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徐州濕式靜電除塵器生產廠家

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徐州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。

比電阻(zu)過(guo)低,塵粒(li)難以保持在集(ji)塵電極(ji)上,致(zhi)使其(qi)重返(fan)氣流(liu)。比電阻(zu)過(guo)高,到(dao)達集(ji)塵電極(ji)的塵粒(li)電荷(he)不易(yi)放出(chu),在塵層之間(jian)形(xing)成電壓(ya)梯(ti)度(du)會(hui)產生局部擊穿和放電現(xian)象。

這些情況都(dou)會造(zao)成除塵(chen)(chen)(chen)效(xiao)率下降。工作(zuo)原理/靜電(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)器(qi)用強電(dian)(dian)(dian)(dian)場(chang)使(shi)(shi)灰(hui)塵(chen)(chen)(chen)顆粒(li)(li)帶(dai)電(dian)(dian)(dian)(dian),在(zai)其通(tong)過(guo)除塵(chen)(chen)(chen)電(dian)(dian)(dian)(dian)極(ji)時(shi),帶(dai)正/負(fu)電(dian)(dian)(dian)(dian)荷(he)(he)的(de)(de)微粒(li)(li)分別被負(fu)/正電(dian)(dian)(dian)(dian)極(ji)板(ban)吸附,即(ji)達到除塵(chen)(chen)(chen)目的(de)(de).由(you)于輻射(she)摩擦等原因(yin),空(kong)氣(qi)中含(han)有(you)少(shao)量的(de)(de)自(zi)由(you)離(li)(li)子,單靠(kao)這些自(zi)由(you)離(li)(li)子是(shi)(shi)不可(ke)能使(shi)(shi)含(han)塵(chen)(chen)(chen)空(kong)氣(qi)中的(de)(de)塵(chen)(chen)(chen)粒(li)(li)充(chong)分荷(he)(he)電(dian)(dian)(dian)(dian)的(de)(de)。因(yin)此,要利用靜電(dian)(dian)(dian)(dian)使(shi)(shi)粉塵(chen)(chen)(chen)分離(li)(li)須具備兩個基本條件,一(yi)是(shi)(shi)存(cun)在(zai)使(shi)(shi)粉塵(chen)(chen)(chen)荷(he)(he)電(dian)(dian)(dian)(dian)的(de)(de)電(dian)(dian)(dian)(dian)場(chang);二是(shi)(shi)存(cun)在(zai)使(shi)(shi)荷(he)(he)電(dian)(dian)(dian)(dian)粉塵(chen)(chen)(chen)顆粒(li)(li)分離(li)(li)的(de)(de)電(dian)(dian)(dian)(dian)場(chang)。一(yi)般的(de)(de)靜電(dian)(dian)(dian)(dian)除塵(chen)(chen)(chen)器(qi)采(cai)用荷(he)(he)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)場(chang)和分離(li)(li)電(dian)(dian)(dian)(dian)場(chang)合一(yi)的(de)(de)方法,放(fang)電(dian)(dian)(dian)(dian)極(ji)的(de)(de)金(jin)屬棒接(jie)高壓直(zhi)流電(dian)(dian)(dian)(dian)源的(de)(de)負(fu)極(ji),集(ji)塵(chen)(chen)(chen)極(ji)接(jie)地為正極(ji),集(ji)塵(chen)(chen)(chen)極(ji)可(ke)以采(cai)用圓管,也可(ke)以采(cai)用平板(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。

電壓升高到數值后,放電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)附近的(de)離(li)子(zi)(zi)獲得了較高的(de)能量和(he)速度,它們撞擊空氣中(zhong)的(de)中(zhong)性原子(zi)(zi)時,中(zhong)性原子(zi)(zi)會分解成(cheng)正(zheng)、負離(li)子(zi)(zi),這(zhe)種現象稱為(wei)空氣電(dian)(dian)(dian)(dian)(dian)離(li)。空氣電(dian)(dian)(dian)(dian)(dian)離(li)后,由于聯鎖反應,在(zai)極(ji)(ji)間(jian)運動的(de)離(li)子(zi)(zi)數大大增加(jia),表現為(wei)極(ji)(ji)間(jian)的(de)電(dian)(dian)(dian)(dian)(dian)流急劇增加(jia),空氣成(cheng)了導體。放電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)周圍(wei)的(de)空氣全部電(dian)(dian)(dian)(dian)(dian)離(li)后,在(zai)放電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)周圍(wei)可以看見一(yi)圈淡藍色的(de)光(guang)環(huan),這(zhe)個(ge)光(guang)環(huan)稱為(wei)電(dian)(dian)(dian)(dian)(dian)暈(yun)。電(dian)(dian)(dian)(dian)(dian)除塵器的(de)電(dian)(dian)(dian)(dian)(dian)暈(yun)范圍(wei)通(tong)常局限于金屬棒周圍(wei)幾毫米處。

空(kong)氣在電(dian)(dian)暈(yun)范(fan)圍(wei)電(dian)(dian)離后,正(zheng)離子(zi)很(hen)(hen)快(kuai)向負(fu)極(ji)移動,只有負(fu)離子(zi)才會進入電(dian)(dian)暈(yun)外區(qu),向陽極(ji)移動。含塵空(kong)氣通過電(dian)(dian)除(chu)塵器時,由(you)于電(dian)(dian)暈(yun)區(qu)的范(fan)圍(wei)很(hen)(hen)小,只有少量的塵粒在電(dian)(dian)暈(yun)區(qu)通過,獲得正(zheng)電(dian)(dian)荷(he),沉積在電(dian)(dian)暈(yun)極(ji)上(shang)。

大多數塵(chen)粒在電(dian)暈外(wai)區通(tong)過,獲得(de)負電(dian)荷,沉積在陽(yang)極(ji)板上,當塵(chen)埃聚集到程度,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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