JP2023147473A - Granulator - Google Patents

Abstract

To provide a granulator capable of manufacturing granules having a larger specific gravity than conventional ones by using a treatment vessel extending laterally.SOLUTION: A granulator 1A manufactures granules by granulating wet powder. The granulator 1A includes: a cylindrical rotary vessel 2 extending laterally; a large number of blades 6 that rotate in the rotary vessel 2 and feed the wet powder toward one opening 2b in an axial direction of the rotary vessel while kneading and crushing the wet powder; and a roller 7 that rotates in the rotary vessel 2 and kneads the wet powder between the roller and an inner peripheral surface 2c of the rotary vessel 2.SELECTED DRAWING: Figure 1

Description

The present specification relates to a granulation apparatus for producing granules from wet powder.

Traditionally, in the fields of pharmaceuticals, chemicals, foods, etc., granules have been produced from wet powders, in which one type of powder is wetted, or multiple types of powders are mixed and wetted. ing. These powders have poor handling properties if they are in powder form, but the handling properties are improved by making them into granules.

Patent Document 1 discloses a granulation device (referred to as a "continuous stirring processing device" in Patent Document 1) that produces granules from wet powder. This granulation device includes a cylindrical processing container that extends laterally, and an agitator and a scraper that rotate within the processing container. The wet powder charged into the processing container is agitated, mixed, and crushed by an agitator and a scraper, and is sent toward one exit in the axial direction of the processing container. In this way, this granulation device produces granules from wet powder.

JP 2016-7571 Publication

The granulation device of Patent Document 1 uses an agitator and a scraper that rotate in a cylindrical processing container extending in the horizontal direction to agitate, mix, and crush wet powder. The specific gravity of granules obtained with such a continuous stirring granulator tends to be smaller than that of granules obtained with a batch-type stirring granulator.

The applicant's intention is to provide a granulation device that can produce granules with a higher specific gravity than conventional ones using a processing container that extends laterally.

The granulation device disclosed herein granulates wet powder to produce granules. This granulation device includes a cylindrical rotating container extending laterally, and a large number of particles rotating within the rotating container, kneading and crushing wet powder and sending it toward one opening in the axial direction of the rotating container. and a roller that rotates within the rotating container and kneads the wet powder with the inner peripheral surface of the rotating container.

This granulation device uses a processing container that extends laterally, and can produce granules with a higher specific gravity than in the past.

FIG. 1 is a longitudinal cross-sectional view of a granulation device according to one embodiment. FIG. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 is an enlarged view of the main part of FIG. FIG. 4 is a front sectional view taken along line IV-IV in FIG. 3. FIG. 5 is a front sectional view taken along line VV in FIG. 3. FIG. 6 is a partially enlarged view of a granulation device according to another embodiment. FIG. 7 is a front sectional view taken along VII-VII in FIG. 6. FIG. 8 is a partially enlarged view of a granulation device according to another embodiment.

Hereinafter, preferred embodiments will be described in detail with appropriate reference to the drawings.

A granulation device 1A is shown in FIGS. 1 and 2. This granulator 1A is a so-called continuous granulator that continuously produces granules from wet powder. Here, the average particle size of the powder (generally a mixture of multiple types of powder) used before wetting is, for example, from 30 μm to 70 μm. The average particle size of the granules to be granulated is, for example, 80 μm to 250 μm.

As shown in FIG. 2, the granulating device 1A includes a cylindrical rotating container 2 that extends laterally, and a frame 11 that rotatably supports the rotating container 2. The frame 11 includes a base 11a located on the side of the rotating container 2, and a pair of arms 11b and 11c protruding from the base 11a. The arms 11b and 11c rotatably support the rotating container 2 via bearings 21 and 22.

An electric motor 23 for rotating the rotating container 2 is attached to the base 11a of the frame 11. Bevel gears 24 and 25 are provided on the output shaft of the electric motor 23 and on the outer peripheral surface of the rotating container 2, respectively, and these bevel gears 24 and 25 mesh with each other.

