EP2150330A1 - Organe d'agitation pour milieux abrasifs - Google Patents

Organe d'agitation pour milieux abrasifs

Info

Publication number
EP2150330A1
EP2150330A1 EP08749269A EP08749269A EP2150330A1 EP 2150330 A1 EP2150330 A1 EP 2150330A1 EP 08749269 A EP08749269 A EP 08749269A EP 08749269 A EP08749269 A EP 08749269A EP 2150330 A1 EP2150330 A1 EP 2150330A1
Authority
EP
European Patent Office
Prior art keywords
stirrer
blades
blade
carrier disc
agitator
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
EP08749269A
Other languages
German (de)
English (en)
Other versions
EP2150330B1 (fr
Inventor
Wolfgang Keller
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
Application filed by EKATO Ruehr und Mischtechnik GmbH filed Critical EKATO Ruehr und Mischtechnik GmbH
Publication of EP2150330A1 publication Critical patent/EP2150330A1/fr
Application granted granted Critical
Publication of EP2150330B1 publication Critical patent/EP2150330B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B01F23/50—Mixing liquids with solids
    • B01F23/53—Mixing liquids with solids using driven stirrers
    • 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
    • B01F27/051—Stirrers characterised by their elements, materials or mechanical properties
    • B01F27/053—Stirrers characterised by their elements, materials or mechanical properties characterised by their materials
    • B01F27/0531—Stirrers characterised by their elements, materials or mechanical properties characterised by their materials with particular surface characteristics, e.g. coated or rough
    • 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
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1123—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades sickle-shaped, i.e. curved in at least one direction
    • 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
    • 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
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0721—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis parallel with respect to the rotating axis
    • 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
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0723—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis oblique with respect to the rotating axis
    • 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
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1125—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis
    • B01F27/11253—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis the blades extending oblique to the stirrer axis

