CN110355072A - A kind of circulating NMP recovery system of return air and its operation method - Google Patents
A kind of circulating NMP recovery system of return air and its operation method Download PDFInfo
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- CN110355072A CN110355072A CN201910736336.7A CN201910736336A CN110355072A CN 110355072 A CN110355072 A CN 110355072A CN 201910736336 A CN201910736336 A CN 201910736336A CN 110355072 A CN110355072 A CN 110355072A
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- Prior art keywords
- recovery system
- nmp
- cooling
- circulating
- return air
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- 238000011084 recovery Methods 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 69
- 238000001816 cooling Methods 0.000 claims abstract description 73
- 239000002904 solvent Substances 0.000 claims abstract description 42
- 238000004064 recycling Methods 0.000 claims abstract description 33
- 238000000576 coating method Methods 0.000 claims abstract description 28
- 239000011248 coating agent Substances 0.000 claims abstract description 25
- 229910001868 water Inorganic materials 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000007710 freezing Methods 0.000 claims description 7
- 230000008014 freezing Effects 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 235000015110 jellies Nutrition 0.000 claims description 4
- 239000008274 jelly Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 239000007774 positive electrode material Substances 0.000 abstract description 5
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 62
- 239000007789 gas Substances 0.000 description 62
- 239000000243 solution Substances 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 239000003125 aqueous solvent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000007591 painting process Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0003—Condensation of vapours; Recovering volatile solvents by condensation by using heat-exchange surfaces for indirect contact between gases or vapours and the cooling medium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
- B01D5/0075—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with heat exchanging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
- B05D3/0413—Heating with air
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating Apparatus (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention discloses a kind of circulating NMP recovery system of return air and its operation method, including pre-cooling heat recovery system, condensing solvent recovery system, cooling system, recycling liquid-storage system and coating system；The coater oven of the coating system is connect by process gas pipeline with the pre-cooling heat recovery system, condensing solvent recovery system one end is connect with the pre-cooling heat recovery system, the other end of the condensing solvent recovery system is connect with the cooling system, and the condensing solvent recovery system, which is also connected with, is provided with recycling liquid-storage system；The available high efficiente callback of NMP and process gas in the hot outlet air of coater oven are the lesser low dew point dry airs of moisture content, can meet height ratio capacity positive electrode active materials to the rigors of moisture, while operation energy consumption is relatively low.
Description
Technical field
The present invention relates to the NMP recovery technology fields in lithium ion battery production field, and in particular to a kind of return air circulation
Formula NMP recovery system and its operation method.
Background technique
In lithium ion battery production process, NMP(N- methyl pyrrolidone) it is often used as solvent when anode closes slurry,
In subsequent painting process, NMP needs are baked removal.NMP recycling is that lithium ion battery enterprise must solve the problems, such as.It is existing
NMP recovery system, be the technology for taking " heat exchange+condensation+cold water spray-absorption " or " cooling+condensation+runner absorb " mostly
Scheme.The former technology path is: process gas (the hot outlet air come out from coater oven, wherein containing a large amount of NMP steam) is first
It first exchanges heat with air inlet, return air, the process gas after heat exchange cooling is condensed again, to realize major part NMP recycling, condensation
Process gas afterwards enters back into spray column and carries out cold water spray, final to realize that NMP is almost recycled.This NMP recovery system
Coating technique requirement before can meeting, but return air humidity is larger；Latter techniques' route is: process gas (goes out from coater oven
The hot outlet air come, wherein containing a large amount of NMP steam) it exchanges heat first with air inlet, return air, the process gas after heat exchange cooling
It is condensed again, to realize major part NMP recycling, condensed process gas enters back into runner and adsorbed, and finally realizes NMP
Almost recycle.This NMP recovery system energy consumption is too big and service life is short.
Requirement with market to lithium ion battery production to humidity and energy consumption is higher and higher, existing NMP recovery process
It no longer fully meets；In this context, it is necessary to develop new NMP recovery system, with meet process gas low humidity, production it is low
The strict demand of energy consumption.
Summary of the invention
The purpose of the present invention is to provide a kind of circulating NMP recovery system of return air and its operation methods.In the system
Under processing, the available high efficiente callback of NMP and process gas in the hot outlet air of coater oven are the lesser low dew points of moisture content
Dry air can meet height ratio capacity positive electrode active materials to the rigors of moisture, while operation energy consumption is relatively low.
