Stirring device

Abstract

To provide an agitation device capable of producing slurry in which a linear carbon such as CNT is uniformly mixed and dispersed.SOLUTION: Provided is an agitation device including a container and a rotary member capable of high-speed rotation in the slightly inside of an inner wall surface of the container. The agitation device agitates a target to be agitated that is present in a film shape in between the rotary member and the inner wall surface by a centrifugal force by the rotary member. The rotary member includes a cylindrical part located so as to have a slight gap with respect to the inner wall surface of the container. The cylindrical part has formed therein a portion having a polygonal-shape contour in a section perpendicular to a central axis of the rotary member.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an agitation device for carrying out emulsification and dispersion treatment, and relates to an apparatus used, for example, in the production of 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, and for storing electricity generated by wind and solar power generation facilities. In addition to further improving the characteristics of the battery itself, such as miniaturization, weight reduction, and safety, there is a demand for efficient and low-cost production of batteries with these characteristics.

[0003] As an effective means for solving this problem, a high-speed mixer is disclosed in Patent Document 1. This high-speed mixer has a rotating shaft concentrically disposed within a cylindrical mixing vessel, and a rotating blade with a diameter slightly smaller than that of the mixing vessel is attached to the rotating shaft. The high-speed rotation of the rotating blade stirs the liquid to be treated while spreading it into a thin cylindrical film on the inner surface of the mixing vessel. The rotating blade has a porous cylindrical portion on the outer periphery with a large number of small holes drilled radially through the cylindrical body. This high-speed mixer has a simple structure consisting of a cylinder with many small holes drilled into it, and has the effect of providing excellent mixing performance. In addition, since there is no surface that collides with the liquid being treated, there is little wear even when treating liquid containing solid components, and there is little risk of metal components from the rotating blades being mixed into the liquid being treated.

[0004] In addition, 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 that it is possible to efficiently produce paint for electrodes that is suitable for improving the performance of batteries while maintaining a high level of battery safety. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 11-347388 [Patent Document 2] International Publication No. 2010 / 018771 Summary of the Invention [Problem to be solved by the invention]

[0006] In recent years, attempts have been made to use linear carbon such as carbon nanotubes (CNTs) as additives to batteries, resins, and other materials. In general, linear carbon such as CNTs has excellent properties, such as a larger specific surface area, compared to conventional carbon materials. Therefore, replacing some of the conductive materials in lithium-ion secondary batteries with CNTs is expected to improve their performance. However, linear carbon such as CNT has a strong cohesive force due to its large specific surface area, making it difficult to prepare a uniformly mixed and dispersed slurry. In order to solve this problem, the inventors of the present invention conducted intensive research and discovered that the above problem could be solved by reviewing the shape of the stirring vessel or rotating blade (rotating member) and the arrangement of the multiple small holes that penetrate the radial direction of the porous cylindrical portion (tubular portion) of the rotating blade. [Means for solving the problem]

[0007] Specifically, the stirring device of the present invention is a stirring device that includes a container and a rotating member that rotates at high speed slightly inside the 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 from the rotating member, the rotating member has a cylindrical part that is located with a small gap between it and the inner wall surface of the container, and the cylindrical part is formed with a part that has a polygonal outer shape in a cross section perpendicular to the central axis of the rotating member. The cylindrical portion of the rotating member has a plurality of holes formed therein, which penetrate in an inward and outward direction and communicate the inner space of the rotating member with the outside. This is characterized by the above (Claim 1). Preferably, the inner wall of the container is formed with a portion having a polygonal outer shape in a cross section perpendicular to the central axis of the container (claim 2).

[0008] The stirring device of the present invention is provided with a container and a rotating member that rotates at high speed slightly inside the inner wall surface of the container, and stirs a stirring target that exists in a film-like form between the rotating member and the inner wall surface by centrifugal force from the rotating member, the rotating member having a cylindrical portion that is positioned with a small gap between it and the inner wall surface of the container, and the inner wall of the container has a portion that has a polygonal outer shape in a cross section perpendicular to the central axis of the container. The cylindrical portion of the rotating member is formed with a plurality of holes that penetrate inward and outward directions and communicate the inner space of the rotating member with the outside. (Claim 3).

[0009] In addition, in the stirring device of the present invention, the sides formed by the vertices of the polygon are formed on the outer surface of the cylindrical portion and are parallel to the central axis direction of the rotating member (Claim 4), and the sides formed by the vertices of the polygon are formed on the inner wall of the container and are parallel to the central axis direction of the container (Claim 5). More preferably ,before The cylindrical portion of the rotating member is formed with a plurality of holes penetrating in an inward and outward direction, and the holes and the sides formed by the vertices of the polygon are arranged alternately in the circumferential direction of the cylindrical portion on the outer circumferential surface of the cylindrical portion (see claims 2 and 3). 6 ).

[0010] In the agitation device, 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, and the side surface of the cylindrical portion facing the upper space and the side surface facing the lower space are each divided into a first region that is divided into bands in the circumferential direction of the cylindrical portion and has a plurality of holes penetrating in the inward and outward directions, and a second region that is divided into bands in the circumferential direction of the cylindrical portion and has a plurality of holes penetrating in the inward and outward directions such that the opening ratio of the first region is smaller than that of the first region. The first region is disposed on the horizontal side of the upper space of the cylindrical portion and the horizontal side of the lower space of the cylindrical portion, and the second region is disposed from the upper end of the first region on the side 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 of the lower space of the cylindrical portion to the lower end of the cylindrical portion, and it is preferable that a plurality of holes penetrating inward and outward directions formed in the first region are arranged in three or less rows in the circumferential direction of the cylindrical portion (see claim 1). 7 ).

[0011] In the stirring device, when the opening ratio of the first region is P1 and the opening ratio of the second region is P2, 0≦P2 / P1<0.5 P1>0 It is preferable to satisfy the relationship (claim 8 ). Furthermore, the side surface of the cylindrical portion of the rotating member is composed of a first region that is partitioned in a band shape in the circumferential direction of the cylindrical portion and has a plurality of holes penetrating in the inward and outward directions, and 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 the inward and outward directions formed so that the opening ratio of the holes is smaller than that of the first region, or the second region is non-perforated, and the second region is disposed from the upper end of the cylindrical portion to the upper end of the first region and from the lower end of the cylindrical portion to the lower end of the first region, respectively, and 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 It is preferable to satisfy the relationship (see claims 9 ). In this case, 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 P1>0 It is preferable to satisfy the relationship (claim 10 ).

[0012] Furthermore, it is preferable that the first region is disposed in a portion including the center in the height direction of the cylindrical portion (see claim 11 ), the rotating member has a horizontal portion inside the cylindrical portion that is perpendicular to the rotation axis of the rotating member, and the first region is preferably disposed at a portion where the horizontal portion of the cylindrical portion is connected (claim 12 ). In the stirring device, it is preferable that at least one of the portion having a polygonal outer shape formed on the cylindrical portion and the portion having a polygonal outer shape formed on the inner wall of the container is made of ceramics (see claim 13 ). Effect of the Invention

[0013] Generally, in an agitation device (thin film swirling type 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 that agitates the object to be agitated that exists in a film-like form between the rotating member and the inner wall surface by centrifugal force from the rotating member, the object to be agitated that is supplied into the container from a supply port provided at the bottom of the container swirls at high speed inside the container, accompanied by the inner and outer circumferential surfaces of the cylindrical part of the rotating member that rotates at high speed. At this time, the object to be stirred present inside the cylindrical portion of the rotating member is supplied between the container and the rotating member (clearance portion) through multiple holes that penetrate inward and outward directions formed in the cylindrical portion of the rotating member due to the action of centrifugal force applied by the rotation of the rotating member. Furthermore, the object to be stirred that is supplied to the clearance portion adheres closely to the inner surface of the container and rotates in the form of a thin film. As a result, the object to be stirred, which is supplied between the container and the rotating member and turned into a thin film, experiences a difference in rotation speed between the surface side of the rotating member and the inner surface side of the container, and is stirred by the shear force caused by this.

[0014] Here, as described above, when the rotating member has a cylindrical portion positioned with a small gap between it and the inner wall surface of the container, and the cylindrical portion is formed with a portion whose outer shape in a cross section perpendicular to the central axis direction of the rotating member is polygonal, the spacing of the clearance portion is narrow at the vertices of the polygon and wide at the center of the side connecting the adjacent vertices, so that when the stirring object, which is present in a film-like form between the rotating member and the inner wall surface, is stirred by the centrifugal force of the rotating member, turbulence is generated in the stirring object, thereby further increasing the shear force received by the stirring object, and in particular, the shear force received by the stirring object facing the vertex of the polygon can be further increased. Furthermore, if, together with the cylindrical portion, a portion is formed on the inner wall of the container whose outer shape in a cross section perpendicular to the central axis of the container is polygonal, the turbulence generated when the object to be stirred, which is present in a film-like form in the clearance portion, becomes more pronounced, and the shear force received by the object to be stirred can be further increased, in particular the shear force received by the object to be stirred facing the vertex of the polygon can be further increased. Furthermore, as described above, when the rotating member has a cylindrical portion located with a small gap between it and the inner wall surface of the container, and the inner wall of the container has a portion formed thereon whose outer shape is polygonal in a cross section perpendicular to the central axis of the container, the spacing of the clearance portion is narrow at the vertices of the polygon and wide at the center of the side connecting the adjacent vertices, just as when the rotating member has a portion whose outer shape is polygonal.Therefore, when the stirring object, which is present in a film-like form between the rotating member and the inner wall surface, is stirred by the centrifugal force of the rotating member, turbulence is generated in the stirring object, and the shear force received by the stirring object can be further increased. More preferably, if the cylindrical portion of the rotating member is formed with a plurality of holes penetrating inward and outward directions, the object to be stirred can be efficiently supplied from the inside of the cylindrical portion of the rotating member to a clearance portion which is narrow at the vertices of a polygon and widens at the center portions of the sides connecting adjacent vertices. This makes it possible to supply the object to be stirred to the clearance portion without compromising the effect of turbulence being generated when the object to be stirred, thereby further increasing the shear force experienced by the object to be stirred.

