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)(dian)除塵(chen)(chen)(chen)器是以靜電(dian)(dian)(dian)(dian)(dian)(dian)凈化(hua)(hua)(hua)法來收(shou)捕廢(fei)氣(qi)中(zhong)的(de)(de)(de)(de)粉塵(chen)(chen)(chen),它的(de)(de)(de)(de)凈化(hua)(hua)(hua)工作上要(yao)是依(yi)靠電(dian)(dian)(dian)(dian)(dian)(dian)暈極(ji)(ji)和(he)沉淀兩(liang)個系統來完成的(de)(de)(de)(de),當(dang)含塵(chen)(chen)(chen)氣(qi)體(ti)進人(ren)(ren)氣(qi)刺叭時,含塵(chen)(chen)(chen)氣(qi)體(ti)受到氣(qi)流(liu)分(fen)布板(ban)以及折(zhe)流(liu)板(ban)的(de)(de)(de)(de)調整后(hou),使(shi)氣(qi)流(liu)能較(jiao)均勻地進人(ren)(ren)電(dian)(dian)(dian)(dian)(dian)(dian)場。在(zai)橫(heng)斷面擴大的(de)(de)(de)(de)作用(yong)下(xia)(xia),氣(qi)流(liu)速度迅速降低,其中(zhong)有些較(jiao)重(zhong)的(de)(de)(de)(de)塵(chen)(chen)(chen)粒便失去速度而沉降下(xia)(xia)來。進人(ren)(ren)電(dian)(dian)(dian)(dian)(dian)(dian)場的(de)(de)(de)(de)含塵(chen)(chen)(chen)氣(qi)體(ti)由于電(dian)(dian)(dian)(dian)(dian)(dian)暈極(ji)(ji)通(tong)人(ren)(ren)高(gao)壓直流(liu)電(dian)(dian)(dian)(dian)(dian)(dian),則(ze)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)暈極(ji)(ji)附近產(chan)生電(dian)(dian)(dian)(dian)(dian)(dian)暈現象,使(shi)氣(qi)體(ti)電(dian)(dian)(dian)(dian)(dian)(dian)離(li),電(dian)(dian)(dian)(dian)(dian)(dian)離(li)后(hou)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)(dian)(dian)(dian)子和(he)離(li)子,這些電(dian)(dian)(dian)(dian)(dian)(dian)子和(he)離(li)子與進人(ren)(ren)電(dian)(dian)(dian)(dian)(dian)(dian)場的(de)(de)(de)(de)粉塵(chen)(chen)(chen)結合起來,使(shi)塵(chen)(chen)(chen)粒帶(dai)電(dian)(dian)(dian)(dian)(dian)(dian),帶(dai)電(dian)(dian)(dian)(dian)(dian)(dian)塵(chen)(chen)(chen)粒在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)場力(li)的(de)(de)(de)(de)作用(yong)下(xia)(xia)趨向本設(she)備(bei)陽極(ji)(ji)(正極(ji)(ji)、本設(she)備(bei)采用(yong)負(fu)高(gao)壓制(zhi))和(he)陰極(ji)(ji)(負(fu)極(ji)(ji)) , 釋放(fang)出電(dian)(dian)(dian)(dian)(dian)(dian)子分(fen)別沉積在(zai)相(xiang)應的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)上,通(tong)過(guo)設(she)備(bei)陰陽極(ji)(ji)振打(da)系統的(de)(de)(de)(de)振打(da),使(shi)沉積在(zai)陰陽電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)上的(de)(de)(de)(de)粉塵(chen)(chen)(chen)振落(luo),進人(ren)(ren)集灰斗 通(tong)過(guo)排灰裝置放(fang)出,回收(shou)有物料(liao),被(bei))凈化(hua)(hua)(hua)的(de)(de)(de)(de)氣(qi)體(ti)排入大氣(qi)。
工(gong)作原理
靜(jing)電(dian)(dian)(dian)(dian)(dian)除塵(chen)器的(de)工(gong)作(zuo)原理是(shi)利用高(gao)壓電(dian)(dian)(dian)(dian)(dian)場使煙(yan)氣(qi)(qi)發生(sheng)電(dian)(dian)(dian)(dian)(dian)離,氣(qi)(qi)流中(zhong)的(de)粉塵(chen)荷(he)(he)電(dian)(dian)(dian)(dian)(dian)在電(dian)(dian)(dian)(dian)(dian)場作(zuo)用下與氣(qi)(qi)流分離。負極(ji)由不同(tong)斷面形狀的(de)金屬導線制成,叫放電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)極(ji)。正極(ji)由不同(tong)幾何形狀的(de)金屬板(ban)制成,叫集(ji)塵(chen)電(dian)(dian)(dian)(dian)(dian)極(ji)。靜(jing)電(dian)(dian)(dian)(dian)(dian)除塵(chen)器的(de)性能受粉塵(chen)性質、設(she)備(bei)構造(zao)(zao)和煙(yan)氣(qi)(qi)流速等三(san)個(ge)因(yin)素(su)的(de)影響(xiang)。粉塵(chen)的(de)比(bi)電(dian)(dian)(dian)(dian)(dian)阻(zu)是(shi)評(ping)價導電(dian)(dian)(dian)(dian)(dian)性的(de)指標,它(ta)對除塵(chen)效(xiao)率有直(zhi)接的(de)影響(xiang)。比(bi)電(dian)(dian)(dian)(dian)(dian)阻(zu)過(guo)低,塵(chen)粒難以保持在集(ji)塵(chen)電(dian)(dian)(dian)(dian)(dian)極(ji)上(shang),致使其重返(fan)氣(qi)(qi)流。比(bi)電(dian)(dian)(dian)(dian)(dian)阻(zu)過(guo)高(gao),到(dao)達集(ji)塵(chen)電(dian)(dian)(dian)(dian)(dian)極(ji)的(de)塵(chen)粒電(dian)(dian)(dian)(dian)(dian)荷(he)(he)不易放出,在塵(chen)層(ceng)之間形成電(dian)(dian)(dian)(dian)(dian)壓梯度會產生(sheng)局部擊穿和放電(dian)(dian)(dian)(dian)(dian)現象。這些情(qing)況都會造(zao)(zao)成除塵(chen)效(xiao)率下降。
電(dian)除(chu)塵器的(de)(de)基本(ben)原理是利用電(dian)力(li)捕集(ji)煙氣(qi)中的(de)(de)粉(fen)(fen)塵,主(zhu)要(yao)包括以(yi)下四個相互有關的(de)(de)物理過程: (1) 氣(qi)體(ti)的(de)(de)電(dian)離。(2) 粉(fen)(fen)塵的(de)(de)荷(he)電(dian)。(3) 荷(he)電(dian)粉(fen)(fen)塵向電(dian)極移動。(4) 荷(he)電(dian)粉(fen)(fen)塵的(de)(de)捕集(ji)。