Patent ID: 7922798

Claim:
A granulator device for the treatment of powdered material comprising a container, in which there is a chamber for treatment of the powdered material using a fluid flow fed into the chamber; filtering means for filtering the inside of the chamber, the filtering means being located in the chamber and comprising at least one filter fixed inside the chamber and having a cylindrical metal mesh filtering wall having an inner surface; and means for cleaning the filtering means which can be activated during maintenance operations, the cleaning means comprising at least one element located inside the filter, the element being rotatably mounted about a vertical axis X so that it can rotate inside the filter about the axis X when driven by actuator means, the element supporting diffuser means designed to diffuse a service fluid onto the inner surface of the cylindrical filtering wall in order to eliminate impurities trapped in the filter wall; the diffuser means comprising a plurality of nozzles arranged one above the other, the cleaning means also comprising opening means for temporarily opening at least one portion of the filter to allow the service fluid to flow out of the filter together with the impurities.