EP1347092A1 - Method and apparatus for mixing fluids into fluid media - Google Patents

Method and apparatus for mixing fluids into fluid media Download PDF

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Publication number
EP1347092A1
EP1347092A1 EP03005018A EP03005018A EP1347092A1 EP 1347092 A1 EP1347092 A1 EP 1347092A1 EP 03005018 A EP03005018 A EP 03005018A EP 03005018 A EP03005018 A EP 03005018A EP 1347092 A1 EP1347092 A1 EP 1347092A1
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EP
European Patent Office
Prior art keywords
fluid
mixed
medium
steam
rotor
Prior art date
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Granted
Application number
EP03005018A
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German (de)
French (fr)
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EP1347092B1 (en
Inventor
Max Dipl. Ing. Grengg
Peter Dipl.Ing.Dr. Scheucher
Johann Ing. Strasser
Kaj Henricson
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Andritz AG
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Andritz AG
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    • 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
    • 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
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • 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
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B01F23/23311—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer axis
    • 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
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B01F23/23314—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer element
    • 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
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2336—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer
    • B01F23/23364—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer the gas being introduced between the stirrer elements
    • 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
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
    • B01F23/2376—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media characterised by the gas being introduced
    • B01F23/23767—Introducing steam or damp in liquids
    • 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
    • B01F23/43—Mixing liquids with liquids; Emulsifying using driven stirrers
    • 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
    • B01F25/3131—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/50—Pipe mixers, i.e. mixers wherein the materials to be mixed flow continuously through pipes, e.g. column mixers

