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)器是以靜電(dian)(dian)(dian)(dian)(dian)凈(jing)化法來收(shou)捕廢氣(qi)(qi)中的(de)(de)(de)粉(fen)(fen)塵(chen),它(ta)的(de)(de)(de)凈(jing)化工作上(shang)要是依靠電(dian)(dian)(dian)(dian)(dian)暈(yun)極(ji)(ji)(ji)(ji)和沉(chen)(chen)淀兩個系統來完成的(de)(de)(de),當含(han)塵(chen)氣(qi)(qi)體進人(ren)氣(qi)(qi)刺(ci)叭時(shi),含(han)塵(chen)氣(qi)(qi)體受到氣(qi)(qi)流(liu)分(fen)布(bu)板(ban)以及折流(liu)板(ban)的(de)(de)(de)調(diao)整后,使氣(qi)(qi)流(liu)能(neng)較(jiao)均勻(yun)地進人(ren)電(dian)(dian)(dian)(dian)(dian)場。在橫斷面擴大(da)的(de)(de)(de)作用下(xia)(xia),氣(qi)(qi)流(liu)速度迅速降低,其中有些較(jiao)重的(de)(de)(de)塵(chen)粒(li)便(bian)失去速度而沉(chen)(chen)降下(xia)(xia)來。進人(ren)電(dian)(dian)(dian)(dian)(dian)場的(de)(de)(de)含(han)塵(chen)氣(qi)(qi)體由于電(dian)(dian)(dian)(dian)(dian)暈(yun)極(ji)(ji)(ji)(ji)通(tong)人(ren)高壓直流(liu)電(dian)(dian)(dian)(dian)(dian),則在電(dian)(dian)(dian)(dian)(dian)暈(yun)極(ji)(ji)(ji)(ji)附(fu)近產生電(dian)(dian)(dian)(dian)(dian)暈(yun)現象,使氣(qi)(qi)體電(dian)(dian)(dian)(dian)(dian)離,電(dian)(dian)(dian)(dian)(dian)離后的(de)(de)(de)氣(qi)(qi)體中存在大(da)量的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)子(zi)和離子(zi),這些電(dian)(dian)(dian)(dian)(dian)子(zi)和離子(zi)與進人(ren)電(dian)(dian)(dian)(dian)(dian)場的(de)(de)(de)粉(fen)(fen)塵(chen)結合(he)起來,使塵(chen)粒(li)帶電(dian)(dian)(dian)(dian)(dian),帶電(dian)(dian)(dian)(dian)(dian)塵(chen)粒(li)在電(dian)(dian)(dian)(dian)(dian)場力的(de)(de)(de)作用下(xia)(xia)趨向本設備陽極(ji)(ji)(ji)(ji)(正極(ji)(ji)(ji)(ji)、本設備采用負高壓制)和陰(yin)極(ji)(ji)(ji)(ji)(負極(ji)(ji)(ji)(ji)) , 釋放出(chu)電(dian)(dian)(dian)(dian)(dian)子(zi)分(fen)別沉(chen)(chen)積在相應的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)上(shang),通(tong)過(guo)設備陰(yin)陽極(ji)(ji)(ji)(ji)振(zhen)打(da)系統的(de)(de)(de)振(zhen)打(da),使沉(chen)(chen)積在陰(yin)陽電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)上(shang)的(de)(de)(de)粉(fen)(fen)塵(chen)振(zhen)落,進人(ren)集灰斗 通(tong)過(guo)排灰裝(zhuang)置放出(chu),回收(shou)有物料,被)凈(jing)化的(de)(de)(de)氣(qi)(qi)體排入大(da)氣(qi)(qi)。
工作(zuo)原理
靜(jing)電(dian)除塵(chen)(chen)(chen)器的(de)(de)工作原理是利(li)用高壓電(dian)場使煙(yan)氣(qi)發生(sheng)電(dian)離,氣(qi)流(liu)中(zhong)的(de)(de)粉塵(chen)(chen)(chen)荷電(dian)在(zai)電(dian)場作用下與氣(qi)流(liu)分離。負極(ji)由不同斷面形(xing)(xing)狀的(de)(de)金屬導線制(zhi)成,叫放電(dian)電(dian)極(ji)。正極(ji)由不同幾(ji)何形(xing)(xing)狀的(de)(de)金屬板(ban)制(zhi)成,叫集塵(chen)(chen)(chen)電(dian)極(ji)。靜(jing)電(dian)除塵(chen)(chen)(chen)器的(de)(de)性能受粉塵(chen)(chen)(chen)性質(zhi)、設備(bei)構造(zao)和煙(yan)氣(qi)流(liu)速等三個因(yin)素的(de)(de)影響。粉塵(chen)(chen)(chen)的(de)(de)比(bi)電(dian)阻是評價導電(dian)性的(de)(de)指標,它對除塵(chen)(chen)(chen)效率(lv)有直接的(de)(de)影響。比(bi)電(dian)阻過低(di),塵(chen)(chen)(chen)粒難(nan)以保(bao)持在(zai)集塵(chen)(chen)(chen)電(dian)極(ji)上,致使其重返氣(qi)流(liu)。比(bi)電(dian)阻過高,到(dao)達集塵(chen)(chen)(chen)電(dian)極(ji)的(de)(de)塵(chen)(chen)(chen)粒電(dian)荷不易放出(chu),在(zai)塵(chen)(chen)(chen)層之間形(xing)(xing)成電(dian)壓梯(ti)度(du)會(hui)產生(sheng)局部擊穿和放電(dian)現象。這些情況都會(hui)造(zao)成除塵(chen)(chen)(chen)效率(lv)下降。
電除塵器的(de)基(ji)本原(yuan)理是利用電力捕(bu)集煙(yan)氣中的(de)粉(fen)塵,主要包括以(yi)下四個相互有關的(de)物理過(guo)程(cheng): (1) 氣體的(de)電離。(2) 粉(fen)塵的(de)荷電。(3) 荷電粉(fen)塵向電極移(yi)動。(4) 荷電粉(fen)塵的(de)捕(bu)集。