Slurry dispersing apparatus, device and control method thereof, battery production system

Abstract

The application relates to a slurry dispersing device, a battery production system and a control method thereof. In the slurry dispersing process, the slurry can be transported into a buffer body for pre-dispersion; then, the slurry in the buffer cavity is transported into a dispersing mechanism, at this time, at least two kneading rollers can be driven to rotate around their respective axes by a driver, the entering slurry is kneaded, and the agglomerates in the slurry are fully dispersed; the kneaded material can re-enter the buffer body through a reflux pipe for buffer dispersion, so as to realize multi-cycle buffer dispersion and kneading dispersion operation, strengthen the dispersion effect of the slurry, and reduce the agglomeration phenomenon in the slurry. Since the slurry can be cyclically dispersed between the buffer body and the dispersing mechanism, the effective kneading path and the kneading time of the slurry can be prolonged without increasing the size of the dispersing mechanism, so that the dispersion effect and the equipment size can be effectively balanced.

Description

Technical Field

[0001] This application relates to the field of slurry dispersion technology, and in particular to slurry dispersion apparatus, equipment and control methods thereof, and battery production systems. Background Technology

[0002] Slurry contains a certain proportion of solids, giving it a certain viscosity. To reduce agglomeration in the slurry, a dispersing device is generally used. However, traditional dispersing devices are limited by their structural design and generally suffer from poor dispersing effects; to improve dispersing performance, the equipment size needs to be increased, which leads to higher operating costs. Summary of the Invention

[0003] Therefore, it is necessary to provide a slurry dispersion device, equipment and control method thereof, and battery production system that can effectively balance dispersion effect and equipment specifications.

[0004] In a first aspect, this application provides a slurry dispersion apparatus, comprising: a buffer body having a buffer cavity for storing slurry; a dispersion mechanism for receiving slurry output from the buffer cavity, and including a driver and at least two kneading rollers cooperating with each other, the driver being used to drive the kneading rollers to rotate about their respective axes; and a return pipe communicating with the dispersion mechanism for returning the slurry output from the dispersion mechanism to the buffer body.

[0005] The aforementioned slurry dispersion device, during the slurry dispersion process, can transport the slurry to a buffer chamber for pre-dispersion; then, the slurry in the buffer chamber is transported to the dispersion mechanism. At this time, at least two kneading rollers can be driven by a driver to rotate around their respective axes, kneading the incoming slurry and fully dispersing any agglomerates in the slurry. The kneaded material can then re-enter the buffer chamber through a return pipe for further buffering and dispersion, enabling multiple rounds of cyclic buffering and kneading dispersion operations. This enhances the slurry dispersion effect and reduces agglomeration. Because the slurry can circulate between the buffer chamber and the dispersion mechanism, the effective kneading path and kneading time of the slurry can be extended without increasing the rules of the dispersion mechanism, thus effectively balancing dispersion effect and equipment specifications.

[0006] In some embodiments, each kneading roller includes a conveying section, a kneading section, and a counterflow section sequentially distributed along its respective axis. The kneading sections of the kneading rollers cooperate with each other, and the conveying section and the counterflow section are configured to drive the slurry towards the kneading section when the kneading roller rotates about its own axis. With this design, the slurry, driven by the counterflow section, converges in the kneading section for mixing, kneading, and other operations, increasing the kneading time and enhancing the dispersion effect. At the same time, the introduced counterflow section not only enables back mixing of the slurry but also reduces the risk of slurry accumulating at one end of the dispersion mechanism, thereby reducing the volume of dead zones inside the dispersion mechanism and improving space utilization.

[0007] In some embodiments, the kneading section includes a first kneading spiral and a second kneading spiral sequentially distributed along the axial direction of the kneading roller, with the first kneading spiral rotating in the opposite direction to the second kneading spiral. This design allows the axial forces exerted on the slurry by the first and second kneading spirals to at least partially cancel each other out, extending the residence time of the slurry in the kneading section and enhancing the dispersion effect.

[0008] In some embodiments, the conveying section includes a conveying screw, and the countercurrent section includes a countercurrent screw with the opposite rotation direction to the conveying screw. The second kneading screw is closer to the countercurrent screw than the first kneading screw, and the rotation direction of the second kneading screw is the same as that of the countercurrent screw. This design allows the slurry to better converge in the kneading section, further extending the kneading time and enhancing the dispersion effect.

[0009] In some embodiments, the lead of the first kneading screw is greater than the lead of the conveying screw. This design makes the axial conveying capacity of the conveying screw relatively stronger and the radial shearing capacity of the first kneading screw stronger, thereby enabling the incoming slurry to quickly enter the kneading section for effective kneading and dispersion, which is beneficial to balancing dispersion efficiency and effect.

[0010] In some embodiments, the lead of the second kneading screw is greater than that of the reflux screw. This design makes the axial blocking capability of the reflux screw relatively stronger and the radial shearing capability of the second kneading screw stronger, thereby effectively blocking the slurry on the reflux screw and refluxing it back to the kneading section for effective kneading and dispersion. This not only enhances the dispersion effect but also helps to reduce the dead zone volume in the dispersion mechanism.

[0011] In some embodiments, the lead of the conveying screw is greater than that of the reflux screw. This design allows more slurry to be trapped in the kneading section, extending the kneading time and improving the dispersion effect. At the same time, while achieving the same reflux effect, the size of the reflux section can be shortened, reserving more space for slurry conveying and kneading, further improving the dispersion effect and capacity.

[0012] In some embodiments, the height of the protruding threads on the kneading section of the first kneading spiral and / or the second kneading spiral is 30mm to 60mm. This design, by controlling the thread height between 30mm and 60mm, effectively balances the residence time and shear strength of the slurry in the kneading section, which is beneficial for comprehensively improving the dispersion effect.

[0013] In some embodiments, the mating gap between the cooperating kneading sections is denoted as H1, and H1 is 0.5mm to 3mm. This design controls the mating gap H1 between the cooperating kneading sections to be between 0.5mm and 3mm, which helps to effectively balance the slurry throughput and shear strength between the kneading sections.

[0014] In some embodiments, the dispersion mechanism further includes a dispersion shell, with each kneading roller rotatably disposed within the dispersion shell. The minimum gap between the kneading section and the inner wall of the dispersion shell is denoted as H2, where H2 is 0.5mm to 3mm. This design controls the minimum gap H2 between 0.5mm and 3mm, effectively balancing the slurry throughput and shear strength between the kneading section and the inner wall of the dispersion shell, thereby improving the dispersion effect.

[0015] In some embodiments, the slurry dispersion apparatus further includes a pumping device for providing power for the transport of the slurry within the slurry dispersion apparatus. This design, by introducing the pumping device, facilitates stable transport of the slurry within the buffer and dispersion mechanisms, thereby enabling more stable slurry dispersion.

[0016] Secondly, this application provides a slurry dispersion device, which includes: a slurry dispersion apparatus as described in any of the above; and a filtration device for receiving the slurry output from the buffer or dispersion mechanism and filtering the slurry. This design, by introducing a filtration device, allows for the filtration of the slurry to remove agglomerated particles, facilitating the acquisition of a uniformly dispersed slurry product.

[0017] In some embodiments, the filtration device includes a filter housing, a vibration assembly, and a filter assembly disposed within the filter housing. The filter assembly is used to filter the slurry within the filter housing, and the vibration assembly is used to vibrate the slurry at least before and / or during filtration. This design, by introducing the vibration assembly, facilitates vibration filtration, secondary vibration breaks up agglomerates in the slurry, resulting in uniform slurry dispersion. Simultaneously, it also allows the slurry to pass more easily through the filter assembly, reducing the risk of filter clogging and improving filtration efficiency.

