Simulation and prediction of co-combustion of oil shale retorting solid waste and cornstalk in circulating fluidized bed using CPFD method

摘要

In this paper, a three-dimensional compressible mathematical model of circulating fluidized bed (CFB) combustion was established, by using the Euler-Lagrangian method, based on the Computational Particle Fluid Dynamics (CPFD). The model considers heat and mass transfer, the phase chemical reaction. The distribution of temperature, gas composition, particle residence time and velocity of the co-combustion of oil shale retorting solid waste with cornstalk particles in the CFB were obtained, by using simulation calculation under a variety of operating parameters. The results of the model are established and analyzed. The optimal operating conditions of co-combustion of oil shek retorting Solid waste and cornstalk particles in the CFB were obtained, which provide meaningful values for the experiment, design and working condition of the CFB.