Lithium battery recycling low-temperature roasting device

Abstract

According to the technical scheme, the lithium battery recycling low-temperature roasting device comprises a roasting bin, a conveying assembly, a feeding and discharging assembly and a sealing assembly, and a feeding port and a discharging port are formed in the two ends of the roasting bin respectively; the conveying assembly is arranged in the roasting bin; the feeding and discharging assembly comprises a containing chamber and a vacuum chamber, the containing chamber is arranged at the top of the vacuum chamber, an opening is formed in the top of the containing chamber, and discharging openings are formed in the bottom of the containing chamber and the bottom of the vacuum chamber. According to the utility model, the feeding and discharging components are respectively arranged at the feeding hole and the discharging hole of the roasting bin, and are temporarily retained in the vacuum chamber before feeding and discharging so as to maintain a vacuum environment similar to that in the roasting chamber, and then are guided into the roasting bin, so that continuous feeding and discharging of battery fragments can be maintained, and a low-temperature roasting space is sealed; the heat is not easy to dissipate, and the extraction efficiency between the electrolyte and the battery fragments is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery recycling, in particular to a low-temperature roasting device for recycling lithium batteries. Background Art

[0002] Waste batteries contain a large amount of heavy metals and electrolyte solutions such as waste acid and waste alkali. The lithium salts, organic solvents and various additives contained in the electrolyte of waste lithium-ion batteries can be recycled. In order to solve the above problems, Chinese utility model patent 202122148880.5 proposes a low-temperature baking furnace, including a box body and a feeding funnel. The box body is sequentially arranged with several layers of conveying mechanisms arranged in a serpentine shape from top to bottom. The conveying directions of two adjacent conveying mechanisms are opposite, and the conveying end of the conveying mechanism on the bottom layer is connected with a discharge port; a heating and drying mechanism is respectively arranged above each layer of the conveying mechanism, and a powder collection mechanism is also arranged inside each layer of the conveying mechanism; a negative pressure suction mechanism is also arranged on the top of the box body. The electrolyte is decomposed and recycled by low-temperature baking.

[0003] The above-mentioned prior art also has the following disadvantages: the feed port and the discharge port need to be open for materials to enter and exit, which makes it difficult to form a vacuum condition, and the extraction efficiency between the electrolyte and the battery fragments is not high. In addition, heat loss is easily generated at the inlet and outlet, resulting in uneven temperature distribution. Therefore, how to maintain the feeding and discharging of battery fragments and seal the low-temperature baking space is a technical problem that needs to be solved. Utility Model Content

[0004] In view of this, it is necessary to provide a lithium battery recycling low-temperature roasting device to solve the technical problem of how to maintain the feeding and discharging of battery fragments and seal the low-temperature roasting space in the prior art.

[0005] In order to achieve the above technical objectives, the technical solution of the utility model provides a lithium battery recycling low-temperature roasting device, comprising:

[0006] A roasting bin, with a feed inlet and a discharge outlet at both ends;

[0007] A conveying assembly, which is arranged in the roasting bin;

[0008] A material inlet and outlet assembly, comprising a retardation chamber and a vacuum chamber, wherein the retardation chamber is arranged at the top of the vacuum chamber and has an open top, and the bottoms of the retardation chamber and the vacuum chamber are both provided with a discharge port, and two material inlet and outlet assemblies are respectively installed on the feed port and the discharge port, and a vacuum pump is arranged outside the vacuum chamber and the roasting chamber; and

[0009] The sealing components are arranged one by one on the discharge openings and are used for sealing the discharge openings.

[0010] Furthermore, one of the inlet and outlet components is installed on the inlet with the bottom of the vacuum chamber, and the other inlet and outlet component is installed on the outlet with the top of the retardation chamber.

[0011] Furthermore, it also includes a material blocking hopper, which is arranged at the bottom of the feed port and located at the top of the conveying component, and is used to guide the material to be concentrated on the conveying component.

[0012] Furthermore, the conveying component includes a conveyor belt.

[0013] Furthermore, the material blocking hopper includes a side plate and a front plate, the two side plates are connected to the inner wall of the roasting bin and are located on both sides of the conveyor belt, and the front plate is arranged between the two side plates away from the feed port, located directly above the conveyor belt, and forms a discharge gap between the conveyor belt and the front plate, so that the material is transported on the conveyor belt with uniform thickness.

