EP0514800A2 - Dispositif pour flottation pneumatique - Google Patents

Dispositif pour flottation pneumatique Download PDF

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Publication number
EP0514800A2
EP0514800A2 EP92108321A EP92108321A EP0514800A2 EP 0514800 A2 EP0514800 A2 EP 0514800A2 EP 92108321 A EP92108321 A EP 92108321A EP 92108321 A EP92108321 A EP 92108321A EP 0514800 A2 EP0514800 A2 EP 0514800A2
Authority
EP
European Patent Office
Prior art keywords
separation vessel
outlet
flotation
carrying
nozzle
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
EP92108321A
Other languages
German (de)
English (en)
Other versions
EP0514800A3 (en
EP0514800B1 (fr
Inventor
Rainer Dr. Imhof
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.)
IMHOF, RAINER, DR.
Deutz AG
Original Assignee
Kloeckner 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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0514800A2 publication Critical patent/EP0514800A2/fr
Publication of EP0514800A3 publication Critical patent/EP0514800A3/de
Application granted granted Critical
Publication of EP0514800B1 publication Critical patent/EP0514800B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B03D1/1412—Flotation machines with baffles, e.g. at the wall for redirecting settling solids
    • 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
    • B03D1/1431—Dissolved air flotation machines
    • 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

Definitions

  • the invention is directed to a device for carrying out a pneumatic flotation, formed from a separating vessel with an outlet for the flotation outlets and with a foam-absorbing overflow channel with an associated outlet and with a fumigation device arranged outside the separating vessel and connected via a pipeline to the separating vessel floating turbidity.
  • the gassing device In the case of pneumatic flotation, the gassing device generates gas bubbles which, under certain conditions, accumulate on the solids to be discharged. This creates gas bubble-solid complexes in the slurry, which are discharged as foam in the separation vessel.
  • the gassing device attempts to exert a large influence on the attachment of the gas bubbles to the solids to be discharged and thus on the formation of floatable foam-forming gas bubble-solid complexes.
  • German patent DE 31 11 506 describes a device for carrying out pneumatic flotation, in which the slurry to be flotated is supplied to the several gassing devices arranged in a ring around the separation vessel, and the slurry loaded with gas bubbles is then fed from below through several inlets, which are largely arranged in the deepest area of the separating vessel, which is conical at the bottom, are guided into the separating vessel.
  • the object of the present invention is to provide a device for carrying out a pneumatic flotation which, while avoiding the existing disadvantages, enables an improvement in the attachment of the gas bubbles to the solids to be discharged, while at the same time eliminating the large number of gassing devices and slurry inlets into the separation vessel represents a structurally simple and inexpensive version.
  • the fumigated sludge is first led from the gassing device via a pipe to the lower region of the separation vessel to a sludge outlet device with a pressure build-up nozzle, which causes a cross-sectional constriction and thus builds up pressure in the pipe.
  • a sludge outlet device with a pressure build-up nozzle, which causes a cross-sectional constriction and thus builds up pressure in the pipe.
  • smaller gas bubbles are generated in a defined manner.
  • the specific gas bubble surface area is increased and thus the accumulation of the gas bubbles on the solids to be discharged is increased. Due to the longer contact time given by the length of the pipeline, the gas bubbles are increasingly given the possibility of attachment to the solid and thus additionally have a favorable influence on the flotation result.
