CN220818132U - NMP recovery device for recovering low-temperature heat and generating waste heat - Google Patents
NMP recovery device for recovering low-temperature heat and generating waste heat Download PDFInfo
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- CN220818132U CN220818132U CN202322614424.4U CN202322614424U CN220818132U CN 220818132 U CN220818132 U CN 220818132U CN 202322614424 U CN202322614424 U CN 202322614424U CN 220818132 U CN220818132 U CN 220818132U
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- 238000011084 recovery Methods 0.000 title claims abstract description 24
- 239000002918 waste heat Substances 0.000 title claims abstract description 16
- 238000000576 coating method Methods 0.000 claims abstract description 32
- 239000011248 coating agent Substances 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims description 38
- 239000002912 waste gas Substances 0.000 claims description 31
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims 4
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 abstract description 54
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000001816 cooling Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 239000003880 polar aprotic solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses an NMP (N-methyl pyrrolidone) recovery device for recovering low-temperature heat and generating waste heat, which comprises an air-air heat exchanger, a first heat pump circulation assembly, a second heat pump circulation assembly, an atmospheric air inlet pipeline, a coater exhaust pipeline and a coater return air pipeline; the air heat exchanger and the first heat pump circulating assembly form a first circulating loop, the exhaust pipeline of the coating machine is communicated with the air heat exchanger, and the air inlet pipeline of the atmosphere is communicated with the air heat exchanger; the air-air heat exchanger and the second heat pump circulation assembly form a second circulation loop, and the second heat pump circulation assembly is communicated with a return air pipeline of the coating machine; in the technical scheme, through the matched use of the air inlet pipeline of the atmosphere and the exhaust pipeline of the coating machine, the arrangement of the surface air cooler is omitted, and the interface arranged on the second high-temperature condenser is used for external equipment, so that surplus heat energy can be output for other purposes, the recovery of energy is realized, and the running energy consumption of the system is minimized.
Description
Technical Field
The utility model relates to the technical field of waste gas treatment, in particular to an NMP (N-methyl pyrrolidone) recovery device for recovering low-temperature heat and generating waste heat.
Background
NMP (N-methyl pyrrolidone) is a strong polar aprotic solvent with excellent performance, has a series of advantages of stable chemical property, high temperature resistance, strong dissolution capacity, low volatility, high safety, low toxicity and the like, and is widely used in lithium ion battery production, in the lithium ion battery production and coating process, NMP is discharged from coating equipment in the form of waste gas, if the waste gas is directly discharged into the environment without recovery treatment, on the one hand, environmental pollution can be caused, on the other hand, great resource waste can be caused, in the prior art, the NMP waste gas is cooled, condensed and recovered by adopting a mode of combining a cooling tower and a low-temperature refrigerating unit, the cooling tower and the low-temperature refrigerating unit are usually required to be matched with chilled water to achieve the purpose of condensing and cooling the NMP waste gas, however, the field working condition is relatively complex, the supply of the chilled water cannot be guaranteed in real time, and the equipment is influenced when relevant conditions such as insufficient chilled water supply occur. Therefore, the method of condensing and cooling NMP waste gas by using chilled water in the prior art has the technical defect of being easily influenced by the condition of chilled water supply.
Disclosure of utility model
The utility model aims to provide an NMP (N-methyl pyrrolidone) recovery device for recovering low-temperature heat and generating waste heat, and aims to solve the technical defect that a mode of condensing and cooling NMP waste gas by adopting chilled water in the prior art is easy to influence by chilled water supply.
To achieve the purpose, the utility model adopts the following technical scheme:
The utility model discloses an NMP (N-methyl pyrrolidone) recovery device for recovering low-temperature heat and generating waste heat, which comprises an air-air heat exchanger, a first heat pump circulation assembly, a second heat pump circulation assembly, an atmospheric air inlet pipeline, a coater exhaust pipeline and a coater return air pipeline; the air heat exchanger and the first heat pump circulating assembly form a first circulating loop, the exhaust pipeline of the coating machine is communicated with the air heat exchanger, and the air inlet pipeline of the atmosphere is communicated with the air heat exchanger; the air-air heat exchanger and the second heat pump circulating assembly form a second circulating loop, the second heat pump circulating assembly is communicated with a return air pipeline of the coating machine, and the second heat pump circulating assembly is communicated with the air-air heat exchanger through the air inlet pipeline; the first heat pump circulation assembly comprises a low-temperature evaporator, a low-temperature compressor and a second heat exchanger which are connected through pipelines, and is used for reducing the temperature of NMP waste gas; the second heat pump circulation assembly comprises a first high-temperature condenser, a high-temperature compressor, a second high-temperature condenser and a second heat exchanger which are connected through pipelines, and the second heat pump circulation assembly is used for heating circulating return air.
