煤气化水系统腐蚀与防护研究进展

doi:10.11902/1005.4537.2023.034

中国腐蚀与防护学报

2024, Vol. 44

Issue (1): 27-37 CSTR: 32134.14.1005.4537.2023.034 DOI: 10.11902/1005.4537.2023.034

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煤气化水系统腐蚀与防护研究进展

刘静远¹, 臧庆安², 孙长军³, 张翠清¹, 李晓峰¹(

)

^1.北京低碳清洁能源研究院北京 102211
^2.国家能源集团化工部北京 100011
^3.国能新疆化工有限公司乌鲁木齐 831404

Research Progress on Corrosion and Protection of Water System for Coal Gasification

LIU Jingyuan¹, ZANG Qing'an², SUN Changjun³, ZHANG Cuiqing¹, LI Xiaofeng¹(

)

^1.National Institution of Clean-and-Low-Carbon Energy, Beijing 102211, China
^2.Chemical Industry Department, China Energy Investment Corporation, Beijing 100011, China
^3.CHN Energy Xinjiang Chemical Industry Co., Ltd., Urumqi 831404, China

引用本文:

刘静远, 臧庆安, 孙长军, 张翠清, 李晓峰. 煤气化水系统腐蚀与防护研究进展[J]. 中国腐蚀与防护学报, 2024, 44(1): 27-37.
Jingyuan LIU, Qing'an ZANG, Changjun SUN, Cuiqing ZHANG, Xiaofeng LI. Research Progress on Corrosion and Protection of Water System for Coal Gasification[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(1): 27-37.

全文: PDF(2880 KB) HTML

摘要:

阐述了水系统腐蚀机制，其中包括冲刷磨损，气蚀，CO₂、H₂S、HCOOH等酸性介质引发的电化学腐蚀，Cl^-引发的氯化物应力腐蚀以及$NH^{+}_{4}$、CN^-等含氮离子引发的多重腐蚀作用，并介绍了水系统中的腐蚀易发部位。同时，从材质选择、装置/工艺设计和监测管理3方面结合煤气化装置实际调研情况，分析总结了应对腐蚀的防护措施，提出建立设备/管道腐蚀风险智能预测系统，以期为煤气化行业腐蚀现状的改进提供参考。

关键词 ：煤气化, 水系统, 腐蚀, 防护

Abstract：

As the "blood" circulatory system of coal gasification plant, the water system frequently faces corrosion and leakage problems due to the complex environment with high solid content, corrosive media and high temperature and pressure, which seriously affect the safty of production operation. The corrosion mechanism of the water system was explained, which included erosive wear, cavitation, electrochemical corrosion triggered by CO₂, H₂S, HCOOH and other acidic media, chloride stress corrosion induced by Cl^-, and multiple corrosion caused by $NH^{+}_{4}$, CN^- and other nitrogen ions. The corrosion-prone sites of the water system were also introduced. Moreover, combined with the actual research of coal gasification devices, the protective measures against corrosion were analyzed and summarized in term of the material selection, device/process design and monitoring management. Establishing an intelligent corrosion risk prediction system for equipment/pipeline was proposed. These strategies shed light on improvement of corrosion status in coal gasification industry.

Key words： coal gasification water system corrosion protection

收稿日期: 2023-02-15 32134.14.1005.4537.2023.034

ZTFLH:

TQ54

基金资助:国家能源集团科技创新项目(GJNY-22-28)

通讯作者: 李晓峰，E-mail: xiaofeng.li.an@chnenergy.com.cn，研究方向为煤化工工艺开发

Corresponding author: LI Xiaofeng, E-mail: xiaofeng.li.an@chnenergy.com.cn

作者简介: 刘静远，女，1995年生，博士

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图1 阀芯、阀座的冲刷形貌，弯管冲蚀云图，不同曲率半径弯头冲刷腐蚀速率以及阀座流道的气蚀形貌

表1 某德士古煤气化装置水系统部分设备情况

图2 多种不锈钢应力腐蚀情况与温度和Cl-含量的关系[51]

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