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US 6,648,251 B1Granted
Device and method for disaggregating derived timber products
AssigneePfleiderer GmbH
InventorPatrick Chollet
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AssigneePfleiderer GmbH
InventorPatrick Chollet
Estimating the term…
The invention relates to a device for disaggregating pieces of derived timber products from cellulose and/or lignocel-lulose-containing products, especially particle boards, medium-density fiber boards and the like, with a transport device and at least one disaggregation container. The inventive device is also characterized in that the disaggregation container and the transport device are configured as at least one common densifier screw (1) with a housing-mounted outer shell and a driven shaft located therein. The shaft is provided with helices of a predefined pitch. The pieces of derived timber products are transported in the axial direction of the densifier screw (1) from a feed opening in the outer shell towards an outlet opening on the front side thereof in the axial direction (direction of transport). A feed opening (7) for vapor is provided in the outer shell between the inlet opening and the outlet opening.
Device for disaggregating pieces of derived timber products made from cellulose-containing and/or lignocellulose-containing materials, comprising a transport device and at least one disaggregation vessel, characterized in that the disaggregation vessel and the transport device are designed as at least three combined-function plug screw feeders arranged sequentially such that the discharge opening of the foremost plug screw feeder is connected in a pressure-sealed manner to the feed opening of the following plug screw feeder arranged in the direction of conveyance, the plug screw feeders having an outer casing and a drivable shaft located therein provided with helices of a predefined pitch, the pieces of derived timber products being conveyed in the plug screw feeders from a feed opening in the outer casing of a first of the plug screw feeders to an end-face discharge opening in the last of the plug screw feeders in the direction of conveyance, and characterized in that a delivery opening for steam is provided in the outer casing between the first plug screw feeder and the last plug screw feeder in the direction of conveyance.
Process for disaggregating pieces of derived timber products made from cellulose-containing and/or lignocellulose-containing materials, using a conveyance device as well as a disaggregation vessel, comprising conveying the derived timber products continuously through pressure-sealed, sequentially arranged plug screw feeders, thereby undergoing the action of shearing and frictional forces occurring in the plug screw feeder, and forcing steam into at least one of the plug screw feeders which is neither the first nor the last plug screw feeder at an overpressure of at least 2 bars.
Dependencies are inferred from the claim text.