WO2014191243A1 - Approach flow system - Google Patents

Approach flow system Download PDF

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Publication number
WO2014191243A1
WO2014191243A1 PCT/EP2014/060179 EP2014060179W WO2014191243A1 WO 2014191243 A1 WO2014191243 A1 WO 2014191243A1 EP 2014060179 W EP2014060179 W EP 2014060179W WO 2014191243 A1 WO2014191243 A1 WO 2014191243A1
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WO
WIPO (PCT)
Prior art keywords
pulp suspension
dilution
arrangement according
mixing device
cleaning device
Prior art date
Application number
PCT/EP2014/060179
Other languages
German (de)
French (fr)
Inventor
Axel Erzler
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 WO2014191243A1 publication Critical patent/WO2014191243A1/en

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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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/26—De-aeration of paper stock
    • 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
    • D21F1/08—Regulating consistency
    • 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 an arrangement for producing a pulp suspension for a headbox of a machine for producing a paper, board, tissue or other fibrous web with a mixing device in which the pulp suspension is mixed for predilution with a diluent, wherein the prediluted pulp suspension via at least one cleaning device is guided to a degassing and the pulp suspension flows between the cleaning device and degassing by another mixing device in which the pulp suspension is mixed for subsequent dilution with a diluent.
  • the highly consistent pulp suspension formed essentially of processed fibers and fillers is diluted with the white water collected in the paper machine and then fed to the headbox.
  • the white water originating in particular from the former of the paper machine contains a relatively high proportion of gas. In order not to interfere with the process of manufacturing the fibrous web and its quality, therefore, a degassing is often required.
  • the consistency of the pulp suspension to be cleaned should be as high as possible. Therefore, a re-dilution is often required.
  • the redilution takes place via a mixing device that is part of a white water collection container. From there, the pulp suspension must then be conveyed via a pump to the degassing device.
  • the object of the invention is therefore the required pump power and the To minimize the cost of cleaning the pulp suspension as low as possible.
  • the object has been achieved in that the further mixing device is formed by at least one mixing chamber, which flows through the purified pulp suspension and into which the diluting liquid is injected.
  • Hydrocyclones should be used with advantage here. Hydrocyclones are well suited to concentrate by centrifugal forces heavy parts and light parts in pulp suspensions and to discharge via the outlet or the separator.
  • the dilution liquid should also be formed, at least essentially, by white water to conserve resources.
  • the prediluted pulp suspension should be conveyed to the cleaning device via a suspension pump.
  • the dilution liquid should also be transported from one dilution pump to another mixing device.
  • a simplification of the structure is possible if, in spite of separate mixing devices, the dilution liquid for the predilution and for the after-dilution are removed from a common collecting container. After the degassing device, the pulp suspension is then advantageously conveyed by a headbox pump to the headbox of the machine.
  • the further mixing device should be arranged as close as possible to the cleaning device.
  • the figure shows a plant schematic.
  • the pulp suspension 1 is injected at high pressure into a white water collecting tank 10 and prediluted by the mixing with the white water 3.
  • the prediluted pulp suspension 1 is conveyed by means of suspension pump 7 to a cleaning device 4, which is formed by a plurality of hydrocyclones.
  • the hydrocyclones described here are used to clean a pulp suspension 1 with a consistency between 2 and 3% of heavy parts. Because of the high consistency, the cleaning device 4 can be made smaller.
  • the fixed housing of the hydrocyclone encloses an elongated chamber of circular cross-section.
  • At one end of the chamber there is an inlet through which the pulp suspension 1 to be cleaned tangentially at a pressure of up to 4 or even 6 bar in a cylindrical inlet section of Kannanner is injected.
  • the pulp suspension 1 is brought to a circular path, wherein the pulp suspension 1 is pressed against the wall of the chamber.
  • centrifugal and centrifugal forces accumulate the heavy parts on the wall of the chamber and the light parts in the middle of the chamber.
  • the heavy parts on the wall of the chamber reach spirally to the opposite end of the chamber with the heavy part separator, through which the heavy parts are removed from the hydrocyclone.
  • dilution liquid is passed into the chamber in the region of the heavy-part separator via a feed line.
  • the existing in the middle of the chamber, purified from the heavy parts pulp suspension 1 is discharged as a lightweight component on the light-part drain.
  • the thus cleaned pulp suspension 1 passes immediately after the cleaning device 4 in a further mixing device 6.
  • This mixing device 6 is essentially formed by a mixing chamber, which is flowed through by the pulp suspension 1.
  • dilution liquid 3 from the white water collecting container 10 is also injected into the mixing chamber via several nozzles.
  • the white water is conveyed by a dilution pump 8 from the white water collecting container 10 to the further mixing device 6.
  • the pulp suspension 1 passes without additional pump from the post-dilution to the degassing 5.
  • the further mixing device 6 may be constructed, for example, similar to a venturi.
  • degassing 5 degassing is carried out in a known manner by means of negative pressure.
  • the thus degassed pulp suspension 1 is then transported by means of headbox pump 9 to the headbox of the paper machine.
  • the invention thus also enables a simple retrofitting of existing systems with a re-dilution.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

