EP2202052A1 - Procédé et dispositif destinés à drainer et disperser une matière fibreuse - Google Patents

Procédé et dispositif destinés à drainer et disperser une matière fibreuse Download PDF

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Publication number
EP2202052A1
EP2202052A1 EP09015772A EP09015772A EP2202052A1 EP 2202052 A1 EP2202052 A1 EP 2202052A1 EP 09015772 A EP09015772 A EP 09015772A EP 09015772 A EP09015772 A EP 09015772A EP 2202052 A1 EP2202052 A1 EP 2202052A1
Authority
EP
European Patent Office
Prior art keywords
screw
dewatering
plug screw
pulp
plug
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.)
Granted
Application number
EP09015772A
Other languages
German (de)
English (en)
Other versions
EP2202052B1 (fr
Inventor
Friedrich Hoppl
Alexander Dipl. Ing. Gscheider
Peter Dipl. Ing. Janisch
Gerhard Knes
Gernot Weilharter
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.)
Andritz AG
Original Assignee
Andritz AG
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Filing date
Publication date
Application filed by Andritz AG filed Critical Andritz AG
Publication of EP2202052A1 publication Critical patent/EP2202052A1/fr
Application granted granted Critical
Publication of EP2202052B1 publication Critical patent/EP2202052B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/121—Screw constructions
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/004—Methods of beating or refining including disperging or deflaking

