Efficient lithium battery NMP rapid recovery device

Abstract

The utility model provides an efficient lithium battery NMP rapid recovery device, which relates to the technical field of NMP rapid recovery and comprises a bottom plate, a heating chamber fixedly mounted at the top of the bottom plate, two heaters fixedly mounted at the bottom of the inner wall of the heating chamber, a treatment box fixedly mounted at the top of the heating chamber, and a cover plate fixedly mounted at the top of the treatment box. A driving motor is fixedly mounted at the top of the cover plate, and a driving rod is fixedly mounted at the bottom of the driving motor. According to the device disclosed by the utility model, the two heaters are started by the controller to heat the treatment box so as to evaporate the waste liquid in the treatment box, and then the driving motor is started by the controller to drive the driving rod and the plurality of stirring blades to stir the waste liquid in the treatment box so as to promote uniform distribution of heat, so that the heating efficiency is improved; meanwhile, the formation of bubbles can be accelerated by stirring, the evaporation rate can be improved, and therefore the rapid recovery efficiency of the efficient lithium battery NMP is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rapid NMP recovery, in particular to an efficient rapid NMP recovery device for lithium batteries. Background Art

[0002] In the electrode materials of lithium batteries, NMP is commonly used as a solvent to help evenly disperse the active materials in the slurry. It has good solubility and is often used in industry and laboratories. Its boiling point is about 202 °C, enabling it to remain in a liquid state under high-temperature conditions and being suitable for applications that require high-temperature processing. Since NMP is an organic solvent that is potentially harmful to the environment and the raw material cost of NMP is relatively high, rapid recovery can reduce its environmental pollution and effectively reduce production costs, improving the utilization efficiency of raw materials.

[0003] In the prior art, when rapid recovery of NMP waste liquid from high-efficiency lithium batteries is required, it is heated to the boiling point of NMP by distillation and then recovered by steam condensation. However, since the waste liquid is in a static state in the treatment tank, heat cannot be evenly distributed in the waste liquid, thereby reducing the evaporation efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem that when the existing equipment is in use, heat cannot be evenly distributed in the waste liquid because the waste liquid is in a static state in the treatment tank, and to propose an efficient rapid NMP recovery device for lithium batteries.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: An efficient rapid NMP recovery device for lithium batteries, including a bottom plate. A heating chamber is fixedly installed at the top of the bottom plate. Two heaters are fixedly installed at the bottom of the inner wall of the heating chamber. A treatment tank is fixedly installed at the top of the heating chamber. A cover plate is fixedly installed at the top of the treatment tank. A driving motor is fixedly installed at the top of the cover plate. A driving rod is fixedly installed at the bottom of the driving motor, and the outer surface of the driving rod is movably inserted into the interior of the cover plate. A plurality of stirring blades are fixedly installed on the outer surface of the driving rod. A first temperature sensor is fixedly installed on one side of the inner wall of the treatment tank.

[0006] Preferably, a controller is fixedly installed on one side of the outer wall of the treatment tank, and one side of the outer wall of the controller is electrically connected to the outer surfaces of the two heaters, the driving motor, and the first temperature sensor.

[0007] Preferably, a cold water tank is fixedly installed at the top of the bottom plate, and a second temperature sensor is fixedly installed on one side of the inner wall of the cold water tank.

[0008] Preferably, two collection boxes are fixedly installed at the bottom of the inner wall of the cold water tank, and round covers are fixedly installed at the tops of the two collection boxes.

[0009] Preferably, steam pipes are fixedly inserted into the tops of the two round covers, and the input ends of the two steam pipes are communicated with the inside of the treatment tank.

[0010] Preferably, control valves are fixedly installed on the outer walls of the two steam pipes.

[0011] Preferably, a water outlet pipe is fixedly inserted into one side of the outer wall of the cold water tank, and a drain valve is fixedly installed on the outer wall of the water outlet pipe.

[0012] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.

[0013] In the present utility model, two heaters are started by a controller to heat the treatment tank, thereby evaporating the waste liquid inside. Then, the drive motor is started by the controller to drive the drive rod and a plurality of stirring blades to stir the waste liquid inside the treatment tank, promoting the uniform distribution of heat, thereby improving the heating efficiency and preventing local overheating of the liquid surface. At the same time, stirring can accelerate the formation of bubbles, which helps to improve the evaporation rate, thereby improving the efficiency of rapid recovery of NMP for high-performance lithium batteries.