To achieve the above object, the circulating NMP recovery system of return air of the invention adopts the following technical scheme that: one kind is returned
Wind circulating NMP recovery system, including pre-cooling heat recovery system, condensing solvent recovery system, cooling system, recycling liquid-storage system
And coating system；The coater oven of the coating system is connect by process gas pipeline with the pre-cooling heat recovery system, institute
Condensing solvent recovery system one end is stated to connect with the pre-cooling heat recovery system, the other end of the condensing solvent recovery system with
The cooling system connection, the condensing solvent recovery system, which is also connected with, is provided with recycling liquid-storage system；The heat of coater oven goes out
The available high efficiente callback of NMP and process gas in wind are the lesser low dew point dry airs of moisture content, can meet high ratio
Capacity positive electrode active materials are to the rigors of moisture, while operation energy consumption is relatively low.
As a further improvement of the foregoing solution, the pre-cooling heat recovery system and condensing solvent recovery system are respectively provided with painting
Cloth baking oven discharges gas entrance and coater oven arranges bleeder holes；Coater oven air draft wind is provided on the process gas pipeline
Machine and coater oven air intake blower fan；Enable process gas in coating system, pre-cooling heat recovery system and condensing solvent recovery system
Middle realization circulation.
As a further improvement of the foregoing solution, connect in the pre-cooling heat recovery system and/or condensing solvent recovery system
It connects and is provided with exhaust treatment system, qualified discharge after being handled by the water absorption tower of exhaust treatment system, to realize
Meet environmental emission standard while high efficiente callback NMP.
As a further improvement of the foregoing solution, the condensing solvent recovery system includes multistage cooler, and multistage is cooling
Device and the cooling system form cooling water circulating pipe and/or freezing water circulation pipe, provide for condensing solvent recovery system
Cooling capacity；Wherein, the cooling system includes cooling tower and cool jelly water tower；The level-one cooler of the cooling tower and multistage cooler
Connection；The freezing water tower is connect with the secondary coolers of multistage cooler, and maximum energy conservation may be implemented.
As a further improvement of the foregoing solution, between the coater oven both ends connection coater oven head/trailer.According to work
Skill requires that coater oven can be carried out humidity and cleanliness controls, to keep under the low humidity and clean state of coating system
Operation.
As a further improvement of the foregoing solution, the circulating NMP recovery system of the return air is additionally provided with control system；Control
System processed is used for the operation operation of the circulating NMP recovery system of a whole set of return air.
As a further improvement of the foregoing solution, the circulating NMP recovery system of the return air is additionally provided with NMP Concentration Testing
Instrument, Temperature Humidity Sensor and level sensor；The NMP concentration detector, Temperature Humidity Sensor and level sensor with control
System connection processed, may be implemented by the connection of NMP concentration detector, Temperature Humidity Sensor and level sensor and control system
Different operational modes reaches optimal energy-saving effect.
To achieve the above object, the operation method of the circulating NMP recovery system of return air of the invention uses following technology
Scheme: the circulating NMP recovery system operation method of return air, process gas first by the coater oven of coating system, dry by coating
Case discharges high-temperature gas and enters pre-cooling heat recovery system by process gas pipeline, and coater oven discharges high-temperature gas and is condensed back to
The clean process gas of low temperature after receipts exchanges heat, and realizes pre-cooling；Process gas after heat exchange pre-cooling enters back into condensing agent recycling
System, NMP and H2O in the process gas solvent recovering system that is condensed condense out, and realize NMP recycling, after treatment
Process gas is discharged by condensing solvent recovery system, and the return air as coater oven reenters pre-cooling heat recovery system and exists
Coater oven, formation process gas circulation are returned after recuperation of heat temperature raising；Mixed solution is formed after the NMP and H2O that condense out, is mixed
It closes solution and is discharged into recycling liquid-storage system；Moisture in process gas is not affected by the external environment, to realize in the same of recycling NMP
When process gas low dew point operation is kept in coating process.
Compared with prior art, the beneficial effects of the present invention are: the NMP in the hot outlet air of coater oven available efficient time
It receives, height ratio capacity positive electrode active materials can be met to the rigors of moisture, while operation energy consumption is relatively low；
Moisture in process gas is not affected by the external environment, and keeps in coating process while recycling NMP to realize
The low dew point operation of process gas；
The exhaust gas for giving off coating system system on a small quantity can satisfy environmental requirement qualified discharge after exhaust treatment system is handled.
