Pyrolysis and decarburization integrated furnace system suitable for waste photovoltaic laminated parts

Abstract

The pyrolysis and decarburization integrated furnace system comprises a furnace end atmosphere replacement chamber, a pyrolysis cavity, a decarburization cavity, a furnace tail atmosphere replacement chamber, a cooling cavity, a conveying roller way and a heating system, the decarburization cavity is provided with an air inlet and a nitrogen inlet, and the pyrolysis cavity and the decarburization cavity are spaced through a fourth gate; the transmission roller way sequentially penetrates through the furnace end atmosphere replacement chamber, the pyrolysis cavity, the decarburization cavity, the furnace tail atmosphere replacement chamber and the cooling cavity in the horizontal direction, and the transmission roller way is suitable for conveying waste photovoltaic laminated parts. According to the invention, the decarburization cavity can be used for pyrolysis operation and decarburization operation. And by arranging the furnace end atmosphere replacement chamber and the furnace tail atmosphere replacement chamber, the atmosphere in the furnace can be separated from the outside, and the outside atmosphere is prevented from entering the furnace to influence the pyrolysis process.

Description

Technical Field

[0001] This invention relates to the field of waste photovoltaic module recycling technology, and in particular to an integrated thermal decarbonization furnace system suitable for waste photovoltaic laminates. Background Technology

[0002] Generally, photovoltaic (PV) modules have a lifespan of 25 to 30 years. As they age, a large number of expired or damaged PV modules urgently require safe disposal. PV modules consist of an aluminum frame and a photovoltaic laminate, which primarily comprises tempered glass, solar cells, and organic materials (encapsulant film and backsheet). Currently, the recycling and processing of retired PV modules involves two main steps: first, module disassembly, primarily involving the disassembly of the aluminum frame and junction box, removal of the EVA film, separation of the backsheet and glass; second, component separation, mainly separating silicon, silver, and aluminum from the cells, and copper, tin, and lead from the solder strips. The copper content in the solder strips is typically 85-90%. Lead and tin mainly come from the coating; both are toxic elements, while copper is a metal with high recycling value.

[0003] Currently, the processing of photovoltaic modules typically involves two steps: pyrolysis and decarbonization. The purpose of pyrolysis is to decompose the organic matter in the photovoltaic modules. Some organic components, after pyrolysis, form coke, which may adhere to glass, crystalline silicon solar cells, etc. To recover clean glass sheets, further oxidation and decarbonization treatment is required. However, some organic components in photovoltaic modules do not exhibit severe adhesion after pyrolysis, thus requiring no decarbonization treatment. Even if adhesion occurs, it may not significantly affect the products to be recovered, also necessitating decarbonization. Currently, there is no integrated pyrolysis and decarbonization furnace system that can function as a pyrolysis furnace when decarbonization is not required. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide an integrated pyrolysis and decarburization furnace system suitable for waste photovoltaic laminates, which allows the decarburization chamber to be used as a pyrolysis chamber when decarburization treatment is not required for the waste photovoltaic laminates.

[0005] This invention proposes an integrated pyrolysis and decarbonization furnace system suitable for waste photovoltaic laminates, comprising: a furnace head atmosphere replacement chamber, a pyrolysis chamber, a decarbonization chamber, a furnace tail atmosphere replacement chamber, a cooling chamber, a conveyor roller and a heating system. The furnace head atmosphere replacement chamber has a feed inlet and a discharge outlet at its two ends in the horizontal direction, respectively. A first gate is connected to the feed inlet of the furnace head atmosphere replacement chamber, and a second gate is connected to the discharge outlet of the furnace head atmosphere replacement chamber. The furnace head atmosphere replacement chamber has a first nitrogen inlet and an air outlet.

[0006] The pyrolysis chamber has an inlet and an outlet at its two ends in the horizontal direction. The inlet of the pyrolysis chamber is connected to a third gate, and the outlet of the pyrolysis chamber is connected to a fourth gate. The pyrolysis chamber has a second nitrogen inlet and a pyrolysis gas outlet, and the pyrolysis gas outlet is connected to a pyrolysis gas treatment device.

