EP1536062A1 - Section de formage à deux toiles pour une machine de fabrication d'une bande de matériau fibreux et procédé correspondant - Google Patents

Section de formage à deux toiles pour une machine de fabrication d'une bande de matériau fibreux et procédé correspondant Download PDF

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Publication number
EP1536062A1
EP1536062A1 EP03104438A EP03104438A EP1536062A1 EP 1536062 A1 EP1536062 A1 EP 1536062A1 EP 03104438 A EP03104438 A EP 03104438A EP 03104438 A EP03104438 A EP 03104438A EP 1536062 A1 EP1536062 A1 EP 1536062A1
Authority
EP
European Patent Office
Prior art keywords
suction
controllable
twin
wire former
fibrous web
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
EP03104438A
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German (de)
English (en)
Other versions
EP1536062B1 (fr
Inventor
Erich Brunnauer
Franz Stelzhammer
Manfred Gloser
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
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Voith Paper Patent GmbH
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Publication date
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1536062A1 publication Critical patent/EP1536062A1/fr
Application granted granted Critical
Publication of EP1536062B1 publication Critical patent/EP1536062B1/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
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/32—Washing wire-cloths or felts
    • 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 twin-wire former of a machine for the production a fibrous web, in particular a paper or board web, of at least a pulp suspension, with two continuous endless sieves, the to form a wedge-shaped Stoffschsspalts, directly from a Headbox receives the pulp suspension, converge and then form a twin-wire section, in which - seen in-Sieblaufraum- the two sieves at least one each, in the direction of the sieve one after the other arranged forming unit and drainage unit, each at least by means of negative pressure water from the introduced between the two sieves Remove pulp suspension through the respective sieve, pass it and afterwards be separated from each other, wherein the forming fibrous web on a Sieve remains.
  • the invention further relates to a method for producing a fibrous web, in particular a paper or board web, of at least one pulp suspension according to the preamble of claim 24.
  • twin-wire former for example, from the two German patents DE 198 03 591 (PB10656 DE) and DE 196 51 493 A1 (PB10449 DE) of the applicant. He is producing nowadays of cardboard and packaging papers at low production speeds In future, these varieties will also be used at higher production speeds to be produced. This dramatically increases that Problem of contamination of the twin wire former and adjacent assemblies due to the increased entrainment of windrows, such as steam mist and the same. This entrainment of swaths is particular those used for the production of cardboard and packaging papers coarser sieve types of importance, since they are far larger amounts of swaths for example, the narrower screen types for high-speed paper machines, Especially for newspaper printing, lug.
  • This object is achieved according to the invention in a twin-wire former, that in the course of at least one of the two sieves at least a suction device with at least one suction opening for the discharge of Steam is provided.
  • This suction device according to the invention causes a fast and efficient extraction of swaths, moreover as close as possible at the place of its creation.
  • the suction device is preferably in a region of the course of the corresponding Siebs provided in which the sieve is not in direct contact stands with the fibrous web to be produced. This becomes a possible influence the suction device on the fibrous web to be produced completely avoided.
  • the suction device preferably as a slot suction device, as a hood extraction device or as a room extraction device is formed, inside or outside the loop of the endless sieve be arranged.
  • the slot extraction is conveniently in the range of free run of the corresponding sieve, whereas the hood suction in a preferred manner in the region of a deflection of the corresponding Siebs is arranged, wherein in the region of the deflecting preferably at least an HD spray tube for loading the sieve with a cleaning medium, especially cleaning fluid, is attached.
  • the suction device is designed as at least a two-chamber system, the first larger, preferably top-mounted chamber for collecting and discharging the water and the second smaller, preferably mounted on the underside chamber for collecting and discharging the air is designed, wherein the first chamber preferably has an aligned in the discharge direction guide system, in particular vanes, and wherein the supply of air into the second chamber by means of laterally above the first chamber beginning and opening into the second chamber channels. So that the smallest possible amount of ambient air is extracted, the clear distance between the suction opening and the adjacent sieve is minimized, preferably less than 300 mm.
