EP0867561A1 - Procédé et dispositif pour la production d'une pâte chaude, contenant essentiellement des fibres de papier - Google Patents

Procédé et dispositif pour la production d'une pâte chaude, contenant essentiellement des fibres de papier Download PDF

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Publication number
EP0867561A1
EP0867561A1 EP98101981A EP98101981A EP0867561A1 EP 0867561 A1 EP0867561 A1 EP 0867561A1 EP 98101981 A EP98101981 A EP 98101981A EP 98101981 A EP98101981 A EP 98101981A EP 0867561 A1 EP0867561 A1 EP 0867561A1
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EP
European Patent Office
Prior art keywords
rotor
comminution
steam
heating
shredding
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
EP98101981A
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German (de)
English (en)
Other versions
EP0867561B1 (fr
Inventor
Almut Kriebel
Erich Peters
Volker Niggl
Josef Schneid
Hans Schnell
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 Sulzer Papiertechnik Patent GmbH
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Publication date
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Publication of EP0867561A1 publication Critical patent/EP0867561A1/fr
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Classifications

    • 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
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water

Definitions

  • the invention relates to a method for heating paper pulp according to the Preamble of claim 1.
  • Procedure of the above Kind are needed e.g. in preparation for one Dispersion process of pulp obtained from waste paper. It is known, that pulp by dispersing or a comparable mechanical / thermal treatment significantly improved in its properties can be. In many cases, a fibrous material is used that one Has a dry content between 15 and 35% and brought to a temperature that is far above the ambient temperature. It makes sense that Perform heating when the pulp is already being dispersed has the required consistency. In this thickening process, a significant portion of the previously pressed water still present in the fiber, whereby firstly its Viscosity increases significantly and secondly less water has to be heated. Thickening is often carried out in a screw press.
  • the fiber suspension is between one Screw conveyor and a perforated shell surrounding it, so that the Water leaks through the jacket.
  • the goal is to carry out the aforementioned method steps with a compact unit can be achieved even better if the highly consistent paper pulp is entered directly into the set of a disperser.
  • the fabric is then covered by the Seen the direction of the river, detected the first stage of the disperger, crushed and swirled, creating the fiber crumbs.
  • By feeding steam into the the first crushing stage downstream of the zone the material is then on the necessary temperature heated, due to the good grinding effect a relatively short heating-up time is sufficient.
  • the actual dispersion i.e. Change of Material properties take place in the dispersion zone, which follows downstream.
  • FIG. 1 shows, with simplified technical features, the manner in which the method according to the invention can basically run.
  • the highly consistent paper pulp in the form of a plug 1 is driven out of a thickening press 2 and driven into the processing space 6.
  • This plug has, for example, a consistency between 15 and 20% and thus a certain strength.
  • this material may already have a temperature which is above the ambient level, for example between 30 and 40 ° C.
  • the plug 1 is shown in a circular cylindrical manner in all the figures, but it can also have a different cross-sectional shape, for. B. exit ring-shaped from the thickening press 2.
  • the comminution step is carried out in that a rotor 3, against which the plug 1 is pressed, removes the fiber crumbs at the contact point.
  • the movement of the rotor and the heating steam ST added via the steam line 5 result in a strong swirling and mixing with the steam.
  • the crumb is therefore heated up very quickly and can then leave the processing space 6 for further processing, for example dispersion.
  • the shredding, swirling and heating of the paper pulp take place in a coherent work step.
  • the dwell time of the fibrous material in the processing space 6 must be defined as clearly as possible, in other words: the transport process must be controlled.
  • the mean residence time can be determined from the throughput and volume of the processing space 6.
