Stirring device

Abstract

To provide a stirring device capable of producing slurry in which linear carbon such as CNT is uniformly mixed and dispersed.SOLUTION: There is provided a thin-film turning-type stirring device in which a side surface of a cylindrical part is formed of a first region which is sectioned in the band shape in the circumferential direction of the cylindrical part and in which a plurality of holes penetrating in the inside-outside direction are formed and a second region which is sectioned in the band shape in the circumferential direction of the cylindrical part and in which the plurality of holes penetrating in the inside-outside direction are formed so as to have the smaller opening ratio than that of the first region or no holes are formed. The first region is disposed in a portion including the center in the height direction of the cylindrical part, while the second region is disposed from the upper end of the first region to the upper end of the cylindrical part, and from the lower end of the first region to the lower end of the cylindrical part. When the width of the first region is defined as Wp and the total height of a rotating member is defined as H, the relationship 0<Wp<0.5H is satisfied. Additionally, a plurality of protrusions are arranged along the circumferential direction of the container on the inner wall surface of the container.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a stirring device for performing emulsification and dispersion treatment, and is used, for example, in the production of a slurry containing a conductive material and the like.

Background Art

[0002] In addition to power supplies for portable electronic devices, battery demands typified by lithium-ion secondary batteries and fuel cells, such as the storage of electric power generated by power supplies for electric vehicles and wind / solar power generation facilities, are predicted to increase in the future. Further, not only is it required to further improve characteristics such as miniaturization, weight reduction, and safety of the battery itself, but it is also required to produce batteries having these characteristics efficiently and at low cost.

[0003] As an effective means for solving this problem, a high-speed stirrer disclosed in Patent Document 1 has been proposed. This high-speed stirrer has a rotating shaft provided concentrically in a cylindrical stirring tank, and a rotating blade having a diameter slightly smaller than that of the stirring tank is attached to the rotating shaft. The high-speed stirrer stirs the liquid to be treated while spreading it in a thin film cylindrical shape on the inner surface of the stirring tank by the high-speed rotation of the rotating blade. The rotating blade includes a porous cylindrical portion provided with a large number of small holes penetrating in the radial direction on the outer peripheral side of a cylindrical body. According to this high-speed stirrer, there is an effect that a simple structure with a large number of small holes formed in the cylindrical body can exhibit an excellent stirring action. Further, since there is no surface that collides with the liquid to be treated, there is an advantage that even when treating a liquid containing a solid component, wear is small and there is little possibility that the metal component of the rotating blade is mixed into the liquid to be treated.

[0004] Further, the stirring device system disclosed in Patent Document 2 uses the high-speed stirrer of Patent Document 1. When manufacturing a paint for a battery electrode using this stirring device system, there is an advantage that a paint for an electrode suitable for enhancing the performance of the battery can be efficiently manufactured while maintaining a high level of battery safety.

Prior Art Documents

Patent Documents

[0005] Patent Document 1 Japanese Patent Application Laid-Open No. 11-347388 Patent Document 2 International Publication No. 2010 / 018771 Summary of the Invention Problems to be Solved by the Invention

[0006] In recent years, attempts have been made to apply linear carbon such as carbon nanotubes (CNTs) as additives to batteries, resins, etc. Generally, linear carbon such as CNTs has excellent properties such as a large specific surface area compared to conventional carbon materials. Therefore, if a part of the conductive material of a lithium-ion secondary battery is replaced with CNTs or the like, an improvement in its performance can be expected. However, linear carbon such as CNTs has a strong cohesive force due to its large specific surface area, etc., and it is difficult to produce a slurry that is uniformly mixed and dispersed. As a result of intensive studies by the inventors of the present invention to solve this problem, it has been found that the above problems can be solved by reexamining the arrangement of a large number of small holes provided so as to penetrate in the radial direction of the porous cylindrical portion (cylindrical portion) of the rotating blade (rotating member), and further, by reexamining the surface structure of the container wall surface, it has been found that the above problems can be solved even more. Means for Solving the Problems

[0007] Specifically, the stirring device of the present invention includes a container and a rotating member that rotates at high speed slightly inside the inner wall surface of the container. The stirring device stirs a stirring target that exists in a film shape between the rotating member and the inner wall surface by the centrifugal force generated by the rotating member. The rotating member has a cylindrical portion that is positioned with a slight gap with respect to the inner wall surface of the container. The side surface of the cylindrical portion is divided into a first region that is divided into a strip shape in the circumferential direction of the cylindrical portion and has a plurality of holes penetrating in the inner and outer directions, and a second region that is divided into a strip shape in the circumferential direction of the cylindrical portion and has a plurality of holes penetrating in the inner and outer directions formed so as to be smaller than the opening ratio of the first region. The first region is disposed in a portion including the center in the height direction of the cylindrical portion. The second region is disposed from the upper end of the first region to the upper end of the cylindrical portion and from the lower end of the first region to the lower end of the cylindrical portion. When the width of the first region is Wp and the total height of the rotating member is H, the relationship 0 < Wp < 0.5H is satisfied. On the surface of the inner wall surface of the container, a plurality of convex portions are formed in an array in the circumferential direction of the container, which are formed to extend in the central axis direction of the container and protrude from the base portion of the inner wall surface of the container toward the center of the container. Preferably, the outer edge shape of the surface of the inner wall surface of the container in a cross-section perpendicular to the central axis of the container is formed to include a concave portion connecting the convex portions adjacent to the convex portions.

[0008] Preferably, in the stirring device, when the opening ratio of the plurality of holes penetrating in the inner and outer directions of the first region is P1 and the opening ratio of the plurality of holes penetrating in the inner and outer directions of the second region is P2, 0 ≦ P2 / P1 < 0.5 and P1 > 0 satisfies the relationship.

[0009] In addition, in the stirring device, it is preferable that the plurality of holes penetrating in the inner and outer directions of the first region have an inner opening area of each hole larger than the outer opening area. It is preferable that the plurality of holes penetrating in the inner and outer directions of the first region have a larger number of inner openings of each hole than the number of outer openings. It is preferable that the penetration path of each hole of the plurality of holes penetrating in the inner and outer directions of the first region branches inside the cylindrical portion.

[0010] Furthermore, it is preferable that the rotating member has a horizontal portion orthogonal to the rotation axis of the rotating member inside the cylindrical portion, and the inner space of the cylindrical portion is partitioned into an upper space and a lower space by the horizontal portion.

[0011] It is preferable that the plurality of holes penetrating in the inner and outer directions of the first region have the penetration paths of the individual holes branched inside the cylindrical portion, and the inner openings of the individual holes are respectively arranged in the upper space and the lower space. It is preferable that the plurality of holes penetrating in the inner and outer directions of the first region are arranged such that the holes with the inner openings arranged in the upper space and the holes with the inner openings arranged in the lower space are alternately arranged in the circumferential direction of the cylindrical portion.

