天然气跨音速气水分离效率与旋流段长度确定  

The calculation of the transonic gas-water separation efficiency of natural gas

作　　者：王俊奇[1] 张钊[2] 徐永高[3] 

机构地区：[1]西安石油大学石油工程学院 [2]长庆油田分公司第三采油技术服务处 [3]长庆油田分公司

出　　处：《石油机械》2011年第4期11-13,93,共3页China Petroleum Machinery

基　　金：陕西省高校省级重点实验室科研项目"低渗气藏高效开发排水采气工艺技术研究"(2010JS034);陕西省自然科学基金重点项目"低渗透油藏液态气动力压裂开采方法研究"(2009JZ014)

摘　　要：天然气在喷管中从亚音速加速到跨音速状态,饱和水凝结析出,通过三角翼后产生旋流,进入旋流段,旋流段的气水分离效率是实现跨音速分离的技术关键。对液滴在旋流过程中的受力进行分析,建立并化简液滴运动方程,结合旋流过程中的压降,得出气水分离效率的计算方法和计算流程。通过分析旋流分离过程的影响因素,获得了不同分离效率下液滴直径与旋流段长度的关系。实例计算表明,随着液滴直径的增大,分离效率提高。在给定条件下,确定旋流段长度为180 mm。When natural gas is sped up from the subsonic state to the transonic state in the nozzle,the saturated water coagulates and drops out and swirl will be produced through the delta wing and the water enters the swirl segment.The gas-water separation efficiency is the technical key to the achievement of transonic separation.The force condition of the liquid droplet in the process of swirl was analyzed,and the droplet movement equation was established and simplified.Referring to the pressure drop in the process of swirl,the calculation method and scheme for gas-water separation efficiency were obtained.The relationship between the droplet diameter and the swirl segment length under different separation efficiencies was obtained through an analysis of the influencing factors in the swirl separation process.The example calculation showed that the separation efficiency increased with the increase of droplet diameter.In the given condition,the swirl segment length was determined as 180 mm.

关 键 词：天然气 跨音速 气水分离效率 旋流段 

分 类 号：TQ051.84[化学工程]