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WO2012052371A1 - Mixture of chemicals - Google Patents

Mixture of chemicals Download PDF

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Publication number
WO2012052371A1
WO2012052371A1 PCT/EP2011/068052 EP2011068052W WO2012052371A1 WO 2012052371 A1 WO2012052371 A1 WO 2012052371A1 EP 2011068052 W EP2011068052 W EP 2011068052W WO 2012052371 A1 WO2012052371 A1 WO 2012052371A1
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WO
WIPO (PCT)
Prior art keywords
turbulence
main stream
fluids
fluid
main
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.)
Ceased
Application number
PCT/EP2011/068052
Other languages
German (de)
French (fr)
Inventor
Susanne Berger
Thomas Jaschinski
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 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 WO2012052371A1 publication Critical patent/WO2012052371A1/en
Anticipated expiration legal-status Critical
Ceased 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
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/022—Means for injecting material into flow within the headbox
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
    • B01F23/451—Mixing liquids with liquids; Emulsifying using flow mixing by injecting one liquid into another
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/27—Mixing by jetting components into a conduit for agitating its contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3132—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit by using two or more injector devices
    • B01F25/31322—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit by using two or more injector devices used simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3133—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit characterised by the specific design of the injector
    • B01F25/31331—Perforated, multi-opening, with a plurality of holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
    • 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

Definitions

  • the invention relates to a method for mixing one or more fluids, of which at least one fluid is at least partially formed by a chemical, in a wholly or partially bounded by a channel wall
  • the object of the invention is therefore to ensure the most comprehensive and gentle mixing of the chemicals in the main stream.
  • the object has been achieved in that the mixing of the fluids with the main flow through one, on the injection at least one
  • Turbulence fluids in the main flow generated turbulence zone of the main flow is supported.
  • the turbulence zone in the main stream provides a comprehensive turbulence of all fluids in this area without stressing the chemicals too much.
  • the fluids can be perpendicular or inclined to the channel wall and / or distributed over the cross section of the main flow in this injected.
  • the turbulence zone is preferably formed by means of at least one turbulence fluid, which is injected perpendicularly or inclined to the channel wall into the main stream.
  • the turbulence in the main flow can be further enhanced by the fact that several turbulence fluids meet in a turbulence zone of the main flow.
  • the turbulence zone can also be located in the main stream in the area of the injection of the fluids, it is in the interest of protecting the turbulence zone
  • Chemicals and intensive mixing advantageous if the injection of the turbulence fluid in the direction of flow of the main flow after the mixing of the fluids into the main flow. Additionally or alternatively, it is advantageous if at least one turbulence fluid is injected into the main flow cross section in the latter, wherein the
  • Flow velocity of the turbulence fluid is greater than that of the main flow. Due to the higher flow velocity of the turbulence fluid, turbulence with the main flow occurs in this case.
  • the turbulence fluid should be at least one lying in the direction of flow of the main stream
  • Flow component are injected into the main stream.
  • the turbulence fluid acts only at a distance from its injection, the injection of the turbulence fluid in the flow direction of the main flow should take place before the mixing of the fluids into the main flow.
