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EP0990733B1 - Procédé pour tuer des germes dans un matériau contenant des fibres pour papeterie et dispositif pour l' application du procédé - Google Patents

Procédé pour tuer des germes dans un matériau contenant des fibres pour papeterie et dispositif pour l' application du procédé Download PDF

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Publication number
EP0990733B1
EP0990733B1 EP99115241A EP99115241A EP0990733B1 EP 0990733 B1 EP0990733 B1 EP 0990733B1 EP 99115241 A EP99115241 A EP 99115241A EP 99115241 A EP99115241 A EP 99115241A EP 0990733 B1 EP0990733 B1 EP 0990733B1
Authority
EP
European Patent Office
Prior art keywords
content
heating
vapour
compression
high temperature
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.)
Expired - Lifetime
Application number
EP99115241A
Other languages
German (de)
English (en)
Other versions
EP0990733A1 (fr
Inventor
Jürgen Dockal-Baur
Harald Selder
Herbert Holik
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 Paper 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 Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0990733A1 publication Critical patent/EP0990733A1/fr
Application granted granted Critical
Publication of EP0990733B1 publication Critical patent/EP0990733B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21BFIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00Fibrous raw materials or their mechanical treatment
    • D21B1/02Pretreatment of the raw materials by chemical or physical means
    • D21B1/021Pretreatment of the raw materials by chemical or physical means by chemical means

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • Bleaching processes also often work at temperatures above 85 ° C, which means that Effectiveness of the added bleaching chemicals improved and accelerated. Often the bleaching chemicals are also mixed in by a disperser and can then work in a stack volume. Such a method is e.g. out known from DE 36 10 940 A1.
  • the highly effective also vent the air that is between and within the fibers completely removed.
  • Treatment at high temperatures in the absence of air and with complete water / steam wetting results in a significant improvement germ killing.
  • the water vapor present in the high temperature treatment can wet the air-free material and therefore the germs particularly well, which for the Germ killing is beneficial.
  • Venting can be done in several steps, e.g. first by compressing of the material and simultaneous or subsequent removal of the compressed air. Their transport through the material plug must then be as short as possible because the plug has hardly any voids. It can also be useful in a second step with the remaining voids of the compressed material an air-free steam. The material is used for even greater freedom from air loosened again and rinsed with steam.
  • both the temperature and the effective time influence the success of the Killing germs.
  • the process is particularly effective at one temperature well above 100 ° C, e.g. at a temperature of 130 ° C an effective time of a few seconds is enough.
  • the application of the invention is only with little additional effort connected, namely when a hot and / or bleaching treatment anyway to be carried out. Then, with a corresponding change in the procedure using the features of the invention perfected the germ killing become.
  • FIG. 1 shows the functional procedure, without giving details devices or control loops.
  • the Vent so far that in the vented material M 1 there is a residual air content of at most 1% is included. The air content is based on the total volume of the Materials M related.
  • the vented material goes into high-temperature treatment 1, in which it is at a temperature of at least 80 ° C, preferably above 100 ° C, is heated.
  • a heating medium H is indicated.
