EP1215335B1 - Tamis sous pression pour l'épuration de pâte à papier contenant des impuretés - Google Patents

Tamis sous pression pour l'épuration de pâte à papier contenant des impuretés Download PDF

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Publication number
EP1215335B1
EP1215335B1 EP01122711A EP01122711A EP1215335B1 EP 1215335 B1 EP1215335 B1 EP 1215335B1 EP 01122711 A EP01122711 A EP 01122711A EP 01122711 A EP01122711 A EP 01122711A EP 1215335 B1 EP1215335 B1 EP 1215335B1
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EP
European Patent Office
Prior art keywords
screen element
grader according
housing
screen
pressure
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.)
Expired - Lifetime
Application number
EP01122711A
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German (de)
English (en)
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EP1215335A1 (fr
Inventor
Reimund Rienecker
Peter Schweiss
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
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Publication of EP1215335A1 publication Critical patent/EP1215335A1/fr
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Publication of EP1215335B1 publication Critical patent/EP1215335B1/fr
Anticipated expiration legal-status Critical
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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
    • D21D5/06—Rotary screen-drums
    • 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
    • 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
    • D21D5/023—Stationary screen-drums
    • D21D5/026—Stationary screen-drums with rotating cleaning foils

Definitions

  • the invention relates to a pressure sorter according to the preamble of claim 1.
  • Pressure sorters are used in the processing of paper fiber suspensions to process the pulp suspension in a wet sieving.
  • a pressure sorter contains at least one sieve element which is provided with a plurality of openings.
  • the fibers contained in the suspension are to pass through the openings, while the unwanted solid constituents are rejected therefrom and are led out of the sorter again.
  • sorting holes round holes are usually used or slots.
  • pressure sorters of the type considered here are provided with screen scrapers having reaming surfaces moved past the screen. As a result, clogging of the screen openings is prevented in a manner known per se.
  • From DE-C-197 02 044 is a vertical sifter for a pulp suspension known, which has two sieve elements in a single machine.
  • the material flow to be sorted first reaches the area of a flat preliminary screen, which is kept free on the inlet side with a reamer.
  • the passage through this flat pre-screen is then passed into the interior of a rotationally symmetrical screen basket, through the openings of the accepts passes, so that the suspended paper fibers can pass through this screen basket into the Gutstoffauslauf.
  • Such a sorter should be used in particular when the supplied pulp suspension is mixed with a larger amount of coarse impurities.
  • this is very common in recovered paper processing, especially in the case of the substance which originates directly from the pulper or after passage of a cleaning device removing only the very largest impurities.
  • this known sorter has the disadvantage that, in particular in the area of the flat pre-screen, high wear occurs and the coarse impurities can lead to malfunctions.
  • WO-A-00/58549 shows a sorter with a vertical housing, in which there are two sieve elements through which the paper fiber suspension to be cleaned flows in succession. In this case, the two sieve elements are at least partially pushed into each other axially, which allows a compact design.
  • Other versions with two through-flow sieves are known from EP-A-0 955 406 and DE-A-21 40 904.
  • the first sieve is cylindrical and is rotated.
  • these devices are unfavorable in many applications. This is especially true when processing coarse materials.
  • a cylindrical screen in particular has the disadvantage that the elongated, tending for spinning or winding impurities can easily create such a sieve and then be lashed in consequence of the rotation. They are then manually removable only after parking.
  • a flat disk-shaped sieve as known, for example, from WO-A-00/52260, has a simple structure and requires little space. However, it has only a small one Sieve surface, which is disadvantageous.
  • the invention is based on the object to build a pressure sorter so that it is insensitive to clogging impurities and at the same time provides a good sorting quality. He should be used in particular for dissolved waste paper, which still contains a large part of the originally contained, little crushed impurities.
  • a pressure sorter of the type according to the invention is particularly suitable for being used at the beginning of pulping, that is, where - still - a relatively large proportion of coarser impurities in the suspension is entrained. If e.g. Waste paper in a pulper or a dissolving drum brought into suspension, this often has an impurity content of more than 2% of the solid. Part of this contaminant is relatively coarse, so it is also rejected at a 4mm hole to large proportion.
  • the suspension After entering the pressure sorter according to the invention, the suspension hits the inlet side of the first sieve element. Its rotation generates a centrifugal force with which the impurities are thrown off the surface of this sieve element, if they are specifically heavier than the surrounding suspension.
  • Heavy parts which are dismissed as intended on the screen element, leave its inlet area relatively quickly and are removed by the coarse reject spout from the housing. You may also be able to carry light, rejected due to their size impurities, especially plastic films.
  • the sieve is not only less but it is not so easily clogged by pieces of wire, glass splinters and small stones.
  • the spin effect depends on the velocities and the radius at the point of interest.
  • the particular advantage of the invention is that the first sieve element is at least partially conical. A conical shape combines the advantages of a large sieve surface with sufficient centrifugal effect from the sieve area.
