A slurry waste liquid recovers NMP system

Abstract

The utility model provides a kind of slurry waste liquid recovery NMP system, by ton barrel unloading to slurry barrel with unqualified product, it is delivered to drying machine by pneumatic diaphragm pump, drying mixer is under the condition of heat conduction oil heating, material is divided into two kinds of form of gas phase and solid phase.Gas phase enters circulating water condenser by vacuum dehumidification port, and liquefies after completing heat exchange with circulating water in condenser, enters NMP collection tank, liquefied NMP is extracted by bottom and is barrelled, non-condensing steam is extracted by vacuum pump and then enters tail gas treatment system;When material drying is completed, solid phase carbon powder is discharged by buffer tank lower discharge port and is barrelled.The present slurry waste liquid recovery NMP system is simple in structure, low in processing cost, and can realize high-quality recovery.

Description

Technical Field

[0001] This utility model relates to the field of NMP recovery technology, and in particular to a slurry waste liquid NMP recovery system. Background Technology

[0002] N-Methylpyrrolidone (NMP) is a highly polar aprotic solvent. It appears as a colorless, transparent or slightly yellow oily liquid with a slight amine odor and is mildly irritating to the skin.

[0003] NMP belongs to nitrogen heterocyclic compounds and possesses a series of excellent physical and chemical properties. It is a highly efficient and selective solvent that is non-toxic, has a high boiling point, strong polarity, low viscosity, low corrosiveness, high solubility, low volatility, good stability, and is easily recyclable. It is widely used in petrochemical, pesticide, pharmaceutical, and electronic materials industries.

[0004] With the rapid development of new energy vehicles in China, NMP, as an essential chemical in the lithium battery production process, is being used more and more widely. Currently, the treatment of recycled NMP waste liquid is costly and involves complicated steps, resulting in inconsistent quality. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a slurry waste liquid recovery NMP system, which solves the technical problems of high treatment costs, cumbersome procedures, and inconsistent quality of recovered NMP waste liquid in existing technologies.

[0006] This utility model provides a slurry waste liquid recovery NMP system, including:

[0007] Slurry tank unit, stirring vacuum unit, and condensation unit;

[0008] The slurry tank unit includes a slurry tank, one end of which is connected to a ton tank via an input pump, and the other end of which is connected to a stirring vacuum unit via an output pump.

[0009] The stirring vacuum unit includes a support frame, and a drying mixer is provided on the top of the support frame. The top of the drying mixer is provided with a vacuum dehumidification port and a slurry waste liquid inlet. The slurry waste liquid inlet is connected to the output end of the output pump. A vacuum gauge and a thermometer are also provided on the side of the drying mixer near the inlet. Lifting rings are provided at both ends of the drying mixer near the top. A reducer is provided at either end of the drying mixer. The transmission gear of the reducer passes through the drying mixer. A bearing seat and a rotary joint are provided in sequence at the end of the transmission gear away from the reducer. The rotary joint is connected to an oil outlet and an oil inlet. A residue discharge port is connected to either side of the bottom of the drying mixer.

[0010] The condensation unit includes a circulating water condenser. The top of the circulating water condenser is connected to the slurry waste liquid inlet via a vacuum hose. The circulating water condenser has a heat exchange water inlet and a heat exchange water outlet on its periphery. The bottom of the circulating water condenser is connected to one side of the top of the buffer tank. The other side of the top of the buffer tank is connected to a vacuum pump via a vacuum tube.

[0011] Optionally, the input pump and the output pump include:

[0012] All use pneumatic diaphragm pumps.

[0013] Optionally, the drying mixer includes:

[0014] Its vacuum level is -60 to -90 kPa.

[0015] Optionally, the drying mixer includes:

[0016] Its heating temperature is 140-190℃.

[0017] Optionally, the drying mixer includes a spare port on the side of its bottom away from the residue discharge port.