Advantages of the Invention

[0012] Generally, in a stirring device (thin-film swirling type stirring device) including a container and a rotating member that rotates at high speed slightly inside the inner wall surface of the container, and stirring an object to be stirred that exists in a film shape between the rotating member and the inner wall surface by the centrifugal force generated by the rotating member, the object to be stirred supplied into the container from a supply port provided at the bottom of the container is carried along the inner peripheral surface and the outer peripheral surface of the cylindrical portion of the rotating member that rotates at high speed and swirls at high speed inside the container. At this time, the object to be stirred existing inside the cylindrical portion of the rotating member is supplied from the plurality of holes penetrating in the inner and outer directions formed in the cylindrical portion of the rotating member to the space between the container and the rotating member (clearance portion) by the action of the centrifugal force added by the rotation of the rotating member. Furthermore, the object to be stirred supplied to the clearance portion adheres to the inner surface of the container and swirls in a thin film shape. As a result, a speed difference in swirling occurs between the surface side of the rotating member and the inner surface side of the container for the object to be stirred supplied between the container and the rotating member and formed into a thin film shape, and the object is stirred by receiving the shear force caused by this.

[0013] Here, as described above, the side surface of the cylindrical portion of the rotating member is divided into a first region that is divided into a strip shape in the circumferential direction of the cylindrical portion and has a plurality of holes penetrating in the inner and outer directions, and a second region that is divided into a strip shape in the circumferential direction of the cylindrical portion and has a plurality of holes penetrating in the inner and outer directions formed so as to be smaller than the aperture ratio of the first region. The first region is disposed in a portion including the center in the height direction of the cylindrical portion, and the second region is disposed from the upper end of the first region to the upper end of the cylindrical portion and from the lower end of the first region to the lower end of the cylindrical portion. When the width of the first region is Wp and the total height of the rotating member is H, 0 < Wp < 0.5H When the relationship of is satisfied, due to the centrifugal force applied by the rotating member, the object to be stirred supplied from the inside of the cylindrical portion of the rotating member to the clearance portion is concentratedly supplied from the holes formed in the first region disposed in a portion including the center in the height direction of the cylindrical portion among the plurality of holes penetrating in the inner and outer directions of the side surface of the cylindrical portion of the rotating member. As a result, in the clearance portion, the pressure of the object to be stirred existing in the portion facing the first region of the cylindrical portion of the rotating member becomes higher than the pressure of the object to be stirred existing in the portion facing the second region. Therefore, a flow is generated in which the object to be stirred moves from the center in the height direction of the cylindrical portion toward the upper end and the lower end of the cylindrical portion while swirling. As a result, the circulation of the object to be stirred between the inside of the cylindrical portion of the rotating member and the clearance portion is promoted, and the processing efficiency for the object to be stirred is improved. Further, in the clearance portion, a large friction occurs between the object to be stirred and the inner surface of the container and the rotating member due to a difference in swirling speed between the outside of the rotating member and the inner surface side of the container, generating high-temperature heat. However, as described above, when the circulation of the object to be stirred between the inside of the cylindrical portion of the rotating member and the clearance portion is promoted, the residence time of the object to be stirred in the clearance portion is reduced, and the temperature rise of the object to be stirred is suppressed. Here, if a plurality of convex portions are formed on the surface of the inner wall surface of the container so as to extend in the direction of the central axis of the container and protrude from the base portion of the inner wall surface of the container toward the center of the container and are arranged in the circumferential direction of the container, the above-described effects are enhanced by the synergistic effect with the rotating member. Furthermore, when the outer edge shape of the surface of the inner wall surface of the container in a cross section orthogonal to the central axis of the container is formed to include a concave portion connecting convex portions adjacent to each other, the synergistic effect with the rotating member is particularly enhanced, and the above-described effect is further enhanced.

[0014] Also, generally, in a thin-film swirling type stirring device, the aperture ratio of a plurality of holes formed in the cylindrical portion of the rotating member and penetrating in the inner and outer directions affects the shear force applied to the object to be stirred and the supply rate of the object to be stirred from the inside of the cylindrical portion of the rotating member to the clearance portion. Specifically, when the aperture ratio of the plurality of holes formed in the cylindrical portion and penetrating in the inner and outer directions becomes smaller, the shear force applied to the object to be stirred increases as the contact area between the cylindrical portion and the object to be stirred increases, whereas when the aperture ratio of the holes becomes larger, the shear force applied to the object to be stirred decreases as the contact area between the cylindrical portion and the object to be stirred decreases. On the other hand, when the aperture ratio of the plurality of holes formed in the cylindrical portion and penetrating in the inner and outer directions becomes smaller, the supply rate of the object to be stirred from the inside of the cylindrical portion of the rotating member to the clearance portion becomes smaller, whereas when the aperture ratio of the holes becomes larger, the supply rate of the object to be stirred increases. As described above, the shear force applied to the object to be stirred and the supply rate of the object to be stirred from the inside of the cylindrical portion of the rotating member to the clearance portion are in a trade-off relationship.

[0015] Here, as described above, when the aperture ratio of the plurality of holes in the first region is P1 and the aperture ratio of the plurality of holes in the second region is P2, 0 ≦ P2 / P1 < 0.5 and P1 > 0 When a second region with a small aperture ratio of a plurality of holes is arranged so as to satisfy the relationship, a large shearing force can be applied to the object to be stirred present in the clearance portion facing the second region, and sufficient stirring processing can be performed. On the other hand, in the second region, the aperture ratio of the plurality of holes is small, and the supply rate of the object to be stirred from the inside of the cylindrical portion of the rotating member to the clearance portion becomes small. In this regard, as described above, in the clearance portion, the pressure of the object to be stirred present in the portion facing the first region of the cylindrical portion of the rotating member is higher than the pressure of the object to be stirred present in the portion facing the second region. Therefore, it is covered by the occurrence of a flow in which the object to be stirred moves from the center in the height direction of the cylindrical portion toward the upper end and the lower end of the cylindrical portion while swirling. That is, the object to be stirred intensively supplied to the clearance portion from the holes formed in the first region disposed in the portion including the center in the height direction of the cylindrical portion of the rotating member is covered by being supplied to the clearance portion facing the second region by the flow of the object to be stirred moving toward the upper end and the lower end of the cylindrical portion.

[0016] Further, in the stirring device of the present invention, since the plurality of holes penetrating in the inner and outer directions of the first region of the cylindrical portion of the rotating member have the inner opening area of each hole larger than the outer opening area, the supply of the object to be stirred from the inside of the cylindrical portion of the rotating member to the clearance portion is promoted, and the pressure of the object to be stirred present in the portion facing the first region of the cylindrical portion of the rotating member in the clearance portion can be further increased. Thereby, the flow in which the object to be stirred moves from the center in the height direction of the cylindrical portion toward the upper end and the lower end of the cylindrical portion while swirling is promoted. As a result, the circulation of the object to be stirred performed between the inside of the cylindrical portion of the rotating member and the clearance portion is further promoted, and the effects of improving the processing efficiency for the object to be stirred, suppressing the temperature rise of the object to be stirred, and adding a large shearing force to the object to be stirred to perform sufficient stirring processing described above can be further enhanced.

[0017] Regarding a plurality of holes penetrating in the inner and outer directions of the first region of the cylindrical portion of the rotating member, as a method of making the inner opening area of each hole larger than the outer opening area, it is preferable to make the number of inner openings of each hole larger than the number of outer openings. More specifically, it is preferable to branch the penetration path of each hole inside the cylindrical portion of the rotating member.

