WO2013045325A1 - Procédé de fonctionnement pour une préparation de pâte à papier - Google Patents

Procédé de fonctionnement pour une préparation de pâte à papier Download PDF

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Publication number
WO2013045325A1
WO2013045325A1 PCT/EP2012/068417 EP2012068417W WO2013045325A1 WO 2013045325 A1 WO2013045325 A1 WO 2013045325A1 EP 2012068417 W EP2012068417 W EP 2012068417W WO 2013045325 A1 WO2013045325 A1 WO 2013045325A1
Authority
WO
WIPO (PCT)
Prior art keywords
parameter
pulp suspension
chest
measuring
control
Prior art date
Application number
PCT/EP2012/068417
Other languages
German (de)
English (en)
Inventor
Jens Haag
Christian Naydowski
Jürgen KÄSER
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
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Application filed by Voith Patent Gmbh filed Critical Voith Patent Gmbh
Priority to ES12766412.6T priority Critical patent/ES2628435T3/es
Priority to CN201280047562.0A priority patent/CN103842580B/zh
Priority to EP12766412.6A priority patent/EP2761080B1/fr
Publication of WO2013045325A1 publication Critical patent/WO2013045325A1/fr

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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
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/38—Conserving the finely-divided cellulosic material
    • 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
    • D21D5/28—Tanks for storing or agitating pulp
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0009—Paper-making control systems
    • D21G9/0018—Paper-making control systems controlling the stock preparation