  • the mean residence time can be determined from the throughput and volume of the processing space 6.
  • Fig. 2 is also indicated that the supply of the heating steam ST can take place in the immediate vicinity of the comminution zone, whereby the steam penetrates faster into the material. This also speeds up heating. If the steam jet is bundled accordingly, it may be able to help peel off the substance until it condenses.
  • the processing room is not shown here.
  • the downstream disperser 7 with the feed screw 8 can be seen schematically.
  • the paper pulp can advantageously be supplied at an angle ⁇ of approximately 45 ° to the vertical, as shown in FIG. 2. This results in an optimal trajectory of the material crumbs in the upper area of the processing space 6.
  • the rotors 3 crushing elements 4 on their circumference have, such can also be attached to the end face of a varied rotor, such as Fig. 4 shows. Then on the shaft of the rotor 12 e.g. Paddle 10 for swirling attach the crumb.
  • Fig. 5 such a crushing tool is shown, which on the end face Crushing elements 4 and paddles 10 is provided on the shaft.
  • the peeled off Fibrous material is captured by the paddles 10 attached to the same rotor 12, in Swirled circumferentially and hurled into the area above the rotor 12.
  • the heating steam enters from below through a number of steam lines 5 ' the processing room 6. Since the paddle 10 here is essentially one Generate circumferential movement, the axial speed can be controlled separately, e.g. a separate screw conveyor above the effective range of the rotor 12 11 is attached, which firstly ensures the axial feed and secondly the sticking of fiber in the upper part of the processing space 6 prevented.
  • This principle whirling up the crumb material through the rotor 12 and 12 located below 6 shows the axial conveying through the above-mentioned screw conveyor 11 in a somewhat different view.
  • the advantage of such an arrangement is - as already mentioned - that Possibility of using a, here the rotor below, the fine crumb stuff whirl that he can very easily come into contact with the heating steam to thereby - if possible several times - in the upper part of the processing area arrive in which the separate and thus differently controllable screw conveyor 11th rotates.
  • This can advantageously be a belt screw, the conveyor belt of the housing keeps free from baked-on fabric.
  • the rotor 12 can also be a paddle Containing screw conveyor, which is in engagement with the screw conveyor 11. To the Control devices 20 can control the trajectory of the material crumbs here indicated, be present.
  • FIG. 8 shows a particularly favorable embodiment of the method according to the invention using a device that can be used for this purpose.
  • the highly consistent paper pulp as a plug 1 coming from the thickening press 2 pressed directly into the area of a disperger set.
  • the one shown here Version is a disperger set with radial material flow, with a stator 15 and a rotor 16.
  • an axial disperger or Kneaders are used.
  • the disperger 14 shown here is loaded radially on the inside, for which purpose a first comminution element 17 is attached in the center of the rotor 16, which e.g. wing-shaped or cross-shaped shredding bars can carry.
  • This here opposed plug 1 is, as already explained in earlier versions, peeled off or grated and thereby broken up into small crumbs.
  • Primary stator teeth 22 slow down the fabric and thereby extend its dwell time in the radially outside adjoining steam chamber 18.
  • This steam chamber 18 is essentially ring-shaped and does not contain any mechanical dispersion teeth. As is known Dispersion causes teeth to move at relatively high speeds are moved close to each other and the fiber material in between subject to strong shear forces.
  • This function has a device for Implementation of the method according to the invention is only the radially further outside Steam room 18 adjoining dispersion zone 19. Inside the steam room So the material is not mechanically dispersed. If necessary, however, internals can be present that slow down the movement of the fabric or swirl it.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Disintegrating Or Milling (AREA)
EP98101981A 1997-03-26 1998-02-05 Procédé et dispositif pour la production d'une pâte chaude, contenant essentiellement des fibres de papier Expired - Lifetime EP0867561B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19712651A DE19712651A1 (de) 1997-03-26 1997-03-26 Verfahren und Vorrichtung zur Herstellung eines heißen, überwiegend Papierfasern enthaltenden Krümelstoffes
DE19712651 1997-03-26

