EP1055450A2 - Agitator - Google Patents

Agitator Download PDF

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Publication number
EP1055450A2
EP1055450A2 EP00111186A EP00111186A EP1055450A2 EP 1055450 A2 EP1055450 A2 EP 1055450A2 EP 00111186 A EP00111186 A EP 00111186A EP 00111186 A EP00111186 A EP 00111186A EP 1055450 A2 EP1055450 A2 EP 1055450A2
Authority
EP
European Patent Office
Prior art keywords
agitator
gas
shaft
hollow
hub
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.)
Granted
Application number
EP00111186A
Other languages
German (de)
French (fr)
Other versions
EP1055450B1 (en
EP1055450A3 (en
Inventor
Peter Forschner
Günter Greiner
Werner Himmelsbach
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.)
EKATO Ruehr und Mischtechnik GmbH
Original Assignee
EKATO Ruehr und Mischtechnik GmbH
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Publication of EP1055450A2 publication Critical patent/EP1055450A2/en
Publication of EP1055450A3 publication Critical patent/EP1055450A3/en
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Publication of EP1055450B1 publication Critical patent/EP1055450B1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20Mixing gases with liquids
    • B01F23/23Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2332Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements the stirrer rotating about a horizontal axis; Stirrers therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/71Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with propellers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis

Definitions

  • the invention relates to an agitator for stirring liquids in a stirred container, a gas being supplied to the liquid, in particular for suspending of solids and gas dispersion in the liquid in flue gas desulfurization plants, with a stirring shaft and a stirring propeller sitting on it.
  • fumigation pipes or fumigation lances For the fumigation of absorbers from flue gas desulphurization plants previously used fumigation pipes or fumigation lances. It refers to simple, horizontal pipes with holes or around vertical pipes through which the gas, usually air, is blown in. High gas rates can with such Pipes or lances can no longer be distributed efficiently.
  • the invention is therefore based on the object of a stirrer of the abovementioned Kind in such a way that even higher gas rates efficiently in the liquid in the Stirring tanks can be distributed, and the gas introduced through the agitator can be predispersed.
  • this is achieved in that the agitator shaft is hollow and the gas can be supplied through the hollow stirring shaft and into the stirring container can be introduced.
  • the agitator is rotatably connected to the Stirring shaft connected, hollow hub through which the gas is feasible and insertable into the stirred tank.
  • the hollow stirrer shaft and the hollow hub are expediently in the region of their ends on the container side with cross bores for introducing the gas into the stirred container Mistake.
  • a gassing device in the region of the container is advantageous Arranged end of the agitator shaft or the hub.
  • the gassing device is preferably in the form of a plurality of in particular tubes running radially to the longitudinal axis of the agitator shaft or the hub, with the interior of the agitator shaft or the hub or with the agitator shaft connected pipes is connected.
  • the gassing device is in the form of a Chamber formed which surrounds the agitator shaft or the hub and with the Interior of the agitator shaft or the hub is connected.
  • the outlet openings of the tubes and the chamber preferably lie through which flows the gas into the stirred tank, on a diameter that is about 35 is up to 75% of the diameter of the stirring propeller.
  • the axial distance between the gassing device and the propeller is appropriate 25% to 75% of the stirring propeller.
  • the outlet openings of the gassing device for introducing the gas into the Stirring tanks are preferably arranged on the pressure side of the stirring propeller
  • a stationary distributor head is advantageously used to supply the gas intended.
  • the hub can advantageously only in the region of the inner end of the massive stirrer shaft, the gas of the hollow hub via a pipe carried out through the wall of the stirred tank can be fed directly.
  • FIG. 1 schematically shows an agitator 10 which is located in the interior of an agitator 12 is installed.
  • the stirred tank 12 can be the absorber of a flue gas desulfurization system.
  • the agitator 10 comprises an agitator shaft 14, which from the outside through the wall of the Stirring container 12 protrudes into the interior of the latter.
  • the longitudinal axis of the In the installed position, the agitator shaft 14 runs essentially horizontally or up to approximately 15 ° down.
  • the agitator shaft 14 can by a not shown external drive can be rotated.
  • An axial conveyor in shape sits on the agitator shaft 14 inside the agitator container 12 a propeller 16, which is rotatably connected to the agitator shaft 14 and the material to be stirred promotes in the direction of arrow P.
  • the agitator shaft 14, as the figure shows, is hollow and outside the agitator tank 12 coupled to a fixed distribution head 18, which the gas to Example air, via a pipe feed 20 and by means of a not shown Fan can be fed.
  • the agitator shaft 14 has radial bores 22 in the area of the distributor head 18 which enter the gas from the distributor head 18 into the interior of the agitator shaft 14 can.
  • seals 24 are between the stationary distributor head 18 and the rotatable agitator shaft 14 suitable seals 24 (for example lip seals, labyrinth seals or Gap seals) installed, also between the agitator shaft 14 and the wall of the Stirring tank 12.
  • the inner end 36 of the agitator shaft 14 is closed at the end, but it is in the Area of this inner end with transverse to its longitudinal axis in the Cylinder wall formed through openings 26.
  • This gassing device 28 is, for example, as shown schematically in Figure 4 shows, from four radially extending tubes 30, each at its outer ends Have outlet opening 32 for the gas.
  • the pipes are 30 sloping at their outer ends, for example at an angle of 45 ° to her Longitudinal axis, cut off, whereby the outlet openings 32 are formed.
  • the tubes 30 can also be closed on their end faces and Outlet openings 30 can be formed in the cylinder wall of the respective tube be, wherein only one, but also several, outlet openings are provided per tube can.
  • the outlet openings 32 of the tubes 30 are based on the direction of rotation R Fumigation device 28, on the back of the tubes 30, that is, on the vacuum side of the gas channels or the pipes 30, whereby a back pressure before the Pipes corresponding negative pressure is generated, which in a possible pressure loss the gas supply is reduced or that with small liquid coverages of the outlet opening 32 can also be used for self-priming (without an external fan).
  • the axial distance A between the center plane of the propeller 16 and the center plane the gassing device 28 is expediently about 25 to 75% of the propeller diameter, so that any gas kick back has an effect the axial conveyor, that is, the propeller 16, can not affect.
  • the outlet openings 32 lie on a diameter which is larger than that Diameter of the agitator shaft 14 or the hub 34 ( Figure 2), preferably the Diameter of the circle on which the centers of the outlet openings 32 lie, approximately 35% to 75% of the propeller diameter.
  • FIG. 5 shows a further embodiment of the gassing device 28.
  • This gassing device has the shape of a triangular, for example Chamber 48 which, as Figure 5 shows, the container end of the hollow agitator shaft 14 or the hollow hub 34 and which rotatably with the shaft 14 or Hub 34 is connected.
  • the axial width of the chamber 48 in the direction of the longitudinal axis of the agitator shaft 14 or the hub 34 is selected so that the chamber 48 at least the radial bores 26 in the agitator shaft 14 or the radial bores 38 in the hub 34 covered.
  • the width of the chamber 48 is somewhat larger than that Diameter of these bores 22 and 38.
  • the chamber 48 has three outlet openings 32, through which the supplied via the shaft 14 or the hub 34 and by the Bores 26 and 38 gas entering the chamber 48 into the stirred tank 12 is blown in.
  • the outlet openings can extend over the entire axial width the chamber 48 extend.
  • the chamber 48 according to FIG. 5 also lies the outlet openings 32 based on the direction of rotation R of the gassing device 28 on the back of the chamber 48, whereby the one already described above Negative pressure is generated.
  • the axial distance lies between the center plane of the propeller 16 and the axial center plane of the chamber 48 at about 25% to 75% of the propeller diameter. Also the middle of the Outlet openings 32 of the chamber 48 on a diameter that is about 35% to 75% of the propeller diameter.
  • FIG. 2 shows a further embodiment of the agitator 10 according to the invention.
  • the stationary one is outside of the stirring container 12 arranged distributor head 18 coupled to the massive stirrer shaft 15, wherein the agitator shaft 15 is passed through the distributor head 18 and between the the latter and the agitator shaft 15 seals 24 are installed.
  • the agitator shaft 15 sits the axial conveyor in the form of the propeller 16.
  • the agitator shaft 15 and the propeller 16 in this embodiment is a hollow hub 34 non-rotatably connected, from which in the pipe feed 20 and via an annular space 40 between the stirrer shaft 15 and the distributor head 18, the gas can be introduced is.
  • the hub 34 runs concentrically to the agitator shaft 15 and overlaps its outer end 42 the inner end 44 of the distribution head 18, which in this embodiment something protrudes into the latter through the wall of the stirred tank 12.
  • the inner end 46 of the hub 34 is closed at the end, but in the area of this inner end 46 is the hollow hub 34 with radial, in its cylindrical wall trained holes 38 equipped.
  • the propeller 16 conveys the liquid Direction of arrow P.
  • the gassing device 28 is non-rotatable with the Stirring shaft 14 or the hub 34 connected and thus rotates together with the Stirrer shaft 14 or the hub 34 and the propeller 16 as a unit.
  • the gas is thus not shown Blower via the pipe feed 20, the distributor head 18, the radial bores 22, the hollow agitator shaft 14, and the radial bores 26 in the latter in the Tubes 30 or the chamber 48 of the gassing device 28 and fed through whose outlet openings 32 are blown into the liquid in the stirred tank 12.
  • the gas is by means of a not shown Blower via the pipe feed 20, the annular space 40 between the agitator shaft 15 and the distributor head 18, the hollow hub 34 and the radial bores 38 in the the latter, introduced into the tubes 30 or the chamber 43 of the gassing device 28 and through their outlet openings 32 into the liquid in the stirred tank 12 blown in.
  • the gassing device 28 which has the axial distance A from the propeller 16, is located based on the peripheral wall of the stirred tank inwards from the propeller 16 and the pressure side of the latter.
  • the gas is thus from the outside through the hollow stirring shaft 14 or the hollow Hub 34 is introduced into the stirring container 12 and by means of the gassing device 28 on the pressure side of the propeller 16 of the liquid in the stirred tank 12 fed.
  • the propeller 16 generates a sufficiently strong jet of liquid to simultaneously Suspend solids in the liquid and the gas in the liquid too disperse.
  • Figure 3 schematically shows a side view of an embodiment of the invention Agitator.
  • the agitator shaft 15 is solid in the embodiment of Figure 2.
  • the inner end face of the distributor head 18 is closed by a wall 58, which axially engages over the inner end 44 of the distributor head 18, with between the wall 58 and the inner end 44 of the distributor head 18 a suitable Seal 24 is installed.
  • the end wall 58 is rotatably connected to the agitator shaft 15.
  • agitator shaft 15 On the outer circumference of the agitator shaft 15 there are several, for example four, tubes 52 arranged and firmly connected to the agitator shaft 15, which is practically parallel to Stirrer shaft 15 extend and the outer end 60 thereof through the wall 58 in the annular space 40 of the fixed distributor head 18 protrude. (Between the the latter and the shaft 15, a suitable seal 24 is also arranged.)
  • the tubes 52 are in the region of the inner, container-side end 54 of the agitator shaft 15 radially outwards (essentially perpendicular to the longitudinal axis of the shaft 15) bent and thus form radial pipe sections 56, at the free ends of the Outlet openings 32 are formed for the introduction of the gas into the stirred tank 12 are.
  • the pipe sections 56 form the gassing device 28
  • Figure 6 shows another embodiment of the agitator according to the invention.
  • the hub 34 is only in the area of the inner end 54 of FIG massive stirrer shaft 15 and it is suitable for example by welding or by means of screws with this inner end 54 of the agitator shaft 15 connected.
  • the container end 46 of the hollow hub 34 is open and into this end 46 opens the pipe feed 20, between the rotating hub 34 and the stationary pipe feed 20 a suitable seal 24, for example a lip seal or a labyrinth seal or the like is installed.
  • sealing can also be achieved by means of a defined gap, whereby a special seal can be omitted.
  • the embodiment is different from the above-described embodiments 6, the tube 20 from the outside through the wall of the stirred tank 12 passed through.
  • the tube 20 then expediently runs radially into the stirred tank 12 in, is then bent over so that its end portion 21 again is directed outwards to the wall of the stirred tank and thus from the inside opens into the hollow hub 34.
  • the hub 34 according to FIG. 6 is equipped with the gassing device 28 already described provided, which in turn from the tubes 30 ( Figure 4) or from the chamber 48 ( Figure 5) can be formed.
  • the tubes 30, 52 and 56 can have a circular cross-section, rectangular cross-section or have any other suitable cross-section.
  • the chamber 48 according to FIG 5 can also be rectangular in cross section or another have a suitable cross-section.
  • the gassing device 28 can be dispensed with and that Gas is blown directly into the stirred tank.
  • the distributor head 18 can also be integrated into the wall of the agitator 12 or entirely be installed inside the stirred tank 12. In this case the pipe feed 20 passed through the wall of the stirred tank 12 and to the distributor head 18 connected.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)
  • Treating Waste Gases (AREA)
  • Cleaning In General (AREA)

Abstract

The plant is one used for the removal of sulfur from flue gas. The gas is washed in fluid into which air has been mixed. A m blade whose hollow shaft is used as the conduit for the air promotes the mixing. Air is fed into a fixed manifold (18) from wher enters holes in the mixer shaft (14), the shaft rotating in seals (24). The air then enters a set of radial tubes (30) with open ends through holes (26) at the other end of the shaft, which is closed by a plate (36). The open ends are formed by cuts slanted that the opening faces away from the direction of rotation. The axis distance A between the mixer blade and the distributor is 25-75% of the diameter of the blade and that the radial length of distributor tubes (30) is 35-75% of the radius of the mixer blade.

Description

Die Erfindung betrifft ein Rührwerk zum Rühren von Flüssigkeiten in einem Rührbehälter, wobei der Flüssigkeit ein Gas zugeführt wird, insbesondere zum Suspendieren von Feststoffen und Dispergieren von Gas in der Flüssigkeit bei Rauchgasentschwefelungsanlagen, mit einer Rührwelle und einem auf dieser sitzenden Rührpropeller.The invention relates to an agitator for stirring liquids in a stirred container, a gas being supplied to the liquid, in particular for suspending of solids and gas dispersion in the liquid in flue gas desulfurization plants, with a stirring shaft and a stirring propeller sitting on it.

Für die Begasung von Absorbern von Rauchgasentschwefelungsanlagen werden bisher Begasungsrohre oder Begasungslanzen eingesetzt. Dabei handelt es sich um einfache, horizontale Rohre mit Bohrungen oder um vertikale Rohre, durch welche das Gas, in der Regel Luft, eingeblasen wird. Hohe Gasraten können mit solchen Rohren oder Lanzen nicht mehr effizient verteilt werden.For the fumigation of absorbers from flue gas desulphurization plants previously used fumigation pipes or fumigation lances. It refers to simple, horizontal pipes with holes or around vertical pipes through which the gas, usually air, is blown in. High gas rates can with such Pipes or lances can no longer be distributed efficiently.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Rührer der oben genannten Art so weiterzubilden, daß auch höhere Gasraten effizient in der Flüssigkeit im Rührbehälter verteilt werden können, und das eingeführte Gas durch das Rührwerk vordispergiert werden kann. The invention is therefore based on the object of a stirrer of the abovementioned Kind in such a way that even higher gas rates efficiently in the liquid in the Stirring tanks can be distributed, and the gas introduced through the agitator can be predispersed.

