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)除塵器是以靜電(dian)(dian)凈(jing)化(hua)(hua)法(fa)來(lai)收捕廢氣(qi)(qi)中的(de)(de)(de)(de)粉塵,它的(de)(de)(de)(de)凈(jing)化(hua)(hua)工作(zuo)上(shang)要是依(yi)靠(kao)電(dian)(dian)暈(yun)(yun)極(ji)(ji)(ji)和沉(chen)(chen)淀兩個系統來(lai)完成的(de)(de)(de)(de),當(dang)含塵氣(qi)(qi)體(ti)進人氣(qi)(qi)刺(ci)叭時(shi),含塵氣(qi)(qi)體(ti)受(shou)到氣(qi)(qi)流(liu)分(fen)布板以及折流(liu)板的(de)(de)(de)(de)調整后,使(shi)氣(qi)(qi)流(liu)能較(jiao)均勻(yun)地進人電(dian)(dian)場(chang)(chang)。在(zai)(zai)橫(heng)斷面擴(kuo)大(da)的(de)(de)(de)(de)作(zuo)用(yong)下,氣(qi)(qi)流(liu)速度迅速降(jiang)(jiang)低(di),其中有些較(jiao)重的(de)(de)(de)(de)塵粒(li)便(bian)失(shi)去速度而(er)沉(chen)(chen)降(jiang)(jiang)下來(lai)。進人電(dian)(dian)場(chang)(chang)的(de)(de)(de)(de)含塵氣(qi)(qi)體(ti)由(you)于電(dian)(dian)暈(yun)(yun)極(ji)(ji)(ji)通人高壓直流(liu)電(dian)(dian),則在(zai)(zai)電(dian)(dian)暈(yun)(yun)極(ji)(ji)(ji)附近產生(sheng)電(dian)(dian)暈(yun)(yun)現象,使(shi)氣(qi)(qi)體(ti)電(dian)(dian)離,電(dian)(dian)離后的(de)(de)(de)(de)氣(qi)(qi)體(ti)中存在(zai)(zai)大(da)量(liang)的(de)(de)(de)(de)電(dian)(dian)子(zi)和離子(zi),這(zhe)些電(dian)(dian)子(zi)和離子(zi)與(yu)進人電(dian)(dian)場(chang)(chang)的(de)(de)(de)(de)粉塵結合起(qi)來(lai),使(shi)塵粒(li)帶(dai)電(dian)(dian),帶(dai)電(dian)(dian)塵粒(li)在(zai)(zai)電(dian)(dian)場(chang)(chang)力的(de)(de)(de)(de)作(zuo)用(yong)下趨向本設(she)備陽(yang)極(ji)(ji)(ji)(正極(ji)(ji)(ji)、本設(she)備采用(yong)負(fu)高壓制(zhi))和陰極(ji)(ji)(ji)(負(fu)極(ji)(ji)(ji)) , 釋放(fang)出電(dian)(dian)子(zi)分(fen)別沉(chen)(chen)積在(zai)(zai)相應的(de)(de)(de)(de)電(dian)(dian)極(ji)(ji)(ji)上(shang),通過(guo)設(she)備陰陽(yang)極(ji)(ji)(ji)振打系統的(de)(de)(de)(de)振打,使(shi)沉(chen)(chen)積在(zai)(zai)陰陽(yang)電(dian)(dian)極(ji)(ji)(ji)上(shang)的(de)(de)(de)(de)粉塵振落,進人集灰斗 通過(guo)排灰裝置放(fang)出,回(hui)收有物料,被)凈(jing)化(hua)(hua)的(de)(de)(de)(de)氣(qi)(qi)體(ti)排入(ru)大(da)氣(qi)(qi)。
工作原理(li)
靜電(dian)(dian)(dian)除塵(chen)器的(de)(de)(de)工作原(yuan)理(li)是(shi)利用高壓電(dian)(dian)(dian)場使煙氣發生(sheng)電(dian)(dian)(dian)離,氣流中的(de)(de)(de)粉(fen)塵(chen)荷(he)電(dian)(dian)(dian)在電(dian)(dian)(dian)場作用下(xia)與氣流分(fen)離。負極(ji)由不(bu)(bu)同(tong)斷面形(xing)(xing)狀(zhuang)的(de)(de)(de)金屬導線制成(cheng),叫放(fang)電(dian)(dian)(dian)電(dian)(dian)(dian)極(ji)。正極(ji)由不(bu)(bu)同(tong)幾何(he)形(xing)(xing)狀(zhuang)的(de)(de)(de)金屬板制成(cheng),叫集(ji)塵(chen)電(dian)(dian)(dian)極(ji)。靜電(dian)(dian)(dian)除塵(chen)器的(de)(de)(de)性(xing)(xing)能受粉(fen)塵(chen)性(xing)(xing)質(zhi)、設備構造和(he)煙氣流速等三個因素(su)的(de)(de)(de)影響(xiang)。粉(fen)塵(chen)的(de)(de)(de)比(bi)(bi)電(dian)(dian)(dian)阻(zu)是(shi)評價(jia)導電(dian)(dian)(dian)性(xing)(xing)的(de)(de)(de)指(zhi)標(biao),它(ta)對除塵(chen)效(xiao)(xiao)率有直接的(de)(de)(de)影響(xiang)。比(bi)(bi)電(dian)(dian)(dian)阻(zu)過低,塵(chen)粒(li)難以保持在集(ji)塵(chen)電(dian)(dian)(dian)極(ji)上,致使其重(zhong)返氣流。比(bi)(bi)電(dian)(dian)(dian)阻(zu)過高,到達集(ji)塵(chen)電(dian)(dian)(dian)極(ji)的(de)(de)(de)塵(chen)粒(li)電(dian)(dian)(dian)荷(he)不(bu)(bu)易放(fang)出(chu),在塵(chen)層之間形(xing)(xing)成(cheng)電(dian)(dian)(dian)壓梯度會產生(sheng)局(ju)部擊穿和(he)放(fang)電(dian)(dian)(dian)現象。這些情況都會造成(cheng)除塵(chen)效(xiao)(xiao)率下(xia)降。
電除塵器(qi)的(de)(de)(de)基本原理是(shi)利用電力捕集煙(yan)氣中的(de)(de)(de)粉(fen)塵,主要包括以下四個相互(hu)有關的(de)(de)(de)物理過程: (1) 氣體的(de)(de)(de)電離。(2) 粉(fen)塵的(de)(de)(de)荷(he)電。(3) 荷(he)電粉(fen)塵向電極(ji)移動。(4) 荷(he)電粉(fen)塵的(de)(de)(de)捕集。