Lithium-ion battery-powered rotary oven with heat recovery mechanism

Abstract

A lithium battery rotary kiln with heat recovery mechanism includes a kiln tail tray, a towing mechanism, a drive mechanism, a rotary kiln body and a kiln head tray; one end of the rotary kiln body is provided with a first material guide end, a cooling tray is arranged under the first material guide end, and a material guide mechanism is arranged in the cooling tray, a first heat exchange component penetrates vertically into the center of the material guide mechanism;A thermal energy recovery tank is arranged under the towing mechanism and the drive mechanism; a first baffle and a second baffle are arranged in the thermal energy recovery tank, so that the thermal energy recovery tank is divided into a dust removal cavity, a heat exchange cavity and a water storage cavity by the first baffle and the second baffle.

Description

Title of the invention: Lithium-powered rotary oven with heat recovery mechanism HEAT DOMAIN

[0001] The present application relates to the technical field of the rotary battery processing furnace, and in particular to a lithium battery rotary furnace with a heat recovery mechanism. BACKGROUND

[0002] In the lithium battery production process, a rotary kiln is used to sinter the battery materials. When existing lithium battery materials are injected into the internal cavity of a rotary kiln for sintering, agglomeration often occurs. Consequently, when lithium battery material is injected into the rotary kiln for sintering, local over-combustion or local sintering can occur, reducing the uniformity of the battery materials after sintering and also affecting their quality. Furthermore, during the sintering process in the rotary kiln for battery materials, a large amount of high-temperature fumes can be generated at the kiln tail end. If these high-temperature fumes are vented directly, they can not only waste thermal energy but also pollute the environment.In conventional technology, although thermal energy can be recovered by heat exchange to reduce the energy consumption of production equipment, the recovered thermal energy cannot be fully utilized and cannot serve as a bridge to establish cooperative work with flue gas treatment equipment, material cooling equipment and material agglomeration prevention structure. SUMMARY

[0003] One object according to the present application is to provide a lithium battery rotary oven with a heat recovery mechanism, so as to solve the problems mentioned in the prior art above.

[0004] In order to achieve the above objective, the solution of the present application is: a lithium battery-powered rotary kiln with a heat recovery mechanism comprises a kiln tail tray, a towing mechanism, a drive mechanism, a rotary kiln body and a kiln head tray; the kiln tail tray and the kiln head tray are respectively arranged at the two ends of the rotary kiln body; the towing mechanism and the drive mechanism are both arranged under the rotary kiln body and connected to the rotary kiln body to drive the rotary kiln body in rotation; one end, near the kiln tail tray, of the rotary kiln body is provided with a first material guide end, a cooling tray is arranged under the first material guide end, and a material guide mechanism is arranged in the cooling tray, two ends of the material guide mechanism are in communication respectively with the first material guide end and the kiln tail tray, a first heat exchange component penetrates vertically into the center of the material guide mechanism; a thermal energy recovery tray is arranged under the towing mechanism and the drive mechanism, a first baffle and a second baffle are arranged in the thermal energy recovery tray,so that the thermal energy recovery tank is divided into a dust collection cavity, a heat exchange cavity, and a water storage cavity by the first and second baffles; a filter is arranged under the first baffle, and an overflow hole is arranged on the second baffle; a dust collection and heat exchange component is arranged in the dust collection cavity, and a second heat exchange component is arranged in the heat exchange cavity; the dust collection cavity is connected to an internal cavity of the first material guide end via an air duct; the dust collection cavity is connected to an internal cavity of the cooling tank via a water return pipe; the water storage cavity is provided with a liquid extraction pump.and the water storage cavity is filled with coolant; a three-way pipe is arranged outside the thermal energy recovery tank, and three water outlets of the three-way pipe are respectively connected to a first water inlet pipe, a second water inlet pipe and a water injection pipe, the first water inlet pipe is in communication with the first heat exchange component, and the second water inlet pipe is in communication with the dust collection and heat exchange component, the water injection pipe is in communication with the liquid extraction pump, the liquid extraction pump can inject the coolant into the water storage cavity in the three-way pipe through the water injection pipe,and conduct the coolant into the first heat exchange component and the dust collection and heat exchange component respectively through the three-way pipe; the coolant cools the materials falling into the first material guide end, and performs dust collection and heat exchange cooling on the high-temperature fumes in the first material guide end; one end of the second heat exchange assembly is connected to an inert gas pipe, and the other end of the second assembly, The heat exchanger is connected to the internal cavity of the second material guide end via an air injection pipe; the inert gas undergoes heat exchange through the second heat exchanger assembly and is then injected into the rotary kiln body through the second material guide end; a burner, a support plate, and a feed mechanism are arranged in the kiln head tray; the support plate is connected to one upper end of the internal cavity of the kiln head tray; the burner is fixed above the support plate to generate a high-temperature gas and inject the high-temperature gas into the rotary kiln body; the feed mechanism is fixed to the side of the support plate near the second material guide end and is used to transport the lithium battery materials to be processed into the rotary kiln body.

