CN106207267B - A kind of lithium ion cell positive discards slurry recovery system and recovery method - Google Patents
A kind of lithium ion cell positive discards slurry recovery system and recovery method Download PDFInfo
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- CN106207267B CN106207267B CN201610662341.4A CN201610662341A CN106207267B CN 106207267 B CN106207267 B CN 106207267B CN 201610662341 A CN201610662341 A CN 201610662341A CN 106207267 B CN106207267 B CN 106207267B
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- lithium ion
- fluid bed
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- pivoted arm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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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
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The present invention discloses a kind of discarded slurry recovery system of lithium ion cell positive, including blender, filter tunnel, pivoted arm dryer, ball mill, fluid bed, packed absorber, screening machine, blender, filter tunnel, pivoted arm dryer, ball mill, fluid bed are sequentially connected end to end, the exhaust outlet bonding pad absorption tower of fluid bed, screening machine are located at the lower section of discharging port of fluidized bed.The moisture and solvent that pivoted arm dryer of the present invention bakes out are imported by exhaust pipe in fluid bed, and finally enter packed absorber with the pernicious gas in fluid bed, avoid environmental pollution.The recovery system of the present invention realizes the recycling of the discarded slurry continuous high-efficient of anode in lithium ion battery production; it not only can ensure that the purity of recovered material; and it is efficient, pollution it is small; even if performance still with good performance after long-term use; production cost is thus greatly reduced, the competitiveness of battery manufacture enterprise is improved.
Description
Technical field
The present invention relates to technical field of lithium ion, discard slurry in particular to a kind of lithium ion cell positive and return
Receipts system and recovery method.
Background technology
Lithium ion battery is high, light-weight with its energy density, service life is long, self-discharge rate is low and memory-less effect etc. is excellent
It puts and is widely used in the fields such as mobile communication, laptop, electric bicycle, electric vehicle.The master of lithium ion battery
Partly positive and negative plate, positive plate is typically that positive electrode active materials, conductive agent, binder are coated with after being uniformly mixed into slurry
Manufactured in current collector aluminum foil, wherein positive electrode active materials are generally the compound of lithium, such as cobalt acid lithium, LiMn2O4, phosphoric acid
Iron lithium etc., and positive electrode active materials account for about the 30-40% of battery totle drilling cost.
When slurry coating is made on a current collector in positive electrode active materials, each technique all inevitably will produce discarded
Slurry not only results in waste of resources, but also deals with improperly and easily cause environmental pollution.Therefore, for cost-effective, environmental protection,
It is necessary to implement recycling to the discarded slurry of anode.But discarded slurry is exposed in air for a long time, be easily mixed into impurity, foreign matter and
It will produce caking phenomenon after water suction, if being directly used in coating, thick and stiff waste slurry particle can puncture pole under the action of roll
Piece pierces through diaphragm when winding battery core, causes internal short-circuit of battery, largely effects on battery quality.
Hence it is highly desirable to a kind of process is simple, the rate of recovery is high, can serialization operation, removal process do not introduce other at
Divide and environment amenable lithium ion cell positive discards slurry recovery system.
Invention content
It is an object of the invention to overcome the prior art, provide a kind of lithium ion cell positive discard slurry recovery system and
Recovery method, the system can discard slurry to the anode generated in lithium ion battery production process and continuously be recycled, flow
Succinctly, easy to implement, organic efficiency is high and economic benefit is apparent.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of discarded slurry recovery system of lithium ion cell positive, which is characterized in that including being used to collect discarded slurry, adding
Solubilizer and the blender being stirred；Slurry after stirring is filtered to remove the filter tunnel of foreign matter, impurity；To removing
Slurry after miscellaneous is dried to remove the pivoted arm dryer of moisture and solvent；For being ground to the slurry powder after drying
The ball mill of mill；Fluid bed for removing binder, conductive agent in powder after grinding；It is discharged from fluid bed for removing
The packed absorber of pernicious gas；The screening machine being sieved to the powder finally recycled；The blender, turns filter tunnel
Arm-type dryer, ball mill, fluid bed are sequentially connected end to end, and the exhaust outlet bonding pad absorption tower of fluid bed, screening machine is located at
The lower section of discharging port of fluidized bed.
Further, it is provided with filter screen in the filter tunnel.
