Demonstration and application of heterogeneous agglomeration technology in a 350 MW coal-fired power plant: Removal of particulate matter and trace elements

•Heterogeneous agglomeration reduce the emission of fine particles and trace elements.•The mechanism of heterogeneous agglomeration on fine particles and trace elements.•Combined removal of pollutants by heterogeneous agglomeration and ESP.•Migration and transformation of trace elements in the tail...

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Bibliographic Details
Published in:Fuel (Guildford) 2022-02, Vol.309, p.122361, Article 122361
Main Authors: Cui, Xiangzheng, Zhao, Yongchun, Ji, Yushan, Liu, Jingchao, Gao, Tian, Yang, Gangzhong, Wang, Yi, Xiao, Rihong, Chuai, Xing, Zhang, Junying
Format: Article
Language:English
Subjects:
Agglomeration
Arsenic
Coal-fired power plants
Emissions control
Flue gas
Fly ash
Heterogeneous agglomeration
Industrial plant emissions
Lead
Particulate emissions
Particulate matter
Power plants
Reagents
Selenium
Spraying
Synergistic effect
Synergistic removal
Technology
Trace elements
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Summary:•Heterogeneous agglomeration reduce the emission of fine particles and trace elements.•The mechanism of heterogeneous agglomeration on fine particles and trace elements.•Combined removal of pollutants by heterogeneous agglomeration and ESP.•Migration and transformation of trace elements in the tail gas of power plants. For a domestic 350 MW coal-fired power plant, the effect of heterogeneous agglomeration technology on the migration and emission of three trace elements of arsenic, selenium and lead in tail flue gas was studied. The results show that heterogeneous agglomeration technology can promote the attachment of gaseous harmful trace elements to particulate matter effectively. The reduction rates of gaseous As, Se and Pb concentrations at the ESP outlet were 24.10%, 61.08%, and 70.38%, respectively. Under the synergistic effect of ESP, more As, Se, and Pb are enriched in fly ash, and the concentration of As, Se, and Pb in fine particles below 10 μm at the ESP outlet is reduced by 54.48%, 56.47%, and 75.17%, respectively. In addition, after spraying the agglomerating agent, the final As, Se, and Pb concentrations in the atmosphere were 1.29 μg/m3, 2.01 μg/m3, and 1.12 μg/m3, which were far lower than those of the relevant EPA emission limits.
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2021.122361