Pulp refining apparatus

Details Pulp refining apparatus Pulp refining apparatus

1988-01-22

1989-10-17

Eley, Timothy V.

Solid material comminution or disintegration

Apparatus

Cooperating comminuting surfaces

241260, 241261, 2412611, 241296, B02C 712

Patent

active

048741361

ABSTRACT:
A pulp refiner has a pair of refiner members with opposed surfaces each including alternating grooves and lands extending between a central port and a peripheral port through which a pulp slurry is passed. The edges of the lands define work edges. Drive means are provided for rotating at least one of the members relative to the other. The grooves and lands defined in at least one member extend from the central to the peripheral port in a spiral pattern having a direction on the member from one port to the other relative to the direction of rotation which will provide a screw pump action to the pulp slurry as it advances from one port to the other. The pitch of the spiral lands forming the work edges on the opposed surfaces of the respective refiner members is such that the intersection of the opposed work edges defines an obtuse angle on the downstream side of the lands relative to the direction of rotation and flow such that pulp fibers suspended in the pulp slurry will be subjected to a pinching action.

REFERENCES:
patent: 76270 (1868-03-01), Taggart
patent: 293047 (1884-02-01), Machey
patent: 1705379 (1929-03-01), Sheppard, Jr.
patent: 4039154 (1977-08-01), Peterson

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