WO2013023899A1 - Toile - Google Patents

Toile Download PDF

Info

Publication number
WO2013023899A1
WO2013023899A1 PCT/EP2012/064845 EP2012064845W WO2013023899A1 WO 2013023899 A1 WO2013023899 A1 WO 2013023899A1 EP 2012064845 W EP2012064845 W EP 2012064845W WO 2013023899 A1 WO2013023899 A1 WO 2013023899A1
Authority
WO
WIPO (PCT)
Prior art keywords
screen
sectional area
cross
openings
inlet side
Prior art date
Application number
PCT/EP2012/064845
Other languages
German (de)
English (en)
Inventor
Werner Brettschneider
Christian Steinmassl
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 CN201290000740.XU priority Critical patent/CN204199103U/zh
Publication of WO2013023899A1 publication Critical patent/WO2013023899A1/fr
Priority to FIU20144029U priority patent/FI10522U1/fi

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 screen for the treatment of a pulp suspension suitable for producing a paper, board, tissue or other fibrous web having a multiplicity of screen openings, in which the smallest cross-sectional area is approximately the same size and the inlet-side cross-sectional area of the screen openings
  • Such screens are preferably used for wet screening of pulp suspensions to remove impurities present therein. As a rule, they are rigid and differ from flexible endless screens used in screen presses and paper machines.
  • Such screens should have a sorting characteristic z. B. by round openings between 0.8 and 30 mm, depending on the coarseness of the materials, is achievable.
  • the object of the invention is therefore to improve the sorting effect and / or throughput while ensuring the required screen stability.
  • this object is achieved in that a sieve opening with a large cross-sectional area on the inlet side is surrounded by more than four sieve openings with a smaller cross-sectional area on the inlet side.
  • the invention allows for the same throughput but also smaller minimum screen openings to improve the sorting effect.
  • the screen openings with the large cross-sectional areas on the inlet side provide turbulence, which also has a positive effect on the throughput and the maximum
  • Cross-sectional area is surrounded. With six screen openings optimum utilization, symmetrical arrangement and stability can best be realized.
  • the distances between adjacent screen openings can be the same.
  • the screen openings should have a circular cross-section and the screen openings with inlet side large cross-sectional area to the inlet side to expand conically.
  • the angle between the conical wall and the flow direction is advantageously between 30 and 60 °.
  • the center of the large cross-sectional area coincides with the center of the respective smallest cross-sectional area or the center of the large
  • Cross-sectional area is offset from the center of the smallest cross-sectional area.
  • the screen openings should be arranged regularly in several parallel rows of adjacent screen openings.
  • the density of the screen openings can usually be increased if adjacent rows of
  • the inlet-side surface of the screen can be formed profiled. This is relatively easy to apply by welding beads or by laser.
  • Such screens are flat, but they are also, for example
  • Figure 1 a + b a plan view of a Siebausonce each;
  • Figure 2 a partial cross section through a sieve
  • Figure 4 another Siebaustre.
  • the sieve may consist of one or more layers, wherein wear-resistant materials, in particular metal, are preferably used.
  • the sieve surface comprises a multiplicity of sieve openings 1, 2 arranged as uniformly as possible with the same minimum cross-sectional area to ensure the same sorting effect.
  • the cross-sectional area of all screen openings 1, 2 is formed by a circle.
  • cylindrical screen openings 1 and screen openings 2 which widen conically from a cylindrical section to the inlet side 5.
  • the conical extension creates screen openings 2 with inlet side large
  • Cross-sectional area which provides turbulence on the inlet side, thus improving the throughput.
  • all adjacent screen openings 1, 2 have the same distance (between the centers of the screen openings) to each other, which ensures effective utilization of the screen surface with high stability.
  • the screen openings 1, 2 are arranged in parallel rows 3,4.
  • the example flat level sieve is from the inlet side 5 forth from the
  • Pulp suspension flows through. Larger impurities are retained and can be removed on the inlet side 5, for example with a reamer.
  • the thickness of the screen here is between 3 and 30 mm
  • the cone 6 of the screen openings 2 has a depth of 0.5 to 5 mm.
  • the one for the sorting effect decisive smallest diameter of the screen openings 1, 2 is between 0.8 and 30 mm.
  • the screen openings 1 with a smaller cross-sectional area on the inlet side can have the same, cylindrical cross-section over the entire thickness of the screen. If necessary, this can be increased to the outlet side.
  • FIG. 1 shows this possible variants of an outlet side extension of
  • Cross-sectional area causes the screen openings 1, 2 are arranged offset in the parallel rows 3.4 to each other. Correspondingly, the rows 3, 4 do not intersect at right angles.
  • the distance between the center of a screen opening 2 with inlet side large cross-sectional area to the centers of the six surrounding screen openings 1 with a smaller cross-sectional area and between these six screen openings 1 is here for example the same size.
  • FIG. 1a While in FIG. 1a there is always a screen opening 1 with a smaller cross-sectional area on the inlet side between two screen openings 2, the sections designed in the same way are interrupted by areas in which only screen openings 1 with a smaller cross-sectional area can be found.
  • large Cross-sectional area matches the center of the large cross-sectional area with the center of the smallest cross-sectional area.
  • FIG. 3 shows two arrangements in which a sieve opening 2 with a large cross-sectional area on the inlet side is surrounded by eight sieve openings 1 with a smaller cross-sectional area on the inlet side.
  • the rows 3, 4 of screen openings 1, 2 intersect at right angles. Accordingly, the distance of a screen opening 2 with inlet side large cross-sectional area to the surrounding eight screen openings 1 with inlet side small cross-sectional area by way of example not the same size.
  • Figure 3a is always between two screen openings 2 with inlet side large cross-sectional area a screen opening 1 with inlet side smaller cross-sectional area.
  • the sections designed in the same way are likewise interrupted by areas in which only screen openings 1 with a smaller cross-sectional area on the inlet side can be found.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