The air-air heat exchanger is provided with a first inlet, a second inlet, a first outlet and a second outlet, wherein the first inlet of the air-air heat exchanger is respectively communicated with the air exhaust pipeline of the coating machine and the air inlet pipeline of the atmosphere, the second inlet of the air-air heat exchanger is communicated with the low-temperature evaporator, the first outlet of the air-air heat exchanger is communicated with the low-temperature evaporator, and the second outlet of the air-air heat exchanger is sequentially communicated with the first high-temperature condenser and the air return pipeline of the coating machine.
The low-temperature evaporator is provided with a third inlet, a fourth inlet, a third outlet and a fourth outlet, the third inlet of the low-temperature evaporator is connected with the gas-gas heat exchanger, the fourth inlet of the low-temperature evaporator is connected with the second heat exchanger, the third outlet of the low-temperature evaporator is connected with the low-temperature compressor, and the fourth outlet of the low-temperature evaporator is respectively communicated with a tail gas discharge pipeline and the second inlet of the gas-gas heat exchanger.
Preferably, an interface is arranged on the second high-temperature condenser for external equipment.
Preferably, the first heat pump cycle further includes a low temperature expansion valve disposed between the second heat exchanger and the low temperature evaporator.
Preferably, the second heat pump cycle assembly further includes a high temperature expansion valve disposed between the second heat exchanger and the second high temperature condenser.
Preferably, a first fan is arranged between the atmospheric air inlet pipeline and the air-air heat exchanger.
Preferably, a second fan is arranged on the exhaust pipeline of the coating machine.
Preferably, a third fan is arranged between the low-temperature evaporator and the gas-gas heat exchanger.
The technical scheme discloses an NMP recovery device for recovering low-temperature heat and generating waste heat, which comprises a gas-gas heat exchanger, a first heat pump circulation assembly, a second heat pump circulation assembly, an atmospheric air inlet pipeline, a coater exhaust pipeline and a coater return pipeline; the air heat exchanger and the first heat pump circulating assembly form a first circulating loop, the exhaust pipeline of the coating machine is communicated with the air heat exchanger, and the air inlet pipeline of the atmosphere is communicated with the air heat exchanger; the air-air heat exchanger and the second heat pump circulating assembly form a second circulating loop, the second heat pump circulating assembly is communicated with a return air pipeline of the coating machine, and the second heat pump circulating assembly is communicated with the air-air heat exchanger through the air inlet pipeline; the first heat pump circulation assembly comprises a low-temperature evaporator, a low-temperature compressor and a second heat exchanger which are sequentially connected through pipelines, and is used for reducing the temperature of NMP waste gas; the second heat pump cycle assembly comprises a first high-temperature condenser, a high-temperature compressor, a second heat exchanger and a second high-temperature condenser which are sequentially connected through pipelines, and the second heat pump cycle assembly is used for heating circulating return air. According to the technical scheme, through the matched use of the air inlet pipeline of the atmosphere and the air exhaust pipeline of the coating machine, the arrangement of the surface cooler is omitted, cooling water is not required to be introduced, and the technical defect that NMP waste gas treatment in the prior art is easily influenced by the supply condition of chilled water is overcome.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram showing a connection structure of an NMP recovery apparatus according to an embodiment of the present utility model.
