EP1247893A2 - Dispositif de tamisage pour l' épuration humide de pâte à papier - Google Patents

Dispositif de tamisage pour l' épuration humide de pâte à papier Download PDF

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Publication number
EP1247893A2
EP1247893A2 EP02002732A EP02002732A EP1247893A2 EP 1247893 A2 EP1247893 A2 EP 1247893A2 EP 02002732 A EP02002732 A EP 02002732A EP 02002732 A EP02002732 A EP 02002732A EP 1247893 A2 EP1247893 A2 EP 1247893A2
Authority
EP
European Patent Office
Prior art keywords
screening device
sieve
strips
screen plate
screening
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.)
Withdrawn
Application number
EP02002732A
Other languages
German (de)
English (en)
Other versions
EP1247893A3 (fr
Inventor
Werner Brettschneider
Jürgen Fey
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 Paper 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 Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1247893A2 publication Critical patent/EP1247893A2/fr
Publication of EP1247893A3 publication Critical patent/EP1247893A3/fr
Withdrawn legal-status Critical Current

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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 screening device according to the preamble of claim 1.
  • Such screening devices are used in stock preparation, e.g. B. in Sorter of the pulp and paper industry to the fiber-containing suspension in to treat a wet screening.
  • non-fibers are said to be Contamination due to their size retained on a sieve and then be deposited.
  • the fibers can together with some of the water Pass sorting openings.
  • Fabric dissolvers are also often provided with sieves that hold back paper that has not yet dissolved and coarse contaminants.
  • Such screens are mostly made of metal, e.g. alloy high quality Steel. They can be flat, cylindrical or frustoconical.
  • the US 2,737,086 shows sieve plates for paper machines that with the help of completely recessed strips screwed to a supporting structure are.
  • Such screens are subject to considerable wear in many applications. This stems primarily from the fact that e.g. with the use already mentioned in Paper fiber suspensions also have a certain dirt load in the range of Sieves. This dirt load can e.g. from metal parts, broken glass, sand or Stones exist. Since it is the task of these sieves to retain such dirt, they produce a considerable amount in cooperation with the clearer moving past Wear. Long armor has therefore been used for a long time wear-resistant materials, e.g. by cladding. In other cases finished wear strips attached to the screen plate. Such strips or In addition to the turbulence increase already mentioned, armor plating can also do that Protect the strainer from wear. Patches are e.g. from DE 195 06 084 A1 known.
  • the invention is based on the object of screening devices for wet screening To design paper fiber suspensions so that they are robust and wear-resistant. she should have a simple structure.
  • the screens contained therein are said to be easy to close to be assembled or exchanged.
  • the specified measures make it possible to remove the screen plate, be it from one Made in one piece or assembled from different segments, with simple ones To attach means to the support structure. Since the strips for the reasons mentioned are required anyway, these can also be used as fasteners for the Serve screen plate. It is advantageous if such strips made of a tough chrome steel can be produced as such a material best meets the strength requirements Fulfills.
  • the bar can be equipped with wear-resistant armor be provided.
  • the bar 3 is connected to the support structure 2 by screws 8 by a sieving device.
  • a finished screw connection is shown on the left and on the right the condition before inserting the bar.
  • the strips 3 are in the screen plate 1 of the Inserted from the front.
  • the front of the sieve is the one on which the suspension is attached Use of the sieve flows to the sieve openings.
  • the sieve by keeping blockers clear that a scraper is in the immediate vicinity of the Front of the sieve is moved past this. This direction of movement 10 of the scraper is indicated here by an arrow.
  • the screen plate 1 contains a plurality of sorting openings 7, three of which are here are visible. You have e.g. a circular cross section with a diameter d, which can be between 3 and 40 mm depending on the sorting task. Large diameter are used in pulper screens.
  • the screen plate 1 is for the preferred Use in waste paper processing relatively thick and therefore robust.
  • the thickness a should generally be at least 4, preferably 5 to 10 mm.
  • a groove 4 is machined vertically into the screen plate 1. she is drawn to its longitudinal extent cut so that the groove width b1 directly is visible. In the bottom of the groove 4 there is a bore 11 which extends into the underlying support structure 2 extends into it. A threaded bore 12 is located in the support structure 2.
  • the strip 3 is on one side of the groove 4, while it forms a gap on the other side. This The gap is explained by the fact that the strip width b2 of the strip 3 is somewhat smaller than the groove width b1 of the groove 4. The gap here lies on the flow side of the strip 3, while the opposite side of the bar 3 rests, so it is supported in a form-fitting manner. This is a big advantage because of the high forces when operating the machine.
  • the embodiment of the invention shown in Fig. 2 differs in 1 that the strip 3 at the point of separation between two sieve segments 1 'and 1' 'is attached.
  • bar 3 is using a screw 8 through the screen plate in the form of the screen segment 1 'with the Support structure 2 connected.
  • the head of the screw 8 can be covered with a cover disk 13 be provided.
  • the sieve segment 1 'shown on the left is at its segment boundary a level 11 provided. At this stage there is one in the appropriate place Bore 6 for the passage of the screw 8.
  • the support structure 2 is kept so wide that that it has a contact surface for two sieve segments 1 'and 1 "lying next to one another forms.
  • the construction shown in this Fig. 2 is particularly simple since there are such It is easier to produce steps at the segment boundaries than milled grooves, for example 1.
  • Fig. 3 is a solution that in Essentially corresponds to that in FIG. 2, drawn in perspective.
  • Fig. 4 is again a sectional view of part of the invention Screening.
  • both sieve segments have 1 'and 1 " two segment boundaries each have a level 11, the height h of which is the same.
  • Fig. 5 shows the screening device in supervision.
  • a screen plate is made up of a total eight sieve segments together, of which four sieve segments 1 ', 1 ", 1"', 1 "” are drawn are. The other four are missing, so that the support structure 2 is visible. It contains Screw holes 12 for the screws 8 of the strips.
  • the sieve segments can be on the inside and the outer circumference can also be screwed to the support structure 2.
  • Sorting openings 7 are shown without their size being shown to scale.
  • a radial Fixation of the sieve segments for a better explanation, the bar 3 in FIG.
  • Fig. 7 shows such a possibility bar 3 'used has a wider part 15 projecting over the sieve and one inserted narrower part 16.
  • the height of the narrower part 16 is less than that Thickness a of the screen plate 1, so that the screw 8 with the screen segments 1 ', 1 " Support structure 2 can brace.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Paper (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
EP02002732A 2001-04-02 2002-02-07 Dispositif de tamisage pour l' épuration humide de pâte à papier Withdrawn EP1247893A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10116367 2001-04-02
DE2001116367 DE10116367A1 (de) 2001-04-02 2001-04-02 Siebeinrichtung zur Nasssiebung von Papierfasersuspensionen