L'invention concerne une toile destinée au traitement d'une suspension de matière fibreuse appropriée à la fabrication d'une bande de papier, de carton, de tissu ouaté ou d'une autre matière fibreuse, cette toile comportant une pluralité d'ouvertures (1, 2) qui présentent une aire de section minimale pratiquement identique et une aire de section côté entrée non identique. L'objectif de l'invention est d'améliorer l'effet de tri et/ou le débit tout en assurant la stabilité requise de la toile. À cet effet, une ouverture (2) de la toile présentant une grande aire de section côté entrée est entourée de plus de quatre ouvertures (1) présentant une aire de section côté entrée moins grande.
PCT/EP2012/064845 2011-08-15 2012-07-30 Toile WO2013023899A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201290000740.XU CN204199103U (zh) 2011-08-15 2012-07-30 滤筛
FIU20144029U FI10522U1 (fi) 2011-08-15 2014-02-12 Sihti

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011080953.8 2011-08-15
DE102011080953A DE102011080953A1 (de) 2011-08-15 2011-08-15 Sieb

Publications (1)

Publication Number Publication Date
WO2013023899A1 true WO2013023899A1 (fr) 2013-02-21

Family

ID=46601812

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/064845 WO2013023899A1 (fr) 2011-08-15 2012-07-30 Toile

Country Status (5)

Country Link
CN (1) CN204199103U (fr)
AT (1) AT13826U1 (fr)
DE (2) DE202011110440U1 (fr)
FI (1) FI10522U1 (fr)
WO (1) WO2013023899A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107552387A (zh) * 2017-09-28 2018-01-09 上海宝冶建设工业炉工程技术有限公司 原料振动筛

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0479203A1 (fr) * 1990-10-01 1992-04-08 Aikawa Iron Works Co., Ltd. Pulpeur pour la fabrication du papier
WO2010108746A1 (fr) 2009-03-27 2010-09-30 Voith Patent Gmbh Tamis

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0479203A1 (fr) * 1990-10-01 1992-04-08 Aikawa Iron Works Co., Ltd. Pulpeur pour la fabrication du papier
WO2010108746A1 (fr) 2009-03-27 2010-09-30 Voith Patent Gmbh Tamis

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107552387A (zh) * 2017-09-28 2018-01-09 上海宝冶建设工业炉工程技术有限公司 原料振动筛

Also Published As

Publication number Publication date
AT13826U1 (de) 2014-09-15
DE202011110440U1 (de) 2014-01-30
CN204199103U (zh) 2015-03-11
FI10522U1 (fi) 2014-06-17
DE102011080953A1 (de) 2013-02-21

Similar Documents

Publication Publication Date Title
DE102007020325B3 (de) Verfahren zur Herstellung eines Siebes für die Behandlung von zur Papiererzeugung geeigneten Faserstoffsuspensionen
EP2568078B1 (fr) Désintégrateur
EP2516733A1 (fr) Procédé et dispositif de tamisage pour le tamisage d'une suspension de matière fibreuse
EP2411577B1 (fr) Tamis
EP1895046B1 (fr) Dépulpeuse dotée d'une plaque perforée avec un maximum de bords de défibrage
EP2780505B1 (fr) Tamis
EP2751336B1 (fr) Tamis
WO2013023899A1 (fr) Toile
EP2751335B1 (fr) Tamis pour le traitement d'un fluide de liquide à pateux
EP2652195B1 (fr) Tamis
DE202016008505U1 (de) Stofflöser
WO2013149795A1 (fr) Tamis
AT13421U1 (de) Siebtrommel
DE102010063231A1 (de) Sieb
DE202007014091U1 (de) Sieb, insbesondere starres Sieb für die Behandlung von zur Papiererzeugung geeigneten Faserstoffsuspensionen
DE102007000645A1 (de) Sieb IV
EP2152962A1 (fr) Tamis
AT502437A1 (de) Filterelement

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201290000740.X

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12741327

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: ATGM 9012/2012

Country of ref document: AT

ENP Entry into the national phase

Ref document number: 90122012

Country of ref document: AT

Kind code of ref document: U

WWE Wipo information: entry into national phase

Ref document number: U20144029

Country of ref document: FI

122 Ep: pct application non-entry in european phase

Ref document number: 12741327

Country of ref document: EP

Kind code of ref document: A1