Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6973465 | Journal of Loss Prevention in the Process Industries | 2014 | 4 Pages |
Abstract
This paper is a report on the relationship between the charge amount (charge to mass ratio, q/m) of polypropylene (PP, 2-3 mm) granules and the frequency of electrostatic discharges that occur while loading a metal silo. The feedback control system was used in order to control the q/m of PP granules. The electrostatic discharges inside the silo were also observed using a conventional image-intensifier system. The charging control range for PP granules was from 0 to â12 μC/kg in the q/m. The results obtained from the experiments show that (1) two kinds of electrostatic discharges were clearly observed inside a metal silo while loading PP granules, i.e., brush discharges and incendiary bulk surface discharges; (2) the number of brush discharges and incendiary bulk surface discharges increased with the increase in the q/m of PP granules, almost reaching saturation; and (3) brush discharges and incendiary bulk surface discharges began to occur at the â1.16 μC/kg and â2.33 μC/kg points in the q/m, respectively, in this study.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Health and Safety
Authors
Kwangseok Choi, Tomofumi Mogami, Teruo Suzuki, Mizuki Yamaguma,