WO2010124911A2 - Procédé de traitement d'une suspension de matière fibreuse et dispositif de tamisage permettant la mise en oeuvre dudit procédé - Google Patents

Procédé de traitement d'une suspension de matière fibreuse et dispositif de tamisage permettant la mise en oeuvre dudit procédé Download PDF

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Publication number
WO2010124911A2
WO2010124911A2 PCT/EP2010/053759 EP2010053759W WO2010124911A2 WO 2010124911 A2 WO2010124911 A2 WO 2010124911A2 EP 2010053759 W EP2010053759 W EP 2010053759W WO 2010124911 A2 WO2010124911 A2 WO 2010124911A2
Authority
WO
WIPO (PCT)
Prior art keywords
housing
rotor
sieve
screening device
rotation
Prior art date
Application number
PCT/EP2010/053759
Other languages
German (de)
English (en)
Other versions
WO2010124911A3 (fr
Inventor
Günter FRIEDHELM
Paul-Wilhelm Sepke
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 CN2010800295879A priority Critical patent/CN102459755A/zh
Priority to EP10710315A priority patent/EP2425052A2/fr
Publication of WO2010124911A2 publication Critical patent/WO2010124911A2/fr
Publication of WO2010124911A3 publication Critical patent/WO2010124911A3/fr

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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
    • D21D5/04—Flat screens
    • 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
    • D21D5/04—Flat screens
    • D21D5/046—Rotary screens

