[原创]浅谈3030t/h锅炉燃烧设备-下篇

naha · 发表于 2007-11-20 15:22:00

浅谈3030t/h锅炉燃烧设备-下篇陈宝祥   尹民权    华电国际邹县发电厂  【摘要】本文针对#7炉双进双出钢球式磨煤机一次风粉管道积粉，根据运行中燃烧器入口一次风温度偏低的情况，结合锅炉现状，从设计、安装、以及煤炭质量等角度，分析了影响一次风温度的变化以及对一次风管道积粉的原因。提出了防止的措施和建议。  【关键词】煤粉锅炉  一次风管道     风温低、积粉    原因分析   目录 1.概述2.存在问题2.1#7炉一次风粉管道煤粉沉积堵管2.2燃烧器入口一次风温度降低明显3.原因分析3.1入炉煤品质变化3.2燃煤水分的影响3.3燃煤灰分、发热量的影响3.4一次风系统管道距离长3.5一次风管道没有设计保温层3.6 吹扫风系统的影响4.预防措施

naha · 发表于 2007-11-20 15:32:23

1.概述华电国际山东邹县发电厂Ⅳ期工程2×1000MW机组，第一台(#7) 锅炉于<chsdate isrocdate="False" islunardate="False" day="4" month="12" year="2006" wst="on"></chsdate>2006年12月4日<chsdate></chsdate>经过168小时试运正式移交电厂试生产。3030t/h锅炉是东方锅炉（集团）股份有限公司与日本巴布科克-日立公司及东方-日立锅炉有限公司合作设计、联合制造。锅炉为高效超超临界压力变压运行直流炉、一次再热、平衡通风、运转层以上露天布置、固态排渣、全钢构架、全悬吊结构Π型锅炉。设计锅炉效率BRL工况下93.8%，设计发电煤耗<chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="272.9" unitname="g"></chmetcnv>272.9g<chmetcnv></chmetcnv>／kw.h，排烟温度TRL工况下<chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="121.2" unitname="℃"></chmetcnv>121.2℃<chmetcnv></chmetcnv>。锅炉配套安装6台BBD4360型双进双出钢球式磨煤机，采用一次风机正压直吹式制粉系统。磨制后的煤粉从磨煤机的两端经过外置式分离器分离后，合格的煤粉通过8条ф480×<chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="True" sourcevalue="10" unitname="mm"></chmetcnv>10 mm<chmetcnv></chmetcnv>一次风管道送入与之相对应的同一层燃烧器。48只燃烧器组成前后墙对冲燃烧方式，燃烧器按3层8列布置，前墙自上而下为E、C、D三层，后墙自上而下为F、A、B三层。2.存在问题2.1#7炉一次风粉管道煤粉沉积堵管<p class="MsoNormal" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 21.1pt; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0;">在<chsdate isrocdate="False" islunardate="False" day="27" month="11" year="2007" wst="on"></chsdate>2007年11月27日<chsdate></chsdate>至<chsdate isrocdate="False" islunardate="False" day="4" month="12" year="2007" wst="on"></chsdate>12月4日<chsdate></chsdate>#7锅炉168小时投产试运过程中，曾有6次发生一次风管道煤粉沉积现象。<chsdate isrocdate="False" islunardate="False" day="27" month="11" year="2007" wst="on"></chsdate>11月27日<chsdate></chsdate>16:20，发现＃7炉F1风粉管道出口温度逐渐降低，温度最低降至<chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="19" unitname="℃"></chmetcnv>19℃<chmetcnv></chmetcnv>，开启吹扫风门吹扫无效，强制关闭分离器至F1风粉管道出口门，打开吹扫风门吹扫。<chsdate isrocdate="False" islunardate="False" day="30" month="11" year="2007" wst="on"></chsdate>11月30日<chsdate></chsdate>22:30，就地测量发现#7炉B4风粉管道出口温度逐渐降低，开启B4风粉管道吹扫风门进行吹扫。<chsdate isrocdate="False" islunardate="False" day="1" month="12" year="2007" wst="on"></chsdate>12月1日<chsdate></chsdate>一次发现#7炉B1风粉管道出口温度逐渐降低，两次发现F5粉管温度降至<chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="17" unitname="℃"></chmetcnv>17℃<chmetcnv></chmetcnv>。开启风粉管道吹扫风门进行吹扫。<chsdate isrocdate="False" islunardate="False" day="3" month="12" year="2007" wst="on"></chsdate>12月3日<chsdate></chsdate>发现#7炉B4一次风管温度偏低。开启B4吹扫风门进行吹扫。<p class="MsoNormal" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 21.1pt; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0;">虽然试运中积粉主要发生在B、F层燃烧器，分析与炉后一次风管道距离、结构和水平管段距离长有关，但是<chsdate isrocdate="False" islunardate="False" day="4" month="12" year="2007" wst="on"></chsdate>12月4日<chsdate></chsdate>11:18#7机组168小时满负荷试运行结束停炉后，敲击检查各燃烧器入口一次风管道水平段，发现多数管道内部都存在有不同程度积粉现象，前墙燃烧器一次风管道水平段同样也存在积粉。打开其中16根一次风管道，发现管道内明显大量积粉，最多的积粉厚度接近管道三分之一。<chsdate isrocdate="False" islunardate="False" day="18" month="12" year="2007" wst="on"></chsdate>12月18日<chsdate></chsdate>锅炉点火后用了近10个小时，吹扫各一次风管。依次开启#7炉吹扫风门，将A4、B1、B2、B3、B5、B6、B7、D1、D2、D3、D4、D5、D6、D8、C6、D7等一次风管道内沉积煤粉吹扫干净。<p class="MsoNormal" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 21.1pt; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0;"><chsdate isrocdate="False" islunardate="False" day="20" month="12" year="2006" wst="on"></chsdate>2006年12月20日<chsdate></chsdate>1:50，#7机组正式与系统并列开始试生产。<chsdate isrocdate="False" islunardate="False" day="3" month="1" year="2007" wst="on"></chsdate>2007年1月3日<chsdate></chsdate>6:5一次风机管道又出现积粉堵塞现象，就地测量#7炉A磨煤机A7、A8一次风机管道温度分别为<chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="6" unitname="℃"></chmetcnv>6℃<chmetcnv></chmetcnv>、<chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="10" unitname="℃"></chmetcnv>10℃<chmetcnv></chmetcnv>，对#7炉A磨煤机A7、A8一次风机管进行吹扫。2.2燃烧器入口一次风温度降低明显<p class="MsoNormal" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 21.1pt; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm; mso-char-indent-count: 2.0;">虽然#7炉运行中多次发生一次风管道积粉、堵塞现象，由于一次风管道没有设计在线风压测量装置，对于管道内的积粉只能用测量一次风管道表面温度来判定。由于受环境温度的影响，11月份管道表面温度最低17℃～<chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="19" unitname="℃"></chmetcnv>19℃<chmetcnv></chmetcnv>，1月份管道表面温度降至6℃～<chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="10" unitname="℃"></chmetcnv>10℃<chmetcnv></chmetcnv>，说明一次风管道内煤粉沉积。通过表1可以看出沿各磨煤机后的一次风管道温度，均存在不同程度的逐渐降低现象。燃烧器入口一次风温度降低会导致喷口着火点远离，造成火焰监测探头观察不到火焰，误发局部灭火的信号。附表1       <chsdate isrocdate="False" islunardate="False" day="19" month="1" year="2007" wst="on"></chsdate>2007年1月19日<chsdate></chsdate>测量#7锅炉运行中制粉系统各部位一次风温度<div align="center"><table class="MsoNormalTable" cellspacing="0" cellpadding="0" width="605" border="1" style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; WIDTH: 16cm; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-border-alt: solid windowtext .5pt; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt;"><tbody><tr style="HEIGHT: 14.9pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes;"><td valign="top" width="115" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 86.55pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.9pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-diagonal-down: .5pt solid windowtext;">         类别名称</td><td width="68" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 51.