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(shi)式(shi)電(dian)(dian)除塵器主要有兩種(zhong)結構形(xing)式(shi),一種(zhong)是使用(yong)耐(nai)腐蝕(shi)導(dao)電(dian)(dian)材料(liao)(可以為(wei)導(dao)電(dian)(dian)性(xing)能優良的(de)的(de)非金(jin)屬(shu)(shu)材料(liao)或(huo)具有耐(nai)腐蝕(shi)特性(xing)的(de)金(jin)屬(shu)(shu)材料(liao))做(zuo)集塵極(ji),另(ling)一種(zhong)是用(yong)通過噴水或(huo)溢流(liu)水形(xing)成導(dao)電(dian)(dian)水膜,利用(yong)不(bu)導(dao)電(dian)(dian)的(de)非金(jin)屬(shu)(shu)材料(liao)做(zuo)集塵極(ji)。
收塵原理
濕(shi)式(shi)電(dian)(dian)除塵(chen)(chen)(chen)器(qi)和(he)與干式(shi)電(dian)(dian)除塵(chen)(chen)(chen)器(qi)的(de)(de)(de)收(shou)(shou)塵(chen)(chen)(chen)原理(li)相同,都是靠高壓(ya)電(dian)(dian)暈放電(dian)(dian)使得粉塵(chen)(chen)(chen)荷電(dian)(dian),荷電(dian)(dian)后的(de)(de)(de)粉塵(chen)(chen)(chen)在電(dian)(dian)場力的(de)(de)(de)作用(yong)下到達集(ji)塵(chen)(chen)(chen)板/管。干式(shi)電(dian)(dian)收(shou)(shou)塵(chen)(chen)(chen)器(qi)主要處(chu)理(li)含水(shui)很低的(de)(de)(de)干氣體,濕(shi)式(shi)電(dian)(dian)除塵(chen)(chen)(chen)器(qi)主要處(chu)理(li)含水(shui)較(jiao)高乃(nai)至飽和(he)的(de)(de)(de)濕(shi)氣體。在對(dui)集(ji)塵(chen)(chen)(chen)板/管上捕(bu)集(ji)到的(de)(de)(de)粉塵(chen)(chen)(chen)清(qing)(qing)除方式(shi)上WESP與DESP有(you)較(jiao)大區別,干式(shi)電(dian)(dian)除塵(chen)(chen)(chen)器(qi)一(yi)般采用(yong)機械振打或(huo)聲波(bo)清(qing)(qing)灰等(deng)方式(shi)清(qing)(qing)除電(dian)(dian)極上的(de)(de)(de)積(ji)灰,而濕(shi)式(shi)電(dian)(dian)除塵(chen)(chen)(chen)器(qi)則采用(yong)定期沖洗的(de)(de)(de)方式(shi),使粉塵(chen)(chen)(chen)隨著沖刷液的(de)(de)(de)流動而清(qing)(qing)除。