  • the main stream of a pulp suspension for producing a paper, cardboard, tissue or other fibrous web or from process, fresh water or similar. is formed.
  • the turbulence fluid is preferably from a pulp suspension, process, fresh water or similar. educated. If the turbulence fluid has a lower consistency than the main stream, then it can be used specifically for dilution and thus additionally support the mixing with the chemicals. As a result, the improved mixing significantly reduces the consumption of process and functional chemicals.
  • FIG. 1 shows a schematic longitudinal section through the main flow
  • Figure 2 a longitudinal section through another main stream 1 and
  • Figure 3 + 4 a transverse and a longitudinal section through another main stream 1.
  • the arrangements shown here are used for admixing a plurality of fluids 2,3 to a main fluid stream 1 of a pulp suspension, which in a tubular channel to a headbox of a machine Production of a fibrous web, in particular a paper web is performed and has a consistency between 0.2 and 2.5%.
  • the pulp suspension consists essentially of pulp and / or
  • Waste paper fibers, water and fillers are Waste paper fibers, water and fillers.
  • the invention is also applicable to upwardly open channels in which the main flow is only partially bounded by a channel wall and accordingly forms a free surface, in particular in white water channels of
  • the fluids 2, 3 to be admixed are in this case formed at least partially by chemicals, in particular retention aids, such as, for example, polyacrylamide, polyvinylamine, polyethylene oxide, fixing agents or even microparticles, for example bentonite or silicate.
  • the chemicals may also be starch Biocide, a dye, a brightener, a sizing agent or similar act. In order to avoid a thermal shock of these chemicals during their injection, it is usually advantageous to match their temperature to the temperature of the main stream 1, ie to heat usually.
  • Turbulence zone 7 ensure a gentle, but intensive mixing.
  • the turbulence fluid 4 of the pulp suspension itself, fresh water or process water, such as white water of the paper machine, a filtrate
  • the turbulence fluid 4 has a lower solids content than the main stream 1, then it can be used specifically for influencing the consistency in the turbulence zone 7, so that the optimum consistency range in the turbulence zone
  • Turbulence zone 7 for the interference of the fluids 2,3 results.
  • All these injections can be made perpendicular to the main stream 1 or inclined in or against the flow direction 6.
  • the following turbulence zone 7 is from formed a plurality of perpendicular to the main flow 1 aligned turbulence fluid streams.
  • the nozzles for supplying the turbulence fluids 4 are arranged distributed regularly over the circumference of the main flow 1 in the channel wall 5, so that the turbulence fluid flows in the main flow 1 intersect.
  • the fluids 2, 3 with the chemicals are likewise injected onto the same circumferential line of the main flow 1 but perpendicularly into the main flow 1. If the fluid jets meet in the main stream 1, this already leads to a
  • a turbulence zone 7 is generated by a turbulence fluid 4, which is injected concentrically in the flow direction 6 of the main flow 1 before the addition of fluid and in the flow direction 6 of the main flow 1 in this.
  • the turbulence fluid 4 has a significantly higher flow velocity than the main flow 1 when it enters the main flow 1.
  • a turbulence zone 7 that reaches up to the injection of the fluids 2, 3 forms.
  • the nozzle openings 8 can, as shown, in the flow direction 6 of the main flow 1 but also be aligned against it.
  • turbulence zone 7 is uniformly distributed by four over a circumferential line of the tubular duct wall 5 of the main flow 1 Nozzles for supplying turbulence fluid streams formed. This is the
  • the distribution of the chemicals in the main stream 1 can be improved by the turbulence zone 7, which increases the effectiveness of the chemicals and thus reduces their demand.
  • the flow rate of the fluids 2, 3 and of the turbulence fluids 4 should be so high that there are no or only slight deposits on the channel wall 5 or the corresponding nozzles. Flow velocities between 0.05 and 20 m / s are usually sufficient for this purpose.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)

