CN114917611A - Lithium ion battery production NMP recovery unit - Google Patents
Lithium ion battery production NMP recovery unit Download PDFInfo
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- CN114917611A CN114917611A CN202210560670.3A CN202210560670A CN114917611A CN 114917611 A CN114917611 A CN 114917611A CN 202210560670 A CN202210560670 A CN 202210560670A CN 114917611 A CN114917611 A CN 114917611A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0003—Condensation of vapours; Recovering volatile solvents by condensation by using heat-exchange surfaces for indirect contact between gases or vapours and the cooling medium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0033—Other features
- B01D5/0036—Multiple-effect condensation; Fractional condensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0033—Other features
- B01D5/0054—General arrangements, e.g. flow sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
- B01D5/009—Collecting, removing and/or treatment of the condensate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
The invention discloses a device for recovering NMP produced by a lithium ion battery, which comprises a return air box, a condensing unit and a purifying unit; the air return box is arranged in the coating machine drying oven; the condensation unit comprises a waste heat recoverer, a circulating water heat exchanger and a chilled water heat exchanger, and the inlet end of the waste heat recoverer is communicated with the outlet end of the coating machine drying oven; a heat pipe heat exchanger is arranged between the circulating water heat exchanger and the chilled water heat exchanger, and an outlet of the chilled water heat exchanger is sequentially connected with the heat pipe heat exchanger, the waste heat recoverer and the coating machine drying oven through a first pipeline; the input of purification unit passes through the export of second pipeline with the refrigerated water heat exchanger, and purification unit's output communicates to the return air case through the third pipeline, has reduced the consumption of refrigerated water, has improved the temperature of sending back the coating machine air, has reduced the energy resource consumption of coating machine, and all waste gases after purification unit handles send back the return air case, have realized the zero release of coating process, have also reduced the consumption of coating machine head space and coating machine afterbody space drying air simultaneously.
Description
Technical Field
The invention belongs to the technical field of lithium ion battery production, and particularly relates to a device for recovering NMP in lithium ion battery production.
Background
The preparation method of the positive electrode sheet for the lithium battery adopts a coating process, and after N-methyl pyrrolidone (NMP) and a binder, a conductive agent and a positive electrode material are mixed to prepare slurry, the slurry is coated on an aluminum foil and then is baked in a drying tunnel. When baking, NMP is discharged out of the oven along with hot air, the exhaust temperature generated in the coating process is about 110 ℃, and the NMP content is 5g/m 3 Left and right exhaust gases.
The physical properties of NMP show that NMP condenses when the exhaust temperature is lowered, and table 1 shows the NMP concentration in air at different temperatures.
Table 1 NMP saturated steam table
| NMP temperature (. degree. C.) | 40 | 35 | 30 | 25 | 20 | 15 | 10 |
| Saturation concentration of NMP (g/m) 3 ) | 4.98 | 3.61 | 2.57 | 1.82 | 1.26 | 0.864 | 0.583 |
It can be seen from Table 1 that NMP in the exhaust air of the coating machine can be recovered by cooling the exhaust air of the coating machine, and it can be seen from Table 1 that NMP concentration in the exhaust air is as high as 0.583g/m even if the air exhausted from the coating machine is cooled to 10 deg.C 3 The method can not meet the discharge standard GB30484-2013 of battery industrial pollution, and the NMP recovered by a cooling method can not meet the requirement of environmental protection.
In addition, the cooling of the NMP-containing air requires the removal of heat from the air, and the more heat removed, the less heat that can be recovered from the air to the coater. When coating exhaust cooling is realized, exhaust heat is reduced by cooling medium as much as possible, and circulating cooling water or chilled water is used as a key for realizing heat recovery maximization.
Finally, the head space and the tail space of the coating machine for lithium battery production are both in a dry environment, for example, the temperature is controlled to be 23 +/-2 ℃, and the relative humidity is about 10%. In order to prevent NMP-containing gas in the coating machine from overflowing to the head space and the tail space of the coating machine, the head and the tail of a drying oven of the coating machine are in a negative pressure state, namely the prior NMP recovery system has exhaust, namely the prior NMP recovery device has the action of sacrificing dry air.
Disclosure of Invention
The invention mainly aims to provide a recovery device for producing NMP by a lithium ion battery, which reduces the consumption of chilled water, improves the temperature of air returned to a coating machine, and reduces the energy consumption of the coating machine.