[0015] Furthermore, if the sides formed by the vertices of a polygon are formed parallel to the central axis direction of the rotating member on the outer surface of the cylindrical portion of the rotating member, the distance between the rotating member and the inner wall surface of the container, which is narrow at the vertices of the polygon and wide at the center of the side connecting the adjacent vertices, can be ensured to be wide in the direction of the central axis of the cylindrical portion, thereby ensuring a sufficient area where the turbulence generated when the object to be stirred becomes more pronounced, and further increasing the shear force experienced by the object to be stirred. Furthermore, when the sides formed by the vertices of a polygon are formed on the inner wall of the container parallel to the central axis direction of the container, the distance between the rotating member and the inner wall surface of the container can be secured wide in the direction of the central axis of the cylindrical portion, which is narrow at the vertices of the polygon and wide at the central portion of the side connecting adjacent vertices, just as when the sides are formed on the outer surface of the cylindrical portion of the rotating member parallel to the central axis direction of the rotating member.This ensures a sufficient area in which the turbulence generated when the object to be stirred is more pronounced, and further increases the shear force experienced by the object to be stirred. More preferably, the cylindrical portion of the rotating member is formed with a plurality of holes penetrating inward and outward directions, and on the outer peripheral surface of the cylindrical portion, the holes and the sides formed by the vertices of a polygon are arranged alternately in the circumferential direction of the cylindrical portion, so that the object to be stirred can be efficiently supplied from the inside of the cylindrical portion of the rotating member to the gap between the rotating member and the inner wall surface of the container via the central part of the side of the polygon where the gap between the rotating member and the inner wall surface of the container is widest.This makes it possible to supply the object to be stirred without compromising the effect of turbulence being generated when the object to be stirred, thereby further increasing the shear force experienced by the object to be stirred.

[0016] 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. The side surface of the cylindrical portion facing the upper space and the side surface facing the lower space are each composed of a first region that is divided into a band shape in the circumferential direction of the cylindrical portion and has a plurality of holes penetrating in the inward and outward directions, and a second region that is divided into a band shape in the circumferential direction of the cylindrical portion and has a plurality of holes penetrating in the inward and outward directions 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, and the first region is arranged on the horizontal portion side of the side surface of the upper space and the side surface of the lower space of the cylindrical portion, When 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, and the multiple holes penetrating in an inward and outward direction formed in the first region are arranged in three or fewer rows in the circumferential direction of the cylindrical portion, the object to be stirred that is supplied to the clearance portion from the inside of the cylindrical portion of the rotating member by the centrifugal force applied by the rotating member is supplied in a concentrated manner from the holes formed in the first region that are disposed near the center in the height direction of the cylindrical portion among the multiple holes penetrating in an inward and outward direction of the side surface of the cylindrical portion of the rotating member.

[0017] As a result, 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, and a flow is generated in which the object to be stirred rotates and moves from the center of the height 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 portion, improving the efficiency of processing 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 significant friction between the object to be stirred and the inner surface of the container and the rotating member, generating high temperatures. However, 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 as described above, the residence time of the object to be stirred in the clearance section is reduced and the rise in temperature of the object to be stirred is suppressed.

[0018] Generally, in a thin film swirl type mixing device, the aperture ratio of the multiple holes formed in the cylindrical portion of the rotating member and penetrating in the inward and outward directions affects the shear force applied to the object to be mixed and the supply speed of the object to be mixed from the inside of the cylindrical portion of the rotating member to the clearance portion. Specifically, when the opening rate of the multiple holes formed in the tubular portion and penetrating inward and outward directions becomes smaller, the contact area between the tubular portion and the object to be stirred becomes larger, and the shear force applied to the object to be stirred also becomes larger, whereas when the opening rate of the holes becomes larger, the contact area between the tubular portion and the object to be stirred becomes smaller, and the shear force applied to the object to be stirred also becomes smaller. On the other hand, when the opening rate of the multiple holes formed in the cylindrical portion and penetrating inward and outward directions becomes smaller, the supply speed of the material to be stirred from the inside of the cylindrical portion of the rotating member to the clearance portion becomes smaller, whereas when the opening rate of the holes becomes larger, the supply speed of the material to be stirred 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 of the rotating member to the clearance portion.

[0019] 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, P1>0 By arranging the second hole region having a small opening ratio of the multiple holes so as to satisfy the relationship above, a large shear force can be applied to the stirring object present in the clearance portion facing the second region, thereby enabling sufficient stirring processing to be performed. On the other hand, in the second region, the opening rate of the multiple holes is small, and the supply speed of the object to be stirred from the inside of the cylindrical portion of the rotating member to the clearance portion is small. However, as described above, in the clearance portion, the pressure of the object to be stirred present in the part 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 part facing the second region, so this is compensated for by the generation of a flow in which the object to be stirred moves 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 object to be stirred is supplied to the clearance portion in a concentrated manner from a hole formed in the first region located near the center of the height of the cylindrical portion of the rotating member, and is covered by the flow of the object to be stirred moving toward the upper and lower ends of the cylindrical portion, thereby being supplied to the clearance portion opposite the second region.

[0020] Furthermore, in the stirring device of the present invention, the side surface of the cylindrical portion of the rotating member is composed of a first region that is partitioned in a band shape in the circumferential direction of the cylindrical portion and has a plurality of holes penetrating in the inward and outward directions, and 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 the inward and outward directions 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, and the second region is disposed from the upper end of the cylindrical portion to the upper end of the first region and from the lower end of the cylindrical portion to the lower end of the first region, respectively, and 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 Since the following relationship is satisfied, As with the above-mentioned rotating member, the circulation of the object to be stirred between the inside of the cylindrical portion and the clearance portion is promoted, and the processing efficiency of the object to be stirred is further improved. 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 significant friction between the object to be stirred and the inner surface of the container and the rotating member, generating high temperatures. However, 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 as described above, the residence time of the object to be stirred in the clearance section is reduced, and the rise in temperature of the object to be stirred is further suppressed. 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, P1>0 By arranging the second region having a small opening ratio of the multiple holes so as to satisfy the relationship above, a large shear force can be applied to the stirring object present in the clearance portion facing the second region, thereby enabling sufficient stirring processing to be performed. On the other hand, in the second formation region, the opening rate of the multiple holes is small, and the supply speed of the object to be stirred from the inside of the cylindrical portion of the rotating member to the clearance portion is small; however, 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, and this is compensated for by the generation of a flow in which the object to be stirred moves from the center of the height of the cylindrical portion toward the upper and lower ends of the cylindrical portion while rotating. In other words, the object to be stirred is supplied to the clearance portion in a concentrated manner from holes formed in a first region located near the center of the height of the cylindrical portion of the rotating member, and is covered by a flow of the object to be stirred moving toward the upper and lower ends of the cylindrical portion, thereby being supplied to the clearance portion opposite the second hole region.

[0021] Furthermore, when the first region is positioned in a portion including the center of the height of the cylindrical portion, the centrifugal force applied by the rotating member causes the stirring target material supplied to the clearance portion from inside the cylindrical portion of the rotating member to be concentratedly supplied from holes formed in the first region positioned in a portion including the center of the height of the cylindrical portion among the multiple holes penetrating inward and outward directions through 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 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, and a flow is generated in which the object to be stirred rotates and moves from the center of the height 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 portion, improving the efficiency of processing 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 significant friction between the object to be stirred and the inner surface of the container and the rotating member, generating high temperatures. However, 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 as described above, the residence time of the object to be stirred in the clearance section is reduced and the rise in temperature of the object to be stirred is suppressed. Furthermore, when the first region is located in the portion where the horizontal portion of the cylindrical portion is connected, the internal space of the cylindrical portion is divided into an upper space and a lower space by the horizontal portion, and the circulation of the object to be stirred between the inside of the rotating member and the clearance portion can be more reliably achieved, thereby more reliably achieving the above-mentioned effects of improving the processing efficiency of the object to be stirred, the effect of suppressing the temperature rise of the object to be stirred, and the effect of applying a large shear force to the object to be stirred to perform sufficient stirring processing.

