Defoaming device

Abstract

The present invention provides a defoaming device that can suppress the decrease in defoaming efficiency caused by the limited amount of liquid substance that can be supplied to the rotating container. [Solution] The degassing device 100 comprises a cylindrical vacuum container 10 including a top wall 11, a bottom wall 12, and an outer peripheral wall 13 connecting the top wall 11 and the bottom wall 12. The degassing device 100 comprises a rotating container 30 that rotates around a rotating shaft 20 (rotation axis), and a supply unit 40 that supplies slurry (liquid substance) to the rotating container 30. The rotating container 30 has openings 33a (33b) formed therein that scatter the slurry to which centrifugal force is applied by rotation. The rotating shaft 20 extends in line with the central axis α of the vacuum container 10.

Description

Technical Field

[0001] This disclosure relates to a defoaming device.

Background Art

[0002] Japanese Unexamined Patent Application Publication No. 2017-006814 (Patent Document 1) discloses a continuous defoaming device that defoams a liquid substance in a vacuum container. The continuous defoaming device includes a supply means for supplying a liquid substance into the vacuum container, and a rotating container for receiving the liquid substance supplied from the supply means. The rotating container is fixed to a rotating shaft and rotates as the rotating shaft rotates. At this time, the liquid substance in the rotating container scatters around. The liquid substance scattered from the rotating container flows down along the inner wall surface of the vacuum container and moves to a liquid discharge pump provided at the bottom of the vacuum container. The liquid discharge pump includes a liquid transfer section for transferring the liquid substance. The liquid transfer section is rotated by a drive shaft. The drive shaft connects the liquid transfer section and a motor. Although not specified in Patent Document 1 above, the drive shaft extends along the central axis of the vacuum container. The rotating shaft extends parallel to the drive shaft.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the continuous defoaming device described in Patent Document 1 above, as described above, since the drive shaft extends along the central axis of the vacuum container, the distance between the rotating shaft and the inner wall surface of the vacuum container is relatively small in order to avoid interference with the drive shaft. Therefore, the size of the rotating container is limited. In this case, it is conceivable that the defoaming efficiency of the defoaming device decreases due to the limited amount of liquid substance that can be supplied to the rotating container.

[0005] This disclosure was made to solve the above problems, and its purpose is to provide a defoaming device that can suppress the decrease in defoaming efficiency caused by the limited amount of liquid substance that can be supplied to the rotating container. [Means for solving the problem]

[0006] An energy storage device according to one aspect of the present disclosure comprises a cylindrical vacuum vessel including a top wall, a bottom wall, and an outer peripheral wall connecting the top wall and the bottom wall; at least one rotating vessel that rotates about a rotation axis; and a supply unit that supplies a liquid substance to at least one rotating vessel. At least one rotating vessel has an opening formed therein for scattering the liquid substance to which centrifugal force is applied by rotation. The rotation axis extends in line with the central axis of the vacuum vessel.

[0007] In an energy storage device according to one aspect of this disclosure, as described above, the rotating shaft extends in line with the central axis of the vacuum vessel. This allows for a larger distance between the rotating shaft and the outer wall compared to the case where the rotating shaft is spaced apart from the central axis. As a result, the rotating vessel can be made larger. This helps to suppress a decrease in the defoaming efficiency of the defoaming device, which can occur due to limitations on the amount of liquid substance that can be supplied to the rotating vessel.

[0008] At least one rotating container may include multiple rotating containers. The multiple rotating containers may be positioned at different locations in the direction in which the central axis extends. This configuration allows for the arrangement of multiple rotating containers in multiple stages. As a result, liquid material can be supplied to multiple rotating containers simultaneously. This increases the amount of liquid material that can be supplied compared to the case with only one rotating container. Furthermore, interference between rotating containers can be easily suppressed compared to the case where the rotating containers are arranged side by side in a plane intersecting the central axis. This allows for easy enlargement of each rotating container.

