A continuous production device for high-temperature reaction of lithium battery materials

Abstract

The present invention discloses a continuous production device for high-temperature reaction of lithium battery materials, which relates to the field of high-temperature reaction equipment for lithium battery materials. It mainly includes a feeding device, a rotating high-temperature kettle arranged in a shell electric furnace, a composite sealing device arranged at the connection between the rotating high-temperature kettle and a fixed cylinder, and a stirring and pushing device arranged inside the rotating high-temperature kettle. The beneficial effects of the present invention are as follows: By setting the stirring and pushing device, the length of the rotating high-temperature kettle is only 1 / 3 to 1 / 5 of the original length. The stiffness of the rotating high-temperature kettle and the stirring and pushing device is increased, the stability is increased, the cost is reduced, and the electric energy is saved. The stirring is uneven and the impurity volatilization is insufficient. By setting the composite sealing device, the powdery lithium battery materials invade all the gaps in the composite sealing cavity, and the resistance of the "inverted U-shaped" path enables the powdery lithium battery materials to melt into all the gaps in the composite sealing cavity and accumulate, participating in sealing and lubrication to form a virtuous cycle.

Description

Technical Field

[0001] The present invention relates to a high-temperature reaction device for continuous automated production of lithium battery materials, and particularly to a high-temperature reaction continuous production device with low manufacturing cost, stable performance, high efficiency, low energy consumption, and capable of producing high-quality lithium battery materials. Technical Background

[0002] In the production of lithium battery materials, it is required to heat to 500°C to 1000°C and maintain for 4 - 8 hours. To meet this condition, the original high-temperature reaction continuous production equipment for lithium battery materials was huge in size, with the length of a single furnace body being 14 meters to 19 meters, high manufacturing cost, unstable performance, high energy consumption, large heating deformation, powder leakage and air leakage; the original high-temperature reaction continuous production equipment for lithium battery materials transported and stirred lithium battery materials by welding blades on the inner wall of a rotating high-temperature kettle. This structure had uneven mixing, insufficient volatilization of impurities, and reduced product quality; due to the shielding effect of the blades on the inner wall of the rotating high-temperature kettle, lithium battery materials adhered to the furnace wall, reducing the quality of lithium battery materials; in order to improve the quality of lithium battery materials, the original equipment manufacturers once installed a conveying auger separately in the rotating high-temperature kettle, but due to the large span and reduced stiffness of the 14-meter to 19-meter long shaft, large deformation, and bearing seizure and motor burnout during rotation, the original equipment manufacturers replaced the independent conveying auger with welding blades on the inner wall of the rotating high-temperature kettle, and the equipment was made 14 meters to 19 meters long to meet the movement of lithium battery materials in the rotating high-temperature kettle for 4 - 8 hours for feeding and discharging, with high manufacturing cost, unstable performance, high energy consumption, large heating deformation, powder leakage and air leakage, which restricted the application and promotion of high-temperature reaction continuous production equipment for lithium battery materials. Therefore, a high-temperature reaction continuous production equipment for lithium battery materials is proposed, whose length is only 1 / 3 to 1 / 5 of the original. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-temperature reaction continuous production equipment for lithium battery materials to solve the problems raised in the above technical background.

[0004] To achieve the above-mentioned invention purpose and address the above technical problems, the present invention proposes the following technical solutions:

[0005] A high-temperature reaction continuous production equipment for lithium battery materials includes a feeding device, a shell electric furnace, a rotating high-temperature kettle, a composite sealing device, a fixed cylinder, a base, a roller A, a roller B, a high-temperature kettle driving motor, a stirring and pushing device driving motor, and a stirring and pushing device; the feeding device, the shell electric furnace, the fixed cylinder, the roller, the high-temperature kettle driving motor, and the stirring and pushing device driving motor are respectively installed on the base;

[0006] The shell electric furnace is a component for heating the rotating high-temperature kettle, including an outer shell, a heat insulation layer, a resistance heating element, etc.;

[0007] The composite sealing device is installed at the connection and mating part between the rotary high-temperature kettle and the fixed cylinder. The rotary high-temperature kettle is placed on top of roller A and roller B. The rotary high-temperature kettle rotates around its own central axis and is placed inside the shell electric furnace. The high-temperature kettle driving motor drives the rotary high-temperature kettle to rotate, and the stirring and feeding device driving motor drives the stirring and feeding device to rotate;

