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过程工程学报 ›› 2019, Vol. 19 ›› Issue (5): 982-988.DOI: 10.12034/j.issn.1009-606X.219105

• 反应与分离 • 上一篇    下一篇

溢流管结构对天然气水合物用旋流器分离性能的影响

王党飞1, 王国荣1*, 邱顺佐1, 钟 林1, 周守为2,4, 刘清友3   

  1. 1. 西南石油大学机电工程学院,四川 成都 610500 
    2. 中国海洋石油总公司,北京 100010 
    3. 成都理工大学油气藏地质及开发工程国家重点实验室,四川 成都 610059 
    4. 西南石油大学油气藏地质及开发工程国家重点实验室,四川 成都 610500
  • 收稿日期:2019-01-06 修回日期:2019-02-28 出版日期:2019-10-22 发布日期:2019-10-22
  • 通讯作者: 王国荣
  • 基金资助:
    国家重点研发计划资助项目;国家重点研发计划资助项目;中国工程院战略咨询项目

Effect of vortex finder structure on the separation performance of hydrocyclone for natural gas hydrate

Dangfei WANG1, Guorong WANG1*, Shunzuo QIU1, Lin ZHONG1, Shouwei ZHOU2,4, Qingyou LIU3   

  1. 1. College of Mechatronic Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China 
    2. China National Offshore Oil Corporation, Beijing 100010, China 
    3. State Key Laboratory of Oil and Gas Reservoir Geology and Development Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China 4. State Key Laboratory of Oil and Gas Reservoir Geology and Development Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • Received:2019-01-06 Revised:2019-02-28 Online:2019-10-22 Published:2019-10-22

摘要: 建立了主直径100 mm的旋流器模型,采用计算流体力学(CFD)方法研究了溢流管内径、插入深度及壁厚对旋流器分离天然气水合物性能的影响规律。结果表明,入口流速为9 m/s时,随溢流管内径增大,水合物分离效率增大,砂的分离效率降低,旋流器的压力降逐渐减小;随溢流管壁厚增大,水合物和砂的分离效率稍有增大,旋流器的压力降先增大后减小;随溢流管插入深度增大,水合物分离效率先减小后增大,砂的分离效率先增大后减小,旋流器的压力降波动较小。溢流管内径对旋流器分离天然气水合物性能的影响最大,插入深度次之,壁厚的影响最小。

关键词: 旋流器, 溢流管, 内径, 壁厚, 插入深度, 分离效率, 压力降

Abstract: In the view of the problems of pipeline jam,tools erosion and high energy consumption in pipeline transportation caused by the slurry with high content of sand in the process of the solid fluidized mining for the non-diagenetic natural gas hydrate in the shallow seabed, the downhole hydrocyclone has been designed for in-situ desanding and purification of hydrate slurry. The vortex finder is an important structure of hydrocyclone, which greatly affects the separation performance of the hydrocyclone. The hydrocyclone model with nominal diameter of 100 mm and computational fluid dynamics (CFD) numerical method were used to study the influence of vortex finder structure on separation performance of hydrocyclone. The results showed that under the condition of 9 m/s inlet flow rate, the separation efficiency of gas hydrate increased with inner diameter, on the contrary, the separation efficiency of sand decreased. The pressure drop of hydrocyclone decreased gradually with the increase of inner diameter. The separation efficiencies of gas hydrate and sand increased slightly with wall thickness, while the pressure drop of hydrocyclone increased firstly and then decreased with the increase of wall thickness. It was concluded that the separation efficiency of gas hydrate decreased firstly and then increased, while the separation efficiency of sand increased firstly and then decreased, and the pressure drop of hydrocyclone had been less affected. The inner diameter had the greatest influence on the separation performance of hydrocyclone for gas hydrate, followed by the insertion depth of vortex finder, and the wall thickness of overflow tube had the least influence on the separation performance of hydrocyclone. The research work had certain guiding significance for the field application of hydrocyclone in gas hydrate exploitation.

Key words: hydrocyclone, overflow tube, inner diameter, wall thickness, insertion depth, separation efficiency, pressure drop