Gas purging device for removing water from NMP (N-Methyl Pyrrolidone) solution

Abstract

The utility model belongs to the technical field of purging, and particularly relates to a gas purging device for removing water from an NMP (N-Methyl Pyrrolidone) solution, which comprises a device main body, a main vertical rod is fixedly connected to the axis of the upper side of the device main body, a plurality of placing holes are formed in the upper side of the device main body and positioned on the peripheral side of the main vertical rod, and a gas pump is fixedly connected to the upper end of the main vertical rod. A first electric push rod is fixedly connected to the outer side of the main vertical rod, a piston rod of the first electric push rod is fixedly connected with a first mounting disc slidably connected to the outer side of the main vertical rod, a plurality of first-stage air needles are fixedly connected to the first mounting disc, and the first-stage air needles and the placing holes are in one-to-one correspondence; the upper end of the first-stage air needle is communicated with the air pump through a first air guide hose, and the lower end of the first-stage air needle is communicated with a plurality of second-stage air needles through a plurality of second air guide hoses. According to the NMP solution gas purging device, gas purging can be uniformly carried out on the liquid level of an NMP solution in containers with different diameters.

Description

Technical Field

[0001] This utility model belongs to the field of purging technology, specifically relating to a gas purging device for dehydrating NMP solution. Background Technology

[0002] N-Methylpyrrolidone (NMP), a high-boiling-point, highly polar organic solvent with excellent performance, has wide applications in many fields such as electronics, chemicals, and pharmaceuticals. For example, in lithium battery production, NMP is a key solvent for electrode slurries, and its purity and water content have a crucial impact on battery performance; in electronic material manufacturing, NMP is often used in processes such as cleaning and photoresist removal.

[0003] However, NMP is highly hygroscopic and easily absorbs moisture during storage and use. The presence of moisture significantly reduces the performance and quality of NMP. In lithium-ion battery production, excessive moisture can lead to decreased stability of the electrode slurry, affecting electrode coating quality and battery electrochemical performance. In electronic material manufacturing, moisture may trigger chemical reactions, reducing product reliability and yield. Therefore, dehydration of the NMP solution is a crucial step in ensuring its effective application.

[0004] Currently, gas purging is a commonly used method for removing water from NMP solutions. Its principle is to introduce dry gas into the NMP solution, reducing the partial pressure of water vapor at the solution surface and promoting water evaporation, thereby achieving dehydration. However, existing gas purging devices have certain limitations in practical applications. Many devices have a fixed needle layout, only suitable for containers of specific diameters. When treating NMP solutions in containers of different diameters, the needles cannot evenly cover the solution surface, resulting in uneven gas purging and poor dehydration. Furthermore, some NMP solutions at the edges of the container may not receive sufficient gas purging, leaving residual moisture and affecting the final quality of the NMP. Utility Model Content

[0005] The purpose of this invention is to provide a gas purging device for dehydrating NMP solution, which can perform gas purging on the surface of NMP solution inside containers of different diameters in a relatively uniform manner.

[0006] The specific technical solution adopted by this utility model is as follows:

[0007] A gas purging device for dehydrating NMP solution includes a device body, a main upright rod fixedly connected to the axis on the upper side of the device body, a plurality of placement holes being opened on the upper side of the device body and around the main upright rod, and an air pump being fixedly connected to the upper end of the main upright rod.

[0008] A first electric push rod is fixedly connected to the outside of the main upright. A first mounting plate that is slidably connected to the piston rod of the first electric push rod is fixedly connected to the piston rod of the first electric push rod. A plurality of primary air needles are fixedly connected to the first mounting plate. The primary air needles and the placement holes are one to one. The upper end of the primary air needles is connected to the air pump through a first air guide hose.

[0009] The lower end of the primary air needle is connected to multiple secondary air needles through multiple second air guide hoses. The multiple secondary air needles are arranged in a circular array around the axis of the primary air needle. The lower end of the primary air needle is fixedly connected to an adjustment group connected to the secondary air needles. The adjustment group is used to adjust the distance between the secondary air needles and the primary air needles.

[0010] Furthermore, the adjustment assembly includes a guide rail fixedly connected to the lower outer side of the primary air needle, a slider slidably connected inside the guide rail, the secondary air needle fixedly connected to one side of the slider, a threaded rod rotatably connected inside the guide rail, the threaded rod and the slider being threadedly connected, a transmission motor fixedly connected to one end of the guide rail, and the output end of the transmission motor being fixedly connected to the threaded rod.

