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(shi)靜電(dian)(dian)(dian)除塵(chen)器是(shi)以靜電(dian)(dian)(dian)凈(jing)(jing)化法來(lai)收捕廢(fei)氣(qi)(qi)(qi)中的(de)(de)(de)粉(fen)塵(chen),它的(de)(de)(de)凈(jing)(jing)化工作(zuo)上要(yao)是(shi)依(yi)靠電(dian)(dian)(dian)暈極(ji)和沉淀兩(liang)個系(xi)(xi)統來(lai)完成的(de)(de)(de),當含塵(chen)氣(qi)(qi)(qi)體進人氣(qi)(qi)(qi)刺叭時(shi),含塵(chen)氣(qi)(qi)(qi)體受到氣(qi)(qi)(qi)流分(fen)布板以及折流板的(de)(de)(de)調整后(hou),使氣(qi)(qi)(qi)流能較均勻地進人電(dian)(dian)(dian)場。在(zai)(zai)橫(heng)斷(duan)面擴大的(de)(de)(de)作(zuo)用(yong)下(xia)(xia),氣(qi)(qi)(qi)流速(su)度迅速(su)降(jiang)低,其(qi)中有些較重的(de)(de)(de)塵(chen)粒便(bian)失(shi)去速(su)度而沉降(jiang)下(xia)(xia)來(lai)。進人電(dian)(dian)(dian)場的(de)(de)(de)含塵(chen)氣(qi)(qi)(qi)體由于電(dian)(dian)(dian)暈極(ji)通(tong)人高(gao)壓直流電(dian)(dian)(dian),則在(zai)(zai)電(dian)(dian)(dian)暈極(ji)附(fu)近產(chan)生電(dian)(dian)(dian)暈現象,使氣(qi)(qi)(qi)體電(dian)(dian)(dian)離,電(dian)(dian)(dian)離后(hou)的(de)(de)(de)氣(qi)(qi)(qi)體中存在(zai)(zai)大量(liang)的(de)(de)(de)電(dian)(dian)(dian)子(zi)和離子(zi),這(zhe)些電(dian)(dian)(dian)子(zi)和離子(zi)與進人電(dian)(dian)(dian)場的(de)(de)(de)粉(fen)塵(chen)結合起來(lai),使塵(chen)粒帶電(dian)(dian)(dian),帶電(dian)(dian)(dian)塵(chen)粒在(zai)(zai)電(dian)(dian)(dian)場力的(de)(de)(de)作(zuo)用(yong)下(xia)(xia)趨向本設備陽(yang)極(ji)(正極(ji)、本設備采用(yong)負(fu)(fu)高(gao)壓制)和陰極(ji)(負(fu)(fu)極(ji)) , 釋放出電(dian)(dian)(dian)子(zi)分(fen)別沉積在(zai)(zai)相應的(de)(de)(de)電(dian)(dian)(dian)極(ji)上,通(tong)過設備陰陽(yang)極(ji)振打(da)系(xi)(xi)統的(de)(de)(de)振打(da),使沉積在(zai)(zai)陰陽(yang)電(dian)(dian)(dian)極(ji)上的(de)(de)(de)粉(fen)塵(chen)振落,進人集(ji)灰斗 通(tong)過排灰裝置放出,回收有物料,被)凈(jing)(jing)化的(de)(de)(de)氣(qi)(qi)(qi)體排入大氣(qi)(qi)(qi)。
工作原理
靜電(dian)(dian)(dian)除塵(chen)(chen)器的(de)(de)工作原(yuan)理是利用(yong)高壓電(dian)(dian)(dian)場(chang)使(shi)煙氣發生電(dian)(dian)(dian)離,氣流(liu)中的(de)(de)粉塵(chen)(chen)荷電(dian)(dian)(dian)在電(dian)(dian)(dian)場(chang)作用(yong)下(xia)與氣流(liu)分(fen)離。負(fu)極(ji)(ji)由不同斷面形(xing)狀的(de)(de)金屬導線制成,叫放(fang)電(dian)(dian)(dian)電(dian)(dian)(dian)極(ji)(ji)。正(zheng)極(ji)(ji)由不同幾(ji)何形(xing)狀的(de)(de)金屬板制成,叫集(ji)塵(chen)(chen)電(dian)(dian)(dian)極(ji)(ji)。靜電(dian)(dian)(dian)除塵(chen)(chen)器的(de)(de)性(xing)能(neng)受粉塵(chen)(chen)性(xing)質、設備構(gou)造(zao)和(he)煙氣流(liu)速(su)等三個因素的(de)(de)影響。粉塵(chen)(chen)的(de)(de)比(bi)(bi)電(dian)(dian)(dian)阻(zu)是評價導電(dian)(dian)(dian)性(xing)的(de)(de)指標,它(ta)對除塵(chen)(chen)效率(lv)有(you)直接的(de)(de)影響。比(bi)(bi)電(dian)(dian)(dian)阻(zu)過低,塵(chen)(chen)粒(li)難(nan)以保持在集(ji)塵(chen)(chen)電(dian)(dian)(dian)極(ji)(ji)上,致(zhi)使(shi)其(qi)重(zhong)返(fan)氣流(liu)。比(bi)(bi)電(dian)(dian)(dian)阻(zu)過高,到(dao)達集(ji)塵(chen)(chen)電(dian)(dian)(dian)極(ji)(ji)的(de)(de)塵(chen)(chen)粒(li)電(dian)(dian)(dian)荷不易放(fang)出(chu),在塵(chen)(chen)層之間形(xing)成電(dian)(dian)(dian)壓梯度會產生局(ju)部擊穿和(he)放(fang)電(dian)(dian)(dian)現象。這些情況(kuang)都會造(zao)成除塵(chen)(chen)效率(lv)下(xia)降(jiang)。
電除塵(chen)器(qi)的(de)(de)基本原(yuan)理(li)是利用電力捕集煙氣(qi)中的(de)(de)粉(fen)塵(chen),主要包括(kuo)以下四個(ge)相互有關(guan)的(de)(de)物理(li)過程(cheng): (1) 氣(qi)體的(de)(de)電離(li)。(2) 粉(fen)塵(chen)的(de)(de)荷電。(3) 荷電粉(fen)塵(chen)向電極移動。(4) 荷電粉(fen)塵(chen)的(de)(de)捕集。