Pipeline degassing system for preparing lithium battery slurry

Abstract

The utility model relates to a pipeline degassing system for preparing lithium battery slurry, which comprises a main pipeline for conveying powder, a filter device is mounted in the main pipeline in a matched manner, a vacuum module is mounted on the main pipeline in a matched manner, and the vacuum module is connected with the filter device under the action of the vacuum module. And gas mixed in the powder in the main pipeline is extracted after being separated by the filtering device. By arranging the vacuum module and the filtering device, gas contained in the powder in the main pipeline can be pumped out, so that separation of powder and gas in the powder is achieved, gas components in follow-up slurry are reduced, the slurry bubble generation rate is reduced, and the slurry preparation quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery slurry preparation technology, and in particular to a pipeline degassing system for preparing lithium battery slurry. Background Technology

[0002] In the lithium battery slurry preparation process, powder is fed from metering or storage equipment through a powder conveying pipeline into the slurry preparation equipment, where it is rapidly dispersed and mixed with liquid materials to form a slurry. In existing technologies, during the process of the powder falling through the powder conveying pipeline into the slurry preparation equipment, the powder carries excessive gas into the equipment, resulting in a large number of air bubbles in the slurry. These air bubbles directly affect the slurry quality, negatively impacting subsequent processes and increasing costs. Utility Model Content

[0003] In response to the shortcomings of the existing production technology, the applicant provides a pipeline degassing system for preparing lithium battery slurry. By setting up a vacuum module and a filtration device, the gas contained in the powder in the main pipeline can be extracted, thereby achieving the separation of powder and gas in the powder, reducing the gas component in the subsequent slurry, reducing the bubble formation rate of the slurry, and improving the slurry quality.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A pipeline degassing system for preparing lithium battery slurry includes a main pipeline for conveying powder, a filter device installed inside the main pipeline, and a vacuum module installed on the main pipeline. Under the action of the vacuum module, the gas mixed in the powder inside the main pipeline is separated by the filter device and then extracted.

[0006] As a further improvement to the above technical solution:

[0007] The outer wall of the filter device is spaced apart from the inner wall of the main pipe to form an air gap passage. The interior of the filter device is hollow, thus forming a conveying channel for conveying powder.

[0008] The vacuum module includes a first connecting pipe assembly and at least one first branch pipe assembly;

[0009] The first connecting pipe assembly is connected to the negative pressure source;

[0010] One end of the first branch pipe group is connected to the first connecting pipe group, and the other end of the first branch pipe group is connected to the air gap passage.

[0011] The negative pressure source generates negative pressure, thereby making the pressure inside the air gap passage lower than the pressure inside the delivery channel through the first connecting pipe group and the first branch pipe group.

[0012] It also includes a cleaning module, which includes a second connecting pipe group and an array of second branch pipe groups. The second branch pipe groups correspond one-to-one with the first branch pipe groups. One end of a single second branch pipe group is connected to the first branch pipe group, and the other end of a single second branch pipe group is connected to the second connecting pipe group. A pulse valve is installed on the single second branch pipe group.

[0013] The second connecting pipe group is connected to a compressed air source, which provides compressed air that is blown into the corresponding first branch pipe group through the second connecting pipe group and the second branch pipe group, thereby backflushing the filter device through the first branch pipe group.

[0014] A pressure regulating valve is installed on the first connecting pipe assembly.

[0015] A vacuum valve is installed on the first branch pipe group of the single group.

[0016] A pressure monitoring device is installed on the main pipeline.

[0017] The main pipe has annular bosses at both ends, which restrict the axial displacement of the filter device.

[0018] The filter device is installed with a seal between it and the single boss.

[0019] Individual seals use rubber sealing rings or fillers.

[0020] The beneficial effects of this utility model are as follows:

[0021] This utility model has a compact and reasonable structure and is easy to operate. Through the vacuum module and the filter device, it can extract the gas mixed in the powder under the set vacuum degree, remove some of the gas carried by the powder, thereby reducing the bubbles in the subsequent pulping process and improving the pulping quality.

[0022] This utility model also has the following advantages:

[0023] (1) By setting up a filter device, the gas and powder can be separated, achieving the effect of degassing and preventing powder leakage.

[0024] (2) By setting a pressure regulating valve, the pumping volume can be controlled to ensure the stability of the vacuum in the system, thereby avoiding excessive vacuum that causes powder to be adsorbed on the surface of the filter device and affects the degassing effect.

[0025] (3) By setting up a cleaning module, the powder adhering to the filter device can be cleaned, thereby improving the system reliability and extending the service life of the filter device.

[0026] (4) By setting up a pressure monitoring device, the clogging status of the filter device can be reflected, thereby guiding the opening frequency of the pulse valve. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0028] Figure 2 This is a schematic diagram of another embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of the installation structure of the main pipe and the filter device in this utility model.

