CN220801989U - NMP recovery device for partially recovering low-temperature heat - Google Patents
NMP recovery device for partially recovering low-temperature heat Download PDFInfo
- Publication number
- CN220801989U CN220801989U CN202322614447.5U CN202322614447U CN220801989U CN 220801989 U CN220801989 U CN 220801989U CN 202322614447 U CN202322614447 U CN 202322614447U CN 220801989 U CN220801989 U CN 220801989U
- Authority
- CN
- China
- Prior art keywords
- temperature
- heat exchanger
- low
- nmp
- heat pump
- 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.)
- Active
Links
- 238000011084 recovery Methods 0.000 title claims abstract description 33
- 239000011248 coating agent Substances 0.000 claims abstract description 38
- 238000000576 coating method Methods 0.000 claims abstract description 38
- 239000002912 waste gas Substances 0.000 claims abstract description 28
- 239000007789 gas Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 abstract description 13
- 238000009833 condensation Methods 0.000 abstract description 4
- 230000005494 condensation Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 52
- 239000007788 liquid Substances 0.000 description 13
- 239000003507 refrigerant Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003880 polar aprotic solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
The utility model discloses an NMP recovery device for partially recovering low-temperature heat, which comprises a heat exchanger, a low-temperature heat pump circulation assembly, a surface cooler and a high-temperature heat pump circulation assembly; the heat exchanger, the low-temperature heat pump circulation assembly and the surface cooler form a first circulation loop, and the heat exchanger is communicated with an exhaust pipeline of the coating machine; the heat exchanger and the high-temperature heat pump circulation assembly form a second circulation loop, and the high-temperature heat pump circulation assembly is communicated with a return air pipeline of the coating machine. In this technical scheme, carry out multistage cooling through heat exchanger, low temperature evaporator, surface cooler to NMP waste gas, can realize the condensation recovery of NMP, through setting up circulation return air pipeline, make the gas after the NMP recovery heat and get back to the coating machine again through heat exchanger, high temperature condenser in, realize exhaust energy recovery, make the operation energy consumption of system reach minimum, improved the economic benefits of this device by a wide margin.
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 partially recovering low-temperature 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. Therefore, the mode of treating NMP waste gas in the prior art has the technical defect of poor energy-saving effect.
Disclosure of utility model
The utility model aims to provide an NMP recovery device for partially recovering low-temperature heat, and aims to solve the technical defect that the mode of treating NMP waste gas in the prior art has poor energy-saving effect.
To achieve the purpose, the utility model adopts the following technical scheme:
The utility model discloses an NMP recovery device for partially recovering low-temperature heat, which comprises a heat exchanger, a low-temperature heat pump circulation assembly, a surface cooler and a high-temperature heat pump circulation assembly; the heat exchanger, the low-temperature heat pump circulation assembly and the surface cooler form a first circulation loop, and the heat exchanger is communicated with an exhaust pipeline of the coating machine; the heat exchanger and the high-temperature heat pump circulation assembly form a second circulation loop, and the high-temperature heat pump circulation assembly is communicated with a return air pipeline of the coating machine; the low-temperature 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 high-temperature heat pump circulation assembly comprises a high-temperature condenser, a high-temperature compressor and a second heat exchanger which are connected through pipelines, and the high-temperature heat pump circulation assembly is used for heating circulating return air.
The heat exchanger is provided with a first inlet, a second inlet, a first outlet and a second outlet, the first inlet of the heat exchanger is communicated with an exhaust pipeline of the coating machine, the second inlet of the heat exchanger is communicated with the surface cooler, the first outlet of the heat exchanger is sequentially communicated with the low-temperature evaporator and the surface cooler, and the second outlet of the heat exchanger is sequentially communicated with the high-temperature condenser and the return pipeline of the coating machine.
The surface cooler is provided with a third inlet, a chilled water inlet, a third outlet and a chilled water outlet, the third inlet of the surface cooler is communicated with the low-temperature evaporator, the third outlet of the surface cooler is communicated with the second inlet of the heat exchanger, and chilled water enters the surface cooler through the chilled water inlet and is discharged through the chilled water outlet.
