[go: up one dir, main page]

EP0993862B2 - Self-sucking rotatable dispersing device - Google Patents

Self-sucking rotatable dispersing device Download PDF

Info

Publication number
EP0993862B2
EP0993862B2 EP99120397A EP99120397A EP0993862B2 EP 0993862 B2 EP0993862 B2 EP 0993862B2 EP 99120397 A EP99120397 A EP 99120397A EP 99120397 A EP99120397 A EP 99120397A EP 0993862 B2 EP0993862 B2 EP 0993862B2
Authority
EP
European Patent Office
Prior art keywords
gas
dispersing device
self
aspirating
hollow shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99120397A
Other languages
German (de)
French (fr)
Other versions
EP0993862B1 (en
EP0993862A1 (en
Inventor
Peter Dipl.-Ing. Forschner
Rainer Dr.-Ing. Krebs
Hans-Jürgen Dipl.-Ing. Weis
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8063844&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0993862(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by EKATO Ruehr und Mischtechnik GmbH filed Critical EKATO Ruehr und Mischtechnik GmbH
Publication of EP0993862A1 publication Critical patent/EP0993862A1/en
Publication of EP0993862B1 publication Critical patent/EP0993862B1/en
Application granted granted Critical
Publication of EP0993862B2 publication Critical patent/EP0993862B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B01F23/2335—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
    • 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
    • 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
    • B01F27/15—Stirrers with tubes for guiding the material
    • 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

Definitions

  • the invention relates to a self-priming, rotatable dispersing device for gases and liquids or a self-priming two-phase turbine for mixing gases and liquids according to the preamble of patent claim 1.
  • Such a self-priming, rotatable dispersing device of the aforementioned kind is known from GB 724791A.
  • the gas suction takes place via the rotationally driven hollow shaft and liquid is introduced into the interior of the turbine, so that the thorough mixing of gas and liquid takes place within the turbine space.
  • a self-priming two-phase turbine operates satisfactorily up to a gas / liquid phase ratio of about 25/30%.
  • the self-priming two-phase turbine is flooded and even with a speed increase no higher power input is no longer possible because the sucked gas remains at rest and a higher mass transfer is no longer possible. Therefore, in such a conventional self-priming two-phase turbine, the mass transfer is limited by the predetermined gas / liquid phase ratio.
  • the invention therefore aims to provide a powerful, self-priming dispersing device for gases and liquids or two-phase turbine, overcoming the difficulties described above, which allows a higher mass transfer at the lowest possible power / entry ratios and speed of the dispersing.
  • a self-priming, rotatable dispersing device for gases and liquids is provided whose features are specified in claim 1.
  • a plurality of gas passages are connected to the hollow shaft, which allow a discharge of the gas to be dispersed via gas passage orifices.
  • a negative pressure is generated by the stall, which allows the gas from the gas space is sucked against the static liquid level above the dispersing device.
  • the mixing of gas and liquid takes place outside the interior of the dispersing device, namely in the region of the gas channel openings, since the gas channels provided in the dispersing device according to the invention only lead to dispersing gas and no liquid.
  • the gas channels also generate an intensive fluid delivery, liquid movement and fluid circulation, so that one reaches a high mass transfer by the intensive contacting of the moving liquid with the sucked and dispersed gas.
  • a cover disk is provided on the upper side and underside of the gas ducts, which are axially spaced from the rotationally driven hollow shaft and between which chambers are formed in cooperation with the gas ducts.
  • the underside cover forms a closed surface connected to the hollow shaft.
  • the upper-side cover disc forms a liquid-suction gap in cooperation with the outer surface of the hollow shaft. Liquid is introduced into the chambers between the two axially spaced shrouds and the outer surfaces of the gas passages via this suction gap, which is given an intense agitation movement to enhance the mass transfer.
  • the dispersing device according to the invention is not subject to any restrictions by predetermined gas / liquid phase ratios.
  • an extremely high-performance self-priming, rotating dispersing device or self-aspirating two-phase turbine achieving high mass transfer is obtained.
  • the gas passages extend approximately radially to the hollow shaft.
  • the gas channels may extend at an acute angle to the radial, which is preferably in a range of greater than 0 and less than 25 °, and in particular approximately 15 °.
  • gas passages may be formed in the form of agitating blades to intensify fluid delivery therethrough.
  • the gas passages are formed with a curved course, so that they have a streamlined profiling with regard to intensive fluid delivery.
  • the radius of curvature in this case can in a range from D 2/3 to 3D 2, preferably about at about D 2 / are.
  • 2 D 2 denotes the largest diameter of the dispersing device, which is measured between the outer edges of two opposing gas channel discharge openings.
  • the gas channels may have a cross-section which, starting from the hollow shaft, becomes larger towards the gas channel opening.
  • each gas channel mouth opening lies in a plane at an acute angle to the gas channel wall, which preferably lies in a range of 30 ° to 60 ° and is in particular about 50 °.
  • the gas passages are arranged at regular angular intervals in the circumferential direction in order to ensure as uniform a mixing of gas and liquid as possible in the circumferential direction.
  • the gas channel orifices are directed against the direction of rotation of the hollow shaft, so that the intensive mixing of gas and liquid takes place at the outflow region of the gas channels.
  • FIG. 1 shows a perspective view of a self-priming rotating dispersing device, indicated as a whole by 1, or a self-priming two-phase turbine.
  • the dispersing device 1 has a central hollow shaft 2, which is driven via a rotary drive not shown in the direction indicated by the arrow rotation direction.
  • gas or gas to be dispersed is sucked.
  • gas channels 3 With the limited by the hollow shaft 2 interior are a plurality of circumferentially preferably arranged at regular angular intervals gas channels 3 in communicating connection, which have gas duct openings 4, which are directed counter to the direction of rotation of the hollow shaft 2 in the illustrated example.
  • a cover disk 5, 6 is respectively arranged in the dispersing device 1.
  • the lower-side cover plate 6 forms a closed surface and is fixedly connected to the outer wall of the hollow shaft 2 and the corresponding outer surface of the gas channels 3.
  • the upper-side cover plate 5 is formed as an annular body and surrounds the hollow shaft 2 concentrically and forms between the outer wall of the hollow shaft 2 an annular gap 7, which serves for remplisstechniksansaugung in between the two cover plates 5 and 6 and the gas channels 3 chambers 8.
  • the cover plates 5 and 6 may be integrally connected to the gas channels 3 accordingly.
  • the largest outer diameter of the dispersing device 1 is denoted by D 2 and is measured between the outer edges of two opposing gas channel mouths.
  • a negative pressure is generated by the stall at the gas channel openings 4, through which gas is drawn in from the gas space and the gas channels 3 against the static liquid level above the dispersing device 1.
  • This aspirated and to be dispersed gas is discharged within the dispersing device 1 in a conduit system without mixing with liquid through the gas channel openings 4 and there is a mixing of dispersing gas and liquid outside of the dispersing device 1 in the area around the gas channel openings 4.
  • Die Gaskanäle 3 effect during the rotation of the hollow shaft 2 an intensive fluid delivery and agitation also in cooperation with the chambers 8.
  • the gas channels 3 have a curved course and have a shape similar to a paddle.
  • the radius of curvature is in a range E 2/3 to 3D 2, preferably at about D 2/2.
  • the gas passages 3 have a cross-section which, starting from the connection with the hollow shaft 2, increases in the gas flow direction. As a result, the mass transfer from gas to liquid can be further enhanced. Also, furthermore, favorable material transfer ratios are still obtained by directing the gas channel gas channel openings 4 counter to the direction of rotation of the hollow shaft 2.
  • the gas channels 3 ' have a straight course and extend at an acute angle ⁇ to the radial.
  • This acute angle ⁇ is preferably in a range of greater than 0 and less than 25 ° and is preferably about 15 °.
  • the opening cross section of each gas channel opening 4 is in a plane at an acute angle ⁇ to the gas channel wall, which is preferably within an angular range of 30 ° to 60 ° and in particular is about 50 °.
  • the dispersing device according to Figure 3 also has in the circumferential direction at regular angular intervals arranged gas channels 3 ", which have a rectilinear profile similar to Figure 2 and have a cross-section, which is larger, starting from the hollow shaft 2 to the gas channel-mouth opening 4.
  • all other details of the dispersing device 1 shown in FIG. 3 essentially correspond to those which were explained above in connection with FIG.
  • FIG. 4 shows a further embodiment variant in the form of a modification with respect to the embodiment of the dispersing device 1 according to FIG. 3.
  • the gas passages 3 "'in the hollow interior of the hollow shaft 2 have a substantially constant cross section over their entire course
  • the gas channels 3 "' also extend substantially radially to the hollow shaft 2 and each have an opening cross-section in the region of the gas channel opening 4 in a plane at an acute angle ⁇ to Gaskanalwandung.
  • Combinations of differently configured gas ducts with a correspondingly different arrangement to the hollow shaft are also possible, and in particular also combined progressions of rectilinear and curved into consideration, as well as combinations with graduated extending cross sections of the gas ducts.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Dowels (AREA)
  • Coating Apparatus (AREA)
  • Nozzles (AREA)
  • Catching Or Destruction (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The rotary dispersal turbine has a rotating hollow shaft (2) which operates as the gas inlet. Gas flows from the hollow shaft through radial passages (3) to the peripheral gas outlets (4) which rotate within the liquid.