Definitions

  • the invention relates to an operating method for a stock preparation of a paper, tissue or board machine for producing a fibrous web, comprising at least one chest for the preparation and storage of a pulp suspension.
  • Machines for producing a paper or fibrous web always include an area in which the fibrous materials from which the fibrous web is produced in the machine are processed. This area is commonly called stock preparation.
  • the stock preparation is followed by the constant part of the machine, in which the fibers, which were prepared in the stock preparation to a pulp suspension, are diluted so far that a fiber suspension with about 1 to 2% solids content is formed, which then on the headbox on The molding mesh is applied and dewatered there.
  • the constant part consists of a cycle in which large quantities of process water are circulated.
  • process water the fibers, auxiliaries and ash particles, etc., from which the fibrous web is produced in the machine, are transported and processed in such a way that a uniform pulp suspension with a desired consistency is available in the machine headbox.
  • various laid paper are provided.
  • several laid paper are arranged one behind the other, in which the pulp is stored, mixed and / or treated in different concentrations and quantities.
  • an anaerobic condition occurs during standstill.
  • this anaerobic growth in the laid paper causes the finished product to discolor and smells bad, the probability of a web break increases many times over.
  • the increased use of chemicals also leads to an undesirably high concentration of chemicals in the constant part, since not all chemicals are discharged from the material cycle with the finished paper.
  • An essential object of the invention is to propose an improved, but at least alternative, batch operation / batch management, which is characterized in particular by a more stable operation.
  • an operating method for a stock preparation of the type mentioned at the outset which has a measurement / control / regulation Device, wherein by means of the measuring / control / regulating device at least one property parameter of the pulp suspension is determined, and by means of the measuring / control / regulating device, at least one conditioning parameter of the pulp suspension is adjusted such that at least a quality parameter of the pulp suspension remains in at least one chest within a predetermined interval when a threshold value of at least one property parameter is reached, undershot or exceeded.
  • An operating method or also batch management is understood to mean a method by which the at least one chest can be controlled or regulated in order to always provide a sufficient stock of pulp suspension with quality parameters suitable for fiber web production.
  • Property parameters suitable for this purpose are preferably parameters which can be selected from the following group of property parameters: a physical parameter, such as temperature, bin fill level, suspension of the pulp suspension or degree of mixing, a chemical parameter, such as pH, gas concentrations, etc. a biological parameter, such as the presence of certain protozoa, such as bacteria or fungal spores - a biochemical parameter, such as bacteria or fungus precipitants, that grow in the pulp suspension.
  • a physical parameter such as temperature, bin fill level, suspension of the pulp suspension or degree of mixing
  • a chemical parameter such as pH, gas concentrations, etc.
  • a biological parameter such as the presence of certain protozoa, such as bacteria or fungal spores -
  • a biochemical parameter such as bacteria or fungus precipitants
  • the measurement of an oxygen saturation in the pulp suspension by means of the measuring / control / regulating device is suitable as a property parameter.
  • the redox potential can also be used as a meaningful property parameter or measurand.
  • the selected property parameter (s) can be selected within the stock be measured at various points, in particular at the entrance / in and / or at the exit of the Bütte.
  • At least one of the preparation parameters can be changed by means of the measuring / control / regulating device: a filling level in the chest, in particular if the biocide infestation is very large, the level then preferably being is lowered to reduce the amount of infested suspension. a thorough mixing of the pulp suspension, if, in particular in a Bütte, a dead area has formed. a composition of the pulp suspension.
  • the composition of the fiber suspension can be changed in various ways, so biocides and / or other additives can be mixed into the pulp suspension.
  • the mixing of the fiber suspension can be changed by changing the flow in the chest when changing at least one quality parameter of the pulp suspension. This is achieved in a preferred manner in that the flow in the chest is changed by means of a stirrer. This can be done for example by means of an additionally installed agitator or by Lufteinschnüffelung.
  • the object is achieved by means of a device, wherein this comprises at least one chute for the preparation and storage of a pulp suspension and a measuring / control / regulating device, wherein by means of the measuring / control / regulating device at least one property parameter the Faserstoffsus- pension can be determined, and by means of the measuring / control / regulating device, at least one conditioning parameter of the pulp suspension is adaptable such that at least one quality parameter of the pulp suspension remains in at least one Bütte within a predetermined interval, if a Threshold of at least one property parameter reached, undercut or exceeded becomes.
  • the measuring / control / regulating device consists of at least one measuring point, a matching device for changing the quality parameters of the suspension and an evaluation unit or control or regulating device.
  • the adaptation device is a metering, stirring and / or blowing device.
  • biocide use can be advantageously reduced.
  • FIG. 1 shows the essential components of the wastepaper stock preparation of a paper machine.
  • the waste paper is dissolved into a uniform pulp, the necessary water comes wholly or partly from the machine.
  • the collection bin (s) 2 are designed so that it can be stored in their pulp for about 1 -10 hours of operation of the paper machine or that it takes 1 to 10 hours to the pulp once replaced.
