EP1841914A2 - Dispositif et procede de fabrication d'une bande de matiere fibreuse - Google Patents

Dispositif et procede de fabrication d'une bande de matiere fibreuse

Info

Publication number
EP1841914A2
EP1841914A2 EP05813366A EP05813366A EP1841914A2 EP 1841914 A2 EP1841914 A2 EP 1841914A2 EP 05813366 A EP05813366 A EP 05813366A EP 05813366 A EP05813366 A EP 05813366A EP 1841914 A2 EP1841914 A2 EP 1841914A2
Authority
EP
European Patent Office
Prior art keywords
pulp suspension
fibrous web
waste paper
producing
suitable step
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Withdrawn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
EP05813366A
Other languages
German (de)
English (en)
Inventor
Ulrich Begemann
Michael Schwarz
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 EP1841914A2 publication Critical patent/EP1841914A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • D21G9/0027—Paper-making control systems controlling the forming section
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F13/00—Making discontinuous sheets of paper, pulpboard or cardboard, or of wet web, for fibreboard production
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/14—Secondary fibres
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/01—Waste products, e.g. sludge
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/04—Addition to the pulp; After-treatment of added substances in the pulp
    • D21H23/06—Controlling the addition
    • D21H23/08—Controlling the addition by measuring pulp properties, e.g. zeta potential, pH
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/02—Working-up waste paper
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Definitions

