METHOD AND APPARATUS FOR SEPARATION OF PARTICLES FROM A FLOW OF GAS

摘要

A method and apparatus for the separation of particles from a flow of gas, where both large, heavy and small, light particles can be separated off from the gas by means of the combined effect of an electrostatic attraction force and a centrifugal force in a centrifugal separator (10) of the type that comprises a rotor (14) that has a plurality of adjacent surface elements (16) with intermediate gas flow gaps (48) and that is mounted in such a way that it can rotate in a surrounding casing (12), which casing has an inlet (18) for unclean gas and an outlet (22) for clean gas and an outlet (24) for separated-of f particles. A charging unit (44) ionizes the particles upstream of the rotor (14) . An electrical field is generated between adjacent surface elements (16) of the rotor in order to attract the ionized light particles towards a face of the surface elements by means of the electrostatic force. By means of the centrifugal force created by the rotor, the particles that have accumulated on the surface elements are thrown towards the inside of the casing and are led out through the outlet.