EP0204688B1 - Installation d'aérage pour liquides - Google Patents

Installation d'aérage pour liquides Download PDF

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Publication number
EP0204688B1
EP0204688B1 EP86890128A EP86890128A EP0204688B1 EP 0204688 B1 EP0204688 B1 EP 0204688B1 EP 86890128 A EP86890128 A EP 86890128A EP 86890128 A EP86890128 A EP 86890128A EP 0204688 B1 EP0204688 B1 EP 0204688B1
Authority
EP
European Patent Office
Prior art keywords
liquid
rotor
flow channels
stator
flow
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
EP86890128A
Other languages
German (de)
English (en)
Other versions
EP0204688A3 (en
EP0204688A2 (fr
EP0204688B2 (fr
Inventor
Heinrich Dr. Techn. Dipl.-Ing. Ebner
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.)
Heinrich Frings GmbH and Co KG
Original Assignee
Heinrich Frings GmbH and Co KG
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
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Application filed by Heinrich Frings GmbH and Co KG filed Critical Heinrich Frings GmbH and Co KG
Publication of EP0204688A2 publication Critical patent/EP0204688A2/fr
Publication of EP0204688A3 publication Critical patent/EP0204688A3/de
Publication of EP0204688B1 publication Critical patent/EP0204688B1/fr
Application granted granted Critical
Publication of EP0204688B2 publication Critical patent/EP0204688B2/fr
Anticipated expiration legal-status Critical
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    • 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
    • B01F23/23342—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 the stirrer being of the centrifugal type, e.g. with a surrounding stator