Abstract

The invention relates to a method for mixing one or more fluids (2, 3), of which at least one fluid (2, 3) is formed at least in part by a chemical, into a main stream (1) that is delimited by a channel wall (5). In this process, a mixing with the chemical which is as gentle and comprehensive as possible should be achieved in such a manner that the mixture of the fluids (2, 3) with the main stream (1) is supported by a main stream (1) turbulence zone (7) that is generated by injecting at least one turbulence fluid (4) into the main stream (1).

Description

Chemikalieneinmischung  chemical interference

Die Erfindung betrifft ein Verfahren zur Einmischung von einem oder mehreren Fluiden, von denen zumindest ein Fluid wenigstens teilweise von einer Chemikalie gebildet wird, in einen ganz oder teilweise von einer Kanalwand begrenzten The invention relates to a method for mixing one or more fluids, of which at least one fluid is at least partially formed by a chemical, in a wholly or partially bounded by a channel wall

Hauptstrom. Main power.

Bei der Herstellung von Faserstoffsuspensionen zur Herstellung von Papier-, Karton-, Tissue- oder einer anderen Faserstoffbahn kommen zunehmend Chemikalien zum Einsatz, die den Herstellungsprozess und/oder die Qualität der Faserstoffbahn positiv beeinflussen sollen. Dabei handelt es sich meist um Fixier- oder Retentionsmittel. Beim Zuführen eines Fluids in einen Hauptstrom, insbesondere jedoch in eine strömende Faserstoffsuspension stellt sich grundsätzlich das Problem einer möglichst guten Durchmischung. Dabei ist der Grad der Durchmischung auch mit dem In the production of pulp suspensions for the production of paper, board, tissue or another fibrous web increasingly chemicals are used, which should positively influence the manufacturing process and / or the quality of the fibrous web. These are usually fixing or retention agents. When feeding a fluid into a main stream, but in particular into a flowing pulp suspension, there is basically the problem of the best possible thorough mixing. Here is the degree of mixing with the

Chemikalienbedarf verbunden. Associated with chemicals.

Um den Chemikalienbedarf zu minimieren gibt es bereits seit längerer Zeit To minimize the need for chemicals has been around for some time

Bestrebungen die Durchmischung zu verbessern, was jedoch bisher noch nicht ausreichend befriedigen kann. Efforts to improve the mixing, but so far can not satisfy enough.

Problematisch sind dabei insbesondere auch Ablagerungen an der Kanalwand. In particular, deposits on the channel wall are also problematic.

Die Aufgabe der Erfindung ist es daher eine möglichst umfassende und schonende Einmischung der Chemikalien in den Hauptstrom zu gewährleisten. Erfindungsgemäß wurde die Aufgabe dadurch gelöst, dass die Vermischung der Fluide mit dem Hauptstrom durch eine, über die Eindüsung mindestens eines The object of the invention is therefore to ensure the most comprehensive and gentle mixing of the chemicals in the main stream. According to the invention, the object has been achieved in that the mixing of the fluids with the main flow through one, on the injection at least one

Turbulenz-Fluids in den Hauptstrom erzeugte Turbulenzzone des Hauptstroms unterstützt wird. Turbulence fluids in the main flow generated turbulence zone of the main flow is supported.

Die Turbulenzzone im Hauptstrom sorgt für eine umfassende Verwirbelung aller Fluide in diesem Bereich ohne dabei die Chemikalien zu stark zu beanspruchen. Mit Vorteil können die Fluide senkrecht oder zur Kanalwand geneigt und/oder über den Querschnitt des Hauptstroms verteilt in diesen eingedüst werden. The turbulence zone in the main stream provides a comprehensive turbulence of all fluids in this area without stressing the chemicals too much. Advantageously, the fluids can be perpendicular or inclined to the channel wall and / or distributed over the cross section of the main flow in this injected.

Dabei wird die Turbulenzzone vorzugsweise mittels wenigstens eines Turbulenz- Fluids gebildet, welches senkrecht oder zur Kanalwand geneigt in den Hauptstrom eingedüst wird. Die Verwirbelung im Hauptstrom kann noch dadurch verstärkt werden, dass mehrere Turbulenz-Fluide in einer Turbulenzzone des Hauptstroms aufeinandertreffen. In this case, the turbulence zone is preferably formed by means of at least one turbulence fluid, which is injected perpendicularly or inclined to the channel wall into the main stream. The turbulence in the main flow can be further enhanced by the fact that several turbulence fluids meet in a turbulence zone of the main flow.

Zwar kann sich hierbei die Turbulenzzone auch im Bereich der Eindüsung der Fluide in den Hauptstrom befinden, allerdings ist es im Interesse einer Schonung der Although the turbulence zone can also be located in the main stream in the area of the injection of the fluids, it is in the interest of protecting the

Chemikalien und einer intensiven Vermischung vorteilhaft, wenn die Eindüsung des Turbulenz-Fluids in Strömungsrichtung des Hauptstroms nach der Einmischung der Fluide in den Hauptstrom erfolgt. Ergänzend oder alternativ ist es von Vorteil, wenn wenigstens ein Turbulenz-Fluid innerhalb des Hauptstromquerschnitts in diesen eingedüst wird, wobei die Chemicals and intensive mixing advantageous if the injection of the turbulence fluid in the direction of flow of the main flow after the mixing of the fluids into the main flow. Additionally or alternatively, it is advantageous if at least one turbulence fluid is injected into the main flow cross section in the latter, wherein the

Strömungsgeschwindigkeit des Turbulenz-Fluids größer als die des Hauptstroms ist. Durch die höhere Strömungsgeschwindigkeit des Turbulenz-Fluids kommt es hierbei zu einer Verwirbelung mit dem Hauptstrom. Dabei sollte das Turbulenz-Fluid wenigstens mit einer in Strömungsrichtung des Hauptstroms liegenden Flow velocity of the turbulence fluid is greater than that of the main flow. Due to the higher flow velocity of the turbulence fluid, turbulence with the main flow occurs in this case. In this case, the turbulence fluid should be at least one lying in the direction of flow of the main stream

Strömungskomponente in den Hauptstrom eingedüst werden. Flow component are injected into the main stream.

