Pyrolysis degumming system

Abstract

The utility model relates to the technical field of pyrolysis degumming, and discloses a pyrolysis degumming system which comprises a material conveying unit, a pyrolysis unit and an impurity separation unit, wherein the material conveying unit is used for conveying materials to be pyrolyzed and is of a heat storage arch structure with the high middle and the two low ends, the pyrolysis unit comprises an electric heating area used for providing pyrolysis heat for the pyrolysis degumming system, and the electric heating area forms a heat storage high-temperature area at the middle arch crown position of the material conveying unit through heating; the impurity separation unit is located on one side of the material conveying unit and used for degumming and separating the pyrolyzed materials. According to the utility model, materials can be fully preheated, heated, pyrolyzed and cooled, low-temperature inlet and low-temperature outlet are realized, and the heat loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal degumming, in particular to a thermal degumming system. Background Art

[0002] Organic colloids adhere to the surfaces of many industrial raw materials. For example, a layer of white glue adheres to many metal surfaces, such as the white edge materials in lithium batteries, the white glue adhered to the copper foil surface, and the white glue adhered to the aluminum foil surface. During the process of metal resource recovery, these white glues with a non-negligible proportion are impurities that have to be removed. Otherwise, it will affect the quality of the recycled metal and is not conducive to the subsequent remelting and smelting of the metal.

[0003] In the prior art, the common methods for metal degumming are physical degumming or solvent degumming. However, in physical degumming, the artificial cleaning method is used to clean the colloid on the surface. This method is feasible for a small amount of materials and the surface of large metal blocks, but it is not feasible for soft metal foils or large quantities. Solvent degumming is a widely used method, but usually organic solvents are used to remove organic colloids. The volatilization of organic solvents and the entrainment loss of the large specific surface area of the materials mean high costs, and the treatment of the solvent mixed with the colloid components after degumming will cause huge burdens in terms of economy and environmental protection.

[0004] Therefore, how to provide a thermal degumming system to achieve rapid thermal degumming and reduce the processing cost has become an urgent technical problem to be solved. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a thermal degumming system to achieve rapid thermal degumming and reduce the processing cost.

[0006] To this end, according to the first aspect, an embodiment of the utility model discloses a thermal degumming system, including: a material transmission unit, a pyrolysis unit, and an impurity separation unit;

[0007] Among them, the material transmission unit is used to transmit the material to be pyrolyzed and has a heat storage arch structure with a high middle and low ends. The pyrolysis unit includes an electric heating area for providing pyrolysis heat to the thermal degumming system. The electric heating area forms a heat storage high-temperature area at the middle arch top position of the material transmission unit through heating; the impurity separation unit is located on one side of the material transmission unit, and the impurity separation unit is used to perform degumming separation on the pyrolyzed material.

[0008] The utility model is further arranged such that the material transmission unit includes a transmission belt and a plurality of transmission shafts, and the transmission shafts are used to drive the transmission belt to move.

[0009] The utility model is further arranged such that the transmission shafts are provided with driving power by a transmission motor.

[0010] The utility model is further configured such that a feeding port for feeding materials is provided on one side of the conveyor belt relative to the impurity separation unit, and a discharge port is provided on the same side of the conveyor belt as the impurity separation unit.

[0011] The utility model is further configured such that the impurity separation unit includes an extrusion area and a screening area. The extrusion area is used for crushing the pyrolyzed materials; the screening area is used for screening the crushed materials to achieve thermal degumming of the materials.

[0012] The utility model is further configured such that the impurity separation unit further includes a pneumatic sweeping area, which is used to replace the screening area and is used for pneumatically sweeping the crushed materials.

[0013] The utility model has the following beneficial effects:

[0014] (1) Automatic and uniform feeding can be achieved. After feeding, during the transmission of the conveyor belt, the materials are fully preheated, heated, pyrolyzed, and cooled, achieving low-temperature input and low-temperature output, and reducing heat loss.

[0015] (2) The conveyor belt rotates by means of a transmission shaft, and its speed can be adjusted and controlled according to the pyrolysis effect to achieve sufficient pyrolysis.

[0016] (3) After pyrolysis, organic gums are usually partially in powder form, partially detached, and partially still embedded on the metal surface. Therefore, the gums in sheet form or embedded on the metal surface are thoroughly crushed by the extrusion equipment at the discharge port, and then enter the pneumatic sweeping (using a strong wind to sweep) or screening with a sieve to separate the gums, and the remaining is high-purity metal raw materials. Description of the Drawings

[0017] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of a thermal degumming system disclosed in this embodiment.

[0019] Reference numerals: 10, material transmission unit; 11, conveyor belt; 111, feeding port; 112, discharge port; 12, transmission shaft; 20, pyrolysis unit; 21, electric heating area; 30, impurity separation unit; 31, extrusion area; 32, screening area. Detailed Embodiments

[0020] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can also be the communication inside two components. It can be a wireless connection or a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0022] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] An embodiment of the present utility model discloses a thermal degumming system, as Figure 1 shown, including: a material transmission unit 10, a pyrolysis unit 20 and an impurity separation unit 30;

[0025] Among them, the material transmission unit 10 is used to transmit the material to be pyrolyzed and has a heat storage arch structure that is high in the middle and low at both ends. The pyrolysis unit 20 includes an electric heating area 21 for providing pyrolysis heat for the thermal degumming system. The electric heating area 21 forms a heat storage high-temperature area at the middle arch top position of the material transmission unit 10 through heating. The impurity separation unit 30 is located on one side of the material transmission unit 10, and the impurity separation unit 30 is used to perform degumming separation on the pyrolyzed material.