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.9pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;">磨煤机出口℃</td><td width="68" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 51.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.9pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;">分离器前℃</td><td width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.35pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.9pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;">分离器后℃</td><td width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.9pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;">燃烧器前管道℃</td><td width="70" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 52.6pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.9pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;">排烟温度℃</td><td width="48" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 36pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.9pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;">环境℃</td><td width="48" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 36.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.9pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;">电负荷MW</td></tr><tr style="HEIGHT: 15.65pt; mso-yfti-irow: 1;"><td width="48" rowspan="6" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 36pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">#7炉</td><td valign="top" width="67" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 50.55pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">A磨煤机</td><td width="68" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 51.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">65</td><td width="68" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 51.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">57</td><td width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.35pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">45</td><td width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">29～37</td><td width="70" rowspan="6" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 52.6pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">A侧116B侧115（未投入暖风器）</td><td width="48" rowspan="6" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 36pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">8～11</td><td width="48" rowspan="6" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 36.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">800</td></tr><tr style="HEIGHT: 15.65pt; mso-yfti-irow: 2;"><td valign="top" width="67" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 50.55pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">B磨煤机</td><td width="68" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 51.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">67</td><td width="68" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 51.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">56</td><td width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.35pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">48</td><td width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">34～38</td></tr><tr style="HEIGHT: 15.65pt; mso-yfti-irow: 3;"><td valign="top" width="67" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 50.55pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">C磨煤机</td><td width="68" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 51.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">64</td><td width="68" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 51.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">60</td><td width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.35pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">47</td><td width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">38～41</td></tr><tr style="HEIGHT: 15.65pt; mso-yfti-irow: 4;"><td valign="top" width="67" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 50.55pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">D磨煤机</td><td width="68" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 51.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">70</td><td width="68" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 51.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">59</td><td width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.35pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">47</td><td width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">36～42</td></tr><tr style="HEIGHT: 15.65pt; mso-yfti-irow: 5;"><td valign="top" width="67" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 50.55pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">E磨煤机</td><td width="68" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 51.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">65</td><td width="68" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 51.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">56</td><td width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.35pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">46</td><td width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">28～33</td></tr><tr style="HEIGHT: 15.65pt; mso-yfti-irow: 6; mso-yfti-lastrow: yes;"><td valign="top" width="67" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 50.55pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">F磨煤机</td><td width="68" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 51.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">65</td><td width="68" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 51.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">62</td><td width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.35pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">48</td><td width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">30～37</td></tr></tbody></table></div>注：①磨煤机出口温度、排烟温度和电负荷为在线参数，其余为笔者用红外线测温仪就地测量采集<span style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">②燃烧器前一次风管道温度为该制粉系统各条一次风管道的平均值。（仅供参考）。

