Measurement and Control of Electrostatic Charges on Solids in a Gaseous Suspension. Technical Progress Report No. 6

摘要

Measurements of mean particle charges and charge distributions on High Volatile C Bituminous (HVCB) coals in a 51 mm ID grounded copper pipe loop have been made with the upgraded charge measuring and signal processing system. In all experiments conducted, electrostatic charges of coals exhibits a duel polarity. This is believed to be due to the non-uniformity of materials and the complexity of chemical composition contained in coals. The effect of particle concentrations (loadings) on the electrostatic charges was found to be of little importance. The implementation of the new charge measuring and signal processing system facilitated the measurements and control of electrostatic charges on coals and other powder materials. The signal processing procedure and system calibration have been established. 6 refs., 3 figs., 1 tab. (ERA citation 11:015549)