Study on the flow characteristics of the pulsating intermittent liquid-solid fluidized bed with sinusoidal liquid velocity

Abstract

The sinusoidal pulsation velocity was proposed in this work to further improve the relative velocity and mass transfer efficiency between the liquid and solids phases. The flow behavior of the particles and the relative velocity between the liquid and solids phases were simulated by Eulerian-Eulerian approach incorporating the kinetic theory of granular flow. The numerical results agreed well with the experimental data obtained by the laboratory experimental system. The average axial solids holdup in a whole time period of the sinusoidal liquid velocity was higher in the middle part and lower at the top and bottom of the fluidized bed. The average relative velocity between the liquid and solids phases of the whole bed changed in a sinusoidal form with the same time period of the liquid velocity. Based on the numerical results, the regressional empirical formula of the relative velocity between the liquid and solids phases was obtained.