摘要
采用RNGk-ε湍流模型、欧拉-欧拉双流体模型和群体平衡模型(Population balance model,PBM),对一种中心气升式多段环流反应器的内部流场进行了数值模拟,并对反应器内导流筒分段位置进行了对比研究。结果表明,与均一粒径方法相比,采用PBM模型得到的气含率、循环液速和气泡粒径的分布规律与实验值吻合较好,可以更加准确地模拟环流反应器的流场及气泡运动规律;多段环流反应器分段位置的调整可以有效解决局部横向混合不均等问题,将分段位置下移可以提高下降区循环液速,减小气泡平均粒径,从而提高气-液分布及传质效果。
The flow in a multi-stage air-lift loop reactor was studied by numerical simulation to optimize the effect of two-phase distribution.In addition,the comparative study was done about multi-stage air-lift loop reactors with different draft tube segmentation positions.The RNG k-εturbulence model and the population balance model（PBM）were employed in the simulation.Compared with the method of using uniform bubble diameter,the simulated values of gas holdup,liquid circulation velocity and the bubble size distribution by PBM were in good agreement with experimental values,meaning that the PBM simulation was of more accurate.The problem of uneven lateral mixing could be solved by adjustment of draft tube segmentation.Moving down the segmented location could effectively improve the down comer liquid circulation velocity and decrease average bubble diameter and thus improve the gas and liquid distribution effects.
作者
左晶
王娟
王江云
毛羽
冯留海
ZUO Jing WANG Juan WANG Jiangyun MAO Yu FENG Liuhai(State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China Shaanxi Provincial Land Engineering Construction Group Co. Ltd. , Xi＇ an 719075, China)
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2016年第6期1134-1141,共8页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
中国石油大学(北京)科研基金项目(2462015YQ0303)资助
作者简介
左晶，女，硕士研究生，从事反应器内多相流动的数值模拟与实验研究
通讯联系人：王娟，女，教授，博士，从事多相流动及燃烧数值模拟与实验研究；E-mail：wangjuan@cup．edu．cn
