DE1278409B - Device for gassing liquids - Google Patents

Device for gassing liquids

Info

Publication number
DE1278409B
DE1278409B DEW40072A DEW0040072A DE1278409B DE 1278409 B DE1278409 B DE 1278409B DE W40072 A DEW40072 A DE W40072A DE W0040072 A DEW0040072 A DE W0040072A DE 1278409 B DE1278409 B DE 1278409B
Authority
DE
Germany
Prior art keywords
wing
channel
gas
depression
hollow
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
DEW40072A
Other languages
German (de)
Inventor
Dr-Ing Heinrich Weinrich
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.)
Dr-Ing Heinrich Weinrich
Original Assignee
Dr-Ing Heinrich Weinrich
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dr-Ing Heinrich Weinrich filed Critical Dr-Ing Heinrich Weinrich
Priority to DEW40072A priority Critical patent/DE1278409B/en
Publication of DE1278409B publication Critical patent/DE1278409B/en
Pending legal-status Critical Current

Links

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
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/113—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller
    • B01F27/1133—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller the impeller being of airfoil or aerofoil type
    • 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
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1125—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Vorrichtung zum Begasen von Flüssigkeiten Die Erfindung betrifft eine Vorrichtung zum Begasen von Flüssigkeiten, bestehend aus mehreren um eine lotrechte Achse in einem Flüssigkeitsbehälter umlaufenden etwa horizontal angeordneten Flügeln mit tragflügelähnlichem Querschnitt, wobei das Gas über eine hohle Antriebswelle und/oder Laufradnabe ansaugt wird.Device for gassing liquids The invention relates to a Device for gassing liquids, consisting of several around a vertical Axis in a liquid container revolving approximately horizontally arranged wings with an airfoil-like cross-section, with the gas via a hollow drive shaft and / or the impeller hub is sucked in.

Bei der Begasung von Flüssigkeiten spielt die Intensität der Umwälzung im Hinblick auf die gute Ausnutzung des zugeführten Gases eine entscheidende Rolle. Es liegt also nahe in Verbindung mit Flüssigkeitsbegasung Umwälzpropeller zu verwenden. When liquids are fumigated, the intensity of the circulation plays a role plays a decisive role with regard to the good utilization of the supplied gas. It therefore makes sense to use a circulating propeller in conjunction with liquid gassing.

Es ist bekannt, das Gas mittels rotierender Strömungskörper der eingangs beschriebenen Art in die Flüssigkeit einzutragen. Diese sind so gestaltet, daß infolge der Geschwindigkeit, mit der sie durch die Flüssigkeit bewegt werden, an bestimmten Stellen Unterdrücke entstehen. Diese Unterdruckgebiete werden durch Öffnungen und hohle Ausführung der Strömungskörper mit dem Gasbehälter in Verbindung gebracht. Die Strömungskörper saugen also das Gas an und verteilen es in die Flüssigkeit. It is known that the gas by means of rotating flow bodies of the initially described type to be entered in the liquid. These are designed so that as a result the speed with which they are moved through the liquid Make oppressions arise. These negative pressure areas are through openings and hollow design of the flow body brought into connection with the gas container. The flow bodies thus suck in the gas and distribute it into the liquid.

Auch an den um die Antriebswelle kreisenden Flügeln zur Erzeugung der Umwälzströmung entstehen bekanntlich Unterdruckzonen, wie die in F i g. 1 graphisch aufgetragene Druckverteilung um einen Tragflügel zeigt. Es ist also vorteilhaft, diese Erscheinung unmittelbar zur Gaseintragung auszunutzen, indem in bekannter Weise die Unterdruckgebiete an den Propellerflügeln durch Öffnungen oder Schlitze sowie Kanäle mit dem Raum verbunden werden, in dem sich das Gas befindet. Also on the blades rotating around the drive shaft for generation As is known, the recirculating flow creates negative pressure zones, such as the one in FIG. 1 graphical shows applied pressure distribution around a wing. So it is beneficial to take advantage of this phenomenon directly for the introduction of gas by using in known Make the negative pressure areas on the propeller blades through openings or slots as well as ducts connected to the room in which the gas is located.

