A roller conveyor pyrolysis device for photovoltaic panel pyrolysis

Abstract

This invention proposes a roller conveyor type pyrolysis device for photovoltaic panel pyrolysis, comprising: a pyrolysis chamber, a decarburization chamber, an air curtain mechanism, and a conveyor roller conveyor. The pyrolysis chamber has a nitrogen inlet and a pyrolysis gas outlet. The nitrogen inlet of the pyrolysis chamber is connected to a nitrogen input pipe, and a pressure control valve is connected to the nitrogen input pipe to control the gas pressure in the pyrolysis chamber to be greater than or equal to the gas pressure in the decarburization chamber. The decarburization chamber has an air inlet and an exhaust outlet. A lifting baffle is connected between the decarburization chamber and the pyrolysis chamber, and the air curtain mechanism is connected to the lifting baffle. The conveyor roller conveyor runs horizontally through the pyrolysis chamber and the decarburization chamber, and a tray for carrying photovoltaic panels is provided on the conveyor roller conveyor. This invention enables continuous feeding, prevents the atmosphere in the decarburization chamber from flowing into the pyrolysis chamber, and also prevents outside air from entering the pyrolysis chamber, preventing the atmosphere in the pyrolysis chamber from being mixed during continuous feeding, thus ensuring the degree of pyrolysis of the photovoltaic panels.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic panel recycling technology, and in particular to a roller conveyor pyrolysis device for photovoltaic panel pyrolysis. Background Technology

[0002] Photovoltaic modules typically consist of an aluminum frame, a junction box, tempered glass, EVA film crystalline silicon solar cells, and a TPT backsheet. A complete photovoltaic panel refers to the entire tempered glass panel (the whole sheet), EVA film crystalline silicon solar cells, and TPT backsheet after the aluminum frame and junction box have been removed from the photovoltaic module. Waste photovoltaic panels can be processed using a pyrolysis system to recycle the glass panel and silicon wafers.

[0003] Existing pyrolysis systems cannot achieve continuous feeding because the pyrolysis chamber requires an oxygen-free atmosphere for pyrolysis of photovoltaic panels, while the decarburization chamber requires an oxygen-rich atmosphere or air for decarburization. Typically, the pyrolysis and decarburization chambers are connected but separated by a sealed door. When a new photovoltaic panel enters the pyrolysis chamber, the sealed door at the inlet must be opened, inevitably bringing outside air into the chamber and disrupting the oxygen-free atmosphere. Similarly, when a previous photovoltaic panel enters the decarburization chamber after pyrolysis, the sealed door at the outlet must be opened, also introducing air from the decarburization chamber into the pyrolysis chamber. Furthermore, the presence of oxygen or other gases during pyrolysis affects the completeness of the pyrolysis process and also poses certain safety hazards. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art. To this end, embodiments of the present invention provide a roller conveyor type pyrolysis device for photovoltaic panel pyrolysis, which enables continuous feeding, prevents the mixing of other atmospheres in the pyrolysis chamber, and ensures the completeness of photovoltaic panel pyrolysis.

[0005] This invention provides a roller conveyor pyrolysis device for photovoltaic panel pyrolysis, comprising: a pyrolysis chamber, a decarbonization chamber, and a conveyor roller conveyor. The pyrolysis chamber has a nitrogen inlet and a pyrolysis gas outlet. The nitrogen inlet of the pyrolysis chamber is connected to a nitrogen input pipe, and a pressure control valve is connected to the nitrogen input pipe to control the gas pressure in the pyrolysis chamber to be greater than or equal to the gas pressure in the decarbonization chamber. The pyrolysis chamber is equipped with a first pressure sensor. The decarbonization chamber has an air inlet and an exhaust outlet. A lifting baffle is connected between the decarbonization chamber and the pyrolysis chamber. A hydraulic mechanism drives the lifting baffle to move vertically, and the lifting height of the lifting baffle is adjusted according to the specifications of the photovoltaic panel. The decarbonization chamber is equipped with a second pressure sensor. The conveyor roller conveyor runs horizontally through the pyrolysis chamber and the decarbonization chamber, and a tray for carrying the photovoltaic panel is provided on the conveyor roller conveyor.

[0006] In some embodiments, an air curtain mechanism is connected to the lifting baffle. The air curtain mechanism has an air inlet and an air outlet. The air curtain mechanism sprays air in a vertical direction, and the resulting air wall separates the pyrolysis chamber and the decarbonization chamber. The air inlet of the air curtain mechanism is connected to a nitrogen tank.

