Vapor deposition coated rotary furnace

Abstract

The utility model discloses a vapor deposition cladding rotary furnace which comprises a furnace tube, a driving mechanism for driving the furnace tube to rotate, a first air inlet assembly, a second air inlet assembly, an exhaust assembly, a vacuumizing assembly, a first rotating joint and a second rotating joint, the first air inlet assembly and the second air inlet assembly are communicated with the interior of the furnace tube through the first rotating joint, and the exhaust assembly and the vacuumizing assembly are communicated with the interior of the furnace tube through the second rotating joint. The first gas inlet assembly and the second gas inlet assembly are communicated with the interior of the furnace tube through the first rotating joint, and the gas exhaust assembly and the vacuumizing assembly are communicated with the interior of the furnace tube through the second rotating joint, so that dynamic connection between a static gas pipeline and the rotating furnace tube and connection components thereof is realized, smooth connection is guaranteed, and meanwhile, the vacuum pumping efficiency is improved. And the high air tightness requirement in the furnace tube can be maintained, and the production and manufacturing requirements of a silicon-carbon negative electrode material are met.

Description

Technical Field

[0001] The utility model relates to silicon-carbon negative electrode material production and manufacturing equipment, in particular to a vapor deposition coating rotary furnace. Background Art

[0002] Silicon-carbon anode material is an important lithium battery anode material, and its energy density is 10 times that of graphite anode material. In recent years, major lithium battery anode material manufacturers and research institutes have started to develop silicon-carbon anode materials.

[0003] There are two main process routes for the production of silicon-carbon negative electrode materials, one is the fluidized bed vapor deposition coating process, and the other is the rotary kiln vapor deposition coating process.

[0004] The vapor deposition coating fluidized bed is a batch furnace, and the process flow is as follows:

[0005] (1) Use inert gas to clean the fluidized bed chamber and components to expel residual air and oxygen;

[0006] (2) The thermal field raises the temperature of the chamber to the specified process temperature, and the carrier fluidizes the porous carbon into the reaction chamber;

[0007] (3) Silane gas is introduced into the reaction chamber. Silane is cracked at high temperature to generate silicon powder and hydrogen. The silicon powder encounters fluidized porous carbon and is deposited in the pores of the porous carbon to obtain a silicon-carbon negative electrode material.

[0008] The vapor deposition coating rotary furnace is also a batch furnace, and the process flow is as follows:

[0009] (1) Porous carbon is introduced into the furnace body, and the interior of the furnace body and components are cleaned with inert gas to expel residual air and oxygen;

[0010] (2) The thermal field heats the furnace to the specified process temperature;

[0011] (3) Silane gas is introduced into the furnace body. Silane is cracked at high temperature to generate silicon powder and hydrogen. The silicon powder encounters fluidized porous carbon and is deposited in the pores of the porous carbon to obtain a silicon-carbon negative electrode material.

[0012] Silane gas is needed in the production process of silicon-carbon negative electrode materials. It will ignite when it comes into contact with air and is a very dangerous hazardous chemical. The fluidized bed can achieve better process gas sealing to avoid silane leakage and explosion. The fluidized bed vapor deposition coating process is relatively mature and stable, and it can currently produce qualified products. However, the existing vapor deposition coating fluidized bed technology has the defect that although it can produce qualified products, it cannot expand production capacity. The current production capacity is limited to 20 kg / batch. After expansion, it will not be possible to produce qualified products, and the consistency between batches is also difficult to guarantee. Although the rotary furnace has a large production capacity and can achieve dynamic sintering, the existing vapor deposition coating rotary furnace technology also has obvious defects: it generally adopts general sealing structures such as packing and graphite rings, and the sealing performance is not guaranteed, and silane leakage or even explosion may occur; the material is moved by the scraper in the furnace tube, and the dust is too large. Most of the material is carried to the dust collector by the airflow and cannot flow back into the furnace again, resulting in low yield; some materials are at the bottom of the furnace tube, and some materials are in a lifted state, the material fluidization is not sufficient, and the reaction is uneven; usually the furnace tube is long, the air inlet pipe is over-preheated in the length direction, the process gas is cracked in advance, and the air inlet is blocked; the furnace tube opening structure makes it difficult to achieve automatic loading and unloading. These defects have caused the rotary furnace vapor deposition coating process to remain in the experimental stage. Utility Model Content

[0013] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a vapor deposition coated rotary furnace which can realize dynamic connection between each pipeline and the furnace tube and meet the high airtightness requirement inside the furnace tube.

