Discharging, scattering and conveying device for high-temperature coating reaction kettle

Abstract

The invention discloses a discharging, scattering and conveying device for a high-temperature coating reaction kettle. The discharging, scattering and conveying device comprises a depolymerizing and scattering machine, a feeding device and a discharging device, wherein the depolymerizing and scattering machine is used for depolymerizing and scattering uncooled materials discharged to a scattering bin from the high-temperature coating reaction kettle; a feeding hole of the scattering bin is connected with a discharging valve of the high-temperature coating reaction kettle; the scraper conveyor is used for conveying the scattered and uncooled materials to the pre-carbonization equipment; a conveyor feed port of the scraper conveyor is connected with a discharge port of the scattering bin, and a conveyor discharge port of the scraper conveyor is connected with a feed port of the pre-carbonization equipment. The process flow is optimized, high-temperature materials can be directly scattered and conveyed, the materials do not need to be cooled, energy consumption and waste are reduced, and the cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium battery production, and particularly relates to a discharging, dispersing and conveying device for a high-temperature coating reaction kettle. Background Art

[0002] At present, the main processes for high-temperature coating granulation and subsequent treatment in the lithium battery anode material industry are as follows: after the materials are coated and granulated in a high-temperature coating reaction kettle (~650 °C), they enter a cooling kettle for stirring and cooling. After cooling, the materials (<100 °C) are depolymerized and dispersed, and then are transported to a pre-carbonization process (1000 - 1100 °C) for heating and carbonization treatment by using a powder pneumatic conveying system or a ton bag transfer. On the one hand, this process involves heating up, cooling down, and heating up again, resulting in waste of energy consumption; on the other hand, it takes a long time (about 5h) for a batch of materials to be cooled to <100 °C in the cooling kettle, reducing the production line usage efficiency. The discharging temperature of the coating kettle is as high as 650 °C. At present, the conveying connectors and the end dust collection filter bags of the traditional powder pneumatic conveying system cannot meet the performance requirements for use at this high temperature, and cannot directly pneumatically convey the high-temperature powder of the coating reaction kettle to the pre-carbonization process.

[0003] The high-temperature anode material coming out of the high-temperature reaction kettle contains tar volatile gases, which are likely to cool and adhere to the conveying pipeline during transportation, causing pipe blockage, and it is difficult to repair and clean out the conveying equipment.

[0004] The high-temperature reaction kettle uses high-temperature heating to melt asphalt and coat it on the surface of the anode raw material. Although there is a stirring shaft in the kettle to mix and disperse during the reaction process, some materials will still agglomerate into lumps. Currently, the mainstream process is to roughly break and disperse the materials at the outlet of the high-temperature reaction kettle, and further depolymerize and disperse them after cooling, which requires a two-stage dispersion process. Summary of the Invention

[0005] To solve the deficiencies in the prior art, the invention provides a discharging, dispersing and conveying device for a high-temperature coating reaction kettle, which optimizes the technological process, can directly disperse and convey high-temperature materials without cooling the materials, reduces waste of energy consumption, and lowers costs.

[0006] To achieve the above object, the technical solution adopted by the invention is: a discharging, dispersing and conveying device for a high-temperature coating reaction kettle, comprising: a depolymerization and dispersion machine for depolymerizing and dispersing the uncooled materials discharged from the high-temperature coating reaction kettle into a dispersion bin; the feed inlet of the dispersion bin is connected to the discharge valve of the high-temperature coating reaction kettle; a scraper conveyor for conveying the uncooled materials after dispersion to a pre-carbonization device; the conveyor feed inlet of the scraper conveyor is connected to the discharge outlet of the dispersion bin, and the conveyor discharge outlet of the scraper conveyor is connected to the feed inlet of the pre-carbonization device.