[0007] The decarbonization chamber is arranged horizontally. The feed end of the decarbonization chamber is connected to the discharge end of the pyrolysis chamber. The pyrolysis chamber and the decarbonization chamber are separated by a fourth gate. The discharge end of the decarbonization chamber is connected to a fifth gate. The decarbonization chamber has an air inlet, a third nitrogen inlet and an exhaust gas outlet. The exhaust gas outlet is connected to an exhaust gas treatment device or a pyrolysis gas treatment device.

[0008] The furnace tail atmosphere replacement chamber has a feed inlet and a discharge outlet at its two ends in the horizontal direction. The feed inlet of the furnace tail atmosphere replacement chamber is connected to the sixth gate, and the discharge outlet of the furnace tail atmosphere replacement chamber is connected to the seventh gate. The furnace tail atmosphere replacement chamber has a fourth nitrogen inlet, an air inlet, and an air outlet. The first nitrogen inlet, the second nitrogen inlet, the third nitrogen inlet, and the fourth nitrogen inlet are respectively connected to nitrogen gas sources.

[0009] The cooling chamber is arranged horizontally. The feed end of the cooling chamber is connected to the discharge end of the furnace tail atmosphere replacement chamber. The furnace tail atmosphere replacement chamber and the cooling chamber are separated by a seventh gate. The tail end of the cooling chamber is connected to an eighth gate. The cooling chamber has an air inlet and an air outlet. The air inlet is connected to a blower through an air duct. The first gate, second gate, third gate, fourth gate, fifth gate, sixth gate, seventh gate and eighth gate are electrically connected to the gate controller. The gate controller is electrically connected to the operation panel. The opening and closing of each gate is controlled by the operation panel.

[0010] The conveyor rollers run horizontally through the furnace head atmosphere replacement chamber, pyrolysis chamber, decarburization chamber, furnace tail atmosphere replacement chamber and cooling chamber. The conveyor rollers are suitable for conveying waste photovoltaic laminates.

[0011] The heating system is connected to the pyrolysis chamber and the decarbonization chamber respectively, and controls the temperature of the pyrolysis chamber and the decarbonization chamber.

[0012] In some embodiments, both the pyrolysis chamber and the decarburization chamber are constructed using a metal frame and high-alumina insulating bricks. The outer layer of the high-alumina insulating bricks is covered with thermal insulation cotton, and the tops of both the pyrolysis chamber and the decarburization chamber are arched structures.

[0013] In some embodiments, the air outlet of the cooling chamber is connected to the air inlet of the cooling chamber through a circulating air duct to form a circulating air field.

[0014] In some embodiments, a waste discharge hood is connected to the pyrolysis gas outlet, and a number of guide plates arranged side by side are connected inside the waste discharge hood.

[0015] In some embodiments, the conveyor rollers of different chambers are independently controlled, and the conveyor rollers include multiple rollers arranged at equal intervals, with a roller spacing of ≤160mm.

[0016] In some embodiments, a furnace head transition cavity is provided between the second gate and the third gate, and a furnace tail transition cavity is provided between the fifth gate and the sixth gate.

[0017] In some embodiments, the furnace head transition cavity and the furnace tail transition cavity are respectively provided with an observation window and a maintenance window.

[0018] In some embodiments, nitrogen curtain devices are respectively provided at the first gate, the second gate, the third gate, the fourth gate, and the fifth gate, and the nitrogen curtain devices are connected to a nitrogen source.