Description

Die Erfindung befaßt sich mit einer selbstansaugenden, rotierbaren Dispergiervorrichtung für Gase und Flüssigkeiten oder einer selbstansaugenden Zweiphasenturbine zur Durchmischung von Gasen und Flüssigkeiten nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a self-priming, rotatable dispersing device for gases and liquids or a self-priming two-phase turbine for mixing gases and liquids according to the preamble of patent claim 1.

Eine derartige selbstansaugende, rotierbare Dispergiervorrichtung des vorstehend genannten Art ist aus GB 724791A bekannt.Such a self-priming, rotatable dispersing device of the aforementioned kind is known from GB 724791A.

Bei Dispergiervorrichtungen oder selbstansaugenden Zweiphasenturbinen anderer Bauart erfolgt die Gasansaugung über die drehangetriebene Hohlwelle und in den Innenraum der Turbine wird auch Flüssigkeit eingeleitet, so daß die Durchmischung von Gas und Flüssigkeit innerhalb des Turbinenraums erfolgt. Eine solche selbstansaugende Zweiphasenturbine arbeitet bis zu einem Phasenverhältnis Gas/Flüssigkeit von etwa 25/30 % zufriedenstellend. Bei größeren Phasenverhältnissen ist die selbstansaugende Zweiphasenturbine überflutet und selbst bei einer Drehzahlsteigerung ist kein höherer Leistungseintrag mehr möglich, da die angesaugte Gasmenge in Ruhe verharrt und ein höherer Stoffübergang nicht mehr möglich ist. Daher ist bei einer solchen üblichen selbstansaugenden Zweiphasenturbine bauart bedingt der Stoffübergang durch das vorgegebene Phasenverhältnis Gas/Flüssigkeit beschränkt.In dispersing devices or self-priming two-phase turbines of a different type, the gas suction takes place via the rotationally driven hollow shaft and liquid is introduced into the interior of the turbine, so that the thorough mixing of gas and liquid takes place within the turbine space. Such a self-priming two-phase turbine operates satisfactorily up to a gas / liquid phase ratio of about 25/30%. At higher phase ratios, the self-priming two-phase turbine is flooded and even with a speed increase no higher power input is no longer possible because the sucked gas remains at rest and a higher mass transfer is no longer possible. Therefore, in such a conventional self-priming two-phase turbine, the mass transfer is limited by the predetermined gas / liquid phase ratio.

Aus EP-A 0 021 470 ist eine Dispergiervorrichtung bekannt, bei der die Gaskänäle unter einem spitzen Winkel zur Radialen verlaufen und oberseitig ein Flüssigkeitsansangspalt im Zusammenwirken mit der Außenfläche der Hohlwelle gebildet wird.From EP-A 0 021 470 a dispersing device is known, in which the gas channels extend at an acute angle to the radial and on the upper side a Flüssigkeitsansangspalt is formed in cooperation with the outer surface of the hollow shaft.

