同向出流气液分离器流场分析及结构参数优选

为解决常见的气液分离器气相出口含液量大和管汇连接复杂等问题,提出了一种新型同向出流式气液旋流分离装置。该装置能有效降低气相出口的液相含量,主要针对其不同结构参数开展了数值模拟及试验研究,并完成了结构参数的优选。研究结果表明:影响气相运移速度及分离性能的最佳内锥角度为2°,最佳进气孔角度为30°,最佳脱气效率模拟值为96%;随着内锥角度的增大,气相溢流管内的轴向速度呈先上升后下降的规律,内锥角度为2°时,轴向速度最大达到0.58 m/s;随着进气孔角度的增大,气相溢流管内的轴向速度基本呈上升规律,进气孔角度为30°,轴向速度最大达到0.60 m/s;优化后的气液分离器结构适用于含气体积分数区间为15%~30%,最佳分离效率为92.6%。研究结果可为同向出流气液分离器的工程应用提供理论指导。

Flow Field Analysis and Parameters Optimization of a Co-Rotating Outflow Gas-Liquid Separation Hydrocyclone

To address the problems of large liquid content in gas phase outlet of gas-liquid separator and complicated connection of manifolds,a new type of co-current flow-type gas-liquid hydrocyclone separation device is proposed,which can effectively reduce the liquid phase content of gas phase outlet.The numerical simulation and experimental research has been conducted for its different structural parameters to optimize the structural parameters.The results show that the optimal inner cone angle affecting the gas phase migration speed and separation performance is 2°.The optimal air inlet angle is 30°,and the optimal degassing efficiency is 96%.With the increase of the inner cone angle,the axial velocity in gas phase overflow pipe increases first and then decrease.The maximum axial velocity up to 0.58 m/s is observed with the inner cone angle of 2°.With the increase of the inlet hole angle,the axial velocity in the gas-phase overflow pipe is basically rising.The maximum axial velocity up to 0.60 m/s is obtained with the inlet hole angle of 30°.The optimized gas-liquid separator structure can be applied to the gas volume range of 15%~30%,and the optimum separation efficiency is 92.6%.The study results can provide theoretical guidance for the engineering application of the co-rotating outflow gas-liquid separation hydrocyclone.