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EP0993862B2 - Dispositif de dispersion rotatif et auto-aspirante - Google Patents

Dispositif de dispersion rotatif et auto-aspirante Download PDF

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Publication number
EP0993862B2
EP0993862B2 EP99120397A EP99120397A EP0993862B2 EP 0993862 B2 EP0993862 B2 EP 0993862B2 EP 99120397 A EP99120397 A EP 99120397A EP 99120397 A EP99120397 A EP 99120397A EP 0993862 B2 EP0993862 B2 EP 0993862B2
Authority
EP
European Patent Office
Prior art keywords
gas
dispersing device
self
aspirating
hollow shaft
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.)
Expired - Lifetime
Application number
EP99120397A
Other languages
German (de)
English (en)
Other versions
EP0993862B1 (fr
EP0993862A1 (fr
Inventor
Peter Dipl.-Ing. Forschner
Rainer Dr.-Ing. Krebs
Hans-Jürgen Dipl.-Ing. Weis
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.)
EKATO Ruehr und Mischtechnik GmbH
Original Assignee
EKATO Ruehr und Mischtechnik 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
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Application filed by EKATO Ruehr und Mischtechnik GmbH filed Critical EKATO Ruehr und Mischtechnik GmbH
Publication of EP0993862A1 publication Critical patent/EP0993862A1/fr
Publication of EP0993862B1 publication Critical patent/EP0993862B1/fr
Application granted granted Critical
Publication of EP0993862B2 publication Critical patent/EP0993862B2/fr
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer 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
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2335—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the direction of introduction of the gas relative to the stirrer
    • B01F23/23354—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the direction of introduction of the gas relative to the stirrer the gas being driven away from the rotating stirrer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/111—Centrifugal stirrers, i.e. stirrers with radial outlets; Stirrers of the turbine type, e.g. with means to guide the flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/15—Stirrers with tubes for guiding the material
    • 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
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B01F23/23311—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer axis
    • 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
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B01F23/23314—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer element
    • 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
    • B01F23/2335—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the direction of introduction of the gas relative to the stirrer
    • B01F23/23352—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the direction of introduction of the gas relative to the stirrer the gas moving perpendicular to the axis of rotation

