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class="bds_qzone" data-cmd="qzone"></a> <a title="分享到新浪微博" href="#" class="bds_tsina" data-cmd="tsina"></a> <a title="分享到騰訊微博" href="#" class="bds_tqq" data-cmd="tqq"></a> <a title="分享到人人網" href="#" class="bds_renren" data-cmd="renren"></a> <a title="分享到微信" href="#" class="bds_weixin" data-cmd="weixin"></a> </div> <script>window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdPic":"","bdUrl":'http:///article/show/sid/697/id/455.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 id="gckskyy0k" class="text editor">　　余熱鍋爐的使用對整個生產過程中余熱的充分合理的回收利用，并進行工業(yè)發(fā)電，降低能耗，低碳環(huán)保，提高生產裝置綜合熱效率。另一方面，降低了污染，滿足環(huán)境保護的要求。因此，余熱鍋爐的正常運行，對正常生產起到至關重要的作用。<br /> 　　由于鍋爐的余熱回收利用是一個完整的循環(huán)過程，需要不同的裝置的組合作用，在實際運行中一些裝置會受到高溫煙氣的影響，受熱出現一些變化。如：<br /> 　　過熱器一般布置在煙氣溫度較高的地方，也是受煙氣沖刷磨損厲害的地方，管子經常出現爆管問題。一方面在蒸汽量品質及溫度有效控制的前提下，出現爆管主要的原因是管子受到沖刷磨損減薄、強度下降引起的。在高溫狀態(tài)下，對過熱器管子沖刷磨損相當厲害，因此考慮到鍋爐運行壽命（一般為15年），另一方面，如果蒸汽品質、蒸汽量得不到有效控制，過熱器同樣也會出現爆管現象。<br /> 　　蒸發(fā)器是余熱鍋爐主要的受熱面，大部分煙氣熱能在此得以回收利用，在實際運行過程中普遍存在以下問題：因吹灰而帶來的爐管破損，由于余熱鍋爐具有大量的換熱管束，而煙氣中或多或少含有一定量的灰份，隨著運行時間的推移，勢必導致管子的積灰，從而影響傳熱及煙氣的流動。<br /> 　　省煤器通常布置在煙道尾部，煙氣溫度較低，其用來降低排煙溫度，滿足環(huán)保要求。我們知道，由于煙氣中SO、CN-、O2等與管壁水汽形成的露點腐蝕，會造成局部管壁壁厚增厚，因而爆管噴射出來的高溫高壓水和蒸汽致使相鄰的管子大面積受損，而受損的管子噴射出來又以同樣方式影響其他管子，造成惡性循環(huán)。<br /> 　　小編：wxy<br /></div> <div id="gckskyy0k" class="page" style="clear:both;"> 上一條：<a href="http:///news/zhongxin/show457.html">余熱鍋爐的汽包作用</a><br> 下一條：<a href="http:///news/zhongxin/show453.html">余熱鍋爐的相關參數設置</a><br> </div> <h4 class="related"><span style="font-weight:bold;height:30px;line-height:30px;font-size:13px; color:#fff; padding-left:10px">相關資料</span></h4> <ul class="related-list"> <li><a target="_blank" title="余熱鍋爐的基本原理" 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