[0030] The components are: 1. Main pipe; 101. Boss; 2. Filter device; 3. Air gap passage; 4. Pressure monitoring device; 5. Conveying channel; 6. First connecting pipe group; 7. Tee joint; 8. Pressure regulating valve; 9. First branch pipe group; 10. Vacuum valve; 11. Switch valve; 12. Second connecting pipe group; 13. Second branch pipe group; 14. Pulse valve. Detailed Implementation

[0031] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0032] The structure and function of this utility model are as follows:

[0033] like Figures 1-3 As shown, a pipeline degassing system for preparing lithium battery slurry includes a main pipeline 1 for conveying powder, a filter device 2 installed inside the main pipeline 1, and a vacuum module installed on the main pipeline 1. Under the action of the vacuum module, the gas mixed in the powder inside the main pipeline 1 is separated by the filter device 2 and then extracted. By setting up the vacuum module and the filter device 2, the gas contained in the powder in the main pipeline 1 can be extracted, thereby achieving the separation of powder and gas in the powder, reducing the gas component in the subsequent slurry, reducing the bubble formation rate of the slurry, and improving the slurry quality.

[0034] The pipeline degassing system of this utility model includes a main pipeline 1, a filter device 2, a vacuum module, and a cleaning module; wherein,

[0035] The outer wall of the filter device 2 is spaced apart from the inner wall of the main pipe 1, thus forming an air gap passage 3. The interior of the filter device 2 is hollow, thus forming a conveying channel 5 for conveying powder. The air gap passage 3 is used to allow gas mixed in the powder to escape; the conveying channel 5 is used for powder discharge.

[0036] The filter device 2 is cylindrical and hollow inside. The filter device 2 allows gas to escape into the air gap passage 3 and can retain powder in the conveying channel 5, thereby separating the powder from the gas in the powder. The filter device 2 can use a metal sintered filter element, a non-woven filter element, a PP cotton filter element, or a filter element of other materials. Different filter elements have different filtration precisions, and the specific selection and setting should be made according to the type of powder to be processed.

[0037] A pressure monitoring device 4 is installed on the main pipeline 1. The pressure monitoring device 4 can be a pressure sensor or a pressure gauge, which is used to monitor the pressure inside the air gap passage 3, thereby determining whether the filter device 2 is blocked.

[0038] The main pipe 1 has annular bosses 101 at both ends, which restrict the axial displacement of the filter device 2. The main pipe 1 is installed with the filter device 2 through the bosses 101, which limit and fix the filter device 2.

[0039] The filter device 2 is installed with a seal between itself and the single boss 101, which can improve the vacuuming effect of the vacuum module.

[0040] Individual seals use rubber sealing rings or fillers, which provide good sealing performance and are inexpensive.

[0041] The vacuum module includes a first connecting pipe assembly 6 and at least one first branch pipe assembly 9. The first connecting pipe assembly 6 is connected to a negative pressure source. One end of each first branch pipe assembly 9 is connected to the first connecting pipe assembly 6, and the other end of each first branch pipe assembly 9 is connected to the air gap passage 3. The negative pressure source generates negative pressure, thereby making the pressure inside the air gap passage 3 lower than the pressure inside the conveying channel 5 via the first connecting pipe assembly 6 and the first branch pipe assembly 9. The vacuum module is used to generate negative pressure and create a pressure difference between the air gap passage 3 and the conveying channel 5, so that gas in the powder enters the air gap passage 3 from the conveying channel 5 and is finally discharged through the pipeline.

[0042] In this utility model, such as Figure 2 As shown, a first branch pipe group 9 can be set up; or, as shown... Figure 1 As shown, two sets of first branch pipe groups 9 can be set to improve the pressure uniformity in the air gap passage 3. At this time, a tee connector 7 can be used to connect the first connecting pipe group 6 with the two sets of first branch pipe groups 9.

[0043] A pressure regulating valve 8 is installed on the first connecting pipe assembly 6. The pressure regulating valve 8 is manual, and the spring pressure is controlled by a knob, thereby controlling the air extraction volume of the negative pressure source. This ensures that the vacuum degree in the air gap passage 3 is stable at the set value, and prevents the internal vacuum from being too large, which would cause powder to be adsorbed on the surface of the filter device 2 and affect the degassing effect.

[0044] A vacuum valve 10 is installed on the first branch pipe group 9 of a single unit. The vacuum valve 10 controls the on / off state of the corresponding first branch pipe group 9.