[0022] Furthermore, when at least one of the portion having a polygonal outer shape formed on the cylindrical portion or the portion having a polygonal outer shape formed on the inner wall of the container is formed from ceramics, the wear resistance of the portion having a polygonal outer shape formed on the cylindrical portion or the portion having a polygonal outer shape formed on the inner wall of the container is improved. Furthermore, when this part is made of ceramics, there is a problem of temperature rise in the object to be stirred due to reduced heat dissipation compared to when it is made of metal; however, the circulation of the object to be stirred between the inside of the rotating member and the clearance portion suppresses the temperature rise in the object to be stirred, thereby offsetting the problem of reduced heat dissipation caused by forming it from ceramics.

[0023] 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 description of the drawings]

[0024] [Figure 1] 1 is a configuration diagram showing a stirring device according to the present invention. [Diagram 2] 1 is a cross-sectional view showing a stirring device according to the present invention. [Diagram 3] FIG. 2 is a diagram showing a rotating member according to the first embodiment of the present invention. [Figure 4] FIG. 1 is a cross-sectional view showing a stirring vessel according to a first embodiment of the present invention. [Diagram 5]FIG. 2 is a diagram showing a state in which the rotating member and the stirring vessel according to the first embodiment of the present invention are combined. [Figure 6] FIG. 2 is a schematic diagram showing a flow state of an object to be stirred when the rotating member and the stirring vessel according to the first embodiment of the present invention are used. [Figure 7] 6A and 6B are diagrams illustrating a rotating member according to a second embodiment of the present invention. [Figure 8] 11A and 11B are diagrams illustrating a rotating member according to a third embodiment of the present invention. [Figure 9] 11 is a diagram showing a rotating member according to a fourth embodiment of the present invention. FIG. [Figure 10] 13A and 13B are diagrams illustrating a rotating member according to a fifth embodiment of the present invention. [Figure 11] 13 is a diagram showing a rotating member according to a sixth embodiment of the present invention. FIG. [Figure 12] FIG. 13 is a diagram showing a rotating member according to a comparative example. [Figure 13] 10 is a schematic diagram showing a flow state of an object to be stirred when a rotating member and a stirring vessel according to a comparative example are used. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. As shown in Figures 1 and 2, the mixing device 1 includes a cylindrical container 2, an outer layer to which a water-cooled pipe 6 is connected for supplying and discharging cooling water to the outer peripheral surface including the bottom surface of the container 2, a rotating member 800 which is concentric with the container 2 and can rotate at high speed with a small gap between it and the inner surface 22 of the container 2, a shaft 10 which supports the rotating member 800 at its end and can rotate forward and reverse at high speed, an upper container 14 which is provided at the top of the container 2 via a dam plate 12 and has a discharge pipe 13 for discharging the product, and a lid which seals 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. 1 and 2, for the sake of convenience, a plurality of holes penetrating the cylindrical portion of the rotating member 800 in the inside-outside direction, covers, valves, and the like are omitted.

[0026] 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. When the conditions for the liquid to be treated are set (during batch operation), as shown in Fig. 2, a small-diameter hole with only a small gap for the agitator shaft is used as the barrier plate 12, and after the conditions are set, as shown in Fig. 1, when continuous treatment is performed, a barrier plate 12 having a predetermined opening 11 can be installed so that the liquid to be treated can be discharged from the outflow pipe 13. As shown in Fig. 2, the upper vessel 14 is provided with a cooling water chamber 15 to which cooling water is supplied on its peripheral surface. When the conditions for the liquid to be treated are set (during batch operation), as shown in Fig. 2, a small-diameter hole with only a small gap for the agitator shaft is used as the barrier plate 12, and after the conditions are set, as shown in Fig. 1, when continuous treatment is performed, a barrier plate 12 having a predetermined opening 11 can be installed so that the liquid to be treated can be discharged from the outflow pipe 13. As shown in Fig. 2, the upper vessel 14 is provided with a cooling water chamber 15 to which cooling water is supplied on its peripheral surface. When the conditions for the liquid to be treated are set (during batch operation), as shown in Fig. 2, a small-diameter hole with only a small gap for the agitator shaft is used as the barrier plate 12, and after the conditions are set, as shown in Fig. 1, when continuous treatment is performed, a barrier plate 12 having a predetermined opening 11 can be installed so that the liquid to be treated can be discharged from the outflow pipe 13. As shown in Fig. 2, the upper vessel 14 is provided with a cooling water chamber 15 to which cooling water is supplied on its peripheral surface. The dam plate 12 has an opening 11 so that the liquid to be treated (the liquid to be stirred) can be discharged from the outlet pipe 13 .

[0027] Moreover, the rotating member 800 is adapted to be 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, the upper container 14, the lid 16 and the shaft 10 with gaskets and providing a vacuum exhaust device via a valve.

[0028] Next, the operation of the high-speed stirring device according to this embodiment will be described. Referring to FIG. 2, first, a barrier plate 12 for sealing the container 2 is installed in order to set the conditions of the liquid to be treated. Next, a predetermined amount of the liquid to be treated L is introduced into the container 2 through the supply pipes 17, 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.

[0029] At this time, the liquid to be treated L is rotated in the circumferential direction 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 on the inner surface of the container 2 in the form of a thin cylindrical film having a thickness t. Furthermore, the liquid to be treated L after stirring flows continuously over the barrier plate 12 into the upper vessel 14 and is discharged from the vessel 2 through the outflow pipe 13. As shown in Figures 6(a), (b) and (c), the rotating blade 8 is formed into a wheel shape by integrating the porous cylindrical portion 24 on the outer periphery with a boss 28 by an arm 26, and the porous cylindrical portion 24 has numerous small holes 30 drilled in the cylindrical portion other than the portion to which the arm 26 is connected, and the arm 26 is provided with an appropriate number of communication holes 32.

[0030] There is no particular limitation on the liquid to be treated L that can be applied to this device, but when applied to a liquid to be treated L that contains conductive carbon, it is preferable because the dispersion treatment can be performed without impairing the physical properties of the conductive carbon. As the conductive carbon, it is preferable to use carbon black or carbon nanotubes (CNT), and it is particularly preferable to use CNT. In general, linear carbon such as CNTs has excellent properties, such as a larger specific surface area, compared to conventional carbon materials. Therefore, replacing some of the conductive materials in lithium-ion secondary batteries with CNTs is expected to improve their performance. However, linear carbon such as CNTs has a strong cohesive force due to its large specific surface area, making it difficult to produce a uniformly mixed and dispersed slurry. However, using this device for dispersion processing is preferable as it solves this problem.

[0031] Example 1 Next, the rotating members used in the agitator of the present invention and the agitator of the comparative example will be described in detail. Fig. 3 shows a rotating member 800 of the first embodiment. 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 Figure 3, the rotating member 800 has a cylindrical portion 801, and inside the cylindrical portion 801, a horizontal portion 806 that is perpendicular to the rotation axis of the rotating member 801, and the internal space of the cylindrical portion 801 is divided by the horizontal portion 806 into an upper space 807 and a lower space 808. A first region 803 is provided on the side of the cylindrical portion 801 of the rotating member 800, as shown by the dotted line in Figure 3 (c), which is partitioned into a band in the circumferential direction of the cylindrical portion and has a plurality of holes 802 formed therein that penetrate inward and outward directions of the cylindrical portion 801. The first region 803 is disposed on the horizontal side of the side surface of the upper space 807 and the horizontal side of the lower space 808 of the cylindrical portion 801 (the center side in the height direction of the cylindrical portion 801). As shown in FIG. 3(b), the cylindrical portion 801 is formed with a portion whose outer shape in a cross section perpendicular to the central axis of the rotating member 800 is polygonal.

[0032] As shown in FIG. 3( c ), on the side surface of the cylindrical portion 801 , a side 810 formed by vertices 809 of a polygon is formed parallel to the central axis direction of the rotating member 800 . In this embodiment, an example is shown in which a part that is a regular icosagon is shown, but the number of corners of the polygon can be changed as necessary. However, if the number of corners of the polygon is excessively large, the outer shape of the rotating member 800 will become closer to a circle, and the effect of the present invention will be reduced, so it is preferable that the number of corners of the polygon be 30 or less, more preferably 20 or less, and even more preferably 10 or less.

[0033] The upper end of the first region 803 on the side of the upper space 807 of the tubular portion 801 is defined by the upper tangent to the opening edge of the multiple holes 802 arranged on the side of the tubular portion 801 (the upper tangent to the opening edge of the top row of the multiple holes 802, the upper dotted line in Figure 3(c)), while the lower end of the first region 803 is defined by a height position based on the center line of the horizontal portion 806 (the dotted line in the center of the height direction in Figure 3(c)). 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 of the opening edge of the plurality of holes 802 and the height position based on the center line of the horizontal portion 806. In the first region 803, the intervals between adjacent holes 802 and the intervals between rows in which the holes 802 are arranged are uniform.

