A filling device for refined NMP

Abstract

The utility model relates to the technical field of refined NMP production, especially a kind of filling equipment of refined NMP, it is not only possible to seal filling to NMP by setting this equipment, as far as possible avoid the volatile pollution environment of NMP, and volatile NMP gas can be filtered, so that it is safe production;Including four groups of vertical plate, two groups of conveying roller, conveying belt, motor, fixed frame, storage barrel, ration valve, filling head, vacuum block, lifting device and gas filter device, two groups of conveying roller are respectively rotationally installed in the inner end of left two groups of vertical plate and right two groups of vertical plate in four groups of vertical plate, two groups of conveying roller are synchronous transmission by conveying belt, motor is installed in left front vertical plate front end, motor output end passes through left front vertical plate and left side conveying roller front end connection, fixed frame is located in the upper side behind conveying belt, ration valve is installed on material pipe, lifting device is installed in fixed frame inner top end, gas filter device is installed in fixed frame inner rear upper side.

Description

Technical Field

[0001] This utility model relates to the technical field of refined NMP production, and in particular to a filling device for refined NMP. Background Technology

[0002] NMP typically refers to N-methyl-2-pyrrolidone, a polar aprotic solvent widely used in petrochemicals, plastics, pharmaceuticals, pigments, and batteries. It plays a crucial role, especially in lithium-ion battery manufacturing, as a solvent for dissolving cathode materials such as lithium cobalt oxide. "Refined NMP" may refer to NMP products that have undergone specific processing to remove impurities and improve purity. This is particularly important for applications requiring high solvent purity, such as in the production of high-performance batteries or pharmaceutical products. The refining process may include steps such as distillation, adsorption, and filtration, depending on the type of impurities in the raw materials and the desired final purity level.

[0003] In the production of lithium-ion battery cathode materials, refined NMP is widely used as an important solvent. Although NMP has a high boiling point and relatively low volatility when stored statically at room temperature and pressure, in the dynamic process of actual industrial filling operations, the high-speed injection of liquid NMP into the container through the feed tube significantly increases the gas-liquid contact area due to the impact and turbulence of the liquid flow. Simultaneously, the existing gas inside the container is rapidly displaced and expelled as the liquid level rises. All these factors inevitably lead to the release of NMP vapor into the working environment. NMP itself has a certain degree of toxicity, and long-term exposure can harm the health of operators. Furthermore, as a volatile organic compound, its release does not meet increasingly stringent VOC emission standards. Therefore, the filling operation of refined NMP places higher demands on the sealing, contamination prevention, and metering accuracy of the filling process.

[0004] Existing NMP filling equipment lacks effective sealing and gas collection and treatment methods during the filling process. The escaped NMP gas not only causes raw material waste, but also poses environmental and safety hazards. The lack of gas filtration devices is detrimental to environmental protection and safe production. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a refined NMP filling device that, by setting up this equipment, can not only seal and fill NMP to minimize the volatilization of NMP and pollute the environment, but also filter the volatilized NMP gas to ensure safe production.

[0006] This utility model discloses a filling device for refined NMP, comprising four sets of vertical plates, two sets of conveyor rollers, a conveyor belt, a motor, a fixed frame, a storage tank, a metering valve, a filling head, a vacuum block, a lifting device, and a gas filtration device. The two sets of conveyor rollers are rotatably installed at the inner ends of the left two sets of vertical plates and the right two sets of vertical plates, respectively. The two sets of conveyor rollers are synchronously driven by the conveyor belt. The motor is installed at the front end of the left front vertical plate, and the output end of the motor passes through the left front vertical plate and connects to the front end of the left conveyor roller. The fixed frame is located on the upper rear side of the conveyor belt. The storage tank is installed at the top of the fixed frame, and a guide pipe is connected to the bottom end of the storage tank. The output end of the guide pipe passes through the top of the fixed frame and connects to the filling head through the lifting device. The metering valve is installed on the guide pipe. The lifting device is installed at the top inner side of the fixed frame. The vacuum block is installed on the outside of the filling head, and the lifting device is connected to the top of the vacuum block. The gas filtration device is installed on the upper rear side inner side of the fixed frame.

[0007] Preferably, the lifting device is configured with two sets of hydraulic cylinders and a telescopic tube. The two sets of hydraulic cylinders are symmetrically installed at the bottom of the fixed frame. The two sets of hydraulic cylinders are located outside the guide tube. The output ends of the two sets of hydraulic cylinders are connected to the top of the vacuum block. The input end of the telescopic tube is connected to the output end of the guide tube. The output end of the telescopic tube is connected to the input end of the filling head.

