WO2015090685A1 - Système de dispersion-chauffage - Google Patents

Système de dispersion-chauffage Download PDF

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Publication number
WO2015090685A1
WO2015090685A1 PCT/EP2014/072709 EP2014072709W WO2015090685A1 WO 2015090685 A1 WO2015090685 A1 WO 2015090685A1 EP 2014072709 W EP2014072709 W EP 2014072709W WO 2015090685 A1 WO2015090685 A1 WO 2015090685A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulp
loosening
cylinder
paper pulp
screen cylinder
Prior art date
Application number
PCT/EP2014/072709
Other languages
German (de)
English (en)
Inventor
Wolfgang Mannes
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 WO2015090685A1 publication Critical patent/WO2015090685A1/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
    • 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 heating a paper pulp to be dispersed, which is added after dehydration in a relaxed state and mixed with a fluid heating medium.
  • the invention also relates to a device for loosening a paper pulp to be dispersed with a rotor which rotates in a chamber with a pulp feed and a pulp removal, for carrying out the method.
  • paper pulp can be homogenized by dispersing and thereby significantly improved.
  • a pulp is used which has a dry content of between 15 and 35% and has been brought to a temperature which is far above the ambient temperature.
  • the most important thickening machines are screw presses and screen presses.
  • the pulp suspension is introduced between a sieve and a roller or between two sieves and pressed so that the water emerges. This creates a moist fibrous web.
  • this web has a basis weight of between 500 and 2000 g / m 2 , although deviating values may also be useful.
  • the wet web is removed from the area of the screen or screens and must then be in flat pieces be torn. Although these can be easily brought to the desired temperature, but it is a relatively long heating time needed. For example, warm-up times of several minutes must be accepted, especially if a temperature above 90 C is desired. Thereafter, the hot crumb is supplied to the disperser. This requires a fairly complex system.
  • the object has been achieved in that at least the major part of the paper pulp is sheared only once for loosening. This is usually sufficient for the loosening and connected only with a relatively low energy requirement.
  • the heating medium may be advantageous to mix the heating medium before and / or during and / or after the loosening.
  • the rotor is formed by a screen cylinder open only for fiber feed with slot-shaped screen openings in the cylinder jacket.
  • the slot width is over 5 mm, preferably over 10 mm.
  • the cylinder axis of the screen cylinder should coincide with the axis of rotation of the rotor.
  • the slots acting as screen openings should extend parallel to the cylinder axis of the screen cylinder. This, in turn, makes it possible for the jacket of the screen cylinder to be formed by bars extending parallel to the cylinder axis.
  • This rotor design is not only simple but also very robust and efficient.
  • a preferably upper end of the screen cylinder should be open for fiber feed and the pulp discharge be located radially outside the cylinder jacket of the screen cylinder.
  • one or more clearing blades are attached to the rotor radially outside the screen cylinder and at least one and at most ten fixed scrapers protrude into the open end of the screen cylinder.
  • Figure 1 a plant scheme with oxidizing bleach
  • FIG. 2 shows a plant scheme with reducing and oxidizing bleaching
  • FIG. 3 shows a device for dissolving the paper pulp 1.
  • the paper pulp 1 passes through a drainage 2 in the form of a screw press. From there comes the high-consistency paper pulp 1 in a loosening 5 arranged immediately below, in which the paper pulp 1 is subjected to essentially only a shear.
  • bleaching chemicals 6 and / or a heating medium 3 in the form of water vapor can be added to the paper pulp 1.
  • the highly consistent, heated and bleached paper pulp 1 enters the disperser 16.
  • dispersion is effected by relatively fast moving teeth relatively close to each other and subjecting the fiber therebetween to strong shearing forces.
  • an axial disperger or kneader can also be used for this purpose.
  • Figure 2 shows a combination of reducing and oxidizing bleaching.
  • the paper pulp 1 before the loosening 5 only a heating medium 3 and a reducing bleaching chemical 6 is supplied.
  • the material is pre-shredded to the extent that it can be conveyed in screw systems. Accordingly, the paper pulp 1 is present the entry into the Disperger 16 by a screw conveyor 17 and guided by this in the Dispergers 16.
  • the paper pulp 1 can then be further heated by the further addition of a fluid heating medium 3, such as water vapor.
  • a fluid heating medium 3 such as water vapor.
  • an oxidizing bleaching chemical can then be added to the paper pulp 1.
  • Figure 3 shows a simple and efficient arrangement.
  • the rotor 4 is in a chamber 7, which has a pulp feed 8 and a pulp discharge 9.
  • the rotor 4 is formed by an upwardly open screen cylinder, over whose upper end the fibrous feed 8 is located.
  • the jacket of the screen cylinder is formed substantially by parallel to the cylinder axis 1 1 extending and spaced-apart rods 13 which are fixed on a disc 18 of the rotor 4, which forms the lower end of the screen cylinder.
  • Slot-shaped screen openings 10 are thus formed between the bars 13, through which the fibers are thrown radially outward to the pulp discharge 9.
  • the clear width between the rods 13, i. the slot width is greater than 10 mm here.
  • the cylinder axis 1 1 of the screen cylinder coincides with the axis of rotation 12 of the rotor 4.
  • a stationary scraper 15 protrudes into the open end of the screen cylinder.
  • the scraper 15 connected to the chamber 7 clears fibrous accumulations in front of the rods 13.
  • a clearing blade 14 is attached to the rotor 4 radially outside the screen cylinder.

