Method and Apparatus for Separation of Particles From a Flow of Gas

An apparatus for the separation of particles from a flow of gas, comprising:

• a unit for charging the particles in the flow of gas in an ionization phase, and a sedimentation unit, the sedimentation unit comprising electrically-conductive surface elements upon which the ionized particles in the flow of gas can be deposited during their passage past the surface elements, wherein the sedimentation unit comprises:
• a rotor in a centrifugal separator, which rotor has a plurality of surface elements with intermediate gas flow gaps and is mounted in a surrounding casing in such a way that it can rotate, which surface elements delimit a central inlet shaft in the rotor that is connected to an inlet for unclean gas, that is in communication with the flow gaps between the surface elements and with a space in the casing surrounding the rotor;
• and
• an electronic unit for generating an electrical field between opposing faces of the adjacent surface elements, so that during the passage of the flow of gas through the gaps, the particles that were ionized in the charging unit are trapped on a face of the surface elements by at least an electrostatic attraction force, whereupon the particles that were trapped on the inside of the surrounding casing after the centrifugation can be led out from the casing via an outlet for particles, while the gas that has been cleaned of particles can flow out from the casing via an outlet for gas.

An apparatus for the separation of particles from a flow of gas, comprising a unit (88, 92) for charging the particles in the flow of gas by ionization, and a sedimentation unit, comprising electrically-conductive surface elements (90), upon which the ionized particles in the flow of gas can be deposited during their passage past the surface elements, characterized in that the unit for sedimentation of the electrically-charged particles comprises:

• a rotor (14h) in a centrifugal separator, which rotor has a plurality of surface elements (90) with intermediate gas flow gaps and is mounted in a surrounding casing in such a way that it can rotate, which casing has an inlet for the flow of gas that is to be cleaned, and which rotor has a central axial shaft, that is in communication with the gas flow gaps and with an outlet for clean gas in the casing;
• and
• an electronic unit for generating an electrical field between opposing faces of the adjacent surface elements, so that during the passage of the flow of gas through the gaps, the particles that were ionized in the charging unit (88, 92) are trapped on a face of the surface elements (90) by at least an electrostatic attraction force, whereupon the particles that were trapped on the inside of the surrounding casing as a result of the centrifugation, can be led out from the casing via an outlet for particles, while the gas that has been cleaned of particles can flow out from the casing through the outlet for gas via the central shaft.