naha · 发表于 2007-11-20 15:35:58

[Post=100]3.原因分析<p class="MsoNormal" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 21.1pt; mso-char-indent-count: 2.0; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm;">为了更好的使用和管理好1000MW机组设备，从设备的设计、构造以及通过试生产期间所发生的问题进行汇总探讨。对造成一次风管道水平管段内部积粉、堵塞的原因，除了“168”试运期间机组平均负荷率高100.06%，一次风煤粉细度、煤粉浓度，一次风流速低、环境温度等有关外，分析还与以下原因有关：3.1入炉煤品质变化<p class="MsoNormal" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 21.1pt; mso-char-indent-count: 2.0; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm;">邹县电厂Ⅳ期锅炉的设计煤种为兖州矿区和淄博济北矿区供应（Ⅰ、Ⅱ期和Ⅲ期锅炉的设计燃用的兖州矿区煤），煤种的简要成分和耗煤量见附表2。山东省目前有14个国家统配<p class="MsoNormal" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 21.1pt; mso-char-indent-count: 2.0; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm;">附表2                     Ⅳ期锅炉燃煤量及简要特性<p class="MsoNormal" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 10.55pt; mso-char-indent-count: 1.0; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm;"><shape id="_x0000_s1026" strokeweight="1.5pt" filled="f" path="m,l8370,2e" coordsize="8370,2" style="MARGIN-TOP: 0px; Z-INDEX: 1; LEFT: 0px; MARGIN-LEFT: 0px; WIDTH: 453.55pt; POSITION: absolute; HEIGHT: 0.1pt; TEXT-ALIGN: left; mso-position-horizontal: absolute; mso-position-vertical: absolute;"><path arrowok="t"></path></shape>燃料     收到基低位发热量Qnet.v.ar   灰份% Aar   全水份% Mt 干燥无灰基挥发份% Vdaf<shape id="_x0000_s1028" filled="f" path="m,7l8340,e" coordsize="8340,7" style="MARGIN-TOP: 15.25pt; Z-INDEX: 3; LEFT: 0px; MARGIN-LEFT: 0px; WIDTH: 453.55pt; POSITION: absolute; HEIGHT: 0.35pt; TEXT-ALIGN: left; mso-position-horizontal: absolute; mso-position-vertical: absolute;"><path arrowok="t"></path></shape><shape id="_x0000_s1027" filled="f" path="m,l8400,1e" coordsize="8400,1" style="MARGIN-TOP: 0.2pt; Z-INDEX: 2; LEFT: 0px; MARGIN-LEFT: 0px; WIDTH: 453.55pt; POSITION: absolute; HEIGHT: 0.05pt; TEXT-ALIGN: left; mso-position-horizontal: absolute; mso-position-vertical: absolute;"><path arrowok="t"></path></shape>设计煤种       21271J/g                  24.40       8.00            39        校核煤种       19053J/g                  27.75       10.00            37.73<shape id="_x0000_s1029" strokeweight="1.5pt" filled="f" path="m,4l8355,e" coordsize="8355,4" style="MARGIN-TOP: -0.2pt; Z-INDEX: 4; LEFT: 0px; MARGIN-LEFT: 0px; WIDTH: 453.55pt; POSITION: absolute; HEIGHT: 0.2pt; TEXT-ALIGN: left; mso-position-horizontal: absolute; mso-position-vertical: absolute;"><path arrowok="t"></path></shape>煤矿及地方大型煤矿向山东电网的电厂供煤，由于供量不足，我厂同省内其他电厂一样，还需要燃用小窑煤，由于不能保证燃用设计煤种，也已形成一种燃用多矿区多煤源的趋势。因此，煤质差异较大，且不稳定，总的来说，国家统配煤矿煤质较为稳定，但是也有部分矿以次充好（最明显的是水分增大），致使煤质下降。而小窑煤及经中转港进的煤普遍较差，人为地掺入经过破碎的矸石等杂质，难以控制。由于供煤紧张，不得不掺烧高硫煤和山西煤。根据我厂目前的现状，煤场没有足够的存煤，设计存煤76.9万吨煤的七个露天储煤场，和设计存煤1.4万吨煤的6个圆筒仓，本应储存近百万吨煤的储煤设施，近年来经常存煤量不超过10万吨，严重时只有几百吨到几千吨。也就是来煤卸火车后就直接输送到锅炉原煤仓，无法实现倒仓、凉晒、掺混和配煤。从我厂燃煤的来源分为火车和汽车运输两种渠道；火车来煤为兖州矿区和淄博济北矿区国有大型煤矿供应，国有大型煤矿不便大量掺煤矸石等杂物，灰分与发热量还算稳定，由于电厂对入厂煤的检斤采用电子磅秤，只有多加点水，所以火车来煤水分大。汽车煤来源比较杂，小煤矿和小公司占的比例高，煤中掺假现象严重，煤质差，灰分含量高发热量偏低，通过附表3可以看出近年来煤质的变化情况。2006年共进汽车煤约211万吨，2007年两台1000MW机组全部投产，为了保证1000MW机组的安全稳定运行，因为火车来煤质量相对比较稳定，1000MW机组锅炉全部烧火车来煤（Ⅳ期没有投产前Ⅲ期享受此待遇）。照此发展预计2007年汽车煤将达400多万吨，燃煤质量保证困难，煤质对设备、对燃烧的影响，构成安全威胁，并影响锅炉的经济效益。3.2燃煤水分的影响<p class="MsoNormal" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 21.1pt; mso-char-indent-count: 2.0; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm;">水分是煤中不利杂质，燃煤中水分大小是电力用煤的一项重要指标。水是煤中不可燃成分，煤中水分越高，不但增加运输和经济负担，主要是降低热值使锅炉烟气体积增加，由烟气带走的热量也大，因此增加了排烟热损失和风机的能耗。所以一般电厂入炉煤全水分控制在5%～8%，如果水分超过8.6%以上，就会造成给煤机落煤管堵煤，水分超过10.4%以上，不但导致磨煤机空心轴粘煤，还造成原煤仓及煤斗积煤等。实际上入炉煤的水分时常在11%以上。<p class="MsoNormal" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 21.1pt; mso-char-indent-count: 2.0; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm;">我们知道，一次风管道煤粉沉积堵粉，除了与一次风流速和煤粉浓度有关外，还与煤粉中的水分有关，通常煤粉中的水分是用磨煤机出口风粉混合物的温度来衡量的。我们不妨把磨煤机罐体看作一个压力容器，正常运行中罐体内压力达11kPa左右，从预热器来的热一次风在<chmetcnv wst="on" unitname="℃" sourcevalue="336" hasspace="False" negative="False" numbertype="1" tcsc="0">336℃</chmetcnv>（一般磨煤机入口最佳温度控制在<chmetcnv wst="on" unitname="℃" sourcevalue="270" hasspace="False" negative="False" numbertype="1" tcsc="0">270℃</chmetcnv>左右），经过冷热一次风混合后的混合风温<chmetcnv wst="on" unitname="℃" sourcevalue="212" hasspace="False" negative="False" numbertype="1" tcsc="0">212℃</chmetcnv>，既便如此磨煤机罐体表面温度也可达到<chmetcnv wst="on" unitname="℃" sourcevalue="130" hasspace="False" negative="False" numbertype="1" tcsc="0">130℃</chmetcnv>左右。燃煤中的水分在磨煤机内的研磨、加热过程中，煤的内水分和外水分均吸热汽化，经过烘干后的煤粉与空气形成的一次风粉混合物中水分子以过热蒸汽的形式存在，空气压缩后水分子的含量约10～40g/m3（现在不仅是空气中水分而且燃煤中有10%的水分被蒸发析出），一次风粉混合物离开磨煤机后，随着温度的降低水分子变为饱和状态。一般中间储仓式制粉系统当煤粉进入煤粉仓后，温降产生的水蒸汽被吸潮管吸走，有效的防止了煤粉粘结。而现在采用的单位直吹式制粉系统，又是正压制粉，磨煤机中研磨、加热过程中蒸发出的水分没有施放点，只能经过燃烧器进入炉膛，而一次风粉混合物在离开磨煤机（分离器）后随着一次风粉混合物压力、温度的降低，风粉混合物中的水分子析出，达到露点温度，使处在饱和状态水分子凝结，促使煤粉附着粘结在煤粉管道内壁上，使煤粉粘结沉淀，管壁温度越低（达到<chmetcnv wst="on" unitname="℃" sourcevalue="6" hasspace="False" negative="False" numbertype="1" tcsc="0">6℃</chmetcnv>、<chmetcnv wst="on" unitname="℃" sourcevalue="10" hasspace="False" negative="False" numbertype="1" tcsc="0">10℃</chmetcnv>），粘结俞加严重。