Definitions

  • the invention relates to a method for mixing fluids into flowable ones Media, for example fiber suspensions. Furthermore, it affects a device for performing the method.
  • the aim of the invention is therefore an even distribution of flowing in To create media to be mixed with fluids.
  • the invention is therefore characterized in that the to be mixed Fluid with a high relative speed to the flowing medium in this medium e.g. Fibrous suspension, is mixed.
  • the to be mixed Fluid with a high relative speed to the flowing medium in this medium e.g. Fibrous suspension
  • the fluid at high relative speed to the flowing Medium can be a largely uniform distribution of the fluid in the flowing medium can be achieved. This also prevents local overheating (with steam supply) or damage e.g. the fibers practically avoided.
  • An advantageous development of the invention is characterized in that that in the flowing medium, for example fiber suspension, steam mixed in and thus the medium, in particular fiber suspension a higher temperature, for example up to 180 ° C, is heated.
  • a higher temperature for example up to 180 ° C
  • the steam is already condensed in the medium before entering the container so that a complete Heating is guaranteed.
  • reaction gas e.g. Oxygen, ozone or chlorine
  • the flowing medium for example fiber suspension, a liquid and / or chemicals, e.g. Water, Peroxide, alkalis, acids, additives or auxiliary substances can be mixed in.
  • a liquid and / or chemicals e.g. Water, Peroxide, alkalis, acids, additives or auxiliary substances
  • a particularly favorable variant is that the mixed fluids be promoted at the same time.
  • the invention also relates to a device for mixing fluids in flowable media, for example fiber suspensions.
  • a device for mixing fluids in flowable media for example fiber suspensions.
  • This is characterized in that a rotor that has a high Relative speed between the fluid to be added and the generated flowing medium is provided.
  • the fluid to be added will thereby very finely distributed in the medium, for example fiber suspension.
  • Nozzles arranged so that the fluids to be mixed can optimal place.
  • the rotor has a hollow shaft Has supply of the fluids. This allows the fluid to be mixed in directly introduced into the flowing medium and distributed evenly become.
  • a particularly favorable distribution can be achieved if the Hollow shaft at least one distribution star is attached. This enables one particularly good distribution of the fluid to be mixed.
  • Another way to generate a high relative speed between flowing medium and fluid to be added is that a rotor provided with paddles the flowing medium with large Speed is conveyed past the feed nozzles, through which the to be added Fluid is fed.
  • the invention also relates to a system for mixing fluids in flowable media, in particular fiber suspensions. It is advantageous if the device is in a pipeline, in particular a deflection a pipeline.
  • the device can be in a container or directly in front of one Reaction container can be arranged.
  • FIG. 1 shows a device according to the prior art
  • FIG. 2 shows a device 3 shows a further variant of the invention
  • 4 to 6 different arrangements of the invention
  • Fig. 7 an example represent a rotor according to the invention.
  • Fig. 1 shows a system according to the prior art.
  • a Pump 2 a pulp or pulp suspension from a container 1 pumped out, the container 1 e.g. a standpipe of a washer or Storage tanks can be.
  • the pipeline 4 is in addition to the pump 2 a steam feed 6, consisting of several steam valves around the circumference of the lines are provided.
  • a booster pump 8 the suspension in one Treatment container 9 introduced.
  • the suspension must be in the place of Steam supply have a lower pressure than the steam supplied, which is mostly low pressure steam.
  • Fig. 2 shows a device 10 according to the invention, whereby through a line 11 the flowable medium, for example a fiber suspension, fed and via a line 12, the medium mixed with a fluid is discharged again.
  • the device 10 has a rotating Hollow shaft 13 through which a fluid 14, such as. B. steam, a gas or a Liquid is supplied.
  • a fluid 14 such as. B. steam, a gas or a Liquid is supplied.
  • a fluid 14 such as. B. steam, a gas or a Liquid
  • FIG. 3 Another variant of the invention is shown in FIG. 3.
  • the device 10 here has a rotating shaft 17 with rotor blades 18. Furthermore, special distribution devices 19 can also be arranged.
  • the fluid to be mixed is correspondingly arranged nozzles 20 introduced, also at the different Positions different fluids can be introduced. So could e.g. at the addition point 20 'closest to the feed pipe 11 Steam can be fed for heating. This vapor condenses quickly so that at the next position 20 "there is already a reaction gas such as ozone or a liquid reactant such as e.g. Peroxide, evenly can be mixed in.
  • a reaction gas such as ozone
  • a liquid reactant such as e.g. Peroxide
  • FIG. 4 corresponds approximately to FIG. 2, with device 10 in one Pipe elbow 21 is arranged. By redirecting the flow the mixing is further improved and friction losses are reduced.
  • FIG. 5 shows a device 10 according to the invention, which in a container 22 is arranged.
  • the rotor 23 sits here on a hollow shaft 13 through which a corresponding fluid such as e.g. Steam, gas or one Liquid is mixed in evenly.
  • a corresponding fluid such as e.g. Steam, gas or one Liquid is mixed in evenly.
  • a so-called Cloth chest in the paper industry is generated by the rotor 23 Turbulence circulates all of the liquid in the container and thus one uniform interference guaranteed.
  • the medium for example fiber suspension
  • the medium for example fiber suspension
  • the fluid e.g. Steam, gas or a liquid reactant is through the hollow shaft 13 of the rotor, which is equipped with at least one distribution star, directly into the flowing one Medium fed in at a high relative speed and there evenly distributed.
  • FIG. 7 shows an example of a rotor according to the invention. Here, you can well recognize the outlet openings 16 for the fluid to be mixed.
  • a preferred application of the invention is the mixing in of Steam and / or chemicals in the field of pulp delignification and -bleaching.
  • Generally here are in a wood chips cooking liquor suspension or in a pulp suspension with a fiber content of 0.1 to 20% steam to heat the suspension and / or chemicals mixed in for delignification and / or bleaching.
  • gases such as oxygen, ozone, chlorine, chlorine dioxide, sulfur dioxide, or Liquids such as white liquor or peroxide can be used.
  • temperature is an important criterion for the reaction. So it will using steam the initial temperature of the pulp suspension from between 10 and 100 ° C brought to a higher temperature up to about 180 ° C.
  • the feed positions can be in the already heated suspension (setting the required / desired reaction temperature) evenly Desired reaction gas or the liquid reaction chemical to be mixed in. Acids and alkalis can also be beneficial for pH Setting can be mixed in.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

In a process to admix a fluid into a fibrous suspension of e.g. cellulose, the fluid is esp. admixed at high relative speed and at a higher temperature of e.g. 180degreesC. The admixed fluid is e.g. steam which heats the medium to e.g. 180degreesC. In a further embodiment, the admixed fluid is a reactive gas e.g. oxygen, ozone or chlorine. In a further alternative embodiment, the admixed fluid is e.g. water, peroxide, caustic solution, acid, additives, catalysts or other additive agents. The steam, gas or liquid may be admixed at high speed by themselves or in conjunction with each other. Also claimed is a commensurate assembly with e.g. a rotor (10) located between the incoming fluid and the fibrous suspension. A jet (16) distribution (15) array is located in the zone where high relative speeds pertain. The rotor has a hollow shaft (13) feeding the jets (16) with the incoming fluid. The rotor (10) assembly is located within a pipe bend or tank immediately prior to a reactor vessel.

