CH593712A5 - Aeration of fermenting liquid fertilisers - using propeller with surrounding flow guide into which air is drawn - Google Patents

Aeration of fermenting liquid fertilisers - using propeller with surrounding flow guide into which air is drawn

Info

Publication number
CH593712A5
CH593712A5 CH551575A CH551575A CH593712A5 CH 593712 A5 CH593712 A5 CH 593712A5 CH 551575 A CH551575 A CH 551575A CH 551575 A CH551575 A CH 551575A CH 593712 A5 CH593712 A5 CH 593712A5
Authority
CH
Switzerland
Prior art keywords
propeller
air supply
air
supply line
rotation
Prior art date
Application number
CH551575A
Other languages
German (de)
Original Assignee
Waelchli Andres
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 Waelchli Andres filed Critical Waelchli Andres
Priority to CH551575A priority Critical patent/CH593712A5/en
Publication of CH593712A5 publication Critical patent/CH593712A5/en

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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
    • C02F3/207—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors with axial thrust propellers
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C3/00—Treating manure; Manuring
    • A01C3/02—Storage places for manure, e.g. cisterns for liquid manure; Installations for fermenting manure
    • A01C3/026—Storage places for manure, e.g. cisterns for liquid manure; Installations for fermenting manure with mixing or agitating devices
    • 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
    • B01F23/23312—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 conduit surrounding the 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
    • B01F23/2333—Single stirrer-drive aerating units, e.g. with the stirrer-head pivoting around an horizontal 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
    • B01F23/2334—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer
    • B01F23/23341—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer with tubes surrounding the 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
    • B01F23/23363—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 above the 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
    • B01F23/23365—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 at the radial periphery of the 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
    • B01F27/113—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/50—Movable or transportable mixing devices or plants
    • B01F33/502—Vehicle-mounted mixing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/50—Movable or transportable mixing devices or plants
    • B01F33/503—Floating mixing devices
    • 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)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Microbiology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Environmental Sciences (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

Aeration of liquids is achieved by motor driven propeller. This is surrounded by a concentric, circular flow guide into which an airline discharges. The other end of this air line may be open to atmosphere or connected to a blown air supply. The flow guide can be a ring shaped pipe or be a cylindrical sheath surrounding the propeller. The airline may be joined to the ring shaped pipe. The air line may be formed from the hollow shaft of the propeller. Also, it may form a concentric pipe around the shaft. Used in the treatment of liquid manures. The fertiliser value of these is improved if anaerobic digestion is replaced by aerobic. The device permit intense aeration even in the presence of other substances.

Description

       

  
 



   Die vorliegende Erfindung bezieht sich auf eine Vorrichtung zum Belüften von Flüssigkeiten mit einem motorisch an treibbaren Propeller und einer den Propeller konzentrisch umgebenden Leiteinrichtung.



   Vorrichtungen der erwähnten Art sind als Rührwerke bekannt und werden unter anderem zur Homogenisierung von Jauche als schwimmende, fahrbare oder stationäre Aggregate eingesetzt. Es hat sich gezeigt, dass der Düngewert von Jauche, d. h. ihr Stickstoffgehalt, verbessert werden kann, wenn in ihr anstelle des bisher vorherrschenden anaeroben Abbaus der organischen Substanzen der aerobe Abbau begünstigt wird. Weiter ist es oft wünschbar, wenn der Jauche zu ihrer Qualitätsverbesserung weitere, für sich allein wirksame oder die aerobe Gärung steuernde Substanzen zugegeben werden können. In diesem Zusammenhang stellt sich die Aufgabe, eine Vorrichtung zu schaffen, welche ein intensives Belüften einer Flüssigkeit, vorzugsweise auch die Zugabe wei- terer Substanzen ermöglicht.



