A device for improving the pyrolysis efficiency of EVA adhesive film in waste photovoltaic panels

Abstract

This invention provides a device for improving the pyrolysis efficiency of EVA film in waste photovoltaic panels. The device includes a vertically structured pyrolysis furnace with an electric heating wire inside. The furnace has a feed inlet at the top and a discharge outlet at the bottom. Multiple layers of storage boxes are spaced vertically within the furnace, with 2-5 boxes per layer, and adjacent layers are staggered. The storage boxes are connected to a motor on the outside of the furnace via connecting rods, and the motor drives the boxes to rotate. An inert gas inlet is located on the bottom sidewall of the furnace, and a pyrolysis gas outlet is located at the top. This invention employs a vertical pyrolysis furnace structure with multiple layers of staggered storage boxes. By using these staggered storage boxes to gradually fill and disperse EVA, bottom accumulation is reduced, significantly improving pyrolysis efficiency and material throughput. The motor-driven rotation of the storage boxes simplifies the residue discharge process and reduces energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of resource recycling technology, and in particular to a device for improving the pyrolysis efficiency of EVA film in waste photovoltaic panels. Background Technology

[0002] Waste EVA from discarded photovoltaic modules contains components such as solar cells and solder ribbons. This waste is often treated by pyrolysis, where EVA is pyrolyzed under a protective atmosphere. During pyrolysis, EVA becomes liquid and accumulates at the bottom of the pyrolysis furnace, resulting in low pyrolysis efficiency and severe carbonization. Existing equipment has not effectively addressed this problem. Therefore, there is an urgent need for a device that can effectively disperse molten EVA and improve pyrolysis efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a device for improving the pyrolysis efficiency of EVA film in waste photovoltaic panels. By dispersing EVA distribution through multi-layer staggered storage boxes, the pyrolysis efficiency is improved, solving the problem of low pyrolysis efficiency and severe carbonization caused by the accumulation of molten EVA liquid at the bottom in existing pyrolysis devices.

[0004] According to the purpose of this utility model, this utility model provides a device for improving the pyrolysis efficiency of EVA film in waste photovoltaic panels, including a vertically structured pyrolysis furnace. The pyrolysis furnace is equipped with an electric heating wire inside, a feed inlet at the top, and a discharge outlet at the bottom. Multiple layers of storage boxes are spaced vertically inside the pyrolysis furnace, with 2-5 storage boxes per layer, and adjacent layers are staggered. The storage boxes are connected to a motor outside the pyrolysis furnace via connecting rods, and the motor drives the storage boxes to rotate. An inert gas inlet is located on the bottom side wall of the pyrolysis furnace, and a pyrolysis gas outlet is located at the top.

[0005] Furthermore, the storage box has 2-4 layers.

[0006] Furthermore, the depth of the storage box is 2-20cm.

[0007] Furthermore, the storage box is square, arc-shaped, or circular in shape.

[0008] Furthermore, the flipping angle of the storage box is 90°-180°.

[0009] Furthermore, the motor is connected to the bottom or side wall of the storage box via the connecting rod.

[0010] Furthermore, the air inlet is located on both symmetrical sides of the bottom sidewall of the pyrolysis furnace.

[0011] Furthermore, the material of the storage box is high-temperature resistant stainless steel or ceramic composite material.

[0012] Furthermore, the electric heating wire is spirally arranged along the inner wall of the pyrolysis furnace and extends to the periphery of each layer of the storage box.

[0013] Furthermore, an inclined guide plate is provided between the discharge port and the bottom of the pyrolysis furnace, and the inclination angle of the guide plate is 30°-60°.

