EP1126077A2 - Procédé et dispositif pour la préparation de la pâte - Google Patents

Procédé et dispositif pour la préparation de la pâte Download PDF

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Publication number
EP1126077A2
EP1126077A2 EP00125658A EP00125658A EP1126077A2 EP 1126077 A2 EP1126077 A2 EP 1126077A2 EP 00125658 A EP00125658 A EP 00125658A EP 00125658 A EP00125658 A EP 00125658A EP 1126077 A2 EP1126077 A2 EP 1126077A2
Authority
EP
European Patent Office
Prior art keywords
mixing tube
mixing pipe
individual components
main flow
pulp
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Withdrawn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
EP00125658A
Other languages
German (de)
English (en)
Other versions
EP1126077A3 (fr
Inventor
Erwin Binder
Hartwig Fischer
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 EP1126077A2 publication Critical patent/EP1126077A2/fr
Publication of EP1126077A3 publication Critical patent/EP1126077A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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

Definitions

  • the invention relates to a method for producing a finished stock suspension for the production of a paper or Cardboard web by adding newly processed fiber and Filler with possibly different properties and / or composition to form a white water cycle, preferably the white water I cycle, in the constant part a paper or board machine.
  • a white water cycle preferably the white water I cycle
  • the Invention the constant part of a paper or Board machine.
  • a similar process for blending thick matter into one existing white water cycle and a similar constant Part is, for example, from published patent application DE 32 44 142 A1 ( ⁇ US 4,477,313) known.
  • Here is one in several subdivided white water cycle previously prepared Thick matter via a mixing pump the white water supplied added again and the resulting material suspension one Headbox fed.
  • This thick matter consists in known way from fiber and fillers that according to the specifications of the paper maker before feeding processed in the white water cycle, i.e. in predetermined mixing ratios in a mixing chest is merged and mixed.
  • Figure 1 (composed of the Figures la and 1b) is a schematic representation of this Stock preparation in the constant part of the paper or Cardboard machine shown, being used for mixing the individual components of the fibers and fillers open mixing chest and an open machine chest be provided in which the uniform mixing of the individual components takes place.
  • the inventor has recognized that it is possible to use the individual Components of the stock suspension of a paper or Cardboard machine directly into a white water circuit feed in, to mix the individual components now no mixing chest is necessary, just a mixing tube is used, the main flow through a white water cycle is formed in which the new prepared fiber and fillers as individual components and without mixing them together beforehand.
  • Speeds and speed ratios Mixing of the individual components takes place.
  • the inventor proposes a process for the production of a finished stock suspension for the production of a paper or cardboard web by admixing newly processed fiber and filler with possibly different properties and / or composition to form a white water cycle, preferably the white water I cycle, in the constant part of a paper - or cardboard machine with at least the following process steps: leading a white water recirculating from the paper or cardboard machine, in particular white water I, into an optionally angled mixing tube (30) with a main flow direction and injection of a large number of, preferably newly prepared, individual components of the fiber and / or filler into the mixing tube (30), the flow rate in the mixing tube (5) being greater than 0.2 m / s, preferably greater than 0.45 m / s, and the flow rates of the supplied suspension in a nozzle v D and the Hauptstr the area around the nozzle v U mung form a ratio of D v / v U between 3-15.
  • this method does not find a first one Premix the individual components into a thick material instead of the individual components of the fiber and fillers directly into a white water Mixing tube injected, and the mixing of each Components takes place directly in the white water itself, so that this then as a finished stock suspension Manufacturing process can be supplied.
  • An advantageous embodiment of the invention The procedure is that at least part of the remaining recirculating suspension from the paper or Cardboard machine production is mixed in the mixing tube, whereby it is particularly advantageous if the rest recirculating suspensions in the mixing tube downstream of the Injection of individual components can be supplied.
  • a is preferably angled mixing tube used because of the bend of the mixing tube additional secondary currents in the mixing tube arise that the mixing process in its uniformity promote significantly.
  • the individual components before bending of the mixing tube are supplied. Can continue advantageous after the remaining recirculating suspensions be fed to the bend of the mixing tube.
  • the relative quantitative ratio of the individual components with Fibers is regulated to each other.
  • the type of scheme can according to the known methods, either via a speed-controlled pump or via a valve throttling of the Throughput of a pump.
  • the relative Quantity ratio between the total amount of Individual components with fibers and the total amount of Individual components with filler is regulated.
  • Regulation of the proportions can after the exit of the Mixing tube concentration measurements of each Components, i.e. the substances to be regulated, take place and the measurement result in the control loop as a controlled variable be used.