[0009] The degassing device may further include an inner circumferential wall provided along the outer circumferential wall within the vacuum vessel. The multiple rotating vessels may include a first rotating vessel and a second rotating vessel. The inner circumferential wall may be positioned so as to contact the liquid substance scattered from the second rotating vessel without contacting the liquid substance scattered from the first rotating vessel. With this configuration, the liquid substance from the first rotating vessel can be scattered to the outer circumferential wall, and the liquid substance from the second rotating vessel can be scattered to the inner circumferential wall. As a result, mixing of the liquid substance from the first rotating vessel and the liquid substance from the second rotating vessel can be suppressed. This can suppress the thickening of the liquid film of the liquid substance. As a result, the retention of air bubbles in the liquid substance can be suppressed.

[0010] The inner circumferential wall may be positioned at a distance from the outer circumferential wall and in a non-contact manner with the outer circumferential wall. With this configuration, the liquid substance from the first rotating container that has been scattered on the outer circumferential wall can be easily discharged through the space between the inner circumferential wall and the outer circumferential wall. As a result, mixing of the liquid substance from the first rotating container and the liquid substance from the second rotating container can be further suppressed.

[0011] At least one rotating vessel may include a circular bottom portion and a circumferential portion extending from the outer edge of the bottom portion toward the top wall. The vacuum vessel may have a cylindrical shape. The inner diameter of the circumferential portion may be at least half the inner diameter of the outer wall of the vacuum vessel. This configuration allows for an increase in the amount of liquid substance that can be supplied to the rotating vessel compared to the case where the inner diameter of the circumferential portion is less than half the inner diameter of the circumferential wall. [Effects of the Invention]

[0012] According to this disclosure, it is possible to suppress the decrease in the defoaming efficiency of the defoaming device caused by the limited amount of liquid substance that can be supplied to the rotating container. [Brief explanation of the drawing]

[0013] [Figure 1] This is a cross-sectional view showing the configuration of a defoaming device according to one embodiment. [Figure 2]This is a cross-sectional view along line II-II in Figure 1. [Figure 3] This is a cross-sectional view along line III-III in Figure 1. [Figure 4] This is a magnified view of the area near the inner circumferential wall in Figure 1. [Figure 5] This is a cross-sectional view showing the configuration of a defoaming device according to a first modified example of one embodiment. [Figure 6] This is a cross-sectional view showing the configuration of a defoaming device according to a second modification of one embodiment. [Modes for carrying out the invention]

[0014] Embodiments of this disclosure will be described with reference to the drawings. In the drawings referred to below, the same or equivalent components are given the same number.

[0015] The defoaming apparatus 100 in the embodiment of this disclosure will be described with reference to Figures 1 to 4. In this specification, the Z direction refers to the vertical direction. The Z1 direction and Z2 direction refer to the upward and downward directions, respectively.

[0016] The defoaming device 100 is used, for example, to remove air bubbles from the positive electrode (or negative electrode) slurry of a lithium-ion secondary battery installed in an electric vehicle. However, the applications of the defoaming device 100 are not limited to the above example. The slurry is an example of the "liquid substance" as defined herein.

[0017] Figure 1 is a cross-sectional view showing the configuration of the defoaming apparatus 100. The defoaming apparatus 100 comprises a vacuum vessel 10, a rotating shaft 20, at least one rotating vessel 30, a supply unit 40, a motor 50 for the rotating shaft, a vacuum pump 60, a discharge pump 70, and an inner circumferential wall 80. In this embodiment, the defoaming apparatus 100 comprises two rotating vessels 30. The rotating shaft 20 is an example of the "rotating shaft" in this disclosure.

[0018] The vacuum container 10 is a cylindrical container that includes a top wall 11, a bottom wall 12, and an outer periphery wall 13. Specifically, the vacuum container 10 has a cylindrical shape.

[0019] The top wall 11 forms the end face on the Z1 side of the vacuum vessel 10. The top wall 11 is orthogonal to the Z direction.

[0020] The outer peripheral wall 13 extends from the outer peripheral edge of the top wall 11 toward the Z2 side. The outer peripheral wall 13 extends in the Z direction. The outer peripheral wall 13 surrounds the two rotary vessels 30.

[0021] The bottom wall 12 is provided at the bottom of the vacuum vessel 10. The bottom wall 12 has a first peripheral wall 12a, a second peripheral wall 12b, and a bottom wall 12c. [[ID=I3]]

[0022] The first peripheral wall 12a extends from the lower end portion of the outer peripheral wall 13 toward the Z2 side. Specifically, the first peripheral wall 12a is inclined so as to approach the central axis α of the vacuum vessel 10 as it goes toward the Z2 side. In other words, the first peripheral wall 12a has a tapered shape in which the inner diameter becomes smaller as it goes toward the Z2 side. The central axis α extends in the Z direction.

[0023] The second peripheral wall 12b extends from the lower end portion of the first peripheral wall 12a toward the Z2 side. The second peripheral wall 12b extends in the Z direction.

[0024] The bottom wall 12c forms the end face on the Z2 side of the vacuum vessel 10. The bottom wall 12c is connected to the lower end portion of the second peripheral wall 12b. In other words, the second peripheral wall 12b extends from the outer peripheral edge of the bottom wall 12c toward the Z1 side. A recess 12d is formed by the second peripheral wall 12b and the bottom wall 12c.

[0025] The rotary shaft 20 extends in the Z direction. The rotary shaft 20 penetrates the top wall 11 of the vacuum vessel 10 and is inserted into the vacuum vessel 10. The lower end 21 of the rotary shaft 20 is provided inside the vacuum vessel 10. The upper portion of the rotary shaft 20 is connected to the rotary shaft motor 50. When the rotary shaft motor 50 is driven, the rotary shaft 20 is rotated. The rotary shaft 20 rotates about the central axis (not labeled) of the rotary shaft 20.

[0026] The two rotating containers 30 include a rotating container 30a and a rotating container 30b. Each rotating container 30 is fixed to a rotating shaft 20. Therefore, each rotating container 30 rotates around the rotating shaft 20. Rotating container 30a has the same shape and size as rotating container 30b. Rotating containers 30a and 30b are examples of the "first rotating container" and "second rotating container" of this disclosure, respectively.

[0027] Rotating containers 30a and 30b are positioned at different locations in the Z direction. Rotating container 30a is positioned closer to the Z1 side (towards the top wall 11) than rotating container 30b.

[0028] The rotating container 30a has a bottom surface 31a and a circumferential surface 32a. The bottom surface 31a constitutes the Z2 side end face of the rotating container 30a. The bottom surface 31a is perpendicular to the Z direction. The bottom surface 31a has a circular shape.

[0029] The circumferential portion 32a extends from the outer peripheral edge of the bottom portion 31a toward the Z1 side (towards the top wall 11). The inner diameter R11 (Figure 2) of the circumferential portion 32a increases toward the Z1 side. In other words, the rotating container 30a has a mortar shape.

[0030] The rotating container 30a is open on the Z1 side. Specifically, an opening 33a is formed at the upper end of the rotating container 30a. The opening 33a is formed by the upper end of the circumferential surface portion 32a.

[0031] A through-hole 34a is formed in the bottom surface 31a through which the rotating shaft 20 passes. The rotating container 30a may be fixed to the rotating shaft 20 by connecting (for example, welding) the inner surface of the through-hole 34a to the outer surface of the rotating shaft 20. The through-hole 34a is formed in the center of the bottom surface 31a.

[0032] The rotating container 30b has a bottom surface 31b and a circumferential surface 32b. The bottom surface 31b constitutes the Z2 side end face of the rotating container 30b. The bottom surface 31b is perpendicular to the Z direction. The bottom surface 31b has a circular shape.

[0033] The circumferential portion 32b extends from the outer peripheral edge of the bottom portion 31b toward the Z1 side (towards the top wall 11 side). The inner diameter R12 (Figure 3) of the circumferential portion 32b increases toward the Z1 side. In other words, the rotating container 30b has a mortar shape.

