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WO1996038625A1 - Procede et installation de desintegration d'un materiau cellulosique - Google Patents

Procede et installation de desintegration d'un materiau cellulosique Download PDF

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Publication number
WO1996038625A1
WO1996038625A1 PCT/AT1996/000064 AT9600064W WO9638625A1 WO 1996038625 A1 WO1996038625 A1 WO 1996038625A1 AT 9600064 W AT9600064 W AT 9600064W WO 9638625 A1 WO9638625 A1 WO 9638625A1
Authority
WO
WIPO (PCT)
Prior art keywords
cellulose
cellulosic material
comminuted
pulp
crushing
Prior art date
Application number
PCT/AT1996/000064
Other languages
German (de)
English (en)
Inventor
Stefan Zikeli
Dieter Eichinger
Peter Hinterholzer
Original Assignee
Lenzing Aktiengesellschaft
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3502658&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1996038625(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Lenzing Aktiengesellschaft filed Critical Lenzing Aktiengesellschaft
Priority to AT96908908T priority Critical patent/ATE182378T1/de
Priority to DE59602474T priority patent/DE59602474D1/de
Priority to JP8536022A priority patent/JPH10503562A/ja
Priority to AU52601/96A priority patent/AU5260196A/en
Priority to EP96908908A priority patent/EP0767848B1/fr
Priority to BR9606401A priority patent/BR9606401A/pt
Publication of WO1996038625A1 publication Critical patent/WO1996038625A1/fr
Priority to NO970364A priority patent/NO970364L/no

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • 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
    • D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
    • D21B1/066—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods the raw material being pulp sheets

Definitions

  • the invention relates to a method and a plant for comminuting a cellulosic material, in particular for comminuting pulp.
  • NMMO N-Methylmorpholine-N-oxide
  • Other amine oxides are e.g. in EP-A - 0 553 070.
  • a method of making moldable cellulose solutions is e.g. known from EP-A-0 356 419.
  • the production of cellulosic moldings using tertiary amine oxides is generally referred to as the amine oxide process.
  • EP-A-0 356 419 describes an amine oxide process for producing spinnable cellulose solutions, which uses, among other things, a suspension of cellulose in liquid, aqueous N-methylmorpholine-N-oxide (NMMO) as the starting material.
  • NMMO N-methylmorpholine-N-oxide
  • This method consists in the suspension being continuously and continuously converted into a moldable solution in a thin-film treatment apparatus.
  • the moldable solution is finally spun in a molding tool, for example a spinneret, into filaments which are passed through a precipitation bath.
  • a suspension of cellulose in the aqueous, tertiary amine oxide serves as the starting material for the production of the moldable cellulose solution.
  • This suspension is produced by crushing cellulose and introducing it into the aqueous amine oxide solution in a mixer.
  • WO 94/28217 discloses a process for producing a premix based on comminuted cellulose, from which a moldable cellulose solution can be produced.
  • Cellulose in roll form serves as the starting material.
  • the pulp is comminuted in a cutting device, and the comminuted pulp is blown by air into a pulp separator in which the comminuted pulp is separated into two fractions: a first fraction, which has a particle size of at most 2.54 mm, and one Dust fraction.
  • the dust fraction is entrained by the conveying air and only separated from it in a filter.
  • the filtered dust fraction is then combined again with the first fraction and used to produce the cellulose suspension.
  • the object of the invention is therefore to provide a method and a system with which the disadvantages mentioned above can be overcome.
  • the cellulosic material is pre-crushed to form particles of different size fractions
  • the particles formed in the pre-comminution are transported without separation of any size fraction to a device in which the particles are further comminuted.
  • the particles formed in the pre-comminution are best transported using a gas.
  • the process according to the invention is preferably carried out continuously.
  • the process according to the invention can advantageously be used to form a comminuted cellulosic material which is particularly suitable for the preparation of a suspension of cellulose in an aqueous tertiary amine oxide for the amine oxide process.
  • the invention also relates to a plant for carrying out the method according to the invention, which plant is characterized by the following features:
  • a conveying line for pre-comminuted cellulosic material which connects the first device and the at least one further device to one another, with the proviso that no branch is provided in the conveying line for pre-comminuted, cellulosic material.
  • a preferred embodiment of the plant according to the invention is that a discharge chute is provided which is in the first device for pre-shredding cellulosic Material opens out, and that means are provided with which cellulose in sheet form or cellulose in roll form can be introduced into the discharge chute.
  • Two devices for comminuting cellulosic material are advantageously provided in the plant according to the invention.
  • FIG. 1 shows an embodiment of the device according to the invention with a two-stage pulp comminution.
  • the reference number 1 denotes cellulose in sheet form (800 mm ⁇ 600 mm), which is transported with a conveyor belt 3 in a direction which is indicated by an arrow above the cellulose pulp 1.
  • the motor for driving the conveyor belt is not shown.
  • the cellulose sheets 1 are thrown into the discharge chute 6 as required and from the granulator 9 (type Condux CS 500/1000; screen perforation> 0.75 mm ) pre-shredded. In this way, pulp is fed intermittently.
  • the chute 6 is also fed pulp in roll form (800 mm wide).
  • pulp is drawn off the roll 2a from a feed device 10, which essentially consists of two conveying rollers which are driven by a motor (not shown), and into the Conveying shaft 6 is introduced. In this way, pulp can be fed continuously.
  • a second roll 2b with cellulose can be provided, from which cellulose can be removed while the roll 2a is being replaced.
  • the reference numerals 7 and 8 denote metal detectors with which it can be determined whether there are metal pieces in the pulp, for example residues of metal strips, which are usually used for packaging the pulp. If pieces of metal are detected, the metal detectors switch off the granulator 9 and the conveyor belt 3 or the feed device 10 in order to prevent the knives of the granulator 9 from being damaged.
  • the pulp pre-shredded in the granulator 9 enters the pipeline 12 (diameter: 150 mm), where it is caught by an air flow which is generated by the fan 11.
  • the air flow is expediently set to a value between 20 and 25 m / s with the fan 11, the loading of the air flow with pre-comminuted pulp depending on the particle size being between 0.25 and 2.5 kg / m 3 of air.
  • the pre-comminuted pulp is blown by the air flow into the cyclone 13, in which the pre-comminuted pulp settles out of the conveying gas.
  • the feed gas is fed via line 14 into the discharge chute 6.
  • the pre-shredded pulp enters the second granulator 15 (CS 500/1000; perforated screen ⁇ 20 mm), in which the pre-shredded pulp is further shredded to the desired particle size.
  • the shredded pulp finally reaches the delivery line 16 in which the pulp is entrained by the air flow generated by a fan 17 and can be conveyed, for example, into a storage container (not shown).
  • the two-stage shredding of the pulp not only enables the shredding performance of the two granulators to be better coordinated, it also prevents damage to the cellulose. It has also been found that a pulp dosage e.g. in a mixer, in which the comminuted pulp is introduced into the aqueous, tertiary amine oxide and the cellulose suspension is produced, is easier and more precisely possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Disintegrating Or Milling (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Saccharide Compounds (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Artificial Filaments (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un procédé de désintégration d'un matériau cellulosique, caractérisé en ce que la désintégration se fait en au moins deux phases, à savoir, (1) en effectuant un prébroyage du matériau cellulosique, ce qui conduit à la formation de particules correspondant à des fractions de grosseurs différentes, (2) en transportant les particules formées lors du prébroyage, sans séparation d'une fraction quelconque de particules de grosseurs différentes, vers un dispositif où ces particules continuent d'être désintégrées.
PCT/AT1996/000064 1995-05-30 1996-04-02 Procede et installation de desintegration d'un materiau cellulosique WO1996038625A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AT96908908T ATE182378T1 (de) 1995-05-30 1996-04-02 Anlage zum zerkleinern eines cellulosischen materials
DE59602474T DE59602474D1 (de) 1995-05-30 1996-04-02 Anlage zum zerkleinern eines cellulosischen materials
JP8536022A JPH10503562A (ja) 1995-05-30 1996-04-02 セルロース物質を破砕するためのプロセス及びプラント
AU52601/96A AU5260196A (en) 1995-05-30 1996-04-02 Process and plant for crushing a cellulose material
EP96908908A EP0767848B1 (fr) 1995-05-30 1996-04-02 Installation de desintegration d'un materiau cellulosique
BR9606401A BR9606401A (pt) 1995-05-30 1996-04-02 Processo e instalação para triturar um material celulósico
NO970364A NO970364L (no) 1995-05-30 1997-01-28 Fremgangsmåte og anlegg ved findeling av cellulosemateriale

