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)除塵器是以(yi)靜(jing)電(dian)(dian)凈(jing)化法(fa)來(lai)收捕廢氣(qi)(qi)(qi)中(zhong)的(de)(de)(de)(de)粉塵,它的(de)(de)(de)(de)凈(jing)化工(gong)作(zuo)上要是依(yi)靠(kao)電(dian)(dian)暈(yun)極(ji)(ji)(ji)和(he)沉(chen)(chen)淀兩(liang)個系(xi)(xi)統來(lai)完成的(de)(de)(de)(de),當含塵氣(qi)(qi)(qi)體進(jin)人氣(qi)(qi)(qi)刺叭時,含塵氣(qi)(qi)(qi)體受(shou)到氣(qi)(qi)(qi)流(liu)分布板以(yi)及折流(liu)板的(de)(de)(de)(de)調整后,使(shi)(shi)氣(qi)(qi)(qi)流(liu)能較均勻(yun)地進(jin)人電(dian)(dian)場。在橫斷面擴(kuo)大的(de)(de)(de)(de)作(zuo)用(yong)下(xia),氣(qi)(qi)(qi)流(liu)速(su)度迅(xun)速(su)降低,其(qi)中(zhong)有些較重的(de)(de)(de)(de)塵粒便失(shi)去速(su)度而沉(chen)(chen)降下(xia)來(lai)。進(jin)人電(dian)(dian)場的(de)(de)(de)(de)含塵氣(qi)(qi)(qi)體由于電(dian)(dian)暈(yun)極(ji)(ji)(ji)通人高壓直(zhi)流(liu)電(dian)(dian),則在電(dian)(dian)暈(yun)極(ji)(ji)(ji)附(fu)近(jin)產生電(dian)(dian)暈(yun)現象(xiang),使(shi)(shi)氣(qi)(qi)(qi)體電(dian)(dian)離(li)(li),電(dian)(dian)離(li)(li)后的(de)(de)(de)(de)氣(qi)(qi)(qi)體中(zhong)存在大量的(de)(de)(de)(de)電(dian)(dian)子(zi)(zi)和(he)離(li)(li)子(zi)(zi),這些電(dian)(dian)子(zi)(zi)和(he)離(li)(li)子(zi)(zi)與進(jin)人電(dian)(dian)場的(de)(de)(de)(de)粉塵結合(he)起(qi)來(lai),使(shi)(shi)塵粒帶(dai)電(dian)(dian),帶(dai)電(dian)(dian)塵粒在電(dian)(dian)場力的(de)(de)(de)(de)作(zuo)用(yong)下(xia)趨向本(ben)設備陽(yang)極(ji)(ji)(ji)(正(zheng)極(ji)(ji)(ji)、本(ben)設備采用(yong)負高壓制(zhi))和(he)陰(yin)(yin)極(ji)(ji)(ji)(負極(ji)(ji)(ji)) , 釋放出(chu)電(dian)(dian)子(zi)(zi)分別沉(chen)(chen)積在相應的(de)(de)(de)(de)電(dian)(dian)極(ji)(ji)(ji)上,通過(guo)設備陰(yin)(yin)陽(yang)極(ji)(ji)(ji)振打系(xi)(xi)統的(de)(de)(de)(de)振打,使(shi)(shi)沉(chen)(chen)積在陰(yin)(yin)陽(yang)電(dian)(dian)極(ji)(ji)(ji)上的(de)(de)(de)(de)粉塵振落(luo),進(jin)人集灰斗 通過(guo)排(pai)(pai)灰裝置放出(chu),回收有物料,被)凈(jing)化的(de)(de)(de)(de)氣(qi)(qi)(qi)體排(pai)(pai)入大氣(qi)(qi)(qi)。
工作(zuo)原(yuan)理
靜電(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)器的(de)(de)工作(zuo)原(yuan)理是(shi)利用高(gao)壓電(dian)(dian)(dian)(dian)(dian)場(chang)使煙(yan)(yan)氣發生電(dian)(dian)(dian)(dian)(dian)離(li),氣流(liu)中的(de)(de)粉(fen)塵(chen)(chen)荷(he)電(dian)(dian)(dian)(dian)(dian)在電(dian)(dian)(dian)(dian)(dian)場(chang)作(zuo)用下與氣流(liu)分離(li)。負(fu)極(ji)由(you)不同斷面形狀的(de)(de)金屬(shu)導線(xian)制(zhi)(zhi)成(cheng)(cheng),叫放(fang)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)極(ji)。正極(ji)由(you)不同幾何形狀的(de)(de)金屬(shu)板制(zhi)(zhi)成(cheng)(cheng),叫集(ji)塵(chen)(chen)電(dian)(dian)(dian)(dian)(dian)極(ji)。靜電(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)器的(de)(de)性能受粉(fen)塵(chen)(chen)性質、設(she)備(bei)構造(zao)和(he)煙(yan)(yan)氣流(liu)速等三個(ge)因素的(de)(de)影(ying)響。粉(fen)塵(chen)(chen)的(de)(de)比電(dian)(dian)(dian)(dian)(dian)阻(zu)是(shi)評(ping)價導電(dian)(dian)(dian)(dian)(dian)性的(de)(de)指標,它對除塵(chen)(chen)效率有直接(jie)的(de)(de)影(ying)響。比電(dian)(dian)(dian)(dian)(dian)阻(zu)過(guo)低,塵(chen)(chen)粒(li)難以(yi)保(bao)持(chi)在集(ji)塵(chen)(chen)電(dian)(dian)(dian)(dian)(dian)極(ji)上,致(zhi)使其重(zhong)返(fan)氣流(liu)。比電(dian)(dian)(dian)(dian)(dian)阻(zu)過(guo)高(gao),到達集(ji)塵(chen)(chen)電(dian)(dian)(dian)(dian)(dian)極(ji)的(de)(de)塵(chen)(chen)粒(li)電(dian)(dian)(dian)(dian)(dian)荷(he)不易放(fang)出,在塵(chen)(chen)層(ceng)之間形成(cheng)(cheng)電(dian)(dian)(dian)(dian)(dian)壓梯度會產生局部擊穿(chuan)和(he)放(fang)電(dian)(dian)(dian)(dian)(dian)現(xian)象。這些情(qing)況都會造(zao)成(cheng)(cheng)除塵(chen)(chen)效率下降。
電除塵(chen)器的(de)(de)基本原理是(shi)利用電力捕(bu)集(ji)煙氣中的(de)(de)粉(fen)(fen)塵(chen),主要包括以下四(si)個相互有(you)關(guan)的(de)(de)物理過程: (1) 氣體(ti)的(de)(de)電離。(2) 粉(fen)(fen)塵(chen)的(de)(de)荷電。(3) 荷電粉(fen)(fen)塵(chen)向電極(ji)移動。(4) 荷電粉(fen)(fen)塵(chen)的(de)(de)捕(bu)集(ji)。