CN219385057U - Lithium ion battery cathode material cladding granulation, carbonization and graphitization device - Google Patents
Lithium ion battery cathode material cladding granulation, carbonization and graphitization device Download PDFInfo
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- CN219385057U CN219385057U CN202320498154.2U CN202320498154U CN219385057U CN 219385057 U CN219385057 U CN 219385057U CN 202320498154 U CN202320498154 U CN 202320498154U CN 219385057 U CN219385057 U CN 219385057U
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- 238000005087 graphitization Methods 0.000 title claims abstract description 52
- 238000005253 cladding Methods 0.000 title claims abstract description 25
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 23
- 239000010406 cathode material Substances 0.000 title claims abstract description 20
- 238000005469 granulation Methods 0.000 title claims abstract description 20
- 230000003179 granulation Effects 0.000 title claims abstract description 20
- 238000003763 carbonization Methods 0.000 title abstract description 45
- 239000000463 material Substances 0.000 claims abstract description 124
- 238000010438 heat treatment Methods 0.000 claims abstract description 99
- 238000001816 cooling Methods 0.000 claims abstract description 71
- 239000011248 coating agent Substances 0.000 claims abstract description 36
- 238000000576 coating method Methods 0.000 claims abstract description 36
- 238000004321 preservation Methods 0.000 claims abstract description 25
- 229910002804 graphite Inorganic materials 0.000 claims description 34
- 239000010439 graphite Substances 0.000 claims description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 33
- 230000005540 biological transmission Effects 0.000 claims description 26
- 238000009413 insulation Methods 0.000 claims description 21
- 238000004140 cleaning Methods 0.000 claims description 12
- 238000010000 carbonizing Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 8
- 239000011819 refractory material Substances 0.000 claims description 7
- 239000011449 brick Substances 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 239000006229 carbon black Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000007773 negative electrode material Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 32
- 238000007599 discharging Methods 0.000 abstract description 22
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000010924 continuous production Methods 0.000 abstract description 5
- 230000010354 integration Effects 0.000 abstract 1
- 238000003756 stirring Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000000126 substance Substances 0.000 description 4
- 239000010405 anode material Substances 0.000 description 3
- 229910021383 artificial graphite Inorganic materials 0.000 description 3
- 239000005539 carbonized material Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011538 cleaning material Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000002801 charged material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
The utility model relates to a lithium ion battery cathode material cladding granulation, carbonization and graphitization device, which comprises a semi-spiral blade cladding heat treatment device, an electric self-heating low-temperature carbonization device and a graphitization device, wherein the semi-spiral blade cladding heat treatment device discharges materials to the electric self-heating low-temperature carbonization device, the electric self-heating low-temperature carbonization device discharges materials to the graphitization device, the graphitization device consists of a plurality of independent graphitization furnaces, the electric self-heating low-temperature carbonization device respectively feeds materials to the plurality of independent graphitization furnaces through a multi-station material distributor, and the multi-station material distributor respectively feeds materials to the different graphitization furnaces in different time periods, so that the graphitization furnaces respectively finish the working contents of charging, heating, heat preservation, cooling and discharging in the same time period. The utility model realizes the integration of three processes of coating granulation, carbonization and graphitization, realizes linkage continuous production operation, and realizes the continuity, automation, low energy consumption, low pollution, high yield and high quality in the production process of the cathode material.
Description
Technical Field
The utility model relates to the technical field of lithium ion battery cathode material production, in particular to a device for continuously coating, granulating, carbonizing and graphitizing a lithium ion battery cathode material.
Background
In the production process of the lithium ion battery cathode material (artificial graphite cathode), the coating granulation is carried out by adopting an intermittent reaction kettle, and the defects of high energy consumption, low efficiency and serious pollution are obvious. The rotary kiln is also tried to be used for continuous production, but the effect is not ideal, the productivity is improved, the power consumption is reduced, but the product quality is also obviously reduced, in the coating granulation process, the rotary kiln is not strongly and uniformly stirred, the coating strength and the coating impregnation property are greatly reduced, the product under the process can only be applied to batteries at lower ends at present, the market adaptability is poor, and the product technology and economy are not competitive.
