700MW锅炉炉内煤粉切圆燃烧过程的数值分析  

Numerical Simulation of Coal Tangentially-fired Combustion Process in 700MW Boiler

作　　者：谭灿燊[1] 吴阿峰[1] 

机构地区：[1]广东省电力设计研究院,广东广州510600

出　　处：《现代电力》2008年第5期44-47,共4页Modern Electric Power

摘　　要：综合考虑了煤粉燃烧过程涉及到的基本模型,对三菱公司生产的MB-FRR型锅炉(最大连续蒸发量为2 290t/h)的3种燃烧工况(100%、75%、50%)进行了数值模拟,并将模拟得到的炉膛内的速度场和温度场的分布与锅炉试验实测数据进行了分析比较。另外,重点对锅炉负荷降低后的炉内温度场变化进行分析,发现随着负荷的降低,在燃烬风喷射区域等温线会向炉膛中心轴线收缩,炉内的高温区域会有所缩小。提出了优化燃烧的方法,这对于切向燃烧锅炉的设计和运行具有一定的参考价值。Taking all the models associated with pulverized coal combustion process into account, three different combustion conditions of 100%, 75%and 50% of full load are simulated in a Mitsubishi MB-FRR boiler. The velocity and temperature distribution of prediction are compared with of the plant data, and they are in good match. More importance is attached to the change of temperature distribution after the load of the boiler falls. A practical method is proposed for combustion optimization, which is useful for the design and running of tangentially-fired combustion boiler.

关 键 词：切圆燃烧 煤粉燃烧 多相流动 数值模拟 

分 类 号：TK16[动力工程及工程热物理—热能工程]