[0008] Preferably, the gas filtration device includes an air intake hood, a first air guide pipe, a second air guide pipe, a purification chamber, an activated carbon adsorption plate, and an air pump. The air intake hood is installed obliquely on the rear side of the top of the fixed frame through the first air guide pipe. The input end of the second air guide pipe passes through the top of the fixed frame and connects to the output end of the first air guide pipe. The output end of the second air guide pipe is connected to the top of the purification chamber. The purification chamber and the air pump are both installed on the upper side of the rear end of the fixed frame. The activated carbon adsorption plate is installed inside the purification chamber. The input end of the air pump is connected to the bottom of the purification chamber.

[0009] Preferably, it also includes a fixing plate and a weighing device. The fixing plate is installed on the front side of the fixing frame and is located inside the conveyor belt. The weighing device is installed on the top of the fixing plate, and the bottom end of the weighing device is in contact with the bottom end of the conveyor belt. The weighing device corresponds to the position of the filling head.

[0010] Preferably, it also includes two sets of reinforcing ribs, with the top of the two sets of reinforcing ribs connected to the bottom of the fixing plate and the rear of the two sets of reinforcing ribs connected to the front of the fixing frame.

[0011] Preferably, the outer end of the vacuum block is provided with a downward-pointing cone shape.

[0012] Preferably, the vacuum block is made of rubber.

[0013] Preferably, the entire device is made of 304 stainless steel, and all parts that come into contact with materials meet food-grade or pharmaceutical-grade hygiene standards.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting up this device, not only can NMP be sealed and filled, minimizing the volatilization of NMP and polluting the environment, but the volatilized NMP gas can also be filtered to ensure safe production. Attached Figure Description

[0015] Figure 1 This is a first-view structural schematic diagram of the present invention; Figure 2 This is a second-view structural schematic diagram of the present invention; Figure 3 yes Figure 1 A magnified structural diagram of A in the middle; Figure 4 yes Figure 2 A magnified structural diagram of B in the diagram; The following components are labeled in the attached diagram: 1. Vertical plate; 2. Conveying roller; 3. Conveyor belt; 4. Motor; 5. Fixing frame; 6. Storage bin; 7. Guide pipe; 8. Metering valve; 9. Filling head; 10. Vacuum block; 11. Hydraulic cylinder; 12. Telescopic pipe; 13. Suction hood; 14. First air guide pipe; 15. Second air guide pipe; 16. Purification box; 17. Activated carbon adsorption plate; 18. Suction pump; 19. Fixing plate; 20. Weighing device; 21. Reinforcing rib. Detailed Implementation

[0016] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0017] like Figures 1 to 4As shown, this utility model discloses a filling device for refined NMP, comprising four sets of vertical plates 1, two sets of conveyor rollers 2, a conveyor belt 3, a motor 4, a fixed frame 5, a storage tank 6, a metering valve 8, a filling head 9, a vacuum block 10, a lifting device, and a gas filtration device. The two sets of conveyor rollers 2 are rotatably installed at the inner ends of the left and right sets of vertical plates 1, respectively. The two sets of conveyor rollers 2 are synchronously driven by the conveyor belt 3. The motor 4 is installed at the front end of the left front vertical plate 1, and its output end passes through the left front vertical plate 1 and connects to the front end of the left conveyor roller 2. The fixed frame 5 is located on the upper rear side of the conveyor belt 3. The storage tank 6 is installed at the top of the fixed frame 5, and a guide pipe 7 is connected to the bottom end of the storage tank 6. The output end of the guide pipe 7 passes through the top of the fixed frame 5 and connects to the filling head 9 via the lifting device. The metering valve 8 is installed on the guide pipe 7. The lifting device is installed at the top inner end of the fixed frame 5. The vacuum block 10 is installed on the outside of the filling head 9. The lifting device is connected to the top of the vacuum block 10, and the gas filter is installed on the upper rear side inside the fixed frame 5. The container is placed on the conveyor belt 3, and the motor 4 is turned on. The motor 4 drives the left conveyor roller 2 to rotate, and the left conveyor roller 2 drives the conveyor belt 3 to transport the container. When the container is aligned with the filling head 9, the motor 4 is turned off, and then the lifting device is turned on. The lifting device drives the filling head 9 to move downward and extend into the container. The vacuum block 10 seals the opening of the container. Then the metering valve 8 is opened, and the NMP in the storage tank 6 is filled into the container through the filling head 9 via the guide pipe 7. The gas filter recovers and filters the gas volatilized during the NMP filling process. By setting up this equipment, not only can NMP be sealed and filled, minimizing the volatilization of NMP and polluting the environment, but the volatilized NMP gas can also be filtered to ensure safe production.

