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Optimization of the Air Distribution in a Biomass Grate-Fired Furnace

Author

Listed:
  • Qingjia Wang

    (School of Energy and Power Engineering, Changchun Institute of Technology, Changchun 130012, China
    State Key Laboratory of Power Systems, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China)

  • Man Zhang

    (State Key Laboratory of Power Systems, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China)

  • Fan Xiao

    (State Key Laboratory of Power Systems, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
    College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Hairui Wang

    (School of Energy and Power Engineering, Changchun Institute of Technology, Changchun 130012, China)

  • Yan Jin

    (College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Nan Hu

    (School of Energy and Power Engineering, Changchun Institute of Technology, Changchun 130012, China)

  • Hairui Yang

    (State Key Laboratory of Power Systems, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China)

Abstract

This study utilized a combination of FLIC(1D3.2C) and FLUENT(2021R2) software to optimize the primary air distribution along the grate and the performance of a straw briquette combustion furnace of a 7 MW unit in China used to produce hot air for drying grain. Three air distribution modes, namely front-enhanced, uniform, and rear-enhanced modes, were analyzed to determine their effect on the flue gas components above the grate, the temperature field in the furnace, and the nitrogen oxide concentration at the furnace outlet. The results of the calculations showed that the NO x emissions for the front-enhanced, uniform, and rear-enhanced modes were 133.5 mg/Nm 3 , 104.4 mg/Nm 3 , and 76.6 mg/Nm 3 , respectively. It was found that the rear-enhanced mode can expand the biomass drying, devolatilization, and combustion zone, thus improving the furnace combustion performance and decreasing NO x emissions. These findings can provide useful guidance for optimizing biomass chain-grate-firing furnaces.

Suggested Citation

  • Qingjia Wang & Man Zhang & Fan Xiao & Hairui Wang & Yan Jin & Nan Hu & Hairui Yang, 2023. "Optimization of the Air Distribution in a Biomass Grate-Fired Furnace," Energies, MDPI, vol. 16(22), pages 1-13, November.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:22:p:7634-:d:1282636
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