JP5173977B2 - Agitation granulator - Google Patents

Description

  The present invention relates to an agitation granulator that performs at least one of an agitation process and a granulation process.

  Conventionally, an agitation granulator that granulates by rotating an agitator blade along the bottom wall of an agitation tank is known (Patent Document 1 below). With such an agitation granulator, the powder charged in the agitation tank can be rolled and granulated to produce homogeneous particles.

JP-A-10-314572 “Agitating granulator and impeller thereof”

However, the specific gravity of the particles produced by the stirring granulator is about 0.9 to 0.8 and are hard particles. When used as tableting particles, the particles produced by the stirring granulator are used. It was necessary to use after crushing with a crushing device, and there was a problem that labor and manufacturing cost increased.
Also, with the agitation granulator using the agitator blade, there is a problem that the state of granulation cannot be controlled with high accuracy according to the purpose because the shape of the blade in the central region is constant and the peripheral speed is small. It was.
Furthermore, if it is the said stirring granulation apparatus, the subject that the quantity of the granular material which cannot be taken out from a stirring tank generate | occur | produces about 5% of the whole occurred.

This invention is made | formed in view of the said subject, and the objective of this invention is providing the stirring granulation apparatus which can solve the said subject.
An example of a specific purpose is as follows.
(A) Granulation with a specific gravity of about 0.7 to 0.6 can be realized while the central region of the stirring tank and the powder near the bottom wall can be controlled well.
(B) Provided is an agitation granulator that can easily control the granulation condition to a desired condition as compared with conventional granulation using an agitator blade.
In addition, the subject of invention other than having described above, its solution means, and its effect are demonstrated in detail in description in the specification mentioned later.

Although the present invention can be expressed in many ways, for example, typical ones are configured as follows. In each of the following inventions, each symbol is shown as an example for easy understanding of the correspondence with the embodiment described later, and each component of the present invention corresponds to the configuration related to the symbol described in the embodiment. It goes without saying that it is not limited.
In this specification, “powder” is used in a concept including a powder material and a granular material.
The agitation granulator of the first invention comprises a chopper rotating shaft 5 provided so as to protrude from below at the center of the bottom wall 4 of the stirring tank 2, and a scraper rotating shaft 6 concentric with the chopper rotating shaft 5. The swirl flow generating blade 14 having a chopper function is attached to the chopper rotating shaft 5, and the scraper blade 9 is attached to the scraper rotating shaft 6.
The scraper blade 9 has a radially extending radial portion 10 that rotates in proximity to or in contact with the bottom wall 4 of the stirring vessel 2, and extends upward from the end of the radial portion 10 to extend the inner peripheral wall 11 of the stirring vessel 2. A scraping portion 12 that is close to or in contact with the inner peripheral wall. The scraping portion 12 feeds the powder on the inner peripheral wall 11 side to the central region of the agitation tank 2 and disperses and disintegrates the swirl flow generating blades 14. Configured to function to send the powder in the central region of the stirring tank 2 to the inner peripheral wall 11 side by the rotation of the radius portion 10,
The spiral flow generating blade 14 is composed of an end warped blade 17 whose outer end region is bent upward, and the end warped blade 17 is attached to the upper side of the chopper rotating shaft 5, and the end warped surface thereof. A crushing blade 15 is attached to the lower side of the blade 17,
The crushing blade 15 is composed of a dissolver blade 18 having a cutting surface for crushing.
If it is 1st invention, a spiral flow production | generation blade | wing will exhibit the function to generate | occur | produce a spiral airflow in the center area of a stirring tank, and to disperse | distribute and crush by a chopper function. In addition, the powder that is pressed and adhered to the periphery of the inner peripheral wall by the scraping part of the scraper blade is returned to the inside of the stirring tank so that the spiral airflow is constantly supplied with new powder and homogenized. Can be achieved. Further, the powder in the central region is pushed out to the inner peripheral wall by the action of the radius portion and can flow smoothly in the stirring tank without staying in the central region. Further, the rolling action on the bottom wall by the agitator blade as in the prior art is small, it is easy to be broken by the crushing action in the spiral flow in the central region, and good granulation with low specific gravity can be obtained.
Moreover, the flow of the powder swirling like a tornado in the vertical direction in the stirring tank can be created by the end warped blade. In addition, by crushing the powder that has flowed into the central area with a crushing blade, the surface irregularities can be increased and the density of the powder can be reduced to granulate, making it easy to melt and compress Formability can be improved when processing is performed.
Furthermore, it is possible to increase the unevenness of the surface, to lower the density of the powder and to dissolve easily, and to enhance the effect of improving the moldability when a tableting process is performed.

