高效再生器内轴向颗粒浓度分布的数值计算  

Numerical calculation of axial solid concentration profiles in a high efficiency regenerator

作　　者：程长建[1] 高士秋[1] 

机构地区：[1]中国科学院过程工程研究所多相复杂系统国家重点实验室

出　　处：《计算机与应用化学》2007年第12期1631-1634,共4页Computers and Applied Chemistry

基　　金：国家自然科学基金资助项目(20221603;90210034)

摘　　要：流化床中轴向颗粒浓度的分布形式与流动区域划分密切相关。本文根据能量最小多尺度(energy-minimization multi- scale,EMMS)模型流动区域划分的相关原则,提出了高效再生器内噎塞及非噎塞状态下轴向颗粒浓度S形分布和指数形分布的计算方法,计算结果表明高效再生器内的颗粒浓度随表观气速的减小和固体循环速率的增加而增加,模型计算得到的床层平均颗粒浓度及轴向颗粒浓度分布均与工业测量数据吻合较好。The axial solid concentration profiles in fluidized bed are closely related with the identification of flow regimes in gas-solid flow. Based on the identification of flow regimes using the Energy Minimization Multi-Scale (EMMS) model, a simple method is established to calculate sigmoid and exponential axial solid concentration profiles in a high efficiency regenerator operated at choking or non-choking states. Calculating results show that the solid concentrations in the regenerator increase with the decrease of superficial gas velocity and the increase of solid circulating rate. The calculated bed-averaged solid concentration and the axial solid concentration profiles agree well with the experimental results in the commercial unit.

关 键 词：高效再生器 颗粒浓度 能量最小 多尺度 

分 类 号：TQ018[化学工程]