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0091095A AT402306B (de) 1995-05-30 1995-05-30 Verfahren und anlage zum zerkleinern eines cellulosischen materials
ATA910/95 1995-05-30

Publications (1)

Publication Number Publication Date
WO1996038625A1 true WO1996038625A1 (fr) 1996-12-05

Family

ID=3502658

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT1996/000064 WO1996038625A1 (fr) 1995-05-30 1996-04-02 Procede et installation de desintegration d'un materiau cellulosique

Country Status (9)

Country Link
EP (1) EP0767848B1 (fr)
JP (1) JPH10503562A (fr)
AT (2) AT402306B (fr)
AU (1) AU5260196A (fr)
BR (1) BR9606401A (fr)
CA (1) CA2195409A1 (fr)
DE (1) DE59602474D1 (fr)
NO (1) NO970364L (fr)
WO (1) WO1996038625A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7364681B2 (en) 2002-01-08 2008-04-29 Stefan Zikeli Spinning device and method having cooling by blowing
US7614864B2 (en) 2002-01-28 2009-11-10 Stefan Zikeli Ergonomic spinning system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4596520B2 (ja) * 2004-08-25 2010-12-08 株式会社リブドゥコーポレーション パルプ粉砕装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3692246A (en) * 1971-06-14 1972-09-19 Williams Patent Crusher & Pulv Fluff preparation system and apparatus
WO1994028233A1 (fr) * 1993-05-24 1994-12-08 Courtaulds Fibres (Holdings) Limited Ameliorations apportees a la reduction en poudre de cartons de pate

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3692246A (en) * 1971-06-14 1972-09-19 Williams Patent Crusher & Pulv Fluff preparation system and apparatus
WO1994028233A1 (fr) * 1993-05-24 1994-12-08 Courtaulds Fibres (Holdings) Limited Ameliorations apportees a la reduction en poudre de cartons de pate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7364681B2 (en) 2002-01-08 2008-04-29 Stefan Zikeli Spinning device and method having cooling by blowing
US7614864B2 (en) 2002-01-28 2009-11-10 Stefan Zikeli Ergonomic spinning system

Also Published As

Publication number Publication date
EP0767848A1 (fr) 1997-04-16
NO970364D0 (no) 1997-01-28
DE59602474D1 (de) 1999-08-26
NO970364L (no) 1997-01-28
ATE182378T1 (de) 1999-08-15
EP0767848B1 (fr) 1999-07-21
BR9606401A (pt) 1997-12-23
JPH10503562A (ja) 1998-03-31
AU5260196A (en) 1996-12-18
ATA91095A (de) 1996-08-15
AT402306B (de) 1997-04-25
CA2195409A1 (fr) 1996-12-05

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