WO2011064458A3 - Method and arrangement for controlling a screening process - Google Patents

Method and arrangement for controlling a screening process Download PDF

Info

Publication number
WO2011064458A3
WO2011064458A3 PCT/FI2010/050973 FI2010050973W WO2011064458A3 WO 2011064458 A3 WO2011064458 A3 WO 2011064458A3 FI 2010050973 W FI2010050973 W FI 2010050973W WO 2011064458 A3 WO2011064458 A3 WO 2011064458A3
Authority
WO
WIPO (PCT)
Prior art keywords
screen
pulp
accept
reject
rotational speed
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.)
Ceased
Application number
PCT/FI2010/050973
Other languages
French (fr)
Other versions
WO2011064458A2 (en
Inventor
Petri Harju
Sami Siik
Jussi Pakarinen
Pasi HEINÄMÄKI
Simo Kiero
Risto Ljokkoi
Hannu Rönkönharju
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.)
Andritz Oy
Original Assignee
Andritz Oy
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 Oy filed Critical Andritz Oy
Publication of WO2011064458A2 publication Critical patent/WO2011064458A2/en
Publication of WO2011064458A3 publication Critical patent/WO2011064458A3/en
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • D21D5/02—Straining or screening the pulp
    • 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
    • D21D5/02—Straining or screening the pulp
    • D21D5/023—Stationary screen-drums
    • D21D5/026—Stationary screen-drums with rotating cleaning foils
    • 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
    • D21D5/02—Straining or screening the pulp
    • D21D5/06—Rotary screen-drums

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

The present invention relates to a method and arrangement for regulating a screening process and/or a screen by means of an automatic system during screening of fiber suspension in a screening apparatus having a screen drum for dividing the fiber suspension into reject and accept and a rotor. The driving power for the rotor or screen drum is an electric motor, the rotational speed of which is regulated by means of a frequency converter based on pulp, machine and running parameters. The pulp and/or running parameters of the screen are measured and for each screen is determined a functional dependence of an operational value on the rotational speed with respect to the pulp parameter and/or running parameter based on the measurement results, when the operational value is motor input power, torque, accept flow pressure, reject flow pressure, pressure difference, reject and/or accept consistency. The rotational speed is adjusted anticipatorily according to these dependences by means of the automatic system so that the screen operates within an optimal operational value range that is determined based on said dependence.
PCT/FI2010/050973 2009-11-30 2010-11-29 Method and arrangement for controlling a screening room Ceased WO2011064458A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20090455 2009-11-30
FI20090455A FI20090455A7 (en) 2009-11-30 2009-11-30 Method for adjusting the sorting plant

Publications (2)

Publication Number Publication Date
WO2011064458A2 WO2011064458A2 (en) 2011-06-03
WO2011064458A3 true WO2011064458A3 (en) 2011-07-28

Family

ID=41395182

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2010/050973 Ceased WO2011064458A2 (en) 2009-11-30 2010-11-29 Method and arrangement for controlling a screening room

Country Status (2)

Country Link
FI (1) FI20090455A7 (en)
WO (1) WO2011064458A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4293157A3 (en) 2017-09-18 2024-06-05 International Paper Company Method for controlling a fiber fractionation system
DE102019116197A1 (en) * 2019-06-14 2020-12-17 Voith Patent Gmbh Soiling measurement suction roll

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2035824A (en) * 1978-11-17 1980-06-25 Wikdahl L Fibre-suspension screen apparatus
GB1584715A (en) * 1976-06-03 1981-02-18 Tampella Oy Ab Method and apparatus for classifying a suspension
WO1993025752A1 (en) * 1992-06-05 1993-12-23 Sunds Defibrator Industries Aktiebolag Screening of pulp

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8106985L (en) 1981-11-24 1983-05-25 Nils Anders Lennart Wikdahl KEEP PREVENTING THE COMPOSITION OF A SILORGAN IN THE SILVERING OF A FIBER SUSPENSION
FI77279C (en) 1987-04-30 1989-02-10 Ahlstroem Oy FOERFARANDE OCH ANORDNING FOER BEHANDLING AV FIBERSUSPENSION.
US6165370A (en) 1998-01-21 2000-12-26 Voith Sulzer Paper Technology North America, Inc. Pressure screen monitoring apparatus and method
SE0303260D0 (en) 2003-12-04 2003-12-04 Metso Paper Inc Screening apparatus for screening pulp suspensions with monitoring means
FI120913B (en) 2007-09-28 2010-04-30 Andritz Oy Device for sorting of pulp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1584715A (en) * 1976-06-03 1981-02-18 Tampella Oy Ab Method and apparatus for classifying a suspension
GB2035824A (en) * 1978-11-17 1980-06-25 Wikdahl L Fibre-suspension screen apparatus
WO1993025752A1 (en) * 1992-06-05 1993-12-23 Sunds Defibrator Industries Aktiebolag Screening of pulp

Also Published As

Publication number Publication date
FI20090455A (en) 2011-05-31
FI20090455A7 (en) 2011-05-31
WO2011064458A2 (en) 2011-06-03
FI20090455A0 (en) 2009-11-30

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