[0018] Optionally, the drying mixer further includes:

[0019] The drying mixer is equipped with lifting rings at both ends near the top.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] Non-conforming products are loaded and unloaded from ton containers into slurry tanks, then transported to the dryer via a pneumatic diaphragm pump. The dryer, heated by heat transfer oil, separates the material into gaseous and solid phases. The gaseous phase enters the circulating water condenser through a vacuum dehumidification port, where it liquefies after heat exchange with the circulating water and enters the NMP collection tank. The liquefied NMP is extracted from the bottom and stored in drums. Non-condensable vapors are extracted by a vacuum pump and enter the exhaust gas treatment system. After the material is dried, the solid carbon powder is discharged from the bottom outlet of the buffer tank and stored in drums. This slurry waste liquid NMP recovery system has a simple structure, low processing cost, and can achieve high-quality recovery. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Explanation of icon numbers:

[0024] 1. Tonnage container; 2. Input pump; 3. Slurry tank; 4. Output pump; 5. Support frame; 6. Drying mixer; 7. Vacuum dehumidification port; 8. Slurry waste liquid inlet; 9. Vacuum gauge; 10. Thermometer; 11. Reducer; 12. Transmission gear; 13. Bearing housing; 14. Rotary joint; 15. Oil inlet; 16. Oil outlet; 17. Residue discharge port; 18. Circulating water condenser; 19. Vacuum hose; 20. Buffer tank; 21. Vacuum tube; 22. Vacuum pump; 23. Spare port; 24. Lifting ring.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solutions of this utility model are further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.

[0027] See Figure 1 This utility model provides a slurry waste liquid recovery NMP system, comprising:

[0028] Slurry tank unit, stirring vacuum unit, and condensation unit;

[0029] The slurry tank unit includes a slurry tank 3, one end of which is connected to a ton tank 1 via an input pump 2, and the other end of which is connected to a stirring vacuum unit via an output pump 4.

[0030] The stirring vacuum unit includes a support frame 5, and a drying mixer 6 is provided on the top of the support frame 5. The top of the drying mixer 6 is provided with a vacuum dehumidification port 7 and a slurry waste liquid inlet 8. The slurry waste liquid inlet 8 is connected to the output end of the output pump 4. A vacuum gauge 9 and a thermometer 10 are also provided on the side of the drying mixer 6 near the inlet. Both ends of the drying mixer 6 near the top are provided with lifting rings 24. A reducer 11 is provided at either end of the drying mixer 6. The transmission gear 12 of the reducer 11 passes through the drying mixer 6. A bearing seat 13 and a rotary joint 14 are provided in sequence at the end of the transmission gear 12 away from the reducer 11. The rotary joint 14 is connected to an oil outlet 16 and an oil inlet 15. A residue discharge port 17 is connected to either side of the bottom of the drying mixer 6.

[0031] The condensation unit includes a circulating water condenser 18. The top of the circulating water condenser 18 is connected to the slurry waste liquid inlet 8 via a vacuum hose 19. The circulating water condenser 18 has a heat exchange inlet and a heat exchange outlet on its periphery. The bottom of the circulating water condenser 18 is connected to one side of the top of the buffer tank 20. The other side of the top of the buffer tank 20 is connected to a vacuum pump 22 via a vacuum tube 21.

[0032] Referring to the figure, in this embodiment, the cleaning liquid and the non-conductive slurry are loaded and unloaded into the slurry tank 3 through the input pump 2 at one end of the slurry tank 3. The output pump 4 at the other end of the slurry tank 3 is used to pump the slurry waste liquid into the stirring vacuum unit. The slurry waste liquid enters the drying mixer 6 through the slurry waste liquid inlet 8. The slurry is stirred by the rotation of the transmission gear 12 of the reducer 11. Heating can be achieved through the oil inlet 15 and the oil outlet 16. The internal vacuum degree of the drying mixer 6 is controlled at -60 to -90 kPa. Under the state of heat transfer oil heating at the oil inlet 15, the dryer controls the material heating temperature to 140-190°C, separating the material into two forms: gas phase and solid phase. The solid phase can be discharged through the residue discharge port 17 and the spare port 23 set at the bottom of the drying mixer 6.

