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Experimental air/particle flow characteristics of an 80,000 Nm3/h fly ash entrained-flow gasifier with different multi-burner arrangements

Author

Listed:
  • Fang, Neng
  • Li, Zhengqi
  • Liu, Shuxuan
  • Xie, Cheng
  • Zeng, Lingyan
  • Chen, Zhichao

Abstract

A novel burner arrangement for entrained-flow pulverized coal gasifier with multiple low-set burners, which burners are arranged to be counter-biased, is proposed aimed at mitigating high-temperature corrosion to the wall. To verify the characteristics of this improvement in an 80,000 Nm3/h fly ash entrained-flow gasifier, experiments were conducted on the model to investigate the impact of six burners being co-biased, opposed and counter-biased on the air/particle flow field by using a particle dynamics anemometer. The results show that, on the horizontal cross-section passing through burner centerlines with co-biased burners, opposed burners and counter-biased burners, the radius of mixing zone is 0.196, 0.16 and 0.174; the ratio of total particle volume flux in the near-wall region to the total particle volume flux in the measurement zone was 76.5%, 26.1% and 57.8%, respectively. On the vertical cross-section above burner outlet, the radius of central recirculation zone with co-biased burners remains to expand to 0.88 while that of counter-biased burners gradually shrinks to 0.33. There is no central recirculation zone under opposed burners; air and particle swirl numbers are close to zero. This study shows that new burner arrangement could ease high-temperature corrosion to gasifier wall and strengthens mixing of burner jets.

Suggested Citation

  • Fang, Neng & Li, Zhengqi & Liu, Shuxuan & Xie, Cheng & Zeng, Lingyan & Chen, Zhichao, 2021. "Experimental air/particle flow characteristics of an 80,000 Nm3/h fly ash entrained-flow gasifier with different multi-burner arrangements," Energy, Elsevier, vol. 215(PB).
    • Handle: RePEc:eee:energy:v:215:y:2021:i:pb:s0360544220322672
    DOI: 10.1016/j.energy.2020.119160
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    References listed on IDEAS

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    Cited by:

    1. Fang, Neng & Zhang, Pan & Wang, Weiliang & Wang, Qian & Lyu, Junfu & Zhang, Hai & Yue, Guangxi, 2022. "Effects of coal particle size on the two-phase flow and slagging performance in a swirl burner," Energy, Elsevier, vol. 238(PB).
    2. Fang, Neng & Li, Zhengqi & Xie, Cheng & Liu, Shuxuan & Lu, Yue & Zeng, Lingyan & Chen, Zhichao, 2021. "Influence of the multi-burner bias angle on the air/particle flow characteristics in an improved fly ash entrained-flow gasifier," Energy, Elsevier, vol. 234(C).

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