CN108096977A - The processing method and system for the exhaust gas that lithium battery recovery processing generates in the process - Google Patents
The processing method and system for the exhaust gas that lithium battery recovery processing generates in the process Download PDFInfo
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- CN108096977A CN108096977A CN201711464757.6A CN201711464757A CN108096977A CN 108096977 A CN108096977 A CN 108096977A CN 201711464757 A CN201711464757 A CN 201711464757A CN 108096977 A CN108096977 A CN 108096977A
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- 238000012545 processing Methods 0.000 title claims abstract description 54
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000011084 recovery Methods 0.000 title claims abstract description 36
- 238000003672 processing method Methods 0.000 title claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 51
- 238000010521 absorption reaction Methods 0.000 claims abstract description 36
- 239000003792 electrolyte Substances 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims description 136
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 46
- 238000001179 sorption measurement Methods 0.000 claims description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 28
- 239000002808 molecular sieve Substances 0.000 claims description 26
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 26
- 229910052757 nitrogen Inorganic materials 0.000 claims description 23
- 238000001816 cooling Methods 0.000 claims description 21
- 238000003795 desorption Methods 0.000 claims description 21
- 239000003610 charcoal Substances 0.000 claims description 17
- 239000000428 dust Substances 0.000 claims description 16
- 239000002250 absorbent Substances 0.000 claims description 15
- 230000002745 absorbent Effects 0.000 claims description 15
- 238000004064 recycling Methods 0.000 claims description 13
- 239000003960 organic solvent Substances 0.000 claims description 11
- 238000009833 condensation Methods 0.000 claims description 7
- 230000005494 condensation Effects 0.000 claims description 7
- 230000003213 activating effect Effects 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000005416 organic matter Substances 0.000 claims description 5
- 230000001172 regenerating effect Effects 0.000 claims description 5
- 230000008929 regeneration Effects 0.000 claims description 5
- 238000011069 regeneration method Methods 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 230000003628 erosive effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000006978 adaptation Effects 0.000 abstract 1
- 208000028659 discharge Diseases 0.000 description 10
- 239000002253 acid Substances 0.000 description 7
- 229910052736 halogen Inorganic materials 0.000 description 5
- 150000002367 halogens Chemical class 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 125000005587 carbonate group Chemical group 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- -1 hexafluoro phosphorus Chemical compound 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
Abstract
The invention discloses the processing methods and system of the exhaust gas that lithium battery recovery processing generates in the process, including dry-type filtering apparatus, cryogenic system and secondary absorption device, the access port of dry-type filtering apparatus is connected with cleaner, cleaner is connected respectively with level-one breaker, multiple stage crushing sorting unit and the electrolyte drying unit in lithium battery recovery and processing system, dry-type filtering apparatus is connected respectively with cryogenic system and secondary absorption device, cryogenic system is connected with secondary absorption device, and secondary absorption device is equipped with gas discharge outlet.It the advantage is that, the exhaust gas of each processing step of lithium battery recovery and processing system is separately handled, for different exhaust gas properties, using different recovery processing techniques, recycle more efficient, the more unstable operating mode of adaptation enterprise discharge exhaust gas, with the energy consumption of reasonably optimizing complete equipment.
Description
Technical field
It is generated in the process the present invention relates to cell exhaust gases processing technology field more particularly to a kind of recovery processing of lithium battery
The processing method and system of exhaust gas.