[0014] The technical solution of this utility model adopts a vertical pyrolysis furnace structure with multiple layers of staggered storage boxes inside. By using multiple layers of staggered storage boxes to fill and disperse EVA, the accumulation at the bottom is reduced, significantly improving pyrolysis efficiency and material throughput. The storage boxes are driven by a motor to rotate, simplifying the residue discharge process and reducing energy consumption. This device has a simple structure, low energy consumption, and is suitable for industrial applications. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the internal structure of an embodiment of the present utility model:

[0017] Figure 2 This is a top view of an embodiment of the present utility model;

[0018] In the diagram: 1. Pyrolysis furnace; 2. Electric heating wire; 3. Feed inlet; 4. Discharge outlet; 5. Guide plate; 6. Storage box; 7. Connecting rod; 8. Motor; 9. Air inlet; 10. Air outlet. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Example 1

[0023] like Figure 1 and Figure 2 As shown, an apparatus for improving the pyrolysis efficiency of EVA film in waste photovoltaic panels includes a vertically structured pyrolysis furnace 1. The pyrolysis furnace 1 is equipped with an electric heating wire 2, which is spirally arranged along the inner wall of the pyrolysis furnace 1 and extends to the periphery of each layer of storage boxes.

[0024] The pyrolysis furnace 1 has a feed inlet 3 at the top and a discharge outlet 4 at the bottom. Materials are fed into the pyrolysis furnace 1 through the feed inlet 3, and the discharge outlet 4 is used to discharge the materials after pyrolysis. An inclined guide plate 5 is provided between the discharge outlet 4 and the bottom of the pyrolysis furnace 1, and the inclination angle of the guide plate 5 is 30°-60°.

[0025] The pyrolysis furnace 1 has multiple layers of storage boxes 6 arranged vertically along the furnace body. Each layer contains 2-5 high-temperature resistant storage boxes 6, and the storage boxes 6 in adjacent layers are staggered. In this embodiment, the storage boxes 6 are made of high-temperature resistant stainless steel or ceramic composite material. In this embodiment, the storage boxes 6 are arranged in a staggered manner in three-dimensional space, with 3 boxes arranged in each layer. When EVA waste enters the pyrolysis furnace from the feed inlet, because the storage boxes 6 are staggered, each storage box in each layer can be filled, and only a small portion of the material falls to the bottom.

[0026] In a vertically structured pyrolysis furnace 1, when EVA waste is fed from the top, the EVA falls directly to the bottom, causing accumulation. To address this, this embodiment arranges high-temperature resistant storage boxes 6 at intervals along the vertical direction of the pyrolysis furnace 1, capable of storing liquid EVA. EVA and other waste materials can fall into these storage boxes 6 at different heights for pyrolysis. These storage boxes 6 are staggered vertically. During feeding, because the boxes are staggered, each box can be filled with EVA waste, distributing the waste at different heights within the furnace for pyrolysis. This increases the amount of EVA used and prevents accumulation at the bottom, significantly improving pyrolysis efficiency.

[0027] The storage box 6 is connected to an external motor 8 via a connecting rod 7. The motor 8 is located outside the pyrolysis furnace 1 and controls the storage box 6 to tilt to discharge pyrolysis residues. In this embodiment, the motor 8 is connected to the bottom or side wall of the storage box 6 via the connecting rod 7.

[0028] In this embodiment, the storage box 6 is connected to the external motor 8 via the connecting rod 7. The storage box 6 can be flipped so that the pyrolysis residue of silicon wafers and solder ribbons inside the storage box 6 fall to the bottom. The number of storage boxes 6 depends on the amount of material fed in.

[0029] When pyrolysis accumulates for a certain period of time, the silicon wafers and solder ribbons produced by pyrolysis fill the storage box 6. At this time, the motor starts to move, the storage box 6 flips, and all the waste falls into the bottom of the pyrolysis device. Then the bottom outlet is opened to discharge the waste.

[0030] The pyrolysis furnace 1 has an inert gas inlet 9 on its bottom side wall and a pyrolysis gas outlet 10 on its top. Inert gas enters through the bottom side inlet 9, protecting the entire furnace. Gases generated during pyrolysis are discharged through the top outlet 10, and waste is discharged through the bottom outlet 4. In this embodiment, the inlets are located on symmetrical sides of the bottom side wall of the pyrolysis furnace.

[0031] In this embodiment, the storage box 6 has 3 layers. In other embodiments, the storage box 6 may have 2 or 4 layers.

[0032] In this embodiment, the depth of the storage box 6 is 2-20cm, and the shape of the storage box 6 is square, arc-shaped or circular.

