<p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 132.65pt; TEXT-ALIGN: justify; mso-char-indent-count: 11.01; tab-stops: 133.5pt;"><b style="mso-bidi-font-weight: normal;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><font size="4">第五节<span lang="EN-US"><span style="mso-spacerun: yes;"> </span></span>一级复床除盐<span lang="EN-US"><p></p></span></font></span></b></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><font size="4"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><span style="mso-spacerun: yes;"> </span></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';">水只一次顺序通过<span lang="EN-US">H</span>型和<span lang="EN-US">OH</span>型离子交换树脂进行除盐,称为一级复床除盐,典型的一级复床除盐系统,它包括强酸性<span lang="EN-US">H</span>离子交换器(阳床),除碳器和强碱性<span lang="EN-US">OH<sup>-</sup></span>离子交换器(阴床)。交换器一般采用固定床,再生方式可选用顺流式或对流式。系统多为单元式,也有母管式的。如图<span lang="EN-US">5-5</span>所示<span lang="EN-US">.<p></p></span></span></font></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><p><font size="4"> </font></p></span></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><shapetype id="_x0000_t75" stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" opreferrelative="t" ospt="75" coordsize="21600,21600"><stroke joinstyle="miter"></stroke><formulas><f eqn="if lineDrawn pixelLineWidth 0"></f><f eqn="sum @0 1 0"></f><f eqn="sum 0 0 @1"></f><f eqn="prod @2 1 2"></f><f eqn="prod @3 21600 pixelWidth"></f><f eqn="prod @3 21600 pixelHeight"></f><f eqn="sum @0 0 1"></f><f eqn="prod @6 1 2"></f><f eqn="prod @7 21600 pixelWidth"></f><f eqn="sum @8 21600 0"></f><f eqn="prod @7 21600 pixelHeight"></f><f eqn="sum @10 21600 0"></f></formulas><path oconnecttype="rect" gradientshapeok="t" oextrusionok="f"></path><lock aspectratio="t" vext="edit"></lock></shapetype><shape id="_x0000_i1025" type="#_x0000_t75" style="WIDTH: 229.5pt; HEIGHT: 128.25pt;"><imagedata otitle="" src="file:///C:\DOCUME~1\甄长红\LOCALS~1\Temp\msohtml1\01\clip_image001.png"><font size="4"></font></imagedata></shape><p></p></span></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 11.95pt; TEXT-ALIGN: justify; tab-stops: 133.5pt; mso-para-margin-left: 1.14gd;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><font size="4">图<span lang="EN-US">5-5 </span>一级复床除盐系统<span lang="EN-US"><p></p></span></font></span></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><font size="4"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><span style="mso-spacerun: yes;"> </span><span style="mso-spacerun: yes;"> </span>1<span style="mso-spacerun: yes;"> </span></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';">强酸性<span lang="EN-US">H</span>型交换器<span lang="EN-US"><span style="mso-spacerun: yes;"> </span>2<span style="mso-spacerun: yes;"> </span></span>除碳器<span lang="EN-US"> 3<span style="mso-spacerun: yes;"> </span></span>强碱性<span lang="EN-US">OH</span>型交换器<span lang="EN-US"><p></p></span></span></font></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><font size="4"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><span style="mso-spacerun: yes;"> </span></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';">一、原理<span lang="EN-US"><p></p></span></span></font></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><font size="4"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><span style="mso-spacerun: yes;"> </span></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';">进入除盐系统的原水中,常含有<span lang="EN-US">Ca<sup>2</sup></span><sup>+</sup>、<span lang="EN-US">Mg<sup>2</sup></span><sup>+</sup>、<span lang="EN-US">Na<sup>2</sup></span><sup>+</sup>等阳离子和<span lang="EN-US">SO<sub>4</sub><sup>2-</sup></span>、<span lang="EN-US">Cl<sup>-</sup></span>、<span lang="EN-US">HCO<sub>3</sub><sup>-</sup></span>等阴离子,以及弱酸<span lang="EN-US">H<sub>2</sub>CO<sub>3</sub></span>和<span lang="EN-US">H<sub>2</sub>SiO<sub>3</sub></span>。当此水通过强酸<span lang="EN-US">H</span>型树脂层时,水中各种阳离子均被树脂吸着,树脂上的<span lang="EN-US">H</span><sup>+</sup>被置换到水中。其反应可用下式综合表示,<span lang="EN-US"><p></p></span></span></font></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 10pt; TEXT-INDENT: -10pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><shapetype id="_x0000_t87" filled="f" path="m21600,qx10800@0l10800@2qy0@11,10800@3l10800@1qy21600,21600e" ospt="87" coordsize="21600,21600" adj="1800,10800"><formulas><f eqn="val #0"></f><f eqn="sum 21600 0 #0"></f><f eqn="sum #1 0 #0"></f><f eqn="sum #1 #0 0"></f><f eqn="prod #0 9598 32768"></f><f eqn="sum 21600 0 @4"></f><f eqn="sum 21600 0 #1"></f><f eqn="min #1 @6"></f><f eqn="prod @7 1 2"></f><f eqn="prod #0 2 1"></f><f eqn="sum 21600 0 @9"></f><f eqn="val #1"></f></formulas><path oconnecttype="custom" textboxrect="13963,@4,21600,@5" oconnectlocs="21600,0;0,10800;21600,21600" arrowok="t"></path><handles><h position="center,#0" yrange="0,@8"></h><h position="topLeft,#1" yrange="@9,@10"></h></handles></shapetype><shape id="_x0000_s1029" type="#_x0000_t87" style="MARGIN-TOP: 6pt; Z-INDEX: 4; LEFT: 0px; MARGIN-LEFT: 309.75pt; WIDTH: 7.5pt; POSITION: absolute; HEIGHT: 36pt; 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Z-INDEX: 1; LEFT: 0px; MARGIN-LEFT: 114pt; WIDTH: 8.25pt; POSITION: absolute; HEIGHT: 33.75pt; TEXT-ALIGN: left;"><font size="4"></font></shape><font size="4"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><span style="mso-spacerun: yes;"> </span>Mg<span style="mso-spacerun: yes;"> </span></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';">(<span lang="EN-US">HCO<sub>3</sub></span>)<sub><span lang="EN-US">2</span></sub><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>Ca<span style="mso-spacerun: yes;"> </span>(HCO<sub>3</sub>)<sub>2</sub><p></p></span></span></font></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><font size="4"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><span style="mso-spacerun: yes;"> </span>R(SO<sub>3</sub>H)<sub>2</sub> + Ca<span style="mso-spacerun: yes;"> </span>SO<sub>4</sub><span style="mso-spacerun: yes;"> </span></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';">→<span lang="EN-US"> R(SO<sub>3</sub>)<sub>2<span style="mso-spacerun: yes;"> </span></sub><span style="mso-spacerun: yes;"> </span>Mg + H<sub>2</sub><span style="mso-spacerun: yes;"> </span>SO<sub>4</sub><p></p></span></span></font></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><font size="4"><span style="mso-spacerun: yes;"> </span>Na<sub>2</sub><span style="mso-spacerun: yes;"> </span>Cl<sub>2</sub><span style="mso-spacerun: yes;"> </span>Na<sub>2</sub><span style="mso-spacerun: yes;"> </span>Cl<sub>2</sub><p></p></font></span></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><font size="4"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><span style="mso-spacerun: yes;"> </span></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';">所以,此<span lang="EN-US">H</span>型交换器的出水呈酸性,其中含有和进水中阴离子相应的<span lang="EN-US">H<sub>2</sub>SO<sub>4</sub></span>和<span lang="EN-US">HCl</span>等强酸,以及<span lang="EN-US">H<sub>2</sub>CO<sub>3</sub></span>和<span lang="EN-US">HSiO<sub>4</sub></span>等弱酸。这种含有<span lang="EN-US">CO<sub>2</sub></span>和其他无机酸的水,先经除碳器除去<span lang="EN-US">CO<sub>2</sub></span>(其残留量可达<span lang="EN-US">5mg/L</span>以下),之后,通过强碱性<span lang="EN-US">OH</span>型树脂时,水中各种阴离子均被树脂吸着,树脂上的<span lang="EN-US">OH<sup>-</sup></span>被置换到水中,与水中的<span lang="EN-US">H</span><sup>+</sup>结合成水。<span lang="EN-US"><p></p></span></span></font></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><font size="4"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><span style="mso-spacerun: yes;"> </span><span style="mso-spacerun: yes;"> </span></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';">通过一级复床除盐的出水水质:硅酸达<span lang="EN-US">0.1mg/L SiO<sub>2</sub></span>以下,电导率达<span lang="EN-US">5uS/cm</span>以下。<span lang="EN-US"><p></p></span></span></font></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><font size="4"><span style="mso-spacerun: yes;"> </span><p></p></font></span></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><font size="4"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><span style="mso-spacerun: yes;"> </span></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';">二、除碳器的运行<span lang="EN-US"><p></p></span></span></font></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><font size="4"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><span style="mso-spacerun: yes;"> </span></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';">除碳器有鼓风式和真空式两种。前者只能除去二氧化碳;后者不仅能除去二氧化碳,还可以除去氧气等各种溶解气体。目前采用比较广泛的是鼓风式除碳器。<span lang="EN-US"><p></p></span></span></font></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><font size="4"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><span style="mso-spacerun: yes;"> </span></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';">鼓风式除碳器的结构为圆柱型塔式结构,由配水装置、填料层(拉希环、多面空心塑料球、波纹板等)和鼓风装置(脱碳风机)所组成。水从上部进入塔体,由配水装置均匀地喷淋在填料表面形成水膜,经填料层与空气接触后,流入下部集水箱(中间水箱)。空气由鼓风机从塔底鼓入,与水中析出的二氧化碳一起从顶部排出。<span lang="EN-US"><p></p></span></span></font></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><font size="4"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><span style="mso-spacerun: yes;"> </span></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';">水通过鼓风机除碳,一般可将<span lang="EN-US">CO<sub>2</sub></span>含量降至<span lang="EN-US">5mg/L</span>以下。<span lang="EN-US"><p></p></span></span></font></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><font size="4"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><span style="mso-spacerun: yes;"> </span>2</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';">、真空式除碳器<span lang="EN-US"><p></p></span></span></font></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><font size="4"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><span style="mso-spacerun: yes;"> </span></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';">真空式除碳器是利用真空泵或喷射器从除碳器的上部抽真空,使水在常温下呈沸腾状态以除去气体。<span lang="EN-US"><p></p></span></span></font></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><font size="4"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><span style="mso-spacerun: yes;"> </span></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';">水由上部进入塔体,经喷水装置后,在整个截面上喷成雾状,再经填料层后呈水膜状向下流动;所释放的气体则通过顶部真空管路抽出塔外。真空式除碳器的淋洗密度一般为<span lang="EN-US">40</span>~<chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="60" unitname="m3"><span lang="EN-US">60m<sup>3</sup></span></chmetcnv><span lang="EN-US">/(m<sup>3</sup></span>·<span lang="EN-US">h)</span>。<span lang="EN-US"><p></p></span></span></font></p><p class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt 12pt; TEXT-INDENT: -12pt; TEXT-ALIGN: justify; mso-char-indent-count: -1.0; tab-stops: 133.5pt;"><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman';"><p><font size="4"> </font></p></span></p> |