Preferably, the third outlet of the surface cooler is communicated with a tail gas discharge pipeline.
Preferably, the low-temperature heat pump circulation assembly is provided with a low-temperature expansion valve.
Preferably, the high-temperature heat pump circulation assembly is provided with a high-temperature expansion valve.
Preferably, a first fan is arranged on the exhaust pipeline of the coating machine.
Preferably, a second fan is arranged between the surface cooler and the heat exchanger.
The technical scheme discloses an NMP recovery device for partially recovering low-temperature heat, which comprises a heat exchanger, a low-temperature heat pump circulation assembly, a surface cooler and a high-temperature heat pump circulation assembly; the heat exchanger, the low-temperature heat pump circulation assembly and the surface cooler form a first circulation loop, the heat exchanger is communicated with an exhaust pipeline of the coating machine, NMP waste gas exhausted by the exhaust pipeline of the coating machine is subjected to first cooling through the heat exchanger, and part of NMP is condensed into liquid state, so that recovery of NMP is realized; the heat exchanger and the high-temperature heat pump circulating assembly form a second circulating loop, the high-temperature heat pump circulating assembly is communicated with the coating machine return air pipeline, and circulating return air is heated by the high-temperature heat pump circulating assembly and then returns to the coating machine return air pipeline. In this technical scheme, carry out multistage cooling to NMP waste gas through heat exchanger, low temperature evaporator, surface cooler, can realize the condensation recovery of NMP, through setting up circulation return air pipeline, make the gas after the NMP is retrieved heat and get back to in the coating machine again through heat exchanger, high temperature condenser, realize exhaust energy recovery.
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 the structure of an NMP recovery apparatus according to an embodiment of the present utility model.
Wherein: 1. a heat exchanger; 2. a low temperature heat pump cycle assembly; 21. a low temperature evaporator; 22. a low temperature expansion valve; 23. a low temperature compressor; 3. a high temperature heat pump cycle assembly; 31. a high temperature condenser; 32. a high temperature compressor; 33. a high temperature expansion valve; 41. a second heat exchanger; 5. a surface cooler;
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 partially recovering low-temperature heat, which is shown in figure 1 and comprises a heat exchanger 1, a low-temperature heat pump circulation assembly 2, a surface cooler 5 and a high-temperature heat pump circulation assembly 3; the heat exchanger 1, the low-temperature heat pump circulation assembly 2 and the surface cooler 5 form a first circulation loop, the heat exchanger 1 is communicated with an exhaust pipeline of the coating machine, NMP waste gas exhausted by the exhaust pipeline of the coating machine is subjected to first cooling through the heat exchanger 1, and part of NMP is condensed into liquid state, so that recovery of NMP is realized; the heat exchanger 1 and the high-temperature heat pump circulation assembly 3 form a second circulation loop, the high-temperature heat pump circulation assembly 3 is communicated with a coating machine return air pipeline, and circulation return air is heated by the high-temperature heat pump circulation assembly 3 and then returns to the coating machine return air pipeline.
The low-temperature heat pump circulation assembly 2 comprises a low-temperature evaporator 21, a low-temperature compressor 23 and a second heat exchanger 41 which are connected through pipelines, the low-temperature heat pump circulation assembly 2 is used for reducing the temperature of NMP waste gas, a low-temperature refrigerant in the low-temperature evaporator 21 is used for evaporating and absorbing heat, so that the NMP waste gas is cooled and condensed, the NMP waste gas flows through the low-temperature evaporator 21 and then is cooled for the second time, part of NMP is condensed into a liquid state, the concentration of NMP in the NMP waste gas is further reduced, and the recovery of NMP can be realized; after the refrigerant in the low-temperature evaporator 21 absorbs heat, the refrigerant sequentially acts on the low-temperature evaporator 21, the low-temperature compressor 23 and the second heat exchanger 41 in the low-temperature heat pump circulation assembly 2 to form low-temperature low-pressure liquid, and the low-temperature low-pressure liquid returns to the low-temperature evaporator 21 again to cool and condense NMP waste gas so as to realize the recovery of NMP.
