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EP1792008A1 - Procede et dispositif de charge d'une suspension de matiere fibreuse - Google Patents

Procede et dispositif de charge d'une suspension de matiere fibreuse

Info

Publication number
EP1792008A1
EP1792008A1 EP05771522A EP05771522A EP1792008A1 EP 1792008 A1 EP1792008 A1 EP 1792008A1 EP 05771522 A EP05771522 A EP 05771522A EP 05771522 A EP05771522 A EP 05771522A EP 1792008 A1 EP1792008 A1 EP 1792008A1
Authority
EP
European Patent Office
Prior art keywords
pulp
pressure vessel
carbon dioxide
suspension
calcium hydroxide
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Withdrawn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
EP05771522A
Other languages
German (de)
English (en)
Inventor
Klaus Doelle
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 EP1792008A1 publication Critical patent/EP1792008A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/675—Oxides, hydroxides or carbonates
    • 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
    • D21H17/70—Inorganic compounds forming new compounds in situ, e.g. within the pulp or paper, by chemical reaction with other substances added separately
    • 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
    • D21H21/50—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 characterised by form
    • D21H21/52—Additives of definite length or shape
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/04—Addition to the pulp; After-treatment of added substances in the pulp

Definitions

  • the invention relates to a method for loading a pulp suspension with calcium carbonate.
  • No. 6,413,365 B1 describes a process in which fiber material is transported via a feed line together with calcium oxide and / or calcium hydroxide present in the suspension. From this, the pulp suspension is forwarded to a rotating distribution device. Carbon dioxide is introduced annularly into the pulp suspension as the reaction gas; As a result, calcium carbonate crystals are formed in the pulp suspension. About the rotating distributor, the calcium carbonate crystals are distributed in the pulp suspension. This process is referred to as a fiber loading process.
  • DIP deinked paper
  • secondary pulp bleached or unbleached pulp
  • mechanical pulp bleached or unbleached sulphate pulp
  • pulp cotton
  • hemp fibers predominantly cigarette paper
  • Activation means that existing filler particles are superimposed by the fiber loading process or serve as nucleation nuclei, resulting in better optical properties.
  • the method is also suitable when using Flexolnk (water-based ink) printed paper, especially newsprint, for the recovery of the fiber raw material is used.
  • Flexolnk water-based ink
  • the pressure particles consisting of Flexolnk can not or only with difficulty be separated by a flotation process.
  • the process is independent of whether the fiber raw material contains filler which has been produced by a precipitation process in batch reactors or by a milling process, or whether talc, titanium dioxide (TiO 2 ), silicon, etc. are used.
  • the fiber-loading technology allows filler, in particular calcium carbonate, to precipitate directly in the stock preparation of a paper mill, which filler material is evenly distributed and deposited on, in and between the paper fibers.
  • the field of application of the fiber-loading process technology-produced filler extends to the fields of application of papermaking all types of paper including cigarette paper types, types of filter paper, types of sack kraft paper and paperboard and packaging paper, including those using recycled paper grades and DIP papers ,
  • Such packaging papers may have a filler content between 1 and 60% and / or have a white topcoat with a filler content between 1 and 60%.
  • the loaded and produced types of paper may be made of recycled paper, deinked paper (DIP), secondary pulp, bleached or unbleached pulp, wood pulp, bleached or bleached sulphate pulp, pulp, cotton, and / or hemp fibers (mainly for cigarette paper) and / or any paper raw material are produced on a paper machine, regardless of whether the end product contains filler.
  • DIP deinked paper
  • secondary pulp bleached or unbleached pulp
  • wood pulp bleached or bleached sulphate pulp
  • pulp cotton, and / or hemp fibers (mainly for cigarette paper)
  • hemp fibers mainly for cigarette paper
  • Pulp produced using fiber-loading combination process technology generally has a higher dewatering capability than pulp produced by other methods;
  • the drainage capacity is 5 to 100 ml of CSF or 0.2 to 15 0 SR depending on the required freeness.
  • the fabric dries faster as well.
  • the optical properties of the paper suspension and of the raw material can be improved by 0.5 to 30 brightness points, preferably by 1 to 25 brightness points, mainly by the masking of impurities such as color particles or dirt.
  • aqueous fiber raw material in particular aqueous paper stock, having a consistency of between 1 and 20% of pulp fraction is introduced into the pressure vessel, wherein at one
  • the aqueous fiber raw material is diluted with dilution water to a pulp suspension having a consistency of between 0.1 and 20%, in particular with a consistency of between 2 and 18%, diluted.
  • the pressure vessel is closed after introduction of the aqueous fibrous material and / or the dilution water through a sluice.
  • the calcium hydroxide or the calcium oxide is mixed into the aqueous pulp in a range between 0.1 and 60% of the solids content of the mass of the dry pulp present.
  • the pH is preferably between 6 and 11, in particular between 6.5 and 10.5.
  • the reaction time is between 0.0005 and 30 minutes, especially in the range between 0.05 to 10 minutes.
  • the calcium carbonate can be precipitated by mixing in the carbon dioxide in a pressure range between 0 and 15 bar, in particular between 0 and 6 bar.
  • the Faserstoff ⁇ suspension and / or carbon dioxide by process water or VerPnungs ⁇ water or water vapor during its dissolution in the pulp suspension or by the fiber loading process or by supplying heat energy from the outside, in particular by steam energy or electrical energy , is heated.
  • the carbon dioxide may be supplied before, during or after the addition of the carbon dioxide or the calcium hydroxide or the calcium oxide.
  • the pressure vessel can be closed by a valve or a lock before the reaction of the fiber load and opened after the reaction.
  • the energy required for the precipitation of the loaded fibers is between 0.3 and 8 kWh / t, in particular between 0.5 and 4 kWh / t, if no device for grinding the pulp is used.
  • a grinding machine can also be connected upstream of the container if the fiber pulp is already sufficiently dissolved.
  • the grinding machine can also be connected downstream of the pressure vessel in an alternative embodiment of the invention.
  • the process temperature is between -15 and 120 0 C, in particular between 20 and 90 0 C.
  • the fiber loading process produces rhombohedral, scalenohedral, and spherical crystals.
  • Crystals with dimensions between 0.05 and 5 ⁇ m, in particular between 0.3 and 2.5 ⁇ m, can preferably be produced by this method.
  • the process is carried out in a pressure range between 0 and 15 bar, in particular between 0 and 6 bar.
  • the invention also relates to a device for carrying out the method.
  • the device is characterized in that it comprises a feed device for feeding fiber raw material and a pressure vessel.
  • the pressure vessel comprises a lock or a valve, via which the fiber or raw material for producing the pulp suspension with loaded fibers is supplied.
  • the pressure vessel has inlets for diluting or pressing water, for calcium oxide or calcium hydroxide and for carbon dioxide.
  • the pressure vessel comprises a rotor for mixing the fibrous suspension.
  • the invention will be described in detail in an embodiment with reference to the ein ⁇ zigen figure. This shows a schematic view of a Vor ⁇ direction for loading a pulp suspension.
  • a fiber raw material is fed to a pressure vessel 2 via an inlet pipe 1 (FIG.
  • a lock 3 is present between the inlet pipe 1 and the pressure vessel 2, which is opened and closed by a motor-operated shutter mechanism.
  • Dilution water, calcium hydroxide in liquid or solid form or calcium oxide or chemicals are supplied via further supply connections 4, 5, 6, so that, when the fiber raw material was first fed, until it reaches a filling level 7, above this level 7 forms a filling of the pressure vessel 2 with the serving for the pulp loading calcium hydroxide together with the water and / or the diluting water in which it is dissolved forms.
  • a rotor 8 is used, which has either at the bottom of the Druckbe ⁇ container 2 and / or further above a propeller or the like.
  • the rotor 8 is driven by a motor 9.
  • At least one inlet 10 for carbon dioxide is present in the lower region of the pressure vessel 2, through which the calcium hydroxide reacts to Calciumcar ⁇ carbonate. After the pulp is dissolved and loaded with calcium carbonate, it is discharged via a discharge pipe 12 provided with a valve 11 to a machine for producing a fibrous web.
  • At the pressure vessel 2 is preferably also a measuring point 13 for measuring the chemical composition of the contents of the pressure vessel 2, in particular for measuring the pH, arranged.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