[0014] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0015] A vapor deposition coating rotary furnace comprises a furnace tube, a driving mechanism for driving the furnace tube to rotate, a first air intake component, a second air intake component, an exhaust component, a vacuum component, a first rotary joint and a second rotary joint. The first air intake component and the second air intake component are connected to the interior of the furnace tube via the first rotary joint, and the exhaust component and the vacuum component are connected to the interior of the furnace tube via the second rotary joint.

[0016] As a further improvement of the above technical solution: a material raising member and a pushing member for pushing materials to the material raising member are provided inside the furnace tube, and a plurality of the material raising members are provided and distributed along the circumference of the furnace tube.

[0017] As a further improvement of the above technical solution: the material lifting member is a material lifting plate, the pushing member is a screw belt, the first rotary joint and the second rotary joint are respectively arranged at both ends of the furnace tube, the material lifting plate is located at one end of the furnace tube close to the first rotary joint, and the screw belt is located at one end of the furnace tube close to the second rotary joint.

[0018] A sealing plate is provided at one end of the furnace tube, an exhaust filter is provided on the sealing plate, the second rotary joint is communicated with the exhaust filter, and the exhaust filter is connected to an air compression tank for backblowing.

[0019] As a further improvement of the above technical solution: the exhaust filter elements are provided in plurality and distributed along the circumference of the sealing plate, and the air compression tank is arranged in the middle of the sealing plate.

[0020] As a further improvement of the above technical solution: a sealed chamber is provided outside the furnace tube, a seal is provided between the sealed chamber and the furnace tube, the sealed chamber is connected to the exhaust assembly, a discharge valve is provided on the furnace tube, the discharge valve is located in the sealed chamber, and the sealed chamber is opposite to a material receiving container.

[0021] As a further improvement of the above technical solution: a heat insulation board is provided at the other end of the furnace tube, a heat insulation sleeve is passed through the heat insulation board, an air intake pipe is passed through the heat insulation sleeve, one end of the air intake pipe is connected to the first rotary joint, and the other end of the air intake pipe is provided with an injection hole and extends to the inside of the furnace tube.

[0022] As a further improvement of the above technical solution: it also includes a feeder and a feed guide rail, the feeder is arranged on the feed guide rail, and the furnace tube is provided with a feed valve.

[0023] As a further improvement of the above technical solution: the exhaust assembly includes a first pulse dust collector and an ignition combustion device connected in sequence;

[0024] And / or, the vacuum assembly includes a second pulse dust collector and a vacuum unit connected in sequence.

[0025] As a further improvement of the above technical solution: it also includes a rapping mechanism for causing the furnace tube to vibrate;

[0026] and / or, an inclination adjustment mechanism for adjusting the inclination angle of the furnace tube;

[0027] And / or, a temperature control device for heating and cooling the furnace tube, the temperature control device comprising a heat preservation chamber arranged on the outer periphery of the furnace tube, the heat preservation chamber being provided with a heating element, an air inlet and an air exhaust port, the air inlet being connected to an air inlet fan and / or the air exhaust port being connected to an exhaust fan.

[0028] Compared with the prior art, the advantages of the utility model are:

[0029] The utility model discloses a vapor deposition coating rotary furnace, in which the furnace tube is driven to rotate by a driving mechanism, the first air intake assembly can be used for process gas to enter the furnace tube for reaction, the second air intake assembly can be used for inert gas to enter the furnace tube for purging, the exhaust assembly can be used for exhausting gas inside the furnace tube, and the vacuum assembly can provide a vacuum environment for the furnace tube, and can also be used to extract air and oxygen inside the furnace tube to speed up the cleaning speed of the atmosphere inside the furnace tube. The first air intake assembly and the second air intake assembly are connected to the inside of the furnace tube through a first rotary joint, and the exhaust assembly and the vacuum assembly are connected to the inside of the furnace tube through a second rotary joint, thereby realizing the dynamic connection between the static gas pipeline and the rotating furnace tube and its connecting components, while ensuring a smooth connection, it can also maintain the high air tightness requirements inside the furnace tube, meeting the requirements for the production and manufacturing of silicon-carbon negative electrode materials.

