EP0269897A1 - Dispositif d'aération de liquides, notamment pour une flottation - Google Patents

Dispositif d'aération de liquides, notamment pour une flottation Download PDF

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Publication number
EP0269897A1
EP0269897A1 EP87116227A EP87116227A EP0269897A1 EP 0269897 A1 EP0269897 A1 EP 0269897A1 EP 87116227 A EP87116227 A EP 87116227A EP 87116227 A EP87116227 A EP 87116227A EP 0269897 A1 EP0269897 A1 EP 0269897A1
Authority
EP
European Patent Office
Prior art keywords
section
mixing
housing
air
flotation
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.)
Pending
Application number
EP87116227A
Other languages
German (de)
English (en)
Inventor
Erfindernennung liegt noch nicht vor Die
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.)
JUNGMANN, ANDREAS, DR.-ING.
REILARD, ULRICH
Allmineral Aufbereitungstechnik GmbH and Co KG
Original Assignee
Reilard Ulrich
MAN Gutehoffnungshutte GmbH
Allmineral Aufbereitungstechnik GmbH and Co KG
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 Reilard Ulrich, MAN Gutehoffnungshutte GmbH, Allmineral Aufbereitungstechnik GmbH and Co KG filed Critical Reilard Ulrich
Publication of EP0269897A1 publication Critical patent/EP0269897A1/fr
Pending legal-status Critical Current

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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
    • B03D1/247—Mixing gas and slurry in a device separate from the flotation tank, i.e. reactor-separator type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3121—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3141—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit with additional mixing means other than injector mixers
    • 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

Definitions

  • the invention relates to a device for aerating liquids, in particular for flotation, designed as a ring injector, in the housing through which the liquid flows a central piece is arranged, which forms an annular channel with the housing, the annular channel at the level of the air outlet openings in the housing wall has the smallest cross-section and an abrupt cross-sectional enlargement of the ring channel, which is followed by the mixing and dispersing section to the housing outlet, is carried out in the liquid flow direction following the ring channel constriction.
  • Devices of this type are known and are u.a. used in flotation to separate the solids contained in a slurry.
  • the poorly wettable solid particles accumulate on air bubbles that are generated in such devices, also called fumigators, injectors or reactors.
  • the solids attached to the air bubbles are generally discharged over the edge of the separation or flotation vessel.
  • the aim is to keep the size of the air bubbles as small as possible, because this facilitates the accumulation of solid particles during flotation.
  • a device for mixing gases and liquids was already described 50 years ago in US Pat. No. 1,810,131.
  • This device shows features of a ventilation device as it later (DE-OS 34 12 431), for example, has become known as a device for aerating dispersions, in particular as a flotation device for deinking fibrous material dispersions with a ring injector.
  • Air is supplied to the ring injector via air supply channels in the mixing section.
  • the annular gap that forms in the ring injector is thereby ventilated inside and outside.
  • the mixing section and the center piece, which is located centrally within the mixing and drawing section, are stepped, whereby the air is sucked into the inside and outside of the dispersion jet that forms, similar to a water jet pump.
  • the object of the invention is to improve devices of the prior art in such a way that the specific energy consumption is reduced and the degree of selectivity is increased.
  • This device is said to be particularly suitable for the flotation of coal and other processing materials.
  • the ventilation device according to the preamble of the main claim has a gap width when the sludge enters the ventilation space, which leads to a minimum turbidity speed V1 of 2.0 m / s.
  • the center piece of the device extends to the housing outlet and the diameter is constant.
  • the ring channel has the same cross-section from the sudden expansion to the housing outlet and the length of the mixing and Dispersion distance is more than 20 times the annular gap width of the ring channel.
  • distribution cones of different diameters of the base of the straight circular cone and / or cones with different angles between the base and the side line of the circular cone i.e. be used with increased or reduced slope.
  • the turbidity distribution can be influenced with the angle of the slope of the cone.
  • the strips arranged on the middle piece and / or in the upper housing part serve to center the middle piece within the mixing and Dispersion line.
  • Such strips can also be designed helically, and it has been shown that a swirl flow is superimposed on the axial flow of the cloudy-air mixture, which has an advantageous effect on the attachment of the solid particles to the air bubbles.
  • the centering of the middle piece can be done by arranging, for example, centering pins that hold the middle piece in the upper part of the housing.
  • Table 1 shows the test conditions and test results which were achieved with ring injectors of types 1 to 3 according to the invention.
  • flotation sludge from a coal wash was used as the feed.
  • the ventilation device shown in the cross-sectional view consists of a multi-part housing.
  • the lower housing part (3) has a connecting flange (1) to which the slurry pipe (not shown) is connected.
  • the arrow indicates the direction of flow of the slurry.
  • the inlet diameter of the ventilation device is designated by (Q).
  • a housing section adjoins the lower housing part (3), in which the air chamber (4) is located with the ring-shaped air outlet opening.
  • the ventilation medium flows to the air chamber (4) via an air line (not shown).
  • the gap width of the air outlet openings in the annular gap of the air chamber (4) can be changed by interposing spacer rings (13).
  • the upper housing part (7) is arranged above the lower housing part (3) with air chamber (4).
  • the flange (5) is used to fasten the ventilation device within a line to the separation vessel (not shown) or when the ventilation device is arranged outside the separation vessel as a line connection to the separation vessel.
  • the core which consists of a distribution cone (2) and the center piece (10), is located within the housing of the ventilation device.
  • the distribution cone and center piece can be screwed or plugged together.
  • the separation point is located at the transition from the reduction of the cross-section of the distribution cone to the central part of the same diameter.
  • the center piece (10) has a constant diameter over its entire length up to the housing outlet (12).
  • the mixing and dispersing section (6) follows with a length L 1 and constant gap width (Q 3) up to the housing outlet (12).
  • a screw-shaped bar (8) is indicated on the middle piece (10), which is intended to center the middle piece in the upper housing part (7) and to generate a swirl flow of the cloudy-air mixture.
  • a holding device (9) in the form of an adjustable pin is located on the upper housing part (7) below the housing outlet (12).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biotechnology (AREA)
  • Physical Water Treatments (AREA)
EP87116227A 1986-11-26 1987-11-04 Dispositif d'aération de liquides, notamment pour une flottation Pending EP0269897A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863640315 DE3640315A1 (de) 1986-11-26 1986-11-26 Vorrichtung zum belueften von fluessigkeiten, insbesondere fuer eine flotation
DE3640315 1986-11-26

Publications (1)

Publication Number Publication Date
EP0269897A1 true EP0269897A1 (fr) 1988-06-08

Family

ID=6314763

Family Applications (2)

Application Number Title Priority Date Filing Date
EP87116227A Pending EP0269897A1 (fr) 1986-11-26 1987-11-04 Dispositif d'aération de liquides, notamment pour une flottation
EP87907753A Withdrawn EP0290550A1 (fr) 1986-11-26 1987-11-04 Dispositif d'aeration de fluides, en particulier pour procedes de flottation

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP87907753A Withdrawn EP0290550A1 (fr) 1986-11-26 1987-11-04 Dispositif d'aeration de fluides, en particulier pour procedes de flottation

Country Status (6)

Country Link
US (1) US4840753A (fr)
EP (2) EP0269897A1 (fr)
AU (1) AU8277987A (fr)
DE (1) DE3640315A1 (fr)
WO (1) WO1988003838A1 (fr)
ZA (1) ZA878853B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246306A (en) * 1990-07-18 1992-01-29 Erz & Kohleflotation Gmbh A device for gassing liquids

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2035067C (fr) * 1990-02-22 1995-06-27 William M. Blough, Jr. Dispositif de melange des fluides
US5354459A (en) * 1993-03-19 1994-10-11 Jerry Smith Apparatus and method for removing odorous sulfur compounds from potable water
DE4420109A1 (de) * 1993-07-30 1995-02-02 Tamas Kadar Flüssigkeitsreinigungsvorrichtung
US5744040A (en) * 1996-05-24 1998-04-28 Sulfur-Tech Water Systems, Inc. Apparatus and method for removing dissolved hydrogen sulfide from water
US6103108A (en) 1998-09-24 2000-08-15 Kohlenberg; Larry D. Water treatment apparatus
US7537674B1 (en) 2006-06-12 2009-05-26 Narayanasamy Seenivasan Closed floatation de-inking module for recycled paper
US7544271B1 (en) 2006-06-12 2009-06-09 Narayanasamy Seenivasan Open flotation 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
JP2011152534A (ja) * 2010-01-26 2011-08-11 Cavitech Buil-Community Co Ltd 気液混合循環流発生装置
CN104548986B (zh) * 2014-12-25 2016-06-01 安徽理工大学 一种用于矿浆与药剂、空气混合的装置
WO2018191431A1 (fr) 2017-04-12 2018-10-18 Gaia Usa, Inc. Appareil et procédé pour produire et mélanger des bulles de gaz ultrafines dans une solution aqueuse à haute teneur en gaz
WO2019232273A1 (fr) 2018-06-01 2019-12-05 Gaia Usa, Inc. Appareil sous la forme d'une structure unitaire monobloc conçue pour produire et mélanger des bulles de gaz ultra-fines dans une solution aqueuse à concentration de gaz élevée

