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)(dian)除塵器是(shi)以(yi)靜電(dian)(dian)(dian)凈(jing)化(hua)法來(lai)收捕廢氣(qi)中(zhong)的(de)(de)(de)(de)粉塵,它的(de)(de)(de)(de)凈(jing)化(hua)工作上(shang)要是(shi)依靠電(dian)(dian)(dian)暈極(ji)和沉(chen)淀兩個(ge)系(xi)統來(lai)完成的(de)(de)(de)(de),當含(han)(han)塵氣(qi)體(ti)進人(ren)(ren)氣(qi)刺叭時,含(han)(han)塵氣(qi)體(ti)受到氣(qi)流(liu)(liu)分(fen)布板(ban)以(yi)及折流(liu)(liu)板(ban)的(de)(de)(de)(de)調整后,使氣(qi)流(liu)(liu)能較均勻地進人(ren)(ren)電(dian)(dian)(dian)場。在(zai)橫(heng)斷面(mian)擴大的(de)(de)(de)(de)作用下(xia),氣(qi)流(liu)(liu)速度迅速降(jiang)(jiang)低,其中(zhong)有些(xie)(xie)較重(zhong)的(de)(de)(de)(de)塵粒便(bian)失去(qu)速度而沉(chen)降(jiang)(jiang)下(xia)來(lai)。進人(ren)(ren)電(dian)(dian)(dian)場的(de)(de)(de)(de)含(han)(han)塵氣(qi)體(ti)由于電(dian)(dian)(dian)暈極(ji)通人(ren)(ren)高(gao)壓(ya)直流(liu)(liu)電(dian)(dian)(dian),則(ze)在(zai)電(dian)(dian)(dian)暈極(ji)附近產(chan)生電(dian)(dian)(dian)暈現象,使氣(qi)體(ti)電(dian)(dian)(dian)離(li),電(dian)(dian)(dian)離(li)后的(de)(de)(de)(de)氣(qi)體(ti)中(zhong)存在(zai)大量的(de)(de)(de)(de)電(dian)(dian)(dian)子(zi)和離(li)子(zi),這些(xie)(xie)電(dian)(dian)(dian)子(zi)和離(li)子(zi)與進人(ren)(ren)電(dian)(dian)(dian)場的(de)(de)(de)(de)粉塵結合(he)起(qi)來(lai),使塵粒帶(dai)電(dian)(dian)(dian),帶(dai)電(dian)(dian)(dian)塵粒在(zai)電(dian)(dian)(dian)場力(li)的(de)(de)(de)(de)作用下(xia)趨向(xiang)本設(she)(she)備陽極(ji)(正極(ji)、本設(she)(she)備采用負高(gao)壓(ya)制)和陰(yin)極(ji)(負極(ji)) , 釋(shi)放出電(dian)(dian)(dian)子(zi)分(fen)別沉(chen)積在(zai)相(xiang)應的(de)(de)(de)(de)電(dian)(dian)(dian)極(ji)上(shang),通過設(she)(she)備陰(yin)陽極(ji)振(zhen)打系(xi)統的(de)(de)(de)(de)振(zhen)打,使沉(chen)積在(zai)陰(yin)陽電(dian)(dian)(dian)極(ji)上(shang)的(de)(de)(de)(de)粉塵振(zhen)落,進人(ren)(ren)集灰斗 通過排(pai)灰裝置放出,回收有物料,被)凈(jing)化(hua)的(de)(de)(de)(de)氣(qi)體(ti)排(pai)入大氣(qi)。
工(gong)作原理
靜(jing)電(dian)除塵(chen)器的(de)(de)(de)工作原理是(shi)利(li)用(yong)高壓電(dian)場(chang)(chang)使煙氣發生電(dian)離,氣流中的(de)(de)(de)粉塵(chen)荷電(dian)在電(dian)場(chang)(chang)作用(yong)下(xia)與氣流分(fen)離。負極(ji)(ji)(ji)由不(bu)同斷面形狀的(de)(de)(de)金屬導(dao)(dao)線制成(cheng)(cheng),叫(jiao)(jiao)放電(dian)電(dian)極(ji)(ji)(ji)。正極(ji)(ji)(ji)由不(bu)同幾(ji)何形狀的(de)(de)(de)金屬板制成(cheng)(cheng),叫(jiao)(jiao)集塵(chen)電(dian)極(ji)(ji)(ji)。靜(jing)電(dian)除塵(chen)器的(de)(de)(de)性能受粉塵(chen)性質(zhi)、設備(bei)構造(zao)和(he)煙氣流速等三個因(yin)素(su)的(de)(de)(de)影響。粉塵(chen)的(de)(de)(de)比電(dian)阻是(shi)評價導(dao)(dao)電(dian)性的(de)(de)(de)指標,它對除塵(chen)效率有(you)直(zhi)接(jie)的(de)(de)(de)影響。比電(dian)阻過(guo)低,塵(chen)粒(li)難(nan)以保持(chi)在集塵(chen)電(dian)極(ji)(ji)(ji)上,致使其(qi)重(zhong)返氣流。比電(dian)阻過(guo)高,到達集塵(chen)電(dian)極(ji)(ji)(ji)的(de)(de)(de)塵(chen)粒(li)電(dian)荷不(bu)易(yi)放出,在塵(chen)層之間形成(cheng)(cheng)電(dian)壓梯度會產生局部擊(ji)穿和(he)放電(dian)現(xian)象。這些(xie)情況(kuang)都會造(zao)成(cheng)(cheng)除塵(chen)效率下(xia)降(jiang)。
電(dian)(dian)(dian)除塵器的(de)基本原理是利用(yong)電(dian)(dian)(dian)力捕(bu)集煙氣(qi)(qi)中的(de)粉塵,主要(yao)包括(kuo)以下四個(ge)相互有關的(de)物理過程(cheng): (1) 氣(qi)(qi)體(ti)的(de)電(dian)(dian)(dian)離。(2) 粉塵的(de)荷電(dian)(dian)(dian)。(3) 荷電(dian)(dian)(dian)粉塵向電(dian)(dian)(dian)極移(yi)動。(4) 荷電(dian)(dian)(dian)粉塵的(de)捕(bu)集。