FI990806A7 - Vacuum level control method for suction roll(s) in a paper machine/board machine - Google Patents

Vacuum level control method for suction roll(s) in a paper machine/board machine Download PDF

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Publication number
FI990806A7
FI990806A7 FI990806A FI990806A FI990806A7 FI 990806 A7 FI990806 A7 FI 990806A7 FI 990806 A FI990806 A FI 990806A FI 990806 A FI990806 A FI 990806A FI 990806 A7 FI990806 A7 FI 990806A7
Authority
FI
Finland
Prior art keywords
roll
web
pick
suction
vacuum
Prior art date
Application number
FI990806A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI990806L (en
FI990806A0 (en
Inventor
Jorma Laapotti
ANTTI SUONPERä
Heikki Ilvespää
Original Assignee
Metso Paper Inc
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 Metso Paper Inc filed Critical Metso Paper Inc
Priority to FI990806A priority Critical patent/FI990806A7/en
Publication of FI990806A0 publication Critical patent/FI990806A0/en
Priority to DE10084416T priority patent/DE10084416T1/en
Priority to AU39676/00A priority patent/AU3967600A/en
Priority to PCT/FI2000/000301 priority patent/WO2000061862A1/en
Publication of FI990806L publication Critical patent/FI990806L/en
Publication of FI990806A7 publication Critical patent/FI990806A7/en

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F2/00—Transferring continuous webs from wet ends to press sections

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  • Paper (AREA)

Abstract

Keksinnön kohteena on imutelan/telojen alipainetason ohjausmenetelmä paperikoneessa/kartonkikoneessa, jossa raina (W) johdetaan märkäviiralta (Ho) pick-up-telan (11) kautta puristinosalle (100). Menetelmässä rainaa (W) kuljetetaan puristinosan puristintelojen välisten nippien (N1, N2) kautta eteenpäin ja edelleen kuivatusosalle (200). Laitejärjestelyssä käytetään nostettavaa ja laskettavaa pick-up-telaa (11), joka on imutela, jonka telavaippa on rei'itetty ja joka käsittää sisäpuolisen imulaatikon (40), jonka avulla muodostetaan imuvyöhyke (D1), jolloin liikuttamalla pick-up-tela (11) kiinni märkäviiralla (Ho) pulpperiin siirrettyyn rainaan (W) siirretään raina (W) pick-up-telan (11) aikaansaaman alipainekiinnityksen avulla kuivatusosalle (100) kuivatushuovan (H1) yhteyteen. Menetelmässä ohjataan pick-up-telan (11) imuvyöhykkeeseen (D1) aikaansaatua alipainetta säätämällä alipaineen aikaansaavan kierrosnopeudeltaan säädettävän alipainepumpun (10a1) kierrosnopeutta. Menetelmässä alipainepumpun (10a1) kierrosnopeutta lisätään siinä vaiheessa, kun pick-up-tela (11) siirretään märkäviiralla (Ho) olevan rainan (W) yhteyteen sen siirtämiseksi puristinosalle.The invention relates to a method for controlling the vacuum level of the suction roll/rolls in a paper machine/board machine, in which the web (W) is guided from the wet wire (Ho) via a pick-up roll (11) to the press section (100). In the method, the web (W) is transported forward via the nips (N1, N2) between the press rolls of the press section and further to the drying section (200). The device arrangement uses a liftable and lowerable pick-up roll (11), which is a suction roll whose roll jacket is perforated and which comprises an internal suction box (40), by means of which a suction zone (D1) is formed, whereby by moving the pick-up roll (11) close to the web (W) transferred to the pulper via the wet wire (Ho), the web (W) is transferred to the drying section (100) in connection with the drying felt (H1). The method controls the vacuum created in the suction zone (D1) of the pick-up roll (11) by adjusting the rotation speed of a variable-speed vacuum pump (10a1) that creates the vacuum. In the method, the rotation speed of the vacuum pump (10a1) is increased at the stage when the pick-up roll (11) is moved to the web (W) on the wet wire (Ho) in order to transfer it to the press section.

FI990806A 1999-04-13 1999-04-13 Vacuum level control method for suction roll(s) in a paper machine/board machine FI990806A7 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FI990806A FI990806A7 (en) 1999-04-13 1999-04-13 Vacuum level control method for suction roll(s) in a paper machine/board machine
DE10084416T DE10084416T1 (en) 1999-04-13 2000-04-11 Method for regulating the pressure vacuum level in a suction roll or rolls in a paper / board making machine
AU39676/00A AU3967600A (en) 1999-04-13 2000-04-11 Method for controlling the pressure level of vacuum of a suction roll or rolls in a paper/boardmaking machine
PCT/FI2000/000301 WO2000061862A1 (en) 1999-04-13 2000-04-11 Method for controlling the pressure level of vacuum of a suction roll or rolls in a paper/boardmaking machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI990806A FI990806A7 (en) 1999-04-13 1999-04-13 Vacuum level control method for suction roll(s) in a paper machine/board machine

Publications (3)

Publication Number Publication Date
FI990806A0 FI990806A0 (en) 1999-04-13
FI990806L FI990806L (en) 2000-10-14
FI990806A7 true FI990806A7 (en) 2000-10-14

Family

ID=8554401

Family Applications (1)

Application Number Title Priority Date Filing Date
FI990806A FI990806A7 (en) 1999-04-13 1999-04-13 Vacuum level control method for suction roll(s) in a paper machine/board machine

Country Status (4)

Country Link
AU (1) AU3967600A (en)
DE (1) DE10084416T1 (en)
FI (1) FI990806A7 (en)
WO (1) WO2000061862A1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398996A (en) * 1981-06-19 1983-08-16 Albany International Corp. Vacuum control system and method for dewatering fabrics
US5639351A (en) * 1991-12-23 1997-06-17 Valmet Corporation Press section of a paper machine, in particular for printing paper qualities

Also Published As

Publication number Publication date
WO2000061862A1 (en) 2000-10-19
FI990806L (en) 2000-10-14
FI990806A0 (en) 1999-04-13
DE10084416T1 (en) 2002-06-20
AU3967600A (en) 2000-11-14

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