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。
臥式靜電(dian)(dian)除塵器是以(yi)靜電(dian)(dian)凈(jing)(jing)化(hua)法來(lai)(lai)收捕廢氣(qi)(qi)(qi)中(zhong)的(de)(de)粉塵,它的(de)(de)凈(jing)(jing)化(hua)工作(zuo)(zuo)上(shang)要是依靠電(dian)(dian)暈(yun)(yun)極(ji)(ji)和沉(chen)(chen)淀兩個系統來(lai)(lai)完(wan)成的(de)(de),當含塵氣(qi)(qi)(qi)體(ti)進人(ren)氣(qi)(qi)(qi)刺叭時,含塵氣(qi)(qi)(qi)體(ti)受到氣(qi)(qi)(qi)流(liu)分布板(ban)以(yi)及折流(liu)板(ban)的(de)(de)調整后(hou),使(shi)氣(qi)(qi)(qi)流(liu)能較均(jun)勻地進人(ren)電(dian)(dian)場。在(zai)(zai)橫斷面擴大的(de)(de)作(zuo)(zuo)用(yong)(yong)下,氣(qi)(qi)(qi)流(liu)速度(du)(du)迅速降(jiang)低,其(qi)中(zhong)有些較重的(de)(de)塵粒(li)便失去速度(du)(du)而沉(chen)(chen)降(jiang)下來(lai)(lai)。進人(ren)電(dian)(dian)場的(de)(de)含塵氣(qi)(qi)(qi)體(ti)由于電(dian)(dian)暈(yun)(yun)極(ji)(ji)通(tong)人(ren)高壓直流(liu)電(dian)(dian),則在(zai)(zai)電(dian)(dian)暈(yun)(yun)極(ji)(ji)附(fu)近產生電(dian)(dian)暈(yun)(yun)現象(xiang),使(shi)氣(qi)(qi)(qi)體(ti)電(dian)(dian)離(li)(li),電(dian)(dian)離(li)(li)后(hou)的(de)(de)氣(qi)(qi)(qi)體(ti)中(zhong)存在(zai)(zai)大量的(de)(de)電(dian)(dian)子(zi)(zi)和離(li)(li)子(zi)(zi),這些電(dian)(dian)子(zi)(zi)和離(li)(li)子(zi)(zi)與進人(ren)電(dian)(dian)場的(de)(de)粉塵結合起來(lai)(lai),使(shi)塵粒(li)帶電(dian)(dian),帶電(dian)(dian)塵粒(li)在(zai)(zai)電(dian)(dian)場力的(de)(de)作(zuo)(zuo)用(yong)(yong)下趨向本設備(bei)陽極(ji)(ji)(正極(ji)(ji)、本設備(bei)采用(yong)(yong)負高壓制(zhi))和陰極(ji)(ji)(負極(ji)(ji)) , 釋(shi)放(fang)出電(dian)(dian)子(zi)(zi)分別沉(chen)(chen)積在(zai)(zai)相應的(de)(de)電(dian)(dian)極(ji)(ji)上(shang),通(tong)過設備(bei)陰陽極(ji)(ji)振(zhen)打系統的(de)(de)振(zhen)打,使(shi)沉(chen)(chen)積在(zai)(zai)陰陽電(dian)(dian)極(ji)(ji)上(shang)的(de)(de)粉塵振(zhen)落,進人(ren)集灰斗(dou) 通(tong)過排灰裝置放(fang)出,回收有物料,被)凈(jing)(jing)化(hua)的(de)(de)氣(qi)(qi)(qi)體(ti)排入大氣(qi)(qi)(qi)。
工作(zuo)原理
靜電(dian)(dian)除(chu)塵(chen)(chen)器的(de)工作(zuo)原理是利(li)用高(gao)(gao)壓電(dian)(dian)場使煙(yan)氣發生(sheng)電(dian)(dian)離,氣流(liu)(liu)(liu)中的(de)粉(fen)塵(chen)(chen)荷電(dian)(dian)在(zai)電(dian)(dian)場作(zuo)用下與氣流(liu)(liu)(liu)分離。負(fu)極由不(bu)同(tong)斷面形狀(zhuang)的(de)金(jin)屬導(dao)線制(zhi)成(cheng)(cheng),叫放(fang)電(dian)(dian)電(dian)(dian)極。正極由不(bu)同(tong)幾何形狀(zhuang)的(de)金(jin)屬板制(zhi)成(cheng)(cheng),叫集(ji)塵(chen)(chen)電(dian)(dian)極。靜電(dian)(dian)除(chu)塵(chen)(chen)器的(de)性(xing)能(neng)受(shou)粉(fen)塵(chen)(chen)性(xing)質、設備構造和煙(yan)氣流(liu)(liu)(liu)速等三個因素的(de)影響。粉(fen)塵(chen)(chen)的(de)比(bi)電(dian)(dian)阻(zu)是評價導(dao)電(dian)(dian)性(xing)的(de)指標,它對(dui)除(chu)塵(chen)(chen)效(xiao)率有直接的(de)影響。比(bi)電(dian)(dian)阻(zu)過低(di),塵(chen)(chen)粒(li)難以保持(chi)在(zai)集(ji)塵(chen)(chen)電(dian)(dian)極上,致使其重返(fan)氣流(liu)(liu)(liu)。比(bi)電(dian)(dian)阻(zu)過高(gao)(gao),到達集(ji)塵(chen)(chen)電(dian)(dian)極的(de)塵(chen)(chen)粒(li)電(dian)(dian)荷不(bu)易放(fang)出(chu),在(zai)塵(chen)(chen)層之間形成(cheng)(cheng)電(dian)(dian)壓梯度會(hui)產(chan)生(sheng)局部擊(ji)穿和放(fang)電(dian)(dian)現象。這些情況都(dou)會(hui)造成(cheng)(cheng)除(chu)塵(chen)(chen)效(xiao)率下降。
電(dian)(dian)除(chu)塵(chen)器的(de)(de)基本原理是利用電(dian)(dian)力捕集(ji)(ji)煙氣中的(de)(de)粉(fen)(fen)塵(chen),主(zhu)要包括以下四個相(xiang)互有關的(de)(de)物理過(guo)程: (1) 氣體的(de)(de)電(dian)(dian)離。(2) 粉(fen)(fen)塵(chen)的(de)(de)荷(he)電(dian)(dian)。(3) 荷(he)電(dian)(dian)粉(fen)(fen)塵(chen)向電(dian)(dian)極移動。(4) 荷(he)電(dian)(dian)粉(fen)(fen)塵(chen)的(de)(de)捕集(ji)(ji)。