JPH06187B2 - Granule processing method and device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method and apparatus for treating powder and granules, and more particularly to powder and granules for carrying out treatments such as granulation, coating, drying and mixing of powder and granules in a fluidized bed type processing chamber. A body processing method and apparatus.

[Background Art] Generally, as a fluidized bed type granular material treatment technology, a gas method is jetted from below a fluidized bed consisting of a fixed perforated plate to fluidize the granular material in the treatment chamber to form a binder solution. Has proposed a method of agglomerating powder particles.

However, in this conventional technique, the granules are granulated only by being brought into a fluidized state only by the action of the jetted gas flow, so the granulated product is light and has an irregular shape, and the particle size distribution varies widely. I have a problem.

Therefore, it is proposed that the fluidized bed in the processing chamber is a rotating plate, and the rotation of this rotating plate and the gas flow from the lower method give centrifugal rolling and swirling action to the granular material to produce a uniform granulated product. (For example, see Japanese Patent Laid-Open No. 59-55337).

According to this conventional technique, an excellent effect such as the production of a uniform granulated product having a desired particle size can be obtained, but only one rotating plate is provided, and powder on the rotating plate is used. The force to move the particles in the radial direction is given by the rotation of the rotating plate. Therefore, if the centrifugal rolling of the granular material on the rotating plate and the pressing force of the granular material against the inner wall of the processing chamber is insufficient, it may not be possible to obtain a desired heavy granulated product. obtain.

[Object of the Invention]

It is an object of the present invention to provide a method and an apparatus for treating powder and granules, which makes it possible to obtain a heavy and uniform product.

Another object of the present invention is to provide a method and apparatus for treating powder and granules, which can improve the treatment efficiency such as granulation, coating and drying.

Still another object of the present invention is to easily clean the inside of the processing chamber,
An object of the present invention is to provide a method and an apparatus for treating powder and granules, which can obtain a clean product without cross contamination.

[Outline of Invention]

According to the present invention, a plurality of rotating plates are rotated in a fluidized bed type granular material processing chamber, and a gas flow outward in the radial direction is ejected from the rotating shaft side of the rotating plates into a vertical gap between the angular rotating plates. Then, by rotating the rotating plate to rotate the particles in the direction of the inner wall of the processing chamber at the same time, by pressing the particles against the inner wall of the processing chamber, a heavy product can be obtained. Moreover, the processing efficiency can be improved.

[Embodiment 1] FIG. 1 is an overall schematic cross-sectional view of a powdery or granular material processing apparatus according to an embodiment of the present invention, and FIG. 2 is an enlarged partial cross-sectional view of a main part thereof.

In the present Example 1, the powder and granular material processing apparatus was used to granulate the powder and granular materials,
It has a structure in which an upright cylindrical processing container 1 for performing processing such as coating, mixing, and drying is erected on a base 2. A processing chamber 3 which forms a flow chamber is provided in the processing container 1 as described later. A raw material inlet 4 for supplying the raw material for the granular material is attached to the side surface of the processing chamber 3.

A hollow rotary shaft 5 is vertically provided at the center of the bottom of the processing chamber 3, and the rotary shaft 5 is rotated by a motor 6 via a belt 7. On the upper part of the rotary shaft 5,
A plurality of disc-shaped rotary plates 8 are arranged in a stack in the vertical direction with a predetermined gap therebetween. That is, the lowermost rotary plate 8 is held on the rotary shaft 5 by the retaining ring 9, and the rotary plate 9 positioned next to the rotary shaft 5 is separated from the lower rotary plate 8 by the height of the ventilation ring 10 functioning as a spacer. It is separated. The number of the rotary plates 8 in this embodiment is 5, and 3 from the bottom.
The rotary plates 8 on the upper side of the first sheet are also arranged in a multi-layered structure with the ventilation ring 10 interposed therebetween as in the above. The rotating plate 8 rolls powder particles on the upper surface thereof by centrifugal action or the like, and is configured such that the diameter gradually decreases from the lowermost part to the uppermost part. The uppermost rotary plate 8 is configured to be fixed by screwing a cap 11 onto the rotary shaft 5. The rotating plate 8 and the ventilation ring 10
Can be easily and detachably assembled by sequentially and alternately fitting the rotary shaft 5 with the cap 11 removed. Therefore, the rotary plate 8 and the ventilation ring 10
When cleaning, the cap 11 can be easily removed and individually cleaned by removing it from the rotary shaft 5 after removing the cap 11.
As described above, with the detachable structure, the rotary plate 8 and the ventilation ring 10 of the present embodiment can maintain high cleanliness, and the inside of the processing chamber 3 can be kept clean.

