EP0487310B1 - Dispositif et procédé de mélange - Google Patents

Dispositif et procédé de mélange Download PDF

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Publication number
EP0487310B1
EP0487310B1 EP91310662A EP91310662A EP0487310B1 EP 0487310 B1 EP0487310 B1 EP 0487310B1 EP 91310662 A EP91310662 A EP 91310662A EP 91310662 A EP91310662 A EP 91310662A EP 0487310 B1 EP0487310 B1 EP 0487310B1
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EP
European Patent Office
Prior art keywords
mixing
blades
container
mixture
materials
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.)
Expired - Lifetime
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EP91310662A
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German (de)
English (en)
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EP0487310A1 (fr
Inventor
Takao Inoue
Yukihiro Omika
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Kajima Corp
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Kajima Corp
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Priority claimed from JP3236653A external-priority patent/JPH0794008B2/ja
Priority claimed from JP3236652A external-priority patent/JPH0741614B2/ja
Application filed by Kajima Corp filed Critical Kajima Corp
Publication of EP0487310A1 publication Critical patent/EP0487310A1/fr
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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
    • 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
    • B01F27/0724—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis directly mounted on the rotating axis

Definitions

  • This invention relates to a device and method for mixing solid and liquid substances by suitable mixing action, and more particularly to a mixing device for mixing various kinds of pulverulent materials such as cement with a liquid such as water to obtain a suitable intimate mixture in which the pulverulent materials are uniformly dispersed in the mixture by rotating paired mixing blades so as to cause collisions of the particles of the pulverulent materials.
  • the quality of a mixture of various pulverulent materials and a liquid such as water depends on whether or not the particles of the pulverulent materials are uniformly dispersed in the resultantly obtained mixture and mixed completely with the liquid without being left in the form of immiscible lumps with the liquid.
  • a liquid such as water
  • cement and water are first mixed to make cement paste, and thereafter, aggregate is added to and mixed with the cement paste thus made.
  • the pulverulent particles of raw materials to be mixed tend to remain in a resultantly obtained mixture such as cement paste in the form of immiscible lumps with water, which accommodate air between the pulverulent particles in such a state that the water brings about surface tension in the mixture. Therefore, fine air bubbles in the lumps of the pulverulent materials are held in the mixture by the liquid film crosslinking effect.
  • the pulverulent particles are electrostatically joined with one another, the coherence of the pulverulent particles joined electrostatically is weaker than that by the liquid film crosslinking effect.
  • the lumps of the pulverulent materials which is first brought about in the mixture cannot easily be broken merely by driving the screw used in the aforenoted conventional mixing device, because the fine air bubbles in the lumps of the pulverulent materials possibly serve as a cushion.
  • the lumps of the pulverulent materials could not be broken effectively by the prior art including the conventional mixing device as noted above.
  • the inventors of the present invention have carried mainly on various studies of an energy introducing method for effectively breaking and uniformly dispersing lumps of pulverulent particles in the mixture.
  • the finer the pulverulent particle to be mixed with a liquid having surface tension is, the larger the cohesion thereof becomes.
  • the pulverulent particles such as cement generally have a diameter of the order of about 10 ⁇ m to several ten ⁇ m, and such fine particles tend to gather and agglomerate to form a lump in a liquid. Therefore, by the conventional mixing device which intends to mechanically mix the pulverulent materials with a rotating blade or one set of blades in a mixer container, a kinetic energy sufficient to break the lumps of the pulverulent particles cannot be produced.
  • the pulverulent particles can be dispersed uniformly in a liquid by causing collision of the particles by utilization of the difference in inertial mass between the pulverulent particles, and therefore, it is desirable to cause the pulverulent particles to collide head-on with one another.
  • the present invention was made on the basis of the knowledge mentioned above. Accordingly it is an object of the present invention is to provide a mixing device and mixing method capable of mixing pulverulent materials such as cement with a liquid under the most suitable condition to produce a desired mixture in which the pulverulent materials are uniformly dispersed without being left in the form of immiscible lumps with the liquid.
