NO180073B - Apparatus for adding a gas to a liquid - Google Patents

Apparatus for adding a gas to a liquid Download PDF

Info

Publication number
NO180073B
NO180073B NO943285A NO943285A NO180073B NO 180073 B NO180073 B NO 180073B NO 943285 A NO943285 A NO 943285A NO 943285 A NO943285 A NO 943285A NO 180073 B NO180073 B NO 180073B
Authority
NO
Norway
Prior art keywords
gas
liquid
housing
nozzle
accordance
Prior art date
Application number
NO943285A
Other languages
Norwegian (no)
Other versions
NO943285L (en
NO943285D0 (en
NO180073C (en
Inventor
Bjoern O Johnsen
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
Priority to NO943285A priority Critical patent/NO180073C/en
Publication of NO943285D0 publication Critical patent/NO943285D0/en
Priority to ES96910235T priority patent/ES2163620T3/en
Priority to AU53485/96A priority patent/AU710845B2/en
Priority to DE69615222T priority patent/DE69615222T2/en
Priority to CN96180152A priority patent/CN1213986A/en
Priority to PCT/NO1996/000047 priority patent/WO1997032661A1/en
Priority to DK96910235T priority patent/DK0885057T3/en
Priority to CA002247262A priority patent/CA2247262A1/en
Priority to EP96910235A priority patent/EP0885057B1/en
Publication of NO943285L publication Critical patent/NO943285L/en
Publication of NO180073B publication Critical patent/NO180073B/en
Publication of NO180073C publication Critical patent/NO180073C/en

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

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)

Description

Foreliggende oppfinnelse angår en anordning for tilsetting av en gass til en væske, særlig for bruk i forbindelse med oppdrettskar og i renseteknikk, som angitt i den innledende delen av patentkrav 1. Oppfinnelsen retter seg særlig mot bruk i forbindelse med oppdrettskar. The present invention relates to a device for adding a gas to a liquid, particularly for use in connection with breeding vessels and in cleaning technology, as stated in the introductory part of patent claim 1. The invention is particularly directed to use in connection with breeding vessels.

Tilsetting av gass til en væske er aktuelt i flere sammenhenger, så som tilsetting av bedøvelsesgass ved slakting av fisk i oppdrettsanlegg, ved flotasjonsbasseng i renseanlegg, oksygentilsetting i biofilter og ved oksygenering av vannet i et oppdrettskar (merder og store dammer). Slike oppgaver kan idag utføres med forskjellig utstyr, så som diffusorer, ejektorpumper, 02-kolonner, damluftere og dypshaft-systemer. The addition of gas to a liquid is applicable in several contexts, such as the addition of anesthetic gas when slaughtering fish in fish farms, at flotation pools in purification plants, adding oxygen to biofilters and when oxygenating the water in a breeding vessel (cages and large ponds). Such tasks can today be carried out with different equipment, such as diffusers, ejector pumps, 02 columns, pond aerators and deep shaft systems.

Særlig i landbasert oppdrettsnæringen er det i den senere tid kommet forskjellige anordninger for å redusere vannforbruket, så som brofilter med diffusor. For å opprett-holde de riktige hydrauliske forhold i karene kreves da store energimengder ved bruk av mammutpumpeprinsippet (innblåsing av luft for å bevege vannet). Det vil være bortimot umulig å skape optimale hydrauliske forhold i et stort kar ved hjelp av denne teknologien. Especially in the land-based farming industry, various devices have recently been introduced to reduce water consumption, such as bridge filters with diffusers. In order to maintain the correct hydraulic conditions in the vessels, large amounts of energy are required using the mammoth pump principle (injection of air to move the water). It will be almost impossible to create optimal hydraulic conditions in a large vessel using this technology.