The rotating container 2 has an inlet opening 2a and an outlet opening 2b. The inlet side opening 2a is formed at the inlet side end of the inner circumferential surface 2c of the rotating container 2, and the outlet side opening 2b is formed at the outlet side end of the inner circumferential surface 2c. In this granulator 1A, the inlet end of the inner circumferential surface 2c of the rotating container 2 protrudes radially inward, and the diameter of the inlet opening 2a is smaller than the diameter of the outlet opening 2b. That is, the inner circumferential surface 2c of the rotating container 2 is a cylindrical surface with a constant diameter D except for the inlet side end.

As shown in FIGS. 1 and 2, the granulating device 1A includes a stationary member 3 that fits into the inlet opening 2a of the rotating container 2, and a rotating shaft 4. The rotating shaft 4 extends in the axial direction of the rotating container 2. The rotating shaft 4 is arranged within the rotating container 2, as shown by the broken line in FIG.

The stationary member 3 is provided with a cylindrical supply hole 3 a that communicates with the inside of the rotating container 2 . A screw 5 is arranged within the supply hole 3a. In this granulator 1A, the supply hole 3a extends along the central axis 40 (see FIG. 3) of the rotary shaft 4, and the rotary shaft 4 is also arranged within the supply hole 3a. A screw 5 is attached to the rotating shaft 4.

As shown in FIGS. 1 and 2, a support 16 is fixed to the base 11a of the frame 11, and an electric motor 41 for rotating the rotating shaft 4 is attached to the support 16.

Further, a bearing 21 and a first closing member 12 that covers the inside thereof are fixed to the arm 11b of the frame 11, and a second closing member 13 that covers the bearing 22 and the inside thereof is fixed to the arm 11c. . In this granulating device 1A, the first closing member 12 is disc-shaped and is integrated with the stationary member 3. The second closing member 13 is annular and penetrates the rotary container 2 . Furthermore, a cover 15 is attached to the arms 11b and 11c of the frame 11 to cover the space between them.

Granules are produced from the wet powder in the rotary container 2 and are discharged from one axial opening, the outlet opening 2b. A chute 14 is attached to the second closing member 13 to guide the granules discharged from the outlet side opening 2b of the rotary container 2.

Next, the structure inside and around the rotating container 2 will be explained in detail with reference to FIGS. 3, 4, and 5.

In the granulator 1A, the central axis 20 of the rotating container 2 is parallel to the horizontal direction. However, the central axis 20 of the rotating container 2 may be inclined downward from the inlet side opening 2a toward the outlet side opening 2b, or may be inclined upward. By tilting the central axis 20 of the rotating container 2 in this manner, the residence time of the wet powder within the rotating container 2 can be adjusted. Although the inclination angle of the central axis 20 of the rotating container 2 that extends laterally is not particularly limited, the absolute value of the inclination angle that the central axis 20 makes with the horizontal plane is, for example, 15 degrees or less.

Furthermore, in the granulator 1A, the central axis 40 of the rotating shaft 4 is located below the central axis 20 of the rotating container 2. For example, the eccentricity e of the central axis 40 of the rotating shaft 4 with respect to the central axis 20 of the rotating container 2 is 1/6 to 1/12 of the diameter D of the inner peripheral surface 2c of the rotating container 2.

Furthermore, in the granulator 1A, the rotation direction of the rotary shaft 4 is the same as the rotation direction of the rotary container 2, and the rotation speed of the rotary shaft 4 is faster than the rotation speed of the rotary container 2. The rotational speed of the rotating shaft 4 is set so that the peripheral speed at the tip of the blade 6, which will be described later, is approximately 5 m/s to 13 m/s, and the rotational speed of the rotating container 2 is set such that the peripheral speed at the tip of the blade 6, which will be described later, is approximately 5 m/s to 13 m/s. The peripheral speed is set to be approximately 0.5 m/s to 1 m/s.

The stationary member 3 includes an eccentric portion 31 that fits into the inlet opening 2a of the rotary container 2, and a tube portion 32 located farther from the rotary container 2 than the eccentric portion 31. The above-mentioned supply hole 3a is provided across the eccentric portion 31 and the tube portion 32.

