Abstract：The structure of thermal plasma reactor for coal pyrolysis has a significant effect on the gas-solid mixing effect. A preliminary numerical simulation of the gas-solid flow and mixing behavior of plasma jet and pulverized coal in a venturi reactor was carried out. The simulation result was compared with that of the tubular reactor. The results showed that the venturi reactor could be divided into two parts: one for mixing and the other for reacting. Its special structure could increase the incident depth of the pulverized coal particles, prolong residence time and increase the contact area for the two phases. The result of 50 kW experiment confirmed our simulation. Finally, the influence of the reaction section size on the flow field was discussed. It showed that the range of the recirculation zone was reduced in the smaller divergence ratio. The optimal contacting time between pulverized coal and jet could be obtained by selecting appropriate pipe diameter and length.
CHEN Lu,MA Chuanqi,CHENG Dangguo et al. Simulation of Gas-Solid Flow and Mixing Behavior of Coal Pyrolysis in a Venturi Plasma Reactor[J]. 化学反应工程与工艺, 2019, 35(3): 193-199.
