EP1123731A2 - Dispositif mélangeur - Google Patents

Dispositif mélangeur Download PDF

Info

Publication number
EP1123731A2
EP1123731A2 EP01103111A EP01103111A EP1123731A2 EP 1123731 A2 EP1123731 A2 EP 1123731A2 EP 01103111 A EP01103111 A EP 01103111A EP 01103111 A EP01103111 A EP 01103111A EP 1123731 A2 EP1123731 A2 EP 1123731A2
Authority
EP
European Patent Office
Prior art keywords
approximately
stirring
stirring device
angle
mixing
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
EP01103111A
Other languages
German (de)
English (en)
Other versions
EP1123731B8 (fr
EP1123731A3 (fr
EP1123731B1 (fr
Inventor
Uwe Dipl.-Ing. Schmidt (Fh)
Dirk Stähler
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 Solidmix 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 EP1123731A2 publication Critical patent/EP1123731A2/fr
Publication of EP1123731A3 publication Critical patent/EP1123731A3/fr
Application granted granted Critical
Publication of EP1123731B1 publication Critical patent/EP1123731B1/fr
Publication of EP1123731B8 publication Critical patent/EP1123731B8/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B01F27/112—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
    • B01F27/09—Stirrers characterised by the mounting of the stirrers with respect to the receptacle
    • B01F27/091—Stirrers characterised by the mounting of the stirrers with respect to the receptacle with elements co-operating with receptacle wall or bottom, e.g. for scraping the receptacle wall
    • 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
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/86—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis co-operating with deflectors or baffles fixed to the receptacle
    • B01F27/862—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis co-operating with deflectors or baffles fixed to the receptacle the baffles being adjustable or movable
    • 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
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/83—Mixing plants specially adapted for mixing in combination with disintegrating operations
    • B01F33/833—Devices with several tools rotating about different axis in the same receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
    • B01F33/8361—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating
    • B01F33/83611—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating by cutting

