Recycling device and method for laminar structures bonded by cured adhesive

Abstract

To provide a recycling device and a recycling method for laminar structures bonded by cured adhesive.SOLUTION: A recycling device comprises a barrel device, a molten salt supply device and a transfer device. The barrel device accommodates the laminar structures. The molten salt supply device fills a specially formulated molten salt into the barrel device, and also discharges the molten salt from the barrel device. The transfer device transfers the laminar structures between the outside environment, the temperature-adjusting space and the barrel device. Through design of the barrel device, molten salt supply device and transfer device, molten salt is used to heat and pyrolyze the solidified adhesive in the laminar structures.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an apparatus and method for recycling a solidified and bonded layered structure. [Background technology]

[0002] As renewable energy is gaining attention around the world, solar power generation is used as one of the main renewable energy sources in many countries. Solar cell modules have a lifespan, and modules that no longer generate power must be removed from the power generation system. This means that an increasing number of solar cell modules are being discarded, and recycling of discarded solar cell modules has become an important industrial issue at present.

[0003] A solar module usually consists of major components such as a frame, a glass cover, a solar panel, adhesive, a back plate, and a connection box. The solar panel is very tightly bonded between the glass cover and the back plate because the warranty period of the solar module is as long as 25 years. When recycling a solar module, the biggest challenge is to completely separate the glass cover, the solar panel, and the back plate. The back plate is usually made of fluorine-based materials, and burning it directly is not good for the environment, so it is not an acceptable disposal method at present.

[0004] Currently, the main method for removing the glass cover and backplate of a solar module is mechanical peeling or scraping. However, this method is prone to cracking the glass cover, which requires other improvements. In addition, traditional recycling methods can only process solar modules one by one, making it difficult to recycle large numbers of modules at the same time. Similar problems arise when recycling other types of solidified bonded layered structures. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Taiwan Invention Patent Publication No. TW201028224A

[0006] China Patent Publication No. CN115805227A discloses a molten salt type recycling device for discarded printed circuit boards, Taiwan Patent Publication No. TW M426447U discloses a modular device for rapid extraction of metal ions by high temperature liquid inorganic molten salt, Taiwan Invention Patent Publication No. TW201028224A discloses a reactor device for pyrolyzing printed circuit boards, and China Utility Model Publication No. CN210305002U discloses a molten salt furnace exhaust treatment device. The technologies in these patent documents involve immersing the waste to be recycled in a molten salt bath without prior heating, which causes the same problems. In addition, the temperature difference before and after the waste is immersed in the molten salt is too large, so the plate-shaped objects that were intended to be completely recovered are damaged, and in the process of immersing the waste in the molten salt that was poured in beforehand, the waste sways and collides due to the buoyancy and surface tension of the molten salt, causing it to be damaged or moved. Or, when the plate-shaped materials to be recovered after decomposition are taken out of the molten salt, a large amount of molten salt adheres to the plate-shaped materials, which adhere to the surface of the plate-shaped materials during cooling, making processing difficult. As a result, the efficiency and quality rate of the recovered plate-shaped materials are reduced, so there is room for improvement. Summary of the Invention [Problem to be solved by the invention]

[0007] SUMMARY OF THE PRESENT EMBODIMENT It is therefore an object of the present invention to provide a recycling apparatus for solidified bonded layered structures to remedy at least one of the shortcomings of the prior art. [Means for solving the problem]

[0008] The recycling device for the solidified bonded layered structure of the present invention includes a tank, a molten salt supplying device, a transfer device installed in a cavity device, and a control device. The tank defines a recycling processing space for containing the layered structure. The molten salt supplying device is used to inject a molten salt having a uniquely prepared composition into the tank, and can also discharge the molten salt in the tank. The transfer device can transfer the layered structure between the outside, the temperature-controlled space, and the recycling processing space.

