超临界二氧化碳燃煤发电系统锅炉耐热钢选材分析  

The analysis of heat-resistant steel selection for coal-fired supercritical carbon dioxide boiler

作　　者：邢刚 郑毫楠 徐进良[2] 孙恩慧[2] 乔加飞 王兵兵 胡锐 XING Gang;ZHENG Haonan;XU Jinliang;SUN Enhui;QIAO Jiafei;WANG Bingbing;HU Rui(Guodian Power Development Co.Ltd.,Beijing 100101,China;The Beijing Key Laboratory of Multiphase Flow and Heat Transfer for Low Grade Energy Utilization(North China Electric Power University),Beijing100096,China;CHN Energy New Energy Technology Research Institute Co.,Ltd.,Beijing 10221l,China)

机构地区：[1]国电电力发展股份有限公司,北京京100101 [2]华北电力大学低品位能源多相流与传热北京市重点实验室,北京100096 [3]国家能源集团新能源技术研究院有限公司,北京102211

出　　处：《热力发电》2023年第6期157-164,共8页Thermal Power Generation

基　　金：国家能源集团科技项目(GJNY2030XDXM-19-10.1)。

摘　　要：采用超临界二氧化碳(S-CO_(2))循环时,炉膛管内工质温度较高,耐热钢钢材等级需提升。S-CO_(2)管内工质温度与壁温相差较大,远高于水蒸气锅炉30~50℃的温差范围。工程应用的水蒸气锅炉受热面选材的要求与依据,无法直接用于S-CO_(2)锅炉。在材料边界条件下,从材料的高温强度和腐蚀特性出发,综合成熟耐热材料的使用情况和经济性能,探讨将T23、T91、T92、TP347HFG、Super304H等耐热钢应用于S-CO_(2)锅炉的可行性,得到SCO_(2)锅炉的选材特点。研究结果表明:在一定管结构条件下,T91可用于冷却壁选材,传统水蒸气锅炉水冷壁管材,如12Cr1MoVG、T21和T23等铁素体耐热钢将无法使用;对于过热器,只有热强性更好的奥氏体钢TP347HFG与Super304H在一定管结构参数条件下才符合受热面选材要求。To ensure the safe and reliable operation of supercritical carbon dioxide(S-CO_(2))power plant over a long period of time,referred to the material commonly used in traditional steam boiler,the material of S-CO_(2) boiler is selected fromhigh temperature strength and corrosion characteristics.When CO_(2) flows through the boiler,the temperature of CO_(2) is high,the temperature difference between CO_(2) and tube wall temperature is large,over the 30~50℃ of steam boiler.Then the grade of the heat-resistant steel has to be upgraded.However,requirements and methods for the material selection for steam boiler cannot be directly used for S-CO_(2) boiler.The feasibility of heat-resistant steels such as T23,T91,T92,TP347HFG and Super304H used in S-CO_(2) boilers is explored from using maturity and economic performance.The results show that for cooling wall,T91 could be selected at certain tube structure,but 12Cr1MoVG,T21 and T23 et al used in steam boiler could not be selected.For superheater,only austenitic steel TP347HFG and Super304H meet the material selection requirements at certain tube structure.

关 键 词：S-CO_(2)锅炉 主蒸汽参数 铁素体/马氏体钢 奥氏体钢 镍基合金 

分 类 号：TM621.2[电气工程—电力系统及自动化] TG142.73[一般工业技术—材料科学与工程]