WO2018104110A1 - Ensemble de pressage - Google Patents

Ensemble de pressage Download PDF

Info

Publication number
WO2018104110A1
WO2018104110A1 PCT/EP2017/080668 EP2017080668W WO2018104110A1 WO 2018104110 A1 WO2018104110 A1 WO 2018104110A1 EP 2017080668 W EP2017080668 W EP 2017080668W WO 2018104110 A1 WO2018104110 A1 WO 2018104110A1
Authority
WO
WIPO (PCT)
Prior art keywords
press
fibrous web
roll
belt
transfer
Prior art date
Application number
PCT/EP2017/080668
Other languages
German (de)
English (en)
Inventor
Johann Moser
Original Assignee
Voith 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 Patent Gmbh filed Critical Voith Patent Gmbh
Priority to EP17811885.7A priority Critical patent/EP3548664B1/fr
Priority to CN201780072914.0A priority patent/CN109996922B/zh
Priority to FIEP17811885.7T priority patent/FI3548664T3/fi
Publication of WO2018104110A1 publication Critical patent/WO2018104110A1/fr

Links

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
    • 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

Definitions

  • the invention relates to a press arrangement for dewatering a paper, cardboard, tissue or another fibrous web in a machine for producing and / or finishing the same with a suction belt, which is wound around by an endlessly circulating, water-absorbing and air-permeable dewatering belt and the outer fibrous web following in the web running direction, of a smooth, endless circulating transfer belt, cylindrical central roll, which is involved in the formation of at least one press nip with a, surrounded by an endlessly circulating water-absorbing dewatering belt press roll, wherein the transfer belt takes the fibrous web of the dewatering of the suction roll ,
  • Such press arrangements are known and offer because of their compactness in addition to space and cost advantages.
  • the object of the invention is therefore to ensure efficient drainage with safe web guidance.
  • this object is achieved in that the suction roll forms a transfer press nip with a transfer press roll, through which the dewatering belt of the suction roll and the transfer belt run together with the intermediate fibrous web.
  • the transfer press nip ensures safe web transfer from the dewatering belt to the much smoother, non-permeable transfer belt.
  • the dewatering belt should also be led away from the fibrous web immediately after the transfer press nip in order to prevent rewetting of the fibrous web, so that the fibrous web is guided from the transfer press nip to the central roll alone by the transfer belt.
  • the transfer belt between the transfer press nip and the central roll runs perpendicular or in the web running direction at most up to 35 ° inclined to the vertical.
  • the drainage can be supported by an increased viscosity due to heating of the fibrous web.
  • the fibrous web between the transfer press nip and the central roll should be acted upon by a steam blower box with steam.
  • At least one press nip of the cylindrical central roll should be made longer.
  • the extended press nip is formed in a known manner by a shoe press roll having a flexible roll shell, which runs in the region of the press nip on a contact shoe with concave pressing surface. It is usually sufficient to limit the effort only the last press nip of the central roll run extended. However, the drainage performance can be optimized when both press nips of the central roll are formed extended.
  • the central roller also provides sufficient space for the realization of several press nips, this should have a diameter of at least 100 cm, preferably at least 160 cm.
  • this should form a press nip, preferably the first press nip of the press assembly, with a press roll wrapped around by an endlessly circulating, water-absorbing dewatering band. Because of the still relatively high moisture content of the fibrous web, this low pressing forces are sufficient.
  • the fibrous web in the wrap area of the suction roll is assigned a steam blower box before the transfer press nip.
  • the dewatering belt of the suction roll should take over the fibrous web from an endlessly circulating belt, preferably a forming screen of an upstream former for sheet formation and / or the fibrous web after the central roll from the transfer belt to an endlessly circulating belt, preferably an air-permeable drying wire of a following drying unit Machine to be handed over.
