Pyrolysis recovery equipment

Abstract

The invention discloses pyrolysis recovery equipment which comprises a heating furnace used for heating materials; the first bearing part is used for bearing materials; the heat conduction device is provided with a heat absorption part and a heat release part which are in heat conduction connection, the heat absorption part is located in the heating furnace, and the heat release part extends to the first bearing part; wherein the heat absorption part is used for transferring part of heat in the heating furnace to the heat release part, and the heat release part is used for preheating materials placed in the first bearing part through part of heat. The pyrolysis recovery equipment disclosed by the invention is beneficial to environmental protection, and the energy utilization rate and the thermal decomposition efficiency of the pyrolysis recovery equipment are improved.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic component recycling, and in particular to a pyrolysis recycling device. Background Art

[0002] The service life of photovoltaic modules is about 20 to 25 years. When the service life of photovoltaic modules expires, they are recycled. Discarded photovoltaic modules can be recycled into carbon steel, glass, aluminum, silicon, silver and other materials.

[0003] Since EVA (Ethylene Viny Acetate) hot melt adhesive is used between the glass and silicon cell of the photovoltaic module, some related technologies usually use organic solvents to remove the EVA hot melt adhesive to separate the glass and silicon cell.

[0004] However, as the number of discarded photovoltaic modules increases, the above process will generate a large amount of industrial waste liquid, which then needs to be purified, which is not conducive to improving the economic benefits of recycling. Summary of the invention

[0005] The main purpose of the present invention is to provide a pyrolysis recovery device, aiming to solve the defects of the related art.

[0006] To achieve the above object, the present invention provides a pyrolysis recovery device, which comprises:

[0007] A heating furnace is used to heat the materials;

[0008] A first bearing portion, used for bearing materials;

[0009] A heat conduction device, comprising a heat absorbing part and a heat releasing part which are heat-conductively connected to each other, the heat absorbing part is located in the heating furnace, and the heat releasing part extends to the first bearing part;

[0010] The heat absorbing part is used to transfer part of the heat in the heating furnace to the heat releasing part, and the heat releasing part is used to preheat the material placed on the first supporting part by using part of the heat.

[0011] In some embodiments, the heat absorbing part is a water-cooled radiator, and the heat releasing part is a heat energy recovery device.

[0012] In some embodiments, the pyrolysis recovery device further comprises:

[0013] A first temperature sensing device is arranged in the heating furnace and is used to detect the furnace chamber temperature of the heating furnace;

[0014] The first control device adjusts the cooling liquid circulation speed of the water-cooled radiator according to the furnace cavity temperature detected by the first temperature sensing device.

[0015] In some embodiments, the pyrolysis recovery equipment further includes a second bearing portion, the second bearing portion is used to bear the material out of the furnace, and the first bearing portion is used to bear the material to be put into the furnace.

[0016] In some embodiments, a first air cooling device is disposed on the second carrying portion, and the first air cooling device is used to cool the material placed on the second carrying portion.

[0017] In some embodiments, the pyrolysis recovery device further comprises:

[0018] A frame, used for supporting the heating furnace and the first bearing part;

[0019] The angle adjustment device is arranged on the side of the frame facing away from the heating furnace, and is used to adjust the angle between the frame and the ground.

[0020] In some embodiments, the angle adjustment device includes a first support column and a second support column, one end of the first support column and one end of the second support column are respectively hinged to the side of the frame facing away from the heating furnace, and at least one of the first support column and the second support column is a retractable structure.

[0021] In some embodiments, the heating furnace is provided with a smoke exhaust channel and an air inlet channel connected to the furnace cavity of the heating furnace, an air inlet regulating valve is provided in the air inlet channel, and a smoke gas detection probe is provided in the smoke exhaust channel. The smoke gas detection probe is used to detect the oxygen content in the smoke. The pyrolysis recovery equipment also includes a second control device, which adjusts the air inlet regulating valve according to the oxygen content detected by the smoke gas detection probe.

[0022] In some embodiments, a second air cooling device is disposed on the first carrying portion, and the second air cooling device is used to cool the material placed on the first carrying portion.

[0023] In some embodiments, the pyrolysis recovery device further comprises:

[0024] A second temperature sensing device is arranged in the heating furnace and is used to detect the furnace cavity temperature of the heating furnace;

[0025] The third control device connects or disconnects the heat conduction connection between the heat absorbing part and the heat releasing part according to the furnace cavity temperature detected by the second temperature sensing device.

[0026] Compared with the related art, in the recycling process of photovoltaic modules, the pyrolysis recovery equipment using the technical solution of the present invention can thermally decompose the EVA hot melt adhesive in the photovoltaic modules, thereby more easily separating the glass and silicon cells. Since the thermal decomposition of the EVA hot melt adhesive does not produce industrial waste liquid, it is beneficial to environmental protection.

