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含氯废气处理方法有哪些呢?_环保在线

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target="_self" class="active"><i class="hbzhan iconshoucang"></i>收藏</a></div>--> <span class="guanzhu gz-btn"><a href="javascript:void(0);" target="_parent" onclick="OpFollowMTSPUser()"></a></span> <span class="sc-btn shoucang"><a onclick="OpCollect()" target="_parent"></a></span> </div> <table class="describe"> <tr><td>资料类型</td><td class="tdStyle">jpg文件</td><td>资料大小</td><td class="tdStyle">169504</td></tr> <tr><td>下载次数</td><td class="tdStyle">57</td><td>资料图片</td><td class="tdStyle"> <a href="https://img80.hbzhan.com/1/20210528/637577965707073056707.jpg" target="_blank" class="look">【点击查看】</a></td></tr> <tr><td>上 传 人</td><td class="tdStyle">诸城市吉丰机械科技有限公司 </td><td>需要积分</td><td class="tdStyle">0</td></tr> <tr><td>关 键 词</td><td class="hotword" colspan="3">含氯废气处理设备,工业废气处理设备,废气净化设备,生物除臭设备,光氧催化设备</td></tr> </table> <span class="downloadIcon"><a href="https://img80.hbzhan.com/1/20210528/637577965707073056707.jpg" target="_blank" class="d-own"></a><span class="guanzhu gz-btn" ><a href="#" target="_self" onclick="OpFollowMTSPUser()" ></a></span> <script> const h1Tag = document.querySelector('h1'); if (h1Tag && h1Tag.textContent.includes('GB')) { const downloadIconSpan = document.querySelector('.downloadIcon'); const lookLink = document.querySelector('a.look'); if (lookLink) { lookLink.style.display = 'none'; } if (downloadIconSpan) { downloadIconSpan.style.display = 'none'; } } </script> <span class="shoucang sc-btn"><a onclick="OpCollect()"></a></span> </span> <dl> <dt>【资料简介】</dt> <dd><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">含氯废气主要包括氯气和氯化氢,氯气在人类生产、生活过程中用途非常广泛,特别是在化工生产的许多领域它都是重要的原料,但氯气又是有毒的,氯气有强烈的刺激性,高压下易溶于水而成*氯,生成次氯酸和盐酸。在化工、农药、医药及有色治金生产过程中均有氯气产出。在有机合成生产中氯化、氯磺化和氧氯化过程中,都排出大量含氯废气与氯化氢气体,造成对环境的污染。那么含氯废气处理方法有哪些呢?</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">治理含氯废气主要是根据氯的有关化学性质来选择吸收剂,并尽量把含氯废气资源化转化为有用物质。一般采用碱液中和法、或氯化亚铁吸收法、四氯化碳吸收法、水吸收法、吸附法等。</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">碱液中和法</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">碱液中和法即以碱液作为吸收液对氯气(Cl2)进行吸收,该方法是国内目前处理含氯废气的主要方法。常用的吸收剂有NaOH溶液、Na2C03溶液、石灰乳溶液[Ca( 0H)2]溶液等。吸收过程中,碱性吸收剂能使废气中的氯有效地转变为副产品一氯酸盐。反应机理为:</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">Cl2+2OH&mdash;►OCl+ Cl+H2O 或 Cl2 +CO3-&mdash;► OCl+ Cl+ CO2</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">只要有足够的OH或CO3,氯气的溶解和吸收就将继续进行下去,因而碱液吸收含氯废气一般有较高的效率,可达99.9%。碱液吸收设备采用填料塔或喷淋塔,吸收塔材料常采用硬聚氯乙烯或钢板衬橡胶。</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">吸收液的pH值随吸收过程而降低,而吸收液中次氯酸盐和金属氯化物的浓度却随吸收过程而升高。因此,吸收过程应控制一定的pH值和盐浓度,定期补充新鲜碱液,以避免吸收液结晶堵塞管道,或pH值过低影响吸收效率。</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">或氯化亚铁吸收法</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">该方法以氯化亚铁或作为吸收剂,依据氧化还原反应性质对氯气进行回收与净化。氯化亚铁对氯气的吸收化学反应如下:</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">Fe+2HCI&rarr;FeCI2 +H2&uarr;</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">2FeCI2 +CI2 &rarr;2FeCI3</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">2FeCI3+Fe&rarr;3FeCI2</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">其工艺设备可采用填料塔,并以废铁屑作填料,生产的FeCl3可作为防水剂,三价铁可被铁屑还原,再次参与吸收反应。该方法设备简单,操作容易,废铁屑来源丰富;但反应速度比中和法要慢,效率较低。</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">四氯化碳吸收法</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">当氯气浓度>1%时,可采用CCl4(四氯化碳)为吸收剂,其设备可采用喷淋或填充塔。</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">水吸收法</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">当氯气浓度<1%时,有时可用水通过喷淋塔来吸收氯气,其效果不如碱性中和法好,用水蒸气加热解吸时可回收氯气,如国内的一些氯碱厂在&ldquo;氯水&rdquo;解吸时用蒸气或热交换方法回收氯气。</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">吸附法</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;">工业上用于吸附含氯废气的吸附剂主要是活性炭和硅胶。活性炭对含氯废气中的光气、氯气将优先吸附,而对氮气、氧气等空气成分的吸附量比氯气少得多。一般在20℃下吸附,105℃下解吸。吸附法净化含氯废气的优点是无二次污染,氯回收率高达95%左右,解吸含氯废气经一次处理可得到液*产品。由于吸附容量有限,吸附法仅适用于含氯废气量不大或浓度不髙的场合。</span></span></span></p><p><span style="color:#000000;"><span style="font-size:16px;"><span style="font-family:宋体;"><img alt="" src="https://img77.hbzhan.com/2/20210412/637538314586998561412.jpg" style="width: 600px; height: 600px;" /></span></span></span></p></dd> </dl> <input type='hidden' id="CurrUserID" value=""> <input type='hidden' id="CurrCompanyID" value="28710"> <input type='hidden' id="CurrMTSPUserID" value=""> <input type='hidden' id="OpCollect_Title" value="含氯废气处理方法有哪些呢?"> <input type='hidden' id="OpCollect_OpareteType" value="1"> <input type='hidden' id="OpCollect_ObjectID" value="189275"> <input type='hidden' id="OpCollect_ObjectType" value="31"> <input type='hidden' id="OpCollect_PictureUrl" value=""> <script type="text/javascript" src="/js/Common.js?v=20220712" ></script> <script 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