EP0857818A2 - Machine pour la fabrication d'une bande fibreuse - Google Patents

Machine pour la fabrication d'une bande fibreuse Download PDF

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Publication number
EP0857818A2
EP0857818A2 EP97119412A EP97119412A EP0857818A2 EP 0857818 A2 EP0857818 A2 EP 0857818A2 EP 97119412 A EP97119412 A EP 97119412A EP 97119412 A EP97119412 A EP 97119412A EP 0857818 A2 EP0857818 A2 EP 0857818A2
Authority
EP
European Patent Office
Prior art keywords
press
web
machine according
pressure
shoe 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
Application number
EP97119412A
Other languages
German (de)
English (en)
Other versions
EP0857818B1 (fr
EP0857818A3 (fr
Inventor
Joachim Henssler
Hans Loser
Karl Dr. Steiner
Albrecht Bauder
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
Application filed by Voith Sulzer Papiermaschinen GmbH, Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Priority to EP02002779A priority Critical patent/EP1205599A3/fr
Publication of EP0857818A2 publication Critical patent/EP0857818A2/fr
Publication of EP0857818A3 publication Critical patent/EP0857818A3/fr
Application granted granted Critical
Publication of EP0857818B1 publication Critical patent/EP0857818B1/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
    • 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
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type

Definitions

  • the invention relates to a machine for producing a Fibrous web, in particular paper and / or cardboard web.
  • the aim of the invention is to provide a machine of the type mentioned kind of creating, especially with regard to achieving the highest possible dryness and one possible gentle treatment of the fibrous web further optimized is.
  • the object is achieved according to the invention in that it at least two drainage zones in succession in the direction of web travel includes in which the fibrous web each with in the direction of web travel from an initial to an end print increasing pressure is drained on one side, that the Drainage of the fibrous web in the direction of web travel considers the first of the two drainage zones as one Web side and in the second drainage zone to the other On the web side and that the initial pressure in the second drainage zone is lower than the ultimate pressure in the first drainage zone.
  • a drainage zone causing unilateral drainage can be provided a further drainage zone in the fibrous web drains to both sides of the web simultaneously becomes.
  • the fibrous web is double-sided Drainage causing further drainage zone preferably between two sieve belts, between two felt belts and / or dewatered between a wire and a felt belt.
  • the on the fibrous web effective pressure in at least one drainage zone through the Web tension generated at least one screen and / or felt belt is.
  • several sieve or Felt ribbons may be provided.
  • a sieve belt is preferably guided over a suction device.
  • the pressure increase in the second drainage zone is expedient somewhat steeper or equal to the pressure increase in the first drainage zone.
  • the fibrous web is preferably in at least one dewatering zone by at least one press nip of a mechanical Press led.
  • at least a press nip an elongated in the web running direction, press nip formed by a shoe press.
  • At least one simply felted press nip is expedient provided, the fibrous web preferably between the felt and one in particular by a roller Sheath of a shoe press unit and / or a band formed smooth surface is guided through this press nip.
  • the final pressure in a web running direction before a first one Drainage zone arranged, a bilateral drainage causing further drainage zone is preferably lower or equal to the initial pressure in the first drainage zone.
  • Embodiment of the machine according to the invention is the Initial printing in a first or second one-sided Drainage zone causing drainage at least essentially the same as the final pressure in the last one previous one-sided drainage to the same Drainage zone causing a side of the web.
  • the final pressure in the last one sided drainage too a drainage zone causing a web side is expedient at least substantially equal to the ultimate pressure in the last one-sided drainage to the other Drainage zone causing a side of the web.
  • the machine can be used to produce a multilayer fibrous web comprise a multi-layer headbox. So it is in particular, a different substance input is possible.
  • the sheet-forming material can be h-free or also h-containing.
  • the first press nip has occurred often surface compaction, which led to that the water in subsequent press nips no longer could escape from the web.
  • This disadvantage is invented avoided in particular by the fact that the maximum Pressure in the nip of the first viewed in the direction of web travel Shoe press is less than or equal to about 15 bar.
  • the maximum pressure is advantageously in a range from about 2 to about 15 bar and expediently in a range from about 2 to about 8 bar, preferably 8 bar is.
  • the Line force generated in the press nip of the first shoe press less than 300 kN / m and preferably less than or equal to 150 kN / m.
  • the length of the first considered in the direction of web travel is advantageously located in a range from about 200 to about 350 mm.
  • the one assigned to the shoe press unit of the first shoe press Counter roll can be, for example, a suction roll. This can also be provided with blind holes and / or grooved be. Instead of a suction roller, a simple, roller provided with blind holes. In the However, the counter roller can also be a profile roller.
  • the maximum pressure in the press nip this second shoe press is about three times as large as that in the nip of the first shoe press and preferably is in a range from about 15 bar to about 30 bar.
