EP1885482B1 - Dispositif de melange et d'homogeneisation de fluides visqueux - Google Patents

Dispositif de melange et d'homogeneisation de fluides visqueux Download PDF

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Publication number
EP1885482B1
EP1885482B1 EP06722713A EP06722713A EP1885482B1 EP 1885482 B1 EP1885482 B1 EP 1885482B1 EP 06722713 A EP06722713 A EP 06722713A EP 06722713 A EP06722713 A EP 06722713A EP 1885482 B1 EP1885482 B1 EP 1885482B1
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EP
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Prior art keywords
mixing
tank
homogenizer
scraping
boiler
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Not-in-force
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EP06722713A
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German (de)
English (en)
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EP1885482A1 (fr
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Ludger Fischer
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    • 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
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/47—Mixing liquids with liquids; Emulsifying involving high-viscosity liquids, e.g. asphalt
    • 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
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/41—Emulsifying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
    • B01F25/52—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle with a rotary stirrer in the recirculation tube
    • 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
    • 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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/62—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis comprising liquid feeding, e.g. spraying means
    • B01F27/621—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis comprising liquid feeding, e.g. spraying means the liquid being fed through the shaft of the 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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B01F27/701—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers
    • B01F27/704—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers with stirrers facing each other, i.e. supported by opposite walls of the receptacle
    • 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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/71—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with propellers
    • 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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/72—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices
    • B01F27/724—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices with a single helix closely surrounded by a casing
    • 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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/72—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices
    • B01F27/726—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices with two helices with opposite pitch on the same shaft; with two helices on the same axis, driven in opposite directions or at different speeds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/10—Maintenance of mixers
    • B01F35/145—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means
    • B01F35/1452—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids
    • B01F35/1453—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids by means of jets of fluid, e.g. air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2113—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2115—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/213—Measuring of the properties of the mixtures, e.g. temperature, density or colour
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/2132—Concentration, pH, pOH, p(ION) or oxygen-demand
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/45—Closures or doors specially adapted for mixing receptacles; Operating mechanisms therefor
    • B01F35/451—Closures or doors specially adapted for mixing receptacles; Operating mechanisms therefor by rotating them about an axis parallel to the plane of the opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/75—Discharge mechanisms
    • B01F35/751—Discharging by opening a gate, e.g. using discharge paddles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/75—Discharge mechanisms
    • B01F35/754—Discharge mechanisms characterised by the means for discharging the components from the mixer
    • B01F35/7548—Discharge mechanisms characterised by the means for discharging the components from the mixer using tilting or pivoting means for emptying the mixing receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/92—Heating or cooling systems for heating the outside of the receptacle, e.g. heated jackets or burners
    • 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
    • B01F27/09—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
    • B01F27/05—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
    • B01F27/1145—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections ribbon shaped with an open space between the helical ribbon flight and 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
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/272—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed axially between the surfaces of the rotor and the stator, e.g. the stator rotor system formed by conical or cylindrical surfaces
    • 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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined 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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/61—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis about an inclined axis
    • 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
    • B01F33/70—Mixers specially adapted for working at sub- or super-atmospheric pressure, e.g. combined with de-foaming