[0034] The rotating container 30b is open on the Z1 side. Specifically, an opening 33b is formed at the upper end of the rotating container 30b. The opening 33b is formed by the upper end of the circumferential surface portion 32a.

[0035] A through-hole 34b is formed in the bottom portion 31b through which the rotating shaft 20 passes. The rotating container 30b may be fixed to the rotating shaft 20 by connecting (for example, welding) the inner surface of the through-hole 34b to the outer surface of the rotating shaft 20. The through-hole 34b is formed in the center of the bottom portion 31b. Alternatively, instead of a through-hole 34b, a hole may be formed through which the rotating shaft 20 is inserted without passing through. Furthermore, the bottom portion 31b may not have a through-hole 34b or the aforementioned hole, and the bottom portion 31b and the lower end 21 of the rotating shaft 20 may be connected (for example, by welding).

[0036] The supply unit 40 supplies the slurry described above into the vacuum container 10. The supply unit 40 includes a liquid transfer pump 41, a supply pipe 42, and a supply pipe 43. The liquid transfer pump 41 delivers the slurry to each of the supply pipes 42 and 43. Each of the supply pipes 42 and 43 penetrates the top wall 11 and is inserted into the vacuum container 10.

[0037] The tip of the supply pipe 42 is positioned inside the rotating container 30a through the opening 33a. This ensures that the slurry flowing through the supply pipe 42 is supplied to the rotating container 30a.

[0038] The tip of the supply pipe 43 is positioned inside the rotating container 30b through the opening 33b. This ensures that the slurry flowing through the supply pipe 43 is supplied to the rotating container 30b.

[0039] The vacuum pump 60 is connected to piping 61. Piping 61 penetrates the top wall 11 and is inserted into the vacuum container 10. When the vacuum pump 60 is driven in this state, the inside of the vacuum container 10 is evacuated.

[0040] The discharge pump 70 is connected to the piping 71. The piping 71 penetrates the bottom wall 12c and is inserted into the vacuum vessel 10. When the discharge pump 70 is driven in this state, the slurry accumulated in the recess 12d is discharged.

[0041] As the rotating shaft 20 rotates, centrifugal force is applied to the slurry supplied to the rotating container 30a. As a result, the slurry inside the rotating container 30a is scattered from the opening 33a to the outer wall 13. The slurry that has scattered to the outer wall 13 flows downward along the outer wall 13. In Figure 1, the flow of slurry inside the vacuum container 10 is represented by a dashed-dotted arrow. Subsequently, the slurry flows down along the first outer wall 12a and into the recess 12d.

[0042] In conventional defoaming devices, the drive shaft that drives the liquid transfer section that discharges liquid substances such as slurry to the outside of the vacuum container extends along the central axis of the vacuum container. Therefore, to avoid interference with the drive shaft, the distance between the rotating shaft and the inner wall surface of the vacuum container is relatively small. This limits the size of the rotating container. In this case, it is possible that the defoaming efficiency of the defoaming device will decrease due to the limited amount of liquid substance that can be supplied to the rotating container.

[0043] Therefore, in this embodiment, the rotating shaft 20 extends in line with the central axis α of the vacuum container 10. In other words, the central axis of the rotating shaft 20 and the central axis α of the vacuum container 10 coincide. This makes it possible to easily increase the size of the rotating container 30a (30b). In addition, in the degassing device 100 of this embodiment, the slurry is sucked out from below by the discharge pump 70, so the above-mentioned drive shaft is unnecessary.

[0044] The inner circumferential wall 80 is provided along the outer circumferential wall 13 of the vacuum vessel 10. Specifically, the inner circumferential wall 80 surrounds the rotating vessel 30b on the inside of the outer circumferential wall 13.

[0045] As the rotating shaft 20 rotates, centrifugal force is applied to the slurry supplied to the rotating container 30b. As a result, the slurry inside the rotating container 30b is scattered from the opening 33b to the inner circumferential wall 80. The slurry that has been scattered to the inner circumferential wall 80 flows down along the inner circumferential wall 80. Subsequently, the slurry flows down along the first circumferential wall 12a and into the recess 12d.

[0046] The inner circumferential wall 80 is fixed to the outer circumferential wall 13 by a connecting portion 81. The connecting portion 81 connects the outer circumferential surface of the inner circumferential wall 80 to the inner circumferential surface of the outer circumferential wall 13. For example, the connecting portion 81 may be welded to the outer circumferential surface of the inner circumferential wall 80 and the inner circumferential surface of the outer circumferential wall 13, respectively.

[0047] A gap C is formed between the lower end 82 of the inner circumferential wall 80 and the bottom wall 12 (first circumferential wall 12a) of the vacuum container 10. As a result, the slurry that flows down the outer circumferential wall 13 of the vacuum container 10 to the bottom wall 12 (first circumferential wall 12a) can move downward through the gap C.

[0048] Figure 2 is a cross-sectional view along the line II-II in Figure 1. There are four connecting parts 81. The four connecting parts 81 are provided at equal angular intervals (90-degree intervals in Figure 2) in the circumferential direction around the central axis α. Note that the number and arrangement of the connecting parts 81 are not limited to this.

[0049] The inner circumferential wall 80 is positioned at a distance from the outer circumferential wall 13 and is in a non-contact state with the outer circumferential wall 13. Specifically, the outer circumferential wall 13 has an inner diameter R1. The inner circumferential wall 80 has an inner diameter R2 that is smaller than the inner diameter R1. Both the inner diameter R1 and the inner diameter R2 are constant regardless of their position in the Z direction. Therefore, a space S with a width W in the radial direction of the vacuum container 10 is formed circumferentially between the outer circumferential wall 13 and the inner circumferential wall 80.

[0050] The circumferential surface portion 32a of the rotating container 30a has an inner diameter R11. The inner diameter R11 gradually increases (linearly) from the lower end to the upper end of the circumferential surface portion 32a.

[0051] The inner diameter R11 is at least half the inner diameter R1 of the outer wall 13 of the vacuum vessel 10. Specifically, the maximum value of the inner diameter R11 is at least half the inner diameter R1. On the other hand, the minimum value of the inner diameter R11 is less than half the inner diameter R1. However, the minimum value of the inner diameter R11 may be at least half the inner diameter R1.

[0052] Figure 3 is a cross-sectional view along the line III-III in Figure 1. The circumferential surface 32b of the rotating container 30b has an inner diameter R12. The inner diameter R12 gradually increases (linearly) from the lower end to the upper end of the circumferential surface 32b.

[0053] The inner diameter R12 is at least half the inner diameter R1 of the outer circumferential wall 13 of the vacuum vessel 10 (Figure 2). Specifically, the maximum value of the inner diameter R12 is at least half the inner diameter R1. On the other hand, the minimum value of the inner diameter R12 is less than half the inner diameter R1. However, the minimum value of the inner diameter R12 may be at least half the inner diameter R1. Furthermore, the maximum value of the inner diameter R12 is equal to the maximum value of the inner diameter R11 of the rotating vessel 30a (Figure 2). Furthermore, the minimum value of the inner diameter R12 is equal to the minimum value of the inner diameter R11.

[0054] Figure 4 is a partially enlarged view of the vicinity of the rotating container 30b and the inner circumferential wall 80. The inner circumferential wall 80 is positioned to come into contact with the slurry scattered from the rotating container 30b without coming into contact with the slurry scattered from the rotating container 30a.

[0055] Specifically, the upper end portion 83 of the inner circumferential wall 80 is positioned below the bottom portion 31a that constitutes the lower end surface of the rotating container 30a. This suppresses the scattering of slurry from the opening 33a formed at the upper end of the rotating container 30a onto the inner circumferential wall 80.