[0034] The lower end of the first region 803 on the side of the lower space 808 of the tubular portion 801 is defined by the lower tangent to the opening edge of the multiple holes 802 arranged on the side of the tubular portion 801 (the lower tangent to the opening edge of the bottom row of the multiple holes 802, the lower dotted line in Figure 3(c)), while the upper end of the first region 803 is defined by a height position based on the center line of the horizontal portion 806 (the upper dotted line in Figure 3(c)). The width Wp1 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 lower tangent of the opening edge of the plurality of holes 802 and the height position based on the center line of the horizontal portion 806. In the first region 803, the intervals between adjacent holes 802 and the intervals between rows in which the holes 802 are arranged are uniform. In this embodiment, the width Wp1 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 is set to be the same, but it is also permissible to make them different as necessary. In addition, in this embodiment, an example is shown in which multiple holes 802 are arranged in a single row within the first region 803, but they may be arranged in three rows or less, preferably two rows or less, and more preferably in a single row.

[0035] As shown in FIG. 3(c), second regions 804 are respectively arranged on the side surface of the tubular 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 tubular 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 tubular 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. In the example shown in FIG. 3, there are no holes (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 first region or the second region S2: Sum of the area of ​​the first or second region It is defined by: In addition, in this embodiment, the opening ratios P ​​of the first region 803 and the second region 804 are set to be the same on the side surfaces of the upper space 807 and the lower space 808 of the cylindrical portion 801, respectively, but it is also acceptable for them to be different as necessary. In the case where a plurality of holes 802 are formed in the second region 804, the intervals between adjacent holes 802 and the intervals between rows in which the plurality of holes 802 are arranged are uniform.

[0036] The width Wp2 of the second region 804 is determined by the width from the upper end of the first region 803 (the upper tangent to the opening edge of the top row of the multiple holes 802) on the side of the upper space 807 to the upper end of the side of the tubular portion 801, or the width from the lower end of the first region 803 (the lower tangent to the opening edge of the bottom row of the multiple holes 802) on the side of the lower space 808 to the lower end of the side of the tubular portion 801. In this embodiment, the width Wp2 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 is set to be the same, but it is also permissible to make them different as necessary.

[0037] As shown in FIG. 4, the inner wall surface of the container 2 has a portion whose outer shape in a cross section perpendicular to the central axis of the container 2 is polygonal. The portion having a polygonal outer shape is formed in a portion of the inner wall surface of the container 2 that faces the portion having a polygonal outer shape of the rotating member 800 (not shown). Furthermore, on the inner wall surface of the container 2, as shown in FIG. 1, sides 813 formed by vertices 812 of a polygon are formed parallel to the central axis direction of the container 2. In this embodiment, an example is shown in which a part that is a regular icosagon is shown, but the number of corners of the polygon can be changed as necessary. However, if the number of corners of the polygon is excessively large, the outer shape of the container 2 will become closer to a circle, and the effects of the present invention will be reduced, so it is preferable that the number of corners of the polygon be 30 or less, more preferably 20 or less, and even more preferably 10 or less. In this embodiment, an example has been shown in which a portion having a polygonal outer cross-section is formed on both the side surface of the cylindrical portion 801 and the inner wall surface of the container 2, but it is sufficient that a portion having a polygonal outer cross-section is formed on at least one of the side surface of the cylindrical portion 801 or the inner wall surface of the container 2, and it is preferable that a portion having a polygonal outer cross-section is formed on both the side surface of the cylindrical portion 801 and the inner wall surface of the container 2, as this particularly enhances the effects of the present invention.

[0038] With the above-described configuration of rotating member 800 and container 2, as shown in FIG. 5, when the center of a line connecting vertices 809 of the polygon in the outer shape of rotating member 800 faces the center of a line connecting vertices 812 of adjacent polygons on the inner wall surface of container 2, a narrow portion 814 is formed where the clearance distance is smallest, whereas when the center of a line connecting vertices 809 of adjacent polygons in the outer shape of rotating member 800 faces the vertex 812 of the polygon on the inner wall surface of container 2, a wide portion 815 is formed where the clearance distance is largest. As described above, when the rotating member 800 has a cylindrical portion 801 positioned with a small gap between it and the inner wall surface of the container 2, and the cylindrical portion is formed with a portion whose outer shape in a cross section perpendicular to the central axis direction of the rotating member 800 is polygonal, the spacing of the clearance portion is narrow at the portions which become the vertices 809 of the polygon and wide at the central portions of the sides connecting the vertices 809 of adjacent polygons. Therefore, when the stirring target, which is present in a film-like form between the rotating member 800 and the inner wall surface, is stirred by the centrifugal force of the rotating member 800, turbulence is generated, and the shear force received by the stirring target can be further increased, and in particular, the shear force received by the stirring target can be further increased at the portions which become the vertices of the polygon.

[0039] In addition, due to the centrifugal force applied by the rotating member 800, the stirring target material supplied to the clearance portion from inside the cylindrical portion 801 of the rotating member 800 is supplied in a concentrated manner from the holes 802 formed in a first region 803 located near 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 object to be stirred present in the portion facing the first region 803 of the tubular portion 801 becomes higher than the pressure of the object to be stirred present in the portion facing the second region 804, and as the object to be stirred rotates, a flow is generated in which the object moves from the center of the height of the tubular portion 801 toward the upper and lower ends of the tubular portion 801, as shown in Figure 6. This promotes circulation of the object to be stirred between the inside of the rotating member 801 shown in FIG. 6 and the clearance portion, improving the processing efficiency of the object to be stirred.

[0040] 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, resulting in large friction between the object to be stirred and the rotating member 800 and the inner surface of the container 2, generating high temperatures. 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 is reduced, and a flow is generated in which the relatively high temperature object to be stirred Fh is replaced by the relatively low temperature object to be stirred Fl, as shown in Figure 6, thereby suppressing the temperature rise of the object to be stirred.

[0041] In general, in a thin film swirling type stirrer, the aperture ratio P of the multiple holes 802 formed in the cylindrical portion 801 affects the shear force applied to the object to be stirred and the supply speed 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 multiple holes 802 formed in the tubular portion 801 becomes smaller, the contact area between the tubular portion 802 and the object to be stirred becomes larger, and the shear force applied to the object to be stirred also becomes larger, whereas when the aperture ratio P of the holes becomes larger, the contact area between the tubular portion 801 and the object to be stirred becomes smaller, and the shear force applied to the object to be stirred also becomes smaller. On the other hand, when the aperture ratio P of the multiple holes 802 formed in the cylindrical portion 801 becomes smaller, the supply speed of the stirring object from the inside of the cylindrical portion 801 of the rotating member 800 to the clearance portion becomes smaller, whereas when the aperture ratio of the holes becomes larger, the supply speed of the stirring object becomes larger.

[0042] 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, P1>0 The relationship is set to satisfy: In this manner, by arranging the second region 804 having a small opening ratio of the multiple 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 to be performed.

[0043] On the other hand, in the second region 804, the opening rate of the multiple holes 802 is small, and the supply speed of the stirring object from the inside of the tubular portion 801 of the rotating member 800 to the clearance portion is small. However, as described above, in the clearance portion, the pressure of the stirring object present in the portion facing the first region 803 of the tubular portion 801 of the rotating member 800 is higher than the pressure of the stirring object present in the portion facing the second region 804. As a result, the stirring object rotates and a flow is generated that moves from the center of the height of the tubular portion 801 toward the upper and lower ends of the tubular portion 801, as shown in Figure 6. This compensates for this point. That is, the object to be stirred is supplied in a concentrated manner to the clearance portion from holes 802 formed in a first region 803 arranged in a portion including the center of the height direction of the cylindrical portion 801 of the rotating member 800, and is covered by being supplied to the clearance portion opposite the second region 804 by flows moving respectively toward the upper and lower ends of the cylindrical portion 801.

[0044] As a result, 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, thereby further enhancing 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 being able to apply a large shear force to the object to be stirred 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, P1>0 More preferably, 0≦P2 / P1<0.1, P1>0 More preferably, 0≦P2 / P1<0.05, P1>0 It is desirable to set it so that the following relationship is satisfied.

[0045] Furthermore, in this embodiment, the internal space of the cylindrical portion 801 of the rotating member 800 is divided into an upper space 807 and a lower space 808 by the horizontal portion 806. However, if the horizontal portion 806 is made non-perforated to isolate the upper space 807 and the lower space 808, the flow of the object to be stirred between the upper space 807 and the lower space 808 via the horizontal portion 806 is blocked. This ensures more reliable circulation of the object to be stirred between the inside of the cylindrical portion 801 of the rotating member 800 and the clearance portion, thereby more reliably achieving the effects of improving the processing efficiency of the object to be stirred, suppressing the temperature rise of the object to be stirred, and enabling a large shear force to be applied to the object to be stirred to perform a sufficient stirring process.

[0046] In this embodiment, the first region 803 is disposed in a portion including the center of the cylindrical portion 801 in the height direction. In this way, when the first region 803 is positioned in the portion where the horizontal portion 806 of the tubular portion 801 is connected, the internal space of the tubular portion 801 is divided into an upper space 807 and a lower space 808 by the horizontal portion 806, and the circulation of the object to be stirred between the inside of the rotating member 800 and the clearance portion can be more reliably achieved, thereby more reliably achieving the 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, thereby enabling sufficient stirring processing to be performed.

[0047] Furthermore, when the rotating member 800 has a horizontal portion inside the cylindrical portion 801 that is perpendicular to the rotation axis of the rotating member, the first region 803 can also be positioned in the portion where the horizontal portion 806 of the cylindrical portion 801 is connected. In this way, 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, and the circulation of the object to be stirred between the inside of the rotating member 800 and the clearance portion can be more reliably achieved, thereby more reliably achieving the 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, thereby enabling sufficient stirring processing to be performed.

[0048] At least one of the portion of the cylindrical portion 801 having a polygonal outer shape and the portion of the inner wall of the container 2 having a polygonal outer shape can be made of ceramics. In this way, when at least one of the portion formed on the cylindrical portion 801 and the portion formed on the inner wall of the container 2 and having a polygonal outer shape is formed from ceramics, the wear resistance of the portion formed on the cylindrical portion 801 and the portion formed on the inner wall of the container 2 and having a polygonal outer shape is improved. Furthermore, when this part is made of ceramics, there is a problem of temperature rise in the object to be stirred due to reduced heat dissipation compared to when it is made of metal; however, the circulation of the object to be stirred between the inside of the rotating member 800 and the clearance portion suppresses the temperature rise in the object to be stirred, thereby offsetting the problem of reduced heat dissipation caused by forming it from ceramics. Regarding the formation of ceramics, it is not necessary to form the entire rotating member 800 or the container 2 from ceramics, and a ceramic layer may be formed on the surface portion of the rotating member 800 or the container 2 . The ceramic layer can be formed by a method such as thermal spraying of ceramics or lamination of ceramic materials. Usable ceramics include zirconium oxide (ZrO2), aluminum oxide (Al2O3), titanium carbide (TiC), silicon nitride (Si3N4), and the like.

[0049] In this embodiment, the diameter of the rotating member 800 is 77 mm, and the diameter of the inner wall surface of the container 2 is 80 mm. The width of the narrow portion 814 is set to 1 mm, and the width of the wide portion 815 is set to 2 mm, but the dimensions of the rotating member 800 and the container 2, and the widths of the narrow portion 814 and the wide portion 815 can be increased or decreased as necessary. The width of the narrow portion 814 is preferably set to 0.1 to 3 mm, and more preferably 0.5 to 2 mm. On the other hand, the width of the wide portion 815 is preferably set to 0.5 to 5 mm, and more preferably 1 to 4 mm.

[0050] Example 2 The stirring device of the second embodiment has the same configuration as the stirring device of the first embodiment, except for the rotating member 800. Fig. 7 shows a rotating member 800 of the second embodiment. Fig. 7(a) is a cross-sectional view of the rotating member 800, showing a cross section taken along line AA in Fig. 7(b). Fig. 7(b) is a top view of the rotating member 800. Fig. 7(c) is a side view of the rotating member 800. The side surface of the cylindrical portion 801 of the rotating member 800 is composed of a first region 803 which is partitioned in a band shape in the circumferential direction of the cylindrical portion 801 and in which a plurality of holes 802 penetrating in the inward and outward directions are formed, and a second region 804 which is partitioned in a band shape in the circumferential direction of the cylindrical portion 801 and in which the plurality of holes 802 penetrating in the inward and outward directions are formed so that the aperture ratio of the first region 803 is smaller than that of the first region 803, or which is non-perforated. The second region 804 is disposed from the upper end of the cylindrical portion 801 to the upper end of the first region 803, and from the lower end of the cylindrical portion 801 to the lower end of the first region 803, respectively. When the width from the upper end to the lower end of the first region 803 is Wp and the total height of the cylindrical portion is H, 0 <Wp<0.5H It fulfills the relationship. Specifically, as shown in FIG. 7, the rotating member 800 has a cylindrical portion 801, and a first region 803 is provided on the side of the cylindrical portion 801, which is partitioned into a band in the circumferential direction of the cylindrical portion, as shown by the dotted line in FIG. 7(c), and has a plurality of holes 802 formed therein that penetrate inward and outward through the cylindrical portion 801. Moreover, the first region 803 is provided so as to include the center of the cylindrical portion 801 in the height direction. The second region 804 is provided adjacent to the upper and lower ends of the first region 803, respectively.

[0051] As shown in FIG. 7(b), the cylindrical portion 801 is formed with a portion whose outer shape in a cross section perpendicular to the central axis of the rotating member 800 is polygonal. As shown in FIG. 7( c ), on the side surface of the cylindrical portion 801 , a side 810 constituted by vertices 809 of a polygon is formed parallel to the central axis direction of the rotating member 800 . In this embodiment, an example has been shown in which a portion is formed whose external shape in a cross section perpendicular to the central axis of the rotating member 800 is a regular icosagon, but the number of corners of the polygon can be changed as necessary. However, if the number of corners of the polygon is excessively large, the outer shape of the rotating member 800 will become closer to a circle, and the effect of the present invention will be reduced, so it is preferable that the number of corners of the polygon be 30 or less, more preferably 20 or less, and even more preferably 10 or less.

[0052] The upper end of the first region 803 is defined by an upper tangent to the opening edge of the multiple holes 802 arranged on the side of the tubular portion 801 (the upper tangent to the opening edge of the top row of the multiple holes 802, the upper dotted dashed line in Figure 7(c)), while the lower end of the first region 803 is defined by a lower tangent to the opening edge of the multiple holes 802 arranged on the side of the tubular portion 801 (the lower tangent to the opening edge of the bottom row of the multiple holes 802, the lower dotted dashed line in Figure 7(c)). The width Wp of the first region 803 is defined by the distance between the upper and lower tangents to the opening edges of the multiple holes 802 . In the first region 803, the intervals between adjacent holes 802 and the intervals between rows in which the holes 802 are arranged are uniform. In addition, in this embodiment, an example has been shown in which the plurality of holes 802 are arranged in two rows in the first region 803, but one row or three or more rows may also be allowed as necessary.

[0053] As shown in FIG. 7(c), a second region 804 is arranged on the side of the tubular portion 801 from the upper end (upper tangent) of the first region 803 to the upper end of the side of the tubular portion 801, and from the lower end (lower tangent) of the first region 803 to the lower end of the side of the tubular 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. In the example shown in FIG. 7, there are no holes (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 first region or the second region S2: Sum of the area of ​​the first or second region It is defined by: 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 different as necessary.

[0054] The width Wn of the second region 804 is determined by the sum of the width Wn1 from the upper end of the first region 803 (the upper tangent to the opening edge of the multiple holes 802) to the upper end of the side of the tubular portion 801, and the width Wn2 from the lower end of the first region 803 (the lower tangent to the opening edge of the multiple holes 802) to the lower end of the side of the tubular portion 801 (Wn = Wn1 + Wn2). The total 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.

[0055] Here, the width Wp of the first region is 0 <Wp<0.5H Satisfy the relationship. In this embodiment, the widths Wp2 of the upper and lower second regions 804 are set to be the same, but may be different as necessary.

[0056] With the above-described configuration of the rotating member 800 and container 2, as shown in Figure 5 of Example 1, when the vertex 809 of the polygon in the outer shape of the rotating member 800 faces the center of the line connecting the vertices 812 of adjacent polygons on the inner wall surface of the container 2, a narrow portion 814 is formed where the clearance distance is smallest, while when the center of the line connecting the vertices 809 of adjacent polygons in the outer shape of the rotating member 800 faces the vertex 812 of the polygon on the inner wall surface of the container 2, a wide portion 815 is formed where the clearance distance is largest. As described above, when the rotating member 800 has a cylindrical portion 801 positioned with a small gap between it and the inner wall surface of the container 2, and the cylindrical portion is formed with a portion whose outer shape in a cross section perpendicular to the central axis direction of the rotating member 800 is polygonal, the spacing of the clearance portion is narrow at the portions which become the vertices 809 of the polygon and wide at the central portions of the sides connecting the vertices 809 of adjacent polygons. Therefore, when the stirring target, which is present in a film-like form between the rotating member 800 and the inner wall surface, is stirred by the centrifugal force of the rotating member 800, turbulence is generated, and the shear force received by the stirring target can be further increased. In particular, the shear force that the object to be stirred receives can be increased at the vertices of the polygon.

[0057] In addition, due to the centrifugal force applied by the rotating member 800, the object to be stirred is supplied to the clearance portion from the inside of the cylindrical portion 801 of the rotating member 800, and is supplied in a concentrated manner from the holes 802 formed in a 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 object to be stirred present in the portion facing the first region 803 of the tubular portion 801 becomes higher than the pressure of the object to be stirred present in the portion facing the second region 804, and as the object to be stirred rotates, a flow is generated that moves from the center in the height direction of the tubular portion 801 toward the upper and lower ends of the tubular portion 801, as shown in Figure 6 of Example 1. This promotes circulation of the object to be stirred between the inside of the rotating member 801 and the clearance portion as shown in FIG. 6, improving the processing efficiency of the object to be stirred.

[0058] 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, resulting in large friction between the object to be stirred and the rotating member 800 and the inner surface of the container 2, generating high temperatures. 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 is reduced, and a flow is generated in which the relatively high temperature object to be stirred Fh is replaced by the relatively low temperature object to be stirred Fl, as shown in Figure 6, thereby suppressing the temperature rise of the object to be stirred. 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 above 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 can be further enhanced. On the other hand, if the width Wp of the first region is excessively small, the supply of the stirring target from the hole 802 formed in the first region 803 to the clearance portion is hindered. Therefore, the width Wp of the first region is preferably set to Wp>0.01H More preferably, Wp>0.02H More preferably, Wp>0.03H It is desirable to satisfy the following relationship.