Nach der Erfindung wird dies dadurch erreicht, daß die Rührwelle hohl ausgebildet und das Gas durch die hohle Rührwelle hindurch zuführbar und in den Rührbehälter einführbar ist.According to the invention, this is achieved in that the agitator shaft is hollow and the gas can be supplied through the hollow stirring shaft and into the stirring container can be introduced.

Nach einer anderen Ausführungsform ist das Rührwerk mit einer drehfest mit der Rührwelle verbundenen, hohl ausgebildeten Nabe versehen, durch welche das Gas durchführbar und in den Rührbehälter einführbar ist.According to another embodiment, the agitator is rotatably connected to the Stirring shaft connected, hollow hub through which the gas is feasible and insertable into the stirred tank.

Nach noch einer Ausführungsform ist die Rührwelle mit einer Mehrzahl von mit ihr fest verbundenen Rohren versehen, denen das Gas direkt von außerhalb des Rührbehälters zuführbar ist.According to another embodiment, the agitator shaft is with a plurality of them firmly connected pipes, which receive the gas directly from outside the stirred tank is feedable.

Zweckmäßigerweise sind die hohle Rührwelle und die hohle Nabe im Bereich ihrer behälterseitigen Enden mit Querbohrungen zur Einführung des Gases in den Rührbehälter versehen.The hollow stirrer shaft and the hollow hub are expediently in the region of their ends on the container side with cross bores for introducing the gas into the stirred container Mistake.

Vorteilhafterweise ist eine Begasungseinrichtung im Bereich des behälterseitigen Endes der Rührwelle oder der Nabe angeordnet.A gassing device in the region of the container is advantageous Arranged end of the agitator shaft or the hub.

Die Begasungseinrichtung ist vorzugsweise in Form einer Mehrzahl von insbesondere radial zur Längsachse der Rührwelle bzw. der Nabe verlaufenden Rohren ausgebildet, die mit dem Innenraum der Rührwelle bzw. der Nabe bzw. den mit der Rührwelle verbundenen Rohren in Verbindung steht.The gassing device is preferably in the form of a plurality of in particular tubes running radially to the longitudinal axis of the agitator shaft or the hub, with the interior of the agitator shaft or the hub or with the agitator shaft connected pipes is connected.

Nach einer anderen Ausführungsform ist die Begasungseinrichtung in Form einer Kammer ausgebildet, welche die Rührwelle oder die Nabe umgibt und mit dem Innenraum der Rührwelle bzw. der Nabe in Verbindung steht.According to another embodiment, the gassing device is in the form of a Chamber formed which surrounds the agitator shaft or the hub and with the Interior of the agitator shaft or the hub is connected.

Vorzugsweise liegen die Austrittsöffnungen der Rohre und der Kammer, durch welche das Gas in den Rührbehälter einströmt, auf einem Durchmesser, der etwa 35 bis 75 % des Durchmessers des Rührpropellers beträgt. The outlet openings of the tubes and the chamber preferably lie through which flows the gas into the stirred tank, on a diameter that is about 35 is up to 75% of the diameter of the stirring propeller.

Es ist ferner vorteilhaft, die Austrittsöffnungen der Rohre und der Kammer auf der, bezogen auf die Drehrichtung der Begasungseinrichtung, Rückseite, das heißt der Unterdruckseite der Rohre bzw. der Kammer auszubilden.It is also advantageous to have the outlet openings of the tubes and the chamber on the based on the direction of rotation of the gassing device, back, that is Form vacuum side of the pipes or the chamber.

Um ein Zurückschlagen von Gas zum Rührpropeller zu vermeiden, beträgt der axiale Abstand der Begasungseinrichtung zum Rührpropeller zweckmäßigerweise etwa 25 % bis 75 % des Rührpropellers.In order to prevent gas from striking back to the agitator propeller, the axial The distance between the gassing device and the propeller is appropriate 25% to 75% of the stirring propeller.

Die Austrittsöffnungen der Begasungseinrichtung zum Einführen des Gases in den Rührbehälter sind vorzugsweise auf der Druckseite des Rührpropellers angeordnetThe outlet openings of the gassing device for introducing the gas into the Stirring tanks are preferably arranged on the pressure side of the stirring propeller

Für die Zuführung des Gases ist vorteilhafterweise ein ortsfester Verteilerkopf vorgesehen.A stationary distributor head is advantageously used to supply the gas intended.

Vorteilhafterweise kann schließlich die Nabe nur im Bereich des inneren Endes der massiven Rührwelle ausgebildet sein, wobei das Gas der hohlen Nabe über ein durch die Wand des Rührbehältes durchgeführtes Rohr direkt zugeführt werden kann.Finally, the hub can advantageously only in the region of the inner end of the massive stirrer shaft, the gas of the hollow hub via a pipe carried out through the wall of the stirred tank can be fed directly.

Beispielsweise Ausführungsformen der Erfindung werden nachfolgend an Hand der Zeichnung erläutert, in der

  • Fig. 1 schematisch eine erste Ausführungsform eines erfindungsgemäßen Rührwerks zeigt;
  • Fig. 2, 3 und 6 zeigen weitere Ausführungsformen des erfindungsgemäßen Rührwerkes;
  • Fig. 4 und 5 zeigen schematisch in Stirnansicht eine Begasungseinrichtung zur Einleitung des Gases in den Rührbehälter.
  • For example, embodiments of the invention are explained below with reference to the drawing, in which
  • Fig. 1 shows schematically a first embodiment of an agitator according to the invention;
  • 2, 3 and 6 show further embodiments of the agitator according to the invention;
  • 4 and 5 show schematically in front view a gassing device for introducing the gas into the stirred tank.
  • Figur 1 zeigt schematisch ein Rührwerk 10, das im Innern eines Rührbehälters 12 eingebaut ist.FIG. 1 schematically shows an agitator 10 which is located in the interior of an agitator 12 is installed.

    Der Rührbehälter 12 kann der Absorber einer Rauchgasentschwefelungsanlage sein.The stirred tank 12 can be the absorber of a flue gas desulfurization system.

    Bei solchen Absorbern wurden bisher horizontale Begasungsrohre oder Begasungslanzen eingesetzt, mit diesen können jedoch höhere Gasraten nicht mehr effizient verteilt werden. Es ist daher zweckmäßig eine Vordispergierung des in die Flüssigkeit des Absorbers eingeführten Gases durch ein Rührwerk vorzunehmen.So far, horizontal fumigation pipes or fumigation lances have been used with such absorbers used, but with these higher gas rates can no longer be efficient be distributed. It is therefore advisable to predisperse the liquid into the liquid of the absorber gas introduced by an agitator.

    Das Rührwerk 10 umfaßt eine Rührwelle 14, die von außen durch die Wand des Rührbehälters 12 hindurch ins Innere des letzteren hineinragt. Die Längsachse der Rührwelle 14 verläuft in Einbaulage im wesentlichen horizontal oder auch bis zu etwa 15° nach unten geneigt. Die Rührwelle 14 kann durch einen nicht dargestellten äußeren Antrieb in Drehung versetzt werden.The agitator 10 comprises an agitator shaft 14, which from the outside through the wall of the Stirring container 12 protrudes into the interior of the latter. The longitudinal axis of the In the installed position, the agitator shaft 14 runs essentially horizontally or up to approximately 15 ° down. The agitator shaft 14 can by a not shown external drive can be rotated.