Definitions

  • the invention relates to a ventilation device for liquids, consisting of a arranged in the bottom region of a container, air and liquid sucking rotor with a vertical axis of rotation and a stator surrounding the rotor, which has a closed ring of cross-sectional flow channels, each with an inlet opening for the Has liquid-air mixture, wherein the flow channels are inclined with respect to the radial direction in the direction of rotation of the rotor.
  • the ventilation becomes weaker because the flow velocity of the ejected liquid-air mixture decreases rapidly radially outwards, and this already in the area of the flow channels. This means that the diameter of the container receiving the liquid to be aerated must not exceed a certain dimension in order to ensure uniform ventilation of the liquid over the entire container cross-section at a given rotor output.
  • a rotor arranged within a coaxial housing and having a vertical axis of rotation, is arranged in the bottom region of the container, which rotor sucks liquid from the container with the aid of pump vanes and pumps it axially through the housing, through its inner wall Air is blown radially inward into the liquid flow.
  • This downward flowing liquid-air mixture is pumped into a distribution clamp provided in connection with the cylindrical housing, approximately square in plan, from which two spaced-apart distribution channels extend on each circumferential side, which are inclined with respect to the radial direction in the direction of rotation of the rotor and on are angled again halfway outwards in the direction of inclination.
  • the invention is therefore based on the object of improving a ventilation device of the type described at the outset with simple means such that, with a given rotor output, uniform ventilation can also be ensured over a larger container cross section.
  • the invention achieves the stated object in that the flow channels are separated from one another by wedge-shaped spaces, the apex of which lie between the immediately adjacent inlet openings, and in that the vertical boundary surfaces of each flow channel run parallel or converge or diverge at an angle of at most 7 ° .
  • the exit velocity of the liquid-air mixture from the flow channels can be increased considerably compared to conventional stators with simple guide walls without having to increase the rotor power.
  • the higher outlet velocity of the liquid-air mixture requires a correspondingly larger outlet width of the mixture, so that even ventilation of larger container cross sections can be ensured.
  • the exit velocity of the liquid-air mixture ejected from the stator can be influenced by the shape of the flow channels.
  • the exit velocity of the liquid-air mixture is correspondingly reduced compared to the entrance velocity into the stator. If the exit velocity is to be increased, the flow cross section of the flow channels towards the exit end must be reduced by the vertical boundary surfaces converging towards the outer circumference of the stator. However, the angle between the vertical boundary surfaces of the individual flow channels must not exceed 7 ° , unless increased eddy formation is to be accepted. In this context, it must be borne in mind that turbulent flows considerably limit the possible range of the liquid-air mixture expelled.
  • the flow channels can be designed differently. For example, it is possible to form the flow channels by means of web plates which are provided between two annular disks arranged at an axial distance from one another. A particularly advantageous construction results, however, if the flow channels consist of U-profiles placed on an annular disc. This design not only offers advantageous manufacturing conditions with a comparatively low cost of materials, but also allows simple stator cleaning because the gusset areas between the individual U-profiles forming the flow channels are freely accessible.
  • the ventilation device shown which is arranged directly above a container base 1, consists essentially of a rotor 2, which is driven by a motor 3, and a stator 4 surrounding the rotor 2.
  • the vertical rotor shaft 5 passes through the Container bottom 1, on which the motor 3 is flanged.
  • the air to be introduced into the liquid of the container is sucked in via an air line 6 and fed axially to the rotor 2, which at the same time draws liquid from the container through an annular opening 7 of the stator 4 and conveys it with the air into the stator, as indicated by the flow arrows is.
  • the liquid-air mixture is received in flow channels 8, which according to FIGS. 1 to 3 are formed by vertical webs 9 which are inserted between two annular disks 10 and 11.
  • the arrangement is such that adjacent webs 9 of flow channels 8 arranged directly next to one another diverge towards the outer circumference of the stator 4, so that the vertical boundary surfaces of the flow channels 8 run parallel to one another.
  • This configuration results in an exit velocity of the flow from the flow channels 8 which corresponds approximately to the entry velocity of the liquid-air mixture conveyed into the stator 4 by the rotor 2, so that the flow continues over a large radius into the container due to the comparatively high exit velocity.
  • This ensures even ventilation of containers of larger diameters if a corresponding number of flow channels ensures that the flows of adjacent flow channels do not diverge too much, especially against the region of the peripheral wall of the container.
  • a particularly simple stator construction can be obtained in that the flow channels 8 are formed by U-profiles 12 which are placed on an annular disc 13.
  • This design not only ensures simple manufacture, but also offers advantages in terms of stator cleaning because the gusset areas between adjacent flow channels are freely accessible.
  • the vertical boundary surfaces of the individual flow channels 8 can deviate from their parallel course. If, for example, the webs 9 of the individual flow channels 8 are arranged diverging towards the outer circumference of the stator 4, the flow within the flow channels 8 is slowed down. The angle ⁇ between the vertical webs 9 must not exceed 7 ° , since otherwise with An increased eddy formation is to be expected, which greatly limits the range of the flow emerging from the flow channels 8.
  • the webs 9 can converge towards the outside, as is indicated in FIG. 6.
  • the angle a between the vertical webs 9 of the individual flow channels must be limited to a maximum of 7 ° .
  • stator With the help of the aeration device shown, the special design of the stator enables liquid to be evenly ventilated over larger base areas, these aeration devices being particularly suitable for use in submerged vinegar fermentation, in yeast production or in wastewater treatment.
  • the invention is of course not limited to the illustrated embodiment of a ventilation device.
  • very differently constructed rotors can be used.
  • B. is possible to suck liquid not only according to FIG. 1 on one side, but on both sides of the rotor.
  • the Rotorkon Structure can also be carried out so that the air can be sucked in from below the rotor, and that the motor in the form of a submersible motor of known design is mounted in the container above the rotor.
  • any gas other than air can be drawn in and distributed in any given liquid.
  • the inclination of the flow channels 8 with respect to the radial direction is then to be determined, the number of flow channels being selected depending on the inclination of the flow channels and the container diameter.
  • adjacent webs 9 of flow channels 8 arranged directly next to one another can be formed by a common intermediate body which has a wedge-shaped shape in plan, so that in turn the vertical boundary surfaces of each flow channel run at least substantially parallel.

Claims (2)

1. Dispositif d'aération pour des liquides, comprenant un rotor (2) à axe de rotation vertical disposé dans la zone du fond d'un récipient et aspirant de l'air et du liquide, et un stator (4) qui entoure le rotor (2) et qui présente une couronne fermée de canaux d'écoulement (8) de section rectangulaire présentant chacun une ouverture d'entrée pour le mélange liquide-air, les canaux d'écoulement (8) étant inclinés dans le sens de rotation du rotor (2) par rapport à la direction radiale, caractérisé par le fait que les canaux d'écoulement (8) sont séparés les uns des autres par des espaces intermédiaires en forme de coin dont les sommets sont situés entre les ouvertures d'entrée immédiatement voisines les unes des autres, et que les surfaces de délimitation verticales de chacun des canaux d'écoulement (8) sont parallèles ou convergent ou divergent sous un angle de 7° au maximum.
2. Dispositif d'aération suivant la revendication 1, caractérisé par le fait que les canaux d'écoulement (8) sont formés par des profilés (12) en U rapportés sur un plateau annulaire (13).
EP86890128A 1985-06-05 1986-05-07 Installation d'aérage pour liquides Expired - Lifetime EP0204688B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0169685A AT383108B (de) 1985-06-05 1985-06-05 Belueftungsvorrichtung fuer fluessigkeiten
AT1696/85 1985-06-05

