天然气净化厂脱硫系统腐蚀控制技术研究与应用  

Research and application of corrosion control technology for desulfurization system in natural gas purification plants

作　　者：黄刚华 苗超 鲁大勇 李林峰[3] 吴文炎 江晶晶 HUANG Ganghua;MIAO Chao;LU Dayong;LI Linfeng;WU Wenyan;JIANG Jingjing(Research Institute of Natural Gas Technology,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan,China;Northwestern Sichuan Gas District,PetroChina Southwest Oil&Gasfield Company,Jiangyou,Sichuan,China;PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan,China;Southwest Oil&Gas Field CDB Operating Company,Chengdu,Sichuan,China)

机构地区：[1]中国石油西南油气田公司天然气研究院 [2]中国石油西南油气田公司川西北气矿 [3]中国石油西南油气田公司 [4]中国石油西南油气田公司川东北作业分公司

出　　处：《石油与天然气化工》2025年第1期63-68,共6页Chemical engineering of oil & gas

基　　金：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)。

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0.5584 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。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 0.5584 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.

关 键 词：天然气净化厂 腐蚀控制 脱硫系统 腐蚀速率 

分 类 号：TE986[石油与天然气工程—石油机械设备]