[0059] In general, in a thin film swirling type stirrer, the aperture ratio P of the multiple holes 802 formed in the cylindrical portion 801 affects the shear force applied to the object to be stirred and the supply speed 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 multiple holes 802 formed in the tubular portion 801 becomes smaller, the contact area between the tubular portion 802 and the object to be stirred becomes larger, and the shear force applied to the object to be stirred also becomes larger, whereas when the aperture ratio P of the holes becomes larger, the contact area between the tubular portion 801 and the object to be stirred becomes smaller, and the shear force applied to the object to be stirred also becomes smaller. On the other hand, when the aperture ratio P of the multiple holes 802 formed in the cylindrical portion 801 becomes smaller, the supply speed of the stirring object from the inside of the cylindrical portion 801 of the rotating member 800 to the clearance portion becomes smaller, whereas when the aperture ratio of the holes becomes larger, the supply speed of the stirring object becomes larger. 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, P1>0 The relationship is set to satisfy: In this manner, by arranging the second region 804 having a small opening ratio of the multiple 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 to be performed.

[0060] On the other hand, in the second region 804, the opening rate of the multiple holes 802 is small, and the supply speed of the stirring object from the inside of the tubular portion 801 of the rotating member 800 to the clearance portion is small. However, as described above, in the clearance portion, the pressure of the stirring object present in the portion facing the first region 803 of the tubular portion 801 of the rotating member 800 is higher than the pressure of the stirring object present in the portion facing the second region 804. As a result, the stirring object rotates and a flow is generated that moves from the center of the height of the tubular portion 801 toward the upper and lower ends of the tubular portion 801, as shown in Figure 6. This compensates for this point. That is, the object to be stirred is supplied in a concentrated manner to the clearance portion from holes 802 formed in a first region 803 arranged in a portion including the center of the height direction of the cylindrical portion 801 of the rotating member 800, and is covered by being supplied to the clearance portion facing the second region 804 by flows moving respectively toward the upper and lower ends of the cylindrical portion 801.

[0061] Furthermore, in this embodiment, the multiple holes 802 penetrating inward and outward directions through the first region 803 of the tubular portion 801 of the rotating member 800 have an inward opening area larger than its outward opening area, thereby promoting the supply of the stirring object from the inside of the tubular portion 801 of the rotating member 800 to the clearance portion, and making it possible to further increase the pressure of the stirring object present in the portion of the clearance portion facing the first region 803 of the tubular portion 801 of the rotating member 800. This promotes a flow in which the object to be stirred moves from the center in the height direction of the cylindrical portion 801 toward the upper and lower ends of the cylindrical portion while swirling. As a result, 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, thereby further enhancing 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 being able to apply a large shear force to the object to be stirred 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, P1>0 More preferably, 0≦P2 / P1<0.1, P1>0 More preferably, 0≦P2 / P1<0.05, P1>0 It is desirable to set it so that the following relationship is satisfied.

[0062] Furthermore, in this embodiment, the internal space of the cylindrical portion 801 of the rotating member 800 is divided into an upper space 807 and a lower space 808 by the horizontal portion 806. However, if the horizontal portion 806 is made non-perforated to isolate the upper space 807 and the lower space 808, the flow of the object to be stirred between the upper space 807 and the lower space 808 via the horizontal portion 806 is blocked. This ensures more reliable circulation of the object to be stirred between the inside of the cylindrical portion 801 of the rotating member 800 and the clearance portion, thereby more reliably achieving the effects of improving the processing efficiency of the object to be stirred, suppressing the temperature rise of the object to be stirred, and enabling a large shear force to be applied to the object to be stirred to perform a sufficient stirring process.

[0063] In this embodiment, the first region 803 is disposed in a portion including the center of the cylindrical portion 801 in the height direction. When the first region 803 is positioned in this manner, 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, and the circulation of the object to be stirred between the inside of the rotating member 800 and the clearance portion can be more reliably achieved, thereby more reliably achieving 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, thereby enabling sufficient stirring processing to be performed.

[0064] Furthermore, when 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, the first region 803 can also be positioned in the portion where the horizontal portion 806 of the cylindrical portion 801 is connected. In this way, 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, and the circulation of the object to be stirred between the inside of the rotating member 800 and the clearance portion can be more reliably achieved, thereby more reliably achieving the 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, thereby enabling sufficient stirring processing to be performed.

[0065] At least one of the portion of the cylindrical portion 801 having a polygonal outer shape and the portion of the inner wall of the container 2 having a polygonal outer shape can be made of ceramics. In this way, when at least one of the portion formed on the cylindrical portion 801 and the portion formed on the inner wall of the container 2 and having a polygonal outer shape is formed from ceramics, the wear resistance of the portion formed on the cylindrical portion 801 and the portion formed on the inner wall of the container 2 and having a polygonal outer shape is improved. Furthermore, when this part is made of ceramics, there is a problem of temperature rise in the object to be stirred due to reduced heat dissipation compared to when it is made of metal; however, the circulation of the object to be stirred between the inside of the rotating member 800 and the clearance portion suppresses the temperature rise in the object to be stirred, thereby offsetting the problem of reduced heat dissipation caused by forming it from ceramics. Regarding the formation of ceramics, it is not necessary to form the entire rotating member 800 or the container 2 from ceramics, and a ceramic layer may be formed on the surface portion of the rotating member 800 or the container 2 . The ceramic layer can be formed by a method such as thermal spraying of ceramics or lamination of ceramic materials. Usable ceramics include zirconium oxide (ZrO2), aluminum oxide (Al2O3), titanium carbide (TiC), silicon nitride (Si3N4), and the like.

[0066] In this embodiment, the diameter of the rotating member 800 is 77 mm, and the diameter of the inner wall surface of the container 2 is 80 mm. The width of the narrow portion 814 is set to 1 mm, and the width of the wide portion 815 is set to 2 mm, but the dimensions of the rotating member 800 and the container 2, and the widths of the narrow portion 814 and the wide portion 815 can be increased or decreased as necessary. The width of the narrow portion 814 is preferably set to 0.1 to 3 mm, and more preferably 0.5 to 2 mm. On the other hand, the width of the wide portion 815 is preferably set to 0.5 to 5 mm, and more preferably 1 to 4 mm.

[0067] Example 3 The stirring device of the third embodiment has the same configuration as the stirring device 1 of the first embodiment, except for the rotating member 800 and the container 2. FIG. 8 is a side view of a rotating member 800 according to the third embodiment. As shown in FIG. 3 of the first embodiment, the cylindrical portion 801 is formed with a portion whose outer shape in a cross section perpendicular to the central axis of the rotating member 800 is polygonal. As shown in FIG. 8, on the side surface of the cylindrical portion 801, a side 810 formed by vertices 809 of a polygon is formed so as to be inclined with respect to the central axis direction of the rotating member 800. When side 810 formed by vertices 809 of a polygon is formed in this manner, the flow of the object to be stirred in the clearance section, in which the object to be stirred rotates while moving toward the upper or lower end of cylindrical section 801, is promoted, the residence time of the object to be stirred in the clearance section is reduced, and the effect of suppressing the temperature rise of the object to be stirred is enhanced. In this embodiment, the inclination angle of side 810 formed by vertices 809 of the polygon with respect to the central axis of the rotating member 800 is set to 15°, but this can be changed in the range of 5° to 85°, and it is preferable to set it in the range of 5° to 45°, as this can further enhance the effects of the present invention.

[0068] Further, on the inner wall surface of the container 2, as shown in FIG. 4 of the first embodiment, a portion is formed whose outer shape in a cross section perpendicular to the central axis of the container 2 is polygonal. The portion having a polygonal outer shape is formed in a portion of the inner wall surface of the container 2 that faces the portion having a polygonal outer shape of the rotating member 800 (not shown). Furthermore, on the inner wall surface of the container 2, a side 813 formed by the vertices 812 of a polygon is formed so as to be inclined with respect to the central axis direction of the container 2 (not shown). In this embodiment, the inclination direction of the side 813 formed by the vertices 812 of the polygon with respect to the central axis direction of the container 2 is inclined in the opposite direction to the inclination direction of the rotating member 800 with respect to the rotation direction of the rotating member 800, at the same angle as the inclination angle of the rotating member 800, but it can also be inclined in the same direction as the inclination direction of the rotating member 800. However, tilting it in the opposite direction to the tilting direction of the rotating member 800 is preferable because it generates turbulence when the object to be stirred is stirred, thereby increasing the shear force that the object to be stirred experiences, and it also reduces the residence time of the object to be stirred in the clearance portion, thereby enhancing the effect of suppressing the rise in temperature of the object to be stirred. In addition, in this embodiment, the inclination angle of side 813 formed by vertices 812 of the polygon of container 2 is set to 15°, but this can be changed in the range of 5° to 85°, and it is preferable to set it in the range of 5° to 45°, as this can further enhance the effects of the present invention. In this embodiment, an example has been shown in which a portion whose cross-sectional outline conforms to the configuration of this embodiment is formed on both the side surface of the cylindrical portion 801 and the inner wall surface of the container 2, but it is sufficient that a portion whose cross-sectional outline conforms to the configuration of this embodiment is formed on at least one of the side surface of the cylindrical portion 801 or the inner wall surface of the container 2, and it is preferable that a portion whose cross-sectional outline conforms to the configuration of this embodiment is formed on both the side surface of the cylindrical portion 801 and the inner wall surface of the container 2, as this enhances the effect. Other configurations of the rotating member 800 and the container 2 in this embodiment are the same as those in the first embodiment.

[0069] Example 4 The stirring device of the fourth embodiment has the same configuration as the stirring device of the first embodiment, except for the rotating member 800 and the container 2. FIG. 9 is a side view of a rotating member 800 according to the fourth embodiment. As shown in FIG. 3 of the first embodiment, the cylindrical portion 801 is formed with a portion whose outer shape in a cross section perpendicular to the central axis of the rotating member 800 is polygonal. As shown in FIG. 9, on the side surface of the cylindrical portion 801, a side 810 formed by vertices 809 of a polygon is formed so as to be inclined with respect to the central axis direction of the rotating member 800. The inclination direction of the edge 810 formed by the vertices 809 of the polygon is different on the side surface of the upper space 807 and the side surface of the lower space 808 of the cylindrical portion 801, and each is inclined in a direction that is mirror symmetric on either side of the boundary between the side surface of the upper space 807 and the side surface of the lower space 808. When side 810 formed by vertices 809 of a polygon is formed in this manner, the flow of the object to be stirred in the clearance section, in which the object to be stirred rotates and moves from the center of the height of the cylindrical section toward the upper or lower end of the cylindrical section, reduces the residence time of the object to be stirred in the clearance section, and enhances the effect of suppressing the temperature rise of the object to be stirred. In this embodiment, the absolute value of the inclination angle of edge 810 formed by vertices 809 of the polygon with respect to the central axis direction of the rotating member 800 is set to 15° on each of the side surfaces of the upper space 807 and the lower space 808, but this can be changed in the range of 5° to 85°, and it is preferable to set it in the range of 5° to 45°, as this can further enhance the effects of the present invention. In addition, in this embodiment, the absolute value of the inclination angle of the side 810 formed by the vertices 809 of the polygon is set to be the same on the side surface of the upper space 807 and the side surface of the lower space 808 of the tubular portion 801, but it is also permissible to make them different as necessary.

[0070] Further, on the inner wall surface of the container 2, as shown in FIG. 4 of the first embodiment, a portion is formed whose outer shape in a cross section perpendicular to the central axis of the container 2 is polygonal. The portion having a polygonal outer shape is formed in a portion of the inner wall surface of the container 2 that faces the portion of the rotating member 800 having a polygonal outer shape. Furthermore, on the inner wall surface of the container 2, a side 813 formed by the vertices 812 of a polygon is formed so as to be inclined with respect to the central axis direction of the container 2 (not shown). The inclination direction of the side 813 formed by the vertices 812 of the polygon is different in the parts of the inner wall surface of the container 2 that face the side surface of the upper space 807 and the side surface of the lower space 808 of the cylindrical portion 801, and each is inclined in a direction that is mirror symmetrical on either side of the part that faces the boundary between the side surface of the upper space 807 and the side surface of the lower space 808. In this embodiment, the inclination direction of edge 813 formed by the vertices 812 of the polygon with respect to the central axis direction of container 2 is inclined in the opposite direction to the inclination direction of edge 810 on the side surface of upper space 807 and the side surface of lower space 808 of cylindrical portion 801 in each of the portions of the inner wall surface of container 2 facing the side surface of upper space 807 and the side surface of lower space 808 of cylindrical portion 801, but it can also be inclined in the same direction as the inclination direction of rotating member 800. However, it is preferable to incline the rotating member 800 in the opposite direction to the inclination direction with respect to the central axis direction, since this further enhances the effect of the present invention. In addition, in this embodiment, the absolute value of the inclination angle of side 813 formed by vertices 812 of the polygon with respect to the central axis direction of container 2 is set to 15°, but this can be changed in the range of 5° to 85°, and it is preferable to set it in the range of 5° to 45°, as this can further enhance the effects of the present invention. In addition, in this embodiment, the absolute value of the inclination angle of the side 813 formed by the vertices 812 of the polygon is set to be the same in the parts facing the side surface of the upper space 807 and the side surface of the lower space 808 of the tubular portion 801, but it is also permissible to make them different as necessary. In this embodiment, an example has been shown in which a portion whose cross-sectional outline conforms to the configuration of this embodiment is formed on both the side surface of the cylindrical portion 801 and the inner wall surface of the container 2, but it is sufficient that a portion whose cross-sectional outline conforms to the configuration of this embodiment is formed on at least one of the side surface of the cylindrical portion 801 or the inner wall surface of the container 2, and it is preferable that a portion whose cross-sectional outline conforms to the configuration of this embodiment is formed on both the side surface of the cylindrical portion 801 and the inner wall surface of the container 2, as this enhances the effect. Other configurations of the rotating member 800 and the container 2 in this embodiment are the same as those in the first embodiment.

[0071] Example 5 The stirring device of the fifth embodiment has the same configuration as the stirring device of the first embodiment, except for the rotating member 800 and the container 2. FIG. 10 is a side view of a rotating member 800 according to the fifth embodiment. As shown in FIG. 3 of the first embodiment, the cylindrical portion 801 is formed with a portion whose outer shape in a cross section perpendicular to the central axis of the rotating member 800 is polygonal. As shown in FIG. 10, on the side surface of the cylindrical portion 801, a side 810 constituted by vertices 809 of a polygon is formed parallel to the central axis direction of the rotating member 800. The spacing between sides 810 formed by vertices 809 of the polygon is different at the center of tubular portion 801 (A in FIG. 10) and at the upper and lower ends of tubular portion 801 (from the upper end of tubular portion 801 to the upper end of the central portion and from the lower end of tubular portion 801 to the lower end of the central portion (B in FIG. 10)). Specifically, in the central part of the tubular portion 801, the outer shape in a cross section perpendicular to the central axis of the rotating member 800 is a icosagon, while at the upper and lower ends of the tubular portion 801, it is a decagon, and the spacing between sides 810 formed by the vertices 809 of the polygon is relatively narrower in the central part of the tubular portion 801 and wider at the upper and lower ends of the tubular portion 801. By forming side 810 composed of vertices 809 of a polygon in this manner, it is possible to increase the shear force that the stirring object receives at the center of tubular portion 801, and it is also possible to suppress heat generation in the upper or lower end regions of the tubular portion, thereby enhancing the effect of suppressing the temperature rise of the stirring object. In this embodiment, an example has been shown in which the central portion of the cylindrical portion 801 is a regular icosagon and the upper and lower ends of the cylindrical portion 801 are regular decagons, but the number of corners of the polygon can be changed as necessary. However, if the number of corners of the polygon is excessively large, the outer shape of the rotating member 800 will become closer to a circle, and the effect of the present invention will be reduced, so it is preferable that the number of corners of the polygon be 30 or less, more preferably 20 or less, and even more preferably 10 or less. In addition, in this embodiment, a configuration is shown in which the number of corners of the polygon in the central part of the tubular portion 801 is greater than the number of corners of the polygon at the upper and lower ends. However, conversely, a configuration in which the number of corners of the polygon in the central part of the tubular portion 801 is less than the number of corners of the polygon at the upper and lower ends can also be used.

[0072] Further, on the inner wall surface of the container 2, as shown in FIG. 4 of the first embodiment, a portion is formed whose outer shape in a cross section perpendicular to the central axis of the container 2 is polygonal. The portion having a polygonal outer shape is formed in a portion of the inner wall surface of the container 2 that faces the portion having a polygonal outer shape of the rotating member 800 (not shown). Furthermore, on the inner wall surface of the container 2, sides 813 formed by the vertices 812 of a polygon are formed parallel to the central axis direction of the container 2 (not shown). The intervals between sides 813 defined by vertices 812 of the polygon are different in the central portion and in the portions facing the upper and lower ends of the cylindrical portion 801 of the inner wall surface of the container 2 . Specifically, in the portion of the inner wall surface of container 2 facing the center of cylindrical portion 801, the outer shape in a cross section perpendicular to the central axis of container 2 is a icosagon, while in the portions facing the upper and lower ends of cylindrical portion 801, it is a decagon, and the spacing between sides 813 formed by vertices 812 of the polygon is relatively narrow in the portion facing the center of cylindrical portion 801 and wide in the portions facing the upper and lower ends of cylindrical portion 801. By forming side 813 composed of vertices 812 of a polygon in this manner, it is possible to increase the shear force that the object to be stirred receives in the portion of the inner wall surface of container 2 that faces the center of cylindrical portion 801, and it is also possible to suppress heat generation in the portion that faces the upper or lower end region of the cylindrical portion, thereby enhancing the effect of suppressing the temperature rise of the object to be stirred. In this embodiment, an example has been shown in which a portion whose cross-sectional outline conforms to the configuration of this embodiment is formed on both the side surface of the cylindrical portion 801 and the inner wall surface of the container 2, but it is sufficient that a portion whose cross-sectional outline conforms to the configuration of this embodiment is formed on at least one of the side surface of the cylindrical portion 801 or the inner wall surface of the container 2, and it is preferable that a portion whose cross-sectional outline conforms to the configuration of this embodiment is formed on both the side surface of the cylindrical portion 801 and the inner wall surface of the container 2, as this enhances the effect. Other configurations of the rotating member 800 and the container 2 in this embodiment are the same as those in the first embodiment.

