A stirring device applied to composite sodium iron phosphate slurry

Abstract

The utility model provides a kind of stirring device applied to composite sodium iron phosphate slurry, including stirring tank;Annularly be provided with mounting plate on the inner side of stirring tank, multiple groups of baffle plates are uniformly provided in mounting plate top end, filter cartridge is arranged in stirring tank, filter cartridge outer side surface is in contact with multiple groups of baffle plates, and limit part is arranged in filter cartridge top end, and limit part bottom end is in contact with baffle plate top portion;Stirring tank top is provided with end cover, end cover bottom is arranged in stirring tank, and it is in contact with multiple groups of baffle plate top end, and stirring motor is arranged in end cover top, stirring shaft is arranged between end cover and stirring tank, one end of stirring shaft is connected by coupling with stirring motor, vacuum pump is also arranged on end cover close to stirring motor.Baffle plate and stirring shaft screw belt cooperation, change slurry flow state, enhance mixing, shear paddle and its bubble breaking pore scatter particle, cut bubble;And vacuum pump and sealing element, accelerate bubble discharge, solve defoaming problem, stabilize slurry property.

Description

Technical Field

[0001] This utility model belongs to the technical field of stirring devices, and more specifically, it relates to a stirring device for composite sodium iron phosphate slurry. Background Technology

[0002] Composite sodium iron phosphate slurry, as a positive electrode active material, boasts low cost, high theoretical capacity, and good safety, making it a crucial intermediate product in battery production. This slurry contains solid particles and a liquid medium, making stirring essential. Stirring ensures uniform dispersion of solid particles, prevents sedimentation and agglomeration, promotes thorough mixing of components, and guarantees stable slurry concentration, particle size distribution, and other properties. This provides consistent raw materials for subsequent processes such as coating and molding, ensuring the electrochemical performance and structural stability of the final product.

[0003] However, traditional mixing devices suffer from insufficient shear force and inability to effectively remove air bubbles. Insufficient shear force will cause the internal particles of the composite sodium iron phosphate slurry to not be fully dispersed during mixing; at the same time, it will also cause particle agglomeration, making it difficult for the components to mix evenly and affecting the uniformity of the slurry; and the inability to effectively remove air bubbles will cause a large number of air bubbles generated during the mixing process to remain in the slurry due to the lack of an effective degassing mechanism in the device.

[0004] This not only alters the physical properties of the slurry, such as density and viscosity, but also causes numerous defects in subsequent processing, affecting product quality. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a stirring device for composite sodium iron phosphate slurry, which solves the technical problem in the prior art where the traditional stirring device has insufficient shear force and difficulty in degassing, resulting in uneven dispersion of slurry particles and residual air bubbles, thus affecting slurry performance and product quality.

[0006] The purpose and effect of the stirring device for composite sodium iron phosphate slurry of this utility model are achieved by the following specific technical means:

[0007] A mixing device for composite sodium ferric phosphate slurry includes a mixing tank. An mounting plate is annularly arranged on the inner side of the mixing tank. Multiple sets of baffles are evenly arranged at the top of the mounting plate. A filter cartridge is inserted inside the mixing tank, with its outer side contacting the multiple sets of baffles. A limiting part is provided at the top of the filter cartridge, and the bottom end of the limiting part contacts the top of the baffles. An end cap is provided at the top of the mixing tank, with its bottom end inserted inside the mixing tank and contacting the tops of the multiple sets of baffles. A stirring motor is mounted on the top of the end cap. A stirring shaft passes between the end cap and the mixing tank. One end of the stirring shaft is connected to the stirring motor via a coupling. A vacuum pump is also mounted on the end cap near the stirring motor.

[0008] The above technical solution further includes that the bottom end of the limiting part is evenly provided with a plurality of positioning blocks for limiting the position of the filter cartridge, and each set of positioning blocks is respectively locked between two sets of baffles; a guide hole is also provided on the mounting plate between each pair of baffles.

[0009] The above technical solution further includes that a sealing ring is sleeved at the bottom of the filter cartridge, and the periphery of the sealing ring contacts the mounting plate; a sealing element is provided at the bottom of the end cap, and the bottom end of the sealing element contacts the filter cartridge and the mixing tank respectively.

