CN218210846U - Double-effect heat pump type NMP waste gas multi-stage condensation recovery device - Google Patents
Double-effect heat pump type NMP waste gas multi-stage condensation recovery device Download PDFInfo
- Publication number
- CN218210846U CN218210846U CN202222482545.3U CN202222482545U CN218210846U CN 218210846 U CN218210846 U CN 218210846U CN 202222482545 U CN202222482545 U CN 202222482545U CN 218210846 U CN218210846 U CN 218210846U
- Authority
- CN
- China
- Prior art keywords
- evaporator
- condenser
- heat pump
- waste gas
- waste
- 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
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
Double-effect heat pump type NMP waste gas multi-stage condensation recovery device relates to the technical field of waste gas treatment and is used for solving the problem of waste heat recovery in the NMP waste gas recovery process. The waste heat recovery heat pump system comprises a waste heat recovery heat exchanger, a first heat pump circulation assembly and a second heat pump circulation assembly, wherein the first heat pump circulation assembly comprises a first evaporator, a first throttle valve, a first condenser and a first compressor which are connected into a circulation loop; the waste heat recovery heat exchanger is connected with the coating machine, the first evaporator, the first condenser and the second condenser, the first evaporator is connected with the second evaporator, and the second evaporator is connected with the second condenser; the waste heat recovery heat exchanger, the first evaporator and the second evaporator are all connected with the NMP storage tank, and the first condenser is connected with the coating machine through a waste gas pipeline. The device can realize the recovery of waste heat when realizing NMP waste gas recovery.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a double-effect heat pump type NMP waste gas multi-stage condensation recovery device.
Background
NMP is one of the main raw materials in the manufacturing process of the lithium ion battery, and directly influences the slurry coating quality of the lithium ion battery and the requirement of environmental protection. NMP accounts for about 3-6% of the manufacturing cost of the lithium ion battery, in the manufacturing process of the battery electrode, NMP waste gas with high temperature (110-120 ℃) can be generated by a coating machine, NMP is inflammable and explosive and has toxicity, and purification treatment is required when certain concentration in air is reached. If the NMP is directly discharged after being absorbed by the waste gas tower to reach the environmental protection standard, the waste of expensive NMP can be caused; the steam is recycled in a condensation mode, namely, the steam is cooled from the gas and condensed into liquid for reuse, and the cooled waste gas or fresh air in the process needs to be subjected to heating treatment and then enters the coating machine.
Disclosure of Invention
The invention aims to provide a double-effect heat pump type NMP waste gas multi-stage condensation and recovery device, which is used for solving the problem of waste heat recovery in the process of recovering NMP waste gas.
The technical scheme adopted by the invention for solving the technical problems is as follows: the double-effect heat pump type NMP waste gas multistage condensation recovery device comprises a waste heat recovery heat exchanger, a first heat pump circulation assembly and a second heat pump circulation assembly, wherein the first heat pump circulation assembly comprises a first evaporator, a first throttle valve, a first condenser and a first compressor which are sequentially arranged and connected into a circulation loop through a circulation pipeline, and the second heat pump circulation assembly comprises a second evaporator, a second throttle valve, a second condenser and a second compressor which are sequentially arranged and connected into the circulation loop through the circulation pipeline; the waste heat recovery heat exchanger is connected with the coating machine, the first evaporator, the first condenser and the second condenser through waste gas pipelines, the first evaporator is connected with the second evaporator through a waste gas pipeline, and the second evaporator is connected with the second condenser through a waste gas pipeline; waste heat recovery heat exchanger, first evaporimeter and second evaporimeter all are connected with the NMP storage tank through the recovery tube, first condenser passes through the exhaust gas pipeline and is connected with the coating machine.
Further, a driving fan is arranged between the second evaporator and the second condenser, and the driving fan and the second evaporator, the driving fan and the second condenser are connected through waste gas pipelines.
Further, an air valve is arranged on the waste gas pipeline between the second evaporator and the second condenser.