The outline of the eccentric portion 31 is circular. The center of the eccentric portion 31 coincides with the center of the rotating container 2, and the center of the tube portion 32 (also the center of the supply hole 3a) coincides with the center of the rotating shaft 4. The stationary member 3 may be a single part or may be divided into multiple parts.

The first closing member 12 is joined to the end of the eccentric portion 31 on the tube portion 32 side. Powder or wet powder flows into the space between the first closing member 12 and the inlet side end surface of the rotary container 2 through the gap between the inlet side opening 2a of the rotary container 2 and the eccentric part 31. In order to prevent this, compressed air is introduced from a compressor (not shown). This compressed air flows into the interior of the rotary container 2 through the gap between the inlet side opening 2a of the rotary container 2 and the eccentric portion 31.

The tube portion 32 of the stationary member 3 is provided with an input port 3b that opens upward. A hopper 35 is connected to this input port 3b. In this embodiment, wet powder that has been moistened by adding a treatment liquid is put into the hopper 35 .

As represented by the broken line in FIG. 4, in the granulator 1A, the cross-sectional shape of the rotating shaft 4 in the supply hole 3a and in the rotating container 2 is square. However, the shape of the rotating shaft 4 is not limited to this.

As shown in FIG. 3, the screw 5 attached to the rotating shaft 4 in the supply hole 3a includes a central tube 51 inserted into the rotating shaft 4, and a spiral screw blade provided on the outer peripheral surface of the central tube 51. Contains 52. The length of the screw 5 is approximately the same as the length of the supply hole 3a. The cross-sectional shape of the inner peripheral surface of the central tube 51 is square in accordance with the cross-sectional shape of the rotating shaft 4 in the supply hole 3a.

As shown in FIGS. 3 and 4, inside the rotating container 2, a plurality of blades 6 and rollers 7 are attached to the rotating shaft 4.

Each blade 6 has a plate shape in which a through hole 6a through which the rotating shaft 4 is inserted is formed. However, the shape of the blade 6 is not limited to this.

As shown in FIG. 4, the blade 6 has a substantially rhombic shape, and a through hole 6a is formed in the center thereof. That is, each blade 6 has a pair of blade portions that protrude in opposite directions from the through hole 6a. As described above, since the rotating shaft 4 in the rotating container 2 has a square cross-sectional shape, the through hole 6a also has a square shape.

Furthermore, a knife edge 6b is formed on each blade portion of each blade 6 so as to be sharp toward the rotation direction. The knife edge 6b is inclined toward the inlet opening 2a (away from the outlet opening 2b) in the rotation direction. Therefore, when the blade 6 rotates, the knife edge 6b applies a feeding force to the wet powder toward the outlet opening 2b of the rotating container 2.

The length Lf of each blade 6 is such that the shortest distance between each blade 6 and the inner circumferential surface 2c of the rotating container 2 (clearance just below the central axis 20 of the rotating container 2) is approximately several millimeters (for example, 1 mm to 5 mm). It is set so that

As shown in FIGS. 3 and 4, the blades 6 are attached to the rotating shaft 4 so that their directions alternate by 90 degrees. As shown in FIG. 3, a spacer ring 61 is arranged between adjacent blades 6. Each spacer ring 61 has a square-shaped through hole 61a similar to the through hole 6a of the blade 6, and is inserted into the rotating shaft 4. Note that the spacer ring 61 only needs to be attached to the rotating shaft 4 and disposed between adjacent blades 6, and the shape of the through hole 6a is not limited to a square shape. A holding member 62 is attached to the tip of the rotating shaft 4.

As shown in FIGS. 3 and 5, the roller 7 is cylindrical and has an outer peripheral surface 7a. The roller 7 is attached to the rotating shaft 4, and is rotatable together with the rotating shaft 4 about a central axis 40.

