Efficient pulping system with defoaming function

Abstract

The utility model relates to an efficient pulping system with a defoaming function, which comprises a dispersion machine, the side wall surface of the dispersion machine is provided with a total discharge port and a total feed port which are arranged at an interval, and the total discharge port is connected with a feed port of a first circulating tank through a first circulating main pipe; a discharge port of the first circulating tank is connected with a main feed port through a second circulating main pipe, a first vacuum port is formed in the first circulating tank, and a second vacuum port is formed in the second circulating tank; a first circulation branch pipe is installed on the first circulation main pipe in a matched mode, one end of the first circulation branch pipe is connected with a feeding port of the second circulation tank, a second circulation branch pipe is installed on the second circulation main pipe in a matched mode, and one end of the second circulation branch pipe is connected with a discharging port of the second circulation tank. By arranging the first circulating tank and the second circulating tank, the defoaming action can be fused into a conventional homogenizing process, so that the process takt is saved, the production process is compact, the production time is shortened, and the production efficiency and the defoaming efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery slurry preparation technology, and in particular to a high-efficiency slurry preparation system with degassing function. Background Technology

[0002] The slurry preparation system is used to prepare lithium battery slurry. It can uniformly disperse positive and negative electrode active material powders, conductive agent powders, polymer binders, and additives in a solvent to form a stable suspension slurry. Air bubbles present in the slurry can alter the rheological properties of the suspension, leading to instability. This instability can cause defects such as pinholes during subsequent coating processes, affecting product quality.

[0003] In the existing technology, degassing is performed by a vacuum degassing machine after homogenization. However, using an additional degassing machine for degassing will increase the production process, lengthen the production time, and reduce production efficiency. Utility Model Content

[0004] To address the shortcomings of existing production technologies, the applicant provides a high-efficiency pulping system with defoaming function. By setting up a first circulation tank and a second circulation tank, the defoaming action can be integrated into the conventional homogenization process, saving process time, streamlining the production flow, reducing production time, and improving production efficiency and defoaming efficiency.

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

[0006] A high-efficiency pulping system with degassing function includes a disperser. The side wall of the disperser has a main discharge port and a main feed port arranged at intervals from top to bottom. The main discharge port is connected to the feed port of a first circulation tank through a first circulation main pipe. The discharge port of the first circulation tank is connected to the main feed port through a second circulation main pipe. A first vacuum port is opened on the first circulation tank, and a second vacuum port is opened on the second circulation tank.

[0007] A first circulation branch pipe is installed on the first circulation main pipe, one end of which is connected to the inlet of the second circulation tank. A second circulation branch pipe is installed on the second circulation main pipe, one end of which is connected to the outlet of the second circulation tank.

[0008] As a further improvement to the above technical solution:

[0009] The disperser has a powder inlet on its top wall, and a feeding module for feeding powder raw materials is installed at the powder inlet.

[0010] The feeding module includes a hopper for storing powder raw materials. The outlet of the hopper is connected to the powder inlet through a discharge pipe, and a feeding butterfly valve is installed on the discharge pipe.

[0011] A weighing sensor is installed on the hopper.

[0012] A rotor pump is installed on the second circulation main pipe.

[0013] A first feed valve is installed on the first main circulation pipe, a second feed valve is installed on the first branch circulation pipe, a first discharge valve is installed on the second main circulation pipe, and a second discharge valve is installed on the second branch circulation pipe.

[0014] Vacuum valves are installed on both the first and second vacuum ports.

[0015] The first circulation tank has a first vacuum breaking port, and the second circulation tank has a second vacuum breaking port.

[0016] Both the first and second vacuum breaking ports are equipped with breathing valves.

[0017] The second circulation main pipe is equipped with a discharge branch pipe, and the discharge branch pipe is equipped with a finished product discharge valve.

[0018] The beneficial effects of this utility model are as follows:

[0019] This utility model has a compact and reasonable structure and is easy to operate. By setting up a first circulation tank, a second circulation tank, a disperser and corresponding connecting pipelines, it can integrate slurry defoaming into the pulping cycle step, thereby saving process cycle time and improving lithium battery pulping efficiency. At the same time, the vacuum environment inside the pulping system can remove air bubbles in the slurry while circulating, dispersing and stirring, effectively improving defoaming efficiency.