  • the invention relates to an arrangement for determining the amount of at least one component and or the value of at least one property of a feed stream for the production process of a fibrous web from a pulp suspension, which is produced using waste paper.
  • DE 101 07 448 A1 discloses a method and a device for processing a pulp suspension.
  • fibers contained in a pulp suspension are loaded with a filler by means of a chemical precipitation reaction.
  • the pulp suspension is fed to a pump disperger and acted upon in this by shear forces to break up larger fiber agglomerates into smaller or even individual fibers.
  • the pump disperger is used simultaneously as a reactor for the chemical precipitation reaction.
  • This object is achieved by a method for producing a fibrous web from a pulp suspension in which the pulp suspension is at least partially made from waste paper, wherein the proportion of at least one component in the waste paper before the addition of waste paper to the production process of the pulp suspension is determined and depending on the determined proportion of the component in the waste paper is at least taken a suitable step to adjust the proportion of the component in the pulp suspension to a desired value or to obtain a specific property of the pulp suspension.
  • the component in question is preferably the ash content in the waste paper.
  • the at least one suitable step comprises a presorting and mixing of waste paper with different ash contents, so that waste paper mixtures are always given for stock preparation, which, for example, have a constant ash content.
  • a further embodiment of the invention may optionally and / or additionally be provided that takes place at least one suitable step in the production process of the pulp suspension after the addition of waste paper.
  • the stock preparation process is adjusted according to, for example, the ash content in the supplied waste paper.
  • a concrete embodiment of the o.g. Embodiment may provide that the at least one step of the manufacturing process is a change of the overflow in a flotation cell.
  • the overflow in a flotation cell By changing the overflow in a flotation cell, a kind of sorting effect takes place, whereby the ash content in the pulp suspension can be adjusted.
  • the ash content of the waste paper is measured by means of electromagnetic radiation, in particular by means of gamma radiation, in order to determine the ash content.
  • electromagnetic radiation in particular by means of gamma radiation
  • the weight of the waste paper is measured. This is preferably done by means of a pressure cell.
  • An advantageous embodiment of the invention therefore provides that the moisture content of the waste paper is measured to determine the ash content.
  • the measured values are compared with comparative data of a database by means of a comparator for determining the ash content, and absolute values are generated from the measured values by means of a computing unit.
  • the proportion of at least one component varies between a maximum value and a minimum value, for example depending on the fed waste paper quality, provided that the proportion of the at least one component is maintained at a desired value between the maximum and the minimum value by partially removing the component from the pulp suspension by means of at least one suitable step if necessary and partially replacing the at least one component by means of at least one suitable step of the pulp suspension is supplied.
  • the proportion of inorganic ingredients can be maintained at a level below the maximum values.
  • a high ash content is present in the supplied paper material, it is removed by targeted deashing.
  • the at least one suitable step takes place, for example, during the production of the pulp suspension and / or in the machine for producing the fibrous web.
  • the at least one suitable step in the production of the pulp suspension is provided by at least one additional washing and / or flotation process.
  • the at least one suitable step takes place in the Production of the fibrous web in the paper machine in the initial dewatering area, in particular by setting the Formiersaugervakuum and / or the pressure pulses of the dewatering strips on the formed fibrous web.
  • ash-rich material components in liquid form in stack towers or in the form of thickened solid is possible.
  • the ash-rich material is then reintroduced into the manufacturing process, if the ash content, for example, falls below the desired level.
  • the invention can achieve a constant process of papermaking at a lower ash level.
  • a method for producing a fibrous web from a pulp suspension in which at least one property of the pulp suspension is measured and, based thereon, at least one suitable step for setting the machine for
  • Production of the fibrous web for example. Paper machine, is made to keep at least a certain property of the fibrous web at a desired value and / or the productivity of the machine for producing the
  • At least one property of the pulp suspension is measured and based on the preparation of the pulp suspension at least a suitable step is taken to at least a certain at substantially unchanged setting of the machine for producing the fibrous web To maintain the property of the fibrous web at a desired value and / or to keep the productivity of the machine for producing the fibrous web at a desired value.
  • the possibility is created to use the paper machine settings as a basis for stock preparation regulations and / or the constant part of a papermaking plant.
  • the freeness of the pulp to be used in the paper machine can be determined.
  • the amount of rejects in the paper production is reduced, since already before or during the production of the fibrous web changing properties of the pulp suspension can be detected and appropriate corrective action can be taken. Processes can be adapted faster; the quality consistency is increased.
  • the at least one property of the pulp suspension is measured periodically or online, so that according to the invention it is possible to pre-set in the paper machine such that the runnability / productivity (runnability) of the paper machine and the quality properties of the finished paper remain constant.
  • the at least one suitable step is taken taking into account empirical and / or theoretical dependencies between properties of the pulp suspension and / or settings of the machine for producing the fibrous web and / or properties of the fibrous web.
  • the at least one property of the pulp suspension is, for example: the freeness or the ash content or the fine fraction or the color content in the Fibrous suspension.
  • the freeness of the pulp in the pulp suspension depends on the freeness of the pulp in the pulp suspension, the negative pressure that is necessary in the Formiersauger in the initial drainage area to achieve a desired drainage.
  • the ash content in the pulp suspension can be depending on the ash content in the pulp suspension by de n negative pressure in Formiersauger in the initial drainage set a desired ash content in the fibrous web formed.
  • Fig. 1 is a conveyor belt for feeding waste paper in a
  • FIG. 2 shows the scheme of a flotation cell with an upstream measuring cell and
  • FIG. 3 shows a representation of the percentage ash content in the pulp suspension as a function of time.
  • Waste paper pieces 1 which are composed in particular of graphic waste paper pieces, ie printed newspapers and magazines, are transported via a conveyor belt 2.
  • the weight of the waste paper pieces 1 via a pressure cell 3 or other means for determining the weight of the waste paper pieces 1 is determined.
  • the material properties of the waste paper measuring devices 4, 5 are used, which determine properties of the waste paper pieces 1 with the aid of electromagnetic waves.
  • IR radiation is particularly suitable.
  • Gamma rays can also be used to determine the material properties.
  • the measured values are fed to a computing unit 7 via a measuring transducer 6.
  • the measured values for example, in a database
  • the determined integral composition of the waste paper pieces 1 on the conveyor belt 2 can be from a reservoir 9 waste paper pieces 10 or other paper grades with known compositions add to the waste paper pieces 1.
  • waste paper pieces 1 after their dissolution and some cleaning and sorting steps not discussed in detail - possibly mixed with paper of other quality - Flotationszellen supplied, which are connected in and behind each other and each have supply and discharge devices to a fiber suspension in the desired composition to produce, which is supplied via a non-descript constants part of the wire section of a paper machine.
  • a flotation cell 11 (FIG. 2) is used, which is fed via a feed line 12 with a feed pump 13 pulp suspension.
  • an ash detector 14 is provided within the inflow line 12 to determine the ash content of the supplied pulp suspension and to supply a control unit 15 via a line 16 measuring signals.
  • a signal quantity is generated by the control unit 15 on the basis of a comparison of the ash content in the inflow line 12 and in a line 17, via which the accept is forwarded to the headbox or to a storage device, due to which the proportion of non-recoverable substance mixture (Reject) to the proportion of the accept.
  • the reject is derived via an overflow 18 of the flotation cell 11.
  • the non-utilisable mixture is discharged via a line 19, the accepts via a line 20.
  • the control unit 15 also determines the opening of a valve 20 and the feed pump thirteenth
  • the deviation of the ash content in the inflow to the flotation cell 11 in the ratio inlet / Acceptance volume flow is determined. For example, if the ash content in the feed is too high, the Acceptance volume flow reduced and at the same time the reject proportion increased.
  • the desired composition of the pulp suspension can be reached, which is fed to the headbox of the paper machine.
  • Figure 3 shows how over the course of time the ash content is equalized by ash addition or ash removal, so that the headbox always a pulp suspension is supplied with a constant ash content.
  • FIG. 4 shows in section-wise schematic representation of a "feed-forward" control of a paper machine 22 on the basis of measured properties of a pulp suspension 21 at the end of the production process of the pulp suspension 21.
  • the pulp suspension 21 is produced in a unit 23 for producing the pulp suspension (stock preparation), for example from waste paper, mechanical pulp. Thereafter, the pulp suspension 21 is fed to the so-called constant part 24, from which the pulp suspension 21 reaches a headbox 25 of the paper machine 22 in a forming section 26 in which a pulp web 33 is formed from the pulp suspension 21.
  • the Formierpartie 26 is shown in the present illustration only in the initial drainage area.
  • the ash content of the pulp suspension 21 is measured.
  • the measuring signal 27 is fed to a control and regulation unit 28 which, based thereon, undertakes suitable steps in the form of control signals 29 and 30 for setting forming strips 31 or a forming suction 32 in the initial dewatering area of the forming section 26, by at least one specific property, such as For example, the ash content of the fibrous web 33 formed from the pulp suspension 21, to keep at a desired value.
  • the ash content of the fibrous web 33 is measured and fed to the control and regulation unit 28, which measures this value 34 in the execution of the abovementioned suitable steps 29 and 30 considered.