  • the combination according to the invention of the two differently operating sieve elements in a housing creates a compact machine which operates reliably even with heavily soiled liquids. It is also advantageous to be able to provide the first screening element and the scrapers for the second screening element with a common drive.
  • the pressure sorter according to the invention is easy to equip with an effectivechtschmutzaustrag. Styrofoam and foil pieces can already be concentrated and removed with the aid of centrifugal forces before they have passed the first sieve element. The same applies to air. This accumulation and discharge of light parts is favored by a flat or conical first sieve element.
  • Fig. 1 shows, albeit only schematically, the most important functional parts to Belong to the pressure sorter according to the invention.
  • the paper fiber suspension S is introduced into the housing through the inlet connection 3 and firstly reaches the inlet chamber 10.
  • the conical first screen element 1 is located in this housing. Its opening angle ⁇ is adapted to the requirements and is generally between 60 and 120 °.
  • An important feature of the invention is that in such a machine, the first screen element 1 can be set in rotation.
  • fixed Sieb thriftr 8 are indicated, which are located on the accept side of this screen element, ie on the downstream side and generate pressure pulses. The effect of such sieve clearers is known and need not be explained in detail.
  • the housing of the pressure sorter is constructed so that the passage A1 of the first screen element 1 can pass directly to the inlet side of the second screen element 2. Passage A2 passing through this screen element 2 is led away through the fine reject outlet 6 by the accepts outlet 4 and the rejected overflow R2. To keep free the second screen element 2 moving scraper 9 are provided, which are connected here to the rotor 24, that are driven at the same speed as the screen element 1. But it is quite conceivable that different speeds are beneficial. Then the first screen element 1 is to be driven by a further shaft (24 'in Fig. 3), e.g. would be within a rotor 26 to lead.
  • a cylindrical sieve also called a sieve basket
  • Such baskets provide both a large screen area, as well as high stability and easy clearing.
  • Pressure graders are no longer to be expected at this point by rough impurities. Therefore, a small screen perforation can be selected.
  • Fig. 2 the forces are qualitatively represented, which act on a solid particle 14, which is located in the vicinity of the sieve opening 12.
  • the centrifugal force 15 acts radially outwards and the drag force 16 in the direction of the sieve opening.
  • the centrifugal force 15 is large enough to produce a resultant 17 which removes the particulate matter 14 from the screen element 1.
  • Important for the sorting effect is the smallest diameter 13 of the sorting opening 12. In typical applications of the subject invention, this diameter is at least 4 mm, since this is a relatively coarse material.
  • a phase in the inlet region of the sorting openings 12 can improve the clogging behavior of the rotating screen element 1. Under certain circumstances, it makes sense to make the sorting openings of different sizes.
  • the pressure sorter according to the invention can also be a horizontal sorter, ie have a horizontal axis. This sometimes brings space advantages and can improve the discharge of heavy parts through the coarse reject spout 5, since gravity is supportive here.
  • the shape of the first sieve element plays, as already stated, an important role in determining the properties of the pressure sorter.
  • the first screen element 1 ' may have a plurality of sections whose opening angles ⁇ are different.
  • Optimal should be the cylindrical shape.
  • wing As a scraper to Sieve free are wing, Foils (Fig. 1, 3, 5) or provided with projections drum rotors (see Fig. 4 and 7) used.
  • the pressure sorter according to the invention already indicated in FIG. 1 is drawn somewhat more in detail in FIG. 7, without that figure being understood as a construction drawing.
  • the first sieve element 1 which is designed in a conical shape, divides the upper part of the housing into an inlet space 10, which communicates with the inlet connection 3 for the suspension. Of the screen openings 12 only part is shown.
  • Centrally located within the first sieve element 1 are a number of fixed Siebêtrn 8. These are connected at its bottom to the housing.
  • the two sieve elements are arranged so that the first sieve element 1 divides the upper part of the housing into the inlet space 10 and the first accepts space 11.
  • This first Gutstoffraum 11 located centrally within the first screen element 1 is in communication with the Zulaufraum to the second screen element 2.
  • the second screen element 2 in turn divides from the lower part of the housing from the Gutstoffraum 20, which communicates with the Gutstoffauslauf 4.
  • the inlet space of the second screen element 2 merges at its lower end into the reject space 22, which in turn is connected to the fine reject outlet 6.
  • the second screen element 2 is thus kept free of blockages on the rotor 24, which also drives the first screen element 1 is a drum 19 with it placed on scrapers 9 are.
  • the rotor 24 is expediently mounted on the fly, ie a strong, multi-part bearing 23 holds the rotor from below. In this way, the upper part of the rotor can remain free from storage, so that the spinning impurities located in the upper part of the sorter can not create, but can slide off centrally.
  • the Textilrejektauslauf 7 which here open and closed by a valve 18 intermittently can be.
  • a flow-guiding element 25 is indicated by way of example.
  • Such guide elements serve to keep the suspension which has flowed through the inlet connection 3 into rotation and / or to guide it radially inwards towards the screen plate. Since the first screen element 1 rotates during operation of the pressure sorter, it is also necessary to set the suspension in rotation so that it can flow through the screen openings 12 of the screen element.

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

Claims (25)

  1. Tamis sous pression pour l'enlèvement d'impuretés d'une suspension de fibre papier (S) contenant des impuretés avec un boîtier vertical ou horizontal, qui a au moins deux éléments de tamis sensiblement symétriques en rotation, qui sont disposés de telle sorte qu'ils peuvent être parcourus de façon successive par la suspension de substance fibreuse introduite par au moins une tubulure d'entrée (3) dans le boîtier,
    le premier élément de tamis (1, 1') côté aval pouvant être tourné,
    la partie de la suspension de fibre de papier (A2), qui a traversé également le second élément de tamis (2), est guidée par au moins un écoulement de pâte à papier (4) à nouveau à la sortie du boîtier et
    le boîtiers présentant au moins un écoulement de rejet grossier (5) pour le trop-plein (R1) produit sur le premier élément de tamis (1, 1') et au moins un écoulement de rejet fin (6) pour le trop-plein (R2) produit sur le second élément de tamis (2),
    caractérisé en ce que
    le premier élément de tamis (1, 1') a une forme conique avec un angle d'ouverture (α), qui se situe entre 10° et 170° et en ce que le premier élément de tamis (1, 1') est disposé axialement à l'extérieur et dans le cas d'un boîtier horizontal sur le côté à côté de l'espace et dans le cas d'un boîtier vertical au-dessus de l'espace dans lequel se trouve le second élément de tamis (2).
  2. Tamis sous pression selon la revendication 1,
    caractérisé en ce que
    le boîtier est vertical.
  3. Tamis sous pression selon la revendication 1 ou 2,
    caractérisé en ce que
    l'angle d'ouverture (α) se situe entre 60° et 120°.
  4. Tamis sous pression selon la revendication 1, 2 ou 3,
    caractérisé en ce que
    le second élément de tamis (2) côté aval est fixé dans le boîtier.
  5. Tamis sous pression selon la revendication 1, 2, 3 ou 4,
    caractérisé en ce que
    un écoulement de rejet léger (7) disposé de façon centrale se trouve dans l'espace d'arrivée (10) attribué au premier élément:de tamis (1, 1').
  6. Tamis sous pression selon la revendication 5,
    caractérisé en ce que
    l'écoulement de rejet léger (7) est terminé par une vanne (18) s'ouvrant brièvement automatiquement à des intervalles de temps.
  7. Tamis sous pression selon la revendication 5 ou 6,
    caractérisé en ce que
    le rotor (:24) entraînant le premier élément de tamis (1, 1') ne présente pas de logement sur l'extrémité axiale vers l'écoulement de rejet léger (7).
  8. Tamis sous pression selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le premier: élément de tamis (1) a une forme de double cône, les diamètres plus grands se situant sur les extrémités extérieures au plan axial.
  9. Tamis :sous pression selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le côté du cône est orienté avec le plus grand diamètre en direction du second élément de tamis (2).
  10. Tamis sous pression selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    des racleurs de tamis (8) fixes se trouvent sur le côté passage du premier élément de tamis (1, 1').
  11. Tamis :sous pression selon l'une quelconque des revendications 1 à 9,
    caractérisé en ce que
    des racleurs fixes se trouvent sur le côté arrivée du premier élément de tamis (1, 1').
  12. Tamis sous pression selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le côté arrivée du premier élément de tamis (1, 1') a une surface profilée.
  13. Tamis sous pression selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le côté entrée du premier élément de tamis (1, 1') est doté de baguettes.