[0019] In some embodiments, the heating system includes a temperature controller, a thermocouple, a heating wire, and a ceramic tube. The heating wire is respectively arranged inside the pyrolysis chamber and the decarburization chamber. The heating wires in the pyrolysis chamber and the decarburization chamber are respectively connected to the temperature controller. The temperature of the pyrolysis chamber and the decarburization chamber is controlled by the temperature controller. The heating wire is located inside the ceramic tube. The thermocouple is respectively connected inside the pyrolysis chamber and the decarburization chamber. The thermocouple is electrically connected to the temperature controller.

[0020] In some embodiments, the heating wire is made of nickel-chromium alloy. Attached Figure Description

[0021] 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.

[0022] in:

[0023] Figure 1 This is a schematic diagram of the integrated thermal decarbonization furnace system for waste photovoltaic laminates in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the waste discharge hood.

[0025] Figure 3 This is a flowchart illustrating the use of the integrated thermal decarbonization furnace system for waste photovoltaic laminates in this invention embodiment.

[0026] Figure label:

[0027] 1. Conveyor roller conveyor; 2. Furnace head atmosphere replacement chamber; 3. Furnace head transition chamber; 4. Pyrolysis chamber; 41. Pyrolysis gas outlet; 5. Decarbonization chamber; 6. Furnace tail transition chamber; 7. Furnace tail atmosphere replacement chamber; 8. Cooling chamber; 9. Waste discharge hood; 10. Guide plate. Detailed Implementation

[0028] 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.

[0029] The following description, with reference to the accompanying drawings, describes an embodiment of the present invention of an integrated thermal decarbonization furnace system suitable for waste photovoltaic laminates.

[0030] like Figure 1-2 As shown in the figure, this embodiment of the invention proposes an integrated pyrolysis and decarbonization furnace system suitable for waste photovoltaic laminates, including: a furnace head atmosphere replacement chamber 2, a pyrolysis chamber 4, a decarbonization chamber 5, a furnace tail atmosphere replacement chamber 7, a cooling chamber 8, a conveyor roller 1, and a heating system. The furnace head atmosphere replacement chamber 2 has a feed inlet and a discharge outlet at its two ends in the horizontal direction, respectively. A first gate is connected to the feed inlet of the furnace head atmosphere replacement chamber 2, and a second gate is connected to the discharge outlet of the furnace head atmosphere replacement chamber 2. The furnace head atmosphere replacement chamber 2 has a first nitrogen inlet and an air outlet.

[0031] The pyrolysis chamber 4 has an inlet and an outlet at its two ends in the horizontal direction. The inlet of the pyrolysis chamber 4 is connected to a third gate, and the outlet of the pyrolysis chamber 4 is connected to a fourth gate. The pyrolysis chamber 4 has a second nitrogen inlet and a pyrolysis gas outlet 41, and the pyrolysis gas outlet 41 is connected to a pyrolysis gas treatment device.

[0032] The decarbonization chamber 5 is arranged horizontally. The feed end of the decarbonization chamber 5 is connected to the discharge end of the pyrolysis chamber 4. The pyrolysis chamber 4 and the decarbonization chamber 5 are separated by a fourth gate. The discharge end of the decarbonization chamber 5 is connected to a fifth gate. The decarbonization chamber 5 has an air inlet, a third nitrogen inlet and a waste gas outlet. The waste gas outlet is connected to a waste gas treatment device or a pyrolysis gas treatment device.

[0033] The tail atmosphere replacement chamber 7 has a feed inlet and a discharge outlet at its two ends in the horizontal direction. The feed inlet of the tail atmosphere replacement chamber 7 is connected to the sixth gate, and the discharge outlet of the tail atmosphere replacement chamber 7 is connected to the seventh gate. The tail atmosphere replacement chamber 7 has a fourth nitrogen inlet, an air inlet, and an air outlet. The first nitrogen inlet, the second nitrogen inlet, the third nitrogen inlet, and the fourth nitrogen inlet are respectively connected to nitrogen gas sources.

