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Study on Gas–Solid Two–Phase Flow Characteristics of One–Furnace with Two–Tower Semi–Dry Desulfurization in Circulating Fluidized Bed Boiler

Author

Listed:
  • Xueshen Wang

    (Sichuan Baima CFB Demonstration Power Plant Co., Ltd., Neijiang 641005, China)

  • Zheng Gan

    (Sichuan Baima CFB Demonstration Power Plant Co., Ltd., Neijiang 641005, China)

  • Shengwei Xin

    (CHN Energy Group CFB Technology R&D Center, Xi’an 710065, China)

  • Chunzhen Yang

    (CHN Energy Group (Shandong) Energy & Environment Co., Ltd., Jinan 250061, China)

Abstract

A single–phase flow model was used to analyze the uniformity of the flow field in the desulfurization tower under different baffle combinations, and a multiphase flow model was used to explain the gas and solid two–phase flow characteristics and chemical reaction characteristics in the tower. The stability of the flow behavior of gas and solids in one furnace and two towers was discussed. The results show that the installation of shielding plates at appropriate positions in the tower for sulfur removal is beneficial to enhance the uniform distribution of flow in space, reduce the pulsation interference of bed pressure in the tower, keep the state of gas and solid flow unchanged, and maintain the efficiency of desulfurization at a high level. Reducing the instability of gas–solid two–phase flow is the basis of ensuring the stable switching between single and double towers.

Suggested Citation

  • Xueshen Wang & Zheng Gan & Shengwei Xin & Chunzhen Yang, 2023. "Study on Gas–Solid Two–Phase Flow Characteristics of One–Furnace with Two–Tower Semi–Dry Desulfurization in Circulating Fluidized Bed Boiler," Energies, MDPI, vol. 16(4), pages 1-13, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:4:p:1971-:d:1070763
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    References listed on IDEAS

    as
    1. Chen Yang & Haochuang Wu & Kangjie Deng & Hangxing He & Li Sun, 2019. "Study on Powder Coke Combustion and Pollution Emission Characteristics of Fluidized Bed Boilers," Energies, MDPI, vol. 12(8), pages 1-18, April.
    2. Yimin Deng & Renaud Ansart & Jan Baeyens & Huili Zhang, 2019. "Flue Gas Desulphurization in Circulating Fluidized Beds," Energies, MDPI, vol. 12(20), pages 1-19, October.
    3. Xuemin Liu & Hairui Yang & Junfu Lyu, 2020. "Optimization of Fluidization State of a Circulating Fluidized Bed Boiler for Economical Operation," Energies, MDPI, vol. 13(2), pages 1-20, January.
    4. Lizheng Zhao & Yanfei Du & Yusen Zeng & Zhizhong Kang & Baomin Sun, 2020. "Sulfur Conversion of Mixed Coal and Gangue during Combustion in a CFB Boiler," Energies, MDPI, vol. 13(3), pages 1-19, January.
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