J. M. Voith Gmbh

Hans O Henrich

Theodor Bahr

Helmut Thumm

Ernst Bottger

Richard Suttinger

A substance kneader, specifically for cellulose fiber suspensions, with kneading elements arranged at the periphery of a rotor encased in a housing. Two drum type rotor parts and a rotor part disposed in between feature a feed worm conveyor for each rotor part. In the area between facing ends of the worm conveyors, and symmetric to this area, are the inlet openings of the housing. On the ends away from each other, of the rotor parts, are the outlet openings of the housing. The outlet openings are each coordinated with delivery worm conveyors having variable-RPM drive for control of throughput and/or dwell time of the substance to be kneaded.

Kneader for the treatment of fibrous pulp suspensions

The invention concerns a pulp grinder in which feed devices force the wood against the grinder stone and in which there is an elevated level of water in the grinding zone. Sealing devices or plates extend between the walls of the wood-supply chutes or pusher chambers and the grinder stone to keep the water level high only in the grinding zone. The sealing plates are adjustable for controlling the liquid level in the grinding zone.

Pulp grinder with liquid retention

The disclosure relates to apparatus for producing mechanical wood pulp of the type having a grinding stone with at least one wood supply chute in which the wood which is to be ground is pressed onto the grinding stone. A trough or a collecting channel is placed underneath the grinding stone. A water supply device moistens the grinding stone at the grinding zone. At least one closed water tank is set up on the grinding stone in front of the wood supply chute, viewed in the direction of rotation of the grinding stone. The water tank is sealed at least on the side furthest away from the supply chute. The tank has a supply line for pressurized water and has outlet holes directed toward the surface of the stone. Preferably, sealing of the water tank is effected by a sealing plug at the grinding stone which plug is adjustable with respect to the grinding stone to accommodate wear of the plug from the stone.

Apparatus for producing mechanical wood pulp

The disclosure concerns both a process and an apparatus for producing wood pulp. Wood to be pulped is fed into a housing where the wood is ground. The housing is pressurized above atmospheric pressure. Water at a temperature over 100.degree. C. is fed to the pressurized housing in the grinding zone. The wood pulp produced by grinding is collected and is conveyed through a worm conveyor which causes the water in the pulp to be removed therefrom, while the pulp and the water removed therefrom are maintained at elevated pressure. The water under pressure is returned to the grinding zone in the housing. The wood pulp is thereafter returned to atmospheric pressure. Various pressure lock devices for transmitting the wood pulp from being under pressure to atmospheric pressure are disclosed including a nozzle, a pressure lock device, a hydrocyclone and/or a disc refiner.

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Heidenheim, Germany

Hans O Henrich