    Auf der Rührwelle 14 sitzt im Inneren des Rührbehälters 12 ein Axialförderer in Form eines Propellers 16, der drehfest mit der Rührwelle 14 verbunden ist und das Rührgut in Richtung des Pfeiles P fördert.An axial conveyor in shape sits on the agitator shaft 14 inside the agitator container 12 a propeller 16, which is rotatably connected to the agitator shaft 14 and the material to be stirred promotes in the direction of arrow P.

    Die Rührwelle 14 ist, wie die Figur zeigt, hohl ausgebildet und außerhalb des Rührbehälters 12 mit einem ortsfesten Verteilerkopf 18 gekoppelt, dem das Gas, zum Beispiel Luft, über eine Rohrzuführung 20 und mittels eines nicht dargestellten Gebläses zuführbar ist.The agitator shaft 14, as the figure shows, is hollow and outside the agitator tank 12 coupled to a fixed distribution head 18, which the gas to Example air, via a pipe feed 20 and by means of a not shown Fan can be fed.

    Die Rührwelle 14 hat im Bereich des Verteilerkopfes 18 radiale Bohrungen 22, durch welche das Gas aus dem Verteilerkopf 18 ins Innere der Rührwelle 14 eintreten kann.The agitator shaft 14 has radial bores 22 in the area of the distributor head 18 which enter the gas from the distributor head 18 into the interior of the agitator shaft 14 can.

    Zwischen dem ortsfesten Verteilerkopf 18 und der drehbaren Rührwelle 14 sind geeignete Dichtungen 24 (zum Beispiel Lippendichtungen, Labyrinthdichtungen oder Spaltdichtungen) eingebaut, ebenso zwischen der Rührwelle 14 und der Wand des Rührbehälters 12.Are between the stationary distributor head 18 and the rotatable agitator shaft 14 suitable seals 24 (for example lip seals, labyrinth seals or Gap seals) installed, also between the agitator shaft 14 and the wall of the Stirring tank 12.

    Das Innere Ende 36 der Rührwelle 14 ist stirnseitig geschlossen, sie ist jedoch im Bereich dieses inneren Endes mit quer zu ihrer Längsachse verlaufenden in der Zylinderwand ausgebildeten Durchgangsöffnungen 26 versehen.The inner end 36 of the agitator shaft 14 is closed at the end, but it is in the Area of this inner end with transverse to its longitudinal axis in the Cylinder wall formed through openings 26.

    Auf dem inneren Ende 36 der Rührwelle 14 sitzt eine drehfest mit ihr verbundene Begasungseinrichtung 28 zur Einleitung des über die hohle Rührwelle 14 zugeführten Gases in die Flüssigkeit im Rührbehälter 12.On the inner end 36 of the agitator shaft 14 sits a non-rotatably connected to it Fumigation device 28 for introducing the supplied via the hollow stirrer shaft 14 Gases into the liquid in the stirred tank 12.

    Diese Begasungseinrichtung 28 besteht beispielsweise, wie Figur 4 schematisch zeigt, aus vier radial verlaufenden Rohren 30, die an ihren äußeren Enden je eine Austrittsöffnung 32 für das Gas aufweisen.This gassing device 28 is, for example, as shown schematically in Figure 4 shows, from four radially extending tubes 30, each at its outer ends Have outlet opening 32 for the gas.

    In Figur 4 sind vier solche Rohre 30 dargestellt, es können aber auch mehr oder weniger dieser Rohre 30 vorgesehen sein. Im dargestellten Beispiel sind die Rohre 30 an ihren äußeren Enden schräg, zum Beispiel in einem Winkel von 45° zu ihrer Längsachse, abgeschnitten, wodurch die Austrittsöffnungen 32 gebildet werden.4 shows four such tubes 30, but more or fewer of these tubes 30 may be provided. In the example shown, the pipes are 30 sloping at their outer ends, for example at an angle of 45 ° to her Longitudinal axis, cut off, whereby the outlet openings 32 are formed.

    Die Rohre 30 können aber auch an ihren Stirnseiten geschlossen sein und die Austrittsöffnungen 30 können in der Zylinderwand des jeweiligen Rohres ausgebildet sein, wobei nur eine, aber auch mehrere, Austrittsöffnungen je Rohr vorgesehen sein können.The tubes 30 can also be closed on their end faces and Outlet openings 30 can be formed in the cylinder wall of the respective tube be, wherein only one, but also several, outlet openings are provided per tube can.

    Die Austrittsöffnungen 32 der Rohre 30 liegen, bezogen auf die Drehrichtung R der Begasungseinrichtung 28, auf der Rückseite der Rohre 30, das heißt auf der Unterdruckseite der Gaskanäle bzw. der Rohre 30, wodurch ein dem Staudruck vor den Rohren entsprechender Unterdruck erzeugt wird, der einen etwaigen Druckverlust in der Gaszufuhr reduziert oder der bei kleinen Flüssigkeitsüberdeckungen der Austrittsöffnung 32 auch zur Selbstansaugung (ohne externes Gebläse) genutzt werden kann.The outlet openings 32 of the tubes 30 are based on the direction of rotation R Fumigation device 28, on the back of the tubes 30, that is, on the vacuum side of the gas channels or the pipes 30, whereby a back pressure before the Pipes corresponding negative pressure is generated, which in a possible pressure loss the gas supply is reduced or that with small liquid coverages of the outlet opening 32 can also be used for self-priming (without an external fan).

    Der axiale Abstand A zwischen der Mittelebene des Propellers 16 und der Mittelebene der Begasungseinrichtung 28 beträgt zweckmäßigerweise etwa 25 bis 75% des Propellerdurchmessers, damit ein etwaiges Zurückschlagen von Gas die Wirkung des Axialförderers, das heißt des Propellers 16, nicht beeinträchtigen kann.The axial distance A between the center plane of the propeller 16 and the center plane the gassing device 28 is expediently about 25 to 75% of the propeller diameter, so that any gas kick back has an effect the axial conveyor, that is, the propeller 16, can not affect.

    Die Austrittsöffnungen 32 liegen auf einem Durchmesser, der größer ist als der Durchmesser der Rührwelle 14 bzw. der Nabe 34 (Figur 2), wobei vorzugsweise der Durchmesser des Kreises, auf dem die Mitten der Austrittsöffnungen 32 liegen, etwa 35 % bis 75 % des Propellerdurchmessers beträgt.The outlet openings 32 lie on a diameter which is larger than that Diameter of the agitator shaft 14 or the hub 34 (Figure 2), preferably the Diameter of the circle on which the centers of the outlet openings 32 lie, approximately 35% to 75% of the propeller diameter.

    Figur 5 zeigt eine weitere Ausführungsform der Begasungseinrichtung 28.FIG. 5 shows a further embodiment of the gassing device 28.

    Diese Begasungseinrichtung hat die Form einer zum Beispiel dreieckförmigen Kammer 48, welche, wie Figur 5 zeigt, das behälterseitige Ende der hohlen Rührwelle 14 bzw. der hohlen Nabe 34 umgibt und die drehfest mit der Welle 14 bzw. der Nabe 34 verbunden ist.This gassing device has the shape of a triangular, for example Chamber 48 which, as Figure 5 shows, the container end of the hollow agitator shaft 14 or the hollow hub 34 and which rotatably with the shaft 14 or Hub 34 is connected.

