Structure Optimization and Flow Field Analysis of Polyphenylene Sulfide Polymerization Stirring Reactor
1. Key Laboratory of Oil & Gas Fine Chemicals of Ministry of Education, College of Chemical Engineering, Xinjiang University, Urumqi 830046, China;
2. Engineering Research Center of Process System Engineering, East China University of Science and Technology, Shanghai 200237, China
Abstract Polyphenylene sulfide (PPS) is one of special engineering plastics with excellent comprehensive performance, which core equipment is polymerization stirring reactor. In the present work, the effect of impeller configurations including impeller combinations and distance between impellers on liquid-solid flow had been simulated by computational fluid dynamics using multiple reference frame method and mixture multiphase flow model. In order to validate the numerical results, flow experiments had been performed. The numerical results agreed well with the flow test results, which could ensure the reliability and accuracy of the numerical results. The results indicated that adopting three-layer down-pumping pitched blade turbines with anchor impeller can achieve synergic effect and satisfy efficient bulk circulation in the polymerization reactor and relatively uniform distribution of the polymer particles. Meanwhile, this optimized impeller combination showed good adaption with varying liquid viscosity, particle size and particle content during PPS polymerization process.
