電(dian)(dian)(dian)(dian)(dian)袋復合(he)除塵(chen)器(qi)工作時含塵(chen)氣(qi)流(liu)通過預荷電(dian)(dian)(dian)(dian)(dian)區，塵(chen)粒帶電(dian)(dian)(dian)(dian)(dian)。荷電(dian)(dian)(dian)(dian)(dian)粒子(zi)隨氣(qi)流(liu)進(jin)入過濾段(duan)被纖維(wei)層捕集。塵(chen)粒荷電(dian)(dian)(dian)(dian)(dian)可(ke)(ke)以(yi)是正電(dian)(dian)(dian)(dian)(dian)荷，也可(ke)(ke)以(yi)為負(fu)電(dian)(dian)(dian)(dian)(dian)荷。濾料可(ke)(ke)以(yi)加電(dian)(dian)(dian)(dian)(dian)場，也可(ke)(ke)以(yi)不加電(dian)(dian)(dian)(dian)(dian)場，若加電(dian)(dian)(dian)(dian)(dian)場，可(ke)(ke)加與(yu)(yu)塵(chen)粒極性(xing)相同的電(dian)(dian)(dian)(dian)(dian)場，也可(ke)(ke)加與(yu)(yu)塵(chen)粒極性(xing)相反的電(dian)(dian)(dian)(dian)(dian)場，如果加異(yi)性(xing)電(dian)(dian)(dian)(dian)(dian)場則粉(fen)塵(chen)在(zai)濾袋附(fu)著力強，不易清灰(hui)。

實(shi)驗表(biao)明，加(jia)同性極性電場，效果更好些，原因(yin)是極性相同時(shi)，電場力(li)與流向排斥，塵(chen)粒不易透過纖維(wei)層(ceng)，表(biao)現為(wei)表(biao)面(mian)過濾，濾料內部較潔凈；同時(shi)由于(yu)排斥作用，沉(chen)積于(yu)濾料表(biao)面(mian)的粉塵(chen)層(ceng)較疏松，過濾阻力(li)減(jian)小，使清灰變得更容易些。電袋復合(he)式除(chu)塵(chen)器是綜合(he)利(li)用和有機結合(he)電除(chu)塵(chen)器與布袋除(chu)塵(chen)器的(de)優點(dian)，先有電場捕集(ji)煙氣中大(da)量(liang)的(de)大(da)顆粒的(de)粉塵(chen)，能(neng)夠收集(ji)煙氣中70%-80%以上的粉塵(chen)(chen)量，再(zai)結(jie)合后者布袋收集剩(sheng)余細(xi)微粉塵(chen)(chen)的一種(zhong)組合式高效除塵(chen)(chen)器，具有除塵(chen)(chen)穩定(ding)、排(pai)放濃度(du)≤50mg/m3（標(biao)）、性能優(you)異的特點。

但是，電(dian)(dian)袋(dai)復合除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)(chen)器(qi)并(bing)不是電(dian)(dian)除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)(chen)器(qi)和(he)布(bu)(bu)袋(dai)除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)(chen)器(qi)的(de)(de)(de)簡單組合疊加(jia)，實(shi)際上科技工作(zuo)者攻(gong)克了很多難題(ti)才(cai)使這兩種不同原理的(de)(de)(de)除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)(chen)技術相(xiang)結合。起(qi)初(chu)要解決(jue)在(zai)(zai)同一臺除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)(chen)器(qi)內同時(shi)滿(man)足電(dian)(dian)除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)(chen)和(he)布(bu)(bu)袋(dai)除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)(chen)工作(zuo)條件的(de)(de)(de)問題(ti)；其(qi)次(ci)，如何實(shi)現兩種除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)(chen)方(fang)式連接后袋(dai)除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)(chen)區各個濾(lv)(lv)袋(dai)流量和(he)粉塵(chen)(chen)(chen)(chen)(chen)濃度均布(bu)(bu)，提(ti)高(gao)布(bu)(bu)袋(dai)過(guo)濾(lv)(lv)風速，并(bing)且(qie)有(you)效降低(di)電(dian)(dian)袋(dai)復合式除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)(chen)器(qi)系統阻(zu)力。在(zai)(zai)除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)(chen)機理上，通過(guo)荷電(dian)(dian)粉塵(chen)(chen)(chen)(chen)(chen)使布(bu)(bu)袋(dai)的(de)(de)(de)過(guo)濾(lv)(lv)特(te)性發生變化(hua)，產(chan)生新的(de)(de)(de)過(guo)濾(lv)(lv)機理，利用荷電(dian)(dian)粉塵(chen)(chen)(chen)(chen)(chen)的(de)(de)(de)氣溶膠(jiao)效應，提(ti)高(gao)濾(lv)(lv)袋(dai)過(guo)濾(lv)(lv)效率，保(bao)護濾(lv)(lv)袋(dai)；在(zai)(zai)除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)(chen)器(qi)內部(bu)結構采用氣流均布(bu)(bu)裝置和(he)降低(di)整體設備阻(zu)力損(sun)失的(de)(de)(de)氣路系統；開(kai)發出超大規模脈(mo)沖噴吹技術和(he)電(dian)(dian)袋(dai)自動控制檢(jian)測故障識別及安全保(bao)障系統等。

電(dian)袋復合式除塵(chen)器(qi)分為(wei)兩(liang)級(ji)，前(qian)級(ji)為(wei)電(dian)除塵(chen)區，后(hou)級(ji)為(wei)袋除塵(chen)區，兩(liang)級(ji)之(zhi)間(jian)采用(yong)串聯結(jie)構有(you)機(ji)結(jie)合。兩(liang)級(ji)除塵(chen)方(fang)式之(zhi)間(jian)有(you)采用(yong)了特殊分流(liu)引流(liu)裝置，使(shi)兩(liang)個(ge)區域清楚分開。電(dian)除塵(chen)器(qi)設置在(zai)前(qian)，能(neng)不捕集大量粉塵(chen)，沉降高溫煙(yan)氣中未熄滅的顆粒，緩(huan)沖(chong)均勻(yun)氣流(liu)；濾筒串聯在(zai)后(hou)，收集少(shao)量的細粉塵(chen)，嚴把排放關。同(tong)時，兩(liang)除塵(chen)區域中任何(he)一方(fang)發(fa)上故障時，另一區域保持(chi)一定的除塵(chen)效果，具有(you)較強的相互彌補性。