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)除塵(chen)(chen)(chen)(chen)器是(shi)以靜電(dian)(dian)(dian)(dian)凈(jing)(jing)化法來(lai)收捕(bu)廢氣中的(de)(de)粉塵(chen)(chen)(chen)(chen),它的(de)(de)凈(jing)(jing)化工作(zuo)上要是(shi)依靠電(dian)(dian)(dian)(dian)暈極和(he)沉淀兩個系統(tong)(tong)來(lai)完(wan)成的(de)(de),當(dang)含塵(chen)(chen)(chen)(chen)氣體進人(ren)(ren)氣刺叭時(shi),含塵(chen)(chen)(chen)(chen)氣體受到氣流(liu)分(fen)(fen)布板以及折流(liu)板的(de)(de)調整后,使氣流(liu)能較均勻地進人(ren)(ren)電(dian)(dian)(dian)(dian)場(chang)(chang)。在橫斷面擴大(da)的(de)(de)作(zuo)用(yong)下(xia),氣流(liu)速(su)度迅速(su)降低,其(qi)中有(you)些(xie)較重的(de)(de)塵(chen)(chen)(chen)(chen)粒(li)便失(shi)去(qu)速(su)度而沉降下(xia)來(lai)。進人(ren)(ren)電(dian)(dian)(dian)(dian)場(chang)(chang)的(de)(de)含塵(chen)(chen)(chen)(chen)氣體由于(yu)電(dian)(dian)(dian)(dian)暈極通人(ren)(ren)高(gao)壓(ya)直(zhi)流(liu)電(dian)(dian)(dian)(dian),則在電(dian)(dian)(dian)(dian)暈極附(fu)近產生電(dian)(dian)(dian)(dian)暈現象,使氣體電(dian)(dian)(dian)(dian)離(li),電(dian)(dian)(dian)(dian)離(li)后的(de)(de)氣體中存在大(da)量的(de)(de)電(dian)(dian)(dian)(dian)子(zi)(zi)和(he)離(li)子(zi)(zi),這些(xie)電(dian)(dian)(dian)(dian)子(zi)(zi)和(he)離(li)子(zi)(zi)與進人(ren)(ren)電(dian)(dian)(dian)(dian)場(chang)(chang)的(de)(de)粉塵(chen)(chen)(chen)(chen)結合起來(lai),使塵(chen)(chen)(chen)(chen)粒(li)帶電(dian)(dian)(dian)(dian),帶電(dian)(dian)(dian)(dian)塵(chen)(chen)(chen)(chen)粒(li)在電(dian)(dian)(dian)(dian)場(chang)(chang)力的(de)(de)作(zuo)用(yong)下(xia)趨(qu)向本設(she)備陽(yang)極(正極、本設(she)備采用(yong)負高(gao)壓(ya)制)和(he)陰極(負極) , 釋放出(chu)電(dian)(dian)(dian)(dian)子(zi)(zi)分(fen)(fen)別(bie)沉積(ji)在相應的(de)(de)電(dian)(dian)(dian)(dian)極上,通過設(she)備陰陽(yang)極振打系統(tong)(tong)的(de)(de)振打,使沉積(ji)在陰陽(yang)電(dian)(dian)(dian)(dian)極上的(de)(de)粉塵(chen)(chen)(chen)(chen)振落,進人(ren)(ren)集灰斗 通過排灰裝置放出(chu),回收有(you)物料,被)凈(jing)(jing)化的(de)(de)氣體排入大(da)氣。
工作原(yuan)理
靜(jing)(jing)電(dian)(dian)除塵(chen)器的(de)(de)(de)工(gong)作(zuo)原理(li)是利(li)用高(gao)壓(ya)(ya)電(dian)(dian)場(chang)使(shi)煙(yan)氣發生電(dian)(dian)離,氣流中(zhong)的(de)(de)(de)粉(fen)塵(chen)荷電(dian)(dian)在電(dian)(dian)場(chang)作(zuo)用下(xia)與氣流分(fen)離。負(fu)極由(you)不同(tong)斷面形狀的(de)(de)(de)金屬導(dao)線(xian)制成,叫(jiao)放電(dian)(dian)電(dian)(dian)極。正極由(you)不同(tong)幾何(he)形狀的(de)(de)(de)金屬板(ban)制成,叫(jiao)集(ji)塵(chen)電(dian)(dian)極。靜(jing)(jing)電(dian)(dian)除塵(chen)器的(de)(de)(de)性(xing)能受粉(fen)塵(chen)性(xing)質、設備構造(zao)和煙(yan)氣流速等(deng)三個因素的(de)(de)(de)影(ying)響。粉(fen)塵(chen)的(de)(de)(de)比電(dian)(dian)阻(zu)是評價導(dao)電(dian)(dian)性(xing)的(de)(de)(de)指(zhi)標,它(ta)對(dui)除塵(chen)效(xiao)率有直接的(de)(de)(de)影(ying)響。比電(dian)(dian)阻(zu)過低,塵(chen)粒(li)難以保持在集(ji)塵(chen)電(dian)(dian)極上,致(zhi)使(shi)其重(zhong)返(fan)氣流。比電(dian)(dian)阻(zu)過高(gao),到(dao)達集(ji)塵(chen)電(dian)(dian)極的(de)(de)(de)塵(chen)粒(li)電(dian)(dian)荷不易放出,在塵(chen)層之間形成電(dian)(dian)壓(ya)(ya)梯度會產生局部擊穿和放電(dian)(dian)現象。這些情(qing)況都會造(zao)成除塵(chen)效(xiao)率下(xia)降。
電(dian)除塵器的(de)(de)(de)基本原(yuan)理是利(li)用電(dian)力捕集煙氣中的(de)(de)(de)粉(fen)塵,主要包括以下四(si)個(ge)相互有關的(de)(de)(de)物理過程: (1) 氣體的(de)(de)(de)電(dian)離。(2) 粉(fen)塵的(de)(de)(de)荷電(dian)。(3) 荷電(dian)粉(fen)塵向電(dian)極移動。(4) 荷電(dian)粉(fen)塵的(de)(de)(de)捕集。