Theoretical analysis and measurement of electrostatic charge distribution of fine particles in gas-solid's pipe flow

The electrostatic charge distribution of fine particles in gas-solids pipe flow is analyzed using a model based on the charge transfer caused by particle impacts on the wall, which takes into account three probability density functions: (i) the number of collisions of a particle with the wall, (ii) initial particle charge, and (iii) the impact charging factor characterizing the transferred charge. These functions individually affect the electrostatic charge distribution, and therefore key parameters on the particle electrification can be determined from the charge distribution. By analyzing the key parameters, the states of the particle electrification are evaluated quantitatively.