Quantification of particle separation using electrostatically charged spray mist in a dust chamber--颗粒学报PARTICUOLOGY

Zillgitt, M., & Schmidt, E. (2021). Quantification of particle separation using electrostatically charged spray mist in a dust chamber. Particuology, 58, 92-98. https://doi.org/10.1016/j.partic.2021.01.019

Quantification of particle separation using electrostatically charged spray mist in a dust chamber

Marcel Zillgitt ^*, Eberhard Schmidt

Institute of Particle Technology, Rainer Gruenter Straße, Building FF, Campus, Freudenberg, Bergische Universität Wuppertal, 42119 Wuppertal, Germany

10.1016/j.partic.2021.01.019

Volume 58, October 2021, Pages 92-98

Received 27 April 2020, Revised 28 December 2020, Accepted 26 January 2021, Available online 22 March 2021, Version of Record 3 April 2021. crossmark-logo

E-mail: zillgitt@uni-wuppertal.de

Highlights

• Experimental study on an electrostatically assisted wet particle separation.

• Evaluation of laser light attenuation calculating particle size distributions.

• Investigation on sedimentation time of particle–droplet mixtures.

• Main goal: increase in particle–droplet binding through electrostatic forces.

Abstract

In order to improve the efficiency of reducing fine dust emissions from diffuse sources, the commonly used water mist can be electrostatically charged. Thus, the attraction between particles and droplets increases due to electrostatic field forces. In the experimental investigations carried out, an electrostatic two-fluid nozzle was used to generate a charged spray mist according to the principle of charging by induction. In a chamber, dispersed dust was precipitated with the spray mist, while detecting the laser light attenuation. By means of comparative measurements it could be shown that faster sedimentation and separation takes place through electrostatic attraction. Parameter variations regarding the use of compressed air and water were investigated and the sedimentation time of the particle–droplet mixture in the chamber was shown. A size distribution was then calculated from the laser light attenuation, which shows that the proportion of small particles decreases with spray application. Furthermore, the influence of the polarity of droplets and solid particles on the reduction measure was determined.

Graphical abstract

Keywords

Dust separation; Spray mistElectrostatic; Dust chamber; Laser light attenuation; Charging by induction

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