喷流床中喷动气入口出料规律的研究  

STUDY ON COARSE PARTICLE DISCHARGE BEHAVIOR IN THE CENTRAL INLET OF SPOUTED FLUIDIZED BED

作　　者：刘华彦[1] 王樟茂[1] 赵炳辉[2] 阙端麟[2] 

机构地区：[1]浙江大学化工系 [2]浙江大学半导体材料国家重点实验室

出　　处：《化学反应工程与工艺》1998年第3期293-299,共7页Chemical Reaction Engineering and Technology

基　　金：国家科委高技术处资助项目

摘　　要：在３００ｍｍ的喷流床中，用砂作为流化颗粒，以空气作为流化和喷动气，考察了流化气速、喷动气速、静床高、大颗粒浓度及锥形气体分布器开孔率等对大颗粒在喷动气入口管出料量的影响。从而提出大颗粒下料速率的经验关联式为ｖｐ＝１．９５３×１０－３ｃｂ（Ｕｓ／ｕｔ）－１４．３５ｅｘｐ（－１．３２Ｕｆ／Ｕｍｆ）维持喷动流化床不出料的最小喷动气速计算式为Ｕｓｍｉｎ／ｕｔ＝０．２３１Ｕｆ／Ｕｍｆ＋０．The effects of fluidized velocity, spouted velocity, static bed height, coarse particle concentration and the aperture of conical distributor on the coarse particle discharge rate in the central inlet was investigated in a 300 mm spouted fluidized bed using sand as the fluidized material and air as fluidized and spouted medium. An empirical correlation of coarse particle discharge rate was obtained as: v p =1.953×10 -3 c b (U s /u t ) -14.35 exp (-1.32U f /U mf ) The equation for calculating the minimum spouted velocity, at which the bed remainis no discharge of the coarse particle was obtamed as: U smin /u t =0.231U f /U mf +0.771

关 键 词：喷流床 出料规律 喷动流化床 喷动气速 

分 类 号：TQ051.1[化学工程]