The material of the roller 7 is, for example, stainless steel. This material is not particularly limited. This material may be, for example, metal such as stainless steel, resin, or rubber. Moreover, if the material of the roller 7 is a fluororesin, it is possible to suppress the adhesion of wet powder.

As shown in FIG. 3, the roller 7 is arranged between a large number of blades 6 in the axial direction of the rotating container 2. Although the number of blades 6 to be arranged is not particularly limited, in this granulating device 1A, nine blades 6 are arranged between the roller 7 and the inlet opening 2a in the axial direction of the rotating container 2. Eight blades 6 are arranged between the roller 7 and the outlet opening 2b.

The double arrow Lr in FIG. 3 represents the axial length of the roller 7, and the double arrow Dr represents the diameter of the roller 7. The length Lr of the roller 7 is not particularly limited, but is preferably set to 0.7 times or more the diameter Dr of the roller 7 and 1.5 times or less the diameter Dr. Further, the diameter Dr of the roller 7 is not particularly limited, but is set to be equal to or larger than the length Lf of the blade 6 (see FIG. 4), for example.

As shown in FIG. 5, the roller 7 has a through hole 7b through which the rotating shaft 4 is inserted. The through hole 7b has a square shape because the rotating shaft 4 in the rotating container 2 has a square cross-sectional shape. The shortest distance C between the outer circumferential surface 7a of the roller 7 and the inner circumferential surface 2c of the rotating container 2 (the clearance directly below the central axis 20 of the rotating container 2) is set to be approximately several millimeters (for example, 1 mm to 5 mm). Set. This shortest distance C is preferably set to be the same as the shortest distance between the blade 6 and the inner peripheral surface 2c of the rotating container 2, or smaller than the shortest distance between the blade 6 and the inner peripheral surface 2c of the rotating container 2.

In the granulator 1A having the configuration described above, wet powder is charged into the supply hole 3a through the hopper 35 and the input port 3b shown in FIG. 3. The wet powder is fed into the rotating container 2 by a screw 5. In the rotating container 2, the rotating container 2 rotates to flow the wet powder, and the blades 6 rotate together with the rotating shaft 4 to mix, knead, and crush the wet powder. ) while being sent toward the rollers 7.

The wet powder that has reached the roller 7 is pressed by the outer circumferential surface 7a of the rotating roller 7 against the inner circumferential surface 2c of the rotating container 2, which rotates at a circumferential speed different from that of the roller 7. The wet powder is kneaded between the rollers 7 and the inner peripheral surface 2c of the rotating container 2. The wet powder kneaded by the roller 7 is sent from the roller 7 to the blade 6 arranged on the outlet side opening 2b side.

The wet powder kneaded by the rollers 7 is mixed, kneaded, and crushed by the rotation of the rotary container 2 and the rotation of a large number of blades 6, and is sent toward the outlet side opening 2b of the rotary container 2. The granules granulated from the wet powder are discharged from the rotating container 2 in this manner. The discharged granules are guided to the chute 14 and sent to the next process.

In this granulator 1A, wet powder is mixed, kneaded, and crushed by the rotation of a horizontally extending rotating container 2 and the rotation of a large number of blades 6. This results in granules in which a large number of powders are uniformly mixed.

In this granulator 1A, the wet powder is kneaded by rollers 7. The wet powder is crushed by rollers 7 and kneaded strongly. The voids within the wet powder are crushed by the rollers 7. Thereby, even if the rotating container 2 extending laterally is used, granules with a high specific gravity can be obtained.

In this granulating device 1A, a roller 7 is arranged between a large number of blades 6 in the axial direction of the rotating container 2. The wet powder supplied to the rotating container 2 is primarily mixed, kneaded, and crushed by a large number of blades 6 closer to the inlet opening 2a than the rollers 7. This primarily mixed, kneaded and crushed wet powder is kneaded by rollers 7. The wet powder kneaded by the roller 7 is secondarily mixed, kneaded, and crushed by a large number of blades 6 closer to the outlet side opening 2b than the roller 7. As a result, granules having a high specific gravity and a uniform shape and particle size can be obtained.