[0018] In addition, in the stirring device of the present invention, it is preferable that the rotating member has a horizontal portion orthogonal to the rotation axis of the rotating member inside the cylindrical portion, and the inner space of the cylindrical portion is partitioned into an upper space and a lower space by the horizontal portion. In this way, when the inner space of the cylindrical portion is partitioned into an upper space and a lower space by the horizontal portion, the circulation of the object to be stirred that occurs between the inside of the rotating member and the clearance portion can be more reliably performed, and the effects of improving the processing efficiency for the object to be stirred described above, suppressing the temperature rise of the object to be stirred, and adding a large shearing force to the object to be stirred to perform sufficient stirring treatment can be more reliably exhibited.

[0019] At this time, the plurality of holes penetrating in the inner and outer directions of the first region are (1) the penetration path of each hole is branched inside the cylindrical portion, and the inner openings of each hole are respectively arranged in the upper space and the lower space, or (2) the holes with inner openings arranged in the upper space and the holes with inner openings arranged in the lower space are arranged so as to be alternately arranged in the circumferential direction of the cylindrical portion. With such a configuration, when the objects to be stirred existing in the upper space and the lower space are intensively supplied from the holes formed in the first region to the clearance portion, they are mixed with each other. As a result, it is possible to avoid the circulation of the object to be stirred between the inside of the cylindrical portion of the rotating member and the clearance portion being performed in a divided form on the upper space side and the lower space side, and the object to be stirred circulating in the upper space side and the lower space can be appropriately exchanged, and the circulation of the object to be stirred between the inside of the cylindrical portion of the rotating member and the clearance portion can be performed. Thereby, the effect of improving the processing efficiency for the object to be stirred described above, the effect of suppressing the temperature rise of the object to be stirred, and the effect of adding a large shear force to the object to be stirred and performing sufficient stirring treatment can be more surely exhibited.

[0020] Other features and advantages of the present invention will become more apparent from the following detailed description with reference to the accompanying drawings.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Mode for Carrying Out the Invention

[0022] Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings. As shown in FIGS. 1 and 2, the stirring device 1 includes a cylindrical container 2, an outer layer 4 to which a water-cooling pipe 6 for supplying and discharging cooling water is connected to the outer peripheral surface including the bottom surface of the container 2, a rotating member 800 (810, 820, 830) that can rotate at high speed concentrically with the container 2 with a slight gap s from the inner surface 22 of the container 2, a shaft 10 that supports the rotating member 800 at its end and can be driven to rotate forward and backward at high speed, an upper container 14 provided above the container 2 via a weir plate 12 and having a discharge pipe 13 for discharging the product, and a lid 16 for sealing the upper container 14. Supply pipes 17 and 18 for supplying raw materials are provided at the bottom of the container 2 via valves 19 and 20. In FIGS. 1 and 2, a plurality of holes, lids, valves, etc. penetrating in the inner and outer directions of the cylindrical portion (described later) of the rotating member 800 are omitted for convenience. As shown in FIG. 2, when the inner diameter of the container 2 is D and the outer diameter of the cylindrical portion is φ, the above gap s = (D - φ) / 2.

[0023] As shown in Fig. 2, the upper container 14 is provided with a cooling water chamber 15 to which cooling water is supplied on its circumferential surface. The weir plate 12 has an opening 11 so that the liquid to be treated (the object to be stirred) can be discharged from the outflow pipe 13.

[0024] Further, the rotating member 800 is adapted to be driven at a high speed with a peripheral speed of 10 to 50 m / sec. Furthermore, the stirring device 1 can also be evacuated through a valve by hermetically sealing the container 2, the upper container 14, the lid 16 and the shaft 10 with gaskets and providing a vacuum evacuation device. From the viewpoint of more effectively exhibiting the effects of the present invention, the rotating member 800 is preferably driven at a high speed with a peripheral speed of 20 to 50 m / sec, more preferably at a peripheral speed of 25 to 50 m / sec, and still more preferably at a peripheral speed of 30 to 50 m / sec.

[0025] Next, the operation of the high-speed stirring device according to the present embodiment will be described. Referring to Fig. 2, first, for setting the conditions of the liquid to be treated, the weir plate 12 for sealing the container 2 is installed. Next, a predetermined amount of the liquid to be treated L is introduced into the container 2 from the supply pipes 17 and 18. Then, the shaft 10 connected to a motor (not shown) is driven at a high speed to rotate the rotating member 800 at a high speed.

[0026] At this time, the liquid to be treated L is urged in the circumferential direction by the high-speed rotation of the rotating member 800 and rotates. Due to the centrifugal force generated by this rotation, the liquid to be treated L swirls in a thin-film cylindrical shape (including cases where a part does not become cylindrical) with a thickness t (average thickness) on the inner surface of the container 2. Further, the liquid to be treated L after stirring continuously flows into the upper container 14 over the weir plate 12 and is discharged out of the container 2 from the outflow pipe 13.

[0027] Next, the details of the rotating members used in the stirring device of the present invention and the stirring device of the comparative example will be described.

[0028] (Example 1) FIG. 3 shows the rotating member 800 of Example 1. FIG. 3(a) is a cross-sectional view of the rotating member 800, showing the cross-section taken along A-A in FIG. 3(b). FIG. 3(b) is a top view of the rotating member 800. FIG. 3(c) is a side view of the rotating member 800. As shown in FIG. 3, the rotating member 800 has a cylindrical portion 801. On the side surface of the cylindrical portion 801, as indicated by the dashed-dotted line in FIG. 3(c), a first region 803 is provided which is divided into a strip shape in the circumferential direction of the cylindrical portion and in which a plurality of holes 802 penetrating in the inner and outer directions of the cylindrical portion 801 are formed. Further, the first region 803 is provided so as to include the center in the height direction of the cylindrical portion 801. The upper end of the first region 803 is defined by the upper tangent line (the upper dashed-dotted line in FIG. 3(c)) of the opening edges of the plurality of holes 802 arranged on the side surface of the cylindrical portion 801, while the lower end of the first region 803 is defined by the lower tangent line (the lower dashed-dotted line in FIG. 3(c)) of the opening edges of the plurality of holes 802 arranged on the side surface of the cylindrical portion 801. The width Wp of the first region 803 is defined by the interval between the upper tangent line and the lower tangent line of the opening edges of the plurality of holes 802. Inside the first region 803, the interval between adjacent plurality of holes 802 and the interval between the columns in which the plurality of holes 802 are arranged are uniform. Also, in this embodiment, an example in which the plurality of holes 802 are arranged in one row inside the first region 803 is shown, but it is also allowed to have two or more rows as necessary. In this case, the upper end of the first region 803 is defined by the upper tangent line of the opening edges of the uppermost row of the plurality of holes 802, while the lower end of the first region 803 is defined by the lower tangent line of the opening edges of the lowermost row of the plurality of holes 802.

[0029] As shown in FIG. 3(c), on the side surface of the cylindrical portion 801, a second region 804 is arranged from the upper end (upper tangent line) of the first region 803 to the upper end of the side surface of the cylindrical portion 801 and from the lower end (lower tangent line) of the first region 803 to the lower end of the side surface of the cylindrical portion 801. In the second region 804, the plurality of holes 802 are formed such that the opening ratio of the plurality of holes 802 penetrating in the inner and outer directions is smaller than the opening ratio of the first region 803. In the example shown in FIG. 3, there is no opening (opening ratio = 0), but it is not limited to this. Note that the opening ratio P is P = S1 / S2 S1: The total opening area of the plurality of holes in the target region (the first region or the second region) S2: The sum of the areas of the target regions (the first region or the second region) is defined. Also, in this embodiment, the aperture ratios P of the second regions 804 on the upper side and the lower side are set to be the same, but it is also allowed to make them different as necessary.

