A washing device

Abstract

This utility model discloses a washing device, relating to the field of lithium-ion battery manufacturing technology. The washing device includes a tank, a stirring assembly, and a washing assembly. A filter disc is disposed within the tank, and the material to be washed is located on the filter disc. The tank is connected to a feed pipe. The stirring assembly includes a stirring paddle, which is rotatably disposed within the tank and above the filter disc. The stirring paddle is capable of moving up and down within the tank. The washing assembly is disposed within the tank and above the stirring paddle, and is configured to supply washing liquid to the tank. This washing device prevents the stirring paddle from jamming, and the stirring paddle does not interfere with the operator's ability to remove precursor particles from the washing device, thus improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery manufacturing technology, and in particular to a washing device. Background Technology

[0002] The preparation of electrode material precursors mostly employs co-precipitation reactions, resulting in residual impurity ions on the surface and pores of the precursor particles. Therefore, washing with a washing device is necessary to improve the purity of the precursor. Generally, the washing device is equipped with a stirring paddle to drive thorough mixing of the washing liquid and the precursor particles, ensuring washing efficiency and effectiveness.

[0003] However, after the washing liquid is discharged, the precursor particles deposit at the bottom of the washing device to form a filter cake. The filter cake can easily jam the agitator, and the agitator can also prevent the operator from removing the filter cake from the washing device, thus affecting production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a washing device that does not cause the agitator to jam, and the agitator does not prevent the operator from removing the precursor particles from the washing device, thereby improving production efficiency.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A washing device, comprising:

[0007] The tank body is equipped with a filter disc, the material to be washed is located on the filter disc, and the tank body is connected to a feed pipe;

[0008] A stirring assembly, comprising a stirring paddle, which is rotatably disposed within the tank and positioned above the filter disc, and the stirring paddle is capable of moving up and down within the tank;

[0009] A washing assembly disposed within the tank and above the agitator, the washing assembly being configured to supply washing liquid into the tank.

[0010] As an optional feature of the above-mentioned washing device, when the agitator stops rotating, the agitator is positioned above the material.

[0011] As an optional embodiment of the above washing device, the stirring assembly further includes a stirring scraper, which is connected to the stirring paddle and extends downward, and the stirring scraper can abut against the filter plate and scrape the filter plate.

[0012] As an alternative to the above-mentioned washing device, the agitation assembly includes a plurality of agitation scrapers, and the plurality of agitation scrapers are arranged at radial intervals along the agitation paddle.

[0013] As an optional embodiment of the above-mentioned washing device, the stirring scraper includes a scraper portion, which is elastic and can switch between a free state and a scraper state. The scraper portion is in the free state when it is above the filter plate, and in the scraper state when it is in contact with the filter plate.

[0014] As an optional embodiment of the above washing device, the stirring assembly includes a plurality of stirring scrapers. When the scraper is in the scraper state, the stirring scraper has a scraping range, and the scraping range of the plurality of stirring scrapers completely covers the surface of the filter disc.

[0015] As an optional solution for the above-mentioned washing device, the stirring assembly further includes a mounting base, a lifting drive component, and a transmission shaft. The mounting base is equipped with a drive motor, the transmission shaft passes through the tank body, one end of the transmission shaft is connected to the stirring paddle, and the other end of the transmission shaft is connected to the output shaft of the drive motor. The lifting drive component is located in the tank body and can drive the mounting base to rise and fall.

[0016] As an optional embodiment of the above-mentioned washing device, the washing assembly includes an annular spray pipe and a connecting pipe. The connecting pipe is connected to the annular spray pipe and extends out of the tank. The annular spray pipe is provided with multiple spray heads at intervals.

[0017] As an optional solution for the above washing device, a discharge port is provided on the side wall of the tank, and a discharge valve is provided at the discharge port. The lowest point of the discharge port is higher than the upper surface of the filter plate or the lowest point of the discharge port is at the same height as the upper surface of the filter plate.