Fra US 4 844 843 er kjent en anordning for å tilsette gass til en væske, samtidig som dette blandes sammen. Anordningen omfatter et langstrakt rør for tilførsel av væske og gass, og der det ved utløpet av røret er anordnet en røreverk i form av en motordrevet propell, som sørger for at væsken og gassen blandes godt og at blandingen drives ut i væskereservoiret. Dersom det er ønskelig å øke tilførselen av gass til væskereservoiret, må hastigheten på propellen økes. Imidlertid vil endring av mengden av gass som tilsettes væsken ved denne kjente anordningen, gi som en bi-effekt at strømsettingen endres. Ved å øke hastigheten på propellen for å tilføre mer gass i væsken, vil også strømmen i reservoiret øke. From US 4 844 843 a device is known for adding gas to a liquid, while mixing it together. The device comprises an elongated pipe for the supply of liquid and gas, and where at the outlet of the pipe there is an agitator in the form of a motor-driven propeller, which ensures that the liquid and gas are well mixed and that the mixture is driven out into the liquid reservoir. If it is desired to increase the supply of gas to the liquid reservoir, the speed of the propeller must be increased. However, changing the amount of gas that is added to the liquid in this known device will give as a side effect that the current setting changes. By increasing the speed of the propeller to add more gas to the liquid, the flow in the reservoir will also increase.

Det er derfor et formål med foreliggende oppfinnelse å framskaffe en anordning for tilsetting av en gass til en væske, der mengen av tilsatt gass og bassenghydraulikken (strømningshastigheten) kan reguleres uavhengig av hverandre. Strålen skal kunne styres med hensyn på mengde, trykk og retning, og dermed gi optimal karhydraulikk i forskjellige driftssituasjoner. It is therefore an object of the present invention to provide a device for adding a gas to a liquid, where the amount of added gas and the pool hydraulics (flow rate) can be regulated independently of each other. The jet must be able to be controlled with regard to quantity, pressure and direction, thus providing optimal vessel hydraulics in different operating situations.

Oppfinnelsens formål oppnås med en anordning med trekk som angitt i den karak-teriserende delen av patentkrav 1. Ytterligere trekk framgår av de tilhørende uselv-stendige krav. The object of the invention is achieved with a device with features as indicated in the characterizing part of patent claim 1. Further features appear from the associated non-independent claims.

I det følgende skal opprinnelsen beskrives nærmere ved hjelp av eksempel på utførelse og med referanse til vedlagte tegninger, der In the following, the origin shall be described in more detail by means of an example of execution and with reference to the attached drawings, there

fig. 1 viser et langsgående snitt av en første, foretrukket utførelse av foreliggende oppfinnelse, fig. 1 shows a longitudinal section of a first, preferred embodiment of the present invention,

fig. 2 viser et langsgående snitt av venturirøret og dyserøret fra utførelsen i fig. 1, og fig. 3 viser et langsgående snitt av en andre utførelse av foreliggende oppfinnelse. fig. 2 shows a longitudinal section of the venturi tube and nozzle tube from the embodiment in fig. 1, and fig. 3 shows a longitudinal section of a second embodiment of the present invention.

Med først å referere til fig. 1 er vist en anordning i samsvar med foreliggende oppfinnelse, generelt benevnt 1. Anordningen 1 omfatter ei pumpe 2 som har en motor 3 tilkoplet en drivaksel 4. Ved den ytre enden av drivakselen 4 er tilkoplet en pumpeskovel 5. Drivakselen 4 er anbrakt innenfor et sylinderformet hus 6, som ved bruk er delvis ned-senket i vann som vist på figuren med en tenkt vannlinje. I huset 6 er det over vannlinjen anbrakt en første inntaksåpning 8 for luft, og under vannlinjen anbrakt en andre inntaksåpning 9 for vann. With first reference to fig. 1 shows a device in accordance with the present invention, generally referred to as 1. The device 1 comprises a pump 2 which has a motor 3 connected to a drive shaft 4. A pump vane 5 is connected to the outer end of the drive shaft 4. The drive shaft 4 is placed within a cylindrical housing 6, which during use is partially submerged in water as shown in the figure with an imaginary water line. In the housing 6, a first intake opening 8 for air is located above the water line, and a second intake opening 9 for water is located below the water line.

