CN111544920A - NMP recovery system and lithium battery coating system - Google Patents

NMP recovery system and lithium battery coating system Download PDF

Info

Publication number
CN111544920A
CN111544920A CN202010424427.XA CN202010424427A CN111544920A CN 111544920 A CN111544920 A CN 111544920A CN 202010424427 A CN202010424427 A CN 202010424427A CN 111544920 A CN111544920 A CN 111544920A
Authority
CN
China
Prior art keywords
air
nmp
outlet
pipe
fan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010424427.XA
Other languages
Chinese (zh)
Inventor
郭少辉
蒋永忠
吴承翰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongguan Ousailai Electromechanical Technology Co ltd
Original Assignee
Dongguan Ousailai Electromechanical Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dongguan Ousailai Electromechanical Technology Co ltd filed Critical Dongguan Ousailai Electromechanical Technology Co ltd
Priority to CN202010424427.XA priority Critical patent/CN111544920A/en
Publication of CN111544920A publication Critical patent/CN111544920A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • 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
    • B01D5/0093—Removing and treatment of non condensable gases
    • 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
    • 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
    • B05D3/0413—Heating with air
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0404—Methods of deposition of the material by coating on electrode collectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
    • B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
    • B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrochemistry (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention discloses an NMP recovery system and a lithium battery coating system, which comprise a coating machine drying oven, an NMP adsorption system and a plurality of circulation recovery systems, wherein the coating machine drying oven comprises a plurality of exhaust fans and a plurality of air return fans, each circulation recovery system comprises a heat exchanger and a condensation recovery device, an exhaust outlet is connected with a high-temperature medium inlet of the heat exchanger through an exhaust pipe, and a high-temperature medium outlet of the heat exchanger is connected with a first inlet of the condensation recovery device through a condensing pipe; an air inlet of the NMP adsorption system is respectively connected with a first outlet of each condensation recovery device through an NMP air pipe; and a second outlet of the condensation recovery device is connected with a low-temperature medium inlet of the heat exchanger through a first air return pipe, and a low-temperature medium outlet of the heat exchanger is connected with an air return inlet through a second air return pipe. The technical scheme of the invention not only can be controllably adjusted to meet the recovery requirements of various circulating air volumes (especially meet the ultra-large circulating air volume), but also can effectively reduce heat loss.

