EP1798330A1 - Procédé pour disperser une pulpe de fibres de papier - Google Patents

Procédé pour disperser une pulpe de fibres de papier Download PDF

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Publication number
EP1798330A1
EP1798330A1 EP06023174A EP06023174A EP1798330A1 EP 1798330 A1 EP1798330 A1 EP 1798330A1 EP 06023174 A EP06023174 A EP 06023174A EP 06023174 A EP06023174 A EP 06023174A EP 1798330 A1 EP1798330 A1 EP 1798330A1
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EP
European Patent Office
Prior art keywords
fractionation
dispersion
carried out
fine fraction
fraction
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Withdrawn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
EP06023174A
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German (de)
English (en)
Inventor
Michael Kramer
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 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
Publication of EP1798330A1 publication Critical patent/EP1798330A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/32—Defibrating by other means of waste paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D99/00—Subject matter not provided for in other groups of this subclass
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • 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
    • 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
    • D21D1/20—Methods of refining
    • D21D1/34—Other mills or refiners
    • D21D1/38—Other mills or refiners with horizontal shaft

Definitions

  • the invention relates to a process for the dispersion of paper pulp according to the preamble of claim 1.
  • Method of o.g. Type will be e.g. used to improve the quality of pulp recovered from waste paper. It is known that paper pulp can be homogenized by dispersing and thereby significantly improved. Residual (resistant) fiber specks can be dissolved. Hard contaminants adhering to the fibers, in particular printing ink particles, are separated off. Soft contaminant particles are crushed to such an extent that they are no longer visible in the finished paper. In addition, they can be fixed to the fiber, which improves the papermaking.
  • the optimum effect of the process for the respective purpose can be set by selecting the parameters, in particular consistency, temperature and specific work.
  • a high-consistency paper pulp has been prepared which usually has a dry content of between 15 and 35%. In many cases it is dispersed at a temperature far above the ambient temperature. Dispersers used for such processes have a high energy density. The energy for the specific work transferred to the paper pulp at 30 to 200 kWh / t represents a significant cost factor for the process.
  • a suitable machine for thickening is the screw press.
  • the pulp suspension is squeezed between a screw conveyor and a perforated shell surrounding it, the water exiting through the holes of the jacket.
  • the resulting high-consistency paper pulp is expressed axially out of the machine.
  • a sieve press which is known to have one or two circumferential Endlossiebe through which a filtrate passes.
  • fractionation takes place before dispersion.
  • fractionation into short fibers and long fibers divides.
  • the long fiber fraction is thickened and dispersed, for example, in a disk disperger.
  • the process should lead to a homogeneous and clean pulp.
  • the particular advantage of the invention results from the fact that the dispersion of the coarse fraction is carried out using a compression refiner, which operates by a method which, for example, in the DE-A-102 36 962 is described, which is already known per se. It has hitherto been used for grinding, ie changing the fibers, and / or for comminuting printing ink particles. This process gives a very good dispersion without fiber damage. Stickies are comminuted so that they float more easily or wash out. This processing can be performed in comparison to the disk disperger or kneader with significantly lower consistency, for example 6 to 12%, which saves equipment and energy. The specific work for this purpose is then for example at about 20 to 60 kWh / t.
  • the fractionation can be carried out so that as far as possible all fibers get into the coarse fraction.
  • the fine fraction then contains few fibers (even a few short fibers), but a large part of the organic and inorganic fines.
  • the proportion of fibers is usually determined as the residue of the sieve R 100 according to Bauer McNett (laboratory method according to TAPPI Standard T 233). Fines fall into the same analysis as the run of the 100-mesh screen.
  • Advantageous is a fractionation with a washing device or a suitably designed and operated pressure sorter.
  • Fig. 1 shows an embodiment with the most important equipment that can be used in carrying out the method according to the invention.
  • the paper pulp suspension S1 produced for example, in a pulper, not shown here, is passed through thick matter cleaner 7 and pressure sorter 13, whereby coarse contaminants of the waste paper are removed.
  • the mentioned separation devices are to be understood as examples. There are various ways known to clean a soiled paper fiber suspension so far that it can be processed in the following apparatus described here.
  • the cleaned pulp suspension S2 next enters a fractionator 2 to form a coarse fraction G and fine fraction F.
  • ⁇ By type of inevitablyiervoriques 2 and the operating conditions in the fractionation can be the division of the pulp in coarse and fine fraction set.
  • the fibers contained in the paper fiber suspension S2 should be divided into short fibers and long fibers, which then is the classic fiber fractionation.
  • as many fibers as possible, be they short or long should enter the coarse fraction G and the fine fraction F essentially contain organic and inorganic fines, which are in particular fiber fines, fillers and the contaminants to be sorted out.
  • Such a special fractionation is achieved particularly effectively in a method embodiment according to FIG. 1 with the aid of a washing device.
  • the filtrate of the washing device is then the fine fraction F.
  • Such fiber washing devices are known.
  • the fractionation 2 'of the paper pulp suspension S2 can also be operated with the aid of a pressure sorter, which is shown in the system diagram of FIG. 2.
  • the special effect as a fractionator is favored by relatively low consistency and in that for the sieve openings relatively small values, for example, about 0.3 to 1 mm hole or 0.1 to 0.15 mm slot, are selected.
  • a sieve which has no protrusions or grooves in addition to the sieve openings is generally more favorable.
  • the overflow rate would be relatively high, eg approx. 50%, whereby such values refer to the respective solids content of the suspension.
  • fibers can also be fractionated in hydrocyclones, with a consistency between 0.3% and 0.7% being particularly favorable.
  • the coarse fraction G can be supplied in the case shown in FIG. 1 without prior thickening of a dispersion 1.
  • a rotating drum 3 which has a toothing here inside, which forms a grinding surface 5.
  • On this roll one or more grinding drums 6, which are preferably mounted with fixed axes of rotation. Their outer grinding surfaces 4 cooperate with the internal grinding surfaces 5 of the drum 3. It is also possible to use a drum 3 with untoothed grinding surface.
  • the suspension S3 to be dispersed is applied to the grinding surface 5 on which it rests as a result of the centrifugal forces.
  • Various devices for Kompressionsmahlung are for example from the applications DE 103 37 921 . DE 103 37 922 . DE 103 56 377 and DE 103 58 217 known.
  • a coarse fraction G of increased consistency is formed from the coarse fraction G.
  • the squeezed water W1 can be used with advantage again to dissolve. Depending on the requirements of the dispersion, this can take place at elevated temperatures.
  • the mid-range temperatures e.g. at 40 ° C, ie in an area that does not require additional heating.
  • the higher-consistency paper pulp S3 is heated, by way of example a heating screw 12 being shown here is. Subsequently, the dispersion 1 of the heated paper pulp S3 'is carried out by compression grinding.
  • the specific work that is transferred to the pulp during dispersion 1 is usually set to a value between 20 and 100 kWh / t, preferably about 20 kWh / t.
  • the dispersed pulp S4 can be cleaned with particular advantage after a corresponding dilution 14 with water W in a flotation device 15 (see Fig. 1) after addition of air L or a wash (not shown) of finely detached impurities. Depending on requirements, this separation step can be carried out before or after mixing with the fine fraction F of the fractionation 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
EP06023174A 2005-12-17 2006-11-08 Procédé pour disperser une pulpe de fibres de papier Withdrawn EP1798330A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005060478 2005-12-17