  • a constant part of a paper or board machine which is characterized in that a mixing tube with a main supply for white water recirculating from the paper machine, preferably white water I, is provided and this forms a main flow in the mixing tube, further that a A large number of individual injections into the main flow are provided for all the individual components required to produce a final stock suspension, the free flow cross sections in the mixing tube (30) and in the individual injections (1-6) being designed such that the flow velocity in the mixing tube (30) is greater than 0.2 m / s, preferably greater than 0.45 m / s and the flow velocities of the supplied suspension in a nozzle v D and the main flow of the environment around the nozzle v U is a ratio of v D / v U between 3-15 form.
  • An advantageous embodiment of the mixing tube provides that the injection of the individual components in the direction of Main flow are arranged one after the other.
  • the mixing tube can advantageously be angled, in order to mix the to improve individual components.
  • an injection for accept material can also be made a deculator and / or a 2nd stage vertical classifier and / or other recycle of acceptable substances are provided.
  • the injection of the individual components before the Injection of accept from a deculator and / or from a Vertical classifier 2nd stage and / or other Acceptable material recirculation is arranged. It is too advantageous the injection of the individual components before Bending the mixing tube and the injection of accepted material from a deculator and / or from a vertical classifier 2. Level and / or other material recirculation after the Angling the mixing tube is arranged
  • Figure 1 is composed of Figures la and 1b and shows the constant part of a paper or board machine, according to the prior art, each of the Middle part of the overall figure on the two figures 1a and 1b you can see.
  • FIG. 1 therefore shows that known in the prior art constant part of a paper or board machine for the Preparation of stock suspension for delivery to one Sectionally headed and volume-controlled headbox 17.
  • TMP Thermo mechanical pulp
  • DIP deinked paper
  • Filter waste via line 4 color and / or Chemicals via line 5 and filler via line 6.
  • the mixing chest 7 is for uniform mixing of the individual components and the desired one Processed thick matter.
  • the individual supply lines 1 to 6 have Control mechanisms that determine the quantitative relationships of the individual Adjust the components in the desired way to get the to achieve the correct final composition of the thick matter.
  • the thick matter produced in the mixing chest 7 is then passed into the machine chest 8, from where he the White water I container 9 is supplied.
  • a stock suspension with a slightly lower concentration will also from the Deculator Cleaner system via the supply line 15 to another vertical classifier 12 and from there via the Feed line 16 fed to the substance on run 17.
  • the two are different in the headbox 17 Concentrated stock suspensions, sectionally controlled, mixed and transferred to the wet section 18.
  • a measuring frame 28 is provided Information about the mass cross profile, the mass longitudinal profile and the ash content of the paper web produced collects and for the regulation of the composition of the White water is available.
  • the returned white water I 38 is fed into the mixing tube 30 initiated and in a main flow direction along the Center line 47 of the mixing tube 30 guided.
  • the individual components TMP are then in the mixing tube 30 via supply line 1, DIP via supply line 2, Committee from the paper or board machine over the Feed line 3, filter return material via feed line 4, finally paint and chemicals via the feed line 5 and filler supplied via the feed line 6.
  • the individual components are supplied here as examples in the vertical section of the mixing tube 30, in front of it Angling into the horizontal section.
  • the Supply via a nozzle 35 of accept material 36 from the deculator and accept material 37 from the vertical classifier 2nd stage. Because of the bending of the mixing tube becomes secondary currents generates a particularly good mix of each Components of the suspension cause.
  • Mixing tube 30 is the stock suspension via a feed pump 39 fed to a downstream classifier 44 and the Gutstoff 45 from the classifier the Deculator Cleaner system fed while the classifier return 46 of the processing is redirected.
  • the Control system 40 has a predetermined quantity ratio for the Components TMP, DIP, rejects and filter waste so that these components always in the specified proportions are supplied, with too low a concentration of fiber the total amount of these fiber over the Control system 40 can be increased or vice versa decreased.
  • control system 40 controls the addition of color and chemicals via control line 43.5, the can optionally be divided again to form the mixture to determine the individual chemicals.
  • control system 40 also controls that amount of filler supplied via control line 43.6, corresponding to that measured by the sensor 50 Concentration of filler in the finished stock suspension.
  • the optimal mixing takes place when the free flow cross sections of the mixing tube 30 and the respective nozzle 51 are designed such that the flow velocity v H in the mixing tube (30) is greater than 0.2 m / s, preferably greater than 0.45 m / s and the flow velocities of the supplied suspension in a nozzle v D and the main flow of the surroundings around the nozzle v U form a ratio of v D / v U between 3-15.