[0014] Furthermore, guide plates are extended from opposite sides of the two side plates, and the guide plates are flatly attached to the top of the conveyor belt.

[0015] Furthermore, a heating component is provided inside the roasting bin, and the heating component includes an electric heating plate, which is provided on both side walls of the roasting bin and parallel to the conveyor belt.

[0016] Furthermore, the sealing component includes a hydraulic push rod and a sealing plate, the sealing plate is connected to the telescopic end of the hydraulic push rod, and the sealing plate has two position states: closing the discharge port and opening the discharge port.

[0017] Furthermore, the inner bottom walls of the stagnation chamber and the vacuum chamber are both inclined toward the corresponding feed opening.

[0018] Furthermore, a plurality of circular protrusions are arranged on the outer side of the conveyor belt in an array distribution.

[0019] Compared with the prior art, the utility model has the following beneficial effects: by respectively arranging an inlet and outlet assembly at the feed port and the discharge port of the roasting bin, the materials are temporarily retained in a vacuum chamber before feeding and discharging to maintain a vacuum environment similar to that in the roasting chamber, and then introduced into the roasting bin, which can not only maintain the continuous feeding and discharging of battery fragments, but also seal the low-temperature roasting space, making it difficult for heat to dissipate, and improving the extraction efficiency between the electrolyte and the battery fragments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the structure of the low-temperature roasting device for recycling lithium batteries according to an embodiment of the utility model;

[0021] Figure 2It is a cross-sectional view of a lithium battery recycling low-temperature roasting device according to an embodiment of the utility model;

[0022] Figure 3 It is a three-dimensional partial cutaway view of a roasting bin according to an embodiment of the utility model;

[0023] In the figure: 1, roasting bin; 101, feed inlet; 102, discharge outlet;

[0024] 2. conveying assembly; 201, round convex;

[0025] 3. Inlet and outlet assembly; 31. Delay chamber; 32. Vacuum chamber; 301. Feeding port;

[0026] 4. Sealed component; 41. Hydraulic push rod; 42. Sealing plate;

[0027] 5. Vacuum pump;

[0028] 6. Bucket stopper; 61. Side plate; 62. Front plate; 601. Discharging gap; 602. Guide plate;

[0029] 7. Heating component. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0031] like Figure 1-3As shown, the utility model provides a lithium battery recycling low-temperature roasting device, including a roasting bin 1, a conveying assembly 2, a material inlet and outlet assembly 3 and a sealing assembly 4, the roasting bin 1 is provided with a feed port 101 and a material outlet 102 at both ends thereof, the feed port 101 is located at the top of the roasting bin 1, and the material outlet 102 is located at the bottom of the roasting bin 1; the conveying assembly 2 is arranged in the roasting bin 1, and is used to transport the material from the feed port 101 to the material outlet 102; the material inlet and outlet assembly 3 includes a retardation chamber 31 and a vacuum chamber 32, and the retardation chamber 31 is arranged in the vacuum chamber 32 The top of the retardation chamber 31 and the vacuum chamber 32 are open at the bottom, and a discharge port 301 is provided. The two inlet and outlet components 3 are respectively installed on the inlet 101 and the discharge port 102. The vacuum chamber 32 and the roasting bin 1 are both provided with a vacuum pump 5, and the vacuum chamber 32 and the roasting bin 1 can be evacuated by the vacuum pump 5; the sealing components 4 are arranged on the discharge port 301 in a one-to-one correspondence, and are used for sealing the discharge port 301. The inlet and outlet components 3 at one end of the inlet 101 are first The battery fragments are stored in the retardation chamber 31, and then the sealed component 4 is opened to connect the retardation chamber 31 with the vacuum chamber 32, so that the battery fragments fall into the vacuum chamber 32, and then the sealed component 4 is closed, and the vacuum pump 5 is used to evacuate the vacuum chamber 32. The sealed component 4 below the vacuum chamber 32 is opened, and the vacuum chamber 32 is connected with the roasting chamber 1, so that the battery fragments slide from the feed port 101 to the conveying component 2 for conveying, and are low-temperature roasted in the roasting chamber 1 to decompose the electrolyte on the battery fragments. In the above feeding method, the feed and discharge ports of the roasting chamber 1 are always in a closed environment with it to avoid This avoids the influence of the temperature inside the chamber in the open state, improves the internal vacuum degree, promotes the separation of the electrolyte from the battery after decomposition, and improves the decomposition efficiency of the electrolyte. Similarly, at the discharge port 102, the vacuum chamber 32 is first evacuated by the vacuum pump 5, and the stagnation chamber 31 stores the battery fragments after roasting. Then, the sealed component 4 is opened to connect the stagnation chamber 31 with the vacuum chamber 32, so that the battery fragments fall into the vacuum chamber 32, and then the sealed component 4 is closed, and then the sealed component 4 below the vacuum chamber 32 is opened, and the discharge port 301 at the bottom of the vacuum chamber 32 is opened for discharge.

