Sealing Structure and Continuous Reaction Processing Equipment for Graphite Anode Materials / Phosphate and Ternary Cathode Materials of Lithium-Ion Batteries

Abstract

The sealing structure of the present invention and the continuous reaction treatment equipment for graphite-based anode materials / phosphates and ternary cathode materials of lithium-ion batteries. The sealing structure includes sealing devices arranged at each main air leakage point of the rotary reactor. The sealing device includes a first solid sealing group, a gas sealing group, and a second solid sealing group arranged circumferentially along the rotary reactor. The first solid sealing group, the gas sealing group, and the second solid sealing group are arranged in sequence in the axial direction at the air leakage point and form an axial seal with each other. The coating carbonization / sintering equipment includes a feeding mechanism, a rotary reactor, and a discharging mechanism. The feeding mechanism and the discharging mechanism are docked at the corresponding feeding end and discharging end of the rotary reactor, and the above-mentioned sealing structure is provided at the docking positions of the rotary reactor with the feeding mechanism and the discharging mechanism. This equipment has the advantages of simple and reliable structure and good sealing performance.

Description

Technical Field

[0001] The present invention mainly relates to the field of preparing graphite-based anode materials for lithium-ion batteries, and particularly relates to a sealing structure and a continuous reaction treatment device for graphite-based anode materials / phosphates and ternary cathode materials of lithium-ion batteries. Background Art

[0002] During the coating carbonization process of pitch, a large amount of harmful aromatic gases are released. These gases are harmful to the human body and have a pungent smell. Therefore, the coating carbonization process of needle coke or natural graphite with pitch needs to be carried out under positive pressure to prevent external air from infiltrating into the reactor and causing an oxidation combustion reaction, which will disrupt the normal coating carbonization reaction process in the reactor. However, the problem is that since the reactor is a rotating cylinder, there are dynamic operation equipment sealing problems at the fixed ends of the head and tail of the equipment. If the seal is not tight, the harmful gases in the furnace will leak into the workshop, causing environmental pollution. This kind of organic compound gas containing aromatic hydrocarbons has a pungent smell and will damage the working environment of the workers in the production workshop. Therefore, it has become a very necessary and urgent issue to study an effective technical solution to solve this problem.

[0003] It is similar to the coating carbonization process of graphite-based anode materials for lithium-ion batteries. Currently, for cathode materials of lithium-ion batteries such as lithium iron phosphate, lithium nickel cobalt manganese oxide / lithium nickel cobalt aluminum oxide (NCM / NCA) ternary, high-temperature static sintering is also mostly used in pusher kilns or roller hearth kilns. The fully mixed raw materials are loaded into corundum-mullite ceramic crucibles and then enter the pusher kiln or roller hearth kiln for sintering. The temperature in the pre-sintering section is controlled below 600°C to complete the drainage, degassing, and coating work of the materials; the temperature in the high-temperature sintering section is controlled within the range of 600°C - 1000°C to complete the solid-phase sintering reaction of the cathode material precursor and lithium salt. During the sintering process, the ceramic crucibles absorb a large amount of heat, and the materials and crucibles need to be cooled at the discharge port, resulting in a large amount of heat loss. In addition, due to static sintering, heat transfer is limited, and relatively longer heat treatment residence time is required compared to dynamic sintering, resulting in higher overall energy consumption. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a sealing structure and a continuous reaction treatment device for graphite-based anode materials / phosphates and ternary cathode materials of lithium-ion batteries, which have a simple and reliable structure and good sealing performance.

[0005] To solve the above technical problem, the present invention adopts the following technical solutions:

[0006] A sealing structure includes sealing devices arranged at each main air leakage point of a rotary reactor. The sealing devices include a first solid sealing group, a gas sealing group, and a second solid sealing group arranged circumferentially along the rotary reactor. The first solid sealing group, the gas sealing group, and the second solid sealing group are arranged in sequence in the axial direction at the air leakage point and form an axial seal with each other.

[0007] As a further improvement of the above technical solution:

[0008] The first solid sealing group, the gas sealing group, and the second solid sealing group all form a radial seal for the rotary reactor.

[0009] The first solid sealing group includes a first static ring, a first elastic seal, and a first dynamic ring. The first elastic seal is press-fitted between the first static ring and the rotary reactor. The first dynamic ring is connected to the end of the first static ring and axially presses the first elastic seal. The gas sealing group is connected to the first dynamic ring.

[0010] The gas sealing group includes a second static ring. An inflation chamber with a gas pressure greater than the gas pressure inside the rotary reactor is formed between the second static ring and the rotary reactor. A gas filling pipe for filling a protective gas into the inflation chamber is installed on the second static ring. The second solid sealing group is connected to the second static ring.

[0011] The second solid sealing group includes a third static ring, a second elastic seal, and a pressing member. The third static ring is connected to the gas sealing group. The second elastic seal is press-fitted between the third static ring and the rotary reactor. The pressing member is installed on the third static ring and applies a radial pressure to the second elastic seal.

[0012] The second solid sealing group further includes a fourth static ring, a third elastic seal, and a second dynamic ring. The fourth static ring is connected to the third static ring. The third elastic seal is press-fitted between the fourth static ring and the rotary reactor. The second dynamic ring is connected to the end of the fourth static ring and axially presses the third elastic seal.

[0013] A continuous reaction treatment device for a lithium-ion battery graphite-based anode material / phosphate and ternary cathode material includes a feeding mechanism, a rotary reactor, and a discharging mechanism. The feeding mechanism and the discharging mechanism are docked at the corresponding feeding end and discharging end of the rotary reactor. The above-mentioned sealing structure is provided at the docking positions of the rotary reactor with the feeding mechanism and the discharging mechanism.

[0014] As a further improvement of the above technical solution:

[0015] The rotary reactor includes a reactor body and a regulator that can be adjusted radially relative to the reactor body. The regulator is arranged around the reactor body between the reactor body and the sealing structure, and the regulator can be radially pressed against the sealing structure through radial elastic adjustment.

[0016] One end of the regulator is fixedly connected to the outer wall of the reactor body, and the other end is elastically connected to the outer wall of the reactor body by arranging an adjustment support frame.

[0017] The rotary reactor includes a coating / presintering section connected to the feeding end and a carbonization / sintering section connected to the coating / presintering section to realize the sequential continuous transportation of reaction materials from the feeding end, through the coating / presintering section, the carbonization / sintering section to the discharging end. A first heating furnace for realizing the coating / presintering of reaction materials by heating is arranged outside the coating / presintering section of the rotary reactor, and a second heating furnace for realizing the carbonization / sintering of reaction materials by heating is arranged outside the carbonization / sintering section of the rotary reactor.

[0018] The rotary reactor is arranged obliquely, with the feeding end of the rotary reactor at a high position and the discharging end at a low position; the included angle between the axis of the rotary reactor and the horizontal line is a, and 0° < a ≤ 10°.

[0019] Compared with the prior art, the advantages of the present invention are as follows:

[0020] For the sealing structure of the present invention, in this structure, there will be a rotating gap at the docking position between the rotary reactor and the fixing part at its end. The first solid seal group forms a seal for the rotary reactor to prevent the leakage of harmful gases; further, a protective gas is introduced through the gas seal group. On the one hand, the air pressure of the gas seal group is greater than the air pressure inside the rotary reactor to form a further positive pressure seal. On the other hand, if the protective gas enters the rotary reactor, it can provide a protective gas for the rotary reactor, further improving the reaction efficiency; and the second solid seal group further forms a seal for the rotary reactor, which is equivalent to forming a third-stage seal to further prevent the leakage of protective nitrogen. The overall structure is simple and reliable, and the sealing performance is good. The continuous reaction treatment equipment for lithium-ion battery graphite-based anode materials / phosphates and ternary cathode materials of the present invention is provided with the above-mentioned sealing structure, so it has the corresponding technical effects of the above-mentioned sealing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the sealing structure of the present invention.

[0022] Figure 2 is a schematic structural diagram of the continuous reaction treatment equipment for lithium-ion battery graphite-based anode materials / phosphates and ternary cathode materials of the present invention.

[0023] Figure 3 isFigure 2 Schematic enlarged view of part A.

[0024] Each label in the figure represents:

[0025] 1. Feed mechanism; 2. Rotary reactor; 21. Reactor body; 211. Lower adjusting plate; 212. Adjusting support frame; 22. Regulator; 221. Upper adjusting plate; 23. Rotary driving member; 231. Driving support seat; 232. Driving motor; 233. Reducer; 234. Driving wheel; 235. Transmission wheel; 3. Discharge mechanism; 4. Sealing device; 41. First solid seal group; 411. First static ring; 412. First elastic seal; 413. First dynamic ring; 42. Gas seal group; 421. Second static ring; 422. Inflatable cavity; 423. Inflation pipe; 43. Second solid seal group; 431. Third static ring; 432. Second elastic seal; 433. Pushing member; 434. Fourth static ring; 435. Third elastic seal; 436. Second dynamic ring; 5. First heating furnace; 51. First furnace body; 52. First heating element; 6. Second heating furnace; 61. Second furnace body; 62. Second heating element; 7. Support device; 71. Roller seat; 72. Support wheel. Detailed implementation mode

[0026] The present invention will be further described in detail below with reference to the accompanying drawings of the specification and specific embodiments.

[0027] As Figure 1 shown, an embodiment of the sealing structure of the present invention includes a sealing device 4 provided at each main air leakage point of the rotary reactor 2. The sealing device 4 includes a first solid seal group 41, a gas seal group 42, and a second solid seal group 43 arranged circumferentially along the rotary reactor 2. The first solid seal group 41, the gas seal group 42, and the second solid seal group 43 are arranged in sequence in the axial direction at the air leakage point and form an axial seal with each other. In this structure, there is a rotational gap at the docking position between the rotary reactor 2 and the fixed part at its end. The first solid seal group 41 seals the rotary reactor 2 to prevent harmful gas leakage; further, a protective gas is introduced through the gas seal group 42. On the one hand, the air pressure of the gas seal group 42 is greater than the air pressure inside the rotary reactor 2 to form a further positive pressure seal. On the other hand, if the protective gas enters the rotary reactor 2, it can provide a protective gas for the rotary reactor 2, further improving the reaction efficiency; and the second solid seal group 43 further seals the rotary reactor 2, which is equivalent to forming a third-stage seal, further preventing the leakage of protective nitrogen. The overall structure is simple and reliable, and the sealing performance is good.

[0028] In this embodiment, the first solid seal group 41, the gas seal group 42, and the second solid seal group 43 all form radial seals for the rotary reactor 2. Through double seals in the axial and radial directions, the sealing performance is greatly improved.

[0029] In this embodiment, the first solid seal group 41 includes a first stationary ring 411, a first elastic seal 412, and a first moving ring 413. The first elastic seal 412 is press-fitted between the first stationary ring 411 and the rotary reactor 2. The first moving ring 413 is connected to the end of the first stationary ring 411 and axially presses the first elastic seal 412. The gas seal group 42 is connected to the first moving ring 413. In this structure, the first elastic seal 412 is composed of asbestos packing to form a soft high-temperature resistant sealing material. The first moving ring 413 axially presses the first elastic seal 412, causing the first elastic seal 412 to expand radially, thereby realizing the radial sealing of the rotary reactor 2 by the first elastic seal 412.

[0030] In this embodiment, the gas seal group 42 includes a second stationary ring 421. An inflation chamber 422 with a gas pressure greater than the gas pressure inside the rotary reactor 2 is formed between the second stationary ring 421 and the rotary reactor 2. A gas charging pipe 423 for charging protective gas into the inflation chamber 422 is installed on the second stationary ring 421. The second solid seal group 43 is connected to the second stationary ring 421. In this structure, nitrogen is charged through the gas charging pipe 423 to make the gas pressure in the inflation chamber 422 greater than the gas pressure inside the rotary reactor 2, forming a further positive pressure seal.

[0031] In this embodiment, the second solid seal group 43 includes a third stationary ring 431, a second elastic seal 432, and a pressing member 433. The third stationary ring 431 is connected to the gas seal group 42. The second elastic seal 432 is press-fitted between the third stationary ring 431 and the rotary reactor 2. The pressing member 433 is installed on the third stationary ring 431 and applies a radial pressure to the second elastic seal 432. In this structure, the second elastic seal 432 is composed of asbestos packing to form a soft high-temperature resistant sealing material. The pressing member 433 radially presses the second elastic seal 432, making the second elastic seal 432 radially seal the rotary reactor 2.

[0032] In this embodiment, the second solid seal group 43 further includes a fourth static seal ring 434, a third elastic seal 435 and a second dynamic seal ring 436. The fourth static seal ring 434 is connected to the third static seal ring 431. The third elastic seal 435 is press-fitted between the fourth static seal ring 434 and the rotary reactor 2. The second dynamic seal ring 436 is connected to the end of the fourth static seal ring 434 and axially presses the third elastic seal 435. In this structure, the third elastic seal 435 is made of asbestos packing to form a soft high-temperature resistant sealing material. The second dynamic seal ring 436 axially presses the third elastic seal 435, causing the third elastic seal 435 to expand radially, thereby realizing the radial sealing of the rotary reactor 2 by the third elastic seal 435.

[0033] As Figure 2 and Figure 3 shown, an embodiment of the continuous reaction treatment equipment for graphite-based anode materials / phosphates and ternary cathode materials of lithium-ion batteries according to the present invention includes a feeding mechanism 1, a rotary reactor 2 and a discharging mechanism 3. The feeding mechanism 1 and the discharging mechanism 3 are docked at the corresponding feeding end and discharging end of the rotary reactor 2. The sealing structures described above are provided at the docking positions of the rotary reactor 2 with the feeding mechanism 1 and the discharging mechanism 3. In this structure, there is a relative movement relationship between the rotary reactor 2 and the feeding mechanism 1 and the discharging mechanism 3. Therefore, there will be a rotary gap at the docking positions of the rotary reactor 2 with the feeding mechanism 1 and the discharging mechanism 3. The first solid seal group 41 seals the rotary reactor 2 to prevent the leakage of protective nitrogen. Further, a protective gas is introduced through the gas seal group 42. On the one hand, the air pressure of the gas seal group 42 is greater than the air pressure inside the rotary reactor 2 to form a further positive pressure seal. On the other hand, if the protective gas enters the rotary reactor 2, it can provide a protective gas for the rotary reactor 2, further improving the reaction efficiency. The second solid seal group 43 further seals the rotary reactor 2, which is equivalent to forming a third-level seal, further preventing the leakage of protective nitrogen. The overall structure is simple and reliable, and the sealing performance is good.

[0034] In this embodiment, the rotary reactor 2 includes a reactor body 21 and a regulator 22 that can be radially adjusted relative to the reactor body 21. The regulator 22 is arranged around the reactor body 21 between the reactor body 21 and the sealing structure. The regulator 22 can achieve radial pressing against the sealing structure through radial elastic adjustment. In this structure, on the one hand, the regulator 22 separates the reactor body 21 from the first solid seal group 41, the gas seal group 42, and the second solid seal group 43 by a certain distance to form a heat insulation cavity, preventing the first solid seal group 41 and the second solid seal group 43 from being directly heated, improving the service life of the first solid seal group 41 and the second solid seal group 43, and at the same time ensuring the sealing effect. Further, the regulator 22 can be radially adjusted relative to the reactor body 21 to ensure that all positions of the regulator 22 are radially sealed with the first solid seal group 41, the gas seal group 42, and the second solid seal group 43.

[0035] In this embodiment, one end of the regulator 22 is fixedly connected to the outer wall of the reactor body 21, and the other end is elastically connected to the outer wall of the reactor body 21 by arranging an adjustment support frame 212. An upper adjustment plate 221 is fixedly provided on the inner wall of the regulator 22 near one end of the docking portion, and a lower adjustment plate 211 is fixedly provided on the outer wall of the reactor body 21 at the corresponding position. An adjustment support frame 212 is fixedly provided on the outer wall of the other end of the reactor body 21. When the adjustment support frame 212 pushes the regulator 22 to the corresponding radial position, the upper adjustment plate 221 and the lower adjustment plate 211 are fixedly connected. In this structure, during adjustment, first use the adjustment support frame 212 to push the regulator 22 to the corresponding radial position, and then fixedly connect the upper adjustment plate 221 and the lower adjustment plate 211 to form a seal, and its structure is simple and reliable.

[0036] In this embodiment, the rotary reactor 2 includes a coating / presintering section connected to the feed end and a carbonization section connected to the coating / sintering section to achieve the sequential continuous conveyance of the reaction materials from the feed end, through the coating / presintering section, the carbonization / sintering section, to the discharge end. A first heating furnace 5 for heating to achieve the coating / presintering of the reaction materials is arranged outside the coating / presintering section of the rotary reactor 2, and a second heating furnace 6 for heating to achieve the carbonization / sintering of the reaction materials is arranged outside the carbonization section of the rotary reactor 2. During operation, first start the rotary reactor 2 to make it rotate; then start the first heating furnace 5 and the second heating furnace 6 to make the body of the corresponding section reach the corresponding preset temperature zone; then start the feeding mechanism 1 to make the needle coke and pitch mixed in a certain proportion enter the rotary reactor 2 through the feeding mechanism 1; finally start the discharging mechanism 3 to output the materials that have completed coating and carbonization from the discharging mechanism 3. Compared with the traditional structure, this equipment realizes the continuity of the coating / presintering of the graphite-based anode material of the lithium-ion battery, the presintering of the cathode material, the carbonization of the anode material, the sintering of the cathode material, and the cooling process through the integrated rotary reactor 2, ensures the consistency of the products, significantly improves the product quality, replaces the current coating reaction kettle for the anode material + cooling kettle for cooling + roller hearth kiln or pusher kiln for carbonization + water indirect cooling equipment and the box furnace for the cathode material + roller hearth kiln or pusher kiln for carbonization + water indirect cooling equipment, greatly simplifies the process flow, the labor intensity of the operators and the number of workers, and the energy consumption per ton of products is also greatly reduced, significantly reducing the equipment investment, labor costs and energy consumption costs, and enabling the large-scale of the equipment; at the same time, it is easy to realize computer automatic control, greatly reducing the production cost.

[0037] In this embodiment, the rotary reactor 2 is arranged obliquely, with the feed end of the rotary reactor 2 at a high position and the discharge end at a low position; the angle between the axis of the rotary reactor 2 and the horizontal line is a, where 0° < a ≤ 10°. Such a setting enables the materials to be continuously conveyed towards the discharge end under the action of their own gravity and the rotational force of the rotary reactor 2, improving the efficiency. Specifically, it is set to 7°.

[0038] In this embodiment, both the first heating furnace 5 and the second heating furnace 6 are arranged coaxially with the rotary reactor 2. Such a setting ensures that the distances between the first heating furnace 5 and the second heating furnace 6 and all positions in the circumferential direction of the rotary reactor 2 are the same, that is, it ensures the thermal uniformity of the corresponding temperature zones of the rotary reactor 2.

[0039] In this embodiment, the first heating furnace 5 and the second heating furnace 6 are arranged at intervals along the rotary reactor 2. Such a setting facilitates the temperature arrangement and regulation in each temperature zone and reduces the mutual influence.

[0040] In this embodiment, a support device 7 for supporting the corresponding positions of the rotary reactor 2 is installed at intervals around the rotary reactor 2. Since the rotary reactor 2 is a continuous integral structure with a relatively long length, the support device 7 is arranged at each interval, which facilitates the support of the rotary reactor 2 and improves the stability of the equipment.

[0041] In this embodiment, the support device 7 includes a roller seat 71 and a support wheel 72. The support wheel 72 is fixed on the rotary reactor 2, and the roller seat 71 is fixed on the ground and contacts the support wheel 72. While supporting the rotary reactor 2, it can also ensure the normal rotation function of the rotary reactor 2.

[0042] In this embodiment, the rotary reactor 2 further includes a rotary driving member 23. The rotary driving member 23 is arranged outside the reactor body 21 and drives the reactor body 21 to rotate. In this structure, the reactor body 21 is driven to rotate by the rotary driving member 23, and its structure is simple and reliable.

[0043] In this embodiment, the rotary driving member 23 includes a driving support base 231, a driving motor 232, a speed reducer 233, a driving wheel 234 and a transmission wheel 235. The driving support base 231 is fixed on the ground, the driving wheel 234 is installed on the driving support base 231, the transmission wheel 235 is fixed on the reactor body 21 and connected to the driving wheel 234. The driving motor 232 drives the driving wheel 234 to rotate through the speed reducer 233, and then drives the reactor body 21 to rotate through the transmission wheel 235.

[0044] In this embodiment, the first heating furnace 5 includes a first furnace body 51 and a first heating element 52 installed on the first furnace body 51 and extending into its interior. The first furnace body 51 is arranged outside the rotary reactor 2; the second heating furnace 6 includes a second furnace body 61 and a second heating element 62 installed on the second furnace body 61 and extending into its interior. The second furnace body 61 is arranged outside the rotary reactor 2. In this structure, the designed temperature of the first heating furnace 5 is 0 - 650 °C, and the heating method can be an electric heating element (the first heating element 52), burning fuel oil, burning producer gas and burning natural gas. In order to ensure the uniformity of the temperature field, the burner for burning fuel can adopt a radiant burner. The task of the first stage is mainly to complete the coating and partial carbonization of the carbonaceous raw material by asphalt; the designed temperature of the second heating furnace 6 is 450 °C - 1100 °C, and the heating method can be an electric heating element (the second heating element 62), burning fuel oil, burning producer gas and burning natural gas. In order to reduce energy consumption, the burner for burning fuel can adopt a regenerative burner. The task of the second stage is mainly to complete the carbonization of the coated asphalt.

[0045] In other embodiments, the device can also be used for the continuous high-temperature sintering of the lithium iron phosphate cathode material of lithium-ion batteries. Similarly, its rotary reactor 2 includes a pre-sintering section connected to the feed end and a carbonization section connected to the pre-sintering section to achieve the sequential continuous conveyance of the reaction materials from the feed end, pre-sintering section, sintering section to the discharge end. A first heating furnace 5 for pre-sintering the reaction materials by heating is arranged outside the pre-sintering section of the rotary reactor 2, and a second heating furnace 6 for sintering the reaction materials by heating is arranged outside the sintering section of the rotary reactor 2. During operation, first start the rotary reactor 2 to make the rotary reactor 2 rotate; then start the first heating furnace 5 and the second heating furnace 6 to make the body of the corresponding section reach the corresponding preset temperature zone; then start the feeding mechanism 1 to make the precursor and lithium salt mixed in a certain proportion enter the rotary reactor 2 through the feeding mechanism 1; finally start the discharging mechanism 3 to output the materials that have completed high-temperature sintering from the discharging mechanism 3. Compared with the traditional structure, this device realizes the continuity of the coating high-temperature firing and cooling processes of the lithium iron phosphate cathode material of lithium-ion batteries through the integrated rotary reactor 2, ensures the consistency of the products, and significantly improves the product quality; replaces the current box furnace + roller hearth kiln or pusher kiln sintering equipment, greatly simplifies the process flow, the labor intensity of the operators and the number of workers, and the energy consumption per ton of products is also greatly reduced, significantly reducing the equipment investment, labor costs and energy consumption costs, and can realize the large-scale of the equipment; at the same time, it is easy to realize computer automatic control, greatly reducing the production cost.

[0046] In other embodiments, the device can also be used for the continuous high-temperature sintering of the ternary cathode material lithium nickel cobalt manganate for lithium-ion batteries. Similarly, its rotary reactor 2 includes a pre-sintering section connected to the feed end and a carbonization section connected to the pre-sintering section to achieve the sequential continuous conveyance of the reaction materials from the feed end, pre-sintering section, sintering section to the discharge end. A first heating furnace 5 for pre-sintering the reaction materials by heating is arranged outside the coated section of the rotary reactor 2, and a second heating furnace 6 for sintering the reaction materials by heating is arranged outside the sintering section of the rotary reactor 2. During operation, first start the rotary reactor 2 to make the rotary reactor 2 rotate; then start the first heating furnace 5 and the second heating furnace 6 to make the body of the corresponding section reach the corresponding preset temperature zone; then start the feeding mechanism 1 to make the ternary precursor and lithium salt mixed in a certain proportion enter the rotary reactor 2 through the feeding mechanism 1; finally start the discharging mechanism 3 to output the materials that have completed high-temperature sintering from the discharging mechanism 3. Compared with the traditional structure, this device realizes the continuity of the pre-sintering, high-temperature firing and cooling processes of the lithium nickel cobalt manganate cathode material for lithium-ion batteries through the integrated rotary reactor 2, ensures the consistency of the products, and significantly improves the product quality; replaces the current roller hearth kiln or pusher kiln sintering equipment, greatly simplifies the process flow, the labor intensity of the operators and the number of workers, and the energy consumption per ton of products is also greatly reduced, significantly reducing the equipment investment, labor costs and energy consumption costs, and can realize the large-scale of the equipment; at the same time, it is easy to realize computer automatic control, greatly reducing the production cost.

[0047] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of the protection of the technical solution of the present invention.

Claims

1. A continuous reaction treatment device for a graphite-based anode material / phosphate and a ternary cathode material of a lithium-ion battery, characterized in that: It includes a feeding mechanism (1), a rotating reactor (2) and a discharging mechanism (3). The feeding mechanism (1) and the discharging mechanism (3) are docked at the corresponding feeding end and discharging end of the rotating reactor (2), and sealing structures are provided at the docking positions of the rotating reactor (2) with the feeding mechanism (1) and the discharging mechanism (3); the sealing structure includes a sealing device (4) provided at each main air leakage point of the rotating reactor (2), and the sealing device (4) includes a first solid sealing group (41), a gas sealing group (42) and a second solid sealing group (43) arranged circumferentially along the rotating reactor (2). The first solid sealing group (41), the gas sealing group (42) and the second solid sealing group (43) are arranged in sequence in the axial direction at the air leakage point and form axial sealing with each other. The rotating reactor (2) includes a reactor body (21) and a regulator (22) that can be adjusted radially relative to the reactor body (21). The regulator (22) is arranged peripherally along the reactor body (21) between the reactor body (21) and the sealing structure, and the regulator (22) can be radially pressed against the sealing structure through radial elastic adjustment.

2. The continuous reaction treatment equipment for graphite-based anode materials / phosphates and ternary cathode materials of lithium-ion batteries according to claim 1, characterized in that: The first solid sealing group (41), the gas sealing group (42) and the second solid sealing group (43) all form radial sealing for the rotating reactor (2).

3. The continuous reaction treatment equipment for graphite-based anode materials / phosphates and ternary cathode materials of lithium-ion batteries according to claim 1, characterized in that: The first solid sealing group (41) includes a first static ring (411), a first elastic sealing member (412) and a first dynamic ring (413). The first elastic sealing member (412) is press-fitted between the first static ring (411) and the rotating reactor (2), and the first dynamic ring (413) is connected to the end of the first static ring (411) and axially presses the first elastic sealing member (412). The gas sealing group (42) is connected to the first dynamic ring (413).

4. The continuous reaction treatment equipment for graphite-based anode materials / phosphates and ternary cathode materials of lithium-ion batteries according to claim 1, wherein: The gas sealing group (42) includes a second static ring (421). An inflation chamber (422) with a gas pressure greater than the gas pressure inside the rotating reactor (2) is formed between the second static ring (421) and the rotating reactor (2). A gas charging pipe (423) for charging protective gas into the inflation chamber (422) is installed on the second static ring (421), and the second solid sealing group (43) is connected to the second static ring (421).

5. The continuous reaction treatment equipment for graphite-based anode materials / phosphates and ternary cathode materials of lithium-ion batteries according to claim 1, characterized in that: The second solid sealing group (43) includes a third static ring (431), a second elastic sealing member (432) and a pressing member (433). The third static ring (431) is connected to the gas sealing group (42). The second elastic sealing member (432) is press-fitted between the third static ring (431) and the rotating reactor (2), and the pressing member (433) is installed on the third static ring (431) and applies radial pressure to the second elastic sealing member (432).

6. The continuous reaction treatment equipment for graphite-based anode materials / phosphates and ternary cathode materials of lithium-ion batteries according to claim 5, characterized in that: The second solid seal group (43) further includes a fourth static ring (434), a third elastic seal (435), and a second dynamic ring (436). The fourth static ring (434) is connected to the third static ring (431). The third elastic seal (435) is press-fitted between the fourth static ring (434) and the rotary reactor (2). The second dynamic ring (436) is connected to the end of the fourth static ring (434) and axially presses the third elastic seal (435).

7. The continuous reaction treatment equipment for graphite-based anode materials / phosphates and ternary cathode materials of lithium-ion batteries according to claim 1, characterized in that: One end of the regulator (22) is fixedly connected to the outer wall of the reactor body (21), and the other end is elastically connected to the outer wall of the reactor body (21) by arranging an adjustment support frame (212).

8. The continuous reaction treatment equipment for lithium-ion battery graphite-based anode materials / phosphates and ternary cathode materials according to any one of claims 1 to 7, characterized in that: The rotary reactor (2) includes a graphite-based anode material coating / pre-sintering section connected to the feed end and a graphite anode material carbonization / cathode material sintering section connected to the coating / pre-sintering section to realize the sequential continuous transportation of reaction materials from the feed end, the coating / pre-sintering section, the carbonization / sintering section to the discharge end. A first heating furnace (5) for heating to realize the coating / pre-sintering of reaction materials is arranged outside the coating section of the rotary reactor (2). A second heating furnace (6) for heating to realize the carbonization / sintering of reaction materials is arranged outside the carbonization / sintering section of the rotary reactor (2).

9. The continuous reaction treatment equipment for graphite-based anode materials / phosphates and ternary cathode materials of lithium-ion batteries according to claim 8, characterized in that: The rotary reactor (2) is arranged obliquely, with the feed end of the rotary reactor (2) at a high position and the discharge end of the rotary reactor (2) at a low position. The angle between the axis of the rotary reactor (2) and the horizontal line is a, where 0° < a ≤ 10°.

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