[0030] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a vapor deposition coating rotary furnace of the utility model.

[0032] Figure 2 It is a schematic diagram of the main structure of the heat preservation chamber in the utility model.

[0033] Figure 3 It is a schematic diagram of the main structure of the sealed chamber in the utility model.

[0034] The symbols in the figure represent:

[0035] 1. Furnace tube; 10. Discharge valve; 11. Lifting member; 12. Pushing member; 13. Sealing plate; 14. Exhaust filter element; 15. Air compressor tank; 16. Insulation board; 17. Insulation sleeve; 18. Intake pipe; 19. Feed valve; 2. Driving mechanism; 31. First air intake assembly; 32. Second air intake assembly; 4. Exhaust assembly; 41. First pulse dust collector; 42. Ignition combustion device; 5. Vacuuming assembly; 51. Second pulse dust collector; 52. Vacuum unit; 61. First rotary joint; 62. Second rotary joint; 71. Sealing chamber; 72. Sealing member; 73. Receiving container; 81. Feeder; 82. Feed guide rail; 91. Vibrating mechanism; 92. Inclination mechanism; 93. Insulation chamber; 94. Heating element; 95. Air inlet; 96. Air outlet; 97. Air inlet fan. DETAILED DESCRIPTION

[0036] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "assemble", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] Figures 1 to 3An embodiment of the vapor deposition coated rotary kiln of the utility model is shown. The vapor deposition coated rotary kiln of this embodiment includes a furnace tube 1, a driving mechanism 2 for driving the furnace tube 1 to rotate, a first air intake component 31, a second air intake component 32, an exhaust component 4, a vacuum component 5, a first rotary joint 61 and a second rotary joint 62. The first air intake component 31 and the second air intake component 32 are connected to the interior of the furnace tube 1 via the first rotary joint 61, and the exhaust component 4 and the vacuum component 5 are connected to the interior of the furnace tube 1 via the second rotary joint 62. Among them, the furnace tube 1 is preferably a cylindrical structure, of course, in other embodiments, it can also be a polygonal structure; the driving mechanism 2 is preferably driven by a combination of a variable frequency motor, a reducer and a driving gear, so that the furnace tube 1 rotates forward or reversely, and the variable frequency motor can adjust the rotation speed of the furnace tube 1, thereby producing different degrees of material fluidization effect. Of course, in other embodiments, the driving mechanism 2 can also adopt other forms as long as it can drive the rotation of the furnace tube 1; the first rotary joint 61 and the second rotary joint 62 are multi-channel joints, which are standard parts and can usually meet the airtightness requirement of 30Mpa.

[0041] In the vapor deposition coated rotary furnace of this embodiment, the furnace tube 1 is driven to rotate by the driving mechanism 2, the first air intake component 31 can be used for process gas to enter the furnace tube 1 for reaction, the second air intake component 32 can be used for inert gas to enter the furnace tube 1 for purging, the exhaust component 4 can be used for exhausting the gas inside the furnace tube 1, and the vacuum component 5 can provide a vacuum environment for the furnace tube 1, and can also be used to extract air and oxygen from the furnace tube 1 to speed up the cleaning speed of the atmosphere inside the furnace tube 1. The first air intake component 31 and the second air intake component 32 are connected to the inside of the furnace tube 1 through the first rotary joint 61, and the exhaust component 4 and the vacuum component 5 are connected to the inside of the furnace tube 1 through the second rotary joint 62, thereby realizing the dynamic connection between the static gas pipeline and the rotating furnace tube 1 and its connecting components (such as the air intake pipe 18, the exhaust filter element 14, etc.), while ensuring a smooth connection, it can also maintain the high air tightness requirements inside the furnace tube 1, meeting the requirements for the production and manufacturing of silicon-carbon negative electrode materials.

