A rotary kiln for processing battery raw materials

Abstract

The present invention discloses a rotary kiln for processing battery raw materials, comprising a kiln head bin, a heating mechanism, a rotary kiln body, a kiln tail bin, a tug mechanism, and a driving mechanism; support boxes are provided at both ends of the rotary kiln body, and the support boxes are located between the rotary kiln body and the kiln head bin and between the rotary kiln body and the kiln tail bin; a stirring mechanism is provided in the inner cavity of the rotary kiln body, and the stirring mechanism includes at least two sets of stirring blades and a rotating shaft; an air pump, an air guide seat, and a motor are provided inside the support box located at one end of the kiln tail bin. The present invention arranges a stirring mechanism in the interior of the rotary kiln body in a direction opposite to that of the rotary kiln body, and uses an air pump to draw high-temperature gas in the rotary kiln body into the stirring mechanism, so that the high-temperature gas can be injected back into the inner cavity of the rotary kiln body through the rotating blades. The high-temperature gas impacts the battery raw materials in the rotary kiln body, fully breaking up the battery raw materials, preventing the battery raw materials from sticking together, and thus ensuring the drying rate of the battery raw materials.

Description

Technical Field

[0001] The present invention relates to the technical field of battery raw material processing, in particular to a rotary kiln for processing battery raw materials. Background Art

[0002] During the lithium battery manufacturing process, the raw materials generally need to be dried. Existing equipment for drying raw materials in rotary kilns is often used. Traditional rotary kilns typically have smooth, curved surfaces within their cylinders, and some are equipped with scooping plates. These plates scoop the raw materials and spread them around during drying, keeping them in a relatively dynamic state during drying and reducing the accumulation of raw materials on the cylinder walls. However, even with scooping plates, existing rotary kilns still fail to fully disperse the raw materials. This insufficiently dispersed raw materials not only causes them to stick together, but also reduces the drying rate, preventing rapid drying of the raw materials. Summary of the Invention

[0003] The object of the present invention is to provide a rotary kiln for processing battery raw materials to solve the problems mentioned in the above background technology.

[0004] In order to achieve the above-mentioned purpose, the solution of the present invention is: a rotary kiln for processing battery raw materials, comprising a kiln head bin, a heating mechanism, a rotary kiln body, a kiln tail bin, a tug mechanism and a driving mechanism; the kiln head bin and the kiln tail bin are respectively arranged at both ends of the rotary kiln body and are communicated with the inner cavity of the rotary kiln body; the heating mechanism is located at one end of the kiln head bin, and the output end of the heating mechanism is communicated with the inner cavity of the rotary kiln body; the tug mechanism and the driving mechanism are both arranged below the rotary kiln body and connected to the rotary kiln body for driving the rotary kiln body to rotate; support boxes are provided at both ends of the rotary kiln body, and the support boxes are located between the rotary kiln body and the kiln head bin and between the rotary kiln body and the kiln tail bin; a stirring mechanism is provided in the inner cavity of the rotary kiln body, and the stirring mechanism can rotate and stir the battery raw materials in the inner cavity of the rotary kiln body; the stirring mechanism comprises at least two groups of stirring blades and a rotating shaft; the two ends of the rotating shaft extend to the inner cavities of the two supporting boxes respectively; each group of The stirring blades are all arranged at equal intervals in an inclined shape on the outside of the rotating shaft, and the number of blades in each group of stirring blades is not less than 2; the blades and the rotating shaft are both hollow structures, and an isolation net is provided at the end of the blade away from the rotating shaft, and the hollow cavity of the blade is connected to the hollow cavity of the rotating shaft; an air pump, an air guide seat and a motor are provided inside the supporting box located at one end of the kiln tail bin; the air guide seat is connected to the side of the supporting box in the center close to the rotary kiln body, and the end of the rotating shaft close to the kiln tail bin is located in the inner cavity of the air guide seat, and at least two air grooves are provided on the rotating shaft in the air guide seat; the air pump is fixed in the supporting box above the air guide seat, and the air inlet pipe of the air pump extends to the inner cavity of the rotary kiln body, and the air outlet pipe of the air pump is connected to the inner cavity of the air guide seat; the motor is fixed in the supporting box at one end of the air guide seat close to the kiln tail bin, and the output shaft of the motor extends into the inner cavity of the air guide seat and is connected to one end of the rotating shaft, so that when the motor rotates, it can drive the rotating shaft and the blades to rotate in the inner cavity of the rotary kiln body.

