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)靜電(dian)(dian)(dian)(dian)(dian)除(chu)塵(chen)(chen)(chen)器(qi)是以靜電(dian)(dian)(dian)(dian)(dian)凈化(hua)法來收捕廢氣(qi)中的(de)(de)粉(fen)塵(chen)(chen)(chen),它(ta)的(de)(de)凈化(hua)工作(zuo)上要是依靠(kao)電(dian)(dian)(dian)(dian)(dian)暈極和沉(chen)淀兩(liang)個系統來完成的(de)(de),當含塵(chen)(chen)(chen)氣(qi)體(ti)(ti)進(jin)(jin)(jin)人(ren)氣(qi)刺叭時,含塵(chen)(chen)(chen)氣(qi)體(ti)(ti)受到氣(qi)流(liu)分(fen)布(bu)板(ban)以及(ji)折流(liu)板(ban)的(de)(de)調(diao)整后,使(shi)(shi)氣(qi)流(liu)能(neng)較均勻地進(jin)(jin)(jin)人(ren)電(dian)(dian)(dian)(dian)(dian)場(chang)(chang)。在橫斷面擴(kuo)大(da)(da)的(de)(de)作(zuo)用(yong)下(xia),氣(qi)流(liu)速度(du)迅速降(jiang)低,其中有(you)(you)些(xie)較重的(de)(de)塵(chen)(chen)(chen)粒便失去速度(du)而沉(chen)降(jiang)下(xia)來。進(jin)(jin)(jin)人(ren)電(dian)(dian)(dian)(dian)(dian)場(chang)(chang)的(de)(de)含塵(chen)(chen)(chen)氣(qi)體(ti)(ti)由(you)于電(dian)(dian)(dian)(dian)(dian)暈極通(tong)人(ren)高(gao)壓直流(liu)電(dian)(dian)(dian)(dian)(dian),則在電(dian)(dian)(dian)(dian)(dian)暈極附近(jin)產生電(dian)(dian)(dian)(dian)(dian)暈現象,使(shi)(shi)氣(qi)體(ti)(ti)電(dian)(dian)(dian)(dian)(dian)離(li),電(dian)(dian)(dian)(dian)(dian)離(li)后的(de)(de)氣(qi)體(ti)(ti)中存(cun)在大(da)(da)量的(de)(de)電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)和離(li)子(zi)(zi),這些(xie)電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)和離(li)子(zi)(zi)與進(jin)(jin)(jin)人(ren)電(dian)(dian)(dian)(dian)(dian)場(chang)(chang)的(de)(de)粉(fen)塵(chen)(chen)(chen)結合起來,使(shi)(shi)塵(chen)(chen)(chen)粒帶(dai)電(dian)(dian)(dian)(dian)(dian),帶(dai)電(dian)(dian)(dian)(dian)(dian)塵(chen)(chen)(chen)粒在電(dian)(dian)(dian)(dian)(dian)場(chang)(chang)力的(de)(de)作(zuo)用(yong)下(xia)趨向(xiang)本設備陽極(正極、本設備采(cai)用(yong)負(fu)(fu)高(gao)壓制)和陰極(負(fu)(fu)極) , 釋放出(chu)電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)分(fen)別(bie)沉(chen)積在相應的(de)(de)電(dian)(dian)(dian)(dian)(dian)極上,通(tong)過(guo)設備陰陽極振(zhen)打(da)系統的(de)(de)振(zhen)打(da),使(shi)(shi)沉(chen)積在陰陽電(dian)(dian)(dian)(dian)(dian)極上的(de)(de)粉(fen)塵(chen)(chen)(chen)振(zhen)落(luo),進(jin)(jin)(jin)人(ren)集(ji)灰斗 通(tong)過(guo)排灰裝(zhuang)置放出(chu),回收有(you)(you)物料,被)凈化(hua)的(de)(de)氣(qi)體(ti)(ti)排入大(da)(da)氣(qi)。
工作原(yuan)理
靜(jing)電(dian)(dian)(dian)(dian)除(chu)(chu)塵(chen)(chen)器(qi)的(de)(de)工作原理是(shi)利用(yong)(yong)高(gao)壓(ya)電(dian)(dian)(dian)(dian)場使煙氣(qi)(qi)發生電(dian)(dian)(dian)(dian)離,氣(qi)(qi)流(liu)中的(de)(de)粉塵(chen)(chen)荷電(dian)(dian)(dian)(dian)在電(dian)(dian)(dian)(dian)場作用(yong)(yong)下與氣(qi)(qi)流(liu)分離。負極由不(bu)(bu)同斷面(mian)形狀的(de)(de)金屬(shu)導線(xian)制(zhi)成(cheng),叫放電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)極。正極由不(bu)(bu)同幾何形狀的(de)(de)金屬(shu)板制(zhi)成(cheng),叫集塵(chen)(chen)電(dian)(dian)(dian)(dian)極。靜(jing)電(dian)(dian)(dian)(dian)除(chu)(chu)塵(chen)(chen)器(qi)的(de)(de)性能受粉塵(chen)(chen)性質、設(she)備構造和煙氣(qi)(qi)流(liu)速等(deng)三(san)個因(yin)素的(de)(de)影響。粉塵(chen)(chen)的(de)(de)比(bi)電(dian)(dian)(dian)(dian)阻(zu)(zu)是(shi)評價導電(dian)(dian)(dian)(dian)性的(de)(de)指標,它對(dui)除(chu)(chu)塵(chen)(chen)效率有直接的(de)(de)影響。比(bi)電(dian)(dian)(dian)(dian)阻(zu)(zu)過低,塵(chen)(chen)粒(li)難(nan)以保持在集塵(chen)(chen)電(dian)(dian)(dian)(dian)極上,致(zhi)使其重返氣(qi)(qi)流(liu)。比(bi)電(dian)(dian)(dian)(dian)阻(zu)(zu)過高(gao),到達集塵(chen)(chen)電(dian)(dian)(dian)(dian)極的(de)(de)塵(chen)(chen)粒(li)電(dian)(dian)(dian)(dian)荷不(bu)(bu)易放出(chu),在塵(chen)(chen)層之間形成(cheng)電(dian)(dian)(dian)(dian)壓(ya)梯(ti)度會產生局部擊穿和放電(dian)(dian)(dian)(dian)現(xian)象(xiang)。這些情況都會造成(cheng)除(chu)(chu)塵(chen)(chen)效率下降。
電(dian)除塵(chen)(chen)器(qi)的(de)基本原(yuan)理(li)是利用電(dian)力捕(bu)(bu)集煙氣中的(de)粉塵(chen)(chen),主要包括以下四(si)個相互有關(guan)的(de)物(wu)理(li)過(guo)程: (1) 氣體(ti)的(de)電(dian)離。(2) 粉塵(chen)(chen)的(de)荷(he)電(dian)。(3) 荷(he)電(dian)粉塵(chen)(chen)向電(dian)極移(yi)動。(4) 荷(he)電(dian)粉塵(chen)(chen)的(de)捕(bu)(bu)集。