[0073] Example 6 The stirring device of the sixth embodiment has the same configuration as the stirring device of the first embodiment, except for the rotating member 800 and the container 2. FIG. 11 is a side view of a rotating member 800 according to the sixth embodiment. As shown in FIG. 3 of the first embodiment, a cylindrical portion 801 of the rotating member 800 has a portion whose outer shape in a cross section perpendicular to the central axis of the rotating member 800 is polygonal. As shown in FIG. 11, on the side surface of the cylindrical portion 801, a side 810 formed by vertices 809 of a polygon is formed parallel to the central axis direction of the rotating member 800. The intervals between adjacent sides 810 constituting vertices 809 of the polygon are formed to vary along the circumferential direction of the cylindrical portion 801 . Specifically, the polygon is formed such that the intervals between adjacent sides 810 formed by vertices 809 of the polygon are arranged such that relatively wide and narrow intervals are alternately arranged in the circumferential direction of the cylindrical portion 801 . In this way, when edges 810 constituting vertices 809 of a polygon are formed, turbulence is generated in the stirring object when the stirring object, which is present in a film-like form between the rotating member and the inner wall surface, is stirred by the centrifugal force of the rotating member, resulting in a remarkable effect of increasing the shear force received by the stirring object. In this embodiment, a configuration has been shown in which the wide and narrow spacing between adjacent sides 810 are alternately repeated at regular intervals, but this is not limited to this, and a configuration in which a relatively wide portion, a medium portion, a narrow portion, and a medium portion are periodically repeated is also possible.

[0074] Further, on the inner wall surface of the container 2, as shown in FIG. 4 of the first embodiment, a portion is formed whose outer shape in a cross section perpendicular to the central axis of the container 2 is polygonal. The portion having a polygonal outer shape is formed in a portion of the inner wall surface of the container 2 that faces the portion having a polygonal outer shape of the rotating member 800 (not shown). Furthermore, on the inner wall surface of the container 2, sides 813 formed by the vertices 812 of a polygon are formed parallel to the central axis direction of the container 2 (not shown). The intervals between adjacent sides 813 constituting vertices 812 of the polygon are formed to vary along the circumferential direction of the inner wall surface of the container 2 . Specifically, the intervals between adjacent sides 813 constituting vertices 812 of the polygon are formed such that relatively wide portions and narrow portions alternate in the circumferential direction of the inner wall surface of container 2 . In this way, when the edges 813 constituting the vertices 812 of the polygon are formed, turbulence is generated in the stirring object when the stirring object, which is present in a film-like form between the rotating member and the inner wall surface, is stirred by the centrifugal force of the rotating member, resulting in a remarkable effect of increasing the shear force received by the stirring object. In this embodiment, a configuration has been shown in which the wide and narrow spacing between adjacent sides 813 are alternately repeated at regular intervals, but this is not limited to this, and a configuration in which a relatively wide portion, a medium portion, a narrow portion, and a medium portion are periodically repeated is also possible. In this embodiment, an example has been shown in which a portion whose cross-sectional outline conforms to the configuration of this embodiment is formed on both the side surface of the cylindrical portion 801 and the inner wall surface of the container 2, but it is sufficient that a portion whose cross-sectional outline conforms to the configuration of this embodiment is formed on at least one of the side surface of the cylindrical portion 801 or the inner wall surface of the container 2, and it is preferable since the effect is particularly enhanced when a portion whose cross-sectional outline conforms to the configuration of this embodiment is formed on both the side surface of the cylindrical portion 801 and the inner wall surface of the container 2. Other configurations of the rotating member 800 and the container 2 in this embodiment are the same as those in the first embodiment.

[0075] (Comparative Example) The agitator of the comparative example has the same configuration as the agitator of the first embodiment, except for the rotating member 8 and the container 2. Fig. 12 shows a rotating member 8 of a comparative example. Fig. 12(a) is a cross-sectional view of the rotating member 8, showing the cross section taken along line AA in Fig. 12(b). Fig. 12(b) is a top view of the rotating member 8. Fig. 12(c) is a side view of the rotating member 8. The cylindrical portion 24 of the rotating member 8 has a circular outer shape in a cross section perpendicular to the central axis of the rotating member 8, without forming any portion that has a polygonal outer shape. In addition, the side surface of the cylindrical portion 24 of the rotating member 8 is not divided into a first region and a second region, and a plurality of holes 30 are formed that penetrate inwardly and outwardly over almost the entire side surface of the cylindrical portion 24, except for a portion including the center of 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.

[0076] According to the rotating member 8, the material to be stirred is supplied to the clearance portion from inside the cylindrical portion 24 of the rotating member 8 relatively evenly through a plurality of holes 30 that penetrate inwardly and outwardly over almost the entire side surface of the cylindrical portion 24. Furthermore, the inner wall surface of the container 2 does not have a polygonal outer shape in a cross section perpendicular to the central axis of the container 2, and the outer shape is circular (not shown). For this reason, in this comparative example, the flow in which the object to be stirred rotates and moves from the center of the height 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 13. For this reason, 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 applying a large shear force to the object to be stirred to perform sufficient stirring processing cannot be fully realized.

[0077] The stirring device according to the present invention is not limited to the above-mentioned embodiment, and the specific configuration of each part of the stirring device according to the present invention can be freely designed in various ways. [Explanation of symbols]

[0078] 1 Stirring device 2 containers 4 Outer layer 6 Water cooling piping 8,800 Rotating parts 10 Shaft 12 Weir plate 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 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 has a cylindrical portion positioned with a small gap between it and an inner wall surface of the container, the cylindrical portion is formed with a portion having a polygonal outer shape in a cross section perpendicular to a central axis of the rotating member, The cylindrical portion of the rotating member is formed with a plurality of holes penetrating in an inward and outward direction and connecting the internal space of the rotating member to the outside. A stirring device characterized by:

2. 2. The stirring device according to claim 1, wherein an inner wall of the container is formed with a portion having a polygonal outer shape in a cross section perpendicular to a central axis of the container.

3. 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 has a cylindrical portion positioned with a small gap between it and an inner wall surface of the container, The container has an inner wall formed with a portion having a polygonal outer shape in a cross section perpendicular to a central axis of the container, The cylindrical portion of the rotating member is formed with a plurality of holes penetrating in an inward and outward direction and connecting the internal space of the rotating member to the outside. A stirring device characterized by:

4. 3. The stirring device according to claim 1, wherein the sides defined by the vertices of the polygon are formed on the outer peripheral surface of the cylindrical portion in a direction parallel to the central axis of the rotating member.

5. 4. The stirring device according to claim 2, wherein the sides defined by the vertices of the polygon are formed on the inner wall of the container so as to be parallel to a central axis direction of the container.

6. The cylindrical portion of the rotating member is formed with a plurality of holes penetrating in an inward and outward direction, 5. The stirring device according to claim 4, wherein the holes and the sides formed by the vertices of the polygon are arranged alternately in the circumferential direction of the cylindrical portion on the outer peripheral surface of the cylindrical portion.

7. The rotating member 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, a first 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, and 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 such 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 on a side surface of the upper space of the cylindrical portion and a side surface of the lower space of the cylindrical portion on the horizontal portion side, The second region is disposed from an upper end of the first region on a side surface of the upper space of the cylindrical portion to the upper end of the cylindrical portion, and from a lower end of the first region on a side surface of the lower space of the cylindrical portion to the lower end of the cylindrical portion, The plurality of holes formed in the first region and penetrating in an inward and outward direction are arranged in three or less rows in the circumferential direction of the cylindrical portion.

4. The stirring device according to claim 1 or 3.

8. 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 P1>0 8. The stirring device according to claim 7, wherein the following relationship is satisfied:

9. A side surface of the cylindrical portion of the rotating member is partitioned into a band-like shape in the circumferential direction of the cylindrical portion, and a first region having a plurality of holes penetrating 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 second region is disposed from an upper end of the cylindrical portion to an upper end of the first region and from a lower end of the cylindrical portion to a lower end of the first region, 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 4. The stirring device according to claim 1, wherein the following relationship is satisfied:

10. 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 P1>0 10. The stirring device according to claim 9, wherein the following relationship is satisfied:

11. An agitation device as described in Claim 9, characterized in that the first region is arranged in a portion including the center of the height direction of the tubular portion.

12. The rotating member has a horizontal portion inside the cylindrical portion that is perpendicular to the rotation axis of the rotating member, The agitation device according to claim 9 , wherein the first region is disposed at a portion where the horizontal portion of the cylindrical portion is connected.

13. An agitation device as described in claim 1 or 3, characterized in that at least one of the portions having a polygonal outer shape formed on the cylindrical portion or the portions having a polygonal outer shape formed on the inner wall of the container is formed of ceramics.

Images