Die Erfindung zielt daher darauf ab, unter Überwindung der zuvor geschilderten Schwierigkeiten eine leistungsstarke, selbstansaugende Dispergiervorrichtung für Gase und Flüssigkeiten bzw. Zweiphasenturbine bereitzustellen, welche einen höheren Stoffübergang bei möglichst günstigen Leistungs-/Eintragsverhältnissen und Drehzahl der Dispergiervorrichtung gestattet.The invention therefore aims to provide a powerful, self-priming dispersing device for gases and liquids or two-phase turbine, overcoming the difficulties described above, which allows a higher mass transfer at the lowest possible power / entry ratios and speed of the dispersing.

Nach der Erfindung wird hierzu eine selbstansaugende, rotierbare Dispergiervorrichtung für Gase und Flüssigkeiten bereitgestellt deren Merkmale im Patentanspruch 1 angegeben sind.According to the invention for this purpose a self-priming, rotatable dispersing device for gases and liquids is provided whose features are specified in claim 1.

Bei der erfindungsgemäßen, selbstansaugenden rotierbaren Dispergiervorrichtung sind daher mehrere Gaskanäle mit der Hohlwelle verbunden, die über Gaskanal-Mündungsöffnungen eine Ausleitung des zu dispergierenden Gases gestatten. An den Gaskanal-Mündungsöffnungen wird durch den Strömungsabriß ein Unterdruck erzeugt, welcher ermöglicht, daß das Gas aus dem Gasraum entgegen der statischen Flüssigkeitshöhe über der Dispergiervorrichtung angesaugt wird. Somit wird eine ständige Gasansaugung bei der erfindungsgemäßen Dispergiervorrichtung unabhängig von dem Phasenverhältnis Gas/Flüssigkeit aufgrund der Strömungsabrißerscheinung an der Gaskanal-Mündungsöffnung gewährleistet. Ferner erfolgt bei der erfindungsgemäßen Dispergiervorrichtung die Vermischung von Gas und Flüssigkeit außerhalb des Innenraums der Dispergiervorrichtung, nämlich in dem Bereich der Gaskanal-Mündungsöffnungen, da die bei der erfindungsgemäßen Dispergiervorrichtung vorgesehenen Gaskanäle nur zu dispergierendes Gas und keine Flüssigkeit führen. Bei der Drehbewegung der Dispergiervorrichtung erzeugen die Gaskanäle ferner eine intensive Flüssigkeitsförderung, Flüssigkeitsbewegung und Flüssigkeitsumwälzung, so daß man einen hohen Stoffübergang durch die intensive Kontaktierung der bewegten Flüssigkeit mit dem angesaugten und dispergierten Gas erreicht.In the self-priming rotatable dispersing device according to the invention, therefore, a plurality of gas passages are connected to the hollow shaft, which allow a discharge of the gas to be dispersed via gas passage orifices. At the gas channel openings a negative pressure is generated by the stall, which allows the gas from the gas space is sucked against the static liquid level above the dispersing device. Thus, a continuous gas suction in the dispersing device according to the invention is ensured regardless of the phase ratio gas / liquid due to the stall at the gas duct mouth opening. Furthermore, in the dispersing device according to the invention, the mixing of gas and liquid takes place outside the interior of the dispersing device, namely in the region of the gas channel openings, since the gas channels provided in the dispersing device according to the invention only lead to dispersing gas and no liquid. During the rotary movement of the dispersing device, the gas channels also generate an intensive fluid delivery, liquid movement and fluid circulation, so that one reaches a high mass transfer by the intensive contacting of the moving liquid with the sucked and dispersed gas.

Ferner ist bei der selbstansaugenden, rotierbaren Dispergiervorrichtung nach der Erfindung oberseitig und unterseitig der Gaskanäle eine Deckscheibe vorgesehen, welche axial zur drehangetriebenen Hohlwelle beabstandet sind und zwischen denen im Zusammenwirken mit den Gaskanälen, Kammern gebildet werden. Die unterseitige Deckscheibe bildet hierbei eine geschlossene und mit der Hohlwelle verbundene Fläche. Die oberseitige Deckscheibe bildet einen Flüssigkeits-Ansaugspalt im Zusammenwirken mit der Außenfläche der Hohlwelle. Über diesen Ansaugspalt wird Flüssigkeit in die Kammern zwischen den beiden axial beabstandeten Deckscheiben und den Außenflächen der Gaskanäle eingeleitet, der eine intensive Agitationsbewegung zur Verstärkung des Stoffübergangs erteilt wird.Furthermore, in the self-priming, rotatable dispersing device according to the invention, a cover disk is provided on the upper side and underside of the gas ducts, which are axially spaced from the rotationally driven hollow shaft and between which chambers are formed in cooperation with the gas ducts. The underside cover forms a closed surface connected to the hollow shaft. The upper-side cover disc forms a liquid-suction gap in cooperation with the outer surface of the hollow shaft. Liquid is introduced into the chambers between the two axially spaced shrouds and the outer surfaces of the gas passages via this suction gap, which is given an intense agitation movement to enhance the mass transfer.

Durch die getrennte Führung des zu dispergierenden Gases innerhalb der selbstansaugenden Dispergiervorrichtung nach der Erfindung ist daher die Dispergiervorrichtung nach der Erfindung keinen Beschränkungen durch vorbestimmte Phasenverhältnisse Gas/Flüssigkeit unterworfen. Somit erhält man nach der Erfindung eine äußerst leistungsfähige und einen hohen Stoffübergang verwirklichende selbstansaugende, rotierende Dispergiervorrichtung bzw. selbstansaugende Zweiphasenturbine.Due to the separate guidance of the gas to be dispersed within the self-priming dispersing device according to the invention, therefore, the dispersing device according to the invention is not subject to any restrictions by predetermined gas / liquid phase ratios. Thus, according to the invention, an extremely high-performance self-priming, rotating dispersing device or self-aspirating two-phase turbine achieving high mass transfer is obtained.

Eine weitere Leistungssteigerung einer solchen selbstansaugenden Dispergiervorrichtung und weitere Verbesserungen hinsichtlich des Wirkungsgrades lassen sich durch entsprechende Gestaltungen der Gaskanäle verwirklichen. Hierfür gibt es zahlreiche Möglichkeiten.A further increase in performance of such a self-priming dispersing device and further improvements in terms of efficiency can be realized by appropriate designs of the gas channels. There are many possibilities for this.

