WO2001068232A1 - Secheur a tambour centrifuge et procede de traitement de poudre utilisant ce secheur - Google Patents
Secheur a tambour centrifuge et procede de traitement de poudre utilisant ce secheur Download PDFInfo
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- WO2001068232A1 WO2001068232A1 PCT/JP2000/008568 JP0008568W WO0168232A1 WO 2001068232 A1 WO2001068232 A1 WO 2001068232A1 JP 0008568 W JP0008568 W JP 0008568W WO 0168232 A1 WO0168232 A1 WO 0168232A1
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- centrifugal
- powder
- air supply
- rotating plate
- granular material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/16—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/14—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in rotating dishes or pans
Definitions
- the present invention relates to processing techniques such as granulation and coating of powders and granules, and in particular, to enhance the function of imparting a rolling action so that irregular shaped fine powders, which were conventionally difficult to produce, can be granulated with high yield.
- the present invention relates to a technology that is effective when granulating spherical particles such as pharmaceuticals and foodstuffs using a centrifugal tumbling granulator.
- powder granulators including rolling granulation, stirring granulation, extrusion granulation, crushing granulation, and fluidized bed granulation.
- Granulation is performed by the method described in (1).
- the rolling granulation method in which the powder is tumbled and granulated, is most suitable for obtaining spherical or nearly spherical granules.
- the equipment is roughly classified into the following two types. That is, a type in which a container body such as a drum type, an inclined pan type, and an inclined conical type is rotated is described in, for example, Japanese Patent Publication No. Sho 46-10878 â and Japanese Patent Publication No. Sho 46-22554. As in the case of a device, there is a type in which a rotating dish is arranged at the bottom of a cylindrical container, and the granular material is tumbled thereon.
- Rotating containers are mainly used for granulation of ores and fertilizers, where relatively large particles with a wide particle size distribution are produced.
- the one using a rotating plate is also called a centrifugal rolling granulator (hereinafter abbreviated as CF device), and performs spherical granulation by applying centrifugal force to the particles by rotating the rotating plate.
- CF device centrifugal rolling granulator
- this type of apparatus can obtain small granules having a narrow particle size distribution, and is generally used in the fields of pharmaceuticals and foods.
- a CF device composed of a combination of a cylindrical container and a rotating plate
- an annular narrow slit is formed between the inner wall of the cylindrical container and the outer edge of the rotating plate.
- the slit is formed narrow to prevent particles in the container from falling from the rotating dish,
- the slit can be supplied with air from the bottom up.
- the CF device rotates the rotating plate while supplying air to the slits, thereby rolling the particles on the rotating plate using centrifugal force to perform spherical granulation.
- the width of the slit formed around the rotating plate is narrow, the flow rate of air (slit air) passing through the slit is small, and it hardly contributes to drying of the generated particles.
- the CF device itself has a poor drying ability, and the generated spherical particles are transferred to another drying device and dried.
- the produced particles are taken out of the CF device and then dried separately by a fluidized bed device to produce a product. Therefore, although good spherical particles can be obtained, there is a problem in productivity, and improvement thereof has been desired.
- air can be supplied from the ventilation section or the like to dry the granulated material in parallel with the granulation or after the granulation is completed. Therefore, there is no need to transfer the product to another drying device for drying, and it is possible to improve productivity accordingly.
- these devices can further form a fluidized bed in the vessel by increasing the amount of air or slit air from the ventilation section, which allows various types of particles, from heavy spherical particles to amorphous light particles. Can be granulated.
- the above-mentioned apparatus can also be used for coating particles, and is widely used as a multifunctional apparatus capable of performing various kinds of granulation coating processes.
- the centrifugal tumbling granulator is considered to be suitable for the production of such granulated materials.However, if it is desired to granulate fine powder, especially irregular shaped fine powder, the conventional centrifugal tumbling granulator can be used. The present inventors have found that, because of insufficient rolling operation, good granulation cannot be performed, and only particles having a wide particle size distribution can be obtained.
- the shape of the centrifugal tumbling granulator has various modifications other than the commercial product illustrated in the aforementioned âMonthly Pharmaceutical Affairsâ.
- the above-mentioned Japanese Patent Publication No. 46-22544 and Japanese Patent Publication No. 46-108788 disclose a curved rotating plate having a diameter smaller than the maximum diameter portion of the side wall. Is disclosed.
- Japanese Patent Application Laid-Open Publication No. Hei 7-23249 discloses an apparatus having a curved rotating plate having a diameter substantially equal to the diameter of a cylindrical side wall.
- Japanese Patent Application Laid-Open No. 10-128097 discloses a device having a rotating dish whose outer peripheral portion is inclined downward toward the center.
- Japanese Patent Publication No. 46-10878 an apparatus having a spherical or ellipsoidal curved surface is disclosed in Japanese Patent Publication No. 46-10878, and a cylindrical top is disclosed in Japanese Patent Publication No. 46-22554.
- Each of the devices has a curved lower surface and a side wall that smoothly connects to a rotating plate.
- Japanese Patent Publication No. 54-992 discloses both of them.
- Mr. Funakoshi's thesis includes a device with a side wall having a hemispherical curved surface that is substantially inwardly inclined, and Japanese Patent Publication No. 1-1245332 discloses two mounting cones at the bottom.
- a device having an abacus-like side wall connected in the opposite direction is disclosed.
- the inwardly sloped side wall shown in the above thesis attenuates the rotational motion of the particle group. Then, it is considered to have an action of collapsing in the direction of the center of the tank, and the devices having similar shapes described in each of the above publications are also considered to have the same action.
- the present inventors have confirmed that even these devices are not sufficient for the rolling operation of amorphous fine powder.
- Japanese Patent Publication No. Sho 46-10887 and Japanese Patent Publication Sho 54-99 No. 2 discloses that a screw or an auxiliary plate is attached to a raised portion in the center of a side wall or a rotating plate, or a lifting wing is attached to the raised portion or the side wall. These are all considered to improve the swirling motion and the spiral circulation motion of a granular material such as a tablet.
- a large granular material is not suitable for an amorphous fine powder. In contrast, no effect was observed.
- the conventional centrifugal tumbling granulator could not produce fine granulated particles with high yield by granulating amorphous fine powder. Therefore, in order to produce such a granulated product, a granulated product having a wide particle size distribution has to be sieved to obtain particles in a desired particle size range, and the production situation is extremely inefficient. For this reason, the production cost was high and the product was not practical.
- the physical properties of the granulated material are not improved because the particles are subjected to buoyancy by the air passing through the ventilation part and the particles are not subjected to sufficient rolling operation and compression effect. Is done.
- the amount of circulating air is reduced in order to avoid this, it is not possible to prevent the powder and granules from falling from the ventilation section, etc., and the drying capacity is reduced. Therefore, it is necessary to secure a certain amount of air flow, and the physical properties of the granulated material are inevitably reduced as compared with a CF device having no drying function.
- the obtained granules have good physical properties, they do not have a drying function, and as described above, it takes time to transfer to another drying device, and the problem of productivity cannot be solved.