   Erfindungsgemäss wird diese Aufgabe dadurch gelöst, dass eine Luftzufuhrleitung innerhalb der Leiteinrichtung endet Anhand der beiliegenden schematischen Zeichnung wird die Erfindung beispielsweise erläutert. Es zeigen:
Fig. 1 eine Seitenansicht eines ersten Ausführungsbeispiels, teilweise geschnitten,
Fig. 2 eine Seitenansicht eines zweiten Ausführungsbeispiels, teilweise geschnitten,
Fig. 3 einen Ausschnitt aus einem dritten Ausführungsbeispiel,
Fig. 4 einen Ausschnitt aus einem vierten Ausführungsbeispiel,
Fig. 5 einen Auschnitt aus einem fünften Ausführungsbeispiel,
Fig. 6 einen Ausschnitt aus einem sechsten Ausführungsbeispiel,
Fig. 7 eine Ansicht in Richtung des Pfeiles VII in Fig. 6, wobei Teile weggelassen sind,
Fig. 8 einen Ausschnitt aus einem siebten Ausführungsbeispiel und
Fig. 9 eine Ansicht in Richtung des Pfeiles IX in Fig. 8, wobei Teile weggelassen sind.



   Beim Ausführungsbeispiel nach Fig. 1 wird durch eine nichtdargestellte, stationäre Halteeinrichtung oder, wie strich punktiert eingezeichnet, durch Schwimmer 1 ein Tragrohr 2 vertikal gehalten, so dass es mit seinem unteren Ende in einem Flüssigkeitsbad F eintaucht. Im Tragrohr 2 ist axial eine Welle 3 drehbar gelagert, die an ihrem unteren Ende einen Propeller 4 trägt und am oberen Ende getrieblich mit der Abtriebwelle eines Motors 5 verbunden ist. Der Propel   ler    4 ist mit einem konzentrischen Ring 6 umgeben, der als Leiteinrichtung dient. Bei laufendem Motor 5, bzw. bei drehendem Propeller 4 entsteht im Flüssigkeitsbad F eine Strömung durch den Ring 6 in Richtung der eingezeichneten Pfeile.

  Diese Strömung saugt Luft durch eine Luftzufuhrleitung 7 an, welche fest mit dem Tragrohr 2 verbunden ist, und mit einem Ende im Bereich des Ringes 6 und mit dem anderen Ende über dem Bad F endet Das obere Ende der Leitung 7 ist trichterförmig ausgeweitet, um erforderlichenfalls das Einführen weiterer Substanzen durch das Rohr 7 zu erleichtern.



   Beim Ausführungsbeispiel nach Fig. 2 ist ein Tragrohr 8 mit einem Radpaar 9 ausgerüstet, so dass die ganze Vorrichtung als Einachsfahrzeug relativ leicht zu verschiedenen Einsatzstellen gebracht werden kann. Im Tragrohr 8 ist eine Welle 10 drehbar gelagert, die am unteren Ende einen Propeller 11 trägt und am oberen Ende getrieblich mit einem Motor 12 verbunden ist. Der Propeller 11 ist konzentrisch von einem Ringzylinder 13 umgeben, der mittels einer Strebe am Tragrohr 8 befestigt ist. Im Ringzylinder 13 endet ein Luftzufuhrrohr 14, das an seinem oberen Ende an einer Blasluftquelle 15 angeschlossen ist. Die Verwendung einer Blasluftquelle 15 ist dort angezeigt, wo der Propeller   I1    relativ tief in das Bad F eingetaucht wird und daher ein zwangsweises Zuführen der Luft in den vom Propeller 11 erzeugten Flüssigkeitsstrom zweckmässig ist.



   Das Ausführungsbeispiel nach Fig. 3 zeigt ein Tragrohr 16, in dem die Welle 17 des Propellers 18 drehbar gelagert ist. Die Welle 17 ist als Hohlwelle ausgebildet und ist an ihrem anderen, nicht dargestellten Ende gegenüber der Atmo sphäre offen. Der Propeller 16 ist durch eine ringzylindrische Leiteinrichtung 19 umgeben. Bei drehendem Propeller 18 wird durch die Flüssigkeitsströmung Luft durch die Hohlwelle 17 aus der freien Atmosphäre angesaugt
Beim Ausführungsbeispiel nach Fig. 4 ist das Tragrohr 20, in dem die Welle 21 des Propellers 22 drehbar gelagert ist, von einem im Innendurchmesser grösseren Rohr 23 konzentrisch umgeben, so dass sich zwischen diesem und dem Tragrohr 20 ein im Querschnitt ringförmiger Kanal 24 bildet, der mit der Aussenatmosphäre oder einer Druckluftquelle verbunden ist.