Background technology
Recently, country encourages the ready to appear of personal purchase new-energy automobile policy, this burning hot new-energy automobile of order
Association industry heats up once again.New-energy automobile mainly includes upstream lithium battery and motor raw material, middle reaches motor, automatically controlled, battery
And downstream vehicle, three links of charging pile and operation.Middle reaches link battery industry chain is relatively complicated, mainly by anode,
Cathode, membrane and electrolyte composition.Zhong Shang industrial research institute issue report display, it is contemplated that domestic new-energy automobile was total in 2017
Yield is expected to reach 66.1 ten thousand, and corresponding power battery demand reaches 32.5GWh, the year two thousand twenty country new-energy automobile total output
It is expected to reach 2,000,000, corresponding power battery demand reaches 120.8GWh.It is expected that 2017-2020 new-energy automobiles are multiple every year
It is about 44.6% to close speedup, and power battery demand speedup compound every year is about 54.9%, it is contemplated that power battery cost declined
Market space speedup compound every year is about 36.8%.With the popularization of new-energy automobile, dynamic lithium battery usage amount is also at double
Increase.Although dynamic lithium battery service life and service life get well than conventional lead acid battery, nickel-cadmium cell, with service life
The replacement amount of motive force of growth lithium battery also slowly increase.The lithium battery that changes need to be recycled just must to battery into
Row is disassembled, and material sorts out recycling.Substantial amounts of organic solvent evaporates during disassemble, if this part organic solvent without
Crossing processing can serious pollution environment.
At present, the processing method of organic exhaust gas mainly has combustion method, absorption method, biological clarification, corona method and plasma
Body method of purification etc..It is disassembled due to battery and contains halogens in exhaust gas, burning can generate the substances such as carcinogenic bioxin, and halogen
The strong acid that element is formed can erosive burning equipment.Due to disassembling the organic exhaust gas higher concentration of process generation, simply use
Absorption is extremely difficult to national secondary discharge standard.Corona method and plasma for purification method, technology are not mature enough, to high-concentration waste
Gas disposal is extremely inefficient can not to reach regulation effect.In more than treatment process, all exist since halogen chance water is formed in exhaust gas
The etching apparatus of strong acid causes the possibility that technique is unable to operate normally.
The content of the invention
For overcome the deficiencies in the prior art, one of the objects of the present invention is to provide a kind of lithium batteries to be recycled process
The processing system of the exhaust gas of middle generation, for being recycled to the organic matter in exhaust gas.
The second object of the present invention is the processing method for providing the exhaust gas that a kind of lithium battery recovery processing generates in the process.
An object of the present invention adopts the following technical scheme that realization：
The processing system of exhaust gas that lithium battery recovery processing generates in the process, including dry-type filtering apparatus, cryogenic system and
Secondary absorption device, the access port of the dry-type filtering apparatus are connected with cleaner, the cleaner respectively with lithium battery
Level-one breaker, multiple stage crushing sorting unit in recovery and processing system are connected with electrolyte drying unit, the dry type
Filter plant is connected respectively with the cryogenic system and the secondary absorption device, the cryogenic system and the secondary absorption
Device is connected, and the secondary absorption device is equipped with gas discharge outlet.
Further, the cleaner is multitube parallel cyclone dust collectors, is made of erosion resistant corrosion material.
Further, the dry-type filtering apparatus includes two molecular sieve filtration towers being arranged in parallel, and the molecule is sieved through
The entrance and exit of filter tower is connected to switching device, another keeps activation again when one of molecular sieve filtration tower uses
Raw spare, the molecular sieve only adsorption moisture in the molecular sieve filtration tower.
Further, heat exchanger is equipped with before the cleaner, described in the exhaust gas process that electrolyte drying unit is discharged
Into the cleaner and the molecular sieve filtration tower after the precooling of heat exchanger, the moisture in exhaust gas is filtered off, reveals exhaust gas
Point is less than -40 DEG C.
Further, the cryogenic system includes low dew-point dehumidifying group, for the organic solvent condensate in gas to be analysed
Go out.
Further, the low dew-point dehumidifying group includes multi-stage heat exchanger, refrigerator system, cooling tower and gas-liquid separation
Tank, the multi-stage heat exchanger are connected with the dry-type filtering apparatus, and the multi-stage heat exchanger is connected with the refrigerator system
It connects, the refrigerator system is connected respectively with the cooling tower and the knockout drum, by multi-stage heat exchanger and refrigeration
Temperature≤- 35 DEG C of the exhaust gas of machine system.