[0042] Furthermore, in this embodiment, a material lifting member 11 and a pushing member 12 for pushing the material to the material lifting member 11 are provided inside the furnace tube 1. The material lifting member 11 is provided in plurality and distributed along the circumference of the furnace tube 1. The material lifting member 11 rotates with the rotation of the furnace tube 1, bringing the material to a high position and scattering it, so that the material presents a fluidized state, thereby promoting the contact and reaction between the material and the process gas, and improving the consistency of the material reaction. The pushing member 12 also rotates with the furnace tube 1, thereby continuously pushing the material to the material lifting member 11, so that the material continuously produces a fluidized effect, and the structure is simple and effective.

[0043] Furthermore, in this embodiment, the material lifting member 11 is a material lifting plate (the material lifting plate can be a straight plate structure, a spoon-shaped structure, a V-shaped structure or other), the pushing member 12 is a screw belt, the first rotary joint 61 and the second rotary joint 62 are respectively arranged at both ends of the furnace tube 1, the material lifting plate is located at one end of the furnace tube 1 close to the first rotary joint 61, and the screw belt is located at one end of the furnace tube 1 close to the second rotary joint 62. When the process is carried out, the process gas enters the furnace tube 1 through the first rotary joint 61 and reaches the area where the material lifting plate is located. The material lifting plate and the screw belt rotate forward with the furnace tube 1. The material lifting plate brings the material to a high position and scatters it, so that the material is in a fluidized state, thereby promoting the contact and reaction between the material and the process gas and improving the consistency of the material reaction. The screw belt continuously pushes the material to the material lifting member 11, so that the material continues to produce a fluidized effect. When unloading, the screw belt reverses with the furnace tube 1, thereby pushing the material to the end of the furnace tube 1 close to the second rotary joint 62, which is convenient for unloading. Air intake, exhaust and unloading are performed at both ends of the furnace tube 1, without interfering with each other, and the layout is reasonable. Preferably, the length of the furnace tube 1 is shorter than that of the existing furnace tube and the diameter of the furnace tube 1 is larger than that of the existing furnace tube, and the speed of the variable frequency motor is increased, which is conducive to improving the fluidization effect.

[0044] Furthermore, in this embodiment, a sealing plate 13 is provided at one end of the furnace tube 1, an exhaust filter 14 is provided on the sealing plate 13, the second rotary joint 62 is connected to the exhaust filter 14, and the exhaust filter 14 is connected to an air pressure tank 15 for backblowing. The exhaust side of the furnace tube 1 is blocked by the sealing plate 13, the exhaust filter 14 is used to filter the dust carried in the exhaust gas, and the air pressure tank 15 uses a pulsed airflow for backblowing, thereby shaking off the dust adhering to the exhaust filter 14, and the dust is pushed to the lifting plate again by the spiral belt, thereby realizing the recycling of materials and improving the yield of batch materials. Preferably, the exhaust filter 14 adopts a high-temperature sintered filter element, which can withstand the high temperature in the furnace tube 1.

[0045] As a preferred embodiment, multiple exhaust filter elements 14 are provided and distributed along the circumference of the sealing plate 13, which is conducive to improving the exhaust efficiency and dust recovery efficiency. The air pressure tank 15 is provided in the middle of the sealing plate 13, which is conducive to shortening the connection pipeline between the air pressure tank 15 and each exhaust filter element 14. Of course, in other embodiments, only a single exhaust filter element 14 can be provided, and the air pressure tank 15 can also be provided at other positions and connected to the exhaust filter element 14 through the second rotary joint 62.

[0046] Furthermore, in this embodiment, a sealed chamber 71 is provided outside the furnace tube 1, and the sealed chamber 71 is located at one end of the furnace tube 1 close to the second rotary joint 62. A sealing member 72 (for example, a rubber ring structure, a packing structure, or a labyrinth structure) is provided between the sealed chamber 71 and the furnace tube 1. The sealed chamber 71 is connected to the exhaust assembly 4. A discharge valve 10 is provided on the furnace tube 1, and the discharge valve 10 is located in the sealed chamber 71. The sealed chamber 71 is provided with a material receiving container 73 (for example, a material receiving hopper, a material receiving tank, etc., preferably arranged below the sealed chamber 71, convenient for gravity feeding, and the material receiving container 73 can be flexibly or rigidly connected to the sealed chamber 71). The sealing member 72 is used to fill the gap between the sealed chamber 71 and the furnace tube 1 to prevent dust from overflowing from the gap during discharge. When unloading, the unloading valve 10 is opened, and the material enters the receiving container 73 through the unloading valve 10 and the sealed chamber 71. The dust entering the sealed chamber 71 can be discharged through the exhaust assembly 4 and processed accordingly. Preferably, the unloading valve 10 is a pneumatic ball valve, and the compressed air provided by the air pressure tank 15 controls the opening and closing of the ball valve. Preferably, four unloading valves 10 are provided and distributed around the furnace tube 1, which is conducive to improving the unloading efficiency.

