EP0870866A2 - Appareil et procédé pour la déshumidification d'une bande - Google Patents

Appareil et procédé pour la déshumidification d'une bande Download PDF

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Publication number
EP0870866A2
EP0870866A2 EP97120809A EP97120809A EP0870866A2 EP 0870866 A2 EP0870866 A2 EP 0870866A2 EP 97120809 A EP97120809 A EP 97120809A EP 97120809 A EP97120809 A EP 97120809A EP 0870866 A2 EP0870866 A2 EP 0870866A2
Authority
EP
European Patent Office
Prior art keywords
press
material web
roller
web
felt
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
Application number
EP97120809A
Other languages
German (de)
English (en)
Other versions
EP0870866B1 (fr
EP0870866A3 (fr
Inventor
Andreas Meschenmoser
Klaus Esslinger
Wolfgang Mayer
Gerhard Kotitschke
Günther Mohrhardt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Sulzer Papiermaschinen GmbH
Voith Sulzer Papiertechnik Patent GmbH
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
Priority claimed from DE19705030A external-priority patent/DE19705030A1/de
Application filed by Voith Sulzer Papiermaschinen GmbH, Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Publication of EP0870866A2 publication Critical patent/EP0870866A2/fr
Publication of EP0870866A3 publication Critical patent/EP0870866A3/fr
Application granted granted Critical
Publication of EP0870866B1 publication Critical patent/EP0870866B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D21F3/045—Arrangements thereof including at least one extended press nip
    • 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