The device further comprises an air inlet, one end of the air inlet is connected with the coating machine through a waste gas pipeline, the other end of the air inlet is connected with a hot air inlet of the waste heat recovery heat exchanger, and a filter is arranged in the air inlet.
Further, the outlet end of the first condenser is provided with an air return inlet, and the air return inlet is connected with the coating machine through an exhaust gas pipeline.
Furthermore, the waste heat recovery heat exchanger, the first evaporator and the second evaporator are located on the lower layer, and the first condenser and the second condenser are located on the upper layer.
The beneficial effects of the invention are:
(1) The utility model discloses a first, second heat pump circulation subassembly replaces traditional cooling tower and low temperature refrigeration unit cooling condensation mode, utilizes first, second evaporimeter heat absorption (the cooling condensation that is used for waste gas), first, second condenser heat release (the reheat intensification that is used for purifying waste gas) characteristics, realizes the condensation and the reheat of waste gas, has realized the total heat recovery of high temperature waste gas, greatly reduced the coating machine because of heating the energy consumption that return air or new trend produced;
(2) A three-stage cooling and condensing mode formed by the waste heat recovery heat exchanger, the first evaporator and the second evaporator is adopted, so that the recovery rate of NMP in waste gas is improved, and the production cost of the new energy battery is effectively reduced;
(3) The structure of the utility model can realize the combination of normal temperature condensation, low temperature evaporation condensation (or ultra-low temperature deep condensation) and multi-stage condensation according to the actual conditions on site; the combination of high-temperature heat pump reheating and high-efficiency waste heat reheating (ultra-high-temperature heat pump reheating) multi-stage reheating is realized, and the mode is flexible;
(4) The utility model discloses the structure is module formula structure, can carry out the module extension according to the engineering handling capacity of reality, can realize the integrated form installation, and reduce cost adopts the compact design in addition, saves space.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the structure of the present invention;
in the figure: the device comprises a coating machine 1, a waste heat recovery heat exchanger 2, a first evaporator 3, a second evaporator 4, a first condenser 5, a second condenser 6, an NMP storage tank 7, a new energy battery production workshop 8, a first compressor 9, a first throttle valve 10, a second compressor 11, a second throttle valve 12, a compression heat pump unit 13, an air return opening 14, an air inlet 15, a filter 16, a driving fan 17, an air valve 18 and a liquid collecting tank 19.
Detailed Description
As shown in fig. 1 to fig. 2, the present invention includes a heat recovery heat exchanger 2, a first heat pump circulation component and a second heat pump circulation component, and the following description is made in conjunction with the accompanying drawings.
As shown in fig. 1 and 2, the double-effect heat pump type NMP exhaust gas multi-stage condensation recovery device comprises a waste heat recovery heat exchanger 2, a first heat pump circulation assembly and a second heat pump circulation assembly, wherein the first heat pump circulation assembly comprises a first evaporator 3, a first throttle valve 10, a first condenser 5 and a first compressor 9 which are sequentially arranged and connected into a circulation loop through a circulation pipeline, and the second heat pump circulation assembly comprises a second evaporator 4, a second throttle valve 12, a second condenser 6 and a second compressor 11 which are sequentially arranged and connected into a circulation loop through a circulation pipeline. In the first heat pump circulation assembly, a gaseous refrigerant is changed into high-temperature high-pressure refrigerating gas under the action of the first compressor 9, the high-temperature high-pressure refrigerating gas enters the first condenser 5 and then exchanges heat with low-temperature gas or water in the first condenser 5, the high-temperature high-pressure refrigerating gas is liquefied and releases heat to be the refrigerant, and the low-temperature gas or water absorbs heat to become hot air or hot water; the refrigerant is decompressed by the throttle valve and then changed into a low-temperature low-pressure liquid refrigerant, the liquid refrigerant enters the first evaporator 3 to exchange heat with high-temperature waste gas in the first evaporator 3 to become a gaseous refrigerant, and part of the high-temperature waste gas in the first evaporator 3 is condensed after the temperature is reduced. Similarly, in the second heat pump circulation assembly, the gaseous refrigerant is changed into high-temperature high-pressure refrigerant gas under the action of the second compressor 11, the high-temperature high-pressure refrigerant gas enters the second condenser 6 and then exchanges heat with low-temperature gas or water in the second condenser 6, the high-temperature high-pressure refrigerant gas is liquefied and releases heat to be refrigerant, and the low-temperature gas or water absorbs heat to become hot air or hot water; the refrigerant is decompressed by the second throttle valve 12 and then changed into a low-temperature low-pressure liquid refrigerant, the liquid refrigerant enters the first evaporator 3 to exchange heat with high-temperature exhaust gas in the first evaporator 3 to become a gaseous refrigerant, and part of the high-temperature exhaust gas in the first evaporator 3 is condensed after the temperature is reduced.
