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IT1218334B - PLANT FOR THE ELIMINATION OF IMPURITIES FROM A LIQUID BY FLOTATION - Google Patents

PLANT FOR THE ELIMINATION OF IMPURITIES FROM A LIQUID BY FLOTATION

Info

Publication number
IT1218334B
IT1218334B IT4847683A IT4847683A IT1218334B IT 1218334 B IT1218334 B IT 1218334B IT 4847683 A IT4847683 A IT 4847683A IT 4847683 A IT4847683 A IT 4847683A IT 1218334 B IT1218334 B IT 1218334B
Authority
IT
Italy
Prior art keywords
air
impurities
admitted
foam
liquid
Prior art date
Application number
IT4847683A
Other languages
Italian (it)
Other versions
IT8348476A0 (en
Inventor
Enar Valentin Hellberg
Original Assignee
Sunds Defibrator
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
Priority claimed from BE166085A external-priority patent/BE840662A/en
Application filed by Sunds Defibrator filed Critical Sunds Defibrator
Publication of IT8348476A0 publication Critical patent/IT8348476A0/en
Application granted granted Critical
Publication of IT1218334B publication Critical patent/IT1218334B/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/32—Defibrating by other means of waste paper
    • D21B1/325—Defibrating by other means of waste paper de-inking devices
    • D21B1/327—Defibrating by other means of waste paper de-inking devices using flotation devices
    • 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
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/02—Foam dispersion or prevention
    • 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
    • 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
    • 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
    • B03D1/028—Control and monitoring of flotation processes; computer models therefor
    • 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
    • B03D1/1406—Flotation machines with special arrangement of a plurality of flotation cells, e.g. positioning a flotation cell inside another
    • 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
    • B03D1/1418—Flotation machines using centrifugal forces
    • 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
    • B03D1/1456—Feed mechanisms for the slurry
    • 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
    • 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
    • B03D1/1487—Means for cleaning or maintenance
    • 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
    • B03D1/247—Mixing gas and slurry in a device separate from the flotation tank, i.e. reactor-separator type
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
    • D21F1/70—Pulp catching, de-watering, or recovering; Re-use of pulp-water by flotation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
    • C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
    • 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
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biotechnology (AREA)
  • Chemical & Material Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)
  • Physical Water Treatments (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)

Abstract

A floatation tower for paper recovery has a set of cells one above the other, holding the fibrous paper paste, and into which water and compressed air are injected so that the impurities mix. with the bubbles to form a foam which can be removed separately. Water is admitted as a thin layer at the same time as the air to mix. with the liquid paste as it is circulated in a thin layer in a mixing chamber, passing it through and along the flow, controlling the thickness of the layer. Air is then admitted to skin off the foam and drive it into a collector vessel below, for recycling. By a similar process for each cell, ink, kaolin and fibres can be removed separately. The mixing chamber is conical, with a tangential lop entry.
IT4847683A 1976-04-12 1983-06-10 PLANT FOR THE ELIMINATION OF IMPURITIES FROM A LIQUID BY FLOTATION IT1218334B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE166085A BE840662A (en) 1976-04-12 1976-04-12 METHOD AND INSTALLATION FOR THE REMOVAL BY FLOTATION OF IMPURITIES IN THE FORM OF SOLID PARTICLES, CONTAINED IN A LIQUID

Publications (2)

Publication Number Publication Date
IT8348476A0 IT8348476A0 (en) 1983-06-10
IT1218334B true IT1218334B (en) 1990-04-12

Family

ID=3842869

Family Applications (2)

Application Number Title Priority Date Filing Date
IT4889477A IT1073184B (en) 1976-04-12 1977-04-08 PROCEDURE AND PLANT FOR THE ELIMINATION OF IMPURITIES FROM A LIQUID BY FLOTATION
IT4847683A IT1218334B (en) 1976-04-12 1983-06-10 PLANT FOR THE ELIMINATION OF IMPURITIES FROM A LIQUID BY FLOTATION

Family Applications Before (1)

Application Number Title Priority Date Filing Date
IT4889477A IT1073184B (en) 1976-04-12 1977-04-08 PROCEDURE AND PLANT FOR THE ELIMINATION OF IMPURITIES FROM A LIQUID BY FLOTATION

Country Status (13)

