摘要：在移动床排料装置上, 研究加压条件下移动床表观颗粒速度、表观气速及入口压力对并流移动床空隙率的影响。结果表明, 在表观颗粒速度或表观气速不变的情况下, 移动床空隙率随入口压力的升高而减小;在入口压力不变的情况下, 移动床空隙率基本不随表观颗粒速度和表观气速变化。对实验结果进行非线性拟合, 得到气固并流移动床空隙率的压力拟合公式, 利用该拟合公式和Ergun方程可计算移动床压降, 在实验数据范围内, 计算压降与实验压降的最大偏差小于±10%。

关键词：移动床；空隙率；压降

Abstract：The effects of inlet pressure, superficial gas velocity and superficial solid velocity on the voidage of pressured moving bed were investigated experimentally. When superficial solid velocity or the superficial gas velocity stays the same, the voidage decreases with the increase of the inlet pressure. However, when the inlet pressure remains constant, the superficial solid velocity superficial gas velocity have little influence on the voidage. It is found that the voidage can be calculated by ε=0.32+0.04067/Pin.With the fitting formula of voidage and Ergun equation, the pressure drop can be conveniently calculated. The maximum deviation between the calculated values and experimental data is less than ±10%.

Keywords: moving bed；voidage；pressure drop