EP1619300A1 - Dispositif de pressage - Google Patents
Dispositif de pressage Download PDFInfo
- Publication number
- EP1619300A1 EP1619300A1 EP05108375A EP05108375A EP1619300A1 EP 1619300 A1 EP1619300 A1 EP 1619300A1 EP 05108375 A EP05108375 A EP 05108375A EP 05108375 A EP05108375 A EP 05108375A EP 1619300 A1 EP1619300 A1 EP 1619300A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- channel
- water
- arrangement according
- press
- belt
- 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
Images
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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/48—Suction apparatus
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
-
- 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
- D21F3/0272—Wet presses in combination with suction or blowing devices
Definitions
- the invention relates to a press arrangement according to the preamble of claim 1.
- the press water is usually removed by gravity.
- the amount of water thrown off into the tub can not in each case flow laterally by gravity to the edge of the tub.
- the outflow cross section of the tub is too small and / or the tub does not have a sufficient inclination, water can flow back to the felt.
- a suction box for sucking water passing through a sieve has already become known, which is subdivided into a water suction chamber and an air suction chamber by a partition wall provided with passages.
- An object of the invention is to provide an improved water drainage device of the type mentioned, in which a reduction of the outflow cross-section of the trough accompanied by a corresponding saving of space is possible without problems.
- the invention also relates to a pressing arrangement for dewatering a fibrous web, in particular a paper, board or tissue web in a machine for producing and / or finishing the same, consisting of at least one of two approximately stacked and pressed against each other Press nip formed press nip, through which in addition to the fibrous web at least one above the fibrous web extending drainage tape for receiving the pressed out Water is conducted, wherein between the upper press roll and the dewatering belt, a water intake device is arranged.
- the aim of the invention is therefore to improve the efficiency of the water intake device of press arrangements.
- this object is achieved in that the water absorption of at least one, in the gusset between the upper press roll and the dewatering belt protruding and extending transversely to the fibrous web suction channel is formed, which is connected to a vacuum source.
- a suction channel much more water than with a gutter can be dissipated. This is especially true for press arrangements with an upper dewatering belt, which runs approximately horizontally or even rising after the press nip. His reason is found in particular in the fact that the suction channel can be very far out in the gusset and the negative pressure draws a lot of water in the suction channel.
- the suction channel For detecting the main direction of the centrifuged water, it is sufficient if the suction channel, at least in the initial region has a gap width of 1 to 50 mm, preferably from 2 to 7 mm. Especially with a rising suction channel, a certain minimum negative pressure in the suction channel is required to overcome the height difference caused by the absorbed water.
- the negative pressure in the suction channel should therefore be between 50 and 80,000 N / m 2 , preferably between 10,000 and 30,000 N / m 2 . In conjunction with the desired gap widths, these negative pressure values keep the energy for the generation of negative pressure within reasonable limits. Geleichzeitig is also ensured that the water in a, possibly higher collection container for receiving and transporting the sucked water can be performed.
- a structurally simple connection of the suction channel with a vacuum source results from the fact that the mouth of the suction channel is above the maximum water level in the reservoir and the reservoir has a connection for a vacuum source above the maximum water level.
- the collecting container may be subdivided transversely to the fibrous web into a plurality of chambers, each with a separate connection for a vacuum source. This allows a control, preferably a homogenization of the negative pressure across the width of the fibrous web.
- the suction channel is formed by one, transversely to the fibrous web extending upper and lower channel wall.
- the channel walls should extend at least in the initial region of the suction channel at an acute angle to the dewatering belt.
- the edge of the lower duct wall should be located as close as possible to the dewatering belt, the distance preferably being less than 20 mm.
- the edge may even touch the drainage tape or dip slightly into it. If the edge of the lower channel wall with the drainage tape comes in contact, so the execution of the same as a low-wear bar advantage.
- the strip should form an angle between 10 and 45 ° with the drainage tape.
- a water catcher should be connected to the suction channel as part of the water absorption device. It is structurally simplistic if the upper channel wall itself is part of the water collecting device. In addition, the surface of the upper channel wall lying outside the suction channel should be inclined to the press nip, and the edge of the upper channel wall at least slightly less protrude into the gusset than that of the lower channel wall. As a result, the trapped water on the outer surface of the upper channel wall runs back towards the press nip and can drip from the upper edge to the longer lower channel wall of the suction channel. From there, the discharge of this water takes place via the suction channel into the collecting container.
- the arranged above the suction water collecting device can also have their own reservoir with a drain for the collected water.
- the upper channel wall may also be advantageous to make the upper channel wall longer, so that it protrudes as far or further than the lower channel wall in the gusset. This increases the effect of the negative pressure on the dewatering belt.
- the distance of the upper channel wall from the upper press roll should be a multiple of the gap width of the suction channel, so that the gusset is not vented at too high a speed.
- the use of the water collecting device is possible in a variety of pressing arrangements. For example, under the fibrous web, a dewatering belt run through the press nip and run the press nip extended by the use of a shoe press roll.
- FIG. 1 shows a schematic cross-sectional view of a water collecting device.
- the press arrangement consists of a press nip for dewatering the fibrous web 38, which is formed by two press rolls 40, 42 pressed against one another and pressed against one another.