    Die axiale Breite der Kammer 48 in Richtung der Längsachse der Rührwelle 14 bzw. der Nabe 34 ist so gewählt, daß die Kammer 48 mindestens die radialen Bohrungen 26 in der Rührwelle 14 bzw. die radialen Bohrungen 38 in der Nabe 34 überdeckt. Zweckmäßigerweise ist die Breite der Kammer 48 jedoch etwas größer als der Durchmesser dieser Bohrungen 22 bzw. 38.The axial width of the chamber 48 in the direction of the longitudinal axis of the agitator shaft 14 or the hub 34 is selected so that the chamber 48 at least the radial bores 26 in the agitator shaft 14 or the radial bores 38 in the hub 34 covered. Appropriately, the width of the chamber 48 is somewhat larger than that Diameter of these bores 22 and 38.

    Die Kammer 48 hat in der dargestellten Ausführungsform drei Auslaßöffnungen 32, durch welche das über die Welle 14 oder die Nabe 34 zugeführte und durch die Bohrungen 26 bzw. 38 in die Kammer 48 eintretende Gas in den Rührbehälter 12 eingeblasen wird. Die Auslaßöffnungen können sich über die gesamte axiale Breite der Kammer 48 erstrecken. In the embodiment shown, the chamber 48 has three outlet openings 32, through which the supplied via the shaft 14 or the hub 34 and by the Bores 26 and 38 gas entering the chamber 48 into the stirred tank 12 is blown in. The outlet openings can extend over the entire axial width the chamber 48 extend.

    Wie bei den Rohren 30 nach Figur 4 liegen auch bei der Kammer 48 nach Figur 5 die Austrittsöffnungen 32 bezogen auf die Drehrichtung R der Begasungseinrichtung 28 auf der Rückseite der Kammer 48, wodurch der bereits oben beschriebene Unterdruck erzeugt wird.As with the tubes 30 according to FIG. 4, the chamber 48 according to FIG. 5 also lies the outlet openings 32 based on the direction of rotation R of the gassing device 28 on the back of the chamber 48, whereby the one already described above Negative pressure is generated.

    Ebenso wie bei der Begasungseinrichtung nach Figur 4 liegt der axiale Abstand zwischen der Mittelebene des Propellers 16 und der axialen Mittelebene der Kammer 48 bei etwa 25% bis 75% des Propellerdurchmessers. Auch liegen die Mitten der Austrittsöffnungen 32 der Kammer 48 auf einem Durchmesser, der etwa 35% bis 75% des Propellerdurchmessers beträgt.As in the case of the gassing device according to FIG. 4, the axial distance lies between the center plane of the propeller 16 and the axial center plane of the chamber 48 at about 25% to 75% of the propeller diameter. Also the middle of the Outlet openings 32 of the chamber 48 on a diameter that is about 35% to 75% of the propeller diameter.

    Figur 2 zeigt eine weitere Ausführungsform des erfindungsgemäßen Rührwerkes 10.FIG. 2 shows a further embodiment of the agitator 10 according to the invention.

    Bei dieser Ausführungsform ist der ortsfeste, außerhalb des Rührbehälters 12 angeordnete Verteilerkopf 18 mit der hier massiven Rührwelle 15 gekoppelt, wobei die Rührwelle 15 durch den Verteilerkopf 18 hindurchgeführt ist und zwischen dem letzteren und der Rührwelle 15 Dichtungen 24 eingebaut sind. Auf dem inneren Ende der Rührwelle 15 sitzt der Axialförderer in Form des Propellers 16. Mit der Rührwelle 15 und dem Propeller 16 ist aber bei dieser Ausführungsform eine hohle Nabe 34 drehfest verbunden, in welche von der Rohrzuführung 20 her und über einen Ringraum 40 zwischen der Rührwelle 15 und dem Verteilerkopf 18 das Gas einführbar ist.In this embodiment, the stationary one is outside of the stirring container 12 arranged distributor head 18 coupled to the massive stirrer shaft 15, wherein the agitator shaft 15 is passed through the distributor head 18 and between the the latter and the agitator shaft 15 seals 24 are installed. On the inner end the agitator shaft 15 sits the axial conveyor in the form of the propeller 16. With the agitator shaft 15 and the propeller 16 in this embodiment is a hollow hub 34 non-rotatably connected, from which in the pipe feed 20 and via an annular space 40 between the stirrer shaft 15 and the distributor head 18, the gas can be introduced is.

    Die Nabe 34 verläuft konzentrisch zur Rührwelle 15 und ihr äußeres Ende 42 übergreift das innere Ende 44 des Verteilerkopfes 18, das bei dieser Ausführungsform durch die Wand des Rührbehälters 12 hindurch etwas in den letzteren hineinragt.The hub 34 runs concentrically to the agitator shaft 15 and overlaps its outer end 42 the inner end 44 of the distribution head 18, which in this embodiment something protrudes into the latter through the wall of the stirred tank 12.

    Zwischen dem Ende 42 der Nabe 34 und dem Ende 44 des Verteilerkopfes 18 ist eine geeignete Dichtung 24 eingebaut. Is between the end 42 of the hub 34 and the end 44 of the distributor head 18 a suitable seal 24 is installed.

    Das innere Ende 46 der Nabe 34 ist stirnseitig geschlossen, aber im Bereich dieses inneren Endes 46 ist die hohle Nabe 34 mit radialen, in ihrer zylindrischen Wand ausgebildeten Bohrungen 38 ausgestattet.The inner end 46 of the hub 34 is closed at the end, but in the area of this inner end 46 is the hollow hub 34 with radial, in its cylindrical wall trained holes 38 equipped.

    Auf dem inneren Ende 46 der Nabe 34 sitzt, wie bei der Ausführungsform nach Figur 1, eine Begasungseinrichtung 28, wie sie an Hand der Figuren 4 und 5 bereits beschrieben wurde. Über die radialen Bohrungen 38 tritt das durch die hohle Nabe 34 zugeführte Gas in die Begasungseinrichtung 28 ein, und durch die Austrittsöffnungen 32 der letzteren wird das Gas in die Flüssigkeit im Rührbehälter 12 eingeblasen.Sitting on the inner end 46 of the hub 34, as in the embodiment according to the figure 1, a gassing device 28, as already shown in FIGS. 4 and 5 has been described. This occurs through the hollow bores via the radial bores 38 34 supplied gas into the gassing device 28, and through the outlet openings 32 of the latter, the gas enters the liquid in the stirred tank 12 blown in.

    Wie bei der Ausführungsform nach Figur 1 fördert der Propeller 16 die Flüssigkeit in Richtung des Pfeiles P.As in the embodiment according to FIG. 1, the propeller 16 conveys the liquid Direction of arrow P.

    In beiden Ausführungsformen ist die Begasungseinrichtung 28 drehfest mit der Rührwelle 14 bzw. der Nabe 34 verbunden und dreht sich somit zusammen mit der Rührwelle 14 bzw. der Nabe 34 und dem Propeller 16 als Einheit.In both embodiments, the gassing device 28 is non-rotatable with the Stirring shaft 14 or the hub 34 connected and thus rotates together with the Stirrer shaft 14 or the hub 34 and the propeller 16 as a unit.

    Bei der Ausführungsform nach Figur 1 wird somit das Gas von einem nicht gezeigten Gebläse über die Rohrzuführung 20, den Verteilerkopf 18, die radialen Bohrungen 22, die hohle Rührwelle 14, und die radialen Bohrungen 26 in der letzteren in die Rohre 30 oder die Kammer 48 der Begasungseinrichtung 28 zugeführt und durch deren Austrittsöffnungen 32 in die Flüssigkeit im Rührbehälter 12 eingeblasen.In the embodiment according to FIG. 1, the gas is thus not shown Blower via the pipe feed 20, the distributor head 18, the radial bores 22, the hollow agitator shaft 14, and the radial bores 26 in the latter in the Tubes 30 or the chamber 48 of the gassing device 28 and fed through whose outlet openings 32 are blown into the liquid in the stirred tank 12.

