Filtering device for NMP recovery

Abstract

The utility model discloses a filtering device for recycling NMP, which comprises a liquid discharge pipeline and a recycling and filtering box body, the liquid discharge pipeline is installed and connected on the lower side of the left end of the recycling and filtering box body, the upper side of the right end of the recycling and filtering box body is fixedly connected with a liquid inlet pipeline, and the lower side of the right end of the liquid discharge pipeline is in flange connection with a bottom electromagnetic valve. The inner side of the upper end of the recycling and filtering box body is provided with a partition sealing and filtering mechanism, through the arrangement of a lifting cleaning mechanism structure, automatic cleaning can be conducted, a telescopic rod of an electric telescopic cylinder of the lifting cleaning mechanism extends, the telescopic rod of the electric telescopic cylinder drives a movable square block to move downwards when extending, and the movable square block drives a connecting arm column to move downwards; the connecting arm column drives the movable panel to move downwards, and the movable panel is in contact with a middle filter screen of the separating and sealing filter mechanism through the cleaning bristles in the moving-down process, so that impurities attached to the middle filter screen can be effectively brushed away through the cleaning bristles, and cleaning can be automatically completed.

Description

Technical Field

[0001] This utility model relates to the field of NMP recovery technology, specifically to a filtration device for NMP recovery. Background Technology

[0002] NMP is a colorless and transparent liquid with the molecular formula C5H9NO. It has a high boiling point and high solubility. In lithium battery manufacturing, NMP is used as a solvent to fuse the binders, conductive agents and other materials required for the electrodes together, ensuring that these materials are evenly distributed, thereby improving the energy density and coating quality of the lithium battery. When recycling NMP, an NMP recycling filtration device is required.

[0003] Existing Chinese patent CN216726174U, published on June 14, 2022, discloses a filtration device for NMP recovery, including a tank and a partition plate disposed within the tank. The partition plate divides the interior of the tank into an inlet chamber and an outlet chamber. A filter screen is provided at the upper end of the partition plate. The inlet chamber and the outlet chamber are connected through the mesh of the filter screen. An inlet port communicating with the inlet chamber is provided on one side of the inlet chamber, and an outlet port communicating with the outlet chamber is provided on one side of the outlet chamber. The outlet port is located above the inlet port. It can filter solid impurities contained in NMP waste liquid and improve the quality of NMP recovery liquid.

[0004] However, when the above-mentioned device filters through the mesh of the filter screen, the impurities will pass through the mesh of the filter screen and be screened out. The screened-out impurities will adhere to the mesh of the filter screen, which will clog the mesh of the filter screen. This requires personnel to manually clean it regularly. It cannot be cleaned effectively automatically, which makes the cleaning process inconvenient. Utility Model Content

[0005] The purpose of this invention is to provide a filter device for NMP recovery, so as to solve the problem mentioned in the background art that the existing devices cannot effectively and automatically clean up blockages.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a filtration device for NMP recovery, comprising a drain pipe and a recovery filter housing, wherein the drain pipe is installed and connected to the lower left side of the recovery filter housing, an inlet pipe is fixedly connected to the upper right side of the recovery filter housing, a bottom solenoid valve is connected to the lower right flange of the drain pipe, a partition and sealing filter mechanism is installed on the inner side of the upper end of the recovery filter housing, a lifting and cleaning mechanism is installed on the inner side of the partition and sealing filter mechanism, and the lifting and cleaning mechanism and the bottom solenoid valve are connected to an external control box via a connecting line;

[0007] The lifting and cleaning mechanism includes an electric telescopic cylinder, a movable block, a connecting arm column, a movable panel, and cleaning brushes. The movable block is installed at the telescopic rod end of the electric telescopic cylinder. The connecting arm column is fixedly connected to the inner end of the movable block. The movable panel is fixedly connected to the inner end of the connecting arm column. The cleaning brushes are fixedly connected to the inner side of the movable panel.

[0008] The partitioned closed filtration mechanism includes a sealed top cover, an intermediate filter screen, a lifting handle, a connecting end plate, and a bottom protruding plate. The upper end of the sealed top cover is fitted with a lifting handle by screws, the lower end of the sealed top cover is fixedly connected to the connecting end plate, the lower end of the connecting end plate is fixedly connected to the intermediate filter screen, and the lower end of the intermediate filter screen is fixedly connected to the bottom protruding plate. The sealed top cover is installed and connected to the recycling filter box by screws.

[0009] The inner side of the intermediate filter screen has filter holes.

