濾袋破損90%以上破損原因都在這里 - 行業新聞 - 鹽城市大千環?？萍加邢薰?/title> <meta name="keywords" content="鹽城市大千環?？萍加邢薰?> <meta name="description" content="濾袋破損90%以上破損原因都在這里濾袋作為布袋除塵器的心臟，對布袋除塵器的使用效果起到決定性的作用。尤其高溫濾袋在整個除塵器中的所占 "> <link href="static/css/style.css" rel="stylesheet" type="text/css" /> <script type="text/javascript" src="static/js/nsw_index.js"></script> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">  <script src="https://cdn.jsdelivr.net/npm/jquery@1.12.4/dist/jquery.min.js"></script>  <script src="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/js/bootstrap.min.js"></script> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> </head> <body> <div style="position:fixed;left:-9000px;top:-9000px;"><menu id="wm68x"></menu><nobr id="wm68x"><tr id="wm68x"></tr></nobr><u 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/> 手機：13851080511 <br /> 傳真：86 0515 8855232 <br /> 網址：daqianhuanbao.com <br /> 地址：江蘇省鹽城市建湖縣上岡鎮上岡產業園園區大道緯二路 <br /> </div> </div> </div> <script type="text/javascript"> $('.zhilan:first').css('display','dlock'); </script> <div class="rightframe"> <div class="maincont"> <div class="head"> <p>行業新聞</p> <span>網站當前位置：網站首頁 > 行業新聞</span> </div> <div class="rightframe"> <div class="content1"> <div class="proshow"> <ul> <li class="prtitle">濾袋破損90%以上破損原因都在這里</li> <li class="prtent"> <div><span style="font-size:16px;">濾袋破損90%以上破損原因都在這里</span></div> <div><span style="font-size:16px;">濾袋作為布袋除塵器的心臟，對布袋除塵器的使用效果起到決定性的作用。尤其高溫濾袋在整個除塵器中的所占價值比例很大，保護好濾袋，防止濾袋由于各種原因破損，一方面，可以保證過濾效果，滿足排放濃度；另一方面，可以減少經濟損失，保證整個設備的穩定運行。</span></div> <div> </div> <div><span style="font-size:16px;">一、濾袋破損類型</span></div> <div> </div> <div><span style="font-size:16px;">1、機械破損</span></div> <div> </div> <div><span style="font-size:16px;">主要表現為濾料無紡層磨破，脫落，這種現象是由于氣流分布不均勻，粉塵在高過濾風速下對濾袋表面的沖刷造成的；或者由于濾袋安裝不到位，導致濾袋之間的摩擦而破損；或者噴吹管安裝不垂直，導致口部30-40公分的范圍出現破洞，失去過濾性能。</span></div> <div><span style="font-size:16px;">具體表現在濾袋口部破損、濾袋袋身破損、濾袋下部破損、濾袋底部破損。</span></div> <div><span style="font-size:16px;">（1）除塵濾袋袋口部位</span></div> <div> </div> <div><span style="font-size:16px;">濾袋袋口部位破損多在袋口向下30-40公分以內，多表現為濾料底層吹破、脫落。多為壓縮空氣過高、噴吹管歪斜、花板變形等原因造成，在安裝過程中要注意安裝的質量。</span></div> <div> </div> <div><span style="font-size:16px;">▲袋口受噴吹和粉塵沖刷影響的環狀破損</span></div> <div><span style="font-size:16px;">（2）濾袋袋身位置</span></div> <div><span style="font-size:16px;">濾袋和骨架接觸部分長期由于脈沖噴吹導致接觸部分磨損，表現為很明顯的橫豎筋條方向磨損痕跡。要注意濾袋和骨架的尺寸配合、除塵骨架表面的光潔度等。</span></div> <div> </div> <div><span style="font-size:16px;">▲袋口部位受噴吹系統影響導致濾袋由內向外破損</span></div> <div> </div> <div><span style="font-size:16px;">（3）濾袋底部破損</span></div> <div> </div> <div><span style="font-size:16px;">濾袋底部現象磨損較為常見，可能由于袋籠底部過小或濾袋過長，袋籠只能制撐袋底局部。濾袋清灰和過濾時動作過大造成濾袋底內側磨損?；蛘叻蹓m堆積過高形成渦流磨損濾袋。</span></div> <div> </div> <div><span style="font-size:16px;">▲左：濾袋底部受氣流沖刷破損</span></div> <div> </div> <div><span style="font-size:16px;">▲右：濾袋底部和縫紉線受氣流沖刷破損</span></div> <div> </div> <div><span style="font-size:16px;">2、化學腐蝕</span></div> <div> </div> <div><span style="font-size:16px;">化學腐蝕較明顯的表現是除塵布袋的強度大幅下降，具體表現在酸腐蝕，堿腐蝕，氧化腐蝕和水解腐蝕等導致濾袋失去可以承受的過濾負荷，從而失去過濾性能。</span></div> <div> </div> <div><span style="font-size:16px;">這種現象主要由于濾袋的選型存在問題或者使用工況環境超越了纖維的承受范圍，導致濾袋失去過濾性能而失效。</span></div> <div> </div> <div><span style="font-size:16px;">（1）酸腐蝕</span></div> <div> </div> <div><span style="font-size:16px;">高溫濾料一般存在酸腐蝕，以硫氧化物為主。