[0018] In some embodiments, the filter assembly includes a plurality of filter elements stacked along a predetermined direction, having an inlet side and an outlet side disposed opposite to each other along the predetermined direction. In at least some of the filter elements, the flow area of ​​the filter pores on each filter element decreases layer by layer along the direction from the inlet side to the outlet side. With this design, after the slurry passes through the layers of filter elements, agglomerates of different degrees will be blocked on the different layers of filter elements, which is more conducive to the vibration assembly to vibrate and break up agglomerates of different degrees separately, resulting in a more dispersed slurry after filtration.

[0019] In some embodiments, the filtration device further includes a backwashing assembly for flushing the filter assembly in the opposite direction to the filtration direction. This design allows the backwashing assembly to flush the filter assembly in the opposite direction to the filtration direction, clearing blockages from the filter pores. Simultaneously, a vibration assembly can be used in conjunction with the flushing process to accelerate the clearing of blockages and regenerate the filter assembly.

[0020] Thirdly, this application provides a control method for a slurry dispersion device, employing any of the above-mentioned slurry dispersion devices. The method includes the following steps: controlling the slurry to circulate through a buffer body and a dispersion mechanism; and, provided that the slurry circulation time reaches a preset time, controlling the slurry in the buffer body to enter a filtration device. This design combines the dispersion mechanism and the filtration device, resulting in more uniform slurry dispersion and improved dispersion effect.

[0021] In some embodiments, the step of controlling the slurry in the buffer body to enter the filtration device includes: controlling the slurry in the buffer body to enter the filter shell of the filtration device and causing the slurry to flow through the filter assembly; controlling the vibration assembly to vibrate the filter assembly. This design causes vibration in the slurry during filtration, effectively disrupting the van der Waals forces between particles, breaking up residual agglomerates, and redispersing and mixing the agglomerates residing in the filter assembly back into the slurry, thereby resulting in more uniform slurry dispersion and improved dispersion effect.

[0022] Fourthly, this application provides a battery production system, which includes the slurry dispersion equipment described above. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the slurry dispersion device described in some embodiments of this application.

[0024] Figure 2 This is a schematic diagram of the structure of the dispersing mechanism described in some embodiments of this application.

[0025] Figure 3 This is a schematic diagram of the internal structure of the dispersive mechanism described in some embodiments of this application.

[0026] Figure 4This is a schematic diagram of the structure of two kneading rollers described in some embodiments of this application.

[0027] Figure 5 This is a perspective view of the structure of a single kneading roller as described in some embodiments of this application.

[0028] Figure 6 This is another perspective view of the structure of a single kneading roller described in some embodiments of this application.

[0029] Figure 7 for Figure 6 A cross-sectional view of the structure along the middle AA.

[0030] Figure 8 This is a schematic diagram of the slurry dispersion equipment described in some embodiments of this application.

[0031] Figure 9 This is a schematic diagram of the slurry flow in the slurry dispersion equipment described in some embodiments of this application. Figure 1 .

[0032] Figure 10 This is a schematic diagram of the slurry flow in the slurry dispersion equipment described in some embodiments of this application. Figure 2 .

[0033] Figure 11 This is a schematic diagram of the slurry flow in the slurry dispersion equipment described in some embodiments of this application. Figure 3 .

[0034] Figure 12 This is a schematic diagram of the structure of the filtering device described in some embodiments of this application.

[0035] Figure 13 This is a schematic diagram of the structure of a filter device with a seal as described in some embodiments of this application.

[0036] Figure 14 for Figure 13 Enlarged view of the structure at point B in the middle circle.

[0037] Figure 15 This is a schematic diagram of the structure of a filter device with a protective cover as described in some embodiments of this application.

[0038] Figure 16 This is a schematic diagram of the structure of a filter device with a backwashing component as described in some embodiments of this application.

[0039] Figure 17 The flowchart of the control method for the slurry dispersion equipment described in some embodiments of this application Figure 1 .

[0040] Figure 18The flowchart of the control method for the slurry dispersion equipment described in some embodiments of this application Figure 2 .

[0041] 10. Buffer body; 11. Discharge port; 12. Buffer chamber; 20. Dispersion mechanism; 21. Dispersion shell; 211. Feed end; 212. Discharge end; 22. Driver; 23. Kneading roller; 231. Conveying section; 23a. Conveying screw; 23b. Second rotating shaft; 232. Kneading section; 23c. First kneading screw; 23d. Second kneading screw; 23e. First rotating shaft; 233. Reverse flow section; 23f. Reverse flow screw; 23g. Third rotating shaft section; Y, axis direction; 30, return pipe; 40, pumping equipment; 50, filter device; 51, filter shell; 511, feed inlet; 52, filter assembly; 521, filter element; 522, mounting hole; 523, mounting groove; 524, seal; 525, feed side; 526, discharge side; X, preset direction; 53, vibration assembly; 531, output end; 532, protective cover; 60, unloading equipment; 70, backwashing assembly. Detailed Implementation

[0042] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0043] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0044] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0048] Slurries, due to their inherent solid content, possess a certain degree of viscosity; examples include electronic pastes, electrode materials, and functional coatings. To reduce agglomeration in slurries, dispersion devices are typically used. Traditional dispersion devices usually employ agitation or extrusion using a screw extruder. However, limitations in the structural design of traditional agitation devices or screw extruders result in either insufficient dispersion or overly large dispersion devices, increasing operating costs.

[0049] Based on this, and addressing the problem that traditional dispersion devices cannot effectively balance dispersion effect and equipment specifications, this application provides a slurry dispersion device. During the slurry dispersion process, the slurry is transported to a buffer chamber for pre-dispersion. Then, the slurry in the buffer chamber is transported to a dispersion mechanism. At this point, at least two kneading rollers are driven by a driver to rotate around their respective axes, kneading the incoming slurry and fully dispersing any agglomerates. The kneaded material can then re-enter the buffer chamber through a return pipe for further buffering and dispersion, enabling multiple rounds of cyclic buffering and kneading dispersion operations. This enhances the slurry dispersion effect and reduces agglomeration. Because the slurry can circulate between the buffer chamber and the dispersion mechanism, the effective kneading path and kneading time of the slurry can be extended without increasing the rules of the dispersion mechanism, thus effectively balancing dispersion effect and equipment specifications.

[0050] It should be noted that the slurry dispersion device is applicable to slurries with different solid contents, such as, but not limited to, 40% to 70%. Furthermore, the types of slurries can also be varied, including, but not limited to, slurries made from easily agglomerated nanomaterials such as carbon nanotubes, graphene, and metal oxides; and of course, slurries such as electronic slurries, electrode materials, and functional coatings that require strict dispersion uniformity.

[0051] According to some embodiments of this application, please refer to Figures 1 to 3 This application provides a slurry dispersion apparatus, comprising: a buffer body 10, a dispersion mechanism 20, and a return pipe 30; the dispersion mechanism 20 is used to receive the slurry output from the buffer chamber 12, and includes a driver 22 and at least two cooperating kneading rollers 23, the driver 22 being used to drive the kneading rollers 23 to rotate about their respective axes. The return pipe 30 is connected to the dispersion mechanism 20 and is used to return the slurry output from the dispersion mechanism 20 to the buffer body 10.

[0052] The buffer body 10 refers to a structure with internal space for storing slurry. When slurry is delivered into the buffer body 10, it can disperse within the buffer body 10, achieving a pre-dispersion effect and reducing the probability of particle agglomeration. To further reduce particle deposition in the slurry, the bottom of the buffer body 10 can be designed as a cone-shaped structure, for example, the buffer body 10 is provided with a discharge port 11, which is used to deliver slurry to the dispersion mechanism 20. The flow area in the buffer cavity 12 is smaller closer to the discharge port 11. The slurry in the buffer cavity 12 can be manually added or fed through a feeding device 60, such as a screw conveyor or belt conveyor.

