DE2544204A1 - Simultaneous stirring and bubbling of gas through liquids - with mechanical stirrers with hollow shafts - Google Patents

Simultaneous stirring and bubbling of gas through liquids - with mechanical stirrers with hollow shafts

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Publication number
DE2544204A1
DE2544204A1 DE19752544204 DE2544204A DE2544204A1 DE 2544204 A1 DE2544204 A1 DE 2544204A1 DE 19752544204 DE19752544204 DE 19752544204 DE 2544204 A DE2544204 A DE 2544204A DE 2544204 A1 DE2544204 A1 DE 2544204A1
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DE
Germany
Prior art keywords
stirring blades
gas
stirrer
stirring
liquids
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.)
Pending
Application number
DE19752544204
Other languages
German (de)
Inventor
Gunter Dr Buxbaum
Siegfried Dipl Ing Neher
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.)
Bayer AG
Original Assignee
Bayer AG
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Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Priority to DE19752544204 priority Critical patent/DE2544204A1/en
Publication of DE2544204A1 publication Critical patent/DE2544204A1/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/20—Activated sludge processes using diffusers
    • C02F3/205—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors
    • 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
    • B01F23/2335—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 direction of introduction of the gas relative to the stirrer
    • B01F23/23352—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 direction of introduction of the gas relative to the stirrer the gas moving perpendicular to the axis of rotation
    • 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
    • B01F23/2335—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 direction of introduction of the gas relative to the stirrer
    • B01F23/23354—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 direction of introduction of the gas relative to the stirrer the gas being driven away from the rotating stirrer
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/14—Activated sludge processes using surface aeration
    • C02F3/16—Activated sludge processes using surface aeration the aerator having a vertical axis
    • 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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/111—Centrifugal stirrers, i.e. stirrers with radial outlets; Stirrers of the turbine type, e.g. with means to guide the flow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Abstract

Appts. comprises a vessel for a suspension liq., and a stirrer comprising a hollow shaft for the gas discharging into the space between two horizontal, parallel discs held at a distance from one another by stirrer blades. The stirrer blades extend axially and radially past the edges of the discs, which are of equal dia. Device is esp. for gaseous-solid-liq. catalytic reactions in suspensions and for mixing of highly viscous liqs. in pigment prodns. The stirrer combines effective gas distribution with efficient stirring action in the upward and downward directions.

Description

Vorrichtung zum Begasen und Rühren von Suspensionen undDevice for gassing and stirring suspensions and

Flüssigkeiten Die Erfindung richtet sich auf eine Vorrichtung zum gleichzeitigen Begasen und Rühren von Suspensionen und anderen Flüssigkeiten, bestehend aus einem Behälter, in dem zwei durch Rührblätter in einem bestimmten Abstand verbundene Scheiben coaxial unter einer lotrechten, antreibbaren Hohlwelle befestigt sind, deren gasführender Hohlraum zwischen den Scheiben mündet.Liquids The invention is directed to an apparatus for simultaneous gassing and stirring of suspensions and other liquids, consisting of from a container in which two are connected by stirring blades at a certain distance Disks are fixed coaxially under a vertical, drivable hollow shaft, whose gas-carrying cavity opens between the panes.

Die Vorrichtung dient dazu, bei Fest-Flüssig-Gas Reaktionen und/ oder Mischungen, wie sie insbesondere bei katalytischen Reaktionen und in strukturviskosen Suspensionen während der Herstellung von Pigmenten anfallen, für kurzfristigen intensiven Stoffaustausch zu sorgen.The device is used for solid-liquid-gas reactions and / or Mixtures, such as those used in particular in catalytic reactions and in structurally viscous Suspensions accumulate during the manufacture of pigments, for short-term intense To ensure mass transfer.

Zum Rühren von Flüssigkeiten und Suspensionen bei gleichzeitiger Begasung sind verschiedene Lösungen bekannt.For stirring liquids and suspensions with simultaneous aeration various solutions are known.

So können fast alle gebräuchlichen Rührer eingesetzt werden, indem sie zusätzlich von unten durch eine oder mehrere Düsen mit Gas umspült werden.Almost all common stirrers can be used by they are additionally flushed with gas from below through one or more nozzles.

