WO1997032661A1 - Dispositif servant a melanger un gaz dans un liquide - Google Patents

Dispositif servant a melanger un gaz dans un liquide Download PDF

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Publication number
WO1997032661A1
WO1997032661A1 PCT/NO1996/000047 NO9600047W WO9732661A1 WO 1997032661 A1 WO1997032661 A1 WO 1997032661A1 NO 9600047 W NO9600047 W NO 9600047W WO 9732661 A1 WO9732661 A1 WO 9732661A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
liquid
housing
nozzle
tube
Prior art date
Application number
PCT/NO1996/000047
Other languages
English (en)
Inventor
Björn O. JOHNSEN
Original Assignee
Sinvent A.S
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
Priority to NO943285A priority Critical patent/NO180073C/no
Application filed by Sinvent A.S filed Critical Sinvent A.S
Priority to DE69615222T priority patent/DE69615222T2/de
Priority to AU53485/96A priority patent/AU710845B2/en
Priority to DK96910235T priority patent/DK0885057T3/da
Priority to CN96180152A priority patent/CN1213986A/zh
Priority to ES96910235T priority patent/ES2163620T3/es
Priority to CA002247262A priority patent/CA2247262A1/fr
Priority to EP96910235A priority patent/EP0885057B1/fr
Priority to PCT/NO1996/000047 priority patent/WO1997032661A1/fr
Publication of WO1997032661A1 publication Critical patent/WO1997032661A1/fr

Links

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 done 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 inthe 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. If increasing the gas supply to the liquid reservoir is desirable, the speed of the propeller is increased. However, an increase in the amount of gas added to the liquid in this known device, will have the side effect of changing the current rela- tionship. By increasing the speed of the propeller to supply more gas to the liquid, also the current in the reservoir will also increase.
  • the jet should be controlled as to amount, pressure and direction, and thus give optimum tank hydraulics in different operating situations.
  • Fig. 1 shows a longitudinal section view of a first, preferred embodiment of the present invention
  • Fig. 2 shows a longitudinal section view of the venturi pipe and the nozzle pipe from the embodiment of Fig. 1, and
  • Fig. 3 shows a longitudinal section view of a second embodiment of the present invention.
  • a device according to the present invention, generally denoted 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 imagined water line.
  • a first inlet In the house 6 is a first inlet
  • 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
  • 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 con-
  • Block 20 is mounted to an upper holding plate 21 connected to the glass tube 7, and movable relative to housing 6.
  • the upper holding plate 21 can move the glass tube 7, as the holding screw 19 slides in a slit (not shown) on the wall of the housing 6.
  • the glass tube can be moved up and down in the housing 6,
  • a jet tube 23 which is bent 90°, to extend the substantial of its length parallel with the housing 6.
  • the jet tube 23 can also be positioned in other ways, for example when rearing flat fish, 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 clos ⁇ ure/controlling means (not shown), so that they can be individually closed, or controlled, respectively.
  • a 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 form 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, that will be better distributed in the water leav ⁇ ing the jet tube 23.
  • 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 controlled automatically. This can 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 can be constructed horizontal and situ ⁇ ated below the water surface, having a short axle to the pump vane. In such an embodi- ment the thermal energy of the motor is supplied 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)

Abstract

Ce dispositif servant à ajouter un gaz à un liquide comprend un logement (6) de forme allongée que l'on peut immerger dans le liquide et qui présente deux ouvertures d'entrée (8, 9) l'une pour le gaz, l'autre pour le liquide. Un axe (4) placé dans le logement (6) est relié, au niveau de sa première extrémité, à un moteur (2) et il est pourvu, au niveau de sa seconde extrémité, d'une palette de pompe (5), un mélange de gaz et de liquide étant déchargé au voisinage de cette palette (5). Un tube à gaz (7), placé dans le logement (6) communique avec la première ouverture (8) destinée au gaz, et il est pourvu d'une buse (11) présentant des orifices (12). Cette buse (11) est logée dans un venturi (13) et le tube à gaz (7) peut être commandé longitudinalement, de manière à pouvoir faire changer la position de la buse (11) par rapport au venturi (13).
PCT/NO1996/000047 1994-09-06 1996-03-05 Dispositif servant a melanger un gaz dans un liquide WO1997032661A1 (fr)

Priority Applications (9)

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
DE69615222T DE69615222T2 (de) 1994-09-06 1996-03-05 Vorrichtung zum mischen von gas in flüssigkeiten
AU53485/96A AU710845B2 (en) 1994-09-06 1996-03-05 Device for mixing gas in a liquid
DK96910235T DK0885057T3 (da) 1994-09-06 1996-03-05 Indretning til tilsætning af en gas til en væske
CN96180152A CN1213986A (zh) 1994-09-06 1996-03-05 将气体混入液体的装置
ES96910235T ES2163620T3 (es) 1994-09-06 1996-03-05 Dispositivo para mezclar gas en un liquido.
CA002247262A CA2247262A1 (fr) 1994-09-06 1996-03-05 Dispositif servant a melanger un gaz dans un liquide
EP96910235A EP0885057B1 (fr) 1994-09-06 1996-03-05 Dispositif servant a melanger un gaz dans un liquide
PCT/NO1996/000047 WO1997032661A1 (fr) 1994-09-06 1996-03-05 Dispositif servant a melanger un gaz dans un liquide

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
CN96180152A CN1213986A (zh) 1994-09-06 1996-03-05 将气体混入液体的装置
CA002247262A CA2247262A1 (fr) 1994-09-06 1996-03-05 Dispositif servant a melanger un gaz dans un liquide
PCT/NO1996/000047 WO1997032661A1 (fr) 1994-09-06 1996-03-05 Dispositif servant a melanger un gaz dans un liquide

Publications (1)

Publication Number Publication Date
WO1997032661A1 true WO1997032661A1 (fr) 1997-09-12

Family

ID=27427466

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1996/000047 WO1997032661A1 (fr) 1994-09-06 1996-03-05 Dispositif servant a melanger un gaz dans un liquide

Country Status (9)

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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH497913A (de) * 1967-09-26 1970-10-31 Fuchs Hubert Aggregat zur Herstellung von Gemischen, Lösungen, Emulsionen und Suspensionen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH497913A (de) * 1967-09-26 1970-10-31 Fuchs Hubert Aggregat zur Herstellung von Gemischen, Lösungen, Emulsionen und Suspensionen

Also Published As

Publication number Publication date
CA2247262A1 (fr) 1997-09-12
NO180073C (no) 1997-02-12
NO180073B (no) 1996-11-04
AU710845B2 (en) 1999-09-30
EP0885057A1 (fr) 1998-12-23
DE69615222D1 (de) 2001-10-18
ES2163620T3 (es) 2002-02-01
DE69615222T2 (de) 2002-06-13
NO943285D0 (no) 1994-09-06
AU5348596A (en) 1997-09-22
CN1213986A (zh) 1999-04-14
NO943285L (no) 1996-03-07
EP0885057B1 (fr) 2001-09-12
DK0885057T3 (da) 2002-01-21

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