Da hierbei das Turbulenzfluid erst mit Abstand zu dessen Eindüsung verstärkt wirkt, sollte die Eindüsung des Turbulenz-Fluids in Strömungsrichtung des Hauptstroms vor der Einmischung der Fluide in den Hauptstrom erfolgen. Since in this case the turbulence fluid acts only at a distance from its injection, the injection of the turbulence fluid in the flow direction of the main flow should take place before the mixing of the fluids into the main flow.

In Abhängigkeit von den Prozessbedingungen und -erfordernissen kann es von Vorteil sein, wenn der Hauptstrom von einer Faserstoffsuspension zur Herstellung einer Papier-, Karton-, Tissue- oder einer anderen Faserstoffbahn oder aber von Prozess-, Frischwasser o.ä. gebildet wird. Depending on the process conditions and requirements, it may be advantageous if the main stream of a pulp suspension for producing a paper, cardboard, tissue or other fibrous web or from process, fresh water or similar. is formed.

Das Turbulenz-Fluid wird vorzugsweise von einer Faserstoffsuspension, Prozess-, Frischwasser o.ä. gebildet. Falls das Turbulenz-Fluid eine geringere Konsistenz als der Hauptstrom aufweist, so kann es gezielt zur Verdünnung zum Einsatz kommen und so die Vermischung mit den Chemikalien zusätzlich unterstützen. Im Ergebnis kann durch die verbesserte Vermischung der Verbrauch von Prozess- und Funktionschemikalien erheblich reduziert werden. The turbulence fluid is preferably from a pulp suspension, process, fresh water or similar. educated. If the turbulence fluid has a lower consistency than the main stream, then it can be used specifically for dilution and thus additionally support the mixing with the chemicals. As a result, the improved mixing significantly reduces the consumption of process and functional chemicals.

Nachfolgend soll die Erfindung an mehreren Ausführungsbeispielen näher erläutert werden. In der beigefügten Zeichnung zeigt: The invention will be explained in more detail below with reference to several exemplary embodiments. In the attached drawing shows:

Figur 1: einen schematischen Längsschnitt durch den Hauptstrom 1, FIG. 1 shows a schematic longitudinal section through the main flow 1,

Figur 2: einen Längsschnitt durch einen anderen Hauptstrom 1 und Figure 2: a longitudinal section through another main stream 1 and

Figur 3+4: einen Quer- sowie einen Längsschnitt durch einen weiteren Hauptstrom 1. Die hier dargestellten Anordnungen dienen zur Beimischung von mehreren Fluiden 2,3 zu einem fluiden Hauptstrom 1 aus einer Faserstoffsuspension, welcher in einem rohrförmigen Kanal zu einem Stoffauflauf einer Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Papierbahn geführt wird und eine Stoffdichte zwischen 0,2 und 2,5 % aufweist. Figure 3 + 4: a transverse and a longitudinal section through another main stream 1. The arrangements shown here are used for admixing a plurality of fluids 2,3 to a main fluid stream 1 of a pulp suspension, which in a tubular channel to a headbox of a machine Production of a fibrous web, in particular a paper web is performed and has a consistency between 0.2 and 2.5%.

Die Faserstoffsuspension besteht im Wesentlichen aus Zellstoff und/oder The pulp suspension consists essentially of pulp and / or

Altpapierfasern, Wasser und Füllstoffen. Waste paper fibers, water and fillers.