Definitions

  • Such a device is for example from the DE 37 28 710 A1 known, which describes a mixer with mixer and crusher.
  • Another device is off DE 1 184 325 known.
  • the invention relates to the preparation of emulsions, such as creams of relatively high viscosity, an essential basic operation being homogenization, which is carried out in a so-called homogenizer.
  • the mixing vessel or vessel containing the product to be homogenized, to which the homogenizer belongs, is equipped with a mixing device, the essential functions being: to ensure a uniform distribution of the contents of the vessel and of the material returned by the homogenizer; Heat supply and removal; Stripping the inner wall of the boiler, in particular to avoid encrustation and to improve the heat transfer; and replacing the contents of the vessel from bottom to top for improved degassing of the product.
  • horizontal mixers have not been used for the preparation of emulsions, creams and ointments, although their use offers great advantages over vertical vessel mixers, such as a greater ratio of mantle surface to volume and thus better heat transfer; larger liquid surface and less liquid level (lower static pressure at the bottom and thus better degassing); lower overall height and therefore much easier installation in existing buildings; lateral opening and thus easier access to the process space; Possibility of two-sided storage of the agitator.
  • the object of the invention is therefore to improve a generic device to the extent that it is (also) for the processing of viscous emulsions such as creams, etc. suitable.
  • a device for mixing and homogenizing viscous media with a cylindrical or trough-shaped, horizontally arranged vessel to the longitudinal axis inside the boiler, a mixing element is rotatably guided, wherein the device is characterized in that under the boiler a Homogenizer is arranged, the inlet of which is connected to a bottom of the boiler and the outlet is connected via a Umpumptechnisch with a remote from the inlet point of the boiler, wherein the mixing member has a wiper member for stripping the cylindrical inner wall of the boiler.
  • the wiper member is designed to wipe off the substantially entire inner surface of the vessel, i. both the cylindrical surface and at least one of the frontal surfaces.
  • a plurality of scraper elements are offset in the circumferential direction and arranged overlapping one another in the axial direction.
  • the wiper member may comprise at least one hollow cylinder segment.
  • the mixing element is designed to generate a circulating flow within the boiler.
  • the mixing element can have at least one mixing spiral.
  • the mixing element is designed to generate an axial flow in the direction of or away from the homogenizer.
  • the mixing element has at least two coaxial mixing elements.
  • the mixing element can have two opposing mixing elements.
  • the mixing element can have two mixing elements, one of which can be arranged on an end-side side wall (cover) and another on an opposite end-side side wall (cover).
  • the mixing elements can be provided with independent drives.
  • the boiler is held tiltable about a horizontal axis.
  • the boiler is provided with an overhead inspection opening, which is closed with a removable lid.
  • the invention provides that the boiler has at least one openable frontal, pivotable about a vertical axis side wall.
  • the boiler is provided with a depression in the region of the homogenizer.
  • the homogenizer can be flanged directly to the boiler, such as with its housing, and without intermediate switching of a separate supply line.
  • cleaning nozzles are arranged on the mixing element.
  • Fig. 1 illustrates the basic structure of a device according to the invention, which has a horizontally disposed, cylindrical vessel 2 with a rotatable about a longitudinal axis 4 of the boiler, helical mixing element 6 and arranged below the boiler 8 homogenizer.
  • the mixing element 6 may have a continuous spiral helix or a plurality of helical elements 41 which each extend over an angular range of for example 240 ° and are arranged overlapping each other.
  • the cylindrical vessel 2 is closed at a first end with a fixedly connected to the cylindrical outer wall 10 cover 12, while closed on the opposite side by a pivotable about a vertical axis 14 and held on a hinge 15 lid 16 and after its opening in accessible to its full cross section is.
  • Fig. 10 shows a device according to the invention with closed and opened lid, which is provided with a sight glass 17.
  • a bearing 20 for the mixing member 6 and a drive 24 are arranged.
  • the homogenizer 8 is connected with its inlet 8a at a lowest point of the vessel 2, wherein for the purpose of favorable processability of relatively viscous media, an inlet 8a of the homogenizer with the boiler connecting inlet line is either omitted or kept very short, so that the product starting from the boiler by the shortest route into the homogenizer.
  • the homogenizer can be flanged with its housing directly to the boiler.
  • the homogenizer is arranged in an axial end position of the boiler 2, but may, depending on the configuration of the boiler and the mixing element or agitator, optionally be arranged in the middle. The positioning shown is particularly favorable, since with the lid 16 open easily inspection, maintenance, etc. of the homogenizer can be performed.
  • the boiler 2 rests on a relatively low frame 26 on the floor 28, so that easy access to all essential parts without ladders, scaffolding, etc. is given, regardless of the length of the boiler.
  • the boiler is double-walled in the region of its cylindrical central portion and the left cover 12, wherein an inner wall with 2a and an outer wall with 2b is designated.
  • the boiler is vacuum-proof and pressure-resistant within the operational requirements. After homogenization, evacuation must often degas, so that a void volume in an upper area of the boiler is appropriate.
  • a dome can be placed in a conventional manner.
  • the boiler can in principle be completely filled, an operation with a partial filling of less than 90% of the maximum filling is preferred, in particular a partial filling between 70% and 80% of the maximum filling.
  • the ratio of heat-transferring area to volume increases significantly due to geometrical conditions, especially for a horizontal kettle, due to the relatively slimmer configuration of the fill material relative to a comparable vertical kettle.
  • the homogenizing and cooling times are adjusted to the degree of filling.
  • the vessel is ideally cylindrical (cross-sectional shape "a"), but may also be designed as a trough (cross-sectional shape "b"), such as Fig. 2 shows.
  • the filling height should be chosen so that product wetting is present only in a heated or cooled and stripped area.
  • the boiler can be easily tilted or tilted.
  • a tiltability of up to 45 ° is favorable.
  • the emptying can be ensured via the homogenizer or laterally arranged bottom outlet.
