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)(dian)(dian)除塵(chen)(chen)器是(shi)以靜電(dian)(dian)(dian)(dian)(dian)凈(jing)化(hua)(hua)法來收捕(bu)廢(fei)氣(qi)(qi)中(zhong)的(de)粉(fen)塵(chen)(chen),它的(de)凈(jing)化(hua)(hua)工作(zuo)上要是(shi)依靠(kao)電(dian)(dian)(dian)(dian)(dian)暈(yun)極和(he)(he)沉(chen)淀兩個系統(tong)(tong)來完成的(de),當含(han)(han)塵(chen)(chen)氣(qi)(qi)體進(jin)(jin)人(ren)(ren)氣(qi)(qi)刺叭時,含(han)(han)塵(chen)(chen)氣(qi)(qi)體受到氣(qi)(qi)流分布板(ban)以及折流板(ban)的(de)調整后,使(shi)(shi)氣(qi)(qi)流能較均勻地進(jin)(jin)人(ren)(ren)電(dian)(dian)(dian)(dian)(dian)場。在(zai)(zai)橫斷面擴大的(de)作(zuo)用(yong)下,氣(qi)(qi)流速度迅(xun)速降低(di),其中(zhong)有些(xie)(xie)較重的(de)塵(chen)(chen)粒便失去(qu)速度而沉(chen)降下來。進(jin)(jin)人(ren)(ren)電(dian)(dian)(dian)(dian)(dian)場的(de)含(han)(han)塵(chen)(chen)氣(qi)(qi)體由于電(dian)(dian)(dian)(dian)(dian)暈(yun)極通(tong)人(ren)(ren)高壓直流電(dian)(dian)(dian)(dian)(dian),則在(zai)(zai)電(dian)(dian)(dian)(dian)(dian)暈(yun)極附(fu)近產生電(dian)(dian)(dian)(dian)(dian)暈(yun)現象(xiang),使(shi)(shi)氣(qi)(qi)體電(dian)(dian)(dian)(dian)(dian)離(li),電(dian)(dian)(dian)(dian)(dian)離(li)后的(de)氣(qi)(qi)體中(zhong)存在(zai)(zai)大量(liang)的(de)電(dian)(dian)(dian)(dian)(dian)子和(he)(he)離(li)子,這些(xie)(xie)電(dian)(dian)(dian)(dian)(dian)子和(he)(he)離(li)子與進(jin)(jin)人(ren)(ren)電(dian)(dian)(dian)(dian)(dian)場的(de)粉(fen)塵(chen)(chen)結合起(qi)來,使(shi)(shi)塵(chen)(chen)粒帶電(dian)(dian)(dian)(dian)(dian),帶電(dian)(dian)(dian)(dian)(dian)塵(chen)(chen)粒在(zai)(zai)電(dian)(dian)(dian)(dian)(dian)場力的(de)作(zuo)用(yong)下趨(qu)向本設備(bei)(bei)陽(yang)極(正(zheng)極、本設備(bei)(bei)采用(yong)負高壓制)和(he)(he)陰極(負極) , 釋放(fang)出電(dian)(dian)(dian)(dian)(dian)子分別(bie)沉(chen)積在(zai)(zai)相應的(de)電(dian)(dian)(dian)(dian)(dian)極上,通(tong)過設備(bei)(bei)陰陽(yang)極振(zhen)(zhen)打(da)系統(tong)(tong)的(de)振(zhen)(zhen)打(da),使(shi)(shi)沉(chen)積在(zai)(zai)陰陽(yang)電(dian)(dian)(dian)(dian)(dian)極上的(de)粉(fen)塵(chen)(chen)振(zhen)(zhen)落,進(jin)(jin)人(ren)(ren)集灰(hui)斗 通(tong)過排灰(hui)裝置放(fang)出,回收有物料,被)凈(jing)化(hua)(hua)的(de)氣(qi)(qi)體排入大氣(qi)(qi)。
工作原(yuan)理
靜電(dian)(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)(chen)器(qi)的(de)(de)工(gong)作(zuo)原(yuan)理是利(li)用高壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)使(shi)煙氣發生電(dian)(dian)(dian)(dian)(dian)(dian)(dian)離(li)(li),氣流中的(de)(de)粉(fen)塵(chen)(chen)(chen)(chen)(chen)荷電(dian)(dian)(dian)(dian)(dian)(dian)(dian)在電(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)作(zuo)用下與氣流分離(li)(li)。負極由(you)不同斷面形狀的(de)(de)金屬導(dao)線制(zhi)成(cheng),叫放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極。正極由(you)不同幾何形狀的(de)(de)金屬板制(zhi)成(cheng),叫集(ji)塵(chen)(chen)(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極。靜電(dian)(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)(chen)器(qi)的(de)(de)性(xing)能(neng)受粉(fen)塵(chen)(chen)(chen)(chen)(chen)性(xing)質、設備構造和(he)煙氣流速等三(san)個因素的(de)(de)影響。粉(fen)塵(chen)(chen)(chen)(chen)(chen)的(de)(de)比電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)是評價導(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)性(xing)的(de)(de)指標,它對除塵(chen)(chen)(chen)(chen)(chen)效率有直(zhi)接的(de)(de)影響。比電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)過低(di),塵(chen)(chen)(chen)(chen)(chen)粒(li)難以保持在集(ji)塵(chen)(chen)(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極上,致使(shi)其重返氣流。比電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)過高,到達集(ji)塵(chen)(chen)(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極的(de)(de)塵(chen)(chen)(chen)(chen)(chen)粒(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)荷不易放出,在塵(chen)(chen)(chen)(chen)(chen)層之(zhi)間形成(cheng)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)梯(ti)度會(hui)產(chan)生局(ju)部擊穿和(he)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)現象(xiang)。這些情況(kuang)都會(hui)造成(cheng)除塵(chen)(chen)(chen)(chen)(chen)效率下降。
電除塵(chen)(chen)器的基本原(yuan)理是利(li)用電力捕集煙氣中(zhong)的粉塵(chen)(chen),主要包括(kuo)以下四個(ge)相互有關的物(wu)理過程: (1) 氣體的電離。(2) 粉塵(chen)(chen)的荷電。(3) 荷電粉塵(chen)(chen)向電極移動。(4) 荷電粉塵(chen)(chen)的捕集。