Further, the pivoted arm dryer includes cylinder, motor, material path, material brush, scraper, discharge gate, wherein motor
It is connect positioned at inner barrel and by supporting rod with cylinder；Material path is L-shaped, and the section of material path vertical portion is circle, and is expected
Road feed inlet is connected by bearing with cylinder top end cap, and the section of horizontal component is gradually from circle to rectangular transition；Material path end
End is by holder binder brush, and material brushes cylinder structure, the rectangular outlet of one side contacts material path, the other side and cylinder it is interior
Wall contacts；Scraper is connected in material path, and blade is contacted with cylinder inboard wall；The output rotary shaft of motor is connected with material path, and
The central axis of both material path vertical portion, output rotary shaft overlaps；The top end cap of cylinder is provided with stomata, and the discharge gate is set
It sets in the bottom of cylinder.
Further, the outer wall of the cylinder is provided with the resistance wire for being heated to pivoted arm dryer, the resistance
Silk is wrapped up by thermal insulation layer.
Invention additionally discloses a kind of lithium ion cell positives to discard slurry recovery method, includes the following steps：
（1）The anode generated in the lithium ion battery production process being collected into is discarded into slurry and is put into blender, is added former
The solvent added when preparing anode sizing agent when first producing, is stirred when adding solvent, until the caking in discarded slurry is existing
As disappearing；
（2）Slurry after stirring flows into filter tunnel, further removes foreign matter and impurity；
（3）Slurry after filtering and impurity removing enters pivoted arm dryer and removes moisture and solvent, obtains slurry powder；
（4）Slurry powder after drying enters ball mill and crushes；
（5）Slurry powder after crushing further removes no-bonder, conductive agent into fluidized bed；
（6）It is sieved to gained powder, filters out positive mix.
Further, the step（1）Middle solvent is N-Methyl pyrrolidone.
Beneficial effects of the present invention：Solvent needed for normal production is only added in the recovery system of the present invention, not
Other compositions are introduced, ensure that recycling purity；Slurry after removal of impurities enters the material path of pivoted arm dryer, when motor operates, slurry
Material gradual terminad rectangular outlet movement under the action of the centrifugal force, since material brushes contact cylinder and material path outlet, material brush side
Slurry is coated on the inner wall of cylinder by rotation side.Since cylinder is by Resistant heating, the slurry thin layer being coated on inner wall can be fast
Speed drying, and be heated evenly, scraper then scrapes slurry thin layer from cylinder inboard wall, and gained powder enters ball mill；Pivoted arm
The moisture and solvent that formula dryer bakes out are imported by exhaust pipe in fluid bed, and finally with the pernicious gas in fluid bed
Into packed absorber, environmental pollution is avoided.
The recovery system of the present invention realizes the recycling of the discarded slurry continuous high-efficient of anode in lithium ion battery production, not only
Can ensure that the purity of recovered material, and it is efficient, pollution is small, even if performance still with good performance after long-term use,
Production cost is thus greatly reduced, the competitiveness of battery manufacture enterprise is improved.
Description of the drawings
Fig. 1 is that lithium ion cell positive discards slurry recycling process diagram in the present invention；
Fig. 2 is the Space Layout Structure schematic diagram of recovery system of the present invention；
Fig. 3 is the partial schematic sectional view of pivoted arm dryer in the present invention；
Fig. 4 is that pivoted arm dryer corresponds to material path, the three dimensional structure diagram of holder and material brush in the present invention.
Specific implementation mode
Present invention is further described in detail in the following with reference to the drawings and specific embodiments.
Fig. 1 shows the recovery process of the discarded slurry of lithium ion cell positive in the present invention, first by the discarded slurry of anode
It is placed in blender, the solvent (such as NMP) needed for anode sizing agent is prepared in side addition during normal production, while being stirred, until useless
The caking abandoned in slurry disappears；Slurry after stirring removes foreign matter and impurity by filter tunnel；Then pivoted arm baking is entered back into
Dry machine further removes moisture removal and solvent；The slurry powder generated in pivoted arm dryer is put into ball mill to crush；Powder
Slurry powder after broken further removes binder, conductive agent into fluidized bed, while being generated in pivoted arm dryer harmful
Gas is also introduced into fluid bed；Finally, the pernicious gas generated in fluid bed is absorbed by packed absorber, and resulting material is screened
Machine is sieved, as anode active material of lithium ion battery.