[0033] In this embodiment, the flipping angle of the storage box 6 is 90°-180°.

[0034] This invention avoids the problems of EVA accumulation at the bottom, low pyrolysis efficiency, and easy carbonization during large-scale pyrolysis production. It can effectively improve the pyrolysis efficiency of EVA and increase the weight of processed EVA.

[0035] When using this utility model:

[0036] Feeding stage:

[0037] EVA waste enters the pyrolysis furnace through the feed inlet and falls layer by layer into the storage boxes, avoiding direct accumulation at the bottom of the pyrolysis furnace; when feeding through the feed inlet, material is fed into each storage box of each layer separately, so that each storage box of each layer is filled with EVA waste, achieving EVA distribution at different heights in the furnace.

[0038] Pyrolysis stage: Inert gas is introduced from the bottom air inlet of the pyrolysis furnace and heated to the set temperature. EVA is then pyrolyzed in each layer of storage boxes.

[0039] Discharge stage: After pyrolysis is completed, the motor drives the storage box to flip, and the residue falls to the bottom and is discharged through the discharge port;

[0040] Gas treatment: Pyrolysis gas enters the purification system through the top outlet.

[0041] This invention employs a vertical pyrolysis furnace structure with multiple layers of staggered storage boxes inside. By using these multi-layered, staggered storage boxes to progressively fill and disperse EVA, bottom accumulation is reduced, significantly improving pyrolysis efficiency and material throughput. A motor drives the storage boxes to rotate, simplifying the residue discharge process and reducing energy consumption. This device is simple in structure, low in energy consumption, and suitable for industrial applications.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for improving the pyrolysis efficiency of EVA adhesive film in waste photovoltaic panels, characterized in that, The pyrolysis furnace includes a vertical structure, an electric heating wire inside, a feed inlet at the top, and a discharge outlet at the bottom. Multiple layers of storage boxes are spaced vertically inside the furnace, with 2-5 boxes per layer, and adjacent layers are staggered. Each storage box is connected to a motor on the outside of the furnace via a connecting rod, and the motor drives the storage boxes to rotate. An inert gas inlet is located on the bottom sidewall of the furnace, and a pyrolysis gas outlet is located at the top.

2. The device for improving the pyrolysis efficiency of EVA adhesive film in waste photovoltaic panels according to claim 1, characterized in that, The storage box has 2-4 layers.

3. The device for improving the pyrolysis efficiency of EVA adhesive film in waste photovoltaic panels according to claim 1, characterized in that, The depth of the storage box is 2-20cm.

4. The device for improving the pyrolysis efficiency of EVA adhesive film in waste photovoltaic panels according to claim 1, characterized in that, The storage box is square, arc-shaped, or circular.

5. The device for improving the pyrolysis efficiency of EVA adhesive film in waste photovoltaic panels according to claim 1, characterized in that, The storage box has a flip angle of 90°-180°.

6. The device for improving the pyrolysis efficiency of EVA adhesive film in waste photovoltaic panels according to claim 1, characterized in that, The motor is connected to the bottom or side wall of the storage box via the connecting rod.

7. The device for improving the pyrolysis efficiency of EVA adhesive film in waste photovoltaic panels according to claim 1, characterized in that, The air inlets are located on both symmetrical sides of the bottom sidewall of the pyrolysis furnace. 8.The device for improving the pyrolysis efficiency of EVA adhesive film in waste photovoltaic panels according to claim 1, wherein, The storage box is made of high-temperature resistant stainless steel or ceramic composite material.

9. The device for improving the pyrolysis efficiency of EVA adhesive film in waste photovoltaic panels according to claim 1, characterized in that, The electric heating wires are spirally arranged along the inner wall of the pyrolysis furnace and extend to the periphery of the storage boxes in each layer.

10. The device for improving the pyrolysis efficiency of EVA adhesive film in waste photovoltaic panels according to claim 1, characterized in that, An inclined guide plate is provided between the discharge port and the bottom of the pyrolysis furnace, and the inclination angle of the guide plate is 30°-60°.

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