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)除塵(chen)(chen)器是以靜電(dian)(dian)(dian)凈(jing)化法來收(shou)捕廢氣(qi)中的(de)(de)(de)粉塵(chen)(chen),它的(de)(de)(de)凈(jing)化工作(zuo)(zuo)上要是依靠電(dian)(dian)(dian)暈(yun)極和(he)沉淀兩個系統來完成的(de)(de)(de),當含塵(chen)(chen)氣(qi)體進人(ren)(ren)(ren)(ren)氣(qi)刺叭時(shi),含塵(chen)(chen)氣(qi)體受到氣(qi)流分布板(ban)以及折流板(ban)的(de)(de)(de)調(diao)整后,使(shi)氣(qi)流能較均勻地(di)進人(ren)(ren)(ren)(ren)電(dian)(dian)(dian)場。在橫斷面擴大的(de)(de)(de)作(zuo)(zuo)用下(xia),氣(qi)流速度(du)迅速降(jiang)低,其中有些(xie)較重的(de)(de)(de)塵(chen)(chen)粒便失去速度(du)而(er)沉降(jiang)下(xia)來。進人(ren)(ren)(ren)(ren)電(dian)(dian)(dian)場的(de)(de)(de)含塵(chen)(chen)氣(qi)體由于電(dian)(dian)(dian)暈(yun)極通(tong)人(ren)(ren)(ren)(ren)高(gao)壓直流電(dian)(dian)(dian),則(ze)在電(dian)(dian)(dian)暈(yun)極附近(jin)產生電(dian)(dian)(dian)暈(yun)現象(xiang),使(shi)氣(qi)體電(dian)(dian)(dian)離,電(dian)(dian)(dian)離后的(de)(de)(de)氣(qi)體中存(cun)在大量(liang)的(de)(de)(de)電(dian)(dian)(dian)子和(he)離子,這些(xie)電(dian)(dian)(dian)子和(he)離子與(yu)進人(ren)(ren)(ren)(ren)電(dian)(dian)(dian)場的(de)(de)(de)粉塵(chen)(chen)結合起來,使(shi)塵(chen)(chen)粒帶電(dian)(dian)(dian),帶電(dian)(dian)(dian)塵(chen)(chen)粒在電(dian)(dian)(dian)場力的(de)(de)(de)作(zuo)(zuo)用下(xia)趨向本(ben)設備陽極(正極、本(ben)設備采用負高(gao)壓制)和(he)陰極(負極) , 釋放(fang)出電(dian)(dian)(dian)子分別沉積(ji)在相應的(de)(de)(de)電(dian)(dian)(dian)極上,通(tong)過(guo)設備陰陽極振打系統的(de)(de)(de)振打,使(shi)沉積(ji)在陰陽電(dian)(dian)(dian)極上的(de)(de)(de)粉塵(chen)(chen)振落(luo),進人(ren)(ren)(ren)(ren)集灰斗 通(tong)過(guo)排灰裝置(zhi)放(fang)出,回(hui)收(shou)有物(wu)料,被(bei))凈(jing)化的(de)(de)(de)氣(qi)體排入(ru)大氣(qi)。
工作原理(li)
靜(jing)電(dian)除(chu)塵(chen)(chen)(chen)(chen)器的(de)工作(zuo)原理是(shi)(shi)利用高(gao)壓(ya)電(dian)場使煙氣(qi)發生電(dian)離(li),氣(qi)流(liu)中的(de)粉塵(chen)(chen)(chen)(chen)荷電(dian)在(zai)電(dian)場作(zuo)用下與氣(qi)流(liu)分離(li)。負極由不同斷面(mian)形(xing)狀的(de)金屬導線(xian)制成(cheng),叫放(fang)電(dian)電(dian)極。正極由不同幾何形(xing)狀的(de)金屬板制成(cheng),叫集塵(chen)(chen)(chen)(chen)電(dian)極。靜(jing)電(dian)除(chu)塵(chen)(chen)(chen)(chen)器的(de)性能受粉塵(chen)(chen)(chen)(chen)性質、設備(bei)構造和煙氣(qi)流(liu)速等三個(ge)因(yin)素的(de)影(ying)響。粉塵(chen)(chen)(chen)(chen)的(de)比電(dian)阻(zu)是(shi)(shi)評價導電(dian)性的(de)指標,它對除(chu)塵(chen)(chen)(chen)(chen)效率(lv)有直(zhi)接的(de)影(ying)響。比電(dian)阻(zu)過低,塵(chen)(chen)(chen)(chen)粒難(nan)以(yi)保持(chi)在(zai)集塵(chen)(chen)(chen)(chen)電(dian)極上,致使其重返氣(qi)流(liu)。比電(dian)阻(zu)過高(gao),到(dao)達集塵(chen)(chen)(chen)(chen)電(dian)極的(de)塵(chen)(chen)(chen)(chen)粒電(dian)荷不易放(fang)出,在(zai)塵(chen)(chen)(chen)(chen)層之間(jian)形(xing)成(cheng)電(dian)壓(ya)梯度會(hui)產生局部擊穿和放(fang)電(dian)現(xian)象。這些情況都會(hui)造成(cheng)除(chu)塵(chen)(chen)(chen)(chen)效率(lv)下降。
電(dian)(dian)(dian)(dian)除塵(chen)(chen)器(qi)的(de)基(ji)本原理(li)是利用(yong)電(dian)(dian)(dian)(dian)力捕集(ji)煙氣中的(de)粉塵(chen)(chen),主要包括以下(xia)四個相互有關的(de)物理(li)過程: (1) 氣體(ti)的(de)電(dian)(dian)(dian)(dian)離。(2) 粉塵(chen)(chen)的(de)荷(he)電(dian)(dian)(dian)(dian)。(3) 荷(he)電(dian)(dian)(dian)(dian)粉塵(chen)(chen)向電(dian)(dian)(dian)(dian)極移動。(4) 荷(he)電(dian)(dian)(dian)(dian)粉塵(chen)(chen)的(de)捕集(ji)。