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A novel burner arrangement scheme with annularly combined multiple airflows for wall-tangentially fired pulverized coal boiler

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  • Li, Zixiang
  • Qiao, Xinqi
  • Miao, Zhengqing

Abstract

To improve the performance of tangentially-fired pulverized boiler, a new burner arrangement scheme with annularly combined multiple airflows is proposed and its performance is thoroughly investigated with a previously validated 660 MW lignite boiler model. Results show that compared with conventional wall-tangentially fired boiler, the in-furnace aerodynamic field under the proposed burner arrangement scheme is obviously improved, embodying as reduced airflow deflections, increased furnace fullness and alleviated phenomenon of airflow scouring furnace walls. Besides, coal combustion behavior is also improved, resulting in increased combustion temperature and enhanced heat transfer process in the main burners’ region. Furthermore, the reduced flue gas swirling intensity mitigates the deviations of flue gas velocity and temperature in the upper furnace region, which finally lowers the unevenness of heat absorption on the suspended heating surfaces. With the improvement of the abovementioned aspects, the safety and economy of tangentially-fired boilers can be largely increased. Considering the increasingly enlarged boiler capacity and the widespread use of low-rank coal, the proposed burner arrangement scheme can be of great use in retrofitting the existing boilers and designing new ones.

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  • Li, Zixiang & Qiao, Xinqi & Miao, Zhengqing, 2021. "A novel burner arrangement scheme with annularly combined multiple airflows for wall-tangentially fired pulverized coal boiler," Energy, Elsevier, vol. 222(C).
    • Handle: RePEc:eee:energy:v:222:y:2021:i:c:s0360544221001614
    DOI: 10.1016/j.energy.2021.119912
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    References listed on IDEAS

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    1. Li, Zixiang & Miao, Zhengqing & Qiao, Xinqi, 2023. "Effects of structural parameters of a novel burner scheme with annularly combined multiple airflows on performance of a 660 MW tangentially fired boiler," Energy, Elsevier, vol. 280(C).
    2. Li, Zixiang & Miao, Zhengqing & Han, Baoju & Qiao, Xinqi, 2022. "Effects of the number of wall mounted burners on performance of a 660 MW tangentially fired lignite boiler with annularly combined multiple airflows," Energy, Elsevier, vol. 255(C).
    3. Wenshuai Wang & Mo Yang, 2024. "Numerical and Experimental Study on Nonlinear Phenomena and Thermal Deviation Control in a 1000 MW Tower-Type Boiler," Energies, MDPI, vol. 17(6), pages 1-32, March.
    4. Gu, Tianbao & Ma, Wenchao & Berning, Torsten & Guo, Zhenning & Andersson, Ronnie & Yin, Chungen, 2022. "Advanced simulation of a 750 t/d municipal solid waste grate boiler to better accommodate feedstock changes due to waste classification," Energy, Elsevier, vol. 254(PB).
    5. Wei, Daining & Zhang, Zhichao & Wu, Lining & Wang, Tao & Sun, Baomin, 2023. "Ammonia blend ratio impact on combustion characteristics and NOx emissions during co-firing with sludge and coal in a utility boiler," Energy, Elsevier, vol. 283(C).
    6. Wenshuai Wang & Mo Yang, 2024. "The Nonlinear Flow Characteristics within Two-Dimensional and Three-Dimensional Counterflow Models within Symmetrical Structures," Energies, MDPI, vol. 17(13), pages 1-24, June.
    7. Wangsong Wu & Jiajin Liu & Shuya Guo & Zhukai Zeng & Guangyao Cui & Zhongqing Yang, 2022. "Optimization Research on Burner Arrangement of Landfill Leachate Concentrate Incinerator Based on “3T+E” Principle," Energies, MDPI, vol. 15(16), pages 1-13, August.

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