Description

Die Erfindung betrifft ein Verfahren zum Einmischen von Fluiden in fließfähige Medien, beispielsweise Faserstoffsuspensionen. Weiters betrifft sie eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for mixing fluids into flowable ones Media, for example fiber suspensions. Furthermore, it affects a device for performing the method.

Bei verschiedensten Prozessen ist es erforderlich Dampf, Reaktionsgase, Wasser oder Chemikalien alleine oder gemeinsam in fließende Medien einzumischen. Speziell im Bereich der Papier- und Zellstoffindustrie wird zur Aufwärmung von Wasser (Filtraten) und Suspensionen meist Dampf verwendet. Dies erfolgt heute meist in einer Rohrleitung, die zu einem Reaktionsbehälter führt. Weiters sind verschiedenste Chemikalien in gasförmiger und/oder in flüssiger Form in fließende Medien einzumischen. Sollen Flüssigkeiten eingemischt werden, so gibt es die Möglichkeit von statischen Mischern, d.h. die einzumischende Flüssigkeit wird in die Rohrleitung eingebracht, z.B. eingedüst, und dann gemeinsam mit der Flüssigkeit, z.B. Faserstoffsuspension, durch eine Einrichtung gefördert, in der die beiden Medienströme durch vielfache Umlenkungen vermischt werden. Sollen Gase oder Dampf eingemischt werden, erfolgt dies oft durch am Rohrumfang angeordnete Düsen, so dass eine Aufteilung der zu dosierenden Gesamtmenge auf mehrere (viele) Dosierstellen erfolgt Der Nachteil all dieser Verfahren bzw. Anordnungen besteht darin, dass eine Reaktion, speziell bei sehr reaktiven Chemikalien und bei Dampf, bereits örtlich an den Dosierstellen erfolgt, wodurch Ungleichmäßigkeiten in der Verteilung auftreten können. Wird Dampf zur Aufheizung von Medien verwendet, sind örtliche Überhitzungen an den Dosierstellen zu verzeichnen, was z.B. bei Faserstoffsuspensionen zu Schäden an den Fasern führen würde.Various processes require steam, reaction gases, Water or chemicals alone or together in flowing media interfere. Especially in the paper and pulp industry Warming up water (filtrates) and suspensions mostly steam used. Today, this is usually done in a pipeline that leads to one Reaction vessel leads. Furthermore, various chemicals are in gaseous form and / or to mix in liquid form in flowing media. If liquids are to be mixed in, there is the possibility of static mixers, i.e. the liquid to be mixed is in the Pipeline introduced, e.g. injected, and then together with the Liquid, e.g. Fibrous suspension, sponsored by an institution, in which mixes the two media flows through multiple redirections become. If gases or steam are to be mixed in, this is often done by nozzles arranged on the circumference of the pipe, so that a division of the Total dosing takes place on several (many) dosing points The disadvantage of all of these methods and arrangements is that a Reaction, especially with very reactive chemicals and with steam, already takes place locally at the dosing points, which causes irregularities in the Distribution can occur. If steam is used to heat media, there is local overheating at the dosing points, what e.g. cause damage to the fibers in fiber suspensions would.

Ziel der Erfindung ist es daher eine gleichmäßige Verteilung von in fließende Medien einzumischenden Fluiden zu schaffen.The aim of the invention is therefore an even distribution of flowing in To create media to be mixed with fluids.

Die Erfindung ist daher dadurch gekennzeichnet, dass das einzumischende Fluid mit einer hohen Relativgeschwindigkeit zum fließenden Medium in dieses Medium z.B. Faserstoffsuspension, eingemischt wird. Durch das Einmischen des Fluids mit hoher Relativgeschwindigkeit zum fließenden Medium kann eine weitestgehend gleichmäßige Verteilung des Fluids im fließenden Medium erzielt werden. Damit werden auch lokale Überhitzungen (bei Dampfzufuhr) bzw. Schädigungen z.B. der Fasern praktisch vermieden.The invention is therefore characterized in that the to be mixed Fluid with a high relative speed to the flowing medium in this medium e.g. Fibrous suspension, is mixed. By the Mixing the fluid at high relative speed to the flowing Medium can be a largely uniform distribution of the fluid in the flowing medium can be achieved. This also prevents local overheating (with steam supply) or damage e.g. the fibers practically avoided.

Beim Einmischen von Chemikalien kann so eine gleichmäßige Verteilung und somit gleichmäßige Wirkung erreicht werden.When mixing in chemicals this can result in an even distribution and thus uniform effect can be achieved.

