Centrifugal screening apparatus

Centrifugal screening apparatus

• including:
• a housing;
• a screen assembly mounted for rotation in said housing and including a base-of-spoke piece and a substantially frustoconical screen member having an inner screening surface and removably secured by its base to the base-of-spoke piece, the base of spoke piece cooperating with the housing to substantially divide the housing into housing portions receiving filtrate passing through the screen member and product passing through the base-of-spoke piece respectively;
• a scroll assembly having a plurality of substantially helical scroll vanes and mounted for rotation within said screen member with an edge of each said vane lying in selected proximity to said screening surface;
• drive means selected to differentially drive the rotation of said screen assembly and said scroll assembly about a machine axis;
• and
• an inlet assembly supported on said housing and including an inlet body defining a substantially annular inlet space substantially coaxial with and opening in to an open apical end of said screen member and a material supply conduit delivering said material to be screened to said annular space, said material supply conduit being aligned in a tangent to said annular space selected to deliver said material to said screening surface substantially in the direction of rotation of the screen assembly.