气升式内环流反应器内局部气含率径向分布  

Local gas holdup profiles in an internal-loop airlift reactor

作　　者：张文晖[1,2] 李鑫钢[2] 

机构地区：[1]天津科技大学天津市制浆造纸重点实验室,天津300457 [2]天津大学化工学院,天津300072

出　　处：《化工学报》2010年第5期1118-1122,共5页CIESC Journal

基　　金：天津科技大学人才启动基金项目(20090419)~~

摘　　要：The local gas holdup profiles in an internal-loop airlift reactor were studied experimentally by using dual electrical conductivity probe under different conditions,including superficial velocity,surface tension and liquid viscosity.The results showed that the radial gas holdup profile has a parabolic shape,which was consistent with the empirical model of Luo.Local gas holdup distribution parameters were obviously influenced by flow regime and almost remained unchanged in the same flow regime.In the gas distributor region,the profiles were steeper in the homogenous flow regime than in the heterogeneous flow regime.However,in the stable region,there was an inverse change trend in two flow regimes.The increase of surface tension,superficial velocity and liquid viscosity made the profile of local gas holdup steeper in two flow regimes.The local gas holdup profiles in an internal-loop airlift reactor were studied experimentally by using dual electrical conductivity probe under different conditions,including superficial velocity,surface tension and liquid viscosity.The results showed that the radial gas holdup profile has a parabolic shape,which was consistent with the empirical model of Luo.Local gas holdup distribution parameters were obviously influenced by flow regime and almost remained unchanged in the same flow regime.In the gas distributor region,the profiles were steeper in the homogenous flow regime than in the heterogeneous flow regime.However,in the stable region,there was an inverse change trend in two flow regimes.The increase of surface tension,superficial velocity and liquid viscosity made the profile of local gas holdup steeper in two flow regimes.

关 键 词：气升式内环流反应器 局部气含率 径向分布 表面张力 黏度 

分 类 号：TQ021.1[化学工程]