[0009] In one embodiment, the molten salt supply device includes a molten salt container containing a molten salt in a molten state, and a pump system connecting the recycle processing space of the tank and the molten salt container. The pump system includes a transport pipe, and when the liquid level of the molten salt in the recycle processing space of the tank falls below a predetermined lower liquid level, the transport device sends the holder and the layered structures contained in the holder to the recycle processing space. Next, the pump and the transport pipe of the equipment are opened by control, and the molten salt in the molten salt container is injected into the recycling processing space in which the layered structure is installed, and the molten salt is heated until the liquid level of the molten salt reaches a predetermined high liquid level, thereby thermally decomposing the hardened adhesive in the layered structure. Then, after a predetermined processing time has elapsed, the equipment controlling the pump body, with the holder and the multiple layered structures remaining within the recycle processing space, pumps the molten salt in the recycle processing space back into the molten salt container again, continuing this process until the liquid level of the molten salt in the recycle processing space falls below a predetermined lower liquid level, and when the liquid level of the molten salt in the recycle processing space falls below the predetermined lower liquid level again, the transfer device removes the holder and the layered structures contained therein from the recycle processing space.

[0010] In one embodiment, the recycling device further includes a cavity device and a cooling device. The cabinet device includes a cabinet and a door unit attached to the cabinet, and a temperature control space is defined inside the cavity and can communicate with the recovery processing space. The door unit is controlled by a control device and changes between a first position that connects the temperature control space to the outside and closes the recycling processing space, and a second position that blocks the temperature control space from the outside and connects the temperature control space to the recycling processing space. The temperature control space has a first temperature control section that connects with the outside and a second temperature control section that connects the first temperature control section to the recycling processing space, and the door unit includes the first door. When the door unit is in the first position, the first door closes the second temperature control section and the recycling processing space, and connects the first temperature control section to the outside. When the door unit is in the second position, the one door closes the first temperature control section and the outside, and connects the second temperature control section to the recycling processing space.

[0011] In one embodiment, when the controller activates a recycle function, a preheat program, a recycle processing program, and a cooling program are executed in sequence. In the preheating program, the control device controls the conveying device to transport the holder from the outside to a first temperature adjustment section and move the door unit to a second position. Then, after an initial preheating time, the holder is transported to a second temperature adjustment section and waits for a high-temperature preheating time. In the recycling processing program, the holder is transported to the recycling processing space. In the cooling program, the holder is transported from the recycling processing space to a second temperature adjustment section and waits for a first cooling time, and then transported to the first temperature adjustment section and waits for a second cooling time. Then, the door unit is moved to the first position and the holder is transported to the outside.

[0012] Another object of the present invention is to provide a method for recycling solidified bonded layered structures, which can overcome at least one of the drawbacks of the above-mentioned techniques.

[0013] The method for recycling a solidified bonded layered structure of the present invention comprises the following steps. In one heat treatment medium preparation step, a molten salt composition containing potassium nitrate as a main component is prepared and placed in a molten salt container, and the molten salt in the molten salt container is heated to a predetermined heat treatment temperature to become fluid. In one preheating step, a conveying device is controlled by a control device to convey a plurality of layered structures contained in a holder to a temperature adjustment space, and the temperature difference between the layered structures and the molten salt is reduced, and one recovery processing step further includes the recovery processing step. In one layered structure placement step, the control device uses the conveying device to place the layered structure that has completed the preheating treatment together with the holder in one recycle processing space of a tank. At this point, the liquid level of the molten salt in the tank has not reached the bottom of the layered structure. Next, in one molten salt injection step, the control device injects the heated molten salt from the molten salt container into the recycle processing space of the tank until the liquid level completely covers the top of the layered structure. Furthermore, the control device controls a heat-insulating device to maintain the molten salt at a predetermined heat-insulating temperature. Next, in a molten salt heating and cracking treatment step, the layered structure is immersed in the molten salt, the adhesive contained in the layered structure contacts the molten salt for a treatment time, and the layered structure is separated to obtain a cycle product. In one recovered product removal step, after the treatment time is over, the control device uses a pump device to return the molten salt to the molten salt container until the liquid level of the molten salt in the recycle treatment space is lower than the bottom of the layered structure. In one cooling step, the control device uses a transfer device to move the holder and the layered structure together with the recycle product generated by the molten salt treatment from the recycle treatment space to a temperature-adjusting space after the treatment time is over and the liquid level of the molten salt in the recycle treatment space is lower than the bottom of the layered structure, and a cooling treatment is performed. In another discharge step, the control device uses the transfer device to move the recycle product from the temperature-adjusting space after the cooling treatment of the recycle product is completed. Effect of the Invention

