Integrated modularized high-pressure mechanical sealing device for lithium battery negative electrode high-temperature rotary kiln

Abstract

The invention discloses an integrated modular high-pressure mechanical sealing device for a lithium battery negative electrode high-temperature rotary kiln. The integrated modular high-pressure mechanical sealing device comprises an outer cover plate and a sealing carrier fixedly installed on one side of the outer cover plate. A sealing moving ring is arranged on one side of the sealing carrier, and a plurality of cylindrical rolling bodies are arranged between the top of the sealing moving ring and the sealing carrier; a first ceramic fiber packing and a polytetrafluoroethylene packing are mounted on the sealing carrier, and the ceramic fiber packing is used for blocking high-temperature hot smoke; annular plates are arranged on one side of the first ceramic fiber packing and one side of the polytetrafluoroethylene packing, and sliding blocks are arranged on one sides of the annular plates; a plurality of nitrogen inlets and at least one exhaust port are formed in one side of the outer cover plate; a multi-stage combined sealing structure is adopted, a buffering loop from high temperature to low temperature is constructed, tiny dust is isolated and weakened for multiple times, an efficient and durable sealing mechanism is achieved, the sealing performance is greatly improved, and the service life is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to the field of sealing technology, and more specifically, to an integrated modular high-pressure mechanical sealing device for a lithium battery negative electrode high-temperature rotary kiln. Background Art

[0002] With the rapid development of new energy vehicles and energy storage industries, the demand for processing technology of lithium battery negative electrode materials (such as artificial graphite, silicon-carbon composite materials, etc.) has increased sharply. The manufacture of artificial graphite is generally made of raw materials such as needle coke, petroleum coke, asphalt coke that are easy to graphitize, through pretreatment, crushing, shaping, mixing, secondary granulation, graphitization high-temperature heat treatment and other processes. Preliminary granulation and graphitization are the core links in the manufacture of artificial graphite, and the industry barriers are in the graphitization link. As the core equipment for high-temperature graphitization of negative electrode materials, the sealing performance of the rotary kiln directly determines the production energy consumption, process stability and equipment service life. In the production of silicon-carbon composite materials, rotary kiln equipment is used for vapor deposition (CVD), which has the advantages of high efficiency and large output, but because there are still a large number of dangerous and explosive gases in the reaction atmosphere, the sealing of the rotary kiln is particularly important.

[0003] During the production process, due to different processes, we are faced with challenges of one or more of the following problems: high temperature (1000-1100℃), high dust, continuous operation, etc. Traditional mechanical sealing systems are gradually no longer able to meet the needs of engineering production.

[0004] The existing sealing structures are mainly the following: fish scale seal, soft packing seal, and end face seal. These sealing forms have their own advantages and disadvantages in use. Among them, fish scale seal and soft packing seal are the most widely used. The cost of end face seal is relatively high, and the sealing effect is also improved to a certain extent. At present, most manufacturers basically use a combination of these sealing forms in the negative electrode field.

[0005] At present, these types of seals have the following main defects:

[0006] Insufficient adaptability to extreme working conditions: Fish scale seals have poor sealing effects and are widely used in a series of internal heat kilns such as cement kilns. They have poor sealing properties and cannot guarantee the low oxygen content requirements for the production of negative electrode materials when the kiln is operating at negative pressure. Soft packing seals are prone to gap leakage during operation on large-size seals due to the vibration, high temperature, expansion and other factors of the kiln body. The end face seals are prone to eccentric wear at high temperatures, resulting in increased leakage. Large seal leakage not only increases the cost of inert gas consumption (accounting for 5-15% of the total cost), but also causes oxidation and degradation of the material. Especially when operating at positive pressure, toxic and harmful gases (acetylene, hydrogen sulfide, etc.) in the kiln are prone to leakage, endangering safe production.

[0007] High negative pressure sealing efficiency is limited: Currently, continuous rotary kilns generally use positive pressure operation (0-300Pa), but when running on a vacuum kiln, the pressure needs to reach an absolute pressure of about 100Pa and meet the oxygen content of less than 50ppm. The traditional sealing structure has significant leakage under high negative pressure conditions, and it is difficult to meet the process requirement of oxygen content less than 50ppm.

