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class='key_tag'><font><strong>脫硫脫硝塔</strong></font></a>工作原理，是指把已生成的NOX還原為N2，<a href='http://www.nailsartideas.com/product/700.html' target='_blank' class='key_tag'><font><strong>脫硫塔</strong></font></a>從而脫除煙氣中的NOX，按治理工藝可分為濕法脫硝和干法脫硝。主要包括：酸吸收法、堿吸收法、選擇性催化還原法、非選擇性催化還原法、吸附法、離子體活化法等。國內外一些科研人員還開發了用微生物來處理NOX廢氣的方法。</p><p><br/></p><p style="text-indent: 2em;">要看你選擇的技術種類是什么：常規來說火電廠都是選擇爐外SCR脫硝高塵布置+電（袋式或者是電袋）除塵+濕法脫硫，如果是這種組合那么樓上的說的是對的，脫硝是布置在省煤器和空預器之間，除塵布置在空預器和引風機之間，脫硫布置在引風機和煙囪之間。</p><p style="text-indent: 2em;">但不排除有例外情況，比如干法脫硫、爐內SNCR脫硝技術、爐外SCR脫硝低塵布置等等，脫硝和脫硫設施有可能會與常規布置在除塵器的上游或下游相反的位置。還有就是現在為了控制PM2.5，濕式除塵逐漸會推廣應用，順序有可能又不同。不過上述這些情況都屬于特殊情況，只是作為一個補充說明，應用較多的還是常規布置順序。</p><p style="text-indent: 2em;"> </p><p style="text-indent: 2em;">先是脫硝裝置，布置在在鍋爐尾部過熱器--除塵（通常是兩套除塵，先是電除塵，后是布袋）--脫硫（效果較好的一般是濕法脫硫）</p><p><br/></p><p style="text-indent: 2em;">過程為：脫硝（在鍋爐尾部過熱器后）--除塵（在鍋爐尾部煙道）--脫硫（在除塵器后）</p><p><img src="/data/upload/202002/1582872453867658.png" title="脫硫塔" alt="脫硫塔" width="640" height="640" border="0" vspace="0" 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