EP2875183B1 - Installation de production de papier de sécurité - Google Patents

Installation de production de papier de sécurité Download PDF

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Publication number
EP2875183B1
EP2875183B1 EP13734777.9A EP13734777A EP2875183B1 EP 2875183 B1 EP2875183 B1 EP 2875183B1 EP 13734777 A EP13734777 A EP 13734777A EP 2875183 B1 EP2875183 B1 EP 2875183B1
Authority
EP
European Patent Office
Prior art keywords
standpipe
screen
forming unit
sheet forming
installation according
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.)
Not-in-force
Application number
EP13734777.9A
Other languages
German (de)
English (en)
Other versions
EP2875183A1 (fr
Inventor
Herbert Aust
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
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Voith Patent GmbH
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Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2875183A1 publication Critical patent/EP2875183A1/fr
Application granted granted Critical
Publication of EP2875183B1 publication Critical patent/EP2875183B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/04—Complete machines for making continuous webs of paper of the cylinder type
    • D21F9/043—Complete machines for making continuous webs of paper of the cylinder type with immersed cylinder

Definitions

  • the invention relates to a system for producing security paper from a pulp suspension containing safety fibers, which is guided by a sorter to a sheet forming unit with overflow.
  • the object of the invention is therefore to reduce the loss of security fibers with the least possible effort.
  • the object has been achieved in that the overflow of the sheet forming unit is passed into a standpipe, which is arranged between the sorter and the sheet forming unit and the security fibers of the pulp suspension are added only after the sorter. This ensures that at least the majority of the security fibers is not passed through the sorter, which already significantly reduces the loss of security fibers. If returns of the sheet forming unit are conducted in this standpipe, so For example, the security fibers not picked up from the paper can be completely kept in the circuit between the starlight tube and the sheet forming unit.
  • a pump should be arranged between the standpipe and the sheet forming unit.
  • the flow rate of the pulp suspension at the inlet of the pump should be between 1 and 1.5 m / s. Since this pump also provides additional turbulence and mixing, it is advantageous if the safety fibers of the pulp suspension between this standpipe and the pump are added.
  • the sorter should be the last sorter before the sheet forming unit. Compared to the prior art, the overflow and return of the sheet forming unit are no longer guided by the sorter, so that it can be made smaller and thus cheaper.
  • the invention is not limited thereto.
  • the rotating round screen partially dips into the pulp suspension, whereby liquid is sucked into the interior of the round screen. In this way comes from on the surface of the round screen to a densification of the pulp and ultimately to the formation of the paper web. After emergence of the round screen from the pulp suspension, the paper web can be led away from a removal belt from the round screen.
  • the sorter In order to ensure the required flow rate of the pulp suspension and thus the required throughput at the inlet of the pump
  • the sorter should be controlled according to the suspension level in the standpipe. To ensure the most constant possible conditions in the sheet formation, the sorter led to the standpipe amount of pulp suspension should be so large that adjusts an approximately constant suspension level in the standpipe.
  • the regulation of the suspension level in the standpipe can be considerably simplified if the cross section of the standpipe widens upwards from the outlet.
  • the most highly consistent pulp suspension should be diluted, which is preferably done with process water, which is abundant in the paper machine in the form of white water.
  • a further standpipe is arranged in front of the sorter, in which the highly consistent pulp suspension and the white water are passed.
  • a further pump should be arranged between the further standpipe and the sorter. This additional effort is more than offset by the smaller sorter and the avoidance of losses of safety fibers.
  • the coming from a, for example, equipped with hydrocyclones cleaning plant pulp suspension 1 is injected for dilution in a standpipe 9, in which also white water 10 is passed from a white water tank.
  • the white water 10 accumulates in the treatment of the pulp suspension 1, but also in the production of the paper web.
  • the diluted pulp suspension 1 passes from a pump 11 conveyed to a sorter 6, in which the contaminants are sorted out by means of a sieve with holes or slots. From this sorter 6 the accept is passed into a following standpipe 5, in which the pulp suspension 1 is mixed with the resulting in a downstream sheet forming unit 4 as overflow 3 and return 7 parts of the pulp suspension 1. From the bottom outlet of this open-topped standpipe 5, the pulp suspension 1 is then conveyed via a pump 8 to the sheet forming unit 4. In this case, the pulp suspension 1 between this standpipe 5 and this pump 8 colored or fluorescent security fibers with a length between 4 and 8 mm for the formation of security paper, such as banknotes or the like. attached. The following pump 8 ensures a sufficient mixing.
  • the sorter 6, i. whose passage is controlled so that the suspension level in the following standpipe 5 remains approximately constant.
  • the cross section in the standpipe 5 increases considerably from the outlet to the top.
  • the flow rate of the pulp suspension at the inlet of the pump 8 should be between 1 and 1.5 m / s. Accordingly, the standpipe 5 is to be dimensioned.
  • the sheet forming unit 4 is designed as a rotary screen system of known design.
  • the rotating, cylindrical circular sieve 12 with a horizontal axis of rotation partially dips into a container 13 with the pulp suspension 1.
  • the Liquid is sucked into the circular sieve 12 and guided as white water 10 in the white water tank.
  • the pulp densifies on the surface of the round wire 12, which leads to the formation of the paper web.
  • the formed paper web is available after emergence from the pulp suspension 1 and can be removed from an air-permeable removal belt 14 in the form of a sieve or felt from the round screen 12.