- Fig. 5 of JP-B-46-108788, Fig. 2 and Fig. 3 of JP-B-46-224544 show the centrifugal rolling granulator.
- Devices that have an air inlet in the upper space have been proposed.However, even if an air inlet is provided at a position distant from the rotating plate as in these devices, it hardly contributes to drying of the granulated material. To be put to practical use Not in.
- An object of the present invention is to provide an irregular shaped fine powder with sufficient rolling operation so that an irregular shaped fine powder can be uniformly granulated in a centrifugal rolling granulator.
- An object of the present invention is to provide a granulating apparatus capable of efficiently producing spherical particles having a small particle size, a narrow particle size distribution, and a high sphericity in a single device.
- the centrifugal tumbling granulator of the present invention solves the above-mentioned problems, and at least a side wall in which a horizontal cross section of a powder contact portion with a granular material is formed in a circular shape;
- a rotating plate that is provided through a gap that allows gas to flow upward from below, and that is rotated in the horizontal direction by a rotary drive unit; and
- Inward guiding means for guiding the granules to the inside of the powder contacting part, and a portion below the powder guiding part from the position where the inner guiding means is formed is formed substantially in a cylindrical shape.
- the horizontal section of the powder contact portion on the side wall is circular, and its lower portion (below the position where the powder guiding portion is formed with the inner guiding means) is substantially cylindrical. I need to do that.
- the rotating dish is a basic component in the centrifugal rolling granulator and has a function of applying a centrifugal force to the granules to roll. This does not give a random agitation action to the granules as in high-speed agitation granulation.
- the gap through which the gas flows should be substantially uniform over the entire circumference.
- the presence of a means for inwardly guiding the granular material is essential. is there. is there.
- the inward guiding means may be any means that has the function of guiding the granules, which have flowed up along the side wall by centrifugal flow, away from the powder contact portion of the side wall and inward.
- the inward guiding means may be any means that has the function of guiding the granules, which have flowed up along the side wall by centrifugal flow, away from the powder contact portion of the side wall and inward.
- such an inward guiding means may be provided with an upper diameter-reduced portion that is reduced in diameter upward, above the powder contact portion on the side wall.
- the upper reduced diameter portion may be configured to be inclined upward and conically toward the center of the peripheral portion of the dusting portion.
- the upper diameter-reduced portion may be formed as a curved surface that is upwardly convex toward the center of the peripheral portion of the powder contact portion.
- the present inventors have found that such a structure is a cause of insufficient rolling of the granular material in the conventional device. Further, in order to give sufficient granularity for the rolling operation to the granules and to perform uniform granulation, the lower part of the side wall, more precisely, from the position where the inner guiding means is formed in the powder contacting part to the rotating plate is provided. It is necessary that the gap is cylindrical over a certain height (about 0.1 to 0.4 times) of the diameter of the wetted part, and that the upper part must be reduced in diameter. all right.
- the contacting part is cylindrical means that the maximum diameter of the contacting part and the diameter of the rotating plate are substantially equal.
- the apparatus disclosed in Japanese Patent Publication No. 46-107787, the apparatus disclosed in Japanese Patent Publication No. Hei 11-24532, and the apparatus shown in FIG. 3 of Japanese Patent Publication No. 54-9902 are shown in FIG. Since the diameter of the central part is larger than that of the lowermost part of the side wall, the diameter of the rotating plate is considerably smaller than the maximum diameter of the side wall.
- the centrifugal force of the rotating dish required for the powder to rise up the dusting part of the enlarged diameter part compared to the configuration having a cylindrical dusting part with the maximum diameter substantially equal to the diameter of the rotating dish Is relatively small, and at the same time, it is estimated that the rising energy of the granular material is reduced by the friction of the enlarged diameter portion, and the rolling operation is weakened.
- the friction is greater than in the vertical powder contact part. It is necessary to travel a long distance on the wall compared to when climbing the wall, and it is considered that the rolling operation is weaker.
- the distance from the position corresponding to the peripheral edge of the rotating dish of the powder contact portion to the upper reduced diameter portion forming position is less than 0.1 times the diameter of the powder contact portion, for the same reason as described above, however, sufficient rolling and mixing were not performed, and a sufficiently significant difference was not recognized as compared with the conventional centrifugal rolling granulator. If the ratio exceeds 0.4, the powder must travel a long distance on the wall for the same reason as described above, and fall down to the reduced diameter portion, and still sufficient rolling and mixing can be achieved. No significant difference was observed in comparison with the conventional configuration. Therefore, as described above, it is preferable that the distance be in the range of 0.1 to 0.4 times. More preferably, it should be in the range of 0.15 to 0.35 times.
- the upper diameter-reduced portion has an upward inclination angle of 40 to 80 degrees, preferably 50 to 70 degrees, and is inclined upward toward the center. If the inclination angle is less than 40 degrees, the granular material that has risen in the powder contact portion falls as it is, and sufficient rolling operation cannot be obtained. If the temperature exceeds 80 degrees, the effect of rotating inward and dropping the ascending powder and granule is not sufficiently provided.
- the inward guiding means a method of providing the upper diameter-reduced portion as described above may be used, or the diameter may be reduced by projecting from the side of the powder contact portion on the side wall in the rotation direction of the rotary dish.
- You may comprise so that a side diameter reduction part may be provided.
- the side reduced diameter portion is formed by providing a plate-like member whose base portion is in close contact with the side wall and whose tip protrudes along the rotation direction of the rotating plate.
- the powder contact portion may be substantially cylindrical except for the laterally reduced diameter portion.
- the laterally reduced diameter portion may be formed at one place or may be formed at a plurality of places.
- the device of the present invention also includes, in addition to the above-mentioned inward guiding means, those in which the rotating plate is inclined such that at least the peripheral portion thereof is lowered inward.
- centrifugal force should be sufficient. It is required to give the powder to the granules, and for this purpose, the shape of the rotating dish is preferably as described above.
- the object of the present invention can be achieved only by the inward guiding means, it has been found that when the shape of the rotating dish is made in this way, a synergistic effect that is more than expected can be obtained.
- an air supply means for supplying gas to the upper surface side of the rotating plate may be provided.
- the product can be dried in the same apparatus, so that it is not necessary to transfer the product to another drying apparatus for drying, thereby improving productivity. I can do it.
- the centrifugal tumbling granulator according to the present invention may further include, in addition to the inward guiding means, at least a side wall having a circular horizontal cross section of a powder contact portion with the granular material; A rotating plate that is rotated in the horizontal direction by a rotation driving means, and is disposed above the rotating plate in close proximity to the rotating plate, and supplies gas to an upper surface of the rotating plate. And air supply means.
- the centrifugal tumbling granulator of the present invention can granulate heavy spherical particles having a small particle size and a narrow particle size distribution, similarly to the conventional centrifugal tumbling granulator.
- the product after the granulation treatment can be dried in the same apparatus. Therefore, there is no need to transfer the product to another device for drying, thereby improving productivity.
