Kaijie Xu1, Kangping Cui This email address is being protected from spambots. You need JavaScript enabled to view it.1, Jin-Luh Mou2, Ya-Fen Wang This email address is being protected from spambots. You need JavaScript enabled to view it.3,4, Lin-Chi Wang3,4

1 School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China
2 Liaocheng Baijun Environmental Technology Co., Ltd., Liaocheng 252100, China
3 Department of Environmental Engineering, Chung-Yuan Christian University, Taoyuan 32023, Taiwan
4 Center for Environmental Risk Management, Chung Yuan Christian University, Taoyuan 32023, Taiwan


Received: June 15, 2021
Revised: July 8, 2021
Accepted: July 14, 2021

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.4209/aaqr.210145  

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Cite this article:

Xu, K., Cui, K., Mou, J.L., Wang, Y.F., Wang, L.C. (2021). Dust Agglomeration in an Electrostatic Precipitator. Aerosol Air Qual. Res. 21, 210145. https://doi.org/10.4209/aaqr.210145


HIGHLIGHTS

  • Dust agglomeration of EP during sintering of an ironmaking plant was investigated.
  • The unburn carbon was found to be the main factor resulting in dust agglomeration.
  • Impact of fuel particle size for sintering on dust agglomeration was reported.
  • The control measures for the prevention of dust agglomeration in EP was proposed.
 

ABSTRACT


Dust agglomeration in an electrostatic precipitator (EP) during the sintering process taking place in an ironmaking plant was investigated. The dust agglomeration in the high sulfur flue gas dust hopper of the EP was very serious and did affect the removal of the dust from the hopper. The size of the agglomerate ranged from approximately 30–50 cm and was found to exhibit strong magnetic behavior. After combining actual operational observations and the physical and chemical test results, it was determined that the main factor resulting in the dust agglomeration in the EP was the unburned carbon, which was between 0.025% and 4.45% in the four samples of EP dust taken from different locations in the EP. In order to prevent fire accidents and dust agglomeration in the EP during the sintering process, the percentage of fine fuel particles (sized smaller than 1 mm) should be minimized; the average fuel particle size for the sintering process should be controlled at 2.5–3.0 mm, where the mass fraction accounts for approximately 80% of the fuel. In addition, strict sealing of the air box flue, the import and export flange, the expansion joint connection, the manhole door, and EP body should be carried out and maintained. Finally, the thickness of the bedding material should be more than 30 mm to ensure full combustion of the fuel used in the sintering process. This study provides useful information for the prevention of dust agglomeration in the EP during the sintering process.


Keywords: Dust, Agglomeration, Electrostatic precipitator, Sintering, Air pollution




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