Further, the secondary absorption device includes two absorbent charcoal adsorption tanks in parallel, and one of activated carbon is inhaled
Another keeps activating and regenerating spare when attached tank uses, and the absorbent charcoal adsorption tank is equipped with hot nitrogen and is desorbed equipment, for heating
Regenerated carbon, the secondary absorption device, which is equipped with, returns gas passage, and the gas passage that returns connects the secondary absorption device and institute
The access port of dry-type filtering apparatus is stated, the absorbent charcoal adsorption tank is sent desorption exhaust gas to the dry type by the gas passage that returns
Filter plant.
Further, system further includes nitrogen making machine, and the nitrogen of generation is in lithium battery recovery and processing system, the dry filter
It circulates between equipment, the cryogenic system and the secondary absorption device.
The second object of the present invention adopts the following technical scheme that realization：
A kind of processing method for the exhaust gas that lithium battery recovery processing generates in the process, includes the following steps,
Dust removal step：The exhaust gas difference that level-one breaker, multiple stage crushing sorting unit and electrolyte drying unit generate
Non-interference into cleaner, the solid powder and chip in exhaust gas are through being segregated into collector；
Drying steps：Gas enters dry-type filtering apparatus, into one of molecular sieve filtration tower, by molecular sieve adsorbed gas
Moisture in body makes the dew point of dried gas after dry, be sorted less than -40 DEG C by level-one breaker and multiple stage crushing
What device generated enter adsorption step by the exhaust gas of dust removal step, by electrolyte drying unit generate by dust removal step
Exhaust gas and by secondary absorption device desorption generate desorption exhaust gas enter deep cooling recycling step；
Deep cooling recycling step：Dried gas enters cryogenic system, and gas is condensed to -35 DEG C, makes having in gas
Solvent condensation；
Adsorption step：Two absorbent charcoal adsorption tanks that gas enters in secondary absorption device replace the organic matter in gas
Adsorption and desorption effect is carried out, after reaching standard, gas is discharged via gas discharge outlet, is such as not up to standard, then continues on through and make a living
Property charcoal suction-operated, until up to standard, the desorption exhaust gas of generation enters dry-type filtering apparatus and cryogenic system via gas passage is returned；
Whole process carries out under the protection of nitrogen.
Further, the desorption mode in adsorption step is：Regeneration desorption, nitrogen are carried out to activated carbon using the nitrogen of heating
Gas is the protection gas of lithium battery recovery and processing system leading portion.
Compared with prior art, the beneficial effects of the present invention are：
(1) exhaust gas of each processing step of lithium battery recovery and processing system is separately handled, it is special for different exhaust gas
Property, using different recovery processing techniques, recycling is more efficient, more adapts to the unstable operating mode of enterprise's discharge exhaust gas, with rationally excellent
Change the energy consumption of complete equipment.
(2) moisture is not introduced in entire processing procedure, while exhaust gas is dried, the halogen solved in exhaust gas meets water
The problem of etching apparatus of formation strong acid causes technique to be unable to operate normally；
(3) dew point of dried exhaust gas is less than the cooling temperature of cryogenic system, then using cryogenic system, recycling major part
Organic solvent, reduce carbon emission realize green circulation economy.
Description of the drawings
Fig. 1 is the flow diagram of the method for the present invention embodiment；
Fig. 2 is the structure diagram of present system embodiment.
In figure：10th, dry-type filtering apparatus；11st, molecular sieve filtration tower；12nd, switching device；20th, cryogenic system；21st, heat is handed over
Parallel operation；22nd, low dew-point dehumidifying group；23rd, multi-stage heat exchanger；24th, refrigerator system；25th, cooling tower；26th, knockout drum；
30th, secondary absorption device；31st, absorbent charcoal adsorption tank；32nd, gas discharge outlet；40th, cleaner；50th, lithium battery recovery processing system
System；51st, level-one breaker；52nd, multiple stage crushing sorting unit；53rd, electrolyte drying unit；60th, nitrogen making machine.