According to the first aspect of the invention, the device for recovering the NMP produced by the lithium ion battery comprises a return air box, a condensing unit and a purifying unit;
the air return box is arranged in a coating machine drying oven;
the condensation unit comprises a waste heat recoverer, a circulating water heat exchanger and a chilled water heat exchanger which are sequentially arranged, and the inlet end of the waste heat recoverer is communicated with the outlet end of the coating machine drying oven; a heat pipe heat exchanger is arranged between the circulating water heat exchanger and the chilled water heat exchanger, and an outlet of the chilled water heat exchanger is sequentially connected with the heat pipe heat exchanger, the waste heat recoverer and the coating machine drying oven through a first pipeline;
the input end of the purification unit is communicated with the outlet of the chilled water heat exchanger through a second pipeline, and the output end of the purification unit is communicated to the air return box through a third pipeline.
In a particular embodiment of the invention, the heat pipe heat exchanger comprises at least two sets of horizontally disposed heat pipes.
In a specific embodiment of the invention, the circulating water heat exchangers form a first-stage condensation group, the chilled water heat exchangers form a second-stage condensation group, the number of the first-stage condensation groups in the condensation unit is more than 1, the number of the second-stage condensation groups in the condensation unit is more than 1, the first-stage condensation group and the second-stage condensation group are connected in series, and a heat pipe heat exchanger is arranged between the adjacent first-stage condensation group and the second-stage condensation group.
In a particular embodiment of the invention, the first stage condensation groups and the second stage condensation groups are arranged alternately in series.
In a specific embodiment of the invention, the purification unit comprises an air cooler, a molecular sieve concentration rotating wheel, a rotating wheel regeneration heater and a rotating wheel regeneration fan, the molecular sieve concentration rotating wheel is provided with a purification area, a cooling area and a regeneration area, an outlet of the air cooler is connected with a first branch and a second branch in parallel, the first branch is communicated to a return air box after passing through the purification area, and the second branch is communicated to an inlet of the air cooler through the cooling area, the rotating wheel regeneration heater, the regeneration area and the rotating wheel regeneration fan.
In a specific embodiment of the invention, the air return boxes comprise a head air return box and a tail air return box, the head air return box and the tail air return box are respectively arranged at the head part and the tail part of the coating machine oven, and the outlet of the purification area is communicated to the head air return box or/and the tail air return box.
In a specific embodiment of the invention, the waste heat recoverer adopts a heat pipe heat exchanger.
In a specific embodiment of the invention, 80% -90% of gas in the outlet of the chilled water heat exchanger flows through the heat pipe heat exchanger and the waste heat recoverer and flows back to the coating machine drying oven, and 10% -20% of gas in the outlet of the chilled water heat exchanger enters the purification unit.
One of the above technical solutions of the present invention has at least one of the following advantages or beneficial effects: compared with the traditional condensation recovery, the invention adds the heat pipe heat exchanger between the circulating water cooling heat exchanger and the chilled water cooling heat exchanger, thereby reducing the consumption of chilled water, improving the temperature of air sent back to the coating machine and reducing the energy consumption of the coating machine. The head and the tail of the coating machine are respectively provided with an air return box, all waste gas treated by the purification unit is sent back to the air return box, zero emission in the coating process is realized, and the consumption of dry air in the head space and the tail space of the coating machine is reduced. The invention also utilizes the heat pipe heat exchanger as the recovered waste heat, thereby facilitating the collection of the NMP condensate.
Drawings
The invention is further described below with reference to the drawings and examples;
FIG. 1 is a schematic structural diagram of one embodiment of the present invention;
fig. 2 is a schematic diagram of the operation of a heat pipe heat exchanger according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and greater than, less than, more than, etc. are understood as excluding the essential numbers, and greater than, less than, etc. are understood as including the essential numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, and may be, for example, a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other elements or indirectly connected through one or more other elements or in an interactive relationship between two elements.
The following disclosure provides many different embodiments, or examples, for implementing different aspects of the invention.
Referring to fig. 1 to 2, the recycling device for NMP produced by lithium ion batteries comprises a return air box, a condensing unit 100 and a purifying unit 200; the air return box is arranged in the coating machine drying oven 10; the condensation unit 100 comprises a waste heat recoverer 11, a circulating water heat exchanger 12 and a chilled water heat exchanger 14 which are sequentially arranged, and the inlet end of the waste heat recoverer 11 is communicated with the outlet end of a coating machine drying oven 10; a heat pipe heat exchanger 13 is arranged between the circulating water heat exchanger 12 and the chilled water heat exchanger 14, and an outlet of the chilled water heat exchanger 14 is sequentially connected with the heat pipe heat exchanger 13, the waste heat recoverer 11 and the coating machine drying oven 10 through a first pipeline; the input end of the purification unit 200 is connected with the outlet of the chilled water heat exchanger 14 through a second pipeline, and the output end of the purification unit 200 is communicated to the return air box through a third pipeline.
