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Effects of Cofiring Coal and Biomass Fuel on the Pulverized Coal Injection Combustion Zone in Blast Furnaces

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  • Gyeong-Min Kim

    (Green Materials and Processes R&D Group, Korea Institute of Industrial Technology, Ulsan 44413, Korea
    These authors contributed equally to this work and should be regarded as co-first authors.)

  • Jae Hyung Choi

    (Green Materials and Processes R&D Group, Korea Institute of Industrial Technology, Ulsan 44413, Korea
    These authors contributed equally to this work and should be regarded as co-first authors.)

  • Chung-Hwan Jeon

    (School of Mechanical Engineering, Pusan National University, Busan 46241, Korea)

  • Dong-Ha Lim

    (Green Materials and Processes R&D Group, Korea Institute of Industrial Technology, Ulsan 44413, Korea)

Abstract

CO 2 emissions are a major contributor to global warming. Biomass combustion is one approach to tackling this issue. Biomass is used with coal combustion in thermal power plants or with blast furnaces (BFs) because it is a carbon-neutral fuel; therefore, biomass provides the advantage of reduced CO 2 emissions. To examine the effect of co-firing on pulverized coal injection (PCI) in BFs, two coals of different ranks were blended with the biomass in different proportions, and then their combustion behaviors were examined using a laminar flow reactor (LFR). The PCI combustion primarily functions as a source of heat and CO to supply the upper part of the BF. To create a similar PCI combustion environment, the LFR burner forms a diffusion flat flame with an oxygen concentration of 26% with a flame temperature of ~2000–2250 K at a heating rate of 10 5 K/s. The combustion characteristics, such as the flame structure, burning coal particle temperature, unburned carbon (UBC), and CO and CO 2 emissions were measured to evaluate their effect on PCI combustion. With the increase in the biomass blending ratio, the brightness of the volatile cloud significantly increased, and the particle temperature tended to decrease. The fragmentation phenomenon, which was observed for certain coal samples, decreased with the increase in the biomass blending ratio. In particular, with an increase in the biomass blending ratio, the optimum combustion point occurred, caused by the fragmentation of coal and volatile gas combustion of biomass.

Suggested Citation

  • Gyeong-Min Kim & Jae Hyung Choi & Chung-Hwan Jeon & Dong-Ha Lim, 2022. "Effects of Cofiring Coal and Biomass Fuel on the Pulverized Coal Injection Combustion Zone in Blast Furnaces," Energies, MDPI, vol. 15(2), pages 1-12, January.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:2:p:655-:d:726762
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    References listed on IDEAS

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    1. Haein Kim & Minsang Kim & Hyunggeun Kim & Sangkyu Park, 2020. "Decomposition Analysis of CO 2 Emission from Electricity Generation: Comparison of OECD Countries before and after the Financial Crisis," Energies, MDPI, vol. 13(14), pages 1-16, July.
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    4. Trishan Deb Abhi & Omid Norouzi & Kevin Macdermid-Watts & Mohammad Heidari & Syeda Tasnim & Animesh Dutta, 2021. "Miscanthus to Biocarbon for Canadian Iron and Steel Industries: An Innovative Approach," Energies, MDPI, vol. 14(15), pages 1-18, July.
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    1. Huang, Junxuan & Liao, Yanfen & Lin, Jianhua & Dou, Changjiang & Huang, Zengxiu & Yu, Xiongwei & Yu, Zhaosheng & Chen, Chunxiang & Ma, Xiaoqian, 2024. "Numerical simulation of the co-firing of pulverized coal and eucalyptus wood in a 1000MWth opposed wall-fired boiler," Energy, Elsevier, vol. 298(C).

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