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Abstract:
Fine particles endanger our health and the environment seriously. The concentration of fine particles in the flue gas after the wet flue gas desulfurization system increases instead of decreasing. Wet phase transition agglomeration technology is the newest way to remove the fine particles in the flue gas. Considering the velocity difference of particle agglomeration and growth triggered by the properties of various particles and the speed difference between particles and carrier gas, this paper improved the particle agglomeration equation and established mathematics model of particle agglomeration and growth. Thereafter, a two-layer cyclone device was installed in the normal growth tube to increase the centrifugal force of particles and the turbulence intensity of flue gas. Besides, simulation of flow fields of the normal growth tube and the improved one was implemented respectively through CFD method. It is indicated that the simulation of particle agglomeration and growth in the growth tube with the improved mathematical model has a higher accuracy. Actually, the simulation accuracy reaches 88.2% compared with the experimental result, which is enhanced by 11.3% based on the previous models. Flue gas in the growth tube with cyclone device not only stays for a longer time than that in a normal growth tube, but also gets higher and homogeneous degree of supersaturation which facilitates the agglomeration and growth of particles. Moreover, the removal efficiency of fine particles number concentration is up to 65.8% with the improved growth tube. © 2021, Science Press. All right reserved.
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Source :
Journal of Engineering Thermophysics
ISSN: 0253-231X
CN: 11-2091/O4
Year: 2021
Issue: 4
Volume: 42
Page: 944-952
2 . 0 3 8
JCR@2021
1 . 3 0 0
JCR@2023
ESI Discipline: PHYSICS;
ESI HC Threshold:87
JCR Journal Grade:3
CAS Journal Grade:4
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 7
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