EP1508638A1 - Procédé de traitement d'une pâte contenant des cellules de vaisseaux perturbantes - Google Patents

Procédé de traitement d'une pâte contenant des cellules de vaisseaux perturbantes Download PDF

Info

Publication number
EP1508638A1
EP1508638A1 EP04015698A EP04015698A EP1508638A1 EP 1508638 A1 EP1508638 A1 EP 1508638A1 EP 04015698 A EP04015698 A EP 04015698A EP 04015698 A EP04015698 A EP 04015698A EP 1508638 A1 EP1508638 A1 EP 1508638A1
Authority
EP
European Patent Office
Prior art keywords
consistency
vascular cells
pulp
less
dispersion
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Withdrawn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
EP04015698A
Other languages
German (de)
English (en)
Inventor
Harald Selder
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 Paper 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 Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1508638A1 publication Critical patent/EP1508638A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • D21B1/34—Kneading or mixing; Pulpers

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • vascular cells As is well known, fresh pulps containing rapidly growing hardwoods, especially tropical hardwoods are used, so-called vascular cells (English: vessels), which have relatively large dimensions due to the climatic conditions. you Amount of pulp is usually at 3 to 5%. These vascular cells are used in the Pulp production are not removed and are in the paper made from such a pulp disturbing, because they are responsible for certain disadvantages. So it can be e.g. that happen Vascular cells break out of the paper structure, whereby the surface deteriorates and the Paper properties are impaired. Unlike the pulp fibers, they are hydrophobic Character.
  • the invention is therefore based on the object to provide a method with which it is possible to reduce the disadvantages that result from the content of vascular cells, or completely eliminate and at the same time the desired properties, such as specific volume, if possible to obtain.
  • vascular cells threatening loss of quality for the pulp produced later paper no longer occur.
  • the vast majority of vascular cells can be removed, and they may not removed vascular cells are anchored (fused) in the fiber composite so that they remain in it, even if the paper is claimed.
  • the process is usually used in stock preparation at a paper mill. It can but also already be carried out in the pulp mill after digestion.
  • Fig. 1 shows an important example for carrying out the method. That is how it works Pulp 1 in suspended form or after - not shown - dissolution in water and possibly Pre-cleaning in a thickener 2 brought to a consistency between 15 and 35%.
  • the Subsequent dispersion takes place here in a known per se from the waste paper preparation Disk disperger 3. In other cases a kneading disperger can be used.
  • the trimmings of disk dispersers have a very large number of slots and become relatively fast moving past each other.
  • An example is shown in DE 30 47 013 A1. Knetdisperger contrast (see, e.g. DE 42 37 433 A1) have a coarser structure and work with less Relative speeds.
  • the latter usually consists of a large number of highly efficient hydrocyclones, so-called cleaners, working with centrifugal fields that reach at least 200 times the gravitational acceleration.
  • cleaners working with centrifugal fields that reach at least 200 times the gravitational acceleration.
  • These are also known from waste paper processing.
  • With the reject 7 of these cleaners will be Vascular cells deposited while accepting 8 a raw material for flawless paper quality represents. Besides the benefit of Accept 8, there are no harmful vascular cells to contain the fibers in good condition, especially what drainage properties on the Paper machine and specific volume of the paper produced.
  • the in the reject 7 contained fibers may by other - not shown - Cleanerpawn possibly in combination be recovered with mechanical processing.
  • the particle size 9 of the vascular cells in the range of 0.1 to 1 mm below applied, increasing to the right.
  • the ordinate shows the area-related frequency 10 of the vascular cells found in the sample sheet, for example measured in 1 / mm 2 .
  • the diagram has four curves that represent the relationship, depending on the treatment experienced by the pulp used. The uppermost of these curves, the curve 11, represents the frequency distribution of the vascular cells in the pulp 1, ie before it has been subjected to the process according to the invention. It turns out that in the initial state, the area-related frequency 10 is relatively high for a small particle size 9 and decreases to larger particle sizes. The merely dispersed substance 4 already has a significantly better quality, which is shown schematically in the curve 13.
  • the acceptance 8 of the hydrocyclones has the distribution registered in curve 14, ie there are hardly any vascular cells present.
  • the curve 12 has been determined, which lies between the curves 11 and 13 and describes the state after hydrocyclone, bypassing the disk disperger 3. It can therefore be stated that the dispersion already achieves the stated object and that in particular an excellent pulp can be produced by the combination of both process steps, which is practically free of disturbing vascular cells.
  • the diagram according to FIG. 2 is intended to show the relationships only qualitatively. It is depending on Pulp species and choice of parameters deviations from this course possible, with the However, fundamental improvement by the inventive method clearly confirmed.
  • the accept 8 of the hydrocyclone unit 6 After dispersion and any dilution of the pulp the accept 8 of the hydrocyclone unit 6 again be added, so that a suspension 15 is formed, which is free of interfering vascular cells.
  • the in the accept 8 'of the hydrocyclone unit 6 remaining vascular cells are so small that they little disturbing even without dispersion of this partial stream.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Medicines Containing Plant Substances (AREA)
EP04015698A 2003-08-18 2004-07-03 Procédé de traitement d'une pâte contenant des cellules de vaisseaux perturbantes Withdrawn EP1508638A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10337821 2003-08-18
DE2003137821 DE10337821B3 (de) 2003-08-18 2003-08-18 Verfahren zur Behandlung von störende Gefäßzellen enthaltendem Zellstoff

Publications (1)

Publication Number Publication Date
EP1508638A1 true EP1508638A1 (fr) 2005-02-23

Family

ID=33521565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04015698A Withdrawn EP1508638A1 (fr) 2003-08-18 2004-07-03 Procédé de traitement d'une pâte contenant des cellules de vaisseaux perturbantes

