Rotor with forward-swept struts for pressure screen cylinders

A method for removing solid contaminants from a solid suspension or solid slurry, the method comprising:

• introducing the solid suspension or solid slurry to a pressure screening system comprising a pressure screen cylinder having a plurality of openings, a rotor disposed within the pressure screen cylinder, and a drive motor operatively coupled to the rotor, where the drive motor is configured to rotate the rotor relative to the pressure screen cylinder;
• rotating the rotor relative to the pressure screen cylinder, and collecting an acceptable solid suspension from the plurality of openings of the screen cylinder, wherein:
• the rotor comprises a cylindrical hub, at least one foil spaced radially outward from the cylindrical hub, and at least one strut coupling the at least one foil to the cylindrical hub, wherein the at least one strut is a forward-swept strut having a forward edge;
• contact of the solid suspension or solid slurry with the pressure screen cylinder causes at least a portion of the solid suspension or solid slurry to pass through the plurality of openings;
• rotation of the rotor causes the plurality of foils to produce pressure pulses that dislodge solid contaminants and fibers matted to an inner surface of the pressure screen cylinder;
• and
• the forward-swept struts create flow fields that move solid contaminants and fibers inboard and prevents solid contaminants and fibers from collecting on the forward edge of the plurality of struts and leading edges of the plurality of foils.