Experimental Study Of Combined Acoustic Agglomeration With Turbulence Coalescence To Remove Fine Particles

With the atmospheric pollution of particulate matter continues to deteriorate,the removal efficiency of fine particles of existing conventional dust remover is too low to meet even more stringent environmental requirements.In order to improve the removal efficiency of fine particles,scholars have proposed flue gas pretreatment technology.Acoustic agglomeration is a flue gas pretreatment technology,particles in the flue gas collide with each other and agglomerate to form larger particles in a high-intensity sound field,thus improving the removal efficiency of the dust remover.Acoustic agglomeration technology has the advantages of simple structure and applicability.Therefore,acoustic agglomeration is considered as one of the most promising dust removal technologies.Considering the shortcomings of the existing experimental study of acoustic agglomeration,the actual fly ash of the power plant is taken as the research object,and an acoustic agglomeration experimental bench is set up to study the influence of the sound field intensity and the sound frequency on the agglomeration efficiency of fine particles.Experimental results show:the optimum frequency of acoustic agglomeration is 1800?2300Hz in the sound field conditions of 120dB,the maximum agglomeration efficiency can reach 25%?30%.The agglomeration efficiency first increases and then decreases with the increase of sound pressure level in the sound field conditions of 1300Hz.Reaching the maximum at 120dB,PM2.5 agglomeration efficiency reached a maximum of 21.9%,PM10 agglomeration efficiency reached a maximum of 24.8%.Large particles will break due to their own structure and other reasons in the high-intensity sound field.This paper analyzes the force of the particles in the sound field,and considered the impact of fragmentation to improve the model based on the orthokinetic interaction agglomeration model.This paper explores the combination of acoustic agglomeration and turbulence coalescence to remove fine particles.In this paper,the simulation of the sound field and flow field in the reunion room is analyzed with the experiment.Explored the feasibility and improve direction of the technology,this is of great significance for the engineering application of fine particulate emission control technology.The experimental results show that adding the sound field into the turbulence coalescence can significantly increase the agglomeration efficiency of the fine particles.