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1810131A (en) * 1929-05-25 1931-06-16 American Ozone Company Device for mixing gases and liquids
US1839952A (en) * 1928-01-07 1932-01-05 American Ozone Company Device for mixing gases and liquids
FR731829A (fr) * 1931-04-08 1932-09-08 Emulseur pour le traitement des liquides, des eaux, en particulier par un agent de stérilisation tel que l'air ozoné
AT329012B (de) * 1972-03-13 1976-04-26 Hutter Karl Vorrichtung zum mischen von stromungsfahigen medien
FR2539772A1 (fr) * 1983-01-25 1984-07-27 Marvejouls Anne Appareil centrifuge pour l'epuration de suspensions liquides contenant des impuretes solides
DE3412431A1 (de) * 1984-04-03 1985-10-03 E. & M. Lamort S.A., Vitry-le-François, Marne Vorrichtung zum belueften
DE3419153A1 (de) * 1984-05-23 1985-11-28 Hosch-Fördertechnik GmbH, 4350 Recklinghausen Vorrichtung zum einbringen von gas in eine fluessigkeit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2938629A (en) * 1955-07-28 1960-05-31 Smith Douglass Company Inc Concentration of comminuted materials
US4014961A (en) * 1973-04-24 1977-03-29 Vitaly Fedorovich Popov Ejector mixer for gases and/or liquids
SE442173B (sv) * 1983-10-27 1985-12-09 Sunds Defibrator Anordning vid flotation av fibersuspensioner
EP0211834B1 (fr) * 1984-04-03 1988-12-28 Feldmühle Aktiengesellschaft Installation d'aeration
US4533123A (en) * 1984-05-07 1985-08-06 Betz Laboratories, Inc. Liquid mixing device
CA1259304A (fr) * 1985-09-06 1989-09-12 Hans C. Rasmusen Melangeur inerte pour gaz et liquides

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1839952A (en) * 1928-01-07 1932-01-05 American Ozone Company Device for mixing gases and liquids
US1810131A (en) * 1929-05-25 1931-06-16 American Ozone Company Device for mixing gases and liquids
FR731829A (fr) * 1931-04-08 1932-09-08 Emulseur pour le traitement des liquides, des eaux, en particulier par un agent de stérilisation tel que l'air ozoné
AT329012B (de) * 1972-03-13 1976-04-26 Hutter Karl Vorrichtung zum mischen von stromungsfahigen medien
FR2539772A1 (fr) * 1983-01-25 1984-07-27 Marvejouls Anne Appareil centrifuge pour l'epuration de suspensions liquides contenant des impuretes solides
DE3412431A1 (de) * 1984-04-03 1985-10-03 E. & M. Lamort S.A., Vitry-le-François, Marne Vorrichtung zum belueften
DE3419153A1 (de) * 1984-05-23 1985-11-28 Hosch-Fördertechnik GmbH, 4350 Recklinghausen Vorrichtung zum einbringen von gas in eine fluessigkeit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246306A (en) * 1990-07-18 1992-01-29 Erz & Kohleflotation Gmbh A device for gassing liquids
GB2246306B (en) * 1990-07-18 1993-11-17 Erz & Kohleflotation Gmbh A device for gassing liquids

Also Published As

Publication number Publication date
DE3640315A1 (de) 1988-06-09
EP0290550A1 (fr) 1988-11-17
US4840753A (en) 1989-06-20
DE3640315C2 (fr) 1989-05-11
ZA878853B (en) 1989-01-25
AU8277987A (en) 1988-06-16
WO1988003838A1 (fr) 1988-06-02

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Free format text: VERFAHREN ABGESCHLOSSEN INFOLGE VERBINDUNG MIT 87907753.5/0290550 (EUROPAEISCHE ANMELDENUMMER/VEROEFFENTLICHUNGSNUMMER) VOM 27.11.90.