    Bei der Ausführungsform nach Figur 2 wird das Gas mittels eines nicht gezeigten Gebläses über die Rohrzuführung 20, den Ringraum 40 zwischen der Rührwelle 15 und dem Verteilerkopf 18, die hohle Nabe 34 und die radialen Bohrungen 38 in der letzteren, in die Rohre 30 oder die Kammer 43 der Begasungseinrichtung 28 eingeführt und durch deren Austrittsöffnungen 32 in die Flüssigkeit im Rührbehälter 12 eingeblasen. In the embodiment of Figure 2, the gas is by means of a not shown Blower via the pipe feed 20, the annular space 40 between the agitator shaft 15 and the distributor head 18, the hollow hub 34 and the radial bores 38 in the the latter, introduced into the tubes 30 or the chamber 43 of the gassing device 28 and through their outlet openings 32 into the liquid in the stirred tank 12 blown in.

    Die Begasungseinrichtung 28, die den axialen Abstand A vom Propeller 16 hat, liegt bezogen auf die Umfangswand des Rührbehälters einwärts vom Propeller 16 und auf der Druckseite des letzteren.The gassing device 28, which has the axial distance A from the propeller 16, is located based on the peripheral wall of the stirred tank inwards from the propeller 16 and the pressure side of the latter.

    Das Gas wird somit von außen her durch die hohle Rührwelle 14 bzw. die hohle Nabe 34 in den Rührbehälter 12 eingeleitet und mittels der Begasungseinrichtung 28 auf der Druckseite des Propellers 16 der im Rührbehälter 12 befindlichen Flüssigkeit zugeführt.The gas is thus from the outside through the hollow stirring shaft 14 or the hollow Hub 34 is introduced into the stirring container 12 and by means of the gassing device 28 on the pressure side of the propeller 16 of the liquid in the stirred tank 12 fed.

    Der Propeller 16 erzeugt einen ausreichend starken Flüssigkeitsstrahl, um gleichzeitig Feststoffe in der Flüssigkeit zu suspendieren und das Gas in der Flüssigkeit zu dispergieren.The propeller 16 generates a sufficiently strong jet of liquid to simultaneously Suspend solids in the liquid and the gas in the liquid too disperse.

    Figur 3 zeigt schematisch in Seitenansicht noch eine Ausführungsform des erfindungsgemäßen Rührwerks.Figure 3 schematically shows a side view of an embodiment of the invention Agitator.

    Bei dieser Ausführungsform nach Figur 3 ist die Rührwelle 15 massiv ausgebildet wie bei der Ausführungsform nach Figur 2. Auf der Rührwelle 15 sitzt, wie bei den bisherigen Ausführungsformen, der drehfest mit ihr verbundene Axialförderer in Form des Rührpropellers 16. Ebenso wie bei der Ausführungsform nach Figur 2 ragt das innere Ende 44 des ortsfesten Verteilerkopfes 18 etwas ins Innere des Rührbehälters 12 hinein.In this embodiment according to FIG. 3, the agitator shaft 15 is solid in the embodiment of Figure 2. Sitting on the agitator shaft 15, as in the previous embodiments, the rotationally connected axial conveyor in shape of the stirring propeller 16. Just as in the embodiment according to FIG. 2, this protrudes inner end 44 of the stationary distributor head 18 somewhat into the interior of the stirred tank 12 in.

    Die innere Stirnseite des Verteilerkopfes 18 ist durch eine Wand 58 geschlossen, welche das innere Ende 44 des Verteilerkopfes 18 axial übergreift, wobei zwischen der Wand 58 und dem inneren Ende 44 des Verteilerkopfes 18 eine geeignete Dichtung 24 eingebaut ist.The inner end face of the distributor head 18 is closed by a wall 58, which axially engages over the inner end 44 of the distributor head 18, with between the wall 58 and the inner end 44 of the distributor head 18 a suitable Seal 24 is installed.

    Die Stirnwand 58 ist drehfest mit der Rührwelle 15 verbunden. The end wall 58 is rotatably connected to the agitator shaft 15.

    Am Außenumfang der Rührwelle 15 sind mehrere, zum Beispiel vier, Rohre 52 angeordnet und fest mit der Rührwelle 15 verbunden, die praktisch parallel zur Rührwelle 15 verlaufen und deren äußeres Ende 60 durch die Wand 58 hindurch in den Ringraum 40 des ortsfesten Verteilerkopfes 18 hineinragen. (Zwischen dem letzteren und der Welle 15 ist ebenfalls eine geeignete Dichtung 24 angeordnet.)On the outer circumference of the agitator shaft 15 there are several, for example four, tubes 52 arranged and firmly connected to the agitator shaft 15, which is practically parallel to Stirrer shaft 15 extend and the outer end 60 thereof through the wall 58 in the annular space 40 of the fixed distributor head 18 protrude. (Between the the latter and the shaft 15, a suitable seal 24 is also arranged.)

    Die Rohre 52 sind im Bereich des inneren, behälterseitigen Endes 54 der Rührwelle 15 radial nach außen (im wesentlichen rechtwinklig zur Längsachse der Welle 15) abgebogen und bilden somit radiale Rohrabschnitte 56, an deren freien Enden die Austrittsöffnungen 32 für die Einleitung des Gases in den Rührbehälter 12 ausgebildet sind.The tubes 52 are in the region of the inner, container-side end 54 of the agitator shaft 15 radially outwards (essentially perpendicular to the longitudinal axis of the shaft 15) bent and thus form radial pipe sections 56, at the free ends of the Outlet openings 32 are formed for the introduction of the gas into the stirred tank 12 are.

    Die Ausbildung dieser Austrittsöffnungen 32 und ihre Lage ist dieselbe wie bei den Austrittsöffnungen 32 der Rohre 30 nach Figur 1 oder Figur 2. Ebenso hat die Mittelebene der Rohrabschnitte 56 von der Mittelebene des Rührpropellers 16 den axialen Abstand A.The formation of these outlet openings 32 and their position is the same as in the Outlet openings 32 of the tubes 30 according to Figure 1 or Figure 2. Likewise, the Center plane of the pipe sections 56 from the center plane of the stirring propeller 16 den axial distance A.

    Bei der Ausführungsform nach Figur 3 bilden die Rohrabschnitte 56 die Begasungseinrichtung 28.In the embodiment according to FIG. 3, the pipe sections 56 form the gassing device 28

    Figur 6 zeigt noch eine Ausführungsform des erfindungsgemäßen Rührwerks.Figure 6 shows another embodiment of the agitator according to the invention.

    Bei dieser Ausführungsform ist die Nabe 34 nur im Bereich des inneren Endes 54 der massiven Rührwelle 15 ausgebildet und sie ist in geeigneter Weise zum Beispiel durch Schweißen oder mittels Schrauben mit diesem inneren Ende 54 der Rührwelle 15 verbunden.In this embodiment, the hub 34 is only in the area of the inner end 54 of FIG massive stirrer shaft 15 and it is suitable for example by welding or by means of screws with this inner end 54 of the agitator shaft 15 connected.

    Das behälterseitige Ende 46 der hohlen Nabe 34 ist offen und in dieses Ende 46 mündet die Rohrzuführung 20, wobei zwischen der rotierenden Nabe 34 und der ortsfesten Rohrzuführung 20 eine geeignete Dichtung 24, zum Beispiel eine Lippendichtung oder eine Labyrinthdichtung oder dergleichen, eingebaut ist. The container end 46 of the hollow hub 34 is open and into this end 46 opens the pipe feed 20, between the rotating hub 34 and the stationary pipe feed 20 a suitable seal 24, for example a lip seal or a labyrinth seal or the like is installed.