[0030] The width Wn of the second region 804 is defined by the sum (Wn = Wn1 + Wn2) of the width Wn1 from the upper end of the first region 803 (the tangent line above the opening edge of the plurality of holes 802) to the upper end of the side surface of the cylindrical portion 801 and the width Wn2 from the lower end of the first region 803 (the tangent line below the opening edge of the plurality of holes 802) to the lower end of the side surface of the cylindrical portion 801. Also, the total height H of the rotating member is defined by the height of the side surface of the cylindrical portion 801, H = Wp + Wn satisfies the relationship.

[0031] Here, the width Wp of the first region satisfies 0 < Wp < 0.5H the relationship. In this embodiment, the widths Wn1 and Wn2 of the second regions 804 on the upper side and the lower side are set to be the same, but it is also allowed to make them different as necessary.

[0032] With the configuration of the rotating member 800 as described above, due to the centrifugal force applied by the rotating member 800, the stirring target supplied from the inside of the cylindrical portion 801 of the rotating member 800 to the clearance portion (see paragraph 0012) is intensively supplied from the holes 802 formed in the first region 803 disposed in a portion including the center in the height direction of the cylindrical portion 801 among the plurality of holes 802 of the cylindrical portion 801 of the rotating member 800. As a result, in the clearance portion, the pressure of the stirring target existing in the portion facing the first region 803 of the cylindrical portion 801 becomes higher than the pressure of the stirring target existing in the portion facing the second region 804. Therefore, as shown in FIG. 4, while the stirring target rotates, a flow occurs from the center in the height direction of the cylindrical portion 801 toward the upper end and the lower end directions of the cylindrical portion 801. Thereby, the circulation of the stirring target performed between the inside of the rotating member 800 shown in FIG. 4 and the clearance portion is promoted, and the processing efficiency for the stirring target is improved.

[0033] Generally, in the clearance portion, a difference in the swirling speed of the object to be stirred occurs between the rotating member 800 side and the inner surface side of the container 2, resulting in a large friction between the object to be stirred, the rotating member 800, and the inner surface of the container 2, and generating high-temperature heat. Therefore, when the circulation of the object to be stirred between the inside of the cylindrical portion 801 of the rotating member 800 and the clearance portion is promoted as described above, the residence time of the object to be stirred in the clearance portion decreases, and as shown in FIG. 4, a flow in which the relatively high-temperature object to be stirred Fh and the relatively low-temperature object to be stirred Fl are exchanged occurs, so that the temperature rise of the object to be stirred is suppressed.

[0034] The width Wp of the first region is Preferably, 0 < Wp < 0.3H More preferably, 0 < Wp < 0.2H Even more preferably, 0 < Wp < 0.1H When the relationship is satisfied, the effect of improving the processing efficiency for the object to be stirred and the effect of suppressing the temperature rise of the object to be stirred are further enhanced. On the other hand, when the width Wp of the first region becomes excessively small, the supply of the object to be stirred from the hole 802 formed in the first region 803 to the clearance portion is inhibited. Therefore, the width Wp of the first region is Preferably, Wp > 0.01H More preferably, Wp > 0.02H Even more preferably, Wp > 0.03H It is desirable to satisfy the relationship.

[0035] In general, in a thin-film swirling type stirring device, the aperture ratio P of the plurality of holes 802 formed in the cylindrical portion 801 affects the shear force applied to the object to be stirred and the supply rate of the object to be stirred from the inside of the rotating member to the clearance portion. Specifically, when the aperture ratio P of the plurality of holes 802 formed in the cylindrical portion 801 becomes smaller, the shear force applied to the object to be stirred increases as the contact area between the cylindrical portion 802 and the object to be stirred increases. On the other hand, when the aperture ratio P of the holes becomes larger, the shear force applied to the object to be stirred decreases as the contact area between the cylindrical portion 801 and the object to be stirred decreases. On the other hand, when the aperture ratio P of the plurality of holes 802 formed in the cylindrical portion 801 becomes smaller, the supply rate of the object to be stirred from the inside of the cylindrical portion 801 of the rotating member 800 to the clearance portion becomes smaller. On the other hand, when the aperture ratio of the holes becomes larger, the supply rate of the object to be stirred increases. As described above, the shear force applied to the object to be stirred and the supply rate of the object to be stirred from the inside of the cylindrical portion 801 of the rotating member 800 to the clearance portion are in a trade-off relationship. Therefore, in this embodiment, when the aperture ratio of the plurality of holes 802 in the first region 803 is P1 and the aperture ratio of the plurality of holes 802 in the second region 804 is P2, 0 ≦ P2 / P1 < 0.5 and P1 > 0 it is set to satisfy the relationship. In this way, when the second region 804 with a small aperture ratio of the plurality of holes 802 is arranged, a large shear force can be applied to the object to be stirred existing in the clearance portion facing the second region 804, and sufficient stirring treatment can be performed.

[0036] On the other hand, in the second region 804, the opening ratio of the plurality of holes 802 is small, and the supply rate of the object to be agitated from the inside of the cylindrical portion 801 of the rotating member 800 to the clearance portion becomes small. However, as described above, in the clearance portion, the pressure of the object to be agitated existing in the portion facing the first region 803 of the cylindrical portion 801 of the rotating member 800 is higher than the pressure of the object to be agitated existing in the portion facing the second region 804. Therefore, as shown in FIG. 4, while the object to be agitated swirls, a flow is generated that moves from the center in the height direction of the cylindrical portion 801 toward the upper end and the lower end of the cylindrical portion 801, respectively, and thus it is covered. That is, the object to be agitated intensively supplied from the holes 802 formed in the first region 803 disposed in the portion including the center in the height direction of the cylindrical portion 801 of the rotating member 800 to the clearance portion is covered by being supplied to the clearance portion facing the second region 804 by the flows moving toward the upper end and the lower end of the cylindrical portion 801, respectively.

[0037] Also, in the present embodiment, in the plurality of holes 802 penetrating in the inner and outer directions of the first region 803 of the cylindrical portion 801 of the rotating member 800, the inner opening area of each hole is larger than the outer opening area (see FIG. 3(a)). Therefore, the supply of the object to be agitated from the inside of the cylindrical portion 801 of the rotating member 800 to the clearance portion is promoted, and the pressure of the object to be agitated existing in the portion facing the first region 803 of the cylindrical portion 801 of the rotating member 800 in the clearance portion can be further increased. As a result, the flow in which the object to be agitated moves from the center in the height direction of the cylindrical portion 801 toward the upper end and the lower end of the cylindrical portion while swirling is promoted. As a result, the circulation of the object to be agitated between the inside of the cylindrical portion 801 of the rotating member 800 and the clearance portion is further promoted, and the effects of improving the processing efficiency for the object to be agitated, suppressing the temperature rise of the object to be agitated, and being able to apply a large shear force to the object to be agitated to perform sufficient agitation processing described above can be further enhanced. In order to enhance the effects of the present invention described above, the opening ratios of the plurality of holes 802 in the first region 803 and the second region 804 are preferably, 0 ≦ P2 / P1 < 0.25 and P1 > 0 More preferably, 0 ≦ P2 / P1 < 0.1 and P1 > 0 Even more preferably, 0 ≦ P2 / P1 < 0.05 and P1 > 0 It is desirable to set it so as to satisfy the relationship of

[0038] Regarding the plurality of holes 802 penetrating in the inner and outer directions of the first region 803 of the rotating member 800, as a method of making the inner opening area of each hole larger than the outer opening area, in this embodiment, the number of inner openings of each hole is made larger than the number of outer openings. Specifically, in the respective holes, the through-path 805 branches inside the cylindrical portion 801, the number of inner openings is 2, while the number of outer openings is 1.

[0039] Also, in this embodiment, the rotating member 800 has a horizontal portion 806 orthogonal to the rotation axis of the rotating member 800 inside the cylindrical portion 801, and the inner space of the cylindrical portion 801 is partitioned into an upper space 807 and a lower space 808 by the horizontal portion 806. As described above, when the inner space of the cylindrical portion 801 is partitioned into an upper space and a lower space by the horizontal portion 806, the circulation of the object to be stirred between the inside of the cylindrical portion 801 of the rotating member 800 and the clearance portion is more surely performed, and the processing efficiency of making the object to be stirred as described above is improved, the effect of suppressing the temperature rise of the object to be stirred, and the effect of adding a large shearing force to the object to be stirred so as to perform sufficient stirring treatment can be more surely exhibited. In addition, it is preferable that the partition of the upper space 807 and the lower space 808 by the horizontal portion 806 isolates the upper space 807 and the lower space 808 and blocks the flow of the object to be stirred through the horizontal portion 806. In the illustrated example, the horizontal portion 806 includes a boss 28 that abuts on the shaft 10.

[0040] Also, in this embodiment, the inner openings of the plurality of holes 802 penetrating in the inner and outer directions of the first region 803 are respectively arranged in the upper space 807 and the lower space 808, and the opening through-path 805 connecting these two inner openings and one outer opening is joined inside the cylindrical portion 801. Therefore, when the objects to be stirred existing in the upper space and the lower space are respectively supplied from the holes formed in the first region to the clearance portion, they can be mixed with each other. As a result, it is possible to avoid the circulation of the object to be stirred between the inside of the cylindrical portion 801 of the rotating member 800 and the clearance portion being performed in a divided form on the upper space 807 side and the lower space 808 side, and the circulation of the object to be stirred in the inner side of the rotating member and the clearance portion can be performed in such a way that the objects to be stirred circulating in the upper space 807 and the lower space 808 are appropriately exchanged. As a result, the effects of improving the processing efficiency for the object to be stirred, suppressing the temperature rise of the object to be stirred, and adding a large shear force to the object to be stirred to perform sufficient stirring processing, which are described above, can be more surely exhibited. Furthermore, FIG. 13 shows the structure of the surface of the inner wall surface of the container 2 of Example 1. FIG. 13(a) is an enlarged schematic view of the state when the surface of the inner wall surface of the container 2 is viewed from the front, and FIG. 13(b) is an enlarged schematic view of a cross section orthogonal to the central axis (T direction in the figure) of the container 2. As shown in FIG. 13(a), the convex portion 900 is formed to extend in the central axis direction of the container. Also, as shown in FIG. 13(b), the convex portion 900 is formed to protrude from the base portion 901 of the inner wall surface of the container 2 in the central direction (C direction in the figure) of the container 2. Further, as shown in FIG. 13(b), an arcuate concave portion 902 is formed between adjacent convex portions 900. The concave portion 902 is formed such that the inner peripheral surface recedes from the center direction of the container 2 toward the base portion 901. As a result, the outer edge shape of the surface of the inner wall surface of the container 2 is formed to include the arcuate concave portion 902 that connects the convex portions 900 adjacent to each other. Since the effect of the rotating member 800 described above is further enhanced, it can be said that the synergistic effect of the rotating member 800, the convex portion 900, and the concave portion 902 is effectively exhibited. Further, as shown in FIG. 13(C), the tip of the convex portion 900 may be flat, and although not shown, the tip of the convex portion 900 may have a shape with an R (rounded). However, from the viewpoint of more surely exhibiting the effects of the present invention, the tip of the convex portion 900 is preferably sharp. In FIGS. 13(b) and (c), an example in which the concave portion 902 is formed in an arcuate (curved) shape is shown. Instead of this, the concave portion 902 can be formed in a rectangular line or a refracted line (straight line), or a configuration in which these curves and straight lines are mixed can also be adopted. However, from the viewpoint of more effectively exhibiting the effects of the present invention, it is preferable that the concave portion 902 is formed in an arcuate (curved) shape. As shown in FIGS. 13(a), (b), and (c), the convex portions 900 and the concave portions 902 are formed by arranging a plurality of them in the circumferential direction of the container 2. In this embodiment, an example in which the convex portion 900 extends over substantially the entire height of the inner wall surface of the container 2 in the central axis direction (T direction in the figure) of the container 2 is shown. However, as shown in FIG. 14(a), the phase in which the convex portions 900 are arranged can be changed at the upper and lower portions of the inner wall surface, or as shown in FIG. 14(b), the convex portions 900 can be formed neither at the upper portion nor at the lower portion of the inner wall surface, or both. Further, although not shown, the portion of the inner wall surface of the container 2 where the convex portion 900 is not formed is not limited to either the upper portion or the lower portion, and can also be formed between the upper and lower portions, or the convex portion 900 can be formed to be divided into two or more regions in the central axis direction of the container 2. In addition, in this embodiment, an example is shown in which the convex portion 900 is formed to extend parallel to the central axis direction of the container (the T direction in the figure). However, the present invention is not limited to this. As shown in FIGS. 14(c) and (d), the convex portion 900 may be formed to extend so as to be inclined with respect to the central axis direction of the container. From this, the "extension with respect to the central axis direction of the container" as used in the present application includes not only the case where the convex portion extends parallel to the central axis direction of the container (the T direction in the figure), but also the case where the convex portion extends so as to be inclined with respect to the central axis direction of the container. Note that the synergistic effect of the above-described rotating member 800, convex portion 900, and concave portion 902 is also valid in the following respective embodiments.

[0041] (Embodiment 2) FIG. 5 shows the rotating member 810 of Embodiment 2. FIG. 5(a) is a cross-sectional view of the rotating member 810, showing the cross-section at A-A in FIG. 5(b). FIG. 5(b) is a top view of the rotating member 810. FIG. 5(c) is a side view of the rotating member 810. Further, FIG. 6 is a cross-sectional view of the rotating member 810, showing the cross-section at B-B in FIG. 5(b).

[0042] The rotating member 810 is the same as the rotating member 800 of Example 1, except that the structure and arrangement of the plurality of holes 802 penetrating in the inner and outer directions of the first region 803 are different from those of the rotating member 800 of Example 1. Specifically, in the rotating member 810, the inner openings of the plurality of holes 802 are respectively arranged in the upper space 807 and the lower space 808, but the through-path 805 is not connected inside the cylindrical portion 801, and the inner openings and the outer openings are connected one-to-one. Further, the inner openings of the plurality of holes 802 are provided so as to open obliquely on the inclined portion 811 of the cylindrical portion 801, whereby the inner opening area of each hole 802 is larger than the outer opening area. Furthermore, as shown in FIG. 5(c), the plurality of holes 802 penetrating in the inner and outer directions are arranged such that the holes with the inner openings arranged in the upper space 807 and the holes with the inner openings arranged in the lower space 808 are alternately arranged in the circumferential direction of the cylindrical portion 801. With the above configuration, the effects described above, namely, the effect of improving the processing efficiency for the object to be stirred, the effect of suppressing the temperature rise of the object to be stirred, and the effect of being able to perform sufficient stirring treatment by applying a large shearing force to the object to be stirred, can be manifested.

[0043] (Example 3) FIG. 7 shows the rotating member 820 of Example 3. FIG. 7(a) is a cross-sectional view of the rotating member 820, showing the cross-section at A-A in FIG. 7(b). FIG. 7(b) is a top view of the rotating member 820. FIG. 7(c) is a side view of the rotating member 820. Further, FIG. 8 is a cross-sectional view of the rotating member 820, showing the cross-section at B-B in FIG. 7(b).

[0044] The rotating member 820 is the same as the rotating member 810 of Example 2, except that the structure and arrangement of the plurality of holes 802 penetrating in the inner and outer directions of the first region 803 are different from those of the rotating member 810 of Example 2. Specifically, the through-path 805 connecting the inner-direction opening and the outer-direction opening of the plurality of holes 802 obliquely penetrates through the cylindrical portion 801. As shown in FIG. 7(c), among the plurality of holes 802 penetrating in the inner and outer directions, the holes with the inner-direction opening arranged in the upper space 807 and the holes with the inner-direction opening arranged in the lower space 808 are arranged alternately on the same line with respect to the circumferential direction of the cylindrical portion 801. With the above configuration, the effects described above, namely, the effect of improving the processing efficiency for the object to be stirred, the effect of suppressing the temperature rise of the object to be stirred, and the effect of being able to perform sufficient stirring processing by applying a large shear force to the object to be stirred, can be manifested.

[0045] (Example 4) FIG. 9 shows the rotating member 830 of Example 4. FIG. 9(a) is a cross-sectional view of the rotating member 830, showing the cross-section at A-A in FIG. 9(b). FIG. 9(b) is a top view of the rotating member 830. FIG. 9(c) is a side view of the rotating member 830. Example 4 includes a container and a rotating member that rotates at high speed slightly inside the inner wall surface of this container, and is a stirring device that stirs a stirring target that exists in a film shape between the rotating member and the inner wall surface by the centrifugal force generated by the rotating member. The rotating member has a cylindrical portion positioned via a slight gap with respect to the inner wall surface of the container, and has a horizontal portion orthogonal to the rotation axis of the rotating member inside the cylindrical portion. The inner space of the cylindrical portion is partitioned into an upper space and a lower space by the horizontal portion. The side surfaces facing the upper space and the lower space of the cylindrical portion are each partitioned in a band shape in the circumferential direction of the cylindrical portion, and are composed of a first region in which a plurality of holes penetrating in the inner and outer directions are formed, and a second region that is partitioned in a band shape in the circumferential direction of the cylindrical portion and in which the plurality of holes penetrating in the inner and outer directions are formed so as to be smaller than the aperture ratio of the first region or are non-porous. The first region is disposed on the side surfaces of the upper space and the lower space of the cylindrical portion on the side of the horizontal portion respectively, and the second region is disposed from the upper end of the first region on the side surface of the upper space of the cylindrical portion to the upper end of the cylindrical portion and from the lower end of the first region on the side surface of the lower space of the cylindrical portion to the lower end of the cylindrical portion respectively. The plurality of holes formed in the first region are arranged on three or fewer rows in the circumferential direction of the cylindrical portion. This is a stirring device characterized by this.

[0046] FIG. 10 is a cross-sectional view of the rotating member 830, showing the cross-section at B-B in FIG. 9(b). As shown in FIG. 9, the rotating member 830 has a cylindrical portion 801, and inside the cylindrical portion 801, it has a horizontal portion 806 orthogonal to the rotation axis of the rotating member 830. The inner space of the cylindrical portion 801 is partitioned into an upper space 807 and a lower space 808 by the horizontal portion 806. On the side surface of the cylindrical portion 801 of the rotating member 830, as shown by the dashed-dotted line in FIG. 9(c), a first region 803 is provided that is partitioned in a band shape in the circumferential direction of the cylindrical portion and in which a plurality of holes 802 penetrating in the inner and outer directions of the cylindrical portion 801 are formed. The first region 803 is disposed on the side surfaces of the upper space 807 and the lower space 808 of the cylindrical portion 801 on the side of the horizontal portion (the central side in the height direction of the cylindrical portion 801) respectively.

[0047] The upper end of the first region 803 on the side surface of the upper space 807 of the cylindrical portion 801 is defined by the upper tangent line (the upper dashed line in FIG. 9(c)) of the opening edges of the plurality of holes 802 arranged on the side surface of the cylindrical portion 801. On the other hand, the lower end of the first region 803 is defined by the height position (the lower dashed line in FIG. 9(c)) with reference to the surface on the upper space 807 side of the horizontal portion 806. The width Wp1 of the first region 803 on the side surface of the upper space 807 of the cylindrical portion 801 is defined by the interval between the upper tangent line of the opening edges of the plurality of holes 802 and the height position with reference to the surface on the upper space 807 side of the horizontal portion 806. Within the first region 803, the intervals between adjacent ones of the plurality of holes 802 and the intervals between the columns in which the plurality of holes 802 are arranged are uniform.

[0048] The lower end of the first region 803 on the side surface of the lower space 808 of the cylindrical portion 801 is defined by the lower tangent line (the lower dashed line in FIG. 9(c)) of the opening edges of the plurality of holes 802 arranged on the side surface of the cylindrical portion 801. On the other hand, the upper end of the first region 803 is defined by the height position (the upper dashed line in FIG. 9(c)) with reference to the surface on the lower space 808 side of the horizontal portion 806. The width Wp2 of the first region 803 on the side surface of the lower space 808 of the cylindrical portion 801 is defined by the interval between the upper tangent line of the opening edges of the plurality of holes 802 and the height position with reference to the surface on the lower space 808 side of the horizontal portion 806. Within the first region 803, the intervals between adjacent ones of the plurality of holes 802 and the intervals between the columns in which the plurality of holes 802 are arranged are uniform. In this embodiment, the widths Wp1 and Wp2 of the first region 803 on the side surface of the upper space 807 and the side surface of the lower space 808 of the cylindrical portion 801 are set to be the same, but it is also allowed to make them different as needed. Also, in this embodiment, an example in which the plurality of holes 802 are arranged in one row within the first region 803 is shown, but it is also allowed to arrange them in two or more rows as needed. In this case, the upper end of the first region 803 is defined by the upper tangent line of the opening edges of the uppermost row of the plurality of holes 802, while the lower end of the first region 803 is defined by the lower tangent line of the opening edges of the lowermost row of the plurality of holes 802.

[0049] As shown in FIG. 9(c), on the side surface of the cylindrical portion 801, from the upper end of the first region 803 on the side surface of the upper space 807 to the upper end of the side surface of the cylindrical portion 801, and from the lower end of the first region 803 on the side surface of the lower space 808 to the lower end of the side surface of the cylindrical portion 801, second regions 804 are respectively arranged. In the second region 804, a plurality of holes 802 penetrating in the inner and outer directions are formed such that the aperture ratio of the plurality of holes 802 is smaller than the aperture ratio of the first hole formation region 803. In the example shown in FIG. 3, there is no opening (aperture ratio = 0), but it is not limited thereto. The aperture ratio P is P = S1 / S2 S1: The total opening area of the plurality of holes in the target region (the first region or the second region) S2: The total area of the target region (the first region or the second region) defined by. Also, in this embodiment, the aperture ratios P of the first region 803 and the second region 804 on the side surfaces of the upper space 807 and the lower space 808 of the cylindrical portion 801 are set to be the same, but it is also allowed to make them different as necessary.

[0050] The width of the second region 804 is defined by the width Wn1 from the upper end of the first region 803 on the side surface of the upper space 807 (the tangent line above the opening edge of the uppermost row of the plurality of holes 802) to the upper end of the side surface of the cylindrical portion 801, or the width Wn2 from the lower end of the first region 803 on the side surface of the lower space 808 (the tangent line below the opening edge of the lowermost row of the plurality of holes 802) to the lower end of the side surface of the cylindrical portion 801, respectively. In this embodiment, the widths Wn1 and Wn2 of the second region 804 on the side surfaces of the upper space 807 and the lower space 808 of the cylindrical portion 801 are set to be the same, but it is also allowed to make them different as necessary. Also, in this embodiment, an example in which a plurality of holes 802 are arranged in one row within each first region 803 is shown, but it is also allowed to make them two or more rows as necessary, and it is sufficient if they are arranged on three or fewer rows. Preferably, the plurality of holes formed in the first region 803 are preferably arranged on two or fewer rows in the circumferential direction of the cylindrical portion 801, and more preferably arranged on one row.

[0051] (Example 5) When various stirring targets were processed using the stirring device 1 of Examples 1 to 4, it was confirmed that the stirring device 1 of the present invention is suitable for a stirring target containing any of metal oxides (titanium oxide, aluminum oxide, zinc oxide, iron oxide, nickel oxide, yttrium oxide, iridium oxide, silver oxide, zirconium oxide, lanthanum oxide, lead oxide, cesium oxide, cerium oxide, chromium oxide, cobalt oxide, copper oxide, calcium oxide, tin oxide, bismuth oxide), viscous compounds, platinum-supported carbon, platinum alloy-supported carbon, carbon nanotubes, metal powders (gold, silver, copper, nickel, tin, zinc, aluminum, bismuth, antimony), mica, cellulose nanofibers, carbon black, graphene, graphite. In addition to the above substances, it has also been confirmed that the stirring device 1 of the present invention is suitable for a stirring target containing a LiB active material. For example, a cathode active material having an olivine-type structure and represented by the composition formula LiFe 1-X M x PO 4 :[wherein M is at least one selected from the group consisting of Ni, Co, Mn, Ti, Zr, and Mo, and x is 0 ≦ x < 1], and the surface of the cathode active material is coated with carbon, and lithium salts of mainly transition metal oxides are used. For example, layered rock salt-type and spinel-type lithium-containing metal oxides can be used as the cathode active material. Specific compounds of the layered rock salt-type cathode active material include lithium cobaltate, lithium nickelate, and NCM {Li(Ni x ,Co y ,Mn z ), x + y + z = 1} and NCA {Li(Ni 1-a-b Co a Al b ), etc. Examples of the spinel-type cathode active material include lithium manganate Also, lithium aluminum titanium phosphate Li 1+x Al xTi 2-x (PO 4 ) 3 (LATP) electrolyte, it has been confirmed that the stirring device 1 of the present invention is also suitable for the object to be stirred containing the same. In addition to the above substances, lithium titanate, ×-Li3PS4 (LPS) electrolyte, Si (silicon), nanosilicon, SiO (silicon monoxide), SiO2 (silica (silicon dioxide)), silver iodide, aluminum diboride, aluminum hydroxide, aluminum nitride, barium molybdate, barium nitride, barium sulfate, barium titanate, beryllium carbide, beryllium nitride, calcium aluminate, calcium oxide, iron disulfide trisulfide, lead acetate, lead carbonate, liposome, magnesium aluminate, magnesium hydroxide, cesium fluoride, cerium fluoride, copper sulfide, silver bromide, potassium bromide, potassium carbonate, trilithium phosphate, sulfur, it has been confirmed that the stirring device 1 of the present invention is also suitable for the object to be stirred containing any one of them. In addition, not only the object to be stirred containing any one of the above substances alone, but also the object to be stirred containing a mixture of two or more of the above substances, it has been confirmed that the stirring device 1 of the present invention is suitable. Note that, for the object to be stirred containing any one of the above substances alone and the object to be stirred containing a mixture of two or more of the above substances, even when the convex portion 900 and the concave portion 902 are not formed on the inner wall surface of the container 2 in the stirring device 1 of the present invention, it is suitable, but it is preferable in that it becomes more suitable when the convex portion 900 and the concave portion 902 are formed on the inner wall surface of the container 2 as in the stirring device 1 of the present invention.

[0052] (Example 6) The outer diameters of the rotating members 800, 810, 820, and 830 used in the stirring device 1 of Examples 1 to 4 are continuously or stepwise changed in any height direction as shown in FIGS. 15(a) to (b), and the clearance between the inner wall surface (side surface) of the container 2 and the rotating members 800, 810, 820, and 830 can also be continuously or stepwise changed. In FIGS. 15(a) to 15(b), a mode is shown in which the intervals of the clearance portions at the central portions in the height direction of the rotating members 800, 810, 820, and 830 are narrowed. However, the intervals of the clearance portions at the central portions can also be made wider than the intervals of the other clearance portions. Also, in FIGS. 15(a) to 15(b), a mode is shown in which the intervals of the clearance portions change linearly. However, the intervals can also be changed curvilinearly, or the intervals of the clearance portions can be changed by combining a straight line and a curve. Further, as shown in FIGS. 15(c) to 15(d), the inner diameter of the inner wall surface of the container 2 used in the stirring devices 1 of the first to fourth embodiments can be continuously or stepwise changed in any height direction, so that the clearance portions can be continuously or stepwise changed. In FIGS. 15(c) to 15(d), a mode is shown in which the intervals of the clearance portions at the central portions in the height direction of the rotating members 800, 810, 820, and 830 are narrowed. However, the intervals of the clearance portions at the central portions can also be made wider than the intervals of the other clearance portions. Also, in FIGS. 15(c) to 15(d), a mode is shown in which the intervals of the clearance portions change linearly. However, the intervals can also be changed curvilinearly, or the intervals of the clearance portions can be changed by combining a straight line and a curve. Furthermore, both the outer diameters of the rotating members 800, 810, 820, and 830 used in the stirring devices 1 of the first to fourth embodiments and the inner diameter of the inner wall surface of the container 2 used in the stirring devices 1 of the first to fourth embodiments can be continuously or stepwise changed in any height direction. In this case, not only the configuration in which the clearance portions are continuously or stepwise changed, but also as shown in FIGS. 16(a) to 16(b), the intervals of the clearance portions can be made substantially constant without changing, and the clearance portions can be displaced in the radial direction of the container 2 or inclined in the central axis direction of the container. In FIGS. 16(a) to (b), the clearance portions at the central portions in the height direction of the rotating members 800, 810, 820, and 830 are shown to be located radially outward of the container 2 with respect to the other clearance portions. However, the clearance portions at the central portions can also be located radially inward of the container 2 with respect to the other clearance portions. The relationship between the positions of the first region 803 and the second region 804 in which a plurality of holes 802 penetrating in the inner and outer directions of the cylindrical portion 801 of the rotating members 800, 810, 820, and 830 are formed, and the narrow / wide width of the clearance portion is not particularly limited. However, if the first region 803 is arranged to face the narrowest region or the widest region of the width of the clearance portion, an optimal treatment according to the properties of the substance contained in the stirring treatment target can be performed, and it is preferable in that the effects of the present invention can be further enhanced. Also, the relationship between the positions of the convex portion 900 and the concave portion 902 on the inner wall surface of the container 2 and the narrow / wide width of the clearance portion is not particularly limited. However, if the convex portion 900 and the concave portion 902 on the inner wall surface of the container 2 are arranged to face the narrowest region or the widest region of the width of the clearance portion, an optimal treatment according to the properties of the substance contained in the stirring treatment target can be performed, and it is preferable in that the effects of the present invention can be further enhanced. Furthermore, the relationship between the positions of the first region 803 and the second region 804 in which a plurality of holes 802 penetrating in the inner and outer directions of the cylindrical portion 801 of the rotating members 800, 810, 820, and 830 are formed, the positions of the convex portion 900 and the concave portion 902 on the inner wall surface of the container 2, and the narrow / wide width of the clearance portion is not particularly limited. However, if the first region 803 and the convex portion 900 and the concave portion 902 on the inner wall surface of the container 2 are arranged to face the narrowest region or the widest region of the width of the clearance portion, respectively, an optimal treatment according to the properties of the substance contained in the stirring treatment target can be performed, and it is preferable in that the effects of the present invention can be further enhanced.