Country Status (4)

Country Link
EP (1) EP1508638A1 (fr)
AU (1) AU2004203404A1 (fr)
BR (1) BRPI0403189A (fr)
DE (1) DE10337821B3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1889971A1 (fr) * 2006-08-18 2008-02-20 Voith Patent GmbH Procédé destiné au traitement d'un mélange de fibres de papier

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006012835B3 (de) * 2006-03-21 2007-11-15 Voith Patent Gmbh Verfahren zur Behandlung von störende Gefäßzellen enthaltendem Zellstoff
US10385508B2 (en) 2016-03-24 2019-08-20 The Procter & Gamble Company Process for producing strong and soft tissue and towel products

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0568404A1 (fr) * 1992-04-17 1993-11-03 Kimberly-Clark Corporation Procédé de traitement de fibres papeterie pour la fabrication de papier absorbant
DE19816621A1 (de) * 1998-04-15 1999-11-04 Voith Sulzer Papiertech Patent Verfahren zur Mahlung von Laubholz-Zellstoff
EP1147804A1 (fr) * 2000-04-11 2001-10-24 Voith Paper Patent GmbH Appareil pour disperser une pâte à papier de haute consistence et garnitures pour cet appareil

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT375417B (de) * 1980-11-25 1984-08-10 Escher Wyss Gmbh Dispergiervorrichtung fuer die aufbereitung von altpapierstoff
DE4237433C2 (de) * 1992-11-06 1994-05-11 Voith Gmbh J M Stoffknetmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0568404A1 (fr) * 1992-04-17 1993-11-03 Kimberly-Clark Corporation Procédé de traitement de fibres papeterie pour la fabrication de papier absorbant
DE19816621A1 (de) * 1998-04-15 1999-11-04 Voith Sulzer Papiertech Patent Verfahren zur Mahlung von Laubholz-Zellstoff
EP1147804A1 (fr) * 2000-04-11 2001-10-24 Voith Paper Patent GmbH Appareil pour disperser une pâte à papier de haute consistence et garnitures pour cet appareil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1889971A1 (fr) * 2006-08-18 2008-02-20 Voith Patent GmbH Procédé destiné au traitement d'un mélange de fibres de papier

Also Published As

Publication number Publication date
DE10337821B3 (de) 2005-01-13
AU2004203404A1 (en) 2005-03-10
BRPI0403189A (pt) 2005-05-24

Similar Documents

Publication Publication Date Title
EP1728918A2 (fr) Procédé pour séparer des impuretés d'une suspension aqueuse de fibres
DE2053419A1 (de) Verfahren und Vorrichtung zum Mahlen von Papierstoff
EP1799903A1 (fr) Procede pour fractionner une suspension aqueuse de fibres a papier et hydrocyclone pour la mise en oeuvre dudit procede
DE69923603T2 (de) Aufwertung von tmp-faserstoff zu einer sc/lwc qualität
DE2834907C2 (de) Verfahren zur Herstellung von Holzschliff
EP1798329B1 (fr) Procédé pour enlever des contaminants d'une suspension aqueuse de fibres
DE102007029806A1 (de) Verfahren zur Aufbereitung von Altpapier
DE69912761T2 (de) Verfahren und vorrichtung zur herstellung von cellulosebrei mit verbesserten eigenschaften
WO2006108508A1 (fr) Procede pour traiter des matieres premieres de fibres de papier
AT501932A1 (de) Verfahren zum wiederaufbereiten von altpapier
DE102008063785A1 (de) Verfahren zur Aufbereitung von Altpapier enthaltenden Rohstoffen zu einer zur Erzeugung graphischer Papiere geeigneten Faserstoffsuspension
DE10337821B3 (de) Verfahren zur Behandlung von störende Gefäßzellen enthaltendem Zellstoff
DE10135699A1 (de) Verfahren zur Aufbereitung von Trockenausschuss
DE3029978A1 (de) Verfahren zum reinigen von holzschliff und vorrichtung zur durchfuehrung des verfahrens
DE102005016192A1 (de) Verfahren zum Auflösen und Reinigen von störstoffhaltigen Papierrohrstoffen
DE10132743A1 (de) Verfahren zur Aufteilung eines aus mehreren Papiersorten bestehenden Rohstoffes in mindestens zwei Papierfraktionen
DE3409121C2 (fr)
EP1921205A1 (fr) Procédé de suppression de fibres, fragments de fibres ou cellules vasculaires indésirables d'une suspension aqueuse de matières fibreuses
DE19938976A1 (de) Verfahren zur Aufbereitung eines holzstoffhaltigen Papierfaser-Rohstoffes
EP0828026B1 (fr) Procédé pour l'épuration d'une suspension de fibres primaires
DE69931007T2 (de) Verfahren und Anlage zur Herstellung von Papiermassen
DE102008013458A1 (de) Verfahren zur Entfernung von Störstoffen aus einer wässrigen Faserstoffsuspension
DE19808355A1 (de) Verfahren zur Mahlung von Papierfasern
DE1561702C (de) Verfahren zum Abtrennen von langgestreckten oder flächigen Verunreinigungen mit geringem spezifischem Gewicht aus Fasersuspensionen durch Hydrozyklone. '
DE678374C (de) Verfahren zur Herstellung von Papierstoff aus Halbstoffen, die erstmalig durch Mahlen in Ganzstoff uebergefuehrt werden

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

17P Request for examination filed

Effective date: 20050823

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VOITH PATENT GMBH

17Q First examination report despatched

Effective date: 20070702

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20091124