Wherein: 1. a gas-gas heat exchanger; 2. a first heat pump cycle assembly; 21. a low temperature evaporator; 22. a low temperature expansion valve; 23. a low temperature compressor; 3. a second heat pump cycle assembly; 31. a first high temperature condenser; 33. a high temperature compressor; 4. a second heat exchanger; 32. a second high temperature condenser; 4. a second heat exchanger; 100. an exhaust pipeline of the coating machine; 200 the atmospheric air inlet pipeline; 300. the coating machine return air pipeline; 400. a tail gas discharge pipeline;
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
The utility model discloses an NMP recovery device for recovering low-temperature heat and generating waste heat, which is shown in figure 1 and comprises an air-air heat exchanger 1, a first heat pump circulation assembly 2, a second heat pump circulation assembly 3, an atmospheric air inlet pipeline 200, a coater exhaust pipeline 100 and a coater return air pipeline 300; the air heat exchanger 1 and the first heat pump circulation assembly 2 form a first circulation loop, the coater exhaust pipeline 100 is communicated with the air heat exchanger 1, the atmospheric air inlet pipeline 200 is communicated with the air heat exchanger 1, NMP waste gas discharged by the coater exhaust pipeline 100 is cooled by the air heat exchanger 1, part of NMP is condensed into liquid state, recovery of NMP is realized, when the system is started, the outlet temperature of the low-temperature evaporator 21 is preset to be 15 ℃, the atmospheric air inlet pipeline 200 is opened to enable air to enter the device, at the moment, the coater exhaust pipeline 100 is closed, after air circulation is stable, the coater exhaust pipeline 100 is opened again, the atmospheric air inlet pipeline 200 is closed, NMP waste gas enters the system, at the moment, air circulation and the temperature in the system are stable, the outlet temperature of the low-temperature evaporator 21 is 15 ℃, condensation recovery of NMP gas can be realized, no additional surface cooler is required, and the technical defect that NMP waste gas treatment is easily influenced by chilled water supply condition is overcome; the air-air heat exchanger 1 and the second heat pump circulation assembly 3 form a second circulation loop, the second heat pump circulation assembly 3 is communicated with the air return pipeline 300 of the coating machine, the second heat pump circulation assembly 3 is communicated with the air-air heat exchanger 1 through the air inlet pipeline 200, a part of circulation return air is heated by the second heat pump circulation assembly 3 and returns to the air return pipeline 300 of the coating machine and returns to the coating machine, and the other part of circulation return air can flow back to the air inlet pipeline 200 and enter the air-air heat exchanger 1 again according to the air quantity requirement so as to ensure the air quantity requirement of the system.
The first heat pump cycle assembly 2 comprises a low-temperature evaporator 21, a low-temperature compressor 23 and a second heat exchanger 4 which are sequentially connected through pipelines, wherein the first heat pump cycle assembly 2 is used for reducing the temperature of NMP waste gas, and a low-temperature refrigerant in the low-temperature evaporator 21 is used for evaporating and absorbing heat so as to reduce the temperature and condense the NMP waste gas; during operation, NMP waste gas cooled by the gas-gas heat exchanger 1 flows through the low-temperature evaporator 21 for cooling again, part of NMP is condensed into liquid state, the NMP concentration in the NMP waste gas is further reduced, and recovery of NMP can be realized; after the refrigerant in the low-temperature evaporator 21 absorbs heat, the refrigerant sequentially acts in the first heat pump cycle assembly 2 through the low-temperature evaporator 21, the low-temperature compressor 23 and the second heat exchanger 4 to form low-temperature low-pressure liquid, and the low-temperature low-pressure liquid returns to the low-temperature evaporator 21 again, so that the supply of the low-temperature refrigerant in the low-temperature evaporator 21 can be ensured, and the NMP waste gas is cooled, condensed and recovered.
The second heat pump circulation assembly 3 includes a first high-temperature condenser 31, a high-temperature compressor 33, a second heat exchanger 4, and a second high-temperature condenser 32, which are sequentially connected through pipes, the second heat pump circulation assembly 3 is used for heating the circulation return air, the first high-temperature condenser 31 is used for reheating the circulation return air, the circulation return air is heated by the first high-temperature condenser 31 and then returns to the return air pipeline of the coating machine, the high-temperature refrigerant in the first high-temperature condenser 31 forms high-temperature high-pressure liquid in the second heat pump circulation assembly 3 through the second high-temperature condenser 32, the second heat exchanger 4 and the high-temperature compressor 32 and returns to the first high-temperature condenser 31 to act on the circulation return air, so that the temperature of the circulation return air is increased, the circulation return air returns to the return air pipeline 300 of the coating machine after reaching a preset temperature, an interface is arranged on the second high-temperature condenser 32 for external equipment, in the process, the heat in the second high-temperature condenser 32 can be used for external heat supply, the heat recovery of the second high-temperature condenser 32 can be used for outputting surplus heat energy, and the heat consumption can be reduced.