[0056] Furthermore, the upper end portion 83 of the inner circumferential wall 80 is positioned above the opening 33b of the rotating container 30b. Specifically, the upper end portion 83 is positioned above the point P where the extension line (dashed line in Figure 3) of the inner circumferential surface portion 32b of the rotating container 30b intersects with the inner circumferential wall 80. This makes it possible to suppress the scattering of slurry beyond the inner circumferential wall 80 to the outer circumferential wall 13 when a centrifugal force is applied and the slurry is scattered outward along the circumferential surface portion 32b.

[0057] As described above, in this embodiment, the rotating shaft 20 extends in line with the central axis α of the vacuum vessel 10. This makes it easy to enlarge the inner diameters (R11, R12) of the rotating vessels 30 (30a, 30b) fixed to the rotating shaft 20. As a result, it is possible to suppress the decrease in defoaming efficiency by the defoaming device 100 caused by the limiting of the amount of slurry that can be supplied to the rotating vessel 30.

[0058] [Differentiation] In the above embodiment, an example was shown in which the inner circumferential wall 80 surrounds the rotating container 30b, but the present disclosure is not limited thereto. The arrangement of the inner circumferential wall is not limited to the example in the above embodiment.

[0059] For example, the modified example shown in Figure 5 illustrates the configuration of a defoaming device 200. The defoaming device 200 includes an inner circumferential wall 180 instead of the inner circumferential wall 80 of the above embodiment. The inner circumferential wall 180 surrounds the rotating container 30a. The lower end portion 182 of the inner circumferential wall 180 is positioned on the Z1 side of the rotating container 30b. As a result, the slurry from the rotating container 30a is scattered to the inner circumferential wall 180 and flows downward along the inner circumferential wall 180. The slurry from the rotating container 30b is scattered to the outer circumferential wall 13 of the vacuum container 10 and flows downward along the outer circumferential wall 13. The inner circumferential wall 180 is fixed to the outer circumferential wall 13 by a plurality of connecting portions 181. The configuration of the connecting portions 181 may be the same as the connecting portion 81 of the above embodiment.

[0060] In the above embodiment, an example was shown in which the inner circumferential wall 80 is fixed to the outer circumferential wall 13 by a connecting portion 81, but the disclosure is not limited thereto. The inner circumferential wall may be fixed to a location other than the outer circumferential wall 13.

[0061] For example, the modified example shown in Figure 6 illustrates the configuration of a defoaming device 300. The defoaming device 300 includes an inner circumferential wall 280 instead of the inner circumferential wall 80 of the above embodiment. The inner circumferential wall 280 is fixed to the bottom wall 12 (first circumferential wall 12a) of the vacuum container 10. In addition, a plurality of notches 281 are formed at the lower end of the inner circumferential wall 280. The plurality of notches 281 may be provided at equal angular intervals (for example, 15-degree intervals) in the circumferential direction of the inner circumferential wall 280 with respect to the central axis α. Slurry flowing down along the outer circumferential wall 13 flows downward through the notches 281.

[0062] In the above embodiment, an example was shown in which the rotating container 30a has the same shape and size as the rotating container 30b, but the disclosure is not limited thereto. For example, the rotating container 30a may be larger than the rotating container 30b. Specifically, the inner diameter R11 of the circumferential surface portion 32a of the rotating container 30a may be larger than the inner diameter R12 of the circumferential surface portion 32b of the rotating container 30b. Furthermore, the maximum value of the inner diameter R11 may be greater than the maximum value of the inner diameter R11, and the minimum value of the inner diameter R11 may be equal to the minimum value of the inner diameter R11.

[0063] In the above embodiment, an example was shown in which the rotating shaft 20 coincides with the central axis α of the vacuum vessel 10, but the disclosure is not limited thereto. For example, the rotating vessel may be supported by a support shaft that intersects (for example, orthogonal to) the rotating shaft. For example, the rotating vessel may rotate around the support shaft by meshing a pinion provided at the tip of the rotating shaft with a rack formed on the rotating vessel. In this case, it is sufficient that the support shaft extends in line with the central axis of the vacuum vessel. Note that the support shaft is just one example of a "rotating shaft" in this disclosure.