  • the maximum generated in the nip of the second shoe press Line force is preferably about 450 kN / m.
  • a roller press with a press nip lying between two rigid roll shells be provided, the maximum pressure in this press nip in a range from about 8 to about 20 bar, especially in is in a range from about 8 to about 15 bar and is preferred Is 10 bar.
  • the during operation in the nip of the roller press is advantageously in a range from about 10 to about 30 kN / m, preferably is about 20 kN / m.
  • one additional shoe press may be provided, the one in the extended one Press gap of the further shoe press generated maximum Line force in particular in a range from about 600 to 1200 kN / m and are preferably about 800 kN / m can.
  • one can additional press may be provided in the web running direction behind the other shoe press.
  • the press nips of the further shoe press and the additional press felted on different web sides are and that the maximum pressure in the nip of the additional press approximately equal to that in the press nip of the other Shoe press is.
  • the additional press it can for example, a shoe press or also a act simple roller press.
  • the press nip of the first shoe press is preferably double felted.
  • the machine comprises at least one variant Shoe press with a press nip extended in the direction of web travel, in which the maximum line force is less than 150 kN / m, is preferably less than 100 kN / m.
  • a shoe press can therefore be used as a replacement for a roller press.
  • Such Shoe press unit is especially for quality improvement for cardboard machines, but also for the production of graphic Paper and can be used for other qualities.
  • Figure 1 shows a schematic representation of a by Roll gap guided fiber web 10.
  • the roll gap is double felted, the fibrous web 10 through on both sides the two felts 13 is dewatered. At higher drainage speeds it can be on the surface of the web come to the formation of a dense layer 12, the further water penetration through the web surface hindered.
  • FIG. 2 schematically shows a fibrous web 10 supporting Screen belt 14 shown, on one side of the Stock suspension 16 applied and on the other side a differential pressure - ⁇ p is applied. As with FIG. 2 can be seen, it can also be used for training in this case come a dense layer 12.
  • the surface compaction is among others of the respective fabric, the respective weight per unit area and the respective dry matter content.
  • a machine according to the invention for producing a fibrous web which may in particular be a paper and / or cardboard web
  • at least two drainage zones I, II which follow one another in the web running direction L are provided, in which the fibrous web 10 in each case increases in pressure in the web running direction L from an initial to an end pressure p 1 , p 3 or p 2 , p 4 (see, for example, FIG.
  • p is dewatered on one side, the dewatering of the fibrous web 10 in the first I of the two dewatering zones I, II, viewed in the direction of web travel L, to one side of the web and in the second dewatering zone II to the other side of the web, and the initial pressure p 3 in the second dewatering zone II is lower than the final pressure p 2 in the first drainage zone I.
  • two further such drainage zones I ', II' are provided.
  • Figure 3 shows a schematic representation of the pressure curve in three drainage zones one behind the other in the web running direction L.
  • an embodiment of an inventive for the production of a fibrous web 10 serving machine is in the web running direction L before the first and the second one causing one-sided drainage Drainage zone I or II a further drainage zone Z provided, in which the fibrous web 10 simultaneously to both railway sides is drained.
  • the initial pressure p 3 in the second drainage zone II is significantly lower than the final pressure p 2 in the first drainage zone I.
  • the drainage takes place in the first Drainage zone I up while in the second Drainage zone II downwards.
  • the initial pressure p 1 or p 3 is lower than the final pressure p 2 or p 4 .
  • FIG. 3 also shows that the final pressure in zone Z causing double-sided drainage is substantially equal to the initial pressure p 1 in the first zone I causing single-sided drainage.
  • the final pressure of a previous two-sided drainage can also be slightly lower than the initial pressure of the following one-sided drainage.
  • the double-sided dewatering of the fibrous web can e.g. between two sieve belts, two felt belts and / or between a sieve and a felt belt.
  • the fibrous web 10 acting pressure through the web train two over creates a curved surface of guided bands 18, 20 at which are each a sieve and / or felt belt can.
  • the band 18 is immediately over guided a roller 22 with a rigid roller shell.
  • the roller 22 and the Shoe press unit can be grooved or vacuumed.
  • a sieve can run over one or more suction cups.
  • Dewatering can also be done by applying a differential pressure take place, as indicated for example in Figure 2 is.
  • the fibrous web can be in at least one dewatering zone 10 by at least one press nip of a mechanical press be led.
  • Figure 6 is a schematic Representation of a simple felted slit one Shoe press shown.
  • the fibrous web is 10 between the felt 24 and an all-round smooth surface passed through the press nip, which in the present case a smooth counter-roller 28 assigned to the shoe press unit 26 is formed.
  • Figure 7 shows a schematic side view of another Embodiment of a for producing a fibrous web serving machine according to the invention with several in Direction of web running drainage zones Z, I, II, I 'and II', the pressure curve of which is shown schematically in FIG 8 is shown.
