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)除塵器(qi)是以(yi)靜(jing)電(dian)(dian)(dian)(dian)凈化法來(lai)(lai)收(shou)捕廢氣(qi)中(zhong)的(de)(de)粉塵,它的(de)(de)凈化工作上(shang)要是依靠(kao)電(dian)(dian)(dian)(dian)暈極(ji)(ji)和沉淀兩個系統(tong)來(lai)(lai)完成的(de)(de),當含(han)塵氣(qi)體(ti)(ti)進(jin)人(ren)氣(qi)刺叭時,含(han)塵氣(qi)體(ti)(ti)受到氣(qi)流分布板(ban)以(yi)及折(zhe)流板(ban)的(de)(de)調整后,使氣(qi)流能較(jiao)均(jun)勻地進(jin)人(ren)電(dian)(dian)(dian)(dian)場(chang)(chang)。在(zai)橫斷(duan)面擴大的(de)(de)作用下,氣(qi)流速度迅(xun)速降低,其中(zhong)有些較(jiao)重(zhong)的(de)(de)塵粒便(bian)失(shi)去速度而沉降下來(lai)(lai)。進(jin)人(ren)電(dian)(dian)(dian)(dian)場(chang)(chang)的(de)(de)含(han)塵氣(qi)體(ti)(ti)由于電(dian)(dian)(dian)(dian)暈極(ji)(ji)通人(ren)高(gao)壓(ya)直流電(dian)(dian)(dian)(dian),則在(zai)電(dian)(dian)(dian)(dian)暈極(ji)(ji)附近(jin)產生電(dian)(dian)(dian)(dian)暈現象,使氣(qi)體(ti)(ti)電(dian)(dian)(dian)(dian)離(li),電(dian)(dian)(dian)(dian)離(li)后的(de)(de)氣(qi)體(ti)(ti)中(zhong)存在(zai)大量的(de)(de)電(dian)(dian)(dian)(dian)子和離(li)子,這些電(dian)(dian)(dian)(dian)子和離(li)子與進(jin)人(ren)電(dian)(dian)(dian)(dian)場(chang)(chang)的(de)(de)粉塵結合起來(lai)(lai),使塵粒帶電(dian)(dian)(dian)(dian),帶電(dian)(dian)(dian)(dian)塵粒在(zai)電(dian)(dian)(dian)(dian)場(chang)(chang)力的(de)(de)作用下趨(qu)向本(ben)設(she)備陽(yang)極(ji)(ji)(正極(ji)(ji)、本(ben)設(she)備采用負(fu)高(gao)壓(ya)制)和陰極(ji)(ji)(負(fu)極(ji)(ji)) , 釋放出電(dian)(dian)(dian)(dian)子分別沉積在(zai)相應的(de)(de)電(dian)(dian)(dian)(dian)極(ji)(ji)上(shang),通過(guo)設(she)備陰陽(yang)極(ji)(ji)振打系統(tong)的(de)(de)振打,使沉積在(zai)陰陽(yang)電(dian)(dian)(dian)(dian)極(ji)(ji)上(shang)的(de)(de)粉塵振落,進(jin)人(ren)集灰(hui)斗(dou) 通過(guo)排(pai)灰(hui)裝置放出,回收(shou)有物料(liao),被(bei))凈化的(de)(de)氣(qi)體(ti)(ti)排(pai)入大氣(qi)。
工作原(yuan)理
靜電(dian)(dian)(dian)(dian)除塵(chen)(chen)器的(de)(de)(de)(de)(de)工作(zuo)原理是(shi)利用高壓(ya)(ya)電(dian)(dian)(dian)(dian)場(chang)使煙(yan)氣發生電(dian)(dian)(dian)(dian)離,氣流(liu)中的(de)(de)(de)(de)(de)粉塵(chen)(chen)荷電(dian)(dian)(dian)(dian)在電(dian)(dian)(dian)(dian)場(chang)作(zuo)用下與氣流(liu)分離。負極(ji)(ji)由不同(tong)斷面形(xing)狀的(de)(de)(de)(de)(de)金屬(shu)(shu)導線(xian)制成(cheng),叫放電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)極(ji)(ji)。正極(ji)(ji)由不同(tong)幾何形(xing)狀的(de)(de)(de)(de)(de)金屬(shu)(shu)板(ban)制成(cheng),叫集塵(chen)(chen)電(dian)(dian)(dian)(dian)極(ji)(ji)。靜電(dian)(dian)(dian)(dian)除塵(chen)(chen)器的(de)(de)(de)(de)(de)性能受粉塵(chen)(chen)性質、設備構造和煙(yan)氣流(liu)速等三個因素的(de)(de)(de)(de)(de)影響。粉塵(chen)(chen)的(de)(de)(de)(de)(de)比(bi)電(dian)(dian)(dian)(dian)阻(zu)是(shi)評價(jia)導電(dian)(dian)(dian)(dian)性的(de)(de)(de)(de)(de)指標,它對除塵(chen)(chen)效率(lv)有直接的(de)(de)(de)(de)(de)影響。比(bi)電(dian)(dian)(dian)(dian)阻(zu)過(guo)低(di),塵(chen)(chen)粒難(nan)以保持在集塵(chen)(chen)電(dian)(dian)(dian)(dian)極(ji)(ji)上,致使其(qi)重返氣流(liu)。比(bi)電(dian)(dian)(dian)(dian)阻(zu)過(guo)高,到(dao)達集塵(chen)(chen)電(dian)(dian)(dian)(dian)極(ji)(ji)的(de)(de)(de)(de)(de)塵(chen)(chen)粒電(dian)(dian)(dian)(dian)荷不易放出,在塵(chen)(chen)層之間形(xing)成(cheng)電(dian)(dian)(dian)(dian)壓(ya)(ya)梯度會(hui)產生局部(bu)擊(ji)穿和放電(dian)(dian)(dian)(dian)現(xian)象。這些情況都(dou)會(hui)造成(cheng)除塵(chen)(chen)效率(lv)下降。
電(dian)除塵(chen)(chen)器的(de)(de)基本原理是利用(yong)電(dian)力捕集煙氣中的(de)(de)粉塵(chen)(chen),主要包括以下四個相互有關的(de)(de)物(wu)理過程: (1) 氣體(ti)的(de)(de)電(dian)離。(2) 粉塵(chen)(chen)的(de)(de)荷(he)電(dian)。(3) 荷(he)電(dian)粉塵(chen)(chen)向電(dian)極移(yi)動。(4) 荷(he)電(dian)粉塵(chen)(chen)的(de)(de)捕集。