ROTARY KILN FOR PROCESSING BATTERY RAW MATERIAL

Abstract

A rotary kiln for processing battery raw material is provided according to this application, which includes a kiln head tray, a heating mechanism, a rotary kiln body, a kiln tail tray, a towing mechanism, and a drive mechanism; a support housing is provided at each of the two ends of the rotary kiln body respectively, and the two support housings are located respectively between the rotary kiln body and the kiln head tray and between the rotary kiln body and the kiln tail tray; an agitation mechanism is provided in the internal cavity of the rotary kiln body, the agitation mechanism comprising at least two sets of agitator blades and a rotating shaft; and a gas pump, a gas guide seat, and a motor are provided inside the support housing at one end of the kiln tail tray. Figure 1

Description

Title of the invention: ROTARY OVEN FOR PROCESSING BATTERY RAW MATERIAL DOMAIN

[0001] The present application relates to the technical field of battery raw material processing, and in particular to a rotary kiln for processing battery raw material. BACKGROUND

[0002] During the manufacture of a lithium battery, it is generally necessary to perform dry treatments on the battery raw materials. Existing battery raw material drying equipment generally performs dry treatments using a rotary kiln. A rotary kiln cylinder typically has a smooth, circular arc-shaped surface, and some cylinders are equipped with a deflector so that the battery raw material can be lifted and sprinkled through the deflector as it dries. This allows the battery raw material to be dried in a relatively dynamic state, thus reducing the phenomenon of binding and accumulation of the battery raw material on an internal cylinder wall.However, the raw material cannot be fully dispersed even if the existing rotary kiln is equipped with a deflector, so the raw material that is not fully dispersed can not only be bound, but also reduce the drying rate of the raw material, making rapid drying of the battery raw material impossible. SUMMARY

[0003] One objective according to the present application is to provide a rotary kiln for processing battery raw material, in order to solve the problems mentioned in the background technology above.

[0004] In order to achieve the above objective, the technical solution of the present application is as follows: a rotary kiln for processing battery raw material comprises a kiln head tray, a heating mechanism, a rotary kiln body, a kiln tail tray, a towing mechanism, and a drive mechanism; the kiln head tray and the kiln tail tray are respectively arranged at the two ends of the rotary kiln body and are in communication with an internal cavity of the rotary kiln body; the heating mechanism is located at one end of the kiln head tray, and one outlet end of the heating mechanism is in communication with the internal cavity of the rotary kiln body; the towing mechanism and the drive mechanism are arranged under the rotary kiln body and are connected to the body of rotary kiln for driving the rotary kiln body into rotation; a support housing is provided at each of the two ends of the rotary kiln body, the two support housings being located respectively between the rotary kiln body and the kiln head tray and between the rotary kiln body and the kiln tail tray; an agitation mechanism is provided in the internal cavity of the rotary kiln body, and the agitation mechanism is configured to rotate the battery raw material in the internal cavity of the rotary kiln body; the agitation mechanism comprises at least two sets of blades and a rotating shaft; two ends of the rotating shaft extend respectively into internal cavities of the two support housings; each set of blades is spaced obliquely outside the rotating shaft, and at least two blades are provided in each set;at least two blades and the rotating shaft all have a hollow structure, a separating net is provided at one end, away from the rotating shaft, of each blade, and a hollow cavity in each blade is in communication with a hollow cavity in the rotating shaft; a gas pump, a gas guide seat and a motor are provided inside the support housing at one end of the furnace tail tray; the gas guide seat is connected on one side, near the rotary furnace body, to the center of the support housing, one end, near the furnace tail tray, of the rotating shaft is located in an internal cavity of the gas guide seat, and at least two gas grooves are defined in the rotating shaft in the gas guide seat;The gas pump is fixed in the support housing above the gas guide seat; a gas inlet pipe from the gas pump extends into the internal cavity of the rotary kiln body, and a gas outlet pipe from the gas pump communicates with the internal cavity of the gas guide seat; the motor is fixed in the support housing at one end, near the kiln tail tray, of the gas guide seat, and an output shaft from the motor extends into the internal cavity of the gas guide seat and is connected to one end of the rotary shaft, so that the motor drives the rotary shaft and at least two rotating blades in the internal cavity of the rotary kiln body when the motor rotates.

