濕(shi)(shi)式靜電除(chu)(chu)(chu)塵(chen)(chen)器(qi)脫除(chu)(chu)(chu)的(de)(de)(de)(de)對象是(shi)粉(fen)塵(chen)(chen)和霧滴。能克(ke)服傳統干(gan)式電除(chu)(chu)(chu)塵(chen)(chen)技術的(de)(de)(de)(de)反電暈、二次(ci)揚(yang)塵(chen)(chen)等瓶頸，具有的(de)(de)(de)(de)除(chu)(chu)(chu)塵(chen)(chen)效(xiao)率，根據經(jing)驗以(yi)及(ji)國內相關(guan)單位的(de)(de)(de)(de)試(shi)驗結果(guo)：濕(shi)(shi)式電除(chu)(chu)(chu)塵(chen)(chen)器(qi)對酸霧、有毒重金屬以(yi)及(ji)PM10，尤(you)其是(shi)PM2.5的(de)(de)(de)(de)細微粉(fen)塵(chen)(chen)有良好的(de)(de)(de)(de)脫除(chu)(chu)(chu)效(xiao)果(guo)，所以(yi)，可以(yi)使用濕(shi)(shi)式電除(chu)(chu)(chu)塵(chen)(chen)器(qi)來控制電廠的(de)(de)(de)(de)SO3酸霧、PM2.5，并且還具有聯合(he)脫除(chu)(chu)(chu)多污染(ran)物，如“汞”的(de)(de)(de)(de)效(xiao)果(guo)。

目前國內相對比較成熟的除塵技術應用情況分析，只有在脫硫塔后面布置一個濕式電除塵器方可將煙囪入口的粉塵濃度控制在5mg/m3(標態、干基、6%O2)以下。本工程確定改造方案為對原布袋除塵器進行維護、檢修、更換布袋，布袋除塵器除塵效率(lv)，在脫硫(liu)系統后面加(jia)設濕(shi)式(shi)電(dian)除塵器的形式(shi)。

濕式靜電(dian)除塵器工作原理(li)簡介：

濕(shi)式靜(jing)電(dian)(dian)(dian)(dian)(dian)(dian)除(chu)(chu)(chu)(chu)塵(chen)器(qi)是(shi)目前(qian)國內(nei)、最為(wei)的(de)除(chu)(chu)(chu)(chu)塵(chen)器(qi)。濕(shi)式電(dian)(dian)(dian)(dian)(dian)(dian)除(chu)(chu)(chu)(chu)塵(chen)器(qi)也是(shi)電(dian)(dian)(dian)(dian)(dian)(dian)除(chu)(chu)(chu)(chu)塵(chen)器(qi)的(de)一種，是(shi)直(zhi)接(jie)將(jiang)水(shui)(shui)霧(wu)(wu)(wu)噴向電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)和電(dian)(dian)(dian)(dian)(dian)(dian)暈區，水(shui)(shui)霧(wu)(wu)(wu)在(zai)芒刺(ci)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)形(xing)(xing)成的(de)電(dian)(dian)(dian)(dian)(dian)(dian)暈場(chang)內(nei)荷電(dian)(dian)(dian)(dian)(dian)(dian)后分裂進(jin)一步霧(wu)(wu)(wu)化，在(zai)這(zhe)里，電(dian)(dian)(dian)(dian)(dian)(dian)場(chang)力、荷電(dian)(dian)(dian)(dian)(dian)(dian)水(shui)(shui)霧(wu)(wu)(wu)的(de)碰撞攔截、吸附凝并(bing)，共同對粉(fen)塵(chen)粒(li)(li)子(zi)起捕(bu)集作用，最終粉(fen)塵(chen)粒(li)(li)子(zi)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)場(chang)力的(de)驅動下(xia)到達集塵(chen)極(ji)(ji)而被(bei)捕(bu)集；與干式電(dian)(dian)(dian)(dian)(dian)(dian)除(chu)(chu)(chu)(chu)塵(chen)器(qi)通過振(zhen)打(da)將(jiang)極(ji)(ji)板上的(de)灰振(zhen)落至(zhi)(zhi)灰斗不同的(de)是(shi)：濕(shi)式電(dian)(dian)(dian)(dian)(dian)(dian)除(chu)(chu)(chu)(chu)塵(chen)器(qi)則(ze)是(shi)將(jiang)水(shui)(shui)噴至(zhi)(zhi)集塵(chen)極(ji)(ji)上形(xing)(xing)成連續的(de)水(shui)(shui)膜(mo)，采用水(shui)(shui)清(qing)灰，無振(zhen)打(da)裝置，流(liu)動水(shui)(shui)膜(mo)將(jiang)捕(bu)獲的(de)粉(fen)塵(chen)沖刷到灰斗中隨(sui)水(shui)(shui)排出。

鍋爐濕式靜電除塵器的(de)排放指(zhi)標：

濕(shi)式電除塵器(qi)出口煙(yan)塵(塵+石膏(gao))排放濃度：≤5mg/m3；

出口液滴(di)排放濃度：<5mg/m3；

液(ye)滴脫除(chu)效率不(bu)低于75%；

除塵效率：≥75%；

PM2.5脫除效率(lv)：≥70%；

SO3脫除效(xiao)率(lv)：≥70%；

濕(shi)式電除塵器本體(不(bu)包括煙道)阻力(li)：<300Pa；

漏風率：≤1%；使用壽命30年。