滴流床反应器内脉冲流下动持液量实验

对气液强相互作用下滴流床反应器内的流体动力学进行了分析讨论 .实验测定了脉冲流流型下的床层平均动持液量 .考察了气液流率、液体黏度、填料材料等因素对动持液量的影响 .根据对滴流床反应器内流体流动机理的分析及实验结果 ,提出了关联脉冲流型式下动持液量的关联式 .该关联式能很好地关联实验数据 ,可用于预测温和型脉冲流下的动持液量

EXPERIMENTAL INVESTIGATION OF DYNAMIC LIQUID HOLDUP UNDER PULSE FLOW IN TRICKLE-BED REACTOR

The theoretical analyses of the hydrodynamics under a strong interaction flow regime were conducted and data of the bed averaged dynamic liquid holdup were obtained.The influence of gas and liquid velocity, liquid viscosity and packing materials on dynamic liquid holdup was investigated. The liquid superficial velocity has less significance on liquid holdup than gas superficial velocity.Actually it affects liquid holdup,especially under a mild pulsing flow regime.Liquid viscosity has no significance on liquid holdup,compared to gas and liquid phase velocity.The properties of the packed materials,such as lubricity,roughness etc.,were found to have a strong effect on liquid holdup.Based on the experimental data and theoretical analyses a new variety of correlation was proposed for dynamic liquid holdup under pulse flow,which was expressed as βd=1.3242*γ*Re0.05666L*Re-0.3324g(for ceramic beads γ＝1.0 and glass beads γ＝1.42).The equation correlated the experimental data well and had good reliability in predicting dynamic liquid holdup under mild pulse flow.