摘要
在氢气-油体系下使用欧拉-欧拉双流体模型考察了喷嘴直径和喷嘴位置对气升式环流反应器内气-液两相流动状态的影响,为悬浮床工业装置提供理论指导。模拟结果表明:相对于喷嘴直径为40 mm和80mm时,喷嘴直径为20mm时环流动力较大,上升区和下降区的环流液速较大,而气含率改变不大;喷嘴高置时的气含率明显大于喷嘴低置和平置时,喷嘴低置和平置时的气含率相差不大,3种喷嘴位置下的环流液速由大到小的顺序为:低置>平置>高置。综合考虑,喷嘴直径为20mm和低置时的流动特性较好。
Euler-euler two flow model was applied to investigate the effect of nozzle diameter and nozzle position on the hydrodynamics in the airlift loop reactor under the oil-hydrogen system to provide theoretical guidance for suspension bed industrial equipment. The simulation results show that related to the nozzle diameters of 40 mm and 80 mm, the circulation power is larger when nozzle diameter is 20 mm; the liquid circulation velocity in the rising and dropping is larger, but the gas holdup change small. The gas holdup when the nozzle was set high location is obvious higher than the gas holdup in the horizontal and low location. There is not much difference between the horizontal and low location. The value liquid circulation velocity under three kinds of nozzle locations is：low〉 flat〉high. Comprehensive consideration, the flow characteristics is better when the nozzle diameter is 20 mm and the nozzle location is low.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2015年第9期65-70,共6页
Petroleum Processing and Petrochemicals
基金
中央高校基本科研业务基金项目(13CX02504A)
关键词
环流反应器
悬浮床加氢
喷嘴
直径
位置
loop reactor
suspended bed hydrocracking
nozzle
diameter
location
