Staged temperature control system for lithium battery carbonization furnace

Abstract

The staged temperature control system for the lithium battery carbonization furnace comprises a temperature control cover and the carbonization furnace, the carbonization furnace penetrates through the temperature control cover, and the carbonization furnace is in sealing contact with the temperature control cover; a heat exchange cavity is formed between the outer wall of the carbonization furnace and the inner wall of the temperature control cover, and the heat exchange cavity is provided with a first heat exchange sub-cavity, a second heat exchange sub-cavity and a third heat exchange sub-cavity which are sequentially communicated in the conveying direction of materials in the carbonization furnace; the first heat exchange sub-cavity, the second heat exchange sub-cavity and the third heat exchange sub-cavity are each provided with a temperature adjusting mechanism, and the temperature in the carbonization furnace corresponding to the second heat exchange sub-cavity is the highest. The temperature of the carbonization furnace is controlled in a zoning mode, so that the temperature in the carbonization furnace is low at the two ends and high in the middle, control over the temperatures of different zones of the carbonization furnace is achieved through different heat exchange amounts of the temperature adjusting mechanism and the carbonization furnace, then metal materials in crushed materials are not oxidized, but black powder on the surfaces of the metal materials falls off, and the materials are crushed. And the recovery rate of metal materials is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the battery recycling technical field, concretely relates to a kind of staged temperature control system for lithium battery carbonization furnace. BACKGROUND

[0002] Lithium battery is a kind of disposable battery with lithium metal or lithium alloy as negative electrode material, using non-aqueous electrolyte solution. Under the drive of the high-speed growth of electric vehicle production, China's lithium battery industry continues to maintain rapid growth trend, and the recycling research of the obsolete lithium battery brought by this becomes an urgent problem to be solved. In the recycling process of obsolete lithium ion battery pack, due to the diversity of structure and size of recycled lithium battery, manual participation is high. There are two kinds of conventional processing methods at present: one is to take out pole roll from battery shell, and black powder is obtained by crushing and separating after manual disassembly and separation of positive and negative pole pieces, but the method makes electrolyte on positive and negative pole pieces easy to volatilize into air, which will cause harm to human body and environment;Another way is to directly crush and separate the pole roll to obtain black powder, but the black powder obtained by the method has high impurity content, which increases the cost of impurity removal in subsequent hydrometallurgy, and is not very friendly to environment. SUMMARY

[0003] In view of the deficiencies described in the above prior art, the utility model provides a kind of staged temperature control system for lithium battery carbonization furnace.

[0004] The technical scheme adopted by the utility model is:

[0005] The utility model provides a kind of lithium battery carbonization furnace with staged temperature control system, including temperature control cover and carbonization furnace, carbonization furnace is arranged through temperature control cover, and carbonization furnace is sealed contact with temperature control cover;Heat exchange cavity is formed between carbonization furnace outer wall and temperature control cover inner wall, along the material conveying direction in carbonization furnace, the heat exchange cavity has sequentially through first heat exchange sub-cavity, second heat exchange sub-cavity and third heat exchange sub-cavity;First heat exchange sub-cavity is close to the feed inlet of carbonization furnace;Third heat exchange sub-cavity is close to the discharge port of carbonization furnace;First heat exchange sub-cavity, second heat exchange sub-cavity and third heat exchange sub-cavity are all provided with temperature regulating mechanism, and the temperature of the carbonization furnace corresponding to second heat exchange sub-cavity is highest.Carbonization furnace burns and rotates and conveys battery broken material, and the temperature of carbonization furnace is controlled in different regions, each heat exchange sub-cavity reduces the temperature in carbonization furnace by heat exchange with carbonization furnace, so that the temperature of carbonization furnace is lower in the area close to feed inlet in temperature control cover, i.e.