In the production process of the lithium ion battery cathode material (artificial graphite cathode), the low-temperature carbonization process is widely used at present, and the coated material is carbonized at low temperature (namely, the coated material is heated to 850 ℃ in the low-temperature carbonization process, the temperature of the heated material and volatile matters thereof can be reduced by five points, generally can be reduced to about 1%, and the compaction can be improved by 30%). The two indexes of tap and volatile matters are obviously improved, the latter can improve the charging amount (generally by more than 30%) in the graphitization process, the former can improve the safety in the graphitization process, and the furnace spraying accident is avoided. For both reasons, low temperature carbonization is currently widely used. At present, a carbonization mode of a crucible tunnel kiln is commonly adopted in the industry, namely materials to be carbonized at low temperature are loaded into the crucible, the materials are loaded into the tunnel kiln by a material boat, the temperature of the tunnel kiln is adjusted according to the temperature required by carbonization, and the carbonized materials are naturally cooled along with the material boat and then discharged from the crucible to complete carbonization. The process has high energy consumption, 60% of heat energy is consumed on a material boat and a crucible, the processing cost is high, partial oxidation can be generated when the temperature of materials in a dry pot is raised, the loss of the materials is caused, the specific surface area of the materials is damaged, the product quality is reduced, and the pollution controllability of a kiln which is open is also poor.
In the production process of the lithium ion battery anode material (artificial graphite anode), the graphitization process consumes the most energy, and accounts for more than 60% of the energy consumption for manufacturing the anode material, and more than 60% of the manufacturing cost. At present, the graphitization process adopts an Acheson furnace and a box furnace process, the power consumption of the graphitization process is 7000-11000 KW.h per ton, and a large amount of auxiliary materials such as a crucible, a resistor material, a covering material and the like are also needed. The material generally needs about 72 hours of heating time in the furnace, then naturally cooling to below 100 ℃ and discharging, the cooling time generally needs about 20 days, and the whole manufacturing period generally needs about 30 days. In the graphitization process, the open heating is adopted, so that gas phase substances generated in the heating process can not be recovered, and environmental pollution is caused.
Aiming at a plurality of problems in the preparation process of the lithium ion battery cathode material, the utility model provides a solution of continuous coating granulation, continuous low-temperature carbonization and continuous graphitization.
Disclosure of Invention
The utility model provides a coating granulation, carbonization and graphitization device for a lithium ion battery cathode material, which is formed by serially connecting and combining three process devices of coating granulation, carbonization and graphitization, so that the coating granulation, low-temperature carbonization and graphitization are integrated, and the three process devices are linked for continuous production operation, thereby realizing the continuity, low energy consumption, low pollution, high yield and high quality in the production process of the cathode material.
In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:
the utility model provides a lithium ion battery negative pole material cladding granulation, carbomorphism, graphitization device, includes half helical blade cladding heat treatment device, electricity self-heating low temperature carbomorphism device, graphitization device, half helical blade cladding heat treatment device is to the material discharge of electricity self-heating low temperature carbomorphism device, electricity self-heating low temperature carbomorphism device is to graphitization device discharge, graphitization device comprises a plurality of independent graphitization stoves, electricity self-heating low temperature carbomorphism device is through the pay-off of multistation material distributor to a plurality of independent graphitization stoves respectively, the multistation material distributor pay-off to different graphitization stoves respectively in different periods to make a plurality of graphitization stoves accomplish the work content of different periods of charging, heating, heat preservation, cooling and ejection of compact respectively in same period.
The graphitizing furnace is 5, the multi-station material distributor is a spiral distributor, the spiral distributor is provided with 5 discharge ports which are respectively connected with the feed inlets of the 5 graphitizing furnaces, and the 5 discharge ports of the spiral distributor are respectively discharged by valve control.
