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class="xypg-detail-title">煙氣脫硝的基本介紹</h1> <div class="xypg-detail-info-bar"> <div class="detail-info-time"><i class="icon-font icon-shijian"></i>2022-04-18 15:13:57</div> <div class="detail-info-numbers"><i class="icon-font icon-chakan"></i><script src="http://www.choimail.com/source/include/browse.php?model=news&id=569"></script>次</div> </div> <div class="xypg-detail-con"><p style="line-height: 2em; text-indent: 2em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">隨著工業生產的不斷發展和人民生活水平的提高，大氣污染成為人們關注的重要問題。大氣污染中的一大問題是氮氧化物NOX的污染，為此各國開始了對煙氣脫硝工程的研究和建設。在陽光的作用下，NOX會發生光化學反應，形成光化學煙霧，從而造成大氣污染。七十年代以來，人們越來越重視NOX對大氣的污染問題，人們發現：低濃度NOX會影響許多方面，如人體健康、硝酸雨、光化學煙霧、臭氧不斷減少等一些方面，而且其危害比人們預計的要大得多。美國和日本對于NOX排放的問題考慮的較多，日本早已制定了嚴格的NOX排放標準。同時，日本采取很多技術措施，如在以煤和油為燃料的鍋爐上配備消除NOX的設備。</span></p><p style="line-height: 2em; text-indent: 2em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">煙氣脫硝，指的是把已形成的NOX還原成N2，從而除掉煙氣中的NOX，按工藝不同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。國內外的一些研發人員還研究出了利用微生物來處理NOX廢氣的技術。</span></p><p style="line-height: 2em; text-indent: 2em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">燃燒系統排放的煙氣中的NOx，90%以上是NO,而NO很難溶解到水中,因此濕法處理NOx不能僅僅用洗滌法。O3氧化吸收法是用O3將NO氧化成NO2,之后用水吸收。但該法會生成HNO3液體，此液體需要經過濃縮技術處理,而且制取O3需要高電壓,因此初期的投資及運行費用較高。ClO2氧化還原法是用ClO2將NO氧化成NO2,然后用Na2SO3水溶液將NO2還原成N2。該法可以和用NaOH作脫硫劑的濕法脫硫技術一起使用,脫硫的產物Na2SO3又可作為NO2的還原劑。此法的脫硝效率可達95%,且脫硝的同時也進行了脫硫,但ClO2和NaOH的價格較高,使成本增加。</span></p><p><br/></p><p style="text-align: center;"><img src="/data/upload/202204/1650266012805317.png" title="煙氣脫硫脫硝" alt="煙氣脫硫脫硝" width="439" height="318" border="0" vspace="0" style="width: 439px; height: 318px;"/></p><p><br/></p><p style="line-height: 2em; text-indent: 2em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 16px;">文章內容來源于網絡，如有問題請和我聯系刪除！</span></p><p><br/></p></div> <div class="xypg-detail-tags"> <div 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