Roller way conveying type pyrolysis device for photovoltaic panel pyrolysis

Abstract

The roller way conveying type pyrolysis device comprises a pyrolysis chamber, a decarburization chamber, an air curtain mechanism and a conveying roller way, the pyrolysis chamber is provided with a nitrogen inlet and a pyrolysis gas outlet, the nitrogen inlet of the pyrolysis chamber is connected with a nitrogen input pipe, the nitrogen input pipe is connected with a pressure control valve, and the pressure control valve is connected with the pyrolysis gas outlet. The air pressure in the pyrolysis chamber is greater than or equal to that in the decarbonization chamber; the decarbonization chamber is provided with an air inlet and an exhaust port, a lifting baffle is connected between the decarbonization chamber and the pyrolysis chamber, and the air curtain mechanism is connected to the lifting baffle; the conveying roller way penetrates through the pyrolysis chamber and the decarbonization chamber in the horizontal direction, and a tray used for bearing the photovoltaic panel is arranged on the conveying roller way. According to the invention, continuous feeding can be realized, atmosphere in the decarburization chamber is prevented from flowing into the pyrolysis chamber, external air is also prevented from entering the pyrolysis chamber, atmosphere doping in the pyrolysis chamber during continuous feeding is prevented, and the pyrolysis degree of the photovoltaic panel is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic panel recycling and processing, and in particular to a roller conveyor type pyrolysis device for pyrolysis of photovoltaic panels. Background Art

[0002] Photovoltaic modules are generally composed of aluminum frames, junction boxes, tempered glass, EVA film crystalline silicon cells and TPT backboards. Whole photovoltaic panels refer to the tempered glass panels (whole panels), EVA film crystalline silicon cells and TPT backboards after the aluminum frames and junction boxes are separated from the photovoltaic modules. Used photovoltaic panels can be processed through the pyrolysis system to recycle the glass panels and silicon wafers.

[0003] Continuous feeding cannot be achieved in the existing pyrolysis system. This is because the pyrolysis chamber needs to be operated in an oxygen-free atmosphere when pyrolyzing the photovoltaic panel, and the decarbonization chamber needs to be operated in an oxygen atmosphere or air when decarbonizing the photovoltaic panel. Usually, the pyrolysis chamber and the decarbonization chamber are connected and separated by a sealed door. When the next photovoltaic panel enters the pyrolysis chamber, the sealed door at the entrance of the pyrolysis chamber needs to be opened, which will inevitably bring the outside air into the pyrolysis chamber and destroy the oxygen-free atmosphere of the pyrolysis chamber. Moreover, when the previous photovoltaic panel enters the decarbonization chamber after pyrolysis, the sealed door at the exit of the pyrolysis chamber needs to be opened, which will also replace the air in the decarbonization chamber into the pyrolysis chamber. If there is oxygen or other gas doping during the pyrolysis process, it will affect the degree of pyrolysis completion and will also be dangerous. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, an embodiment of the present invention provides a roller conveyor pyrolysis device for pyrolysis of photovoltaic panels, which can realize continuous feeding, prevent other atmospheres from being mixed in the pyrolysis chamber, and ensure the completion degree of pyrolysis of photovoltaic panels.

[0005] An embodiment of the present invention proposes a roller conveyor pyrolysis device for pyrolysis of photovoltaic panels, comprising: a pyrolysis chamber, a decarbonization chamber and a conveying roller, the pyrolysis chamber having a nitrogen inlet and a pyrolysis gas outlet, the nitrogen inlet of the pyrolysis chamber being connected to a nitrogen input pipe, the nitrogen input pipe being connected to a pressure control valve to control the air pressure in the pyrolysis chamber to be greater than or equal to the air pressure in the decarbonization chamber, the pyrolysis chamber being provided with a first pressure sensor; the decarbonization chamber having an air inlet and an exhaust port, a lifting baffle being connected between the decarbonization chamber and the pyrolysis chamber, a hydraulic mechanism driving the lifting baffle to move in a vertical direction, the lifting height of the lifting baffle being adjusted according to the specifications of the photovoltaic panel, the decarbonization chamber being provided with a second pressure sensor; the conveying roller passes through the pyrolysis chamber and the decarbonization chamber in a horizontal direction, and a tray for carrying the photovoltaic panel is provided on the conveying roller.

[0006] In some embodiments, the lifting baffle is connected to an air curtain mechanism, which has an air inlet and an air outlet. The air curtain mechanism sprays air in a vertical direction, and the formed air wall separates the pyrolysis chamber from 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 to 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 conveying rollers, pallets and photovoltaic panels to pass through.

