Coaxial feeder

Details Coaxial feeder Coaxial feeder

B - Operations, Transporting

02

C

92/43

B02C 7/11 (2006.01) D21D 1/30 (2006.01)

Patent

CA 1107113

IMPROVED COAXIAL FEEDER ABSTRACT OF THE DISCLOSURE: A coaxial feeder for connection to the inlet of a disc refiner include a channel defining means which contains a bladed screw the blade of which has a relatively short axial length and is housed to position coaxially of the discs, to which it feeds material for refining purposes, and in concentric spaced relation to the wall structure which bounds said channel. The material to be refined is introduced to the down side of the screw blade. At the outer periphery of the blade, at the lowermost limit of its travel, is a bar or plate-like control device which is substantially coextensive with the blade and arranged to specifically direct material to the apace between the. discs of the related refiner with minimal interference or disruption. The control device presents a surface to the material moved on the down side of the screw blade which effectively inhibits bypass of material to the upside of the blade, having regard for the direction of its rotation in use. The arrangement assures a relatively free backflow of steam from the refiner discs along the upside portion of the blade, to vent to an expansion chamber rising vertically of the screw, which chamber houses means for controlling the inflow of material to the down side of the screw blade in generally bypassing relation to any significant portion of the backflowing vented steam.

336945

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