EP1436459A1 - A method and a device for removing broke in a plant for drying of a web-formed material - Google Patents
A method and a device for removing broke in a plant for drying of a web-formed materialInfo
- Publication number
- EP1436459A1 EP1436459A1 EP02733752A EP02733752A EP1436459A1 EP 1436459 A1 EP1436459 A1 EP 1436459A1 EP 02733752 A EP02733752 A EP 02733752A EP 02733752 A EP02733752 A EP 02733752A EP 1436459 A1 EP1436459 A1 EP 1436459A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- web
- formed material
- housing
- drying
- press
- 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.)
- Granted
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
- D21G9/0063—Devices for threading a web tail through a paper-making machine
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
- D21F7/04—Paper-break control devices
Definitions
- the present invention relates to a method when cleaning, after a web break or the like, in a plant for drying of a web-formed material, preferably a pulp web or a paper web, comprising blow boxes arranged in a plurality of drying ' decks.
- the web-formed material is floating, in the drying deck, above lower blow boxes that, at their upper side, blow out hot process air towards the web-formed material, in order to dry the material .
- the web-formed material is pulled through the drying plant with the aid of a driven pair of rolls at the outlet.
- the turning rolls arranged between the drying decks are freely running during normal operation, but are provided with drives that are used, for example, when threading through the plant .
- the present invention also relates to a device for carrying out the method.
- Web-formed materials such as paper or pulp
- heated surfaces primarily cylinders.
- cylinder drying of a web-formed material for example paper
- the web-formed material is heated by heated cylinders against which the web-formed material is pressed by the web tension and/or with the aid of a felt or a wire.
- the web-formed material In contactless drying, the web-formed material is usually moved back and forth in a plurality of drying decks, floating above lower blow boxes that, at their upper side, blow out hot process air towards the web- formed material, in order to dry the material .
- the web- formed material is pulled through the drying plant with the aid of a driven pair of rolls, or the like, arranged at the outlet of the drying plant. Between the drying decks, the web-formed material changes its machine direction over the turning rolls, against which the web-formed material is pressed by the tension in the web only. During normal operation, these turning rolls are freely running. However, the turning rolls are provided with a drive system that is used, inter alia, when threading upon start-up.
- drying-,piant:s. are . therefore, enclosed, in casings of, for example, insulated panels, referred to below as housings, that are almost completely closed and where supply air and exhaust air are controlled such that any leakage through the openings of the housing, inter alia when feeding the paper web, or the like, in and out, passes from the outside and inwards.
- this housing When removing broke, in this context called cleaning of the drying plant, after for example a web break, this housing is, of course, an obstacle and conversely the housing must be adapted such that cleaning is possible at all and that manual cleaning may be performed in such an efficient and time-saving manner as possible.
- the present invention relates to a method when cleaning, after a web break or the like, in a plant for drying of a web-formed material, preferably a pulp web or a paper web, comprising blow boxes arranged in a plurality of drying decks.
- the web-formed material is floating above lower blow boxes that, at their upper side, blow out hot process air towards the web-formed material, in order to dry the material.
- Between the drying decks the web-formed material changes its machine direction when passing over the turning rolls, which are freely running during normal operation but which are driven during, for example, threading, against which the web-formed material is pressed by the tension in the web only.
- the web-formed material is pulled, during normal operation, through the .drying plant with the aid of a driven pair of rolls .or the like, arranged at the outlet.
- an opening is made in a housing enclosing the drying plant, such that at least one turning roll becomes accessible, and a press roller, a press wheel, or the like, is applied such that the web-formed material is pressed against this turning roll. Thereafter, the web-formed material is fed forwards by running the drive system of the turning rolls at a low speed, and the web-formed material is fed out of the housing through the opening.
- the present invention also relates to a device for carrying out the above method in a drying plant, with a housing that completely or essentially completely surrounds the drying plant .
- a device for carrying out the above method in a drying plant with a housing that completely or essentially completely surrounds the drying plant .