[0008] In some embodiments, an auxiliary air curtain mechanism is provided on the fixed baffle, the auxiliary air curtain mechanism has an air inlet and an air jet, the jet direction of the auxiliary air curtain mechanism is opposite to the jet direction 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 arranged 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 gas curtain mechanism is slidingly sealed to the shell 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, which is arranged outside the pyrolysis chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[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 It is a structural schematic diagram of a roller conveyor type pyrolysis device for pyrolysis of photovoltaic panels in an embodiment of the present invention;

[0018] Reference numerals:

[0019] 1. Pyrolysis chamber; 2. Air curtain mechanism; 3. Lifting baffle; 4. Decarbonization chamber; 5. Conveying roller; 6. Tray; 7. Nitrogen inlet; 8. Auxiliary air curtain mechanism; 9. Fixed baffle; 10. Air inlet. DETAILED DESCRIPTION

[0020] 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 roller conveyor type pyrolysis device for pyrolysis of photovoltaic panels according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0022] like Figure 1 As shown, an embodiment of the present invention proposes a roller conveyor pyrolysis device for pyrolysis of photovoltaic panels, comprising: a pyrolysis chamber 1, a decarbonization chamber 4 and a conveying roller 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, a pressure control valve is connected to the nitrogen input pipe to control the air pressure in the pyrolysis chamber 1 to be greater than or equal to the air pressure in the decarbonization chamber 4, the pyrolysis chamber 1 is provided 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 in a vertical direction, the lifting height of the lifting baffle 3 is adjusted according to the specifications of the photovoltaic panel, and the decarbonization chamber 4 is provided with a second pressure sensor; the conveying roller 5 runs through the pyrolysis chamber 1 and the decarbonization chamber 4 in a horizontal direction, and a tray 6 for carrying the photovoltaic panel is provided on the conveying roller 5.

[0023] The embodiment of the present invention sets a pressure control valve on the nitrogen inlet pipe of the pyrolysis chamber 1 to control the air pressure in the pyrolysis chamber 1 to be greater than or equal to the air pressure in the decarbonization chamber 4, thereby preventing the atmosphere in the decarbonization chamber 4 from flowing into the pyrolysis chamber 1, and preventing the outside air from entering the pyrolysis chamber 1, thereby preventing the atmosphere in the pyrolysis chamber 1 from being mixed during continuous feeding, and ensuring the degree of pyrolysis of the photovoltaic panel.

[0024] By setting a lifting baffle 3 between the pyrolysis chamber 1 and the decarbonization chamber 4, the contact area between the pyrolysis chamber 1 and the decarbonization chamber 4 can be reduced, and the flow of the atmosphere in the pyrolysis chamber 1 into the decarbonization chamber 4 can be reduced. Moreover, when the photovoltaic panel does not need to perform the decarbonization step, the lifting baffle 3 can be fully opened, and the decarbonization chamber 4 can be used as the pyrolysis chamber 1, thereby increasing the capacity of the pyrolysis chamber 1 and the pyrolysis capacity, and the use scenario can be flexibly adjusted.

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

[0026] The entire process of loading, pyrolysis, decarbonization and discharging of the entire photovoltaic panel is solved by the conveying roller 5 and the conveying tray 6, so that continuous feeding is realized and the integrity of the glass plate after pyrolysis of the photovoltaic panel can be ensured.

[0027] It should be noted that the atmosphere in the pyrolysis chamber 1 can enter the decarburization chamber 4 in a small amount, but the atmosphere in the decarburization chamber 4 is strictly prohibited from entering the pyrolysis chamber 1. When the air pressure in the pyrolysis chamber 1 is greater than the air pressure in the decarburization chamber 4 and the air pressure outside, the gas outside the pyrolysis chamber 1 can be prevented from entering the pyrolysis chamber 1. In addition, when the nitrogen content in the decarburization chamber 4 is high, the atmosphere in the decarburization chamber 4 can also be adjusted through the air inlet 10 and the exhaust port of the decarburization chamber 4.

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

[0029] By setting up the air curtain mechanism 2, an air wall is formed between the pyrolysis chamber 1 and the decarburization chamber 4, which can further prevent the atmosphere of the decarburization chamber 4 from flowing into the pyrolysis chamber 1. The air source of the air curtain mechanism 2 adopts the same atmosphere as the pyrolysis chamber 1, that is, nitrogen, which can maintain the atmosphere in the pyrolysis chamber 1 and also prevent the air curtain mechanism 2 from using other air sources to interfere with the pyrolysis chamber 1 or the decarburization chamber 4.

[0030] In some embodiments, a fixed baffle 9 is connected between the decarbonization chamber 4 and the pyrolysis chamber 1, and the fixed baffle 9 and the lifting baffle 3 are opposite in the vertical direction, and the lifting baffle 3 moves toward or away from the fixed baffle 9, and the air curtain mechanism 2 sprays air toward the fixed baffle 9, and a space for the conveying roller 5, the tray 6 and the photovoltaic panel to pass is reserved between the lifting baffle 3 and the fixed baffle 9. The contact area between the pyrolysis chamber 1 and the decarbonization chamber 4 can be further reduced, and the atmosphere in the pyrolysis chamber 1 can be reduced from flowing into the decarbonization chamber 4, and at the same time, the normal passage of the conveying roller 5, the tray 6 and the photovoltaic panel will not be hindered.

