CN209013784U - A kind of multistage NMP recovery system - Google Patents
A kind of multistage NMP recovery system Download PDFInfo
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- CN209013784U CN209013784U CN201821412858.9U CN201821412858U CN209013784U CN 209013784 U CN209013784 U CN 209013784U CN 201821412858 U CN201821412858 U CN 201821412858U CN 209013784 U CN209013784 U CN 209013784U
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- nmp
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- tower
- recovery
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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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Abstract
The utility model discloses a kind of multistage NMP recovery system, mainly includes waste-heat recovery device and NMP recovery tower.The waste-heat recovery device has fresh air channel to be connected with exhaust steam passage to pass through coating machine, and coating machine, which will contain NMP exhaust gas and be drained into waste-heat recovery device by exhaust steam passage, carries out waste heat recycling, and fresh air enters the baking oven of coating machine after waste-heat recovery device heats up from fresh air channel.The NMP recovery tower has multilayered structure, and the bottom of the NMP recovery tower is NMP waste liquid storage unit, middle layer is heat recovery section, upper layer is gas absorption portion；NMP exhaust gas in the waste-heat recovery device enters NMP recovery tower from the tower bottom；Circulated sprinkling is arranged between the NMP waste liquid storage unit and heat recovery section to pump, the top in gas absorption portion is pumped into pure water by pure water spray.This system operating cost is very low, and recovery efficiency is high, and for tail gas clean gas 1ppm after processing hereinafter, maintenance cost is low, safety is good.
Description
Technical field
The utility model relates to apparatus field technologies, refer in particular to a kind of multistage NMP recovery system.
Background technique
In Production Process of Lithium Battery, the NMP exhaust gas for being coated with generation seriously pollutes environment, while there are relatively high for NMP exhaust gas
Economic value, be worth recycling.Mainly NMP is recycled using condensation+runner adsorption plant at present, this condensation+runner absorption
There are shortcomings for equipment: 1, needing using steam, cooling water, chilled water etc., operating cost is high.2, processing air quantity is limited, greatly
Air quantity recycling is difficult.3, it is more to be disturbed factor, processing rear molding gas concentration is unstable.4, runner need to be regularly replaced, maintenance cost is high.
5, the rate of recovery is about 95%, as there is decaying in service life.6, recovered liquid fluctuation of concentration is big.7, it needs to heat when being desorbed, and
Solvent gas concentration can be got higher, and safety is poor.Therefore it needs to develop the new equipment of one kind to recycle NMP.
Utility model content
In view of this, the utility model is in view of the existing deficiencies of the prior art, main purpose is to provide a kind of multistage NMP
Recovery system, operating cost is very low, and recovery efficiency is high, and tail gas clean gas 1ppm after processing is hereinafter, maintenance cost is low, peace
Good perfection, thus overcome the deficiencies in the prior art.
To achieve the above object, the utility model is using following technical solution:
A kind of multistage NMP recovery system, including
Waste-heat recovery device, the waste-heat recovery device have fresh air channel to be connected with exhaust steam passage to pass through coating machine, coating machine
NMP exhaust gas will be contained and be drained into waste-heat recovery device progress waste heat recycling by exhaust steam passage；Fresh air heats up through waste-heat recovery device
Enter the baking oven of coating machine from fresh air channel afterwards；
NMP recovery tower has multilayered structure, and the bottom of the NMP recovery tower is NMP waste liquid storage unit, middle layer is recuperation of heat
Portion, upper layer are gas absorption portion；NMP exhaust gas in the waste-heat recovery device enters NMP recovery tower from the tower bottom；The NMP
Circulated sprinkling is arranged between waste liquid storage unit and heat recovery section to pump, the top in gas absorption portion is pumped by pure water spray
Pure water.
As a preferred embodiment, the waste-heat recovery device is by level-one waste-heat recoverer and second level waste-heat recoverer group
At the fresh air channel and exhaust steam passage are respectively positioned between level-one waste-heat recoverer and coating machine；The second level waste-heat recoverer
It is serially connected with the downstream of level-one waste-heat recoverer.
As a preferred embodiment, the second level waste-heat recoverer is water cooling waste-heat recoverer.
As a preferred embodiment, it is provided on the channel between the second level waste-heat recoverer and NMP recovery tower tower bottom
Centrifugal blower rouses the NMP exhaust gas in second level waste-heat recoverer to NMP recovery tower bottom.
As a preferred embodiment, the gas absorption portion of the NMP recovery tower is filled out filled with multilayer alternating stainless steel ripple
Material.
As a preferred embodiment, the top of the NMP recovery tower is equipped with double-U-shaped condensation channel.