Anwendbar ist die Erfindung aber auch bei nach oben offenen Kanälen in denen der Hauptstrom nur teilweise von einer Kanalwand begrenzt wird und dementsprechend eine freie Oberfläche ausbildet, insbesondere bei Siebwasserkanälen von  However, the invention is also applicable to upwardly open channels in which the main flow is only partially bounded by a channel wall and accordingly forms a free surface, in particular in white water channels of

Papiermaschinen. Paper machines.

Die einzumischenden Fluide 2,3 werden hierbei zumindest teilweise von Chemikalien, insbesondere Retentionsmitteln, wie beispielsweise Polyacrylamid, Polyvinylamin, Polyethylenoxid, Fixiermitteln oder aber auch von Mikropartikeln, wie z.B. Bentonit oder Silikat gebildet. Ferner kann es sich bei den Chemikalien auch um Stärke, ein Biozid, einen Farbstoff, einen Aufheller, ein Leimungsmittel o.ä. handeln. Um einen thermischen Schock dieser Chemikalien bei ihrer Eindüsung zu vermeiden, ist es meist von Vorteil, deren Temperatur an die Temperatur des Hauptstroms 1 anzugleichen, d.h. in der Regel zu erwärmen. The fluids 2, 3 to be admixed are in this case formed at least partially by chemicals, in particular retention aids, such as, for example, polyacrylamide, polyvinylamine, polyethylene oxide, fixing agents or even microparticles, for example bentonite or silicate. Furthermore, the chemicals may also be starch Biocide, a dye, a brightener, a sizing agent or similar act. In order to avoid a thermal shock of these chemicals during their injection, it is usually advantageous to match their temperature to the temperature of the main stream 1, ie to heat usually.

Zur Verstärkung der Durchmischung der beigefügten Fluide 2,3 mit dem Hauptstrom werden Turbulenz-Fluide 4 in den Hauptstrom 1 eingedüst, die im Hauptstrom 1 ein oder mehrere Turbulenzzonen 7 bilden sollen. Die Verwirbelungen in der To enhance the mixing of the accompanying fluids 2,3 with the main flow turbulence fluids 4 are injected into the main stream 1, which should form one or more turbulence zones 7 in the main stream 1. The turbulences in the

Turbulenzzone 7 sorgen für eine schonende, aber intensive Vermischung. Turbulence zone 7 ensure a gentle, but intensive mixing.

Hierzu kann das Turbulenz-Fluid 4 von der Faserstoffsuspension selbst, Frischwasser oder Prozesswasser, wie Siebwasser der Papiermaschine, Filtrat eines For this purpose, the turbulence fluid 4 of the pulp suspension itself, fresh water or process water, such as white water of the paper machine, a filtrate

Scheibenfilters zur Eindickung, Klarwasser aus einer Flotationsanlage oder Disc filters for thickening, clear water from a flotation plant or

Rückwasser einer Wasseraufbereitungsanlage gebildet werden. Be formed backwater of a water treatment plant.

Wenn das Turbulenz-Fluid 4 einen geringeren Feststoffanteil als der Hauptstrom 1 aufweist, so kann es gezielt zur Beeinflussung der Konsistenz in der Turbulenzzone 7 eingesetzt werden, so dass sich der optimale Konsistenzbereich in der If the turbulence fluid 4 has a lower solids content than the main stream 1, then it can be used specifically for influencing the consistency in the turbulence zone 7, so that the optimum consistency range in the turbulence zone

Turbulenzzone 7 für die Einmischung der Fluide 2,3 ergibt. Turbulence zone 7 for the interference of the fluids 2,3 results.

Bei der Ausführung gemäß Figur 1 erfolgt erst die Eindüsung der Fluide 2,3 etwa auf der gleichen Umfangslinie des Hauptstroms 1 in diesen und danach in In the embodiment according to FIG. 1, only the injection of the fluids 2, 3 takes place approximately on the same circumferential line of the main flow 1 in these and then in FIG

Strömungsrichtung 6 des Hauptstroms 1 folgend die Eindüsung des Turbulenzfluids 4. Flow direction 6 of the main stream 1 following the injection of the turbulence fluid. 4

All diese Eindüsungen können senkrecht zum Hauptstrom 1 oder aber in oder entgegen der Strömungsrichtung 6 geneigt erfolgen. All these injections can be made perpendicular to the main stream 1 or inclined in or against the flow direction 6.

