Abstract:The flow field characteristics in a 1t/d oil shale gas heat carrier dry distillation furnace were numerically simulated. Based on the computational fluid dynamics (CFD) theory method, the porous medium model and turbulence model based on the Ergun equation are used for research. The simulation results are compared with the previous research results. It shows that the closed model, such as porous media model with added resistance source term and RNG k-ε turbulence model, can better simulate the flow field distribution characteristics in the furnace and optimize it based on the original structure, and add coaxial and eccentric shaft impact flow air distribution. In the air distribution mode proposed in this paper, a good velocity field and pressure field can be formed by using either coaxial or eccentric axis arrangement. So as to improve the gas mixing degree in the dry distillation section, widen the range of the gas distribution, increase the contact area and time between the gas solid particles, strengthen the heat exchange and ensure the dry distillation effect. The simulation results can provide a theoretical basis for the development of large-capacity gas heat carrier dry distillation furnace and optimization design.