[0008] The inner wall of the rotary high-temperature kettle is smooth and includes a rotary cylinder, track A, track B, sprocket two, and maintenance and cleaning port. The rotary cylinder is a cylinder with cavities at both ends that are open. Track A is placed on roller A, and track B is placed on roller B. The high-temperature kettle driving motor drives the rotary high-temperature kettle to rotate through sprocket two. The maintenance and cleaning port is in a closed state and is opened during maintenance;

[0009] The composite sealing device includes a rotary cylinder, a fixed cylinder, a fixed flange, fixed adjustment bolts, a basic sealing ring, a rotary sealing cavity, fastening bolts, a rotary flange, rotary adjustment bolts, and an airtight sealing ring. The basic sealing ring is placed in the cavity at the connection and mating part between the inner wall of the fixed cylinder and the outer wall of the rotary cylinder. The fixed flange is connected to the right end of the fixed cylinder through the fixed adjustment bolts. The basic sealing ring is adjusted for tightness through the fixed adjustment bolts. The basic sealing ring is arranged along the central axis direction between the outer wall of the rotary cylinder and the inner wall of the fixed cylinder. Threaded holes are evenly arranged in the circumferential direction at the right end of the fixed cylinder. The rotary sealing cavity is composed of two symmetric hollow semi-cylinders, and threaded holes are evenly arranged in the circumferential direction at the left end. The right end of the rotary sealing cavity is fixed on the rotary drum through the fastening bolts. A composite sealing cavity is formed between the inner wall of the rotary sealing cavity and the outer wall of the fixed cylinder, and multiple airtight sealing rings are placed in the composite sealing cavity. The rotary adjustment bolts connect the rotary flange to the right end of the rotary sealing cavity to adjust the airtight sealing rings. The rotary sealing cavity completely seals the cavity where the basic sealing ring is located for the second time, forming the composite sealing device of the present invention;

[0010] The stirring and feeding device (111) includes: a bearing seat (11), a bearing (12), a cooling cavity (13), a sprocket one (14), a sealing ring (15), a blanking spiral (201), a reverse spiral (202), a forward spiral (203), a stirring fan blade (204), and a rotating shaft (205);

[0011] The bearing (12) is placed inside the bearing housing (11). The bearing housing (11) is connected to the end of the cooling chamber (13). The cooling chamber (13) is respectively connected to the ends of the feeding device (101) and the fixed cylinder (2). The rotating shaft (205) passes through the bearing (12). The sealing ring (15) is placed between the bearing housing (11) and the cooling chamber (13). The first sprocket (14) is installed at the end of the rotating shaft 205. The blanking spiral (201), the reverse spiral (202), and the forward spiral (203) are respectively welded on the rotating shaft (205). The blade width of the reverse spiral (202) is smaller than that of the forward spiral (203), and the rotation directions are opposite. Driven by the forward spiral (203) and the reverse spiral (202), the lithium battery material moves forward and backward in the rotating high-temperature kettle (103) in an alternating manner, so that the lithium battery material moves a short distance in a long time. By adjusting the rotation speeds of the rotating high-temperature kettle (103) and the stirring and feeding device (111), the lithium battery material continuously feeds and discharges in the rotating high-temperature kettle (103) for 4 - 8 hours. The stirring fan blades (204) are welded on the rotating shaft (205), and the stirring fan blades (204) evenly stir the lithium battery material at the inner wall and the center line of the rotating high-temperature kettle (103).

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] The inner wall of the rotating cylinder is smooth, avoiding the blocking and shielding effect of the blades welded on the inner wall of the original continuous production equipment for the high-temperature reaction of lithium battery materials, which causes the lithium battery materials to stick to the furnace wall, the lithium battery materials to be unevenly mixed, and the harmful impurities to volatilize insufficiently, reducing the quality of the lithium battery materials.

[0014] The rotation directions of the reverse spiral (202) and the forward spiral (203) welded on the rotating shaft (205) are opposite, causing the lithium battery materials in the rotating high-temperature kettle (103) to move left and right alternately. The blade width of the forward spiral (203) is larger than that of the reverse spiral (202), making the lithium battery materials move for a long time but a short distance. By making the length of the rotating high-temperature kettle (103) 1 / 3 to 1 / 5 of that of the prior art, the lithium battery materials can continuously feed and discharge in the rotating high-temperature kettle (103) for 4 - 8 hours. The lengths of the rotating high-temperature kettle (103) and the rotating shaft (205) are reduced, the stiffness is increased, the high-temperature deformation is reduced, the stability is increased, the material selection is broadened, and the cost is reduced.

