DE102004054236B4 - Method for mixing suspensions of different compositions - Google Patents
Method for mixing suspensions of different compositions Download PDFInfo
- Publication number
- DE102004054236B4 DE102004054236B4 DE102004054236A DE102004054236A DE102004054236B4 DE 102004054236 B4 DE102004054236 B4 DE 102004054236B4 DE 102004054236 A DE102004054236 A DE 102004054236A DE 102004054236 A DE102004054236 A DE 102004054236A DE 102004054236 B4 DE102004054236 B4 DE 102004054236B4
- Authority
- DE
- Germany
- Prior art keywords
- mixing
- pump
- pulp suspension
- suspension
- mixing device
- 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 - Fee Related
Links
Classifications
-
- 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
- D21D5/02—Straining or screening the pulp
-
- 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
- D21B1/34—Kneading or mixing; Pulpers
- D21B1/342—Mixing apparatus
Abstract
Description
Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Anspruchs 1.The The invention relates to a method according to the preamble of the claim 1.
Ein solches Verfahren wird zur Hauptsache angewendet, um in der Stoffaufbereitung oder im Konstanten Teil einer Papierfabrik die Stoffdichte der Faserstoffsuspensionen zu reduzieren. Bekanntlich wird bei Durchführung der meisten Prozessschritte solcher Anlagen eine bestimmte Konsistenz der behandelten Faserstoffsuspension eingestellt, was schon allein deshalb sinnvoll ist, da die optimale Wirkung der Prozessschritte jeweils meist nur mit einer definierten Konsistenz erreichbar ist. In den Fällen, in denen eine Absenkung der Konsistenz durchgeführt werden soll, wird einer dickeren Faserstoffsuspension eine Verdünnungsflüssigkeit, z.B. Rückwasser, zugemischt. Dies geschieht üblicherweise in Zwischenbütten oder mit Hilfe von Pumpen, in denen die zu vermischenden Anteile zusammengeführt werden. Im Falle der Verwendung von Bütten wird in Kauf genommen, dass zusätzliche platzaufwändige Behälter und Pumpen installiert werden müssen. Die im geschlossenen System vorhandene Druckenergie geht beim Einlauf in die Bütte verloren. Bei der Verwendung von Mischpumpen kann es von Nachteil sein, dass der Grad der Durchmischung vom jeweiligen Prozesszustand abhängig ist, z.B. wenn wegen unterschiedlicher Durchsätze unterschiedliche Drehzahlen der Pumpe einzustellen sind. Als Folge davon kann das Mischergebnis uneinheitlich sein. Es ist auch klar, dass jede zusätzliche Pumpe einen zusätzlichen Energiebedarf hat.One Such process is mainly applied to in stock preparation or in the constant part of a paper mill, the consistency of the pulp suspensions to reduce. As is known, when performing most of the process steps such Plants a certain consistency of the treated pulp suspension adjusted, which makes sense alone, because the optimal Effect of the process steps usually only with a defined Consistency is achievable. In cases where a subsidence consistency should, a thicker pulp suspension is a dilution liquid, e.g. Return water, mixed. This usually happens in intermediate bundles or with the help of pumps, in which the parts to be mixed together become. In the case of using handmade paper is accepted, that extra space-consuming containers and Pumps must be installed. The pressure energy present in the closed system passes at the inlet in the chest lost. When using mixing pumps, it can be disadvantageous that the degree of mixing depends on the respective process state, e.g. if different speeds because of different throughputs to adjust the pump. As a result, the mixing result be uneven. It is also clear that every extra Pump an extra Energy needs.
Die
Der Erfindung liegt die Aufgabe zu Grunde, ein Verfahren der eingangs genannten Art zu schaffen, mit dem es gelingt, eine homogene Stoffdichte im Prozess unabhängig von Produktions- und Mengenschwankungen zu erreichen.Of the Invention is based on the object, a method of the initially to create a type, with which it is possible to achieve a homogeneous consistency in the Process independent to achieve production and volume fluctuations.
Diese Aufgabe wird durch die im Anspruch 1 genannten Merkmale gelöst.These The object is achieved by the features mentioned in claim 1.