Zur Schonung der Chemikalien hat bei Figur 1 die Strömungsrichtung der Fluide 2,3 während der Eindüsung in den Hauptstrom 1 eine Richtungskomponente in To protect the chemicals in Figure 1, the flow direction of the fluids 2,3 during injection into the main stream 1, a directional component in

Strömungsrichtung 6 des Hauptstroms 1 . Die folgende Turbulenzzone 7 wird von mehreren senkrecht zum Hauptstrom 1 ausgerichteten Turbulenz-Fluidströmen gebildet. Hierzu sind die Düsen zur Zuführung der Turbulenzfluide 4 regelmäßig über den Umfang des Hauptstroms 1 in der Kanalwand 5 verteilt angeordnet, so dass sich die Turbulenzfluidströme im Hauptstrom 1 kreuzen. Flow direction 6 of the main stream. 1 The following turbulence zone 7 is from formed a plurality of perpendicular to the main flow 1 aligned turbulence fluid streams. For this purpose, the nozzles for supplying the turbulence fluids 4 are arranged distributed regularly over the circumference of the main flow 1 in the channel wall 5, so that the turbulence fluid flows in the main flow 1 intersect.

Bei Figur 2 werden die Fluide 2,3 mit den Chemikalien ebenfalls auf der gleichen Umfangslinie des Hauptstroms 1 aber senkrecht in den Hauptstrom 1 eingedüst. Falls sich die Fluidstrahlen im Hauptstrom 1 treffen, so führt bereits dies zu einer In FIG. 2, the fluids 2, 3 with the chemicals are likewise injected onto the same circumferential line of the main flow 1 but perpendicularly into the main flow 1. If the fluid jets meet in the main stream 1, this already leads to a

Verwirbelung. Turbulence.

Zusätzlich wird jedoch eine Turbulenzzone 7 von einem Turbulenzfluid 4 erzeugt, welches in Strömungsrichtung 6 des Hauptstroms 1 vor der Fluidzugabe konzentrisch und in Strömungsrichtung 6 des Hauptstroms 1 in diesen eingedüst wird. In addition, however, a turbulence zone 7 is generated by a turbulence fluid 4, which is injected concentrically in the flow direction 6 of the main flow 1 before the addition of fluid and in the flow direction 6 of the main flow 1 in this.

Dabei hat das Turbulenz-Fluid 4 beim Eintritt in den Hauptstrom 1 eine wesentlich höhere Strömungsgeschwindigkeit als der Hauptstrom 1 . Im Ergebnis bildet sich nach der Eindüsung des Turbulenz-Fluids 4 eine bis zur Eindüsung der Fluide 2,3 reichende Turbulenzzone 7. In this case, the turbulence fluid 4 has a significantly higher flow velocity than the main flow 1 when it enters the main flow 1. As a result, after the injection of the turbulence fluid 4, a turbulence zone 7 that reaches up to the injection of the fluids 2, 3 forms.

Konstruktiv von Vorteil ist dabei die Einführung der Düse des Turbulenz-Fluids 4 im Bereich einer annähernd rechtwinkligen Krümmung des Hauptstroms 1 . Im Unterschied hierzu erfolgt die Zugabe der Fluide 2,3 bei der in Figur 3  A design advantage of the introduction of the nozzle of the turbulence fluid 4 in the region of an approximately rectangular curvature of the main stream. 1 In contrast to this, the addition of the fluids 2,3 takes place in the case of FIG. 3

dargestellten Ausführung an mehreren verteilt über den Querschnitt des Hauptstroms 1 angeordneten Stellen. Hierfür eignen sich insbesondere in den Hauptstrom 1 senkrecht zu dessen Strömungsrichtung 6 eingeführte Rohre mit einer Vielzahl von Düsenöffnungen 8. illustrated embodiment of a plurality of distributed over the cross section of the main stream 1 arranged locations. For this purpose, in particular in the main stream 1 perpendicular to its flow direction 6 inserted tubes with a plurality of nozzle openings eighth

Die Düsenöffnungen 8 können dabei, wie dargestellt, in Strömungsrichtung 6 des Hauptstroms 1 aber auch entgegen dieser ausgerichtet sein. The nozzle openings 8 can, as shown, in the flow direction 6 of the main flow 1 but also be aligned against it.