Definitions

  • the invention relates to a self-priming, rotatable dispersing device for gases and liquids or a self-priming two-phase turbine for mixing gases and liquids according to the preamble of patent claim 1.
  • Such a self-priming, rotatable dispersing device of the aforementioned kind is known from GB 724791A.
  • the gas suction takes place via the rotationally driven hollow shaft and liquid is introduced into the interior of the turbine, so that the thorough mixing of gas and liquid takes place within the turbine space.
  • a self-priming two-phase turbine operates satisfactorily up to a gas / liquid phase ratio of about 25/30%.
  • the self-priming two-phase turbine is flooded and even with a speed increase no higher power input is no longer possible because the sucked gas remains at rest and a higher mass transfer is no longer possible. Therefore, in such a conventional self-priming two-phase turbine, the mass transfer is limited by the predetermined gas / liquid phase ratio.
  • the invention therefore aims to provide a powerful, self-priming dispersing device for gases and liquids or two-phase turbine, overcoming the difficulties described above, which allows a higher mass transfer at the lowest possible power / entry ratios and speed of the dispersing.
  • a self-priming, rotatable dispersing device for gases and liquids is provided whose features are specified in claim 1.
  • a plurality of gas passages are connected to the hollow shaft, which allow a discharge of the gas to be dispersed via gas passage orifices.
  • a negative pressure is generated by the stall, which allows the gas from the gas space is sucked against the static liquid level above the dispersing device.
  • the mixing of gas and liquid takes place outside the interior of the dispersing device, namely in the region of the gas channel openings, since the gas channels provided in the dispersing device according to the invention only lead to dispersing gas and no liquid.
  • the gas channels also generate an intensive fluid delivery, liquid movement and fluid circulation, so that one reaches a high mass transfer by the intensive contacting of the moving liquid with the sucked and dispersed gas.
  • a cover disk is provided on the upper side and underside of the gas ducts, which are axially spaced from the rotationally driven hollow shaft and between which chambers are formed in cooperation with the gas ducts.
  • the underside cover forms a closed surface connected to the hollow shaft.
  • the upper-side cover disc forms a liquid-suction gap in cooperation with the outer surface of the hollow shaft. Liquid is introduced into the chambers between the two axially spaced shrouds and the outer surfaces of the gas passages via this suction gap, which is given an intense agitation movement to enhance the mass transfer.
  • the dispersing device according to the invention is not subject to any restrictions by predetermined gas / liquid phase ratios.
  • an extremely high-performance self-priming, rotating dispersing device or self-aspirating two-phase turbine achieving high mass transfer is obtained.
  • the gas passages extend approximately radially to the hollow shaft.
  • the gas channels may extend at an acute angle to the radial, which is preferably in a range of greater than 0 and less than 25 °, and in particular approximately 15 °.
  • gas passages may be formed in the form of agitating blades to intensify fluid delivery therethrough.
  • the gas passages are formed with a curved course, so that they have a streamlined profiling with regard to intensive fluid delivery.
  • the radius of curvature in this case can in a range from D 2/3 to 3D 2, preferably about at about D 2 / are.
  • 2 D 2 denotes the largest diameter of the dispersing device, which is measured between the outer edges of two opposing gas channel discharge openings.
  • the gas channels may have a cross-section which, starting from the hollow shaft, becomes larger towards the gas channel opening.
  • each gas channel mouth opening lies in a plane at an acute angle to the gas channel wall, which preferably lies in a range of 30 ° to 60 ° and is in particular about 50 °.
  • the gas passages are arranged at regular angular intervals in the circumferential direction in order to ensure as uniform a mixing of gas and liquid as possible in the circumferential direction.
  • the gas channel orifices are directed against the direction of rotation of the hollow shaft, so that the intensive mixing of gas and liquid takes place at the outflow region of the gas channels.
  • FIG. 1 shows a perspective view of a self-priming rotating dispersing device, indicated as a whole by 1, or a self-priming two-phase turbine.
  • the dispersing device 1 has a central hollow shaft 2, which is driven via a rotary drive not shown in the direction indicated by the arrow rotation direction.
  • gas or gas to be dispersed is sucked.
  • gas channels 3 With the limited by the hollow shaft 2 interior are a plurality of circumferentially preferably arranged at regular angular intervals gas channels 3 in communicating connection, which have gas duct openings 4, which are directed counter to the direction of rotation of the hollow shaft 2 in the illustrated example.
  • a cover disk 5, 6 is respectively arranged in the dispersing device 1.
  • the lower-side cover plate 6 forms a closed surface and is fixedly connected to the outer wall of the hollow shaft 2 and the corresponding outer surface of the gas channels 3.
  • the upper-side cover plate 5 is formed as an annular body and surrounds the hollow shaft 2 concentrically and forms between the outer wall of the hollow shaft 2 an annular gap 7, which serves for remplisstechniksansaugung in between the two cover plates 5 and 6 and the gas channels 3 chambers 8.
  • the cover plates 5 and 6 may be integrally connected to the gas channels 3 accordingly.
  • the largest outer diameter of the dispersing device 1 is denoted by D 2 and is measured between the outer edges of two opposing gas channel mouths.
  • a negative pressure is generated by the stall at the gas channel openings 4, through which gas is drawn in from the gas space and the gas channels 3 against the static liquid level above the dispersing device 1.
  • This aspirated and to be dispersed gas is discharged within the dispersing device 1 in a conduit system without mixing with liquid through the gas channel openings 4 and there is a mixing of dispersing gas and liquid outside of the dispersing device 1 in the area around the gas channel openings 4.
  • Die Gaskanäle 3 effect during the rotation of the hollow shaft 2 an intensive fluid delivery and agitation also in cooperation with the chambers 8.
  • the gas channels 3 have a curved course and have a shape similar to a paddle.
  • the radius of curvature is in a range E 2/3 to 3D 2, preferably at about D 2/2.
  • the gas passages 3 have a cross-section which, starting from the connection with the hollow shaft 2, increases in the gas flow direction. As a result, the mass transfer from gas to liquid can be further enhanced. Also, furthermore, favorable material transfer ratios are still obtained by directing the gas channel gas channel openings 4 counter to the direction of rotation of the hollow shaft 2.
  • the gas channels 3 ' have a straight course and extend at an acute angle ⁇ to the radial.
  • This acute angle ⁇ is preferably in a range of greater than 0 and less than 25 ° and is preferably about 15 °.
  • the opening cross section of each gas channel opening 4 is in a plane at an acute angle ⁇ to the gas channel wall, which is preferably within an angular range of 30 ° to 60 ° and in particular is about 50 °.
  • the dispersing device according to Figure 3 also has in the circumferential direction at regular angular intervals arranged gas channels 3 ", which have a rectilinear profile similar to Figure 2 and have a cross-section, which is larger, starting from the hollow shaft 2 to the gas channel-mouth opening 4.
  • all other details of the dispersing device 1 shown in FIG. 3 essentially correspond to those which were explained above in connection with FIG.
  • FIG. 4 shows a further embodiment variant in the form of a modification with respect to the embodiment of the dispersing device 1 according to FIG. 3.
  • the gas passages 3 "'in the hollow interior of the hollow shaft 2 have a substantially constant cross section over their entire course
  • the gas channels 3 "' also extend substantially radially to the hollow shaft 2 and each have an opening cross-section in the region of the gas channel opening 4 in a plane at an acute angle ⁇ to Gaskanalwandung.
  • Combinations of differently configured gas ducts with a correspondingly different arrangement to the hollow shaft are also possible, and in particular also combined progressions of rectilinear and curved into consideration, as well as combinations with graduated extending cross sections of the gas ducts.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Dowels (AREA)
  • Coating Apparatus (AREA)
  • Nozzles (AREA)
  • Catching Or Destruction (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (9)

