Stirring device for preparing ternary precursor
By designing a stirring device with inclined blade opening turbine propeller and straight blade disc turbine propeller, combined with L-shaped feed pipe and baffle, the mixing and suspension problems of ternary precursor feed liquid were solved, and the electrochemical performance was improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-03-10
AI Technical Summary
Existing technologies cannot achieve micro-mixing and macro-flow of ternary precursor feed solutions in a very short time, leading to particle sedimentation and affecting electrochemical performance.
The mixing device is designed with upper and middle layer blades as inclined blades for turbine propulsion and bottom layer blades as straight blades for disk turbine propulsion. Combined with L-shaped feed pipe and radial baffle, it enhances axial and radial circulation performance as well as shear performance.
This achieves rapid dispersion and uniform mixing of the raw material liquid, ensuring that the ternary precursor solid particles are uniformly suspended in the liquid phase, thus improving electrochemical performance.
Smart Images
Figure CN223980404U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to ternary precursor preparation technical field, especially a kind of stirring device for preparing ternary precursor. BACKGROUND
[0002] Ternary precursor material is nickel cobalt manganese hydroxide Ni x Co y Mn (1-x-y) (OH)2, with good cycle performance, high specific capacity, high safety and low cost etc., become the most promising lithium-ion battery cathode material. Co-precipitation method has the advantage of large-scale continuous production, and its product components are uniform and particle size distribution is uniform, which is the mainstream production process for the industrial preparation of ternary materials. Co-precipitation method is generally used most in hydroxide co-precipitation method, and the main process route is: nickel, cobalt and manganese soluble salt aqueous solution is reacted with sodium hydroxide aqueous solution as precipitant in the presence of ammonia complexing agent to generate nickel cobalt manganese hydroxide precipitate with certain particle size distribution, crystal structure and surface micro-morphology. Reaction kettle is the core production equipment of precursor, and the stirrer determines the flow, mixing, reaction and solid phase suspension in the reaction kettle, and affects the performance of the precursor such as morphology, specific surface area, particle size and particle size distribution, and further determines the electrochemical performance. The reaction equilibrium constant of co-precipitation system is very large, the reaction rate is very fast, and the reaction time is very short, so the raw material liquid needs to reach micro-mixing state in a very short time to ensure the stability of the crystallization process. The slurry in the kettle needs to have a certain circulation amount to avoid the settlement of ternary precursor particles. The reaction kettle stirrer needs to consider the needs of macro-flow state and micro-mixing. Therefore, the selection and design of the stirrer are very critical. UTILITY MODEL CONTENT
[0003] The utility model solves the problems in the related art, and provides a stirring device for preparing ternary precursor. The upper and middle layer paddles are inclined blade opening turbine paddles, which belong to axial flow impellers, have excellent axial circulation performance and shear performance, and the bottom layer paddle is a straight blade disc turbine paddle with tooth structure, which belongs to radial flow impeller and has excellent radial circulation performance and shear performance. Therefore, the stirring device has excellent circulation performance and shear performance, can rapidly disperse and mix the raw material liquid, promote the flow, mixing, reaction and solid phase suspension process, and the ternary precursor solid phase particles generated in the reaction can be uniformly suspended in the liquid phase.
[0004] To solve the above technical problems, the utility model is through the following technical scheme realizes: a kind of stirring device for preparing ternary precursor, including stirring tank, stirrer, the stirrer is installed in stirring tank and rotates by driving device drive, the stirrer includes stirring shaft and installs on the stirring shaft and stirs paddle, the stirring paddle includes upper layer stirring paddle and lower layer stirring paddle, the upper layer stirring paddle is inclined vane open turbine paddle, the lower layer stirring paddle is straight vane disc turbine paddle.
[0005] As preferred scheme, it further includes middle layer stirring paddle between upper layer stirring paddle and lower layer stirring paddle, the middle layer stirring paddle is also inclined vane open turbine paddle.