The graphitizing furnace comprises a furnace body, an air cooling channel, an air cooling pipeline, a heat exchanger and a fan, wherein the air cooling channel is arranged outside the furnace body, the air cooling channel is connected with the air cooling pipeline in a closed loop manner, the air cooling pipeline is connected with the heat exchanger, and the fan is used for driving cold and hot gas in the air cooling pipeline to circularly flow.
The furnace body is a graphite furnace tube, a heat preservation and insulation layer and a metal shell are wrapped outside the graphite furnace tube, the air cooling channel is arranged in the heat preservation and insulation layer, power supply wiring terminals are arranged at two ends of the graphite furnace tube, and resistance heat is generated after the power is supplied to the material in the graphite furnace tube for heating.
The heat preservation and insulation layer sequentially comprises carbon black filling materials, an aluminum brick heat preservation and insulation masonry layer and heat preservation fibers from inside to outside.
The electric self-heating low-temperature carbonization device comprises a self-heating graphite tube rotary cylinder and a power receiving electrode rod, wherein the inner cylinder of the self-heating graphite tube rotary cylinder is a graphite tube, and two ends of the graphite tube are connected with an electric slip ring and are electrified and heated through the power receiving electrode rod.
The semi-spiral blade cladding heat treatment device comprises a rotary heating transmission device, transmission shafts, self-cleaning blades, a heating device, heat insulation refractory materials and a furnace tank, wherein the self-cleaning blades are two groups of spiral blades which are respectively arranged on the two transmission shafts, the two groups of spiral blades are small semi-circular spiral blades, the two groups of spiral blades are staggered and mutually meshed, the two transmission shafts rotate through gear transmission, one transmission shaft is in transmission connection with the rotary heating transmission device, the self-cleaning blades are arranged in the furnace tank, the heating device is arranged outside the furnace tank, and the heat insulation refractory materials are arranged outside the heating device.
The front end of the semi-spiral blade cladding heat treatment device is provided with a vacuum feeder, and the tail end of the graphitizing device is provided with a rotary material heat cooler.
Compared with the prior art, the utility model has the beneficial effects that:
1) The utility model combines three process devices of coating granulation, carbonization and graphitization in series, so that the coating granulation, low-temperature carbonization and graphitization are integrated, and the three process devices are linked for continuous production operation; the graphitization process sequentially alternates through five furnaces according to the working sequence of charging, heating, heat preservation, cooling by a typhoon, discharging and the like, so that continuous feeding and continuous discharging of graphitized materials of the system are ensured, and continuous operation of the whole process is realized.
2) The coating granulation adopts a half helical blade coating heat treatment device, and adopts a stirring device which is provided with a group of double-shaft half helical blades which are meshed with each other to realize strong stirring on the coating. The half helical blade lift angle on the double shaft can enable the material to axially move, and the displacement of the material can be controlled according to the material temperature rising and coating state, so that the continuous heating and coating of the material are realized. The double-shaft semi-spiral blades are meshed with each other, so that the self-cleaning material stirring and pushing device has a self-cleaning function.
3) The material cooling in the utility model is divided into two parts of forced air cooling of the material in the furnace and water cooling of a cooling device after the material is discharged from the furnace. Part of heat in the furnace is taken away by cold air passing through the furnace body cooling channel, so that the material and the furnace body are cooled. The heat taken away by the wind current can enter a heat energy recovery station for recycling. And then the materials enter a rotary cooler mainly through water cooling, and heat taken away by water and heat taken away by cooling of the furnace body in the cooling process can be recycled in a concentrated manner.
4) Low energy consumption: at present, a carbonization mode of a crucible tunnel kiln is commonly adopted in the industry, namely materials to be carbonized at low temperature are loaded into the crucible, the materials are loaded into the tunnel kiln by a material boat, the temperature of the tunnel kiln is adjusted according to the temperature required by carbonization, and the carbonized materials are naturally cooled along with the material boat and then discharged from the crucible to complete carbonization. The process consumes high energy, and 60% of the heat energy is consumed on the material boat and the crucible. The utility model has no crucible and material boat, so that the utility model saves energy.
5) Low pollution: as the middle charging and discharging link of the whole process is carried out in a relatively airtight reactor, less pollutant leakage is reduced, and pollution is reduced.
6) High yield and high quality: the continuous production has high production efficiency, and the same heating power output can be doubled; as the semi-spiral blades are forcedly stirred in the coating granulation process, the coating granulation has no caking and adhesion and good granularity uniformity.
Drawings
FIG. 1 is a schematic view of the overall structure of the present utility model;
FIG. 2 is a cross-sectional view of a half helical blade coating heat treatment device of the present utility model;
fig. 3 is a top view of the overall structure of the present utility model.
In the figure: the device comprises a 1-vacuum feeder, a 2-semi-spiral blade cladding heat treatment device, a 2-1 furnace tank, a 2-2 self-cleaning blade, a 2-3 transmission shaft, a 2-4 gear, a 2-5 chain wheel, a 2-6 rotary heating transmission device, a 2-7 heating device, a 2-8 heat insulation refractory material, a 3-carbon cladding continuous discharger, a 4-electric self-heating low-temperature carbonization device, a 4-1 power receiving electrode rod, a 4-2 electric slip ring, a 4-3 graphite pipe, a 5-multi-station material distributor, a 6-valve, a 7-graphitization furnace, an 8-graphite pusher, a 9-power supply electrode, a 10-graphite furnace pipe, an 11-air cooling channel, a 12-heat exchanger, a 13-star-shaped sealing discharger, a 14-rotary material heat cooler and a 15-exhaust port.
Detailed Description
The following is a further description of embodiments of the utility model, taken in conjunction with the accompanying drawings:
the device comprises a semi-spiral blade cladding heat treatment device 2, an electric self-heating low-temperature carbonization device 4 and a graphitization device, wherein the semi-spiral blade cladding heat treatment device 2 discharges materials to the electric self-heating low-temperature carbonization device 4, the electric self-heating low-temperature carbonization device 4 discharges materials to the graphitization device, the graphitization device consists of a plurality of independent graphitization furnaces 7, the electric self-heating low-temperature carbonization device 4 respectively feeds materials to the plurality of independent graphitization furnaces 7 through a multi-station material distributor 5, and the multi-station material distributor 5 respectively feeds materials to the different graphitization furnaces 7 in different time periods, so that the plurality of graphitization furnaces 7 respectively complete the working contents of different time periods of charging, heating, heat preservation, cooling and discharging in the same time period.
The number of the graphitizing furnaces 7 is 5, the multi-station material distributor 5 is a spiral distributor, the spiral distributor is provided with 5 discharge ports which are respectively connected with the feed inlets of the 5 graphitizing furnaces 7, and the 5 discharge ports of the spiral distributor are respectively discharged by valve control.
The graphitizing furnace 7 comprises a furnace body, an air cooling channel 11, an air cooling pipeline, a heat exchanger 12 (a gas-water heat exchange cooling system) and a fan, wherein the air cooling channel 11 is arranged outside the furnace body, the air cooling channel 11 is connected with the air cooling pipeline in a closed loop manner, the air cooling pipeline is connected with the heat exchanger 12, and the fan is used for driving cold and hot inert gas in the air cooling pipeline to circularly flow.
The furnace body is a graphite furnace tube 10, a heat preservation and insulation layer and a metal shell are wrapped outside the graphite furnace tube 10, an air cooling channel 11 is arranged in the heat preservation and insulation layer, power supply wiring terminals are arranged at two ends of the graphite furnace tube 10 and are connected with power supply electrodes 9, and resistance heat is generated after the power supply is conducted to heat materials in the furnace tube.
The heat preservation and insulation layer sequentially comprises carbon black filling materials, an aluminum brick heat preservation and insulation masonry layer and heat preservation fibers from inside to outside.
