Gas filtering device for producing positive electrode material of lithium battery

Abstract

The utility model discloses a gas filtering device for producing a positive electrode material of a lithium battery, which belongs to the field of gas filtering equipment and comprises a box body, a gas inlet pipe, a partition plate and a filtering medium, and the box body is provided with a containing cavity and a gas outlet communicated with the containing cavity; the air inlet pipe is sequentially provided with an inlet, a filtering section and an outlet in the length direction, the inlet and the outlet are located outside the box body, the inlet is used for inputting gas to be filtered, the filtering section is located at the bottom of the containing cavity and extends in the length direction of the containing cavity, exhaust holes are evenly distributed in the filtering section, and the interior and the exterior of the filtering section are communicated through the exhaust holes; the partition plate is arranged in the containing cavity and divides the containing cavity into at least two filtering cavities in the length direction, and each filtering cavity contains part of the filtering section and is located below the air outlet; and the filter media are arranged in the filter cavities and are used for filtering impurities in the gas to be filtered. According to the gas filtering device, the risk of blockage caused by impurity accumulation can be effectively reduced, and the filtering stability and reliability are improved.

Description

Technical Field

[0001] The utility model relates to the field of gas filtering equipment, in particular to a gas filtering device used for the production of lithium battery positive electrode materials. Background Art

[0002] The preparation of lithium battery cathode materials inevitably produces waste gas containing various impurities. Currently, filtration devices are widely used within the industry to treat these waste gases. However, these filtration devices often rely on air filters as their primary filter element. While they can effectively trap some impurities, they have limitations: the filter cleaning path is relatively short and easily clogged by accumulated impurities. This not only increases maintenance costs but also severely restricts the continuity and stability of the production line, significantly impacting overall production efficiency and product quality.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the Invention

[0004] (1) Technical problems solved

[0005] The utility model provides a gas filtering device for producing lithium battery positive electrode materials, which at least solves the technical problem of how to reduce the risk of blockage due to impurity accumulation and improve the reliability of filtering.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A gas filtration device for producing lithium battery positive electrode materials, comprising:

[0009] A box body, wherein the box body is provided with a cavity and an air outlet communicated with the cavity;

[0010] An air inlet pipe is provided with an inlet, a filtering section, and an outlet in sequence along its length, the inlet and the outlet being located outside the box, the inlet being used to input the gas to be filtered, the outlet being provided with a valve or an end cap, the filtering section being located at the bottom of the cavity and extending along the length of the cavity, the filtering section being evenly provided with exhaust holes in the extension direction, the exhaust holes communicating with the interior and exterior of the filtering section;

[0011] a partition, the partition being disposed in the cavity and dividing the cavity into at least two filter cavities in the longitudinal direction, each of the filter cavities accommodating a portion of the filter segment and being located below the air outlet;

[0012] The filter medium is arranged in each filter cavity and is used to filter impurities in the gas to be filtered.

[0013] In some embodiments, the air inlet pipe further includes a vertical section connected between the inlet and the filtering section, wherein the vertical section and the filtering section are perpendicular to each other and are connected via a bend.

[0014] In some embodiments, the filter medium is a filtered liquid, and the gas filtering device includes a liquid level indicator, which is connected to the box and is used to indicate the liquid level height of the cavity.

[0015] In some embodiments, the air outlet is connected to an external air suction device.

[0016] In some embodiments, a through hole is provided at the bottom of the partition, and the air inlet pipe is fixedly disposed between the inner side of the through hole and the bottom of the cavity.

[0017] In some embodiments, the impurities filtered by the filter medium include NCM materials.

[0018] In some embodiments, the filter section is attached to the bottom of the cavity, and the exhaust holes are evenly distributed in the upper area of ​​the filter section.

[0019] (3) Beneficial effects

[0020] Compared with the prior art, the gas filtration device for lithium battery positive electrode material production provided by the present invention has the following beneficial effects:

[0021] The present invention relates to a gas filtration device for producing lithium battery positive electrode materials. The gas to be filtered is effectively introduced through an air inlet pipe and smoothly enters each filter chamber through densely distributed exhaust holes within the filter section. This process not only ensures sufficient contact between the gas and the filter medium, but also greatly improves the filtration efficiency. More importantly, the present invention innovatively employs a partition structure to cleverly divide the chamber into at least two independent filter chambers, which are arranged sequentially along the direction of gas flow. This layout design offers two significant advantages: first, it achieves continuity and hierarchical filtration. That is, when the filter medium in the front filter chamber gradually approaches its filtration limit or becomes slightly clogged, the filter medium in the rear filter chamber can still maintain its efficient filtration capacity and continue to perform the filtration task, thereby significantly extending the service life of the entire filter device. Second, this design, combined with the uniformly distributed exhaust holes in the filter section, effectively reduces the risk of clogging due to impurity accumulation, reduces the maintenance cost and time cost associated with frequent replacement or cleaning of the filter medium due to clogging, and further improves the stability and reliability of the gas filtration device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1Schematic diagram of a gas filtration device used in the production of lithium battery positive electrode materials in an embodiment.

