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(jing)電(dian)(dian)(dian)除(chu)塵(chen)(chen)器是(shi)以靜(jing)電(dian)(dian)(dian)凈(jing)化(hua)法來(lai)收(shou)捕(bu)廢氣(qi)(qi)(qi)中的(de)(de)(de)粉塵(chen)(chen),它(ta)的(de)(de)(de)凈(jing)化(hua)工作上(shang)(shang)要是(shi)依靠電(dian)(dian)(dian)暈(yun)極(ji)和沉(chen)淀(dian)兩個(ge)系統來(lai)完成的(de)(de)(de),當含(han)(han)塵(chen)(chen)氣(qi)(qi)(qi)體(ti)(ti)進(jin)(jin)(jin)人氣(qi)(qi)(qi)刺叭時,含(han)(han)塵(chen)(chen)氣(qi)(qi)(qi)體(ti)(ti)受(shou)到氣(qi)(qi)(qi)流分(fen)(fen)布板以及(ji)折流板的(de)(de)(de)調整后,使(shi)(shi)氣(qi)(qi)(qi)流能較(jiao)均勻(yun)地(di)進(jin)(jin)(jin)人電(dian)(dian)(dian)場(chang)。在(zai)橫斷面擴大的(de)(de)(de)作用(yong)(yong)下(xia),氣(qi)(qi)(qi)流速(su)度迅(xun)速(su)降低,其中有些較(jiao)重的(de)(de)(de)塵(chen)(chen)粒便失去速(su)度而沉(chen)降下(xia)來(lai)。進(jin)(jin)(jin)人電(dian)(dian)(dian)場(chang)的(de)(de)(de)含(han)(han)塵(chen)(chen)氣(qi)(qi)(qi)體(ti)(ti)由于電(dian)(dian)(dian)暈(yun)極(ji)通人高(gao)壓直(zhi)流電(dian)(dian)(dian),則在(zai)電(dian)(dian)(dian)暈(yun)極(ji)附(fu)近產(chan)生電(dian)(dian)(dian)暈(yun)現象,使(shi)(shi)氣(qi)(qi)(qi)體(ti)(ti)電(dian)(dian)(dian)離(li)(li),電(dian)(dian)(dian)離(li)(li)后的(de)(de)(de)氣(qi)(qi)(qi)體(ti)(ti)中存在(zai)大量的(de)(de)(de)電(dian)(dian)(dian)子和離(li)(li)子,這些電(dian)(dian)(dian)子和離(li)(li)子與進(jin)(jin)(jin)人電(dian)(dian)(dian)場(chang)的(de)(de)(de)粉塵(chen)(chen)結合起來(lai),使(shi)(shi)塵(chen)(chen)粒帶電(dian)(dian)(dian),帶電(dian)(dian)(dian)塵(chen)(chen)粒在(zai)電(dian)(dian)(dian)場(chang)力的(de)(de)(de)作用(yong)(yong)下(xia)趨向本設備陽(yang)極(ji)(正極(ji)、本設備采(cai)用(yong)(yong)負(fu)高(gao)壓制(zhi))和陰極(ji)(負(fu)極(ji)) , 釋放出電(dian)(dian)(dian)子分(fen)(fen)別沉(chen)積在(zai)相(xiang)應(ying)的(de)(de)(de)電(dian)(dian)(dian)極(ji)上(shang)(shang),通過設備陰陽(yang)極(ji)振(zhen)(zhen)打系統的(de)(de)(de)振(zhen)(zhen)打,使(shi)(shi)沉(chen)積在(zai)陰陽(yang)電(dian)(dian)(dian)極(ji)上(shang)(shang)的(de)(de)(de)粉塵(chen)(chen)振(zhen)(zhen)落,進(jin)(jin)(jin)人集灰斗 通過排(pai)(pai)灰裝(zhuang)置放出,回(hui)收(shou)有物料,被)凈(jing)化(hua)的(de)(de)(de)氣(qi)(qi)(qi)體(ti)(ti)排(pai)(pai)入大氣(qi)(qi)(qi)。
工作(zuo)原理
靜電(dian)(dian)除(chu)塵(chen)器(qi)的(de)工(gong)作原理(li)是(shi)利(li)用高壓電(dian)(dian)場(chang)使(shi)煙(yan)氣(qi)(qi)(qi)發生電(dian)(dian)離,氣(qi)(qi)(qi)流(liu)中的(de)粉(fen)塵(chen)荷電(dian)(dian)在電(dian)(dian)場(chang)作用下與氣(qi)(qi)(qi)流(liu)分離。負極由(you)不(bu)同(tong)斷面形狀的(de)金屬導線制(zhi)(zhi)成,叫(jiao)放電(dian)(dian)電(dian)(dian)極。正極由(you)不(bu)同(tong)幾(ji)何形狀的(de)金屬板(ban)制(zhi)(zhi)成,叫(jiao)集(ji)(ji)塵(chen)電(dian)(dian)極。靜電(dian)(dian)除(chu)塵(chen)器(qi)的(de)性(xing)能受粉(fen)塵(chen)性(xing)質(zhi)、設備構造(zao)和煙(yan)氣(qi)(qi)(qi)流(liu)速等三個因(yin)素的(de)影響。粉(fen)塵(chen)的(de)比(bi)(bi)電(dian)(dian)阻(zu)是(shi)評(ping)價導電(dian)(dian)性(xing)的(de)指標,它對除(chu)塵(chen)效率有直接的(de)影響。比(bi)(bi)電(dian)(dian)阻(zu)過低,塵(chen)粒(li)難以保持在集(ji)(ji)塵(chen)電(dian)(dian)極上,致使(shi)其(qi)重(zhong)返氣(qi)(qi)(qi)流(liu)。比(bi)(bi)電(dian)(dian)阻(zu)過高,到達集(ji)(ji)塵(chen)電(dian)(dian)極的(de)塵(chen)粒(li)電(dian)(dian)荷不(bu)易放出,在塵(chen)層之間形成電(dian)(dian)壓梯度(du)會產生局部(bu)擊穿和放電(dian)(dian)現象。這些情況都(dou)會造(zao)成除(chu)塵(chen)效率下降(jiang)。
電除(chu)塵(chen)器(qi)的(de)基本原理是利用(yong)電力捕(bu)集(ji)煙氣中的(de)粉塵(chen),主要包括以下四(si)個相互有關的(de)物理過(guo)程: (1) 氣體(ti)的(de)電離。(2) 粉塵(chen)的(de)荷(he)電。(3) 荷(he)電粉塵(chen)向電極移動(dong)。(4) 荷(he)電粉塵(chen)的(de)捕(bu)集(ji)。