CFD simulation of the hydrodynamics of gas solid flow in the FCC strippers

In this paper, the hydrodynamic characteristics in bubbling fluidized beds (FCC Strippers) were simulated using computational fluid dynamics tools. Compared with the bed densities of 650-900kg/m3 in the empty cylinder stripper, bed densities in the V-baffled stripper were 600-800kg/m3 at the superficial gas velocity of 0.05–0.20 m/s. The overall trend of the time-averaged bed density at various superficial gas velocities were in agreement with the experimental data. The results illustrated that internal baffles had an important effect on the fluidization hydrodynamics. Internal baffles improved break-up and redistribution of bubbles and intensified the gas–solid contact.