[0018] As a preferred embodiment of the above, the lifting device is configured with two sets of hydraulic cylinders 11 and a telescopic tube 12. The two sets of hydraulic cylinders 11 are symmetrically installed at the bottom of the fixed frame 5. The two sets of hydraulic cylinders 11 are located outside the guide tube 7. The output ends of the two sets of hydraulic cylinders 11 are connected to the top of the vacuum block 10. The input end of the telescopic tube 12 is connected to the output end of the guide tube 7. The output end of the telescopic tube 12 is connected to the input end of the filling head 9. By setting up the hydraulic cylinders 11 and the telescopic tube 12, by opening the two sets of hydraulic cylinders 11, the two sets of hydraulic cylinders 11 drive the filling head 9 to move downward through the vacuum block 10, so that the filling head 9 extends into the container and the vacuum block 10 seals the container. This facilitates the adjustment of the height of the filling head 9 and the vacuum block 10, thereby adapting to containers of different heights.

[0019] As a preferred embodiment of the above, the gas filtration device includes an intake hood 13, a first air guide pipe 14, a second air guide pipe 15, a purification box 16, an activated carbon adsorption plate 17, and a suction pump 18. The intake hood 13 is obliquely installed on the rear side of the top of the fixing frame 5 through the first air guide pipe 14. The input end of the second air guide pipe 15 passes through the top of the fixing frame 5 and connects to the output end of the first air guide pipe 14. The output end of the second air guide pipe 15 communicates with the top of the purification box 16. The purification box 16 and the suction pump 18 are both installed on the upper rear side of the fixing frame 5. The adsorption plate 17 is installed inside the purification box 16, and the input end of the suction pump 18 is connected to the bottom of the purification box 16. By setting up the suction hood 13, the first air guide pipe 14, the second air guide pipe 15, the purification box 16, the activated carbon adsorption plate 17, and the suction pump 18, the volatile gas is introduced into the purification box 16 through the suction hood 13, the first air guide pipe 14, and the second air guide pipe 15 when the suction pump 18 is turned on. The activated carbon adsorption plate 17 then purifies the gas and discharges it through the suction pump 18, thus purifying the volatile gas.

[0020] As a preferred embodiment of the above, it also includes a fixing plate 19 and a weighing device 20. The fixing plate 19 is installed on the front side of the fixing frame 5 and is located inside the conveyor belt 3. The weighing device 20 is installed on the top of the fixing plate 19 and the bottom end of the weighing device 20 is in contact with the bottom end of the conveyor belt 3. The weighing device 20 corresponds to the position of the filling head 9. By setting the fixing plate 19 and the weighing device 20, when the container is conveyed to the bottom of the filling head 9, the weighing device 20 weighs the NMP in the container in real time, thereby improving the filling accuracy of NMP.

[0021] As a preferred embodiment of the above, it also includes two sets of reinforcing ribs 21, the top ends of the two sets of reinforcing ribs 21 being connected to the bottom end of the fixing plate 19, and the rear ends of the two sets of reinforcing ribs 21 being connected to the front end of the fixing frame 5; by setting the reinforcing ribs 21, the fixing plate 19 can be reinforced.

[0022] As a preferred embodiment of the above, the outer end of the vacuum block 10 is provided with a downward-pointing cone shape; this facilitates sealing of containers of different diameters.

[0023] As a preferred embodiment of the above, the vacuum block 10 is made of rubber; due to its softness and elasticity, the rubber material can closely fit interfaces or container openings of various shapes and surface roughness to form an effective seal.

[0024] As a preferred embodiment of the above, the entire device is made of 304 stainless steel, and all parts in contact with materials meet food-grade or pharmaceutical-grade hygiene standards. 304 stainless steel has excellent corrosion resistance, and is especially suitable for acid and alkali media and organic solvents such as NMP in chemical environments. Food-grade or pharmaceutical-grade hygiene standards can prevent material contamination and ensure product purity.

[0025] This utility model discloses a filling device for refined NMP. During operation, the container is first placed on the conveyor belt 3, and the motor 4 is turned on. The motor 4 drives the left conveyor roller 2 to rotate, which in turn drives the conveyor belt 3 to transport the container. Once the container aligns with the filling head 9, the motor 4 is turned off. Then, two sets of hydraulic cylinders 11 are turned on, which, through the vacuum block 10, drive the filling head 9 downwards, allowing it to extend into the container. The vacuum block 10 then seals the container. Next, the metering valve 8 is opened, and the NMP in the storage tank 6 is filled into the container through the filling head 9 via the guide pipe 7. Simultaneously, the suction pump 18 is turned on, and the volatile gas is introduced into the purification chamber 16 through the suction hood 13, the first air guide pipe 14, and the second air guide pipe 15. The activated carbon adsorption plate 17 purifies the gas before it is discharged through the suction pump 18.