[0027] In addition, the pyrolysis recovery equipment of the technical solution of the present invention can also use part of the heat in the heating furnace to preheat the photovoltaic components to be thermally decomposed through the heat conduction device, thereby improving the energy utilization rate of the pyrolysis recovery equipment and the thermal decomposition efficiency of the EVA hot melt adhesive. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a pyrolysis recovery device according to an embodiment of the present invention;

[0029] Figure 2 It is a schematic structural diagram of a pyrolysis recovery device according to another embodiment of the present invention.

[0030] Description of Figure Numbers:

[0031] Heating furnace 1; first bearing part 2; second air cooling device 21; heat conducting device 3; heat absorbing part 31; heat releasing part 32; second bearing part 4; first air cooling device 41; frame 51; angle adjusting device 52; first supporting column 521; second supporting column 522; smoke exhaust channel 61; smoke detection probe 611; air inlet channel 62; air inlet regulating valve 621.

[0032] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, top, bottom, side...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0036] In addition, the descriptions involving "first", "second", etc. in the embodiments of the present invention are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features.

[0037] In view of the technical defects existing in the related art, this embodiment provides a pyrolysis recovery device for thermally decomposing the EVA hot melt adhesive in the photovoltaic module to reduce the generation of industrial waste liquid.

[0038] like Figure 1 As shown, the pyrolysis recovery equipment of this embodiment includes a heating furnace 1 for heating materials that need to be heat treated, such as discarded photovoltaic components. The heating furnace 1 includes a furnace body and heating components such as heating wires arranged in the furnace body. A first furnace mouth for placing or taking out materials is formed on the furnace body.

[0039] Continue to refer to Figure 1 As shown, the pyrolysis recovery device of this embodiment further includes a first bearing part 2 and a heat conducting device 3. The first bearing part 2 is arranged opposite to the first furnace opening, and can be used to bear materials to be put into the furnace, or materials discharged from the heating furnace 1.

[0040] The heat conducting device 3 can transfer part of the heat in the heating furnace 1 to the inside and outside of the heating furnace through the temperature difference. The heat conducting device 3 has a heat absorbing part 31 and a heat releasing part 32 which are connected to each other by heat conduction. That is to say, heat exchange can be performed between the heat absorbing part 31 and the heat releasing part 32. The heat absorbing part 31 is located in the heating furnace 1, and the heat releasing part 32 extends to the first supporting part 2. The heat absorbing part 31 is used to transfer part of the heat in the heating furnace 1 to the heat releasing part 32, and the heat releasing part 32 is used to preheat the material placed on the first supporting part 2 using the part of the heat transferred by the heat absorbing part 31.

[0041] By way of example, the pyrolysis recovery equipment of this embodiment can be used for the recovery of discarded photovoltaic modules. After the discarded photovoltaic modules are placed in the heating furnace 1, the EVA hot melt adhesive in the photovoltaic modules is thermally decomposed under the heating action of the heating furnace 1, thereby making it easy to separate the glass and silicon cells. By way of example, in order to ensure that the EVA hot melt adhesive is fully thermally decomposed, the furnace temperature of the heating furnace 1 can be controlled at 100°C to 600°C according to the total amount of photovoltaic modules in the heating furnace 1. Since the thermal decomposition of the EVA hot melt adhesive does not produce industrial waste liquid, the use of the pyrolysis recovery equipment of this embodiment to recover discarded photovoltaic modules is beneficial to environmental protection.

[0042] Moreover, the pyrolysis recovery equipment of this embodiment can also use the excess heat in the heating furnace 1 to preheat the photovoltaic modules outside the heating furnace 1. When the previous batch of photovoltaic modules is thermally decomposed in the heating furnace 1, since the heat absorbing part 31 of the heat conducting device 3 is located in the heating furnace 1, and the heat releasing part 32 is located outside the heating furnace 1, the temperature difference between the heat absorbing part 31 and the heat releasing part 32 causes the heat conducting device 3 to transfer part of the heat in the heating furnace 1 to the outside of the heating furnace 1, that is, the heat absorbing part 31 absorbs part of the heat in the heating furnace 1 and transfers it to the heat releasing part 32. The heat releasing part 32 extending to the first bearing part 2 can directly contact the photovoltaic module placed on the first bearing part 2 to preheat the photovoltaic module, or the heat releasing part 32 can release infrared radiation heat to preheat the photovoltaic module.

[0043] In summary, the pyrolysis recovery equipment of this embodiment is not only beneficial to environmental protection, but also improves the energy utilization rate of the pyrolysis recovery equipment and the thermal decomposition efficiency of the EVA hot melt adhesive.