Als Nachteile sind zu vermerken: Der Eintritt des Gases in die Flüssigkeit erfolgt nur unter Überdruck. Wegen der überflutungsgefahr ist die zuzusetzende Menge begrenzt. Unter der unsicheren Gasverteilung leidet der Wirkungsgrad. Durch unzureichendes Zerschlagen der Gasblasen wird der intensive Austausch behindert.The following disadvantages are to be noted: The entry of the gas into the liquid only takes place under overpressure. Because of the risk of flooding, the amount to be added is limited. The efficiency suffers from the unsafe gas distribution. By inadequate If the gas bubbles are broken, the intensive exchange is hindered.

Auch sind Rohrrührer bekannt, die das Gas durch die Rohrwelle ansaugen und über die als Rührer quer dazu angeordneten Rohre abgeben, wobei zur Erhöhung der Rührwirkung manchmal noch darunter liegende Propellerrührer angebracht werden.Pipe stirrers are also known which suck in the gas through the pipe shaft and dispense via the pipes arranged transversely thereto as stirrers, whereby to increase Propeller stirrers below may sometimes be attached to ensure the stirring effect.

Der günstigen Verteilung steht der Nachteil gegenüber, daß die Rührleistung gering ist. Auch der Einsatz eines zusätzlichen Propellerrührers bringt keine ausreichende Verbesserung bei strukturviskosen Suspensionen.The favorable distribution is offset by the disadvantage that the stirring power is low. The use of an additional propeller stirrer is also not sufficient Improvement in pseudoplastic suspensions.

Weiter ist ein Scheibenrührer bekannt, bei dem an einer umlaufenden, lotrechten Hohlwelle eine kreisrunde Schreibe hängt, die über nur nach unten sich erstreckende Flügel mit einer im Radius kleineren Scheibe verbunden ist. Das Gas wird über die Hohlwelle angesogen und zwischen den Scheiben verteilt.A disk stirrer is also known in which a rotating, vertical hollow shaft a circular letter hangs over just downwards extending wing is connected to a smaller radius disc. The gas is sucked in via the hollow shaft and distributed between the discs.

Ein solcher Rührer erzeugt in strukturviskosen Fluiden nur eine einseitige, nach unten gerichtete Turbulenz, so daß die Mischleistung gering ist. Die einseitige Abführung der Luft durch den Rührer, nämlich nur nach unten, begrenzt die zuzuführende Menge.Such a stirrer produces only a one-sided, turbulence directed downwards, so that the mixing performance is low. The one-sided Removal of the air through the stirrer, namely only downwards, limits the amount of air to be supplied Lot.

Die unter der oberen Scheibe entstehenden Anhäufungen von Luftblasen erschweren den Austausch.The accumulation of air bubbles under the upper pane complicate the exchange.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung für einen strukturviskosen Fluid zu finden, die bei gleichzeitiger intensiver Begasung Feststoffteilchen in kurzer Zeit fein suspendiert.The invention has for its object to provide a device for a To find structurally viscous fluid which, with simultaneous intensive fumigation, solid particles finely suspended in a short time.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die beiden Scheiben annähernd gleiche Durchmesser besitzen, und daß die Rührblätter über den Rand dieser beiden Scheiben in axialer und radialer Richtung hinausragen.This object is achieved according to the invention in that the two Discs have approximately the same diameter, and that the stirring blades over the The edge of these two disks protrude in the axial and radial directions.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß durch die Anordnung der Rührblätter zu den Scheiben eine zentrale, injektionsartige Gaseinleitung in den turbulenten Grenzbereich einer sich nach unten und einer sich nach oben ausbildenden Wirbelströmung erzielt wird. Neben hoher Rührleistung tritt eine gute Verteilung des Gases auch bei Flüssigkeiten mit hoher Viskosität ein. Gleichzeitig werden koagulierte Gasblasen, wie sie insbesondere bei strukturviskosen Flüssigkeiten auftreten, zerschlagen.The advantages achieved with the invention are in particular: that through the arrangement of the stirring blades to the discs a central, injection-like Gas introduction into the turbulent border area one down and one down upward eddy flow is achieved. In addition to high stirring performance a good distribution of the gas even with liquids with high viscosity. At the same time, there are coagulated gas bubbles, as they are especially in the case of structurally viscous Liquids occur, smashed.