[0026] It should be noted that the electric heating zone 21 forms a heat storage high-temperature zone at the middle vault position of the material transmission unit 10 through heating. The material transmission unit 10 drives the material to move, making the organic colloid of the material become fragile fine particles and powders. The impurity separation unit 30 performs degumming separation on the pyrolyzed material, achieving rapid thermal degumming and reducing the processing cost.

[0027] As Figure 1 shown in the figure, the material transmission unit 10 includes a transmission belt 11 and a plurality of transmission shafts 12. The transmission shafts 12 are used to drive the transmission belt 11 to move. It should be noted that the transmission belt 11 rotates by means of the transmission shaft, and the speed can be adjusted and controlled according to the pyrolysis effect to achieve sufficient pyrolysis.

[0028] As Figure 1 shown in the figure, the transmission shaft 12 is provided with driving power by a transmission motor.

[0029] As Figure 1 shown in the figure, on one side of the transmission belt 11 relative to the impurity separation unit 30, there is a feeding port 111 for feeding the material, and the transmission belt 11 is provided with a discharging port 112 on the same side as the impurity separation unit 30.

[0030] As Figure 1 shown in the figure, the impurity separation unit 30 includes an extrusion zone 31 and a screening zone 32. The extrusion zone 31 is used to crush the pyrolyzed material; the screening zone 32 is used to screen the crushed material to achieve thermal degumming of the material. In the specific implementation process, the extrusion zone 31 extrudes the material at the discharging port 112 through an extrusion device, completely crushes the colloid on the metal surface, and then screens it through the sieve in the screening zone 32 to separate the colloid and obtain high-purity metal raw materials.

[0031] In an alternative embodiment, the impurity separation unit 30 further includes a pneumatic sweeping zone. The pneumatic sweeping zone is used to replace the screening zone 32 and is used to perform pneumatic sweeping on the crushed material. In the specific implementation process, the extrusion zone 31 extrudes the material at the discharging port 112 through an extrusion device, completely crushes the colloid on the metal surface, and then separates the colloid by the blowing force of the pneumatic sweeping zone to obtain high-purity metal raw materials.

[0032] In the specific implementation process, the present utility model utilizes the characteristics of the high melting point of metal materials and the easy decomposition, carbonization and embrittlement of organic colloids. Through high temperature, the organic colloid is turned into fragile fine particles and powders, thus achieving easy separation. Moreover, by using the principle of hot air rising, the heat is concentrated at the top, and a distinct temperature gradient is formed between the top, the feeding port and the discharging port, thereby not only achieving the pyrolysis target but also reducing energy loss. And by utilizing the nature of gas being omnipresent and the advantage of heat radiation, the surface colloid can be completely thermally decomposed.

[0033] Working principle: The entire system is installed in a heat storage arch structure with a higher middle and lower sides. Materials are fed from the feeding port onto the conveyor belt. The conveyor belt rotates under the action of the drive shaft, moving the materials towards the arch top. Due to the heat storage high-temperature area formed by the electric heating in the electric heating area and the rising hot air, during the movement of the materials towards the middle arch top, the temperature continuously rises, from preheating to heating and then to a temperature sufficient to thermally decompose the organic colloid. In the high-temperature area, the colloid is heated and carbonized and embrittled, and then continues to slowly move towards the discharge port. During the movement, because the discharge port is downward and the speed is slow, so during the movement from the high-temperature area to the discharge port, the materials gradually cool down with less heat loss and still remain in the high-temperature area of the arch top. The colloid in the materials discharged from the discharge port has been carbonized and embrittled, and the embrittled colloid can be broken into fine particles and powder through an extrusion device, and then degumming separation can be achieved through pneumatic separation or screening.

[0034] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present utility model.

Claims

1. A thermal degumming system, characterized in that, Comprising: A material transmission unit (10), a pyrolysis unit (20) and an impurity separation unit (30); Wherein, the material transmission unit (10) is used for transmitting the material to be pyrolyzed and has a heat storage arch structure with a high middle and low ends. The pyrolysis unit (20) includes an electric heating area (21) for providing pyrolysis heat to the pyrolysis degumming system. The electric heating area (21) forms a heat storage high-temperature area at the middle vault position of the material transmission unit (10) by heating. The impurity separation unit (30) is located on one side of the material transmission unit (10), and the impurity separation unit (30) is used for separating the degummed material after pyrolysis.

2. The thermal degumming system according to claim 1, wherein The material transmission unit (10) includes a transmission belt (11) and a plurality of transmission shafts (12), and the transmission shafts (12) are used for driving the transmission belt (11) to move.

3. The thermal degumming system according to claim 2, wherein, The transmission shaft (12) is provided with driving power by a transmission motor.

4. The thermal degumming system according to claim 2, wherein On one side of the transmission belt (11) relative to the impurity separation unit (30), there is a feeding port (111) for feeding materials, and the transmission belt (11) is provided with a discharging port (112) on the same side as the impurity separation unit (30).

5. The thermal degumming system according to claim 1 or 4, characterized in that, The impurity separation unit (30) includes an extrusion area (31) and a screening area (32). The extrusion area (31) is used for crushing the material after pyrolysis. The screening area (32) is used for screening the crushed material to achieve pyrolysis degumming of the material.

6. The thermal degumming system according to claim 5, wherein The impurity separation unit (30) further includes a wind sweeping area, the wind sweeping area is used to replace the screening area (32), and the wind sweeping area is used for wind sweeping the crushed material.

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