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href="http://www.estampauctions.com">www.estampauctions.com</a> 【<a href="javascript:self.close()">關閉</a>】 <span style="float:left;">分享: </span> <span> <script>window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdPic":"","bdUrl":'http://www.estampauctions.com/article/show/sid/1067/id/376.html',"bdStyle":"0","bdSize":"16"},"share":{}};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)];</script> </span> </div> <ul style=" margin:10px 0px;"> </ul> <div class="text editor"><p> <span style="font-size:14px;">　　現在脫硝技術很多，但催化劑是SCR脫硝反應中的核心物質，對催化反應的脫硝效率有重要影響。以下是詳細介紹。</span> </p> <p style="text-align:center;"> <span style="font-size:14px;"><img src="/Upload/thumb_62970f8234ae4.jpg" width="400" height="533" title="SCR脫硝" alt="SCR脫硝" /><br /> </span> </p> <span style="font-size:14px;">　　基于對SCR脫硝反應的理解，催化劑，作為重要的反應物，對整個它的反應有著重要的影響，既解決了反應需要，又提高了脫硝質量，使整個它的反應符合實際要求，提高了脫硝效果。根據特點和催化劑在催化劑，的實際表現，了解催化劑的重要指標，根據SCR脫硝反應合理應用催化劑，對催化劑的應用和催化效果的提升具有重要意義。</span><br /> <span style="font-size:14px;">　　工藝指標包括脫硝效率、SO2/SO3轉化率、NH3逃逸率、壓降等反映催化劑活性的綜合性能指標。一般催化劑成品完成后，需要在實驗室實際煙氣條件下對這些指標進行測試，確認各項指標符合要求。</span><br /> <span style="font-size:14px;">　　1.SCR脫硝效率是指進入反應器前后煙氣中NOx的質量濃度之差除以反應器入口前NOx的濃度(濃度均換算成相同的氧含量)，直接反映了催化劑NOx的脫除效率，一般情況下，脫硝工程會設計初始脫硝率和遠期脫硝率。通過設置和預留若干催化劑層，未來將逐層增加，以滿足未來日益嚴格的排放要求。</span><br /> <span style="font-size:14px;">　　2.SO2/SO3轉化率是指煙氣中SO2與SO3的比值。SO2/SO3的轉化率越高，催化劑，的活性越好，所需的催化劑量越少。但轉化率過高會導致空氣預熱器堵灰和后續設備腐蝕，還會導致催化劑中毒。因此，一般要求SO2/SO3的轉化率小于1%。在釩鈦催化劑中添加鎢、鉬等成分，可以有效一直SO2轉化為SO3。</span><br /> <span style="font-size:14px;">　　3.NH3逃逸率催化劑反應器出口處的煙氣中NH3的體積分數反映了未反應的NH3。如果數值高，一是會增加生產成本，造成NH3的二次污染；其次，NH3與煙氣中的SO3反應生成NH4HSO4和(NH4)2SO4等物質，會腐蝕下游設備，增加系統的阻力。</span><br /> <span style="font-size:14px;">　　4.壓降煙氣通過催化劑層后的壓力損失。整個脫硝系統的壓降由催化劑，壓降、反應器壓降和煙道壓降等組成。這種壓降應盡可能小，否則將直接影響鍋爐主機和引風機的運行。在催化劑的設計中合理選擇催化劑的孔徑和結構是降低催化劑本身壓降的重要手段。</span><br /> <span style="font-size:14px;">　　以上就是SCR脫硝的催化劑的工藝性能指標，相信您對它的催化也有了一定的了解，想要了解更多的相關內容繼續關注我們。</span><br /> <span style="font-size:14px;">小編：suger</span><br /></div> <div class="page" style="clear:both;"> 上一條： <a href="http://www.estampauctions.com/hyzx/hyzx/show378.html">脫硝設備之危險廢棄物如何解決</a> <br> 下一條： <a href="http://www.estampauctions.com/hyzx/hyzx/show375.html">脫硝設備是脫除煙氣中的氮氧化物</a> <br> </div> <h4 class="related"><span style="font-weight:bold;height:30px;line-height:30px;font-size:13px; padding-left:10px">SCR脫硝相關資料</span></h4> <ul class="related-list"> <li><a target="_blank" title="scr脫硝的工作原理" href="http://www.estampauctions.com/hyzx/zyzs/show301.html">scr脫硝的工作原理</a></li><li><a target="_blank" title="scr脫硝的還原劑選擇" href="http://www.estampauctions.com/hyzx/gsdt/show304.html">scr脫硝的還原劑選擇</a></li><li><a target="_blank" title="scr脫硝催化劑是什么" 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