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  • Paper (AREA)

Abstract

L'invention concerne un procédé pour chauffer une matière fibreuse de papier à disperser qui est mise en état de désagrégation par déshydratation et est mélangée à un milieu chauffant fluide. A cet effet, les besoins énergétiques doivent pouvoir être réduits du fait qu'au moins la majeure partie de la matière fibreuse de papier n'est cisaillée qu'une fois en vue de la désagrégation.
PCT/EP2014/072709 2013-12-19 2014-10-23 Système de dispersion-chauffage WO2015090685A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013226597.2 2013-12-19
DE102013226597.2A DE102013226597A1 (de) 2013-12-19 2013-12-19 Disperger-Aufheizung

Publications (1)

Publication Number Publication Date
WO2015090685A1 true WO2015090685A1 (fr) 2015-06-25

Family

ID=51786965

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/072709 WO2015090685A1 (fr) 2013-12-19 2014-10-23 Système de dispersion-chauffage

Country Status (2)

Country Link
DE (1) DE102013226597A1 (fr)
WO (1) WO2015090685A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0867561A1 (fr) * 1997-03-26 1998-09-30 Voith Sulzer Papiertechnik Patent GmbH Procédé et dispositif pour la production d'une pâte chaude, contenant essentiellement des fibres de papier
DE20101992U1 (de) * 2001-02-06 2001-04-05 Voith Paper Patent Gmbh Vorrichtung zur Dispergierung eines Papierfaserstoffes
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
DE10102449C1 (de) * 2001-01-19 2002-03-21 Voith Paper Patent Gmbh Vorrichtung zur Heiß-Dispergierung eines Papierfaserstoffes
DE102008009134A1 (de) * 2008-02-14 2009-08-20 Voith Patent Gmbh Verfahren zur Entfernung von Störstoffen aus einer wässrigen Faserstoffsuspension

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19704183A1 (de) * 1997-02-05 1998-08-06 Voith Sulzer Stoffaufbereitung Verfahren und Vorrichtung zur reduzierenden Bleiche von hochkonsistentem Papierfaserstoff
DE19712653C2 (de) * 1997-03-26 2002-10-24 Voith Paper Fiber Systems Gmbh Verfahren und Vorrichtung zur Dispergierung eines Altpapierfaserstoffes
EP2324154A2 (fr) * 2008-08-11 2011-05-25 Voith Patent GmbH Dispositif de fractionnement d'une suspension fibreuse

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0867561A1 (fr) * 1997-03-26 1998-09-30 Voith Sulzer Papiertechnik Patent GmbH Procédé et dispositif pour la production d'une pâte chaude, contenant essentiellement des fibres de papier
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
DE10102449C1 (de) * 2001-01-19 2002-03-21 Voith Paper Patent Gmbh Vorrichtung zur Heiß-Dispergierung eines Papierfaserstoffes
DE20101992U1 (de) * 2001-02-06 2001-04-05 Voith Paper Patent Gmbh Vorrichtung zur Dispergierung eines Papierfaserstoffes
DE102008009134A1 (de) * 2008-02-14 2009-08-20 Voith Patent Gmbh Verfahren zur Entfernung von Störstoffen aus einer wässrigen Faserstoffsuspension

Also Published As

Publication number Publication date
DE102013226597A1 (de) 2015-06-25

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