CN219977189U - NMP gas phase and waste heat recovery device - Google Patents
NMP gas phase and waste heat recovery device Download PDFInfo
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- CN219977189U CN219977189U CN202320857301.0U CN202320857301U CN219977189U CN 219977189 U CN219977189 U CN 219977189U CN 202320857301 U CN202320857301 U CN 202320857301U CN 219977189 U CN219977189 U CN 219977189U
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- 239000007789 gas Substances 0.000 title claims abstract description 71
- 238000011084 recovery Methods 0.000 title claims abstract description 27
- 239000002918 waste heat Substances 0.000 title claims abstract description 22
- 239000002699 waste material Substances 0.000 claims abstract description 68
- 238000009833 condensation Methods 0.000 claims abstract description 43
- 230000005494 condensation Effects 0.000 claims abstract description 43
- 239000002912 waste gas Substances 0.000 claims abstract description 28
- 239000011248 coating agent Substances 0.000 claims abstract description 21
- 238000000576 coating method Methods 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims description 87
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 239000002351 wastewater Substances 0.000 claims description 18
- 239000012528 membrane Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000012808 vapor phase Substances 0.000 claims 3
- 239000012071 phase Substances 0.000 claims 2
- 238000010409 ironing Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 4
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 82
- 238000004519 manufacturing process Methods 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 229910001416 lithium ion Inorganic materials 0.000 description 10
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 6
- 238000002955 isolation Methods 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- 230000008014 freezing Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 125000003625 D-valyl group Chemical group N[C@@H](C(=O)*)C(C)C 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 125000004122 cyclic group Chemical group 0.000 description 1
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- 238000001035 drying Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Treating Waste Gases (AREA)
Abstract
The utility model belongs to the field of waste gas phase recovery and waste heat recovery and utilization, and particularly relates to an NMP gas phase and waste heat recovery device. The first end of the heat exchange component is connected with the oil system diaphragm coating machine through an air pipe, the second end of the heat exchange component is connected with the first flow dividing valve through an air pipe, the first flow dividing valve is connected with an air inlet of the third condensation component through an air pipe in a first flow dividing direction, the second flow dividing valve is connected with an air inlet of the first condensation component through an air pipe in a first flow dividing direction, and the second flow dividing valve is connected with an air inlet of the second condensation component through an air pipe in a second flow dividing direction; the air outlet of the first condensation part is connected with the air inlet of the second condensation part through an air pipe, and the air outlet of the second condensation part and the air outlet of the third condensation part are connected with the oil system diaphragm coating machine through the heat exchange part through an air pipe. The method aims to solve the problems of energy waste, large equipment occupation space, high one-time investment and maintenance cost, complex process and the like generated in the NMP waste gas recovery process.
Description
Technical Field
The utility model belongs to the field of lithium ion oil system isolation film waste gas phase recovery and waste heat recovery and utilization, and particularly relates to an NMP gas phase and waste heat recovery device.
Background
NMP is commonly used in the chemical industry as an organic substance, and has the chemical formula of C5H9NO and the Chinese name N-methylpyrrolidone. The physical characteristics of the water-soluble oil-based emulsion are light yellow or colorless to transparent oily liquid, the water-soluble oil-based emulsion can be completely mixed with water, and the layering phenomenon after the overflow of the mixing proportion does not exist. The molecular weight 99.131, the boiling point 202 ℃ and the flash point 86.1 ℃ are slightly light in ammonia smell, and the organic solvent such as ketone, ester, hydrocarbon and the like is dissolved.
Along with the gradual expansion of the application scenes of the lithium ion battery industry, china has become the global largest new energy automobile production and manufacturing base, the lithium ion battery industry which is suitable for the new energy automobile has a wider development space in the future, and the lithium ion isolation film is particularly important in the aspect of measuring the comprehensive performance of the battery as a medium for Li+ transmission between the positive pole piece and the negative pole piece of the lithium ion battery. The lithium ion oil-based isolation membrane is mainly applied to the 3C and new energy industries, the recycling efficiency of the lithium ion isolation membrane needs to be considered when the NMP with high cost is used as a solvent for manufacturing the lithium ion isolation membrane, and the NMP can generate corresponding harm to the environment and human bodies, so that the lithium ion oil-based isolation membrane has high commercial value and important environmental protection significance when being recycled.