  • the suction device extends ideally over the entire width of the produced Fibrous web away, the suction opening and / or a Plurality of suction openings, which are preferably designed as suction nozzles are, over the entire width of the fibrous web to be produced can extend.
  • suction openings or the suction nozzles are more preferred Design for two or more sections with at least two suction openings or extractor per section summarized, preferably each section of suction openings or suction Throttle valves or the like can be assigned. This will allows adjustment of the sectional suction.
  • the suction or suction preferably polygonal Absaugkonturen exhibit.
  • the polygonal Absaugkonturen the suction or Exhaust nozzles may have rectangles and / or squares and / or Diamonds and / or ellipses and / or ovals and / or circles.
  • the suction device has at least one controllable / suction pump on.
  • the suction device has two controllable / controllable Suction pumps, two controllable exhaust fans or similar, the driver or drive side, the half of the plurality of suction aspirate, and / or each section of suction or exhaust has a suction pump, an exhaust fan or the like controllable and preferably single drive on and / or each suction opening or each suction nozzle has a suction pump, a Exhaust fan or similar with controllable / preferably single drive on.
  • the suction pump, the exhaust fan or the like a controllable / controllable extraction volume in the range of 1 to 40 m 3 / h per m working width per m / min screen speed, preferably from 1.4 to 25 m 3 / h per meter working width per m / min screen speed, up.
  • the suction pump, the exhaust fan or the like in this case generates a controllable / suction speed in the range of 10 to 25 m / s, preferably from 12 to 20 m / s.
  • the inventive output is procedurally achieved in that at least one of the two sieves in the respective course by means of at least one Suction device with at least one suction opening for the discharge of Steam is applied.
  • This inventive method causes a fast and efficient extraction of swaths, moreover as close as possible to the Place of their creation.
  • FIG. 1 shows a schematic side view of a twin-wire former 1 of a machine for producing a fibrous web 2, in particular a paper or board web, from at least one pulp suspension 3, with two continuous endless sieves (lower sieve 4, upper sieve 5), forming a wedge-shaped Stoffeinlaufspalts 6, which receives directly from a headbox 7, the pulp suspension 3, converge and then form a Doppelsiebrange 8, in which -in Sieblaufettitude S (arrow) seen- the two wires 4, 5 at least one, in the direction of wire direction S (arrow) successively arranged Forming unit 9 and drainage unit 10, each of which at least by means of negative pressure water from the introduced between the two sieves 4, 5 pulp suspension 3 through the respective sieve 4, 5, pass and then separated from each other, wherein the forming fibrous web 2 on the screen 4th remains.
  • the headbox 7 can also be equipped as a multilayer headbox and / or as a headbox with sectioned dilution water technology ("Module-Jet" system
  • the lower wire 4 runs over one Peripheral region 11 of a preferably evacuated forming roller 12 with indicated Vacuum device and the top wire 5 runs over a peripheral region 13 of a breast roll 14.
  • the double sieve section formed by the two sieves 4, 5 8 extends at the end of the forming roller 12 at an angle ⁇ from -50 ° to + 50 ° to an imaginary vertical plane V down.
  • a deflection device 15 in particular a deflection roller 15.1 is arranged, the two wires 4, 5 in a preferably substantially horizontal direction L (arrow) deflects.
  • the Upper sieve 5 separates from the formed fibrous web 2 and the lower sieve 4.
  • the Top wire 5 runs over guide rollers 17 back to the breast roll 14, whereas the Under sieve 4 with the fibrous web 2 lying thereon via an optional Sievesaugwalze 18 is guided to a pickup roller 19, before it then over Guide rollers 17 back to Formierwalze 12 runs.
  • the twin-wire former 1 shown here according to the embodiment of the already mentioned German Offenlegungsschrift DE 198 03 591 A1 (PB10656 DE) of Applicant may in a further embodiment also according to the execution of the German Published Patent Application DE 196 51 493 A1 (PB10449 DE) of the applicant be.
  • the possible execution of the twin wire former should not be limited to the embodiment of Figure 1, the execution according to the figure 1 is merely exemplary character for a variety of have possible variants for the twin-wire former.
  • suction device 20 with at least one suction opening 21 provided for the removal of swaths 22. It is intended that the suction device 20.1 to 20.5 in a region of the course the corresponding sieve 4, 5 is provided, in which the sieve 4, 5 not in direct contact with the fibrous web 2 to be produced stands.
  • the in the figure 1 schematically indicated suction devices 20.1 to 20.5 are purely exemplary, both in terms of their number and their locations.
  • three suction devices 20. 1, 20. 2 are provided and 20.4 within the two loops of the endless sieves 4, 5 and two suction devices 20.3, 20.5 outside the two loops of the endless sieves 4, 5 arranged.