The first inlet of the gas-gas heat exchanger 1 is respectively communicated with the coater exhaust pipeline 100 and the atmospheric air inlet pipeline 200, and during operation, NMP waste gas sequentially flows through the gas-gas heat exchanger 1 and the low-temperature evaporator 21 to be cooled and condensed, so that NMP is recovered; the second inlet of the gas-gas heat exchanger 1 is communicated with the low-temperature evaporator 21, the first outlet of the gas-gas heat exchanger 1 is communicated with the low-temperature evaporator 21, the second outlet of the gas-gas heat exchanger 1 is sequentially communicated with the first high-temperature condenser 31 and the coating machine return air pipeline 300, and circulating return air discharged by the low-temperature evaporator 21 enters the first high-temperature condenser 31 for reheating after being heated by the gas-gas heat exchanger 1, then enters the coating machine return air pipeline 300 and returns to the coating machine again, so as to meet the air quantity and temperature requirements in the coating machine.
The low-temperature evaporator 21 is provided with a third inlet, a fourth inlet, a third outlet and a fourth outlet, the third inlet of the low-temperature evaporator 21 is connected with the gas-gas heat exchanger 1, the fourth inlet of the low-temperature evaporator 21 is connected with the second heat exchanger 4, the third outlet of the low-temperature evaporator 21 is connected with the low-temperature compressor 23, and the fourth outlet of the low-temperature evaporator 21 is respectively communicated with a tail gas discharge pipeline 400 and the second inlet of the gas-gas heat exchanger 1; the gas flowing out of the low temperature evaporator 21, wherein 95% is returned to the gas-gas heat exchanger 1 in the form of circulating return air for heating and flows into the first high temperature condenser 31 for treatment, and the remaining 5% is discharged through the exhaust gas discharge pipe 400.
Specifically, the first heat pump cycle 2 further includes a low-temperature expansion valve 22, the low-temperature expansion valve 22 is disposed between the second heat exchanger 4 and the low-temperature evaporator 21, and the medium-high-pressure liquid refrigerant is throttled by the low-temperature expansion valve 22 to be a low-temperature low-pressure liquid refrigerant and flows back to the low-temperature evaporator 21 to act.
Specifically, the second heat pump cycle 3 further includes a high-temperature expansion valve 33, the high-temperature expansion valve 34 is disposed between the second heat exchanger 4 and the second high-temperature condenser 32, and the liquid flowing out from the first high-temperature condenser 31 acts through the high-temperature expansion valve 33 and enters the second heat exchanger 4 to be circulated.
A first fan 51 is disposed between the air inlet pipe 200 and the air-air heat exchanger 1, and is used for injecting air into the system when the system is started.
Wherein, the exhaust pipeline 100 of the coater is provided with a second fan 52 to ensure that the NMP waste gas exhausted by the coater continuously enters the gas-gas heat exchanger 1 for acting.
Wherein a third fan 53 is disposed between the low-temperature evaporator 21 and the gas-gas heat exchanger 1, and in particular, a third fan 53 is disposed between the fourth outlet of the low-temperature evaporator 21 and the second inlet of the gas-gas heat exchanger 1, so that the circulating return air discharged from the low-temperature evaporator 21 returns to the gas-gas heat exchanger 1 and is reheated.
