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(shi)靜(jing)(jing)電(dian)(dian)(dian)除塵(chen)(chen)器是以(yi)靜(jing)(jing)電(dian)(dian)(dian)凈(jing)化(hua)法(fa)來(lai)收(shou)捕廢(fei)氣(qi)(qi)(qi)(qi)(qi)(qi)中的(de)(de)粉(fen)塵(chen)(chen),它的(de)(de)凈(jing)化(hua)工作(zuo)上(shang)要是依(yi)靠電(dian)(dian)(dian)暈(yun)極(ji)和沉(chen)(chen)(chen)淀兩個系統來(lai)完成的(de)(de),當(dang)含塵(chen)(chen)氣(qi)(qi)(qi)(qi)(qi)(qi)體進人(ren)氣(qi)(qi)(qi)(qi)(qi)(qi)刺叭時,含塵(chen)(chen)氣(qi)(qi)(qi)(qi)(qi)(qi)體受(shou)到氣(qi)(qi)(qi)(qi)(qi)(qi)流分(fen)布(bu)板(ban)以(yi)及折流板(ban)的(de)(de)調整后,使(shi)氣(qi)(qi)(qi)(qi)(qi)(qi)流能較(jiao)均(jun)勻地進人(ren)電(dian)(dian)(dian)場。在橫斷面擴大(da)的(de)(de)作(zuo)用下(xia),氣(qi)(qi)(qi)(qi)(qi)(qi)流速(su)度迅速(su)降低,其中有些較(jiao)重的(de)(de)塵(chen)(chen)粒便失(shi)去速(su)度而(er)沉(chen)(chen)(chen)降下(xia)來(lai)。進人(ren)電(dian)(dian)(dian)場的(de)(de)含塵(chen)(chen)氣(qi)(qi)(qi)(qi)(qi)(qi)體由于電(dian)(dian)(dian)暈(yun)極(ji)通(tong)人(ren)高(gao)壓(ya)直流電(dian)(dian)(dian),則在電(dian)(dian)(dian)暈(yun)極(ji)附近(jin)產生電(dian)(dian)(dian)暈(yun)現象,使(shi)氣(qi)(qi)(qi)(qi)(qi)(qi)體電(dian)(dian)(dian)離,電(dian)(dian)(dian)離后的(de)(de)氣(qi)(qi)(qi)(qi)(qi)(qi)體中存(cun)在大(da)量的(de)(de)電(dian)(dian)(dian)子(zi)(zi)和離子(zi)(zi),這些電(dian)(dian)(dian)子(zi)(zi)和離子(zi)(zi)與進人(ren)電(dian)(dian)(dian)場的(de)(de)粉(fen)塵(chen)(chen)結合起來(lai),使(shi)塵(chen)(chen)粒帶電(dian)(dian)(dian),帶電(dian)(dian)(dian)塵(chen)(chen)粒在電(dian)(dian)(dian)場力(li)的(de)(de)作(zuo)用下(xia)趨向本(ben)設備(bei)陽(yang)極(ji)(正極(ji)、本(ben)設備(bei)采用負(fu)高(gao)壓(ya)制)和陰(yin)極(ji)(負(fu)極(ji)) , 釋放出電(dian)(dian)(dian)子(zi)(zi)分(fen)別沉(chen)(chen)(chen)積(ji)在相應的(de)(de)電(dian)(dian)(dian)極(ji)上(shang),通(tong)過(guo)設備(bei)陰(yin)陽(yang)極(ji)振(zhen)打系統的(de)(de)振(zhen)打,使(shi)沉(chen)(chen)(chen)積(ji)在陰(yin)陽(yang)電(dian)(dian)(dian)極(ji)上(shang)的(de)(de)粉(fen)塵(chen)(chen)振(zhen)落(luo),進人(ren)集灰斗 通(tong)過(guo)排(pai)灰裝置放出,回(hui)收(shou)有物料(liao),被)凈(jing)化(hua)的(de)(de)氣(qi)(qi)(qi)(qi)(qi)(qi)體排(pai)入大(da)氣(qi)(qi)(qi)(qi)(qi)(qi)。
工作原理(li)
靜電(dian)(dian)(dian)除(chu)塵(chen)(chen)(chen)(chen)(chen)器的(de)(de)(de)工作原理是利用(yong)高(gao)壓(ya)電(dian)(dian)(dian)場(chang)使(shi)(shi)煙氣發生電(dian)(dian)(dian)離,氣流中(zhong)的(de)(de)(de)粉(fen)塵(chen)(chen)(chen)(chen)(chen)荷(he)(he)電(dian)(dian)(dian)在電(dian)(dian)(dian)場(chang)作用(yong)下與氣流分離。負(fu)極(ji)由不(bu)同斷面形狀的(de)(de)(de)金屬導線制(zhi)成(cheng)(cheng)(cheng),叫放(fang)(fang)電(dian)(dian)(dian)電(dian)(dian)(dian)極(ji)。正極(ji)由不(bu)同幾何形狀的(de)(de)(de)金屬板(ban)制(zhi)成(cheng)(cheng)(cheng),叫集(ji)塵(chen)(chen)(chen)(chen)(chen)電(dian)(dian)(dian)極(ji)。靜電(dian)(dian)(dian)除(chu)塵(chen)(chen)(chen)(chen)(chen)器的(de)(de)(de)性能受粉(fen)塵(chen)(chen)(chen)(chen)(chen)性質(zhi)、設備構造和煙氣流速等三個因素的(de)(de)(de)影響。粉(fen)塵(chen)(chen)(chen)(chen)(chen)的(de)(de)(de)比(bi)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(chu)塵(chen)(chen)(chen)(chen)(chen)效率有(you)直接(jie)的(de)(de)(de)影響。比(bi)電(dian)(dian)(dian)阻過低,塵(chen)(chen)(chen)(chen)(chen)粒難以保(bao)持在集(ji)塵(chen)(chen)(chen)(chen)(chen)電(dian)(dian)(dian)極(ji)上,致使(shi)(shi)其重(zhong)返氣流。比(bi)電(dian)(dian)(dian)阻過高(gao),到(dao)達集(ji)塵(chen)(chen)(chen)(chen)(chen)電(dian)(dian)(dian)極(ji)的(de)(de)(de)塵(chen)(chen)(chen)(chen)(chen)粒電(dian)(dian)(dian)荷(he)(he)不(bu)易放(fang)(fang)出,在塵(chen)(chen)(chen)(chen)(chen)層之(zhi)間形成(cheng)(cheng)(cheng)電(dian)(dian)(dian)壓(ya)梯(ti)度會產生局(ju)部擊穿和放(fang)(fang)電(dian)(dian)(dian)現象。這些(xie)情(qing)況都會造成(cheng)(cheng)(cheng)除(chu)塵(chen)(chen)(chen)(chen)(chen)效率下降(jiang)。
電(dian)(dian)除塵(chen)器的(de)基本(ben)原理(li)是利用電(dian)(dian)力捕(bu)集煙氣(qi)中的(de)粉塵(chen),主要(yao)包括以下四個相(xiang)互有關的(de)物理(li)過程: (1) 氣(qi)體的(de)電(dian)(dian)離。(2) 粉塵(chen)的(de)荷電(dian)(dian)。(3) 荷電(dian)(dian)粉塵(chen)向電(dian)(dian)極移動。(4) 荷電(dian)(dian)粉塵(chen)的(de)捕(bu)集。