Local Gas Phase Flow Characteristics of a Gas-Liquid-Solid Three-Phase Reversed Flow Jet Loop Reactor  

作　　者：闻建平 周怀 陈云琳 

机构地区：[1]CollegeofChemicalEngineering,TianjinUniversity,Tianjin300072,China

出　　处：《Chinese Journal of Chemical Engineering》2002年第1期119-122,共4页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No. 29706006) and the General Corporation of Petrochemical Engineering of China (No.X598021).

摘　　要：The local gas-phase flow characteristics such as local gas holdup(εg), local bubble velocity (V_b) and local bubble mean diameter(d_b) at a specified point in a gas-liquid-solid three-phase reversedflow jet loop reactor was experimentally investigated by a five-pointconductivity probe. The effects of gas jet flow rate, liquid jet flowrate, solid loading, nozzle diameter and axial position on the localεg, V_b and d_b profiles were discussed. The presence of solids atlow solid concentrations not only increased the local εg and V_b,but also decreased the local d_b. The optimum solid loading for themaximum local εg and V_b together with the minimum local d_b was0.16×10^-3 m^3, corresponding to a solid volume fraction ε_S＝2.5/100.The local gas-phase flow characteristics such as local gas holdup (εg), local bubble velocity (Vb) and local bubble mean diameter(db) at a specified point in a gas-liquid-solid three-phase reversed flow jet loop reactor was experimentally investigated by a five-point conductivity probe. The effects of gas jet flow rate, liquid jet flow rate, solid loading, nozzle diameter and axial position on the local εg,Vb and db profiles were discussed. The presence of solids at low solid concentrations not only increased the local εg and Vb, but also decreased the local db. The optimum solid olading for the maximum local εg and Vb together with the minimum local db was 0.16×10^-3m^3, corresponding to a solid volume fraction,εS=2.5%.

关 键 词：local gas holdup local bubble velocity local bubble mean diameter gas-liquid-solid three-phase 

分 类 号：TQ021[化学工程]