Pre-carbonization rotary granulation production line capable of rapidly cooling

Abstract

The invention relates to the technical field of lithium battery material production equipment, in particular to a quick-cooling pre-carbonization rotary granulation production line which comprises a feeding device, a rotary heating reaction device, a rotary cooling device and a switching device. The switching devices are respectively connected between the feeding device and the rotary heating reaction device and between the rotary heating reaction device and the rotary cooling device, and the rotary heating reaction device comprises a heating furnace body, a rotary drum, a heating device and a driving mechanism; a heating inner cavity is formed between the heating furnace body and the rotary roller, the air cooling mechanism is composed of a plurality of air guide pipelines, and one ends of the air guide pipelines penetrate through the heating furnace body and extend into the heating inner cavity, so that the air guide pipelines can conduct air blowing and heat exchange on a heating area in the heating furnace body, and cooling of the heating furnace body and the rotary roller is accelerated. The cooling time of the rotary heating reaction device is greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery material production equipment, in particular to a pre-carbonization rotary granulation production line capable of rapid cooling. BACKGROUND

[0002] A lithium battery is a battery that uses a non-aqueous electrolytic solution and has a lithium metal or lithium alloy as a negative electrode material. Due to the chemical instability of lithium metal, a lithium battery is prone to combustion or explosion in a high-temperature environment during production and processing. Therefore, a rotary furnace for processing lithium batteries needs to meet very high requirements, that is, it needs to be capable of uniform stirring and slow movement. In addition, high-nickel materials for lithium batteries are prone to sticking to the furnace wall, resulting in low production capacity. Therefore, the current production method requires manual feeding, rotation, and discharging, and has a low degree of automation. Moreover, the existing technology uses an intermittent production method. For example, to heat 2 tons of material to 500 to 1000 degrees Celsius, a rotary furnace needs to heat the material at one time, and the heating time is about 6 to 8 hours.

[0003] When different materials are replaced, the rotary furnace needs to be stopped for cleaning and maintenance. During this process, the existing technology needs to naturally cool the rotary heating reaction device, which takes 3 to 4 hours, seriously affecting the work efficiency of the production line. Therefore, in view of the above situation, there is an urgent need to develop a pre-carbonization rotary granulation production line capable of rapid cooling to meet the needs of actual use. SUMMARY

[0004] The present application aims to provide a pre-carbonization rotary granulation production line capable of rapid cooling, which solves the problem that the position of the installed hole has a deviation, and the tuning fork liquid level switch cannot be adjusted in height at the installation position, resulting in a large error in the liquid level height measured by the tuning fork liquid level switch.

[0005] To solve the above technical problems, the present application adopts the following technical solutions: ​The application discloses a pre-carbonization rotary granulation production line capable of rapid cooling, which comprises a feeding device, a rotary heating reaction device, a rotary cooling device and a switching device, wherein the feeding device, the rotary heating reaction device and the rotary cooling device are sequentially arranged, the switching device is connected between the feeding device and the rotary heating reaction device and between the rotary heating reaction device and the rotary cooling device, the rotary heating reaction device comprises a heating furnace body, a rotary drum, a heating device and a driving mechanism, the rotary drum is arranged in the heating furnace body and rotates along the central axis of the rotary drum, a heating inner cavity is arranged between the heating furnace body and the rotary drum, and a wind cooling mechanism is further arranged in the heating furnace body, wherein the wind cooling mechanism is composed of a plurality of air guide pipes, and one end of each air guide pipe penetrates through the heating furnace body and extends into the heating inner cavity.

[0006] In the above description, as a further scheme, a plurality of separation rings are arranged in the heating furnace body, the separation rings are arranged on the rotary drum and support the rotary drum, the separation rings divide the heating inner cavity into a plurality of heating zones, and the plurality of air guide pipes are arranged in the corresponding heating zones.

[0007] In the above description, as a further scheme, the heating device comprises a plurality of gas supply pipes and an ignition device, and the gas supply pipes and the ignition device extend into the heating inner cavity.

[0008] In the above description, as a further scheme, one end of each air guide pipe extending into the heating inner cavity is in a "7" shape, and the end of each air guide pipe is provided with a reversible cover plate.

[0009] In the above description, as a further scheme, the top of the cover plate is provided with a rotating joint, the cover plate is movably connected to the port of the air guide pipe through the rotating joint, the inner side of the cover plate is a slope that protrudes to the side of the air guide pipe, the slope is a hollow structure, the inclined surface of the slope and the side wall are provided with through holes, and when the cover plate covers the port of the air guide pipe, the through holes in the side wall of the slope are embedded in the air guide pipe.

[0010] In the above description, as a further scheme, the number of rotary heating reaction devices is at least two, and the two rotary heating reaction devices are connected through the switching device.

[0011] In the above description, as a further scheme, the rotary drum comprises a drum body and blades arranged on the inner wall of the drum body, the blades are uniformly distributed around the central axis of the drum body and form blade groups, and a plurality of blade groups are continuously arranged along the central axis of the drum body.

[0012] In the above description, as a further scheme, the blades of a subsequent blade group are arranged in a staggered mode relative to the blades of a previous blade group, and the staggered directions are in a clockwise direction or an anticlockwise direction.

[0013] As a further scheme in the above description, the vane is in a flat square structure, and the included angle between the plane where the vane side surface is located and the plane where the radial section of the cylinder is located is an acute angle; the central axis of the vane along the width extension direction is perpendicular to the central axis of the cylinder.

[0014] Compared with the prior art, the beneficial effects of the present application are that the air cooling mechanism composed of a plurality of strip air guide pipes is arranged in the interior of the heating furnace body, and one end of the air guide pipe penetrates through the heating furnace body and extends into the corresponding heating zone; when shutdown, the air guide pipe can be connected and conducted with the external fan, so that the air guide pipe can blow air and exchange heat to the heating zone in the heating furnace body, accelerate the cooling and temperature reduction of the heating furnace body and the rotary drum, and greatly reduce the cooling time of the rotary heating reaction device. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective structural schematic view of the pre-carbonization rotary granulation production line capable of fast cooling according to the embodiment; Figure 2 It is a sectional view structural schematic view of the pre-carbonization rotary granulation production line capable of fast cooling according to the embodiment; Figure 3 It is a sectional view structural schematic view of the pre-carbonization rotary granulation production line capable of fast cooling according to the embodiment; Figure 2 It is a partial enlarged structural schematic view of A in the embodiment; Figure 4 It is a sectional view structural schematic view of the air guide pipe in the closed state according to the embodiment; Figure 5 It is a sectional view structural schematic view of the air guide pipe in the air guide state according to the embodiment; In the figure: 1 - feeding device, 2 - rotary heating reaction device, 21 - heating furnace body, 22 - rotary drum, 23 - heating device, 231 - gas supply pipeline, 232 - ignition device, 24 - driving mechanism, 3 - rotary cooling device, 4 - switching device, 5 - air cooling mechanism, 51 - air guide pipe, 6 - heating zone, 7 - cover plate, 71 - rotating joint, 72 - inclined table, 73 - conducting hole, 8 - vane. DETAILED DESCRIPTION

[0016] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0017] In the embodiment, please refer to Figures 1-5A rapid cooling pre-carbonization rotary granulation production line, which is a specific implementation of the pre-carbonization rotary granulation production line, comprises a feeding device 1, a rotary heating reaction device 2, a rotary cooling device 3, and a switching device 4. The feeding device 1, the rotary heating reaction device 2, and the rotary cooling device 3 are sequentially arranged. The switching device 4 is connected between the feeding device 1 and the rotary heating reaction device 2 and between the rotary heating reaction device 2 and the rotary cooling device 3. The rotary heating reaction device 2 comprises a heating furnace body 21, a rotary drum 22, a heating device 23, and a driving mechanism 24. The rotary drum 22 is rotatably arranged in the heating furnace body 21 along the central axis thereof by the driving mechanism 24. A heating inner cavity is arranged between the heating furnace body 21 and the rotary drum 22. A forced air cooling mechanism 5 is further arranged in the heating furnace body 21. The forced air cooling mechanism 5 is composed of a plurality of air guide pipes 51. One end of the air guide pipe 51 penetrates the heating furnace body 21 and extends into the heating inner cavity.

[0018] The number of the rotary heating reaction devices 2 is at least two. The two rotary heating reaction devices 2 are connected by the switching device 4. The material is heated in two rotary heating reaction devices 2 to form a low-temperature reaction section and a high-temperature reaction section, so that the material can be gradually heated to a high temperature, and the material can be fully heated to improve the production quality.

[0019] The forced air cooling mechanism 5 composed of a plurality of air guide pipes 51 is arranged in the heating furnace body 21. One end of the air guide pipe 51 penetrates the heating furnace body 21 and extends into the corresponding heating zone 6. When the machine is stopped, the external fan is connected to the air guide pipe 51 to conduct air to the heating zone 6 in the heating furnace body 21, so as to accelerate the cooling of the heating furnace body 21 and the rotary drum 22, and greatly reduce the cooling time of the rotary heating reaction device 2.

[0020] Specifically, as shown in Figure 3 The inside of the heating furnace body 21 is provided with a plurality of partition rings. The partition rings are sleeved on the rotary drum 22 and support the rotary drum 22. The partition rings divide the heating inner cavity into a plurality of heating zones 6. A plurality of air guide pipes 51 are arranged in the corresponding heating zones 6. The heating device 23 comprises a plurality of gas supply pipes 231 and an ignition device 232. The gas supply pipes 231 and the ignition device 232 extend into the heating inner cavity.

[0021] By dividing the heating furnace body 21 into at least two heating zones 6 and insulating each adjacent heating zone 6 from each other, the rotary drum 22 passes through each of the heating zones 6, and thus the heating device 23 in each heating zone 6 can heat the rotary drum 22 in each heating zone 6 at different heating temperatures. Thus, the heating device 23 can gradually heat the material along the conveying direction of the material during the rotation of the rotary drum 22. Since the material is stirred and tumbled during the conveying, the material is not only stirred very uniformly, but also heated quickly, and the heating time is short, and thus the feeding, heating and reaction can be continuously carried out.

[0022] In a further aspect, as shown in Figures 4-5 The air guide pipe 51 extends to the heating inner cavity in a "7" shape, and the end of the air guide pipe 51 is provided with a reversible cover plate 7. The top of the cover plate 7 is provided with a rotating joint 71, and the cover plate 7 is movably connected to the port of the air guide pipe 51 through the rotating joint 71. The inner side of the cover plate 7 is a inclined table 72 protruding to one side of the air guide pipe 51. The inclined table 72 is a hollow structure, and the inclined surface of the inclined table 72 and the side wall are provided with through holes 73. When the cover plate 7 covers the port of the air guide pipe 51, the through holes 73 of the side wall of the inclined table 72 are embedded in the air guide pipe 51.

[0023] When the air guide pipe 51 is started, the cooling air pressure can push the inclined table 72 of the cover plate 7 to make the cover plate 7 turn outward around the rotating joint 71, and at the same time, the through holes 73 of the side wall of the inclined table 72 can be exposed to the port of the air guide pipe 51. The cooling air pressure can enter the inclined table 72 through the inclined surface of the inclined table 72, and then pass through the through holes 73 of the side wall of the inclined table 72 to blow air to one side of the heating inner cavity. When the rotary heating reaction device 2 is normally working, the external fan stops blowing, and the cover plate 7 at the port of the air guide pipe 51 is turned to one side of the air guide pipe 51 under the action of its own gravity. The cover plate 7 covers the port of the air guide pipe 51, and the through holes 73 of the side wall of the inclined table 72 are embedded in the air guide pipe 51, so that the air guide pipe 51 and the heating inner cavity form an isolated structure, effectively preventing gas from entering the air guide pipe 51.

[0024] Specifically, as shown in Figure 3As shown, the rotary drum 22 comprises a drum body and blades 8 arranged on the inner wall of the drum body, the blades 8 are uniformly distributed around the central axis of the drum body and form blade 8 groups, a plurality of the blade 8 groups are continuously arranged along the extending direction of the central axis of the drum body, the blades 8 of the latter blade 8 group are arranged in a staggered manner relative to the blades 8 of the former blade 8 group, and the staggered directions are all along the clockwise direction or the counterclockwise direction, the blade 8 has a flat square structure, and the included angle between the plane where the side surface of the blade 8 is located and the plane where the radial section of the drum body is located is an acute angle; the central axis of the blade 8 along the extending direction of the width is perpendicular to the central axis of the drum body.

[0025] The material is moved forward. Meanwhile, the blades 8 of each blade 8 group form a spiral structure along the central axis direction of the drum body, so that the material can be continuously pushed, and the purpose of continuous feeding is achieved. In addition, by arranging the blades 8 in this way, the material can be uniformly stirred and slowly transported when the rotary drum 22 rotates forward, meeting the requirements of process production, and the rotary drum 22 can be reversely rotated at a specific time to quickly clean out the residual material, improving the convenience of maintenance.

[0026] The blades 8 of the latter blade 8 group are arranged in a staggered manner relative to the blades 8 of the former blade 8 group, and the staggered directions are all along the clockwise direction or the counterclockwise direction. In this way, the blades 8 can be slowly sent forward, and the material stirring is more uniform, thereby improving the quality of material production.

[0027] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, some simple deductions or replacements can be made without departing from the concept of the present application, and all of them should be regarded as the protection scope of the present application.

Claims

1. A pre-carbonization rotary granulation production line with rapid cooling capability, comprising a feeding device, a rotary heating and reaction device, a rotary cooling device, and a transfer device, wherein the feeding device, the rotary heating and reaction device, and the rotary cooling device are arranged sequentially, and the transfer device is respectively connected between the feeding device and the rotary heating and reaction device and between the rotary heating and reaction device and the rotary cooling device, characterized in that: The rotary heating reaction device includes a heating furnace body, a rotary drum, a heating device, and a driving mechanism. The rotary drum is rotatably mounted in the heating furnace body along its own central axis via the driving mechanism. A heating inner cavity is provided between the heating furnace body and the rotary drum. The heating furnace body is also equipped with an air-cooling mechanism, which consists of several air guide pipes. One end of each air guide pipe passes through the heating furnace body and extends into the heating inner cavity.

2. The rapidly cooling pre-carbonization rotary granulation production line according to claim 1, characterized in that: The interior of the heating furnace body is provided with several partition rings. The partition rings are fitted around the rotating drum and support the rotating drum. The partition rings divide the heating cavity into several heating zones, and several air guide pipes are set in the corresponding heating zones.

3. The rapidly cooling pre-carbonization rotary granulation production line according to claim 1, characterized in that: The heating device consists of several gas supply pipes and an ignition device, which extend into the heating cavity.

4. The rapidly cooling pre-carbonization rotary granulation production line according to claim 3, characterized in that: The end of the air duct extending into the heating cavity has a "7" shaped structure, and the end of the air duct is equipped with a flip-up cover.

5. The rapidly cooling pre-carbonization rotary granulation production line according to claim 4, characterized in that: The top of the cover plate is provided with a rotating joint. The cover plate is movably connected to the port of the air duct through the rotating joint. The inner side of the cover plate is a sloping platform protruding to one side of the air duct. The sloping platform is a hollow structure. The inclined surface and side wall of the sloping platform are provided with through holes. When the cover plate is placed on the port of the air duct, the through holes on the side wall of the sloping platform are embedded in the air duct.

6. The rapidly cooling pre-carbonization rotary granulation production line according to claim 1, characterized in that: The number of rotary heating reaction devices is at least two, and the two rotary heating reaction devices are connected by the adapter.

7. The rapidly cooling pre-carbonization rotary granulation production line according to claim 1, characterized in that: The rotary drum includes a cylinder and blades disposed on the inner wall of the cylinder. The blades are evenly distributed circumferentially around the central axis of the cylinder to form blade groups, and multiple blade groups are continuously arranged along the extension direction of the central axis of the cylinder.

8. A pre-carbonization rotary granulation production line with rapid cooling according to claim 7, characterized in that: The blades of the latter blade group are offset relative to the blades of the former blade group, and the offset direction is either clockwise or counterclockwise.

9. A pre-carbonization rotary granulation production line with rapid cooling according to claim 7, characterized in that: The blade has a flat, square structure, and the angle between the plane containing the side of the blade and the plane containing the radial section of the cylinder is an acute angle; the central axis of the blade along its width extension direction intersects the central axis of the cylinder perpendicularly.

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