  • Another object of the present invention is to provide a mixing device and mixing method capable of effectively mixing various pulverulent materials including aggregate with a liquid to produce a suitable mixture in which the pulverulent materials are uniformly dispersed, by causing the aggregate contained in the mixture to function as milling balls generally used in a ball mill, to thereby bring about collision of the aggregate with immiscible lumps of pulverulent particles with the liquid.
  • a mixing device is shown from European Patent Application No. 0305576 which utilises mixing blades arranged in axially-disposed pairs which have a greater separation between their leading edges than between their trailing edges.
  • a similar configuration for, however, mixing conical blades is disclosed in French Patent Application No. 2626787.
  • GB-A-1 187 632 discloses (cf. Fig. 4) a container as used in the present invention.
  • the invention is a mixing device comprising a mixing container (2) for materials to be mixed, which has a bottom and an annular side wall curving upwardly and outwardly from the bottom, a rotary shaft (17) rotatable at a high speed and disposed on the bottom of said container, and stirring means (10) formed of mixing blades extending radially outward from said rotary shaft, characterised in that said stirring means (10) has an upper unit of said mixing blades (11, 41, 51, 61, 71) and a lower unit of said mixing blades (12, 42, 52, 62, 72), which are arranged axisymmetically around said rotary shaft (17) in vertical spaced opposed relationship; each of said mixing blades in said upper unit is inclined downward from a front edge, relative to the direction of rotation of said rotary shaft, to a rear edge, relative to the direction of rotation of said rotary shaft; and each of said mixing blades in said lower unit is inclined upward from a front edge relative to the direction of rotation of said rotary shaft to a rear edge relative
  • said mixing container (2) has an inner wall surface shaped in an arc or parabola, in section, having gradually decreasing inner diameter toward the bottom (3) of said container, which inner wall surface (4) slants with slight curvature so as to permit the materials in said container to flow from the horizontal direction to the upward direction along said inner wall surface.
  • the present invention provides a method for mixing pulverulent materials with a liquid to produce a mixture, comprising placing the pulverulent materials with the liquid into a mixing container as defined in claim 1, rotating, at a high speed, at least one stirring means rotatably disposed one on another vertically opposite to each other on the bottom of the container.
  • a mixing container as defined in claim 1
  • at least one stirring means rotatably disposed one on another vertically opposite to each other on the bottom of the container.
  • the stirring means may be formed of mixing blades which are vertically opposed so that the distance between the opposite front edges of the blades is larger than that between the rear edges of the same relative to the direction of rotation.
  • the mixing blades are rotated to produce propulsive forces in opposite directions so that the materials such as pulverulent substances and liquids around the respective mixing blades are thrust against each other to come into collision with each other between the mixing blades.
  • the blades vertically opposite to each other of the mixing blades are so formed that the distance between their front edges is larger than that between their rear edges relative to the direction of rotation.
  • Fine lumps of the pulverulent materials which are possibly left in the mixture are circulated along with the mixture in the mixing container by the rotating blades and repeatedly stirred to be broken into fine particles miscible with the liquid.
  • Figure 1 is a schematic diagram showing a first embodiment of the mixing device according to this invention
  • Figure 2 is an explanatory diagram showing the principal portion of Figure 1
  • Figure 3 is an exploded perspective view showing the principal portion of Figure 1
  • Figure 4 and Figure 5 are schematic perspective and plan views showing the principal portion in explanation of the mixing principle of this invention
  • Figure 6 is a schematic side view of a second embodiment of this invention
  • Figure 7 is an exploded perspective view showing the principal portion of Figure 6
  • Figure 8 is an explanatory view of a third embodiment of this invention
  • Figure 9 is an explanatory view of a fourth embodiment of this invention
  • Figure 10 is a schematic diagram showing a fifth embodiment of the mixing device according to this invention
  • Figure 11 is an explanatory diagram showing the principal portion of Figure 10
  • Figure 12 is an exploded perspective view showing the principal portion of Figure 10
  • Figure 13 is a schematic perspective showing the principal portion in explanation of the mixing principle of the device of Figure 10
  • Figure 14 is a schematic explanatory diagram showing in, part, the rotary blades
  • the mixing device 1 shown in Figure 1 through Figure 3 as the first embodiment of this invention comprises a mixing container 2 for materials to be mixed, having a bottom 3 and stirring means 10.
