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)除塵(chen)器是以(yi)靜電(dian)(dian)(dian)(dian)(dian)凈(jing)化法(fa)來(lai)(lai)收(shou)捕廢氣(qi)(qi)(qi)中的(de)(de)(de)粉塵(chen),它的(de)(de)(de)凈(jing)化工作(zuo)上要是依靠電(dian)(dian)(dian)(dian)(dian)暈(yun)(yun)極(ji)(ji)和沉淀(dian)兩個系統來(lai)(lai)完成的(de)(de)(de),當含塵(chen)氣(qi)(qi)(qi)體(ti)進(jin)人(ren)(ren)(ren)氣(qi)(qi)(qi)刺叭時(shi),含塵(chen)氣(qi)(qi)(qi)體(ti)受(shou)到(dao)氣(qi)(qi)(qi)流(liu)分布板以(yi)及折流(liu)板的(de)(de)(de)調整(zheng)后,使(shi)氣(qi)(qi)(qi)流(liu)能較均勻地進(jin)人(ren)(ren)(ren)電(dian)(dian)(dian)(dian)(dian)場。在橫斷面擴大的(de)(de)(de)作(zuo)用(yong)(yong)下(xia),氣(qi)(qi)(qi)流(liu)速(su)度迅速(su)降(jiang)(jiang)低,其(qi)中有些較重的(de)(de)(de)塵(chen)粒便失去速(su)度而沉降(jiang)(jiang)下(xia)來(lai)(lai)。進(jin)人(ren)(ren)(ren)電(dian)(dian)(dian)(dian)(dian)場的(de)(de)(de)含塵(chen)氣(qi)(qi)(qi)體(ti)由于電(dian)(dian)(dian)(dian)(dian)暈(yun)(yun)極(ji)(ji)通人(ren)(ren)(ren)高壓直流(liu)電(dian)(dian)(dian)(dian)(dian),則在電(dian)(dian)(dian)(dian)(dian)暈(yun)(yun)極(ji)(ji)附近產生電(dian)(dian)(dian)(dian)(dian)暈(yun)(yun)現象,使(shi)氣(qi)(qi)(qi)體(ti)電(dian)(dian)(dian)(dian)(dian)離,電(dian)(dian)(dian)(dian)(dian)離后的(de)(de)(de)氣(qi)(qi)(qi)體(ti)中存在大量的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)子(zi)和離子(zi),這些電(dian)(dian)(dian)(dian)(dian)子(zi)和離子(zi)與進(jin)人(ren)(ren)(ren)電(dian)(dian)(dian)(dian)(dian)場的(de)(de)(de)粉塵(chen)結合起來(lai)(lai),使(shi)塵(chen)粒帶(dai)電(dian)(dian)(dian)(dian)(dian),帶(dai)電(dian)(dian)(dian)(dian)(dian)塵(chen)粒在電(dian)(dian)(dian)(dian)(dian)場力的(de)(de)(de)作(zuo)用(yong)(yong)下(xia)趨向本設備(bei)陽極(ji)(ji)(正極(ji)(ji)、本設備(bei)采用(yong)(yong)負高壓制(zhi))和陰極(ji)(ji)(負極(ji)(ji)) , 釋(shi)放(fang)出(chu)電(dian)(dian)(dian)(dian)(dian)子(zi)分別沉積(ji)在相應的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)上,通過(guo)設備(bei)陰陽極(ji)(ji)振打系統的(de)(de)(de)振打,使(shi)沉積(ji)在陰陽電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)上的(de)(de)(de)粉塵(chen)振落(luo),進(jin)人(ren)(ren)(ren)集灰(hui)斗 通過(guo)排灰(hui)裝置放(fang)出(chu),回收(shou)有物料,被)凈(jing)化的(de)(de)(de)氣(qi)(qi)(qi)體(ti)排入(ru)大氣(qi)(qi)(qi)。
工作(zuo)原理(li)
靜電(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)器(qi)的(de)(de)(de)工作原理是(shi)(shi)利(li)用(yong)高壓(ya)電(dian)(dian)(dian)(dian)場使(shi)(shi)煙(yan)氣(qi)發生電(dian)(dian)(dian)(dian)離,氣(qi)流(liu)(liu)中(zhong)的(de)(de)(de)粉(fen)塵(chen)(chen)(chen)荷(he)電(dian)(dian)(dian)(dian)在電(dian)(dian)(dian)(dian)場作用(yong)下與氣(qi)流(liu)(liu)分離。負(fu)極由(you)不(bu)同斷面形狀的(de)(de)(de)金(jin)屬導線制成,叫放(fang)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)極。正極由(you)不(bu)同幾何形狀的(de)(de)(de)金(jin)屬板制成,叫集塵(chen)(chen)(chen)電(dian)(dian)(dian)(dian)極。靜電(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)器(qi)的(de)(de)(de)性(xing)能(neng)受粉(fen)塵(chen)(chen)(chen)性(xing)質、設備構造(zao)和(he)煙(yan)氣(qi)流(liu)(liu)速等三個因(yin)素的(de)(de)(de)影響(xiang)。粉(fen)塵(chen)(chen)(chen)的(de)(de)(de)比電(dian)(dian)(dian)(dian)阻(zu)是(shi)(shi)評價(jia)導電(dian)(dian)(dian)(dian)性(xing)的(de)(de)(de)指標(biao),它對除塵(chen)(chen)(chen)效率有直(zhi)接的(de)(de)(de)影響(xiang)。比電(dian)(dian)(dian)(dian)阻(zu)過低(di),塵(chen)(chen)(chen)粒難以保持在集塵(chen)(chen)(chen)電(dian)(dian)(dian)(dian)極上,致使(shi)(shi)其重返氣(qi)流(liu)(liu)。比電(dian)(dian)(dian)(dian)阻(zu)過高,到達集塵(chen)(chen)(chen)電(dian)(dian)(dian)(dian)極的(de)(de)(de)塵(chen)(chen)(chen)粒電(dian)(dian)(dian)(dian)荷(he)不(bu)易放(fang)出,在塵(chen)(chen)(chen)層之間形成電(dian)(dian)(dian)(dian)壓(ya)梯度會產生局部擊穿和(he)放(fang)電(dian)(dian)(dian)(dian)現象。這些情況都會造(zao)成除塵(chen)(chen)(chen)效率下降。
電(dian)除塵器的(de)(de)基本原理是利用電(dian)力捕(bu)集煙氣中(zhong)的(de)(de)粉(fen)塵,主要包括以下四個相互有關的(de)(de)物理過程: (1) 氣體的(de)(de)電(dian)離。(2) 粉(fen)塵的(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)捕(bu)集。