Numerical simulation study on burner deflection and lifting air retrofit of swirl opposed combustion boiler

廖伟辉; 张翠华; 赖景暖; 唐嘉宏; 吕兴城; 阮志龙; 张姗; 马帅; 方庆艳; 姚斌

doi:10.19666/j.rlfd.202508006

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Numerical simulation study on burner deflection and lifting air retrofit of swirl opposed combustion boiler

更新时间：2026-01-21

- Numerical simulation study on burner deflection and lifting air retrofit of swirl opposed combustion boiler
- Thermal Power Generation Vol. 54, Issue 12, Pages: 76-84(2025)
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- DOI：10.19666/j.rlfd.202508006
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- Published：2025
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廖伟辉, 张翠华, 赖景暖, et al. Numerical simulation study on burner deflection and lifting air retrofit of swirl opposed combustion boiler[J]. Thermal Power Generation, 2025, 54(12): 76-84.
DOI：

廖伟辉, 张翠华, 赖景暖, et al. Numerical simulation study on burner deflection and lifting air retrofit of swirl opposed combustion boiler[J]. Thermal Power Generation, 2025, 54(12): 76-84. DOI： 10.19666/j.rlfd.202508006.

摘要

针对燃煤锅炉下层燃烧器煤粉颗粒易沉积于冷灰斗导致燃烧效率降低及污染加剧的问题，采用运动流体力学CFD数值模拟方法对比分析了补托举风前、靠近两侧墙的旋流燃烧器角度向炉内中心偏转5°及补托举风后工况下的锅炉燃烧特性。结果表明：补托举风后，下层煤粉气流抬升作用增强，未燃尽碳颗粒沉积量下降30.5%，燃尽率提升至99.44%。燃烧器偏转使火焰窄长化，侧墙温度降低，但冷灰斗CO体积分数升高，补托举风通过增强底部O_2供应降低CO体积分数。托举风补入后强化了空气分级，主燃区还原性气氛增强，出口NO质量浓度（标准工况）由315.3 mg/m~3降至282.1 mg/m~3。燃烧器偏转及锅炉底部托举风改造可有效调控煤粉输运路径，抑制颗粒沉降并降低污染物排放，研究结果可为锅炉相关改造提供理论依据与工程实践指导。

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