  • FIG. 3 and 4 show different variants of the support and pivotal mounting of a tiltable about a horizontal axis 21 boiler.
  • a drive indicated at 23 serves to pivot the boiler.
  • the mixing element is wall-mounted and has scrapers. Basically, all known Mischorgangeometrien applicable, with an example of an article of M. Kraume "Mixing and Stirring", Wiley-VCH, 2003 , referenced.
  • Scraper elements are designated 44, wherein these are arranged offset axially and in the circumferential direction along the mixing element. Stripping elements are preferably also arranged in the lid areas.
  • a helical mixing element to which one or more stripping elements are attached.
  • the mixing device causes a direction-dependent product transport to one side of the boiler, whereby a Transport to the homogenizer or, if the direction of rotation changes, can be ensured.
  • mixing devices that cause a circulation of the product within the boiler. This can be done for example via an external 40a and an internal 40b helix or screw, wherein on Fig. 5 referenced. A change in the direction of rotation of the mixing element changes the flow direction of the product. Inner and outer helix 40a, b have opposite directions of action. This causes not only a circulation but also a mild shearing of the product and thus mixing between adjacent fluid layers.
  • FIG. 5 When turned counterclockwise, in Fig. 5 Seen from the left, the conveying effects and directions indicated by arrows are achieved.
  • FIG. 5 right illustrated schematic frontal plan view symbolizes the spatial arrangement of the mixing helixes, wherein - seen from the left to the left - an increasing degree of blackening means a decreasing distance of the respective point of the helix of the (left of the device standing) viewer. The same applies to the illustration after Fig. 10 ,
  • Another advantageous embodiment involves a coaxial agitator, i. an external mixing element and a lying on a separate shaft, coaxially arranged inner mixing element.
  • the mixing elements can be driven by independent drives and in the same or in opposite directions of rotation.
  • Fig. 6 shows a preferred variant in which an outer, relatively slow-running mixing element (anchor with mixing helix (s)) 36 is disposed on the fixed lid 12 and a central, relatively fast-running second mixing element 38 (mixing propeller with two or more wings) to the opening lid 16 is arranged. Both mixing elements are provided with their own, separately controllable drives 24a, 24b.
  • the homogenizer is located centrally or centrally below the vessel, and a directional mixing element such as a mixing helix is used, two helixes 40 conveying from both sides towards the center should be provided, such as Fig. 7 shows.
  • the support structure of the radially outwardly disposed mixing element also referred to as anchor or anchor basket, requires at least one arm, for example two or three arms.
  • Fig. 8 shows a perspective view of such an armature with three arms 42.
  • the boiler inner surface is indicated by circular contours. At one end (or both) of the anchor basket is stored in one or both lids of the boiler.
  • the required stripping elements are suitably designed so that they are easily replaceable.
  • it should additionally be shaped in such a way that they run idle in the vertical direction or the product runs off easily.
  • a preferred variant of a stripping element 44 shows Fig. 9 above in the form of a depending on the direction of rotation differently inclined hollow cylinder segment.
  • the stripping element 44 is preferably made of fluorinated plastic.
  • the outer surface is preferably not machined to obtain the natural smoothness of the extrusion process.
  • a variant 44a of a stripping element ( Fig. 9 , Middle and bottom) is the hollow cylinder segment with its axis 45 with respect to the bowl longitudinal axis 4 slightly inclined (angle ⁇ ), wherein longitudinal edges of the scraper are arcuately adapted to the boiler inner surface. In this way, the stripping elements support the directional effect of the mixing element.
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  • the sealing of the shaft of the mixing element as well as the sealing of the homogenizer shaft is in contact with the product.
  • the seal is designed differently, for example as a radial shaft seal, product-lubricated mechanical seal or double-acting mechanical seal with barrier medium.
  • the at least one shaft of the mixing device can be mounted on one or both sides.
  • a one-sided storage with bottom open basket (anchor) allows the use of additional stirrers from the other side and facilitates the design of the side cover.
  • Fig. 11 explains different ways of arranging a pumping line 46, which prevents that coming from the outlet 8b of the homogenizer coming homogenized product re-enters the homogenizer.
  • Possible end points of the pumped circulation line 46 are denoted by 48 to 56, wherein 48 denotes a short return near the homogenizer 8, 52 a long return near the homogenizer, 54 a short return on the opposite side of the homogenizer and 56 a long return on the opposite side of the homogenizer ,
  • a short recirculation occurs at low fill levels.
  • a short return such that it is centrally located in a lower region of the boiler.
  • the return can open tangentially, so that it supports the circulating flow.
  • the mixing device To achieve the most complete discharge or a small residual amount within the boiler, it is favorable in addition to the measures already mentioned (mixing element with conveying direction to the homogenizer, smooth scraper) when the mixing device has a relatively small surface area.
  • the mixing device itself can be provided with suitable scrapers and thereby be cleaned of product.
  • the cleaning takes place for example by arranged in the boiler shell nozzles that can be arranged extendable so as not to hinder the operation of the mixing element and the scraper during production.
  • nozzles 60 may be provided on or in the mixing device, such as Fig. 12 shows, so that an ideal approach of the cleaning liquid to all desired positions is possible.
  • the mixing element is at least partially designed as a hollow profile.
  • the supply takes place via a central shaft 22.
  • the nozzles can be extendable.
  • the entire arrangement is preferably regulated by a programmable logic controller.
  • Sensors for pressure, temperature, flow, pH, particle size and / or other product properties provide the required input signals.
  • Major advantages of the present invention are: good mixing; large heat transfer surface and short process times; low height (installation in low buildings possible); Elimination of elaborate Deckelhub Anlagenen (required for vertical boiler); easy access to the homogenizer for inspections; good degassing (large surface); no stage; easy product feeding and access on both sides resulting in great variability for the design of the mixing device.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)
  • Steroid Compounds (AREA)
  • Glass Compositions (AREA)
  • Paints Or Removers (AREA)

