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)(chen)器(qi)主(zhu)要有(you)兩種結構形式,一種是使用(yong)耐腐(fu)蝕(shi)導(dao)電材(cai)(cai)料(可以(yi)為導(dao)電性能優良的的非(fei)金屬(shu)材(cai)(cai)料或具有(you)耐腐(fu)蝕(shi)特(te)性的金屬(shu)材(cai)(cai)料)做集(ji)塵(chen)(chen)極,另一種是用(yong)通過噴水(shui)(shui)或溢流水(shui)(shui)形成導(dao)電水(shui)(shui)膜(mo),利用(yong)不導(dao)電的非(fei)金屬(shu)材(cai)(cai)料做集(ji)塵(chen)(chen)極。
收塵原理(li)
濕(shi)(shi)式(shi)(shi)(shi)電(dian)除(chu)塵(chen)(chen)(chen)(chen)(chen)器(qi)(qi)和與干(gan)(gan)式(shi)(shi)(shi)電(dian)除(chu)塵(chen)(chen)(chen)(chen)(chen)器(qi)(qi)的(de)收塵(chen)(chen)(chen)(chen)(chen)原理(li)相同,都是靠高壓電(dian)暈放電(dian)使(shi)得粉(fen)塵(chen)(chen)(chen)(chen)(chen)荷電(dian),荷電(dian)后(hou)的(de)粉(fen)塵(chen)(chen)(chen)(chen)(chen)在電(dian)場力的(de)作用下(xia)到(dao)達集塵(chen)(chen)(chen)(chen)(chen)板(ban)(ban)/管。干(gan)(gan)式(shi)(shi)(shi)電(dian)收塵(chen)(chen)(chen)(chen)(chen)器(qi)(qi)主要(yao)處(chu)理(li)含水很低(di)的(de)干(gan)(gan)氣體(ti),濕(shi)(shi)式(shi)(shi)(shi)電(dian)除(chu)塵(chen)(chen)(chen)(chen)(chen)器(qi)(qi)主要(yao)處(chu)理(li)含水較高乃(nai)至飽和的(de)濕(shi)(shi)氣體(ti)。在對(dui)集塵(chen)(chen)(chen)(chen)(chen)板(ban)(ban)/管上(shang)捕集到(dao)的(de)粉(fen)塵(chen)(chen)(chen)(chen)(chen)清(qing)除(chu)方(fang)(fang)式(shi)(shi)(shi)上(shang)WESP與DESP有較大(da)區別,干(gan)(gan)式(shi)(shi)(shi)電(dian)除(chu)塵(chen)(chen)(chen)(chen)(chen)器(qi)(qi)一般采(cai)用機械振打或(huo)聲波清(qing)灰(hui)等方(fang)(fang)式(shi)(shi)(shi)清(qing)除(chu)電(dian)極上(shang)的(de)積(ji)灰(hui),而濕(shi)(shi)式(shi)(shi)(shi)電(dian)除(chu)塵(chen)(chen)(chen)(chen)(chen)器(qi)(qi)則采(cai)用定期(qi)沖洗的(de)方(fang)(fang)式(shi)(shi)(shi),使(shi)粉(fen)塵(chen)(chen)(chen)(chen)(chen)隨著沖刷液的(de)流動(dong)而清(qing)除(chu)。