燃煤水分的大小不仅影响着火，还会降低燃烧的经济性，煤粉中的水分过大时，将直接影响煤粉流动的连续性和均匀性，同时还会促使煤粉沉积在煤粉管道内造成堵管。<p class="MsoNormal" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 21.1pt; mso-char-indent-count: 2.0; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm;">附表3               2002年以来我厂煤质数据变化量对比表<div align="center"><table class="MsoNormalTable" cellspacing="0" cellpadding="0" border="1" style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-table-layout-alt: fixed; mso-border-alt: solid windowtext .5pt; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext;"><tbody><tr style="HEIGHT: 18.75pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes;"><td valign="bottom" width="75" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 56.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 18.75pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt;">#1～4炉       年平均值</td><td valign="bottom" width="133" colspan="3" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 99.75pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 18.75pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;">低位发热量   Qnet,ar MJ/kg</td><td valign="bottom" width="121" colspan="3" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 90.75pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 18.75pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;">灰分             Aad %</td><td valign="bottom" width="108" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 80.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 18.75pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;">全水分          Mt %</td><td valign="bottom" width="131" colspan="3" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 98.6pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 18.75pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;">挥发分        Vad %</td></tr><tr style="HEIGHT: 14.25pt; mso-yfti-irow: 1;"><td valign="bottom" width="75" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 56.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">2002年</td><td valign="bottom" width="61" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 46.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">22.59</td><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.7pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">与上年比</td><td valign="bottom" width="49" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 37.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">21.80</td><td valign="bottom" width="72" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">与上年比</td><td valign="bottom" width="36" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 27pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">8.0</td><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">与上年比</td><td valign="bottom" width="58" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 43.35pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">30.02</td><td valign="bottom" width="74" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 55.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">与上年比</td></tr><tr style="HEIGHT: 14.25pt; mso-yfti-irow: 2;"><td valign="bottom" width="75" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 56.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">2003年</td><td valign="bottom" width="61" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 46.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">22.71</td><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.7pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.12</td><td valign="bottom" width="49" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 37.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">21.89</td><td valign="bottom" width="72" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.09</td><td valign="bottom" width="36" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 27pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">8.6</td><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.6</td><td valign="bottom" width="58" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 43.35pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">29.73</td><td valign="bottom" width="74" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 55.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-0.29</td></tr><tr style="HEIGHT: 14.25pt; mso-yfti-irow: 3;"><td valign="bottom" width="75" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 56.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">2004年</td><td valign="bottom" width="61" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 46.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">22.11</td><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.7pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-0.6</td><td valign="bottom" width="49" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 37.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">23.43</td><td valign="bottom" width="72" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">1.54</td><td valign="bottom" width="36" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 27pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">8.6</td><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0</td><td valign="bottom" width="58" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 43.35pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">29.51</td><td valign="bottom" width="74" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 55.