鼓泡流化床中多组分颗粒分离的软球模拟

基于颗粒轨道模型，建立了粒径服从均匀分布的多组分颗粒体系分离的软球模型，模拟了粒径服从均匀分布的连续组分、三组分颗粒体系在流化床中的分离行为，并研究了表观气速不同时，连续组分、三组分颗粒体系的分离规律；同时讨论了粒径分别服从均匀分布与正态分布时，三组分颗粒体系分离行为的差异。研究结果表明：表观气速对连续组分、三组分颗粒体系的分离行为都有重要影响，但影响不同，粒径分布不同对三组分颗粒体系的分离行为没有显著影响。

Segregation of Multiple Solid Phases by Soft-sphere Simulation in Bubbling Fluidized Beds

Based on the particle-motion-resolved discrete model,a soft-sphere model used for the simulation of particle segregation in fluidization is established,in which particle diameters are unequal. The model can be used for the simulation of segregation behaviors of continuous solid phase and three solid phases in bubbling fluidization, in which particle diameters obey even distribution. The segregation rules of continuous solid phase and three solid phases are discussed under different gas superficial velocities. And when the particle diameters obey even distribution or normal distribution, the difference on the segregation behaviors for continuous solid phase and three solid phases is also discussed. Simulation results show that the gas superficial velocity has important influence not only on the segregation of continuous solid phase, but also on the segregation of three solid phases. However the influence of gas superficial velocity on the segregation of three solid phases is different from that of continuous solid phase. The distribution of particle diameters has little influence on the segregation of three solid phases.