EP0587714A1 - Dispositif de dispersion, suspension ou emulsion de gaz, liquides et/ou matieres solides coulantes. - Google Patents

Dispositif de dispersion, suspension ou emulsion de gaz, liquides et/ou matieres solides coulantes.

Info

Publication number
EP0587714A1
EP0587714A1 EP92912374A EP92912374A EP0587714A1 EP 0587714 A1 EP0587714 A1 EP 0587714A1 EP 92912374 A EP92912374 A EP 92912374A EP 92912374 A EP92912374 A EP 92912374A EP 0587714 A1 EP0587714 A1 EP 0587714A1
Authority
EP
European Patent Office
Prior art keywords
rotor
ring
dispersing
powder
wing
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
EP92912374A
Other languages
German (de)
English (en)
Other versions
EP0587714B1 (fr
Inventor
Hanspeter Seeger
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.)
Ystral Maschinenbau and Processtechnik GmbH
Ystral Maschinenbau & Pro GmbH
Original Assignee
Ystral Maschinenbau and Processtechnik GmbH
Ystral Maschinenbau & Pro 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 Ystral Maschinenbau and Processtechnik GmbH, Ystral Maschinenbau & Pro GmbH filed Critical Ystral Maschinenbau and Processtechnik GmbH
Publication of EP0587714A1 publication Critical patent/EP0587714A1/fr
Application granted granted Critical
Publication of EP0587714B1 publication Critical patent/EP0587714B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/56—Mixing liquids with solids by introducing solids in liquids, e.g. dispersing or dissolving
    • 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
    • B01F25/53—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle in which the mixture is discharged from and reintroduced into a receptacle through a recirculation tube, into which an additional component is introduced
    • 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
    • B01F25/60—Pump mixers, i.e. mixing within a pump
    • B01F25/64—Pump mixers, i.e. mixing within a pump of the centrifugal-pump type, i.e. turbo-mixers
    • B01F25/642—Pump mixers, i.e. mixing within a pump of the centrifugal-pump type, i.e. turbo-mixers consisting of a stator-rotor system with intermeshing teeth or cages
    • 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
    • B01F25/60—Pump mixers, i.e. mixing within a pump
    • B01F25/64—Pump mixers, i.e. mixing within a pump of the centrifugal-pump type, i.e. turbo-mixers
    • B01F25/643—Pump mixers, i.e. mixing within a pump of the centrifugal-pump type, i.e. turbo-mixers with axial access to the mixing device at both its sides
    • 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
    • B01F27/81—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow
    • B01F27/812—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow the stirrers co-operating with surrounding stators, or with intermeshing stators, e.g. comprising slits, orifices or screens
    • 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
    • B01F2025/91—Direction of flow or arrangement of feed and discharge openings
    • B01F2025/919—Direction of flow or arrangement of feed and discharge openings characterised by the disposition of the feed and discharge openings
    • B01F2025/9191—Direction of flow or arrangement of feed and discharge openings characterised by the disposition of the feed and discharge openings characterised by the arrangement of the feed openings for one or more flows, e.g. for the mainflow and the flow of an additional component
    • B01F2025/91913—Direction of flow or arrangement of feed and discharge openings characterised by the disposition of the feed and discharge openings characterised by the arrangement of the feed openings for one or more flows, e.g. for the mainflow and the flow of an additional component with feed openings facing each other, e.g. for creating counter flows, for creating a series of vortex flows