Publications (4)

Publication Number Publication Date
EP0204688A2 EP0204688A2 (fr) 1986-12-10
EP0204688A3 EP0204688A3 (en) 1988-06-22
EP0204688B1 true EP0204688B1 (fr) 1990-01-03
EP0204688B2 EP0204688B2 (fr) 1992-11-11

Family

ID=3519010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86890128A Expired - Lifetime EP0204688B2 (fr) 1985-06-05 1986-05-07 Installation d'aérage pour liquides

Country Status (10)

Country Link
EP (1) EP0204688B2 (fr)
JP (1) JPS6244167A (fr)
CN (1) CN86103733A (fr)
AT (1) AT383108B (fr)
BR (1) BR8602601A (fr)
DE (1) DE3616680A1 (fr)
ES (1) ES8703748A1 (fr)
FI (1) FI88262C (fr)
IN (1) IN165315B (fr)
SU (1) SU1625330A3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0717440Y2 (ja) * 1988-05-18 1995-04-26 株式会社荏原製作所 攪拌・曝気装置
DE4207077C2 (de) * 1991-03-07 1997-07-03 Horst Adler Kompaktkläranlage mit besonderem Schlammrückführelement
FI91242C (fi) * 1992-07-17 1994-06-10 Outokumpu Mintec Oy Ilmastuslaite
AT398046B (de) * 1992-09-10 1994-08-25 Frings & Co Heinrich Vorrichtung zur gaseintragung in flüssigkeiten
DE9316251U1 (de) * 1993-10-25 1994-02-10 Charatjan Manuela Vorrichtung zum Rühren, bzw. zum Rühren und gleichzeitigen Begasen von Flüssigkeiten, Suspensionen und heterogenen Fluiden
DE19519553C2 (de) * 1995-05-27 1997-04-24 Michael Dipl Ing Godzik Kreiselbelüfter zum Einbringen eines Gases in eine Flüssigkeit
DE102009044168A1 (de) 2009-10-02 2011-04-07 Green Finance Ag Verfahren und Vorrichtung zur kontinuierlichen Herstellung von Alkylestern höherer Fettsäuren
CN102921320A (zh) * 2012-11-05 2013-02-13 无锡托普搅拌设备有限公司 一种气液分散搅拌器
PT3367809T (pt) * 2015-10-19 2019-04-30 Nestle Sa Aparelho e método para arejamento de um produto alimentar
WO2020213048A1 (fr) * 2019-04-15 2020-10-22 エム・テクニック株式会社 Agitateur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT269083B (de) * 1966-04-05 1969-03-10 Frings Fa Heinrich Belüftungsvorrichtung für Flüssigkeiten
US3690621A (en) * 1969-03-04 1972-09-12 Itsuko Tanaka Agitator
NO142830C (no) * 1978-02-28 1980-10-29 Trondhjems Mek Verksted As Anordning for fordeling av en gass i et vaeskemedium
FR2444494A1 (fr) * 1978-12-21 1980-07-18 Jeumont Schneider Dispositif permettant de dissoudre et/ou de melanger un fluide dans un liquide, et pouvant etre notamment utilise pour l'aeration des eaux residuaires
DE2907257C2 (de) * 1979-02-24 1982-04-22 Ukrainskij Naucno-Issledovatel'skij Uglechimiceskij Institut, Charkov Vorrichtung zur Durchlüftung von Trüben
JPS5823036U (ja) 1981-07-31 1983-02-14 パイオニア株式会社 テ−プレコ−ダ

Also Published As

Publication number Publication date
FI862145A (fi) 1986-12-06
EP0204688A3 (en) 1988-06-22
JPH0313866B2 (fr) 1991-02-25
FI88262B (fi) 1993-01-15
ES8703748A1 (es) 1987-03-01
FI88262C (fi) 1993-04-26
BR8602601A (pt) 1987-02-03
DE3616680C2 (fr) 1989-05-24
ES555750A0 (es) 1987-03-01
AT383108B (de) 1987-05-25
ATA169685A (de) 1986-10-15
FI862145A0 (fi) 1986-05-21
CN86103733A (zh) 1986-12-17
IN165315B (fr) 1989-09-16
JPS6244167A (ja) 1987-02-26
EP0204688A2 (fr) 1986-12-10
DE3616680A1 (de) 1986-12-11
EP0204688B2 (fr) 1992-11-11
SU1625330A3 (ru) 1991-01-30

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