The method for recycling the NMP waste gas by adopting the rotating wheel concentration technology mainly utilizes the adsorption characteristic of zeolite on oily organic matters, realizes cyclic adsorption of NMP gas by adsorbing and desorbing the NMP waste gas and then assisting the regeneration reaction of the zeolite rotating wheel, and sends the desorbed high-concentration NMP gas to the next procedure for treatment, generally RTO treatment, namely industrial waste gas catalytic oxidation treatment.
The traditional freezing technology is adopted, namely, waste gas is subjected to condensation of chilled water, NMP waste gas is cooled by a surface cooler to form condensate, and trace NMP in the residual gas is subjected to water washing or rotating wheel treatment, so that the content of VOCs is reduced.
The rotating wheel concentration technology needs to utilize a rotating wheel device and an exhaust gas catalytic oxidation treatment device, equipment in the technical method is large in occupied space, high in one-time investment cost and complex in structure, meanwhile, the energy consumption of the equipment is large during operation, the rotating wheel device is not easy to maintain, and the industrial exhaust gas catalytic oxidation device adopts a combustion mode, so that potential safety hazards are large.
The traditional freezing technology adopts a condenser method to condense NMP waste gas, so that not only is the consumption of cooling water and freezing water not easy to control, but also the waste heat in the waste gas is not reused, and the waste of energy is very easy to cause. The common freezing technology is also matched with a water washing tower, the equipment in the whole technical scheme occupies large space, the maintenance procedure is complicated, and a large amount of NMP waste liquid is difficult to treat.
Disclosure of Invention
First, the technical problem to be solved
The utility model mainly aims at solving the problems that energy waste, large equipment occupation space, high one-time investment and maintenance cost, complex process and the like are generated in the NMP gas phase and waste heat recovery device.
(II) technical scheme
In order to achieve the above object, the present utility model provides an NMP gas phase and waste heat recovery apparatus, comprising:
an oil-based membrane coater configured to provide NMP high temperature exhaust gas and recover reduced temperature exhaust gas;
a heat exchange component configured to perform primary cooling treatment on the NMP high-temperature exhaust gas;
the first diverter valve is configured to conduct primary diversion on the NMP high-temperature waste gas subjected to primary cooling treatment;
a second shunt valve configured to shunt the NMP high temperature exhaust gas after the primary shunt for a second time;
a first condensing member configured to receive the NMP high temperature off-gas after the first split, the NMP high temperature off-gas being condensed in the first condensing member to form wastewater and a micro-cooler off-gas;
a second condensing part configured to receive the NMP high temperature exhaust gas after the second flow and the micro-cooled exhaust gas of the first condensing part, the NMP high temperature exhaust gas and the micro-cooled exhaust gas being condensed in the second condensing part to form wastewater and cooled exhaust gas;
a third condensing component configured to receive the initially split NMP hot off-gas, the NMP hot off-gas being condensed in the third condensing component to form wastewater and a reduced temperature off-gas;
an air duct configured to convey exhaust gas of each component;
a water conduit configured to convey the wastewater;
the first end of the heat exchange component is connected with the oil system diaphragm coating machine through an air pipe, the second end of the heat exchange component is connected with the first flow dividing valve through an air pipe, the first flow dividing valve is connected with the second flow dividing valve through an air pipe in a first flow dividing direction, the second flow dividing valve is connected with an air inlet of the third condensation component through an air pipe in a second flow dividing direction, the second flow dividing valve is connected with the air inlet of the first condensation component through an air pipe in the first flow dividing direction, and the second flow dividing valve is connected with the air inlet of the second condensation component through an air pipe; the air outlet of the first condensation component is connected with the air inlet of the second condensation component through an air pipe, and the air outlet of the second condensation component and the air outlet of the third condensation component are connected with the oil system diaphragm coating machine through the heat exchange component through an air pipe.
Further, the air conditioner further comprises an air outlet fan and a return air fan, wherein the air outlet fan is configured to provide power for NMP high-temperature waste gas in the air supply direction; the return air blower is configured to power the cooled exhaust gas in a return air direction.
