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</div> <div id="lmw1mi7ee" class="art-body"> <p style="text-align:justify"><span style="font-family:微軟雅黑,sans-serif">濾袋是袋式除塵器的核心部件，其材質多為高分子合成纖維，隨著企業(yè)工況的復雜化與對環(huán)保要求的嚴格化，復雜煙氣的處理需求越來越大，因其成分的復雜性往往易對濾袋造成機械損傷、氧化腐蝕、酸結露腐蝕和高溫損傷等，影響其使用壽命。</span></p><p style="text-align:justify"> </p><p style="text-align:justify"><strong><span style="font-family:微軟雅黑,sans-serif"> 機械損傷：</span></strong><span style="font-family:微軟雅黑,sans-serif">包括籠骨對濾袋的磨損、噴吹氣流對濾袋的磨損、濾袋迎塵面磨損、濾袋堵塞。</span></p><p style="text-align:justify"><strong><span style="font-family:微軟雅黑,sans-serif"> 籠骨對濾袋的磨損</span></strong><span style="font-family:微軟雅黑,sans-serif">主要原因為籠骨結構改變，籠骨彎曲，加劇對濾袋磨損并可能造成濾袋間的磨損;邊緣鋒利或接口處理不當，對濾袋造成磨損、破壞；籠骨尺寸與濾袋不匹配，太小則無法撐起濾袋，太大則造成濾袋磨損;防腐處理不佳，因腐蝕變得粗糙的表面會對濾袋造成嚴重磨損。綜上，可在布袋生產過程中對易磨損處進行加厚，在籠骨生產中將邊緣及接口修整平滑，籠骨尺寸需與濾袋匹配，使用過程中及時對結構改變、破損、腐蝕的籠骨進行調整或更換。</span></p><p style="text-align:justify"><strong><span style="font-family:微軟雅黑,sans-serif"> 噴吹氣流對濾袋的磨損</span></strong><span style="font-family:微軟雅黑,sans-serif">主要原因為噴吹壓力過高、次數(shù)過多，增加了清灰氣流對濾袋的沖擊，若因此造成初始粉塵層脫落則清灰效率下降，且此時清灰易造成濾袋織物結構松散，加速磨損；用于清灰的壓縮空氣未進行油水分離，則易出現(xiàn)糊袋、板結現(xiàn)象，造成濾袋堵塞，使過濾和清灰阻力升高，嚴重時可引起濾袋破裂;噴吹管歪斜、花板變形使噴吹位置不當，不能有效清灰的同時易使濾袋磨損。因此，需及時維護變形花板，檢查噴吹管位置，確保噴吹口對正濾袋口中心并合理調整噴吹壓力。對清灰用壓縮空氣進行嚴格油水分離。設定清灰周期時以能保證除塵器工作在穩(wěn)定的壓力下清灰周期長為好，以能保證初始粉塵層不脫落的情況下清灰時間短為好，若初始粉塵層不足，可延長清灰周期以補償。</span></p><p style="text-align:justify"><strong><span style="font-family:微軟雅黑,sans-serif"> 濾袋迎塵面磨損</span></strong><span style="font-family:微軟雅黑,sans-serif">主要原因為孔板間距設計過于密集使濾袋間距離過小，易碰撞磨損;花板變形或籠骨未垂直安裝，造成濾袋底部擠碰、摩擦或與箱體摩擦從而破損;灰斗卸灰不及時，粉塵堆積過高，揚塵形成渦流氣旋磨損濾袋;煙氣中磨蝕性強的粉塵含量較高，加劇粉塵對濾袋的磨損;氣流分布不均，除導致部分濾袋被告訴氣流沖刷磨損外也會造成氣旋與二次揚塵，對濾袋造成沖擊與加劇磨損。因此設計時花板孔間距需適當，安裝過程中避免使用尖銳工具，確?；\骨與濾袋垂直安裝，避免碰撞現(xiàn)象。若花板變形則需及時維修或者更換，及時對灰斗進行卸灰。對磨蝕性強粉塵含量較高的煙氣，應合理設計過濾風速與進氣方式，合理設計設備內氣流分布使之盡量均勻。</span></p><p style="text-align:justify"><strong><span style="font-family:微軟雅黑,sans-serif"> 濾袋堵塞</span></strong><span style="font-family:微軟雅黑,sans-serif">主要原因為過濾速度過大，濾袋處理煙氣量過大，而清灰周期及時間仍為過濾速度正常時的設定，造成清灰不及時，濾袋逐漸堵塞;粉塵過細，滲入濾袋纖維內部，造成堵塞;粉塵中粘性大的成分較多，使粉塵在濾袋表面粘結從而堵塞;設備密封不嚴、進風管破損、保溫效果不佳等因素造成空氣進入除塵器，或除塵器工作溫度低于酸露點，造成糊袋、板結，堵塞濾袋。