Nach einer Ausführungsform der erfindungsgemäßen Vorrichtung sind die Rührblätter in Drehrichtung unter einem bestimmten Winkel zur Hohlwelle geneigt.According to one embodiment of the device according to the invention are the stirring blades are inclined in the direction of rotation at a certain angle to the hollow shaft.

Dadurch ist es möglich, mit dieser einfachen technischen Maßnahme innerhalb des Behälters die lotrechte Komponente der Strömung zwecks intensiveren Stoffaustausches zu verstärken.This makes it possible with this simple technical measure inside the container the vertical component of the flow in order to intensify it To strengthen the exchange of substances.

In einer anderen Ausführungsform sind die Rührblätter in Drehrichtung konkav ausgebildet.In another embodiment, the stirring blades are in the direction of rotation concave.

Durch diese Form der Blätter findet im Grenzbereich der beiden Strömungswirbel eine intensive Berührung und damit ein guter Austausch statt.This shape of the leaves takes place in the border area of the two flow vortices intensive contact and thus a good exchange takes place.

Nach einer weiteren Ausführungsform beträgt der Abstand zwischen den Scheiben 0,5 bis 5 %, vorzugsweise 0,5 - 2 %, des äußeren Rührerdurchmessers.According to a further embodiment, the distance between the Discs 0.5 to 5%, preferably 0.5-2%, of the outer stirrer diameter.

Durch den Abstand läßt sich die optimal erforderliche Gaszufuhr bei vorgegebener Zähigkeit der Flüssigkeit und Umfangsgeschwindigkeit der Scheiben einstellen.The optimal gas supply required can be achieved through the distance Set the specified viscosity of the liquid and the peripheral speed of the disks.

Nach einer besonderen Ausführungsform sind mindestens 2, jedoch vorzugsweise 6, Rührblätter an den Doppelscheiben angebracht.According to a particular embodiment, at least 2 are preferred, but are preferred 6, stirring blades attached to the double discs.

Die Anzahl der Rührblätter bestimmt die Turbulenz bzw. die Rührleistung.The number of stirring blades determines the turbulence and the stirring performance.

Nach einer vorzugsweisen Ausführungsform befinden sich Bohrungen im äußeren, radialen Bereich der Rührblätter.According to a preferred embodiment, there are holes in the outer, radial area of the stirring blades.

Durch diese Bohrungen wird der Schereffekt vergrößert, während das Drehmoment abnimmt.These holes increase the shear effect, while the Torque decreases.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is shown in the drawings and is described in more detail below.

Es zeigen Fig. 1 eine Vorrichtung im Schnitt und Fig. 2 einen Rührer in der Draufsicht.1 shows a device in section and FIG. 2 shows a stirrer in top view.

In dem Behälter 1 ist eine lotrechte, umlaufende Hohlwelle 2 mit der Bohrung 3 angeordnet, die am unteren Ende coaxial eine kreisrunde, horizontale Scheibe 4 mit mittiger Bohrung 5 trägt.In the container 1 is a vertical, revolving hollow shaft 2 with the Bore 3 arranged, the coaxially a circular, horizontal disc at the lower end 4 with central hole 5 carries.

In einem festen, parallelen Abstand befindet sich darunter eine zweite gleichgroße Schreibe 6, die über die nach drei Seiten überragende Rührblätter 7 mit der oberen Scheibe 4 fest verbunden ist, wobei die Rührblätter im äußeren radialen Bereich Brohrungen 8 enthalten.Below is a second one at a fixed, parallel distance writing 6 of the same size, which is placed over the stirring blades 7 protruding on three sides is firmly connected to the upper disc 4, the stirring blades in the outer radial Pipes area 8 included.

