基于PFC-CFD的双环径向反应器流场特性数值模拟  

Numerical Simulation of Flow Field Characteristics in a Double-Ring Radial Reactor Based on PFC-CFD

作　　者：岳蓓蓓 张亚新[1] YUE Beibei;ZHANG Yaxin(School of Chemical Engineering,Xinjiang University,Urumqi Xinjiang 830017,China)

机构地区：[1]新疆大学化工学院,新疆乌鲁木齐830017

出　　处：《新疆大学学报（自然科学版）（中英文）》2022年第1期34-41,共8页Journal of Xinjiang University(Natural Science Edition in Chinese and English)

基　　金：国家自然科学基金项目(21766034).

摘　　要：双环径向反应器是一种具有更低床层压降和更高节能效率的反应器,为研究催化剂床层和反应器结构对反应器内流场的影响,模拟了颗粒尺寸为10 mm、12 mm、16 mm和20 mm随机堆积床层和分布筒开孔率为0.044、0.087和0.121时反应器内流场变化规律.结果表明:用较小的催化剂颗粒填充的床层具有更高的流场均匀度,综合对比,粒径为12 mm的颗粒堆积的床层流场均匀度最优;随着开孔率由0.121减小至0.044,内床层均匀度由负转正,外床层均匀度由0.36增至0.84.通过两因素综合比较,发现开孔率对流场均匀度的影响大于粒径的影响,减小分布筒开孔率能快速提高流场均匀度.The double-ring radial reactor is a reactor with lower bed pressure drop and higher energy-saving efficiency.In order to study the influence of the catalyst bed and reactor structure on the flow field in the reactor,the changes of the flow field in the reactor with randomly stacked beds of 10 mm,12 mm,16 mm and 20 mm are simulated and the flow field changes in the reactor when the opening rates of the distribution cylinder are 0.044,0.087 and 0.121.The results show that although the bed filled with smaller catalyst particles has greater bed resistance,it also has higher flow field uniformity.After comprehensive comparison,the radial reactor with a 12 mm stacked bed has the best flow field distribution.As the opening ratio decreases from 0.121 to 0.044,the uniformity of the inner bed changes from negative to positive,and the uniformity of the outer bed increases from 0.36 to 0.84.Through the comprehensive comparison of the two factors,it is found that the opening ratio has a greater influence on the flow field uniformity than the particle size,and opening the aperture ratio can quickly improve the flow field uniformity.

关 键 词：双环径向反应器 数值模拟 颗粒尺寸 开孔率 流场均匀度 

分 类 号：TQ051.1[化学工程]