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • An effect of such a method is to clean the supplied pulp suspension of contaminants, in particular plastic films and heavy parts, and thereby preferably further dissolve, so to disassemble or shred at least part of the fiber webs and pieces of paper in individual fibers.
  • the process may also serve to prepare from an aqueous pulp suspension, e.g. may be recovered from waste paper to get out unwanted contaminants.
  • the waste paper contains, in addition to the desired pulps, a more or less large amount of impurities which are not intended to get into the paper.
  • multiple separations are required to remove the various contaminants at various stages of the conditioning process.
  • Suitable for the method screening devices have a housing with an interior in which the pulp suspension, driven by the rotor, can form a Umtriebswirbel. With advantage they are with a flat annular
  • Equipped sieve near which there is a rotor. They are often called secondary pulpers, fiberizers, fiber sorters or turbo-separators.
  • Other suitable sieving devices have a conical sieve or a cylindrical sieve. Still others have two sieves, z. B. a flat and another cylindrical sieve, wherein z. B. the cylindrical sieve of the overflow of the plane
  • the raw materials are mixed at the beginning of stock preparation in a pulper with water and so far crushed that they can be pumped as a suspension from the pulper. Even if in many cases a pre-cleaning already takes place in the pulper, a considerable amount remains of impurities in the pumped suspension and enters the equipment used for the treatment.
  • the sieve device on which this invention is based can be used, for example, to process the soiled suspension coming from the pulper. In this case, such a screening device (unlike the preceding pulper) can be operated closed. In this screening device so no direct solids entry takes place, but the pulp to be treated is supplied in already suspended form.
  • the screening device is also suitable for a pulp suspension originating from a pulper without having passed through a sieve.
  • the dissolution of the pulp is to be reinforced and / or the rejection of impurities with the lowest possible fiber losses are carried out.
  • the method should offer the possibility of further dissolving specks and pieces of paper in a waste paper suspension.
  • the subclaims 17 to 20 describe advantageous screening devices for carrying out the method.
  • a rotor flow with a circumferential component is generated by the rotor movement, which has an axis of rotation substantially concentric with the rotor axis.
  • This Umtriebsströmung is inventively not fitted concentrically in the housing but with offset in the radial direction of rotation axis. Due to this eccentricity of the Umtriebswirbel is no longer rotationally symmetric, which leads to larger
  • the centroids of the cross-sectional areas mentioned in claim 1 are exactly in the middle. Especially with cylindrical or conical housings, the measures required for the process are very easy to perform. For deviating shapes such. B. oval or partially overlapping circular surfaces, the centroids can be determined by known mathematical methods.
  • the method is used to advantage when the supplied pulp suspension is a waste paper suspension, e.g. With a consistency between 1% and 8%, preferably between 3% and 6%.
  • the screening device according to the invention is able to retain contaminants in the housing with the aid of the sieve and to remove them from the pulp suspension. Compared with the prior art, it also has the advantage that
  • Fig.1 +2 a schematically illustrated in two views for explaining the method screening device
  • 3 shows a sieve device according to the invention with a conical housing; 4 shows a variant with Rejekttauchrohr;
  • FIG.5-7 each a schematically illustrated system example
  • FIG. 8 shows a sieve device according to the invention with a conical sieve
  • FIG. 9 shows a screening device according to the invention with a cylindrical sieve
  • FIG. 10 shows a screening device according to the invention with two sieves connected in series
  • Fig.11 +12 each a special embodiment of flow barriers; - A -
  • FIG. 14 shows a special screening device with an axis of the rotor arranged obliquely with respect to the housing center line;
  • FIG. Fig.15 a special apparatus set-up with vertical in operation
  • the screening device shown very schematically in FIG. 1 has a closed essentially cylindrical housing 2, which is closed at the end faces. Connected tangentially via one here
  • a flat sieve 3 separates the interior of the housing 2 from an accepts chamber 9 attached to it, into which the part of the pulp suspension S which has passed the sieve passes. He is then discharged as a pass A through an accepts outlet 7 from the accept chamber 9. The on the sieve 3
  • a rotor 4 Near the screen 3 rotates at the inlet side of the screen 3, a rotor 4, whereby a Umtriebswirbel 5 is generated, which is indicated in Fig. 1 and Fig. 2 each by a hollow-headed arrow. It has a peripheral component (see Fig. 2), whose center of rotation extends substantially through the center line of the rotor 4, wherein in the technical reality certain deviations are possible. It is important that the axis of rotation 33 of the rotor 4 with respect to the center line 32 of the housing 2 has a distance V in the radial direction, which is advantageously at least 10%, preferably at least 20% of the inner diameter D2 of the housing 2.
  • Housing 2 and rotor 4 are preferably parallel, but it is also an inclination with an acute angle, z. B. possible with a maximum of 10 degrees.
  • the center of the drain line 6 is here on the axis of rotation 33 of the rotor 4. Another possible arrangement would be in the center line 32 of the
  • the rotor 4 is moved close to the screen 3, to keep it free of blockages. For this he can with a minimum distance from
  • Screen 3 may be arranged, the maximum of 30 mm, preferably a maximum of 10 mm is. These values also apply to the embodiments shown in further figures.
  • the sieves can be provided on the rotor side with screwed or welded strips, which significantly improves the Sieb limba and Entstippung.
  • FIG. 2 A measure for further improving the dissolution performance can be seen in FIG. 2 in the form of a flow barrier 11, which decelerates the buoyancy vortex and deflects the suspension S in the direction of the rotor 4. In addition, further shear forces can be generated in the pulp suspension.
  • the flow barrier 1 1 is located at a point on the inside of the housing 2, which is offset here by 180 ° relative to the center of the rotor 4, so it has the largest distance from this. In this area, the peripheral speed of the Umlenkswirbels is less than on the opposite side of the housing. In general, a single larger flow barrier at this point is preferable to a plurality of smaller ones arranged in a distributed manner.
  • the flow barrier 1 1 may be connected to the inner wall, z. B.
  • the flow barrier 11 is equipped particularly wear-resistant, which also applies to the immediate environment on the housing.
  • Fig. 3 shows a screening device in more detail, but without structural details.
  • the housing 2 ' here has a conical shape, which tapers towards the rotor 4. This brings especially with heavy parts in the pulp suspension S.
  • a rotor 4 is arranged, which can be rotated by a drive in rotation.