The electric self-heating low-temperature carbonization device 4 comprises a self-heating graphite tube rotary cylinder and a power receiving electrode rod 4-1, wherein the inner cylinder of the self-heating graphite tube rotary cylinder is a graphite tube 4-3, and two ends of the graphite tube 4-3 are connected with an electric slip ring 4-2 and are electrified and heated through the power receiving electrode rod 4-1.
The semi-spiral blade cladding heat treatment device 2 comprises a rotary heating transmission device 2-6, transmission shafts 2-3, self-cleaning blades 2-2, a heating device 2-7, heat insulation refractory materials 2-8 and a furnace tank 2-1, wherein the self-cleaning blades 2-2 are two groups of spiral blades which are respectively arranged on the two transmission shafts 2-3, the two groups of spiral blades are small semi-circular spiral blades, the two groups of spiral blades are meshed with each other in a staggered manner, the two transmission shafts 2-3 are in transmission rotation through a gear 2-4, one transmission shaft 2-3 is in transmission connection with the rotary heating transmission device through a sprocket 2-5, the self-cleaning blades 2-2 are arranged in the furnace tank 2-1, the heating device 2-7 is arranged outside the furnace tank 2-1, and the heat insulation refractory materials 2-8 are arranged outside the heating device 2-7.
The front end of the semi-spiral blade cladding heat treatment device 2 is provided with a vacuum feeder 1, and the tail end of the graphitizing device is provided with a rotary material heat cooler 14.
A production method of a lithium ion battery cathode material coating granulation, carbonization and graphitization device comprises the following technical processes:
1) The materials enter the half-spiral blade cladding heat treatment device 2, and move to the discharge port while being heated in the stirring process of the half-spiral blade, so that continuous heating cladding of the materials is realized, and the discharge temperature is 350-450 ℃.
2) The material after being heated and coated enters an electric self-heating low-temperature carbonization device 4, and the low-temperature carbonization temperature is 350-850 ℃.
3) The low-temperature carbonized materials are sequentially distributed to 5 graphitizing furnaces 7 through the multi-station material distributor 5, and in the continuous distribution process of the same period of the multi-station material distributor 5, the 5 graphitizing furnaces 7 sequentially complete the work contents of charging, heating, heat preservation, cooling and discharging, so that the continuous operation of feeding and discharging of the 5 graphitizing furnaces 7 is realized.
The graphitizing furnace group consists of five independent long tubular furnaces which are arranged at a certain inclination angle. The upper end of the furnace group is connected with a multi-station material distributor 5, and materials continuously discharged by the electric self-heating low-temperature carbonization device 4 enter the multi-station material distributor 5 and can be distributed to five furnaces respectively through a feed valve 6. The feeding valve 6 can adopt a star-shaped sealing discharger, and a certain storage space is arranged above the star-shaped sealing discharger. The working sequence of the five furnaces is one furnace charging, one heating, one heat preservation, one wind cooling and one discharging. The five furnaces are charged, heated, insulated, air-cooled and discharged for equal time, and the times are alternated in sequence, so that the graphitization discharge amount is equal to the charging amount of the low-temperature carbonization rotary kiln to the furnace assembly, and the continuous discharge of graphitization materials of the system is ensured.
The inclined angle of the graphitizing furnace group is determined by the flowability of the charged materials in the graphitizing furnace 7, and at least 20% of a material-free area is reserved above the section of the furnace body after the charging, so that the gas-phase materials are discharged after the materials are heated. The end of the furnace body feeding end is provided with a spiral feeding graphite pusher 8.
And discharging and collecting the gas phase substances generated after the materials are heated through an exhaust device.
Each furnace is provided with an air cooling system, the materials are subjected to forced air cooling after heat preservation in the furnace is finished, and forced ventilation is carried out on the furnace body and the materials through an air cooling channel 11 at the bottom of the furnace body to cool the furnace body.
