Numerical simulation of the effect of near-wall air on the combustion of a 650 MW opposed wall-fired boiler

HANG Wenlin; PAN Hu; YUE Junfeng; HUANG Yaji

doi:10.19944/j.eptep.1674-8069.2025.03.013

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Numerical simulation of the effect of near-wall air on the combustion of a 650 MW opposed wall-fired boiler

Environmental technology | 更新时间：2026-10-14

- Numerical simulation of the effect of near-wall air on the combustion of a 650 MW opposed wall-fired boiler
- Electric Power Technology and Environmental Protection Vol. 41, Issue 3, Pages: 488-496(2025)
- 作者机构：
  
  1.江苏国信扬州发电有限责任公司，江苏扬州 225131
  2.能源热转换及其过程测控教育部重点实验室（东南大学），江苏南京 210096
  3.江苏方天电力技术有限公司，江苏南京 211102
- 作者简介：
- 基金信息：
- DOI：10.19944/j.eptep.1674-8069.2025.03.013
  CLC： TK229.6
- Received：17 February 2025，
  
  Accepted：10 May 2025，
  
  Published：15 June 2025
- 稿件说明：
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杭文林,潘虎,岳峻峰，等.贴壁风对某650 MW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.

HANG Wenlin, PAN Hu, YUE Junfeng, et al. Numerical simulation of the effect of near-wall air on the combustion of a 650 MW opposed wall-fired boiler[J]. Electric Power Technology and Environmental Protection, 2025, 41(3):488-496.
杭文林,潘虎,岳峻峰，等.贴壁风对某650 MW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. DOI： 10.19944/j.eptep.1674-8069.2025.03.013.

HANG Wenlin, PAN Hu, YUE Junfeng, et al. Numerical simulation of the effect of near-wall air on the combustion of a 650 MW opposed wall-fired boiler[J]. Electric Power Technology and Environmental Protection, 2025, 41(3):488-496. DOI： 10.19944/j.eptep.1674-8069.2025.03.013.

摘要

目的

针对某650 MW超临界旋流对冲锅炉水冷壁的高温腐蚀问题，研究不同贴壁风率对炉膛燃烧特性的影响，以优化防腐效果并控制NO

排放。

方法

本文以某650 MW超临界旋流对冲锅炉炉膛为研究对象，通过数值模拟方法，分析0%、1.4%、2.6%、3.8%不同贴壁风率对炉膛内的温度、O₂浓度、CO浓度及出口烟气参数的影响，CO浓度≥3%的区域占比为高温腐蚀面积比，作为本文评价指标。

结果

模拟结果表明，原始工况下侧墙冷灰斗至燃尽风区域的CO浓度高达8.5%，与实际腐蚀区域吻合。通过在侧墙加装不同风率的贴壁风系统，发现适量的贴壁风能够显著降低近壁面CO浓度，减少高温腐蚀区域，2.6%贴壁风率下腐蚀安全区域（CO

3%）占比超95%，有效缓解高温腐蚀。同时，加装贴壁风系统有利于主燃区煤粉的充分燃烧，降低炉膛出口的未燃尽碳比例，从2.4%降至1.4%，但NO

排放增加约6.0 mg/m³，出口烟温下降，氧量上升。

结论

综合考虑防腐效果、改造成本及排放限制，2.6%的贴壁风率为最优方案，可在保证燃烧稳定性的同时显著减少高温腐蚀，并平衡NO

控制需求。

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 (NO

) 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

concentration

CO concentration

and flue gas parameters. The corrosion-safe area ratio (regions with CO concentration

3%) was adopted as the evaluation crite

rion.

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

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 NO

control requirements.

关键词

Keywords

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