  Die ringzylindrische Leiteinrichtung 25, die den Propeller 22 konzentrisch umgibt, ist durch eine Strebe mit dem Rohr 23 fest verbunden. Bei drehendem Propeller 22 wird die Luft durch den Ringkanal 24 angesaugt.



   Beim Ausführungsbeispiel nach Fig. 5 ist am Tragrohr 26 mittels einer Strebe ebenfalls eine ringzylindrische Leiteinrichtung 27 befestigt, welche den Propeller 28 konzentrisch umgibt. Eine Luftzufuhrleitung 29 mündet mit ihrem unteren Ende in die Wand der Leiteinrichtung 27 und ist mit dieser fest verbunden. Das nicht dargestellte obere Ende mündet in der freien Atmosphäre oder ist mit einer Blasluftquelle verbunden.



   Bei allen Ausführungsbeispielen wird in die vom Propel   ler    erzeugte Flüssigkeitsströmung im Bereich der Leiteinrichtung die Luft eingeführt, wodurch ein gutes Einrühren der Luft in die Flüssigkeit gewährleistet wird.



   Beim Ausführungsbeispiel nach den Fig. 6 und 7 ist der Propeller 30 vom Leitapparat 31 umgeben und dreht in Rich- tung des in Fig. 7 eingezeichneten Pfeiles. Das Tragrohr 32 für die Welle 33 ist axial vom Luftzufuhrrohr 34 umgeben.



  Das Luftzufuhrrohr 34 bildet mit dem Tragrohr 32 einen im Querschnitt ringförmigen Kanal 35, der gegen den Propeller 30 durch eine Platte 36 abgeschlossen ist. Gegen die Atmosphäre ist der Kanal 35 oben offen und eventuell durch ein Ventil abschliessbar, um die eintretende, vom Propeller 30 an- gesaugte Luftmenge regulieren zu können. In der Platte 36 sind achssymmetrisch zur Welle 33 vier Bohrungen 37 angeordnet, an die je ein in Drehrichtung des Propellers 30 gekrümmtes Rohrstück 38 anschliesst Die Krümmung jedes Rohrstückes 38 ist derart, dass es eine Leitfläche bildet, welche, in Drehrichtung des Propellers 30, die Luft längs einer Geraden 39 unter einem spitzen Winkel gegen eine zur Welle 33 rechtwinklige Ebene 40 lenkt.

   Dieses Umlenken der Luft, welches ihr beim Austritt aus den Rohrstücken 38 eine in Drehrichtung des Propellers 30 gerichtete Bewegungskomponente verleiht, erhöht die Saugwirkung des Propellers wesentlich, so dass mit Sicherheit der im Ausführungs- beispiel nach Fig. 2 erwähnte Kompressor entfallen kann.



   Beim Ausführungsbeispiel nach den Fig. 8 und 9 ist der Propeller 41 mit seiner Welle 42 im Tragrohr 43 drehbar gelagert. Ein Leitapparat 44 umgibt axial den Propeller 41.



  Längs dem Tragrohr 43 und mit diesem fest verbunden verläuft eine im Längsschnitt dargestellte Luftzufuhrleitung 45, welche am nicht sichtbaren Ende gegen die Atmosphäre offen und an dem dem Propeller zugewandten Ende gekrümmt ist. Die Krümmung am Ende der Luftzufuhrleitung 45 bildet eine Leitfläche, die die Luft in Richtung einer Geraden 46 unter einem spitzen Winkel gegen eine zur Propeller  welle 42 rechtwinklige Ebene 47 lenkt. Hierdurch erhält die aus dem Luftzufuhrrohr 45 austretende Luft beim Austritt eine in Drehrichtung des Propellers 41 (Pfeil in Fig. 9) geruch- tete Bewegungskomponente.