[0018] As an alternative to the above-mentioned washing device, the washing device further includes a level gauge configured to detect the liquid level height inside the tank.

[0019] The beneficial effects of this utility model are:

[0020] This invention provides a washing device. In this device, precursor slurry is fed into a tank through a feed pipe. A stirring paddle agitates the slurry, causing it to settle evenly on a filter plate. Then, a washing component sprays washing liquid into the tank, and the stirring paddle further agitates the slurry and washing liquid to form a suspension of precursor particles, ensuring full contact between the particles and the washing liquid. After washing, the stirring paddle rises above the precursor particles and discharges the washing liquid. Because the stirring paddle detaches from the precursor particles, the deposited particles do not cause the stirring paddle to jam, and the stirring paddle does not hinder the operator from removing the precursor particles from the washing device, thus improving production efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a washing device provided in one embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of a washing device provided in one embodiment of the present invention.

[0023] In the picture:

[0024] 1. Tank body; 11. Filter plate; 12. Feed pipe; 13. Flow meter; 14. Level gauge; 15. Discharge port; 16. Discharge valve; 17. Air inlet; 18. Drain pipe; 19. Drain valve;

[0025] 2. Mixing assembly; 21. Mixing paddle; 22. Mixing scraper; 221. Scraper blade; 23. Mounting base; 24. Lifting drive component; 25. Drive shaft; 26. Drive motor;

[0026] 3. Washing components; 31. Spray pipe; 32. Connecting pipe; 33. Spray head. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0029] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] This embodiment provides a washing device for washing precursor slurry, thereby removing residual impurity ions from the particle surface and pores of the precursor and improving the purity of the precursor. Figure 1 and Figure 2 As shown, the washing device includes a tank 1, a filter plate 11 is provided inside the tank 1, the material to be washed is located on the filter plate 11, the tank 1 is connected to a feed pipe 12, the precursor slurry enters the tank 1 through the feed pipe 12 and is carried on the filter plate 11.

[0033] It is worth noting that the type of washing solution needs to be determined based on the preparation process of the precursor, in order to select a suitable washing solution to remove impurity ions. In this embodiment, the precursor of Ni-Co-Mn hydroxide is used as an example. The main impurity ions remaining in the precursor particles are sulfate ions and sodium ions. Therefore, the washing solution is dilute alkali (concentration of 2% to 5%, prepared by diluting liquid alkali solution) and pure water. The dilute alkali is mainly used to remove the sulfate ions remaining on the surface and in the pores of the precursor particles, while the pure water is mainly used to wash away the sodium ions remaining in the particles, ultimately controlling the impurity ion index within the specified range.

[0034] like Figure 1 and Figure 2 As shown, the washing device also includes a stirring assembly 2 and a washing assembly 3. The stirring assembly 2 includes a stirring paddle 21, which is rotatably disposed inside the tank 1 and located above the filter plate 11. The stirring paddle 21 can rise and fall inside the tank 1. The washing assembly 3 is disposed inside the tank 1 and located above the stirring paddle 21. The washing assembly 3 is configured to provide washing liquid to the tank 1.

[0035] In this washing device, the precursor slurry is fed into the tank 1 through the feed pipe 12. The agitator 21 stirs the slurry, causing it to settle evenly on the filter plate 11. Then, the washing component 3 sprays washing liquid into the tank 1, and the agitator 21 thoroughly stirs the slurry and washing liquid in the tank 1 to form a suspension of precursor particles, ensuring full contact between the precursor particles and the washing liquid. After washing is complete, the agitator 21 rises to a height higher than the precursor particles and discharges the washing liquid. Because the agitator 21 is detached from the precursor particles, the deposited precursor particles do not cause the agitator 21 to jam, and the agitator 21 does not hinder the operator from removing the precursor particles from the washing device, thus improving production efficiency.