  • This rotor 4 serves both to generate the Umtriebsströmung and to keep the concentric with the rotor 4 arranged sieve 3 of blockages free.
  • the axis of rotation 33 of the rotor 4 and the center of the screen 3 have a radial distance V to the center line 32 of the housing 2 ' .
  • the sieve 3 divides the interior of the housing 1 from the adjoining accept chamber 9, from which the passage A accumulated therein can be discharged through the accepts outlet 7. In the lower part of the housing 1 is a downward leading
  • This embodiment also has a Flow barrier 11, which is positioned on the inside of the housing 2 ' at a location which is offset by 180 ° relative to the center of the rotor 4. Depending on the raw material, other positions may be useful.
  • the drain line 6 for the overflow R as shown in FIG. 4, be extended in the interior of the housing 2 ' in the direction of the rotor 4, so there have a dip tube 17.
  • Dip tube 17 stabilizes the Umtechnischswirbel 5 and can increase the selectivity of the screening device.
  • Sieve devices for carrying out the method can be installed upright (FIGS. 10 and 15), horizontally (for example, FIGS. 1 to 9) or at an angle. As a rule, they will be operated with overpressure, so that the contaminants escape by themselves. The overpressure can regulate the amount of contaminants removed. But it is also possible to provide the Störstoffaustritt with a shut-off device, not shown here, and, for. to open and close intermittently. Another possibility would be a metering device, which conveys a certain amount continuously out of the interior without blockage
  • the overflow R of the sifter 1 enters a post-sorter, e.g. a sorting drum 23, in which a separation between impurities 26 and pulp suspension 25 takes place. This fibrous suspension 25 can be recycled to the pulper 18.
  • Fig. 6 shows in a similar system, the discharge of a withdrawn before the sieve of the pulper 18, so not passed through the sieve polluted fiber suspension 27. It then passes through a settling tank 20 passes into an inventively operated screening device 1.
  • Pulpergutstoff 22 can be further treated either in a further conventional sorting or in a sorting according to the invention.
  • FIG. 7 shows a further example of the embodiment of the invention in which the pulp suspension S is cleaned in several, here three screening devices 38, 39 and 40.
  • these screening apparatus may be used in accordance with
  • Claims are operated or configured.
  • the overflow of the screening device 38 and 39 enters the inlet to the next screening device 39 or 40.
  • the passage of the last stage (screening device 40) is returned to the previous stage (screening device 39) and the overflow of the last stage is the reject.
  • Steps (screening devices 38 and 39) can be further processed as acceptances become.
  • FIG. 8 shows a sieve device for carrying out the method, in which instead of a flat sieve a conical sieve 3 ' , cleared by a likewise conical rotor 4 ' , is used.
  • this shape also has the advantage of better flow guidance and reduction of the risk of heavy parts in the rotor / screen area. Heavy parts are removed from this area faster by centrifugal forces.
  • the flow barrier 1 1 extends here in the axial direction beyond the outlet opening 12 for the heavy parts, whereby the vortex 37 (see Figure 13) for better
  • Deposition can be used. This measure is not limited to the screening device described in FIG. 8.
  • a cylindrical sieve 3 " as shown in FIG. 9, can also make enlargement of the sieve surface possible, and it is advantageous for it to flow in the centripetal direction, that is to say from radially outside to radially inward, as may be combined here with a flat sieve 3. It does not have to be used to create even more screen area, the screens are connected in parallel and the rotor 4 " has to be designed accordingly to keep the sieve or sieves free and to provide the required buoyancy in the housing.
  • the method according to the invention can also be carried out with a screening device which is provided with a plurality of screens, for which purpose FIG. 10 shows an advantageous example.
  • sorting devices are known from DE 37 01 400. They are also called Combisorter, Kombisorter or Endortierer.
  • the screening device 1 ' in Fig. 10 has a flat horizontally arranged screen 3, which is provided with a rotor 4, whose function has already been described.
  • the part of the housing 2 " in which the buoyancy vortex is generated by the rotor 4 is essentially cylindrical and has a center line 32 which runs parallel to the axis of rotation 33 of the rotor 4 and has a radial distance V opposite the latter rejected substances are not discharged directly from the housing 2 " , but initially passed through an opening 28 to an overflow sieve 29, which is a cylindrical screen basket here.
  • an overflow sieve 29 which is a cylindrical screen basket here.
  • the center of the rotor 4 and the middle of serving as overflow sieve 29 can Sieve basket as here on the same line or be offset against each other.
  • the screen basket is kept free of blockages by a clearing rotor 30.
  • the overflow R ' formed on the overflow sieve 29 is largely freed of fibers on the way up on the sieve surface and dewatered so that it emerges from the overhead reject chamber 31 as a reject suitable for disposal. Because of the requirement that this reject material R 'contains as few fibers as possible, the preceding defibration (speckle dissolution) improved with the aid of the invention is of particular advantage.
  • This screening device 1 ' also has a flow barrier 11 which brakes the rotation of the suspension S in the housing 2 " and reduces wear.
  • the defibration is improved, which further reduces the fiber losses on the overflow sieve 29.
  • the proportion that has passed the overflow sieve 29, passes into another accept chamber 34, can be discharged and used in accordance with its purity.
  • the screening device 1 ' shown in FIG. 10 is particularly well suited as the last sorting stage, that is to say as screening device 40.
  • the flow barrier 1 1 can be varied in shape and arrangement, to which the figures 11 and 12 show examples.
  • a flow barrier 1 1 (FIG. 1 1) is also conceivable with a convexly curved slope 35 on the discharge side in order to prevent or weaken the formation of local, possibly wear-increasing, eddies.
  • a similar effect can be there with a
  • FIG. 13 shows a favorable possibility of utilizing the vortex 37 generated by the flow barrier 11 in order to more easily guide the heavy parts into the outlet opening 12 provided for this purpose.
  • center line 32 of the housing 2, 2 ' or 2 may be selected parallel to the axis of rotation 33.
  • a small oblique angle ⁇ for example from 0 to 8, may also be used
  • the screening device Since in this method the screening device is preferably operated in a closed system, it does not contain an open entry opening (for the pulp). Therefore, a horizontal, vertical or inclined installation of this machine is possible in principle. For practical reasons, in particular because of the better heavy part rejection from the screen area and the better
  • a horizontal center line installation 32 of the housing (see eg Fig. 3) is selected.
  • Fig. 15 shows an installation example with a vertical center line 32 ' and a vertical axis of rotation 33 "of the rotor 4.
  • Such a measure may be expedient, for example because of special space conditions
  • Heavy parts (here with a heavy-duty sluice attached to it) is then also attached to a lowest possible point of the housing 2 ' .

