JP6929061B2 - Stirring granulator - Google Patents

Description

The present invention relates to a stirring granulator for stirring and granulating raw materials put into a container.

In various fields such as chemistry, food, medicine, and energy, granulators are used to granulate raw materials to produce desired products (granulated products). For example, widely used stirring and granulating machines generally include a cylindrical container for storing raw materials, stirring and mixing to produce granulated products, and a stirring blade rotatably provided in the container. It is equipped with an agitator blade) and a crushing blade (chopper blade) for improving the dispersibility of powder during mixing and crushing lumps during granulation, and inside the container by rotating the stirring blade. Stir, mix and granulate the raw materials of. In addition, the container has a lid member on the ceiling for internal inspection and maintenance, and a raw material supply port and a binder (binder) for supplying raw materials to the inside of the container are put into the lid member. A binder injection nozzle for this purpose is provided.

In addition, the stirring granulator adheres to the inner surface of the container without opening the lid member to open the inside of the container in order to improve work efficiency, prevent damage to the health of workers, and prevent the spread of contamination to the external environment. It is provided with a scraper mechanism having a scraper that contacts the inner surface of the container and scrapes off the adhered raw material, and a scraper arm that holds the scraper and rotates (swirls) horizontally along the inner surface of the container in order to remove the raw material. Often there are.

In the stirring granulator, in the container, the raw material powder is appropriately mixed with the binder by the rotation of the stirring blade, and while being stirred, it collides with the side wall of the container and is repelled, pushed upward and inverted. , Raw material powder is bonded by a binder and granulated.

Here, for example, when a stirring granulator is operated in a batch to produce a granulated product, the raw material powder stored in the container is stirred by the stirring blades, and the binder is blown from the binder charging nozzle at the top of the container. Granulated products are produced by the above process by appropriately adding, mixing with the raw material and stirring. At this time, the binder charged downward from the binder charging nozzle is mixed into the granulated material layer flowing or floating inside the container due to the above-mentioned movement or flow state of the raw material powder or the like in the container. In this way, the binder charged from the binder charging nozzle falls on the granulated material layer immediately below the binder charging nozzle and is mixed, so that the concentration distribution of the binder occurs in the container, and the produced granulated product. There may be a problem that the quality such as particle size and hardness of the material becomes non-uniform.

Further, for example, in the case of continuous operation in which the raw material and the binder are continuously supplied from the raw material supply port and the binder input nozzle on the upper part of the container, and the granulated material is continuously discharged from the granulated product discharge port on the side of the container. The charged raw materials and binder are mixed in the granulated layer that is flowing or floating inside the container, and are discharged from the side granulated outlet while being mixed with the already existing granulated material. In addition, there may be a problem that an unfinished granulated product is produced.

To deal with such problems, for example, in Patent Document 1 (Claims, FIG. 1, etc.), the inclination angle of the bottom wall of the container with respect to the horizontal plane depends on the type of raw material, binder, and size of the container. The powder (raw material) is tilted to an appropriate angle and falls from the inlet arranged above so that it falls from the center of the intermediate space in the container toward the recess of the flow located on the left side of the paper surface. Has been proposed so that the binder is charged from the binder charging nozzle.

However, in Patent Document 1, due to the presence of the binder injection nozzle protruding downward from the inner surface of the lid member, the scraper arm is prevented from interfering with the binder injection nozzle at the time of turning in the portion below the lid member. It is arranged horizontally away from the inner surface of the lid member. For this reason, it is difficult to scrape off the raw material adhering to the inner surface of the lid member, and there are restrictions on the installation positions of the binder injection nozzles in the height direction and the horizontal direction. Is becoming difficult.

Further, when the scraper mechanism is operated during the granulation operation, there is also a problem that the binder charged from the binder charging nozzle is sprayed on the scraper mechanism in operation.

JP-A-2002-306945

The present invention has been made in view of the above-mentioned problems in the prior art, and the binder charging nozzle is provided so that the raw material adhering to the inner surface of the container can be removed over a wide range including the inner surface of the lid member by the scraper mechanism. It is an object of the present invention to provide a stirring granulator that can be placed in an appropriate position.

