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<a href="#" class="bds_more" data-cmd="more"></a> <a title="分享到QQ空間" href="#" 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(wǎng)" 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/438.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="6q7iqyvaz" class="text editor">　　<strong><a href="http:///" target="_blank">余熱鍋爐</a></strong>利用工業(yè)生產(chǎn)過(guò)程中的氣體或廢氣、廢液，以及某些動(dòng)力機(jī)械排氣的熱量產(chǎn)生蒸汽或熱水的鍋爐。<br /> 　　余熱鍋爐是重要的節(jié)能設(shè)備，由于“余熱”種類的多樣性從而使余熱鍋爐的結(jié)構(gòu)形式各式各樣，不盡相同。如，各種冶煉爐和焙燒窯的排煙溫度為650～1250℃；燃?xì)廨啓C(jī)和柴油機(jī)等動(dòng)力機(jī)械的排氣溫度為370～540℃。安裝余熱鍋爐吸收這些排煙中的部分熱量，全系統(tǒng)的熱能利用率可以顯著提高。例如軋鋼加熱爐安裝余熱鍋爐后，全系統(tǒng)熱能利用率甚至可提高1倍左右。<br /> 　　進(jìn)入余熱鍋爐的煙氣溫度，是決定余熱鍋爐受熱面布置形式的一個(gè)重要因素。如進(jìn)口煙氣溫度為400～900℃時(shí)，鍋爐內(nèi)主要設(shè)置對(duì)流管束，不設(shè)置爐室；但煙塵熔化點(diǎn)低時(shí)也有例外，應(yīng)設(shè)置冷卻爐室以控制進(jìn)入對(duì)流煙道的入口煙的溫度，避免灰渣在對(duì)流管排間搭橋。<br /> 　　在化工生產(chǎn)的裂解工藝中，為避免高溫裂解氣體的重新聚合，需要將高溫裂解氣體急速冷卻到裂解反應(yīng)停止的溫度，這時(shí)余熱鍋爐就成為不可缺少的急冷工藝設(shè)備。<br /> 　　大型燃機(jī)電廠采用三壓再熱循環(huán)余熱鍋爐，汽水系統(tǒng)主要由低壓、中壓、高壓三部分組成，可同時(shí)產(chǎn)生低壓過(guò)熱蒸汽、中壓過(guò)熱蒸汽、高壓過(guò)熱蒸汽，分別驅(qū)動(dòng)低壓汽輪機(jī)、中壓汽輪機(jī)、高壓汽輪機(jī)，可充分地把燃?xì)獾臒崮苻D(zhuǎn)換成機(jī)械功。<br /> 　　低壓部分由低壓省煤器、低壓汽包、低壓蒸發(fā)器、低壓過(guò)熱器組成。從凝結(jié)水泵來(lái)的冷水，通過(guò)低壓省煤器預(yù)熱后輸入低壓汽包，汽包下面連接著蒸發(fā)器，水在低壓蒸發(fā)器內(nèi)加熱成飽和蒸汽上升到低壓汽包。飽和蒸汽從低壓汽包輸出再通過(guò)低壓過(guò)熱器加熱，產(chǎn)生低壓過(guò)熱蒸汽，用來(lái)驅(qū)動(dòng)低壓蒸汽輪機(jī)旋轉(zhuǎn)做功。<br /> 　　小編：wxy<br /></div> <div id="6q7iqyvaz" class="page" style="clear:both;"> 上一條：<a href="http:///news/zhongxin/show440.html">可利用余熱的來(lái)源</a><br> 下一條：沒(méi)有了<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(guān)資料</span></h4> <ul class="related-list"> <li><a target="_blank" title="可利用余熱的來(lái)源" href="http:///news/zhongxin/show440.html">可利用余熱的來(lái)源</a></li><li><a target="_blank" title="余熱鍋爐的壓力等級(jí)" href="http:///news/zhongxin/show441.html">余熱鍋爐的壓力等級(jí)</a></li><li><a target="_blank" title="余熱發(fā)電應(yīng)用" href="http:///news/zhongxin/show446.html">余熱發(fā)電應(yīng)用</a></li><li><a target="_blank" title="余熱鍋爐煙道安裝設(shè)計(jì)" 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