[0015] The rotary high-temperature kettle (103) and the stirring and feeding device (111) can rotate in the same direction or in the opposite direction, and the rotation speed is continuously adjustable from 10 to 45 revolutions per minute, which enlarges the process window and meets the production process requirements of lithium battery materials by adjusting the rotation speed; the stirring fan blades (204) are welded on the rotating shaft (205), and the rotation speed of the stirring fan blades (204) is 10 to 45 revolutions per minute, which makes the lithium battery materials mix evenly, and the harmful impurities volatilize sufficiently, improving the quality of lithium battery materials.

[0016] At the connection and cooperation part between the rotating cylinder and the fixed cylinder, the composite sealing device is provided. The movement trajectories of the internal air flow and the lithium battery material powder in the rotating cylinder towards the external environment are in a "reverse U shape", which increases the resistance to the exchange between the internal air flow in the rotating cylinder and the external environment. Most of the air flow and lithium battery powder leaking at the connection between the rotating cylinder and the fixed cylinder are blocked after passing through the cavity where the basic sealing ring is located. A small part moves through the "reverse U shape" trajectory to the cavity where the airtight sealing ring is located and is completely blocked. The positive pressure in the rotating cylinder causes the powdered lithium battery material to invade into the gaps everywhere in the composite sealing cavity. Due to the resistance of the "reverse U shape" movement trajectory, the powdered lithium battery material melts into the gaps everywhere in the composite sealing cavity. The accumulated powdered lithium battery material directly participates in sealing and lubrication to form a virtuous cycle, making the relative movement resistance between the rotating cylinder and the fixed cylinder decrease and the sealing be tight. The composite sealing device of the equipment does not need to be shut down for maintenance for a long time, saving electric energy, reducing the labor intensity of the staff, and improving production efficiency and product quality. Description of the Drawings

[0017] Figure 1 It is the external view and the partial view A of a continuous production equipment for high-temperature reaction of lithium battery materials;

[0018] Figure 2 It is the axial sectional view of a continuous production equipment for high-temperature reaction of lithium battery materials;

[0019] Figure 3 It is the partial sectional view of a continuous production equipment for high-temperature reaction of lithium battery materials and the partial view W of the composite sealing device;

[0020] Figure 4 It is the three-dimensional view of the combination of the fastening bolts, the rotating seal cavity, the rotating flange, and the rotating adjusting bolts of the composite sealing device of a continuous production equipment for high-temperature reaction of lithium battery materials;

[0021] Figure 5 It is the axial sectional view of the rotary high-temperature kettle of a continuous production equipment for high-temperature reaction of lithium battery materials;

[0022] Figure 6 It is the three-dimensional view of the stirring and feeding device of a continuous production equipment for high-temperature reaction of lithium battery materials;

[0023] Figure 7 An axial sectional view of a stirring and pushing device of a continuous production device for high-temperature reaction of lithium battery materials;

[0024] Figure 8 A partial view A of a stirring and pushing device of a continuous production device for high-temperature reaction of lithium battery materials. Specific embodiments

[0025] To describe in detail the technical content, structural features, and achieved effects of the present invention, the following will be described in detail in conjunction with the embodiments and with reference to the accompanying drawings.

[0026] Please refer to Figure 1 , Figure 2 , a continuous production device for high-temperature reaction of lithium battery materials includes a feeding device 101, a shell electric furnace 102, a rotating high-temperature kettle 103, a composite sealing device 104, a fixed cylinder 2, a base 106, a roller A 107, a roller B 108, a rotating high-temperature kettle driving motor 109, a stirring and pushing device driving motor 110, and a stirring and pushing device 111; the feeding device 101 pours the lithium battery materials in the silo into the rotating high-temperature kettle 103, and through the stirring and conveying of the stirring and pushing device 111, continuously discharges the materials into the fixed cylinder 2;

[0027] Please refer to Figure 2 , Figure 5 , the rotating high-temperature kettle 103 is installed inside the shell electric furnace 102, and includes a rotating cylinder 1, a track A 17, a track B 16, a sprocket two 18, and a maintenance and cleaning port 301; the track A 17 is placed on the bearings on both sides of the roller A 107, the track B 16 is placed on the bearings on both sides of the roller B 108, the high-temperature kettle driving motor drives the rotating high-temperature kettle 103 to rotate through the sprocket two 18, and the maintenance and cleaning port 301 is closed during operation;

[0028] Please refer to Figure 3 , Figure 4, the composite sealing device 104 includes a rotating cylinder 1, a fixed cylinder 2, a fixed flange 3, fixed adjusting bolts 4, a basic sealing ring 5, fastening bolts 6, a rotating sealing cavity 7, a rotating flange 8, rotating adjusting bolts 9, and an airtight sealing ring 10; the rotating cylinder 1 has a hollow cylinder with both ends open inside; the composite sealing device 104 is installed at the connection and mating part between the fixed cylinder 2 and the rotating cylinder 1; the fixed flange 3 is connected to the threaded holes at the right end of the fixed cylinder 2 through the fixed adjusting bolts 4 to adjust the tightness of the basic sealing ring 5; the basic sealing ring 5 is located in the cavity between the outer wall of the rotating cylinder 1 and the inner wall of the fixed cylinder 2 and is arranged along the central axis direction; the basic sealing ring 5 is in the shape of a ring, and the number is one or more; the rotating sealing cavity 7 is composed of two symmetrically hollow semi-cylinders, and threaded holes are evenly arranged in the circumferential direction at the left end; the right end of the rotating sealing cavity 7 is fixed on the rotating cylinder 1 through the fastening bolts 6; a composite sealing cavity is formed between the inner wall of the rotating sealing cavity 7 and the outer wall of the fixed cylinder 2, and the airtight sealing ring 10 is placed in the composite sealing cavity; the rotating adjusting bolts 9 connect the rotating flange 8 to the left end of the rotating sealing cavity 7 to adjust the tightness of the airtight sealing ring 10; the rotating sealing cavity 7 completely seals the cavity where the basic sealing ring 5 is located for the second time to form the composite sealing device 104 of the present invention. The composite sealing device 104 makes the air flow and lithium battery material powder inside the rotating cylinder 1 have a "reverse U-shaped" movement trajectory with the external environment. The resistance of the air flow inside the rotating cylinder 1 flowing to the outside increases. The lithium battery powder material fills the gaps at various parts inside the "reverse U-shaped" composite sealing device 104. The accumulated powdered lithium battery material directly participates in sealing and lubrication to form a virtuous cycle, so that not only the relative movement resistance between the rotating cylinder and the fixed cylinder is reduced, but also the sealing is tight. The composite sealing device of the equipment does not need to be shut down for maintenance for a long time, saves electric energy, reduces the labor intensity of workers, and improves production efficiency and product quality.

[0029] Please refer to Figure 6 , Figure 7 , Figure 8, is a stirring and pushing device 111 for a continuous production equipment of high-temperature reaction of lithium battery materials, including a bearing seat 11, a bearing 12, a cooling cavity 13, a first sprocket 14, a sealing ring 15, a blanking spiral 201, a reverse spiral 202, a forward spiral 203, a stirring fan blade 204, and a rotating shaft 205; the bearing 12 is placed inside the bearing seat 11, the bearing seat 11 is connected to the end of the cooling cavity 13, the cooling cavity 13 is respectively connected to the ends of the feeding device 101 and the fixed cylinder 2, both ends of the rotating shaft 205 pass through the bearing 12, the sealing ring 15 is placed between the bearing seat 11 and the cooling cavity 13, the first sprocket 14 is fixed to the right end of the rotating shaft 205, the blanking spiral 201 is welded to the rotating shaft 205, the blade width of the reverse spiral 202 is smaller than that of the forward spiral 203 and the rotation directions are opposite, and both are welded to the rotating shaft 205. Driven by the forward spiral 203 and the reverse spiral 202, the lithium battery materials move forward and backward alternately inside the rotating cylinder 1. The lithium battery materials move a short distance in a long time, so that the length of the rotating high-temperature kettle 103 can be 1 / 3 to 1 / 5 of the original technology, and continuous feeding and discharging of the lithium battery materials in the rotating high-temperature kettle 103 for 4-8 hours can be realized. The lengths of the rotating high-temperature kettle 103 and the rotating shaft 205 are reduced, the stiffness is increased, the high-temperature deformation is reduced, the stability is increased, the material selection is relaxed, and the cost is reduced; by adjusting the rotation speeds of the rotating cylinder 1 and the stirring and pushing device 111, the continuous feeding and discharging of the lithium battery materials in the rotating high-temperature kettle 103 for 4-8 hours are controlled; the stirring fan blade 204 is welded to the rotating shaft 205, and the stirring fan blade 204 evenly stirs the lithium battery materials on the inner wall and the center line of the rotating cylinder 1, so that harmful impurities volatilize sufficiently, and the quality of the lithium battery materials is improved.

Claims

1. A continuous production device for high-temperature reaction of lithium battery materials, characterized in that, It includes a feeding device (101), a shell electric furnace (102), a rotating high-temperature kettle (103), a composite sealing device (104), a fixed cylinder (2), a base (106), a supporting roller A (107), a supporting roller B (108), a high-temperature kettle driving motor (109), a stirring and pushing device driving motor (110), and a stirring and pushing device (111); The composite sealing device (104) includes a rotating cylinder (1), a fixed cylinder (2), a fixed flange (3), fixed adjusting bolts (4), a basic sealing ring (5), fastening bolts (6), a rotating sealing cavity (7), a rotating flange (8), rotating adjusting bolts (9), and an airtight sealing ring (10); The rotating cylinder (1) has a cavity inside which is a cylinder with both ends open; an annular cavity at the connection and mating part between the inner wall of the fixed cylinder (2) and the outer wall of the rotating cylinder (1) is provided with a basic sealing ring (5); the fixed flange (3) is connected to the threaded holes at the right end of the fixed cylinder (2) through the fixed adjusting bolts (4) to adjust the tightness of the basic sealing ring (5); the basic sealing ring (5) is arranged along the central axis direction in the basic sealing cavity between the rotating cylinder (1) and the fixed cylinder (2), and the number is one or more; the rotating sealing cavity (7) is composed of two symmetrical semi-cylinders, the left end is evenly provided with threaded holes in the circumferential direction, and the right end is fixed on the rotating cylinder (1) through the fastening bolts (6); a gap between the inner wall of the rotating sealing cavity (7) and the outer wall of the fixed cylinder (2) forms a composite sealing cavity, and the airtight sealing ring (10) is placed in the composite sealing cavity; the rotating adjusting bolts (9) connect the rotating flange (8) to the left end of the rotating sealing cavity (7) to adjust the airtight sealing ring (10); the rotating sealing cavity (7) secondarily seals the entire cavity where the basic sealing ring (5) is located.

2. The continuous production equipment for high-temperature reaction of a lithium battery material according to claim 1, characterized in that The feeding device (101) pours the lithium battery materials in the silo into the rotating high-temperature kettle (103), and through the stirring and pushing of the stirring and pushing device (111), it is conveyed to the fixed cylinder (2) for continuous feeding and discharging.

3. The continuous production equipment for high-temperature reaction of a lithium battery material according to claim 1, characterized in that The rotating high-temperature kettle (103) is placed inside the shell electric furnace (102), and the rotating high-temperature kettle (103) includes a rotating cylinder (1), a track A (17), a track B (16), a sprocket two (18), and a maintenance and cleaning port (301).

4. A continuous production device for high-temperature reaction of a lithium battery material according to claim 3, characterized in that, The track A (17) is placed on the supporting roller A (107), the track B (16) is placed on the supporting roller B (108), the high-temperature kettle driving motor drives the rotating high-temperature kettle (103) to rotate through the sprocket two (18), and the maintenance and cleaning port (301) is closed during operation.

5. The continuous production equipment for high-temperature reaction of a lithium battery material according to claim 1, wherein, The stirring and pushing device (111) includes a bearing seat (11), a bearing (12), a cooling cavity (13), a sprocket one (14), a sealing ring (15), a blanking spiral (201), a reverse spiral (202), a forward spiral (203), stirring fan blades (204), and a rotating shaft (205).

6. The continuous production equipment for high-temperature reaction of a lithium battery material according to claim 5, characterized in that, The bearing (12) is placed inside the bearing housing (11). The bearing housing (11) is connected to the end of the cooling chamber (13). The cooling chamber (13) is respectively connected to the ends of the feeding device (101) and the fixed cylinder (2). The bearings (12) are installed at both ends of the rotating shaft (205). The sealing ring (15) is placed between the bearing housing (11) and the cooling chamber (13). The first sprocket (14) is installed at the end of the rotating shaft (205). The blanking screw (201) is welded to the rotating shaft (205). The blade width of the reverse screw (202) is smaller than that of the forward screw (203) and their rotation directions are opposite. The reverse screw (202), the forward screw (203) and the stirring fan blades (204) are respectively welded to the rotating shaft (205).

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