四角切圆锅炉炉膛燃烧数值模拟研究  

Numerical Simulation Study on Combustion in the Furnace of a Four-Corner Tangential Firing Boiler

作　　者：褚志海 贾凯 贾惠茹 潘志伟 徐光平 韩磊 CHU Zhihai;JIA Kai;JIA Huiru;PAN Zhiwei;XU Guangping;HAN Lei(Guoneng Yuci Thermal Power Co.,Ltd.,Jinzhong 030600,China;Beijing Zhonganjitai Technology Co.,Ltd.,Beijing 100080,China;State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]国能榆次热电有限公司,山西晋中030600 [2]北京中安吉泰科技有限公司,北京100080 [3]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《工业炉》2024年第5期21-26,共6页Industrial Furnace

基　　金：国家重点研发计划项目(2017YFB0602100)。

摘　　要：以某亚临界机组330 MW四角切圆锅炉为对象,本研究对其在113 MW、166 MW、248 MW和331 MW负荷工况下的炉内流动与燃烧进行了数值模拟。结果表明,随着负荷升高,炉内峰值流速从35.6 m/s提高至56.2 m/s;炉内中心区域形成了充满度较好的切圆,且呈现“外大内小”的速度分布特征。炉内温度场在主燃区上部达到峰值1 800 K左右,该区域壁面热流密度同样高达4.785×10^(5)W/m^(2)。该研究可为变负荷工况下炉内燃烧模拟提供参考。Taking a subcritical unit 330 MW tangential firing boiler as the object,this study numerically simulates the flow and combustion in the furnace under the load conditions of 113 MW,166 MW,248 MW,and 331 MW.The results show that with the increase of load,the peak flow velocity in the furnace increases from 35.6 m/s to 56.2 m/s;a tangential circle with good fullness is formed in the central area of the furnace,and the velocity distribution feature of"large outside and small inside"is presented.The temperature field in the furnace reaches a peak of about 1800 K in the upper part of the main combustion zone,and the heat flux density of the wall in this area is also as high as 4.785×10^(5) W/m^(2).This study can provide a reference for the combustion simulation in the furnace under the variable load condition.

关 键 词：燃烧模拟 速度分布 壁面热流密度 

分 类 号：TM621.2[电气工程—电力系统及自动化]