Circulating tank device with defoaming function

Abstract

The utility model relates to a circulation tank device with a defoaming function. The circulation tank device comprises a tank body, an upper sealing head is installed on the top of the tank body in a matched mode, a first feeding port used for feeding slurry is formed in the upper sealing head, a first feeding pipe is installed in the first feeding port in a matched mode, a discharging port is formed in the bottom of the tank body, and a lower end cover is installed at the discharging port in a sealed mode. A liquid receiving disc is fixed on the inner side wall surface of the tank body, the liquid receiving disc is located below the discharging end of the first feeding pipe, the top of the liquid receiving disc is hollowed out, so that a liquid storage space is formed, at least one first gap is formed in the inner bottom wall surface of the liquid storage space, and slurry in the liquid storage space flows out through the first gap under the action of gravity, so that a waterfall-shaped slurry bundle is formed. According to the slurry defoaming device, slurry defoaming action can be carried out while slurry is circularly stirred and dispersed, so that the defoaming action is fused into a slurry homogenizing process, the production takt is compact, and the defoaming and production efficiency is improved; meanwhile, defoaming is carried out by forming thin-layer slurry, the defoaming efficiency is high, and the defoaming effect is good.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery slurry preparation technology, and in particular to a circulating tank device with degassing function. Background Technology

[0002] In the lithium battery manufacturing process, the slurry preparation stage is crucial to the battery's performance and final quality. Lithium battery slurry is prepared by uniformly dispersing positive and negative electrode active material powders, conductive agent powders, polymer binders, and additives in a solvent to form a stable suspension. Air bubbles present in the slurry can alter the rheological properties of the suspension, leading to instability and potentially causing coating defects such as pinholes in subsequent coating processes.

[0003] In existing technologies, a degassing machine is typically used to degas the slurry after homogenization. However, this degassing method has low degassing efficiency, usually requiring multiple cycles to meet the degassing requirements, resulting in a longer overall homogenization cycle time and affecting production efficiency. At the same time, this degassing method cannot completely remove air bubbles from the slurry, resulting in incomplete degassing. Utility Model Content

[0004] To address the shortcomings of the existing production technology, the applicant provides a circulating tank device with defoaming function, which can perform defoaming of the slurry while circulating, stirring and dispersing it, thereby integrating the defoaming action into the homogenization process, tightening the production cycle, and improving defoaming and production efficiency; at the same time, by forming a thin layer of slurry for defoaming, it has high defoaming efficiency and good defoaming effect.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A circulating tank device with degassing function includes a tank body, an upper end cap is fitted on the top of the tank body, a first inlet for slurry feeding is opened on the upper end cap, a first feed pipe is fitted in the first inlet, and an outlet is opened at the bottom of the tank body, with a lower end cap sealed at the outlet.

[0007] A liquid receiving tray is fixed on the inner wall of the tank. The liquid receiving tray is located below the discharge end of the first feed pipe. The top of the liquid receiving tray is hollowed out to form a liquid storage space. At least one first slit is opened on the inner bottom wall of the liquid storage space.

[0008] When the slurry enters the interior of the tank through the first feed pipe, it first flows into the liquid storage space. Then, the slurry in the liquid storage space flows out through the first gap under the action of gravity, thus forming a waterfall-shaped slurry stream.

[0009] As a further improvement to the above technical solution:

[0010] The first feed pipe has the following structure: it includes a straight pipe, the outlet end of the straight pipe is connected to an elbow pipe, and the feed end of the straight pipe is fitted with a connector.

[0011] The bending angle of the elbow is 0°-90°.

[0012] The discharge end of the elbow is arranged at an angle toward the inner wall of the tank.

[0013] The top end face of the liquid receiving tray is provided with an outwardly extending slurry plate.

[0014] At least one second slit is provided on the end face of the slurry plate.

[0015] The upper end cap is also provided with a second inlet for feeding liquid raw materials, and a second feed pipe is installed in the second inlet.

[0016] A jacket is fitted onto the outer wall of the tank, and the jacket is spaced apart from the tank, so that a cooling space is formed between the inner wall of the jacket and the outer wall of the tank. Coolant circulates in the cooling space, and the coolant cools the slurry inside the tank.