[0047] Furthermore, in this embodiment, a heat insulation board 16 is provided at the other end of the furnace tube 1, a heat insulation sleeve 17 is provided on the heat insulation board 16, an air inlet pipe 18 is provided in the heat insulation sleeve 17, one end of the air inlet pipe 18 is connected to the first rotary joint 61, and the other end of the air inlet pipe 18 is provided with an air jet hole and extends to the inside of the furnace tube 1. The heat insulation board 16 is used to block the other end of the furnace tube 1 to reduce the heat loss in the furnace tube 1, and at the same time provide an installation basis for the air inlet pipe 18. Under the protection of the heat insulation board 16 and the heat insulation sleeve 17, the heat transfer to the air inlet pipe 18 is reduced, so that the process gas will not be cracked in the air inlet pipe 18, and the blockage of the air jet hole is avoided. During the process, the process gas passes through the first air inlet assembly 31, the first rotary joint 61, and the air inlet pipe 18 in sequence, and then sprays into the furnace tube 1 through the air jet hole at the end of the air inlet pipe 18. The length of the air jet hole at the end of the air inlet pipe 18 should be shortened as much as possible to reduce the residence time of the process gas and prevent cracking. For the purge gas, another air inlet pipe 18 may be provided in the heat insulation sleeve 17. The difference is that the structure can be simplified and there is no need to provide an air injection hole.

[0048] Furthermore, in this embodiment, the vapor deposition coating rotary furnace also includes a feeder 81 (for example, a spiral feeder, a vibrating feeder or other forms) and a feed guide rail 82. The feeder 81 is arranged on the feed guide rail 82, and a feed valve 19 is arranged on the furnace tube 1. Preferably, the feed valve 19 also adopts a pneumatic ball valve and is installed on the insulation board 16 to reduce the heat transfer from the furnace tube 1 to the ball valve. The second air intake assembly 32 is connected to the feed ball valve through the second rotary joint 62, and the opening and closing of the feed ball valve can be controlled by compressed air. When feeding, the feed valve 19 is opened, the feeder 81 moves along the feed guide rail 82, and the material pipe extends into the furnace tube 1 through the feed valve 19. After the feeding is completed, the feeder 81 moves in the opposite direction along the feed guide rail 82, and the feed valve 19 is closed after the material pipe exits. The feeder 81 can be manually or pneumatically, electrically, etc. to achieve reciprocating movement along the feed guide rail 82.

[0049] In this embodiment, the exhaust assembly 4 includes a first pulse dust collector 41 and an ignition combustion device 42 connected in sequence. The first pulse dust collector 41 is located near the end of the exhaust assembly 4 and is used to further filter the dust in the exhaust gas. The ignition combustion device 42 is located at the end of the exhaust assembly 4 and is used to burn the combustible gas components in the exhaust gas to avoid air pollution.

[0050] The vacuum assembly 5 includes a second pulse dust collector 51 and a vacuum unit 52 which are connected in sequence. The vacuum unit 52 is located at the end of the vacuum assembly 5 and can be a single-stage pump or a multi-stage pump. The second pulse dust collector 51 is located near the end of the vacuum assembly 5 and is used to filter dust in the gas.

[0051] In this embodiment, the vapor deposition coating rotary furnace also includes a vibration mechanism 91 for vibrating the furnace tube 1, an inclination adjustment mechanism 92 for adjusting the inclination angle of the furnace tube 1, and a temperature control device for heating and cooling the furnace tube 1. The temperature control device includes an insulation chamber 93 arranged on the outer periphery of the furnace tube 1, and the insulation chamber 93 is provided with a heating element 94, an air inlet 95 and an exhaust port 96, and the air inlet 95 is connected to an air inlet fan 97.