Mit Hilfe des erfindungsgemäßen Verfahrens ist es möglich, auf besonders wirtschaftliche Weise eine Verdünnung der vor dem Stoffauflauf einer Papier- oder Kartonmaschine, d.h. in der Stoffaufbereitung oder im Konstanten Teil einer Papierfabrik geführten Faserstoffsuspension vorzunehmen. Die dabei verwendete Verdünnungsflüssigkeit kann vorzugsweise aus Rückwasser gebildet werden, welches z.B. aus Eindickern in der Stoffaufbereitung oder aus der Siebpartie der Papiermaschine stammt. Solche Rückwasser können direkt eingesetzt oder vorher einer Klärung (Entstoffung) unterzogen werden. Mit dem Verfahren werden die Flüssigkeiten so vermischt, dass weder bewegte, z.B. rotierend angetriebene Rühr- oder Mischorgane, noch ein Pumpenlaufrad die Mischwirkung erhöht, so dass also die Mischenergie aus der Strömungsenergie der zu mischenden Flüssigkeiten stammt. Auf diese Weise wird nicht nur der apparative Aufwand reduziert, sondern auch der Energieeinsatz für Pumpen oder Mischer.With Help of the method is it is possible in a particularly economical way, a dilution of the headbox a paper or board machine, i. in the stock preparation or in the constant part of a paper factory guided pulp suspension make. The dilution liquid used may preferably from backwater are formed, which e.g. from thickening in stock preparation or comes from the wire section of the paper machine. Such backwaters can used directly or previously subjected to clarification (Entstoffung) become. The process mixes the liquids so that neither moving, e.g. rotating driven stirring or mixing elements, still a pump impeller increases the mixing effect, so that is the mixing energy from the flow energy the liquids to be mixed comes. In this way, not only the expenditure on equipment is reduced, but also the energy input for pumps or mixers.
Die zur Durchführung des Verfahrens verwendete Mischvorrichtung kann ein hydraulischer oder auch ein statischer Mischer sein. Beim hydraulischen Mischer wird die Verdünnungsflüssigkeit im Gleichstrom, Kreuzstrom, Gegenstrom oder in einer Kombination dieser Varianten in die dickere Faserstoffsuspension eingegeben. Vorzugsweise ist eine Düse zu verwenden, durch die eine relativ hohe Differenzgeschwindigkeit zwischen der Hauptströmung in der Mischvorrichtung und der Verdünnungsflüssigkeit erzeugt werden kann, z.B. in einem Bereich zwischen 5 und 15 m/sec. Die Verdünnungsflüssigkeit kann in derselben Richtung wie die Hauptströmung zugeführt werden, also in einer Gleichstromschaltung. Gegebenenfalls ist es aber auch sinnvoll, die Verdünnungsflüssigkeit seitlich (Kreuzstrom) oder gegen die Strömungsrichtung der Hauptströmung zuzugeben. Um eine ausreichende Vermischung zu erreichen, ist es in der Regel zweckmäßig, nach dem Zusammenführen der Flüssigkeiten eine gerade Rohrleitungsstrecke vorzusehen, deren Länge mindestens dem Zweifachen, vorzugsweise mindestens dem Fünffachen des Rohrinnendurchmessers entspricht. Die Mischwirkung kann, falls erforderlich, durch einen an sich bekannten statischen Mischer weiter gesteigert werden. In diesem Falle ist bei der Zuführung eine geringere Differenzgeschwindigkeit zwischen den zu vermischenden Flüssigkeiten ausreichend.The to carry out The mixing device used in the method can be a hydraulic or also be a static mixer. When hydraulic mixer is the dilution liquid in cocurrent, cross current, countercurrent or in combination these variants entered into the thicker pulp suspension. Preferably, a nozzle to use, due to a relatively high differential speed between the mainstream in the mixing device and the dilution liquid can be generated e.g. in a range between 5 and 15 m / sec. The dilution liquid can in the same direction as the main flow, ie in a DC circuit. Optionally, it is also useful, the dilution liquid Add laterally (cross flow) or against the flow direction of the main flow. In order to achieve a sufficient mixing, it is usually appropriate, after merging of liquids to provide a straight pipe route whose length is at least twice, preferably at least five times the inner tube diameter equivalent. The mixing effect can, if necessary, by a per se known static mixer to be further increased. In this case is at the feeder a lower differential speed between the ones to be mixed liquids sufficient.