[0007] In some embodiments, a fixed baffle is connected between the decarbonization chamber and the pyrolysis chamber. The fixed baffle and the lifting baffle are positioned opposite each other in the vertical direction. The lifting baffle moves toward or away from the fixed baffle. The air curtain mechanism sprays air toward the fixed baffle. A space is left between the lifting baffle and the fixed baffle for the conveyor rollers, trays and photovoltaic panels to pass through.

[0008] In some embodiments, the fixed baffle is provided with an auxiliary air curtain mechanism, which has an air inlet and an air outlet. The air outlet direction of the auxiliary air curtain mechanism is opposite to that of the air curtain mechanism, and the air inlet of the auxiliary air curtain mechanism is connected to a nitrogen tank.

[0009] In some embodiments, the air curtain mechanism and the auxiliary air curtain mechanism are located on the pyrolysis chamber side.

[0010] In some embodiments, the lifting baffle is located above the fixed baffle.

[0011] In some embodiments, the height of the fixed baffle is less than half the height of the pyrolysis chamber.

[0012] In some embodiments, the pyrolysis gas outlet of the pyrolysis chamber is connected to the combustion chamber, and the exhaust port of the combustion chamber is connected to the exhaust gas treatment system.

[0013] In some embodiments, the air curtain mechanism is slidably sealed to the housing of the pyrolysis chamber.

[0014] In some embodiments, an oxygen sensor is connected to the pyrolysis chamber, and the oxygen sensor is connected to an alarm located outside the pyrolysis chamber. Attached Figure Description

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings.

[0016] in:

[0017] Figure 1 This is a schematic diagram of the structure of a roller conveyor pyrolysis device for photovoltaic panel pyrolysis in an embodiment of the present invention;

[0018] Figure label:

[0019] 1. Pyrolysis chamber; 2. Air curtain mechanism; 3. Lifting baffle; 4. Decarbonization chamber; 5. Conveyor roller conveyor; 6. Pallet; 7. Nitrogen inlet; 8. Auxiliary air curtain mechanism; 9. Fixed baffle; 10. Air inlet. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0021] The following description, with reference to the accompanying drawings, describes a roller conveyor pyrolysis apparatus for photovoltaic panel pyrolysis according to an embodiment of the present invention.

[0022] like Figure 1 As shown in the figure, this invention proposes a roller conveyor type pyrolysis device for photovoltaic panel pyrolysis, comprising: a pyrolysis chamber 1, a decarbonization chamber 4, and a conveyor roller conveyor 5. The pyrolysis chamber 1 has a nitrogen inlet 7 and a pyrolysis gas outlet. The nitrogen inlet 7 of the pyrolysis chamber 1 is connected to a nitrogen input pipe, and a pressure control valve is connected to the nitrogen input pipe to control the gas pressure in the pyrolysis chamber 1 to be greater than or equal to the gas pressure in the decarbonization chamber 4. The pyrolysis chamber 1 is equipped with a first pressure sensor. The decarbonization chamber 4 has an air inlet 10 and an exhaust port. A lifting baffle 3 is connected between the decarbonization chamber 4 and the pyrolysis chamber 1. A hydraulic mechanism drives the lifting baffle 3 to move vertically. The lifting height of the lifting baffle 3 is adjusted according to the specifications of the photovoltaic panel. The decarbonization chamber 4 is equipped with a second pressure sensor. The conveyor roller conveyor 5 runs horizontally through the pyrolysis chamber 1 and the decarbonization chamber 4, and a tray 6 for carrying the photovoltaic panel is provided on the conveyor roller conveyor 5.

[0023] In this embodiment of the invention, a pressure control valve is installed in the nitrogen input pipe of the pyrolysis chamber 1 to control the gas pressure in the pyrolysis chamber 1 to be greater than or equal to the gas pressure in the decarbonization chamber 4. This prevents the atmosphere in the decarbonization chamber 4 from flowing into the pyrolysis chamber 1 and also prevents outside air from entering the pyrolysis chamber 1. This also prevents the atmosphere in the pyrolysis chamber 1 from being mixed during continuous feeding and ensures the degree of pyrolysis of the photovoltaic panel.

[0024] By installing a lifting baffle 3 between the pyrolysis chamber 1 and the decarbonization chamber 4, the contact area between the two chambers can be reduced, thus reducing the flow of atmosphere from the pyrolysis chamber 1 into the decarbonization chamber 4. Furthermore, when the photovoltaic panel does not require a decarbonization step, the lifting baffle 3 can be fully opened, allowing the decarbonization chamber 4 to be used as the pyrolysis chamber 1, increasing the capacity of the pyrolysis chamber 1 and thus increasing pyrolysis production capacity. The application scenario can be flexibly adjusted.

