濕式靜電除塵器,濕式電除塵器生產廠家,濕式靜電除塵器廠家

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漢中濕式靜電除塵器生產廠家

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漢中濕式靜電除塵器生產廠家

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靜電除塵器

電除塵器的工作原理是利用高壓電場使煙氣發生電離,氣流中的粉塵荷電在電場作用下與氣流分離。負極由不同斷面形狀的金屬導線制成,叫放電電極。正極由不同幾何形狀的金屬板制成,叫集塵電極。靜電除塵器的性能受粉塵性質、設備構造和煙氣流速等三個因素的影響。粉塵的比電阻是評價導電性的指標,它對除塵效率有直接的影響。

比電(dian)(dian)(dian)阻(zu)過(guo)低,塵粒難以保持在集(ji)塵電(dian)(dian)(dian)極上(shang),致使其重返氣流。比電(dian)(dian)(dian)阻(zu)過(guo)高(gao),到達集(ji)塵電(dian)(dian)(dian)極的塵粒電(dian)(dian)(dian)荷不易放出,在塵層之間形成電(dian)(dian)(dian)壓梯度會產生局部擊穿和放電(dian)(dian)(dian)現象(xiang)。

這些(xie)情況都(dou)會造成除塵(chen)(chen)(chen)效率下降。工(gong)作(zuo)原理/靜電(dian)(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)器(qi)用(yong)強電(dian)(dian)(dian)(dian)(dian)(dian)(dian)場使灰塵(chen)(chen)(chen)顆粒(li)帶電(dian)(dian)(dian)(dian)(dian)(dian)(dian),在其(qi)通過除塵(chen)(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)時,帶正(zheng)/負(fu)(fu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)荷的微(wei)粒(li)分(fen)別被負(fu)(fu)/正(zheng)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)板吸附,即達到除塵(chen)(chen)(chen)目的.由于輻射摩擦等(deng)原因,空(kong)氣中(zhong)含有少量的自由離(li)(li)子,單靠這些(xie)自由離(li)(li)子是不可能使含塵(chen)(chen)(chen)空(kong)氣中(zhong)的塵(chen)(chen)(chen)粒(li)充分(fen)荷電(dian)(dian)(dian)(dian)(dian)(dian)(dian)的。因此,要利用(yong)靜電(dian)(dian)(dian)(dian)(dian)(dian)(dian)使粉塵(chen)(chen)(chen)分(fen)離(li)(li)須(xu)具備(bei)兩個基本條件,一(yi)是存在使粉塵(chen)(chen)(chen)荷電(dian)(dian)(dian)(dian)(dian)(dian)(dian)的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)場;二是存在使荷電(dian)(dian)(dian)(dian)(dian)(dian)(dian)粉塵(chen)(chen)(chen)顆粒(li)分(fen)離(li)(li)的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)場。一(yi)般的靜電(dian)(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)器(qi)采(cai)(cai)用(yong)荷電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)場和分(fen)離(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)場合一(yi)的方法,放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)的金屬棒接(jie)高壓直流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源的負(fu)(fu)極(ji)(ji)(ji),集塵(chen)(chen)(chen)極(ji)(ji)(ji)接(jie)地為正(zheng)極(ji)(ji)(ji),集塵(chen)(chen)(chen)極(ji)(ji)(ji)可以采(cai)(cai)用(yong)圓管,也可以采(cai)(cai)用(yong)平板。

接通電源后,在電場作用下,空氣中的自由離子要向兩極移動,電壓愈高、電場強度愈高,離子的運動速度愈快。濕式靜電除塵器生產廠家由于離子的運動,極間形成了電流。開始時,空氣中的自由離子少,電流較少。

電壓升高到數值后(hou),放(fang)電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)附(fu)近的(de)(de)(de)離(li)(li)(li)子(zi)(zi)獲得了(le)較高(gao)的(de)(de)(de)能量和速度,它(ta)們撞擊空氣(qi)中(zhong)(zhong)的(de)(de)(de)中(zhong)(zhong)性原子(zi)(zi)時(shi),中(zhong)(zhong)性原子(zi)(zi)會分解成(cheng)正、負離(li)(li)(li)子(zi)(zi),這種現象稱(cheng)為空氣(qi)電(dian)(dian)(dian)(dian)離(li)(li)(li)。空氣(qi)電(dian)(dian)(dian)(dian)離(li)(li)(li)后(hou),由于聯鎖反應,在極(ji)(ji)(ji)間(jian)(jian)運(yun)動的(de)(de)(de)離(li)(li)(li)子(zi)(zi)數大大增加,表(biao)現為極(ji)(ji)(ji)間(jian)(jian)的(de)(de)(de)電(dian)(dian)(dian)(dian)流急劇(ju)增加,空氣(qi)成(cheng)了(le)導體。放(fang)電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)周(zhou)圍(wei)(wei)的(de)(de)(de)空氣(qi)全部(bu)電(dian)(dian)(dian)(dian)離(li)(li)(li)后(hou),在放(fang)電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)周(zhou)圍(wei)(wei)可以(yi)看見一圈淡藍色的(de)(de)(de)光環(huan),這個光環(huan)稱(cheng)為電(dian)(dian)(dian)(dian)暈(yun)。電(dian)(dian)(dian)(dian)除塵器的(de)(de)(de)電(dian)(dian)(dian)(dian)暈(yun)范圍(wei)(wei)通常局限于金(jin)屬棒周(zhou)圍(wei)(wei)幾毫米處。

空氣在(zai)電(dian)暈(yun)范圍電(dian)離后(hou),正離子(zi)(zi)很(hen)(hen)快向負極移動,只有負離子(zi)(zi)才會進入電(dian)暈(yun)外(wai)區(qu),向陽極移動。含塵(chen)空氣通過(guo)電(dian)除塵(chen)器時,由于電(dian)暈(yun)區(qu)的(de)范圍很(hen)(hen)小,只有少量的(de)塵(chen)粒在(zai)電(dian)暈(yun)區(qu)通過(guo),獲得(de)正電(dian)荷,沉(chen)積在(zai)電(dian)暈(yun)極上(shang)。

大多(duo)數塵粒在電(dian)暈外(wai)區通過,獲得負電(dian)荷,沉積在(zai)陽極(ji)板上,當塵(chen)埃聚集到(dao)程度,由于重力作用,掉下聚集到收集槽內。靜電除塵器與其他除塵設備相比,耗能少,除塵效率高,適用于除去煙氣中0.01—50μm的粉塵,而且可用于煙氣溫度高、壓力大的場合。實踐表明,處理的煙氣量越大,使用靜電除塵器的投資和運行費用越經濟。

濕式靜電除塵器生產廠家

相關標簽:濕式靜電除塵器,濕式靜電除塵器生產廠家價格,濕式靜電除塵器生產廠家批發

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