XWD型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(wo)式靜電(dian)(dian)(dian)除塵器是以靜電(dian)(dian)(dian)凈化法來(lai)收捕(bu)廢氣(qi)(qi)中的(de)粉(fen)塵,它的(de)凈化工作(zuo)上(shang)要(yao)是依靠電(dian)(dian)(dian)暈(yun)極(ji)和(he)沉淀兩個系統來(lai)完成的(de),當含塵氣(qi)(qi)體(ti)(ti)進(jin)人氣(qi)(qi)刺叭(ba)時(shi),含塵氣(qi)(qi)體(ti)(ti)受到氣(qi)(qi)流分布板以及折流板的(de)調整后(hou),使氣(qi)(qi)流能較均(jun)勻地進(jin)人電(dian)(dian)(dian)場。在(zai)(zai)橫斷面擴大(da)的(de)作(zuo)用下,氣(qi)(qi)流速度(du)迅(xun)速降(jiang)低,其中有些(xie)較重的(de)塵粒(li)(li)便失去速度(du)而沉降(jiang)下來(lai)。進(jin)人電(dian)(dian)(dian)場的(de)含塵氣(qi)(qi)體(ti)(ti)由于(yu)電(dian)(dian)(dian)暈(yun)極(ji)通(tong)(tong)(tong)人高壓直(zhi)流電(dian)(dian)(dian),則在(zai)(zai)電(dian)(dian)(dian)暈(yun)極(ji)附近(jin)產生電(dian)(dian)(dian)暈(yun)現象,使氣(qi)(qi)體(ti)(ti)電(dian)(dian)(dian)離(li),電(dian)(dian)(dian)離(li)后(hou)的(de)氣(qi)(qi)體(ti)(ti)中存(cun)在(zai)(zai)大(da)量的(de)電(dian)(dian)(dian)子(zi)和(he)離(li)子(zi),這些(xie)電(dian)(dian)(dian)子(zi)和(he)離(li)子(zi)與(yu)進(jin)人電(dian)(dian)(dian)場的(de)粉(fen)塵結合起來(lai),使塵粒(li)(li)帶電(dian)(dian)(dian),帶電(dian)(dian)(dian)塵粒(li)(li)在(zai)(zai)電(dian)(dian)(dian)場力的(de)作(zuo)用下趨向(xiang)本設備陽極(ji)(正極(ji)、本設備采用負(fu)高壓制)和(he)陰極(ji)(負(fu)極(ji)) , 釋放(fang)出(chu)電(dian)(dian)(dian)子(zi)分別沉積(ji)在(zai)(zai)相應的(de)電(dian)(dian)(dian)極(ji)上(shang),通(tong)(tong)(tong)過設備陰陽極(ji)振(zhen)(zhen)打(da)(da)系統的(de)振(zhen)(zhen)打(da)(da),使沉積(ji)在(zai)(zai)陰陽電(dian)(dian)(dian)極(ji)上(shang)的(de)粉(fen)塵振(zhen)(zhen)落(luo),進(jin)人集灰斗 通(tong)(tong)(tong)過排(pai)灰裝置放(fang)出(chu),回收有物料,被)凈化的(de)氣(qi)(qi)體(ti)(ti)排(pai)入(ru)大(da)氣(qi)(qi)。
工作原理
靜電(dian)(dian)除塵(chen)器的(de)(de)工作(zuo)原理是利用(yong)高壓(ya)電(dian)(dian)場(chang)使(shi)煙(yan)氣發生(sheng)電(dian)(dian)離(li),氣流(liu)中的(de)(de)粉塵(chen)荷(he)電(dian)(dian)在電(dian)(dian)場(chang)作(zuo)用(yong)下(xia)與氣流(liu)分(fen)離(li)。負極(ji)(ji)由不同斷(duan)面形狀(zhuang)的(de)(de)金(jin)屬導線制(zhi)(zhi)成,叫放(fang)電(dian)(dian)電(dian)(dian)極(ji)(ji)。正極(ji)(ji)由不同幾何(he)形狀(zhuang)的(de)(de)金(jin)屬板制(zhi)(zhi)成,叫集(ji)(ji)塵(chen)電(dian)(dian)極(ji)(ji)。靜電(dian)(dian)除塵(chen)器的(de)(de)性能受粉塵(chen)性質、設備構造和煙(yan)氣流(liu)速(su)等三個因素的(de)(de)影響。粉塵(chen)的(de)(de)比電(dian)(dian)阻是評價導電(dian)(dian)性的(de)(de)指標,它對除塵(chen)效(xiao)率(lv)有直(zhi)接的(de)(de)影響。比電(dian)(dian)阻過低,塵(chen)粒(li)難以保持在集(ji)(ji)塵(chen)電(dian)(dian)極(ji)(ji)上,致使(shi)其重返氣流(liu)。比電(dian)(dian)阻過高,到達(da)集(ji)(ji)塵(chen)電(dian)(dian)極(ji)(ji)的(de)(de)塵(chen)粒(li)電(dian)(dian)荷(he)不易(yi)放(fang)出,在塵(chen)層(ceng)之間(jian)形成電(dian)(dian)壓(ya)梯度(du)會產(chan)生(sheng)局部擊(ji)穿和放(fang)電(dian)(dian)現象。這些情況都會造成除塵(chen)效(xiao)率(lv)下(xia)降。
電(dian)除塵(chen)(chen)器的(de)(de)(de)基本原理是利用電(dian)力捕集(ji)煙氣(qi)中的(de)(de)(de)粉(fen)(fen)塵(chen)(chen),主(zhu)要包(bao)括以(yi)下(xia)四個(ge)相互有關的(de)(de)(de)物理過程: (1) 氣(qi)體(ti)的(de)(de)(de)電(dian)離。(2) 粉(fen)(fen)塵(chen)(chen)的(de)(de)(de)荷(he)(he)電(dian)。(3) 荷(he)(he)電(dian)粉(fen)(fen)塵(chen)(chen)向電(dian)極(ji)移動(dong)。(4) 荷(he)(he)電(dian)粉(fen)(fen)塵(chen)(chen)的(de)(de)(de)捕集(ji)。