[0011] Furthermore, an air outlet is fixedly connected to the lower end of the secondary air needle, and an air outlet is provided at the lower end of the air outlet. The straight line between the center position of the air outlet opening and the axis of the primary air needle is the center line of the opening. The length direction of the air outlet opening is parallel to the center line of the opening, and the axis of the air outlet and the axis of the secondary air needle are vertically overlapped. The opening length of the air outlet is adjustable.

[0012] Furthermore, the air outlet includes a top plate of the air outlet fixedly connected to the lower end of the secondary air needle. The top plate of the air outlet is provided with air outlet side plates on both sides. A crease line is provided between the air outlet side plates and the top plate of the air outlet. A side telescopic baffle is fixedly connected between the same side of the two air outlet side plates. The lower opening between the air outlet side plates and the side telescopic baffle is the air outlet.

[0013] The gas purging device also includes a tilt angle adjustment group that is driven to the lower end of the nozzle side plate.

[0014] Furthermore, the tilt angle adjustment group includes a hanger slidably connected to the outside of the secondary air needle. Two pull ropes are fixedly connected to both ends of the hanger. The lower ends of the two pull ropes are fixedly connected to the ends of the two air nozzle side plates that are far apart from each other. The gas purging device also includes a lifting group that is drivenly connected to the hanger. A tension rope is fixedly connected between the two air nozzle side plates.

[0015] Furthermore, the lifting assembly includes a second electric push rod and a second mounting plate. A sleeve that is slidably connected to the outside of the main upright is fixedly connected to the first mounting plate. The second electric push rod is fixedly connected to the outside of the sleeve. The second mounting plate is vertically slidably connected to the outside of the sleeve. The piston rod of the second electric push rod is fixedly connected to the second mounting plate. Multiple connecting rods are fixedly connected to the second mounting plate. A lifting ring that is vertically slidably connected to the outside of the first-stage air needle is fixedly connected to the connecting rod. Multiple horizontal guides are fixedly connected to the periphery of the lifting ring. Multiple hangers slide on multiple horizontal guides respectively.

[0016] The technical effects achieved by this utility model are as follows:

[0017] This invention relates to a gas purging device for dehydrating NMP solution. By adjusting the distance between multiple secondary gas needles and primary gas needles, the diameter of the multiple secondary gas needle assembly can be controlled, allowing the multiple secondary gas needles to adapt to containers of different diameters. This ensures that the multiple secondary gas needles are evenly distributed inside the containers containing NMP solution, thereby achieving relatively uniform gas purging of the NMP solution surface inside containers of different diameters. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a side view of the structure of this utility model;

[0020] Figure 3 This is a partial structural schematic diagram of the present invention;

[0021] Figure 4 This is a cross-sectional structural diagram of the air outlet of this utility model.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Main body of the device; 2. Placement hole; 3. Main upright; 4. Air pump; 5. First air guide hose; 6. First mounting plate; 7. First electric push rod; 8. First-stage air needle; 9. Second-stage air needle; 10. Nozzle top plate; 11. Nozzle side plate; 12. Side telescopic baffle; 13. Guide rail; 14. Transmission motor; 15. Threaded rod; 16. Slider; 17. Pull rope; 18. Hanger; 19. Horizontal guide; 20. Lifting ring; 21. Connecting rod; 22. Second mounting plate; 23. Second electric push rod; 24. Sleeve; 25. Second air guide hose; 26. Pull rope. Detailed Implementation

[0024] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0025] like Figures 1-4 As shown, a gas purging device for dehydrating NMP solution includes a device body 1. A main support rod 3 is fixedly connected to the axis on the upper side of the device body 1. Multiple placement holes 2 are opened on the upper side of the device body 1 and around the main support rod 3. A container storing NMP solution can be placed inside the placement holes 2. The device body 1 can also be equipped with a device for water bath heating of the NMP solution inside the container.

[0026] The container has an opening on the top side. In order to purge the NMP solution inside the container with gas from above, the upper end of the main support rod 3 is fixedly connected to an air pump 4. The air inlet of the air pump 4 is connected to a storage mechanism for storing inert gas through an air inlet pipe. The gas stored can be nitrogen or argon.

[0027] A first electric push rod 7 is fixedly connected to the outside of the main upright 3. A first mounting plate 6, which is slidably connected to the piston rod of the first electric push rod 7, is fixedly connected to the piston rod of the first electric push rod 7. Multiple first-stage gas needles 8 are fixedly connected to the first mounting plate 6. The first-stage gas needles 8 are one-to-one with the placement holes 2. By activating the first electric push rod 7, the first-stage gas needles 8 can be raised and lowered. The height of the first-stage gas needles 8 can be adjusted to control the distance between the first-stage gas needles 8 and the NMP solution level inside the container. The upper end of the first-stage gas needles 8 is connected to the air pump 4 through a first air guide hose 5, thereby completing the gas transmission.