In order to solve the above problems, the stirring granulator according to the first aspect of the present invention is a stirring granulator for stirring and granulating a raw material, which has a lid on the ceiling and the raw material. A container having a substantially rotationally symmetric shape for storing the container, a binder supply means for supplying the binder to the inside of the container, a scraper mechanism for removing the raw material adhering to the inner surface of the container, and the like. The scraper mechanism is connected to the lid and rotates around the central axis of the container, and is connected to the drive shaft and extends along the inner surface of the container to the inner surface of the container. A binder supply having a scraper portion for removing the raw material that comes into contact with the inner surface of the container, and the binder supply means penetrates the inside of the drive shaft and communicates between the inside and the outside of the container. It is characterized by having a pipe and a binder discharging portion provided at an end portion of the binder supply pipe and discharging the binder into the inside of the container.

A second aspect of the present invention is characterized in that, in the first aspect, the binder supply pipe is configured to rotate together with the scraper portion.

A third aspect of the present invention is characterized in that, in the first aspect, the binder supply pipe is rotatably connected to the drive shaft.

A fourth aspect of the present invention is characterized in that, in any one of the first to third aspects, the binder emitting portion is configured so that the released binder does not blow onto the scraper portion. do.

A fifth aspect of the present invention is configured in any one of the first to fourth aspects so that the binder supply means can supply the binder to the inside of the container even during the rotation operation of the scraper mechanism. It is characterized by being done.

A sixth aspect of the present invention is, in any one of the first to fifth aspects, radially extending from the central portion of the container to the vicinity of the inner surface of the side portion inside the container and rotating around the central axis. A stirring blade for stirring the raw material is provided, and the scraper portion extends along the inner surface of the container to the vicinity of the outer peripheral portion of the stirring blade.

In a seventh aspect of the present invention, in the sixth aspect, a crushing blade is provided on the side portion of the container, and the scraper portion is rotated in both directions with respect to the central axis, whereby the scraper portion is described. It is characterized in that it is possible to approach and separate from the crushing blade.

An eighth aspect of the present invention is characterized in that, in any one of the first to seventh aspects, the binder supply pipe can also serve as a cleaning liquid supply pipe during clean-in-place cleaning.

According to the present invention, a stirring granulator capable of arranging a binder charging nozzle at an appropriate position so that the raw material adhering to the inner surface of the container can be removed over a wide range including the inner surface of the lid member by the scraper mechanism. Can be provided.

It is a vertical cross-sectional view which shows the schematic structure of one Embodiment of the stirring granulation machine which concerns on this invention. It is an arrow view of the cross section AA of FIG. It is a vertical cross-sectional view which shows the schematic structure of the stirring granulator when the binder discharge nozzle of the modification 1 is used. It is a vertical cross-sectional view which shows the schematic structure of the stirring granulator when the binder discharge nozzle of the modification 2 is used. It is a vertical cross-sectional view which shows the schematic structure of the stirring granulation machine by another modification. It is a vertical cross-sectional view which shows the schematic structure of the stirring granulation machine by still another modification.

Hereinafter, an embodiment of the stirring granulator according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, the stirring granulator 1 according to the present embodiment has a container 2 in which raw materials are charged and stored for granulation, a stirring blade 6 for stirring and granulating the raw materials, and a crushing blade 8. , And a scraper mechanism 19.

The container 2 has a substantially rotationally symmetric shape, has a lid 5 that can be opened and closed on the ceiling, and by closing the lid 5, the inside can be isolated from the outside and sealed.

Further, the lid 5 is provided with a raw material supply port 18 for supplying raw materials to the inside of the container 2 on the outer peripheral portion, and a scraper mechanism 19 for removing the raw material adhering to the inner surface of the container 2 is connected to the central portion.

The stirring blade 6 is arranged at the bottom of the container 2, is driven by an external motor (not shown) via the stirring blade drive shaft 7, and rotates around the rotationally symmetric central axis of the container 2 to stir the raw material. Granulate. In the present embodiment, three stirring blades 6 are provided at equal intervals in the circumferential direction, but the number of stirring blades 6 is appropriately changed according to the type of raw material, the size of the stirring machine 1, and the like.

The crushing blade 8 is arranged above the stirring blade 6 at a position closer to the container side 4 inside the container 2, and is rotated via the rotating shaft 9 by a motor (not shown) arranged outside. When the raw materials are mixed, the raw materials are pushed out toward the center of the container 2 to improve the dispersibility, and when granulating, the lumps are crushed to prepare the grains.