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-0.22</td></tr><tr style="HEIGHT: 17.25pt; mso-yfti-irow: 4;"><td valign="bottom" width="75" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 56.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">2005年</td><td valign="bottom" width="61" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 46.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">20.73</td><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.7pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-1.38</td><td valign="bottom" width="49" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 37.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">26.48</td><td valign="bottom" width="72" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">3.05</td><td valign="bottom" width="36" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 27pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">9.3</td><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.7</td><td valign="bottom" width="58" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 43.35pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">27.89</td><td valign="bottom" width="74" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 55.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-1.62</td></tr><tr style="HEIGHT: 17.25pt; mso-yfti-irow: 5;"><td valign="bottom" width="75" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 56.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">2006年</td><td valign="bottom" width="61" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 46.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">19.28</td><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.7pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-1.45</td><td valign="bottom" width="49" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 37.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">31.07</td><td valign="bottom" width="72" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">4.59</td><td valign="bottom" width="36" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 27pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">8.9</td><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-0.4</td><td valign="bottom" width="58" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 43.35pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">27.54</td><td valign="bottom" width="74" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 55.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-0.35</td></tr><tr style="HEIGHT: 17.25pt; mso-yfti-irow: 6;"><td width="75" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 56.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">#5、#6炉年平均值</td><td width="133" colspan="3" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 99.75pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">低位发热量   Qnet,ar MJ/kg</td><td width="121" colspan="3" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 90.75pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">灰分   Aad %</td><td width="108" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 80.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">全水分  Mt %</td><td width="131" colspan="3" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 98.6pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">挥发分   Vad %</td></tr><tr style="HEIGHT: 17.25pt; mso-yfti-irow: 7;"><td valign="bottom" width="75" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 56.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">2002年</td><td valign="bottom" width="60" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 45pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">22.66</td><td valign="bottom" width="73" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.75pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">与上年比</td><td valign="bottom" width="50" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 37.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">21.60</td><td valign="bottom" width="71" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">与上年比</td><td valign="bottom" width="36" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 27pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">8.0</td><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">与上年比</td><td valign="bottom" width="61" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 45.6pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">30.06</td><td valign="bottom" width="71" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">与上年比</td></tr><tr style="HEIGHT: 17.25pt; mso-yfti-irow: 8;"><td valign="bottom" width="75" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 56.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">2003年</td><td valign="bottom" width="60" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 45pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">22.70</td><td valign="bottom" width="73" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.75pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-0.04</td><td valign="bottom" width="50" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 37.