Efficient anti-caking continuous crystallization device for battery-grade lithium carbonate

Abstract

The utility model relates to the technical field of crystallization devices, in particular to an efficient anti-caking continuous crystallization device for battery-grade lithium carbonate. The cylinder body is communicated with the cylinder cover; the cylinder cover is connected with the cylinder body through a bolt; the motor drives the eccentric wheel to rotate, so that the eccentric wheel synchronously drives the brake rod to circumferentially rotate in the connecting frame, and the connecting frame drives the two groups of rubber blocks to slide back and forth in the two groups of connecting seats and to impact the inner wall of the barrel in a reciprocating manner, so that the inner wall of the barrel is driven to rotate by the brake rod. The rubber block directly acts on a wall crystal adhesion layer to form periodic wall shear stress, the periodic wall shear stress can act on a low-flow-speed dead zone in the barrel to peel off microcrystalline deposits in real time, and synchronously generated intergranular collision can refine fine grain aggregates enriched at the bottom, so that the inner wall of the barrel can be continuously oscillated, and the service life of the barrel is prolonged. And the condition of crystal caking in the cylinder body is prevented.

Description

Technical Field

[0001] This utility model relates to the field of crystallization device technology, specifically to a high-efficiency anti-caking battery-grade lithium carbonate continuous crystallization device. Background Technology

[0002] With the rapid development of new energy vehicles and the energy storage industry, lithium carbonate, as a key precursor for lithium-ion battery cathode materials, directly affects battery performance due to its purity, crystal morphology, and particle size distribution stability. Traditional intermittent crystallization processes suffer from high energy consumption, long production cycles, and poor product consistency, and are difficult to meet the requirements of large-scale continuous production. In recent years, continuous crystallization technology has emerged as a promising option due to its advantages, including continuous and controllable processes, high mass and heat transfer efficiency, and uniform product particle size distribution.

[0003] In the prior art, a device for achieving uniform particle size distribution of lithium carbonate crystals includes an outer cylinder, which includes a cylinder body, a cylinder bottom, and a cap; a guide cylinder is provided inside the cylinder body, a through hole is opened on the cap, a motor is provided on the outer surface of the cap, the output end of the motor is connected to a propeller shaft, and the propeller shaft extends into the guide cylinder through the through hole.

[0004] To address the challenges of existing continuous crystallization devices for battery-grade lithium carbonate, which suffer from localized oversaturation during crystallization leading to localized nucleation bursts and the accumulation of fine crystals at the bottom, current technologies employ propeller-driven propellers. These propellers offer superior hydrodynamic performance, reducing the time required for complete mixing and lowering agitation power consumption. While increasing the fluid flow rate between the guide tube and the main body generates a higher wall shear rate, mitigating crystal adhesion, the propeller-driven propeller, despite enhancing internal circulation, still relies on contact structures like annular screens or scrapers for removing microcrystals in low-velocity areas, leaving cleaning dead zones. Furthermore, the dynamic fluctuations in localized oversaturation exacerbate disordered crystal nucleus adhesion, and the agglomerates formed by the accumulation of fine crystals at the bottom under gravity are difficult to disperse completely through the axial flow field, necessitating further improvements. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency anti-caking continuous crystallization device for battery-grade lithium carbonate, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency anti-caking battery-grade lithium carbonate continuous crystallization device, comprising;

[0007] The cylindrical body is connected to the cylinder cover;

[0008] The cylinder cover is connected to the cylinder body by bolts;

[0009] The circulation pipes are located on the sides and bottom of the cylinder.

[0010] A cooling mechanism is disposed on the surface of the other end of the circulation pipe;

[0011] The liquid outlet is located on the right side of the cooling mechanism and is connected to the interior of the cooling mechanism.

[0012] The liquid inlet is located on the outer wall of the cooling mechanism below the liquid outlet;

[0013] The rubber block is arranged laterally inside the cylinder cover;

[0014] The oscillation component is located on the top of the cylinder cover and drives the rubber block to move left and right, impacting the inside of the cylinder.

[0015] As a further preferred embodiment of this technical solution, the oscillation assembly includes a connecting frame disposed on the top of the cylinder cover, a motor fixedly connected to the top of the connecting frame, and an eccentric wheel disposed at the bottom of the motor, the eccentric wheel rotating inside the cylinder cover.

[0016] As a further preferred embodiment of this technical solution, two sets of connecting seats are symmetrically arranged on the inner walls of the cylinders on both sides of the eccentric wheel, and rubber blocks slide inside both sets of connecting seats.

[0017] As a further preferred embodiment of this technical solution, a connecting frame is fixedly connected to one side surface of the two sets of rubber blocks, and a brake rod is fixedly connected to the bottom of the eccentric wheel, with the brake rod inserted into the connecting frame.

[0018] As a further preferred embodiment of this technical solution, a stirring mechanism is provided at the bottom of the brake rod, and a stirring rod is provided at the bottom of the stirring mechanism. The stirring mechanism drives the stirring rod to rotate through the brake rod, and the stirring rod is used to stir the inside of the cylinder.

[0019] As a further preferred embodiment of this technical solution, the stirring mechanism includes a turntable disposed at the bottom of the brake lever, and four sets of connecting plates are fixedly connected at equal intervals to the outer wall of the turntable.

[0020] As a further preferred embodiment of this technical solution, each of the four sets of connecting plates is fixedly connected to a cleaning scraper on the side surface facing the cylinder, the outer wall of each of the four sets of cleaning scrapers is in contact with the inner wall of the cylinder, and a stirring rod is fixedly connected to the bottom of each of the four sets of connecting plates.

[0021] As a further preferred embodiment of this technical solution, the four sets of cleaning scrapers are all designed with an inclined shape on both sides, and the inclined direction converges from both sides of the connecting plate to the middle of the connecting plate.

[0022] This invention provides a highly efficient, anti-caking, continuous crystallization device for battery-grade lithium carbonate, which has the following advantages:

[0023] This invention uses a motor to drive an eccentric wheel to rotate, which in turn drives a brake rod to rotate in a circular motion within a connecting frame. The connecting frame then causes two sets of rubber blocks to slide back and forth within two sets of connecting seats, repeatedly impacting the inner wall of the cylinder. This allows the rubber blocks to directly act on the crystal deposit layer on the wall, creating periodic wall shear stress. This stress not only acts on the low-flow-rate dead zone within the cylinder, effectively stripping away microcrystalline deposits in real time, but also simultaneously generates intercrystalline collisions that refine the fine crystal aggregates accumulated at the bottom. This continuous oscillation of the inner wall of the cylinder prevents crystal agglomeration, resulting in a relatively uniform distribution of microcrystalline deposits within the device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a bottom view of the overall structure of this utility model;

[0026] Figure 3 This is a three-dimensional cross-sectional view of the oscillation component of this utility model;

[0027] Figure 4 This is a three-dimensional cross-sectional structural diagram of the stirring mechanism of this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the vibration component and stirring mechanism of this utility model.

[0029] In the diagram: 1. Cylinder body; 2. Cylinder cover; 3. Circulation pipe; 4. Cooling mechanism; 5. Liquid outlet; 6. Liquid inlet; 7. Rubber block; 71. Vibration assembly; 711. Connecting frame; 712. Motor; 713. Eccentric wheel; 714. Connecting seat; 715. Connecting frame; 716. Brake rod; 8. Stirring rod; 81. Stirring mechanism; 811. Turntable; 812. Connecting plate; 813. Cleaning scraper. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0031] This utility model provides a technical solution: such as Figures 1 to 5 As shown in this embodiment, a high-efficiency anti-caking battery-grade lithium carbonate continuous crystallization device includes several parts such as a cylinder 1, a cylinder cover 2, a circulation pipe 3, a cooling mechanism 4, a liquid outlet 5, a liquid inlet 6, and a rubber block 7.

[0032] The cylinder 1 is connected to the cylinder cover 2, and the cylinder cover 2 and the cylinder 1 are connected to each other by bolts. The circulation pipe 3 is set on the side and bottom of the cylinder 1. The cooling mechanism 4 is set on the other end surface of the circulation pipe 3. The liquid outlet 5 is set on the right side of the cooling mechanism 4 and is connected to the inside of the cooling mechanism 4. The liquid inlet 6 is set on the outer wall of the cooling mechanism 4 below the liquid outlet 5. The rubber block 7 is set horizontally inside the cylinder cover 2. The vibration component 71 is set on the top of the cylinder cover 2 and drives the rubber block 7 to move left and right and impact the inside of the cylinder 1.

[0033] The oscillation assembly 71 includes a connecting frame 711 mounted on the top of the cylinder cover 2. A motor 712 is fixedly connected to the top of the connecting frame 711. An eccentric wheel 713 is mounted on the bottom of the motor 712 and rotates inside the cylinder cover 2. Two sets of connecting seats 714 are symmetrically arranged on the inner walls of the cylinder 1 on both sides of the eccentric wheel 713. Rubber blocks 7 slide inside each of the two sets of connecting seats 714. A connecting frame 715 is fixedly connected to one side of the corresponding side of the two sets of rubber blocks 7. A brake rod 716 is fixedly connected to the bottom of the eccentric wheel 713 and is inserted into the connecting frame 715. The output shaft of the motor 712 passes through the cylinder cover 2 and is rotatably sleeved inside the cylinder cover 2. The end of the output shaft away from the motor 712 is fixedly connected to the eccentric wheel 713. The eccentric wheel 713 is rotatably mounted below the cylinder cover 2 via the output shaft.

[0034] The motor 712 drives the eccentric wheel 713 to rotate, which in turn drives the brake rod 716 to rotate in a circle within the connecting frame 715. The connecting frame 715 drives the two sets of rubber blocks 7 to slide back and forth within the two sets of connecting seats 714 and repeatedly impact the inner wall of the cylinder 1. This causes the rubber blocks 7 to directly act on the crystal adhesion layer on the wall, forming periodic wall shear stress, which causes the crystals attached to the inner wall of the cylinder 1 to fall off and sink to the bottom of the cylinder 1, thereby achieving the purpose of continuous anti-clustering of crystals.

[0035] Furthermore, a stirring mechanism 81 is provided at the bottom of the brake lever 716, and a stirring rod 8 is provided at the bottom of the stirring mechanism 81. The stirring mechanism 81 drives the stirring rod 8 to rotate through the brake lever 716. The stirring rod 8 is used to stir the inside of the cylinder 1. The stirring mechanism 81 includes a turntable 811 provided at the bottom of the brake lever 716. Four sets of connecting plates 812 are fixedly connected at equal intervals on the outer wall of the turntable 811. A cleaning scraper 813 is fixedly connected to the surface of the four sets of connecting plates 812 facing the cylinder 1. The outer walls of the four sets of cleaning scrapers 813 are all in contact with the inner wall of the cylinder 1. The stirring rod 8 is fixedly connected to the bottom of the four sets of connecting plates 812.

[0036] While the brake lever 716 rotates, the connecting plate 812 drives the four sets of cleaning scrapers 813 and the four sets of stirring rods 8 to rotate. The four sets of cleaning scrapers 813 scrape off the deposits on the inner wall of the cylinder 1. At the same time, the four sets of rotating stirring rods 8 can also stir the middle area at the bottom of the cylinder 1, so that the crystals in the middle area are mixed, further preventing the crystals from clumping.

[0037] Furthermore, the four sets of cleaning scrapers 813 are all designed with an inclined shape on both sides, and the inclined direction converges from both sides of the connecting plate 812 towards the middle of the connecting plate 812. This allows the brake lever 716 to scrape off the deposits on the inner wall of the cylinder 1 when the cleaning scraper 813 rotates forward and backward, and to slide the deposits along the inclined surfaces on both sides of the brake lever 716 to the middle position at the bottom of the cylinder 1.

