EP1776999A1 - Un mélangeur - Google Patents

Un mélangeur Download PDF

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Publication number
EP1776999A1
EP1776999A1 EP05445081A EP05445081A EP1776999A1 EP 1776999 A1 EP1776999 A1 EP 1776999A1 EP 05445081 A EP05445081 A EP 05445081A EP 05445081 A EP05445081 A EP 05445081A EP 1776999 A1 EP1776999 A1 EP 1776999A1
Authority
EP
European Patent Office
Prior art keywords
blade
axis
wing
blades
agitating member
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Withdrawn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
EP05445081A
Other languages
German (de)
English (en)
Inventor
Rebei Bel Fdhila
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.)
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
Original Assignee
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
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 ABB Research Ltd Switzerland, ABB Research Ltd Sweden filed Critical ABB Research Ltd Switzerland
Priority to EP05445081A priority Critical patent/EP1776999A1/fr
Publication of EP1776999A1 publication Critical patent/EP1776999A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • B01F27/1111—Centrifugal stirrers, i.e. stirrers with radial outlets; Stirrers of the turbine type, e.g. with means to guide the flow with a flat disc or with a disc-like element equipped with blades, e.g. Rushton turbine
    • 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
    • B01F27/115—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis
    • B01F27/1152—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis with separate elements other than discs fixed on the discs, e.g. vanes fixed on the discs

