EP1474223A1 - Dynamischer mischer - Google Patents
Dynamischer mischerInfo
- Publication number
- EP1474223A1 EP1474223A1 EP03731670A EP03731670A EP1474223A1 EP 1474223 A1 EP1474223 A1 EP 1474223A1 EP 03731670 A EP03731670 A EP 03731670A EP 03731670 A EP03731670 A EP 03731670A EP 1474223 A1 EP1474223 A1 EP 1474223A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stirrer
- mixer according
- housing
- mixer
- stirring
- 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
Links
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
- B01F27/07—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
- B01F27/0726—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis having stirring elements connected to the stirrer shaft each by a single radial rod, other than open frameworks
- B01F27/07261—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis having stirring elements connected to the stirrer shaft each by a single radial rod, other than open frameworks of the anchor type, i.e. the stirring elements being connected to the rods by one end and extending parallel to the shaft 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
- B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
- B01F27/1143—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections screw-shaped, e.g. worms
-
- 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
- B01F27/85—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with two or more stirrers on separate shafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2215/00—Auxiliary or complementary information in relation with mixing
- B01F2215/04—Technical information in relation with mixing
- B01F2215/0409—Relationships between different variables defining features or parameters of the apparatus or process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2215/00—Auxiliary or complementary information in relation with mixing
- B01F2215/04—Technical information in relation with mixing
- B01F2215/0413—Numerical information
- B01F2215/0418—Geometrical information
- B01F2215/0422—Numerical values of angles
-
- 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
- B01F27/1122—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades anchor-shaped
-
- 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
- B01F27/23—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis
- B01F27/232—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes
- B01F27/2322—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes with parallel axes
-
- 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
- B01F27/40—Mixers with rotor-rotor system, e.g. with intermeshing teeth
- B01F27/42—Mixers with rotor-rotor system, e.g. with intermeshing teeth with rotating surfaces next to each other, i.e. on substantially parallel axes
- B01F27/421—Mixers with rotor-rotor system, e.g. with intermeshing teeth with rotating surfaces next to each other, i.e. on substantially parallel axes provided with intermeshing elements
Definitions
- the invention relates to a mixer at least comprising a housing with a filling and emptying opening, two co-rotating stirrers and drive means for moving the stirrer, characterized in that a stirrer is arranged centrally in the housing, the stirrer being at least composed of a drive shaft attached to it a crossbar and at least one, preferably at least two, stirring arms attached to this crossbar.
- mixers are often required to avoid deposits on walls and agitators, in which the surfaces are cleaned kinematically by the mixing elements.
- examples of such devices are twin-screw extruders in the same direction.
- a mixer with a large free volume is also required for processes with longer holding times.
- An example of an apparatus that meets this requirement is described in European patent application EP 0 917 941 AI.
- Apparatus with an eight-shaped housing are unsuitable for high-pressure processes. Furthermore, apparatus with good axial mixing is required for batch processes.
- the invention relates to a mixer comprising at least one housing with a filling and emptying opening, two stirrers rotating in the same direction and
- a stirrer for moving the stirrer, characterized in that a stirrer is arranged centrally in the housing, the stirrer consisting of at least one drive shaft, attached to it at least one, preferably at least two, crossbars and at least one, preferably at least two, stirrer arm each terminally attached to this crossbar. that the other
- Stirrer consists of at least one drive shaft and one or more stirring blades and is arranged eccentrically in the housing.
- a mixer is preferred which is characterized in that, in the course of the rotation of the stirrers caused by the drive means, the stirring blades and the stirring arms pass over one another with the exception of their end faces, provided that they are not covered by the inner wall of the housing.
- the agitator arms are extended in particular in the longitudinal direction of the agitator shaft.
- a mixer is preferred in which the stirring blades and the stirring arms are of helical design. This ensures good axial mixing.
- the stirrers are rotationally symmetrical as follows. An almost complete mutual cleaning is achieved if the symmetry of the stirrer in relation to the speed of their shafts has the following mathematical relationship (I):
- Also particularly preferred is a form of the mixer in which the number j 1 and i> 1 in formula (I), where i is prime to n 2 .
- a variant of the mixer is very particularly preferred, characterized in that in formula (I) the number j> 1, the number i> 1, i being prime to n 2 and j prime to n-.
- the number of stirring blades is reduced for j> 1. With j, prime to n- . the cleaning of the agitator arms of the centric rotor is retained. However, the agitator shaft of the smaller rotor is no longer completely cleaned.
- the drive means for the eccentric stirrer is arranged on the opposite face of the housing to the drive means of the central stirrer.
