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WO2008131976A1 - Tamis - Google Patents

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Publication number
WO2008131976A1
WO2008131976A1 PCT/EP2008/051602 EP2008051602W WO2008131976A1 WO 2008131976 A1 WO2008131976 A1 WO 2008131976A1 EP 2008051602 W EP2008051602 W EP 2008051602W WO 2008131976 A1 WO2008131976 A1 WO 2008131976A1
Authority
WO
WIPO (PCT)
Prior art keywords
screen
sieve
recesses
layers
front side
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.)
Ceased
Application number
PCT/EP2008/051602
Other languages
German (de)
English (en)
Other versions
WO2008131976A8 (fr
Inventor
Wolfgang Gindele
Werner Brettschneider
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 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 DE102007020325A external-priority patent/DE102007020325B3/de
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Priority to EP08708858A priority Critical patent/EP2152962A1/fr
Priority to CA002685390A priority patent/CA2685390A1/fr
Priority to BRPI0811018-2A2A priority patent/BRPI0811018A2/pt
Priority to JP2010504587A priority patent/JP2010525186A/ja
Publication of WO2008131976A1 publication Critical patent/WO2008131976A1/fr
Priority to US12/608,141 priority patent/US8123912B2/en
Anticipated expiration legal-status Critical
Publication of WO2008131976A8 publication Critical patent/WO2008131976A8/fr
Priority to US13/272,962 priority patent/US8216428B2/en
Ceased legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D21D5/16—Cylinders and plates for screens

Definitions

  • the invention relates to a method for producing a sieve and a sieve for the treatment of a pulp suspension suitable for Faserstoffbahnerzeugung, which consists of at least two interconnected and apertures comprising sieve layers, wherein at least a portion of the apertures is arranged or is that through the Sieve leading sieve openings result.
  • Such screens are preferably used for wet screening of pulp suspensions to remove impurities present therein.
  • DE19547585 proposes a sieve with a support layer and a sorting layer.
  • the object of the invention is therefore to simplify the production of sieves with recesses or their structure. According to the invention, the object is achieved in that a part of the openings is or is arranged so that arise on the front of the screen not through the sieve going recesses.
  • the screen is made of three, four or more than four screen layers.
  • the cross-sectional profile of the sieve openings if they extend, for example, starting from the front side in the direction of flow or obliquely, can be made more continuous with a greater number of sieve layers, i. with little or no jumps.
  • the bonding of the screen layers should be as flat as possible and can be realized in particular by soldering, welding, screwing or gluing.
  • the recesses form grooves or blind holes.
  • the front side protruding Störelfn be fixed or be.
  • the spoiler bars can additionally be fastened to the sieve, for example screwed on.
  • This spoiler bars can support the für sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky sky .
  • the screen layers themselves are formed as disruptive bodies with the openings forming the recesses. As a result, the attachment of interfering bodies, in particular spoiler bars completely eliminated.
  • the recesses should form between 3 and 50%, preferably between 5 and 30%, of the surface of the screen in contact with the pulp suspension.
  • the screening layer forming the front of the screen should have a higher wear resistance than other screen layers in the interests of long life.
  • the screen layers have a thickness between 1 and 20 mm, preferably between 1 and 10 mm.
  • the sieve has a total thickness of between 4 and 100 mm, preferably between 6 and 50 mm.
  • the advantages in the production of the multi-layer sieve are optimally effective in comparison with sieves without sieve layers, if the sieve openings at the narrowest point have an extension between 1 and 20 mm, preferably between 4 and 20 mm.
  • Application can find the invention in flexible, but especially in rigid screens.
  • the screen layers should be made of the same material to minimize material cost and weight.
  • Figure 1 a partial section through a sieve with Störance 5;
  • FIG. 2 a plan view according to FIG. 1;
  • FIG. 3 shows a partial section through another sieve with recesses 4 and FIG. 4 shows a plan view according to FIG. 3.
  • the rigid, circular sieve of a sorter of an arrangement for processing a pulp suspension for a paper machine consists of several sieve layers 1.
  • an unillustrated, rotating Sieblaker is arranged in the flow direction in front of the screen.
  • screen layers 1 have a thickness between 1 and 5 mm and are soldered together. Before connecting the screen layers 1, however, perforations are punched into them, which form recesses 4 on the screen 2 coming into contact with the pulp suspension in front of the screen and continuous screen openings 3. While the recesses 4 in Figures 1 and 2 are formed only by the outer screen layer 1, this is done in the figures 3 and 4 by the outer two screen layers. 1
  • the screen forming the front side 1 is made of a very wear-resistant material.
  • the underlying screen layers 1 must ensure the stability of the screen and can in particular consist of cheaper and / or lighter material.
  • the screen openings 3 have at the narrowest point an extension between 4 and 20 mm.
  • the screen consists of three superimposed and two-dimensionally interconnected screen layers 1.
  • the recesses 4 are formed as grooves in which spoiler bars 5 are inserted. These elongate spoiler bars 5 project beyond the front side 2 of the screen and are intended to reduce wear on the screen, generate turbulence, remove contaminants from the center and form working edges for deflaking. About the recesses 4, the spoiler bars 5 already get a secure fixation on the screen. To reinforce the spoiler bars 5 are still connected by screws 6 with the sieve.
  • the sieve shown in FIGS. 3 and 4 consists of four superimposed sieve layers 1. Since the recesses 4 of two sieve layers 1 are formed here, they are also relatively deep.
  • the recesses form between 5 and 30% of the surface of the front side 2 of the screen which comes into contact with the pulp suspension.
  • This large extent of the recesses 4 makes it possible for the screen layers 1 to act as disruptive bodies themselves with the openings that form the recesses 4. In this way, the complex attachment of spoiler strips 5 can be omitted.
  • the screen openings 3 can be found here in and outside of the recesses 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