In a specific embodiment, when the system is started, the temperature of the first outlet of the gas-gas heat exchanger 1 is preset to be 42 ℃, the temperature of the fourth outlet of the low-temperature evaporator 21 is preset to be 15 ℃, the atmospheric air inlet pipeline 200 is opened to enable air to enter the system, at the moment, the coater air exhaust pipeline 100 is closed, after the air circulation is stable and the temperature in the system is constant, the coater air exhaust pipeline 100 is opened, the atmospheric air inlet pipeline 200 is closed to enable NMP waste gas to enter the system, NMP waste gas discharged by the coater air exhaust pipeline 100 at 110 ℃ enters the gas-gas heat exchanger 1 to be cooled and condensed for the first time, NMP waste gas is cooled to 42 ℃ by the gas-gas heat exchanger 1, part of NMP waste gas is condensed to liquid to be recovered, then NMP waste gas at 42 ℃ enters the low-temperature evaporator 21 to be cooled to 15 ℃ for the second time, and in the process, the first heat pump circulation component 2 circulates refrigerant to ensure that the low-temperature refrigerant is always present in the low-temperature evaporator 21 to cool the NMP waste gas; during the gradual cooling process, NMP from the NMP off-gas is condensed into a liquid and separated from the gas, effecting recovery of NMP.
The gas discharged from the low-temperature evaporator 21 is divided into two parts, one part (about 5%) is discharged as waste gas through a tail gas discharge pipeline 400, the other part (about 95%) is heated to 92 ℃ by a circulating return air reflow air heat exchanger 1, and then enters a first high-temperature condenser 31 to be heated to 120 ℃ again, in the process, the second heat pump circulating assembly 3 circularly heats the high-temperature refrigerant to meet the use requirement that the first high-temperature condenser 31 always has the high-temperature refrigerant to heat the circulating return air, and the circulating return air enters a coater return air pipeline 300 and returns to the coater again to meet the use requirement of air quantity and temperature in the coater; the second high-temperature condenser 32 is further provided with an interface to connect with an external device, and in this process, heat generated by the second high-temperature condenser 32 can be used for supplying heat to the outside, so as to output surplus heat energy for other purposes, and realize energy recovery.
The NMP recovery device for recovering low-temperature heat and generating waste heat comprises a gas-gas heat exchanger, a first heat pump circulation assembly, a second heat pump circulation assembly, an atmospheric air inlet pipeline, a coater exhaust pipeline and a coater return pipeline; the air heat exchanger and the first heat pump circulating assembly form a first circulating loop, the exhaust pipeline of the coating machine is communicated with the air heat exchanger, and the air inlet pipeline of the atmosphere is communicated with the air heat exchanger; the air-air heat exchanger and the second heat pump circulating assembly form a second circulating loop, the second heat pump circulating assembly is communicated with a return air pipeline of the coating machine, and the second heat pump circulating assembly is communicated with the air-air heat exchanger through the air inlet pipeline; the first heat pump circulation assembly comprises a low-temperature evaporator, a low-temperature compressor and a second heat exchanger which are sequentially connected through pipelines, and is used for reducing the temperature of NMP waste gas; the second heat pump cycle assembly comprises a first high-temperature condenser, a high-temperature compressor, a second heat exchanger and a second high-temperature condenser which are sequentially connected through pipelines, and the second heat pump cycle assembly is used for heating circulating return air.
In the technical scheme, when the system is opened, the air inlet pipeline is firstly opened, the air exhaust pipeline of the coating machine is closed, after the air circulation is stable and the internal temperature of the system is constant, the air exhaust pipeline of the coating machine is opened, the air inlet pipeline of the air circulation is closed, NMP waste gas enters the system, the NMP waste gas is subjected to multistage cooling by the air-air heat exchanger and the low-temperature evaporator, the condensation recovery of NMP can be realized, the setting of the surface cooler is omitted, the circulating return pipeline is arranged, the air after the NMP recovery is heated by the air-air heat exchanger and the first high-temperature condenser and returns to the coating machine again, the exhaust energy recovery is realized, the first heat pump circulating assembly and the second heat pump circulating assembly share the second heat exchanger, the interface is arranged on the second high-temperature condenser for external equipment, the heat generated by the second circulating assembly can be used for supplying heat to the outside, the surplus heat energy is output, the energy is recovered, the operation energy consumption of the system is enabled to be minimum, and the economic benefit of the device is greatly improved.
The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from consideration of this specification without undue burden.