[0014] In one embodiment, the composition of the molten salt to be prepared is a potassium nitrate molten salt with an additional pure potassium element added thereto, so that the weight percentage of potassium in the molten salt after preparation is higher than that of the pure potassium nitrate molten salt, and the weight of the added pure potassium element is in the range of 5% to 15% of the total weight of the potassium nitrate molten salt, which can accelerate the effect of cracking. [Brief description of the drawings]

[0015] Other features and advantages of the invention will become apparent from the following illustrative examples, the drawings of which are: [Figure 1] 1 is a side cross-sectional view of a first embodiment of a recovery device for a solidified and bonded layered structure according to the present invention; [Diagram 2] 1 is an incomplete cross-sectional side view showing a layered structure to be recovered in a first embodiment of the present invention. [Diagram 3] FIG. 3 of the present invention is a three-dimensional view of a part of the placement tool of the first embodiment. [Figure 4] 4 is a step flow chart showing a second embodiment of the method for recovering a solidified and bonded layered structure according to the present invention. [Diagram 5] The diagram of the present invention is similar to FIG. 1, and shows a layered structure formed using molten salt in the first embodiment. [Figure 6] FIG. 11 is a functional block diagram of a second embodiment of the present invention. [Figure 7] FIG. 2 is a side cross-sectional view of a second embodiment of the apparatus for recovering a solidified and bonded layered structure of the present invention. [Figure 8] 8 is a view similar to FIG. 7 of the present invention, showing the door unit changed to the first position and the placement tool moved to the first temperature adjustment section. [Figure 9] 8 is a view similar to FIG. 7 of the present invention, showing the placement tool moving to the first temperature adjustment section and the door unit changing to the second position. [Figure 10] 8 is a view similar to FIG. 7 of the present invention showing the placement tool being transferred to the second temperature control section. [Figure 11]8 is a view similar to FIG. 7 of the present invention, showing the placement tool being moved into the collection and treatment space and the layered structure contacting the molten salt. [Figure 12] 8 is a view similar to FIG. 7 of the present invention showing the treated layered structure being moved upwardly from the collection and treatment space by the placement tool. [Figure 13] FIG. 13 of the present invention is a view similar to FIG. 7, showing the placement tool moving to the third temperature control section and the cooling device operating to generate cooled air. [Figure 14] 8 is a view similar to FIG. 7 of the present invention, showing the door unit in a third position and the third temperature control section communicating with the outside. [Figure 15] 8 is a view similar to FIG. 7 of the present invention showing the placement tool being transferred from the third temperature control section. [Figure 16] FIG. 11 is a side cross-sectional view of a third embodiment of the apparatus for recovering a solidified and bonded layered structure of the present invention. [Figure 17] FIG. 11 is a structural diagram of a fourth embodiment of the apparatus for recovering a solidified and bonded layered structure according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] 1, 2 and 5, a first embodiment of a recovery device 200 for a layered structure 900 used for a layered structure solidified with an adhesive of the present invention is applied to thermally decompose a solidified adhesive 902 using a molten salt 910 to separate each layer 901 of the layered structure 900. The layered structure 900 is a solar cell module composed of layers 901 (including a glass cover 901a, a photovoltaic panel 901b, and a back plate 901c) bonded with an adhesive 902 such as EVA (ethylene vinyl acetate copolymer), PVB (polyvinyl butyral), or TPU (thermoplastic polyurethane).

[0017] The recovery device 200 includes one cavity device 2, two tank devices 3, a molten salt supply device 5 connected to the tank device 3 and supplying the heated molten salt 910, a heating device 61 installed in the molten salt supply device 5, a transfer device 4 for moving two devices for holding the layered structure 900 to the tank device 3, and two heat retention devices 62 installed in the tank device 3, respectively. Also includes a control device 7 connected to the tank device 3, the molten salt supply device 5, the heating device 61, the heat retention device 62, and the transfer device 4 by signals.

