Patent ID: 8387363

Claim:
An arrangement for removal of particulates in a gas flow, comprising a non-plugged particulate filter containing a plurality of gas passages, each gas passage being in a form of an open, non-plugged channel having a longitudinal axis that is at least partially ringed by at least one porous, solid filter wall so that the filter wall is disposed laterally of the longitudinal axis and defines at least one longitudinally extending wall of the gas passage, the gas passage defining an inlet for the gas flow including the particulates and an outlet for the gas flow from which particulates have been removed, the inlet and the outlet being arranged along the longitudinal axis, wherein the same gas flow is arranged to pass the inlet and outlet, and means for exposing the gas passages to sound at frequencies below around 100 Hz that induces gas movements in a direction towards the filter wall, wherein the sound exposure means is connected to a portion of the gas passages in a region where the longitudinal axis of each gas passage is at least partially ringed by the filter wall and is arranged to expose the portion of the gas passages to sound with an intensity and frequency that are suitable for moving particulates in a gas flowing in the gas passages at least one of to and at least partly through the filter walls.