電除塵器是在兩個(gè)曲率半徑相差較大的金屬收塵極(陽極)和電暈極(陰極)上通過高壓直流電,并維持一個(gè)足以使含塵氣體(指一般的含塵煙氣,不含腐蝕性和劇毒)電離的靜電場(見圖1)。含塵氣體在靜電場中電離后所生成的電子、陰離子和陽離子吸附在通過電場的粉塵上,而使粉塵獲得電荷自身帶電。荷電粉塵在電場力的作用下向電極性相反的電極(收塵極和電暈極)運(yùn)行而沉積在電極上,從而達(dá)到粉塵和氣體分離的目的。當(dāng)沉積在電極上的粉塵達(dá)到一定厚度時(shí),借助于收塵極、電暈極振打機(jī)構(gòu)使粉塵落入下部的灰斗中,再經(jīng)過卸灰輸灰系統(tǒng)將粉塵排出,而凈化后的氣體從電除塵器出口處排入大氣中[1]。
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3系統(tǒng)組成
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