The rotary shaft 5 has a hollow shaft structure, and an air supply hole 12 is formed in an axial direction inside the rotary shaft 5, and the air supply hole 12 is provided with a radial gas ejection hole 13 provided in an upper portion of the rotation shaft 5 and the gas ejection hole. A gas jet hole 14 is provided in the ventilation ring 10 so as to be communicated with the ventilation ring 10. Therefore, the air supply holes 12 are provided between the angular rotary plates 8.
The gas supplied from through the gas ejection holes 13 and 14 is ejected toward the outer side in the radial direction. The uppermost rotary plate 9 is provided with a cap 11 so as to communicate with the air supply hole 12.
Gas is ejected to the outside in the radial direction from the gas ejection holes 15 in the radial direction provided in In this embodiment, the gas to the air supply hole 12 is supplied from the blower 16 via the valve 17.

On the other hand, below the rotary plate 8 at the bottom of the processing chamber 3,
Gas for fluidization is supplied from the blower 16 through the barva 18. This fluidizing gas is an annular space 1 between the periphery of the lowermost rotary plate 8 and the inner wall of the processing container 1.
It is supplied into the processing chamber 3 through 9 and fluidizes the granular material.

The supply amount and the supply timing of the fluidizing gas supplied below the rotary plate 9 and the gas supplied to the air supply hole 12 of the rotary shaft 5 are determined by the amount and timing of opening and closing of the barbers 17 and 18. It is adjusted by controlling. However, these quantity gases may be supplied from different supply sources in different systems.

A discharge mechanism 20 for taking out the product is provided on the side surface of the processing container 1 at the same height as the lowermost rotary plate 8.

Further, in the processing chamber 3 on the side of the rotary plate 8, a crushing mechanism 21 for crushing the powder particles during processing to obtain a spherical product having a high bulk density, and a coating liquid or a binder. A spray device 22 such as a two-fluid spray gun structure for spraying liquid is provided. A spray device 23 having a two-fluid spray gun structure above the rotary plate 8.
Can be provided.

Further, on the upper part of the processing container 1, a bag filter 24 for collecting fine powders entrained in the gas flow, a lid 25 for explosive diffusion,
Further, an exhaust duct 26 for discharging the exhaust to the outside of the system is provided.

The operation of this embodiment will be described below.

First, when the raw material powder is introduced into the processing chamber 3 from the raw material inlet 4, for example, the gas from the blower 16 is rotated through the valve 18 so that the granular material does not leak from the annular space 19 as necessary. The powdery or granular material is charged while being supplied below the plate 8.

Next, the valve 17 is opened, the gas from the blower 16 is ejected from the air supply hole 12 of the rotary shaft 5 to the outside in the radial direction through the gas ejection holes 13, 14 and 15, and the motor 6 rotates the belt through the belt 7 to rotate the rotary shaft. 5 and rotating plate 8 and also valve 1
8 is further opened to supply the fluidizing gas into the processing chamber 3 from the annular space 19. Further, a coating liquid or a binder liquid is supplied into the processing chamber 3 from one or both of the spray devices 22 and 23, and the unraveling mechanism 21 is operated as necessary.

Therefore, the granular material is fluidized by the gas flow from the annular space 19, and the rotation of the rotary plates 8 causes the granular material on each rotary plate 8 to undergo centrifugal rolling operation and roll. In addition to the above, the powdery granular material is subjected to a radially outward force by the gas flow from the gas ejection holes 13, 14, 15 and is pressed toward the inner wall surface of the processing container 1, so that it is outwardly in the radial direction. With the power of, heavy products can be obtained.

In addition to the centrifugal rolling motion due to the rotation of the rotary plate 8, the powder and granules are subjected to the action of the gas flow outward in the radial direction, so that the action such as rolling and dispersion is promoted, so that the powder is evenly distributed. In addition to obtaining a spherical product having a particle size, the treatment efficiency can be improved by, for example, improving the drawing speed of the film of the coating liquid or the drying speed.

The product manufactured in this way is taken out to the outside by the opening of the discharge mechanism 20 and collected.

[Embodiment 2] FIG. 3 is an enlarged partial sectional view showing an essential part of another embodiment of the present invention.

The second embodiment has a structure in which the rotary shaft 5 extends from the upper side to the lower side, and a plurality of rotary plates 8 and the ventilation ring 10 are detachably assembled in multiple layers by screwing a cap 11 on the lower end.

Also in the case of the second embodiment, due to the centrifugal force due to the rotation of the rotary plate 8 and the force of the gas flow radially outward of the rotary shaft 5,
It is possible to efficiently manufacture heavy products.

[Embodiment 3] FIG. 4 is an enlarged partial sectional view showing still another embodiment of the present invention.

In the third embodiment, instead of the ventilation ring 10 with the gas ejection holes 14 in the first embodiment, a ventilation ring 10a made of a porous permeable substance is used. The ventilation ring 10a has a diameter larger than that of the ventilation ring 10 and has a diameter substantially close to the diameter of the rotary plate 8 separated by each ventilation ring 10a. Therefore, the ventilation ring 10a is fixed by fitting the upper end of the ventilation ring 10a into the annular groove 27 on the back surface of each rotary plate 8 so that the axis of the rotary plate 8 does not shift due to the rotation of the rotary plate 8.