Country Link
JP (2) JPS52124273A (en)
AT (1) AT358499B (en)
BR (1) BR7702266A (en)
CA (1) CA1096515A (en)
CH (1) CH614636A5 (en)
DE (2) DE2760246C2 (en)
ES (1) ES458029A1 (en)
FI (1) FI68093C (en)
FR (2) FR2347984A1 (en)
GB (1) GB1570345A (en)
IT (2) IT1073184B (en)
NL (2) NL180076C (en)
SE (2) SE425145B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4157952A (en) * 1978-03-24 1979-06-12 Lenox Institute For Research Apparatus for deinking waste paper pulp
DE2836496C2 (en) * 1978-08-21 1982-05-13 E. & M. Lamort S.A., 51300 Vitry-le-François, Marne Process and device for deinking pulp suspensions
DE3111506C2 (en) * 1981-03-24 1986-01-09 Bergwerksverband Gmbh, 4300 Essen Gas injection device for flotation systems
DE3127290C2 (en) * 1981-07-10 1986-10-30 J.M. Voith Gmbh, 7920 Heidenheim Flotation device for processing waste paper
DE3320125A1 (en) * 1983-06-03 1984-12-06 J.M. Voith Gmbh, 7920 Heidenheim METHOD AND DEVICE FOR PROCESSING WASTE PAPER
AU3762285A (en) * 1984-01-30 1985-08-08 Miller, F.G. Flotation separation apparatus and method
US4613430A (en) * 1984-01-30 1986-09-23 Miller Francis G Froth flotation separation method and apparatus
DE3723502A1 (en) * 1987-07-16 1989-01-26 Henkel Kgaa METHOD FOR FLOTATION OF FILLERS FROM WASTE PAPER
DE3918025A1 (en) * 1989-06-02 1990-12-06 Bergwerksverband Gmbh FLOTATION APPARATUS
FR2772399B1 (en) 1997-12-15 2000-02-11 Lamort E & M PROCESS FOR DEINKING PAPER PULP FROM RECYCLED PAPER
JP4802305B2 (en) * 2009-07-17 2011-10-26 独立行政法人科学技術振興機構 Floating separation apparatus and method, and manufacturing method of product using the same

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR668406A (en) * 1928-01-24 1929-10-31 Phosphate Recovery Corp Improvements in the treatment of phosphatic materials
US1805830A (en) * 1929-05-20 1931-05-19 Mason Charles Dorel Foam destroyer
US1952727A (en) * 1929-10-26 1934-03-27 United Verde Copper Company Froth flotation
US2874842A (en) * 1955-04-05 1959-02-24 Krofta Milos Process and apparatus for waste liquid purification
US3148948A (en) * 1961-12-26 1964-09-15 Dorr Oliver Inc Cooling and defoaming phosphoric acid slurries
DE1792539A1 (en) * 1968-09-17 1971-11-25 Dr Baer Eberhardt H Process for the separation of emulsified or dispersed substances from water
AU464321B2 (en) * 1970-10-28 1975-08-07 Aktiengesellschaft Des Altenbergs Furberg Bau Und Zinkhuttenbetrieb Process and apparatus forthe flotation of fine-grained mixtures of material, particularly of minerals
DE2161015A1 (en) * 1971-12-09 1973-06-20 Escher Wyss Gmbh FLOATING DEVICE FOR CLEANING A FIBER SUSPENSION BY FLOTATION IN THE PAPER INDUSTRY
DE2420482A1 (en) * 1974-04-27 1975-11-13 Bergwerksverband Gmbh METHOD AND SYSTEM FOR FLOTATION

Also Published As

Publication number Publication date
NL180076C (en) 1987-01-02
FR2544225B1 (en) 1988-11-18
CH614636A5 (en) 1979-12-14
BR7702266A (en) 1977-12-06
GB1570345A (en) 1980-07-02
DE2760246C2 (en) 1985-09-12
ATA247877A (en) 1980-02-15
FR2544225A1 (en) 1984-10-19
FR2347984B1 (en) 1983-08-26
JPS6057903B2 (en) 1985-12-17
NL7703627A (en) 1977-10-14
DE2712947C2 (en) 1985-10-10
FI68093C (en) 1985-07-10
FI68093B (en) 1985-03-29
AT358499B (en) 1980-09-10
SE8202540L (en) 1982-04-22
NL8601174A (en) 1986-09-01
SE425145B (en) 1982-09-06
JPS56161849A (en) 1981-12-12
IT1073184B (en) 1985-04-13
NL180076B (en) 1986-08-01
CA1096515A (en) 1981-02-24
ES458029A1 (en) 1978-03-16
DE2712947A1 (en) 1977-10-20
JPS52124273A (en) 1977-10-19
SE452121B (en) 1987-11-16
SE7704203L (en) 1977-10-13
IT8348476A0 (en) 1983-06-10
FI770993A (en) 1977-10-13
FR2347984A1 (en) 1977-11-10
JPS5623659B2 (en) 1981-06-01

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