[0053] (Comparative Example) Figure 11 shows the rotating member 8 of the comparative example. Fig. 11(a) is a cross-sectional view of the rotating member 8, showing the cross-section at A-A in Fig. 11(b). Fig. 11(b) is a top view of the rotating member 8. Fig. 11(c) is a side view of the rotating member 8. In the rotating member 8, the side surface of the cylindrical portion 24 of the rotating member 8 is not partitioned into a first region and a second hole forming region, and a plurality of holes 30 penetrating in the inner and outer directions are formed over substantially the entire side surface of the cylindrical portion 24 except for the portion including the center in the height direction of the cylindrical portion 24. Further, the rotating member 8 has a through hole 32 formed in the horizontal portion 26, and the upper space 81 and the lower space 82 communicate with each other. It should be noted that this comparative example is not prior art with respect to the present invention.

[0054] According to the rotating member 8, the object to be stirred supplied from the inside of the cylindrical portion 24 of the rotating member 8 to the clearance portion is supplied relatively evenly from a plurality of holes 30 penetrating in the inner and outer directions over substantially the entire side surface of the cylindrical portion 24. For this reason, in this comparative example, the flow in which the object to be stirred moves from the center in the height direction of the cylindrical portion toward the upper end and the lower end of the cylindrical portion while swirling as in the embodiment is not promoted, and as shown in Fig. 12, turbulent flow occurs in the clearance portion. As a result, in this comparative example, the effects of improving the processing efficiency of the object to be stirred, suppressing the temperature rise of the object to be stirred, and adding a large shearing force to the object to be stirred to perform sufficient stirring treatment cannot be fully exhibited.

[0055] The stirring device according to the present invention is not limited to the above-described embodiment. The specific configuration of each part of the stirring device according to the present invention can be freely designed and changed in various ways.

Explanation of reference numerals

[0056] 1 Stirring device 2 Container 4 Outer layer 6 Water-cooling pipe 8, 800, 810, 820 Rotating member 10 Shaft 12 Weir plate 13 Discharge pipe 14 Upper container 16 lid 17, 18 supply pipes 19, 20 valves 22 inner surface of the container 24, 801 cylindrical parts 26, 806 horizontal parts 28 boss 30 small holes 32 through holes 81, 807 upper spaces 82, 808 lower spaces 803 first region 804 second region 805 through path 811 inclined part

Claims

1. A stirring device comprising a container and a rotating member that rotates at high speed slightly inside an inner wall surface of the container, and stirs a stirring target that is present in a film-like form between the rotating member and the inner wall surface by centrifugal force of the rotating member, The rotating member is A cylindrical portion is positioned on an inner wall surface of the container via a small gap, The side surface of the cylindrical portion is a first region that is partitioned in a band shape in the circumferential direction of the cylindrical portion and has a plurality of holes that penetrate in an inward and outward direction; a second region that is partitioned in a band shape in the circumferential direction of the cylindrical portion, and has a plurality of holes penetrating in an inward and outward direction formed so that the opening ratio of the first region is smaller than that of the first region, or the second region is non-perforated; The first region is disposed in a portion including a center in a height direction of the cylindrical portion, The second region is disposed from an upper end of the first region to an upper end of the tubular portion and from a lower end of the first region to a lower end of the tubular portion, When the width from the upper end to the lower end of the first region is Wp and the total height of the cylindrical portion is H, 0<Wp<0.5H Fulfilling the relationship, The surface of the inner wall of the container is The container is formed to extend in a direction parallel to a central axis of the container, and A protrusion protruding from a base portion of an inner wall surface of the container toward a center of the container, A plurality of the grooves are arranged in the circumferential direction of the container. A stirring device characterized by:

2. The outer edge shape of the surface of the inner wall surface of the container in a cross section perpendicular to the central axis of the container is 2. The stirring device according to claim 1, wherein the stirring device is formed to include recesses that connect the protrusions and adjacent protrusions.

3. When the aperture ratio of the first region is P1 and the aperture ratio of the second region is P2, 0≦P2 / P1<0.5 and P1>0 2. The mixing device according to claim 1, wherein the following relationship is satisfied:

4. 2. The stirring device according to claim 1, wherein the opening area of ​​each of the plurality of holes penetrating the first region in the inward and outward directions is greater than the opening area of ​​each of the holes in the outward direction.

5. 2. The stirring device according to claim 1, wherein the number of openings in the inward direction of each of the plurality of holes penetrating in the inward and outward direction of the first region is greater than the number of openings in the outward direction of each of the plurality of holes.

6. 6. The stirring device according to claim 5, wherein the through-paths of the individual holes penetrating inward and outward directions of the first region are branched within the cylindrical portion.

7. The stirring device described in claim 1, characterized in that the rotating member has a horizontal portion inside the cylindrical portion that is perpendicular to the rotation axis of the rotating member, and the internal space of the cylindrical portion is divided into an upper space and a lower space by the horizontal portion.

8. The plurality of holes penetrating in the inward and outward direction of the first region have through-paths of the individual holes branched within the cylindrical portion, 8. The stirring device according to claim 7, wherein the inward openings of the individual holes are disposed in the upper space and the lower space, respectively.

9. The stirring device described in claim 7, characterized in that the multiple holes penetrating inward and outward directions of the first region are arranged so that holes whose inward openings are located in the upper space and holes whose inward openings are located in the lower space are arranged alternately in the circumferential direction of the cylindrical portion.

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