  • the suction device 20.5 is designed as a slot suction and in the area a free run of the screen 5, whereas the suction device 20.3 is designed as a hood suction and in the area of Deflection of the screen 4 is arranged, wherein in the region of the deflection element 17th (Guide roller) preferably at least one known HD spray tube 23 for application sieve 4 with a cleaning medium 24, in particular cleaning liquid, is appropriate.
  • the suction device can in a further embodiment Also designed as a specially designed Jardinabsaugungs leverage be.
  • each suction device 20.1 to 20.5 extends over the entire width B of the produced Fiber web 2 away.
  • FIGS 2 to 5 are schematic views of various inventive Suction devices 20.
  • the suction device 20 shown in Figure 2 for example, two, preferably a plurality of suction openings 21, which ideally over the Whole width B of the fibrous web 2 to be produced with a screen direction S (Arrow), wherein the sieve 4 (5) is guided over a guide roller 17.
  • the illustrated suction device 20 is a slot suction with polygons Suction 21 and suction 25 in the form of rectangles. The size and the distance between the rectangles are selectable.
  • the suction device 20 two controllable and schematized suction pumps 26, the leader or drive side half of the plurality of suction openings To take 21; the suction channel 27 of the suction device 20 is in this case advantageously divided in the middle (dash-dot line).
  • the reference numeral can also schematically illustrated an exhaust fan or the like; this applies for all figures 2 to 5.
  • the suction device 20 shown in Figure 3 is as one over the whole Width B of the fibrous web 2 to be produced extending hood extraction is formed and it is arranged in the region of a deflection of the sieve 4 (5), wherein in the region of the deflection element 17 (guide roller) an HD spray tube 23 for acting on the sieve 4 (5) with a cleaning medium 24, in particular Cleaning fluid, is attached.
  • the suction device can in further embodiment as a specially designed Jardinabsaugungs friendship be educated.
  • the suction device 20 has in FIG. 3 two, preferably a plurality of exhaust ports 25 designed as suction 21 on.
  • Each suction opening 21 or each suction nozzle 25th has a suction pump 26 with controllable / controllable and preferably single drive 27, which are shown in Figure 4 in more detail. Furthermore, the clear distance A between the suction openings 21 and the adjacent sieve 4 (5) minimized, preferably less than 300 mm.
  • the suction device 20 shown in FIG. 4 is also referred to as "slot extraction" formed having a plurality of over the entire width B of the produced Fiber web 2 extending suction 21 with corresponding Suction nozzle 25 and a common suction channel 27 has.
  • the "Schlitzabsaugung" can in a further embodiment with only a single Slot (dashed line) to be executed.
  • the suction openings 21 or the exhaust pipe 25 have polygonal suction contours, in Figure 4, these are circles.
  • the polygonal Absaugkonturen the Suction 21 and suction 25 also rectangles and / or squares and / or diamonds and / or ellipses and / or ovals, wherein this list of suction contours has merely exemplary character.
  • the suction device 20 of FIG. 4 has a controllable suction pump 26 with controllable / individual drive 27, such as an electric motor, on.
  • the suction openings 21 and the suction nozzle 25 of the suction device 20 of Figure 4 also to two or more sections with at least two suction openings 21 and Absaugstutzen 25 be summarized per section.
  • the two left-hand suction openings are shown 21 or exhaust pipe 25 to such a section N with corresponding Design trained.
  • Fibrous web 2 extending suction device 20 is as at least a two-chamber system 29 executed, the first larger, preferably upper side attached chamber 29.1 for the collection and discharge of water 32 (Arrow) and its second smaller, preferably mounted on the underside chamber 29.2 is designed for the collection and discharge of air 33 (arrow), the first chamber 29.1 preferably in the discharge direction R (arrow) aligned Guiding system 30, in particular known in the art guide vanes 30.1, has and wherein the supply of air 33 (arrow) in the second chamber 29.2 means laterally above the first chamber 29.1 beginning and in the second Chamber 29.2 opening channels 31.
  • the at least one suction pump 26 has a controllable suction volume in the range from 1 to 40 m 3 / h per m working width per m / min wire speed, preferably from 1.4 to 25 m 3 / h per meter working width per m / min screen speed, and that the respective at least one suction pump 26 generates a controllable extraction speed in the range of 10 to 25 m / s, preferably 12 to 20 m / s.
  • the described twin wire former 1 with inventive suction device 20 is particularly suitable for carrying out the invention Method, wherein at least one of the two sieves 4, 5 in the respective Course by means of at least one suction device 20 with at least one suction opening 21 is applied to the removal of windrows 22.