Bei einer Ausführungsform verlaufen die Gaskanäle etwa radial zur Hohlwelle. Alternativ können die Gaskanäle unter einem spitzen Winkel zur Radialen verlaufen, welcher vorzugsweise in einem Bereich von größer 0 und kleiner 25° liegt und insbesondere etwa 15° beträgt.In one embodiment, the gas passages extend approximately radially to the hollow shaft. Alternatively, the gas channels may extend at an acute angle to the radial, which is preferably in a range of greater than 0 and less than 25 °, and in particular approximately 15 °.

Weiterhin können die Gaskanäle in Form von Rührflügeln ausgebildetwerden, um die Flüssigkeitsförderung hierdurch zu intensivieren.Furthermore, the gas passages may be formed in the form of agitating blades to intensify fluid delivery therethrough.

Vorzugsweise sind bei der selbstansaugenden, rotierenden Dispergiervorrichtung nach der Erfindung die Gaskanäle mit einem gekrümmten Verlauf ausgebildet, so daß sie eine strömungsgünstige Profilierung hinsichtlich einer intensiven Flüssigkeitsförderung haben. Der Krümmungsradius hierbei kann in einem Bereich von D2/3 bis 3D2, vorzugsweise etwa bei etwa D2/2 liegen. Mit D2 ist der größte Durchmesser der Dispergiervorrichtung bezeichnet, welcher zwischen den Außenkanten von zwei gegenüberliegenden Gaskanalmündungsöffnungen gemessen wird.Preferably, in the self-priming rotating dispersing device according to the invention, the gas passages are formed with a curved course, so that they have a streamlined profiling with regard to intensive fluid delivery. The radius of curvature in this case can in a range from D 2/3 to 3D 2, preferably about at about D 2 / are. 2 D 2 denotes the largest diameter of the dispersing device, which is measured between the outer edges of two opposing gas channel discharge openings.

Insbesondere können die Gaskanäle einen Querschnitt haben, welcher ausgehend von der Hohlwelle zur Gaskanalmündungsöffnung größer wird. Hierdurch läßt sich die Ansaugung von Gas aus dem Gasraum aufgrund der Strömungsabrißerscheinung und des hierdurch erzeugten Unterdrucks im Gaskanalsystem verstärken.In particular, the gas channels may have a cross-section which, starting from the hollow shaft, becomes larger towards the gas channel opening. As a result, the suction of gas from the gas space due to the stall phenomenon and the resulting negative pressure in the gas duct system can be amplified.

Insbesondere liegt der Öffnungsquerschnitt jeder Gaskanal-Mündungsöffnung in einer Ebene unter einem spitzen Winkel zur Gaskanalwandung, welcher vorzugsweise in einem Bereich von 30° bis 60° liegen und insbesondere etwa 50° beträgt. Hierdurch läßt sich der Stoffübergang aufgrund der vergrößerten Kontaktflächen noch weiter verbessern.In particular, the opening cross-section of each gas channel mouth opening lies in a plane at an acute angle to the gas channel wall, which preferably lies in a range of 30 ° to 60 ° and is in particular about 50 °. As a result, the mass transfer due to the enlarged contact surfaces can be further improved.

Gemäß einer bevorzugten Ausführungsform der selbstansaugenden, rotierenden Dispergiervorrichtung sind die Gaskanäle in regelmäßigen Winkelabständen in Umfangsrichtung angeordnet, um eine möglichst in Umfangsrichtung gleichförmige Durchmischung von Gas und Flüssigkeit zu gewährleisten.According to a preferred embodiment of the self-priming, rotating dispersing device, the gas passages are arranged at regular angular intervals in the circumferential direction in order to ensure as uniform a mixing of gas and liquid as possible in the circumferential direction.

Vorzugsweise sind die Gaskanal-Mündungsöffnungen entgegen der Drehrichtung der Hohlwelle gerichtet, so daß die intensive Durchmischung von Gas und Flüssigkeit an dem strömungsabgewandten Bereich der Gaskanäle erfolgt.Preferably, the gas channel orifices are directed against the direction of rotation of the hollow shaft, so that the intensive mixing of gas and liquid takes place at the outflow region of the gas channels.

Die Erfindung wird nachstehend an Hand von bevorzugten Ausführungsformen unter Bezugnahme auf die beigefügte Zeichnung näher erläutert. Darin zeigt:

Fig. 1
eine schematische perspektivische Ansicht einer ersten Ausführungsform einer selbstansaugenden, rotierenden Dispergiervorrichtung oder einer selbstansaugenden Zweiphasenturbine nach der Erfindung,
Fig. 2
eine schematische Draufsicht auf eine Ausführungsvariante einer Dispergiervorrichtung nach der Erfindung,
Fig. 3
eine schematische Draufsicht auf eine weitere Ausführungsvariante einer Dispergiervorrichtung nach der Erfindung, und
Fig. 4
eine schematische Draufsicht auf eine weitere Ausführungsform einer Dispergiervorrichtung nach der Erfindung.
The invention will be explained below with reference to preferred embodiments with reference to the accompanying drawings. It shows:
Fig. 1
a schematic perspective view of a first embodiment of a self-priming, rotating dispersing device or a self-priming two-phase turbine according to the invention,
Fig. 2
a schematic plan view of an embodiment of a dispersing device according to the invention,
Fig. 3
a schematic plan view of a further embodiment of a dispersing device according to the invention, and
Fig. 4
a schematic plan view of a further embodiment of a dispersing device according to the invention.