The agitation granulator of the second invention comprises a chopper rotating shaft 5 provided so as to protrude from below at the center of the bottom wall 4 of the agitating tank 2, and a scraper rotating shaft 6 concentric with the chopper rotating shaft 5. The chopper rotating shaft 5 is attached with a spiral flow generating blade 14 and a disc blade 19 having a chopper function, and the scraper rotating shaft 6 is attached with a scraper blade 9.
The scraper blade 9 has a radially extending radial portion 10 that rotates in proximity to or in contact with the bottom wall 4 of the stirring vessel 2, and extends upward from the end of the radial portion 10 to extend the inner peripheral wall 11 of the stirring vessel 2. A scraping portion 12 that is close to or in contact with the inner peripheral wall 11, and the scraping portion 12 feeds the powder on the inner peripheral wall 11 side to the central region of the stirring vessel 2, and disperses and disintegrates it by the rotating swirl flow generating blade 14. Configured to
Further, the disk blade 19 is provided above the radius portion 10 of the scraper blade 9 in the agitation tank 2, and the powder in the central region is sent to the inner peripheral wall 11 side by the rotation of the disk blade 19. It is characterized by that.
If it is 2nd invention, the disk blade | wing can rotate and the function which sends out the powder of a center area reliably to the inner peripheral wall side can be exhibited, and favorable mixing or granulation can be implement | achieved in a short time.

The third invention is characterized in that, in each of the above inventions, the direction of rotation of the scraper blade 9 is set in a direction opposite to the spiral flow generating blade 14.
According to the third aspect of the invention, by setting the rotation direction of the scraper blade and the rotation direction of the swirl flow generating blade to be opposite directions, the powder flowing into the swirl of the central region by the scraping portion is affected by the swirl flow generating blade. Since it becomes easy, the function of dispersion | distribution and crushing can be improved and the quality of granulation can be improved.

4th invention is the above-mentioned each invention, The peripheral speed of the said scraper blade | wing 9 is 0.1 m / second-
It is set to 1 m / sec, and the peripheral velocity of the spiral flow generating blade 14 is set to 5 m / sec to 30 m / sec.
According to the fourth invention, by setting the peripheral speed within the above range, the balance between the flow of the powder in the circumferential direction in the stirring tank and the vortex flow in the vertical direction can be improved, and the quality of the produced granulation can be improved.

In a fifth aspect of the present invention, there is provided a reverse chopper rotation shaft 26 that rotates in a direction opposite to the chopper rotation shaft 5 in each of the above-mentioned inventions, and the swirl flow generation blade 14 has an end warped surface blade whose outer end region is bent upward. 17, the end warped blade 17 is attached to the upper side of the chopper rotating shaft 5, and the first crushing blade 28 is attached to the lower side of the end warped blade 17. The 2nd crushing blade | wing 29 is attached, the 1st crushing blade | wing 28 and the 2nd crushing blade | wing 29 are each provided with the protrusion 31 for crushing, and these protrusions 31 for crushing rotate in a staggered state in the up-down direction. It is comprised as follows.
If it is 5th invention, since it is comprised so that the protrusion for crushing of the 1st crushing blade and the 2nd crushing blade may rotate in the opposite direction in a staggered state, the relative speed of the crushing protrusion is very Therefore, the powder that has entered the protrusions for crushing is efficiently crushed. Therefore, it can be suitably used for applications that require highly functional mixing and dispersion.
The crushing protrusion can be a bar erected in the vertical direction.

According to a sixth aspect of the present invention, in the above inventions, the length of the scraping portion 12 in the vertical direction is set to a length corresponding to the circumferential wall 11 of the stirring tank 2, and a portion of the inner circumferential wall 11 is used for removal. An opening / closing opening 33 is formed.
If it is 6th invention, the granular material inside a stirring tank, etc. can be taken out so that there may be almost no residual amount.