Procédé de charge d'une suspension de matière fibreuse sous forme de fibres de cellulose à l'aide de carbonate de calcium, qui consiste à introduire de l'hydroxyde de calcium sous forme liquide ou sèche ou de l'oxyde de calcium dans la suspension de matière fibreuse, à introduire du dioxyde de carbone dans la suspension de matière fibreuse et à faire précipiter du carbonate de calcium, par le dioxyde de carbone, à partir de l'hydroxyde de calcium dans une cuve (2) sous pression.
EP05771522A 2004-09-17 2005-08-16 Procede et dispositif de charge d'une suspension de matiere fibreuse Withdrawn EP1792008A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004045089A DE102004045089A1 (de) 2004-09-17 2004-09-17 Verfahren und Vorrichtung zum Beladen einer Faserstoffsuspension
PCT/EP2005/008851 WO2006032333A1 (fr) 2004-09-17 2005-08-16 Procede et dispositif de charge d'une suspension de matiere fibreuse

Publications (1)

Publication Number Publication Date
EP1792008A1 true EP1792008A1 (fr) 2007-06-06

Family

ID=34979775

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05771522A Withdrawn EP1792008A1 (fr) 2004-09-17 2005-08-16 Procede et dispositif de charge d'une suspension de matiere fibreuse

Country Status (7)