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  • Paper (AREA)

Claims (12)

  1. Installation de fabrication d'un papier sécurisé constitué d'une suspension (1) de matière fibreuse contenant des fibres de sécurité (2) et amenée par un diviseur (6) vers une unité (4) de formation de feuille dotée d'une surverse (3),
    caractérisée en ce que
    la surverse (3) de l'unité (4) de formation de feuille est guidée dans un tube vertical (5) disposé entre le diviseur (6) et l'unité (4) de formation de feuille, les fibres de sécurité (2) n'étant ajoutées à la suspension (1) de matière fibreuse qu'après le diviseur (6).
  2. Installation selon la revendication 1, caractérisée en ce que des retours (7) de l'unité (4) de formation de feuille sont également guidés dans le tube vertical (5).
  3. Installation selon les revendications 1 ou 2, caractérisée en ce qu'une pompe (8) est disposée entre le tube vertical (5) et l'unité (4) de formation de feuille.
  4. Installation selon l'une des revendications précédentes, caractérisée en ce que les fibres de sécurité (2) sont ajoutées à la suspension (1) de matière fibreuse entre le tube vertical (5) et la pompe (8).
  5. Installation selon l'une des revendications précédentes, caractérisée en ce que la section transversale du tube vertical (5) s'agrandit vers le haut.
  6. Installation selon l'une des revendications précédentes, caractérisée en ce que le diviseur (6) est le dernier diviseur (6) qui précède l'unité (4) de formation de feuille.
  7. Installation selon l'une des revendications précédentes, caractérisée en ce que l'unité (4) de formation de feuille est configurée comme installation à tamis rond.
  8. Installation selon l'une des revendications précédentes, caractérisée en ce qu'un autre tube vertical (9) dans lequel la suspension (1) de matière fibreuse et de l'eau de tamisage (10) sont guidées est disposé en amont du diviseur (6).
  9. Installation selon la revendication 8, caractérisée en ce qu'une autre pompe (11) est prévue entre l'autre tube vertical (9) et le diviseur (6).
  10. Procédé de conduite de l'installation selon l'une des revendications précédentes, caractérisé en ce que le diviseur (6) est commandé en fonction du niveau de la suspension dans le tube vertical (5) suivant.
  11. Procédé selon la revendication 10, caractérisé en ce que la quantité de suspension (1) de matière fibreuse amenée du diviseur (6) au tube vertical (5) suivant est suffisamment grande pour que s'établisse dans le tube vertical suivant (5) un niveau sensiblement constant de suspension.
  12. Procédé selon les revendications 10 ou 11, caractérisé en ce que la vitesse d'écoulement de la suspension (1) de matière fibreuse à l'entrée de la pompe (8) qui suit le diviseur (6) est comprise entre 1 et 1,5 m/s.
EP13734777.9A 2012-07-18 2013-07-09 Installation de production de papier de sécurité Not-in-force EP2875183B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201210212529 DE102012212529A1 (de) 2012-07-18 2012-07-18 Sicherheitspapier-Konstantteil
PCT/EP2013/064421 WO2014012814A1 (fr) 2012-07-18 2013-07-09 Système d'arrivée de pâte pour papier de sécurité