Description

NMP recovery system and lithium battery coating system
Technical Field
The invention relates to the technical field of lithium battery manufacturing, in particular to an NMP (N-methyl pyrrolidone) recovery system and a lithium battery coating system.
Background
In recent years, with the vigorous popularization of new energy policy, the lithium battery industry shows the well-spraying growth, and as a key device in the lithium battery manufacturing industry, the lithium battery coating machine has the same requirements as the film. The lithium battery coating machine mainly comprises a coating part and an oven part, wherein the oven part needs to consume a large amount of heat energy due to heating air; the coating part is used for coating prepared pasty insulating slurry dissolved by NMP as a solvent on an electrode base material (a copper foil or an aluminum box) according to requirements, then a heater of an oven part is used for heating ambient temperature air to 120 ℃, the hot air is used for drying the slurry solvent NMP coated on the electrode base material, the remaining solid organic polymer forms a firm high insulating layer on the electrode base material and is used for manufacturing a lithium battery electrode, and waste gas containing gaseous NMP is subjected to recovery treatment and then is subjected to organized discharge.
NMP is widely used as an irreplaceable organic solvent in the lithium battery manufacturing industry and other industries. NMP, chemical name: n-methyl pyrrolidone is also called 1-methyl-2 pyrrolidone, N-methyl-2 pyrrolidone. NMP is colorless transparent oily liquid with slight amine smell. Low volatility, good thermal stability and chemical stability, and can volatilize with water vapor, the melting point is-24 ℃, and the boiling point is 202 ℃. NMP is expensive and occupies a large cost of lithium battery electrode production, and waste gas containing NMP causes certain harm to the environment if being directly discharged, so that the method has important significance for recycling NMP and limiting discharge. At present, an NMP recovery system is usually provided with equipment such as a coater oven and an NMP adsorption system to recycle NMP, and besides expensive NMP needs to be recycled, waste gas needs to be treated to reach the emission standard and then be discharged outdoors. In addition, the air in the NMP recovery system also flows back from the return air channel and enters the coating machine drying oven again for utilization, so that the air is recycled to form the circulating air volume. However, the conventional NMP recovery system can only achieve a fixed circulation air volume (for example, the conventional NMP recovery system is limited in volume due to factors such as transportation, and thus can only achieve a maximum circulation air volume of 15 ten thousand) and the air duct in the NMP recovery system also needs to be very large in volume, so that the heat loss is also large.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an NMP recovery system and a lithium battery coating system, which can be controllably adjusted to meet the recovery requirements of various circulating air volumes and can effectively reduce heat loss.
In a first aspect of the embodiments of the present invention, there is provided an NMP recovery system, including:
the coating machine drying oven comprises a plurality of exhaust fans and a plurality of air returning fans, wherein each exhaust fan is provided with an exhaust outlet, and each air returning fan is provided with an air returning opening;
the NMP adsorption system is provided with an air inlet and an air outlet for discharging air out of the room;
the system comprises a plurality of circulating recovery systems, a plurality of heat exchangers and a condensing recovery device, wherein each circulating recovery system comprises a heat exchanger and a condensing recovery device, an air outlet is connected with a high-temperature medium inlet of the heat exchanger through an exhaust pipe, and a high-temperature medium outlet of the heat exchanger is connected with a first inlet of the condensing recovery device through a condensing pipe; an air inlet of the NMP adsorption system is respectively connected with a first outlet of each condensation recovery device through an NMP air pipe; and a second outlet of the condensation recovery device is connected with a low-temperature medium inlet of the heat exchanger through a first air return pipe, and a low-temperature medium outlet of the heat exchanger is connected with the air return port through a second air return pipe.
According to one or more technical schemes provided by the invention, the method has at least the following beneficial effects: on one hand, the number and the size of the recycling systems can be intelligently adjusted by arranging a plurality of recycling systems according to the requirements of circulating air volume of various wind levels, or the circulating air volume of each recycling system can be controlled to be the same or different, so that the recycling requirement of larger circulating air volume is realized (for example, more than 20 ten thousand of circulating air volume can be recycled in an NMP recycling system), and controllable adjustment is realized. And because the circulating air volume between each circulating recovery system is smaller, air pipes such as an exhaust pipe or a return air pipe are correspondingly arranged to be smaller, thereby effectively reducing the heat loss. On the other hand, compared with the prior art that the volume of the recycling system needs to be set to be very large to meet the recycling requirement of fixed circulating air volume, the recycling system is very inconvenient to transport and install; the NMP recovery system in the embodiment of the invention is provided with a plurality of circulating recovery systems with smaller volume, thereby being convenient for transportation and installation, reducing the occupied area and having practicability.
According to some embodiments of the invention, the NMP recovery system is provided with ten recycle recovery systems; ten exhaust fans are arranged above the coating machine drying oven, and ten air return fans are arranged below the coating machine drying oven.
According to some embodiments of the present invention, the NMP adsorption system is provided with a freezer, a rotating wheel, a regeneration fan and a treatment fan, the regeneration fan is connected with the rotating wheel, and the regeneration fan is located between the freezer and the rotating wheel; the air inlet is directed toward the freezer; the treatment fan is connected to the gas outlet through a first air pipe, and the treatment fan is further connected with the rotating wheel through a second air pipe.
According to some embodiments of the present invention, the NMP adsorption system comprises a heater and an electric heater, the wheel is provided with an adsorption zone, a regeneration zone and a cooling zone, and the regeneration fan is connected to the regeneration zone; the preheating pipe is sequentially connected with the cooling zone, the electric heater, the heater and the regeneration zone, the adsorption zone is connected with the treatment fan, and the treatment fan is connected with the cooling zone through the second air pipe.
According to some embodiments of the invention, the condensation recovery device comprises a first condensation device and a second condensation device connected in sequence, the first condensation device is provided with the first inlet, and the second condensation device is provided with the first outlet and the second outlet; a high-temperature medium outlet of the heat exchanger is connected with a first inlet of the first condensing device through the condensing pipe, and an air inlet of the NMP adsorption system is respectively connected to a first outlet of each second condensing device through the NMP air pipe; and a second outlet of the second condensing device is connected with a low-temperature medium inlet of the heat exchanger through the first air return pipe.