  • the initial pressure in the one-sided drainage down effecting drainage zone I ' is at least essentially same as the final pressure of the last preceding one, one-sided drainage to the same web side dewatering zone I.
  • the final pressure is in the last one causing one-sided drainage upwards Drainage zone II 'at least substantially the same Final pressure in the last one-sided drainage down effecting drainage zone I '.
  • the embodiment shown in Figure 7 includes for generation a multi-layer fiber web a multi-layer headbox 30th
  • the sheet formation zone 32 In the sheet formation zone 32 are in the loop of the upper one Sieve belt 34 provided water removal means 36. Opposite these a first suction device 38 is provided, which in the Loop of the lower sieve belt 40 is arranged. In the area this sucker 38 becomes a relatively low differential pressure ⁇ p generated, for example in the range of about 0.1 to can be about 0.5 bar. In the area of the suction cup 38 results in the present case the drainage zone Z (cf. also Figure 8).
  • the differential pressure generated in this case is relative high. For example, it can be around 0.6 bar.
  • second sucker 44 again a relatively low differential pressure, the between in the present embodiment about 0.1 and about 0.5 bar.
  • This overhead sucker 44 causes unilateral drainage upwards, which, like can be seen in Figure 8, is less than the subsequent also upward one-sided drainage in the area of a further suction roller 46, around which in turn both sieve belts 34, 40 are guided.
  • a drainage zone with a stepped pressure curve II formed (see also Figure 8).
  • Differential pressure generated, as in the suction roller 42 for example can be about 0.6 bar.
  • this includes press section adjoining the wire section two shoe presses 48, 50, through which the two also shown in Figure 8 Drainage zones I 'and II' are formed.
  • the web surface can be a high final pressure can be deliberately compressed.
  • Figures 9 to 11 is a schematic side view each a press arrangement of a further embodiment an inventive for the production of a fibrous web Machine shown.
  • Each of these press assemblies includes multiple shoe presses.
  • the maximum pressure in the press nip is in the web running direction L considers the first shoe press 52 smaller or about 15 bar.
  • the maximum pressure is in a range from about 2 to about 15 bar, it being expedient are in a range from about 2 to about 8 bar and preferably Can be 8 bar.
  • the operation in the nip of the first shoe press 52 generated line force less than 300 kN / m and preferably less than or equal to 150 kN / m.
  • Length of the press shoe assigned to this shoe press 52 54 is in a range of about 200, for example up to about 350 mm.
  • Shoe press 52 a shoe press unit 56 and a suction roll 58.
  • the press nip A formed by this shoe press 52 is double felted.
  • FIG 9 is in the web running direction L behind the first Shoe press 52 a second shoe press 60 is provided, a roller press between the two shoe presses 52 and 60 62 is formed, the one roller 64 and the central Suction roll 58 includes to form the nip B therebetween.
  • the roller 64 simultaneously forms the counter roller to one of the second shoe press 60 associated shoe press unit 66 to form the third press nip C.
  • the suction roller 58 can additionally be provided with blind bores and / or be grooved, as in the exemplary embodiment according to Figure 10 is shown.
  • the suction roller 58 is also another Shoe press unit 56 'assigned to this suction roller 58 a further press nip extended in the direction of web travel form.
  • the second is Shoe press 60 designed so that in this through Press formed press nip C gives a maximum pressure that is about three times the size of that in the first shoe press.
  • This maximum pressure in the press nip C can, for example, in range from about 15 bar to about 30 bar.
  • the maximum line pressure can be, for example, about 450 kN / m be.
  • the roller press 62 following the first shoe press 52 designed in this way be that there is a smaller one in the press nip B in question Pressure results, the maximum pressure in this press nip B, for example, in a range from about 8 to about 15 bar can be.
  • the line force is, for example, in a range from about 10 to about 30 kN / m, with preference is about 20 kN / m.
  • a first shoe press behind a second shoe press or behind one, for example after a first shoe press, another roller press Shoe press can be provided, which in the extended
  • the press nip of this additional shoe press generated maximum line force e.g. are in a range from about 600 to 1200 kN / m can and is preferably about 800 kN / m.
  • the shoe press 60 having the press nip C. correspondingly in the embodiment shown in FIG. 9 be trained.
  • the maximum pressure in the press nip A is in a range from 2 to 15 bar and for example Is 8 bar
  • the maximum pressure in the press nip B is in a range from 8 to 20 bar and for example Is 10 bar
  • the maximum pressure in the Press nip C is in a range from 30 to 100 bar.
  • FIG. 11 differs differs from that of FIG. 9 essentially in that in An additional web running direction L behind the second shoe press 60 Press 70, in the present case again Shoe press is provided.
  • the maximum pressure in the press nip D of the additional press 70 is preferred approximately equal to that in the nip C of the second shoe press 60.
  • At least one shoe press a maximum line force less than 150 kN / m and is preferably less than 100 kN / m, as a replacement for roller presses to use.
  • This allows shoe press units to be smaller Diameter of 600 mm, for example, which can then be easily installed in the current presses are.
  • An appropriate shoe press can be used to improve quality especially in advance machines, but also for graphic papers and other qualities.

