热力发电2025，Vol.54Issue(12)：76-84,9.DOI:10.19666/j.rlfd.202508006
旋流对冲燃烧锅炉燃烧器偏转及托举风改造数值模拟研究
Numerical simulation study on burner deflection and lifting air retrofit of swirl opposed combustion boiler
LIAO Weihui 1YAO Bin 2ZHANG Cuihua 1LAI Jingnuan 1TANG Jiahong 1LYU Xingcheng 1RUAN Zhilong 1ZHANG Shan 2MA Shuai 2FANG Qingyan2
作者信息
- 1. Guangdong Honghaiwan Power Generation Co.,Ltd.,Shanwei 516000,China
- 2. School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China
- 折叠
摘要
Abstract
To address the issues of reduced combustion efficiency and increased pollution caused by the easy deposition of pulverized coal particles from lower burners of coal-fired boilers in cold ash hoppers,a CFD numerical simulation method is used to comparatively analyze the boiler combustion characteristics under the working conditions before the supplementary lifting air is applied,when the swirl burners near the side walls are deflected by 5° toward the center of the furnace,and after the supplementary lifting air is applied.The results show that after the supplementary lifting air is applied,the lifting effect on the lower pulverized coal airflow is enhanced,the deposition amount of unburned carbon particles is reduced by 30.5%,and the burnout rate is increased to 99.44%.The deflection of the burners makes the flame narrow and elongated,reduces the temperature of the side walls,but increases the CO concentration in the cold ash hopper.The supplementary lifting air reduces the CO concentration by enhancing the O₂ supply at the bottom.After the lifting air is supplemented,the air staging is significantly intensified,the reducing atmosphere in the main combustion zone is enhanced,and the NO mass concentration(standard condition)at the furnace outlet is reduced from 315.3 mg/m³ to 282.1 mg/m³.The retrofit of the burner deflection and lifting air at the bottom of the boiler can effectively regulate the pulverized coal transport path,inhibit particle sedimentation,and reduce pollutant emissions.The research results can provide a theoretical basis and engineering practice guidance for related boiler transformations.关键词
燃烧器偏转/托举风/未燃尽碳颗粒/数值模拟Key words
burner deflection/lifting air/unburned carbon particles/numerical simulation引用本文复制引用
LIAO Weihui,YAO Bin,ZHANG Cuihua,LAI Jingnuan,TANG Jiahong,LYU Xingcheng,RUAN Zhilong,ZHANG Shan,MA Shuai,FANG Qingyan..旋流对冲燃烧锅炉燃烧器偏转及托举风改造数值模拟研究[J].热力发电,2025,54(12):76-84,9.
