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Computational Analysis of Tube Wall Temperature of Superheater in 1000 MW Ultra-Supercritical Boiler Based on the Inlet Thermal Deviation

Author

Listed:
  • Pei Li

    (Institute of Thermal Science and Power Systems, Zhejiang University, Hangzhou 310027, China)

  • Ting Bao

    (Zhejiang Provincial Key Laboratory of Energy Conservation & Pollutant Control Technology for Thermal Power, Zhejiang Zheneng Technology Research Institute Co., Ltd., Hangzhou 311121, China)

  • Jian Guan

    (Zhejiang Province Energy Group Co., Ltd., Hangzhou 310007, China)

  • Zifu Shi

    (State Key Laboratory of Clean Energy Utilization, Institute of Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China)

  • Zengxiao Xie

    (Zhejiang Zheneng Zhongmei Zhoushan Coal & Electricity Co., Ltd., Zhoushan 316131, China)

  • Yonggang Zhou

    (State Key Laboratory of Clean Energy Utilization, Institute of Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China)

  • Wei Zhong

    (Institute of Thermal Science and Power Systems, Zhejiang University, Hangzhou 310027, China)

Abstract

Local over-temperature is one of the main reasons for boiler tube failures (BTF). By accurately monitoring and controlling tube wall temperature, local over-temperature can be avoided. Based on the measured flue gas parameters and numerical simulation, a method of thermal deviation calculation is proposed in this study for the on-line calculation of the tube wall temperature of boiler superheaters. The full-size three-dimensional numerical simulation was presented on the combustion in a pulverized coal-fired boiler of 1000 MW ultra-supercritical (USC) unit. A difference in the thermal deviation of the vertical direction was innovatively introduced into a segmented discrete model, and the thermal deviation condition conforming to reality was introduced into the calculation. An on-line calculation system developed based on the current calculation method was applied in a 1000 MW USC unit. The calculated local high-temperature zone was consistent with the actual over-temperature position and conformed to the law of the allowable metal temperature of the final superheater (FSH) serpentines segment. The comparison results showed that the calculated data by this method were more reflective of tube wall temperature change with boiler loads than the measured data. According to the calculated local over-temperature zone, the immediate warning response can effectively reduce the possibility of over-temperature BTF.

Suggested Citation

  • Pei Li & Ting Bao & Jian Guan & Zifu Shi & Zengxiao Xie & Yonggang Zhou & Wei Zhong, 2023. "Computational Analysis of Tube Wall Temperature of Superheater in 1000 MW Ultra-Supercritical Boiler Based on the Inlet Thermal Deviation," Energies, MDPI, vol. 16(3), pages 1-15, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:3:p:1539-:d:1057317
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    References listed on IDEAS

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    1. Wu, Xiaofeng & Fan, Weidong & Liu, Yacheng & Bian, Bao, 2019. "Numerical simulation research on the unique thermal deviation in a 1000 MW tower type boiler," Energy, Elsevier, vol. 173(C), pages 1006-1020.
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