  • the stirring means in this embodiment are each formed of mixing blade units 11 and 12 disposed one on another vertically opposite to each other at a distance, and auxiliary mixing blades 13 and 14 are vertically disposed respectively opposite to the respective mixing blades 11 and 12 at a distance in their coaxial state.
  • the mixing container 2 has an inner surface 4 shaped in an arc or parabola, in section, having gradually decreasing inner diameter toward the bottom 3. That is, the inner surface 4 of the container 2 slants with slight curvature so as to permit the materials to be mixed in the container to flow from the horizontal direction to in the upward direction along the slightly curved inner surface 4.
  • the inner surface 4 is inclined at about 25° to about 70°, preferably about 30° to about 55°.
  • the inner surface 4 leads to a circulating guide surface 4a inclined sharply.
  • reference numeral 5 denotes a lid for covering an inlet of the container, 6 a supporting frame for the container, 7 an outlet of the container from which a mixture resultantly obtained is discharged, 8 a rotary shaft portion for the mixing blades 11-14, and 9 a basal casing accommodating an electric motor (not shown) and other elements for driving the mixing blades at a high speed.
  • the mixing blades 11-14 have blades 11a-11d, 12a-12d, 13a-13d, and 14a-14d which are horizontally connected crosswise to one another and each shaped in a rectangle having a narrow width.
  • the mixing blades 11-14 are arranged in a four-layer state so as to vertically oppose the blades of one of the blades 11-14 to those of the other mixing blades as illustrated.
  • the opposed mixing blades 11 and 12 in the middle of the blades 11-14 are rotated in the same direction so as to cause the materials around the blades of the respective blades 11 and 12 to collide with opposite ones of the materials therebetween.
  • the blades 11a and 12a of the respective mixing blades 11 and 12 are opposed to each other so that the distance (intake side aperture) d1 between their front edges is larger than the distance (discharge side aperture) d2 between their rear edges relative to the direction of rotation indicated by the arrow R in Figure 4. That is, in a case of the blade formed of a thin plate having substantially equal thickness on the whole, the upper blade 11a is inclined downward from the front edge to the rear edge thereof relative to the direction of rotation, and the lower blade 12a is inclined upward. Namely, the upper and lower blades are inclined in the substantially opposite directions.
  • the blades 11a-11d and 12a-12d are inclined at a degree of about 30°, preferably, in the range of about 5° to about 15°.
  • the upper and lower auxiliary mixing blades 13 and 14 have blades 13a-13d and 14a-14d each inclined in the same direction as that in which the blades of the adjacent mixing blade 11 or 12 disposed in the middle are inclined. Namely, the blades 13a-13d of the upper auxiliary blade 13 are each inclined downward from the front edge to the rear edge thereof relative to the direction of rotation, and the blades 14a-14d of the lower auxiliary blade 14 are each inclined upward from the front edge to the rear edge.
  • the blades 13a-13d and 14a-14d are inclined at a degree of about 30°, preferably, in the range of about 5° to about 15°, in the same manner as the middle mixing blades 11 and 12.
  • the mixing blades 11-14 each may be formed by radially extending the blades from a hub 16 fitted to a rotary shaft 17, as one example.
  • each mixing blade may be engaged with the rotary shaft 17 by means of a key groove 18 and a key 19.
  • a gap adjusting member 20 shaped in a ring having the same diameter as the hub 16.
  • a plurality of gap adjusting members different in height may be prepared so that the distance between the mixing blades 11 and 12 can be selectively changed in accordance with the specific gravity and viscosity of the mixture to be dealt with by this mixing device, the rotational speed of the mixing blades and other possible factors.
  • the mixture in the container can properly flow and be sufficiently mixed.
  • the mixture parts around the blades 11a and 12a are effectively propelled by the rotating blades and collide with each other in the region A1 and A2 behind the blades relative to the direction of rotation.