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

Abstract

Procédé de traitement de suspensions (S) de matière fibreuse dans un dispositif de tamisage qui comporte un carter fermé (2) contenant un tamis (3) sur lequel une partie des matières introduites avec la suspension (S) de matière fibreuse est rejetée et évacuée du dispositif de tamisage en tant que trop-plein (R), tandis qu'une autre partie passe à travers le tamis (3) et est évacuée en tant que substance tamisée (A). Un rotor (4), dont l'axe de rotation (33) présente un écart radial (V) par rapport à la ligne médiane (32) du carter (2), produit dans ledit carter (2) un tourbillon d'agitation rotatif (5). L'effet de désagrégation dudit dispositif de tamisage s'en trouve accru et/ou l'effet de tri s'en trouve amélioré.
PCT/EP2010/053759 2009-04-30 2010-03-23 Procédé de traitement d'une suspension de matière fibreuse et dispositif de tamisage permettant la mise en oeuvre dudit procédé WO2010124911A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2010800295879A CN102459755A (zh) 2009-04-30 2010-03-23 用于处理纤维悬浮液的方法及实施该方法的筛分装置
EP10710315A EP2425052A2 (fr) 2009-04-30 2010-03-23 Procédé de traitement d'une suspension de matière fibreuse et dispositif de tamisage permettant la mise en oeuvre dudit procédé

