An efficient and environmentally friendly lithium battery positive electrode material sintering furnace production line

Abstract

The present invention discloses an efficient and environmentally friendly lithium battery positive electrode material sintering furnace production line, comprising a furnace body, an outer furnace rotary line, an exhaust gas treatment device, and an automatic measurement and control operation station. The furnace body is spliced ​​by multiple modules, the outer furnace rotary line is provided with a sagger detection and deviation alarm device, the exhaust gas treatment device is connected to the exhaust gas main pipe, and the exhaust gas is discharged after filtering and purification, and the automatic measurement and control operation station is connected to an online atmosphere detection device; multiple heating devices optimize energy selection and reduce production costs, and the sintering cleanliness of lithium battery positive electrode materials is ensured by optimizing the furnace lining, and the furnace body structure adopts multiple modules, which can be flexibly adjusted according to production output and is easy to replace and install. The automatic measurement and control operation station makes the control operation simple and intuitive, so that the temperature in the kiln is stable, the atmosphere is uniform, the sintering time is shortened, and the output and quality are effectively improved. By efficiently purifying and filtering the exhaust gas, it is ensured that the discharged exhaust gas meets national standards and reduces pollution to the environment.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery positive electrode material production equipment, in particular to a high-efficiency and environmentally friendly lithium battery positive electrode material sintering furnace production line. Background Art

[0002] Lithium batteries, with their high energy density, low discharge rate, high voltage, and environmentally friendly characteristics, are widely used in various fields, including new energy vehicles and communications. Currently, the new energy industry has a strong demand for lithium-ion batteries. The quality of the positive electrode material is a key factor in determining the electrochemical and safety performance of lithium-ion batteries. Lithium battery positive electrode materials must be roasted in high-temperature kilns, using saggers for loading. Sintering is a critical step in the production process.

[0003] The existing sintering furnaces for lithium-ion battery positive electrode materials have complex furnace structures, are inconvenient to operate, and have poor sealing. The atmosphere protection accuracy is low and unstable, which not only increases production costs, but also results in poor consistency and low pass rate of sintered products. The inaccurate control makes the performance of the positive electrode materials unable to meet the process requirements, resulting in a waste of resources and energy. Different waste gases are also generated during the production and sintering of positive electrode materials. The waste gases contain dust and heavy metals. If they are not treated or purified completely before being discharged, they will cause air, water and soil pollution, seriously endangering the environment. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-efficiency and environmentally friendly lithium battery positive electrode material sintering furnace production line to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-efficiency and environmentally friendly lithium battery positive electrode material sintering furnace production line, including a furnace body, a furnace outer rotary line, an exhaust gas treatment device, and an automatic measurement and control operation station. The furnace body is flexibly and quickly spliced ​​by multiple modules, and quick sealing fasteners are installed between the modules. Each module includes a furnace outer frame, a furnace inner lining, a furnace foot roller device, and a ground rail slide. According to the running direction of the sintering furnace, a preheating zone, a heating zone, a constant temperature sintering zone, a first cooling zone, and a second cooling zone are provided. The furnace body is provided with a furnace transmission roller shaft, and a transmission device is provided on the side outside the furnace. The furnace is equipped with a transmission station, and heating devices are respectively provided at the upper and lower parts of the furnace; the outer rotary line of the furnace includes an inlet roller table, an outlet roller table, a furnace tail transverse roller table, a furnace front transverse roller table, a furnace outer longitudinal roller table, and a sagger, and a sagger detection and deviation alarm device is provided on the outer side of the furnace tail transverse roller table. The air inlet end of the exhaust gas treatment device is connected to the exhaust gas main pipe, the exhaust gas branch pipe is connected to the exhaust gas main pipe, and an exhaust gas main pipe cleaning device is provided; the automatic measurement and control operation station is respectively connected with the furnace temperature measuring device, the furnace pressure measuring device, the pipeline temperature measuring device, the pipeline pressure measuring device and the online atmosphere detection device.

[0006] As a further solution of the present invention: a protective gas injection device and an in-furnace pressure measuring device are provided on the upper side of the furnace body, an in-furnace temperature measuring device is provided on the top of the furnace, and pressure-stabilizing sealing door devices are provided at the front and rear inlet and outlet ends of the furnace body respectively.

[0007] As a further solution of the present invention: roller sealing cabins are provided in the middle of both sides of the furnace outer frame, and heating sealing cabins are provided at the upper and lower parts of the side surfaces respectively.

[0008] As a further solution of the present invention: the heating device adopts an electric heating tube or a gas heat radiation tube.

[0009] As a further solution of the present invention: the transmission rollers in the furnace are made of high-temperature alloy, ceramic, or silicon carbide according to different partitions.

[0010] As a further solution of the present invention: the inner working surface of the furnace lining adopts high-temperature resistant high-purity alumina material, and the top arch adopts a micro-arc structure.