4) The heating temperature of the graphitizing furnaces 7 is 2600-3000 ℃, the charging, heating, heat preservation, cooling and discharging time of each graphitizing furnace are 20-24 hours, and the discharging temperature after cooling is 1000-1100 ℃.
5) And discharging the graphitizing furnace 7, and cooling the discharged material to below 100 ℃ in a rotary material heat cooler 14 to finish discharging.
The heat taken away by the material in the furnace cooling process in the graphitization furnace 7 and the cooling process of the rotary material heat cooler 14 is recycled. The heat recovery rate is more than 20%.
The semi-spiral blade coating heat treatment device 2 (lithium ion battery cathode material continuous coating granulation device) is a long continuous coating kettle. The process comprises adopting a stirring device with a group of double-shaft semi-spiral blades meshed with each other to realize strong stirring of the coating. The half helical blade lift angle on the double shaft can enable the material to axially move, and the displacement of the material can be controlled according to the material temperature rising and coating state, so that the continuous heating and coating of the material are realized. A feeding port and an exhaust device are arranged above one end of the long continuous coating kettle, a discharging port is arranged below the other end of the long continuous coating kettle, and a heating device is arranged below the coating kettle. The materials entering the kettle from the material feeding port are continuously displaced to the material discharging port in the stirring and heating process, and the materials are coated and discharged according to the set technological parameters. And gas phase substances generated in the process of coating and heating the materials in the kettle are discharged from the exhaust port and enter the gas collecting and treating system. The double-shaft semi-spiral blades are meshed with each other, so that the self-cleaning material stirring and pushing device has a self-cleaning function. (see CN202210726062.5 for details, a method for continuously coating and granulating anode material of lithium ion battery and self-heating device)
The electric self-heating low-temperature carbonization device 4 (continuous low-temperature carbonization device for lithium ion battery cathode materials) consists of a rotary kiln outer shell, a rotary kiln heat insulation material layer, a graphite tube resistor inner cylinder, a power supply device and other parts. The continuous low-temperature carbonization device is a graphite tube resistor inner cylinder, a rotary kiln heat insulation material layer and a rotary kiln outer cylinder body sequentially from inside to outside. The power supply device supplies power to the graphite resistor tube, and resistance heat generated after the power supply device is electrified heats materials, so that the temperature of the materials is controlled within 850 ℃. The rotary kiln is driven to rotate by an external driving device. (see CN202210427695.6 for details, an internal heating type continuous rotary heating process and apparatus)
The material feeding port of the electric self-heating low-temperature carbonization device 4 is in butt joint with the material discharging port of the semi-spiral blade cladding heat treatment device 2, so that the materials subjected to cladding and granulating are finished, and the materials are directly distributed to the low-temperature carbonization device through a cladding and granulating outlet. The feeding temperature of the materials entering the low-temperature carbonization device can be adjusted within the range of 350-450 ℃ according to the requirements of material coating granulation. The electric self-heating low-temperature carbonization device 4 is a rotary heating kiln which is obliquely arranged, and the inclination angle is determined according to the flowing state and the heating state of the materials in the rotary body. The graphite tube 4-4 resistor inner cylinder generates resistance heat under the condition of power supply, and the materials entering the continuous low-temperature carbonization kiln body are further heated to 850 ℃. The material entering the electric self-heating low-temperature carbonization device 4 is further heated under the action of resistance heat, the material moves downwards along the inner pipe wall of the low-temperature carbonization device, and the temperature of the material in the device increases stepwise from top to bottom due to the continuous addition of the material and the difference of the heating time of the material in the device.
