EP0770428A1 - Flotationsanlage mit zyklischer Variation des Flüssigkeitsvolumens - Google Patents

Flotationsanlage mit zyklischer Variation des Flüssigkeitsvolumens Download PDF

Info

Publication number
EP0770428A1
EP0770428A1 EP96111906A EP96111906A EP0770428A1 EP 0770428 A1 EP0770428 A1 EP 0770428A1 EP 96111906 A EP96111906 A EP 96111906A EP 96111906 A EP96111906 A EP 96111906A EP 0770428 A1 EP0770428 A1 EP 0770428A1
Authority
EP
European Patent Office
Prior art keywords
tank
liquid
plant
clarified
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.)
Withdrawn
Application number
EP96111906A
Other languages
English (en)
French (fr)
Inventor
Antonio Caravaggio
Giuliano Saltarella
Mancini Carmine
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0770428A1 publication Critical patent/EP0770428A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • B03D1/02—Froth-flotation processes
    • 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
    • B03D1/1406—Flotation machines with special arrangement of a plurality of flotation cells, e.g. positioning a flotation cell inside another
    • 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

Definitions

  • the present invention relates to a flotation plant with cyclic liquid volume variation.
  • Flotation processes are known and used in chemical, agricultural, food, and mining industries, to separate components suspended in a liquid by making them float on the liquid.
  • the flotation process tends to separate unwanted organic substances, generally aggregated in chains or groups of cells (for example pectins and the like), from fruit juices (hereinafter generally termed musts). Separation by flotation is allowed and accelerated by using gas (often air) and/or agents to aggregate the parts to be eliminated into flocks whose density is significantly lower than that of the surrounding liquid.
  • the aim of the present invention is to solve the above drawbacks of the prior art.
  • an object of the invention is to provide a plant in which notions of the liquid that lies below the parts that have been separated or are being separated are minimized.
  • Another object of the invention is to provide a plant that allows to separately subject multiple different musts to the flotation process.
  • a flotation plant that includes at least one tank suitable to be fed with a must, characterized in that the volume of the must contained in the at least one tank varies cyclically.
  • the plant according to the invention includes a plurality of tanks 1,2... n, fed by an agent dosage device 3 and by a device 4 for enriching with air or another gas; these devices are connected to the tanks by a duct 5 and respective valves 101, 102, 100n.
  • the tanks are advantageously located within a hopper 7 that is provided with a drain 8 so that the material that overflows out of the tanks is collected by the hopper and discharged through drain 8.
  • Each tank 1, 2, n is provided with a gate valve 201, 202, 200n connected to manifolds 9 and 10.
  • the operation of the plant according to the invention is as follows.
  • the liquid to be subjected to the process which has been termed “must” merely for the sake of brevity and in a non-limitative sense, passes through the optional agent dosage device 3, through the optional enriching device 4, and then, through the valve 101, 102, 100n, enters the respective tank 1, 2, n, filling it up to a preset level.
  • An adapted level control opens valve 102 to fill tank 2, simultaneously closing the valve 101, and so forth up to tank n.
  • the tanks are filled to a level that is lower than the upper tank rim.
  • the volume of liquid that is fed into each tank is such as to make part of the volume occupied by the separated unwanted substances overflow out of the tank.
  • the overflow of the separated substances can be assisted by various kinds of mechanical systems.
  • This additional volume can be adjusted by per se known systems, which are based for example either on the presetting of infeed times or on optical turbidity detections or on other conventional systems.
  • the overflowed floated substances are conveyed from hopper 7 toward drain 8.
  • each step for the expulsion of the separated substances is followed by a step for drawing the clarified liquid, which is collected through valves 201, 202, 200n by manifolds 9 and 10 (if there are one or more musts to be treated in the same plant).
  • the duration of the settling step may be adjusted by per se known systems.
  • separation between the clarified liquid and the floated substances can be accelerated by using one or more vibrating agitators, which subject the content to small shock waves.
  • Each liquid drawing step is followed by a step for further feeding each tank and for the consequent expulsion of the separated substances.
  • each tank The dimensions of each tank are such that the infeed time of the liquid to be treated is slightly shorter than the time required for separation, so that the motions produced by infeed do not disturb, except perhaps very slightly, the upward motion of the particles that are being separated. Since this entails restrictions to the size of the tanks, the necessary production capacity is provided by introducing in a single plant a sufficient number of tanks, each of which can be fed with different kinds of must, so as to divide the production capacity among the various kinds.
  • this relation is no longer binding.
  • the total capacity Q of the plant is in fact affected by the introduction of two new parameters; the number of tanks and the volume V of liquid introduced in each cycle. For example, for an equal time available for flotation and for an equal tank volume, the capacity Q depends on the increases in the volume V. This allows to make the size of each tank independent, allowing its optimization in order to minimize the motions of the liquid during flotation.
  • a programmable controller can optimize the times of the various above described steps, for example so as to allow continuous infeed of the must to be processed, providing in practice a continuous method by the coordination of as many per se discontinuous processes as there are tanks.
  • the invention achieves the intended aim and objects, a plant having been provided in which the size of the tank or tanks is determined by the optimization of the process for separation by flotation instead of by the production capacity of the plant.
  • the introduction of liquid to be processed causes the overflow (which may or may not be assisted by mechanical devices) of the separated waste, and the total volume of liquid contained in the tank decreases during the drawing of the clarified liquid.
  • An adapted system of valves and manifolds allows to simultaneously subject various kinds of must to flotation, keeping them separated.
  • the process does not occur continuously in a single tank, but in multiple mutually connected tanks, so that the clarified liquid drawing step and the step for expelling the separated substances occur in succession in the various tanks.
  • the plant is controlled by an adjustment system which, by optimizing for each tank the times and volumes related to each step, allows continuous infeed of the liquid to be processed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biotechnology (AREA)
  • General Engineering & Computer Science (AREA)
  • Physical Water Treatments (AREA)
  • Control Of Non-Electrical Variables (AREA)
  • Jet Pumps And Other Pumps (AREA)
EP96111906A 1995-10-27 1996-07-24 Flotationsanlage mit zyklischer Variation des Flüssigkeitsvolumens Withdrawn EP0770428A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT95MI002212A IT1275810B1 (it) 1995-10-27 1995-10-27 Impianto di flottazione con variazione ciclica del volume di liquido
ITMI952212 1995-10-27

