| 摘要: |
| 目的 明确天然气净化厂脱硫系统的腐蚀影响因素，形成适应的脱硫系统腐蚀控制技术。方法 通过开展运行工况分析和腐蚀评价试验，分析了脱硫系统的腐蚀状况、影响因素及控制措施。结果 脱硫系统腐蚀严重的区域主要位于高温区域，甘氨酸和草酸根对溶液的腐蚀性影响很大，腐蚀速率最高达0.558 4 mm/a；温度在110~150 ℃时，腐蚀速率增加了1倍；通过参数控制、结构优化和材料优选，可有效控制天然气净化厂腐蚀问题。结论 天然气净化厂脱硫系统腐蚀环境恶劣，腐蚀机理复杂，基于腐蚀影响分析形成针对性的腐蚀控制措施，可控制腐蚀速率低于0.125 mm/a，确保天然气净化厂的安全平稳运行。 |
| 关键词: 天然气净化厂 腐蚀控制 脱硫系统 腐蚀速率 |
| DOI：10.3969/j.issn.1007-3426.2025.01.009 |
| 分类号: |
| 基金项目:中国石油西南油气田公司科研项目“基于风险的净化厂静设备不停机检验技术研究”（2024D106-03-01） |
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| Research and application of corrosion control technology for desulfurization system in natural gas purification plants |
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Ganghua HUANG1, Chao MIAO1, Dayong LU2, Linfeng LI3, Wenyan WU4, Jingjing JIANG1
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1.Research Institute of Natural Gas Technology, PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan, China;2.Northwestern Sichuan Gas District, PetroChina Southwest Oil & Gasfield Company, Jiangyou, Sichuan, China;3.PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan, China;4.Southwest Oil & Gas Field CDB Operating Company, Chengdu, Sichuan, China
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| Abstract: |
| Objective The aim is to clarify the corrosion influencing factors of the desulfurization system in natural gas purification plants, and form a suitable corrosion control technology for desulfurization system. Method By conducting operational condition analysis and corrosion evaluation tests, the corrosion status, influencing factors, and control measures of the desulfurization system were analyzed. Result The areas with severe corrosion in the desulfurization system were mainly located in high-temperature areas. Glycine and oxalate ions had a significant influence on the corrosion performance of the solution; the corrosion rate was up to 0.558 4 mm/a. When the temperature was between 110–150 ℃, the corrosion rate was doubled. The corrosion problem in the natural gas purification plant could be effectively controlled through parameters control, structural optimization and material preference. Conclusion The corrosion environment of the desulfurization system in natural gas purification plants is harsh, and the corrosion mechanism is complex. Based on the analysis of corrosion effects, targeted corrosion control measures are formed, which can control the corrosion rate below 0.125 mm/a and ensure the safe and stable operation of natural gas purification plants. |
| Key words: natural gas purification plant corrosion control desulfurization system corrosion rate |