In Figur 1 ist in einer perspektivischen Ansicht eine insgesamt mit 1 bezeichnete selbstansaugende, rotierende Dispergiervorrichtung oder eine selbstansaugende Zweiphasenturbine gezeigt. Die Dispergiervorrichtung 1 weist eine zentrale Hohlwelle 2 auf, welche über einen nicht näher dargestellten Drehantrieb in die mit dem Pfeil angedeutete Drehrichtung angetrieben wird. In den von der Hohlwelle 2 gebildeten Hohlraum wird Gas oder zu dispergierendes Gas angesaugt. Mit dem durch die Hohlwelle 2 begrenzten Innenraum stehen mehrere in Umfangsrichtung vorzugsweise in regelmäßigen Winkelabständen angeordnete Gaskanäle 3 in kommunizierender Verbindung, welche Gaskanal-Mündungsöffnungen 4 haben, die bei dem dargestellten Beispiel entgegen der Drehrichtung der Hohlwelle 2 gerichtet sind. Oberseitig und unterseitig ist bei der Dispergiervorrichtung 1 jeweils eine Deckscheibe 5, 6 angeordnet. Die unterseitige Deckscheibe 6 bildet eine geschlossene Fläche und ist mit der Außenwand der Hohlwelle 2 und den entsprechenden Außenfläche der Gaskanäle 3 fest verbunden. Die oberseitige Deckscheibe 5 ist als Ringkörper ausgebildet und umgibt die Hohlwelle 2 konzentrisch und bildet zwischen der Außenwand der Hohlwelle 2 einen Ringspalt 7, welcher zur Flüssigkeitsansaugung in die zwischen den beiden Deckscheiben 5 und 6 und die Gaskanäle 3 begrenzten Kammern 8 dient. Die Deckscheiben 5 und 6 können integral mit den Gaskanälen 3 entsprechend verbunden sein. Der größte Außendurchmesser der Dispergiervorrichtung 1 ist mit D2 bezeichnet und wird zwischen den Außenkanten von zwei gegenüberliegenden Gaskanalmündungsöffnungen gemessen.FIG. 1 shows a perspective view of a self-priming rotating dispersing device, indicated as a whole by 1, or a self-priming two-phase turbine. The dispersing device 1 has a central hollow shaft 2, which is driven via a rotary drive not shown in the direction indicated by the arrow rotation direction. In the cavity formed by the hollow shaft 2 gas or gas to be dispersed is sucked. With the limited by the hollow shaft 2 interior are a plurality of circumferentially preferably arranged at regular angular intervals gas channels 3 in communicating connection, which have gas duct openings 4, which are directed counter to the direction of rotation of the hollow shaft 2 in the illustrated example. On the upper side and underside, a cover disk 5, 6 is respectively arranged in the dispersing device 1. The lower-side cover plate 6 forms a closed surface and is fixedly connected to the outer wall of the hollow shaft 2 and the corresponding outer surface of the gas channels 3. The upper-side cover plate 5 is formed as an annular body and surrounds the hollow shaft 2 concentrically and forms between the outer wall of the hollow shaft 2 an annular gap 7, which serves for Flüssigkeitsansaugung in between the two cover plates 5 and 6 and the gas channels 3 chambers 8. The cover plates 5 and 6 may be integrally connected to the gas channels 3 accordingly. The largest outer diameter of the dispersing device 1 is denoted by D 2 and is measured between the outer edges of two opposing gas channel mouths.

Bei der erfindungsgemäßen Dispergiervorrichtung 1 wird durch den Strömungsabriß an den Gaskanal-Mündungsöffnungen 4 ein Unterdruck erzeugt, durch welchen Gas aus dem Gasraum und den Gaskanälen 3 entgegen der statischen Flüssigkeitshöhe über der Dispergiervorrichtung 1 angesaugt wird. Dieses angesaugte und zu dispergierende Gas wird innerhalb der Dispergiervorrichtung 1 in einem Leitungssystem ohne Vermischung mit Flüssigkeit über die Gaskanal-Mündungsöffnungen 4 ausgeleitet und es erfolgt eine Vermischung von zu dispergierendem Gas und Flüssigkeit außerhalb der Dispergiervorrichtung 1 im Bereich um die Gaskanal-Mündungsöffnungen 4. Die Gaskanäle 3 bewirken bei der Drehbewegung der Hohlwelle 2 eine intensive Flüssigkeitsförderung und Agitation auch im Zusammenwirken mit den Kammern 8. Somit wird ein intensiver Kontakt zwischen dem über die Gaskanal-Mündungsöffnungen 4 austretenden, über die Hohlwelle 2 selbstangesaugten Gas und der intensiv bewegten Flüssigkeit um die Gaskanal-Mündungsöffnungen 4 erreicht. Hierdurch erhält man einen hohen Stoffübergang bei der erfindungsgemäßen Dispergiervorrichtung 1.In the dispersing device 1 according to the invention, a negative pressure is generated by the stall at the gas channel openings 4, through which gas is drawn in from the gas space and the gas channels 3 against the static liquid level above the dispersing device 1. This aspirated and to be dispersed gas is discharged within the dispersing device 1 in a conduit system without mixing with liquid through the gas channel openings 4 and there is a mixing of dispersing gas and liquid outside of the dispersing device 1 in the area around the gas channel openings 4. Die Gaskanäle 3 effect during the rotation of the hollow shaft 2 an intensive fluid delivery and agitation also in cooperation with the chambers 8. Thus, an intense contact between the exiting via the gas channel openings 4, via the hollow shaft 2 self-sucked gas and the intensively moved liquid to the Gas duct openings 4 reached. This results in a high mass transfer in the dispersing device 1 according to the invention.

Bei der in Figur 1 dargestellten Ausführungsform der Dispergiervorrichtung 1 haben die Gaskanäle 3 einen gekrümmten Verlauf und haben eine rührflügelähnliche Gestalt. Hierdurch kann die Flüssigkeitsförderung weiter verstärkt werden. Der Krümmungsradius liegt in einem Bereich D2/3 bis 3D2, vorzugsweise bei etwa D2/2.In the embodiment of the dispersing device 1 shown in FIG. 1, the gas channels 3 have a curved course and have a shape similar to a paddle. As a result, the fluid delivery can be further enhanced. The radius of curvature is in a range E 2/3 to 3D 2, preferably at about D 2/2.

Wie ebenfalls aus Figur 1 zu ersehen ist, haben die Gaskanäle 3 einen Querschnitt, welcher ausgehend von der Anschlußverbindung mit der Hohlwelle 2 in Gasströmungsrichtung größer wird. Hierdurch läßt sich der Stoffübergang von Gas zu Flüssigkeit noch weiter verstärkten. Auch erhält man femer noch dadurch günstige Stoffübergangsverhältnisse, daß die GaskanalGaskanal-Mündungsöffnungen 4 entgegen der Drehrichtung der Hohlwelle 2 gerichtet sind.As can likewise be seen from FIG. 1, the gas passages 3 have a cross-section which, starting from the connection with the hollow shaft 2, increases in the gas flow direction. As a result, the mass transfer from gas to liquid can be further enhanced. Also, furthermore, favorable material transfer ratios are still obtained by directing the gas channel gas channel openings 4 counter to the direction of rotation of the hollow shaft 2.

