Efficient vacuum pumping system for NMP (N-Methyl Pyrrolidone)

Abstract

The utility model discloses an efficient vacuum pumping system for NMP (N-Methyl Pyrrolidone), which relates to the technical field of organic solution conveying and comprises a vacuum buffer tank, a filter component is arranged on one side of the vacuum buffer tank, a control component is arranged on the other side of the vacuum buffer tank, and a conveying component is arranged below the vacuum buffer tank. The conveying assembly comprises a discharging pipe, the upper end of the discharging pipe is fixedly connected with the output end of the vacuum buffer tank, the other end of the discharging pipe is fixedly connected with a three-way piece, and the other two ends of the three-way piece are each fixedly connected with a conveying pipe. The conveying assembly and the vacuum pump are used as material conveying equipment, materials are extracted from the vacuum buffer tank, and the two pumps are alternately used, so that the reliability and the flexibility of the system are improved, a standby vacuum pump can be switched to be used at any time when a fault occurs or maintenance occurs, and the production is not delayed.

Description

Technical Field

[0001] This utility model relates to the field of organic solution transportation technology, specifically a high-efficiency vacuum pumping system for NMP. Background Technology

[0002] NMP (N-methylpyrrolidone) is a commonly used organic solvent, widely used in chemical, pharmaceutical, and electronics industries. High-efficiency vacuum pumping systems are used to handle NMP, and the physicochemical properties of NMP, such as its boiling point, solubility, volatility, and potential hazards to human health and the environment, need to be considered. Generally, high-efficiency vacuum pumping systems are currently used for efficient transport.

[0003] While high-efficiency vacuum pumping systems offer many advantages in handling organic solvents such as NMP, they also have some potential drawbacks or limitations. For example, the corrosive nature of organic solutions can easily damage the pump body and lead to malfunctions. Therefore, high-efficiency vacuum pumps or transfer pumps may require regular maintenance and replacement of seals to maintain their performance and prevent leaks. This creates a production vacuum period. At the same time, precision filters may become clogged due to particulate matter in the material and require regular cleaning or replacement, which may lead to production interruptions and reduced production efficiency.

[0004] Based on this, a high-efficiency vacuum pumping system for NMP is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency vacuum pumping system for NMP to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high-efficiency vacuum material extraction system for NMP includes a vacuum buffer tank, a filter assembly on one side of the vacuum buffer tank, a control assembly on the other side of the vacuum buffer tank, and a conveying assembly below the vacuum buffer tank.

[0008] The conveying assembly includes a discharge pipe, the upper end of which is fixedly connected to the output end of the vacuum buffer tank. A tee is fixedly connected to the other end of the discharge pipe. A conveying pipe is fixedly connected to both ends of the tee. A vacuum pump is fixedly connected to the other end of each conveying pipe. A metering tube is fixedly connected to the output end of each vacuum pump. A metering device is fixedly connected to the middle of each metering tube.

[0009] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0010] In one alternative: each of the delivery pipes is fixedly connected to a second solenoid valve at the end adjacent to the tee.

[0011] In one alternative embodiment: the filter assembly includes a filter box, one end of which is fixedly connected to a feed pipe, and the other end of which is fixedly connected to a feed pipe. Two precision filters are symmetrically arranged inside the filter box. The output and input ends of the two precision filters are respectively fixedly connected to a filter pipe, and the middle portions of the two filter pipes are respectively fixedly connected to one end of the adjacent feed pipe and feed pipe.

[0012] In one alternative: each of the filter tubes is fixedly connected to a first solenoid valve at both ends.

[0013] In one alternative: one end of the feed pipe is fixedly connected to the input end of the vacuum buffer tank, and the feed pipe is fixedly connected to the incoming material direction pipeline through a flange.

[0014] In one alternative embodiment: the control component includes a control box, which is fixedly connected to one side of the vacuum buffer tank. An electrical control integrator is fixedly connected inside the control box, and several frequency converters are electrically connected to the input terminal of the electrical control integrator. A control panel is fixedly connected to the outside of the control box.

[0015] In one alternative: the electrical control integrator is electrically connected to the control panel.

[0016] In one alternative: the frequency converter is electrically connected to the vacuum pump, the meter, the precision filter, the first solenoid valve, and the second solenoid valve.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model, through its specially designed conveying components, ensures that materials pass through a precision filter before entering the extraction system. This step is crucial as it removes impurities and particles, ensuring material purity. The filtered material is then drawn into a vacuum buffer tank. This buffer tank balances pressure fluctuations during extraction, guaranteeing stable material delivery. A vacuum pump, acting as the material conveying device, extracts material from the vacuum buffer tank. The design of two pumps working alternately enhances the system's reliability and flexibility, allowing for immediate switching to a backup vacuum pump in case of malfunction or maintenance, ensuring uninterrupted production. Simultaneously, precise filtration and stable delivery ensure material quality and smooth process flow. This innovative process not only improves production efficiency but also helps reduce production costs, contributing to sustainable development.