[0020] This utility model also has the following advantages:

[0021] This invention enables the pulping system to operate in both single-cycle and dual-cycle modes by setting up a first circulation tank, a second circulation tank, a disperser, and corresponding connecting pipelines. In single-cycle mode, the first circulation tank is under slight negative pressure. In dual-cycle mode, the first and second circulation tanks are alternately under negative pressure. This ensures that the pulping system is in a vacuum environment after the feed butterfly valve is closed, which facilitates defoaming of the pulp and prevents bubble growth.

[0022] This invention, by setting up a first circulation tank and a second circulation tank, can stir the slurry inside them at a set speed in a dual-circulation working mode. When stirring at high speed, it can remove the existing air bubbles in the slurry. When stirring at low speed, it can prevent the slurry from carrying air bubbles into the slurry during rapid convection. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the present invention in its working state. Figure 1 .

[0025] Figure 3 This is a schematic diagram of the present invention in its working state. Figure 2 .

[0026] Figure 4 This is a schematic diagram of the present invention in its working state. Figure 3 .

[0027] The components include: 1. First circulation tank; 2. Second circulation tank; 3. First discharge valve; 4. Second discharge valve; 5. Disperser; 6. First feed valve; 7. Second feed valve; 8. Vacuum valve; 9. Feeding module; 10. Rotary pump; 11. First circulation main pipe; 12. Second circulation main pipe; 13. First circulation branch pipe; 14. Second circulation branch pipe; 15. Discharge branch pipe; 16. Finished product discharge valve; 17. Breathing valve;

[0028] 901. Hopper; 902. Material discharge pipe; 903. Feed butterfly valve; 904. Weighing sensor. Detailed Implementation

[0029] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0030] The structure and function of this utility model are as follows:

[0031] like Figure 1 As shown, the high-efficiency pulping system with degassing function in this embodiment includes a disperser 5. The side wall of the disperser 5 is provided with a main discharge port and a main feed port arranged at intervals from top to bottom. The main discharge port is connected to the feed port of the first circulation tank 1 through a first circulation main pipe 11. The discharge port of the first circulation tank 1 is connected to the main feed port through a second circulation main pipe 12. A first vacuum port is provided on the first circulation tank 1, and a second vacuum port is provided on the second circulation tank 2. A first circulation branch pipe 13 is installed on the first circulation main pipe 11, and one end of the first circulation branch pipe 13 is connected to the feed port of the second circulation tank 2. A second circulation branch pipe 14 is installed on the second circulation main pipe 12, and one end of the second circulation branch pipe 14 is connected to the discharge port of the second circulation tank 2. This invention, by setting up a first circulation tank 1 and a second circulation tank 2, allows the slurry to circulate alternately between the first circulation tank 1, the disperser 5, and the second circulation tank 2, thereby fully dispersing and mixing the slurry; by setting up a first vacuum port and a second vacuum port, vacuum can be drawn into the first circulation tank 1 and the second circulation tank 2 respectively, so that degassing can be performed simultaneously during the slurry circulation and homogenization process, simplifying the production process and improving production efficiency.

[0032] The disperser 5 has a powder inlet on its top wall, and a feeding module 9 for feeding powder raw materials is installed at the powder inlet. The feeding module 9 includes a hopper 901 for storing powder raw materials. The outlet of the hopper 901 is connected to the powder inlet through a discharge pipe 902, and a feeding butterfly valve 903 is installed on the discharge pipe 902. The feeding butterfly valve 903 controls the opening and closing of the discharge channel 902.

[0033] A weighing sensor 904 is installed on the silo 901. The weighing sensor 904 is a pressure-type weighing sensor, which is used to monitor the amount of powder raw material inside the silo 901 in real time.

[0034] A rotor pump 10 is installed on the second circulation main pipe 12. The rotor pump 10 is used to drive the flow of slurry inside the pulping system.

[0035] A first feed valve 6 is installed on the first circulation main pipe 11, a second feed valve 7 is installed on the first circulation branch pipe 13, a first discharge valve 3 is installed on the second circulation main pipe 12, and a second discharge valve 4 is installed on the second circulation branch pipe 14. The first feed valve 6 controls whether the slurry in the disperser 5 flows into the first circulation tank 1; the second feed valve 7 controls whether the slurry in the first circulation main pipe 11 flows into the second circulation tank 2, and the connection point between the first circulation branch pipe 13 and the first circulation main pipe 11 is located between the first feed valve 6 and the second feed valve 7; the first discharge valve 3 controls whether the slurry in the first circulation tank 1 flows into the disperser 5; the second discharge valve 4 controls whether the slurry in the second circulation tank 2 flows into the second circulation main pipe 12, and the connection point between the second circulation branch pipe 14 and the second circulation main pipe 12 is located between the first discharge valve 3 and the second discharge valve 4.