[0023] Figure 2 This is a three-dimensional diagram of a gas filtration device used in the production of lithium battery positive electrode materials in an embodiment.

[0024] Figure 3 This is a top view of a gas filtration device used in the production of lithium battery positive electrode materials in an embodiment.

[0025] Figure 4 for Figure 3 Cross-sectional view of section A.

[0026] Reference numerals: housing 1 , air inlet pipe 2 , partition 3 , filter medium 4 , liquid level indicator 5 , chamber 10 , air outlet 11 , filter chamber 12 , inlet 21 , filter section 22 , outlet 23 , end cover 24 , exhaust hole 25 , vertical section 26 , through hole 30 . DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0028] During the production process of lithium battery positive electrode materials, gases containing impurities are generated. In related technologies, this gas is usually processed by an NCM filter device. Most NCM filter devices filter the gas through air filters. This filtering method has a short cleaning path and cycle and is prone to clogging, which has a great impact on the stability of filtration and production.

[0029] In order to solve the above technical problems, this embodiment provides a gas filtration device for the production of lithium battery positive electrode materials. Figures 1 to 4 As shown, Figure 1 This is a schematic diagram of a gas filtration device used in the production of lithium battery positive electrode materials in the embodiment. Figure 2 This is a three-dimensional diagram of a gas filtration device used in the production of lithium battery positive electrode materials in the embodiment. Figure 3 This is a top view of a gas filtration device for producing lithium battery positive electrode materials in an embodiment. Figure 4 for Figure 3 Cross-sectional view of section A.

[0030] A gas filtration device for producing lithium battery positive electrode materials in this embodiment, such as Figure 1 As shown, it includes: a box body 1, an air intake pipe 2, a partition 3 and a filter medium 4.

[0031] Box 1, such as Figure 1 As shown, a cavity 10 for accommodating the air inlet pipe 2, the partition plate 3 and the filter medium 4, and an air outlet 11 communicating with the cavity 10 are provided. The air outlet 11 is used to discharge the filtered gas.

[0032] Intake pipe 2, such as Figure 1 and Figure 4 As shown, an inlet 21, a filter section 22 and an outlet 23 are sequentially provided along the length direction. The inlet 21 and the outlet 23 are located outside the box body 1. The inlet 21 is used to input the gas to be filtered, and the outlet 23 is provided with a valve or end cover 24, which can be opened as needed; the filter section 22 is located at the bottom of the cavity 10 and extends along the length direction of the cavity 10. The filter section 22 is evenly provided with exhaust holes 25 in the extension direction. The exhaust holes 25 communicate with the inside and outside of the filter section 22 to allow the gas inside the filter section 22 to flow to the external cavity 10.

[0033] The partition 3 is arranged in the cavity 10 and divides the cavity 10 into at least two filter cavities 12 in the longitudinal direction. It can be understood that the filter cavities 12 are independent of each other, each filter cavity 12 accommodates part of the filter segment 22 and is located below the air outlet 11.

[0034] Filter medium 4, such as Figure 1 As shown, it is arranged in each filter cavity 12 to filter impurities in the gas to be filtered. The filter medium 4 can be selected according to the requirements of gas filtering.

[0035] When the gas filtering device of the above technical solution is working, the gas to be filtered is input through the inlet 21 of the air inlet pipe 2. When the gas to be filtered passes through the filter section 22, it enters the filter cavity 12 through the exhaust hole 25, and then is filtered for impurities through the filter medium 4 in the filter cavity 12, and the filtered gas is discharged from the gas outlet 11; wherein, the partition 3 divides the cavity 10 into at least two filter cavities 12 in the length direction. Since the filter cavities 12 are arranged in sequence along the extension direction of the filter section 22, the gas can enter any filter cavity 12 from any exhaust hole 25 for filtration, which can extend and increase the path available for filtration. At the same time, after the filter medium 4 in the front filter cavity 12 reaches the filtration limit or is blocked, the filter medium 4 in the rear filter cavity 12 can still continue to filter. Combined with the design of evenly distributed exhaust holes 25 in the filter section 22, the risk of blockage due to impurity accumulation can be reduced, and the stability and reliability of filtration can be improved.