[0006] As a preferred scheme of the utility model, the temperature regulating mechanism includes air cooling structure and water cooling structure, the air cooling structure and the water cooling structure corresponding to the first heat exchange sub-cavity have more cold air and cold water than the air cooling structure and the water cooling structure corresponding to the second heat exchange sub-cavity, and the air cooling structure and the water cooling structure corresponding to the third heat exchange sub-cavity have the most cold air and cold water; because the battery broken material at the first heat exchange sub-cavity is in the initial stage of combustion, the temperature is not particularly high, and the temperature in the carbonization furnace increases with sufficient combustion during conveying, the amount of heat exchange is controlled by the cold air and cold water entering the second heat exchange sub-cavity, so the cold air and cold water need to be adjusted to reduce the temperature before the discharge of the carbonization furnace. The temperature difference with the carbonization furnace is adjusted by controlling the amount of cold air and cold water, and then the temperature of different regions of the carbonization furnace is controlled.

[0007] As a preferred scheme of the utility model, the air cooling structure includes a fan, an air inlet channel, an air inlet and an air outlet; the air outlet of the fan is communicated with the air inlet channel, and an air cooling electromagnetic valve is arranged on the air inlet channel; the air inlet channel is communicated with the air inlet, and the air inlet is arranged at the lower part of the temperature control cover; the air outlet is arranged at the top of the temperature control cover; the air inlet channel, the air inlet, the temperature-adjustable heat exchange sub-cavity and the air outlet form an air cooling cooling channel. The fan sends cold air from the air inlet channel into the temperature control cover, the cold air exchanges heat with the carbonization furnace from bottom to top, reduces the temperature of the carbonization furnace, and the air after heat exchange is discharged from the air outlet.

[0008] As a preferred scheme of the utility model, the air inlet channel is provided with a spoiler. The air inlet channel uses a triangular channel, the channel is wider closer to the air inlet, and the spoiler is arranged to divide the incoming cold air and make it enter the corresponding heat exchange sub-cavity uniformly, and the cold air between adjacent heat exchange sub-cavities can have an overlapping area.

[0009] As a preferred scheme of the utility model, the water cooling structure comprises a main water pipe, a branch water pipe, a spray head and an electromagnetic valve, one main water pipe is arranged on each side of the temperature control cover corresponding to the heat exchange cavity, a plurality of branch water pipes are communicated with the main water pipe, one spray head is arranged on each branch water pipe, the spray head is inserted into the temperature control cover, an electromagnetic valve is arranged between the branch water pipe and the spray head, and a collection drainage port is arranged at the bottom of the temperature control cover. Cold water is introduced into the main water pipe and the branch water pipes, the amount of water sprayed by the spray head is controlled through the electromagnetic valve, the sprayed water exchanges heat with the carbonization furnace from multiple angles in a ring shape, and the water after heat exchange is discharged from the collection drainage port.

[0010] As a preferred scheme of the utility model, the water cooling structures on the same side of the heat exchange cavity share one main water pipe, and a small amount of water is used to reduce high temperature to achieve energy saving and temperature control.

[0011] As a preferred scheme of the utility model, the bottom of the temperature control cover is inclined along the material conveying direction of the carbonization furnace, the collection drainage port is communicated with a drainage pipeline, the drainage pipeline is connected to the water inlet of a water tank, the water outlet of the water tank is communicated with the water inlet of a water pump, and the water outlet of the water pump is communicated with the two main water pipes through a three-way pipe. In order to facilitate the discharge of the water after heat exchange, the bottom of the temperature control cover is inclined, so that the water after heat exchange flows towards the collection drainage port and flows out of the collection drainage port, and the water tank and the water pump are arranged to recycle the cooling water.

[0012] As a preferred scheme of the utility model, a plurality of temperature sensors are arranged in the carbonization furnace, and at least one temperature sensor is arranged in the part of the carbonization furnace corresponding to each heat exchange sub-cavity. The temperature sensor can be an infrared sensor, the cold air valve and the cold water valve are adjusted according to the detected temperature to change the amount of cold air and cold water introduced into each heat exchange sub-cavity, so as to adjust the temperature of different regions of the carbonization furnace, and the temperature of the carbonization furnace gradually reaches the controllable required temperature along the material conveying direction.

[0013] As a preferred scheme of the utility model, each temperature sensor is connected with a controller, the controller is connected with the electromagnetic valves of each water cooling structure, and the controller is connected with each fan and each air cooling electromagnetic valve. The controller controls the corresponding electromagnetic valve and air cooling electromagnetic valve according to the detected temperature, so as to control the water spraying amount of each spray head and the cold air input amount of each fan.

[0014] The utility model discloses a wind cooling structure and water cooling structure and corresponding carbonization furnace part's heat exchange amount control, realize the phased control of carbonization furnace different area temperature, make carbonization furnace temperature from low to high again to bottom trapezoidal change, make the combustion of battery scrap in a carbonization furnace conveying process to be different temperature, remove the large amount of organic matter in battery scrap, reduce VOC emission pollutant, and reduce the oxidation rate of metal material, make metal material not oxidize, promote the recyclability of metal material. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will to the embodiment or prior art description needed to use the drawing make a simple introduction, obviously, below description's drawing only some embodiments of the utility model, for the ordinary skilled person in the art comes, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0016] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.

[0017] Figure 2 It is the front view of the utility model.

[0018] Figure 3 It is the rear view of the utility model.

[0019] Figure 4 It is the left view of the utility model.

[0020] Figure 5 It is the right view of the utility model.

[0021] Figure 6 It is the top view of the utility model. DETAILED DESCRIPTION

[0022] Below will combine the drawing in the embodiment of the utility model, the technical scheme in the embodiment of the utility model is clearly and completely described, obviously, the described embodiment only is a part of the embodiment of the utility model, instead of all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skilled person in the art without paying creative labor belong to the scope of the utility model protection.

[0023] Embodiment:

[0024] A kind of lithium battery carbonization furnace is used to stage temperature control system, such as Figures 1-6As shown, including temperature control cover 1 and carbonization furnace 2, carbonization furnace 2 is arranged through the temperature control cover 1 and can rotate relative to the temperature control cover, and the carbonization furnace and the temperature control cover contact place is provided with bearing and bearing seal; carbonization furnace 2 outer wall and temperature control cover 1 inner wall between the heat exchange cavity, the heat exchange cavity includes first heat exchange sub-cavity, second heat exchange sub-cavity and third heat exchange sub-cavity, along the carbonization furnace 2 inner material conveying direction, first heat exchange sub-cavity, second heat exchange sub-cavity and third heat exchange sub-cavity in turn through, is an integral structure, only because of the temperature difference is divided.

[0025] The first heat exchange sub-cavity is close to the feed inlet of the carbonization furnace; the third heat exchange sub-cavity is close to the discharge port of the carbonization furnace; the first heat exchange sub-cavity, the second heat exchange sub-cavity and the third heat exchange sub-cavity are provided with a temperature adjusting mechanism, the temperature adjusting mechanism comprises a fan 4, an air inlet channel 5, an air inlet and an air outlet 7; the outlet of the fan 4 is communicated with the air inlet channel 5, the air inlet channel 5 is provided with an air cooling electromagnetic valve, the air inlet channel 5 is provided with a spoiler 8, the air inlet channel 5 is communicated with the air inlet, and the air inlet is arranged at the lower part of the temperature control cover 1; the air outlet 7 is arranged at the top of the temperature control cover 1; the air inlet channel 5, the air inlet, the heat exchange cavity and the air outlet form an air cooling cooling channel. The air inlet channel uses a triangular channel, the closer to the air inlet channel, the wider, the spoiler is arranged to divide the incoming cold air and make it enter the heat exchange sub-cavity uniformly, and the cold air between adjacent heat exchange sub-cavities can have an overlapping area. The fan sends the cold air from the air inlet channel into the temperature control cover, the cold air exchanges heat with the carbonization furnace from bottom to top, reduces the temperature of the carbonization furnace, and the air after heat exchange is discharged from the air outlet.