According to some embodiments of the invention, the recycling system further comprises a return air device, the return air device is located between the heat exchanger and the return fan, the low-temperature medium outlet of the heat exchanger is connected with the air inlet of the return air device through the second return air pipe, and the air outlet of the return air device is connected to the return air inlet through a third return air pipe.
According to some embodiments of the invention, the coater oven comprises a heating unit disposed adjacent to the air return fan, the heating unit being configured to heat the substance discharged by the air return fan.
According to some embodiments of the present invention, the NMP adsorption system further comprises an exhaust valve, the exhaust valve is connected to the air outlet, and the exhaust valve is used for exhausting the gas treated by the NMP adsorption system to the outside; and the first air return pipe and the second air return pipe are both provided with air return valves.
According to some embodiments of the invention, a high efficiency filter is further disposed on the second return air pipe, and the high efficiency filter is located between the air return fan and the heat exchanger.
In a second aspect of embodiments of the present invention, there is provided a lithium battery coating system comprising an NMP recovery system as described in the first aspect above. Since the lithium battery coating system according to the embodiment of the present invention is provided with the NMP recovery system according to the first aspect, the lithium battery coating system has the beneficial effects and functional characteristics of any one of the NMP recovery systems.
Additional aspects and/or 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
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram showing the construction of an NMP recovery system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the recycle system shown in FIG. 1;
FIG. 3 is a schematic diagram of the structure of the NMP adsorption system shown in FIG. 1;
FIG. 4 is a schematic diagram of the NMP recovery system according to another embodiment of the present invention;
FIG. 5 is a schematic structural view of an NMP recovery system according to another embodiment of the present invention.
Reference numerals:
a coater oven 100, an exhaust fan 110, a return fan 120, a heating unit 130,
The recycling system 200, the heat exchanger 210, the high-temperature medium inlet 211, the high-temperature medium outlet 212, the low-temperature medium inlet 213, the low-temperature medium outlet 214, the condensation recycling device 220, the first inlet 221, the first outlet 222, the second outlet 223, the first condensing device 230, the second condensing device 240, the air returning device 250, the air inlet 251, the air outlet 252, the air outlet,
An NMP adsorption system 300, an air inlet 301, an air outlet 302, a freezer 310, a rotating wheel 320, a regeneration zone 321, a cooling zone 322, an adsorption zone 323, a regeneration fan 330, a treatment fan 340, a heater 350 and an electric heater 360.
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 or similar reference numerals refer to the same or similar elements or elements having the same or similar function 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 is to be understood that the orientation or positional relationship referred to orientation descriptions, such as up, down, left, right, front, rear, outer, inner, longitudinal, lateral, vertical, horizontal, etc., are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. 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.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In a first aspect of the embodiments of the present invention, there is provided an NMP recovery system, including: the coater oven 100 comprises a plurality of exhaust fans 110 and a plurality of air return fans 120, wherein the exhaust fans 110 are provided with air outlets, and the air return fans 120 are provided with air return inlets; an NMP adsorption system 300 provided with an air inlet 301 and an air outlet 302 for discharging air to the outside; the recycling system 200 comprises a heat exchanger 210 and a condensation recycling device 220, an exhaust outlet is connected with a high-temperature medium inlet 211 of the heat exchanger 210 through an exhaust pipe, and a high-temperature medium outlet 212 of the heat exchanger 210 is connected with a first inlet 221 of the condensation recycling device 220 through a condensing pipe; an air inlet 301 of the NMP adsorption system 300 is respectively connected with the first outlet 222 of each condensation recovery device 220 through an NMP air pipe; the second outlet 223 of the condensation and recovery device 220 is connected with the low-temperature medium inlet 213 of the heat exchanger 210 through a first air return pipe, and the low-temperature medium outlet 214 of the heat exchanger 210 is connected with the air return opening through a second air return pipe.
The NMP recovery system of the embodiment of the present invention is provided with a plurality of circulation recovery systems 200, and referring to fig. 1, the embodiment of the present invention is provided with three circulation recovery systems 200, and three exhaust fans 110 and three return fans 120 are provided on the coater oven 100. Each exhaust fan 110 is provided with an exhaust outlet, each air return fan 120 is provided with an air return port, the exhaust fan 110 is used for discharging substances such as gas in the coater oven 100, and the air return fan 120 is used for returning backflow gas treated in the recycling system 200 into the coater oven 100, so that repeated recycling is realized, and the energy conservation and environmental protection are realized.
Specifically, the NMP recovery system of the embodiment of the invention is provided with three circulating recovery systems 200, so that three circulating recovery gases (passing through the exhaust channel and the return air channel) are formed, thereby forming a large circulating air volume, and the NMP recovery system is recycled, thereby saving energy and protecting environment.
An air exhaust channel: for example, as shown in fig. 1, the gas in coater oven 100 is exhausted from exhaust fan 110, and is sent to high-temperature medium inlet 211 of heat exchanger 210 through an exhaust duct. The gas enters the heat exchanger 210 to undergo a heat exchange treatment, and the NMP-containing exhaust gas hot air is discharged from the high-temperature medium outlet 212 after being cooled. The gas enters a first inlet 221 of the condensation and recovery device 220 through a condensation pipe, and is discharged from a first outlet 222 of the condensation and recovery device 220 after being subjected to condensation treatment. Due to the arrangement of a plurality of circulating recovery systems 200, the first outlet 222 of each condensing recovery device 220 is connected to the air inlet 301 of the NMP adsorption system 300 through an NMP air pipe. And 5 to 10 percent of the gas discharged from the first outlet 222 finally enters the gas inlet 301 of the NMP adsorption system 300, and the NMP-containing gas is recycled by the NMP adsorption system 300, so that the gas reaches the emission standard and is discharged through the gas outlet 302 of the NMP adsorption system 300, thereby realizing the emission of the gas.
An air return channel: for example, as shown in fig. 1, most (90% to 95%) of the gas treated by the recycling system 200 is returned to form a return gas, which is discharged from the second outlet 223 of the recycling apparatus 220. The return gas is delivered to the low-temperature medium inlet 213 of the heat exchanger 210 through the first return air duct, is discharged from the low-temperature medium outlet 214 of the heat exchanger 210, and finally reaches the return air inlet of the return air fan 120 through the second return air duct. The backflow gas enters the coater oven 100 again, and recycling is achieved. The NMP recovery system in the embodiment is provided with a plurality of circulating recovery systems 200, and the gases in a plurality of exhaust channels and a plurality of return air channels form a large circulating air volume together, so that the cyclic recycling of NMP is realized, and the cost is saved.
In other embodiments, the recycling system 200 may be configured to be four, five, six, etc., without limitation.
According to one or more technical schemes provided by the invention, the method has at least the following beneficial effects: on one hand, in the embodiment of the present invention, the number and size of the recycling system 200 can be intelligently adjusted according to the requirement of the circulating air volume of various air levels by setting the recycling system 200 as multiple systems, so as to meet the recycling requirement of larger circulating air volume. For example, one circulation recovery system 200 can achieve 2 ten thousand of circulation air volume, and the NMP recovery system can achieve the recovery requirement of 24 ten thousand of circulation air volume by being provided with 12 2 ten thousand circulation recovery systems 200; 10 2 ten thousand circulation recovery systems 200 are arranged, and the recovery requirement of 20 ten thousand circulation air volume can be met. Or the circulating air volume between each circulating recovery system 200 is controlled to be different, for example, the first circulating recovery system 200 can realize 5000 circulating air volume by adjusting the size, and the second circulating recovery system 200 can adjust 5 thousands of circulating air volume, so that the recovery requirements of various circulating air volumes are met, and controllable regulation is realized. By providing the plurality of circulation recovery systems 200, an ultra-large circulation air volume (for example, 30 ten thousand, 40 ten thousand, or the like) can be satisfied. And because the circulation air volume between each circulation recovery system 200 that sets up is less, so the tuber pipe such as exhaust pipe or return air pipe also sets up lessly correspondingly to effectively reduce the heat loss. Compared with the NMP recovery system in the prior art, when the air pipe is damaged, the production operation is influenced, the whole air pipe needs to be maintained and replaced, and the resource cost is wasted; each recycling system 200 in the embodiment of the invention is independent, when the exhaust pipe or the first air return pipe or the second air return pipe is damaged, the damaged air pipe can be replaced in time without influencing the operation of other normal recycling systems 200, so that the material is saved and the replacement is convenient. On the other hand, compared with the prior art that the volume of the circulation recovery system is required to be set to be very large to meet the recovery requirement of fixed circulation air volume, the circulation recovery system is very inconvenient in the transportation and installation processes and occupies a very large area; the NMP recovery system in the embodiment of the invention is provided with a plurality of circulation recovery systems 200 with smaller volume, thereby being convenient for transportation and installation, reducing the occupied area and having practicability.
According to some embodiments of the present invention, an NMP recovery system is provided with ten recycle recovery systems 200; ten exhaust fans 110 are arranged above the coater oven 100, and ten return fans 120 are arranged below the coater oven.
Referring to fig. 5, in the embodiment of the present invention, ten recycling systems 200 are provided, and each recycling system 200 is connected to a coater oven 100 and an NMP adsorption system 300, respectively, so as to achieve NMP gas emission and recycling. Specifically, the gas is exhausted to the outside after reaching the emission standard through the exhaust channel; the backflow gas enters the coating machine oven 100 again through the return air channel for recycling, and an ultra-large circulating air volume is formed through the circulation recycling gas in the ten air exhaust channels and the ten return air channels. For example, in the embodiment of the present invention, 2 ten thousand of circulating air volume can be achieved by setting each circulation recovery system 200, and the exhaust pipe, the first air return pipe, the second air return pipe, or another air pipe is correspondingly provided with a volume capable of accommodating 2 ten thousand of circulating air volume, so that compared with the prior art, heat loss can be effectively reduced. The NMP recycling system can achieve 20 ten thousand of circulating air volume by being provided with ten circulating recycling systems 200, so that the recycling requirement of ultra-large circulating air volume can be met. When the recycling requirement of the circulation air volume is reduced, part of the circulation recycling system 200 can be disassembled to realize the circulation air volume of 16 ten thousand, 14 ten thousand or 10 ten thousand, but is not limited thereto. The embodiment of the invention can realize controllable adjustment to meet the recycling requirement of various wind levels of air volume, and has practicability. In other embodiments, the number or size of the recycling system 200 may be controllably adjusted according to the recycling requirement of the circulating air volume, which is not limited to this embodiment and is not described herein again.
According to some embodiments of the present invention, the NMP adsorption system 300 is provided with a freezer 310, a rotating wheel 320, a regeneration fan 330 and a treatment fan 340, the regeneration fan 330 is connected with the rotating wheel 320, and the regeneration fan 330 is located between the freezer 310 and the rotating wheel 320; the air inlet 301 is directed toward the freezer 310; the process fan 340 is connected to the air outlet 302 by a first air duct, and the process fan 340 is also connected to the runner 320 by a second air duct.
Referring to fig. 1 and 2, 5% to 10% of the gas was introduced from the inlet 301 of the NMP adsorption system 300 through the exhaust passage. After the gas is cooled by the freezer 310, a large amount of NMP is condensed and separated out, and the NMP can be discharged into a waste liquid tank or a waste liquid tank after being condensed into liquid, so that the NMP is recovered, and the temperature of hot air of waste gas containing the NMP is reduced. Thereafter, the gas is adsorbed and treated by the wheel 320, and then flows through the treatment fan 340. On one hand, the gas reaches the discharge standard after being processed, and reaches the gas outlet 302 through the first air pipe, so as to be discharged out of the room; on the other hand, after the gas is discharged from the processing fan 340, the gas flows to the runner 320 through the second air duct, and the gas processed by the runner 320 flows to the regeneration fan 330 and is discharged through the regeneration fan 330. The NMP adsorption system 300 of the embodiment of the invention is used for recycling waste gas containing NMP, so that the discharged gas meets the emission standard and the environment is protected; the refrigerating device 310 can change NMP in the exhaust gas into liquid, and recover and reuse NMP, and is practical.
According to some embodiments of the present invention, the NMP adsorption system 300 includes a heater 350 and an electric heater 360, the wheel 320 is provided with an adsorption zone 323, a regeneration zone 321 and a cooling zone 322, and the regeneration fan 330 is connected to the regeneration zone 321; the preheating pipe is connected with the cooling area 322, the electric heater 360, the heater 350 and the regeneration area 321 in sequence, the adsorption area 323 is connected with the processing fan 340, and the processing fan 340 is also connected with the cooling area 322 through a second air pipe.
