电力科技与环保2025，Vol.41Issue(2)：270-280,11.DOI:10.19944/j.eptep.1674-8069.2025.02.010
600 MW超临界燃煤锅炉尾部受热面磨损模拟研究
Simulation study on tail heating surface wear of 600 MW supercritical coal-fired boiler
摘要
Abstract
[Objective]In order to accurately simulate the wear of the heating surface of the low-temperature reheater and the economizer at the tail of the coal-fired boiler,prolong the life of the boiler,improve the level of safe operation of the boiler,[Methods]in this paper,a supercritical boiler of a 600 MW unit is taken as the research object,and a one-way coupling of the thermal combustion simulation of the boiler body and the wear simulation of the tail heating surface is proposed.The former is used as the calculation boundary condition of the latter,aiming to simulate a new numericalcalculation method for the wear of the heating surface at the tail of the boiler.[Results]The results showed that the average wear rate of the low-temperature reheater was 3.05×10-8 kg/(m2·s),while the local maximum wear rate was 1.54×10-6 kg/(m2·s).The wear rate of the economizer is higher,with an average value of 6.65×10-8 kg/(m2·s)and a localmaximum wear rate of 3.93×10-6 kg/(m2·s).The windward surface wear of the first row of low temperature reheater and economizer is more serious and evenly distributed.The wear of the second to fourth rows of tubes is the slightest.After the fifth row,the irregular wear of the side of the tube is distributed in a point shape,and the local wear rate exceeds the first row,mainly cutting wear.When the boiler load increases,the flue gas velocity increases,and the wear rate of the heating surface increases exponentially.When the load is reduced to 50%,the wear rate is only about 1/10 of that at fullload.When the ash content of coal increases from 10%to 20%,the wear rate increases linearly,but when the ash content further increases,the rate of increase in wear rate slows down.The thicker the pulverized coal particles,thelarger the particle size of fly ash produced by combustion,and the greater the impact wear on the pipe wall.[Conclusion]It is recommended to focus on the protection of the first row of heat exchange tubes on the heating surface of the boiler tail.When the coal ash content is high,the long-term high load operation of the boiler should be avoided,and the fineness of the pulverized coal should be appropriately increased.关键词
磨损/数值模拟/超临界锅炉/尾部受热面/计算流体力学Key words
erosion/numerical simulation/supercritical boiler/tail-end heating surfaces/computational fluid dynamics分类
能源与动力引用本文复制引用
杨帮敏,杨威,柯永省,吴剑波,陈双照,张海丹,张光学..600 MW超临界燃煤锅炉尾部受热面磨损模拟研究[J].电力科技与环保,2025,41(2):270-280,11.基金项目
国家重点研发计划项目(2022YFB4100302) （2022YFB4100302）