- a mixer is particularly preferred in which the stirring blades and the stirring arms, when they are rotated by the drive means, completely sweep each other, with the exception of their end faces, provided that they are not covered by the inner wall of the housing. If it is not important for the mixer to be as completely self-cleaning as possible, but only the particularly short mixing time is to be used, the geometry of the mixer can be simplified somewhat. For example, concave or convex surfaces can be approximated by straight surfaces.
- a preferred mixer also has a stable design, characterized in that additional stirring arms are arranged on the underside of the crossbars and that at least one additional eccentric stirrer is arranged in the area below the crossbars in the housing. With the same container height, the length of the mixing arms is halved. If all parts in contact with the product are to be cleaned kinematically when the mixer is partially filled, the crossbars of the central stirrer should be installed in the gas space. Accordingly, a drive of the eccentric shaft from below is preferably provided.
- Transverse bars opposite the housing wall can be kept free of any contamination if, in a preferred embodiment of the invention, the transverse bars have additional grooves or ridges on their side facing the housing wall, which have a conveying effect in the radial direction, i.e. towards or away from the stirrer shaft.
- a variant of the mixer is preferred, characterized in that the
- the outer surface of the agitator arms is set at an angle ⁇ of at least 10 °, preferably at least 20 °, and less than 80 °, particularly preferably at least 30 ° and less than 60 °, relative to the radial to the central stirrer, so that it faces the inner wall of the housing.
- heating or cooling elements can be attached to the inner wall of the housing.
- the housing can also be provided with the known conventional cooling or heating devices per se, for example with a double jacket through which heat carriers can flow, electrical heating coils etc.
- the mixer according to the invention is suitable for any mixing tasks in chemical process technology, optionally also as a reactor for stirred reactions.
- the housing does not have to be completely provided with the internals according to the invention. For example, for certain processes (degassing) a gas space over the
- a mixer is particularly preferred in which the stirrer arms of the central stirrer are connected at one end to the drive shaft via crossbars, while the other ends are connected to one another via a reinforcing ring.
- FIG. 1b shows the side view of the mixer from FIG. 1 a
- the housing is again shown in section
- FIG. 1 c shows a top view of the mixer from FIG. 1 a
- the housing is again shown in section
- Figure 2 shows the isometric view of the stirrer of the mixer from Figure la 3 shows sectional views of the mixer from FIG. 1 a along the line AA in FIG. 1 a at different times during half a revolution of the larger rotor
- FIG. 4 shows the isometric representation of the rotors of a mixer variant, similar to that shown in FIG. 1a, but in the case of the smaller eccentric one
- FIG. 5 shows the section along line A-A in FIG. 1 a through a mixer according to FIG. 4.
- the relative position of the smaller rotor in relation to the central rotor was drawn in at various points in time in the course of several revolutions (representation of the relative movements)
- Figure 6 shows the isometric view of the rotors of a mixer with drive of the eccentric stirrer from below
- FIG. 7 shows an embodiment of the mixer with an additional stiffening ring.
- FIG. 8 shows an embodiment variant of the mixer according to FIG.
- Figure 9 shows another embodiment of the mixer with centrally arranged crossbeams and stirrer arms arranged above and below
- FIG. 10 shows a mixer variant with two eccentric stirrers.
- FIG. 11 shows a radial section through a mixer similar to FIG. 4 but with leaf-shaped stirring arms which have a rectangular cross section.
- Figures la, b, c show a mixer according to the invention in front, side and top views, each with the housing 1 shown in section.
- the cylindrical housing 1 is shown, the central stirrer 2 with a shaft 6 on which two crossbars 7 are attached, which support the helical stirring arms 8, 9, and the eccentric stirrer 3 with a shaft 11 on the six helical stirring blades 12 are arranged.
- An inlet 4 and an outlet 5 are attached to the top and bottom of the housing 1, respectively.
- the drive units for the stirrers 2, 3 are not shown.
- the stirring blades 12 have an approximately constant over the radius
- Thickness (In the radial section, the thickness is constant, so it increases perpendicular to the plate towards the center of the rotor.)
- the number i is prime to n 2 .
- Figure 2 shows the stirrers 2 and 3 in an isometric projection.
- Figure 3 shows a radial section through the mixer according to line A-A in Figure 1 in 15 different snapshots of the rotation of the two shafts. The respective rotation angle of the central stirrer 2 is indicated.
- FIG. 4 shows a variant of the mixer according to FIGS. 1 and 2, but four of the stirring blades 12 have been removed on the eccentric stirrer 3 '. Again:
- FIG. 5 shows a radial section through a mixer according to FIG. 4 in snapshots drawn one above the other.
- the larger stirrer 2 was held.
- the relative position of the smaller stirrer 3 ' was drawn in at different times in the course of several revolutions.