[0036] In this embodiment, when the stirring paddle 21 stops rotating, it is positioned above the material. It is worth noting that "stirring paddle 21 is above the material" means that even after the material has completely settled, the stirring paddle 21 remains higher than the material, thus ensuring that the material does not jam the stirring paddle 21.

[0037] like Figure 1 and Figure 2 As shown, the top of the tank 1 is provided with an air inlet 17, which is configured to introduce compressed air into the tank 1. The compressed air increases the pressure inside the tank 1, thereby filtration of the precursor particles inside the tank 1, and allowing the water and washing liquid of the precursor slurry to pass through the filter plate 11 to complete solid-liquid separation.

[0038] like Figure 2 As shown, the stirring assembly 2 also includes a stirring scraper 22, which is connected to the stirring paddle 21 and extends downward. The stirring scraper 22 can abut against the filter plate 11 and scrape the filter plate 11. The stirring scraper 22 can increase the stirring range, thereby enhancing the stirring effect and promoting the washing effect and washing efficiency of the washing liquid on the precursor particles. It can also descend with the stirring paddle 21 to abut against the filter plate 11, thereby scraping off the precursor particles from the surface of the filter plate 11, making it easier for the operator to remove the precursor particles and clean the filter plate 11.

[0039] It is worth noting that the relative movement between the stirring scraper 22 and the filter plate 11 can easily damage the filter plate 11 or the stirring scraper 22, and also generates a lot of noise. In this embodiment, the stirring scraper 22 includes a scraper portion, which is elastic and can switch between a free state and a scraper state. When the scraper portion is above the filter plate 11, it is in a free state, and when the scraper portion abuts against the filter plate 11, it is in a scraper state.

[0040] When the scraper is in a free state, the agitator 21 is suspended in the tank 1. At this time, the agitator 21 and the agitator scraper 22 can agitate the liquid in the tank 1. When the scraper is in the scraping state, the scraper undergoes elastic deformation, which can increase the contact area and abutment pressure between the scraper and the filter disc 11, improve the scraping effect, reduce the wear between the scraper and the filter disc 11, and extend the service life.

[0041] Preferably, the scraper section includes at least two scraper blades 221. When the scraper section abuts against the filter plate 11, the bottom ends of the two scraper blades 221 are far apart to increase the scraping range of the stirring scraper 22. The scraping range of the stirring scraper 22 refers to the area swept across the surface of the filter plate 11 by the scraper section after the stirring scraper 22 is in scraping mode and rotates one revolution with the stirring paddle 21.

[0042] In this embodiment, the stirring assembly 2 includes multiple stirring scrapers 22. When the scraper is in the scraping state, the stirring scraper 22 has a scraping range, and the scraping range of the multiple stirring scrapers 22 completely covers the surface of the filter tray 11. Since the scraping range of the multiple stirring scrapers 22 completely covers the surface of the filter tray 11, it ensures that the stirring scrapers 22 can scrape off the precursor particles from the surface of the filter tray 11, avoiding any dead corners.

[0043] In this embodiment, the multiple stirring scrapers 22 of the stirring assembly 2 are arranged at radial intervals along the stirring paddle 21. That is, the multiple stirring scrapers 22 are arranged in a row, which improves the stirring efficiency and coverage area and prevents local deposition.

[0044] like Figure 1 and Figure 2 As shown, the stirring assembly 2 also includes a mounting base 23, a lifting drive component 24, and a drive shaft 25. A drive motor 26 is mounted on the mounting base 23. The drive shaft 25 passes through the tank body 1, with one end connected to the stirring paddle 21 and the other end connected to the output shaft of the drive motor 26. The lifting drive component 24 is mounted on the tank body 1 and can drive the mounting base 23 to rise and fall. When the lifting drive component 24 drives the mounting base 23 to rise and fall, the drive motor 26 and the drive shaft 25 also rise and fall accordingly, thereby driving the stirring paddle 21 to rise and fall.

[0045] Preferably, the lifting drive component 24 is a hydraulic rod, and in order to ensure balance, four hydraulic rods are provided, which are arranged at intervals around the drive shaft 25.