Definitions

  • the present invention relates to a device for drainage a material web, in particular a paper web in a paper making machine, with a press section with at least one press nip through which the material web guided and thereby drained and smoothed, whereby due to the design of the press section one side of the Material web is more smoothed than the other Page.
  • the present invention further relates to a method for dewatering a material web, in particular a paper web in a paper making machine in which the Material web is passed through at least one press nip, by dewatering and smoothing the material web, one side of the material web in the press nips one experiences more smoothing than the other side.
  • a paper web is dewatered in a press section usually with the help of felt ribbons are guided together with the paper web through the press nips.
  • the water squeezed out of the paper web is from the Felt webs picked up and transported away.
  • the felt tracks are usually carried out in loops and must therefore be conditioned to maintain their water absorption capacity.
  • the invention has for its object a device of the type mentioned at the beginning, indicating a drainage a web of material ensuring essentially one corresponding resulting roughness of the material web on their two sides in a relatively simple way enables.
  • Another object of the invention is to provide a method of Specify the type mentioned above, which is a drainage allows a web of material while doing it proportionally simple way of achieving an essentially coincident Roughness on both sides is the material web after the Drainage guaranteed.
  • the first object is achieved in that a Device for roughening the press section stronger smoothed web side is provided.
  • a material web is therefore not one additional smoothing of the less smoothed in the press section Made the top of the web, but the more smoothed material web in the press section roughened so that after leaving the press section essentially matching roughness on both sides the material web results.
  • This is not just from building the Device ago favorable, but also has the advantage that if desired, too much smoothing of the material web on your both sides can be avoided.
  • the device can therefore be used in particular if the arrangement of an equal number of smoothing rollers not possible or not on both sides of the material web is desirable.
  • the device according to the invention can also be used advantageously if a opposing smoothing during post-treatment of the paper web is not possible or undesirable.
  • One of the press sections is preferred for roughening the material web upstream pre-press device used so is designed so that it is more smoothed subsequently On the web side, a higher roughness than the other web side gives.
  • the roughness difference is particularly important set so that the material web after leaving the Press section on both sides one essentially has corresponding roughness.
  • the upstream pre-press device for example by two between them a nip forming rollers can be formed in addition to the roughness compensation the further advantage that the material web before entering the press section is partially drained. By the higher achieved with it The inlet dry matter content of the material web becomes its drainage improved in the press section.
  • the upstream pre-press device with the material web through the press nip screen belt, which is on the roughened Side of the material web is arranged.
  • the sieve belt is preferably guided in a loop adjacent web side of the led by the pre-press Material web roughened.
  • The is preferred here Press section upstream anyway for dewatering the material web Sieve loop of the paper forming sieve used.
  • the existing sieve loop there is also one Press device arranged, through the press nip, the material web is guided with the sieve belt.
  • the Prepressing device through at least one with the material web the press nip led felt band.
  • the felt tape advantageously pressed out in the pre-pressing device Drained water.
  • the felt tapes are preferably also carried out as a loop. Conditioning is advantageous here achieved that the water absorption properties of the felt tapes remain.
  • the pre-press device can also be a roller with a felt cover. This also expresses Water removed, preferably also one Conditioning device, in particular a felt washing press device for the felt cover is provided to increase water absorption of the felt cover.
  • the web of material is advantageously from the screen belt separated and the downstream press section in a suitable Fed way.
  • the pre-pressing device can, according to further refinements of the Invention a roller with recesses, in particular grooves or blind holes in the roll shell surface. This increases the water absorption capacity of the roller and thus the dewatering performance of the pre-press device improved.
  • the pre-pressing device can also have a roller have suctioned roll surface to the drainage performance to increase.
  • the press section for dewatering the material web can after Embodiments of the invention, for example one, two or have three press nips formed by main presses.
  • the main presses are, for example, as Shoe presses, in particular designed as long gap presses. All main presses also have at least one Felt tape, which together with the material web through the respective press nip is performed.
  • the felt ribbons are included again preferably designed as a loop and can with Conditioning devices to improve water absorption of the felt ribbons.
  • the first main press device have two rigid rollers while the second Main press device as a shoe press, in particular as an extended nip press is trained.
  • the first main press with two rigid rollers is preferred in the direction of web travel arranged in front of the shoe press. This configuration of the Main presses and the aforementioned selection of rollers has proven to be advantageous.
  • one of the rigid rolls of the first main press device by a Roll be formed, which is also part of the upstream Prepressing device is. This will make a total of rolls saved and the cost of the device reduced.
  • both can Main press devices as a shoe press, in particular an extended nip press be trained.
