天然气新型气液分离器性能试验研究  

Experimental Study on the Performance of New Gas-Liquid Separator of Natural Gas

作　　者：吉雷[1] 王兴 李正贵[1] 李锐[1] JI Lei;WANG Xing;LI Zheng-gui;LI Rui(Key Laboratory of Fluid and Power Machinery,Ministry of Education,Xihua University,Chengdu,China,610039)

机构地区：[1]西华大学流体及动力机械教育部重点实验室,四川成都610039

出　　处：《热能动力工程》2020年第3期116-121,共6页Journal of Engineering for Thermal Energy and Power

摘　　要：为了解决天然气含有饱和水汽和少量烃降低输气效率、堵塞管线和设备等问题,利用旋风子、稳流元件、叶栅式分离元件、折流板式分离元件组合成新型天然气分离器。利用相位多普勒粒子分析仪对新型天然气分离器进出口粒子粒径与液态水含量的进行对比测试,以研究新型分离器的分离效率。结果表明:新型分离器具有良好的气液分离作用;在流量为10~64 m^3/h时,分离器的分离效率成抛物线形式,在33 m^3/h时分离器的分离效率降到最低值95.16%,主要原因是流量在33 m^3/h时,试验气液混合不均匀,导致内部流态紊乱,以至于试验测得分离效率相对偏低;在流量为10 m^3/h时分离器分离效率最高,为99.29%;分离器对该进口条件的气体中雾状液粒有较高的分离作用,且可以明显降低分离器出口气体中液粒的平均粒径;从进口到气相出口压力逐渐降低,总压降为950 Pa;流动区域速度梯度大不利于气液相分离,流动掺混会导致分离效率降低。Natural gas contains saturated water vapor and a small amount of hydrocarbon which reduces gas transmission efficiency and results in blockage of pipelines and equipment and other problems.To address these issues,a new natural gas separator is proposed and it is composed of cyclone,flow stabilizing element,cascade separating element and baffle separating element.The separation efficiency of the new natural gas separator is studied by comparing the particle size and liquid water content in the inlet and outlet of the new natural gas separator with the phase doppler particle analyzer.The results show that the new separator has good effect on gas-liquid separation of natural gas.In the test,when the flow is in between 10~64 m^3/h,the separation efficiency of the separator is in parabolic form.When the flow is 33 m^3/h,the separation efficiency of the separator drops to the lowest value at 95.16%.At 10 m^3/h,the maximum separation efficiency of the separator is 99.29%.The separator has a higher separation effect on the foggy liquid particles in the gas with the inlet condition,and can clearly reduce the average particle size of the liquid particles in the gas at the outlet of the separator.The pressure from the inlet to the gas phase outlet is gradually decreased,and the total pressure drop is 950 Pa.The large change of velocity gradient in the flow region adversely affects gas-liquid separation,and flow mixing will lead to the decrease of separation efficiency.

关 键 词：天然气 新型气液分离器 流场计算 多普勒粒子分析 

分 类 号：TE96[石油与天然气工程—石油机械设备]