The granulating device 1A is arranged in a rotating container 2 and includes a rotating shaft 4 to which a large number of blades 6 and rollers 7 are attached. This roller 7 is attached to a rotating shaft 4 that rotates a large number of blades 6. This roller 7 does not require any other shaft in addition to the rotating shaft 4, and does not require any other electric motor in addition to the electric motor 41. From this point of view, it is preferable that a large number of blades 6 and rollers 7 are attached to the rotating shaft 4. In addition, in this granulating device 1A, the roller 7 may be attached to a shaft other than the rotating shaft 4, and may be rotated by another motor other than the electric motor 41.

In the granulating device 1A, the roller 7 has a through hole 7b through which the rotating shaft 4 is inserted, and each blade 6 has a through hole 6a through which the rotating shaft 4 is inserted. The position of this roller 7 is interchanged with the position of the blade 6. Thereby, the granulator 1A can adjust the position of the roller 7 in the axial direction of the rotating container 2 according to the use of the granules. Further, the roller 7 can be replaced with another roller having a different length, diameter, condition of the outer peripheral surface, etc. From this point of view, it is preferable that the roller 7 has the through hole 7b and each blade 6 has the through hole 6a. Furthermore, from this point of view, it is preferable that the granulating device 1A has a spacer ring 61 having a through hole 61a through which the rotating shaft 4 is inserted.

Further, in this granulating device 1A, the roller 7 is integral, but may be formed by overlapping two or more roller bodies divided in the axial direction. The length Lr of the roller 7 may be made adjustable by using the roller 7 in which two or more roller bodies are stacked one on top of the other. Furthermore, although the roller 7 has a constant diameter from one end to the other end in the axial direction, the diameter is not limited to this.

In addition, in this granulating device 1A, a large number of convex portions protruding from the inner circumferential surface 2c may be formed on the inner circumferential surface 2c of the rotating container 2. For example, a large number of convex portions are arranged and arranged at intervals in the circumferential direction of the rotating container 2. Each of the protrusions is formed in a line shape extending in the axial direction of the rotating container 2. By forming this convex portion on the inner circumferential surface 2c in the range where a large number of blades 6 are located in the axial direction, slipping of the wet powder on the inner circumferential surface 2c is suppressed, and the decomposition of the wet powder is suppressed. Crushing and mixing are promoted. In this case as well, it is preferable that no convex portion be formed on the inner circumferential surface 2c in the range where the roller 7 is located in the axial direction.

A granulating device 1B according to another embodiment is shown in FIGS. 6 and 7. Here, a configuration different from that of the granulating device 1A will be explained. The same configuration as the granulator 1A will be explained using the same reference numerals, and the description of the same configuration as the granulator 1A will be omitted. This granulating device 1B includes a scraper 8. The other configuration of the granulating device 1B is the same as that of the granulating device 1A.

As shown in FIGS. 6 and 7, the scraper 8 is arranged above the blade 6 and extends in the axial direction of the rotating container 2. The scraper 8 serves to scrape off wet powder adhering to the inner circumferential surface 2c of the rotating container 2.

As shown in FIG. 6, one end of the scraper 8 is fixed to the eccentric portion 31 of the stationary member 3 via a first arm 81 and a second arm 83. The other end of the scraper 8 is fixed to the chute 14 via an arm 82 and a rod 84.

This scraper 8 may or may not come into contact with the inner peripheral surface 2c of the rotating container 2. When there is no contact, it is preferable that the clearance between the tip of the scraper 8 and the inner circumferential surface 2c be as narrow as possible. Although the scraper 8 is fixed, it may be movable toward and away from the inner circumferential surface 2c.

The material of the scraper 8 is not particularly limited. The material of the scraper 8 may be, for example, metal (for example, stainless steel), resin, or rubber, if the scraper 8 does not contact the inner circumferential surface 2c of the rotating container 2. When the scraper 8 comes into contact with the inner circumferential surface 2c, this material is preferably a resin with excellent sliding properties, such as a fluororesin (for example, PTFE (polytetrafluoroethylene)) or nylon.