Eine vorteilhafte Weiterbildung der Erfindung ist dadurch gekennzeichnet, dass in das fließende Medium, beispielsweise Faserstoffsuspension, Dampf eingemischt und somit das Medium, insbesondere Faserstoffsuspension auf eine höhere Temperatur, beispielsweise bis zu 180 °C, erwärmt wird. Durch die Einmischung von Dampf kurz vor einem Behälter kann das Medium, beispielsweise Faserstoffsuspension, bereits gleichmäßig aufgewärmt zugeführt werden. Bei geeigneter Wahl der Zugabeart ist der Dampf bereits vor Eintritt in den Behälter im Medium kondensiert, so dass eine vollständige Erwärmung gewährleistet wird.An advantageous development of the invention is characterized in that that in the flowing medium, for example fiber suspension, steam mixed in and thus the medium, in particular fiber suspension a higher temperature, for example up to 180 ° C, is heated. By mixing in steam just before a container can damage the medium, for example fiber suspension, already warmed up evenly are fed. With a suitable choice of the type of addition, the steam is already condensed in the medium before entering the container so that a complete Heating is guaranteed.

Wird in das Medium, beispielsweise Faserstoffsuspension, ein Gas, vorzugsweise Reaktionsgas, wie z.B. Sauerstoff, Ozon oder Chlor, eingemischt, so ergibt sich eine besonders gleichmäßige Reaktion mit dem Medium.If a gas is introduced into the medium, e.g. fiber suspension, preferably reaction gas, e.g. Oxygen, ozone or chlorine, mixed in, this results in a particularly even reaction with the Medium.

Analoges gilt, wenn in das fließende Medium, beispielsweise Faserstoffsuspension, eine Flüssigkeit und/oder Chemikalien, wie z.B. Wasser, Peroxid, Laugen, Säuren, Additive oder Hilfsstoffe, eingemischt werden.The same applies if the flowing medium, for example fiber suspension, a liquid and / or chemicals, e.g. Water, Peroxide, alkalis, acids, additives or auxiliary substances can be mixed in.

Besonders günstig hat es sich erwiesen, wenn Dampf und/oder Gas und/oder Flüssigkeit gemeinsam eingemischt werden.It has proven particularly favorable if steam and / or gas and / or liquid are mixed in together.

Eine besonders günstige Variante besteht darin, dass die vermischten Fluide gleichzeitig gefördert werden.A particularly favorable variant is that the mixed fluids be promoted at the same time.

Die Erfindung betrifft auch eine Vorrichtung zum Einmischen von Fluiden in fließfähige Medien, beispielsweise Faserstoffsuspensionen. Diese ist erfindungsgemäß dadurch gekennzeichnet, dass ein Rotor, der eine hohe Relativgeschwindigkeit zwischen dem zuzusetzenden Fluid und dem fließenden Medium erzeugt, vorgesehen ist. Das zuzusetzende Fluid wird dadurch feinst im Medium, beispielsweise Faserstoffsuspension, verteilt.The invention also relates to a device for mixing fluids in flowable media, for example fiber suspensions. This is characterized in that a rotor that has a high Relative speed between the fluid to be added and the generated flowing medium is provided. The fluid to be added will thereby very finely distributed in the medium, for example fiber suspension.

Werden im Bereich der hohen Relativgeschwindigkeit Verteilsysteme, insbesondere Düsen, angeordnet, so können die einzumischenden Fluide an optimaler Stelle zugeführt werden.Be in the field of high relative speed distribution systems, in particular Nozzles arranged so that the fluids to be mixed can optimal place.

Besonders vorteilhaft erweist es sich, wenn der Rotor eine Hohlwelle zur Zuführung der Fluide aufweist. Damit kann das einzumischende Fluid direkt in das fließende Medium eingebracht und besonders gleichmäßig verteilt werden.It proves particularly advantageous if the rotor has a hollow shaft Has supply of the fluids. This allows the fluid to be mixed in directly introduced into the flowing medium and distributed evenly become.

Eine besonders günstige Verteilung kann erreicht werden, wenn an der Hohlwelle mindestens ein Verteilstern angebracht ist. Dies ermöglicht eine besonders gute Verteilung des einzumischenden Fluids.A particularly favorable distribution can be achieved if the Hollow shaft at least one distribution star is attached. This enables one particularly good distribution of the fluid to be mixed.

Wenn der Rotor eine zusätzliche fördernde Wirkung aufweist, kann in vielen Fällen auf eine entsprechende Pumpe verzichtet werden.If the rotor has an additional promoting effect, many can In such cases, an appropriate pump can be omitted.

