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)除塵(chen)(chen)器是以靜電(dian)(dian)凈化法來(lai)收捕廢氣(qi)中(zhong)的(de)(de)(de)(de)粉(fen)塵(chen)(chen),它(ta)的(de)(de)(de)(de)凈化工作(zuo)上(shang)(shang)要是依靠電(dian)(dian)暈極(ji)(ji)(ji)(ji)和(he)沉(chen)淀兩個系(xi)統(tong)(tong)來(lai)完成的(de)(de)(de)(de),當含(han)塵(chen)(chen)氣(qi)體(ti)(ti)(ti)進(jin)(jin)人氣(qi)刺叭(ba)時(shi),含(han)塵(chen)(chen)氣(qi)體(ti)(ti)(ti)受到氣(qi)流分布板以及折(zhe)流板的(de)(de)(de)(de)調整后(hou),使(shi)(shi)氣(qi)流能較均勻地進(jin)(jin)人電(dian)(dian)場(chang)。在(zai)橫斷(duan)面擴大的(de)(de)(de)(de)作(zuo)用下,氣(qi)流速(su)度迅速(su)降低(di),其(qi)中(zhong)有些較重的(de)(de)(de)(de)塵(chen)(chen)粒(li)便失去速(su)度而沉(chen)降下來(lai)。進(jin)(jin)人電(dian)(dian)場(chang)的(de)(de)(de)(de)含(han)塵(chen)(chen)氣(qi)體(ti)(ti)(ti)由于電(dian)(dian)暈極(ji)(ji)(ji)(ji)通(tong)人高壓直流電(dian)(dian),則在(zai)電(dian)(dian)暈極(ji)(ji)(ji)(ji)附近產生電(dian)(dian)暈現(xian)象,使(shi)(shi)氣(qi)體(ti)(ti)(ti)電(dian)(dian)離,電(dian)(dian)離后(hou)的(de)(de)(de)(de)氣(qi)體(ti)(ti)(ti)中(zhong)存在(zai)大量的(de)(de)(de)(de)電(dian)(dian)子(zi)(zi)和(he)離子(zi)(zi),這些電(dian)(dian)子(zi)(zi)和(he)離子(zi)(zi)與進(jin)(jin)人電(dian)(dian)場(chang)的(de)(de)(de)(de)粉(fen)塵(chen)(chen)結合起(qi)來(lai),使(shi)(shi)塵(chen)(chen)粒(li)帶電(dian)(dian),帶電(dian)(dian)塵(chen)(chen)粒(li)在(zai)電(dian)(dian)場(chang)力的(de)(de)(de)(de)作(zuo)用下趨向本(ben)設備(bei)(bei)陽(yang)(yang)極(ji)(ji)(ji)(ji)(正極(ji)(ji)(ji)(ji)、本(ben)設備(bei)(bei)采(cai)用負高壓制)和(he)陰極(ji)(ji)(ji)(ji)(負極(ji)(ji)(ji)(ji)) , 釋(shi)放(fang)出電(dian)(dian)子(zi)(zi)分別沉(chen)積(ji)(ji)在(zai)相應(ying)的(de)(de)(de)(de)電(dian)(dian)極(ji)(ji)(ji)(ji)上(shang)(shang),通(tong)過設備(bei)(bei)陰陽(yang)(yang)極(ji)(ji)(ji)(ji)振打系(xi)統(tong)(tong)的(de)(de)(de)(de)振打,使(shi)(shi)沉(chen)積(ji)(ji)在(zai)陰陽(yang)(yang)電(dian)(dian)極(ji)(ji)(ji)(ji)上(shang)(shang)的(de)(de)(de)(de)粉(fen)塵(chen)(chen)振落,進(jin)(jin)人集(ji)灰斗 通(tong)過排灰裝置放(fang)出,回收有物料,被)凈化的(de)(de)(de)(de)氣(qi)體(ti)(ti)(ti)排入大氣(qi)。
工作(zuo)原(yuan)理
靜電(dian)(dian)(dian)(dian)除塵(chen)器的(de)(de)工(gong)作原理是利(li)用高壓電(dian)(dian)(dian)(dian)場使煙氣(qi)發生電(dian)(dian)(dian)(dian)離(li),氣(qi)流中的(de)(de)粉(fen)塵(chen)荷(he)電(dian)(dian)(dian)(dian)在電(dian)(dian)(dian)(dian)場作用下與氣(qi)流分離(li)。負(fu)極由不(bu)同斷面形(xing)狀的(de)(de)金(jin)屬(shu)(shu)導(dao)線(xian)制成,叫放電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)極。正極由不(bu)同幾何形(xing)狀的(de)(de)金(jin)屬(shu)(shu)板制成,叫集(ji)塵(chen)電(dian)(dian)(dian)(dian)極。靜電(dian)(dian)(dian)(dian)除塵(chen)器的(de)(de)性能受粉(fen)塵(chen)性質、設備構造和(he)煙氣(qi)流速等三個因素的(de)(de)影響。粉(fen)塵(chen)的(de)(de)比電(dian)(dian)(dian)(dian)阻是評(ping)價導(dao)電(dian)(dian)(dian)(dian)性的(de)(de)指(zhi)標,它對除塵(chen)效率有直接(jie)的(de)(de)影響。比電(dian)(dian)(dian)(dian)阻過低,塵(chen)粒難以(yi)保持在集(ji)塵(chen)電(dian)(dian)(dian)(dian)極上,致使其(qi)重返氣(qi)流。比電(dian)(dian)(dian)(dian)阻過高,到(dao)達集(ji)塵(chen)電(dian)(dian)(dian)(dian)極的(de)(de)塵(chen)粒電(dian)(dian)(dian)(dian)荷(he)不(bu)易放出,在塵(chen)層之間(jian)形(xing)成電(dian)(dian)(dian)(dian)壓梯度會(hui)產生局部擊穿和(he)放電(dian)(dian)(dian)(dian)現(xian)象。這些(xie)情況(kuang)都會(hui)造成除塵(chen)效率下降。
電除塵(chen)器的(de)(de)基本原理是利用電力捕(bu)集(ji)煙氣(qi)中的(de)(de)粉(fen)塵(chen),主(zhu)要包括(kuo)以下四個相互有關(guan)的(de)(de)物理過程: (1) 氣(qi)體的(de)(de)電離。(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(bu)集(ji)。