[0010] The recycling filter housing includes a filter housing shell, a post-filtration liquid collection chamber, a pre-filtration liquid collection chamber, and a concave partition panel. The concave partition panel is fixed to the bottom of the filter housing shell. The post-filtration liquid collection chamber is located on the left side of the filter housing shell and the concave partition panel. The pre-filtration liquid collection chamber is located on the right side of the filter housing shell and the concave partition panel. The upper end of the concave partition panel is fitted onto the lower periphery of the bottom convex plate through a groove. The upper end of the filter housing shell is installed and connected to a sealed top cover.

[0011] The electric telescopic cylinder is mounted on the sealed top cover by screws, and the telescopic rod of the electric telescopic cylinder passes through the corresponding hole in the sealed top cover.

[0012] The inlet pipe is connected to an external NMP recovery input pipe, and the outlet pipe is connected to an external NMP recovery output pipe.

[0013] The inlet pipe and outlet pipe are both welded and fixed to the recycling filter box, and the connection is continuous.

[0014] In summary, due to the adoption of the above-mentioned technologies, the beneficial effects of this utility model are:

[0015] 1. In this utility model, by setting up a lifting and cleaning mechanism, cleaning can be performed automatically. The electric telescopic cylinder of the lifting and cleaning mechanism extends, and when the electric telescopic cylinder extends, it drives the movable block to move down. The movable block drives the connecting arm column to move down, and the connecting arm column drives the movable panel to move down. When the movable panel moves down, the cleaning brush bristles come into contact with the intermediate filter screen of the partition and closed filter mechanism, so that the cleaning brush bristles can effectively remove the impurities attached to the intermediate filter screen, thus completing the cleaning automatically.

[0016] 2. In this utility model, by setting up a recycling filter box structure, the isolation and sealing filter mechanism can be installed accordingly. A concave partition panel is fixed to the bottom of the filter box shell. The concave partition panel can be assembled by fitting together through the groove on the inner side of the upper end. A filtration liquid collection chamber is opened on the left side of the filter box shell and the concave partition panel, so as to collect the filtered NMP. A pre-filtration liquid collection chamber is opened on the right side of the filter box shell and the concave partition panel, so as to collect the pre-filtration NMP. The upper end of the concave partition panel is fitted onto the lower periphery of the bottom convex plate through a groove, so as to effectively match and install it, making the installation more convenient. The concave-convex connection makes the connection more stable. The upper end of the filter box shell is installed and connected to the sealing top cover, so as to assemble and connect accordingly. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a filtration device for NMP recovery according to the present invention;

[0018] Figure 2 This is a side cross-sectional view of a filter device for NMP recovery according to the present invention.

[0019] Figure 3 This is a schematic diagram of the combined structure of the partition and sealing filter mechanism and the lifting and cleaning mechanism of the NMP recycling filter device of this utility model;

[0020] Figure 4 This is a schematic diagram of the lifting and cleaning mechanism of a filter device for NMP recycling according to this utility model;

[0021] Figure 5 This is a schematic diagram of the recovery filter box structure of an NMP recovery filter device according to this utility model.

[0022] In the diagram: 1. Partitioned closed filter mechanism; 11. Sealed top cover; 12. Intermediate filter screen; 13. Lifting handle; 14. Connecting end plate; 15. Bottom convex plate; 2. Lifting and cleaning mechanism; 21. Electric telescopic cylinder; 22. Movable block; 23. Connecting arm column; 24. Movable panel; 25. Cleaning brush bristles; 3. Bottom solenoid valve; 4. Liquid inlet pipe; 5. Liquid outlet pipe; 6. Recycling filter box; 61. Filter box shell; 62. Post-filtration liquid collection chamber; 63. Pre-filtration liquid collection chamber; 64. Concave partition panel. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0024] Example 1

[0025] Reference Figures 1-4 A filtration device for NMP recovery includes a drain pipe 5 and a recovery filter housing 6. The drain pipe 5 is installed and connected to the lower left side of the recovery filter housing 6, and can discharge the NMP filtered inside the recovery filter housing 6. An inlet pipe 4 is fixed to the upper right side of the recovery filter housing 6, which can receive the NMP to be filtered and transport the NMP into the recovery filter housing 6. A bottom solenoid valve 3 is connected to the lower right flange of the drain pipe 5, and impurities that fall into the recovery filter housing 6 during cleaning can be discharged to the outside through the bottom solenoid valve 3. An isolation and sealing filter mechanism 1 is installed on the inner side of the upper end. By recycling the isolation and sealing filter mechanism 1 inside the filter box 6, impurities in NMP can be effectively filtered. A lifting and cleaning mechanism 2 is installed on the inner side of the isolation and sealing filter mechanism 1. Impurities attached to the isolation and sealing filter mechanism 1 can be effectively scraped off and cleaned by the lifting and cleaning mechanism 2. The whole process is automatically cleaned, which effectively reduces the labor intensity of personnel. Moreover, it does not require the whole disassembly during cleaning, making it more convenient. The lifting and cleaning mechanism 2 and the bottom solenoid valve 3 are connected to the external control box through the connecting line, and can be controlled and used accordingly through the external control box.