  • the mixing blades 11-14 and the gap adjusting member 20 are fixed onto the rotary shaft 17 by screwing as shown in Figure 3. That is, the rotary shaft 17 is formed with a screw hole 22, and a fixing member 21 having a screw 23 and a nut 24 is used. By tightening up the screw 23 in the screw hole 22, the mixing blades and gap adjusting member can be fixed.
  • the mixing blades 11-14 Upon pouring the liquid such as water into the mixing container 2, the mixing blades 11-14 are driven to rotate the blades 11a-11d, 12a-12d, 13a-13d and 14a-14d at a high speed so as to bring about a strong current of water.
  • the rotating blades 11a-11d and 12a-12d the upward and downward currents (f1) of water occur, and then, collide with each other at the regions A1 and A2. Since the intake side distance d1 is larger than the discharge side distance d2, the water flowing into between the blades 11a and 12a through the intake side aperture d1 is accelerated to be discharged backward through the discharge side aperture d2 at a high speed.
  • pulverulent materials such as cement and aggregate are added to the water in the mixing container 2. Since the fine particles of the pulverulent materials, if agglomerating densely, are immiscible with water, the pulverulent materials tend to remain in the form of numerous lumps in a resultantly obtained mixture containing the water. However, the mixture including the lumps of the pulverulent materials are sufficiently stirred by the rotating blades. Moreover, by rotating the mixing blades at a high speed, the parts of the mixture around the upper and lower mixing blades 11 and 12 are thrust downward and upward and collide intensely with each other at the regions A1 and A2 to break the lumps of the pulverulent materials into fine particles miscible with water. The fine particles of the pulverulent materials are consequently dispersed uniformly in the mixture.
  • the collisions of the lumps of the pulverulent materials are first caused in the region A1 behind the rotating blades 11a-11d and 12a-12d and further developed to the region A2 as shown in Figures 4 and 5.
  • the lumps of the pulverulent materials would be completely broken.
  • the pulverulent materials reach the region A4 separated from the inner wall surface 4 of the container 2 while being dispersed in the mixture and split in two upward and downward along the inner wall surface 4 to be circulated by convection.
  • the parts of the mixture around the blades 13a-13d and 14a-14d of the upper and lower auxiliary mixing blades 13 and 14 are propelled by the rotating blades 13a-13d and 14a-14d toward the region A2 or A4 via the region A3 to form currents f2.
  • the currents f2 of the mixture also contribute toward breaking the lumps of the pulverulent materials in the mixture.
  • the mixing blades are rotated at such a rate to acquire a sufficient difference in inertial mass between the pulverulent particles contained in the mixture.
  • This mixing device has a spiral blade 30 for promoting circulation of the mixture in the container 2 and mixing blades 11, 12, 13 and 14 similarly to the foregoing embodiment.
  • the spiral blade 30 is formed on the circumferential surface of a fixing member 31 for fixing the mixing blades 11-14 onto the rotary shaft 17.
  • the elements indicated by like reference numerals with respect to those of the first embodiment have analogous structures and functions to those of the first embodiment and will not be described in detail again.
  • This mixing device having the spiral blade 30 enables even pulverulent materials having high viscosity such as cement mortar to be effectively circulated and mixed in the container.
  • Figure 8 illustrates the third embodiment having a modified blade structure.
  • the curved blades 40, 41 are effective particularly for pulverulent materials of fine or light particles. To the curved blades 40, 41 there may be exerted vibration to promote mixing of the pulverulent materials in the container.
  • each mixing blade 42 is provided with an expansion portion 43 extending backward from the rear edge of the blade relative to the direction of rotation.
  • This mixing blade 42 can possibly produce a more strong current of pulverulent materials in the container.
  • One mixing blade has the plural blades 42 as indicated by the chain line in Figure 9.
  • the number of the blades 42 may be arbitrarily decided, e.g. three, four, five or more.
  • the stirring means 51 in this embodiment is formed of screw blades 51 and 52, which are each fixed on a hub 55 or 56 so as to be inclined spirally round the corresponding hub.
