FR2229649A1 - Flotation plant for removal of impurities in water - has the tank under vacuum to accelerate bubble formation - Google Patents

Flotation plant for removal of impurities in water - has the tank under vacuum to accelerate bubble formation

Info

Publication number
FR2229649A1
FR2229649A1 FR7416881A FR7416881A FR2229649A1 FR 2229649 A1 FR2229649 A1 FR 2229649A1 FR 7416881 A FR7416881 A FR 7416881A FR 7416881 A FR7416881 A FR 7416881A FR 2229649 A1 FR2229649 A1 FR 2229649A1
Authority
FR
France
Prior art keywords
impurities
removal
water
under vacuum
bubble formation
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
FR7416881A
Other languages
French (fr)
Other versions
FR2229649B1 (en
Inventor
S E A Svanteson
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.)
Electrolux AB
Original Assignee
Electrolux AB
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 Electrolux AB filed Critical Electrolux AB
Publication of FR2229649A1 publication Critical patent/FR2229649A1/en
Application granted granted Critical
Publication of FR2229649B1 publication Critical patent/FR2229649B1/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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/02—Froth-flotation processes
    • B03D1/04—Froth-flotation processes by varying ambient atmospheric pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/1431—Dissolved air flotation machines

Abstract

The lower part of the relatively tall sealed flotation tank of a waste water purificn. plant is connected to a filling tank contg. liq. into which air is injected and dissolved at atmospheric pressure. In the upper zone of the flotation tank, pressure is so reduced by a vacuum pump that the surface of the liq. in the flotation tank is considerably higher than that of the filling tank, the reduced pressure accelerating the formation of air bubbles which attach to the impurities so that the sludge can be floated over a dam at one side and clear water drained off at the other.
FR7416881A 1973-05-17 1974-05-15 Flotation plant for removal of impurities in water - has the tank under vacuum to accelerate bubble formation Granted FR2229649A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7307012A SE374676B (en) 1973-05-17 1973-05-17

Publications (2)

Publication Number Publication Date
FR2229649A1 true FR2229649A1 (en) 1974-12-13
FR2229649B1 FR2229649B1 (en) 1976-06-25

Family

ID=20317507

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7416881A Granted FR2229649A1 (en) 1973-05-17 1974-05-15 Flotation plant for removal of impurities in water - has the tank under vacuum to accelerate bubble formation

Country Status (5)

Country Link
JP (1) JPS522816B2 (en)
DE (1) DE2357461A1 (en)
FI (1) FI141674A (en)
FR (1) FR2229649A1 (en)
SE (1) SE374676B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2397881A1 (en) * 1977-07-20 1979-02-16 Alsthom Atlantique Creation of micro-bubbles from the flotation sepn. of a suspension - with gas saturation chamber, cavitation zone and flotation chamber in which supersaturation occurs

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1540723A (en) * 1975-05-07 1979-02-14 Carrier Drysys Ltd Treating waste paint solids
DE4116919A1 (en) * 1991-05-24 1992-11-26 Henninger Geier Waltraud Water cleaning - has catch basin for overflow of water and air mixt. for sepn. by gravity into pptd. and floating portions
JPH0740745A (en) * 1993-07-28 1995-02-10 Kinugawa Rubber Ind Co Ltd Waist seal structure of automotive door
EP3539173A4 (en) * 2016-11-11 2020-10-28 Celgard LLC Improved microlayer membranes, improved battery separators, and related methods

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE946220C (en) * 1964-08-17 1956-07-26 Dorr Co Treatment plant for waste water

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE946220C (en) * 1964-08-17 1956-07-26 Dorr Co Treatment plant for waste water

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2397881A1 (en) * 1977-07-20 1979-02-16 Alsthom Atlantique Creation of micro-bubbles from the flotation sepn. of a suspension - with gas saturation chamber, cavitation zone and flotation chamber in which supersaturation occurs

Also Published As

Publication number Publication date
DE2357461A1 (en) 1974-12-05
FR2229649B1 (en) 1976-06-25
JPS522816B2 (en) 1977-01-24
JPS5053951A (en) 1975-05-13
SE374676B (en) 1975-03-17
FI141674A (en) 1974-11-18

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Legal Events

Date Code Title Description
ST Notification of lapse