stirring device

Abstract

To provide a stirring device capable of producing a slurry in which linear carbon such as CNT is uniformly mixed and dispersed. [Solution] This is a thin film swirling type agitator, and the side surface of the cylindrical portion is composed of a first region, which is partitioned in a band shape around the circumferential direction of the cylindrical portion and has a plurality of holes penetrating in an inward and outward direction, and a second region, which is partitioned in a band shape around 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 holes is smaller than that of the first region, or the second region is non-porous. The first region is located in a portion including the center in the height direction of the cylindrical portion, and the second region is located 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

Description

[Technical Field]

[0001] The present invention relates to an agitation device for carrying out emulsification and dispersion treatment, and relates to a device used, for example, for producing a slurry containing a conductive material. [Background technology]

[0002] Demand for batteries, such as lithium-ion secondary batteries and fuel cells, is expected to increase in the future, not only as power sources for portable electronic devices, but also for electric vehicles, storing electricity generated by wind and solar power generation facilities, etc. In addition to further improving the characteristics of the batteries themselves, such as miniaturization, weight reduction, and safety, there is also a demand for efficient and low-cost production of batteries with these characteristics.

[0003] One effective solution to this problem is the high-speed mixer disclosed in Patent Document 1. This high-speed mixer has a rotating shaft concentrically installed within a cylindrical mixing vessel, with rotating blades slightly smaller in diameter than the mixing vessel attached to the rotating shaft. The high-speed rotation of the rotating blades stirs the liquid being treated while spreading it into a thin cylindrical film on the inner surface of the mixing vessel. The rotating blades have a porous cylindrical portion on the outer periphery, with multiple small holes drilled radially through the cylindrical body. This high-speed mixer has the advantage of being able to provide excellent mixing performance despite its simple structure, consisting of a cylindrical body with multiple small holes drilled in it. Furthermore, because there is no surface that collides with the liquid being treated, there is little wear even when treating a liquid containing solid components, and there is little risk of metal components from the rotating blades being mixed into the liquid being treated.

[0004] Furthermore, the agitator system disclosed in Patent Document 2 uses the high-speed agitator of Patent Document 1, and using this agitator system to produce paint for battery electrodes has the advantage of efficiently producing paint for electrodes that is suitable for improving the performance of batteries while maintaining a high level of battery safety. In particular, 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 uniformly mixed and dispersed slurry. 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 small holes provided so as to penetrate in the radial direction of the porous cylindrical portion (cylindrical portion) of the rotary blade (rotating member) (Patent Document 3). Specifically, the inventors of the present invention have found that by adopting a configuration such as "a thin-film swirling type stirring device, wherein the side surface of the cylindrical portion is divided into a first region in a strip shape in the circumferential direction of the cylindrical portion and having a plurality of holes penetrating in the inner and outer directions, and a second region divided into a strip shape in the circumferential direction of the cylindrical portion and having 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 or being non-porous. The first region is arranged in a portion including the center in the height direction of the cylindrical portion, and the second region is arranged 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." in the stirring device, the above problems can be solved.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

[0006] However, in the stirring device of Patent Document 3 found by the inventors of the present invention, when continuously processing the stirring target, depending on the properties of the stirring target, etc., there has been a problem that the control accuracy of the liquid to be processed that is expanded in a thin film cylindrical shape on the inner surface of the stirring tank and stirred by the high-speed rotation of the rotating blade decreases.

Means for Solving the Problem

[0007] Therefore, as a result of earnestly studying means for solving the above problems, it has been found that the problems can be solved by adopting the following configuration. 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 this container, and is a stirring device that stirs the stirring target that exists in a film shape between the rotating member and the inner wall surface by the centrifugal force of 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. The side surface of the cylindrical portion is composed of a first region that is partitioned in 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 partitioned in 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, the relationship of 0 < Wp < 0.5H is satisfied. A discharge port for discharging the stirring target outside the container is provided at the center of the upper surface of the container, and a cylindrical protruding portion extending from the discharge port toward the rotating member is formed at the periphery of the discharge port. Preferably, the shape of the cross-section orthogonal to the central axis of the cylindrical portion is circular.

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

[0009] Furthermore, in the stirring device, it is preferable that the opening area of ​​each of the multiple holes penetrating inward and outward directions of the first region is larger than the opening area of ​​each of the multiple holes penetrating inward and outward directions of the first region, it is preferable that the number of openings of each of the multiple holes penetrating inward and outward directions of the first region is larger than the number of openings of each of the multiple holes penetrating inward and outward directions of the first region, and it is preferable that the penetration paths of each of the multiple holes penetrating inward and outward directions of the first region branch off within the tubular portion.

[0010] Furthermore, it is preferable 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.

[0011] It is preferable that the multiple holes that penetrate inward and outward from the first region have their penetration paths branched within the tubular portion, and that the inward openings of the individual holes are located in the upper space and the lower space, respectively, and it is preferable that the multiple holes that penetrate inward and outward from 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 alternately arranged in the circumferential direction of the tubular portion. [Effects of the Invention]

[0012] Generally, in a mixer (thin film swirl mixer) equipped with a container and a rotating member rotating at high speed slightly inside the container's inner wall, the centrifugal force of the rotating member stirs the material to be mixed, which is present in a film-like state between the rotating member and the inner wall. The material to be mixed is supplied into the container through a supply port located at the bottom of the container, and is swirled around the container at high speed along the inner and outer circumferential surfaces of the cylindrical portion of the rotating member, which rotates at high speed. The material to be mixed inside the cylindrical portion of the rotating member is then supplied to the clearance between the container and the rotating member through multiple holes formed in the cylindrical portion of the rotating member, which penetrate inward and outward, due to the centrifugal force exerted by the rotation of the rotating member. Furthermore, the material to be mixed supplied to the clearance adheres to the inner surface of the container and swirls in the form of a thin film. As a result, the material to be mixed that is supplied between the container and the rotating member and formed in a thin film state experiences a difference in swirl speed between the surface of the rotating member and the inner surface of the container, resulting in shear forces that cause the material to be mixed.