[0005] In addition, the number of towing mechanisms is not less than two; the drive mechanism is located between the towing mechanisms; an outer side of the rotary kiln body is provided with a limiting ring and a gear ring which are connected to the towing mechanism and the drive mechanism.

[0006] In addition, a discharge port 61 is arranged on one side, near the rotary kiln body, of the second material guide end, and a feed port is arranged on one side, near the kiln head tray, of the second material guide end; both sides of the second material guide end between the discharge port and the feed port are provided with air guide nets, and the outer side of the air guide net inside the kiln head tray is provided with a gas collection cover; the gas collection cover is in communication with the gas injection pipe, so that the inert gas flowing in the gas injection pipe can be injected into the internal cavity of the second material guide end through the gas collection cover and enter the rotary kiln body;A feed wheel is arranged to rotate within the internal cavity of the second end of the material guide, and a drive piece used to drive the feed wheel to rotate is arranged in the furnace head tray; a space is arranged between the wheel blades of the feed wheel to transport the lithium battery material to be processed.

[0007] Furthermore, the drive unit is located in the furnace head tray above the support plate; the drive unit comprises a first gear, a motor, and a second gear; the motor is fixed to the top inside the furnace head tray; the first gear is arranged to rotate on an output shaft of the motor; one end of the rotating shaft of the feed wheel fits into a Inside the furnace head tray, the second gear is fixed to the rotating shaft of the feed wheel and meshed with the first gear, so that when the motor drives the first gear into rotation, the second gear can be engaged to drive the feed wheel into rotation synchronously.

[0008] In addition, the rotating shaft of the feed wheel is a hollow shaft, a thermal conduction pipe from the burner is inserted into the internal cavity of the rotary furnace body through the hollow shaft of the feed wheel.

[0009] In addition, the material guidance mechanism includes a collection hopper and a first heat exchange coil, the first heat exchange coil is arranged vertically in the internal cavity of the cooling tray, the collection hopper is connected to an upper end of the first heat exchange coil, and a lower end of the first heat exchange coil is connected to the furnace tail tray.

[0010] Furthermore, the bottom of the internal cavity of the first material guide end is provided with a guide hopper, the bottom end of the guide hopper is connected to a pipe, and the bottom end of the pipe is inserted into the material opening of the collection hopper.

[0011] Furthermore, the first heat exchange component is a spray pipe, and the spray pipe is uniformly provided with several spray heads, the upper end of the spray pipe is in communication with the first water inlet pipe.

[0012] In addition, the dust removal and heat exchange component is a spray seat, and the bottom of the spray seat is uniformly provided with several spray heads, and the spray seat is connected to the second water inlet pipe.

[0013] In addition, the second heat exchange component is a second heat exchange coil, the second heat exchange coil is arranged at the bottom of the heat exchange cavity, one end of the second heat exchange coil is connected to the external inert gas pipe, and the other end of the second heat exchange coil is connected to the gas injection pipe.