  • Such an embodiment and arrangement of the main press devices has been found to be advantageous exposed.
  • two main pressing devices designed as shoe presses, in particular elongated gap presses, while the third main press device two rigid Has rollers.
  • the following are preferably considered in the direction of web travel: the first and the third main pressing device as Shoe press and the second main press with two rigid rollers. It is particularly advantageous when the two rigid rollers of the two shoe presses together form the second main press device. This will two rollers saved and the cost of the press section reduced.
  • first main press device provided two felt tapes passed together with the material web through the press nip be while through the other two press nips each only a felt band is passed through with the material web. This gives good results in terms of drainage and smoothing achieved.
  • the line pressure on the material web in the pre-press device is preferably about 20 to about 100 kN / m, in particular approx. 50 kN / m. These values have proven to be particularly suitable exposed.
  • a press section 1 for dewatering a Material web in particular a single paper web
  • Main press device 2 which as a shoe press with a first Roller 3 with a flexible roller jacket and with a rigid counter roll formed second roller 4 is formed is.
  • a press device is connected upstream of the press section 1 5, which formed a first as a suction pressure roller Roll 6 and a second roller 7 includes, the surface with Provide recesses, in particular grooves or blind holes is to increase the water absorption capacity of the roller jacket.
  • the pre-pressing device 5 forms a first press nip 8, the main press device 2 of the press section 1 a second Press nip 9 for a material web 10.
  • the first roller 3 of the main press device 2 and the first Roller 6 of the pre-pressing device 5 are common in one of a loop of felt 11 arranged arranged, which is guided over pulleys 12.
  • the second roller 7 of the pre-pressing device 5 is inside one through a paper forming screen 13 formed loop arranged, which over pulleys 14 and a sieve suction roll 15.
  • the second roller 7 of the pre-pressing device 5 is also in a loop formed by a second felt band 16 is arranged, which is guided over pulleys 17.
  • conditioning devices 18 are provided.
  • Corresponding can also 11 conditioning devices for the felt belt be provided.
  • the pulleys 12, 14 and 17 is in each case at least one movable to generate a band tension educated.
  • the first press nip 8 are accordingly together with the Material web 10, the felt belt 11, the paper forming screen 13 and the felt belt 16, the two felt belts 11 and 16 of the respective roller 6 and 7 arranged adjacent are and the paper forming screen 13 between the material web 10 and the felt belt 16 of the second roller 7 runs.
  • the second press nip 9 is only with the material web 10 the felt belt 11 out, this the first roller 3 of the Main press device 2 runs adjacent. So it is Top of the material web 10 in the first press nip 8 touched with felt and touched the bottom while in the second Press nip 9 only touches the top of the material web 10 is.
  • the paper forming screen 13 is through the felt belt 16 supported in the first press nip 8.
  • the paper web 10 is further dewatered in the second press nip 9, the squeezed water through the felt belt 11 the press zone is promoted.
  • the pre-press 5 roughened underside of the paper web 10 through the smooth surface of the rigid roller 4 of the Main press device 2 smoothed so that the top and bottom the material web 10 after leaving the main press device 2 have substantially the same roughness.
  • Over a Suction pressure roller 19 and other rollers 20 becomes the paper web 10 then fed to a paper finishing.
  • the Main drainage capacity is through the main pressing device 2 causes, by the design as a shoe press the drainage and smoothing can be specifically adjusted.
  • the variant of the device from FIG. 1 differs from this only in the design of the pre-press device 5.
  • the pre-press device 5 has in addition to the first roller designed as a suction pressure roller 6 a second roller 21 with a felt cover 22.
  • the Felt belt 16 with the deflection rollers 17 is omitted for this.
  • a washing press is used to condition the felt cover 22 23 provided.
  • the functioning of this device is correct otherwise corresponds to the device of FIG. 1.
  • a first roller 6 designed as a suction pressure roller acts with a second, with recesses in the roll shell provided roller 7 to form a first press nip 8 together. Together with the material web 10 is through the press nip 8 a paper forming screen 13 out which the bottom roughen the material web 10.
  • Both the first roller 6 and the second roller 7 are in the loop one Felt belt 11 or 16 arranged, the felt belt 11 or 16 each of the associated roller 6 and 7 runs adjacent.
  • the felt belt 16 supports the paper forming screen 13 and leads together with the felt tape 11 squeezed Water from the pressing area.
  • the web 10 also fed to a second press nip 9 in this device, between a first roller 3 and a second Roller 4 of a main press device designed as a shoe press 2 is formed.
  • a third press nip 24 fed between a first roller 25 and a second Roller 26 of a second main press device 27 is formed is.
  • the paper web 10 is the second roller 4 of the first main press device 2 by means of a suction pressure roller 28 removed, which together with the first roller 25 of the second main press 27 in one by a felt belt 29 formed loop is located, which over pulleys 30th is guided, at least one of which is designed to be movable is to keep the felt band 29 under tension.
  • the material web in turn reaches the third press nip 24 via a suction pressure roller 19 and further rollers 20 to one Finishing facility.
  • the second main press 27 is the same as the first Main press device 2 designed and allowed as a shoe press therefore targeted drainage and smoothing of the paper web 10.
  • the water squeezed out is over the felt belts 11 and 29 removed from the pressing areas 9 and 24, here also the felt belts 11 and 29 by conditioning devices can be treated to increase their water absorption to obtain.
