High-solid-content circulating pulping system

Abstract

The utility model discloses a high-solid-content circulating pulping system which comprises a powder feeding system, a liquid feeding system, a multi-screw extruder and a circulating demagnetizing and dispersing system, and the discharging end of the powder feeding system and the discharging end of the liquid feeding system are respectively connected with the feeding end of the multi-screw extruder. And the discharge end of the multi-screw extruder is connected with the feed end of the circulating demagnetizer. According to the high-solid-content circulating pulping system, slurry conveying kneading and circulating demagnetizing dispersion are achieved through the multi-screw extruder and the circulating demagnetizing dispersion system, qualified slurry is produced, and the problems that a traditional homogenizing system circulating pulping system is weak in kneading effect and cannot meet the high-solid-content requirement are solved.

Description

Technical Field

[0001] The utility model relates to a high-solid content circulating pulping system, belonging to the technical field of lithium battery manufacturing. Background Art

[0002] With the development of science and technology, lithium batteries have become one of the indispensable energy sources in modern society. In the production process of lithium batteries, the homogenization process is a key step, which directly affects the performance and quality of lithium batteries. The traditional homogenization process mainly uses double planetary, twin screw or circulating pulping, but these methods have certain limitations, such as low efficiency of double planetary, large capacity twin screw, long screw length, high processing difficulty, large equipment wear; the kneading effect of circulating pulping is weak and cannot meet the high solid content. Therefore, the development of a high solid content circulating pulping system has important practical significance. Utility Model Content

[0003] The utility model aims to overcome the deficiencies in the prior art and provide a high-solid content circulating pulping system to solve the problem that the kneading effect of the traditional homogenizing system circulating pulping system is weak and cannot meet the high solid content requirement.

[0004] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0005] The utility model provides a high-solid content circulating pulping system, comprising a powder feeding system, a liquid feeding system, a multi-screw extruder and a circulating demagnetization dispersion system, wherein the discharge ends of the powder feeding system and the liquid feeding system are respectively connected to the feed ends of the multi-screw extruder, and the discharge end of the multi-screw extruder is connected to the feed end of the circulating demagnetization.

[0006] Furthermore, the powder feeding system includes a plurality of groups of powder storage tanks, the discharge ports of the powder storage tanks are connected to a powder mixing bin, and the discharge port of the powder mixing bin is connected to a multi-screw extruder.

[0007] Furthermore, the discharge port of the powder storage tank is provided with a metering tank or the powder storage tank is a tank with a self-contained metering function.

[0008] Furthermore, the liquid feeding system comprises a liquid storage tank, the discharge port of the liquid storage tank is connected to a liquid delivery pump, and the discharge port of the liquid delivery pump is connected to a multi-screw extruder.

[0009] Furthermore, a flow meter is provided in the delivery pipeline in the liquid feed system, or the liquid delivery pump is a liquid delivery pump with a metering function.

[0010] Furthermore, the multi-screw extruder includes a screw and a driving mechanism connected to the screw, and the threaded elements on the screw include a conveying element, a kneading element and a dispersing element.

[0011] Furthermore, the multi-screw extruder is a three-screw extruder. Compared with a traditional twin-screw extruder, the three-screw extruder has a smaller aspect ratio, screw diameter and motor power than a twin-screw extruder at the same output, so the three-screw extruder has a smaller energy consumption ratio.

[0012] Furthermore, the feed port of the multi-screw extruder includes a powder feed port connected to the powder feed system and a liquid feed port connected to the liquid feed system; the driving mechanism includes a connected motor and a reducer.

[0013] Furthermore, the circulating demagnetization and dispersion system includes several circulating tanks, the discharge port of the circulating tank is connected to two discharge pipes, one of which is connected to an online dispersion pump, and the online dispersion pump is connected to the inlet of the circulating tank through a deironing device and a cooler to form a circulating demagnetization loop; the other is connected to a finished product buffer tank through a delivery pump, and the slurry is output from the pipeline after the circulation dispersion is qualified, and can be delivered to the finished product buffer tank or the next application area. The number of circulating tanks can be set according to actual needs.

[0014] Furthermore, a pre-ironing remover and a pre-buffer tank are provided between the multi-screw extruder and the circulating demagnetization dispersion system, and a delivery pump is provided in the connecting pipeline between the multi-screw extruder and the pre-ironing remover and in the connecting pipeline between the pre-buffer tank and the circulating demagnetization dispersion system.

[0015] The delivery pump described in this embodiment can select an existing pump body according to actual needs, including but not limited to a diaphragm pump, a screw pump, etc.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The high solid content circulating pulping system of the utility model realizes pulp conveying, kneading and circulating demagnetization and dispersion through a multi-screw extruder and a circulating demagnetization and dispersion system, and produces qualified pulp, thus solving the problem that the conventional homogenization system circulating pulping system has weak kneading effect and cannot meet the high solid content requirement.

