CFD Simulation And Experiment Of Study Of Novel In Structured Packing Development

Structured packings are widely used in chemical separation processes however low viscosity absorbent is necessary for the existing packings. Since the absorbents in capturing CO2are viscous, designing a structured packing which can accommodate viscous absorption becomes more and more important. A novel vertical-sheet structured packing has been developed in our lab which can be routine operated with viscous absorbent. CFD method was used in this paper to simulate flow and mass transfer characteristics and optimize the structure of packing, the relationship between vorticity and concentration field was revealed. Then the experiment was carried out to study the performance of fluid dynamic and mass transfer.2D mass transfer model was established by CFD method and the relationship between vorticity and mass transfer was investigated by correlation coefficient R. The result showed the wall vorticity and concentration are relevant (R>0.8) and hence the wall vorticity is one important factor in the mass transfer process. Then, the vertical-sheet structured packing was optimized by CFD method and the experiment of oxygen desorption from water was carried out in order to test the optimized packing. The result showed the pressure drop of optimized packing was decreased by18%-35%than the initial one and the performance of mass transfer was at the similar level. Both mass transfer and pressure drop performance are more superior than corrugated structured packing was attained. Finally the novel packing was tested in the viscous absorption to investigate the effect of the structure of windows. The result showed the mass transfer coefficient with windows was enhanced by15%-30%and the pressure drop was decreased by50%than the structure without windows. Hence, the superiority of the structure of windows in viscous absorption was confirmed.