Definitions

  • the invention relates to a stirring device, in particular for mixing, Granulating and drying solids, with at least one stirrer, which, for example, has two stirring blades that can be driven by a motor Shaft are connected.
  • the stirrer can also be used to heat and cool solids be used, but also to carry out chemical reactions, for evaporating solvents, or for evaporation or Cooling crystallization.
  • the object of the invention is, in particular, a high mixing quality and a to achieve high internal heat transfer.
  • this is achieved in that the particular plane trained stirring blades at an angle ⁇ of about 15 ° to about 60 ° Horizontal are arranged.
  • the inner and outer peripheral edges expediently have each Stirrer blade elliptical shape.
  • Each stirring blade advantageously has the smallest at its inner end and the greatest width at its outer end.
  • At least one of the stirring blades is expediently on its inside Provide the end with a bottom blade that forms a scraper.
  • the bottom sheet has the largest and at its upper end the smallest width at its lower end.
  • the bottom sheet is advantageously twisted in a helical manner and in an angle ⁇ to the horizontal, the angle ⁇ of increases from top to bottom and is in the range from 5 ° to approximately 55 °.
  • each stirring blade has a top at its outer end equipped especially flat side sheet, the side sheets under an inclination angle ⁇ of about 1 ° to about 30 ° to the vertical are.
  • the side sheets expediently have a clearance angle ⁇ from about 1 ° to about 30 ° to the inner wall of the stirring container 12.
  • the leading edge or edge has each Side sheet a substantially constant distance from the cylindrical Inner wall of the stirred tank, the distance expediently about Is 5 to 10 mm.
  • each side sheet advantageously has an elliptical shape.
  • a can be above the stirring blades preferably flat baffle installed, the bottom edge in an angle ⁇ to the horizontal, which is in the range of about 15 ° to Is 60 °.
  • the baffle is expediently set at an angle ⁇ , which is in a range from approximately 0 ° to approximately 75 °, to a radial which passes through the central axis of the agitator shaft and through the central axis of the baffle 32.
  • At least one motor-driven chopper be installed, which carries a plurality of knives at its end.
  • the peripheral speed the chopper is expediently above 15 m / sec.
  • the stirred tank preferably consists of an upper cylindrical part and an adjoining lower conical bottom part, the cone angle of which is in the range from approximately 60 ° to approximately 120 ° and in particular is essentially 90 °.
  • the agitator arms are essentially in the conical part of the Stirred container arranged.
  • the ratio of the heights of the conical part to the cylindrical part of the The stirred tank is advantageously in the range from about 1: 1 to about 2: 1.
  • FIG. 1 shows schematically a stirring device 10 with only one dot-dash line indicated stirring container 12, which consists of an upper cylindrical part 14 and a lower conical bottom part adjoining this 16 is formed.
  • the cylindrical part 14 is closed at the top by a domed cover 18, while at the lower end of the conical bottom part 16 an outlet 20th is trained.
  • a drive shaft 22 extends through the cover 18 from above are down into the stirred tank 12 and on the shaft 22 attached by means of a spar 24 two stirring blades 26, which essentially housed in the conical bottom part 26 of the stirred tank 12 are and from the bottom to the outside at an angle ⁇ to the horizontal run, which is in the range of about 15 ° to about 60 °.
  • the cone angle of the bottom part 16 of the stirred tank 12 is in one Range from about 60 ° to about 120 ° and is preferably substantially 90 °.
  • the bottom sheet 28, whose lower end 50 extends into the outlet 20 extends, is twisted like a helix and at an angle ⁇ to Turned downwards or to the horizontal, from top to bottom increases at the bottom and is in the range from approximately 5 ° to approximately 55 °.
  • the geometry of the stirring blades 26 is through an oblique cut creates a cone so that the inner peripheral edge 40 and the outer
  • the peripheral edge 42 of each stirring blade 26 has an elliptical shape and the Stirrer blades 26 themselves remain flat.
  • the width of the stirring blades 26 increases from the inside out and each Stirrer blade 26 has the smallest width and at its inner end 44 its outer end 46 the greatest width.
  • the width of the bottom sheet 28 decreases from top to bottom and it therefore has its greatest width at its upper end 48 and its narrowest width at its lower end 50.
  • Each stirring blade 26 has a side blade at its upper, outer end 46 30 firmly connected.
  • the side sheets are flat and their geometry is generated by an oblique cut through a cylinder, at least the leading edge or edge 52 of the side sheets 30 has an elliptical shape.
  • the side blades 30 With respect to the inner wall of the stirring container 12, the side blades 30 a clearance angle ⁇ of approximately 1 ° to approximately 30 °, as shown in FIG. 4.
  • This angle ⁇ is determined as follows.
  • a line 64 is drawn between the center M of the shaft 22 and the intersection P of the Side sheet 30 with the stirring blade 26, a line 64 is drawn.
