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layui-col-sm12 layui-col-xs12"> <div class="layui-row layui-col-space22"> <div class="tx"> <h1 class="r18 col0">雙堿法脫硫工藝</h1> <hr class="intdhr"> <span class="r12 indata" >2019-04-23</span> </div> </div> <div class="layui-row layui-col-space20 rmt8"> <div class="layui-col-lg12 layui-col-md12"> <div class="game163 smdn mddn" style="margin:0 auto"> <ul class="bigImg" style="position: relative; width: 400px; height: 276px;"> <li style="position: absolute; width: 400px; left: 0px; top: 0px; display: none;"> <a ><img src="http://www.yogaphilosopher.com/datacache/pic/800_536_bb2059a777d55ad2d98f62e3d1324b05.jpg"></a> </li> </ul> <div class="smallScroll"> <div class="smallImg"> <div class="tempWrap" style="overflow:hidden; position:relative; width:550px"><ul style="width: 880px; position: relative; overflow: hidden; padding: 0px; margin: 0px; left: -110px;"> <li class="" style="float: left; width: 100px;"><a><img src=" http://www.yogaphilosopher.com/datacache/pic/110_80_bb2059a777d55ad2d98f62e3d1324b05.jpg"></a></li> <li class="" style="float: left; width: 100px;"><a><img src=" http://www.yogaphilosopher.com/datacache/pic/110_80_bb2059a777d55ad2d98f62e3d1324b05.jpg"></a></li> </ul></div> </div> </div> </div> </div> </div> <div class="rmt20"> <div class="indestit r16">+ 更多詳情 +</div> <div class="sumpro rmt20 r14"> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">?工藝簡介 </p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">鈉鈣雙堿法脫硫工藝（Na2CO3/Ca(OH)2）是在石灰石/石膏法基礎上結合鈉堿法發展起來的工藝，它克服了石灰石/石膏法容易結垢、鈉堿法運行費用高的缺點。它利用鈉鹽易溶于水，在吸收塔內部采用鈉堿吸收SO2，吸收后的脫硫液在再生池內利用廉價的石灰進行再生，從而使得鈉離子循環吸收利用。 </p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">該工藝綜合石灰法與鈉堿法的特點，解決了石灰法的塔內易結垢的問題，且具備鈉堿法吸收效率高的優點。</p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">工藝特點</p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">與石灰石或石灰濕法脫硫工藝相比，雙堿法原則上有以下優點：</p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">1. 用鈉堿脫硫，循環水基本上是[Na+]的水溶液，在循環過程中對水泵、管道、設備均無腐蝕與堵塞現象，便于設備運行與保養；</p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">2. 吸收劑的再生和脫硫渣的沉淀發生在塔外，這樣避免了塔內堵塞和磨損，提高了運行的可靠性，降低了操作費用；</p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">3. 鈉基吸收液吸收SO2速度快，故可用較小的液氣比，達到較高的脫硫效率，一般在90%以上；</p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">工藝原理</p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">鈉鈣雙堿法[Na2CO3/Ca(OH)2]采用純堿或燒堿啟動，鈉堿吸收SO2、石灰再生的方法。其基本化學原理可分脫硫過程和再生過程： </p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">Ⅰ、脫硫過程 </p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">Na2CO3 + SO2 → Na2SO3 + CO2 (1)</p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">2NaOH + SO2 → Na2CO3 + H2O (2)</p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">Na2CO3 + SO2 + H2O → NaHSO3 (3)</p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">1. 式為吸收啟動反應式；</p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">2. 式為主要反應式，pH＞9（堿性較高時）</p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">3. 式為當堿性降低到中性甚至酸性時（5＜pH＜9）</p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">Ⅱ、再生過程 </p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">2NaHSO3 + Ca(OH)2 → Na2SO3 + +CaSO3↓ + 2H2O (5)</p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">Na2SO3 + Ca(OH)2 → 2NaOH + CaSO3↓ (6)</p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">在石灰漿液（石灰達到飽和狀況）中，中性（兩性）的NaHSO3很快跟石灰反應從而釋放出[Na+]，隨后生成的[SO32-]又繼續跟石灰反應，反應生成的亞硫酸鈣以半水化合物形式慢慢沉淀下來，從而使[Na+]得到再生，吸收液恢復對SO2的吸收能力，循環使用。 </p> <p style="margin: 5px 0px; font-family: sans-serif; font-size: 16px; text-indent: 2em;">脫硫副產物為亞硫酸鈣或硫酸鈣（氧化后），用戶可以根據自己的需要，采用不同的方法對副產品進行處理。</p> </div> </div> <div class="pageing rmt20 rmb20 r14"> <div class="fx pageinfli"> <div class="fx pageinflifl"> <div class="pageinfliflbor">上一條</div> <div class="ml10"> <a title="氧化鎂脫硫工藝" href="http://www.yogaphilosopher.com/article_read_105.html">氧化鎂脫硫工藝</a></div> </div> <div>查看詳情 +</div> </div> <div class="fx pageinfli"> <div class="fx pageinflifl"> <div class="pageinfliflbor">下一條</div> <div class="ml10"><a title="石灰石——石膏法" href="http://www.yogaphilosopher.com/article_read_107.html">石灰石——石膏法</a></div> </div> <div>查看詳情 +</div> </div> </div> </div> </div></div> <div class="layui-container"> <div class="rmt30 kstdbox"> <img 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