Specific embodiment
In the following, with reference to attached drawing and specific embodiment, the present invention is described further, it is necessary to which explanation is, not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
In the description of the present invention, it is necessary to which explanation, for the noun of locality, if any term, " " center ", " transverse direction " " are indulged
To ", " length ", " width ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ",
The indicating positions such as " bottom ", " interior ", " outer ", " clockwise ", " counterclockwise " and position relationship are based on orientation shown in the drawings or position
Relation is put, be for only for ease of the narration present invention and simplifies description rather than instruction or implies that signified device or element are necessary
It constructs and operates with specific orientation, with particular orientation, it is impossible to be interpreted as the specific protection domain of the limitation present invention.
In addition, description purpose is only used for if any term " first ", " second ", and it is not intended that indicating or implying relatively heavy
The property wanted or the implicit quantity for indicating technical characteristic." first " is defined as a result, " second " feature can be expressed or implicit include
One or more this feature, in the present description, " several " are meant that two or more, unless otherwise clearly having
The restriction of body.
In the present invention, except as otherwise clear stipulaties and restriction, should make if any term " assembling ", " connected ", " connection " term
Broad sense goes to understand, for example, it may be being fixedly connected or being detachably connected or be integrally connected；Can also be that machinery connects
It connects；It can be directly connected or be connected by intermediary, can be connected inside two elements.For ability
For the those of ordinary skill of domain, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
As shown in Figure 1 and Figure 2, the processing system for the exhaust gas that lithium battery recovery processing generates in the process, sets including dry filter
Standby 10, cryogenic system 20 and secondary absorption device 30, the access port of dry-type filtering apparatus 10 are connected with cleaner 40, and dedusting is set
Standby 40 dry respectively with level-one breaker 51, multiple stage crushing sorting unit 52 and the electrolyte in lithium battery recovery and processing system 50
Equipment for drying 53 is connected, and dry-type filtering apparatus 10 is connected respectively with cryogenic system 20 and secondary absorption device 30, cryogenic system
20 are connected with secondary absorption device 30, and secondary absorption device 30 is equipped with gas discharge outlet 32.
The exhaust gas of each processing step of lithium battery recovery and processing system 50 is separately handled, it is special for different exhaust gas
Property, using different recovery processing techniques, recycling is more efficient, more adapts to the unstable operating mode of enterprise's discharge exhaust gas, with rationally excellent
Change the energy consumption of complete equipment；Moisture is not introduced in entire processing procedure, while exhaust gas is dried, solves the halogen in exhaust gas
The problem of etching apparatus that element meets water formation strong acid causes technique to be unable to operate normally；The dew point of dried exhaust gas is less than deep cooling
The cooling temperature of device 20, then using cryogenic system 20, recycle most organic solvent, reduce carbon emission and realize green circulatory
It is economical.
Cleaner 40 is multitube parallel cyclone dust collectors, is made of erosion resistant corrosion material, can prevent hexafluoro phosphorus
Sour lithium meets the corrosion that water forms strong acid.Dust removal mechanism is that dust-contained airflow is made to rotate, by means of centrifugal force by grit from gas
It is separated in stream and is trapped in wall, then by gravity grit is made to fall into collector, suitable for non-stickiness and non-fiber
The removal of dust is used for removing 5 μm or more of particle mostly, and multitube parallel cyclone dust collectors also have 80 to 3 μm of particle
~85% efficiency of dust collection more can ensure that the safe and stable, efficient of subsequent treatment process.
