Totally-closed NMP recycling and collecting device
By using a fully enclosed NMP recirculation and collection device, employing a conical filter screen and a vibrating motor working in tandem, combined with a pressure sensor and a sealing structure, the problem of poor sealing is solved, achieving both high-efficiency filtration and safe leak prevention.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN ZHONGFU ENG TECH
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-05
AI Technical Summary
Existing NMP waste liquid recovery devices have poor sealing performance, making them prone to leakage of volatile organic compounds, which leads to a deterioration of the working environment and increases safety risks.
A fully enclosed NMP recirculation and collection device was designed, which uses a conical filter screen in conjunction with a vibration motor to achieve efficient filtration and prevent clogging. An abnormal air pressure is detected by an air pressure sensor, and a sealing gasket and sealing ring are configured to prevent leakage of volatile gases.
It achieves efficient filtration of solid impurities, prevents equipment blockage, protects the health and safety of operators and the environment, and avoids leakage of volatile organic compounds.
Smart Images
Figure CN224194271U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of NMP waste liquid recycling technology, specifically a fully enclosed NMP recirculation and collection device. Background Technology
[0002] N-Methylpyrrolidone (NMP) is an organic compound, a colorless to pale yellow transparent liquid with a slight ammonia odor. It is miscible with water in any proportion and soluble in ether, acetone, esters, halogenated hydrocarbons, aromatic hydrocarbons, and various other organic solvents. It is almost completely miscible with all solvents. As a highly efficient polar solvent, NMP is widely used in lithium batteries, electronic component cleaning, polymer synthesis, and other fields. However, NMP waste liquid contains a large number of toxic and harmful substances and solid impurities. Improper treatment can easily cause environmental pollution and harm to human health. Existing NMP waste liquid recovery devices have poor sealing performance, and volatile organic compounds are prone to leakage, leading to a deterioration of the working environment and increased safety risks. Utility Model Content
[0003] To address the shortcomings of existing technologies, this invention provides a fully enclosed NMP recirculation collection device to solve the problems mentioned in the background section.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a fully enclosed NMP recirculation and collection device, comprising a recovery tank and a collection tank. A support frame is fixedly connected to the upper surface of the recovery tank. A cover is provided on the top of the collection tank, and a sealing gasket is provided on the lower surface of the cover. A collection pipe is fixedly connected to the top of the cover. A support ring is fixedly connected to the inner wall of the collection tank. A support spring is fixedly connected to the upper surface of the support ring. A conical filter screen is fixedly connected to the top of the support spring. A collection trough is provided at the bottom of the conical filter screen. A vibration motor is provided on the lower surface of the collection trough. A first pressure sensor is provided inside the collection tank. A second pressure sensor is provided on the top of the recovery tank. A liquid level sensor is provided on the inner wall of the collection tank, and the liquid level sensor is located below the conical filter screen.
[0005] Preferably, the through hole on the outer surface of the support frame is provided with a first bolt, and the collection bucket is connected to the support frame through the first bolt.
[0006] Preferably, a second bolt is provided in the through hole on the outer surface of the cover, and the cover is connected to the collection tank by the second bolt.
[0007] Preferably, the conical filter screen is integrally formed with the collection tank, and the bottom of the collection bucket is fixedly connected to a first guide pipe.
[0008] Preferably, a second guide pipe is fixedly connected to the top of the recycling bin, and a drain pipe is fixedly connected to the outer surface of the recycling bin. Solenoid valves are installed inside the collecting pipe, the first guide pipe, the second guide pipe, and the drain pipe.
[0009] Preferably, a sealing ring is provided on the inner surface of the second guide tube, and the inner surface of the sealing ring is adapted to the outer surface of the first guide tube.
[0010] Beneficial effects
[0011] This invention provides a fully enclosed NMP recirculation and collection device. It has the following advantages:
[0012] (1) The fully enclosed NMP waste liquid recycling and collection device achieves efficient filtration and anti-clogging functions of waste liquid through the synergistic effect of conical filter screen and vibration motor. The inclined structure of conical filter screen can guide solid impurities to gather in the collection tank, while the vibration motor causes impurities to slide down the conical surface through high-frequency vibration, avoiding the local clogging problem caused by impurity accumulation in traditional flat filter screen. The integrated conical filter screen and collection tank design further reduces the risk of impurity residue.
[0013] (2) The fully enclosed NMP waste liquid recycling and collection device sets a sealing gasket between the cover and the collection tank, configures a sealing ring at the connection of the guide pipe, and detects air pressure changes through the first air pressure sensor and the second air pressure sensor. Once an abnormal air pressure is detected, the terminal will sound an alarm to remind the staff to carry out maintenance, effectively preventing the leakage of NMP volatile gas and ensuring the health of operators and environmental safety. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is a cross-sectional view of the overall structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the structure of the collector of this utility model.
[0017] In the diagram: 1. Recycling bin; 2. Collection bin; 3. Support frame; 4. First bolt; 5. Cover; 6. Collection pipe; 7. Sealing gasket; 8. Second bolt; 9. Support ring; 10. Support spring; 11. Conical filter screen; 12. Collection tank; 13. Vibration motor; 14. First pressure sensor; 15. First guide pipe; 16. Second guide pipe; 17. Sealing ring; 18. Second pressure sensor; 19. Drain pipe; 20. Solenoid valve; 21. Liquid level sensor. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] Example 1:
[0020] like Figure 1-3 As shown, this utility model provides a fully enclosed NMP recirculation and collection device, including a recovery tank 1 and a collection tank 2. A support frame 3 is fixedly connected to the upper surface of the recovery tank 1. A cover 5 is provided on the top of the collection tank 2. A sealing gasket 7 is provided on the lower surface of the cover 5. A collection pipe 6 is fixedly connected to the top of the cover 5. A support ring 9 is fixedly connected to the inner wall of the collection tank 2. A support spring 10 is fixedly connected to the upper surface of the support ring 9. A conical filter screen 11 is fixedly connected to the top of the support spring 10. A collection trough 12 is provided at the bottom of the conical filter screen 11. A vibration motor 13 is provided on the lower surface of the collection trough 12. A first air pressure sensor 14 is provided inside the collection tank 2. A second air pressure sensor 18 is provided on the top of the recovery tank 1. A liquid level sensor 21 is provided on the inner wall of the collection tank 2. The liquid level sensor 21 is located below the conical filter screen 11.