[0018] The high solid content circulating pulping system of the utility model adopts a multi-screw extruder, which has a smaller aspect ratio, screw diameter and motor power under the same output and a smaller energy consumption ratio than the traditional twin-screw extruder;

[0019] The circulating demagnetization and dispersion system of the utility model adopts a circulating dispersion demagnetization method to ensure that the time for all slurries to be effectively dispersed is basically the same, thereby improving the consistency of the slurry; at the same time, an iron remover is added to the circulating pipeline to improve the demagnetization capacity without affecting the efficiency, and the demagnetization effect is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is a structural schematic diagram of a high-solid content circulating pulping system provided in Example 1 of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a three-screw extruder according to an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the circulation dispersion described in the embodiment of the utility model;

[0023] Figure 4 It is a structural schematic diagram of a high-solid content circulating pulping system provided in Example 2 of the utility model.

[0024] In the figure: 1. Powder storage tank; 2. Powder metering tank; 3. Powder mixing bin; 4. Liquid storage tank; 5. Liquid delivery pump; 6. Flow meter; 7. Three-screw extruder; 701. Motor; 702. Coupling; 703. Reducer; 704. Powder feed port; 705. Liquid feed port; 706. Slurry outlet; 707. Conveying element; 708. Kneading element; 709. Dispersing element; 8. Diaphragm pump; 9. Pre-ironing remover; 10. Pre-buffer tank; 11. Delivery pump; 12. Circulation tank A; 13. Circulation tank B; 14. Online dispersion pump; 15. Iron remover; 16. Cooler; 17. Screw pump; 18. Coating buffer tank. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0026] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0028] Example 1

[0029] This embodiment provides a high-solid content circulating pulping system, including a powder feeding system, a liquid feeding system, a three-screw extruder 7 and a circulating demagnetization and dispersion system.

[0030] like Figure 1 As shown, the powder feeding system includes three powder storage tanks 1, and the battery powder enters the powder mixing bin 3 for preliminary mixing through the powder metering tank 2 connected to the powder storage tank 1, and the outlet of the powder mixing bin 3 is connected to the powder feeding port 704 of the three-screw extruder 7 through a pipeline; the liquid feeding system includes two liquid storage tanks 4, and the liquid material is transported to the liquid feeding port 705 provided on the three-screw extruder 7 through the liquid storage tank 4 and the liquid delivery pump 5 through the pipeline, and a flow meter 6 is provided on the delivery pipeline to measure the liquid feeding amount; the amount of powder and liquid can be increased or decreased according to the battery formula.

[0031] like Figure 2 As shown, in this embodiment, the three-screw extruder 7 is connected by a screw and a reducer 703, and the motor 703 is connected to the reducer 703 through a coupling 702, so as to control the screw speed; at the same time, the three screws are composed of three kinds of threaded elements, namely a conveying element 707, a kneading element 708 and a dispersing element 709, and the arrangement order and quantity can be adjusted according to the battery formula; the slurry coming out of the three-screw extruder 7 is connected to the diaphragm pump 8 through a pipeline through the slurry outlet 706, and enters the pre-buffer tank 10 for cache after demagnetization by the pre-iron remover 9; the pre-buffer tank 10 is connected to the circulation tank of the circulating demagnetization and dispersion system through a pipeline, and a delivery pump 11 is provided on the pipeline for conveying the slurry.

[0032] The circulating demagnetization and dispersion system described in this embodiment includes a circulating tank A 12 and a circulating tank B 13. When the circulating tank A 12 is full, the circulating dispersion is started. Figure 3As shown, the slurry is connected to the online dispersion pump 14 through one of the discharge pipes connected to the discharge port of the circulation tank A 12, the outlet pipe of the online dispersion pump 14 is connected to the iron remover 15, the outlet pipe of the iron remover 15 is connected to the cooler 16, and the outlet of the cooler 16 is connected to the other inlet of the circulation tank A 12, forming a circulating demagnetization loop; the slurry is in a dynamic cycle during the whole process, and the demagnetization effect is further improved. At the same time, the cooler 16 maintains the temperature of the slurry after online dispersion to meet the slurry quality. The circulation tank B 13 is connected in parallel with the circulation tank A 12, and its circulation process is the same.

[0033] After the slurry circulation dispersion is qualified, another discharge pipeline connecting the discharge ports of the slurry circulation tank A 12 and the circulation tank B 13 is transported to the coating buffer tank 18 through the screw pump 17 for slurry coating.

[0034] Example 2

[0035] This embodiment provides a high-solid content circulating pulping system, including a powder feeding system, a liquid feeding system, a three-screw extruder 7 and a circulating demagnetization and dispersion system.

[0036] like Figure 4 As shown, the powder feeding system includes three powder storage tanks 1 with self-metering function. The battery powder enters the powder mixing bin 3 through the powder storage tank 1 for preliminary mixing. The outlet of the powder mixing bin 3 is connected to the powder feeding port 704 of the three-screw extruder 7 through a pipeline; the liquid feeding system includes two liquid storage tanks 4. The liquid material is transported to the liquid feeding port 705 provided on the three-screw extruder 7 through a pipeline via a liquid delivery pump 5 with self-metering function through the liquid storage tank 4. The amount of powder and liquid can be increased or decreased according to the battery formula.

