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WO2021110188A1 - Procédé et dispositif de production d'un matériau fibreux, comportant un système d'alimentation et un système à vis hélicoïdales - Google Patents

Procédé et dispositif de production d'un matériau fibreux, comportant un système d'alimentation et un système à vis hélicoïdales Download PDF

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Publication number
WO2021110188A1
WO2021110188A1 PCT/DE2020/000289 DE2020000289W WO2021110188A1 WO 2021110188 A1 WO2021110188 A1 WO 2021110188A1 DE 2020000289 W DE2020000289 W DE 2020000289W WO 2021110188 A1 WO2021110188 A1 WO 2021110188A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw
steam
screw system
plant material
refiner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DE2020/000289
Other languages
German (de)
English (en)
Inventor
Thomas WISCHEROPP
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Klingele Papierwerke & Co KG GmbH
Original Assignee
Klingele Papierwerke & Co KG GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102019008351.2A external-priority patent/DE102019008351A1/de
Priority claimed from DE102019008449.7A external-priority patent/DE102019008449A1/de
Application filed by Klingele Papierwerke & Co KG GmbH filed Critical Klingele Papierwerke & Co KG GmbH
Publication of WO2021110188A1 publication Critical patent/WO2021110188A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means
    • D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/36—Explosive disintegration by sudden pressure reduction
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Definitions

