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Numerical and Experimental Investigation of the Decoupling Combustion Characteristics of a Burner with Flame Stabilizer

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  • Jing Wang

    (State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources, Engineering Research Center of Ministry of Education for Resource Efficiency Enhancing and Carbon Emission Reduction in Yellow River Basin, Institute of Resource and Environment Engineering, Shanxi University, Taiyuan 030006, China)

  • Jingchi Yang

    (State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources, Engineering Research Center of Ministry of Education for Resource Efficiency Enhancing and Carbon Emission Reduction in Yellow River Basin, Institute of Resource and Environment Engineering, Shanxi University, Taiyuan 030006, China)

  • Fengling Yang

    (State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources, Engineering Research Center of Ministry of Education for Resource Efficiency Enhancing and Carbon Emission Reduction in Yellow River Basin, Institute of Resource and Environment Engineering, Shanxi University, Taiyuan 030006, China)

  • Fangqin Cheng

    (State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources, Engineering Research Center of Ministry of Education for Resource Efficiency Enhancing and Carbon Emission Reduction in Yellow River Basin, Institute of Resource and Environment Engineering, Shanxi University, Taiyuan 030006, China)

Abstract

In order to integrate renewable electricity into the power grid, it is crucial for coal-fired power plant boilers to operate stably across a wide load range. Achieving steady combustion with low nitrogen oxide (NO x ) emissions poses a significant challenge for boilers burning low-volatile coal in coal-fired power plants. This study focuses on developing a decoupling combustion technology for low-volatile coal-fired boilers operating at low loads. A three-dimensional numerical simulation is employed to analyze and optimize the geometrical parameters of a burner applied in a real 300 MW pulverized coal fired boiler. Detailed analysis of the burner’s decoupling combustion characteristics, including stable combustion ability and NO x reduction principles, is conducted. The results indicate that this burner showed three stages of coal/air separation, and the flame holder facilitates the stepwise spontaneous ignition and combustion of low-volatile coal. By extending the time between coal pyrolysis and carbon combustion, the burner enhances decoupling combustion and achieves low nitrogen oxide emissions. Based on optimization, a flat partition plate without inclination demonstrates excellent performance in terms of velocity vector field distribution, coal air flow rich/lean separation, combustion, and nitrogen oxide generation. Compared with the initial structural design, the average nitrogen oxide concentration at the outlet is reduced by 59%.

Suggested Citation

  • Jing Wang & Jingchi Yang & Fengling Yang & Fangqin Cheng, 2023. "Numerical and Experimental Investigation of the Decoupling Combustion Characteristics of a Burner with Flame Stabilizer," Energies, MDPI, vol. 16(11), pages 1-20, June.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:11:p:4474-:d:1161851
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    References listed on IDEAS

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    1. Li, Zhengqi & Liu, Guangkui & Zhu, Qunyi & Chen, Zhichao & Ren, Feng, 2011. "Combustion and NOx emission characteristics of a retrofitted down-fired 660Â MWe utility boiler at different loads," Applied Energy, Elsevier, vol. 88(7), pages 2400-2406, July.
    2. Ma, Lun & Fang, Qingyan & Tan, Peng & Zhang, Cheng & Chen, Gang & Lv, Dangzhen & Duan, Xuenong & Chen, Yiping, 2016. "Effect of the separated overfire air location on the combustion optimization and NOx reduction of a 600MWe FW down-fired utility boiler with a novel combustion system," Applied Energy, Elsevier, vol. 180(C), pages 104-115.
    3. Tan, Houzhang & Niu, Yanqing & Wang, Xuebin & Xu, Tongmo & Hui, Shien, 2011. "Study of optimal pulverized coal concentration in a four-wall tangentially fired furnace," Applied Energy, Elsevier, vol. 88(4), pages 1164-1168, April.
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    Cited by:

    1. Jiajun Du & Yilong Li & Yonggang Zhao & Yaodong Da & Defu Che, 2024. "Numerical Study of Supercritical Opposed Wall-Fired Boiler Furnace Temperature and High-Temperature Heating Surface Stress under Variable Load Operation," Energies, MDPI, vol. 17(3), pages 1-21, January.
    2. Tao Sun & Qiang Zhang & Jing Ye & Rong Guo & Rongze Chen & Jianguo Chen & Rui Xiong & Jitao Zhu & Yue Cao, 2023. "Storage Optimization (r, Q) Strategy under Condition-Based Maintenance of Key Equipment of Coal-Fired Power Units in Carbon Neutrality Era," Energies, MDPI, vol. 16(14), pages 1-16, July.

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