  Hereinafter, if it is this invention, the granulation which can control the powder near the center part area and bottom wall of a stirring tank favorably, and specific gravity shall be about 0.7-0.6 is realizable. Moreover, compared with the granulation using the conventional agitator blade | wing, the stirring granulation apparatus which is easy to control granulation conditions to desired conditions can be provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 (A) is a longitudinal sectional view of a stirring granulator according to the present embodiment, FIG. 1 (B) is a cross-sectional view taken along the line BB of FIG. 1 (A), and FIG. 3 is a three-dimensional exploded view of the blade according to the present embodiment, FIG. 4 is a longitudinal sectional view for explaining the flow of powder by each blade, and FIG. 5 is a transverse sectional view for explaining the flow of powder by each blade. It is.
As shown in FIG. 1, the stirring tank 2 of the stirring granulator 1 has a circumferential wall 2 a in the upper half area formed in a conical taper shape, and a circumferential wall 2 b in the lower half area is formed by a circumferential wall 11. It is formed. An input port 3 is provided at the upper end of the stirring tank 2, and an openable / closable opening 33 is provided in a part of the circumferential wall 11. The manufactured powder (including the granular material) is taken out from the opening 33.
As shown in FIG. 1B, the stirring tank 2 is provided with a chopper rotating shaft 5 provided so as to protrude from below the bottom wall 4 and a scraper rotating shaft 6 concentric with the chopper rotating shaft 5.
The chopper rotating shaft 5 is connected to a chopper motor 7 that can rotate at high speed. In FIG. 1, the power of the chopper motor 7 is transmitted to the chopper rotating shaft 5 via the belt transmission device 41. However, the power of the chopper motor 7 is directly transmitted to the chopper rotating shaft 5 via the speed reducer. May be.

Further, a scraper motor 8 is provided, and the power of the scraper motor 8 is transmitted to the scraper rotating shaft 6 through a power transmission mechanism 35 such as a speed reducer 34 and a gear train to rotate the scraper blade 9.
The scraper blade 9 is close to or close to the radially extending radial portion 10 that rotates in the vicinity of or in contact with the bottom wall 4 of the stirring vessel 2 and the inner peripheral wall 11 of the stirring vessel 2 that extends upward from the end of the radial portion 10. It has a scraping portion 12 in contact therewith.
The scraping portion 12 of the scraper blade 9 has a function of scraping the powder pushed out to the center side again by the action of the radius portion 10 or a disk blade 19 described later.
As shown in FIG. 2, at least two scraped portions 12 are each provided with inclined surfaces 13 inclined at a predetermined inclination angle θ so as to contact the circumferential wall 11 of the stirring tank 2. Although not shown in FIGS. 1 to 3, the scraping portion 12 can adjust the contact pressure and the inclination angle θ by an adjustment mechanism (not shown).
In the configuration shown in this embodiment, there is shown a configuration in which two radial portions 10 extending in the diametrical direction are provided and a scraped portion 12 having an inclined surface 13 is erected on each radial portion 10. However, three or more radius portions 10 and scraping portions 12 can be provided, such as three at intervals of 120 degrees, four at intervals of 90 degrees, and so on.

At least a spiral flow generating blade 14 is detachably attached to the chopper rotating shaft 5. If necessary, the crushing blade 15 and the disc blade 19 are attached.
The spiral flow generating blade 14 is a blade that generates a spiral airflow in the central region of the stirring tank 2 when rotated. As the spiral flow generating blade 14, it is preferable to employ an end warped surface blade 17 in which the outer end region 16 is bent upward. As an example of the end warped blade 17, there is a blade whose longitudinal section shown in FIGS. 1 to 3 is substantially C-shaped.
Examples of the type of the spiral flow generating blade 14 include forms as shown in FIGS. FIGS. 6A, 6C, and 6E are plan views, and FIGS. 6B, 6D, and 6F are longitudinal sectional views thereof.

The spiral flow generating blades 14 shown in FIGS. 6A and 6B have four blades, and each blade includes a flat portion 36 parallel to the bottom surface and an end portion 37 bent upward. The end portion 37 is pointed in a triangular shape, and has a configuration in which the crushing effect in the end region is high.
The spiral flow generating blades 14 shown in FIGS. 6 (c) and 6 (d) have eight blades, and each blade has a curved plate portion 39 that is gently inclined upward from the support frame, and the effect of forming a tornado flow And the crushing effect of the tip area is high.
The spiral flow generating blades 14 shown in FIGS. 6 (e) and 6 (f) have four blades, and each blade has a three-dimensional blade having a wind-cut surface, a region where the end is raised, and a region where the end is lowered. This configuration has a high crushing effect.
The swirl flow generating blade 14 has a function of winding the powder in a spiral shape by forming a swirl flow and dispersing and crushing with a blade at the tip.