[0017] An insulation layer is attached to the outer wall of the jacket.

[0018] An agitator is fitted inside the tank.

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

[0020] This utility model has a compact and reasonable structure and is easy to operate. By setting a first feed pipe and a liquid receiving tray located below the first feed pipe, a waterfall-like slurry can be formed in the tank during circulating pulping, thereby performing defoaming action while circulating pulping, tightening the production cycle and improving production efficiency. At the same time, the thin layer of slurry can facilitate the separation and overflow of air bubbles in the slurry, resulting in high defoaming efficiency and good defoaming effect.

[0021] This utility model also has the following advantages:

[0022] (1) By setting the first gap and the second gap, this utility model can make the high-speed flowing slurry into a thinner slurry bundle when it flows out of the liquid receiving tray, which is beneficial to the separation of bubbles.

[0023] (2) By setting a slurry plate, the feeding speed of the slurry can be slightly greater than the speed at which the slurry flows out of the receiving tray through the first gap, thereby further improving production efficiency.

[0024] (3) By setting up an elbow pipe in this utility model, the high-speed flowing slurry can first hit the inner side wall of the tank and then flow into the receiving tray, preventing the slurry from directly hitting the inner bottom wall of the receiving tray, thereby playing a buffering role when the slurry is fed and avoiding slurry splashing.

[0025] (4) The present invention has a compact structure. The liquid receiving tray can be integrated with the tank body or fixed inside the tank body by welding. It is simple to manufacture and can effectively control costs.

[0026] (5) By setting a jacket, coolant can be introduced into the present invention, so that the temperature of the slurry inside the tank can be kept stable during the pulping process, thereby improving the pulping quality. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model.

[0028] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0029] Figure 3 for Figure 2 Top view of the central liquid receiving tray.

[0030] Figure 4 This is a cross-sectional view of another structural form of the liquid receiving tray in this utility model.

[0031] Figure 5 for Figure 4 Top view of the central liquid receiving tray.

[0032] Figure 6 This is a schematic diagram of the structure of the first feed pipe in this utility model.

[0033] The components are: 1. Tank body; 2. Upper end cap; 3. Discharge port; 4. Agitator; 5. First feed pipe; 6. Second feed pipe; 7. Jacket; 8. Lower end cover; 9. Liquid receiving tray; 10. Slurry plate; 11. First gap; 12. Second gap; 13. Liquid storage space;

[0034] 501. Straight pipe; 502. Elbow pipe; 503. Connector. Detailed Implementation

[0035] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0036] The structure and function of this utility model are as follows:

[0037] like Figures 1-6As shown, a circulating tank device with degassing function includes a tank body 1. An upper end cap 2 is installed on the top of the tank body 1. A first inlet for slurry feeding is opened on the upper end cap 2. A first feed pipe 5 is installed inside the first inlet. An outlet 3 is opened at the bottom of the tank body 1. A lower end cap 8 is sealed at the outlet 3. A liquid receiving tray 9 is fixed on the inner wall of the tank body 1. The liquid receiving tray 9 is located below the outlet end of the first feed pipe 5. The top of the liquid receiving tray 9 is hollowed out to form a liquid storage space 13. At least one first slit 11 is opened on the inner bottom wall of the liquid storage space 13. When the slurry enters the interior of the tank body 1 through the first feed pipe 5, it first flows into the liquid storage space 13. Then, the slurry in the liquid storage space 13 flows out through the first slit 11 under the action of gravity, thereby forming a waterfall-shaped slurry stream. By setting up a liquid receiving tray 9 and a first feed pipe 5, this utility model enables the slurry flowing out of the liquid storage space 13 to form a thin layer of slurry with the same shape as the first gap 11, thereby facilitating the separation and overflow of air bubbles from the thin layer of slurry. Defoaming is performed while circulating the slurry, and the defoaming effect is good, effectively improving the slurry making efficiency.

[0038] like Figure 6 As shown, the structure of the first feed pipe 5 is as follows: it includes a straight pipe 501, the outlet end of the straight pipe 501 is connected to an elbow pipe 502, and the feed end of the straight pipe 501 is fitted with a connector 503. In this utility model, the first feed pipe 5 is used for feeding pulp during the circulating pulping stage, and the connector 503 is used for connecting to an external conveying pipeline.

[0039] The bending angle of the elbow pipe 502 is 0°-90°, and the discharge end of the elbow pipe 502 is inclined towards the inner wall of the tank body 1. By setting the elbow pipe 502, the slurry can first hit the inner wall of the tank body 1 when it enters the tank body 1 through the first feed pipe 5 and then bounce into the liquid storage space 13, preventing the slurry from directly hitting the inner bottom wall of the liquid receiving tray 9, thus playing a buffering role when the slurry is fed and avoiding slurry splashing.

[0040] The top end face of the receiving tray 9 is provided with an outwardly extending slurry plate 10, and at least one second slit 12 is opened on the end face of the slurry plate 10. In this utility model, by providing the first slit 11 and the second slit 12, the slurry can be made to form a thin layer of slurry with the same shape as the corresponding slit when it flows out from the corresponding slit, thereby forming a waterfall-like slurry bundle to facilitate the separation of air bubbles from the slurry;

[0041] In addition, to improve production efficiency, multiple first gaps 11 and multiple second gaps 12 can be set.

[0042] The pulp conveying plate 10 is a flat plate with its top end face flush with the top end face of the liquid receiving tray 9. It can serve as an extension of the top end face of the liquid receiving tray 9. The pulp conveying plate 10 can further prevent pulp from overflowing from the liquid receiving tray 9 and can accelerate the pulp outflow efficiency, thereby further improving the pulping efficiency.

[0043] The upper end cap 2 is also provided with a second inlet for feeding liquid raw materials, and a second feed pipe 6 is installed in the second inlet. The second feed pipe 6 is used to feed the liquid raw materials for preparing the slurry.

[0044] A jacket 7 is fitted onto the outer wall of the tank body 1, with the jacket 7 spaced apart from the tank body 1. This creates a cooling space between the inner wall of the jacket 7 and the outer wall of the tank body 1. Coolant circulates within this cooling space, cooling the slurry inside the tank body 1. Chilled water can be used as the coolant to maintain a stable temperature of the slurry inside the tank body 1 during the pulping process, thereby improving the pulping quality.

[0045] An insulation layer is attached to the outer wall of the jacket 7. The insulation layer can improve the heat exchange efficiency of the coolant.

[0046] A stirring paddle 4 is installed inside the tank body 1. The stirring paddle 4 is connected to the output shaft of the pulping machine. One end of the output shaft of the pulping machine is connected to an external drive motor, and the other end extends through the upper end cap 2 into the interior of the tank body 1 and is connected to the stirring paddle 4. The external drive motor drives the output shaft to rotate, thereby driving the stirring paddle 4 to rotate, and then the stirring paddle 4 mixes and disperses the slurry inside the tank body 1.

[0047] The upper end cap 2 is installed by rotating the sealing assembly and engaging with the outer circumferential surface of the output shaft. In addition, the upper end cap 2, or the tank body 1, has several third feed ports for feeding separate raw materials for preparing slurry.

[0048] The working process of this utility model is as follows:

[0049] In the initial pulping stage, powder raw materials enter the tank 1 through the third feed port, and liquid raw materials enter the tank 1 through the second feed pipe 6. Then, the external drive motor drives the output shaft to rotate, thereby driving the stirring paddle 4 to rotate, and thus stirring and mixing the powder raw materials and liquid raw materials inside the tank 1 to prepare a slurry.

[0050] To improve the quality of the slurry, it is necessary to circulate the slurry. During the circulating slurry stage, the lower end cap 8 is removed, and the outlet 3 is connected to the inlet end of the external container through the first conveying pipe group. The outlet pipe of the external container is connected to the inlet end of the first inlet pipe 5 through the second conveying pipe group.

[0051] The slurry inside the tank 1 is continuously stirred, sheared and dispersed by the stirring paddle 4. The slurry inside the tank 1 enters the container through the outlet 3 and the first conveying pipe group in sequence. Then the slurry in the container returns to the inside of the tank 1 through the second conveying pipe group and the first feed pipe 5 in sequence, thus forming a circulating slurry production.