Fig. 2 is the Space Layout Structure schematic diagram of recovery system of the present invention, and the recovery system is by blender 10, filter tunnel
20, pivoted arm dryer 30, ball mill 40, fluid bed 50, screening machine 60 and packed absorber 70 form.Wherein, blender 10,
Filter tunnel 20, pivoted arm dryer 30, ball mill 40, fluid bed 50 are sequentially connected end to end；It was provided in filter tunnel 20
Strainer 201；It is provided with stomata 301 on pivoted arm dryer 30, is imported pernicious gas in fluid bed 50 by exhaust pipe 302；Stream
Change the 501 bonding pad absorption tower 70 of exhaust outlet of bed 50；Screening machine 60 is located at the lower section of 50 discharge port 502 of fluid bed.
Fig. 3 is the partial schematic sectional view of pivoted arm dryer 30 in recovery system of the present invention, and Fig. 4 is that it corresponds to material path
305, the three dimensional structure diagram of holder 306 and material brush 307.Pivoted arm dryer 30 is mainly by cylinder 314, motor 310, material
Road 305, material brush 307, scraper 309 are constituted, and wherein motor 310 is connect by supporting rod 311 with cylinder 314；Material path 305 is in " L "
The section of shape, 305 vertical portion of material path is circle, and material path feed inlet 3051 passes through bearing 304 and 314 top end cap of cylinder
303 are connected, and the section of horizontal component is gradually from circle to rectangular transition；305 end of material path by 306 binder brush 307 of holder,
Material brush 307 cylinder structures, can rotate around center axis, the rectangular outlet of one side contacts material path 305, the other side and
The inner wall of cylinder 314 contacts；Scraper 309 is connected in material path 305, and blade is contacted with the inner wall of cylinder 314；Motor 310
It exports rotary shaft 308 to be connected with material path 305, and the central axis weight of both 305 vertical portion of material path, output rotary shaft 308
It closes；The top end cap 303 of cylinder 314 is provided with stomata 301, and imports fluid bed by the gas that exhaust pipe 302 generates drying
In 50；The outer wall of cylinder 314 is provided with resistance wire 313, for pivoted arm dryer 30 heat, while resistance wire 313 by every
Thermosphere 312 wraps up.
When starting operation, the slurry after removal of impurities enters pivoted arm dryer 30 by material path feed inlet 3051, and motor 310 operates
When, slurry is gradually moved to material path end rectangular outlet under the action of the centrifugal force, since material brush 307 contacts 314 He of cylinder respectively
Material path exports, therefore expects that slurry is coated on the inner wall of cylinder 314 by brush 307 in rotation.Since cylinder 314 is by resistance wire 313
Heating, the slurry thin layer being coated on inner wall can be dried rapidly, and is heated evenly, and scraper 309 is then by slurry thin layer from cylinder
314 inner wall of body scrapes, and gained powder enters ball mill 40 through discharge gate 315.The moisture and solvent that pivoted arm dryer 30 bakes out
It is imported into fluid bed 50 by exhaust pipe 302, and finally enters packed absorber 70 with the pernicious gas in fluid bed 50,
Avoid environmental pollution.
In conclusion continuous, the high efficiente callback that lithium ion cell positive discards slurry can be achieved in the present invention, flow is succinct,
Other compositions are not introduced into so as to which recovered material purity is effectively ensured.The harmful gas generated in pivoted arm dryer, fluid bed
Body is effectively treated, and environmental pollution is small.Recovery system of the present invention can effectively reduce the manufacturing cost of lithium ion battery and have
Good operability, safety.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
It encloses and is defined, under the premise of not departing from design spirit of the present invention, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made should all be fallen into the protection domain of claims of the present invention determination.
Claims (6)
1. a kind of lithium ion cell positive discards slurry recovery system, which is characterized in that including being used to collect discarded slurry, addition
Solvent and the blender being stirred；Slurry after stirring is filtered to remove the filter tunnel of foreign matter, impurity；To removal of impurities
Slurry afterwards is dried to remove the pivoted arm dryer of moisture and solvent；For being ground to the slurry powder after drying
Ball mill；Fluid bed for removing binder, conductive agent in powder after grinding；For removing having of being discharged from fluid bed
The packed absorber of evil gas；The screening machine being sieved to the powder finally recycled；The blender, filter tunnel, pivoted arm
Formula dryer, ball mill, fluid bed are sequentially connected end to end, the exhaust outlet bonding pad absorption tower of fluid bed, and screening machine is located at stream
Change the lower section of bed discharge port.
2. lithium ion cell positive according to claim 1 discards slurry recovery system, which is characterized in that the filtering leakage
Filter screen is provided in bucket.