Referring to fig. 2, the rotor 320 is provided with a regeneration zone 321, a cooling zone 322 and an adsorption zone 323 from top to bottom, respectively, and in other embodiments, the regeneration zone 321, the cooling zone 322 and the adsorption zone 323 may be separated by a heat and solvent resistant sealing material. The treatment was carried out by continuous operation of a rotary wheel, and 3 kinds of gases (e.g., regeneration gas/cooling gas/treatment gas) having different air volumes were passed. NMP-containing waste gas enters from an air inlet 301 of the NMP adsorption system 300, is cooled by a freezer 310, and then is condensed and separated, and after being condensed into liquid, NMP can be discharged into a waste liquid tank or a waste liquid tank to recycle NMP, and the temperature of hot air of the NMP-containing waste gas can be reduced. At this time, the processing gas having a large air volume enters the adsorption region 323 of the rotor 320, impurities such as organic solvents in the processing gas are adsorbed and filtered by the adsorption region 323, and the adsorbed/purified processing gas is clean and meets the emission standard. Thereafter, the process gas enters the process fan 340 and passes through the first duct to the gas outlet 302, thereby being discharged to the outside.
In addition, after the process gas enters the process fan 340, the process gas will also flow to the cooling zone 322 through the second air duct. The process gas is absorbed in the cooling zone 322 and used as a cooling gas. Under the action of the regeneration fan 330, the cooling gas flows to the electric heater 360, the heater 350, and finally to the regeneration zone 321 through the preheating pipe. Since the cooling gas is heated to the desorption temperature after passing through the cooling zone 322, the electric heater 360 and the heater 350, the organic solvent in the regeneration zone 321 is evaporated and separated and mixed into the gas to become the regeneration gas. The regeneration gas is finally discharged via the regeneration fan 330. The NMP adsorption system 300 of the embodiment of the invention can continuously and circularly purify the gas to be treated and concentrate VOC (volatile organic compounds), and has practicability; through the arrangement, the cooling gas respectively passes through the cooling area 322, the electric heater 360 and the heater 350 to reach the regeneration area 321, so that the residual heat of the cooling area 322 is recycled, and the energy utilization efficiency is improved.
According to some embodiments of the present invention, the condensation recycling apparatus 220 comprises a first condensing apparatus 230 and a second condensing apparatus 240 connected in sequence, wherein the first condensing apparatus 230 is provided with a first inlet 221, and the second condensing apparatus 240 is provided with a first outlet 222 and a second outlet 223; the high-temperature medium outlet 212 of the heat exchanger 210 is connected with the first inlet 221 of the first condensing device 230 through a condensing pipe, and the air inlet 301 of the NMP adsorption system 300 is respectively connected with the first outlet 222 of each second condensing device 240 through an NMP air pipe; the second outlet 223 of the second condensing unit 240 is connected to the low-temperature medium inlet 213 of the heat exchanger 210 via a first return air duct.
Referring to fig. 3, the embodiment of the present invention is provided with a plurality of recycling systems 200, and each condensing and recycling device 220 is provided with a first condensing device 230 and a second condensing device 240 connected in sequence; and the first outlet 222 of each second condensing unit 240 is connected to the air inlet 301 of the NMP adsorption system 300 through an NMP air pipe. After being discharged through the high-temperature medium outlet 212 of the heat exchanger 210, the gas enters the first inlet 221 of the first condensing device 230 through the condensing tube, and the gas reaches the first outlet 222 of the second condensing device 240 through the first condensing device 230 and the second condensing device 240. Then, a small part of the gas (for example, 5% to 10%) reaches the gas inlet 301 of the NMP adsorption system 300, and the NMP-containing gas is recovered by the NMP adsorption system 300, so that the gas reaches the emission standard and is finally discharged through the gas outlet 302 of the NMP adsorption system 300, thereby realizing the emission of the gas.
In addition, most of the gas (for example, 90% to 95%) condensed by the first condensing unit 230 and the second condensing unit 240 is discharged as a reflux gas from the second outlet 223 of the second condensing unit 240. The return gas is delivered to the low-temperature medium inlet 213 of the heat exchanger 210 through the first return air duct, is discharged from the low-temperature medium outlet 214 of the heat exchanger 210, and finally reaches the return air inlet of the return air fan 120 through the second return air duct. The backflow gas enters the coater oven 100 again, and recycling is achieved. The condensation treatment of the gas or the return gas is enhanced by arranging the first condensing device 230 and the second condensing device 240, so that the NMP is further treated conveniently, and the efficiency and the energy are high. In other embodiments, the first condensing device 230 and/or the second condensing device 240 may be a surface cooler, a cooling tower, or the like.
According to some embodiments of the present invention, the recycling system 200 further comprises a return air device 250, the return air device 250 is located between the heat exchanger 210 and the return air machine 120, the low-temperature medium outlet 214 of the heat exchanger 210 is connected with the air inlet 251 of the return air device 250 through a second return air pipe, and the air outlet 252 of the return air device 250 is connected to the return air inlet through a third return air pipe. Referring to fig. 4, the recycling system 200 in the embodiment of the present invention further includes a return air device 250, the return air device 250 is disposed between the heat exchanger 210 and the return air blower 120, and the air flow rate of the return air can be increased by disposing the return air device 250, so that the circulation rate of the whole circulation air volume is increased, and the energy utilization efficiency is improved.
According to some embodiments of the present invention, the coater oven 100 includes a heating unit 130, the heating unit 130 is disposed adjacent to the air return fan 120, and the heating unit 130 is used for heating the substance discharged from the air return fan 120. Referring to fig. 1, the coater oven 100 according to the embodiment of the present invention is further provided with a heating unit 130, and the heating unit 130 is configured to heat substances such as gas exhausted from the air returning unit 120, so that the heated gas reenters the coater oven 100 for recycling. The heating unit 130 can accelerate the heating rate of the gas, so that the large heat loss of the coating machine oven 100 is prevented when a large amount of low-temperature gas reenters the coating machine oven 100, and the efficient operation of the equipment is ensured.
According to some embodiments of the present invention, the NMP adsorption system 300 further comprises an exhaust valve, the exhaust valve is connected to the air outlet 302, and the exhaust valve is used for exhausting the gas treated by the NMP adsorption system 300 to the outside; and the first air return pipe and the second air return pipe are both provided with air return valves. According to the embodiment of the invention, the exhaust valve is arranged at the air outlet 302, and the return valves are arranged on the first return air pipe and the second return air pipe, so that the air flow speed of the air can be increased, the recovery rate of the circulating air volume in the whole NMP recovery system is increased, and the system has practicability.
According to some embodiments of the present invention, a high efficiency filter is further disposed on the second return air pipe, and the high efficiency filter is located between the air return fan 120 and the heat exchanger 210. In the embodiment of the invention, the second air return pipe is also provided with the high-efficiency filter, and impurities in the return air are filtered by the high-efficiency filter, so that the impurities are prevented from entering the coating machine oven 100 and affecting the service life of the coating machine oven 100.
In a second aspect of embodiments of the present invention, there is provided a lithium battery coating system comprising an NMP recovery system as described above in the first aspect.