- the opening be chosen so as to be adapted to the position of the web break so that the desired forward feed can be performed in an efficient manner.
- the application of the press roller or the like is advantageously performed manually by one or more operators, but may also, within the scope of the invention, be performed by mechanical devices, for example by means of compressed-air cylinders .
- the web-formed material is fed forward by running the drive system of the turning rolls at a low speed.
- the press rollers or the like By the application of the press rollers or the like, a sufficient contact force between the turning roll and the web may be obtained, permitting the web to be pulled forward.
- the web-formed material is fed out of the housing through the opening.
- a lifting platform is advantageously arranged adjacent to the housing, so that operators may be lifted to the relevant level for performing the cleaning operation.
- the lifting platform so as to create a space between the wall of the housing and the lifting platform, the broke, the web-formed material remaining in the plant, may be allowed to fall essentially straight down close to the housing. There, it can be easily •,taken ,care of . - in, spite qf the,.fact that its length may be considerable.
- the method is repeated at two or more openings .
- Figure 1 schematically shows a detail of an embodiment suitable when using the method according to the invention
- Figure 2 schematically shows how an operator feeds out broke from a drying plant according to the proposed method
- Figure 3 schematically shows a detail of a second embodiment suitable when using the method according to the invention
- Figure 4 schematically shows how an operator feeds out broke from a drying plant according to a third proposed embodiment
- Figure 5 schematically shows a detail of a forth embodiment suitable when using the method according to the invention.
- FIG. 1 schematically shows part of a drying plant 1 for papermaking pulp.
- the drying plant 1 is enclosed in a housing 2 comprising a wall 2a.
- the wall 2a is provided with hatches 3 to enable access to the turning rolls 4 of the drying plant 1 through openings 3a.
- the press roller 5 is fixed to a tubular element 8 that, via a transverse element 9 and a joint 10, is connected to the support 6.
- the tubular element 8 is adapted to cooperate with a rod 11 or the like to extend the lever and hence increase the force by which the press roller 5 can be pressed against the turning roll 4 and the web of pulp 12 resting thereon.
- Figure 2 shows an operator 13 standing on a lifting platform 14 with a floor 14a and a railing 14b.
- the operator 13 lifts the rod 11 upwards and hence presses the press roller 5 against the turning roll 4 such that the pulp web 12 is fed out through the opening 3a.
- a partition 16 prevents the operator 13 from inadvertently treading into the space 15.
- Figure 3 schematically shows part of a drying plant 1 for pulp corresponding to that shown in Figure 1.
- the press roller 5 is fixed to one end of an element 8b that, at its other end, is influenced by a compressed-air cylinder 31 suspended from a support element 36 fixed to the wall 2a of the housing somewhat above the support 6.
- Figure 4 shows, like Figure 2, an operator 13 standing on a lifting platform 14 with a floor 14a and a railing 14b. However, in Figure 4 the operator 13 is provided with a movable device lie, at one end of which the press roller 5 is attached. With the movable device lie, the press roller 5 is pressed against the turning roll 4 by using the upper edge of the opening 3a, or a support arranged adjacent thereto, as a point of support.
- the movable device 11 is provided with support lugs 46 to enable the position of the press roller 5 to be fixed.
- Figure 5 schematically shows part of a drying plant 1 for pulp corresponding to that shown in Figure 1 and Figure 3. The difference is that the press roller 5 is fixed to one end of a first arm 59 that, at its other end, is connected to. a..joint 10 at a support 6.
- the press roller 5 is further, with a second arm -57 connected to the piston of a compressed-air cylinder 51 suspended in the wall 2a of the housing.
- the press rollers 5 are applied to the turning roll 4 and the web 12 is fed out through the relevant opening 3a.
- This can be made by first cutting off the web 12 at the turning roll 4, which implies that the remaining part of the web 12 that is situated below the level in question must be removed manually, or by feeding out part of the web 12, folded twice, through the opening 3a.