  • the perpendicular 66 on this line 64 at point P is the reference line for the angle ⁇ , between the vertical 66 and the section line 68 between the stirring blade 26 and the side blade 30 extends.
  • intersection point P denotes the direction of rotation D of the stirring device front end of cutting line 68.
  • the leading edge 52 has each side sheet 30 a substantially constant distance 58 of about 5mm to 10mm to the cylindrical inner wall 56 of the mixing container 12.
  • Figures 3 and 4 show embodiments in which auxiliary devices in Form of a baffle 32 and / or a chopper 34 from above in the stirred tank 12 are installed.
  • baffle 32 can be a baffle 32 or a chopper 34 or it both devices can be used if necessary.
  • the baffle 32 preferably in the form of a flat plate is installed vertically from above in the stirred tank 12 and has how shown, approximately V-shaped shape, with its lower edge 60 a Angle ⁇ to the horizontal forms in the range of about 15 ° to about 60 ° lies.
  • the edge 60 runs from the bottom inside to the top outside.
  • the baffle 32 is at an angle in the direction of rotation D. ⁇ to a radial 62, which is in a range from about 0 ° to about 75 °.
  • the radial 62 runs through the central axis of the shaft 22 and through the Center axis of baffle 32. ( Figure 4)
  • the chopper 34 is also from above through the lid 18 in the Stirring tank 12 inserted and immersed like the baffle 32 in the material to be stirred a, as Figure 3 shows.
  • the chopper 34 consists of a motor-driven shaft 36 which a plurality of knives or other suitable at its lower end Tools, through which any lumps in the mix are separated or can be resolved.
  • the drive, not shown, for the chopper 34 is attached to the cover 18 and the shaft 36 is eccentric between the shaft 22 and the Stirring blades 26.
  • the peripheral speed of the chopper 34 is preferably over 15 m / sec, which locally introduces very high shear forces into the product can be. As a result, lumps and clumps that are hard to catch are Tubers cut up in the product.
  • the knife 34 can, as above executed, other tools can be used depending on the Product properties produce more or less shear in the product.
  • the baffle 32 reduces the rotational movement in the material to be stirred, moreover it leads to larger lumps that may be present during drying have formed the stirring blades to where they are divided.
  • the spars 24 are at the lower end of the Shaft 22 and arranged in the lower half of the conical bottom part 16, for as much free space as possible for internals such as baffle 32 or the chopper 34 to create.
  • FIG. 5 shows, it can be in addition to the spar pair 24 and above the latter a further pair of spars 54 for holding the stirring blades 26 the drive shaft 22 can be provided if necessary.
  • the stirring device according to the invention works as follows:
  • the stirring blades 26 rotate in the direction of rotation D, the product is along the Wall of the stirred tank at an angle and then conveyed axially upwards and then in the area of the product surface through the side sheets 30 to the center transported. In the middle area, the product is then the mass flow pulled down, creating a spacious, essentially dead space free Mixing movement arises, the short mixing times and high heat transfer guaranteed.
  • the peripheral speed is so high that easily disintegrating lumps and tubers due to the shear stresses are generated by the stirring blades 26, are unlocked.
  • Moderately difficult disintegrating lumps can be created by installing one or more Baffles 32 are disassembled while clumps are hard to disintegrate the chopper 34 installed eccentrically from above are destroyed.
  • the bottom sheet 28 forming a bottom clearer allows a dead space free Mixing in the lower region of the conical bottom part 16 above the Exhaust valve, not shown.
  • the downward increasing described above Angle of attack ⁇ of the base sheet 28 is used for a good mixing effect to maintain, as this with the same setting angle would decrease because the peripheral speed on the bottom sheet 28 to Exhaust valve is getting lower.
  • the increasing angle of attack ⁇ compensates for this effect and ensures that the entire container.
  • the above-mentioned narrow wall distance of the side blades 30 to the inner wall of the stirred tank 12 at least substantially prevents wall coverings and crust formation and thus ensures good heat transfer coefficients.
  • the stirring device according to the invention is therefore not only suitable for free-flowing products, but also for pasty and tubers when drying educational products, such as those used in pharmaceuticals Industry occur.
  • the stirring device enables a high mixing quality through complete product circulation. It enables a high one internal heat transfer and a uniform temperature profile and thus a large surface renewal and good removal without recondensation in the cooler product.
  • the high heat transfer area leads to shorter drying times and cooling times. Allow the stirring blades a good one especially in connection with baffles and choppers Coarse shredding and quick and easy disintegration of lumps and tubers.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Confectionery (AREA)
EP01103111A 2000-02-11 2001-02-09 Dispositif mélangeur Expired - Lifetime EP1123731B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10006253A DE10006253A1 (de) 2000-02-11 2000-02-11 Rührvorrichtung
DE10006253 2000-02-11