Pre-cooling heat recovery system is carried out by the way of waste heat recycling, that is, utilizes the low temperature return air gas after NMP condensing recovery
Body carries out heat exchange with coating system high-temperature discharge gas to make the thermal energy of system be recycled.
Detailed description of the invention
Fig. 1 show the overall schematic of the circulating NMP recovery system of return air of the present invention
Fig. 2 show the structural schematic diagram of coating system of the present invention；
Fig. 3 show the structural schematic diagram of condensing solvent recovery system of the present invention
Fig. 4 is shown between coater oven head/trailer of the present invention and coater oven attachment structure schematic diagram；
Fig. 5 show the structural schematic diagram of control system of the present invention.
In attached drawing: 1 being pre-cooling heat recovery system, 2 be condensing solvent recovery system, 3 be cooling system, 4 be vent gas treatment
System, 5 be recycling liquid-storage system, 6 be coating system, 7 be coater oven discharge gas entrance, 8 be coater oven row bleeder holes,
9 are between coater oven head/trailer, 10 be control system, 11 be NMP concentration detector, 12 be Temperature Humidity Sensor, 13 be liquid level
Inductor；31 it is cooling water circulating pipe, 32 be freezing water circulation pipe, 21 be level-one cooler, 22 is secondary coolers, 33
It is cooling tower, 34 be cool jelly water tower, 61 be process gas pipeline, 62 be coater oven, 63 be coater oven exhaust fan, 64 is
Coater oven air intake blower fan.
Specific embodiment
Below in conjunction with specific embodiment, invention is further described in detail.It should be appreciated that described herein specific
Embodiment is only used to explain the present invention, is not intended to limit the present invention.
As shown in Figs. 1-5, the circulating NMP recovery system of a kind of return air, including pre-cooling heat recovery system 1, condensing solvent return
Receipts system 2, cooling system 3, recycling liquid-storage system 5 and coating system 6；The coater oven 62 of the coating system 6 passes through technique
Gas piping 61 is connect with the pre-cooling heat recovery system 1, described 2 one end of condensing solvent recovery system and the pre-cooling recuperation of heat
System 1 connects, and the other end of the condensing solvent recovery system 2 is connect with the cooling system 3, condensing solvent recycling system
System 2, which is also connected with, is provided with recycling liquid-storage system 5.
When in use, process gas passes through coating system 6 first, and coater oven 62 discharges high-temperature gas and passes through process gas
Pipeline 61 enters the pre-cooling heat recovery system 1, and coater oven 62 discharges the clean work of low temperature after high-temperature gas and condensing recovery
Skill gas exchanges heat, and realizes pre-cooling；Process gas after heat exchange pre-cooling enters back into the condensing agent recovery system 2, process gas
NMP and H2O in body are condensed out by the condensing solvent recovery system 2, realize NMP recycling, process gas after treatment
Body is discharged by condensing solvent recovery system 2, and the return air as coater oven 62 reenters pre-cooling heat recovery system 1 in heat
Coater oven 62, formation process gas circulation are returned after recycling temperature raising；Mixed solution is formed after the NMP and H20 that condense out, is mixed
It closes solution and is discharged into recycling liquid-storage system 5；The available high efficiente callback of NMP and process gas in the hot outlet air of coater oven 62
It is the lesser low dew point dry air of moisture content, height ratio capacity positive electrode active materials can be met to the rigors of moisture, together
When operation energy consumption it is relatively low；Pre-cooling heat recovery system is carried out by the way of waste heat recycling, i.e., using low after NMP condensing recovery
Warm return air gas carries out heat exchange with coating system high-temperature discharge gas to make the thermal energy of system be recycled.
In the above-described embodiments, the pre-cooling heat recovery system 1 and condensing solvent recovery system 2 are respectively provided with coater oven row
Deflation entrance 7 and coater oven arrange bleeder holes 8；Coater oven exhaust fan 63 is provided on the process gas pipeline 61
With coater oven air intake blower fan 64；Enable process gas in coating system 6, pre-cooling heat recovery system 1 and condensing solvent recycling system
Circulation is realized in system 2.