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">21.93</td><td valign="bottom" width="71" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.33</td><td valign="bottom" width="36" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 27pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">8.4</td><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-0.4</td><td valign="bottom" width="61" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 45.6pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">29.69</td><td valign="bottom" width="71" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-0.37</td></tr><tr style="HEIGHT: 17.25pt; mso-yfti-irow: 9;"><td valign="bottom" width="75" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 56.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">2004年</td><td valign="bottom" width="60" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 45pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">22.47</td><td valign="bottom" width="73" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.75pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.23</td><td valign="bottom" width="50" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 37.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">22.63</td><td valign="bottom" width="71" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.7</td><td valign="bottom" width="36" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 27pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">8.5</td><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-0.1</td><td valign="bottom" width="61" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 45.6pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">29.66</td><td valign="bottom" width="71" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-0.03</td></tr><tr style="HEIGHT: 17.25pt; mso-yfti-irow: 10;"><td valign="bottom" width="75" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 56.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">2005年</td><td valign="bottom" width="60" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 45pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">21.56</td><td valign="bottom" width="73" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.75pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-0.91</td><td valign="bottom" width="50" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 37.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">24.00</td><td valign="bottom" width="71" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">1.37</td><td valign="bottom" width="36" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 27pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">9.5</td><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-1.0</td><td valign="bottom" width="61" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 45.6pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">28.54</td><td valign="bottom" width="71" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-1.12</td></tr><tr style="HEIGHT: 17.25pt; mso-yfti-irow: 11; mso-yfti-lastrow: yes;"><td valign="bottom" width="75" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 56.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">2006年</td><td valign="bottom" width="60" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 45pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">20.76</td><td valign="bottom" width="73" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 54.75pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">-0.8</td><td valign="bottom" width="50" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 37.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">26.77</td><td valign="bottom" width="71" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">2.77</td><td valign="bottom" width="36" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 27pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">9.2</td><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.3</td><td valign="bottom" width="61" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 45.6pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">28.82</td><td valign="bottom" width="71" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 53pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.28</td></tr><tr><td width="79" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"></td><td width="63" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"></td><td width="1" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"></td><td width="75" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"></td><td width="57" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"></td><td width="1" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"></td><td width="74" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"></td><td width="40" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"></td><td width="75" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"></td><td width="61" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"></td><td width="3" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"></td><td width="74" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent;"></td></tr></tbody></table></div>3.3燃煤灰分、发热量的影响燃煤中灰分与发热量是衡量电力用煤的重要指标，也是煤炭计价的主要依据。燃煤中灰分与发热量之间有相关性。灰分越高，可燃成分越少，发热量降低，燃烧温度下降，燃烧稳定性减弱，降低锅炉效率。一般煤粉炉使用烟煤，灰分在20～30%，不得超过40%，应用基低位发热量在19000～23000 J/g，最低不少于16700 J/g。近年以来入炉煤灰份偏高，煤质逐年变差见表3，特别是汽车进煤灰份有时高达43%。煤的发热量也偏低，有时只有14900J/g～15300 J/g。燃煤灰分含量增加，不但增加了灰渣量的产生，而且阻止了挥发分的析出，煤中杂质多，燃煤热值下降，导致负荷上不去，机组降出力，甚至投用助燃用油。<chsdate wst="on" year="2005" month="1" day="18" islunardate="False" isrocdate="False">2005年1月18日</chsdate>，#4锅炉电负荷320MW，由于煤质差运行甲、乙、丙、丁四套制粉系统制粉困难，炉膛负压不稳被迫投油助燃2小时。