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

[0015] two ends of the rotary kiln body are respectively provided with a first material guide end and a second material guide end, and a cooling tray and a heat recovery tray in communication with each other are provided under the rotary kiln body, and the high-temperature fumes produced by the rotary kiln can be introduced into the dust collection cavity of the heat recovery tray through the air duct, the cooling water Discharge is sprayed through the second spray seat into the dust-removal cavity to cool and remove dust from the fumes. After the impurities in the fumes are filtered through the filter, the clean gas is discharged, thus reducing the environmental impact. The exchanged hot water can heat the inert gas (nitrogen) circulating in the second heat exchange coil. The nitrogen is then heated and introduced into the gas collection cover of the furnace head pan through the gas discharge pipe. The inert gas can then impact the lithium battery material carried inside the material guide end, dispersing and pre-drying the lithium battery material. This not only reduces over-combustion or pinching of the lithium battery materials during sintering due to agglomeration,but ensures uniformity of material sintering and improves the temperature of the battery material by preheating, so that the sintering time of the battery material is shortened and the sintering speed is improved; and after the sintered lithium battery material is introduced into the cooling tank from the first end of the material guide, the heat on the material surface in the first heat exchange coil can be removed by cold water sprayed from the first spray seat, which can not only reduce the temperature of the materials, but also remove heat from the materials with cold water to increase the temperature of the cold water, so that the heated water can be introduced into the heat recovery tank through the return pipe, the heated water is mixed with the hot water in the dust removal cavity,then supplied to the heat exchange cavity for secondary heat exchange of the inert gas circulating in the second heat exchange coil, which allows for the complete recycling of heat in the fumes and sintered materials, reduces resource waste, and further achieves the effect of fume treatment, material cooling, and prevention of material cohesion, thereby saving energy consumption and enabling collaborative work between components;

[0016] In the present application, the feed wheel is arranged inside the first material guide end, and the gas collection cover connected to the air supply pipe and the drive piece used to rotate the feed wheel are arranged in the furnace head tray. After the battery material is injected into the first material guide end, the drive piece can rotate the feed wheel to push the material into the internal cavity of the rotary kiln. When heated inert gas (nitrogen) is introduced into the material guide end through the gas collection cover, it can impact the lithium battery materials transported in the space between the feed wheels inside the first guide end. of material, before the lithium battery material enters the rotary kiln, the lithium battery material is fully dispersed, preheated and pre-dried, which effectively reduces agglomeration between lithium battery materials, increases the initial processing temperature of lithium battery materials and prevents over-combustion or sintering of materials and shortens the sintering time. Brief description of the drawings

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

[0018] [Fig.2] is a schematic cross-sectional view of the rotary kiln of the present request ;

[0019] [Fig.3] is an enlarged schematic diagram of the structure in A in [Fig.2] of the present request;

[0020] [Fig.4] is a schematic cross-sectional structure of one end of material guidance 2 of this application;

[0021] [Fig.5] is a structural cross-sectional diagram of a cooling tank of the present request.

[0022] In the drawings, the list of components represented by each reference number is as follows:

[0023] Furnace tail tray 1, first material guide end 2, material guide hopper 21, air guide pipe 22, towing mechanism 3, drive mechanism 4, rotary furnace body 5, material guide end 6, discharge port 61, feed wheel 62, feed port 63, air guide net 64, furnace head tray 7, gas collection cover 71, first gear 72, motor 73, second gear 74, burner 75, support plate 76, feed mechanism 77, cooling tray 8, first water inlet pipe 81, collection hopper 82, spray pipe 83, first heat exchange coil 84, water return pipe 85, heat recovery tray 9, three-way pipe 91, second water inlet pipe 92, water injection pipe 93, gas injection pipe 94, spray seat 95, filter 96, first baffle 97, second heat exchange coil 98, second baffle 99. DETAILED DESCRIPTION OF THE IMPLEMENTATION METHODS

[0024] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, in which identical or similar reference numbers 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 which are used to explain the present request, and should not be interpreted as limiting the present request.