  1. Dispositif disperseur rotatif à amorçage automatique pour gaz et liquides avec un arbre creux entraîné en rotation (2) pour l'aspiration de gaz, le gaz à disperser pouvant s'écouler de l'arbre creux (2), séparément du liquide, par l'intermédiaire de conduits de gaz (3, 3', 3", 3"') qui sont reliés de façon à communiquer avec l'arbre creux, vers des bouches de conduits de gaz (4) disposées avec un écart dans le sens de la circonférence, bouches au niveau desquelles le mélange de gaz et de liquide peut avoir lieu à l'extérieur du dispositif disperseur (1), une contreplaque (5, 6) étant prévue sur les côtés supérieur et inférieur des conduits de gaz (3, 3', 3", 3"'), caractérisé en ce que la contreplaque (5) supérieure, en concourant avec la surface extérieure de l'arbre creux (2), forme une fente d'aspiration de liquide (7), que la contreplaque inférieure (6) forme une surface fermée, reliée à la surface extérieure de l'arbre creux (2) et qu'entre les deux contreplaques (5, 6) et les conduits de gaz (3, 3', 3", 3"') sont formées des chambres (8) communiquant avec la fente d'aspiration de liquide (7) de telle manière que les bouches de conduits de gaz (4) soient tournées dans le sens opposé à la direction de rotation de l'arbre creux (2) et qu'elles débouchent à l'extérieur des lignes circonférentielles des contreplaques.
  2. Dispositif disperseur rotatif à amorçage automatique suivant la revendication 1, caractérisé en ce que les conduits de gaz (3", 3"') s'étendent à peu près radialement par rapport à l'arbre creux (2).
  3. Dispositif disperseur rotatif à amorçage automatique suivant la revendication 1, caractérisé en ce que les conduits de gaz (3') s'étendent de manière à former avec la radiale un angle aigu (α), qui est de préférence supérieur à 0 et inférieur à 25° et plus particulièrement de 15° environ.
  4. Dispositif disperseur rotatif à amorçage automatique suivant une des revendications 1 à 3, caractérisé en ce que les conduits de gaz (3, 3', 3", 3"') sont conçus sous forme de palettes d'agitation.
  5. Dispositif disperseur rotatif à amorçage automatique suivant une des revendications précédentes, caractérisé en ce que les conduits de gaz (3) présentent une allure courbée.
  6. Dispositif disperseur rotatif à amorçage automatique suivant la revendication 5, caractérisé en ce que le rayon de courbure se situe dans une plage de D2/3 à 3D2 et de préférence à D2/2 environ, D2 étant le diamètre le plus grand entre les bords extérieurs de deux bouches de conduit de gaz opposées l'une à l'autre.
  7. Dispositif disperseur rotatif à amorçage automatique suivant une des revendications précédentes, caractérisé en ce que les conduits de gaz (3, 3', 3") présentent une section transversale qui s'agrandit depuis l'arbre creux (2) en direction de la bouche de conduit de gaz (4).
  8. Dispositif disperseur rotatif à amorçage automatique suivant une des revendications précédentes, caractérisé en ce que la section transversale d'ouverture de chaque bouche de conduit de gaz (4) est disposée sur un plan formant avec la paroi du conduit de gaz un angle aigu (β) qui est compris, de préférence, entre 30° à 60° et qui est plus particulièrement de 50° environ.
  9. Dispositif disperseur rotatif à amorçage automatique suivant une des revendications précédentes, caractérisé en ce que les conduits de gaz (3, 3', 3", 3"') sont disposés dans le sens de la circonférence, à des distances angulaires régulières.
EP99120397A 1998-10-13 1999-10-13 Dispositif de dispersion rotatif et auto-aspirante Expired - Lifetime EP0993862B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29818255U 1998-10-13
DE29818255U DE29818255U1 (de) 1998-10-13 1998-10-13 Selbstansaugende, rotierende Dispergiervorrichtung

