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(chu)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)器是以(yi)靜電(dian)(dian)凈(jing)(jing)化(hua)法來(lai)(lai)收(shou)(shou)捕廢(fei)氣(qi)(qi)(qi)(qi)中的(de)粉塵(chen)(chen)(chen)(chen)(chen)(chen)(chen),它的(de)凈(jing)(jing)化(hua)工作(zuo)(zuo)上要是依靠電(dian)(dian)暈(yun)(yun)極(ji)(ji)和沉淀兩(liang)個系統(tong)來(lai)(lai)完成的(de),當含(han)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)氣(qi)(qi)(qi)(qi)體(ti)進人(ren)(ren)氣(qi)(qi)(qi)(qi)刺叭(ba)時(shi),含(han)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)氣(qi)(qi)(qi)(qi)體(ti)受到(dao)氣(qi)(qi)(qi)(qi)流(liu)分布(bu)板以(yi)及折流(liu)板的(de)調整后(hou),使氣(qi)(qi)(qi)(qi)流(liu)能較均勻地進人(ren)(ren)電(dian)(dian)場(chang)(chang)。在(zai)(zai)(zai)橫斷面擴(kuo)大(da)的(de)作(zuo)(zuo)用(yong)下,氣(qi)(qi)(qi)(qi)流(liu)速度迅速降低,其中有(you)些(xie)較重的(de)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)粒便失去速度而沉降下來(lai)(lai)。進人(ren)(ren)電(dian)(dian)場(chang)(chang)的(de)含(han)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)氣(qi)(qi)(qi)(qi)體(ti)由于電(dian)(dian)暈(yun)(yun)極(ji)(ji)通(tong)人(ren)(ren)高(gao)(gao)壓(ya)直流(liu)電(dian)(dian),則在(zai)(zai)(zai)電(dian)(dian)暈(yun)(yun)極(ji)(ji)附(fu)近產生電(dian)(dian)暈(yun)(yun)現象,使氣(qi)(qi)(qi)(qi)體(ti)電(dian)(dian)離(li)(li),電(dian)(dian)離(li)(li)后(hou)的(de)氣(qi)(qi)(qi)(qi)體(ti)中存(cun)在(zai)(zai)(zai)大(da)量的(de)電(dian)(dian)子和離(li)(li)子,這些(xie)電(dian)(dian)子和離(li)(li)子與進人(ren)(ren)電(dian)(dian)場(chang)(chang)的(de)粉塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)結合起來(lai)(lai),使塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)粒帶電(dian)(dian),帶電(dian)(dian)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)粒在(zai)(zai)(zai)電(dian)(dian)場(chang)(chang)力(li)的(de)作(zuo)(zuo)用(yong)下趨(qu)向本(ben)設(she)備陽極(ji)(ji)(正極(ji)(ji)、本(ben)設(she)備采用(yong)負高(gao)(gao)壓(ya)制)和陰極(ji)(ji)(負極(ji)(ji)) , 釋(shi)放出電(dian)(dian)子分別沉積(ji)在(zai)(zai)(zai)相應(ying)的(de)電(dian)(dian)極(ji)(ji)上,通(tong)過設(she)備陰陽極(ji)(ji)振打系統(tong)的(de)振打,使沉積(ji)在(zai)(zai)(zai)陰陽電(dian)(dian)極(ji)(ji)上的(de)粉塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)振落,進人(ren)(ren)集灰斗 通(tong)過排灰裝(zhuang)置(zhi)放出,回收(shou)(shou)有(you)物料,被(bei))凈(jing)(jing)化(hua)的(de)氣(qi)(qi)(qi)(qi)體(ti)排入(ru)大(da)氣(qi)(qi)(qi)(qi)。
工(gong)作(zuo)原(yuan)理
靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)器(qi)的(de)(de)工作原理是(shi)利用高壓電(dian)(dian)(dian)(dian)(dian)(dian)場(chang)使煙氣發(fa)生電(dian)(dian)(dian)(dian)(dian)(dian)離,氣流(liu)(liu)中(zhong)的(de)(de)粉(fen)塵(chen)(chen)(chen)荷(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)場(chang)作用下(xia)與氣流(liu)(liu)分離。負極由不(bu)同(tong)斷面(mian)形(xing)狀的(de)(de)金(jin)屬導(dao)線制(zhi)(zhi)成,叫放電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)極。正極由不(bu)同(tong)幾何(he)形(xing)狀的(de)(de)金(jin)屬板制(zhi)(zhi)成,叫集(ji)(ji)塵(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)極。靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)器(qi)的(de)(de)性能受粉(fen)塵(chen)(chen)(chen)性質、設(she)備構造(zao)和煙氣流(liu)(liu)速等三(san)個因素的(de)(de)影(ying)響。粉(fen)塵(chen)(chen)(chen)的(de)(de)比電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)是(shi)評價導(dao)電(dian)(dian)(dian)(dian)(dian)(dian)性的(de)(de)指標,它(ta)對除塵(chen)(chen)(chen)效率有直(zhi)接的(de)(de)影(ying)響。比電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)過(guo)低,塵(chen)(chen)(chen)粒難以(yi)保持(chi)在(zai)集(ji)(ji)塵(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)極上,致(zhi)使其重返氣流(liu)(liu)。比電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)過(guo)高,到達集(ji)(ji)塵(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)極的(de)(de)塵(chen)(chen)(chen)粒電(dian)(dian)(dian)(dian)(dian)(dian)荷(he)(he)不(bu)易放出(chu),在(zai)塵(chen)(chen)(chen)層之(zhi)間形(xing)成電(dian)(dian)(dian)(dian)(dian)(dian)壓梯(ti)度會(hui)產(chan)生局部擊穿(chuan)和放電(dian)(dian)(dian)(dian)(dian)(dian)現(xian)象。這些(xie)情況都會(hui)造(zao)成除塵(chen)(chen)(chen)效率下(xia)降。
電(dian)(dian)除塵器(qi)的(de)基本原理(li)是利用電(dian)(dian)力捕集煙氣中的(de)粉塵,主要包括以下四個相互(hu)有關的(de)物理(li)過程(cheng): (1) 氣體的(de)電(dian)(dian)離。(2) 粉塵的(de)荷(he)電(dian)(dian)。(3) 荷(he)電(dian)(dian)粉塵向電(dian)(dian)極(ji)移(yi)動。(4) 荷(he)電(dian)(dian)粉塵的(de)捕集。