[0052] When the slurry flows back into the tank 1 through the first feed pipe 5, the slurry first collides with the inner wall of the tank 1 through the discharge end of the elbow pipe 502, and then bounces back and falls into the storage space 13 at the top of the receiving tray 9. Then, under the action of gravity, the slurry in the receiving tray 9 flows downward through each gap (including the first gap 11 and the second gap 12), thereby forming a waterfall-shaped slurry, which becomes a thin layer of slurry with the same shape as the corresponding gap. This can increase the contact area between the slurry and the vacuum environment inside the tank 1, and is more conducive to the separation and overflow of bubbles from the slurry.

[0053] To improve the degassing effect, it is necessary to ensure that the flow rate of the slurry entering the tank 1 is less than or equal to the flow rate of the slurry in the storage space 13 through the first gap 11, or to ensure that the flow rate of the slurry entering the tank 1 is slightly greater than the flow rate of the slurry in the storage space 13 through the first gap 11. In this case, the slurry overflowing from the storage space 13 will flow into the tank 1 below the receiving tray 9 through the second gap 12 opened on the slurry plate 10.

[0054] In addition, a valve can be installed at the discharge port 3 to close the valve when the lower end cover 8 is removed, thereby preventing the slurry inside the tank 1 from leaking when the pipeline is connected.

[0055] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A circulating tank device with degassing function, characterized in that: The tank includes a tank body (1), with an upper end cap (2) installed on the top of the tank body (1). A first inlet for slurry feeding is opened on the upper end cap (2), and a first feed pipe (5) is installed in the first inlet. An outlet (3) is opened at the bottom of the tank body (1), and a lower end cap (8) is sealed at the outlet (3). A liquid receiving tray (9) is fixed on the inner wall of the tank (1). The liquid receiving tray (9) is located below the discharge end of the first feed pipe (5). The top of the liquid receiving tray (9) is hollowed out to form a liquid storage space (13). At least one first slit (11) is opened on the inner bottom wall of the liquid storage space (13). When the slurry enters the interior of the tank (1) through the first feed pipe (5), it first flows into the liquid storage space (13), and then the slurry in the liquid storage space (13) flows out through the first gap (11) under the action of gravity, thereby forming a waterfall-shaped slurry bundle.

2. The circulating tank device with defoaming function as described in claim 1, characterized in that: The structure of the first feed pipe (5) is as follows: it includes a straight pipe (501), the discharge end of the straight pipe (501) is connected to an elbow pipe (502), and the feed end of the straight pipe (501) is fitted with a connector (503).

3. The circulating tank device with defoaming function as described in claim 2, characterized in that: The bending angle of the elbow (502) is 0°-90°.

4. The circulating tank device with defoaming function as described in claim 2, characterized in that: The discharge end of the elbow (502) is arranged at an inclination toward the inner wall of the tank (1).

5. A circulating tank device with defoaming function as described in claim 1, characterized in that: The top end face of the liquid receiving tray (9) is provided with an outwardly extending slurry plate (10).

6. A circulating tank device with defoaming function as described in claim 5, characterized in that: At least one second slit (12) is provided on the end face of the slurry plate (10).

7. A circulating tank device with defoaming function as described in claim 1, characterized in that: The upper end cap (2) is also provided with a second inlet for feeding liquid raw materials, and a second feed pipe (6) is installed in the second inlet.

8. A circulating tank device with degassing function as described in claim 1, characterized in that: A jacket (7) is fitted on the outer wall of the tank (1). The jacket (7) is spaced apart from the tank (1), so that a cooling space is formed between the inner wall of the jacket (7) and the outer wall of the tank (1). Cooling liquid circulates in the cooling space, and the slurry inside the tank (1) is cooled by the cooling liquid.

9. A circulating tank device with degassing function as described in claim 8, characterized in that: An insulation layer is attached to the outer wall of the jacket (7).

10. A circulating tank device with defoaming function as described in claim 1, characterized in that: The tank (1) is fitted with a stirring paddle (4).

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