擋板(ban)門通常采用(yong)(yong)百葉窗(chuang)式隔(ge)板結構，雙層隔(ge)板在(zai)關斷時通入密封，實現關斷后的(de)隔(ge)煙(yan)(yan)作用(yong)(yong)。按(an)其(qi)分(fen)類(lei)，可分(fen)為(wei)電動(dong)煙(yan)(yan)氣(qi)(qi)(qi)擋(dang)、氣(qi)(qi)(qi)動(dong)煙(yan)(yan)氣(qi)(qi)(qi)擋(dang)和(he)手(shou)動(dong)煙(yan)(yan)氣(qi)(qi)(qi)擋(dang)三(san)種。該裝(zhuang)置主要用(yong)(yong)于(yu)石油、石化(hua)、化(hua)工、電廠(chang)等煙(yan)(yan)氣(qi)(qi)(qi)脫硫系(xi)統的(de)吸收(shou)塔的(de)進、出(chu)口或(huo)(huo)旁路煙(yan)(yan)道，或(huo)(huo)用(yong)(yong)于(yu)煙(yan)(yan)氣(qi)(qi)(qi)脫硝和(he)煙(yan)(yan)氣(qi)(qi)(qi)除塵系(xi)統中，作為(wei)煙(yan)(yan)氣(qi)(qi)(qi)管道管路的(de)關斷、調整用(yong)(yong)。
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