摘要
为适应700℃等级先进超超临界燃煤发电(700℃A-USC)机组严苛的服役环境,助力高效低碳燃煤发电技术的发展,高温合金拟被用于制造电站锅炉和汽轮机的高温构件。结合本国火电发展特点,美国、欧洲、日本、中国、印度等国家及地区先后提出并实施了具有各国特色的700℃技术研究计划。高温合金由于元素种类多、焊接难度大、产生焊接缺陷的倾向大,因此焊接技术和接头综合性能评价技术对高温构件的厂内制造、现场加工与修复以及服役安全性与完整性的影响重大。当前国内外700℃技术实际应用进展缓慢,主要原因是制造、连接、检测等技术障碍未完全解决。综述了国内外700℃技术的研究计划,并分析其发展前景,讨论了锅炉侧和汽轮机侧高温构件的选材现状,总结了当前高温合金焊接技术的现状与优缺点,分析了高温构件接头综合性能评价的关注重点,最后提出中国发展700℃技术的建议。
In order to adapt to the harsh service environment of 700℃advanced ultra-supercritical coal-fired power generation unit(700℃A-USC),and facilitate the development of high efficiency,low consumption and low carbon coal-fired power generation technology,high temperature superalloy will be used to manufacture the high-temperature components in boiler and turbine.Many countries and regions such as the United States,Europe,China,Japan and India have put forward research plans of 700℃A-USC technology with national characteristics,respectively.Due to the variety of elements,high welding difficulty,and high tendency to produce welding defects in high-temperature alloys,welding technology and weld joint comprehensive performance evaluation technology have a significant influence on the factory manufacturing,on-site processing and repair,as well as service safety and integrity of high-temperature components.The current progress in practical application of the 700℃technology at home and abroad is slow,which is mainly due to incomplete resolution of technical barriers such as manufacturing,connection,and testing.The research plans and development prospects of the 700℃A-USC technology around the world are summarized.The material selection of high temperature components including the boiler side and the turbine side is discussed.The current status,advantages and disadvantages of the welding technology for superalloy are summarized,and the critical focus points of the joint comprehensive properties evaluation technology for high temperature components are analyzed.Finally,some suggestions on developing the 700℃A-USC technology are put forward.
作者
陈碧强
刘俊峰
袁勇
黄锦阳
党莹樱
李沛
尹宏飞
刘鹏
李力敏
杨珍
周永莉
张鹏
严靖博
黄琳皓
刘恒
CHEN Biqiang;LIU Junfeng;YUAN Yong;HUANG Jinyang;DANG Yingying;LI Pei;YIN Hongfei;LIU Peng;LI Limin;YANG Zhen;ZHOU Yongli;ZHANG Peng;YAN Jingbo;HUANG Linhao;LIU Heng(National Key Laboratory of High-Efficiency Flexible Coal Power Generation and Carbon Capture Utilization and Storage,Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China)
出处
《热力发电》
CAS
CSCD
北大核心
2024年第7期1-13,共13页
Thermal Power Generation
基金
国家重点研发计划项目(2023YFB4102300)
中国华能集团有限公司科技项目(HNKJ 20-H41,HNKJ 23-H56)
西安热工研究院有限公司研发基金(TA-20-TYK03,TA-24-HJK02)。
关键词
700℃等级
燃煤发电
高温构件
选材
焊接
综合性能评价
700℃grade
coal-fired power generation
high temperature component
material selection
welding
comprehensive property evaluation
