基于CO_(2)引起燃气联合循环电厂水汽氢电导率偏高的诊断与建议  

Diagnosis and Recommendations for Water Vapor High Cation Conductivity Caused by CO_(2)in Gas-Fired Combined Cycle Power Plant

作　　者：王宁 刘祥亮 李旭 郑志强 Wang Ning;Liu Xiangliang;Li Xu;Zheng Zhiqiang(Suzhou Yuande Hengxin Fluid System Co.,Ltd.,Jiangsu Suzhou 215000,China;China Power Huachuang(Suzhou)Electric Technology Research Co.,Ltd.,Jiangsu Suzhou 215123,China)

机构地区：[1]苏州元德恒信流体系统有限公司,江苏苏州215000 [2]中电华创(苏州)电力技术研究有限公司,江苏苏州215123

出　　处：《燃气轮机技术》2025年第1期37-41,共5页Gas Turbine Technology

摘　　要：某燃气联合循环电厂投产后出现水汽阳离子电导率大幅度超标现象,特别是低压饱和蒸汽、低压过热蒸汽。从水汽系统中可能含有的阴离子杂质种类,全面分析了阴离子腐蚀热力设备的潜在危害。通过在线表检验、离子色谱试验、补给水有机物含量检验,排除了仪表不准确,氯离子、硫酸根离子或小分子有机酸等腐蚀性阴离子超标的可能性。经除气氢电导率检验判定造成异常的主因是水汽中存在大量CO_(2)。针对电站设计、运行特性分析了CO_(2)来源,提出了处理建议,相关经验可供国内同类机组参考借鉴。After a certain gas-fired combined cycle power plant was put into operation,there was a significant excess of water vapor cation conductivity,especially for low-pressure saturated steam and low-pressure superheated steam.A comprehensive analysis was conducted on the potential hazards of anionic corrosion on thermal equipment,based on the types of anionic impurities that may be present in the water vapor system.Through online meter inspection,ion chromatography testing,and organic content testing of make-up water,the possibility of inaccurate instruments and excessive corrosive anions such as chloride ions,sulfate ions,or small molecule organic acids has been ruled out.The main cause of the abnormality determined by the degassed cation conductivity test is the presence of a large amount of CO_(2)in the water vapor.CO_(2)sources were analyzed based on the design and operational characteristics of gas-fired combined cycle power plant,and treatment suggestions were proposed.Relevant experience can be used as a reference for similar domestic units.

关 键 词：二氧化碳 除气氢电导率 水汽品质 余热锅炉 

分 类 号：TK478[动力工程及工程热物理—动力机械及工程]