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Bituminous coal combustion in a full-scale start-up ignition burner: Influence of the excess air ratio

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  • Liu, Chunlong
  • Li, Zhengqi
  • Kong, Weiguang
  • Zhao, Yang
  • Chen, Zhichao

Abstract

A start-up ignition burner has been proposed to reduce oil fuel consumption during the firing-up process and partial-load operation. To investigate the influence of different excess air ratios on bituminous coal combustion in the start-up ignition burner, full-scale reacting-flow experiments were performed for an experiment setup. The ignition burner was identical to that normally used in an 800 MWe utility boiler. Gas temperature distributions in the burner were obtained for excess air ratios of 0.56, 0.75, 0.98 and 1.14 (corresponding to primary air velocities of 17, 23, 30 and 35 m/s). Coal burnout and the release of C and H were observed at the exit of the burner nozzle. Gases such as O2 and CO were measured at the center of the burner. A change in resistance was obtained within the burner.

Suggested Citation

  • Liu, Chunlong & Li, Zhengqi & Kong, Weiguang & Zhao, Yang & Chen, Zhichao, 2010. "Bituminous coal combustion in a full-scale start-up ignition burner: Influence of the excess air ratio," Energy, Elsevier, vol. 35(10), pages 4102-4106.
    • Handle: RePEc:eee:energy:v:35:y:2010:i:10:p:4102-4106
    DOI: 10.1016/j.energy.2010.06.023
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    References listed on IDEAS

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    Cited by:

    1. Zeng, Guang & Xu, Mingchen & Tu, Yaojie & Li, Zhenwei & Cai, Yongtie & Zheng, Zhimin & Tay, Kunlin & Yang, Wenming, 2020. "Influences of initial coal concentration on ignition behaviors of low-NOx bias combustion technology," Applied Energy, Elsevier, vol. 278(C).
    2. Li, Zixiang & Miao, Zhengqing & Shen, Xusheng & Li, Jiangtao, 2018. "Effects of momentum ratio and velocity difference on combustion performance in lignite-fired pulverized boiler," Energy, Elsevier, vol. 165(PA), pages 825-839.
    3. Wang, Qingxiang & Chen, Zhichao & Li, Liankai & Zeng, Lingyan & Li, Zhengqi, 2020. "Achievement in ultra-low-load combustion stability for an anthracite- and down-fired boiler after applying novel swirl burners: From laboratory experiments to industrial applications," Energy, Elsevier, vol. 192(C).
    4. Dios, M. & Souto, J.A. & Casares, J.J., 2013. "Experimental development of CO2, SO2 and NOx emission factors for mixed lignite and subbituminous coal-fired power plant," Energy, Elsevier, vol. 53(C), pages 40-51.

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