[0052] The rapping mechanism 91 is connected to the furnace tube 1, and periodically strikes the furnace tube 1 as it rotates, causing the furnace tube 1 to vibrate, thereby shaking off the adhered materials inside the furnace tube 1. The rapping mechanism 91 can also be located outside the furnace tube 1 without being connected, and periodically strikes the furnace tube 1 through external power, causing the furnace tube 1 to vibrate, thereby achieving the same purpose.

[0053] The inclination adjustment mechanism 92 can be a hinge or a screw structure, etc., for adjusting the inclination of the furnace tube 1. When the material is in the process, the furnace tube 1 is usually horizontally inclined; when it is necessary to discharge the material, the furnace tube 1 is usually inclined at a certain angle so that the material flows in the direction of gravity of the discharge. Since a spiral belt is provided inside the furnace tube 1, the forward and reverse flow of the material can be realized, so the inclination adjustment mechanism 92 can also be eliminated.

[0054] The temperature control device is used to provide thermal field conditions for the process reaction, wherein the heating element 94 can be any one of an electric heating element, an induction heating element or a gas heating element. The interior of the insulation chamber 93 constitutes a thermal field space, and the lifting member 11 and the heat insulation board 16 are arranged corresponding to the insulation chamber 93. When the furnace tube 1 needs to be cooled, the air intake 973 delivers natural air into the insulation chamber 93 through the air inlet 95, and the air takes out the heat inside the cavity through thermal convection, thereby cooling the furnace tube 1. Of course, in other embodiments, the exhaust port 96 may be connected to an exhaust fan, and external air may flow into the insulation chamber 93 from the air inlet 95, and after heat exchange with the furnace tube 1 to cool it down, it is discharged from the exhaust port 96.

[0055] The process flow of the utility model vapor deposition coating rotary kiln is as follows:

[0056] Feeding: Open the feeding valve 19, the feeder 81 moves into position along the feeding guide rail 82, and the feed pipe of the feeder 81 extends into the interior of the furnace tube 1 to feed the porous carbon.

[0057] Cleaning: Close the feed valve 19 and the discharge valve 10, and close the first air intake assembly 31 and the second air intake assembly 32. Open the vacuum unit 52, extract the air in the furnace tube and its connected pipes, and when the air is pumped to 10Pa, open the second air intake assembly 32 and introduce protective gas argon or nitrogen. Repeat the above process to further reduce the oxygen content inside the furnace tube 1. After cleaning, close the vacuum assembly 5.

[0058] Process reaction: Start the driving mechanism 2 to drive the furnace tube 1 to rotate forward, the heating element 94 heats the furnace tube 1, and the second air intake component 32 is continuously opened. The temperature rises to the specified process temperature (such as 400°C), and the first air intake component 31 is opened. The process gas enters the furnace tube 1 and cracks, and the silicon powder is deposited in the porous carbon fluidized by the lifting plate in the furnace tube 1 and suspended in the air to obtain the silicon-carbon negative electrode material. The cracked hydrogen is discharged, purified, and burned from the exhaust filter element 14 and the exhaust component 4 in turn. The dust in the airflow is blocked, backblown, and shaken off by the exhaust filter element 14, and is pushed back to the lifting plate area in the furnace tube 1 through the screw belt for recycling.

[0059] Cooling: After the process is completed, the first air intake assembly 31 is closed and the second air intake assembly 32 is kept open. When the temperature in the furnace tube 1 drops to a set value (eg, 300° C.), the air intake fan 97 is turned on to cool the furnace tube 1 and the material inside.

[0060] Discharging: After the temperature in the furnace drops to the set value (e.g., 50°C), turn off the air intake fan 97 and the second air intake assembly 32. Start the drive mechanism 2 to drive the furnace tube 1 to reverse, adjust the inclination adjustment mechanism 92 to tilt the furnace tube 1 toward the discharge, open the exhaust assembly 4, open the discharge valve 10, and the material enters the receiving container 73 to be collected. The dust generated during the unloading process will be taken away by the exhaust assembly 4.