Landscapes

  • Paper (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Nonwoven Fabrics (AREA)
EP97119412A 1997-01-24 1997-11-06 Machine pour la fabrication d'une bande fibreuse Expired - Lifetime EP0857818B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02002779A EP1205599A3 (fr) 1997-01-24 1997-11-06 Machine pour la fabrication d'une bande fibreuse

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19702575A DE19702575A1 (de) 1997-01-24 1997-01-24 Maschine zur Herstellung einer Faserstoffbahn
DE19702575 1997-01-24

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP02002779A Division EP1205599A3 (fr) 1997-01-24 1997-11-06 Machine pour la fabrication d'une bande fibreuse

Publications (3)

Publication Number Publication Date
EP0857818A2 true EP0857818A2 (fr) 1998-08-12
EP0857818A3 EP0857818A3 (fr) 1999-06-09
EP0857818B1 EP0857818B1 (fr) 2003-05-07

Family

ID=7818287

Family Applications (2)

Application Number Title Priority Date Filing Date
EP02002779A Withdrawn EP1205599A3 (fr) 1997-01-24 1997-11-06 Machine pour la fabrication d'une bande fibreuse
EP97119412A Expired - Lifetime EP0857818B1 (fr) 1997-01-24 1997-11-06 Machine pour la fabrication d'une bande fibreuse

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP02002779A Withdrawn EP1205599A3 (fr) 1997-01-24 1997-11-06 Machine pour la fabrication d'une bande fibreuse

Country Status (3)

Country Link
US (2) US6254728B1 (fr)
EP (2) EP1205599A3 (fr)
DE (2) DE19702575A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001036746A1 (fr) * 1999-11-17 2001-05-25 Andritz Ag Dispositif d'assechement pour bande de matiere fibreuse

