2016 Volume 9 Issue 2 Pages 55-60
This paper reports the validity of the vibration-type electrostatic field sensors with respect to the electrostatic charging measurements of pneumatically transported powders. The pneumatic powder transport facility and polypropylene (PP) powders were used for this study. The feeding mass and velocity of the PP powders were 0.4 kg/s and 10.6 m/s, respectively, and a Faraday cage was set inside a silo. The value of the electrostatic field and the charging amount of the PP powder that was controlled by a DC-type ionizer were compared. It was observed that the two were clearly in direct correlation. The values obtained from the electrostatic field sensor were similar to those that were transferred from the charging amount obtained from the Faraday cage method. The electrostatic field sensor generally performed well and its validity was confirmed.