The invention relates to an assembly for producing a fibrous material suspension (1) for a headbox of a machine for producing paper, board, tissue or a different fibrous material web having a mixing device (2), in which the fibrous material suspension (1) is mixed with a diluting liquid (3) for pre-dilution, wherein the pre-diluted fibrous material suspension (1) is conducted to a degassing device (5) via at least one cleaning device (4) and the fibrous material suspension (1) flows through an additional mixing device (6) between the cleaning device (4) and the degassing device (5) in which the fibrous material suspension (1) is mixed with a diluting liquid (3) for subsequent dilution.

Description

Konstantteil  constant part
Die Erfindung betrifft eine Anordnung zur Erzeugung einer Faserstoffsuspension für einen Stoffauflauf einer Maschine zur Herstellung einer Papier-, Karton-, Tissue- oder einen anderen Faserstoffbahn mit einer Mischvorrichtung, in der die Faserstoffsuspension zur Vorverdünnung mit einer Verdünnungsflüssigkeit gemischt wird, wobei die vorverdünnte Faserstoffsuspension über wenigstens eine Reinigungsvorrichtung zu einer Entgasungsvorrichtung geführt wird und die Faserstoffsuspension zwischen Reinigungsvorrichtung und Entgasungsvorrichtung durch eine weitere Mischvorrichtung strömt, in der die Faserstoffsuspension zur Nachverdünnung mit einer Verdünnungsflüssigkeit vermischt wird. The invention relates to an arrangement for producing a pulp suspension for a headbox of a machine for producing a paper, board, tissue or other fibrous web with a mixing device in which the pulp suspension is mixed for predilution with a diluent, wherein the prediluted pulp suspension via at least one cleaning device is guided to a degassing and the pulp suspension flows between the cleaning device and degassing by another mixing device in which the pulp suspension is mixed for subsequent dilution with a diluent.
Im Konstantteil von Papiermaschinen wird die im Wesentlichen von aufbereiteten Fasern und Füllstoffen gebildete, hochkonsistente Faserstoffsuspension mit dem in der Papiermaschine aufgefangenen Siebwasser verdünnt und anschließend dem Stoffauflauf zugeführt. In the constant part of paper machines, the highly consistent pulp suspension formed essentially of processed fibers and fillers is diluted with the white water collected in the paper machine and then fed to the headbox.
Das insbesondere aus dem Former der Papiermaschine stammende Siebwasser enthält einen relativ hohen Gasanteil. Um den Prozess der Herstellung der Faserstoffbahn sowie deren Qualität nicht zu beeinträchtigen, ist daher häufig eine Entgasung erforderlich.  The white water originating in particular from the former of the paper machine contains a relatively high proportion of gas. In order not to interfere with the process of manufacturing the fibrous web and its quality, therefore, a degassing is often required.
Damit der Aufwand für die Reinigung möglichst klein bleibt, soll die Stoffdichte der zu reinigenden Faserstoffsuspension möglichst hoch sein. Daher ist oft eine Nachverdünnung erforderlich. Die Nachverdünnung erfolgt dabei über eine Mischvorrichtung, die Teil eines Siebwassersammelbehälters ist. Von dort muss die Faserstoffsuspension dann über eine Pumpe zur Entgasungsvorrichtung gefördert werden.  So that the effort for cleaning remains as small as possible, the consistency of the pulp suspension to be cleaned should be as high as possible. Therefore, a re-dilution is often required. The redilution takes place via a mixing device that is part of a white water collection container. From there, the pulp suspension must then be conveyed via a pump to the degassing device.