Publications (2)

Publication Number Publication Date
EP1247893A2 true EP1247893A2 (fr) 2002-10-09
EP1247893A3 EP1247893A3 (fr) 2003-07-30

Family

ID=7680086

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02002732A Withdrawn EP1247893A3 (fr) 2001-04-02 2002-02-07 Dispositif de tamisage pour l' épuration humide de pâte à papier

Country Status (2)

Country Link
EP (1) EP1247893A3 (fr)
DE (1) DE10116367A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102575421A (zh) * 2009-10-13 2012-07-11 沃依特专利有限责任公司 碎浆机
WO2013004506A1 (fr) * 2011-07-05 2013-01-10 Voith Patent Gmbh Tige indicatrice
CN112004967A (zh) * 2018-04-23 2020-11-27 福伊特专利有限公司 碎浆机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007039744A1 (de) * 2007-04-18 2008-10-23 Repa Boltersdorf Gmbh Pulper zum Recyceln eines Gemenges
DE102016202586A1 (de) 2016-02-19 2017-08-24 Voith Patent Gmbh Stofflöser

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE229797C (fr) *
US2423442A (en) * 1945-02-28 1947-07-08 Nat Lead Co Drum screen
US2727441A (en) * 1951-08-09 1955-12-20 Combined Locks Paper Company Pulp screens
US2737086A (en) * 1953-05-18 1956-03-06 Dustan Frank Screen plate
DE3925098C2 (de) * 1989-07-28 2000-12-14 Ask High Technology Tech Entwi Vorrichtung zum Zerkleinern von Material, sogenannter Turboseparator
DE19506084A1 (de) * 1995-02-22 1996-08-29 Lohse Verwaltungs Gmbh Siebeinheit zum Sortieren von Suspensionen
DE19649764C2 (de) * 1995-12-02 2000-11-30 Ask High Technology Tech Entwi Vorrichtung zum Zerkleinern von Material, insbesondere von Altpapier

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102575421A (zh) * 2009-10-13 2012-07-11 沃依特专利有限责任公司 碎浆机
CN102575421B (zh) * 2009-10-13 2016-12-07 沃依特专利有限责任公司 碎浆机
WO2013004506A1 (fr) * 2011-07-05 2013-01-10 Voith Patent Gmbh Tige indicatrice
CN112004967A (zh) * 2018-04-23 2020-11-27 福伊特专利有限公司 碎浆机
CN112004967B (zh) * 2018-04-23 2022-12-09 福伊特专利有限公司 碎浆机

Also Published As

Publication number Publication date
DE10116367A1 (de) 2002-10-17
EP1247893A3 (fr) 2003-07-30

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