[0046] In this embodiment, the washing assembly 3 includes an annular spray pipe 31 and a connecting pipe 32. The connecting pipe 32 is connected to the annular spray pipe 31 and extends out of the tank 1. The annular spray pipe 31 is provided with multiple spray heads 33 at intervals. The annular spray pipe 31 can improve the washing range of the washing assembly 3, realize all-round cleaning of the precursor, and also complete the washing of the stirring paddle 21 and the stirring scraper 22.

[0047] Understandably, after the precursor in tank 1 is pressure filtered, the liquid reaches the bottom of tank 1 after passing through filter plate 11. In order to facilitate the discharge of liquid, a drain pipe 18 is provided at the bottom of tank 1, and a drain valve 19 is provided on the drain pipe 18. When it is necessary to discharge liquid, the drain valve 19 is opened, and the liquid is discharged through the drain pipe 18 to avoid the liquid height exceeding the filter plate 11 and affecting the pressure filtration effect on the precursor.

[0048] like Figure 1 and Figure 2 As shown, a discharge port 15 is provided on the side wall of the tank 1, and a discharge valve 16 is provided at the discharge port 15. The lowest point of the discharge port 15 is higher than the upper surface of the filter plate 11, or the lowest point of the discharge port 15 is at the same height as the upper surface of the filter plate 11. The operator can remove the pre-filter material after filtration through the discharge port 15. When the lowest point of the discharge port 15 is at the same height as the upper surface of the filter plate 11, the operator can dig it out directly. When the lowest point of the discharge port 15 is higher than the upper surface of the filter plate 11, the operator needs to continue digging downwards after digging out the upper layer of pre-filter material.

[0049] This structure facilitates the sealing between the filter disc 11 and the inner wall of the tank 1, enabling the filter disc 11 to fully filter the precursor and preventing precursor particles from passing through the gap between the filter disc 11 and the inner wall of the tank 1 and causing loss.

[0050] like Figure 1 and Figure 2 As shown, the washing device also includes a level gauge 14 and a flow meter 13. The level gauge 14 is configured to detect the liquid level in the tank 1, and the flow meter 13 is installed in the feed pipe 12 to detect the amount of precursor slurry entering the tank 1. The function of the level gauge 14 is to provide real-time alerts to the operator regarding the liquid level in the tank 1, preventing overflow due to excessive liquid level, which would result in a large amount of solution containing precursor particles overflowing, making cleaning difficult and time-consuming. The function of the flow meter 13 is to calculate the slurry volume, thereby calculating the maximum height of the precursor in the tank 1, ensuring that the agitator 21 is above the precursor when it stops working, preventing the agitator 21 from jamming.

[0051] The washing process for precursor particles in this washing device is as follows:

[0052] Lower the stirring paddle 21 so that the stirring scraper 22 is spaced apart from the filter plate 11, preferably at a distance of 5 to 10 cm;

[0053] The precursor slurry is fed into the tank 1 through the feed pipe 12, and the volume of the precursor slurry is calculated using the flow meter 13. At the same time, the drive motor 26 is started to drive the agitator 21 to rotate, so that the precursor slurry is spread quickly and evenly on the filter plate 11. Then the agitator 21 is raised to detach from the precursor slurry.

[0054] Compressed air is introduced into the tank 1 through the air inlet 17 to filter the precursor slurry, so that the water in the precursor slurry passes through the filter plate 11.

[0055] Dilute alkali is sprayed into the tank 1 through the washing component 3, and the drive motor 26 is started so that the stirring paddle 21 stirs the washing liquid above the precursor particles. After stirring for a period of time, the stirring paddle 21 moves downward a certain distance and continues to stir for a period of time. The above operation is repeated until the precursor particles are broken up and stirring continues for a period of time.