[0005] Furthermore, a feeding pipe for communicating with the inner cavity of the rotary kiln body is provided at the bottom of the kiln head bin; a heat conducting pipe for communicating with the inner cavity of the rotary kiln body is provided at one end of the heating mechanism; a material guiding pipe for communicating with the inner cavity of the rotary kiln body is provided at one end of the kiln tail bin; the feeding pipe, heat conducting pipe and material guiding pipe all pass through a supporting box connected to the kiln head bin and extend into the inner cavity of the rotary kiln body.

[0006] Furthermore, a dust-proof filter membrane is provided at the end of the air inlet pipe of the air pump.

[0007] Furthermore, the rotation direction of the rotary kiln body is opposite to the rotation direction of the stirring mechanism.

[0008] Furthermore, both ends of the rotary kiln body are provided with connecting rings for connecting the supporting boxes, so that the rotary kiln body can rotate between the two supporting boxes under the action of the tug mechanism and the driving mechanism.

[0009] Furthermore, a heat conducting member is provided in the inner cavity of the rotary kiln body, and the heat conducting member is spirally arranged on the inner cavity side wall of the rotary kiln body, and a spiral material guiding trough is formed between the heat conducting member and the inner wall of the rotary kiln body.

[0010] Furthermore, the spiral arrangement direction of the heat conducting member and the material guiding trough is the same as the rotation direction of the rotary kiln body.

[0011] Furthermore, the blades are in a flat plate or arc shape.

[0012] Furthermore, the number of the tug mechanisms is no less than 2; and the driving mechanism is located between the tug mechanisms.

[0013] Furthermore, a limiting ring and a gear ring connected to the tug mechanism and the driving mechanism are provided on the outer side of the rotary kiln body.

[0014] The beneficial effects of the present invention compared with the prior art are:

[0015] (1) The present invention sets a stirring mechanism in the opposite direction of the rotary kiln body inside the rotary kiln body, and uses an air pump to pump the high-temperature gas in the rotary kiln body into the stirring mechanism, so that the high-temperature gas can be injected back into the inner cavity of the rotary kiln body through the rotating blades. The scattered high-temperature gas impacts the battery raw materials in the rotary kiln body, fully breaks up the battery raw materials, avoids the battery raw materials from sticking together, thereby ensuring that the battery raw materials are fully in contact with the inner wall of the rotary kiln body, and improving the drying rate of the battery raw materials;

[0016] (2) The present invention provides a spiral heat-conducting member and a material guide trough on the inner wall of the rotary kiln body, and provides a spiral material trough on the heat-conducting member, so that the battery raw materials can always be in contact with the heat-conducting member when moving along the material guide trough from one end of the kiln head bin to one end of the kiln tail bin, and effectively dry the battery raw materials through the heat-conducting member and the inner wall of the rotary kiln body. At the same time, when the heat-conducting member and the material guide trough are used in conjunction with the stirring mechanism, the gas blown out from the rotating blades will impact the battery raw materials in the material guide trough, further increasing the gas impact force and causing the battery raw materials to be continuously lifted up and dropped under the influence of the heat-conducting member and the material guide trough, which can not only further improve the uniformity of the drying of the battery raw materials, but also accelerate the drying of the battery raw materials, thereby improving the drying rate of the battery raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view structural schematic diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the front cross-section structure of the supporting box after being connected to the rotary kiln body of the present invention;

[0019] Figure 3 It is a schematic diagram of the side cross-section structure of the rotary kiln body of the present invention;

[0020] Figure 4 For the present invention Figure 2 Enlarged structural diagram at point A in the middle.