Definitions

  • the invention relates to a device according to the
  • Preamble of claim 1 In such a device, its function or effectiveness is in most cases determined by how it is suitable for the materials that are difficult to process. If the device is also able to process such substances, then it is also suitable in most cases for the treatment of easily processed substances.
  • powder is to be considered in the present case as a substance that is difficult to process.
  • blockages can be expected when the powder is conveyed through the device because it tends to form bridges, which in many cases is the cause of a blockage.
  • the risk of constipation is particularly high if powder is wetted with a liquid. This can be explained by the fact that the powder or partial quantities of the powder are only slightly moistened on the first wetting contact, after which the tendency to cake, to form bridges and to adhere to the walls of the device is particularly great.
  • Containers are immersed, or as devices with a closed working chamber through which the substance or substances to be processed are passed during operation.
  • DE-OS 27 02 183 shows a device in the form of an agitator, the substance to be processed being sucked in parallel to the axis of rotation of the rotor and being expelled radially by means of a dispersing device arranged downstream in the direction of flow in the form of shear rings.
  • a dispersing device arranged downstream in the direction of flow in the form of shear rings.
  • DE-OS 30 02 429 describes a device for dispersing gas, powder and fluids in the form of an agitator or
  • Jet mixer described, in which two separate supply lines for the substances to be incorporated coaxially through a jacket surrounding the rotor shaft extend into the area of the vane rotor, so that the substances can be fed separately from the material product in the agitator circulation in the area of the vane rotor .
  • US Pat. No. 3,194,540 describes a device for homogenizing a material with a plurality of rotating shear rings arranged in a housing coaxially with one another, the material to be processed being fed axially with respect to the rotor axis, being expelled radially through the shear rings and then is led out of the housing.
  • a device with two inlets on one side of the rotor has already been proposed for dispersing or emulsifying at least two media or substances which tend to change their state when they come into contact with one another, the substances also radially outward through a dispersing device with two shear rings rotating relative to one another are guided, however, up to the entry into the inner rotor shear rim, the media flow in separate channels, the channels being arranged alternately in the circumferential direction.
  • the known devices have the shortcoming in common that they are only insufficiently suitable for processing powders or possibly also granular substances due to the given complicated cable routing for the substances, as a result of which disturbances in the flow of material, blockages and loss of production are predetermined. In addition, the dispersion is insufficient.
  • the invention has for its object to design a device of the type mentioned that it is also suitable for processing powders or granular substances. This object is solved by the features of claim 1.
  • the device according to the invention is not only characterized by a simple and small construction, but also enables the feeding of two substances separately from one another directly into the dispersion area.
  • This has the advantage that the substances are brought together and in particular the wetting of powder or granular substances takes place only in the area in which the substances are mechanically acted upon and mixed with one another, optionally comminuted and finely distributed. A reaction of the substances can therefore only take place in the dispersion area, which is why the distribution of the substances into one another is initiated before they are subject to a change in state due to mutual contact.
  • Substances can thus be distributed into one another before these measures are significantly restricted and impeded due to the change in the state of the media.
  • substances which are difficult to process such as in particular powder
  • changes in the state of the powder which tend to become blocked due to wetting are harmless because the powder is already in the region in which it is mechanically loaded and flow disturbances and blockages cannot therefore occur.
  • the device according to the invention can be implemented as a continuously operating machine and is suitable
  • the device automatically sucks in the powder, e.g. out
  • Bags, big bags or silos are Bags, big bags or silos.
  • the invention comprises advantageous configurations for the respective media feed, in particular powder feed, so that trouble-free feed, in particular automatic feed of the powder from containers, is possible.
  • the media in the area of the rotor are exposed to radial acceleration, which enables the device to function without interference regardless of its position in space.
  • the device can thus be operated not only in a standing arrangement with a vertical rotor axis, but also in a lying arrangement with a horizontal rotor axis.
  • the device according to the invention is characterized in that two media streams are radially accelerated with a rotor and are initially conveyed separately from one another by centrifugal force, a vacuum (under pressure) being created in the center of the rotor in the region of each liquid stream, which is caused by the radial acceleration of the media becomes.
  • Figure 1 shows a device according to the invention with a standing arrangement in the front view.
  • Figure 2 shows the device in a side view from the right.
  • Fig. 4 shows the detail marked with X in Fig. 1
  • Fig. 5 shows the device in a modified configuration
  • Fig. 6 shows the detail marked X in Fig. 5 in a modified embodiment.
  • reference numerals 1 to 59 are listed with associated part designations with which a large number of the individual parts of the device 1
  • the device 60 comprises a support frame 61 with a bottom-side horizontal support frame 62, from which a vertical tenter frame or tension rails 63 extend upright, on which the actual device for dispersing, emulsifying and / or suspending is screwed as an assembly 61a in an upright arrangement and in a central position with respect to the support frame 61.
  • the unit 61a comprises an electric motor 42 with an upright axis of rotation, on the upper side of which housing an intermediate housing or bearing flange 1 and thereon a rotor housing 66 are flanged and screwed together.
  • the motor shaft is extended upwards by a shaft 2 which extends into the upper region of the rotor housing 66.
  • a rotor 8 is attached, which consists of a radial
  • the shaft 2 is coaxial in the rotor housing. 66 arranged, an annular space with the width a of several centimeters is provided between the inner wall 69 of the rotor housing 66 and the shaft 2.