[0026] The water cooling structure comprises a main water pipe 9, a branch water pipe 10, a spray head and an electromagnetic valve; one main water pipe 9 is arranged on each side of the temperature control cover 1 corresponding to the heat exchange cavity, a plurality of branch water pipes 10 are communicated on the main water pipe 9, the upper side and the lower side of the main water pipe are provided with branch water pipes, one spray head is arranged on each branch water pipe 10, and the spray head is inserted into the temperature control cover; an electromagnetic valve is arranged between the branch water pipe 10 and the spray head; and a collection drain port is arranged at the bottom of the temperature control cover.

[0027] Cold water is introduced into the main water pipe and each branch water pipe, the amount of water sprayed by the spray head is controlled through the electromagnetic valve, the sprayed water exchanges heat with the carbonization furnace from multiple angles in a ring shape, and the water after heat exchange is discharged from the collection drain port.

[0028] In order to simplify the water pipe and reduce the high temperature by using a small amount of water to achieve energy saving and temperature control, the water cooling structures on the same side of each heat exchange sub-cavity share one main water pipe.

[0029] In order to facilitate drainage, the bottom of the temperature control cover is inclined along the material conveying direction of the carbonization furnace, so that the water after heat exchange flows out towards the collection and drainage port, the collection and drainage port is communicated with a drainage pipeline 12, the drainage pipeline 12 is connected to the water inlet of a water tank 13, the water outlet of the water tank 13 is communicated with the water inlet of a water pump 14, and the water outlet of the water pump 14 is communicated with two main water pipes through a three-way pipe. The water pump 14 conveys the cooling water from the water tank to the two main water pipes, and then disperses to each branch pipe to wait for spraying. The sprayed water returns to the water tank from the drainage pipeline after heat exchange, and the arrangement of the water tank and the water pump enables the cooling water to be recycled.

[0030] In order to better control the temperature in the carbonization furnace in stages, a plurality of temperature sensors are installed in the carbonization furnace, and at least one temperature sensor is arranged in the part of the carbonization furnace corresponding to each of the first heat exchange sub-cavity, the second heat exchange sub-cavity and the third heat exchange sub-cavity. The temperature sensor can be an infrared sensor, and the amount of cold air and cold water introduced into each heat exchange sub-cavity is adjusted according to the detected temperature, so as to adjust the temperature in different regions of the carbonization furnace, so that the temperature of the carbonization furnace along the material conveying direction is low first and then high and then low again. Specifically, each temperature sensor is connected with a controller, the controller is connected with electromagnetic valves of each water cooling structure, and the controller is connected with each fan and each air cooling electromagnetic valve. The controller controls the corresponding fan to start and the corresponding electromagnetic valve and air cooling electromagnetic valve according to the detected temperature, so as to control the amount of water sprayed by each nozzle and the amount of cold air input.

[0031] The battery broken material in the carbonization furnace is combusted and conveyed in rotation, and the temperature in the carbonization furnace is controlled in zones. Each heat exchange sub-cavity reduces the temperature in the carbonization furnace through heat exchange with the carbonization furnace, so that the temperature in the region of the carbonization furnace close to the material inlet in the temperature control cover is low, i.e. the temperature in the carbonization furnace corresponding to the first heat exchange sub-cavity is low. The temperature in the carbonization furnace gradually increases along the material conveying direction, i.e. the temperature in the carbonization furnace corresponding to the second heat exchange sub-cavity is the highest. The temperature decreases close to the material outlet of the carbonization furnace, i.e. the temperature in the carbonization furnace corresponding to the third heat exchange sub-cavity is low. The temperature in the carbonization furnace presents a situation of low at both ends and high in the middle. The temperature control mechanism and the different heat exchange amounts of the carbonization furnace realize the control of the temperature in different regions of the carbonization furnace, so as to realize that the metal material in the broken material is not oxidized, but the black powder on the surface of the metal material falls off, and the recyclability of the metal material is improved.

