CN213878192U - Lithium battery diaphragm NMP retrieves system of recycling - Google Patents
Lithium battery diaphragm NMP retrieves system of recycling Download PDFInfo
- Publication number
- CN213878192U CN213878192U CN202022511773.XU CN202022511773U CN213878192U CN 213878192 U CN213878192 U CN 213878192U CN 202022511773 U CN202022511773 U CN 202022511773U CN 213878192 U CN213878192 U CN 213878192U
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- CN
- China
- Prior art keywords
- nmp
- reboiler
- lithium battery
- recycling
- tower
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 18
- 238000004064 recycling Methods 0.000 title claims abstract description 17
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 20
- HCSCWJCZRCSQFA-UHFFFAOYSA-N 1-methylpyrrolidin-2-one;hydrate Chemical compound O.CN1CCCC1=O HCSCWJCZRCSQFA-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 2
- 238000010992 reflux Methods 0.000 claims description 2
- 230000029219 regulation of pH Effects 0.000 claims description 2
- 238000000576 coating method Methods 0.000 abstract description 9
- 239000011248 coating agent Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 abstract description 4
- 239000012528 membrane Substances 0.000 abstract 1
- 238000010979 pH adjustment Methods 0.000 abstract 1
- 239000003960 organic solvent Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
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- Secondary Cells (AREA)
Abstract
The utility model discloses a lithium battery diaphragm NMP retrieves system of recycling, including workshop basin, NMP filter equipment, neutralization tank, NMP pre-heater, NMP knockout tower, vacuum system, NMP top of the tower condenser, steam heating system, NMP reboiler, NMP cauldron go out the pump, NMP cooler, PH adjustment kettle, the solution in the workshop basin is carried to the neutralization tank through NMP filter equipment, the neutralization tank is connected to NMP knockout tower through NMP pre-heater, NMP knockout tower top export is connected with NMP top of the tower condenser; the NMP water separation tower is connected with an NMP reboiler, the NMP reboiler is connected with a steam heating system, the heating system provides heat energy, and then the NMP reboiler is connected to an NMP cooler through an NMP kettle pump for recycling the solution. The system can effectively improve the recovery rate and purity of NMP and reduce the production cost of the coating membrane.
Description
Technical Field
The utility model belongs to lithium cell coating diaphragm production field, in particular to lithium cell diaphragm NMP retrieves system of recycling.
Background
The coated separator is used for lithium battery production, and compared with other types of separators, the coated separator has the advantages of improving the heat yield, improving the tensile strength and the liquid absorption rate, and simultaneously reducing the porosity and the air permeability. The high tensile strength, low thermal shrinkage and high liquid absorption of the coated separator contribute to increase the energy density of the battery, which may make the battery safer at high temperatures.
The coating process can be classified into aqueous coating and oily coating according to the difference of the slurry, and the oily coating uses an organic solvent such as NMP and the like. In the process, the affinity of the solvent with the binder and the diaphragm is good, the uniformity and the adhesiveness of the product are better than those of a water-based coating diaphragm, but the organic solvent is high in price, large in pollution and high in cost, so that the organic solvent needs to be recycled.
Disclosure of Invention
The utility model discloses an aim at overcoming organic solvent recovery and recycle problem, provide a lithium cell diaphragm NMP recovery and recycle system, this system can retrieve the NMP solvent that is arranged in the coating diaphragm production process to it is high to retrieve the NMP purity, thereby reduces coating diaphragm manufacturing cost, promotes market competition.
The utility model adopts the technical proposal that: a lithium battery diaphragm NMP recycling system comprises a workshop water tank, an NMP filtering device, a neutralization tank, an NMP preheater, an NMP water dividing tower, a vacuum system, an NMP overhead condenser, a steam heating system, an NMP reboiler, an NMP kettle pump, an NMP cooler and a PH adjusting kettle, wherein the workshop water tank is connected to the neutralization tank through the NMP filtering device, the neutralization tank is connected to the NMP water dividing tower through the NMP preheater, the neutralization tank is connected with the PH adjusting kettle for neutralization, an outlet at the top of the NMP water dividing tower is connected with the NMP overhead condenser, the lower end of the NMP water dividing tower is connected with the top of the NMP reboiler, the NMP water dividing tower and the NMP overhead condenser are both carried out in the vacuum system, the NMP reboiler is connected with the steam heating system to provide heat energy, a high-purity NMP solution obtained in the NMP reboiler through the steam heating system is pumped to the NMP cooler for cooling, the NMP cooler outlet is connected with a workshop through a pipeline, and the high-purity NMP solution is sent to the workshop to be reused.
Further, the PH range of the NMP solution in the neutralization tank is 7-9, and the PH range of the alkali solution in the PH regulation kettle is 7-11.
Further, the temperature range of the NMP preheater is 40-80 ℃.
Further, the vacuum degree setting range of the vacuum system is-20 to-90 kPa.
Further, the NMP reboiler is a horizontal siphon reboiler.
Furthermore, a reflux circulation pipeline is arranged between the NMP water dividing tower and the NMP reboiler.
Further, the temperature setting range of the steam heating system is 100-200 ℃.