Specifically, the waste gas discharged from the coater oven 10 passes through the waste heat recovery device 11, is cooled by the circulating cooling water heat exchanger, is cooled by the heat pipe heat exchanger 13, and is finally cooled by the chilled water heat exchanger 14, about 90% of the waste gas cooled by the chilled water is returned to the coater oven 10, about 10% of the waste gas is purified by the purification unit 200 and is then returned to the bellows, and the part of gas replaces the dry air supplemented from the drying room, so that the consumption of the dry air in the space near the coater is reduced.
Wherein, the circulating water heat exchanger 12 utilizes the cooling water produced by the water cooling tower to cool the NMP in the air; the heat pipe heat exchanger 13 cools the exhaust gas of the coating machine by using the cold air cooled by the water lower than the normal temperature, so that on one hand, the temperature of the cold air is increased, on the other hand, the air cooled by the water lower than the normal temperature is cooled, and the consumption of the cooling water lower than the normal temperature is reduced; the chilled water heat exchanger 14 cools NMP in the air with chilled water lower than normal temperature; the waste gas discharged by the coating machine and the air which is sent back to the coating machine and contains less NMP carry out heat exchange in a waste heat recoverer 11, so that the temperature of the air which returns to the coating machine is raised, the energy consumption of the coating machine is reduced,
in one embodiment of the invention, the heat pipe heat exchanger comprises at least two groups of horizontally arranged heat pipes. When the heat pipe exchanger 13 is used for heat exchange, NMP condensation phenomenon exists when the high-temperature waste gas containing NMP is cooled, and the horizontally arranged heat pipes are convenient for NMP to flow downwards and accumulate under the action of gravity, so that NMP collection is facilitated.
In one embodiment of the present invention, the heat pipe heat exchanger 13 includes a wick 132 and a heat pipe housing 131 sequentially arranged from inside to outside, the wick 132 has a heat exchange working medium vapor 133 therein, and a liquid working medium 134 is disposed between the wick 132 and the heat pipe housing 131.
As shown in fig. 2, the working medium at the evaporation section in the heat pipe is heated and then boiled or evaporated to absorb the heat of the external heat source, thereby generating latent heat of vaporization, the liquid is changed into vapor, the generated vapor flows to the condensation section under the action of a certain pressure difference in the pipe, the vapor condenses into liquid when meeting the cold wall surface and the external cold source, and simultaneously releases latent heat of vaporization and is transmitted to the external cold source through the pipe wall, and the condensate flows back to the evaporation section for re-evaporation under the action of the liquid absorption core 132. The heat transfer and exchange of the external cold and hot media are realized by the reciprocating.
In an embodiment of the invention, the circulating water heat exchangers 12 form a first-stage condensation group, the chilled water heat exchangers 14 form a second-stage condensation group, the number of the first-stage condensation groups in the condensation units is greater than 1, the number of the second-stage condensation groups in the condensation units is greater than 1, the first-stage condensation groups and the second-stage condensation groups are connected in series, a heat pipe heat exchanger 13 and a purification unit 200 are arranged between the adjacent first-stage condensation groups and the adjacent second-stage condensation groups, and the purification unit 200 is used for purifying waste gas of at least two condensation units 100, so that the collection amount of NMP condensate is increased, the amount of gas flowing back to a return air box is increased, and the loss of dry gas near a coating machine is reduced. Preferably, the first-stage condensation groups and the second-stage condensation groups are alternately arranged in series.
In one embodiment of the present invention, the purification unit 200 comprises an air cooler 20, a molecular sieve concentration wheel 21, a wheel regeneration heater 22 and a wheel regeneration fan 23, the molecular sieve concentration wheel 21 has a purification zone 211, a cooling zone 212 and a regeneration zone 213, an outlet of the air cooler 20 is connected in parallel with a first branch and a second branch, the first branch is communicated to a return air box through the purification zone 211, and the NMP content in the exhaust gas treated by the exhaust gas purification unit 200 is less than 20mg/m 3 In order to reduce the usage amount of the space near the coater, part of the gas passes through the cooling zone 212, the rotary wheel regeneration heater 22, the regeneration zone 213 and the rotary wheel regeneration fan 23 in the second branch, is communicated to the inlet of the air cooler 20, and returns to the air cooler 20 after being heated and regenerated.
In one embodiment of the invention, the air returning boxes comprise a head air returning box 16 and a tail air returning box 15, the head air returning box 16 and the tail air returning box 15 are respectively arranged at the head part and the tail part of the coating machine drying oven, and the outlet of the purifying area 211 is communicated to the head air returning box 16 or/and the tail air returning box 15, so that the consumption of dry air in the head space and the tail space of the coating machine is reduced.