The utility model has clear advantage and beneficial effect compared with prior art, specifically, by above-mentioned technology
Scheme is it is found that due to being provided with waste-heat recovery device and NMP recovery tower, which has multilayer knot from bottom to top
Structure: bottom is NMP waste liquid storage unit, middle layer is heat recovery section, upper layer is gas absorption portion, then heat recovery section in middle level is set back
Stream spray sets pure water spray in the gas absorption portion on upper layer, sprays absorption NMP with one side, pass through the heat of vaporization of recycling on one side
NMP recovered liquid is concentrated in moisture in recovered liquid, and this system is without using steam, cooling water, chilled water etc., and operating cost is very
It is low, through this system processing rear molding gas concentration clean gas in 1ppm hereinafter, the NMP rate of recovery can reach 99%.
For the structure feature and effect for more clearly illustrating the utility model, come with reference to the accompanying drawing with specific embodiment pair
The utility model is described in detail.
Detailed description of the invention
Fig. 1 is the multistage NMP recovery system schematic diagram of the embodiment of the utility model.
Description of drawing identification:
10, waste-heat recovery device 11, fresh air channel
12, exhaust steam passage 13, level-one waste-heat recoverer
14, second level waste-heat recoverer 15, centrifugal blower
20, NMP recovery tower 21, NMP waste liquid storage unit
22, heat recovery section 23, gas absorption portion
24, double-U-shaped condensation channel 25, circulated sprinkling pump
26, pure water spray pump 30, coating machine.
Specific embodiment
It please refers to shown in Fig. 1, it to be a kind of multistage that show the specific structures of the preferred embodiment of the utility model
NMP recovery system mainly includes waste-heat recovery device 10 and NMP recovery tower 20.
Wherein, which has fresh air channel 11 to be connected with exhaust steam passage 12 to pass through coating machine 30.Coating machine
30, which will contain NMP exhaust gas, is drained into the progress waste heat recycling of waste-heat recovery device 10 by exhaust steam passage 12；Fresh air is recycled through waste heat and is filled
Set the baking oven for entering coating machine 30 after 10 heatings from fresh air channel 11.
In the present embodiment, the waste-heat recovery device 10 is by level-one waste-heat recoverer 13 and 14 groups of second level waste-heat recoverer
At the fresh air channel 11 and exhaust steam passage 12 are respectively positioned between level-one waste-heat recoverer 13 and coating machine 30；More than the second level
Heat regenerator 14 is serially connected with the downstream of level-one waste-heat recoverer 13.Waste heat recycling can also be increased when actual design according to needs
The quantity of device, is not limited to this embodiment.Wherein, the second level waste-heat recoverer 14 is water cooling waste-heat recoverer, can will be obtained
The waste heat obtained transfers to hot water.
The NMP recovery tower 20 has multilayered structure.The bottom of the NMP recovery tower 20 is NMP waste liquid storage unit 21, middle layer
It is gas absorption portion 23 for heat recovery section 22, upper layer.The top of the NMP recovery tower 20 is equipped with double-U-shaped condensation channel 24.Institute
The NMP exhaust gas stated in waste-heat recovery device 10 enters NMP recovery tower 20 from the tower bottom.NMP waste liquid storage unit 21 and heat recovery section
Circulated sprinkling is set between 22 and pumps 25, the top in gas absorption portion 23 is pumped into pure water, the purpose of spray by pure water spray pump 26
It is based on the water-soluble principle recycling nmp solution of NMP.
In the present embodiment, be provided on the channel between 20 tower bottom of the second level waste-heat recoverer 14 and NMP recovery tower from
Heart blower 15 rouses the NMP exhaust gas in second level waste-heat recoverer 14 to 20 bottom of NMP recovery tower.In the NMP recovery tower 20,
Gas absorption portion 23 replaces stainless steel ripple packing filled with multilayer, and NMP steam can be made to obtain inflation and absorbed.
The multistage NMP recovery system course of work of the utility model is as follows:
1, the exhaust gas containing NMP that coating machine 30 is discharged carries out two by level-one waste-heat recoverer 13 and second level waste-heat recoverer 14
Secondary waste heat recycling.The fresh air that coating machine 30 supplements enters coating machine 30 after heating up under the action of level-one waste-heat recoverer 13 and dries
Case saves the energy.Since second level waste-heat recoverer 14 uses water cooling, the waste heat of acquisition can be turned to do hot water.
2, the exhaust gas containing NMP that second level waste-heat recoverer 14 is discharged enters from the tower bottom of NMP recovery tower 20, utilizes the height of NMP
Water soluble nature absorbs NMP exhaust gas, and first some is dissolved in the NMP waste liquid of tower bottom after the entrance of NMP exhaust gas, i.e. realization NMP mono-
Grade adsorption recovery.
3, constantly supply pure water absorbs NMP steam to gas absorption portion 23.Due to being filled with multilayer in gas absorption portion 23
Alternately stainless steel ripple packing, fully absorbs NMP steam.Realize the recycling of NMP secondary absorption.
