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The influence of swirl burner structure on the gas/particle flow characteristics

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  • Zeng, Lingyan
  • Li, Zhengqi
  • Zhao, Guangbo
  • Li, Jing
  • Zhang, Fucheng
  • Shen, Shanping
  • Chen, Lizhe

Abstract

Improvements were made to a low-NOx axial swirl burner (LNASB), aimed at mitigating slagging in a 600-MWe boiler burning bituminous coal. The new design is referred to as improved low-NOx axial swirl burner (ILNASB). This paper describes investigations of the influence of swirl burner structure on the gas/particle flow characteristics using a three-dimensional particle-dynamics anemometer. In comparing results from both ILNASB and LNASB, a central recirculation zone is seen to form in the region x/d = 0.1–0.3 within the ILNASB. This zone had shifted from the region between primary and secondary air in LNASB to a region between inner and outer secondary air. In the vicinity of the burner outlet, particle volume flux is reduced significantly in the central recirculation zone. In contrast, this flux is high near the central axis in ILNASB, thus concentrating a great fraction of pulverized coal near the central axis. Form the study, the gas/particle flow characteristics of the ILNASB show that the improved burner has the ability to ease slagging and reduce NOx emissions.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:10:p:6184-6194
    DOI: 10.1016/j.energy.2011.07.044
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    References listed on IDEAS

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    1. 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.
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    Cited by:

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    2. Xiao, Gang & Zhou, Tianxue & Ni, Mingjiang & Chen, Conghui & Luo, Zhongyang & Cen, Kefa, 2014. "Study on oscillating flow of moderate kinetic Reynolds numbers using complex velocity model and phase Doppler anemometer," Applied Energy, Elsevier, vol. 130(C), pages 830-837.
    3. Laphirattanakul, Ponepen & Charoensuk, Jarruwat & Turakarn, Chinnapat & Kaewchompoo, Chatchalerm & Suksam, Niwat, 2020. "Development of pulverized biomass combustor with a pre-combustion chamber," Energy, Elsevier, vol. 208(C).
    4. Liu, Chunlong & Li, Zhengqi & Jing, Xinjing & Xie, Yiquan & Zhang, Qinghua & Zong, Qiudong, 2014. "Experimental investigation into gas/particle flow in a down-fired 350 MWe supercritical utility boiler at different over-fire air ratios," Energy, Elsevier, vol. 64(C), pages 771-778.
    5. Fang, Neng & Li, Zhengqi & Xie, Cheng & Liu, Shuxuan & Zeng, Lingyan & Chen, Zhichao & Zhang, Bin, 2020. "The application of fly ash gasification for purifying the raw syngas in an industrial-scale entrained flow gasifier," Energy, Elsevier, vol. 195(C).

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