Das Gas wird in das Unterdruckgebiet gesaugt und im Anschluß an eine Berührungs- bzw. Mischungszone auf den in der Flüssigkeit herrschenden Druck verdichtet. Bei diesem Vorgang kommt es entscheidend darauf an, daß längs der gesamten Mischungsstrecke genügend Gas an den Flüssigkeitsstrahl herantreten kann. Weiterhin muß zur Vermeidung von Pendelungen des Strahles eine scharfe Ablösungskante vor den Öffnungen oder Schlitzen vorhanden sein. Ferner müssen die Stromlinien in Flügelnähe am Ende der Mischungsstrecke zunächst eine Beschleunigung erfahren, worauf sich dann erst die Verzögerungszone (Druckanstieg) anschließt. Die vorgenannten Bedingungen werden bei einer Vorrichtung der eingangs beschriebenen Gattung erfindungsgemäß dadurch erfüllt, daß die nach außen gewölbte Fläche des Flügels etwa an seiner dicksten Stelle durch eine rinnenartige Vertiefung mit im wesentlichen rechteckigem Querschnitt unterbrochen ist, welche annähernd parallel zu den Flügelkanten verläuft. The gas is sucked into the negative pressure area and following a Contact or mixing zone compressed to the pressure prevailing in the liquid. In this process, it is crucial that along the entire mixing section enough gas can reach the liquid jet. It must also be avoided a sharp separation edge in front of the openings or from oscillations of the beam Slots are present. Furthermore, the streamlines must be close to the wing at the end of the Mixing section first experience an acceleration, which is only then followed by the Followed by a delay zone (pressure increase). The aforementioned conditions will be in the case of a device of the type described at the outset, according to the invention fulfilled that the outwardly curved surface of the wing approximately at its thickest Place through a channel-like depression with a substantially rectangular cross-section interrupted is, which runs approximately parallel to the wing edges.

Einfache Öffnungen oder Schlitze in Verbindung mit einem Hohlflügel erfüllen nicht alle der obengenannten Bedingungen. Zudem neigen sie zu Verstopfungen, wenn die Gaseintragung beispielsweise in Abwasser erfolgt. Weiterhin bereitet die Herstellung eines Hohlflügels erhebliche Schwierigkeiten. Simple openings or slots in connection with a hollow wing do not meet all of the above conditions. They also tend to become constipated, if the gas is introduced into sewage, for example. Furthermore, the Manufacture of a hollow wing significant difficulties.

Bei der erfindungsgemäßen Ausführung der Propellerflügel kann die rinnenartige Vertiefung beim Gießvorgang erzielt werden, ohne daß ein Formkern vorgesehen werden muß. Sie ergibt also nicht nur die optimale physikalische Wirkung im Hinblick auf das Ziel einer energetisch günstigen Gaseintragung in Flüssigkeiten, sondern sie ermöglicht auch eine billige Herstellung der Propellerflügel.In the embodiment of the propeller blades according to the invention, the Channel-like depression can be achieved during the casting process without a mold core being provided must become. So it not only gives the optimal physical effect in terms of it on the goal of energetically favorable gas input in liquids, but it also enables the propeller blades to be manufactured cheaply.

Eine beispielsweise Ausführung der Erfindung ist in F i g. 2 dargestellt. Es handelt sich hierbei um den Querschnitt durch einen Flügel. An example embodiment of the invention is shown in FIG. 2 shown. This is the cross-section through a wing.

Die Grundform dieses Querschnitts ist gemäß der Konturlinie 1 ein Tragflügelprofil. Etwa an der dicksten Stelle befindet sich eine rinnenartige Vertiefung 2. Bezeichnet man die Flügeldicke mit d, so soll die rinnenartige Vertiefung 2 etwa im Abstand d von der Flügelvorderkante 3 verlaufen. Die Wölbung 4 zwischen der Flügelvorderkante 3 und der Rinne 2 isl in Abweichung von der normalen Tragflügelkontur 1 etwa kreisförmig oder schwach elliptisch. The basic shape of this cross section is a according to the contour line 1 Airfoil. Around the thickest point there is a channel-like depression 2. If the wing thickness is denoted by d, the channel-like depression 2 should be approximately run at a distance d from the wing leading edge 3. The bulge 4 between the wing leading edge 3 and the channel 2 is approximately circular in deviation from the normal wing contour 1 or weakly elliptical.

Die Kante 5, welche die vordere Rinnenwand 6 mit der gewölbten Fläche 4 des vorderen Flügelteiles bildet, ist scharf und nicht abgerundet. Die rückwärtige Kante 7 der Rinne 2 ist kreisförmig abgerundet.The edge 5, which the front channel wall 6 with the curved surface 4 of the front wing part is sharp and not rounded. The rear Edge 7 of the channel 2 is rounded off in a circular manner.

Die Gesamtanordnung einer Belüftungseinrichtung in Verbindung mit den oben beschriebenen Propellerflügeln zeigt F i g. 3. Die Propellerflügel 8 sind an einem Nabenkörper 9 befestigt. Die Nabe sitzt auf einer Hohlwelle 10, welche über ein Getriebe 11 von einem Motorl2 angetrieben wird. Die Rinne 2 im Flügel 8 steht über die Öffnung 13 mit der hohlen Nabe 9 in Verbindung. Die Hohlwelle 10 besitzt Öffnungen 14, die im Fall der Belüftung an einer Stelle oberhalb des Flüssigkeitsspiegels 15 angeordnet sind. The overall arrangement of a ventilation device in connection with F i g shows the propeller blades described above. 3. The propeller blades 8 are attached to a hub body 9. The hub sits on a hollow shaft 10, which is driven by a motor 12 via a transmission 11. The channel 2 in the wing 8 stands over the opening 13 with the hollow Hub 9 in connection. the Hollow shaft 10 has openings 14, which in the case of ventilation at a point above of the liquid level 15 are arranged.