[0034] The cooling chamber 8 is arranged horizontally. The feed end of the cooling chamber 8 is connected to the discharge end of the furnace tail atmosphere replacement chamber 7. The furnace tail atmosphere replacement chamber 7 and the cooling chamber 8 are separated by a seventh gate. The tail end of the cooling chamber 8 is connected to an eighth gate. The cooling chamber 8 has an air inlet and an air outlet. The air inlet is connected to a blower through an air duct. The first gate, second gate, third gate, fourth gate, fifth gate, sixth gate, seventh gate and eighth gate are electrically connected to the gate controller. The gate controller is electrically connected to the operation panel. The opening and closing of each gate is controlled by the operation panel.

[0035] The conveyor roller 1 passes through the furnace head atmosphere replacement chamber 2, pyrolysis chamber 4, decarburization chamber 5, furnace tail atmosphere replacement chamber 7 and cooling chamber 8 in a horizontal direction. The conveyor roller 1 is suitable for conveying waste photovoltaic laminates.

[0036] The heating system is connected to the pyrolysis chamber 4 and the decarbonization chamber 5 respectively, and controls the temperature of the pyrolysis chamber 4 and the decarbonization chamber 5.

[0037] This invention, in this embodiment, connects an openable and closable gate between the pyrolysis chamber 4 and the decarburization chamber 5, and provides an air inlet and a nitrogen inlet on the decarburization chamber 5, allowing the decarburization chamber 5 to perform both pyrolysis and decarburization operations. When the photovoltaic laminate does not require decarburization, the air inlet is closed, and the third nitrogen inlet is opened to introduce nitrogen into the decarburization chamber 5. When decarburization is required, the third nitrogen inlet is closed, and the air inlet is opened.

[0038] By setting up the furnace head atmosphere replacement chamber 2 and the furnace tail atmosphere replacement chamber 7, the atmosphere inside the furnace can be isolated from the outside, preventing the outside atmosphere from entering the furnace and affecting the pyrolysis process.

[0039] It should be noted that the air inlet can also be connected to an oxygen source.

[0040] Furthermore, the first nitrogen inlet of the furnace head atmosphere replacement chamber 2 and the fourth nitrogen inlet of the furnace tail atmosphere replacement chamber 7 are both large-diameter inlets and are connected to large-diameter pipelines to ensure that nitrogen replacement is completed in a short time and to ensure the stable operation of the system.

[0041] Furthermore, the furnace head atmosphere replacement chamber 2 and the furnace tail atmosphere replacement chamber 7 are respectively equipped with an accident handling port and a waste handling port.

[0042] Furthermore, multiple trays can be installed on the conveyor roller 1 for conveying waste photovoltaic laminates.

[0043] Furthermore, the pyrolysis gas treatment device includes a secondary combustion chamber, a slow cooling tower, an alkaline spraying device, an alkaline absorption device, and an exhaust fan connected in sequence.

[0044] Furthermore, the nitrogen source can be a nitrogen cylinder or a nitrogen generator, and a gas pump and a flow regulating valve can be installed on the delivery pipeline.

[0045] In some embodiments, both the pyrolysis chamber 4 and the decarburization chamber 5 are constructed using a metal frame and high-alumina insulating bricks. The outer layer of the high-alumina insulating bricks is covered with insulating cotton, and the tops of both the pyrolysis chamber 4 and the decarburization chamber 5 are arched structures.

[0046] High-alumina insulating bricks possess excellent thermal insulation, thermal stability, and thermal shock resistance. Their use helps prevent the erosion of the furnace body by volatile organic compounds. The outer layer of these bricks contains aluminum silicate fibers, which provide good insulation, effectively reducing the thickness of the kiln walls and lowering the outer surface temperature of the furnace body, thus contributing to energy conservation and cost reduction. By laying insulating cotton on top of the high-alumina insulating bricks, the temperature of the furnace body's outer wall can be kept low.

[0047] In some embodiments, the air outlet of the cooling chamber 8 is connected to the air inlet of the cooling chamber 8 through a circulating air duct to form a circulating air field.

