Multi-layer floating type photovoltaic pyrolysis tray

Abstract

The invention provides a multilayer floating type photovoltaic pyrolysis tray which comprises a frame, a plurality of tray bodies and a dust collecting groove, the tray bodies are arranged in the vertical direction and connected to the frame, the upper ends of the tray bodies are fixedly connected with a plurality of bearing strips, every two adjacent bearing strips are parallel to each other, the bearing strips are used for bearing photovoltaic modules, and the dust collecting groove is formed in the frame. A plurality of through holes are formed in the positions, between every two adjacent bearing strips, of the disc body; the dust collecting groove is fixedly connected to the lower portion of each tray body through a connecting rod, and a space used for ventilation is reserved between the dust collecting groove and the tray bodies. The device can bear a plurality of photovoltaic modules at the same time, and the processing capacity is remarkably improved under the condition of the same hearth section. By arranging the bearing strips, the lower surface of the photovoltaic module can be fully pyrolyzed and decarbonized, the glass is kept in a low-constraint supporting state in the pyrolysis process, and the explosion risk caused by thermal stress is greatly reduced. And by arranging the dust collecting groove, dust formed on the lower surface of the photovoltaic module can be discharged in time, and the workload of manual dust removal is reduced.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module recycling technology, and in particular to a multi-layer floating photovoltaic pyrolysis tray. Background Technology

[0002] With the large-scale construction of photovoltaic power plants and their gradual entry into the concentrated decommissioning period, the harmless, resource-based, and high-value utilization of waste crystalline silicon photovoltaic modules has become an important issue. Crystalline silicon modules are typically composed of multiple layers, including tempered glass, silicon solar cells, EVA film, backsheet (some are fluorinated backsheets), busbars, and junction boxes. To achieve high-quality recycling of high-value materials such as glass and solar cells, engineering has gradually developed a debinding route centered on low-oxygen or oxygen-free pyrolysis. This involves heating the modules to 450–600°C in roller or chain-type pyrolysis furnaces, causing the EVA and backsheet to decompose and lose adhesion, and the glass and solar cells to separate. In existing equipment, photovoltaic modules are mostly supported by single-layer chain plates or roller conveyors. The modules are laid flat on chain plates, roller conveyors, or simple trays and processed segment by segment through preheating, pyrolysis, and slow cooling zones. After pyrolysis, the glass and solar cells are unloaded manually or mechanically.

[0003] Existing technologies have significant shortcomings in the following aspects: First, in terms of throughput, the single-layer tray or single-layer chain plate structure limits the number of components that can be arranged within the furnace cross-section. Even if the total throughput can be increased by increasing the furnace length or widening the furnace, the problem of diminishing marginal benefits exists in actual engineering due to constraints on plant space and thermal efficiency. When attempting to stack two or more components on existing trays, the tray structure is not designed for the stacked heat flow, support method, and airflow channels, which easily leads to uneven temperature, incomplete delamination, and localized severe adhesive residue in "heat shadow zones" and airflow dead zones between the upper and lower components. Second, in terms of glass integrity protection, existing trays mostly use rigid flat plates or hard limiting frames, which restrict the thermal expansion of components, especially double-glass components and large-size components. During the heating, heat preservation, and cooling stages, large thermal stress is easily generated, leading to edge cracking, corner cracking, or even overall breakage. This problem is even more prominent when stacking components. Thirdly, in terms of residual carbon removal and ash removal, the bottom of traditional trays is mostly a solid plate or simple holes, without forming a systematic residual carbon flow and self-falling ash path. After pyrolysis, residual carbon and ash powder easily accumulate on the surface of the tray and the bottom of the furnace, resulting in low online decarbonization efficiency and serious coking in the furnace. Frequent furnace shutdowns, cooling, tray disassembly, and manual cleaning are required, which directly affects the continuity and economy of the pyrolysis line. Summary of the Invention

[0004] The purpose of this invention is to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a multi-layer floating photovoltaic pyrolysis tray, which can increase processing throughput and improve glass integrity.

[0005] This invention proposes a multi-layer floating photovoltaic pyrolysis tray, comprising: a frame, a tray body, and a dust collection trough. The tray body has several vertically arranged sections connected to the frame. Several support strips are fixedly connected to the upper end of the tray body, with adjacent support strips being parallel to each other. The support strips are used to support photovoltaic modules. The tray body has multiple through holes between adjacent support strips. The dust collection trough is fixedly connected to the bottom of each tray body by several connecting rods. A ventilation space is left between the dust collection trough and the tray body. The projection of the through holes in the vertical direction falls into the area of ​​the dust collection trough.

[0006] In some embodiments, a cushioning pad is fixedly connected to the upper end of each support bar.

[0007] In some embodiments, the cushioning pad is made of ceramic fiber.

[0008] In some embodiments, the bottom surface of the ash collection trough is provided with an ash discharge port, the bottom surface of the ash collection trough is an inclined surface that slopes toward the ash discharge port, and the ash discharge port is located at the lowest point of the bottom surface of the ash collection trough.