Dies erfordert eine große Pumpleistung und Umbauten sind sehr aufwendig. Die Aufgabe der Erfindung ist es daher die erforderliche Pumpleistung sowie den Aufwand für die Reinigung der Faserstoffsuspension möglichst gering zu halten. This requires a large pumping capacity and conversions are very expensive. The object of the invention is therefore the required pump power and the To minimize the cost of cleaning the pulp suspension as low as possible.
Erfindungsgemäß wurde die Aufgabe dadurch gelöst, dass die weitere Mischvorrichtung von zumindest einem Mischraum gebildet wird, der von der gereinigten Faserstoffsuspension durchströmt und in den die Verdünnungsflüssigkeit eingedüst wird. According to the invention the object has been achieved in that the further mixing device is formed by at least one mixing chamber, which flows through the purified pulp suspension and into which the diluting liquid is injected.
Da die Faserstoffsuspension die weitere Mischvorrichtung durchströmen kann, wird die Weiterführung derselben zur Entgasungsvorrichtung kaum beeinträchtigt. Infolgedessen ist auch keine Pumpe zwischen Mischvorrichtung und Entgasungsvorrichtung erforderlich. Der Faserstoffsuspensionsstrom der Nachverdünnung wird durch die Eindüsung nicht wesentlich gestört.  Since the pulp suspension can flow through the further mixing device, the continuation of the same to the degassing device is hardly affected. As a result, no pump between the mixing device and degassing is required. The pulp suspension stream of the post-dilution is not significantly disturbed by the injection.
Als Reinigungsvorrichtung sollten hierbei mit Vorteil Hydrozyklonen zum Einsatz kommen. Hydrozyklone sind gut geeignet, um durch Zentrifugalkräfte Schwerteile und Leichtteile in Faserstoffsuspensionen zu konzentrieren und über den Auslauf bzw. den Abscheider abzuleiten. As a cleaning device hydrocyclones should be used with advantage here. Hydrocyclones are well suited to concentrate by centrifugal forces heavy parts and light parts in pulp suspensions and to discharge via the outlet or the separator.
Des Weiteren sollte auch weiterhin zur Ressourcenschonung die Verdünnungsflüssigkeit zumindest im Wesentlichen von Siebwasser gebildet werden. Für die Gewährleistung eines ausreichenden Drucks am Einlauf der Reinigungsvorrichtung, insbesondere des Hydrozyklons sollte die vorverdünnte Faserstoffsuspension über eine Suspensions-Pumpe zur Reinigungsvorrichtung gefördert werden.  Furthermore, the dilution liquid should also be formed, at least essentially, by white water to conserve resources. To ensure sufficient pressure at the inlet of the cleaning device, in particular the hydrocyclone, the prediluted pulp suspension should be conveyed to the cleaning device via a suspension pump.
Um die Eindüsung der Verdünnungsflüssigkeit zu intensivieren, sollte ebenso die Verdünnungsflüssigkeit von einer Verdünnungs-Pumpe zur weiteren Mischvorrichtung befördert werden.  In order to intensify the injection of the dilution liquid, the dilution liquid should also be transported from one dilution pump to another mixing device.
Im Interesse eines einfachen Aufbaus und zur Beimischung einer großen Menge an Verdünnungsflüssigkeit ist für die Mischvorrichtung zur Vorverdünnung vorteilhaft, wenn sie Teil eines Sammelbehälters für die Verdünnungsflüssigkeit ist. Zur Vermischung wird dabei die Faserstoffsuspension mit hohem Druck in das Siebwasser geführt. In the interest of a simple construction and for admixing a large amount of dilution liquid is advantageous for the mixing device for predilution, if it is part of a collection container for the dilution liquid. to Mixing while the pulp suspension is conducted at high pressure in the white water.
