内联式脱液器导叶几何参数优化的数值研究  

Numerical study on the geometry parametric optimization of guide vane of inline deliquidiser

作　　者：卫德强[1] 俞接成[1] 张富成[1] 苏民德 

机构地区：[1]北京石油化工学院机械工程学院,北京102617 [2]北京南光石油化工有限公司,北京100600

出　　处：《水动力学研究与进展（A辑）》2016年第3期320-326,共7页Chinese Journal of Hydrodynamics

基　　金："十三五"国家科技重大专项"大型油气田及煤层气开发"子课题(2016ZX05032-006-002)~~

摘　　要：对于低含液浓度的气液两相流,内联式脱液器具有良好的分离性能,导流叶片的几何尺寸是影响内联式脱液器分离性能的重要因素。该文借助ANSYS FLUENT软件,在建立稳定可靠计算模型的基础上,分析了不同导叶个数(6、8和10个)及导叶出口角(25°、30°、40°、45°、50°和55°)对内联式脱液器气液分离性能的影响。数值模拟结果表明:在稀相时,8个导叶的内联式脱液器分离效果最好;在一定条件下,内联式脱液器的分离效率随导叶出口角度的增大而增大,其中当液滴粒径大于30mm且导叶出口角度为45°时,分离效率已接近98%,此时再增大导叶出口角度对分离效率提升并不大,反而会增加压能损失,消耗能量;同时研究还发现当导叶出口角度一定时,脱液器的气体进出口压降随入口速度的增大呈抛物线上升,与局部压降公式吻合,且可以用能量损耗系数K表征内联式脱液器单元运行过程中的能量损耗。For the low-concentration gas-liquid flow, the inline deliquidiser has a good separation performance. The geometry of guide vane was the important factor affecting the separation performance of inline deliquidiser. Based on the steady and reliable computational model, studies on separation performance of the inline deliquidiser with the numbers of guide vane of 6, 8 and 10, and the outlet angles of guide vane of 25°, 30°, 40°, 45°, 50° and 55° were conducted by the ANSYS FLUENT software. The numerical simulation results show that the separation efficiency of guide vane with number of 8 was the highest one in the dilute flow. When the liquid content remains constant, the separation efficiency of inline deliquidiser increases with the increase of guide vane angle. But the separation efficiency of guide vane with angle of 45° exceeds 98% when the diameter of droplets was larger than 30 μm, at which with increase of guide vane angle not useful for separation efficiency, it will improve the pressure drop and. waste energy on the contrary. The studies also indicate that the pressure drop of inline deliquidiser with a certain guide vane angle rises at a parabola line with the increase of flow velocity, which matches with the local pressure drop formula. At the same time, the energy loss of the inline deliquidiser in the process of operation can be characterized by the energy loss coefficient K.

关 键 词：内联式脱液器 导叶 出口角度 分离效率 压降损失 

分 类 号：TQ645[化学工程—精细化工]