Zhejiang Zheneng Yueqing Power Generation Co., Ltd.;Zhejiang Energy Group R&D;College of Energy Environment and Safety Engineering, China Jiliang University;
[Objective] In order to accurately simulate the wear of the heating surface of the low-temperature reheaterand the economizer at the tail of the coal-fired boiler, prolong the life of the boiler, improve the level of safe operation ofthe boiler, [Methods] in this paper, a supercritical boiler of a 600 MW unit is taken as the research object, and a one-waycoupling of the thermal combustion simulation of the boiler body and the wear simulation of the tail heating surface isproposed. 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 theaverage wear rate of the low-temperature reheater was 3.05×10-8 kg/(m~2·s), while the local maximum wear rate was1.54×10-6 kg/(m~2·s). The wear rate of the economizer is higher, with an average value of 6.65×10-8 kg/(m~2·s) and a localmaximum wear rate of 3.93×10-6 kg/(m~2·s). The windward surface wear of the first row of low temperature reheater andeconomizer is more serious and evenly distributed. The wear of the second to fourth rows of tubes is the slightest. Afterthe fifth row, the irregular wear of the side of the tube is distributed in a point shape, and the local wear rate exceeds thefirst row, mainly cutting wear. When the boiler load increases, the flue gas velocity increases, and the wear rate of theheating 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 ashcontent 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 heatingsurface of the boiler tail. When the coal ash content is high, the long-term high load operation of the boiler should beavoided, and the fineness of the pulverized coal should be appropriately increased.
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Basic Information:
DOI：10.19944/j.eptep.1674-8069.2025.02.010
China Classification Code:TM621.2
Citation Information:
[1]杨帮敏,杨威,柯永省等.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(02):270-280.DOI:10.19944/j.eptep.1674-8069.2025.02.010.
Fund Information:
国家重点研发计划项目(2022YFB4100302)