Leckner Model-based Analysis of Ammonia-Coal Co-firing: Effect of High H<sub>2</sub>O Concentration Flue Gas on Heat Transfer Characteristics in Coal-fired Boilers

ZHANG Haowei; CUI Liqun; ZHAO Xiuliang; ZHANG Wenzhen; LI Chi; LIU Xin; ZHANG Yufeng; CUI Liming; ZHU Xingchen; CHEN Liang

doi:10.19805/j.cnki.jcspe.2026.250384

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Leckner Model-based Analysis of Ammonia-Coal Co-firing: Effect of High H₂O Concentration Flue Gas on Heat Transfer Characteristics in Coal-fired Boilers

更新时间：2026-09-15

- Leckner Model-based Analysis of Ammonia-Coal Co-firing: Effect of High H₂O Concentration Flue Gas on Heat Transfer Characteristics in Coal-fired Boilers
- Chinese Journal of Power Engineering Vol. 46, Issue 9, Pages: 15-25(2026)
- 作者机构：
  
  1. 华北电力大学燕赵电力实验室,河北,保定,071000
  2. 国家能源投资集团有限责任公司,北京,100010
  3. 国家能源集团广东电力有限公司,广东,广州,510630
  4. 烟台龙源电力技术股份有限公司,山东,烟台,264006
  5. 中国神华能源股份有限公司,北京,100010
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2026.250384
  CLC： TK224.1
- Published：2026
- 稿件说明：
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张皓玮, 崔利群, 赵秀良, 张文振, 李驰, 刘欣, 张玉锋, 崔立明, 朱星晨, 陈亮. 基于Leckner模型的氨掺烧高水蒸气浓度烟气对燃煤锅炉传热特性的影响分析[J]. 动力工程学报, 2026, 46(9): 15-25.
张皓玮, 崔利群, 赵秀良, 张文振, 李驰, 刘欣, 张玉锋, 崔立明, 朱星晨, 陈亮. 基于Leckner模型的氨掺烧高水蒸气浓度烟气对燃煤锅炉传热特性的影响分析[J]. 动力工程学报, 2026, 46(9): 15-25. DOI： 10.19805/j.cnki.jcspe.2026.250384.

DOI： 10.19805/j.cnki.jcspe.2026.250384

摘要

燃煤锅炉掺氨燃烧会显著改变烟气组成及锅炉传热特性，但掺氨燃烧导致的高水蒸气浓度对烟气辐射特性的影响尚不明确。基于Leckner辐射模型，计算了高水蒸气浓度燃煤烟气的辐射特性，并研究50%~100%负荷下，0~60%热值比掺氨对某600 MW亚临界锅炉受热面传热的影响。结果表明：掺氨20%~60%时，由于烟气飞灰和焦炭颗粒浓度大幅下降15.9%~72%，同时绝热燃烧温度降低47~133 K，炉膛辐射传热功率下降3.3%~9.8%；掺氨后烟气流量增加4%~12%，对流传热增强，主、再热蒸汽呈现超温趋势；将燃烧器摆角下调6°~19°可使主、再热蒸汽温度恢复至设计值；60%掺氨时，排烟温度升高11.6~13.1 K，锅炉效率下降0.9%~1.1%。研究结果可为燃煤锅炉大比例掺氨运行及传热调控提供理论依据。

Abstract

Ammonia co-firing in coal-fired boilers significantly alters the flue gas composition and heat transfer characteristics of the boilers

but its effect on the radiative properties of flue gas remains unclear. Based on the Leckner radiation model

the radiative properties of coal-fired flue gas with high water vapor concentration were calculated

and the influence of ammonia co-firing at 0-60% thermal ratio on heat transfer of the heating surfaces in a 600 MW subcritical boiler under 50%-100% load was investigated. Results show that at 20%-60% ammonia co-firing ratio

the concentrations of fly ash and char particles in the flue gas decrease substantially by 15.9%-72%

while the adiabatic combustion temperature drops by 47-133 K

resulting in a 3.3%-9.8% reduction in furnace radiative heat transfer power. After ammonia co-firing

the flue gas flow rate increases by 4%-12%

enhancing convective heat transfer and causing an overtemperature trend in the primary and reheat steam. By lowering the burner tilt angle by 6°-19°

the primary and reheat steam temperatures can be restored to the design values. At 60% ammonia co-firing ratio

the exhausted gas temperature increases by 11.6-13.1 K

and the boiler efficiency decreases by 0.9%-1.1%. The findings provide a theoretical basis for large-ratio ammonia co-firing operation and heat transfer regulation in coal-fired boilers.

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AI问答

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Leckner Model-based Analysis of Ammonia-Coal Co-firing: Effect of High H2O Concentration Flue Gas on Heat Transfer Characteristics in Coal-fired Boilers

DOI：10.19805/j.cnki.jcspe.2026.250384

摘要

Abstract

关键词

Keywords

references

Leckner Model-based Analysis of Ammonia-Coal Co-firing: Effect of High H₂O Concentration Flue Gas on Heat Transfer Characteristics in Coal-fired Boilers