CN112378177A - Washing system, processing system and processing technology of lithium battery ternary material - Google Patents
Washing system, processing system and processing technology of lithium battery ternary material Download PDFInfo
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- CN112378177A CN112378177A CN202011123713.9A CN202011123713A CN112378177A CN 112378177 A CN112378177 A CN 112378177A CN 202011123713 A CN202011123713 A CN 202011123713A CN 112378177 A CN112378177 A CN 112378177A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/14—Drying solid materials or objects by processes not involving the application of heat by applying pressure, e.g. wringing; by brushing; by wiping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/102—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration with means for agitating the liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
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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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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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 invention discloses a washing system, a processing system and a processing technology of a lithium battery ternary material, which comprise a cache bin, a metering bin, a stirring kettle, a filter press, a conveyor unit and a drying unit which are connected in sequence; powder materials are stored in the cache bin; the conveyor set comprises a first-stage conveyor connected with the output end of the filter press and a second-stage conveyor connected with the first-stage conveyor, and the first-stage conveyor comprises two or more than two conveyors arranged side by side.
Description
Technical Field
The invention relates to the technical field of powder processing of a lithium battery ternary material, in particular to a washing system, a processing system and a processing technology of the lithium battery ternary material.
Background
With the rapid development of new energy industries, the requirements on the technical performance of lithium ion cathode materials are higher and higher. The high-nickel ternary lithium ion battery anode material has the advantages of high cycle stability, high reversible specific capacity, high energy density, high voltage platform, high tap density, stable electrochemistry, good low-temperature performance, suitability for all-weather air temperature, relatively low price and the like, and is one of the most popular materials in the current commercial anode material research.
However, the nickel content is high, which causes the problem that the ternary battery has poor safety and serious gas generation of the battery core, so how to reduce the alkaline impurities on the surface of the material and improve the performance of the material has important significance.
The water washing is an effective method for reducing the residual alkali on the surface of the anode material, has obvious effect on reducing the carbon content on the surface of the material, can reduce the pH value of the material, and has few side reactions on the surface of the material after washing treatment. In the prior art, the water washing process is not uniform in water washing, the drying effect is poor, and the performance of the washed material is reduced; in addition, the anode material needs to be subjected to surface coating and then packaged for storage after being treated, the anode material subjected to surface coating is isolated from the outside, the surface form is stable, and the commonly used surface coating methods include wet coating and dry coating, wherein the wet coating can completely permeate into powder particles, and the coating effect is better. However, because the solid content requirements of the water washing process and the wet coating process are different, the prior art often adopts different systems to perform the operation of the two processes, thereby causing excessive processing equipment and larger requirements on the area of a workshop; secondly, the material adopts the conveyer to carry between adjacent equipment usually, and often leaves the certain distance between the output of discharge gate and conveyer, because lithium cell cathode material is powdered material, has a small amount of materials to move to the output under the inertia effect when the material is carried to the discharge gate, and powdered material leaks between the bearing clearance easily, causes environmental pollution.
Disclosure of Invention
The invention provides a washing system for a ternary lithium battery material, which is used for solving the technical problems that in the prior art, the performance of a washed material is reduced due to the fact that a lithium ion battery anode material is not washed uniformly and has a poor drying effect.
The invention also provides a processing system suitable for the lithium battery ternary material, and the processing system is used for solving the technical problem that in the prior art, two different systems are required to be used for water washing and wet coating processing, so that the number of processing equipment is too large.
The invention also provides a processing technology of the lithium battery ternary material, which is used for carrying out washing treatment with high drying rate and wet coating treatment with high coating effect on the powder material.
The invention provides a washing system for a lithium battery ternary material, which comprises a cache bin, a metering bin, a stirring kettle, a filter press, a conveyor unit and a drying unit which are connected in sequence; powder materials are stored in the cache bin; the conveyor set comprises a first-stage conveyor connected with the output end of the filter press and a second-stage conveyor connected with the first-stage conveyor, and the first-stage conveyor comprises two or more than two conveyors arranged side by side.
Preferably, the metering bin is an weighted metering bin.
Furthermore, a precise screw feeder is also arranged above the metering bin, and comprises a cylinder, a conveying motor fixed at one axial end of the cylinder, and a conveying shaft in transmission connection with the conveying motor; the conveying shaft is rotatably connected with the barrel, a spiral blade is arranged on the conveying shaft, a feeding hole is formed above the barrel, and a discharging hole is formed below the barrel; the spiral blade comprises a conveying blade positioned between the feeding hole and the discharging hole and a leakage-proof blade positioned between the discharging hole and the output end of the conveying shaft, the rotating direction of the conveying blade is the same as the conveying direction of the conveying shaft, and the rotating direction of the leakage-proof blade is opposite to the conveying direction of the conveying shaft.
Further, the pitch of the conveying blades gradually increases along the conveying direction.
Further, the conveying blades close to the discharge port are of a double-channel helical blade structure, and the screw pitches of the two helical blades are the same and gradually increase along the conveying direction.
Preferably, the dryer group comprises one or more dryers arranged side by side.
Furthermore, the output end of the drying unit is also connected with a cooling machine.
The invention also provides a processing system suitable for the ternary lithium battery material, which comprises the powder washing system; still be equipped with the three-way valve between stirred tank and the pressure filter, the three-way valve contains input, first output and second output, stirred tank's output is connected to the input, the input of pressure filter is connected to first output, the input of drying unit is connected through bypass branch pipe to the second output.
The invention also provides a processing technology of the lithium battery ternary material, which adopts the powder processing system suitable for the water washing and wet coating technology and mainly comprises the following steps:
s1: and the powder material is quantitatively discharged into a metering bin from the buffer material, and the metering bin discharges the powder material to the stirring kettle according to a certain metering.
S2: the method comprises the following steps of pulping and washing materials in a stirring kettle or coating the materials by a wet method to form powder cakes, wherein when the washing process is adopted, the water temperature in the stirring kettle is 5-15 ℃, the solid content of the powder cakes after washing is 30-50%, and when the coating process is adopted, the water temperature in the stirring kettle is 70-85 ℃, and the solid content after coating is 50-70%.
S3: when the water washing process is adopted, the first output end is opened, the second output end is closed, the powder cake in the S2 is conveyed to a filter press for primary drying, and the water content of the powder cake is reduced to be below 7%; when the wet coating process is adopted, the first output end is closed, and the second output end is opened.
S4: and (4) discharging the pressed powder in the S3 into a drying unit for drying, wherein the water content of the dried material is less than 1000 ppm.
Preferably, the time for quantitatively conveying the materials from the metering bin to the stirring kettle in the S1 is less than 5 min.
Preferably, the filter pressing time of the filter press in the S3 is 20-30 min.
Preferably, the drying time of the drying unit in S4 is 2-3 h.
Preferably, the stirring time of the powder material in the S2 in the stirring kettle is 25-35 min.
The invention has the beneficial effects that:
(1) the washed material is dried by adopting a two-stage drying mode of a filter press and a drying unit, the water content of the dried material can be reduced to be below 1000ppm, and the material can be completely recovered to be in a powder structure; meanwhile, the conveyor set adopts a two-stage conveying mode to firstly distribute the materials in the filter press to the first-stage conveyor and then gather the materials to the second-stage conveyor, so that the stable and ordered conveying of the materials is facilitated.
(2) According to the invention, the metering bin adopts an weight-increasing metering mode, when the metering bin is full of single processing amount, the material is poured into the stirring kettle at one time, so that the feeding time is reduced as much as possible, the contact time of the material and air is reduced, and the surface structure of the material is prevented from changing.
(3) According to the invention, the three-way valve is arranged between the stirring kettle and the filter press, and the bypass pipeline is arranged to directly connect the stirring kettle and the dryer, so that when wet coating operation is required, the bypass pipeline in the three-way valve can be opened, and the pipeline connected with the filter press is closed, thereby realizing the effect of performing two process operations through one system, greatly reducing the equipment cost and reducing the workshop area.
(4) According to the powder processing technology, the water washing technology can be used for fully washing the materials, the washed materials can be dried until the water content is lower than 1000ppm, the wet coating technology can be used for completely coating the powder materials, and the surface shape of the coated powder is more stable.
(5) The precise screw feeder is arranged above the metering bin, and the reversely rotating blades are arranged between the discharge port in the cylinder and the output end of the conveying shaft and used for inhibiting the materials from moving to the output end, preventing the materials from leaking from the shaft end and avoiding environmental pollution and material waste.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural diagram of a water washing system for a lithium battery ternary material according to the present invention;
FIG. 2 is a schematic diagram of a powder processing system suitable for water washing and wet coating processes according to the present invention;
FIG. 3 is an enlarged view taken at a in FIG. 2;
fig. 4 is a flow chart of a process for processing a lithium battery ternary material according to the present invention;
FIG. 5 is a front view of a precision screw feeder according to the present invention;
FIG. 6 is a front view of a precision screw feeder according to the present invention;
FIG. 7 is a front view of a precision screw feeder according to the present invention.
In the figure, 1, a buffer storage bin, 2, a metering bin, 3, a stirring kettle, 4, a filter press, 5, a first-level conveyor, 6, a second-level conveyor, 7, a drying unit, 8, a three-way valve, 801, an input end, 802, a first output end, 803, a second output end, 9, a diaphragm pump, 10, a bypass branch pipe, 11, a cooler, 12, an ultrasonic washing device, 13, a precision screw feeder, 131, a cylinder body, 132, a conveying motor, 133, a conveying shaft, 134, a feeding port, 135, a discharging port, 136, a spiral blade, 13601, a conveying blade, 13602, a leakage-proof blade, 137, a bearing set, 138, a double-channel spiral blade structure, 139 and a discharging hopper.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1, the washing system for the lithium battery ternary material comprises a cache bin 1, a metering bin 2, a stirring kettle 3, a filter press 4, a conveyor unit and a drying unit 7 which are connected in sequence; powder materials are stored in the cache bin 1; the conveyor set comprises a first-level conveyor 5 connected with the output end of the filter press 4 and a second-level conveyor 6 connected with the first-level conveyor 5, and the first-level conveyor 5 comprises two or more than two conveyors arranged side by side.
The lithium battery anode material should be in a powder state in a use state, and in order to ensure a use effect, the material should be dried as much as possible after being washed by water, and a washing system in the prior art has a poor drying effect, so that the material amount of single washing is less, and the work efficiency is lower. According to the invention, the materials are finely dried and finely conveyed by adopting a two-stage drying and flow-dividing conveying mode, so that the drying effect is greatly improved, and the material washing amount of a single time can be improved.
The method comprises the steps that materials to be washed are prepared in a cache bin 1, the materials are conveyed to a metering bin 2 from the cache bin 1 through a precise spiral feeder 13, the metering bin 2 weighs the materials according to a formula, the weighed materials are discharged into a stirring kettle 3, the materials enter the stirring kettle 3 to be washed with slurry, the slurry after washing is pumped into a filter press 4 through a diaphragm pump 9, primary drying is conducted on the slurry, the filter press 4 is preferably a full-automatic vertical filter press 4, two or more output ends can be arranged on the full-automatic vertical filter press 4, each output end is connected with a vibrating conveyor respectively, the materials in the full-automatic vertical filter press 4 are distributed to the vibrating conveyors, a primary conveyor 5 is formed, then the materials are converged to a secondary conveyor 6 and conveyed to a drying unit 7 through the secondary conveyor 6, and secondary drying is conducted in the drying unit 7. One-level conveyor 5 shunts the material behind the elementary compression to each jigging conveyer, avoids the material to block up, makes the material steadily carry, converges the material to second grade conveyor 6 afterwards again, makes the material concentrate and mixes, and drying unit 7 can comprise one or more desiccators that set up side by side, and the desiccator is preferred to be with meticulous desiccator, and second grade conveyor 6 shunts to each drying unit 7 after mixing the material once more, can improve drying efficiency like this.
Preferably, the weighing bin 2 is an weighted weighing bin, for example, a "high-precision weighing and feeding mechanism" in a patent previously applied by the applicant can be used, and the weighing bin assembly in patent No. CN201921437893.0 is provided, when the weighing hopper is full of one-time feeding amount, the connecting rod assembly controls the bottom plate of the weighing hopper to be opened, the material is fed into the cache bin 1 at one time, the feeding speed of the material is high, and the time of the material contacting with water in the stirring kettle 3 is accurately controlled by controlling the time of the material entering the cache bin 1 from the weighing bin 2.
The temperature of the material discharged from the drying unit 7 can reach 120-150 ℃, the material cannot be directly bagged and needs to be cooled for a long time. The cooling machine 11 is preferably a horizontal ribbon cooling machine 11.
In order to further improve the alkali removal effect, an ultrasonic water washing device 12 can be further arranged between the stirring kettle 3 and the filter press 4, the slurry is further washed by adopting an ultrasonic vibration mode, the ultrasonic water washing device 12 is the prior art, and the applicant has already applied for related patents, and detailed description of the structure is omitted here.
In the further design of the present invention, in order to improve the metering accuracy of the metering bin 2 and avoid material leakage, the present invention further provides a precision screw feeder 13 above the metering bin 2, i.e. at the input end of the metering bin 2, wherein the precision screw feeder 13 comprises a cylinder 131, a conveying motor 132 fixed at one axial end of the cylinder 131, and a conveying shaft 133 in transmission connection with the conveying motor 132; the conveying shaft 133 is rotatably connected with the cylinder 131, the conveying shaft 133 is provided with a helical blade 136, a feeding hole 134 is arranged above the cylinder 131, and a discharging hole 135 is arranged below the cylinder 131; the feed inlet 134 is communicated with the cache bin 1, and the discharge outlet 135 is communicated with the metering bin 2; the screw blade 136 includes a feeding blade 13601 between the feed port 134 and the discharge port 135 and a leakage preventing blade 13602 between the discharge port 135 and the output end of the feeding shaft 133, the feeding blade 13601 is rotated in the same direction as the feeding direction of the feeding shaft 133, and the leakage preventing blade 13602 is rotated in the opposite direction to the feeding direction of the feeding shaft 133.
As shown in fig. 5, the conveying motor 132 is fixed at the left end of the cylinder 131, the left end of the cylinder 131 is an input end, the right end of the cylinder 131 is an output end, the feed port 134 is arranged near the input end of the cylinder 131, the discharge port 135 is arranged near the output end of the cylinder 131, the material enters the cylinder 131 from the feed port 134 and fills the pitch of the helical blade 136, when the conveying shaft 133 rotates, the material is conveyed forward along the helical direction of the helical blade 136 and leaks out at the discharge port 135 due to the action of gravity, the helical direction of the leakage-preventing blade 13602 is opposite to the moving direction of the material, so the material is not conveyed to the output end of the cylinder 131 continuously, and the material is. Preferably, the input end and the output end of the conveying shaft 133 are rotatably connected with the cylinder 131 through a bearing set 137. The rotary connection of the two parts by the bearing connection and the filling of the sealing filler between the radial gaps are conventional designs for those skilled in the art, and the present invention does not modify the structure and function thereof, and therefore, detailed description thereof is omitted here.