[0053] The structure for conveying slurry from the discharge port 11 to the dispersing mechanism 20 can be varied. For example, the discharge port 11 can be directly connected to the feed end 211 of the dispersing mechanism 20 via a pipeline; or it can be connected to other components, such as a rotor pump, via a pipeline, with the other components connected to the feed end 211 of the dispersing mechanism 20.

[0054] The dispersing mechanism 20 is a device capable of kneading slurry. When the slurry enters the dispersing mechanism 20, at least two cooperating kneading rollers 23 rotate around their respective axes under the drive of the driver 22, causing the slurry to be kneaded between at least two kneading rollers 23. This provides shear force to the particles in the slurry, reducing the probability of agglomeration and improving the dispersion effect. Of course, during kneading and dispersion, some slurry can also be sheared between the inner wall of the dispersing mechanism 20 and the kneading rollers 23. For example, the dispersing mechanism 20 also includes a dispersing shell 21, in which each kneading roller 23 is rotatably disposed. In this way, the slurry can also be subjected to a certain shear force between the kneading rollers 23 and the inner wall of the dispersing shell 21, further improving the dispersion effect.

[0055] The driver 22 refers to the motor that provides power for the rotation of the kneading roller 23. When driving the kneading roller 23, a transmission mechanism can be set between the driver 22 and the kneading roller 23, such as a coupling, gear set, combination of roller and belt, combination of roller and chain, etc. At the same time, a transmission mechanism, such as a gear set, can also be set between the cooperating kneading rollers 23. In this way, when the driver 22 drives one kneading roller 23 to rotate, the other kneading roller 23 can be driven to rotate synchronously through the gear set. Of course, a transmission mechanism can also be set between the cooperating kneading rollers 23. In this case, during kneading, one kneading roller 23 rotates under the drive of the driver 22, driving the slurry into the space between the two kneading rollers 23, thereby driving the other kneading roller 23 to rotate.

[0056] Pressure sensors and temperature probes can also be installed in the dispersion mechanism 20 to monitor the pressure and temperature in the dispersion mechanism 20 so that the dispersion mechanism 20 can work normally.

[0057] Additionally, the return pipe 30 allows the kneaded slurry to be returned to the buffer body 10 for recycling, thereby extending the effective kneading path of the slurry without increasing the rules of the dispersing mechanism 20. In some examples, the overall length of the kneading roller 23 is shortened by 20% to 30% compared to the traditional structure, and after space optimization, the equipment footprint is reduced to 60% of the original.

[0058] With this design, the slurry can be circulated and dispersed between the buffer 10 and the dispersion mechanism 20. Therefore, without increasing the rules of the dispersion mechanism 20, the effective kneading path and kneading time of the slurry can be extended, thus effectively balancing the dispersion effect and equipment specifications.

[0059] Optionally, according to some embodiments of this application, please refer to Figures 3 to 5 Each kneading roller 23 includes a conveying section 231, a kneading section 232, and a counterflow section 233 distributed sequentially along its respective axial direction Y. The kneading sections 232 of the kneading rollers 23 cooperate with each other. The conveying section 231 and the counterflow section 233 are both configured to drive the slurry towards the kneading section 232 when the kneading roller 23 rotates around its own axis.

[0060] When the slurry enters the dispersion mechanism 20, the kneading roller 23 rotates around its own axis under the drive of the driver 22, so that the slurry is axially conveyed towards the kneading section 232 under the action of the conveying section 231, thereby ensuring that the slurry reaches between at least two kneading sections 232. Since each kneading section 232 rotates around its own axis, the slurry can be effectively squeezed and kneaded between the kneading sections 232, providing effective shear force to the particles in the slurry and reducing the probability of agglomeration in the slurry.

[0061] Because a countercurrent section 233 is located on the side of the kneading section 232 furthest from the conveying section 231, the slurry reaching the kneading section 232 is blocked by the countercurrent section 233, slowing down the axial conveying speed of the slurry. Driven by the countercurrent section 233, the slurry flows in the opposite direction and converges in the kneading section 232 for mixing and kneading, increasing the kneading time and enhancing the dispersion effect. The introduced countercurrent section 233 not only achieves back-mixing of the slurry but also reduces the risk of slurry accumulation at one end of the dispersion mechanism 20, thereby reducing the volume of the dead zone inside the dispersion mechanism 20 and improving space utilization. For example, the volume of the dead zone inside the dispersion mechanism 20 can be controlled to less than 5% of the total volume. Simultaneously, reducing the risk of slurry accumulation at one end of the dispersion mechanism 20 also reduces the risk of blockage.

[0062] Furthermore, as the kneading operation proceeds, more and more slurry converges in the kneading section 232 under the opposite drive of the conveying section 231 and the counterflow section 233, so that the newly input slurry can be radially pushed out of the kneading section 232, realizing automatic discharge of the kneaded slurry.

[0063] In the same kneading roller 23, the conveying section 231, the kneading section 232, and the reverse flow section 233 are distributed sequentially along the axial direction Y. This can be understood as the conveying section 231 and the reverse flow section 233 being located on opposite sides of the kneading section 232 along the axial direction Y. The conveying section 231 and the reverse flow section 233 can be tightly connected to the kneading section 232, or they can maintain a certain gap. Of course, other structures can also be provided between the conveying section 231 and the kneading section 232, and between the reverse flow section 233 and the kneading section 232. In some specific examples, the conveying section 231, the kneading section 232, and the reverse flow section 233 are connected sequentially.

[0064] Both the conveying section 231 and the countercurrent section 233 have the function of conveying the slurry along the axial direction Y, but as the kneading roller 23 rotates, the conveying directions of the slurry are opposite. To achieve conveying in opposite directions, the structures of the conveying section 231 and the countercurrent section 233 can be designed in various ways, such as: both can be designed as spiral structures with opposite rotation directions; or, both can be designed as axial flow impeller structures with opposite thrust; or, etc.

[0065] To achieve effective kneading, the kneading section 232 can be designed in various ways. For example, a spiral structure can be provided on the surface of the kneading section 232; or, a structure such as protrusions or oblique teeth can be provided on the surface of the kneading section 232; or, the kneading section 232 can be designed as a cylindrical structure without any protrusions on its surface.

[0066] It should also be noted that the dimensions of the conveying section 231, kneading section 232, and reversing section 233 along the axial direction Y can be equal or unequal. For example, the dimension of the kneading section 232 along the axial direction Y is larger than that of the conveying section 231, and the dimension of the conveying section 231 along the axial direction Y is larger than that of the reversing section 233. In some specific examples, the ratio of the dimension L2 of the conveying section 231 along the axial direction Y, the dimension L3 of the kneading section 232 along the axial direction Y, and the dimension L1 of the reversing section 233 along the axial direction Y can be 2:4:1. See reference for details. Figure 6 .

[0067] With this design, the slurry is driven by the counterflow section 233 to converge in the kneading section 232 for mixing and kneading, which increases the kneading time and enhances the dispersion effect. At the same time, the introduced counterflow section 233 can not only realize the back mixing of the slurry, but also reduce the risk of slurry accumulating at one end of the dispersion mechanism 20, thereby reducing the volume of the dead zone inside the dispersion mechanism 20 and improving the space utilization rate.

[0068] Optionally, according to some embodiments of this application, please refer to Figure 5The kneading section 232 includes a first kneading spiral 23c and a second kneading spiral 23d that are sequentially distributed along the axial direction Y of the kneading roller 23. The rotation direction of the first kneading spiral 23c is opposite to that of the second kneading spiral 23d.

