濕式電除塵器是一種用來處理含微量粉塵和微顆粒的新除塵設備,主要用來除去含濕氣體中的塵、酸霧、水滴、氣溶膠、臭味、PM2.5等有害物質,是治理大氣粉塵污染的理想設備。
濕式電除塵器通常簡稱WESP,與干式電除塵器的除塵基本原理相同,要經歷荷電、收集和清灰三個階段。
濕式電除塵(chen)器主要有兩種(zhong)結構形式,一種(zhong)是使用耐腐(fu)蝕(shi)導(dao)(dao)(dao)電材料(liao)(可以(yi)為導(dao)(dao)(dao)電性能優良的(de)(de)的(de)(de)非金(jin)屬材料(liao)或具有耐腐(fu)蝕(shi)特性的(de)(de)金(jin)屬材料(liao))做集塵(chen)極(ji),另一種(zhong)是用通過噴水(shui)或溢流水(shui)形成導(dao)(dao)(dao)電水(shui)膜,利用不(bu)導(dao)(dao)(dao)電的(de)(de)非金(jin)屬材料(liao)做集塵(chen)極(ji)。
收塵(chen)原理
濕式(shi)(shi)電(dian)(dian)(dian)除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)器和與(yu)干(gan)式(shi)(shi)電(dian)(dian)(dian)除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)器的(de)(de)收(shou)塵(chen)(chen)(chen)(chen)原理相同,都(dou)是靠高壓電(dian)(dian)(dian)暈放電(dian)(dian)(dian)使(shi)得粉(fen)(fen)塵(chen)(chen)(chen)(chen)荷電(dian)(dian)(dian),荷電(dian)(dian)(dian)后的(de)(de)粉(fen)(fen)塵(chen)(chen)(chen)(chen)在(zai)電(dian)(dian)(dian)場力的(de)(de)作用下到(dao)達集塵(chen)(chen)(chen)(chen)板/管(guan)。干(gan)式(shi)(shi)電(dian)(dian)(dian)收(shou)塵(chen)(chen)(chen)(chen)器主要處(chu)理含(han)水(shui)很(hen)低(di)的(de)(de)干(gan)氣(qi)體,濕式(shi)(shi)電(dian)(dian)(dian)除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)器主要處(chu)理含(han)水(shui)較高乃至(zhi)飽和的(de)(de)濕氣(qi)體。在(zai)對集塵(chen)(chen)(chen)(chen)板/管(guan)上捕(bu)集到(dao)的(de)(de)粉(fen)(fen)塵(chen)(chen)(chen)(chen)清(qing)除(chu)(chu)(chu)方(fang)式(shi)(shi)上WESP與(yu)DESP有較大區別,干(gan)式(shi)(shi)電(dian)(dian)(dian)除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)器一般采用機(ji)械(xie)振打或聲波(bo)清(qing)灰(hui)等方(fang)式(shi)(shi)清(qing)除(chu)(chu)(chu)電(dian)(dian)(dian)極(ji)上的(de)(de)積灰(hui),而濕式(shi)(shi)電(dian)(dian)(dian)除(chu)(chu)(chu)塵(chen)(chen)(chen)(chen)器則采用定(ding)期(qi)沖洗(xi)的(de)(de)方(fang)式(shi)(shi),使(shi)粉(fen)(fen)塵(chen)(chen)(chen)(chen)隨(sui)著沖刷(shua)液(ye)的(de)(de)流動而清(qing)除(chu)(chu)(chu)。