气液固流化床固体轴向浓度分布模型的研究进展

BRIEF REVIEW ON THE DEVELOPMENT OF MODELS FOR AXIAL DISTRIBUTION OF SOLID CONCENTRATION IN GAS-LIQUID-SOLID THREE-PHASE FLUIDIZED BED

综述了描述气液固三相流化床中固体颗粒轴向浓度分布的沉降 -分散模型和尾涡夹带机理模型 ,以及它们的推广与应用 ,同时指出这些模型在应用中的局限性。

Gas-liquid-solid three-phase fluidized beds have been widely used in the fields of both chemical technology and biotechnology. Axial distribution of the solid particles in fluidized beds may affect the hydrodynamics of the beds, which in turn affects the conversion rate and the mass and heat transfer inside the beds. An overview of the current state of knowledge on modeling the axial distribution of solid particles in fluidized beds was presented in this paper. Emphasis was placed on a discussion of the sedimentation-dispersion model because it is often adopted to describe the axial distribution of solid particles for single- or multi-component in the beds. In addition, models taking account of entrainment or shedding in the wake of bubbles was also presented.