EP2179086A1 - Partie constante pour une machine à papier - Google Patents

Partie constante pour une machine à papier

Info

Publication number
EP2179086A1
EP2179086A1 EP08786203A EP08786203A EP2179086A1 EP 2179086 A1 EP2179086 A1 EP 2179086A1 EP 08786203 A EP08786203 A EP 08786203A EP 08786203 A EP08786203 A EP 08786203A EP 2179086 A1 EP2179086 A1 EP 2179086A1
Authority
EP
European Patent Office
Prior art keywords
consistency
consistency stream
stream
low
headbox
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Withdrawn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
EP08786203A
Other languages
German (de)
English (en)
Inventor
Karl-Heinz Beuermann
Erwin Binder
Klaus Lehleiter
Markus Häußler
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 EP2179086A1 publication Critical patent/EP2179086A1/fr
Withdrawn legal-status Critical Current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
    • D21F1/08—Regulating consistency

Definitions

  • the invention relates to a method for producing a finished pulp suspension for producing a paper, board, tissue or another fibrous web by mixing at least one, made of recycled fiber and filler high consistency flow with at least one of fresh water, white water o.a. formed low-consistency stream in a machine for producing the fibrous web.
  • the invention also relates to an arrangement for producing a finished pulp suspension for producing a paper, board, tissue or another fibrous web from at least one, formed by newly processed fiber and filler high-consistency stream and at least one, preferably fresh water, white water o.a. formed low-consistency stream in the constant part of a machine for producing the fibrous web, wherein at least the high-consistency stream is passed through a cleaning device, in particular for carrying out the method.
  • the highly consistent accept is diluted with the white water collected in the paper machine and then fed to the headbox. Before the headbox, however, the pulp suspension must at least be cleaned. This is relatively expensive and requires a lot of space.
  • the object of the invention is therefore to reduce the effort and the space required for the constant part.
  • the object was achieved with regard to the method in that at least the high-consistency stream is cleaned and at least part of the low-consistency stream is added to it only after the high-consistency stream has been cleaned. Since the dilution of the high-consistency stream takes place only after the cleaning, the cleaning device can be designed for a correspondingly lower throughput. This also applies to any existing, more of the high-consistency stream before dilution passed devices, such as degassing.
  • cleaning devices such as cleaners or sorters are often suitable for relatively high consistency streams without taking advantage of this potential.
  • the high-consistency stream after the cleaning device is led to a mixing device with at least part of the low-consistency stream.
  • the consistency of the high-consistency stream required for the headbox should already be achieved. This allows the high consistency stream to be fed directly to a head box of the machine after admixing in the mixing device.
  • the high-consistency stream is passed through a degassing device before admixing and the content of free air is reduced to less than 1, in particular less than 0.6,% by volume in the head box.
  • the admixed low-consistency stream is cleaned before admixing by a cleaning device and / or degassed via a degassing device.
  • the respective cleaning device of the streams should comprise at least at least one sorter and / or cleaner.
  • the admixing takes place via an injection of the low consistency stream, wherein the inlet velocity of the low consistency stream should preferably be 3 to 15 times the flow velocity of the high consistency stream.
  • the maximum consistency depends on the freeness and / or the filler content of the high consistency stream. A lower degree of grinding and / or a low filler content are associated with a lower maximum consistency. - A -
  • the consistency of the high consistency flow should prior to the admixture at a freeness of the pulp suspension below 50 0 SR, preferably less than 35 ° SR at least 0.6%, in particular at least 1, be 2%.
  • the advantages of a high consistency are particularly clear when the consistency of the high consistency stream prior to blending is at least 1.2%, preferably at least 1.6% and especially at least 2.1% and at most 4%, preferably at most 3.5%.
  • the stock consistency of the high consistency stream in% before admixture should be greater than 0.025 times the freeness measured in 0 SR minus 0.2 and less than 0.04 times the freeness measured in 0 SR plus 0 Be 8.
  • the high-consistency stream is not diluted further after the admixture or else a further part of the low-consistency stream is fed into a headbox of the machine and mixed with the high-consistency stream.
  • Figure 1 a schematic representation of the constant part of a paper machine and Figure 2: another constant part.
  • the high-consistency stream 1 is prepared in a manner known per se from fibrous materials and fillers in accordance with the specifications of the papermaker, i. in predetermined mixing ratios in a mixing chest 5 merged and mixed.
  • the paper machine begins with the headbox 3 and the adjoining former 11 to form the fibrous web 9.
  • the finished pulp suspension is applied via one or more nozzles of the headbox 3 on the Formersieb 10.
  • the white water is collected and returned to the constant part.
  • the use of white water to form the low-consistency stream 2 is not only associated with savings compared to the use of fresh water, but it can also be reused in the white water contained fiber and fillers.
  • the high-consistency stream 1 coming from the mixing chest 5 is diluted, as shown in FIG. 1, in a mixing device 8 with a part of the low-consistency stream.
  • the consistency of the high consistency stream 1 is after this dilution between 1, 6 and 4%, preferably between 2.1 and 3.5%.
  • the relatively high consistency significantly reduces the expense of cleaning and degassing due to the lower throughput.
  • the high-consistency stream 1 is passed through a first cleaning device 4 in the form of a cleaner, a degassing device 6 and a cleaning device 4 in the form of a sorter.
  • a first cleaning device 4 in the form of a cleaner
  • a degassing device 6 and a cleaning device 4 in the form of a sorter.
  • the cleaner and the degassing device 6 can also be dispensed with.
  • headboxes are particularly suitable in which streams of different consistency are mixed to regulate the basis weight transverse profile, as described, for example, in EP 1 645 684.
  • the supply of at least one stream 1, 2 should be regulated for Basisthesquerprofiltechnik the fibrous web 9.
  • the part of the low-consistency part 2 supplied to the mixing device 7 and the headbox 3 is guided by a degassing device 6 and a cleaning device 4 in the form of a sorter.
  • the white water is brought to boiling under reduced pressure. In this case, even slight impurities can be eliminated.