According to the lithium battery coating system provided by the embodiment of the invention, the NMP recovery system is adopted, so that the floor area is reduced, and the structure of the NMP recovery system can be controllably adjusted, so that the recovery requirements of various circulating air volumes are met. Through setting up a plurality of circulation recovery system 200, can also effectively reduce the heat loss. Specifically, in other embodiments, since the lithium battery coating system is provided with the NMP recovery system in any one of the above embodiments, the lithium battery coating system has the beneficial effects and functional characteristics brought by the NMP recovery system in any one of the above embodiments.
Other configurations and operations of the lithium battery coating system according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
An NMP recovery system according to an embodiment of the present invention is described in detail below as a specific example with reference to fig. 4. It is to be understood that the following description is only exemplary, and not a specific limitation of the invention.
As shown in fig. 4, the NMP recovery system according to the embodiment of the present invention includes three recycling systems 200, and the volumes of the recycling systems 200 may be different or the same, for example, the first recycling system 200 may have a circulation air volume of 1 ten thousand, the second recycling system 200 may have a circulation air volume of 5 ten thousand, and the third recycling system 200 may have a circulation air volume of 10 ten thousand. According to the recycling requirement of the circulating air volume, each circulating recycling system 200 can be controllably adjusted. Three exhaust fans 110 and three return fans 120 are correspondingly arranged on the coater oven 100, and each exhaust fan 110 and each return fan 120 correspond to three circulation recovery systems 200 respectively. The three circulating recovery systems 200 are respectively connected with the NMP adsorption system 300 and the coater oven 100, so that three exhaust channels and three return air channels are formed, and three circulating recovery gases form a large circulating air volume and are recycled in the whole NMP recovery system.
Specifically, taking any one recycling system 200 as an example, the exhaust fan 110 on the coater oven 100 is provided with an exhaust outlet, and the exhaust outlet is connected with the high-temperature medium inlet 211 of the heat exchanger 210 in the recycling system 200 through an exhaust pipe. The high temperature medium outlet 212 of the heat exchanger 210 is connected to the first inlet 221 of the first condensing unit 230 through a condensing pipe. The first outlet 222 of the second condensing device 240 is connected to the air inlet 301 of the NMP adsorption system 300 through an NMP air pipe; the second condensing unit 240 is provided with a second outlet 223, and the second outlet 223 is connected with the low-temperature medium inlet 213 of the heat exchanger 210 through a first air return pipe. The low-temperature medium outlet 214 of the heat exchanger 210 is connected with the return air inlet of the return air fan 120 through a second return air pipe. The NMP adsorption system 300 is provided with a refrigerator 310, a rotary wheel 320, a regeneration fan 330, a treatment fan 340, a heater 350 and an electric heater 360, the rotary wheel 320 is provided with an adsorption zone 323, a regeneration zone 321 and a cooling zone 322, an air inlet 301 faces the refrigerator 310, the regeneration fan 330 is positioned between the refrigerator 310 and the rotary wheel 320, and the regeneration fan 330 is connected with the regeneration zone 321. The preheating pipe is sequentially connected with the cooling area 322, the electric heater 360, the heater 350 and the regeneration area 321, the adsorption area 323 is connected with the processing fan 340, the processing fan 340 is connected to the air outlet 302 through a first air pipe, and the processing fan 340 is also connected with the cooling area 322 through a second air pipe.
The NMP recovery system provided by the embodiment of the invention specifically works in the following process:
an air exhaust channel: the gas in the coater oven 100 is exhausted from the exhaust fan 110, and is conveyed to the high-temperature medium inlet 211 of the heat exchanger 210 through the exhaust duct. The gas enters the heat exchanger 210 to undergo a heat exchange treatment, and the NMP-containing exhaust gas hot air is discharged from the high-temperature medium outlet 212 after being cooled. The gas enters the first inlet 221 of the first condensing device 230 through the condensing pipe, is condensed by the first condensing device 230 and the second condensing device 240, and is discharged from the first outlet 222 of the second condensing device 240. Due to the arrangement of the three recycling systems 200, the first outlet 222 of each second condensing unit 240 is connected to the air inlet 301 of the NMP adsorption system 300 through the NMP air pipe. A portion of the gas (e.g., 5% to 10%) passes through the NMP ductwork to the air inlet 301 of the NMP adsorption system 300. The freezer 310 cools the gas, at this time, a large amount of NMP is condensed and separated, and after the NMP is condensed into liquid, the liquid can be discharged into a waste liquid tank or a waste liquid pool to recycle the NMP. Then, the processing gas enters an adsorption region 323 in the runner 320, and impurities such as organic solvents in the processing gas are adsorbed and filtered through the adsorption region 323 to reach the emission standard. In one aspect, a portion of the process gas enters the process fan 340 and passes through the first ductwork to the outlet 302 for discharge to the exterior; on the other hand, after entering the process fan 340, another part of the process gas will flow to the cooling zone 322 through the second air pipe under the action of the regeneration fan 330. The cooling zone 322 absorbs the process gas to become a cooling gas. The cooling gas passes through the preheating pipe, passes through the electric heater 360 and the heater 350 in sequence, and finally flows to the regeneration zone 321. The organic solvent in the regeneration zone 321 is evaporated by the heated cooling gas to be desorbed and mixed as a regeneration gas. The regeneration gas is finally discharged via the regeneration fan 330.
An air return channel: most (for example, 90% to 95%) of the gas treated by the condensing and recycling unit 220 is refluxed to form a reflux gas. That is, the return gas is condensed by the first condensing unit 230 and the second condensing unit 240, and then discharged from the second outlet 223 of the second condensing unit 240, and the return gas is delivered to the low-temperature medium inlet 213 of the heat exchanger 210 through the first return pipe, and then discharged from the low-temperature medium outlet 214 of the heat exchanger 210. The return air passes through the second return air duct to the air inlet 251 of the return air device 250, and is discharged from the air outlet 252 of the return air device 250. The return air flows to coater oven 100 through the third return air duct by the return air blower 120. The heating unit 130 heats the gas delivered by the air returning machine 120, so that the heated backflow gas enters the coater oven 100 again, thereby realizing recycling.
According to the NMP recovery system of the embodiment of the invention, at least some effects as follows can be achieved by the arrangement: by arranging the plurality of circulating recovery systems 200, the recovery requirements of various circulating air quantities (especially the ultra-large circulating air quantity) can be met, so that the controllable regulation is realized, and the heat loss can be effectively reduced; compared with the prior art, the embodiment of the invention is very convenient to transport and install, and the occupied area is reduced.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the 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 (10)