Exhaust treatment system 4, institute are connected in the pre-cooling heat recovery system 1 and/or condensing solvent recovery system 2
When stating the normal operation of coater oven 62, a small amount of discharge gas enters exhaust treatment system 4, and the water for passing through exhaust treatment system 4 is inhaled
Qualified discharge after tower is handled is received, to realize in high efficiente callback NMP, while meeting environmental emission standard, when in use, by
In exhaust treatment system 4 by aqueous solvent to the progress NMP absorption processing of a small amount of discharge gas, between obtained nmp solvent recovered liquid
It has a rest and is emitted into recycling liquid-storage system 5.
As Figure 2-3, the condensing solvent recovery system 2 includes multistage cooler, multistage cooler and the cooling
System 3 forms cooling water circulating pipe 31 and/or freezing water circulation pipe 32, and then provides for condensing solvent recovery system 2 cold
Amount；Wherein, the cooling system 3 includes cooling tower 33 and cool jelly water tower 34；The level-one of the cooling tower 33 and multistage cooler
Cooler 21 connects；The freezing water tower 34 is connect with the secondary coolers 22 of multistage cooler；When in use, cooling tower 33 is adopted
With recirculated cooling water (32 DEG C -37 DEG C), level-one cooling is carried out by surface air cooler, the freezing water tower uses circulated refrigerated water (7
DEG C -14 DEG C) carry out that second level is cooling by surface air cooler, realize the NMP condensing recovery that coater oven 62 is discharged, it is when in use, described
Cooling system 3 uses cooling water and/or chilled water, is selected according to field condition with process requirements, preferred cooling system
Medium of uniting is cooling water, and maximum energy conservation may be implemented.
As shown in figure 4, in the above-described embodiments, process gas source is in the coater oven head/tail at 62 both ends of coater oven
Workshop 9.Humidity can be carried out to coater oven 62 according to the technological requirements and cleanliness controls, wherein 9 between coater oven head/trailer
Side be closed type structure, the other side between coater oven head/trailer described in both ends communicates with coater oven 62 and forms pulleying
Channel, and pulleying channel is gap air duct, gap air duct or narrow-gap channel；Since the air duct of coater oven 62 is enclosed, space
Controlled environment, so coater oven 62 can keep highly stable state for the process gas of drying to keep coating system
Low humidity and clean state under run.
As shown in figure 5, the circulating NMP recovery system of return air is additionally provided with control system 10；Control system 10 is used for
The operation of a whole set of circulating NMP recovery system of return air is run, and the control system 10 can be PLC control system.
In the above-described embodiments, the circulating NMP recovery system of the return air is additionally provided with NMP concentration detector 11, warm and humid
Spend sensor 12 and level sensor 13；Wherein, NMP concentration detector 11, Temperature Humidity Sensor 12 and level sensor 13 with
Control system 10 connects, and in use, NMP concentration detector 11, Temperature Humidity Sensor 12 can be set in pre-cooling recuperation of heat system
On system 1, condensing solvent recovery system 2, cooling system 3, exhaust treatment system 4, recycling liquid-storage system 5 and coating system 6；It is described
Level sensor is set to exhaust treatment system 4, recycles in liquid-storage system 5；This system passes through NMP concentration detector 11, warm and humid
Degree sensor 12 and level sensor 13 may be implemented different operational modes from the connection of control system 10 and reach optimal section
It can effect.
The circulating NMP recovery system operation method of return air of the invention, process gas pass through the coating of coating system first
Baking oven, coater oven discharge high-temperature gas and enter pre-cooling heat recovery system by process gas pipeline, and coater oven discharges high temperature
Gas exchanges heat with the clean process gas of low temperature after condensing recovery, realizes pre-cooling；Heat exchange pre-cooling after process gas again into
Entering condensing agent recovery system, the solvent recovering system that is condensed of the NMP and H2O in process gas condenses out, realize NMP recycling,
Process gas after treatment is discharged by condensing solvent recovery system, and the return air as coater oven reenters pre-cooling
Heat recovery system returns to coater oven, formation process gas circulation after recuperation of heat temperature raising；Shape after the NMP and H2O that condense out
At mixed solution, mixed solution is discharged into recycling liquid-storage system；Moisture in process gas of the invention is not affected by the external environment,
The low dew point operation of process gas is kept in coating process while recycling NMP to realize.
