A device for removing chlorine element in high solid content type lithium manganate production trimanganese tetraoxide

Abstract

The utility model relates to lithium ion battery technical field discloses a high solid content type lithium manganate production manganese dioxide chlorine element removal device, including mounting bracket and rotating plate rotation connection in the left and right sides of the inner wall of mounting bracket, still include: fixed in the left side of mounting bracket motor, and the output shaft of motor penetrates mounting bracket and is fixedly connected between the left rotating plate, the utility model has multiple dehydration function, this device can first to the wet manganese dioxide filter cake extrusion dehydration, can remove the large amount of free water in filter cake in advance, greatly reduce the water content required to remove subsequent drying, then continue to the wet manganese dioxide filter cake and rotate drying treatment, make the wet manganese dioxide filter cake and hot air can fully contact, accelerate the moisture evaporation rate, further improve the drying efficiency, effectively avoid the manganese dioxide oxidation problem caused by local temperature too high, guarantee the chemical property stability of manganese dioxide, ensure that the product quality is not influenced.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery technology, specifically to a device for removing chlorine from manganese tetroxide in the production of high solid content lithium manganese oxide. Background Technology

[0002] In the field of lithium-ion batteries, with the market's increasing demands for battery performance, especially the urgent need for high energy density, low-cost manufacturing, and large-scale production, the solid content of lithium manganese oxide cathode slurry is currently around 55% to 60%. This solid content level limits the further improvement of electrode compaction density, which in turn affects the enhancement of energy battery density. It also restricts the reduction of manufacturing costs to some extent. In the production process of high solid content lithium manganese oxide, the removal of chlorine from manganese tetroxide is a key step. A higher chlorine content will increase the viscosity of the slurry, requiring the addition of more NMP solvent, thereby reducing the solid content.

[0003] Currently, when removing chlorine from manganese tetroxide using water washing purification, the washed slurry undergoes final solid-liquid separation to obtain a wet manganese tetroxide filter cake with low chlorine content. This wet manganese tetroxide filter cake then needs to be dried. However, current removal devices have low drying efficiency for wet manganese tetroxide filter cakes, failing to effectively remove moisture from the filter cake in a short time. Furthermore, they are prone to causing localized overheating of the wet manganese tetroxide filter cake, leading to oxidation of manganese tetroxide and resulting in poor drying effects. Utility Model Content

[0004] The purpose of this invention is to provide a device for removing chlorine from the production of manganese tetroxide in high-solids-content lithium manganese oxide, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for removing chlorine from manganese tetroxide produced from high-solids-content lithium manganese oxide, comprising a mounting frame and rotating plates rotatably connected to the left and right sides of the inner wall of the mounting frame, and further comprising: A motor is fixed on the left side of the mounting bracket, and the output shaft of the motor passes through the mounting bracket and is fixedly connected to the rotating plate on the left side. A fixed plate is fixed to the bottom of the opposite side surface of the rotating plate, and a movable plate is slidably connected to the top of the opposite side surface of the rotating plate. Grids are embedded on both the left and right sides of the fixed plate and the movable plate. An adjustment structure is provided on the surface of the rotating plate. A drying hood is fixed to the top of the inner wall of the mounting frame. A heating box is placed on the right side of the mounting frame, and a heating wire is installed inside the heating box. A fan is set on the right side of the heating box, and a connecting pipe is connected to the left side of the fan. One end of the connecting pipe is connected to the heating box. A vent pipe is connected to the left side of the top of the heating box, and the vent pipe passes through the mounting frame and is connected to the drying hood.

[0006] Preferably, a plurality of guide grooves are provided on the left and right sides of the top of the fixing plate, and the bottom of the inner wall of the guide groove is inclined. Drainage grooves are provided on the left and right sides of the top of the fixing plate and on the side of the guide groove, and the drainage grooves are connected to the guide grooves.

[0007] Preferably, the adjustment structure includes a fixed groove, a threaded rod, a knob, and a connecting block. The fixed groove is formed on the surface of the rotating plate on one side. The threaded rod is rotatably connected inside the fixed groove. The knob is rotatably connected to the top of the rotating plate and is fixedly connected to the top end of the threaded rod. The connecting block is slidably connected inside the fixed groove, and the threaded rod passes through the connecting block and is threadedly connected to the connecting block. One side of the connecting block is fixedly connected to the side of the movable plate.