[0013] Here, as described above, the side surface of the cylindrical portion of the rotating member is composed of a first region that is partitioned in a band shape around the circumferential direction of the cylindrical portion and has a plurality of holes that penetrate inward and outward, and a second region that is partitioned in a band shape around the circumferential direction of the cylindrical portion and has a plurality of holes that penetrate inward and outward such that the aperture ratio of the first region is smaller than that of the first region, and the first region is located in a portion that includes the center in the height direction of the cylindrical portion, and the second region is located 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 overall height of the rotating member is H, 0 <Wp<0.5H When the above relationship is satisfied, the centrifugal force applied by the rotating member causes the material to be stirred, supplied from inside the cylindrical portion of the rotating member to the clearance, to be concentrated through the holes formed in the first region, which is located in a portion including the center of the cylindrical portion in the height direction, among the multiple holes penetrating the side surface of the cylindrical portion of the rotating member in the inward and outward directions. As a result, in the clearance, the pressure of the material to be stirred present in the portion of the cylindrical portion of the rotating member facing the first region is higher than the pressure of the material to be stirred present in the portion of the cylindrical portion of the rotating member facing the second region, creating a flow in which the material to be stirred rotates and moves from the center of the height direction of the cylindrical portion toward the upper and lower ends of the cylindrical portion. This promotes circulation of the material to be stirred between the inside of the cylindrical portion of the rotating member and the clearance, improving processing efficiency for the material to be stirred. Furthermore, in the clearance section, a difference in rotation speed occurs between the outside of the rotating member and the inner surface of the container, resulting in large friction between the object to be stirred and the inner surface of the container and the rotating member, generating high temperatures. However, as described above, if the circulation of the object to be stirred between the inside of the cylindrical part of the rotating member and the clearance section is promoted, the residence time of the object to be stirred in the clearance section is reduced, and the temperature rise of the object to be stirred is suppressed. Here, if the surface of the inner wall of the container is formed with multiple protrusions extending in the central axis direction of the container and protruding from the base of the inner wall toward the center of the container in an array around the circumferential direction of the container, the above-mentioned effect is enhanced by a synergistic effect with the rotating member. Furthermore, if the outer edge shape of the surface of the inner wall of the container in a cross section perpendicular to the central axis of the container is formed to include arc-shaped recesses connecting convex portions and adjacent convex portions, the synergistic effect with the rotating member is particularly enhanced, and the above-mentioned effects are further enhanced.

[0014] In addition, in general, in a thin-film swirl-type mixing device, the aperture ratio of the multiple holes penetrating inward and outward through the cylindrical portion of the rotating member affects the shear force applied to the stirring object and the supply rate of the stirring object from the inside of the cylindrical portion of the rotating member to the clearance. Specifically, as the aperture ratio of the multiple holes penetrating inward and outward through the cylindrical portion decreases, the contact area between the cylindrical portion and the stirring object increases, thereby increasing the shear force applied to the stirring object. On the other hand, as the aperture ratio of the multiple holes penetrating inward and outward through the cylindrical portion decreases, the supply rate of the stirring object from the inside of the cylindrical portion of the rotating member to the clearance decreases, while as the aperture ratio of the holes increases, the supply rate of the stirring object increases. As described above, there is a trade-off between the shear force applied to the stirring object and the supply rate of the stirring object from the inside of the cylindrical portion of the rotating member to the clearance.

[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 the second region, which has a small aperture ratio of the multiple holes, is arranged so as to satisfy the relationship, a large shear force can be applied to the stirring target present in the clearance portion opposite the second region, thereby achieving sufficient stirring. Meanwhile, in the second region, the aperture ratio of the multiple holes is small, resulting in a slower supply rate of the stirring target from the inside of the cylindrical portion of the rotating member to the clearance portion. However, as described above, in the clearance portion, the pressure of the stirring target present in the portion of the cylindrical portion of the rotating member facing the first region is higher than the pressure of the stirring target present in the portion of the cylindrical portion facing the second region. This is compensated for by the generation of a flow of stirring target moving from the center of the height of the cylindrical portion toward the upper and lower ends of the cylindrical portion while swirling. In other words, the stirring target supplied to the clearance portion intensively through the holes formed in the first region, which is located in a portion including the center of the height of the cylindrical portion of the rotating member, is supplied to the clearance portion opposite the second region by a flow of stirring target moving toward the upper and lower ends of the cylindrical portion.

[0016] In addition, in the agitation device of the present invention, the multiple holes penetrating the first region of the cylindrical portion of the rotating member in an inward and outward direction have an opening area inward larger than an opening area outward, which promotes the supply of the agitation material from inside the cylindrical portion of the rotating member to the clearance and further increases the pressure of the agitation material in the portion of the clearance facing the first region of the cylindrical portion of the rotating member, thereby promoting a flow of the agitation material moving from the center of the height of the cylindrical portion toward the upper and lower ends of the cylindrical portion while swirling. As a result, the circulation of the agitation material between the inside of the cylindrical portion of the rotating member and the clearance is further promoted, further enhancing the effects of improving the processing efficiency of the agitation material, suppressing the temperature rise of the agitation material, and applying a large shear force to the agitation material to perform a sufficient agitation process. However, as the circulation of the object to be stirred between the inside of the cylindrical part of the rotating member and the clearance part is further promoted as described above, depending on the properties of the object to be stirred, the problem arises that the control accuracy of the treated liquid being spread into a thin cylindrical film on the inner surface of the stirring tank by the high-speed rotation of the rotating blades is reduced. For this reason, an outlet is provided in the center of the top surface of the container to discharge the material to be stirred outside the container, and a cylindrical protrusion is formed around the periphery of the outlet, extending from the outlet toward the rotating member, thereby preventing the occurrence of the above problems. Here, it is preferable that the cross section of the protrusion perpendicular to the central axis has a circular shape, since this enhances the effect of suppressing the occurrence of the above problems.

[0017] For the multiple holes that penetrate inward and outward through the first region of the cylindrical portion of the rotating member, a method for making the inward opening area of ​​each hole larger than the outward opening area is preferably to make the number of inward openings of each hole larger than the number of outward openings, and more specifically, it is preferable to branch the through-paths of each hole within the cylindrical portion of the rotating member.