The scraper mechanism 19 is connected to the central portion of the lid 5, a drive shaft 17 rotating around a central axis substantially the same as the rotationally symmetric central axis of the container 2, and an arm connecting portion 12 arranged at the lower end of the drive shaft 17. , And a scraper portion 16 connected to the arm connecting portion 12. The scraper portion 16 extends downward along the inner surface of the container 2 including the lid 5 to the vicinity of the upper end of the outer peripheral portion of the stirring blade 6, and is connected to the scraper arm 15 connected to the drive shaft 17 and the scraper arm 15. The scraper 14 is provided so as to come into contact with the inner surface of the container 2 from the vicinity of the connection portion of the lid 5 with the drive shaft 17 to the vicinity of the upper end of the outer peripheral portion of the stirring blade 6 to remove the raw material adhering to the inner surface of the container 2. .. Hereinafter, unless otherwise specified, the inner surface of the container 2 shall include the inner surface of the lid 5.

In the above configuration, the scraper portion 16 can be brought closer to and separated from the crushing blade 8 by rotating the scraper portion 16 in both directions with respect to the central axis of the container 2.

The scraper arm 15 is horizontally rotated (turned) via the drive shaft 17 by a scraper mechanism motor (not shown) arranged above the container 2, thereby scraping the raw material adhering to the inner surface of the container 2 in the rotation range. , Can be removed.

The binder supply means 13 is connected to a binder supply pipe 11 and a binder supply pipe 11 that penetrate the inside of the drive shaft 17 and communicate the inside and the outside of the container 2, and discharge the binder into the container 2. The nozzle 10 is provided. The binder supply pipe 11 and the binder discharge nozzle 10 may be formed as separate members and then connected to each other, or may be integrally formed from the beginning.

The binder supply pipe 11 extends below the arm connecting portion 12, and is connected to the binder discharge nozzle 10 arranged inside the container with respect to the scraper arm 15. Further, the binder discharge nozzle 10 extends toward the outer peripheral portion along the scraper arm 15, and discharges the binder from the tip end. As a result, the scraper 14 can remove the raw material adhering to the inner surface of the container 2 over a wide range without being restricted by the binder discharge nozzle 10 when the scraper arm 15 is swiveled.

The position of the tip of the binder discharge nozzle 10 and the discharge direction of the binder are set based on the types of the raw material and the binder, the quality of the granulated product, the size of the granulator, the operating conditions, and the like. Therefore, as a modification, the binder discharge nozzle 10 is connected vertically downward from the connecting portion with the binder supply pipe 11, and the binder is vertically downwardly connected at the center of the container 2. May be released (Modification 1). In this case, the tip of the binder discharge nozzle 10 may be formed in a mist shape or a shape or a structure capable of widening the discharge angle so that the binder falls over a wide range.

The binder supply pipe 11 that communicates with the inside of the drive shaft 17 may be fixedly connected to the drive shaft 17, or conversely may be freely rotatably (rotatably) connected to the drive shaft 17.

When the binder supply pipe 11 is fixedly connected to the drive shaft 17, the position of the tip of the binder discharge nozzle 10 in the circumferential direction can be changed as necessary by operating the drive shaft 17. Thereby, for example, during the operation of the stirring granulator, the raw material adhering to the inner surface of the container 2 can be scraped off and the circumferential position of the binder discharge can be changed at the same time.

Further, when the binder supply pipe 11 is fixedly connected to the drive shaft 17, the binder discharge nozzle 10 can be fixedly connected to the scraper arm 15. Therefore, as a modification, as shown in FIG. 4, the binder discharge nozzle 10 is arranged inside the scraper arm 15 (deformation example 2), or is attached to the side portion 4 of the scraper arm 15 in the height direction. Therefore, for example, in a small device, the space inside the container can be effectively used.

Further, when the binder discharge nozzle 10 is arranged inside the scraper arm 15 or attached to the side portion 4 of the scraper arm 15, the binder discharge nozzle 10 is prevented so that the discharged binder does not blow on the scraper arm 15. The shape, position (including the mutual positional relationship with the scraper arm 15), the discharge direction, and the like are set.

On the other hand, when the binder supply pipe 11 is rotatably connected to the drive shaft 17, the binder supply pipe 11 and the drive shaft 17 can be rotated independently. When the binder supply pipe 11 is fixedly connected to the drive shaft 17, the binder discharge nozzle 10 and the binder supply pipe 11 are always rotated even when the position of the binder discharge nozzle 10 in the circumferential direction does not need to be changed. However, when the binder supply pipe 11 is rotatably connected to the drive shaft 17, it is sufficient to rotate the binder discharge nozzle 10 only when it is necessary to change the position of the binder discharge nozzle 10 in the circumferential direction.