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001036742A2 (fr) * 1999-11-17 2001-05-25 Andritz Ag Dispositif d'assechement pour bande de matiere fibreuse
DE10021320A1 (de) 2000-05-02 2001-11-08 Voith Paper Patent Gmbh Doppelsiebformer
ATE524699T1 (de) * 2003-03-31 2011-09-15 Pmt Italia Spa Pressvorrichtung zur entwässerung einer papierbahn
DE102005020219A1 (de) * 2005-04-30 2006-11-09 Voith Patent Gmbh Langspaltpresse
DE102005020218A1 (de) * 2005-04-30 2006-11-09 Voith Patent Gmbh Langspaltpresse
DE102005020220A1 (de) * 2005-04-30 2006-11-09 Voith Patent Gmbh Langspaltpresse
DE102005031203A1 (de) * 2005-07-01 2007-01-25 Voith Patent Gmbh Papiermaschine
US9523173B1 (en) * 2013-04-09 2016-12-20 Pmt Italia S.L.A. Press apparatus
DE102018119381A1 (de) * 2018-08-09 2020-02-13 Voith Patent Gmbh Pressanordnung
DE102018119383A1 (de) * 2018-08-09 2020-02-13 Voith Patent Gmbh Maschine und Verfahren zur Herstellung einer Wellpappenrohpapierbahn

Citations (3)

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Publication number Priority date Publication date Assignee Title
DE3217860A1 (de) * 1981-05-15 1982-12-23 Valmet Oy, 00130 Helsinki Zweisieb- formerpartie einer papiermaschine
US4714521A (en) * 1984-11-15 1987-12-22 Mitsubishi Jukogyo Kabushiki Kaisha Twin wire former with an impermeable belt inside the top wire
DE9113500U1 (de) * 1991-10-30 1991-12-19 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Vorrichtung zur mechanisch-thermischen Entwässerung einer Faserstoffbahn

Family Cites Families (10)

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FI842114A (fi) * 1984-05-25 1985-11-26 Valmet Oy Pressparti med separata presszon i en pappersmaskin.
EP0289477A3 (fr) * 1987-04-28 1989-03-08 Valmet Paper Machinery Inc. Procédé pour le pressage à chaud d'une bande de papier et dispositif de séchage pour l'application du procédé
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
FI98844C (fi) * 1991-12-23 1997-08-25 Valmet Paper Machinery Inc Paperikoneen puristinosa, etenkin painopaperilaaduille
FI112391B (fi) * 1993-12-08 2003-11-28 Metso Paper Inc Paperikoneen puristinosa, jossa käytetään pitkänippipuristinta
FI114227B (fi) * 1995-04-24 2004-09-15 Metso Paper Inc Paperikone, jossa on puristinosa ja kuivatusosa
DE19522462A1 (de) * 1995-06-21 1997-01-02 Voith Sulzer Papiermasch Gmbh Vorrichtung zur Entwässerung einer Faserstoffbahn
US5908536A (en) * 1995-10-03 1999-06-01 Valmet Corporation Method and machine for removing water from a paper or board web by pressing
DE19654198A1 (de) * 1996-12-23 1998-06-25 Voith Sulzer Papiermasch Gmbh Maschine zur Herstellung einer Faserstoffbahn

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3217860A1 (de) * 1981-05-15 1982-12-23 Valmet Oy, 00130 Helsinki Zweisieb- formerpartie einer papiermaschine
US4714521A (en) * 1984-11-15 1987-12-22 Mitsubishi Jukogyo Kabushiki Kaisha Twin wire former with an impermeable belt inside the top wire
DE9113500U1 (de) * 1991-10-30 1991-12-19 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Vorrichtung zur mechanisch-thermischen Entwässerung einer Faserstoffbahn

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001036746A1 (fr) * 1999-11-17 2001-05-25 Andritz Ag Dispositif d'assechement pour bande de matiere fibreuse

Also Published As

Publication number Publication date
DE19702575A1 (de) 1998-07-30
EP0857818B1 (fr) 2003-05-07
EP0857818A3 (fr) 1999-06-09
EP1205599A2 (fr) 2002-05-15
DE59710037D1 (de) 2003-06-12
EP1205599A3 (fr) 2003-07-23
US6254728B1 (en) 2001-07-03
US20020124981A1 (en) 2002-09-12

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