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)(dian)(dian)(dian)除(chu)塵器是以靜電(dian)(dian)(dian)(dian)(dian)凈化(hua)法(fa)來收捕廢氣(qi)(qi)中的(de)(de)(de)(de)粉(fen)(fen)塵,它的(de)(de)(de)(de)凈化(hua)工作上(shang)(shang)要(yao)是依靠(kao)電(dian)(dian)(dian)(dian)(dian)暈(yun)極(ji)(ji)(ji)和沉(chen)(chen)淀(dian)兩(liang)個系統來完成(cheng)的(de)(de)(de)(de),當(dang)含(han)(han)塵氣(qi)(qi)體進(jin)(jin)人氣(qi)(qi)刺叭時,含(han)(han)塵氣(qi)(qi)體受到氣(qi)(qi)流分(fen)布板以及折流板的(de)(de)(de)(de)調整后(hou),使(shi)(shi)氣(qi)(qi)流能(neng)較均勻地進(jin)(jin)人電(dian)(dian)(dian)(dian)(dian)場(chang)。在橫斷面擴大的(de)(de)(de)(de)作用下,氣(qi)(qi)流速度(du)迅(xun)速降(jiang)低,其中有(you)些(xie)較重的(de)(de)(de)(de)塵粒便(bian)失去速度(du)而(er)沉(chen)(chen)降(jiang)下來。進(jin)(jin)人電(dian)(dian)(dian)(dian)(dian)場(chang)的(de)(de)(de)(de)含(han)(han)塵氣(qi)(qi)體由(you)于電(dian)(dian)(dian)(dian)(dian)暈(yun)極(ji)(ji)(ji)通人高壓直流電(dian)(dian)(dian)(dian)(dian),則在電(dian)(dian)(dian)(dian)(dian)暈(yun)極(ji)(ji)(ji)附近(jin)產(chan)生電(dian)(dian)(dian)(dian)(dian)暈(yun)現象(xiang),使(shi)(shi)氣(qi)(qi)體電(dian)(dian)(dian)(dian)(dian)離(li),電(dian)(dian)(dian)(dian)(dian)離(li)后(hou)的(de)(de)(de)(de)氣(qi)(qi)體中存在大量的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)和離(li)子(zi)(zi),這些(xie)電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)和離(li)子(zi)(zi)與進(jin)(jin)人電(dian)(dian)(dian)(dian)(dian)場(chang)的(de)(de)(de)(de)粉(fen)(fen)塵結合起來,使(shi)(shi)塵粒帶電(dian)(dian)(dian)(dian)(dian),帶電(dian)(dian)(dian)(dian)(dian)塵粒在電(dian)(dian)(dian)(dian)(dian)場(chang)力的(de)(de)(de)(de)作用下趨向本設(she)(she)備陽極(ji)(ji)(ji)(正極(ji)(ji)(ji)、本設(she)(she)備采用負高壓制)和陰極(ji)(ji)(ji)(負極(ji)(ji)(ji)) , 釋放出電(dian)(dian)(dian)(dian)(dian)子(zi)(zi)分(fen)別(bie)沉(chen)(chen)積(ji)在相應的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)上(shang)(shang),通過(guo)設(she)(she)備陰陽極(ji)(ji)(ji)振打系統的(de)(de)(de)(de)振打,使(shi)(shi)沉(chen)(chen)積(ji)在陰陽電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)上(shang)(shang)的(de)(de)(de)(de)粉(fen)(fen)塵振落,進(jin)(jin)人集灰斗 通過(guo)排灰裝置放出,回(hui)收有(you)物料,被)凈化(hua)的(de)(de)(de)(de)氣(qi)(qi)體排入(ru)大氣(qi)(qi)。
工作原理
靜電(dian)(dian)(dian)除塵(chen)(chen)器的(de)(de)工作原理(li)是利用高(gao)壓電(dian)(dian)(dian)場(chang)使煙氣(qi)(qi)發生(sheng)(sheng)電(dian)(dian)(dian)離(li),氣(qi)(qi)流(liu)中的(de)(de)粉塵(chen)(chen)荷(he)電(dian)(dian)(dian)在(zai)電(dian)(dian)(dian)場(chang)作用下與氣(qi)(qi)流(liu)分離(li)。負(fu)極(ji)由不同斷(duan)面(mian)形(xing)狀的(de)(de)金屬(shu)導線制成(cheng),叫放電(dian)(dian)(dian)電(dian)(dian)(dian)極(ji)。正極(ji)由不同幾何形(xing)狀的(de)(de)金屬(shu)板(ban)制成(cheng),叫集塵(chen)(chen)電(dian)(dian)(dian)極(ji)。靜電(dian)(dian)(dian)除塵(chen)(chen)器的(de)(de)性能受(shou)粉塵(chen)(chen)性質、設備(bei)構造和煙氣(qi)(qi)流(liu)速等(deng)三(san)個因素的(de)(de)影響。粉塵(chen)(chen)的(de)(de)比(bi)電(dian)(dian)(dian)阻是評價導電(dian)(dian)(dian)性的(de)(de)指標(biao),它對(dui)除塵(chen)(chen)效率(lv)有直(zhi)接的(de)(de)影響。比(bi)電(dian)(dian)(dian)阻過低,塵(chen)(chen)粒難以(yi)保(bao)持在(zai)集塵(chen)(chen)電(dian)(dian)(dian)極(ji)上,致使其重返氣(qi)(qi)流(liu)。比(bi)電(dian)(dian)(dian)阻過高(gao),到達集塵(chen)(chen)電(dian)(dian)(dian)極(ji)的(de)(de)塵(chen)(chen)粒電(dian)(dian)(dian)荷(he)不易(yi)放出,在(zai)塵(chen)(chen)層(ceng)之間形(xing)成(cheng)電(dian)(dian)(dian)壓梯(ti)度會產生(sheng)(sheng)局(ju)部擊穿(chuan)和放電(dian)(dian)(dian)現象。這些(xie)情(qing)況都會造成(cheng)除塵(chen)(chen)效率(lv)下降。
電(dian)除塵(chen)器的基本原(yuan)理是(shi)利用電(dian)力(li)捕(bu)集煙氣中的粉塵(chen),主要包括(kuo)以下四(si)個相(xiang)互有關的物理過程: (1) 氣體的電(dian)離。(2) 粉塵(chen)的荷(he)電(dian)。(3) 荷(he)電(dian)粉塵(chen)向電(dian)極(ji)移(yi)動(dong)。(4) 荷(he)電(dian)粉塵(chen)的捕(bu)集。