The above is only a preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of circulating NMP recovery system of return air, which is characterized in that including pre-cooling heat recovery system (1), condensing solvent recycling
System (2), cooling system (3), recycling liquid-storage system (5) and coating system (6)；The coater oven of the coating system (6)
(62) it is connect by process gas pipeline (61) with the pre-cooling heat recovery system (1), the condensing solvent recovery system (2) one
End is connect with the pre-cooling heat recovery system (1), the other end and the cooling system of the condensing solvent recovery system (2)
(3) it connects, the condensing solvent recovery system (2), which is also connected with, is provided with recycling liquid-storage system (5).
2. the circulating NMP recovery system of return air according to claim 1, which is characterized in that the pre-cooling heat recovery system
(1) and condensing solvent recovery system (2) is respectively provided with coater oven discharge gas entrance (7) and coater oven row bleeder holes (8).
3. the circulating NMP recovery system of return air according to claim 1, which is characterized in that the process gas pipeline
(61) coater oven exhaust fan (63) and coater oven air intake blower fan (64) are provided on.
4. the circulating NMP recovery system of return air according to claim 1, which is characterized in that the pre-cooling heat recovery system
(1) and/or in condensing solvent recovery system (2) it is connected with exhaust treatment system (4).
5. the circulating NMP recovery system of return air according to claim 1, which is characterized in that condensing solvent recycling system
System (2) includes multistage cooler, and multistage cooler and the cooling of the cooling system (3) composition are water circulating pipe (31) and/or cold
Freeze water circulation pipe (32).
6. the circulating NMP recovery system of return air according to claim 5, which is characterized in that the cooling system (3) includes
Cooling tower (33) and cool jelly water tower (34)；The cooling tower (33) connect with the level-one cooler (21) of multistage cooler；It is described
Freezing water tower (34) is connect with the secondary coolers (22) of multistage cooler.
7. the circulating NMP recovery system of return air according to claim 1, which is characterized in that the coater oven (62) two
End is connected between coater oven head/trailer (9).
8. the circulating NMP recovery system of return air described in -7 any one according to claim 1, which is characterized in that the return air
Circulating NMP recovery system is additionally provided with control system (10).
9. the circulating NMP recovery system of return air according to claim 8, which is characterized in that the circulating NMP of return air is returned
Receipts system is additionally provided with NMP concentration detector (11), Temperature Humidity Sensor (12) and level sensor (13)；The NMP concentration
Detector (11), Temperature Humidity Sensor (12) and level sensor (13) are connect with control system (10).
10. a kind of circulating NMP recovery system operation method of return air, which is characterized in that process gas passes through coating system first
Coater oven, coater oven discharge high-temperature gas enters pre-cooling heat recovery system by process gas pipeline, and coater oven is arranged
It puts high-temperature gas to exchange heat with the clean process gas of low temperature after condensing recovery, realizes pre-cooling；Process gas after heat exchange pre-cooling
Body enters back into condensing agent recovery system, and the solvent recovering system that is condensed of the NMP and H2O in process gas condenses out, and realizes NMP
Recycling, process gas after treatment is discharged by condensing solvent recovery system, and the return air as coater oven again into
Enter to be pre-chilled heat recovery system and returns to coater oven, formation process gas circulation after recuperation of heat temperature raising；The NMP that condenses out and
Mixed solution is formed after H2O, mixed solution is discharged into recycling liquid-storage system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910736336.7A CN110355072A (en) | 2019-08-09 | 2019-08-09 | A kind of circulating NMP recovery system of return air and its operation method |
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| CN201910736336.7A CN110355072A (en) | 2019-08-09 | 2019-08-09 | A kind of circulating NMP recovery system of return air and its operation method |
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| CN110355072A true CN110355072A (en) | 2019-10-22 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205774224U (en) * | 2016-05-19 | 2016-12-07 | 张建岗 | A kind of NMP in working procedure of coating lithium ion cell reclaims essence and steams purifying plant |
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2019
- 2019-08-09 CN CN201910736336.7A patent/CN110355072A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205774224U (en) * | 2016-05-19 | 2016-12-07 | 张建岗 | A kind of NMP in working procedure of coating lithium ion cell reclaims essence and steams purifying plant |
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Application publication date: 20191022 |