[0018] In the agitation device of the present invention, the rotating member preferably 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 preferably divided into an upper space and a lower space by the horizontal portion. When the internal space of the cylindrical portion is divided into an upper space and a lower space by the horizontal portion, the circulation of the agitation target between the inside of the rotating member and the clearance portion is more reliably carried out, and the effects of improving the processing efficiency of the agitation target, suppressing the temperature rise of the agitation target, and applying a large shear force to the agitation target to perform a sufficient agitation process can be more reliably achieved.

[0019] At this time, the plurality of holes penetrating the first region in the inward and outward direction are (1) The through-paths of the individual holes are branched within the cylindrical portion, and the inward openings of the individual holes are disposed in the upper space and the lower space, respectively, or (2) The holes whose inward openings are arranged in the upper space and the holes whose inward openings are arranged in the lower space are arranged alternately in the circumferential direction of the cylindrical portion. With this configuration, the materials to be stirred present in the upper space and the lower space are mixed together when they are supplied intensively to the clearance through the holes formed in the first region. This prevents the circulation of the materials to be stirred between the inside of the cylindrical portion of the rotating member and the clearance from being separated into the upper space and the lower space, and allows the materials to be circulated between the inside of the cylindrical portion of the rotating member and the clearance in a manner that appropriately switches between the materials to be stirred circulating in the upper space and the lower space. This more reliably achieves the effects of improving the processing efficiency of the materials to be stirred, suppressing temperature increases in the materials to be stirred, and applying a large shear force to the materials to be stirred, thereby enabling sufficient stirring.

[0020] Other features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a structural diagram showing a stirring device according to the present invention. [Figure 2] 1 is a cross-sectional view showing a stirring device according to the present invention. [Figure 3] 1 is a diagram showing a rotating member according to a first embodiment of the present invention. [Figure 4] 3 is a schematic diagram showing the flow state of an object to be stirred when the rotating member according to Example 1 of the present invention is used. FIG. [Figure 5] 6A and 6B are diagrams illustrating a rotating member according to a second embodiment of the present invention. [Figure 6] FIG. 6 is a cross-sectional view showing a rotating member according to a second embodiment of the present invention. [Figure 7] 10A and 10B are diagrams illustrating a rotating member according to a third embodiment of the present invention. [Figure 8] FIG. 10 is a cross-sectional view showing a rotating member according to a third embodiment of the present invention. [Figure 9] 10 is a diagram showing a rotating member according to a fourth embodiment of the present invention. FIG. [Figure 10] FIG. 10 is a cross-sectional view showing a rotating member according to a fourth embodiment of the present invention. [Figure 11] FIG. 10 is a diagram showing a rotating member according to a first comparative example. [Figure 12] 10 is a schematic diagram showing the flow state of an object to be stirred when a rotating member according to Comparative Example 1 is used. FIG. [Figure 13] 2 is a schematic diagram showing the surface structure of the inner wall surface of a container used in the agitation device according to the present invention. FIG. [Figure 14] 2 is a schematic diagram showing the surface structure of the inner wall surface of a container used in the agitation device according to the present invention. FIG. [Figure 15] FIG. 2 is a cross-sectional view showing a stirring device according to the present invention (Modification 1). [Figure 16] FIG. 10 is a configuration diagram showing a stirring device according to Comparative Example 2. [Figure 17] FIG. 10 is a cross-sectional view showing a stirring device according to Comparative Example 2. DETAILED DESCRIPTION OF THE INVENTION

[0022] 1 and 2, the agitator 1 includes a cylindrical container 2, an outer layer 4 connected to a water-cooled pipe 6 for supplying and discharging cooling water to the outer peripheral surface including the bottom surface of the container 2, a rotating member 800 (810, 820, 830) that is concentric with the container 2 and can rotate at high speed with a small gap s between it and the inner surface 22 of the container 2, a shaft 10 that supports the rotating member 800 at its end and can rotate forward and reverse at high speed, an upper container 14 that is installed above the container 2 via a dam plate 12 and has a discharge pipe 13 for discharging the product, and a lid 16 that seals the upper container 14. Supply pipes 17 and 18 for supplying raw materials are installed at the bottom of the container 2 via valves 19 and 20. The dam plate 12 constitutes the upper surface of the vessel 2, has a shaft 10 inserted through its center, and is provided with a discharge port 11 (opening) for discharging the liquid to be treated from the vessel 2 to the upper vessel 14. A cylindrical protrusion 12A extending from the outlet 11 toward the rotary member 800 is formed on the periphery of the outlet 11. The protrusion 12A extends in a so-called sleeve shape at a fixed interval so as to be parallel to the shaft 10, thereby forming a gap between the protrusion 12A and the shaft 10 through which the liquid to be treated can flow. In this embodiment, the distance between the protrusion 12A and the shaft 10 is constant, but if necessary, the distance can be changed in the extension direction of the protrusion 12A, for example, in a tapered or stepped manner. Furthermore, although this embodiment shows a mode in which the tip of the protrusion 12A does not reach the upper end of the rotating member 800, as shown in Fig. 15, the tip of the protrusion 12A can also reach below the upper end of the rotating member 800 and be inserted inside a cylindrical portion (described later) of the rotating member 800 (Modification 1). In this case, depending on the properties of the object to be stirred, the problem of reduced control accuracy of the liquid to be treated being spread into a thin cylindrical film on the inner surface of the stirring tank by the high-speed rotation of the rotating blades is more mitigated, which is preferable. Furthermore, in this embodiment, the cross-sectional shape perpendicular to the central axis of the protrusion 12A is circular, i.e., the protrusion 12A is cylindrical, but this is not limited to this, and the cross-sectional shape perpendicular to the central axis of the protrusion 12A can also be polygonal. Furthermore, in this embodiment, the protrusion 12A is shown to be cylindrical and continuous around the entire circumference, but this is not limited to this, and it can also be cylindrical and continuous around almost the entire circumference, even if a portion is cut out. It is preferable that the outer peripheral surface of the protrusion 12A is perpendicular to the dam board 12, since this further alleviates the above problem. 1 and 2, for convenience, the multiple holes, lids, valves, etc. penetrating the cylindrical portion of the rotating member 800 in the inward and outward direction are omitted. 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 relationship of the gap s=(D-φ) / 2 is satisfied.

