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(shi)電除塵(chen)器主要有兩種結(jie)構形式(shi),一種是(shi)使用(yong)耐腐(fu)(fu)蝕(shi)導電材料(可以為(wei)導電性能優良的(de)的(de)非(fei)金(jin)屬材料或具有耐腐(fu)(fu)蝕(shi)特性的(de)金(jin)屬材料)做(zuo)集(ji)塵(chen)極,另一種是(shi)用(yong)通過噴水(shui)(shui)或溢流水(shui)(shui)形成導電水(shui)(shui)膜,利用(yong)不導電的(de)非(fei)金(jin)屬材料做(zuo)集(ji)塵(chen)極。
收塵原理
濕(shi)式(shi)(shi)電(dian)(dian)(dian)除(chu)(chu)塵(chen)(chen)器(qi)(qi)和(he)與干式(shi)(shi)電(dian)(dian)(dian)除(chu)(chu)塵(chen)(chen)器(qi)(qi)的(de)收(shou)塵(chen)(chen)原理(li)相同,都是靠高壓電(dian)(dian)(dian)暈放電(dian)(dian)(dian)使得(de)粉塵(chen)(chen)荷電(dian)(dian)(dian),荷電(dian)(dian)(dian)后的(de)粉塵(chen)(chen)在電(dian)(dian)(dian)場(chang)力的(de)作用下到達集塵(chen)(chen)板/管。干式(shi)(shi)電(dian)(dian)(dian)收(shou)塵(chen)(chen)器(qi)(qi)主(zhu)(zhu)要處理(li)含水(shui)(shui)很低的(de)干氣體(ti),濕(shi)式(shi)(shi)電(dian)(dian)(dian)除(chu)(chu)塵(chen)(chen)器(qi)(qi)主(zhu)(zhu)要處理(li)含水(shui)(shui)較(jiao)高乃至飽(bao)和(he)的(de)濕(shi)氣體(ti)。在對集塵(chen)(chen)板/管上捕集到的(de)粉塵(chen)(chen)清(qing)除(chu)(chu)方式(shi)(shi)上WESP與DESP有較(jiao)大(da)區別,干式(shi)(shi)電(dian)(dian)(dian)除(chu)(chu)塵(chen)(chen)器(qi)(qi)一般采(cai)用機械(xie)振打或(huo)聲波清(qing)灰(hui)等方式(shi)(shi)清(qing)除(chu)(chu)電(dian)(dian)(dian)極上的(de)積(ji)灰(hui),而濕(shi)式(shi)(shi)電(dian)(dian)(dian)除(chu)(chu)塵(chen)(chen)器(qi)(qi)則采(cai)用定期(qi)沖(chong)洗的(de)方式(shi)(shi),使粉塵(chen)(chen)隨(sui)著沖(chong)刷液的(de)流(liu)動而清(qing)除(chu)(chu)。