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Numerical simulation of the synergistic effect of combustion for the hydrochar /coal blends in a blast furnace

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  • Wang, Qi
  • Wang, Enlu
  • Chionoso, Oguga Paul

Abstract

The practice of injecting a coal/biomass blend can alleviate the pressure on carbon emissions and energy of ironmaking blast furnaces (BFs). In this paper, corn stalks treated by hydrothermal carbonization (HTC) are used as raw materials to eliminate the harm of alkali metals in the ash. The overall performance of individual behavior of the hydrochar, coal, and their blends are analyzed over the raceway with special reference to gas flow, temperature, species, and combustion efficiency. The results show that the hydrochar with higher volatile content is faster to devolatilize, showing a higher CO2 content at the nozzle tip, and reaching a higher burnout in the raceway. The addition of hydrochar to coal can improve the overall flow and combustion performance of the blends. The simulated value is higher than the calculated value, indicating the synergistic effect has existed. When the proportion of the hydrochar is 75% in blends, the synergistic effect is most obvious. The model provides an effective tool for the design of coal/biomass blends.

Suggested Citation

  • Wang, Qi & Wang, Enlu & Chionoso, Oguga Paul, 2022. "Numerical simulation of the synergistic effect of combustion for the hydrochar /coal blends in a blast furnace," Energy, Elsevier, vol. 238(PB).
    • Handle: RePEc:eee:energy:v:238:y:2022:i:pb:s0360544221019708
    DOI: 10.1016/j.energy.2021.121722
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    Cited by:

    1. Wang, Qi & Wang, Enlu & An, Qi & Chionoso, Oguga Paul, 2023. "CFD study of bio-syngas and coal co-injection in a blast furnace with double lance," Energy, Elsevier, vol. 263(PD).
    2. Yuchiao Lu & Hanmin Yang & Andrey V. Karasev & Chuan Wang & Pär G. Jönsson, 2022. "Applications of Hydrochar and Charcoal in the Iron and Steelmaking Industry—Part 1: Characterization of Carbonaceous Materials," Sustainability, MDPI, vol. 14(15), pages 1-27, August.
    3. Zhang, Cuiliu & Zhang, Jianliang & Zheng, Anyang & Xu, Runsheng & Jia, Guoli & Zhu, Jinfeng, 2023. "Effects of hydrogen-rich fuel injection on the states of the raceway in blast furnace," Energy, Elsevier, vol. 274(C).
    4. Tao Li & Guangwei Wang & Heng Zhou & Xiaojun Ning & Cuiliu Zhang, 2022. "Numerical Simulation Study on the Effects of Co-Injection of Pulverized Coal and Hydrochar into the Blast Furnace," Sustainability, MDPI, vol. 14(8), pages 1-13, April.

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