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  • Paper (AREA)
EP00125658A 2000-02-09 2000-11-23 Procédé et dispositif pour la préparation de la pâte Withdrawn EP1126077A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10005694 2000-02-09
DE2000105694 DE10005694A1 (de) 2000-02-09 2000-02-09 Verfahren zur Herstellung einer fertigen Stoffsuspension und konstanter Teil einer Papier- oder Kartonmaschine

Publications (2)

Publication Number Publication Date
EP1126077A2 true EP1126077A2 (fr) 2001-08-22
EP1126077A3 EP1126077A3 (fr) 2002-01-23

Family

ID=7630329

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00125658A Withdrawn EP1126077A3 (fr) 2000-02-09 2000-11-23 Procédé et dispositif pour la préparation de la pâte

Country Status (2)

Country Link
EP (1) EP1126077A3 (fr)
DE (1) DE10005694A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1467018A1 (fr) * 2003-04-09 2004-10-13 Voith Paper Patent GmbH Dispositif et procédé de mélange d'un liquide dans une suspension
ITFI20120154A1 (it) * 2012-07-25 2014-01-26 Toscotec S P A Impianto per la produzione di materiale cellulosico tramite una sospensione acquosa di fibre
EP2435631A4 (fr) * 2009-05-29 2015-09-23 Nalco Co Nouveau procédé et agencement pour introduire des produits chimiques dans un courant de traitement de pâte
CN103572636B (zh) * 2012-07-25 2016-11-30 托斯克科技股份公司 用于由纤维素纤维的水悬浮液生产纤维素幅材的系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006036018B3 (de) * 2006-08-02 2008-01-31 Voith Patent Gmbh Verfahren zur Zuführung einer Faserstoffsuspension zu einem Stoffauflauf einer Papiermaschine
DE102009006715A1 (de) * 2009-01-29 2010-08-05 Voith Patent Gmbh Ausschussaufbereitung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4125513A1 (de) * 1991-08-01 1993-02-04 Escher Wyss Gmbh Verfahren zum vermischen von suspendiertem faserstoff sowie vorrichtungen zu dessen ausfuehrung
EP0969142A2 (fr) * 1998-06-29 2000-01-05 Voith Sulzer Papiertechnik Patent GmbH Procédé et dispositif pour mélanger des suspensions de pâte à papier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE428811B (sv) * 1981-12-03 1983-07-25 Karlstad Mekaniska Ab Forfarande och anordning for framstellning av en flerskiktad pappersbana
DE19859770A1 (de) * 1998-06-29 1999-12-30 Voith Sulzer Papiertech Patent Verfahren und Vorrichtung zum Mischen von Sroffsuspension

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4125513A1 (de) * 1991-08-01 1993-02-04 Escher Wyss Gmbh Verfahren zum vermischen von suspendiertem faserstoff sowie vorrichtungen zu dessen ausfuehrung
EP0969142A2 (fr) * 1998-06-29 2000-01-05 Voith Sulzer Papiertechnik Patent GmbH Procédé et dispositif pour mélanger des suspensions de pâte à papier

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1467018A1 (fr) * 2003-04-09 2004-10-13 Voith Paper Patent GmbH Dispositif et procédé de mélange d'un liquide dans une suspension
EP2435631A4 (fr) * 2009-05-29 2015-09-23 Nalco Co Nouveau procédé et agencement pour introduire des produits chimiques dans un courant de traitement de pâte
ITFI20120154A1 (it) * 2012-07-25 2014-01-26 Toscotec S P A Impianto per la produzione di materiale cellulosico tramite una sospensione acquosa di fibre
EP2690216A1 (fr) * 2012-07-25 2014-01-29 Toscotec S.P.A. Système de production d'une bande de cellulose à partir d'une suspension aqueuse de fibres de cellulose
CN103572636A (zh) * 2012-07-25 2014-02-12 托斯克科技股份公司 用于由纤维素纤维的水悬浮液生产纤维素幅材的系统
CN103572636B (zh) * 2012-07-25 2016-11-30 托斯克科技股份公司 用于由纤维素纤维的水悬浮液生产纤维素幅材的系统

Also Published As

Publication number Publication date
DE10005694A1 (de) 2001-08-16
EP1126077A3 (fr) 2002-01-23

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