Landscapes

  • Paper (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une bande de matière fibreuse à partir d'une suspension de matière fibreuse, consistant à mesurer au moins une propriété de la suspension de matière fibreuse, et à procéder, sur la base de la mesure, à au moins une étape de réglage de la machine destinée à la fabrication de la bande de matière fibreuse afin de maintenir au moins une propriété définie de la bande de matière fibreuse à une valeur de consigne et/ou maintenir la productivité de la machine destinée à la fabrication de la bande de matière fibreuse à une valeur de consigne.
EP05813366A 2005-01-20 2005-11-30 Dispositif et procede de fabrication d'une bande de matiere fibreuse Withdrawn EP1841914A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510002638 DE102005002638A1 (de) 2005-01-20 2005-01-20 Aschebestimmung
PCT/EP2005/056337 WO2006076977A2 (fr) 2005-01-20 2005-11-30 Dispositif et procede de fabrication d'une bande de matiere fibreuse

Publications (1)

Publication Number Publication Date
EP1841914A2 true EP1841914A2 (fr) 2007-10-10

Family

ID=36650480

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05813366A Withdrawn EP1841914A2 (fr) 2005-01-20 2005-11-30 Dispositif et procede de fabrication d'une bande de matiere fibreuse

Country Status (5)

Country Link
EP (1) EP1841914A2 (fr)
JP (1) JP2008528814A (fr)
KR (1) KR20070103436A (fr)
DE (1) DE102005002638A1 (fr)
WO (1) WO2006076977A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012204067A1 (de) * 2012-03-15 2013-09-19 Voith Patent Gmbh Verfahren zur Steuerung oder Regelung eines Faserstoffbahnherstellungsprozesses
JP6281453B2 (ja) * 2014-09-12 2018-02-21 王子ホールディングス株式会社 古紙から再生パルプを製造するための改良されたシステム
DE102021103233A1 (de) * 2021-02-11 2022-08-11 Voith Patent Gmbh Optimierte Herstellung eines Altpapierprodukts

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02160992A (ja) * 1988-12-12 1990-06-20 Toshiba Corp 抄紙プラントの坪量制御装置
JP2000336590A (ja) * 1999-05-27 2000-12-05 Oji Paper Co Ltd 古紙パルプ配合クラフト紙
US6572736B2 (en) * 2000-10-10 2003-06-03 Atlas Roofing Corporation Non-woven web made with untreated clarifier sludge
SE518577C2 (sv) * 2000-12-08 2002-10-29 Real Sverige Ab M Förfarande för framställning av papper med konstant fyllmedelsinnehåll
DE10107448A1 (de) * 2001-02-16 2002-08-22 Voith Paper Patent Gmbh Verfahren und Vorrichtung zum Beladen von in einer Faserstoffsuspension enthaltenen Fasern mit einem Füllstoff
JP2003293277A (ja) * 2002-03-29 2003-10-15 Nippon Paper Industries Co Ltd 再生パルプ製造方法
JP4063100B2 (ja) * 2003-02-13 2008-03-19 王子製紙株式会社 抄紙機の制御方法、制御装置、プログラム及び記憶媒体
JP2005002523A (ja) * 2003-06-13 2005-01-06 Oji Paper Co Ltd 中性抄紙方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006076977A2 *

Also Published As

Publication number Publication date
DE102005002638A1 (de) 2006-07-27
KR20070103436A (ko) 2007-10-23
WO2006076977A3 (fr) 2006-12-14
WO2006076977A2 (fr) 2006-07-27
JP2008528814A (ja) 2008-07-31

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