[0018] Each tank device 3 has a recycle processing space 310 with an upward opening, and includes a tank 31 and a lid body 32 (hereinafter also referred to as a door body) attached to the top of the tank 31 and covering the recycle processing space 310, the tank 31 can store the molten salt 910 within the recycle processing space 310, and the opening and closing of the lid body 32 is controlled by the control device 7.

[0019] 1, 3 and 5, the transfer equipment 4 is respectively installed above the tank device 3, one of the transfer equipments 4 is installed above the corresponding tank device 3, and includes a transfer device 42 and a holder 41 attached to the transfer device 42, carrying the layered structure 900, and the transfer device 42 can move the corresponding holder 41 downward and send the corresponding tank 31 into the recycling processing space 310, move the holder 41 upward and out of the recycling processing space 310, and hold the holder 41 in the position of the temperature adjustment space 211.

[0020] In this embodiment, the transport device 42 is a hanging device, but in other embodiments, a rail-type transport device can also be used. The transport device 42 is an existing technology, and there are many types, so a detailed description is omitted.

[0021] The holder 41 is an open frame structure connected by multiple rods 411, which separates and stores the layered structure 900 and has multiple separating sections 410. The holder 41 is moved to the recycling processing space 310 by a transfer device 42 and transfers the layered structure 900 it holds into the recycling processing space 310.

[0022] The molten salt supply device 5 includes a molten salt container 51 that contains salts that are heated to a molten state, and two pump devices 53 that connect the molten salt container 51 and the tank 31. The pump device 53 includes two devices that are connected and installed between the molten salt container 51 and the tank 31, has a valve function, and includes a transport pipe 52. The molten salt container 51 is heated by the heating device 61, and the salts contained therein are transformed into the heated molten salt 910. The melting point of the salts that make up the molten salt 910 is in the range of 200 to 550°C, and includes, for example, sodium nitrate and potassium nitrate, but is not limited to potassium.

[0023] Each transport pipe 52 of the pump equipment 53 has one end connected to the bottom of the molten salt container 51 and the other end connected to the upper part of the recycle processing space 310 of the tank 31, and each transport pipe 52 is controlled by the control device 7 so that the molten salt 910 in the molten salt container 51 can be transported and injected into the recycle processing space 310 of the tank 31.

[0024] Each of the pump facilities 53 is connected to the bottom of the recycle processing space 310 of the tank 31 and can control the molten salt 910 in the recycle processing space 310 to return to the molten salt container 51 .

[0025] The heating device 61 is installed in the molten salt container 51, generates heat when electricity is applied, heats the molten salt container 51, dissolves the salts in the container into the molten salt 910, and maintains the temperature at a predetermined melting temperature. The heat-retaining devices 62 are installed in the tanks 31, and each heat-retaining device 62 is an electric heating device that generates heat when electricity is applied, heats the molten salt 910 in the corresponding tank 31, and maintains the molten salt 910 at a predetermined heat-retaining temperature. However, in other embodiments of the present invention, the heating device 61 and each heat-retaining device 62 may be other types of heaters, such as a direct-fire heater or a solar energy heater that uses sunlight.

[0026] The control device 7 includes a first temperature sensor 71 installed in the molten salt container 51, two liquid level sensors 72 installed in each of the tanks 31, two second temperature sensors 73 installed in each of the tanks 31, and a controller 74 that is connected to the first temperature sensor 71, the liquid level sensor 72, and the second temperature sensor 73 by signals. The first temperature sensor 71 is used to sense the temperature of the molten salt 910 in the molten salt container 51. Each liquid level sensor 72 is used to sense the liquid level of the molten salt 910 in the corresponding recovery processing space 310. Each second temperature sensor 73 senses the temperature of the molten salt 910 in the recovery processing space 310.

[0027] In this embodiment, the first temperature sensor 71 and the second temperature sensor 73 are infrared temperature sensors, but other types of temperature sensors (e.g., thermocouples, etc.) can also be used. The liquid level sensor 72 is an optical type, but depending on the embodiment, a float type, an electrical type that detects changes in electrical resistance, an ultrasonic type, a radar type, or other liquid level sensor can also be used.