The high-temperature heat pump circulation assembly 3 comprises a high-temperature condenser 31, a high-temperature compressor 32 and a second heat exchanger 41 which are connected through pipelines, the high-temperature heat pump circulation assembly 3 is used for heating circulation return air, the high-temperature condenser 31 is used for reheating the circulation return air, the circulation return air is heated by the high-temperature condenser 31 and then returns to a return air pipeline of the coating machine, high-temperature refrigerant in the high-temperature condenser 31 forms high-temperature high-pressure liquid in the high-temperature heat pump circulation assembly 3 through the second heat exchanger 41 and the high-temperature compressor 32 and returns to the 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 of the coating machine after reaching the preset temperature, partial heat recovery of high-temperature waste gas can be realized, and the energy consumption of the coating machine due to heating return air or fresh air is reduced.
The heat exchanger 1 is provided with a first inlet, a second inlet, a first outlet and a second outlet, the first inlet of the heat exchanger 1 is communicated with an exhaust pipeline of the coating machine, the first outlet of the heat exchanger 1 is sequentially communicated with the low-temperature evaporator 21 and the surface cooler 5, and during operation, NMP waste gas sequentially flows through the heat exchanger 1 and the low-temperature heat pump circulation assembly 2 for first cooling and second cooling, and then enters the surface cooler 5 for third cooling, so that efficient recovery of NMP can be realized; the surface cooler 5 is connected with the second inlet of the heat exchanger 1, and 95% of the gas flowing out of the surface cooler 5 returns to the heat exchanger 1 to act again in a circulating return air mode, and the remaining 5% of the gas is discharged through a tail gas discharge pipeline; the second outlet of the heat exchanger 1 is sequentially communicated with the high-temperature condenser 31 and the coating machine return air pipeline, and circulating return air enters the high-temperature condenser 31 for reheating after being heated by the heat exchanger 1, then enters the coating machine return air pipeline and returns to the coating machine again, so as to meet the air quantity and temperature requirements in the coating machine.
The surface cooler 5 is provided with a third inlet, a chilled water inlet, a third outlet and a chilled water outlet, the third inlet of the surface cooler 5 is communicated with the low-temperature evaporator 21, the third outlet of the surface cooler 5 is communicated with the second inlet of the heat exchanger 1, chilled water enters the surface cooler 5 through the chilled water inlet and is discharged from the chilled water outlet, and the chilled water flows through the surface cooler 5 to cool NMP waste gas entering the surface cooler 5.
Specifically, the third outlet of the surface cooler 5 is communicated with an exhaust gas discharge pipeline.
Specifically, the low-temperature heat pump cycle assembly 2 further includes a low-temperature expansion valve 22, the low-temperature expansion valve 22 is disposed between the low-temperature evaporator 21 and the second heat exchanger 41, and the medium-temperature and high-pressure liquid refrigerant is throttled by the low-temperature expansion valve 22 to be a low-temperature and low-pressure liquid refrigerant and flows back to the low-temperature evaporator 21 to act.
Specifically, the high temperature heat pump cycle 3 further includes a high temperature expansion valve 33, the high temperature expansion valve 33 is disposed between the high temperature condenser 31 and the second heat exchanger 41, and the low temperature liquid flowing out from the high temperature condenser 31 forms high temperature liquid through the high temperature expansion valve 33 and enters the second heat exchanger 41.
Wherein, be equipped with first fan 61 on the coating machine exhaust pipe to guarantee that the NMP waste gas of coating machine exhaust continuously gets into heat exchanger 1 and acts on.
Wherein, a second fan is arranged between the surface cooler 5 and the heat exchanger 1, so that the circulating return air discharged by the surface cooler 5 returns to the heat exchanger 1 and is heated again.