[0045] The system also includes a cleaning module, which comprises a second connecting pipe assembly 12 and multiple second branch pipe assemblies 13. Each second branch pipe assembly 13 corresponds one-to-one with a first branch pipe assembly 9. One end of each second branch pipe assembly 13 is connected to a first branch pipe assembly 9, and the other end is connected to the second connecting pipe assembly 12. A pulse valve 14 is installed on each second branch pipe assembly 13. The second connecting pipe assembly 12 is connected to a compressed air source, which provides compressed air that is blown into the corresponding first branch pipe assembly 9 through the second connecting pipe assembly 12 and the second branch pipe assembly 13, thereby backflushing the filter device 2 through the first branch pipe assembly 9. The cleaning module is used to backflush and clean the filter device 2 to prevent powder from adhering to the surface of the filter device 2 and affecting gas escape.

[0046] A switch valve 11 is installed on the second connecting pipe assembly 12 to control the opening and closing of the second connecting pipe assembly 12; the pulse valve 14 can control the corresponding second branch pipe assembly 13 to open and close at a set frequency, thereby enabling the filter device 2 to be backflushed at regular intervals.

[0047] The working process of this utility model is as follows:

[0048] When the negative pressure source is started, the air extraction volume of the negative pressure source is adjusted by the pressure regulating valve 8, the vacuum valve 10 is opened, and the powder material is discharged.

[0049] The powder is fed through the conveying channel 5. During the feeding process, the air gap passage 3 is evacuated by the negative pressure source through the first connecting pipe group 6 and the first branch pipe group 9, so that the pressure inside the air gap passage 3 is less than the pressure inside the feeding passage 5. Under the action of the pressure difference and the negative pressure source, the gas in the powder is discharged to the external environment through the first branch pipe group 9 and the first connecting pipe group 6.

[0050] After the pipeline degassing system has been working stably for a certain period of time, the pulse valve 14 opens, and the compressed air source blows compressed air into the air gap passage through the second connecting pipe group 12, the second branch pipe group 13, and the first branch pipe group 9, thereby blowing off the powder adhering to the inner surface of the filter device 2 to avoid affecting the degassing effect.

[0051] 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 piping degassing system for preparing a lithium battery slurry, characterized by: The application relates to a device for conveying powder, which comprises a main pipe (1) for conveying powder, a filter device (2) fitted in the main pipe (1), and a vacuum module fitted on the main pipe (1), wherein gas mixed in the powder in the main pipe (1) is separated by the filter device (2) and then extracted under the action of the vacuum module.

2. A gas removal system for piping for preparing slurry for lithium batteries according to claim 1, characterized in that: The outer wall surface of the filter device (2) is spaced apart from the inner wall surface of the main pipe (1) to form an air gap passage (3), and the filter device (2) is hollow in the inside to form a conveying channel (5) for conveying powder.

3. A piping degassing system for preparing slurry for lithium batteries according to claim 2, characterized in that: The vacuum module comprises a first connecting pipe group (6) and at least one first branch pipe group (9). The first connecting pipe group (6) is connected with a negative pressure source. One end of the first branch pipe group (9) is connected with the first connecting pipe group (6), and the other end of the first branch pipe group (9) is connected with the air gap passage (3). The negative pressure source generates negative pressure, so that the pressure inside the air gap passage (3) is lower than the pressure inside the conveying channel (5) through the first connecting pipe group (6) and the first branch pipe group (9).

4. A gas removal system for piping for preparing slurry for lithium batteries according to claim 3, characterized in that: The device further comprises a cleaning module, which comprises a second connecting pipe group (12) and a plurality of second branch pipe groups (13), the second branch pipe groups (13) correspond to the first branch pipe groups (9) one by one, one end of the second branch pipe group (13) is connected with the first branch pipe group (9), the other end of the second branch pipe group (13) is connected with the second connecting pipe group (12), and a pulse valve (14) is fitted on the second branch pipe group (13). The second connecting pipe group (12) is connected with a compressed air source, the compressed air source provides compressed air, and the compressed air is blown into the corresponding first branch pipe group (9) through the second connecting pipe group (12) and the second branch pipe group (13), so that the filter device (2) is back-flushed through the first branch pipe group (9).

5. A gas removal system for piping for preparing slurry for lithium batteries according to claim 3, characterized in that: A pressure regulating valve (8) is fitted on the first connecting pipe group (6).

6. A gas removal system for piping for preparing slurry for lithium batteries according to claim 3, characterized in that: A vacuum valve (10) is fitted on the first branch pipe group (9).

7. A gas removal system for piping for preparing slurry for lithium batteries according to claim 1, characterized in that: A pressure monitoring device (4) is fitted on the main pipe (1).

8. A gas removal system for piping for preparing slurry for lithium batteries according to claim 1, characterized in that: Two ends of the main pipe (1) are respectively provided with annular bosses (101), and the bosses (101) limit the axial displacement of the filter device (2).

9. A gas removal system for piping for preparing slurry for lithium batteries according to claim 8, characterized in that: The filter device (2) and the single boss (101) are fitted through a sealing element.

10. A gas removal system for piping for preparing slurry for lithium batteries according to claim 9, characterized in that: The single sealing element is a rubber sealing ring or a rubber filling.

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