System for measuring micro-fine pulverized-coal particle charge-mass ratio distribution

Abstract

The invention discloses a system for measuring micro-fine pulverized-coal particle charge-mass ratio distribution. The system comprises a particle friction charging device, a particle electrical field separation device and a particle charge-mass ratio measurement device, wherein the particle friction charging device comprises a feeding cylinder and a vibrating feeder, and the feeding cylinder is connected with the feed end of the vibrating feeder; the particle electrical field separation device comprises two insulating plates with adjustable space, a particle separation chamber is formed between the insulating plates, electrode plates are arranged on the outer sides of the insulating plates and connected with a high-voltage power source through wires, a feeding funnel is arranged at the upper end of the particle separation chamber and connected with the discharging end of the vibrating feeder; and the particle charge-mass ratio measurement device comprises a plurality of charge-mass ratio measurement components arranged at the bottom end of the particle separation chamber transversely and densely. The system not only can be used for measuring bipolar charge of clean coal and a proportion of positive and negative live parts, but also can be used for measuring the charge condition of non-sorted coal particles, so that the micro-fine pulverized-coal particle charge-mass ratio is accurately measured.

Description

technical field [0001] The invention relates to the measurement of the triboelectric charge of fine coal particles, in particular to a measurement system capable of accurately measuring the distribution of the charge-to-mass ratio in the particles. Background technique [0002] Tribostatic separation technology is a clean, environmentally friendly, efficient and cheap dry separation technology for sorting and purifying fine-grained minerals. Tribocharging realizes the separation of particles according to the polarity and quantity of the charges on the particles in the high-voltage electrostatic field with different moving speeds and moving directions. Therefore, after studying the triboelectric charge of the material, the charging situation of the particles has very guiding significance for the triboelectric selection of the particles. However, due to the fact that the charge is not directly measured, and the charge will dissipate, etc., the determination of the charge-to-m...

AI Technical Summary

Problems solved by technology

The traditional Faraday method for determining the charge-to-mass ratio of a substance can only measure the static charge of the measured material, which is the result of positive and negative charges canceling each other out, so it cannot reflect the real situation of the charge of the substance itself.

Images