  • the invention relates to a method with the following steps: comminuting non-wood plant material so that it can be conveyed through a screw system, mixing with a carbonate solution and mixing for 5 to 20 minutes.
  • This method is suitable for providing a reinforcing material for waste paper in order to maintain or increase the strength in the paper.
  • Such processes are based on the problem that the recycled paper that can be reused is getting worse and worse.
  • the ash content increases and the strength of the paper decreases.
  • the aim is to produce paper fibers from non-wood plant material for the production of corrugated base paper or cardboard.
  • the fiber-fiber bond is therefore important for increasing strength, which only occurs when the lignin on the fiber is withdrawn, the fiber is exposed and can be fibrillated. This can be achieved by adding a mild solvent such as sodium carbonate.
  • the sodium carbonate dissolves the lignin. In the case of a purely mechanical digestion, the fiber is not sufficiently exposed to lignin.
  • the invention is therefore based on the object of providing a method with which fiber material can be produced which, when mixed with waste paper, increases the strength and can be used as a cellulose substitute.
  • This object is achieved with a generic method in which steam is added to the material at 2 to 15 bar overpressure during the mixing process and the material is fiberized after mixing with a steam explosion valve or with a CTMP refiner. With a CTMP refiner, the material is defibrated while maintaining high pressure and high temperature.
  • the nonwood plant material can be pretreated, for example, for 3 to 5 minutes at 110 to 130 ° C hot steam.
  • the lignin and the fiber composite soften and begin to dissolve.
  • the material is then frayed between the edges of the refiner. This fiberization can be done in several passes in order to gently win the individual fibers.
  • the softened wood chips are pre-shredded at overpressure and in a second refiner the coarse pulp can be further defibrated at atmospheric pressure. Due to the thermal pretreatment, the properties approach those of expensive cellulose in some cases.
  • the material is chemically pretreated and then treated in the CTMP refiner and only then is the pressure released in a vapor separator.
  • the mixture of carbonate solution and comminuted non-wood plant material is 1 - 20% Na CC dry matter (TS) and 99% to 80% dry matter (TS) nonwood plant material and preferably 2 - 8% Na CO j dry substance and 98 to 92% nonwood plant material and particularly preferably 3 - 5% Na CC dry substance and 97-95% nonwood plant material.
  • a suitable carbonate solution is, for example, a sodium carbonate solution.
  • Sodium carbonate is polymorphic, i.e., depending on pressure and temperature, with the same chemical composition, it crystallizes in different crystal systems that are anhydrous or may contain water of crystallization.
  • Anhydrous Na2CC is known as mineral natrite or under the name of calcined soda. This white substance forms at temperatures above 107 ° C.
  • Sodium carbonate can, however, also be in the form of monohydrate (thermonatrite), dihydrate (pirssonite), pentahydrate (soda calcite), heptahydrate, decahydrate or hydrogen carbonate.
  • the plant material is preferably mixed in a screw system.
  • the non-wood plant material can, for example, first be mixed by adding 2 to 8% of a Na2CC> 3 solution and then held in a penetration screw for 5 to 20 minutes and mixed further.
  • a screw system with a plug screw can be used to build up pressure.
  • the non-wood plant material impregnated and heated in this way is fed to a steam explosion valve or a CTMP refiner in order to reduce the pulp.
  • steam and fibers are present as two separate materials.
  • the released steam is separated and the fiber material is treated further.
  • remaining Na2CC> 3 solution can also be separated from the material after defibration.
  • the material can be thinned, washed, thinned again, sorted and further negotiated in an LC Refmer after defibering.
  • the material can be thickened during washing.
  • a machine that produces MFC micro fibrillated cellulose
  • the washed-out Na2C03 solution with lignin and hemicellulose can be fed to a wastewater treatment plant.
  • the object on which the invention is based is achieved with a device for producing pulp with a feed system and a screw system with a steam addition device, which has a steam explosion valve or a CTMP refmer.
  • the screw system preferably has a plug screw and a downstream penetration screw.
  • Figure 1 shows a system with a steam explosion system
  • FIG. 2 schematically the individual process steps of an exemplary embodiment
  • FIG. 3 shows a system with a CTMP refmer and FIG. 4 shows another system with a CTMP refmer.
  • the steam explosion system shown in the exemplary embodiment shown in FIG. 1 is used to produce pulp from straw via a steam explosion valve.
  • straw for example, Miskantus or sugar cane can be used as Starting material can be used.
  • the method is described using straw as an example, although it is suitable for any nonwood plant material.
  • the straw Before the straw is treated with the device 1, the straw is comminuted in a hammer mill at 1500 revolutions / minute and sieves with a diameter of 20 mm.
  • the shredded straw material 2 is then conveyed and pressed via the conveyor belt 3 by means of a plug screw 4 and mixed with an Na 2 CC> 3 solution via the feed line 5.
  • the plug screw 4 is followed by a penetration screw 6, in which steam at 2 to 15 bar overpressure is added to the material via steam nozzles 7.
  • the steam explosion valve 8 is connected to the heat retention section in the penetration screw 7 and then steam 10 and fiberized material 11 are separated in a cyclone 9.
  • the non-wood plant material is straw 20, which is comminuted in a hammer mill 21. From there the comminuted non-wood plant material arrives in a feed system 22 and is further conveyed first into a plug screw 23 and then further into a penetration screw 24. As a solvent 25, sodium carbonate is fed between the feed system 22 and the plug screw 23, between the plug screw 23 and the penetration screw 24 and directly to the penetration screw 24.
  • the material is diluted again with water 32 and then goes to a sorting system 34. From there, the sorted out material goes to a thickener 38. Subsequently, part 39 is removed in a partial discharge and the remainder is returned to the feed system 22 .
  • the fiber material arrives in an LC refiner 35 and then into a fine sorter 36 and from there into the paper machine 37.
  • the CTMP refiner system shown in the exemplary embodiment shown in FIG. 3 is used to produce pulp from straw by means of a CTMP refiner.
  • a CTMP refiner instead of straw, for example, Miskantus or sugar cane can be used as the starting material.
  • the method is described using straw as an example, although it is suitable for any nonwood plant material.
  • the straw Before the straw is treated with the device 1 ' , the straw is comminuted in a hammer mill at 1500 revolutions / minute and sieves with a diameter of 20 mm.
  • the shredded straw material 2 ' is then pretreated hot under excess pressure and with superheated steam in a presteaming container 3' and then conveyed and pressed by means of a plug screw 4 'and mixed with a Na CC> solution via the feed line 5'.
  • a preheater 6 ' is provided as a heat-holding section, from which the material arrives via the screw T to the CTMP refiner 8'.
  • steam 10' and fiberized material 11 ' are separated.
  • Steam 12 ' is thus fed to the presteaming container 3', the preheater 6 'and the CTMP refiner 8'.
  • steam 12 ' also reaches the CTMP refiner 8' via line 13 ' from the preheater 6'.
  • FIG. 4 shows a further exemplary embodiment.
  • the comminuted plant material 40 reaches a plug screw 42 via a screw 41.
  • the material is provided with carbonate 44.
  • the mixture then passes into a penetration screw 45.
  • Steam 46 is fed in there in order to heat the material under excess pressure. From there, the heated material arrives in a closed system 47 to a CTMP refiner 48.
  • a subsequent expansion tank 49 steam 50 and fiberized material 51 are separated, which is then conveyed further with a pump 52.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paper (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