  • the fibrous web between the former and the drying unit is constantly guided by at least one belt.
  • the drainage can be further supported by the fact that the forming fabric is passed through a pre-press nip together with an endlessly circulating, water-absorbing dewatering belt and the intermediate fibrous web prior to the delivery of the fibrous web.
  • This pressing arrangement is used for dewatering a fibrous web 1, in particular a board web in a paper machine for producing the same.
  • the smooth transfer belt produces a good board surface, so that a usually subsequent Offestpresse can be omitted.
  • the fibrous web 1 is transferred from the water-permeable forming fabric 22 to a water-permeable and air-permeable dewatering belt 4 of the subsequent pressing assembly.
  • the Formiersieb 22 is performed together with a water-absorbing dewatering belt 23 and the intermediate fibrous web 1 through a pre-press nip formed by two press rolls 24,25.
  • the dewatering belt 4 which takes over the fibrous web 1 from the forming fabric 22 is arranged above it and guides the fibrous web 1 together with a dewatering belt 19 running under the fibrous web 1 through a first press nip 11.
  • the first press nip 11 is formed by a lower cylindrical press roll 20 and an overlying suction roll 2.
  • the press roll 20 may also be a shoe press roll.
  • the fibrous web 1 is transferred from the upper dewatering belt 4 to an arranged under the fibrous web 1, water-impermeable and smooth transfer belt 6.
  • the dewatering belt 4, the transfer belt 6 and the intermediate fibrous web 1 are guided through a transfer press nip 12, which is formed by the suction roll 2 and a cylindrical press roll 7.
  • This transfer belt 6 leads the uppermost fibrous web 1 around a central roller 3 which rotates under the transfer belt 6 and, following the looping of the central roller 3, transfers it to an upper, endlessly circulating and air-permeable dryer 21 of a following drying unit of the paper machine.
  • the following drying unit is formed by a drying group, in which the fibrous web 1 is supported for drying by the drying wire 21, alternately guided over heated drying cylinders 26 and guide rollers 27.
  • the fibrous web 1 between the former and the drying unit is constantly guided by at least one band 4,6, which makes the web guide very stable even at high machine speeds and high basis weights of the fibrous web 1.
  • the clear distance between the suction roll 2 and the central roll 3 is between 250 and 2,000 mm. Due to the decoupling of both rollers 2,3, the structure of the press arrangement is simplified considerably. The distance is particularly necessary because contact of the central roller 3 with the suction roller 2 because of the press roller 7 is not feasible.
  • the transfer belt 6 In order to guide the fibrous web 1 between the suction roll 2 and the central roll 3 securely on the transfer belt 6, the transfer belt 6 extends in this section perpendicular or as shown in the figure slightly inclined in the machine direction to the vertical.
  • the fibrous web 1 between the transfer press nip 12 and the central roller 3 is again acted upon by a steam blower box 8 with steam.
  • the cylindrical central roller 3 is relatively large with a diameter of over 160 cm, so that two further press gaps 13, 14 can be formed in the looping area of the transfer belt 6 with the outer fibrous web 1.
  • the first press nip 13 in the web running direction 5 is formed between the central roll 3 and a cylindrical press roll 17 looped around by a separate dewatering belt 15.
  • the second subsequent press nip 14 is executed extended.
  • Shoe press rolls 18 generally consist of a flexible roll shell, which runs in the region of the extended press nip 14 via a contact shoe with concave pressing surface.
  • the endlessly circulating dewatering belts 4, 15, 16, 19, 23 serve to receive and remove the water pressed out of the fibrous web 1 in the respective press nip 10, 1, 12, 13, 14 and are usually designed as press felts.
  • the takeover of the fibrous web 1 is often supported by a, drawn by the acquiring dewatering belt 4 or drying wire 21, sucked guide roller 28,29.
  • the evacuated guide roll 28,29 has this purpose a perforated roll shell, the interior of which is connected to a vacuum source.

Landscapes

  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Finger-Pressure Massage (AREA)

