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Influence of division cone angles between the fuel-rich and the fuel-lean ducts on gas–particle flow and combustion near swirl burners

Author

Listed:
  • Qi, L.Z.
  • ZhiXin, W.
  • Rui, S.
  • ShaoZeng, S.
  • LiZhe, C.
  • ShaoHua, W.
  • YuKun, Q.

Abstract

Radial bias combustion pulverized coal swirl burners are used in boilers when burning low-grade coals, which are often low-volatility anthracite and lean coals that do not burn stably. In a gas–particle test facility, a three-dimensional particle-dynamics anemometer was used to measure gas–particle flows in the near-burner region. Division cones between the fuel-rich and the fuel-lean ducts of the burner were set at angles of 43.2° and 0°. Velocity and particle volume flux profiles were obtained and the influence of the cones on combustion was analyzed. Burners with a division cone angle of 43.2° were used in a lean-coal fired boiler (volatility 13.2% as received, ash 27.46% as received), rated at 670 t/h. Pulverized coal was conveyed by cold moisture-laden exhaust air from the pulverizer. In situ aerodynamic field measurements in cold state were made and combustion tests were carried out. Low NOx emission and high thermal efficiency resulted and the turn-down ratio was 50%.

Suggested Citation

  • Qi, L.Z. & ZhiXin, W. & Rui, S. & ShaoZeng, S. & LiZhe, C. & ShaoHua, W. & YuKun, Q., 2002. "Influence of division cone angles between the fuel-rich and the fuel-lean ducts on gas–particle flow and combustion near swirl burners," Energy, Elsevier, vol. 27(12), pages 1119-1130.
    • Handle: RePEc:eee:energy:v:27:y:2002:i:12:p:1119-1130
    DOI: 10.1016/S0360-5442(02)00083-X
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    Cited by:

    1. 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.
    2. Fang, Neng & Li, Zhengqi & Wang, Jiaquan & Zhang, Bin & Zeng, Lingyan & Chen, Zhichao & Wang, Haopeng & Liu, Xiaoying & Zhang, Xiaoyan, 2018. "Experimental investigations on air/particle flow characteristics in a 2000 t/d GSP pulverized coal gasifier with an improved burner," Energy, Elsevier, vol. 165(PB), pages 432-441.
    3. Fan, Weidong & Lin, Zhengchun & Li, Youyi & Zhang, Mingchuan, 2010. "Experimental flow field characteristics of OFA for large-angle counter flow of fuel-rich jet combustion technology," Applied Energy, Elsevier, vol. 87(8), pages 2737-2745, August.
    4. Jing, Jianping & Li, Zhengqi & Wang, Lin & Chen, Lizhe & Yang, Guohua, 2011. "Influence of secondary air mass flow rates on gas/particle flow characteristics near the swirl burner region," Energy, Elsevier, vol. 36(5), pages 3599-3605.
    5. Ren, Feng & Li, Zhengqi & Liu, Guangkui & Chen, Zhichao & Zhu, Qunyi, 2011. "Combustion and NOx emissions characteristics of a down-fired 660-MWe utility boiler retro-fitted with air-surrounding-fuel concept," Energy, Elsevier, vol. 36(1), pages 70-77.
    6. Jing, Jianping & Li, Zhengqi & Zhu, Qunyi & Chen, Zhichao & Wang, Lin & Chen, Lizhe, 2011. "Influence of the outer secondary air vane angle on the gas/particle flow characteristics near the double swirl flow burner region," Energy, Elsevier, vol. 36(1), pages 258-267.
    7. Zeng, Lingyan & Li, Zhengqi & Zhao, Guangbo & Li, Jing & Zhang, Fucheng & Shen, Shanping & Chen, Lizhe, 2011. "The influence of swirl burner structure on the gas/particle flow characteristics," Energy, Elsevier, vol. 36(10), pages 6184-6194.

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