[0069] When the slurry enters the kneading section 232, the rotation of the first kneading screw 23c not only drives the slurry to move along the axial direction Y, but also exerts a shear force on the slurry perpendicular to the axial direction Y. Simultaneously, the rotation of the second kneading screw 23d also drives the slurry to move along the axial direction Y, and also exerts a shear force on the slurry perpendicular to the axial direction Y. Since the first kneading screw 23c and the second kneading screw 23d rotate in opposite directions, the axial forces exerted on the slurry by the first kneading screw 23c and the second kneading screw 23d can at least partially cancel each other out, prolonging the residence time of the slurry in the kneading section 232 and enhancing the dispersion effect.

[0070] During the kneading process, the first kneading spirals 23c of the two kneading sections 232 can be staggered, and the second kneading sections 232 of the two kneading sections 232 can also be staggered to knead the slurry. The stagger angle between the two kneading sections 232 can be designed in various ways, such as, but not limited to, 45°~90°. Within the same kneading section 232, the first kneading spiral 23c and the second kneading spiral 23d can be connected or not. For specific examples, please refer to [reference needed]. Figure 5 The first kneading screw 23c is closer to the conveying section 231 than the second kneading screw 23d. The end of the first kneading screw 23c away from the conveying section 231 is connected to the end of the second kneading screw 23d away from the backflow section 233.

[0071] When the first kneading spiral 23c and the second kneading spiral 23d are connected, during the fabrication of the structure, spiral structures can be set at both ends of the kneading segment 232 towards the middle position with different directions of rotation. When the two spiral structures intersect at the middle position of the kneading segment 232, they both stop extending spirally. At this time, the two connected spiral structures are the first kneading spiral 23c and the second kneading spiral 23d, respectively. Of course, the fabrication methods of the first kneading spiral 23c and the second kneading spiral 23d are not limited to the methods listed above. For example, they can be set to extend spirally from the middle position of the kneading segment 232 towards both ends.

[0072] In the same kneading section 232, there can be one or more first kneading spirals 23c and second kneading spirals 23d. For example, there can be multiple first kneading spirals 23c and second kneading spirals 23d, arranged in a one-to-one configuration. The first kneading spirals 23c and second kneading spirals 23d can be combined to form a spiral combination, which can be distributed at intervals around the axis of the kneading roller 23.

[0073] Meanwhile, the spiral extension lengths of the first kneading spiral 23c and the second kneading spiral 23d can be designed in various ways. For example, both the first kneading spiral 23c and the second kneading spiral 23d can be lead spirals of 1 / 8 to 1, such as: 1 / 8 lead spiral, 1 / 6 lead spiral, 1 / 5 lead spiral, 1 / 4 lead spiral, 1 / 3 lead spiral, 1 / 2 lead spiral, or 1 lead spiral, etc. Here, lead refers to the distance traveled by the spiral in one complete rotation (360°). Furthermore, the lead of the first kneading spiral 23c and the lead of the second kneading spiral 23d can be equal or unequal.

[0074] In some examples, each kneading section 232 may include a first rotating shaft portion 23e, with the conveying section 231 and the reflux section 233 respectively connected to opposite ends of the first rotating shaft portion 23e, and the first kneading spiral 23c and the second kneading spiral 23d disposed on the surface of the first rotating shaft portion 23e.

[0075] With this design, the axial forces of the first kneading screw 23c and the second kneading screw 23d on the slurry can at least partially cancel each other out, prolonging the residence time of the slurry in the kneading section 232 and enhancing the dispersion effect.

[0076] Optionally, according to some embodiments of this application, please refer to Figure 5 The conveying section 231 includes a conveying screw 23a, and the reverse flow section 233 includes a reverse flow screw 23f with the opposite direction of rotation to the conveying screw 23a. The second kneading screw 23d is closer to the reverse flow screw 23f than the first kneading screw 23c, and the direction of rotation of the second kneading screw 23d is the same as that of the reverse flow screw 23f.

[0077] It is known that the rotation direction of the first kneading screw 23c is the same as that of the conveying screw 23a, and the rotation direction of the second kneading screw 23d is the same as that of the countercurrent screw 23f. Thus, after the slurry is conveyed to the first kneading screw 23c under the action of the conveying screw 23a, it can continue forward under the action of the first kneading screw 23c. Since the rotation direction of the second kneading screw 23d is the same as that of the countercurrent screw 23f, the forward conveying speed of the slurry can be slowed down under the action of the second kneading screw 23d, so that the speed of the slurry reaching the countercurrent screw 23f is relatively small. This allows the countercurrent screw 23f to better block the forward movement of the slurry and also allows this portion of the slurry to be better backmixed into the kneading section 232.

[0078] In this design, the lead of the first kneading screw 23c can be greater than or equal to the lead of the conveying screw 23a, or it can be less than the lead of the conveying screw 23a. Similarly, the lead of the second kneading screw 23d can be greater than or equal to the lead of the reflux screw 23f, or it can be less than the lead of the reflux screw 23f. Furthermore, the first kneading screw 23c can be connected to the conveying screw 23a, or it can be disconnected; the second kneading screw 23d can be connected to the reflux screw 23f, or it can be disconnected. In some specific examples, the conveying screw 23a, the first kneading screw 23c, the second kneading screw 23d, and the reflux screw 23f are connected sequentially.

[0079] Furthermore, the number of conveying screws 23a and counterflow screws 23f can be one or more. When there are multiple conveying screws 23a and counterflow screws 23f, each conveying screw 23a and counterflow screw 23f can be distributed at intervals around the axis of the kneading roller 23.

[0080] In some examples, the kneading section 232 may also include a first rotating shaft portion 23e, the conveying section 231 may also include a second rotating shaft portion 23b, and the reflux section 233 may also include a third rotating shaft portion 23g. The second rotating shaft portion 23b, the first rotating shaft portion 23e, and the third rotating shaft portion 23g are arranged coaxially in sequence. The conveying spiral 23a is disposed on the surface of the second rotating shaft portion 23b, and the reflux spiral 23f is disposed on the surface of the third rotating shaft portion 23g.

[0081] This design allows the slurry to better converge in the kneading section 232, further extending the kneading time and enhancing the dispersion effect.

[0082] Optionally, according to some embodiments of this application, please refer to Figure 5 The lead of the first kneading screw 23c is greater than the lead of the conveying screw 23a.

[0083] Lead refers to the distance the screw travels in one complete revolution. The larger the lead, the weaker the axial thrust and the stronger the radial shear force. Therefore, in this embodiment, the lead of the first kneading screw 23c is greater than the lead of the conveying screw 23a, making the axial conveying capacity of the conveying screw 23a relatively stronger and the radial shearing capacity of the first kneading screw 23c stronger, thereby enabling the incoming slurry to quickly enter the kneading section 232 for effective kneading and dispersion.

[0084] The specific relationship between the lead of the first kneading screw 23c and the lead of the conveying screw 23a can be determined according to the actual dispersion process and is not specifically limited here. It is easy to understand that the fact that the lead of the first kneading screw 23c is greater than the lead of the conveying screw 23a does not mean that the dimension of the first kneading screw 23c along the axial direction Y is greater than the dimension of the conveying screw 23a along the axial direction Y. Therefore, the dimensions of the first kneading screw 23c and the conveying screw 23a in the axial direction Y are related not only to their leads but also to the actual number of turns of the first kneading screw 23c and the conveying screw 23a. Of course, in some examples, the dimension of the first kneading screw 23c along the axial direction Y can be greater than or equal to the dimension of the conveying screw 23a along the axial direction Y.

[0085] This design makes the axial conveying capacity of the conveying screw 23a relatively stronger and the radial shearing capacity of the first kneading screw 23c stronger, so that the incoming slurry can quickly enter the kneading section 232 for effective kneading and dispersion, which is conducive to balancing dispersion efficiency and effect.

