Numerical Simulation Of Gas-Solid Two Phase Flow In Cyclone Separator

Cyclone separator is a rotary motion separate equipment, which uses the effect of centrifugal force separating the solid particles from the flow of gas-solid fluid. It is a simple structure, easy maintenance, high temperature, and low cost advantages in environmental protection, powder, oil, chemical, metallurgy, materials widely used in many fields.In this paper, computational fluid dynamics software FLUENT has been used to simulate the CLT/A-type cyclone separator.Firstly, distribution of the temperature field was simulated inside the cyclone, and analysis the temperature distribution inside the cyclone separator.Secondly, on the basis of temperature field numerical simulation, a simulation of internal flow was made in the cyclone. Gas flow field simulationis the base of the next step about two-phase flow simulation. Anisotropic turbulence model (RSM) was based on, the corresponding difference scheme of QUICK and pressure interpolation format of PRESTO has been used in numerical simulation analysis. And, at the same time, ensure high-quality structured grid. We has made an anlysis of the ditribution of internal gas velocity, distribution of pressure and pressure loss, turbulence distribution of the flow field, Reynolds stresses and secondary flow phenomena.Thirdly, internal gas-solid flow was simulated in the cyclone separator. Stochastic model with discrete-phase and the phase coupling simulation method were used in the simulation of the solid particles. Through the analysis, we obtained the particle trajectories in the separator, gas flow’s effects to the particle phase, the influence of inlet velocity, rate of flow, particle density and other parameters to the efficiency of the separation.Finally, structural parameter’s influence to separation performance was analysised, and the structural parameter are the diameter of the exhaust pipe and the depth of exhaust pipe mainly. On that basis, we made a structural optimization to the CLT/A-type cyclone, and then re-simulated. The performance of the improved separator were compared with the previous. The simulation results show that performance of the improved cyclone separator has been greatly improved. It validate the feasibility of the optimization.