Publications (1)

Publication Number Publication Date
EP1798330A1 true EP1798330A1 (fr) 2007-06-20

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ID=37806173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06023174A Withdrawn EP1798330A1 (fr) 2005-12-17 2006-11-08 Procédé pour disperser une pulpe de fibres de papier

Country Status (2)

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EP (1) EP1798330A1 (fr)
KR (1) KR20070064544A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020094322A1 (fr) * 2018-11-08 2020-05-14 Voith Patent Gmbh Rotor pour un élément de chauffage
CN114381965A (zh) * 2022-02-15 2022-04-22 浙江恒川新材料有限公司 一种吸管原纸生产用打浆设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0653510A2 (fr) * 1993-11-11 1995-05-17 J.M. Voith GmbH Procédé pour le traitement de vieux papiers imprimés
US5417806A (en) * 1991-10-19 1995-05-23 Sulzer-Escher Wyss Gmbh Method of removing fine contaminants from used paper fibre material
DE10132743A1 (de) * 2001-07-05 2003-01-16 Voith Paper Patent Gmbh Verfahren zur Aufteilung eines aus mehreren Papiersorten bestehenden Rohstoffes in mindestens zwei Papierfraktionen
DE10256519A1 (de) * 2002-12-04 2004-06-24 Voith Paper Patent Gmbh Verfahren zur Dispergierung eines aus bedrucktem Papier gewonnenen Papierfaserstoffes
DE10337921A1 (de) * 2003-08-18 2005-03-17 Voith Paper Patent Gmbh Verfahren zur Mahlung von wässrig suspendierten Papier- oder Zellstofffasern
DE10356377A1 (de) * 2003-12-03 2005-07-07 Voith Paper Patent Gmbh Verfahren zur Mahlung von wässrig suspendierten Papier- oder Zellstofffasern
EP1728918A2 (fr) * 2005-05-12 2006-12-06 Voith Patent GmbH Procédé pour séparer des impuretés d'une suspension aqueuse de fibres

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5417806A (en) * 1991-10-19 1995-05-23 Sulzer-Escher Wyss Gmbh Method of removing fine contaminants from used paper fibre material
EP0653510A2 (fr) * 1993-11-11 1995-05-17 J.M. Voith GmbH Procédé pour le traitement de vieux papiers imprimés
DE10132743A1 (de) * 2001-07-05 2003-01-16 Voith Paper Patent Gmbh Verfahren zur Aufteilung eines aus mehreren Papiersorten bestehenden Rohstoffes in mindestens zwei Papierfraktionen
DE10256519A1 (de) * 2002-12-04 2004-06-24 Voith Paper Patent Gmbh Verfahren zur Dispergierung eines aus bedrucktem Papier gewonnenen Papierfaserstoffes
DE10337921A1 (de) * 2003-08-18 2005-03-17 Voith Paper Patent Gmbh Verfahren zur Mahlung von wässrig suspendierten Papier- oder Zellstofffasern
DE10356377A1 (de) * 2003-12-03 2005-07-07 Voith Paper Patent Gmbh Verfahren zur Mahlung von wässrig suspendierten Papier- oder Zellstofffasern
EP1728918A2 (fr) * 2005-05-12 2006-12-06 Voith Patent GmbH Procédé pour séparer des impuretés d'une suspension aqueuse de fibres

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020094322A1 (fr) * 2018-11-08 2020-05-14 Voith Patent Gmbh Rotor pour un élément de chauffage
CN112969828A (zh) * 2018-11-08 2021-06-15 福伊特专利有限公司 用于加热机组的转子
CN114381965A (zh) * 2022-02-15 2022-04-22 浙江恒川新材料有限公司 一种吸管原纸生产用打浆设备
CN114381965B (zh) * 2022-02-15 2023-12-19 浙江恒川新材料有限公司 一种吸管原纸生产用打浆设备

Also Published As

Publication number Publication date
KR20070064544A (ko) 2007-06-21

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