[0023] As shown in FIG. 2, the upper vessel 14 is provided with a cooling water chamber 15 to which cooling water is supplied on the circumferential surface thereof.

[0024] The rotating member 800 is driven at a high peripheral speed of 10 to 50 m / sec. Furthermore, the stirring device 1 can be made vacuum evacuable by airtightly sealing the container 2, upper container 14, lid 16, and shaft 10 with gaskets and providing a vacuum exhaust device via a valve.

[0025] Next, the operation of the high-speed agitator according to this embodiment will be described. Referring to Fig. 2, first, a barrier plate 12 is installed to seal the container 2 in order to set the conditions for the liquid to be treated. Next, a predetermined amount of the liquid to be treated L is introduced into the container 2 from the supply pipes 17 and 18. Next, the shaft 10 connected to a motor (not shown) is driven to rotate at high speed, causing the rotating member 800 to rotate at high speed.

[0026] At this time, the liquid to be treated L is rotated circumferentially by the high-speed rotation of the rotating member 800. The centrifugal force generated by this rotation causes the liquid to be treated L to swirl in the form of a thin cylindrical film with a thickness of t on the inner surface of the container 2. Furthermore, the liquid to be treated L after stirring flows continuously into the upper container 14 via the outlet 11 of the weir plate 12 and is discharged out of the container 2 through the outlet pipe 13.

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

[0028] Example 1 FIG. 3 shows a rotating member 800 of Example 1. FIG. 3(a) is a cross-sectional view of the rotating member 800, showing a cross section taken along line AA 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. A first region 803 is provided on the side surface of the cylindrical portion 801, as shown by the dashed-dotted line in FIG. 3(c), which is defined in a band shape in the circumferential direction of the cylindrical portion. The first region 803 has a plurality of holes 802 penetrating the cylindrical portion 801 in the inward and outward directions. The first region 803 is also provided so as to include the center of the cylindrical portion 801 in the height direction. The upper end of the first region 803 is defined by an upper tangent to the opening edges of the plurality of holes 802 arranged on the side surface of the cylindrical portion 801 (the upper dashed line in FIG. 3(c)), while the lower end of the first region 803 is defined by a lower tangent to the opening edges of the plurality of holes 802 arranged on the side surface of the cylindrical portion 801 (the lower dashed line in FIG. 3(c)). The width Wp of the first region 803 is defined by the distance between the upper tangent and the lower tangent to the opening edges of the plurality of holes 802. Within the first region 803, the distance between adjacent holes 802 and the distance between rows in which the plurality of holes 802 are arranged are uniform. Furthermore, although this embodiment has shown an example in which the plurality of holes 802 are arranged in a single row within the first region 803, two or more rows are also allowed as necessary. In this case, the upper end of the first region 803 is defined by the upper tangent to the opening edge of the top row of the plurality of holes 802, while the lower end of the first region 803 is defined by the lower tangent to the opening edge of the bottom row of the plurality of holes 802.

[0029] As shown in Fig. 3(c), a second region 804 is arranged on the side surface of the cylindrical portion 801, from the upper end (upper tangent) 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) of the first region 803 to the lower end of the side surface of the cylindrical portion 801. In the second region 804, a plurality of holes 802 are formed so that the aperture ratio of the plurality of holes 802 penetrating inward and outward directions is smaller than the aperture ratio of the first region 803, and in the example shown in Fig. 3, there are no apertures (aperture ratio = 0), but this is not limiting. The aperture ratio P is expressed as P=S1 / S2 S1: The sum of the opening areas of the holes in the target area (first area or second area) S2: Sum of the area of ​​the target area (first area or second area) In this embodiment, the aperture ratios P ​​of the upper and lower second regions 804 are set to be the same, but they may be made different as necessary.

[0030] The width Wn of the second region 804 is determined by the sum (Wn=Wn1+Wn2) of the width Wn1 from the upper end of the first region 803 (the tangent to the upper side of the opening edges 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 to the lower side of the opening edges of the plurality of holes 802) to the lower end of the side surface of the cylindrical portion 801. The overall height H of the rotating member is determined by the height of the side surface of the cylindrical portion 801, H=Wp+Wn Satisfy the relationship.

[0031] Here, the width Wp of the first region is 0 <Wp<0.5H In this embodiment, the widths Wn1 and Wn2 of the upper and lower second regions 804 are set to be the same, but they may be different as necessary.

[0032] With the above-described configuration of the rotating member 800, the centrifugal force applied by the rotating member 800 causes the stirring target material supplied from inside the cylindrical portion 801 of the rotating member 800 to the clearance portion (see paragraph 0012) to be concentratedly supplied from the holes 802 formed in the first region 803, which is located in a portion including the center of the cylindrical portion 801 in the height direction, among the multiple holes 802 in the cylindrical portion 801 of the rotating member 800. As a result, in the clearance portion, the pressure of the stirring target material present in the portion facing the first region 803 of the cylindrical portion 801 is higher than the pressure of the stirring target material present in the portion facing the second region 804, and as shown in FIG. 4, a flow is generated in which the stirring target material rotates and moves from the center of the height direction of the cylindrical portion 801 toward the upper and lower ends of the cylindrical portion 801. This promotes circulation of the stirring target material between the inside of the rotating member 800 shown in FIG. 4 and the clearance portion, improving the processing efficiency of the stirring target material.

[0033] Generally, in the clearance portion, a difference in the rotation speed of the object to be stirred occurs between the rotating member 800 side and the inner surface of the container 2, causing great friction between the object to be stirred and the inner surfaces of the rotating member 800 and the container 2, generating high-temperature heat. For this reason, when the circulation of the object to be stirred that takes place between the inside of the cylindrical portion 801 of the rotating member 800 and the clearance portion as described above is promoted, the residence time of the object to be stirred in the clearance portion is reduced, and a flow occurs in which the object to be stirred, which has a relatively high temperature Fh, and the object to be stirred, which has a relatively low temperature F1, are interchanged, as shown in Fig. 4, thereby suppressing the temperature rise of the object to be stirred.

[0034] The width Wp of the first region is Preferably, 0 <Wp<0.3H More preferably, 0 <Wp<0.2H 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, if the width Wp of the first region is excessively small, the supply of the object to be stirred from the holes 802 formed in the first region 803 to the clearance portion is hindered, so the width Wp of the first region is set to: Preferably, Wp>0.01H More preferably, Wp>0.02H More preferably, Wp>0.03H It is desirable to satisfy the following relationship.

[0035] Furthermore, in general, in a thin film swirl-type agitator, the aperture ratio P of the multiple holes 802 formed in the cylindrical portion 801 affects the shear force applied to the agitation target and the supply rate of the agitation target from the inside of the rotating member to the clearance. Specifically, as the aperture ratio P of the multiple holes 802 formed in the cylindrical portion 801 decreases, the contact area between the cylindrical portion 802 and the agitation target increases, thereby increasing the shear force applied to the agitation target. On the other hand, as the aperture ratio P of the multiple holes 802 formed in the cylindrical portion 801 decreases, the supply rate of the agitation target from the inside of the cylindrical portion 801 of the rotating member 800 to the clearance decreases, whereas as the aperture ratio of the holes increases, the supply rate of the agitation target increases. As described above, there is a trade-off between the shear force applied to the object to be stirred and the speed at which the object to be stirred is supplied from the inside of the cylindrical portion 801 of the rotating member 800 to the clearance portion. For this reason, 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 In this way, by arranging the second region 804 having a small opening ratio of the plurality of holes 802, a large shear force can be applied to the stirring object present in the clearance portion facing the second region 804, thereby enabling sufficient stirring processing.

[0036] On the other hand, in the second region 804, the aperture ratio of the plurality of holes 802 is small, and the speed at which the material to be stirred is supplied from the inside of the cylindrical portion 801 of the rotating member 800 to the clearance is slow, but as described above, in the clearance, the pressure of the material to be stirred present in the portion of the cylindrical portion 801 of the rotating member 800 facing the first region 803 is higher than the pressure of the material to be stirred present in the portion facing the second region 804, and as the material to be stirred rotates, flows are generated that move from the center in the height direction of the cylindrical portion 801 toward the upper and lower ends of the cylindrical portion 801, as shown in Fig. 4. In other words, the material to be stirred that is supplied intensively to the clearance from the holes 802 formed in the first region 803, which is arranged in a portion including the center in the height direction of the cylindrical portion 801 of the rotating member 800, are supplied to the clearance portion facing the second region 804 by flows that move toward the upper and lower ends of the cylindrical portion 801, respectively, and this is compensated for.

[0037] Furthermore, in this embodiment, the multiple holes 802 penetrating the first region 803 of the cylindrical portion 801 of the rotating member 800 inward and outward directions have an opening area inward that is larger than the opening area outward (see FIG. 3(a)). This promotes the supply of the stirring target from the inside of the cylindrical portion 801 of the rotating member 800 to the clearance, thereby further increasing the pressure of the stirring target present in the portion of the clearance facing the first region 803 of the cylindrical portion 801 of the rotating member 800. This promotes the flow of the stirring target, which moves while swirling from the center of the cylindrical portion 801 in the height direction toward the upper and lower ends of the cylindrical portion. As a result, the circulation of the stirring target between the inside of the cylindrical portion 801 of the rotating member 800 and the clearance is further promoted, thereby further enhancing the effects of improving the processing efficiency of the stirring target, suppressing the temperature rise of the stirring target, and applying a large shear force to the stirring target to perform a sufficient stirring process. In order to further enhance the effects of the present invention, the aperture ratio of the plurality of holes 802 in the first region 803 and the second region 804 is set to: Preferably, 0≦P2 / P1<0.25 and P1>0 More preferably, 0≦P2 / P1<0.1 and P1>0 More preferably, 0≦P2 / P1<0.05 and P1>0 It is desirable to set it so that the following relationship is satisfied.

[0038] In this embodiment, the number of openings in the inward direction of each of the plurality of holes 802 penetrating inward and outward directions of the first region 803 of the rotating member 800 is made larger than the number of openings in the outward direction as a method for making the opening area in the inward direction of each of the holes larger than the opening area in the outward direction of each of the holes. Specifically, each of the holes has a through-path 805 that branches inside the cylindrical portion 801, and the number of openings in the inward direction is two, while the number of openings in the outward direction is one.

[0039] In this embodiment, the rotating member 800 has a horizontal portion 806 inside the cylindrical portion 801 that is perpendicular to the rotation axis of the rotating member 800, and the internal space of the cylindrical portion 801 is divided into an upper space 807 and a lower space 808 by the horizontal portion 806. As described above, when the internal space of the cylindrical portion 801 is divided into an upper space and a lower space by the horizontal portion 806, the circulation of the stirring target between the inside of the cylindrical portion 801 of the rotating member 800 and the clearance portion is more reliably performed, and the effects of improving the processing efficiency of the stirring target, suppressing the temperature rise of the stirring target, and applying a large shear force to the stirring target to perform a sufficient stirring process can be more reliably achieved. Note that it is preferable that the division of the upper space 807 and the lower space 808 by the horizontal portion 806 isolates the upper space 807 from the lower space 808, blocking the circulation of the stirring target via the horizontal portion 806. In the illustrated example, the horizontal portion 806 includes a boss 28 that abuts against the shaft 10 .

[0040] In this embodiment, the inward openings of the multiple holes 802 penetrating the first region 803 inward and outward directions are respectively arranged in the upper space 807 and the lower space 808, and an opening through-path 805 connecting these two inward openings and one outward opening is connected inside the cylindrical portion 801. This allows the stirring objects present in the upper space and the lower space to be mixed together when supplied to the clearance portion from the holes formed in the first region. This prevents the stirring object from circulating between the inside of the cylindrical portion 801 of the rotating member 800 and the clearance portion in a manner that is separated between the upper space 807 side and the lower space 808 side, and allows the stirring object to circulate between the inside of the rotating member and the clearance portion in a manner that appropriately switches between the stirring object circulating between the upper space side 807 and the lower space 808. As a result, the above-mentioned effects of improving the processing efficiency of the object to be stirred, suppressing the temperature rise of the object to be stirred, and applying a large shear force to the object to be stirred to perform sufficient stirring processing can be more reliably achieved. Here, as 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 further promoted as described above, depending on the properties of the object to be stirred, a problem may arise in that the control accuracy of the treated liquid being stirred as it is spread into a thin cylindrical film on the inner surface of the stirring tank by the high-speed rotation of the rotating blades is reduced.However, in this embodiment, the occurrence of the above problem is suppressed by providing an outlet 11 at the center of the top surface of the container 2 for discharging the object to be stirred outside the container 2, and further by forming a cylindrical protrusion 12A around the periphery of the outlet 11, extending from the outlet 11 toward the rotating member 800. Furthermore, Figure 13 shows the surface structure of the inner wall surface of the container 2 in Example 1, where Figure 13(a) is an enlarged schematic diagram of the inner wall surface of the container 2 when viewed from the front, and Figure 13(b) is an enlarged schematic diagram of a cross section perpendicular to the central axis of the container 2 (direction T in the figure). As shown in FIG. 13(a), the protrusion 900 is formed to extend in the central axis direction of the container. As shown in FIG. 13(b), the protrusion 900 is formed so as to protrude from a base 901 on the inner wall surface of the container 2 toward the center of the container 2 (direction C in the figure). 13(b), arc-shaped recesses 902 are formed between adjacent protrusions 900. The recesses 902 are formed such that the inner circumferential surfaces thereof recede from the center of the container 2 toward the base 901. As a result, the outer edge shape of the surface of the inner wall of the container 2 is formed to include the arc-shaped recesses 902 that connect the protrusions 900 and adjacent protrusions 900. 13(C), the tip of the convex portion 900 may be flat, or, although not shown, the tip of the convex portion 900 may have a rounded (rounded) shape. However, from the viewpoint of more reliably achieving the effects of the present invention, it is preferable that the tip of the convex portion 900 be sharp. As shown in FIGS. 13(a), (b) and (c), the convex portions 900 and the concave portions 902 are formed so as to be arranged in a plurality in the circumferential direction of the container 2. In this embodiment, an example is shown in which the convex portions 900 are formed extending over almost the entire height of the inner wall surface of the container 2 in the direction of the central axis of the container 2 (direction T in the figure). However, as shown in Figure 14(a), the phase in which the convex portions 900 are arranged may be different at the upper and lower parts of the inner wall surface, or as shown in Figure 14(b), the convex portions 900 may not be formed at either the upper or lower part of the inner wall surface. Furthermore, in this embodiment, an example is shown in which the convex portion 900 is formed by extending parallel to the central axis direction of the container 2 (direction T in the same figure), but this is not limited to this, and the convex portion 900 may be formed by extending so as to be inclined with respect to the central axis direction of the container 2, as shown in Figures 14(c) and (d). The surface structure of the inner wall of the container 2 is not essential for realizing the effects of the present invention, but merely serves to further improve the effects of the present invention. The effect of the protrusion 12A and the synergistic effect of the rotation member 800 and the convex portion 900 also apply to the following embodiments and modified examples.

[0041] Example 2 Figure 5 shows a rotating member 810 of Example 2. Figure 5(a) is a cross-sectional view of the rotating member 810, showing the cross section taken along line AA in Figure 5(b). Figure 5(b) is a top view of the rotating member 810. Figure 5(c) is a side view of the rotating member 810. Figure 6 is a cross-sectional view of the rotating member 810, showing the cross section taken along line BB in Figure 5(b).

[0042] The rotation member 810 is the same as the rotation member 800 of Example 1, except that the structure and arrangement of the multiple holes 802 penetrating inward and outward directions of the first region 803 are different from those of the rotation member 800 of Example 1. Specifically, in the rotation member 810, the inward openings of the multiple holes 802 are arranged in the upper space 807 and the lower space 808, respectively, but the through-paths 805 are not connected inside the cylindrical portion 801, and the inward openings and outward openings are connected one-to-one. Furthermore, the inward openings of the multiple holes 802 are arranged so as to open obliquely on the inclined portion 811 of the cylindrical portion 801, so that the inward opening area of ​​each hole 802 is larger than the outward opening area. 5(c), the plurality of holes 802 penetrating inward and outward directions are arranged such that holes whose inward openings are located in the upper space 807 and holes whose inward openings are located in the lower space 808 are alternately aligned in the circumferential direction of the cylindrical portion 801. With the above configuration, it is possible to achieve the above-mentioned effects of improving the processing efficiency of the stirring object, suppressing the temperature rise of the stirring object, and applying a large shear force to the stirring object to perform a sufficient stirring process.

[0043] Example 3 Figure 7 shows a rotating member 820 of Example 3. Figure 7(a) is a cross-sectional view of the rotating member 820, showing the cross section taken along line AA in Figure 7(b). Figure 7(b) is a top view of the rotating member 820. Figure 7(c) is a side view of the rotating member 820. Figure 8 is a cross-sectional view of the rotating member 820, showing the cross section taken along line BB in Figure 7(b).

[0044] Rotating member 820 is the same as rotating member 810 of Example 2, except that the structure and arrangement of multiple holes 802 penetrating inward and outward directions of first region 803 are different from those of rotating member 810 of Example 2. Specifically, through-paths 805 connecting the inward openings and outward openings of multiple holes 802 penetrate obliquely inside cylindrical portion 801, and as shown in FIG. 7(c), multiple holes 802 penetrating inward and outward directions are arranged such that holes whose inward openings are located in upper space 807 and holes whose inward openings are located in lower space 808 are alternately aligned on the same line in the circumferential direction of cylindrical portion 801. With the above configuration, it is possible to achieve the above-mentioned effects of improving the processing efficiency of the stirring target, suppressing a temperature rise in the stirring target, and applying a large shear force to the stirring target to perform a sufficient stirring process.

