Screw device for dewatering and defibrating ligno-cellulose material
AssigneeAndritz-Patentverwaltungs-Gesellschaft m.b.H.
InventorsPeter Mraz, Heinrich Munster
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Abstract
The invention relates to a device for dewatering and defibrating ligno-cellulose material using a screw. It is primarily characterized by a defibrating element (9) directly adjoining the body (2') of a first screw.
Claims28
Device for dewatering and defibrating lingo-cellulose material using a rotatable dewatering screw in which the material is dewatered and compacted and which is directly followed by defibrating elements defining a refining gap therebetween, wherein the improvement comprises that a said defibrating element is rigidly connected to the dewatering screw for co-rotation therewith and said defibrating element has a conical shape which decreases in diameter along the flow direction of the material.
Device for dewatering and defibrating ligno-cellulose material as the material flows in a direction from input to output ends of the device, comprising:
- a dewatering section having a screw formed on a screw shaft rotatable about a screw axis, and situated within a screw casing for dewatering and compacting the ligno-cellulose material;
- and
- a conical defibrating element rigidly extending from the screw shaft along the screw axis and having a diameter which decreases in the direction of material flow.
Dependencies are inferred from the claim text.