摘要:
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.
摘要:
An apparatus for generating ozone with at least one ceramic tube forming a dielectric, a discharge electrode associated with the ceramic tube and connected to a high voltage supply and a counter-electrode is proposed, in which the at least one ceramic tube is cooled by a coolant and an oxygen-containing gas is passed into the vicinity of the discharge tube. The at least one ceramic tube (1) is inserted in a ceramic moulding (2) by means of oxidic glass or ceramic solders and an encasing tube (6) embraces the at least one ceramic tube (1) and is sealed against the ceramic mouldings (2).
摘要:
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.
摘要:
An exchangeable filter element is disclosed. The filter element is especially adapted for nuclear installations for the purification of gas streams which contain toxic or radioactive matter. A method is also disclosed for the exchange and disposal of contaminated filter elements, which filter elements are reducible in volume for packing into waste containers.
摘要:
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.
摘要:
An apparatus for measuring ions in a gas which has a sensor around which the gas flows, the ions giving off their charge and giving rise to a current. The sensor is constructed as an electrode with a flow-favorable shape, such as a sphere. A fixed voltage is impressed on the electrode and the current produced at the electrode is measured, evaluated in a circuit and constitutes a measure for the ion count.
摘要:
A device for generating ions in gas streams is proposed, which has an electrode arrangement exposed to the gas streams and a pulsed high voltage supply, which supplies an alternating sequence of negative and positive pulses with step edges. The electrode arrangement comprises at least one point discharge electrode and at least one counterelectrode associated with one another in fixed, clearly defined manner. The time behaviour of the high voltage signal is fixed in such a way that the duration of the particular pulse corresponds to the transit time of the ions between the electrodes and the spacing of the pulses is adapted to the speed of the gas streams.