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

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

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

[0034] In some embodiments, the height of the fixed baffle 9 is less than half the height of the pyrolysis chamber 1. The fixed baffle 9 is placed between two adjacent conveying rollers in the conveying roller 5, which can further reduce the contact area between the pyrolysis chamber 1 and the decarbonization chamber 4. It should be noted that the horizontal height of the conveying roller is usually less than half of the pyrolysis chamber 1 in order to provide sufficient space for placing items above the conveying roller 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, and after combustion in the combustion chamber, the exhaust gas generated is purified by the exhaust gas treatment system and discharged into the atmosphere to avoid environmental pollution.

[0036] In some embodiments, the air curtain mechanism 2 is slidably sealed with the shell of the pyrolysis chamber 1 to ensure the sealing of the pyrolysis chamber 1 during the raising and lowering of the air curtain, thereby preventing external gas from entering the pyrolysis chamber 1 .

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

[0038] In some embodiments, an oxygen sensor is connected to the pyrolysis chamber 1, and the oxygen sensor is connected to an alarm, which is arranged outside the pyrolysis chamber 1. The oxygen content in the pyrolysis chamber 1 can be monitored to ensure that there is no oxygen in the pyrolysis chamber 1. If the alarm sounds, it means that there is oxygen doping in the pyrolysis chamber 1, and it is necessary to adjust the pressure control valve to increase the air pressure in the pyrolysis chamber 1, or shut down the machine to check the sealing of the pyrolysis chamber 1.

[0039] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0044] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A roller conveyor pyrolysis device for pyrolysis of photovoltaic panels, characterized in that: include: A pyrolysis chamber, wherein 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, the nitrogen input pipe is connected to a pressure control valve to control the air pressure in the pyrolysis chamber to be greater than or equal to the air pressure in the decarbonization chamber, and the pyrolysis chamber is provided with a first pressure sensor; A decarbonization chamber, wherein the decarbonization chamber has an air inlet and an exhaust port, a lifting baffle is connected between the decarbonization chamber and the pyrolysis chamber, a hydraulic mechanism drives the lifting baffle to move in a vertical direction, the lifting height of the lifting baffle is adjusted according to the specifications of the photovoltaic panel, and the decarbonization chamber is provided with a second pressure sensor; A conveying roller conveyor runs through the pyrolysis chamber and the decarbonization chamber in a horizontal direction, and a tray for carrying a photovoltaic panel is provided on the conveying roller conveyor.

2. The roller conveyor pyrolysis device for pyrolysis of photovoltaic panels according to claim 1, characterized in that: The lifting baffle is connected to an air curtain mechanism, which has an air inlet and an air outlet. The air curtain mechanism sprays air in a vertical direction to form an air wall that separates the pyrolysis chamber from the decarbonization chamber. The air inlet of the air curtain mechanism is connected to a nitrogen tank.

3. The roller conveyor pyrolysis device for pyrolysis of photovoltaic panels according to claim 2, characterized in that: A fixed baffle is connected between the decarbonization chamber and the pyrolysis chamber. The fixed baffle and the lifting baffle are opposite to 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 reserved between the lifting baffle and the fixed baffle for conveying rollers, trays and photovoltaic panels to pass through.

4. The roller conveyor pyrolysis device for pyrolysis of photovoltaic panels according to claim 3, characterized in that: An auxiliary air curtain mechanism is provided on the fixed baffle, and the auxiliary air curtain mechanism has an air inlet and an air jet. The jet direction of the auxiliary air curtain mechanism is opposite to the jet direction of the air curtain mechanism, and the air inlet of the auxiliary air curtain mechanism is connected to a nitrogen tank.

5. The roller conveyor pyrolysis device for pyrolysis of photovoltaic panels according to claim 4, characterized in that: The air curtain mechanism and the auxiliary air curtain mechanism are arranged on the pyrolysis chamber side.

6. The roller conveyor pyrolysis device for pyrolysis of photovoltaic panels according to claim 3, characterized in that: The lifting baffle is located above the fixed baffle.

7. The roller conveyor pyrolysis device for pyrolysis of photovoltaic panels according to claim 3, characterized in that: The height of the fixed baffle is less than half of the height of the pyrolysis chamber.

8. The roller conveyor pyrolysis device for pyrolysis of photovoltaic panels 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.

9. The roller conveyor type pyrolysis device for pyrolysis of photovoltaic panels according to claim 2, characterized in that: The air curtain mechanism is slidably sealed with the shell of the pyrolysis chamber.

10. The roller conveyor type pyrolysis device for pyrolysis of photovoltaic panels according to claim 1, characterized in that: An oxygen sensor is connected in the pyrolysis chamber, and the oxygen sensor is connected to an alarm, and the alarm is arranged outside the pyrolysis chamber.

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