气-液-固三相逆流化床动力学研究

在内径0.152 m,高2.5 m的气-液-固三相逆流化床中系统研究了动力学特性。获得了气体和液体速度及聚乙烯和聚丙烯颗粒密度对各相含率和最小液体流化速度的影响规律。研究发现随着气体速度的增加,液体最小流化速度降低;随着气体或液体速度增加,气体、液体和固体含率均增加。

Kinetic Study on Gas-Liquid-Solid Three Phases Inverse Fluidized Bed

A gas-liquid-solid three phases inverse fluidized bed with 0.152 m inner diameter and 2.5 m height was employed to investigate the hydrodynamics. Effect of gas and liquid velocities and particle density (polyethylene and polypropylene) on the individual phase holdup and the minimum liquid fluidization velocity was determined. The results show that the minimum liquid fluidization velocity decreases with increasing of gas velocity in the gas-liquid-solid three phases inverse fluidized bed. The gas and liquid and solid holdups increase with increasing of the gas or liquid velocity in the gas-liquid-solid three phases inverse fluidized bed.