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)(dian)(dian)(dian)除塵(chen)(chen)(chen)器是以靜電(dian)(dian)(dian)(dian)(dian)凈(jing)化法來(lai)(lai)收捕廢氣(qi)(qi)(qi)中的(de)(de)粉塵(chen)(chen)(chen),它的(de)(de)凈(jing)化工作上要(yao)是依靠電(dian)(dian)(dian)(dian)(dian)暈(yun)極(ji)和(he)(he)沉淀(dian)兩個系統來(lai)(lai)完(wan)成的(de)(de),當含塵(chen)(chen)(chen)氣(qi)(qi)(qi)體(ti)(ti)進(jin)(jin)人氣(qi)(qi)(qi)刺叭時,含塵(chen)(chen)(chen)氣(qi)(qi)(qi)體(ti)(ti)受到氣(qi)(qi)(qi)流(liu)分布板以及折流(liu)板的(de)(de)調整后,使(shi)氣(qi)(qi)(qi)流(liu)能較(jiao)均勻地(di)進(jin)(jin)人電(dian)(dian)(dian)(dian)(dian)場(chang)。在(zai)橫斷面擴大的(de)(de)作用下,氣(qi)(qi)(qi)流(liu)速度(du)迅速降低,其中有些較(jiao)重的(de)(de)塵(chen)(chen)(chen)粒(li)便(bian)失去速度(du)而沉降下來(lai)(lai)。進(jin)(jin)人電(dian)(dian)(dian)(dian)(dian)場(chang)的(de)(de)含塵(chen)(chen)(chen)氣(qi)(qi)(qi)體(ti)(ti)由于電(dian)(dian)(dian)(dian)(dian)暈(yun)極(ji)通(tong)(tong)人高壓(ya)直流(liu)電(dian)(dian)(dian)(dian)(dian),則在(zai)電(dian)(dian)(dian)(dian)(dian)暈(yun)極(ji)附近產生電(dian)(dian)(dian)(dian)(dian)暈(yun)現(xian)象,使(shi)氣(qi)(qi)(qi)體(ti)(ti)電(dian)(dian)(dian)(dian)(dian)離,電(dian)(dian)(dian)(dian)(dian)離后的(de)(de)氣(qi)(qi)(qi)體(ti)(ti)中存在(zai)大量的(de)(de)電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)和(he)(he)離子(zi)(zi),這些電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)和(he)(he)離子(zi)(zi)與(yu)進(jin)(jin)人電(dian)(dian)(dian)(dian)(dian)場(chang)的(de)(de)粉塵(chen)(chen)(chen)結合(he)起來(lai)(lai),使(shi)塵(chen)(chen)(chen)粒(li)帶電(dian)(dian)(dian)(dian)(dian),帶電(dian)(dian)(dian)(dian)(dian)塵(chen)(chen)(chen)粒(li)在(zai)電(dian)(dian)(dian)(dian)(dian)場(chang)力的(de)(de)作用下趨(qu)向本設備陽極(ji)(正極(ji)、本設備采用負高壓(ya)制(zhi))和(he)(he)陰極(ji)(負極(ji)) , 釋放(fang)出(chu)電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)分別沉積在(zai)相應(ying)的(de)(de)電(dian)(dian)(dian)(dian)(dian)極(ji)上,通(tong)(tong)過設備陰陽極(ji)振(zhen)打系統的(de)(de)振(zhen)打,使(shi)沉積在(zai)陰陽電(dian)(dian)(dian)(dian)(dian)極(ji)上的(de)(de)粉塵(chen)(chen)(chen)振(zhen)落,進(jin)(jin)人集灰斗 通(tong)(tong)過排灰裝置(zhi)放(fang)出(chu),回收有物料,被)凈(jing)化的(de)(de)氣(qi)(qi)(qi)體(ti)(ti)排入大氣(qi)(qi)(qi)。
工作(zuo)原理
靜(jing)(jing)電(dian)(dian)(dian)除(chu)塵(chen)(chen)器的(de)(de)工(gong)作原理是(shi)利用(yong)高壓電(dian)(dian)(dian)場(chang)使煙氣(qi)發(fa)生(sheng)電(dian)(dian)(dian)離(li),氣(qi)流(liu)中的(de)(de)粉塵(chen)(chen)荷電(dian)(dian)(dian)在(zai)電(dian)(dian)(dian)場(chang)作用(yong)下(xia)與氣(qi)流(liu)分離(li)。負極(ji)由(you)(you)不同斷面(mian)形狀的(de)(de)金屬導線制成(cheng)(cheng),叫放電(dian)(dian)(dian)電(dian)(dian)(dian)極(ji)。正極(ji)由(you)(you)不同幾何形狀的(de)(de)金屬板(ban)制成(cheng)(cheng),叫集(ji)塵(chen)(chen)電(dian)(dian)(dian)極(ji)。靜(jing)(jing)電(dian)(dian)(dian)除(chu)塵(chen)(chen)器的(de)(de)性(xing)能受粉塵(chen)(chen)性(xing)質、設備構造和(he)(he)煙氣(qi)流(liu)速等三個因素(su)的(de)(de)影響。粉塵(chen)(chen)的(de)(de)比電(dian)(dian)(dian)阻是(shi)評價(jia)導電(dian)(dian)(dian)性(xing)的(de)(de)指標,它對(dui)除(chu)塵(chen)(chen)效率(lv)有直接的(de)(de)影響。比電(dian)(dian)(dian)阻過低,塵(chen)(chen)粒難(nan)以保持在(zai)集(ji)塵(chen)(chen)電(dian)(dian)(dian)極(ji)上,致使其(qi)重返(fan)氣(qi)流(liu)。比電(dian)(dian)(dian)阻過高,到達集(ji)塵(chen)(chen)電(dian)(dian)(dian)極(ji)的(de)(de)塵(chen)(chen)粒電(dian)(dian)(dian)荷不易(yi)放出(chu),在(zai)塵(chen)(chen)層之間形成(cheng)(cheng)電(dian)(dian)(dian)壓梯度(du)會產生(sheng)局部(bu)擊(ji)穿和(he)(he)放電(dian)(dian)(dian)現象。這些情況都(dou)會造成(cheng)(cheng)除(chu)塵(chen)(chen)效率(lv)下(xia)降。
電(dian)除塵(chen)器的(de)(de)基(ji)本原理(li)是利用(yong)電(dian)力捕集(ji)煙氣(qi)中的(de)(de)粉(fen)(fen)塵(chen),主要(yao)包括以下四個相互有關的(de)(de)物理(li)過(guo)程: (1) 氣(qi)體(ti)的(de)(de)電(dian)離。(2) 粉(fen)(fen)塵(chen)的(de)(de)荷(he)電(dian)。(3) 荷(he)電(dian)粉(fen)(fen)塵(chen)向電(dian)極移動。(4) 荷(he)電(dian)粉(fen)(fen)塵(chen)的(de)(de)捕集(ji)。