[0038] This utility model provides a high-efficiency anti-caking continuous crystallization device for battery-grade lithium carbonate. The specific working principle is as follows: When the cylinder 1 crystallizes battery-grade lithium carbonate, the motor 712 is started, which drives the eccentric wheel 713 to rotate. The eccentric wheel 713 synchronously drives the brake rod 716 to rotate in a circle within the connecting frame 715. Through the connecting frame 715, the two sets of rubber blocks 7 slide back and forth within the two sets of connecting seats 714 and repeatedly impact the inner wall of the cylinder 1, causing the crystals attached to the inner wall of the cylinder 1 to fall off and sink to the bottom of the cylinder 1. At the same time, the eccentric wheel 713 rotates, and through the connecting plate 812, it drives the four sets of cleaning scrapers 813 and the four sets of stirring rods 8 to rotate. The four sets of cleaning scrapers 813 scrape off the deposits on the inner wall of the cylinder 1. At the same time, the four sets of rotating stirring rods 8 can also stir the middle area of ​​the bottom of the cylinder 1, mixing the crystals in the middle area and further preventing crystal agglomeration.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A continuous crystallization device for high-efficiency anti-caking battery-grade lithium carbonate, characterized in that: Include; cylinder (1), with the cylinder cover (2) connected; cylinder cover (2), with the cylinder (1) through bolt interconnection; circulation pipeline (3), set in the cylinder (1) side and bottom; cooling mechanism (4), set in the other end surface of the circulation pipeline (3); liquid outlet (5), set in the cooling mechanism (4) right side and with cooling mechanism (4) inside connected; liquid inlet (6), set in the cooling mechanism (4) outside wall below the liquid outlet (5); rubber block (7), transverse setting in the cylinder cover (2) inside; oscillation assembly (71), set in the cylinder cover (2) top and drive rubber block (7) left and right movement and impact on the inside of the cylinder (1).

2. The continuous crystallization device of high-efficient anti-caking battery-grade lithium carbonate according to claim 1, characterized in that: The oscillation assembly (71) includes a connecting frame (711) provided on the top end of the cylinder cover (2), the connecting frame (711) top fixedly connected with motor (712), the motor (712) bottom provided with eccentric wheel (713), and the eccentric wheel (713) rotates in the cylinder cover (2).

3. The continuous crystallization apparatus for high-efficient anti-caking battery-grade lithium carbonate according to claim 2, characterized in that: The eccentric wheel (713) both sides of the cylinder (1) inner wall is provided with two groups of connecting seat (714) symmetrically, two groups of the connecting seat (714) are slidably provided with rubber block (7).

4. The continuous crystallization apparatus for high-efficient anti-caking battery-grade lithium carbonate according to claim 3, characterized in that: Two groups of the rubber block (7) corresponding side surface is fixedly connected with the connecting frame (715), the eccentric wheel (713) bottom fixedly connected with brake lever (716), the brake lever (716) is inserted in the connecting frame (715).

5. The continuous crystallization apparatus for high efficient anti-caking battery grade lithium carbonate according to claim 4, characterized in that: The brake lever (716) bottom is provided with stirring mechanism (81), the stirring mechanism (81) bottom is provided with stirring rod (8), the stirring mechanism (81) drives the stirring rod (8) to rotate through brake lever (716), the stirring rod (8) is used for stirring the inside of the cylinder (1).

6. The continuous crystallization apparatus for high efficient anti-caking battery grade lithium carbonate according to claim 5, characterized in that: The stirring mechanism (81) includes a rotating disc (811) provided on the bottom of the brake lever (716), the rotating disc (811) outer wall is fixedly connected with four groups of connecting plates (812) at equal intervals.

7. The continuous crystallization apparatus for high-efficient anti-caking battery-grade lithium carbonate according to claim 6, characterized in that: Four groups of the connecting plate (812) side surface towards the cylinder (1) are all fixedly connected with cleaning scraper (813), four groups of the cleaning scraper (813) outer wall are all attached to the inner wall of the cylinder (1), four groups of the connecting plate (812) bottom are all fixedly connected with stirring rod (8).

8. A continuous crystallization apparatus for high efficiency anti-caking battery grade lithium carbonate as claimed in claim 7, wherein: Four groups of the cleaning scraper (813) both sides are designed to be inclined, and the inclined direction converges from both sides of the connecting plate (812) to the middle of the connecting plate (812).

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