350MW超临界四角切圆锅炉燃烧数值模拟.docx

文章编号：1008-0562(2014)01-0099-04 doi:10.3969/j.issn.1008-0562.2014.01.020 350 MW 超临界四角切圆锅炉燃烧数值模拟 王为术 1，常娜娜 1，刘 军 2，王保文 1，王纪宏 3，张雨飞 1 （1.华北水利水电大学 电力学院，河南 郑州 450011；2.浙江大学 清洁能源国家重点实验室，浙江 杭州 310027； 3.大唐林州热电有限责任公司，河南 林州 730332） 摘 要：为研究 350 MW 超临界热电联产四角切圆煤粉锅炉的炉内燃烧问题，基于 Fluent6.3 模拟软件，分析了 炉内的温度和组分分布特性.结果表明：BMCR 工况下温度在炉膛燃烧器区横截面上，低温区出现在炉膛中心， 在炉壁附近出现局部高温.在炉膛中心纵截面，沿高度、温度呈先上升后下降分布，出口温度为 1 138.11 K；炉内 O2 组分沿高度上升，CO 组分先上升后下降，CO2 组分先下降后上升.研究结果为超临界锅炉运行监测提供了可靠 的理论依据. 关键词：超临界锅炉；燃烧；数值模拟；Fluent6.3；模拟软件；分布特征 中图分类号：TH 69 文献标志码：A Study on coal combustion characteristics in a 350MW supercritical tangentially boiler WANG Weishu1, CHANG Nana1, LIU Jun3, WANG Baowen1, WANG Jihong2, ZHANG Yufei1 （1. Thermal Engineering Research Center, North China University of Water Resources and Electric Power, Zhengzhou 4500011, China; 2.Linzhou thermal power Co., Ltd of Datang. Linzhou 455561, China; 3.State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, Zhejiang, P. R. 310027 ,China） Abstract: The combustion characteristics in the furnace of 350MW supercritical combined heat and power generation tangentially boiler were numerically simulated by Fluent6.3. The temperature field and species fields were studied. The results indicate that on the cross section of the burner area in the furnace, the low temperature zone appears in the furnace’s center region of the cross section under the BMCR working condition, and the local high temperature happens near the furnace wall under the BMCR working condition. In the center longitudinal cross section of the furnace, the center temperature firstly increases with the furnace elevation increase, and then decreases. And the temperature is 1138K at the furnace outlet. The mass fraction of O2 increases with the furnace elevation increase. With increase of the furnace elevation, the mass fraction of CO firstly increases with the furnace elevation, and then decreases. Instead, the mass fraction of CO2 fi