  • Each screw blade 51, 52 assumes a sector shape as viewed from above having the central angle of about 30° to about 270°.
  • the central angle of the screw blade may be determined in accordance with the viscosity and specific gravity of the mixing materials to be dealt with. When the central angle is less than 30°, sufficient propulsive force would not be obtained. When the central angle is larger than 270°, it becomes difficult to introduce the mixing materials into between the screw blades. In a case of dealing with mortar, it is preferable to determine the central angle of the screw blade to about 60° to about 120°.
  • the screw blades 51 and 52 are used in pairs so that each pair of the blades are opposite to each other with a hub 55 or 56 between them.
  • the paired screw blades 51, 52 are vertically superposed one on another with and rotated to cause collision of propulsive currents of the mixture in the space between the rotating blades.
  • Each pair of the opposed blades have front edges separated widely relative to the direction of rotation to form a wide intake aperture d1 and rear edges separated narrowly to form a narrow discharge aperture d2.
  • a high pressure current ⁇ of the mixture is discharged from the discharge aperture d2 formed between the screw blades.
  • the upper screw blade 51 is spirally inclined downward from the front edge to the rear edge thereof relative to the direction of rotation, oppositely, the lower screw blade 52 is spirally inclined upward.
  • the upper and lower screw blades are inclined in the substantially opposite directions as opposed to each other in action.
  • the angle at which the screw blades 51 and 52 are inclined may be at least about 3° at which the current of the mixture can be changed in direction.
  • the screw blades may be inclined at about 40° or less so as not to intercept the flowing of the mixture between the screw blades.
  • the inclination of the screw blade may preferably be determined in the range of about 5° to about 15° in the case of mixing mortar.
  • the screw blades 51, 52 may be inclined in the radial direction so that the space between the opposite screw blades becomes narrower from their inner circumferential ends connected to the hubs 55, 56 toward the outer circumferential edges thereof so as to prevent the mixture flowing between the screw blades from escaping sideward. It is desirable to form opposite protrusions 54 on the outer circumferential edge portion as shown in Figure 14 in order to heighten the effect of preventing the sideward escaping of the mixture between the screw blades.
  • the screw blades 51, 52 each extend radially outward from the hub 55 or 56 fitted to a rotary shaft 57.
  • each screw blade may be engaged with the rotary shaft 57 by means of a key groove 58 and a key 59.
  • a gap adjusting member 20 shaped in a ring having the same diameter as the hubs 55 and 56.
  • a plurality of gap adjusting members different in height (h) may be prepared so that the distance between the screw blades 51 and 52 can be selectively changed in accordance with the specific gravity and viscosity of the mixture to be dealt with by this mixing device, the rotational speed of the screw blades and other possible factors.
  • the height (h) of the gap adjusting member 20 By adjusting the height (h) of the gap adjusting member 20, the mixture in the container can properly flow and be sufficiently mixed.
  • the mixture parts around the screw blades 51 and 52 are effectively propelled by the rotating blades and collide with each other in the region behind the blades relative to the direction of rotation.
  • This mixing device may be provided with a circulating blade 30 for promoting circulation of the mixture in the container in consideration with viscosity of the mixture to be dealt with.
  • the circulating blade 30 is equivalent to that in the second embodiment shown in Figure 15.
  • the screw blades 51, 52 Upon pouring a liquid such as water into the mixing container 2, the screw blades 51, 52 are rotated at high speed so as to bring about a strong current of water.
  • the upward and downward propulsive currents of water occur between the blades 51A and 52A and between the blades 51B and 52B.
  • the currents of water occurring around the blades 51A and 51B are directed downward at an angle according to the inclination of the screw blades 51A and 51B, and those around the blades 52A and 52B are directed upward at an angle according to the inclination of the screw blades 52A and 52B. Since the intake aperture d1 between the front edges of the blades 51 and 52 are wider than the discharge aperture d2 between the rear edges of the same, the water flowing between the blades is discharged therefrom with increasing speed.
  • pulverulent materials such as AE agents and cement are added to the water in the mixing container 2.
