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AssigneeHermann Finckh Maschinenfabrik GmbH & Co.
InventorsErich Czerwoniak, Emil Holz, Hagen Wilhelm Hutzler, Jochen Gustav Pfeffer
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An apparatus for processing fiber suspensions containing usable fibers and suspended dirt particles to be separated from the usable fibers, the specific weight of the particles differing distinctly from that of the usable fibers, is described. The apparatus comprises a drum-shaped outer housing having (i) and inflow end accommodating a body rotationally symmetric to the housing axis and being provided with a tangential inlet pipe for the fiber suspension to be processed, and (ii) an outflow end being provided with an axial outlet pipe for a lightweight dirt component of the suspension and an outlet pipe for a usable component of the suspension. In order to also separate a heavy dirt component of the suspension, and to minimize cost due to wear, the housing and the outlet pipe for the usable component are stationary, the rotationally symmetrical body is a rotor rotationally drivable about the housing axis, and a separating wall rotationally symmetrical with the housing axis is provided for defining an outer annular chamber between the circumferential housing wall and the separating wall. The annular chamber is open at its one end facing the rotor and is provided at its other end with a radial outlet pipe for heavy dirt particles. The separating wall further circumscribes an inner annular chamber circumscribing the outlet pipe for the lightweight dirt component, and the outlet pipe for the usable component opens into the inner annular chamber.
An apparatus for processing fiber suspensions, said fiber suspensions containing particles to be separated off from the usable fibers of the suspension, the specific weight of said particles differing distinctly from that of said usable fibers, comprising an essentially drum-shaped outer housing accommodating in the zone of its one inflow end a body which is essentially rotationally symmetrical in relation to the housing axis, said outer housing being provided with an inlet for the fiber suspension to be processed and accommodating in the zone of its other outflow end a stationary outlet pipe concentric with the housing axis for a lightweight dirt portion of the suspension containing particles to be separated off and having a specific weight less than the specific weight of said usable fibers, and said outer housing being provided with an accepted stock outlet for an accepted stock portion of the suspension containing essentially usable fibers, and further comprising a rotary drive for generating in the annular chamber between said outer housing and said rotationally symmetrical body a flow component which is rotatory in relation to the housing axis, wherein said outer housing and said accepted stock outlet are stationary, and said rotationally symmetrical body is in the form of a rotor rotationally drivable about said housing axis, wherein a separating wall rotationally symmetrical with said housing axis is provided, said separating wall forming together with a circumferential wall of said outer housing an outer annular chamber which is open at its end facing said rotor and is closed in the opposite direction, said outer annular chamber being provided at an axial distance from its open end with an outlet for a heavy dirt portion of the suspension containing particles to be separated off and having a specific weight greater than the specific weight of said usable fibers, and wherein said accepted stock outlet communicates with the outflow end of an inner annular chamber located between said separating wall and said outlet pipe for lightweight dirt.
Dependencies are inferred from the claim text.