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title="1639559459177979.jpg" alt="thumb_20190613171144_864.jpg"/></span></p><p style="line-height: 1.5em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";">1、煙氣再循環改造(超低氮)</span></p><p style="line-height: 1.5em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";">一種是利用助燃空氣的壓頭，把部分燃燒煙氣吸回，進入燃燒器，與空氣混合燃燒。由于煙氣再循環，燃燒煙氣的熱容量大，燃燒溫度降低，NOx減少。</span></p><p style="line-height: 1.5em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";">另一種自身再循環燃燒器是把部分煙氣直接在燃燒器內進入再循環，并加入燃燒過程，此種燃燒器有抑制氧化氮和節能雙重效果。</span></p><p style="line-height: 1.5em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";">2、全預混燃燒機(表面燃燒)</span></p><p style="line-height: 1.5em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";">全預混燃氣燃燒技術，是將燃氣和空氣在進入燃燒室之前進行充分的預混合，使燃燒更充分，提高燃燒效率和降低有害氣體排放，同時也可降低燃燒室的空間需求，是目前國際上先進的一種燃氣燃燒技術。</span></p><p style="line-height: 1.5em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";">由于鍋爐低氮燃燒改造方式多樣，技術復雜，為了保障改造工作的順利實施，有效防范安全風險，預防事故發生，經專家分析論證，綜合安全、環保影響因素，北京質量技術監督局和北京市環境保護局聯合下發通知：</span></p><p style="line-height: 1.5em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";">(一)對于7.0mw(蒸發量10t/h)以上的在用鍋爐，不建議采用預混燃燒的改造方式。</span></p><p style="line-height: 1.5em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";">(二)對于中心回燃鍋爐，不建議采用更換燃燒器的改造方式。</span></p><p style="line-height: 1.5em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";">(三)對于在用鍋爐，不建議采用直接改造燃燒器的改造方式。</span></p><p style="line-height: 1.5em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei";">因此在鍋爐低氮技術改造過程中，更多的時候，是將原有燃氣鍋爐直接替換為低氮鍋爐。</span></p><p><br/></p></div> <h3 class="tag">本文網址：http://www.13425690000.com/news/548.html </h3> <h3 class="tag">關鍵詞：<a href="http://www.13425690000.com/tag/%E4%BD%8E%E6%B0%AE%E7%87%83%E6%B0%94%E9%94%85%E7%82%89%E6%94%B9%E9%80%A0">低氮燃氣鍋爐改造</a>,<a href="http://www.13425690000.com/tag/%E5%B0%BE%E6%B0%94%E5%9C%A8%E7%BA%BF%E7%9B%91%E6%B5%8B">尾氣在線監測</a>,<a href="http://www.13425690000.com/tag/%E7%83%AD%E5%8A%9B%E8%8A%82%E8%83%BD%E6%94%B9%E9%80%A0">熱力節能改造</a> </h3> <div class="page">上一篇：<a 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