EP2761080B1 - Betriebsverfahren für eine stoffaufbereitung - Google Patents

Betriebsverfahren für eine stoffaufbereitung Download PDF

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Publication number
EP2761080B1
EP2761080B1 EP12766412.6A EP12766412A EP2761080B1 EP 2761080 B1 EP2761080 B1 EP 2761080B1 EP 12766412 A EP12766412 A EP 12766412A EP 2761080 B1 EP2761080 B1 EP 2761080B1
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EP
European Patent Office
Prior art keywords
parameter
chest
fibrous suspension
measuring
controlling
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.)
Revoked
Application number
EP12766412.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2761080A1 (de
Inventor
Jens Haag
Christian Naydowski
Jürgen KÄSER
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.)
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Publication date
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Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Priority to EP14189989.8A priority Critical patent/EP2851466B1/de
Publication of EP2761080A1 publication Critical patent/EP2761080A1/de
Application granted granted Critical
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Revoked legal-status Critical Current
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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.
  • a method is for example from the document WO03 / 018908 A1 known.
  • the invention also relates to a corresponding device.
  • 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 forming fabric 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 in the headbox of the machines a uniform pulp suspension with a desired consistency is available.
  • biocides when used too much, have the disadvantage that they degrade the papermaking process and additional chemicals must be used to keep the papermaking process stable.
  • various laid paper are provided for intermediate storage, storage and / or the provision of the pulp suspension.
  • 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 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 is proposed, which is a measurement / control / regulation device wherein at least one characteristic parameter of the pulp suspension is determined by means of 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 such that at least one 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, not reached 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 supply of pulp suspension with quality parameters suitable for fibrous web production.
  • the measurement of 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) may be within the stock preparation be measured at various points, especially at the entrance / in and / or at the exit of the chest.
  • 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 pulp suspension 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 chest within a predetermined interval, if a threshold value at least of a property parameter is 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.
  • the invention is based on a in FIG. 1 illustrated schematically stock preparation.
  • FIG. 1 shows the essential components of waste paper pulp processing 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 to be a large mixing vat used in industry in the manufacture of paper, board or tissue webs to further dissolve the pulp.
  • the volume of the pulper 3 is between 12 and 100 m 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 belongs to machine technology already 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 reprocessing parameter of the pulp suspension is adapted such 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, the quality level is only lowered and by means of a metering device 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 in such a way that at the lowest signs of biocidal growth, the level of the affected and subsequent slips 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)
EP12766412.6A 2011-09-29 2012-09-19 Betriebsverfahren für eine stoffaufbereitung Revoked EP2761080B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14189989.8A EP2851466B1 (de) 2011-09-29 2012-09-19 Betriebsverfahren für eine Stoffaufbereitung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110083709 DE102011083709A1 (de) 2011-09-29 2011-09-29 Betriebsverfahren für eine Stoffaufbereitung
PCT/EP2012/068417 WO2013045325A1 (de) 2011-09-29 2012-09-19 Betriebsverfahren für eine stoffaufbereitung

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP14189989.8A Division-Into EP2851466B1 (de) 2011-09-29 2012-09-19 Betriebsverfahren für eine Stoffaufbereitung
EP14189989.8A Division EP2851466B1 (de) 2011-09-29 2012-09-19 Betriebsverfahren für eine Stoffaufbereitung

Publications (2)

Publication Number Publication Date
EP2761080A1 EP2761080A1 (de) 2014-08-06
EP2761080B1 true EP2761080B1 (de) 2017-05-17

Family

ID=46940467

Family Applications (2)

Application Number Title Priority Date Filing Date
EP12766412.6A Revoked EP2761080B1 (de) 2011-09-29 2012-09-19 Betriebsverfahren für eine stoffaufbereitung
EP14189989.8A Active EP2851466B1 (de) 2011-09-29 2012-09-19 Betriebsverfahren für eine Stoffaufbereitung

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP14189989.8A Active EP2851466B1 (de) 2011-09-29 2012-09-19 Betriebsverfahren für eine Stoffaufbereitung

Country Status (5)

