濾(lv)(lv)(lv)(lv)筒(tong)(tong)(tong)(tong)除(chu)(chu)塵(chen)器(qi)以(yi)濾(lv)(lv)(lv)(lv)筒(tong)(tong)(tong)(tong)作(zuo)為過濾(lv)(lv)(lv)(lv)元件所組成或采(cai)用脈(mo)沖噴吹的除(chu)(chu)塵(chen)器(qi)。 濾(lv)(lv)(lv)(lv)筒(tong)(tong)(tong)(tong)除(chu)(chu)塵(chen)器(qi)按(an)安裝方式分(fen)(fen)(fen)，可(ke)以(yi)分(fen)(fen)(fen)為斜插式，側裝式，吊裝式，上裝式。 濾(lv)(lv)(lv)(lv)筒(tong)(tong)(tong)(tong)除(chu)(chu)塵(chen)器(qi)按(an)濾(lv)(lv)(lv)(lv)筒(tong)(tong)(tong)(tong)材料(liao)分(fen)(fen)(fen)，可(ke)以(yi)分(fen)(fen)(fen)為長(chang)纖維聚酯濾(lv)(lv)(lv)(lv)筒(tong)(tong)(tong)(tong)除(chu)(chu)塵(chen)器(qi)，復合纖維濾(lv)(lv)(lv)(lv)筒(tong)(tong)(tong)(tong)除(chu)(chu)塵(chen)器(qi)，防靜電(dian)濾(lv)(lv)(lv)(lv)筒(tong)(tong)(tong)(tong)除(chu)(chu)塵(chen)器(qi)，阻燃濾(lv)(lv)(lv)(lv)筒(tong)(tong)(tong)(tong)除(chu)(chu)塵(chen)器(qi)，覆(fu)膜濾(lv)(lv)(lv)(lv)筒(tong)(tong)(tong)(tong)除(chu)(chu)塵(chen)器(qi)，納(na)米濾(lv)(lv)(lv)(lv)筒(tong)(tong)(tong)(tong)除(chu)(chu)塵(chen)器(qi)等。
濾筒式除(chu)塵(chen)(chen)器早(zao)在(zai)20世紀(ji)70年(nian)代就已經在(zai)日(ri)本和歐美(mei)一(yi)些國家(jia)出現(xian)，具有體積小，效率高(gao)，投(tou)資(zi)省，易維(wei)護等(deng)(deng)優點，但因其設備(bei)(bei)容(rong)量小，難組(zu)合成大(da)(da)(da)風(feng)(feng)量設備(bei)(bei)，過濾風(feng)(feng)速偏低，應(ying)(ying)用(yong)范圍(wei)窄，僅在(zai)糧食、焊(han)接等(deng)(deng)行(xing)業應(ying)(ying)用(yong)，所以多年(nian)來未能大(da)(da)(da)量推廣。近年(nian)來，隨著新技術、新材料不斷地(di)發(fa)展，以日(ri)本，美(mei)國的公司(si)為代表，對除(chu)塵(chen)(chen)器的結構(gou)和濾料進行(xing)了改進，使得濾筒除(chu)塵(chen)(chen)器廣泛地(di)應(ying)(ying)用(yong)于(yu)水泥(ni)、鋼鐵、電力、食品、冶金(jin)、化(hua)工(gong)等(deng)(deng)工(gong)業領域，整(zheng)體容(rong)量增加數倍，成為過濾面(mian)積>2000m2大(da)(da)(da)型除(chu)塵(chen)(chen)器（GB6719－86類），是解決傳統除(chu)塵(chen)(chen)器對超細粉塵(chen)(chen)收集(ji)難、過濾風(feng)(feng)速高(gao)、清(qing)灰效果差(cha)、濾袋(dai)易磨(mo)損破漏、運行(xing)成本高(gao)的上好(hao)方案，和市場上現(xian)有各(ge)種袋(dai)式、靜(jing)電除(chu)塵(chen)(chen)器相比(bi)具有有效過濾面(mian)積大(da)(da)(da)、壓(ya)差(cha)低、低排放、體積小、使用(yong)壽命長(chang)等(deng)(deng)特點，成為工(gong)業除(chu)塵(chen)(chen)器發(fa)展的新方向。