Publications (3)

Publication Number Publication Date
EP0993862A1 EP0993862A1 (fr) 2000-04-19
EP0993862B1 EP0993862B1 (fr) 2003-06-04
EP0993862B2 true EP0993862B2 (fr) 2006-12-27

Family

ID=8063844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99120397A Expired - Lifetime EP0993862B2 (fr) 1998-10-13 1999-10-13 Dispositif de dispersion rotatif et auto-aspirante

Country Status (5)

Country Link
US (1) US6394430B1 (fr)
EP (1) EP0993862B2 (fr)
AT (1) ATE242043T1 (fr)
DE (2) DE29818255U1 (fr)
DK (1) DK0993862T4 (fr)

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US6568661B1 (en) * 2001-05-03 2003-05-27 Tomco2 Equipment Co. Diffuser for use in a carbonic acid control system
US8056886B2 (en) * 2007-01-02 2011-11-15 Jet Inc. Aspirator
JP5367567B2 (ja) * 2007-05-18 2013-12-11 株式会社帝国電機製作所 分散攪拌機および分散槽
JP5132243B2 (ja) * 2007-10-17 2013-01-30 株式会社鶴見製作所 水中曝気装置
US7997788B2 (en) * 2007-10-25 2011-08-16 Midan Industries Ltd. Submersible mixing propeller
US20090213684A1 (en) * 2007-10-25 2009-08-27 Midan Industries Ltd. Apparatus for distribution of a gas into a body of liquid
BR112016006329A2 (pt) 2013-09-27 2017-08-01 Rio Tinto Alcan Int Ltd dispositivo de impulsão de dupla função para um injetor giratório
USD742427S1 (en) 2013-09-27 2015-11-03 Rio Tinto Alcan International Limited Impeller for a rotary injector
USD823057S1 (en) * 2016-11-21 2018-07-17 Stephen Donaghy Vegetable cutter blade
USD823056S1 (en) * 2016-11-21 2018-07-17 Stephen Donaghy Vegetable cutter blade
USD823059S1 (en) * 2016-11-21 2018-07-17 Stephen Donaghy Vegetable cutter blade
USD823058S1 (en) * 2016-11-21 2018-07-17 Stephen Donaghy Vegetable cutter blade
USD823055S1 (en) * 2016-11-21 2018-07-17 Stephen Donaghy Vegetable cutter blade
DE102019101934A1 (de) 2019-01-25 2020-07-30 EKATO Rühr- und Mischtechnik GmbH Rührorganvorrichtung
EP4094838A1 (fr) * 2021-05-28 2022-11-30 Metso Outotec Finland Oy Rotor d'agencement de dispersion de gaz
CN114272806B (zh) * 2022-01-04 2022-09-06 上海银鲨机器(集团)有限公司 一种具有定向筛分功能的双轴式桨叶混料机

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Also Published As

Publication number Publication date
DK0993862T4 (da) 2007-05-07
ATE242043T1 (de) 2003-06-15
EP0993862B1 (fr) 2003-06-04
DK0993862T3 (da) 2003-09-29
EP0993862A1 (fr) 2000-04-19
DE59905813D1 (de) 2003-07-10
DE29818255U1 (de) 2000-02-17
US6394430B1 (en) 2002-05-28

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