  14. Tamis sous pression selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le premier élément de tamis (1, 1') est doté de trous ronds dont le diamètre est d'au moins de deux millimètres.
  15. Tamis sous pression selon la revendication 14,
    caractérisé en ce que
    les trous ronds présentent un diamètre d'au moins quatre millimètres.
  16. Tamis sous pression selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le premier élément de tamis (1, 1', 1") est doté d'orifices de tri qui ont une grandeur différente selon la position radiale sur l'élément de tamis.
  17. Tamis sous pression selon la revendication 16,
    caractérisé en ce que
    les orifices de tri disposés radialement davantage à l'extérieur sont plus grands que les orifices situés davantage à l'initérieur.
  18. Tamis sous pression selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les éléments de guidage d'écoulement (25), qui influencent le déplacement périphérique de la suspension se trouvant à l'intérieur, se trouvent dans l'espace d'arrivée (10) attribué au premier élément de tamis (1, 1').
  19. Tamis sous pression selon la revendication 20,
    caractérisé en ce que
    les éléments de guidage d'écoulement (25) présentent des surfaces incurvées, sur lesquelles l'écoulement périphérique est dévié radialement vers le centre.
  20. Tamis sous pression selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le second élément de tamis (2) est un panier à tamis cylindrique.
  21. Tamis:sous pression selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le second élément de tamis (2) est doté d'orifices de tri ronds, dont le diamètre est au maximum de deux millimètres.
  22. Tamis sous pression selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le second élément de tamis (2) est maintenu libre par des racleurs (9) déplacés qui font partie du rotor (24), lequel entraîne également le premier élément de tamis (1, 1').
  23. Tamis sous pression selon l'une quelconque des revendications 1 à 21,
    caractérisé en ce que
    le second élément de tamis (2) est maintenu libre par des racleurs (9) déplacés par un rotor (26) et en ce que le premier élément de tamis (1, 1') est entraîné avec un régime qui se différencie de celui de ce rotor (26).
  24. Tamis sous pression selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la tubulure d'entrée (3) débouche de façon tangentielle dans le boîtier.
  25. Tamis sous pression selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le plus grand diamètre intérieur du premier élément de tamis (1, 1') est supérieur à celui du second élément de tamis (2).
EP01122711A 2000-12-07 2001-09-21 Tamis sous pression pour l'épuration de pâte à papier contenant des impuretés Expired - Lifetime EP1215335B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10060822A DE10060822B4 (de) 2000-12-07 2000-12-07 Drucksortierer zum Entfernen von Störstoffen aus einer störstoffhaltigen Papierfasersuspension
DE10060822 2000-12-07

Publications (2)

Publication Number Publication Date
EP1215335A1 EP1215335A1 (fr) 2002-06-19
EP1215335B1 true EP1215335B1 (fr) 2006-08-30

Family

ID=7666143

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01122711A Expired - Lifetime EP1215335B1 (fr) 2000-12-07 2001-09-21 Tamis sous pression pour l'épuration de pâte à papier contenant des impuretés

Country Status (6)

Country Link
US (1) US6613191B2 (fr)
EP (1) EP1215335B1 (fr)
AT (1) ATE338158T1 (fr)
CA (1) CA2364728A1 (fr)
DE (2) DE10060822B4 (fr)
ES (1) ES2269267T3 (fr)