In a specific embodiment, NMP waste gas with the temperature of 110 ℃ discharged by an exhaust pipeline of a coating machine enters a heat exchanger 1 for first cooling and condensation, the NMP waste gas is cooled to 42 ℃ by the heat exchanger 1, part of NMP is condensed into liquid for recycling, then the NMP waste gas with the temperature of 42 ℃ enters a low-temperature evaporator 21 for second cooling to 28 ℃, and in the process, a low-temperature heat pump circulation assembly 2 circulates cooling liquid to ensure that low-temperature refrigerant is always arranged in the low-temperature evaporator 21 for cooling the NMP waste gas; then, the NMP waste gas at 28 ℃ enters the surface cooler 5, the temperature of the NMP waste gas is reduced to below 15 ℃ under the action of chilled water, and the NMP of the NMP waste gas is condensed into liquid and separated from the gas in the gradual cooling process, so that the recovery of the NMP is realized.
The gas exhausted by the surface cooler 5 is divided into two parts, one part (about 5%) is used as waste gas to be exhausted through a tail gas exhaust pipeline, the other part (about 95%) is used as circulating return air to flow back to the heat exchanger 1 again to be heated to 92 ℃, then the circulating return air enters the high-temperature condenser 31 to be heated again to 120 ℃, in the process, the high-temperature heat pump circulating assembly 3 carries out circulating heating on the high-temperature refrigerant so as to meet the condition that the high-temperature refrigerant is always arranged in the high-temperature condenser 31 to heat the circulating return air, and the circulating return air enters a return air pipeline of the coating machine and returns to the coating machine again so as to meet the use requirements of air quantity and temperature in the coating machine, and the recovery of exhaust energy is realized.
The NMP recovery device for partially recovering low-temperature heat comprises a heat exchanger, a low-temperature heat pump circulation assembly, a surface cooler and a high-temperature heat pump circulation assembly; the heat exchanger, the low-temperature heat pump circulation assembly and the surface cooler form a first circulation loop, the heat exchanger is communicated with an exhaust pipeline of the coating machine, NMP waste gas exhausted by the exhaust pipeline of the coating machine is subjected to first cooling through the heat exchanger, and part of NMP is condensed into liquid state, so that recovery of NMP is realized; the heat exchanger and the high-temperature heat pump circulating assembly form a second circulating loop, the high-temperature heat pump circulating assembly is communicated with the coating machine return air pipeline, and circulating return air is heated by the high-temperature heat pump circulating assembly and then returns to the coating machine return air pipeline. According to the technical scheme, the NMP waste gas is subjected to multistage cooling through the heat exchanger, the low-temperature evaporator and the surface cooler, so that the condensation recovery of NMP can be realized, and the gas after the recovery of NMP is heated through the heat exchanger and the high-temperature condenser and returns to the coating machine again through the circulating return pipeline, so that the recovery of exhaust energy is realized; moreover, the low-temperature heat pump circulation assembly and the high-temperature heat pump circulation assembly share the second heat exchanger, and the heat absorbed by the second heat exchanger in the low-temperature heat pump circulation assembly can be used by the low-temperature heat pump circulation assembly, so that the design is ingenious, the running energy consumption of the system is the lowest, 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 (8)
1. The NMP recovery device for partially recovering low-temperature heat is characterized by comprising a heat exchanger, a low-temperature heat pump circulation assembly, a surface cooler and a high-temperature heat pump circulation assembly;
The heat exchanger, the low-temperature heat pump circulation assembly and the surface cooler form a first circulation loop, and the heat exchanger is communicated with an exhaust pipeline of the coating machine;
The heat exchanger and the high-temperature heat pump circulation assembly form a second circulation loop, and the high-temperature heat pump circulation assembly is communicated with a return air pipeline of the coating machine;
The low-temperature 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 high-temperature heat pump circulation assembly comprises a high-temperature condenser, a high-temperature compressor and a second heat exchanger which are connected through pipelines, and the high-temperature heat pump circulation assembly is used for heating circulating return air.
2. The NMP recovery unit of claim 1 wherein said heat exchanger has a first inlet, a second inlet, a first outlet, and a second outlet, said first inlet of said heat exchanger being in communication with said coater exhaust line, said second inlet of said heat exchanger being in communication with said surface cooler, said first outlet of said heat exchanger being in communication with said low temperature evaporator, said surface cooler, said second outlet of said heat exchanger being in communication with said high temperature condenser, said coater return line.