[0010] The above technical solution further includes that the stirring shaft includes a main rod, the filter cylinder is provided with a rotating seat, and the bottom end of the main rod is rotatably disposed in the rotating seat; multiple sets of connecting rods are evenly arranged on the main rod, and the main rod is connected to two sets of spiral ribbons through the multiple sets of connecting rods, the spiral directions of the two sets of spiral ribbons being opposite.

[0011] The above technical solution further includes that the connecting rod is also provided with a shearing blade, and the shearing blade has a plurality of sets of bubble-breaking pores evenly and through.

[0012] The above technical solution further includes that a mounting grid is provided on one side of the mixing tank, a display panel is installed inside the mounting grid, a temperature sensor is provided at the bottom of the end cap, a viscosity sensor is provided inside the filter cartridge, and both the temperature sensor and the viscosity sensor are electrically connected to the display panel.

[0013] The above technical solution further includes that a solenoid valve is provided on the discharge port at the bottom of the mixing tank; and a mounting platform for connecting external supports is provided on the outer side of the mixing tank near the discharge port.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Baffles alter the slurry flow pattern, allowing internal particles to disperse more evenly under forces in different directions. The spiral ribbons on the stirring shaft, with opposite spiral directions, drive the slurry's axial and radial flow, enhancing mixing. The shearing impeller and its bubble-breaking pores not only break up agglomerated particles but also cut large air bubbles. These synergistic effects effectively prevent particle agglomeration, ensuring uniform mixing of all components in the composite sodium iron phosphate slurry and providing a homogeneous raw material for subsequent processes.

[0016] 2. The filter cartridge and baffle plate work together to provide a channel for bubble movement. A vacuum pump extracts air from the mixing tank, reducing the air pressure and causing the bubbles to expand and rise. The sealing ring at the bottom of the filter cartridge and the sealing element at the bottom of the end cap ensure the tank's airtightness, facilitating vacuum degassing. At the same time, the shearing paddle breaks up large bubbles through its pores, increasing the contact between bubbles and the slurry, accelerating bubble removal, effectively solving the problem of difficult bubble removal in traditional devices, and ensuring the stability of the slurry's physical properties.

[0017] 3. The mixing tank is equipped with a mounting grid and a built-in display panel, connecting to temperature and viscosity sensors to provide real-time feedback on slurry temperature and viscosity data. Operators can adjust mixing parameters accordingly to ensure slurry performance. A solenoid valve is installed at the discharge port at the bottom of the mixing tank to control the discharge. A mounting platform on the side of the tank facilitates the connection of external supports, making the device stable and improving overall ease of operation and stability, ensuring smooth production. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the assembled structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of the mixing tank after assembly.

[0020] Figure 3 This is a schematic diagram of the structure of the stirring shaft of this utility model.

[0021] Figure 4 This is a bottom view of the end cap structure of this utility model.

[0022] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0023] 1. Mixing tank; 2. Filter cartridge; 3. End cap; 4. Stirring motor; 5. Stirring shaft; 6. Vacuum pump; 7. Display panel; 101. Baffle plate; 102. Limiting part; 201. Positioning block; 202. Guide hole; 301. Sealing ring; 302. Sealing element; 401. Main rod; 402. Connecting rod; 403. Ribbon; 501. Shearing paddle; 502. Bubble breaking pores; 601. Temperature sensor; 602. Viscosity sensor; 701. Solenoid valve; 702. Mounting platform. Detailed Implementation

[0024] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model. Example

[0025] like Figures 1 to 4As shown, this utility model provides a stirring device for composite sodium iron phosphate slurry, including a stirring tank 1. An mounting plate is arranged in a ring on the inner side of the stirring tank 1. Multiple sets of baffles 101 are evenly arranged at the top of the mounting plate. A filter cylinder 2 is inserted into the stirring tank 1. The outer side of the filter cylinder 2 contacts the multiple sets of baffles 101, and a limiting part 102 is provided at the top of the filter cylinder 2. The bottom end of the limiting part 102 contacts the top of the baffles 101. An end cover 3 is provided at the top of the stirring tank 1. The bottom of the end cover 3 is inserted into the stirring tank 1 and contacts the top of the multiple sets of baffles 101. A stirring motor 4 is provided at the top of the end cover 3. A stirring shaft 5 is inserted between the end cover 3 and the stirring tank 1. One end of the stirring shaft 5 is connected to the stirring motor 4 through a coupling. A vacuum pump 6 is also provided on the end cover 3 near the stirring motor 4. The inner annular mounting plate of the mixing tank 1 is equipped with multiple sets of baffles 101, which can change the flow direction of the slurry and prevent the slurry from forming vortices by rotating synchronously with the mixing shaft 5 during mixing, thereby improving the uniformity of mixing. The outer side of the filter cartridge 2 contacts the baffles 101, and the bottom end of the limiting part 102 contacts the top of the baffles 101, which can fix the position of the filter cartridge 2, prevent the filter cartridge 2 from shaking during mixing, and ensure that the filter cartridge 2 functions stably.