[0005] In addition, a feed pipe intended to communicate with the internal cavity of the rotary kiln body is provided at the bottom of the kiln head tray; a heat conductive pipe intended to communicate with the internal cavity of the rotary kiln body is provided at one end of the heating mechanism; a material guide pipe intended to communicate with the internal cavity of the rotary kiln body is provided at one end of the kiln tail tray; and the feed pipe, the heat conductive pipe and the material guide pipe all pass through the support housing connected to the kiln head tray and extend into the internal cavity of the rotary kiln body.

[0006] In addition, a dust filter membrane is provided at one end of the gas inlet pipe of the gas pump.

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

[0008] Furthermore, a connecting ring is provided at each of the two ends of the rotary kiln body for connection with the support housings, so that the rotary kiln body rotates between the two support housings under the action of the towing mechanism and the drive mechanism.

[0009] In addition, a heat-conducting element is provided in the internal cavity of the rotary kiln body, the heat-conducting element is arranged in a spiral on a side wall of the internal cavity of the rotary kiln body, and a spiral material guide groove is formed between the heat-conducting element and an internal wall of the rotary kiln body.

[0010] Moreover, a spiral direction of the heat-conducting element and a spiral direction of the material guide groove are identical to the direction of rotation of the rotary furnace body.

[0011] In addition, the at least two blades are of a flat plate shape structure or of a circular arc shape structure.

[0012] In addition, at least two towing mechanisms are provided; and the drive mechanism is located between the at least two towing mechanisms.

[0013] Furthermore, a limiting ring and a gear ring which are connected to at least two towing mechanisms and to the drive mechanism are provided outside the rotary kiln body.

[0014] The beneficial effects of the present application compared to conventional technology are as follows:

[0015] In the present application, the stirring mechanism having the direction of rotation opposite to that of the rotary kiln body is provided inside the rotary kiln body, and the high-temperature gas inside the rotary kiln body is pumped into the stirring mechanism through the gas pump, so that the high-temperature gas can be reinjected into the internal cavity of the rotary kiln body through the rotating blades, and the battery raw material inside the rotary kiln body can be fully dispersed through the diffusion high-temperature gas impacting the battery raw material inside the rotary kiln body, which prevents the battery raw material from binding, ensures sufficient contact between the battery raw material and the internal wall of the rotary kiln body, and improves the drying speed of the battery raw material.

[0016] In the present application, the spiral heat-conducting element and the spiral material guide groove are provided in the inner wall of the rotary kiln body, and the spiral material guide groove is defined in the heat-conducting element, so that the battery raw material can always be in contact with the heat-conducting element as the battery raw material moves along the material guide groove from one end of the furnace head tray to one end of the furnace tail tray, effectively drying the battery raw material through the heat-conducting element and the inner wall of the rotary furnace body.In addition, after using the heat conductive element and the material guide groove to cooperate with the stirring mechanism, the gas blown from the blades can impact the battery raw material in the material guide groove to further increase the gas impact force, so that the battery raw material continuously rises and falls under the influence of the heat conductive element and the material guide groove, which can not only further improve the uniformity of the drying of the battery raw material, but also accelerate the drying of the battery raw material and improve the drying speed of the battery raw material. Brief description of the drawings

[0017] [Fig. 1] is a schematic front view of a rotary kiln according to the present application;

[0018] [Fig.2] is a front cross-sectional view of the rotary kiln after the housings of support and a rotary kiln body according to the present application;

[0019] [Fig.3] is a cross-sectional side view of the rotary kiln body according to the present application; and

[0020] [Fig.4] is an enlarged schematic view of part A in [Fig.2] according to this application;

[0021] In the drawings, the reference numbers are as follows: 1, oven head tray; 2, heating mechanism; 3, support box; 32, gas pump; 34, engine; 41, connecting ring; 43, material guide groove; 51, material guide pipe; 7, drive mechanism; 81, pale; 82, rotating shaft; 11, supply pipe; 21, heat conduction pipe; 31, limiting groove; 33, gas guide seat; 4, rotary kiln body; 42, heat-conducting element 5, oven tail tray; 6, towing mechanism; 8, agitation mechanism; 811, separation net; 821, gas groove. DETAILED DESCRIPTION OF THE IMPLEMENTATION METHODS

[0022] The embodiments of this application are described in detail below, and examples of embodiments are shown in the drawings, in which identical or similar reference numerals represent identical or similar elements or elements having identical or similar functions throughout the description. The embodiments described below with reference to the drawings are only examples of embodiments used to explain this application and shall not be construed as limiting this application.

