Study On Muiti-Environmental Mass Transfer And Mixing In High Gravity Environment In Rotating Packed Bed

With the development of rotating packed bed from1976to the present, it has been widely used due to short residence time, huge interfacial area and high mass transfer coefficient. With the progress of computer science and the theory of multiphase flow, study on hydromechanics and mass transfer process is basic through the methods of combination numerical simulation with experiment. Based on the experimental data, the method of CFD is used in this paper to simulate mixing and mass transfer in a RPB. Multi-environmental behaviors are intensive discussed to provide the theoretical basis of the actual operation.Based on the analysis on the intrinsic feature of mixing and transportation processes in a RPB and the physical model of liquid films flow, a3-environment micromixing model is established to explore the situation of micromixing and mass transfer in RPB in this paper. The Fortran language is used in this paper for numerical simulation. The model results are in good agreement with the experimental data indicating that3-environment model is appropriate in describing the micromixing and mass transfer in PRB. The fluid flow with different rotational speed is studied in this paper. The macroscopic and microscopic distribution of Concentration of reactant and product, which affect the degree of mixing and mass transfer, are discussed in packing spaces and wire meshes in RPB. Influence of the rotational speed, the volume ratio and the initial concentration on the micromixing and mass transfer has been considered. According to the simulation results, the structural parameters of RPB have been optimized. The simulation results lead to a deeper understanding on the micromixng and mass transfer in RPB and for further study.