摘要
阐述了水系统腐蚀机制,其中包括冲刷磨损,气蚀,CO_(2)、H_(2)S、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。
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 CO_(2),H_(2)S,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.
作者
刘静远
臧庆安
孙长军
张翠清
李晓峰
LIU Jingyuan;ZANG Qing'an;SUN Changjun;ZHANG Cuiqing;LI Xiaofeng(National Institution of Clean-and-Low-Carbon Energy,Beijing 102211,China;Chemical Industry Department,China Energy Investment Corporation,Beijing 100011,China;CHN Energy Xinjiang Chemical Industry Co.,Ltd.,Urumqi 831404,China)
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
2024年第1期27-37,共11页
Journal of Chinese Society For Corrosion and Protection
基金
国家能源集团科技创新项目(GJNY-22-28)。
关键词
煤气化
水系统
腐蚀
防护
coal gasification
water system
corrosion
protection
