SS316L在煤炭地下气化粗煤气环境的适应性研究
Research on adaptability of SS316L as gathering pipeline material for raw gas from underground coal gasification
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- 引用格式:
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王雅熙,李林辉,陈宇,张金钟.SS316L在煤炭地下气化粗煤气环境的适应性研究[J].天然气与石油,2022,40(4):119-126.doi:10.3969/j.issn.1006-5539.2022.04.016
WANG Yaxi, LI Linhui, CHEN Yu, ZHANG Jinzhong.Research on adaptability of SS316L as gathering pipeline material for raw gas from underground coal gasification[J].Natural Gas and Oil,2022,40(4):119-126.doi:10.3969/j.issn.1006-5539.2022.04.016
- DOI:
- 10.3969/j.issn.1006-5539.2022.04.016
- 作者:
- 王雅熙1 李林辉1 陈宇2 张金钟1
WANG Yaxi1, LI Linhui1, CHEN Yu2, ZHANG Jinzhong1
- 作者单位:
- 1. 中国石油工程建设有限公司西南分公司, 四川 成都 610041; 2. 中国石油工程建设有限公司工程技术研发中心, 北京 100120
1. CPECC Southwest Company, Chengdu, Sichuan, 610041, China; 2. CPECC Engineering Technology R & D Center, Beijing, 100120, China
- 关键词:
- 煤炭地下气化;粗煤气;临氢环境;SS316L;集输系统;氯化物应力腐蚀开裂
Underground coal gasification; Raw gas; Hydrogen service; SS316L; Gathering system; Chloride stress corrosion cracking
- 摘要:
为研究SS316L在煤炭地下气化工程粗煤气集输系统高温高压临氢环境的适应性,分析了SS316L在特定工况下的腐蚀风险,指出SS316L在氢损伤和高温H2/H2S腐蚀方面目前暂无试验数据支撑,且在该工况下可能存在应力腐蚀开裂。高温H2/H2S腐蚀挂片试验显示SS316L在高温H2/H2S环境下呈均匀腐蚀,腐蚀速率较低且无明显氢损伤;通过模拟工况下的四点弯曲试验,观察到SS316L产生氯化物应力腐蚀开裂微裂纹。因此,提出SS316L主要失效风险是氯化物应力腐蚀开裂,并就材料适应性研究给出建议,可为煤炭地下气化粗煤气集输系统的选材提供参考。
To study the adaptability of SS316L as a raw gas gathering system material in high temperature and high pressure environment for underground coal gasification, corrosion risk analysis of SS316L under specific working conditions was carried out. It was highlighted that test data was not available for SS316L in terms of hydrogen damage and high temperature H2/H2S corrosion. Furthermore, elevated risk of stress corrosion cracking for SS316L should be considered under the specific working condition. High temperature H2/H2S corrosion coupon test showed that SS316L exhibited uniform corrosion under high temperature H2/H2S environment, with a low corrosion rate and no obvious hydrogen damage. Micro chloride stress corrosion cracks were observed after four-point bending test under simulated working condition. It was concluded that the major failure risk for SS316L should be chloride stress corrosion cracking, and recommendations regarding further research on gathering system material selection were given, which provided reference for selection of gathering pipeline material for raw gas from underground coal gasification.