    Es kann aber auch eine Abdichtung mittels eines definierten Spaltes erreicht werden, wodurch eine besondere Dichtung entfallen kann.However, sealing can also be achieved by means of a defined gap, whereby a special seal can be omitted.

    Anders als bei den oben beschriebenen Ausführungsformen ist bei der Ausführungsform nach Figur 6 das Rohr 20 von außen her durch die Wand des Rührbehälters 12 hindurchgeführt. Das Rohr 20 verläuft dann zweckmäßigerweise radial in den Rührbehälter 12 hinein, ist dann umgebogen derart, daß sein Endabschnitt 21 wieder nach außen zur Wand des Rührbehälters hin gerichtet ist und damit von innen her in die hohle Nabe 34 einmündet.The embodiment is different from the above-described embodiments 6, the tube 20 from the outside through the wall of the stirred tank 12 passed through. The tube 20 then expediently runs radially into the stirred tank 12 in, is then bent over so that its end portion 21 again is directed outwards to the wall of the stirred tank and thus from the inside opens into the hollow hub 34.

    Auf diese Weise kann das Gas über die Rohrzuführung 20, 21 direkt in die hohle Nabe 34 eingeleitet und eingeblasen werden.In this way, the gas can be fed directly into the hollow via the pipe feed 20, 21 Hub 34 are introduced and blown.

    Die Nabe 34 nach Figur 6 ist mit der bereits beschriebenen Begasungseinrichtung 28 versehen, die ihrerseits aus den Rohren 30 (Figur 4) oder aus der Kammer 48 (Figur 5) gebildet sein kann.The hub 34 according to FIG. 6 is equipped with the gassing device 28 already described provided, which in turn from the tubes 30 (Figure 4) or from the chamber 48 (Figure 5) can be formed.

    Die Rohre 30, 52 und 56 können einen Kreisquerschnitt, Rechteckquerschnitt oder einen anderen beliebigen, geeigneten Querschnitt haben. Die Kammer 48 nach Figur 5 kann im Querschnitt auch rechteckförmig ausgebildet sein oder einen anderen geeigneten Querschnitt haben.The tubes 30, 52 and 56 can have a circular cross-section, rectangular cross-section or have any other suitable cross-section. The chamber 48 according to FIG 5 can also be rectangular in cross section or another have a suitable cross-section.

    Gegebenenfalls kann auf die Begasungseinrichtung 28 verzichtet werden und das Gas direkt in den Rührbehälter eingeblasen werden.If necessary, the gassing device 28 can be dispensed with and that Gas is blown directly into the stirred tank.

    Hierdurch kann in Verbindung mit der vom Propeller 16 erzeugten Strömung bereits eine gute Dispergierung des Gases erreicht werden. Diese wird aber durch die Begasungseinrichtung 28 deutlich verbessert.This can already in connection with the flow generated by the propeller 16 good gas dispersion can be achieved. But this is through the Fumigation device 28 significantly improved.

    Der Verteilerkopf 18 kann auch in die Wand des Rührwerks 12 integriert oder ganz im Inneren des Rührbehälters 12 eingebaut sein. In diesem Fall wird die Rohrzuführung 20 durch die Wand des Rührbehälters 12 hindurchgeführt und an den Verteilerkopf 18 angeschlossen.The distributor head 18 can also be integrated into the wall of the agitator 12 or entirely be installed inside the stirred tank 12. In this case the pipe feed 20 passed through the wall of the stirred tank 12 and to the distributor head 18 connected.

    Mit dem erfindungsgemäßen Rührwerk können höhere Stoffübergangsraten und höhere Gasdurchsätze erzielt werden als dies mit den bisher üblichen Begasungsvorrichtungen möglich war.With the agitator according to the invention, higher mass transfer rates and higher gas throughputs can be achieved than with the gassing devices usual up to now was possible.

    Claims (16)

