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Feasibility Study of Co-Firing of Torrefied Empty Fruit Bunch and Coal through Boiler Simulation

Author

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  • Yu Jiang

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

  • Kyeong-Hoon Park

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

  • Chung-Hwan Jeon

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

Abstract

Torrefied empty fruit bunch (EFB) co-firing is a promising technology to reduce emissions from coal-fired power plants. However, co-firing can influence the combustion and heat transfer characteristics in a coal boiler. In order to study the feasibility of co-firing application of torrefied EFB (T-EFB) in boilers, the combustion characteristics, gas emissions and heat flux distribution were analyzed, respectively. First, the kinetic parameters of T-EFB devolatilization and char oxidation were obtained by experimental analysis. Second, the computational fluid dynamics (CFD) analysis was applied to the actual 500 MWe boiler simulation to further evaluate the differences in the co-firing performance parameters (combustion characteristics and emissions) of the T-EFB and the heat transfer characteristics within the boiler. Numerical results show that T-EFB co-firing can improve the ignition characteristics of pulverized coal, reduce the formation of unburned particles. When the blending ratio was increased from 10% to 50%, significantly NO x (oxides of nitrogen) reduction (levels from 170 to 98 ppm at 6% O 2 ) was achieved. At a blending ratio above 40%, boiler combustion efficiency decreases as the total heat flux of the boiler decreases due to an increase in the amount of unburned carbon. In addition, T-EFB co-firing can affect the heat transfer characteristics of the boiler.

Suggested Citation

  • Yu Jiang & Kyeong-Hoon Park & Chung-Hwan Jeon, 2020. "Feasibility Study of Co-Firing of Torrefied Empty Fruit Bunch and Coal through Boiler Simulation," Energies, MDPI, vol. 13(12), pages 1-27, June.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:12:p:3051-:d:370867
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    References listed on IDEAS

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    2. Yu Jiang & Zihua Tang & Xiaoyu Zhang & Chao Wang & Guoliang Song & Qinggang Lyu, 2023. "Comparative Analysis of Combustion Characteristics of a CFB Boiler during the Changes Process between High-Rated Loads and Low-Rated Loads," Energies, MDPI, vol. 16(17), pages 1-15, August.
    3. Hariana, & Putra, Hanafi Prida & Prabowo, & Hilmawan, Edi & Darmawan, Arif & Mochida, Keiichi & Aziz, Muhammad, 2023. "Theoretical and experimental investigation of ash-related problems during coal co-firing with different types of biomass in a pulverized coal-fired boiler," Energy, Elsevier, vol. 269(C).
    4. Giuseppe Toscano & Carmine De Francesco & Thomas Gasperini & Sara Fabrizi & Daniele Duca & Alessio Ilari, 2023. "Quality Assessment and Classification of Feedstock for Bioenergy Applications Considering ISO 17225 Standard on Solid Biofuels," Resources, MDPI, vol. 12(6), pages 1-22, May.
    5. Jiang, Yu & Lee, Byoung-Hwa & Oh, Dong-Hun & Jeon, Chung-Hwan, 2022. "Influence of various air-staging on combustion and NOX emission characteristics in a tangentially fired boiler under the 50% load condition," Energy, Elsevier, vol. 244(PB).

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