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7622018 |
Arrangement for and a method of treating pulp, and a method of modernizing a pulp tower
An arrangement for and a method of treating pulp, and a method of modernizing a pulp tower are disclosed. The arrangement and method relate to treating pulp in connection with high-consistency pulp...
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7569120 |
Method for converting an up-flow tower for cellulose pulp to a down-flow tower
The method is for converting a vertically standing up-flow tower by inserting a freely insertable pipe into the conical part of the up-flow tower the tower is converted to a down-flow tower where...
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7566380 |
Continuous digester with fluid circulation
The arrangement concerns an improved design for at least one of the cooling, dilution and washing at the bottom of a continuous digester for the production of cellulose pulp. By arranging at least...
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7396434 |
Catalytic reactor process for the production of commercial grade pulp, native lignin and unicellular protein
A continuous and batch system to produce cellulose, native lignin and unicellular protein from any form of vegetation in a closed process. The biomass is mixed in the impregnate solution of nitric...
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7390378 |
Method of curling fiber and absorbent sheet containing same
A method of providing papermaking fibers with durable curl comprising: a) introducing papermaking fiber into a rotatable drum adapted for operation at elevated pressure; b) rotating the drum...
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7364638 |
Process for the hot dispersing of a paper fiber stock
The present invention is directed to a process for the hot dispersing of a paper fiber stock that includes providing an aqueous paper fiber stock and pressing the aqueous fiber stock in a...
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7364639 |
Method of producing twisted, curly fibers
A method of forming twisted, curly fibers from a wet wood pulp without the aid of a wet fluffing process or a chemical cross-linker. The method includes forming the wet wood pulp into fiber bundles...
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7291244 |
Pulp flaker
Methods for conveying, mixing, leveling, and flaking dewatered pulp to produce pulp flakes suitable to be used in a dryer. Methods for producing a consistent flow rate of pulp, and, for producing...
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7282114 |
Method for processing pulp
The object of the invention is a method and a device for dispersing pulp, especially pulp containing waste paper, in which method ground pulp mass is fed between the blade surfaces (4) of a...
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7279073 |
Apparatus for liquid-based fiber separation
An apparatus for treating fibrous material is disclosed. The apparatus may include a fiber separator, a de-liquefier, a dry-to-wet blender and a flash dryer. The fiber separator may be a...
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7156952 |
Method and arrangement for oxygen delignification of cellulose pulp
The invention relates to a method and arrangement for alkaline oxygen delignification of cellulose pulp. By adding alkali in the final phase of the oxygen delignification one can ensure that an...
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7097740 |
Method and screen for screening at least two pulp mixtures
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 and a second screen cylinder. A coarse...
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7005034 |
Method in connection with the production of mechanical pulp
A method in connection with the production of mechanical pulp from a cellulose containing material wherein the material is processed in at least one refining step to produce pulp. According to the...
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7001483 |
Apparatus for making carboxylated pulp fibers
An apparatus for carboxylating wood pulp which utilizes the wood pulp bleach plant and the method of carboxylating the pulp which takes place in the bleach plant.
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6986829 |
Process and container for stacking high-consistency stock
Process and container for stacking and diluting paper fiber stock. The process includes stacking a high-consistency stock in a first volume for defined dwell time, conveying stock to second volume...
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6986832 |
Arrangement for mixing flows in papermaking process
The invention relates to a method and a mixer for mixing flows of a papermaking process. In the invention, a first flow is conveyed through a tube, and turbulence is generated in it by means of...
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6946072 |
Method and apparatus for washing a fibre suspension
A method for washing a fibre suspension with washing liquid, in which, in accordance with the invention, the fibre suspension is introduced into an annular treatment channel ( 24 ) that has an...
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6911118 |
Pulper for producing paper pulp from waste paper
A pulper for producing paper pulp from waste paper containing undesired scrap particles includes a container ( 1 ) forming a chamber ( 4 ) defined by a bottom wall ( 5 ) and a cylindrical...
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6881297 |
Process for aerating dispersions
A device and process for aerating dispersions, particularly for flotation of pulp suspensions, in a de-inking process where the pulp suspension containing dirt particles is sprayed into a tank...
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6850592 |
Methods for identification and verification using digital equivalent data system
Apparatus and methods in which one or more elemental taggants that are extrinsically placed in an object are detected by x-ray fluorescence analysis to identify or authenticate the object are...
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6841036 |
Process for the oxygen delignification of pulp in two stages with higher pressure in the second stage
A system and process for the oxygen delignification of pulp consisting of a lignocellulose-containing material that has a mean concentration of 8-18% pulp consistency. The oxygen delignification...
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6793771 |
Ozone bleaching of low consistency pulp
Provided is a process for bleaching pulp with ozone. The process involves preparing a slurry of cellulosic pulp having a consistency in fibers of from 1-5 weight %. Such a low consistency slurry is...
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6773547 |
Process for the bleaching of low consistency pulp using high partial pressure ozone
Provided is a process for bleaching pulp with ozone. The process involves preparing a slurry of cellulosic pulp having a consistency in fibers of from 1 up to 5 weight %. Such a low consistency...
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6740198 |
Method and arrangement for mixing pulp components in the manufacture of paper
The invention relates to a method of mixing pulp components in the manufacture of paper, in which method the pulp components to be mixed are led to a mixing point along tubes arranged inside each...
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6673201 |
Top separator with intraseal for digester vessel in a pulp or fiber processing system
A top separator assembly for a digester is disclosed comprising: a rotatable shaft for the top separator; a packing for the shaft; and a sealing ring operatively mounted to the shaft and having a...
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6623156 |
Method for mixing a fluid mass
Method and apparatus for treating a fluid mass or stock, particularly couch stock or the like in paper making. Stock material is fed to a vessel having a mixing arrangement comprising rotatably...