  • the outflow of the sludge takes place first in a pressure reduction chamber, whereby a pressure reduction takes place and only then from there in the opposite Direction via several turbidity outlet nozzles into the separation vessel.
  • the size of the pressure relief chamber and the number and size of the slurry outlet nozzles are selected so that the slurry in the pressure relief chamber is initially calmed down and then the slurry flows slowly and laminarly upwards into the separating vessel, the gas bubble size increasing as a result of the pressure reduction.
  • a control of the gas bubble size is adapted to the solid to be discharged without influencing the rate of entry of the sludge into the separation vessel.
  • the central arrangement of the gassing device means that only one gassing device is required.
  • the design of the separating vessel is additionally simplified by the further design of the separating vessel, to arrange the discharge of the flotation outlets centrally at the bottom of the separating vessel.
  • the turbidity outlet device can advantageously be raised according to the invention in order to largely avoid a collision of the upwardly flowing gassed sludge with the downwardly sedimenting flotation outlets, and furthermore the conical displacement body can Foam area should be limited in a ring shape so that a certain desired foam flow rate (in the direction of the overflow channel) is not undershot.
  • the flotation device consists of a separating vessel (10) which tapers conically downwards, with a foam overflow at the upper end of the cylindrical part of the separating vessel and with a foam-absorbing overflow channel (20) and associated lateral foam discharge (11) and a central outlet ( 12) for the entire flotation outlets (28) at the lower end of the conical part of the separation vessel.
  • a cone-shaped, vertically displaceable displacement body (17) At the upper end of the separation vessel (10) there is a cone-shaped, vertically displaceable displacement body (17).
  • Inside the separation vessel (10) is in the lower one Area a short cylindrical downwardly tapering inner tube (14) with an outlet opening (18) for the flotation outlets at the lower end of the conical part.
  • the vertically displaceable slurry outlet device (13) is located in this inner tube and is connected to the gassing device (15) arranged centrally above the separation vessel (10) by a pipeline (16).
  • the pipeline (16) in the turbidity outlet device (13) opens into a pressure build-up nozzle (19), which has a pressure reduction chamber (21) and this in turn via a turbidity outlet nozzle (22) with the separation vessel (10). communicates.
  • the slurry (23) to be floated is fumigated in the gassing device (15) and reaches the pressure build-up nozzle (19) via the pipeline (16), which creates a defined pressure build-up within the pipeline (16) due to its cross-sectional constriction.
  • the pressurized fumigated slurry reaches the pressure reduction chamber (21) at high flow velocity, where, due to the available chamber volume in connection with the slurry outlet nozzles (22), the effective cross section of which is at least twice as large as the cross section of the pressure build-up nozzles (19 ), the pressure is reduced to such an extent that the sludge can emerge from the sludge outlet nozzles (22) at low speed and without turbulence into the separation vessel (10).
  • Large flotation outlet particles (26) which sediment down immediately after leaving the turbid outlet nozzles, are guided through the conically tapering part of the inner tube (14) to the outlet opening (18) and arrive thence to the common outlet for the flotation outlets (12).

