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(shi)靜電(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)器是(shi)以(yi)靜電(dian)(dian)(dian)(dian)(dian)(dian)凈化法來(lai)收捕廢氣(qi)(qi)中(zhong)的(de)(de)粉塵(chen),它的(de)(de)凈化工(gong)作上要(yao)是(shi)依(yi)靠(kao)電(dian)(dian)(dian)(dian)(dian)(dian)暈(yun)極和沉(chen)淀兩個系統(tong)來(lai)完成的(de)(de),當含(han)(han)塵(chen)氣(qi)(qi)體進(jin)(jin)人(ren)氣(qi)(qi)刺叭(ba)時(shi),含(han)(han)塵(chen)氣(qi)(qi)體受到氣(qi)(qi)流(liu)(liu)分布(bu)板以(yi)及折(zhe)流(liu)(liu)板的(de)(de)調整后(hou)(hou),使(shi)氣(qi)(qi)流(liu)(liu)能較均勻地進(jin)(jin)人(ren)電(dian)(dian)(dian)(dian)(dian)(dian)場(chang)。在(zai)橫斷面(mian)擴(kuo)大的(de)(de)作用下,氣(qi)(qi)流(liu)(liu)速度迅速降低,其中(zhong)有(you)些較重(zhong)的(de)(de)塵(chen)粒(li)便(bian)失去(qu)速度而沉(chen)降下來(lai)。進(jin)(jin)人(ren)電(dian)(dian)(dian)(dian)(dian)(dian)場(chang)的(de)(de)含(han)(han)塵(chen)氣(qi)(qi)體由于電(dian)(dian)(dian)(dian)(dian)(dian)暈(yun)極通人(ren)高壓(ya)直流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian),則在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)暈(yun)極附(fu)近產生電(dian)(dian)(dian)(dian)(dian)(dian)暈(yun)現(xian)象,使(shi)氣(qi)(qi)體電(dian)(dian)(dian)(dian)(dian)(dian)離(li),電(dian)(dian)(dian)(dian)(dian)(dian)離(li)后(hou)(hou)的(de)(de)氣(qi)(qi)體中(zhong)存在(zai)大量(liang)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)和離(li)子(zi)(zi),這些電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)和離(li)子(zi)(zi)與進(jin)(jin)人(ren)電(dian)(dian)(dian)(dian)(dian)(dian)場(chang)的(de)(de)粉塵(chen)結(jie)合起來(lai),使(shi)塵(chen)粒(li)帶電(dian)(dian)(dian)(dian)(dian)(dian),帶電(dian)(dian)(dian)(dian)(dian)(dian)塵(chen)粒(li)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)場(chang)力(li)的(de)(de)作用下趨向本設備(bei)(bei)陽極(正極、本設備(bei)(bei)采用負(fu)高壓(ya)制)和陰極(負(fu)極) , 釋放出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)(zi)分別沉(chen)積在(zai)相應的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)極上,通過設備(bei)(bei)陰陽極振(zhen)(zhen)打系統(tong)的(de)(de)振(zhen)(zhen)打,使(shi)沉(chen)積在(zai)陰陽電(dian)(dian)(dian)(dian)(dian)(dian)極上的(de)(de)粉塵(chen)振(zhen)(zhen)落,進(jin)(jin)人(ren)集灰(hui)斗 通過排灰(hui)裝(zhuang)置放出(chu),回收有(you)物(wu)料,被)凈化的(de)(de)氣(qi)(qi)體排入大氣(qi)(qi)。
工(gong)作原理
靜(jing)(jing)電(dian)(dian)(dian)(dian)除塵(chen)器(qi)的(de)(de)(de)工作原理是(shi)利用(yong)(yong)高壓(ya)電(dian)(dian)(dian)(dian)場使(shi)煙氣(qi)發(fa)生電(dian)(dian)(dian)(dian)離(li)(li),氣(qi)流中(zhong)的(de)(de)(de)粉塵(chen)荷電(dian)(dian)(dian)(dian)在電(dian)(dian)(dian)(dian)場作用(yong)(yong)下(xia)與氣(qi)流分(fen)離(li)(li)。負極由(you)不(bu)同斷面(mian)形狀(zhuang)的(de)(de)(de)金(jin)屬(shu)導(dao)線制(zhi)成,叫(jiao)(jiao)放電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)極。正極由(you)不(bu)同幾何(he)形狀(zhuang)的(de)(de)(de)金(jin)屬(shu)板制(zhi)成,叫(jiao)(jiao)集塵(chen)電(dian)(dian)(dian)(dian)極。靜(jing)(jing)電(dian)(dian)(dian)(dian)除塵(chen)器(qi)的(de)(de)(de)性(xing)能(neng)受粉塵(chen)性(xing)質、設備構造和煙氣(qi)流速等(deng)三個因素的(de)(de)(de)影響。粉塵(chen)的(de)(de)(de)比電(dian)(dian)(dian)(dian)阻(zu)是(shi)評價導(dao)電(dian)(dian)(dian)(dian)性(xing)的(de)(de)(de)指標,它(ta)對除塵(chen)效率有(you)直(zhi)接(jie)的(de)(de)(de)影響。比電(dian)(dian)(dian)(dian)阻(zu)過(guo)(guo)低,塵(chen)粒難(nan)以保(bao)持在集塵(chen)電(dian)(dian)(dian)(dian)極上,致使(shi)其重返氣(qi)流。比電(dian)(dian)(dian)(dian)阻(zu)過(guo)(guo)高,到達集塵(chen)電(dian)(dian)(dian)(dian)極的(de)(de)(de)塵(chen)粒電(dian)(dian)(dian)(dian)荷不(bu)易放出,在塵(chen)層(ceng)之間形成電(dian)(dian)(dian)(dian)壓(ya)梯度會產生局(ju)部擊(ji)穿和放電(dian)(dian)(dian)(dian)現象(xiang)。這些(xie)情況都會造成除塵(chen)效率下(xia)降。
電(dian)(dian)除塵(chen)器的(de)基本原理(li)是(shi)利用電(dian)(dian)力捕(bu)集(ji)煙氣(qi)中的(de)粉(fen)(fen)塵(chen),主要(yao)包(bao)括以下四(si)個相互有關(guan)的(de)物理(li)過程: (1) 氣(qi)體的(de)電(dian)(dian)離。(2) 粉(fen)(fen)塵(chen)的(de)荷(he)電(dian)(dian)。(3) 荷(he)電(dian)(dian)粉(fen)(fen)塵(chen)向電(dian)(dian)極移動(dong)。(4) 荷(he)電(dian)(dian)粉(fen)(fen)塵(chen)的(de)捕(bu)集(ji)。