Eine weitere Möglichkeit zur Erzeugung einer hohen Relativgeschwindigkeit zwischen fließendem Medium und zuzusetzendem Fluid besteht darin, dass ein mit Paddeln versehener Rotor das fließende Medium mit großer Geschwindigkeit an Einspeisedüsen vorbeifördert, durch die das zuzusetzende Fluid eingespeist wird.Another way to generate a high relative speed between flowing medium and fluid to be added is that a rotor provided with paddles the flowing medium with large Speed is conveyed past the feed nozzles, through which the to be added Fluid is fed.

Die Erfindung betrifft auch eine Anlage zum Einmischen von Fluiden in fließfähige Medien, insbesondere Faserstoffsuspensionen. Vorteilhaft ist es, wenn die Vorrichtung in einer Rohrleitung, insbesondere einer Umlenkung einer Rohrleitung, angeordnet ist.The invention also relates to a system for mixing fluids in flowable media, in particular fiber suspensions. It is advantageous if the device is in a pipeline, in particular a deflection a pipeline.

Alternativ kann die Vorrichtung in einem Behälter oder direkt vor einem Reaktionsbehälter angeordnet sein.Alternatively, the device can be in a container or directly in front of one Reaction container can be arranged.

Die Erfindung wird nun anhand der Zeichnungen beispielhaft beschrieben, wobei Fig. 1 eine Vorrichtung gemäß dem Stand der Technik, Fig. 2 eine Variante der Erfindung, Fig. 3 eine weitere Variante der Erfindung, Fig. 4 bis 6 verschiedene Anordnungen der Erfindung und Fig. 7 ein Beispiel eines erfindungsgemäßen Rotors darstellen.The invention will now be described by way of example with reference to the drawings, 1 shows a device according to the prior art, FIG. 2 shows a device 3 shows a further variant of the invention, 4 to 6 different arrangements of the invention and Fig. 7 an example represent a rotor according to the invention.

Fig. 1 zeigt eine Anlage nach dem Stand der Technik. Hier wird mittels einer Pumpe 2 eine Faserstoff- bzw. Zellstoffsuspension aus einem Behälter 1 abgepumpt, wobei der Behälter 1 z.B. ein Standrohr eines Wäschers oder Speichertanks sein kann. In der Rohrleitung 4 ist neben der Pumpe 2 auch eine Dampfeinspeisung 6, bestehend aus mehreren Dampfventilen, die um den Leitungsumfang angeordnet sind, vorgesehen. Anschließend wird mittels einer Druckerhöhungspumpe 8 die Suspension in einen Behandlungsbehälter 9 eingebracht. Die Suspension muss an der Stelle der Dampfzufuhr einen geringeren Druck aufweisen, als der zugeführte Dampf, der meist Niederdruckdampf ist.Fig. 1 shows a system according to the prior art. Here is a Pump 2 a pulp or pulp suspension from a container 1 pumped out, the container 1 e.g. a standpipe of a washer or Storage tanks can be. In the pipeline 4 is in addition to the pump 2 a steam feed 6, consisting of several steam valves around the circumference of the lines are provided. Then using a booster pump 8 the suspension in one Treatment container 9 introduced. The suspension must be in the place of Steam supply have a lower pressure than the steam supplied, which is mostly low pressure steam.

Fig. 2 zeigt eine erfindungsgemäße Vorrichtung 10, wobei durch eine Leitung 11 das fließfähige Medium, beispielsweise eine Faserstoffsuspension, zugeführt und über eine Leitung 12 das mit einem Fluid vermischte Medium wieder abgeführt wird. Die Vorrichtung 10 weist dabei eine rotierende Hohlwelle 13 auf, durch die ein Fluid 14, wie z. B. Dampf, ein Gas oder eine Flüssigkeit, zugeführt wird. Am Ende der Hohlwelle 13 ist eine Verteileinrichtung 15 mit Öffnungen 16 angeordnet, durch die das einzumischende Fluid direkt mit hoher Relativgeschwindigkeit in das fließende bzw. strömende Medium eingebracht wird.Fig. 2 shows a device 10 according to the invention, whereby through a line 11 the flowable medium, for example a fiber suspension, fed and via a line 12, the medium mixed with a fluid is discharged again. The device 10 has a rotating Hollow shaft 13 through which a fluid 14, such as. B. steam, a gas or a Liquid is supplied. At the end of the hollow shaft 13 is one Distributor 15 arranged with openings 16 through which Fluid to be mixed directly into the flowing or flowing medium is introduced.