The combined furnace body of the graphitizing furnace 7 consists of five independent long tubular graphitizing heating furnaces which are obliquely arranged, the furnace body is about 30m long, the section of the furnace body is circular, graphite furnace tubes (the thickness is 100 mm) are sequentially arranged from inside to outside, carbon black is filled (the thickness is 300 mm), a high-alumina brick heat insulation masonry layer (the thickness is 650 mm), heat insulation fibers (the thickness is 180 mm), and a metal shell (the thickness is 20 mm). Connecting terminals at two ends of the graphite furnace tube are connected with the power supply electrode 9, and after power supply is started, resistance heat is generated by the graphite furnace tube to heat materials in the tube. The carbon ink filling material outside the graphite furnace tube has the functions of insulation and heat insulation, and can ensure that the heating current is not leaked and prevent the heat from diffusing and losing outwards when the electric power is transmitted to heat. The high-alumina brick heat-insulating and heat-preserving masonry layer is a reinforcing protection layer for preventing heat loss, and an air cooling channel 11 is arranged in the high-alumina brick heat-insulating and heat-preserving masonry layer at the bottom of the furnace body and is used for forced air cooling. An exhaust port 15 is arranged above the furnace body, and gas phase substances generated after the temperature of the materials is raised are discharged through an exhaust channel and enter a tail gas collector for collection and treatment. The working sequence of the combined furnace body is as follows: when the charging of the first furnace is started, the third furnace is heated and enters a heat preservation state, at the moment, the charged second furnace starts to be heated and powered, ding Lu materials are subjected to heat preservation and forced air cooling for 48 hours, and the temperature of the materials is reduced to below 1100 ℃. The discharge valve of Ding Lu is opened and the material is discharged to the cooling system through the discharge assembly. At the moment, the temperature keeping of the furnace is finished for 24 hours, and the forced cooling device is started to cool the materials. Charging, heating, heat preservation, air cooling and discharging for each furnace are all 20-24 hours, and continuous operation of charging, heating, heat preservation, air cooling and discharging is realized all the time. And when the forced cooling system cools during discharging, the discharged graphitizing furnace also maintains an air cooling state until discharging is finished. Therefore, the operating pressure of the discharging cooling system can be reduced, and the temperature requirement of the furnace temperature adaptation device after the discharged furnace body materials are discharged can be guaranteed.
The feeding component is a spiral distributor with five distributing outlets, materials received by the spiral distributor can be respectively fed to five groups of furnace bodies, five groups of valves control the feeding ports of five groups of furnaces, and the valves are opened to feed into the furnaces. The spiral distributor can also prevent the high temperature of the heating furnace from channeling upwards, so that the safety of feeding and a system is ensured.
The material cooling is divided into two parts, namely forced air cooling of the material in the furnace and cooling after the material is discharged from the furnace. The forced air cooling of the materials in the furnace is composed of a furnace body air supply and cooling channel 11, a control valve and a fan. Part of heat in the furnace is taken away by cold air passing through the furnace body air cooling channel 11, so that the materials and the furnace body are cooled. The heat carried away by the wind flow can be recycled by entering a heat energy recovery station through the heat exchanger 12. The materials in the lower row enter a cooling device (a rotary material heat cooler 14), the device takes water cooling as the main part, and the heat taken away by water and the heat taken away by furnace body cooling in the cooling process can be recycled in a concentrated way.
Claims (8)
1. The utility model provides a lithium ion battery negative pole material cladding granulation, carbomorphism, graphitization device, its characterized in that includes half helical blade cladding heat treatment device, electricity self-heating low temperature carbomorphism device, graphitization device, half helical blade cladding heat treatment device is to electricity self-heating low temperature carbomorphism device row material, electricity self-heating low temperature carbomorphism device is to graphitization device row material, graphitization device comprises a plurality of independent graphitization stoves, electricity self-heating low temperature carbomorphism device is through the pay-off of multistation material distributor to a plurality of independent graphitization stoves respectively, the multistation material distributor pay-off to different graphitization stoves respectively in different periods to make a plurality of graphitization stoves accomplish respectively the loading, heat, keep warm, the work content of different periods of cooling and ejection of compact in same period.
2. The device for granulating, carbonizing and graphitizing the lithium ion battery cathode material according to claim 1, wherein the number of the graphitizing furnaces is 5, the multi-station material distributor is a spiral distributor, the spiral distributor is provided with 5 discharge ports which are respectively connected with the feed inlets of the 5 graphitizing furnaces, and the 5 discharge ports of the spiral distributor are respectively discharged by valve control.
3. The device for granulating, carbonizing and graphitizing the lithium ion battery cathode material according to claim 1 or 2, wherein the graphitizing furnace comprises a furnace body, an air cooling channel, an air cooling pipeline, a heat exchanger and a fan, the air cooling channel is arranged outside the furnace body, the air cooling channel is connected with the air cooling pipeline in a closed loop manner, the air cooling pipeline is connected with the heat exchanger, and the fan is used for driving cold and hot air in the air cooling pipeline to circularly flow.
4. The device for granulating, carbonizing and graphitizing the lithium ion battery cathode material cladding according to claim 3, wherein the furnace body is a graphite furnace tube, the graphite furnace tube is externally wrapped with a heat-preserving heat-insulating layer and a metal shell, the air cooling channel is arranged in the heat-preserving heat-insulating layer, two ends of the graphite furnace tube are provided with power supply wiring terminals, and resistance heat is generated to heat materials in the tube after the power is supplied.
5. The device for granulating, carbonizing and graphitizing the lithium ion battery cathode material according to claim 4, wherein the heat preservation and heat insulation layer sequentially comprises carbon black filling materials, high-alumina brick heat preservation and heat preservation masonry layers and heat insulation fibers from inside to outside.
6. The device for granulating, carbonizing and graphitizing the lithium ion battery cathode material according to claim 1, wherein the electric self-heating low-temperature carbonizing device comprises a self-heating graphite tube rotary cylinder and a power receiving electrode rod, the inner cylinder of the self-heating graphite tube rotary cylinder is a graphite tube, and two ends of the graphite tube are connected with electric slip rings and are electrified and heated through the power receiving electrode rod.
7. The device for granulating, carbonizing and graphitizing the lithium ion battery cathode material coating according to claim 1, wherein the semi-spiral blade coating heat treatment device comprises a rotary heating transmission device, transmission shafts, self-cleaning blades, a heating device, heat insulation refractory materials and a furnace tank, the self-cleaning blades are two groups of spiral blades respectively arranged on the two transmission shafts, the two groups of spiral blades are small semicircular spiral blades, the two groups of spiral blades are meshed with each other in a staggered manner, the two transmission shafts rotate through gear transmission, one transmission shaft is in transmission connection with the rotary heating transmission device, the self-cleaning blades are arranged in the furnace tank, the heating device is arranged outside the furnace tank, and the heat insulation refractory materials are arranged outside the heating device.
8. The device for granulating, carbonizing and graphitizing the negative electrode material of the lithium ion battery according to claim 1, wherein a vacuum feeder is arranged at the front end of the half spiral blade coating heat treatment device, and a rotary material heat cooler is arranged at the tail end of the graphitizing device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320498154.2U CN219385057U (en) | 2023-03-15 | 2023-03-15 | Lithium ion battery cathode material cladding granulation, carbonization and graphitization device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320498154.2U CN219385057U (en) | 2023-03-15 | 2023-03-15 | Lithium ion battery cathode material cladding granulation, carbonization and graphitization device |
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| CN219385057U true CN219385057U (en) | 2023-07-21 |
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| CN202320498154.2U Active CN219385057U (en) | 2023-03-15 | 2023-03-15 | Lithium ion battery cathode material cladding granulation, carbonization and graphitization device |
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| Country | Link |
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| CN (1) | CN219385057U (en) |
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Effective date of registration: 20240411 Address after: No. 10, Zhenzhu Lane, Shahekou District, Dalian City, Liaoning Province, 116000, China, 4-4-1 Patentee after: Liu Jian Country or region after: China Address before: No. 805, block C, Wanxi city square, Tiedong District, Anshan City, Liaoning Province, 114000 Patentee before: Meng Xiangan Country or region before: China |