[0019] 2. This utility model, through its filter components, also adopts a main and backup method. When a certain precision filter needs maintenance or cleaning, people can quickly switch the precision filter in use by switching on and off the first solenoid valve, thereby realizing rapid switching between precision filters. This ensures that the delivery of solution will not be hindered when a single precision filter is stopped for maintenance, effectively improving the quality of materials and the smoothness of the process flow. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the filter assembly structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the conveying component structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the control component structure of this utility model.

[0024] Figure label annotations: 1. Vacuum buffer tank; 2. Feed pipe; 3. Filter box; 4. Feed pipe; 5. Control box; 6. Discharge pipe; 7. T-joint; 8. Conveying pipe; 9. Vacuum pump; 10. Metering tube; 11. Meter; 12. Precision filter; 13. Filter tube; 14. First solenoid valve; 15. Second solenoid valve; 16. Control panel; 17. Electrical control integrator; 18. Frequency converter. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] In one embodiment, such as Figures 1-4 As shown, a high-efficiency vacuum material extraction system for NMP includes a vacuum buffer tank 1, a filter assembly is provided on one side of the vacuum buffer tank 1, a control assembly is provided on the other side of the vacuum buffer tank 1, and a conveying assembly is provided below the vacuum buffer tank 1.

[0027] The conveying assembly includes a discharge pipe 6, the upper end of which is fixedly connected to the output end of the vacuum buffer tank 1. A three-way fitting 7 is fixedly connected to the other end of the discharge pipe 6. A conveying pipe 8 is fixedly connected to both ends of the three-way fitting 7. A vacuum pump 9 is fixedly connected to the other end of each conveying pipe 8. A metering pipe 10 is fixedly connected to the output end of each vacuum pump 9. A metering device 11 is fixedly connected to the middle of each metering pipe 10.

[0028] In this embodiment, after the material is processed by the vacuum buffer tank 1, it is transferred to the inside of the three-way fitting 7 through the discharge pipe 6. At this time, the second solenoid valve 15 adjacent to the operating vacuum pump 9 is in the open state. The material is transferred to the vacuum pump 9 through the corresponding conveying pipe 8 and then transferred out through the vacuum pump 9 and the metering pipe 10. At this time, the meter 11 is constantly monitoring the flow rate. Once a decrease in flow rate is detected, it will determine that the vacuum pump 9 has a certain fault. At this time, the vacuum pump 9 will be switched to be used quickly by opening and closing the second solenoid valve 15.

[0029] In one embodiment, such as Figure 3 As shown, each of the delivery pipes 8 and the three-way fitting 7 is fixedly connected to a second solenoid valve 15 at one end, and different vacuum pumps 9 can be used by switching on and off different second solenoid valves 15.

[0030] In one embodiment, such as Figure 1 and Figure 2 As shown, the filter assembly includes a filter box 3. One end of the filter box 3 is fixedly connected to a feed pipe 2, and the other end of the filter box 3 is fixedly connected to a feed pipe 4. Two precision filters 12 are symmetrically arranged inside the filter box 3. The output and input ends of the two precision filters 12 are respectively fixedly connected to a filter tube 13. The middle parts of the two filter tubes 13 are respectively fixedly connected to one end of the adjacent feed pipe 2 and feed pipe 4. When the precision filter 12 needs maintenance or repair, the precision filter 12 used can be switched by switching different first solenoid valves 14. The maintenance and repair of the vacuum pump 9 and the precision filter 12 can be achieved simultaneously without delaying the material conveying process.

[0031] In one embodiment, such as Figure 2 As shown, each of the filter tubes 13 is fixedly connected to a first solenoid valve 14 at both ends, and the precision filter 12 used is switched by switching different first solenoid valves 14.

[0032] In one embodiment, such as Figure 1 As shown, one end of the feed pipe 4 is fixedly connected to the input end of the vacuum buffer tank 1, and the feed pipe 2 is fixedly connected to the incoming material direction pipe through a flange. The feed pipe 2 and the feed pipe 4 form a sealed connection between the filter assembly, the incoming material direction equipment, and the vacuum buffer tank 1.

[0033] In one embodiment, such as Figure 4 As shown, the control component includes a control box 5, which is fixedly connected to one side of the vacuum buffer tank 1. An electrical control integrator 17 is fixedly connected inside the control box 5. Several frequency converters 18 are electrically connected to the input terminal of the electrical control integrator 17. A control panel 16 is fixedly connected to the outside of the control box 5. The entire system is uniformly coordinated through the control component.