[0025] By installing pressure sensors in pyrolysis chamber 1 and decarbonization chamber 4 respectively, the gas pressure in pyrolysis chamber 1 and decarbonization chamber 4 can be monitored, providing data for adjusting the pressure control valve of pyrolysis chamber 1 and ensuring that the gas pressure in pyrolysis chamber 1 is greater than the gas pressure in decarbonization chamber 4.

[0026] The entire process of feeding, pyrolysis, decarburization, and discharging of the photovoltaic panel is solved by conveying the trays 6 via the conveyor rollers 5, achieving continuous feeding and ensuring the integrity of the glass plate after pyrolysis.

[0027] It should be noted that a small amount of atmosphere from pyrolysis chamber 1 may enter decarbonization chamber 4, but atmosphere from decarbonization chamber 4 is strictly prohibited from entering pyrolysis chamber 1. When the gas pressure inside pyrolysis chamber 1 is greater than the gas pressure in decarbonization chamber 4 and the external gas pressure, it prevents gases from outside pyrolysis chamber 1 from entering pyrolysis chamber 1. Additionally, when the nitrogen content in decarbonization chamber 4 is high, the atmosphere inside decarbonization chamber 4 can be adjusted through the air inlet 10 and exhaust port.

[0028] In some embodiments, an air curtain mechanism 2 is connected to the lifting baffle 3. The air curtain mechanism 2 has an air inlet and an air outlet. The air curtain mechanism 2 sprays air in a vertical direction, and the resulting air wall separates the pyrolysis chamber 1 and the decarbonization chamber 4. The air inlet of the air curtain mechanism 2 is connected to a nitrogen tank.

[0029] By setting up an air curtain mechanism 2, an air wall is formed between the pyrolysis chamber 1 and the decarbonization chamber 4, which further prevents the atmosphere in the decarbonization chamber 4 from flowing into the pyrolysis chamber 1. The air source of the air curtain mechanism 2 is the same atmosphere as that in the pyrolysis chamber 1, namely nitrogen, which can maintain the atmosphere in the pyrolysis chamber 1 and also avoid interference to the pyrolysis chamber 1 or the decarbonization chamber 4 if the air curtain mechanism 2 uses other air sources.

[0030] In some embodiments, a fixed baffle 9 connects the decarbonization chamber 4 and the pyrolysis chamber 1. The fixed baffle 9 and the lifting baffle 3 are vertically opposite each other. The lifting baffle 3 moves towards or away from the fixed baffle 9, and the air curtain mechanism 2 sprays air towards the fixed baffle 9. A space is left between the lifting baffle 3 and the fixed baffle 9 for the conveyor roller 5, the tray 6, and the photovoltaic panel to pass through. This can further reduce the contact area between the pyrolysis chamber 1 and the decarbonization chamber 4, reduce the flow of atmosphere from the pyrolysis chamber 1 into the decarbonization chamber 4, and at the same time, it will not hinder the normal passage of the conveyor roller 5, the tray 6, and the photovoltaic panel.

[0031] In some embodiments, the fixed baffle 9 is provided with an auxiliary air curtain mechanism 8, which has an air inlet and an air outlet. The air outlet direction of the auxiliary air curtain mechanism 8 is opposite to that of the air curtain mechanism 2, and the air inlet of the auxiliary air curtain mechanism 8 is connected to a nitrogen tank. This can increase the gas injection density and improve the atmosphere barrier capability.

[0032] In some embodiments, the air curtain mechanism 2 and the auxiliary air curtain mechanism 8 are located on the pyrolysis chamber side.

[0033] In some embodiments, the lifting baffle 3 is located above the fixed baffle 9.

[0034] In some embodiments, the height of the fixed baffle 9 is less than half the height of the pyrolysis chamber 1. Positioning the fixed baffle 9 between two adjacent conveyor rollers in the conveyor roller conveyor 5 further reduces the contact area between the pyrolysis chamber 1 and the decarburization chamber 4. It should be noted that the horizontal height of the conveyor rollers is usually less than half the height of the pyrolysis chamber 1 to provide sufficient space for placing items above the conveyor roller conveyor 5.