[0044] Optionally, the heat absorbing part 31 of the heat conducting device 3 of this embodiment is a water-cooled radiator, and the heat releasing part 32 is a heat recovery device. The water-cooled radiator is a device that uses a pump to circulate the coolant in the heat pipe for heat conduction. When the temperature in the heating furnace 1 is too high, the water-cooled radiator can transfer the excess heat in the heating furnace 1 to the outside, and the heat recovery device can recycle a large amount of waste heat discharged to the outside by the water-cooled radiator, especially for preheating the photovoltaic module placed on the first bearing part 2.

[0045] When a water-cooled radiator is used, the pyrolysis recovery device may further include a first temperature sensing device and a first control device (not shown in the figure). The first temperature sensing device is arranged in the heating furnace 1 to detect the furnace cavity temperature of the heating furnace 1, and the first control device adjusts the coolant circulation speed of the water-cooled radiator according to the furnace cavity temperature detected by the first temperature sensing device.

[0046] Continue to refer to Figure 1 As shown, the pyrolysis recovery device of this embodiment further includes a frame 51 and an angle adjustment device 52. The frame 51 is used to support the heating furnace 1 and the first bearing part 2, and the angle adjustment device 52 is arranged on a side of the frame 51 facing away from the heating furnace 1.

[0047] The angle adjustment device 52 is used to adjust the angle between the frame 51 and the ground, so that the frame 51 is inclined or parallel to the ground. Figure 1 As shown, when the frame 51 is moved to the right angle by the angle adjustment device 52, Figure 1 When the left side of the frame is tilted, the photovoltaic components placed on the first bearing part 2 slide into the heating furnace 1 under the action of gravity, so there is no need to manually carry the photovoltaic components. After the photovoltaic components have completed the heat treatment, the frame 51 is tilted by the angle adjustment device 52. Figure 1When the middle side is tilted, the photovoltaic modules in the heating furnace 1 slide out of the heating furnace 1 under the action of gravity and are placed on the first supporting part 2, so that the photovoltaic modules after heat treatment can be safely taken out. Figure 1 As shown, a second air cooling device 21 is disposed on the first bearing portion 2 , and the second air cooling device 21 is used to cool the photovoltaic assembly placed on the first bearing portion 2 .

[0048] Optionally, the angle adjustment device 52 includes a first support column 521 and a second support column 522, one end of the first support column 521 and one end of the second support column 522 are respectively hinged to the side of the frame 51 facing away from the heating furnace 1. According to actual design requirements, the first support column 521 and the second support column 522 can both be retractable structures, or one of the first support column 521 and the second support column 522 can be a retractable structure. The retractable structure can be a multi-section telescopic rod, or a hydraulic cylinder or other structure, but is not limited thereto.

[0049] Continue to refer to Figure 1 As shown, the heating furnace 1 is provided with a smoke exhaust channel 61 and an air inlet channel 62 connected to the furnace chamber of the heating furnace 1. An air inlet regulating valve 621 is provided in the air inlet channel 62 to adjust the amount of air entering the heating furnace 1. A smoke detection probe 611 is provided in the smoke exhaust channel 61, and the smoke detection probe 611 is used to detect the oxygen content in the smoke. Among them, the pyrolysis recovery equipment also includes a second control device, and the second control device adjusts the air inlet regulating valve 621 according to the oxygen content detected by the smoke detection probe 611 to control the amount of air entering the heating furnace 1.

[0050] Optionally, the pyrolysis recovery device of this embodiment may further include a second temperature sensing device and a third control device. The second temperature sensing device is disposed in the heating furnace 1 to detect the furnace chamber temperature of the heating furnace 1, and the third control device connects or disconnects the heat conduction connection between the heat absorption part 31 and the heat release part 32 according to the furnace chamber temperature detected by the second temperature sensing device.

[0051] It should be noted that during the actual thermal decomposition of the EVA hot melt adhesive, the EVA hot melt adhesive will release heat. If it is determined according to the detection result of the second temperature sensing device that the heat released during the thermal decomposition of the EVA hot melt adhesive does not cause the temperature in the heating furnace 1 to be too high, in order to ensure a stable working temperature in the heating furnace 1, the third control device can disconnect the heat conduction connection between the heat absorbing part 31 and the heat releasing part 32 to prevent the heat in the heating furnace 1 from leaking outward.

[0052] If it is judged according to the detection result of the second temperature sensing device that the heat released by the EVA hot melt adhesive during the thermal decomposition process causes the temperature inside the heating furnace 1 to be too high, the third control device can reconnect the thermal connection between the heat absorption part 31 and the heat release part 32 to transfer the excess heat to the outside of the heating furnace 1 to prevent the heating furnace 1 from overheating, and the excess heat can be used to preheat other photovoltaic components to be heat treated through the heat conduction device 3, thereby improving the energy utilization rate and the thermal decomposition efficiency of the EVA hot melt adhesive.

