WO1995029012A1 - Dispositif pour introduire du gaz dans une suspension - Google Patents

Dispositif pour introduire du gaz dans une suspension Download PDF

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Publication number
WO1995029012A1
WO1995029012A1 PCT/EP1995/001489 EP9501489W WO9529012A1 WO 1995029012 A1 WO1995029012 A1 WO 1995029012A1 EP 9501489 W EP9501489 W EP 9501489W WO 9529012 A1 WO9529012 A1 WO 9529012A1
Authority
WO
WIPO (PCT)
Prior art keywords
gassing
suspension
partial streams
central axis
gassing device
Prior art date
Application number
PCT/EP1995/001489
Other languages
German (de)
English (en)
Inventor
Rainer Imhof
Original Assignee
Klöckner-Humboldt-Deutz Ag
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 Klöckner-Humboldt-Deutz Ag filed Critical Klöckner-Humboldt-Deutz Ag
Priority to EP95917943A priority Critical patent/EP0757591B1/fr
Priority to BR9507501A priority patent/BR9507501A/pt
Priority to DE59506733T priority patent/DE59506733D1/de
Publication of WO1995029012A1 publication Critical patent/WO1995029012A1/fr

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
    • 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
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit

Definitions

  • the invention relates to a device for gassing a liquid-solid suspension to be flourished for the purpose of carrying out a pneumatic flotation.
  • gas bubbles are generated by a gassing device, which, under certain conditions, specifically attach to certain solids.
  • gas-bubble-solid complexes are formed in the suspension, which are then separated off as foam in a separation vessel after leaving the gassing device.
  • a special design of the gassing device can influence the number and the size of the gas bubbles generated and thus the accumulation of the gas bubbles on the solids to be discharged.
  • the gas bubbles can be generated in different ways.
  • DE 24 20 482 describes a gassing device for flotation plants, comprising a gassing chamber in which the suspension is passed through a sieve and then brought into contact with air, wherein sieves with different hole diameters (5 to 40 ⁇ m) can be used.
  • the gas supply line is closed with a metal frit through which the air exits in the form of gas bubbles.
  • the maximum pore size of the metal frit is specified as 10 to 150 ⁇ m.
  • ORIGINAL DOCUMENTS flows perpendicular to the lamella surface, the gas passing into the liquid between adjacent lamellae.
  • the gaps between the lamellae are 10 to 500 ⁇ m, preferably 25 ⁇ m.
  • the suspension stream entering a device is separated into several partial suspension streams. While after the Known methods of DE 31 40 966 separate the generated partial streams from each other in the separating vessel, impacting the suspension surface, thereby introducing air in the form of bubbles into the suspension, the separation of the separated partial streams according to the invention is already found in the loading - Gasungsvo ⁇ chtung instead, in such a way that all partial beams collide at a common point within the fumigation device.
  • the suspension container in which the foam formed by the gassing is separated, and the gassing device are therefore spatially separated from one another, so that a separate optimization of the gassing process is possible without simultaneously adversely affecting the separation process in the separation vessel influence.
  • the inventive collision of the previously separated partial jets at one point not only advantageously introduces the gas into the suspension, but at the same time a particularly optimal attachment of the gas bubbles to the solid particles to be discharged is achieved.
  • the size of the gas bubbles, their distribution and their attachment to the solids to be discharged can be changed by changing the location of the "impact point", which is freely selectable by changing the angle that the partial beams form to the central axis of the gassing device Change the design of the lower part of the gassing device, a flow pipe in which this impact point is located, in a simple manner and thus optimize it, without adversely affecting the separation process, which takes place in a separation vessel that is locally separated from the gassing device.
  • the change in the angle of the partial jets and the change in the shape of the lower flow tube can be carried out according to the invention in a simple manner by exchanging the nozzle plate which generates the partial jets and the lower flow tube by a flow tube of a different shape.
  • the gassing device (10) consists of several sections (18, 14, 19, 20) which are detachably connected to one another in a modular manner.
  • the upper part (18) is tubular and is closed at the bottom with a nozzle plate (14).
  • Nozzles (15) are arranged in the nozzle plate (14), the axes of which are aligned so that they converge so that they meet at a point (P).
  • the nozzles (15) can be arranged in a circle around the central axis (13) of the gassing device (10), so that the nozzle axes each form the same acute angle ( ⁇ ) with the central axis (13). However, they can also be arranged in several circles around the central axis (13), so that the nozzle axes arranged here form a different fixed acute angle with the central axis (13) for each circle.
  • a housing (19) which surrounds the fumigation space (16) and has lateral openings (17) which lead from the outside into the fumigation space (16) is arranged below the nozzle plate (14).
  • Pipe section (18), nozzle plate (14) and housing (19) are detachably connected to one another, the connection being made, for example by a screw connection (23), so that the nozzle plate can be replaced in a simple manner.
  • a flow tube (20) is inserted into the housing (19) from below, whereby the fumigation space (16) is extended downwards and in which point (P) is then located.
  • the housing (19) and flow tube (20) are also detachably connected to one another in order to make it easy to replace the flow tube (20).
  • the flow tube (20) can have a thread on the outside at its upper end, so that the flow tube (20) can be screwed into a corresponding thread on the inside in the housing (19).
  • the suspension to be gassed is conveyed by a pump device (not shown in the drawing) with high pressure as a suspension stream (11) into the tubular upper part (18) of the gassing device (10) and through the nozzles (15 ) the nozzle part (14) closing the upper part (18).
  • the suspension stream (11) is thereby separated into partial streams (12), the flow direction of which corresponds to the direction of the nozzle axes and, like these, are arranged so as to converge with one another.
  • the gassing can be influenced in the desired manner.
  • a further favorable influence on the gassing process can be found by regulating the pressure and the amount of the suspension flowing into the gassing device and by limiting or increasing (by means of an additional pump) the amount of gas flowing into the gassing space (16) ⁇ practice.
  • the arrangement of flow bodies in the free space inside the gassing device above and / or below the nozzle plate (14) can also advantageously have a favorable influence on the gassing process.
  • the entire gassing Solution device (10) is assembled in a modular manner, as a result of which parts damaged by wear can be replaced in a simple and quick manner.
  • these can also be made of a wear-resistant material, for example a hard metal or a ceramic material (e.g. Silicon carbide). This applies in particular to the baffle plate (14), which is particularly exposed to wear and whose manufacture from a special wear-resistant material should not cause any great difficulties.
  • a wear-resistant material for example a hard metal or a ceramic material (e.g. Silicon carbide).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biotechnology (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Silicon Compounds (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Fluid-Damping Devices (AREA)
  • Paper (AREA)
  • Catching Or Destruction (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)