Claims (19)

  1. Dispositif de mélange et d'homogénéisation de fluides visqueux, avec un réservoir (2) disposé horizontalement, cylindrique ou ayant une forme résistant à la pression, autour de l'axe longitudinal (4) duquel, à l'intérieur du réservoir (2), est guidé à rotation un organe de mélange (6), dans lequel, sous le réservoir (2) est disposé un homogénéisateur (8), dont l'admission (8a) est reliée à une face inférieure du réservoir (2), caractérisé en ce que sont évacuation (8b) est reliée, par une conduite de repompage (46), à un point, éloigné de l'admission (8a) du réservoir (2), l'organe de mélange (6) présentant un organe racleur (44), pour racler la paroi intérieure cylindrique du réservoir (2).
  2. Dispositif selon la revendication 1, caractérisé en ce que l'organe racleur (44) est réalisé pour racler la totalité de la surface interne du réservoir (2),
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que plusieurs éléments racleurs (44) sont disposés, de façon décalée en direction périphérique et en se superposant les uns les autres en direction axiale.
  4. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'organe racleur présente au moins un segment de cylindre creux.
  5. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'organe racleur (44) présente au moins un élément racleur (44), incliné obliquement par rapport à l'axe longitudinal (4) du réservoir (2).
  6. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'organe de mélange (6) est réalisé pour produire un écoulement circulatoire à l'intérieur du réservoir (2).
  7. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'organe de mélange (6) présente au moins un enroulement de mélange (40).
  8. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'organe de mélange (6) est réalisé pour produire un écoulement axial dans le sens du rapprochement ou de l'éloignement vis-à-vis de l'homogénéisateur.
  9. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'organe de mélange (6) présente deux éléments de mélange (36, 38) coaxiaux.
  10. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'organe de mélange (6) présente deux éléments de mélange en sens inverse.
  11. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'organe de mélange (6) présente deux éléments de mélange, dont l'un est disposé sur une paroi latérale (12) frontale, et un autre est disposé sur une paroi latérale (16) frontale opposée.
  12. Dispositif selon l'une des revendications 9 à 11, caractérisé en ce que les éléments de mélange présentent au moins deux entrainement indépendants.
  13. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le réservoir (2) est maintenu de façon à pouvoir basculer autour d'un axe horizontal.
  14. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le réservoir est muni d'une ouverture d'inspection placée en partie supérieure, fermée avec un couvercle amovible.
  15. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le réservoir (2) présente au moins une paroi latérale (couvercle) 12, 16 ouvrante, disposée côté frontal, susceptible de pivoter autour d'un axe vertical.
  16. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le réservoir (2) est muni d'une rigidification, dans la zone de l'homogénéisateur (8).
  17. Dispositif selon l'une des revendications précédentes, caractérisé en ce que, dans sa zone cylindrique ou en forme d'auge, le réservoir (2) est totalement ou partiellement réalisé avec une paroi double,
  18. Dispositif selon la revendication 17, caractérisé en ce qu'un, ou les deux couvercles (12, 16) sont réalisés avec une paroi double.
  19. Dispositif selon l'une des revendications précédentes, caractérisé en ce que des buses de nettoyage (60) sont disposées sur, ou dans, l'organe de mélange (6).
EP06722713A 2005-04-12 2006-03-30 Dispositif de melange et d'homogeneisation de fluides visqueux Not-in-force EP1885482B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200520006133 DE202005006133U1 (de) 2005-04-12 2005-04-12 Vorrichtung zum Mischen und Homogenisieren viskoser Medien
PCT/DE2006/000561 WO2006108381A1 (fr) 2005-04-12 2006-03-30 Dispositif de melange et d'homogeneisation de fluides visqueux

