Beloit Corporation

Beloit Technologies, Inc.

Luigi Silveri

Stavros Paraskevas

William A Gero

Michael A McCool

Goda Rangamannar

Ashok K Nanda

A pressurized dynamic pulp washer including an annular hollow housing in which the stock is driven axially along a plurality of stationary, annular, coaxial wash filters in axially reversible directions, with an annular rotatable shell between the wash filters to urge liquid through openings in the filters, to generate axial, radial and circumferential velocities in the slurry to create localized pulses in the slurry to urge liquid through the filters with wash liquid being introduced to replace liquid filtered from the fibers in the slurry.

Multiple filter dynamic washer

A system of processing baled secondary fibre furnish is provided. The system includes the steps of breaking the baled furnish, dry screening the furnish to remove abrasive contaminants, and then repulping the dry screened furnish.

Apparatus for secondary fibre processing

A method of processing baled secondary fibre furnish is provided. The method includes the steps of breaking the baled furnish, dry screening the furnish to remove abrasive contaminants, and then repulping the dry screened furnish.

Process for secondary fibre processing

A method and apparatus for deinking a fibre stock or slurry. In order to optimize the separation process the invention proposes to independently control the air injection phase, the mixing phase, and the separation phase by splitting them into separate steps. Thus, there is provided a separation cell which is fed with slurry from an inlet. Air is introduced into the slurry before entry into the separation cell and before entering a mixing section which mixes the air and slurry before entering the separation cell. The air is introduced under pressure by way of a porous sintered sleeve, while the mixing is achieved by the provision of three turbulence discs in the preferred embodiment. Alternative turbulent generating means may be employed. The mixing ensures contact of the ink with the air bubbles which separate out in the separation cell and rise to the surface as a foam. The foam is removed by suction, while the deinked fibre slurry is drawn off from the tank by means of a weir or stand pipe. A separation plate isolates the foam from the draw off section of the tank. It is preferred that the separation cell is divided into a plurality of cells which are fed from a respective inlet, each having a respective said air inlet and mixing section.

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Pittsfield, MA, United States of America

Luigi Silveri