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WO2012004196A1 - Ions métalliques - Google Patents

Ions métalliques Download PDF

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Publication number
WO2012004196A1
WO2012004196A1 PCT/EP2011/061086 EP2011061086W WO2012004196A1 WO 2012004196 A1 WO2012004196 A1 WO 2012004196A1 EP 2011061086 W EP2011061086 W EP 2011061086W WO 2012004196 A1 WO2012004196 A1 WO 2012004196A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulp suspension
metal ions
electrolysis
solvent
ions
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/EP2011/061086
Other languages
German (de)
English (en)
Inventor
Christian Naydowski
Thomas Wurster
Armin Bauer
Helmut Heinzmann
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 WO2012004196A1 publication Critical patent/WO2012004196A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
    • D21F1/82—Pulp catching, de-watering, or recovering; Re-use of pulp-water adding fibre agglomeration compositions
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/06—Paper forming aids
    • D21H21/10—Retention agents or drainage improvers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds

Definitions

  • the invention relates to a method for supporting the sizing and / or fixing of contaminants and / or to increase the retention in a
  • Pulp suspension by means of metal ions Pulp suspension by means of metal ions.
  • the invention also relates to devices for aiding the sizing and / or fixing of contaminants and / or increasing the retention in one
  • Pulp suspension by means of metal ions in particular for carrying out the method.
  • Dispersants, bleaching chemicals, cleaning agents, dyes, complexing agents and solubilizers which are specifically supplied to the process, contribute by enrichment in the circuits to an increase in the concentration of colloidally dissolved impurities directly or from the interaction with each other.
  • Other sources include extracts from the pulps, lignin and lignin derivatives,
  • the high loads can also lead to increased microbiological activity, for example in laid paper, as there are easily metabolizable substances among them.
  • Paper properties such as whiteness, opacity, color and strength are also affected by the presence of colloidal impurities.
  • the contaminants may also result in lowering the surface tension and thereby increased foam, which in turn leads to paper defects and breaks.
  • the accumulation of contaminants in the entire water cycle system depends on the amount of raw materials supplied, the process temperature, the
  • Extractability the water circulation rate, the amount discharged with the wastewater, the discharge of impurities with the paper produced and the supply of fresh water.
  • Aluminum sulfate to improve the retention and fixation of impurities at.
  • cationic polymers are increasingly used, but they are expensive and less effective than the aluminum sulfate.
  • the object of the invention is therefore to develop a method and a device for aiding the sizing and / or fixing of contaminants and / or increasing the retention in a pulp suspension by means of metal ions, which at least at neutral pH of the pulp suspension works.
  • the object with regard to the method has been achieved in that the fibrous suspension directly or indirectly supplied metal ions are at least predominantly produced electrolytically.
  • the metal ions are freshly dissolved and can so quickly for the purpose of sizing, Störstofffix réelle and / or
  • the electrolytic production of the metal ions takes place at least partially, preferably entirely, in the pulp suspension.
  • conductive salts should be present in the solvent.
  • the metal ions should be formed of iron, magnesium, cobalt, nickel, copper, zinc or titanium ions, but preferably aluminum ions ,
  • the preferred Al 3+ ion is particularly effective. Control of the electrolysis is relatively easy and is preferably done such that the electrolysis at constant voltage difference between the
  • Electrodes or at constant current The connection or disconnection of individual electrolysis reactors can be helpful here.
  • a device according to the invention is essential that the
  • Pulp suspension is passed into an electrolysis space in which are connected to a DC voltage source and coming into contact with the pulp suspension electrodes, wherein the anode has a metal surface.
  • the electrolysis space can be formed to simplify a Bütte, in particular a machine chest or a Mischbütte.
  • metal ions are not in the pulp suspension but in a
  • Solvent especially water to be produced, it should
  • Solvents are passed into an electrolysis room, in which connected to a DC voltage source and in contact with the solvent
  • White water container of a machine for producing a paper, cardboard, tissue or another fibrous web are formed.
  • the mixing chamber it may be advantageous if it is formed by a chest or the headbox of a machine for producing a paper, cardboard, tissue or another fibrous web.
  • the anode should have a surface of iron, magnesium, cobalt, nickel, copper, zinc or titanium, but preferably of aluminum.
  • the cathode consists of the same material as the anode. This allows a reversal of the current direction in the interest of uniform wear of the electrodes and to avoid the
  • FIG. 1 shows a schematic cross section through part of a paper machine with preceding stock preparation 4;
  • FIG. 2 shows a schematic cross section through an electrolysis chamber 3 and FIG. 3 shows an electrolysis at the headbox 8.
  • the electrolysis takes place in an electrolysis space 3 according to Figure 2, in which the pulp suspension 1 or fresh or white water 2 is passed.
  • the electrolysis space 3 there are two electrodes 12,13, each with a pole of a
  • the cathode 12 is formed for example by an inert diamond electrode, while the connected to the positive pole of the DC voltage source anode 13 is made of aluminum.
  • the amount of Al 3+ ions generated thereby can be controlled by voltage and / or current.
  • the current intensity or the voltage or the voltage difference is kept constant.
  • the conductivity may be increased to intensify the electrolysis by the addition of conductive salts. To reduce the consumption of metal ions by side reactions
  • the water 2 should be mixed with the metal ions as quickly as possible to the pulp suspension 1.
  • This mixing takes place in a mixing chamber 9, which can be formed by a chest 5,6, a white water tank 14, a mixing device in front of the headbox 8 or a headbox 8.
  • the Al 3+ ions are generated in this way close to the site of action, which significantly increases the efficiency.
  • the Al 3+ ions react with the existing, primarily anionic components, such as glue, impurities, fibers, fines and fillers. Since this is possible even at neutral pH, calcium carbonate can continue to be used as a filler.
  • the plant shown in Figure 1 for the production of a paper web begins with the stock preparation 4, in which the fresh or recovered paper fibers are dissolved and treated. From there, the pulp suspension 1 passes to a mixing chest 5, in which the mixing with water 2, but also with fillers and additives 15, such as fixing or sizing agents takes place. The mixing bin 5 is followed by a machine chest 6, from which the pulp suspension 1 passes into the constant part 7. In the constant part 7 of paper machines, the highly consistent accepts formed by the treated fibers and fillers with the in the
  • Paper machine collected collected white water 2 diluted and then fed to the headbox 8 of the paper machine.
  • the paper web is dried, possibly painted and smoothed, before it can be wound up.
  • Pulp suspension 1 in the stock preparation 4 or in the constant part 7 be present. It is also possible that the mixing 5, the machine chest 6 or the
  • Headbox 8 to form the electrolysis space 3. The same can be done independently
  • Electrolysis spaces 3 are arranged between these units.
  • Dilution supplied water 2 AI 3+ - should have ions, so the water 2 before feeding into the stock preparation 4 and / or in the mixing chest 5 and / or the machine chest 6 and / or the constant part 7 and / or the headbox 8 by a separate electrolysis space 3 are performed.
  • Pulp suspension 1 is then carried out in a mixing chamber 9, which is formed for the sake of simplicity of the Mischbütte 5, the machine chest 6 or the headbox 8.
  • a mixing chamber 9 which is formed for the sake of simplicity of the Mischbütte 5, the machine chest 6 or the headbox 8.
  • the white water tank 14 may itself act as an electrolysis space 3. However, that is It is also possible to supply the additional water 2 to the white water tank 14 via an electrolysis space 3.
  • the duration of action of the AI 3+ ions from generation to the headbox 8 is between a few seconds and a few minutes.
  • the duration of action is in the range of milliseconds.
  • Dilution water headbox as described for example in EP985762, EP 1 645 684 or DE 10 2004 049 261.
  • the headbox 8 At least the high-consistency stream and usually also a low-consistency stream via a transverse distributor 16 over the width of the
  • the high-consistency stream formed by the pulp suspension 1 and / or the low-consistency stream formed essentially by water 2 can be passed over an electrolysis space 3.
  • the mixing chamber 9 is in this case formed by the headbox 8 itself, in which both streams are mixed anyway.
  • the mixing chamber 9 can also be formed by a turbulence generator and / or by the turbulent flow zone directly after the turbulence generator of the headbox 8.

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  • Paper (AREA)

Abstract

L'invention concerne un procédé et des dispositifs correspondants, ayant pour but d'assister l'encollage et/ou de permettre la fixation de substances gênantes et/ou d'augmenter la rétention pour une suspension de matière fibreuse (1) au moyen d'ions métalliques. En vue d'atteindre ce but, indépendamment du pH de la suspension de matière fibreuse (1), les ions métalliques sont produits, au moins de manière prépondérante, par voie électrolytique.
PCT/EP2011/061086 2010-07-06 2011-07-01 Ions métalliques Ceased WO2012004196A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010030996.6 2010-07-06
DE201010030996 DE102010030996A1 (de) 2010-07-06 2010-07-06 Metall-Ionen

Publications (1)

Publication Number Publication Date
WO2012004196A1 true WO2012004196A1 (fr) 2012-01-12

Family

ID=44501640

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/061086 Ceased WO2012004196A1 (fr) 2010-07-06 2011-07-01 Ions métalliques

Country Status (2)

Country Link
DE (1) DE102010030996A1 (fr)
WO (1) WO2012004196A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012220771A1 (de) 2012-11-14 2014-05-15 Voith Patent Gmbh Misch-/ Dosiervorrichtung
DE102012223368A1 (de) 2012-12-17 2014-06-18 Voith Patent Gmbh Online-Detektieren von Aluminium-Ionen
DE102012223574A1 (de) 2012-12-18 2014-06-18 Voith Patent Gmbh Elektrolysevorrichtung und Verfahren zur Erzeugung von Aluminium-Ionen
DE102013225247A1 (de) 2013-12-09 2015-06-11 Voith Patent Gmbh Stoffaufbereitung
DE102014203794A1 (de) 2014-03-03 2015-03-26 Voith Patent Gmbh Entwässerungsverfahren

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191000132A (en) * 1910-01-03 1911-04-03 Fritz Arledter A Process for Electrically Sizing Paper.
WO1994012725A1 (fr) * 1992-11-25 1994-06-09 Helix, Inc. Traitement de la pate a papier
EP0666242A1 (fr) * 1994-02-03 1995-08-09 Eka Nobel Ab Traitement d'électrodialyse
EP0985762A1 (fr) 1998-09-03 2000-03-15 Voith Sulzer Papiertechnik Patent GmbH Caisse de tête pour la répartition d'une suspension fibreuse et des additifs
EP1645684A1 (fr) 2004-10-09 2006-04-12 Voith Paper Patent GmbH Procédé et dispositif pour réguler le profil transversal de grammage d'une bande fibreuse
WO2008076071A1 (fr) * 2006-12-21 2008-06-26 Akzo Nobel N.V. Procédé de production de produit cellulosique
WO2011018555A1 (fr) * 2009-08-14 2011-02-17 Hannu Suominen Procédé pour déshydrater une fibre et une suspension de particules dans la production de pâte à papier, de papier ou de carton

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191000132A (en) * 1910-01-03 1911-04-03 Fritz Arledter A Process for Electrically Sizing Paper.
WO1994012725A1 (fr) * 1992-11-25 1994-06-09 Helix, Inc. Traitement de la pate a papier
EP0666242A1 (fr) * 1994-02-03 1995-08-09 Eka Nobel Ab Traitement d'électrodialyse
EP0985762A1 (fr) 1998-09-03 2000-03-15 Voith Sulzer Papiertechnik Patent GmbH Caisse de tête pour la répartition d'une suspension fibreuse et des additifs
EP1645684A1 (fr) 2004-10-09 2006-04-12 Voith Paper Patent GmbH Procédé et dispositif pour réguler le profil transversal de grammage d'une bande fibreuse
DE102004049261A1 (de) 2004-10-09 2006-04-13 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Regelung des Flächengewichtsquerprofils einer Faserstoffbahn
WO2008076071A1 (fr) * 2006-12-21 2008-06-26 Akzo Nobel N.V. Procédé de production de produit cellulosique
WO2011018555A1 (fr) * 2009-08-14 2011-02-17 Hannu Suominen Procédé pour déshydrater une fibre et une suspension de particules dans la production de pâte à papier, de papier ou de carton

Also Published As

Publication number Publication date
DE102010030996A1 (de) 2012-01-12

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