Abstract

L'invention concerne un dispositif pour introduire du gaz dans des supensions en vue d'effectuer une flottation pneumatique. Un courant de suspension (11) entrant dans le dispositif (10) est divisé en courants partiels (12) qui convergent de telle manière qu'ils se rencontrent en un point (P) à l'intérieur du dispositif (10) et s'unissent pour former un courant de suspension gazéifié (21).
PCT/EP1995/001489 1994-04-23 1995-04-20 Dispositif pour introduire du gaz dans une suspension WO1995029012A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP95917943A EP0757591B1 (fr) 1994-04-23 1995-04-20 Dispositif pour introduire du gaz dans une suspension
BR9507501A BR9507501A (pt) 1994-04-23 1995-04-20 Equipamento para gaseificação de uma suspensão
DE59506733T DE59506733D1 (de) 1994-04-23 1995-04-20 Vorrichtung zur begasung einer suspension

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4414272.2 1994-04-23
DE4414272A DE4414272A1 (de) 1994-04-23 1994-04-23 Vorrichtung zur Begasung einer Suspension

Publications (1)

Publication Number Publication Date
WO1995029012A1 true WO1995029012A1 (fr) 1995-11-02

Family

ID=6516296

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/001489 WO1995029012A1 (fr) 1994-04-23 1995-04-20 Dispositif pour introduire du gaz dans une suspension

Country Status (6)