Further, as shown in fig. 6, the pitch of the conveying blade 13601 is gradually increased along the conveying direction, that is, the pitch of the conveying blade 13601 is gradually increased from the feeding port 134 to the discharging port 135, so as to avoid excessive friction and material blockage caused by the material filling the cylinder 131 on the one hand, and on the other hand, the larger the pitch, the smaller the feeding amount in each pitch on the conveying shaft 133, the more accurate the metering is. In addition, in a further design, the conveying blade 13601 near the discharge port 135 is a double-channel helical blade structure 138, the pitch of the two channels of helical blades 136 is the same, and the two channels of helical blades are gradually increased along the conveying direction, as shown in fig. 7, the conveying blade 13601 of the double-channel helical blade structure 138 is arranged at a position which is one third of the axial length of the conveying blade 13601 away from the discharge port 135, at this time, the feeding amount in each pitch can be halved, and the feeding amount in each pitch on the conveying shaft 133 can be further reduced, so that the metering precision is further enhanced.
Preferably, the discharge port 135 is connected with a discharge hopper 139, and the diameter of the discharge hopper 139 gradually increases from the inlet end to the outlet end, so as to avoid material blockage.
As shown in fig. 2 and 3, a processing system suitable for a ternary lithium battery material is suitable for both a water washing process and a wet coating process, and comprises the water washing system for the ternary lithium battery material; a three-way valve 8 is further arranged between the stirred tank 3 and the filter press 4, the three-way valve 8 comprises an input end 801, a first output end 802 and a second output end 803, the input end 801 is connected with the output end of the stirred tank 3, the first output end 802 is connected with the input end 801 of the filter press 4, and the second output end 803 is connected with the input end 801 of the drying unit 7 through a bypass branch pipe 10.
When the water washing process is used, the materials need to be dried in two stages, the first output end 802 is opened, the second output end 803 is closed, and the materials enter the filter press 4 from the stirring kettle 3 for primary drying; when the wet coating process is used, the material is dried only once, the first output end 802 is closed, the second output end 803 is opened, the coating agent is added into the stirring kettle 3 to coat the material, and the material discharged from the stirring kettle 3 directly enters the dryer.
As shown in fig. 4, the present invention further provides a processing process of a ternary lithium battery material, wherein the processing system suitable for the ternary lithium battery material is adopted in the processing process, and the processing process mainly includes the following steps:
s1: the powder material is discharged into the metering bin 2 from the buffer material in a fixed amount, and the metering bin 2 discharges the powder material to the stirring kettle 3 according to a certain amount. The time for quantitatively conveying the materials from the metering bin 2 to the stirring kettle 3 is preferably controlled to be less than 5min, so that the time for the materials to contact with water in the stirring kettle 3 is indirectly controlled.
S2: the materials are subjected to slurry washing or wet coating in the stirring kettle 3 to form a powder cake, when a washing process is adopted, the water temperature in the stirring kettle 3 is 5-15 ℃, the solid content of the powder cake after washing is 30-50%, and when a wet coating process is adopted, the water temperature in the stirring kettle 3 is 70-85 ℃, and the solid content after coating is 50-70%. The preferable stirring time of the powder material in the stirring kettle 3 is 25-35 min.
S3: when the water washing process is adopted, the first output end 802 is opened, the second output end 803 is closed, the powder cake in the S2 is conveyed to the filter press 4 for primary drying, the water content of the powder cake is reduced to be below 7%, and the filter pressing time is 20-30 min; when the wet coating process is used, the first output end 802 is closed, the second output end 803 is opened, and the cake material in the step S2 enters the bypass branch pipe 10.
S4: and (5) discharging the pressed powder in the S3 into a drying unit 7 for drying, wherein the water content of the dried material is less than 1000 ppm. The drying time of the drying unit 7 is 2-3 h.
In this specification, the schematic representations of the terms are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The utility model provides a washing system of lithium electricity ternary material which characterized in that: comprises a buffer storage bin (1), a metering bin (2), a stirring kettle (3), a filter press (4), a conveyor unit and a drying unit (7) which are connected in sequence; powder materials are stored in the cache bin (1);
the conveyor set comprises a primary conveyor (5) connected with the output end of the filter press (4) and a secondary conveyor (6) connected with the primary conveyor (5), and the primary conveyor (5) comprises two or more than two conveyors arranged side by side.
2. The water washing system for the ternary lithium battery material according to claim 1, wherein: the metering bin (2) is an weight-increasing metering bin.
3. The water washing system for the ternary lithium battery material according to claim 1, wherein: a precise screw feeder (13) is further arranged above the metering bin (2), and the precise screw feeder (13) comprises a cylinder body (131), a conveying motor (132) fixed at one axial end of the cylinder body (131), and a conveying shaft (133) in transmission connection with the conveying motor (132); the conveying shaft (133) is rotatably connected with the barrel body (131), the conveying shaft (133) is provided with a spiral blade (136), a feeding hole (134) is formed above the barrel body (131), and a discharging hole (135) is formed below the barrel body; the feed inlet (134) is communicated with the cache storage bin (1), and the discharge outlet (135) is communicated with the metering bin (2);
the spiral blade (136) comprises a conveying blade (13601) positioned between the feeding port (134) and the discharging port (135) and a leakage-proof blade (13602) positioned between the discharging port (135) and the output end of the conveying shaft (133), the rotating direction of the conveying blade (13601) is the same as the conveying direction of the conveying shaft (133), and the rotating direction of the leakage-proof blade (13602) is opposite to the conveying direction of the conveying shaft (133).
4. The water washing system for the ternary lithium battery material according to claim 3, wherein: the pitch of the conveying blade (13601) is gradually increased in the conveying direction.
5. The washing system of the ternary lithium battery material according to claim 4, wherein: the conveying blade (13601) close to the discharge hole (135) is of a double-channel spiral blade structure (138), and the thread pitches of the two channels of spiral blades (136) are the same and gradually increase along the conveying direction.
6. The system for washing with water a lithium ternary material for electrical batteries according to any of claims 1 to 5, characterized in that: the output end of the drying unit (7) is also connected with a cooler (11).
7. The utility model provides a system of processing suitable for lithium electricity ternary material which characterized in that: a water wash system comprising the lithium ternary material of any of claims 1-6;
still be equipped with three-way valve (8) between stirred tank (3) and pressure filter (4), three-way valve (8) contain input (801), first output (802) and second output (803), the output of stirred tank (3) is connected in input (801), input (801) of pressure filter (4) are connected in first output (802), input (801) of drying unit (7) are connected through bypass branch pipe (10) in second output (803).
8. The processing technology of the lithium ternary battery material is characterized by adopting the processing system of the lithium ternary battery material in claim 7, and mainly comprising the following steps of:
s1: quantitatively discharging the powder materials into a metering bin (2) from the buffer memory materials, and discharging the powder materials into a stirring kettle (3) by the metering bin (2) according to a certain amount;
s2: washing the materials in a stirring kettle (3) by using slurry or coating the materials by a wet method to form powder cakes, wherein when the washing process is adopted, the water temperature in the stirring kettle (3) is 5-15 ℃, the solid content of the powder cakes after washing is 30-50%, and when the wet coating process is adopted, the water temperature in the stirring kettle (3) is 70-85 ℃, and the solid content after coating is 50-70%;
s3: when the water washing process is adopted, the first output end (802) is opened, the second output end (803) is closed, the powder cake in the S2 is conveyed to a filter press (4) for primary drying, and the water content of the powder cake is reduced to be below 7%; when the wet coating process is adopted, the first output end (802) is closed, and the second output end (803) is opened;
s4: and (4) discharging the pressed powder in the S3 into a drying unit (7) for drying, wherein the water content of the dried material is less than 1000 ppm.
9. The processing technology of the lithium ternary material for the battery according to claim 8, characterized in that: and in the S1, the time for quantitatively conveying the materials from the metering bin (2) to the stirring kettle (3) is less than 5 min.
10. The processing technology of the lithium ternary material for the battery according to claim 8, characterized in that: and (3) stirring the powder material in the S2 in the stirring kettle (3) for 25-35 min.
Priority Applications (1)
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|---|---|---|---|
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