Bei der Ausführungsform der in Figur 2 dargestellten Dispergiervorrichtung 1 sind im wesentlichen die Grundkonstruktionselemente übereinstimmend mit der Ausführungsform nach Figur 1 ausgelegt. Diese Teile werden daher nachstehend nicht nochmals näher erläutert, sondern lediglich die Unterschiede gegenüber der Ausgestaltung nach Figur 1.lm wesentlichen haben nur die Gaskanäle 3' eine von Figur 1 abweichende Ausgestaltungsform.In the embodiment of the dispersing device 1 shown in FIG. 2, essentially the basic construction elements are designed in accordance with the embodiment according to FIG. These parts will therefore not be explained again in more detail below, but only the differences from the embodiment according to Figure 1.lm essentially only the gas channels 3 'have a different from Figure 1 embodiment.

Wie aus Figur 2 zu ersehen ist, haben die Gaskanäle 3' einen geradlinigen Verlauf und verlaufen unter einem spitzen Winkel α zur Radialen. Dieser spitze Winkel α liegt vorzugsweise in einem Bereich von größer 0 und kleiner 25° und beträgt vorzugsweise etwa 15°. Auch diese Gaskanäle 3' haben wie in Figur 1 einen Querschnitt, welcher ausgehend von der Hohlwelle 2 zur Gaskanal-Mündungsöffnung 4 größer wird. Der Öffnungsquerschnitt jeder Gaskanal-Mündungsöffnung 4 liegt in einer Ebene unter einem spitzen Winkel β zur Gaskanalwandung, welcher vorzugsweise innerhalb eines Winkelbereiches von 30° bis 60° liegt und insbesondere etwa 50° beträgt.As can be seen from Figure 2, the gas channels 3 'have a straight course and extend at an acute angle α to the radial. This acute angle α is preferably in a range of greater than 0 and less than 25 ° and is preferably about 15 °. These gas channels 3 'have, as in Figure 1, a cross section which, starting from the hollow shaft 2 to the gas duct mouth opening 4 is larger. The opening cross section of each gas channel opening 4 is in a plane at an acute angle β to the gas channel wall, which is preferably within an angular range of 30 ° to 60 ° and in particular is about 50 °.

Die Dispergiervorrichtung nach Figur 3 weist ebenfalls in umfangsrichtung in regelmäßigen Winkelabständen angeordnete Gaskanäle 3" auf, welche ähnlich wie bei Figur 2 einen geradlinigen Verlauf haben sowie einen Querschnitt besitzen, welcher ausgehend von der Hohlwelle 2 zur Gaskanal-Mündungsöffnung 4 größer wird. Auch ist der Öffnungsquerschnitt jeder Gaskanal-Mündungsöffnung 4 in einer Ebene unter einem spitzen Winkel β zur Gaskanalwandung angeordnet, welcher vorzugsweise in einem Bereich von 30° bis 60° liegt und insbesondere etwa 50° beträgt. In Abweichung von der Ausführungsform nach Abbildung 2 verlaufen aber die Gaskanäle 3" etwa radial zur Hohlwelle 2. Ansonsten stimmen alle weiteren Einzelheiten der in Figur 3 gezeigten Dispergiervorrichtung 1 im wesentlichen mit jenen überein, welche im Zusammenhang mit Figur 1 zuvor erläutert wurden.The dispersing device according to Figure 3 also has in the circumferential direction at regular angular intervals arranged gas channels 3 ", which have a rectilinear profile similar to Figure 2 and have a cross-section, which is larger, starting from the hollow shaft 2 to the gas channel-mouth opening 4. Auch ist Opening cross-section of each gas channel-mouth opening 4 arranged in a plane at an acute angle β to Gaskanalwandung, which is preferably in a range of 30 ° to 60 ° and in particular about 50 ° Otherwise, all other details of the dispersing device 1 shown in FIG. 3 essentially correspond to those which were explained above in connection with FIG.

Figur 4 zeigt eine weitere Ausführungsvariante in Form einer Abwandlung gegenüber der Ausführungsform der Dispergiervorrichtung 1 nach Figur 3. In Abweichung hiervon haben die in dem hohlen Innenraum der Hohlwelle 2 in kommunizierender Verbindung stehenden Gaskanäle 3"' einen im wesentlichen konstanten Querschnitt über ihren gesamten Verlauf hinweg ausgehend von der Hohlwelle 2 bis zur Gaskanal-Mündungsöffnung 4. Ansonsten verlaufen die Gaskanäle 3"' ebenfalls im wesentlichen radial zur Hohlwelle 2 und besitzen jeweils einen Öffnungsquerschnitt im Bereich der Gaskanal-Mündungsöffnung 4 in einer Ebene unter einem spitzen Winkel β zur Gaskanalwandung.FIG. 4 shows a further embodiment variant in the form of a modification with respect to the embodiment of the dispersing device 1 according to FIG. 3. In a departure therefrom, the gas passages 3 "'in the hollow interior of the hollow shaft 2 have a substantially constant cross section over their entire course Otherwise, the gas channels 3 "'also extend substantially radially to the hollow shaft 2 and each have an opening cross-section in the region of the gas channel opening 4 in a plane at an acute angle β to Gaskanalwandung.

Auch sind Kombinationen von unterschiedlich ausgestalteten Gaskanälen mit entsprechend unterschiedlicher Anordnung zur Hohlwelle möglich, wobei insbesondere auch kombinierte Verläufe von geradlinig und gekrümmt in Betracht kommen sowie auch Kombinationen mit abgestuft verlaufenden Querschnitten der Gaskanäle.Combinations of differently configured gas ducts with a correspondingly different arrangement to the hollow shaft are also possible, and in particular also combined progressions of rectilinear and curved into consideration, as well as combinations with graduated extending cross sections of the gas ducts.

