EP1884592A1 - Procédé destiné à l'introduction d'une suspension fibreuse dans une caisse de tête d'une machine à papier - Google Patents

Procédé destiné à l'introduction d'une suspension fibreuse dans une caisse de tête d'une machine à papier Download PDF

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Publication number
EP1884592A1
EP1884592A1 EP07013237A EP07013237A EP1884592A1 EP 1884592 A1 EP1884592 A1 EP 1884592A1 EP 07013237 A EP07013237 A EP 07013237A EP 07013237 A EP07013237 A EP 07013237A EP 1884592 A1 EP1884592 A1 EP 1884592A1
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EP
European Patent Office
Prior art keywords
headbox
suspension
pulp suspension
paper machine
dilution
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Withdrawn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
EP07013237A
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German (de)
English (en)
Inventor
Erwin Binder
Johannes Ecker
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 EP1884592A1 publication Critical patent/EP1884592A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • D21F1/06—Regulating pulp flow
    • 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

Definitions

  • the invention relates to a method for feeding a pulp suspension according to the preamble of claim 1.
  • Such methods are used to feed pulp suspension paper machines.
  • the required Stoffzu brieflysysteme are basically known. The requirements of these methods are high, in particular, a constant volume flow with strictly prescribed composition should be fed smoothly to the paper machine.
  • the pulp suspension to be supplied receives most of the fibers from a thick stock suspension provided in the stock preparation plant.
  • the latter has e.g. a typical consistency between-2.5 and 5%.
  • dilution liquid e.g. White water of the paper machine
  • the consistency is lowered to a value that is favorable for the operation of the headbox of the paper machine.
  • This white water is optimally suited for this dilution task, but it can give problems because of the high gas content (mainly air). The largest amount of these gases escapes very quickly.
  • the invention is based on the object to provide methods of the type mentioned above, with which a stream is passed to the headbox and in spite of reduced volume of the guided in the system pulp suspension, a high quality of the paper produced from the pulp suspension can be achieved.
  • FIG. 1 shows a first example for carrying out the method according to the invention.
  • a pulp 16 which was produced as an aqueous suspension in the stock preparation plant (not shown), is mixed in a mixing device 15 with additives 17 which serve to improve the quality of the paper produced later.
  • Another material supplement comes from the fiber recovery 29, which is often used to clarify wastewater containing fibers, fines and fillers.
  • the recovered fiber thick stock 30 of the fiber recovery 29 is fed here into the mixing device 15.
  • the mixing device 15 opens into a mixing chest 18, from which the suspension is conveyed with a fuel pump 19 into the machine chest 20.
  • the machine chest 20 forms a supply in order to operate the paper machine 2 without interruption continuously.
  • the thick stock suspension 4 passes into a mixing device, which is advantageously a mixing tube 8, the so-called Hydromix of the Applicant is, for example, in the DE 100 05 694 A1 is described.
  • the fibrous suspension S thus formed is then produced in the usual manner by mixing the thick stock suspension 4 with a diluting liquid 5 and thereafter has substantially the consistency desired for the operation of the headbox 1 of the paper machine 2 at this point. It is known that headbox consistencies range between 0.5 and 2%, usually around 1%.
  • the relatively large volume flow of the dilution liquid 5 individual components (return streams) and the thick stock suspension 4 can be mixed in each provided ports.
  • the dilution liquid 5 originates from the first white water 12, that is, the water accumulated in the forming area of the paper machine 2 in the first white water channel 28. It is often referred to as Siebciesser I (SWI), in contrast to the later occurring on the paper machine white water 13, which contains much less fines.
  • the amount of the stock suspension 1 supplied pulp suspension S is controlled, for example by the speed of the headbox pump 9 is adjusted using a flow rate measurement 40 before the headbox 1.
  • the remainder of remaining specks and contaminants is excreted by a sorting system 6.
  • this sorting system 6 consists of one or more pressure sorters operated in parallel, such as one shown by way of example in FIG. 2.
  • the rejected on the screen 35 can be partially returned as a reject flow 7 in the mixing tube 8. Another part of the reject is discarded.
  • Gas-containing liquid 25 (suspension) removed from the top of the pressure sorter can be returned to the white water channel 28 of the paper machine 2, where the air escapes and the solid is reusable.
  • Modern headboxes 1 are often equipped with a dilution water metering 3 (so-called module jet), which makes it possible to selectively add a dilution liquid at certain points, viewed transversely to the machine direction.
  • a partial stream 22 is branched off from the dilution water treated in the degassing apparatus 11 in the system described here. This is preferably freed again from possibly remaining residual contaminant particles via a pressure sorter 23 and then fed as dilution water 27 into the dilution water metering 3 of the headbox 1.
  • the pressure sorter 23 used in the dilution water stream can also discharge both a reject stream 26 (overflow) and a gas-containing liquid 24, which for example are also introduced into the white water channel 28 of the paper machine 2.
  • the pressure sorter 23 shown schematically in FIG. 2 is of a type which is particularly well suited for carrying out the method; in particular, it can also be used for the sorting installation 6.
  • the pressure sorter is provided with a rotationally symmetrical, in particular cylindrical screen basket 35 through which the inflowing suspension can flow radially from the inside out, unless they are on the screen basket 35 is rejected.
  • the blockage of the screen basket 35 is prevented in a conventional manner by a rotating Siebmaschiner 36.
  • the top lid of such a sorter preferably operated with a vertical center line, is centrally located the outlet 33 for light materials and gases.
  • a gas-containing liquid is withdrawn at this outlet 33. In a later process, gas and liquid are separated.
  • the above-mentioned degassing apparatus 11 may preferably be constructed as shown in FIG. 3, namely with a front-side open drum-shaped rotatably driven rotor 38, inside which the liquid to be degassed, e.g. the white water 12 is introduced from the paper machine.
  • the central tube 37 serves this purpose.
  • an air core is formed in the middle of this apparatus.
  • a vacuum generating device 39 the gases 14 can be withdrawn from this air core.
  • This degasser is operated continuously, i. Means are used to continuously supply and remove the liquid. Overall, it is much less expensive than e.g. a common under vacuum standing large degassing tank (deculator).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
EP07013237A 2006-08-02 2007-07-06 Procédé destiné à l'introduction d'une suspension fibreuse dans une caisse de tête d'une machine à papier Withdrawn EP1884592A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610036018 DE102006036018B3 (de) 2006-08-02 2006-08-02 Verfahren zur Zuführung einer Faserstoffsuspension zu einem Stoffauflauf einer Papiermaschine

