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)式靜電(dian)(dian)(dian)除塵(chen)(chen)(chen)(chen)(chen)器是以(yi)靜電(dian)(dian)(dian)凈(jing)化法來(lai)(lai)(lai)(lai)收(shou)捕廢氣(qi)中(zhong)的(de)粉塵(chen)(chen)(chen)(chen)(chen),它的(de)凈(jing)化工作上(shang)要(yao)是依靠電(dian)(dian)(dian)暈(yun)(yun)極(ji)和(he)沉(chen)(chen)淀兩個系(xi)統(tong)來(lai)(lai)(lai)(lai)完成的(de),當(dang)含塵(chen)(chen)(chen)(chen)(chen)氣(qi)體(ti)(ti)進(jin)人氣(qi)刺叭時,含塵(chen)(chen)(chen)(chen)(chen)氣(qi)體(ti)(ti)受到氣(qi)流分布板以(yi)及折(zhe)流板的(de)調整(zheng)后,使(shi)氣(qi)流能較均勻地進(jin)人電(dian)(dian)(dian)場。在橫斷面擴大的(de)作用下(xia),氣(qi)流速度迅速降(jiang)低(di),其中(zhong)有(you)些較重的(de)塵(chen)(chen)(chen)(chen)(chen)粒(li)便失去(qu)速度而沉(chen)(chen)降(jiang)下(xia)來(lai)(lai)(lai)(lai)。進(jin)人電(dian)(dian)(dian)場的(de)含塵(chen)(chen)(chen)(chen)(chen)氣(qi)體(ti)(ti)由于電(dian)(dian)(dian)暈(yun)(yun)極(ji)通人高壓直流電(dian)(dian)(dian),則在電(dian)(dian)(dian)暈(yun)(yun)極(ji)附近產生電(dian)(dian)(dian)暈(yun)(yun)現象,使(shi)氣(qi)體(ti)(ti)電(dian)(dian)(dian)離(li)(li),電(dian)(dian)(dian)離(li)(li)后的(de)氣(qi)體(ti)(ti)中(zhong)存在大量的(de)電(dian)(dian)(dian)子(zi)(zi)和(he)離(li)(li)子(zi)(zi),這些電(dian)(dian)(dian)子(zi)(zi)和(he)離(li)(li)子(zi)(zi)與進(jin)人電(dian)(dian)(dian)場的(de)粉塵(chen)(chen)(chen)(chen)(chen)結合起(qi)來(lai)(lai)(lai)(lai),使(shi)塵(chen)(chen)(chen)(chen)(chen)粒(li)帶電(dian)(dian)(dian),帶電(dian)(dian)(dian)塵(chen)(chen)(chen)(chen)(chen)粒(li)在電(dian)(dian)(dian)場力的(de)作用下(xia)趨向本設備陽(yang)極(ji)(正極(ji)、本設備采用負高壓制)和(he)陰(yin)極(ji)(負極(ji)) , 釋放出電(dian)(dian)(dian)子(zi)(zi)分別(bie)沉(chen)(chen)積在相應的(de)電(dian)(dian)(dian)極(ji)上(shang),通過設備陰(yin)陽(yang)極(ji)振(zhen)(zhen)打系(xi)統(tong)的(de)振(zhen)(zhen)打,使(shi)沉(chen)(chen)積在陰(yin)陽(yang)電(dian)(dian)(dian)極(ji)上(shang)的(de)粉塵(chen)(chen)(chen)(chen)(chen)振(zhen)(zhen)落,進(jin)人集灰斗(dou) 通過排灰裝置放出,回(hui)收(shou)有(you)物料,被)凈(jing)化的(de)氣(qi)體(ti)(ti)排入大氣(qi)。
工作原理
靜電(dian)除塵(chen)(chen)器的(de)工作原理是利用高壓電(dian)場使(shi)煙氣發生電(dian)離(li),氣流中的(de)粉(fen)塵(chen)(chen)荷(he)電(dian)在電(dian)場作用下與氣流分離(li)。負極(ji)由(you)不(bu)同斷(duan)面形(xing)狀(zhuang)的(de)金屬(shu)導(dao)線(xian)制成(cheng)(cheng),叫放(fang)(fang)電(dian)電(dian)極(ji)。正(zheng)極(ji)由(you)不(bu)同幾(ji)何(he)形(xing)狀(zhuang)的(de)金屬(shu)板制成(cheng)(cheng),叫集塵(chen)(chen)電(dian)極(ji)。靜電(dian)除塵(chen)(chen)器的(de)性(xing)能受粉(fen)塵(chen)(chen)性(xing)質、設備構造(zao)(zao)和煙氣流速等三個因(yin)素的(de)影響。粉(fen)塵(chen)(chen)的(de)比(bi)電(dian)阻(zu)(zu)是評價導(dao)電(dian)性(xing)的(de)指標,它對除塵(chen)(chen)效率有(you)直接的(de)影響。比(bi)電(dian)阻(zu)(zu)過低,塵(chen)(chen)粒(li)難以(yi)保持在集塵(chen)(chen)電(dian)極(ji)上,致使(shi)其重返氣流。比(bi)電(dian)阻(zu)(zu)過高,到達集塵(chen)(chen)電(dian)極(ji)的(de)塵(chen)(chen)粒(li)電(dian)荷(he)不(bu)易放(fang)(fang)出(chu),在塵(chen)(chen)層之間形(xing)成(cheng)(cheng)電(dian)壓梯度(du)會(hui)產生局(ju)部擊穿和放(fang)(fang)電(dian)現象。這些情況都會(hui)造(zao)(zao)成(cheng)(cheng)除塵(chen)(chen)效率下降。
電除塵(chen)器的(de)基本原理是(shi)利用電力捕集煙(yan)氣中的(de)粉塵(chen),主要(yao)包括以下四個(ge)相互(hu)有關的(de)物理過程: (1) 氣體的(de)電離。(2) 粉塵(chen)的(de)荷(he)電。(3) 荷(he)電粉塵(chen)向(xiang)電極(ji)移(yi)動。(4) 荷(he)電粉塵(chen)的(de)捕集。