I senter av huset 6, omsluttende drivakselen 4 er anordnet et gassrør 7, som er vist mer i detalj i fig. 2. Gassrøret 4 er ved sin øvre ende utstyrt med en inntaksåpning for luft og er ved sin nedre ende avsluttet i ei dyse 11 med åpninger 12 anbrakt rundt dysas 11 peri-feri. Dysa 11 med åpningene 12 er omsluttet av en venturi 13 festet til et pumpehus 14. Gassrøret 7 kan regluleres i husets 6 lengderetning ved hjelp av reguleringsmidler 15. Reguleringsmidlene 15 omfatter en justeringsbrakett 16 festet til huset 6, og som holder en justeringsskrue 17. Justeringsskruen 17 er ved sin nedre ende i inngrep med en feste-brakett 18. Festebraketten 18 er festet til en innenfor huset 6 anbrakt kloss 20 som igjen er festet til ei øvre holdeskive 21 festet til gassrøret 7, og bevegelig i forhold til huset 6. Ved å løsne festeskruen 19 og rotere justeringsskruen 17 kan den øvre holdeskiva 21 bevege gassrøret 7, idet festeskruen 19 glir i et spor (ikke vist) på veggen av huset 6. Dermed vil gassrøret kunne beveges opp og ned i huset 6, idet det glir i ei nedre holdeskive 22, festet til innerveggen av huset 6. In the center of the housing 6, surrounding the drive shaft 4, a gas pipe 7 is arranged, which is shown in more detail in fig. 2. The gas pipe 4 is equipped at its upper end with an intake opening for air and is terminated at its lower end in a nozzle 11 with openings 12 located around the periphery of the nozzle 11. The nozzle 11 with the openings 12 is enclosed by a venturi 13 attached to a pump housing 14. The gas pipe 7 can be adjusted in the longitudinal direction of the housing 6 by means of adjustment means 15. The adjustment means 15 comprise an adjustment bracket 16 attached to the housing 6, which holds an adjustment screw 17. The adjustment screw 17 is engaged at its lower end with a fastening bracket 18. The fastening bracket 18 is attached to a block 20 placed inside the housing 6, which is in turn attached to an upper holding disc 21 attached to the gas pipe 7, and movable in relation to the housing 6. loosening the fastening screw 19 and rotating the adjusting screw 17, the upper retaining disc 21 can move the gas pipe 7, the fastening screw 19 sliding in a groove (not shown) on the wall of the housing 6. Thus, the gas pipe can be moved up and down in the housing 6, as it slides in a lower retaining disc 22, attached to the inner wall of the housing 6.

Perifert på pumpeskovelen 5 er plassert et strålerør 23, som på fig. 1 har en 90° knekk, og som strekker seg i det vesentligen av sin lengde parallelt med huset 6. Strålerøret 23 kan også posisjonerer på andre måter, f.eks. ved oppdrett av flatifsk bør strålerøret 23 legges horisontalt langs bunnen av oppdrettskaret. Langs strålerøret 23 er det i lengderetningen anordnet strålehull 24. Fortrinnsvis er strålehullene utstyrt med lukke/ reguleringsmidler (ikke vist), slik at de kan lukkes, hhv. reguleres individuelt. På strålerørets 23 avslutning, som i bruk står over vannflata, er det anordnet en pressostat 25, som har til funksjon å være trykkindikator og alarmgiver. A jet tube 23 is placed peripherally on the pump vane 5, as shown in fig. 1 has a 90° bend, and which extends essentially along its length parallel to the housing 6. The jet tube 23 can also be positioned in other ways, e.g. when farming flatfish, the radiation tube 23 should be laid horizontally along the bottom of the breeding vessel. Along the radiation pipe 23, radiation holes 24 are arranged in the longitudinal direction. Preferably, the radiation holes are equipped with closing/regulating means (not shown), so that they can be closed, respectively. regulated individually. At the end of the jet pipe 23, which in use is above the water surface, a pressure switch 25 is arranged, which has the function of being a pressure indicator and alarm transmitter.

I bruk vil motoren 3 sette drivakselen 4 og dermed pumpeskovelen 5 i rotasjon. Dermed trekkes vann inn fra andre inntaksåpning 9 i pumpehuset, og presses ut gjennom strålehullene 24 i strålerøret 23.1 tillegg vil luft, som ved en konvensjonell pumpe ville ha blitt betraktet som falskluft, trekkes inn gjennom den første inntaksåpningen 8, og suges gjennom åpningene 12 i dysa 11 på dyserøret 7. In use, the motor 3 will set the drive shaft 4 and thus the pump vane 5 in rotation. Thus, water is drawn in from the second intake opening 9 in the pump housing, and is pushed out through the jet holes 24 in the jet pipe 23.1 in addition, air, which would have been considered false air in a conventional pump, will be drawn in through the first intake opening 8, and sucked through the openings 12 in nozzle 11 on the nozzle pipe 7.

