EP1874999A1 - Procede pour traiter des matieres premieres de fibres de papier - Google Patents

Procede pour traiter des matieres premieres de fibres de papier

Info

Publication number
EP1874999A1
EP1874999A1 EP06723790A EP06723790A EP1874999A1 EP 1874999 A1 EP1874999 A1 EP 1874999A1 EP 06723790 A EP06723790 A EP 06723790A EP 06723790 A EP06723790 A EP 06723790A EP 1874999 A1 EP1874999 A1 EP 1874999A1
Authority
EP
European Patent Office
Prior art keywords
paper
grinding
carried out
fractionation
fibers
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.)
Withdrawn
Application number
EP06723790A
Other languages
German (de)
English (en)
Inventor
Martin Kemper
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.)
Voith Patent GmbH
Original Assignee
Voith Patent 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
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1874999A1 publication Critical patent/EP1874999A1/fr
Withdrawn legal-status Critical Current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
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force
    • D21D5/24—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force in cyclones
    • 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
    • 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
    • D21D1/28—Ball or rod mills
    • 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
    • D21D1/34—Other mills or refiners
    • D21D1/38—Other mills or refiners with horizontal shaft
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp

Definitions

  • the invention relates to processes for the preparation of paper fiber raw materials according to the preamble of claim 1.
  • SC and LWC papers Paper grades to be smoothed by Supercalender (SC) or coated in a thin paper web (LWC).
  • SC Supercalender
  • LWC thin paper web
  • these grades are used as graphic papers, where the quality requirements are known to be particularly high. Since such papers are relatively thin, often only a tenth of a millimeter thick after the satin finish, it is important that the raw materials contain only those fibers that do not interfere with these thin sheet shapes or make the paper appear uneven. It is also to avoid that soft pulp fibers are compressed so much by hard fibers or hard fiber fragments in the satinization that the opacity is lost ("black satin").
  • Pulp-containing raw materials may be waste paper, fresh wood pulp or a mixture of both.
  • Wood pulp fibers are obtained by the "timber either mechanically (MP) or thermo-mechanical (TMP) or mechanically processed with the aid of chemicals (CTMP) is.
  • CMP thermo-mechanical
  • CP chemically digested pulps
  • Woodfree pulps can also contain hard, stiff fibers that interfere with the production of thin papers.
  • the invention is based on the object, a method for the treatment of paper fiber raw materials, in particular wood pulp-containing raw materials, such. Waste paper to create, with the most extensive protection of the fibers a paper pulp can be produced, which meets the requirements already mentioned.
  • Texture in particular thickness and / or rigidity for the specified
  • the effect is to make the fibers more flexible without significantly reducing their length.
  • the fiber surface is not or significantly less fibrillated. 3.
  • the specific grinding work to achieve the desired strengths is generally lower.
  • the process can be combined with further grinding steps.
  • the fractionation can be carried out in pressure sorters with slotted or perforated sieves at about 3 to 4% consistency (solids content) (possibly also 1 to 1, 5%).
  • the screens can have a smooth surface.
  • a hydrocyclone fractionation can be carried out in which stiff fibers, but especially fiber fragments, enter the overflow with the help of strong centrifugal fields and edge effects on the inner wall of the hydrocyclone. These are just the parts that come mainly from the wood pulp and are still too stiff and / or too thick. Often they are less swollen and therefore significantly heavier than the suspension. For hydrocyclone fractionation, the most favorable range is about 1% consistency.
  • Fractionation can be multi-step to increase the selectivity.
  • the combination of screening devices and hydrocyclones eg in two successive stages
  • Both methods often have different separation characteristics, so that a combination can lead to a better selectivity.
  • the choice of the sequence offers a further possibility of influencing the fractionation effect.
  • FIG. 1 shows an exemplary process scheme for carrying out the method according to the invention
  • FIG. 2 shows schematically an example of a method suitable for the method
  • the process scheme shown in Fig. 1 represents the essential process steps of the invention by way of example.
  • the pulp suspension S dissolved e.g. in the pulper, and after a removal of contaminants in a fractionation 1 is introduced.
  • This is e.g. a wet sieving, which works with very small slits whose width is preferably about 0.1 to 0.2 mm.
  • Such slits pass with the fine fraction 2 only soft and thin fibers, with the result that the hard, rigid yet not suitable for the desired paper quality fibers are concentrated in the overflow 3 of the fractionation 1.
  • This is then ground in a special grinding process, the compression milling 4, very gently.
  • the grinding device is only hinted at here.
  • the grinding energy supplies a motor 15.
  • FIG. 2 shows, by way of example, a grinding device for compression grinding with which the method can be carried out. It has a horizontal grinding cylinder 7 in which a plurality of uniformly arranged around the circumference of the grinding rollers 8 are. This figure shows five grinding rollers 8. Their total number is 8. The grinding rollers are each provided with a larger number of grinding strips 9, which can also be described as a knife.
  • a grinding zone is formed between the grinding roller 8 and the grinding cylinder 7, namely at the point at which the inner wall of the grinding cylinder 7 and the grinding bars 9 are closest.
  • the grinding rollers 8 are pressed radially against the inner wall of the grinding cylinder 7.
  • a spring 10 is shown.
  • the grinding rollers 8 are rotatably mounted with fixed axes of rotation. They can be fixed, for example, by way of two stands 11 extending axially into the grinding cylinder.
  • the grinding cylinder 7 is rotated by a drive roller 12 in rotation.
  • the grinding rollers 8 do not require their own drive, since they are placed on the inner wall of the grinding cylinder 7 in rotation. This means a substantial simplification of the grinding device.
  • the aqueous suspended paper fibers are brought by means of one or more pipes 13 in the vicinity of the inner wall.
  • Such a pipeline Such a pipeline
  • the grinding rollers are not shown.
  • the aqueous suspended paper fibers form as a fibrous material layer 14 on its inner wall. Since both the pipe 13 and the stator 11 are arranged fixed in space, it is easily possible, the
  • Circumferential direction accelerates and spreads to the inner wall of the
  • This device described in FIG. 2 is known from DE 103 37 921.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un procédé servant à traiter des matières premières de fibres de papier, notamment contenant de la pâte mécanique, par exemple de vieux papiers, à partir desquelles sont produits des papiers minces, par exemple des papiers satinés ou des papiers couchés légers. Ce procédé consiste à former une suspension de matières fibreuses (S) puis à l'acheminer à une unité de fractionnement (1), la fraction grossière (3) étant enrichie en fibres rigides et la fraction fine (2) en fibres souples, et à broyer ensuite la fraction grossière (3) dans une unité de broyage par compression (4).
EP06723790A 2005-04-15 2006-03-29 Procede pour traiter des matieres premieres de fibres de papier Withdrawn EP1874999A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005017433 2005-04-15
PCT/EP2006/002821 WO2006108508A1 (fr) 2005-04-15 2006-03-29 Procede pour traiter des matieres premieres de fibres de papier

