EP0349860A2 - Procédé de commande de l'addition d'agent de rétention lors de la fabrication du papier - Google Patents

Procédé de commande de l'addition d'agent de rétention lors de la fabrication du papier Download PDF

Info

Publication number
EP0349860A2
EP0349860A2 EP89111530A EP89111530A EP0349860A2 EP 0349860 A2 EP0349860 A2 EP 0349860A2 EP 89111530 A EP89111530 A EP 89111530A EP 89111530 A EP89111530 A EP 89111530A EP 0349860 A2 EP0349860 A2 EP 0349860A2
Authority
EP
European Patent Office
Prior art keywords
retention
flocculation
values
addition
degree
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Withdrawn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
EP89111530A
Other languages
German (de)
English (en)
Other versions
EP0349860A3 (fr
Inventor
Ralf Hemel
Jaroslav Melzer
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of EP0349860A2 publication Critical patent/EP0349860A2/fr
Publication of EP0349860A3 publication Critical patent/EP0349860A3/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • D21H23/12—Controlling the addition by measuring properties of the formed web
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/09—Uses for paper making sludge
    • Y10S162/10—Computer control of paper making variables
    • Y10S162/11—Wet end paper making variables

Definitions

  • the invention relates to a method for controlling the addition of retention aid in papermaking.
  • the paper produced be as uniform as possible, i.e. H. has a good formation.
  • the retention and flocculant addition increases. This means that with the control mentioned above, the retention values at which the formation is still acceptable must first be found by preliminary tests. They are then used as setpoints for the control.
  • the formation is still dependent on the respective paper stock composition, so that this setting must be carried out for each type of paper running on the paper machine. But even then it is still not certain whether a good formation will be achieved since fluctuations in the quality of the raw materials used cannot be recorded.
  • the degree of flocculation of the pulp suspension is first measured in the paper machine.
  • the retention is measured with the known systems described above, the degree of flocculation also with known systems, for example with a flocculation sensor according to EP-A-01 57 310.
  • the computer continuously receives measurement data of the variable pulp values or quantities, so that for a setpoint value to be entered for the degree of flocculation, namely the maximum permissible degree of flocculation (Y2), the maximum quantity of the variable material components (X i ... X n ) can be determined.
  • Control signals for metering devices, for example metering pumps, of these components are then derived from the quantity values.
  • the retention (Y1) depends on the variable pulp values (X1 ... X n ), so that there is an optimal combination of the addition quantities of the variable material components influencing the retention, in which there is a setpoint for the degree of flocculation sets a maximum retention.
  • the quantity values of these variable components (X i ... X n ) in the instantaneous setting of the paper stock values (X 1 ... X i-1 ) are varied in such a way that a combination of the values is found in which both the equation (II) for the setpoint of the Degree of flocculation (Y2) is met, and a maximum retention (Y1) of the pulp according to equation (I) is achieved.
  • the control signals for the corresponding metering devices for the variable substance components are in turn derived from the quantity values obtained in this way.

Landscapes

  • Paper (AREA)
EP19890111530 1988-07-06 1989-06-24 Procédé de commande de l'addition d'agent de rétention lors de la fabrication du papier Withdrawn EP0349860A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3822783 1988-07-06
DE3822783A DE3822783A1 (de) 1988-07-06 1988-07-06 Verfahren zur steuerung der retentionsmittelzugabe bei der papierherstellung

Publications (2)

Publication Number Publication Date
EP0349860A2 true EP0349860A2 (fr) 1990-01-10
EP0349860A3 EP0349860A3 (fr) 1991-05-22

Family

ID=6358029

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890111530 Withdrawn EP0349860A3 (fr) 1988-07-06 1989-06-24 Procédé de commande de l'addition d'agent de rétention lors de la fabrication du papier

Country Status (5)

Country Link
US (1) US4952280A (fr)
EP (1) EP0349860A3 (fr)
JP (1) JPH0247386A (fr)
DE (1) DE3822783A1 (fr)
FI (1) FI893232A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001055501A1 (fr) * 2000-01-26 2001-08-02 Voith Paper Patent Gmbh Procede pour determiner un parametre pour le potentiel des forces de liaison de fibres de papier en suspension, et application du procede

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4237309A1 (fr) * 1992-11-05 1993-04-08 Voith Gmbh J M
SE503386C2 (sv) * 1994-09-30 1996-06-03 Skogsind Tekn Foskningsinst Förfarande vid bestämning av mängden fyllmedel i papper
US6114171A (en) * 1997-10-20 2000-09-05 Westvaco Corporation Additive management system
FI103822B1 (fi) 1998-06-16 1999-09-30 Valmet Corp Menetelmä flokkisuuden optimoimiseksi
US6363610B1 (en) 1999-10-21 2002-04-02 Allied Signal, Inc. Gas turbine rotor bimetallic ring seal and method therefor
DE10118508A1 (de) * 2001-04-12 2002-10-17 Voith Paper Patent Gmbh Verfahren und Anlage zur Herstellung einer Faserstoffbahn
FI116241B (fi) * 2002-05-06 2005-10-14 Metso Automation Oy Menetelmä ja laitteisto paperikoneen viiraosan retention määrittämiseksi

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987002396A1 (fr) * 1985-10-18 1987-04-23 Miami University Procede de fabrication de papier

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987002396A1 (fr) * 1985-10-18 1987-04-23 Miami University Procede de fabrication de papier

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PAPIER, DAS. vol. 40, no. 10A, Oktober 1986, DARMSTADT DE Seiten 62 - 67; D. HORAND ET AL: "OPTIMIERUNG VON PAPIER- UND KARTONREZEPTUREN" *
TA-A- (CHIGAGO) 11-13, 1988 CONTINUOUS RETENTION MONITORING SYSTEM....KORTELAINEN H. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001055501A1 (fr) * 2000-01-26 2001-08-02 Voith Paper Patent Gmbh Procede pour determiner un parametre pour le potentiel des forces de liaison de fibres de papier en suspension, et application du procede
US6746572B2 (en) 2000-01-26 2004-06-08 Voith Paper Patent Gmbh Method for determining a characteristic value for the binding force potential of suspended paper fibers and use of this method

Also Published As

Publication number Publication date
DE3822783A1 (de) 1990-01-11
FI893232A (fi) 1990-01-07
FI893232A0 (fi) 1989-07-03
US4952280A (en) 1990-08-28
EP0349860A3 (fr) 1991-05-22
JPH0247386A (ja) 1990-02-16

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