[0036] In order to facilitate the transportation of the filter medium 4 in the gas and liquid state to be filtered, refer to Figure 1 and Figure 4 As shown, the air inlet pipe 2 further includes a vertical section 26 connected between the inlet 21 and the filter section 22. The vertical section 26 and the filter section 22 are perpendicular to each other and connected through a bend pipe, forming an L shape as a whole.

[0037] It is understandable that the inlet 21 and the filtering section 22 may also be connected via a horizontally or inclined pipe section.

[0038] In one embodiment of the filter medium 4, see Figure 1 and Figure 4 As shown, the filter medium 4 is a filtered liquid, and the gas filtering device includes a liquid level indicator 5 , which is connected to the box body 1 and is used to indicate the liquid level height of the cavity 10 .

[0039] For example, Figure 2 As shown, the liquid level indicator 5 is an indicator tube connected to the bottom of the cavity 10; or the liquid level indicator 5 is an existing liquid level indicating device or liquid level sensing device.

[0040] Exemplarily, the liquid level indicator 5 may also be configured as follows: a portion of the box body 1 is made of a transparent material, such as acrylic material, and the liquid level indicator 5 is an indicator mark provided in the transparent area.

[0041] In one embodiment of the above-mentioned filter medium 4, the impurities filtered by the filter medium 4 include NCM material. The filter medium 4 is a filled filter material. The specific structure can use the structure of the existing NCM filter element, which will not be repeated here.

[0042] In order to facilitate the timely discharge of the filtered gas from the cavity 10, the gas outlet 11 is connected to an external air suction device. The external air suction device, such as an air pump, can extract the filtered gas in the cavity 10 to improve the gas output efficiency.

[0043] It is understandable that the gas in the cavity 10 can also be naturally discharged from the gas outlet 11 .

[0044] In one embodiment, the filter section 22 is located at the bottom of the cavity 10. Figure 2 and Figure 4 As shown, a through hole 30 is provided at the bottom of the partition 3, and the air intake pipe 2 is fixedly arranged between the inner side of the through hole 30 and the bottom of the cavity 10, and the air intake pipe 2 and the inner side of the through hole 30 are sealed and connected.

[0045] Further, see Figure 1 and Figure 4 As shown, the filter section 22 is attached to the bottom of the cavity 10, and according to the upward flow characteristics of the gas to be filtered, the exhaust holes 25 are only evenly distributed in the upper area of ​​the filter section 22. In this way, the processing difficulty of the intake pipe 2 can be reduced while ensuring the exhaust function.

[0046] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas filtration device for the production of lithium battery positive electrode materials, characterized in that: include: A box body, wherein the box body is provided with a cavity and an air outlet communicated with the cavity; An air inlet pipe is provided with an inlet, a filtering section, and an outlet in sequence along its length, the inlet and the outlet being located outside the box, the inlet being used to input the gas to be filtered, the outlet being provided with a valve or an end cap, the filtering section being located at the bottom of the cavity and extending along the length of the cavity, the filtering section being evenly provided with exhaust holes in the extension direction, the exhaust holes communicating with the interior and exterior of the filtering section; a partition, the partition being disposed in the cavity and dividing the cavity into at least two filter cavities in the longitudinal direction, each of the filter cavities accommodating a portion of the filter segment and being located below the air outlet; The filter medium is arranged in each filter cavity and is used to filter impurities in the gas to be filtered.

2. The gas filtration device for producing lithium battery positive electrode materials according to claim 1, characterized in that: The air inlet pipe further includes a vertical section connected between the inlet and the filtering section. The vertical section and the filtering section are perpendicular to each other and are connected via a bend pipe.

3. The gas filtration device for producing lithium battery positive electrode materials according to claim 1, characterized in that: The filter medium is a filtered liquid, and the gas filtering device includes a liquid level indicator. The liquid level indicator is connected to the box body and is used to indicate the liquid level height of the cavity.

4. The gas filtration device for producing lithium battery positive electrode materials according to claim 1, characterized in that: The air outlet is connected to an external air suction device.

5. The gas filtration device for producing lithium battery positive electrode materials according to claim 1, characterized in that: The bottom of the partition is provided with a through hole, and the air inlet pipe is fixedly arranged between the inner side of the through hole and the bottom of the cavity.

6. The gas filtration device for producing lithium battery positive electrode materials according to claim 1, characterized in that: Impurities filtered by the filter medium include NCM materials.

7. The gas filtration device for producing lithium battery positive electrode materials according to claim 1, characterized in that: The filter section is attached to the bottom of the cavity, and the exhaust holes are evenly distributed in the upper area of ​​the filter section.

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