  • the vented and heated Material M1 is conveyed into the disperger 2 after a certain exposure time it is dispersed with the help of mechanical energy P.
  • Chemicals can Improve disinfection significantly.
  • Suitable chemicals CH are e.g. Peroxide, which is advantageously dosed higher than it already is for bleaching the fiber material would be required.
  • the dispersion can also be carried out together with the degassing process (Rinsing cycle) are made (Fig. 3).
  • Fig. 4 shows a further process variant with the special feature that the material M is first drained by compressing 4 and immediately afterwards the ventilation with the help of steam D.
  • the Venting and high temperature treatment essentially in one step respectively.
  • the material M can advantageously be expanded during the venting leave and loosen it up so that new contact surfaces for the hot steam arise. Trapped air is thereby exposed and can be flushed out.
  • Fig. 5 shows a schematic diagram of a special ventilation device, the is suitable to vent the material M as far as it is necessary to carry out the Procedure is required.
  • the device is based on the principle Screw press built, in which a conical screw conveyor 8 in one conical strainer basket 7 is drivably mounted. The conicity reduces the Press chamber 5 in the conveying direction of the screw conveyor 8.
  • Another one, not shown here One possibility would be a screw conveyor shaft that becomes thicker in the direction of conveyance the effect that the strainer basket 7 and the screw conveyor 8 have a cylindrical shape could (cheaper). Mixed forms of these two principles are also conceivable.
  • the Material M is introduced through the inlet 9 into the housing and then from the Screw conveyor 8 detected and pressed.
  • the material M is so far compresses that the gas-filled residual volumes become very small. Because of the strainer 7 not all air has to flow backwards against the conveying direction, but can also exit radially from the pressed material into the gas space 6. That has the advantage short distances.
  • the vented material M is then discharged through the outlet 10.
  • Fig. 6 shows the combination of a compression device 13 with itself immediately following device for high temperature treatment.
  • up to one is also in the compression device 13 vented to a certain degree.
  • the pressed, partially vented material M is directly in a here shown as heating screw 14 high temperature treatment device promoted.
  • In the connector 15 between the compression device 13 and the heating screw 14 is a plug of when the system is operating compressed material M.
  • the plug seals, which is particularly important if the heating screw 14 is operated under positive pressure.
  • This too Venting device includes a gas outlet 12. That from the connector incident material M expands, is loosened by racket 17 and then swirled by the screw conveyor 18 and transported on. Basically, there are other machine parts to loosen the material
  • the steam D fed into the heating screw 14 drives the material M out of the Residual air, which then flows out through the gas outlet 12.
  • a Valve the pressure in the heating screw controlled or regulated.
  • FIG. 7 shows the combination of a ventilation device 19 with one another immediately following heating screw 14 for high temperature treatment. It is the venting device 19 is arranged vertically, so that the pressed, vented Material M 1 can fall directly into the heating screw 14. In the connector 15 between the ventilation device 19 and the heating screw 14 is at Operation of the plant a plug of compressed material M. This seals against any excess pressure in the heating screw 14. Because the heating screw 14 is operated with direct feed of steam D, part of the steam can be used as Purge gas act and through a gas outlet 12 on the housing of the heating screw 14th escape.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (21)

