电力科技与环保2025，Vol.41Issue(3)：488-496,9.DOI:10.19944/j.eptep.1674-8069.2025.03.013
贴壁风对某650MW旋流对冲锅炉炉膛燃烧影响的数值模拟
Numerical simulation of the effect of near-wall air on the combustion of a 650 MW opposed wall-fired boiler
摘要
Abstract
[Objective]To address the high-temperature corrosion issue in the water-cooled walls of a 650 MW supercritical opposed wall-fired boiler,this study investigates the effects of different near-wall air rates on combustion characteristics,aiming to optimize corrosion resistance while controlling nitrogen oxide(NOx)emissions.[Methods]Numerical simulations were conducted to analyze the impacts of near-wall air rates(0%,1.4%,2.6%,3.8%)on furnace temperature,O2 concentration,CO concentration,and flue gas parameters.The corrosion-safe area ratio(regions with CO concentration<3%)was adopted as the evaluation criterion.[Results]The results showed that under the original condition,CO concentration near the sidewalls reached 8.5%,consistent with actual corrosion zones.Implementing near-wall air significantly reduced CO concentration;at a 2.6%air rate,over 95%of the sidewall area became corrosion-safe.Additionally,near-wall air enhanced coal combustion efficiency in the main combustion zone,reducing unburned carbon content(from 2.4%to 1.3%).However,NOx emissions increased by approximately 10 mg/m3,with lower flue gas temperature and higher oxygen levels at the furnace exit.[Conclusion]Considering anti-corrosion effectiveness,economic costs,and emission standards,a 2.6%near-wall air rate is identified as the optimal solution.It effectively mitigates high-temperature corrosion,maintains combustion stability,and balances NOx control requirements.关键词
旋流对冲锅炉/高温腐蚀/CO/贴壁风/数值计算Key words
opposed wall-fired boiler/high-temperature corrosion/CO/near-wall air/numerical calculation分类
能源科技引用本文复制引用
杭文林,潘虎,岳峻峰,黄亚继..贴壁风对某650MW旋流对冲锅炉炉膛燃烧影响的数值模拟[J].电力科技与环保,2025,41(3):488-496,9.基金项目
江苏省碳达峰碳中和创新专项(BE2022604) （BE2022604）
