双搅拌高效澄清萃取槽澄清室流动特性的数值模拟  

Numerical Simulation on Fluid Flow Characteristics of the Settler in High Efficient Clarification and Extraction Tank with Double Stirring

作　　者：吕超[1] 张子木[1] 赵秋月[1] 张廷安[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2014年第11期1570-1573,1578,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51204040;U1202274);国家高技术研究发展计划项目(2010AA03A405);国家科技支撑计划项目(2012BAE01B02)

摘　　要：利用商用CFD软件FLUENT 12.0,采用Eulerian多相流模型及Morsi-Alexander相间曳力系数模型耦合,对新型双搅拌澄清萃取槽澄清室流体流动特性进行数值模拟.结果表明:澄清室增加搅拌能有效缩短分散带厚度的稳定时间,能降低水相出口油相夹带值,能加速油、水两相的澄清分离.数值模拟得到的澄清室水相速度矢量图与PIV实测得到的速度矢量图趋势保持一致,进一步说明澄清室内加搅拌能有效抑制回流,提高油、水两相分离效率.On the base of commercial CFD software FLUENT 12. 0, the fluid flow characteristics of the settler in high efficient clarification and extraction tank with double stirring were simulated numerically by using Eulerian multiphase flow model and Morsi-Alexander model. The results showed that the settler with stirring can effectively reduce dispersion band thickness, which make the stable time of dispersion band thickness shorter than that without stirring, and can reduce the oil content in water phase at outlet, and it shows that the appropriate stirring can accelerate the separation process for clarification. Numerical simulation result of water phase velocity vector is the same with the velocity vector measured by PIV, which further confirms that the stirring can inhibit backflow and enhance two-phase separation.

关 键 词：高效萃取槽 双搅拌 PIV 数值模拟 流动特性 

分 类 号：TQ027.35[化学工程]