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)除塵(chen)(chen)器是(shi)以靜(jing)電(dian)(dian)(dian)凈化(hua)法(fa)來(lai)收捕廢氣(qi)中的(de)粉塵(chen)(chen),它的(de)凈化(hua)工作(zuo)上(shang)要是(shi)依(yi)靠電(dian)(dian)(dian)暈極(ji)(ji)(ji)和(he)(he)(he)沉(chen)淀(dian)兩(liang)個系(xi)統來(lai)完成的(de),當含塵(chen)(chen)氣(qi)體進(jin)(jin)人(ren)氣(qi)刺叭時,含塵(chen)(chen)氣(qi)體受到氣(qi)流(liu)分布板(ban)以及折流(liu)板(ban)的(de)調整后,使氣(qi)流(liu)能較(jiao)均勻地進(jin)(jin)人(ren)電(dian)(dian)(dian)場。在(zai)橫斷(duan)面擴大的(de)作(zuo)用(yong)下,氣(qi)流(liu)速度(du)迅速降(jiang)(jiang)低,其中有些(xie)較(jiao)重的(de)塵(chen)(chen)粒(li)便失去速度(du)而(er)沉(chen)降(jiang)(jiang)下來(lai)。進(jin)(jin)人(ren)電(dian)(dian)(dian)場的(de)含塵(chen)(chen)氣(qi)體由于電(dian)(dian)(dian)暈極(ji)(ji)(ji)通(tong)人(ren)高壓直流(liu)電(dian)(dian)(dian),則(ze)在(zai)電(dian)(dian)(dian)暈極(ji)(ji)(ji)附近產生(sheng)電(dian)(dian)(dian)暈現(xian)象,使氣(qi)體電(dian)(dian)(dian)離(li),電(dian)(dian)(dian)離(li)后的(de)氣(qi)體中存(cun)在(zai)大量的(de)電(dian)(dian)(dian)子(zi)和(he)(he)(he)離(li)子(zi),這些(xie)電(dian)(dian)(dian)子(zi)和(he)(he)(he)離(li)子(zi)與進(jin)(jin)人(ren)電(dian)(dian)(dian)場的(de)粉塵(chen)(chen)結合起(qi)來(lai),使塵(chen)(chen)粒(li)帶電(dian)(dian)(dian),帶電(dian)(dian)(dian)塵(chen)(chen)粒(li)在(zai)電(dian)(dian)(dian)場力的(de)作(zuo)用(yong)下趨(qu)向(xiang)本設備(bei)陽(yang)極(ji)(ji)(ji)(正極(ji)(ji)(ji)、本設備(bei)采用(yong)負(fu)高壓制)和(he)(he)(he)陰極(ji)(ji)(ji)(負(fu)極(ji)(ji)(ji)) , 釋放(fang)出電(dian)(dian)(dian)子(zi)分別(bie)沉(chen)積在(zai)相應的(de)電(dian)(dian)(dian)極(ji)(ji)(ji)上(shang),通(tong)過設備(bei)陰陽(yang)極(ji)(ji)(ji)振打系(xi)統的(de)振打,使沉(chen)積在(zai)陰陽(yang)電(dian)(dian)(dian)極(ji)(ji)(ji)上(shang)的(de)粉塵(chen)(chen)振落,進(jin)(jin)人(ren)集灰斗(dou) 通(tong)過排(pai)灰裝置(zhi)放(fang)出,回(hui)收有物料,被)凈化(hua)的(de)氣(qi)體排(pai)入(ru)大氣(qi)。
工作原(yuan)理
靜電(dian)(dian)(dian)(dian)除塵(chen)器的(de)(de)(de)(de)工(gong)作原理是利(li)用高(gao)壓電(dian)(dian)(dian)(dian)場使(shi)煙氣發生(sheng)電(dian)(dian)(dian)(dian)離(li),氣流中的(de)(de)(de)(de)粉(fen)塵(chen)荷電(dian)(dian)(dian)(dian)在(zai)電(dian)(dian)(dian)(dian)場作用下與氣流分離(li)。負極(ji)由不同斷面形狀的(de)(de)(de)(de)金(jin)屬(shu)導(dao)線制成(cheng),叫(jiao)(jiao)放(fang)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)極(ji)。正極(ji)由不同幾何形狀的(de)(de)(de)(de)金(jin)屬(shu)板制成(cheng),叫(jiao)(jiao)集塵(chen)電(dian)(dian)(dian)(dian)極(ji)。靜電(dian)(dian)(dian)(dian)除塵(chen)器的(de)(de)(de)(de)性(xing)能受粉(fen)塵(chen)性(xing)質、設備構(gou)造和煙氣流速等三(san)個因素的(de)(de)(de)(de)影響。粉(fen)塵(chen)的(de)(de)(de)(de)比(bi)電(dian)(dian)(dian)(dian)阻是評價導(dao)電(dian)(dian)(dian)(dian)性(xing)的(de)(de)(de)(de)指(zhi)標,它(ta)對除塵(chen)效率(lv)有直接的(de)(de)(de)(de)影響。比(bi)電(dian)(dian)(dian)(dian)阻過低(di),塵(chen)粒難以保持在(zai)集塵(chen)電(dian)(dian)(dian)(dian)極(ji)上,致使(shi)其重返(fan)氣流。比(bi)電(dian)(dian)(dian)(dian)阻過高(gao),到達集塵(chen)電(dian)(dian)(dian)(dian)極(ji)的(de)(de)(de)(de)塵(chen)粒電(dian)(dian)(dian)(dian)荷不易放(fang)出,在(zai)塵(chen)層之間形成(cheng)電(dian)(dian)(dian)(dian)壓梯(ti)度會(hui)產(chan)生(sheng)局部擊(ji)穿和放(fang)電(dian)(dian)(dian)(dian)現象。這些(xie)情(qing)況都會(hui)造成(cheng)除塵(chen)效率(lv)下降。
電(dian)除(chu)塵(chen)器的(de)(de)基本(ben)原(yuan)理(li)是利用電(dian)力(li)捕集煙氣中的(de)(de)粉塵(chen),主(zhu)要包括(kuo)以下四個相互(hu)有關的(de)(de)物理(li)過程: (1) 氣體(ti)的(de)(de)電(dian)離。(2) 粉塵(chen)的(de)(de)荷(he)電(dian)。(3) 荷(he)電(dian)粉塵(chen)向電(dian)極移動。(4) 荷(he)電(dian)粉塵(chen)的(de)(de)捕集。