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对气液固三相提升管内液相扩散行为进行了实验研究,考察了气速、液速以及颗粒循环量等操作因素对液相扩散系数的影响规律.实验研究结果表明,轴向、径向扩散系数随气速的增大均增大;轴向扩散系数随液速的变化基本保持不变,径向扩散系数随液速的增大而减小;轴向、径向扩散系数随颗粒循环量的增大均增大.与传统的气液固三相流化床相比,气液固三相提升管反应器更接近理想的平推流反应器.
The liquid phase diffusion behavior in gas-liquid-solid three-phase riser was investigated experimentally and the effects of operating factors such as gas velocity, liquid velocity and particle circulation on the liquid phase diffusion coefficient were investigated.The experimental results show that the axial and radial The diffusion coefficient increases with the increase of gas velocity. The axial diffusion coefficient keeps the same with the change of liquid velocity, while the radial diffusion coefficient decreases with the increase of liquid velocity. The axial and radial diffusion coefficients vary with particle circulation Compared with the traditional gas-liquid solid three-phase fluidized bed, the gas-liquid solid three-phase riser reactor is closer to the ideal push-flow reactor.