Ⅲ期锅炉经常因为煤质差，导致着火点远，火焰监测信号报警或磨煤机跳闸。由于燃煤质量下降，厂用电逐年增加（见附表4），不但制粉电耗、风机电耗增加，同时因为灰分增加，锅炉的受热面磨损加大，特别是尾部受热面，当然制粉系统的磨损更加严重，相应的增加了维护费用。<p class="MsoNormal" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 21.1pt; mso-char-indent-count: 2.0; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm;">附表4              全厂2004年以来厂用电率统计表<div align="center"><table class="MsoNormalTable" cellspacing="0" cellpadding="0" border="1" style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-table-layout-alt: fixed; mso-border-alt: solid windowtext .5pt; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext;"><tbody><tr style="HEIGHT: 5.05pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes; page-break-inside: avoid;"><td valign="bottom" width="72" rowspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 54pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 5.05pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-diagonal-down: .5pt solid windowtext;"><p class="MsoNormal" align="right" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 21.1pt; TEXT-ALIGN: right; mso-char-indent-count: 2.0; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm;">类别时间</td><td valign="bottom" width="252" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 189pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 5.05pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;">制粉电耗%</td><td valign="bottom" width="228" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 171pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 5.05pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;">风机电耗%</td></tr><tr style="HEIGHT: 10.5pt; mso-yfti-irow: 1; page-break-inside: avoid;"><td valign="bottom" width="108" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 81pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 10.5pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">磨煤机%</td><td valign="bottom" width="144" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 108pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 10.5pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">排粉机（一次风机）</td><td valign="bottom" width="112" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 83.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 10.5pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">送风机%</td><td valign="bottom" width="116" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 87.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 10.5pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">吸风机%</td></tr><tr style="HEIGHT: 5.65pt; mso-yfti-irow: 2; page-break-inside: avoid;"><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 54pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 5.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">2004年</td><td valign="bottom" width="108" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 81pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 5.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.76</td><td valign="bottom" width="144" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 108pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 5.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.7</td><td valign="bottom" width="112" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 83.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 5.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.18</td><td valign="bottom" width="116" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 87.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 5.65pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.49</td></tr><tr style="HEIGHT: 17.25pt; mso-yfti-irow: 3; page-break-inside: avoid;"><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 54pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">2005年</td><td valign="bottom" width="108" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 81pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.79</td><td valign="bottom" width="144" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 108pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.7</td><td valign="bottom" width="112" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 83.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.19</td><td valign="bottom" width="116" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 87.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.52</td></tr><tr style="HEIGHT: 17.25pt; mso-yfti-irow: 4; mso-yfti-lastrow: yes; page-break-inside: avoid;"><td valign="bottom" width="72" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 54pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">2006年</td><td valign="bottom" width="108" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 81pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.83</td><td valign="bottom" width="144" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 108pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.73</td><td valign="bottom" width="112" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 83.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.18</td><td valign="bottom" width="116" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 87.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 17.25pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;">0.55</td></tr></tbody></table></div>3.4一次风系统管道距离长<p class="MsoNormal" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 21.1pt; mso-char-indent-count: 2.0; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm;">早期的超高压锅炉，直吹式制粉系统从磨煤机出口到燃烧器的一次风管道距离有10几米或几十米，现在的百万机组锅炉的上层燃烧器标高30多米，且炉膛体积庞大。