  • both main presses 2 and 27 are designed as upper felt presses That is, the top of the paper web 10 is in both press nips 9 and 24 felt while the bottom of the paper web 10 on the smooth surface of the counter roller 4 or 26 is present. So in both presses 2 and 27 the underside of the paper web 10 smoothed more than that Top. Accordingly, the underside of the paper web 10 in the pre-press device 5 through the paper forming screen 13 roughened to a substantially matching roughness the two sides of the paper web after leaving the press section 1 to ensure.
  • a third press nip 24 is provided, the first press nip 8 in a pre-pressing device 5, the second and the third press nip 9 and 24 in a first and a second main press device 2 and 27 are formed.
  • the pre-pressing device 5 comprises in addition to a first as Suction pressure roller 6 formed a second, also roller 31 designed as a suction pressure roller.
  • the second suction pressure roller 31 is also here in a by a felt band 16 and a loop formed by a paper forming screen 13 is arranged, the felt belt 16 adjacent to the second roller 31 is.
  • the first roller 6 of the pre-pressing device 5 is also arranged in the loop of a felt band 32, which over Deflection rollers 33 is guided, of which at least one for Generation of a belt tension is designed to be movable.
  • the pre-pressing device 5 with a suction device 34 equipped which is the top of the second Vacuum roller 31 to remove squeezed water.
  • the second press nip 9 of the first main press device 2 is in this device between the first roller 6 of the pre-pressing device 5 and a further roller 35 formed at the same time as the counter-roller of the second shoe press Main press device 27 is formed.
  • the roller 35 thus forms with another roller 36 with a flexible roller shell also the third press nip 24.
  • This roller 36 is in a loop formed by a further felt band 37, which by means of guide rollers 38, of which in turn at least one is movable, is guided.
  • To the second Main press device 27 again close a suction pressure roller 19 and other rollers 20 through which the paper web one Aftertreatment is supplied.
  • the paper web 10 is thus first between the paper forming screen 13 and the felt belt 32 passed through the first press nip 8. From there the Paper web 10 on the Sauganpreßwalze 6 in the second press nip 9, between this and the counter roller 35 of the second Main press device 27 is formed. On the counter roller 35 the web 10 then runs into the third press nip 24, which is the press nip of the shoe press device 27 acts, which is formed by the two rollers 35 and 36. After roughening the underside of the paper web 10 in the Prepressing device 5 becomes the underside of paper web 10 both in the second press nip 9 and in the third press nip 24 smoothed by the smooth surface of the rigid counter roll 35. After leaving the press section 1 is on this Way again obtained a paper web 10, the top and Underside have essentially the same roughness. The removal of the squeezed water and the conditioning felt tapes 16, 32 and 37 are made in the same way as described in the previous versions.
  • the device according to the invention shown in FIG. 5 is correct with regard to the pre-pressing device 5 with the device of Fig. 1 largely agree.
  • the two rollers 6 and 7 are each arranged in a loop of a felt band 11, 16, the second roller 7 additionally in the loop of a paper forming screen 13, which between the paper web 10 and the Felt belt 16 runs through the first press nip 8.
  • the paper web 10 is one second press nip 9 fed between a first than Suction pressure roller trained roller 39 and a second roller 40 of a first main press device 2 is formed.
  • the Suction pressure roller 39 forms the counter-roller to the flexible roller jacket designed as a shoe pressure roller Roller 40.
  • Paper web 10 arrives from second press nip 9 in a third press nip 24 which is between the suction pressure roller 39 and another rigid roller 41 as the second Main press device 27 is formed.
  • the rigid roller 41 is at the same time counter roll to a shoe pressure roll 42 third main press device 43 and forms one with this fourth press nip 44, through which the web in connection is guided to the third press nip 24.
  • the paper web 10 is here also by a suction pressure roller 19 removed and a further 20 rollers Post-treatment supplied.
  • the suction pressure roller 39 of the first main press device 2 is together with the suction pressure roller 6 of the pre-pressing device 5 arranged in the loop formed by the felt band 11.
  • the second roller 40 of the first main press device 2 is in arranged a separate loop of a further felt band 45, which in turn is guided over deflection rollers 46 by one of which is designed to be movable to generate a belt tension is.
  • the shoe pressure roller 42 is the third main press device 43 in a loop of a felt belt 47 arranged, which over pulleys 48, of which one in turn is designed to be movable.
  • 27 and 43 is the top the paper web 10 touched with felt. Only in the first The main press device 2 is also the underside of the paper web 10 felted. In the second main crusher 27 and the third main press device 43 becomes the bottom of the Paper web 10, however, through the smooth surface of the rigid Roller 41 smoothed.
  • the underside of the paper web is advantageously used for roughening 10 uses the paper forming screen 13 which is necessary anyway, by this through a first press nip 8 of the pre-pressing device 5 is performed.
  • a first press nip 8 of the pre-pressing device 5 is performed.
  • Possibilities of roughening the underside of the paper web conceivable to predominantly smooth one side of the paper web 10 compensate. In particular, this does not have to go through a pressing device.
  • the pre-press device has, however the advantage that the web 10 before the press section 1 is dewatered so that the paper web 10 a has low inlet water content.
  • rollers of the pre-press and the main press can also be used in other combinations than shown in which at least some of these rollers have more than one press nip forms, be arranged to the total number of rolls to keep low.
  • the felt tapes can also be done in a different way than previously described by way of example by more than one roller be to keep their number low.