Landscapes

  • Paper (AREA)

Abstract

L'invention concerne un procédé et un dispositif de production d'une suspension finie de matière fibreuse pour la fabrication d'une bande (9) de papier, de carton, de tissu ou autre matière fibreuse, par mélange d'au moins un flux à haute consistance (1), formé de matières fibreuses et de charges nouvellement préparées, avec au moins un flux à basse consistance (2), formé d'eau fraîche, d'eau de retour ou analogue, dans une machine de fabrication de la bande (9) de matière fibreuse. L'objectif de l'invention est de réduire la complexité du procédé. A cet effet, au moins le flux à haute consistance (1) est épuré et au moins une partie du flux à basse consistance (2) n'est mélangée au flux à haute consistance (1) qu'après l'épuration de ce dernier.
EP08786203A 2007-08-11 2008-07-17 Partie constante pour une machine à papier Withdrawn EP2179086A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710038090 DE102007038090A1 (de) 2007-08-11 2007-08-11 Konstantteil IV
PCT/EP2008/059364 WO2009021804A1 (fr) 2007-08-11 2008-07-17 Partie constante pour une machine à papier

Publications (1)

Publication Number Publication Date
EP2179086A1 true EP2179086A1 (fr) 2010-04-28

Family

ID=39767095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08786203A Withdrawn EP2179086A1 (fr) 2007-08-11 2008-07-17 Partie constante pour une machine à papier

Country Status (5)

Country Link
EP (1) EP2179086A1 (fr)
CN (1) CN101784724A (fr)
BR (1) BRPI0813620B1 (fr)
DE (1) DE102007038090A1 (fr)
WO (1) WO2009021804A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010038694A1 (de) * 2010-07-30 2012-02-02 Voith Patent Gmbh Konstantteil

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI103676B (fi) * 1998-06-10 1999-08-13 Metso Paper Inc Paperi- tai kartonkikoneen lyhyen kierron prosessijärjestely
DE10017037A1 (de) 2000-04-05 2001-10-11 Voith Paper Patent Gmbh Vorrichtung zum Entgasen von Faserstoffsuspension
DE10050109A1 (de) 2000-10-09 2002-04-11 Voith Paper Patent Gmbh Verfahren und Mischvorrichtung zur Erzeugung einer fertigen Faserstoffsuspension
FI109300B (fi) * 2001-05-29 2002-06-28 Metso Paper Inc Paperi- tai kartonkikoneen massan syöttöjärjestely
FI111967B (fi) * 2002-05-02 2003-10-15 Metso Paper Inc Prosessijärjestely paperikoneen lyhyessä kierrossa
DE102004049261A1 (de) 2004-10-09 2006-04-13 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Regelung des Flächengewichtsquerprofils einer Faserstoffbahn

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009021804A1 *

Also Published As

Publication number Publication date
CN101784724A (zh) 2010-07-21
DE102007038090A1 (de) 2009-02-12
BRPI0813620B1 (pt) 2018-07-10
WO2009021804A1 (fr) 2009-02-19
BRPI0813620A2 (pt) 2015-12-15

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