The waste heat recovery heat exchanger 2 is connected with the coating machine 1, the first evaporator 3, the first condenser 5 and the second condenser 6 through waste gas pipelines, the coating machine 1 is located in a new energy battery production workshop 8, the first evaporator 3 is connected with the second evaporator 4 through a waste gas pipeline, and the second evaporator 4 is connected with the second condenser 6 through a waste gas pipeline; waste heat recovery heat exchanger 2, first evaporimeter 3 and second evaporimeter 4 all are connected with NMP storage tank 7 through the recovery pipeline, and first condenser 5 passes through the waste gas pipeline and is connected with coating machine 1.
The temperature-reducing condensation process of the exhaust gas recovery process is described as follows:
NMP waste gas (temperature: 120 ℃, concentration 2000 ppm) generated by the coating machine 1 enters the waste heat recovery heat exchanger 2 through a pipeline, the temperature of the NMP waste gas in the waste heat recovery heat exchanger 2 is reduced, the temperature is reduced for the first time, part of NMP in the NMP waste gas is condensed into liquid, and the concentration of NMP in the NMP waste gas is reduced. The NMP waste gas (temperature: 60-70 ℃) after the primary temperature reduction enters the first evaporator 3, the NMP waste gas is subjected to secondary temperature reduction in the first evaporator 3, part of NMP is condensed into liquid state, and the concentration of NMP in the NMP waste gas is further reduced. And (3) allowing the NMP waste gas (temperature: 30-40 ℃) after secondary temperature reduction to enter a second evaporator 4, performing third temperature reduction on the NMP waste gas in the second evaporator 4, condensing part of NMP into liquid, and further reducing the temperature of the NMP waste gas to be 15-20 ℃ after the third temperature reduction, wherein the concentration of NMP in the NMP waste gas is further reduced to be less than 150 ppm. The condensed NMP liquid flows into a liquid collection tank 19 and finally into an NMP storage tank 7 for storage. The condensation, recovery and purification of the high-temperature NMP waste gas are completed, and the purified waste gas is heated for three times for recycling in order to reduce the heating energy consumption of the coating machine.
The exhaust gas heating process of the exhaust gas recovery process is described below:
the purified waste gas is discharged from the second evaporator 4 and enters the second condenser 6, the temperature of the waste gas is raised for the first time in the second condenser 6, and the temperature of the waste gas is heated to 30-40 ℃. The waste gas discharged from the second condenser 6 is subjected to secondary temperature rise in the waste heat recovery heat exchanger 2, and the temperature of the waste gas is further heated to 80-90 ℃. And finally, waste gas discharged by the waste heat recovery heat exchanger 2 enters the first condenser 5, the waste gas is heated for three times in the first condenser 5, the temperature of the waste gas is finally heated to be higher than 110 ℃, the waste gas heat of high-temperature NMP is recovered, the heated purified waste gas is conveyed back to the coating machine 1, and the energy consumption of heating equipment of the coating machine during heating is reduced.
As shown in fig. 1, in order to transport the purified exhaust gas, a driving fan 17 is disposed between the second evaporator 4 and the second condenser 6, the driving fan 17 is connected to the second evaporator 4 and the driving fan 17 is connected to the second condenser 6 through exhaust gas pipes, and the driving fan 17 transports the exhaust gas cooled by the second evaporator 4 to the second condenser 6. An air valve 18 is arranged on the waste gas pipeline between the second evaporator 4 and the second condenser 6, and after the air valve 18 is opened, partial waste gas can be discharged to maintain the negative pressure state in the coating machine 1. The exhausted waste gas is treated and then discharged into the atmosphere.
