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WO/2002/083578A2 |
A method to remove scale build-up in a vessel having at least one screen is described and involves placing a cover inside the vessel such that it is located beneath at least one screen to separate the screen from the rest of the vessel. ...
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WO/2002/083263A1 |
A pulp screen cylinder (64) that includes screen media (66) releasably engaged with a frame (68) at spaced locations opposing movement of the media away form the frame during screening. A preferred frame includes a plurality of spaced en...
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WO/2002/079568A1 |
The invention relates to a method for preparing fibrous material for producing paper or cardboard. Said method comprises the following steps: a) fibres are prepared in the form of a suspension having a pre-determinable concentration of s...
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WO/2002/075047A1 |
A device for pumping a pulp suspension and simultaneous abduction of gas from the suspension. The device comprises at least one pulp pump (1) with a housing (2) with inlet (3) and, respectively, outlet (4) for the suspension and an outle...
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WO/2002/072947A1 |
The invention relates to a method of controlling quality of pulp. Pulp formed in mechanical defibering of wood is screened into at least two fractions, the accept that has passed the screening phase being forwarded for further use and th...
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WO/2002/072310A2 |
This invention relates to a method of diagnosing or controlling a grinding mill for paper pulp, wood chips, or other fibrous materials, by measuring the incremental change in power related to an incremental change in the gap, and using t...
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WO/2002/064884A1 |
A rotary filter (1) for fibrous suspensions (S) is disclosed comprising a rotor (2) coaxially arranged inside a filtering basket (4), an annular hollow space (8) being defined between them. In th eannular hollow space (8) there are one o...
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WO/2002/064259A1 |
A pair of opposed co-operating refining elements (1, 2) intended for a disc refiner for the disintegration and refining of lignocellulosic material in a refining gap between two opposed counter-rotating refining discs. The refining eleme...
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WO/2002/057542A1 |
The invention relates to an apparatus for passing stock to a headbox (100) of a paper machine or equivalent. The apparatus comprises a deaeration tank (11) which is provided with vacuum by means of a vacuum pump (P¿0?) or another device...
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WO/2002/053831A1 |
The invention relates to a method for removing air from the tail water reservoir of a paper machine and a corresponding tail water reservoir. The tail water reservoir comprises a cylindrical vessel (22), an intake channel (24) and an air...
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WO/2002/047822A2 |
A refiner plate for a rotary disk refiner that is adjustable. The refiner plate has a portion (34) of its refining surface (36) that is adjustable relative to some other part. In one preferred embodiment, the refiner plate has a part (34...
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WO/2002/040766A2 |
A method of recycling bonded fibrous materials, the method includes the steps of: providing pieces of bonded fibrous materials, the pieces having sizes that are adapted for suspension in a liquid; suspending the discrete pieces of bonded...
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WO/2002/034357A1 |
The invention relates to a slotted screen device (1;1',1') which is essentially made up of form-fit connections and which can be used e.g., for treating fibre suspensions in the paper industry. The inventive slotted screen device (1;1',1...
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WO/2002/033165A1 |
The invention relates to a method, an apparatus and a screen for screening mechanical fibre pulp. According to the invention a short fibre material is separated using a gap screen, whereby said material can be very efficiently separated ...
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WO/2002/033166A1 |
The invention relates to a method and a screen for screening two or more pulp mixtures with different roughness. The screen comprises a first screen cylinder (2) and a second screen cylinder (6). A coarse first pulp mixture is fed into t...
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WO/2002/029342A1 |
When separating steam and gas from a stream containing, possibly glue-coated, fibre pulp produced by a refiner, the hot fibre pulp is directly fed from the refiner to a separation cyclone (4) placed in a drying channel (2) for drying the...
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WO/2002/026348A1 |
The invention relates to a device for separating particulate solid materials from an aqueous turbid medium sifting, comprising a housing (1) with an inlet pipe (12) for the sludge and an outlet (13) for the sifted sludge, in addition to ...
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WO/2002/022947A1 |
The invention concerns a method and equipment for pulp fractionation in a paper or board machine. In the method, virgin stock is conducted to the paper or board machine and further to a centrifugal cleaner installation (12) into its firs...
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WO/2002/022946A1 |
The invention relates to a deaeration system for feeding stock into a headbox (10) of a paper machine or equivalent. The deaeration system comprises a deaeration tank (11), to which a duct (a¿1?, a¿2?) leads from a wire pit (12) either...
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WO/2002/016692A1 |
The invention relates to a method for monitoring thermo-mechanical defibration processes, according to which the concentrations of the groups of substances contained in the production water, having different ratios of polar and non-polar...
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WO/2002/009844A1 |
An improved pressure screen (10) includes a screen cylinder (12) and a rotor (14). The screen cylinder (12) defines an axis (30); an inlet side (32); and a flow velocity retarding zone (18), most preferably including an annular chamber (...
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WO/2002/006815A1 |
In the present invention a refiner (108) of a mechanical pulping line is supplied with a controllable acoustic source (14), arranged for emitting acoustic signals into the pulp fluid. The controllable acoustic signal is allowed to intera...
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WO/2002/002238A1 |
The invention relates to a refiner and to a method for treating the surface of a tool of said refiner using a process which involves plasma. According to said method, external ions and an additional hard material layer are attached to th...
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WO/2002/000771A1 |
The invention relates to a method for the production of cellulose particles by means of dispersing a cellulose solution in a precipitant, in addition to a device for carrying out said method. The method is characterised in that the cellu...
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WO/2002/000999A1 |
The present invention relates to a method for loading paper or paper board during the papermaking process. At least one process stream (40) containing fines and/or fillers are combined with long fibers (41). The combined fines and/or fil...
