臥式靜電除塵器是眾多除塵器當中的一種,臥式靜電除塵器是以靜電凈化法來收捕廢氣中的粉塵的設備,其主要是讓含塵氣體進人氣刺叭時,含塵氣體受到氣流分布板以及折流板的調整后,使氣流能較均勻地進人電場。
臥式(shi)靜電(dian)(dian)除塵(chen)(chen)器(qi)是以靜電(dian)(dian)凈(jing)化法來(lai)收捕廢氣(qi)(qi)中的(de)(de)(de)(de)粉塵(chen)(chen),它的(de)(de)(de)(de)凈(jing)化工作上要是依靠電(dian)(dian)暈(yun)(yun)極(ji)(ji)(ji)和(he)沉淀(dian)兩(liang)個系統來(lai)完成(cheng)的(de)(de)(de)(de),當含(han)塵(chen)(chen)氣(qi)(qi)體(ti)(ti)進(jin)(jin)人氣(qi)(qi)刺(ci)叭時,含(han)塵(chen)(chen)氣(qi)(qi)體(ti)(ti)受到氣(qi)(qi)流(liu)分布板以及折(zhe)流(liu)板的(de)(de)(de)(de)調整后,使氣(qi)(qi)流(liu)能(neng)較均勻地(di)進(jin)(jin)人電(dian)(dian)場。在(zai)橫斷面擴大(da)的(de)(de)(de)(de)作用(yong)下,氣(qi)(qi)流(liu)速度迅速降低,其中有些(xie)較重(zhong)的(de)(de)(de)(de)塵(chen)(chen)粒(li)(li)便(bian)失去速度而沉降下來(lai)。進(jin)(jin)人電(dian)(dian)場的(de)(de)(de)(de)含(han)塵(chen)(chen)氣(qi)(qi)體(ti)(ti)由于(yu)電(dian)(dian)暈(yun)(yun)極(ji)(ji)(ji)通(tong)人高(gao)壓(ya)直(zhi)流(liu)電(dian)(dian),則在(zai)電(dian)(dian)暈(yun)(yun)極(ji)(ji)(ji)附近產生電(dian)(dian)暈(yun)(yun)現象,使氣(qi)(qi)體(ti)(ti)電(dian)(dian)離,電(dian)(dian)離后的(de)(de)(de)(de)氣(qi)(qi)體(ti)(ti)中存(cun)在(zai)大(da)量(liang)的(de)(de)(de)(de)電(dian)(dian)子(zi)和(he)離子(zi),這些(xie)電(dian)(dian)子(zi)和(he)離子(zi)與進(jin)(jin)人電(dian)(dian)場的(de)(de)(de)(de)粉塵(chen)(chen)結合起來(lai),使塵(chen)(chen)粒(li)(li)帶(dai)電(dian)(dian),帶(dai)電(dian)(dian)塵(chen)(chen)粒(li)(li)在(zai)電(dian)(dian)場力的(de)(de)(de)(de)作用(yong)下趨向本設備陽極(ji)(ji)(ji)(正極(ji)(ji)(ji)、本設備采用(yong)負高(gao)壓(ya)制)和(he)陰(yin)(yin)極(ji)(ji)(ji)(負極(ji)(ji)(ji)) , 釋放出電(dian)(dian)子(zi)分別沉積在(zai)相應的(de)(de)(de)(de)電(dian)(dian)極(ji)(ji)(ji)上,通(tong)過(guo)設備陰(yin)(yin)陽極(ji)(ji)(ji)振(zhen)打系統的(de)(de)(de)(de)振(zhen)打,使沉積在(zai)陰(yin)(yin)陽電(dian)(dian)極(ji)(ji)(ji)上的(de)(de)(de)(de)粉塵(chen)(chen)振(zhen)落,進(jin)(jin)人集灰(hui)斗 通(tong)過(guo)排灰(hui)裝置放出,回收有物料,被)凈(jing)化的(de)(de)(de)(de)氣(qi)(qi)體(ti)(ti)排入大(da)氣(qi)(qi)。
工(gong)作原理(li)
靜電(dian)(dian)(dian)除塵(chen)器(qi)的(de)工作(zuo)原理是利用高(gao)(gao)壓電(dian)(dian)(dian)場(chang)使煙氣(qi)發生電(dian)(dian)(dian)離(li),氣(qi)流中的(de)粉(fen)塵(chen)荷電(dian)(dian)(dian)在(zai)電(dian)(dian)(dian)場(chang)作(zuo)用下(xia)與氣(qi)流分離(li)。負極(ji)由(you)不(bu)同(tong)斷面形(xing)狀(zhuang)的(de)金(jin)屬(shu)導線制(zhi)成,叫(jiao)放電(dian)(dian)(dian)電(dian)(dian)(dian)極(ji)。正極(ji)由(you)不(bu)同(tong)幾何形(xing)狀(zhuang)的(de)金(jin)屬(shu)板(ban)制(zhi)成,叫(jiao)集(ji)塵(chen)電(dian)(dian)(dian)極(ji)。靜電(dian)(dian)(dian)除塵(chen)器(qi)的(de)性(xing)能(neng)受粉(fen)塵(chen)性(xing)質、設備(bei)構造和煙氣(qi)流速(su)等三個因(yin)素的(de)影響。粉(fen)塵(chen)的(de)比(bi)電(dian)(dian)(dian)阻(zu)(zu)是評價(jia)導電(dian)(dian)(dian)性(xing)的(de)指(zhi)標,它對除塵(chen)效率有直接的(de)影響。比(bi)電(dian)(dian)(dian)阻(zu)(zu)過(guo)低,塵(chen)粒難以保持在(zai)集(ji)塵(chen)電(dian)(dian)(dian)極(ji)上,致使其重(zhong)返氣(qi)流。比(bi)電(dian)(dian)(dian)阻(zu)(zu)過(guo)高(gao)(gao),到(dao)達集(ji)塵(chen)電(dian)(dian)(dian)極(ji)的(de)塵(chen)粒電(dian)(dian)(dian)荷不(bu)易放出,在(zai)塵(chen)層之間形(xing)成電(dian)(dian)(dian)壓梯度(du)會產生局部擊穿(chuan)和放電(dian)(dian)(dian)現象。這些情況(kuang)都會造成除塵(chen)效率下(xia)降。
電除塵(chen)(chen)器的(de)(de)基本原理是利用(yong)電力(li)捕集煙(yan)氣中的(de)(de)粉(fen)塵(chen)(chen),主(zhu)要包(bao)括(kuo)以下四個相互有關的(de)(de)物(wu)理過程: (1) 氣體(ti)的(de)(de)電離(li)。(2) 粉(fen)塵(chen)(chen)的(de)(de)荷(he)電。(3) 荷(he)電粉(fen)塵(chen)(chen)向電極移動。(4) 荷(he)電粉(fen)塵(chen)(chen)的(de)(de)捕集。