[0034] In one embodiment, such as Figure 4 As shown, the electrical control integrator 17 is electrically connected to the control panel 16.

[0035] In one embodiment, such as Figure 4 As shown, the frequency converter 18 is electrically connected to the vacuum pump 9, the meter 11, the precision filter 12, the first solenoid valve 14 and the second solenoid valve 15 respectively. The frequency converter 18 converts the vacuum pump 9, the meter 11, the precision filter 12, the first solenoid valve 14 and the second solenoid valve 15 into frequencies and then transmits the data to the electrical control integrator 17 for centralized processing.

[0036] The above embodiment discloses a high-efficiency vacuum material extraction system for NMP. During material conveying, the material is first filtered by the precision filter 12 inside the filter box 3 and then transferred to the vacuum buffer tank 1. After being processed by the vacuum buffer tank 1, the material is conveyed to the three-way fitting 7 through the discharge pipe 6. At this time, the second solenoid valve 15 adjacent to the operating vacuum pump 9 is in the open state. The material is conveyed to the vacuum pump 9 through the corresponding conveying pipe 8 and then conveyed out through the vacuum pump 9 and the metering pipe 10. The meter 11 continuously monitors the flow rate. Once a decrease in flow rate is detected, it will determine that the vacuum pump 9 has a certain fault. At this time, the vacuum pump 9 will be switched quickly by opening and closing the second solenoid valve 15. The same principle applies during maintenance. Similarly, when the precision filter 12 needs maintenance or repair, the precision filter 12 is switched by opening and closing different first solenoid valves 14. Maintenance and repair of the vacuum pump 9 and the precision filter 12 can be carried out simultaneously without delaying the material conveying process.

[0037] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A high-efficiency vacuum material extraction system for NMP, comprising a vacuum buffer tank (1), a filter assembly being provided on one side of the vacuum buffer tank (1), a control assembly being provided on the other side of the vacuum buffer tank (1), and a conveying assembly being provided below the vacuum buffer tank (1); Its features are, The conveying assembly includes a discharge pipe (6), the upper end of which is fixedly connected to the output end of the vacuum buffer tank (1), and the other end of the discharge pipe (6) is fixedly connected to a three-way fitting (7). The other two ends of the three-way fitting (7) are fixedly connected to a conveying pipe (8). The other end of each conveying pipe (8) is fixedly connected to a vacuum pump (9). The output end of each vacuum pump (9) is fixedly connected to a metering pipe (10), and the middle of each metering pipe (10) is fixedly connected to a meter (11).

2. The high-efficiency vacuum pumping system for NMP according to claim 1, characterized in that, Each of the aforementioned delivery pipes (8) is fixedly connected to a second solenoid valve (15) at one end adjacent to the tee (7).

3. The high-efficiency vacuum pumping system for NMP according to claim 1, characterized in that, The filter assembly includes a filter box (3), one end of which is fixedly connected to a feed pipe (2), and the other end of which is fixedly connected to a feed pipe (4). Two precision filters (12) are symmetrically arranged inside the filter box (3). The output and input ends of the two precision filters (12) are respectively fixedly connected to a filter pipe (13). The middle parts of the two filter pipes (13) are respectively fixedly connected to one end of the adjacent feed pipe (2) and feed pipe (4).

4. The high-efficiency vacuum pumping system for NMP according to claim 3, characterized in that, Each of the filter tubes (13) is fixedly connected to a first solenoid valve (14) at both ends.

5. The high-efficiency vacuum pumping system for NMP according to claim 3, characterized in that, One end of the feed pipe (4) is fixedly connected to the input end of the vacuum buffer tank (1), and the feed pipe (2) is fixedly connected to the incoming material direction pipe through a flange.

6. The high-efficiency vacuum pumping system for NMP according to claim 1, characterized in that, The control assembly includes a control box (5), which is fixedly connected to one side of the vacuum buffer tank (1). An electrical control integrator (17) is fixedly connected inside the control box (5). Several frequency converters (18) are electrically connected to the input terminal of the electrical control integrator (17). A control panel (16) is fixedly connected to the outside of the control box (5).

7. The high-efficiency vacuum pumping system for NMP according to claim 6, characterized in that, The electrical control integrator (17) is electrically connected to the control panel (16).

8. The high-efficiency vacuum pumping system for NMP according to claim 6, characterized in that, The frequency converter (18) is electrically connected to the vacuum pump (9), the meter (11), the precision filter (12), the first solenoid valve (14), and the second solenoid valve (15), respectively.

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