[0053] like Figure 2 As shown, in order to improve the loading and unloading efficiency of photovoltaic modules, in some embodiments, the pyrolysis recovery equipment may further include a second bearing part 4. A first furnace opening and a second furnace opening are formed on the furnace body of this embodiment, the first bearing part 2 is arranged opposite to the first furnace opening, and the second bearing part 4 is arranged opposite to the second furnace opening. Among them, the first furnace opening is used to put in the photovoltaic module, the second furnace opening is used to take out the photovoltaic module after heat treatment, the second bearing part 4 is used to carry the material out of the furnace, and the first bearing part 2 is used to carry the material to be put into the furnace. A first air cooling device 41 is arranged on the second bearing part 4 for cooling the photovoltaic module placed on the second bearing part 4.

[0054] Since the loading and unloading of photovoltaic modules are completed through different bearing parts, when the frame 51 is moved to the right angle by the angle adjustment device 52, Figure 2 When the left side is tilted, the photovoltaic components placed on the first supporting part 2 slide into the heating furnace 1 under the action of gravity, and the photovoltaic components that have completed heat treatment in the heating furnace slide out of the heating furnace 1 under the action of gravity and are placed on the second supporting part 4, so that the loading and unloading processes of the photovoltaic components can be completed at the same time, thereby improving work efficiency.

[0055] The above description is only a partial or preferred embodiment of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A pyrolysis recovery device, characterized in that: include: A heating furnace is used to heat the materials; A first bearing portion, used for bearing materials; A heat conduction device, comprising a heat absorbing portion and a heat releasing portion which are heat-conductively connected to each other, the heat absorbing portion is located in the heating furnace, and the heat releasing portion extends to the first bearing portion; The heat absorbing part is used to transfer part of the heat in the heating furnace to the heat releasing part, and the heat releasing part is used to preheat the material placed on the first supporting part by using the part of the heat.

2. The pyrolysis recovery equipment according to claim 1, characterized in that: The heat absorbing part is a water-cooled radiator, and the heat releasing part is a heat energy recovery device.

3. The pyrolysis recovery equipment according to claim 2, characterized in that: Also includes: A first temperature sensing device, disposed in the heating furnace, for detecting the furnace chamber temperature of the heating furnace; The first control device adjusts the cooling liquid circulation speed of the water-cooled radiator according to the furnace chamber temperature detected by the first temperature sensing device.

4. The pyrolysis recovery equipment according to claim 1, characterized in that: It also includes a second bearing part, wherein the second bearing part is used to bear the materials out of the furnace, and the first bearing part is used to bear the materials to be put into the furnace.

5. The pyrolysis recovery equipment according to claim 4, characterized in that: The second bearing portion is provided with a first air cooling device, and the first air cooling device is used for cooling the material placed on the second bearing portion.

6. The pyrolysis recovery equipment according to claim 1, characterized in that: Also includes: A frame, used for supporting the heating furnace and the first bearing part; An angle adjustment device is arranged on a side of the frame facing away from the heating furnace, and the angle adjustment device is used to adjust the angle between the frame and the ground.

7. The pyrolysis recovery equipment according to claim 6, characterized in that: The angle adjustment device includes a first support column and a second support column, one end of the first support column and one end of the second support column are respectively hinged to the side of the frame facing away from the heating furnace, and at least one of the first support column and the second support column is a retractable structure.

8. The pyrolysis recovery equipment according to claim 1, characterized in that: The heating furnace is provided with a smoke exhaust channel and an air inlet channel which are connected to the furnace cavity of the heating furnace. An air inlet regulating valve is provided in the air inlet channel. A smoke gas detection probe is provided in the smoke exhaust channel. The smoke gas detection probe is used to detect the oxygen content in the smoke. The pyrolysis recovery equipment also includes a second control device, which adjusts the air inlet regulating valve according to the oxygen content detected by the smoke gas detection probe.

9. The pyrolysis recovery equipment according to claim 1, characterized in that: The first bearing portion is provided with a second air cooling device, and the second air cooling device is used for cooling the material placed on the first bearing portion.

10. The pyrolysis recovery equipment according to claim 1, characterized in that: Also includes: A second temperature sensing device is disposed in the heating furnace and is used to detect the furnace chamber temperature of the heating furnace; The third control device connects or disconnects the heat conduction connection between the heat absorbing part and the heat releasing part according to the furnace cavity temperature detected by the second temperature sensing device.

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