[0006] As preferred scheme, the number of vane of the upper layer stirring paddle and middle layer stirring paddle is 2-8, and the inclination angle of vane is 5-85 °.
[0007] As preferred scheme, the lower layer stirring paddle includes disc and uniformly arranged toothed vane on disc, and the number of toothed vane is 2-8.
[0008] As preferred scheme, the feeding pipe is L-shaped structure, and the bottom height of feeding pipe is consistent with the center position of toothed vane.
[0009] As preferred scheme, the inside of stirring tank is further provided with 2-6 baffles arranged in array along the radial direction thereof.
[0010] Compared with prior art, the utility model has the advantages that: the upper layer and middle layer paddle of the utility model are inclined vane open turbine paddle, belonging to axial flow impeller, with excellent axial circulation performance and shear performance, the bottom paddle is straight vane disc turbine paddle, belonging to radial flow impeller, with excellent radial circulation performance and shear performance. Therefore, the stirring device of the utility model has excellent circulation performance and shear performance, can rapidly disperse and mix raw material liquid, promote flow, mixing, reaction and solid phase suspension process, and the ternary precursor solid phase particles generated in reaction can be uniformly suspended in liquid phase; in addition, the vane of straight vane disc turbine paddle is toothed structure, which can further strengthen shear and mixing process; the feeding pipe is L-shaped structure, and the bottom of feeding pipe is close to lower layer stirring paddle, which can rapidly disperse and mix liquid; the inside of stirring tank is further provided with baffles arranged in array along the radial direction thereof, the baffles change the flow direction of material, thereby eliminating the concave vortex generated in central part of liquid surface, improving mixing effect, and preventing material from splashing. BRIEF DESCRIPTION OF DRAWINGS
[0011] Fig. 1 It is the overall structure schematic diagram of the utility model;
[0012] Fig. 2is a structural schematic view of the stirrer of the utility model;
[0013] Fig. 3 is a structural schematic view of the lower stirring paddle of the utility model.
[0014] In the drawing:
[0015] 1, stirring tank, 2, stirring shaft, 3, upper stirring paddle, 4, lower stirring paddle, 401, disc, 402, toothed blade, 5, middle stirring paddle, 6, feed pipe, 7, baffle. DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.
[0017] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.
[0018] Unless otherwise specified, the relative arrangement of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that the size of each part shown in the drawings is not drawn in proportion to the actual proportion. The technology, method and equipment known to those skilled in the art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as part of the authorized specification. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.
[0019] In the description of the utility model, it is understood that the orientation words such as '' front, back, top, bottom, left, right '' '' horizontal, vertical, perpendicular, horizontal '' and '' top, bottom '' and the like indicated orientation or positional relationship usually based on the orientation or positional relationship shown in the drawing, just for the convenience of describing the utility model and simplifying the description, in the absence of the opposite statement, these orientation words do not indicate and imply the device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore it can not be understood as the limitation of the protection scope of the utility model;The orientation words '' inside, outside '' refer to the inside and outside relative to the contour of each component.
[0020] For the convenience of description, spatial relative terms such as '' above'', '' above'', '' upper surface'', '' upper '' and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawing. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawing. For example, if the device in the drawing is inverted, the device described as '' above '' or '' above '' other devices or structures will be positioned '' below '' or '' below '' other devices or structures. Thus, the exemplary term '' above '' can include both '' above '' and '' below '' orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used herein is interpreted accordingly.
[0021] In addition, it should be noted that the use of '' first'', '' second '' and the like to limit parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore it can not be understood as the limitation of the protection scope of the utility model.
[0022] As shown in Figs. 1 to 3 A stirring device for preparing ternary precursor, comprising a stirring tank 1, a stirrer, the stirrer is installed in the stirring tank 1 and is rotated by driving device (such as motor, not shown in the drawing), the stirrer includes stirring shaft 2 and the stirring paddle installed on the stirring shaft 2, the stirring paddle includes upper stirring paddle 3 and lower stirring paddle 4, the upper stirring paddle 3 is inclined vane open turbine paddle, and the lower stirring paddle 4 is straight vane disc turbine paddle.