Beispiel In einem Behälter von 300 mm Durchmesser und 450 mm Höhe werden bei 400C 21,9 1 einer Eisen(Il-sulfatlösung mit 160 g FeS04 und 0,85 g ZnS04 pro Liter unter Rühren mit 2,1 1 einer Lösung, die 780 NaOH und 34,3 g Na3P04.12 H20 enthält, eingefüllt.Example In a container with a diameter of 300 mm and a height of 450 mm are at 400C 21.9 l of an iron (II sulfate solution with 160 g FeS04 and 0.85 g ZnS04 per liter while stirring with 2.1 l of a solution containing 780 NaOH and 34.3 g Na3P04.12 Contains H20, filled in.

Der Rührer, bestehend aus einer Hohlwelle mit Innendurchmesser 12 mm und Außendurchmesser 26 mm sowie zwei Schreiben von 80 mm Durchmesser verbunden durch sechs Flügel der Abmessungen 30 x 30 mm, läuft mit einer Umfangsgeschwindigkeit von 980min min = 5,9 m:sec. um, wobei die Lufzufuhr so eingestellt wurde, daß nach ca. 3 h die entstandene fG -FeOOH-Keim-Suspension eine grüngelbe Farbe annimmt. Während dieser Oxydation werden dynamische Viskositäten von über 200 Poise erreicht. Die so hergestellten z>C-FeOOH-Keime weisen ein enges Kornspektrum auf und sind praktisch verwachsungsfrei. Sie sind hervorragend als Ausgangsmaterial für die Herstellung von nadelförmigem magnetischem Eisenoxid geeignet.The stirrer, consisting of a hollow shaft with an inner diameter of 12 mm and outer diameter 26 mm as well as two letters of 80 mm diameter connected with six blades measuring 30 x 30 mm, runs at a peripheral speed from 980min min = 5.9 m: sec. um, the air supply being adjusted so that after approx. 3 h the resulting fG-FeOOH seed suspension takes on a green-yellow color. During this oxidation dynamic viscosities of over 200 poise are reached. The z> C-FeOOH nuclei produced in this way have a narrow grain spectrum and are practically free of fusions. They are excellent as a starting material for manufacturing of acicular magnetic iron oxide.

Claims (6)

Ansprüche 1 Vorrichtung zum gleichzeitigen Begasen und Rühren von Suspensionen und anderen Flüssigkeiten, bestehend aus einem Behälter, in dem zwei durch Rührblätter in einem bestimmten Abstand verbundene Scheiben coaxial unter einer lotrechten, antreibbaren Hohlwelle befestigt sind, deren gasführender Hohlraum zwischen den Scheiben mündet, dadurch gekennzeichnet, daß die beiden Scheiben (4, 6) annähernd gleiche Durchmesser besitzen, und daß die Rührblätter (7) über den Rand dieser beiden Scheiben (4, 6) in axialer und radialer Richtung hinausragen.Claims 1 device for simultaneous gassing and stirring of Suspensions and other liquids, consisting of a container in which two coaxially interconnected by stirring blades at a certain distance a vertical, drivable hollow shaft are attached, the gas-carrying cavity opens out between the panes, characterized in that the two panes (4, 6) have approximately the same diameter, and that the stirring blades (7) over the The edge of these two disks (4, 6) protrude in the axial and radial directions. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Rührblätter (7) in Drehrichtung unter einem bestimmten Winkel zur Hohlwelle (2) geneigt sind.2. Apparatus according to claim 1, characterized in that the stirring blades (7) are inclined in the direction of rotation at a certain angle to the hollow shaft (2). 3. Vorrichtung nach Anspruch 1-2, dadurch gekennzeichnet, daß die Rührblätter (7) in Drehrichtung eine konkave Form haben.3. Apparatus according to claim 1-2, characterized in that the Stirring blades (7) have a concave shape in the direction of rotation. 4. Vorrichtung nach Anspruch 1-3, dadurch gekennzeichnet, daß der Abstand zwischen den Scheiben (4, 6) 0,5 bis 5 % des äußeren Rührerdurchmessers, vorzugsweise 0,5 und 2,0 %,beträgt.4. Apparatus according to claim 1-3, characterized in that the Distance between the disks (4, 6) 0.5 to 5% of the outer stirrer diameter, preferably 0.5 and 2.0%. 5. Vorrichtung nach Anspruch 1-4, dadurch gekennzeichnet, das mindestens 2, jedoch vorzugsweise 6, Rührblätter (7) an den Scheiben (4, 6) angebracht sind.5. Apparatus according to claim 1-4, characterized in that the at least 2, but preferably 6, stirring blades (7) are attached to the discs (4, 6). 6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß sich Bohrungen (8) im äußeren radialen Bereich der Rührblätter (7) befinden.6. Apparatus according to claim 5, characterized in that there are bores (8) are located in the outer radial area of the stirring blades (7).
DE19752544204 1975-10-03 1975-10-03 Simultaneous stirring and bubbling of gas through liquids - with mechanical stirrers with hollow shafts Pending DE2544204A1 (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9106768U1 (en) * 1991-06-03 1991-07-25 Stelzer Ruehrtechnik Gmbh, 3530 Warburg, De
EP0553709A1 (en) * 1992-01-31 1993-08-04 V-Zug AG Device for introducing a gas in a liquid
WO1994000223A1 (en) * 1992-06-25 1994-01-06 Thames Water Utilities Limited A nozzle
FR2732236A1 (en) * 1995-04-03 1996-10-04 Roland Jean Louis DEVICE FOR INTRODUCING A GAS INTO A LIQUID
EP0754489A1 (en) * 1995-07-20 1997-01-22 Air Products And Chemicals, Inc. Method and apparatus to improve gas dispersion and gas mass transfer in a stirred tank reactor
CN105498294A (en) * 2015-12-29 2016-04-20 浙江天晨胶业股份有限公司 Degassing equipment
WO2018104197A1 (en) * 2016-12-05 2018-06-14 General Electric Company Impeller including one or more turbulators, for a bioreactor system
CN112604637A (en) * 2020-12-31 2021-04-06 江苏富爱科技发展有限公司 Catalytic reaction kettle for preparing high polymer material
FR3129850A1 (en) * 2021-12-07 2023-06-09 Université de Nantes Device for carrying out evaluation test of waste water

