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A comprehensive mass balance model of a 550 MWe ultra-supercritical CFB boiler with internal circulation

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  • Li, Dongfang
  • Ke, Xiwei
  • Zhang, Man
  • Yang, Hairui
  • Jung, Sungmook
  • Ahn, Seokgi
  • Jeon, Chung-Hwan

Abstract

The world’s first 550 MWe ultra-supercritical circulating fluidized bed (CFB) boiler designed with integrated recycle heat exchangers (INTREX) commenced operation in 2016. One of the distinguishing features of the INTREX is the internal circulation opening (ICO) that allows the particles in the furnace to flow into the INTREX to enhance the bed-to-tube heat transfer, while the heat transfer is strongly affected by both the mass flow rate of internal circulation m˙ic and particle size in the INTREX, i.e., the mass balance of the INTREX. In the present study, we established a comprehensive one-dimensional model to investigate the mass balance of the boiler including the internal circulation. The coefficient of rebound ηICO was adopted to simulate particle behavior during internal circulation. The experimentally acquired parameters of ash formation and attrition of the coal ash were adopted in the model. The size of INTREX ash obtained from the field test on the 550 MWe boiler was used to determine the value of ηICO. The model results were verified with field tests, and they showed reasonable validity. The model results of the linear correlation between m˙ic and bed pressure displayed good agreement with those from the field tests.

Suggested Citation

  • Li, Dongfang & Ke, Xiwei & Zhang, Man & Yang, Hairui & Jung, Sungmook & Ahn, Seokgi & Jeon, Chung-Hwan, 2020. "A comprehensive mass balance model of a 550 MWe ultra-supercritical CFB boiler with internal circulation," Energy, Elsevier, vol. 206(C).
    • Handle: RePEc:eee:energy:v:206:y:2020:i:c:s0360544220310483
    DOI: 10.1016/j.energy.2020.117941
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    References listed on IDEAS

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    1. Blaszczuk, Artur & Pogorzelec, Michal & Shimizu, Tadaaki, 2018. "Heat transfer characteristics in a large-scale bubbling fluidized bed with immersed horizontal tube bundles," Energy, Elsevier, vol. 162(C), pages 10-19.
    2. Li, Dongfang & Cai, Runxia & Zhang, Man & Yang, Hairui & Choi, Kyeong & Ahn, Seokgi & Jeon, Chung-Hwan, 2020. "Operation characteristics of a bubbling fluidized bed heat exchanger with internal solid circulation for a 550-MWe ultra-supercritical CFB boiler," Energy, Elsevier, vol. 192(C).
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    Cited by:

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    2. Artur Blaszczuk & Szymon Jagodzik, 2021. "Investigation of Heat Transfer in a Large-Scale External Heat Exchanger with Horizontal Smooth Tube Bundle," Energies, MDPI, vol. 14(17), pages 1-24, September.
    3. Chen Yang & Tao Zhang & Zonglong Zhang & Li Sun, 2022. "MLD–MPC for Ultra-Supercritical Circulating Fluidized Bed Boiler Unit Using Subspace Identification," Energies, MDPI, vol. 15(15), pages 1-26, July.
    4. Li, Dongfang & Qu, Xiaoxiao & Li, Junjie & Hong, Suck Won & Jeon, Chung-hwan, 2022. "Microstructural development of product layer during limestone sulfation and its relationship to agglomeration in large-scale CFB boiler," Energy, Elsevier, vol. 238(PC).
    5. Jun Li & Lixian Wang & Yong Chi & Zhaozhi Zhou & Yuanjun Tang & Hui Zhang, 2021. "Life Cycle Assessment of Advanced Circulating Fluidized Bed Municipal Solid Waste Incineration System from an Environmental and Exergetic Perspective," IJERPH, MDPI, vol. 18(19), pages 1-16, October.

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