Screening apparatus for fiber suspension
AssigneeVoith Sulzer Paper Technology North America, Inc.
InventorsKlaus Doelle, Robert J. Matz
Life of this patent
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Abstract
A screening apparatus for screening acceptable and rejectable material from a pressurized fiber suspension includes a housing and a rotor within the housing. The rotor has a top end. A screen basket is positioned generally concentrically around the rotor. A rotor blade ring is connected to the top end of the rotor and rotates with the rotor. A stationary defibering ring is positioned adjacent to the rotor blade ring.
Claims17
A screening apparatus for screening acceptable and rejectable material from a pressurized fiber suspension, said screening apparatus comprising:
- a housing;
- a rotor within said housing, said rotor having an end;
- a screen basket positioned generally concentrically around said rotor;
- a rotor blade ring connected to said end of said rotor and rotating with said rotor, said rotor blade ring including at least one rotor blade;
- and
- a stationary defibering ring positioned adjacent said rotor blade ring, said stationary defibering ring configured for defibering the pressurized fiber suspension, said end proximate to said stationary defibering ring.
In a screening apparatus, a method of screening acceptable and rejectable material from a pressurized fiber suspension, said method comprising the steps of:
- providing a housing;
- a rotor within said housing;
- a screen basket positioned generally concentrically around said rotor;
- a rotor blade ring connected to an end of said rotor and rotating with said rotor, said rotor blade ring including a plurality of blades extending radially outward;
- and a stationary defibering ring positioned adjacent and under said rotor blades, said stationary defibering ring configured for defibering the pressurized fiber suspension, said end proximate to said stationary defibering ring;
- transporting a fiber suspension into said housing above said rotor blade ring;
- breaking apart flakes in the fiber suspension using said rotor blade ring;
- defibering fibers within the fiber suspension using said defibering ring;
- and
- separating accepts from the fiber suspension using said screen basket.
A screening apparatus for screening acceptable and rejectable material from a pressurized fiber suspension, said screening apparatus comprising:
- a housing;
- a rotor within said housing, said rotor having an end;
- a screen basket positioned generally concentrically around said rotor;
- a rotor blade ring connected to said end of said rotor and rotating with said rotor;
- and
- a stationary defibering ring positioned adjacent said rotor blade ring, said defibering ring including a plurality of perforations.
A screening apparatus for screening acceptable and rejectable material from a pressurized fiber suspension, said screening apparatus comprising:
- a housing;
- a rotor within said housing, said rotor having an end;
- a screen basket positioned generally concentrically around said rotor;
- a rotor blade ring connected to said end of said rotor and rotating with said rotor;
- a stationary defibering ring positioned adjacent said rotor blade ring;
- and
- a vortex enhancer cup connected with said rotor blade ring.
In a screening apparatus, a method of screening acceptable and rejectable material from a pressurized fiber suspension, said method comprising the steps of:
- providing a housing;
- a rotor within said housing;
- a screen basket positioned generally concentrically around said rotor;
- a rotor blade ring connected to a top end of said rotor and rotating with said rotor, said rotor blade ring including a plurality of blades extending radially outward;
- and a stationary defibering ring positioned adjacent and under said rotor blades;
- transporting a fiber suspension into said housing above said rotor blade ring;
- breaking apart flakes in the fiber suspension using said rotor blade ring;
- defibering fibers within the fiber suspension using said defibering ring;
- separating accepts from the fiber suspension using said screen basket;
- providing a vortex enhancer cup connected with said rotor blade ring, said vortex enhancer cup including an axially extending cavity;
- and
- recirculating the fiber suspension through said axially extending cavity internally within said screening apparatus.
Dependencies are inferred from the claim text.