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WO/1998/053135A1 |
A blade arrangement for a pulp screening apparatus. In the arrangement, the cross section of a blade (11) rotating close to the surface of a screen cylinder (7) changes in such a way that as the pulp consistency changes in the vertical d...
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WO/1998/050624A1 |
The invention relates to a method for controlling a multi-step screening apparatus (1), the method comprising controlling other accept, reject and dilution flows in relation to the flow measured in the accept channel (7a) of the first sc...
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WO/1998/050623A1 |
An apparatus for feeding and refining lignocellulosic fibre material in a pulp manufacturing process includes a chip preheater (10) which is connected to the inlet of a screw feeder (11), and a refiner (16) which is connected to the outl...
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WO/1998/049392A1 |
The invention relates to a barrier for draining at the dewatering of fibrous suspensions. The barrier has the object to retain the fibers and to permit the filtrate to be discharged through openings in the barrier. The driving force for ...
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WO/1998/048936A1 |
The present invention relates to a measuring of the beating process in a refiner comprising sensors (11, 12) for sensing pressure and temperatures arranged in one or more radial bars (4) which are mounted in or between the beating segmen...
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WO/1998/048103A1 |
A screen plate (1) for screening of pulp suspensions, comprises a number of elongated at least partly curved screen slots (3). According to the invention every screen slot has a width which is maximally 0,8 mm, and the screen slots bend ...
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WO/1998/047622A1 |
The centrifugal cleaner (20) of this invention is of the type having an inverted cylindrical cone (36), with a tangential inlet (34) at the top and an outlet at the bottom (26). The improvement consists of placing a ring (22) or flow smo...
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WO/1998/046822A1 |
A screening apparatus (1) for separating fibre suspensions comprises a stationary tubular screen (9) for receiving a fibre suspension to be separated at one end of the screen, a rotor (5) coaxial with the tubular screen, and flow restric...
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WO/1998/046821A1 |
A screening apparatus (1) for separating fibre suspensions comprises a stationary tubular screen (4) for receiving a fibre suspension to be separated at one end of the screen, a rotor (7) coaxial with the tubular screen, and dilution liq...
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WO/1998/045532A1 |
A device for separating heavy impurities from pulp suspensions, and a separation means (2) for use in said device. The device comprises a casing (1) with inlet (7) for the pulp suspension at one end and outlet (8) at the other end and a ...
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WO/1998/036837A1 |
A feeding device intended for refiners with two opposed refining means (11, 12), of which one is stationary and one rotary. The refining means are provided with refining elements (14, 15), which between themselves form a refining gap (17...
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WO/1998/037271A1 |
A feeding element intended for refiners with two opposed refining means (11, 12), one of which is stationary and one rotary, which are provided with refining elements (14, 15), which between themselves form a refining gap (17) with a ref...
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WO/1998/036836A1 |
A method for mechanical working of lignocellulosic fibrous material in a refiner with refining means (11, 12) rotating relative to each other, and a device (22) for feeding the fibrous material into the refiner. The material is accelerat...
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WO/1998/033594A1 |
A refining element for disintegrating and refining fiber material in a disc refiner. The refining element is formed with a base surface (1, 11), on which a pattern of bars (2, 12) is arranged. The bars (2, 12) extend over the surface of ...
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WO/1998/029599A1 |
A cylindrical screen (16) comprises an inlet end (11) for receiving a paper pulp suspension to be separated from undesired particles, and a reject end (13) for removing separated particles. The screen (16) is intended for the kind of pre...
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WO/1998/029596A1 |
The present invention relates to a method for defibrating fibre-containing material in a device operating with the pin mill principle. The device comprises a housing and in it a first rotor (11) equipped with collision surfaces; a second...
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WO/1998/028490A1 |
In order to produce paper from fibrous material, a prepared substance is conveyed to a paper machine (15) with a head box. The substance can contain, for example, a mixture of different recycling paper types with cellulose. In accordance...
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WO/1998/028486A1 |
The invention aims at optimizing the functioning of the installations used in the production of mechanical wood pulp and/or refiner mechanical pulp. In accordance with the invention, continuous spectra of electromagnetic radiation and/or...
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WO/1998/027278A1 |
Disclosed is a process for fractionating cellulosic fibers that is effective to result in cellulosic fibers that exhibit desired properties such as fiber length and fiber coarseness values. The fractionating process is quite efficient an...
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WO/1998/026874A1 |
A system and method for treating a waxed fiber paper product with a high wax content to remove a substantial portion of the wax content includes the pulping of the wax paper fiber at an elevated temperature in excess of the melting tempe...
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WO/1998/020958A1 |
A pressure screen (10) for screening a suspension of papermaking stock employs a cylindrical screen means (20) which comprises a single screen or a plurality of axially aligned screens and in which the stock screening regions are arrange...
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WO/1998/018559A1 |
The present invention relates to a method and an apparatus for dividing a pulp suspension into an accepted fraction and a rejected fraction containing impurity particles. According to the invention, a mixture of material containing compo...
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WO/1998/014658A1 |
The present invention refers to a screening device, such as a screen cylinder, for screening, filtration, fractioning or sorting e.g. pulp suspensions in pulp and paper making industry. The screening device comprises a plurality of filte...
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WO/1998/011297A1 |
Relatively heavy contaminants are separated from a contaminated pulp suspension by pumping the latter through a multihydrocyclone unit (6) having a multiplicity of hydrocyclones. Each hydrocyclone is provided with turbulence creating mea...
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WO/1998/011296A1 |
With the aid of hydrocyclones, relatively light and heavy contaminants are separated from a pulp suspension. According to the invention, at first light contaminants are separated from the pulp suspension and the fibre concentration of th...