[0009] In some embodiments, the ash discharge port is connected to the through hole directly opposite the adjacent lower disc body via an ash discharge pipe.

[0010] In some embodiments, the frame is made of stainless steel or alloy steel.

[0011] In some embodiments, the frame is a rectangular frame.

[0012] In some embodiments, reinforcing ribs are fixedly connected between the frame and the disk body.

[0013] In some embodiments, the frame includes studs and connecting beams. The studs are provided in a rectangular arrangement, and the connecting beams are fixedly connected between the four studs to form a rectangular frame structure. The connecting beams are provided in at least two layers.

[0014] In some embodiments, the four corners of the disc are provided with through holes, the disc is fitted into the outside of the stud through the through holes, and the stud is connected to the adjusting nut by threads. The adjusting nut is located at the lower end of each disc, and the ash discharge pipe is a telescopic pipe. Attached Figure Description

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings. in: Figure 1 This is a schematic diagram of the structure of a multi-layer floating photovoltaic pyrolysis tray according to an embodiment of the present invention; Figure 2 for Figure 1 Top view; Figure label: 1. Connecting beam; 2. Buffer pad; 3. Bearing strip; 4. Disc; 5. Adjusting nut; 6. Connecting rod; 7. Ash collection trough; 8. Stud; 9. Ash discharge pipe; 10. Through hole. Detailed Implementation

[0016] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0017] The following describes an embodiment of the multi-layer floating photovoltaic pyrolysis tray with reference to the accompanying drawings.

[0018] like Figure 1 , Figure 2 As shown in the figure, this embodiment of the invention proposes a multi-layer floating photovoltaic pyrolysis tray, including: a frame, a tray body 4 and a dust collection trough 7. The tray body 4 has several vertically arranged and connected to the frame. Several bearing strips 3 are fixedly connected to the upper end of the tray body 4. Adjacent bearing strips 3 are parallel to each other. The bearing strips 3 are used to support photovoltaic modules. The tray body 4 has several through holes 10 evenly opened between adjacent bearing strips 3. The dust collection trough 7 is fixedly connected to the bottom of each tray body 4 by several connecting rods 6. A space for ventilation is left between the dust collection trough 7 and the tray body 4. The projection of the through holes 10 in the vertical direction falls into the area of ​​the dust collection trough 7.

[0019] This invention, by setting up multiple trays 4, can simultaneously support multiple photovoltaic modules, significantly improving processing capacity within the same furnace cross-section. The support bars 3 ensure thorough pyrolysis and decarburization of the lower surface of the photovoltaic modules, maintaining the glass in a low-constraint support state during pyrolysis and greatly reducing the risk of cracking due to thermal stress. The ash collection trough 7 allows for timely discharge of ash formed on the lower surface of the photovoltaic modules, reducing manual cleaning workload and improving the continuity of pyrolysis furnace operation.

[0020] In use, the tray of this embodiment is arranged in a continuous conveying pyrolysis furnace. During the pyrolysis process, the upper and lower surfaces of the photovoltaic module can be fully heated and thus fully pyrolyzed. During the decarburization process, air or oxygen not only heats and decarburizes the upper surface of the photovoltaic module, but also decarburizes the lower surface of the photovoltaic module through the space between the tray 4 and the ash collection trough 7 and the through holes 10 opened in the tray 4. The ash formed after decarburization of the lower surface of the photovoltaic module detaches from the photovoltaic module due to its own gravity and falls into the ash collection trough 7 through the through holes 10 of the tray 4.

[0021] Furthermore, the inner contour dimensions of the disk body 4 are slightly larger than the size of the photovoltaic module. For example, for a 2100mm×1300mm module, the inner diameter of the disk body 4 can be 2150~2250mm×1350~1450mm. Expansion and loading / unloading gaps are reserved around the perimeter, so that the photovoltaic module does not directly contact the frame and prevents insufficient pyrolysis at the corners.

[0022] Furthermore, the spacing between two adjacent disks 4 is 250-400mm to form a two- or multi-layer stacked structure.

[0023] Furthermore, the entire pallet is made of materials that can withstand temperatures above 600℃.

[0024] Furthermore, the width of the bearing strip 3 is 20-50mm, and the spacing between two adjacent bearing strips 3 is 150-250mm.

[0025] Furthermore, the through-hole 10 can be circular or rectangular in shape, forming a matrix arrangement.

[0026] In some embodiments, such as Figure 1 As shown, a buffer pad 2 is fixedly connected to the upper end of each support bar 3. This forms a floating support structure of "multi-point flexible support in the middle + free expansion on all four sides," which can prevent damage to the glass plate.

[0027] Furthermore, the thickness of the cushioning pad 2 is 3–10 mm.

[0028] In some embodiments, the cushioning pad 2 is made of ceramic fiber. Ceramic fiber is a fibrous, lightweight refractory material with advantages such as light weight, high temperature resistance, good thermal stability, low thermal conductivity, low specific heat, and resistance to mechanical vibration.