Since exhaust gas subsequently wants deep condensation to -35 DEG C, and collect the exhaust gas to come and contain substantial amounts of moisture, these moisture
Frost can be not only coagulated in the evaporator of cryogenic system and is frozen causes gas passage to block, and these moisture are run into electrolyte
The electrolyte such as lithium hexafluoro phosphate can ionize and generate strong acid serious corrosion is caused to equipment, therefore, dry type is included in the system
Filter plant 10, dry-type filtering apparatus 10 include two molecular sieve filtration towers 11 being arranged in parallel, and molecular sieve filtration tower 11 enters
Mouth and outlet are connected to switching device 12, another keeps activating and regenerating standby when one of molecular sieve filtration tower 11 uses
With the molecular sieve only adsorption moisture in molecular sieve filtration tower 11, it is ensured that the progress of whole system smooth sequential.When a certain amount of useless
After gas is by one of molecular sieve filtration tower 11, the molecular sieve filtration tower 11 is closed, which lives
Change regeneration is spare, and switching device 12 starts, and follow-up exhaust gas enters another molecular sieve filtration tower 11, is filtered.
Heat exchanger 21 is equipped with before cleaner 40, it acts as carry out the exhaust gas that electrolyte drying unit 53 is discharged
Precooling makes at a temperature below 5 DEG C, into cleaner 40 and molecular sieve filtration tower 11, filter after the precooling of over-heat-exchanger 21
The moisture in exhaust gas is removed, exhaust dew point is made to be less than -40 DEG C.
Cryogenic system 20 discharges exhaust gas and desorption exhaust gas primarily directed to electrolyte drying unit 53, and in these exhaust gas
Main component is the electrolyte that carbonates form in proportion, and characteristic is higher concentration, according to saturation in its physical characteristic
The data of vapour pressure, by waste gas condensation to -35 DEG C of recyclable most organic solvents, therefore cryogenic system 20 includes low dew point
Dehumidify unit 22, and for the organic solvent condensate in gas to be precipitated, low dew-point dehumidifying group 22 is specifically for organic solvent
The efficient unit that the full explosion-proof environment of recycling research and development uses, and set and communicated with the online TVOC instrument in exhaust main road, it can intelligence
It can carry out loading, the unloading of deep cooling unit.
More specifically, it is gentle to include multi-stage heat exchanger 23, refrigerator system 24, cooling tower 25 for low dew-point dehumidifying group 22
Liquid knockout drum 26, multi-stage heat exchanger 23 are connected with dry-type filtering apparatus 10, and multi-stage heat exchanger 23 is connected with refrigerator system 24
It connects, refrigerator system 24 is connected respectively with cooling tower 25 and knockout drum 26, by multi-stage heat exchanger 23 and refrigeration machine system
Temperature≤- 35 DEG C of the exhaust gas of system 24.Cooling tower 25 provides cooling water for refrigerator system 24, and knockout drum 26 is used to collect
The organic solvent of condensation.
Exhaust gas after being filtered by dry-type filtering apparatus 10 and by 20 condensed exhaust gas of cryogenic system, also containing a certain amount of
Organic matter, discharging standards are not achieved, therefore, exhaust gas also need carry out adsorption step, into secondary absorption device 30, two level
Adsorbent equipment 30 includes two absorbent charcoal adsorption tanks 31 in parallel, another keeps when one of absorbent charcoal adsorption tank 31 uses
Activating and regenerating is spare.With activated carbon adsorption organic solvent, can further recycling design, exhaust is made to meet national environmental standard.
It before above-mentioned exhaust gas enters absorbent charcoal adsorption tank 31, can be mixed by mute flow mixing device, make the useless of different organic concentrations
Gas is uniformly mixed, and is conducive to activated carbon adsorption.