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biotechnology (AREA)
  • General Engineering & Computer Science (AREA)
  • Physical Water Treatments (AREA)
  • Paper (AREA)
  • Fish Paste Products (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Treatment Of Sludge (AREA)
EP92108321A 1991-05-22 1992-05-16 Dispositif pour flottation pneumatique Expired - Lifetime EP0514800B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4116645 1991-05-22
DE4116645A DE4116645A1 (de) 1991-05-22 1991-05-22 Vorrichtung zur durchfuehrung einer pneumatischen flotation

Publications (3)

Publication Number Publication Date
EP0514800A2 true EP0514800A2 (fr) 1992-11-25
EP0514800A3 EP0514800A3 (en) 1995-02-22
EP0514800B1 EP0514800B1 (fr) 1996-07-31

Family

ID=6432144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92108321A Expired - Lifetime EP0514800B1 (fr) 1991-05-22 1992-05-16 Dispositif pour flottation pneumatique

Country Status (7)

Country Link
EP (1) EP0514800B1 (fr)
AT (1) ATE140882T1 (fr)
CS (1) CS154592A3 (fr)
DE (2) DE4116645A1 (fr)
ES (1) ES2090409T3 (fr)
HU (1) HU211098B (fr)
PL (1) PL167874B1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2393023C2 (ru) * 2008-05-29 2010-06-27 Федеральное государственное образовательное учреждение высшего профессионального образования "Государственный технологический университет "Московский институт стали и сплавов" Пневматическая флотационная машина
RU2491132C1 (ru) * 2012-03-01 2013-08-27 Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Национальный исследовательский технологический университет "МИСиС" Пневматическая флотационная машина
RU2614170C1 (ru) * 2016-05-23 2017-03-23 Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" Пневматическая флотационная машина
CN115739405A (zh) * 2022-11-09 2023-03-07 淮北矿业股份有限公司涡北选煤厂 一种利用劣质煤洗选炼焦精煤的方法和装置
CN117861870A (zh) * 2024-03-12 2024-04-12 北矿科技股份有限公司 浮选设备以及浮选系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2132749C1 (ru) * 1998-05-12 1999-07-10 Открытое акционерное общество "Уралмеханобр" Флотационная пневматическая колонная машина
RU2191074C1 (ru) * 2001-11-06 2002-10-20 Видуецкий Марк Григорьевич Флотационная пневматическая колонная машина

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2130920A (en) * 1936-07-06 1938-09-20 Mays Mfg Company Inc Memorandum-pad holder for telephones
FR2206985B1 (fr) * 1972-11-22 1977-04-22 Saint Gobain Techn Nouvelles
US4338192A (en) * 1978-12-18 1982-07-06 Ingersoll-Rand Company Clarifier bubble generation and distribution nozzle
US4255262A (en) * 1979-03-26 1981-03-10 U.S. Filter Corporation Hydraulic powered mixing apparatus
DE3101221C2 (de) * 1981-01-16 1983-09-22 J.M. Voith Gmbh, 7920 Heidenheim "Einrichtung zur Schaumflotation"
DE3144386C2 (de) * 1981-11-07 1983-12-29 J.M. Voith Gmbh, 7920 Heidenheim Injektorflotationsapparat
FR2550469B1 (fr) * 1983-08-09 1985-10-04 Alsthom Atlantique Injecteur de microbulles
EP0146235A3 (fr) * 1983-10-21 1987-02-04 The University Of Newcastle Research Associates Limited Procédé de flottation
NL8602243A (nl) * 1986-09-05 1988-04-05 Facet Ind B V Inrichting voor het door flotatie zuiveren van vloeistof en daarin toe te passen vloeistof-injekteur.
DE3733583C2 (de) * 1987-10-03 1996-04-18 Fan Engineering Gmbh Vorrichtung zur Erzeugung von Mikroblasen aus begasten Flüssigkeiten für die Flotation von Schlämmen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2393023C2 (ru) * 2008-05-29 2010-06-27 Федеральное государственное образовательное учреждение высшего профессионального образования "Государственный технологический университет "Московский институт стали и сплавов" Пневматическая флотационная машина
RU2491132C1 (ru) * 2012-03-01 2013-08-27 Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Национальный исследовательский технологический университет "МИСиС" Пневматическая флотационная машина
RU2614170C1 (ru) * 2016-05-23 2017-03-23 Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" Пневматическая флотационная машина
CN115739405A (zh) * 2022-11-09 2023-03-07 淮北矿业股份有限公司涡北选煤厂 一种利用劣质煤洗选炼焦精煤的方法和装置
CN115739405B (zh) * 2022-11-09 2025-07-18 淮北矿业股份有限公司涡北选煤厂 一种利用劣质煤洗选炼焦精煤的方法和装置
CN117861870A (zh) * 2024-03-12 2024-04-12 北矿科技股份有限公司 浮选设备以及浮选系统

Also Published As

Publication number Publication date
EP0514800A3 (en) 1995-02-22
ATE140882T1 (de) 1996-08-15
HU211098B (en) 1995-10-30
HU9201693D0 (en) 1992-08-28
ES2090409T3 (es) 1996-10-16
CS154592A3 (en) 1992-12-16
EP0514800B1 (fr) 1996-07-31
PL294649A1 (en) 1993-01-25
HUT62827A (en) 1993-06-28
PL167874B1 (en) 1995-11-30
DE59206835D1 (de) 1996-09-05
DE4116645A1 (de) 1992-11-26

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