[0032] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer 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.

[0033] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A staged temperature control system for a lithium battery carbonization furnace, comprising an adjustable temperature control hood (1) and a carbonization furnace (2), wherein the carbonization furnace (2) is disposed through the temperature control hood (1) and the carbonization furnace is in sealed contact with the temperature control hood; a heat exchange cavity is formed between the outer wall of the carbonization furnace (2) and the inner wall of the temperature control hood (1), characterized in that: Along the material conveying direction inside the carbonization furnace (2), the heat exchange chamber has a first heat exchange sub-chamber, a second heat exchange sub-chamber, and a third heat exchange sub-chamber that are connected in sequence; the first heat exchange sub-chamber is close to the feed inlet of the carbonization furnace; the third heat exchange sub-chamber is close to the discharge outlet of the carbonization furnace; temperature control mechanisms are provided at the first heat exchange sub-chamber, the second heat exchange sub-chamber, and the third heat exchange sub-chamber, and the temperature inside the carbonization furnace corresponding to the second heat exchange sub-chamber is the highest.

2. The staged temperature control system for a lithium battery carbonization furnace according to claim 1, characterized in that: The temperature control mechanism includes an air-cooled structure and a water-cooled structure.

3. The staged temperature control system for a lithium battery carbonization furnace according to claim 2, characterized in that: The air-cooled structure includes a fan (4), an air inlet channel (5), an air inlet, and an air outlet (7); the air outlet of the fan (4) is connected to the air inlet channel (5), and an air-cooled solenoid valve is provided on the air inlet channel (5); the air inlet channel (5) is connected to the air inlet, and the air inlet is located at the lower part of the temperature control cover (1); the air outlet (7) is located at the top of the temperature control cover (1); the air inlet channel (5), the air inlet, the heat exchange chamber, and the air outlet form an air-cooled cooling channel.

4. The staged temperature control system for a lithium battery carbonization furnace according to claim 3, characterized in that: A baffle (8) is provided inside the air intake channel (5).

5. The staged temperature control system for a lithium battery carbonization furnace according to any one of claims 2-4, characterized in that: The water-cooling structure includes a main water pipe (9), a branch water pipe (10), a nozzle, and a solenoid valve. A main water pipe (9) is provided on both sides of the temperature control cover (1) and the heat exchange chamber. Several branch water pipes (10) are connected to the main water pipe (9). A nozzle is provided on each branch water pipe (10), and the nozzle is inserted into the temperature control cover. A solenoid valve is provided between the branch water pipe (10) and the nozzle. A drainage collection port is provided at the bottom of the temperature control cover.

6. The staged temperature control system for a lithium battery carbonization furnace according to claim 5, characterized in that: The water-cooled structures located on the same side of the heat exchange chamber share a main water pipe.

7. The staged temperature control system for a lithium battery carbonization furnace according to claim 6, characterized in that: The bottom of the temperature control cover is inclined along the material conveying direction of the carbonization furnace. The collection drain is connected to the drain pipe (12). The drain pipe (12) is connected to the water inlet of the water tank (13). The water outlet of the water tank (13) is connected to the water inlet of the water pump (14). The water outlet of the water pump (14) is connected to the two main water pipes through a three-way pipe.

8. The staged temperature control system for a lithium battery carbonization furnace according to claim 7, characterized in that: Several temperature sensors are installed inside the carbonization furnace.

9. The staged temperature control system for a lithium battery carbonization furnace according to claim 8, characterized in that: Each temperature sensor is connected to the controller, the controller is connected to the solenoid valves of each water-cooled structure, and the controller is connected to each fan and each air-cooled solenoid valve.

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