臥式靜電除塵器是眾多除塵器當中的一種,臥式靜電除塵器是以靜電凈化法來收捕廢氣中的粉塵的設備,其主要是讓含塵氣體進人氣刺叭時,含塵氣體受到氣流分布板以及折流板的調整后,使氣流能較均勻地進人電場。
臥式(shi)靜(jing)電(dian)(dian)除塵(chen)(chen)器是以(yi)靜(jing)電(dian)(dian)凈(jing)化法來(lai)收捕廢氣(qi)(qi)(qi)中的(de)粉(fen)塵(chen)(chen),它的(de)凈(jing)化工作(zuo)上要是依(yi)靠電(dian)(dian)暈(yun)極(ji)(ji)(ji)和(he)沉淀兩(liang)個系(xi)(xi)統(tong)來(lai)完(wan)成的(de),當含塵(chen)(chen)氣(qi)(qi)(qi)體(ti)(ti)進(jin)人氣(qi)(qi)(qi)刺(ci)叭時(shi),含塵(chen)(chen)氣(qi)(qi)(qi)體(ti)(ti)受(shou)到氣(qi)(qi)(qi)流(liu)(liu)分(fen)布板(ban)以(yi)及(ji)折(zhe)流(liu)(liu)板(ban)的(de)調整后,使氣(qi)(qi)(qi)流(liu)(liu)能較均勻地進(jin)人電(dian)(dian)場。在(zai)橫斷(duan)面擴大(da)(da)的(de)作(zuo)用(yong)下(xia),氣(qi)(qi)(qi)流(liu)(liu)速(su)度迅(xun)速(su)降低,其中有些較重的(de)塵(chen)(chen)粒(li)便(bian)失去速(su)度而沉降下(xia)來(lai)。進(jin)人電(dian)(dian)場的(de)含塵(chen)(chen)氣(qi)(qi)(qi)體(ti)(ti)由于電(dian)(dian)暈(yun)極(ji)(ji)(ji)通人高壓直(zhi)流(liu)(liu)電(dian)(dian),則在(zai)電(dian)(dian)暈(yun)極(ji)(ji)(ji)附近(jin)產生電(dian)(dian)暈(yun)現象,使氣(qi)(qi)(qi)體(ti)(ti)電(dian)(dian)離,電(dian)(dian)離后的(de)氣(qi)(qi)(qi)體(ti)(ti)中存在(zai)大(da)(da)量的(de)電(dian)(dian)子(zi)(zi)(zi)(zi)和(he)離子(zi)(zi)(zi)(zi),這(zhe)些電(dian)(dian)子(zi)(zi)(zi)(zi)和(he)離子(zi)(zi)(zi)(zi)與(yu)進(jin)人電(dian)(dian)場的(de)粉(fen)塵(chen)(chen)結(jie)合起來(lai),使塵(chen)(chen)粒(li)帶電(dian)(dian),帶電(dian)(dian)塵(chen)(chen)粒(li)在(zai)電(dian)(dian)場力的(de)作(zuo)用(yong)下(xia)趨(qu)向本設備(bei)(bei)陽極(ji)(ji)(ji)(正(zheng)極(ji)(ji)(ji)、本設備(bei)(bei)采用(yong)負高壓制)和(he)陰(yin)極(ji)(ji)(ji)(負極(ji)(ji)(ji)) , 釋放(fang)出(chu)電(dian)(dian)子(zi)(zi)(zi)(zi)分(fen)別沉積(ji)在(zai)相應的(de)電(dian)(dian)極(ji)(ji)(ji)上,通過(guo)設備(bei)(bei)陰(yin)陽極(ji)(ji)(ji)振(zhen)打系(xi)(xi)統(tong)的(de)振(zhen)打,使沉積(ji)在(zai)陰(yin)陽電(dian)(dian)極(ji)(ji)(ji)上的(de)粉(fen)塵(chen)(chen)振(zhen)落,進(jin)人集灰斗(dou) 通過(guo)排灰裝置(zhi)放(fang)出(chu),回收有物(wu)料,被)凈(jing)化的(de)氣(qi)(qi)(qi)體(ti)(ti)排入大(da)(da)氣(qi)(qi)(qi)。
工作原理(li)
靜電(dian)(dian)(dian)除(chu)塵(chen)器(qi)的(de)(de)工作原(yuan)理是(shi)利用高(gao)壓電(dian)(dian)(dian)場(chang)使(shi)煙氣發生(sheng)電(dian)(dian)(dian)離(li),氣流(liu)中的(de)(de)粉(fen)塵(chen)荷(he)電(dian)(dian)(dian)在(zai)電(dian)(dian)(dian)場(chang)作用下與氣流(liu)分(fen)離(li)。負極(ji)由(you)不同(tong)斷(duan)面形(xing)狀的(de)(de)金屬(shu)導(dao)(dao)線制成,叫放電(dian)(dian)(dian)電(dian)(dian)(dian)極(ji)。正(zheng)極(ji)由(you)不同(tong)幾何形(xing)狀的(de)(de)金屬(shu)板制成,叫集塵(chen)電(dian)(dian)(dian)極(ji)。靜電(dian)(dian)(dian)除(chu)塵(chen)器(qi)的(de)(de)性(xing)(xing)能受(shou)粉(fen)塵(chen)性(xing)(xing)質、設備構造和煙氣流(liu)速等三個因素的(de)(de)影響(xiang)。粉(fen)塵(chen)的(de)(de)比(bi)(bi)(bi)電(dian)(dian)(dian)阻是(shi)評價導(dao)(dao)電(dian)(dian)(dian)性(xing)(xing)的(de)(de)指標,它(ta)對除(chu)塵(chen)效(xiao)率(lv)有(you)直接的(de)(de)影響(xiang)。比(bi)(bi)(bi)電(dian)(dian)(dian)阻過(guo)低(di),塵(chen)粒難以(yi)保持在(zai)集塵(chen)電(dian)(dian)(dian)極(ji)上,致使(shi)其重返(fan)氣流(liu)。比(bi)(bi)(bi)電(dian)(dian)(dian)阻過(guo)高(gao),到(dao)達集塵(chen)電(dian)(dian)(dian)極(ji)的(de)(de)塵(chen)粒電(dian)(dian)(dian)荷(he)不易放出(chu),在(zai)塵(chen)層之間形(xing)成電(dian)(dian)(dian)壓梯度會(hui)(hui)產生(sheng)局部(bu)擊穿和放電(dian)(dian)(dian)現象。這些情況都會(hui)(hui)造成除(chu)塵(chen)效(xiao)率(lv)下降。
電(dian)除塵(chen)器的基(ji)本(ben)原理(li)是利用電(dian)力捕集煙氣中(zhong)的粉塵(chen),主(zhu)要包括以(yi)下四個相互有關(guan)的物理(li)過程: (1) 氣體(ti)的電(dian)離(li)。(2) 粉塵(chen)的荷(he)電(dian)。(3) 荷(he)電(dian)粉塵(chen)向電(dian)極移動。(4) 荷(he)電(dian)粉塵(chen)的捕集。