In particular, if the material of the scraper 8 is a fluororesin, adhesion of wet powder to the scraper 8 itself can be suppressed. Further, from the viewpoint of suppressing adhesion of wet powder to the scraper 8 itself, it is preferable that the surface area of the scraper 8 is small.

In the granulating device 1B, the wet powder pressed and adhered to the inner peripheral surface 2c by the roller 7 can be scraped off by the scraper 8. This granulating device 1B can prevent the wet powder from adhering to the inner circumferential surface 2c for a long period of time.

FIG. 8 shows a granulating device 1C according to yet another embodiment. Here, a configuration different from that of the granulating device 1A will be explained. The same configuration as the granulator 1A will be explained using the same reference numerals, and the description of the same configuration as the granulator 1A will be omitted. This granulating device 1C includes a lid 9. The other configuration of the granulator 1C is the same as that of the granulator 1A.

The lid 9 includes a main body 91 disposed at the outlet opening 2b of the rotary container 2, a support shaft 92 that supports the main body 91, a positioning member 93 fixed to the chute 14, and a fixing nut 94 as a fixture. .

As shown in the partially enlarged view of FIG. 8, the rotary container 2 has a tapered surface 2e formed between the inner circumferential surface 2c and the end surface 2d of the outlet side opening 2b. This tapered surface 2e is inclined radially outward from the inlet side opening 2a toward the outlet side opening 2b in the axial direction of the rotary container 2.

The main body 91 of the lid 9 has a tapered surface 91a facing the tapered surface 2e of the rotating container 2. This tapered surface 91a is inclined radially outward in the axial direction of the rotary container 2 from the inlet side opening 2a toward the outlet side opening 2b. In this granulator 1C, the inclination angle of the tapered surface 2e and the inclination angle of the tapered surface 91a of the main body 91 are made the same. The main body 91 forms a gap G between it and the rotating container 2, and covers the outlet side opening 2b.

A support shaft 92 of the lid 9 is attached to the chute 14 via a positioner 93. For example, although not shown, a male thread is formed at the tip of the support shaft 92 that is fixed to the main body 91 and extends from the main body 91. The positioning member 93 has a female thread that engages with the male thread of the support shaft 92 . The male thread of the support shaft 92 is screwed into this female thread, and the positioning member 93 supports the main body 91 so that its position can be adjusted in the axial direction of the rotary container 2 . Then, the fixing nut 94 is screwed onto the male thread of the support shaft 92, and the fixing nut 94 is pressed against the positioning member 93, thereby positioning and fixing the main body 91.

As shown in FIG. 8, the gap G formed by the tapered surface 2e and the tapered surface 91a extends obliquely with respect to the axial direction of the rotary container 2. As shown in FIG. The double-headed arrow t in FIG. 8 represents the width of the gap G. The width t of this gap G is determined on a straight line perpendicularly intersecting the tapered surface 2e. This width t is a constant size from the entrance to the exit of the gap G. By passing through this gap G, the wet powder is discharged while coming into contact with the tapered surface 10e and the tapered surface 85a. As a result, the wet powder is spheroidized in the gap G. The granulator 1C can adjust the shape and particle size of the wet powder kneaded by the rollers 7. The granulator 1C can suppress variations in the shape and particle size of the obtained granules. This width t may be set according to the use of the granules, and is not particularly limited, but is, for example, 0.5 mm or more and 3 mm or less.

Further, the main body 91 of the lid 9 can be moved in the axial direction of the rotating container 2 by means of a positioning member 93 and a fixing nut 94, and can be positioned at a predetermined position. Thereby, the granulating device 1C can adjust the width t of the gap G. Thereby, the granulator 1C can obtain granules with a particle size suitable for the purpose. Note that the positioning 93 and fixing nut 94 are merely examples, and the position adjuster of the main body 91 is not limited to these. This position adjuster only needs to be able to move the main body 91 in the axial direction of the rotary container 2 and position it at a predetermined position. Moreover, this lid 9 does not need to be provided with a position adjuster.