[0048] Furthermore, the blower of cooling chamber 8 is connected to a refrigeration unit.

[0049] In some embodiments, such as Figure 2 As shown, a waste exhaust hood 9 is connected to the pyrolysis gas outlet 41, and several guide plates 10 arranged side by side are connected inside the waste exhaust hood 9. This makes the pyrolysis gas flow more uniform across the cross-section of the pyrolysis chamber 4 and reduces the lateral temperature difference.

[0050] In some embodiments, the conveyor rollers 1 of different chambers are independently controlled. The conveyor rollers 1 include multiple rollers arranged at equal intervals, with a roller spacing of ≤160mm. This allows for flexible and stable speed adjustment of the conveyor rollers 1 of each chamber.

[0051] In some embodiments, a furnace head transition cavity 3 is provided between the second gate and the third gate, and a furnace tail transition cavity 6 is provided between the fifth gate and the sixth gate. This can further prevent atmosphere cross-flow.

[0052] In some embodiments, the furnace head transition cavity 3 and the furnace tail transition cavity 6 are respectively provided with an observation window and a maintenance window.

[0053] In some embodiments, nitrogen gas curtain devices are respectively provided at the first gate, second gate, third gate, fourth gate, and fifth gate, and the nitrogen gas curtain devices are connected to a nitrogen gas source. This ensures that the nitrogen atmosphere is not mixed with other gases during pyrolysis.

[0054] In some embodiments, the heating system includes a temperature controller, a thermocouple, a heating wire, and a ceramic tube. The heating wire is respectively arranged inside the pyrolysis chamber 4 and the decarburization chamber 5. The heating wires of the pyrolysis chamber 4 and the decarburization chamber 5 are respectively connected to the temperature controller. The temperature of the pyrolysis chamber 4 and the decarburization chamber 5 is controlled by the temperature controller. The heating wire is located inside the ceramic tube. The thermocouple is respectively connected inside the pyrolysis chamber 4 and the decarburization chamber 5. The thermocouple is electrically connected to the temperature controller.

[0055] Thermocouples monitor the temperature of pyrolysis chamber 4 and decarbonization chamber 5 and feed the temperature data back to the temperature controller. The temperature controller adjusts the temperature of pyrolysis chamber 4 and decarbonization chamber 5 according to the feedback temperature data.

[0056] In some embodiments, the heating wire is made of nickel-chromium alloy. It has good high temperature resistance and corrosion resistance, low resistivity, can operate stably at high temperatures of 1200℃, generates a large amount of heat with a small size, has significant energy-saving effect, and uniform heat distribution.

[0057] like Figure 3 As shown, the process flow of the integrated thermal decarbonization furnace system for waste photovoltaic laminates according to an embodiment of the present invention includes:

[0058] (1) Feeding: The photovoltaic modules are placed on the tray, and the tray is then placed on the feeding roller section of the conveyor roller 1. After placement, the first gate of the furnace atmosphere replacement chamber 2 is opened, and the conveyor roller 1 runs at high speed, quickly moving the tray into the furnace atmosphere replacement chamber 2. The first gate is then closed. The feeding roller section waits for the next feeding cycle.

[0059] (2) Nitrogen replacement: After the tray quickly moves to the furnace head atmosphere replacement chamber 2, the first gate closes and the conveyor roller 1 of the furnace head replacement chamber stops running (or swings) to carry out nitrogen replacement. After the nitrogen replacement is completed and after waiting for the conveyor roller 1 of the furnace head transition chamber 3 to switch to high-speed operation, the second gate of the furnace head atmosphere replacement chamber 2 opens and the tray quickly enters the furnace head transition chamber 3. After the tray is fully entered into the furnace head transition chamber 3, the second gate closes and the first gate opens, and the furnace head atmosphere replacement chamber 2 enters the next receiving cycle.

