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id="jxbselstxovh" class="ny_xinwen"></div> <script> $(function(){ $.ajax({ type: "POST", url: "http://m.network168.cn/home/public/viewNum.html", data: "module=article&id=225", success: function(msg){ $('#hitnum').text(msg); } }); }) </script> <div class="jxbselstxovh" id="page_main2" class="clearfix"> <div id="jxbselstxovh" class="site-nav2"> <div id="jxbselstxovh" class="site_left"><span>當(dāng)前位置 : </span><a href="http://m.network168.cn/">主頁</a> >><a href="http://m.network168.cn/xinwen/xwzx/">公司新聞</a> >><a href="http://m.network168.cn/xinwen/">新聞中心</a> </div> <div id="jxbselstxovh" class="site_right"><span></span></div> <div id="jxbselstxovh" class="clear"></div> </div> <div id="jxbselstxovh" class="page-right2"> <div class="jxbselstxovh" id="shownews"> <h1 class="title">鍋爐燃料油流量調(diào)節(jié)系統(tǒng)</h1> <div id="jxbselstxovh" class="hits"> 點擊次數(shù)：<span id="hitnum"></span> 更新時間：23/12/16 10:05:12 來源：<a href="http://m.network168.cn">m.network168.cn</a> 【<a href="javascript:self.close()">關(guān)閉</a>】 <span style="float:left;">分享: </span> <span> <script>window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdPic":"","bdUrl":'http://m.network168.cn/article/show/sid/1217/id/225.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="jxbselstxovh" class="text editor">　　鍋爐燃料油的一個流量調(diào)節(jié)系統(tǒng)，流量指示出現(xiàn)上下波動現(xiàn)象，不僅僅是測量問題，還有系統(tǒng)問題。將調(diào)節(jié)器由自動切換成手動，看流量指示變化情況。如流量指示仍然上下波動，說明是測量系統(tǒng)問題。如流量指示不波動，說明是調(diào)節(jié)系統(tǒng)的問題,可以通過改變P、I、D參數(shù)重新整定調(diào)節(jié)系統(tǒng)，但有時這種辦法不能解決問題。<br /> <p> 　　針對鍋爐燃料油流量指示出現(xiàn)上下波動故障現(xiàn)象，分析其原因，導(dǎo)壓管保溫系統(tǒng)的保溫棉外面沒有防濕措施，保溫層淋濕，熱量損失，使導(dǎo)壓管內(nèi)重油粘度增加，壓力傳遞阻力增加，反應(yīng)滯后。也就是說，測量滯后增加。從物理意義上講，壓力傳遞阻力增加，反應(yīng)遲滯，孔板兩側(cè)的壓差變化不能及時傳到變送器上，使調(diào)節(jié)器不能對流量變化的信號進行調(diào)節(jié)。如流量指示稍有下降，出現(xiàn)偏差，調(diào)節(jié)器隨即反應(yīng)，輸出一個調(diào)節(jié)信號，增加調(diào)節(jié)閥開度，流量很快達到設(shè)定值,現(xiàn)在測量出現(xiàn)滯后，流量變化了，但調(diào)節(jié)器不能立即做出反應(yīng)，流量繼續(xù)變化，待調(diào)節(jié)器做出反應(yīng)時，流量已大大地超過工藝指標(biāo)，再進行反向調(diào)節(jié)，由于滯后太大而出現(xiàn)流量過小，這樣反復(fù)不止，使系統(tǒng)指示上下波動。由于測量滯后過大，僅改變P、I、D參數(shù)不能克服。 </p> 　　應(yīng)打開鍋爐燃料油保溫蒸汽，使導(dǎo)壓管溫度上升，重油粘度降低，克服測量滯后，流量指示不再上下波動，恢復(fù)正常，停止保溫伴熱蒸汽，在原保溫棉基礎(chǔ)上，加油氈，防止雨水。<br /></div> <div id="jxbselstxovh" class="page" style="clear:both;"> 上一條： <a href="http://m.network168.cn/xinwen/xwzx/show227.html">鍋爐燃料油維護哪些部件？</a> <br> 下一條： <a href="http://m.network168.cn/xinwen/xwzx/show223.html">小技巧：環(huán)保燃料油泄露處理方法</a> <br> </div> <h4 class="related"><span style="font-weight:bold;height:30px;line-height:30px;font-size:13px; 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