Abstract: The invention relates to a method and device for the washing of a medium consistency fibrous slurry, especially a chemical pulp slurry in which the slurry is fed at an inclined angle onto a substantially horizontal portion of circulating filter belt, and then distributed over substantially the entire working width of the filter belt. The distributed slurry is then washed with a washing liquid under localized pressure to produce a slurry having a medium consistency range, i.e., about 8 to 15 percent. In order to increase the consistency to 20 to 40 weight percent, preferably about 30 to about 35 weight percent, the washed slurry is passed to a pressing zone.

Abstract: A conveyor belt has edges with longitudinally extending profiles formed as grooves or elevations for sealing and guiding. An apparatus for producing belts with profiled edges uses a cutting device and profiled molds to form profiles in the belt and its edge while the belt is guided and supported by rolls. The apparatus further includes a cutter which forms a groove in the conveyor belt and which allows lateral guiding of the bolt in relation to the mold.

Abstract: A grinding element for a drum refiner for the crushing or grinding of fibrous material. The drum refiner includes an engine driven rotor having a generally horizontal rotor axis and at least one material feed. A rotor jacket is positioned on the rotor and has a surface of revolution. The grinding element is attachable to the rotor jacket on the surface of revolution and has a diameter increasing away from the material feed. A housing receives the rotor and rotor jacket therein, and has an opposing inner wall with a corresponding grinding element thereon. The grinding element on the rotor jacket includes a channel spaced from the material feed for the discharge of steam. The channel has one end in fluid communication with the grinding gap and a second end in fluid communication with a bore extending generally normally to the channel. The bore is in fluid communication with a cavity in the housing. The improvement comprises the grinding element on the rotor jacket being generally formed of a segment.

Abstract: Process for producing catalysts for use within hydrogenation, oxidation, dehydration or dehydrogenation processes comprising oxides, in pure or mixed form, or being applied as mixed crystal systems, made of nickel, cobalt and molybdenum, vanadium, tungsten, titanium and chromium, starting with their corresponding aqueous solutions of their respective chlorides, fluorides or nitrates, which afterwards are processed within a pyrohydrolysis plant to gain the oxide powders, of typical specific surfaces areas of 1 to 100 m.sup.2 /g, agglomerate sizes of 1 to 500 microns and mean particle sizes of 20 to 30 microns. The corresponding anions of these salt solutions are transformed during pyrohydrolysis into their respective acids, which can be regained by absorptive means and which thereafter can be returned to a chemical dissolving process to make the salts and solutions for the pyrohydrolysis, which means an economic advantage.

Abstract: The invention relates to an apparatus for the crushing or grindign of fibrous material, in particular fibrous material wet or mixed with water, preferably chips, in particular to drum refiners.The invention is mainly characterized in that channels for the discharge of steam are provided spaced from at least one material feed extending radially to the rotor axis or tangentially to the rotor jacket or housing shell on the grinding surfaces and optionally on the jacket supporting them, the channels piercing the grinding surfaces and optionally their supports and being provided in the working area of the grinding element provided on the surfaces, conveniently surfaces of revolution, in particular frustoconical surfaces, inclined to a rotor axis or extending normally thereto, and emptying into channels optionally provided in the bottoms of the supports and extending normally to the channels and conveniently being connected to cavities in the housing.

Abstract: This invention relates to a device for regulating a water-removing or drainage machine, particularly a double-sieve sludge drainage machine having a plurality of automatic control means for adaptation thereof to sludges with different drainage properties, comprising an automatic throughput control means in which a sludge level in a filtering zone serves as an indication for the automatic throughput control means, an automatic flocculant control means adapted to employ shearing strength of a sludge-flocculant mixture as an indication of drainage behavior, and an automatic sieve velocity control means responsive in dependence upon drainage velocity.

Abstract: This invention relates to an apparatus for restratifying the filter cake in the strainer zone of strainer belt presses, in particular double strainer sludge dehydrating equipment, comprising one or more monofilament or multifilament cables (9) tensioned transversely or obliquely to the direction of advance of the strainer across the width of the strainer belt (6) and the filter cake (7).

Abstract: This invention relates to an improvement in a press or reversing roller for double sieve band dehydrating machines for dehydrating suspensions, particularly a press roller in which the sieves with an interposed sheet of material partially loop over the roller, the roller being provided in a multiple-piece manner over the sieve path, and wherein one step bearing is provided at the contact point of two adjacent rollers, the improvement comprising stationary covering means secured between end faces of adjacent rollers, said covering means having the same radius as said adjacent rollers at least in the looping area and serving as a glide shoe.

Abstract: This invention relates to an improvement in a shock-proof bearing for a heavy drum which is rotatably supported on roller and is adapted to be driven by a gear drive, the axial spacing between the drum and the roller or the gear drive remaining constant for every spring-support position, the improvement comprising that the roller and a driving pinion are integral, and spring support elements mounted between a casing of the roller and a hub thereof.

Abstract: This invention relates to an improvement in dehydrating equipment, in particular double belt presses, in which an upper endless sieve belt is guided by means of parallelly supported rollers, with parallelly supported rollers being similarly arranged below and on which a lower endless sieve belt is guided, the suspension to be dehydrated being introduced between the sieve belts, the sets of rollers being divided into a wedge section, a registering section, a precompression section and a main compression section, the improvement comprising that the compression rollers in the pre-compression section are composed of several pieces extending across the equipment and, when viewed in the direction of motion of the sieve belts, are alternatingly offset backwardly or forwardly, the ends of the rollers penetrating the region of adjacent rollers in overlapping fashion.

Abstract: This invention relates to an improvement in a press for dehydrating material in which the material is passed between two endless sieve belts adapted to move in the same direction and to pass over and around pairs of rollers and/or offset upper and lower rollers, the rollers in various sets forming a pre-dehydration zone and a wedging or compression zone,The improvement comprising a compression zone in the form of a frame-like structure, said structure containing individual compression roller means mounted on bearing blocks of varying heights,And means for displacing and/or exchanging said bearing blocks, whereby a path for said material has an ascending slope with line compression, or is wavelike or S-shaped with surface compression.

Abstract: This invention relates to an improvement in a discharge and draw-off device for driers of material webs including nozzle casings mounted transversely over the path of a web to be dried, and having discharge apertures in said casings for discharging a drying medium and interstices between said casings for drawing-off said medium, the improvement comprising a substantially V-shaped formation of rows of the discharge apertures, whereby a double whirl is produced whose flow spiral increases in the direction toward the draw-off openings.

Abstract: This invention relates to an improvement in a mounting for the sealing housing in a main coolant pump having a vertical pump shaft, an impeller at the lower end of the pump housing, and the pump housing being closed at the upper end thereof by a pump cover in the region of which the sealing housing is located,The improvement comprising that said sealing housing is positioned upwardly from said pump cover,An outer pipe means connecting said pump housing and said sealing housing and passing without touching through an aperture in said pump cover,Said outer pipe means having a portion of swan-neck configuration, in cross-section, in an extension of said pipe means into a region of a housing flange,And said swan-neck portion terminating in a flange between said pump housing and said pump cover.