  • the pulverulent materials tend to gather in the water to form lumps of pulverulent particles (Q) which become immiscible with water.
  • fine aggregate such as sand is added.
  • fine aggregate such as sand is added.
  • the aggregate particle is as small as about 0.1 mm to about 2 mm in diameter, it is caused to collide with the lumps of pulverulent particles by the rotating screw blades 51, 52, thereby to break the lumps of pulverulent particles (Q).
  • Such collision of the aggregate particles with the lumps of pulverulent particles occurs not only in the region between the blades but also at the regions around and behind the screw blades relative to the direction of rotation, involving the so-called ball mill effect brought about by the aggregate particles agitated by the rotating screw blades with heavy pressure.
  • the high pressure produced between the rotating screw blades can be determined to a desired value by adjusting the height (h) of the gap adjusting member 20.
  • the pulverulent particles thus dispersed in the mixture in the space between the screw blades are discharged with increasing speed from the discharge aperture d2 as if it passes through an orifice, and then, horizontally move straight backward as indicated by the imaginary arrows in Figure 15.
  • the fine aggregate particles having high inertia rush into the lumps of pulverulent particles (Q) staying statically at the region around the inner wall surface 4 of the mixing container 2, which is indicated by two-dot chain lines in the drawing.
  • the lumps of pulverulent particles in the mixture are effectively broken by the aggregate particles serving as an agitator like milling balls in a ball mill and dispersed uniformly in the mixture.
  • the pulverulent particles thus dispersed go away from the discharge aperture d2 with the mixture and advance upward and downward along the inner wall surface 4 of the container without sticking to the wall surface of the container. Then, the mixture is circulated by convection caused by rotating the screw blades in the mixing container. Since the container 2 has a substantially parabolic configuration, the mixture which is discharged horizontally backward from the discharge aperture d2 mostly advances upward along the inner wall surface 4 of the container. The mixture moved upward is again introduced into between the screw blades by the rotating blades 51, 52 and the circulating blades 30. This circulation of the mixture is repeated.
  • the sixth embodiment of the mixing device of this invention is shown in Figure 16 and Figure 17.
  • This mixing device is provided with screw blades 61 and 62 which define a space therebetween having a height equal in section in the horizontal direction, but has no circulating blade.
  • high speed collision of the mixture occurs around the rear edge portions of the screw blades to make a current of the mixture of high pressure, and lumps of pulverulent particles which are inevitably formed by initially mixing the pulverulent particles with water are effectively broken and uniformly dispersed in the form of fine particles in the mixture by the ball mill effect of the aggregate particles contained in the mixture which are agitated by the rotating screw blades 61, 62 at high speed.
  • the mixing device of this embodiment is fit particularly for mixing pulverulent materials having low viscosity.
  • FIG 18 shows the seventh embodiment of this invention.
  • the mixing device of this embodiment has screw blades 71 and 72 which are curved in the radial direction in such a state that their outer circumferential edges are close to each other.
  • the front edge of each screw blade has the width (r) smaller than the width (r+n) of the rear edge thereof.
  • the present invention can be adapted for mixing various pulverulent materials regardless of the size of the particle and the viscosity of the mixture by arbitrarily determining the rotational speed and shape of the blades and the shape of the container in compliance with numerous uses.
  • the mixing device of the present invention can be applied practically in its modified form to various fields of foods, medicines, metals, ceramics, plastics, livestock feed and so on.
  • various sorts of pulverulent materials such as cement can be effectively mixed with a liquid under the most suitable condition to produce a desirable mixture in which the pulverulent materials are uniformly dispersed without being left in the form of immiscible lumps with the liquid which are inevitably formed in the mixture of the pulverulent materials.
  • the aggregate contained in the mixture brings about the ball mill effect by rotating the screw blades so as to collision of the aggregate particles with immiscible lumps of the pulverulent materials with water inevitably formed in the mixture. Therefore, the mixture of high quality in which the pulverulent materials are uniformly dispersed can be obtained.