Publications (2)

Publication Number Publication Date
EP2875183A1 EP2875183A1 (fr) 2015-05-27
EP2875183B1 true EP2875183B1 (fr) 2016-04-06

Family

ID=48748249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13734777.9A Not-in-force EP2875183B1 (fr) 2012-07-18 2013-07-09 Installation de production de papier de sécurité

Country Status (4)

Country Link
EP (1) EP2875183B1 (fr)
CN (1) CN104520503A (fr)
DE (1) DE102012212529A1 (fr)
WO (1) WO2014012814A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2010292310B2 (en) 2009-09-08 2017-01-12 The Ohio State University Research Foundation Synthetic fuels and chemicals production with in-situ CO2 capture
BE1022912B1 (nl) * 2015-06-29 2016-10-13 Eternit Nv Een methode voor het regelen van het vloeistofniveau in de premixing unit van een hatschekmachine
DE102019111122A1 (de) * 2019-04-30 2020-11-05 Voith Patent Gmbh Injektordüse

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2412771A (en) * 1938-09-27 1946-12-17 Philip H Goldsmith Method of making paper on cylinder mold type paper machines
FR1583312A (fr) * 1968-08-21 1969-10-24
US4146425A (en) * 1974-10-02 1979-03-27 Sulzer Brothers Limited Papermaking machine headbox having a feed channel and an adjacent overflow sump
ES2060488B1 (es) * 1991-11-28 1995-12-16 Nacional Moneda Timbre Instalacion para la fabricacion de documentos de seguridad y documentos de seguridad obtenidos con dicha instalacion.
DE19859770A1 (de) * 1998-06-29 1999-12-30 Voith Sulzer Papiertech Patent Verfahren und Vorrichtung zum Mischen von Sroffsuspension
EP0969142B1 (fr) * 1998-06-29 2004-03-24 Voith Paper Patent GmbH Procédé et dispositif pour mélanger des suspensions de pâte à papier
DE10050109A1 (de) * 2000-10-09 2002-04-11 Voith Paper Patent Gmbh Verfahren und Mischvorrichtung zur Erzeugung einer fertigen Faserstoffsuspension
CH696744A5 (de) * 2003-07-07 2007-11-15 Landqart Sicherheitspapier und Verfahren zu dessen Herstellung.
EP1707671B1 (fr) * 2003-12-23 2012-03-28 Federal State Unitary Enterprise "Goznak" Procede de fabrication de papier pour valeurs protege contre la contrefacon et papier pour valeurs obtenu par ce procede (et variantes)
DE102004051327B4 (de) * 2004-10-21 2007-09-27 Voith Patent Gmbh Verfahren zur Entgasung und Zuführung einer Faserstoffsuspension zu einem Stoffauflauf sowie Entgasungsvorrichtung
GB0514327D0 (en) * 2005-07-13 2005-08-17 Harris Colin A Producing security paper
DE102009010037A1 (de) * 2009-02-21 2010-08-26 Voith Patent Gmbh Anordnung zur Druckreduzierung
DE102009020949A1 (de) * 2009-05-12 2010-11-18 Voith Patent Gmbh Konstantteil
CN102505567A (zh) * 2011-10-26 2012-06-20 山东凯丽特种纸股份有限公司 一种带有安全条块的防伪纸及生产方法

Also Published As

Publication number Publication date
EP2875183A1 (fr) 2015-05-27
WO2014012814A1 (fr) 2014-01-23
DE102012212529A1 (de) 2014-01-23
CN104520503A (zh) 2015-04-15

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