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6579411 |
Bleaching medium consistency pulp with ozone
A method of bleaching cellulose pulp with ozone includes pumping cellulose pulp in form of a fiber suspension having a consistency range of 5 to 25% with a high-consistency pump to a fluidizing...
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6579412 |
Process for ozone bleaching of low consistency pulp
Provided is a process for bleaching pulp with ozone. The process involves preparing a slurry of cellulosic pulp having a consistency in fibers of from 1-5 weight %. Such a low consistency slurry is...
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6547923 |
Process for bleaching medium consistency pulp with ozone using a pressurized fluidizing mixer
A method of bleaching cellulose pulp with ozone includes pumping cellulose pulp in form of a fiber suspension having a consistency range of 5 to 25% with a high-consistency pump to a fluidizing...
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6491787 |
Method for heating pulps
A method and apparatus for heating cellulose pulp with steam are provided. Low-pressure (e.g. 3-5 bar (abs.)) steam is supplied into the pulp flowing as a plug flow in such a way that in the flow...
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6471825 |
Method for deflocculating and chemically loading fibers in a fiber suspension with calcium carbonate
An apparatus for continuously loading fibers in a fiber suspension with a chemical compound includes a deflocculating vessel having an interior chamber, a fluid inlet connected with the interior...
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6451163 |
Method of handling comminuted cellulosic fibrous slurry in a cylindrical vessel
In a cellulose pulp handling vessel having a first diameter material storing or treating portion above a second diameter discharge which is at least 20% less than the first diameter, reduced...
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6447645 |
Feeding cellulose material to a treatment vessel
A feed system for a cellulose pulp treating vessel (such as a continuous digester) is not limited by the required L/W ratio of the pump feeding a wood chip slurry to a high pressure transfer...
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6440272 |
Device for mixing stock suspensions
Process and device for the mixing of suspensions with possibly different natures and/or compositions in the stable section of a paper machine. In the process, a suspension, particularly of the...
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6419786 |
Method for bleaching wood pulp containing recycled paper
A method of treating wood-fiber pump, particularly wood-fiber pulp that contains recycled paper, comprises delivering the pulp to and advancing the pulp in a heating zone while delivering steam to...
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6379495 |
Process for the production of cellulose paper pulps by biodelignification of vegetative masses
Process for the production of cellulose paper pulps from vegetable masses, comprising the steps of mixing and conditioning a vegetative mass suitable to form a culture medium with an inoculum...
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6372086 |
Pulper and countercurrent washer sugar cane extraction
Processes are disclosed for extracting sugar rich liquor from sugar cane. The sugar cane is first treated by pulping it in two tub type pulpers having a rotating impeller. The contents of the first...
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6358363 |
Method and apparatus for bleaching pulp using two fluidizing mixers
A method and apparatus for bleaching medium consistency pulp with ozone using at least 2 fluidizing mixers to mix ozone and carrier gas into the pulp. The method is particularly applicable when the...
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6354514 |
Method and apparatus for treating material having poor thermal conductivity
A method and an apparatus for heating or cooling material having poor thermal conductivity, especially medium-consistency fiber suspensions. The material is directed, substantially as a plug flow,...
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6350348 |
Batch cooking with black liquor pretreatment
A method of cooking pulp in an alkaline batch process (using one or more batch digesters) improves pulp bleachability. The wood material is supplied to the digester; the cellulosic material is...
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6280569 |
Compression rings for column relief in continuous cooking vessels
The flow of a liquid slurry of comminuted cellulosic fibrous material (e.g. wood chips) in a vertical vessel is made more uniform by providing a plurality of vertically spaced sets of either...
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6241852 |
Method and device for mixing of a fluid into a pulp-suspension at the lowest pressure of the suspension
Process and device for mixing fluid into a pulp suspension of cellulose-containing fiber material, in which the pulp suspension is pumped in through a pump inlet (17), brought into rotation and, at...
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6238516 |
System and method for cleaning, processing, and recycling materials
Washing machines are uiized to recycle plastic and cellulose from disposed diapers. The disposed diapers are loaded into a washing machine and, while being agitated, are washed in water, alkali and...
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6231718 |
Two phase ozone and oxygen pulp treatment
In the post-digestion treatment of kraft cellulosic pulp, the improvement comprising subjecting the pulp to a two-phase process in which the two-phases are substantially identical and each phase...
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6221208 |
Method for heating and pressuring a fibre pulp suspension during transportation to a bleaching reactor
A method for treating a fiber pulp suspension, which comprises transporting the fiber pulp suspension from a maintenance vessel, in which there is atmospheric pressure or at most 1 bar overpressure...
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6214165 |
Method for deacidification of papers and books by fluidizing a bed of dry alkaline particles
Lignocellulosic materials such as paper are deacidified by exposure to acoustically agitated submicron alkaline particles which adhere to the materials being treated. The alkaline particles...
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6200417 |
Process and device for mixing stock suspensions
Process and device for the mixing of suspensions with possibly different natures and/or compositions in the stable section of a paper machine. In the process, a suspension, particularly of the...
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6162324 |
Oxygen delignification of medium consistency pulp slurry using two alkali additions
An improved process is described for oxygen delignification of medium consistency pulp slurry which teaches control parameters and their resultant effect on final product characteristics....
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6139685 |
Method and device for treating a pulp suspension
The present invention relates to a method for treating a pulp suspension in which the suspension is rotated in a rotationally symmetrical, rapidly rotating and permeable screen basket so that the...
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6123808 |
Distribution of dilution liquor to the discharge of a cellulose pulp digester
In a pulp treatment vessel, such as a kraft pulp continuous vertical digester, a cellulose slurry is caused to flow in the vessel interior in a flow path. A substantially annular void is formed at...
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