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href="/list/?2_1.html">公司動態</a></div> <h3>公司動態<s></s></h3> </div> <div class="content"> <div class="title">鍋爐低氮改造的方法和原理</div> <div class="mark"><span>發布時間：22-06-07</span><span>瀏覽次數：<i id="hits"><script src="/inc/AspCms_Visits.asp?id=445"></script></i></span></div> <div class="showContxt"> <p align="center"><p>鍋爐的低氮改造根本意義上來說是對鍋爐上的燃氣燃燒器進行低氮改造的。其實鍋爐低氮改造就是煙氣再循環技術是通過將部分鍋爐排煙重新引入爐膛，并同大然氣、空氣混合進行燃燒的一種降低氮氧化物的技術。運用煙氣再循環技術，鍋爐內部核心區的燃燒溫度降低，過量空氣系數保持不變，在鍋爐效率不降低的情況下，抑制了氮氧化物的生成，達到降低氮氧化物排放的目的。?為保證燃料完全燃燒，通常在保證燃燒所需的理論空氣量外，還需要供給一定比例的過量空氣，在保證燃燒熱效率的前提下取較小的過量空氣系數，以盡量降低煙氣中氧氣濃度，將能有效抑制NOx的生成。?當鍋爐高負荷運行時，通常增加鼓風機風量使爐溫升高，此時過量空氣系數以盡量降低煙氣中氧氣濃度，將能有效抑制NOx的生成。?當鍋爐高負荷運行時，通常增加鼓風機風量使爐溫升高，此時過量空氣系數！往往較大，爐溫很高，生成的NOx量很多。低氮鍋爐在高負荷狀態下平穩運行，同時控制爐膛溫度，可有效抑制NOx的生成。NOx氮氧化物是由于助燃空氣中的N2在高溫作用下氧化而生成，低氮改造可有效控制燃燒溫度在1000度以下，再輔以分級燃燒、煙氣內循環等技術，使得NOx氮氧化物的濃度大大降低。?燃氣鍋爐的關鍵部件是燃燒器，不穩定燃燒器循環效果差，不利于控制火焰溫度，易造成鍋爐熱效率流失。選用鍋爐低氮燃燒機，做到在燃燒過程中吸入爐膛的燃燒氣體以參與再循環，降低燃燒區域的氧氣濃度，以降低火焰溫度，達到減少氮氧化物量的目的。</p><script src="/inc/AspCms_VisitsAdd.asp?id=445"></script></p> </div> <div 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