[0025] Embodiment 1:

[0026] As shown in Figures 1 to 5, a lithium battery rotary kiln with a heat recovery mechanism, comprising a kiln tail tray 1, a towing mechanism 3, a drive mechanism 4, a rotary kiln body 5 and a kiln head tray 7; the kiln tail tray 1 and the kiln head tray 7 are respectively arranged at the two ends of the rotary kiln body 5; the towing mechanism 3 and the drive mechanism 4 are both arranged under the rotary kiln body 5 and connected to the rotary kiln body 5, thus driving the rotary kiln body 5 in rotation;one end, near the tail tray of the furnace 1, of the rotary furnace body 5 is provided with a first material guide end 2, and a cooling tray 8 is arranged under the first material guide end 2, the cooling tray 8 is provided with a material guide mechanism, and the two ends of the material guide mechanism are respectively connected to the first material guide end 2 and to the tail tray of the furnace 1, a first heat exchange component is inserted vertically in the center of the material guide mechanism;a heat recovery tray 9 is arranged under the towing mechanism 3 and the drive mechanism 4, the heat recovery tray 9 is provided inside with a first baffle 97 and a second baffle 99, and the heat recovery tray 9 is separated into a dust collection cavity, a heat exchange cavity and a water storage cavity by the first baffle 97 and the second baffle 99 alternately; a filter 96 is arranged under the first baffle 97, and an overflow hole is arranged on the second baffle 99;a dust collection and heat exchange component is arranged in the dust collection cavity, and a second heat exchange assembly is arranged in the heat exchange cavity; the dust collection cavity is in communication with this internal cavity from the first end of material guide 2 through the air guide pipe 22, and the dust collection cavity is in communication with the internal cavity of the cooling tank 8 through the return pipe 85; a liquid extraction pump is arranged in the water storage cavity, and the water storage cavity is filled with coolant;a three-way pipe 91 is arranged outside the thermal energy recovery tank 9, three water inlets of the three-way pipe 91 are respectively connected to a first water inlet pipe 81, a second water inlet pipe 92 and a water injection pipe 93, the first water inlet pipe 81 is in communication with the first heat exchange component, the second water inlet pipe 92 is in communication with the dust collection and heat exchange component, and the pipe; water injection 93 is in communication with the liquid extraction pump, so that the liquid extraction pump can inject the coolant into the water storage cavity in the three-way pipe 91 through the water injection pipe 93, the coolant is introduced into the first heat exchange component and the dust removal and heat exchange component respectively through the three-way pipe 91, and cools the falling material at the first material guide end 2 and performs dust removal and heat exchange cooling for the high temperature fumes at the first material guide end 2;one end of the second heat exchange component is connected to an inert gas pipe, the other end of the heat exchange component 2 is in communication with the internal cavity of the second material guide end 6 through the air injection pipe 94, the inert gas is injected into the rotary kiln body 5 through the second material guide end 6 after being heated by the heat exchange of the second heat exchange component; the kiln head cavity 7 is provided inside with a burner 75, a support plate 76 and a feed mechanism 77, the support plate 76 is connected to the upper end of the internal cavity of the kiln head tray 7, the burner 75 is fixed above the support plate 76 to generate a high-temperature gas and inject the high-temperature gas into the rotary kiln body 5;the feeding mechanism 77 is fixed to the side, near the second end of the material guide 6, of the support plate 76, which is used to transport the lithium battery materials to be processed inside the rotary kiln body 5; the inner wall of the rotary kiln body 5 is provided with a material strip (not shown in the figure), so that the lithium battery material can be lifted and dispersed by the rotating material strip during processing inside the rotary kiln body 5, so as to avoid sticking caused by the accumulation of battery materials;The two ends of the rotary kiln body 5 are provided with connecting rings (not shown in the figure), which are used to connect the first material guide end 2 and the second material guide end 6, and the rotary kiln body 5 can rotate stably between the first material guide end 2 and the second material guide end 6 under the action of the towing mechanism 3 and the drive mechanism 4;

