旋流气浮装置内流动规律数值模拟  

Numerical Simulation of Flow Laws in Swirling Air Flotation Devices

作　　者：王江云[1,2,3] 魏浩然 李佳奇 杨矞琦 王娟 WANG Jiangyun;WEI Haoran;LI Jiaqi;YANG Yuqi;WANG Juan(State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China;Beijing Key Laboratory of Process Fluid Filtration and Separation,Beijing 102249,China;China University of Petroleum-Beijing at Karamay,Karamay 834000,China;Asymchem Life Science(Tianjin)Co.,Ltd.,Tianjin 300457,China)

机构地区：[1]中国石油大学(北京)重质油国家重点实验室,北京102249 [2]过程流体过滤与分离技术北京市重点实验室,北京102249 [3]中国石油大学(北京)克拉玛依校区,新疆克拉玛依834000 [4]凯莱英生命科学技术(天津)有限公司,天津300457

出　　处：《石油学报（石油加工）》2023年第3期587-598,共12页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(21106181,52104053)资助。

摘　　要：采用欧拉多相流模型对一种旋流气浮装置内多相流动过程进行了数值模拟,鉴于在实际旋流气浮装置内油滴与气泡相互碰撞并黏附形成油-气混合相的流动特点,简化油-气-水三相流动为油-气混合相和水相的两相流动,依据实际除油效率确定油-气混合相密度,并以出油口分流比来表征装置中顶部出油口排出液与总排出液的质量流量比,然后考察了操作参数对旋流气浮装置性能的影响规律。结果表明:在含油污水处理量50~120 m^(3)/h范围内,旋流气浮装置的除油效率随着含油污水处理量的减小而增大;当出油口分流比处于0.001~0.020范围内时,装置除油效率随着出油口分流比增大而增大,但顶部出油口排出液的含油质量分数降低,综合考虑发现出油口分流比为0.010~0.015时,该旋流气浮装置的除油性能较佳。Numerical simulation on the multiphase flow process in a swirling air flotation device was conducted using Euler multiphase flow model.Considering the flow characteristics of oil-gas mixture phase formed by the collision and adhesion of bubbles and oil droplets in the real swirling air flotation device,the three phase flow of oil-gas-water was simplified to two-phase flow of oil-gas mixture and water,and the density of oil-gas mixture phase was determined according to the actual oil removal efficiency.Meanwhile,the ratio of the mass flow of the discharge from top oil-outlet to that of the total discharge in the device was characterized by the oil-outlet split ratio,and then the influence of operating parameters on the performance of the swirling air flotation device was investigated.The results show that the oil removal efficiency of the device is increased with a decrease in the processing capacity of oil-polluted water within the range of 50—120 m^(3)/h of processing capacity for oil-polluted water.When the oil-outlet split ratio is between 0.001 and 0.020,the oil removal efficiency of the device is increased with an increase in the oil-outlet split ratio,but the oil mass fraction of the discharge from top oil-outlet is decreased.Based on the overall consideration,it is found that when the oil-outlet split ratio is 0.010 to 0.015,the device has good oil removal performance.

关 键 词：旋流气浮 数值模拟 除油效率 澄清效率 气浮浓缩倍数 

分 类 号：O359.1[理学—流体力学]