“W”形火焰燃烧方式所采用的燃烧器简介—1

<span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">1&nbsp;</span><span style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">、</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">&nbspAX</span><span style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">型双调风旋流燃烧器</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">&nbsp;&nbsp;<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br/>1</span><span style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">．</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">1&nbspAX</span><span style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">型燃烧器是在双调风旋流式燃烧器的基础上，增设了</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">AX</span><span style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">装置（将煤粉气流中的部分冷风分离出来形成分级风，并在燃烧器内送入热空气加热煤粉气流）的新型煤粉燃烧器。它由内外环形通道、旋流叶片、可动叶片、入口弯管、出口扩锥、乏气抽出管等组成。如河北上安电厂</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">#1</span><span style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">，</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">2</span><span style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">锅炉。</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;"><br/>&nbsp;&nbsp;&nbsp;1</span><span style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">．</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">2&nbsp;&nbsp;</span><span style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">工作原理：来自双进双出球磨机的一次风粉气流在通过燃烧前的弯头后，由于离心力的作用，绝大多数煤粉颗粒被分离出来，集中在一次风管中，这部分浓缩后的煤粉与增压风机送来的热风均匀混合并被加热，然后喷入炉膛。分离出来的含有</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">10%</span><span style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">的煤粉，这股气流经乏气管引入下炉膛燃烧，还可以补充后期燃烧所需的氧量。浓缩后一次风的煤粉温度提高，有利于着火与稳燃。旋流燃烧器引入的内外二次风可及时卷吸高温热烟气并适时补充燃烧所需的空气，有利于着火与燃烬。</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;"><br/>&nbsp;&nbsp;&nbsp;1</span><span style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">．</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">3&nbsp;&nbsp;</span><span style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">燃烧调整：调节内环形通道的旋流叶片，能改变二次风的旋流强度，以适应煤种及负荷的变化，保持燃烧稳定；内二次风量的大小是由单独的风门控制的，此风门可沿轴向拉动，用来调节空气入口间隙即内二次风量的大小；调节外环形通道的可动叶片开度，能改变外二次风量的大小，可调节整个射流的旋卷强度及刚性。燃烧所需的空气除了从拱上通过燃烧器内外二次风套筒引入炉膛外，在下炉膛前后墙适当位置布置了分级风，分级风采用风墙形式，形成水冷壁四周的富氧气氛，既有效地抑制了</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">NOx</span><span style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">的生成，并能防止水冷壁的结渣。设置分级风，使燃烧器的调节性能进一步提高。高负荷时，减少分级风，增大燃烧器二次风量，可使火焰增长，火焰中心下移，燃烧停留时间延长，有利于燃烬。但对于难燃煤，如果燃烧器的二次风量过多则会影响着火稳定性。低负荷时，增大分级风，减少燃烧器的二次风量，有利于稳定着火及燃烧。</span><span lang="EN-US" style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Tahoma; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;"><br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>

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