[0027] as shown in [Fig. 2], in this embodiment, the material guiding mechanism comprises a collection hopper 82 and a first heat exchange coil 84, the first heat exchange coil pipe 84 is arranged vertically in the internal cavity of the cooling tank 8, the collection hopper 82 is connected to the upper end of the first heat exchange coil 84, and the lower end of the first heat exchange coil 84 is connected to the furnace tail tray 1; in this embodiment, the bottom of the internal cavity of the first material guide end 2 is provided with a guide hopper 21, the bottom end of the guide hopper 21 is connected to a pipe, and the bottom end of the pipe is inserted into the material opening of the collection hopper 82; in this embodiment, the first heat exchange component is a spray pipe 83, and the spray pipe 83 is uniformly provided with several spray heads, the upper end of the spray pipe 83 is in communication with the first water inlet pipe 81;In this embodiment, the dust removal and heat exchange component is a spray seat 95, and the bottom of the spray seat 95 is uniformly provided with several spray heads, and the spray seat 95 is connected to the second water inlet pipe 92; in this embodiment, the second heat exchange component is a second heat exchange coil 98, the second heat exchange coil 98 is arranged at the bottom of the heat exchange cavity, one end of the second heat exchange coil 98 is connected to the external inert gas pipe, and the other end of the second heat exchange coil 98 is connected to the gas injection pipe 94;when the heat exchange coil rotates between the first material guide end 2 and the second material guide end 6 under the action of the towing mechanism 3 and the drive mechanism 4, the lithium battery materials to be processed in the furnace head tray 7 are sent into the second material guide end 6 through the feeding mechanism 77, and then conveyed into the internal cavity of the rotary furnace body 5 through the second material guide end 6, so that the heat generated by the combustion of the burner 75 can be used for sintering the lithium battery material in the cavity of the rotary furnace body 5;the high temperature fumes generated by the sintering are introduced into the dust removal cavity of the heat recovery tank 9 through the air duct 22 at the first end of material guide 2, the sintered lithium battery material is introduced into the collection hopper 82 through the material guide hopper 21 from the first end of material guide 2 and sent into the first heat exchange coil 84; after the high-temperature fumes enter the dust-removal cavity, the water pump in the water storage cavity can pump the coolant into the water injection pipe 93 and conduct it into the first water inlet pipe 81 and the second water inlet pipe 92 through the three-way pipe 91, the first water inlet pipe 81 can inject the coolant into the spray pipe 83, the coolant is sprayed onto the surface of the first; heat exchange coil 84 through spray heads on spray pipe 83, and the high-temperature lithium battery material carried in the first heat exchange coil 84 undergoes heat exchange and is cooled, so that the sintered lithium battery material can be cooled and then sent to the furnace tail tray 1; the second water inlet pipe 92 can inject the coolant into the spray seat 95 and spray the coolant through the spray heads of the spray seat 95, thus enveloping the impurities in the high-temperature fumes and reducing the temperature of the fumes, and the cloudy coolant collected in the dust-collecting cavity after spraying can be heated using the thermal energy of the fumes, so that after the heated cloudy coolant is filtered by the filter 96,The inert gas (nitrogen) circulating in the second heat exchange coil 98 can undergo heat exchange with the coolant and be heated. After heating, nitrogen is introduced into the second material guide end 6 through the gas injection pipe 94 to preheat the lithium battery material in the second material guide end 6, and enters the internal cavity of the rotary kiln body 5 with the heated lithium battery material. The lithium battery material can be preheated and dried beforehand by the recovered thermal energy, thus preventing the agglomeration of the lithium battery material, shortening the sintering time of the battery materials, and improving the sintering speed of the battery materials in the rotary kiln body 5, and further ensuring that the lithium battery material can be sintered stably under the action of nitrogen.and ensures the stability of the sintering of the lithium battery material in the rotary kiln body 5; meanwhile, the liquid after heat exchange in the heat exchange cavity can gradually cool down, and the cooled water can rise to the overflow port of the second baffle 99 and enter the water storage cavity for reuse, and by installing the heat recovery tray 9, the entire device can fully recover and utilize the high temperature generated by the sintering of the rotary kiln body 5, and simultaneously achieve the effects of fume treatment, material cooling and prevention of material agglomeration, so as to save energy consumption;

[0028] As shown in [Fig. 1], in this embodiment, the number of towing mechanisms 3 is not less than two; the drive mechanism 4 is located between the towing mechanisms 3; an outer side of the rotary kiln body 5 is provided with a limiting ring and a gear ring which are connected to the towing mechanism 3 and the drive mechanism 4; the towing mechanism 3 and the drive mechanism 4 can drive the rotary kiln body 5 in stable rotation, both of which belong to conventional technology and are not described here;