  • a pulper is understood as meaning a large mixing vat used in industry in the production of paper, board or tissue webs in order to further dissolve the pulp.
  • the volume of the pulper 3 is between 12 and 100 m 3 .
  • Inn Pulper 3 the pulp is further dissolved and diluted with the addition of process water.
  • the consistency of the resulting pulp suspension in the pulper 3 is about 10 to 18%.
  • Contaminants such as garbage, metal wires, sand, etc., which can not be removed beforehand, e.g. Sand, are then sorted out by means of a Schwerteilcleaners 5. Contaminants that can not be filtered out by the screen plate of Schwerteilcleaners 5 can still be removed in subsequent finer grades, pre-sorting.
  • the purified pulp suspension is then pumped into the pulper Ableerbütte 6, which can stockpile a supply of also about 1-10 hours. Before the pulp suspension enters the process water cycle, the fiber fraction which is not suitable for papermaking is sorted out in a presorting 7.
  • the pulp suspension is stored intermediately before it is fed to the process water of the constant part. This is done in a mixing device in which the pulp suspension is diluted with process water to a pulp suspension with about 3 to 6% solids.
  • the mixing device can also be used to mix other proportions of pulps and solids of the pulp suspension.
  • the machine chest 10 is the last chest before the headbox. It already belongs to the constant part 14 of the paper machine. In order to ensure a constant suspension pressure in the constant part, it is always necessary to pump at least as much pulp suspension from the mixing chest into the machine chest that it has a constant level of fill level. This is achieved by constantly pumping more fiber suspension into the machine chest from the mixing chest, as is removed from the machine chest 10. The excess portion passes through an overflow back into the mixing tank, so on the one hand, the level is always kept constant and the contents of the machine chest constantly in motion, so there is always a uniform pulp suspension under constant pressure conditions. In some, not shown, downstream of the dilution stages, a further dilution of the pulp suspension before it finally reaches the machine via the headbox.
  • measuring devices are provided by means of which the formation of anaerobic states can be recognized. These can be oxygen measuring devices, redox potential measuring devices, pH measuring devices and / or temperature measuring devices. The measurement takes place either directly in the chest, or inside the chest, or in the feed or discharge of the laid paper.
  • the measured property parameter (s) of the pulp suspension are processed in the measuring / control / regulating device and by means of the measuring / control / regulating device at least one conditioning parameter of the pulp suspension is adapted in such a way that at least one quality parameter Parameter of the pulp suspension remains in at least one chest within a predetermined interval, when a threshold value of at least one property parameter is reached, exceeded or exceeded.
  • the situation is assessed by means of individual measurements or by combining several measurements. As soon as a condition is reached which indicates the danger of an excessive growth or the aggravation of an anaerobic condition, a further aggravation can be counteracted. For counteracting or stopping the anaerobic growth, various intervention options are available by means of which the conditioning parameters can be changed.
  • a simple and effective way to stop growth is to empty the affected tub as well as the laid paper adjacent to this tub. This prevents new material from being directly re-infested. Since this is usually not so easy, especially in the machine chest is not possible at all, the quality level is only lowered and by means of a Dosiervorrich- changed the biocide dosage to stock preparation.
  • the biocides can be metered into the water cycle at various points.
  • the metering before and / or directly in the affected paper by means of a metering device.
  • the metered addition of the biocides can be kept low if the amount of the affected suspension is low and the level is low.
  • the stock preparation is operated such that the lowest level of biocidal growth, the level of the affected and the subsequent laid paper is lowered and parallel to the biocide is increased and only when the biocidal growth is stopped, the level is increased again.
  • recirculation devices can be provided which change the circulation within a chest by deliberately changing the flow in the chest such that the sources of production of anaerobic growth herds, which usually arise in dead zones, are moved out of these.
  • the speed of the mixing device can be changed in the Mischbütten or an additional mixing device, such as a Heileinschnüffelung be provided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un procédé de fonctionnement pour une préparation de pâte à papier d'une machine à papier, d'une machine à papier tissu, d'une machine à carton, pour la production d'une bande de matière fibreuse, comprenant au moins une cuve pour la préparation et le stockage d'une suspension de matière fibreuse, et un dispositif de mesure/commande/réglage, procédé selon lequel, au moyen du dispositif de mesure/commande/réglage, au moins un paramètre de propriété de la suspension de matière fibreuse est déterminé, et au moyen du dispositif de mesure/commande/réglage, au moins un paramètre de préparation de la suspension de matière fibreuse est adapté, de façon qu'au moins un paramètre de qualité de la suspension de matière fibreuse, demeure, dans au moins une cuve, à l'intérieur d'un intervalle prédéterminé, lorsqu'on est au-dessous ou au-dessus d'une valeur seuil d'au moins un paramètre de propriété.
PCT/EP2012/068417 2011-09-29 2012-09-19 Procédé de fonctionnement pour une préparation de pâte à papier WO2013045325A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES12766412.6T ES2628435T3 (es) 2011-09-29 2012-09-19 Procedimiento de funcionamiento para un área de preparación de pasta papelera
CN201280047562.0A CN103842580B (zh) 2011-09-29 2012-09-19 浆料制备装置的运行方法
EP12766412.6A EP2761080B1 (fr) 2011-09-29 2012-09-19 Procédé de fonctionnement pour une préparation de pâte à papier