- a dewatering belt 44 in the form of a press felt for receiving the squeezed water is guided through the press nip on both sides.
- the press rolls 40, 42 are blind drilled and grooved, which is why they absorb a relatively large amount of water in the press nip, which is then spun off again after the press nip.
- a water intake device 46 is located between the upper press roll 40 and the upper dewatering belt 44 arranged.
- This water absorption device 46 is essentially formed by a, in the gusset between the upper press roll 40 and dewatering belt 44 and extending transversely to the fibrous web 38 extending suction channel 48, which is connected to a vacuum source.
- the suction channel 48 has a gap width of about 4 mm.
- the suction channel 48 leads into a collecting container 50 for receiving and removing the sucked-in water via a drain 52.
- a negative pressure of approximately 20,000 N / m 2 prevails in the suction channel 48.
- the slope of the suction channel 48 results in particular because the mouth 54 of the suction channel 48 is above the maximum water level in the collecting container 50.
- the collecting container 50 also has above the maximum water level height a connection 56 for a vacuum source.
- the suction channel 48 itself is formed by one, extending transversely to the fibrous web 38 upper 58 and lower 60 channel wall, the channel walls 58, 60 extend at least in the initial region of the suction channel 48 at an acute angle to the dewatering 44.
- the edge 62 of the lower channel wall 60 touches the dewatering belt 44 or it dives slightly into the dewatering belt 44. Therefore, the edge 62 of the lower channel wall 60 is also formed by a low wear bar 64 made of ceramic.
- the channel walls 58, 60 and the strip 64 form an angle of approximately 15 ° with the upper drainage band 44.
- a water collecting device 66 is arranged above the suction channel 48.
- the upper channel wall 58 is here part of the water collecting device 66, wherein the lying outside the suction channel 48 surface of the upper channel wall 58 is inclined to the press nip and the edge 68 of the upper channel wall 58 protrudes slightly less into the gusset, than that of the lower channel wall 60th Dies it is achieved that the water collected and returned from the outer surface of the upper channel wall 58 from the edge 68 of the upper channel wall 58 to the lower channel wall 60 can drop from where the discharge via the suction channel 48 into the collecting container 50 takes place.
- connection 56 leads to a further, preferably higher collection container, which is connected to the vacuum source.
Landscapes
- Paper (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20000599U DE20000599U1 (de) | 2000-01-14 | 2000-01-14 | Wasserabführeinrichtung |
DE10014873A DE10014873A1 (de) | 2000-01-14 | 2000-03-24 | Pressanordnung |
EP00128157A EP1116822B1 (fr) | 2000-01-14 | 2000-12-21 | Dispositif pour décharger l' eau |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00128157A Division EP1116822B1 (fr) | 2000-01-14 | 2000-12-21 | Dispositif pour décharger l' eau |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1619300A1 true EP1619300A1 (fr) | 2006-01-25 |
EP1619300B1 EP1619300B1 (fr) | 2007-10-24 |
Family
ID=7935904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05108375A Expired - Lifetime EP1619300B1 (fr) | 2000-01-14 | 2000-12-21 | Dispositif de pressage |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1619300B1 (fr) |
DE (1) | DE20000599U1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105714592A (zh) * | 2016-04-22 | 2016-06-29 | 浙江荣晟环保纸业股份有限公司 | 一种用于造纸业的压榨装置 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10014873A1 (de) * | 2000-01-14 | 2001-07-19 | Voith Paper Patent Gmbh | Pressanordnung |
DE10108517A1 (de) * | 2001-02-22 | 2002-08-29 | Voith Paper Patent Gmbh | Feuchtequerprofil |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1423400A (en) * | 1922-07-18 | Attachment for paper-making machines | ||
US2165549A (en) * | 1935-11-29 | 1939-07-11 | Beloit Iron Works | Paper machine suction slice |
US3355350A (en) * | 1964-12-18 | 1967-11-28 | Allis Chalmers Mfg Co | Paper machine |
EP0371786A2 (fr) * | 1988-12-01 | 1990-06-06 | Valmet-Karhula Inc. | Procédé et dispositif de formation de bandes continues |
-
2000
- 2000-01-14 DE DE20000599U patent/DE20000599U1/de not_active Expired - Lifetime
- 2000-12-21 EP EP05108375A patent/EP1619300B1/fr not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1423400A (en) * | 1922-07-18 | Attachment for paper-making machines | ||
US2165549A (en) * | 1935-11-29 | 1939-07-11 | Beloit Iron Works | Paper machine suction slice |
US3355350A (en) * | 1964-12-18 | 1967-11-28 | Allis Chalmers Mfg Co | Paper machine |
EP0371786A2 (fr) * | 1988-12-01 | 1990-06-06 | Valmet-Karhula Inc. | Procédé et dispositif de formation de bandes continues |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105714592A (zh) * | 2016-04-22 | 2016-06-29 | 浙江荣晟环保纸业股份有限公司 | 一种用于造纸业的压榨装置 |
CN105714592B (zh) * | 2016-04-22 | 2017-05-03 | 浙江荣晟环保纸业股份有限公司 | 一种用于造纸业的压榨装置 |
Also Published As
Publication number | Publication date |
---|---|
DE20000599U1 (de) | 2000-05-11 |
EP1619300B1 (fr) | 2007-10-24 |
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