FR2397881A1 - Creation of micro-bubbles from the flotation sepn. of a suspension - with gas saturation chamber, cavitation zone and flotation chamber in which supersaturation occurs - Google Patents

Creation of micro-bubbles from the flotation sepn. of a suspension - with gas saturation chamber, cavitation zone and flotation chamber in which supersaturation occurs

Info

Publication number
FR2397881A1
FR2397881A1 FR7722234A FR7722234A FR2397881A1 FR 2397881 A1 FR2397881 A1 FR 2397881A1 FR 7722234 A FR7722234 A FR 7722234A FR 7722234 A FR7722234 A FR 7722234A FR 2397881 A1 FR2397881 A1 FR 2397881A1
Authority
FR
France
Prior art keywords
flotation
bubbles
micro
chamber
suspension
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.)
Withdrawn
Application number
FR7722234A
Other languages
French (fr)
Inventor
Yves Lecoffre
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.)
Alstom SA
Original Assignee
Alsthom Atlantique 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 Alsthom Atlantique SA filed Critical Alsthom Atlantique SA
Priority to FR7722234A priority Critical patent/FR2397881A1/en
Priority to NL7807738A priority patent/NL7807738A/en
Publication of FR2397881A1 publication Critical patent/FR2397881A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B03D1/24—Pneumatic
    • 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
    • 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
    • B03D1/1443—Feed or discharge mechanisms for flotation tanks
    • B03D1/1475—Flotation tanks having means for discharging the pulp, e.g. as a bleed stream
    • 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
    • B03D1/1443—Feed or discharge mechanisms for flotation tanks
    • B03D1/1462—Discharge mechanisms for the froth

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biotechnology (AREA)
  • Physical Water Treatments (AREA)

Abstract

Particles or droplets of an immiscible fluid suspended in a liq. are removed by a flotation process in which microbubbles formed in the liq. adhere to the suspended particles and float them to the surface of a flotation chamber. The micro-bubbles are created by saturating the suspension with a gas and then passing it through a channel contg. a flap valve leading to the flotation chambers. The flap valve is periodically and suddenly closed and opened causing low pressure waves to be created and consequent cavitation in the flowing fluid. The micro-bubbles are formed when the cavities implode further down the channel. The flow is so arranged, that the micro-bubbles are formed in a zone in which the fluid is super-saturated with gas so that, as the bubbles collect particles, they also grow.
FR7722234A 1977-07-20 1977-07-20 Creation of micro-bubbles from the flotation sepn. of a suspension - with gas saturation chamber, cavitation zone and flotation chamber in which supersaturation occurs Withdrawn FR2397881A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7722234A FR2397881A1 (en) 1977-07-20 1977-07-20 Creation of micro-bubbles from the flotation sepn. of a suspension - with gas saturation chamber, cavitation zone and flotation chamber in which supersaturation occurs
NL7807738A NL7807738A (en) 1977-07-20 1978-07-19 Creation of micro-bubbles from the flotation sepn. of a suspension - with gas saturation chamber, cavitation zone and flotation chamber in which supersaturation occurs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7722234A FR2397881A1 (en) 1977-07-20 1977-07-20 Creation of micro-bubbles from the flotation sepn. of a suspension - with gas saturation chamber, cavitation zone and flotation chamber in which supersaturation occurs

Publications (1)

Publication Number Publication Date
FR2397881A1 true FR2397881A1 (en) 1979-02-16

Family

ID=9193560

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7722234A Withdrawn FR2397881A1 (en) 1977-07-20 1977-07-20 Creation of micro-bubbles from the flotation sepn. of a suspension - with gas saturation chamber, cavitation zone and flotation chamber in which supersaturation occurs

Country Status (1)

Country Link
FR (1) FR2397881A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2536305A1 (en) * 1982-11-23 1984-05-25 Voith Gmbh PROCESS AND INSTALLATION FOR FLOATING SUSPENSION OF FIBERS

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1515942A (en) * 1920-04-23 1924-11-18 Eldred Process and apparatus for separating carbonaceous material
GB275778A (en) * 1926-07-16 1927-08-18 Frank Edward Elmore Improvements in or relating to the separation of materials by flotation
FR1282416A (en) * 1961-02-24 1962-01-19 Leje & Thurne Ab Method and apparatus for separating particles suspended in a liquid
FR2109518A5 (en) * 1970-08-11 1972-05-26 Gotte August Vacuum flotation appts
FR2229649A1 (en) * 1973-05-17 1974-12-13 Electrolux Ab Flotation plant for removal of impurities in water - has the tank under vacuum to accelerate bubble formation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1515942A (en) * 1920-04-23 1924-11-18 Eldred Process and apparatus for separating carbonaceous material
GB275778A (en) * 1926-07-16 1927-08-18 Frank Edward Elmore Improvements in or relating to the separation of materials by flotation
FR1282416A (en) * 1961-02-24 1962-01-19 Leje & Thurne Ab Method and apparatus for separating particles suspended in a liquid
FR2109518A5 (en) * 1970-08-11 1972-05-26 Gotte August Vacuum flotation appts
FR2229649A1 (en) * 1973-05-17 1974-12-13 Electrolux Ab Flotation plant for removal of impurities in water - has the tank under vacuum to accelerate bubble formation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2536305A1 (en) * 1982-11-23 1984-05-25 Voith Gmbh PROCESS AND INSTALLATION FOR FLOATING SUSPENSION OF FIBERS

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Legal Events

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ST Notification of lapse