[0032] Specifically, one of the inlet and outlet components 3 is installed on the inlet 101 with the bottom of the vacuum chamber 32 , and the other inlet and outlet component 3 is installed on the outlet 102 with the top of the retardation chamber 31 .

[0033] In this embodiment, in order to gather the battery fragments in the roasting bin 1 and guide them to move to the conveying component 2, the lithium battery recycling low-temperature roasting device also includes a material blocking hopper 6, which is arranged at the bottom of the feed port 101 and located at the top of the conveying component 2, and is used to guide the material to concentrate on the conveying component 2, surround the material, and make it gather on the conveying component 2 to prevent it from falling off.

[0034] Specifically, the conveying component 2 includes a conveyor belt.

[0035] In this embodiment, in order to control the conveying thickness of the battery fragments so as to spread the battery fragments flat, the blocking hopper 6 includes a side plate 61 and a front plate 62. The right sides of the two side plates 61 are connected to the right side wall of the roasting bin 1 and are located on both sides of the conveyor belt to prevent the battery fragments from falling off from both sides. The front plate 62 is arranged between the two sides of the side plates 61 away from the feed port 101, that is, the left side of the side plate 61. The front plate 62 is located directly above the conveyor belt and forms a discharge gap 601 with the conveyor belt to provide materials with uniform thickness for conveying on the conveyor belt. During the conveying of the conveyor belt, the battery fragments will be driven to pass through the discharge gap 601, so that the maximum thickness of the battery fragments can be controlled by the discharge gap 601, thereby achieving the effect of spreading them flat.

[0036] It is understandable that stirring rods can be provided at both the discharge gap 601 and the discharge port 301 for stirring to avoid blockage.

[0037] In this embodiment, in order to seal the gap between the side plate 61 and the conveyor belt, guide plates 602 are extended on the opposite sides of the two side plates 61. The guide plates 602 are flat against the top of the conveyor belt, thereby blocking the top of the gap and preventing battery fragments from getting stuck in the gap.

[0038] In this embodiment, a heating assembly 7 is disposed inside the roasting bin 1 . The heating assembly 7 includes an electric heating plate, which is disposed on both side walls of the roasting bin 1 and is parallel to the conveyor belt.

[0039] It is understandable that the heating component 7 can also use an electric heating wire, or a pipe for the heat medium to enter and exit, which can heat the inside of the roasting chamber 1 and maintain the effect of low-temperature roasting.

[0040] It should be noted that the temperature control of the electric heating plate can be carried out by conventional operating means in the art, and the heating power can be controlled by using a temperature sensor and a temperature controller. This is a prior art and will not be described in detail here.

[0041] In this embodiment, in order to perform sealing control on the discharge port 301, the sealing component 4 includes a hydraulic push rod 41 and a sealing plate 42. The sealing plate 42 is connected to the telescopic end of the hydraulic push rod 41, and the sealing plate 42 has two position states: closing the discharge port 301 and opening the discharge port 301. Through the extension and retraction of the hydraulic push rod 41, when it pushes the sealing plate 42 to the bottom of the discharge port 301, the discharge port 301 is blocked to form a seal. When the sealing plate 42 shrinks and leaves from the bottom of the discharge port 301, it forms an opening.

[0042] It is understandable that the sealing component 4 may also adopt a flap-type sealing structure to achieve a sealing effect.

[0043] In this embodiment, in order to facilitate material discharge when opening the sealed component 4, the inner bottom walls of the stagnation chamber 31 and the vacuum chamber 32 are both inclined toward the corresponding discharge port 301, and the battery fragments are guided to slide down through the inclined surface.

[0044] It is understandable that the battery fragments can also be pushed down by a telescopic push rod.

