Abstract：The hydrodynamics of gas-solid flow in a circulating fluidized bed desulfurization reactor was simulated by using two-fluid model and granular kinetics theory. The gas-solid inter-phase drag force is simulated by the Syamlal O’Brien drag model considering the particles clusters. The simulated time-averaged particle concentration and pressure drop agreed well with experimental data, which verified the feasibility of the simulation method. The instantaneous particle velocities and their probability density functions showed that the particles moved upward and downward near the wall. In general most particles moved upward in the CFB, while the microcosmic internally circulating flow of particles existed simultaneously The instantaneous particle velocity profiles offered an interpretation for the non-uniform distribution of time-averaged particle velocity, which proved that the OS drag model was better than Gidaspow drag model in the simulation of CFB.
Li Yujia1,2,Wang Xue1 et al. Numerical Simulation of Gas Solid Flow in the Circulating Fluidized Bed Desulfurization Reactor[J]. 化学反应工程与工艺, 2014, 30(1): 91-96.