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011083709.4 2011-09-29
DE201110083709 DE102011083709A1 (de) 2011-09-29 2011-09-29 Betriebsverfahren für eine Stoffaufbereitung

Publications (1)

Publication Number Publication Date
WO2013045325A1 true WO2013045325A1 (fr) 2013-04-04

Family

ID=46940467

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/068417 WO2013045325A1 (fr) 2011-09-29 2012-09-19 Procédé de fonctionnement pour une préparation de pâte à papier

Country Status (5)

Country Link
EP (2) EP2851466B1 (fr)
CN (1) CN103842580B (fr)
DE (1) DE102011083709A1 (fr)
ES (1) ES2628435T3 (fr)
WO (1) WO2013045325A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020114657A1 (fr) * 2018-12-07 2020-06-11 Voith Patent Gmbh Procédé de fonctionnement d'une installation pour la fabrication d'une bande de matière fibreuse
US11598051B2 (en) 2017-06-21 2023-03-07 Kemira Oyj Method for manufacturing a fibrous web

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6879106B2 (ja) * 2017-07-31 2021-06-02 セイコーエプソン株式会社 解繊物製造装置、及びシート製造装置
FI130064B (en) * 2017-12-08 2023-01-13 Kemira Oyj METHOD FOR PREDICTING OR CONTROLLING MICROSTATICITY IN THE MANUFACTURING PROCESS OF PAPER OR BOARD
FI20225664A1 (en) * 2022-07-14 2024-01-15 Kemira Oyj Biocide control in papermaking

Citations (3)

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WO2003018908A1 (fr) * 2001-08-21 2003-03-06 Liqum Oy Procede dans un traitement de papier ou de pate pour le controle de l'etat chimique de la pate et systeme d'eau de circulation
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
EP1785525A1 (fr) * 2005-11-14 2007-05-16 Metso Automation Oy Mesures d'un procédé papier/carton

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SE442414B (sv) * 1981-09-22 1985-12-23 Holmens Bruk Ab Sett att minska eller inhibera morkfergningen av massa eller papper i bakvattensystem
AU4219496A (en) 1995-02-07 1996-08-15 Betz Laboratories, Inc. Inhibiting anaerobic production of volatile fatty acids and hydrogen by bacteria
US6423183B1 (en) 1997-12-24 2002-07-23 Kimberly-Clark Worldwide, Inc. Paper products and a method for applying a dye to cellulosic fibers
FI103678B (fi) 1998-06-10 1999-08-13 Metso Paper Automation Oy Menetelmä paperin tai kartongin neliömassan säätämiseksi paperi- tai k artonkikoneessa
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FI122839B (fi) 2006-09-21 2012-07-31 Metso Automation Oy Kierrätyskuituprosessi
CN201155067Y (zh) * 2008-04-03 2008-11-26 中国轻工业长沙工程有限公司 一种为纸机上浆系统提供浆料的设备
DE102010001801A1 (de) * 2010-02-11 2011-08-11 Voith Patent GmbH, 89522 Abwasserreinigungsanlage

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
WO2003018908A1 (fr) * 2001-08-21 2003-03-06 Liqum Oy Procede dans un traitement de papier ou de pate pour le controle de l'etat chimique de la pate et systeme d'eau de circulation
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
EP1785525A1 (fr) * 2005-11-14 2007-05-16 Metso Automation Oy Mesures d'un procédé papier/carton

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11598051B2 (en) 2017-06-21 2023-03-07 Kemira Oyj Method for manufacturing a fibrous web
WO2020114657A1 (fr) * 2018-12-07 2020-06-11 Voith Patent Gmbh Procédé de fonctionnement d'une installation pour la fabrication d'une bande de matière fibreuse

Also Published As

Publication number Publication date
EP2761080A1 (fr) 2014-08-06
EP2851466B1 (fr) 2017-05-31
EP2851466A1 (fr) 2015-03-25
CN103842580A (zh) 2014-06-04
EP2761080B1 (fr) 2017-05-17
ES2628435T3 (es) 2017-08-02
CN103842580B (zh) 2017-03-01
DE102011083709A1 (de) 2013-04-04

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