1000 MW超超临界机组锅炉生物质与煤粉混烧数值模拟研究Numerical Simulation of Co-firing of Coal and Biomass in a 1000 MW Ultra-s Upercritical Boiler
齐晓娟,童家麟,吕洪坤,丁历威
QI Xiaojuan,TONG Jialin,LYU Hongkun,DING Liwei
摘要(Abstract)：
针对大型燃煤电站锅炉的生物质和煤粉混烧可行性研究欠缺的问题,利用CFD软件平台,以某电厂1 000 MW超超临界四角切圆塔式煤粉锅炉作为研究对象,计算分析了不同煤粉和生物质混烧热量比对炉膛内温度场和组分浓度场的影响。计算结果表明,炉膛整体输入热量接近相同的情况下,混燃生物质后炉内温度场无明显变化;掺烧生物质后,出口处飞灰可燃物含量比单一煤粉燃烧时要低;随着生物质混烧比的增加,落入炉膛冷灰斗的渣量增加。研究结果为大型锅炉实际混烧生物质提供了理论基础。
There is a lack of feasibility study on co-firing of coal and biomass in boilers of large coal-fired power plants. The 1 000 MW ultra-supercritical tangential coal-fired boiler in a power plant is taken as a re search object, and the computational fluid dynamics(CFD) software platform is employed to calculate and analyze the effect of heat ratio of different co-fired coals and biomass on furnace temperature field and component concentration field. The result shows that there is no significant change in the temperature field in the furnace with the co-firing of biomass and the input heat the same; with the co-firing of biomass, the content of the combustible fly ash at the outlet is lower than that of the single pulverized coal. With the increase of biomass co-firing ratio, the amount of slag falling into the cold ash bucket increases. The results provide a theoretical basis for the actual mixed biomass of large boilers.
关键词(KeyWords)：
生物质;煤;超超临界;混烧;数值模拟
biomass;coal;ultra-supercritical;co-firing;numerical simulation
基金项目(Foundation):
作者(Author):
齐晓娟,童家麟,吕洪坤,丁历威
QI Xiaojuan,TONG Jialin,LYU Hongkun,DING Liwei
DOI: 10.19585/j.zjdl.201705008
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