Also in the case of the third embodiment, a heavy product can be efficiently obtained, and the plurality of rotary plates 8 and the ventilation ring 10a can be easily assembled and disassembled easily by simply removing the cap 11. Since the cleanability is good, the cleanliness can be kept good and hygienic treatment can be performed for a long period of time.

[Embodiment 4] FIG. 5 is an enlarged partial sectional view showing still another embodiment of the present invention.

In the fourth embodiment, the rotary shaft 5 is composed of a solid shaft 5a and a hollow shaft 5b, and an air supply passage 12a is formed between the shafts 5a and 5b.

In this case, the gas flow ejected from the air supply passage 12a through the gas ejection holes 13 flows radially outward between or above the rotary plates 8 and directly through the ventilation ring 10a or the uppermost rotary plate 8. Is ejected radially outward.

Also in this embodiment, it is possible to efficiently produce a heavy product,
Moreover, hygienic processing is possible because the assembly and disassembly can be done easily and detachably.

It should be noted that this embodiment is not limited to the above embodiment, and various other modifications are possible.

For example, the shape of the processing container can be substantially spherical as shown by 1a in FIG.

Further, the diameter of the ventilation ring or the rotary plate, the number of rotary plates, and the like can be appropriately selected.

Further, the rotary plate can be fixed to the rotary shaft at predetermined intervals.

Further, the gas ejection holes may be formed in the tangential direction of the ventilation ring.

〔effect〕

(1). The centrifugal force is generated by the rotation of a plurality of rotating plates, and by the action of the gas flow ejected outward in the radial direction from the interval between the rotating plates, the particles are directed toward the inner wall of the processing chamber. Since it is pressed, a heavy product can be obtained.

(2) The treatment efficiency of the granulation, coating, mixing, or drying of the powder or granules can be improved by the action of the gas flow outward in the radial direction.

(3). Rotating plates and breathable annular members that vertically separate the rotating plates from each other are detachably arranged alternately so that they can be easily disassembled and washed, and high cleanliness can be maintained. Therefore, it becomes possible to perform extremely hygienic treatment without causing cross-contamination, which is very advantageous in so-called GMP (Good Manufacturing Practice) and is also beneficial in treating pharmaceuticals, foods, and the like.

[Brief description of drawings]

FIG. 1 is an overall schematic cross-sectional view of a powdery- or granular-material processing apparatus according to one embodiment of the present invention, and FIG. 2 is an enlarged partial cross-sectional view of a main part thereof.
FIG. 3 is an enlarged partial sectional view showing an essential part of another embodiment of the present invention, FIG. 4 is an enlarged partial sectional view showing another embodiment of the present invention, and FIG. 5 is still another embodiment of the present invention. It is an expanded partial sectional view showing an example. 1, 1a ... Processing container, 2 ... Base, 3 ... Processing chamber, 4 ... Raw material input port, 5 ... Rotating shaft, 5a ... Solid shaft, 5b ... Hollow shaft, 6 ... Motor, 7 ... Belt, 8 ... Rotating plate, 9 ... Retaining ring, 10 and 10a ... Ventilation ring, 11 ...・ Cup, 12 ... Air supply hole, 12a ... Air supply passage, 13, 14, 15 ... Gas ejection hole, 16 ... Blower, 17, 18 ... Valve, 19 ... · Annular space, 20 ··· Discharge mechanism, 21 ··· Crushing mechanism, 22, 23 · · Spray gun, 24 ··· Bag filter, 25 · · · Explosion diffusion cover, 26・ ・ ・ Exhaust duct, 27 ・ ・ ・ Ring groove.

Claims (4)

[Claims] 1. A plurality of rotating plates arranged at predetermined intervals in a vertical direction in a processing chamber for a fluidized bed type granular material, and the gap between the rotating plates. A gas flow to the outside in the radial direction, and the powder particles are processed while rolling on the rotation plate by the action of the rotation of the rotary plate and the gas flow to the outside in the radial direction between the rotary plates. A method for treating powder and granules, which comprises: 2. A fluidized bed type powdery or granular material processing chamber, a rotating shaft standing upright in the center of the processing chamber, and the rotating shaft, which is arranged perpendicularly to each other with a predetermined gap therebetween. A plurality of rotary plates, a gas jet hole formed in the rotary shaft itself or a hollow shaft around the rotary shaft to supply a gas flow radially outward to the gap between the rotary plates, and the rotary shaft. A powdery or granular material processing apparatus comprising: a driving means and a means for supplying a gas flow into the processing chamber from below the rotating plate. 3. The powdery or granular material processing apparatus according to claim 2, wherein the rotating plates are separated from each other by an air-permeable annular member. 4. The powdery or granular material processing apparatus according to claim 3, wherein the rotary plates and the air-permeable annular members are alternately arranged so as to be detachable from each other.