Lufta fra dyseåpningene 12 blander seg i vannet, i form av bobler. Disse boblene ut-vider seg i undertrykket som skapes gjennom ventrurien 13. Når vannet har passert venturien 13, vil ved pisking i pumpehuset 14 ved pumpeskovelen 5 medføre at boblene deles opp i flere mindre bobler, som så blir bedre fordelt i vannet som føres ut av strålerøret 23. The air from the nozzle openings 12 mixes in the water, in the form of bubbles. These bubbles expand in the negative pressure created through the venturi 13. When the water has passed the venturi 13, whipping in the pump housing 14 by the pump vane 5 will cause the bubbles to split into several smaller bubbles, which are then better distributed in the water that is discharged of the radiation tube 23.

Dersom dyserørets 7 posisjon i forhold til venturien 13 endres, vil større, hhv. mindre mengde vann/luft dras inn og blandes i pumpehuset 14. Denne effekten oppnås ved at venturivirkningen endres og vanninntakstverrsnittet endres og dermed vannhastigheten i venturien og mengde vann i pumpehuset 14. Dersom det er ønskelig med endring i strøm-ningshastigheten i karet, vil dette kunne gjøres ved å endre hastigheten på pumpeskovelen 5. Dette kan også oppnås ved å endre vanninntakstverrsnittet ved endring av dysens 11 posisjon i venturien 13. Effekten av innblandet gass og/eller strømningshastigheten kan forsterkes, hhv. reduseres ved å endre åpningstverrsnitt og antall strålehull 24 som er åpne på strålerøret 23. Dermed kan en og samme pumpe anvendes over et stort bruksområde, så som for bedre omrøring, til fisk av forskjellig størrelse (i oppdrettskar), og ved flotasjon av partikler av forskjellig størrelse (ved renseanlegg). If the position of the nozzle tube 7 in relation to the venturi 13 changes, larger, or a smaller amount of water/air is drawn in and mixed in the pump housing 14. This effect is achieved by the venturi effect changing and the water intake cross-section changing and thus the water velocity in the venturi and the amount of water in the pump housing 14. If a change in the flow rate in the vessel is desired, this will could be done by changing the speed of the pump vane 5. This can also be achieved by changing the water intake cross-section by changing the position of the nozzle 11 in the venturi 13. The effect of mixed gas and/or the flow rate can be enhanced, respectively. can be reduced by changing the opening cross-section and the number of jet holes 24 that are open on the jet tube 23. Thus, one and the same pump can be used over a large area of use, such as for better agitation, for fish of different sizes (in breeding tanks), and for flotation of particles of different size (at treatment plants).

I fig. 3 er vist et andre eksempel på utførelse av foreliggende oppfinnelse. Her blir luft fra inntaksåpningen 8 ikke bare sugd inn ved hjelp av pumpeskovelen 5, men blir også pumpet inn ved ei flertrinnespumpe 27. Anordningen er i tillegg utstyrt med en flottør 26, for å sikre at den holdes i korrekt arbeidshøyde i væsken. In fig. 3 shows a second example of the embodiment of the present invention. Here, air from the intake opening 8 is not only sucked in by means of the pump vane 5, but is also pumped in by a multi-stage pump 27. The device is also equipped with a float 26, to ensure that it is kept at the correct working height in the liquid.

Reguleringen av dysens 11 posisjon i forhold til venturien 13, samt hastigheten på pumpeskovelen 5 kan også styres automatisk. Dette kan skje ved hjelp av elektriske og/eller hydrauliske midler, og på bakgrunn av ønsket strømningshastighet/strømnings-forhold og 02-konsentrasjon. The regulation of the position of the nozzle 11 in relation to the venturi 13, as well as the speed of the pump vane 5 can also be controlled automatically. This can be done with the help of electrical and/or hydraulic means, and on the basis of the desired flow rate/flow ratio and 02 concentration.