In Strömungsrichtung 6 folgend schließt sich an die Einmischung der Fluide 2,3 die Bildung einer Turbulenzzone 7 an. Diese Turbulenzzone 7 wird von vier über eine Umfangslinie der rohrförmigen Kanalwand 5 des Hauptstroms 1 gleichmäßig verteilte Düsen zur Zuführung von Turbulenz-Fluidströmen gebildet. Dabei wird das Following in the flow direction 6, the mixing of the fluids 2, 3 is followed by the formation of a turbulence zone 7. This turbulence zone 7 is uniformly distributed by four over a circumferential line of the tubular duct wall 5 of the main flow 1 Nozzles for supplying turbulence fluid streams formed. This is the

Turbulenz-Fluid 4 entgegen der Strömungsrichtung 6 des Hauptstroms 1 geneigt in diesen eingedüst, wobei sich die Turbulenz-Fluidströme in der Mitte des Hauptstroms 1 treffen. Turbulence fluid 4 against the flow direction 6 of the main flow 1 inclined injected into this, wherein the turbulence fluid flows meet in the middle of the main flow 1.

In allen Fällen kann durch die Turbulenzzone 7 die Verteilung der Chemikalien im Hauptstrom 1 verbessert werden, was die Wirksamkeit der Chemikalien steigert und damit deren Bedarf vermindert. Die Strömungsgeschwindigkeit der Fluide 2,3 sowie der Turbulenz-Fluide 4 sollte so hoch sein, dass es keine oder nur geringe Ablagerungen an der Kanalwand 5 bzw. den entsprechenden Düsen gibt. Hierzu genügen meist Strömungsgeschwindigkeiten zwischen 0,05 und 20 m/s. In all cases, the distribution of the chemicals in the main stream 1 can be improved by the turbulence zone 7, which increases the effectiveness of the chemicals and thus reduces their demand. The flow rate of the fluids 2, 3 and of the turbulence fluids 4 should be so high that there are no or only slight deposits on the channel wall 5 or the corresponding nozzles. Flow velocities between 0.05 and 20 m / s are usually sufficient for this purpose.

