Particle reduction by electrostatically charged water spray

M. Zillgitt *, E. Schmidt, University of Wuppertal, Germany

Within the scope of the BMBF funding program for resource and energy efficiency a new water dispersing system is developed. The aim is to increase the probability of precipitation while simultaneously reducing water consumption. Therefore the chosen approach uses electrostatic charging of the generated water mist. The wetting of the dust is then based on the impaction and the electrostatic attraction between droplets and solid particles.

In order to charge the water spray electrostatically, a high-voltage field is placed near the nozzle outflow aperture. Adaptions are developed which can transfer charges to the droplet collective during atomization. In preliminary tests, the feasibility of charging with individual drops is tested, so that the results are subsequently transferred handling with two-fluid nozzles. The newly developed water dispersion system is then deployed in a wind tunnel. For this purpose, dust particles of a certain size distribution and defined material properties are generated. Ultimately they are conditioned by the use of the water spray and thereby precipitated. The deposition of particles with and without using electrostatic interferences is compared and thus the capacity of the industrial use is estimated...

Session: G11 - Short Oral + Poster Presentations II
Day: 14 March 2018
Time: 14:45 - 16:45 h

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