Claims (9)
1. The NMP recovery device for recovering low-temperature heat and generating waste heat is characterized by comprising a gas-gas heat exchanger, a first heat pump circulation assembly, a second heat pump circulation assembly, an atmospheric air inlet pipeline, a coater exhaust pipeline and a coater return air pipeline;
The air heat exchanger and the first heat pump circulating assembly form a first circulating loop, the exhaust pipeline of the coating machine is communicated with the air heat exchanger, and the air inlet pipeline of the atmosphere is communicated with the air heat exchanger;
The air-air heat exchanger and the second heat pump circulating assembly form a second circulating loop, the second heat pump circulating assembly is communicated with a return air pipeline of the coating machine, and the second heat pump circulating assembly is communicated with the air-air heat exchanger through the air inlet pipeline;
The first heat pump circulation assembly comprises a low-temperature evaporator, a low-temperature compressor and a second heat exchanger which are sequentially connected through pipelines, and is used for reducing the temperature of NMP waste gas;
The second heat pump cycle assembly comprises a first high-temperature condenser, a high-temperature compressor, a second heat exchanger and a second high-temperature condenser which are sequentially connected through pipelines, and the second heat pump cycle assembly is used for heating circulating return air.
2. The NMP recovery unit of claim 1 wherein said air-to-air heat exchanger has a first inlet, a second inlet, a first outlet, and a second outlet, said first inlet of said air-to-air heat exchanger being in communication with said coater exhaust line and said atmospheric air intake line, respectively, said second inlet of said air-to-air heat exchanger being in communication with said low temperature evaporator, said first outlet of said air-to-air heat exchanger being in communication with said low temperature evaporator, said second outlet of said air-to-air heat exchanger being in communication with said first high temperature condenser and said coater return line, respectively.
3. The NMP recovering apparatus for recovering heat at a low temperature and generating residual heat according to claim 1, wherein said low temperature evaporator has a third inlet, a fourth inlet, a third outlet, and a fourth outlet, said third inlet of said low temperature evaporator is connected to said gas-to-gas heat exchanger, said fourth inlet of said low temperature evaporator is connected to said second heat exchanger, said third outlet of said low temperature evaporator is connected to said low temperature compressor, and said fourth outlet of said low temperature evaporator is connected to said tail gas discharge line and said second inlet of said gas-to-gas heat exchanger, respectively.
4. The NMP recycling device for recycling low temperature heat and generating waste heat according to claim 1, wherein an interface is further arranged on the second high temperature condenser for external equipment.
5. The NMP recovery unit that recovers low temperature heat and generates waste heat according to claim 1, wherein said first heat pump cycle further includes a low temperature expansion valve, said low temperature expansion valve being disposed between said second heat exchanger and said low temperature evaporator.
6. The NMP recovering device for recovering heat at a low temperature and generating waste heat according to claim 1, wherein a high temperature expansion valve is provided on said second heat pump cycle, said high temperature expansion valve being provided between said second heat exchanger and said second high temperature condenser.
7. The NMP recovering device for recovering heat at low temperature and generating waste heat as defined in claim 1, wherein a first fan is provided between said air intake line and said air heat exchanger.
8. The NMP recycling device for recycling heat at low temperature and generating waste heat according to claim 1, wherein a second fan is arranged on an exhaust pipeline of the coating machine.
9. The NMP recovering apparatus for recovering heat at a low temperature and generating waste heat as defined in claim 1, wherein a third fan is provided between said low temperature evaporator and said gas-to-gas heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322614424.4U CN220818132U (en) | 2023-09-25 | 2023-09-25 | NMP recovery device for recovering low-temperature heat and generating waste heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322614424.4U CN220818132U (en) | 2023-09-25 | 2023-09-25 | NMP recovery device for recovering low-temperature heat and generating waste heat |
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| Publication Number | Publication Date |
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| CN220818132U true CN220818132U (en) | 2024-04-19 |
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| CN202322614424.4U Active CN220818132U (en) | 2023-09-25 | 2023-09-25 | NMP recovery device for recovering low-temperature heat and generating waste heat |
Country Status (1)
| Country | Link |
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| CN (1) | CN220818132U (en) |
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2023
- 2023-09-25 CN CN202322614424.4U patent/CN220818132U/en active Active
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