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)(dian)除塵(chen)(chen)(chen)器是(shi)(shi)以靜(jing)電(dian)(dian)(dian)(dian)凈(jing)化(hua)法來收(shou)捕廢氣(qi)(qi)(qi)中(zhong)的(de)(de)(de)粉塵(chen)(chen)(chen),它的(de)(de)(de)凈(jing)化(hua)工(gong)作(zuo)上(shang)要是(shi)(shi)依靠電(dian)(dian)(dian)(dian)暈(yun)極(ji)(ji)和沉(chen)淀兩個系統(tong)來完成的(de)(de)(de),當(dang)含(han)塵(chen)(chen)(chen)氣(qi)(qi)(qi)體(ti)進人(ren)(ren)(ren)(ren)氣(qi)(qi)(qi)刺叭時,含(han)塵(chen)(chen)(chen)氣(qi)(qi)(qi)體(ti)受到(dao)氣(qi)(qi)(qi)流(liu)(liu)分布(bu)板(ban)以及折流(liu)(liu)板(ban)的(de)(de)(de)調整(zheng)后,使(shi)氣(qi)(qi)(qi)流(liu)(liu)能較均勻地進人(ren)(ren)(ren)(ren)電(dian)(dian)(dian)(dian)場(chang)(chang)。在(zai)(zai)(zai)(zai)橫斷面擴大的(de)(de)(de)作(zuo)用下,氣(qi)(qi)(qi)流(liu)(liu)速(su)度迅速(su)降低(di),其中(zhong)有些(xie)較重的(de)(de)(de)塵(chen)(chen)(chen)粒(li)便失去速(su)度而沉(chen)降下來。進人(ren)(ren)(ren)(ren)電(dian)(dian)(dian)(dian)場(chang)(chang)的(de)(de)(de)含(han)塵(chen)(chen)(chen)氣(qi)(qi)(qi)體(ti)由于(yu)電(dian)(dian)(dian)(dian)暈(yun)極(ji)(ji)通(tong)人(ren)(ren)(ren)(ren)高壓直流(liu)(liu)電(dian)(dian)(dian)(dian),則(ze)在(zai)(zai)(zai)(zai)電(dian)(dian)(dian)(dian)暈(yun)極(ji)(ji)附近(jin)產生電(dian)(dian)(dian)(dian)暈(yun)現(xian)象,使(shi)氣(qi)(qi)(qi)體(ti)電(dian)(dian)(dian)(dian)離,電(dian)(dian)(dian)(dian)離后的(de)(de)(de)氣(qi)(qi)(qi)體(ti)中(zhong)存在(zai)(zai)(zai)(zai)大量(liang)的(de)(de)(de)電(dian)(dian)(dian)(dian)子(zi)(zi)和離子(zi)(zi),這些(xie)電(dian)(dian)(dian)(dian)子(zi)(zi)和離子(zi)(zi)與進人(ren)(ren)(ren)(ren)電(dian)(dian)(dian)(dian)場(chang)(chang)的(de)(de)(de)粉塵(chen)(chen)(chen)結合起(qi)來,使(shi)塵(chen)(chen)(chen)粒(li)帶電(dian)(dian)(dian)(dian),帶電(dian)(dian)(dian)(dian)塵(chen)(chen)(chen)粒(li)在(zai)(zai)(zai)(zai)電(dian)(dian)(dian)(dian)場(chang)(chang)力的(de)(de)(de)作(zuo)用下趨(qu)向(xiang)本設(she)(she)備(bei)陽極(ji)(ji)(正極(ji)(ji)、本設(she)(she)備(bei)采用負高壓制)和陰極(ji)(ji)(負極(ji)(ji)) , 