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)除塵器是以(yi)靜電(dian)(dian)(dian)凈化法來(lai)收捕廢氣(qi)中(zhong)的(de)(de)(de)粉(fen)塵,它的(de)(de)(de)凈化工作上(shang)(shang)要是依靠電(dian)(dian)(dian)暈(yun)極(ji)和(he)(he)(he)沉(chen)淀兩個(ge)系(xi)統來(lai)完成的(de)(de)(de),當(dang)含塵氣(qi)體(ti)進(jin)人(ren)(ren)氣(qi)刺(ci)叭時,含塵氣(qi)體(ti)受到氣(qi)流分布板以(yi)及折流板的(de)(de)(de)調整(zheng)后,使(shi)氣(qi)流能較(jiao)均勻地進(jin)人(ren)(ren)電(dian)(dian)(dian)場(chang)。在(zai)橫斷面擴大(da)(da)的(de)(de)(de)作用下,氣(qi)流速度(du)迅(xun)速降低,其(qi)中(zhong)有些較(jiao)重的(de)(de)(de)塵粒便失去(qu)速度(du)而(er)沉(chen)降下來(lai)。進(jin)人(ren)(ren)電(dian)(dian)(dian)場(chang)的(de)(de)(de)含塵氣(qi)體(ti)由于電(dian)(dian)(dian)暈(yun)極(ji)通(tong)人(ren)(ren)高壓直流電(dian)(dian)(dian),則在(zai)電(dian)(dian)(dian)暈(yun)極(ji)附近(jin)產生電(dian)(dian)(dian)暈(yun)現象,使(shi)氣(qi)體(ti)電(dian)(dian)(dian)離,電(dian)(dian)(dian)離后的(de)(de)(de)氣(qi)體(ti)中(zhong)存在(zai)大(da)(da)量的(de)(de)(de)電(dian)(dian)(dian)子(zi)和(he)(he)(he)離子(zi),這些電(dian)(dian)(dian)子(zi)和(he)(he)(he)離子(zi)與進(jin)人(ren)(ren)電(dian)(dian)(dian)場(chang)的(de)(de)(de)粉(fen)塵結合起來(lai),使(shi)塵粒帶電(dian)(dian)(dian),帶電(dian)(dian)(dian)塵粒在(zai)電(dian)(dian)(dian)場(chang)力的(de)(de)(de)作用下趨向(xiang)本設備(bei)陽極(ji)(正極(ji)、本設備(bei)采用負高壓制(zhi))和(he)(he)(he)陰極(ji)(負極(ji)) , 釋(shi)放出電(dian)(dian)(dian)子(zi)分別沉(chen)積在(zai)相應的(de)(de)(de)電(dian)(dian)(dian)極(ji)上(shang)(shang),通(tong)過(guo)(guo)設備(bei)陰陽極(ji)振(zhen)打(da)系(xi)統的(de)(de)(de)振(zhen)打(da),使(shi)沉(chen)積在(zai)陰陽電(dian)(dian)(dian)極(ji)上(shang)(shang)的(de)(de)(de)粉(fen)塵振(zhen)落(luo),進(jin)人(ren)(ren)集灰斗(dou) 通(tong)過(guo)(guo)排(pai)灰裝(zhuang)置放出,回(hui)收有物料,被(bei))凈化的(de)(de)(de)氣(qi)體(ti)排(pai)入(ru)大(da)(da)氣(qi)。
工作原理(li)
靜(jing)電(dian)除(chu)塵(chen)(chen)器的(de)工(gong)作(zuo)原理是利(li)用高(gao)壓電(dian)場使煙氣發生(sheng)電(dian)離,氣流(liu)中(zhong)的(de)粉塵(chen)(chen)荷(he)電(dian)在(zai)電(dian)場作(zuo)用下(xia)與氣流(liu)分離。負極(ji)由不(bu)同(tong)斷面形狀的(de)金(jin)屬(shu)導線(xian)制成(cheng)(cheng)(cheng),叫放電(dian)電(dian)極(ji)。正(zheng)極(ji)由不(bu)同(tong)幾何(he)形狀的(de)金(jin)屬(shu)板制成(cheng)(cheng)(cheng),叫集(ji)塵(chen)(chen)電(dian)極(ji)。靜(jing)電(dian)除(chu)塵(chen)(chen)器的(de)性(xing)(xing)能受粉塵(chen)(chen)性(xing)(xing)質、設備構造(zao)和(he)煙氣流(liu)速等三(san)個因素的(de)影響。粉塵(chen)(chen)的(de)比電(dian)阻(zu)(zu)是評(ping)價導電(dian)性(xing)(xing)的(de)指標(biao),它對除(chu)塵(chen)(chen)效(xiao)率有直接的(de)影響。比電(dian)阻(zu)(zu)過(guo)低,塵(chen)(chen)粒(li)難(nan)以保(bao)持在(zai)集(ji)塵(chen)(chen)電(dian)極(ji)上,致使其重返氣流(liu)。比電(dian)阻(zu)(zu)過(guo)高(gao),到達集(ji)塵(chen)(chen)電(dian)極(ji)的(de)塵(chen)(chen)粒(li)電(dian)荷(he)不(bu)易放出,在(zai)塵(chen)(chen)層之間形成(cheng)(cheng)(cheng)電(dian)壓梯(ti)度會產(chan)生(sheng)局(ju)部擊穿(chuan)和(he)放電(dian)現(xian)象。這些情況(kuang)都會造(zao)成(cheng)(cheng)(cheng)除(chu)塵(chen)(chen)效(xiao)率下(xia)降(jiang)。
電(dian)除塵(chen)器的基本(ben)原理是利用(yong)電(dian)力捕(bu)集煙氣中(zhong)的粉(fen)塵(chen),主要(yao)包括以(yi)下四個相互有關(guan)的物(wu)理過程: (1) 氣體的電(dian)離。(2) 粉(fen)塵(chen)的荷電(dian)。(3) 荷電(dian)粉(fen)塵(chen)向電(dian)極(ji)移動。(4) 荷電(dian)粉(fen)塵(chen)的捕(bu)集。