- the air supply means may supply gas to the rotating plate from above the center of the rotating plate. Further, the air supply means is disposed below the straight pipe portion in communication with the cylindrical straight pipe portion and the cylindrical straight pipe portion, and the lower end portion is formed in a conical shape with an enlarged diameter. It is good also as a structure which has the supplied air inlet. Furthermore, the air supply means may supply gas to the rotating plate from above the periphery of the rotating plate. In addition, the air supply means may be provided so as to be vertically movable between a lower position close to the rotating plate and an upper position farther from the rotating plate than the lower position.
- the air supply means may be arranged in a state where at least a part of the air supply means has entered the particle layer of the granular material, whereby gas is introduced into the particle layer, and the granulated material is formed. It becomes a fluid state and its drying is performed more efficiently.
- a powder supply means may be provided.
- the rotating plate may have a configuration in which a peripheral portion has a vertical cross section inclined downward toward the center, and a raised portion may be provided at a central portion of the rotating plate.
- gas may be supplied to the gap formed between the side wall and the rotating dish from below to above. This gas may be ordinary air, but may be a gas that has been appropriately treated such as dehumidification and heating.
- the air supply means when the air supply means is installed so as to be movable between a lower position close to the rotating plate and an upper position more distant from the rotation plate than the lower position, the air supply means is located at the upper position. At least one of the granulation step or the coating step may be performed in the state where the components are arranged. In the granulation step, gas supply from the gas supply means may be performed or stopped.
- At least one of a granulating step and a coating step may be performed in a state where the air supply means is arranged at a lower position close to the rotating dish.
- the drying step is preferably performed in a state where the air supply means is arranged at a lower position close to the rotating dish.
- a powder and granule processing method of the present invention is a powder and granule processing method using the above-described centrifugal rolling granulator, wherein the powder and granules are charged into the centrifugal rolling granulator, Rotating the rotating dish while supplying gas upward from below, and supplying at least one of a solvent, a solution, a dispersion, and a melt to granulate or coat the granular material.
- a gas may be supplied from the air supply unit to dry the granulated material of the granular material, and the powder may be further supplied to the centrifugal tumbling granulator. Good.
- the air supply means is installed so as to be movable between a lower position close to the rotating plate and an upper position farther from the rotation plate than the lower position, and the air supply means is positioned at the lower position.
- the drying step may be performed in a state where the drying step is arranged.
- the granulating process and the coating process may be performed in a state where the air supply unit is disposed at the upper position.
- the granulation coating process may be performed in a state where the granulation process and the coating process are performed in a state in which the granulation process and the coating process are arranged at a lower position close to the surface.
- a granulating process or a coating process may be performed while supplying a gas from the gas supply unit.These processes may be performed by stopping the gas supply. Is also good.
- the supplied gas may be at room temperature or may be heated.
- the drying step it is preferable to perform the drying process while supplying a gas from the air supply means, but it is preferable that the gas be heated.
- the supplied gas is not heated, for example, when the granulation treatment and the coating treatment are performed by supplying the melt.
- the air supply device for supplying dry air is provided above the rotating plate, and the granulated material is dried by the dry air.
- the granulated material is dried by the dry air.
- FIG. 1 is a sectional view of a centrifugal rolling granulator of the present invention.
- FIG. 2 is a cross-sectional view showing a modified example of the upper reduced diameter portion as the inward guiding means.
- FIG. 3 is a cross-sectional view showing a modified row of the upper diameter-reduced portion as the inward guiding means.
- FIG. 4 is a cross-sectional view showing a modified example of the upper reduced diameter portion as the inward guiding means.
- FIG. 5 is a cross-sectional view showing a modified example of the upper reduced diameter portion as the inward guiding means.
- FIG. 6 is an explanatory diagram showing a dimensional relationship of each part in the configuration of the upper reduced diameter part.
- FIG. 7 is a cross-sectional view showing a configuration provided with an air supply means so as to dry the granules.
- FIG. 8 is a partial perspective view showing the configuration of the air supply means.
- FIG. 9 is a cross-sectional view showing a modification related to the air supply means of the centrifugal tumbling granulator of the first embodiment.
- FIG. 10 shows a modification related to the air supply means of the centrifugal tumbling granulator of the first embodiment. It is sectional drawing.
- FIG. 11 is a cross-sectional view showing a modification related to the air supply means of the centrifugal tumbling granulator of the first embodiment.
- FIG. 12 is a cross-sectional view showing a modification related to the air supply means of the centrifugal rolling granulator of the first embodiment.
- FIG. 13 is a cross-sectional view showing a modification related to the air supply means of the centrifugal tumbling granulator of the first embodiment.
- FIG. 14 is a cross-sectional view showing a modification related to the air supply means of the centrifugal tumbling granulator of the first embodiment.
- FIGS. 15A and 15B are cross-sectional views showing modified examples of the centrifugal rolling granulator according to the first embodiment related to the air supply means.
- FIG. 16 is an explanatory diagram showing a dimensional relationship between a vertical cross section and a flat cross section of a laterally reduced diameter portion as an inward guiding means according to Embodiment 2 of the present invention.
- FIG. 17 is a cross-sectional view showing the state of attachment of the plate member.
- FIGS. 18A and 18B are partial perspective views showing a state in which the plate-like member is formed into a twisted shape, and FIG. 18B is a state in which the side reduced diameter portion is integrally protruded from the powder contact portion.
- FIG. 18A and 18B are partial perspective views showing a state in which the plate-like member is formed into a twisted shape
- FIG. 18B is a state in which the side reduced diameter portion is integrally protruded from the powder contact portion.
- FIG. 19 is an explanatory view showing a configuration of a main part of a centrifugal rolling granulation coating apparatus according to Embodiment 3 of the present invention, where (A) is a cross-sectional view, and (B) is a cross-sectional view of FIG. FIG. 2 is a perspective view showing a state cut along line A from above.
- FIG. 20 shows a first modification of the granulation coating apparatus according to the third embodiment.
- FIG. 21 shows a second modification of the granulation coating apparatus according to the third embodiment, where (A) is a cross-sectional view, and (B) is a perspective view from above, taken along line BB of (A). It is a figure.
- FIG. 22 is an explanatory diagram showing a configuration of a main part of a centrifugal rolling granulation coating apparatus according to Embodiment 4 of the present invention.
- FIG. 23 is an explanatory diagram showing the configuration of the CF device according to the fifth embodiment of the present invention.
- FIG. 24 is an explanatory diagram showing a state of air blowing from the air supply device.
- a centrifugal tumbling granulator (hereinafter, referred to as a CF device) 1 performs centrifugal tumbling of granules 2 to form granules or form a coating layer.
- a CF device a binder liquid or powder is added to the powder 2 at a predetermined speed, and the powder 2 such as an amorphous fine powder is combined with the powder 2 as a core or a spherical Is performed.
- a coating layer can be formed on granules and the like by adding powder and binder solution while centrifugally rolling spherical granules and the like.
- Such a CF device 1 is composed of a centrifugal rolling section 3 located at the top of the apparatus, and a rotation drive section 4 located at the bottom.
- the centrifugal rolling section 3 is formed with a centrifugal rolling chamber 5 for performing a granulation coating process by centrifugally rolling the charged granular material 2.