釋放(fang)出電(dian)(dian)(dian)(dian)子(zi)(zi)分別沉(chen)積在(zai)(zai)(zai)(zai)相(xiang)應的(de)(de)(de)電(dian)(dian)(dian)(dian)極(ji)(ji)上(shang),通(tong)過(guo)設(she)(she)備(bei)陰陽極(ji)(ji)振打系統(tong)的(de)(de)(de)振打,使(shi)沉(chen)積在(zai)(zai)(zai)(zai)陰陽電(dian)(dian)(dian)(dian)極(ji)(ji)上(shang)的(de)(de)(de)粉塵(chen)(chen)(chen)振落,進人(ren)(ren)(ren)(ren)集灰斗 通(tong)過(guo)排(pai)灰裝置放(fang)出,回收(shou)有物(wu)料,被)凈(jing)化(hua)的(de)(de)(de)氣(qi)(qi)(qi)體(ti)排(pai)入大氣(qi)(qi)(qi)。
工作原理(li)
靜電(dian)(dian)除塵(chen)(chen)(chen)(chen)器的工作(zuo)(zuo)原(yuan)理(li)是(shi)利用(yong)(yong)高壓電(dian)(dian)場(chang)使煙(yan)(yan)氣發生(sheng)電(dian)(dian)離,氣流(liu)中的粉(fen)塵(chen)(chen)(chen)(chen)荷電(dian)(dian)在(zai)電(dian)(dian)場(chang)作(zuo)(zuo)用(yong)(yong)下與氣流(liu)分離。負極由不(bu)(bu)同(tong)斷面形(xing)狀的金屬導(dao)線(xian)制成,叫放電(dian)(dian)電(dian)(dian)極。正極由不(bu)(bu)同(tong)幾何(he)形(xing)狀的金屬板制成,叫集(ji)塵(chen)(chen)(chen)(chen)電(dian)(dian)極。靜電(dian)(dian)除塵(chen)(chen)(chen)(chen)器的性(xing)(xing)能受粉(fen)塵(chen)(chen)(chen)(chen)性(xing)(xing)質、設備構造和(he)煙(yan)(yan)氣流(liu)速等三個因素的影響。粉(fen)塵(chen)(chen)(chen)(chen)的比電(dian)(dian)阻(zu)是(shi)評價導(dao)電(dian)(dian)性(xing)(xing)的指(zhi)標,它對除塵(chen)(chen)(chen)(chen)效(xiao)率有直接的影響。比電(dian)(dian)阻(zu)過低,塵(chen)(chen)(chen)(chen)粒難以保持在(zai)集(ji)塵(chen)(chen)(chen)(chen)電(dian)(dian)極上,致使其重(zhong)返氣流(liu)。比電(dian)(dian)阻(zu)過高,到達集(ji)塵(chen)(chen)(chen)(chen)電(dian)(dian)極的塵(chen)(chen)(chen)(chen)粒電(dian)(dian)荷不(bu)(bu)易(yi)放出(chu),在(zai)塵(chen)(chen)(chen)(chen)層之間形(xing)成電(dian)(dian)壓梯度會(hui)產生(sheng)局部擊穿和(he)放電(dian)(dian)現(xian)象(xiang)。這(zhe)些(xie)情況(kuang)都會(hui)造成除塵(chen)(chen)(chen)(chen)效(xiao)率下降(jiang)。
電(dian)(dian)(dian)(dian)(dian)除塵器的(de)基(ji)本原理是利(li)用電(dian)(dian)(dian)(dian)(dian)力捕(bu)集(ji)煙氣(qi)中(zhong)的(de)粉(fen)塵,主要包(bao)括以下四個相(xiang)互有關的(de)物理過程: (1) 氣(qi)體(ti)的(de)電(dian)(dian)(dian)(dian)(dian)離。(2) 粉(fen)塵的(de)荷電(dian)(dian)(dian)(dian)(dian)。(3) 荷電(dian)(dian)(dian)(dian)(dian)粉(fen)塵向電(dian)(dian)(dian)(dian)(dian)極移動。(4) 荷電(dian)(dian)(dian)(dian)(dian)粉(fen)塵的(de)捕(bu)集(ji)。