Die Erfindung und ihre Vorteile werden erläutert an Hand von schematischen Zeichnungen. Dabei zeigen:The Invention and its advantages will be explained with reference to schematic Drawings. Showing:
Eine
wichtige Anwendung des erfindungsgemäßen Verfahrens ist die Verdünnung von
Stoffströmen
in einer mehrstufigen Sortiereranlage einer Papierfabrik. Ein solcher
Fall ist in
Eine
Stoffpumpe
In
Wie
Die
Querschnitte von Düsenrohr
Hydraulische
Mischung zur Durchführung des
erfindungsgemäßen Verfahrens
kann auch durch Querströmungen
(
Ergänzend zu
Claims (8)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004054236A DE102004054236B4 (en) | 2004-11-10 | 2004-11-10 | Method for mixing suspensions of different compositions |
DE502005005250T DE502005005250D1 (en) | 2004-11-10 | 2005-10-13 | Method and device for mixing suspensions |
EP05022328A EP1657356B1 (en) | 2004-11-10 | 2005-10-13 | Method and device for mixing suspensions |
ES05022328T ES2314537T3 (en) | 2004-11-10 | 2005-10-13 | PROCEDURE AND DEVICE FOR MIXING SUSPENSIONS. |
AT05022328T ATE407256T1 (en) | 2004-11-10 | 2005-10-13 | METHOD AND DEVICE FOR MIXING SUSPENSIONS |
CN200510119311.0A CN1773012B (en) | 2004-11-10 | 2005-11-03 | Method and device for mixing suspensions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004054236A DE102004054236B4 (en) | 2004-11-10 | 2004-11-10 | Method for mixing suspensions of different compositions |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102004054236A1 DE102004054236A1 (en) | 2006-05-18 |
DE102004054236B4 true DE102004054236B4 (en) | 2007-06-06 |
Family
ID=35782763
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102004054236A Expired - Fee Related DE102004054236B4 (en) | 2004-11-10 | 2004-11-10 | Method for mixing suspensions of different compositions |
DE502005005250T Active DE502005005250D1 (en) | 2004-11-10 | 2005-10-13 | Method and device for mixing suspensions |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE502005005250T Active DE502005005250D1 (en) | 2004-11-10 | 2005-10-13 | Method and device for mixing suspensions |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1657356B1 (en) |
CN (1) | CN1773012B (en) |
AT (1) | ATE407256T1 (en) |
DE (2) | DE102004054236B4 (en) |
ES (1) | ES2314537T3 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT15159U1 (en) * | 2014-11-24 | 2017-01-15 | Voith Patent Gmbh | Approach flow sorting |
WO2017043066A1 (en) * | 2015-09-11 | 2017-03-16 | セイコーエプソン株式会社 | Sheet production device and sheet production method |
SE1650410A1 (en) * | 2016-03-30 | 2017-10-01 | Valmet Oy | Screen feed arrangement |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1561697A1 (en) * | 1967-04-15 | 1970-10-01 | Voith Gmbh J M | Process for the continuous dilution and / or mixing of long, spinning-prone fibers containing suspensions and apparatus for carrying out this process |
DE4125513A1 (en) * | 1991-08-01 | 1993-02-04 | Escher Wyss Gmbh | Fibre suspension mixing - introduces thick suspension into centre of thin suspension flow at a faster speed with turbulence |
DE69915737T2 (en) * | 1998-06-29 | 2004-08-12 | Voith Paper Patent Gmbh | Method and device for measuring fiber suspensions |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3839145A (en) * | 1970-09-17 | 1974-10-01 | K Bueckle | Apparatus for and method of forming a fiber suspension and for delivering it to the wire of a machine for manufacturing non-woven materials |
FI104384B (en) * | 1998-06-05 | 2000-01-14 | Valmet Corp | Apparatus and Method for Mixing Freshwater and Fresh Mass in a Post-Wastewater Canal |
EP0969142B1 (en) * | 1998-06-29 | 2004-03-24 | Voith Paper Patent GmbH | Process and device for mixing stock suspensions |
DE10050109A1 (en) * | 2000-10-09 | 2002-04-11 | Voith Paper Patent Gmbh | Preparation of a fiber suspension, as paper/cardboard pulp, has a mixing pipe for the main mixed suspension flow with an elbow where an additional suspension is injected with a bulking agent |
FI111391B (en) * | 2001-04-23 | 2003-07-15 | Metso Paper Inc | Process and process arrangement in the short circulation of a paper machine |
-
2004
- 2004-11-10 DE DE102004054236A patent/DE102004054236B4/en not_active Expired - Fee Related
-
2005
- 2005-10-13 ES ES05022328T patent/ES2314537T3/en active Active
- 2005-10-13 DE DE502005005250T patent/DE502005005250D1/en active Active
- 2005-10-13 EP EP05022328A patent/EP1657356B1/en not_active Not-in-force
- 2005-10-13 AT AT05022328T patent/ATE407256T1/en active
- 2005-11-03 CN CN200510119311.0A patent/CN1773012B/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1561697A1 (en) * | 1967-04-15 | 1970-10-01 | Voith Gmbh J M | Process for the continuous dilution and / or mixing of long, spinning-prone fibers containing suspensions and apparatus for carrying out this process |
DE4125513A1 (en) * | 1991-08-01 | 1993-02-04 | Escher Wyss Gmbh | Fibre suspension mixing - introduces thick suspension into centre of thin suspension flow at a faster speed with turbulence |
DE69915737T2 (en) * | 1998-06-29 | 2004-08-12 | Voith Paper Patent Gmbh | Method and device for measuring fiber suspensions |
Also Published As
Publication number | Publication date |
---|---|
DE102004054236A1 (en) | 2006-05-18 |
ES2314537T3 (en) | 2009-03-16 |
ATE407256T1 (en) | 2008-09-15 |
DE502005005250D1 (en) | 2008-10-16 |
EP1657356B1 (en) | 2008-09-03 |
CN1773012B (en) | 2012-01-18 |
CN1773012A (en) | 2006-05-17 |
EP1657356A1 (en) | 2006-05-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: VOITH PATENT GMBH, 89522 HEIDENHEIM, DE |
|
8364 | No opposition during term of opposition | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20130601 |