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Numerical investigation of air-staged combustion emphasizing char gasification and gas temperature deviation in a large-scale, tangentially fired pulverized-coal boiler

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  • Liu, Yacheng
  • Fan, Weidong
  • Li, Yu

Abstract

A refined char gasification model, successfully validated in a pilot-scale 20kW down-fired furnace, is now applied to a numerical investigation of the characteristics of the flow, temperature, and species distribution under various air-staged levels of combustion in a 600MWe tangentially fired (T-fired) pulverized-coal (PC) boiler. The simulation results with char gasification show that the CO concentration profile in both the primary combustion zone and the reduction zone is much higher than the corresponding case without the gasification model for deep (burnout air rate, fS=0.42), middle (fS=0.30), and shallow (fS=0.17) air-staged cases. Moreover, this result is in accordance with the tests from an industrial pulverized-coal-fired furnace. It can be concluded that the char gasification mechanism should be considered in the numerical simulation of large-scale air-staged T-fired PC boilers. On the basis of a reasonable prediction of combustion characteristics, the gas temperature deviation in the crossover pass was also depicted under conditions of various air-staged levels. The result of the thermal load curve of the final super-heater panels clearly presents a saddle-type distribution for the existing two peak values. These inherent deviations originate from the residual swirling flow at the furnace exit. More specifically, parameters of swirling momentum intensity (δ) in the furnace and heat flow intensity (Ψ) at the entry of the final super-heater were employed to identify the temperature deviation in degrees.

Suggested Citation

  • Liu, Yacheng & Fan, Weidong & Li, Yu, 2016. "Numerical investigation of air-staged combustion emphasizing char gasification and gas temperature deviation in a large-scale, tangentially fired pulverized-coal boiler," Applied Energy, Elsevier, vol. 177(C), pages 323-334.
    • Handle: RePEc:eee:appene:v:177:y:2016:i:c:p:323-334
    DOI: 10.1016/j.apenergy.2016.05.135
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    References listed on IDEAS

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    1. Li, Yu & Fan, Weidong, 2016. "Effect of char gasification on NOx formation process in the deep air-staged combustion in a 20kW down flame furnace," Applied Energy, Elsevier, vol. 164(C), pages 258-267.
    2. Hodžić, Nihad & Kazagić, Anes & Smajević, Izet, 2016. "Influence of multiple air staging and reburning on NOx emissions during co-firing of low rank brown coal with woody biomass and natural gas," Applied Energy, Elsevier, vol. 168(C), pages 38-47.
    3. Dong, Changqing & Yang, Yongping & Yang, Rui & Zhang, Junjiao, 2010. "Numerical modeling of the gasification based biomass co-firing in a 600Â MW pulverized coal boiler," Applied Energy, Elsevier, vol. 87(9), pages 2834-2838, September.
    4. Yin, Chungen & Yan, Jinyue, 2016. "Oxy-fuel combustion of pulverized fuels: Combustion fundamentals and modeling," Applied Energy, Elsevier, vol. 162(C), pages 742-762.
    5. Kim, Ryang-Gyoon & Hwang, Chan-Won & Jeon, Chung-Hwan, 2014. "Kinetics of coal char gasification with CO2: Impact of internal/external diffusion at high temperature and elevated pressure," Applied Energy, Elsevier, vol. 129(C), pages 299-307.
    6. Jeong, Hyo Jae & Seo, Dong Kyun & Hwang, Jungho, 2014. "CFD modeling for coal size effect on coal gasification in a two-stage commercial entrained-bed gasifier with an improved char gasification model," Applied Energy, Elsevier, vol. 123(C), pages 29-36.
    7. Karampinis, E. & Nikolopoulos, N. & Nikolopoulos, A. & Grammelis, P. & Kakaras, E., 2012. "Numerical investigation Greek lignite/cardoon co-firing in a tangentially fired furnace," Applied Energy, Elsevier, vol. 97(C), pages 514-524.
    8. Irfan, Muhammad F. & Usman, Muhammad R. & Kusakabe, K., 2011. "Coal gasification in CO2 atmosphere and its kinetics since 1948: A brief review," Energy, Elsevier, vol. 36(1), pages 12-40.
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