Further, still include first NMP concentration detector and second NMP concentration detector, first NMP concentration detector disposes along the air-out direction on the tuber pipe between oil system diaphragm coating machine and the heat exchange component, the second NMP concentration detector disposes on the tuber pipe between heat exchange component and the return air fan, and it all is used for detecting NMP concentration.
Further, an air duct check valve is also included and is disposed on the air duct between the heat exchange component and the first diverter valve.
Further, the oil-based diaphragm coating machine also comprises a hump-type iron remover which is arranged on the air pipe between the oil-based diaphragm coating machine and the heat exchange component along the return air direction.
Further, a thermometer and a temperature transmitter are arranged at the return air end of the heat exchange component, the first condensation component, the second condensation component and the third condensation component respectively comprise a water supply end and a return water end, a first electric regulation proportional valve is arranged at the water supply end of the first condensation component, and a second electric regulation proportional valve is arranged at the water supply end of the second condensation component; the water supply end of the third condensing part is provided with a third electric regulating proportional valve.
Further, the waste liquid temporary storage device also comprises a waste liquid temporary storage tank and a first shielding pump, wherein the first shielding pump is arranged on the water conveying pipe and is used for conveying waste water in the water conveying pipe to the waste liquid temporary storage tank.
Further, the waste liquid treatment device further comprises a filter configured to filter the conveyed waste water, and the filter is configured on the water conveying pipe between the waste liquid temporary storage tank and the first shielding pump.
Further, a breather valve is arranged above the waste liquid temporary storage tank, and the breather valve is connected with the oil system diaphragm coating machine through an air pipe and the heat exchange component.
Further, the method further comprises the following steps:
the second shielding electric pump is configured to empty the waste liquid in the waste liquid temporary storage tank, and one end of the second shielding electric pump is connected with the liquid discharge end of the waste liquid temporary storage tank through a water pipe;
the liquid level switch is configured at the second end of the second shielding electric pump and is connected with the second shielding electric pump through a water pipe;
and the liquid level indication controller is configured to control the liquid level switch to be opened and closed and is in communication connection with the liquid level switch.
Further, a U-shaped bent pipe is arranged between the second canned motor pump and the waste liquid temporary storage tank.
(III) beneficial effects
Compared with the prior art, the NMP gas phase and waste heat recovery device provided by the utility model has the advantages that the temperature of the discharged NMP waste gas can be reduced by heat exchange of the plate heat exchanger, and then the discharged NMP waste gas is shunted into different condensers for condensation, so that NMP in the waste gas is recovered. In addition, the total exhaust air is split through the two splitter valves, different proportions of split flows are carried out according to different temperatures produced by different processes or different local seasons and climates, the two sets of condensing systems can be used simultaneously, waste gas recovery can be realized independently, and the energy consumption is reduced while the high-efficiency recovery of NMP gas phase is satisfied.
Drawings
FIG. 1 is a schematic diagram of an NMP gas phase and waste heat recovery device assembly according to the present utility model.
Reference numerals shown in the drawings:
10. an air outlet fan; 11. a return air blower; 12. a heat exchange member; 13. a first condensing part; 14. a second condensing part; 15. a third condensing part; 16. a first canned motor pump; 17. a second canned motor pump; 18. a filter, 19, a waste liquid temporary storage tank;
20. a total exhaust air pipe; 21. a total return air duct; 22. a first exhaust branch pipe; 23. a second exhaust branch pipe; 24. a third exhaust branch pipe; 25. a first return air branch pipe; 26. a second return air branch pipe; 27. a third return air branch pipe;
30. a first NMP concentration detector; 31. a second NMP concentration detector; 32. a thermometer; 33. a temperature transmitter; 34. a liquid level indication controller;
40. a waste liquid main pipe; 41. a first waste branch conduit; 42. a second waste branch conduit; 43. a third waste liquid branch pipeline; 44. a waste liquid discharge pipe;
50. an air duct check valve; 51. a first diverter valve; 52. a second shunt valve; 53. a first electrically-operated proportional valve; 54. a second electrically-operated proportional valve; 55. a third electrically-operated proportional valve; 56. a respiratory valve; 57. a liquid level switch;
60. hump type iron remover.
