A New Electrostatic Dispersion Method for Fine Powder in Air

Abstract

A new electrostatic dispersion device was designed to reduce the agglomeration of fine powder in the air. This device is using the repulse force between particles which charged the same charge to prevent the particles from reuniting. The effects of charge voltage, particle size, the distant between electrode, and moisture content on the dispersion degree of the powder are discussed. The invalidation time of the electrostatic dispersion is also highlighted in the paper. The results show that the electrostatic dispersion is an effective method for the fine powders in the air. The charge voltage is the most important parameter for the dispersion. Middle size particle got best dispersion. When the distance between the electrodes is 24cm, the dispersion degree reaches the maximum. The humidity of the powder not only affects the charge of the powder, but also affects the dispersion degree of the powder.

Particle engineering of excipients: A mechanistic investigation into the compaction properties of lignin and [co]-spray dried lignin

“…Poured bulk density, conditioned bulk density and the compressibility of both as-received materials and spray/co-spray dried lignin were measured and respective values are given in [38]. Subsequent repulsive Coulomb forces between adjacent particles may aid in lowering measured bulk densities [39]. Measured ρ poured values appear highest for GR150 followed by ARL and paracetamol, and appear lowest for SDLS0.…”

Experimental study on DC corona charging characteristics of powder particles with different properties

“…According to the conclusion of the above study, the charge structure, charge voltage, and charge environment all have a large influence on the charge results, and the charge characteristics of different materials also differ. Xu et al [13] conducted charging experiments on copper powder and silicon carbide abrasives of different particle sizes and found that the higher the charge level was for the same powder the better the dispersion. Zhang et al [14] charged sand particles from 0 to 125 μm and studied the effect of charged sand on breakdown voltage, and found that breakdown voltage was related to electrode spacing.…”