[0026] The mounting plate is arranged in a ring inside the mixing tank 1, providing a mounting base for the baffles 101 and ensuring that multiple sets of baffles 101 are evenly distributed. The baffles 101 are evenly arranged at the top of the mounting plate, which can uniformly change the flow direction of the slurry in different areas, improving the overall mixing effect. The mixing shaft 5 is connected to the mixing motor 4 via a coupling, facilitating disassembly and maintenance of the mixing shaft 5 and reducing equipment maintenance difficulty. The bottom of the end cover 3 penetrates into the mixing tank 1 and contacts the top of the baffles 101, enhancing the sealing of the mixing tank 1 and reducing slurry splashing during mixing. The mixing motor 4 is located at the top of the end cover 3 and is connected to the mixing shaft 5 via a coupling, providing stable power to the mixing shaft 5 and ensuring its continuous rotation. The mixing shaft 5 passes between the end cover 3 and the mixing tank 1, allowing it to penetrate deep into the mixing tank 1 to contact the slurry and achieve direct mixing.

[0027] The end cap 3 cooperates with the mixing tank 1 to form a closed mixing space, reducing the entry of external contaminants and ensuring the cleanliness of the slurry. The vacuum pump 6 is located close to the mixing motor 4, facilitating pipeline layout and reducing the space occupied by the device. The filter cartridge 2 is inserted into the mixing tank 1, allowing the slurry to pass through the filter cartridge 2 during the mixing process, achieving simultaneous mixing and filtration, and improving the slurry processing efficiency; the vacuum pump 6 on the end cap 3 can extract air from the mixing tank 1 to create a negative pressure environment, which helps to remove air bubbles from the slurry. The filter cartridge 2 contacts the baffle plate 101, which can filter the slurry, blocking large particles of impurities and preventing impurities from affecting the slurry quality. The limiting part 102 cooperates with the baffle plate 101 to restrict the vertical movement of the filter cartridge 2, ensuring the stability of the filter cartridge 2 during the mixing process.

[0028] like Figure 2As shown, multiple sets of positioning blocks 201 for limiting the position of the filter cartridge 2 are evenly arranged at the bottom end of the limiting part 102. Each set of positioning blocks 201 is respectively engaged between two sets of baffles 101; a guide hole 202 is also provided on the mounting plate between each pair of baffles 101. The positioning blocks 201 at the bottom end of the limiting part 102 are engaged between two sets of baffles 101 to limit the horizontal movement of the filter cartridge 2. The even distribution of multiple sets of positioning blocks 201 ensures that the filter cartridge 2 is subjected to balanced force, preventing the filter cartridge 2 from shifting due to uneven force during stirring, ensuring that the filter cartridge 2 and the baffles 101 always maintain contact, and ensuring the stable functioning of the filter cartridge 2; the guide holes 202 on the mounting plate between the two sets of baffles 101 can guide the flow of slurry. During stirring, the slurry can flow between different areas through the guide holes 202, increasing the slurry mixing path, improving the degree of slurry mixing in each area, reducing stirring dead zones, and further ensuring the uniformity of slurry mixing.