  1. Procédé destiné à la destruction de germes dans de la matière (M) contenant des fibres de papier, notamment des vieux papiers, dans lequel la matière (M) est soumise dans un mélange aqueux à un traitement (1) à haute température d'au moins 80 °C,
       caractérisé en ce que,
       avant ou lors du traitement (1) à haute température, la matière (M) est désaérée jusqu'à une teneur résiduelle en air inférieure à 1 % en volume.
  2. Procédé selon la revendication 1,
       caractérisé en ce que
       la désaération est effectuée jusqu'à une teneur résiduelle en air qui est inférieure à 0,1 % en volume.
  3. Procédé selon la revendication 1 ou 2,
       caractérisé en ce que,
       par compression (3, 4) sans modification de la teneur en eau, la matière (M) est comprimée au moins jusqu'à ce que les interstices remplis de gaz aient la teneur résiduelle en air exigée.
  4. Procédé selon l'une quelconque des revendications précédentes,
       caractérisé en ce que,
       par compression (3, 4) avec modification de la teneur en eau, la matière (M) est comprimée à une teneur en matières solides supérieure à 15 %, de préférence de 20 à 35 %, et est en l'occurrence désaérée, et en ce que le traitement (1) à haute température est effectué immédiatement après.
  5. Procédé selon l'une quelconque des revendications précédentes,
       caractérisé en ce que,
       avant ou lors du traitement (1) à haute température, la matière (M) est balayée avec une vapeur (D) et est en l'occurrence simultanément chauffée.
  6. Procédé selon la revendication 5,
       caractérisé en ce que
       la vapeur (D) est de la vapeur d'eau.
  7. Procédé selon la revendication 5 ou 6,
       caractérisé en ce que
       la matière (M) est comprimée par compression (3, 4) à une teneur en matières solides supérieure à 15 %, de préférence de 20 à 35 %, et est ensuite expansée, et en ce que le balayage à la vapeur (D) est effectué lors de l'expansion.
  8. Procédé selon la revendication 5, 6 ou 7,
       caractérisé en ce que
       la matière (M) est ameublie après la compression (3, 4).
  9. Procédé selon la revendication 5, 6, 7 ou 8,
       caractérisé en ce que
       la vapeur (D) et la matière (M) sont déplacées à contre-courant.
  10. Procédé selon l'une quelconque des revendications 3 à 9,
       caractérisé en ce que
       un chauffage à une température d'au moins 120 °C est effectué après l'expansion et/ou l'ameublissement, et en ce que la matière est ensuite empilée ou transportée pendant au moins deux secondes à une température supérieure à 120 °C.
  11. Procédé selon l'une quelconque des revendications précédentes,
       caractérisé en ce que
       une dispersion (2) ou un malaxage de la matière est effectué immédiatement après le traitement (1) à haute température.
  12. Procédé selon l'une quelconque des revendications 1 à 10,
       caractérisé en ce que
       une dispersion (2) ou un malaxage de la matière est effectué simultanément avec le traitement (1) à haute température.
  13. Procédé selon l'une quelconque des revendications précédentes,
       caractérisé en ce que,
       du peroxyde est ajouté à la matière (M) pour le traitement (1) à haute température.
  14. Procédé selon l'une quelconque des revendications précédentes,
       caractérisé en ce que
       au moins 4 % de peroxyde sont ajoutés à la matière (M, M1), rapportés à la teneur en substance sèche de la matière (M, M1).
  15. Procédé selon l'une quelconque des revendications précédentes,
       caractérisé en ce que
       le traitement (1) à haute température est effectué sans produits chimiques à action réductrice.
  16. Procédé selon l'une quelconque des revendications précédentes,
       caractérisé en ce que
       la teneur en matières solides rapportée à la masse de la matière est comprise entre 15 et 80 %.
  17. Procédé selon l'une quelconque des revendications précédentes,
       caractérisé en ce que
       les matières solides de la matière sont pour l'essentiel constituées de vieux papiers.
  18. Dispositif destiné à la mise en oeuvre du procédé selon l'une quelconque des revendications précédentes, comportant un dispositif de compression pour la matière (M) contenant des fibres de papier destiné à engendrer un tampon de matière, et un dispositif de chauffage raccordé directement en aval, qui est muni de moyens pour l'alimentation directe de vapeur (D), de sorte que le tampon soit transporté dans le dispositif de chauffage en raison de l'effet d'entraínement du dispositif de compression, caractérisé en ce que la teneur en substance sèche du tampon de matière est comprise entre 10 et 40 %, et en ce que le dispositif de chauffage est muni d'une sortie de gaz (12), et en ce qu'il est prévu des moyens pour la génération d'un courant de balayage par la sortie de gaz (12) à l'aide de la vapeur (D) injectée, lequel est engendré par le fait que la vapeur injectée extrait l'air résiduel de la matière (M), et l'évacue par la sortie de gaz (12).
  19. Dispositif selon la revendication 18,
       caractérisé en ce que
       le dispositif de chauffage peut fonctionner en surpression.
  20. Dispositif selon la revendication 18 ou 19,
       caractérisé en ce que
       le dispositif de chauffage est une vis sans fin de chauffage (14).
  21. Dispositif selon la revendication 18 ou 19,
       caractérisé en ce que
       le dispositif de chauffage est un malaxeur ou un disperseur pouvant fonctionner avec une alimentation en vapeur.
EP99115241A 1998-10-02 1999-08-02 Procédé pour tuer des germes dans un matériau contenant des fibres pour papeterie et dispositif pour l' application du procédé Expired - Lifetime EP0990733B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19845513 1998-10-02
DE19845513A DE19845513A1 (de) 1998-10-02 1998-10-02 Verfahren zur Abtötung von Keimen in papierfaserhaltigem Material sowie Vorrichtungen zur Durchführung des Verfahrens

