FR2249703A1 - Floating gas-liq. exchange appts. - for oxygenation of large vols. of water such as lakes - Google Patents

Floating gas-liq. exchange appts. - for oxygenation of large vols. of water such as lakes

Info

Publication number
FR2249703A1
FR2249703A1 FR7338813A FR7338813A FR2249703A1 FR 2249703 A1 FR2249703 A1 FR 2249703A1 FR 7338813 A FR7338813 A FR 7338813A FR 7338813 A FR7338813 A FR 7338813A FR 2249703 A1 FR2249703 A1 FR 2249703A1
Authority
FR
France
Prior art keywords
water
tube
annular
appts
bubbles
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
FR7338813A
Other languages
French (fr)
Other versions
FR2249703B1 (en
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.)
Cegelec SA
Original Assignee
Cegelec SA
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 Cegelec SA filed Critical Cegelec SA
Priority to FR7338813A priority Critical patent/FR2249703A1/en
Publication of FR2249703A1 publication Critical patent/FR2249703A1/en
Application granted granted Critical
Publication of FR2249703B1 publication Critical patent/FR2249703B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B01F23/2323—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 by circulating the flow in guiding constructions or conduits
    • B01F23/23231—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 by circulating the flow in guiding constructions or conduits being at least partially immersed in the liquid, e.g. in a closed circuit
    • 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
    • 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
    • C02F3/20—Activated sludge processes using diffusers
    • C02F3/205—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors
    • C02F3/207—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors with axial thrust propellers
    • 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

Abstract

Gas-liq. exchanges, partic. water-oxygen exchanges where it is necessary to treat large quantities of water in lakes, rivers or purificn. stations for large towns, are effected in systems which require only a small amt. of energy and which occupy little space. The appts. for oxygenating the water in a lake draws the water in through an annular orifice and the water rises in the concentric tubes under the action of a motor driven pump. The water descends in the central tube, drawing in air bubbles, by the reduced pressure, through a tube, fitted with a valve; the water reaches the base of the central tube and rises again in an annular tube. It is rejected into the lake after effecting oxygenation by its bubbles. The latter continue to rise up the annular tube and pass an adjustable nozzle where they commence to treat the incoming water. The partly deprived bubbles pass into a separator and leave for the atmos. by a tube. The water meets fresh air entering at the top of the central tube and mixes with it while descending the tube. The oxygen-water exchange is made under the most favourable conditions towards the base of the tubes where the press. is highest; the efficiency attained enables the quantity of gas introduced to be reduced to the minimum. The appts. is maintained in the floating position by an immersed, annular float.
FR7338813A 1973-10-31 1973-10-31 Floating gas-liq. exchange appts. - for oxygenation of large vols. of water such as lakes Granted FR2249703A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7338813A FR2249703A1 (en) 1973-10-31 1973-10-31 Floating gas-liq. exchange appts. - for oxygenation of large vols. of water such as lakes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7338813A FR2249703A1 (en) 1973-10-31 1973-10-31 Floating gas-liq. exchange appts. - for oxygenation of large vols. of water such as lakes

Publications (2)

Publication Number Publication Date
FR2249703A1 true FR2249703A1 (en) 1975-05-30
FR2249703B1 FR2249703B1 (en) 1976-10-01

Family

ID=9127174

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7338813A Granted FR2249703A1 (en) 1973-10-31 1973-10-31 Floating gas-liq. exchange appts. - for oxygenation of large vols. of water such as lakes

Country Status (1)

Country Link
FR (1) FR2249703A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003787A1 (en) * 1978-02-16 1979-09-05 LOCHER & CIE. AG. Waste water aeration basin
EP0027912A1 (en) * 1979-10-02 1981-05-06 Union Carbide Corporation Apparatus for contacting liquid with a gas
US4749493A (en) * 1986-10-07 1988-06-07 Hicks Charles E Method and apparatus for oxygenating water
FR2782022A1 (en) * 1998-08-07 2000-02-11 Aquinove Apparatus for dissolving a gas in a liquid comprises pump for extracting fraction of liquid and re-injecting it in form of jet under pressure to form bubbles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003787A1 (en) * 1978-02-16 1979-09-05 LOCHER & CIE. AG. Waste water aeration basin
EP0027912A1 (en) * 1979-10-02 1981-05-06 Union Carbide Corporation Apparatus for contacting liquid with a gas
US4749493A (en) * 1986-10-07 1988-06-07 Hicks Charles E Method and apparatus for oxygenating water
FR2782022A1 (en) * 1998-08-07 2000-02-11 Aquinove Apparatus for dissolving a gas in a liquid comprises pump for extracting fraction of liquid and re-injecting it in form of jet under pressure to form bubbles

Also Published As

Publication number Publication date
FR2249703B1 (en) 1976-10-01

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Legal Events

Date Code Title Description
ST Notification of lapse