[0029] A sealing ring 301 is fitted at the bottom of the filter cartridge 2, and the periphery of the sealing ring 301 contacts the mounting plate. A sealing element 302 is provided at the bottom of the end cap 3, and the bottom end of the sealing element 302 contacts both the filter cartridge 2 and the mixing tank 1. The sealing ring 301, fitted at the bottom of the filter cartridge 2 and with its periphery in contact with the mounting plate, fills the gap between the filter cartridge 2 and the mounting plate, preventing the slurry from leaking out of the gap and avoiding the formation of dead corners in the mixing tank 1, thus ensuring that the slurry fully participates in the mixing. The sealing element 302, located at the bottom of the end cap 3 and with its bottom end in contact with both the filter cartridge 2 and the mixing tank 1, enhances the sealing between the end cap 3 and the filter cartridge 2 and the mixing tank 1, preventing outside air from entering the mixing tank 1 and avoiding the negative pressure environment inside the mixing tank 1 from being affected, thus ensuring the degassing effect of the vacuum pump 6.

[0030] like Figures 2 to 3 As shown, the stirring shaft 5 includes a main rod 401, and a rotating seat is provided inside the filter cylinder 2. The bottom end of the main rod 401 is rotatably mounted inside the rotating seat. Multiple sets of connecting rods 402 are evenly arranged on the main rod 401. The main rod 401 is connected to two sets of spiral ribbons 403 via the connecting rods 402, with the spiral directions of the two sets of ribbons 403 being opposite. The bottom end of the main rod 401 is rotatably mounted inside the rotating seat, which provides a support point for the main rod 401 inside the filter cylinder 2, restricting the radial displacement of the main rod 401, ensuring the stability of the axis of the main rod 401 during rotation, preventing the main rod 401 from shaking and causing uneven stirring, and ensuring the smooth operation of the stirring shaft 5.

[0031] Multiple sets of connecting rods 402 are evenly arranged on the main rod 401 to connect the main rod 401 with the helical ribbon 403, transmitting the rotational force of the main rod 401 to the helical ribbon 403. The evenly distributed connecting rods 402 ensure that the helical ribbon 403 is subjected to balanced force, preventing damage due to excessive local stress and extending its service life. Two sets of helical ribbons 403 are connected to the main rod 401 through the connecting rods 402. When they rotate with the main rod 401, they can drive the slurry in the filter cartridge 2 to move axially. The structure with opposite helical directions causes the two sets of helical ribbons 403 to generate opposite thrusts on the slurry, promoting the slurry to circulate vertically, expanding the mixing range, improving the mixing degree of each part of the slurry, and enhancing the mixing effect.

[0032] A shearing paddle 501 is also provided on the connecting rod 402, and multiple sets of defoaming pores 502 are evenly distributed throughout the shearing paddle 501. The shearing paddle 501, positioned on the connecting rod 402, rotates with the connecting rod 402, contacting the slurry to generate a shearing action. This breaks up particle agglomerates, promotes particle dispersion, improves the mixing degree of the slurry components, ensures uniform component distribution, and meets the requirements of subsequent processing. The defoaming pores 502 evenly distributed throughout the shearing paddle 501 cause bubbles to break up under shear force as the slurry flows through the pores. The broken bubbles are more easily released from the slurry, reducing bubble residue. Simultaneously, the pores alter the slurry flow path, increasing the contact opportunity between the slurry and the shearing paddle 501, enhancing the shearing effect, improving mixing efficiency, and ensuring stable slurry performance.

[0033] like Figure 1 , Figure 2 and Figure 4 As shown, a mounting grid is provided on one side of the mixing tank 1, and a display panel 7 is installed inside the grid. A temperature sensor 601 is installed at the bottom of the end cap 3, and a viscosity sensor 602 is installed inside the filter cartridge 2. Both the temperature sensor 601 and the viscosity sensor 602 are electrically connected to the display panel 7. The display panel 7, installed inside the grid, provides a data display medium for the temperature sensor 601 and the viscosity sensor 602. The display panel 7 is electrically connected to both sensors and can display the detection data in real time, allowing operators to intuitively grasp the temperature and viscosity of the slurry and understand the changes in slurry performance during the mixing process. The temperature sensor 601, located at the bottom of the end cap 3, can directly contact the slurry inside the mixing tank 1 to detect the slurry temperature. The viscosity sensor 602, located inside the filter cartridge 2, can directly monitor the viscosity of the slurry inside the filter cartridge 2. The two sensors work together to provide real-time data to the display panel 7, ensuring that operators can adjust the mixing parameters based on the data and ensure stable slurry quality. The temperature sensor 601 can be an FT-55AP model temperature sensor; the viscosity sensor 602 can be a KMY401-V model temperature sensor.