[0037] like Figure 2 As shown, in this embodiment, the three-screw extruder 7 is connected by a screw and a reducer 703, and the motor 703 is connected to the reducer 703 through a coupling 702, so as to control the screw speed; at the same time, the three screws are composed of three kinds of threaded elements, namely a conveying element 707, a kneading element 708 and a dispersing element 709, and the arrangement order and quantity can be adjusted according to the battery formula; the slurry coming out of the three-screw extruder 7 is connected to the diaphragm pump 8 through a pipeline through the slurry outlet 706, and enters the pre-buffer tank 10 for cache after demagnetization by the pre-iron remover 9; the pre-buffer tank 10 is connected to the circulation tank of the circulating demagnetization and dispersion system through a pipeline, and a delivery pump 11 is provided on the pipeline for conveying the slurry.

[0038] The circulating demagnetization and dispersion system described in this embodiment includes a circulating tank A 12 and a circulating tank B 13. When the circulating tank A 12 is full, the circulating dispersion is started. Figure 3As shown, the slurry is connected to the online dispersion pump 14 through one of the discharge pipes connected to the discharge port of the circulation tank A 12, the outlet pipe of the online dispersion pump 14 is connected to the iron remover 15, the outlet pipe of the iron remover 15 is connected to the cooler 16, and the outlet of the cooler 16 is connected to the other inlet of the circulation tank A 12, forming a circulating demagnetization loop; the slurry is in a dynamic cycle during the whole process, and the demagnetization effect is further improved. At the same time, the cooler 16 maintains the temperature of the slurry after online dispersion to meet the slurry quality. The circulation tank B 13 is connected in parallel with the circulation tank A 12, and its circulation process is the same.

[0039] After the slurry circulation dispersion is qualified, another discharge pipeline connecting the discharge ports of the slurry circulation tank A 12 and the circulation tank B 13 is transported to the coating buffer tank 18 through the screw pump 17 for slurry coating.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A high solid content circulating pulping system, characterized in that: It comprises a powder feeding system, a liquid feeding system, a multi-screw extruder and a circulating demagnetization dispersion system. The discharge ends of the powder feeding system and the liquid feeding system are respectively connected to the feed end of the multi-screw extruder, and the discharge end of the multi-screw extruder is connected to the feed end of the circulating demagnetization.

2. The high solid content circulating pulping system according to claim 1, characterized in that: The powder feeding system comprises a plurality of groups of powder storage tanks, the discharge ports of the powder storage tanks are connected to a powder mixing bin, and the discharge port of the powder mixing bin is connected to a multi-screw extruder.

3. The high solid content circulating pulping system according to claim 2, characterized in that: The discharge port of the powder storage tank is provided with a metering tank or the powder storage tank is a storage tank with a self-metering function.

4. The high solid content circulating pulping system according to claim 1, characterized in that: The liquid feeding system comprises a liquid storage tank, the discharge port of the liquid storage tank is connected to a liquid delivery pump, and the discharge port of the liquid delivery pump is connected to a multi-screw extruder.

5. The high solid content circulating pulping system according to claim 4, characterized in that: A flow meter is arranged in the delivery pipeline in the liquid feeding system or the liquid delivery pump is a liquid delivery pump with a self-metering function.

6. The high solid content circulating pulping system according to claim 1, characterized in that: The multi-screw extruder comprises a screw and a driving mechanism connected to the screw, and the threaded elements on the screw comprise a conveying element, a kneading element and a dispersing element.

7. The high solid content circulating pulping system according to claim 6, characterized in that: The multi-screw extruder is a three-screw extruder.

8. The high solid content circulating pulping system according to claim 6, characterized in that: The feed inlet of the multi-screw extruder includes a powder feed inlet connected to a powder feed system and a liquid feed inlet connected to a liquid feed system; the driving mechanism includes a connected motor and a reducer.

9. The high solid content circulating pulping system according to claim 1, characterized in that: The circulating demagnetization and dispersion system includes several circulating tanks, the discharge port of the circulating tank is connected to two discharge pipelines, one of which is connected to an online dispersion pump, and the online dispersion pump is connected to the inlet of the circulating tank through a deironing device and a cooler to form a circulating demagnetization loop; the other is connected to a finished product buffer tank through a conveying pump, and the slurry is output from this pipeline after the circulating dispersion is qualified.

10. The high solid content circulating pulping system according to claim 1, characterized in that: A pre-ironing remover and a pre-buffer tank are also provided between the multi-screw extruder and the circulating demagnetization dispersion system, and a delivery pump is provided in the connecting pipeline between the multi-screw extruder and the pre-ironing remover and in the connecting pipeline between the pre-buffer tank and the circulating demagnetization dispersion system.

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