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  • Preliminary Treatment Of Fibers (AREA)
EP03104438A 2002-11-28 2003-11-28 Section de formage à deux toiles pour une machine de fabrication d'une bande de matériau fibreux et procédé correspondant Expired - Lifetime EP1536062B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10255471 2002-11-28
DE10255471A DE10255471A1 (de) 2002-11-28 2002-11-28 Doppelsiebformer einer Maschine zur Herstellung einer Faserstoffbahn und dazugehöriges Verfahren

Publications (2)

Publication Number Publication Date
EP1536062A1 true EP1536062A1 (fr) 2005-06-01
EP1536062B1 EP1536062B1 (fr) 2008-05-07

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EP03104438A Expired - Lifetime EP1536062B1 (fr) 2002-11-28 2003-11-28 Section de formage à deux toiles pour une machine de fabrication d'une bande de matériau fibreux et procédé correspondant

Country Status (4)

Country Link
EP (1) EP1536062B1 (fr)
AT (1) ATE394541T1 (fr)
DE (2) DE10255471A1 (fr)
ES (1) ES2305405T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010091915A1 (fr) 2009-02-12 2010-08-19 Voith Patent Gmbh Formeur à double toile

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10255471A1 (de) * 2002-11-28 2004-07-22 Voith Paper Patent Gmbh Doppelsiebformer einer Maschine zur Herstellung einer Faserstoffbahn und dazugehöriges Verfahren
FI117291B (fi) * 2005-06-01 2006-08-31 Metso Paper Inc Menetelmä ja laite sumutuksen estämiseksi paperikoneen viiraosalla
DE102005037644A1 (de) * 2005-08-05 2007-02-08 Voith Patent Gmbh Doppelsiebformer einer Maschine zur Herstellung einer Faserstoffbahn
US10201840B2 (en) * 2012-04-11 2019-02-12 Gpcp Ip Holdings Llc Process for cleaning a transport belt for manufacturing a paper web
SE2051044A1 (en) * 2020-09-04 2021-10-05 Valmet Oy Crescent former for producing tissue paper

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9417875U1 (de) * 1994-11-08 1995-01-05 J.M. Voith Gmbh, 89522 Heidenheim Vorrichtung zum Reinigen eines bewegten Siebes, insbesondere des umlaufenden Siebes einer Papiermaschine
DE19803591A1 (de) * 1998-01-30 1999-08-05 Voith Sulzer Papiertech Patent Doppelsieb-Former
DE10044907A1 (de) * 2000-08-11 2002-02-21 Voith Paper Patent Gmbh Konditionier- und/oder Reinigungsvorrichtung
DE10255471A1 (de) * 2002-11-28 2004-07-22 Voith Paper Patent Gmbh Doppelsiebformer einer Maschine zur Herstellung einer Faserstoffbahn und dazugehöriges Verfahren

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3842155A1 (de) * 1988-12-15 1990-06-21 Voith Gmbh J M Doppelsiebformer zur herstellung einer papierbahn
DE4328024A1 (de) * 1993-08-20 1995-02-23 Voith Gmbh J M Doppelsieb-Blattbildner
DE19651493A1 (de) * 1996-12-11 1998-06-18 Voith Sulzer Papiermasch Gmbh Siebpartie und Verfahren zum Formen einer mehrlagigen Faserstoffbahn
DE19704443A1 (de) * 1997-02-06 1998-08-13 Voith Sulzer Papiermasch Gmbh Verfahren und Papiermaschine zur Herstellung einer mehrlagigen Faserstoffbahn
DE10021320A1 (de) * 2000-05-02 2001-11-08 Voith Paper Patent Gmbh Doppelsiebformer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9417875U1 (de) * 1994-11-08 1995-01-05 J.M. Voith Gmbh, 89522 Heidenheim Vorrichtung zum Reinigen eines bewegten Siebes, insbesondere des umlaufenden Siebes einer Papiermaschine
DE19803591A1 (de) * 1998-01-30 1999-08-05 Voith Sulzer Papiertech Patent Doppelsieb-Former
DE10044907A1 (de) * 2000-08-11 2002-02-21 Voith Paper Patent Gmbh Konditionier- und/oder Reinigungsvorrichtung
DE10255471A1 (de) * 2002-11-28 2004-07-22 Voith Paper Patent Gmbh Doppelsiebformer einer Maschine zur Herstellung einer Faserstoffbahn und dazugehöriges Verfahren

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010091915A1 (fr) 2009-02-12 2010-08-19 Voith Patent Gmbh Formeur à double toile
DE102009000803A1 (de) 2009-02-12 2010-08-19 Voith Patent Gmbh Doppelsiebformer

Also Published As

Publication number Publication date
DE10255471A1 (de) 2004-07-22
DE50309799D1 (de) 2008-06-19
ATE394541T1 (de) 2008-05-15
EP1536062B1 (fr) 2008-05-07
ES2305405T3 (es) 2008-11-01

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