[0086] Optionally, according to some embodiments of this application, please refer to Figure 5 The lead of the second kneading screw 23d is greater than the lead of the reflux screw 23f.

[0087] The lead of the second kneading screw 23d is greater than that of the reflux screw 23f, which makes the axial resistance of the reflux screw 23f relatively stronger and the radial shearing capacity of the second kneading screw 23d stronger, so that the slurry on the reflux screw 23f can be effectively blocked and refluxed back into the kneading section 232.

[0088] The specific relationship between the lead of the second kneading spiral 23d and the lead of the reflux spiral 23f can be determined according to the actual dispersion process and is not specifically limited here. Similarly, it is easy to understand that the fact that the lead of the second kneading spiral 23d is greater than the lead of the reflux spiral 23f does not mean that the dimension of the second kneading spiral 23d along the axial direction Y is greater than the dimension of the reflux spiral 23f along the axial direction Y. Therefore, the dimensions of the second kneading spiral 23d and the reflux spiral 23f along the axial direction Y are related not only to the lead but also to the actual number of turns of the second kneading spiral 23d and the reflux spiral 23f. Of course, in some examples, the dimension of the second kneading spiral 23d along the axial direction Y can be greater than or equal to the dimension of the reflux spiral 23f along the axial direction Y.

[0089] This design makes the axial blocking ability of the reflux spiral 23f relatively stronger and the radial shearing ability of the second kneading spiral 23d stronger, so that the slurry is effectively blocked on the reflux spiral 23f and flows back to the kneading section 232 for effective kneading and dispersion. This not only enhances the dispersion effect, but also helps to reduce the dead zone volume in the dispersion mechanism 20.

[0090] Optionally, according to some embodiments of this application, please refer to Figure 5 The lead of the conveying screw 23a is greater than the lead of the counterflow screw 23f.

[0091] It can be seen that the axial force exerted by the countercurrent screw 23f on the slurry can be greater than the axial force exerted by the conveying screw 23a on the slurry, allowing more slurry to be trapped in the kneading section 232, thus prolonging the kneading time and improving the dispersion effect. Simultaneously, since the axial force exerted by the countercurrent screw 23f on the slurry can be greater than the axial force exerted by the conveying screw 23a on the slurry, in some examples, please refer to... Figure 6 Furthermore, the dimension L1 of the reflux screw 23f in the axial direction Y can be designed to be smaller than the dimension L2 of the conveying screw 23a in the axial direction Y. In this way, the relatively short reflux section 233 can be used to reserve more space for the conveying and kneading of the slurry while achieving an effective reflux effect, thereby further improving the dispersion effect and capacity.

[0092] This design allows more slurry to be trapped in the kneading section 232, extending the kneading time and improving the dispersion effect. At the same time, while achieving the same backflow effect, the size of the backflow section 233 can be shortened, leaving more space for slurry delivery and kneading, further improving the dispersion effect and capacity.

[0093] According to some embodiments of this application, optionally, the thread height of the first kneading spiral 23c and / or the second kneading spiral 23d protruding on the kneading section 232 is 30mm to 60mm.

[0094] The height of the raised thread on the pinching section 232 of the first pinching screw 23c and / or the second pinching screw 23d can be understood as: the height of the raised thread formed by the spiral extension of the first pinching screw 23c and / or the second pinching screw 23d on the pinching section 232. Of course, it can also be understood as the depth of the thread groove on the pinching section 232.

[0095] In some examples, please refer to Figure 5 The kneading section 232 may further include a first rotating shaft portion 23e. Both the first kneading spiral 23c and the second kneading spiral 23d are disposed on the surface of the first rotating shaft portion 23e. In this case, the thread height can be the radius D1 of the largest circle on the first kneading spiral 23c or the second kneading spiral 23d minus the radius D2 of the first rotating shaft portion 23e. For details, please refer to [reference needed]. Figure 7 The diameter of the largest circle on the first kneading screw 23c or the second kneading screw 23d can be designed in various ways, for example, its diameter can be, but is not limited to, 220mm~260mm.

[0096] It is known that a higher thread height indicates a deeper thread groove, making it easier to fill with more material, but it will have a certain impact on the shear force. Therefore, in this embodiment, the thread height is controlled between 30mm and 60mm, for example, but not limited to 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, etc.

[0097] This design, which controls the thread height between 30mm and 60mm, effectively balances the residence time and shear strength of the slurry in the kneading section 232, thus improving the overall dispersion effect.

[0098] Optionally, according to some embodiments of this application, please refer to Figure 3 The gap between the kneading sections 232 that cooperate with each other is denoted as H1, and H1 is 0.5mm~3mm.

[0099] It can be seen that the fit gap H1 between the mating sections 232 can be between 0.5mm and 3mm, for example, but not limited to 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, etc.

[0100] This design controls the gap H1 between the kneading sections 232 to be between 0.5mm and 3mm, which effectively balances the amount of slurry passing through the kneading sections 232 and the shear strength.

[0101] Optionally, according to some embodiments of this application, please refer to Figure 3 The dispersing mechanism 20 also includes a dispersing shell 21, and each kneading roller 23 is rotatably disposed inside the dispersing shell 21. The minimum value of the gap between the kneading section 232 and the inner wall of the dispersing shell 21 is denoted as H2, where H2 is 0.5mm to 3mm.

[0102] The dispersion shell 21 refers to the shell structure of the dispersion mechanism 20, on which an inlet end 211 and an outlet end 212 can be provided. The inlet end 211 can be connected to the buffer body 10, and the outlet end 212 can also be connected to the buffer body 10. When the slurry enters from the inlet end 211, it can be conveyed and squeezed along the axial direction Y under the action of the kneading roller 23; the kneaded and dispersed slurry can be discharged outward from the outlet end 212 and flow back into the buffer body 10.

[0103] The feed end 211 and the discharge end 212 can be located in various positions on the dispersion shell 21, such as on the side, end face, or top of the dispersion shell 21. In some specific examples, both the feed end 211 and the discharge end 212 are located on one side of the kneading roller 23 along the radial direction. The feed end 211 corresponds to the conveying section 231 of the kneading roller 23, and the discharge end 212 corresponds to the counterflow section 233 of the kneading roller 23.

[0104] The kneading roller 23 is in the dispersion shell 21, and it needs to maintain a certain gap with the dispersion shell 21. This gap can affect the amount of slurry passing between the kneading roller 23 and the inner wall of the dispersion shell 21; it also affects the shearing effect of the kneading roller 23 in this gap.

[0105] Therefore, the minimum gap H2 is controlled between 0.5mm and 3mm, for example, but not limited to 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, etc.

[0106] This design controls the minimum gap H2 between 0.5mm and 3mm, which effectively balances the slurry throughput and shear strength between the kneading section 232 and the inner wall of the dispersion shell 21, thereby improving the dispersion effect.

[0107] Optionally, according to some embodiments of this application, please refer to Figure 1 The slurry dispersion device also includes a pumping device 40, which provides power for conveying the slurry in the slurry dispersion device.

[0108] Pumping equipment 40 refers to equipment that can drive slurry to flow between dispersion mechanism 20 and buffer body 10, which may be, but is not limited to, rotary pump, screw pump, slurry pump, etc.

[0109] In some examples, the pumping device 40 may be a rotary pump, which may employ a wear-resistant silicon carbide mechanical seal and has a flow rate adjustment range of 10 L / min to 800 L / min. Simultaneously, the buffer body 10 can be connected to the dispersing mechanism 20 via the rotary pump. To improve the sealing between the devices, exemplarily, the buffer body 10 can be sealed to the inlet end of the rotary pump via a threaded pipe fitting; the outlet end of the rotary pump is then connected to the dispersing mechanism 20 via a flange seal.

