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)塵器(qi)主要有兩種(zhong)結(jie)構形(xing)式,一種(zhong)是使用(yong)耐腐蝕(shi)導(dao)(dao)電(dian)材料(liao)(liao)(可以為導(dao)(dao)電(dian)性能(neng)優良的(de)的(de)非金(jin)屬(shu)(shu)材料(liao)(liao)或具有耐腐蝕(shi)特(te)性的(de)金(jin)屬(shu)(shu)材料(liao)(liao))做集塵極,另(ling)一種(zhong)是用(yong)通過噴水(shui)或溢流水(shui)形(xing)成導(dao)(dao)電(dian)水(shui)膜,利用(yong)不導(dao)(dao)電(dian)的(de)非金(jin)屬(shu)(shu)材料(liao)(liao)做集塵極。
收塵原理
濕(shi)式(shi)(shi)電(dian)(dian)除(chu)(chu)(chu)塵(chen)器(qi)和(he)(he)與干(gan)式(shi)(shi)電(dian)(dian)除(chu)(chu)(chu)塵(chen)器(qi)的(de)收塵(chen)原理(li)相同,都是(shi)靠高(gao)(gao)壓(ya)電(dian)(dian)暈放電(dian)(dian)使(shi)得粉塵(chen)荷電(dian)(dian),荷電(dian)(dian)后的(de)粉塵(chen)在電(dian)(dian)場力的(de)作用(yong)下到達(da)集(ji)塵(chen)板/管。干(gan)式(shi)(shi)電(dian)(dian)收塵(chen)器(qi)主要處(chu)理(li)含水(shui)很(hen)低的(de)干(gan)氣體,濕(shi)式(shi)(shi)電(dian)(dian)除(chu)(chu)(chu)塵(chen)器(qi)主要處(chu)理(li)含水(shui)較高(gao)(gao)乃(nai)至飽和(he)(he)的(de)濕(shi)氣體。在對集(ji)塵(chen)板/管上捕集(ji)到的(de)粉塵(chen)清(qing)(qing)(qing)除(chu)(chu)(chu)方式(shi)(shi)上WESP與DESP有較大(da)區別(bie),干(gan)式(shi)(shi)電(dian)(dian)除(chu)(chu)(chu)塵(chen)器(qi)一般采用(yong)機械振打或聲波清(qing)(qing)(qing)灰等方式(shi)(shi)清(qing)(qing)(qing)除(chu)(chu)(chu)電(dian)(dian)極(ji)上的(de)積灰,而(er)濕(shi)式(shi)(shi)電(dian)(dian)除(chu)(chu)(chu)塵(chen)器(qi)則采用(yong)定(ding)期沖(chong)洗的(de)方式(shi)(shi),使(shi)粉塵(chen)隨著沖(chong)刷(shua)液的(de)流(liu)動而(er)清(qing)(qing)(qing)除(chu)(chu)(chu)。