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009019664.1 2009-04-30
DE200910019664 DE102009019664A1 (de) 2009-04-30 2009-04-30 Verfahren zur Behandlung einer Faserstoffsuspension sowie Siebvorrichtung zu seiner Durchführung

Publications (2)

Publication Number Publication Date
WO2010124911A2 true WO2010124911A2 (fr) 2010-11-04
WO2010124911A3 WO2010124911A3 (fr) 2010-12-23

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PCT/EP2010/053759 WO2010124911A2 (fr) 2009-04-30 2010-03-23 Procédé de traitement d'une suspension de matière fibreuse et dispositif de tamisage permettant la mise en oeuvre dudit procédé

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EP (1) EP2425052A2 (fr)
CN (1) CN102459755A (fr)
DE (1) DE102009019664A1 (fr)
WO (1) WO2010124911A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021180090A1 (fr) * 2020-03-09 2021-09-16 安德里茨（中国）有限公司 Tamis de pompage et système de criblage de pompage

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8973759B2 (en) 2011-03-17 2015-03-10 Ricoh Company, Ltd. Sieving device, sieving device for developing device, and powder-charging device
EP2500111B8 (fr) * 2011-03-17 2022-04-13 Ricoh Company, Ltd. Dispositif de tamisage
CN107012711B (zh) * 2017-05-02 2018-11-16 江苏信息职业技术学院 一种造纸工厂用纸浆过滤装置
CN113584923A (zh) * 2021-09-01 2021-11-02 安德里茨（中国）有限公司 筛浆机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3701400A1 (de) 1986-02-18 1987-10-08 Voith Gmbh J M Sortiereinrichtung fuer fasersuspensionen
WO2008061582A1 (fr) 2006-11-23 2008-05-29 Voith Patent Gmbh Appareil de tamisage pour suspension encrassée de fibres et utilisation de cet appareil

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
DE844116C (de) * 1947-12-08 1952-07-17 Leje & Thurne Aktiebolag Zerkleinerungsmaschine zur Behandlung von Zellstoff und/oder Altpapier
DE1122361B (de) * 1959-02-17 1962-01-18 Rudolf Winter Stoffloeser
CH568446A5 (fr) * 1973-08-27 1975-10-31 Escher Wyss Gmbh
EP1170417A1 (fr) * 2000-07-07 2002-01-09 Voith Paper Patent GmbH Procédé pour la réduction en pâte et l'épuration de vieux papiers contenant des impuretés
DE102005026108A1 (de) * 2005-06-07 2006-12-14 Voith Patent Gmbh Stofflöser zur Zerkleinerung und Suspendierung von Papierstoff
EP1777339B1 (fr) * 2005-10-19 2010-10-06 Voith Patent GmbH Dispositif de tamisage pour pâte à papier
DE102006000514A1 (de) * 2006-12-12 2008-06-19 Voith Patent Gmbh Stofflöser zur Zerkleinerung und Suspendierung von Papierstoff sowie seine Verwendung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3701400A1 (de) 1986-02-18 1987-10-08 Voith Gmbh J M Sortiereinrichtung fuer fasersuspensionen
WO2008061582A1 (fr) 2006-11-23 2008-05-29 Voith Patent Gmbh Appareil de tamisage pour suspension encrassée de fibres et utilisation de cet appareil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021180090A1 (fr) * 2020-03-09 2021-09-16 安德里茨（中国）有限公司 Tamis de pompage et système de criblage de pompage

Also Published As

Publication number Publication date
EP2425052A2 (fr) 2012-03-07
CN102459755A (zh) 2012-05-16
WO2010124911A3 (fr) 2010-12-23
DE102009019664A1 (de) 2010-11-04

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