Eine weitere Variante der Erfindung ist in Fig. 3 dargestellt. Die Vorrichtung 10 weist hier eine rotierende Welle 17 mit Rotorblättern 18 auf. Weiters können noch spezielle Verteileinrichtungen 19 angeordnet sein. Das einzumischende Fluid wird bei dieser Variante über entsprechend angeordnete Düsen 20 eingebracht, wobei auch an den unterschiedlichen Positionen unterschiedliche Fluide eingebracht werden können. So könnte z.B. an der der Zufuhrrohrleitung 11 nächstgelegenen Zugabestelle 20' Dampf zur Aufheizung eingespeist werden. Dieser Dampf kondensiert rasch, so dass an der nächsten Position 20" bereits ein Reaktionsgas wie z.B. Ozon oder auch ein flüssiges Reaktionsmittel wie z.B. Peroxid, gleichmäßig eingemischt werden kann.Another variant of the invention is shown in FIG. 3. The device 10 here has a rotating shaft 17 with rotor blades 18. Furthermore, special distribution devices 19 can also be arranged. The In this variant, the fluid to be mixed is correspondingly arranged nozzles 20 introduced, also at the different Positions different fluids can be introduced. So could e.g. at the addition point 20 'closest to the feed pipe 11 Steam can be fed for heating. This vapor condenses quickly so that at the next position 20 "there is already a reaction gas such as ozone or a liquid reactant such as e.g. Peroxide, evenly can be mixed in.

Fig. 4 bis 6 zeigen unterschiedliche Anordnungen der Vorrichtung 10. Fig. 4 entspricht dabei etwa Fig. 2, wobei hier die Vorrichtung 10 in einem Rohrleitungskrümmer 21 angeordnet ist. Durch die Umlenkung der Strömung wird die Vermischung noch verbessert und Reibungsverluste reduziert.4 to 6 show different arrangements of the device 10. FIG. 4 corresponds approximately to FIG. 2, with device 10 in one Pipe elbow 21 is arranged. By redirecting the flow the mixing is further improved and friction losses are reduced.

Die Anordnung in Fig. 5 zeigt eine erfindungsgemäße Vorrichtung 10, die in einem Behälter 22 angeordnet ist. Der Rotor 23 sitzt hier auf einer Hohlwelle 13, durch die ein entsprechendes Fluid wie z.B. Dampf, Gas oder eine Flüssigkeit gleichmäßig eingemischt wird. Im Fall einer sogenannten Stoffbütte in der Papierindustrie wird durch die vom Rotor 23 erzeugte Turbulenz die gesamte Flüssigkeit im Behälter umgewälzt und somit eine gleichmäßige Einmischung gewährleistet.The arrangement in FIG. 5 shows a device 10 according to the invention, which in a container 22 is arranged. The rotor 23 sits here on a hollow shaft 13 through which a corresponding fluid such as e.g. Steam, gas or one Liquid is mixed in evenly. In the case of a so-called Cloth chest in the paper industry is generated by the rotor 23 Turbulence circulates all of the liquid in the container and thus one uniform interference guaranteed.

Fig. 6 zeigt eine erfindungsgemäße Anordnung der Vorrichtung 10 in einem Reaktor 24. Das Medium, beispielsweise Faserstoffsuspension, wird über eine Rohrleitung 11' dem Reaktor 24 zugeführt. Das Fluid, z.B. Dampf, Gas oder ein flüssiges Reaktionsmittel wird durch die Hohlwelle 13 des Rotors, der mit mindestens einem Verteilstern ausgestattet ist, direkt in das fließende Medium mit hoher Relativgeschwindigkeit eingespeist und dort gleichmäßig verteilt.6 shows an arrangement according to the invention of the device 10 in one Reactor 24. The medium, for example fiber suspension, is over a pipe 11 'is fed to the reactor 24. The fluid, e.g. Steam, gas or a liquid reactant is through the hollow shaft 13 of the rotor, which is equipped with at least one distribution star, directly into the flowing one Medium fed in at a high relative speed and there evenly distributed.

Fig. 7 zeigt ein Beispiel für einen erfindungsgemäßen Rotor. Man kann hier die Austrittsöffnungen 16 für das einzumischende Fluid gut erkennen.7 shows an example of a rotor according to the invention. Here, you can well recognize the outlet openings 16 for the fluid to be mixed.