[0008] Long maintenance and repair time: The existing sealing components adopt a decentralized layout, and replacement requires shutdown and disassembly of the corresponding auxiliary components. A single maintenance takes up to 48-72 hours, seriously affecting the operating efficiency of the equipment.

[0009] Lack of modular design: The traditional sealing system lacks standardized interface design and cannot adapt to the rapid transformation needs of rotary kilns of different specifications. A large number of non-standard components are used in production design, which takes a long time to meet the demand and cannot respond quickly to market demand, making product quality management difficult. Summary of the invention

[0010] In order to solve at least one of the above technical problems, the present invention proposes an integrated modular high-pressure mechanical sealing device for a lithium battery negative electrode high-temperature rotary kiln.

[0011] A first aspect of the present invention provides an integrated modular high-pressure mechanical sealing device for a lithium battery negative electrode high-temperature rotary kiln, comprising: an outer cover plate and a sealing carrier fixedly mounted on one side of the outer cover plate;

[0012] A sealing dynamic ring is arranged on one side of the sealing carrier, and a plurality of cylindrical rolling bodies are arranged between the top of the sealing dynamic ring and the sealing carrier;

[0013] The sealing carrier is provided with a first ceramic fiber packing and a polytetrafluoroethylene packing, wherein the ceramic fiber packing is used to block high-temperature hot smoke;

[0014] One side of each of the first ceramic fiber packing and the polytetrafluoroethylene packing is provided with an annular plate, and one side of the annular plate is provided with a sliding block;

[0015] A plurality of nitrogen inlets and at least one exhaust port are arranged on one side of the outer cover plate.

[0016] In a preferred embodiment of the present invention, a first O-type rubber ring is provided between the outer cover plate and the sealing carrier.

[0017] In a preferred embodiment of the present invention, a straight-through pressure-injection oil cup is provided on the top of the cylindrical rolling body.

[0018] In a preferred embodiment of the present invention, a rectangular rubber ring is provided between the sealing carrier and the sealing dynamic ring, and a second O-type rubber ring is padded on the lower side of the rectangular rubber ring.

[0019] In a preferred embodiment of the present invention, a floating gap is provided between the sealing carrier and the sealing dynamic ring, and the size of the floating gap is 2-5 mm.

[0020] In a preferred embodiment of the present invention, a connecting hole is provided inside the sliding block, and the connecting hole is connected to the nitrogen inlet.

[0021] In a preferred embodiment of the present invention, a rectangular spring is disposed on the outer side of the sliding block, and one end of the rectangular spring abuts against one side of the outer cover plate.

[0022] In a preferred embodiment of the present invention, a second ceramic fiber packing is disposed at one end of the outer cover plate, the second ceramic fiber packing is disposed at the bottom of the sealing carrier and the sealing dynamic ring, and a packing pressing plate is disposed at one end of the second ceramic fiber packing.

[0023] In a preferred embodiment of the present invention, a cylindrical rolling body and a polytetrafluoroethylene isolation block are provided on the sealing carrier. The polytetrafluoroethylene isolation block is placed between two cylindrical rolling bodies to limit the freedom of movement of the sealing dynamic ring.

[0024] In a preferred embodiment of the present invention, it also includes a nitrogen control regulation loop, which includes multiple sub-loops, and the multiple sub-loops correspond to multiple nitrogen inlets one by one. The sub-loops respectively control the nitrogen amount and nitrogen pressure of the nitrogen inlet.

[0025] The above technical solution of the present invention has the following advantages compared with the prior art:

[0026] The present application adopts a multi-stage combined sealing structure to construct a buffer circuit from high temperature to low temperature, which isolates and weakens tiny dust multiple times to achieve an efficient and durable sealing mechanism, greatly improving the sealing performance and lifespan.

[0027] By setting up a nitrogen control regulation loop, the waste of gas usage is effectively reduced, real-time feedback regulation is performed, and the overall cooling efficiency is improved.

[0028] The heat generated by the friction between the sealing ring and the carbide surface is taken away through the exhaust port, which increases the service life of the sealing ring. At the same time, the grease or dust that penetrates into the airtight belt due to severe pressure fluctuations is quickly removed.

