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)(dian)(dian)(dian)(dian)(dian)除(chu)塵(chen)(chen)(chen)器是(shi)以(yi)靜電(dian)(dian)(dian)(dian)(dian)(dian)(dian)凈化(hua)法(fa)來收捕廢氣(qi)(qi)中(zhong)的(de)(de)粉(fen)塵(chen)(chen)(chen),它的(de)(de)凈化(hua)工作上要是(shi)依靠電(dian)(dian)(dian)(dian)(dian)(dian)(dian)暈極(ji)(ji)(ji)和沉淀兩個系統來完成的(de)(de),當含(han)塵(chen)(chen)(chen)氣(qi)(qi)體進(jin)人氣(qi)(qi)刺(ci)叭時,含(han)塵(chen)(chen)(chen)氣(qi)(qi)體受到(dao)氣(qi)(qi)流(liu)分布板以(yi)及(ji)折流(liu)板的(de)(de)調整后(hou),使(shi)(shi)氣(qi)(qi)流(liu)能(neng)較均勻地(di)進(jin)人電(dian)(dian)(dian)(dian)(dian)(dian)(dian)場。在(zai)橫斷面(mian)擴大的(de)(de)作用(yong)下(xia)(xia),氣(qi)(qi)流(liu)速度迅速降低,其中(zhong)有些較重的(de)(de)塵(chen)(chen)(chen)粒便(bian)失去速度而(er)沉降下(xia)(xia)來。進(jin)人電(dian)(dian)(dian)(dian)(dian)(dian)(dian)場的(de)(de)含(han)塵(chen)(chen)(chen)氣(qi)(qi)體由于(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)暈極(ji)(ji)(ji)通(tong)人高壓直流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian),則(ze)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)暈極(ji)(ji)(ji)附近產生電(dian)(dian)(dian)(dian)(dian)(dian)(dian)暈現(xian)象,使(shi)(shi)氣(qi)(qi)體電(dian)(dian)(dian)(dian)(dian)(dian)(dian)離(li),電(dian)(dian)(dian)(dian)(dian)(dian)(dian)離(li)后(hou)的(de)(de)氣(qi)(qi)體中(zhong)存在(zai)大量的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子和離(li)子,這些電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子和離(li)子與進(jin)人電(dian)(dian)(dian)(dian)(dian)(dian)(dian)場的(de)(de)粉(fen)塵(chen)(chen)(chen)結(jie)合起來,使(shi)(shi)塵(chen)(chen)(chen)粒帶(dai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian),帶(dai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)塵(chen)(chen)(chen)粒在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)場力的(de)(de)作用(yong)下(xia)(xia)趨向本(ben)(ben)設備陽(yang)極(ji)(ji)(ji)(正極(ji)(ji)(ji)、本(ben)(ben)設備采用(yong)負高壓制(zhi))和陰(yin)極(ji)(ji)(ji)(負極(ji)(ji)(ji)) , 釋放出電(dian)(dian)(dian)(dian)(dian)(dian)(dian)子分別沉積(ji)在(zai)相應(ying)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)上,通(tong)過設備陰(yin)陽(yang)極(ji)(ji)(ji)振(zhen)打系統的(de)(de)振(zhen)打,使(shi)(shi)沉積(ji)在(zai)陰(yin)陽(yang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)上的(de)(de)粉(fen)塵(chen)(chen)(chen)振(zhen)落,進(jin)人集灰(hui)斗 通(tong)過排灰(hui)裝置放出,回收有物料,被)凈化(hua)的(de)(de)氣(qi)(qi)體排入大氣(qi)(qi)。
工(gong)作原理
靜(jing)電(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)器(qi)的(de)(de)(de)工作(zuo)原理是利用高壓電(dian)(dian)(dian)(dian)(dian)場(chang)使煙(yan)氣(qi)(qi)發生電(dian)(dian)(dian)(dian)(dian)離,氣(qi)(qi)流(liu)中的(de)(de)(de)粉(fen)(fen)塵(chen)(chen)荷電(dian)(dian)(dian)(dian)(dian)在電(dian)(dian)(dian)(dian)(dian)場(chang)作(zuo)用下與氣(qi)(qi)流(liu)分離。負極(ji)由不同斷面形狀的(de)(de)(de)金(jin)屬導線制(zhi)成,叫放(fang)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)極(ji)。正(zheng)極(ji)由不同幾何形狀的(de)(de)(de)金(jin)屬板制(zhi)成,叫集塵(chen)(chen)電(dian)(dian)(dian)(dian)(dian)極(ji)。靜(jing)電(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)器(qi)的(de)(de)(de)性能受粉(fen)(fen)塵(chen)(chen)性質、設備構(gou)造(zao)和煙(yan)氣(qi)(qi)流(liu)速等三個因(yin)素的(de)(de)(de)影響。粉(fen)(fen)塵(chen)(chen)的(de)(de)(de)比電(dian)(dian)(dian)(dian)(dian)阻是評價導電(dian)(dian)(dian)(dian)(dian)性的(de)(de)(de)指標(biao),它對除塵(chen)(chen)效率有直(zhi)接的(de)(de)(de)影響。比電(dian)(dian)(dian)(dian)(dian)阻過(guo)低,塵(chen)(chen)粒難以保持(chi)在集塵(chen)(chen)電(dian)(dian)(dian)(dian)(dian)極(ji)上,致使其重返氣(qi)(qi)流(liu)。比電(dian)(dian)(dian)(dian)(dian)阻過(guo)高,到(dao)達(da)集塵(chen)(chen)電(dian)(dian)(dian)(dian)(dian)極(ji)的(de)(de)(de)塵(chen)(chen)粒電(dian)(dian)(dian)(dian)(dian)荷不易放(fang)出(chu),在塵(chen)(chen)層之(zhi)間形成電(dian)(dian)(dian)(dian)(dian)壓梯度會(hui)產生局部擊穿和放(fang)電(dian)(dian)(dian)(dian)(dian)現象。這些(xie)情(qing)況都會(hui)造(zao)成除塵(chen)(chen)效率下降(jiang)。
電(dian)(dian)(dian)除塵器(qi)的(de)基本原理(li)是利用電(dian)(dian)(dian)力捕(bu)集煙氣中(zhong)的(de)粉塵,主(zhu)要包括以下四個相(xiang)互有關(guan)的(de)物理(li)過程: (1) 氣體的(de)電(dian)(dian)(dian)離。(2) 粉塵的(de)荷(he)電(dian)(dian)(dian)。(3) 荷(he)電(dian)(dian)(dian)粉塵向(xiang)電(dian)(dian)(dian)極移動。(4) 荷(he)電(dian)(dian)(dian)粉塵的(de)捕(bu)集。