- the same method may possibly be applied to the other end of the drying plant 1 for removing what remains after the cutting of the web 12.
- the broke 12a is allowed to fall down through the space 15 and is taken care of, in an appropriate manner, at the floor of the hall.
- the invention is not, of course, limited to the embodiment described above, but may be varied in a plurality of ways within the scope of the following claims.
- the proposed method may be combined with a conventional broke removal nip, placed on that side of the lifting platform 14 that faces away from the housing 2, on the wall 14b.
- the press rollers 5 proposed are used only for feeding the web forward, in a simple and reliable manner, the distance that is needed across the lifting platform 14.
Landscapes
- Paper (AREA)
- Cleaning In General (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0102027 | 2001-06-08 | ||
SE0102027A SE519197C2 (en) | 2001-06-08 | 2001-06-08 | Process and apparatus for cleaning in a plant for drying a web-shaped material |
PCT/SE2002/001044 WO2002101143A1 (en) | 2001-06-08 | 2002-05-31 | A method and a device for removing broke in a plant for drying of a web-formed material |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1436459A1 true EP1436459A1 (en) | 2004-07-14 |
EP1436459B1 EP1436459B1 (en) | 2007-03-07 |
Family
ID=20284403
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02733752A Expired - Lifetime EP1436459B1 (en) | 2001-06-08 | 2002-05-31 | A method and a device for removing broke in a plant for drying of a web-formed material |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1436459B1 (en) |
CN (1) | CN1280479C (en) |
BR (1) | BR0210277B1 (en) |
SE (1) | SE519197C2 (en) |
WO (1) | WO2002101143A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI7064U1 (en) | 2005-01-31 | 2006-05-12 | Metso Paper Inc | Devices for removing a broken pulp web from a cell dryer and cell drying management platform |
FI118924B (en) * | 2005-12-05 | 2008-05-15 | Metso Paper Inc | Apparatus and method for removing a broken pulp web from a cell dryer |
SE535634C2 (en) | 2010-11-16 | 2012-10-23 | Andritz Tech & Asset Man Gmbh | Cellulose dryer having lower blow boxes and method of drying a web of cellulose pulp |
CN109811578A (en) * | 2019-03-21 | 2019-05-28 | 贵州赤天化纸业股份有限公司 | A kind of lever broken remover |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA896636A (en) * | 1968-12-27 | 1972-03-28 | C. Williams Stanley | Broke chamber |
SE7709332L (en) * | 1977-08-18 | 1979-02-19 | Svenska Flaektfabriken Ab | DEVICE AT A PLANT FOR DRYING A PREFERABLY A PANEL-shaped, AIR-CARRIED MATERIAL |
SE510707C2 (en) * | 1997-10-15 | 1999-06-14 | Flaekt Ab | Plant for drying a web of materials |
-
2001
- 2001-06-08 SE SE0102027A patent/SE519197C2/en not_active IP Right Cessation
-
2002
- 2002-05-31 CN CN 02815375 patent/CN1280479C/en not_active Expired - Lifetime
- 2002-05-31 WO PCT/SE2002/001044 patent/WO2002101143A1/en active IP Right Grant
- 2002-05-31 BR BRPI0210277-3A patent/BR0210277B1/en not_active IP Right Cessation
- 2002-05-31 EP EP02733752A patent/EP1436459B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO02101143A1 * |
Also Published As
Publication number | Publication date |
---|---|
SE0102027D0 (en) | 2001-06-08 |
EP1436459B1 (en) | 2007-03-07 |
CN1539042A (en) | 2004-10-20 |
BR0210277A (en) | 2004-07-20 |
SE519197C2 (en) | 2003-01-28 |
CN1280479C (en) | 2006-10-18 |
SE0102027L (en) | 2002-12-09 |
BR0210277B1 (en) | 2012-05-15 |
WO2002101143A1 (en) | 2002-12-19 |
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