濾筒式(shi)除塵器的結(jie)構是由進(jin)風(feng)管、排風(feng)管、箱體、灰(hui)斗、清灰(hui)裝置、導流(liu)裝置、氣流(liu)分流(liu)分布板、濾筒及電控裝置組成，類似氣箱脈沖袋除塵結(jie)構。
濾(lv)筒在(zai)除(chu)塵器(qi)中(zhong)的布置(zhi)很重要(yao)，既可以垂直布置(zhi)在(zai)箱體花板上，也可以傾(qing)斜布置(zhi) 在(zai)花板上，從清(qing)灰效(xiao)果(guo)看，垂直布置(zhi)較為(wei)合(he)理。花板下(xia)部為(wei)過濾(lv)室(shi)，上部為(wei)氣箱脈(mo)沖室(shi)。在(zai)除(chu)塵器(qi)入口處裝有氣流分布板。
含(han)塵(chen)氣體(ti)進(jin)入除塵(chen)器灰(hui)(hui)斗(dou)后，由于氣流(liu)斷面(mian)突(tu)然(ran)擴大(da)及氣流(liu)分布板作用，氣流(liu)中(zhong)一部(bu)分粗大(da)顆粒在(zai)(zai)動和慣性力作用下沉(chen)降在(zai)(zai)灰(hui)(hui)斗(dou)；粒度(du)細(xi)、密(mi)度(du)小的(de)塵(chen)粒進(jin)入濾(lv)塵(chen)室后，通過布朗擴散(san)和篩(shai)濾(lv)等組合效(xiao)應，使粉塵(chen)沉(chen)積在(zai)(zai)濾(lv)料表面(mian)上，凈(jing)化后的(de)氣體(ti)進(jin)入凈(jing)氣室由排(pai)氣管經風機排(pai)出。
濾(lv)筒(tong)式除塵(chen)(chen)器的阻力(li)隨濾(lv)料表面粉(fen)(fen)塵(chen)(chen)層(ceng)厚度的增(zeng)加而增(zeng)大。阻力(li)達(da)到某(mou)一規定值時(shi)進行清(qing)灰(hui)(hui)(hui)。此時(shi)PLC程序控制(zhi)脈(mo)沖(chong)(chong)(chong)閥的啟(qi)閉(bi)(bi)，首(shou)先一分室提(ti)(ti)升(sheng)閥關閉(bi)(bi)，將過濾(lv)氣(qi)(qi)流(liu)截斷，然后電(dian)磁(ci)脈(mo)沖(chong)(chong)(chong)閥開(kai)啟(qi)，壓縮空氣(qi)(qi)以及短的時(shi)間(jian)在上箱體內迅(xun)速膨脹，涌入(ru)濾(lv)筒(tong)，使濾(lv)筒(tong)膨脹變形產生振動，并在逆向氣(qi)(qi)流(liu)沖(chong)(chong)(chong)刷的作用(yong)下，附著在濾(lv)袋外表面上的粉(fen)(fen)塵(chen)(chen)被剝離落入(ru)灰(hui)(hui)(hui)斗(dou)(dou)中。清(qing)灰(hui)(hui)(hui)完畢后，電(dian)磁(ci)脈(mo)沖(chong)(chong)(chong)閥關閉(bi)(bi)，提(ti)(ti)升(sheng)閥打開(kai)，該室又恢復過濾(lv)狀態。清(qing)灰(hui)(hui)(hui)各室依次進行，從一室清(qing)灰(hui)(hui)(hui)開(kai)始至下一次清(qing)灰(hui)(hui)(hui)開(kai)始為一個清(qing)灰(hui)(hui)(hui)周期(qi)。脫落的粉(fen)(fen)塵(chen)(chen)掉入(ru)灰(hui)(hui)(hui)斗(dou)(dou)內通(tong)過缷灰(hui)(hui)(hui)閥排出。
在(zai)此過程中(zhong)必(bi)須定期對(dui)濾(lv)筒進行更換和(he)清洗，以(yi)確(que)保過濾(lv)效果和(he)精度，因為(wei)在(zai)過濾(lv)過程中(zhong)粉塵除了被阻隔外還有部分會沉積(ji)于(yu)濾(lv)料表面，增大阻力，所以(yi)一(yi)般的正確(que)更換時(shi)間(jian)是三至五個(ge)月！