Publications (1)

Publication Number Publication Date
EP1884592A1 true EP1884592A1 (fr) 2008-02-06

Family

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Family Applications (1)

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EP07013237A Withdrawn EP1884592A1 (fr) 2006-08-02 2007-07-06 Procédé destiné à l'introduction d'une suspension fibreuse dans une caisse de tête d'une machine à papier

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EP (1) EP1884592A1 (fr)
DE (1) DE102006036018B3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009021805A1 (fr) * 2007-08-11 2009-02-19 Voith Patent Gmbh Dispositif de régulation de consistance pour une machine à papier
CN102282313A (zh) * 2008-12-12 2011-12-14 沃依特专利有限责任公司 上浆系统-筛分装置
ITFI20120154A1 (it) * 2012-07-25 2014-01-26 Toscotec S P A Impianto per la produzione di materiale cellulosico tramite una sospensione acquosa di fibre
US10995454B2 (en) * 2013-12-19 2021-05-04 3M Innovative Properties Company Using recycled waste water to make nonwoven fibrous materials suitable for use in a pollution control device or in a firestop
CN114108353A (zh) * 2021-12-10 2022-03-01 安德里茨（中国）有限公司 筛选系统
CN115787336A (zh) * 2022-12-09 2023-03-14 安德里茨（中国）有限公司 用于造纸备浆线的混浆槽装置以及造纸备浆线