[0029] The highly integrated component design integrates the adaptive adjustment, space limit, isolation ring and other parts of the sealing component into a component module. When replacement is needed, the entire component can be disassembled and replaced with a new one, which significantly shortens the construction time.

[0030] Modular design can unify design standards during design, realize standardized series manufacturing, centrally and quickly produce various models, unify testing standards, and effectively improve production efficiency and product quality.

[0031] The second O-type rubber ring is combined with the rectangular rubber ring and overlapped to achieve both automatic compensation for wear and high sealing capability.

[0032] The gap maintenance of the sealing device adopts the design of cylindrical rolling element and polytetrafluoroethylene isolation block. The dynamic and static separation is achieved through the rolling of the cylindrical rolling element, and the runout is absorbed through the connected soft connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, some of the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a cross-sectional schematic diagram of an integrated modular high-pressure mechanical sealing device for a lithium battery negative electrode high-temperature rotary kiln according to an embodiment of the present invention;

[0035] Figure 2 It is a schematic diagram of a local method of a cylindrical rolling body according to an embodiment of the present invention;

[0036] Figure 3 It is a schematic diagram of the connection of the nitrogen control regulation circuit according to an embodiment of the present invention.

[0037] In the figure: 1, outer cover plate, 2, rectangular spring, 3, sliding block, 4, annular plate, 5, first ceramic fiber packing, 6, polytetrafluoroethylene packing, 7, first O-type rubber ring, 8, sealing carrier, 9, straight-through pressure injection oil cup, 10, cylindrical rolling element, 11, skeleton oil seal, 12, V-shaped sealing ring, 13, sealing dynamic ring, 14, rectangular rubber ring, 15, second O-type rubber ring, 16, packing pressure plate, 17, second ceramic fiber packing, 18, polytetrafluoroethylene isolation block. DETAILED DESCRIPTION

[0038] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0040] Embodiment 1

[0041] See also Figure 1-Figure 3As shown, the present invention proposes an integrated modular high-pressure mechanical sealing device for a lithium battery negative electrode high-temperature rotary kiln, comprising: an outer cover plate 1 and a sealing carrier 8 fixedly mounted on one side of the outer cover plate 1;

[0042] A sealing dynamic ring 13 is arranged on one side of the sealing carrier 8, and a plurality of cylindrical rolling bodies 10 are arranged between the top of the sealing dynamic ring 13 and the sealing carrier 8;

[0043] The sealing carrier 8 is provided with a first ceramic fiber packing 5 and a polytetrafluoroethylene packing 6, and the ceramic fiber packing is used to block high-temperature hot smoke;

[0044] An annular plate 4 is disposed on one side of the first ceramic fiber packing 5 and the polytetrafluoroethylene packing 6, and a sliding block 3 is disposed on one side of the annular plate 4;

[0045] One side of the outer cover plate 1 is provided with a plurality of nitrogen inlets and at least one exhaust port.

[0046] It should be noted that the multiple nitrogen inlets include port A, port B, port C and port D1, the exhaust port is port D2, multiple ports D1 and D2 are arranged side by side, port D1 and port D2 correspond one to one, and independent flow channels are arranged inside. The outer cover plate 1 is connected to the soft connection on the unloading cover. The sealing carrier 8 is installed on the outer cover plate 1 by screws, and a first O-type rubber ring 7 is arranged between the outer cover plate 1 and the sealing carrier 8 to prevent the nitrogen (0.4-0.5MPa) introduced from the D1 / D2 port from leaking between the joint surfaces. The sealing carrier 8 is installed with a first ceramic fiber packing 5, a polytetrafluoroethylene packing 6, a rectangular sealing ring, a second O-type sealing ring and a rolling body.

[0047] D1 / D2 ports are the air-tight belt inlet and outlet ports, D1 for air intake and D2 for exhaust. After nitrogen is introduced, a positive pressure belt is formed between the polytetrafluoroethylene packing 6 and the rectangular rubber ring 14. The pressure is generally between 0.4-0.5Mpa and needs to be greater than the pressure of the B / C port (0.2-0.3Mpa). The introduced gas is guided through the internal gap and takes away a small amount of infiltrated grease and dust. Since the thermal conductivity of polytetrafluoroethylene is extremely low, and the friction between the rubber ring and the alloy surface will generate a large amount of friction heat, the nitrogen introduced into the D port also cools these joint surfaces at the same time. The design of the end face high-pressure airtight belt forms a positive pressure protection zone to prevent the invasion of external gas, isolate internal dust and harmful gas leakage.