[0028] The lower end of the primary gas needle 8 is connected to multiple secondary gas needles 9 via multiple second gas guide hoses 25. The multiple secondary gas needles 9 are arranged in a ring array around the primary gas needle 8 with the axis of the primary gas needle 8 as the center. The lower end of the primary gas needle 8 is fixedly connected to an adjustment group connected to the secondary gas needles 9. The adjustment group is used to adjust the distance between the secondary gas needles 9 and the primary gas needle 8. At this time, by adjusting the distance between the multiple secondary gas needles 9 and the primary gas needle 8, the diameter of the multiple secondary gas needles 9 assembly can be controlled, so that the multiple secondary gas needles 9 can be adapted to containers of different diameters. This allows the multiple secondary gas needles 9 to be evenly distributed inside the container storing NMP solution, thereby purging the NMP solution surface inside containers of different diameters with gas in a relatively uniform manner.

[0029] like Figures 1-3As shown, the adjustment assembly includes a guide rail 13 fixedly connected to the lower outer side of the primary air needle 8. A slider 16 is slidably connected inside the guide rail 13. The secondary air needle 9 is fixedly connected to one side of the slider 16. By adjusting the position of the slider 16, the secondary air needle 9 can be driven to slide. A threaded rod 15 is rotatably connected inside the guide rail 13. The threaded rod 15 is threadedly connected to the slider 16. At this time, the position of the slider 16 can be adjusted by rotating the threaded rod 15, and the position of the slider 16 can be locked after adjustment. A transmission motor 14 is fixedly connected to one end of the guide rail 13. The output end of the transmission motor 14 is fixedly connected to the threaded rod 15, so that the position of the slider 16 can be controlled in conjunction with the electrical control equipment.

[0030] Meanwhile, the lower end of the secondary air needle 9 is fixedly connected to an air outlet, and the lower end of the air outlet is provided with an air outlet. The straight line between the center position of the air outlet opening and the axis of the primary air needle 8 is the center line of the opening. The length direction of the air outlet opening is parallel to the center line of the opening, and the axis of the air outlet and the axis of the secondary air needle 9 are vertically overlapped. The opening length of the air outlet is adjustable, so that the opening length of the air outlet can be adapted to the container, further improving the uniformity of the air output.

[0031] Specifically, such as Figures 2-4 As shown, the air outlet includes a top plate 10 fixedly connected to the lower end of the secondary air needle 9. Side plates 11 are provided on both sides of the top plate 10. A crease line is provided between the side plates 11 and the top plate 10, so that the side plates 11 can be folded and rotated at one end of the top plate 10. A side telescopic baffle 12 is fixedly connected between the same side of the two side plates 11. The side telescopic baffle 12 can be a latex sheet or a plate with a telescopic structure. The lower opening between the side plates 11 and the side telescopic baffle 12 is the air outlet. The opening length of the air outlet can be adjusted by rotating the side plates 11.

[0032] like Figures 2-4 As shown, in order to control the movement of the nozzle side plate 11, the gas purging device also includes a tilt angle adjustment group that is drivenly connected to the lower end of the nozzle side plate 11. The tilt angle adjustment group includes a hanger 18 that is slidably connected to the outside of the secondary air needle 9. Two pull ropes 17 are fixedly connected to both ends of the hanger 18. The lower ends of the two pull ropes 17 are fixedly connected to the ends of the two nozzle side plates 11 that are far apart from each other. At this time, the pull ropes 17 can be pulled by vertically sliding the hanger 18 to adjust the tilt angle of the nozzle side plate 11 and drive the nozzle side plate 11 to rotate outward. A tension rope 26 is fixedly connected between the two nozzle side plates 11. The tension rope 26 can drive the nozzle side plate 11 to reset.

[0033] Meanwhile, the tension rope 26, which drives the two nozzle side plates 11 to retract and reset, can also be replaced by a tension spring.

[0034] To drive the hanger 18 to move vertically, the gas purging device also includes a lifting assembly connected to the hanger 18. The lifting assembly includes a second electric push rod 23 and a second mounting plate 22. A sleeve 24, which is slidably connected to the outside of the main upright 3, is fixedly connected to the first mounting plate 6. The second electric push rod 23 is fixedly connected to the outside of the sleeve 24. The second mounting plate 22 is vertically slidably connected to the outside of the sleeve 24. The piston rod of the second electric push rod 23 is fixedly connected to the second mounting plate 22. At this time, by activating the second electric push rod 23... 3 can drive the second mounting plate 22 to move vertically. Multiple connecting rods 21 are fixedly connected to the second mounting plate 22. A lifting ring 20 that is vertically slidably connected to the outside of the first-stage air needle 8 is fixedly connected to the connecting rod 21. Multiple horizontal guides 19 are fixedly connected to the periphery of the lifting ring 20. Multiple hangers 18 slide on the multiple horizontal guides 19 respectively. At this time, when the second-stage air needle 9 moves, it will drive the hangers 18 to move together. When the second mounting plate 22 moves up and down, it will drive the multiple hangers 18 to move up and down synchronously through the horizontal guides 19.