[0007] In the above technical solution, by directly connecting the dispersing bin to the discharge port of the high-temperature coating reactor, the material is dispersed by a depolymerization and dispersing machine and conveyed to the pre-carbonization equipment by a scraper conveyor, optimizing the process flow. The high-temperature material can be directly dispersed and conveyed without cooling the material, reducing energy consumption waste and lowering costs.

[0008] Further, the depolymerization and dispersing machine includes: a rotating shaft installed in the dispersing bin; a plurality of rotating blades installed on the rotating shaft; and a first motor for driving the rotation of the rotating shaft.

[0009] In the above technical solution, by designing the specific structure of the depolymerization and dispersing machine and using the rotating blades to depolymerize and disperse the material in the dispersing bin, the material does not need to be cooled, reducing energy consumption waste and lowering costs.

[0010] Further, a grille plate is installed in the dispersing bin, and the grille plate is located between the rotating shaft and the discharge port of the dispersing bin; the grille plate and the rotating blades are arranged in an alternating nested manner, and a set spacing is reserved between the grille plate and the rotating blades.

[0011] In the above technical solution, by setting the grille plate, it plays a role in screening the material; by adjusting the spacing between the grille plate and the rotating blades, the particle size of the dispersed finished product can be adjusted according to the production process requirements, improving the product quality.

[0012] Further, the dispersing bin is provided with a first tail gas discharge port.

[0013] In the above technical solution, by providing the first tail gas discharge port in the dispersing bin, the asphalt volatiles and dust-containing tail gas diffused in the dispersing bin can be led out of the system, reducing the adhesion of asphalt tar to the conveying system.

[0014] Further, the scraper conveyor includes: a traction chain; a plurality of scrapers installed on the traction chain at a set spacing and a set angle; a sprocket for driving the traction chain; and a second motor for driving the sprocket and having a set spacing from the bottom plate of the scraper conveyor.

[0015] In the above technical solution, by designing the specific structure of the scraper conveyor and using the scrapers to convey the material, the material does not need to be cooled, reducing energy consumption waste and lowering costs.

[0016] Further, both the first motor and the second motor are variable-frequency motors.

[0017] In the above technical solution, by configuring the first motor and the second motor as variable-frequency motors, the dispersing speed and the conveying speed can be adjusted to coordinate the differences in the material processing capabilities of different equipment, achieving energy-saving production. At the same time, it can prevent the material from accumulating and blocking in a certain equipment, affecting production.

[0018] Furthermore, the scraper conveyor further includes a nitrogen inlet and a second tail gas discharge port.

[0019] In the above technical solution, by providing a nitrogen inlet and a second tail gas discharge port, the air in the equipment is replaced with nitrogen, avoiding the oxidation problem caused by the exposure of the material to the air. At the same time, the asphalt volatiles and dust-containing tail gas diffused in the scraper conveyor can be led out of the system, reducing the adhesion of asphalt tar to the conveying system.

[0020] Furthermore, the end of the scraper is blade-shaped.

[0021] In the above technical solution, by setting the end of the scraper to be blade-shaped, it has a scraping effect while conveying the material, preventing the material from adhering and accumulating on the inner wall of the scraper conveyor.

[0022] Furthermore, the scraper conveyor is provided with a dust-proof cover.

[0023] In the above technical solution, by providing a dust-proof cover, it is convenient to quickly open and disassemble the scraper conveyor, facilitating the maintenance and repair of the conveying device inside the scraper conveyor.

[0024] Furthermore, a trough is provided on the bottom plate of the scraper conveyor.

[0025] In the above technical solution, by providing a trough on the bottom plate of the scraper conveyor, it is convenient for the conveying of materials. At the same time, the trough cooperates with the scraper, facilitating the scraper to scrape the trough, preventing the material from adhering and accumulating.

