BigPatents India

A filter assembly includes a tank and a filter drum rotatably disposed inside the tank. The drum has an inner surface and an outer surface and is provided long the outer surface with a plurality of recessed compartments or cells, each of the compartments being provided with a filter element. A pressure let-down valve is disposed in the tank, the pressure let-down valve communicating sequentially with the compartments or cells during rotation of the drum, to draw off an overpressure in the compartments or cells. In addition, a blowback valve is disposed in the tank downstream of the pressure let-down valve as defined by a direction of rotation of the drum. The blowback valve communicates sequentially with the compartments or cells during rotation of the drum after the compartments or cells have passed the pressure let-down valve. This apparatus enables discharge of solids from the compartments or cells at atmospheric or ambient pressure. Drawing : 2 Sheets Total Pages: 18 Fig. 1