一次风管道长短差别大，最上层燃烧器标高<chmetcnv wst="on" unitname="mm" sourcevalue="31408.3" hasspace="False" negative="False" numbertype="1" tcsc="0">31408.3mm</chmetcnv>，虽然比Ⅲ期锅炉顶层燃烧器标高（<chmetcnv wst="on" unitname="mm" sourcevalue="32220" hasspace="False" negative="False" numbertype="1" tcsc="0">32220mm</chmetcnv>）低，但一次风管道环绕锅炉则长达120多米（#7炉炉膛宽度<chmetcnv wst="on" unitname="mm" sourcevalue="33973.4" hasspace="True" negative="False" numbertype="1" tcsc="0">33973.4 mm</chmetcnv>，炉膛深度<chmetcnv wst="on" unitname="mm" sourcevalue="15558.4" hasspace="True" negative="False" numbertype="1" tcsc="0">15558.4 mm</chmetcnv>），还有几十米长的水平管段和弯头且爬坡较多。一次风管道没有装设风速测量装置。长时间堵粉，会降低一次风流速，而流速低则就会因风量减少而导致煤粉浓度升高。各磨煤机出口温度接近<chmetcnv wst="on" unitname="℃" sourcevalue="70" hasspace="False" negative="False" numbertype="1" tcsc="0">70℃</chmetcnv>，而到达燃烧器处温度为什么明显差别，有的下降多。从分离器出口至燃烧器入口距离最长的A、F磨煤机一次风管道虽然比Ⅲ期锅炉的顶层燃烧器标高低近<chmetcnv wst="on" unitname="米" sourcevalue="1" hasspace="False" negative="False" numbertype="1" tcsc="0">1米</chmetcnv>，但系统长120多米，一次风温度降低<chmetcnv wst="on" unitname="℃" sourcevalue="25" hasspace="False" negative="False" numbertype="1" tcsc="0">25℃</chmetcnv>左右。Ⅰ、Ⅱ期制粉系统，从磨煤机出口至排粉机入口，一次风管道长130多米温度只降低<chmetcnv wst="on" unitname="℃" sourcevalue="2" hasspace="False" negative="False" numbertype="1" tcsc="0">2℃</chmetcnv>左右。3.5一次风管道没有设计保温层<p class="MsoNormal" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 21.1pt; mso-char-indent-count: 2.0; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm;">按规定设备表面温度高于<chmetcnv wst="on" unitname="℃" sourcevalue="50" hasspace="False" negative="False" numbertype="1" tcsc="0">50℃</chmetcnv>必须采取保温绝热措施。可能现在的设计理念受到用户的影响，不但#7炉各磨煤机两端“V”形分配箱壳体<chmetcnv wst="on" unitname="℃" sourcevalue="77" hasspace="False" negative="False" numbertype="1" tcsc="0">77℃</chmetcnv>、体积庞大的外置式分离器壳体<chmetcnv wst="on" unitname="℃" sourcevalue="60" hasspace="False" negative="False" numbertype="1" tcsc="0">60℃</chmetcnv>均没有保温层，而且给煤机的下煤管表面<chmetcnv wst="on" unitname="℃" sourcevalue="116" hasspace="False" negative="False" numbertype="1" tcsc="0">116℃</chmetcnv>、干燥器表面温度一般在<chmetcnv wst="on" unitname="℃" sourcevalue="145" hasspace="False" negative="False" numbertype="1" tcsc="0">145℃</chmetcnv>（磨煤机入口热风弯头<chmetcnv wst="on" unitname="℃" sourcevalue="185" hasspace="False" negative="False" numbertype="1" tcsc="0">185℃</chmetcnv>）均没有保温层，尤其是100多米长的一次风管道全部没有设计保温层。不但造成漏热影响锅炉效率，而且噪音外泄污染环境，还导致厂房内温度高等。为此在锅炉<chmetcnv wst="on" unitname="米" sourcevalue="0" hasspace="False" negative="False" numbertype="3" tcsc="1">零米</chmetcnv>加装10多台大型轴流风扇，夏季进行强制通风降温。3.6 吹扫风系统的影响<p class="MsoNormal" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 21.1pt; mso-char-indent-count: 2.0; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm;">该磨煤机专门设计有吹扫风系统，吹扫风从冷一次风母管引出，当磨煤机投入或停用时，该系统设计有自动吹扫程序。吹扫风的作用主要是对一次风管道内进行吹扫，防止一次风管道内煤粉沉积堵管。如果吹扫风电动挡板不严密，冷风漏入一次风管道，便会降低一次风温度。按照双进双出钢球式磨煤机设计，一台给煤机运行时，能保证磨煤机出力满负荷运行，并使磨煤机两端分离器处工质的温差不大于<chmetcnv wst="on" unitname="℃" sourcevalue="10" hasspace="False" negative="False" numbertype="1" tcsc="0">10℃</chmetcnv>，正常运行中我厂磨煤机两端分离器入口的温差一般在3℃～<chmetcnv wst="on" unitname="℃" sourcevalue="8" hasspace="False" negative="False" numbertype="1" tcsc="0">8℃</chmetcnv>之间。通过表1可以看出吹扫风门存在内漏现象。4.预防措施4.1解决一次风管道积粉和温度低，是相互相成的关系，Ⅲ期锅炉一次风管道没有装设风压测量装置，由于采用了辅助风系统，所以没有堵粉现象。Ⅳ期锅炉同样没有装设一次风管道风压测量装置，由于没有装设辅助风系统，所以出现堵粉现象。Ⅰ、Ⅱ期锅炉投产时均设计安装有一次风管道风压测量装置，由于采用中间储仓式，可以用给粉机调节下粉量，只有偶尔出现堵粉现象。由此看来首先防止一次风管道温度降低。4.2针对我厂燃用煤种，设计#7炉磨煤机出口温度为<chmetcnv wst="on" unitname="℃" sourcevalue="65" hasspace="False" negative="False" numbertype="1" tcsc="0">65℃</chmetcnv>～<chmetcnv wst="on" unitname="℃" sourcevalue="70" hasspace="False" negative="False" numbertype="1" tcsc="0">70℃</chmetcnv>。我厂Ⅳ期磨煤机正压制粉，抗爆能力强，没有设计防爆门，鉴于我厂近年来入炉煤质下降，挥发分降低，水分升高，对于直吹式制粉系统，可以将磨煤机出口温度由<chmetcnv wst="on" unitname="℃" sourcevalue="70" hasspace="False" negative="False" numbertype="1" tcsc="0">70℃</chmetcnv>改变为<chmetcnv wst="on" unitname="℃" sourcevalue="75" hasspace="False" negative="False" numbertype="1" tcsc="0">75℃</chmetcnv>或<chmetcnv wst="on" unitname="℃" sourcevalue="80" hasspace="False" negative="False" numbertype="1" tcsc="0">80℃</chmetcnv>。国内兄弟电厂的运行经验证明，将燃烧器入口一次风粉混合物温度提高<chmetcnv wst="on" unitname="℃" sourcevalue="10" hasspace="False" negative="False" numbertype="1" tcsc="0">10℃</chmetcnv>，锅炉的排烟温度可以下降<chmetcnv wst="on" unitname="℃" sourcevalue="5" hasspace="False" negative="False" numbertype="1" tcsc="0">5℃</chmetcnv>左右，能提高锅炉效率0.275%，降低煤耗<chmetcnv wst="on" unitname="g" sourcevalue=".99" hasspace="True" negative="False" numbertype="1" tcsc="0">0.99 g</chmetcnv> /Kw.h。预计每年可以节约4504.5吨原煤，节约费用一百多万元。4.3在#7炉制粉系统的一次风管道外部加装保温层，将会使燃烧器入口一次风温度比现在升高<chmetcnv wst="on" unitname="℃" sourcevalue="25" hasspace="False" negative="False" numbertype="1" tcsc="0">25℃</chmetcnv>左右，可以维持在<chmetcnv wst="on" unitname="℃" sourcevalue="65" hasspace="False" negative="False" numbertype="1" tcsc="0">65℃</chmetcnv>运行，将会防止一次风管道积粉。按照年运行6500小时，负荷率70%计算，可以降低煤耗<chmetcnv wst="on" unitname="g" sourcevalue=".99" hasspace="True" negative="False" numbertype="1" tcsc="0">0.99 g</chmetcnv> /Kw.h，全年节约燃料量4504.5吨/年。<p class="MsoNormal" style="MARGIN: 2.4pt 0cm; TEXT-INDENT: 21.1pt; mso-char-indent-count: 2.0; mso-para-margin-top: .2gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .2gd; mso-para-margin-left: 0cm;">照此计算，2006年全年进煤平均价格310.87元/ 吨。310.87（元）×4504.5吨=1400313.92元。去掉设备改造保温材料等因素40万元，投运一年内即可收回全部投资。 [/Post]

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