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WO/1998/009018A1 |
An improved high-consistency disc refiner employs a central ring or flinger nut (24). The radial vanes (44) mounted on the flinger nut are releasably mounted to the flinger nut base in which keyways (58) are milled. Matching keys (52) on...
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WO/1998/006893A1 |
A screen panel intended for screening fiber material and a method of its manufacture. The screen panel (1) is intended to be a portion of the jacket surface of a screen cylinder. Each screen panel is formed in one piece and provided with...
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WO/1998/004356A1 |
A hydrocyclone (10) for separating lightweight contaminants from a suspension of papermaker's stock as a through-flow design in which an inlet section (12) has a frusto-conical flow controlling wall (50) and has a central flow stabilizer...
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WO/1998/001616A2 |
The apparatus (10) is a washer, thickener and classifier for recovering solids from liquids including a truncated conical screen (12) with walls typically sixty degrees from the horizontal and formed of filter media. Stock sprayer assemb...
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WO/1997/049862A1 |
An asymmetric hydrocyclone (110) is modified and controlled so as to effectively remove contaminants of substantially neutral buoyancy from a paper cellulosic pulp. More specifically, a method includes prepositioning a substantially frus...
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WO/1997/049857A1 |
The invention relates to a method for the control of a groundwood pulping process. According to the invention the drainability (freeness, CF) of the pulp and another quantity Q characterising the pulp quality are measured, whereby the qu...
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WO/1997/048493A1 |
The present invention provides an apparatus and method for decontaminating aqueous paper pulp, the apparatus comprising a decontaminating cell (12). The decontaminating cell (12) has an upper light contaminate collection hood (30) and/or...
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WO/1997/041296A1 |
A separation device for separating contaminants from fibre pulp suspensions, preferably produced from waste paper, comprises a cylindrical screen member (4) and a rotor (7) arranged therein. An annular inlet passage (14) for incoming sus...
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WO/1997/038792A1 |
The invention relates to a method for controlling the beating in a refiner. This is characterized in that, in order to influence the different quality parameters for the beaten mass, the applied pressure on the beating discs in the refin...
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WO/1997/039181A1 |
The present invention relates to a method and apparatus for filling a pulp tank, according to which invention pulp is pumped into a pulp tower (10) in such a way that it can be supplied into the tower (10) at different levels from at lea...
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WO/1997/036044A1 |
A method and a device for degassing a gas-containing fluid medium in connection with the pumping of the medium by a centrifugal pump (6, 21, 29) which is designed for gas separation, where the gas is evacuated by the suction effect from ...
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WO/1997/034045A1 |
A plurality of like wedge bars (36) are formed with a groove (46) between two lands (48). The wedge bars (36) are assembled into a cylindrical screen (24), with the grooves (46) defining screening slots (30) of a uniform width. The wedge...
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WO/1997/033036A1 |
An improved process is disclosed for deinking waste paper which contains laser, electrostatic, and other non-impact printing toners/inks to produce high quality (high brightness, little to no dirt content) pulp with little or no fiber lo...
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WO/1997/032079A1 |
There is disclosed herein methods and apparatuses for the improved recovery of fine fibers from a feed suspension consisting of long fibers, medium fibers, fine short fibers, contaminants and liquid carrier. In the preferred embodiment, ...
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WO/1997/032078A1 |
A process and apparatus for controlling separators used to separate suspensions of fibers is disclosed. In a system in which at least one separator is used to separate a fiber suspension into fractions containing components of the feed s...
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WO/1997/030211A2 |
The present invention relates to a screening apparatus comprising an outer housing with connections for material to be treated and material treated, end pieces, a stationary screen drum (5) disposed inside the housing (1) and secured wit...
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WO/1997/023291A1 |
Refining element intended for a refiner with flat or conical opposed refining surfaces, which are rotary relative to each other for working and refining lignocellulosic material during its passage through a refiner gap (15, 35) between t...
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WO/1997/023688A1 |
An apparatus is disclosed for processing fibre suspensions, in particular extracted from used paper, which contain particles which are also suspended and which need to be separated from the useful fibres in the suspension and whose volum...
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WO/1997/020920A1 |
A novel purified xylanase produced by Acidothermus sp. is disclosed having a pH optimum of between about 3.6-4.2 and a molecular weight of between about 50-55 kD as determined by gel filtration. The disclosed xylanase is useful in the bl...
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WO/1997/020104A1 |
The present invention relates to a method of manufacturing a wire screen product and a wire screen product which is especially suitable for screening fiber suspensions of the wood processing industry. It is a characteristic feature of th...
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WO/1997/020103A1 |
The present invention relates to a screen cylinder for screening fiber suspensions of the wood processing industry. The screen cylinder comprises a rotationally symmetric screen surface located on the side of the pulp to be screened, and...
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WO/1997/018037A1 |
A pair of co-operating refining elements (10, 11) intended for a disc refiner for finely disintegrating and refining lump-shaped lignocellulosic material in a refiner gap (5, 6) between two opposed refining discs (1, 2). The outer portio...
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WO/1997/015717A1 |
The present invention relates to a deaeration vessel used in the paper and pulp industry. Especially it relates to an improved double-acting deaeration vessel. As implied by their name, these vessels are purposed for removing gas from a ...
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WO/1997/015716A1 |
A refiner apparatus and method for producing refined pulp by exerting mechanical forces on pulp fibres. The apparatus includes a member having a pulp side and a drainage side, the pulp side having a plurality of spaced apart raised bar p...
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WO/1997/013918A1 |
An arrangement for screening pulp suspensions, comprising a casing (1) with inlet (6) for inject and outlets (10, 11) for accept and reject. Between a rotor (3) in the casing a screening zone (4) is formed. The inject inlet (6), reject o...
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