[0029] As shown in [Fig.3], in this embodiment, an exhaust port 61 is arranged on one side, near the rotary kiln body 5, of the second material guide end 6, and a feed port 63 is arranged on one side, near the kiln head tray 7, of the second material guide end 6, both sides of the second material guide end 6 between the exhaust port 61 and the feed port 63 are provided with air guide threads 64, and the outer side, inside the kiln head tray 7, of the air guide thread 64 is provided with a gas collection cover 71;the gas collection cover 71 is in communication with the gas injection pipe 94, so that the inert gas flowing in the gas injection pipe 94 can be injected into the internal cavity of the second material guide end 6 through the gas collection cover 71 and enter the interior of the rotary kiln body 5; a feed wheel 62 is arranged to rotate in the internal cavity of the second material guide end 6, and a drive piece used to drive the feed wheel 62 to rotate is arranged in the kiln head tray 7, a space is arranged between the wheels of the feed wheel 62 to transport the lithium battery material to be processed;after the lithium battery material to be processed is injected into the second end of the material guide 6 through the feeding mechanism 77, it can remain in the space between the blades of the feeding wheel 62, the operation of the drive part in the furnace head tray 7 can drive the feeding wheel 62 into rotation, and the lithium battery material to be processed is pushed from one end of the feeding orifice 63 to one end of the discharge orifice 61 and injected into the internal cavity of the rotary furnace body 5;By installing the gas collection cover 71 and the air guide net 64, nitrogen, after heating, can be injected into the internal part of the second material guide end 6 and continuously wash the lithium battery material to be processed. The lithium battery material transported in the second material guide end 6 is completely dispersed, and the lithium battery material is preheated and dried beforehand. This effectively prevents the agglomeration of the lithium battery material during sintering in the internal cavity of the rotary kiln body 5, avoids combustion or sintering of the battery material, and ensures uniformity of the material sintering.

[0030] In this embodiment, the drive piece is located in the furnace head tray 7 above the support plate 76. The drive piece comprises a first gear 72, a motor 73, and a second gear 74. The motor 73 is fixed to the top inside the furnace head tray 7. The first gear 72 is arranged in rotation on the output shaft of the motor 73; one end of the rotating shaft of the feed wheel 62 is inserted inside the furnace head tray 7, the second gear 74 is fixed on the rotating shaft of the feed wheel 62 and meshed with the first gear 72, so that when the motor 73 drives the first gear 72 in rotation, the second gear 74 can be engaged to drive the feed wheel 62 in rotation synchronously; the first gear 72, the motor 73 and the second gear 74 constitute a drive piece, the motor 73 can drive the first gear 72 in rotation and engage the second gear 74 to drive the feed wheel 62 in rotation synchronously, and the lithium battery material to be processed is transported stably inside the second end of the material guide 6 by the rotation of the feed wheel 62;In this embodiment, the rotating shaft of the feed wheel 62 is a hollow shaft; the thermal conduction pipe of the burner 75 is inserted into the internal cavity of the rotary kiln body 5 through the hollow shaft of the feed wheel 62; the specially shaped rotating shaft of the feed wheel 62 cannot affect its rotation, nor affect the thermal conduction of the burner 75, thus ensuring that the feed wheel 62 and the burner 75 can be used independently.

[0031] In summary, in the lithium battery rotary kiln with heat recovery mechanism provided according to the present application, the two ends of the rotary kiln body 5 are respectively provided with a first material guide end 2 and a second material guide end 6, and a cooling tray 8 and a heat recovery tray 9 in communication with each other are provided under the rotary kiln body 5, so that the high-temperature fumes produced by the rotary kiln body 5 can be introduced into the dust-removal cavity of the heat recovery tray 9 through the air duct 22, cooling water is sprayed through the second spray seat 95 into the dust-removal cavity to cool and remove dust from the fumes, and after the impurities in the fumes are filtered through the filter 96, the clean gas is discharged,thus reducing the environmental impact; the exchanged hot water can heat the inert gas (nitrogen) circulating in the second heat exchange coil 98, so that the nitrogen is heated and then introduced into the gas collection cover 71 of the furnace head tray 7 through the gas injection pipe 94, the inert gas can impact the lithium battery material transported inside the second material guide end 6, dispersing the lithium battery material and pre-drying it, which not only reduces over-combustion or pinching of the lithium battery materials during sintering due to agglomeration, but ensures uniformity of material sintering and improves the temperature. The battery material temperature is preheated, thus shortening the sintering time and improving the sintering speed; and after the sintered lithium battery material is introduced into the cooling tank 8 from the first end of the material guide 2, the heat on the material surface in the first heat exchange coil 84 can be removed by cold water sprayed through the spray pipe 83, which can not only reduce the material temperature but also remove heat from the materials with cold water to raise the temperature of the cold water, so that the heated water can be introduced into the thermal energy recovery tank 9 through the water return pipe 85, and after being mixed with the hot water in the dust removal cavity,Heated water enters the heat exchange cavity to perform secondary heat exchange on the inert gas circulating in the second heat exchange coil 98, which allows for the complete recycling of heat in the fumes and sintered materials, reducing resource waste, and enabling fume treatment, material cooling, and the prevention of material agglomeration, thereby saving energy consumption and facilitating collaborative work between components.