[0036] Vacuum valves 8 are installed on both the first and second vacuum ports. The first vacuum port is connected to the vacuum source through a first vacuum tube, and the second vacuum port is connected to the vacuum source through a second vacuum tube. Vacuum valves 8 are used to control the on / off state of the corresponding vacuum tubes.

[0037] The first circulation tank 1 has a first vacuum breaking port, and the second circulation tank 2 has a second vacuum breaking port; both the first and second vacuum breaking ports are equipped with breather valves 17. By setting the first and second vacuum breaking ports, the corresponding circulation tanks can be vacuumed, and after vacuum breaking, the slurry can flow out easily.

[0038] A discharge branch pipe 15 is installed on the second circulation main pipe 12, and a finished product discharge valve 16 is installed on the discharge branch pipe 15. One end of the discharge branch pipe 15 is connected to the finished product storage tank, and the finished product discharge valve 16 is used to control the opening and closing of the discharge branch pipe 15, so that the prepared pulp can be transported to the finished product storage tank after pulping is completed.

[0039] In this invention, both the first circulation tank 1 and the second circulation tank 2 are coating tanks, and both are equipped with stirring paddles that can rotate under the drive of an external motor, thereby stirring and dispersing the materials inside the tank.

[0040] In this invention, the raw materials for preparing the slurry include powder raw materials and liquid raw materials. The main feed port on the disperser 5 is used for feeding the liquid raw materials and for feeding the slurry into the second circulation main pipe 12 during subsequent cycles.

[0041] In this utility model, the first circulation main pipe 11, the second circulation main pipe 12, the first circulation branch pipe 13, the second circulation branch pipe 14, the discharge branch pipe 15, the first vacuum pipe, and the second vacuum pipe can all be formed by splicing several short pipes or by using long pipes, depending on the specific usage and installation requirements. In addition, each pipe is equipped with a corresponding control valve assembly, which is configured according to the actual production requirements.

[0042] The working process of this utility model is as follows:

[0043] The liquid raw materials used to prepare the slurry are stored in the first circulation tank 1;

[0044] First, the pulping system adopts a single-cycle mode, such as... Figure 2 As shown, in this mode, the feed butterfly valve 903 is open, the first discharge valve 3 is open, the second discharge valve 4 is closed, the first feed valve 6 is open, and the second feed valve 7 is closed. The first circulation tank 1 is evacuated through the first vacuum port until the vacuum degree inside reaches about -20KPa, and the slight negative pressure inside the first circulation tank 1 is maintained.

[0045] Start the rotor pump 10 and feed liquid raw materials into the disperser 5 through the main feed port. Feed module 9 feeds powder raw materials into the disperser 5 through the powder inlet. The disperser 5 stirs, mixes, shears, and disperses the liquid and powder raw materials to obtain a slurry.

[0046] Meanwhile, under the action of the rotor pump 10, the slurry in the disperser 5 enters the first circulation tank 1 through the first circulation pipe 11, and then flows back to the disperser 5 through the second circulation pipe 12, so that the slurry circulates between the disperser 5 and the first circulation tank 1 until the powder raw material feeding is completed.

[0047] Subsequently, the feed butterfly valve 903 is closed, and the pulping system enters the dual circulation mode, which includes two stages;

[0048] like Figure 3As shown, in the first stage of the dual-circulation mode, the first discharge valve 3 is opened, the second discharge valve 4 is closed, the first feed valve 6 is closed, the second feed valve 7 is opened, the breather valve 17 installed on the first vacuum breaking port is opened to break the vacuum of the first circulation tank 1, and the second circulation tank 2 is evacuated through the second vacuum port until the internal environmental pressure of the second circulation tank 2 reaches the set vacuum degree (about -80KPa), and the vacuum state inside the second circulation tank 2 is maintained.

[0049] Under the action of the rotor pump 10, the slurry in the first circulation tank 1 enters the disperser 5 through the second circulation main pipe 12, and the slurry in the disperser 5 enters the second circulation tank 2 through the first circulation main pipe 11 and the first circulation branch pipe 13. At the same time, the stirring paddle in the first circulation tank 1 rotates at a low speed (0-300 rpm) to disperse the slurry at a low speed, and the stirring paddle in the second circulation tank 2 rotates at a high speed (500-1000 rpm) to disperse the slurry at a high speed.

