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A New Agro/Forestry Residues Co-Firing Model in a Large Pulverized Coal Furnace: Technical and Economic Assessments

Author

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  • Weigang Xu

    (Ministry of Education (MOE), Key Laboratory of Thermo-Fluid Science and Engineering, Department of Thermal Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Shaanxi 710049, China)

  • Yanqing Niu

    (Ministry of Education (MOE), Key Laboratory of Thermo-Fluid Science and Engineering, Department of Thermal Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Shaanxi 710049, China)

  • Houzhang Tan

    (Ministry of Education (MOE), Key Laboratory of Thermo-Fluid Science and Engineering, Department of Thermal Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Shaanxi 710049, China)

  • Denghui Wang

    (Ministry of Education (MOE), Key Laboratory of Thermo-Fluid Science and Engineering, Department of Thermal Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Shaanxi 710049, China)

  • Wenzhi Du

    (Ministry of Education (MOE), Key Laboratory of Thermo-Fluid Science and Engineering, Department of Thermal Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Shaanxi 710049, China)

  • Shien Hui

    (Ministry of Education (MOE), Key Laboratory of Thermo-Fluid Science and Engineering, Department of Thermal Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Shaanxi 710049, China)

Abstract

Based on the existing biomass co-firing technologies and the known innate drawbacks of dedicated biomass firing, including slagging, corrosion and the dependence on fuel, a new model of agro/forestry residue pellets/shreds and coal co-fired in a large Pulverized Coal (PC) furnace was proposed, and the corresponding technical and economic assessments were performed by co-firing testing in a 300 MW PC furnace and discounted cash flow technique. The developed model is more dependent on injection co-firing and combined with co-milling co-firing. Co-firing not only reduces CO 2 emission, but also does not significantly affect the fly ash use in cement industry, construction industry and agriculture. Moreover, economic assessments show that in comparison with dedicated firing in grate furnace, agro/forestry residues and coal co-firing in a large PC furnace is highly economic. Otherwise, when the co-firing ratio was below 5 wt%, the boiler co-firing efficiency was 0.05%–0.31% higher than that of dedicated PC combustion, and boiler efficiencies were about 0.2% higher with agro/forestry residues co-firing in the bottom and top burner systems than that in a middle burner system.

Suggested Citation

  • Weigang Xu & Yanqing Niu & Houzhang Tan & Denghui Wang & Wenzhi Du & Shien Hui, 2013. "A New Agro/Forestry Residues Co-Firing Model in a Large Pulverized Coal Furnace: Technical and Economic Assessments," Energies, MDPI, vol. 6(9), pages 1-17, August.
    • Handle: RePEc:gam:jeners:v:6:y:2013:i:9:p:4377-4393:d:28254
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    References listed on IDEAS

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    1. Savolainen, Kati, 2003. "Co-firing of biomass in coal-fired utility boilers," Applied Energy, Elsevier, vol. 74(3-4), pages 369-381, March.
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    2. Muhammad Aziz & Dwika Budianto & Takuya Oda, 2016. "Computational Fluid Dynamic Analysis of Co-Firing of Palm Kernel Shell and Coal," Energies, MDPI, vol. 9(3), pages 1-15, February.
    3. Niu, Yanqing & Lv, Yuan & Lei, Yu & Liu, Siqi & Liang, Yang & Wang, Denghui & Hui, Shi'en, 2019. "Biomass torrefaction: properties, applications, challenges, and economy," Renewable and Sustainable Energy Reviews, Elsevier, vol. 115(C).
    4. Li, Fenghai & Li, Yang & Fan, Hongli & Wang, Tao & Guo, Mingxi & Fang, Yitian, 2019. "Investigation on fusion characteristics of deposition from biomass vibrating grate furnace combustion and its modification," Energy, Elsevier, vol. 174(C), pages 724-734.
    5. Marco Torresi & Francesco Fornarelli & Bernardo Fortunato & Sergio Mario Camporeale & Alessandro Saponaro, 2017. "Assessment against Experiments of Devolatilization and Char Burnout Models for the Simulation of an Aerodynamically Staged Swirled Low-NO x Pulverized Coal Burner," Energies, MDPI, vol. 10(1), pages 1-24, January.

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