In order to facilitate assembly, an air inlet 15 is formed in the front end of the waste heat recovery heat exchanger 2, one end of the air inlet 15 is connected with the coating machine 1 through a waste gas pipeline, the other end of the air inlet 15 is connected with a hot air inlet of the waste heat recovery heat exchanger 2, a filter 16 is arranged in the air inlet 15, and the filter 16 is used for filtering impurities and particles in NMP waste gas to avoid blockage of the waste heat recovery heat exchanger 2. The outlet end of the first condenser 5 has a return air inlet 14, and the return air inlet 14 is connected with the coater 1 through an exhaust gas pipeline. The purified exhaust gas after temperature rise is returned to the coater 1 through the return air inlet 14.
In order to realize modular design and assembly, the waste heat recovery heat exchanger 2, the first evaporator 3, the second evaporator 4 and the liquid collecting tank 19 are positioned at the lower layer of the whole device, and the first condenser 5, the second condenser 6 and the driving fan 17 are positioned at the upper layer of the whole device. The first compressor 9, the second compressor 11, the first throttle valve 10 and the second throttle valve 12 are integrated into a compression heat pump unit 13 and are positioned at the upper layer of the whole device.
The invention has the beneficial effects that:
(1) The utility model discloses a first, the second heat pump circulation subassembly replaces traditional cooling tower and low temperature refrigeration unit cooling condensation mode, utilizes first, the second evaporimeter heat absorption (is used for the cooling condensation of waste gas), first, the heat release of second condenser (is used for purifying the reheat intensification) characteristics, realizes the condensation and the reheat of waste gas, has realized the total heat recovery of high temperature waste gas, greatly reduced the coating machine because of heating the energy consumption that return air or new trend produced;
(2) A three-stage cooling and condensing mode formed by the waste heat recovery heat exchanger, the first evaporator and the second evaporator is adopted, so that the recovery rate of NMP in waste gas is improved, and the production cost of the new energy battery is effectively reduced;
(3) The structure of the utility model can realize the combination of normal temperature condensation, low temperature evaporation condensation (or ultra-low temperature deep condensation) and multi-stage condensation according to the actual conditions on site; the combination of high-temperature heat pump reheating and high-efficiency waste heat reheating (ultra-high-temperature heat pump reheating) multi-stage reheating is realized, and the mode is flexible;
(4) The utility model discloses the structure is modular structure, can carry out the module extension according to the engineering handling capacity of reality, can realize the integrated form installation, and reduce cost adopts the compact design in addition, saves space.
Claims (6)
1. The double-effect heat pump type NMP waste gas multi-stage condensation recovery device is characterized by comprising a waste heat recovery heat exchanger, a first heat pump circulation assembly and a second heat pump circulation assembly, wherein the first heat pump circulation assembly comprises a first evaporator, a first throttle valve, a first condenser and a first compressor which are sequentially arranged and connected into a circulation loop through a circulation pipeline, and the second heat pump circulation assembly comprises a second evaporator, a second throttle valve, a second condenser and a second compressor which are sequentially arranged and connected into the circulation loop through the circulation pipeline; the waste heat recovery heat exchanger is connected with the coating machine, the first evaporator, the first condenser and the second condenser through waste gas pipelines, the first evaporator is connected with the second evaporator through a waste gas pipeline, and the second evaporator is connected with the second condenser through a waste gas pipeline; waste heat recovery heat exchanger, first evaporimeter and second evaporimeter all are connected with the NMP storage tank through the recovery tube, first condenser passes through the exhaust gas pipeline and is connected with the coating machine.
2. The double-effect heat pump type NMP exhaust gas multi-stage condensation and recovery device of claim 1, wherein a driving fan is arranged between the second evaporator and the second condenser, and the driving fan and the second evaporator, the driving fan and the second condenser are connected through exhaust gas pipelines.