In an embodiment of the present invention, the waste heat recoverer 11 is a heat pipe heat exchanger. The heat pipe heat exchanger comprises at least two groups of horizontally arranged heat pipes. When the heat pipe heat exchanger carries out heat exchange, NMP condensation phenomenon exists when NMP-containing high-temperature waste gas is cooled, and the horizontally arranged heat pipe is convenient for NMP to flow downwards and accumulate under the action of gravity, so that NMP collection is facilitated.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. The device for recovering NMP produced by the lithium ion battery is characterized by comprising an air return box, a condensing unit and a purifying unit;
the air return box is arranged in a coating machine drying oven;
the condensation unit comprises a waste heat recoverer, a circulating water heat exchanger and a chilled water heat exchanger which are sequentially arranged, and the inlet end of the waste heat recoverer is communicated with the outlet end of the coating machine drying oven; a heat pipe heat exchanger is arranged between the circulating water heat exchanger and the chilled water heat exchanger, and an outlet of the chilled water heat exchanger is sequentially connected with the heat pipe heat exchanger, the waste heat recoverer and the coating machine drying oven through a first pipeline;
the input end of the purification unit is communicated with the outlet of the chilled water heat exchanger through a second pipeline, and the output end of the purification unit is communicated to the air return box through a third pipeline.
2. The lithium ion battery production NMP recovery apparatus of claim 1, wherein the heat pipe heat exchanger comprises at least two sets of horizontally disposed heat pipes.
3. The recovery device for NMP produced by lithium ion batteries according to claim 1, wherein the circulating water heat exchangers form a first-stage condensation group, the chilled water heat exchangers form a second-stage condensation group, the number of the first-stage condensation groups in the condensation unit is greater than 1, the number of the second-stage condensation groups in the condensation unit is greater than 1, the first-stage condensation groups and the second-stage condensation groups are connected in series, and a heat pipe heat exchanger is arranged between the adjacent first-stage condensation groups and the adjacent second-stage condensation groups.
4. The lithium ion battery production NMP recovery device of claim 1, wherein the first stage condensing units and the second stage condensing units are alternately arranged in series.
5. The lithium ion battery production NMP recovery apparatus of claim 1, 3 or 4, wherein the purification unit comprises an air cooler, a molecular sieve concentration rotating wheel, a rotating wheel regeneration heater and a rotating wheel regeneration fan, the molecular sieve concentration rotating wheel has a purification zone, a cooling zone and a regeneration zone, an outlet of the air cooler is connected with a first branch and a second branch in parallel, the first branch is communicated to the air return box after passing through the purification zone, and the second branch is communicated to an inlet of the air cooler through the cooling zone, the rotating wheel regeneration heater, the regeneration zone and the rotating wheel regeneration fan.
6. The recovery device for NMP produced by the lithium ion battery according to claim 5, wherein the air return boxes comprise a head air return box and a tail air return box, the head air return box and the tail air return box are respectively arranged at the head part and the tail part of the coating machine drying oven, and the outlet of the purification area is communicated to the head air return box or/and the tail air return box.
7. The lithium ion battery production NMP recovery device of claim 1, wherein the waste heat recoverer employs a heat pipe exchanger.
8. The recovery device for NMP produced by the lithium ion battery according to claim 1, wherein 80% -90% of gas in the outlet of the chilled water heat exchanger flows through the heat pipe heat exchanger and the waste heat recoverer and returns to the coater oven, and 10% -20% of gas in the outlet of the chilled water heat exchanger enters the purification unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210560670.3A CN114917611A (en) | 2022-05-23 | 2022-05-23 | Lithium ion battery production NMP recovery unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210560670.3A CN114917611A (en) | 2022-05-23 | 2022-05-23 | Lithium ion battery production NMP recovery unit |
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| CN114917611A true CN114917611A (en) | 2022-08-19 |
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| CN202210560670.3A Pending CN114917611A (en) | 2022-05-23 | 2022-05-23 | Lithium ion battery production NMP recovery unit |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111544920A (en) * | 2020-05-19 | 2020-08-18 | 东莞欧赛莱机电科技有限公司 | NMP recovery system and lithium battery coating system |
| CN215996142U (en) * | 2021-06-10 | 2022-03-11 | 上海骋歆商务咨询中心 | A exhaust treatment system for NMP retrieves |
| CN217367211U (en) * | 2022-05-23 | 2022-09-06 | 广州黑马科技有限公司 | Lithium ion battery production NMP recovery unit |
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2022
- 2022-05-23 CN CN202210560670.3A patent/CN114917611A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111544920A (en) * | 2020-05-19 | 2020-08-18 | 东莞欧赛莱机电科技有限公司 | NMP recovery system and lithium battery coating system |
| CN215996142U (en) * | 2021-06-10 | 2022-03-11 | 上海骋歆商务咨询中心 | A exhaust treatment system for NMP retrieves |
| CN217367211U (en) * | 2022-05-23 | 2022-09-06 | 广州黑马科技有限公司 | Lithium ion battery production NMP recovery unit |
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