Definitions

  • the invention relates to a method for dewatering and dispersing a pulp, in particular a paper pulp, in which the pulp is fed to a Disperger for dispersion via a plug screw and a feed screw directly adjacent to the plug screw. It also relates to a device for carrying out the method.
  • Such a method and such a device are for example from the AT 411 604 B known.
  • the pre-dewatered pulp suspension to be treated is dehydrated in a screw press and fed to a disperser via a shaft of a plug screw or, subsequently, a feed screw.
  • the task of a plug screw is to produce before the Disperger from the pulp a plug, which serves as a vapor barrier. This vapor barrier is necessary so that steam that is fed in Disperger or a feed screw before the Disperger, can not escape in the direction of screw extruder.
  • the pre-dewatering in front of the screw press is usually carried out by disc filters, belt presses, disc presses or drum thickeners.
  • the final dewatering via the screw press before the disperser has the disadvantage that the achievable degree of dewatering of the pulp suspension is limited or can be compensated by the dewatering in the screw press consistency fluctuations of the pulp difficult. It would therefore be desirable to be able to improve the dewatering of the pulp suspension prior to dispersion without, however, having to expend additional energy.
  • the aim of the invention is to propose a method with which an improved compared to the prior art drainage is enabled and this with the same energy consumption.
  • the method according to the invention is characterized in that the pulp is first pre-dewatered in a dewatering unit in front of the stuffing screw and then additionally dewatered in the stuffing screw.
  • the pulp is very strongly compressed or compressed to produce the plug in the plug screw. This pressure is used within the scope of this invention for additional drainage without the need for additional energy. Ideally, energy can be saved compared to conventional systems. Due to the additional dewatering in the plug screw, the dry content can be increased and consistency fluctuations of the fiber can be compensated. Alternatively, a possibly upstream screw press can be made smaller and therefore more energy-efficient (lower dry-run content necessary as the dewatering screw can raise it to the desired value).
  • the pre-dewatering of the pulp can be carried out before the stuffing screw with a disc filter, wherein a direct subsequent dewatering step is performed with the plug screw. So no further dewatering steps are carried out between the disc filter and the plug screw. A screw press in front of the screw conveyor is therefore no longer provided in this embodiment, resulting in significant energy and cost savings.
  • the pre-dewatered pulp is dewatered via drainage openings in a plug screw housing.
  • the resulting filtrate can then be easily collected via a Filtratwanne under the plug screw.
  • the pre-dewatered pulp can also be dewatered via drainage openings in a plug screw hollow shaft.
  • the filtrate can be well discharged via the hollow shaft.
  • the pulp is dewatered from both sides, ie via the drainage openings in the plug screw housing and via the drainage openings in the plug screw hollow shaft.
  • the pulp after the stuffing screw steam preferably in the feed screw, is supplied.
  • the pulp is heated and thereby improves the dispersion in Disperger.
  • the invention also provides a corresponding device for dewatering and dispersion of a pulp with a plug screw, a feed screw and a disperser, wherein the plug screw is connected directly to the feed screw and the feed screw is arranged directly in front of the disperser.
  • the plug screw on drainage openings for dewatering of the pulp, wherein before the plug screw, a dewatering unit for pre-dewatering of the pulp is arranged.
  • the dewatering unit for pre-dewatering a disc filter, wherein after the disc filter directly the stuffing screw is arranged. So no further dewatering units, such as a screw press, are arranged in front of the stuffing screw. The absence of a screw press leads to significant energy and cost savings.
  • the drainage openings are arranged in the plug screw housing.
  • the drainage openings for maintenance and cleaning work are easily accessible.
  • the drainage openings are provided in the region of the plug screw housing, in which the Faserstoffpfropfen forms during operation, since there prevail the highest dewatering pressures.
  • the drainage openings are arranged in the hollow shaft shell of the stuffing screw hollow shaft. As a result, the filtrate can be removed particularly easily through the hollow shaft.
  • the drainage holes may be provided both in the plug screw housing and in the hollow shaft.
  • a system according to the prior art is shown.
  • the pulp to be treated is pre-dewatered in a pre-dewatering device 11 1 and fed to a screw press 7 for further dewatering.
  • the pre-dewatering device 11 can be formed by a disk filter 11 'or by a belt press, a disk press or a drum thickener.
  • the screw press 7 is driven by the screw press drive 8.
  • the dewatered pulp falls through the shaft 6 in the underlying stuffing screw 1.
  • the plug screw 1 is driven by the plug screw drive 5.
  • the pulp is compressed, so that forms a gas-tight Faserstoffpfropfen 10, which serves as a vapor barrier, in particular in the end region of the screw plug.
  • this pulp plug 10 is facilitated by the conical plug screw housing 13, which tapers towards the plug screw end.
  • the vapor barrier is necessary so that steam which is supplied in the disperser 2 or in the feed screw 9 can not escape in the direction of the screw press 7.
  • the feed screw 9 can have special claws or mandrels in the inlet region, which rasp the fibrous plug 10 coming out of the plug screw 1, so that as rapid as possible heating of the resulting fiber flakes is made possible.
  • steam is introduced into the feed screw 9, so that the fibrous material is heated directly in front of the disperser 2.
  • the feed screw 9 is thus also a heating and mixing device.
  • the disperser 2 can be opened by pivoting away the feed screw 9.
  • the dash-dotted representation shows the weggeschwenkte feed screw 9 '.
  • the disperser 2 is connected via a Dispergergetriebe 3 with the motor 4.
  • Fig. 2 shows a side view of the device according to the invention.
  • the plug screw 1 is as in FIG. 1 is arranged after a pre-dewatering device 11 and a screw press 7 and is located directly in front of the feed screw 9 and is directly connected to this.
  • the feed screw 9 is in turn connected directly to the disperser 2 and may also supply means 15, 15 'for steam. Of course, the steam can also be supplied directly in the disperser 2.
  • the plug screw 1 has drainage openings 12, 12 'for dewatering the fibrous material.
  • the dewatering openings 12 are located in the plug screw housing 13.
  • the plug screw 1 a Stopfschneckenhohlwelle 14, wherein in the hollow shaft casing 16 also drainage openings 12 'are provided.
  • the water or the filtrate can be discharged via the stuffing screw hollow shaft 14 from the screw conveyor 1 and discharged via the drainage line 18.
  • the filtrate from the drainage openings 12 of the plug screw housing 13 is collected and removed via the collecting container 19.
  • Fig. 2 the drainage openings 12, 12 'over the entire length of the plug screw housing 13 and the Stopfschneckenhohlwelle 14 are arranged.
  • the drainage openings 12, 12 ' are preferably located in the last third or in the region of the stuffing screw 1, in which the Faserstoffpfropfen 10 forms. This is advantageous because the highest dewatering pressures prevail there.
  • the pulp is pre-dewatering after a pre-drainage in the pre-dewatering device 11 and a Screw press 7 fed to further drainage.
  • the partially dewatered pulp then falls over the shaft 6 into the fabric screw 1, in which a Faserstoffpfropfen 10 is formed with simultaneous further drainage.
  • the resulting in the plug screw 1 filtrate is discharged through the drainage holes 12 in the plug screw housing 13 and via the drainage holes 12 'in the plug screw hollow shaft 14.
  • the drainage in the plug screw 1 can be controlled via the valve 17.
  • After the valve 17 may also be provided a vacuum device for generating negative pressure.
  • the dewatering in the plug screw 1 is supported by the suction effect in the stuffing screw hollow shaft 14 and in the collecting container 19.
  • Fig. 3 shows a side view of another variant of the device according to the invention.
  • the construction is in the Fig. 2 Similarly, however, the pre-dewatering device 11 is connected directly to the plug screw 1.
  • a dewatering screw 7 is no longer provided, since a sufficient dry content of the pulp can be achieved by the combination of the pre-dewatering device 11 with the screw conveyor 1.
  • disc filters 11 ', belt presses, disk presses or drum thickeners come into question as pre-dewatering devices 11.
  • a disc filter 11 'with vacuum-assisted drainage according to the German patent application DE 10 2008 022 206 A1 is particularly suitable as a pre-dewatering device 11, as can be achieved with this disc filter 11 'particularly high dry contents.
  • Fig. 4 a section through the plug screw 1 according to the invention is shown. It can be seen clearly the drainage holes 12 'in the hollow shaft shell 16 of the plug screw hollow shaft 14. On the plug screw hollow shaft 14, the screw 20 for the promotion and Compression of the pulp attached.
  • the fibrous plug 10 is formed in the area between the plug screw hollow shaft 14 and the plug screw housing 13.
  • the drainage holes 12 in the plug screw housing 13 are provided in the present example only on the underside of the plug screw 1, but preferably they are arranged on the entire circumference.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Filtration Of Liquid (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
EP20090015772 2008-12-29 2009-12-21 Procédé et dispositif destinés à drainer et disperser une matière fibreuse Active EP2202052B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT20182008A AT507837B1 (de) 2008-12-29 2008-12-29 Verfahren und vorrichtung zur entwässerung und dispergierung eines faserstoffes

