Abstract: On the basis of gas-liquid two-phase flow theory (CFD) and properties of FCC spray drying process, a CFD model was developed to simulate the amount of two phases flow, heat and mass transfer process in the spray dryer, and the flow velocity patterns, temperature distribution, and solid particle trajectories in the spray dryer are then obtained and visualized. The simulation results are compared with the experimental data of spray drying tower in pilot plant, and the results showed that the two trends are consistent with the maximum deviation of less than 10%. The model can be used to simulate the FCC catalyst spray drying process.

Key words: spray dryer, FCC catalyst, Eulerian-Lagrangian method, numerical simulation