[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. Moreover, 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 exemplary and shall not be construed as a limitation of this disclosure. A person skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of this disclosure.

Claims

1. Demands lithium battery rotary kiln with heat recovery mechanism, comprising a kiln tail tray (1), a towing mechanism (3), a drive mechanism (4), a rotary kiln body (5) and a kiln head tray (7); wherein the kiln tail tray (1) and the kiln head tray (7) are respectively arranged at the two ends of the rotary kiln body (5); the towing mechanism (3) and the drive mechanism (4) are both arranged under the rotary kiln body (5) and connected to the rotary kiln body (5) to drive the rotary kiln body (5) into rotation;one end, near the furnace tail tray (1), of the rotary furnace body (5) is provided with a first material guide end (2), a cooling tray (8) is arranged under the first material guide end (2) and a material guide mechanism is arranged in the cooling tray (8), two ends of the material guide mechanism are respectively in communication with the first material guide end (2) and the furnace tail tray (1), a first heat exchange component penetrates vertically into the center of the material guide mechanism;a thermal energy recovery tank (9) is arranged under the towing mechanism (3) and the drive mechanism (4), a first baffle (97) and a second baffle (99) are arranged in the thermal energy recovery tank (9), so that the thermal energy recovery tank (9) is divided into a dust removal cavity, a heat exchange cavity and a water storage cavity by the first baffle (97) and the second baffle (99); a filter (96) is arranged under the first baffle (97), and an overflow hole is arranged on the second baffle (99);a dust collection and heat exchange component is arranged in the dust collection cavity, and a second heat exchange component is arranged in the heat exchange cavity; the dust collection cavity is connected to an internal cavity of the first material guide end (2) through an air duct (22); the dust collection cavity is connected to an internal cavity of the cooling tank (8) through a water return pipe (85); the water storage cavity is provided with a liquid extraction pump, and the water storage cavity is filled with coolant; a three-way pipe (91) is arranged outside the recovery tank;

2. of thermal energy (9), and three water outlets of the three-way pipe (91) are respectively connected to a first water inlet pipe (81), a second water inlet pipe (92) and a water injection pipe (93), the first water inlet pipe (81) is in communication with the first heat exchange component, and the second water inlet pipe (92) is in communication with the dust collection and heat exchange component, the water injection pipe (93) is in communication with the liquid extraction pump, the liquid extraction pump is configured to inject the coolant into the water storage cavity in the three-way pipe (91) through the water injection pipe (93), and conduct the coolant into the first heat exchange component and the dust collection and heat exchange component respectively through the three-way pipe (91),The coolant cools the materials falling into the first material guide end (2), and performs dust removal and heat exchange cooling on the high-temperature fumes in the first material guide end (2); one end of the second heat exchange assembly is connected to an inert gas pipe, and the other end of the second heat exchange assembly is connected to the internal cavity of the second material guide end (6) through an air injection pipe (94); the inert gas undergoes heat exchange through the second heat exchange assembly and is then injected into the rotary kiln body (5) through the second material guide end (6); a burner (75), a support plate (76), and a feed mechanism (77) are arranged in the kiln head tray (7).The support plate (76) is connected to an upper end of the internal cavity of the furnace head tray (7). The burner (75) is fixed above the support plate (76) to generate a high-temperature gas and inject the high-temperature gas into the rotary furnace body (5). The feed mechanism (77) is fixed to the side, near the second material guide end (6) of the support plate (76), and is used to transport the lithium battery materials to be processed into the rotary furnace body (5). A lithium battery rotary furnace with a heat recovery mechanism according to claim 1, wherein the number of towing mechanisms (3) is not less than two; wherein the drive mechanism (4) is located between the towing mechanisms (3); a,

3.