   Bei einem weiteren nicht dargestellten Ausführungsbeispiel wird die Luft im Prinzip in gleicher Weise zugeführt wie beim Ausführungsbeispiel nach Fig. 5. Das Luftzufuhrrohr 29 ist indessen so an Leitapparat 27 befestigt, dass auch dort die austretende Luft eine in Drehrichtung des Propellers 28 gerichtete Bewegungskomponente erhält, wodurch die Saugwirkung des Propellers wesentlich erhöht wird. 



  
 



   The present invention relates to a device for aerating liquids with a motor-driven propeller and a guide device concentrically surrounding the propeller.



   Devices of the type mentioned are known as agitators and are used, among other things, for the homogenization of manure as floating, mobile or stationary units. It has been shown that the manure value of liquid manure, i.e. H. its nitrogen content can be improved if aerobic degradation is favored in it instead of the previously prevailing anaerobic degradation of organic substances. Furthermore, it is often desirable if further substances that are effective in themselves or that control aerobic fermentation can be added to the liquid manure to improve its quality. In this context, the task arises of creating a device which enables intensive ventilation of a liquid, preferably also the addition of further substances.



   According to the invention, this object is achieved in that an air supply line ends inside the guide device. The invention is explained, for example, using the accompanying schematic drawing. Show it:
Fig. 1 is a side view of a first embodiment, partially in section,
Fig. 2 is a side view of a second embodiment, partially in section,
3 shows a section from a third exemplary embodiment,
4 shows a detail from a fourth embodiment,
5 shows a section from a fifth embodiment,
6 shows a detail from a sixth embodiment,
Fig. 7 is a view in the direction of arrow VII in Fig. 6, with parts being omitted,
8 shows a detail from a seventh embodiment and
FIG. 9 is a view in the direction of arrow IX in FIG. 8, with parts being omitted.



   In the embodiment according to FIG. 1, a support tube 2 is held vertically by a stationary holding device (not shown) or, as shown in dashed lines, by a float 1, so that its lower end is immersed in a liquid bath F. In the support tube 2, a shaft 3 is axially rotatably mounted, which carries a propeller 4 at its lower end and is geared to the output shaft of a motor 5 at the upper end. The Propel ler 4 is surrounded by a concentric ring 6 which serves as a guide device. When the engine 5 is running or the propeller 4 is rotating, a flow is created in the liquid bath F through the ring 6 in the direction of the arrows shown.

  This flow sucks in air through an air supply line 7, which is firmly connected to the support tube 2, and ends with one end in the area of the ring 6 and the other end above the bath F. The upper end of the line 7 is funnel-shaped widened to, if necessary to facilitate the introduction of further substances through the tube 7.



   In the exemplary embodiment according to FIG. 2, a support tube 8 is equipped with a pair of wheels 9, so that the entire device as a single-axle vehicle can be brought relatively easily to different locations. In the support tube 8, a shaft 10 is rotatably mounted, which carries a propeller 11 at the lower end and is geared to a motor 12 at the upper end. The propeller 11 is concentrically surrounded by an annular cylinder 13 which is fastened to the support tube 8 by means of a strut. In the ring cylinder 13, an air supply pipe 14 ends, which is connected at its upper end to a blown air source 15. The use of a blown air source 15 is indicated where the propeller I1 is immersed relatively deeply in the bath F and therefore a forced supply of air into the liquid flow generated by the propeller 11 is expedient.



   The embodiment according to FIG. 3 shows a support tube 16 in which the shaft 17 of the propeller 18 is rotatably mounted. The shaft 17 is designed as a hollow shaft and is open at its other end, not shown, with respect to the atmosphere. The propeller 16 is surrounded by a ring-cylindrical guide device 19. When the propeller 18 is rotating, the liquid flow sucks in air through the hollow shaft 17 from the free atmosphere
In the exemplary embodiment according to FIG. 4, the support tube 20, in which the shaft 21 of the propeller 22 is rotatably mounted, is concentrically surrounded by a tube 23 with a larger inner diameter, so that a channel 24 with an annular cross-section is formed between this and the support tube 20, which is connected to the outside atmosphere or a source of compressed air.

  The ring-cylindrical guide device 25, which concentrically surrounds the propeller 22, is firmly connected to the tube 23 by a strut. When the propeller 22 is rotating, the air is sucked in through the annular channel 24.



