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。
臥式靜電(dian)(dian)除塵(chen)(chen)器是以靜電(dian)(dian)凈(jing)(jing)化法來(lai)(lai)收捕廢氣(qi)(qi)(qi)(qi)(qi)(qi)中的(de)(de)(de)(de)粉塵(chen)(chen),它的(de)(de)(de)(de)凈(jing)(jing)化工(gong)作上(shang)要是依靠電(dian)(dian)暈極(ji)(ji)和沉淀兩個系統來(lai)(lai)完成(cheng)的(de)(de)(de)(de),當含塵(chen)(chen)氣(qi)(qi)(qi)(qi)(qi)(qi)體(ti)進(jin)(jin)人(ren)(ren)氣(qi)(qi)(qi)(qi)(qi)(qi)刺叭時,含塵(chen)(chen)氣(qi)(qi)(qi)(qi)(qi)(qi)體(ti)受到氣(qi)(qi)(qi)(qi)(qi)(qi)流分布(bu)板以及折流板的(de)(de)(de)(de)調整后(hou),使(shi)(shi)氣(qi)(qi)(qi)(qi)(qi)(qi)流能(neng)較均勻地進(jin)(jin)人(ren)(ren)電(dian)(dian)場(chang)。在(zai)橫(heng)斷面擴大(da)(da)的(de)(de)(de)(de)作用下(xia),氣(qi)(qi)(qi)(qi)(qi)(qi)流速(su)度迅(xun)速(su)降低,其中有(you)些較重的(de)(de)(de)(de)塵(chen)(chen)粒便(bian)失去速(su)度而沉降下(xia)來(lai)(lai)。進(jin)(jin)人(ren)(ren)電(dian)(dian)場(chang)的(de)(de)(de)(de)含塵(chen)(chen)氣(qi)(qi)(qi)(qi)(qi)(qi)體(ti)由于(yu)電(dian)(dian)暈極(ji)(ji)通人(ren)(ren)高(gao)壓直流電(dian)(dian),則在(zai)電(dian)(dian)暈極(ji)(ji)附近產生電(dian)(dian)暈現象(xiang),使(shi)(shi)氣(qi)(qi)(qi)(qi)(qi)(qi)體(ti)電(dian)(dian)離(li),電(dian)(dian)離(li)后(hou)的(de)(de)(de)(de)氣(qi)(qi)(qi)(qi)(qi)(qi)體(ti)中存在(zai)大(da)(da)量的(de)(de)(de)(de)電(dian)(dian)子(zi)和離(li)子(zi),這些電(dian)(dian)子(zi)和離(li)子(zi)與進(jin)(jin)人(ren)(ren)電(dian)(dian)場(chang)的(de)(de)(de)(de)粉塵(chen)(chen)結合起來(lai)(lai),使(shi)(shi)塵(chen)(chen)粒帶(dai)電(dian)(dian),帶(dai)電(dian)(dian)塵(chen)(chen)粒在(zai)電(dian)(dian)場(chang)力(li)的(de)(de)(de)(de)作用下(xia)趨(qu)向本設(she)備(bei)陽極(ji)(ji)(正極(ji)(ji)、本設(she)備(bei)采用負高(gao)壓制(zhi))和陰極(ji)(ji)(負極(ji)(ji)) , 釋放出電(dian)(dian)子(zi)分別沉積在(zai)相(xiang)應(ying)的(de)(de)(de)(de)電(dian)(dian)極(ji)(ji)上(shang),通過設(she)備(bei)陰陽極(ji)(ji)振打(da)系統的(de)(de)(de)(de)振打(da),使(shi)(shi)沉積在(zai)陰陽電(dian)(dian)極(ji)(ji)上(shang)的(de)(de)(de)(de)粉塵(chen)(chen)振落,進(jin)(jin)人(ren)(ren)集灰(hui)斗 通過排(pai)灰(hui)裝置放出,回(hui)收有(you)物料(liao),被)凈(jing)(jing)化的(de)(de)(de)(de)氣(qi)(qi)(qi)(qi)(qi)(qi)體(ti)排(pai)入大(da)(da)氣(qi)(qi)(qi)(qi)(qi)(qi)。
工作原理(li)
靜(jing)電(dian)(dian)(dian)除塵(chen)(chen)(chen)器(qi)的(de)(de)(de)工作原理是(shi)利用高(gao)(gao)壓電(dian)(dian)(dian)場使(shi)煙(yan)氣(qi)發生電(dian)(dian)(dian)離,氣(qi)流(liu)中的(de)(de)(de)粉(fen)塵(chen)(chen)(chen)荷電(dian)(dian)(dian)在電(dian)(dian)(dian)場作用下與氣(qi)流(liu)分離。負極(ji)(ji)由(you)不同(tong)斷面形狀的(de)(de)(de)金屬導線制(zhi)成,叫放電(dian)(dian)(dian)電(dian)(dian)(dian)極(ji)(ji)。正極(ji)(ji)由(you)不同(tong)幾何形狀的(de)(de)(de)金屬板制(zhi)成,叫集塵(chen)(chen)(chen)電(dian)(dian)(dian)極(ji)(ji)。靜(jing)電(dian)(dian)(dian)除塵(chen)(chen)(chen)器(qi)的(de)(de)(de)性(xing)能(neng)受粉(fen)塵(chen)(chen)(chen)性(xing)質、設(she)備構造和(he)(he)煙(yan)氣(qi)流(liu)速等(deng)三個因素的(de)(de)(de)影響。粉(fen)塵(chen)(chen)(chen)的(de)(de)(de)比電(dian)(dian)(dian)阻(zu)是(shi)評(ping)價導電(dian)(dian)(dian)性(xing)的(de)(de)(de)指標(biao),它對除塵(chen)(chen)(chen)效率有直接(jie)的(de)(de)(de)影響。比電(dian)(dian)(dian)阻(zu)過(guo)低,塵(chen)(chen)(chen)粒(li)難以保持在集塵(chen)(chen)(chen)電(dian)(dian)(dian)極(ji)(ji)上,致使(shi)其重返氣(qi)流(liu)。比電(dian)(dian)(dian)阻(zu)過(guo)高(gao)(gao),到達集塵(chen)(chen)(chen)電(dian)(dian)(dian)極(ji)(ji)的(de)(de)(de)塵(chen)(chen)(chen)粒(li)電(dian)(dian)(dian)荷不易放出,在塵(chen)(chen)(chen)層之間形成電(dian)(dian)(dian)壓梯度會產生局部(bu)擊穿和(he)(he)放電(dian)(dian)(dian)現象。這些情況都會造成除塵(chen)(chen)(chen)效率下降。
電除塵(chen)器(qi)的基本原理(li)是利用(yong)電力(li)捕集煙(yan)氣中(zhong)的粉塵(chen),主要包括以下四個(ge)相(xiang)互(hu)有關(guan)的物理(li)過(guo)程: (1) 氣體的電離。(2) 粉塵(chen)的荷(he)電。(3) 荷(he)電粉塵(chen)向(xiang)電極(ji)移動。(4) 荷(he)電粉塵(chen)的捕集。