Eine Vereinfachung des Aufbaus ist möglich, wenn trotz separater Mischvorrichtungen die Verdünnungsflüssigkeit für die Vorverdünnung und für die Nachverdünnung aus einem gemeinsamen Sammelbehälter entnommen werden. Nach der Entgasungsvorrichtung wird die Faserstoffsuspension dann mit Vorteil von einer Stoffauflaufpumpe zum Stoffauflauf der Maschine gefördert.  A simplification of the structure is possible if, in spite of separate mixing devices, the dilution liquid for the predilution and for the after-dilution are removed from a common collecting container. After the degassing device, the pulp suspension is then advantageously conveyed by a headbox pump to the headbox of the machine.
Um eine möglichst intensive Vermischung bis zum Erreichen der Entgasungsvorrichtung zu erreichen, sollte die weitere Mischvorrichtung möglichst nahe an der Reinigungsvorrichtung angeordnet sein. In order to achieve the most intensive possible mixing until reaching the degassing device, the further mixing device should be arranged as close as possible to the cleaning device.
Nachfolgend soll die Erfindung an einem Ausführungsbeispiel näher erläutert werden. In der beigefügten Zeichnung zeigt die Figur ein Anlagenschema. Im dargestellten Konstantteil einer Papiermaschine wird die Faserstoffsuspension 1 mit hohem Druck in einen Siebwasser-Sammelbehälter 10 eingedüst und durch die Vermischung mit dem Siebwasser 3 vorverdünnt. Von dem in Einströmrichtung der Faserstoffsuspension 1 folgenden Auslauf dieser Mischvorrichtung 2 wird die vorverdünnte Faserstoffsuspension 1 mittels Suspensions-Pumpe 7 zu einer Reinigungsvorrichtung 4 gefördert, die von mehreren Hydrozyklonen gebildet wird. The invention will be explained in more detail with reference to an exemplary embodiment. In the accompanying drawing, the figure shows a plant schematic. In the illustrated constant part of a paper machine, the pulp suspension 1 is injected at high pressure into a white water collecting tank 10 and prediluted by the mixing with the white water 3. From the following in the inflow direction of the pulp suspension 1 outlet of this mixing device 2, the prediluted pulp suspension 1 is conveyed by means of suspension pump 7 to a cleaning device 4, which is formed by a plurality of hydrocyclones.
Die hier beschriebenen Hydrozyklone dienen der Reinigung einer Faserstoffsuspension 1 mit einer Stoffdichte zwischen 2 und 3% von Schwerteilen. Wegen der hohen Stoffdichte kann die Reinigungsvorrichtung 4 kleiner ausgeführt werden. The hydrocyclones described here are used to clean a pulp suspension 1 with a consistency between 2 and 3% of heavy parts. Because of the high consistency, the cleaning device 4 can be made smaller.
Das feststehende Gehäuse des Hydrozyklons umschließt eine längliche Kammer mit kreisförmigem Querschnitt. The fixed housing of the hydrocyclone encloses an elongated chamber of circular cross-section.
An einem Ende der Kammer befindet sich ein Einlauf, über den die zu reinigende Faserstoffsuspension 1 tangential mit einem Druck von bis zu 4 oder sogar 6 bar in einen zylindrischen Einlaufabschnitt der Kannnner eingedüst wird. Hierdurch wird die Faserstoffsuspension 1 auf eine kreisförmige Bahn gebracht, wobei die Faserstoffsuspension 1 gegen die Wand der Kammer gedrückt wird. Durch die dabei wirkenden Zentrifugal- und Fliehkräfte reichern sich die Schwerteile an der Wand der Kammer und die Leichtteile in der Mitte der Kammer an. At one end of the chamber there is an inlet through which the pulp suspension 1 to be cleaned tangentially at a pressure of up to 4 or even 6 bar in a cylindrical inlet section of Kannanner is injected. As a result, the pulp suspension 1 is brought to a circular path, wherein the pulp suspension 1 is pressed against the wall of the chamber. By acting centrifugal and centrifugal forces accumulate the heavy parts on the wall of the chamber and the light parts in the middle of the chamber.