[0064] In the above embodiment, an example is shown in which two rotating containers 30 are provided, but the disclosure is not limited thereto. Three or more rotating containers 30 may be provided. Alternatively, only one rotating container 30 may be provided.

[0065] In the above embodiment, an example was shown in which the inner circumferential wall 80 and the outer circumferential wall 13 are separated (not in contact), but the disclosure is not limited thereto. The inner circumferential wall and the outer circumferential wall may be in partial contact, and a partial gap may be formed between the inner circumferential wall and the outer circumferential wall. The gap may be formed, for example, by the inner circumferential surface of the outer circumferential wall, or by a recess (groove) provided on the outer circumferential surface of the inner circumferential wall.

[0066] In the above embodiment, an example was shown in which the inner circumferential wall 80 surrounds the rotating container 30b, but the disclosure is not limited thereto. For example, the inner circumferential wall does not have to surround the rotating container 30b, as long as it is provided on the trajectory of the slurry scattered from the rotating container 30b.

[0067] In the above embodiment, an example was shown in which the vacuum vessel 10 has a cylindrical shape, but the disclosure is not limited thereto. The vacuum vessel may have, for example, a rectangular tubular shape.

[0068] Furthermore, the configurations of the above embodiments and the various modified examples may be combined with each other.

[0069] It should be noted that the embodiments disclosed herein are illustrative in all respects and not restrictive. The scope of this disclosure is defined by the claims rather than the description of the embodiments above, and includes all modifications within the meaning and scope equivalent to the claims. [Explanation of Symbols]

[0070] 10 Vacuum vessel, 11 Top wall, 12 Bottom wall, 13 Outer wall, 20 Rotating shaft (rotating axis), 30 Rotating vessel, 30a Rotating vessel (first rotating vessel), 30b Rotating vessel (second rotating vessel), 31a, 31b Bottom surface, 32a, 32b Surrounding surface, 33a, 33b Opening, 40 Supply section, 80, 180, 280 Inner circumferential wall, 100, 200, 300 Degassing device, R1 Inner diameter (inner diameter of outer wall), R11, R12 Inner diameter (inner diameter of circumferential surface), α Central axis.

Claims

1. A cylindrical vacuum container including a top wall, a bottom wall, and an outer peripheral wall connecting the top wall and the bottom wall, A rotating vessel that rotates around an axis of rotation, The system comprises a supply unit that supplies a liquid substance to at least one of the rotating containers, The at least one of the rotating containers has an opening formed therein that allows the liquid substance, to which centrifugal force is applied by rotation, to be scattered. The degassing device wherein the rotating shaft extends in line with the central axis of the vacuum vessel.

2. The aforementioned at least one rotating container includes a plurality of rotating containers, The defoaming apparatus according to claim 1, wherein the plurality of rotating containers are arranged at different positions in the direction in which the central axis extends.

3. The vacuum container further comprises an inner circumferential wall provided along the outer circumferential wall, The plurality of rotating containers include a first rotating container and a second rotating container. The defoaming apparatus according to claim 2, wherein the inner circumferential wall is provided in a position that does not come into contact with the liquid substance scattered from the first rotating container, but comes into contact with the liquid substance scattered from the second rotating container.

4. The defoaming apparatus according to claim 3, wherein the inner circumferential wall is positioned at a distance from the outer circumferential wall and is in a non-contact state with the outer circumferential wall.

5. The at least one rotating container is A circular base, Including a circumferential portion extending from the outer peripheral edge of the bottom portion toward the top wall, The vacuum vessel has a cylindrical shape, The degassing apparatus according to any one of claims 1 to 4, wherein the inner diameter of the circumferential portion is 1 / 2 or more of the inner diameter of the outer circumferential wall of the vacuum container.

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