  The crushing blade 15 is a blade provided when the crushing function is not sufficient by the spiral flow generation blade 14. For example, the dissolver blade 18 as shown in FIGS. 7A and 7B has a jagged saw blade 40 at the peripheral end, and has a high action of crushing lumps formed during granulation. Further, by being crushed by the dissolver blade 18, the surface of the granulated body can be uneven, and there is an advantage that the formability can be improved during tableting.

  As shown in FIGS. 1 to 3, the chopper rotating shaft 5 is preferably provided with a disk blade 19. The disk blade 19 is attached to the chopper rotating shaft 5 so as to rotate immediately above the radius portion 10 of the scraper blade 9. The disk blade 19 is composed of a disk having substantially the same length as the radius portion 10 of the scraper blade 9, and an extrusion protrusion 20 is formed on the upper surface of the disk as necessary as shown in FIG. It is. Although various shapes of the extrusion protrusion 20 can be considered, it is preferably a protrusion extending from the center side of the disk toward the peripheral side. The disk blade 19 rotates to cause the granular material in the central region of the stirring tank 2 to flow toward the circumferential wall 11, and the particles dispersed and crushed by the spiral flow generating blade 14 or the crushing blade 15 are contained inside. The function of pushing out to the peripheral wall 11 can be greatly enhanced. Even in the case of a flat disk without the extrusion protrusion 20, the effect of extruding powder and the like is sufficiently greater than that of the structure without the disk blade 19.

As shown in FIG. 3, the disc blade 19, the crushing blade 15, and the spiral flow generating blade 14 are fixed to the chopper rotating shaft 5 in order from the lower side, and then a conical cap portion 21 is attached to the upper wall of the chopper rotating shaft 5. Install.
In the normal granulation process, the swirl flow generating blade 14 is rotated at a high speed of 5 m / second to 30 m / second, and the scraping portion 12 of the scraper blade 9 is 0.1 m / second in the direction opposite to the rotation direction of the swirl flow generating blade 14. Rotate at a low speed of 1 to 1 m / sec.
The speed of the conventional agitator blade is about 5 m / second to 12 m / second.

The operation of the stirring granulator having the above configuration will be described.
First, a plurality of powders are put into the stirring tank 2 and mixed and dispersed. After the powder is sufficiently mixed, moisture is dropped to perform granulation. Here, as shown in FIG. 4 and FIG. 5, the granular material which is pushed and adhered to the periphery of the inner peripheral wall 11 by the rotation of the scraping portion 12 of the scraper blade 9 is returned to the inside of the stirring tank 2 so as to be scraped. A granular flow 22 returning from the inner peripheral wall 11 to the central region is formed. Further, as shown in FIGS. 4 and 5, the flow of the granular material 23 from the central region toward the inner peripheral wall 11 is provided in the lower region of the stirring tank 2 by the pushing action of the granular material toward the inner peripheral wall 11 by the disc blade 19. Occurs. By these two flows 22 and 23, the granular material in the central region is repeatedly circulated in the stirring tank 2.

On the other hand, in the central region, the end warp surface blade 17 as the spiral flow generating blade 14 rotates at a high speed, so that the washing machine has a spiral (tornado) in the central region of the stirring tank 2 as shown in FIG. Air current 24 is generated. Then, the scraper blades 9 are scraped out and rotated so as to entrain the granular flow 22 toward the central region into the spiral 24 to perform dispersion and crushing.
Further, the crushing blade 15 also crushes the lumps rotated by the spiral 24 to uniform the particle diameter. The crushing of lumps by contact with the crushing blades 15 has a crushing cross section and a gap. In addition, when the dissolver blade 18 is used as the crushing blade 15, the surface of the granular material is clogged even during crushing and aligning the particle size because it has a jagged cutting surface like a saw blade. It is not hard and uniform, and it can be promoted to be relatively soft and to have large irregularities with fine holes on the surface.