- the centrifugal rolling chamber 5 is composed of a cylindrical side wall 6 that forms a housing of the CF device 1, and a rotating dish 7 that serves as a substantial bottom of the centrifugal rolling chamber 5 by centrifugally rolling the granular material 2. .
- the upper part of the centrifugal rolling chamber 5 is open in the case shown in FIG. 1, the parts other than those which need to communicate with the outside may be closed.
- the side wall 6 has a circular horizontal section at the powder contact portion 6 a with the granular material 2, and a gap d at a predetermined interval is formed between the rotating plate 7 and the inner wall of the side wall 6.
- the reason why the horizontal cross section of the powder contacting portion 6a is circular is to smoothen the movement of the centrifugally rolling powder and granular material 2 and not to create a dead space.
- the upper side of the side wall 6 is bent inward at an angle â , and the upper reduced diameter portion 8 formed like a frustoconical eaves in its entirety guides the powder 2 inward. It is provided as guidance means.
- the powder contact portion 6a inside the side wall 6 is continuous with the reduced diameter powder contact portion 8a inside the upper reduced diameter portion 8, and the granular material that has risen in the powder contact portion 6a is reduced in force. It is guided to fall while rotating inward along the powder contact part 8a.
- the height of at least the side wall 6 from the position corresponding to the peripheral edge of the rotating plate 7 to the start position of the upper reduced diameter portion 8 is formed in a cylindrical shape.
- the side wall 6 has a circular horizontal section up to the upper diameter-reducing portion 8 of the centrifugal rolling portion 3.
- the cross-sectional shape of the portion other than the powder contact portion 6a is not limited to a circle. That is, the side wall 7 may have a conical shape or a spherical shape, and a part of the side wall 7 may be configured to form the powder contact portion 6a having a circular cross section.
- the material constituting the side wall 6 and the upper reduced diameter portion 8 there is no particular limitation on the material constituting the side wall 6 and the upper reduced diameter portion 8, but various materials such as stainless steel, iron, light alloy, and reinforced plastic can be used.
- a part or all of the powder contact part 6a and the reduced diameter powder contact part 8a may be lined with a non-adhesive resin such as fluororesin or polyester.
- a non-adhesive resin lining may also be applied to the center portion 7a and the inclined portion 7b of the rotating plate 7 described below, and the granulated material and the coated material are subjected to the powder contacting portion 6a, It can be prevented from adhering to the reduced diameter welding part 8a and the rotating dish 7.
- the powder 2 can be supplied into the centrifugal rolling chamber 5 from an upper opening 8b surrounded by the upper reduced diameter portion 8 through a powder supply pipe (not shown). Furthermore, spray nozzles for spraying liquids such as binder liquids, solvents, solutions, dispersions, emulsions, and melts and powders stored in tanks (not shown) onto the powders 2 can be provided. I just need to.
- a nozzle having a two-fluid or three-fluid structure may be used as the spray nozzle.
- the spray nozzle may be positioned above the granular material layer, or may be installed so as to spray into the granular material layer from the side.
- the purpose of supplying the spray liquid to the granules may be achieved.
- various sensors for process control and end point control, and an actuator for changing the position of the spray nozzle according to the sensor may be provided.
- the rotating plate 7 may have a configuration in which an inclined portion 7b is provided in an edge shape on a peripheral side of a central portion 7a on a plane located at the center side, or as shown in FIG. As described above, if the inclined portion 7b which is inclined downward toward the center on the peripheral side of the central portion 7a is formed, the centrifugal force of the rotating plate 7 is sufficiently utilized, and 2 rises along the side wall contacting portion 6a, and is more efficiently centrifugally rolled.
- Such a combination of a mortar-shaped rotating cone and a reduced diameter portion is extremely effective in an apparatus capable of uniformly granulating an amorphous fine powder as in the present invention.
- a substantially hemispherical raised portion 9 is formed at the center of the central portion 7a of the rotating plate 7, whereby the rotating plate 7 is prevented from being distorted and has sufficient strength.
- the protruding portion 9 allows the powder 2 in the vicinity of the center of the rotating plate 7 to be positively moved to the peripheral portion of the rotating plate 7 where the centrifugal operation is performed.
- the portion of the inner wall of the side wall 6 with which the granular material 2 contacts during centrifugal rolling that is, the powder contact portion 6a, is formed substantially perpendicular to the central portion 7a of the rotating plate 7. ing . As a result, the granular material 2 that centrifugally rolls on the rotating plate 7 is pushed upward along the powder contact portion 6a without receiving extra resistance.
- an air supply port 6b for introducing a slit 10 that circulates through the gap d between the rotating plate 7 and the side wall 6 into a fluid chamber 11 formed below the rotating plate 7 has been established.
- the air taken in from here becomes slit air 10 passing through the annular gap d from the fluid chamber 11 and is introduced into the centrifugal rolling chamber 5.
- the gap d is formed to have such a width that the granular material 2 in the centrifugal rolling chamber 5 does not drop from the slit air 10 when the slit air 10 is fed from below.
- the granular material 2 is prevented from dropping from the gap d, and when the granular material 2 is charged into the centrifugal rolling chamber 5, the granular material 2 Are all supported by the rotating plate 7.
- the rotation drive unit 4 is provided so as to be accommodated in a motor (rotation drive means) 12 for rotating the rotation plate 7.
- the shaft 12a of the motor 12 is fixed to the center axis of rotation of the rotating plate 7, whereby the rotating plate 7 is rotated in the horizontal direction.
- the CF device 1 thus configured can perform centrifugal tumbling granulation by using as follows. First, in the granulation step, a predetermined amount of the granular material 2 as a raw material to be processed is put on a rotating dish 7 in a centrifugal rolling chamber 5. At this time, the powder 2 used as a raw material may be a powder, a core serving as a core, or an irregular fine powder. Thereafter, the rotating plate 7 is rotated by the motor 12 while the slit air 10 flows through the gap d, and the powder 2 is centrifugally rolled on the rotating plate 7. In this case, the rotation speed of the rotating plate 7 is arbitrary, but is usually 100 to 500 n) m.
- a spray nozzle to attach the powder to each other or to the core particles. Then, a solution in which a solvent or a binder solution is dissolved, a dispersion solution such as an emulsion or a suspension, or, in some cases, a melt is sprayed into the centrifugal rolling chamber 5.
- the solvent or the solution may be used alone depending on the physical properties of the granules 2 or the desired granulated material, or may be changed from one to the other depending on the progress of granulation.
- a solution a substance having the same component as that of the granular material 2 is usually used as a solute, but another substance may be used.
- powder may be supplied during the granulation step as needed.
- the granular material 2 is centrifugally rolled on the rotating dish 7 in the centrifugal rolling chamber 5, and a binder liquid or powder is supplied to the granular material 2 in that state, and the granular material 2 is formed. It is centrifuged and spherically granulated.
- the CF device 1 is provided with an inward guiding means, so that sufficient rolling operation can be given to the granulated material, and the particle diameter is small.
- Spherical particles having a narrow particle size distribution can be granulated with high yield.
- large spherical particles can be produced.
- spherical particles produced separately can be charged into the apparatus of the present invention, and a drug or an elution control layer can be coated thereon. Further, not only spherical particles but also particles such as irregular particles and irregular fine powder can be coated with a drug or an elution control layer.
- the contact portion 6 a of the side wall 6 has a circular horizontal cross section as described above, and in particular, rotates from the reduced contact portion 8 a which is an inward guiding means of the contact portion 6 a.
- the plate 7 is formed substantially as a cylinder up to the peripheral edge of the inclined portion 7b.
- the side walls 6 other than the upper reduced diameter portion 8 may be cylindrical.
- the shape other than the powder contact part 6a is optional.
- a cylindrical, mounted conical or square filtration chamber may be provided above the reduced diameter portion 8 to house a bag filter, a cartridge filter, or the like, and exhaust air to the outside through this.
- a bag filter a bag filter, a cartridge filter, or the like
- the rotating plate 7 only needs to have a circular outer edge.
- the peripheral portion may have a vertical cross section inclined downward toward the center.
- those having a shape as disclosed in the above-mentioned Japanese Patent Application Laid-Open Nos. Hei 7-23049 and Hei 10-128907 have large processing capacity and effective centrifugal rotation. It is suitable for performing the movement.
- the whole may be flat.
- the rotating plate 7 may have a raised portion 9 at the center.
- the inward guiding means in the above description, the case where the upper reduced diameter portion 8 is extended like the side wall 6 like an eave and the vertical cross section is extended linearly is shown, for example, as shown in FIG. It does not matter even if it is formed in a shape. Further, the distal end of the upper reduced diameter portion 8 may be further bent inward and downward as shown in FIGS.
- the bent portion 8b may have a curved shape as shown in FIG. 4 or a linear shape as shown in FIG. In short, it suffices if it is configured such that the granules are guided from the side wall 6 into the centrifugal rolling chamber 5 to promote the rolling operation. Further, the upper reduced diameter portion 8 may be movable up and down or the mounting angle is variable.
- the inventor has found an optimum dimensional range in installing the upper reduced diameter portion 8. It has been confirmed by experiments that the particle size distribution of the granules to be produced is significantly different between the optimum dimensional range for each portion of the upper reduced diameter portion 8 and outside the range, and the average particle size is also significantly different. That is, the critical significance of the above-mentioned optimal dimensional range is great.
- the inclination angle () Is 40 to 80 °, preferably 50 to 70 °.
- the upper diameter-reduced portion 8 may have a curved surface whose vertical cross section is a convex curve, that is, a curved shape. In that case, the angle connecting the upper edge and the lower edge of the reduced diameter portion 8 is preferably within the above range.
- the height of the cylindrical portion below the upper reduced diameter portion 8 (H is 0.1 to 0.4 times, preferably 0.15 times the diameter (D) of the dusting portion 6a of the side wall 6) Above this value, there is no inward guiding effect, and if it is less than this value, the rolling becomes poor.
- 0.6 to the diameter (D!) of the cylindrical part of a 0.95 times, preferably 0.7 to 0.9 times. If it is less than this, the inductive effect is not sufficient, and if it is larger, the effect does not change.
- FIG. 6 is a diagram schematically showing the positional relationship between D, H, and does not take into account the dimensional relationship in the above range.
- a gas for drying is supplied into the centrifugal rolling chamber 5 so that the drying function is provided together with the centrifugal rolling granulation function. It may be configured, and is described in detail in Japanese Patent Application No. Hei 11-29692.
- supply means for supplying gas for drying to the upper surface of the rotating plate is provided. It may be provided so that the granules can be dried.
- FIG. 7 is different from the case shown in FIG. 1 in that the shape of the rotating plate 14 and the air supply means are provided.
- the same parts as those in the configuration shown in FIG. 1 are denoted by the same reference numerals.
- FIG. 8 is an explanatory view showing an arrangement state of the air supply device 21.
- the air supply device 21 is omitted so that the upper part of the upper reduced diameter portion 8 provided above the centrifugal rolling chamber 5 is easily seen.
- 1 shows a state viewed from above.
- This air supply device 21 is composed of a straight pipe portion 22 formed in a straight cylindrical shape, and an umbrella-shaped air supply port 23 provided below the straight pipe portion 22. .
- the straight pipe section 22 and the air supply port 23 communicate with each other inside, and the straight pipe section 22 is connected to a blower (not shown) such as a blower provided outside the CF device 1.
- the air supply device 21 is mounted so as to be able to move up and down in the centrifugal rolling chamber 5 by driving means (not shown). Then, it is possible to move between an upper position H indicated by a dashed line and a lower position L indicated by a solid line in FIG. However, it is needless to say that the air supply device 21 may have a fixed structure.
- the conical or umbrella-shaped air supply port 23 attached to the lower end of the straight pipe section 22 has an enlarged diameter on the lower side, and rotates at the lower end when the air supply device 21 is lowered to the lower position L.
- the plate 14 is configured to cover a central portion 14a and a part of the inclined portion 14b in an umbrella shape. From the opening 23 a of the air supply port 23, dry air 24 can be supplied widely to the upper surface side of the rotating plate 14. And the lower edge 2 3 c of the air supply port 2 3 and the rotating plate Dry air 24 is blown out from the gap between the two. As a result, the granulated material flows in the centrifugal rolling chamber 5, and its drying is promoted. In other words, the CF device 1 can dry the granules generated by the drying air 24, and can perform a sufficient centrifugal rotation operation from a granulation process to a drying process in a single device. Can be implemented.
- the rotating plate 14 has a central portion 14a on a plane located on the center side, and an inclined portion 1 which is inclined linearly downward toward the center outside the central portion 14a. 4b.
- the vertical cross section of the rotating plate 14 is such that P â 0.25D (preferably, the horizontal dimension (P) of the inclined portion 14b and the diameter (D) of the rotating plate 5). , 0.4 D â P â 0.25 D).
- the height (H) of the inclined portion 14b from the central portion 14a is 0.1 D â H â 0.33 D (preferably 0.1 D) with respect to the diameter (D). â H â 0.25 D).
- a conical raised portion 15 is formed at the center of the center portion 14a of the rotating plate 14 to thereby prevent the rotating plate 14 from being distorted and secure its strength.
- the raised portion 15 actively moves the granular material 2 near the center of the rotating plate 14 to the inclined portion 14b in which the centrifugal operation is performed.
- the air supply is stopped while the air supply device 21 is raised to the upper position H, and the rotating plate 14 in the centrifugal rolling chamber 5 is stopped.
- a predetermined amount of the granular material 2 which is a raw material to be treated is put on the top.
- the granulation process of the granules 2 is performed as described above with reference to FIG. 1, and after the granulation process, the air supply device 21 is lowered to the lower position L, and the drying process is subsequently performed. Do.
- the CF device 1 equipped with an air supply unit that supplies dry air while guiding the granules inward, tumbling granulation of irregular fine powder that could not be performed by the conventional device
- the granulated powder can be dried by the same apparatus.
- conventional CF machines in addition to rolling granulation of amorphous fine powder, drying in the same machine is not possible.In particular, during drying, the granulation is transferred to another machine. I had to do it.
- the drying method is described.
- the air supply from the air supply device 21 which has been raised to the upper position H is started, and the air is gradually reduced to the lower position L.
- dry air 24 is introduced from the air supply device 21 into the granulated material layer on the rotating plate 14 to be in a fluidized state.
- the granulated material is quickly dried by the drying layer 24, and a desired spherical particle product is efficiently produced.
- the rotating plate 14 may be in a rotating state or a stopped state.
- the height of the lower position L of the air supply device 21 is not particularly limited, but at least a part of the air supply device 21 is allowed to enter the accumulation layer of the granulated material, and the granulated material is dried. It is preferable to perform vertical movement in a flow state or a state close to the flow state by the dry air 24. That is, also in the CF device 1, the air supply device 21 is arranged at a position where the periphery of the opening 23a of the air supply port 23 is buried in the particle layer so as to improve the drying efficiency. It is desirable to do.
- the CF device 1 can granulate heavy spherical particles having a small particle size and a narrow particle size distribution, just like a conventional single-function CF device. It is possible to granulate irregularly shaped fine powder, which could not be sufficiently achieved with the conventional CF device, and it can also be dried in the same device. Therefore, products with the physical properties of a single-function CF device can be manufactured with the productivity equivalent to that of a multi-function powder processing device, and products that meet market needs can be manufactured efficiently. This is possible.
- the particles after the granulation process or the particles separately charged are supplied to the air supply device 2. 1 can be placed at the upper position H to perform the coating treatment, and then dried at the lower position L.
- the air supply device 21 is placed at the lower position L from the beginning, and the coating process and the drying process can be performed continuously (âcoating-dryingâ) or simultaneously (âcoating-dryingâ). Can also be.
- the air supply device 21 is disposed at the lower position L to perform the process.
- the air supply device 21 may be disposed at any position above or below. That is, it is also possible to perform the processing at the lower position L from granulation to drying, or to perform only the granulation processing at the upper position H.
- the air supply device 21 when performing the process of âgranulation-coating + dryingâ, at least in the process of drying while coating, the air supply device 21 is disposed at a lower position to perform the process.
- the air supply device 21 may be arranged at any position above or below.
- FIGS. 9 to 15 show first to seventh modified examples of the air supply device 21 having a configuration for supplying the dry air 24 from above the center of the rotating plate 14.
- FIGS. 9 to 15 show first to seventh modified examples of the air supply device 21 having a configuration for supplying the dry air 24 from above the center of the rotating plate 14.
- FIG. 9 only the main part of the device is shown, and the description of the parts common to the device of FIG. 7 is omitted, and the same members and parts as those of the air supply device 21 of FIG. 7 are described.
- the same reference numerals are used and the details are omitted.
- the air supply device 21 is formed only by the straight pipe portion 22 and is disposed at the center of the centrifugal rolling chamber 5, and the umbrella-shaped air supply port 23 is omitted. In this case, it is configured so as to be located above the opening 22 of the straight pipe portion 22 and the raised portion 15.
- the rotating plate 14 also has a flat plate shape with the edge formed on the inclined portion 14 b rising up on the outer periphery.
- the apparatus shown in Fig. 10 is a rotating dish 14 in which the central portion 14a of the rotating dish 14 in Fig. 7 is eliminated, and an inclined portion 14b is formed from the outer edge toward the base of the raised portion 15 Is used. Further, the opening angle of the air supply port 23 of the air supply device 21 is formed larger than that of FIG.
- the device shown in FIG. 11 uses a tapered cylindrical member having an enlarged lower end as the air supply device 21. Further, as the rotating plate 14, one having an inclined portion 14 b formed slightly deeper and steeper than that shown in FIG. 7, and the raised portion 15 is omitted is used.
- a narrowed skirt is used as the side wall 6, and the inclined portion 14b of the rotating plate 14 is formed at the same inclination angle as the skirt narrowed portion 6c of the side wall.
- the air supply device 21 a device in which a flange 25 is provided in the air supply port 23 so as to substantially cover the upper surface of the rotating plate 14 is used.
- the side wall 6 is formed in a curved shape.
- the horizontal cross section of the dusting portion 6a of the side wall 6 is formed in a circular shape as one cross section of a sphere.
- the air supply device 21 the same device as that shown in FIG. 10 is used.
- the rotating plate 14 the one in which the raised portion 15 of the rotating plate 14 in FIG. 7 is finely pointed is used.
- the tip of the raised portion 15 is used. Comes to the position of the opening 22 a of the straight pipe part 22.
- the device in Fig. 14 uses a rotating dish 14 in which a raised portion 15 is formed in a hemispherical shape, and an inclined portion 14b is linearly raised obliquely upward from the base of the raised portion 15. I have.
- the side wall 2 3 b force of the air supply port 23 has a form that rises along the inclined portion 14 b of the rotating plate 14, contrary to the conventional one.
- a cover 26 is attached between the upper end edge of the side wall 23 b and the straight pipe part 22 so that the soaked granules do not collect inside the side wall 23 b.
- the device of (A) uses a rotating plate 14 in which a raised portion 15 is formed in an elliptical hemisphere and an inclined portion 14b is also formed in a curved surface.
- a rotating plate 14 in which a raised portion 15 is formed in an elliptical hemisphere and an inclined portion 14b is also formed in a curved surface.
- the air supply device 21 the one shown in FIG. 7 in which a flange 23 d is formed on the lower peripheral edge 23 c of the air supply port 23 is used.
- a tapered projection 31 is provided inside the side wall 6 and a rotating plate 14 is installed vertically movable so that the width of the gap d can be changed.
- the amount of slit air 10 may be adjustable.
- Embodiment 2 of the present invention a configuration in which a reduced-diameter portion serving as inward guiding means is provided on a side wall will be described.
- the side wall 16 is formed in a cylindrical shape, and the inside thereof is formed as a centrifugal rolling chamber 17. From the powder contact portion 16a inside the side wall 16, a plate-like member 18 bent in an arc shape is provided as a side reduced diameter portion as an inward guiding means. The plate-like member 18 bent in an arc shape is provided so as to protrude from the powder contact part 16 a in the direction of rotation of the rotating plate 14, that is, to reduce its diameter, in the direction of rotation of the rotating plate 14. I have. As described above, with a simple configuration in which the plate-shaped member 18 is provided, it was possible to provide a sufficient rolling operation required for granulating the irregularly shaped fine powder.
- the plate member 18 is attached between the back side of the plate surface of the plate member 18 and the powder contact portion 16a. If it is installed along the longitudinal direction, for example, with a fixing member 19 interposed, even if the baffle 18 is pressed by rolling particles during rolling, the curved surface of the plate-shaped member 18 will be deformed A sufficient rolling operation can be maintained without any problem.
- the fixing member 19 for example, a bar â or a plate material adapted to the vertical length of the plate member 18 may be used, for example, and the bolt-shaped locking portion of the fixing member 19 having such a configuration may be used as a side wall.
- the nut 16 may be fixed from the outside of the side wall 16 with the nut 20 by passing through the locking hole 16.
- any attachment means may be adopted as long as the attachment can be performed without impairing the rolling function of the granular material of the plate-shaped member 18. For example, detachable mounting You may be able to.
- the present inventors have found that the plate-like member 18 having the above configuration has an optimum range in the mounting position and the like, and by setting the optimum range, sufficient rolling operation can be obtained. I can tell you.
- the length (L) of the arc-shaped plate material of the plate-shaped member 18 is 0.02 to 0.5 times, preferably 0.03 times, the entire circumference (C) of the powder contact portion 16 a of the side wall 16.
- the total length ( â L) is 0.04 to 0.7 times the entire circumference, preferably 0.06 to 0.4. It is better to double. The effect is small if it is larger or smaller than this range.
- the width (W) is the height of the powder contact portion (H 3 ) of the side wall. 0.1 to 0.95 times the height of the lower end (h), which is about 0.05 to 0.7 times the height of the dusting part (H 3 ) above the upper edge of the rotating plate. It is better to do it.
- the arc-shaped shape of the plate-shaped member 18 having the above-described configuration may be uniformly curved at the same curvature, or may be curved by gradually changing the curvature.
- the plate member 18 may be provided symmetrically with respect to the rotational center of the rotating plate 14.
- the plate-like member 18 may have a structure in which the lower edge is in close contact with the powder contact portion 16a of the side wall or at a narrow interval, and the upper edge is wide with the powder contact portion 16a.
- a twisted configuration as shown in FIG. 18 (A) may be used.
- the powder contacting portion 16a may be cylindrical except for the side reduced diameter portion.
- the side reduced diameter portion of the above configuration is configured such that the plate member 18 is attached to the powder contact portion 16a, but, for example, the powder contact portion 16a is integrally directed toward the centrifugal rolling chamber side.
- the projecting portion 16b may be provided from the beginning so as to impart sufficient rolling operation to the granular material. This is shown in Figure 18 (B).
- the upper side of the rotating plate, the proximity of the rotating plate An air supply means for supplying a gas to the air may be provided.
- This air supply means may be movable up and down, and, similarly to FIG. 7, for example, an apparatus as shown in Japanese Patent Application No. 11-296966 is exemplified.
- the device of the present invention used in the same manner as described in item 1 is characterized in that the device having the conventional configuration cannot be produced with a sufficient yield, and the amorphous fine powder is granulated. Although useful for obtaining fine particles, it can also produce granules having a large particle diameter.
- the granulation it is possible to granulate the powder itself as a raw material, or to granulate by attaching fine powder to core particles.
- These granules can be of any shape, from amorphous to spherical, depending on the conditions.
- the device of the present invention can also be used to coat spherical particles and irregular particles with high molecular substances, oils and fats, saccharides and the like.
- FIG. 19 is an explanatory view showing a configuration of a main part of a CF device according to a second embodiment of the present invention.
- FIG. 19A is a cross-sectional view
- FIG. 19B is a cross-sectional view of FIG.
- FIG. 19 is a perspective view from the upper side showing the state in which the air supply device 21 is used.
- a gap 27 is formed between the straight pipe portion 22 and the inner surface of the side wall 6, and the dry air 24 flows through the gap 27.
- an opening 27 a of a gap 27 is formed at the lower end of the straight pipe 22.
- dry air 24 is supplied from above to the inclined portion 14b located at the periphery of the rotating plate 14 from the opening 27a.
- the drying air 24 is supplied to the granulated material on the rotating plate 14 to dry the granulated material.
- the air supply device 21 is installed so as to be movable in the vertical direction.
- FIGS. 20 and 21 show first and second modified examples of the CF device according to the second embodiment.
- the straight pipe section 22 of the air supply device 21 arranged in the center of the centrifugal rolling chamber 5 branches off above the rotary plate 14, and the branch pipe 28 becomes a rotary plate. It is a form that extends upward around the periphery of 14.
- the number of branch pipes 28 can be increased or decreased as appropriate, for example, four branch pipes are provided.
- a plurality of straight pipe portions 22 of the air supply device 21 are provided around the centrifugal rolling chamber 5.
- Fig. 21 is a cross-sectional view of Fig. 1 (A) and a perspective view from above showing a section taken along line B-B of (A).
- four straight pipe sections 22 are equally divided. Dry air 24 is supplied to the periphery of the rotating plate 14 from the lower end opening.
- the number of straight pipe sections 22 can be appropriately increased or decreased, for example, two or six.
- FIG. 22 is an explanatory diagram showing a configuration of a main part of a CF device according to Embodiment 4 of the present invention.
- the air supply device 21 is disposed on the side wall 6.
- the air supply device 21 is opened on the upper side of the rotating plate 14, from which dry air 24 is supplied above the rotating plate 14.
- an opening / closing door 30 is provided at the opening 29 of the air supply device 21, and the opening / closing door 30 is closed during the granulation process. Then, at the time of the drying step, it is opened and the drying air 24 is introduced into the centrifugal rolling chamber 5.
- FIG. 23 is an explanatory diagram showing a configuration of a CF device according to a fifth embodiment of the present invention
- FIG. 24 is an explanatory diagram showing a state of blowing air from an air supply device 21.
- the upper reduced diameter portion 8 is formed as a ring-shaped convex portion on the powder contact portion 6a, and the lower slope of the convex portion is the reduced diameter powder contact portion 8a.
- a supply pipe 2 a for supplying the granular material 2 to the rotating plate 14 is further provided with its inlet facing the rotating plate 14.
- a spray nozzle 2b for spraying the binder liquid and the granular material stored in a tank (not shown) onto the granular material 2 is provided. I have.
- the air blown from the air supply device 21 is sent vertically onto the rotating plate 14 for granulation and drying.
- the air since the air is blown in a straight line, it easily blows through the rotating plate 14 and the circulation time there tends to be short.
- an agitator (baffle plate) 32 is provided in the air supply device 21 to generate a swirling airflow, thereby improving the processing efficiency. Is being planned.
- a plurality of agitates 32 are provided in the air supply port 23 of the air supply device 21, whereby the swirling wind is supplied onto the rotating plate 14.
- Agitator 32 is a crescent-shaped steel plate having a thickness of about 5 to 10 mm, and is arranged radially on the inner wall of air supply port 23. Then, between adjacent agitates 32, a radiation guide path 33 is formed in a spiral shape.
- the air guide path 33 is formed from the upper portion of the air supply port 23 to the opening 23 a, and the airflow passing therethrough becomes a swirling airflow on the rotating plate 14 as shown in FIG. Sent.
- a turning motion can be imparted to the granular material on the rotating plate 14, and the granular material is spirally wound up like a rope. Therefore, the rolling of the granular material can be promoted, and the processing efficiency can be improved.
- an agitator In the devices shown in Figs. 7, 8, 10, 13, 15, 15 (A) and (B), it is sufficient to attach an agitator to the inner wall of the air supply port 23 of the air supply device 21.
- an agitator In the apparatus shown in FIGS. 9, 12, 14, and 19, an agitator may be attached to the inner wall at the lower end of the straight pipe section 22. Further, in the apparatus shown in FIG. 11, an agitator is mounted on the inner wall on the lower end side of the tapered enlarged portion.
- the branch pipe 28 and the straight pipe section 22 are arranged obliquely toward the rotation direction of the rotating plate 14, and are placed on the rotating plate 14 in the rotating direction.
- a swirling airflow can be obtained.
- an agitator may be provided on the inner wall at the lower end of the branch pipe 28 or the straight pipe section 22.
- the air supply device A swirling airflow can be obtained by attaching the blower tube 21 obliquely to the side wall 6. In this case, it is more effective to arrange the air supply device 21 in the tangential direction of the side wall 6 and supply the dry air 24 in the tangential direction of the rotating plate 14.
- the shape of the agitate is not limited to the crescent shape, but may be, for example, a rectangular plate obtained by twisting a band plate material as long as it can form a radiating spiral air duct 33.
- the invention made by the inventor has been specifically described based on the embodiments, the present invention is not limited to the above embodiments, and it is needless to say that various modifications can be made without departing from the gist of the invention. Nor.
- a baffle or a guide plate inside the side wall 6 for adjusting the rolling operation.
- a sensor for detecting temperature, humidity, the amount of accumulated contents, and the like may be provided in the centrifugal rolling chamber 5.
- a filling device such as a bag filling device or a force filling device, a cyclone, or the like may be provided, and a device for heating, cooling, dehumidifying, etc. the dry air 24 or the slit air 10 may be provided.
- a temperature control means such as a jacket can be provided outside the side wall 6.
- the inward guiding means of the granular material is provided continuously in the powder contacting part, unlike the conventional centrifugal rolling granulator having no such configuration, the irregular fine powder is formed. In this case, a sufficient rolling operation can be provided. Therefore, unlike a conventional centrifugal rolling device, it is possible to produce a fine and uniform granulated part obtained by granulating an amorphous fine powder with a high yield.
- sieving fine granules with a uniform particle size of 70 mesh (2 12 m) or less into granules with a wide particle size distribution The production can be performed efficiently and in good yield without going through conventional inefficient processes. To that extent, manufacturing costs can be reduced, and products that are sufficiently practical not only in terms of quality, such as particle size distribution, but also in terms of price can be manufactured.
- an air supply device for supplying dry air is provided above the rotating plate, and the granulated material is dried by the dry air, whereby the granulated material is dried in the same device.
- the granulated product becomes heavy spherical particles having a small particle size and a narrow particle size distribution, which cannot be performed by a conventional multifunctional granulation coating apparatus, and high-quality spherical particles are produced. Efficient production is possible.
- the air supply means with a swirling airflow generating means for supplying swirling air onto the rotating plate, a swirling motion can be imparted to the granular material on the rotating plate, and the rolling of the granular material can be performed. Is promoted, and the processing efficiency can be improved.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Glanulating (AREA)
- Formation And Processing Of Food Products (AREA)
- Drying Of Solid Materials (AREA)
Description
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WO2001068232A1 true WO2001068232A1 (fr) | 2001-09-20 |
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CN107413281A (zh) * | 2017-04-26 | 2017-12-01 | éä¿ç¿° | äžç§é«èœ¬é湿æ³åªåé ç²æº |
CN115301155A (zh) * | 2022-09-05 | 2022-11-08 | æ¹å人çŒå å»è¯çç©å·¥çšæéå ¬åž | äžç§é溶é¢ç²çå¶å€æ¹æ³åè£ çœ® |
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JP2004016925A (ja) | 2002-06-17 | 2004-01-22 | Taisei Corp | 管å é¢ã©ã€ãã³ã°è£ 眮 |
JP2007216126A (ja) * | 2006-02-15 | 2007-08-30 | Seiko Epson Corp | é ç²è£ 眮 |
JP4611432B1 (ja) * | 2009-07-06 | 2011-01-12 | æ ªåŒäŒç€Ÿä»²ç°ã³ãŒãã£ã³ã° | ã¿ã³ãã©ãŒã³ãŒãã£ã³ã°è£ 眮åã³ã¿ã³ãã©ãŒã³ãŒãã£ã³ã°æ¹æ³ |
DE102010013096A1 (de) | 2010-03-29 | 2011-09-29 | Haver Engineering Gmbh | Pelletiereinrichtung und Verfahren |
KR200474256Y1 (ko) * | 2013-08-29 | 2014-11-03 | ì ëŠ¬ë§ ìžëì€ížëŠ¬ìŒ ìœí¬ë ìŽì , ìí°ë. | ìíì ìì ë£ë êž°êž°ì ì ë구조 |
KR101514433B1 (ko) * | 2014-07-30 | 2015-04-24 | ëììì§ëìŽë§(죌) | ê³ ë°ëì ê· ìŒí ê·žëëŒì ì±ííêž° ìí ì°ìì ê·žëëŒ ì±íì¥ì¹ |
JP6188031B2 (ja) * | 2015-03-09 | 2017-08-30 | æ ªåŒäŒç€Ÿå·¥æ® | é£åçšç²ä»ãè£ çœ® |
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US4946359A (en) * | 1988-09-22 | 1990-08-07 | Ciba-Geigy Corporation | Apparatus for making spherical granules |
JPH07299348A (ja) * | 1994-05-06 | 1995-11-14 | Freunt Ind Co Ltd | æµåé ç²ã³ãŒãã£ã³ã°æ¹æ³ããã³è£ 眮 |
WO1997020625A1 (en) * | 1995-12-01 | 1997-06-12 | Aeromatic-Fielder Ag | An apparatus and a method for treating particulate materials |
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US4826325A (en) * | 1986-11-06 | 1989-05-02 | Fukae Powtec Corporation | Particle processing apparatus |
US4946359A (en) * | 1988-09-22 | 1990-08-07 | Ciba-Geigy Corporation | Apparatus for making spherical granules |
JPH07299348A (ja) * | 1994-05-06 | 1995-11-14 | Freunt Ind Co Ltd | æµåé ç²ã³ãŒãã£ã³ã°æ¹æ³ããã³è£ 眮 |
WO1997020625A1 (en) * | 1995-12-01 | 1997-06-12 | Aeromatic-Fielder Ag | An apparatus and a method for treating particulate materials |
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CN107413281A (zh) * | 2017-04-26 | 2017-12-01 | éä¿ç¿° | äžç§é«èœ¬é湿æ³åªåé ç²æº |
CN107413281B (zh) * | 2017-04-26 | 2023-08-22 | éä¿ç¿° | äžç§é«èœ¬é湿æ³åªåé ç²æº |
CN115301155A (zh) * | 2022-09-05 | 2022-11-08 | æ¹å人çŒå å»è¯çç©å·¥çšæéå ¬åž | äžç§é溶é¢ç²çå¶å€æ¹æ³åè£ çœ® |
CN115301155B (zh) * | 2022-09-05 | 2023-09-15 | æ¹å人çŒå å»è¯çç©å·¥çšæéå ¬åž | äžç§é溶é¢ç²çå¶å€æ¹æ³åè£ çœ® |
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WO2001068232A8 (en) | 2001-12-20 |
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