1. An NMP recovery system, comprising:
the coating machine drying oven comprises a plurality of exhaust fans and a plurality of air returning fans, wherein each exhaust fan is provided with an exhaust outlet, and each air returning fan is provided with an air returning opening;
the NMP adsorption system is provided with an air inlet and an air outlet for discharging air out of the room;
the system comprises a plurality of circulating recovery systems, a plurality of heat exchangers and a condensing recovery device, wherein each circulating recovery system comprises a heat exchanger and a condensing recovery device, an air outlet is connected with a high-temperature medium inlet of the heat exchanger through an exhaust pipe, and a high-temperature medium outlet of the heat exchanger is connected with a first inlet of the condensing recovery device through a condensing pipe; an air inlet of the NMP adsorption system is respectively connected with a first outlet of each condensation recovery device through an NMP air pipe; and a second outlet of the condensation recovery device is connected with a low-temperature medium inlet of the heat exchanger through a first air return pipe, and a low-temperature medium outlet of the heat exchanger is connected with the air return port through a second air return pipe.
2. An NMP recovery system according to claim 1, characterized in that: the NMP recovery system is provided with ten circulating recovery systems; ten exhaust fans are arranged above the coating machine drying oven, and ten air return fans are arranged below the coating machine drying oven.
3. An NMP recovery system according to claim 1, characterized in that: the NMP adsorption system is provided with a freezer, a rotating wheel, a regeneration fan and a treatment fan, wherein the regeneration fan is connected with the rotating wheel, and the regeneration fan is positioned between the freezer and the rotating wheel; the air inlet is directed toward the freezer; the treatment fan is connected to the gas outlet through a first air pipe, and the treatment fan is further connected with the rotating wheel through a second air pipe.
4. An NMP recovery system according to claim 3, wherein: the NMP adsorption system comprises a heater and an electric heater, the rotating wheel is provided with an adsorption area, a regeneration area and a cooling area, and the regeneration fan is connected with the regeneration area; the preheating pipe is sequentially connected with the cooling zone, the electric heater, the heater and the regeneration zone, the adsorption zone is connected with the treatment fan, and the treatment fan is connected with the cooling zone through the second air pipe.
5. An NMP recovery system according to claim 1, characterized in that: the condensation recovery device comprises a first condensation device and a second condensation device which are connected in sequence, the first condensation device is provided with the first inlet, and the second condensation device is provided with the first outlet and the second outlet; a high-temperature medium outlet of the heat exchanger is connected with a first inlet of the first condensing device through the condensing pipe, and an air inlet of the NMP adsorption system is respectively connected to a first outlet of each second condensing device through the NMP air pipe; and a second outlet of the second condensing device is connected with a low-temperature medium inlet of the heat exchanger through the first air return pipe.
6. An NMP recovery system according to claim 1, characterized in that: the circulating recovery system further comprises an air return device, the air return device is located between the heat exchanger and the air return fan, a low-temperature medium outlet of the heat exchanger is connected with an air inlet of the air return device through the second air return pipe, and an air outlet of the air return device is connected to the air return inlet through a third air return pipe.
7. An NMP recovery system according to claim 1, characterized in that: the coating machine drying oven comprises a heating unit, the heating unit is adjacent to the air return fan, and the heating unit is used for heating substances discharged by the air return fan.
8. An NMP recovery system according to claim 1, characterized in that: the NMP adsorption system further comprises an exhaust valve, the exhaust valve is connected with the air outlet, and the exhaust valve is used for exhausting the gas treated by the NMP adsorption system out of a room; and the first air return pipe and the second air return pipe are both provided with air return valves.
9. An NMP recovery system according to claim 1, characterized in that: and a high-efficiency filter is further arranged on the second air return pipe and is positioned between the air return fan and the heat exchanger.
10. A lithium battery coating system, characterized in that: an NMP recovery system including an NMP recovery system as claimed in any one of claims 1 to 9.
CN202010424427.XA 2020-05-19 2020-05-19 NMP recovery system and lithium battery coating system Pending CN111544920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010424427.XA CN111544920A (en) 2020-05-19 2020-05-19 NMP recovery system and lithium battery coating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010424427.XA CN111544920A (en) 2020-05-19 2020-05-19 NMP recovery system and lithium battery coating system

