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。
臥式靜電(dian)(dian)(dian)除(chu)塵器是以靜電(dian)(dian)(dian)凈(jing)化法來收捕廢氣(qi)(qi)(qi)中的(de)粉塵,它(ta)的(de)凈(jing)化工作(zuo)上要是依(yi)靠電(dian)(dian)(dian)暈極(ji)(ji)(ji)(ji)和(he)(he)沉(chen)(chen)淀兩個系(xi)統(tong)來完成的(de),當含塵氣(qi)(qi)(qi)體(ti)進(jin)人氣(qi)(qi)(qi)刺叭(ba)時,含塵氣(qi)(qi)(qi)體(ti)受(shou)到氣(qi)(qi)(qi)流(liu)(liu)分布板(ban)以及折流(liu)(liu)板(ban)的(de)調(diao)整后,使(shi)氣(qi)(qi)(qi)流(liu)(liu)能(neng)較(jiao)均(jun)勻地進(jin)人電(dian)(dian)(dian)場。在(zai)橫斷面擴(kuo)大的(de)作(zuo)用(yong)下,氣(qi)(qi)(qi)流(liu)(liu)速度迅速降低,其中有些(xie)較(jiao)重的(de)塵粒便失去速度而(er)沉(chen)(chen)降下來。進(jin)人電(dian)(dian)(dian)場的(de)含塵氣(qi)(qi)(qi)體(ti)由于(yu)電(dian)(dian)(dian)暈極(ji)(ji)(ji)(ji)通人高壓直流(liu)(liu)電(dian)(dian)(dian),則在(zai)電(dian)(dian)(dian)暈極(ji)(ji)(ji)(ji)附近(jin)產生電(dian)(dian)(dian)暈現象,使(shi)氣(qi)(qi)(qi)體(ti)電(dian)(dian)(dian)離(li),電(dian)(dian)(dian)離(li)后的(de)氣(qi)(qi)(qi)體(ti)中存在(zai)大量的(de)電(dian)(dian)(dian)子(zi)(zi)和(he)(he)離(li)子(zi)(zi),這些(xie)電(dian)(dian)(dian)子(zi)(zi)和(he)(he)離(li)子(zi)(zi)與進(jin)人電(dian)(dian)(dian)場的(de)粉塵結合起(qi)來,使(shi)塵粒帶電(dian)(dian)(dian),帶電(dian)(dian)(dian)塵粒在(zai)電(dian)(dian)(dian)場力的(de)作(zuo)用(yong)下趨向(xiang)本設備(bei)陽極(ji)(ji)(ji)(ji)(正(zheng)極(ji)(ji)(ji)(ji)、本設備(bei)采(cai)用(yong)負高壓制)和(he)(he)陰(yin)極(ji)(ji)(ji)(ji)(負極(ji)(ji)(ji)(ji)) , 釋放出電(dian)(dian)(dian)子(zi)(zi)分別沉(chen)(chen)積(ji)在(zai)相應的(de)電(dian)(dian)(dian)極(ji)(ji)(ji)(ji)上,通過設備(bei)陰(yin)陽極(ji)(ji)(ji)(ji)振打(da)系(xi)統(tong)的(de)振打(da),使(shi)沉(chen)(chen)積(ji)在(zai)陰(yin)陽電(dian)(dian)(dian)極(ji)(ji)(ji)(ji)上的(de)粉塵振落,進(jin)人集灰斗 通過排灰裝置放出,回收有物料,被)凈(jing)化的(de)氣(qi)(qi)(qi)體(ti)排入大氣(qi)(qi)(qi)。
工(gong)作原理
靜電(dian)(dian)(dian)(dian)(dian)(dian)除(chu)(chu)(chu)塵(chen)(chen)(chen)器的(de)工(gong)作原理是(shi)利用高壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)場(chang)使煙(yan)氣(qi)(qi)發(fa)生(sheng)電(dian)(dian)(dian)(dian)(dian)(dian)離(li),氣(qi)(qi)流(liu)(liu)中的(de)粉(fen)塵(chen)(chen)(chen)荷電(dian)(dian)(dian)(dian)(dian)(dian)在(zai)(zai)電(dian)(dian)(dian)(dian)(dian)(dian)場(chang)作用下(xia)與氣(qi)(qi)流(liu)(liu)分離(li)。負(fu)極(ji)由不(bu)同斷面(mian)形狀(zhuang)的(de)金(jin)屬導線制成,叫放電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)。正極(ji)由不(bu)同幾何形狀(zhuang)的(de)金(jin)屬板制成,叫集塵(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)。靜電(dian)(dian)(dian)(dian)(dian)(dian)除(chu)(chu)(chu)塵(chen)(chen)(chen)器的(de)性能受粉(fen)塵(chen)(chen)(chen)性質、設(she)備(bei)構造和(he)煙(yan)氣(qi)(qi)流(liu)(liu)速等三(san)個因(yin)素的(de)影響。粉(fen)塵(chen)(chen)(chen)的(de)比電(dian)(dian)(dian)(dian)(dian)(dian)阻是(shi)評(ping)價(jia)導電(dian)(dian)(dian)(dian)(dian)(dian)性的(de)指標,它(ta)對(dui)除(chu)(chu)(chu)塵(chen)(chen)(chen)效(xiao)率有(you)直(zhi)接的(de)影響。比電(dian)(dian)(dian)(dian)(dian)(dian)阻過低,塵(chen)(chen)(chen)粒難以(yi)保持在(zai)(zai)集塵(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)上,致使其重返氣(qi)(qi)流(liu)(liu)。比電(dian)(dian)(dian)(dian)(dian)(dian)阻過高,到達集塵(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)的(de)塵(chen)(chen)(chen)粒電(dian)(dian)(dian)(dian)(dian)(dian)荷不(bu)易放出(chu),在(zai)(zai)塵(chen)(chen)(chen)層(ceng)之間形成電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)梯度會(hui)(hui)產(chan)生(sheng)局部擊(ji)穿和(he)放電(dian)(dian)(dian)(dian)(dian)(dian)現象(xiang)。這些(xie)情況(kuang)都會(hui)(hui)造成除(chu)(chu)(chu)塵(chen)(chen)(chen)效(xiao)率下(xia)降。
電除(chu)塵(chen)器(qi)的(de)基(ji)本(ben)原理是利用電力捕集煙(yan)氣中的(de)粉(fen)塵(chen),主(zhu)要包括以下四個相互(hu)有關(guan)的(de)物(wu)理過程: (1) 氣體的(de)電離(li)。(2) 粉(fen)塵(chen)的(de)荷電。(3) 荷電粉(fen)塵(chen)向電極(ji)移動(dong)。(4) 荷電粉(fen)塵(chen)的(de)捕集。