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  • Paper (AREA)
EP97120809A 1996-12-23 1997-11-27 Appareil et procédé pour la déshumidification d'une bande Expired - Lifetime EP0870866B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19654195 1996-12-23
DE19654195 1996-12-23
DE19705030A DE19705030A1 (de) 1996-12-23 1997-02-10 Vorrichtung und Verfahren zur Entwässerung einer Materialbahn
DE19705030 1997-02-10

Publications (3)

Publication Number Publication Date
EP0870866A2 true EP0870866A2 (fr) 1998-10-14
EP0870866A3 EP0870866A3 (fr) 1999-06-02
EP0870866B1 EP0870866B1 (fr) 2003-05-07

Family

ID=26032754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97120809A Expired - Lifetime EP0870866B1 (fr) 1996-12-23 1997-11-27 Appareil et procédé pour la déshumidification d'une bande

Country Status (2)

Country Link
US (1) US6261416B1 (fr)
EP (1) EP0870866B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002036878A1 (fr) * 2000-11-06 2002-05-10 Metso Paper, Inc. Section des presses de machine a carton equipee d'une pre-presse et procede d'egouttage d'une bande continue dans un telle section des presses

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI116401B (fi) * 2000-02-22 2005-11-15 Metso Paper Inc Paperi- tai kartonkikone, jossa on muodostusosa ja puristinosa
DE10305754A1 (de) * 2002-02-22 2003-09-18 Voith Paper Patent Gmbh Pressanordnung
DE102008000021A1 (de) 2008-01-09 2009-07-16 Voith Patent Gmbh Verfahren zur Reduzierung des Verschleißes eines endlos umlaufenden Bandes in einer Maschine zur Herstellung von Faserstoffbahnen und Vorrichtung zur Behandlung einer Faserstoffbahn
AT508331B1 (de) * 2009-05-19 2011-05-15 Andritz Ag Maschf Verfahren und vorrichtung zur behandlung einer faserstoffbahn in einer langnip-presseinheit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0337973A2 (fr) * 1988-04-13 1989-10-18 Valmet Paper Machinery Inc. Procédé et dispositif de traitement par pression d'une bande de papier
EP0549553A1 (fr) * 1991-12-23 1993-06-30 Valmet Corporation Section de presse d'une machine à papier, en particulier pour papier à imprimer
DE4340041A1 (de) * 1993-11-24 1994-04-07 Voith Gmbh J M Pressenpartie für eine Papiermaschine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5389205A (en) * 1990-11-23 1995-02-14 Valmet Paper Machinery, Inc. Method for dewatering of a paper web by pressing using an extended nip shoe pre-press zone on the forming wire
US5639351A (en) 1991-12-23 1997-06-17 Valmet Corporation Press section of a paper machine, in particular for printing paper qualities
DE4301750C2 (de) 1993-01-23 1996-10-10 Voith Gmbh J M Verfahren und Vorrichtung zum Entwässern einer Bahn mittels Pressen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0337973A2 (fr) * 1988-04-13 1989-10-18 Valmet Paper Machinery Inc. Procédé et dispositif de traitement par pression d'une bande de papier
EP0549553A1 (fr) * 1991-12-23 1993-06-30 Valmet Corporation Section de presse d'une machine à papier, en particulier pour papier à imprimer
DE4340041A1 (de) * 1993-11-24 1994-04-07 Voith Gmbh J M Pressenpartie für eine Papiermaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002036878A1 (fr) * 2000-11-06 2002-05-10 Metso Paper, Inc. Section des presses de machine a carton equipee d'une pre-presse et procede d'egouttage d'une bande continue dans un telle section des presses

Also Published As

Publication number Publication date
US6261416B1 (en) 2001-07-17
EP0870866B1 (fr) 2003-05-07
EP0870866A3 (fr) 1999-06-02

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