Graphitization production system and power transmission method thereof

Abstract

The invention provides a graphitization production system and a power transmission method thereof. The graphitization production system comprises a base, a first graphitization furnace, a second graphitization furnace, a first copper-aluminum bar, a second copper-aluminum bar and a third copper-aluminum bar, the plurality of first graphitization furnaces and the plurality of second graphitization furnaces are respectively arranged on the two sides of the X direction of the foundation; the first copper-aluminum bar, the second copper-aluminum bar and the third copper-aluminum bar are arranged on the two sides of the foundation in the Y direction respectively, and the multiple first graphitization furnaces and the multiple second graphitization furnaces are connected to the first copper-aluminum bar in parallel; the plurality of first graphitization furnaces are respectively connected in parallel to the second copper-aluminum bar through a first switch; the plurality of second graphitization furnaces are respectively connected in parallel to the third copper-aluminum bar through a second switch; the second copper-aluminum bar and the third copper-aluminum bar are connected through a third switch; the second copper aluminum bar is connected with a first transformer, and the third copper aluminum bar is connected with a second transformer. The capacity of the transformer can be fully utilized, and the equipment investment cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of graphitization production in the carbon industry, and particularly relates to a graphitization production system and a power transmission method thereof. Background Art

[0002] The battery of an electric vehicle, as an electric vehicle and a battery energy storage system, mainly includes a positive electrode material, a negative electrode material, a separator, and an electrolyte. With the rapid development of electric vehicles and battery energy storage, the current annual demand for negative electrode materials in the market is about 1.5 million tons, and the market scale is expanding rapidly.

[0003] Most of the negative electrode materials are produced by graphitization. In this production system, a single transformer is used to supply power to multiple graphitization furnaces. The power transmission at the early stage of graphitization power transmission is relatively small, while the power transmission at the later stage of graphitization power transmission is twice that of the early stage. If the transformer is selected according to the power transmission parameters at the later stage, it will cause problems such as a large surplus of equipment in the early stage, low utilization rate, and high equipment investment cost. However, if the transformer is selected according to the power transmission parameters at the early stage, the problem that the power transmission power cannot meet the usage requirements will occur at the later stage of graphitization power transmission, reducing the graphitization production efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a graphitization production system and a power transmission method thereof that can meet the power transmission requirements at the early and later stages of graphitization power transmission, and improve the production efficiency.

[0005] The technical solution of the present invention is: a graphitization production system, including a foundation, a first graphitization furnace and a second graphitization furnace arranged on the foundation, a first copper-aluminum row, a second copper-aluminum row, and a third copper-aluminum row extending along the X direction of the foundation; a plurality of the first graphitization furnaces are arranged on one side of the foundation in the X direction, and a plurality of the second graphitization furnaces are arranged on the other side of the foundation in the X direction; the first copper-aluminum row is arranged on one side of the foundation in the Y direction, and a plurality of the first graphitization furnaces and a plurality of the second graphitization furnaces are connected in parallel to the first copper-aluminum row; the second copper-aluminum row and the third copper-aluminum row are arranged on the other side of the foundation in the Y direction; a plurality of the first graphitization furnaces are connected in parallel to the second copper-aluminum row, and a first switch is arranged on the connection circuit between each first graphitization furnace and the second copper-aluminum row; a plurality of the second graphitization furnaces are connected in parallel to the third copper-aluminum row, and a second switch is arranged on the connection circuit between each second graphitization furnace and the third copper-aluminum row; the second copper-aluminum row and the third copper-aluminum row are connected by a third switch; a first transformer is connected to the second copper-aluminum row, and a second transformer is connected to the third copper-aluminum row.

[0006] Preferably, the graphitization production system further includes a track extending along the X direction and erected on the foundation through a support frame, at least one first cooling and heat extraction device slidably disposed on the track and traveling back and forth between multiple first graphitization furnaces, and at least one second cooling and heat extraction device slidably disposed on the track and traveling back and forth between multiple second graphitization furnaces.

[0007] Preferably, both the first cooling and heat extraction device and the second cooling and heat extraction device include a first moving frame, an outer frame, and an inner frame. The first moving frame is slidably connected to the track. A plurality of outer frames are arranged in the Y direction of the first moving frame. An inner frame that moves up and down in the Z direction is provided on each outer frame. A plurality of heat extraction pipes are provided on the lower surface of the inner frame.

[0008] Preferably, a plurality of heat extraction pipes are distributed in a rectangular array on the inner frame; a pointed tip is provided at the bottom of each heat extraction pipe.

[0009] Preferably, the support frame is in an n shape, and the open end of the n shape is connected to the foundation. A horizontal rib is provided inside the support frame, and the upper end of the support frame is formed with an installation cavity for installing a first copper-aluminum row, a second copper-aluminum row, and a third copper-aluminum row by the horizontal rib; the track is disposed on the upper surface of the support frame.

[0010] Preferably, the graphitization production system further includes a sky track extending along the X direction and erected on the foundation through a column, a first overhead crane slidably disposed on the sky track and traveling back and forth between multiple first graphitization furnaces, and a second overhead crane slidably disposed on the sky track and traveling back and forth between multiple second graphitization furnaces.

[0011] Preferably, both the first overhead crane and the second overhead crane include a second moving frame and a material suction device. The second moving frame is slidably connected to the sky track. The material suction device is slidably connected to the second moving frame in the Y direction. A material suction port is provided at the bottom of the material suction device.

[0012] Preferably, the material suction port has a degree of freedom of moving up and down in the Z direction.

[0013] The present invention also provides a method for power transmission using the above graphitization production system, including:

[0014] Disconnect the third switch; close the first switch corresponding to one of the first graphitization furnaces and the second switch corresponding to one of the second graphitization furnaces respectively; start the first transformer to supply power to the connected first graphitization furnace, and the power supply power is P / 2; start the second transformer to supply power to the connected second graphitization furnace, and the power supply power is P / 2;

[0015] Turn off the third switch; turn off either the first switch corresponding to one of the first graphitization furnaces or the second switch corresponding to one of the second graphitization furnaces; start the first transformer and the second transformer, and simultaneously supply power to the turned-off first graphitization furnace or the second graphitization furnace, with the power supply being P / 2 + P / 2 = P.

[0016] Compared with the related art, the beneficial effects of the present invention are as follows:

[0017] First, the present invention adopts a parallel connection of multiple first graphitization furnaces with the first transformer and a parallel connection of multiple second graphitization furnaces with the second transformer. During use, each switch is turned on or off according to the actual situation to connect the corresponding graphitization furnace, so as to meet the power supply requirements in different periods of graphitization, making the utilization rate of the graphitization transformer capacity reach more than 90%, and significantly accelerating the power supply speed;

[0018] Second, the present invention is provided with a cooling heat extractor, which significantly improves the cooling efficiency of the graphitization furnace, reduces the graphitization cooling cycle from the original 35 days to about 10 days, and improves the graphitization production efficiency;

[0019] Third, the present invention designs multiple first graphitization furnaces, multiple second graphitization furnaces, and the first overhead crane, the second overhead crane, the first cooling heat extractor, and the second cooling heat extractor supporting them, which operate independently on both sides without interference, reducing the risk of cross-operation. Description of the Drawings

[0020] Figure 1 It is a three-dimensional structure schematic diagram of the graphitization production system provided by the present invention;

[0021] Figure 2 It is a plan schematic diagram of the graphitization production system provided by the present invention;

[0022] Figure 3 It is a side view schematic diagram of the graphitization production system provided by the present invention;

[0023] Figure 4 For Figure 3 A - A sectional view and rotation schematic diagram along;

[0024] Figure 5 It is a power supply logic diagram of the graphitization production system provided by the present invention;

[0025] Figure 6 It is a power supply curve diagram of the graphitization production system provided by the present invention.

[0026] In the accompanying drawings: 1. Foundation; 2. Column; 3. Overhead rail; 4. First cooling heat exchanger; 5. First overhead crane; 6. First graphitization furnace; 7. Third overhead crane; 8. Second graphitization furnace; 9. Second cooling heat exchanger; 10. Second overhead crane; 11. First copper-aluminum busbar; 12. Second transformer; 13. Third copper-aluminum busbar; 14. Third switch; 15. Second copper-aluminum busbar; 16. Rail; 17. Support frame; 18. First transformer; 19. Suction device; 20. Second moving frame; 21. Outer frame; 22. Inner frame; 23. First moving frame; 24. First switch; 25. Second switch; 26. Heat extraction pipe; 27. Horizontal rib. Detailed implementation manners

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. For the convenience of description, words such as "upper", "lower", "left", and "right" hereinafter only indicate the same directions as the upper, lower, left, and right directions of the accompanying drawings themselves, and do not limit the structure.

[0028] As Figure 1 , Figure 2 shown, a graphitization production system provided in this embodiment includes a foundation 1, a column 2, an overhead rail 3, a first cooling heat exchanger 4, a first overhead crane 5, a first graphitization furnace 6, a third overhead crane 7, a second graphitization furnace 8, a second cooling heat exchanger 9, a second overhead crane 10, a first copper-aluminum busbar 11, a second transformer 12, a third copper-aluminum busbar 13, a third switch 14, a second copper-aluminum busbar 15, a rail 16, a support frame 17, a first transformer 18, a suction device 19, a first switch 24, and a second switch 25.

[0029] The foundation 1 is the foundation of a factory building, and it has a length direction X, a width direction Y, and a height direction Z. Two groups of columns 2 are arranged along the Y direction on the foundation 1, and multiple columns are arranged along the X direction in each group. The multiple columns 2 in each group are connected by an overhead rail 3. A first overhead crane 5, a second overhead crane 10, and a third overhead crane 7 are slidably arranged between the two overhead rails 3 in the Y direction.

[0030] A plurality of first graphitization furnaces 6 and a plurality of second graphitization furnaces 8 are arranged in the X direction of the foundation 1. A plurality of the first graphitization furnaces 6 are arranged on one side of the X direction of the foundation 1, and a plurality of the second graphitization furnaces 8 are arranged on the other side of the X direction of the foundation 1.

[0031] The first copper-aluminum row 11, the second copper-aluminum row 15, and the third copper-aluminum row 13 extend along the X direction of the foundation 1. The first copper-aluminum row 11 is arranged on one side of the foundation 1 in the Y direction, and a plurality of first graphitization furnaces 6 and a plurality of second graphitization furnaces 8 are connected in parallel to the first copper-aluminum row 11. The second copper-aluminum row 15 and the third copper-aluminum row 13 are arranged on the other side of the foundation 1 in the Y direction. As Figure 1 , Figure 5 shown, a plurality of first graphitization furnaces 6 are connected in parallel to the second copper-aluminum row 15, and a first switch 24 is arranged on the connection circuit between each first graphitization furnace 6 and the second copper-aluminum row 15. A plurality of second graphitization furnaces 8 are connected in parallel to the third copper-aluminum row 13, and a second switch 25 is arranged on the connection circuit between each second graphitization furnace 8 and the third copper-aluminum row 13. The second copper-aluminum row 15 and the third copper-aluminum row 13 are connected by a third switch 14. A first transformer 18 is connected to the second copper-aluminum row 15, and a second transformer 12 is connected to the third copper-aluminum row 13.

[0032] As Figure 1 , Figure 3 shown, the track 16 is erected on the foundation 1 by a support frame 17 and extends along the X direction. There are two first cooling heat extractors 4, which are slidably arranged on the track 16 and move back and forth between a plurality of first graphitization furnaces 6. There are two second cooling heat extractors 9, which are slidably arranged on the track 16 and move back and forth between a plurality of second graphitization furnaces 8.

[0033] The support frame 17 is in an n shape and can stably support the track 16 and the copper-aluminum rows at the same time. The open end of the n-shaped support frame 17 is connected to the foundation 1. A horizontal rib 27 is arranged inside the support frame 17, and the horizontal rib 27 forms an installation cavity at the upper end of the support frame 17 for installing the first copper-aluminum row 11, the second copper-aluminum row 15, and the third copper-aluminum row 13. The track 16 is arranged on the upper surface of the support frame 17.

[0034] As Figure 4 shown, both the first cooling heat extractor 4 and the second cooling heat extractor 9 include a first moving frame 23, an outer frame 21, and an inner frame 22. The first moving frame 23 is slidably connected to the track 16. A plurality of outer frames 21 are arranged in the Y direction of the first moving frame 23, and the inner frame 22 that moves up and down along the Z direction is arranged on each outer frame 21. A plurality of heat extraction pipes 26 are arranged on the lower surface of the inner frame 22. The plurality of heat extraction pipes 26 are arranged in a rectangular array on the inner frame 22; the bottom of each heat extraction pipe 26 is provided with a pointed head, which can quickly insert into the materials of the graphitization furnace for heat extraction, accelerating the heat dissipation of the graphitization furnace and improving the cooling efficiency.

[0035] As Figure 1As shown, the first overhead crane 5 is slidably arranged on the overhead rail 3 and shuttles between multiple first graphitization furnaces 6. The second overhead crane 10 is slidably arranged on the overhead rail 3 and shuttles between multiple second graphitization furnaces 8. The third overhead crane 7 is used to unload the product materials in the graphitization furnace.

[0036] As Figure 3 shown, the first overhead crane 5, the third overhead crane 7 and the second overhead crane 10 all include a second moving frame 20 and a material suction device 19. The second moving frame 20 is slidably connected to the overhead rail 3. The material suction device 19 is slidably connected to the second moving frame 20 along the Y direction. A material suction port is provided at the bottom of the material suction device 19. The material suction port has a degree of freedom of lifting in the Z direction.

[0037] As Figure 5 、 Figure 6 shown, the present invention also provides a method for power transmission using the above-mentioned graphitization production system, including:

[0038] In the early stage of graphitization power transmission:

[0039] Disconnect the third switch 14; respectively close the first switch 24 corresponding to one of the first graphitization furnaces 6 and the second switch 25 corresponding to one of the second graphitization furnaces 8; start the first transformer 18 to supply power to the connected first graphitization furnace 6, and the power transmission power is P / 2; start the second transformer 12 to supply power to the connected second graphitization furnace 8, and the power transmission power is P / 2;

[0040] In the later stage of graphitization power transmission:

[0041] Close the third switch 14; respectively close the first switch 24 corresponding to one of the first graphitization furnaces 6 or the second switch 25 corresponding to one of the second graphitization furnaces 8; start the first transformer 18 and the second transformer 12, and simultaneously supply power to the closed first graphitization furnace 6 or the second graphitization furnace 8, and the power transmission power is P / 2 + P / 2 = P.

[0042] The present invention can make full use of the capacity of the transformer, reduce the equipment investment cost; shorten the graphitization cooling cycle and improve the graphitization output.

[0043] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A graphitization production system, comprising a foundation (1), a first graphitization furnace (6) and a second graphitization furnace (8) provided on the foundation (1), characterized in that, It further includes a first copper-aluminum row (11), a second copper-aluminum row (15), and a third copper-aluminum row (13) extending along the X direction of the foundation (1); a plurality of the first graphitization furnaces (6) are arranged on one side of the foundation (1) in the X direction, and a plurality of the second graphitization furnaces (8) are arranged on the other side of the foundation (1) in the X direction; the first copper-aluminum row (11) is arranged on one side of the foundation (1) in the Y direction, and a plurality of the first graphitization furnaces (6) and a plurality of the second graphitization furnaces (8) are connected in parallel to the first copper-aluminum row (11); the second copper-aluminum row (15) and the third copper-aluminum row (13) are arranged on the other side of the foundation (1) in the Y direction; a plurality of the first graphitization furnaces (6) are connected in parallel to the second copper-aluminum row (15), and a first switch (24) is arranged on the connection circuit between each first graphitization furnace (6) and the second copper-aluminum row (15); a plurality of the second graphitization furnaces (8) are connected in parallel to the third copper-aluminum row (13), and a second switch (25) is arranged on the connection circuit between each second graphitization furnace (8) and the third copper-aluminum row (13); the second copper-aluminum row (15) and the third copper-aluminum row (13) are connected by a third switch (14); a first transformer (18) is connected to the second copper-aluminum row (15), and a second transformer (12) is connected to the third copper-aluminum row (13).

2. The graphitization production system according to claim 1, wherein, It further includes a track (16) erected on the foundation (1) by a support frame (17) and extending along the X direction, at least one first cooling heat extractor (4) slidably arranged on the track (16) and traveling back and forth among a plurality of the first graphitization furnaces (6), and at least one second cooling heat extractor (9) slidably arranged on the track (16) and traveling back and forth among a plurality of the second graphitization furnaces (8).

3. The graphitization production system according to claim 2, characterized in that, Both the first cooling heat extractor (4) and the second cooling heat extractor (9) include a first moving frame (23), an outer frame (21), and an inner frame (22). The first moving frame (23) is slidably connected to the track (16). A plurality of the outer frames (21) are arranged in the Y direction of the first moving frame (23), and the inner frame (22) that lifts and lowers along the Z direction is arranged on each of the outer frames (21). A plurality of heat extraction pipes (26) are arranged on the lower surface of the inner frame (22).

4. The graphitization production system according to claim 3, wherein A plurality of the heat extraction pipes (26) are distributed in a rectangular array on the inner frame (22); a pointed head is provided at the bottom of each of the heat extraction pipes (26).

5. The graphitization production system according to claim 2, characterized in that, The support frame (17) is in an n shape, and the open end of its n shape is connected to the foundation (1). A horizontal rib (27) is arranged inside the support frame (17), and the horizontal rib (27) forms an installation cavity at the upper end of the support frame (17) for installing the first copper-aluminum row (11), the second copper-aluminum row (15), and the third copper-aluminum row (13); the track (16) is arranged on the upper surface of the support frame (17).

6. The graphitization production system according to claim 1, characterized in that, It further includes a sky rail (3) erected on the foundation (1) through a column (2) and extending in the X direction, a first overhead crane (5) slidably arranged on the sky rail (3) and shuttling between a plurality of first graphitization furnaces (6), and a second overhead crane (10) slidably arranged on the sky rail (3) and shuttling between a plurality of second graphitization furnaces (8).

7. The graphitization production system according to claim 6, characterized in that, Both the first overhead crane (5) and the second overhead crane (10) include a second moving frame (20) and a material suction device (19). The second moving frame (20) is slidably connected to the sky rail (3), and the material suction device (19) is slidably connected to the second moving frame (20) in the Y direction. A material suction port is provided at the bottom of the material suction device (19).

8. The graphitization production system according to claim 7, characterized in that, The material suction port has a degree of freedom of lifting in the Z direction.

9. A method for power transmission using the graphitization production system according to any one of claims 1-8, characterized in that, It includes: Disconnect the third switch (14); close the first switch (24) corresponding to one of the first graphitization furnaces (6) and the second switch (25) corresponding to one of the second graphitization furnaces (8) respectively; start the first transformer (18) to supply power to the connected first graphitization furnace (6) with a power supply of P / 2; start the second transformer (12) to supply power to the connected second graphitization furnace (8) with a power supply of P / 2. Close the third switch (14); close either the first switch (24) corresponding to one of the first graphitization furnaces (6) or the second switch (25) corresponding to one of the second graphitization furnaces (8); start the first transformer (18) and the second transformer (12) to supply power to the closed first graphitization furnace (6) or the second graphitization furnace (8) simultaneously with a power supply of P / 2 + P / 2 = P.

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