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(chen)(chen)器(qi)是以(yi)(yi)靜(jing)電(dian)(dian)凈化(hua)法來(lai)收(shou)捕廢氣(qi)中的(de)粉塵(chen)(chen),它的(de)凈化(hua)工作上要是依靠電(dian)(dian)暈極(ji)(ji)和沉淀兩個(ge)系統(tong)來(lai)完成的(de),當含(han)(han)塵(chen)(chen)氣(qi)體(ti)(ti)進人氣(qi)刺叭時(shi),含(han)(han)塵(chen)(chen)氣(qi)體(ti)(ti)受到氣(qi)流分(fen)布板(ban)以(yi)(yi)及(ji)折流板(ban)的(de)調整后(hou),使氣(qi)流能較均勻地進人電(dian)(dian)場(chang)。在(zai)橫(heng)斷面擴大的(de)作用下(xia),氣(qi)流速度迅(xun)速降(jiang)低(di),其(qi)中有(you)些(xie)(xie)較重的(de)塵(chen)(chen)粒(li)便(bian)失去(qu)速度而沉降(jiang)下(xia)來(lai)。進人電(dian)(dian)場(chang)的(de)含(han)(han)塵(chen)(chen)氣(qi)體(ti)(ti)由于電(dian)(dian)暈極(ji)(ji)通人高(gao)壓直(zhi)流電(dian)(dian),則在(zai)電(dian)(dian)暈極(ji)(ji)附近產生電(dian)(dian)暈現象,使氣(qi)體(ti)(ti)電(dian)(dian)離,電(dian)(dian)離后(hou)的(de)氣(qi)體(ti)(ti)中存在(zai)大量的(de)電(dian)(dian)子和離子,這些(xie)(xie)電(dian)(dian)子和離子與進人電(dian)(dian)場(chang)的(de)粉塵(chen)(chen)結(jie)合起來(lai),使塵(chen)(chen)粒(li)帶(dai)電(dian)(dian),帶(dai)電(dian)(dian)塵(chen)(chen)粒(li)在(zai)電(dian)(dian)場(chang)力(li)的(de)作用下(xia)趨向本(ben)設(she)備陽極(ji)(ji)(正極(ji)(ji)、本(ben)設(she)備采用負高(gao)壓制)和陰極(ji)(ji)(負極(ji)(ji)) , 釋放(fang)出電(dian)(dian)子分(fen)別(bie)沉積在(zai)相應(ying)的(de)電(dian)(dian)極(ji)(ji)上,通過設(she)備陰陽極(ji)(ji)振(zhen)打系統(tong)的(de)振(zhen)打,使沉積在(zai)陰陽電(dian)(dian)極(ji)(ji)上的(de)粉塵(chen)(chen)振(zhen)落,進人集(ji)灰斗(dou) 通過排(pai)灰裝置放(fang)出,回(hui)收(shou)有(you)物料,被)凈化(hua)的(de)氣(qi)體(ti)(ti)排(pai)入大氣(qi)。
工作原理
靜電(dian)(dian)(dian)除塵器的(de)(de)(de)(de)工(gong)作(zuo)原理是(shi)利用高(gao)壓電(dian)(dian)(dian)場使煙氣(qi)發生(sheng)電(dian)(dian)(dian)離,氣(qi)流(liu)中(zhong)的(de)(de)(de)(de)粉(fen)塵荷電(dian)(dian)(dian)在電(dian)(dian)(dian)場作(zuo)用下(xia)與氣(qi)流(liu)分離。負極由(you)不同斷面(mian)形狀的(de)(de)(de)(de)金(jin)屬(shu)導(dao)線制成(cheng),叫放電(dian)(dian)(dian)電(dian)(dian)(dian)極。正極由(you)不同幾何形狀的(de)(de)(de)(de)金(jin)屬(shu)板制成(cheng),叫集塵電(dian)(dian)(dian)極。靜電(dian)(dian)(dian)除塵器的(de)(de)(de)(de)性(xing)能(neng)受粉(fen)塵性(xing)質、設備構造(zao)和煙氣(qi)流(liu)速等三個因素的(de)(de)(de)(de)影響(xiang)。粉(fen)塵的(de)(de)(de)(de)比(bi)電(dian)(dian)(dian)阻(zu)是(shi)評(ping)價導(dao)電(dian)(dian)(dian)性(xing)的(de)(de)(de)(de)指標,它對除塵效率有(you)直接的(de)(de)(de)(de)影響(xiang)。比(bi)電(dian)(dian)(dian)阻(zu)過低(di),塵粒難以保持在集塵電(dian)(dian)(dian)極上,致(zhi)使其重(zhong)返(fan)氣(qi)流(liu)。比(bi)電(dian)(dian)(dian)阻(zu)過高(gao),到達集塵電(dian)(dian)(dian)極的(de)(de)(de)(de)塵粒電(dian)(dian)(dian)荷不易放出(chu),在塵層之間形成(cheng)電(dian)(dian)(dian)壓梯度(du)會產生(sheng)局部擊穿和放電(dian)(dian)(dian)現象。這(zhe)些情況都會造(zao)成(cheng)除塵效率下(xia)降。
電(dian)除塵(chen)器的(de)(de)基本(ben)原理(li)(li)是利用(yong)電(dian)力捕集煙氣中的(de)(de)粉塵(chen),主要(yao)包括(kuo)以下四個相互有關(guan)的(de)(de)物(wu)理(li)(li)過程(cheng): (1) 氣體的(de)(de)電(dian)離。(2) 粉塵(chen)的(de)(de)荷電(dian)。(3) 荷電(dian)粉塵(chen)向電(dian)極移(yi)動。(4) 荷電(dian)粉塵(chen)的(de)(de)捕集。