Publications (2)

Publication Number Publication Date
EP0867561A1 true EP0867561A1 (fr) 1998-09-30
EP0867561B1 EP0867561B1 (fr) 2002-07-31

Family

ID=7824651

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98101981A Expired - Lifetime EP0867561B1 (fr) 1997-03-26 1998-02-05 Procédé et dispositif pour la production d'une pâte chaude, contenant essentiellement des fibres de papier

Country Status (5)

Country Link
US (1) US6073865A (fr)
EP (1) EP0867561B1 (fr)
AT (1) ATE221593T1 (fr)
DE (2) DE19712651A1 (fr)
NO (1) NO314636B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015090685A1 (fr) * 2013-12-19 2015-06-25 Voith Patent Gmbh Système de dispersion-chauffage

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19712653C2 (de) 1997-03-26 2002-10-24 Voith Paper Fiber Systems Gmbh Verfahren und Vorrichtung zur Dispergierung eines Altpapierfaserstoffes
DE10102449C1 (de) 2001-01-19 2002-03-21 Voith Paper Patent Gmbh Vorrichtung zur Heiß-Dispergierung eines Papierfaserstoffes
US6673211B2 (en) * 2001-07-11 2004-01-06 Voith Paper Patent Gmbh Apparatus for loading fibers in a fiber suspension with calcium carbonate
AU2003253919A1 (en) * 2002-07-19 2004-02-09 Andritz Inc. High defiberization chip pretreatment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB548271A (en) * 1941-03-31 1942-10-02 Cellulose Dev Corp Ltd An improved method and apparatus for expressing liquid from pulp
FR2224591A1 (fr) * 1973-04-05 1974-10-31 Wallen & Co Ab Lennart
DE2660362B1 (de) * 1975-06-30 1980-06-12 Karlstad Mekaniska Ab Verfahren und Vorrichtung zur kontinuierlichen Behandlung von Faserstoffbrei mit einem gasfoermigen Medium

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1795603A (en) * 1928-03-08 1931-03-10 Bauer Bros Co Method of producing pulp
GB1052514A (fr) * 1963-03-11 1900-01-01
DE1761864A1 (de) * 1968-07-16 1971-09-02 Voith Gmbh J M Verfahren und Vorrichtung zum Rueckgewinnen von Fasermaterial aus gemischtem Altpapier
DE1806612C3 (de) * 1968-11-02 1974-02-14 Hombak Maschinenfabrik Kg, 6550 Bad Kreuznach Zerkleinerungsvorrichtung zur Herstellung von schüttfähigen Fasern
US3585924A (en) * 1969-03-10 1971-06-22 William J Nolan Apparatus for the removal of liquids from fibrous materials
US3661328A (en) * 1970-03-30 1972-05-09 Bauer Bros Co Pulp refining system and process
US3671019A (en) * 1970-12-10 1972-06-20 Rietz Mfg Co Apparatus for material fluffing
SE359332B (fr) * 1971-12-20 1973-08-27 Reinhall Rolf
US3765611A (en) * 1972-08-07 1973-10-16 Bauer Bros Co Refining process
US3847363A (en) * 1972-10-20 1974-11-12 Reinhall Rolf Device in grinding apparatus for vegetable or fibrous material
SE372299B (fr) * 1973-04-27 1974-12-16 Reinhall Rolf
SE419659B (sv) * 1976-03-19 1981-08-17 Rolf Bertil Reinhall Sett och anordning for framstellning av fibermassa av fiberformigt lignocellulosahaltigt material
SE413601B (sv) * 1976-06-30 1980-06-09 American Defibrator Sett vid framstellning av fibermassa i en under angtryck staende malapparat samt anordning for genomforande av settet
SE413784B (sv) * 1976-08-06 1980-06-23 Isel Sa Sett och anordning for att utnyttja i defibreringszonen utvecklat verme for att minimera angforbrukningen vid framstellning av massa for fiberskivor
US4123489A (en) * 1977-05-17 1978-10-31 Flett Development Company Method for converting waste paper products into useful forms
US5035362A (en) * 1984-01-26 1991-07-30 Marian Mazurkiewicz Disintegration of wood
NO180241C (no) * 1994-12-14 1997-03-12 Kvaerner Hymac As Innretning for behandling av partikkelmasse
DE19523704C2 (de) * 1995-06-29 2000-08-10 Voith Sulzer Stoffaufbereitung Vorrichtung zur mechanischen Behandlung von hochkonsistentem Faserstoff

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB548271A (en) * 1941-03-31 1942-10-02 Cellulose Dev Corp Ltd An improved method and apparatus for expressing liquid from pulp
FR2224591A1 (fr) * 1973-04-05 1974-10-31 Wallen & Co Ab Lennart
DE2660362B1 (de) * 1975-06-30 1980-06-12 Karlstad Mekaniska Ab Verfahren und Vorrichtung zur kontinuierlichen Behandlung von Faserstoffbrei mit einem gasfoermigen Medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015090685A1 (fr) * 2013-12-19 2015-06-25 Voith Patent Gmbh Système de dispersion-chauffage

Also Published As

Publication number Publication date
NO981017L (no) 1998-09-28
US6073865A (en) 2000-06-13
EP0867561B1 (fr) 2002-07-31
DE59804957D1 (de) 2002-09-05
NO981017D0 (no) 1998-03-09
NO314636B1 (no) 2003-04-22
ATE221593T1 (de) 2002-08-15
DE19712651A1 (de) 1998-10-01

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