If it is such a granular material, it can have good meltability even if it is dissolved in water as it is. Moreover, since the density is as low as about 0.7 to 0.6, it can be used as a tableting particle as it is, and the formability after tableting is very good. Tableting can be performed directly without crushing.
On the other hand, with a conventional agitation granulator using agitator blades, rolling agglomeration with agitator blades is performed on the bottom wall of the agitation tank. During the course, the granule is struck many times against the bottom wall and pressure is applied, so that the formed granule becomes hard. Moreover, the surface gaps are small and the surface irregularities are small particles. As a result, the density is increased to about 0.8 to 0.9.

FIG. 10 shows a blade configuration shown in FIG. 3 for stirring and mixing lactic acid (200M), corn starch, and HPC-L powder (for binder) as ingredients in the stirring tank 2 by granulation according to a standard pharmaceutical formulation, and making granules. It is the photograph which image | photographed the granular body which put the purified water of 100% by weight, and dripped 100 weight% with respect to the powder, and completed granulation with the electron microscope. Similarly, FIG. 11 is a photograph of a granular material completed by dropping 120% by weight of water under the same conditions.
FIG. 12 is a photograph of a granule completed by rolling granulation using the same material with a conventional agitator blade attached to the same stirring tank 2, taken with an electron microscope. Similarly, FIG. 13 is a photograph of a granular material completed by dripping 120% by weight of water under the same conditions.
As can be seen by comparing FIGS. 10 and 12 and FIGS. 11 and 13, it can be seen that the granular material using the configuration according to the present embodiment has many gaps and the surface is not uniform and the surface is uneven. Actually, the density was about 0.7 to 0.6, and it was proved to be a granule very suitable for tableting.

Even if the disk blade 19 is not provided, since the radius portion 10 is provided to rotate in proximity to or in contact with the bottom wall 4, the powder staying in a portion near the bottom wall 4 is allowed to remain in the inner peripheral wall 11. It can extrude to the side, and can give the target effect | actions, such as mixing dispersion | distribution and granulation, suitably. This is because when the radius portion 10 rotates near the bottom wall 4, powder that tends to stay in the central region can be sent out to the flip-up portion 12 side by the action of centrifugal force.
Furthermore, the volume of the granular material that cannot be taken out from the stirring tank 2 with a conventional stirring granulator was about 5% of the total volume, whereas the apparatus according to this embodiment has a capacity of 1%. There is an advantage that can be suppressed to a degree. This is because the length of the scraping portion 12 in the vertical direction is set to a length corresponding to the circumferential wall 11 of the stirring tank 2, so that almost all of the granular material on the inner circumferential wall 11 can be sent to the opening 33. Because.

Further, since the swirl flow generating blade 14, the crushing blade 15, the disk blade 19 and the scraper blade 9 are all protruded from below the bottom wall 4 of the stirring tank 2, an elevating device for entering the blade from above is not required. The space around the device can be used effectively and the manufacturing cost can be reduced.
Furthermore, since the swirl flow generating blade 14, the crushing blade 15, the disk blade 19 and the scraper blade 9 are inserted into the stirring tank 2 from the same direction, the combination of the support frames 38 of each blade is unitized for each application. This also has the advantage of being easy to carry out stirring and granulation operations.

(Second Embodiment)
FIG. 8 is a longitudinal sectional view of an agitation granulator for explaining a second embodiment of the present invention, and FIG. 9 is a diagram showing a state of planar arrangement of crushing projections.
The agitation granulator 1 includes a chopper rotating shaft 5 located at the center, a reverse chopper rotating shaft 26 concentrically located outside the chopper rotating shaft 5, and a concentric outside located near the reverse chopper rotating shaft 26. A scraper rotating shaft 6 is provided. Then, the swirl flow generating blade 14 and the first crushing blade 28 are attached to the chopper rotating shaft 5, the second crushing blade 29 is attached to the reverse chopper rotating shaft 26, and the scraper blade 9 is attached to the scraper rotating shaft 6. It has become.
Below the stirring tank 2 of the stirring granulator 1, a chopper motor 7 that drives the chopper rotating shaft 5, a transmission mechanism 42 that transmits the chopper motor 7 to the reverse chopper rotating shaft 26 while reversing the rotating direction of the chopper motor 7, and a scraper. A scraper motor 8 for driving the rotary shaft 6 is provided. Instead of the transmission mechanism 42, a reverse chopper motor (not shown) may be provided independently.
The rotating direction of each rotating shaft is driven so that only the reverse chopper rotating shaft 26 is different from the rotating directions of the other two rotating shafts 5 and 6.

