杨宏伟,张天钰,刘方,等. 磁分离技术在天然气管道黑色粉末处理中的应用[J]. 油气储运,2025,44(6):1−10.
引用本文: 杨宏伟,张天钰,刘方,等. 磁分离技术在天然气管道黑色粉末处理中的应用[J]. 油气储运,2025,44(6):1−10.
YANG Hongwei, ZHANG Tianyu, LIU Fang, et al. Research on the application of magnetic separation technology for the removal of black powder in natural gas pipelines[J]. Oil & Gas Storage and Transportation, 2025, 44(6): 1−10.
Citation: YANG Hongwei, ZHANG Tianyu, LIU Fang, et al. Research on the application of magnetic separation technology for the removal of black powder in natural gas pipelines[J]. Oil & Gas Storage and Transportation, 2025, 44(6): 1−10.

磁分离技术在天然气管道黑色粉末处理中的应用

Research on the application of magnetic separation technology for the removal of black powder in natural gas pipelines

  • 摘要:
    目的 针对天然气管道内以磁性腐蚀产物为主的黑色粉末浓度超标,导致的过滤元件频繁堵塞与压缩机非正常停机等问题,探究将磁分离技术应用于磁性颗粒物高效分离的方法,对维护天然气管网安全稳定高效运行具有重要意义。
    方法 采用有限元仿真软件COMSOL建立磁系矩阵三维模型,利用参数化扫描技术研究不同磁系排布条件下多组磁系间的相互作用。通过设置不同磁系间距,定量分析磁系矩阵在磁分离器中不同位置处的磁场分布规律,进而优化设计磁系矩阵排布参数。设计搭建磁系分离效率测试实验平台,测试不同磁系矩阵排布参数下的分离效率并验证仿真结果。
    结果 随着磁系间距增加,磁系导磁块对应位置处的磁感应强度因同磁极相斥作用而降低,Nd-Fe-B磁体对应位置处的磁感应强度则因磁场叠加作用而增强。当磁系间距在35~85 mm范围内变化时,磁系矩阵产生的平均磁感应强度呈现先上升后下降的趋势。当采用磁系矩阵对磁性颗粒物进行捕集时,磁系矩阵的分离效率与平均磁感应强度成正比。当磁系间距为65 mm时,磁分离器内磁系磁感应强度平均值与较强磁场所覆盖的空间体积均达到相对最高值,分别为6.76×10−2 T与12.7×105 mm3,此时磁系矩阵分离效率也最高,达到80.37%,表明磁系矩阵结构参数达到最优值。
    结论 优化后的磁系矩阵可有效捕集天然气管道内磁性腐蚀产物,延长过滤分离设备的运行寿命,显著降低天然气输送场站的运维成本,具有规模化工程应用前景。

     

    Abstract:
    Objective Black powder, primarily composed of magnetic corrosion products, accumulates in natural gas pipelines, causing various issues when its concentrations exceed specific limits, including frequent blockages of filter elements and abnormal shutdowns of compressors. This paper explores methods for applying magnetic separation technology to effectively separate magnetic particles, which is significant for ensuring the safe, stable, and efficient operation of natural gas pipeline networks.
    Methods A three-dimensional model was developed using the finite element simulation software COMSOL to replicate magnetic system matrices. A parametric scanning technique was employed to investigate interactions among multiple magnetic systems under various layouts. A subsequent quantitative analysis was conducted by varying magnetic spacings to examine the magnetic field distribution patterns of the matrices at different positions within the magnetic separators. Furthermore, the results were utilized to optimize layout parameters for the magnetic system matrices. Additionally, an experimental platform was established to test the separation efficiency of the magnetic systems under different matrix layout parameters and to validate the simulation results.
    Results As the spacing of magnetic systems increased, the magnetic induction at the corresponding position of the magnetic conduction block diminished due to the repulsive effect between like poles. Conversely, the magnetic induction at the position of the Nd-Fe-B magnet increased because of the superposition of magnetic fields. When the spacing of magnetic systems varied from 35 mm to 85 mm, the average magnetic induction generated by the magnetic system matrices initially increased and then decreased. The separation efficiency of the magnetic matrices was found to be proportional to the average magnetic induction when the matrices were employed to trap magnetic particles. At a spacing of 65 mm, the average magnetic induction of the magnetic systems and the spatial volume covered by the stronger magnetic field within the magnetic separators reached their respective maxima, measuring 6.76 × 10−2 T and 12.7 × 105 mm3, which corresponded to the highest separation efficiency of the magnetic system matrix at 80.37%. These results highlight the optimal structural parameters of the magnetic system matrix.
    Conclusion The optimized magnetic matrix is effective in capturing magnetic corrosion products within natural gas pipelines, thereby extending the service life of filtration and separation equipment. This optimization contributes to a significant reduction in the operational and maintenance costs of natural gas transmission stations, making the resulting matrix promising for large-scale engineering applications.

     

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