EP0243690A3 - Flotation tank or cell - Google Patents

Flotation tank or cell Download PDF

Info

Publication number
EP0243690A3
EP0243690A3 EP87104540A EP87104540A EP0243690A3 EP 0243690 A3 EP0243690 A3 EP 0243690A3 EP 87104540 A EP87104540 A EP 87104540A EP 87104540 A EP87104540 A EP 87104540A EP 0243690 A3 EP0243690 A3 EP 0243690A3
Authority
EP
European Patent Office
Prior art keywords
flotation cell
suspension
opening
enters
mixing pipe
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
EP87104540A
Other languages
German (de)
Other versions
EP0243690B1 (en
EP0243690A2 (en
Inventor
Peter Schweiss
Hans-Dieter Dorflinger
Hans-Otto Henrich
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.)
JM Voith GmbH
Original Assignee
JM Voith 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 JM Voith GmbH filed Critical JM Voith GmbH
Priority to AT87104540T priority Critical patent/ATE69398T1/en
Publication of EP0243690A2 publication Critical patent/EP0243690A2/en
Publication of EP0243690A3 publication Critical patent/EP0243690A3/en
Application granted granted Critical
Publication of EP0243690B1 publication Critical patent/EP0243690B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B03D1/1475—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
    • B03D1/24—Pneumatic
    • B03D1/247—Mixing gas and slurry in a device separate from the flotation tank, i.e. reactor-separator type
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/75—Flowing liquid aspirates gas

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biotechnology (AREA)
  • Paper (AREA)
  • Physical Water Treatments (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)

Abstract

A flotation cell featuring a mixing pipe which enters the suspension essentially vertically, follows the point of air intake, and generally receives the entire suspension quantity per flotation cell, the injector of the flotation cell is offset sideways relative to the vertical center axis of the round container cross-section and away from the side on which the foam removal opening and the liquid drain opening are located. The mixing pipe (1) enters the suspension only for a distance such that its discharge opening, mouth (2), is located at least at one-half the height of the level of the overflow edge (7) of the foam removal channel (8), figured from the container bottom. The liquid drain opening (9) is preferably provided in the immediate vicinity of the container bottom, with a cover plate (11) extending across the length of the flotation cell and forming a drain channel (12) into which proceeds the clean liquid through an upper (14) and a lower (13) slot.
EP87104540A 1986-05-02 1987-03-27 Flotation tank or cell Expired - Lifetime EP0243690B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87104540T ATE69398T1 (en) 1986-05-02 1987-03-27 FLOTATION VESSEL OR CELL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3614933 1986-05-02
DE3614933A DE3614933C1 (en) 1986-05-02 1986-05-02 Flotation tank or cell

Publications (3)

Publication Number Publication Date
EP0243690A2 EP0243690A2 (en) 1987-11-04
EP0243690A3 true EP0243690A3 (en) 1989-06-14
EP0243690B1 EP0243690B1 (en) 1991-11-13

Family

ID=6300056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104540A Expired - Lifetime EP0243690B1 (en) 1986-05-02 1987-03-27 Flotation tank or cell

Country Status (6)