[0060] (3) Transition: After the photovoltaic module has completely entered the furnace head transition chamber 3, the transmission roller 1 of the furnace head transition chamber 3 slows down to the same speed as the transmission roller 1 of the pyrolysis chamber 4. The third gate opens, and the photovoltaic module runs smoothly into the pyrolysis chamber 4. After the photovoltaic module completely leaves the furnace head transition chamber 3, the speed of the furnace head transition chamber 3 increases and enters the next receiving cycle.

[0061] (4) Pyrolysis: The photovoltaic module is heated in the pyrolysis chamber 4. The EVA and backsheet polymer in the photovoltaic module are pyrolyzed at a high temperature of 500-800℃ (the whole process is an oxygen-free pyrolysis process, equipped with an oxygen content detector). After the photovoltaic module is pyrolyzed in the pyrolysis chamber 4, the fourth gate is opened and the module is automatically transported to the decarbonization chamber 5 for decarbonization under the transport of the conveyor roller 1. The generated pyrolysis gas is sent to the pyrolysis gas treatment device.

[0062] (5) Decarbonization: The decarbonization chamber 5 operates at a temperature range of 600-800℃, ensuring the clean combustion and volatilization of carbon on the surface of the photovoltaic modules. The internal atmosphere of the decarbonization chamber 5 is air (oxygen content 5-21%). A fourth gate for atmosphere isolation is located upstream of the decarbonization chamber 5, and a furnace tail atmosphere replacement chamber 7 is located downstream, achieving atmosphere isolation between the decarbonization chamber 5 and the pyrolysis chamber 4 and cooling chamber 8, thus preventing oxygen and open flame from flowing into the pyrolysis chamber 4 and cooling chamber 8. The exhaust gas from the decarbonization chamber 5 is introduced into an exhaust gas treatment device and then discharged for treatment.

[0063] (6) Transition: After the fifth gate is opened and the photovoltaic module is fully entered into the furnace tail transition chamber 6, the transmission roller 1 of the furnace tail transition chamber 6 speeds up to the same speed as the furnace tail atmosphere replacement chamber 7. After the photovoltaic module is quickly moved and fully entered the furnace tail atmosphere replacement chamber 7, the sixth gate of the furnace tail atmosphere replacement chamber 7 is closed, the transmission roller 1 of the furnace tail transition chamber 6 slows down, and continues to receive the next set of photovoltaic modules, entering the next material receiving cycle.

[0064] (7) Replacement: After the photovoltaic module has completely entered the furnace tail atmosphere replacement chamber 7, the sixth gate of the furnace tail atmosphere replacement chamber 7 is closed and the seventh gate is opened. The conveyor roller 1 of the furnace tail atmosphere replacement chamber 7 slows down. After the photovoltaic module has been completely transferred to the cooling chamber 8, the seventh gate is closed and nitrogen replacement is carried out. After the nitrogen replacement is completed, the sixth gate is opened and the photovoltaic module continues to wait for the next cycle.

[0065] (8) Cooling: There is no heating device in the cooling chamber 8. The photovoltaic module is slowly cooled by the air-cooled pipeline structure. The cooling chamber 8 is equipped with an air outlet, which is connected to the exhaust gas treatment device through pipeline to ensure that the heat exchange air in the cooling chamber 8 does not leak into the workshop. Control valves are provided at both the air inlet and the air outlet, which can be flexibly adjusted during use. The temperature at the outlet of the cooling chamber 8 is ≤180℃.

[0066] (9) Discharge: The processed photovoltaic modules are transferred to the outside of the furnace by connecting the discharge roller table section with the pallet transfer vehicle.

[0067] (10) Transfer: The system is equipped with multiple pallet transfer vehicles. The pallet transfer vehicles have a universal wheel structure. After receiving the pallet, they can be transported to other unloading areas for unloading operations.