En fagmann på området vil se at også andre utførelser er mulig innenfor oppfinnelsens rekkevidde. Således kan f. eks. motoren konstrueres vanntett og plasseres under vann, med en kort aksel til pumpeskovelen. Ved en slik utførelse oppnås at varmeenergien fra motoren tilføres vannet i karet. A person skilled in the art will see that other designs are also possible within the scope of the invention. Thus, e.g. the motor is constructed waterproof and placed under water, with a short shaft to the pump vane. With such a design, it is achieved that the heat energy from the motor is supplied to the water in the tub.

Claims (6)

1. Anordning for tilsetting av en gass til en væske, omfattende et langstrakt hus (6) som er nedsenkbar i væsken, hvilket hus (6) har en første inntaksåpning (8) for gass, og en andre inntaksåpning (9) for væske, idet det i huset (6) er anordnet et gassrør (7) som ved sin første ende kommuniserer med den første inntaksåpningen (8) for gass, og en aksel (4) som ved sin ene ende er tilknyttet en motor (3), og ved sin andre ende er utstyrt med en pumpeskovel (5), og en blanding av gass og væske føres ut i nærheten av pumpeskovelen (5), karakterisert ved at gassrøret (7) ved sin andre ende er utstyrt med ei dyse (11) med dyseåpninger (12), idet dysa (11) står i en venturi (13), og at gassrøret (7) er regulerbart i lengderetningen ved hjelp av reguleringsmidler (15), slik at posisjonen til dysa (11) i forhold til venturien (13) kan endres.1. Device for adding a gas to a liquid, comprising an elongated housing (6) which can be immersed in the liquid, which housing (6) has a first intake opening (8) for gas, and a second intake opening (9) for liquid, in that the housing (6) has a gas pipe (7) which at its first end communicates with the first intake opening (8) for gas, and a shaft (4) which is connected to a motor (3) at one end, and at its other end is equipped with a pump vane (5), and a mixture of gas and liquid is discharged near the pump vane (5), characterized in that the gas pipe (7) is equipped at its other end with a nozzle (11) with nozzle openings (12), the nozzle (11) being in a venturi (13), and that the gas pipe (7) can be adjusted in the longitudinal direction using of regulating means (15), so that the position of the nozzle (11) in relation to the venturi (13) can be changed. 2. Anordning i samsvar med krav 1, karakterisert ved at det i huset (6) videre er anordnet ei gasspumpe (27) som pumper gass inn i gassrøret (7).2. Device in accordance with claim 1, characterized in that a gas pump (27) is also arranged in the housing (6) which pumps gas into the gas pipe (7). 3. Anordning i samsvar med krav 1-2, karakterisert ved at reguleringsmidlene (15) omfatter en justeringsskrue (17) som ved rotasjon er anordnet for å bevege gassrøret (7) og en festeskrue (19) anordnet for å feste gassrøret (7) i ønsket posisjon innstilt ved justeringsskruen (17).3. Device in accordance with requirements 1-2, characterized in that the regulating means (15) comprise an adjustment screw (17) which, when rotated, is arranged to move the gas pipe (7) and a fastening screw (19) arranged to secure the gas pipe (7) in the desired position set by the adjustment screw (17). 4. Anordning i samsvar med krav 1-3, karakterisert ved at det utenfor pumpeskovelen (5) er anordnet et strålerør (23), som er utstyrt med strålehull (24).4. Device in accordance with requirements 1-3, characterized in that a jet pipe (23) is arranged outside the pump vane (5), which is equipped with a jet hole (24). 5. Anordning i samsvar med krav 1-4, karakterisert ved at størrelsen på strålehullene (24) kan reguleres individuelt.5. Device in accordance with requirements 1-4, characterized in that the size of the beam holes (24) can be individually regulated. 6. Anordning i samsvar med krav 1-5, karakterisert ved at strålehullene (24) er anordnet for å kunne lukkes, hhv. åpnes individuelt.6. Device in accordance with claims 1-5, characterized in that the beam holes (24) are arranged to be closed, respectively. are opened individually.
NO943285A 1994-09-06 1994-09-06 Device for adding a gas to a liquid NO180073C (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
NO943285A NO180073C (en) 1994-09-06 1994-09-06 Device for adding a gas to a liquid
EP96910235A EP0885057B1 (en) 1994-09-06 1996-03-05 Device for mixing gas in a liquid
CN96180152A CN1213986A (en) 1994-09-06 1996-03-05 Device for mixing gas in liquid
AU53485/96A AU710845B2 (en) 1994-09-06 1996-03-05 Device for mixing gas in a liquid
DE69615222T DE69615222T2 (en) 1994-09-06 1996-03-05 DEVICE FOR MIXING GAS IN LIQUIDS
ES96910235T ES2163620T3 (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
DK96910235T DK0885057T3 (en) 1994-09-06 1996-03-05 Device for adding a gas to a liquid
CA002247262A CA2247262A1 (en) 1994-09-06 1996-03-05 Device for mixing gas in a liquid

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NO943285A NO180073C (en) 1994-09-06 1994-09-06 Device for adding a gas to a liquid
CN96180152A CN1213986A (en) 1994-09-06 1996-03-05 Device for mixing gas in liquid
PCT/NO1996/000047 WO1997032661A1 (en) 1994-09-06 1996-03-05 Device for mixing gas in a liquid
CA002247262A CA2247262A1 (en) 1994-09-06 1996-03-05 Device for mixing gas in a liquid

Publications (4)

Publication Number Publication Date
NO943285D0 NO943285D0 (en) 1994-09-06
NO943285L NO943285L (en) 1996-03-07
NO180073B true NO180073B (en) 1996-11-04
NO180073C NO180073C (en) 1997-02-12

Family

ID=27427466

Family Applications (1)

Application Number Title Priority Date Filing Date
NO943285A NO180073C (en) 1994-09-06 1994-09-06 Device for adding a gas to a liquid

Country Status (9)

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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT276262B (en) * 1967-09-26 1969-11-25 Hubert Fuchs Mixing unit for introducing any additional substances as secondary components into liquids or stationary waters, in particular for the biological purification of water

Also Published As

Publication number Publication date
DE69615222T2 (en) 2002-06-13
DE69615222D1 (en) 2001-10-18
ES2163620T3 (en) 2002-02-01
CA2247262A1 (en) 1997-09-12
EP0885057B1 (en) 2001-09-12
AU5348596A (en) 1997-09-22
NO943285L (en) 1996-03-07
DK0885057T3 (en) 2002-01-21
EP0885057A1 (en) 1998-12-23
WO1997032661A1 (en) 1997-09-12
NO943285D0 (en) 1994-09-06
AU710845B2 (en) 1999-09-30
NO180073C (en) 1997-02-12
CN1213986A (en) 1999-04-14

Similar Documents

Publication Publication Date Title
US5632220A (en) Thru-hull mounted aerator with anti-vapor lock mechanism and method for aeration
US4308138A (en) Treating means for bodies of water
US4749493A (en) Method and apparatus for oxygenating water
US6050550A (en) Apparatus for aeration and bottom agitation for aqua-culture systems
BRPI0905117A2 (en) aquaculture oxygenation
US4844843A (en) Waste water aerator having rotating compression blades
US5938981A (en) Water aerator and circulation system
US4806251A (en) Oscillating propeller type aerator apparatus and method
US5676889A (en) Apparatus for aerating and mixing liquids and/or gases
JP2003145190A (en) Aerator
US4558990A (en) Composite pumping system
WO2019144532A1 (en) Oxygen dissolving apparatus for ponds
WO2005030377A1 (en) Method and apparatus for mixing of two fluids
KR100988361B1 (en) apparatus for dissolving oxygen
WO2017094647A1 (en) Swirl-flow gas-liquid mixing device for aquaculture
TWI652010B (en) Floating suspended pool warming aeration oxygenation device
NO180073B (en) Apparatus for adding a gas to a liquid
NO20180486A1 (en) Apparatus for enriching a water environment and method thereof
US11622545B1 (en) Circulating water system for intensive aquaculture
KR100398932B1 (en) Bubble―powered zooplankton grazing wheel
US3850131A (en) Mobile liquid-aerating pump
CA2166402C (en) A device for aiding the solubilization of gases in liquids
KR970003062B1 (en) Gas and liquid mixer
NO315029B1 (en) Process and plant for dissolving gas in a liquid, and using the same
NO160492B (en) AIR INHIBITOR FOR INTRODUCING AIR OR OTHER GAS SPECIES IN A FLUID.