Country Link
US (1) US4726897A (en)
EP (1) EP0243690B1 (en)
JP (1) JP2593309B2 (en)
AT (1) ATE69398T1 (en)
DE (1) DE3614933C1 (en)
ES (1) ES2027648T3 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3789795T2 (en) * 1986-09-25 1994-11-24 Univ Newcastle Res Ass Column flotation method and device.
DE8701636U1 (de) * 1987-02-04 1987-03-19 J.M. Voith Gmbh, 7920 Heidenheim Injektor
DE4116916C2 (en) * 1991-05-24 1994-09-22 Escher Wyss Gmbh Flotation device for removing impurities, in particular printing ink, from waste paper suspensions
DE4309918C2 (en) * 1993-03-26 1994-09-15 Voith Gmbh J M Flotation cell with an injector
DE4314507C1 (en) * 1993-05-03 1994-06-23 Voith Gmbh J M Flotation facility injector
US5529190A (en) * 1995-02-06 1996-06-25 Ahlstrom Machinery, Inc. Gas sparged hydrocyclone with foam separating vessel
AT401734B (en) * 1995-04-27 1996-11-25 Trimmel Engelbert Dipl Ing Dr Process and apparatus for bringing a liquid into contact with a gas, especially for cleaning
DE19615089C1 (en) * 1996-04-17 1997-04-10 Voith Sulzer Stoffaufbereitung Paper suspension flotation useful esp. for solid impurity sepn.
US6955989B2 (en) * 2001-11-30 2005-10-18 Xerox Corporation Use of a U-groove as an alternative to using a V-groove for protection against dicing induced damage in silicon
AT411155B (en) * 2002-03-27 2003-10-27 Andritz Ag Maschf DEVICE FOR SEPARATING SOLIDS FROM LIQUIDS BY FLOTATION
AT412216B (en) 2003-01-24 2004-11-25 Andritz Ag Maschf METHOD AND DEVICE FOR VENTILATING SUSPENSIONS
US7544271B1 (en) 2006-06-12 2009-06-09 Narayanasamy Seenivasan Open flotation de-inking module for recycled paper
US7537674B1 (en) 2006-06-12 2009-05-26 Narayanasamy Seenivasan Closed floatation de-inking module for recycled paper
US7562777B1 (en) 2006-06-12 2009-07-21 Narayanasamy Seenivasan Flotation cell injector assembly for use with open or closed flotation deinking modules for recycled paper
JP4538479B2 (en) * 2007-09-04 2010-09-08 日本製紙株式会社 Floatator
DE102008056506A1 (en) * 2008-11-08 2010-05-12 Voith Patent Gmbh mixing device
FI122400B (en) 2010-05-28 2011-12-30 Metso Paper Inc Flotation cell and method for deinking a fiber suspension

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2313127A1 (en) * 1975-06-02 1976-12-31 Envirotech Corp GAS DISPERSION FLOTATION METHOD AND MACHINE
US4255262A (en) * 1979-03-26 1981-03-10 U.S. Filter Corporation Hydraulic powered mixing apparatus
DE3120202A1 (en) * 1981-05-21 1982-12-09 J.M. Voith Gmbh, 7920 Heidenheim Device for the deinking of waste paper by flotation
GB2108858A (en) * 1981-11-07 1983-05-25 Voith Gmbh J M Injection apparatus

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4110210A (en) * 1975-06-02 1978-08-29 Envirotech Corporation Dispersed gas flotation process
DE2634494C2 (en) * 1976-07-31 1983-04-14 Bayer Ag, 5090 Leverkusen New injectors for liquid gassing
DE3008476A1 (en) * 1980-03-05 1981-09-17 Bayer Ag, 5090 Leverkusen METHOD FOR FLOTATION AND USE OF FUNNEL NOZZLES FOR FLOTATION
EP0037513B1 (en) * 1980-04-09 1984-08-08 Feldmühle Aktiengesellschaft Flotation apparatus for deinking fibrous suspensions
CS216048B1 (en) * 1980-06-16 1982-10-29 Svatopluk Mackrle Appliance for the flotation separation of the suspension or emulsion from the liquids
JPS592435U (en) * 1982-06-25 1984-01-09 三菱重工業株式会社 floating sorter
US4564457A (en) * 1983-11-03 1986-01-14 L'eau Claire Systems, Inc. Upflow gas eductor induced air floatation separator
US4606822A (en) * 1984-11-01 1986-08-19 Miller Francis G Vortex chamber aerator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2313127A1 (en) * 1975-06-02 1976-12-31 Envirotech Corp GAS DISPERSION FLOTATION METHOD AND MACHINE
US4255262A (en) * 1979-03-26 1981-03-10 U.S. Filter Corporation Hydraulic powered mixing apparatus
DE3120202A1 (en) * 1981-05-21 1982-12-09 J.M. Voith Gmbh, 7920 Heidenheim Device for the deinking of waste paper by flotation
GB2108858A (en) * 1981-11-07 1983-05-25 Voith Gmbh J M Injection apparatus

Also Published As

Publication number Publication date
DE3614933C1 (en) 1987-10-22
EP0243690B1 (en) 1991-11-13
JP2593309B2 (en) 1997-03-26
ES2027648T3 (en) 1992-06-16
EP0243690A2 (en) 1987-11-04
JPS62262758A (en) 1987-11-14
US4726897A (en) 1988-02-23
ATE69398T1 (en) 1991-11-15

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