4. The outer side of the rotary kiln body (5) is provided with a limiting ring and a gear ring which are connected to the towing mechanism (3) and the drive mechanism (4). Lithium battery rotary kiln with heat recovery mechanism according to claim 1 or 2, wherein a discharge port (61) is arranged on one side, near the rotary kiln body (5), of the second material guide end (6), and a feed port (63) is arranged on one side, near the kiln head tray (7), of the second material guide end (6), both sides of the second material guide end (6) between the discharge port (61) and the feed port (63) are provided with air guide threads (64), and the outer side, inside the kiln head tray (7), of the air guide thread (64) is provided with a gas collection cover (71), the gas collection cover (71) is in communication with the gas injection pipe (94),so that the inert gas flowing in the gas injection pipe (94) is injected into the internal cavity of the second material guide end (6) through the gas collection cover (71) and enters the rotary kiln body (5); a feed wheel (62) is arranged to rotate in the internal cavity of the second material guide end (6), and a drive piece used to drive the feed wheel (62) in rotation is arranged in the kiln head tray (7); a space is arranged between the wheel blades of the feed wheel (62) to transport the lithium battery material to be processed. Lithium battery rotary oven with heat recovery mechanism according to claim 3, wherein the drive part is located in the oven head tray (7) above the support plate (76), the drive part comprises a first gear (72), a motor (73) and a second gear (74); wherein the motor (73) is fixed on top inside the oven head tray (7); the first gear (72) is arranged to rotate on an output shaft of the motor (73); One end of the rotating shaft of the feed wheel (62) is inserted into an interior of the furnace head tray (7). The second gear (74) is fixed to the rotating shaft of the feed wheel (62) and meshes with the first gear (72), so that when the motor (73) drives the first gear (72) in rotation, the second gear (74) is engaged to drive the feed wheel (62) in rotation in a synchronous manner.

5. Lithium battery rotary oven with heat recovery mechanism according to claim 4, wherein the rotating shaft of the feed wheel (62) is a hollow shaft, the thermal conduction pipe of the burner (75) is inserted into the internal cavity of the rotary oven body (5) through the hollow shaft of the feed wheel (62).

6. Lithium battery rotary kiln with heat recovery mechanism according to claim 1 or 2, wherein the material guidance mechanism comprises a collection hopper (82) and a first heat exchange coil (84), the first heat exchange coil (84) is arranged vertically in the internal cavity of the cooling tray (8), the collection hopper (82) is connected to an upper end of the first heat exchange coil (84), and a lower end of the first heat exchange coil (84) is connected to the kiln tail tray (1).

7. Lithium battery rotary kiln with heat recovery mechanism according to claim 6, wherein the bottom of the internal cavity of the first material guide end (2) is provided with a guide hopper (21), a bottom end of the guide hopper (21) is connected to a pipe, and the bottom end of the pipe fits into the material opening of the collection hopper (82).

8. Lithium battery rotary oven with heat recovery mechanism according to claim 6, wherein the first heat exchange component is a spray pipe (83), and the spray pipe (83) is uniformly provided with a plurality of spray heads, the upper end of the spray pipe (83) is in communication with the first water inlet pipe (81).

9. Lithium battery rotary oven with heat recovery mechanism according to claim 1 or 2, wherein the dust removal and heat exchange component is a spray seat (95), and the plurality of spray heads is uniformly arranged at the bottom of the spray seat (95), the spray seat (95) is in communication with the second water inlet pipe (92).

10. Lithium battery rotary oven with heat recovery mechanism according to claim 1 or 2, wherein the second heat exchange component is a second heat exchange coil (98), the second heat exchange coil (98) is arranged at the bottom of the heat exchange cavity, one end of the second heat exchange coil (98) is connected to the external inert gas pipe, and the other end of the second heat exchange coil (98) is connected to the gas injection pipe (94).

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