Filter apparatus and a method of cleaning filter elements thereof

Claim 1

A filter apparatus, comprising an elongated shaft; a plurality of filter elements mounted on said shaft and spaced from one another in direction of elongation of said shaft, said filter elements being provided with a filtering material upon a surface of which a cake is deposited during a filtering process; means for cleaning said filter elements, including a source of a cleaning medium, which has a manifold and a plurality of conduits mounted on and communicating with said manifold and each having an end portion, a plurality of nozzle elements facing towards said surfaces of said filtering material of said filter elements, and each carried by the end portion of a respective one of said conduits, and adjustable means for elevating the pressure of said cleaning medium when the same is supplied to said nozzle elements so as to supply the medium to said nozzle elements under a desired adjustably elevated pressure, said manifold together with said conduits and said nozzle elements being turnable relative to said surfaces of said filtering material of said filter elements; means for turning said manifold together with said conduits and said nozzle elements relative to said surface of said filtering material of said filter elements; and means for rotating said filter elements about the elongated axis of said shaft during ejecting the cleaning medium towards said surfaces under a desired elevated pressure to thereby remove the cake from said surfaces and thereupon also clean the filtering material of the filter elements.