ORIGINAL RESEARCH
Agglomeration and Removal of Submicron
Fine Particulate Matter as a Result of
Acidification and Evaporation
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1
Address School of Electric Power, Civil Engineering and Architecture, Shanxi University, Taiyuan, 030006, P.R. China
2
School of Mining and Technology, Inner Mongolia University of Technology, Hohhot 010051, P.R. China
3
Key lab. of University of Geological Hazards and Geotechnical Engineering Defense in Sandy, Drought and Cold
regions, Inner Mongolia Autonomous Region, Hohhot 010051, P.R. China
Submission date: 2024-06-06
Final revision date: 2024-08-01
Acceptance date: 2024-09-09
Online publication date: 2024-11-08
Publication date: 2025-11-04
Corresponding author
Yingying Xiong
Address School of Electric Power, Civil Engineering and Architecture, Shanxi University, Taiyuan, 030006, P.R. China
Pol. J. Environ. Stud. 2025;34(6):7287-7297
KEYWORDS
TOPICS
ABSTRACT
This study investigates the efficacy of coal dust removal using a wet-acid-ash experimental platform
that incorporates flue-temperature coupling. The acidification–evaporation method was employed to
quantify the dust eliminated from the flue gas and examine the particle-size distribution of submicron
particles before and after the dust-removal process. These measurements were conducted under
various conditions, including acidification, coupled humidification, cooling, and particle-concentration
variations. Based on these experimental findings, we examined the aggregation and removal behaviors
of submicron fine particulate matter. The temperature of the simulated hot dust-laden flue gas decreased
from 120°C to 80°C, while the absolute humidity was adjusted to 8.90%, acidity to 4.183 ppm, and flyash
particle concentration to 385.27 μg⸳m. Notably, there was a significant increase in the mean diameter
of the volume distribution of submicron fine particles undergoing agglomeration, rising from to 20–
37μm to 51.355μm. After the dust-removal procedure, the effectiveness of the dust collector reached
99.63%, thereby successfully removing submicron fine particles. Furthermore, the mean diameter of the
number distribution decreased from 1.769 to 0.869 μm. The experimental results demonstrate that when
flue gas is evaporated through a high temperature and coupled with humidity and acid ash, the ability
of fly ash particles to adsorb aerosol droplets is enhanced. This enhancement promotes mutual adhesion
among the submicron fine particles, intensifying their agglomeration. Consequently, the agglomerated
particles are effectively captured by the dust collector, facilitating the removal and reduction of
submicron fine particles.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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