[0026] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: (1) By providing a dispersing bin, a depolymerization and dispersing machine, and a scraper conveyor, the present invention meets the requirements of depolymerizing and dispersing high-temperature powder materials in a reaction kettle and conveying them, reduces the configuration of the cooling system in the prior art, optimizes the process flow, can directly disperse and convey high-temperature materials without cooling the materials, reduces energy consumption waste, and lowers the cost; (2) The high-temperature powder materials coming out of the high-temperature coating reaction kettle first undergo the shearing and impact of the rotating blades and the bin grid plate of the depolymerization and dispersing machine. While boosting the material conveying, the coated and agglomerated materials are depolymerized and dispersed to the required particle size range, improving the homogeneity of the subsequent pre-carbonized products; (3) The scraper conveyor uses a scraping plate with an inclination angle to scrape and convey the materials forward, which can well solve the problems of adhesion and blockage of the pipeline during the conveying of high-temperature materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of a high-temperature coating reaction kettle discharging, dispersing and conveying device provided by an embodiment of the present invention; Figure 2 is Figure 1 a schematic structural diagram of the depolymerization and dispersion machine in Figure 3 is Figure 1 a schematic structural diagram of the scraper conveyor in Figure 4 is Figure 3 a partial enlarged schematic diagram of In the figure: 1. High-temperature coating reactor; 2. Discharge valve; 3. Dispersing bin; 31. Tail gas discharge port 1; 32. Grille plate; 4. Depolymerization and dispersion machine; 41. Motor 1; 42. Rotating shaft; 43. Rotating blade; 5. Scraper conveyor; 51. Conveyor feed port; 52. Conveyor discharge port; 53. Motor 2; 54. Sprocket; 55. Traction chain; 56. Scraper; 57. Dust hood; 58. Tail gas discharge port 2; 59. Material trough; 510. Nitrogen inlet. Specific embodiments

[0028] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0029] As Figures 1 to 4 shown, a high-temperature coating reactor discharge dispersion and conveying device includes a high-temperature coating reactor 1, a discharge valve 2, a dispersing bin 3, a depolymerization and dispersion machine 4 for depolymerizing and dispersing the uncooled material discharged from the high-temperature coating reactor 1 to the dispersing bin 3, and a scraper conveyor 5 for conveying the dispersed uncooled material to the pre-carbonization equipment. The feed port of the dispersing bin 3 is connected to the discharge valve 2 of the high-temperature coating reactor 1; the conveyor feed port 51 of the scraper conveyor 5 is connected to the discharge port of the dispersing bin 3, and the conveyor discharge port 52 of the scraper conveyor 5 is connected to the feed port of the pre-carbonization equipment.

[0030] The bottom of the high-temperature coating reactor 1 is equipped with a discharge valve 2, which can discharge the material in the high-temperature coating reactor 1 into the dispersing bin 3. The upper part of the dispersing bin 3 is provided with a tail gas discharge port 1 31, and the lower part is nested with a grille plate 32 and a depolymerization and dispersion machine 4. The tail gas discharge port 1 31 can lead out the asphalt volatiles and dust-containing tail gas diffused in the dispersing bin 3 out of the system, reducing the adhesion of asphalt tar to the conveying system. The scraper conveyor 5 is provided with a nitrogen inlet 510, which can displace the air in the dispersing bin 3 and the scraper conveyor 5 before the high-temperature coating reactor 1 discharges materials, and continuously introduce nitrogen during the operation of the system to reduce the oxygen content in the system.

[0031] The depolymerization and dispersion machine 4 includes a first motor 41, a rotating shaft 42, and rotating blades 43. The rotating blades 43 are attached to the rotating shaft 42 at intervals and rotate at high speed driven by the first motor 41 and the rotating shaft 42, impacting and dispersing the flowing material and boosting the material to be conveyed downstream. The rotating shaft 42 is installed above the grid plate 32, and the rotating blades 43 and the grid plate 32 are arranged in an interval nesting manner with a certain distance reserved between them, playing a role in screening the material. Fine powder can directly fall into the dispersion bin 3 through the gaps, and the massive material can enter the dispersion bin 3 only after being impacted and dispersed by the rotating blades 43 to a particle size below the flowing particle size. The mutual shearing movement between the rotating blades 43 and the grid plate 32 can reduce coking and material hanging during the conveying of high-temperature materials, and the distance between them is adjustable. The particle size of the finished product after dispersion can be adjusted by changing the distance between the rotating blades 43 and the grid plate 32. The first motor 41 is a variable-frequency motor with adjustable speed. By adjusting the speed of the rotating blades 43, the dispersion force is changed, effectively controlling the depolymerization, loosening, and uniform dispersion of the material, adjusting the production capacity and the discharge particle size of the depolymerization and dispersion machine 4, and improving the production efficiency and product quality of the depolymerization and dispersion machine 4.

[0032] The dispersed material enters the trough 59 arranged on the inner bottom plate of the scraper conveyor 5. The scraper conveyor 5 includes a conveyor feed inlet 51, a conveyor discharge outlet 52, a second motor 53, sprockets 54, a traction chain 55, scrapers 56, a dust-proof cover 57, a second tail gas discharge port 58, a trough 59, and a nitrogen inlet 510. The scrapers 56 are fixed to the traction chain 55 at a set interval and a set inclination angle. The traction chain 55 is nested on the sprockets 54 at both ends of the scraper conveyor 5. The sprockets 54 are driven by the second motor 53 to drive the traction chain 55 to circulate and rotate inside the scraper conveyor 5. The second motor 53 is configured with variable frequency, and the conveying speed of the material can be adjusted by changing the speeds of the sprockets 54 and the traction chain 55. The installation height of the sprockets 54 is adjustable to adjust the gap between the scrapers 56 and the trough 59 to adapt to the conveying of materials with different degrees of adhesion. The trough 59 is fixedly arranged below the traction chain 55. The scrapers 56 form a set inclination angle with the surface of the trough 59 and push the material in the trough 59 towards the conveyor discharge outlet 52 on the left side of the scraper conveyor 5 during the rotation process. The outer end of the scrapers 56 in contact with the material is processed into a thinner blade shape, which has a scraping effect while conveying the material to prevent the material from adhering and accumulating on the trough 59.

[0033] The dust-proof cover 57 is installed above the scraper conveyor 5, covering the entire upper space of the scraper conveyor 5. The dust-proof cover 57 is set in sections and is connected to the scraper conveyor 5 by quick-opening, which is convenient for quick disassembly to facilitate the maintenance of the internal conveying device. A plurality of second tail gas discharge ports 58 are provided on the dust-proof cover 57 for collecting the dust-containing tail gas generated during the internal material conveying of the scraper conveyor 5, reducing the escape of dust to the external environment. The nitrogen inlet 510 is used to reduce the oxygen content in the system.

[0034] The components of the dispersion bin 3, the depolymerization and dispersion machine 4, and the scraper conveyor 5 that come into contact with the material are all made of high-temperature resistant materials (such as metal materials like steel plates), which ensures the service life of the equipment. At the same time, it meets the requirement of directly transporting the material coming out of the high-temperature coating reactor 1 in a high-temperature state to the downstream process, reducing the supporting of cooling devices in the traditional process and lowering energy consumption and investment costs.

[0035] During use, after the material in the high-temperature coating reactor 1 completes the coating reaction, open the tail gas discharge port 31 of the dispersion bin 3 and the tail gas discharge port 58 on the scraper conveyor 5, and then open the nitrogen inlet 510 to conduct nitrogen replacement inside the system, reducing the oxygen content in the system, lowering the risk of material oxidation, and ensuring the material quality. After that, start the depolymerization and dispersion machine 4 in the dispersion bin 3 and the scraper conveyor 5, and then open the discharge valve 2 to put the material in the high-temperature coating reactor 1 into the dispersion bin 3. Through the screening effect of the gap between the rotating blades 43 on the depolymerization and dispersion machine 4 and the grid plate 32 in the dispersion bin 3, the fine powder directly enters the dispersion bin 3, and the coarse powder is depolymerized and dispersed under the shearing and impact action of the rotating blades 43 and then enters the dispersion bin 3. The dust and tar-containing tail gas in the dispersion bin 3 are led out through the tail gas discharge port 31 by the dust extraction pipeline and the dust extraction fan connected at the rear end, reducing the coking and adhesion of the tar-containing tail gas in the equipment and the escape of transported dust. The dispersed material is unloaded from the dispersion bin 3 onto the trough 59 in the scraper conveyor 5 and is pushed towards the conveyor discharge port 52 by the circulating scraper 56 to complete the material transportation process.

[0036] The operation process of the high-temperature coating reactor 1 is intermittent. The material processed by the depolymerization and dispersion machine 4 needs to be discharged into the scraper conveyor 5 and then transported to the next process. The driving motors supporting both of them are frequency conversion motors, which can adjust the production capacity between the depolymerization and dispersion and the material transportation equipment evenly to prevent material blockage and accumulation in the system.

[0037] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A high-temperature coated reactor discharging, dispersing and conveying device, characterized in that, Including: A depolymerization and dispersion machine (4) for depolymerizing and dispersing the uncooled material discharged from the high-temperature coating reactor (1) into the dispersion bin (3); the feed inlet of the dispersion bin (3) is connected to the discharge valve (2) of the high-temperature coating reactor (1). A scraper conveyor (5) for conveying the dispersed uncooled material to the pre-carbonization equipment; the conveyor feed inlet (51) of the scraper conveyor (5) is connected to the discharge outlet of the dispersion bin (3), and the conveyor discharge outlet (52) of the scraper conveyor (5) is connected to the feed inlet of the pre-carbonization equipment.

2. The discharging, dispersing and conveying device for the high-temperature coated reaction kettle according to claim 1, wherein, The depolymerization and dispersion machine (4) includes: A rotating shaft (42) installed in the dispersion bin (3); A number of rotating blades (43) installed on the rotating shaft (42); A motor one (41) for driving the rotation of the rotating shaft (42).

3. The high-temperature coated reactor discharge dispersion and conveying device according to claim 2, characterized in that, A grid plate (32) is installed in the dispersion bin (3), and the grid plate (32) is located between the rotating shaft (42) and the discharge outlet of the dispersion bin (3); the grid plate (32) and the rotating blades (43) are arranged in an alternating nested manner, and a set spacing is reserved between the grid plate (32) and the rotating blades (43).

4. The high-temperature coated reactor discharge dispersion and conveying device according to claim 2, characterized in that, The dispersion bin (3) is provided with a first tail gas discharge port (31).

5. The discharging, dispersing and conveying device for the high-temperature coated reaction kettle according to claim 2, wherein The scraper conveyor (5) includes: A traction chain (55); A number of scrapers (56) installed on the traction chain (55) at a set spacing and a set angle; A sprocket (54) for driving the traction chain (55); A motor two (53) for driving the sprocket (54) and having a set spacing from the bottom plate of the scraper conveyor (5).

6. The discharging, dispersing and conveying device for a high-temperature coated reaction kettle according to claim 5, wherein Both the motor one (41) and the motor two (53) are variable-frequency motors.

7. The high-temperature coated reactor discharge dispersing and conveying device according to claim 5, wherein The scraper conveyor (5) further includes a nitrogen inlet (510) and a second tail gas discharge port (58).

8. The discharging, dispersing and conveying device for the high-temperature coated reaction kettle according to claim 5, characterized in that, The end of the scraper (56) is blade-shaped.

9. The discharging, dispersing and conveying device for the high-temperature coated reaction kettle according to claim 5, wherein The scraper conveyor (5) is provided with a dust-proof cover (57).

10. The discharging, dispersing and conveying device for the high-temperature coated reaction kettle according to claim 5, wherein, A trough (59) is arranged on the bottom plate of the scraper conveyor (5).

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