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009018662U1 (de) * 2009-05-12 2012-07-16 Voith Patent Gmbh Konstantteil
EP2443069B1 (fr) 2009-06-15 2014-08-06 MERI Environmental Solutions GmbH Installation et procédé de traitement des eaux industrielles par séparation séparée des gaz et des matières solides
DE102012215577A1 (de) * 2012-09-03 2014-03-06 Voith Patent Gmbh Drucksortierer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19926087A1 (de) * 1998-06-10 1999-12-16 Valmet Corp Verfahren zur Regelung des Flächengewichts von Papier oder Karton in einer Papier- oder Kartonmaschine
EP0969142A2 (fr) * 1998-06-29 2000-01-05 Voith Sulzer Papiertechnik 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
WO2003034170A1 (fr) * 2001-10-19 2003-04-24 Metso Automation Oy Procede et appareil pour commander le fonctionnement de l'unite de preparation de la pate dans une machine a papier
DE102004051327A1 (de) * 2004-10-21 2006-05-04 Voith Paper Patent Gmbh Verfahren zur Entgasung und Zuführung einer Faserstoffsuspension zu einem Stoffauflauf sowie Entgasungsvorrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE428810B (sv) * 1981-12-01 1983-07-25 Karlstad Mekaniska Ab Regelersystem for reglering av en flerskiktsinloppslada for en pappersmaskin
FI19991793A7 (fi) * 1999-08-23 2001-02-24 Andritz Oy Menetelmä paperikoneen tai vastaavan lähestymisjärjestelmän toiminnan ohjaamiseksi
DE10005694A1 (de) * 2000-02-09 2001-08-16 Voith Paper Patent Gmbh Verfahren zur Herstellung einer fertigen Stoffsuspension und konstanter Teil einer Papier- oder Kartonmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19926087A1 (de) * 1998-06-10 1999-12-16 Valmet Corp Verfahren zur Regelung des Flächengewichts von Papier oder Karton in einer Papier- oder Kartonmaschine
EP0969142A2 (fr) * 1998-06-29 2000-01-05 Voith Sulzer Papiertechnik 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
WO2003034170A1 (fr) * 2001-10-19 2003-04-24 Metso Automation Oy Procede et appareil pour commander le fonctionnement de l'unite de preparation de la pate dans une machine a papier
DE102004051327A1 (de) * 2004-10-21 2006-05-04 Voith Paper Patent Gmbh Verfahren zur Entgasung und Zuführung einer Faserstoffsuspension zu einem Stoffauflauf sowie Entgasungsvorrichtung

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009021805A1 (fr) * 2007-08-11 2009-02-19 Voith Patent Gmbh Dispositif de régulation de consistance pour une machine à papier
CN102282313A (zh) * 2008-12-12 2011-12-14 沃依特专利有限责任公司 上浆系统-筛分装置
CN102282313B (zh) * 2008-12-12 2014-09-17 沃依特专利有限责任公司 上浆系统-筛分装置
ITFI20120154A1 (it) * 2012-07-25 2014-01-26 Toscotec S P A Impianto per la produzione di materiale cellulosico tramite una sospensione acquosa di fibre
EP2690216A1 (fr) * 2012-07-25 2014-01-29 Toscotec S.P.A. Système de production d'une bande de cellulose à partir d'une suspension aqueuse de fibres de cellulose
US10995454B2 (en) * 2013-12-19 2021-05-04 3M Innovative Properties Company Using recycled waste water to make nonwoven fibrous materials suitable for use in a pollution control device or in a firestop
CN114108353A (zh) * 2021-12-10 2022-03-01 安德里茨（中国）有限公司 筛选系统
CN114108353B (zh) * 2021-12-10 2024-03-01 安德里茨（中国）有限公司 筛选系统
CN115787336A (zh) * 2022-12-09 2023-03-14 安德里茨（中国）有限公司 用于造纸备浆线的混浆槽装置以及造纸备浆线
CN115787336B (zh) * 2022-12-09 2024-01-19 安德里茨（中国）有限公司 用于造纸备浆线的混浆槽装置以及造纸备浆线

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Publication number Publication date
DE102006036018B3 (de) 2008-01-31

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