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Synergistic capture of fine particles in wet flue gas through cooling and condensation

Author

Listed:
  • Cui, Lin
  • Song, Xiangda
  • Li, Yuzhong
  • Wang, Yang
  • Feng, Yupeng
  • Yan, Lifan
  • Dong, Yong

Abstract

Coal-fired boilers tend to be equipped with considerable pollutant control equipment given the increase in environmental protection standard, thereby continuously increasing operating cost and decreasing the output rate of coal resources. Synergistic capture of pollutants may be a potential solution. In this work, a method for installing a cooling heat exchanger at the outlet of wet flue gas desulfurization scrubber is proposed to recover waste heat and capture fine particles. The cooling process of this method uses wet atmosphere, thereby indicating that this work differs from previous relevant works that are mainly based on dry deposition. Accordingly, the activity of particle reduction in the exchanger is also considered different. Thus, relevant mechanisms are recently explored on the basis of wet deposition through experiments. In addition to diffusiophoretic and thermophoretic depositions, particle growth or agglomeration is considered a dominant factor. Moreover, condensed water is crucial for cleaning, which may resolve the risk of fouling. Variable analysis of the influences of flue gas temperature drop, trapping surface area, initial particle concentration, and flue gas flow rate are also addressed in this work to provide references for engineering applications. Technical feasibility and economic evaluation of this method are discussed, through which possible measures for improvement are proposed. Furthermore, an applicable mode for heat recovery and a synergistic particle capture are presented, and an acceptable economic performance is estimated.

Suggested Citation

  • Cui, Lin & Song, Xiangda & Li, Yuzhong & Wang, Yang & Feng, Yupeng & Yan, Lifan & Dong, Yong, 2018. "Synergistic capture of fine particles in wet flue gas through cooling and condensation," Applied Energy, Elsevier, vol. 225(C), pages 656-667.
  • Handle: RePEc:eee:appene:v:225:y:2018:i:c:p:656-667
    DOI: 10.1016/j.apenergy.2018.04.084
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    References listed on IDEAS

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    Cited by:

    1. Men, Yiyu & Liu, Xiaohua & Zhang, Tao, 2020. "Analytical solutions of heat and mass transfer process in combined gas-water heat exchanger applied for waste heat recovery," Energy, Elsevier, vol. 206(C).
    2. Cui, Haijiao & Li, Nianping & Peng, Jinqing & Yin, Rongxin & Li, Jingming & Wu, Zhibin, 2018. "Investigation on the thermal performance of a novel spray tower with upward spraying and downward gas flow," Applied Energy, Elsevier, vol. 231(C), pages 12-21.
    3. Feng, Yupeng & Li, Yuzhong & Cui, Lin & Yan, Lifan & Zhao, Cheng & Dong, Yong, 2019. "Cold condensing scrubbing method for fine particle reduction from saturated flue gas," Energy, Elsevier, vol. 171(C), pages 1193-1205.
    4. Pérez-Orozco, Raquel & Patiño, David & Porteiro, Jacobo & Míguez, José Luis, 2020. "Bed cooling effects in solid particulate matter emissions during biomass combustion. A morphological insight," Energy, Elsevier, vol. 205(C).
    5. Pei, Ting & Ma, Suxia & Zhao, Guanjia & Song, Guanqiang & Wang, Peng & Mi, Chenfeng, 2023. "Improving the removal of SO3 aerosol by combining flue gas condensation and alkali spray," Energy, Elsevier, vol. 272(C).
    6. Li, Zhaohao & Mi, Dabin & Zhang, Heng & Chen, Haiping & Liu, Zhenghao & Gao, Dan, 2021. "Experimental study on synergistic capture of fine particles and waste heat from flue gas using membrane condenser," Energy, Elsevier, vol. 217(C).
    7. Hyeonrok Choi & Won Yang & Yongwoon Lee & Changkook Ryu, 2024. "Characteristics of SO 2 Removal and Heat Recovery of Flue Gas Based on a Hybrid Flue Gas Condenser," Energies, MDPI, vol. 17(19), pages 1-12, September.

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