[0050] The first stage of the dual circulation mode is completed when all the slurry in the first circulation tank 1 is transferred to the second circulation tank 2.

[0051] Then, as Figure 4 As shown, the pulping system enters the second stage of the dual circulation mode. The first discharge valve 3 is closed, the second discharge valve 4 is opened, the first feed valve 6 is opened, the second feed valve 7 is closed, and the breather valve 17 installed on the second vacuum breaking port is opened to break the vacuum in the second circulation tank 2. The first circulation tank 1 is evacuated through the first vacuum port until the internal environmental pressure of the first circulation tank 1 reaches the preset vacuum degree (about -80KPa) and the vacuum state inside the second circulation tank 1 is maintained.

[0052] Under the action of the rotor pump 10, the slurry in the second circulation tank 2 enters the disperser 5 through the second circulation branch pipe 14 and the second circulation main pipe 12. The slurry in the disperser 5 enters the first circulation tank 1 through the first circulation main pipe 11. At the same time, the stirring paddle in the first circulation tank 1 rotates at high speed (500-1000 rpm) to disperse the slurry at high speed, while the stirring paddle in the second circulation tank 2 rotates at low speed (0-300 rpm) to disperse the slurry at low speed.

[0053] The second stage of the dual circulation mode is completed when all the slurry in the second circulation tank 2 is transferred to the first circulation tank 1.

[0054] In dual-circulation mode, alternating cycles of 1-100 times can simultaneously complete the dispersion, mixing, and degassing of the slurry.

[0055] Finally, the finished product discharge valve 16 is opened, and the prepared slurry is transferred to the finished product storage tank for storage through the discharge branch pipe 15.

[0056] 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 high-efficiency pulping system with defoaming function, comprising a disperser (5), wherein the side wall of the disperser (5) is provided with a main discharge port and a main feed port arranged at intervals from top to bottom, characterized in that: The main outlet is connected to the inlet of the first circulation tank (1) through the first circulation main pipe (11), the outlet of the first circulation tank (1) is connected to the main inlet through the second circulation main pipe (12), the first circulation tank (1) has a first vacuum port, and also includes a second circulation tank (2), the second circulation tank (2) has a second vacuum port; A first circulation branch pipe (13) is installed on the first circulation main pipe (11), one end of the first circulation branch pipe (13) is connected to the inlet of the second circulation tank (2), and a second circulation branch pipe (14) is installed on the second circulation main pipe (12), one end of the second circulation branch pipe (14) is connected to the outlet of the second circulation tank (2).

2. The high-efficiency pulping system with defoaming function as described in claim 1, characterized in that: The disperser (5) has a powder inlet on its top wall, and a feeding module (9) for feeding powder raw materials is installed at the powder inlet.

3. The high-efficiency pulping system with defoaming function as described in claim 2, characterized in that: The feeding module (9) includes a hopper (901) for storing powder raw materials. The outlet of the hopper (901) is connected to the powder inlet through a discharge pipe (902). A feeding butterfly valve (903) is installed on the discharge pipe (902).

4. The high-efficiency pulping system with defoaming function as described in claim 3, characterized in that: A weighing sensor (904) is installed on the hopper (901).

5. The high-efficiency pulping system with defoaming function as described in claim 1, characterized in that: A rotor pump (10) is installed on the second circulation main pipe (12).

6. The high-efficiency pulping system with defoaming function as described in claim 1, characterized in that: A first feed valve (6) is installed on the first circulation main pipe (11), a second feed valve (7) is installed on the first circulation branch pipe (13), a first discharge valve (3) is installed on the second circulation main pipe (12), and a second discharge valve (4) is installed on the second circulation branch pipe (14).

7. The high-efficiency pulping system with defoaming function as described in claim 1, characterized in that: Vacuum valves (8) are installed on both the first and second vacuum ports.

8. The high-efficiency pulping system with defoaming function as described in claim 1, characterized in that: The first circulation tank (1) has a first vacuum breaking port, and the second circulation tank (2) has a second vacuum breaking port.

9. The high-efficiency pulping system with defoaming function as described in claim 8, characterized in that: Both the first and second vacuum breaking ports are equipped with a breather valve (17).

10. The high-efficiency pulping system with defoaming function as described in claim 1, characterized in that: The second circulation main pipe (12) is fitted with a discharge branch pipe (15), and the discharge branch pipe (15) is fitted with a finished product discharge valve (16).

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