Analysis of a novel insulating conveyor-belt tribo-electrostatic separator for highly humid granular products

I. Benaouda , M.E.M. Zelmat , R. Ouiddir , L. Dascalescu (1, 2) , A. Tilmatine

1 PPrime [Poitiers] - Institut Pprime [UPR 3346]
2 EFD - Électro-Fluido-Dynamique [Institut Pprime]

The objective of this work is to describe a new configuration of tribo-electrostatic separator equipped with an insulating rubber belt conveyor, to facilitate the processing particles saturated with moisture. The insulating belt is continually charged by corona discharge produced by a fine-wire electrode, placed at a distance of 5 mm above it. The experiments were carried out under conditions of high humidity using samples of HDPE and PP particles. Separation experiments have shown that when the belt is charged by corona, more than 50% of the particles were separated with purity higher than 95%.

Mots clés: Electrostatic processes; Triboelectricity; Tribo-electrostatic separator

Domaines: Mécanique des fluides [physics.class-ph]; Matériaux et structures en mécanique [physics.class-ph]; Acoustique [physics.class-ph]; Automatique / Robotique; Electromagnétisme; Milieux fluides et réactifs; Energie électrique; Thermique [physics.class-ph]; Vibrations [physics.class-ph]; Physique mathématique [math-ph]; Physique Quantique [quant-ph]; Acoustique [physics.class-ph]; Biomécanique [physics.med-ph]; Matériaux; Polymères

I. Benaouda, M.E.M. Zelmat, R. Ouiddir, L. Dascalescu, A. Tilmatine. Analysis of a novel insulating conveyor-belt tribo-electrostatic separator for highly humid granular products. Journal of Electrostatics, 2019, 100, pp.103357. ⟨10.1016/j.elstat.2019.103357⟩. ⟨hal-02285944⟩