The utility model has the advantages that: the utility model discloses lithium cell diaphragm NMP retrieves system of recycling filters the impurity in the NMP solution through NMP filter equipment, through in the neutralization jar with handle and the NMP pre-heater preheats the back, carry to the NMP knockout drum under the vacuum negative pressure state, carry out quick uniform separation through steam heating system in the NMP reboiler, obtain the higher NMP solution of purity behind the NMP cooler, realize retrieving and recycling. The system can effectively improve the recovery rate and purity of NMP and reduce the production cost of the coated diaphragm.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
For the purpose of more clearly explaining the present application using the novel embodiments, the technical solutions and the advantages thereof, the present invention provides the following drawings for explanation:
FIG. 1 is a schematic structural diagram of a lithium battery diaphragm NMP recovery system.
Detailed Description
In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 1, a system for recycling NMP from a lithium battery separator includes: the system comprises a workshop water tank 1, an NMP filtering device 2, a neutralization tank 3, an NMP preheater 4, an NMP water separation tower 5, a vacuum system 6, an NMP overhead condenser 7, a steam heating system 8, an NMP reboiler 9, an NMP kettle outlet pump 10, an NMP cooler 11 and a pH adjusting kettle 12.
The NMP filtering device 2 is connected in series between a workshop water tank 1 and a neutralization tank 3, and the neutralization tank 3 is simultaneously connected with a pH adjusting kettle 12 and used for adjusting the pH value of an NMP solution; the NMP solution after neutralization treatment is preheated by an NMP preheater 4 and then enters the NMP water knockout tower 5 from the upper end thereof, the lower end of the NMP water knockout tower 5 is connected with the top of an NMP reboiler 9, and separation is realized through reduced pressure distillation.
And the vacuum system 6 is connected with the NMP water diversion tower 5 and is used for ensuring that the interior of the tower is in a vacuum negative pressure state. Be equipped with the pipeline that is used for transmitting hot steam between steam heating system 8 and the NMP reboiler, NMP reboiler 9 is inside evenly to be covered with the pipeline to guarantee can quick even heating.
The water vapor separated from the NMP water knockout tower 5 is condensed by an NMP overhead condenser 7 and then is sent to a workshop through a pipeline for recycling; the high-purity NMP solution obtained in the NMP reboiler 9 through the steam heating system 8 is sent to an NMP cooler 11 through an NMP kettle discharge pump 10 to be cooled, and then is sent to a workshop through a pipeline to be reused.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present invention in any way, and all technical solutions obtained by using equivalent substitution modes and the like fall within the scope of the present invention.
The utility model discloses the part that does not relate to all is the same with prior art or can adopt prior art to realize.
Claims (7)
1. The utility model provides a lithium cell diaphragm NMP retrieves system of recycling which characterized in that: comprises a workshop water tank (1), an NMP filtering device (2), a neutralization tank (3), an NMP preheater (4), an NMP water dividing tower (5), a vacuum system (6), an NMP overhead condenser (7), a steam heating system (8), an NMP reboiler (9), an NMP kettle pump-out (10), an NMP cooler (11) and a PH adjusting kettle (12), wherein the workshop water tank (1) is connected to the neutralization tank (3) through the NMP filtering device (2), the neutralization tank (3) is connected to the NMP water dividing tower (5) through the NMP preheater (4), the neutralization tank (3) is connected with the PH adjusting kettle (12) for neutralization, the top outlet of the NMP water dividing tower (5) is connected with the NMP overhead condenser (7), the lower end of the NMP water dividing tower (5) is connected with the top of the NMP reboiler (9), and the NMP water dividing tower (5) and the NMP overhead condenser (7) are all carried out in the vacuum system, the NMP reboiler (9) is connected with the steam heating system (8) to provide heat energy, the high-purity NMP solution obtained in the NMP reboiler (9) through the steam heating system (8) is sent to the NMP cooler (11) through the NMP kettle discharge pump (10) to be cooled, the outlet of the NMP cooler (11) is connected with a workshop through a pipeline, and the high-purity NMP solution is sent to the workshop to be reused.
2. The lithium battery separator NMP recycling system of claim 1, characterized in that: the PH range of the NMP solution in the neutralization tank (3) is 7-9, and the PH range of the alkali solution in the PH regulation kettle (12) is 7-11.
3. The lithium battery separator NMP recycling system of claim 1, characterized in that: the temperature range of the NMP preheater (4) is 40-80 ℃.
4. The lithium battery separator NMP recycling system of claim 1, characterized in that: the vacuum degree setting range of the vacuum system (6) is-20 to-90 kPa.
5. The lithium battery separator NMP recycling system of claim 1, characterized in that: the NMP reboiler (9) is a horizontal siphon reboiler.
6. The lithium battery separator NMP recycling system according to claim 1 or 5, characterized in that: and a reflux circulation pipeline is arranged between the NMP water diversion tower (5) and the NMP reboiler (9).
7. The lithium battery separator NMP recycling system of claim 1, characterized in that: the temperature setting range of the steam heating system (8) is 100-200 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022511773.XU CN213878192U (en) | 2020-11-03 | 2020-11-03 | Lithium battery diaphragm NMP retrieves system of recycling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022511773.XU CN213878192U (en) | 2020-11-03 | 2020-11-03 | Lithium battery diaphragm NMP retrieves system of recycling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213878192U true CN213878192U (en) | 2021-08-03 |
Family
ID=77052291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022511773.XU Active CN213878192U (en) | 2020-11-03 | 2020-11-03 | Lithium battery diaphragm NMP retrieves system of recycling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213878192U (en) |
-
2020
- 2020-11-03 CN CN202022511773.XU patent/CN213878192U/en active Active
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