快速流化床入口结构对床层流动特性的影响  

Influence of entrance structure of fast fluidized beds onflow characteristics.

作　　者：白丁荣[1] 易江林[1] 金涌 俞芷青 

机构地区：[1]日本群马大学,清华大学

出　　处：《化工机械》1995年第2期10-14,共5页Chemical Engineering & Machinery

基　　金：国家自然科学基金资助

摘　　要：在直径０．１４ｍ、高１１ｍ的快速流化床装置上，考察了床层入口结构及进风系统村床层流动特性，尤其是截面平均空隙率轴向分布的影响。实验结果表明，由于入口结构的改变，床内两相流动将受到严重影响。当入口结构为弱约束时，截面平均空隙率可为Ｓ型轴向分布。The influence of entrance structure of bed and air sup-ply systems on bed flow characteristics, especially on theaxial distribution of average voidage of the section,was ex-ainined with a fast fluidized bed with a 0. 14ni external di-ameter and 11-m height. The experimental result showedthat the change of entrance structure would have a seriouseffect on the twophase flow in the fluidized bed. The aver-age voidage of the section would become Sshaped axialdistribution when the entrance structure was weak restric-tion.

关 键 词：入口结构 气固流动 空隙率 流化床反应器 

分 类 号：TQ051.13[化学工程]