Detailed Description
The following detailed description of the present utility model, taken in conjunction with the accompanying drawings, will clearly and fully describe the technical solutions of the embodiments of the present utility model, it being evident that the described embodiments are only some, but not all, embodiments of the present utility model. 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.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a schematic diagram of an NMP gas phase and waste heat recovery device assembly according to a preferred embodiment of the present utility model is shown. The device comprises: the oil system diaphragm coating machine, the heat exchange component 12, the first flow dividing valve 51, the second flow dividing valve 52, the first condensing component 13, the second condensing component 14, the third condensing component 15, the air pipe and the water pipe.
In the embodiment shown in fig. 1, the ductwork is configured to carry the exhaust air of each component, and for convenience of description in connection with the accompanying drawings, the ductwork is configured as a total exhaust duct 20, a total return air duct 21, a first exhaust branch duct 22, a second exhaust branch duct 23, a third exhaust branch duct 24, a first return air branch duct 25, a second return air branch duct 26, and a third return air branch duct 27.
In the embodiment shown in fig. 1, the water pipe is configured to convey waste water, and also for convenience of description with reference to the drawings, the water pipe is configured as a waste water main pipe 40, a first waste water branch pipe 41, a second waste water branch pipe 42, a third waste water branch pipe 43, and a waste water discharge pipe 44.
The oil-based diaphragm coater is configured to provide NMP high-temperature exhaust gas and recycle cooling exhaust gas, for example, NMP high-temperature exhaust gas generated by the oil-based diaphragm coater is sent to the heat exchange component 12 through the main exhaust pipe 20, the heat exchange component 12 is preferably a plate heat exchanger, the plate heat exchanger is configured to perform primary cooling treatment on the NMP high-temperature exhaust gas, the temperature of the NMP exhaust gas after heat exchange is reduced to the first diverter valve 51, the first diverter valve 51 can be a three-way valve, the exhaust air volume ratio is manually adjusted according to NMP exhaust gas air volumes and temperatures corresponding to different process production temperatures and coating speeds or different seasons and climates, and the split NMP exhaust gas flows to the second diverter valve 52 and the third condensing component 15 respectively.
The NMP exhaust gas initially split by the first splitter valve 51 flows through the second splitter valve 52 and the third condenser part 15, and similarly, the second splitter valve 52 performs splitting again and flows to the air inlets of the first condenser part 13 and the second condenser part 14, respectively. It will be appreciated that a series connection is employed between the first condensing element 13 and the second condensing element 14, and that the third condensing element 15 is connected in parallel with the first condensing element 13 and the second condensing element 14.
The first condensing part 13 has a horizontal structure and condenses with cooling water at 16-22 ℃. The NMP effluent thus produced is led via a first effluent branch line 41 to an effluent main line 40. After the NMP waste gas is subjected to primary condensation, the temperature is further reduced, and the cooled gas enters the air inlet of the second condensation part 14 together with the split NMP waste gas through the first return branch pipe 25.
The second condensing part 14 condenses with chilled water at 9-12 deg.c. The NMP waste liquid produced is collected to the waste liquid main pipe 40 through the second waste liquid branch pipe 42, the NMP waste gas is subjected to secondary condensation, the temperature is reduced, and the cooled gas enters the second return air branch pipe 26.
NMP waste gas which is initially split by the first splitter valve 51 passes through the third exhaust branch pipe 24 to the air inlet of the third condensing part 15, and the third condensing part 15 adopts chilled water with the temperature of 9-12 ℃. The condensed gas is returned to a path through a third return branch pipe 27 and a second return branch pipe 26 of the second condensing part 14, and is sent to the heat exchange part, and finally returned to the oil system diaphragm coating machine production line after the temperature is increased.
In the production process of the oil-based diaphragm coating machine, a large amount of waste gas and waste liquid can be generated, wherein NMP in the waste gas is a toxic and harmful organic substance, and needs to be recovered and treated so as to achieve the purposes of environmental protection and energy saving. In addition, the total exhaust air is split through the two splitter valves, different proportions of split flows are carried out according to different temperatures produced by different processes or different local seasons and climates, the two sets of condensing systems can be used simultaneously, waste gas recovery can be realized independently, and the energy consumption is reduced while the high-efficiency recovery of NMP gas phase is satisfied.