3. lithium ion cell positive according to claim 1 discards slurry recovery system, which is characterized in that the pivoted arm
Dryer includes cylinder, motor, material path, material brush, scraper, discharge gate, wherein motor be located at inner barrel and by supporting rod and
Cylinder connects；Material path is L-shaped, and the section of material path vertical portion is circle, and material path feed inlet passes through bearing and cylinder top
End cap is connected, and the section of horizontal component is gradually from circle to rectangular transition；Material path end is by holder binder brush, and material brush is in circle
Column construction, the rectangular outlet of one side contacts material path, the other side is contacted with the inner wall of cylinder；Scraper is connected in material path, and
Blade is contacted with cylinder inboard wall；The output rotary shaft of motor is connected with material path, and both material path vertical portion, output rotary shaft
Central axis overlap；The top end cap of cylinder is provided with stomata, and the discharge gate is arranged in the bottom of cylinder.
4. lithium ion cell positive according to claim 3 discards slurry recovery system, which is characterized in that the cylinder
Outer wall is provided with the resistance wire for being heated to pivoted arm dryer, and the resistance wire is wrapped up by thermal insulation layer.
5. a kind of lithium ion cell positive discards slurry recovery method, which is characterized in that include the following steps：
（1）The anode generated in the lithium ion battery production process being collected into is discarded into slurry and is put into blender, is added original raw
The solvent added when preparing anode sizing agent when production, is stirred when adding solvent, until the caking phenomenon in discarded slurry disappears
It loses；
（2）Slurry after stirring flows into filter tunnel, further removes foreign matter and impurity；
（3）Slurry after filtering and impurity removing enters pivoted arm dryer and removes moisture and solvent, obtains slurry powder；
（4）Slurry powder after drying enters ball mill and crushes；
（5）Slurry powder after crushing further removes no-bonder, conductive agent, while in pivoted arm dryer into fluidized bed
The pernicious gas of generation is also introduced into fluid bed, and the pernicious gas generated in fluid bed is absorbed by packed absorber；
（6）It is sieved to gained powder, filters out positive mix.
6. lithium ion cell positive according to claim 5 discards slurry recovery method, which is characterized in that the step
（1）Middle solvent is N-Methyl pyrrolidone.
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| CN201610662341.4A CN106207267B (en) | 2016-08-12 | 2016-08-12 | A kind of lithium ion cell positive discards slurry recovery system and recovery method |
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| CN201610662341.4A CN106207267B (en) | 2016-08-12 | 2016-08-12 | A kind of lithium ion cell positive discards slurry recovery system and recovery method |
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| CN106207267B true CN106207267B (en) | 2018-07-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110902701B (en) * | 2019-12-04 | 2021-09-10 | 青海东台吉乃尔锂资源股份有限公司 | Device for washing lithium carbonate |
| CN110734080B (en) * | 2019-12-04 | 2021-09-10 | 青海东台吉乃尔锂资源股份有限公司 | Method for washing lithium carbonate |
| CN115513548A (en) * | 2022-08-31 | 2022-12-23 | 广东邦普循环科技有限公司 | Recovery method and recovery production line of lithium iron phosphate anode waste liquid |
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| CN101212074A (en) * | 2006-12-30 | 2008-07-02 | 上海比亚迪有限公司 | Method for recovering positive pole material of Li-ion battery |
| CN101572329A (en) * | 2008-04-30 | 2009-11-04 | 深圳市比克电池有限公司 | Method for recovering lithium-ion battery cathode materials |
| CN102162034A (en) * | 2011-04-07 | 2011-08-24 | 常州今创博凡能源新材料有限公司 | Process for recovering valuable metals from waste lithium batteries |
| CN102694217A (en) * | 2011-03-22 | 2012-09-26 | 东莞新能源科技有限公司 | Lithium ion batteries cathode material recovery method |
| CN105811041A (en) * | 2016-05-19 | 2016-07-27 | 株洲鼎端装备股份有限公司 | Recycling and disposal system for waste lithium-ion power battery |
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- 2016-08-12 CN CN201610662341.4A patent/CN106207267B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212074A (en) * | 2006-12-30 | 2008-07-02 | 上海比亚迪有限公司 | Method for recovering positive pole material of Li-ion battery |
| CN101572329A (en) * | 2008-04-30 | 2009-11-04 | 深圳市比克电池有限公司 | Method for recovering lithium-ion battery cathode materials |
| CN102694217A (en) * | 2011-03-22 | 2012-09-26 | 东莞新能源科技有限公司 | Lithium ion batteries cathode material recovery method |
| CN102162034A (en) * | 2011-04-07 | 2011-08-24 | 常州今创博凡能源新材料有限公司 | Process for recovering valuable metals from waste lithium batteries |
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