内蒙古电力技术2025，Vol.43Issue(5)：86-95,10.DOI:10.19929/j.cnki.nmgdljs.2025.0067
电站锅炉炉膛热负荷分布数值模拟仿真与分析
Numerical Simulation and Analysis of Furnace Heat Load Distribution in Power Plant Boiler
摘要
Abstract
In order to better monitor the temperature condition of the heating surface and improve the efficiency and safety of the coal-fired boiler,numerical simulation method is used to analyze the effects of various factors on the heat load distribution,temperature field and velocity field for a 670 MW supercritical boiler in a power plant.The results show that in the main combustion zone,the temperature decreases with the increase of the burnout air rate.In the burnout zone,the temperature increases with the increase of the burnout air rate.When the burnout air rate increases,a large amount of incompletely burned carbon is burned in the burnout zone,and there is an increasing trend in the concentrated heat load area.In addition,the excess air coefficient is also an important index affecting the heat load distribution.The larger the excess air coefficient,the more the high temperature flame moves to the center of the furnace chamber,which makes the heat load distribution more uniform,thus reducing the local high-temperature region and lowering the thermal stress in the furnace chamber.However,the excess air coefficient is too large,which will cause a large deviation in the airflow velocity of the furnace chamber outlet,which is not conducive to the safe operation of the boiler.关键词
燃煤锅炉/数值模拟/热负荷/过量空气系数/燃尽风率Key words
coal-fired boiler/numerical simulation/heat load/excess air coefficient/burnout air rate分类
信息技术与安全科学引用本文复制引用
张志远,谢军,王召鹏,王磊,王兴,白玉宇,周林婕..电站锅炉炉膛热负荷分布数值模拟仿真与分析[J].内蒙古电力技术,2025,43(5):86-95,10.基金项目
国家重点研发计划资助项目"宽负荷超低氮煤粉燃烧中NOx生成和分布规律研究"(2024YFB4104901) （2024YFB4104901）
