Investigation of particles coagulation with two methods influencing the acoustic field

Abstract

Reduction of the dispersion of various pollutants is the basic problem addressed in environment protection. Metal processing industry, solid fuel burning and diesel engine emissions account for the bulk of the ejections into the atmosphere. Due to their extremely small sizes the particles can travel long distances through the atmosphere. Collection of pollution particles measuring less than 10 μm in diameter by conventional cleaning devices (cyclones, scrubbers, etc.) is a complex task. Purification of air from extremely small particles requires the application of complex, multi-step air cleaning systems. New methods facilitating effective reduction of solid particle pollution are sought for perpetually. This article describes our investigation into the reduction of environment pollution with solid particles (aerosol) by means of coagulation. For our experimental research special stands of two structures containing measuring equipment were used. The principles of operation of the experimental stands and the methodologies of running the experiments are provided. Experimental investigation into the effectiveness of coagulation of small-diameter solid particles depending on the acoustic field impact angle was performed. For exciting the acoustic field one or two acoustic generators were used depending on the stand structure. With two acoustic generators switched on the particle impact angle was changed. The findings show the dependence of particle coagulation on the frequency, amplitude and impact angle of acoustic signal. Comparison and analysis of research findings is provided.