Claims (9)

  1. Self-aspirating, rotatable dispersing device for gas and liquids having a rotary-driven hollow shaft (2) for gas aspiration, in which the gas to be dispersed may flow from the hollow shaft (2) via gas channels (3,3', 3", 3"') connected to communicate therewith, separately from the liquid to peripherally spaced gas channel openings (4), at which mixing of gas and liquid may take place outside the dispersing device (1), and in which a cover disk (5, 6) is provided on the upper side and lower side of the gas channels (3, 3', 3", 3'"), characterised by the upper-side cover disk (5) forming a liquid aspirating gap (7) in conjunction with the outer surface of the hollow shaft (2), the lower side cover disk (6) forming a closed surface connected to the outer surface of the hollow shaft (2), and in which chambers (8) connected to the liquid aspirating gap (7) are formed between the two cover disks (5, 6) and the gas channels (3,3', 3", 3"'), such that the gas channel openings (9) face in the opposite direction to the direction of rotation of the hollow shaft (2) and vent outside the circumference of the cover disc.
  2. Self-aspirating, rotatable dispersing device according to claim 1, characterised by the gas channels (3", 3'") running approximately radially to the hollow shaft (2).
  3. Self aspirating, rotatable dispersing device according to claim 1 characterised by the gas channels (3') running at an acute angle (α) to the radius, which preferably lies within a range from greater than 0° to less than 25°, and particularly around 15°.
  4. Self-aspirating, rotatable dispersing device according to one of claims 1 to 3, characterised by the gas channels (3, 3', 3", 3''') being designed in the form of agitator blades.
  5. Self-aspirating, rotatable dispersing device according to one of the preceding claims, characterised by the gas channels (3) having a curved path.
  6. Self-aspirating, rotatable dispersing device according to claim 5, characterised by the radius of curvature lying within the range of D2/3 to 3D2, preferably at about D2/2, where D2 is the greatest diameter between the outer edges of the two opposing gas channel openings
  7. Self-aspirating, at rotatable dispersing device according to one of the preceding claims, characterised by the gas channels (3, 3', 3") having a cross-section, which becomes greater starting from the hollow shaft (2) towards the gas channel opening (4).
  8. Self-aspirating, rotatable dispersing device according to one of the preceding claims, characterised by the opening cross-section of each gas channel opening (4) being arranged in a plane at an acute angle (β) to the gas channel wall, which preferably lies within a range of 30° to 80°, particularly at around 60°.
  9. Self-aspirating, rotatable dispersing device according to one of the above claims, characterised by the gas channels (3, 3', 3", 3"') being arranged at regular angular intervals on the periphery.
EP99120397A 1998-10-13 1999-10-13 Self-sucking rotatable dispersing device Expired - Lifetime EP0993862B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29818255U 1998-10-13
DE29818255U DE29818255U1 (en) 1998-10-13 1998-10-13 Self-priming, rotating dispersing device

Publications (3)

Publication Number Publication Date
EP0993862A1 EP0993862A1 (en) 2000-04-19
EP0993862B1 EP0993862B1 (en) 2003-06-04
EP0993862B2 true EP0993862B2 (en) 2006-12-27

Family

ID=8063844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99120397A Expired - Lifetime EP0993862B2 (en) 1998-10-13 1999-10-13 Self-sucking rotatable dispersing device

Country Status (5)

Country Link
US (1) US6394430B1 (en)
EP (1) EP0993862B2 (en)
AT (1) ATE242043T1 (en)
DE (2) DE29818255U1 (en)
DK (1) DK0993862T4 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6568661B1 (en) * 2001-05-03 2003-05-27 Tomco2 Equipment Co. Diffuser for use in a carbonic acid control system
US8056886B2 (en) * 2007-01-02 2011-11-15 Jet Inc. Aspirator
JP5367567B2 (en) * 2007-05-18 2013-12-11 株式会社帝国電機製作所 Dispersing stirrer and dispersing tank
JP5132243B2 (en) * 2007-10-17 2013-01-30 株式会社鶴見製作所 Underwater aeration equipment
US7997788B2 (en) * 2007-10-25 2011-08-16 Midan Industries Ltd. Submersible mixing propeller
US20090213684A1 (en) * 2007-10-25 2009-08-27 Midan Industries Ltd. Apparatus for distribution of a gas into a body of liquid
BR112016006329A2 (en) 2013-09-27 2017-08-01 Rio Tinto Alcan Int Ltd dual function thruster for a rotary injector
USD742427S1 (en) 2013-09-27 2015-11-03 Rio Tinto Alcan International Limited Impeller for a rotary injector
USD823057S1 (en) * 2016-11-21 2018-07-17 Stephen Donaghy Vegetable cutter blade
USD823056S1 (en) * 2016-11-21 2018-07-17 Stephen Donaghy Vegetable cutter blade
USD823059S1 (en) * 2016-11-21 2018-07-17 Stephen Donaghy Vegetable cutter blade
USD823058S1 (en) * 2016-11-21 2018-07-17 Stephen Donaghy Vegetable cutter blade
USD823055S1 (en) * 2016-11-21 2018-07-17 Stephen Donaghy Vegetable cutter blade
DE102019101934A1 (en) 2019-01-25 2020-07-30 EKATO Rühr- und Mischtechnik GmbH Stirrer device
EP4094838A1 (en) * 2021-05-28 2022-11-30 Metso Outotec Finland Oy Rotor of gas dispersion arrangement
CN114272806B (en) * 2022-01-04 2022-09-06 上海银鲨机器(集团)有限公司 Double-shaft paddle mixer with directional screening function

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485484A (en) † 1966-10-20 1969-12-23 Venot Pic Sa Device for the circulation and the aeration of fluids