Publications (1)

Publication Number Publication Date
CN111544920A true CN111544920A (en) 2020-08-18

Family

ID=71998723

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010424427.XA Pending CN111544920A (en) 2020-05-19 2020-05-19 NMP recovery system and lithium battery coating system

Country Status (1)

Country Link
CN (1) CN111544920A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113842746A (en) * 2021-09-17 2021-12-28 苏州兆和通风设备制造有限公司 Organic gas recovery modular assembly and coating machine waste gas treatment system
CN114798369A (en) * 2022-04-21 2022-07-29 苏州兆和环能科技有限公司 Coating machine drying oven and coating machine waste gas recovery system
CN114917611A (en) * 2022-05-23 2022-08-19 广州黑马科技有限公司 Lithium ion battery production NMP recovery unit
DE102022000536A1 (en) 2021-12-22 2023-06-22 Dürr Systems Ag Method and device for treating process air
DE102022104813A1 (en) 2022-03-01 2023-09-07 Dürr Systems Ag PROCESS AIR TREATMENT ARRANGEMENT AND METHOD FOR TREATMENT OF PROCESS AIR

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103987441A (en) * 2011-12-12 2014-08-13 日本瑞环株式会社 Gas-liquid contact device, distillation device, and heat exchange device
CN105797420A (en) * 2016-03-23 2016-07-27 东莞塔菲尔新能源科技有限公司 NMP gas recovery system and technology thereof
CN108489144A (en) * 2018-01-29 2018-09-04 同济大学 A kind of drying system using overlapping multiple heat pump

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103987441A (en) * 2011-12-12 2014-08-13 日本瑞环株式会社 Gas-liquid contact device, distillation device, and heat exchange device
CN105797420A (en) * 2016-03-23 2016-07-27 东莞塔菲尔新能源科技有限公司 NMP gas recovery system and technology thereof
CN108489144A (en) * 2018-01-29 2018-09-04 同济大学 A kind of drying system using overlapping multiple heat pump

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113842746A (en) * 2021-09-17 2021-12-28 苏州兆和通风设备制造有限公司 Organic gas recovery modular assembly and coating machine waste gas treatment system
WO2023040831A1 (en) * 2021-09-17 2023-03-23 苏州兆和环能科技有限公司 Organic gas recovery modular assembly and coating machine waste gas treatment system
CN113842746B (en) * 2021-09-17 2024-08-20 苏州兆和环能科技有限公司 Organic gas recovery modularization subassembly and coating machine exhaust treatment system
DE102022000536A1 (en) 2021-12-22 2023-06-22 Dürr Systems Ag Method and device for treating process air
DE102022104813A1 (en) 2022-03-01 2023-09-07 Dürr Systems Ag PROCESS AIR TREATMENT ARRANGEMENT AND METHOD FOR TREATMENT OF PROCESS AIR
CN114798369A (en) * 2022-04-21 2022-07-29 苏州兆和环能科技有限公司 Coating machine drying oven and coating machine waste gas recovery system
CN114798369B (en) * 2022-04-21 2024-06-04 苏州兆和环能科技有限公司 Coating machine oven and coating machine waste gas recovery system
CN114917611A (en) * 2022-05-23 2022-08-19 广州黑马科技有限公司 Lithium ion battery production NMP recovery unit

Similar Documents

Publication Publication Date Title
CN111544920A (en) NMP recovery system and lithium battery coating system
US9958205B2 (en) Drying apparatus
CN214914691U (en) Carbon dioxide capture system
CN100502994C (en) Method for recovering organic waste gas during printing or coating production
CN102701560A (en) Sludge dehumidify and drying machine
CN113842746B (en) Organic gas recovery modularization subassembly and coating machine exhaust treatment system
WO2023202332A1 (en) Drying oven for coating machine, and waste gas recovery system for coating machine
CN107400076A (en) A kind of NMP in working procedure of coating lithium ion cell recovery essence steams purifying plant
KR20150113367A (en) NMP recovery purification system
CN113797705B (en) Gas concentration device, organic solvent recovery system and organic gas recovery concentration method
CN212282942U (en) NMP recovery system and lithium battery coating system
CN217367211U (en) Lithium ion battery production NMP recovery unit
CN216320933U (en) Exhaust gas treatment unit and coating machine exhaust gas treatment system using same
CN214347674U (en) NMP recovery system and lithium battery coating system
CN201659077U (en) Environment-friendly drying oven cover
CN108895713A (en) A kind of lithium battery pole piece coating machine drying system using heat pump recuperation of heat
CN111473614B (en) Environment-friendly heat pump dryer
CN219209457U (en) NMP recovery system and lithium battery coating system based on same
CN101700518A (en) Environment-friendly drying method and environment-friendly drying oven cover
CN206018671U (en) A kind of exhaust-gas treatment structure for being applied to incinerator
CN218553600U (en) Organic gas recovery processing device
CN200961971Y (en) A solution regeneration device with the hot water as the driving energy
EP4417919A1 (en) Electrode manufacturing facility and electrode manufacturing method
CN216977582U (en) VOC exhaust-gas treatment recovery system
CN217442309U (en) Condensation suspension tower

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination