WO1981001700A1 - Procede et appareil de dissolution d'un gaz dans un liquide - Google Patents

Procede et appareil de dissolution d'un gaz dans un liquide Download PDF

Info

Publication number
WO1981001700A1
WO1981001700A1 PCT/GB1980/000217 GB8000217W WO8101700A1 WO 1981001700 A1 WO1981001700 A1 WO 1981001700A1 GB 8000217 W GB8000217 W GB 8000217W WO 8101700 A1 WO8101700 A1 WO 8101700A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
chamber
gas
stream
outlet
Prior art date
Application number
PCT/GB1980/000217
Other languages
English (en)
Inventor
R Keene
O Kite
M Garrett
Original Assignee
Boc Ltd
R Keene
O Kite
M Garrett
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 Boc Ltd, R Keene, O Kite, M Garrett filed Critical Boc Ltd
Publication of WO1981001700A1 publication Critical patent/WO1981001700A1/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
    • B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
    • B01F23/2326—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles adding the flowing main component by suction means, e.g. using an ejector
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1278—Provisions for mixing or aeration of the mixed liquor
    • C02F3/1289—Aeration by saturation under super-atmospheric pressure
    • 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
    • B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
    • 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
    • B01F23/2366—Parts; Accessories
    • B01F23/2368—Mixing receptacles, e.g. tanks, vessels or reactors, being completely closed, e.g. hermetically closed
    • 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
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • 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
    • B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
    • B01F25/53—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle in which the mixture is discharged from and reintroduced into a receptacle through a recirculation tube, into which an additional component is introduced
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1278—Provisions for mixing or aeration of the mixed liquor
    • C02F3/1294—"Venturi" aeration means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • This invention relates to a method and apparatus for dissolving gas in a liquid in which the gas is sparingly soluble.
  • a large number of different devices are known for dissolving oxygen in waste water or sewage.
  • One kind of device that we prefer employs two concentric cylindrical chambers, one being of greater diameter than the other.
  • the bottom of the chamber of smaller diameter lies in substantially the same plane as the top of the chamber of larger diameter.
  • An annular flange is fitted between the lower end of the upper chamber and the upper end of the lower chamber so as to make a fluid- tight seal therebetween.
  • Waste water containing oxygen is introduced into the top of the upper chamber and is caused to flow downwards into and through the lower chamber.
  • the flow of liquid through the upper chamber is such as to give a prolonged contact time between the bubbles of oxygen and the waste water.
  • the two chambers are located above a vessel containing a body of waste water to be oxygenated and the waste water is pumped from this vessel to the chambers.
  • a vessel containing a body of waste water to be oxygenated a body of waste water to be oxygenated
  • the waste water is pumped from this vessel to the chambers.
  • the annular plate forming a seal between the two chambers is subjected to a force of several tons which can cause flexure of the plate and consequential leakage. It is possible to reinforce the plate internally of the lower chamber but this in turn gives rise to constructional difficulties and may also adversely effect the efficiency of the oxygen dissolving equipment. For example, if crude sewage is being oxygenated, rags and other materials in the sewage may be collected on the supports and in time cause a blockage.
  • a method of dissolving gas in a liquid in which the gas is sparingly soluble comprising the steps of:
  • the invention also provides apparatus for dissolving gas in a liquid in which the gas is sparingly soluble, comprising a bubble- liquid contact chamber having an outlet vertically below an inlet whereby a stream of liquid containing gas bubbles is able to be passed vertically downwards through the chamber, and a bubble-liquid disengagement chamber which defines a generally horizontal passage for the stream of liquid, the outlet of the contact chamber terminating in or otherwise communicating with the disengagement chamber, whereby in operation of the apparatus, the stream of liquid is caused to change its direction of flow from the vertical to one that is generally horizontal thereby creating turbulence, and the disengagement chamber having an outlet for liquid and an outlet for gas, the outlet for gas being positioned so as to communicate in operation of the apparatus with a gas space in which gas is collected from the liquid flowing through the disengagement chamber.
  • the method and apparatus according to the invention are particularly suitable for dissolving oxygen in waste water or sewage.
  • the chosen average velocity of liquid flow through the contact chamber is generally chosen to be such as to provide a compromise between the need for a prolonged contact time and the need to avoid coalescence of gas bubbles in the contact chamber.
  • liquid velocity at the contact chamber is chosen to be at least 0.3 metres per second.
  • the contact chamber has an inlet comprising a pipe of smaller cross-section than the chamber, the said pipe communicating with a source of the gas and a source of the liquid. Since the cross- section of the pipe is smaller than that of the contact chamber, the liquid will undergo a decrease in velocity as it flows from the pipe to the other chamber, and therefore the relative dimensions of the pipe and the contact chamber can be chosen to as to give a desired liquid flow velocity through the chamber.
  • oxygen may be introduced into the pipe through a venturi.
  • the oxygen may be supplied from any convenient source.
  • gas passing out of the gas space is preferably returned to the contact chamber via the aforesaid pipe.
  • the venturi will create turbulence in the liquid, though, if desired, other means may be used for this purpose.
  • the disengagement chamber separates undissolved bubbles of gas from the liquid. We believe the turbulence created by changing the direction of flow of the liquid helps in coalescing the undissolved gas bubbles to form larger bubbles which will rise to the top of the disengagement chamber and thus form a gas space therein.
  • both chambers are generally cylindrical, the axes of the two cylinders being substantially perpendicular to one another.
  • the diameter of the disengagement chamber is preferably at least twice that of the contact chamber, (or at least twice the maximum diameter of the contact chamber, if, for example, it is conical.)
  • the velocity of the stream of liquid in the disengagement chamber is up to 0.075 metres per second.
  • the diameter of the disengagement chamber can typically be two to three times that of the contact chamber. This represents an improvement over the aforementioned kind of gas dissolution apparatus which employs concentric chamber, in which the diameter of the lower coalesing chamber is typically five times that of the upper (contact) chamber.
  • the disengagement chamber is elongate, ie its axial length is preferably at least 2.5 times its diameter.
  • Use of an elongate disengagement chamber keeps down the number of gas bubbles (if any) which leave the apparatus according to the invention with the liquid stream, not having being disengaged therefrom.
  • both the chambers are generally cylindrical in shape, this is not essential to the invention.
  • the contact chamber may, for example, be of divergent cross-section with its outlet wider than its inlet.
  • the outlet of the contact chamber protrudes into the interior of the disengagement chamber from thereabove. This helps to avoid bubbles of gas rising from the disengagement chamber into the contact chamber. Gas bubbles will tend to rise to the top of the disengagement cha-mber and form a gas pocket there.
  • the vertical extent of the protrusion of the outlet of the contact chamber into the disengagement chamber is less than 5 cm. In such an arrangement it is unlikely that any objects such as rags which may be present in the waste water or sewage will become entagled with the outlet of the contact chamber, Indeed, it is an advantage of such an apparatus according to the present invention that it can be constructed without any substantial internal projections or reinforcements which would tend to collect objects such as rags in operation of the apparatus.
  • the disengagement chamber has dished end-pieces.
  • the end-pieces are typically welded to the ends of the disengagement chamber.
  • the top of the contact chamber may be of analogous construction.
  • the outlet of the contact chamber communicates with the top of the interior of the disengagement chamber at or towards one end thereof, there being a gas collection chamber communicating with the top of the interior of the disengagement at or towards the other end, and the outlet for liquid being situated at said other end.
  • the liquid outlet is constituted by an aperture in a dished end-piece.
  • the axis of the disengagement chamber is preferably at an angle not greater than 1° to the horizontal, the end at which the liquid outlet is situated being the higher.
  • Such an arrangement helps to create an elongate gas-liquid contact zone at the top of the disengagement chamber. We believe that such a zone assists in the overall gas dissolution process.
  • a bubble-liquid contact chamber for contacting bubbles of said gas with the stream of said liquid, some of the bubbles thereby dissolving said liquid, said contact chamber being of generally larger cross-sectional area than said pipe, being open at its base and communicating with said pipe;
  • a gas recycle pipeline for recycling gas collecting at the top of said disengagement chamber to said pipe, the pipeline having an inlet in communication with the top of the disengagement chamber at a location remote from said one end thereof, and an outlet communicating with said pipe.
  • the contact chamber and the disengagement chamber can both be readily constructed with dished ends and welds to withstand the pressures to which they are subjected in use.
  • the contact chamber and the disengagement chamber can both be readily constructed with dished ends and welds to withstand the pressures to which they are subjected in use.
  • there to be a horizontal flow path in a cylindrical disengagement chamber we believe that is is possible to reduce the diameter of such chamber in comparison with that of the lower chamber of the known apparatus described hereinabove without reducing the amount of gas that can be dissolved during the passage of the liquid through the apparatus.
  • Figure 1 is a schematic side view of apparatus according to the invention
  • Figure 2 is a schematic plan view of the apparatus shown in Figure 1.
  • the illustrated apparatus has an inlet pipe 2 for waste water.
  • the pipe 2 is formed with a venturi 4.
  • an oxygen inlet pipe 6 In communication with the throat 4 of the venturi is an oxygen inlet pipe 6.
  • This pipe 6 is connected to a source of oxygen (not shown).
  • an oxygen recycle pipe 32 Also in communicationwith the throat of the venturi is an oxygen recycle pipe 32.
  • the pipe 2 is vertically disposed and communicates with a right- cylindrical chamber 8 which is also vertically disposed.
  • Chamber 8 has an upper end 10 and a lower end 12.
  • the lower end 12 is open but the upper end 10 is constituted by a dished end piece which is welded to th main body of the chamber 8.
  • the lower or outlet end 12 protrudes into the top of a lower chamber 15.
  • the chamber 16 is a hollow right cylinder with its longitudinal axis being generally horizontal. In fact, this axis is at an angle of less than 1° to the horizontal by virtue of the wedge 20 which is interposed between the bottom of the chamber 16 and a floor 18 on which the chamber 16 is supported.
  • the wedge 20 has a support surface of a shape complementary to that of the bottom of the chamber 16.
  • the vertical extent of the part of the chamber that protrudes into the chamber 16 is only 2 to 3 cm.
  • the chamber 8 is situated generally at one end 26 thereof.
  • a gas collection chamber 24 communicates with the top of the chamber 16 through an outlet 21.
  • the ends 26 and 28 of the chamber 16 are in the form of dished end pieces that are welded to the main body of the chamber. In communication with the chamber through the end piece 28 is a liquid outlet pipe 34.
  • the gas collection chamber 24 is generally cylindrical in shape and has at its top a dished plate 30 which is welded to the main body of the chamber 24.
  • the gas recycle pipe 32 Communicating with the gas collection chamber 24 through the end plate 30 is the gas recycle pipe 32.
  • a conduit 38 In communication with the recycle pipe 32 is a conduit 38 having a valve 40 disposed therein.
  • the outlet 42 of the conduit 38 communicates with the atmosphere.
  • the diameter of the chamber 8 is a half to a third that of the chamber 16.
  • the diameter of the chamber 24 is half that of the chamber 8.
  • sewage is passed continuously into the inlet pipe 2. As it passes through the venturi 4 it creates a suction which draws or helps to draw oxygen into the sewage from the pipes 6 and 32.
  • the turbulence created by the venturi in the liquid helps to form relatively small bubbles of oxygen. These bubbles are carried downwards in the vertically descending stream of sewage.
  • the stream of sewage then enters the chamber 8. Since the chamber 8 is of greater diameter than the chamber 4 the liquid undergoes a reduction in its velocity. This tends to increase the average residence time of the bubbles in the liquid and thus many of the bubbles dissolve in the liquid as.it passes through the chamber 8. Not all the bubbles of oxygen are so dissolved.
  • the direction of flow of the stream through the chamber 16 is generally horizontal.
  • the liquid changes its direction of flow from one that is vertical to one that is horizontal after entering the chamber 16.
  • the turbulence helps to cause bubbles of gas in the sewage to coalesce and form larger bubbles which owing to their increased buoyancy tend to rise to the top of the chamber 16 rather than re-enter the chamber 8.
  • the bubbles tend not to re-enter the chamber 8 in view of the head of liquid therein.
  • a pocket 22 of gas thus builds up at the top of the chamber 16 extending from the right hand side as shown of the chamber 8 to the end 28 of the chamber 16. Since the end 28 is slightly higher than the end 26, the depth of the gas pocket 22 increases towards the end 28 of the chamber 16. Gas passes from the pocket 22 into the gas collection chamber 24 and thence to the pipe 32 from which it re-enters the liquid flowing through the pipe 2. Thus, an excessive gas pressure is not built up in the chamber 16, and the pocket 22 remains relatively shallow. Furthermore, a flow of oxygen gas along the surface of the liquid in the chamber 16 tends to be created by the suction caused by the venturi 4 in the pipeline 32. Some of the oxygen will tend to dissolve as it flows along the surface of the liquid.
  • the chamber 16 is sufficiently long for substantially all the gas bubbles to have become disengaged from the sewage in the chamber 16. (Typically its axial length is two and a half times its diameter.) Thus, the oxygenated liquid leaving the chamber 16 through the outlet 34 contains relatively few, if any, undissolved bubbles of oxygen.
  • the valve 40 may be opened at start-up of the apparatus so as to allow nitrogen and other gas in the chambers to be vented therefrom. If desired, the valve 40 may then be closed. It may, if desired, be reopened from time-to-time to vent any accumulation of gas (such as nitrogen or carbon dioxide) other than oxygen in the chamber 24.
  • gas such as nitrogen or carbon dioxide
  • chambers 8 and 16 contain no internal projections of which rags or other material tend to collect.
  • the illustrated apparatus is of simple construction. During operation of the apparatus shown in Figures 1 and 2, a continuous flow of liquid therethrough is maintained.
  • the apparatus shown in Figures 1 and 2 may be employed to oxygenate sewage as part of the process described and claimed in our German patent specification (Offenlegungsschrift) 2 804 197 or as part of any other sewage treatment process in which it is desired to oxygenate the sewage. If the apparatus according to the invention is used in such a process, the outlet 34 may lead to the stilling chamber of the treatment vessel described and illustrated in the aforementioned German patent specification. Moreover, the liquid fed to the pipe 2 can comprise the incoming sewage for treatment mixed with the liquid containing bacterial solids recycled from the bottom of the treatment vessel described and illustrated in the German patent specification.
  • the outlet 34 may communicate with an inlet to a vessel containing waste water or sewage to be treated by oxygenatio ⁇ and the inlet 2 with an outlet from such vessel, and liquid continuously passed around a circuit including the vessel and the oxygenation apparatus according to the invention.

Abstract

Un appareil ameliore de dissolution d'un gaz (en particulier de l'oxygene) dans un liquide (en particulier des eaux d'egout) possede un tube d'admission (2) pour le liquide communiquant avec la partie superieure d'une chambre verticale cylindrique (8) dont la sortie (12) se projette sur une petite distance dans une chambre horizontale cylindrique (16). Le liquide subit une reduction de vitesse en passant du tube (2) vers la chambre (8) et un changement de direction et une autre reduction de vitesse en passant de la chambre (8) a la chambre (16). Des bulles de gaz sont introduites dans le liquide dans le tube (4) a partir d'un tube d'entree de gaz (6). Une partie des bulles sont transportees dans la chambre (16) avec le liquide. La turbulence creee par le changement de direction de liquide aide a degager le gaz non dissout du liquide dans la chambre (16). Ces bulles entrent dans l'espace (22) et le gaz recupere dans la chambre (24) est renvoye via le tube de recyclage (32) vers le tube (4). Le liquide oxygene est refoule par la sortie (34).
PCT/GB1980/000217 1979-12-18 1980-12-17 Procede et appareil de dissolution d'un gaz dans un liquide WO1981001700A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7943493 1979-12-18
GB7943493 1979-12-18

Publications (1)

Publication Number Publication Date
WO1981001700A1 true WO1981001700A1 (fr) 1981-06-25

Family

ID=10509912

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1980/000217 WO1981001700A1 (fr) 1979-12-18 1980-12-17 Procede et appareil de dissolution d'un gaz dans un liquide

Country Status (7)

Country Link
EP (1) EP0042396A1 (fr)
AU (1) AU541129B2 (fr)
BR (1) BR8008290A (fr)
ES (1) ES8200848A1 (fr)
GB (1) GB2077608B (fr)
WO (1) WO1981001700A1 (fr)
ZA (1) ZA807896B (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0152202A2 (fr) * 1984-01-24 1985-08-21 The BOC Group plc Dissolution d'un gaz dans un liquide
EP0152201A2 (fr) * 1984-01-24 1985-08-21 The BOC Group plc Dissolution d'un gaz dans un liquide
EP0232607A2 (fr) * 1986-02-11 1987-08-19 Norsk Hydro A/S Procédé et dispositif pour le traitement de l'eau, en particulier son enrichissement en oxygène
WO1987005284A1 (fr) * 1986-03-04 1987-09-11 Purac Ab Procede de traitement biologique d'un liquide avec un agent oxydant et appareil de realisation dudit procede
FR2607404A1 (fr) * 1986-11-28 1988-06-03 Innofinance Altalanos Innovaci Procede pour mettre en contact des gaz et des liquides
GB2257925A (en) * 1991-07-25 1993-01-27 Boc Group Inc Apparatus and method for dissolving gas in liquid
WO2005030377A1 (fr) * 2003-09-26 2005-04-07 Yara International Asa Procede et dispositif pour melanger deux fluides
US20090294375A1 (en) * 2008-05-31 2009-12-03 Neville Lange Fluid treatment apparatus
US10933388B1 (en) 2017-07-07 2021-03-02 Jmf Watercraft Design Llc H20-oxygenation method and oxygenated live well
US11110407B2 (en) 2014-11-07 2021-09-07 Oxy Solutions As Apparatus for dissolving gas into a liquid

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR8403815A (pt) * 1983-08-23 1985-07-09 Technica Entwicklung Processo e aparelho para impregnacao de um liquido com um gas e,mais especificamente,para impregnacao de agua de irrigacao com co2 para plantacoes comerciais horticolas,jardinagem de lazer ou similares,e conjunto para obtencao do processo
AU622949B2 (en) * 1988-11-21 1992-04-30 Sep - Tech Industries Australia Pty Ltd Effluent treatment
EP0606432B1 (fr) * 1992-07-09 1997-03-12 Technological Resources Pty. Ltd. Reacteur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2443568A1 (de) * 1973-09-12 1975-03-13 Volvo Flygmotor Ab Verfahren und vorrichtung zum herunterfuehren von gasblasen in fluessigkeiten
US3928199A (en) * 1971-09-20 1975-12-23 Airco Inc Gas absorption system and method
US4070292A (en) * 1975-08-25 1978-01-24 American Water Recycling Company Apparatus for treating sewage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3928199A (en) * 1971-09-20 1975-12-23 Airco Inc Gas absorption system and method
DE2443568A1 (de) * 1973-09-12 1975-03-13 Volvo Flygmotor Ab Verfahren und vorrichtung zum herunterfuehren von gasblasen in fluessigkeiten
US4070292A (en) * 1975-08-25 1978-01-24 American Water Recycling Company Apparatus for treating sewage