Auf diese Weise gelangen die Schwerteile an der Wand der Kammer spiralförmig zum gegenüberliegenden Ende der Kammer mit dem Schwerteil-Abscheider, über den die Schwerteile aus dem Hydrozyklon abgeführt werden. In this way, the heavy parts on the wall of the chamber reach spirally to the opposite end of the chamber with the heavy part separator, through which the heavy parts are removed from the hydrocyclone.
Um Verstopfungen des Schwerteil-Abscheiders entgegenzuwirken, wird im Bereich des Schwerteil-Abscheiders über eine Zuleitung Verdünnungsflüssigkeit in die Kammer geleitet. To counteract blockages of the heavy-part separator, dilution liquid is passed into the chamber in the region of the heavy-part separator via a feed line.
Dies erlaubt den störungsfreien Einsatz des Hydrozyklons auch bei hohen Stoffdichten, wie hier angestrebt.  This allows the trouble-free use of the hydrocyclone even at high material densities, as sought here.
Die in der Mitte der Kammer vorhandene, von den Schwerteilen gereinigte Faserstoffsuspension 1 wird als Leichtteil-Komponente über den Leichtteil-Abfluss abgeführt. The existing in the middle of the chamber, purified from the heavy parts pulp suspension 1 is discharged as a lightweight component on the light-part drain.
Die so gereinigte Faserstoffsuspension 1 gelangt unmittelbar nach der Reinigungsvorrichtung 4 in eine weitere Mischvorrichtung 6. Diese Mischvorrichtung 6 wird im Wesentlichen von einer Mischkammer gebildet, welche von der Faserstoffsuspension 1 durchströmt wird. Zur Verdünnung wird über mehrere Düsen außerdem Verdünnungsflüssigkeit 3 aus dem Siebwasser-Sammelbehälter 10 in die Mischkammer eingedüst. Hierzu wird das Siebwasser von einer Verdünnungs-Pumpe 8 vom Siebwasser-Sammelbehälter 10 zur weiteren Mischvorrichtung 6 gefördert. The thus cleaned pulp suspension 1 passes immediately after the cleaning device 4 in a further mixing device 6. This mixing device 6 is essentially formed by a mixing chamber, which is flowed through by the pulp suspension 1. For dilution, dilution liquid 3 from the white water collecting container 10 is also injected into the mixing chamber via several nozzles. For this purpose, the white water is conveyed by a dilution pump 8 from the white water collecting container 10 to the further mixing device 6.
Da der Strom der Faserstoffsuspension 1 möglichst wenig von der weiteren Mischvorrichtung 6 beeinträchtigt wird, gelangt die Faserstoffsuspension 1 ohne zusätzliche Pumpe von der Nachverdünnung zur Entgasungsvorrichtung 5. Hierzu kann die weitere Mischvorrichtung 6 beispielsweise ähnlich einer Venturidüse aufgebaut sein. In der Entgasungsvorrichtung 5 erfolgt die Entgasung in bekannter Weise mittels Unterdruck. Die so entgaste Faserstoffsuspension 1 wird dann mittels Stoffauflaufpumpe 9 zum Stoffauflauf der Papiermaschine befördert. Since the stream of pulp suspension 1 is affected as little as possible by the further mixing device 6, the pulp suspension 1 passes without additional pump from the post-dilution to the degassing 5. For this purpose, the further mixing device 6 may be constructed, for example, similar to a venturi. In the degassing 5 degassing is carried out in a known manner by means of negative pressure. The thus degassed pulp suspension 1 is then transported by means of headbox pump 9 to the headbox of the paper machine.
Die Erfindung ermöglicht somit auch eine einfache Nachrüstung bestehender Anlagen mit einer Nachverdünnung. The invention thus also enables a simple retrofitting of existing systems with a re-dilution.