Publications (2)

Publication Number Publication Date
EP0990733A1 EP0990733A1 (fr) 2000-04-05
EP0990733B1 true EP0990733B1 (fr) 2004-01-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP99115241A Expired - Lifetime EP0990733B1 (fr) 1998-10-02 1999-08-02 Procédé pour tuer des germes dans un matériau contenant des fibres pour papeterie et dispositif pour l' application du procédé

Country Status (3)

Country Link
EP (1) EP0990733B1 (fr)
AT (1) ATE258247T1 (fr)
DE (2) DE19845513A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005026219B4 (de) 2005-06-07 2007-12-13 Poly-Clip System Gmbh & Co. Kg Clipmaschine und Verfahren zum Einrichten einer Clipmaschine
DE102008053456A1 (de) 2008-10-28 2010-04-29 Poly-Clip System Gmbh & Co. Kg Clipdrucküberwachung mit Piezo-Aufnehmer
FI125635B (fi) * 2015-02-05 2015-12-31 Valmet Technologies Oy Laite dispergoitavan kiertokuitumassan esilämmittämiseksi

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3741863A (en) * 1971-08-27 1973-06-26 Rust Eng Co Method of recycling waste cellulosic materials
US3891497A (en) * 1973-03-22 1975-06-24 Beloit Corp Non-aqueous defiberizing process of waste paper in the presence of steam and a liquid nonmiscible in water, e.g., tetrachlorethylene
SE371657B (fr) * 1973-04-05 1974-11-25 Wallen & Co Ab Lennart
SE7506271L (sv) * 1975-06-02 1976-12-03 Sellbergs Ab A Z Sett att framstella hygieniserat returpapper fran pappershaltigt avfall, speciellt hushallsavfall
IT1071347B (it) * 1976-03-12 1985-04-02 Interox Sa Processo per la disinfezione di carta vecchia
FR2357684A1 (fr) * 1976-03-12 1978-02-03 Interox Procede pour la desinfection des vieux papiers
FR2406022A1 (fr) * 1977-10-17 1979-05-11 Omnium Francais Indl Cal Procede utilisant un vide prealable pour la fabrication de pates a papier
CH649330A5 (en) * 1980-11-25 1985-05-15 Escher Wyss Gmbh Process for increasing the specific volume in the reprocessing of waste paper pulp
DE3610940A1 (de) * 1986-03-04 1987-09-10 Escher Wyss Gmbh Hochtemperatur-hochkonsistenz-schnellbleiche
NO159494C (no) * 1986-10-23 1989-01-04 Kvaerner Eureka As Fremgangsmaate ved bleking av cellulosemasse eller fraksjon derav, anlegg til bruk ved gjennomfoeringen av fremgangsmaaten.
US5262003A (en) * 1991-09-18 1993-11-16 The Black Clawson Company Method and system for defibering paper making materials
FI934281A0 (fi) * 1993-09-29 1993-09-29 Antti Aho Foerbehandling av flis
SE502555C2 (sv) * 1994-03-15 1995-11-13 Ingemar Bystedt Sätt och anordning för impregnering av vedstycken vid framställning av slipmassa

Also Published As

Publication number Publication date
EP0990733A1 (fr) 2000-04-05
DE19845513A1 (de) 2000-04-06
ATE258247T1 (de) 2004-02-15
DE59908351D1 (de) 2004-02-26

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