尤其是在燃煤鍋爐電廠的煙氣除塵中，采用高硫煤，而且電袋結合項目，煙氣中硫氧化物含量高，可以達到5000mg/Nm3。</span></div> <div> </div> <div><span style="font-size:16px;">在高溫環境下，硫氧化物形成亞硫酸、硫酸，對濾料造成酸腐蝕而失效。如煙氣中含有HF，則不能采用玻璃纖維類濾料，易酸腐蝕造成濾料失效。</span></div> <div> </div> <div><span style="font-size:16px;">一般控制煙氣運行溫度在酸露點以上即可，如低于酸露點溫度必須關閉除塵器系統，避免腐蝕濾袋。酸性液體還有鹽酸、硫酸、硝酸、氫氟酸等。</span></div> <div><span style="font-size:16px;">（2）堿腐蝕</span></div> <div><span style="font-size:16px;">多出現在鈉鹽和氨類化工生產工藝除塵中，例如氯化鈉、氨水、碳酸鈉等工況。對于電廠、水泥廠、垃圾焚燒廠、鋼鐵廠等領域的煙氣除塵出現較少。</span></div> <div> </div> <div><span style="font-size:16px;">（3）氧化腐蝕</span></div> <div> </div> <div><span style="font-size:16px;">氧化腐蝕指的是存在一定量氧化性物質的時候對濾料造成的損壞，主要為PPS類濾料的氧化腐蝕，可以對PPS類濾料造成氧化損壞的有氮氧化物、氧氣、臭氧、濃硫酸等。</span></div> <div> </div> <div><span style="font-size:16px;">表現為PPS纖維變為深色且變脆，外觀完好無損，但是強度急劇下降，只有200N左右，接近濾料使用壽命的末期，失去過濾效果。</span></div> <div> </div> <div><span style="font-size:16px;">（4）水解</span></div> <div> </div> <div><span style="font-size:16px;">水解的定義是水分子介入纖維的高分子而引起分解的一種化學反應。以縮聚型聚合體生產的合成纖維是不耐水解的。包括：聚酯、聚酰亞胺（P84）、NOMEX、COMEX。</span></div> <div><span style="font-size:16px;">高溫、濕度及化學品這三種因素必須存在才能激活水解。聚丙烯腈均聚體、PPS纖維、PTFE纖維不是產自縮聚型聚合體，常選來取代有水解問題的纖維。</span></div> <div> </div> <div><span style="font-size:16px;">水解痕跡多為纖維顏色混濁，濾袋強力嚴重下降、用手可輕易撕破，縫紉線水解后斷裂，無強力。</span></div> <div> </div> <div><span style="font-size:16px;">3、高溫燒灼</span></div> <div> </div> <div><span style="font-size:16px;">高溫燒灼的表現主要有濾袋由于高溫導致收縮劇烈，嚴重硬化，甚至濾袋表面出現破洞，主要原因為濾袋使用的工況條件中溫度超出濾袋的承受范圍，導致出現這種現象。</span></div> <div> </div> <div><span style="font-size:16px;">具體為高溫的顆粒、高溫的煙氣、濾袋高溫熱收縮過大等造成濾料的損傷。</span></div> <div> </div> <div> </div> <div> </div> <div><span style="font-size:16px;">▲高溫顆粒引起濾袋燙穿燒損</span></div> <div> </div> <div><span style="font-size:16px;">4、結露阻塞</span></div> <div> </div> <div><span style="font-size:16px;">所謂結露，通俗地講，是指含濕空氣在一定的氣壓和溫度下，析出飽和水分的現象。析出水分的溫度點稱之為露點。</span></div> <div><span style="font-size:16px;">飽和狀態下氣體壓力越高，則露點越低?？諝庵袧窈吭礁?，則露點溫度越高。當空氣中的濕含量一定，含濕空氣溫度低于該露點溫度時，過飽和空氣中就會析出水分，即產生結露現象；當空氣溫度高于該露點時則不會析出水分，也就不會產生結露現象。另外，煙氣中如含有SO2成分，則SO2含量越多，煙氣的露點越高。</span></div> <div><span style="font-size:16px;">由于濾袋使用工況環境中水分大，與粉塵粘接在濾袋的表面，濾袋表面的微孔堵塞，導致設備運行阻力高，濾袋失去過濾性能。</span></div> <div><span style="font-size:16px;">具體原因如下：</span></div> <div><span style="font-size:16px;">（1）除塵器存在漏風現象</span></div> <div><span style="font-size:16px;">由于除塵器存在漏風現象，將外界大量的冷空氣吸進除塵器內，使除塵器局部空氣溫度急劇下降，空氣中的水分析出，從而產生結露現象。</span></div> <div><span style="font-size:16px;">（2）煙氣中的含濕量過高</span></div> <div><span style="font-size:16px;">當處理的煙氣中含濕量過高，過飽和的水分析出，則產生結露現象。這種現象在水泥干法線的窯尾除塵器上尤其突出，由于水泥干法線窯尾的煙氣一般采用增濕塔進行冷卻調質處理，當所噴的水量過大，造成煙氣中的水分產生過飽和現象時就會產生結露。</span></div> <div><span style="font-size:16px;">（3）煙氣溫度過低</span></div> <div> </div> <div><span style="font-size:16px;">除塵器處理的煙氣本身溫度接近或低于露點溫度時，也會產生結露。</span></div> <div><span style="font-size:16px;">（4）水分進入除塵器</span></div> <div><span style="font-size:16px;">由于“四管爆裂”現象，導致水分進入除塵器，造成濾袋表面結露、糊袋現象。</span></div> <div> </div> </li> <li class="next"> 　　上一張：<a href="http://www.brightonapartments.net/show-16-30-1.html">除塵布袋安裝過程中常見問題及預防措施</a><br> 　　下一張：<a href="javascript:alert('最后一頁');">最后一頁</a> </li> </ul> </div> </div> </div> </div> <div class="clear"></div> </div> </div> <div class="clear"></div> ? <div class="foot"> <div class="dh"> <ul> <li><a href="index.asp">網站首頁</a></li> <li><a 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