  • a radial connecting piece 72 with a coupling part, in particular screw coupling part 73 is fastened in the rotor housing wall 71 to its free end, to which a feed line 74, indicated as indicated, for a first medium to be treated is attached , in particular liquid, can be connected.
  • the connection piece 72 forms one with the annular space
  • Feed channel 75 for the medium which extends in the direction of flow up to the rotor disk 67.
  • a pipe section 76 projecting upwards is arranged coaxially and is connected to an upper-side receiving funnel 77 for a second medium, in particular powder, shown in FIGS. 1 to 3.
  • the pipeline section 76 thus forms a second feed line 79, it being possible to connect a connecting piece with a coupling part of a coupling 81, in particular screw coupling part 81a, to further parts of the supply line 79.
  • the further feed line 79 is a hose 79a shown in FIG. 5, with which the second medium can be sucked in from bags, big bags or silos.
  • a line section with a manually operated shut-off valve 82 can be arranged, which is also releasably connected to the hose 79a by in particular a screw coupling 80.
  • the pipeline section 76 forms a second feed channel 83, which also opposes the first feed channel 75 as far as the rotor disk. 67 extends.
  • the shaft 2 essentially closes with the top of the rotor disk 67, a cap nut 20 protruding slightly upwards, so that also the second feed channel 83 ends in a ring shape in connection with the associated inner wall of the rotor housing 66.
  • a mixing chamber 7 is provided in the rotor housing 66, which is formed by an inner peripheral groove of essentially rectangular cross section.
  • the outer edge region of the rotor 8 is immersed in this annular mixing chamber 7.
  • the mixing chamber 7 is delimited axially by radial flat wall surfaces 84, 85 of the inner circumferential groove and radially by a cylindrical inner circumferential surface 86 of the rotor housing 66.
  • a stator is preferably in the form of a hollow cylinder as a sieve insert
  • Perforated ring or sleeve 10 is arranged, which starts from one, here from the upper, wall surface 84 and ends at a distance b from the lower wall surface 85.
  • the perforated sleeve 10 is fastened at its upper edge to a fastening ring 88 which is sunk in the wall surface 84 and is fastened from the outside by a fastening screw 57.
  • the holes 10a in the perforated sleeve 10 can on one
  • the rotor ring 68 is formed by one or preferably a plurality of vanes 89 distributed around the circumference in the form of flat webs, each arranged in the associated axial center plane of the rotor 8, with radial through openings 90 arranged therebetween. If there is one
  • Perforated ring 10 are provided on the outside thereof, preferably a plurality of outer rotor ring blades 89a and on the inside thereof at least one, preferably also a plurality of inner rotor ring blades 89b arranged on the circumference, the radial spacing c of which is larger, taking into account a play in motion, than the thickness of the perforated sleeve 10 so that the stationary perforated sleeve 10 with the outer ren and inner rotor ring blades 89a and 89b form an inner and an outer shear ring and thus form a dispersing device 91.
  • the inner rotor ring vanes 89b extend only on one side from the rotor disk 67, here downward in the direction of the first medium supply channel 75.
  • the at least one inner rotor ring wing 89b can extend to the other side surface of the rotor disk 67 if these one has a corresponding distance from the perforated sleeve 10.
  • the outer and inner rotor ring vanes 89a, 89b are connected at their lower ends by a rotor ring disk 92 which is rotatably arranged at a distance b between the perforated sleeve 10 and the wall surface 85 and which is axially offset with respect to the rotor disk 67 and has an axial distance therefrom.
  • the axial and radial dimensions of the rotor ring 68 are preferably dimensioned such that they are adapted to the axial width and the radial depth of the mixing chamber 7 taking into account a play of movement.
  • a thin cylindrical, upwardly projecting ring extension 93 can be arranged on the lower inner edge of the mixing chamber 7, which overlaps the inside of the rotor ring disk 92 with movement play, but at a distance in front of that corresponding to the axial width of the passage openings
  • Rotor disk 67 ends.
  • the mixing chamber 7 is followed by a product outlet, which is connected through a preferably secant connection piece 94
  • Hose 79a inserted into a powder supply and held.
  • the working mode is initiated by switching on the motor 42, which preferably rotates the rotor 8 at a high number of revolutions, preferably approximately 3000 revolutions per minute. Due to the rotation of the motor 8, a radial acceleration is exerted on both sides of the media present, which is forced by the at least one rotor ring inner wing 89b and rotor ring outer wing 89a. As a result, both media are drawn into the dispersion area, simultaneously dispersed, wetted and finely divided, radially accelerated and expelled. The dispersed product is thus driven out of the product outlet by the rotor rotation.
  • a sealing device generally designated 95, can be used which interacts in a known manner with a liquid barrier medium.
  • the device 60 in the embodiment according to FIG. 5 has a trolley 97 with three or four wheels 98 on, on which the unit is arranged lying.
  • the arrangement is preferably such that the connecting piece 72 is directed downwards, while the product outlet 11 is directed upwards.
  • the unit 1 a is preferably arranged on the carriage 97 in such a way that the rotor housing 66 projects laterally from the carriage 97 and the associated media inlet 72, 79 or product outlet 11 is freely accessible.
  • the second feed channel 83 preferably runs divergently, in particular with an inner cone surface 98, into the associated wall surface 84 of the mixing or dispersing chamber 7, as a result of which the material intake is improved, in particular for powders.
  • the holes 10a in the perforated sleeve 10 are formed by oblique slots, which preferably enclose an angle W of approximately 30 ° with the associated axial plane (oblique angle).
  • W preferably enclose an angle W of approximately 30 ° with the associated axial plane (oblique angle).
  • the slots are arranged obliquely in advance with respect to the direction of rotation of the rotor 8 on the powder side and in an oblique manner on the liquid side. This will force the powder flow.
  • the mixing chamber 7 is delimited axially by two flange pieces 66a, 66b and radially by an annular piece 66c, preferably of a U-shaped cross section.
  • the flange and ring pieces 66a to 66c have outer roof-shaped in their axial edge regions
  • V-shaped or trapezoidal clamping ring 99 is seated, which is stretched in the area of a dividing joint.
  • the flange and ring pieces 66a to 66c are held together axially.
  • the ring piece 66c is centered in the inner ring recesses 66d of the flange pieces 66a, 66b.