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WO/2001/094021A1 |
The present invention relates to a refining segment (8; 18) for a refining disc (4) included in refining apparatus for disintegrating and refining material containing lignocellulose in a refining gap (6) between two opposing refining dis...
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WO/2001/094020A1 |
The present invention relates to a refining segment (7; 17; 27; 37) for a rotatable refining disc included in refining apparatus for disintegrating and refining material containing lignocellulose in a refining gap between two opposing re...
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WO/2001/089702A2 |
The invention relates to a method and a system for utilising waste that contains fibres and combustible material. Waste is slushed in a continuous-operation high-consistency pulper (10) to suspend in water the fibres contained in the was...
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WO/2001/080969A1 |
A screening assembly (30) and method where each support ring (52, 54) is bonded to a perforate screen section (36) by bonding material (116) that preferably is brazing material. There is a joint (112, 114) between each ring and section i...
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WO/2001/081674A1 |
The invention relates to a process for directing a papermaking pulp towards a regulated outlet (9). Accept from successively arranged cleaning stages (6, 14, 20) is lead towards the outlet (9), while the respective rejects are lead to th...
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WO/2001/081675A1 |
The invention relates to a process in connection with the forming of a material web especially at a head box (3) of a former (1). Liquid from the material web is recirculated to an inlet (20) of a degassing pump (8) having an internal de...
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WO/2001/076756A2 |
A system (30) and method for determining stock consistency and for using consistency as a process variable to control some aspect of operation of a refiner (32) used to refine stock. The system includes at least one sensor (70 or 180) fr...
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WO/2001/071276A1 |
In a machine which is provided with a stator (5) and an opposite rotor (3), a sensor (10) of magnetic type, arranged in the stator, for determining the distance between the stator and the rotor can be calibrated by the sensor first being...
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WO/2001/068974A1 |
This invention relates to a refiner force sensor for refiners used in the pulp and paper industry, to a refining apparatus, and to a method of measuring force acting on a refiner bar in a refiner.
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WO/2001/068260A1 |
Refining elements for refining discs for disc refiners for the manufacture of mechanical pulp, for example, board pulp, are subjected to hard abrasive wear in acid environment and at high temperature. In order to improve the wear resista...
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WO/2001/066855A1 |
A sensor (78), sensor refiner disk (58), correction system (162) and method used to measure a parameter in a refining zone of a refiner (30). Signals from one or more sensors of the sensor disk are processed by a processing device (164) ...
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WO/2001/066854A2 |
A system and method for monitoring and controlling operation of a disk refiner (32). The method regulates operation in response to a process variable (242) preferably in relation to a setpoint (256). The variable can be temperature, pres...
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WO/2001/066255A1 |
A paper pulp refiner with control system employs active hydrostatic bearings for supporting the refiner rotor, at least in part, the hydrostatic bearings are defined between the refiner rotor plates (25, 55) and stator plates (22, 60) th...
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WO/2001/061104A1 |
The invention relates to a rotationally symmetrical sieve for fibre suspensions. The inventive sieve comprises a series of straight profile rods (12) which extend in the direction of the sieve axis and form slit-shaped sieve openings (56...
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WO/2001/059206A1 |
The invention relates to a method for controlling the quality of pulp. Pulp produced by mechanical defibering of wood is screened to provide at least two fractions, of which the accept that has passed the screening phase is carried forwa...
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WO/2001/059207A1 |
The present invention relates to a screening device for fiber suspensions, comprising a housing (1) with a screening means (5) and a rotary rotor (6) provided with pulsation wings (9) located at the screening means (5), whereby a screeni...
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WO/2001/055501A1 |
The invention relates to a method for determining a characteristic value for the binding force potential of the paper fibers present in a fiber suspension that is prepared for producing paper. According to the invention, the air content ...
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WO/2001/051168A1 |
The wedge wire screen of the present invention accomplishes economical manufacture of a durable cylindrically shaped screen, for use in closed pressure screens for the precessing of wood fibers or secondary fibers into paper pulp stock, ...
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WO/2001/048308A1 |
A method of draining water from low-consistency water-fibre suspensions. In the method, the water-fibre suspension is fed to a filtering surface comprising holes. In the method, the rougher fibres are first separated from the water-fibre...
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WO/2001/046516A1 |
The object of the present invention is a method for making mechanical pulp, such as thermomechanical or chemi-thermomechanical stock. The mechanical pulp is used as a raw material for printing paper, and its freeness value is 30-70 ml CS...
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WO/2001/042557A1 |
The object of the present invention is a method for making mechanical pulp, such as thermomechanical or chemi-thermomechanical stock. The mechanical pulp is utilised as a raw material for printing paper, and its freeness value is 30-70 m...
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WO/2001/042556A1 |
The invention relates to a method for separating cellulose fibre pulp when the cellulose fibre pulp to be separated forms a mixture with a medium which is substantially in gaseous form, for example with steam or air. The cellulose fibre ...
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WO/2001/040570A1 |
The present invention relates to an arrangement and a rotor for screening of pulp. The arrangement and rotor according to the invention are especially suitable for the screening of chemical and mechanical pulps, i.e. fiber suspensions of...
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WO/2001/037998A2 |
A refiner for refining lignocellulosic material having opposed, relatively rotating, rotor and stator refiner plates. The refiner plates each have radially inner and outer edges and an inlet zone extending radially outward from the inner...
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WO/2001/036741A1 |
The invention relates to a method for producing fittings for processing paper fibrous material in which the actual processing element (2) and the base body (1) are separately manufactured, assembled and then interconnected in a fixed man...
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