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Safety analysis on the water wall in the 350 MW supercritical CFB boiler under sudden electricity failure

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  • Deng, Boyu
  • Zhang, Man
  • Lyu, Junfu
  • Li, Shaohua
  • Yang, Hairui

Abstract

The necessity of setting up the emergency water supply system in the supercritical circulating fluidized bed (CFB) boiler is still in controversy in the industry. Based on the research methods in the previous literature and the operating experience, this paper proposed three possible emergency strategies for sudden electricity failure. And by analyzing the physical process in the furnace under sudden electricity failure condition, a mathematical model consisted of the mass and energy conservation equation was built, and the accuracy of this model was validated by the experiment data from a supercritical CO2 experimental system. With the help of the model, this paper can quantitatively predict the dynamic process of the working fluid concerning temperature, pressure, and mass in the water wall in the 350 MW supercritical CFB boiler under the above three emergency strategies. In addition, an estimation of the pipe-broken time for the water wall under such condition was given. Results showed that the longest pipe-broken time was about 52 mins considering the pressure effect. Thus this paper can draw a preliminary conclusion that setting up an emergency water supply system was not a necessity in the 350 MW supercritical CFB boiler.

Suggested Citation

  • Deng, Boyu & Zhang, Man & Lyu, Junfu & Li, Shaohua & Yang, Hairui, 2019. "Safety analysis on the water wall in the 350 MW supercritical CFB boiler under sudden electricity failure," Energy, Elsevier, vol. 189(C).
    • Handle: RePEc:eee:energy:v:189:y:2019:i:c:s0360544219320596
    DOI: 10.1016/j.energy.2019.116364
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    References listed on IDEAS

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    1. Zhu, Shahong & Zhang, Man & Huang, Yiqun & Wu, Yuxin & Yang, Hairui & Lyu, Junfu & Gao, Xinyu & Wang, Fengjun & Yue, Guangxi, 2019. "Thermodynamic analysis of a 660 MW ultra-supercritical CFB boiler unit," Energy, Elsevier, vol. 173(C), pages 352-363.
    2. Lee, See Hoon & Lee, Tae Hee & Jeong, Sang Mun & Lee, Jong Min, 2019. "Economic analysis of a 600 mwe ultra supercritical circulating fluidized bed power plant based on coal tax and biomass co-combustion plans," Renewable Energy, Elsevier, vol. 138(C), pages 121-127.
    3. Zima, Wiesław, 2019. "Simulation of rapid increase in the steam mass flow rate at a supercritical power boiler outlet," Energy, Elsevier, vol. 173(C), pages 995-1005.
    4. Taler, Jan & Zima, Wiesław & Ocłoń, Paweł & Grądziel, Sławomir & Taler, Dawid & Cebula, Artur & Jaremkiewicz, Magdalena & Korzeń, Anna & Cisek, Piotr & Kaczmarski, Karol & Majewski, Karol, 2019. "Mathematical model of a supercritical power boiler for simulating rapid changes in boiler thermal loading," Energy, Elsevier, vol. 175(C), pages 580-592.
    5. Zima, Wiesław & Nowak-Ocłoń, Marzena & Ocłoń, Paweł, 2015. "Simulation of fluid heating in combustion chamber waterwalls of boilers for supercritical steam parameters," Energy, Elsevier, vol. 92(P1), pages 117-127.
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    Cited by:

    1. Boyu Deng & Tuo Zhou & Shuangming Zhang & Haowen Wu & Xiaoguo Jiang & Man Zhang & Hairui Yang, 2022. "Safety Analysis on the Heating Surfaces in the 660 MW Ultra-Supercritical CFB Boiler under Sudden Electricity Failure," Energies, MDPI, vol. 15(21), pages 1-15, October.
    2. Zima, Wiesław & Grądziel, Sławomir & Cebula, Artur & Rerak, Monika & Kozak-Jagieła, Ewa & Pilarczyk, Marcin, 2023. "Mathematical model of a power boiler operation under rapid thermal load changes," Energy, Elsevier, vol. 263(PC).
    3. Yan, Jin & Lu, Xiaofeng & Song, Yangfan & Zheng, Xiong & Lei, Xiujian & Liu, Zhuo & Fan, Xuchen & Liu, Congcong, 2021. "A comprehensive understanding of the non-uniform characteristics and regulation mechanism of six external loops in a 600 MW supercritical CFB boiler," Energy, Elsevier, vol. 222(C).

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