Claims

Patentansprüche 1 . Verfahren zur Einmischung von einem oder mehreren Fluiden (2,3), von denen zumindest ein Fluid (2,3) wenigstens teilweise von einer Chemikalie gebildet wird, in einen von einer Kanalwand (5) ganz oder teilweise begrenzten Hauptstrom (1 ), dadurch gekennzeichnet, dass die Vermischung der Fluide (2,3) mit dem Claims 1. Method for mixing one or more fluids (2, 3), of which at least one fluid (2, 3) is at least partially constituted by a chemical, into a main flow (1) wholly or partly delimited by a channel wall (5) characterized in that the mixing of the fluids (2,3) with the Hauptstrom (1 ) durch eine, über die Eindüsung mindestens eines Turbulenz-Fluids (4) in den Hauptstrom (1 ) erzeugte Turbulenzzone (7) des Hauptstroms (1 ) unterstützt wird.  Mainstream (1) by a, via the injection of at least one turbulence fluid (4) into the main stream (1) generated turbulence zone (7) of the main stream (1) is supported. 2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Fluide (2,3) senkrecht oder zur Kanalwand (5) geneigt in den Hauptstrom (1 ) eingedüst werden. 2. The method according to claim 1, characterized in that the fluids (2,3) are injected perpendicular or inclined to the channel wall (5) in the main stream (1). 3. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Fluide (2,3) über den Querschnitt des Hauptstroms (1 ) verteilt in diesen eingedüst werden. 3. The method according to claim 1, characterized in that the fluids (2,3) distributed over the cross section of the main stream (1) are injected into this. 4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass wenigstens ein Turbulenz-Fluid (4) senkrecht oder zur Kanalwand (5) geneigt in den Hauptstrom (1 ) eingedüst wird. 4. The method according to any one of the preceding claims, characterized in that at least one turbulence fluid (4) is injected perpendicular or inclined to the channel wall (5) in the main stream (1). 5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass mehrere Turbulenz- Fluide (4) in einer Turbulenzzone (7) des Hauptstroms (1 ) aufeinandertreffen. 5. The method according to claim 4, characterized in that a plurality of turbulence fluids (4) in a turbulence zone (7) of the main flow (1) meet. 6. Verfahren nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die 6. The method according to claim 4 or 5, characterized in that the Eindüsung des Turbulenz-Fluids (4) in Strömungsrichtung (6) des Hauptstroms(l ) nach der Einmischung der Fluide (2,3) in den Hauptstrom (1 ) erfolgt. Injection of the turbulence fluid (4) in the flow direction (6) of the main flow (L) after the mixing of the fluids (2,3) into the main flow (1). 7. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass wenigstens ein Turbulenz-Fluid (4) innerhalb des Hauptstroms (1 ) in diesen eingedüst wird, wobei die Strömungsgeschwindigkeit des Turbulenz-Fluids (4) größer als die des Hauptstroms (1 ) ist. 7. The method according to any one of the preceding claims, characterized in that at least one turbulence fluid (4) within the main stream (1) is injected into this, wherein the flow velocity of the turbulence fluid (4) greater than that of the main stream (1) is. 8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass die Eindüsung des Turbulenz-Fluids (4) in Strömungsrichtung (6) des Hauptstroms (1 ) vor der 8. The method according to claim 7, characterized in that the injection of the turbulence fluid (4) in the flow direction (6) of the main stream (1) before the Einmischung der Fluide (2,3) in den Hauptstrom (1 ) erfolgt.  Mixing of the fluids (2,3) in the main stream (1) takes place. 9. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Hauptstrom (1 ) von einer Faserstoffsuspension zur Herstellung einer Papier-, Karton-, Tissue- oder einer anderen Faserstoffbahn gebildet wird. 9. The method according to any one of the preceding claims, characterized in that the main stream (1) is formed by a pulp suspension for producing a paper, cardboard, tissue or another fibrous web. 10.Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Hauptstrom (1 ) von Prozess-, Frischwasser o.ä. gebildet wird. 10.Verfahren according to any one of claims 1 to 8, characterized in that the main stream (1) of process, fresh water o. is formed. 1 1 .Verfahren nach einem der vorhergehenden Ansprüche, dadurch 1 1 .Verfahren according to any one of the preceding claims, characterized gekennzeichnet, dass das Turbulenz-Fluid (4) von einer Faserstoffsuspension, Prozess-, Frischwasser o.ä. gebildet wird.  characterized in that the turbulence fluid (4) from a pulp suspension, process, fresh water or similar. is formed.
PCT/EP2011/068052 2010-10-19 2011-10-17 Mixture of chemicals Ceased WO2012052371A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107715719A (en) * 2017-09-11 2018-02-23 天津科技大学 A kind of nozzle of achievable jet pumping system tail pipe secondary jet charging

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120936477A (en) * 2023-04-06 2025-11-11 陶氏环球技术有限责任公司 Method for mixing fluid melt flow streams
KR20250174637A (en) * 2023-04-06 2025-12-12 다우 글로벌 테크놀로지스 엘엘씨 Process for mixing fluid melt flow streams

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1471841A (en) * 1974-01-31 1977-04-27 Ruhrkohle Ag Device for mixing pneumatically conveyed material with a fluid
EP1203888A1 (en) * 1997-03-24 2002-05-08 Naukovo-virobnicha firma TECHMASH, Ltd. Device for influencing the flow of a fluid medium
WO2004007062A2 (en) * 2002-07-11 2004-01-22 1 1 Prototyping Herbak Gmbh Device for mixing liquids

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1471841A (en) * 1974-01-31 1977-04-27 Ruhrkohle Ag Device for mixing pneumatically conveyed material with a fluid
EP1203888A1 (en) * 1997-03-24 2002-05-08 Naukovo-virobnicha firma TECHMASH, Ltd. Device for influencing the flow of a fluid medium
WO2004007062A2 (en) * 2002-07-11 2004-01-22 1 1 Prototyping Herbak Gmbh Device for mixing liquids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107715719A (en) * 2017-09-11 2018-02-23 天津科技大学 A kind of nozzle of achievable jet pumping system tail pipe secondary jet charging

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