[0056] The agitator 21 is raised to the point of separation from the washing liquid, and compressed air is introduced into the tank 1 through the air inlet 17 to filter the washing liquid suspension containing precursor particles by pressure filtration, so that the washing liquid passes through the filter plate 11.

[0057] Pure water is sprayed into the tank 1 through the washing component 3, and the drive motor 26 is started so that the stirring paddle 21 stirs the pure water for washing above the precursor particles. After stirring for a period of time, the stirring paddle 21 moves downward a certain distance and continues to stir for a period of time. The above operation is repeated until the precursor particles are broken up and stirring continues for a period of time.

[0058] The stirring paddle 21 is raised to detach from the washing liquid, and the washing assembly 3 continues to spray pure water to wash the stirring assembly 2. Then, compressed air is introduced into the tank 1 through the air inlet 17 to filter the suspension containing precursor particles to form a filter cake, and water is passed through the filter plate 11.

[0059] Open the discharge valve 16 and scoop out the filter cake in the tank 1 through the discharge port 15 to complete the washing of the precursor particles.

[0060] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A washing apparatus characterized by comprising: include: Tank (1), a filter plate (11) is provided inside the tank (1), the material to be washed is located on the filter plate (11), and the tank (1) is connected to a feed pipe (12); A stirring assembly (2) includes a stirring paddle (21), which is rotatably disposed inside the tank (1) and located above the filter plate (11). The stirring paddle (21) is capable of moving up and down inside the tank (1). A washing assembly (3) is disposed inside the tank (1) and above the agitator (21), the washing assembly (3) being configured to provide washing liquid into the tank (1).

2. The washing apparatus according to claim 1, characterized by When the stirring paddle (21) stops rotating, the stirring paddle (21) is located above the material.

3. The washing apparatus according to claim 1, wherein The stirring assembly (2) also includes a stirring scraper (22), which is connected to the stirring paddle (21) and extends downward. The stirring scraper (22) can abut against the filter plate (11) and scrape the filter plate (11).

4. The washing apparatus according to claim 3, characterized by The stirring assembly (2) includes a plurality of stirring scrapers (22), and the plurality of stirring scrapers (22) are arranged at radial intervals along the stirring paddle (21).

5. The washing apparatus according to claim 3, wherein The stirring scraper (22) includes a scraper section, which is elastic and can switch between a free state and a scraper state. The scraper section is in the free state when it is above the filter plate (11), and in the scraper state when it is in contact with the filter plate (11).

6. The washing apparatus according to claim 5, wherein The stirring assembly (2) includes a plurality of stirring scrapers (22). When the scraper is in the scraper state, the stirring scraper (22) has a scraping range, and the scraping range of the plurality of stirring scrapers (22) completely covers the surface of the filter disc (11).

7. The washing apparatus according to claim 1, wherein The stirring assembly (2) also includes a mounting base (23), a lifting drive (24), and a transmission shaft (25). The mounting base (23) is equipped with a drive motor (26). The transmission shaft (25) passes through the tank (1). One end of the transmission shaft (25) is connected to the stirring paddle (21), and the other end of the transmission shaft (25) is connected to the output shaft of the drive motor (26). The lifting drive (24) is located on the tank (1) and can drive the mounting base (23) to rise and fall.

8. The washing apparatus according to claim 1, wherein The washing assembly (3) includes an annular spray pipe (31) and a connecting pipe (32). The connecting pipe (32) is connected to the annular spray pipe (31) and extends out of the tank (1). The annular spray pipe (31) is provided with a plurality of spray heads (33) at intervals.

9. The washing apparatus according to claim 1, wherein The tank (1) has a discharge port (15) on its side wall. A discharge valve (16) is provided at the discharge port (15). The lowest point of the discharge port (15) is higher than the upper surface of the filter plate (11) or the lowest point of the discharge port (15) is at the same height as the upper surface of the filter plate (11).

10. The washing apparatus according to claim 1, wherein The washing device also includes a level gauge (14) configured to detect the liquid level in the tank (1).

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