Eine bevorzugte Anwendung der Erfindung liegt bei der Einmischung von Dampf und/oder Chemikalien im Bereich der Zellstoffdelignifizierung und -bleiche. Im allgemeinen werden hier in eine Hackschnitzel- Kochlaugen-Suspension oder in eine Zellstoffsuspension mit einem Faseranteil von 0,1 bis zu 20 % Dampf zum Erhitzen der Suspension und/oder Chemikalien zur Delignifizierung und/oder Bleiche eingemischt. Dabei können je nach Bedarf Gase wie Sauerstoff, Ozon, Chlor, Chlordioxid, Schwefeldioxid, oder Flüssigkeiten wie Weißlauge oder Peroxid eingesetzt werden. Zusätzlich ist für die Reaktion die Temperatur ein wesentliches Kriterium. Es wird somit mittels Dampf die Ausgangstemperatur der Zellstoffsuspension von zwischen 10 und 100 °C auf eine höhere Temperatur bis zu etwa 180 °C gebracht. Mit der vorliegenden Erfindung ist es möglich, die Temperatur der Zellstoffsuspension gleichmäßig zu erhöhen und somit nachteilige teilweise Überhitzungen von Teilen des Mediums zu vermeiden. Bei geeigneter Wahl der Zufuhrpositionen kann in die bereits aufgeheizte Suspension (Einstellung der erforderlichen/gewünschten Reaktionstemperatur) gleichmäßig das gewünschte Reaktionsgas bzw. die flüssige Reaktionschemikalie eingemischt werden. Auch Säuren bzw. Laugen können günstig zur pH-Wert Einstellung eingemischt werden.A preferred application of the invention is the mixing in of Steam and / or chemicals in the field of pulp delignification and -bleaching. Generally, here are in a wood chips cooking liquor suspension or in a pulp suspension with a fiber content of 0.1 to 20% steam to heat the suspension and / or chemicals mixed in for delignification and / or bleaching. Depending on Requires gases such as oxygen, ozone, chlorine, chlorine dioxide, sulfur dioxide, or Liquids such as white liquor or peroxide can be used. In addition is temperature is an important criterion for the reaction. So it will using steam the initial temperature of the pulp suspension from between 10 and 100 ° C brought to a higher temperature up to about 180 ° C. With In the present invention, it is possible to control the temperature of the Increase pulp suspension evenly and thus partially disadvantageous Avoid overheating of parts of the medium. With a suitable choice the feed positions can be in the already heated suspension (setting the required / desired reaction temperature) evenly Desired reaction gas or the liquid reaction chemical to be mixed in. Acids and alkalis can also be beneficial for pH Setting can be mixed in.

Claims (14)