[0045] In this embodiment, in order to improve the drying efficiency, a plurality of round protrusions 201 are arranged in an array on the outside of the conveyor belt to form a gap between the bottom of the battery fragments and the conveyor belt, thereby increasing the heating area of ​​the battery fragments and allowing the electrolyte decomposed by low-temperature baking to separate, thereby improving the drying efficiency.

[0046] The specific working process of the utility model is as follows: the battery fragments are fed into the retardation chamber 31 above the feed port 101, the discharge port 301 thereunder is opened, the battery fragments are introduced into the vacuum chamber 32, which is then sealed with a sealing plate 42, and vacuumized with a vacuum pump 5. At the same time, the battery fragments are continued to be fed into the retardation chamber 31. After vacuumizing, the discharge port 301 thereunder is opened, the battery fragments are fed into the blocking hopper 6, and are transported toward the discharge port 102 by the conveying component 2, and low-temperature roasted in the roasting bin 1; similarly, at the discharge port 102, the battery fragments conveyed by the conveying component 2 fall into the retardation chamber 31 at this position, and before opening the discharge port 301 thereunder, the vacuum chamber 32 thereunder is vacuumized with a vacuum pump 5, and then the discharge port 301 is opened to introduce the battery fragments, which is then closed with a sealing plate 42, and finally the discharge port 301 below the vacuum chamber 32 is opened for discharge.

[0047] The entire workflow is completed, and the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A lithium battery recycling low temperature roasting device, characterized in that: include: A roasting bin, with a feed inlet and a discharge outlet at both ends; A conveying assembly, which is arranged in the roasting bin; A material inlet and outlet assembly, comprising a retardation chamber and a vacuum chamber, wherein the retardation chamber is arranged at the top of the vacuum chamber and has an open top, and the bottoms of the retardation chamber and the vacuum chamber are both provided with a discharge port, and two material inlet and outlet assemblies are respectively installed on the feed port and the discharge port, and a vacuum pump is arranged outside the vacuum chamber and the roasting chamber; and The sealing components are arranged one by one on the discharge openings and are used for sealing the discharge openings.

2. The lithium battery recycling low-temperature roasting device according to claim 1, characterized in that: One of the inlet and outlet components is installed on the inlet with the bottom of the vacuum chamber, and the other inlet and outlet component is installed on the outlet with the top of the retardation chamber.

3. The lithium battery recycling low-temperature roasting device according to claim 2, characterized in that: It also includes a material blocking hopper, which is arranged at the bottom of the feed inlet and located at the top of the conveying component, and is used to guide the materials to be concentrated on the conveying component.

4. The lithium battery recycling low-temperature roasting device according to claim 3, characterized in that: The transport assembly includes a conveyor belt.

5. The lithium battery recycling low-temperature roasting device according to claim 4, characterized in that: The material blocking hopper includes a side plate and a front plate, the two side plates are connected to the inner wall of the roasting bin and are located on both sides of the conveyor belt, and the front plate is arranged between the two side plates on the side away from the feed port, located directly above the conveyor belt, and forms a discharge gap between the front plate and the conveyor belt, so that the material is transported on the conveyor belt with uniform thickness.

6. The lithium battery recycling low-temperature roasting device according to claim 5, characterized in that: A guide plate is extended from one side opposite to the other side of the two side plates, and the guide plate is flatly attached to the top of the conveyor belt.

7. The lithium battery recycling low-temperature roasting device according to claim 6, characterized in that: A heating component is arranged inside the roasting bin, and the heating component comprises an electric heating plate, which is arranged on both side walls of the roasting bin and parallel to the conveyor belt.

8. The lithium battery recycling low-temperature roasting device according to claim 7, characterized in that: The sealing component includes a hydraulic push rod and a sealing plate, wherein the sealing plate is connected to the telescopic end of the hydraulic push rod, and the sealing plate has two position states: sealing the discharge port and opening the discharge port.

9. The lithium battery recycling low-temperature roasting device according to claim 8, characterized in that: The inner bottom walls of the stagnation chamber and the vacuum chamber are both in the shape of an inclined surface facing the corresponding feed opening.

10. The lithium battery recycling low-temperature roasting device according to claim 9, characterized in that: The outer side of the conveyor belt is provided with a plurality of circular protrusions distributed in an array.

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