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)除塵(chen)器主(zhu)要有兩(liang)種結構形式,一(yi)種是(shi)使用耐腐蝕導(dao)電(dian)材料(可以為導(dao)電(dian)性(xing)能優良的(de)的(de)非金(jin)屬(shu)材料或(huo)具有耐腐蝕特(te)性(xing)的(de)金(jin)屬(shu)材料)做集(ji)塵(chen)極,另一(yi)種是(shi)用通過噴水或(huo)溢(yi)流水形成導(dao)電(dian)水膜,利(li)用不導(dao)電(dian)的(de)非金(jin)屬(shu)材料做集(ji)塵(chen)極。
收塵原理
濕式(shi)電(dian)(dian)(dian)除塵(chen)(chen)器(qi)和(he)與(yu)干(gan)式(shi)電(dian)(dian)(dian)除塵(chen)(chen)器(qi)的(de)(de)收塵(chen)(chen)原理相同,都是靠高壓電(dian)(dian)(dian)暈放電(dian)(dian)(dian)使(shi)得粉塵(chen)(chen)荷電(dian)(dian)(dian),荷電(dian)(dian)(dian)后(hou)的(de)(de)粉塵(chen)(chen)在電(dian)(dian)(dian)場力(li)的(de)(de)作(zuo)用下到(dao)達集塵(chen)(chen)板/管。干(gan)式(shi)電(dian)(dian)(dian)收塵(chen)(chen)器(qi)主要處(chu)理含水很低的(de)(de)干(gan)氣(qi)體,濕式(shi)電(dian)(dian)(dian)除塵(chen)(chen)器(qi)主要處(chu)理含水較高乃至(zhi)飽和(he)的(de)(de)濕氣(qi)體。在對集塵(chen)(chen)板/管上(shang)捕集到(dao)的(de)(de)粉塵(chen)(chen)清(qing)(qing)除方式(shi)上(shang)WESP與(yu)DESP有較大(da)區別,干(gan)式(shi)電(dian)(dian)(dian)除塵(chen)(chen)器(qi)一般采用機械(xie)振打或聲(sheng)波清(qing)(qing)灰等方式(shi)清(qing)(qing)除電(dian)(dian)(dian)極上(shang)的(de)(de)積灰,而濕式(shi)電(dian)(dian)(dian)除塵(chen)(chen)器(qi)則采用定期沖洗的(de)(de)方式(shi),使(shi)粉塵(chen)(chen)隨著沖刷液(ye)的(de)(de)流動而清(qing)(qing)除。