Non-static Collection Process of the electrostatic Precipitator

Abstract

In order to describe non-static dust collection in electrostatic precipitator comprehensively and propose a non-static dust collection theory on it, the leading accumulation and release of the dust layer electronic charge on the collection plate was researched according to the electrostatic principle. The calculation equation of the dynamic dust collection electric-field intensity that changes with the dust layer thickness was deduced. Furthermore, the equation of the dynamic velocity of the charged particle could also be obtained. And finally, the non-static electrostatic dust collection theory was proposed. The results indicated that the particle velocity was related to many factors such as particle specific electric resistance, applied voltage and dust layer thickness during electrostatic dust collection process. The collection efficiency decreases with the increasing of the particle specific electric resistance. The collection efficiency can reach a maximum value when an optimal applied voltage is got. Multiple laboratory experiments were completed on many kinds of particles with different specific electric resistance. The experiment results obey to the theoretic results. The non-static dust collection theory could explain contradictive points between the actual electrostatic dust collection process and the traditional electrostatic dust collection theory and provided a scientific theoretical foundation for the design of the electrostatic precipitator and the decision of its operating parameters.