Abstract

The so-called back-corona hampers the separation of highly resistive particles in electrostatic precipitators. It is linked to the resistivity of the particle layers depending on the particle material, the particle size distribution but also the temperature and humidity of the surrounding gas. In this work, however, it was shown that electret properties are imposed on the particle layers deposited in an electrostatic precipitator. These, in turn, not only explain their non-ohmic properties in electrostatic precipitators but also allows measures to be taken to avoid back-corona.

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