[0068] (11) After unloading is completed, the transfer vehicle will move to the front of the feed roller table and wait to enter the next feeding cycle.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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 pyrolytic decarburization integrated furnace system suitable for waste photovoltaic laminates, characterized by, The application relates to a waste photovoltaic laminated material treatment device. The waste photovoltaic laminated material treatment device comprises a furnace head atmosphere replacement chamber, a pyrolysis cavity, a decarburization cavity, a furnace tail atmosphere replacement chamber and a cooling cavity. The furnace head atmosphere replacement chamber is connected with a first gate at an inlet end, and connected with a second gate at an outlet end. The pyrolysis cavity is connected with a third gate at an inlet end, and connected with a fourth gate at an outlet end. The decarburization cavity is connected with a fifth gate at an outlet end. The furnace tail atmosphere replacement chamber is connected with a sixth gate at an inlet end, and connected with a seventh gate at an outlet end. The cooling cavity is connected with an eighth gate at an outlet end. The waste photovoltaic laminated material treatment device further comprises a transmission roller way, a heating system and a nitrogen source.

2. The pyrolytic decarburization integrated furnace system suitable for waste photovoltaic laminates according to claim 1, characterized in that, The transmission roller way is arranged in the furnace head atmosphere replacement chamber, the pyrolysis cavity, the decarburization cavity, the furnace tail atmosphere replacement chamber and the cooling cavity in sequence.

3. The pyrolytic decarburization integrated furnace system suitable for waste photovoltaic laminates according to claim 1, characterized in that, The heating system controls the temperature of the pyrolysis cavity and the decarburization cavity.

4. The integrated pyrolytic decarburization furnace system suitable for waste photovoltaic laminates according to claim 1, characterized in that, The pyrolysis cavity and the decarburization cavity are both made of a metal frame and high-aluminum heat insulation bricks. The outer layer of the high-aluminum heat insulation bricks is paved with thermal insulation cotton. The top of the pyrolysis cavity and the decarburization cavity are both in a dome structure. The outlet of the cooling cavity is connected with the inlet of the cooling cavity through a circulating air duct to form a circulating air field. The pyrolysis gas outlet is connected with a waste exhaust hood. The waste exhaust hood is connected with a plurality of guide plates arranged side by side.

5. The integrated pyrolytic decarburization furnace system suitable for waste photovoltaic laminates of claim 1, wherein, The transmission roller tables of different chambers are independently controlled, and each transmission roller table comprises a plurality of equidistantly arranged roller bars with a distance of less than or equal to 160 mm.

6. The integrated pyrolytic decarburization furnace system suitable for waste photovoltaic laminates of claim 1, wherein, A furnace head transition chamber is arranged between the second gate and the third gate, and a furnace tail transition chamber is arranged between the fifth gate and the sixth gate.

7. The integrated pyrolytic decarburization furnace system suitable for waste photovoltaic laminates of claim 1, wherein, The furnace head transition chamber and the furnace tail transition chamber are respectively provided with an observation window and a maintenance window.

8. The integrated pyrolytic decarburization furnace system for waste photovoltaic laminates of claim 1, wherein, Nitrogen gas curtain devices are respectively arranged at the first gate, the second gate, the third gate, the fourth gate and the fifth gate, and the nitrogen gas curtain devices are connected to a nitrogen gas source.

9. The integrated pyrolytic decarburization furnace system suitable for waste photovoltaic laminates of claim 1, wherein, The heating system comprises a temperature controller, thermocouples, heating wires and ceramic tubes, the heating wires are respectively arranged in the pyrolysis chamber and the decarburization chamber, the heating wires in the pyrolysis chamber and the decarburization chamber are respectively connected to the temperature controller, the temperature of the pyrolysis chamber and the decarburization chamber is respectively controlled by the temperature controller, the heating wires are arranged in the ceramic tubes, the pyrolysis chamber and the decarburization chamber are respectively connected to the thermocouples, and the thermocouples are electrically connected to the temperature controller.

10. The integrated pyrolytic decarburization furnace system suitable for waste photovoltaic laminates according to claim 9, characterized in that, The material of the heating wires is nickel-chromium alloy.

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