鼓泡床与环流反应器流动特性的比较  

COMPARISON OF HYDRODYNAMIC CHARACTERISTICS IN BUBBLE COLUMN AND AIRLIFT LOOP REACTORS

作　　者：王剑 薄守石 白飞 孙兰义[1] 

机构地区：[1]中国石油大学(华东)化学工程学院,山东青岛266580

出　　处：《石油炼制与化工》2014年第12期17-22,共6页Petroleum Processing and Petrochemicals

基　　金：国家自然科学基金资助项目(No.21276279);中央高校基本科研业务费专项资金资助项目(No.27R1204008A);高等学校博士学科点专项科研基金新教师类资助课题(No.20120133120004)

摘　　要：选用欧拉-欧拉多相流模型和RNGk-ε湍流模型对重油悬浮床加氢反应器流动特性进行数值模拟,分别模拟了鼓泡床反应器和两种不同导流筒直径的环流反应器,考察了重油-氢气实际体系在不同反应器内气含率和轴向液速的异同。结果表明,悬浮床反应器在操作条件下均形成液相循环流动;导流筒能够规整环流反应器内的流动,增大上升区和下降区的流速,增强混合,同时提高下降区的气含率,从而提高反应器内的整体气含率。在使用喷嘴进料时,悬浮床加氢工艺选择环流反应器时流动特性更佳。Numerical simulations of different slurry bed hydrocracking reactors were carried out using Euler﹣Euler multiphase model and RNG k﹣εturbulence model. In the simulations,bubble column reactor and airlift loop reactors with different diameter of draft tube were chosen to investigate the simi﹣larities and differences in gas holdup and axial liquid velocity. The results demonstrate that liquid circu﹣lation flow is formed in all three kinds of reactors. The draft tube divides the whole flow field into riser and downcomer,located in and out of the tube,respectively and at the same time,can enlarge the liquid velocity both in riser and downcomer,the gas holdup both in the downcomer and the entire reactor. A conclusion can be drawn that airlift loop reactor is better than bubble column reactor for slurry bed hy﹣drocracking process.

关 键 词：悬浮床加氢 鼓泡床反应器 环流反应器 数值模拟 流动特性 

分 类 号：TE96[石油与天然气工程—石油机械设备]