Publications (2)

Publication Number Publication Date
EP2202052A1 true EP2202052A1 (fr) 2010-06-30
EP2202052B1 EP2202052B1 (fr) 2013-09-18

Family

ID=42124502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090015772 Active EP2202052B1 (fr) 2008-12-29 2009-12-21 Procédé et dispositif destinés à drainer et disperser une matière fibreuse

Country Status (3)

Country Link
EP (1) EP2202052B1 (fr)
CN (1) CN101768890B (fr)
AT (1) AT507837B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112959545A (zh) * 2021-02-05 2021-06-15 常熟市中联光电新材料有限责任公司 电线电缆用的塑料粒子脱水装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI125635B (fi) * 2015-02-05 2015-12-31 Valmet Technologies Oy Laite dispergoitavan kiertokuitumassan esilämmittämiseksi

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT4116B (fr) 1899-09-02 1901-05-10 Ernst Sen Fuchs
WO1990012919A1 (fr) * 1989-04-17 1990-11-01 Sunds Defibrator Industries Aktiebolag Dispositif d'egouttage
WO1993023238A1 (fr) 1992-05-15 1993-11-25 Andritz-Patentverwaltungs-Gesellschaft M.B.H. Presse a vis
EP1147805A1 (fr) * 2000-04-13 2001-10-24 Voith Paper Patent GmbH Procédé pour disperser une pulpe de fibres de papier et installation pour l'exécution du procédé
CA2319957A1 (fr) 2000-09-18 2002-03-18 Frank Grund Crepine de presse a vis essoreuse
DE10105281A1 (de) 2001-02-06 2002-08-08 Voith Paper Patent Gmbh Vorrichtung zur Dispergierung eines Papierfaserstoffes
DE102008022206A1 (de) * 2007-05-30 2008-12-04 Andritz Ag Vakuumunterstütztes Entwässerungsverfahren und rotierender Filter zur Durchführung des Entwässerungsverfahrens

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1252175B (de) * 1962-01-19 1967-10-19 Leje & Thurne Aktiebolag, Stockholm Schneckenfilterpresse zum kontinuierlichen Entwässern einer Pulpe aus Holzfasern oder Gemischen aus Abwasserschlamm und Fasern
US3394649A (en) * 1966-06-27 1968-07-30 Somat Corp Liquid extracting device
SE371657B (fr) * 1973-04-05 1974-11-25 Wallen & Co Ab Lennart
SU1123536A3 (ru) * 1981-05-12 1984-11-07 Херманн Бершторфф Машиненбау,Гмбх (Фирма) Устройство дл обработки пульпообразной суспензии твердых веществ
AT411604B (de) * 2002-03-27 2004-03-25 Andritz Ag Maschf Verfahren und vorrichtung zur dispergierung eines papierfaserstoffes

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT4116B (fr) 1899-09-02 1901-05-10 Ernst Sen Fuchs
WO1990012919A1 (fr) * 1989-04-17 1990-11-01 Sunds Defibrator Industries Aktiebolag Dispositif d'egouttage
WO1993023238A1 (fr) 1992-05-15 1993-11-25 Andritz-Patentverwaltungs-Gesellschaft M.B.H. Presse a vis
EP1147805A1 (fr) * 2000-04-13 2001-10-24 Voith Paper Patent GmbH Procédé pour disperser une pulpe de fibres de papier et installation pour l'exécution du procédé
CA2319957A1 (fr) 2000-09-18 2002-03-18 Frank Grund Crepine de presse a vis essoreuse
DE10105281A1 (de) 2001-02-06 2002-08-08 Voith Paper Patent Gmbh Vorrichtung zur Dispergierung eines Papierfaserstoffes
DE102008022206A1 (de) * 2007-05-30 2008-12-04 Andritz Ag Vakuumunterstütztes Entwässerungsverfahren und rotierender Filter zur Durchführung des Entwässerungsverfahrens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112959545A (zh) * 2021-02-05 2021-06-15 常熟市中联光电新材料有限责任公司 电线电缆用的塑料粒子脱水装置

Also Published As

Publication number Publication date
AT507837B1 (de) 2010-10-15
AT507837A1 (de) 2010-08-15
CN101768890B (zh) 2015-11-25
EP2202052B1 (fr) 2013-09-18
CN101768890A (zh) 2010-07-07

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