[0028] The controller 74 can also be connected to the lid body 32, the heating device 61, the heat retention device 62, the transport pipe 52, and the pump equipment 53, and can also be connected to the transport pipe 52 and the pump equipment 53 via signal connections, thereby controlling the operation of the lid body 32, the conveying device 42, the heating device 61, the heat retention device 62, the transport pipe 52, and the pump equipment 53.

[0029] The controller 74 has a recovery processing program built in, and when the program is started, it controls the transfer device 42 to transfer the holder 41 holding the multiple layered structures 900 to the recovery processing space 310, and controls the heating device 61 to heat the molten salt 910 in the molten salt container 51 to a predetermined melting temperature. The transfer device 42 places the holder 41 in the recycling processing space 310, and the molten salt 910 has not yet been injected into the recycling processing space 310, or the liquid level of the small amount of molten salt 910 remaining in the recycling processing space 310 has not yet reached the bottom of the layered structures 900. When the controller 74 determines that the temperature of the molten salt 910 measured by the first temperature sensor 71 has reached a predetermined melting temperature, it controls the transport pipe 52 of the pump equipment 53 to connect the molten salt container 51 and the tank 31, and starts to inject the molten salt 910 into the recycling processing space 310 where the holder 41 and the layered structure 900 are located. When the controller 74 analyzes the liquid level measured by each of the liquid level sensors 72, and determines that the liquid level has reached a predetermined high water level, it closes the transport pipe 52 of the pump equipment 53 and closes the cover 32 of the tank device 3 to seal the recycling processing space 310, thereby preventing heat dissipation, and counts a predetermined processing time, which is, for example, 10 minutes, 20 minutes, or 1 hour.

[0030] During the period in which the measurement of the scheduled processing time is started, the controller 74 individually controls the operation of the heat retention device 62 based on the temperature of the molten salt 910 in the tank 31 sensed by each temperature sensor 73, whereby the heat retention device 62 individually heats the molten salt 910 in the tank 31 and maintains the molten salt 910 at the scheduled heat retention temperature.

[0031] When the predetermined treatment time for each tank 31 is completed, the controller 74 starts the pumping device 53 to return the molten salt 910 in the recovery treatment space 310 to the molten salt container 51. The holder 41 and the layered structure 900 are still in the tank 31. When the controller 74 determines that the liquid level measured by the liquid level sensor 72 has reached a predetermined low water level, it controls the pumping device 53 to open the cover 32, and the transfer device 42 removes the holder 41 and the layered structure 900 from the recovery treatment space 310, completing the recovery treatment.

[0032] In this embodiment, two tank devices 3 and two transfer equipment 4 are used as an example, but the number is not limited to this, and the number of tank devices 3 and transfer equipment 4 can be increased or decreased as needed, with a minimum of one.

[0033] In other embodiments, the structures, connections, and functions of the components included in the recovery device 200 are almost the same as or similar to those in the first embodiment. In the following description and drawings, components having the same structures and functions are directly given the same names and numbers, and their details will not be described repeatedly.

[0034] 4, 6 and 7, a second embodiment of the apparatus 200 for bonding and recovering a layered structure 900 of the present invention is applied to use a fluid molten salt 910 to heat and decompose the solidified adhesive in the layered structure 900 and separate each bonded layered object 901 (shown in FIG. 15).

[0035] The second embodiment of the recovery device 200 includes a chamber facility 2, a tank device 3 including at least one tank 31, a molten salt supply facility 5 for supplying a heated molten salt 910 connected to the tank device 3, a heating device 61 installed in one molten salt supply facility 5, at least one heat retention device 62 in contact with the tank 31, a cooling device 69, at least one transfer facility 4, and a control facility 7. The control facility 7 is connected to the chamber facility 2, the tank device 3, the molten salt supply facility 5, the heating device 61, the heat retention device 62, the cooling device 69, and the transfer facility 4, and the molten salt supply facility 5 includes the molten salt container 51 and a pump facility 53 (including a transport pipe 52). The control facility 7 includes a first temperature sensor 71, a liquid level sensor 72, a second temperature sensor 73, and a controller 74. The structures of these components in the second embodiment of the recovery device 200 are similar to those in the first embodiment, so details thereof will be omitted.

