EP0885057B1 - Device for mixing gas in a liquid - Google Patents

Device for mixing gas in a liquid Download PDF

Info

Publication number
EP0885057B1
EP0885057B1 EP96910235A EP96910235A EP0885057B1 EP 0885057 B1 EP0885057 B1 EP 0885057B1 EP 96910235 A EP96910235 A EP 96910235A EP 96910235 A EP96910235 A EP 96910235A EP 0885057 B1 EP0885057 B1 EP 0885057B1
Authority
EP
European Patent Office
Prior art keywords
gas
tube
liquid
housing
inlet opening
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
EP96910235A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0885057A1 (en
Inventor
Björn O. JOHNSEN
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.)
Sinvent AS
Original Assignee
Sinvent AS
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 Sinvent AS filed Critical Sinvent AS
Publication of EP0885057A1 publication Critical patent/EP0885057A1/en
Application granted granted Critical
Publication of EP0885057B1 publication Critical patent/EP0885057B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2334—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
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
    • B01F23/454—Mixing liquids with liquids; Emulsifying using flow mixing by injecting a mixture of liquid and gas
    • 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
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/21—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers
    • 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

Definitions

  • the present invention concerns a device for adding a gas to a liquid, particularly for use in connection with fish rearing tanks and in cleaning technique, as stated in the introductory part of Claim 1.
  • the invention is particularly directed to use in rearing tanks.
  • Adding gas to a liquid may be effected for many reasons, such as to add anaesthetic gas when slaughtering fish in rearing tanks, for floatation basins in cleaning plants, adding oxygen to biofilters or for oxygenating the water in a rearing tank (tanks and large ponds).
  • Such tasks may today be performed with different equipment, such as diffusors, ejector pumps, O 2 -columns, pond airing and deep shaft systems.
  • US 4 844 843 discloses a device for adding gas to a liquid, at the same time as they are mixed.
  • the device comprises an elongated tube for supply of liquid and gas, and a stirring mechanism in the form of a motor driven propeller arranged by the outlet of the tube, for providing the liquid and the gas to be well mixed and that the mixture is driven out in the liquid reservoir.
  • a stirring mechanism in the form of a motor driven propeller arranged by the outlet of the tube, for providing the liquid and the gas to be well mixed and that the mixture is driven out in the liquid reservoir.
  • the jet should be controlled with respect to amount, pressure and direction, and thus give optimum tank hydraulics in different operating situations.
  • a device according to the present invention, generally designated 1.
  • the device 1 comprises a pump 2 having a motor 3 connected to an operation shaft 4.
  • a pump vane 5 At the outer end of the operating shaft 4 is connected a pump vane 5.
  • the operating shaft 4 is arranged within a cylindrical housing 6, which in operation is partly submerged in water as shown in the drawing with an imaginary water line.
  • a first inlet opening 8 for air situated over the water line, and below the water line is situated a second inlet opening 9 for water.
  • a gas tube 7, which is best illustrated in Fig. 2.
  • the gas tube 4 is at its upper end provided with an inlet opening for air and is at its lower end terminated in a nozzle 11, having openings 12 distributed around the circumference of the nozzle 11.
  • the nozzle 11 with the openings 12 is surrounded with a venturi 13 connected to a pump housing 14.
  • the gas tube 7 can be controlled in the longitudinal direction of housing 6, by means of a controlling means 15.
  • the controlling means 15 comprises an adjustment bracket 16 connected to housing 6, and which contains a mounting bracket 18.
  • the mounting bracket 18 is connected to a block 20 situated within housing 6.
  • Block 20 is mounted to an upper holding plate 21 connected to the gas tube 7, and movable relative to housing 6.
  • the upper holding plate 21 can move the gas tube 7, as the holding screw 19 slides in a slit (not shown) on the wall of the housing 6.
  • the gas tube can be moved up and down in the housing 6, as it slides in a lower holding plate 22, mounted to the inner wall of the housing 6.
  • a jet tube 23 which is bent 90° in fig.1, to extend parallel to the housing 6 along the substantial part of its length .
  • the jet tube 23 can also be positioned in other ways, for example, when rearing/breeding flatfish the jet tube 23 should be situated horizontally along the bottom of the rearing tank. Jet orifices 24 are situated along the jet tube 23, in its longitudinal direction.
  • the jet orifices have closure/controlling means (not shown), so that they can be individually closed, or controlled, respectively.
  • pressure controller 25 which functions as a pressure indicator and alarm transmitter.
  • the motor 3 will drive the operating axle 4 and thus the pump vane 5 into rotation. Water will be drawn in from the second inlet opening 9 into the pump housing, and ejected out through the jet orifices 24 of the jet tube 23. Additionally, air that a conventional pump would have rejected as false air, is drawn in through the first inlet opening 8, and sucked through the openings 12 of the nozzle 11 of the nozzle tube 7.
  • the air from the nozzle openings 12 is mixed into the water, in the forrn of bubbles. These bubbles are expanded in the underpressure created through the venturi 13.
  • the pump vane When water has passed the venturi 13, the pump vane will, by whipping, cause the bubbles to divide in a plurality of smaller bubbles,which will be betterdistributed in the water leaving the jet tube 23.
  • FIG. 3 In fig. 3 is shown a second example of an embodiment of the present invention.
  • air from the inlet opening 8 is not only sucked in by the pump vane 5, but also pumped in by a multiple step pump 27.
  • the device is provided with a float 26, to ensure correct operation level in the liquid.
  • Controlling the position of the nozzle 11 in relation to the venturi 13, and the velocity of the pump vane 5 can also be effected automatically. This may be performed by means of electrical and/or hydraulic means, based on the background of desired flow velocity / flow relations and O 2 -concentration.
  • the motor may be constructed horizontally and be situated below the water surface and may have a short axle to the pump vane. In such an embodynent the thermal energy of the motor may be transferred to the water of the tank.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Farming Of Fish And Shellfish (AREA)
  • Sampling And Sample Adjustment (AREA)
EP96910235A 1994-09-06 1996-03-05 Device for mixing gas in a liquid Expired - Lifetime EP0885057B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NO943285A NO180073C (no) 1994-09-06 1994-09-06 Anordning for tilsetting av en gass til en væske
CA002247262A CA2247262A1 (en) 1994-09-06 1996-03-05 Device for mixing gas in a liquid
PCT/NO1996/000047 WO1997032661A1 (en) 1994-09-06 1996-03-05 Device for mixing gas in a liquid
CN96180152A CN1213986A (zh) 1994-09-06 1996-03-05 将气体混入液体的装置