L'invention concerne un procédé comprenant les étapes consistant à : broyer un matériel végétal non ligneux pour qu'il soit transportable à l'aide d'un système à vis hélicoïdales ; mélanger avec une solution de carbonate ; procéder à un mélange intime pendant 5 à 20 min., ajouter au matériel de la vapeur d'une pression positive comprise entre 2 et 15 bars ; et, une fois le mélange intime effectué, défibrer le matériel à l'aide d'une soupape d'explosion de vapeur ou d'un raffineur CMPT.
PCT/DE2020/000289 2019-12-03 2020-11-23 Procédé et dispositif de production d'un matériau fibreux, comportant un système d'alimentation et un système à vis hélicoïdales Ceased WO2021110188A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102019008351.2 2019-12-03
DE102019008351.2A DE102019008351A1 (de) 2019-12-03 2019-12-03 Verfahren und Vorrichtung zur Herstellung von Faserstoff mit einem Zuführsystem und einem Schneckensystem
DE102019008449.7 2019-12-05
DE102019008449.7A DE102019008449A1 (de) 2019-12-05 2019-12-05 Verfahren sowie Vorrichtung zur Herstellung von Faserstoff mit einem Zuführsystem und einem Schneckensystem

Publications (1)

Publication Number Publication Date
WO2021110188A1 true WO2021110188A1 (fr) 2021-06-10

Family

ID=74141228

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2020/000289 Ceased WO2021110188A1 (fr) 2019-12-03 2020-11-23 Procédé et dispositif de production d'un matériau fibreux, comportant un système d'alimentation et un système à vis hélicoïdales

Country Status (1)

Country Link
WO (1) WO2021110188A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229251A (en) 1974-12-09 1980-10-21 Domtar, Inc. High-yield semi-chemical carbonate pulping process
WO1987001402A1 (fr) * 1985-09-03 1987-03-12 Chaudhuri Punya B Procede de production de pate de cellulose
CA2065939A1 (fr) * 1992-04-13 1993-10-14 Bohuslav V. Prof. Kokta Methode de reduction en pate par procede d'explosion a la vapeur utilisee dans la fabrication du papier a partir de plantes annuelles
DE4490578T1 (de) * 1993-02-09 1995-04-13 Air Liquide Verfahren zur Herstellung von chemisch-thermomechanischen Papierbreien (CTMP)
WO1997026401A1 (fr) * 1996-01-17 1997-07-24 E.Mc2 Developpement Procede de fabrication de pate a papier a partir de plantes lignocellulosiques et pate a papier obtenue
WO2000019004A1 (fr) * 1998-09-25 2000-04-06 Stake Technology Ltd. Traitement de vapocraquage semi-alcalin de materiau fibreux pour la production de pate a papier
DE102007036382A1 (de) * 2007-07-31 2009-02-05 Voith Patent Gmbh Lignocellulosischer Faserstoff aus Einjahrespflanzen
DE102017222748B3 (de) * 2017-12-14 2019-05-29 Hope Tree International Gmbh Verfahren zum faseraufschluss von baobab-fasern

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229251A (en) 1974-12-09 1980-10-21 Domtar, Inc. High-yield semi-chemical carbonate pulping process
WO1987001402A1 (fr) * 1985-09-03 1987-03-12 Chaudhuri Punya B Procede de production de pate de cellulose
CA2065939A1 (fr) * 1992-04-13 1993-10-14 Bohuslav V. Prof. Kokta Methode de reduction en pate par procede d'explosion a la vapeur utilisee dans la fabrication du papier a partir de plantes annuelles
DE4490578T1 (de) * 1993-02-09 1995-04-13 Air Liquide Verfahren zur Herstellung von chemisch-thermomechanischen Papierbreien (CTMP)
WO1997026401A1 (fr) * 1996-01-17 1997-07-24 E.Mc2 Developpement Procede de fabrication de pate a papier a partir de plantes lignocellulosiques et pate a papier obtenue
WO2000019004A1 (fr) * 1998-09-25 2000-04-06 Stake Technology Ltd. Traitement de vapocraquage semi-alcalin de materiau fibreux pour la production de pate a papier
DE102007036382A1 (de) * 2007-07-31 2009-02-05 Voith Patent Gmbh Lignocellulosischer Faserstoff aus Einjahrespflanzen
DE102017222748B3 (de) * 2017-12-14 2019-05-29 Hope Tree International Gmbh Verfahren zum faseraufschluss von baobab-fasern

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