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(jing)電(dian)除塵(chen)器是(shi)以(yi)靜(jing)電(dian)凈化(hua)(hua)法來(lai)收捕廢氣(qi)(qi)(qi)(qi)中的(de)粉(fen)(fen)塵(chen),它的(de)凈化(hua)(hua)工作上要是(shi)依靠電(dian)暈極(ji)(ji)(ji)(ji)和沉(chen)(chen)淀兩個(ge)系統來(lai)完成的(de),當含塵(chen)氣(qi)(qi)(qi)(qi)體進(jin)(jin)(jin)人(ren)(ren)氣(qi)(qi)(qi)(qi)刺叭時,含塵(chen)氣(qi)(qi)(qi)(qi)體受到氣(qi)(qi)(qi)(qi)流(liu)分(fen)(fen)布板以(yi)及折流(liu)板的(de)調整后,使氣(qi)(qi)(qi)(qi)流(liu)能較(jiao)均勻地進(jin)(jin)(jin)人(ren)(ren)電(dian)場(chang)。在(zai)(zai)橫斷面(mian)擴(kuo)大(da)的(de)作用下(xia),氣(qi)(qi)(qi)(qi)流(liu)速度(du)迅(xun)速降(jiang)低,其中有(you)些較(jiao)重的(de)塵(chen)粒便(bian)失(shi)去速度(du)而(er)沉(chen)(chen)降(jiang)下(xia)來(lai)。進(jin)(jin)(jin)人(ren)(ren)電(dian)場(chang)的(de)含塵(chen)氣(qi)(qi)(qi)(qi)體由于電(dian)暈極(ji)(ji)(ji)(ji)通人(ren)(ren)高壓直流(liu)電(dian),則(ze)在(zai)(zai)電(dian)暈極(ji)(ji)(ji)(ji)附近(jin)產生(sheng)電(dian)暈現(xian)象(xiang),使氣(qi)(qi)(qi)(qi)體電(dian)離(li)(li),電(dian)離(li)(li)后的(de)氣(qi)(qi)(qi)(qi)體中存在(zai)(zai)大(da)量的(de)電(dian)子(zi)和離(li)(li)子(zi),這(zhe)些電(dian)子(zi)和離(li)(li)子(zi)與進(jin)(jin)(jin)人(ren)(ren)電(dian)場(chang)的(de)粉(fen)(fen)塵(chen)結合起來(lai),使塵(chen)粒帶電(dian),帶電(dian)塵(chen)粒在(zai)(zai)電(dian)場(chang)力(li)的(de)作用下(xia)趨(qu)向本設(she)備陽(yang)極(ji)(ji)(ji)(ji)(正極(ji)(ji)(ji)(ji)、本設(she)備采用負高壓制(zhi))和陰極(ji)(ji)(ji)(ji)(負極(ji)(ji)(ji)(ji)) , 釋(shi)放(fang)出電(dian)子(zi)分(fen)(fen)別(bie)沉(chen)(chen)積在(zai)(zai)相應的(de)電(dian)極(ji)(ji)(ji)(ji)上,通過設(she)備陰陽(yang)極(ji)(ji)(ji)(ji)振打系統的(de)振打,使沉(chen)(chen)積在(zai)(zai)陰陽(yang)電(dian)極(ji)(ji)(ji)(ji)上的(de)粉(fen)(fen)塵(chen)振落,進(jin)(jin)(jin)人(ren)(ren)集灰斗(dou) 通過排灰裝置放(fang)出,回收有(you)物料,被)凈化(hua)(hua)的(de)氣(qi)(qi)(qi)(qi)體排入(ru)大(da)氣(qi)(qi)(qi)(qi)。
工(gong)作原理
靜(jing)電(dian)(dian)(dian)除塵(chen)器的(de)(de)(de)工作原理是利用高壓(ya)電(dian)(dian)(dian)場(chang)使煙氣發(fa)生電(dian)(dian)(dian)離,氣流(liu)中的(de)(de)(de)粉塵(chen)荷電(dian)(dian)(dian)在電(dian)(dian)(dian)場(chang)作用下(xia)(xia)與氣流(liu)分離。負極由不同(tong)斷面形狀的(de)(de)(de)金屬導線制(zhi)成(cheng)(cheng),叫放電(dian)(dian)(dian)電(dian)(dian)(dian)極。正極由不同(tong)幾何形狀的(de)(de)(de)金屬板制(zhi)成(cheng)(cheng),叫集塵(chen)電(dian)(dian)(dian)極。靜(jing)電(dian)(dian)(dian)除塵(chen)器的(de)(de)(de)性能受粉塵(chen)性質、設備構造和煙氣流(liu)速(su)等(deng)三(san)個因素的(de)(de)(de)影(ying)(ying)響(xiang)。粉塵(chen)的(de)(de)(de)比電(dian)(dian)(dian)阻是評價導電(dian)(dian)(dian)性的(de)(de)(de)指(zhi)標,它對(dui)除塵(chen)效(xiao)(xiao)率有(you)直接的(de)(de)(de)影(ying)(ying)響(xiang)。比電(dian)(dian)(dian)阻過(guo)(guo)低,塵(chen)粒(li)難以保持在集塵(chen)電(dian)(dian)(dian)極上,致使其重(zhong)返(fan)氣流(liu)。比電(dian)(dian)(dian)阻過(guo)(guo)高,到達(da)集塵(chen)電(dian)(dian)(dian)極的(de)(de)(de)塵(chen)粒(li)電(dian)(dian)(dian)荷不易放出,在塵(chen)層之間形成(cheng)(cheng)電(dian)(dian)(dian)壓(ya)梯度會產生局(ju)部(bu)擊(ji)穿(chuan)和放電(dian)(dian)(dian)現(xian)象(xiang)。這(zhe)些情況(kuang)都會造成(cheng)(cheng)除塵(chen)效(xiao)(xiao)率下(xia)(xia)降。
電(dian)(dian)除塵(chen)(chen)器(qi)的基本原理是利用電(dian)(dian)力捕集煙氣中的粉塵(chen)(chen),主要包括以下四個相互有(you)關的物理過程: (1) 氣體(ti)(ti)的電(dian)(dian)離。(2) 粉塵(chen)(chen)的荷電(dian)(dian)。(3) 荷電(dian)(dian)粉塵(chen)(chen)向電(dian)(dian)極移動。(4) 荷電(dian)(dian)粉塵(chen)(chen)的捕集。