Soll ein beliebiges Gas zugeführt werden, so werden die Öffnungen 14 mit einem ruhenden und gegen die Welle abgedichteten Kanal umschlossen, durch welchen das Gas herangeführt wird.If any gas is to be supplied, the openings are 14 enclosed with a resting and sealed against the shaft channel by which the gas is brought in.

Claims (5)

Patentansprüche: 1. Vorrichtung zum Begasen von Flüssigkeiten, bestehend aus mehreren um eine lotrechte Achse in einem Flüssigkeitsbehälter umlaufenden, etwa horizontal angeordneten Flügeln mit tragflügelähnlichem Querschnitt, wobei das Gas über eine hohle Antriebswelle und/oder Laufradnabe angesaugt wird, dadurch gekennzeichnet, daß die nach außen gewölbte Fläche jedes Flügels etwa an dessen dickster Stelle durch eine rinnenartige Vertiefung (2) mit im wesentlichen rechteckigem Querschnitt unterbrochen ist, welche annähernd parallel zu den Flügelkanten (3) verläuft. Claims: 1. Device for gassing liquids, consisting of several revolving around a vertical axis in a liquid container, approximately horizontally arranged wings with an airfoil-like cross-section, with the gas is sucked in via a hollow drive shaft and / or impeller hub, thereby characterized in that the outwardly curved surface of each wing approximately on it thickest point by a channel-like depression (2) with an essentially rectangular Cross-section is interrupted, which runs approximately parallel to the wing edges (3). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die rinnenartige Vertiefung (2) von der Flügelvorderkante (3) etwa um das Maß der Flügeldicke (d) entfernt ist. 2. Apparatus according to claim 1, characterized in that the channel-like Indentation (2) from the leading edge of the wing (3) by about the dimension of the wing thickness (d) away. 3. Vorrichtung nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß der unmittelbar vor der rinnenartigen Vertiefung (2) liegende Teil (4) der nach außen gewölbten Flügelfläche kreisförmig ist und mit der vorderen Wand (6) der Rinne (2) eine scharfe Kante (5) bildet. 3. Device according to claims 1 and 2, characterized in that that the part (4) lying immediately in front of the channel-like depression (2) of the after outside arched wing surface is circular and with the front wall (6) of the gutter (2) forms a sharp edge (5). 4. Vorrichtung nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß die rückwärtige obere Kante (7) der Rinne (2) kreisförmig abgerundet ist. 4. Device according to claims 1 to 3, characterized in that that the rear upper edge (7) of the channel (2) is rounded in a circle. 5. Vorrichtung nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß die Rinne (2) durch eine Öffnung (13) im Fuß des Flügels mit der hohlen Laufradnabe (9) und der hohlen Antriebswelle (10) in Verbindung steht. 5. Device according to claims 1 to 4, characterized in that that the channel (2) through an opening (13) in the base of the wing with the hollow impeller hub (9) and the hollow drive shaft (10) is in connection.
DEW40072A 1965-10-11 1965-10-11 Device for gassing liquids Pending DE1278409B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEW40072A DE1278409B (en) 1965-10-11 1965-10-11 Device for gassing liquids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW40072A DE1278409B (en) 1965-10-11 1965-10-11 Device for gassing liquids

Publications (1)

Publication Number Publication Date
DE1278409B true DE1278409B (en) 1968-09-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEW40072A Pending DE1278409B (en) 1965-10-11 1965-10-11 Device for gassing liquids

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2405090A1 (en) * 1977-10-10 1979-05-04 Grotz Wilhelm AGITATOR APPARATUS
EP1050334A1 (en) * 1999-05-02 2000-11-08 Arnold Ag Typhon mixer
EP1243313A2 (en) * 2001-03-23 2002-09-25 R.T.N. S.r.l. Device and method for mixing a gas with a liquid or a liquid with a liquid
EP3342480A1 (en) * 2016-12-27 2018-07-04 Zeppelin Systems GmbH Mixing tool for a mixer and mixer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2405090A1 (en) * 1977-10-10 1979-05-04 Grotz Wilhelm AGITATOR APPARATUS
EP1050334A1 (en) * 1999-05-02 2000-11-08 Arnold Ag Typhon mixer
EP1243313A2 (en) * 2001-03-23 2002-09-25 R.T.N. S.r.l. Device and method for mixing a gas with a liquid or a liquid with a liquid
EP1243313A3 (en) * 2001-03-23 2004-09-01 R.T.N. S.r.l. Device and method for mixing a gas with a liquid or a liquid with a liquid
EP3342480A1 (en) * 2016-12-27 2018-07-04 Zeppelin Systems GmbH Mixing tool for a mixer and mixer

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