EP0550510A1 - Buse d'aeration de liquides contenant des substances organiques. - Google Patents

Buse d'aeration de liquides contenant des substances organiques.

Info

Publication number
EP0550510A1
EP0550510A1 EP91916556A EP91916556A EP0550510A1 EP 0550510 A1 EP0550510 A1 EP 0550510A1 EP 91916556 A EP91916556 A EP 91916556A EP 91916556 A EP91916556 A EP 91916556A EP 0550510 A1 EP0550510 A1 EP 0550510A1
Authority
EP
European Patent Office
Prior art keywords
nozzle according
ventilation nozzle
outer sleeve
liquid channel
inner sleeve
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.)
Granted
Application number
EP91916556A
Other languages
German (de)
English (en)
Other versions
EP0550510B1 (fr
Inventor
Gaston Wopfner
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.)
Anton Steinecker Entwicklungs GmbH and Co
Original Assignee
Anton Steinecker Entwicklungs GmbH and Co
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 Anton Steinecker Entwicklungs GmbH and Co filed Critical Anton Steinecker Entwicklungs GmbH and Co
Publication of EP0550510A1 publication Critical patent/EP0550510A1/fr
Application granted granted Critical
Publication of EP0550510B1 publication Critical patent/EP0550510B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
    • B01F25/31425—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction with a plurality of perforations in the axial and circumferential direction covering the whole surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction

Definitions

  • Ventilation nozzle for aerating liquids containing organic substances
  • the invention relates to a ventilation nozzle for aerating liquids containing organic substances with a liquid channel with at least one gas inlet opening for admixing a gas into a liquid flowing through the liquid channel and with a mixing chamber which is passed through by the liquid gas mixture which after passing through the mixing chamber has a pressure drop in an expansion space is expanded and an analogous method for aerating wort according to the preamble of claim 24.
  • Venturi nozzles are usually used.
  • Such Venturi nozzles are designed as a tube which narrows in the form of a nozzle and then widens in the form of a diffuser. If a liquid passes through a Venturi tube, the speed of the liquid is increased at an existing pressure. A negative pressure then arises. If a gas flow is supplied to the Venturi nozzle through which the liquid flows, the gas is drawn into the Venturi tube due to the negative pressure and mixed with the liquid.
  • a ventilation nozzle is used for. B. in brewing technology for wort aeration and yeast aeration, or z. B. at the
  • Filter water treatment for oxygen degassing with C02 for the carbonization of beer and mineral water and for wastewater neutralization.
  • aeration of wort is particularly discussed. If the wort flowing into the Venturi nozzle is mixed with air, a fine distribution of the air in the wort is achieved, which has a favorable influence on the flotation effect. The finer the air bubbles are distributed in the wort, the more evenly is the foam blanket formation during flotation.
  • a disadvantage of using Venturi nozzles is that large pressures occur in the Venturi tube, which make it necessary to use an additional propellant pump when large quantities of liquid flow through.
  • yeast aeration can also result in a lowering of the fermentation power of the yeast due to the high pressures and the narrow annular gap.
  • the invention has for its object to provide a ventilation nozzle for aerating liquids containing organic substances and an analogous method, which an effective targeted generation of gas bubbles with a finer distribution in liquids than it from the prior art known is possible.
  • the liquid channel is over part of its length is surrounded by a closed annular chamber which is provided with a gas supply opening.
  • a large number of the gas inlet openings are formed in the wall of the liquid channel in the region of the annular chamber. This makes it possible to distribute the gas flowing through the gas supply opening evenly around the liquid flow and to feed the gas uniformly along its entire circumference.
  • the gas supply opening has a cross-sectional area of at least 1 1/2 times the size of the total gas entry area formed by the gas entry openings, an overpressure can build up in the annular chamber, by means of which the gas can penetrate into the liquid channel containing the liquid flow.
  • the liquid channel and the mixing chamber shaped like a hollow cylinder, the liquid channel having an inside diameter dl which is larger than the inside diameter d2 of the mixing chamber, the liquid channel merging into the mixing chamber with a conically tapering wall and the mixing chamber having a length which is at least 1 1 / 2 times the inside diameter d2 of the mixing chamber, a particularly effective, targeted and fine distribution of the gas bubbles in the liquid is achieved when the liquid gas mixture is expanded via a pressure gradient into the expansion space.
  • the flotation is considerably improved, which manifests itself in a much more uniform and, above all, more compact foam blanket formation than is known from the prior art.
  • the gas inlet openings are bores which have a diameter of at most one millimeter. This leads to fine gas flows enveloping the liquid flow in a network. These reticulated gas streams remain essentially on the surface of the liquid stream and move together with it over the conically tapering wall into the mixing chamber.
  • the gas is mixed with the liquid in a laminar manner without the formation of turbulence, which results in a particularly uniform formation of bubbles in the liquid. It is particularly favorable 25-30 of the gas inlet openings in the wall of the liquid channel in the area of the annular chamber to train. If the distance between 2 of the gas inlet openings is at least 10 mm, the gas admixture is particularly effective.
  • the conical wall forms an angle oC with the axis of the outer wall of the liquid channel, which is at most 22 °. This slow transition of the liquid gas mixture from the liquid channel into the mixing chamber with a smaller diameter is necessary, on the one hand, to allow a laminar admixture of the gas to the liquid and, on the other hand, to prevent the occurrence of excessive pressures in the ventilation nozzle.
  • the liquid channel is part of an inner sleeve
  • part of the expansion space and the gas supply opening are part of an outer sleeve
  • the annular chamber is formed by inserting the inner sleeve into the outer sleeve, the inner sleeve being an inner wall and the outer sleeve being an outer wall of the annular chamber form.
  • the inner sleeve can thus be separated from the outer sleeve at any time without difficulty, thereby the Ventilation nozzle can be cleaned easily.
  • the tapered wall and the mixing chamber are formed in the outer sleeve. According to a second advantageous embodiment, the tapered wall and the mixing chamber are formed in the inner sleeve.
  • the inner sleeve comprises at least one wall part, the outer diameter of which is designed to match the inner diameter of the outer sleeve, the inner sleeve lies firmly in the outer sleeve, so that it assumes a stable position there.
  • annular chamber it is advantageous to seal the annular chamber on both sides, since the required excess pressure can be built up in the annular chamber without unnecessary pressure expenditure.
  • radially pointing grooves running in the circumferential direction can advantageously be formed for receiving a respective sealing ring.
  • O-rings can be used as a sealing ring.
  • other sealing materials such as e.g. B. metal seals or Teflon seals conceivable.
  • the outer sleeve has a stop surface for one end of the inner sleeve on which the Inner sleeve sits when inserted into the outer sleeve. This also defines the position of the inner sleeve in the longitudinal direction relative to the outer sleeve.
  • a seal can advantageously be provided between the inner sleeve and the stop surface of the outer sleeve. The seal can then be used on one side to seal the annular chamber.
