欧美在线观看网址综合_除塵濾布粉塵層和表面過(guò)濾應用原理解析-江蘇世財環(huán)?？萍加邢薰?/title> <meta name="keywords" content="江蘇世財環(huán)?？萍加邢薰?> <meta name="description" content="江蘇世財環(huán)?？萍加邢薰局饕a(chǎn)品：高溫復合纖維針刺氈；耐中、高溫濾袋系列；氟美斯濾袋系列；抗靜電、抗結露、覆膜濾袋系列；（聚脂）滌綸濾袋、美塔斯濾袋、PPS濾袋、P84濾袋、亞克力濾袋、（PTFE）聚四氟乙烯濾袋；玻璃纖維高溫過(guò)濾布(袋)、玻璃纖維膨體過(guò)濾布（袋）、玻璃纖維針刺氈；垃圾焚燒濾袋系列；袋籠、環(huán)、帽等除塵器配件系列。"> <link href="/Public/Home/default/css/common.css" rel="stylesheet" type="text/css" /> <link href="/Public/Home/default/css/mycss.css" rel="stylesheet" type="text/css" /> <script src="/Public/Home/default/js/jquery-1.12.4.min.js" type="text/javascript"></script> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head> <body> <h1><a href="http://www.jymlp.com/">久久久婷婷成人综合激情,国产一精品一aⅴ一免费,久久人人97超碰国产精品,久久国产精品亚洲Av无码四区</a></h1> <div class="pl_css_ganrao" style="display: none;"><tbody id="e4m04"><strong 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class="zxxq-sour"> <span> 作者：江蘇世財環(huán)?？萍加邢薰?/span> <span>點(diǎn)擊：705 </span> <span> 發(fā)布日期：2022年07月15日 </span> </div> <div id="eiew0ey" class="zxxq-text"> <div id="iiewoew" class="zxxq-text-t1"> 信息摘要： </div> <div id="egwawqo" class="zxxq-text-t2">除塵濾布粉塵層和表面過(guò)濾應用原理解析煙氣與粉塵從濾布表面滲透穿過(guò)，同時(shí)用某種方法來(lái)清除灰塵，前述的兩種作用取得平衡后，在濾布的內層（毛氈層）形成了厚度為0.5--0.7mm，由灰塵和濾布纖維交纏成的層，這稱(chēng)為內層過(guò)濾層，相當于前述平紋織物的一次過(guò)濾層。</div> <div id="goeg00g" class="clear"></div> </div> <div id="w0mi4qg" class="primgpic"><img src="/uploads/img1/20220720/62d799d858c9d.jpg" /></div> <div id="40a6maa" class="zxxq-desc endit-content"><p>　　除塵濾布粉塵層和表面過(guò)濾應用原理解析煙氣與粉塵從濾布表面滲透穿過(guò)，同時(shí)用某種方法來(lái)清除灰塵，前述的兩種作用取得平衡后，在濾布的內層（毛氈層）形成了厚度為0.5--0.7mm，由灰塵和濾布纖維交纏成的層，這稱(chēng)為內層過(guò)濾層，相當于前述平紋織物的一次過(guò)濾層。</p><p>　　粉塵層過(guò)濾機理：</p><p>　　在濾料纖維的過(guò)濾機理中，如擴散、重力、慣性碰撞、靜電等作用對粉塵層都是存在的，但主要的是篩分作用。在袋式除塵器開(kāi)始運轉時(shí)，新的濾袋上沒(méi)有粉塵，運行數分鐘后在濾袋表面形成很薄的塵膜。由于濾袋是用纖維織造成的，所以在粉塵層未形成之前，粉塵會(huì )在擴散等效應的作用下逐漸形成粉塵在纖維間的架橋現象。濾袋纖維直徑一般為20一1005mm。針刺氈纖維直徑多為10-205um。纖維間的距離多為10-305um，架橋現象很容易出現。架橋現象完成后的0.3-0.5mm的粉塵層常稱(chēng)為塵膜或一次粉塵層。