4, the mixed liquor for absorbing NMP flows back to the tower bottom of NMP recovery tower 20 by heat recovery section 22, is gathered in returning for tower bottom
It receives liquid and is recycled by spray pump in heat recovery section 22, and absorb the heat of exhaust gas by gas-liquid contact.Pass through the heat of recycling
The moisture in recovered liquid is evaporated, NMP recovered liquid is concentrated.Heat is taken away in moisture evaporation, while NMP is retained down, three-level absorption
NMP exhaust gas fully ensures that the tail gas of discharge reaches environmental protection standard.Humid air and the moisture being evaporated pass through double as clean gas
The discharge of U type condensation pipe.
The pure water of the multistage NMP recovery system meaning of the utility model refers to conductivity: the pure water of < 1us/cm works as enrichment
NMP liquid waste concentration reach 80%, can be confirmed by online concentration detector, then automatically extract NMP waste liquid.This system is from double
NMP is in 1ppm or less in the gas of U-shaped condensation pipe discharge.Traditional condensation+runner absorption NMP is compared below by way of chart
Method and the utility model vaporation-type spray method recycling NMP effect.
The above descriptions are merely preferred embodiments of the present invention, not makees to the technical scope of the utility model
Any restrictions, therefore any trickle amendment made by the above technical examples according to the technical essence of the present invention, equivalent change
Change and modify, is still within the scope of the technical solutions of the present invention.
Claims (6)
1. a kind of multistage NMP recovery system, it is characterised in that: including
Waste-heat recovery device (10), the waste-heat recovery device have fresh air channel (11) to be connected with exhaust steam passage (12) to pass through coating machine
(30), coating machine will contain NMP exhaust gas by exhaust steam passage (12) be drained into waste-heat recovery device (10) carry out waste heat recycling；Fresh air
Enter the baking oven of coating machine (30) from fresh air channel (11) after waste-heat recovery device (10) heating；
NMP recovery tower (20), has multilayered structure, and the bottom of the NMP recovery tower (20) is NMP waste liquid storage unit (21), middle layer
It is gas absorption portion (23) for heat recovery section (22), upper layer；NMP exhaust gas in the waste-heat recovery device (10) from the tower bottom into
Enter NMP recovery tower (20)；Circulated sprinkling is set between the NMP waste liquid storage unit (21) and heat recovery section (22) and pumps (25), institute
The top for stating gas absorption portion (23) is pumped into pure water by pure water spray pump (26).
2. a kind of multistage NMP recovery system according to claim 1, it is characterised in that: the waste-heat recovery device (10)
It is made of level-one waste-heat recoverer (13) and second level waste-heat recoverer (14)；The second level waste-heat recoverer (14) is serially connected with one
The downstream of grade waste-heat recoverer (13), the fresh air channel (11) and exhaust steam passage (12) are respectively positioned on level-one waste-heat recoverer (13)
Between coating machine (30).
3. a kind of multistage NMP recovery system according to claim 2, it is characterised in that: the second level waste-heat recoverer
It (14) is water cooling waste-heat recoverer.
4. a kind of multistage NMP recovery system according to claim 2, it is characterised in that: the second level waste-heat recoverer
(14) centrifugal blower (15) are provided on the channel between NMP recovery tower (20) tower bottom, it will be in second level waste-heat recoverer (14)
NMP exhaust gas drum to NMP recovery tower (20) tower bottom.
5. a kind of multistage NMP recovery system according to claim 1, it is characterised in that: the gas of the NMP recovery tower (20)
Body absorption portion (23) replaces stainless steel ripple packing filled with multilayer.
6. a kind of multistage NMP recovery system according to claim 1, it is characterised in that: the top of the NMP recovery tower (20)
Portion is equipped with double-U-shaped condensation channel (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821412858.9U CN209013784U (en) | 2018-08-30 | 2018-08-30 | A kind of multistage NMP recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821412858.9U CN209013784U (en) | 2018-08-30 | 2018-08-30 | A kind of multistage NMP recovery system |
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| Publication Number | Publication Date |
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| CN209013784U true CN209013784U (en) | 2019-06-21 |
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| CN201821412858.9U Active CN209013784U (en) | 2018-08-30 | 2018-08-30 | A kind of multistage NMP recovery system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112354327A (en) * | 2020-07-15 | 2021-02-12 | 万向一二三股份公司 | Low-energy-consumption NMP gas recovery tower and system |
-
2018
- 2018-08-30 CN CN201821412858.9U patent/CN209013784U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112354327A (en) * | 2020-07-15 | 2021-02-12 | 万向一二三股份公司 | Low-energy-consumption NMP gas recovery tower and system |
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Effective date of registration: 20230704 Granted publication date: 20190621 |