  • the inner sleeve is completely received in the outer sleeve and pressed onto the stop surface with a closure.
  • the inner sleeve is then secured against slipping with respect to the outer sleeve.
  • the closure can preferably be screwed to the outer sleeve. It is also advantageous to seal the closure, since the inner sleeve is then positioned particularly effectively and stably in the outer sleeve and the annular chamber is additionally sealed. It is also advantageous if the closure is part of an extension piece, with which the ventilation nozzle can be fastened in a device.
  • the extension piece is part of the inner sleeve
  • the inner sleeve can protrude beyond the outer sleeve and together with the outer sleeve form a collar, over which a union nut is screwed, the inner sleeve being pressed onto the stop surface of the outer sleeve.
  • the inner sleeve is also stably positioned in the outer sleeve in this way. If a seal is provided in the collar between the inner sleeve and the outer sleeve, this seal can be used to seal the annular chamber on one side. If a gas supply nozzle is formed at the gas supply opening of the annular chamber, the ventilation nozzle can be connected to a gas supply line in a particularly simple manner.
  • the standard connections can have nominal diameters between DN 20 and DN 200. This is because the device according to the invention works particularly well with liquid throughputs which are designed for these standard sizes.
  • the wort is fed to the liquid channel with an overpressure of 3 - 5 bar and a volume flow of 0.2 - 200 m 3 / h.
  • FIG. 1 shows a cross section of a first exemplary embodiment of the ventilation nozzle according to the invention
  • Figure 2 shows a cross section of a second embodiment of the ventilation nozzle according to the invention.
  • the ventilation nozzle 1 has a liquid channel 2 which extends over part of it Length is surrounded by a closed annular chamber 3.
  • the annular chamber is provided with a gas supply opening 4. 25-30 holes with a diameter of at most one millimeter are formed in the wall of the liquid channel 2 in the area of the annular chamber 3.
  • the distance between two of the holes 5 is at least 10 mm and the holes are offset from one another in the circumferential direction.
  • the gas supply opening 4 has a cross-sectional area of at least 1 1/2 times the size of the total gas inlet areas formed by the bores.
  • the liquid channel 2 is connected to the mixing chamber 7 via a conically tapering wall 6.
  • the mixing chamber has an inner diameter d2 which is smaller than the inner diameter d2 of the liquid channel.
  • the tapered wall forms an angle ⁇ ⁇ 'with the axis of the outer wall of the liquid channel 2, which is at most 22 °.
  • the mixing chamber 7 has a length which corresponds to at least 1 1/2 times the inner diameter D2 of the mixing chamber 7.
  • the liquid enveloped in the gas network is mixed in a laminar manner as it passes through the tapered wall 6 and the mixing chamber 7, the occurrence of turbulence being avoided.
  • the mixing chamber 7 ends in an expansion space 9, in which the Liquid gas mixture is expanded over a pressure drop. When the incoming liquid gas mixture expands, a particularly uniform and effective bubble formation is generated in the liquid.
  • the ventilation nozzle 1 is divided into an inner sleeve 10 and an outer sleeve 11.
  • the inner sleeve 10 is inserted into the outer sleeve 11 such that the inner sleeve 10 is seated on a stop surface 12 of the outer sleeve 11.
  • the annular chamber 3 is formed by the inner sleeve 10 and the outer sleeve 11.
  • the liquid channel 2, the conically tapering wall v 6 and the mixing chamber 7 are parts of the inner sleeve 10.
  • a part of the expansion space 9 is part of the outer sleeve 11.
  • the inner sleeve 10 is completely contained in the outer sleeve 11.
  • a neck piece 13 is screwed to the outer sleeve 11 with a closure 14, whereby the inner sleeve 10 is pressed onto the stop surface 12 of the outer sleeve 11.
  • the closure 14 is sealed with an O-ring.
  • grooves 16 for receiving O-rings 15 are formed on both sides of the annular chamber 3 in the inner wall of the outer sleeve 11. As a result, the annular chamber 3 is sealed so that an excess pressure can be effectively maintained therein.
  • the liquid channel 2 and the connecting piece 13 are parts of the inner sleeve 10.
  • the tapered wall 6, the mixing chamber 7 and part of the expansion space 9 are parts of the outer sleeve 11.
  • the inner sleeve 10 projects beyond the outer sleeve 11 and forms a collar 16 together with the outer sleeve.
  • a union nut 18 is screwed over the collar 16, the inner sleeve 10 is pressed onto the stop surface 12 of the outer sleeve 11.
  • the grooves 16 for receiving O-rings 15, with which the ring chamber 3 is sealed, are arranged between the stop surface 12 and the end of the inner sleeve 10 resting there and in the collar 17 between the inner sleeve 10 and the outer sleeve 11.
  • the mode of operation of the aeration nozzle is to be described below using a method for aerating wort.
  • the wort is fed to the liquid channel 2 via the connecting piece 13 with an overpressure between 3 and 5 bar and a volume flow of 0.5-200 m / h. Air with an overpressure of 3.5 - 8 bar and a volume flow of 2 - 100 1 / min. the annular chamber 3 supplied. Since the gas supply opening 4 has a cross-sectional area of at least 1 1/2 times the total area formed by the holes 5, the gas is distributed with an overpressure evenly in the annular chamber 3. The gas flows evenly through all holes 5 into the liquid channel 2 where it envelops the liquid in a network. Liquid and gas flow together through the tapered wall 6 into the mixing chamber 7. The liquid gas flow is reduced from the diameter d1 of the liquid channel 2 to the diameter d2 of the mixing chamber 7.
  • the reduction of the flow cross-section takes place sufficiently continuously, namely with the angle of inclination 7 ⁇ of at most 22 °, which the axis 8 of the outer wall of the liquid channel 2 forms with the tapered wall 6.
  • air and wort are mixed in a laminar manner so that turbulence is avoided become.
  • the aerated wort runs through a length of the mixing chamber 7 which corresponds to at least 1 1/2 times the diameter d2 of the mixing chamber 7.
  • the aerated wort is expanded into the expansion space 9 via a pressure gradient, an effective, extremely evenly distributed bubble formation being generated in the wort. This influences the flotation in such a way that extremely uniform foam blanket formation is achieved.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nozzles (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Cosmetics (AREA)
  • Devices For Dispensing Beverages (AREA)