Note that this gap G does not have to be formed all around the rotating container 2 in the circumferential direction. The main body 91 only needs to form a gap G extending along at least a part of the circumferential direction between the main body 91 and the rotary container 2 at the outlet side opening 2b, and does not need to cover other parts of the outlet side opening 2b. Good too. In other parts of the outlet opening 2b, the main body 91 may have an opening larger than the gap G as long as the wet powder is prevented from flowing out.

Further, in the granulator 1C, the gap G has a constant width t and extends obliquely with respect to the axial direction of the rotating container 2, but the gap G is not limited to this. The gap G may be formed to extend in the axial direction of the rotating container 2. Further, the width t of the gap G may be made larger at the entrance than at the exit, or may be gradually decreased. The gap G may be curved between the inlet and the outlet. Irregularities extending in the circumferential direction of the rotary container 2 may be formed on one or both of the opposing surface of the main body 91 of the lid 9 and the opposing surface of the rotating container 2, which form the gap G. In this way, by adjusting the width t, length, and shape of the gap G, the residence time of the wet powder in the gap G can be adjusted, and the shape and particle size of the resulting granules can be adjusted.

Moreover, this granulator 1C may be provided with the scraper 8 together with the lid 9, similarly to the granulator 1B.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the gist of the present invention.

[Disclosure items]
Each of the following items is a disclosure of a preferred embodiment.

[Item 1]
A granulation device for producing granules by granulating wet powder,
A cylindrical rotating container that extends horizontally,
a large number of blades that rotate within the rotating container and feed the wet powder toward one opening in the axial direction of the rotating container while kneading and crushing the wet powder;
a roller that rotates within the rotating container and kneads the wet powder with an inner circumferential surface of the rotating container;
A granulation device comprising:

[Item 2]
The granulation device according to item 1, wherein the roller is arranged between two adjacent blades of a large number of blades lined up in the axial direction of the rotating container.

[Item 3]
The granulation device according to item 1 or 2, comprising a scraper that scrapes off wet powder adhering to the inner circumferential surface of the rotating container.

[Item 4]
According to any one of items 1 to 3, comprising a lid that forms a gap with the rotating container to cover at least a portion of the opening, and discharges the wet powder from the gap while contacting the rotating container. granulation equipment.

[Item 5]
The granulation device according to any one of items 1 to 4, comprising a rotating shaft disposed in the rotating container and having the roller and a number of blades attached thereto.

[Item 6]
the roller has a through hole through which the rotating shaft is inserted;
The granulation device according to item 5, wherein each blade has a through hole through which the rotating shaft is inserted.

1A, 1B, 1C... Granulation device 2... Rotating container 2b... Outlet side opening (opening)
2c...Inner peripheral surface 2e...Tapered surface 4...Rotating shaft 6...Blade 6a...Through hole 7...Roller 7b...Through hole 8...Scraper 9... Lid G...Gap

Claims (6)

A granulation device for producing granules by granulating wet powder,
A cylindrical rotating container that extends horizontally,
a large number of blades that rotate within the rotating container and feed the wet powder toward one opening in the axial direction of the rotating container while kneading and crushing the wet powder;
a roller that rotates within the rotating container and kneads the wet powder with an inner circumferential surface of the rotating container;
A granulation device comprising: The granulation device according to claim 1, wherein the roller is arranged between two adjacent blades of a large number of blades lined up in the axial direction of the rotating container. The granulation device according to claim 1 or 2, further comprising a scraper that scrapes off wet powder adhering to the inner circumferential surface of the rotating container. Any one of claims 1 to 3, further comprising a lid that forms a gap with the rotating container to cover at least a portion of the opening, and discharges the wet powder from the gap while contacting the rotating container. Granulation equipment as described. The granulation device according to any one of claims 1 to 4, comprising a rotating shaft disposed within the rotating container and to which the roller and a large number of blades are attached. the roller has a through hole through which the rotating shaft is inserted;
The granulation device according to claim 5, wherein each blade has a through hole through which the rotating shaft is inserted.

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