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伊春濕式靜電除塵器生產廠家

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伊春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)阻過低(di),塵(chen)粒難以保持在集(ji)塵(chen)電(dian)極上,致使其重返氣(qi)流。比電(dian)阻過高,到達集(ji)塵(chen)電(dian)極的塵(chen)粒電(dian)荷不易放(fang)出,在塵(chen)層之(zhi)間形成電(dian)壓梯度(du)會(hui)產生局部擊穿和放(fang)電(dian)現象。

這些情況都(dou)會造成除塵(chen)(chen)效率下(xia)降。工(gong)作原(yuan)理(li)/靜電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)器用(yong)強電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)使(shi)灰(hui)塵(chen)(chen)顆(ke)粒帶電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian),在其(qi)通過除塵(chen)(chen)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)時,帶正(zheng)/負(fu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)荷(he)(he)的(de)(de)微粒分(fen)別被(bei)負(fu)/正(zheng)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)板(ban)吸附,即達到(dao)除塵(chen)(chen)目的(de)(de).由(you)于(yu)輻(fu)射摩擦等原(yuan)因,空氣中(zhong)(zhong)含有少量的(de)(de)自由(you)離(li)子(zi),單靠這些自由(you)離(li)子(zi)是(shi)不可能使(shi)含塵(chen)(chen)空氣中(zhong)(zhong)的(de)(de)塵(chen)(chen)粒充分(fen)荷(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)。因此,要利(li)用(yong)靜電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)使(shi)粉塵(chen)(chen)分(fen)離(li)須具備兩個(ge)基本條件,一(yi)是(shi)存(cun)在使(shi)粉塵(chen)(chen)荷(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang);二是(shi)存(cun)在使(shi)荷(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)粉塵(chen)(chen)顆(ke)粒分(fen)離(li)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)。一(yi)般(ban)的(de)(de)靜電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)除塵(chen)(chen)器采用(yong)荷(he)(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)和分(fen)離(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場(chang)(chang)合一(yi)的(de)(de)方法(fa),放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)的(de)(de)金屬棒接高壓直流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源的(de)(de)負(fu)極(ji)(ji)(ji),集塵(chen)(chen)極(ji)(ji)(ji)接地為正(zheng)極(ji)(ji)(ji),集塵(chen)(chen)極(ji)(ji)(ji)可以采用(yong)圓管,也(ye)可以采用(yong)平板(ban)。

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(ya)升(sheng)高到數值(zhi)后,放電(dian)(dian)極附近的(de)(de)離子獲(huo)得了較高的(de)(de)能(neng)量(liang)和速度(du),它們撞擊空(kong)氣中(zhong)的(de)(de)中(zhong)性原子時(shi),中(zhong)性原子會分解成正、負(fu)離子,這(zhe)種現(xian)象稱(cheng)為(wei)空(kong)氣電(dian)(dian)離。空(kong)氣電(dian)(dian)離后,由于(yu)聯鎖反應,在極間運動的(de)(de)離子數大大增加,表現(xian)為(wei)極間的(de)(de)電(dian)(dian)流(liu)急劇增加,空(kong)氣成了導體。放電(dian)(dian)極周(zhou)圍(wei)(wei)的(de)(de)空(kong)氣全部電(dian)(dian)離后,在放電(dian)(dian)極周(zhou)圍(wei)(wei)可以(yi)看見一圈淡(dan)藍色的(de)(de)光(guang)環(huan),這(zhe)個光(guang)環(huan)稱(cheng)為(wei)電(dian)(dian)暈。電(dian)(dian)除塵器的(de)(de)電(dian)(dian)暈范圍(wei)(wei)通常(chang)局(ju)限于(yu)金屬棒周(zhou)圍(wei)(wei)幾(ji)毫米處。

空氣在電暈范(fan)圍(wei)電離后,正離子(zi)很快向負極(ji)移(yi)動,只有負離子(zi)才會進入電暈外區(qu),向陽極(ji)移(yi)動。含塵(chen)空氣通過電除塵(chen)器時(shi),由于電暈區(qu)的(de)范(fan)圍(wei)很小,只有少(shao)量的(de)塵(chen)粒在電暈區(qu)通過,獲(huo)得(de)正電荷,沉積在電暈極(ji)上。

大多數塵(chen)粒(li)在(zai)電(dian)暈外區通過,獲得負電(dian)荷,沉積在陽(yang)極板上,當塵埃(ai)聚集到程度,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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