Waste photovoltaic panel back side treatment device

Abstract

The utility model relates to the technical field of waste photovoltaic panel recycling, in particular to a waste photovoltaic panel back side processing device which comprises a feeding device, a conveying device used for flatly conveying photovoltaic panels is arranged at the output end of the feeding device, a combustion device is arranged above the conveying device, and a waste photovoltaic panel back side processing device is arranged above the combustion device. The combustion device comprises a plurality of combustors which are arranged along the conveying direction of the conveying device and are used for spraying flames, the working part of the conveying device is provided with a smoke dust collecting device, and the tail end of the conveying device is provided with a collecting device, so that the original size of a silicon wafer is kept as far as possible, and the recovery purity and recovery value of glass are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste photovoltaic panel recycling, and particularly relates to a device for treating the back side of waste photovoltaic panels. Background Art

[0002] As the early invested photovoltaic modules have reached their service life, a large number of photovoltaic modules are facing retirement, and more and more waste modules will be generated.

[0003] Most of the existing photovoltaic panel treatment equipment adopts physical crushing treatment devices. During the physical crushing process, the photovoltaic panels need to withstand large external forces such as extrusion, twisting, vibration, and tearing, resulting in the silicon wafers inside the panels being broken due to the external forces. However, the products after physical crushing have problems that the silicon is in granular or powdery form, with low purity and difficult to separate. Especially after removing the backplane, due to the large viscosity of the back glue, incomplete treatment affects the recycling effect. Therefore, this technical solution is specifically proposed for improvement. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiency that the incomplete treatment of the back glue affects the recycling effect during the recycling of waste photovoltaic panels in the prior art, and to provide a device for treating the back side of waste photovoltaic panels.

[0005] In order to achieve the above purpose, the embodiments of the utility model specifically adopt the following technical solutions: A device for treating the back side of waste photovoltaic panels, including a feeding device, the output end of the feeding device is provided with a conveying device for flatly conveying photovoltaic panels, a combustion device is arranged above the conveying device, the combustion device includes a plurality of burners for spraying flames arranged along the conveying direction of the conveying device, a dust collection device is arranged at the working part of the conveying device, and a collection device is arranged at the end of the conveying device.

[0006] Further, the conveying device is two parallel conveyor belts, and heat-resistant protection plates are arranged on the sides of the conveyor belts.

[0007] Further, the combustion device includes a fuel pipe arranged along the length direction of the conveyor belt, and a plurality of branch pipes are arranged on the side of the fuel pipe and connected to the burners.

[0008] Further, electric valves for controlling the flame combustion amount are arranged on the branch pipes.

[0009] Further, the dust collection device includes a lower collection pipe arranged between the two conveyor belts, an upper collection pipe is arranged above the conveyor belts, a collection hood is arranged at the input end of the upper collection pipe, and the upper collection pipe and the lower collection pipe are connected to a dust combustion chamber and a cooling tower through pipelines.

[0010] Further, the collection device includes a cooling fan arranged at the tail of the conveying device for cooling.

[0011] The beneficial effects of the embodiments of the present utility model are as follows: A main fuel pipe is arranged along the length direction of the conveyor belt in the combustion device. The fuel used is natural gas, which meets the environmental protection requirements after combustion, has fewer by-products, is convenient to control. The fuel pipe is connected to the evenly distributed burners through multiple branch pipes. The temperature of the photovoltaic panel is raised to about 500 degrees through flame combustion, ensuring that the back glue on the back side of the photovoltaic panel decomposes rapidly at high temperature. After combustion, the back glue on the back of the photovoltaic panel has been completely burned out. After cooling, the materials left are only glass, silicon wafers and solder tapes, and then they can enter the next sorting process. Compared with the methods of peeling, extruding, milling, etc. of glass in the traditional physical crushing method, the obtained glass and silicon wafers are relatively complete and pure, and the original size of the silicon wafers is maintained as much as possible, improving the recycling purity and recycling value of the glass, and at the same time providing convenience for the subsequent silver extraction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0013] Figure 2 is a schematic top view structure diagram of the present utility model;

[0014] Figure 3 is a schematic enlarged structure diagram at A of the present utility model;

[0015] In the figure: 1, feeding device; 2, conveyor belt; 201, protective plate; 3, burner; 301, fuel pipe; 302, branch pipe; 303, electric valve; 4, upper collection pipe; 401, soot combustion chamber; 402, cooling tower; 5, collection device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following describes the preferred embodiments of the present utility model with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model.

[0017] See Figures 1 to 3 , the embodiments of the present utility model disclose a device for treating the back side of waste photovoltaic panels. The device for treating the back side of waste photovoltaic panels mainly consists of five major parts: a feeding device 1, a conveying device, a combustion device, a soot collection device and a collection device 5.

[0018] First, the waste photovoltaic panels are automatically fed into the system by the feeding device 1. The feeding device 1 uses automated devices such as robotic arms or conveyor belts to ensure that the photovoltaic panels with the glue boxes, aluminum frames, and backplates removed enter the conveying device smoothly and continuously with their back sides facing up. The conveying device uses two parallel high-temperature resistant conveyor belts 2, which can be chain conveyor belts 2 or plate conveyor belts 2. Each conveyor belt 2 has a moderate width to stably carry the photovoltaic panels and prevent them from slipping. During use, while ensuring the conveying effect, it also prevents the conveyor belt 2 from being burned by high temperatures, thus ensuring the use effect. On both sides of the conveyor belt 2, heat-resistant overflow protection plates 201 are installed, which not only protect the conveyor belt 2 from direct flame burning but also prevent heat dissipation from affecting the surrounding environment.

