浙江浙能乐清发电有限责任公司;浙江浙能技术研究院有限公司;中国计量大学能源环境与安全工程学院;
【目的】为精确模拟燃煤锅炉尾部低温再热器和省煤器的受热面磨损情况，延长锅炉寿命，提高锅炉的安全运行水平，【方法】本文以某600 MW超临界燃煤锅炉为研究对象，提出一种锅炉本体热态燃烧模拟与尾部受热面磨损模拟进行单向耦合，前者作为后者的计算边界条件，旨在模拟锅炉尾部受热面磨损情况的新型数值计算方法。【结果】研究表明，低温再热器的平均磨损率为3.05×10-8 kg/（m~2·s），然而局部最大磨损率为1.54×10-6 kg/（m~2·s）；省煤器的磨损率更高，平均值可达6.65×10-8 kg/（m~2·s），局部最大磨损率为3.93×10-6 kg/（m~2·s）；低温再热器和省煤器的第一排的迎风面磨损较为严重，且分布均匀，第2~4排换热管的磨损最轻微，第5排之后换热管侧面产生了点状分布的不规律磨损现象，局部磨损率超过了第1排，以切削磨损为主。当锅炉负荷增加时，烟气速度增加，受热面的磨损率呈现指数增大趋势。当负荷降低至50%时，磨损率仅为满负荷时的1/10左右。当煤质灰分含量由10%提高至20%时，磨损率呈线性增加趋势，但灰含量进一步增加时，磨损率增加的速度变缓。煤粉颗粒越粗，燃烧产生的飞灰粒径越大，对管壁的冲击磨损越大。【结论】建议对锅炉尾部受热面第一排换热管进行重点防护。当煤质灰份含量较高时，应避免锅炉长期高负荷运行，并适当提高煤粉细度。
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基本信息:
DOI：10.19944/j.eptep.1674-8069.2025.02.010
中图分类号:TM621.2
引用信息:
[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.
基金信息:
国家重点研发计划项目(2022YFB4100302)