[0035] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A gas purging device for dehydrating NMP solution, characterized in that: The device includes a main body (1), a main support rod (3) is fixedly connected to the axis on the upper side of the main body (1), a plurality of placement holes (2) are opened on the upper side of the main body (1) and on the periphery of the main support rod (3), and an air pump (4) is fixedly connected to the upper end of the main support rod (3). The main support rod (3) is fixedly connected to the outside of a first electric push rod (7). The piston rod of the first electric push rod (7) is fixedly connected to a first mounting plate (6) that is slidably connected to the outside of the main support rod (3). Multiple first-stage air needles (8) are fixedly connected to the first mounting plate (6). The first-stage air needles (8) and the placement holes (2) are opposite to each other. The upper end of the first-stage air needles (8) and the air pump (4) are connected through a first air guide hose (5). The lower end of the primary air needle (8) is connected to multiple secondary air needles (9) through multiple second air guide hoses (25). The multiple secondary air needles (9) are arranged in a ring array around the primary air needle (8) with the axis of the primary air needle (8) as the periphery. The lower end of the primary air needle (8) is fixedly connected to an adjustment group connected to the secondary air needles (9). The adjustment group is used to adjust the distance between the secondary air needles (9) and the primary air needle (8).

2. The gas purging device for dehydrating NMP solution according to claim 1, characterized in that: The adjustment group includes a guide rail (13) fixedly connected to the lower outer side of the first-stage air needle (8). A slider (16) is slidably connected inside the guide rail (13). The second-stage air needle (9) is fixedly connected to one side of the slider (16). A threaded rod (15) is rotatably connected inside the guide rail (13). The threaded rod (15) and the slider (16) are threadedly connected. A transmission motor (14) is fixedly connected to one end of the guide rail (13). The output end of the transmission motor (14) is fixedly connected to the threaded rod (15).

3. The gas purging device for dehydrating NMP solution according to claim 2, characterized in that: The lower end of the secondary air needle (9) is fixedly connected to an air outlet. The lower end of the air outlet is provided with an air outlet. The straight line between the center position of the air outlet opening and the axis of the primary air needle (8) is the center line of the opening. The length direction of the air outlet opening is parallel to the center line of the opening, and the axis of the air outlet and the axis of the secondary air needle (9) are vertically overlapped. The opening length of the air outlet is adjustable.

4. The gas purging device for dehydrating NMP solution according to claim 3, characterized in that: The air outlet includes a top plate (10) fixedly connected to the lower end of the secondary air needle (9). The top plate (10) has side plates (11) on both sides. A crease line is provided between the side plates (11) and the top plate (10). A side telescopic baffle (12) is fixedly connected between the same side of the two side plates (11). The lower opening between the side plates (11) and the side telescopic baffle (12) is the air outlet. The gas purging device also includes a tilt angle adjustment group that is driven to the lower end of the nozzle side plate (11).

5. A gas purging device for dehydrating NMP solution according to claim 4, characterized in that: The tilt angle adjustment group includes a hanger (18) slidably connected to the outside of the secondary air needle (9). Two pull ropes (17) are fixedly connected to both ends of the hanger (18). The lower ends of the two pull ropes (17) are fixedly connected to the ends of the two air nozzle side plates (11) that are far apart from each other. The gas purging device also includes a lifting group that is drivenly connected to the hanger (18). A tension rope (26) is fixedly connected between the two air nozzle side plates (11).

6. The gas purging device for dehydrating NMP solution according to claim 5, characterized in that: The lifting assembly includes a second electric push rod (23) and a second mounting plate (22). A sleeve (24) is fixedly connected to the first mounting plate (6) and slidably connected to the outside of the main upright (3). The second electric push rod (23) is fixedly connected to the outside of the sleeve (24). The second mounting plate (22) is vertically slidably connected to the outside of the sleeve (24). The piston rod of the second electric push rod (23) is fixedly connected to the second mounting plate (22). Multiple connecting rods (21) are fixedly connected to the second mounting plate (22). A lifting ring (20) is vertically slidably connected to the connecting rod (21) and slidably connected to the outside of the first-stage air needle (8). Multiple horizontal guides (19) are fixedly connected to the periphery of the lifting ring (20). Multiple hangers (18) slide on multiple horizontal guides (19) respectively.

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