Definitions

  • the present invention refers generally to mixing of at least a first substance and a second substance.
  • the first substance is typically a liquid and the second substance one or several additives to be added to the liquid.
  • the additives can include a liquid or a solid, for instance a powder material.
  • the present invention refers to a device for mixing at least a first substance and a second substance to form a homogenous mixture according to the precharacterizing portion of claim 1.
  • the agitating member In a mixing process, especially a wet mixing process, the agitating member has a given topology or shape.
  • the topology or shape is very important for the mixing result of the mixing process and the efficiency of the mixing device.
  • Various shapes and topologies for the agitating member of mixing devices have been proposed in the past. Disadvantages of previous agitating members are that they either have a complicated shape, at least from a manufacturing point of view, or have a simple design providing a poor mixing result and mixing efficiency.
  • US-A-4,150,900 shows a slurry mixer having a tank and a rotating agitating member with four blades extending radially outwardly from the rotary axis. Each blade has one blade wing which is inclined with respect to the rotary axis.
  • SU-997770 discloses an agitating member for a mixing device.
  • the agitating member has four blades extending radially outwardly with respect to the rotary axis.
  • the blade wings are inclined with respect to the rotary axis.
  • Each blade has a radially inner blade wing and a radially outer blade wing.
  • the inner blade wing is inclined in an opposite direction in comparison with the outer blade wing.
  • the object of the present invention is to provide a mixing device, which can be manufactured in any easy and cost-efficient manner and which permits a high mixing efficiency and a proper mixing result.
  • the mixing device initially defined, which is characterized in that the agitating member comprises a base element mounted to the shaft and having a thin, disc-like shape, wherein the blades are mounted to the base element.
  • the base element may be manufactured in an easy manner, for instance through cutting or punching from a metal sheet.
  • the base element may have any suitable shape, for instance a conical shape or a substantially plane shape.
  • the base element is suitable for receiving blades of varying configuration, i.e. blades of any desired shape may easily be attached to the base element.
  • the blades may extend outwardly from the base element.
  • the base element includes at least two outwardly extending portions, wherein the blades are mounted to a respective one of the outwardly extending portions.
  • each outwardly extending portion may include a longitudinal slit into which the respective blade is introduced.
  • the slit may preferably extend in parallel to the respective blade axis. Cutout portions are formed between the outwardly extending portions in order to permit mixing in an axial direction being parallel to the rotary axis, i.e. the substances on one side of the disc-like base element may be efficiently mixed with substances on the other side of the disc-like base element.
  • each blade comprises a first blade wing being inclined with respect to the rotary surface.
  • each blade may also comprise a second blade wing arranged axially beside the first blade wing, wherein the first blade wing is inclined towards the motor and away from the longitudinal blade axis, and the second blade wing is inclined away from the motor and away from the longitudinal blade axis.
  • An agitating member, and thus a mixing device, having one or a plurality of such blades provides a very efficient mixing.
  • One of the two blade wings will provide a flow of the substances to be mixed in a radially outward and upward direction, whereas the other blade wing will provide a flow of the substances to be mixed in a radially outward and downward direction. In such a way, an upper circulating flow path and a lower circulating flow path will be created so that all of the substances to be mixed in a vessel will be influenced by the agitating member.
  • each blade includes a sheet-like element forming the first blade wing and the second blade wing.
  • the blade according to this invention can be manufactured in an easy and cost efficient manner.
  • a substantially plane sheet of any suitable material may be bent to form the two blade wings, along one or two lines, for instance.
  • one of the blade wings is shorter than the other blade wing along the rotary direction of the agitating member.
  • the mixing force exerted by the shorter blade wing will be smaller than the mixing force of the other blade wing.
  • the first blade wing extends substantially in parallel to a first extension plane and the second blade wing extends substantially in parallel to a second extension plane, wherein the first extension plane forms an angle of inclination to the second extension plane and wherein the first extension plane and the second extension plane are substantially parallel to the longitudinal blade axis.
  • the first blade wing is substantially plane.
  • the second blade wing may be substantially plane.
  • the blade includes a central portion, wherein the first blade wing and the second blade wing are connected to the common central portion.
  • a common central portion may be designed to permit mounting of the blade to the agitating member.
  • the base element may be adapted to permit mounting of the common central portion of the blade.
  • the common central portion may also be formed by the sheet-like element.
  • each blade has a curved shape seen in a cross-section perpendicular to the blade axis.
  • the longitudinal blade axis extends outwardly with respect to the rotary axis. It is possible to let the longitudinal blade axis extend substantially radially , but the longitudinal blade axis may also have a tangential component with respect to the rotary axis. Furthermore, the longitudinal blade axis may be inclined upwardly or downwardly with respect to the rotary axis.
  • the agitating member includes at least three such blades uniformly distributed around the rotary axis.
  • the at least three blades may be attached to the base element and extend outwardly with respect to the rotary axis.
  • the device comprises a vessel adapted to receive the substances to be mixed, wherein the agitating member is provided in an inner space of the vessel.
  • Fig. 1 shows a device for mixing at least a first substance and a second substance to form a homogenous mixture.
  • the device comprises a vessel 1 adapted to receive the substances to be mixed.
  • the device also comprises a motor 2, a shaft 3 extending from the motor 2 and being rotatable around a rotary axis x, and an agitating member 4 for mixing the substances.
  • the motor 2 is mounted to the vessel 1 via a number of mounting members 1 a.
  • the vessel 1 has an opening 1b through which the shaft 3 extends into an inner space 1 c of the vessel 1.
  • the vessel 1 is adapted to be positioned so that the opening 1b is turned upwards.
  • the substances are supplied to the inner space 1 c of the vessel 1 via supply members, schematically indicated with reference signs 5 and 6.
  • the supply member 5 is adapted for the supply of the first substance which can be a liquid.
  • the supply member 6 is adapted for the supply of the second substance which can be one or several additives to be added to the liquid.
  • the additives can include a liquid, or a solid product, for instance a powder material. In case several additives are to be added to the first substance, several supply members 6 can be provided.
  • the device is suitable for mixing substances, such as paint, lubricants, paper coating and filing materials, chemical products etc.
  • the agitating member 4 is attached to the shaft 3 so that the agitating member 4 will be rotated together with the shaft 3 around the rotary axis x in a rotary direction r by means of the motor 2, see Fig. 2.
  • the agitating member 4 has a given topology or shape determined by a plurality of geometrical parameters.
  • the agitating member 4 is disclosed more closely in Fig. 2.
  • the agitating member 4 comprises a base element 7, which is mounted to the shaft 3, and four blades 8, which are mounted to the base element 7.
  • Each blade 8 extends along a respective longitudinal blade axis b.
  • the longitudinal blade axis b extends outwardly with respect to the rotary axis x.
  • the agitating member 4 is shown with four blades 8 in Fig. 2, it is to be noted that the agitating 4 can include a different number of blades 8, for instance three blades 8 as shown in Fig. 6, or 1, 2, 5, 6 or more blades 8.
  • the base element 7, disclosed separately in Fig. 3, has a plane, disc-like shape.
  • the base element 7 is relatively thin, i.e. in relation to the plane disc-like extension of the base element 7. It is to be noted that the disc-like base element 7 also can have a slightly conical shape and be upwardly or downwardly inclined.
  • the base element 7 has four outwardly extending portions 7a. Each portion 7a may be formed, starting from a circular disc, see Figs. 3 and 6, by removing intermediate cutout portions 7b between the outwardly extending portions 7a. In such away, the base element 7 will have a reduced size and the flow of the mixture between the blades 8 will not be negatively influenced.
  • the cutout portions 7b permit a flow of substances to be mixed from one side of the disc-like base element 7 to the other side of the disc-like base element 7.
  • the base element 7 also could have a circular shape, i.e. an outer contour along the circular dash-dotted lines in Figs. 3 and 6.
  • Each outwardly extending portion may have a slit 9 for receiving a respective one of the blades 8. Consequently, in the embodiment disclosed, the base element 7 has four slits 9. The four blades 8 are introduced in a respective one of the slits 9, see also Figs. 4 and 5.
  • each blade comprises a first blade wing 11 and a second blade wing 12.
  • the first blade wing 11 forms an upper blade wing and the second blade wing 12 forms a lower blade wing.
  • Each blade also comprises a common central portion 13.
  • the blade wings 11 and 12 are connected to the common central portion 13. It is to be noted that the blades 8 can have an arbitrary basic shape, for instance with respect to the size and the inclination of the blade wings 11, 12.
  • the first blade wing 11 and the second blade wing 12 are thus arranged axially beside each other.
  • the first blade wing 11 is inclined upwardly, towards the motor 2 and away from the longitudinal blade axis b.
  • the second blade wing 12 is inclined downwardly away from the motor 2 and away from the longitudinal blade axis b.
  • the first blade wing 11 extends substantially in parallel to a first extension plane p,q and the second blade wing 12 extends substantially in parallel to a second extension plane p',q'.
  • the first extension plane p,q and the second extension plane p',q' are substantially parallel to the longitudinal blade axis b.
  • the extension planes p,q and p',q' are substantially plane. It is to be noted, however, that the blade wings 11 and 12 may have a somewhat curved extension.
  • the first blade wing 11 is inclined upwardly with respect to a rotary surface s defined by the rotary axis x and the blade axis b.
  • the second blade wing is inclined downwardly with respect to the rotary surface s.
  • the absolute value of the angle ⁇ of inclination of the first blade wing 11 and the angle ⁇ of inclination of the second blade wing 12 with respect to the rotary surface s may be equal, but the angle ⁇ of inclination of the first blade wing 11 may also differ from the angle ⁇ of inclination of the second blade wing.
  • the central portion 13 extends substantially perpendicularly to the rotary surface s.
  • the central portion 13 is substantially plane and extends in a plane that is substantially perpendicular to the rotary surface s.
  • the rotary surface s is substantially plane. It is to be noted however that the rotary surfaces may have another shape, for instance a conical shape.
  • the first blade wing 11 is shorter than the second blade wing 12 along the rotary direction r of the agitating member 4.
  • Each blade 8 includes a sheet-like element forming the two blade wings 11, 12. More specifically, each blade 8 may be manufactured from a sheet material, for instance a metal sheet. The blade 8 may then be bent along a bending line to form the two blade wings 11, 12. In case the blade 8, as in the embodiment disclosed, also includes a central portion 13, the upper blade wing 11 is bent along a first bending line and the lower blade wing 12 is bent along a second bending line. The manufacturing of the blade 8 may thus be obtained in an easy manner.
  • Fig. 7 shows a part of an agitating member 4 having a blade 8 according to a third embodiment.
  • the blade 8 has a curved shape seen in a cross-section perpendicular to the blade axis b.
  • the blade 8 still exhibits a first upper blade wing 11 and a second lower blade wing 12 connected to each other by a curved central portion 13.
  • the slit 9 may have a curvature corresponding to the curvature of the central portion 13 seen in a cross-section transversally to the blade axis b.
  • Fig. 8 shows an agitating member having a blade 8 according to a fourth embodiment.
  • the blade 8 has a first upper blade wing 11 and a second lower blade wing 12, which are directly connected to each other. Consequently, the blade 8 has no central portion.
  • the blade 8 is attached to the base element 7 in a slit 9 gripping the first blade wing 11.
  • the slit 9 has an inclination determining the inclination of the first blade wing 8.
  • Fig. 9 shows an agitating member 4 having a blade 8 according to a fifth embodiment.
  • the blade 8 merely has a lower blade portion 11 extending into the slit 9 and downwardly beneath the base element 7.
  • the inclination of the blade 8, i.e. the blade wing 12, is determined by the inclination of the slit 9.
  • Fig. 10 shows an agitating member 4 having a blade 8 according to a sixth embodiment.
  • the blade 8 has a central portion 13 and a lower blade wing 12.
  • the central portion 13 is slightly curved as the blade disclosed in Fig. 7.
  • Fig. 11 shows an agitating member 4 having a blade 8 according to a seventh embodiment.
  • the blade 8 has an upper blade wing 11 and a central portion 13.
  • the central portion 13 is substantially plain whereas the upper blade wing 11 is slightly curved.
  • a plurality of different shapes of the blades 8 is thus shown in the figures. It should be noted, however, that the variety of different blade shapes are possible within the scope of the following claims.
  • the blades 8 disclosed in the application should be seen as advantageous examples.
  • the blades 8 can be attached to the base element 7 in many various ways.
  • attachment screws 20 are indicated.
  • the screws 20 are threadly engaged in holes in the base element 7 and secure the blades 8 in the slits 9.
  • the screws 20 may extend through corresponding holes in the blades 8.
  • the blade axis b extends at a distance from and in parallel to a radial direction. It is to be noted that this distance can be varied or changed, and that the blade axis b could coincide with a radial direction.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
EP05445081A 2005-10-21 2005-10-21 Un mélangeur Withdrawn EP1776999A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05445081A EP1776999A1 (fr) 2005-10-21 2005-10-21 Un mélangeur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05445081A EP1776999A1 (fr) 2005-10-21 2005-10-21 Un mélangeur

Publications (1)

Publication Number Publication Date
EP1776999A1 true EP1776999A1 (fr) 2007-04-25

Family

ID=35999571

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05445081A Withdrawn EP1776999A1 (fr) 2005-10-21 2005-10-21 Un mélangeur

Country Status (1)

Country Link
EP (1) EP1776999A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2446924A (en) * 2007-02-16 2008-08-27 Spx Corp Parabolic Radial Flow Impeller
EP2237864A1 (fr) * 2007-12-21 2010-10-13 Philadelphia Mixing Solutions, Ltd. Turbine mélangeuse de gaz à structure en feuilles
EP2150330B1 (fr) * 2007-05-04 2013-07-24 EKATO Rühr- und Mischtechnik GmbH Organe d'agitation pour agiter des milieux abrasifs
WO2015082761A1 (fr) * 2013-12-04 2015-06-11 Outotec (Finland) Oy Système impulseur agitateur
US10618018B2 (en) 2016-05-25 2020-04-14 Spx Flow, Inc. Low wear radial flow impeller device and system
US20210379797A1 (en) * 2020-06-05 2021-12-09 Vermeer Manufacturing Company Mixing systems having disk assemblies
CN114653117A (zh) * 2022-05-18 2022-06-24 大连海事大学 一种海水过滤器
CN114733390A (zh) * 2022-02-28 2022-07-12 浙江汉信科技有限公司 搅拌装置及其高效搅拌桨

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2384952A (en) * 1942-09-02 1945-09-18 Mixing Equipment Co Inc Dispersing agitator
US4150900A (en) 1977-09-30 1979-04-24 Exxon Research & Engineering Co. Slurry mixer
SU997770A1 (ru) 1981-07-30 1983-02-23 Центральный Научно-Исследовательский Институт Механизации И Электрификации Сельского Хозяйства Нечерноземной Зоны Ссср Турбинна мешалка
JPS61263622A (ja) * 1985-05-17 1986-11-21 Satake Kagaku Kikai Kogyo Kk 竪型撹拌機のタ−ビン翼
EP0403091A2 (fr) * 1989-06-16 1990-12-19 Imperial Chemical Industries Plc Procédé et appareil d'émulsion
US5522989A (en) * 1992-10-14 1996-06-04 Hubert B.V. Device for aerating waste water
US5791780A (en) * 1997-04-30 1998-08-11 Chemineer, Inc. Impeller assembly with asymmetric concave blades
FR2763867A1 (fr) * 1997-06-03 1998-12-04 Grande Paroisse Sa Dispositif pour melanger et dissoudre dans un liquide des granules solides, en particulier pour la production d'engrais phospho-azotes
US5904423A (en) * 1996-12-13 1999-05-18 Ekato Ruhr-Und Mischhtechnik Gmbh Stirring element for stirring gases into liquids

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2384952A (en) * 1942-09-02 1945-09-18 Mixing Equipment Co Inc Dispersing agitator
US4150900A (en) 1977-09-30 1979-04-24 Exxon Research & Engineering Co. Slurry mixer
SU997770A1 (ru) 1981-07-30 1983-02-23 Центральный Научно-Исследовательский Институт Механизации И Электрификации Сельского Хозяйства Нечерноземной Зоны Ссср Турбинна мешалка
JPS61263622A (ja) * 1985-05-17 1986-11-21 Satake Kagaku Kikai Kogyo Kk 竪型撹拌機のタ−ビン翼
EP0403091A2 (fr) * 1989-06-16 1990-12-19 Imperial Chemical Industries Plc Procédé et appareil d'émulsion
US5522989A (en) * 1992-10-14 1996-06-04 Hubert B.V. Device for aerating waste water
US5904423A (en) * 1996-12-13 1999-05-18 Ekato Ruhr-Und Mischhtechnik Gmbh Stirring element for stirring gases into liquids
US5791780A (en) * 1997-04-30 1998-08-11 Chemineer, Inc. Impeller assembly with asymmetric concave blades
FR2763867A1 (fr) * 1997-06-03 1998-12-04 Grande Paroisse Sa Dispositif pour melanger et dissoudre dans un liquide des granules solides, en particulier pour la production d'engrais phospho-azotes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 011, no. 124 (C - 416) 17 April 1987 (1987-04-17) *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2446924A (en) * 2007-02-16 2008-08-27 Spx Corp Parabolic Radial Flow Impeller
EP2150330B1 (fr) * 2007-05-04 2013-07-24 EKATO Rühr- und Mischtechnik GmbH Organe d'agitation pour agiter des milieux abrasifs
US9033572B2 (en) 2007-05-04 2015-05-19 EKATO Rühr- und Mischtechnik GmbH Agitator for abrasive media
EP2237864A1 (fr) * 2007-12-21 2010-10-13 Philadelphia Mixing Solutions, Ltd. Turbine mélangeuse de gaz à structure en feuilles
EP2237864A4 (fr) * 2007-12-21 2014-10-22 Philadelphia Mixing Solutions Ltd Turbine mélangeuse de gaz à structure en feuilles
CN105992637B (zh) * 2013-12-04 2017-12-12 奥图泰(芬兰)公司 搅拌器叶轮装置
CN105992637A (zh) * 2013-12-04 2016-10-05 奥图泰(芬兰)公司 搅拌器叶轮装置
AU2014359034B2 (en) * 2013-12-04 2017-03-30 Outotec (Finland) Oy Agitator impeller arrangement
WO2015082761A1 (fr) * 2013-12-04 2015-06-11 Outotec (Finland) Oy Système impulseur agitateur
EA030256B1 (ru) * 2013-12-04 2018-07-31 Оутотек (Финлэнд) Ой Узел рабочего колеса мешалки
US10618018B2 (en) 2016-05-25 2020-04-14 Spx Flow, Inc. Low wear radial flow impeller device and system
EP3249237B1 (fr) * 2016-05-25 2021-02-17 SPX FLOW, Inc. Hélice à écoulement radial à faible usure et système de mélange la comprenant
US20210379797A1 (en) * 2020-06-05 2021-12-09 Vermeer Manufacturing Company Mixing systems having disk assemblies
US11890782B2 (en) * 2020-06-05 2024-02-06 Vermeer Manufacturing Company Mixing systems having disk assemblies
CN114733390A (zh) * 2022-02-28 2022-07-12 浙江汉信科技有限公司 搅拌装置及其高效搅拌桨
CN114653117A (zh) * 2022-05-18 2022-06-24 大连海事大学 一种海水过滤器

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