[0021] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0022] Kiln head bin 1, feeding pipe 11, heating mechanism 2, heat conduction pipe 21, supporting box 3, limit groove 31, air pump 32, air guide seat 33, motor 34, rotary kiln body 4, connecting ring 41, heat conduction part 42, material guide trough 43, kiln tail bin 5, material guide pipe 51, tugboat mechanism 6, driving mechanism 7, stirring mechanism 8, blades 81, isolation net 811, rotating shaft 82, air groove 821. DETAILED DESCRIPTION

[0023] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0024] Example 1:

[0025] like Figure 1-4As shown, a rotary kiln for processing battery raw materials includes a kiln head bin 1, a heating mechanism 2, a rotary kiln body 4, a kiln tail bin 5, a tug mechanism 6 and a driving mechanism 7; the kiln head bin 1 and the kiln tail bin 5 are respectively arranged at both ends of the rotary kiln body 4 and are connected to the inner cavity of the rotary kiln body 4; the heating mechanism 2 is located at one end of the kiln head bin 1, and the output end of the heating mechanism 2 is connected to the inner cavity of the rotary kiln body 4; the tug mechanism 6 and the driving mechanism 7 are both arranged below the rotary kiln body 4 and connected to the rotary kiln body 4, for driving the rotary kiln body 4 to rotate; support boxes 3 are provided at both ends of the rotary kiln body 4, and the support boxes 3 are located between the rotary kiln body 4 and the kiln head bin 1 and between the rotary kiln body 4 and the kiln tail bin 5. The inner cavity of the rotary kiln body 4 is provided with a stirring mechanism 8, which can rotate and stir the battery raw materials in the inner cavity of the rotary kiln body 4; the stirring mechanism 8 includes at least two groups of stirring blades and a rotating shaft 82; the two ends of the rotating shaft 82 extend to the inner cavities of the two support boxes 3 respectively; each group of stirring blades are arranged at an inclined and equal distance on the outside of the rotating shaft 82, and the number of blades 81 of each group of stirring blades is not less than 2; the blades 81 and the rotating shaft 82 are both hollow structures, and an isolation net 811 is provided at the end of the blade 81 away from the rotating shaft 82, and the hollow cavity of the blade 81 is connected to the hollow cavity of the rotating shaft 82; an air pump 3 is provided inside the support box 3 at one end of the kiln tail bin 5 2. Air guide seat 33 and motor 34; the air guide seat 33 is connected to the side of the central support box 3 close to the rotary kiln body 4, and the end of the rotating shaft 82 close to the kiln tail bin 5 is located in the inner cavity of the air guide seat 33, and at least two air grooves 821 are provided on the rotating shaft 82 in the air guide seat 33; the air pump 32 is fixed in the support box 3 above the air guide seat 33, and the air inlet pipe of the air pump 32 extends to the inner cavity of the rotary kiln body 4, and the air outlet pipe of the air pump 32 is connected to the inner cavity of the air guide seat 33; the motor 34 is fixed in the support box 3 at one end of the air guide seat 33 close to the kiln tail bin 5, and the output shaft of the motor 34 extends to the inner cavity of the air guide seat 33 and is connected to one end of the rotating shaft 82, so that the motor 34 can rotate The rotating shaft 82 and the blades 81 are driven to rotate in the inner cavity of the rotary kiln body 4; wherein, the stirring blades of the stirring mechanism 8 are preferably three groups, the number of blades 81 in each group is preferably 6, and the number of the air grooves 821 is preferably 3; when the battery raw materials to be processed are injected into the interior of the rotary kiln body 4 through the feeding pipe 11 of the kiln head bin 1, the heat conducting pipe 21 will introduce the heat generated by the heating mechanism 2 into the inner cavity of the rotary kiln body 4. At this time, the rotary kiln body 4 will rotate under the action of the tug mechanism 6 and the driving mechanism 7, so that the battery raw materials in the inner cavity of the rotary kiln body 4 can be dried and moved from one end of the kiln head bin 1 to one end of the kiln tail bin 5 until the battery raw materials are completely dried and enter the kiln tail bin 5 for centralized collection;As the rotary kiln body 4 works, the air pump 32 and the motor 34 start and work. The air pump 32 draws the high-temperature gas inside the rotary kiln body 4 into the air guide seat 33, and the high-temperature gas is introduced into the hollow rotating shaft 82 through the air groove 821 of the air guide seat 33. The high-temperature gas is then transported to the blades 81 of the stirring blades by the rotating shaft 82, and finally the high-temperature gas passes through the isolation net 811 of the blades 81 and is injected back into the inner cavity of the rotary kiln body 4. The high-temperature gas impacts the battery raw materials in the inner cavity of the rotary kiln body 4, breaks up the battery raw materials, and prevents the battery raw materials from sticking together, thereby ensuring that the battery raw materials are fully in contact with the inner wall of the rotary kiln body 4, thereby improving the drying rate of the battery raw materials.

[0026] like Figure 1 、 2 As shown, in this embodiment, a feeding pipe 11 for communicating with the inner cavity of the rotary kiln body 4 is provided at the bottom of the kiln head bin 1; a heat conducting pipe 21 for communicating with the inner cavity of the rotary kiln body 4 is provided at one end of the heating mechanism 2; a material guiding pipe 51 for communicating with the inner cavity of the rotary kiln body 4 is provided at one end of the kiln tail bin 5; the feeding pipe 11, the heat conducting pipe 21 and the material guiding pipe 51 all pass through the supporting box 3 connected to the kiln head bin 1 and extend into the inner cavity of the rotary kiln body 4; wherein, the arrangement of the feeding pipe 11, the heat conducting pipe 21 and the material guiding pipe 51 can enable the heat generated by the battery raw materials to be processed and the heating mechanism 2 to be stably injected into the inner cavity of the rotary kiln body 4 through the supporting box 3 or to be conducted out from the inner cavity of the rotary kiln body 4, thereby ensuring the stable loading and unloading of the battery raw materials and the stable use of the rotary kiln body 4;

[0027] In order to prevent impurities attached to the flue gas in the rotary kiln body 4 from clogging the air pump 32 and causing damage to the air pump 32, in this embodiment, a dust-proof filter membrane (not shown in the figure) is provided at the end of the air inlet pipe of the air pump 32. The flue gas is filtered and then drawn into the air guide seat 33 through the air pump 32, thereby preventing impurities in the flue gas from clogging the air pump 32 and extending the service life of the air pump 32.

[0028] like Figure 3 As shown, in this embodiment, the rotation direction of the rotary kiln body 4 is opposite to the rotation direction of the stirring mechanism 8; wherein, by arranging the rotary kiln body 4 and the stirring mechanism 8 to rotate in opposite directions, when the high-temperature gas is injected into the inner cavity of the rotary kiln body 4 by the blades 81, it will be affected by the rotation force of the stirring mechanism 8, causing the high-temperature gas to be scattered toward the inner wall of the rotary kiln body 4, thereby effectively increasing the impact force of the gas, achieving the purpose of fully breaking up the battery raw materials, improving the uniform distribution between the battery raw materials, and further avoiding the adhesion between the battery raw materials;

[0029] like Figure 1 、 2As shown, in this embodiment, both ends of the rotary kiln body 4 are provided with connecting rings 41 for connecting the supporting boxes 3, so that the rotary kiln body 4 can rotate between the two supporting boxes 3 under the action of the tug mechanism 6 and the driving mechanism 7; in this embodiment, a heat conducting member 42 is provided in the inner cavity of the rotary kiln body 4, and the heat conducting member 42 is spirally arranged on the inner cavity side wall of the rotary kiln body 4, and a spiral material guide groove 43 is formed between the heat conducting member 42 and the inner wall of the rotary kiln body 4; in this embodiment, the spiral arrangement direction of the heat conducting member 42 and the material guide groove 43 is the same as the rotation direction of the rotary kiln body 4; wherein, a limiting groove 31 matching the connecting ring 41 is provided on the supporting box 3, so that the rotary kiln body 4 and the supporting box 3 can be rotated through the mutual cooperation between the connecting ring 41 and the limiting groove 31 to ensure The rotary kiln body 4 can rotate stably between the two supporting boxes 3 under the action of the tug mechanism 6 and the driving mechanism 7; and the arrangement of the heat conductive member 42 and the guide trough 43 can ensure that the battery raw materials can always be in contact with the heat conductive member 42 when moving along the guide trough 43 from one end of the kiln head bin 1 to one end of the kiln tail bin 5, thereby effectively drying the battery raw materials through the heat conductive member 42 and the inner wall of the rotary kiln body 4. At the same time, when the heat conductive member 42 and the guide trough 43 are used in conjunction with the stirring mechanism 8, the gas blown out from the blades 81 will impact the battery raw materials in the guide trough 43, further increasing the gas impact force and causing the battery raw materials to be continuously lifted and dropped under the influence of the heat conductive member 42 and the guide trough 43, which can not only further improve the uniformity of the drying of the battery raw materials, but also accelerate the drying of the battery raw materials and improve the drying rate of the battery raw materials.

[0030] like Figure 3 As shown, in this embodiment, the blade 81 is a flat plate structure or an arc structure; wherein the blade 81 is preferably an arc structure; the arc-shaped blade 81 has better guidance and can increase the impact force of the airflow when it rushes out from the isolation net 811;

[0031] like Figure 1 As shown, in this embodiment, the number of the tug mechanisms 6 is not less than 2; the driving mechanism 7 is located between the tug mechanisms 6; in this embodiment, a limiting ring and a gear ring connected to the tug mechanism 6 and the driving mechanism 7 are provided on the outer side of the rotary kiln body 4; wherein, the tug mechanism 6 and the driving mechanism 7 can drive the rotary kiln body 4 to rotate stably, and both belong to the prior art and will not be described in detail here;

[0032] In summary, the present invention provides a rotary kiln for processing battery raw materials, which is configured by arranging a stirring mechanism 8 in the opposite direction to the rotary kiln body 4 inside the rotary kiln body 4, and drawing the high-temperature gas in the rotary kiln body 4 into the stirring mechanism 8 through the air pump 32, so that the high-temperature gas can be injected back into the inner cavity of the rotary kiln body 4 through the rotating blades 81. The scattered high-temperature gas impacts the battery raw materials inside the rotary kiln body 4, and the battery raw materials are fully broken up to avoid adhesion of the battery raw materials, thereby ensuring sufficient contact between the battery raw materials and the inner wall of the rotary kiln body 4, and improving the drying rate of the battery raw materials.

[0033] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0034] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A rotary kiln for processing battery raw materials, comprising a kiln head bin (1), a heating mechanism (2), a rotary kiln body (4), a kiln tail bin (5), a tug mechanism (6) and a driving mechanism (7); the kiln head bin (1) and the kiln tail bin (5) are respectively arranged at both ends of the rotary kiln body (4) and are communicated with the inner cavity of the rotary kiln body (4); the heating mechanism (2) is located at one end of the kiln head bin (1), and the output end of the heating mechanism (2) is communicated with the inner cavity of the rotary kiln body (4); the tug mechanism (6) and the driving mechanism (7) are both arranged below the rotary kiln body (4) and connected to the rotary kiln body (4) for driving the rotary kiln body (4) to rotate; characterized in that: Both ends of the rotary kiln body (4) are provided with support boxes (3), and the support boxes (3) are located between the rotary kiln body (4) and the kiln head bin (1) and between the rotary kiln body (4) and the kiln tail bin (5); a stirring mechanism (8) is rotatably provided in the inner cavity of the rotary kiln body (4), and the stirring mechanism (8) comprises at least two groups of blades (81) and a rotating shaft (82); the two ends of the rotating shaft (82) extend into the inner cavities of the two support boxes (3); each group of stirring blades (81) is arranged at equal intervals on the outside of the rotating shaft (82) in an inclined shape, and each group of stirring blades (81) is arranged at equal intervals on the outside of the rotating shaft (82). The number of blades (81) is no less than 2; the blades (81) and the rotating shaft (82) are both hollow structures, an isolation net (811) is provided at one end of the blade (81) away from the rotating shaft (82), and the hollow cavity of the blade (81) is connected to the hollow cavity of the rotating shaft (82); an air pump (32), an air guide seat (33) and a motor (34) are provided inside the support box (3) at one end of the kiln tail bin (5); the air guide seat (33) is connected to the side of the center of the support box (3) close to the rotary kiln body (4), and the rotating shaft (82) is close to the kiln tail bin (5). ) is located in the inner cavity of the air guide seat (33), and at least two air grooves (821) are provided on the rotating shaft (82) in the air guide seat (33); the air pump (32) is fixed in the supporting box (3) above the air guide seat (33), and the air inlet pipe of the air pump (32) extends to the inner cavity of the rotary kiln body (4), and the air outlet pipe of the air pump (32) is connected to the inner cavity of the air guide seat (33); the motor (34) is fixed in the supporting box (3) at one end of the air guide seat (33) close to the kiln tail bin (5), and the output shaft of the motor (34) extends to the inner cavity of the air guide seat (33). The rotary kiln body (4) is provided with a heat conducting member (42) in a spiral manner in the inner cavity of the rotary kiln body (4), and is connected to one end of the rotating shaft (82), so that when the motor (34) rotates, the rotating shaft (82) and the blade (81) are driven to rotate in the inner cavity of the rotary kiln body (4); the rotation direction of the rotary kiln body (4) is opposite to the rotation direction of the stirring mechanism (8); a heat conducting member (42) is spirally provided in the inner cavity of the rotary kiln body (4), so that a spiral material guide groove (43) is formed between the heat conducting member (42) and the inner wall of the rotary kiln body (4); the spiral arrangement direction of the heat conducting member (42) and the material guide groove (43) is the same as the rotation direction of the rotary kiln body (4).

2. A rotary kiln for processing battery raw materials according to claim 1, characterized in that: The bottom of the kiln head bin (1) is provided with a feeding pipe (11) for communicating with the inner cavity of the rotary kiln body (4); one end of the heating mechanism (2) is provided with a heat conduction pipe (21) for communicating with the inner cavity of the rotary kiln body (4); one end of the kiln tail bin (5) is provided with a material guide pipe (51) for communicating with the inner cavity of the rotary kiln body (4); the feeding pipe (11), the heat conduction pipe (21) and the material guide pipe (51) all pass through the supporting box (3) on this side and extend into the inner cavity of the rotary kiln body (4).

3. A rotary kiln for processing battery raw materials according to claim 1, characterized in that: The end of the air inlet pipe of the air pump (32) is provided with a dustproof filter membrane.

4. A rotary kiln for processing battery raw materials according to any one of claims 1 to 3, characterized in that: Both ends of the rotary kiln body (4) are provided with connecting rings (41) for connecting to the supporting boxes (3), so that the rotary kiln body (4) rotates between the two supporting boxes (3) under the action of the tug mechanism (6) and the driving mechanism (7).

5. A rotary kiln for processing battery raw materials according to any one of claims 1 to 3, characterized in that: The blade (81) has a flat plate structure or an arc-shaped structure.

6. A rotary kiln for processing battery raw materials according to any one of claims 1 to 3, characterized in that: The number of the tug mechanisms (6) is no less than 2; and the driving mechanism (7) is located between the tug mechanisms (6).

7. A rotary kiln for processing battery raw materials according to claim 6, characterized in that: A limiting ring and a gear ring connected to the tug mechanism (6) and the driving mechanism (7) are provided on the outer side of the rotary kiln body (4).

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