3. The NMP recovery unit of claim 1, wherein said surface cooler has a third inlet, a chilled water inlet, a third outlet, and a chilled water outlet, said third inlet of said surface cooler being in communication with said low temperature evaporator, said third outlet of said surface cooler being in communication with said second inlet of said heat exchanger, chilled water entering said surface cooler through said chilled water inlet and being discharged through said chilled water outlet.
4. A NMP recovery unit for partially recovering heat at low temperature according to claim 3, wherein said third outlet of said surface cooler is connected to a tail gas discharge line.
5. The NMP recycling device for partially recycling heat at low temperature according to claim 1, wherein the low temperature heat pump circulation assembly is provided with a low temperature expansion valve.
6. The NMP recovery unit for partially recovering heat at low temperature according to claim 1, wherein said high temperature heat pump cycle assembly is provided with a high temperature expansion valve.
7. The NMP recycling device for partially recycling heat at low temperature according to claim 1, wherein a first fan is arranged on an exhaust pipeline of the coater.
8. The NMP recovery unit for partially recovering heat at low temperature according to claim 1, wherein a second fan is provided between said surface cooler and said heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322614447.5U CN220801989U (en) | 2023-09-25 | 2023-09-25 | NMP recovery device for partially recovering low-temperature heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322614447.5U CN220801989U (en) | 2023-09-25 | 2023-09-25 | NMP recovery device for partially recovering low-temperature heat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220801989U true CN220801989U (en) | 2024-04-19 |
Family
ID=90710157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322614447.5U Active CN220801989U (en) | 2023-09-25 | 2023-09-25 | NMP recovery device for partially recovering low-temperature heat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220801989U (en) |
-
2023
- 2023-09-25 CN CN202322614447.5U patent/CN220801989U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201954828U (en) | Efficient and energy-saving lithium bromide refrigerator | |
| CN105042931A (en) | Combined heat pump system adopting trans-critical circulation and absorption heat pump co-production | |
| CN106595117A (en) | Heat pump system | |
| CN103574967B (en) | The air conditioner and heat pump unit of a kind of band anti-freezing solution regenerating unit | |
| CN105004095A (en) | Compound heat pump system for co-production by adopting trans-critical circle and two-stage absorption type heat pump cycle | |
| CN110553420A (en) | Ammonia absorption type refrigerating system based on lithium bromide unit | |
| CN204202062U (en) | With the water-cooled cooling water air conditioner unit of ice-reserving function | |
| CN110986443B (en) | Heat source tower heat pump system of combined ice maker | |
| CN219810071U (en) | Heat exchange system | |
| CN220801989U (en) | NMP recovery device for partially recovering low-temperature heat | |
| CN113993360B (en) | Energy-saving cooling system and method for data center | |
| CN105066502A (en) | Direct burning absorption refrigeration method and device for recovering phase change heat | |
| CN115435386A (en) | Solar absorption type refrigerating system, control method and electronic equipment | |
| CN211876414U (en) | Hot water type lithium bromide absorption water chilling unit driven by ultralow temperature waste heat | |
| CN205718040U (en) | Solar energy, geothermal energy auxiliary CO2trans-critical cycle refrigerating and heat-supplying system | |
| CN220818132U (en) | NMP recovery device for recovering low-temperature heat and generating waste heat | |
| CN206247693U (en) | Superposition type solution series mono-potency lithium bromide absorption type refrigeration heat pump unit | |
| CN110500688A (en) | The diluting type refrigeration heat pump system of air conditioning is carried out using the heat of dilution | |
| CN104235984B (en) | Heat source tower heat pump air-conditioner set with ice-reserving function | |
| CN219868242U (en) | Low dew point dehumidifier | |
| CN205156454U (en) | Freezer heat recovery is towards white system | |
| CN218379971U (en) | Flue gas waste heat recovery system | |
| CN114251864B (en) | Absorption refrigerator | |
| CN205079495U (en) | Retrieve direct combustion formula absorption refrigeration device of heat of transformation | |
| CN220336976U (en) | Gas turbine system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |