Abstract：The configuration of the packing in the extraction column determines the mass transfer efficiency, and the volume of fluid (VOF) model of the computational fluid dynamics (CFD) method was used to simulate the two-phase flow of liquids with high density difference in structured packings with different configurations. A 3D image of droplet movement in the packed column was obtained, and the process of droplet breakup and coalescence was examined. The simulation results showed that the breakup and coalescence in the diagonal corrugated packing existed simultaneously, which resulted in smaller droplet size. However, the dispersion phase droplets in the diagonal corrugated packing moved faster and the residence time was smaller. The droplets in the horizontal corrugated packing were aggregated to some extent to form lager-sized droplets, and the moving speed of the dispersed phase droplets was slower, with a longer residence time. Combined with the characteristics of two packings, the diagonal corrugated packing and the horizontal corrugated packing were alternately placed to form a new packing, the new packing had a large average residence time and a small droplet size. Compared with the diagonal corrugated packing and the horizontal corrugated packing, the new packing had a higher two-phase effective interfacial area ratio.
GUO Fangyuan,WANG Lijun,CHENG Youwei et al. Simulation of High Density Differential Liquid-Liquid Two-Phase Flow in Structured Packing[J]. 化学反应工程与工艺, 2020, 36(2): 97-107.
