EXPERIMENTAL STUDY ON ACOUSTIC AGGLOMERATION AND COMBINED SPRAY OPTIMIZATION OF FINE PARTICLES AT LOW CONCENTRATION

TAO Wei; XU Chao; ZHONG Zhao-ping

doi:10.13205/j.hjgc.202010026

Volume 38 Issue 10

Nov. 2020

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TAO Wei, XU Chao, ZHONG Zhao-ping. EXPERIMENTAL STUDY ON ACOUSTIC AGGLOMERATION AND COMBINED SPRAY OPTIMIZATION OF FINE PARTICLES AT LOW CONCENTRATION[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(10): 162-168,127. doi: 10.13205/j.hjgc.202010026

Citation:

TAO Wei, XU Chao, ZHONG Zhao-ping. EXPERIMENTAL STUDY ON ACOUSTIC AGGLOMERATION AND COMBINED SPRAY OPTIMIZATION OF FINE PARTICLES AT LOW CONCENTRATION[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(10): 162-168,127. doi: 10.13205/j.hjgc.202010026

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EXPERIMENTAL STUDY ON ACOUSTIC AGGLOMERATION AND COMBINED SPRAY OPTIMIZATION OF FINE PARTICLES AT LOW CONCENTRATION

doi: 10.13205/j.hjgc.202010026

School of Energy and Environment, Southeast University, Nanjing 210096, China

Received Date: 2019-11-19

Abstract

Abstract

Fine particles are inflicting great harm on human health due to their small particle size and absorption of hazardous components on them. But the conventional dust remover cannot remove it effectively. Sound wave can effectively increase the collision and agglomeration of particles and increase the particle size of PM_2.5, which is a promising dust removal pretreatment technology. The acoustic frequency, sound pressure level (SPL), initial concentration and residence time are the main factors for the acoustic agglomeration efficiency. It was found that the effect was better under the action of low frequency sound wave, but the best agglomeration efficiency was only 43.07% under the action of pure acoustic agglomeration. The dust morphology before and after the experiment was compared by scanning electron microscope, and the agglomeration effect of acoustic wave on aerosol particles was verified. Then this study used spray as an auxiliary means to further improve the agglomeration efficiency and reduce the energy consumption of acoustic agglomeration. The effects of frequency, SPL and spray volume on the agglomeration efficiency were investigated. The agglomeration efficiency increased to 66.48% after spray. It showed that spray combined with acoustic agglomeration was an effective dust removal pretreatment technology.
- aerosol,
- acoustic agglomeration,
- particle size distribution,
- efficiency,
- optimization

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References(22)

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