[0061] Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of 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 should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A vapor deposition coating rotary kiln, characterized in that: The invention comprises a furnace tube (1), a driving mechanism (2) for driving the furnace tube (1) to rotate, a first air intake component (31), a second air intake component (32), an exhaust component (4), a vacuum component (5), a first rotary joint (61) and a second rotary joint (62), wherein the first air intake component (31) and the second air intake component (32) are connected to the interior of the furnace tube (1) via the first rotary joint (61), and the exhaust component (4) and the vacuum component (5) are connected to the interior of the furnace tube (1) via the second rotary joint (62).

2. The vapor deposition coating rotary kiln according to claim 1, characterized in that: A material raising member (11) and a pushing member (12) for pushing materials to the material raising member (11) are provided inside the furnace tube (1); a plurality of the material raising members (11) are provided and are distributed along the circumference of the furnace tube (1).

3. The vapor deposition coating rotary kiln according to claim 2, characterized in that: The material lifting member (11) is a material lifting plate, the pushing member (12) is a screw belt, the first rotary joint (61) and the second rotary joint (62) are respectively arranged at two ends of the furnace tube (1), the material lifting plate is located at one end of the furnace tube (1) close to the first rotary joint (61), and the screw belt is located at one end of the furnace tube (1) close to the second rotary joint (62).

4. The vapor deposition coating rotary kiln according to claim 1, characterized in that: A sealing plate (13) is provided at one end of the furnace tube (1), an exhaust filter element (14) is provided on the sealing plate (13), the second rotary joint (62) is in communication with the exhaust filter element (14), and the exhaust filter element (14) is connected to an air pressure tank (15) for backblowing.

5. The vapor deposition coating rotary kiln according to claim 4, characterized in that: The exhaust filter elements (14) are provided in plurality and are distributed along the circumference of the sealing plate (13), and the air pressure tank (15) is arranged in the middle of the sealing plate (13).

6. The vapor deposition coating rotary kiln according to claim 1, characterized in that: A sealed chamber (71) is provided outside the furnace tube (1), a sealing member (72) is provided between the sealed chamber (71) and the furnace tube (1), the sealed chamber (71) is communicated with the exhaust assembly (4), a discharge valve (10) is provided on the furnace tube (1), the discharge valve (10) is located in the sealed chamber (71), and the sealed chamber (71) is opposite to a material receiving container (73).

7. The vapor deposition coating rotary kiln according to claim 1, characterized in that: The other end of the furnace tube (1) is provided with a heat insulation plate (16), a heat insulation sleeve (17) is passed through the heat insulation plate (16), an air intake pipe (18) is passed through the heat insulation sleeve (17), one end of the air intake pipe (18) is connected to the first rotary joint (61), and the other end of the air intake pipe (18) is provided with an air injection hole and extends to the interior of the furnace tube (1).

8. The vapor deposition coating rotary furnace according to any one of claims 1 to 7, characterized in that: It also comprises a feeder (81) and a feed guide rail (82), wherein the feeder (81) is arranged on the feed guide rail (82), and a feed valve (19) is arranged on the furnace tube (1).

9. The vapor deposition coating rotary furnace according to any one of claims 1 to 7, characterized in that: The exhaust assembly (4) comprises a first pulse dust collector (41) and an ignition combustion device (42) which are connected in sequence; And / or, the vacuum assembly (5) includes a second pulse dust collector (51) and a vacuum unit (52) connected in sequence.

10. The vapor deposition coating rotary furnace according to any one of claims 1 to 7, characterized in that: It also includes a rapping mechanism (91) for causing the furnace tube (1) to vibrate; and / or, an inclination adjustment mechanism (92) for adjusting the inclination angle of the furnace tube (1); And / or, a temperature control device for heating and cooling the furnace tube (1), the temperature control device comprising a heat preservation chamber (93) arranged on the outer periphery of the furnace tube (1), the heat preservation chamber (93) being provided with a heating element (94), an air inlet (95) and an air outlet (96), the air inlet (95) being connected to an air inlet fan (97) and / or the air outlet (96) being connected to an exhaust fan.

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