  The first crushing blade 28 is provided with a crushing protrusion 31 on a base 43 that extends in the radial direction. On the contrary, the second crushing blade 29 includes a crushing protrusion 31 on a base 43 having a predetermined shape. Each of the crushing projections 31 is arranged so that the projections are uneven in the first crushing blade 28 and the second crushing blade 29. In the configuration shown in FIG. 8 and FIG. 9, the crushing projections 31 are arranged in the radial direction and are configured by a plurality of bar members 32 that are alternately erected downward or upward so as not to interfere with each other. In FIG. 9, the base 43 is shown in a disc shape, and the disc is provided with an opening 44 for passing powder. The base body 43 can also be constituted by a long plate extending in the diameter direction. An air seal mechanism 45 is provided on the bottom wall of the agitation tank 2.

The operation of the apparatus having the above configuration will be briefly described.
The agitation granulator 1 according to this embodiment can be suitably used when producing fine particles such as a foundation. With a conventional agitation granulator, a single agitation granulator 1 can perform a foundation manufacturing operation that requires the use of a pulverizer after granulation.
Since the position of the base body 43 on which the bar 32 is disposed is provided on the scraping blade 12 side of the scraper 12, the rotational speed is high, and the crushing projections 31 are passed at high speeds at narrow intervals, so that the crushing effect is remarkably achieved. Can be increased. Further, since the crushing projections 31 pass each other in a region where there are many granular materials scraped to the inside by the scraping portion 12, the effect is increased.
Furthermore, the advantage that the volume of the granular material that cannot be taken out from the stirring tank 2 can be suppressed to about 1% is the effect that the material is not wasted and the use for making multi-colored granular material such as a foundation. Considering the cleaning effort, this is a significant advantage.

The present invention is not limited to the configuration of the above embodiment, and various modifications can be made within the scope of the gist of the present invention.
For example, in the first embodiment, the crushing blade 15 and the disc blade 19 are provided in addition to the swirl flow generation blade 14, but the disc blade 19 is omitted and a saw blade is provided at the tip of the swirl flow generation blade 14. It is also possible to substitute with. However, the performance is better in the first embodiment.
A plurality of crushing blades 15 of about 2 to 4 may be attached to the chopper rotating shaft 5. However, the swirl flow generating blade 14 is necessary.
A disk blade rotation shaft for driving the disk blade 19 may be provided, and the disk blade rotation shaft may be configured to be freely rotatable independently of the chopper rotation shaft 5 and the scraper rotation shaft 6. With this configuration, the disc blade 19 can be controlled independently regardless of the rotation direction and the number of rotations of the scraper blade 9 or the swirl flow generating blade 14 and can be precisely controlled.
Further, as the crushing blade 15, various known blades other than the dissolver blade 18 can be used.

FIG. 1A is a longitudinal sectional view of a stirring granulator according to the present embodiment, and FIG. 1B is a transverse sectional view taken along line BB of FIG. FIG. 2 is a schematic cross-sectional view of a stirring granulator. FIG. 3 is a three-dimensional exploded view of the blade according to the present embodiment. FIG. 4 is a longitudinal sectional view for explaining the flow of powder by each blade. FIG. 5 is a cross-sectional view for explaining the flow of powder by each blade. FIGS. 6A to 6F are diagrams showing examples of spiral flow generating blades. FIG. 7A is a plan view of a dissolver blade, and FIG. 7B is a side view thereof. FIG. 8 is a longitudinal sectional view of the agitation granulator according to this embodiment. FIG. 9 is a plan view of the crushing blade. FIG. 10 is an electron micrograph of the granular material produced according to this embodiment. FIG. 11 is an electron micrograph of the granular material produced according to this embodiment. FIG. 12 is an electron micrograph of a granular material produced by a production method using a conventional agitator blade. FIG. 13 is an electron micrograph of a granular material produced by a conventional method using agitator blades.

