| 摘要: |
| 西南油气田分公司(下称公司)是四川盆地含硫天然气生产的主力军,现有在运含硫天然气净化厂13座,最大处理能力8160×104m3/d,2022年实际处理量占公司总产量的59%。公司含硫气田天然气净化厂普遍采用胺法脱硫工艺,自1965年第一套脱硫装置投运行以来,至今已积累了近60年的天然气净化技术成果和运行管理经验。针对含硫天然气净化厂的腐蚀评价和腐蚀控制,经过多年的技术攻关和生产实践,技术上取得了长足的进步,装置腐蚀得到了有效控制,基本满足了装置一年一检修情况下的稳定运行需求。“十四五”以来,围绕净化装置长周期稳定运行新目标对腐蚀控制技术提出的新挑战和生产中出现的新问题,公司开展了新一轮科技攻关和生产实践。本文综述了“十四五”以来公司含硫天然气净化厂的腐蚀控制技术进展,主要涵盖四个方面：①净化厂关键设备设施失效行为及分析方法；②脱硫溶液体系腐蚀主控因素分析及规律探究；③材料选型、工艺优化及运行参数控制等方面的腐蚀控制措施；④腐蚀监/检测技术的应用情况及成效。并结合目前生产中存在的问题以及技术发展趋势对未来进行了展望,可为国内含硫天然气净化厂的腐蚀控制及安全平稳运行乃至完整性管理提供借鉴。 |
| 关键词: 净化厂 失效 腐蚀因素 腐蚀控制 监测/检测 风险 |
| DOI： |
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| 基金项目:西南油气田分公司科技项目”净化厂硫黄回收和氧化吸收尾气处理系统关键设备腐蚀行为及控制措施研究”(编号20230306-03);“宣汉净化厂脱硫系统腐蚀跟踪评价与防护措施研究”(编号20200306-09)；“循环水系统用无磷缓蚀阻垢剂优化及推广应用”(编号20210306-09)。 |
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| Research and Application Progress of Corrosion Control Technology in Natural Gas Purification Plants- A Case Study of Southwest Oil and GasfieldJIANG Jingjing1,2, FAN Rui3, TANG Yongfan1, HUANG Ganghua1, YU Zhiming1, YE Haimu2 |
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Jiang Jingjing1, Fan Rui2, Tang Yongfan1, Huang Ganghua1, Yu Zhiming1, Ye Haimu3
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1.Research Institute of Natural Gas Technology, PetroChina Southwest Oil and Gasfield Company;2.PetroChina Southwest Oil and Gasfield Company;3.China University of Petroleum (Beijing)
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| Abstract: |
| Southwest Oil and Gas Field Company (hereinafter referred to as "the Company") is a key player in the production of sour natural gas in the Sichuan Basin. The Company currently operates 13 sour natural gas purification plants, with a maximum processing capacity of 8,160,000 m3/d. In 2022, the actual processing volume accounted for 59% of the Company’s total production. The natural gas purification plants in the Company"s sulfur-containing gas fields predominantly employ the amine desulfurization process. Since the commissioning of the first desulfurization unit in 1965, the Company has accumulated nearly 60 years of technological advancements and operational experience in natural gas purification. Over the years, significant progress has been made in evaluating and managing corrosion in sulfur-containing gas purification plants, resulting in effective corrosion control and stable operations during annual maintenance shutdowns. In line with the objectives of the 14th Five-Year Plan, the Company has launched a new round of scientific and technological research and production practices aimed at addressing emerging corrosion challenges. These efforts are driven by the need to ensure the long-term, stable operation of the purification units. This article reviews the advancements in corrosion control technology at the Company’s sulfur-containing natural gas purification plants since the implementation of the 14th Five-Year Plan. The review covers four main areas: ① Failure modes and analytical methods for key equipment and facilities in the purification plants; ② Identification of primary corrosion factors and exploration of corrosion patterns in desulfurization solution systems; ③ Corrosion control strategies focusing on material selection, process optimization, and operational parameter management; ④ The application and effectiveness of corrosion monitoring and testing technologies. Finally, based on current operational challenges and technological trends, the article provides an outlook on future developments, offering valuable insights for corrosion management, safe operation, and integrity management in domestic sulfur-containing natural gas purification plants. |
| Key words: Purification plant, Failure, Corrosion factors, Corrosion control, Monitoring/detection, Risk |