[0008] Preferably, guide grooves are provided on both the front and rear sides of the inner wall of the fixing groove, and guide blocks are fixed on both the front and rear sides of the connecting block, and the guide blocks are located inside the guide grooves and are slidably connected to the inner wall of the guide grooves.

[0009] Preferably, the bottom of the inner wall of the mounting bracket is provided with a groove, and a waste liquid box is slidably connected inside the groove, and the waste liquid box is located below the fixing plate.

[0010] Preferably, handles are bolted to the left and right sides of the front side of the waste liquid box, and the surface of the inner wall of the waste liquid box is coated with an anti-corrosion coating, which is a polytetrafluoroethylene coating.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention features multiple dehydration functions. The device first squeezes and dehydrates the wet manganese tetroxide filter cake, removing a large amount of free water from the filter cake beforehand, greatly reducing the amount of water that needs to be removed during subsequent drying. Then, it continues to rotate and dry the wet manganese tetroxide filter cake, allowing it to fully contact the hot air, accelerating the evaporation rate, further improving drying efficiency, effectively avoiding the oxidation of manganese tetroxide caused by excessively high local temperatures, ensuring the chemical stability of manganese tetroxide, and ensuring that product quality is not affected. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2This is a three-dimensional schematic diagram of the mounting bracket in this utility model; Figure 3 This is a three-dimensional schematic diagram of the heating box in this utility model; Figure 4 This is a three-dimensional schematic diagram of the movable plate in this utility model; Figure 5 This utility model Figure 4 A magnified view of a section at point A in the middle; Figure 6 This is a cross-sectional view of the rotating plate in this utility model.

[0013] In the diagram: 1. Mounting bracket; 2. Rotating plate; 3. Motor; 4. Fixed plate; 5. Movable plate; 6. Grid; 7. Adjustment structure; 71. Fixed groove; 72. Threaded rod; 73. Knob; 74. Connecting block; 8. Drying hood; 9. Heating box; 10. Fan; 11. Connecting pipe; 12. Vent pipe; 13. Guide groove; 14. Guide block; 15. Guide groove; 16. Drainage groove; 17. Groove; 18. Waste liquid box. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-6 As shown, a device for removing chlorine from the production of manganese tetroxide in high-solids-content lithium manganese oxide includes a mounting frame 1. Rotating plates 2 are rotatably connected to both sides of the inner wall of the mounting frame 1. A motor 3 is fixed to the left side of the mounting frame 1, and the output shaft of the motor 3 passes through the mounting frame 1 and is fixedly connected to the rotating plate 2 on the left side. A fixed plate 4 is fixed to the bottom of the opposite side surface of the rotating plate 2. A movable plate 5 is slidably connected to the top of the opposite side surface of the rotating plate 2. Mesh 6 is embedded on both sides of the surfaces of the fixed plate 4 and the movable plate 5. An adjustment structure 7 is provided on the surface of the rotating plate 2. A drying hood 8 is fixed to the top of the inner wall of the mounting frame 1. A heating box 9 is placed on the right side of the mounting frame 1, and a heating wire is installed inside the heating box 9. A fan 10 is provided on the right side of the heating box 9, and a connecting pipe 11 is connected to the left side of the fan 10. One end of the connecting pipe 11 is connected to the heating box 9. A vent pipe 12 is connected to the left side of the top of the heating box 9, and the vent pipe 12 passes through the mounting frame 1 and is connected to the drying hood 8.

[0016] Several guide grooves 15 are provided on the left and right sides of the top of the fixed plate 4, and the bottom of the inner wall of the guide groove 15 is inclined. Drainage grooves 16 are provided on the left and right sides of the top of the fixed plate 4 and on one side of the guide groove 15. The drainage grooves 16 are connected to the guide grooves 15. After the wet manganese tetroxide filter cake is placed on the front and back sides of the middle of the top of the fixed plate 4, the wet manganese tetroxide filter cake is squeezed and dehydrated by pressing down by the upper movable plate 5, squeezing out the free water inside the wet manganese tetroxide filter cake. The free water can be guided through the guide grooves 15 on both sides, and finally discharged through the drainage grooves 16.

[0017] The adjustment structure 7 includes a fixed groove 71, a threaded rod 72, a knob 73, and a connecting block 74. The fixed groove 71 is formed on the surface of the rotating plate 2 on one side. The threaded rod 72 is rotatably connected inside the fixed groove 71. The knob 73 is rotatably connected to the top of the rotating plate 2 and is fixedly connected to the top end of the threaded rod 72. The connecting block 74 is slidably connected inside the fixed groove 71, and the threaded rod 72 passes through the connecting block 74 and is threadedly connected to it. One side of the connecting block 74 is fixedly connected to the side of the movable plate 5. Guide grooves 13 are formed on both the front and rear sides of the inner wall of the fixed groove 71. Guide blocks 14 are fixed on both the front and rear sides of the connecting block 74, and the guide blocks 14 are located inside the guide grooves 13 and are slidably connected to the inner wall of the guide grooves 13. The operator rotates the knob 73 at the top to adjust the position. The threaded rod 72 rotates, and the connecting block 74 moves on the surface of the threaded rod 72. The connecting block 74 can be guided by the guide groove 13 and the guide block 14, which increases the stability of the movable plate 5 when it moves up and down. After the movable plate 5 descends, it squeezes the wet manganese tetroxide filter cake placed on the top of the fixed plate 4. After the wet manganese tetroxide filter cake is initially squeezed and dehydrated, the movable plate 5 is controlled to rise again, and then the wet manganese tetroxide filter cake is placed above the grid 6 on both sides of the surface of the fixed plate 4. Then the movable plate 5 falls again, and the wet manganese tetroxide filter cake is clamped by the grid 6. Then the motor 3 on one side drives the wet manganese tetroxide filter cake to rotate, and the drying hood 8 above discharges the heated air to dry and dehydrate the wet manganese tetroxide filter cake again.

[0018] The bottom of the inner wall of the mounting frame 1 has a groove 17, and a waste liquid box 18 is slidably connected inside the groove 17. The waste liquid box 18 is located below the fixing plate 4. Handles are bolted to the left and right sides of the front of the waste liquid box 18. The surface of the inner wall of the waste liquid box 18 is coated with an anti-corrosion coating, which is a polytetrafluoroethylene coating. When the movable plate 5 is pressed down to squeeze and dehydrate the wet manganese tetroxide filter cake, the waste liquid box 18 below can receive the discharged free water waste liquid to prevent the waste liquid from causing corrosion and pollution to the surrounding area. After dehydration is completed, the staff can pull the waste liquid box 18 forward to remove it.

[0019] Working principle: The operator places the washed wet manganese tetroxide filter cake in the top center area of ​​the fixed plate 4. By rotating the knob 73, the threaded rod 72 rotates, causing the connecting block 74 to move vertically downward under the limit of the guide block 14 and the guide groove 13. This pushes the movable plate 5 to apply mechanical pressure to the wet filter cake. The free water in the filter cake is squeezed out and flows directionally along the guide groove 15 on the surface of the fixed plate 4, and is finally discharged through the drain trough 16. The corrosive waste liquid containing chloride ions, manganese ions and acidic components falls into the waste liquid box 18 below. The polytetrafluoroethylene coating on the inner wall of the waste liquid box 18 effectively isolates the corrosive medium and prevents equipment damage. After the initial squeezing and dehydration is completed, the knob 73 is rotated in the opposite direction to lift the movable plate 5, transferring the filter cake to both sides of the fixed plate 4. In grid 6 area, the movable plate 5 presses down a second time to clamp the filter cake through grid 6. At this time, the motor 3 is started to drive the rotating plate 2 and the fixed plate 4 to rotate as a whole. Simultaneously, the heating wire and fan 10 in the heating box 9 are turned on. The hot air is delivered to the drying hood 8 through the air pipe 12. The high temperature air penetrates the grid 6 and fully contacts the rotating filter cake. During this dynamic drying process, the rotating action keeps the filter cake turning, avoiding local overheating that could lead to the oxidation of manganese tetroxide. The grid 6 structure increases the evaporation surface area and improves the dehydration efficiency. When the moisture content of the filter cake drops to the target value, the motor 3 and the drying process are stopped. The movable plate 5 is raised to remove the dried material, thus completing the removal and drying of chlorine from manganese tetroxide and providing low-chlorine raw materials for the production of high-solids lithium manganese oxide.

[0020] 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 device for removing chlorine from the production of manganese tetroxide from high-solids-content lithium manganese oxide, comprising a mounting frame (1) and rotating plates (2) rotatably connected to the left and right sides of the inner wall of the mounting frame (1), characterized in that, Also includes: A motor (3) is fixed on the left side of the mounting bracket (1), and the output shaft of the motor (3) passes through the mounting bracket (1) and is fixedly connected to the rotating plate (2) on the left side. A fixed plate (4) is fixed at the bottom of the opposite side surface of the rotating plate (2), and a movable plate (5) is slidably connected above the opposite side surface of the rotating plate (2). A grid (6) is embedded on both the left and right sides of the fixed plate (4) and the movable plate (5). An adjustment structure (7) is provided on the surface of the rotating plate (2). A drying hood (8) is fixed to the top of the inner wall of the mounting frame (1). A heating box (9) is placed on the right side of the mounting frame (1), and a heating wire is installed inside the heating box (9). A fan (10) is provided on the right side of the heating box (9), and a connecting pipe (11) is connected to the left side of the fan (10). One end of the connecting pipe (11) is connected to the heating box (9). A ventilation pipe (12) is connected to the left side of the top of the heating box (9), and the ventilation pipe (12) passes through the mounting frame (1) and is connected to the drying hood (8).

2. The chlorine removal device for the production of manganese tetroxide from high-solids-content lithium manganese oxide according to claim 1, characterized in that: The top of the fixed plate (4) has several guide grooves (15) on both the left and right sides, and the bottom of the inner wall of the guide groove (15) is inclined. The top of the fixed plate (4) has drain grooves (16) on both the left and right sides and on one side of the guide groove (15), and the drain groove (16) is connected to the guide groove (15).

3. The chlorine removal device for the production of manganese tetroxide from high-solids-content lithium manganese oxide according to claim 1, characterized in that: The adjustment structure (7) includes a fixed groove (71), a threaded rod (72), a knob (73), and a connecting block (74). The fixed groove (71) is opened on the surface of the rotating plate (2) facing each other. The threaded rod (72) is rotatably connected to the inside of the fixed groove (71). The knob (73) is rotatably connected to the top of the rotating plate (2) and is fixedly connected to the top of the threaded rod (72). The connecting block (74) is slidably connected to the inside of the fixed groove (71). The threaded rod (72) passes through the connecting block (74) and is threadedly connected to the connecting block (74). One side of the connecting block (74) is fixedly connected to the side of the movable plate (5).

4. The chlorine removal device for the production of manganese tetroxide from high-solids-content lithium manganese oxide according to claim 3, characterized in that: The front and rear sides of the inner wall of the fixed groove (71) are provided with guide grooves (13), and the front and rear sides of the connecting block (74) are fixed with guide blocks (14), and the guide blocks (14) are located inside the guide groove (13) and are slidably connected to the inner wall of the guide groove (13).

5. The chlorine removal device for the production of manganese tetroxide from high-solids-content lithium manganese oxide according to claim 1, characterized in that: The bottom of the inner wall of the mounting bracket (1) is provided with a groove (17), and a waste liquid box (18) is slidably connected inside the groove (17), and the waste liquid box (18) is located below the fixing plate (4).

6. The chlorine removal device for the production of manganese tetroxide from high-solids-content lithium manganese oxide according to claim 5, characterized in that: The waste liquid box (18) has handles on both the left and right sides of the front side. The inner wall of the waste liquid box (18) is coated with an anti-corrosion coating, which is a polytetrafluoroethylene coating.

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