Publications (1)

Publication Number Publication Date
EP0770428A1 true EP0770428A1 (de) 1997-05-02

Family

ID=11372434

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96111906A Withdrawn EP0770428A1 (de) 1995-10-27 1996-07-24 Flotationsanlage mit zyklischer Variation des Flüssigkeitsvolumens

Country Status (2)

Country Link
EP (1) EP0770428A1 (de)
IT (1) IT1275810B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105170340A (zh) * 2015-10-12 2015-12-23 湖南有色金属研究院 一种复合充气多柱体组合式浮选设备
US20160016816A1 (en) * 2014-01-09 2016-01-21 Aerofloat (Holdings) Pty Ltd System and method for treating water or wastewater

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060481A (en) * 1974-02-19 1977-11-29 Vish Minno-Geoloshki Institute - Nis Material treating apparatus including pneumo-hydraulic vibrator
US4133746A (en) * 1976-11-23 1979-01-09 Magma Copper Company System and method of controlling froth flotation
DE3604908A1 (de) * 1986-02-17 1987-08-20 Afb Anlagen Und Filterbau Gmbh Verfahren und vorrichtung zum entfernen von oelen und schmutzstoffen aus oel-wasser-gemischen/emulsionen
DE3737512C1 (en) * 1987-11-05 1989-06-01 Tuchenhagen Otto Gmbh Continuous flotation process and appliance to carry it out
EP0325976A2 (de) * 1988-01-23 1989-08-02 Allmineral Aufbereitungstechnik Gmbh & Co. Kg Pneumatische Flotationszelle
EP0401089A1 (de) * 1989-06-01 1990-12-05 Degremont S.A. Vorrichtung zur Flüssigkeitsklärung, insbesondere Wasser, Fruchtsaft, Traubenmost und dergleichen
DE4302358A1 (en) * 1993-01-28 1993-06-09 Ingolf 8012 Riemerling De Kurtze Method and equipment for two-stages pressure discharge flotation in container - involves already cleaned water in two stages being sucked from second handling stage by dispersal pump with air or gas feed

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060481A (en) * 1974-02-19 1977-11-29 Vish Minno-Geoloshki Institute - Nis Material treating apparatus including pneumo-hydraulic vibrator
US4133746A (en) * 1976-11-23 1979-01-09 Magma Copper Company System and method of controlling froth flotation
DE3604908A1 (de) * 1986-02-17 1987-08-20 Afb Anlagen Und Filterbau Gmbh Verfahren und vorrichtung zum entfernen von oelen und schmutzstoffen aus oel-wasser-gemischen/emulsionen
DE3737512C1 (en) * 1987-11-05 1989-06-01 Tuchenhagen Otto Gmbh Continuous flotation process and appliance to carry it out
EP0325976A2 (de) * 1988-01-23 1989-08-02 Allmineral Aufbereitungstechnik Gmbh & Co. Kg Pneumatische Flotationszelle
EP0401089A1 (de) * 1989-06-01 1990-12-05 Degremont S.A. Vorrichtung zur Flüssigkeitsklärung, insbesondere Wasser, Fruchtsaft, Traubenmost und dergleichen
DE4302358A1 (en) * 1993-01-28 1993-06-09 Ingolf 8012 Riemerling De Kurtze Method and equipment for two-stages pressure discharge flotation in container - involves already cleaned water in two stages being sucked from second handling stage by dispersal pump with air or gas feed