[0014] In the present utility model, when the two heaters heat the treatment tank, the liquid in the waste liquid with a boiling point lower than that of NMP will evaporate first. At this time, one of the control valves is opened, and it enters the collection tank along one of the steam pipes. Then, under the action of the first temperature sensor, when the temperature in the treatment tank reaches the boiling point temperature of NMP, one of the control valves is closed, and the other control valve is opened, so that the NMP steam enters the other collection tank along the other steam pipe. Then, under the action of the cold water tank, the steam in the two collection tanks is turned into liquid and recycled, improving the recycling efficiency. Secondly, under the action of the second temperature sensor, when the temperature in the cold water tank reaches a certain value, the drain valve is opened to drain the water inside, and then an appropriate amount of cold water is added to ensure the condensation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of the rapid recovery device for NMP of high-performance lithium batteries proposed by the present utility model;

[0016] Figure 2 is a front view of the rapid recovery device for NMP of high-performance lithium batteries proposed by the present utility model;

[0017] Figure 3 is a partial exploded view of the rapid recovery device for NMP of high-performance lithium batteries proposed by the present utility model;

[0018] Figure 4 is a partial unfolded schematic diagram of the rapid recovery device for NMP of high-performance lithium batteries proposed by the present utility model.

[0019] Legend Explanation:

[0020] Base plate; 2. Heating chamber; 3. Heater; 4. Processing box; 5. Cover plate; 6. Driving motor; 7. Driving rod; 8. Stirring blade; 9. First temperature sensor; 10. Controller; 11. Cold water tank; 12. Second temperature sensor; 13. Collection box; 14. Round cover; 15. Steam pipe; 16. Control valve; 17. Water outlet pipe; 18. Drain valve. Specific Embodiment

[0021] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed in the following specification.

[0023] Embodiment 1: As Figures 1 - 4 shown, the present invention provides a high-efficiency NMP rapid recovery device for lithium batteries, including a base plate 1. A heating chamber 2 is fixedly installed on the top of the base plate 1. Two heaters 3 are fixedly installed on the bottom of the inner wall of the heating chamber 2. A processing box 4 is fixedly installed on the top of the heating chamber 2. A cover plate 5 is fixedly installed on the top of the processing box 4. A driving motor 6 is fixedly installed on the top of the cover plate 5. A driving rod 7 is fixedly installed on the bottom of the driving motor 6, and the outer surface of the driving rod 7 is movably inserted into the inside of the cover plate 5. A plurality of stirring blades 8 are fixedly installed on the outer surface of the driving rod 7. A first temperature sensor 9 is fixedly installed on one side of the inner wall of the processing box 4. A controller 10 is fixedly installed on one side of the outer wall of the processing box 4, and one side of the outer wall of the controller 10 is electrically connected to the outer surfaces of the two heaters 3, the driving motor 6 and the first temperature sensor 9.

[0024] The effect achieved by the entire Embodiment 1 is that when the NMP waste liquid is added into the treatment tank 4, since the controller 10, the two heaters 3, the drive motor 6, the first temperature sensor 9, the second temperature sensor 12, and the two control valves 16 are all electrically connected, the two heaters 3 installed in the heating chamber 2 are started through the controller 10 to continuously heat the NMP waste liquid in the treatment tank 4. Then, the drive motor 6 installed on the cover plate 5 is started through the controller 10 to drive the drive rod 7 and the plurality of stirring blades 8 to rotate in the waste liquid and stir the waste liquid, promoting the uniform distribution of heat, thereby improving the heating efficiency and preventing local overheating of the liquid surface. At the same time, stirring can accelerate the formation of bubbles, helping to improve the evaporation rate, thus improving the efficiency of rapid recovery of NMP for high-performance lithium batteries.

[0025] Embodiment 2: As Figures 2 - 4 shown, a cold water tank 11 is fixedly installed on the top of the bottom plate 1. A second temperature sensor 12 is fixedly installed on one side of the inner wall of the cold water tank 11. Two collection tanks 13 are fixedly installed on the bottom of the inner wall of the cold water tank 11. Circular covers 14 are fixedly installed on the tops of the two collection tanks 13. Steam pipes 15 are fixedly inserted through the tops of the two circular covers 14. The input ends of the two steam pipes 15 are both communicated with the inside of the treatment tank 4. Control valves 16 are fixedly installed on the outer surfaces of the two steam pipes 15. An outlet pipe 17 is fixedly inserted through one side of the outer wall of the cold water tank 11. A drain valve 18 is fixedly installed on the outer surface of the outlet pipe 17.

