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)器是(shi)以靜(jing)電(dian)(dian)凈(jing)化(hua)法來(lai)收捕(bu)廢氣(qi)中的(de)粉(fen)塵(chen),它的(de)凈(jing)化(hua)工作(zuo)上要是(shi)依靠(kao)電(dian)(dian)暈(yun)(yun)極(ji)和沉(chen)淀(dian)兩個系統來(lai)完成的(de),當含塵(chen)氣(qi)體進(jin)(jin)人(ren)(ren)氣(qi)刺叭時,含塵(chen)氣(qi)體受到(dao)氣(qi)流分布(bu)板(ban)以及(ji)折流板(ban)的(de)調整后(hou),使(shi)氣(qi)流能較(jiao)均勻地進(jin)(jin)人(ren)(ren)電(dian)(dian)場。在橫(heng)斷面擴大(da)(da)的(de)作(zuo)用下(xia),氣(qi)流速度迅速降低,其(qi)中有些(xie)較(jiao)重的(de)塵(chen)粒(li)便失去速度而沉(chen)降下(xia)來(lai)。進(jin)(jin)人(ren)(ren)電(dian)(dian)場的(de)含塵(chen)氣(qi)體由于電(dian)(dian)暈(yun)(yun)極(ji)通人(ren)(ren)高(gao)壓直流電(dian)(dian),則在電(dian)(dian)暈(yun)(yun)極(ji)附近產生(sheng)電(dian)(dian)暈(yun)(yun)現象(xiang),使(shi)氣(qi)體電(dian)(dian)離(li),電(dian)(dian)離(li)后(hou)的(de)氣(qi)體中存在大(da)(da)量的(de)電(dian)(dian)子(zi)和離(li)子(zi),這些(xie)電(dian)(dian)子(zi)和離(li)子(zi)與進(jin)(jin)人(ren)(ren)電(dian)(dian)場的(de)粉(fen)塵(chen)結合起來(lai),使(shi)塵(chen)粒(li)帶電(dian)(dian),帶電(dian)(dian)塵(chen)粒(li)在電(dian)(dian)場力的(de)作(zuo)用下(xia)趨向(xiang)本設備陽極(ji)(正極(ji)、本設備采(cai)用負(fu)(fu)高(gao)壓制)和陰極(ji)(負(fu)(fu)極(ji)) , 釋放(fang)出電(dian)(dian)子(zi)分別沉(chen)積在相(xiang)應(ying)的(de)電(dian)(dian)極(ji)上,通過設備陰陽極(ji)振打(da)系統的(de)振打(da),使(shi)沉(chen)積在陰陽電(dian)(dian)極(ji)上的(de)粉(fen)塵(chen)振落,進(jin)(jin)人(ren)(ren)集灰斗 通過排灰裝置放(fang)出,回收有物料,被)凈(jing)化(hua)的(de)氣(qi)體排入大(da)(da)氣(qi)。
工作原(yuan)理
靜電(dian)(dian)(dian)除(chu)(chu)塵(chen)(chen)(chen)器的(de)(de)(de)工作原理(li)是(shi)利用高壓電(dian)(dian)(dian)場使煙氣發生(sheng)電(dian)(dian)(dian)離,氣流(liu)(liu)(liu)中的(de)(de)(de)粉(fen)塵(chen)(chen)(chen)荷電(dian)(dian)(dian)在電(dian)(dian)(dian)場作用下(xia)與氣流(liu)(liu)(liu)分離。負(fu)極(ji)由不(bu)同斷面(mian)形狀的(de)(de)(de)金(jin)屬導線制成,叫(jiao)放(fang)電(dian)(dian)(dian)電(dian)(dian)(dian)極(ji)。正極(ji)由不(bu)同幾何形狀的(de)(de)(de)金(jin)屬板(ban)制成,叫(jiao)集(ji)(ji)塵(chen)(chen)(chen)電(dian)(dian)(dian)極(ji)。靜電(dian)(dian)(dian)除(chu)(chu)塵(chen)(chen)(chen)器的(de)(de)(de)性能受粉(fen)塵(chen)(chen)(chen)性質、設備構(gou)造和煙氣流(liu)(liu)(liu)速等三個因素的(de)(de)(de)影(ying)響(xiang)。粉(fen)塵(chen)(chen)(chen)的(de)(de)(de)比(bi)電(dian)(dian)(dian)阻(zu)是(shi)評價(jia)導電(dian)(dian)(dian)性的(de)(de)(de)指標,它對除(chu)(chu)塵(chen)(chen)(chen)效率(lv)有直接(jie)的(de)(de)(de)影(ying)響(xiang)。比(bi)電(dian)(dian)(dian)阻(zu)過(guo)低,塵(chen)(chen)(chen)粒(li)難以保持在集(ji)(ji)塵(chen)(chen)(chen)電(dian)(dian)(dian)極(ji)上,致(zhi)使其重返氣流(liu)(liu)(liu)。比(bi)電(dian)(dian)(dian)阻(zu)過(guo)高,到達集(ji)(ji)塵(chen)(chen)(chen)電(dian)(dian)(dian)極(ji)的(de)(de)(de)塵(chen)(chen)(chen)粒(li)電(dian)(dian)(dian)荷不(bu)易放(fang)出,在塵(chen)(chen)(chen)層之間形成電(dian)(dian)(dian)壓梯(ti)度(du)會(hui)產(chan)生(sheng)局部擊(ji)穿和放(fang)電(dian)(dian)(dian)現(xian)象。這(zhe)些情況都會(hui)造成除(chu)(chu)塵(chen)(chen)(chen)效率(lv)下(xia)降(jiang)。
電(dian)除塵(chen)(chen)器的(de)(de)基(ji)本原(yuan)理(li)(li)是(shi)利(li)用電(dian)力捕(bu)集煙氣(qi)(qi)中的(de)(de)粉塵(chen)(chen),主要包括以(yi)下四(si)個相互有關的(de)(de)物理(li)(li)過程(cheng): (1) 氣(qi)(qi)體(ti)的(de)(de)電(dian)離。(2) 粉塵(chen)(chen)的(de)(de)荷電(dian)。(3) 荷電(dian)粉塵(chen)(chen)向電(dian)極移(yi)動。(4) 荷電(dian)粉塵(chen)(chen)的(de)(de)捕(bu)集。