[0026] The lifting and cleaning mechanism 2 includes an electric telescopic cylinder 21, a movable block 22, a connecting arm column 23, a movable panel 24, and cleaning brushes 25. The movable block 22 is installed at the telescopic rod end of the electric telescopic cylinder 21. When the telescopic rod of the electric telescopic cylinder 21 extends, it drives the movable block 22 to move downward. The inner end of the movable block 22 is fixedly connected to the connecting arm column 23. When the movable block 22 moves downward, it drives the connecting arm column 23 to move downward. The inner end of the connecting arm column 23 is fixedly connected to the movable panel 24. When the connecting arm column 23 moves downward, it drives the movable panel 24 to move downward. The inner side of the movable panel 24 is fixedly connected to the cleaning brushes 25. When the movable panel 24 moves downward, it drives the cleaning brushes 25 to move downward, so that the cleaning brushes 25 can clean the deposits on the partition and closed filter mechanism 1, which can complete the automatic cleaning and make the cleaning more convenient and efficient.

[0027] In this invention, the inlet pipe 4 is connected to the external NMP recovery input pipe, so that the inlet pipe 4 can receive the NMP input from the external NMP recovery input pipe. The outlet pipe 5 is connected to the external NMP recovery output pipe, and the outlet pipe 5 outputs the NMP to the outside for recovery through the external NMP recovery output pipe.

[0028] In this invention, both the inlet pipe 4 and the outlet pipe 5 are welded and fixed to the recovery filter box 6, and the connection is through, which can effectively install and fix them. The through connection makes it easy for NMP to be input and output.

[0029] Example 2

[0030] Reference Figures 1-5 A filtration device for NMP recycling, compared to Embodiment 1, includes a sealed filtration mechanism 1 comprising a sealed top cover 11, an intermediate filter screen 12, a lifting handle 13, a connecting end plate 14, and a bottom protruding plate 15. The lifting handle 13 is screwed to the upper end of the sealed top cover 11, allowing the sealed top cover 11 to be lifted and carried when held by a person. The connecting end plate 14 is fixedly connected to the lower end of the sealed top cover 11, and the intermediate filter screen 12 is fixedly connected to the lower end of the connecting end plate 14. The lower end of the intermediate filter 12 is fixedly connected to a bottom protrusion 15. The bottom end of the bottom protrusion 15 can be sleeved on the concave partition panel 64 of the recovery filter box 6, so that it can be positioned and installed. The intermediate filter 12 and the bottom protrusion 15 can be effectively separated by the connecting end plate 14, the intermediate filter 12 and the bottom protrusion 15. The intermediate filter 12 can filter NMP impurities. The sealing top cover 11 is installed and connected to the recovery filter box 6 by screws. The sealing top cover 11 can effectively close the upper opening of the recovery filter box 6.

[0031] The inner side of the intermediate filter 12 is provided with filter mesh holes, which can effectively filter NMP impurities.

[0032] The electric telescopic cylinder 21 is installed on the sealing top cover 11 by screws, which makes it easy to install and fix. The telescopic rod of the electric telescopic cylinder 21 passes through the corresponding hole in the sealing top cover 11, which makes it easy to extend and retract.

[0033] In this invention, the recycling filter housing 6 includes a filter housing shell 61, a post-filtration liquid collection chamber 62, a pre-filtration liquid collection chamber 63, and a concave partition panel 64. The concave partition panel 64 is fixedly connected to the bottom of the filter housing shell 61. The concave partition panel 64 can be assembled by corresponding fitting through the slot on the inner side of its upper end. The post-filtration liquid collection chamber 62 is opened on the left side of the filter housing shell 61 and the concave partition panel 64, so as to collect the filtered NMP. The pre-filtration liquid collection chamber 63 is opened on the right side of the filter housing shell 61 and the concave partition panel 64, so as to collect the unfiltered NMP. The upper end of the concave partition panel 64 is fitted onto the lower periphery of the bottom convex plate 15 through a groove, which can be effectively matched and installed, making installation more convenient. The concave-convex connection makes the connection more stable. The upper end of the filter housing shell 61 is installed and connected to the sealing top cover 11, so as to be assembled and connected accordingly.

