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(jing)電(dian)(dian)(dian)(dian)除塵器是(shi)以靜(jing)電(dian)(dian)(dian)(dian)凈(jing)化法(fa)來(lai)(lai)收(shou)(shou)捕廢氣(qi)中的(de)(de)(de)(de)粉(fen)塵,它(ta)的(de)(de)(de)(de)凈(jing)化工作(zuo)上(shang)要是(shi)依(yi)靠電(dian)(dian)(dian)(dian)暈極(ji)(ji)和沉淀兩個系統(tong)來(lai)(lai)完成的(de)(de)(de)(de),當含(han)塵氣(qi)體(ti)(ti)(ti)進(jin)人(ren)(ren)氣(qi)刺叭時(shi),含(han)塵氣(qi)體(ti)(ti)(ti)受到氣(qi)流分(fen)布(bu)板(ban)(ban)以及(ji)折(zhe)流板(ban)(ban)的(de)(de)(de)(de)調整(zheng)后(hou),使氣(qi)流能較均勻地進(jin)人(ren)(ren)電(dian)(dian)(dian)(dian)場。在(zai)(zai)橫斷面擴大(da)的(de)(de)(de)(de)作(zuo)用下,氣(qi)流速度迅速降低(di),其中有些較重(zhong)的(de)(de)(de)(de)塵粒(li)便失去速度而沉降下來(lai)(lai)。進(jin)人(ren)(ren)電(dian)(dian)(dian)(dian)場的(de)(de)(de)(de)含(han)塵氣(qi)體(ti)(ti)(ti)由于(yu)電(dian)(dian)(dian)(dian)暈極(ji)(ji)通人(ren)(ren)高壓直流電(dian)(dian)(dian)(dian),則在(zai)(zai)電(dian)(dian)(dian)(dian)暈極(ji)(ji)附近產生電(dian)(dian)(dian)(dian)暈現象,使氣(qi)體(ti)(ti)(ti)電(dian)(dian)(dian)(dian)離(li),電(dian)(dian)(dian)(dian)離(li)后(hou)的(de)(de)(de)(de)氣(qi)體(ti)(ti)(ti)中存在(zai)(zai)大(da)量的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)子(zi)和離(li)子(zi),這些電(dian)(dian)(dian)(dian)子(zi)和離(li)子(zi)與進(jin)人(ren)(ren)電(dian)(dian)(dian)(dian)場的(de)(de)(de)(de)粉(fen)塵結合起來(lai)(lai),使塵粒(li)帶電(dian)(dian)(dian)(dian),帶電(dian)(dian)(dian)(dian)塵粒(li)在(zai)(zai)電(dian)(dian)(dian)(dian)場力的(de)(de)(de)(de)作(zuo)用下趨向本設(she)備陽(yang)極(ji)(ji)(正極(ji)(ji)、本設(she)備采用負高壓制)和陰極(ji)(ji)(負極(ji)(ji)) , 釋放(fang)出(chu)電(dian)(dian)(dian)(dian)子(zi)分(fen)別沉積(ji)在(zai)(zai)相應的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)極(ji)(ji)上(shang),通過(guo)設(she)備陰陽(yang)極(ji)(ji)振(zhen)打(da)系統(tong)的(de)(de)(de)(de)振(zhen)打(da),使沉積(ji)在(zai)(zai)陰陽(yang)電(dian)(dian)(dian)(dian)極(ji)(ji)上(shang)的(de)(de)(de)(de)粉(fen)塵振(zhen)落,進(jin)人(ren)(ren)集灰(hui)斗 通過(guo)排灰(hui)裝置放(fang)出(chu),回(hui)收(shou)(shou)有物(wu)料(liao),被)凈(jing)化的(de)(de)(de)(de)氣(qi)體(ti)(ti)(ti)排入大(da)氣(qi)。
工(gong)作原(yuan)理(li)
靜電(dian)(dian)除(chu)(chu)塵(chen)(chen)(chen)器(qi)的(de)(de)(de)工(gong)作(zuo)原理是利用高壓電(dian)(dian)場使煙氣(qi)發生(sheng)電(dian)(dian)離,氣(qi)流(liu)中(zhong)的(de)(de)(de)粉塵(chen)(chen)(chen)荷電(dian)(dian)在電(dian)(dian)場作(zuo)用下(xia)與氣(qi)流(liu)分(fen)離。負極(ji)由(you)不同(tong)斷面形(xing)狀的(de)(de)(de)金屬(shu)導線制成(cheng),叫(jiao)放電(dian)(dian)電(dian)(dian)極(ji)。正(zheng)極(ji)由(you)不同(tong)幾何形(xing)狀的(de)(de)(de)金屬(shu)板(ban)制成(cheng),叫(jiao)集塵(chen)(chen)(chen)電(dian)(dian)極(ji)。靜電(dian)(dian)除(chu)(chu)塵(chen)(chen)(chen)器(qi)的(de)(de)(de)性能受粉塵(chen)(chen)(chen)性質、設備構造和(he)煙氣(qi)流(liu)速(su)等三個因素的(de)(de)(de)影(ying)響。粉塵(chen)(chen)(chen)的(de)(de)(de)比(bi)電(dian)(dian)阻是評價導電(dian)(dian)性的(de)(de)(de)指(zhi)標,它對(dui)除(chu)(chu)塵(chen)(chen)(chen)效率有(you)直接的(de)(de)(de)影(ying)響。比(bi)電(dian)(dian)阻過低(di),塵(chen)(chen)(chen)粒(li)難以(yi)保持在集塵(chen)(chen)(chen)電(dian)(dian)極(ji)上,致(zhi)使其重(zhong)返氣(qi)流(liu)。比(bi)電(dian)(dian)阻過高,到達(da)集塵(chen)(chen)(chen)電(dian)(dian)極(ji)的(de)(de)(de)塵(chen)(chen)(chen)粒(li)電(dian)(dian)荷不易放出,在塵(chen)(chen)(chen)層之間形(xing)成(cheng)電(dian)(dian)壓梯(ti)度會(hui)產生(sheng)局部擊穿和(he)放電(dian)(dian)現(xian)象。這些情況都會(hui)造成(cheng)除(chu)(chu)塵(chen)(chen)(chen)效率下(xia)降。
電(dian)(dian)除塵(chen)器(qi)的基本原理(li)是利用電(dian)(dian)力(li)捕集(ji)煙(yan)氣(qi)中的粉塵(chen),主要(yao)包括以(yi)下四個相互(hu)有關的物(wu)理(li)過程: (1) 氣(qi)體的電(dian)(dian)離(li)。(2) 粉塵(chen)的荷電(dian)(dian)。(3) 荷電(dian)(dian)粉塵(chen)向電(dian)(dian)極移(yi)動(dong)。(4) 荷電(dian)(dian)粉塵(chen)的捕集(ji)。