Since the temperature of the cooling water used by the third condensing part 15 is different from that of the first condensing part, it is the same as that of the second condensing part 14 (9 to 12 ℃). So that NMP off-gas can be routed to both components for condensation treatment. This parallel arrangement can increase the condensing efficiency of the system, thereby better recovering NMP off-gas.
Preferably, the air conditioner further comprises an air outlet fan 10 and a return air fan 11, wherein the air outlet fan 10 is configured to provide power for NMP high-temperature waste gas in the air supply direction; the return air blower 11 is configured to power the cooling exhaust gas in the return air direction, and in the above embodiment, NMP exhaust gas generated by the oil-based diaphragm coater is sent to the heat exchange component 12 through the air outlet blower 10 via the total air outlet duct 20; the condensed gas is collected into one path and then is sent back to the heat exchange component 12 through the return air fan 11.
Preferably, the system further comprises a first NMP concentration detector 30 and a second NMP concentration detector 31, wherein the first NMP concentration detector 30 is arranged on the air pipe between the oil-based diaphragm coating machine and the heat exchange component 12 along the air outlet direction, and the second NMP concentration detector 31 is arranged on the air pipe between the heat exchange component 12 and the return air fan 11, and is used for detecting the NMP concentration.
In this embodiment, a first NMP concentration detector 30 is disposed between the air outlet fan 10 and the heat exchange component 12 to detect the NMP concentration of the air, and compare with the NMP concentration in the drying oven of the production line of the coating machine, so as to ensure the accuracy of NMP concentration detection of the production line. A second NMP concentration detector 31 is arranged between the return air fan 11 and the heat exchange component 12 to detect the NMP concentration of the return air, and ensure that the NMP concentration in the return air is lower than the process setting standard value.
Preferably, an air duct check valve 50 is also included, which is disposed on the air duct between the heat exchange component 12 and the first diverter valve 51. Wherein the air pipe check valve 50 can ensure that the NMP waste gas with high concentration can not return to the production line of the coating machine after the temperature reduction when the production line of the coating machine is suddenly stopped or powered off, ensure that the NMP concentration of the production line of the coating machine is below the explosion limit, and ensure the safe production of the coating machine.
Preferably, a hump-type iron remover 60 is further included, which is disposed on the total return air duct 21 between the oil-based membrane coater and the heat exchange member 12 in the return air direction. Before the return air subjected to heat exchange by the heat exchange component 12 returns to the oil system diaphragm coater through the total return air pipe 21, iron is removed at the hump type iron remover 60, and metal foreign matters possibly contained in the return air are removed, so that the metal foreign matter management and control requirements of the coater are met.
Preferably, the air return end of the heat exchange component 12 is provided with a thermometer 32 and a temperature transmitter 33, the first condensation component 13, the second condensation component 14 and the third condensation component 15 all comprise a water supply end and a water return end, the water supply end of the first condensation component 13 is provided with a first electric regulation proportional valve 53, and the water supply end of the second condensation component 14 is provided with a second electric regulation proportional valve 54; the water supply end of the third condensing part 15 is provided with a third electric adjusting proportional valve 55.
In the present embodiment, the cooling water supply flow rate of the first condensing part 13 is set to be controlled by the first electric adjusting proportional valve 53, and the cooling water supply amount can be remotely adjusted according to the temperature value fed back by the temperature transmitter 33. The chilled water supply to the second condensing unit 14 is controlled by a second electrically operated proportional valve 54, and similarly, the chilled water supply can be remotely controlled by the return air temperature value returned to the oil system diaphragm coater after heat exchange. The chilled water supply to the third condensing unit 15 is controlled by a third electrically operated proportional valve 55, which can be remotely controlled in combination with the total return air temperature.
The heat exchange component 12 air return end sets up thermometer 32, and the production of being convenient for is monitored with the maintenance personnel and is recorded, and the temperature transmitter 33 that sets up simultaneously can feed back temperature numerical value to the system, cooperates the relevant electric control valves action of condenser and then realizes the remote regulation and control of supply water volume, and according to the technology production temperature and the outdoor seasonal variation of different oil system diaphragm products, furthest reduces the holistic energy consumption of system.
Preferably, the waste liquid temporary storage tank 19 and the first shielding pump 16 are further included, and the first shielding pump 16 is arranged on the waste liquid main pipeline 40 and is used for conveying the waste water in the waste liquid main pipeline 40 to the waste liquid temporary storage tank 19.