Country Link
US (1) US20070151681A1 (fr)
EP (1) EP1792008A1 (fr)
CN (1) CN101014740A (fr)
BR (1) BRPI0514926A (fr)
CA (1) CA2580697A1 (fr)
DE (1) DE102004045089A1 (fr)
WO (1) WO2006032333A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006011539A1 (de) * 2006-03-14 2007-09-20 Voith Patent Gmbh Verfahren zum Beladen von in einer Faserstoffsuspension enthaltenen Fasern mit Füllstoff
DE102007007295A1 (de) * 2007-02-14 2008-08-21 Voith Patent Gmbh Verfahren zum Bilden von Füllstoffen, insbesondere Calciumcarbonat in einer Faserstoffsuspension
DE102007051665A1 (de) * 2007-10-30 2009-05-07 Voith Patent Gmbh Verfahren zur Bildung von Calciumcarbonat in einer Faserstoffsuspension
DE102007051664A1 (de) * 2007-10-30 2009-05-07 Voith Patent Gmbh Verfahren zur Bildung von Calciumcarbonat in einer Faserstoffsuspension II
DE102007057846A1 (de) 2007-11-30 2009-06-04 Voith Patent Gmbh Verfahren zur Entfernung von Farbpartikeln, insbsondere Druckfarbenpartikel aus einem Faserstoff
DE102008000047A1 (de) 2008-01-14 2009-07-16 Voith Patent Gmbh Verfahren zur Erhöhung des Weißgrades einer füllstoffhaltigen Fasersuspension
US8808503B2 (en) * 2009-02-02 2014-08-19 John Klungness Fiber loading improvements in papermaking
FI122304B (fi) * 2010-04-22 2011-11-30 Nordkalk Oy Ab Happaman veden käyttö paperinvalmistuksessa
FI125826B (fi) * 2010-08-04 2016-02-29 Nordkalk Oy Ab Menetelmä paperin tai kartongin valmistamiseksi
FI125278B (fi) * 2010-08-20 2015-08-14 Upm Kymmene Corp Menetelmä kalsiumkarbonaatin saostamiseksi sekä menetelmän käyttö
FI20125818A7 (fi) * 2012-07-27 2014-01-28 Upm Kymmene Corp Menetelmä ja järjestelmä kalanterin tummumisen estämiseksi
SE538770C2 (sv) 2014-05-08 2016-11-15 Stora Enso Oyj Förfarande för framställning av ett termoplastiskt fiberkompositmaterial och en väv
US10519607B2 (en) 2016-05-23 2019-12-31 Gpcp Ip Holdings Llc Dissolved air de-bonding of a tissue sheet
WO2018140252A1 (fr) * 2017-01-26 2018-08-02 Kimberly-Clark Worldwide, Inc. Fibres traitées et structures fibreuses les comprenant
DE102020108071A1 (de) * 2020-03-24 2021-09-30 Delfortgroup Ag Umhüllungspapier für Rauchartikel mit verbessertem Aschebild

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US3833464A (en) * 1973-02-16 1974-09-03 Owens Illinois Inc Method of decolorizing paper mill effluent liquid
US5096539A (en) * 1989-07-24 1992-03-17 The Board Of Regents Of The University Of Washington Cell wall loading of never-dried pulp fibers
US5223090A (en) * 1991-03-06 1993-06-29 The United States Of America As Represented By The Secretary Of Agriculture Method for fiber loading a chemical compound
US5674360A (en) * 1995-06-01 1997-10-07 International Paper Company Method and apparatus for steam packing/presteaming a batch digester
FI100729B (fi) * 1995-06-29 1998-02-13 Metsae Serla Oy Paperinvalmistuksessa käytettävä täyteaine ja menetelmä täyteaineen va lmistamiseksi
FI100670B (fi) * 1996-02-20 1998-01-30 Metsae Serla Oy Menetelmä täyteaineen lisäämiseksi selluloosakuituperäiseen massaan
US6503466B1 (en) * 1998-08-06 2003-01-07 Voith Sulzer Paper Technology North America, Inc. Apparatus and method for chemically loading fibers in a fiber suspension
US6251356B1 (en) * 1999-07-21 2001-06-26 G. R. International, Inc. High speed manufacturing process for precipitated calcium carbonate employing sequential perssure carbonation
US6533895B1 (en) * 2000-02-24 2003-03-18 Voith Sulzer Paper Technology North America, Inc. Apparatus and method for chemically loading fibers in a fiber suspension
US6355138B1 (en) * 2000-02-24 2002-03-12 Voith Sulzer Paper Technology North America, Inc. Method of chemically loading fibers in a fiber suspension
EP1158088A3 (fr) * 2000-05-26 2003-01-22 Voith Paper Patent GmbH Procédé et dispositif pour le traitement de suspensions fibreuses
DE10033979A1 (de) * 2000-07-13 2002-01-24 Voith Paper Patent Gmbh Verfahren zum Beladen von Fasern mit Calciumcarbonat
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US6458241B1 (en) * 2001-01-08 2002-10-01 Voith Paper, Inc. Apparatus for chemically loading fibers in a fiber suspension
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Also Published As

Publication number Publication date
US20070151681A1 (en) 2007-07-05
WO2006032333A1 (fr) 2006-03-30
DE102004045089A1 (de) 2006-03-23
CA2580697A1 (fr) 2006-03-30
BRPI0514926A (pt) 2008-07-01
CN101014740A (zh) 2007-08-08

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