Verfahren zum Einmischen von Fluiden in fließfähige Medien, beispielsweise Faserstoffsuspensionen, dadurch gekennzeichnet, dass das einzumischende Fluid mit einer hohen Relativgeschwindigkeit zum fließenden Medium in dieses Medium z.B. Faserstoffsuspensionen, eingemischt wird.Method for mixing fluids in flowable media, for example fiber suspensions, characterized in that the fluid to be mixed is mixed into this medium, for example fiber suspensions, at a high relative speed to the flowing medium. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass in das fließende Medium, insbesondere Faserstoffsuspension, Dampf eingemischt und somit das Medium, insbesondere Faserstoffsuspension auf eine höhere Temperatur, beispielsweise bis zu 180 °C, erwärmt wird.A method according to claim 1 or 2, characterized in that steam is mixed into the flowing medium, in particular fiber suspension, and thus the medium, in particular fiber suspension, is heated to a higher temperature, for example up to 180 ° C. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass in das Medium, insbesondere Faserstoffsuspension, ein Gas, vorzugsweise Reaktionsgas, wie z.B. Sauerstoff, Ozon oder Chlor, eingemischt wird.A method according to claim 1, characterized in that a gas, preferably reaction gas, such as oxygen, ozone or chlorine, is mixed into the medium, in particular fiber suspension. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass in das Medium, insbesondere Faserstoffsuspension, eine Flüssigkeit und/oder Chemikalien, wie z.B. Wasser, Peroxid, Laugen, Säuren, Additive oder Hilfsstoffe, eingemischt werden.A method according to claim 1, characterized in that a liquid and / or chemicals, such as water, peroxide, alkalis, acids, additives or auxiliaries, are mixed into the medium, in particular fiber suspension. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass Dampf und/oder Gas und/oder Flüssigkeit gemeinsam eingemischt werden.Method according to one of claims 1 to 4, characterized in that steam and / or gas and / or liquid are mixed in together. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die vermischten Fluide gleichzeitig gefördert werden.Method according to one of claims 1 to 5, characterized in that the mixed fluids are conveyed simultaneously. Vorrichtung zum Einmischen von Fluiden in fließfähige Medien, beispielsweise Faserstoffsuspensionen, dadurch gekennzeichnet, dass ein Rotor (10), der eine hohe Relativgeschwindigkeit zwischen dem zuzusetzenden Fluid und dem fließenden Medium erzeugt, vorgesehen ist. Device for mixing fluids in flowable media, for example fiber suspensions, characterized in that a rotor (10) which generates a high relative speed between the fluid to be added and the flowing medium is provided. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass im Bereich der hohen Relativgeschwindigkeiten Verteilsysteme (15), insbesondere Düsen (16, 20, 20',20"), angeordnet sind.Apparatus according to claim 7, characterized in that distribution systems (15), in particular nozzles (16, 20, 20 ', 20 "), are arranged in the region of the high relative speeds. Vorrichtung nach einem der Ansprüche 7 oder 8, dadurch gekennzeichnet, dass der Rotor (10) eine Hohlwelle (13) zur Zuführung der Fluide aufweist.Device according to one of claims 7 or 8, characterized in that the rotor (10) has a hollow shaft (13) for supplying the fluids. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass am Ende der Hohlwelle (13) ein Verteilstern (15) vorgesehen ist.Apparatus according to claim 9, characterized in that a distribution star (15) is provided at the end of the hollow shaft (13). Vorrichtung nach einem der Ansprüche 7 bis 10, dadurch gekennzeichnet, dass der Rotor (10) eine zusätzliche fördernde Wirkung aufweist.Device according to one of claims 7 to 10, characterized in that the rotor (10) has an additional promoting effect. Anlage zum Einmischen von Fluiden in fließfähige Medien, beispielsweise Faserstoffsuspensionen, mit einer Vorrichtung nach einem der Ansprüche 7 bis 11, dadurch gekennzeichnet, dass die Vorrichtung (10) in einer Rohrleitung (21), insbesondere einer Umlenkung einer Rohrleitung, angeordnet ist.System for mixing fluids in flowable media, for example fiber suspensions, with a device according to one of claims 7 to 11, characterized in that the device (10) is arranged in a pipeline (21), in particular a deflection of a pipeline. Anlage zum Einmischen von Fluiden in fließfähige Medien, beispielsweise Faserstoffsuspensionen, mit einer Vorrichtung nach einem der Ansprüche 7 bis 11, dadurch gekennzeichnet, dass die Vorrichtung (10) in einem Behälter (22) angeordnet ist.Plant for mixing fluids into flowable media, for example fiber suspensions, with a device according to one of claims 7 to 11, characterized in that the device (10) is arranged in a container (22). Anlage zum Einmischen von Fluiden in fließfähige Medien, beispielsweise Faserstoffsuspensionen, mit einer Vorrichtung nach einem der Ansprüche 7 bis 11, dadurch gekennzeichnet, dass die Vorrichtung (10) direkt vor einem Reaktionsbehälter (24) angeordnet ist.Plant for mixing fluids in flowable media, for example fiber suspensions, with a device according to one of claims 7 to 11, characterized in that the device (10) is arranged directly in front of a reaction container (24).
EP03005018A 2002-03-21 2003-03-06 Method and apparatus for mixing fluids into fluid media Revoked EP1347092B1 (en)

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AT0043102A AT413017B (en) 2002-03-21 2002-03-21 METHOD AND DEVICE FOR MIXING FLUIDS INTO FLOWABLE MEDIA

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DE102013017887B4 (en) * 2013-10-28 2016-09-15 Bernhard Giersberg mixing device
CN107961687B (en) * 2017-11-21 2024-05-28 中国中轻国际工程有限公司 Internal-mounted static liquid mixing structure and control method thereof

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US9102885B2 (en) 2013-07-26 2015-08-11 Renmatix, Inc. Method of transporting viscous slurries

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ES2290370T3 (en) 2008-02-16
AT413017B (en) 2005-10-15
CN1302837C (en) 2007-03-07
PT1347092E (en) 2007-10-24
ATE368147T1 (en) 2007-08-15
ATA4312002A (en) 2005-03-15
CN1446620A (en) 2003-10-08
DE50307745D1 (en) 2007-09-06
EP1347092B1 (en) 2007-07-25

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