[0021] Specifically, the support frame 3 has a through hole on its outer surface with a first bolt 4, and the collection tank 2 is connected to the support frame 3 through the first bolt 4.
[0022] Specifically, the outer surface of the cover 5 is provided with a second bolt 8 through the hole, and the cover 5 is connected to the collection tank 2 through the second bolt 8.
[0023] Specifically, the conical filter screen 11 and the collection tank 12 are integrally formed, and the bottom of the collection bucket 2 is fixedly connected to the first guide pipe 15.
[0024] Specifically, a second guide pipe 16 is fixedly connected to the top of the recycling bin 1, and a drain pipe 19 is fixedly connected to the outer surface of the recycling bin 1. Solenoid valves 20 are installed inside the collecting pipe 6, the first guide pipe 15, the second guide pipe 16 and the drain pipe 19.
[0025] Specifically, a sealing ring 17 is provided on the inner surface of the second guide tube 16, and the inner surface of the sealing ring 17 is adapted to the outer surface of the first guide tube 15.
[0026] The working principle and beneficial effects of the above embodiments.
[0027] During normal use, all solenoid valves 20 are closed. During recycling, the solenoid valve 20 on the manifold 6 is opened, allowing NMP waste liquid to enter the collection tank 2. Solid impurities in the waste liquid are filtered by the conical filter screen 11. When the liquid level in the collection tank 2 reaches the level sensor 21, the solenoid valves 20 on the first guide pipe 15 and the second guide pipe 16 open, allowing the waste liquid to pass through them and enter the recycling tank 1. By ensuring the liquid level in the collection tank 2 is always higher than the top of the first guide pipe 15, the recycling tank 1 remains sealed. The vibration motor 13 is periodically activated to drive the conical filter screen 11 to vibrate at high frequency, with the support spring 10 providing cushioning. The solid impurities on the conical filter screen 11 fall into the collection tank 12 along the inclined surface of the conical filter screen 11 under the action of vibration, so as to prevent the conical filter screen 11 from becoming blocked and reduce the cleaning frequency of the conical filter screen 11. All solenoid valves 20 are closed. The first air pressure sensor 14 detects the air pressure fluctuation in the collection tank 2, and the second air pressure sensor 18 detects the air pressure fluctuation in the recovery tank 1. When an abnormality is detected, the terminal issues an alarm to remind the staff. The sealing gasket 7 and sealing ring 17 are set to improve the airtightness of the device. The collection tank 2 can be removed from the recovery tank 1 by removing the first bolt 4, and the cover 5 can be removed by removing the second bolt 8, so as to facilitate the cleaning of the collection tank 12 and the conical filter screen 11.
[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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 a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0029] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A fully enclosed NMP recirculation and collection device, comprising a recycling tank (1) and a collection tank (2), characterized in that: A support frame (3) is fixedly connected to the upper surface of the recycling bin (1). A cover (5) is provided on the top of the collecting bin (2). A sealing gasket (7) is provided on the lower surface of the cover (5). A collecting pipe (6) is fixedly connected to the top of the cover (5). A support ring (9) is fixedly connected to the inner wall of the collecting bin (2). A support spring (10) is fixedly connected to the upper surface of the support ring (9). A conical filter screen (11) is fixedly connected to the top of the support spring (10). A collection trough (12) is provided at the bottom of the conical filter screen (11). A vibration motor (13) is provided on the lower surface of the collection trough (12). A first air pressure sensor (14) is provided inside the collecting bin (2). A second air pressure sensor (18) is provided on the top of the recycling bin (1). A liquid level sensor (21) is provided on the inner wall of the collecting bin (2). The liquid level sensor (21) is located below the conical filter screen (11).
2. The fully enclosed NMP recirculation and collection device according to claim 1, characterized in that: The support frame (3) has a through hole on its outer surface with a first bolt (4), and the collection bucket (2) is connected to the support frame (3) by the first bolt (4).
3. The fully enclosed NMP recirculation and collection device according to claim 1, characterized in that: The cover (5) has a through hole on its outer surface with a second bolt (8), and the cover (5) is connected to the collection bucket (2) by the second bolt (8).
4. The fully enclosed NMP recirculation and collection device according to claim 1, characterized in that: The conical filter screen (11) and the collection tank (12) are integrally formed, and the bottom of the collection bucket (2) is fixedly connected to the first guide pipe (15).
5. The fully enclosed NMP recirculation and collection device according to claim 4, characterized in that: The top of the recycling bin (1) is fixedly connected to a second guide pipe (16), and the outer surface of the recycling bin (1) is fixedly connected to a drain pipe (19). Solenoid valves (20) are installed inside the collection pipe (6), the first guide pipe (15), the second guide pipe (16) and the drain pipe (19).
6. The fully enclosed NMP recirculation and collection device according to claim 5, characterized in that: The inner surface of the second guide tube (16) is provided with a sealing ring (17), and the inner surface of the sealing ring (17) is adapted to the outer surface of the first guide tube (15).