3. The dual-effect heat pump type NMP exhaust gas multi-stage condensate recovery device of claim 2, wherein an exhaust gas conduit between the second evaporator and the second condenser is provided with an air valve.
4. The double-effect heat pump type NMP waste gas multistage condensation and recovery device of claim 1, further comprising an air inlet, wherein one end of the air inlet is connected with the coating machine through a waste gas pipeline, the other end of the air inlet is connected with a hot air inlet of the waste heat recovery heat exchanger, and a filter is arranged in the air inlet.
5. The double-effect heat pump type NMP exhaust gas multi-stage condensation recovery device according to claim 4, wherein an outlet end of the first condenser is provided with a return air inlet, and the return air inlet is connected with a coating machine through an exhaust gas pipeline.
6. The dual-effect heat pump type NMP exhaust gas multistage condensation recovery device of claim 1, wherein the waste heat recovery heat exchanger, the first evaporator, the second evaporator are located on a lower layer, and the first condenser, the second condenser are located on an upper layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222482545.3U CN218210846U (en) | 2022-09-20 | 2022-09-20 | Double-effect heat pump type NMP waste gas multi-stage condensation recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222482545.3U CN218210846U (en) | 2022-09-20 | 2022-09-20 | Double-effect heat pump type NMP waste gas multi-stage condensation recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218210846U true CN218210846U (en) | 2023-01-03 |
Family
ID=84636139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222482545.3U Active CN218210846U (en) | 2022-09-20 | 2022-09-20 | Double-effect heat pump type NMP waste gas multi-stage condensation recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218210846U (en) |
-
2022
- 2022-09-20 CN CN202222482545.3U patent/CN218210846U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208975200U (en) | A kind of multi-stage condensing device for recovering oil and gas | |
| CN210495768U (en) | Device for recycling dichloromethane of diaphragm of lithium battery by wet process through compression condensation membrane separation technology | |
| CN203100029U (en) | Machine room air conditioner | |
| CN114279254B (en) | Flue gas waste heat utilization and carbon dioxide capturing and recycling process | |
| CN101473994B (en) | Evacuating device of tobacco vacuum moisture regain box | |
| CN113587187A (en) | Flue gas waste heat recycling system and method | |
| CN101943513B (en) | Method for lowering liquid space division energy consumption | |
| CN218210846U (en) | Double-effect heat pump type NMP waste gas multi-stage condensation recovery device | |
| CN109442804B (en) | Double-stage compression heat pump circulation system for deep condensation of exhaust steam | |
| CN105314611A (en) | Dilute nitric acid device adopting double pressure method | |
| CN201062907Y (en) | Ammonia absorption cooling/heating apparatus and device for protecting decompression inside thereof | |
| CN210457918U (en) | Double-cold-heat-source heat pump sludge low-temperature drying system with waste heat recovery function | |
| CN114353364A (en) | High-temperature steam generation system and method | |
| CN220152983U (en) | Composite condenser exhaust steam waste heat recovery device | |
| CN110986425A (en) | Take vapor heat pump system of solar energy concurrent heating | |
| CN111265905A (en) | Oxidation tail gas treatment device and method for producing hydrogen peroxide by anthraquinone process | |
| CN220397891U (en) | Combined heat pump system | |
| CN113198299B (en) | Two-stage air compression and drying system and working method thereof | |
| CN214502104U (en) | Novel industrial sewage waste heat recovery step coupling heat pump system | |
| CN220818685U (en) | Separation tower waste heat utilization system and separation equipment | |
| CN216953599U (en) | High-temperature heat pump device system for recovering waste heat of cooling water | |
| CN215724264U (en) | A injection formula refrigerating system for VOC exhaust-gas treatment | |
| CN220039157U (en) | NMP waste gas cryogenic treatment device | |
| CN215216753U (en) | Cascade refrigerating unit | |
| CN211011978U (en) | Rubbish concentrate handles and heat recovery unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |