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電捕焦油器結構及原理

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電捕焦油器采用結構形式有同心圓(yuan)式、管(guan)式和蜂窩式等三種。無論哪種結構,其(qi)工作(zuo)原理,即(ji)在金(jin)屬導線與金(jin)屬管(guan)壁〔或極板(ban)〕間施加高壓直流電,以(yi)維持足(zu)以(yi)使氣體產生(sheng)電離的電場,使陰陽極之間形成電暈區。

工(gong)作(zuo)機理:

氣(qi)體(ti)的(de)(de)放電(dian)(dian)(dian)過程(cheng) : 在(zai)(zai)通常情況下氣(qi)體(ti)是不導電(dian)(dian)(dian)的(de)(de),但(dan)在(zai)(zai)高(gao)壓電(dian)(dian)(dian)場的(de)(de)作用下氣(qi)體(ti)內部的(de)(de)電(dian)(dian)(dian)子(zi)便會(hui)獲得(de)足夠的(de)(de)能量成(cheng)為自(zi)由電(dian)(dian)(dian)子(zi)而(er)(er)導電(dian)(dian)(dian),被稱為自(zi)發(fa)性(xing)電(dian)(dian)(dian)離(li)現象。氣(qi)體(ti)的(de)(de)自(zi)發(fa)性(xing)電(dian)(dian)(dian)離(li)是建(jian)立(li)在(zai)(zai)非(fei)均(jun)(jun)勻性(xing)電(dian)(dian)(dian)場中。在(zai)(zai)均(jun)(jun)勻性(xing)電(dian)(dian)(dian)場中,隨著電(dian)(dian)(dian)壓的(de)(de)增加,只要其間(jian)(jian)任何一點(dian)發(fa)生電(dian)(dian)(dian)離(li),兩(liang)極間(jian)(jian)將立(li)即充滿(man)帶電(dian)(dian)(dian)離(li)子(zi),整(zheng)個(ge)空間(jian)(jian)的(de)(de)氣(qi)體(ti)被擊穿(chuan)。此時電(dian)(dian)(dian)流急劇增加而(er)(er)形成(cheng)火花放電(dian)(dian)(dian)。而(er)(er)在(zai)(zai)非(fei)均(jun)(jun)勻性(xing)電(dian)(dian)(dian)場中,電(dian)(dian)(dian)場強度則隨兩(liang)極間(jian)(jian)的(de)(de)距離(li)增大而(er)(er)迅速(su)下降。

工業中的選擇 :

根據供電(dian)(dian)(dian)極性的不同(tong),電(dian)(dian)(dian)暈有陰(yin)電(dian)(dian)(dian)暈和陽(yang)電(dian)(dian)(dian)暈之分。在工業(ye)生產中,大(da)多(duo)采用陰(yin)電(dian)(dian)(dian)暈,因(yin)為在相同(tong)的條件下,陰(yin)電(dian)(dian)(dian)暈可以(yi)獲得比(bi)陽(yang)電(dian)(dian)(dian)暈高的電(dian)(dian)(dian)流(liu),而且其閃(shan)絡(luo)電(dian)(dian)(dian)壓也遠比(bi)陽(yang)電(dian)(dian)(dian)暈放電(dian)(dian)(dian)要高。

影(ying)響電(dian)捕(bu)性能的主要(yao)因素(su):

由于(yu)影(ying)響電捕焦油器操作性能的(de)因素很多,選(xuan)型時請告知粉(fen)塵與霧滴的(de)密度(du)(du)、粘度(du)(du)、比電阻、氣體溫度(du)(du)、壓力、濕(shi)度(du)(du)、流速與雜(za)濃度(du)(du)等。