FI971714A - Procedure for optimizing the paper evaporation drying, driveability and quality, and drying portion applying the procedure in a paper machine - Google Patents

Procedure for optimizing the paper evaporation drying, driveability and quality, and drying portion applying the procedure in a paper machine Download PDF

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Publication number
FI971714A
FI971714A FI971714A FI971714A FI971714A FI 971714 A FI971714 A FI 971714A FI 971714 A FI971714 A FI 971714A FI 971714 A FI971714 A FI 971714A FI 971714 A FI971714 A FI 971714A
Authority
FI
Finland
Prior art keywords
web
paper
drying
stage
procedure
Prior art date
Application number
FI971714A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI971714A0 (en
Inventor
Juha Lipponen
Martti Salminen
Juha Kaihovirta
Reima Kerttula
Original Assignee
Valmet Corp
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 Valmet Corp filed Critical Valmet Corp
Priority to FI971714A priority Critical patent/FI971714A/en
Publication of FI971714A0 publication Critical patent/FI971714A0/en
Priority to EP98917149A priority patent/EP1012386B1/en
Priority to DE69833107T priority patent/DE69833107T2/en
Priority to CA002287355A priority patent/CA2287355C/en
Priority to AT98917149T priority patent/ATE315123T1/en
Priority to PCT/FI1998/000351 priority patent/WO1998048107A1/en
Priority to JP54509598A priority patent/JP3604704B2/en
Priority to AU70459/98A priority patent/AU7045998A/en
Priority to US09/064,660 priority patent/US6003245A/en
Publication of FI971714A publication Critical patent/FI971714A/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders

Landscapes

  • Paper (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

A method and an equipment for evaporation drying of the paper web that comes from the press section (10) of a paper machine. The method consists of three successive stages I, II and III that are carried out in the direction of progress of the web (W) as follows: (I) in the first stage, the paper web coming from the press section (10) of the paper machine is heated in a short section (L1) of the paper machine in the machine direction quickly to a temperature of 55...85 DEG C, and web breaks of the relatively moist and, thus, weak web (W) are minimized; (II) after the first stage (I), the main evaporation drying of the web (W) is carried out so that the evaporation efficiency (PE) and the rate of increase in the dry solids content (KA) of the web (W) are substantially higher than in the first stage or in the final stage (III), and the web temperature (TW) does substantially not rise while the drying proceeds (Fig. 4); (III) in the final stage, the drying is continued with a decreasing evaporation efficiency (Fig. 3) and with such an average rate of increase in the dry solids content (KA) of the web (W) in the machine direction as is lower than in the preceding stage (II) but higher than in a conventional cylinder drying with single-wire draw so that the paper quality can be controlled at the same time.
FI971714A 1997-04-22 1997-04-22 Procedure for optimizing the paper evaporation drying, driveability and quality, and drying portion applying the procedure in a paper machine FI971714A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
FI971714A FI971714A (en) 1997-04-22 1997-04-22 Procedure for optimizing the paper evaporation drying, driveability and quality, and drying portion applying the procedure in a paper machine
EP98917149A EP1012386B1 (en) 1997-04-22 1998-04-21 Method for optimizing evaporation drying of paper, runnability, and paper quality as well as dryer section that makes use of the method in a paper machine
DE69833107T DE69833107T2 (en) 1997-04-22 1998-04-21 METHOD FOR OPTIMIZING EVAPORATIVE DRYING OF PAPER, SPEED, AND PAPER QUALITY, AND A DRY PART OF A PAPER MACHINE FOR CARRYING OUT THE METHOD
CA002287355A CA2287355C (en) 1997-04-22 1998-04-21 Method for optimizing evaporation drying of paper, runnability, and paper quality as well as dryer section that makes use of the method in a paper machine
AT98917149T ATE315123T1 (en) 1997-04-22 1998-04-21 METHOD FOR OPTIMIZING EVAPORATION DRYING OF PAPER, SPEED AND PAPER QUALITY AND A DRYING SECTION OF A PAPER MACHINE FOR CARRYING OUT THE PROCESS
PCT/FI1998/000351 WO1998048107A1 (en) 1997-04-22 1998-04-21 Method for optimizing evaporation drying of paper, runnability, and paper quality as well as dryer section that makes use of the method in a paper machine
JP54509598A JP3604704B2 (en) 1997-04-22 1998-04-21 Method for optimizing evaporative drying of paper, runnability, and paper quality and drying section of paper machine using the method
AU70459/98A AU7045998A (en) 1997-04-22 1998-04-21 Method for optimizing evaporation drying of paper, runnability, and paper quality as well as dryer section that makes use of the method in a paper machine
US09/064,660 US6003245A (en) 1997-04-22 1998-04-22 Method for optimizing of evaporation drying of paper, runnability, and of paper quality as well as dryer section that makes use of the method in a paper machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI971714A FI971714A (en) 1997-04-22 1997-04-22 Procedure for optimizing the paper evaporation drying, driveability and quality, and drying portion applying the procedure in a paper machine

Publications (2)

Publication Number Publication Date
FI971714A0 FI971714A0 (en) 1997-04-22
FI971714A true FI971714A (en) 1998-10-23

Family

ID=8548699

Family Applications (1)

Application Number Title Priority Date Filing Date
FI971714A FI971714A (en) 1997-04-22 1997-04-22 Procedure for optimizing the paper evaporation drying, driveability and quality, and drying portion applying the procedure in a paper machine

Country Status (8)

Country Link
EP (1) EP1012386B1 (en)
JP (1) JP3604704B2 (en)
AT (1) ATE315123T1 (en)
AU (1) AU7045998A (en)
CA (1) CA2287355C (en)
DE (1) DE69833107T2 (en)
FI (1) FI971714A (en)
WO (1) WO1998048107A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112008000162T5 (en) 2007-01-22 2009-12-10 Metso Paper, Inc. System in a dryer section of a web forming machine for guiding a screen and further the web with guide rollers

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI105217B (en) * 1998-12-04 2000-06-30 Valmet Corp A method for controlling the drying process of a papermaking machine or the like in a drying section
FI111970B (en) * 1998-12-04 2003-10-15 Metso Paper Inc A method and apparatus for controlling the drying process of a papermaking machine or the like in a drying section

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3721734A1 (en) * 1987-07-01 1989-01-12 Voith Gmbh J M METHOD FOR DRYING A RUNNING TRAIN AND PAPER OR CARDBOARD MACHINE FOR CARRYING OUT THE METHOD
DE3791032T1 (en) * 1987-11-26 1990-03-15 Valmet Oy METHOD AND DEVICE FOR DRYING GRAVITY OF A PAPER RAIL OR THE LIKE IN THE MACHINE
FI102623B (en) * 1995-10-04 1999-01-15 Valmet Corp Method and apparatus in a paper machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112008000162T5 (en) 2007-01-22 2009-12-10 Metso Paper, Inc. System in a dryer section of a web forming machine for guiding a screen and further the web with guide rollers

Also Published As

Publication number Publication date
WO1998048107A1 (en) 1998-10-29
FI971714A0 (en) 1997-04-22
EP1012386A1 (en) 2000-06-28
AU7045998A (en) 1998-11-13
CA2287355A1 (en) 1998-10-29
DE69833107D1 (en) 2006-03-30
DE69833107T2 (en) 2006-08-17
CA2287355C (en) 2007-03-13
JP2001504175A (en) 2001-03-27
JP3604704B2 (en) 2004-12-22
EP1012386B1 (en) 2006-01-04
ATE315123T1 (en) 2006-02-15

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