Landscapes

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

Abstract

Un dispositif de dispersion, d'émulsion ou de suspension de gaz, de liquides ou de matières granulées, notamment d'humidification et de dispersion de poudres dans des liquides, comprend un rotor (8) en forme de disque situé dans une chambre de dispersion (7), deux admissions de substances (72, 76) et une sortie de produit (11). Chaque admission (72, 76) de substances située des deux côtés du rotor (8) est pourvue d'une section axiale de canal (75, 83) et les deux courants de substances se rejoignent dans la zone marginale extérieure du disque rotatif (67), alors que la sortie de produit (11) est située au bord extérieur de la chambre d'humidification (7).
EP92912374A 1991-06-07 1992-06-09 Dispositif de dispersion, suspension ou emulsion de gaz, liquides et/ou matieres solides coulantes Expired - Lifetime EP0587714B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4118870 1991-06-07
DE4118870A DE4118870A1 (de) 1991-06-07 1991-06-07 Vorrichtung zum benetzen und dispergieren von pulvern in fluessigkeiten
PCT/EP1992/001284 WO1992021436A1 (fr) 1991-06-07 1992-06-09 Dispositif de dispersion, suspension ou emulsion de gaz, liquides et/ou matieres solides coulantes

Publications (2)

Publication Number Publication Date
EP0587714A1 true EP0587714A1 (fr) 1994-03-23
EP0587714B1 EP0587714B1 (fr) 1995-04-05

Family

ID=6433485

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92912374A Expired - Lifetime EP0587714B1 (fr) 1991-06-07 1992-06-09 Dispositif de dispersion, suspension ou emulsion de gaz, liquides et/ou matieres solides coulantes

Country Status (5)

Country Link
US (1) US5540499A (fr)
EP (1) EP0587714B1 (fr)
CA (1) CA2110508C (fr)
DE (2) DE4118870A1 (fr)
WO (1) WO1992021436A1 (fr)

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Also Published As

Publication number Publication date
DE4118870A1 (de) 1992-12-17
CA2110508A1 (fr) 1992-12-10
US5540499A (en) 1996-07-30
DE59201849D1 (de) 1995-05-11
EP0587714B1 (fr) 1995-04-05
CA2110508C (fr) 2003-08-12
WO1992021436A1 (fr) 1992-12-10

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