[0019] Along the length direction of the conveyor belt 2, the combustion device is provided with a main fuel pipe 301. Natural gas is used as the fuel, which meets the environmental protection requirements after combustion, has fewer by-products, and is convenient to control. The fuel pipe 301 is connected to a uniformly distributed burner 3 through multiple branch pipes 302. These burners 3 can precisely control the spraying direction and intensity of the flame, raising the temperature of the photovoltaic panel to about 500 degrees to ensure that the back glue on the back side of the photovoltaic panel decomposes rapidly at high temperatures. To further improve the treatment effect, electric valves 303 are installed on each branch pipe 302. By remotely adjusting the opening degree of the electric valve 303, the flame combustion amount of each burner 3 can be flexibly controlled, achieving precise adjustment of the flame intensity. In this way, it can not only ensure the full combustion of the back glue but also avoid damage to other parts of the photovoltaic panel caused by overheating.

[0020] During the combustion process, a certain amount of soot and harmful gases are generated. To protect the environment, a soot collection device is also installed on the conveying part of the conveyor belt 2, including a lower collection pipe arranged between the two conveyor belts 2 and an upper collection pipe 4 located above the conveyor belt 2. The lower collection pipe is arranged below the conveyor belt 2, and the soot sinking during the burning of the photovoltaic panel is collected through the lower collection pipe. The input end of the upper collection pipe 4 is equipped with a collection hood, which can effectively capture the rising soot, greatly reducing the soot overflow during the combustion process. The upper collection pipe 4 and the lower collection pipe are connected to a soot combustion chamber 401 and a cooling tower 402 through pipelines to form a closed-loop treatment process. The soot first enters the soot combustion chamber 401 for secondary combustion treatment to further reduce the content of harmful substances. Subsequently, the treated flue gas enters the cooling tower 402 for cooling, temperature reduction, and purification treatment, and finally discharges the tail gas meeting the environmental protection standards.

[0021] After being burned, the photovoltaic panels enter the collection device 5. The collection device 5 is equipped with a cooling fan, which quickly cools the photovoltaic panels by blowing cold air to ensure that they reach a safe temperature before entering the subsequent recycling process. During use, through the burning and collection technology on the back side of waste photovoltaic panels, efficient and clean treatment of the back glue on the back side of waste photovoltaic panels is achieved. This not only improves the recycling efficiency of silicon materials but also reduces the environmental pollution risk during the treatment process. After burning, the back glue on the back of the photovoltaic panels has been completely burned out. After cooling, the materials only remain glass, silicon wafers, and solder tapes, and then they can enter the next sorting process. Compared with the methods of peeling, squeezing, and milling glass in the traditional physical crushing method, the obtained glass and silicon wafers are relatively complete and pure, improving the recycling purity and value of the glass, maintaining the original size of the silicon wafers as much as possible, and also providing convenience for the subsequent silver extraction process.

[0022] It should be noted that in the description of the present utility model, the terms indicating directions or positional relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "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 be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0024] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, so that a process, article, or device / equipment including a series of elements not only includes those elements but also includes other elements not explicitly listed, or also includes the elements inherent in these processes, articles, or devices / equipment.

[0025] So far, the technical solution of the present utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easily understood by those skilled in the art that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present utility model.

Claims

1. A waste photovoltaic panel backside treatment device, characterized in that: It includes a feeding device (1). An output end of the feeding device (1) is provided with a conveying device for flatly conveying a photovoltaic panel. Above the conveying device, a combustion device is provided. The combustion device includes a plurality of burners (3) arranged along the conveying direction of the conveying device for ejecting flames. A soot collection device is arranged at a working part of the conveying device, and a collection device (5) is arranged at the end of the conveying device.

2. The waste photovoltaic panel backside processing device according to claim 1, wherein: The conveying device is two parallel conveyor belts (2), and heat-resistant protection plates (201) are arranged on sides of the conveyor belts (2).

3. The waste photovoltaic panel backside processing device according to claim 2, characterized in that: The combustion device includes a fuel pipe (301) arranged along the length direction of the conveyor belt (2). A plurality of branch pipes (302) are arranged on a side of the fuel pipe (301) and are connected to the burners (3).

4. The waste photovoltaic panel backside processing device according to claim 3, wherein: Electric valves (303) for controlling the combustion amount of the flames are arranged on the branch pipes (302).

5. The waste photovoltaic panel backside processing device according to claim 2, wherein: The soot collection device includes a lower collection pipe arranged between the two conveyor belts (2). An upper collection pipe (4) is arranged above the conveyor belts (2). An input end of the upper collection pipe (4) is provided with a collection hood. The upper collection pipe (4) and the lower collection pipe are communicated with a soot combustion chamber (401) and a cooling tower (402) through pipes.

6. The waste photovoltaic panel backside treatment device according to claim 1, characterized in that: The collection device (5) includes a cooling fan arranged at the tail of the conveying device for cooling.

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