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A Study on the Co-Combustion Characteristics of Coal and Bio-SRF in CFBC

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  • Jeong-Seon Shin

    (Greenhouse Gas Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
    Graduate School of Energy Science and Technology, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea)

  • Dowon Shun

    (Greenhouse Gas Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea)

  • Churl-Hee Cho

    (Graduate School of Energy Science and Technology, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea)

  • Dal-Hee Bae

    (Greenhouse Gas Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea)

Abstract

Bio-SRF based on livestock waste has low heating value and high moisture content. The concentration of toxic gases such as SOx, NOx, and HCl in the flue gas is changed according to the composition of fuel, and it has been reported. Therefore, the study of fuel combustion characteristics is necessary. In this study, we investigated combustion characteristics on the blended firing of coal and Bio-SRF (bio-solid refused fuel) made from livestock waste fuel in CFBC (circulating fluidized bed combustor). The raw materials for manufacturing Bio-SRF include agricultural waste, herbaceous plants, waste wood, and vegetable residues. Bio-SRF, which is formed from organic sludge, has a low heating value and a high moisture content. Bio-SRF of livestock waste fuel is blended with different ratios of coal based on heating values when coal is completely combusted in CFBC. In the result of experiment, the combustor efficiency of calculated unburned carbon concentration in the fly ash shows 98.87%, 99.04%, 99.64%, and 99.71% when the multi co-combustion ratio of livestock waste fuel increased from 100/0 (coal/livestock waste) to 70/30 (coal/livestock waste). In addition, the boiler efficiency is shown to be 86.23%, 86.30%, 87.24% and 87.27%. Through the experimental results, we have identified that co-combustion of livestock waste fuel does not affect boiler efficiency. We have systematically investigated and discussed the temperature changes of the internal combustor, compositions of flue gases, solid ash characteristics, and the efficiency of combustion and of the boiler during co-combustion of coal and Bio-SRF.

Suggested Citation

  • Jeong-Seon Shin & Dowon Shun & Churl-Hee Cho & Dal-Hee Bae, 2023. "A Study on the Co-Combustion Characteristics of Coal and Bio-SRF in CFBC," Energies, MDPI, vol. 16(4), pages 1-13, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:4:p:1981-:d:1071088
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    References listed on IDEAS

    as
    1. Changkook Ryu & Donghoon Shin, 2012. "Combined Heat and Power from Municipal Solid Waste: Current Status and Issues in South Korea," Energies, MDPI, vol. 6(1), pages 1-13, December.
    2. Jong-Seon Shin & Dowon Shun & Churl-Hee Cho & Yujin Choi & Dal-Hee Bae, 2022. "The Characteristics of the After-Combustion in a Commercial CFBC Boiler Using the Solid Waste Fuel," Energies, MDPI, vol. 15(15), pages 1-15, July.
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