[0110] This design, with the introduction of pumping equipment 40, facilitates the stable transport of slurry within the buffer body 10 and the dispersion mechanism 20, thereby making the dispersion of the slurry more stable.

[0111] According to some embodiments of this application, please refer to Figure 8 This application provides a slurry dispersion device, which includes: a filtration device 50 and a slurry dispersion device as described above; the filtration device 50 is used to receive the slurry output from the buffer body 10 or the dispersion mechanism 20 and to filter the slurry.

[0112] The filtration device 50 is a device capable of filtering slurry, removing agglomerates present in the slurry to obtain a more uniformly dispersed slurry product. The filtration device 50 can receive slurry output from the buffer chamber 10 or the dispersion mechanism 20. The slurry in the buffer chamber 12 can be fed manually or via the feeding device 60; details can be found in [reference needed]. Figure 9 .

[0113] When the filter device 50 receives the slurry output from the buffer 10, the filter device 50 can discharge the filtered slurry. For details, please refer to [reference needed]. Figure 9 Alternatively, the filtered slurry can be returned to the buffer 10. For details, please refer to [reference needed]. Figure 10 The filtered slurry can also be conveyed to the dispersion mechanism 20. When the filter device 50 can receive the slurry output from the dispersion mechanism 20, please refer to... Figure 11 The discharge end of the filter device 50 can be connected to the buffer body 10, so that the slurry can flow from the buffer body 10 into the dispersion mechanism 20 for kneading; the kneaded slurry enters the filter device 50 for filtration; the filtered slurry can be returned to the buffer body 10.

[0114] For specific examples, please refer to Figure 8 and Figure 9 The buffer body 10 is equipped with a discharge port 11, which can be controlled to connect to both the dispersion mechanism 20 and the filter device 50. During the dispersion process, the discharge port 11 can be controlled to connect to the dispersion mechanism 20 and disconnect from the filter device 50, allowing the slurry to circulate between the buffer body 10 and the dispersion mechanism 20. After a period of circulation, the discharge port 11 can be controlled to disconnect from the dispersion mechanism 20 and connect to the filter device 50, allowing the kneaded slurry to flow into the filter device 50 for filtration. This design improves the dispersion effect through the coordinated operation of mechanical shear dispersion and filtration dispersion. One discharge port 11 can be provided, selectively connected to both the dispersion mechanism 20 and the filter device 50 via control equipment. Alternatively, two discharge ports 11 can be provided, with one connected to the dispersion mechanism 20 and the other connected to the filter device 50.

[0115] The circulation time between the buffer body 10 and the dispersion mechanism 20 can be determined according to the actual process, such as, but not limited to, 20 min to 60 min. Meanwhile, the structure of the filtration device 50 can have various designs, such as, but not limited to, plate filters, cartridge filters, etc.

[0116] In addition, the slurry dispersion equipment can be equipped with multiple safety measures. For example, it can include overload protection components to ensure electrical safety. Electrical interfaces in the slurry dispersion equipment can also meet IP65 protection standards. Furthermore, the equipment can include safety interlocks. When the operating parameters exceed set values, the safety interlocks can control the equipment to stop operating. For instance, if the pressure or temperature in the filter device 50 exceeds limits, the filter device 50 can be shut down.

[0117] This design incorporates a filtration device 50, which can filter the slurry to remove agglomerated particles, thus facilitating the acquisition of a uniformly dispersed slurry product.

[0118] Optionally, according to some embodiments of this application, please refer to Figure 12 The filtration device 50 includes a filter housing 51, a vibration assembly 53, and a filter assembly 52 disposed within the filter housing 51. The filter assembly 52 is used to filter the slurry within the filter housing 51, and the vibration assembly 53 is used to vibrate the slurry at least before and / or during filtration.

[0119] The filter assembly 52 refers to the device that filters the slurry entering the filter housing 51. Its structure can have various designs, such as a plate filter assembly 52 or a cylindrical filter assembly 52. ​​The vibration assembly 53 refers to the device that vibrates the slurry before and / or during the filtration process. Its structure can also have various designs. For example, the vibration assembly 53 can be designed as a combination of a motor and a cam, using the cam to intermittently strike the filter housing 51 or the filter assembly 52 to create a vibration effect on the slurry; or, the vibration assembly 53 can be designed as an ultrasonic transducer.

[0120] After the slurry enters the filter housing 51, the vibration component 53 vibrates the slurry, causing secondary breakup of any remaining agglomerates, resulting in more uniform slurry dispersion and stable passage through the filter assembly 52. ​​When the vibration component 53 is an ultrasonic transducer, its output end 531 can be positioned in various ways, such as being inserted into the slurry before filtration or embedded in the filter assembly 52, vibrating the filter assembly 52 to break up the slurry. This provides effective ultrasonic vibration not only for the slurry before filtration but also for the slurry during and after filtration. Furthermore, the number of ultrasonic transducers can be one or multiple. The ultrasonic transducers in the filter device 50 can be designed as detachable structures for easy maintenance and cleaning.

[0121] In some examples, the filter assembly 52 has a through mounting hole 522, and the output end 531 of the vibration assembly 53 passes through the mounting hole 522, so that the vibration assembly 53 is stably embedded in the filter assembly 52. ​​In this way, the vibration of the filter assembly 52 can break up the slurry and disperse it evenly; at the same time, it can also make the slurry pass through the filter assembly 52 more easily, reducing the risk of filter clogging and improving filtration efficiency. In addition, the vibration of the vibration assembly 53 can be transmitted to the surface of the filter assembly 52 through mechanical coupling to generate micro-vibrations, such as micro-vibrations with an amplitude of 1μm~15μm, which effectively breaks the van der Waals forces between particles, causing the agglomerated particles (e.g., particles with a size >10μm) residing at the edge of the filter pores to redisperse and mix in the slurry.

[0122] To reduce the chance of ultrasonic energy leakage, a sealing structure can be provided between the vibration assembly 53 and the filter assembly 52. ​​For example: Please refer to... Figure 13 and Figure 14 The filter assembly 52 has a mounting groove 523, which is circumferentially located around the mounting hole 522. A seal 524 is disposed within the mounting groove 523 and seals the area between the filter assembly 52 and the vibration assembly 53. This mounting groove 523 stabilizes the seal 524 between the filter assembly 52 and the vibration assembly 53, improving the seal and reducing the likelihood of ultrasonic energy leakage between them. For example, in some examples, during operation, the seal 524 ensures that ultrasonic energy is concentrated on the filter assembly 52, reducing energy loss by approximately 10% to 15%, thereby improving filtration efficiency. It also reduces the likelihood of slurry leakage into the mounting hole 522.

[0123] To reduce the impact of the slurry entering the filter housing 51 on the vibration assembly 53, please refer to... Figure 15 The filter device 50 may also include a protective cover 532, which is located on the side of the filter assembly 52 facing the feed inlet 511 of the filter housing 51 and is fitted over the vibration assembly 53. The protective cover 532 may be detachably connected to the vibration assembly 53 or to the filter assembly 52.

[0124] In some examples, the discharge port 11 of the buffer body 10 is controlled to be connected to both the dispersion mechanism 20 and the inlet 511 of the filter shell 51. This allows the discharge port 11 to be disconnected from the dispersion mechanism 20 and connected to the inlet 511 of the filter shell 51 after the slurry has circulated between the buffer body 10 and the dispersion mechanism 20 for a period of time. This allows the kneaded slurry to enter the filter shell 51 for vibration filtration. This design, utilizing the synergistic effect of kneading dispersion and vibration filtration, results in more uniform slurry dispersion and a better dispersion effect.

