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(wo)式(shi)靜(jing)(jing)電(dian)(dian)(dian)(dian)(dian)除塵器是以靜(jing)(jing)電(dian)(dian)(dian)(dian)(dian)凈(jing)化(hua)法來收捕(bu)廢氣(qi)(qi)中(zhong)的(de)(de)粉塵,它的(de)(de)凈(jing)化(hua)工作上要是依靠電(dian)(dian)(dian)(dian)(dian)暈極和沉(chen)淀兩個系統來完(wan)成的(de)(de),當含(han)塵氣(qi)(qi)體(ti)進(jin)人(ren)(ren)(ren)氣(qi)(qi)刺(ci)叭(ba)時(shi),含(han)塵氣(qi)(qi)體(ti)受到氣(qi)(qi)流(liu)分(fen)布板以及折流(liu)板的(de)(de)調(diao)整(zheng)后(hou),使(shi)氣(qi)(qi)流(liu)能較均(jun)勻地進(jin)人(ren)(ren)(ren)電(dian)(dian)(dian)(dian)(dian)場(chang)。在(zai)(zai)橫斷面擴大的(de)(de)作用下,氣(qi)(qi)流(liu)速(su)度迅速(su)降(jiang)低,其(qi)中(zhong)有些較重的(de)(de)塵粒便失去速(su)度而沉(chen)降(jiang)下來。進(jin)人(ren)(ren)(ren)電(dian)(dian)(dian)(dian)(dian)場(chang)的(de)(de)含(han)塵氣(qi)(qi)體(ti)由于電(dian)(dian)(dian)(dian)(dian)暈極通(tong)(tong)人(ren)(ren)(ren)高(gao)壓直流(liu)電(dian)(dian)(dian)(dian)(dian),則在(zai)(zai)電(dian)(dian)(dian)(dian)(dian)暈極附近(jin)產生電(dian)(dian)(dian)(dian)(dian)暈現象,使(shi)氣(qi)(qi)體(ti)電(dian)(dian)(dian)(dian)(dian)離,電(dian)(dian)(dian)(dian)(dian)離后(hou)的(de)(de)氣(qi)(qi)體(ti)中(zhong)存在(zai)(zai)大量的(de)(de)電(dian)(dian)(dian)(dian)(dian)子(zi)和離子(zi),這(zhe)些電(dian)(dian)(dian)(dian)(dian)子(zi)和離子(zi)與進(jin)人(ren)(ren)(ren)電(dian)(dian)(dian)(dian)(dian)場(chang)的(de)(de)粉塵結合起來,使(shi)塵粒帶(dai)電(dian)(dian)(dian)(dian)(dian),帶(dai)電(dian)(dian)(dian)(dian)(dian)塵粒在(zai)(zai)電(dian)(dian)(dian)(dian)(dian)場(chang)力的(de)(de)作用下趨向本設(she)(she)備陽(yang)極(正(zheng)極、本設(she)(she)備采用負(fu)高(gao)壓制)和陰極(負(fu)極) , 釋放出(chu)電(dian)(dian)(dian)(dian)(dian)子(zi)分(fen)別沉(chen)積在(zai)(zai)相應的(de)(de)電(dian)(dian)(dian)(dian)(dian)極上,通(tong)(tong)過設(she)(she)備陰陽(yang)極振打系統的(de)(de)振打,使(shi)沉(chen)積在(zai)(zai)陰陽(yang)電(dian)(dian)(dian)(dian)(dian)極上的(de)(de)粉塵振落,進(jin)人(ren)(ren)(ren)集灰斗 通(tong)(tong)過排(pai)灰裝置(zhi)放出(chu),回收有物料,被(bei))凈(jing)化(hua)的(de)(de)氣(qi)(qi)體(ti)排(pai)入大氣(qi)(qi)。
工作原理
靜電(dian)除(chu)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)(chen)器的(de)(de)工作(zuo)原理是利(li)用(yong)高壓(ya)電(dian)場使煙(yan)氣(qi)(qi)發(fa)生電(dian)離(li),氣(qi)(qi)流(liu)中的(de)(de)粉塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)(chen)荷電(dian)在(zai)(zai)電(dian)場作(zuo)用(yong)下與氣(qi)(qi)流(liu)分離(li)。負(fu)極(ji)由不同(tong)斷面形狀的(de)(de)金(jin)屬(shu)導(dao)線(xian)制成,叫放電(dian)電(dian)極(ji)。正極(ji)由不同(tong)幾何形狀的(de)(de)金(jin)屬(shu)板制成,叫集塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)(chen)電(dian)極(ji)。靜電(dian)除(chu)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)(chen)器的(de)(de)性能(neng)受粉塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)(chen)性質(zhi)、設備構造(zao)和(he)煙(yan)氣(qi)(qi)流(liu)速(su)等三個因素的(de)(de)影響。粉塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)(chen)的(de)(de)比電(dian)阻是評價導(dao)電(dian)性的(de)(de)指標,它對除(chu)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)(chen)效率有直接的(de)(de)影響。比電(dian)阻過(guo)低,塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)(chen)粒難以保持在(zai)(zai)集塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)(chen)電(dian)極(ji)上(shang),致使其重(zhong)返氣(qi)(qi)流(liu)。比電(dian)阻過(guo)高,到達(da)集塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)(chen)電(dian)極(ji)的(de)(de)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)(chen)粒電(dian)荷不易放出,在(zai)(zai)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)(chen)層之間(jian)形成電(dian)壓(ya)梯(ti)度會(hui)產生局部(bu)擊(ji)穿和(he)放電(dian)現象。這些(xie)情(qing)況都會(hui)造(zao)成除(chu)塵(chen)(chen)(chen)(chen)(chen)(chen)(chen)(chen)效率下降(jiang)。
電(dian)(dian)(dian)除塵(chen)(chen)器的(de)(de)基本原理(li)是利用電(dian)(dian)(dian)力(li)捕集煙氣(qi)(qi)中的(de)(de)粉(fen)塵(chen)(chen),主要包括以下四個相互(hu)有關(guan)的(de)(de)物理(li)過程: (1) 氣(qi)(qi)體的(de)(de)電(dian)(dian)(dian)離。(2) 粉(fen)塵(chen)(chen)的(de)(de)荷(he)(he)電(dian)(dian)(dian)。(3) 荷(he)(he)電(dian)(dian)(dian)粉(fen)塵(chen)(chen)向(xiang)電(dian)(dian)(dian)極移動(dong)。(4) 荷(he)(he)電(dian)(dian)(dian)粉(fen)塵(chen)(chen)的(de)(de)捕集。