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516921A1 (en) * 1991-06-03 1992-12-09 Stelzer Rührtechnik GmbH Gasing stirrer
US5318360A (en) * 1991-06-03 1994-06-07 Stelzer Ruhrtechnik Gmbh Gas dispersion stirrer with flow-inducing blades
DE9106768U1 (en) * 1991-06-03 1991-07-25 Stelzer Ruehrtechnik Gmbh, 3530 Warburg, De
EP0553709A1 (en) * 1992-01-31 1993-08-04 V-Zug AG Device for introducing a gas in a liquid
CH686874A5 (en) * 1992-01-31 1996-07-31 V Zug Ag Device for introducing a gas into a liquid.
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US5643503A (en) * 1995-04-03 1997-07-01 Roland; Jean-Louis Device for introducing a gas into a liquid
FR2732236A1 (en) * 1995-04-03 1996-10-04 Roland Jean Louis DEVICE FOR INTRODUCING A GAS INTO A LIQUID
EP0736322A1 (en) * 1995-04-03 1996-10-09 Jean-Louis Roland Apparatus for introducing a gas into a liquid
EP0754489A1 (en) * 1995-07-20 1997-01-22 Air Products And Chemicals, Inc. Method and apparatus to improve gas dispersion and gas mass transfer in a stirred tank reactor
CN105498294A (en) * 2015-12-29 2016-04-20 浙江天晨胶业股份有限公司 Degassing equipment
WO2018104197A1 (en) * 2016-12-05 2018-06-14 General Electric Company Impeller including one or more turbulators, for a bioreactor system
JP2020500700A (en) * 2016-12-05 2020-01-16 ゼネラル・エレクトリック・カンパニイ Impeller for a bioreactor system with one or more turbulence generators
US11629322B2 (en) 2016-12-05 2023-04-18 Global Life Sciences Solutions Usa Llc Impeller including one or more turbulators, for a bioreactor system
CN112604637A (en) * 2020-12-31 2021-04-06 江苏富爱科技发展有限公司 Catalytic reaction kettle for preparing high polymer material
FR3129850A1 (en) * 2021-12-07 2023-06-09 Université de Nantes Device for carrying out evaluation test of waste water
WO2023105163A1 (en) * 2021-12-07 2023-06-15 Nantes Universite Device for carrying out a test to evaluate wastewater

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