濾(lv)筒(tong)(tong)(tong)(tong)除塵(chen)器(qi)(qi)以濾(lv)筒(tong)(tong)(tong)(tong)作為過濾(lv)元件所組成或采用脈沖(chong)噴吹的除塵(chen)器(qi)(qi)。 濾(lv)筒(tong)(tong)(tong)(tong)除塵(chen)器(qi)(qi)按安裝(zhuang)(zhuang)方式(shi)(shi)分(fen)(fen)，可以分(fen)(fen)為斜(xie)插(cha)式(shi)(shi)，側裝(zhuang)(zhuang)式(shi)(shi)，吊裝(zhuang)(zhuang)式(shi)(shi)，上(shang)裝(zhuang)(zhuang)式(shi)(shi)。 濾(lv)筒(tong)(tong)(tong)(tong)除塵(chen)器(qi)(qi)按濾(lv)筒(tong)(tong)(tong)(tong)材料分(fen)(fen)，可以分(fen)(fen)為長纖維(wei)聚(ju)酯濾(lv)筒(tong)(tong)(tong)(tong)除塵(chen)器(qi)(qi)，復合纖維(wei)濾(lv)筒(tong)(tong)(tong)(tong)除塵(chen)器(qi)(qi)，防靜電濾(lv)筒(tong)(tong)(tong)(tong)除塵(chen)器(qi)(qi)，阻燃濾(lv)筒(tong)(tong)(tong)(tong)除塵(chen)器(qi)(qi)，覆膜濾(lv)筒(tong)(tong)(tong)(tong)除塵(chen)器(qi)(qi)，納(na)米濾(lv)筒(tong)(tong)(tong)(tong)除塵(chen)器(qi)(qi)等。
濾(lv)(lv)筒式除(chu)(chu)(chu)塵(chen)(chen)器(qi)(qi)(qi)早在20世紀70年代就(jiu)已經在日本和歐美(mei)一些國家出現(xian)，具(ju)有(you)體(ti)積小，效率高，投資省，易維(wei)護(hu)等(deng)優點，但因其設備(bei)容量(liang)(liang)小，難組合成大風量(liang)(liang)設備(bei)，過濾(lv)(lv)風速(su)偏低(di)，應(ying)用范圍窄，僅(jin)在糧食、焊接等(deng)行業應(ying)用，所以多年來未能大量(liang)(liang)推廣。近(jin)年來，隨著新技術、新材料不斷地發展，以日本，美(mei)國的公司為(wei)代表，對除(chu)(chu)(chu)塵(chen)(chen)器(qi)(qi)(qi)的結構(gou)和濾(lv)(lv)料進行了改進，使得濾(lv)(lv)筒除(chu)(chu)(chu)塵(chen)(chen)器(qi)(qi)(qi)廣泛地應(ying)用于水泥(ni)、鋼鐵、電力、食品(pin)、冶金、化工(gong)(gong)等(deng)工(gong)(gong)業領域，整體(ti)容量(liang)(liang)增加數倍，成為(wei)過濾(lv)(lv)面(mian)積>2000m2大型除(chu)(chu)(chu)塵(chen)(chen)器(qi)(qi)(qi)（GB6719－86類），是解(jie)決傳統除(chu)(chu)(chu)塵(chen)(chen)器(qi)(qi)(qi)對超細粉塵(chen)(chen)收集難、過濾(lv)(lv)風速(su)高、清灰效果差、濾(lv)(lv)袋易磨損破(po)漏、運行成本高的上(shang)好(hao)方(fang)案(an)，和市場上(shang)現(xian)有(you)各種(zhong)袋式、靜電除(chu)(chu)(chu)塵(chen)(chen)器(qi)(qi)(qi)相比具(ju)有(you)有(you)效過濾(lv)(lv)面(mian)積大、壓差低(di)、低(di)排放、體(ti)積小、使用壽命(ming)長(chang)等(deng)特點，成為(wei)工(gong)(gong)業除(chu)(chu)(chu)塵(chen)(chen)器(qi)(qi)(qi)發展的新方(fang)向(xiang)。