[0045] Example 4 FIG. 9 shows a rotating member 830 of Example 4. FIG. 9(a) is a cross-sectional view of the rotating member 830, showing the cross section taken along line AA 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 is an agitation device that includes a container and a rotating member that rotates at high speed slightly inside the inner wall surface of the container, and uses the centrifugal force of the rotating member to agitate an object to be agitated that is present in a film-like form between the rotating member and the inner wall surface. The rotating member has a cylindrical portion that is positioned with a small gap between it and the inner wall surface of the container, and has a horizontal portion inside the cylindrical portion that is perpendicular to the rotation axis of the rotating member. The internal space of the cylindrical portion is divided into an upper space and a lower space by the horizontal portion. The side surface of the cylindrical portion facing the upper space and the side surface facing the lower space are each divided into bands in the circumferential direction of the cylindrical portion, and have a through hole penetrating inward and outward. and a second region that is partitioned in a band shape around the circumference of the cylindrical portion and has a plurality of holes that penetrate inward and outward such that the opening rate of the first region is smaller than that of the first region, or the second region is non-porous; the first region is disposed on the horizontal side of the side of the upper space and the side of the lower space of the cylindrical portion, respectively; the second region is disposed from the upper end of the first region on the side of the upper space to the upper end of the cylindrical portion and from the lower end of the first region on the side of the lower space of the cylindrical portion to the lower end of the cylindrical portion, respectively; and the plurality of holes formed in the first region are arranged in three or fewer rows around the circumference of the cylindrical portion.

[0046] FIG. 10 is a cross-sectional view of the rotating member 830, showing the cross section taken along the line BB in FIG. 9(b). As shown in FIG. 9, the rotating member 830 has a cylindrical portion 801, and a horizontal portion 806 inside the cylindrical portion 801 that is perpendicular to the rotation axis of the rotating member 830. The horizontal portion 806 divides the interior space of the cylindrical portion 801 into an upper space 807 and a lower space 808. A first region 803 is provided 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), and is defined in a band shape in the circumferential direction of the cylindrical portion. The first region 803 has a plurality of holes 802 that penetrate the cylindrical portion 801 in the inward and outward directions. The first region 803 is located on the horizontal portion side of the side surface of the upper space 807 and the side surface of the lower space 808 of the cylindrical portion 801 (toward the center in the height direction of the cylindrical portion 801).

[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 an upper tangent to the opening edges of the plurality of holes 802 arranged on the side surface of the cylindrical portion 801 (the upper dashed line in FIG. 9(c)), while the lower end of the first region 803 is defined by a height position (the lower dashed line in FIG. 9(c)) based on the surface of the horizontal portion 806 facing the upper space 807. 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 distance between the upper tangent to the opening edges of the plurality of holes 802 and the height position based on the surface of the horizontal portion 806 facing the upper space 807. Within the first region 803, the distance between adjacent holes 802 and the distance between rows 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 a tangent to the lower side of the opening edges of the plurality of holes 802 arranged on the side surface of the cylindrical portion 801 (the lower dashed dotted line in FIG. 9(c)), while the upper end of the first region 803 is defined by a height position (the upper dashed dotted line in FIG. 9(c)) based on the surface of the horizontal portion 806 facing the lower space 808. 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 distance between the tangent to the upper side of the opening edges of the plurality of holes 802 and a height position based on the surface of the horizontal portion 806 facing the lower space 807. Within the first region 803, the distance between adjacent holes 802 and the distance between rows 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 they may be made different as necessary. Also, in this embodiment, an example is shown in which the multiple holes 802 are arranged in a single row within the first region 803, but two or more rows may be arranged as necessary. In this case, the upper end of the first region 803 is defined by the upper tangent to the opening edge of the top row of the multiple holes 802, while the lower end of the first region 803 is defined by the lower tangent to the opening edge of the bottom row of the multiple holes 802.

[0049] As shown in Figure 9(c), second regions 804 are arranged 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. In the second region 804, a plurality of holes 802 are formed so that the aperture ratio of the plurality of holes 802 penetrating inward and outward directions is smaller than the aperture ratio of the first hole formation region 803, and in the example shown in Figure 3, there are no apertures (aperture ratio = 0), but this is not limited to this. The aperture ratio P is P=S1 / S2 S1: The sum of the opening areas of the holes in the target area (first area or second area) S2: Sum of the area of ​​the target area (first area or second area) In this embodiment, the opening ratios P ​​of the first region 803 and the second region 804 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 they may be made 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 upper tangent to 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 lower tangent to 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. Note that in this embodiment, the widths Wn1 and Wn2 of the second region 804 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 they may be different as necessary. Also, in this embodiment, an example is shown in which the plurality of holes 802 are arranged in a single row within each first region 803, but two or more rows are also allowed as necessary, as long as they are arranged in three or fewer rows. Preferably, the plurality of holes formed in the first region 803 are arranged in two or less rows in the circumferential direction of the cylindrical portion 801, and more preferably arranged in one row.

[0051] Example 5 When various types of stirring objects were treated using the stirring apparatus 1 of Examples 1 to 4, it was confirmed that the stirring apparatus 1 of the present invention is suitable for stirring objects including 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, and bismuth oxide), clay compounds, platinum-supported carbon, platinum alloy-supported carbon, carbon nanotubes, metal powders (gold, silver, copper, nickel, tin, zinc, aluminum, bismuth, and antimony), mica, cellulose nanofibers, carbon black, graphene, and graphite. In addition to the above-mentioned materials, it has been confirmed that the stirring device 1 of the present invention is also suitable for stirring objects including LiB active materials. For example, LiFe with an olivine structure 1-X M x PO4: [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 positive electrode active material is coated with carbon; Primarily, lithium salts of transition metal oxides are used, and for example, layered rock salt type and spinel type lithium-containing metal oxides can be used as the positive electrode active material. Specific compounds of layered rock salt type positive electrode active materials include lithium cobalt oxide, lithium nickel oxide, and ternary 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 spinel-type positive electrode active materials include lithium manganate, etc. Also, NASICON type oxide solid electrolyte, Lithium Titanium Aluminum Phosphate Li 1+x Al x Ti2-x It has been confirmed that the stirring device 1 of the present invention is also suitable for stirring objects containing the (PO4)3 (LATP) electrolyte. In addition to the above substances, It has been confirmed that the stirring device 1 of the present invention is also suitable for stirring objects containing any of the following: lithium titanate, x-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, diferric trisulfide, lead acetate, lead carbonate, liposomes, magnesium aluminate, magnesium hydroxide, cesium fluoride, cerium fluoride, copper sulfide, silver bromide, potassium bromide, potassium carbonate, trilithium phosphate, and sulfur. It has been confirmed that the stirring device 1 of the present invention is suitable not only for stirring objects containing any one of the above substances alone, but also for stirring objects containing a mixture of two or more of the above substances.