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1526596A (en) * 1922-06-09 1925-02-17 William E Greenawalt Apparatus for treating liquids with gases
US1579355A (en) * 1923-06-11 1926-04-06 William E Greenawalt Apparatus for treating liquids with gases
GB724791A (en) * 1952-02-02 1955-02-23 Anton Enenkel Apparatus for the aeration of liquids
BE525439A (en) * 1953-03-13
FR1361052A (en) * 1963-06-21 1964-05-15 Prep Ind Combustibles Method of introducing reagent into a foam flotation cell
US3813086A (en) * 1966-04-05 1974-05-28 Frings H Fa Device for aerating liquids
US3776531A (en) * 1972-03-16 1973-12-04 M Ebner Apparatus and propeller for entraining fluids in liquids
US3896027A (en) * 1973-06-22 1975-07-22 Kenneth A Digney Method of treating sewage to enhance aerobic decomposition
JPS5232748A (en) * 1976-09-13 1977-03-12 Janome Sewing Machine Co Ltd Buttonhole stitching unit operator for sewing machine
SU621383A1 (en) * 1977-03-05 1978-08-30 Предприятие П/Я Р-6767 Device for aeration and mixing of pulp
NO142830C (en) * 1978-02-28 1980-10-29 Trondhjems Mek Verksted As DEVICE FOR DISTRIBUTING A GAS IN A FLUID MEDIUM
JPS55104637A (en) * 1979-02-03 1980-08-11 Iwao Ozaki Self-sucking type bubble jet generator
CH645280A5 (en) * 1979-06-01 1984-09-28 Chemap Ag DEVICE FOR GASING A LIQUID.
JPS60200923A (en) * 1984-03-23 1985-10-11 Showa Alum Corp Device for fining and dispersing foam
FI81077C (en) * 1987-06-11 1990-09-10 Outokumpu Oy Aeration device for waste water from industry and buildings
US5013490A (en) * 1988-10-21 1991-05-07 Showa Aluminum Corporation Device for releasing and diffusing bubbles into liquid
CH686874A5 (en) * 1992-01-31 1996-07-31 V Zug Ag Device for introducing a gas into a liquid.
FI94317C (en) * 1992-10-16 1995-08-25 Outokumpu Mintec Oy Methods and apparatus for dispersing gas in liquid
FR2702159B1 (en) * 1993-03-05 1995-04-28 Raymond Berchotteau Apparatus for introducing and diffusing air or a gas into a liquid.
US5660766A (en) * 1995-09-22 1997-08-26 Van Dyek; Bernhard Aerator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485484A (en) † 1966-10-20 1969-12-23 Venot Pic Sa Device for the circulation and the aeration of fluids

Also Published As

Publication number Publication date
DK0993862T4 (en) 2007-05-07
ATE242043T1 (en) 2003-06-15
EP0993862B1 (en) 2003-06-04
DK0993862T3 (en) 2003-09-29
EP0993862A1 (en) 2000-04-19
DE59905813D1 (en) 2003-07-10
DE29818255U1 (en) 2000-02-17
US6394430B1 (en) 2002-05-28

Similar Documents

Publication Publication Date Title
EP0993862B2 (en) Self-sucking rotatable dispersing device
EP0516921B1 (en) Gasing stirrer
DE10060152B4 (en) Air powered rotary and cutting device for use in medical and dental procedures
DE69608694T2 (en) SUBMERSIBLE MIXER
EP2613871B1 (en) Stirrer
DE69105845T2 (en) Vacuum cleaner blower with impeller.
DE2745538A1 (en) STIRRER, ESPECIALLY FOR AGRICULTURAL USE FOR THE TREATMENT OF JACH
EP0204688B2 (en) Aerating device for liquids
DE1964308C3 (en) Device for gassing and circulating liquids
DE2414610C3 (en) Cross-flow fan
DE3415366C2 (en)
EP1854525B1 (en) Filtering device
DE1161481B (en) Device for stabilizing the characteristics of centrifugal machines with an axially flowed impeller
DE1528682B2 (en) CENTRIFUGAL PUMP KIT
EP0947472A1 (en) Gyroscope-aerator
DE19905141B4 (en) Vertical water jet propulsion device
DE3621903C2 (en)
DE2437001A1 (en) RADIAL FAN
DE2733066A1 (en) COMPRESSED GAS TURBINE
DE60303788T2 (en) Self-priming centrifugal pump
DE3207448C2 (en) Fan arrangement for an externally ventilated electrical machine
DE19834012C2 (en) Centrifugal pump with mechanical seal
DE3245641A1 (en) Agitator device
DE3610527C2 (en)
DE2164359C3 (en) Surface aeration gyroscope for the introduction of air or another oxygen gas mixture into sewage or similar liquids

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20000329

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

RBV Designated contracting states (corrected)

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17Q First examination report despatched

Effective date: 20010806

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

RTI1 Title (correction)

Free format text: SELF-SUCKING ROTATABLE DISPERSING DEVICE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030604

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030604

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: OK PAT AG PATENTE MARKEN LIZENZEN

Ref country code: CH

Ref legal event code: EP

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 59905813

Country of ref document: DE

Date of ref document: 20030710

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030904

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030904

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030904

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030915

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031013

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031013

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031013

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031031

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031031

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

BERE Be: lapsed

Owner name: *EKATO RUHR- UND MISCHTECHNIK G.M.B.H.

Effective date: 20031031

26 Opposition filed

Opponent name: HEINRICH FRINGS GMBH & CO, KG

Effective date: 20040303

NLR1 Nl: opposition has been filed with the epo

Opponent name: HEINRICH FRINGS GMBH & CO, KG

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 20061227

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

GBTA Gb: translation of amended ep patent filed (gb section 77(6)(b)/1977)
REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20031014

NLR2 Nl: decision of opposition

Effective date: 20061227

NLR3 Nl: receipt of modified translations in the netherlands language after an opposition procedure
ET3 Fr: translation filed ** decision concerning opposition
REG Reference to a national code

Ref country code: DK

Ref legal event code: T4

REG Reference to a national code

Ref country code: CH

Ref legal event code: PCAR

Free format text: ALDO ROEMPLER PATENTANWALT;BRENDENWEG 11 POSTFACH 154;9424 RHEINECK (CH)

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: PATENTANWALTSKANZLEI DAUB, CH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 59905813

Country of ref document: DE

Representative=s name: DAUB, THOMAS, DIPL.-ING., DE

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

REG Reference to a national code

Ref country code: CH

Ref legal event code: PCAR

Free format text: NEW ADDRESS: POSTFACH, 8058 ZUERICH-FLUGHAFEN (CH)

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 19

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20181022

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20181025

Year of fee payment: 20

Ref country code: DE

Payment date: 20181024

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20181022

Year of fee payment: 20

Ref country code: CH

Payment date: 20181025

Year of fee payment: 20

Ref country code: FR

Payment date: 20181023

Year of fee payment: 20

Ref country code: GB

Payment date: 20181025

Year of fee payment: 20

REG Reference to a national code

Ref country code: CH

Ref legal event code: PCAR

Free format text: NEW ADDRESS: LEUTSCHENBACHSTRASSE 95, 8050 ZUERICH (CH)

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59905813

Country of ref document: DE

REG Reference to a national code

Ref country code: DK

Ref legal event code: EUP

Effective date: 20191013

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: NL

Ref legal event code: MK

Effective date: 20191012

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20191012

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20191012