濾筒式除塵(chen)器的結構是由進(jin)風(feng)管(guan)、排風(feng)管(guan)、箱(xiang)體(ti)、灰(hui)斗、清灰(hui)裝(zhuang)置(zhi)(zhi)、導流裝(zhuang)置(zhi)(zhi)、氣流分流分布(bu)板(ban)、濾筒及(ji)電控裝(zhuang)置(zhi)(zhi)組成(cheng)，類似氣箱(xiang)脈沖(chong)袋除塵(chen)結構。
濾筒在(zai)除塵(chen)器中的布(bu)置(zhi)很重要，既可(ke)以垂(chui)直布(bu)置(zhi)在(zai)箱(xiang)體花(hua)(hua)板上，也可(ke)以傾斜布(bu)置(zhi) 在(zai)花(hua)(hua)板上，從清(qing)灰效果看，垂(chui)直布(bu)置(zhi)較為合理。花(hua)(hua)板下部為過濾室，上部為氣箱(xiang)脈(mo)沖(chong)室。在(zai)除塵(chen)器入口處裝有氣流分布(bu)板。
含塵(chen)(chen)氣(qi)體(ti)進(jin)入除塵(chen)(chen)器灰(hui)斗后，由于氣(qi)流斷面突然擴大及氣(qi)流分布板作(zuo)用，氣(qi)流中一部分粗大顆粒(li)在動和慣性力作(zuo)用下(xia)沉降在灰(hui)斗；粒(li)度細、密度小的塵(chen)(chen)粒(li)進(jin)入濾塵(chen)(chen)室后，通(tong)過布朗擴散和篩濾等組合效(xiao)應(ying)，使粉塵(chen)(chen)沉積在濾料表面上，凈化后的氣(qi)體(ti)進(jin)入凈氣(qi)室由排(pai)氣(qi)管(guan)經風機排(pai)出。
濾(lv)(lv)(lv)筒式(shi)除塵(chen)器的(de)(de)阻(zu)力隨濾(lv)(lv)(lv)料表面粉塵(chen)層厚度的(de)(de)增加而增大。阻(zu)力達到某一(yi)規定值時(shi)進(jin)行清(qing)(qing)灰(hui)(hui)。此時(shi)PLC程序控(kong)制脈沖(chong)閥(fa)(fa)的(de)(de)啟閉，首(shou)先一(yi)分室提升(sheng)閥(fa)(fa)關(guan)閉，將過濾(lv)(lv)(lv)氣流截斷，然后電(dian)磁(ci)(ci)脈沖(chong)閥(fa)(fa)開(kai)(kai)啟，壓縮(suo)空氣以及短的(de)(de)時(shi)間在(zai)上(shang)箱(xiang)體內迅速膨脹，涌(yong)入濾(lv)(lv)(lv)筒，使(shi)濾(lv)(lv)(lv)筒膨脹變形產生振動，并在(zai)逆向氣流沖(chong)刷的(de)(de)作用下，附著在(zai)濾(lv)(lv)(lv)袋(dai)外表面上(shang)的(de)(de)粉塵(chen)被剝離(li)落入灰(hui)(hui)斗中。清(qing)(qing)灰(hui)(hui)完畢后，電(dian)磁(ci)(ci)脈沖(chong)閥(fa)(fa)關(guan)閉，提升(sheng)閥(fa)(fa)打開(kai)(kai)，該室又(you)恢復過濾(lv)(lv)(lv)狀態(tai)。清(qing)(qing)灰(hui)(hui)各室依次進(jin)行，從一(yi)室清(qing)(qing)灰(hui)(hui)開(kai)(kai)始至下一(yi)次清(qing)(qing)灰(hui)(hui)開(kai)(kai)始為一(yi)個清(qing)(qing)灰(hui)(hui)周期。脫落的(de)(de)粉塵(chen)掉(diao)入灰(hui)(hui)斗內通過缷灰(hui)(hui)閥(fa)(fa)排出。
在此過(guo)(guo)程(cheng)中必須(xu)定(ding)期對濾(lv)筒進(jin)行更換和清洗，以確保過(guo)(guo)濾(lv)效果(guo)和精度，因為在過(guo)(guo)濾(lv)過(guo)(guo)程(cheng)中粉塵除了被阻隔(ge)外(wai)還(huan)有(you)部分會沉積于濾(lv)料表(biao)面(mian)，增大阻力，所以一(yi)般(ban)的(de)正確更換時(shi)間是(shi)三至五個月！