[0029] In some embodiments, such as Figure 1 As shown, the bottom surface of the ash collection trough 7 is provided with an ash discharge port. The bottom surface of the ash collection trough 7 is an inclined surface that slopes towards the ash discharge port, and the ash discharge port is located at the lowest point of the bottom surface of the ash collection trough 7.

[0030] In some embodiments, such as Figure 1 As shown, the ash discharge port is connected to the through hole 10 directly opposite the lower disk 4 via an ash discharge pipe 9. This allows the ash falling from the upper disk 4 to fall through the ash discharge pipe 9 onto the ash collection trough 7 of the lower disk 4, and then be discharged outward from the ash discharge port of the lower disk 4.

[0031] Furthermore, a solenoid valve can be installed at the ash discharge port of the lowest disc 4. When it moves to the designated position, the solenoid valve can be opened remotely to discharge the ash material. Alternatively, a solenoid valve can be omitted, and the ash material can be directly discharged onto the conveyor belt surface of the transmission mechanism. When the conveyor belt rotates downwards, the ash material will fall automatically. A collection disc can be installed at the downward rotation point to collect the ash material.

[0032] In some embodiments, the frame is made of stainless steel or alloy steel.

[0033] In some embodiments, the frame is a rectangular frame.

[0034] In some embodiments, reinforcing ribs are fixedly connected between the frame and the tray body 4 to improve the overall structural stability of the tray.

[0035] In some embodiments, such as Figure 1 , Figure 2 As shown, the frame includes studs 8 and connecting beams 1. There are four studs 8 arranged in a rectangular shape. The connecting beams 1 are welded and fixed between the four studs 8 to form a rectangular frame structure. The connecting beams 1 have at least two layers.

[0036] In some embodiments, such as Figure 1 , Figure 2 As shown, the four corners of the disc 4 are provided with through holes. The disc 4 is fitted onto the outside of the stud 8 through the through holes. The stud 8 is connected to the adjusting nut 5 by threads. The adjusting nut 5 is located at the lower end of each disc 4. The ash discharge pipe 9 is a telescopic pipe. By rotating the adjusting nut 5, the position of the disc 4 can be adjusted in the vertical direction.

[0037] Furthermore, the ash discharge pipe 9 is a telescopic sleeve structure, which extends and retracts as the position of the disc 4 is adjusted in the vertical direction.

[0038] In the description of this invention, 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," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0039] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0043] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A multi-layer floating photovoltaic pyrolysis tray, characterized in that, include: frame; The disk body has several vertically arranged components connected to the frame. Several support bars are fixedly connected to the upper end of the disk body. Adjacent support bars are parallel to each other. The support bars are used to support photovoltaic modules. Multiple through holes are opened between adjacent support bars in the disk body. The ash collection trough is fixedly connected to the bottom of each of the discs by several connecting rods. There is a space for ventilation between the ash collection trough and the disc. The projection of the through hole in the vertical direction falls into the area of ​​the ash collection trough.

2. The multi-layer floating photovoltaic pyrolysis tray according to claim 1, characterized in that, A cushioning pad is fixedly connected to the upper end of each of the aforementioned support bars.

3. The multi-layer floating photovoltaic pyrolysis tray according to claim 2, characterized in that, The cushioning pad is made of ceramic fiber.

4. The multi-layer floating photovoltaic pyrolysis tray according to claim 1, characterized in that, The bottom surface of the ash collection trough is provided with an ash discharge port, and the bottom surface of the ash collection trough is an inclined surface that slopes toward the ash discharge port. The ash discharge port is located at the lowest point of the bottom surface of the ash collection trough.

5. The multi-layer floating photovoltaic pyrolysis tray according to claim 4, characterized in that, The ash discharge port is connected to the through hole directly opposite the lower disk body via an ash discharge pipe.

6. The multi-layer floating photovoltaic pyrolysis tray according to claim 1, characterized in that, The frame is made of stainless steel or alloy steel.

7. The multi-layer floating photovoltaic pyrolysis tray according to claim 1, characterized in that, The frame is a rectangular frame.

8. The multi-layer floating photovoltaic pyrolysis tray according to claim 1, characterized in that, The frame is fixedly connected to the disk body by reinforcing ribs.

9. The multi-layer floating photovoltaic pyrolysis tray according to claim 5, characterized in that, The frame includes studs and connecting beams. There are four studs arranged in a rectangular shape. The connecting beams are fixedly connected between the four studs to form a rectangular frame structure. The connecting beams have at least two layers.

10. The multi-layer floating photovoltaic pyrolysis tray according to claim 9, characterized in that, The four corners of the disc are provided with through holes. The disc is fitted into the outside of the stud through the through holes. An adjusting nut is connected to the stud by a thread. The adjusting nut is located at the lower end of each disc. The ash discharge pipe is a telescopic pipe.

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