Abstract

L'invention concerne un ensemble de pressage, destiné à déshydrater une bande de papier, de carton, de tissu ou une autre bande de matière fibreuse (1) dans une machine de production et/ou façonnage de celle-ci, comprenant un rouleau aspirant (2) entouré par une bande de déshydratation (4) à circulation sans fin, absorbant l'eau et perméable à l'air ainsi que par la bande fibreuse extérieure (1), et un rouleau central cylindrique (3) situé en aval par référence à la direction de défilement (5) de la bande, entourée par une bande de transfert lisse (6) à circulation sans fin et prenant part à la formation d'au moins une emprise de pressage (13, 14) avec un rouleau de pressage (17, 18) entouré par une bande de déshydratation (15, 16) absorbant l'eau et à circulation sans fin. La bande de transfert (6) reprend la bande de matière fibreuse (1) de la bande de déshydratation (4) du rouleau aspirant (2). Selon l'invention, une déshydratation ménageant le volume sera atteinte avec une surface de bande la plus lisse possible du fait que le rouleau aspirant (2) forme avec un rouleau de pressage et de transfert (7) une emprise de pressage et de transfert (12) à travers laquelle la bande de déshydratation (4) du rouleau aspirant (2) et la bande de transfert (6) passent conjointement avec la bande de matière fibreuse intermédiaire (1).
PCT/EP2017/080668 2016-12-05 2017-11-28 Ensemble de pressage WO2018104110A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP17811885.7A EP3548664B1 (fr) 2016-12-05 2017-11-28 Ensemble de pressage
CN201780072914.0A CN109996922B (zh) 2016-12-05 2017-11-28 压榨装置
FIEP17811885.7T FI3548664T3 (fi) 2016-12-05 2017-11-28 Puristinjärjestely

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016123433.8 2016-12-05
DE102016123433.8A DE102016123433B4 (de) 2016-12-05 2016-12-05 Pressanordnung

Publications (1)

Publication Number Publication Date
WO2018104110A1 true WO2018104110A1 (fr) 2018-06-14

Family

ID=60654938

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/080668 WO2018104110A1 (fr) 2016-12-05 2017-11-28 Ensemble de pressage

Country Status (5)

Country Link
EP (1) EP3548664B1 (fr)
CN (1) CN109996922B (fr)
DE (1) DE102016123433B4 (fr)
FI (1) FI3548664T3 (fr)
WO (1) WO2018104110A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022127695A1 (de) 2022-10-20 2024-02-29 Voith Patent Gmbh Maschine und Verfahren zur Herstellung oder Behandlung einer Wellpappenrohpapierbahn mit verkürzten Trockensieben
DE102023101607A1 (de) 2023-01-24 2024-03-07 Voith Patent Gmbh Maschine zur Herstellung oder Behandlung einer Faserstoffbahn
DE102023101610A1 (de) 2023-01-24 2024-06-13 Voith Patent Gmbh Maschine und Verfahren zur Herstellung oder Behandlung einer Faserstoffbahn

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0107606A2 (fr) * 1982-09-29 1984-05-02 Beloit Corporation Procédé de transfert d'une nappe de papier
CA1277166C (fr) * 1985-02-18 1990-12-04 Osmo Skytta Section de presse a zones d'essorage distinctes dans une machine a papier, et methode d'essorage du tissu a l'aide dudit agencement
EP1342837A2 (fr) * 2002-03-07 2003-09-10 Voith Paper Patent GmbH Dispositif de pressage
DE102007021051A1 (de) * 2007-05-04 2008-11-06 Voith Patent Gmbh Pressanordnung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004021051B3 (de) * 2004-04-29 2005-11-10 Infineon Technologies Ag DRAM-Speicherzellenanordnung nebst Betriebsverfahren
FI121146B (fi) * 2008-06-19 2010-07-30 Metso Paper Inc Rainanmuodostuskone ja menetelmä rainanmuodostuskoneessa
BR112014013929B1 (pt) * 2011-12-08 2022-01-04 Voith Patent Gmbh Cinta de prensa e máquina para fabricação de folha contínua de material fibroso especialmente papel tissue

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0107606A2 (fr) * 1982-09-29 1984-05-02 Beloit Corporation Procédé de transfert d'une nappe de papier
CA1277166C (fr) * 1985-02-18 1990-12-04 Osmo Skytta Section de presse a zones d'essorage distinctes dans une machine a papier, et methode d'essorage du tissu a l'aide dudit agencement
EP1342837A2 (fr) * 2002-03-07 2003-09-10 Voith Paper Patent GmbH Dispositif de pressage
DE102007021051A1 (de) * 2007-05-04 2008-11-06 Voith Patent Gmbh Pressanordnung

Also Published As

Publication number Publication date
EP3548664A1 (fr) 2019-10-09
CN109996922B (zh) 2020-12-25
FI3548664T3 (fi) 2023-06-05
DE102016123433B4 (de) 2019-01-10
DE102016123433A1 (de) 2018-06-07
CN109996922A (zh) 2019-07-09
EP3548664B1 (fr) 2023-03-08

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