Due to adsorbent with the superposition efficiency and adsorbance of time can be slowly decline, efficiency drop to country discharge mark
It needs to regenerate activated carbon before accurate, therefore, absorbent charcoal adsorption tank 31 is equipped with hot nitrogen and is desorbed equipment, with heated nitrogen pair
Activated carbon carries out desorption and regeneration, avoids the possibility for using hot dry air Detachment Activity charcoal activated carbon being caused to catch fire.Secondary absorption
Device 30 is equipped with and returns gas passage, returns the access port of gas passage connection secondary absorption device 30 and dry-type filtering apparatus 10, activated carbon
Adsorption tanks 31 are sent exhaust gas is desorbed to dry-type filtering apparatus 10 by returning gas passage, are recycled into the condensation of cryogenic system 20.This
The protection gas of 50 leading portion of lithium battery recovery and processing system, such as the nitrogen to circulate in level-one breaker 51 can be used in the nitrogen at place
Gas can effectively be used to regenerate activated carbon, reduce investment outlay with energy consumption since this part nitrogen organic component content is low.
System further includes nitrogen making machine 60, and the nitrogen of generation is in lithium battery recovery and processing system 50, dry-type filtering apparatus 10, depth
It circulates between device for cooling 20 and secondary absorption device 30, ensures the safety of whole system.
A kind of processing method for the exhaust gas that lithium battery recovery processing generates in the process, includes the following steps,
Dust removal step：The exhaust gas difference that level-one breaker, multiple stage crushing sorting unit and electrolyte drying unit generate
Non-interference into cleaner, the solid powder and chip in exhaust gas are through being segregated into collector；
Drying steps：Gas enters dry-type filtering apparatus, into one of molecular sieve filtration tower 11, is adsorbed by molecular sieve
Moisture in gas makes the dew point of dried gas less than -40 DEG C, after dry, by level-one breaker and multiple stage crushing point
What screening device generated enters adsorption step by the exhaust gas of dust removal step, the process dust removal step generated by electrolyte drying unit
Exhaust gas and the desorption exhaust gas of generation be desorbed by secondary absorption device 30 enter deep cooling recycling step；
Deep cooling recycling step：Dried gas enters cryogenic system, and gas is condensed to -35 DEG C, makes having in gas
Solvent condensation；
Adsorption step：Two absorbent charcoal adsorption tanks that gas enters in secondary absorption device replace the organic matter in gas
Adsorption and desorption effect is carried out, after reaching standard, gas is discharged via gas discharge outlet, is such as not up to standard, then continues on through and make a living
Property charcoal suction-operated, until up to standard, the desorption exhaust gas of generation enters dry-type filtering apparatus and cryogenic system via gas passage is returned；
Whole process carries out under the protection of nitrogen.
Desorption mode in adsorption step is：Regeneration desorption carries out activated carbon using the nitrogen of heating, nitrogen is lithium electricity
The protection gas of pond recovery and processing system leading portion.
The above embodiment is only the preferred embodiment of the present invention, it is impossible to the scope of protection of the invention is limited with this,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed scope.
Claims (10)
1. the processing system for the exhaust gas that lithium battery recovery processing generates in the process, which is characterized in that including dry-type filtering apparatus, depth
Device for cooling and secondary absorption device, the access port of the dry-type filtering apparatus are connected with cleaner, the cleaner difference
It is connected with level-one breaker, multiple stage crushing sorting unit and the electrolyte drying unit in lithium battery recovery and processing system,
The dry-type filtering apparatus is connected respectively with the cryogenic system and the secondary absorption device, the cryogenic system with it is described
Secondary absorption device is connected, and the secondary absorption device is equipped with gas discharge outlet.
2. the processing system for the exhaust gas that lithium battery recovery processing as described in claim 1 generates in the process, which is characterized in that institute
Cleaner is stated as multitube parallel cyclone dust collectors, is made of erosion resistant corrosion material.
3. the processing system for the exhaust gas that lithium battery recovery processing as described in claim 1 generates in the process, which is characterized in that institute
Stating dry-type filtering apparatus includes two molecular sieve filtration towers being arranged in parallel, and the entrance and exit of the molecular sieve filtration tower is distinguished
Switching device is connected with, another holding activating and regenerating is spare when one of molecular sieve filtration tower uses, and the molecule is sieved through
Molecular sieve only adsorption moisture in filter tower.