[0125] This design, with the introduction of the vibration component 53, facilitates vibration filtration, which breaks up agglomerates in the slurry through secondary vibration, resulting in uniform slurry dispersion. At the same time, it also makes it easier for the slurry to pass through the filter component 52, reducing the risk of filter clogging and improving filtration efficiency.

[0126] Optionally, according to some embodiments of this application, please refer to Figure 12 The filter assembly 52 includes a plurality of filter elements 521 stacked along a preset direction X, and has an inlet side 525 and an outlet side 526 disposed opposite to each other along the preset direction X. In at least some of the filter elements 521, the flow area of ​​the filter holes on each filter element 521 decreases layer by layer along the direction from the inlet side 525 to the outlet side 526.

[0127] The feed side 525 of the filter assembly 52 refers to the side where the slurry is prepared to flow through the filter assembly 52 for filtration, and the discharge side 526 of the filter assembly 52 refers to the side where the filtered slurry leaves the filter assembly 52. ​​When the filter assembly 52 is a plate filter assembly 52, the feed side 525 and the discharge side 526 are located on both sides of the filter assembly 52 along its own thickness direction, and the preset direction X is the thickness direction of the filter assembly 52. ​​When the filter assembly 52 is a cylindrical filter assembly 52, the feed side 525 and the discharge side 526 can be located inside and outside the filter assembly 52, respectively, and the preset direction X can be the radial direction of the filter assembly 52.

[0128] In the filter assembly 52, multiple filter elements 521 are stacked along a preset direction X. Adjacent filter elements 521 can be tightly fitted together or have a certain gap between them. In some specific examples, the filter elements 521 are stacked together and fixed together by sintering.

[0129] As the slurry flows sequentially through the filter assembly 52 from the feed side 525 to the discharge side 526, it is subjected to vibration by the vibration assembly 53, accelerating the breaking up of residual agglomerates. Simultaneously, the generated vibration also accelerates the passage of the slurry through the filter pores of the filter element 521. Since the filter pores of at least some of the filter elements 521 gradually decrease in size, after the slurry passes through layers of filter elements 521, agglomerates of varying degrees are blocked on different layers of filter elements 521. This makes it more advantageous for the vibration assembly 53 to vibrate and break up agglomerates of different degrees separately, resulting in a more dispersed filtered slurry.

[0130] In this context, the flow area of ​​the filter pores in filter element 521 can be understood as the pore area of ​​the filter pores. The shape of the filter pores can be designed in various ways, such as, but not limited to, circular, square, elliptical, and of course, irregular shapes. When the shape of the filter pores is circular, the pore diameter of the filter pores on each filter element 521 can be progressively reduced along the direction from the feed side 525 to the discharge side 526. The specific pore diameter of the filter pores can be designed in various ways, such as, but not limited to, 0.1μm to 100μm. In some examples, taking three filter elements 521 as an example, along the direction from the feed side 525 to the discharge side 526, the pore diameter of the filter pores in the first layer of filter element 521 is 100μm; the pore diameter of the filter pores in the second layer of filter element 521 is 50μm; and the pore diameter of the filter pores in the third layer of filter element 521 is 25μm.

[0131] With this design, after the slurry passes through the layers of filter elements 521, agglomerates of different degrees will be blocked on the different layers of filter elements 521. This is more conducive to the vibration component 53 to vibrate and break up agglomerates of different degrees separately, so that the filtered slurry is more dispersed.

[0132] Optionally, according to some embodiments of this application, please refer to Figure 16 The filter device 50 also includes a backwashing assembly 70, which is used to rinse the filter assembly 52 in the opposite direction to the filtration direction.

[0133] The filtration direction refers to the flow direction of the slurry during filtration on the filter assembly 52, which can also be understood as the direction from the feed side 525 of the filter assembly 52 to the discharge side 526. During the filtration process, some slurry will inevitably clog the filter holes of the filter assembly 52, affecting the filtration effect and the service life of the filter assembly 52.

[0134] Therefore, the filter assembly 52 can be flushed in the opposite direction to the filtration direction using the backwashing component 70 to remove blockages in the filter pores. Simultaneously, the vibration component 53 can be used in conjunction with the backwashing to accelerate the clearing of blockages in the filter assembly 52, thus regenerating the filter assembly 52. ​​For example, when the pressure difference between the two sides of the filter assembly 52 reaches a set threshold, such as 0.1 MPa to 0.3 MPa, the backwashing component 70 can be activated to flush the filter assembly 52.

[0135] The backwashing component 70 can have various designs, such as a nozzle structure with the nozzle facing the discharge side 526 of the filter component 52; or a pipe structure with one end connected to the discharge side 526 of the filter component 52 and the other end connected to a water source.

[0136] In some examples, the filter assembly 52 includes a plurality of filter elements 521 stacked along a preset direction X, and has an inlet side 525 and an outlet side 526 disposed opposite to each other along the preset direction X. In at least some of the filter elements 521, the flow area of ​​the filter holes on each filter element 521 decreases layer by layer along the direction from the inlet side 525 to the outlet side 526, so that the backwashing assembly 70 can flush the outlet side 526 of the filter assembly 52. ​​Since the filter holes of the filter elements 521 decrease layer by layer, it is easier to flush away the clogging agglomerates during backwashing, thereby improving the backwashing efficiency.

[0137] This design allows the filter assembly 52 to be flushed in the opposite direction to the filtration direction via the backwashing component 70, clearing blockages from the filter pores. Simultaneously, the vibration component 53 can be used in conjunction with the flushing process to accelerate the clearing of blockages from the filter assembly 52, thus regenerating the filter assembly 52.

[0138] According to some embodiments of this application, please refer to Figure 17 This application provides a control method for a slurry dispersion device, using any of the above-mentioned slurry dispersion devices, and the method includes the following steps:

[0139] S100 controls the slurry to circulate through the buffer body 10 and the dispersion mechanism 20.

[0140] S200: Under the premise that the slurry circulation time reaches the preset time, control the slurry in the buffer body 10 to enter the filter device 50.

[0141] In step S100, the slurry can be controlled to flow from the buffer body 10 into the dispersion mechanism 20, where the dispersion mechanism 20 kneads and disperses the slurry. The kneaded slurry can then flow back from the dispersion mechanism 20 to the buffer body 10, and this cycle repeats, allowing the slurry to undergo buffering and dispersion, as well as kneading and dispersion, in the buffer body 10 and the dispersion mechanism 20, thereby reducing the probability of agglomeration in the slurry and improving the dispersion effect. During the kneading process, the rotational speed of the kneading roller 23 can be set in various ways, for example, but not limited to 200 rpm to 800 rpm.

[0142] When the slurry circulates between the buffer body 10 and the dispersion mechanism 20 for a preset time, the slurry in the buffer body 10 can be controlled to enter the filtration device 50 for filtration. In step S200, the buffer body 10 and the dispersion mechanism 20 can be disconnected simultaneously, so that the slurry in the buffer body 10 no longer flows into the dispersion mechanism 20.

[0143] Additionally, step S200 may further include controlling the vibration component 53 to perform ultrasonic vibration on the filter component 52, wherein the filter device 50 includes the filter component 52 and the vibration component 53. Simultaneously, the operating frequency of the vibration component 53 is adjustable from 20kHz to 80kHz, and the power density is controlled at 0.5W / cm². 2 ~2.0W / cm 2 In this way, a uniform distribution of the standing wave field is achieved through an impedance matching network.

[0144] This design combines the dispersing mechanism 20 with the filtration device 50, resulting in more uniform dispersion of the slurry and improved dispersion effect.

