电力科技与环保2025，Vol.41Issue(2)：303-311,9.DOI:10.19944/j.eptep.1674-8069.2025.02.013
330 MW燃煤机组水冷壁高温腐蚀问题研究
Research on high-temperature corrosion issues in 330 MW coal-fired boiler water walls
摘要
Abstract
[Objective]This paper addresses the issue of high-temperature corrosion of water walls in a 330 MW subcritical coal-fired boiler.[Methods]investigating the affected areas and influencing factors,and proposing effective countermeasures is to ensure the safe and economical operation of the boiler.Using CFD numericalsimulation methods,the high-temperature corrosion problem of the boiler's water walls was analyzed,and the impact of different secondary air distribution methods on the reductive and corrosive atmosphere near the water walls was studied.[Results]The study finds that the bottom of the water walls,the fire-facing side of the burner area and the backfire side of the middle area of the water walls are the areas with the highest risk of high-temperature corrosion.These areas generally have temperatures exceeding 1 400 K,reaching up to 1 800 K,with CO volume fractions exceeding 8%and H2S volume fractions exceeding 0.07%.After adopting the pagoda air distribution mode,the reductive atmosphere in the burner area and the bottom of the furnace are significantly improved,with CO volume fractions decreasing from 10%to about 4%and H2S volume fractions decreasing from 0.09%to about 0.06%.[Conclusion]The main areas where high temperature corrosion occurs in the boiler water-cooled wall are the bottom of the furnace chamber,the fire side of the burner area and the backfire side of the middle water-cooled wall area,and the use of Pagoda air distribution can significantly reduce the reducing and corrosive atmosphere in the burner area and the bottom of the furnace chamber,which can effectively reduce the risk of high-temperature corrosion.The risk of high temperature corrosion can be reduced by controlling the sulphur content below 1%(sulphur content control),optimising the combustion,and increasing the wall airflow to ensure the safe and economic operation of the boiler.关键词
燃煤锅炉/高温腐蚀/数值模拟/燃烧优化Key words
coal-fired boiler/high-temperature corrosion/numerical simulation/combustion optimization分类
能源与动力引用本文复制引用
张柏华,黄国顺,徐文龙,周冠文..330 MW燃煤机组水冷壁高温腐蚀问题研究[J].电力科技与环保,2025,41(2):303-311,9.基金项目
江苏省碳达峰碳中和科技创新专项资金项目(BE2023854) （BE2023854）
低碳智能燃煤发电与超净排放全国重点实验室开放课题(D2023FK083) （D2023FK083）
