天然气压气站阀门密封性能提升处理研究

Research on the Improvement Treatment of Valve Sealing Performance in Natural Gas Compressor Stations

摘要

阀门作为天然气压气站流体控制的核心部件，其密封性能直接决定站场运行安全性与输送效率。针对压气站阀门普遍存在的介质泄漏、密封件老化失效、低温工况下密封性能衰减等问题，本文结合现场运维数据与试验分析，从密封结构优化、材料选型升级、安装工艺改进及运维管控强化四个维度展开研究。通过对比不同密封材料在高压（10-12MPa）、低温（-30℃）工况下的密封性能，验证了改性聚四氟乙烯（PTFE）与镍基合金组合密封的优势；提出“预压缩量精准控制+密封面微观抛光”的安装工艺，结合在线泄漏监测系统的应用，将阀门泄漏率从0.15%降低至0.02%以下。研究结果表明，多技术协同处理可显著提升阀门密封可靠性，为天然气压气站阀门长周期稳定运行提供技术支撑。

Abstract

As a core component of fluid control in natural gas compressor stations, the sealing performance of valves directly determines the operational safety and transportation efficiency of the station. Addressing common issues such as medium leakage, aging and failure of sealing components, and degradation of sealing performance under low-temperature conditions in compressor station valves, this paper conducts research from four dimensions: optimization of sealing structure, upgrading of material selection, improvement of installation process, and strengthening of operation and maintenance management, based on field operation and maintenance data and experimental analysis. By comparing the sealing performance of different sealing materials under high-pressure (10-12 MPa) and low-temperature (-30℃) conditions, the advantages of the modified polytetrafluoroethylene (PTFE) and nickel-based alloy composite sealing are verified. A ‘precise pre-compression amount control + micro-polishing of sealing surfaces’ installation process is proposed, combined with the application of online leakage monitoring systems, reducing the valve leakage rate from 0.15% to below 0.02%. The research results show that multi-technology collaborative treatment can significantly improve the sealing reliability of valves, providing technical support for the long-term stable operation of valves in natural gas compressor stations.

关键词

天然气压气站 / 阀门密封 / 材料升级 / 工艺优化 / 泄漏控制

Key words

Natural Gas Compressor Station / Valve Sealing / Material Upgrade / Process Optimization / Leakage Control

参考文献

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