Publications (1)

Publication Number Publication Date
EP1874999A1 true EP1874999A1 (fr) 2008-01-09

Family

ID=36579829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06723790A Withdrawn EP1874999A1 (fr) 2005-04-15 2006-03-29 Procede pour traiter des matieres premieres de fibres de papier

Country Status (2)

Country Link
EP (1) EP1874999A1 (fr)
WO (1) WO2006108508A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112941948A (zh) * 2021-01-26 2021-06-11 陕西东方环保产业集团东鹏再生资源利用有限公司 一种废纸制浆系统及工艺

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007002514A1 (de) * 2007-01-17 2008-07-24 Voith Patent Gmbh Verfahren zum Herstellen von hochwertigen Papieren
DE102008009134A1 (de) * 2008-02-14 2009-08-20 Voith Patent Gmbh Verfahren zur Entfernung von Störstoffen aus einer wässrigen Faserstoffsuspension
US10041209B1 (en) 2015-08-21 2018-08-07 Pulmac Systems International, Inc. System for engineering fibers to improve paper production
US10941520B2 (en) 2015-08-21 2021-03-09 Pulmac Systems International, Inc. Fractionating and refining system for engineering fibers to improve paper production
US11214925B2 (en) 2015-08-21 2022-01-04 Pulmac Systems International, Inc. Method of preparing recycled cellulosic fibers to improve paper production

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE513596C2 (sv) * 1999-02-22 2000-10-09 Stora Kopparbergs Bergslags Ab Metod vid tillverkning av papper eller kartong
DE19960218A1 (de) * 1999-12-14 2001-06-28 Voith Paper Patent Gmbh Verfahren zum Fraktionieren einer Papierfasersuspension
DE10057682A1 (de) * 2000-11-21 2002-05-23 Voith Paper Patent Gmbh Verfahren zur Mahlung eines Faserstoffes
DE10236962A1 (de) * 2002-08-13 2004-02-26 Institut für Papier-, Zellstoff- und Fasertechnik der Technischen Universität Graz Verfahren zur Faserstoffbehandlung
DE10337921A1 (de) * 2003-08-18 2005-03-17 Voith Paper Patent Gmbh Verfahren zur Mahlung von wässrig suspendierten Papier- oder Zellstofffasern

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006108508A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112941948A (zh) * 2021-01-26 2021-06-11 陕西东方环保产业集团东鹏再生资源利用有限公司 一种废纸制浆系统及工艺

Also Published As

Publication number Publication date
WO2006108508A1 (fr) 2006-10-19

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