4. the processing system for the exhaust gas that lithium battery recovery processing as claimed in claim 3 generates in the process, which is characterized in that institute
Heat exchanger is equipped with before stating cleaner, the exhaust gas of electrolyte drying unit discharge enters after the precooling of the heat exchanger
The cleaner and the molecular sieve filtration tower filter off the moisture in exhaust gas, and exhaust dew point is made to be less than -40 DEG C.
5. the processing system for the exhaust gas that lithium battery recovery processing as described in claim 1 generates in the process, which is characterized in that institute
Stating cryogenic system includes low dew-point dehumidifying group, for the organic solvent condensate in gas to be precipitated.
6. the processing system for the exhaust gas that lithium battery recovery processing as claimed in claim 5 generates in the process, which is characterized in that institute
State low dew-point dehumidifying group include multi-stage heat exchanger, refrigerator system, cooling tower and knockout drum, the multi-stage heat exchanger with
The dry-type filtering apparatus is connected, and the multi-stage heat exchanger is connected with the refrigerator system, the refrigerator system point
It is not connected with the cooling tower and the knockout drum, by the temperature of multi-stage heat exchanger and the exhaust gas of refrigerator system
≤-35℃。
7. the processing system for the exhaust gas that lithium battery recovery processing as described in claim 1 generates in the process, which is characterized in that institute
Stating secondary absorption device includes two absorbent charcoal adsorption tanks in parallel, another keeps when one of absorbent charcoal adsorption tank uses
Activating and regenerating is spare, and the absorbent charcoal adsorption tank is equipped with hot nitrogen and is desorbed equipment, and for heating regenerated carbon, the two level is inhaled
Adsorption device, which is equipped with, returns gas passage, the access returned gas passage and connect the secondary absorption device and the dry-type filtering apparatus
Mouthful, the absorbent charcoal adsorption tank is sent desorption exhaust gas to the dry-type filtering apparatus by the gas passage that returns.
8. the processing system for the exhaust gas that the lithium battery recovery processing as described in claim 1-7 any bars generates in the process, special
Sign is, further includes nitrogen making machine, the nitrogen of generation is in lithium battery recovery and processing system, the dry-type filtering apparatus, the deep cooling
It circulates between device and the secondary absorption device.
9. a kind of processing method for the exhaust gas that lithium battery recovery processing generates in the process, which is characterized in that include the following steps,
Dust removal step：The exhaust gas that level-one breaker, multiple stage crushing sorting unit and electrolyte drying unit generate respectively enters
Cleaner, non-interference, the solid powder and chip in exhaust gas are through being segregated into collector；
Drying steps：Gas enters dry-type filtering apparatus, into one of molecular sieve filtration tower, by molecular sieve adsorbed gas
Moisture, make the dew point of dried gas less than -40 DEG C, after dry, by level-one breaker and multiple stage crushing sorting unit
Generation enters adsorption step by the exhaust gas of dust removal step, the exhaust gas by dust removal step generated by electrolyte drying unit
Enter deep cooling recycling step with the desorption exhaust gas generated by secondary absorption device desorption；
Deep cooling recycling step：Dried gas enters cryogenic system, and gas is condensed to -35 DEG C, makes organic molten in gas
Agent condensation；
Adsorption step：Gas enters two absorbent charcoal adsorption tanks in secondary absorption device to the organic matter in gas alternately
Adsorption and desorption acts on, and after reaching standard, gas is discharged via gas discharge outlet, is such as not up to standard, is then continued through activated carbon
Suction-operated, until up to standard, the desorption exhaust gas of generation enters dry-type filtering apparatus and cryogenic system via gas passage is returned；
Whole process carries out under the protection of nitrogen.
10. the processing method for the exhaust gas that the lithium battery recovery processing as shown in claim 9 generates in the process, which is characterized in that
Desorption mode in adsorption step is：Regeneration desorption carries out activated carbon using the nitrogen of heating, nitrogen is at lithium battery recycling
The protection gas of reason system leading portion.
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