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160016816A1 (en) * 2014-01-09 2016-01-21 Aerofloat (Holdings) Pty Ltd System and method for treating water or wastewater
CN105899464A (zh) * 2014-01-09 2016-08-24 艾罗弗洛特控股有限公司 用于处理水或废水的系统和方法
US9708197B2 (en) * 2014-01-09 2017-07-18 Aerofloat (Holdings) Pty Ltd System and method for treating water or wastewater
CN105899464B (zh) * 2014-01-09 2020-12-08 艾罗弗洛特控股有限公司 用于处理水的系统和方法
CN105170340A (zh) * 2015-10-12 2015-12-23 湖南有色金属研究院 一种复合充气多柱体组合式浮选设备
CN105170340B (zh) * 2015-10-12 2017-12-15 湖南有色金属研究院 一种复合充气多柱体组合式浮选设备

Also Published As

Publication number Publication date
ITMI952212A0 (de) 1995-10-27
IT1275810B1 (it) 1997-10-17
ITMI952212A1 (it) 1997-04-27

Similar Documents

Publication Publication Date Title
US3121680A (en) Method and apparatus for treating fluid material with suspended solids
EP3261769B1 (de) Verfahren und vorrichtung zur fragmentierung und/oder schwächung von schüttfähigem material mittels hochspannungsentladungen
US3794164A (en) Hopper type separating and classifying device
EP0366997B1 (de) Verfahren zum Entlüften einer Befüllungsanlage und Vorrichtung zur Durchführung eines solchen Verfahrens
US20220184524A1 (en) Method and Device for Controlling the Production of an Extract Using a Solid-Liquid Extraction Process
EP2818250B1 (de) Verfahren zur Aufbereitung von Müllverbrennungsschlacke
CA2661452A1 (en) Gravity mineral recovery apparatus and process
DE2704581C2 (de)
ES409494A1 (es) Procedimiento e instalacion para la clasificacion con pre- cision de separacion, de material granular suspendido en li-quidos turbios viscosos.
US2983377A (en) Process and apparatus for cleaning fruit pulp
DE10224172B4 (de) Vorrichtung und Verfahren zur Trennung von Feststoffen aus Flüssigkeiten bzw. zur Reinigung von Flüssigkeiten oder Festflüssiggemischen
US2417660A (en) Hydraulic separation of solids
DE1137716B (de) Vorrichtung zur kontinuierlichen Gegenstrombehandlung von schuettbaren Feststoffen mit Fluessigkeiten
US2782104A (en) Apparatus for the continuous lixivation, extraction or the like of vegetable matter
ITMI952212A1 (it) Impianto di flottazione con variazione ciclica del volume di liquido
US1511238A (en) Method eor treating material
US20080190823A1 (en) Mechanical Device for the Concentration of Minerals
JP4784839B2 (ja) 有機性廃棄物のメタン発酵用処理設備
DE1268560B (de) Vorrichtung zum Trennen der bei Reinigungsbehandlung von Zuckerrueben anfallenden Schwaenze und Bruchstuecke von mitgefuehrten schweren Beimengungen
AT399105B (de) Verfahren und vorrichtung zum absondern von kleinen werkstücken
DE102024104417A1 (de) Verfahren zur Beanspruchung von Partikeln mit Elektroimpulsen und Verwendung einer Vorrichtung zur Beanspruchung von Partikeln
EP0066007A1 (de) Verfahren und Einrichtung zur kontinuierlichen Vibrationsbehandlung von Metalloberflächen mit regelbarer Behandlungsdauer
US1106836A (en) Process and apparatus for the extraction of pregnant cyanid solutions from pulp.
DE4417693C1 (de) Verfahren und Vorrichtung zum Sortieren von Gemischen aus Kunststoffschnitzeln unterschiedlicher Dichte
EP0181028B1 (de) Vorrichtung und Verfahren zum Herstellen von rohem oder gebleichtem chemimechanischem Holzstoff durch ein kontinuierliches Imprägnierungsverfahren

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): ES FR IT

17P Request for examination filed

Effective date: 19971023

17Q First examination report despatched

Effective date: 20000627

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20001108