Country Link
EP (2) EP2761080B1 (zh)
CN (1) CN103842580B (zh)
DE (1) DE102011083709A1 (zh)
ES (1) ES2628435T3 (zh)
WO (1) WO2013045325A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI128324B (en) 2017-06-21 2020-03-31 Kemira Oyj Process for making fiber web
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
DE102018131295A1 (de) * 2018-12-07 2020-06-10 Voith Patent Gmbh Betriebsverfahren für eine Anlage zur Herstellung einer Faserstoffbahn
FI20225664A1 (en) * 2022-07-14 2024-01-15 Kemira Oyj Biocide control in papermaking

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0726357A1 (en) 1995-02-07 1996-08-14 Betz Laboratories Inc. Inhibiting anaerobic production of volatile fatty acids and hydrogen by bacteria
WO1999064665A1 (en) 1998-06-10 1999-12-16 Neles Paper Automation Oy Method for regulation of the basis weight of paper or board in a paper or board machine
US6187135B1 (en) 1999-03-30 2001-02-13 Sun Ho Chung Process for making recycled paper having improving strength properties
US20030037896A1 (en) 1998-01-22 2003-02-27 Mike Thomas Goulet Paper products and a method for applying a dye to cellulosic fibers
WO2003034170A1 (en) 2001-10-19 2003-04-24 Metso Automation Oy Method and apparatus for controlling the operation of stock preparation of a paper machine
WO2004020733A1 (en) 2002-09-02 2004-03-11 Gkp Technologies, Inc. Apparatus and method for automatically defibering and extracting kraft pulp from old corrugated cardboard
EP1785525A1 (en) 2005-11-14 2007-05-16 Metso Automation Oy Measurement of paper/board process
US20080023161A1 (en) 2004-12-14 2008-01-31 Reinhard Gather Method and apparatus for loading fibers or cellulose which are contained in a suspension with a filler
WO2008034953A1 (en) 2006-09-21 2008-03-27 Metso Automation Oy Flotation in recycled fibre process

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE442414B (sv) * 1981-09-22 1985-12-23 Holmens Bruk Ab Sett att minska eller inhibera morkfergningen av massa eller papper i bakvattensystem
FI20025023A (fi) * 2001-08-21 2003-02-22 Liqum Oy Menetelmä paperi- tai selluprosessissa massa- ja kiertovesijärjestelmän kemiallisen tilan hallitsemiseksi
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 (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0726357A1 (en) 1995-02-07 1996-08-14 Betz Laboratories Inc. Inhibiting anaerobic production of volatile fatty acids and hydrogen by bacteria
US20030037896A1 (en) 1998-01-22 2003-02-27 Mike Thomas Goulet Paper products and a method for applying a dye to cellulosic fibers
WO1999064665A1 (en) 1998-06-10 1999-12-16 Neles Paper Automation Oy Method for regulation of the basis weight of paper or board in a paper or board machine
US6187135B1 (en) 1999-03-30 2001-02-13 Sun Ho Chung Process for making recycled paper having improving strength properties
WO2003034170A1 (en) 2001-10-19 2003-04-24 Metso Automation Oy Method and apparatus for controlling the operation of stock preparation of a paper machine
WO2004020733A1 (en) 2002-09-02 2004-03-11 Gkp Technologies, Inc. Apparatus and method for automatically defibering and extracting kraft pulp from old corrugated cardboard
US20080023161A1 (en) 2004-12-14 2008-01-31 Reinhard Gather Method and apparatus for loading fibers or cellulose which are contained in a suspension with a filler
EP1785525A1 (en) 2005-11-14 2007-05-16 Metso Automation Oy Measurement of paper/board process
WO2008034953A1 (en) 2006-09-21 2008-03-27 Metso Automation Oy Flotation in recycled fibre process

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"Development of Papermaking Process Based on Integrated Process and Control Design", TAMPERE UNIVERSITY OF TECHNOLOY, 2002, pages 56 - 69, XP055465545
"process control", PAPERMAKING SCIENCE AND TECHNOLOGY, 1999, Finland, XP055465525
ROBERT J. MCGILL: "Measurement and Control in Papermaking", 1980, pages 278 - 411, XP055465535

Also Published As

Publication number Publication date
ES2628435T3 (es) 2017-08-02
CN103842580A (zh) 2014-06-04
WO2013045325A1 (de) 2013-04-04
DE102011083709A1 (de) 2013-04-04
EP2761080A1 (de) 2014-08-06
CN103842580B (zh) 2017-03-01
EP2851466B1 (de) 2017-05-31
EP2851466A1 (de) 2015-03-25

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