[0036] The chamber facility cavity facility 2 includes a chamber 21 and a door unit 22 installed in the chamber 21. The chamber 21 includes a temperature control space 211 that communicates vertically, and a recovery processing space 310 into which the molten salt 910 is injected from a molten salt supply facility 5. The temperature control space 211 includes a first temperature control section 212, a second temperature control section 213, and a third temperature control section 214 that are aligned laterally and communicate with each other in sequence, and the recovery processing space 310 is connected below the second temperature control section 213.

[0037] 6, 7 and 14, the unit 22 includes a first door 221 and a second door 222 spaced apart from each other in the chamber 21, and two actuators 223 connected to the first door 221 and the second door 222. Each actuator 223 is controllable to change the corresponding first door 221 to a state between the first temperature control section 212 and the outside, or between the second temperature control section 213 and the collecting and processing space 310, and change the corresponding second door 222 to a state between the third temperature control section 214 and the outside, or between the second temperature control section 213 and the collecting and processing space 310.

[0038] In this second embodiment, the actuators 223 are telescopic cylinders that telescopically move the first door 221 and the second door 222 relative to the chamber 21, and in practice, in other embodiments of the present invention, the actuators 223 can also be motor-driven devices. There are many different types of actuators for controlling the opening and closing of doors, so in practice, the actuators 223 are not limited to this form.

[0039] When the door unit 22 is in the first position (see FIG. 8), the first temperature control section 212 communicates with the outside, the first door 221 separates the second temperature control section 213 from the collecting processing space 310, and the second door 222 separates the third temperature control section 214 from the outside. When the door unit 22 is in the second position (see FIG. 7), the first door 221 separates the first temperature control section 212 from the outside, the second temperature control section 213 communicates with the collecting processing space 310, and the second door 222 separates the third temperature control section 214 from the outside. When the door unit 22 is in the third position (see FIG. 14 ), the first door 221 closes and isolates the first temperature control section 212 from the outside, the second door 222 closes and isolates the second temperature control section 213 from the recycle processing space 310, and the third temperature control section 214 is connected to the outside. When the door unit 22 is in the second position, the thermal energy generated by the heat preservation device 62 or the thermal energy of the molten salt 910 in the recycle processing space 310 rises and spreads into the temperature control space 211, so that the environmental temperature of the second temperature control section 213 becomes higher than the environmental temperatures of the first temperature control section 212 and the third temperature control section 214. In this embodiment, the temperature of the first temperature adjustment section 212 is maintained between 100 and 200° C., the temperature of the second temperature adjustment section 213 is maintained between 200 and 350° C., and the temperature of the third temperature adjustment section 214 is kept below 200° C. The temperature of the molten salt in the tank 31 is maintained at a high temperature of 300 to 550° C. by the heat retention device 62.

[0040] The heat retention device 62 is controlled by the control equipment 7, and not only heats and retains the molten salt 910 contained in the recycling processing space 310, but also heats the empty tank 31 (or a small amount of molten salt 910 remaining in the tank 31 where the liquid level does not reach the bottom of the layered structure 900), and has the function of increasing and maintaining the temperature of the second temperature control section 213.

[0041] The cooling device 69 is controlled by the control device 7 to generate a cooling air flow 690 in the third temperature control section 214, and the cooling air flow cools the items in the third temperature control section 214. In this embodiment, the cooling device 69 is a fan device, but in practice, in other embodiments of the present invention, the cooling device 69 can also be an air conditioning device using a refrigerant.

[0042] The transfer apparatus 4 includes an orbital unit 40 extending laterally within the chamber 21, a transfer device 42 mounted on the orbital unit 40 and capable of moving along the orbital unit 40 in a controlled manner, and a holder 41 that is detachable and attached to the transfer device 42 for storing multiple layered structures 900 awaiting retrieval.

[0043] In this embodiment, the track unit 40 extends across the first temperature control section 212, the second temperature control section 213, and the third temperature control section 214. The transfer device 42 is a hanging equipment that suspends and transfers the holder 41 up and down and controls the transfer of the holder 41 between these sections along the track unit 40. An embodiment of the holder 41 is shown in FIG.

