AU7045998A - 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 - Google Patents
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 machineInfo
- Publication number
- AU7045998A AU7045998A AU70459/98A AU7045998A AU7045998A AU 7045998 A AU7045998 A AU 7045998A AU 70459/98 A AU70459/98 A AU 70459/98A AU 7045998 A AU7045998 A AU 7045998A AU 7045998 A AU7045998 A AU 7045998A
- Authority
- AU
- Australia
- Prior art keywords
- paper
- web
- drying
- stage
- machine
- 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.)
- Abandoned
Links
- 238000001035 drying Methods 0.000 title abstract 6
- 238000001704 evaporation Methods 0.000 title abstract 5
- 230000008020 evaporation Effects 0.000 title abstract 5
- 238000000034 method Methods 0.000 title abstract 4
- 239000007787 solid Substances 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
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.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI971714 | 1997-04-22 | ||
| 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 |
| 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 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU7045998A true AU7045998A (en) | 1998-11-13 |
Family
ID=8548699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU70459/98A Abandoned 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 |
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) |
Families Citing this family (3)
| 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 |
| FI124218B (en) | 2007-01-22 | 2014-05-15 | Valmet Technologies Inc | System in a drying section of a web forming machine for controlling the wire and further web by directional rollers |
Family Cites Families (3)
| 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 |
| WO1989004890A1 (en) * | 1987-11-26 | 1989-06-01 | Valmet Oy | Method and device in on-machine coating-drying of a paper web or equivalent |
| FI102623B1 (en) * | 1995-10-04 | 1999-01-15 | Valmet Corp | Procedure and apparatus in a paper machine |
-
1997
- 1997-04-22 FI FI971714A patent/FI971714A/en unknown
-
1998
- 1998-04-21 AU AU70459/98A patent/AU7045998A/en not_active Abandoned
- 1998-04-21 CA CA002287355A patent/CA2287355C/en not_active Expired - Fee Related
- 1998-04-21 EP EP98917149A patent/EP1012386B1/en not_active Expired - Lifetime
- 1998-04-21 AT AT98917149T patent/ATE315123T1/en not_active IP Right Cessation
- 1998-04-21 JP JP54509598A patent/JP3604704B2/en not_active Expired - Fee Related
- 1998-04-21 DE DE69833107T patent/DE69833107T2/en not_active Expired - Lifetime
- 1998-04-21 WO PCT/FI1998/000351 patent/WO1998048107A1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| CA2287355A1 (en) | 1998-10-29 |
| FI971714A0 (en) | 1997-04-22 |
| DE69833107T2 (en) | 2006-08-17 |
| JP3604704B2 (en) | 2004-12-22 |
| DE69833107D1 (en) | 2006-03-30 |
| WO1998048107A1 (en) | 1998-10-29 |
| ATE315123T1 (en) | 2006-02-15 |
| EP1012386B1 (en) | 2006-01-04 |
| JP2001504175A (en) | 2001-03-27 |
| EP1012386A1 (en) | 2000-06-28 |
| FI971714A (en) | 1998-10-23 |
| CA2287355C (en) | 2007-03-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK6 | Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase |