Graphite negative electrode material reaction kettle granulation device

Abstract

The present application relates to the technical field of graphite negative electrode material granulation, and particularly relates to a graphite negative electrode material reaction kettle granulation device, which comprises a kettle body, a stirring shaft, a heat source and a cyclone separator, the cyclone separator is vertically arranged on the kettle body and is communicated with the kettle body at the bottom, a coke powder feeding port and a pitch powder feeding port are arranged on the cyclone separator, the coke powder feeding port is communicated with the cyclone separator and is used for guiding the coke powder into the cyclone separator along the tangential direction, the coke powder has a first preset temperature, and the first preset temperature is the melting temperature of the pitch powder; the pitch powder feeding port is communicated with the cyclone separator and is located below the coke powder feeding port and is used for guiding the pitch powder into the cyclone separator, the pitch powder has a second preset temperature, and the second preset temperature is less than the first preset temperature. Thus, the structural characteristics of the cyclone separator are utilized to make the coke powder form a spiral trajectory, and the particles of the coke powder are separated under the joint action of gravity and centrifugal force, so that the agglomeration of the coke powder is reduced.

Description

Technical Field

[0001] This invention relates to the field of graphite anode material granulation technology, and in particular to a graphite anode material reactor granulation device. Background Technology

[0002] In the negative electrode material system of energy storage devices such as lithium-ion batteries, graphite is widely used due to its abundant resources, low price, high reversible capacity, low charge-discharge voltage plateau, no voltage hysteresis, and excellent conductivity.

[0003] In the production of graphite anode materials, coke powder and pitch powder are key raw materials. The former affects the porosity and ion transport of the material, while the latter plays a binding and coating role. The two are mixed in proportion and sent into a high-temperature reactor. The pitch powder melts and wets the coke powder, and then cools and solidifies to form a coating layer. The bonding particles constitute the basic structural unit of the graphite anode material.

[0004] In related technologies, such as Chinese patent CN221016022U, a graphite anode material granulation and coating reactor is disclosed. By introducing a motor-driven rotating rod and a fan-cooling temperature regulation system, the problems of feed pipe blockage and temperature regulation difficulty are solved, thus improving granulation efficiency.

[0005] However, in the existing method of manufacturing graphite anode materials through granulation and coating reactors, coke powder tends to agglomerate, making it difficult for asphalt powder to be uniformly coated on the coke particles, thus affecting the molding quality of the graphite anode materials. Summary of the Invention

[0006] Therefore, it is necessary to provide a reaction vessel granulation device for graphite anode materials to address the problem of poor molding quality in the current graphite anode material granulation process.

[0007] The above objectives are achieved through the following technical solutions:

[0008] A granulation apparatus for graphite anode material reaction vessel, comprising:

[0009] A vertically oriented vessel;

[0010] The stirring shaft is vertically inserted into the reactor body and can rotate around its own axis; the stirring shaft is equipped with stirring blades, which are configured to stir the coke powder and asphalt powder.

[0011] The heat source is configured to provide heat to the vessel body;

[0012] A cyclone separator is vertically mounted on the vessel body, with its bottom connected to the vessel body. The cyclone separator has a coke powder inlet and an asphalt powder inlet. The coke powder inlet is connected to the cyclone separator and configured to guide the coke powder tangentially into the cyclone separator. The coke powder has a first preset temperature, which is the melting temperature of the asphalt powder. The asphalt powder inlet is connected to the cyclone separator and located below the coke powder inlet. It is configured to guide the asphalt powder into the cyclone separator. The asphalt powder has a second preset temperature, which is lower than the first preset temperature.

[0013] Furthermore, the granulation device for the graphite anode material reactor also includes a coke powder feed pipe, an asphalt powder feed pipe, and a three-way pipe. The coke powder feed pipe is installed on the cyclone separator and connected to the coke powder inlet, and is configured to receive coke powder from the outside. The asphalt powder feed pipe is installed on the cyclone separator and connected to the asphalt powder inlet, and is configured to receive asphalt powder from the outside. The three-way pipe is connected to the top of the cyclone separator, the coke powder feed pipe, and the asphalt powder feed pipe, forming a closed flow path. A filter structure is installed at the connection between the coke powder feed pipe and the three-way pipe, and the filter structure is configured to filter asphalt powder.

[0014] Furthermore, the filter structure is a filter plate with multiple filter holes.

[0015] Furthermore, both the coke powder feed pipe and the asphalt powder feed pipe are set horizontally, and the height of the coke powder feed pipe is higher than that of the asphalt powder feed pipe; the filter plate is set at an angle toward the coke powder feed pipe.

[0016] Furthermore, there are multiple asphalt powder inlets, arranged circumferentially.

[0017] Furthermore, the direction of the asphalt powder inlet is eccentrically set.

[0018] Furthermore, the graphite anode material reactor granulation device also includes two feeding components, which are configured to provide driving force for coke powder and asphalt powder to be introduced into the cyclone separator, respectively.

[0019] Furthermore, the feeding component is a blower.

[0020] Furthermore, the blower has a heating element configured to heat coke powder to a first preset temperature or asphalt powder to a second preset temperature.

[0021] Furthermore, the graphite anode material reactor granulation device also includes a drive assembly configured to provide driving force for the rotation of the stirring shaft.

[0022] The beneficial effects of this invention are:

[0023] This invention relates to a granulation device for a graphite anode material reactor. By incorporating a cyclone separator and utilizing its structural characteristics, coke powder forms a spiral trajectory within the separator. Under the combined action of gravity and centrifugal force, the coke powder particles are separated, reducing agglomeration. Simultaneously, the coke powder is used as a heat source, causing the asphalt powder impacting its surface to absorb heat and melt, thereby achieving uniform coating. This improves the forming quality of the graphite anode material and ensures a low outer temperature of the coated asphalt powder, resulting in low viscosity of the melted asphalt powder. This reduces the probability of adhesion of other coke powder and asphalt powder, and to a certain extent, prevents agglomeration.

[0024] Furthermore, by setting up coke powder feed pipe, asphalt powder feed pipe and tee pipe, and utilizing the connectivity of the tee pipe to form a closed flow path, the asphalt powder that has not come into contact with the coke powder can be fed back into the cyclone separator. This not only enables the direct reuse of asphalt powder, but also reduces the energy required to heat the asphalt powder. Attached Figure Description

[0025] Figure 1 A three-dimensional structural schematic diagram of the granulation device for the reaction vessel of graphite anode material provided in an embodiment of the present invention;

[0026] Figure 2 This is a top view schematic diagram of the granulation device for the graphite anode material reactor provided in an embodiment of the present invention;

[0027] Figure 3 for Figure 2 A three-dimensional sectional view along the AA direction;

[0028] Figure 4 A three-dimensional structural diagram of the cyclone separator, coke powder feed pipe, asphalt powder feed pipe, hopper, tee pipe and blower of the graphite anode material reactor granulation device provided in the embodiments of the present invention during assembly.

[0029] Figure 5 A top view of the cyclone separator, coke powder feed pipe, asphalt powder feed pipe, hopper, tee pipe and blower of the graphite anode material reactor granulation device provided in the embodiments of the present invention during assembly.

[0030] Figure 6 for Figure 5 Sectional view along the BB direction;

[0031] Figure 7 A front view schematic diagram of the cyclone separator in the graphite anode material reactor granulation device provided in an embodiment of the present invention;

[0032] Figure 8 for Figure 7 Cross-sectional view along the CC direction;

[0033] Figure 9 A top view of the cyclone separator in the graphite anode material reactor granulation device provided in an embodiment of the present invention;

[0034] Figure 10 for Figure 9 Three-dimensional sectional view along the DD direction.

[0035] in:

[0036] 1. Vessel body; 101. Discharge port; 102. Jacket; 1021. Steam inlet; 1022. Condensate outlet; 103. First cavity;

[0037] 2. Stirring shaft; 201. Stirring blades;

[0038] 3. Cyclone separator; 301. Outer cylinder; 3011. Coke powder inlet; 3012. Asphalt powder inlet; 302. Inner tube; 303. Connecting sleeve; 304. Second cavity;

[0039] 4. Coke powder feed pipe;

[0040] 5. Asphalt powder feed pipe;

[0041] 6. T-joint;

[0042] 7. Filter plate;

[0043] 8. Blower;

[0044] 9. Drive assembly; 901. Drive motor; 902. Reducer; 903. Coupling;

[0045] 10. Hopper. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0047] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage," unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] The following reference Figures 1 to 10 The present invention describes a granulation apparatus for a graphite anode material reactor provided in an embodiment of the invention, which is particularly suitable for manufacturing graphite anode material particles.

[0050] Specifically, the graphite anode material reactor granulation device includes a reactor body 1 and a heat source. The reactor body 1 is a vertically placed cylindrical structure with a discharge port 101 at the bottom for discharging graphite anode material particles. A stirring shaft 2 is vertically inserted inside the reactor body 1 and can rotate around its own axis. Stirring blades 201 are provided on the stirring shaft 2 and are located inside the reactor body 1. When the stirring blades 201 are driven to rotate by the stirring shaft 2, they are used to stir the coke powder and asphalt powder inside the reactor body 1. The heat source is configured to provide heat to the reactor body 1 and can be set as hot steam.

[0051] To facilitate the heating of the vessel body 1 by hot steam, a jacket 102 is fixedly fitted onto the vessel body 1. The jacket 102 and the vessel body 1 are spaced apart, and an annular first cavity 103 is formed between them. A steam inlet 1021 is provided on the side wall of the jacket 102 near the top. The steam inlet 1021 is connected to the first cavity 103 and is used to receive hot steam. A condensate outlet 1022 is provided on the side wall of the jacket 102 near the bottom. The condensate outlet 1022 is connected to the first cavity 103 and is used to discharge the condensate formed after the hot steam and the vessel body 1 exchange heat.

[0052] To facilitate the provision of driving force for the rotation of the stirring shaft 2, the graphite anode material reactor granulation device is further configured to include a drive assembly 9. The drive assembly 9 is located on the top outer side of the reactor body 1 and includes a drive motor 901, a reducer 902, and a coupling 903 arranged sequentially from top to bottom. The motor shaft of the drive motor 901 is vertically downward and connected to the input end of the reducer 902. The output end of the reducer 902 is connected to the coupling 903. The top end of the stirring shaft 2 extends upward through the reactor body 1 and is connected to the coupling 903. Thus, the power output by the drive motor 901 can be transmitted to the stirring shaft 2 sequentially through the reducer 902 and the coupling 903 to drive the stirring shaft 2 to rotate, thereby facilitating the rotation of the stirring blades 201 via the stirring shaft 2.

[0053] During operation, coke powder and asphalt powder are first added to the reactor body 1. Then, hot steam is introduced into the first cavity 103 through the steam inlet 1021. The hot steam heats the reactor body 1, forming condensate, which is then discharged through the condensate outlet 1022. Next, the drive motor 901 is started. The drive motor 901 transmits its output power to the stirring shaft 2 through the reducer 902 and coupling 903, causing the stirring shaft 2 to rotate. As the stirring shaft 2 rotates, it drives the stirring blades 201 to rotate, simultaneously stirring the coke powder and asphalt powder. Under high temperature conditions, the asphalt powder gradually melts and coats the coke powder particles to form graphite anode material particles.

[0054] While the above process can achieve the manufacturing of graphite anode material particles, the coke powder is piled up and fed into the reactor 1. Since the coke powder particles themselves have a certain specific surface area and surface energy, there are intermolecular forces such as van der Waals attraction between the particles. When the coke powder particles are in a dry and dispersed state, these intermolecular forces will cause the particles to attract each other and gradually aggregate, forming agglomerates of different sizes. In addition, if the agglomerated coke powder particles cannot be fully dispersed during the mixing of coke powder and asphalt powder, the agglomeration phenomenon will be further aggravated.

[0055] The agglomeration of coke powder will have a serious impact on the subsequent asphalt powder coating process: when the agglomerated coke powder particles enter the high-temperature reactor 1, the melted asphalt powder can only coat the outer surface of the agglomerates, while the coke powder particles inside the agglomerates cannot fully contact the asphalt powder, resulting in the coating layer not being able to evenly cover all the coke powder particles.

[0056] This uneven coating state directly affects the molding quality of graphite anode materials. On the one hand, coke powder particles that are not fully coated are prone to falling off during subsequent pressing and sintering, resulting in a loose electrode structure and affecting the mechanical strength of the electrode. On the other hand, due to the lack of the binding effect of the asphalt coating layer, a large number of irregular pores will be formed inside the agglomerates. These pores will not only reduce the density of the electrode, but may also obstruct the lithium-ion transport path during charging and discharging, affecting the rate performance and cycle life of the battery, and ultimately restricting the improvement of the overall performance of graphite anode materials.

[0057] Based on this, the graphite anode material reactor granulation device provided in the embodiment of the present invention is further configured to include a cyclone separator 3. The cyclone separator 3 includes an outer cylinder 301 and an inner tube 302 arranged coaxially. The outer cylinder 301 is vertically arranged and penetrates the top of the reactor body 1. The top end of the outer cylinder 301 is located outside the top of the reactor body 1, and the bottom end of the outer cylinder 301 is located inside the reactor body 1 and is open and connected to the reactor body 1. The lower half of the outer cylinder 301 is a conical tube structure with the small end facing downward. The inner tube 302 penetrates the top of the outer cylinder 301, and the top end is located outside the top of the reactor body 1, and the bottom end is located inside the outer cylinder 301 and is connected to both the outer cylinder 301 and the reactor body 1.

[0058] The outer cylinder 301 has a coke powder inlet 3011 and an asphalt powder inlet 3012 on its circumferential sidewall. Both inlets are located above the conical structure of the outer cylinder 301. The coke powder inlet 3011 is connected to the outer cylinder 301 and is used to guide the coke powder tangentially into the outer cylinder 301. Guided by the inner wall of the outer cylinder 301, the coke powder naturally forms a spiral movement trajectory from top to bottom. During this movement, the coke powder particles are simultaneously affected by two key forces: one is the downward vertical gravity, which pushes the coke powder particles as a whole towards the vessel body 1; the other is the centrifugal force generated by the spiral motion, which causes the coke powder particles to tend to move radially outward along the outer cylinder 301.

[0059] The synergistic effect of these two forces effectively breaks down the agglomeration structure formed between coke powder particles due to intermolecular forces (such as van der Waals forces): for the originally clustered coke powder agglomerates, centrifugal force will fling coke powder particles of different sizes toward the inner wall of the outer cylinder 301, and the centrifugal force on the coke powder particles is positively correlated with their mass. Larger coke powder particles will approach the inner wall of the outer cylinder 301 more quickly and accelerate downward, while smaller coke powder particles will move along a spiral trajectory on the relatively inner side, thereby achieving physical separation between different particles; at the same time, the continuous effect of gravity ensures that the coke powder particles always maintain a downward movement trend during the separation process, avoiding the accumulation of coke powder particles in a certain area and re-agglomeration. Through this dynamic separation process, the coke powder entering the subsequent coating stage can exist in a more dispersed single particle or small particle size aggregate state, creating the basic conditions for uniform coating of asphalt powder, and thus providing a guarantee for improving the molding quality of graphite anode materials from the source.

[0060] Furthermore, the coke powder is preheated to a first preset temperature, which is set as the melting temperature of the asphalt powder. When the coke powder at its melting temperature comes into contact with the asphalt powder at a lower temperature in subsequent stages, the coke powder can act as an immediate heat source, transferring heat to the asphalt powder through direct contact between the particles. This localized heat transfer method, with particles as the carrier, can quickly bring the asphalt powder to its phase change temperature and melt it. The heat transfer is also more direct and uniform, avoiding the problem of insufficient melting of the asphalt powder due to localized insufficient temperature, which may occur in traditional overall heating methods. This provides the necessary temperature conditions for the asphalt powder to form a continuous and uniform coating layer on the surface of the coke powder particles.

[0061] The asphalt powder inlet 3012 is connected to the outer cylinder 301 and is located below the coke powder inlet 3011. This positional difference provides the necessary time and movement path for the coke powder to separate after entering the outer cylinder 301.

[0062] When coke powder is tangentially introduced into the outer cylinder 301 through the upper coke powder inlet 3011, it forms a downward spiral movement trajectory guided by the inner wall of the outer cylinder 301. During this process, the coke powder particles gradually complete the dispersion of agglomerates under the combined action of gravity and centrifugal force—centrifugal force causes the agglomerated particles to move towards the cylinder wall and be broken up, and particles of different sizes move in layers along the spiral trajectory to achieve physical separation; while gravity pushes the separated coke powder to continue moving downward, ensuring that it has completed a sufficient dispersion process before reaching the height of the asphalt powder inlet 3012, forming a state dominated by single particles or small-diameter aggregates.

[0063] Compared to the movement path of coke powder, when asphalt powder is introduced from the lower asphalt powder inlet 3012, its initial movement range is concentrated in the space below the coke powder separation area. The two materials form an orderly process of separation followed by contact in space. When the fully separated coke powder moves to the height of the asphalt powder inlet 3012, the coke powder particles have a uniformly dispersed morphology, enabling them to form a more complete contact interface with the newly introduced asphalt powder. This effectively avoids the problem of uneven outer coating and lack of inner coating caused by unseparated coke powder agglomerates directly contacting the asphalt powder. It ensures that the asphalt powder can uniformly cover the surface of each dispersed coke powder particle, thereby guaranteeing the continuity and integrity of the subsequent coating layer and laying a core foundation for improving the molding quality of graphite anode materials.

[0064] The asphalt powder has a second preset temperature, which is lower than the first preset temperature. This ensures that the asphalt powder can be heated to a molten state by the coke powder, facilitating its coating onto the coke powder particles. During this process, the heating of the asphalt powder only occurs in the inner layer region in contact with the coke powder. Because the initial temperature of the asphalt powder itself is relatively low, and its outer layer does not directly contact the high-temperature coke powder, heat transfer occurs indirectly only through the molten asphalt in the inner layer. The heat transfer efficiency decreases with increasing distance, resulting in a temperature distribution state where the inner layer is molten and the outer layer is at a lower temperature.

[0065] The viscosity of asphalt powder is negatively correlated with its temperature: the higher the temperature, the lower the viscosity and the stronger the fluidity; the lower the temperature, the higher the viscosity, but it can still maintain a certain degree of adhesion. When the outer layer of coated asphalt powder is at a relatively low temperature, its viscosity will remain within a relatively moderate range—it will not flow and spread due to excessive fluidity caused by excessively high temperature, nor will it lose its adhesive coating ability due to a sudden increase in viscosity caused by excessively low temperature.

[0066] More importantly, the lower outer layer temperature makes it less likely for a highly active viscous surface to form on the outer layer of the asphalt powder: if the overall temperature of the asphalt powder is too high, its surface viscosity will be significantly enhanced, making it very easy to adhere to uncoated coke powder particles or other asphalt powder clumps during subsequent movement, thus triggering secondary agglomeration; while the lower outer layer temperature can effectively suppress this excessive viscosity, reducing the probability of adhesion between the coated coke powder particles and other particles during subsequent stirring or conveying in the reactor body 1, thereby reducing the risk of agglomeration from the root and ensuring the uniformity and stability of the graphite anode material particle morphology.

[0067] To facilitate the conveying of coke powder and asphalt powder, the granulation device of the graphite anode material reactor is configured to include two feeding components. These two feeding components provide the driving force for the coke powder and asphalt powder to enter the cyclone separator 3. The feeding components can be configured as blowers 8, with the blower 8's air supply end connected to the coke powder inlet 3011 / asphalt powder inlet 3012, and its exhaust end connected to the coke powder / asphalt powder, thereby enabling the coke powder and asphalt powder to be conveyed into the outer cylinder 301 by driving a directional flow of air.

[0068] In a further embodiment, to achieve direct reuse of asphalt powder and hot air and reduce energy consumption, the granulation device for the graphite negative electrode material reactor further includes a coke powder feed pipe 4, an asphalt powder feed pipe 5, and a three-way pipe 6. The coke powder feed pipe 4 is installed on the cyclone separator 3, and one end is connected to the exhaust end of the blower 8. A hopper 10 is installed in the middle of the coke powder feed pipe 4, and the top of the hopper 10 is open for storing or receiving coke powder from the outside. The asphalt powder feed pipe 5 is installed on the cyclone separator 3. One end of the asphalt powder feed pipe 5 is connected to the exhaust end of the blower 8. A hopper 10 is provided in the middle of the asphalt powder feed pipe 5. The top of the hopper 10 is open and is used to store or receive asphalt powder from the outside. The three-way pipe 6 is connected to the top of the inner pipe 302, the other end of the coke powder feed pipe 4 away from the blower 8, and the other end of the asphalt powder feed pipe 5 away from the blower 8, so as to form a closed flow path. A filter structure is provided at the connection between the coke powder feed pipe 4 and the three-way pipe 6. The filter structure is used to filter asphalt powder and can be set as a filter screen.

[0069] During operation, two blowers 8 are started, which drive the air to flow in a specific direction. One blower 8 feeds the coke powder from the hopper 10 on the coke powder feed pipe 4 into the outer cylinder 301 through the coke powder feed inlet 3011. The coke powder then forms a spiral movement trajectory from top to bottom, thereby separating the coke powder particles and reducing agglomeration under the combined action of gravity and centrifugal force. The other blower 8 feeds the asphalt powder from the hopper 10 on the asphalt powder feed pipe 5 into the outer cylinder 301 through the asphalt powder feed inlet 3012. The asphalt powder then collides and comes into contact with the coke powder, and is heated and melted by the coke powder to achieve coating.

[0070] Air is heated upon contact with coke powder / asphalt powder to form hot air. The hot air entering the outer cylinder 301 then carries some asphalt powder through the inner pipe 302 into the three-way pipe 6. After being filtered by the filter screen, it returns to the outer cylinder 301 through the coke powder feed pipe 4, thus reusing the heat in the hot air. The asphalt powder adheres to the filter screen and is then carried back to the outer cylinder 301 through the asphalt feed pipe by the hot air. This allows for the direct reuse of asphalt powder, and because this portion of asphalt material has a temperature slightly lower than the second preset temperature, it also reduces the energy required to heat the asphalt powder.

[0071] In other embodiments, the filter structure may also be configured as a filter plate 7, which has multiple filter holes.

[0072] In a further embodiment, to improve the reuse rate of asphalt powder, both the coke powder feed pipe 4 and the asphalt powder feed pipe 5 are set horizontally, with the height of the coke powder feed pipe 4 being higher than that of the asphalt powder feed pipe 5; the filter plate 7 is inclined toward the coke powder feed pipe 4. Thus, when hot air and asphalt powder reach the filter plate 7, the hot air then passes through the filter holes and returns to the outer cylinder 301 through the coke powder feed pipe 4. The asphalt powder filtered by the filter plate 7 moves downwards and closer to the asphalt powder feed pipe 5 under the inclined guidance of the filter plate 7, thereby increasing the amount of asphalt powder recovered and improving the reuse rate.

[0073] In other embodiments, to improve the efficiency of asphalt powder coating coke powder, a connecting sleeve 303 is fixedly sleeved on the outer cylinder 301. The connecting sleeve 303 is located above the conical structure of the outer cylinder 301 and forms an annular second cavity 304 between it and the outer cylinder 301. The second cavity 304 is connected to the air supply end of the blower 8. There are multiple asphalt powder inlets 3012, which are arranged circumferentially and are all connected to the second cavity 304. In this way, asphalt powder can be simultaneously introduced into the outer cylinder 301 through multiple asphalt powder inlets 3012. Compared with a single asphalt powder inlet 3012, multi-channel input can avoid the conveying congestion of asphalt powder due to flow limitation in a single channel, so that the asphalt powder can enter the outer cylinder 301 more smoothly and quickly, directly increasing the total amount of asphalt powder introduced per unit time, that is, significantly improving the asphalt powder introduction efficiency.

[0074] Meanwhile, multiple circumferentially arranged asphalt powder inlets 3012 ensure a uniform circumferential distribution of asphalt powder within the outer cylinder 301. Combined with the spiral movement of coke powder along the inner wall of the outer cylinder 301 from top to bottom, the circumferentially distributed asphalt powder forms a fully circumferentially covered contact interface with the spirally moving coke powder. During the spiral movement, the outer circumference of the coke powder continuously encounters asphalt powder from different circumferential inlets 3012, avoiding the limitation of asphalt powder contacting coke powder only in localized areas under a single asphalt powder inlet 3012. This fully circumferential contact mode significantly increases the total amount of asphalt powder that collides and contacts coke powder per unit time, and the contact positions are more uniform, effectively solving the problems of insufficient contact, localized excess, or insufficient contact between asphalt powder and coke powder under a single inlet.

[0075] Therefore, on the one hand, increasing the amount of asphalt powder that coke powder comes into contact with per unit time means that more asphalt powder can combine with the dispersed coke powder in a timely manner, reducing the time that the coke powder remains in an uncoated state and lowering the risk of re-agglomeration. On the other hand, uniform contact in the entire circumference ensures that each coke powder particle can contact the asphalt powder during its movement, avoiding situations where some coke powder cannot be coated due to dead contact areas. The synergistic effect of these two factors ultimately improves the efficiency of asphalt powder coating coke powder, laying a crucial foundation for the subsequent formation of a uniform coating layer and ensuring the molding quality of graphite anode materials.

[0076] In a further embodiment, to avoid excessive interference with the flow path of the coke powder, which could affect the separation effect, the feed direction of the asphalt powder inlet 3012 is set to be eccentric. Specifically, as shown... Figure 8 As shown, the asphalt powder inlet 3012 points to one side of the center of the inner tube 302. Thus, the eccentrically introduced asphalt powder enters along the non-central area of ​​the inner wall of the outer cylinder 301. Its initial movement direction overlaps with the spiral direction of the coke powder rather than opposing it—the movement trend of the asphalt powder is consistent with the spiral flow direction of the coke powder, forming only gentle contact in local areas, rather than directly impacting and disrupting the flow rhythm of the coke powder. This ensures that the asphalt powder can smoothly enter the outer cylinder 301 and meet the coke powder, while avoiding turbulence in the coke powder flow field caused by airflow impact. It ensures that the coke powder has been fully separated through stable spiral motion before contacting the asphalt powder, preserving a good material foundation for subsequent uniform coating.

[0077] In other embodiments, to improve the heating uniformity of the vessel body 1, the steam inlet 1021 and the condensate outlet 1022 can be arranged opposite each other, so that the hot steam entering the vessel body 1 through the steam inlet 1021 must be turned around by at least 180 degrees before it can be discharged from the condensate outlet 1022, thereby enabling the hot steam to exchange heat with the vessel body 1 sufficiently.

[0078] In other embodiments, to improve the heat exchange capacity, a spiral tube can be inserted into the first cavity 103. The spiral tube is a spiral tubular structure and is fitted onto the vessel body 1 during installation and in contact with the vessel body 1. The two ends of the spiral tube are connected to the steam inlet 1021 and the condensate outlet 1022, respectively. This increases the heat exchange capacity by increasing the contact area with the vessel body 1.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The above embodiments are merely illustrative of several implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. A granulation device for a graphite anode material reactor, characterized in that, The granulation device for the graphite anode material reactor includes: Vertically placed vessel body (1); The stirring shaft (2) is vertically inserted into the vessel body (1) and can rotate around its own axis; the stirring shaft (2) is provided with stirring blades (201), which are configured to stir coke powder and asphalt powder. A heat source, configured to provide heat to the vessel body (1); Cyclone separator (3) is vertically mounted on vessel body (1) and its bottom is connected to vessel body (1). Cyclone separator (3) is provided with coke powder inlet (3011) and asphalt powder inlet. Coke powder inlet (3011) is connected to cyclone separator (3) and configured to guide coke powder into cyclone separator (3) tangentially. Coke powder has a first preset temperature, which is the melting temperature of asphalt powder. Asphalt powder inlet is connected to cyclone separator (3) and located below coke powder inlet (3011). Asphalt powder is configured to guide asphalt powder into cyclone separator (3). Asphalt powder has a second preset temperature, which is lower than the first preset temperature.

2. The granulation apparatus for graphite anode material reaction vessel according to claim 1, characterized in that, The granulation device for the graphite anode material reactor also includes a coke powder feed pipe (4), an asphalt powder feed pipe (5), and a three-way pipe (6). The coke powder feed pipe (4) is installed on the cyclone separator (3) and connected to the coke powder inlet (3011), and is configured to receive coke powder from the outside. The asphalt powder feed pipe (5) is installed on the cyclone separator (3) and connected to the asphalt powder inlet, and is configured to receive asphalt powder from the outside. The three-way pipe (6) is connected to the top of the cyclone separator (3), the coke powder feed pipe (4), and the asphalt powder feed pipe (5) to form a closed flow path. A filter structure is installed at the connection between the coke powder feed pipe (4) and the three-way pipe (6), and the filter structure is configured to filter asphalt powder.

3. The granulation apparatus for graphite anode material reactor according to claim 2, characterized in that, The filter structure is a filter plate (7), and the filter plate (7) is provided with multiple filter holes.

4. The granulation apparatus for graphite anode material reactor according to claim 3, characterized in that, Both the coke powder feed pipe (4) and the asphalt powder feed pipe (5) are set horizontally, and the height of the coke powder feed pipe (4) is higher than that of the asphalt powder feed pipe (5); the filter plate (7) is set at an angle toward the coke powder feed pipe (4).

5. The granulation apparatus for graphite anode material reaction vessel according to claim 1, characterized in that, There are multiple asphalt powder inlets, arranged circumferentially.

6. The granulation apparatus for graphite anode material reactor according to claim 5, characterized in that, The direction of the asphalt powder feed inlet is set eccentrically.

7. The granulation apparatus for graphite anode material reactor according to claim 1, characterized in that, The graphite anode material reactor granulation device also includes two feeding components, which are configured to provide driving force for coke powder and asphalt powder to be fed into the cyclone separator (3), respectively.

8. The granulation apparatus for graphite anode material reactor according to claim 7, characterized in that, The feeding component is a blower (8).

9. The granulation apparatus for graphite anode material reactor according to claim 8, characterized in that, The blower (8) has a heating element configured to heat coke powder to a first preset temperature or asphalt powder to a second preset temperature.

10. The granulation apparatus for graphite anode material reactor according to claim 1, characterized in that, The graphite anode material reactor granulation device also includes a drive assembly (9), which is configured to provide a driving force for the rotation of the stirring shaft (2).

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