因此需保證除塵器密封性，檢查并排除漏風情況。確保廢氣室與凈氣室的隔離密閉。做好除塵器的保溫工作。</span></p><p style="text-align:justify"><span style="font-family:微軟雅黑,sans-serif"> </span></p><p style="text-align:justify"><strong><span style="font-family:微軟雅黑,sans-serif"> 化學腐蝕：</span></strong><span style="font-family:微軟雅黑,sans-serif">包括氧化腐蝕、酸結露腐蝕。</span></p><p style="text-align:justify"><span style="font-family:微軟雅黑,sans-serif"> 煙氣中NO<sub>2</sub>、SO<sub>2</sub>、O<sub>2</sub>等氧化性成分在高溫下會對高分子纖維濾料造成氧化腐蝕。若煙氣中氧氣含量較高，則會提高SO<sub>2</sub>生成SO<sub>3</sub>的轉化率，酸露點溫度上升，此外NO<sub>2</sub>含量大時易結露生成濃硝酸，對濾袋造成腐蝕。這種情況應將煙氣含氧量控制在8%以下，利用預處理、預涂層等技術盡可能減少設備內酸性氣體。</span></p><p style="text-align:justify"><span style="font-family:微軟雅黑,sans-serif"> </span></p><p style="text-align:justify"><strong><span style="font-family:微軟雅黑,sans-serif">高溫損傷</span></strong></p><p style="text-align:justify"><span style="font-family:微軟雅黑,sans-serif">濾袋的高溫損傷主要原因為濾料出廠前未經過熱收縮處理，或煙氣溫度超出濾袋使用溫度，使濾袋發(fā)生熱收縮而無法抽出或被籠骨漲破；煙氣中含高溫顆粒，造成濾袋灼傷;投油助燃時未開啟除塵器旁路，火星隨煙氣進入除塵器將濾袋灼燒損壞，或可燃油星殘留在濾袋表面被高溫氣體引燃，灼傷濾袋。因此應嚴格控制煙氣溫度，規(guī)范操作設備，防止高溫顆粒及可燃油星進入過濾箱體。</span></p><p> </p> </div> <div id="lmw1mi7ee" class="art-next"> <dl class="shangxia"> <dd>上一篇：<a href="/Article-500399.html">廢氣排氣筒（煙囪）是否規(guī)范，滿足環(huán)保局要求？23個行業(yè)高度要求</a> </dd> <dd>下一篇：<a href="/Article-505364.html">催化燃燒的組成及原理</a> </dd> </dl> </div> </div> </div> </div> </div> </div> <div class="lmw1mi7ee" id="clear"></div>  <div id="lmw1mi7ee" class="g_ft f_fw"> <div id="lmw1mi7ee" class="w1200 f_pr"> <div id="lmw1mi7ee" class="m_fnav "> <a href="/">網(wǎng)站首頁</a> <a href="/aboutus.html">關于我們</a> <a href="/products.html">產品展示</a> <a href="/news.html">新聞資訊</a> <a href="/article.html">技術文章</a> <a href="/honor.html">榮譽資質</a> <a href="/order.html">在線留言</a> <a href="/contact.html">聯(lián)系我們</a></div> <div id="lmw1mi7ee" class="f_ftcon"> 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