- FIG. 10 shows a modification of the mixer shape according to FIG. 4, in which two eccentric stirrers 3 "and 3 '" are combined with a central stirrer 2 in cross section.
- Figure 6 shows an embodiment of the mixer with three crossbars 7 and three stirring arms 8, 9, 9 '.
- the eccentric rotor is driven from below.
- FIG. 7 shows the stirrer of a mixer according to the invention, in which the stirrer arms of the central stirrer are connected at one end to the drive shaft 6 via crossbars 7, while the other ends are connected to one another via a reinforcing ring 13.
- This connection with a ring 13 creates a rigid frame structure, so that products with a higher viscosity can be processed with the mixer than without a reinforcement ring.
- the speed ratio here is 2: 5.
- the central stirrer carries 3 stirring arms, the eccentric stirrer 3 'has three stirring blades.
- Figure 8 shows the stirrer combination of a mixer with only one stirrer arm 8 'and a stirrer blade 12' on the eccentric stirrer 3.
- FIG. 11 shows a radial line through the stirrers 2, 3 of a variant of the mixer according to the invention.
- the construction of this mixer basically corresponds to the embodiment shown in FIG. 4, but the stirring arms 28, 29 are designed in the form of a sheet and have a rectangular cross section.
- the speed ratio of shafts 6 and 11 is 1: 2.
- the central stirrer 2 carries two stirring arms 28, 29, which are designed in sheet form, the eccentric stirrer 3 carries two stirring blades 22.
- stirrer 2, 3 is particularly suitable for arrangement within a container which has heating or cooling coils 23 on the inner wall. If the direction of rotation is set in such a way that the central stirrer 2 conveys to the outside, an intensive flow against the heating / cooling coils 23 is achieved. This improves the heat transfer to the mix.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Accessories For Mixers (AREA)
- Extraction Or Liquid Replacement (AREA)
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10202800 | 2002-01-25 | ||
DE10202800 | 2002-01-25 | ||
DE10248333 | 2002-10-17 | ||
DE10248333A DE10248333A1 (de) | 2002-01-25 | 2002-10-17 | Dynamischer Mischer |
PCT/EP2003/000216 WO2003061815A1 (de) | 2002-01-25 | 2003-01-13 | Dynamischer mischer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1474223A1 true EP1474223A1 (de) | 2004-11-10 |
EP1474223B1 EP1474223B1 (de) | 2008-12-03 |
Family
ID=27614251
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03731670A Expired - Lifetime EP1474223B1 (de) | 2002-01-25 | 2003-01-13 | Dynamischer mischer |
Country Status (10)
Country | Link |
---|---|
US (1) | US6863432B2 (de) |
EP (1) | EP1474223B1 (de) |
JP (1) | JP4738737B2 (de) |
CN (1) | CN1309462C (de) |
AT (1) | ATE416026T1 (de) |
CA (1) | CA2474062C (de) |
DE (2) | DE10248333A1 (de) |
ES (1) | ES2316762T3 (de) |
HK (1) | HK1078815A1 (de) |
WO (1) | WO2003061815A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010139470A1 (en) | 2009-06-05 | 2010-12-09 | F. Hoffmann-La Roche Ag | Combination stirrer |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6994465B2 (en) * | 2002-03-14 | 2006-02-07 | Stryker Instruments | Mixing assembly for mixing bone cement |
DE20307458U1 (de) * | 2003-05-13 | 2003-09-25 | Ekato Rühr- und Mischtechnik GmbH, 79650 Schopfheim | Vorrichtung zur Behandlung von Feststoffen |
DE10347930A1 (de) * | 2003-10-15 | 2005-05-12 | Bayer Materialscience Ag | Rührer |
DE102004034395A1 (de) | 2004-07-16 | 2006-02-16 | Bayer Technology Services Gmbh | Dynamischer Mischer |
US7740398B2 (en) * | 2006-10-04 | 2010-06-22 | Fluid Research Corporation | Dynamic mixer |
EP2272412A1 (de) * | 2009-07-07 | 2011-01-12 | Koninklijke Philips Electronics N.V. | Mischvorrichtung |
US9073019B2 (en) | 2010-04-19 | 2015-07-07 | Cheese & Whey Systems, Inc. | Blade arrangement for a food processing vat |