[0026] The effect achieved by the entire Embodiment 2 is that when the two heaters 3 continuously heat the waste liquid in the treatment tank 4, the liquid with a boiling point lower than that of NMP will evaporate in advance. At this time, the control valve 16 on one of the steam pipes 15 is started through the controller 10, so that the steam of the low-boiling-point liquid enters the collection tank 13 along one of the steam pipes 15. Since the first temperature sensor 9 is installed on one side of the inner wall of the treatment tank 4, through the function of the first temperature sensor 9, when the temperature in the treatment tank 4 reaches the boiling point of NMP, one of the control valves 16 is closed through the controller 10, and then the control valve 16 on the other steam pipe 15 is opened, so that the NMP steam enters the other collection tank 13 along the other steam pipe 15, avoiding the interference of the low-boiling-point liquid and improving the quality of rapid recovery of NMP steam. Secondly, the two collection tanks 13 are both located in the cold water tank 11. By contacting the cold water with the two treatment tanks 4, the steam inside is converted into liquid, and the rapid recovery of NMP is completed. When the second temperature sensor 12 detects that the water temperature in the cold water tank 11 is higher than the set value, the drain valve 18 is opened to drain the water along the outlet pipe 17, and then an appropriate amount of cold water is added to the cold water tank 11 to ensure the condensation effect on the steam, further improving the use effect of the rapid recovery device for NMP of high-performance lithium batteries.

[0027] Working principle: First, place the NMP waste liquid of high-efficiency lithium batteries in the treatment tank 4. Start two heaters 3 through the controller 10 to heat the NMP waste liquid of high-efficiency lithium batteries in the treatment tank 4. Then start the drive motor 6 through the controller 10 to drive the drive rod 7 and multiple stirring blades 8 to stir the NMP waste liquid, promoting the uniform distribution of heat in the waste liquid, improving the heating efficiency, and preventing local overheating of the liquid surface. Since the temperature is continuously rising and the boiling point has not reached the boiling point of NMP at this time, open one of the control valves 16 through the controller 10, so that the steam below the boiling point of NMP enters one of the collection tanks 13 along one of the steam pipes 15. Then, under the action of the first temperature sensor 9, when the temperature in the treatment tank 4 rises to the boiling point of NMP, close one of the control valves 16 and open the other control valve 16 through the controller 10, so that the NMP steam enters the other collection tank 13 along the other steam pipe 15, effectively avoiding the interference of low-boiling-point liquids on the collection of NMP steam. And both collection tanks 13 are located in the cold water tank 11. The cold water therein can effectively replace the water in the cold water tank 11 regularly under the action of the second temperature sensor 12, the water outlet pipe 17 and the drain valve 18, ensuring the condensation effect of the steam in the two collection tanks 13. Generally speaking, the efficiency of collecting the NMP waste liquid of high-efficiency lithium batteries is improved, thus improving the use effect of the high-efficiency lithium battery NMP rapid recovery device.

[0028] The above is only the preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. An efficient NMP rapid recovery device for lithium batteries, comprising a bottom plate (1), characterized in that: The top of the bottom plate (1) is fixedly installed with a heating chamber (2). The bottom of the inner wall of the heating chamber (2) is fixedly installed with two heaters (3). The top of the heating chamber (2) is fixedly installed with a treatment box (4). The top of the treatment box (4) is fixedly installed with a cover plate (5). The top of the cover plate (5) is fixedly installed with a driving motor (6). The bottom of the driving motor (6) is fixedly installed with a driving rod (7), and the outer wall of the driving rod (7) is movably inserted into the inside of the cover plate (5). The outer wall of the driving rod (7) is fixedly installed with a plurality of stirring blades (8). One side of the inner wall of the treatment box (4) is fixedly installed with a first temperature sensor (9).

2. The high-efficiency lithium battery NMP rapid recovery device according to claim 1, characterized in that: One side of the outer wall of the treatment box (4) is fixedly installed with a controller (10), and one side of the outer wall of the controller (10) is electrically connected to the outer walls of the two heaters (3), the driving motor (6) and the first temperature sensor (9).

3. The high-efficiency NMP rapid recovery device for lithium batteries according to claim 2, characterized in that: The top of the bottom plate (1) is fixedly installed with a cold water tank (11). One side of the inner wall of the cold water tank (11) is fixedly installed with a second temperature sensor (12).

4. The high-efficiency NMP rapid recovery device for lithium batteries according to claim 3, wherein: The bottom of the inner wall of the cold water tank (11) is fixedly installed with two collection boxes (13). The tops of the two collection boxes (13) are fixedly installed with round covers (14).

5. The high-efficiency NMP rapid recovery device for lithium batteries according to claim 4, wherein: The tops of the two round covers (14) are fixedly inserted with steam pipes (15), and the input ends of the two steam pipes (15) are communicated with the inside of the treatment box (4).

6. The high-efficiency NMP rapid recovery device for lithium batteries according to claim 5, characterized in that: Control valves (16) are fixedly installed on the outer walls of the two steam pipes (15).

7. The high-efficiency NMP rapid recovery device for lithium batteries according to claim 6, characterized in that: One side of the outer wall of the cold water tank (11) is fixedly inserted with a water outlet pipe (17). A drain valve (18) is fixedly installed on the outer wall of the water outlet pipe (17).

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