    Rührwerk zum Rühren von Flüssigkeiten in einem Rührbehälter, wobei der Flüssigkeit ein Gas zugeführt wird, insbesondere zum Suspendieren von Feststoffen und Dispergieren von Gas in der Flüssigkeit bei Rauchgasentschwefelungsanlagen, mit einer Rührwelle und einem auf dieser sitzenden Rührpropeller, dadurch gekennzeichnet, daß die Rührwelle (14) hohl ausgebildet und das Gas durch die hohle Rührwelle (14) hindurch zuführbar und in den Rührbehälter (12) einführbar ist.Agitator for stirring liquids in a stirred tank, a gas being supplied to the liquid, in particular for suspending solids and dispersing gas in the liquid in flue gas desulfurization systems, with a stirring shaft and a stirring propeller seated thereon, characterized in that the stirring shaft (14 ) hollow and the gas can be fed through the hollow stirrer shaft (14) and into the stirrer (12). Rührwerk zum Rühren von Flüssigkeiten in einem Rührbehälter, wobei der Flüssigkeit ein Gas zugeführt wird, insbesondere zum Suspendieren von Feststoffen und Dispergieren von Gas in der Flüssigkeit bei Rauchgasentschwefelungsanlagen, mit einer Rührwelle und einem auf dieser sitzenden Rührpropeller, dadurch gekennzeichnet, daß das Rührwerk (10) mit einer drehfest mit der Rührwelle (15) verbundenen, hohl ausgebildeten Nabe (34) versehen und das Gas durch die hohle Nabe (34) hindurch zuführbar und in den Rührbehälter (12) einführbar ist.Agitator for stirring liquids in a stirred tank, a gas being supplied to the liquid, in particular for suspending solids and dispersing gas in the liquid in flue gas desulfurization systems, with an agitator shaft and an agitating propeller seated thereon, characterized in that the agitator (10 ) is provided with a hollow hub (34) connected to the stirrer shaft (15) in a manner fixed against relative rotation, and the gas can be fed through the hollow hub (34) and can be introduced into the stirrer container (12). Rührwerk zum Rühren von Flüssigkeiten in einem Rührbehälter, wobei der Flüssigkeit ein Gas zugeführt wird, insbesondere zum Suspendieren von Feststoffen und Dispergieren von Gas in der Flüssigkeit bei Rauchgasentschwefelungsanlagen, mit einer Rührwelle und einem auf dieser sitzenden Rührpropeller, dadurch gekennzeichnet, daß die Rührwelle (15) mit einer Mehrzahl von um ihren Außenumfang angeordneten und mit ihr verbundenen und in ihrer Längsrichtung verlaufenden Rohren (52) versehen ist, durch welche das Gas zuführbar und in den Rührbehälter (12) einführbar ist.Agitator for stirring liquids in a stirred tank, a gas being supplied to the liquid, in particular for suspending solids and dispersing gas in the liquid in flue gas desulfurization systems, with a stirring shaft and a stirring propeller seated thereon, characterized in that the stirring shaft (15 ) is provided with a plurality of pipes (52) arranged around its outer circumference and connected to it and running in their longitudinal direction, through which the gas can be supplied and introduced into the stirred tank (12). Rührwerk nach Anspruch 2, dadurch gekennzeichnet, daß die Nabe (34) im Bereich des inneren Endes (54) der Rührwelle (15) ausgebildet ist und das Gas der hohlen Nabe (34) über ein durch die Wand des Rührbehälters (12) hindurchgeführtes Rohr (20/21) direkt zuführbar ist.Agitator according to claim 2, characterized in that the hub (34) is formed in the region of the inner end (54) of the agitator shaft (15) and the gas of the hollow hub (34) via a pipe which is led through the wall of the agitator container (12) (20/21) can be fed directly. Rührwerk nach Anspruch 1, 2 oder 4, dadurch gekennzeichnet, daß die hohle Rührwelle (14) bzw. die hohle Nabe (34) im Bereich ihrer inneren Enden (36 bzw. 46) mit Querbohrungen (26 bzw. 38) versehen sind zur Einleitung des Gases in den Rührbehälter (12)Agitator according to Claim 1, 2 or 4, characterized in that the hollow agitator shaft (14) or the hollow hub (34) are provided with transverse bores (26 or 38) in the area of their inner ends (36 or 46) for introduction the gas into the stirred tank (12) Rührwerk nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß an dem in den Rührbehälter (12) hineinragenden Ende (36) der hohlen Rührwelle (14) bzw. dem Ende (46) der hohlen Nabe (34) bzw. dem inneren Ende (54) der massiven Rührwelle (15) eine mit der Rührwelle (14, 15) bzw. der Nabe (34) drehfest verbundene Begasungseinrichtungen (28) angebracht ist zum Einleiten des Gases in den Rührbehälter (12).Agitator according to one of claims 1 to 5, characterized in that at the end (36) of the hollow agitating shaft (14) or the end (46) of the hollow hub (34) or the inner end projecting into the agitating container (12) (54) of the massive stirrer shaft (15) is attached to the stirrer shaft (14, 15) or the hub (34) non-rotatably connected gassing devices (28) for introducing the gas into the stirrer tank (12). Rührwerk nach Anspruch 6, dadurch gekennzeichnet, daß die Begasungseinrichtung (28) in Form einer Mehrzahl von insbesondere radial verlaufender Rohre (30) ausgebildet ist, die mit dem Innenraum der hohlen Rührwelle (14) bzw. der hohlen Nabe (34) in Verbindung stehen.Agitator according to claim 6, characterized in that the gassing device (28) is designed in the form of a plurality of in particular radially extending pipes (30) which are connected to the interior of the hollow agitator shaft (14) or the hollow hub (34) . Rührwerk nach Anspruch 6, dadurch gekennzeichnet, daß die Begasungseinrichtung (28) in Form einer Kammer (48) ausgebildet ist, welche die Rührwelle (14) bzw. die Nabe (34) umgibt und mit dem Innenraum der hohlen Rührwelle (14) bzw. der hohlen Nabe (34) in Verbindung steht.Agitator according to claim 6, characterized in that the gassing device (28) is designed in the form of a chamber (48) which surrounds the agitator shaft (14) or the hub (34) and with the interior of the hollow agitator shaft (14) or the hollow hub (34) communicates. Rührwerk nach Anspruch 6 und 3, dadurch gekennzeichnet, daß die Begasungseinrichtung (28) aus einer Mehrzahl von insbesondere radial verlaufenden Rohrabschnitten (56) besteht, und jeder Rohrabschnitt (56) jeweils mit einem der Rohre (52) verbunden ist oder einteilig mit diesem ausgebildet ist.Agitator according to claims 6 and 3, characterized in that the gassing device (28) consists of a plurality of pipe sections (56), in particular radially running, and each pipe section (56) is connected to one of the pipes (52) or is formed in one piece therewith is. Rührwerk nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, daß die Austrittsöffnungen (32) der Rohre (30), ebenso die der Kammer (48) und die der Rohrabschnitte (56) auf einem Durchmesser liegen, der etwa 35% bis 75% des Durchmessers des Rührpropellers (16) beträgt.Agitator according to one of Claims 6 to 9, characterized in that the outlet openings (32) of the tubes (30), likewise those of the chamber (48) and those of the tube sections (56), have a diameter which is approximately 35% to 75% of the diameter of the stirring propeller (16). Rührwerk nach einem der Ansprüche 6 bis 10, dadurch gekennzeichnet, daß die Austrittsöffnungen (32) der Rohre (30), ebenso die der Kammer (48) und die der Rohrabschnitte (56) auf der, bezogen auf die Drehrichtung der Begasungseinrichtung (28), Rückseite (Unterdruckseite) der Rohre (30), der Kammer (48) bzw. der Rohrabschnitte (56) ausgebildet sind.Agitator according to one of claims 6 to 10, characterized in that the outlet openings (32) of the tubes (30), as well as those of the chamber (48) and those of the tube sections (56) on the, based on the direction of rotation of the gassing device (28) , Back (vacuum side) of the tubes (30), the chamber (48) or the tube sections (56) are formed. Rührwerk nach einem der Ansprüche 6 bis 11, dadurch gekennzeichnet, daß der axiale Abstand A der Mittelebene der Begasungseinrichtung (28) und der Mittelebene des Rührpropellers (16) etwa 25% bis 75% des Durchmessers des Rührpropellers (16) beträgt.Agitator according to one of Claims 6 to 11, characterized in that the axial distance A between the central plane of the gassing device (28) and the central plane of the agitating propeller (16) is approximately 25% to 75% of the diameter of the agitating propeller (16). Rührwerk nach einem der Ansprüche 6 bis 12, dadurch gekennzeichnet, daß die Begasungseinrichtung (28) zum Einblasen des Gases in den Rührbehälter(12) auf der Druckseite des Rührpropellers (16) angeordnet ist.Agitator according to one of claims 6 to 12, characterized in that the gassing device (28) for blowing the gas into the agitation vessel (12) is arranged on the pressure side of the agitation propeller (16). Rührwerk nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß es mit einem ortsfesten Verteilerkopf (18) ausgerüstet ist zur Zuführung des Gases zur hohlen Rührwelle (14) bzw. zur hohlen Nabe (34) bzw. zu den Rohren (52).Agitator according to claim 1, 2 or 3, characterized in that it is equipped with a stationary distributor head (18) for supplying the gas to the hollow agitator shaft (14) or to the hollow hub (34) or to the tubes (52). Rührwerk nach Anspruch 1 und 14, dadurch gekennzeichnet, daß die hohle Rührwelle (14) mit radialen Bohrungen (22) versehen ist, durch welche das Gas vom Verteilerkopf (18) in die Rührwelle (14) einführbar ist.Agitator according to claims 1 and 14, characterized in that the hollow agitator shaft (14) is provided with radial bores (22) through which the gas from the distributor head (18) can be introduced into the agitator shaft (14). Rührwerk nach Anspruch 2 und 14, oder Anspruch 3 und 13, dadurch gekennzeichnet, daß das Gas vom Verteilerkopf (18) über einen Ringraum (40) zwischen dem letzteren und der Rührwelle (15) in die hohle Nabe (34) bzw. die Rohre (52) einführbar ist.Agitator according to claims 2 and 14, or claims 3 and 13, characterized in that the gas from the distributor head (18) via an annular space (40) between the latter and the agitator shaft (15) into the hollow hub (34) or the tubes (52) can be introduced.
    EP00111186A 1999-05-27 2000-05-24 Agitator Expired - Lifetime EP1055450B1 (en)

    Applications Claiming Priority (2)

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    DE29909312U 1999-05-27
    DE29909312U DE29909312U1 (en) 1999-05-27 1999-05-27 Agitator

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    EP (1) EP1055450B1 (en)
    JP (1) JP4828013B2 (en)
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    Also Published As

    Publication number Publication date
    DE29909312U1 (en) 1999-08-12
    EP1055450B1 (en) 2005-07-27
    JP2001000851A (en) 2001-01-09
    DE50010802D1 (en) 2005-09-01
    ATE300350T1 (en) 2005-08-15
    US6439756B1 (en) 2002-08-27
    JP4828013B2 (en) 2011-11-30
    EP1055450A3 (en) 2002-06-19
    KR20010049418A (en) 2001-06-15
    KR100472620B1 (en) 2005-03-08

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