Publications (2)

Publication Number Publication Date
EP1885482A1 EP1885482A1 (fr) 2008-02-13
EP1885482B1 true EP1885482B1 (fr) 2008-10-01

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EP06722713A Not-in-force EP1885482B1 (fr) 2005-04-12 2006-03-30 Dispositif de melange et d'homogeneisation de fluides visqueux

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EP (1) EP1885482B1 (fr)
AT (1) ATE409517T1 (fr)
DE (3) DE202005006133U1 (fr)
WO (1) WO2006108381A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006022660A1 (de) 2006-05-12 2007-11-15 Gebrüder Lödige Maschinenbau -Gesellschaft mit beschränkter Haftung Mischer mit Abstreifern
CN102489206A (zh) * 2011-11-14 2012-06-13 桂林电子科技大学 粉粒体垃圾搅拌机
CN105329677B (zh) * 2015-09-29 2018-03-09 湖南海尚环境生物科技股份有限公司 物料循环搅拌机构及其控制使用方法和无水型生态厕所
CN110736335A (zh) * 2019-10-21 2020-01-31 安徽金尚机械制造有限公司 悬浮炉进糠装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1184325B (de) * 1960-07-30 1964-12-31 Draiswerke Gmbh Mischmaschine
DE1276986B (de) * 1962-03-10 1968-09-05 Fritz Loedige Pflugscharaehnliches Mischwerkzeug
DE1432028A1 (de) * 1964-02-18 1968-10-31 Draiswerke Gmbh Verfahren zum Betrieb von Mischmaschinen sowie zugehoerige Mischmaschine
DE1782585C3 (de) * 1968-09-20 1982-04-15 Draiswerke Gmbh, 6800 Mannheim Mischmaschine
DE3728710C2 (de) * 1987-08-28 1997-08-21 Loedige Maschbau Gmbh Geb Mischer zum Mischen von Feststoffschüttungen
DE19602452A1 (de) * 1996-01-24 1997-08-07 Zettl Gmbh & Co F Verfahren zum Granulieren von Schlämmen
JP3209941B2 (ja) * 1997-04-28 2001-09-17 花王株式会社 混合方法および混合装置
IT1317180B1 (it) * 2000-04-06 2003-05-27 Egidio Pecis Miscelatore per la preparazione di mangimi e la miscelazione diformaggi pre-trinciati con mangimi vari e semi diversi per
US6648501B2 (en) * 2000-12-19 2003-11-18 Wenger Manufacturing, Inc. System for homogeneously mixing plural incoming product streams of different composition

Also Published As

Publication number Publication date
DE502006001697D1 (de) 2008-11-13
DE112006001559A5 (de) 2008-03-20
WO2006108381A8 (fr) 2008-01-03
ATE409517T1 (de) 2008-10-15
DE202005006133U1 (de) 2005-06-23
WO2006108381A1 (fr) 2006-10-19
EP1885482A1 (fr) 2008-02-13

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