[0052] (Variation 2) The outer diameter of the rotating members 800, 810, 820 and 820 used in the stirring device 1 of Examples 1 to 4 can be changed continuously or stepwise in any height direction, so that the distance (clearance portion) between the inner wall surface of the container 2 and the rotating members 800, 810, 820 and 820 can be changed continuously or stepwise. In addition, the inner diameter of the inner wall surface of the container 2 used in the stirring device 1 of Examples 1 to 4 can be changed continuously or stepwise in any height direction, so that the distance (clearance portion) between the inner wall surface of the container 2 and the rotating members 800, 810, 820 and 820 can be changed continuously or stepwise. Furthermore, the outer diameters of the rotating members 800, 810, 820, and 820 used in the agitation devices 1 of Examples 1 to 4, and the inner diameter of the inner wall surface of the container 2 used in the agitation devices 1 of Examples 1 to 4 can both be changed continuously or stepwise in either height direction. In this case, not only can the distance (clearance portion) between the inner wall surface of the container 2 and the rotating members 800, 810, 820, and 820 be configured to change continuously or stepwise, but the distance of the clearance portion can also be kept constant.

[0053] (Comparative Example 1) FIG. 11 shows a rotating member 8 of Comparative Example 1. FIG. 11(a) is a cross-sectional view of the rotating member 8, showing the cross-section along AA 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 divided into a first region and a second hole-forming region, and a plurality of holes 30 are formed penetrating inward and outward over almost the entire side surface of the cylindrical portion 24, except for a portion including the center in the height direction of the cylindrical portion 24. Furthermore, 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 are connected to each other. It should be noted that Comparative Example 1 is not prior art relative to the present invention.

[0054] With the rotating member 8, the material to be stirred is supplied from the inside of the cylindrical portion 24 of the rotating member 8 to the clearance portion relatively evenly through a plurality of holes 30 that penetrate inward and outward over almost the entire side surface of the cylindrical portion 24. For this reason, in this comparative example, the flow of the material to be stirred, which moves while swirling from the center in the height direction of the cylindrical portion toward the upper and lower ends of the cylindrical portion as in the example, is not promoted, and turbulence occurs in the clearance portion as shown in Figure 12. As a result, in this comparative example, the effects of improving the processing efficiency of the material to be stirred, suppressing the temperature rise of the material to be stirred, and applying a large shear force to the material to be stirred to perform a sufficient stirring process cannot be fully achieved.

[0055] (Comparative Example 2) As shown in Figures 16 and 17, the configuration of the agitator 1X of Comparative Example 2 is the same as the configuration of the agitator 1 of the present invention, except that a cylindrical protrusion 12A extending from the discharge outlet 11 toward the rotating member 800 (810, 820, 830) is not formed around the periphery of the discharge outlet 11. In the agitation device 1X, when the rotating member 800 (810, 820, 830) of the present invention is used, the circulation of the agitated material between the inside of the cylindrical portion of the rotating member and the clearance portion is further promoted, and as a result, depending on the properties of the agitated material, the high-speed rotation of the rotating blades can cause a problem in that the control accuracy of the agitated liquid being spread into a thin cylindrical film on the inner surface of the agitation tank can be reduced.

[0056] The stirring device according to the present invention is not limited to the above-described embodiment, and the specific configuration of each part of the stirring device according to the present invention can be freely designed and modified in various ways. [Explanation of symbols]

[0057] 1 Stirring device 2 containers 4 Outer layer 6 Water cooling piping 8, 800, 810, 820 Rotating members 10 shaft 12 Weir plate 12A protrusion 13 Discharge pipe 14 Upper vessel 16 Lid 17, 18 Supply pipe 19, 20 valves 22 Container inner surface 24, 801 Cylindrical part 26, 806 horizontal part 28 Boss 30 small hole 32 Through hole 81, 807 Upper space 82, 808 Lower space 803 First area 804 Second area 805 Passage 811 Slope

Claims

1. A stirring device comprising a container and a rotating member that rotates at high speed slightly inside the inner wall surface of the container, and stirs a stirring object that exists in a film-like state between the rotating member and the inner wall surface by centrifugal force of the rotating member, The rotating member is a cylindrical portion positioned with a small gap between it and the inner wall surface of the container; 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 inward and outward; a second region that is partitioned in a band shape in the circumferential direction of the cylindrical portion, and has a plurality of holes that penetrate inward and outward directions and have an opening ratio smaller than that of the first region, or is non-hole-containing, 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 an upper end of the first region to an upper end of the cylindrical portion and from a lower end of the first region to a lower end of the cylindrical 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, a discharge port for discharging the object to be stirred outside the container is provided at the center of the top surface of the container, A cylindrical protrusion is formed on the periphery of the outlet, extending from the outlet toward the rotating member. A stirring device characterized by:

2. 2. The stirring device according to claim 1, wherein the cross section of the cylindrical portion perpendicular to the central axis thereof has a circular shape.

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 stirring 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 larger 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 plurality of holes penetrating the first region in an inward and outward direction have respective penetration paths 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 arranged in the upper space and the lower space, respectively.

9. The stirring device described in claim 7, characterized in that the multiple holes that penetrate inward and outward in 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 alternately arranged in the circumferential direction of the cylindrical portion.

Images