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Full-scale CFD investigation of gas-particle flow, interactions and combustion in tangentially fired pulverized coal furnace

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  • Belošević, Srdjan
  • Tomanović, Ivan
  • Crnomarković, Nenad
  • Milićević, Aleksandar

Abstract

Investigations suggest the need for better understanding of reactive gas-particle turbulent flow phenomena in full-scale energy systems. Numerical study was done in 350 MWe utility boiler tangentially fired furnace to clarify selected issues, such as turbulence modulation, particles dispersion, energy transfer between phases, combustion process and flame, by using an in-house developed combustion code. Numerical experiments demonstrated remarkable complexity of flow and interphase exchange. Maximal decrease in average turbulence kinetic energy of 33% due to dispersed phase was predicted for representative monodispersed coal; augmentation obtained for large particles could become attenuation due to the particles size change during combustion. Grinding fineness of polydispersed coal affected the flow, combustion and flame considerably. Fine grinding (R90 = 48.40%) provided ascending flame, higher furnace exit temperature and decrease in turbulence energy, compared with coarse grinding (R90 = 73.85%). Combustion of each particle size class of coal is completed at different vertical levels, influencing the flame position. Diagrams based on numerical predictions were proposed to enable efficient estimations of combustion and flame characteristics in the case-study furnace, for various coal qualities and mass fractions and changed distributions of coal particle size classes over the burner tiers, while necessity for further investigation was pointed out as well.

Suggested Citation

  • Belošević, Srdjan & Tomanović, Ivan & Crnomarković, Nenad & Milićević, Aleksandar, 2019. "Full-scale CFD investigation of gas-particle flow, interactions and combustion in tangentially fired pulverized coal furnace," Energy, Elsevier, vol. 179(C), pages 1036-1053.
    • Handle: RePEc:eee:energy:v:179:y:2019:i:c:p:1036-1053
    DOI: 10.1016/j.energy.2019.05.066
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    References listed on IDEAS

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    1. Kuang, Min & Zhu, Qunyi & Ling, Zhongqian & Ti, Shuguang & Li, Zhengqi, 2017. "Improving gas/particle flow deflection and asymmetric combustion of a 600 MWe supercritical down-fired boiler by increasing its upper furnace height," Energy, Elsevier, vol. 127(C), pages 581-593.
    2. Liu, Chunlong & Li, Zhengqi & Jing, Xinjing & Xie, Yiquan & Zhang, Qinghua & Zong, Qiudong, 2014. "Experimental investigation into gas/particle flow in a down-fired 350 MWe supercritical utility boiler at different over-fire air ratios," Energy, Elsevier, vol. 64(C), pages 771-778.
    3. Liu, Chunlong & Li, Zhengqi & Zeng, Lingyan & Zhang, Qinghua & Hu, Richa & Zhang, Xusheng & Guo, Liang & Huang, Yong & Yang, Xianwei & Chen, Liheng, 2016. "Gas/particle two-phase flow characteristics of a down-fired 350 MWe supercritical utility boiler at different tertiary air ratios," Energy, Elsevier, vol. 102(C), pages 54-64.
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    Cited by:

    1. Pieter Rousseau & Ryno Laubscher & Brad Travis Rawlins, 2023. "Heat Transfer Analysis Using Thermofluid Network Models for Industrial Biomass and Utility Scale Coal-Fired Boilers," Energies, MDPI, vol. 16(4), pages 1-49, February.
    2. Askarova, Aliya & Georgiev, Aleksandar & Bolegenova, Saltanat & Beketayeva, Meruyert & Maximov, Valeriyu & Bolegenova, Symbat, 2022. "Computational modeling of pollutants in furnaces of pulverized coal boilers of the republic of Kazakhstan," Energy, Elsevier, vol. 258(C).
    3. Chen, Xi & Zhong, Wenqi & Li, Tianyu, 2023. "Fast prediction of temperature and chemical species distributions in pulverized coal boiler using POD reduced-order modeling for CFD," Energy, Elsevier, vol. 276(C).
    4. Darbandi, Masoud & Fatin, Ali & Bordbar, Hadi, 2020. "Numerical study on NOx reduction in a large-scale heavy fuel oil-fired boiler using suitable burner adjustments," Energy, Elsevier, vol. 199(C).
    5. Wan, Zhanghao & Yang, Shiliang & Wei, Yonggang & Hu, Jianhang & Wang, Hua, 2020. "CFD modeling of the flow dynamics and gasification in the combustor and gasifier of a dual fluidized bed pilot plant," Energy, Elsevier, vol. 198(C).
    6. Straka, Robert & Bernasowski, Mikolaj & Klimczyk, Arkadiusz & Stachura, Ryszard & Svyetlichnyy, Dmytro, 2020. "Prediction of raceway shape in zinc blast furnace under the different blast parameters," Energy, Elsevier, vol. 207(C).
    7. Milićević, Aleksandar & Belošević, Srdjan & Crnomarković, Nenad & Tomanović, Ivan & Tucaković, Dragan, 2020. "Mathematical modelling and optimisation of lignite and wheat straw co-combustion in 350 MWe boiler furnace," Applied Energy, Elsevier, vol. 260(C).

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