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(dian)除(chu)塵(chen)器(qi)主要有兩種結構形式,一(yi)種是使(shi)用(yong)耐腐蝕(shi)導(dao)電(dian)材料(liao)(可以為(wei)導(dao)電(dian)性能(neng)優(you)良(liang)的(de)的(de)非(fei)金屬(shu)材料(liao)或(huo)具有耐腐蝕(shi)特性的(de)金屬(shu)材料(liao))做集塵(chen)極(ji),另一(yi)種是用(yong)通過(guo)噴水或(huo)溢流水形成(cheng)導(dao)電(dian)水膜,利用(yong)不導(dao)電(dian)的(de)非(fei)金屬(shu)材料(liao)做集塵(chen)極(ji)。
收塵原理
濕式(shi)(shi)(shi)電(dian)(dian)除(chu)(chu)塵(chen)(chen)器和與干(gan)(gan)式(shi)(shi)(shi)電(dian)(dian)除(chu)(chu)塵(chen)(chen)器的收塵(chen)(chen)原理(li)(li)相(xiang)同,都是靠高壓電(dian)(dian)暈放電(dian)(dian)使得粉(fen)塵(chen)(chen)荷(he)電(dian)(dian),荷(he)電(dian)(dian)后的粉(fen)塵(chen)(chen)在電(dian)(dian)場力(li)的作用下到(dao)達(da)集塵(chen)(chen)板(ban)/管。干(gan)(gan)式(shi)(shi)(shi)電(dian)(dian)收塵(chen)(chen)器主要(yao)(yao)處理(li)(li)含水(shui)很低的干(gan)(gan)氣體(ti),濕式(shi)(shi)(shi)電(dian)(dian)除(chu)(chu)塵(chen)(chen)器主要(yao)(yao)處理(li)(li)含水(shui)較高乃至(zhi)飽和的濕氣體(ti)。在對集塵(chen)(chen)板(ban)/管上(shang)(shang)捕(bu)集到(dao)的粉(fen)塵(chen)(chen)清(qing)除(chu)(chu)方(fang)式(shi)(shi)(shi)上(shang)(shang)WESP與DESP有較大(da)區別(bie),干(gan)(gan)式(shi)(shi)(shi)電(dian)(dian)除(chu)(chu)塵(chen)(chen)器一般采用機械振打(da)或(huo)聲波清(qing)灰(hui)(hui)等方(fang)式(shi)(shi)(shi)清(qing)除(chu)(chu)電(dian)(dian)極上(shang)(shang)的積灰(hui)(hui),而(er)濕式(shi)(shi)(shi)電(dian)(dian)除(chu)(chu)塵(chen)(chen)器則采用定期沖(chong)洗的方(fang)式(shi)(shi)(shi),使粉(fen)塵(chen)(chen)隨著沖(chong)刷液的流(liu)動而(er)清(qing)除(chu)(chu)。