Publications (2)

Publication Number Publication Date
EP0885057A1 EP0885057A1 (en) 1998-12-23
EP0885057B1 true EP0885057B1 (en) 2001-09-12

Family

ID=27427466

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96910235A Expired - Lifetime EP0885057B1 (en) 1994-09-06 1996-03-05 Device for mixing gas in a liquid

Country Status (9)

Country Link
EP (1) EP0885057B1 (no)
CN (1) CN1213986A (no)
AU (1) AU710845B2 (no)
CA (1) CA2247262A1 (no)
DE (1) DE69615222T2 (no)
DK (1) DK0885057T3 (no)
ES (1) ES2163620T3 (no)
NO (1) NO180073C (no)
WO (1) WO1997032661A1 (no)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT276262B (de) * 1967-09-26 1969-11-25 Hubert Fuchs Misch-Aggregat zum Einbringen von beliebigen Zusatz-Stoffen als Sekundär-Komponenten in Flüssigkeiten bzw. stationäre Gewässer, insbesondere zur biologischen Reinigung von Wasser

Also Published As

Publication number Publication date
NO180073B (no) 1996-11-04
EP0885057A1 (en) 1998-12-23
CN1213986A (zh) 1999-04-14
AU5348596A (en) 1997-09-22
NO943285L (no) 1996-03-07
WO1997032661A1 (en) 1997-09-12
DK0885057T3 (da) 2002-01-21
AU710845B2 (en) 1999-09-30
CA2247262A1 (en) 1997-09-12
ES2163620T3 (es) 2002-02-01
DE69615222T2 (de) 2002-06-13
DE69615222D1 (de) 2001-10-18
NO180073C (no) 1997-02-12
NO943285D0 (no) 1994-09-06

Similar Documents

Publication Publication Date Title
AU701402B2 (en) Live well aerator and method for aeration
US5744072A (en) Method of treating waste water
US4817561A (en) Aquatic aeration and filtering system
US3814396A (en) Aeration apparatus
US5213718A (en) Aerator and conversion methods
EP0562314B1 (en) Water treatment equipment
US5938981A (en) Water aerator and circulation system
JP2003145190A (ja) 気曝装置
US5676889A (en) Apparatus for aerating and mixing liquids and/or gases
US4558990A (en) Composite pumping system
US4710325A (en) Aspirating aeration and liquid mixing apparatus
US4707308A (en) Apparatus for circulating water
JP2012125690A (ja) 貫流ポンプエアレ−ション装置
AU767572B2 (en) Multi-stage aerator
CA2222394A1 (en) A mixing and aeration unit
AU2005306515A1 (en) Device to treat liquid and foam
EP0002369B1 (en) Aerator and method of aerating liquid
EP0885057B1 (en) Device for mixing gas in a liquid
GB2230204A (en) Water aeration device
JP3020975B2 (ja) 気泡発生装置
JP2629164B2 (ja) 池水等の循環曝気装置
KR950007281Y1 (ko) 수처리용 혼합 폭기장치
KR970003062B1 (ko) 기액혼합장치
JP3936635B2 (ja) 流体対流ノズル装置
JPS6330555Y2 (no)

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19980921

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE DK ES FI FR GB IE IT NL PT SE

17Q First examination report despatched

Effective date: 20000105

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE DK ES FI FR GB IE IT NL PT SE

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

Ref country code: NL

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

Effective date: 20010912

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20010912

Ref country code: FR

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

Effective date: 20010912

Ref country code: FI

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

Effective date: 20010912

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 69615222

Country of ref document: DE

Date of ref document: 20011018

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

Ref country code: SE

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

Effective date: 20011212

Ref country code: PT

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

Effective date: 20011212

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2163620

Country of ref document: ES

Kind code of ref document: T3

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

Ref country code: GB

Payment date: 20020222

Year of fee payment: 7

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20020304

Year of fee payment: 7

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

Ref country code: IE

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

Effective date: 20020305

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

Ref country code: DE

Payment date: 20020309

Year of fee payment: 7

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

Ref country code: ES

Payment date: 20020320

Year of fee payment: 7

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

EN Fr: translation not filed
26N No opposition filed
REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

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

Ref country code: GB

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

Effective date: 20030305

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

Ref country code: ES

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

Effective date: 20030306

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

Ref country code: DK

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

Effective date: 20030331

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

Ref country code: DE

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

Effective date: 20031001

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030305

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030306