[0034] like Figures 1 to 2As shown, a solenoid valve 701 is also installed at the discharge port at the bottom of the mixing tank 1; a mounting platform 702 for connecting external supports is also installed on the outer side of the mixing tank 1 near the discharge port. The solenoid valve 701 is located at the discharge port at the bottom of the mixing tank 1 and can control the opening and closing of the discharge port to realize the automation of slurry discharge, reduce manual operation, improve discharge efficiency, control the discharge volume, and ensure a stable supply of raw materials for subsequent processes; the mounting platform 702 is located on the outer side of the mixing tank 1 near the discharge port and connects to external supports to provide stable support for the mixing tank 1, preventing the mixing tank 1 from shifting due to its own weight or mixing vibration, ensuring the stability of the overall structure, and ensuring the smooth progress of the mixing and discharge process.

[0035] The above description is merely an embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A stirring device for composite sodium ferric phosphate slurry, comprising a stirring tank (1), characterized in that: An installation plate is provided in a ring shape on the inner side of the mixing tank (1). Multiple sets of baffles (101) are evenly arranged on the top of the installation plate. A filter cylinder (2) is inserted inside the mixing tank (1). The outer side of the filter cylinder (2) is in contact with the multiple sets of baffles (101). A limiting part (102) is provided at the top of the filter cylinder (2). The bottom end of the limiting part (102) is in contact with the top of the baffle (101). The mixing tank (1) is provided with an end cap (3) at the top. The bottom of the end cap (3) passes through the mixing tank (1) and contacts the top of the multiple sets of baffles (101). The end cap (3) is provided with a stirring motor (4) at the top. A stirring shaft (5) passes through the end cap (3) and the mixing tank (1). One end of the stirring shaft (5) is connected to the stirring motor (4) through a coupling. A vacuum pump (6) is also provided on the end cap (3) near the stirring motor (4).

2. The stirring device for composite sodium ferric phosphate slurry according to claim 1, characterized in that: The bottom end of the limiting part (102) is evenly provided with multiple sets of positioning blocks (201) for limiting the position of the filter cartridge (2). Each set of positioning blocks (201) is respectively locked between two sets of baffles (101). A guide hole (202) is also provided on the mounting plate between each two sets of baffles (101).

3. The stirring device for composite sodium ferric phosphate slurry according to claim 2, characterized in that: The bottom end of the filter cartridge (2) is fitted with a sealing ring (301), and the periphery of the sealing ring (301) is in contact with the mounting plate; the bottom of the end cap (3) is provided with a sealing element (302), and the bottom end of the sealing element (302) is in contact with the filter cartridge (2) and the mixing tank (1) respectively.

4. The stirring device for composite sodium ferric phosphate slurry according to claim 1, characterized in that: The stirring shaft (5) includes a main rod (401), and a rotating seat is provided inside the filter cylinder (2). The bottom end of the main rod (401) is rotatably disposed inside the rotating seat. Multiple sets of connecting rods (402) are evenly arranged on the main rod (401). The main rod (401) is connected to two sets of spiral ribbons (403) through the multiple sets of connecting rods (402). The spiral directions of the two sets of spiral ribbons (403) are opposite.

5. The stirring device for composite sodium ferric phosphate slurry according to claim 4, characterized in that: The connecting rod (402) is also provided with a shearing blade (501), and multiple sets of bubble-breaking pores (502) are uniformly opened through the shearing blade (501).

6. The stirring device for composite sodium ferric phosphate slurry according to claim 1, characterized in that: The mixing tank (1) has an installation grid on one side, and a display panel (7) is installed inside the installation grid. A temperature sensor (601) is installed at the bottom of the end cap (3), and a viscosity sensor (602) is installed inside the filter cartridge (2). Both the temperature sensor (601) and the viscosity sensor (602) are electrically connected to the display panel (7).

7. The stirring device for composite sodium ferric phosphate slurry according to claim 1, characterized in that: A solenoid valve (701) is also provided on the discharge port at the bottom of the mixing tank (1). The mixing tank (1) is also provided with an installation platform (702) for connecting external supports on the outer side near the discharge port.

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