化工学报 ›› 2023, Vol. 74 ›› Issue (3): 1042-1053.DOI: 10.11949/0438-1157.20221312

• 流体力学与传递现象 • 上一篇    下一篇

基于微波技术的天然气管道内颗粒物在线检测方法研究

陈俊先1(), 姬忠礼1(), 赵瑜2, 张倩2, 周岩2, 刘猛3, 刘震1   

  1. 1.中国石油大学(北京)机械与储运工程学院,过程流体过滤与分离技术北京市重点实验室,北京 102249
    2.北京迪威尔石油天然气技术开发有限公司,北京 100083
    3.中国石油煤层气有限责任公司,北京 102249
  • 收稿日期:2022-09-30 修回日期:2022-12-22 出版日期:2023-03-05 发布日期:2023-04-19
  • 通讯作者: 姬忠礼
  • 作者简介:陈俊先(1993—),男,博士研究生,chenjx_cup93@163.com
  • 基金资助:
    国家自然科学基金项目(51904315);中国石油天然气股份有限公司重大科技攻关项目(2019E-2505);国家重点研发计划项目(2021YFB3801304)

Study on online detection method of particulate matter in natural gas pipeline based on microwave technology

Junxian CHEN1(), Zhongli JI1(), Yu ZHAO2, Qian ZHANG2, Yan ZHOU2, Meng LIU3, Zhen LIU1   

  1. 1.Beijing Key Laboratory of Process Fluid Filtration and Separation, College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China
    2.DWELL Company Limited, Beijing 100083, China
    3.PetroChina Coalbed Methane Company Limited, Beijing 102249, China
  • Received:2022-09-30 Revised:2022-12-22 Online:2023-03-05 Published:2023-04-19
  • Contact: Zhongli JI

摘要:

针对天然气管道内颗粒物难以检测的问题,提出了一种基于微波技术的管道内颗粒物在线检测方法。首先对我国天然气管网内颗粒物进行特征分析,并基于微波测量原理以密封探针的方式实现了微波在管道中的传输;其次,采用有限元仿真软件对密封探针结构优化以及管道尺寸(两探针间距)进行研究,分析微波测量系统的电流分布规律和最优结构参数;最后,搭建实验平台,定量分析了不同工况下测量系统输出电压与颗粒物浓度的影响规律。结果表明,当管道内液滴浓度在39~210 mg/m3变化时,采用二次函数拟合测量系统输出电压与液滴浓度的关系,可决系数R2在0.966以上;各信号采样点的相对示值误差平均值在5.20%上下波动,测量系统重复性都在0.24%范围内变化。

关键词: 颗粒物, 天然气, 优化设计, 在线检测, 测量, 微波, 模拟

Abstract:

Aiming at the problem of difficult detection of particulate matter in natural gas pipeline, an online detection method for particulate matter in natural gas pipeline based on microwave technology was proposed. Firstly, the characteristics of particles in natural gas pipe network were analyzed, and based on the principle of microwave measurement, microwave transmission in the pipeline was realized by means of a sealed probe. Secondly, finite element simulation software was used to study the structure optimization of the sealing probe and pipe size (distance between two probes), and the current distribution and optimal structural parameters of the microwave measurement system were analyzed. Finally, an experimental platform was built to quantitatively analyze the influence law of the output voltage of the measuring system and the concentration of particulate matter under different working conditions. The results show that when the droplet concentration in the pipeline changes from 39 mg/m3 to 210 mg/m3, the relationship between the output voltage of the measurement system and the droplet concentration is fitted by quadratic function, and the coefficient of determination R2 is above 0.966. The average relative indication error of each signal sampling point fluctuates around 5.20%, and the repeatability of the measurement system varies within 0.24%. The research results have guiding significance for the realization of the long-term detection method of subsequent natural gas pipelines, and then ensuring the safe operation of the pipeline network.

Key words: particulate matter, natural gas, optimal design, online detection, measurement, microwave, simulation

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