[0023] In one embodiment, it also includes middle layer stirring paddle 5 between upper stirring paddle 3 and lower stirring paddle 4, and the middle layer stirring paddle 5 is also inclined vane open turbine paddle.
[0024] In one embodiment, the number of blades of the upper stirring paddle 3 and the middle stirring paddle 5 is 2-8, and in this embodiment, 4 blades are used, and the inclination angle of the blades is 5-85°, and in this embodiment, the inclination angle of the blades is 45°.
[0025] In one embodiment, the lower stirring paddle 4 comprises a disc 401 and toothed blades 402 arranged uniformly on the disc, the toothed blades 402 are in rectangular structure, and the 4 edges of the rectangular structure can all be toothed (as shown in Fig. 2 In one embodiment, the lower stirring paddle 4 comprises a disc 401 and toothed blades 402 arranged uniformly on the disc, the toothed blades 402 are in rectangular structure, and the 4 edges of the rectangular structure can all be toothed (as shown in Fig. 3 In one embodiment, the number of blades of the lower stirring paddle 4 is 2-8, and in this embodiment, as shown in Fig. 3 In one embodiment, the number of blades of the lower stirring paddle 4 is 2-8, and in this embodiment, as shown in
[0026] In one embodiment, the stirring tank 1 is provided with a feeding pipe 6, the feeding pipe 6 is in L-shaped structure, the bottom height of the feeding pipe 6 is consistent with the center position of the toothed blades 402, the bottom of the feeding pipe 6 is close to the lower stirring paddle 4, and the spacing is 50-100mm, and this design can quickly disperse the mixed liquid.
[0027] In one embodiment, the inside of the stirring tank 1 is further provided with 2-6 baffles 7 arranged in array along the radial direction thereof, the baffles 7 change the flow direction of the material, thereby eliminating the concave vortex generated in the central part of the liquid surface, improving the mixing effect, and also preventing the material from splashing.
[0028] The above is the preferred embodiment of the present application, and the person skilled in the art of the present application can also change and modify the above embodiment, therefore, the present application is not limited to the above specific embodiments, and any obvious improvement, replacement or modification made by the person skilled in the art on the basis of the present application all belong to the protection scope of the present application.
Claims
1. A stirring device for preparing a ternary precursor, characterized by: The utility model relates to a stirring tank (1), stirrer, the stirrer is installed in stirring tank (1) and is driven to rotate through drive arrangement, the stirrer includes stirring shaft (2) and installs on stirring shaft (2) and includes upper layer stirring paddle (3) and lower layer stirring paddle (4) on stirring paddle, upper layer stirring paddle (3) is inclined vane open turbine paddle, lower layer stirring paddle (4) is straight vane disc turbine paddle.
2. The stirring device for preparing a ternary precursor according to claim 1, characterized in that: Still include the middle layer stirring paddle (5) between upper layer stirring paddle (3) and lower layer stirring paddle (4), the middle layer stirring paddle (5) also is inclined vane open turbine paddle.
3. The stirring device for preparing a ternary precursor according to claim 2, characterized in that: The number of the blades of the upper layer stirring paddle (3) and the middle layer stirring paddle (5) is 2-8, and the inclination angle of the blades is 5-85°.
4. The stirring device for preparing a ternary precursor according to claim 1, characterized in that: The lower layer stirring paddle (4) includes a disc (401) and toothed blades (402) uniformly arranged on the disc, and the number of the toothed blades (402) is 2-8.
5. The stirring device for preparing a ternary precursor according to claim 4, characterized in that: The stirring tank (1) is provided with a feeding pipe (6) therein, the feeding pipe (6) is of an L-shaped structure, and the bottom height of the feeding pipe (6) is consistent with the center position of the toothed blades (402).
6. The stirring device for preparing a ternary precursor according to claim 1, characterized in that: The inside of the stirring tank (1) is further provided with 2-6 baffles (7) arranged in an array along the radial direction thereof.