L'invention concerne un procédé de production d'un tamis et un tamis pour le traitement d'une suspension de fibres adaptée à la production de bandes de matière fibreuse, ledit tamis comprenant au moins deux couches liées et présentant des percées, au moins une partie des percées étant disposée de manière à donner des trous (3) traversant le tamis. Le but de l'invention est de simplifier la production du tamis. A cet effet, une partie des percées est disposée de manière à obtenir sur la face avant (2) du tamis des évidements (4) non débouchants et au moins les percées formant les évidements (4) sont réalisées dans les couches (1) de tamis avant la liaison de ces dernières.
PCT/EP2008/051602 2007-04-30 2008-02-11 Tamis Ceased WO2008131976A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP08708858A EP2152962A1 (fr) 2007-04-30 2008-02-11 Tamis
CA002685390A CA2685390A1 (fr) 2007-04-30 2008-02-11 Tamis
BRPI0811018-2A2A BRPI0811018A2 (pt) 2007-04-30 2008-02-11 Tela
JP2010504587A JP2010525186A (ja) 2007-04-30 2008-02-11 スクリーン
US12/608,141 US8123912B2 (en) 2007-04-30 2009-10-29 Screen
US13/272,962 US8216428B2 (en) 2007-04-30 2011-10-13 Screen

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102007020325A DE102007020325B3 (de) 2007-04-30 2007-04-30 Verfahren zur Herstellung eines Siebes für die Behandlung von zur Papiererzeugung geeigneten Faserstoffsuspensionen
DE102007020325.1 2007-04-30
DE102007000640 2007-11-07
DE102007000640.5 2007-11-07

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/608,141 Continuation US8123912B2 (en) 2007-04-30 2009-10-29 Screen

Publications (2)

Publication Number Publication Date
WO2008131976A1 true WO2008131976A1 (fr) 2008-11-06
WO2008131976A8 WO2008131976A8 (fr) 2010-04-01

Family

ID=39414940

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/051602 Ceased WO2008131976A1 (fr) 2007-04-30 2008-02-11 Tamis

Country Status (3)

Country Link
EP (1) EP2152962A1 (fr)
CA (1) CA2685390A1 (fr)
WO (1) WO2008131976A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0651091A1 (fr) * 1993-10-28 1995-05-03 Beloit Technologies, Inc. Tamis circulaire à surface ondulée avec des perforations fines
DE19547585A1 (de) * 1995-12-20 1996-12-05 Voith Sulzer Stoffaufbereitung Verfahren zur Herstellung eines Siebelementes sowie nach diesem Verfahren hergestelltes Siebelement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2515808Y2 (ja) * 1990-10-01 1996-10-30 相川鉄工株式会社 製紙用ストレーナ
DE10065930B4 (de) * 2000-12-22 2006-05-18 Voith Paper Patent Gmbh Verfahren zur Herstellung von Sieben, die zur Nasssiebung von Papierfasersuspensionen verwendbar sind

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0651091A1 (fr) * 1993-10-28 1995-05-03 Beloit Technologies, Inc. Tamis circulaire à surface ondulée avec des perforations fines
DE19547585A1 (de) * 1995-12-20 1996-12-05 Voith Sulzer Stoffaufbereitung Verfahren zur Herstellung eines Siebelementes sowie nach diesem Verfahren hergestelltes Siebelement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2152962A1 *

Also Published As

Publication number Publication date
EP2152962A1 (fr) 2010-02-17
CA2685390A1 (fr) 2008-11-06
WO2008131976A8 (fr) 2010-04-01

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