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Thermal-calculation method for entrained-flow coal gasifiers

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  • Wang, Haopeng
  • Chen, Zhichao
  • Zhang, Bin
  • Zeng, Lingyan
  • Li, Zhengqi
  • Zhang, Xiaoyan
  • Fang, Neng
  • Liu, Xiaoying

Abstract

While entrained-flow coal gasifiers (EFCGs) have been widely used in coal-gasification technologies, the thermal-calculation method, which is important for assessing the design and operation of EFCGs, has never been reported. Based on the fundamental thermal-calculation method for coal-fired boilers, and combined with the two-stage equilibrium model through the difference between the gasification and exit temperatures, we propose a thermal-calculation method for EFCGs to calculate the syngas composition, carbon conversion and energy distributions. The calculated gas compositions and heat loss are in good agreement with experimental data for industrial-scale plants. In the two-stage equilibrium module, the function for calculating the water participation ratio involved in the first-stage equilibrium reaction is improved by considering the influences of the ratios of oxygen/carbon and water/carbon, in addition to the gasification temperature. As the carbon conversion efficiency is significantly influenced by the oxygen/carbon and water/carbon ratios in the first-stage equilibrium system, the calculated carbon conversion efficiencies correspond more closely to the experimental data than the other models considering only the gasification temperature.

Suggested Citation

  • Wang, Haopeng & Chen, Zhichao & Zhang, Bin & Zeng, Lingyan & Li, Zhengqi & Zhang, Xiaoyan & Fang, Neng & Liu, Xiaoying, 2019. "Thermal-calculation method for entrained-flow coal gasifiers," Energy, Elsevier, vol. 166(C), pages 373-379.
    • Handle: RePEc:eee:energy:v:166:y:2019:i:c:p:373-379
    DOI: 10.1016/j.energy.2018.10.004
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    References listed on IDEAS

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    1. Xu, Shisen & Ren, Yongqiang & Wang, Baomin & Xu, Yue & Chen, Liang & Wang, Xiaolong & Xiao, Tiancun, 2014. "Development of a novel 2-stage entrained flow coal dry powder gasifier," Applied Energy, Elsevier, vol. 113(C), pages 318-323.
    2. Cao, Zhikai & Li, Tao & Zhang, Quancong & Zhou, Hua & Song, Can & You, Fengqi, 2018. "Systems modeling, simulation and analysis for robust operations and improved design of entrained-flow pulverized coal gasifiers," Energy, Elsevier, vol. 148(C), pages 941-964.
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    1. 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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