  DESCRIPTION OF SYMBOLS 1 ... Stirring granulator, 2 ... Stirring tank, 4 ... Bottom wall of stirring tank, 5 ... Chopper rotating shaft, 6 ... Scraper rotating shaft, 9 ... Scraper blade, 10 ... Radius part, 11 ... Inner peripheral wall of stirring tank, DESCRIPTION OF SYMBOLS 12 ... Scraping part, 14 ... Swirl flow production | generation blade | wing, 17 ... End part curvature surface blade | wing, 18 ... Dissolver blade | wing, 19 ... Disc blade | wing, 26 ... Reverse chopper rotating shaft, 28 ... 1st crushing blade | wing, 29 ... 2nd solution Crushing blades, 32 ... projections for crushing, 33 ... openings.

Claims (6)

A chopper rotating shaft (5) provided at the center of the bottom wall (4) of the stirring tank (2) so as to protrude from below, and a scraper rotating shaft (6) concentric with the chopper rotating shaft (5). A spiral flow generating blade (14) having a chopper function is attached to the chopper rotating shaft (5), and a scraper blade (9) is attached to the scraper rotating shaft (6),
The scraper blade (9) has a radially extending radial portion (10) that rotates in proximity to or in contact with the bottom wall (4) of the stirring vessel (2), and upward from the end of the radial portion (10). A scraping portion (12) extending and contacting or contacting the inner peripheral wall (11) of the stirring vessel (2), and the scraping portion (12) allows the powder on the inner peripheral wall (11) side to be mixed with the stirring bath (12). 2) It is configured to be sent to the central region and dispersed and crushed by the swirl flow generating blade (14), and the powder in the central region of the stirring tank (2) by the rotation of the radius portion (10) Function to send to the inner peripheral wall (11) side,
The spiral flow generating blade (14) is configured by an end warped blade (17) whose outer end region is bent upward, and the end warped blade (17) is disposed above the chopper rotating shaft (5). Mounting, attaching the crushing blade (15) to the lower side of the end warped blade (17),
An agitation granulator characterized in that the crushing blade (15) comprises a dissolver blade (18) having a cutting surface for crushing. A chopper rotating shaft (5) provided at the center of the bottom wall (4) of the stirring tank (2) so as to protrude from below, and a scraper rotating shaft (6) concentric with the chopper rotating shaft (5). The swirl flow generating blade (14) having a chopper function and the disc blade (19) are attached to the chopper rotation shaft (5), and the scraper blade (9) is attached to the scraper rotation shaft (6).
The scraper blade (9) has a radially extending radial portion (10) that rotates in proximity to or in contact with the bottom wall (4) of the stirring vessel (2), and upward from the end of the radial portion (10). A scraping portion (12) extending and contacting or contacting the inner peripheral wall (11) of the stirring vessel (2), and the scraping portion (12) allows the powder on the inner peripheral wall (11) side to be mixed with the stirring bath (12). 2) It is configured to be dispersed and crushed by the spiral flow generating blades (14) that are sent to the central region and rotated.
Further, the disk blade (19) is provided in the stirring tank (2) above the radius portion (10) of the scraper blade (9), and the powder in the central region is transferred to the disk blade (19). The agitation granulator is characterized in that it is fed to the inner peripheral wall (11) side by the rotation of.   The stirring granulation apparatus according to claim 1 or 2, wherein a rotation direction of the scraper blade (9) is set in a direction opposite to the spiral flow generation blade (14).   The stirring granulation apparatus according to claim 3, wherein the peripheral speed of the scraper blade (9) is set to 0.1 m / second to 1 m / second, and the peripheral speed of the spiral flow generating blade (14) is set to 5 m / second. Agitation granulator set to -30 m / sec.   The agitation granulator according to claim 1, wherein a reverse chopper rotation shaft (26) rotating in a direction opposite to the chopper rotation shaft (5) is provided, and the spiral flow generating blade (14) is located above an outer end region. The end warped blade (17) is bent to the upper side of the chopper rotating shaft (5), and the end warped blade (17) is attached to the lower side of the end warped blade (17). A first crushing blade (28) is attached, a second crushing blade (29) is attached to the reverse chopper rotating shaft (26), and the first crushing blade (28) and the second crushing blade (29) are respectively An agitation granulator provided with crushing projections (31) and configured so that the crushing projections (31) rotate in a staggered state in the vertical direction.   The stirring granulation apparatus according to any one of claims 1 to 5, wherein the length of the scraped portion (12) corresponds to the circumferential wall (11) of the stirring tank (2). An agitation granulator which is set to a length and has an opening / closing opening (33) for taking out in a part of the inner peripheral wall (11).