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)(dian)(dian)除塵(chen)(chen)(chen)(chen)器是(shi)以靜電(dian)(dian)(dian)(dian)(dian)凈(jing)化(hua)法(fa)來(lai)收捕廢氣(qi)中(zhong)(zhong)的(de)(de)粉(fen)塵(chen)(chen)(chen)(chen),它(ta)的(de)(de)凈(jing)化(hua)工作上(shang)要是(shi)依(yi)靠電(dian)(dian)(dian)(dian)(dian)暈極(ji)(ji)(ji)(ji)(ji)和(he)沉淀兩(liang)個系(xi)統(tong)(tong)來(lai)完成的(de)(de),當含塵(chen)(chen)(chen)(chen)氣(qi)體進(jin)人氣(qi)刺叭時,含塵(chen)(chen)(chen)(chen)氣(qi)體受到氣(qi)流(liu)(liu)分布板以及折流(liu)(liu)板的(de)(de)調整后(hou),使(shi)氣(qi)流(liu)(liu)能較均勻地(di)進(jin)人電(dian)(dian)(dian)(dian)(dian)場(chang)。在(zai)橫斷面(mian)擴大(da)的(de)(de)作用(yong)(yong)下,氣(qi)流(liu)(liu)速(su)度迅(xun)速(su)降(jiang)低,其中(zhong)(zhong)有些較重的(de)(de)塵(chen)(chen)(chen)(chen)粒便失去速(su)度而(er)沉降(jiang)下來(lai)。進(jin)人電(dian)(dian)(dian)(dian)(dian)場(chang)的(de)(de)含塵(chen)(chen)(chen)(chen)氣(qi)體由于(yu)電(dian)(dian)(dian)(dian)(dian)暈極(ji)(ji)(ji)(ji)(ji)通人高(gao)壓直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian),則在(zai)電(dian)(dian)(dian)(dian)(dian)暈極(ji)(ji)(ji)(ji)(ji)附近(jin)產生(sheng)電(dian)(dian)(dian)(dian)(dian)暈現(xian)象,使(shi)氣(qi)體電(dian)(dian)(dian)(dian)(dian)離,電(dian)(dian)(dian)(dian)(dian)離后(hou)的(de)(de)氣(qi)體中(zhong)(zhong)存(cun)在(zai)大(da)量(liang)的(de)(de)電(dian)(dian)(dian)(dian)(dian)子(zi)和(he)離子(zi),這些電(dian)(dian)(dian)(dian)(dian)子(zi)和(he)離子(zi)與(yu)進(jin)人電(dian)(dian)(dian)(dian)(dian)場(chang)的(de)(de)粉(fen)塵(chen)(chen)(chen)(chen)結合起來(lai),使(shi)塵(chen)(chen)(chen)(chen)粒帶(dai)電(dian)(dian)(dian)(dian)(dian),帶(dai)電(dian)(dian)(dian)(dian)(dian)塵(chen)(chen)(chen)(chen)粒在(zai)電(dian)(dian)(dian)(dian)(dian)場(chang)力的(de)(de)作用(yong)(yong)下趨向本設(she)備(bei)陽(yang)(yang)極(ji)(ji)(ji)(ji)(ji)(正極(ji)(ji)(ji)(ji)(ji)、本設(she)備(bei)采(cai)用(yong)(yong)負高(gao)壓制)和(he)陰(yin)極(ji)(ji)(ji)(ji)(ji)(負極(ji)(ji)(ji)(ji)(ji)) , 釋放(fang)出電(dian)(dian)(dian)(dian)(dian)子(zi)分別沉積(ji)在(zai)相應(ying)的(de)(de)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)(ji)上(shang),通過設(she)備(bei)陰(yin)陽(yang)(yang)極(ji)(ji)(ji)(ji)(ji)振打系(xi)統(tong)(tong)的(de)(de)振打,使(shi)沉積(ji)在(zai)陰(yin)陽(yang)(yang)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)(ji)上(shang)的(de)(de)粉(fen)塵(chen)(chen)(chen)(chen)振落,進(jin)人集(ji)灰(hui)斗 通過排灰(hui)裝(zhuang)置放(fang)出,回收有物料,被)凈(jing)化(hua)的(de)(de)氣(qi)體排入大(da)氣(qi)。
工(gong)作原理
靜電(dian)(dian)(dian)(dian)除(chu)塵(chen)(chen)器的(de)工作原理是利用高壓電(dian)(dian)(dian)(dian)場(chang)使煙(yan)氣發生電(dian)(dian)(dian)(dian)離,氣流中的(de)粉(fen)塵(chen)(chen)荷(he)電(dian)(dian)(dian)(dian)在(zai)電(dian)(dian)(dian)(dian)場(chang)作用下(xia)與氣流分(fen)離。負(fu)極由不同斷面形狀的(de)金屬(shu)導線制成(cheng)(cheng),叫放(fang)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)極。正(zheng)極由不同幾何形狀的(de)金屬(shu)板制成(cheng)(cheng),叫集(ji)(ji)塵(chen)(chen)電(dian)(dian)(dian)(dian)極。靜電(dian)(dian)(dian)(dian)除(chu)塵(chen)(chen)器的(de)性(xing)能受(shou)粉(fen)塵(chen)(chen)性(xing)質、設備構造和煙(yan)氣流速等三個因素的(de)影響。粉(fen)塵(chen)(chen)的(de)比電(dian)(dian)(dian)(dian)阻是評價導電(dian)(dian)(dian)(dian)性(xing)的(de)指(zhi)標(biao),它對除(chu)塵(chen)(chen)效率(lv)有直接的(de)影響。比電(dian)(dian)(dian)(dian)阻過低(di),塵(chen)(chen)粒難以保(bao)持在(zai)集(ji)(ji)塵(chen)(chen)電(dian)(dian)(dian)(dian)極上,致(zhi)使其重返(fan)氣流。比電(dian)(dian)(dian)(dian)阻過高,到達集(ji)(ji)塵(chen)(chen)電(dian)(dian)(dian)(dian)極的(de)塵(chen)(chen)粒電(dian)(dian)(dian)(dian)荷(he)不易放(fang)出,在(zai)塵(chen)(chen)層(ceng)之(zhi)間(jian)形成(cheng)(cheng)電(dian)(dian)(dian)(dian)壓梯度會產生局部(bu)擊穿和放(fang)電(dian)(dian)(dian)(dian)現象。這些(xie)情(qing)況都會造成(cheng)(cheng)除(chu)塵(chen)(chen)效率(lv)下(xia)降。
電(dian)除塵器的基本原理是利用電(dian)力(li)捕(bu)集煙氣中的粉塵,主要(yao)包括以下四個(ge)相互(hu)有關的物(wu)理過程(cheng): (1) 氣體的電(dian)離。(2) 粉塵的荷(he)電(dian)。(3) 荷(he)電(dian)粉塵向電(dian)極移動。(4) 荷(he)電(dian)粉塵的捕(bu)集。