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0152202A2 (fr) * 1984-01-24 1985-08-21 The BOC Group plc Dissolution d'un gaz dans un liquide
EP0152201A2 (fr) * 1984-01-24 1985-08-21 The BOC Group plc Dissolution d'un gaz dans un liquide
EP0152202A3 (fr) * 1984-01-24 1987-08-05 The BOC Group plc Dissolution d'un gaz dans un liquide
EP0152201A3 (en) * 1984-01-24 1987-08-05 The Boc Group Plc Dissolving gas in liquid
EP0232607A2 (fr) * 1986-02-11 1987-08-19 Norsk Hydro A/S Procédé et dispositif pour le traitement de l'eau, en particulier son enrichissement en oxygène
EP0232607A3 (en) * 1986-02-11 1988-01-13 Norsk Hydro A/S Method and apparatus for the treatment of water, especially for the oxygen enrichment of water
WO1987005284A1 (fr) * 1986-03-04 1987-09-11 Purac Ab Procede de traitement biologique d'un liquide avec un agent oxydant et appareil de realisation dudit procede
BE1001231A3 (fr) * 1986-11-28 1989-08-29 Innofinance Altalanos Innovaci Procede pour mettre en contact des gaz et des liquides.
FR2607404A1 (fr) * 1986-11-28 1988-06-03 Innofinance Altalanos Innovaci Procede pour mettre en contact des gaz et des liquides
GB2257925A (en) * 1991-07-25 1993-01-27 Boc Group Inc Apparatus and method for dissolving gas in liquid
GB2257925B (en) * 1991-07-25 1995-04-05 Boc Group Inc Apparatus and method for dissolving gas in a liquid
WO2005030377A1 (fr) * 2003-09-26 2005-04-07 Yara International Asa Procede et dispositif pour melanger deux fluides
US7802775B2 (en) 2003-09-26 2010-09-28 Yara International Asa Method and apparatus for mixing of two fluids
US20090294375A1 (en) * 2008-05-31 2009-12-03 Neville Lange Fluid treatment apparatus
US8771520B2 (en) * 2008-05-31 2014-07-08 Vws Westgarth Limited Fluid treatment apparatus
US11110407B2 (en) 2014-11-07 2021-09-07 Oxy Solutions As Apparatus for dissolving gas into a liquid
US10933388B1 (en) 2017-07-07 2021-03-02 Jmf Watercraft Design Llc H20-oxygenation method and oxygenated live well

Also Published As

Publication number Publication date
BR8008290A (pt) 1981-07-07
ES497838A0 (es) 1981-11-16
ES8200848A1 (es) 1981-11-16
AU6551680A (en) 1981-06-25
ZA807896B (en) 1981-09-30
EP0042396A1 (fr) 1981-12-30
GB2077608B (en) 1983-04-20
GB2077608A (en) 1981-12-23
AU541129B2 (en) 1984-12-20

Similar Documents

Publication Publication Date Title
US4931225A (en) Method and apparatus for dispersing a gas into a liquid
CA1045543A (fr) Methode et materiel pour amalgamer un gaz a un liquide
US4097026A (en) Apparatus for mixing a basic liquid substance with other media
WO1981001700A1 (fr) Procede et appareil de dissolution d'un gaz dans un liquide
EA013256B1 (ru) Гравитационный сепаратор и способ разделения смеси, содержащей воду, нефть и газ
US5529190A (en) Gas sparged hydrocyclone with foam separating vessel
CA1192837A (fr) Dispositif aerateur d'eau
US4440645A (en) Dissolving gas in a liquid
US5234112A (en) Flotation reactor with external bubble generator
US4477393A (en) Apparatus for dissolution of gases in liquid
US4466928A (en) Apparatus for dissolution of gases in liquid
US4220612A (en) Flotation cell feed duct
US2616676A (en) Aerator
US4226706A (en) Dispersed air flotation machine
CA1119948A (fr) Dispositif et methode pour l'obtention de melanges de gaz et de liquides
US4737282A (en) Apparatus for separating sand and oil from a waste water stream
US6238912B1 (en) Method and apparatus for contacting gas and liquid
JP3582036B2 (ja) 気液接触装置
US4613431A (en) Froth flotation separation apparatus
PL124739B1 (en) Method of purification and/or aeration of water and apparatus therefor
US4256575A (en) Apparatus and method for treatment of liquids
US7121534B2 (en) Method and apparatus for gasifying a liquid
US5266240A (en) Flotation reactor with external bubble generator
CN213012190U (zh) 一种高浓度有机废水处理的新型ic厌氧反应器
US4613430A (en) Froth flotation separation method and apparatus

Legal Events

Date Code Title Description
AK Designated states

Designated state(s): GB US

AL Designated countries for regional patents

Designated state(s): DE FR NL SE