【摘 要】
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The local gas-phase flow characteristics such as local gas holdup (εs), local bubble velocity (Vb) and local bubble mean diameter (db) at a specified point in
【机 构】
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College of Chemical Engineering, Tianjin University, Tianjin 300072, ChinaCollege of Physics Science
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The local gas-phase flow characteristics such as local gas holdup (εs), 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 dianeter 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 eg and Vb, but also decreased the local db. The optimum solid loading for the maximum local εg and Vb together with the minimum local db was 0.16 × 10-3 m3,corresponding to a solid volume fraction, εs = 2.5%.
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