[0145] Optionally, according to some embodiments of this application, please refer to Figure 18 S200, the step of controlling the slurry in the buffer body 10 to enter the filter device 50 includes:

[0146] S210, control the slurry in the buffer body 10 to enter the filter shell 51 of the filter device 50, and make the slurry flow through the filter assembly 52.

[0147] S220, control the vibration component 53 to vibrate the filter component 52.

[0148] Therefore, when the slurry entering the filter housing 51 flows through the filter assembly 52, the vibration assembly 53 can vibrate the filter assembly 52 to vibrate the slurry in the filter, effectively destroying the van der Waals forces between particles, breaking up the remaining agglomerates, and causing the agglomerates residing in the filter assembly 52 to be redispersed and mixed in the slurry, thereby making the slurry more uniformly dispersed.

[0149] In step S220, the vibration component 53 can be an ultrasonic transducer, which can perform ultrasonic vibration on the filter component 52. The execution order of steps S210 and S220 is not limited. For example, step S210 can be executed first, followed by step S220; or step S220 can be executed earlier, keeping the vibration component 53 in a working state, and then step S210 can be executed, etc.

[0150] This design causes vibration in the slurry during filtration, effectively disrupting the van der Waals forces between particles, breaking up residual agglomerates, and allowing the agglomerates residing in the filter element 52 to redisperse and mix in the slurry, thereby making the slurry dispersion more uniform and improving the dispersion effect.

[0151] According to some embodiments of this application, this application provides a battery production system, which includes the slurry dispersion equipment of any of the above.

[0152] According to some embodiments of this application, this application provides a slurry dispersion device, including a buffer body 10, a dispersion mechanism 20, a return pipe 30, and a filter device 50. The discharge port 11 of the buffer body 10 is controlled to be connected to the dispersion mechanism 20 via a rotor pump, and the dispersion mechanism 20 is connected to the buffer body 10 via the return pipe 30. The discharge port 11 of the buffer body 10 is controlled to be connected to the filter device 50 via a rotor pump. The dispersion mechanism 20 includes a dispersion shell 21, a driver 22, and at least two kneading rollers 23. Each kneading roller 23 includes a conveying section 231, a kneading section 232, and a counterflow section 233 connected sequentially along its own axial direction Y. The direction of rotation of the conveying screw 23a on the conveying section 231 is opposite to the direction of rotation of the counterflow screw 23f on the counterflow section 233. The kneading section 232 includes a first kneading screw 23c and a second kneading screw 23d with opposite rotation directions. The direction of rotation of the first kneading screw 23c is the same as the direction of rotation of the conveying screw 23a on the conveying section 231. The filtration device 50 includes a filtration component 52 and a vibration component 53. The vibration component 53 is an ultrasonic transducer that can perform ultrasonic vibration on the filtration component 52. This configuration can create a multi-stage dispersion system with the synergistic effect of mechanical shearing and ultrasonic field, thereby enhancing dispersion capability and improving dispersion effect.

[0153] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0154] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A slurry dispersion device, characterized in that, The slurry dispersion device includes: The buffer body (10) contains a buffer cavity (12) for storing slurry; The dispersing mechanism (20) is used to receive the slurry output from the buffer chamber (12), and includes a driver (22) and at least two kneading rollers (23) that cooperate with each other, the driver (22) being used to drive the kneading rollers (23) to rotate about their respective axes. Each of the kneading rollers (23) includes a conveying section (231), a kneading section (232) and a counterflow section (233) distributed sequentially along its respective axial direction (Y). The kneading sections (232) of the kneading rollers (23) cooperate with each other. The conveying section (231) and the counterflow section (233) are both configured to drive the slurry toward the kneading section (232) when the kneading roller (23) rotates around its own axis. The return pipe (30) is connected to the dispersion mechanism (20) and is used to return the slurry output by the dispersion mechanism (20) to the buffer body (10).

2. The slurry dispersion device according to claim 1, characterized in that, The kneading section (232) includes a first kneading spiral (23c) and a second kneading spiral (23d) sequentially distributed along the axial direction (Y) of the kneading roller (23), wherein the rotation direction of the first kneading spiral (23c) is opposite to that of the second kneading spiral (23d).

3. The slurry dispersion device according to claim 2, characterized in that, The conveying section (231) includes a conveying spiral (23a), and the reverse flow section (233) includes a reverse flow spiral (23f) with the opposite direction of rotation to the conveying spiral (23a). The second kneading spiral (23d) is closer to the reverse flow spiral (23f) than the first kneading spiral (23c), and the direction of rotation of the second kneading spiral (23d) is the same as that of the reverse flow spiral (23f).

4. The slurry dispersion device according to claim 3, characterized in that, The lead of the first kneading screw (23c) is greater than the lead of the conveying screw (23a); and / or, The lead of the second kneading screw (23d) is greater than the lead of the reflux screw (23f).

5. The slurry dispersion device according to claim 3, characterized in that, The lead of the conveying spiral (23a) is greater than the lead of the counterflow spiral (23f).

6. The slurry dispersion device according to claim 2, characterized in that, The first kneading screw (23c) and / or the second kneading screw (23d) have a thread height of 30mm to 60mm on the kneading section (232).

7. The slurry dispersion device according to claim 1, characterized in that, The mating gap between the mating sections (232) is denoted as H1, where H1 is 0.5 mm to 3 mm; and / or, The dispersing mechanism (20) also includes a dispersing shell (21), and each of the kneading rollers (23) is rotatably disposed inside the dispersing shell (21). The minimum value of the gap between the kneading section (232) and the inner wall of the dispersing shell (21) is denoted as H2, where H2 is 0.5mm to 3mm.

8. The slurry dispersion apparatus according to any one of claims 1-7, characterized in that, The slurry dispersion device further includes a pumping device (40) for providing power for conveying the slurry in the slurry dispersion device.

9. A slurry dispersion device, characterized in that, The slurry dispersion equipment includes: The slurry dispersion apparatus as described in any one of claims 1-8; A filtration device (50) is used to receive the slurry output from the buffer body (10) or the dispersion mechanism (20) and to filter the slurry.

10. The slurry dispersion equipment according to claim 9, characterized in that, The filtration device (50) includes a filter housing (51), a vibration assembly (53), and a filter assembly (52) disposed within the filter housing (51). The filter assembly (52) is used to filter the slurry within the filter housing (51), and the vibration assembly (53) is used to vibrate the slurry at least before and / or during filtration.

11. The slurry dispersion equipment according to claim 10, characterized in that, The filter assembly (52) includes a plurality of filter elements (521) stacked along a preset direction (X), and has an inlet side (525) and an outlet side (526) disposed opposite to each other along the preset direction (X). In at least some of the filter elements (521), the flow area of ​​the filter holes on each filter element (521) decreases layer by layer along the direction from the inlet side (525) to the outlet side (526).

12. The slurry dispersion equipment according to claim 10 or 11, characterized in that, The filter device (50) further includes a backwashing assembly (70) for rinsing the filter assembly (52) in a direction opposite to the filtration direction.

13. A control method for a slurry dispersion device, employing the slurry dispersion device according to any one of claims 9-12, characterized in that, The method includes the following steps: The slurry is controlled to circulate through the buffer body (10) and the dispersion mechanism (20); Provided that the slurry circulation time reaches the preset time, the slurry in the buffer body (10) is controlled to enter the filter device (50).

14. The control method for the slurry dispersion equipment according to claim 13, characterized in that, The steps of controlling the slurry in the buffer body (10) to enter the filter device (50) include: The slurry in the buffer body (10) is controlled to enter the filter shell (51) of the filter device (50) and the slurry is made to flow through the filter assembly (52); The vibration control assembly (53) vibrates the filter assembly (52).

15. A battery production system, characterized in that, The battery production system includes the slurry dispersion equipment as described in any one of claims 9-12.

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