[0033] The vapor phase enters the circulating water condenser 18 through the vacuum dehumidification port 7. After heat exchange with the circulating water in the condenser, it is liquefied and enters the buffer tank 20. The liquefied NMP is extracted from the bottom of the buffer tank 20 and loaded into barrels. The non-condensable vapor is extracted by the vacuum pump 22 and enters the tail gas treatment system. After the material is dried, the solid carbon powder is discharged from the lower outlet and loaded into barrels.

[0034] This utility model loads and unloads defective products from a ton container 1 into a slurry tank 3, which is then transported to a dryer via a pneumatic diaphragm pump. The drying mixer 6, heated by heat transfer oil, separates the material into gaseous and solid phases. The gaseous phase enters the circulating water condenser 18 through the vacuum dehumidification port 7, where it liquefies after heat exchange with the circulating water and enters the NMP collection tank. The liquefied NMP is then extracted from the bottom and stored in drums. Non-condensable vapors are extracted by the vacuum pump 22 and enter the exhaust gas treatment system. After the material is dried, the solid carbon powder is discharged from the lower outlet of the buffer tank 20 and stored in drums. This slurry waste liquid NMP recovery system has a simple structure, low processing cost, and can achieve high-quality recovery.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A slurry waste liquid recovery NMP system, characterized in that, include: The slurry tank (3) unit, the stirring vacuum unit, and the condensation unit; The slurry tank (3) unit includes a slurry tank (3), one end of which is connected to a ton tank (1) via an input pump (2), and the other end of which is connected to a stirring vacuum unit via an output pump (4); The stirring vacuum unit includes a support frame (5), and a drying mixer (6) is provided on the top of the support frame (5). The top of the drying mixer (6) is provided with a vacuum dehumidification port (7) and a slurry waste liquid inlet (8). The slurry waste liquid inlet (8) is connected to the output end of the output pump (4). The drying mixer (6) is also provided with a vacuum gauge (9) and a thermometer (10) on the side near the inlet. A reducer (11) is provided at any end of the drying mixer (6). The transmission gear (12) of the reducer (11) passes through the drying mixer (6). The end of the transmission gear (12) away from the reducer (11) is provided with a bearing seat (13) and a rotary joint (14) in sequence. The rotary joint (14) is connected to an oil outlet (16) and an oil inlet (15) respectively. A residue discharge port (17) is connected to any side of the bottom of the drying mixer (6). The condensation unit includes a circulating water condenser (18), the top of which is connected to the slurry waste liquid inlet (8) via a suction hose (19). The circulating water condenser (18) has a heat exchange inlet and a heat exchange outlet on its periphery. The bottom of the circulating water condenser (18) is connected to one side of the top of the buffer tank (20), and the other side of the top of the buffer tank (20) is connected to a vacuum pump (22) via a vacuum tube (21).

2. The slurry waste liquid recovery NMP system as described in claim 1, characterized in that, The input pump (2) and output pump (4) include: All use pneumatic diaphragm pumps.

3. The slurry waste liquid recovery NMP system as described in claim 2, characterized in that, The drying mixer (6) includes: Its vacuum level is -60 to -90 kPa.

4. The slurry waste liquid recovery NMP system as described in claim 1, characterized in that, The drying mixer (6) includes: Its heating temperature is 140-190℃.

5. The slurry waste liquid recovery NMP system as described in claim 1, characterized in that, The drying mixer (6) includes a spare port (23) on the other side of its bottom away from the residue discharge port (17).

6. The slurry waste liquid recovery NMP system as described in claim 1, characterized in that, The drying mixer (6) also includes: The drying mixer (6) is equipped with lifting rings (24) at both ends near the top.

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