[0044] In another embodiment of the present invention, the track unit 40 extends between the outside and the first temperature control section 212, between the second temperature control section 213 and the recycling processing space 310, and between the third temperature control section 214 and the outside. The transfer device 42 is changed to a track-type transfer device to transfer the fixture 41 between these sections and spaces along the track unit 40.

[0045] 6 and 7, the control device 7 includes a number of temperature sensors 71, 73 for measuring the temperature of the molten salt 910 in the recovery treatment space 310, a liquid level sensor 72, and a controller 74 for receiving signals connected to the sensors 71, 72, 73. The controller 74 is equipped with a recovery function, and when the recovery function is operated, it sequentially executes a medium heating process, a preheating process, a recovery treatment process, and a cooling process to perform the recovery treatment of the layered structure 900, and the details of these processes related to the recovery function will be described later.

[0046] 4, 6 and 7, when the recovery device 200 of the present invention recovers the layered structure 900, the holder 41 is placed under the first temperature control section 212, the layered structure 900 to be recovered is placed on the holder 41, and then the recovery operation is started. The recovery method in which the recovery device 200 of the present invention recovers the layered structure 900 includes the following steps.

[0047] Regarding the heat treatment medium preparation step 81, first, it is necessary to adjust the composition of the heat treatment medium (step 811). In the present invention, the heat treatment medium uses a molten salt 910 containing potassium nitrate as a main component. In an optimal embodiment, in the composition adjustment step 811 of the heat treatment medium preparation step 81, pure potassium element is added to the potassium nitrate molten salt, and the weight percentage of potassium in the adjusted molten salt 910 is higher than the potassium content of the pure potassium nitrate molten salt. The potassium ions promote the exchange reaction of potassium ions and sodium ions with the glass layer of the layered structure 900, and increase the potassium ion concentration of the glass, thereby improving the hardness of the glass surface. In this embodiment, the weight of the potassium element added to the molten salt containing potassium nitrate as the main component is 0.1% to 20% relative to the weight of the potassium nitrate molten salt. The optimal range is 5% to 15% of the added potassium element in terms of the weight percentage of the potassium nitrate molten salt. Specifically, the relative molecular weight of potassium nitrate (KNO3) is 101.087, and its component ratio is 38.67% potassium, 13.86% nitrogen, and 47.47% oxygen. By adding 5% to 15% pure potassium element, the potassium component ratio in the molten salt is increased from 41.6% to 46.68%, and the decomposition process can be accelerated to the maximum in this optimal range. In another embodiment, in the blending adjustment step 811 of the heat treatment medium preparation step 81, sodium nitrate is added to the molten salt mainly composed of potassium nitrate, and the sodium ion content of the adjusted molten salt 910 is increased, and the sodium ions in the sodium nitrate do not cause an exchange reaction with the sodium ions in the glass layer of the layered structure 900, so that during the decomposition in the recovery process, the surface hardness of the glass layer is maintained in the process of losing the adhesive layer's adhesion, or the glass strength is gradually reduced. In this embodiment, the weight of sodium nitrate added to the molten salt mainly composed of potassium nitrate is in the range of 0.1% to 20% of the weight of the entire molten salt. However, the optimum range of operation is when the added sodium nitrate reaches a range of 5% to 15% by weight of the potassium nitrate-based molten salt, which can maximize the integrity of the layered objects such as the glass layer, back plate, and photoelectric plate after peeling.

[0048] When the recycling method of the present invention aims to increase the decomposition efficiency as much as possible, in the recipe adjustment step 811, additional pure potassium element is added to the potassium nitrate molten salt so that the weight ratio of the added potassium element to the potassium nitrate molten salt is 5% to 15%. This can improve the decomposition efficiency. On the other hand, when the recovery method aims to maintain the integrity of the layered object such as the glass layer, back plate, photovoltaic panel obtained after peeling as much as possible, in the recipe adjustment step 811, additional sodium nitrate is added to the potassium nitrate molten salt so that the weight ratio of the added sodium nitrate is 5% to 15%. This can maintain the integrity of the layered object such as the glass layer, back plate, photovoltaic panel obtained after decomposition.