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SE9901148L (sv) * 1999-03-29 2000-06-12 Valmet Fibertech Ab Silanordning med ett roterbart och ett stationärt silorgan
DE10233364C1 (de) * 2002-07-23 2003-12-24 Voith Paper Patent Gmbh Drucksortierer zum Sieben einer Faserstoffsuspension
SE525785C2 (sv) * 2003-09-24 2005-04-26 Metso Paper Inc Förtjockare för koncentrering av fibersuspensioner
AT413110B (de) * 2003-10-15 2005-11-15 Andritz Ag Maschf Sortierer
JP2005171449A (ja) * 2003-12-15 2005-06-30 Aikawa Iron Works Co Ltd 製紙用スクリ−ン装置
ITVI20040230A1 (it) * 2004-09-29 2004-12-29 Comer Spa Epuratore perfezionato per la depurazione di sospensioni fibrose
FI117867B (fi) 2004-12-10 2007-03-30 Metso Paper Inc Lajitin ja menetelmä kuitumassan lajittelemiseksi
EP1749923B1 (fr) * 2005-08-04 2012-11-21 Voith Patent GmbH Dispositif pour traiter une suspension de fibres
US20070045157A1 (en) * 2005-08-29 2007-03-01 Kajzer Wieslaw C Recovery of pin chips from a chip washing reject stream
DE102006030905B3 (de) * 2006-07-04 2007-07-19 Voith Patent Gmbh Verfahren zur Abscheidung von Verunreinigungen aus einer Faserstoffsuspension
DE102006055316B3 (de) * 2006-11-23 2008-01-31 Voith Patent Gmbh Siebapparat für eine verschmutzte Faserstoffsuspension und seine Verwendung
US8869988B2 (en) * 2008-05-08 2014-10-28 M-I L.L.C. Cooling and classifying apparatus for pelletized product processing
US8118173B2 (en) * 2008-12-03 2012-02-21 Westlake Longview Corp. Streamer trap assembly
CN102189036B (zh) * 2010-03-15 2013-10-16 钦州鑫能源科技有限公司 离心跳汰机
CN105696400B (zh) * 2015-03-26 2018-04-03 潍坊信合达机械有限公司 一种造纸业用复合式压力筛
US10376924B2 (en) * 2017-02-23 2019-08-13 Frito-Lay North America, Inc. Separation apparatus with screen having fixed, non-uniform openings
WO2024079033A1 (fr) * 2022-10-12 2024-04-18 Andritz Fiedler Gmbh Trieuse, en particulier trieuse sous pression

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DE2140904C3 (de) * 1971-08-16 1974-05-09 Hermann Finckh, Metalltuch- Und Maschinenfabrik, 7410 Reutlingen Drucksortierer für Faserstoffsuspensionen
US4462901A (en) * 1981-12-28 1984-07-31 Gauld W Thomas Apparatus for screening fibrous stock
US4749475A (en) * 1986-10-23 1988-06-07 Uniweld, Inc. Two stage rotary pulp screening device
FI900273A (fi) * 1990-01-17 1991-07-18 Tampella Oy Ab Anordning foer utfaellning av fibermassa.
US5061370A (en) * 1990-03-20 1991-10-29 Quebec And Ontario Paper Company Ltd. Screening device for slurries with improved rotor and hub design
JP3066129B2 (ja) * 1991-08-29 2000-07-17 相川鉄工株式会社 製紙用除塵装置
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DE19702044C1 (de) * 1997-01-22 1998-04-16 Voith Sulzer Stoffaufbereitung Sichter für eine Faserstoffsuspension
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SE513794C2 (sv) * 1999-03-04 2000-11-06 Valmet Fibertech Ab Silanordning med roterande silskiva
SE9901148L (sv) * 1999-03-29 2000-06-12 Valmet Fibertech Ab Silanordning med ett roterbart och ett stationärt silorgan

Also Published As

Publication number Publication date
EP1215335A1 (fr) 2002-06-19
ATE338158T1 (de) 2006-09-15
CA2364728A1 (fr) 2002-06-07
DE10060822A1 (de) 2002-06-27
DE10060822B4 (de) 2006-04-27
DE50110868D1 (de) 2006-10-12
US20020069985A1 (en) 2002-06-13
ES2269267T3 (es) 2007-04-01
US6613191B2 (en) 2003-09-02

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