When the binder supply pipe 11 is rotatably connected to the drive shaft 17, a rotary bearing is required at the penetration portion of the drive shaft 17 of the binder supply pipe 11, but the lid 5 of the drive shaft 17 penetrates. On the other hand, the rotary bearing of the binder supply pipe 11 has a lower load condition and is smaller than the rotary bearing of the drive shaft 17, while the rotary bearing is used in the section.

Further, whether the binder supply pipe 11 is fixedly connected to the drive shaft 17 or rotatably connected to the drive shaft 17, during the operation of the stirring granulator , The position of the binder discharge nozzle 10 in the circumferential direction can be changed. A separate drive motor is required to automatically change the position of the binder discharge nozzle 10 in the circumferential direction when the binder supply pipe 11 is rotatably connected to the drive shaft 17. However, since the load conditions are low and advanced positioning is not required, a small and simple one is sufficient.

The stirring granulator 1 in the above embodiment is described by taking as an example a stirring granulator provided with a stirring blade 6 and stirring a raw material with the stirring blade 6 to produce a granulated product. The granulation machine according to the present invention is not limited to this, and may be another type of granulation machine such as a fluidized bed type granulation machine.

Further, as a modification of the above embodiment, as shown in FIG. 5 or 6, the binder supply pipe 11 may also serve as a cleaning liquid supply pipe during clean-in-place cleaning (CIP). ..

That is, in the configuration shown in FIG. 5, the cleaning nozzle 20 for discharging the cleaning liquid toward the inner surface of the lid 5 instead of the binder discharge nozzle 10 at the tip of the binder supply pipe 11 during the clean-in-place cleaning (CIP). The inner surface of the lid 5 can be cleaned by attaching the lid 5. Further, in the configuration shown in FIG. 6, during the clean-in-place cleaning (CIP), cleaning is performed to discharge the cleaning liquid to the tip of the binder supply pipe 11 toward the inner surface of the container side 4 instead of the binder discharge nozzle 10. By attaching the nozzle 21, the inner surface of the container side portion 4 can be cleaned.

In the configuration shown in FIG. 5 or 6, by cleaning while rotating the cleaning nozzles 20 and 21 integrally with the scraper arm 15, blind spots are formed on the inner surface of the lid 5 and the inner surface of the container side portion 4. No, complete cleaning is possible.

1 Stirring granulator 2 Container 3 Bottom 4 Side 5 Lid 6 Stirring blade 7 Stirring blade drive shaft 8 Crushing blade 9 Rotating shaft 10 Binder discharge nozzle (binder discharge part)
11 Binder supply pipe 12 Arm connecting part 13 Binder supply means 14 Scraper 15 Scraper arm 16 Scraper part 17 Drive shaft 18 Raw material supply port 19 Scraper mechanism 20, 21 Cleaning nozzle

Claims (6)

A stirring granulator for stirring and granulating raw materials.
A container having a lid on the ceiling and having a substantially rotationally symmetric shape for storing the raw material inside the container.
A binder supply means for supplying a binder to the inside of the container,
A scraper mechanism for removing the raw material adhering to the inner surface of the container is provided.
The scraper mechanism is connected to the lid and is connected to a drive shaft that rotates around the central axis of the container, and is connected to the drive shaft, extends along the inner surface of the container, and comes into contact with the inner surface of the container. It has a scraper portion for removing the raw material adhering to the inner surface of the container.
The binder supply means is provided at the end of the binder supply pipe and the binder supply pipe that penetrates the inside of the drive shaft and communicates the inside and the outside of the container, and discharges the binder into the container. and a binder release unit that, the possess,
A stirring granulator in which the binder supply pipe is rotatably connected to the drive shaft. The stirring granulator according to claim 1 , wherein the binder discharging unit is configured so that the discharged binder does not blow onto the scraper unit. The stirring granulator according to claim 1 or 2 , wherein the binder supplying means is configured to be able to supply the binder to the inside of the container even during the rotating operation of the scraper mechanism. Inside the container, a stirring blade for stirring the raw material is provided so as to extend radially from the center of the container to the vicinity of the inner surface of the side portion and rotate around the central axis.
The stirring granulator according to any one of claims 1 to 3 , wherein the scraper portion extends along the inner surface of the container to the vicinity of the outer peripheral portion of the stirring blade. A crushing blade is provided on the side of the container.
The stirring granulator according to claim 4 , wherein the scraper portion can be brought close to and separated from the crushing blade by rotating the scraper portion in both directions with respect to the central axis. The stirring granulator according to any one of claims 1 to 5 , wherein the binder supply pipe can also serve as a cleaning liquid supply pipe during clean-in-place cleaning.

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