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  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Claims (10)

  1. Dispositif de mélange comprenant un récipient de mélange (2) pour des matériaux à mélanger, qui a un fond et une paroi latérale annulaire s'incurvant vers l'intérieur et vers l'extérieur à partir du fond, un arbre rotatif (17) pouvant tourner à grande vitesse et disposé au fond dudit récipient, et des moyens d'agitation (10) formés de pales de mélange s'étendant radialement vers l'extérieur depuis ledit arbre rotatif,
       caractérisé en ce que lesdits moyens d'agitation (10) ont une unité supérieure desdites pales de mélange (11, 41, 51, 61, 71) et une unité inférieure desdites pales de mélange (12, 42, 52, 62, 72), qui sont agencées de manière axisymétrique autour dudit arbre rotatif (17) en relation opposée et espacées verticalement ; chacune desdites pales de mélange dans ladite unité supérieure est inclinée vers le bas depuis un bord avant, par rapport à la direction de rotation dudit arbre rotatif, jusqu'à un bord arrière, par rapport à la direction de rotation dudit arbre rotatif ; et chacune desdites pales de mélange dans ladite unité inférieure est inclinée vers le haut à partir d'un bord avant par rapport à la direction de rotation dudit arbre rotatif jusqu'à un bord arrière par rapport à la direction de rotation dudit arbre rotatif, moyennant quoi les matériaux qui sont mélangés dans ledit récipient sont guidés entre lesdits bords avant desdites pales supérieures et inférieures et ensuite le long desdites pales supérieures et inférieures et entre lesdits bords arrière desdites pâles supérieures et inférieures afin qu'ils soient mis en circulation vers l'arrière et radialement vers l'extérieur desdites pales afin d'entrer en collision les uns avec les autres à l'arrière desdites pales et dans ledit espace s'étendant vers le haut et vers l'extérieur lorsque lesdites unités de pales supérieures et inférieures tournent dans ladite direction de rotation et les matériaux mélangés sont ensuite remis en circulation le long de la paroi latérale annulaire jusqu'auxdites unités de pales de mélange supérieures et inférieures,
       et caractérisé en outre en ce que ledit récipient de mélange (2) a une surface de paroi intérieure en forme d'arc ou de parabole, en coupe, ayant un diamètre diminuant progressivement vers le fond (3) dudit récipient, laquelle surface de paroi intérieure (4) est inclinée avec une légère courbure afin de permettre aux matériaux dans ledit récipient de s'écouler de la direction horizontale à la direction verticale le long de ladite surface de paroi intérieure.
  2. Dispositif de mélange selon la revendication 1, dans lequel lesdites pales de mélange (11, 12, 40, 41, 42) sont chacune formée d'une plaque mince ayant une épaisseur sensiblement égale, ladite pale supérieure étant inclinée vers le bas de son bord avant à son bord arrière par rapport à la direction de rotation, et la pale inférieure étant inclinée vers le haut.
  3. Dispositif de mélange selon la revendication 1 ou la revendication 2, comprenant en outre des pales de mélange auxiliaires (12, 13) disposées verticalement coaxialement à l'opposé desdites pales de mélange (11, 12, 40, 41, 42) à une certaine distance, respectivement.
  4. Dispositif de mélange selon la revendication 1, dans lequel lesdites pales de mélange (51, 52, 61, 62, 71, 72) sont chacune formées en forme de spirale et disposées les unes sur les autres verticalement à l'opposé les unes des autres au fond (3) dudit récipient de mélange (2), lesdites pales formant vis tournant à grande vitesse pour entraîner les matériaux du mélange à s'écouler rapidement entre les pales formant vis et utiliser l'agrégat contenu dans les matériaux du mélange en tant qu'agitateur de mélange.
  5. Dispositif de mélange selon l'une quelconque des revendications 1 à 4, comprenant en outre un élément d'ajustement d'espace (20) intercalé entre lesdites pales de mélange (11, 12, 40, 41, 42, 51, 52, 61, 62, 71, 72).
  6. Dispositif de mélange selon les revendications et des revendications 1 à 5, comprenant en outre une pale en spirale (30) pour faire circuler le mélange dans ledit récipient (2), ladite pale en spirale étant disposée sur lesdites pales de mélange (11, 12, 40, 41, 42, 51, 52, 61, 62, 71, 72).
  7. Dispositif de mélange selon l'une quelconque des revendications précédentes, dans lequel lesdites pales de mélange (11, 12, 40, 41, 42, 51, 52, 61, 62, 71, 72) prennent chacune une forme de secteur comme on le voit à partir de ce qui est décrit ci-dessus, ayant un angle central d'environ 30° a environ 270°.
  8. Dispositif de mélange selon l'une quelconque des revendications précédentes, dans lequel lesdites pales de mélange (11, 12, 40, 41, 42, 51, 52, 61, 62, 71, 72) prennent chacune une forme de secteur comme on le voit à partir de ce qui est décrit ci-dessus, ayant un angle central d'environ 60° à environ 120°.
  9. Procédé pour mélanger des matériaux pulvérulents avec un liquide pour produire un mélange, comprenant le placement des matériaux pulvérulents avec le liquide dans un dispositif de mélange selon la revendication 1, la rotation, à grande vitesse, des pales de mélange (11, 12, 40, 41, 42, 51, 52, 61, 62, 71, 72) radialement s'étendant vers l'extérieur, lesquelles pales de mélange sont disposées, de manière à pouvoir tourner, verticalement à l'opposé les unes des autres au fond (3) dudit récipient (2), ledit mélange autour des pales de mélange respectives entrant en collision du fait de la rotation à grande vitesse desdites pales de mélange.
  10. Procédé de mélange selon la revendication 9, dans lequel lesdits matériaux pulvérulents sont dispersés dans le mélange dans une région (A4), séparée de la surface de paroi intérieure (4) dudit récipient (2), et fendus en deux vers le haut et vers le bas le long de ladite surface de paroi intérieure afin d'être mise en circulation par convection.
EP91310662A 1990-11-21 1991-11-19 Dispositif et procédé de mélange Expired - Lifetime EP0487310B1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP31700590 1990-11-21
JP31700490 1990-11-21
JP317005/90 1990-11-21
JP317004/90 1990-11-21
JP3236653A JPH0794008B2 (ja) 1990-11-21 1991-09-17 混練装置及び混練方法
JP236652/91 1991-09-17
JP236653/91 1991-09-17
JP3236652A JPH0741614B2 (ja) 1990-11-21 1991-09-17 混練装置及び混練方法

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EP0487310A1 EP0487310A1 (fr) 1992-05-27
EP0487310B1 true EP0487310B1 (fr) 1997-01-29

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CN113416606B (zh) * 2021-05-12 2023-03-28 太樾中医药研究院(山东)有限公司 一种基于无损筛分的沉香提取物制备装置
CN113173667B (zh) * 2021-06-01 2022-12-06 中国海洋大学 海水淡化水的可补料型矿化系统
CN114227974B (zh) * 2021-12-17 2023-01-20 沭阳林冉塑业有限公司 一种环保型塑料加工搅拌装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT265214B (de) * 1964-12-29 1968-10-10 Erich Karl Todtenhaupt Vorrichtung zur Herstellung gleichmäßiger Dispersionen
AT265991B (de) * 1966-06-03 1968-10-25 Schauberger Biotechnik Ag Verfahren und Vorrichtung zur Herstellung von Gemischen, Lösungen, Emulsionen, Suspensionen u.dgl. sowie zur biologischen Reinigung von freien Gewässern
US3734469A (en) * 1970-12-31 1973-05-22 Exxon Research Engineering Co Reactor vessel and up-down mixer
ATE71560T1 (de) * 1987-09-03 1992-02-15 Bauko Baukooperation Gmbh Ruehrwerkzeug fuer eine industrielle misch- oder ruehrmaschine.
CH675215A5 (fr) * 1988-02-08 1990-09-14 Kurt Walter Wyss

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DE69124475D1 (de) 1997-03-13
DE69124475T2 (de) 1997-09-11
EP0487310A1 (fr) 1992-05-27

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