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WO1999001612A1 - Procede permettant de minimiser l'utilisation d'eau dans un circuit d'eau d'une fabrique de papier, de cellulose ou de bois - Google Patents

Procede permettant de minimiser l'utilisation d'eau dans un circuit d'eau d'une fabrique de papier, de cellulose ou de bois Download PDF

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Publication number
WO1999001612A1
WO1999001612A1 PCT/EP1998/004047 EP9804047W WO9901612A1 WO 1999001612 A1 WO1999001612 A1 WO 1999001612A1 EP 9804047 W EP9804047 W EP 9804047W WO 9901612 A1 WO9901612 A1 WO 9901612A1
Authority
WO
WIPO (PCT)
Prior art keywords
measurement
regulated
paper
water
concentration
Prior art date
Application number
PCT/EP1998/004047
Other languages
German (de)
English (en)
Inventor
Johannes Kappel
Original Assignee
Andritz-Patentverwaltungs-Gesellschaft Mbh
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 Andritz-Patentverwaltungs-Gesellschaft Mbh filed Critical Andritz-Patentverwaltungs-Gesellschaft Mbh
Priority to AU88049/98A priority Critical patent/AU8804998A/en
Publication of WO1999001612A1 publication Critical patent/WO1999001612A1/fr

Links

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
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • 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

Definitions

  • the invention relates to a method for minimizing the use of water by regulating the concentration of contaminants in a water cycle of a paper / pulp or wood pulp mill.
  • EP 0 728 864 proposes a control strategy for wastewater-free pulp factories.
  • the aim of the invention is to minimize the use of fresh water in a paper and fiber mill by regulating the concentration of contaminants in the water circuits.
  • the invention is therefore characterized in that the concentration of impurities is measured either in the paper machine circuit and / or in a filtrate circuit, preferably in the last filtrate circuit, of a strand of material and the discharge of impurities is regulated.
  • a favorable further development of the invention is characterized in that the fresh water supply is regulated.
  • An advantageous embodiment of the invention is characterized in that the measurement of the impurity concentration is carried out by means of IR spectroscopy, automatic charge titration, turbidity measurement, measurement of the cationic requirement or COD measurement.
  • An advantageous development of the invention is characterized in that process parameters such as bleaching conditions and / or the use of chemicals are regulated.
  • a favorable embodiment of the method according to the invention is characterized in that system parameters such as dry contents of the presses are regulated.
  • a favorable development of the invention is characterized in that the proportions of the individual substances are varied in the case of several strands of material.
  • An advantageous embodiment of the invention is characterized in that the proportion of the committee is regulated.
  • FIG. 1 shows a block diagram of a customary integrated pulp and paper mill
  • FIG. 2 shows an analog block diagram according to the invention.
  • FIG. 1 the block diagram of an integrated pulp and paper factory is shown, in which the pulp (wood or waste paper) in 1 a first circuit (2) after the exposure of the fibers and subsequently a second circuit 3 and further circuits X ( 4) is supplied. The pulp is then fed into a paper machine 5 and as paper 6 it leaves the factory.
  • Fresh water 7 is usually used on the paper machine 5 and the filtrates are passed in countercurrent to the fibrous material via lines 8, 9 and 10, whereby the highest possible concentration of impurities is achieved.
  • the discharge takes place via line 11 in the first circuit 2.
  • additional discharges, not shown, or fresh water additions are possible.
  • one or more paper machines 5 can be supplied by one or more strands 1.
  • FIG. 2 now shows an analog block diagram to FIG. 1, in which the use of the optimization system 12 is clearly recognizable.
  • the concentration of impurities is measured using a measuring device 13, preferably by IR spectrography, for example in the filtrate circuit 8 of the paper machine measured.
  • the impurity concentration in the filtrate circuit 9 of one or more of the circuits X (4) is measured by means of a measuring device 14.
  • the optimization system which can have fuzzy logic, for example, regulates the fresh water supply 7 and thus the removal of impurities via a valve 15, which can alternatively be regulated via a valve 16. If the countercurrent flow is not complete, the fresh water supply or discharge can also take place at other points. But it can also the process parameters of the circuits, for. B. bleaching conditions, use of chemicals via control lines 17, 17 'and / or the system parameters such as dry contents of presses via control lines 18, 18' can be influenced by the optimization system 12.
  • the proportions of the individual substances can also be varied so as not to exceed the permissible impurity concentrations on the paper machine.
  • the proportion of the use of the self-committee can be regulated within certain limits. If a circuit water purification stage is installed, this can also be regulated by the optimization system.