在一次粉塵層上面再次堆積的粉塵稱(chēng)二次粉塵層。</p><p>　　平紋織物濾布本身的除塵效率為85%一90%，效率比較低。但戛面澆布表面粉塵附著(zhù)堆積時(shí)，可得到99.5%以上的高除塵效率。因而有必要在清除粉塵之后，使濾布表面殘留0.3-0.5mm厚的粉塵層，以防止除塵效率下降。問(wèn)題在于除塵器運行過(guò)程中如何完成使次粉塵層保留，而僅僅清除第二次粉塵層，這個(gè)問(wèn)題對設計制造廠(chǎng)來(lái)說(shuō)既是技術(shù)問(wèn)題，又是一種處置經(jīng)驗。因此可以說(shuō)袋式除塵器的歷史，是循序漸進(jìn)不斷完善的歷史?；诜蹓m層對效率的影響，所以在粉塵層剝落部分除塵效率急劇下降;同時(shí)，由于壓力損失減少，煙氣在這部分集中流過(guò)。因此，幾秒鐘后濾布表面又形成了粉塵層，除塵效率又上升了，即每一清除周期可排出一定量的粉塵。</p><p>　　另一方面，若過(guò)濾風(fēng)速設計得當，到了濾布表面過(guò)濾層有一定的壓力損失（常為1000一1500Pa），即在所需的時(shí)間內過(guò)濾層達到一定的厚度時(shí)，時(shí)間與過(guò)濾風(fēng)速成反比。取過(guò)濾風(fēng)速為n倍，所需時(shí)間為1/n，每小時(shí)必須清除粉塵層的次數至少為n倍，實(shí)際上必須考慮清除所需的時(shí)間（10一30s），應取n十倍。另外，采用非織布型針刺氈作為濾布，一般可采用1.5一2.5mm厚度，這一層相當于前所述及的一次粉塵層，它存在于濾布的內層。</p><p>　　煙氣與粉塵從濾布表面滲透穿過(guò)，同時(shí)用某種方法來(lái)清除灰塵，前述的兩種作用取得平衡后，在濾布的內層（毛氈層）形成了厚度為0.5--0.7mm，由灰塵和濾布纖維交纏成的層，這稱(chēng)為內層過(guò)濾層，相當于前述平紋織物的一次過(guò)濾層。然而煙氣重新在濾布表面上堆積而成為二次粉塵層。這樣內過(guò)濾層同纖維交織在一起，與二次粉塵層相比其性質(zhì)大為不同，所以清除的僅僅是二次粉塵層，內過(guò)濾層易于完全保留，因而清除粉塵后的除塵效率不會(huì )下降。粉塵在濾布上的附著(zhù)力是非常強的，當過(guò)濾速度為0.28m/min時(shí)，直徑105m的粉塵粒子在濾料上的附著(zhù)力可以達到粒子自重的1000倍，55m的粉塵粒子在濾料上的附著(zhù)力可以達到粒子自重的4200倍。所以在濾袋清灰之后，粉塵層會(huì )繼續存在。粉塵層的存在，使過(guò)濾過(guò)程中的篩分作用大大加強，過(guò)濾效率也隨之提高。粉塵層形成的篩孔比濾料纖維的間隙小得多，其篩分效果顯而易見(jiàn)。</p><p>　　粉塵層的形成與過(guò)濾速度有關(guān)，過(guò)濾速度較高時(shí)粉塵層形成較快;過(guò)濾速度很低時(shí)，粉塵層形成較慢。如果單純考慮粉塵層的過(guò)濾效果，’過(guò)濾速度低未見(jiàn)得有利。粉塵層繼續加厚時(shí)，必須及時(shí)用清灰的方法去除，否則會(huì )形成阻力過(guò)高，或者粉塵層的自動(dòng)降落，從而導致粉塵間的“漏氣”現象，降低捕集粉塵的效果。</p><p>　　表面過(guò)濾機理：</p><p>　　基于粉塵層形成有利于過(guò)濾的理論，人為地在普通濾料表面覆上一層有微孔的薄膜以提高除塵效果。所以過(guò)濾表面的薄膜又稱(chēng)人造粉塵層。為了控制對不同粒子的捕集效率，不同用途的微孔表面薄膜其微孔孔徑是變化的。如，過(guò)濾普通粉塵時(shí)，微孔孔徑通常小于25um;過(guò)濾細菌時(shí)，孔徑小于0.35um;過(guò)濾病毒時(shí)，孔徑小于0.055um。這種區別像篩孔一樣，根據篩上篩下的耍求，選用不同篩孔的篩網(wǎng)。</p><p>　　表面過(guò)濾的薄膜可以覆在普通濾料表面，也可以覆在塑燒板的表面。日前濾布上覆的薄膜都是采用氟乙烯膜，底布類(lèi)型達20多種，薄膜卻只有一種，薄膜的厚度在8-30um左右，各廠(chǎng)家產(chǎn)品略有不同。 </p></div> <div id="ykmgyqk" class="clear"></div> <dl class="news_page clearfix"> <dt class="pagepre"> 上一篇：<a 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