Claims

Patentansprüche claims
1 . Anordnung zur Erzeugung einer Faserstoffsuspension (1 ) für einen Stoffauflauf einer Maschine zur Herstellung einer Papier-, Karton-, Tissue- oder einen anderen Faserstoffbahn mit einer Mischvorrichtung (2), in der die Faserstoffsuspension (1 ) zur Vorverdünnung mit einer Verdünnungsflüssigkeit1 . Arrangement for producing a pulp suspension (1) for a headbox of a machine for producing a paper, board, tissue or another fibrous web with a mixing device (2), in which the pulp suspension (1) for predilution with a dilution liquid
(3) gemischt wird, wobei die vorverdünnte Faserstoffsuspension (1 ) über wenigstens eine Reinigungsvorrichtung (4) zu einer Entgasungsvorrichtung (5) geführt wird und die Faserstoffsuspension (1 ) zwischen Reinigungsvorrichtung(3) is mixed, wherein the prediluted pulp suspension (1) via at least one cleaning device (4) to a degassing device (5) is guided and the pulp suspension (1) between the cleaning device
(4) und Entgasungsvorrichtung (5) durch eine weitere Mischvorrichtung (6) strömt, in der die Faserstoffsuspension (1 ) zur Nachverdünnung mit einer Verdünnungsflüssigkeit (3) vermischt wird, dadurch gekennzeichnet, dass die weitere Mischvorrichtung (6) von zumindest einem Mischraum gebildet wird, der von der gereinigten Faserstoffsuspension (1 ) durchströmt und in den die Verdünnungsflüssigkeit (3) eingedüst wird. (4) and degassing device (5) by a further mixing device (6) flows, in which the pulp suspension (1) for subsequent dilution with a diluent liquid (3) is mixed, characterized in that the further mixing device (6) formed by at least one mixing chamber is flowed through by the purified pulp suspension (1) and in which the dilution liquid (3) is injected.
2. Anordnung nach Anspruch 1 , dadurch gekennzeichnet, dass die2. Arrangement according to claim 1, characterized in that the
Reinigungsvorrichtung (4) von Hydrozyklonen gebildet wird. Cleaning device (4) is formed by hydrocyclones.
3. Anordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die3. Arrangement according to claim 1 or 2, characterized in that the
Verdünnungsflüssigkeit (3) zumindest im Wesentlichen von Siebwasser gebildet wird. Dilution liquid (3) is at least substantially formed by white water.
4. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die vorverdünnte Faserstoffsuspension (1 ) über eine Suspensions-Pumpe (7) zur Reinigungsvorrichtung (4) gefördert wird. 4. Arrangement according to one of the preceding claims, characterized in that the prediluted pulp suspension (1) via a suspension pump (7) to the cleaning device (4) is conveyed.
5. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Verdünnungsflüssigkeit (3) von einer Verdünnungs- Pumpe (8) zur weiteren Mischvorrichtung (6) befördert wird. 5. Arrangement according to one of the preceding claims, characterized in that the dilution liquid (3) from a dilution pump (8) to the further mixing device (6) is conveyed.
6. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Mischvorrichtung (2) zur Vorverdünnung Teil eines Sammelbehälters (10) für die Verdünnungsflüssigkeit (3) ist. 6. Arrangement according to one of the preceding claims, characterized in that the mixing device (2) for predilution part of a collecting container (10) for the dilution liquid (3).
7. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Verdünnungsflüssigkeit (3) für die Vorverdünnung und für die Nachverdünnung aus einem gemeinsamen Sammelbehälter (10) entnommen wird. 7. Arrangement according to one of the preceding claims, characterized in that the dilution liquid (3) for the predilution and for the subsequent dilution from a common collecting container (10) is removed.
8. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Faserstoffsuspension (1 ) nach der Entgasungsvorrichtung (5) von einer Stoffauflauf pumpe (9) zum Stoffauflauf der Maschine gefördert wird. 8. Arrangement according to one of the preceding claims, characterized in that the pulp suspension (1) after the degassing device (5) by a headbox pump (9) is conveyed to the headbox of the machine.
9. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die weitere Mischvorrichtung (6) möglichst nahe an der Reinigungsvorrichtung (4) angeordnet ist. 9. Arrangement according to one of the preceding claims, characterized in that the further mixing device (6) as close as possible to the cleaning device (4) is arranged.
PCT/EP2014/060179 2013-05-29 2014-05-19 Approach flow system WO2014191243A1 (en)

Applications Claiming Priority (2)

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DE102013210004.3 2013-05-29
DE201310210004 DE102013210004A1 (en) 2013-05-29 2013-05-29 constant part

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004042341A1 (en) * 2004-09-01 2006-03-09 Voith Paper Patent Gmbh Papermaking assembly has a first thinning station with a vacuum air bleed and a second thinning station with no vacuum air bleed
DE102010038694A1 (en) * 2010-07-30 2012-02-02 Voith Patent Gmbh constant part

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19859770A1 (en) * 1998-06-29 1999-12-30 Voith Sulzer Papiertech Patent Method and device for mixing suspension of substances
DE102006035956B3 (en) * 2006-08-02 2007-08-23 Voith Patent Gmbh Supplying a fiber suspension to the head box of a paper or cardboard machine comprises passing the suspension through a pressure sorter (operated in a closed system upstream of a head box pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004042341A1 (en) * 2004-09-01 2006-03-09 Voith Paper Patent Gmbh Papermaking assembly has a first thinning station with a vacuum air bleed and a second thinning station with no vacuum air bleed
DE102010038694A1 (en) * 2010-07-30 2012-02-02 Voith Patent Gmbh constant part

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