Country Link
EP (1) EP0757591B1 (fr)
AT (1) ATE183950T1 (fr)
BR (1) BR9507501A (fr)
DE (2) DE4414272A1 (fr)
WO (1) WO1995029012A1 (fr)
ZA (1) ZA953265B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU183320U1 (ru) * 2018-07-16 2018-09-18 Борис Семенович Ксенофонтов Эжектор-смеситель
RU199052U1 (ru) * 2020-02-11 2020-08-11 Борис Семенович Ксенофонтов Эжектор - смеситель
RU218231U1 (ru) * 2023-01-23 2023-05-17 Борис Семенович Ксенофонтов Эжектор-смеситель

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10131279C2 (de) * 2001-01-30 2003-04-17 Juergen Kampe Vorrichtung zum Eintrag von Gas in flüssige Medien
DE102009011046A1 (de) * 2009-02-28 2010-09-02 Voith Patent Gmbh Flotationsvorrichtung
DE102009040318A1 (de) * 2009-09-05 2011-03-10 Voith Patent Gmbh Verfahren zur Entfernung von Störstoffen aus einer Fasersuspension durch Flotation sowie Flotationsvorrichtung zu seiner Durchführung
GB2495749B (en) 2011-10-20 2015-11-04 Rocktron Mineral Services Ltd Beneficiation of fly ash

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3140966A1 (de) * 1981-10-15 1983-05-05 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren und flotationszelle zur flotation von kohle und erz
US4580948A (en) * 1984-07-19 1986-04-08 Helios Research Corp. Hydrokinetic amplifier with high momentum transfer coefficient
US4830790A (en) * 1987-11-04 1989-05-16 Co-Son Industries Foam generating nozzle

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1230373B (de) * 1965-11-20 1966-12-15 Beteiligungs & Patentverw Gmbh Flotationszelle
US3659962A (en) * 1970-06-02 1972-05-02 Zink Co John Aspirator
DE2320609C3 (de) * 1973-04-24 1981-07-30 Popov, Vitalij Fjodorovič, Severodonezk, Vorošilovgradskaja oblast' Ejektormischvorrichtung
US4186772A (en) * 1977-05-31 1980-02-05 Handleman Avrom Ringle Eductor-mixer system
PL129048B1 (en) * 1980-05-31 1984-03-31 Okregowa Spoldzielnia Mleczars Method of deeply aerating waste waters and apparatus therefor
DE3504780A1 (de) * 1985-02-13 1986-08-14 E. & M. Lamort S.A., Vitry-le-François, Marne Vorrichtung zum belueften von dispersionen
GB2248031B (en) * 1990-09-19 1994-07-06 Yakuzky Ni I Pi Almazodobyva Flotation machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3140966A1 (de) * 1981-10-15 1983-05-05 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren und flotationszelle zur flotation von kohle und erz
US4580948A (en) * 1984-07-19 1986-04-08 Helios Research Corp. Hydrokinetic amplifier with high momentum transfer coefficient
US4830790A (en) * 1987-11-04 1989-05-16 Co-Son Industries Foam generating nozzle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BAHR ET AL:: "5 Jahre Betriebserfahrung mit der pneumatischen Flotation in der Steinkohlenaufbereitung", AUFBEREITUNGS TECHNIK, vol. 28, no. 1, WIESBADEN DE, pages 1 - 9 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU183320U1 (ru) * 2018-07-16 2018-09-18 Борис Семенович Ксенофонтов Эжектор-смеситель
RU199052U1 (ru) * 2020-02-11 2020-08-11 Борис Семенович Ксенофонтов Эжектор - смеситель
RU218231U1 (ru) * 2023-01-23 2023-05-17 Борис Семенович Ксенофонтов Эжектор-смеситель

Also Published As

Publication number Publication date
ZA953265B (de) 1996-01-09
DE59506733D1 (de) 1999-10-07
EP0757591B1 (fr) 1999-09-01
EP0757591A1 (fr) 1997-02-12
BR9507501A (pt) 1997-09-02
ATE183950T1 (de) 1999-09-15
DE4414272A1 (de) 1995-10-26

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