   In the exemplary embodiment according to FIG. 5, an annular cylindrical guide device 27, which surrounds the propeller 28 concentrically, is also attached to the support tube 26 by means of a strut. An air supply line 29 opens with its lower end into the wall of the guide device 27 and is firmly connected to it. The upper end, not shown, opens into the open atmosphere or is connected to a source of blown air.



   In all exemplary embodiments, the air is introduced into the liquid flow generated by the propeller in the region of the guide device, which ensures that the air is well stirred into the liquid.



   In the exemplary embodiment according to FIGS. 6 and 7, the propeller 30 is surrounded by the diffuser 31 and rotates in the direction of the arrow drawn in FIG. The support tube 32 for the shaft 33 is surrounded axially by the air supply tube 34.



  The air supply pipe 34 forms with the support pipe 32 a channel 35 which is annular in cross section and which is closed off from the propeller 30 by a plate 36. The channel 35 is open at the top against the atmosphere and can possibly be closed by a valve in order to be able to regulate the amount of air sucked in by the propeller 30. In the plate 36, four bores 37 are arranged axially symmetrical to the shaft 33, each of which is adjoined by a pipe section 38 curved in the direction of rotation of the propeller 30. The curvature of each pipe section 38 is such that it forms a guide surface which, in the direction of rotation of the propeller 30, is Air is directed along a straight line 39 at an acute angle against a plane 40 at right angles to the shaft 33.

   This deflection of the air, which gives it a movement component directed in the direction of rotation of the propeller 30 when it emerges from the pipe sections 38, increases the suction effect of the propeller significantly, so that the compressor mentioned in the exemplary embodiment according to FIG. 2 can certainly be omitted.



   In the embodiment according to FIGS. 8 and 9, the propeller 41 is rotatably mounted with its shaft 42 in the support tube 43. A diffuser 44 axially surrounds the propeller 41.



  An air supply line 45, shown in longitudinal section, runs along the support tube 43 and is firmly connected to it, which is open to the atmosphere at the non-visible end and is curved at the end facing the propeller. The curvature at the end of the air supply line 45 forms a guide surface which directs the air in the direction of a straight line 46 at an acute angle against a plane 47 at right angles to the propeller shaft 42. As a result, the air emerging from the air supply pipe 45 receives a movement component that is odorous in the direction of rotation of the propeller 41 (arrow in FIG. 9) when it emerges.



   In a further exemplary embodiment, not shown, the air is in principle supplied in the same way as in the exemplary embodiment according to FIG. 5. The air supply pipe 29 is, however, attached to the diffuser 27 in such a way that the emerging air receives a movement component directed in the direction of rotation of the propeller 28, which significantly increases the suction effect of the propeller.

Claims (1)

