久久精品嫩草影院免费看_布袋除塵器粉塵層過(guò)濾機理 - 新聞中心 - 浙江鼎力環(huán)?？萍加邢薰?/title> <meta name="keywords" content="浙江鼎力環(huán)?？萍加邢薰?> <meta name="description" content="在布袋除塵器開(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—100μm;針刺氈纖維直徑多為10—20μm.纖維間的距離多為10--30μm,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."> <link rel="stylesheet" type="text/css" href="/App/Home/View/Default/Public/js/bootstrap/css/bootstrap.min.css" /> <link rel="stylesheet" href="/App/Home/View/Default/Public/css/animate.css"> <script src="/App/Home/View/Default/Public/js/wow.min.js" type="text/javascript"></script> <script src="/App/Home/View/Default/Public/js/jquery.js"></script> <script type="text/javascript" src="/App/Home/View/Default/Public/js/jquery.jslides.js"></script> <link rel="stylesheet/less" type="text/css" href="/App/Home/View/Default/Public/css/skrles.less"> <script src="/Public/layer/layer.js" 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</script> </div> <div id="bdbd5pz" class="main"> <div id="hx5xnfz" class="main2"> <div class="jrdpfpd" id="Mright"> <div id="vjvh5l9" class="article info-1"> <div id="zxlp5xn" class="title"><h4>新聞中心</h4><span id="9tlvfv5" class="right">您現在的位置：<a href="/">首頁(yè)</a> > 新聞中心</span></div> <div id="zhldn9r" class="block-1"> <div id="xjdphjl" class="title" style="text-align: center;"> <h2>布袋除塵器粉塵層過(guò)濾機理<br><small>發(fā)布時(shí)間：2020-05-18 瀏覽：2648次</small></h2> </div> <div id="9f5j55r" class="con"><p>在布袋除塵器開(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—100μm;針刺氈纖維直徑多為10—20μm.纖維間的距離多為10--30μm,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％--90％,效率比較低.但是在濾布表面粉塵附著(zhù)堆積時(shí)．可得到99．5％以上的高除生效率.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)題是在防塵器運行過(guò)程中,如何完全使***次粉塵層保留,而僅僅清除第二次粉塵層,這個(gè)問(wèn)題對設汁和制造廠(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)布袋除塵器的歷史,就是循序漸進(jìn)不斷完善的歷史.基于粉塵層對效率的影響,所以在粉塵層剝落部分,防塵效率就急劇廠(chǎng)降.同時(shí)由于壓力損失減少,煙氣就在這部分集中流過(guò).因此幾秒鐘后濾布表面又形成了粉塵層,防塵效率又上升了,即每一清除周期可排出一定量的粉塵.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l000--1500Pa),即在所需的時(shí)間內過(guò)濾層達到一定的厚度時(shí),這時(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l／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t(10一30s),應取n+t倍.</p><p>另外采用非織布型針刺氈作為濾布,一般可采用1.5--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.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(毛氈型)就形成了厚度為0.5--0.7mm,由灰塵和濾布纖維交纏而成的層,這就稱(chēng)為內層過(guò)濾層,相當于前述平紋織物的一次過(guò)濾層.然而煙塵重新在濾布表面上堆積而成為二次粉塵層.</p><p>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)濾層就易于完全保留.因而清除粉塵后的防塵效率就不會(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／3時(shí)直徑為10μm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．5μm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)得是有利的.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,從而導致粉塵層問(wèn)的“漏氣”現象,降低捕集粉塵的效果.</p></div> <ul id="prev_next"> <li><a href="/news/4_4"><span>上一篇：袋式除塵器行業(yè)的市場(chǎng)發(fā)展</span></a></li> <li style="text-align: right;"><a href="javascript:;"><span>下一篇：沒(méi)有了</span></a></li> <div id="vxb5rvn" class="clear2"></div> </ul> </div> </div> </div> <div id="bjvlxnz" class="clear2"></div> </div> </div> <div id="fn5bjx5" class="footer"> <div id="hxlx5hp" class="footer_head"> <div id="tp5hvzj" class="footer_head_h"> <a href="/index">網(wǎng)站首頁(yè)</a>?。? <a href="/company">公司簡(jiǎn)介</a>?。? <a 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