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)器是(shi)以靜電(dian)(dian)(dian)(dian)凈(jing)化(hua)法來(lai)收捕廢氣中(zhong)的(de)(de)(de)(de)(de)粉塵(chen)(chen),它的(de)(de)(de)(de)(de)凈(jing)化(hua)工(gong)作(zuo)(zuo)上(shang)(shang)要是(shi)依靠(kao)電(dian)(dian)(dian)(dian)暈(yun)極(ji)(ji)和(he)沉淀兩個系統來(lai)完(wan)成的(de)(de)(de)(de)(de),當含塵(chen)(chen)氣體(ti)(ti)(ti)進(jin)(jin)人氣刺叭(ba)時,含塵(chen)(chen)氣體(ti)(ti)(ti)受到氣流(liu)(liu)分布板以及折(zhe)流(liu)(liu)板的(de)(de)(de)(de)(de)調整后,使(shi)(shi)(shi)氣流(liu)(liu)能(neng)較均勻地進(jin)(jin)人電(dian)(dian)(dian)(dian)場(chang)。在橫斷面擴(kuo)大的(de)(de)(de)(de)(de)作(zuo)(zuo)用下,氣流(liu)(liu)速(su)度(du)迅速(su)降低,其中(zhong)有(you)些(xie)(xie)較重的(de)(de)(de)(de)(de)塵(chen)(chen)粒(li)(li)便失去速(su)度(du)而沉降下來(lai)。進(jin)(jin)人電(dian)(dian)(dian)(dian)場(chang)的(de)(de)(de)(de)(de)含塵(chen)(chen)氣體(ti)(ti)(ti)由于電(dian)(dian)(dian)(dian)暈(yun)極(ji)(ji)通(tong)人高壓直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian),則在電(dian)(dian)(dian)(dian)暈(yun)極(ji)(ji)附(fu)近(jin)產生電(dian)(dian)(dian)(dian)暈(yun)現象,使(shi)(shi)(shi)氣體(ti)(ti)(ti)電(dian)(dian)(dian)(dian)離(li)(li),電(dian)(dian)(dian)(dian)離(li)(li)后的(de)(de)(de)(de)(de)氣體(ti)(ti)(ti)中(zhong)存在大量的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)子和(he)離(li)(li)子,這些(xie)(xie)電(dian)(dian)(dian)(dian)子和(he)離(li)(li)子與(yu)進(jin)(jin)人電(dian)(dian)(dian)(dian)場(chang)的(de)(de)(de)(de)(de)粉塵(chen)(chen)結合起來(lai),使(shi)(shi)(shi)塵(chen)(chen)粒(li)(li)帶電(dian)(dian)(dian)(dian),帶電(dian)(dian)(dian)(dian)塵(chen)(chen)粒(li)(li)在電(dian)(dian)(dian)(dian)場(chang)力的(de)(de)(de)(de)(de)作(zuo)(zuo)用下趨向本設備(bei)陽(yang)極(ji)(ji)(正(zheng)極(ji)(ji)、本設備(bei)采用負高壓制)和(he)陰極(ji)(ji)(負極(ji)(ji)) , 釋放(fang)出電(dian)(dian)(dian)(dian)子分別沉積在相應的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)極(ji)(ji)上(shang)(shang),通(tong)過(guo)設備(bei)陰陽(yang)極(ji)(ji)振打系統的(de)(de)(de)(de)(de)振打,使(shi)(shi)(shi)沉積在陰陽(yang)電(dian)(dian)(dian)(dian)極(ji)(ji)上(shang)(shang)的(de)(de)(de)(de)(de)粉塵(chen)(chen)振落,進(jin)(jin)人集(ji)灰(hui)斗 通(tong)過(guo)排灰(hui)裝(zhuang)置放(fang)出,回(hui)收有(you)物料,被)凈(jing)化(hua)的(de)(de)(de)(de)(de)氣體(ti)(ti)(ti)排入大氣。
工(gong)作原理
靜電(dian)(dian)(dian)(dian)(dian)(dian)除(chu)塵(chen)(chen)器(qi)的(de)(de)(de)工作(zuo)原理是(shi)利(li)用高壓電(dian)(dian)(dian)(dian)(dian)(dian)場使煙(yan)氣發(fa)生電(dian)(dian)(dian)(dian)(dian)(dian)離(li),氣流(liu)中(zhong)的(de)(de)(de)粉塵(chen)(chen)荷(he)電(dian)(dian)(dian)(dian)(dian)(dian)在電(dian)(dian)(dian)(dian)(dian)(dian)場作(zuo)用下與氣流(liu)分離(li)。負極(ji)(ji)由不(bu)同斷面形(xing)狀(zhuang)(zhuang)的(de)(de)(de)金(jin)屬(shu)導線制(zhi)成,叫(jiao)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)。正極(ji)(ji)由不(bu)同幾(ji)何形(xing)狀(zhuang)(zhuang)的(de)(de)(de)金(jin)屬(shu)板制(zhi)成,叫(jiao)集塵(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)。靜電(dian)(dian)(dian)(dian)(dian)(dian)除(chu)塵(chen)(chen)器(qi)的(de)(de)(de)性(xing)(xing)能受粉塵(chen)(chen)性(xing)(xing)質、設備(bei)構造(zao)和煙(yan)氣流(liu)速等(deng)三(san)個因素(su)的(de)(de)(de)影(ying)響。粉塵(chen)(chen)的(de)(de)(de)比電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)是(shi)評價導電(dian)(dian)(dian)(dian)(dian)(dian)性(xing)(xing)的(de)(de)(de)指標,它對除(chu)塵(chen)(chen)效率(lv)有直接的(de)(de)(de)影(ying)響。比電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)過(guo)低,塵(chen)(chen)粒(li)難以(yi)保(bao)持在集塵(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)上,致(zhi)使其重返氣流(liu)。比電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)過(guo)高,到達集塵(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)的(de)(de)(de)塵(chen)(chen)粒(li)電(dian)(dian)(dian)(dian)(dian)(dian)荷(he)不(bu)易放(fang)出,在塵(chen)(chen)層之間形(xing)成電(dian)(dian)(dian)(dian)(dian)(dian)壓梯(ti)度會產生局部(bu)擊穿(chuan)和放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)現象(xiang)。這些情況都會造(zao)成除(chu)塵(chen)(chen)效率(lv)下降。
電(dian)(dian)除塵器的基本原理(li)是利用電(dian)(dian)力(li)捕集煙氣中的粉塵,主要包括以(yi)下四個(ge)相互有關的物(wu)理(li)過程: (1) 氣體的電(dian)(dian)離。(2) 粉塵的荷(he)電(dian)(dian)。(3) 荷(he)電(dian)(dian)粉塵向電(dian)(dian)極移動。(4) 荷(he)電(dian)(dian)粉塵的捕集。