[0034] Working principle: During use, the recovery filter box 6 receives NMP from the external NMP recovery input pipe through the inlet pipe 4. The NMP received inside the recovery filter box 6 is effectively filtered by the partition-sealed filter mechanism 1. The filtered NMP is discharged into the external NMP recovery output pipe through the drain pipe 5 on the lower left side of the recovery filter box 6 for recycling. Impurities attached to the partition-sealed filter mechanism 1 are effectively scraped off by the lifting and cleaning mechanism 2. The entire process is automatic, effectively reducing the labor intensity of personnel. The entire unit does not need to be disassembled during cleaning, making cleaning more convenient. During cleaning, the electric telescopic cylinder 21 of the lifting cleaning mechanism 2 extends, which in turn drives the movable block 22 to move down. The movable block 22 then drives the connecting arm 23 to move down, which in turn drives the movable panel 24 to move down. As the movable panel 24 moves down, the cleaning brush 25 comes into contact with the intermediate filter screen 12 of the partition and closed filter mechanism 1. Thus, the cleaning brush 25 can effectively remove the impurities attached to the intermediate filter screen 12, thereby automatically completing the cleaning process.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A filtering device for NMP recovery, comprising a liquid discharge conduit (5) and a recovery filtering tank (6), characterized in that: The liquid outlet pipeline (5) is connected and installed at the lower left end of the recovery filter box (6), the upper right end of the recovery filter box (6) is fixedly connected with the liquid inlet pipeline (4), the lower right end of the liquid outlet pipeline (5) is flange-connected with the bottom electromagnetic valve (3), the inner upper end of the recovery filter box (6) is provided with the partition closed filter mechanism (1), the inner side of the partition closed filter mechanism (1) is provided with the lifting cleaning mechanism (2), and the lifting cleaning mechanism (2) and the bottom electromagnetic valve (3) are connected with the external control cabinet through connecting wires. The lifting cleaning mechanism (2) comprises an electric telescopic cylinder (21), a movable block (22), a connecting arm column (23), a movable panel (24) and cleaning bristles (25), the telescopic rod end of the electric telescopic cylinder (21) is provided with the movable block (22), the inner end of the movable block (22) is fixedly connected with the connecting arm column (23), the inner end of the connecting arm column (23) is fixedly connected with the movable panel (24), and the inner side of the movable panel (24) is fixedly connected with the cleaning bristles (25).

2. The filtering device for NMP recovery according to claim 1, characterized in that: The partition closed filter mechanism (1) comprises a sealing top cover (11), an intermediate filter screen (12), a lift handle (13), a connecting end plate (14) and a bottom protruding plate (15), the upper end of the sealing top cover (11) is provided with the lift handle (13) through screws, the lower end of the sealing top cover (11) is fixedly connected with the connecting end plate (14), the lower end of the connecting end plate (14) is fixedly connected with the intermediate filter screen (12), the lower end of the intermediate filter screen (12) is fixedly connected with the bottom protruding plate (15), and the sealing top cover (11) is connected and installed on the recovery filter box (6) through screws.

3. The filtering device for NMP recovery according to claim 2, characterized in that: The inner side of the intermediate filter screen (12) is provided with filter screen holes.

4. The filtering device for NMP recovery according to claim 2, characterized in that: The recovery filter box (6) comprises a filter box shell (61), a post-filter liquid collection cavity (62), a pre-filter liquid collection cavity (63) and a concave partition panel (64), the inner bottom end of the filter box shell (61) is fixedly connected with the concave partition panel (64), the inner left side of the filter box shell (61) and the concave partition panel (64) is provided with the post-filter liquid collection cavity (62), the inner right side of the filter box shell (61) and the concave partition panel (64) is provided with the pre-filter liquid collection cavity (63), the upper end of the concave partition panel (64) is sleeved on the lower end of the bottom protruding plate (15) through a groove, and the upper end of the filter box shell (61) is connected and installed on the sealing top cover (11).

5. The filtering device for NMP recovery according to claim 1, characterized in that: The electric telescopic cylinder (21) is connected and installed on the sealing top cover (11) through screws, and the telescopic rod of the electric telescopic cylinder (21) penetrates through the corresponding hole of the sealing top cover (11).

6. The filtering device for NMP recovery according to claim 1, characterized in that: The liquid inlet pipeline (4) is connected with an external NMP recovery input pipe, and the liquid outlet pipeline (5) is connected with an external NMP recovery output pipe.

7. The filtering device for NMP recovery according to claim 6, characterized in that: The liquid inlet pipeline (4) and the liquid outlet pipeline (5) are both welded and fixedly connected on the recovery filter box (6), and the connection portions are penetrated.

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