Definitions

  • the invention relates to a stirrer, which is intended in particular for abrasive media.
  • abrasive media such as suspensions with high solids loading, which occur for example in the ore processing, such as oxidation autoclave for gold and copper extraction occurs due to abrasion increased wear on, which means that the stirrer only relatively short life has and then needs to be replaced.
  • abrasion-resistant coatings on the pipe members with abrasion-resistant materials, which may be hard metals, metal carbides or the like, for example.
  • abrasion-resistant materials which may be hard metals, metal carbides or the like, for example.
  • Such coatings are not only extremely expensive, but the application of coatings may also partially lead to the weakening of the substrate, resulting in further difficulties.
  • particularly resistant materials such as titanium materials.
  • disk stirrers are known as radially conveying stirrers, which comprise a carrier disk to which a plurality of stirrer blades are connected, which are connected substantially perpendicularly to the carrier disk and essentially radially thereto.
  • the carrier disk is aligned substantially horizontally in such a disk stirrer and the stirrer blades are connected to the carrier disk over approximately half the blade height.
  • Disk stirrers of this type can have a different number of stirrer blades and / or the stirrer blades can have different sized blade surfaces.
  • the invention aims to provide a stirring element, in particular for abrasive media, with a carrier disk, to which substantially perpendicular to the carrier disk and substantially radially arranged agitator blades are attached, and which has a hub for receiving a stirring shaft, which is designed abrasionsarm is and has a longer life in a proper use.
  • an agitation system in particular for abrasive media, is provided for this purpose with a carrier disk, to which agitator blades substantially radially arranged substantially perpendicular to the carrier disk are connected, and which has a hub for receiving a stirring shaft, wherein the stirring member is characterized, in that the sides of the agitator leaves which are facing away from the flow and / or the area of the blade connections on the carrier disc are designed largely free from swirl detachment.
  • the Rlickorganegeometrie in the range of the carrier disk, the Rlickorganblatt, the Rlickorganblattanitati, and the Rlickorgannabe or the like is chosen and tuned so that even with abrasive media with high solids loadings and with large amounts to reduce abrasion and to improve the service life Stirring power inputs and corresponding high peripheral speeds significantly reduce wear by abrasion or even completely exclude.
  • the Rlickorgangeometrie is changed and optimized to obtain stirrers, which have a prolonged life, thereby reducing maintenance and replacement intervals of the stirring elements and thereby significantly reduce system downtime.
  • ß of about 10 ° to 60 °, preferably from about 20 ° to 50 °
  • the respective agitator blade is largely geometrically designed vortex detachment, i. the geometry of the stirrer blade itself is optimized in a corresponding manner, in particular on the side facing away from the flow.
  • the respective stirrer blade in the region of the blade connection to the carrier disc with a in Provided flow direction facing radius R.
  • the agitator leaves can be secured on one side to the carrier disk, so that the carrier disk, especially in the wake region of the agitator blades, protects them against impact and sliding wear phenomena.
  • the carrier disk can be changed in a corresponding manner, but also the number of carrier disk parts or carrier disk elements, for which purpose preferably the carrier disk can be designed largely free from vortex separation at the area of connection of the agitator blades, and / or can comprise a plurality of carrier disk parts.
  • the carrier disc has a recess on the side of the agitator leaves facing away from the flow, in order thereby to reduce the contact surface for the abrasive effects on the carrier disc and at the attachment point of the agitator blades.
  • the stirrer blade may be completely or at least partially coated at the abrasion endangered sites with an abrasion resistant material.
  • the service life and the resistance of such a stirring element can be further improved even under extremely harsh operating conditions.
  • FIG. 1 shows a conventional embodiment of a stirring element in the form of a radially conveying disc stirrer
  • Figure 2 shows an embodiment of a Rlickorganform according to the invention according to a first preferred embodiment
  • FIG. 3 shows a further embodiment of an agitating device according to the invention with a modified blade shape of the agitator blades
  • FIG. 4 shows a further preferred embodiment with a modified blade shape and an adjustment of the agitator blades in the radial direction;
  • FIG. 5 shows a further embodiment of the invention
  • FIG. 6 shows a further embodiment according to the invention of FIG.
  • FIG. 7 shows a further embodiment of a stirring element according to FIG.
  • FIG. 8 shows an alternative preferred embodiment of a stirring element according to the invention with a partially modified carrier disk and optimized attachment points of the agitator blades on the carrier disk;
  • FIG. 9 shows a further preferred embodiment of an agitation system according to the invention with additional measures for improving the flow around the agitator blades at the blade inner edge.
  • the stirrer generally designated 1
  • the stirrer comprises a preferably horizontally arranged support disk 2, to which a plurality of stirrer blades 3 are attached perpendicular to this and substantially radially.
  • the agitator blades 3 are straight and the agitator blades 3 have a rectangular shape.
  • the agitator blades 3 are arranged symmetrically on the circumference of the carrier disc 2.
  • Each rectangular blade body 3 has a height h and a length I.
  • the Rownorgantake 3 are attached to the support plate 2 in about half the blade height h.
  • Such a stirring element 1 has a good dispersing effect, in particular in gassing, and generates a primarily radial flow direction with a corresponding pumping efficiency and a strong Gasdispergierches.
  • Figures 2 to 9 show preferred geometric modifications of such a stirring element according to the invention. Important in these geometrically modified design forms of the agitation system 1 is the fact that neither the primary flow direction, nor the pumping efficiency, the power input or the Gasdispergierlutter are adversely affected in all the modifications of the invention.
  • the agitator blades 3a are set towards the radial at an angle ⁇ which is in a range of approximately 10 ° to 50 °, preferably in a range of approximately 20 ° to 50 °.
  • ⁇ which is in a range of approximately 10 ° to 50 °, preferably in a range of approximately 20 ° to 50 °.
  • the leaf shape of the agitator leaves 3b is correspondingly optimized and changed, as can be seen in particular from the lower illustration in FIG.
  • the agitator orifice diameter is the largest outer diameter of the agitator 1c including the outer ends of the agitator blades 3c.
  • stirrers 1d to 1f are explained with reference to FIGS. 5 to 7, in which the respective stirrer blades 3d to 3f are fastened on one side to the assigned carrier disk 2d to 2f.
  • the respective carrier disk 2d to 2f forms a cover for the attached agitator blades 3d to 3f, whereby a sheet flow around the agitator blades 3d to 3f is prevented.
  • radially arranged agitator blades 3d which point essentially in the radial direction, are attached to an end face of the carrier disc 2d.
  • the stirring element 1f comprises a plurality of carrier disk parts 2f and 2f which altogether form the carrier disk. These two carrier disk parts 2f and 2f each form the outer contour of the stirring member 1f viewed in the axial direction, and the agitator blades 3f are connected and covered on both sides by the carrier disk parts 2f and 2f. This also makes it possible to effectively avoid wear-generating flow around the agitator blades 3f.
  • FIGS. 5 to 7 thus show embodiments of stirring elements 1d to 1f in which, on the one hand, the shape of the carrier disk 2e (shown in FIG. 6) or, on the other hand, the number of carrier disk parts 2f, 2f (see FIG. 7) are varied.
  • FIG. 8 shows a variant embodiment of a stirring element 1g in which the geometry and the size of the carrier plate 2g are changed.
  • 2g recesses 10 are provided on the carrier disk, whereby the attack surfaces for the abrasion are reduced.
  • FIG. 9 which shows a further embodiment variant of an agitation system 1h
  • wing-shaped elements 11 are attached to the inner edge of the agitator blades 3h and extend substantially perpendicular to the radial extent of the agitator blades 3h and have a corresponding extent b. With the help of these wing-shaped elements 11, a flow around the agitator blades 3h is prevented with negative vortex formation phenomena.
  • the design of the stirring elements 3a to 3h is such that a vortex formation and a resulting impact and sliding wear, especially in the wake region of Rownorganization 3a to 3h and at the connection of Rownorganization 3a to 3h on the support plate 2a to 2h are prevented.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

La présente invention concerne un organe d'agitation (1; 1 a - 1 h) qui est notamment conçu pour des milieux abrasifs. Cet organe d'agitation (1; 1 a - 1 h) comprend un disque support (2; 2a - 2h) auquel sont reliées des lames d'organe d'agitation (3; 3a - 3h) orientées sensiblement dans la direction radiale et de façon sensiblement perpendiculaire au disque support. Le disque support (2; 2a - 2h) comprend également un moyeu qui reçoit un arbre d'agitation de préférence entraîné par un moteur de façon appropriée. Dans l'organe d'agitation (1; 1 a - 1 h), les faces des lames (3; 3a - 3h) qui sont opposées à l'écoulement et/ou la région des liaisons des lames au disque support (2; 2a - 2h) sont conçues de manière à ne pas impliquer de formation de tourbillon dans une large mesure. Cette invention concerne à cette fin des mesures géométriques préférées concernant les lames d'organe d'agitation (3; 3a - 3h), le disque support (2; 2a - 2h) et la liaison des lames d'organe d'agitation (3; 3a - 3h) au disque support (2; 2a - 2h).
EP08749269.0A 2007-05-04 2008-04-30 Organe d'agitation pour agiter des milieux abrasifs Active EP2150330B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007021056A DE102007021056A1 (de) 2007-05-04 2007-05-04 Rührorgan
PCT/EP2008/003522 WO2008135225A1 (fr) 2007-05-04 2008-04-30 Organe d'agitation pour milieux abrasifs

Publications (2)

Publication Number Publication Date
EP2150330A1 true EP2150330A1 (fr) 2010-02-10
EP2150330B1 EP2150330B1 (fr) 2013-07-24

Family

ID=39670034

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08749269.0A Active EP2150330B1 (fr) 2007-05-04 2008-04-30 Organe d'agitation pour agiter des milieux abrasifs

Country Status (7)

Country Link
US (1) US9033572B2 (fr)
EP (1) EP2150330B1 (fr)
AU (1) AU2008248900B2 (fr)
CA (1) CA2686331C (fr)
DE (1) DE102007021056A1 (fr)
WO (1) WO2008135225A1 (fr)
ZA (1) ZA200907262B (fr)

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Publication number Priority date Publication date Assignee Title
DE102011005519A1 (de) * 2011-03-14 2012-09-20 Maschinenfabrik Gustav Eirich Gmbh & Co. Kg Verfahren zum Granulieren oder Agglomerieren sowie Werkzeug hierfür
US10252227B2 (en) 2012-03-23 2019-04-09 EKATO Ruehr- und Mischtecnik GmbH System and method for starting up stirring machines in a sediment
EP2659958B1 (fr) * 2012-05-03 2015-01-21 WEPA Apothekenbedarf GmbH & Co.KG Élément de mélange denté
CN103055753A (zh) * 2012-12-27 2013-04-24 镇江市港南电子有限公司 新型硅片研磨液的搅拌装置
CN103041727A (zh) * 2012-12-27 2013-04-17 镇江市港南电子有限公司 一种硅片研磨液的搅拌桶
CN106422845B (zh) * 2016-12-21 2022-04-15 山东大学 一种盖板式六直叶圆盘涡轮搅拌桨

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Also Published As

Publication number Publication date
CA2686331A1 (fr) 2008-11-13
AU2008248900B2 (en) 2011-09-08
AU2008248900A1 (en) 2008-11-13
US9033572B2 (en) 2015-05-19
CA2686331C (fr) 2012-07-10
EP2150330B1 (fr) 2013-07-24
US20100118643A1 (en) 2010-05-13
ZA200907262B (en) 2011-04-28
WO2008135225A1 (fr) 2008-11-13
DE102007021056A1 (de) 2008-11-06

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