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)(dian)(dian)除塵(chen)(chen)(chen)器是(shi)以靜(jing)電(dian)(dian)(dian)(dian)凈(jing)化法來(lai)收捕廢(fei)氣(qi)(qi)(qi)(qi)中的(de)(de)(de)(de)粉塵(chen)(chen)(chen),它的(de)(de)(de)(de)凈(jing)化工作上(shang)要是(shi)依靠(kao)電(dian)(dian)(dian)(dian)暈(yun)極(ji)(ji)(ji)(ji)和(he)沉(chen)(chen)淀(dian)兩個系統(tong)來(lai)完(wan)成的(de)(de)(de)(de),當含塵(chen)(chen)(chen)氣(qi)(qi)(qi)(qi)體進(jin)人氣(qi)(qi)(qi)(qi)刺(ci)叭時,含塵(chen)(chen)(chen)氣(qi)(qi)(qi)(qi)體受到氣(qi)(qi)(qi)(qi)流分(fen)布板以及折流板的(de)(de)(de)(de)調(diao)整后(hou),使(shi)氣(qi)(qi)(qi)(qi)流能較(jiao)均勻地進(jin)人電(dian)(dian)(dian)(dian)場。在橫(heng)斷面擴大的(de)(de)(de)(de)作用下,氣(qi)(qi)(qi)(qi)流速(su)度迅速(su)降(jiang)(jiang)低,其(qi)中有些(xie)較(jiao)重的(de)(de)(de)(de)塵(chen)(chen)(chen)粒便失去速(su)度而沉(chen)(chen)降(jiang)(jiang)下來(lai)。進(jin)人電(dian)(dian)(dian)(dian)場的(de)(de)(de)(de)含塵(chen)(chen)(chen)氣(qi)(qi)(qi)(qi)體由(you)于電(dian)(dian)(dian)(dian)暈(yun)極(ji)(ji)(ji)(ji)通(tong)人高壓直流電(dian)(dian)(dian)(dian),則在電(dian)(dian)(dian)(dian)暈(yun)極(ji)(ji)(ji)(ji)附(fu)近產(chan)生電(dian)(dian)(dian)(dian)暈(yun)現象,使(shi)氣(qi)(qi)(qi)(qi)體電(dian)(dian)(dian)(dian)離(li),電(dian)(dian)(dian)(dian)離(li)后(hou)的(de)(de)(de)(de)氣(qi)(qi)(qi)(qi)體中存在大量的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)子和(he)離(li)子,這些(xie)電(dian)(dian)(dian)(dian)子和(he)離(li)子與進(jin)人電(dian)(dian)(dian)(dian)場的(de)(de)(de)(de)粉塵(chen)(chen)(chen)結合起(qi)來(lai),使(shi)塵(chen)(chen)(chen)粒帶電(dian)(dian)(dian)(dian),帶電(dian)(dian)(dian)(dian)塵(chen)(chen)(chen)粒在電(dian)(dian)(dian)(dian)場力的(de)(de)(de)(de)作用下趨向(xiang)本設備陽(yang)極(ji)(ji)(ji)(ji)(正極(ji)(ji)(ji)(ji)、本設備采用負(fu)高壓制)和(he)陰極(ji)(ji)(ji)(ji)(負(fu)極(ji)(ji)(ji)(ji)) , 釋放出電(dian)(dian)(dian)(dian)子分(fen)別沉(chen)(chen)積在相(xiang)應的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)上(shang),通(tong)過設備陰陽(yang)極(ji)(ji)(ji)(ji)振(zhen)打系統(tong)的(de)(de)(de)(de)振(zhen)打,使(shi)沉(chen)(chen)積在陰陽(yang)電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)上(shang)的(de)(de)(de)(de)粉塵(chen)(chen)(chen)振(zhen)落,進(jin)人集(ji)灰(hui)斗 通(tong)過排(pai)灰(hui)裝置放出,回收有物料,被(bei))凈(jing)化的(de)(de)(de)(de)氣(qi)(qi)(qi)(qi)體排(pai)入大氣(qi)(qi)(qi)(qi)。
工作(zuo)原理(li)
靜電(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)器的(de)工作原理是利(li)用(yong)高(gao)壓電(dian)(dian)(dian)(dian)場使煙氣發生(sheng)(sheng)電(dian)(dian)(dian)(dian)離,氣流(liu)中的(de)粉塵(chen)(chen)(chen)(chen)荷電(dian)(dian)(dian)(dian)在(zai)電(dian)(dian)(dian)(dian)場作用(yong)下(xia)與氣流(liu)分離。負極由不同斷(duan)面(mian)形(xing)狀的(de)金屬(shu)導(dao)線制成(cheng)(cheng),叫放電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)極。正極由不同幾(ji)何形(xing)狀的(de)金屬(shu)板制成(cheng)(cheng),叫集塵(chen)(chen)(chen)(chen)電(dian)(dian)(dian)(dian)極。靜電(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)器的(de)性(xing)能受粉塵(chen)(chen)(chen)(chen)性(xing)質、設備構造和煙氣流(liu)速等三(san)個因素的(de)影響(xiang)。粉塵(chen)(chen)(chen)(chen)的(de)比(bi)電(dian)(dian)(dian)(dian)阻是評價導(dao)電(dian)(dian)(dian)(dian)性(xing)的(de)指標,它對除塵(chen)(chen)(chen)(chen)效率有直接的(de)影響(xiang)。比(bi)電(dian)(dian)(dian)(dian)阻過(guo)低(di),塵(chen)(chen)(chen)(chen)粒難以保(bao)持在(zai)集塵(chen)(chen)(chen)(chen)電(dian)(dian)(dian)(dian)極上,致使其重返氣流(liu)。比(bi)電(dian)(dian)(dian)(dian)阻過(guo)高(gao),到(dao)達集塵(chen)(chen)(chen)(chen)電(dian)(dian)(dian)(dian)極的(de)塵(chen)(chen)(chen)(chen)粒電(dian)(dian)(dian)(dian)荷不易(yi)放出,在(zai)塵(chen)(chen)(chen)(chen)層之間(jian)形(xing)成(cheng)(cheng)電(dian)(dian)(dian)(dian)壓梯度(du)會產生(sheng)(sheng)局部(bu)擊穿(chuan)和放電(dian)(dian)(dian)(dian)現象。這些情況都會造成(cheng)(cheng)除塵(chen)(chen)(chen)(chen)效率下(xia)降。
電(dian)(dian)除塵(chen)器(qi)的基本原理(li)是利(li)用電(dian)(dian)力捕集煙氣中的粉(fen)塵(chen),主要包括以下四個相互有(you)關的物理(li)過程: (1) 氣體(ti)的電(dian)(dian)離。(2) 粉(fen)塵(chen)的荷電(dian)(dian)。(3) 荷電(dian)(dian)粉(fen)塵(chen)向電(dian)(dian)極移(yi)動。(4) 荷電(dian)(dian)粉(fen)塵(chen)的捕集。