纳米高熵陶瓷涂层在超超临界1000 MW机组锅炉的防结焦耐腐蚀应用研究  

Study on anti-coking and corrosion-resistant of nano-high-entropy ceramic coating on an ultra supercritical 1000 MW unit boiler

作　　者：马军 张国山 高祥虎[2] 葛长虎 姚小军 李明 鲁种伟 赵士杰 刘宝华 董猛 姬海民 MA Jun;ZHANG Guoshan;GAO Xianghu;GE Changhu;YAO Xiaojun;LI Ming;LU Zhongwei;ZHAO Shijie;LIU Baohua;DONG Meng;JI Haimin(Gansu Power Investment Changle Power Generation Co.,Ltd.,Jiuquan 736100,China;Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Dongfang Boiler Co.,Ltd.,Dongfang Electric Corporation,Chengdu 611731,China;Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China)

机构地区：[1]甘肃电投常乐发电有限责任公司,甘肃酒泉736100 [2]中国科学院兰州化学物理研究所,甘肃兰州730000 [3]东方电气集团东方锅炉股份有限公司,四川成都611731 [4]西安热工研究院有限公司,陕西西安710054

出　　处：《热力发电》2024年第5期28-36,共9页Thermal Power Generation

基　　金：中国科学院战略性先导科技专项(XDA29020402)。

摘　　要：针对某台超超临界1000MW机组燃用准东煤锅炉水冷壁出现的沾污结渣、高温腐蚀问题,基于锅炉的燃烧煤种特性、结焦状况以及腐蚀类型,开展了纳米高熵陶瓷涂层在锅炉后墙水冷壁燃尽风区域的工程验证试验。采用宏观检查、扫描电子显微镜(scanning electron microscope,SEM)、X射线衍射(X-ray diffraction,XRD)、拉曼光谱、摩擦系数及表面能测试等方法,分析了纳米高熵陶瓷涂层的使用效果,揭示了纳米高熵陶瓷涂层的防沾污结渣、耐腐蚀机制。试验结果表明,涂层在锅炉运行11个月后完好,表面无明显结焦物、无明显腐蚀凹坑,管壁未发生明显减薄。纳米高熵陶瓷涂层能够较好地解决锅炉水冷壁沾污结渣以及高温腐蚀的问题,为燃用准东煤锅炉的安全运行提供保障。To solve the problems of fouling,slagging,and high-temperature corrosion in an ultra supercritical 1000 MW unit boiler fueled by Zhundong coal,engineering verification test of nano-high-entropy ceramic coating in separated over fire air(SOFA)area of the boiler rear water wall was carried out,based on the coal characteristics,slagging condition and corrosion type of the boiler.Several methods such as macrographic check,scanning electron microscope(SEM),X-ray diffraction(XRD),Raman spectrum,friction coefficient and surface energy test were applied to observe the change of nano-high-entropy ceramic coating before and after experiments,thus to reveal the possible slag resistance and corrosion resistance mechanisms of nano-high-entropy ceramic coating.The results show that,the coating remained intact after 11 months’boiler operation,with no obvious slagging and corrosion pits on the surface and no significantly thinning of the pipe wall.Nano-high-entropy ceramic coating can better solve the problems of fouling,slagging and high-temperature corrosion on the boiler water wall,which provides a guarantee for safe operation of the boiler fueled by Zhundong coal.

关 键 词：纳米高熵陶瓷涂层 锅炉 水冷壁 防沾污结渣 耐腐蚀 

分 类 号：TM621.2[电气工程—电力系统及自动化]