In the present embodiment, NMP waste liquid formed by condensation is collected to a waste liquid main pipe 44 through a first waste liquid branch pipe 41, a second waste liquid branch pipe 42 and a third waste liquid branch pipe 43, and NMP waste liquid in the waste liquid main pipe 44 is conveyed to a volume of 5m by a first canned motor pump 16 3 A waste liquid temporary storage tank 19. First canned pump 16 and waste liquid temporary storage tank 19The filter 18 is arranged between the two, NMP waste liquid generated by different condensers can be collected in a centralized way, the NMP waste liquid is uniformly conveyed to the waste liquid temporary storage tank 19 by the first shielding pump 16, the waste material filtering function is realized, and the conveying pipeline is free from blockage and the waste liquid temporary storage tank is free from foreign matter precipitation.
Preferably, a breather valve 56 is arranged above the waste liquid temporary storage tank 19, and the breather valve 56 is connected with the oil system diaphragm coater through the second return air branch pipe 26 and the heat exchange component 12. When NMP waste gas with low concentration is formed in the waste liquid temporary storage tank 19, the waste liquid temporary storage tank can be sent to the second return air branch pipe 26 through the breather valve 56, so that the air pressure balance of the storage tank is maintained, and the volatilization of NMP medium is reduced.
Preferably, the device further comprises a second canned motor pump 17, a liquid level switch 57 and a liquid level indication controller 34, wherein one end of the second canned motor pump 17 is connected with the liquid draining end of the waste liquid temporary storage tank 19 through a waste liquid draining pipeline 44; the liquid level switch 57 is arranged at the second end of the second canned motor pump 17 and is connected with the second canned motor pump 17 through a water pipe; the level indication controller 34 is communicatively connected to a level switch 57.
In this embodiment, the liquid level indicator controller 34 is disposed in the temporary storage tank 19, so that the liquid level change can be observed in real time, the liquid level switch 57 is controlled to be turned on when the set liquid level reaches 80% of the effective volume of the tank body, and meanwhile, the second canned motor pump 17 is started to empty the NMP waste liquid in the tank, and when the liquid level is lower than 5% of the effective volume of the tank body, the second canned motor pump 17 and the liquid level switch 57 are automatically turned off.
As a preferable scheme of the embodiment, the gradient of the straight pipe part of the waste liquid discharge pipeline 44 between the second canned motor pump 17 and the waste liquid temporary storage tank 19 is more than or equal to 3 per mill, and meanwhile, a U-shaped bent pipe is arranged at the pipeline part close to the waste liquid temporary storage tank to seal the gas of the waste liquid temporary storage tank 19, so that the gas pressure at the two ends of the bent pipe is equal.
In the device of the utility model, a U-shaped bent pipe is arranged between the second canned motor pump 17 and the waste liquid temporary storage tank 19, so that the instantaneous pressure of a pipeline can be reduced, and the waste liquid can be prevented from flowing back. The breather valve 56 of waste liquid temporary storage tank 19 top can be with NMP waste gas exhaust in the temporary storage tank, and the liquid level indication controller 34 of jar body side can be in the opening and closing action of control liquid level switch 57 and canned motor pump when showing the liquid level, and then realizes the atmospheric pressure balance and the automatic flowing back function of waste liquid temporary storage tank 19, reduces manual operation, increases the fault-tolerant rate of waste liquid emission.
The above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model.