[0048] The first ceramic fiber packing 5 is used to block the high-temperature hot flue gas to prevent the hot flue gas from directly contacting the outer polytetrafluoroethylene packing 6 when the pressure fluctuates, causing the packing to burn and the seal to fail. Polytetrafluoroethylene has self-lubricating properties and has high wear resistance when rubbing against the mating surface. It is one of the commonly used materials for mechanical end face seals. However, since the safe use temperature of polytetrafluoroethylene should generally be lower than 150 degrees Celsius, it can be used at around 200 degrees Celsius in a short period of time. When the high-temperature rotary kiln is running, the temperature of the internal hot flue gas is between 900-1000 degrees Celsius. Therefore, certain measures need to be taken to cool the sealing carrier 8 and the sealing dynamic ring 13. Since the atmosphere in the kiln needs to maintain an extremely low oxygen content and no other polluting substances can penetrate, this application uses nitrogen as a cooling method.

[0049] According to the embodiment of the present invention, a first O-type rubber ring 7 is arranged between the outer cover plate 1 and the sealing carrier 8 .

[0050] According to the embodiment of the present invention, a straight-through pressure-injection oil cup 9 is disposed on the top of the cylindrical rolling body 10 .

[0051] According to the embodiment of the present invention, a rectangular rubber ring 14 is provided between the sealing carrier 8 and the sealing dynamic ring 13, and a second O-type rubber ring 15 is provided under the rectangular rubber ring 14. The second O-type rubber ring 15 is used to generate deformation to increase the wear compensation amount. The rubber ring is made of fluororubber or silicone rubber, which maintains good rubber properties at a temperature of 200°C and maintains excellent sealing performance.

[0052] According to the embodiment of the present invention, a floating gap is provided between the sealing carrier 8 and the sealing dynamic ring 13, and the size of the floating gap is 2-5 mm.

[0053] It should be noted that the floating gap between the sealing carrier 8 and the sealing dynamic ring 13 is used to absorb errors during installation, processing and operation.

[0054] It should be noted that the first ceramic fiber packing 5 and the polytetrafluoroethylene packing 6 are both pressurized by nitrogen, and a connecting hole is provided on the sliding block 3 so that the pressure on both sides is the same. However, since the effective area on one side is relatively large, a differential force is formed on the sliding block 3, pushing the slider to press the annular plate 4. The annular plate 4 evenly applies the pressing force of the sliding block 3 to the sealing packing, so that the packing fits tightly with the sealing dynamic ring 13. A rectangular spring 2 (large diameter and high rigidity) is provided between the sliding plug and the cover plate to stabilize the plug when there is no air pressure, and to provide pre-tightening for the packing that needs to be tightened. The sealing dynamic ring 13 is made of alloy steel, and the width of the boss at the junction with the packing must be greater than the width of the packing to avoid the hard ring being embedded in the soft ring due to wear.

[0055] According to the embodiment of the present invention, a connecting hole is provided inside the sliding block 3 , and the connecting hole is connected to the nitrogen inlet.

[0056] According to the embodiment of the present invention, a rectangular spring 2 is disposed outside the sliding block 3 , and one end of the rectangular spring 2 abuts against one side of the outer cover plate 1 .

[0057] According to the embodiment of the present invention, a second ceramic fiber packing 17 is provided at one end of the outer cover plate 1 , and the second ceramic fiber packing 17 is arranged at the bottom of the sealing carrier 8 and the sealing dynamic ring 13 . A packing pressing plate 16 is provided at one end of the second ceramic fiber packing 17 .

[0058] It should be noted that a certain amount of nitrogen is introduced from port A, with a pressure of 0.05Mpa-0.2Mpa, and the heat on the components is taken away through the guide holes on the sealing carrier 8 and the sealing dynamic ring 13, and a certain pressure difference is formed by the second ceramic fiber packing 17 and the packing gland blocking the gap, and the hot flue gas in the gap is blown away through the guide holes on the sealing dynamic ring 13. In addition, a certain amount of internal insulation material needs to be filled on the rotating cylinder to isolate the heat. After cooling by the nitrogen system, the temperature at the seal can basically be stabilized at around 100°C.

[0059] According to an embodiment of the present invention, a rolling body and a polytetrafluoroethylene isolation block are provided on the sealing carrier. The polytetrafluoroethylene isolation block is placed between two cylindrical rolling bodies to limit the freedom of movement of the sealing dynamic ring 13. Figure 2 As shown, the polytetrafluoroethylene isolation block is spaced apart from the cylindrical rolling element.

[0060] It should be noted that the sealing dynamic ring 13 is fixed by the rolling body and the polytetrafluoroethylene isolation block 18, leaving only the freedom to rotate around the central axis. When the sealing dynamic ring 13 rotates, its circular runout will increase as the temperature of the cylinder increases. The sealing dynamic ring 13 rotates with the rolling body to drive the sealing carrier 8 and the outer cover plate 1 to run together and absorb the runout through the soft connection connected to the outer cover plate 1. The rolling body needs to be lubricated with an appropriate amount of high-temperature grease through a straight-through oil cup (other types of oil cups can be replaced when negative pressure is present), and an oil film is formed between the rolling groove and the rolling body and the polytetrafluoroethylene isolation block 18 to reduce wear, and the skeleton oil seal 11, V-shaped sealing ring 12 and rectangular sealing ring are used to isolate the grease.

[0061] According to an embodiment of the present invention, a nitrogen control regulation loop is further included, and the nitrogen control regulation loop includes multiple sub-loops, and the multiple sub-loops correspond to multiple nitrogen inlets one by one, and the sub-loops respectively control the nitrogen amount and nitrogen pressure of the nitrogen inlet.

[0062] It should be noted that an infrared temperature sensor is provided on one side of the sealing dynamic ring 13 to monitor the dynamic ring temperature in real time. The required nitrogen flow rate is determined by the detected temperature analog signal, and then a closed-loop control circuit is formed through the proportional control valve and the flow detector. When the rotary kiln is running at a low temperature, a small amount of nitrogen is introduced to cool it down. When the temperature rises, the nitrogen usage is gradually increased according to the temperature.

[0063] In the nitrogen control and regulation loop, a two-position two-way solenoid valve with dual electric control (which can remain in place after power failure) is used in front of the B / C interface to control the nitrogen entry, and a manual valve bypass is set for the solenoid valve as a backup. Proportional solenoid valves and flow detectors are used in front of the A / D 1 interface to coordinately control the input flow according to the cooling needs, and a manual valve bypass is set for backup. D2 is the exhaust outlet of the airtight belt. The exhaust port is connected to a gas filter and an oil separator to filter out grease, dust, grinding chips and other impurities brought out during the pressure relief process of the airtight belt to avoid clogging subsequent processing components. A pressure reducing valve is installed after the D2 exhaust port filter device to stabilize the sealing belt pressure and form a sealed high-pressure area. The nitrogen discharged afterwards can be reused in an additional recovery system, or it can be directly discharged into the exhaust gas treatment system of the main equipment to avoid direct discharge into the surrounding environment.

[0064] In summary, the present application adopts a multi-stage combined sealing structure to construct a buffer circuit from high temperature to low temperature, isolates and weakens tiny dust multiple times, realizes an efficient and durable sealing mechanism, and greatly improves the sealing performance and lifespan.

[0065] By setting up a nitrogen control regulation loop, the waste of gas usage is effectively reduced, real-time feedback regulation is performed, and the overall cooling efficiency is improved.

[0066] The heat generated by the friction between the sealing ring and the carbide surface is taken away through the exhaust port, which increases the service life of the sealing ring. At the same time, the grease or dust that penetrates into the airtight belt due to severe pressure fluctuations is quickly removed.

[0067] The highly integrated component design integrates the adaptive adjustment, space limit, isolation ring and other parts of the sealing component into a component module. When replacement is needed, the entire component can be disassembled and replaced with a new one, which significantly shortens the construction time.

[0068] Modular design can unify design standards during design, realize standardized series manufacturing, centrally and quickly produce various models, unify testing standards, and effectively improve production efficiency and product quality.

[0069] The second O-type rubber ring 15 and the rectangular rubber ring 14 are combined and stacked, and both automatic wear compensation and high sealing ability are taken into account.

[0070] The gap of the sealing device is maintained by adopting the design of cylindrical rolling body 10 and polytetrafluoroethylene isolation block 18. The cylindrical rolling body 10 and the polytetrafluoroethylene isolation block 18 are arranged at intervals. The dynamic and static separation is achieved through the rolling of the cylindrical rolling body 10, and the runout is absorbed by the connected soft connection.

[0071] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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.

[0072] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to the above embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the above embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0073] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An integrated modular high-pressure mechanical sealing device for a lithium battery negative electrode high-temperature rotary kiln, comprising: An outer cover plate and a sealing carrier fixedly mounted on one side of the outer cover plate; characterized in that: A sealing dynamic ring is arranged on one side of the sealing carrier, and a plurality of cylindrical rolling bodies are arranged between the top of the sealing dynamic ring and the sealing carrier; The sealing carrier is provided with a first ceramic fiber packing and a polytetrafluoroethylene packing, wherein the ceramic fiber packing is used to block high-temperature hot smoke; One side of each of the first ceramic fiber packing and the polytetrafluoroethylene packing is provided with an annular plate, and one side of the annular plate is provided with a sliding block; A plurality of nitrogen inlets and at least one exhaust port are arranged on one side of the outer cover plate.

2. The integrated modular high-pressure mechanical sealing device for lithium battery negative electrode high-temperature rotary kiln according to claim 1, characterized in that: A first O-type rubber ring is arranged between the outer cover plate and the sealing carrier.

3. The integrated modular high-pressure mechanical sealing device for lithium battery negative electrode high-temperature rotary kiln according to claim 2, characterized in that: A straight-through pressure-injection oil cup is arranged on the top of the cylindrical rolling body.

4. The integrated modular high-pressure mechanical sealing device for lithium battery negative electrode high-temperature rotary kiln according to claim 1, characterized in that: A rectangular rubber ring is arranged between the sealing carrier and the sealing dynamic ring, and a second O-type rubber ring is padded on the lower side of the rectangular rubber ring.

5. The integrated modular high-pressure mechanical sealing device for lithium battery negative electrode high-temperature rotary kiln according to claim 1, characterized in that: A floating gap is provided between the sealing carrier and the sealing dynamic ring, and the size of the floating gap is 2-5 mm.

6. The integrated modular high-pressure mechanical sealing device for lithium battery negative electrode high-temperature rotary kiln according to claim 1, characterized in that: A connecting hole is arranged inside the sliding block, and the connecting hole is communicated with the nitrogen inlet.

7. The integrated modular high-pressure mechanical sealing device for lithium battery negative electrode high-temperature rotary kiln according to claim 1, characterized in that: A rectangular spring is arranged on the outer side of the sliding block, and one end of the rectangular spring is pressed against one side of the outer cover plate.

8. The integrated modular high-pressure mechanical sealing device for lithium battery negative electrode high-temperature rotary kiln according to claim 1, characterized in that: A second ceramic fiber packing is arranged at one end of the outer cover plate, the second ceramic fiber packing is arranged at the bottom of the sealing carrier and the sealing dynamic ring, and a packing pressing plate is arranged at one end of the second ceramic fiber packing.

9. The integrated modular high-pressure mechanical sealing device for lithium battery negative electrode high-temperature rotary kiln according to claim 1, characterized in that: The sealing carrier is provided with a cylindrical rolling body and a polytetrafluoroethylene isolation block. The polytetrafluoroethylene isolation block is placed between two cylindrical rolling bodies and is used to limit the freedom of movement of the sealing dynamic ring.

10. The integrated modular high-pressure mechanical sealing device for lithium battery negative electrode high-temperature rotary kiln according to claim 1, characterized in that: It also includes a nitrogen control regulation loop, which includes multiple sub-loops, and the multiple sub-loops correspond to multiple nitrogen inlets one by one. The sub-loops respectively control the nitrogen amount and nitrogen pressure of the nitrogen inlet.

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