WO2010069670A3 - Method for removing solids from a fibre suspension by flotation and flotation device for carrying out the same - Google Patents

Method for removing solids from a fibre suspension by flotation and flotation device for carrying out the same Download PDF

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Publication number
WO2010069670A3
WO2010069670A3 PCT/EP2009/064662 EP2009064662W WO2010069670A3 WO 2010069670 A3 WO2010069670 A3 WO 2010069670A3 EP 2009064662 W EP2009064662 W EP 2009064662W WO 2010069670 A3 WO2010069670 A3 WO 2010069670A3
Authority
WO
WIPO (PCT)
Prior art keywords
flotation
suspension
carrying
removing solids
same
Prior art date
Application number
PCT/EP2009/064662
Other languages
German (de)
French (fr)
Other versions
WO2010069670A2 (en
Inventor
Axel Dreyer
Original Assignee
Voith Patent Gmbh
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 Voith Patent Gmbh filed Critical Voith Patent Gmbh
Priority to CN2009801513929A priority Critical patent/CN102257211A/en
Priority to EP09748115A priority patent/EP2379797A2/en
Publication of WO2010069670A2 publication Critical patent/WO2010069670A2/en
Publication of WO2010069670A3 publication Critical patent/WO2010069670A3/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
    • 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
    • B03D1/1443—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
    • B03D1/24—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
    • 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)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Paper (AREA)

Abstract

The invention relates to a method for removing solids from an aqueous fiber suspension (S) by means of gas bubbles (4), in particular from a waste paper suspension, wherein gas (6) is introduced into the fibre suspension (S) in at least one mixing device (1) and gas bubbles are formed. The gasified suspension (S') is taken from the mixing device (1) through an adjustable flow resistance, in particular a throttle (4), into a flotation tank (3), in which the separation of solids by flotation occurs. The method permits the air content of the gasified suspension (S') to be adjusted.
PCT/EP2009/064662 2008-12-20 2009-11-05 Method for removing solids from a fibre suspension by flotation and flotation device for carrying out the same WO2010069670A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2009801513929A CN102257211A (en) 2008-12-20 2009-11-05 Method for removing solids from a fibre suspension by flotation and flotation device for carrying out the same
EP09748115A EP2379797A2 (en) 2008-12-20 2009-11-05 Method for removing solids from a fibre suspension by flotation and flotation device for carrying out the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810064271 DE102008064271A1 (en) 2008-12-20 2008-12-20 Process for the removal of solids from a fiber suspension by flotation and flotation for its implementation
DE102008064271.1 2008-12-20

Publications (2)

Publication Number Publication Date
WO2010069670A2 WO2010069670A2 (en) 2010-06-24
WO2010069670A3 true WO2010069670A3 (en) 2010-08-12

Family

ID=42214832

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/064662 WO2010069670A2 (en) 2008-12-20 2009-11-05 Method for removing solids from a fibre suspension by flotation and flotation device for carrying out the same

Country Status (4)

Country Link
EP (1) EP2379797A2 (en)
CN (1) CN102257211A (en)
DE (1) DE102008064271A1 (en)
WO (1) WO2010069670A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012087185A1 (en) * 2010-12-21 2012-06-28 Volvo Lastvagnar Ab A tank arrangement and method for operating a vehicle tank arrangement
DE102012210264A1 (en) * 2012-06-19 2013-12-19 Voith Patent Gmbh Flotationsregelung
DE102014012666B4 (en) 2014-08-22 2016-07-21 Rithco Papertec Gmbh Apparatus and method for purifying contaminated solid-liquid mixtures and use of the apparatus and method
CN107344144B (en) * 2017-09-07 2023-09-01 北矿机电科技有限责任公司 Air suction device of self-suction air flotation machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1236432B (en) * 1963-07-03 1967-03-16 Beteiligungs & Patentverw Gmbh Flotation cell
DE19615089C1 (en) * 1996-04-17 1997-04-10 Voith Sulzer Stoffaufbereitung Paper suspension flotation useful esp. for solid impurity sepn.
DE19950600A1 (en) * 1999-10-21 2001-05-03 Kali & Salz Ag Device for gassing flotation pulp in pneumatic flotation cells comprises feed pipe of constant cross-section for liquid to be gassed and pneumatic connection with outer air
WO2006134235A1 (en) * 2005-06-17 2006-12-21 Metso Paper, Inc. Flotation cell

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3008476A1 (en) * 1980-03-05 1981-09-17 Bayer Ag, 5090 Leverkusen METHOD FOR FLOTATION AND USE OF FUNNEL NOZZLES FOR FLOTATION
DE3120202C2 (en) 1981-05-21 1986-06-26 J.M. Voith Gmbh, 7920 Heidenheim Device for deinking waste paper through flotation
DE3144386C2 (en) * 1981-11-07 1983-12-29 J.M. Voith Gmbh, 7920 Heidenheim Injector flotation apparatus
US5023021A (en) * 1990-03-07 1991-06-11 Conrad Richard H Cartridge venturi
DE19831530C1 (en) * 1998-07-14 2000-03-30 Voith Sulzer Papiertech Patent Flotation for cleaning fiber suspensions of used paper for recycling uses additional and larger gas bubbles to carry up the foreign matter with the air bubbles into a floating foam for removal
AT410405B (en) * 2001-09-17 2003-04-25 Andritz Ag Maschf METHOD AND DEVICE FOR SEPARATING INTERFERENTS FROM SUSPENSIONS BY FLOTATION
AT411155B (en) * 2002-03-27 2003-10-27 Andritz Ag Maschf DEVICE FOR SEPARATING SOLIDS FROM LIQUIDS BY FLOTATION
DE10236123B4 (en) 2002-08-07 2006-12-07 Voith Patent Gmbh Method for removing contaminants from an aqueous paper fiber suspension
CA2596329C (en) * 2005-02-01 2015-07-14 The University Of Newcastle Research Associates Limited Method and apparatus for contacting bubbles and particles in a flotation separation system
FI119998B (en) 2007-04-05 2009-05-29 Metso Paper Inc Feeding of fiber suspension flow to flotation cell and flotation cell injector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1236432B (en) * 1963-07-03 1967-03-16 Beteiligungs & Patentverw Gmbh Flotation cell
DE19615089C1 (en) * 1996-04-17 1997-04-10 Voith Sulzer Stoffaufbereitung Paper suspension flotation useful esp. for solid impurity sepn.
DE19950600A1 (en) * 1999-10-21 2001-05-03 Kali & Salz Ag Device for gassing flotation pulp in pneumatic flotation cells comprises feed pipe of constant cross-section for liquid to be gassed and pneumatic connection with outer air
WO2006134235A1 (en) * 2005-06-17 2006-12-21 Metso Paper, Inc. Flotation cell

Also Published As

Publication number Publication date
WO2010069670A2 (en) 2010-06-24
DE102008064271A1 (en) 2010-07-01
EP2379797A2 (en) 2011-10-26
CN102257211A (en) 2011-11-23

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