Publications (4)

Publication Number Publication Date
EP1123731A2 true EP1123731A2 (fr) 2001-08-16
EP1123731A3 EP1123731A3 (fr) 2003-05-28
EP1123731B1 EP1123731B1 (fr) 2005-07-06
EP1123731B8 EP1123731B8 (fr) 2005-08-31

Family

ID=7630688

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01103111A Expired - Lifetime EP1123731B8 (fr) 2000-02-11 2001-02-09 Dispositif mélangeur

Country Status (5)

Country Link
US (1) US6612733B2 (fr)
EP (1) EP1123731B8 (fr)
AT (1) ATE299042T1 (fr)
DE (2) DE10006253A1 (fr)
ES (1) ES2241694T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1287879A3 (fr) * 2001-08-31 2003-03-26 Xerox Corporation Outil de mélange à grande intensité avec des barres optimisées pour augmenter l'intensité du mélange de toners
WO2007129340A1 (fr) * 2006-05-10 2007-11-15 Comber S.R.L. Séchoir à base conique
DE10359379B4 (de) * 2002-12-28 2010-10-28 Backhaus, Martin, Dipl.-Ing. Schraubenbandmischer
EP2460581A1 (fr) * 2009-03-04 2012-06-06 Dr. HERFELD GmbH & Co. KG Procédé de mélange de matières en forme de poudre et/ou de granulés, et machine de mélange
CN120189844A (zh) * 2025-05-26 2025-06-24 浙江汉信科技有限公司 搅拌装置

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USD664262S1 (en) * 2010-09-24 2012-07-24 Lonza Ag Impeller arrangement for fermenter
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US9557089B2 (en) * 2013-08-28 2017-01-31 Whirlpool Corporation Stir stick and breaker walls for an ice container
DE102014110542A1 (de) * 2014-07-25 2016-01-28 EKATO Rühr- und Mischtechnik GmbH Rührorganvorrichtung
ES2759917T3 (es) * 2015-06-12 2020-05-12 De Longhi Appliances Srl Aparato con un dispositivo de mezcla para cocinar alimentos
CN107551595B (zh) * 2016-08-23 2022-09-09 浙江益泰机械制造有限公司 一种搅拌式结晶器
CN106135332B (zh) * 2016-08-29 2019-01-29 江门市新会区浩信电器制造有限公司 一种揉面机
CN106766767A (zh) * 2016-11-29 2017-05-31 东莞市恒荣机械股份有限公司 一种新型物料干燥机
CN108201839A (zh) * 2017-12-30 2018-06-26 李国俊 一种用于生产聚氯乙烯的搅拌装置
JP2020203256A (ja) * 2019-06-18 2020-12-24 セイコーエプソン株式会社 攪拌装置
CN114470125B (zh) * 2022-01-14 2023-07-21 张金玉 一种牛皮癣治理的中药制备方法
CN115138285B (zh) * 2022-08-31 2022-12-13 杰维工业设备(长沙)有限公司 一种分散混合机及其混合方法
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US20250308318A1 (en) * 2024-03-26 2025-10-02 Follett Products, Llc Metered iced dispenser system utilizing a brushless direct current gearmotor

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1287879A3 (fr) * 2001-08-31 2003-03-26 Xerox Corporation Outil de mélange à grande intensité avec des barres optimisées pour augmenter l'intensité du mélange de toners
US6752561B2 (en) * 2001-08-31 2004-06-22 Xerox Corporation High intensity blending tool with optimized risers for increased intensity when blending toners
US6805481B2 (en) 2001-08-31 2004-10-19 Xerox Corporation High intensity blending tool with optimized risers for increased intensity when blending toners
DE10359379B4 (de) * 2002-12-28 2010-10-28 Backhaus, Martin, Dipl.-Ing. Schraubenbandmischer
WO2007129340A1 (fr) * 2006-05-10 2007-11-15 Comber S.R.L. Séchoir à base conique
EP2460581A1 (fr) * 2009-03-04 2012-06-06 Dr. HERFELD GmbH & Co. KG Procédé de mélange de matières en forme de poudre et/ou de granulés, et machine de mélange
US8678639B2 (en) 2009-03-04 2014-03-25 Dr. Herfeld Gmbh & Co. Kg Mixing machine
CN120189844A (zh) * 2025-05-26 2025-06-24 浙江汉信科技有限公司 搅拌装置

Also Published As

Publication number Publication date
ATE299042T1 (de) 2005-07-15
DE10006253A1 (de) 2001-08-16
EP1123731B8 (fr) 2005-08-31
US6612733B2 (en) 2003-09-02
US20010019515A1 (en) 2001-09-06
EP1123731A3 (fr) 2003-05-28
EP1123731B1 (fr) 2005-07-06
ES2241694T3 (es) 2005-11-01
DE50106662D1 (de) 2005-08-11

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