[0011] Compared with the prior art, the beneficial effects of the present invention are: the present invention optimizes energy selection and reduces production costs through a variety of heating devices; ensures the cleanliness of the sintering of lithium battery positive electrode materials by optimizing the furnace lining; adopts multiple module furnace structures that can be flexibly adjusted according to production, and are easy to replace and install, and uses advanced computer control systems to make the operation of the kiln simple and intuitive, and fully guarantee the stability of the control process, maintain stable temperature in the kiln, uniform atmosphere, more uniform and smooth hot air flow, more sufficient and reasonable heat exchange, shorten the sintering time, and effectively improve production and quality; by efficiently purifying and filtering the exhaust gas, it is ensured that the discharged exhaust gas meets national standards and reduces atmospheric pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of an efficient and environmentally friendly lithium battery positive electrode material sintering furnace production line.

[0013] Figure 2 This is a cross-sectional schematic diagram of an efficient and environmentally friendly lithium battery positive electrode material sintering furnace production line.

[0014] Figure 1: Furnace body; 2: Preheating zone; 3: Heating zone; 4: Constant temperature sintering zone; 5: First stage cooling zone; 6: Second stage cooling zone; 7: Inlet roller table; 8: Outlet roller table; 9: External rotary line; 10: Lateral roller table; 11: Front roller table; 12: Automatic measurement and control operation station; 13: Exhaust gas branch pipe; 14: Exhaust gas main pipe; 15: Exhaust gas main pipe cleaning device; 16: Exhaust gas treatment device; 17: Temperature measuring device inside the furnace; 18: Pressure measuring device inside the furnace; 19: Pipeline temperature measuring device Device; 20. Pipeline pressure measuring device; 21. Transmission device; 22. Sagger; 23. Transmission roller in the furnace; 24. Furnace lining; 25. External furnace frame; 26. Heating device; 27. Pressure-stabilizing sealing door device; 28. Roller sealing cabin; 29. ​​Heating sealing cabin; 30. Protective gas injection device; 31. Furnace foot roller device; 32. Ground rail slide; 33. Sagger detection and deviation alarm device; 34. Transmission station; 35. Online atmosphere detection device; 36. External furnace longitudinal roller table. DETAILED DESCRIPTION

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] See also Figures 1-2 In an embodiment of the present invention, a high-efficiency and environmentally friendly lithium battery positive electrode material sintering furnace production line includes a furnace body 1, an outer furnace rotary line 9, an exhaust gas treatment device 16, and an automatic measurement and control operation station 12. The furnace body 1 is flexibly and quickly spliced ​​by multiple modules, and a quick sealing fastener is installed between the modules. Each module includes a furnace outer frame 25, a furnace lining 24, a furnace foot roller device 31, and a ground rail slide 32. The sintering furnace is divided into a preheating zone 2, a heating zone 3, a constant temperature sintering zone 4, a first cooling zone 5, and a second cooling zone 6 according to the running direction of the sintering furnace. The furnace body 1 is provided with an inner furnace transmission roller 23, a transmission device 21 and a transmission station 34 on the outer side of the furnace, and at the upper part of the furnace and the lower part are respectively provided with a heating device 26; the outer furnace rotary line 9 includes an inlet roller table 7, an outlet roller table 8, a furnace tail transverse roller table 10, a furnace front transverse roller table 11, an outer furnace longitudinal roller table 36, and a sagger 22. A sagger body detection and deviation alarm device 33 is provided on the outer side of the furnace tail transverse roller table 10. The air inlet end of the exhaust gas treatment device 16 is connected to the exhaust gas main pipe 14, and the exhaust gas branch pipe 13 is connected to the exhaust gas main pipe 14, and an exhaust gas main pipe cleaning device 15 is provided; the automatic measurement and control operation station 12 is respectively connected with the furnace temperature measuring device 17, the furnace pressure measuring device 18, the pipeline temperature measuring device 19, the pipeline pressure measuring device 20 and the online atmosphere detection device 35.

[0017] The upper side of the furnace body 1 is provided with a protective gas injection device 30 and a furnace pressure measuring device 18, the top of the furnace is provided with a furnace temperature measuring device 17, and the front and rear inlet and outlet ends of the furnace body 1 are respectively provided with pressure-stabilizing sealing door devices 27.

[0018] A roller sealing cabin 28 is provided in the middle of both sides of the furnace outer frame 25, and a heating sealing cabin 29 is provided at the upper and lower parts of the side surfaces respectively.

[0019] The heating device 26 is an electric heating tube or a gas heat radiation tube.

[0020] The transmission rollers 23 in the furnace are made of high-temperature alloy, ceramic, or silicon carbide according to different partitions.

[0021] The inner working surface of the furnace lining 24 is made of high-temperature resistant high-purity alumina material, and the top arch adopts a micro-arc structure.

[0022] The sagger 22 containing the lithium battery positive electrode raw materials is placed on the furnace inlet roller table 7 and pushed toward the furnace body 1. It passes through the pressure-stabilizing sealing door device 27 and the transmission roller shaft 23 in the furnace according to the preset process requirements and temperature curve, and automatically moves from the preheating zone 2, the heating zone 3, the constant temperature sintering zone 4, the first cooling zone 5, and the second cooling zone 6 to the furnace outlet roller table 8. After unloading, it passes through the sagger detection and deviation alarm device 33 at the furnace tail transverse roller table 10 and enters the furnace outer longitudinal roller table 36. Then, it is transferred to the furnace front transverse roller table 11 to complete the loading and enter the next sintering cycle. The exhaust gas generated by the heating device 26 of the furnace body 1 is connected to the exhaust gas main pipe 14 from the exhaust gas branch pipe 13 and is filtered and purified by the exhaust gas treatment device 16 to meet the standards before being discharged. The exhaust gas main pipe cleaning device 15 regularly processes the residue in the exhaust gas main pipe 14 to keep the main pipe unobstructed; the automatic measurement and control operation station 12 automatically monitors and controls the temperature and pressure of the furnace in a timely manner through the furnace temperature measuring device 17, the pipeline temperature measuring device 19, the furnace pressure measuring device 18 and the pipeline pressure measuring device 20. The detection parameters of the online atmosphere detection device 35 are fed back to the automatic measurement and control operation station 12, and the automatic measurement and control operation station 12 adjusts the protective gas injection device 30 to automatically and accurately adjust the atmosphere of the furnace body 1; the heating device 26 needs to use electric heating tubes or gas heat radiation tubes according to the energy structure to optimize energy selection and reduce production costs; the inner working surface of the furnace lining 24 adopts high-temperature resistant high-purity alumina material to ensure the sintering cleanliness of the lithium battery positive electrode material; the multiple module furnace body 1 structure can be flexibly adjusted according to production, and is easy to replace and install. The use of advanced computer control systems makes the operation of the kiln simple and intuitive, and fully guarantees the stability of the control process, maintains stable temperature in the kiln, uniform atmosphere, more uniform and smooth hot air flow, more sufficient and reasonable heat exchange, shortens sintering time, and effectively improves production and quality; through efficient purification and filtration of exhaust gas, it is ensured that the discharged exhaust gas meets national standards and reduces atmospheric pollution.

[0023] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-efficiency and environmentally friendly lithium battery positive electrode material sintering furnace production line, comprising a furnace body (1), an external furnace rotation line (9), an exhaust gas treatment device (16), and an automatic measurement and control operation station (12), characterized in that: The furnace body (1) is composed of a plurality of modules that are flexibly and quickly assembled, and quick sealing fasteners are installed between the modules. Each module includes a furnace outer frame (25), a furnace inner lining (24), a furnace foot roller device (31), and a ground rail slide (32). According to the running direction of the sintering furnace, a preheating zone (2), a heating zone (3), a constant temperature sintering zone (4), a first stage cooling zone (5), and a second stage cooling zone (6) are provided. The furnace body (1) is provided with a furnace inner transmission roller (23), a transmission device (21) and a transmission station (34) on one side outside the furnace, and a heating device (26) is provided at the upper and lower parts of the furnace respectively. The outer furnace rotary line (9) includes an inlet roller table (7), an outlet roller table (8), and a conveyor belt (9). A roller table (8), a furnace tail transverse roller table (10), a furnace front transverse roller table (11), a furnace outer longitudinal roller table (36), and a sagger (22); a sagger body detection and deviation alarm device (33) is provided on the outer side of the furnace tail transverse roller table (10); an exhaust gas treatment device (16) has an air inlet end connected to an exhaust gas main pipe (14); an exhaust gas branch pipe (13) is connected to the exhaust gas main pipe (14), and an exhaust gas main pipe cleaning device (15) is provided; and the automatic measurement and control operation station (12) is respectively connected to a furnace temperature measuring device (17), a furnace pressure measuring device (18), a pipeline temperature measuring device (19), a pipeline pressure measuring device (20), and an online atmosphere detection device (35).

2. The efficient and environmentally friendly lithium battery positive electrode material sintering furnace production line according to claim 1, characterized in that: The upper side of the furnace body (1) is provided with a protective gas injection device (30) and a furnace pressure measuring device (18), the top of the furnace is provided with a furnace temperature measuring device (17), and the front and rear inlet and outlet ends of the furnace body (1) are respectively provided with pressure-stabilizing sealing door devices (27).

3. The efficient and environmentally friendly lithium battery positive electrode material sintering furnace production line according to claim 1, characterized in that: The middle portions of both sides of the furnace outer frame (25) are provided with roller sealing cabins (28), and the upper and lower portions of the side surfaces are provided with heating sealing cabins (29), respectively.

4. The high-efficiency and environmentally friendly lithium battery positive electrode material sintering furnace production line according to claim 1, characterized in that: The heating device (26) adopts an electric heating tube or a gas heat radiation tube.

5. The efficient and environmentally friendly lithium battery positive electrode material sintering furnace production line according to claim 1, characterized in that: The transmission rollers (23) in the furnace are made of high-temperature alloy, ceramic, or silicon carbide according to different partitions.

6. The efficient and environmentally friendly lithium battery positive electrode material sintering furnace production line according to claim 1, characterized in that: The inner working surface of the furnace lining (24) is made of high-temperature resistant high-purity alumina material, and the top arch adopts a micro-arc structure.

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