PATENTANSPRUCH PATENT CLAIM Vorrichtung zum Belüften von Flüssigkeiten mit einem motorisch antreibbaren Propeller und einer den Propeller konzentrisch umgebenden Leiteinrichtung, dadurch gekennzeichnet, dass eine Luftzufuhrleitung innerhalb der Leiteinrichtung endet. Device for aerating liquids with a motor-driven propeller and a guide device concentrically surrounding the propeller, characterized in that an air supply line ends inside the guide device. UNTERANSPRÜCHE 1. Vorrichtung nach Patentanspruch, dadurch gekennzeichnet, dass das andere Ende der Luftzufuhrleitung bei in die Flüssigkeit eingetauchter Vorrichtung offen gegen die freie Atmosphäre ist. SUBCLAIMS 1. Device according to claim, characterized in that the other end of the air supply line is open to the free atmosphere when the device is immersed in the liquid. 2. Vorrichtung nach Patentanspruch, dadurch gekenn zeichnet, dass das andere Ende der Luftzufuhrleitung an einer Blasluftquelle angeschlossen ist. 2. Device according to claim, characterized in that the other end of the air supply line is connected to a blown air source. 3. Vorrichtung nach Patentanspruch, dadurch gekennzeichnet, dass die Leiteinrichtung ringförmig ausgebildet ist. 3. Device according to claim, characterized in that the guide device is annular. 4. Vorrichtung nach Patentanspruch, dadurch gekennzeichnet, dass die Leiteinrichtung ringzylindrisch ausgebildet ist. 4. Device according to claim, characterized in that the guide device is designed as an annular cylinder. 5. Vorrichtung nach Patentanspruch, dadurch gekennzeichnet, dass die Luftzufuhrleitung in der ringzylindrischen Wand der Leiteinrichtung endet. 5. Device according to claim, characterized in that the air supply line ends in the annular cylindrical wall of the guide device. 6. Vorrichtung nach Patentanspruch, dadurch gekennzeichnet, dass die Propellerwelle eine als Luftzufuhrleitung dienende Hohlwelle ist. 6. Device according to claim, characterized in that the propeller shaft is a hollow shaft serving as an air supply line. 7. Vorrichtung nach Patentanspruch, dadurch gekennzeichnet, dass die Luftzufuhrleitung die Propellerwelle konzentrisch umgibt. 7. Device according to claim, characterized in that the air supply line surrounds the propeller shaft concentrically. 8. Vorrichtung nach Patentanspruch, dadurch gekennzeichnet, dass am Ende der Luftzufuhrleitung eine Umlenkfläche vorgesehen ist, welche die Luft in Drehrichtung des Propellers unter einem spitzen Winkel gegen ein zur Propellerdrehachse rechtwinklige Ebene lenkt, derart, dass die austretende Luft eine in Drehrichtung des Propellers gerichtete Bewegungskomponente erhält. 8. The device according to claim, characterized in that a deflection surface is provided at the end of the air supply line, which directs the air in the direction of rotation of the propeller at an acute angle against a plane perpendicular to the propeller axis of rotation, such that the exiting air is directed in the direction of rotation of the propeller Movement component receives. 9. Vorrichtung nach Patentanspruch, dadurch gekennzeichnet, dass die Luftzufuhrleitung die Propellerachse axial umgibt und im Bereich des Propellers in mehrere achssymme- trisch verteilte Austrittleitungen aufgeteilt ist, und dass jede Austrittleitung mit einer Umlenkfläche versehen ist, derart, dass die austretende Luft in Drehrichtung des Propellers eine Bewegungskomponente erhält. 9. The device according to claim, characterized in that the air supply line surrounds the propeller axis axially and is divided into several axially symmetrically distributed outlet lines in the area of the propeller, and that each outlet line is provided with a deflection surface such that the exiting air in the direction of rotation of the Propeller receives a component of movement.
CH551575A 1975-04-29 1975-04-29 Aeration of fermenting liquid fertilisers - using propeller with surrounding flow guide into which air is drawn CH593712A5 (en)

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CH551575A CH593712A5 (en) 1975-04-29 1975-04-29 Aeration of fermenting liquid fertilisers - using propeller with surrounding flow guide into which air is drawn

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Application Number Priority Date Filing Date Title
CH551575A CH593712A5 (en) 1975-04-29 1975-04-29 Aeration of fermenting liquid fertilisers - using propeller with surrounding flow guide into which air is drawn

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CH593712A5 true CH593712A5 (en) 1977-12-15

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0008462A1 (en) * 1978-08-24 1980-03-05 Anton Reck Apparatus for mixing and aerating liquids
FR2541557A2 (en) * 1981-10-21 1984-08-31 Defontaine Sa Installation for the homogenising stirring of loaded liquids
EP0042620B1 (en) * 1980-06-23 1986-04-16 Josef Ostermaier Apparatus for conditioning liquid manure
EP0355082A1 (en) * 1988-08-16 1990-02-21 ITT Flygt Aktiebolag Jet ring

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0008462A1 (en) * 1978-08-24 1980-03-05 Anton Reck Apparatus for mixing and aerating liquids
EP0042620B1 (en) * 1980-06-23 1986-04-16 Josef Ostermaier Apparatus for conditioning liquid manure
FR2541557A2 (en) * 1981-10-21 1984-08-31 Defontaine Sa Installation for the homogenising stirring of loaded liquids
EP0355082A1 (en) * 1988-08-16 1990-02-21 ITT Flygt Aktiebolag Jet ring

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