[0035] In some embodiments, the pyrolysis gas outlet of the pyrolysis chamber 1 is connected to the combustion chamber, and the exhaust port of the combustion chamber is connected to the exhaust gas treatment system. The pyrolysis gas generated in the combustion chamber can be reused as fuel. After combustion in the combustion chamber, the generated exhaust gas is purified by the exhaust gas treatment system before being discharged into the atmosphere, thus avoiding environmental pollution.

[0036] In some embodiments, the air curtain mechanism 2 and the housing of the pyrolysis chamber 1 are slidably sealed. This ensures the airtightness of the pyrolysis chamber 1 during the raising and lowering of the air curtain, preventing external gases from entering the pyrolysis chamber 1.

[0037] It should be noted that the sliding seal structure adopts a conventional sliding seal structure, which will not be described in detail here.

[0038] In some embodiments, an oxygen sensor is connected inside the pyrolysis chamber 1, and the oxygen sensor is connected to an alarm located outside the pyrolysis chamber 1. This allows for monitoring of the oxygen content within the pyrolysis chamber 1 to ensure that there is no oxygen inside. If the alarm sounds, it indicates that oxygen is present in the pyrolysis chamber 1, requiring adjustment of the pressure control valve to increase the pressure inside the pyrolysis chamber 1, or shutdown to check the sealing of the pyrolysis chamber 1.

[0039] 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.

[0040] 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.

[0041] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0042] 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.

[0043] 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.

[0044] 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 roller conveyor type pyrolysis device for photovoltaic panel pyrolysis, characterized in that, include: The pyrolysis chamber has a nitrogen inlet and a pyrolysis gas outlet. The nitrogen inlet of the pyrolysis chamber is connected to a nitrogen input pipe. A pressure control valve is connected to the nitrogen input pipe to control the gas pressure in the pyrolysis chamber to be greater than or equal to the gas pressure in the decarbonization chamber. The pyrolysis chamber is equipped with a first pressure sensor. The decarbonization chamber has an air inlet and an exhaust outlet. A lifting baffle connects the decarbonization chamber and the pyrolysis chamber. A hydraulic mechanism drives the lifting baffle to move vertically. The lifting height of the baffle is adjusted according to the specifications of the photovoltaic panels. The decarbonization chamber is equipped with a second pressure sensor. An air curtain mechanism is connected to the lifting baffle. The air curtain mechanism has an air inlet and an exhaust outlet. The air curtain mechanism exhausts air vertically, forming an air wall that separates the pyrolysis chamber and the decarbonization chamber. The air inlet of the air curtain mechanism is connected to a nitrogen tank. A fixed connection is provided between the decarbonization chamber and the pyrolysis chamber. A baffle is provided, wherein the fixed baffle and the lifting baffle are vertically opposite each other, the lifting baffle moves toward or away from the fixed baffle, and the air curtain mechanism sprays air toward the fixed baffle; the fixed baffle is provided with an auxiliary air curtain mechanism, the auxiliary air curtain mechanism has an air inlet and an air outlet, the air spray direction of the auxiliary air curtain mechanism is opposite to the air spray direction of the fixed baffle mechanism, and the air inlet of the auxiliary air curtain mechanism is connected to a nitrogen tank; the air curtain mechanism and the auxiliary air curtain mechanism are located on the pyrolysis chamber side; the height of the fixed baffle is less than half the height of the pyrolysis chamber; A conveyor roller conveyor runs horizontally through the pyrolysis chamber and the decarbonization chamber. The conveyor roller conveyor is equipped with a tray for carrying photovoltaic panels. A space is left between the lifting baffle and the fixed baffle for the conveyor roller conveyor, the tray and the photovoltaic panels to pass through.

2. The roller conveyor pyrolysis device for photovoltaic panel pyrolysis according to claim 1, characterized in that, The lifting baffle is located above the fixed baffle.

3. The roller conveyor pyrolysis device for photovoltaic panel pyrolysis according to claim 1, characterized in that, The pyrolysis gas outlet of the pyrolysis chamber is connected to the combustion chamber, and the exhaust port of the combustion chamber is connected to the exhaust gas treatment system.

4. The roller conveyor pyrolysis device for photovoltaic panel pyrolysis according to claim 1, characterized in that, The air curtain mechanism is slidably sealed to the shell of the pyrolysis chamber.

5. The roller conveyor pyrolysis device for photovoltaic panel pyrolysis according to claim 1, characterized in that, An oxygen sensor is connected to the pyrolysis chamber, and the oxygen sensor is connected to an alarm located outside the pyrolysis chamber.

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