[0026] The filling equipment for refined NMP of this utility model has common mechanical installation, connection and setting methods, and can be implemented as long as it can achieve the beneficial effect. The motor 4, hydraulic cylinder 11, suction pump 18 and weighing device 20 of the filling equipment for refined NMP of this utility model are purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual.

[0027] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A filling device for refined NMP, characterized in that, The system includes four sets of vertical plates (1), two sets of conveyor rollers (2), a conveyor belt (3), a motor (4), a fixed frame (5), a storage bin (6), a metering valve (8), a filling head (9), a vacuum block (10), a lifting device, and a gas filtration device. The two sets of conveyor rollers (2) are respectively rotatably installed on the inner ends of the two left sets of vertical plates (1) and the two right sets of vertical plates (1) in the four sets of vertical plates (1). The two sets of conveyor rollers (2) are synchronously driven by the conveyor belt (3). The motor (4) is installed at the front end of the left front vertical plate (1). The output end of the motor (4) passes through the left front vertical plate (1) and connects with the left conveyor belt. The front end of the roller (2) is connected, the fixed frame (5) is located on the rear upper side of the conveyor belt (3), the storage bucket (6) is installed on the top of the fixed frame (5), the bottom end of the storage bucket (6) is connected to the guide pipe (7), the output end of the guide pipe (7) passes through the top of the fixed frame (5) and is connected to the filling head (9) through the lifting device, the quantitative valve (8) is installed on the guide pipe (7), the lifting device is installed on the top of the fixed frame (5), the vacuum block (10) is installed on the outside of the filling head (9), the lifting device is connected to the top of the vacuum block (10), and the gas filter is installed on the rear upper side of the fixed frame (5).

2. The filling equipment for refined NMP as described in claim 1, characterized in that, The lifting device is configured with two sets of hydraulic cylinders (11) and telescopic pipes (12). The two sets of hydraulic cylinders (11) are symmetrically installed at the bottom of the fixed frame (5). The two sets of hydraulic cylinders (11) are located outside the guide pipe (7). The output end of the two sets of hydraulic cylinders (11) is connected to the top of the vacuum block (10). The input end of the telescopic pipe (12) is connected to the output end of the guide pipe (7). The output end of the telescopic pipe (12) is connected to the input end of the filling head (9).

3. The filling equipment for refined NMP as described in claim 1, characterized in that, The gas filtration device includes an air intake hood (13), a first air guide pipe (14), a second air guide pipe (15), a purification box (16), an activated carbon adsorption plate (17), and an air pump (18). The air intake hood (13) is installed at an angle on the rear side of the top of the fixed frame (5) through the first air guide pipe (14). The input end of the second air guide pipe (15) passes through the top of the fixed frame (5) and is connected to the output end of the first air guide pipe (14). The output end of the second air guide pipe (15) is connected to the top of the purification box (16). The purification box (16) and the air pump (18) are both installed on the upper side of the rear end of the fixed frame (5). The activated carbon adsorption plate (17) is installed inside the purification box (16). The input end of the air pump (18) is connected to the bottom of the purification box (16).

4. The filling equipment for refined NMP as described in claim 1, characterized in that, It also includes a fixing plate (19) and a weighing device (20). The fixing plate (19) is installed on the front side of the fixing frame (5) and is located inside the conveyor belt (3). The weighing device (20) is installed on the top of the fixing plate (19) and the bottom of the weighing device (20) is in contact with the bottom of the conveyor belt (3). The weighing device (20) corresponds to the position of the filling head (9).

5. The filling equipment for refined NMP as described in claim 4, characterized in that, It also includes two sets of reinforcing ribs (21), the top of the two sets of reinforcing ribs (21) is connected to the bottom of the fixing plate (19), and the rear end of the two sets of reinforcing ribs (21) is connected to the front end of the fixing frame (5).

6. The filling equipment for refined NMP as described in claim 1, characterized in that, The outer end of the vacuum block (10) is provided with a downward cone shape.

7. The filling equipment for refined NMP as described in claim 1, characterized in that, The vacuum block (10) is made of rubber.

8. The filling equipment for refined NMP as described in claim 1, characterized in that, The entire device is made of 304 stainless steel, and all parts that come into contact with materials meet food-grade or pharmaceutical-grade hygiene standards.

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