Simulation of Material Movement in the Process of Catalytic Pyrolysis of Waste Tires

This paper studies the material movement characteristics of waste tires in the catalytic pyrolysis reaction process. The reactor is divided into three zones by the correlation between the conversion rate α and the change of physical properties. The discrete element simulation software EDEM is used to simulate the movement characteristics of materials at different rotate speeds, pyrolysis reactor zones, and material states. The simulation results show that the different physical properties of reaction system are the main reason for the difference in the movement characteristics of the materials at the same speed, and the mixing effect of the materials in each zone are improved as the rotate speed of the pyrolysis reactor increases. At the same time, the viscous flow is the main state of waste tires in the pyrolysis process, and the mixing effect is extremely poor. To this end, the relevant research on the movement of the viscous solid material at low rotate speed is done, and it is confirmed that the addition of a high heat capacity medium has a significant effect on improving the movement of the viscous solid material.