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  • Paper (AREA)

Abstract

L'invention concerne un procédé de minimisation de l'utilisation d'eau par régulation de la concentration en substances parasites dans un circuit d'eau d'une fabrique de papier, de cellulose ou de bois. Cette invention se caractérise notamment en ce que la concentration en substances parasites est mesurée dans le circuit des machines à papier (8) et/ou dans un circuit de filtration, de préférence dans le dernier circuit de filtration (9) d'un flux de matières (13, 14) et que l'évacuation (11) vers l'extérieur des substances parasites est régulée (16).
PCT/EP1998/004047 1997-07-01 1998-07-01 Procede permettant de minimiser l'utilisation d'eau dans un circuit d'eau d'une fabrique de papier, de cellulose ou de bois WO1999001612A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU88049/98A AU8804998A (en) 1997-07-01 1998-07-01 Method for minimizing water use in a water circuit in a paper, cellulose or woodfactory

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT112197A AT405061B (de) 1997-07-01 1997-07-01 Verfahren zur minimierung des wassereinsatzes in einem wasserkreislauf einer papier-/zellstoff- oder holzstofffabrik
ATA1121/97 1997-07-01

Publications (1)

Publication Number Publication Date
WO1999001612A1 true WO1999001612A1 (fr) 1999-01-14

Family

ID=3507045

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/004047 WO1999001612A1 (fr) 1997-07-01 1998-07-01 Procede permettant de minimiser l'utilisation d'eau dans un circuit d'eau d'une fabrique de papier, de cellulose ou de bois

Country Status (3)

Country Link
AT (1) AT405061B (fr)
AU (1) AU8804998A (fr)
WO (1) WO1999001612A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001027383A1 (fr) * 1999-10-12 2001-04-19 Der Grüne Punkt - Duales System Deutschland Ag Procede pour minimiser l'utilisation d'eau d'apport dans un circuit d'eau faisant partie d'une installation de traitement

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4752356A (en) * 1985-10-18 1988-06-21 Miami University Papermaking process
US4758308A (en) * 1985-03-05 1988-07-19 Carr Wayne F System for monitoring contaminants with a detector in a paper pulp stream
WO1992017642A1 (fr) * 1991-04-08 1992-10-15 Oy Keskuslaboratorio - Centrallaboratorium Ab Diagnostic des perturbations de la chimie de la section humide d'une machine a papier
EP0627522A1 (fr) * 1993-05-26 1994-12-07 Degussa Aktiengesellschaft Procédé amélioré pour le blanchiment de pâtes à papier mécaniques
WO1995008019A1 (fr) * 1993-09-16 1995-03-23 Siemens Aktiengesellschaft Dispositif d'exploitation d'une installation de production de pate de cellulose desencree avec des analyseurs de l'etat de la suspension de vieux papiers constitues de reseaux neuraux
EP0728864A2 (fr) * 1993-03-02 1996-08-28 Kamyr Inc. Gestion en cascade des eaux dans une usine sans rejet de fabrication de pâte à papier

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5174859A (en) * 1990-04-11 1992-12-29 Hpd Incorporated Method for treating mechanical pulp plant effluent

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4758308A (en) * 1985-03-05 1988-07-19 Carr Wayne F System for monitoring contaminants with a detector in a paper pulp stream
US4752356A (en) * 1985-10-18 1988-06-21 Miami University Papermaking process
WO1992017642A1 (fr) * 1991-04-08 1992-10-15 Oy Keskuslaboratorio - Centrallaboratorium Ab Diagnostic des perturbations de la chimie de la section humide d'une machine a papier
EP0728864A2 (fr) * 1993-03-02 1996-08-28 Kamyr Inc. Gestion en cascade des eaux dans une usine sans rejet de fabrication de pâte à papier
EP0627522A1 (fr) * 1993-05-26 1994-12-07 Degussa Aktiengesellschaft Procédé amélioré pour le blanchiment de pâtes à papier mécaniques
WO1995008019A1 (fr) * 1993-09-16 1995-03-23 Siemens Aktiengesellschaft Dispositif d'exploitation d'une installation de production de pate de cellulose desencree avec des analyseurs de l'etat de la suspension de vieux papiers constitues de reseaux neuraux

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
STETTER, A. ET AL: "Erfahrungen mit Mess- und Regelanlagen im Kreislauf der Altpapieraufbereitung", WOCHENBL. PAPIERFABR. 121, NR. 23/24: 1018-1023 (DEZEMBER 15, 1993), XP002084075 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001027383A1 (fr) * 1999-10-12 2001-04-19 Der Grüne Punkt - Duales System Deutschland Ag Procede pour minimiser l'utilisation d'eau d'apport dans un circuit d'eau faisant partie d'une installation de traitement
US6767463B1 (en) 1999-10-12 2004-07-27 Der Grune Punkt-Duales System Deutschland Ag Method for minimizing the new water use in the water circulation system of a treatment plant

Also Published As

Publication number Publication date
AU8804998A (en) 1999-01-25
ATA112197A (de) 1998-09-15
AT405061B (de) 1999-05-25

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