[0023] Embodiment 1:

[0024] As shown in Figures 1 to 4, a rotary kiln for processing battery raw material comprises a kiln head tray 1, a heating mechanism 2, a rotary kiln body 4, a kiln tail tray 5, a towing mechanism 6 and a drive mechanism 7; the kiln head tray 1 and the kiln tail tray 5 are respectively arranged at the two ends of the rotary kiln body 4 and are in communication with an internal cavity of the rotary kiln body 4; the heating mechanism 2 is located at one end of the kiln head tray 1, and an outlet end of the heating mechanism 2 is in communication with the internal cavity of the rotary kiln body 4; the towing mechanism 6 and the drive mechanism 7 are arranged under the rotary kiln body 4 and are connected to the rotary kiln body 4 to drive the rotary kiln body 4 in rotation;a support housing 3 is provided at each of the two ends of the rotary kiln body 4, the two support housings 3 are located respectively between the rotary kiln body 4 and the kiln head tray 1 and between the rotary kiln body 4 and the kiln tail tray 5; an agitation mechanism 8 is provided in the internal cavity of the rotary kiln body 4, the agitation mechanism 8 can proportionally agitate the battery raw material in the internal cavity of the rotary kiln body 4, the agitation mechanism 8 comprises at least two groups of blades and has a rotating shaft 82; two ends of the rotating shaft 82 extend respectively into internal cavities of the two support housings 3; each group of blades 81 is obliquely spaced outside the rotating shaft 82, and at least two blades 81 are provided in each group;the blades 81 and the rotating shaft 82 all have a hollow structure, a separating net 811 is provided at one end, away from the rotating shaft 82, of each blade 81, and a hollow cavity of each blade 81 is in communication with a hollow cavity of the rotating shaft 82; a gas pump 32, a gas guide seat 33 and a motor 34 are provided inside the support housing 3 at one end of the furnace tail tray 5; the gas guide seat 33 is connected on one side, near the rotating furnace body 4, to the center of the support housing 3, one end, near the furnace tail tray 5, of the rotating shaft 82 is located in an internal cavity of the gas guide seat 33, and at least two gas grooves 821 are defined in the rotating shaft 82; in the gas guide seat 33; the gas pump 32 is fixed in the support housing 3 above the gas guide seat 33, a gas inlet pipe of the gas pump 32 extends to the internal cavity of the rotary kiln body 4, and a gas outlet pipe of the gas pump 32 is in communication with the internal cavity of the gas guide seat 33; the motor 34 is fixed in the support housing 3 at one end, near the kiln tail tray 5, of the gas guide seat 33, and an output shaft of the motor 34 extends into the internal cavity of the gas guide seat 33 and is connected to one end of the rotary shaft 82, so that the motor 34 drives the rotary shaft 82 and the blades 81 in rotation in the internal cavity of the rotary kiln body 4 when the motor 34 rotates.Three groups of agitator blades of the agitator mechanism 8 are preferably provided, six blades 81 are preferably provided in each group, and three gas grooves 821 are preferably provided; after the injection of the battery raw material to be processed into the rotary kiln body 4 through the feed pipe 11 from the head kiln bin 1, the heat conductor pipe 21 conducts the heat generated by the heating mechanism 2 into the internal cavity of the rotary kiln body 4, and the rotary kiln body 4 rotates under the action of the towing mechanism 6 and the drive mechanism 7, so that the battery raw material in the internal cavity of the rotary kiln body 4 can be dried and moved from one end of the head kiln bin 1 to one end of the tail kiln bin 5, and the battery raw material enters the tail kiln bin 5 for centralized collection after the complete drying of the battery raw material.During the operation of the rotary kiln body 4, the gas pump 32 and the motor 34 start and run. The high-temperature gas inside the rotary kiln body 4 is pumped by the gas pump 32 into the gas guide seat 33, is conducted into the hollow rotating shaft 82 by the gas guide seat 33 through the gas grooves 821, then is delivered by the rotating shaft 82 into the agitator blades 81, and finally the high-temperature gas is reinjected into the internal cavity of the rotary kiln body 4 through the separating grooves 811 of the blades 81. The battery raw material in the internal cavity of the rotary kiln body 4 is impacted by the high-temperature gas and dispersed, which prevents the battery raw material from binding, ensures sufficient contact between the battery raw material and the internal wall of the rotary kiln body 4, and improves the drying speed of the battery raw material.

[0025] As shown in [Fig. 1] and [Fig. 2], in this embodiment, a feed pipe 11 for communicating with the internal cavity of the rotary kiln body 4 is provided at one end of the kiln head tray 1; the heat conduction pipe 21 for communicating with the internal cavity of the rotary kiln body 4 is provided at one end of the heating mechanism 2; a material guide pipe 51 for Communication with the internal cavity of the rotary kiln body 4 is provided at one end of the kiln tail tray 5; and the feed pipe 11, the heat conduction pipe 21 and the material guide pipe 51 all pass through the support housing 3 connected to the kiln head tray 1 and extend into the internal cavity of the rotary kiln body 4. The arrangement of the feed pipe 11, the heat conduction pipe 21 and the material guide pipe 51 makes it possible to process the heat generated by the battery raw material and to stably inject or expel the heating mechanism 2 from the internal cavity of the rotary kiln body 4 through the support housings 3, which ensures the stable feeding and discharging of the battery raw material and the stable operation of the rotary kiln body 4.

[0026] In order to prevent impurities attached to the fumes in the rotary kiln body 4 from blocking the gas pump 32 and damaging the gas pump 32, in this embodiment, a dust filter membrane (not shown in the figure) is provided at one end of the gas inlet pipe of the gas pump 32, so that the fumes can be filtered and then pumped into the gas guide seat 33 through the gas pump 32, which prevents the gas pump 32 from being blocked by impurities in the fumes, and extends the service life of the gas pump 32.

[0027] As shown in [Fig.3], in this embodiment, one direction of rotation of the rotary kiln body 4 is opposite to one direction of rotation of the stirring mechanism 8. The rotary kiln body 4 and the stirring mechanism 8 are provided to rotate in opposite directions, so that the high-temperature gas is affected by the rotational force of the stirring mechanism 8 when the high-temperature gas is injected into the internal cavity of the rotary kiln body 4 through the blades 81, and the diffusion high-temperature gas strikes the internal wall of the rotary kiln body 4, which effectively increases the impact force of the gas, achieves the objective of completely dispersing the battery raw material, improves the uniform distribution between the battery raw materials, and further prevents the binding between the battery raw materials.

[0028] As shown in [Fig. 1] and [Fig. 2], in this embodiment, a connecting ring 41 is provided at each of the two ends of the rotary kiln body 4 for connection with the support housings 3, so that the rotary kiln body 4 rotates between the two support housings 3 under the action of the towing mechanism 6 and the drive mechanism 7. In this embodiment, a heat-conducting element 42 is provided in the internal cavity of the rotary kiln body 4. The heat-conducting element 42 is arranged spirally on a lateral wall of the internal cavity of the rotary kiln body 4, and a spiral material guide groove 43 is formed between the heat-conducting element 42 and the internal wall of the rotary kiln body 4. In this embodiment, a spiral direction of the heat-conducting element The heat 42 and the spiral direction of the material guide groove 43 are identical to the direction of rotation of the rotary kiln body 4. A limiting groove 31 corresponding to the connecting ring 41 is provided in each support housing 3, so that the rotary kiln body 4 and the support housing 3 can be connected in rotation by the mutual cooperation between the connecting ring 41 and the limiting groove 31, which ensures stable rotation of the rotary kiln body 4 between the two support housings 3 under the action of the towing mechanism 6 and the drive mechanism 7.The arrangement of the heat conductive element 42 and the material guide groove 43 allows the battery raw material to always be in contact with the heat conductive element 42 when the battery raw material moves along the material guide groove 43 from one end of the furnace head tray 1 to one end of the furnace tail tray 5, which efficiently dries the battery raw material through the heat conductive element 42 and the inner wall of the rotary furnace body 4.In addition, when the heat conductive element 42 and the material guide groove 43 are used to cooperate with the stirring mechanism 8, the gas blown by the blades 81 impacts the battery raw material in the material guide groove 43 to further increase the impact force of the gas, so that the battery raw material continuously rises and falls under the influence of the heat conductive element 42 and the material guide groove 43, which can not only further improve the uniformity of the drying of the battery raw material, but also accelerate the drying of the battery raw material and improve the drying speed of the battery raw material.

[0029] As shown in [Fig. 3], in this embodiment, the blades 81 have a flat plate structure or a circular arc structure. Preferably, the blades 81 have a circular arc structure, and circular arc blades 81 have better guidance, which can increase the impact force when the gas flows out of the separation nets 811.

[0030] As shown in [Fig. 1], in this embodiment, at least two towing mechanisms 6 are provided; and the drive mechanism 7 is located between the at least two towing mechanisms 6. In this embodiment, a limiting ring and a gear ring which are connected to the at least two towing mechanisms 6 and the drive mechanism 7 are provided outside the rotary kiln body 4. The at least two towing mechanisms 6 and the drive mechanism 7 can drive the rotary kiln body 4 in stable rotation; both belong to conventional technology and are not described here.

[0031] In summary, in the rotary kiln for processing battery raw material supplied by this application, the stirring mechanism 8 having the direction of rotation Opposite to that of the rotary kiln body 4 is provided inside the rotary kiln body 4, and the high-temperature gas inside the rotary kiln body 4 is pumped into the stirring mechanism 8 through the gas pump 32, so that the high-temperature gas can be reinjected into the internal cavity of the rotary kiln body 4 through the rotating blades 81, and the battery raw material inside the rotary kiln body 4 can be fully dispersed through the diffusion high-temperature gas impacting the battery raw material inside the rotary kiln body 4, which prevents the battery raw material from binding, ensures sufficient contact between the battery raw material and the internal wall of the rotary kiln body 4, and improves the drying speed of the battery raw material.

[0032] Any reference in this specification to "an embodiment", "a particular embodiment", "an example", "a specific embodiment", and "a particular example", etc., means that a particular functionality, structure, or feature described in relation to the embodiment is included in at least one embodiment of the application. In this specification, the schematic expression of the above terms shall not be understood as referring to the same embodiment or example. Furthermore, the specific functionalities, structures, materials, or features described may be combined in any one or more of the embodiments or examples in a suitable manner. In addition, a person skilled in the art may combine and compose different embodiments or examples described in this specification.

[0033] Although the embodiments of this disclosure have been represented and described above, it should be understood that the above embodiments are examples and are not intended to limit the scope of this application. Those skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. Demands Rotary kiln for processing battery raw material, comprising a kiln head tray (1), a heating mechanism (2), a rotary kiln body (4), a kiln tail tray (5), a towing mechanism (6) and a drive mechanism (7); wherein the kiln head tray (1) and the kiln tail tray (5) are respectively arranged at the two ends of the rotary kiln body (4) and are in communication with an internal cavity of the rotary kiln body (4); the heating mechanism (2) is located at one end of the kiln head tray (1), and an outlet end of the heating mechanism (2) is in communication with the internal cavity of the rotary kiln body (4); the towing mechanism (6) and the drive mechanism (7) are arranged under the rotary kiln body (4) and are connected to the rotary kiln body (4) to drive the rotary kiln body (4) in rotation;a support housing (3) is provided at each of the two ends of the rotary kiln body (4), the two support housings (3) are respectively located between the rotary kiln body (4) and the kiln head tray (1) and between the rotary kiln body (4) and the kiln tail tray (5); an agitation mechanism (8) is provided in the internal cavity of the rotary kiln body (4), and the agitation mechanism (8) is configured to rotate the battery feed material in the internal cavity of the rotary kiln body (4); the agitation mechanism (8) comprises at least two groups of blades (81) and a rotating shaft (82); two ends of the rotating shaft (82) extend respectively into internal cavities of the two support housings (3); each group of blades is obliquely spaced outside the rotating shaft (82), and at least two blades are provided in each group;at least two blades (81) and the rotating shaft (82) all have a hollow structure, a separating net (811) is provided at one end, away from the rotating shaft (82), of each blade (81), and a hollow cavity in each blade (81) is in communication with a hollow cavity in the rotating shaft (82); a gas pump (32), a gas guide seat (33) and a motor (34) are provided inside the support housing (3) at one end of the furnace tail tray (5); the gas guide seat (33) is connected on one side, near the rotary furnace body (4), to the center of the support housing (3), and, at one end, near the;

2. furnace tail tray (5), the rotating shaft (82) is located in an internal cavity of the gas guide seat (33), and at least two gas grooves (821) are defined in the rotating shaft (82) in the gas guide seat (33); the gas pump (32) is fixed in the support housing (3) above the gas guide seat (33), a gas inlet pipe of the gas pump (32) extends to the internal cavity of the rotary furnace body (4), and a gas outlet pipe of the gas pump (32) is in communication with the internal cavity of the gas guide seat (33));the motor (34) is fixed in the support housing (3) at one end, near the furnace tail tray (5), the gas guide seat (33), and an output shaft of the motor (34) extends into the internal cavity of the gas guide seat (33) and is connected to one end of the rotating shaft (82), so that the motor (34) drives the rotating shaft (82) and the at least two blades (81) in rotation within the internal cavity of the rotating furnace body (4) when the motor (34) rotates; in which a direction of rotation of the rotary kiln body (4) is opposite to a direction of rotation of the stirring mechanism (8); in which a heat-conducting element (42) is provided in the internal cavity of the rotary kiln body (4), the heat-conducting element (42) is arranged in a spiral on a lateral wall of the internal cavity of the rotary kiln body (4), and a spiral material guide groove (43) is formed between the heat-conducting element (42) and an internal wall of the rotary kiln body (4); in which a spiral direction of the heat-conducting element (42) and a spiral direction of the material guide groove (43) are identical to the direction of rotation of the rotary kiln body (4). A rotary kiln for processing battery raw material according to claim 1, wherein a feed pipe (11) for communicating with the internal cavity of the rotary kiln body (4) is provided at the bottom of the kiln head tray (1); a heat-conducting pipe (21) for communicating with the internal cavity of the rotary kiln body (4) is provided at one end of the heating mechanism (2); a material guide pipe (51) for communicating with the internal cavity of the rotary kiln body (4) is provided at one end of the kiln tail tray (5); and the feed pipe (11), the heat-conducting pipe (21), and the pipe material guide slurries (51) all pass through the support housing (3) connected to the furnace head tray (1) and extend into the internal cavity of the rotary furnace body (4).

3. Rotary furnace for processing battery raw material according to claim 1, wherein a dust-filtering membrane is provided at one end of the gas inlet pipe of the gas pump (32).

4. Rotary furnace for processing battery raw material according to claim 1, wherein a connecting ring (41) is provided at each of the two ends of the rotary furnace body (4) for connection with the support housings (3), so that the rotary furnace body (4) rotates between the two support housings (3) under the action of the towing mechanism (6) and the drive mechanism (7)

5. Rotary furnace for processing battery raw material according to claim 1, wherein the at least two blades (81) are of a flat plate-shaped structure or a circular arc-shaped structure.

6. Rotary furnace for processing battery raw material according to any one of claims 1 to 3, wherein at least two towing mechanisms (6) are provided; and the drive mechanism (7) is located between the at least two towing mechanisms (6).

7. Rotary furnace for processing battery raw material according to claim 6, wherein a limiting ring and a gear ring which are connected to at least two towing mechanisms (6) and the drive mechanism (7) are provided outside the rotary furnace body (4).