Abstract

Une buse d'aération de liquides contenant des substances organiques, notamment d'aération de moût, permet d'introduire dans le liquide de fines bulles d'air. A cet effet, on introduit à travers de fines buses l'air sous surpression d'une chambre annulaire (3) qui entoure la canal de liquide (2) dans le courant de liquide qui s'écoule dans le canal de liquide.
EP91916556A 1990-09-21 1991-09-20 Buse d'aeration de liquides contenant des substances organiques Expired - Lifetime EP0550510B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4029982 1990-09-21
DE4029982A DE4029982C2 (de) 1990-09-21 1990-09-21 Vorrichtung zum Begasen einer Flüssigkeit
PCT/EP1991/001794 WO1992004972A1 (fr) 1990-09-21 1991-09-20 Buse d'aeration de liquides contenant des substances organiques

Publications (2)

Publication Number Publication Date
EP0550510A1 true EP0550510A1 (fr) 1993-07-14
EP0550510B1 EP0550510B1 (fr) 1994-12-21

Family

ID=6414725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91916556A Expired - Lifetime EP0550510B1 (fr) 1990-09-21 1991-09-20 Buse d'aeration de liquides contenant des substances organiques

Country Status (6)

Country Link
EP (1) EP0550510B1 (fr)
JP (1) JPH0811174B2 (fr)
AT (1) ATE115889T1 (fr)
DE (2) DE4029982C2 (fr)
ES (1) ES2066472T3 (fr)
WO (1) WO1992004972A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202019102925U1 (de) 2018-04-13 2019-07-17 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Oberflächenmodifiziertes Silikon sowie dieses enthaltendes Verbundmaterial

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DE9111657U1 (fr) * 1991-09-18 1991-11-14 Anton Steinecker Entwicklungs-Gmbh & Co., 8050 Freising, De
DE4206715C2 (de) * 1992-03-04 1997-06-26 Gaston M Wopfner Verfahren und Vorrichtung zum Einbringen eines Gases in eine Flüssigkeit
DE9302862U1 (fr) * 1993-02-26 1993-05-27 Anton Steinecker Entwicklungs Gmbh & Co, 8050 Freising, De
DE9303761U1 (fr) * 1993-03-15 1993-06-24 Hoechst Ag, 6230 Frankfurt, De
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DE4446000C2 (de) * 1994-12-22 1997-11-20 Hrch Huppmann Maschf Gmbh Vorrichtung zum Mischen zweier strömender Fluide, insbesondere zum Belüften von Würze für die Bierherstellung
AUPN683795A0 (en) * 1995-11-27 1995-12-21 Burns Philp Food Holdings Pty Limited A device for entraining a gas into a liquid
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DE202019102925U1 (de) 2018-04-13 2019-07-17 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Oberflächenmodifiziertes Silikon sowie dieses enthaltendes Verbundmaterial
WO2019197492A1 (fr) 2018-04-13 2019-10-17 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Silicone à surface modifiée, son utilisation dans des revêtements antiadhésifs et matériau composite la comprenant

Also Published As

Publication number Publication date
WO1992004972A1 (fr) 1992-04-02
JPH0811174B2 (ja) 1996-02-07
ATE115889T1 (de) 1995-01-15
JPH06502342A (ja) 1994-03-17
DE4029982C2 (de) 2000-08-10
DE59104001D1 (de) 1995-02-02
DE4029982A1 (de) 1992-03-26
EP0550510B1 (fr) 1994-12-21
ES2066472T3 (es) 1995-03-01

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