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)除塵(chen)器是(shi)以(yi)靜電(dian)凈化(hua)法來(lai)(lai)收捕廢氣(qi)中(zhong)(zhong)的(de)(de)(de)粉塵(chen),它的(de)(de)(de)凈化(hua)工作(zuo)上要是(shi)依靠電(dian)暈極(ji)(ji)(ji)和沉淀(dian)兩個系統來(lai)(lai)完成的(de)(de)(de),當含(han)塵(chen)氣(qi)體(ti)(ti)進人(ren)氣(qi)刺叭時,含(han)塵(chen)氣(qi)體(ti)(ti)受到氣(qi)流(liu)分布板(ban)以(yi)及(ji)折(zhe)流(liu)板(ban)的(de)(de)(de)調整后,使(shi)(shi)氣(qi)流(liu)能較均勻地進人(ren)電(dian)場。在(zai)(zai)橫斷面擴大(da)(da)的(de)(de)(de)作(zuo)用(yong)(yong)下,氣(qi)流(liu)速度迅速降低,其中(zhong)(zhong)有(you)些較重的(de)(de)(de)塵(chen)粒(li)便失去速度而沉降下來(lai)(lai)。進人(ren)電(dian)場的(de)(de)(de)含(han)塵(chen)氣(qi)體(ti)(ti)由于(yu)電(dian)暈極(ji)(ji)(ji)通(tong)人(ren)高(gao)壓(ya)直流(liu)電(dian),則(ze)在(zai)(zai)電(dian)暈極(ji)(ji)(ji)附近(jin)產生電(dian)暈現象,使(shi)(shi)氣(qi)體(ti)(ti)電(dian)離,電(dian)離后的(de)(de)(de)氣(qi)體(ti)(ti)中(zhong)(zhong)存(cun)在(zai)(zai)大(da)(da)量的(de)(de)(de)電(dian)子和離子,這些電(dian)子和離子與(yu)進人(ren)電(dian)場的(de)(de)(de)粉塵(chen)結合起來(lai)(lai),使(shi)(shi)塵(chen)粒(li)帶電(dian),帶電(dian)塵(chen)粒(li)在(zai)(zai)電(dian)場力的(de)(de)(de)作(zuo)用(yong)(yong)下趨向本(ben)設(she)(she)備陽極(ji)(ji)(ji)(正極(ji)(ji)(ji)、本(ben)設(she)(she)備采(cai)用(yong)(yong)負高(gao)壓(ya)制)和陰極(ji)(ji)(ji)(負極(ji)(ji)(ji)) , 釋(shi)放出(chu)電(dian)子分別(bie)沉積在(zai)(zai)相應(ying)的(de)(de)(de)電(dian)極(ji)(ji)(ji)上,通(tong)過設(she)(she)備陰陽極(ji)(ji)(ji)振(zhen)打系統的(de)(de)(de)振(zhen)打,使(shi)(shi)沉積在(zai)(zai)陰陽電(dian)極(ji)(ji)(ji)上的(de)(de)(de)粉塵(chen)振(zhen)落(luo),進人(ren)集(ji)灰(hui)斗 通(tong)過排(pai)灰(hui)裝(zhuang)置(zhi)放出(chu),回收有(you)物料,被)凈化(hua)的(de)(de)(de)氣(qi)體(ti)(ti)排(pai)入大(da)(da)氣(qi)。
工作(zuo)原(yuan)理
靜(jing)電(dian)(dian)(dian)(dian)(dian)除(chu)塵(chen)(chen)器(qi)的(de)工作原理是利用高(gao)壓電(dian)(dian)(dian)(dian)(dian)場使煙氣(qi)發生電(dian)(dian)(dian)(dian)(dian)離,氣(qi)流(liu)中(zhong)的(de)粉塵(chen)(chen)荷電(dian)(dian)(dian)(dian)(dian)在(zai)(zai)電(dian)(dian)(dian)(dian)(dian)場作用下與氣(qi)流(liu)分離。負極(ji)由不(bu)同斷(duan)面形狀(zhuang)的(de)金(jin)(jin)屬(shu)導(dao)線(xian)制成(cheng)(cheng),叫放電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)極(ji)。正極(ji)由不(bu)同幾何形狀(zhuang)的(de)金(jin)(jin)屬(shu)板制成(cheng)(cheng),叫集(ji)塵(chen)(chen)電(dian)(dian)(dian)(dian)(dian)極(ji)。靜(jing)電(dian)(dian)(dian)(dian)(dian)除(chu)塵(chen)(chen)器(qi)的(de)性能受粉塵(chen)(chen)性質、設備構造和煙氣(qi)流(liu)速(su)等三個因素的(de)影響。粉塵(chen)(chen)的(de)比(bi)電(dian)(dian)(dian)(dian)(dian)阻是評價導(dao)電(dian)(dian)(dian)(dian)(dian)性的(de)指標,它對除(chu)塵(chen)(chen)效率有直接的(de)影響。比(bi)電(dian)(dian)(dian)(dian)(dian)阻過(guo)低,塵(chen)(chen)粒難(nan)以保持在(zai)(zai)集(ji)塵(chen)(chen)電(dian)(dian)(dian)(dian)(dian)極(ji)上,致使其重返氣(qi)流(liu)。比(bi)電(dian)(dian)(dian)(dian)(dian)阻過(guo)高(gao),到(dao)達集(ji)塵(chen)(chen)電(dian)(dian)(dian)(dian)(dian)極(ji)的(de)塵(chen)(chen)粒電(dian)(dian)(dian)(dian)(dian)荷不(bu)易(yi)放出,在(zai)(zai)塵(chen)(chen)層之(zhi)間形成(cheng)(cheng)電(dian)(dian)(dian)(dian)(dian)壓梯度會(hui)(hui)產生局部擊(ji)穿和放電(dian)(dian)(dian)(dian)(dian)現象。這些情況都會(hui)(hui)造成(cheng)(cheng)除(chu)塵(chen)(chen)效率下降。
電(dian)(dian)除塵(chen)(chen)器的基本原理(li)是利用電(dian)(dian)力捕集煙氣(qi)中的粉塵(chen)(chen),主要包括以(yi)下四(si)個(ge)相(xiang)互有關的物理(li)過程: (1) 氣(qi)體(ti)的電(dian)(dian)離(li)。(2) 粉塵(chen)(chen)的荷(he)(he)電(dian)(dian)。(3) 荷(he)(he)電(dian)(dian)粉塵(chen)(chen)向電(dian)(dian)極移動。(4) 荷(he)(he)電(dian)(dian)粉塵(chen)(chen)的捕集。