WO2006000170A1 - Dispositif pour produire des microbulles - Google Patents

Dispositif pour produire des microbulles Download PDF

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Publication number
WO2006000170A1
WO2006000170A1 PCT/DE2005/000531 DE2005000531W WO2006000170A1 WO 2006000170 A1 WO2006000170 A1 WO 2006000170A1 DE 2005000531 W DE2005000531 W DE 2005000531W WO 2006000170 A1 WO2006000170 A1 WO 2006000170A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
pressure
chamber
centrifugal pump
microbubbles
Prior art date
Application number
PCT/DE2005/000531
Other languages
German (de)
English (en)
Inventor
Dietrich Eichler
Frank Eichler
Original Assignee
Fan Separator 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
Priority claimed from DE102004031015A external-priority patent/DE102004031015A1/de
Priority claimed from DE200410035701 external-priority patent/DE102004035701A1/de
Priority claimed from DE200410053169 external-priority patent/DE102004053169A1/de
Application filed by Fan Separator Gmbh filed Critical Fan Separator Gmbh
Priority to DE112005002115T priority Critical patent/DE112005002115A5/de
Publication of WO2006000170A1 publication Critical patent/WO2006000170A1/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
    • B03D1/1431—Dissolved air flotation machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
    • B01F23/2326—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles adding the flowing main component by suction means, e.g. using an ejector
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
    • B01F23/2373—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media for obtaining fine bubbles, i.e. bubbles with a size below 100 µm
    • 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
    • B01F25/10—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
    • 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
    • B01F25/40—Static mixers
    • B01F25/44—Mixers in which the components are pressed through slits
    • B01F25/441—Mixers in which the components are pressed through slits characterised by the configuration of the surfaces forming the slits
    • B01F25/4412—Mixers in which the components are pressed through slits characterised by the configuration of the surfaces forming the slits the slits being formed between opposed planar surfaces, e.g. pushed again each other by springs
    • 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
    • B01F25/40—Static mixers
    • B01F25/44—Mixers in which the components are pressed through slits
    • B01F25/442—Mixers in which the components are pressed through slits characterised by the relative position of the surfaces during operation
    • B01F25/4422—Mixers in which the components are pressed through slits characterised by the relative position of the surfaces during operation the surfaces being maintained in a fixed but adjustable position, spaced from each other, therefore allowing the slit spacing to be varied
    • 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
    • B01F25/60—Pump mixers, i.e. mixing within a pump
    • B01F25/64—Pump mixers, i.e. mixing within a pump of the centrifugal-pump type, i.e. turbo-mixers
    • 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

Definitions

  • the invention relates to the generation of microbubbles for floating fei ' ner solid fractions, especially in flotation.
  • the invention relates to a unit in which both the fumigation, as well as the relaxation of the liquid takes place.
  • air is primarily sucked into the liquid, dissolved therein and then released again as microbubbles during the expansion in the cavitation zone.
  • the aim of the invention is the bubble-free preparation of the fumigated liquid and its targeted relaxation.
  • not yet dissolved air is circulated through a nozzle (12) between the suction chamber (2) and the pressure chamber (3).
  • a vacuum is generated, which falls below the vapor pressure.
  • the object of the invention relates to the generation of microbubbles formed in cavitation fields, which are used for floating fine solid fractions, in particular for flotation plants.
  • the patented DE 37 33 583 C2 brought the purified partial flow from a flotation cell with a centrifugal pump to a higher pressure level and fumigated in a pressure vessel with compressed air.
  • the generation of the microbubbles takes place in this case via a relaxation in a hollow cone nozzle.
  • the published patent application DE 40 14 088 A1 also introduced compressed air behind the pump to increase the pressure and dispensed with the pressure vessel.
  • a similar principle pursues the laid-open specification DE 198 10 650 A1.
  • the air mixture is added in front of a multi-stage centrifugal pump to increase the pressure. This can be dispensed with a compressed air generation.
  • the generation of the microbubbles takes place in a relaxation valve.
  • the short-term passage of the liquid to be fumigated by the multi-stage centrifugal pump requires that you have to work with higher pressures. Not only does this result in increased energy expenditure, it also means that relaxation must be from a higher pressure level. Inevitably, this results in larger microbubbles that are not as well able to adhere to fines as smaller bubbles.
  • the rapid passage also has the disadvantage that there are bubbles of undissolved air between the microbubbles and after the relaxation of the liquid is not completely degassed. As a result, the microbubbles continue to enlarge on the way to the flotation cell, which leads to a deterioration of the separation efficiency of the flotation plant, especially in the case of the difficult-to-remove fine components.
  • the object of the invention is therefore to carry out the solution of the air in the liquid in the lowest possible pressure level and thereby with a low energy consumption, to avoid the passage of undissolved air through the device, a targeted generation of as many small To ensure microbubbles in the cavitation fields in the micron range, as well as to transfer the largest possible proportion of existing in the gassed liquid-and there still in dissolved form present air in the expansion device in microbubbles.
  • An important feature of the invention is the utilization of the centrifugal forces created by tangential entry into the cylindrical chambers.
  • the not yet dissolved in the centrifugal pump air is conveyed by the rotation in the pressure chamber in the center and passes from here, through a nozzle between the suction and the pressure chamber and by the upstream arrangement of a weir plate, back into the suction chamber.
  • the size of the nozzle is to be sized so that only up to half of the liquid passing through the device is recirculated. To use the kinetic energy of the jet of the nozzle is directed at the same direction of rotation to the suction nozzle of the pump.
  • the demolition edges on the outer diameter of the cowpole are the same size and sharp-edged execute. Due to the high velocity of the flow and the cavitation that occurs, these edges are exposed to particularly high loads and, for reasons of wear, are hardened to be made of hard metal or hard ceramic.
  • FIG. 1 shows a section through the rotational axis of the device, wherein the centrifugal pump is shown only in the side view. Furthermore, in FIG. 1, the details of the sections AA, BB and CC for FIGS. 2 to 4 are entered.
  • FIG. 2 shows a section AA in the direction of the centrifugal pump (1) through the suction chamber (2).
  • Figure 3 and Figure 4 show the sections BB and CC away from the centrifugal pump through the pressure chamber (3).
  • FIG. 5 shows an enlargement of FIG. 1 in the area of the formation of the microbubbles.
  • Figures 6 and 7 show the region of formation of the microbubbles with three annular gaps.
  • a negative pressure is generated in the cylindrical suction chamber (2), which can be maintained with the valve (4) in the required size.
  • the liquid (5) for example purified water of a flotation plant, is thus drawn into the suction space.
  • the negative pressure further causes, via the needle valve (6), the liquid soluble in the amount of liquid (7) is sucked.
  • the amount of air depends on the pump pressure and the temperature of the fluid and is about 6-8% of the fluid flow through the device.
  • About the suction nozzle (8) get liquid and air in the centrifugal pump (1).
  • part of the air in the liquid dissolves and is introduced tangentially into the cylindrical pressure chamber (3) via the pressure connection (9) and the connection (10).
  • the tangential integration causes an intense rotation of the liquid, so that the remaining as bubbles undissolved air components are pressed into the center.
  • Suction chamber (2) and pressure chamber (3) are separated by the intermediate wall (11).
  • a nozzle (12) In the middle of this intermediate wall (11) is a nozzle (12) through which the not yet dissolved air fractions with a partial flow of the liquid in the suction chamber (2) come back.
  • the nozzle (12) is arranged so that its jet as an injector in the intake manifold (8) injected. Due to the rotation, in the outer centrifugal field of the pressure chamber (3) there is only fumigated bubble-free liquid.
  • the weir plate (13) ensures that unresolved air can only leave the pressure chamber (3) through the nozzle (12).
  • two semicircular wings (14) are arranged so that via the two slots, the liquid in the same direction of rotation flows into the rotation chamber (15).
  • the slots are dimensioned so that, starting from the amount of liquid passed through and by the further conical taper (16) in the center of the rotary chamber (15), near the annular gap of the adjustment valve (17), a high rotational speed prevails. Due to the centrifugal forces acting radially outwards, such a vacuum is created that the vapor pressure of the liquid is undershot and a rotating thin steam cone is formed. Only on de'n surfaces between liquid and vapor first traces of air can escape from the liquid again and thus form the basis for the subsequent microbubble formation and extensive degassing of the liquid.
  • the gap width of the Rinspaltes (18) is fixed.
  • the annular gap is formed by the ring (19) fixed to the conical taper (16) and the opposite valve cover (20). Both parts have the same diameter and sharp edges at an angle of at least 90 degrees.
  • the high outflow velocity of the liquid into the outflow chamber (21) also creates a vacuum on the outer surfaces of the valve cover and ring which falls below the vapor pressure of the liquid.
  • the air entering the vapor of the liquid is carried along in tracks.
  • the steam condenses through the pressure release into the outflow chamber with the typical cavitation noise.
  • the now with micro bubbles afflicted, largely degassed liquid (22) leaves the device via the pipe socket (23). For larger throughputs of liquid through the device several annular gaps are used.
  • Figures 6 and 7 show an arrangement with three annular gaps.
  • To the adjustment valve (17) are three guide pins (24) attached to the hollow cylindrical rubber springs (25) and triangular guide plates (27) are pushed.
  • the uniform stiffness of the rubber springs (25) causes the gaps to be opened or closed the same distance.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Nanotechnology (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biotechnology (AREA)
  • Physical Water Treatments (AREA)
  • Degasification And Air Bubble Elimination (AREA)

Abstract

La présente invention concerne un procédé pour produire des microbulles conçues pour faire flotter de fines matières solides notamment dans des installations de flottation. L'objet de cette invention est de mettre au point une unité dans laquelle ont lieu à la fois le gazage et la détente du liquide. De l'air dans le liquide est en priorité aspiré avant une pompe centrifuge (1) d'augmentation de pression, est dissous dans cette pompe, puis, lors de la détente dans une zone de cavitation, est à nouveau libéré sous forme de microbulles. L'objectif de la présente invention est de produire sans bulles le liquide gazé et de le détendre de manière ciblée. Selon cette invention, de l'air qui n'est pas encore dissous est mis en circuit à travers une buse (12) entre la chambre d'aspiration (2) et la chambre de pression (3). Un vide inférieur à la pression de vapeur est déjà produit dans la chambre de rotation (15). Ensuite, deux champs de cavitation annulaires se forment des deux côtés sur les deux bords de même diamètre de l'interstice annulaire. A une vitesse supérieure, l'air peut pénétrer dans la vapeur d'eau résultante et former des microbulles de l'ordre du micromètre, tout en menant le liquide à un dégazage considérable.
PCT/DE2005/000531 2004-06-26 2005-03-23 Dispositif pour produire des microbulles WO2006000170A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112005002115T DE112005002115A5 (de) 2004-06-26 2005-03-23 Vorrichtung zur Erzeugung von Mikroblasen

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE102004031015A DE102004031015A1 (de) 2004-06-26 2004-06-26 Vorrichtung zur Erzeugung von Mikroblasen
DE102004031015.7 2004-06-26
DE200410035701 DE102004035701A1 (de) 2004-07-22 2004-07-22 Entspannungsventil zur Erzeugung von Microblasen
DE102004035701.3 2004-07-22
DE200410053169 DE102004053169A1 (de) 2004-11-16 2004-11-16 Begasung von Flüssigkeiten
DE102004053169.2 2004-11-16

Publications (1)

Publication Number Publication Date
WO2006000170A1 true WO2006000170A1 (fr) 2006-01-05

Family

ID=34967134

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2005/000531 WO2006000170A1 (fr) 2004-06-26 2005-03-23 Dispositif pour produire des microbulles

Country Status (1)

Country Link
WO (1) WO2006000170A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020198698A1 (fr) * 2019-03-28 2020-10-01 Nanopure, Llc Systèmes d'injection de gaz permettant d'optimiser la formation de nanobulles dans une solution désinfectante
RU2787823C1 (ru) * 2019-03-28 2023-01-12 Нбот Системз, Ллк Система ввода газа для оптимизации формирования нанопузырьков в дезинфицирующем растворе

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1570202A (en) * 1976-03-04 1980-06-25 Traverse C Treatment of sewage
US4234349A (en) * 1979-04-16 1980-11-18 Davies Hamakua Sugar Co., A Division Of Theo. H. Davies, Ltd. Apparatus for the purification of evaporated sugar solutions
DE3729995A1 (de) * 1987-09-08 1989-03-16 Rwo Masch Armaturen App Flotationsanlage
EP1112773A1 (fr) * 1999-05-15 2001-07-04 Hirofumi Ohnari Generateur oscillant de microbulles d'air
WO2002002216A1 (fr) * 2000-06-30 2002-01-10 Tashizen Techno Works Co., Ltd. Procede et dispositif d'alimentation de petites bulles
US20040069723A1 (en) * 2001-07-05 2004-04-15 Lancer Partnership, Ltd. Method and apparatus for treating fluids

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1570202A (en) * 1976-03-04 1980-06-25 Traverse C Treatment of sewage
US4234349A (en) * 1979-04-16 1980-11-18 Davies Hamakua Sugar Co., A Division Of Theo. H. Davies, Ltd. Apparatus for the purification of evaporated sugar solutions
DE3729995A1 (de) * 1987-09-08 1989-03-16 Rwo Masch Armaturen App Flotationsanlage
EP1112773A1 (fr) * 1999-05-15 2001-07-04 Hirofumi Ohnari Generateur oscillant de microbulles d'air
WO2002002216A1 (fr) * 2000-06-30 2002-01-10 Tashizen Techno Works Co., Ltd. Procede et dispositif d'alimentation de petites bulles
US20040069723A1 (en) * 2001-07-05 2004-04-15 Lancer Partnership, Ltd. Method and apparatus for treating fluids

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020198698A1 (fr) * 2019-03-28 2020-10-01 Nanopure, Llc Systèmes d'injection de gaz permettant d'optimiser la formation de nanobulles dans une solution désinfectante
US11247923B2 (en) 2019-03-28 2022-02-15 Nbot Systems LLC Gas injection systems for optimizing nanobubble formation in a disinfecting solution
JP2022523264A (ja) * 2019-03-28 2022-04-21 エヌボット システムズ、エルエルシー 消毒溶液内のナノバブル形成を最適化するためのガス注入システム
JP7165447B2 (ja) 2019-03-28 2022-11-04 エヌボット システムズ、エルエルシー 消毒溶液内のナノバブル形成を最適化するためのガス注入システム
RU2787823C1 (ru) * 2019-03-28 2023-01-12 Нбот Системз, Ллк Система ввода газа для оптимизации формирования нанопузырьков в дезинфицирующем растворе

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