Claims (10)
1. An NMP vapor phase and waste heat recovery apparatus comprising:
an oil-based membrane coater configured to provide NMP high temperature exhaust gas and recover reduced temperature exhaust gas;
a heat exchange component configured to perform primary cooling treatment on the NMP high-temperature exhaust gas;
the first diverter valve is configured to conduct primary diversion on the NMP high-temperature waste gas subjected to primary cooling treatment;
a second shunt valve configured to shunt the NMP high temperature exhaust gas after the primary shunt for a second time;
a first condensing member configured to receive the NMP high temperature off-gas after the first split, the NMP high temperature off-gas being condensed in the first condensing member to form wastewater and a micro-cooler off-gas;
a second condensing part configured to receive the NMP high temperature exhaust gas after the second flow and the micro-cooled exhaust gas of the first condensing part, the NMP high temperature exhaust gas and the micro-cooled exhaust gas being condensed in the second condensing part to form wastewater and cooled exhaust gas;
a third condensing component configured to receive the initially split NMP hot off-gas, the NMP hot off-gas being condensed in the third condensing component to form wastewater and a reduced temperature off-gas;
an air duct configured to convey exhaust gas of each component;
a water conduit configured to convey the wastewater;
the first end of the heat exchange component is connected with the oil system diaphragm coating machine through an air pipe, the second end of the heat exchange component is connected with the first flow dividing valve through an air pipe, the first flow dividing valve is connected with the second flow dividing valve through an air pipe in a first flow dividing direction, the second flow dividing valve is connected with an air inlet of the third condensation component through an air pipe in a second flow dividing direction, the second flow dividing valve is connected with the air inlet of the first condensation component through an air pipe in the first flow dividing direction, and the second flow dividing valve is connected with the air inlet of the second condensation component through an air pipe; the air outlet of the first condensation component is connected with the air inlet of the second condensation component through an air pipe, and the air outlet of the second condensation component and the air outlet of the third condensation component are connected with the oil system diaphragm coating machine through the heat exchange component through an air pipe.
2. The NMP vapor and waste heat recovery unit of claim 1, further comprising an air outlet fan and a return air fan, said air outlet fan configured to power NMP high temperature waste gas in an air supply direction; the return air blower is configured to power the cooled exhaust gas in a return air direction.
3. The NMP vapor phase and waste heat recovery device of claim 2, further comprising a first NMP concentration detector and a second NMP concentration detector, wherein the first NMP concentration detector is disposed on the air duct between the oil-based membrane coater and the heat exchange component along the air outlet direction, and the second NMP concentration detector is disposed on the air duct between the heat exchange component and the return air fan, and is used for detecting NMP concentration.
4. The NMP vapor and waste heat recovery unit of claim 1, further comprising a ductal check valve disposed on the ductal between said heat exchange component and said first diverter valve.
5. The NMP vapor and waste heat recovery unit of claim 1, further comprising a hump-type de-ironing separator disposed in the return air direction on the air duct between the oil-based membrane coater and the heat exchange member.
6. The NMP gas phase and waste heat recovery device according to claim 1, wherein a thermometer and a temperature transmitter are arranged at a return air end of the heat exchange component, the first condensation component, the second condensation component and the third condensation component respectively comprise a water supply end and a water return end, a first electric regulation proportional valve is arranged at the water supply end of the first condensation component, and a second electric regulation proportional valve is arranged at the water supply end of the second condensation component; the water supply end of the third condensing part is provided with a third electric regulating proportional valve.
7. The NMP vapor phase and waste heat recovery unit of claim 1, further comprising a waste liquid temporary storage tank and a first canned motor pump disposed on said water conduit for delivering waste water in the water conduit to said waste liquid temporary storage tank; the waste liquid temporary storage tank is used for storing waste liquid, and the waste liquid temporary storage tank is used for storing waste liquid.
8. The device for recovering NMP gas phase and waste heat according to claim 7, wherein a breather valve is arranged above the waste liquid temporary storage tank, and the breather valve is connected with the oil-based diaphragm coating machine through an air pipe and the heat exchange component.
9. The NMP vapor and waste heat recovery unit of claim 7, further comprising:
the second shielding electric pump is configured to empty the waste liquid in the waste liquid temporary storage tank, and one end of the second shielding electric pump is connected with the liquid discharge end of the waste liquid temporary storage tank through a water pipe;
the liquid level switch is configured at the second end of the second shielding electric pump and is connected with the second shielding electric pump through a water pipe;
and the liquid level indication controller is configured to control the liquid level switch to be opened and closed and is in communication connection with the liquid level switch.
10. The NMP vapor and waste heat recovery unit of claim 9, wherein a U-shaped elbow is disposed between said second canned motor pump and said waste buffer tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320857301.0U CN219977189U (en) | 2023-04-17 | 2023-04-17 | NMP gas phase and waste heat recovery device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320857301.0U CN219977189U (en) | 2023-04-17 | 2023-04-17 | NMP gas phase and waste heat recovery device |
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