FR3051316B1 (fr) * | 2016-05-23 | 2018-10-19 | Seb S.A. | Pale de melange pour appareil de preparation d'aliment pour animaux |
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 |
US11739289B2 (en) | 2019-04-22 | 2023-08-29 | Lonza Ltd | Continuous blade impeller |
CN111790303A (zh) * | 2020-07-01 | 2020-10-20 | 宣城知明灯机械设计有限公司 | 一种机械制造用机床切削液快速配制装置 |
CN111896086A (zh) * | 2020-08-04 | 2020-11-06 | 桂林特邦新材料有限公司 | 粉料自动秤料机输料装置 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1733516A (en) * | 1928-12-03 | 1929-10-29 | Charles F Rodin | Agitator |
US3482823A (en) * | 1968-03-08 | 1969-12-09 | Brighton Corp | Mixing kettle |
NL6919610A (de) * | 1969-12-30 | 1971-07-02 | ||
BE794985A (fr) * | 1972-04-27 | 1973-05-29 | Petzholdt Maschf J S | Melangeur vertical |
US4198376A (en) * | 1974-02-14 | 1980-04-15 | Rhone-Progil | Vertical autoclave for bulk polymerization of vinyl chloride based polymers and copolymers |
NL8901749A (nl) * | 1989-07-07 | 1991-02-01 | Terlet Nv Maschf | Menginrichting. |
DE4005219A1 (de) * | 1990-02-20 | 1991-08-22 | Bohle L B Pharmatech Gmbh | Ruehrwerk fuer mischgranulatoren |
ATE115890T1 (de) * | 1990-01-04 | 1995-01-15 | Bohle L B Pharmatech Gmbh | Mischgranulator. |
US5372617A (en) * | 1993-05-28 | 1994-12-13 | The Charles Stark Draper Laboratory, Inc. | Hydrogen generation by hydrolysis of hydrides for undersea vehicle fuel cell energy systems |
FR2716337B1 (fr) * | 1994-02-24 | 1996-05-03 | Bertrand Machines | Dispositif de production continue et de stockage de levain naturel, liquide. |
NL1003846C2 (nl) * | 1996-08-21 | 1998-02-26 | Hosokawa Micron B V | Conische menginrichting voorzien van ten minste een mengschroef en een sneldraaiende horizontale rotor aan een verticale aandrijfas. |
FR2757350B1 (fr) * | 1996-12-23 | 1999-03-05 | Zunic Christophe | Procede et dispositif de production continue et de stockage de levain naturel liquide |
GB9812783D0 (en) | 1998-06-12 | 1998-08-12 | Cenes Ltd | High throuoghput screen |
DE19936302A1 (de) | 1999-08-02 | 2001-02-15 | Niels Fertig | Vorrichtungen und Verfahren zur Untersuchung von Ionenkanälen in Membranen |
-
2002
- 2002-10-17 DE DE10248333A patent/DE10248333A1/de not_active Withdrawn
-
2003
- 2003-01-13 EP EP03731670A patent/EP1474223B1/de not_active Expired - Lifetime
- 2003-01-13 CA CA2474062A patent/CA2474062C/en not_active Expired - Fee Related
- 2003-01-13 DE DE50310861T patent/DE50310861D1/de not_active Expired - Lifetime
- 2003-01-13 JP JP2003561751A patent/JP4738737B2/ja not_active Expired - Fee Related
- 2003-01-13 ES ES03731670T patent/ES2316762T3/es not_active Expired - Lifetime
- 2003-01-13 AT AT03731670T patent/ATE416026T1/de not_active IP Right Cessation
- 2003-01-13 WO PCT/EP2003/000216 patent/WO2003061815A1/de active Application Filing
- 2003-01-13 CN CNB038027739A patent/CN1309462C/zh not_active Expired - Fee Related
- 2003-01-24 US US10/351,241 patent/US6863432B2/en not_active Expired - Fee Related
-
2005
- 2005-11-25 HK HK05110770A patent/HK1078815A1/xx not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO03061815A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010139470A1 (en) | 2009-06-05 | 2010-12-09 | F. Hoffmann-La Roche Ag | Combination stirrer |
Also Published As
Publication number | Publication date |
---|---|
ES2316762T3 (es) | 2009-04-16 |
ATE416026T1 (de) | 2008-12-15 |
DE10248333A1 (de) | 2003-12-04 |
DE50310861D1 (de) | 2009-01-15 |
US20030147304A1 (en) | 2003-08-07 |
WO2003061815A8 (de) | 2005-03-17 |
HK1078815A1 (en) | 2006-03-24 |
WO2003061815A1 (de) | 2003-07-31 |
EP1474223B1 (de) | 2008-12-03 |
CA2474062A1 (en) | 2003-07-31 |
US6863432B2 (en) | 2005-03-08 |
CN1622851A (zh) | 2005-06-01 |
CN1309462C (zh) | 2007-04-11 |
JP2005515062A (ja) | 2005-05-26 |
JP4738737B2 (ja) | 2011-08-03 |
CA2474062C (en) | 2010-11-02 |
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