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(qi)是以(yi)靜電(dian)(dian)凈(jing)化法來(lai)收(shou)捕廢氣中的(de)(de)粉塵,它的(de)(de)凈(jing)化工作(zuo)上要是依靠電(dian)(dian)暈(yun)極(ji)(ji)(ji)(ji)(ji)和沉(chen)淀兩個系統來(lai)完成的(de)(de),當含(han)塵氣體(ti)(ti)進(jin)人氣刺叭時,含(han)塵氣體(ti)(ti)受到氣流(liu)(liu)分布板以(yi)及折(zhe)流(liu)(liu)板的(de)(de)調(diao)整后,使氣流(liu)(liu)能較均勻地進(jin)人電(dian)(dian)場。在橫(heng)斷面擴大的(de)(de)作(zuo)用(yong)下(xia),氣流(liu)(liu)速(su)度迅速(su)降低,其中有些較重的(de)(de)塵粒便(bian)失去速(su)度而沉(chen)降下(xia)來(lai)。進(jin)人電(dian)(dian)場的(de)(de)含(han)塵氣體(ti)(ti)由(you)于電(dian)(dian)暈(yun)極(ji)(ji)(ji)(ji)(ji)通(tong)人高壓(ya)直(zhi)流(liu)(liu)電(dian)(dian),則(ze)在電(dian)(dian)暈(yun)極(ji)(ji)(ji)(ji)(ji)附近(jin)產生電(dian)(dian)暈(yun)現象,使氣體(ti)(ti)電(dian)(dian)離(li),電(dian)(dian)離(li)后的(de)(de)氣體(ti)(ti)中存(cun)在大量的(de)(de)電(dian)(dian)子(zi)和離(li)子(zi),這些電(dian)(dian)子(zi)和離(li)子(zi)與進(jin)人電(dian)(dian)場的(de)(de)粉塵結(jie)合起來(lai),使塵粒帶(dai)電(dian)(dian),帶(dai)電(dian)(dian)塵粒在電(dian)(dian)場力的(de)(de)作(zuo)用(yong)下(xia)趨向(xiang)本設(she)(she)備陽極(ji)(ji)(ji)(ji)(ji)(正極(ji)(ji)(ji)(ji)(ji)、本設(she)(she)備采用(yong)負高壓(ya)制)和陰(yin)(yin)極(ji)(ji)(ji)(ji)(ji)(負極(ji)(ji)(ji)(ji)(ji)) , 釋放出(chu)電(dian)(dian)子(zi)分別(bie)沉(chen)積在相應的(de)(de)電(dian)(dian)極(ji)(ji)(ji)(ji)(ji)上,通(tong)過設(she)(she)備陰(yin)(yin)陽極(ji)(ji)(ji)(ji)(ji)振打系統的(de)(de)振打,使沉(chen)積在陰(yin)(yin)陽電(dian)(dian)極(ji)(ji)(ji)(ji)(ji)上的(de)(de)粉塵振落,進(jin)人集灰斗 通(tong)過排灰裝置放出(chu),回收(shou)有物料,被(bei))凈(jing)化的(de)(de)氣體(ti)(ti)排入(ru)大氣。
工作原理(li)
靜電(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)器的(de)(de)(de)工作(zuo)原(yuan)理(li)是(shi)利用高壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)場(chang)使煙氣(qi)發生電(dian)(dian)(dian)(dian)(dian)(dian)離(li),氣(qi)流(liu)中的(de)(de)(de)粉塵(chen)(chen)(chen)荷電(dian)(dian)(dian)(dian)(dian)(dian)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)場(chang)作(zuo)用下(xia)與(yu)氣(qi)流(liu)分(fen)離(li)。負極由不同斷面形(xing)(xing)狀的(de)(de)(de)金(jin)屬導(dao)線制(zhi)成(cheng),叫放電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)極。正(zheng)極由不同幾(ji)何形(xing)(xing)狀的(de)(de)(de)金(jin)屬板制(zhi)成(cheng),叫集塵(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)極。靜電(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)器的(de)(de)(de)性能受粉塵(chen)(chen)(chen)性質(zhi)、設(she)備(bei)構造(zao)和煙氣(qi)流(liu)速等三個因素(su)的(de)(de)(de)影(ying)響。粉塵(chen)(chen)(chen)的(de)(de)(de)比電(dian)(dian)(dian)(dian)(dian)(dian)阻是(shi)評價導(dao)電(dian)(dian)(dian)(dian)(dian)(dian)性的(de)(de)(de)指標,它對除塵(chen)(chen)(chen)效(xiao)率有直接的(de)(de)(de)影(ying)響。比電(dian)(dian)(dian)(dian)(dian)(dian)阻過(guo)低,塵(chen)(chen)(chen)粒難以保(bao)持在(zai)集塵(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)極上(shang),致使其重(zhong)返氣(qi)流(liu)。比電(dian)(dian)(dian)(dian)(dian)(dian)阻過(guo)高,到(dao)達集塵(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)極的(de)(de)(de)塵(chen)(chen)(chen)粒電(dian)(dian)(dian)(dian)(dian)(dian)荷不易放出,在(zai)塵(chen)(chen)(chen)層之間形(xing)(xing)成(cheng)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)梯度(du)會(hui)(hui)產生局部擊穿(chuan)和放電(dian)(dian)(dian)(dian)(dian)(dian)現(xian)象。這些情況都會(hui)(hui)造(zao)成(cheng)除塵(chen)(chen)(chen)效(xiao)率下(xia)降。
電(dian)(dian)除(chu)塵器的(de)(de)(de)基本原理是利(li)用電(dian)(dian)力捕集(ji)煙(yan)氣(qi)中(zhong)的(de)(de)(de)粉塵,主(zhu)要包(bao)括以下四(si)個相(xiang)互有(you)關的(de)(de)(de)物(wu)理過程(cheng): (1) 氣(qi)體的(de)(de)(de)電(dian)(dian)離。(2) 粉塵的(de)(de)(de)荷電(dian)(dian)。(3) 荷電(dian)(dian)粉塵向電(dian)(dian)極移動。(4) 荷電(dian)(dian)粉塵的(de)(de)(de)捕集(ji)。