[0049] After preparing the molten salt 910, it is placed in the molten salt container, and the controller 74 activates the recycle function to start the heating step 812, in which the controller 74 moves the door unit 22 to the second position, completely isolates the temperature control space 211 and the recycle processing space 310 from the outside, and connects the recycle processing space 310 to the temperature control space 211. Next, in the heating step 812, the controller 74 controls the heating device 61 and the heat retention device 62 based on the temperature of the molten salt 910 measured by the temperature sensors 71 and 73 to heat the molten salt 910 in the molten salt container 51 to a predetermined heat treatment temperature in a fluid state. The heat retention device 62 also maintains the tank body 31 (at this point, the molten salt 910 has not yet been poured, or the small amount of the molten salt 910 remaining in the tank body 31 has not yet reached a liquid level high enough to immerse the bottom of the layered structure 900) at a predetermined heat treatment temperature.

[0050] The thermal energy generated by the heat retention device 62 for heating the tank body 31 and / or the thermal energy of the molten salt 910 in the recycle processing space 310 communicates and rises to the temperature adjustment space 211. The environmental temperature of the second temperature adjustment section 213 communicating directly above the recycle processing space 310 is the highest, and the environmental temperatures of the first temperature adjustment section 212 and the third temperature adjustment section 214 communicating with both sides of the second temperature adjustment section 213 are lower than that.

[0051] 4, 6, 8 and 9, in a pre-heating step 82, the controller 74 executes a pre-heating process. The controller 74 changes the door unit 22 from the second position to the first position, and connects the first temperature adjustment section 212 to the outside. Then, the controller 74 controls the transfer device 42 to raise the holder 41 and move it to the first temperature adjustment section 212, and returns the door unit 22 to the second position to isolate the first temperature adjustment section 212 from the outside, and starts a pre-heating process of the layered structure 900 held by the holder 41.

[0052] When performing the preheating treatment, the controller 74 first uses the transfer device 42 to hold the holder 41 in the first temperature adjustment section 212 for an initial preheating time. During this initial preheating time, the layered structure 900 in the holder 41 is subjected to an initial preheating treatment using thermal energy that has diffused and reached the first temperature adjustment section 212, thereby increasing the temperature of the layered structure 900. Thereafter, the controller 74 moves the holder 41 to the second temperature adjustment section 213, where a higher temperature preheating is performed. During this high-temperature preheating period, the thermal energy of the second temperature adjustment section 213, which has a higher temperature, is used to further increase the temperature of the layered structure 900, thereby reducing the temperature difference between the layered structure 900 and the molten salt 910.

[0053] 4, 6, 11, the recovery processing step 83. After the preheating step 822 is completed, the controller 74 continues to execute the recovery processing program, and the controller 74 controls the transfer device 42 to transfer the holder 41 downward into the empty recovery processing space 310, and then injects the molten salt 910 from the molten salt container 51 into the recovery processing space 310 in the tank 31, so that the layered structure 900 in the holder 41 is completely immersed in the molten salt 910, and the holder 41 remains in the recovery processing space 310 for a processing time. After the molten salt 910 is injected into the recovery processing space 310, the heat retention device 62 continues to heat the fluid molten salt 910 in the recovery processing space 310 to maintain a predetermined heat treatment temperature. In this embodiment, the recovery processing step 83 further includes steps 831 to 834.

[0054] In the layered structure placement step 831, the control device 7 controls each transfer device 42 to transfer the corresponding holder 41 to the recovery processing space 310 of the tank 31. The layered structure 900 to be recovered is placed in the divided section 410 of each holder 41. At this point, the tank 31 has not yet been filled with the molten salt 910, or the remaining small amount of the molten salt 910 has not yet reached a liquid level high enough to immerse the bottom of the layered structure 900.

[0055] In the molten salt filling step 832, the controller 74 controls the heating device 61 to heat the molten salt 910 in the molten salt container 51 to a predetermined melting temperature. The transport pipe 52 of the pump equipment 53 is opened to inject the molten salt 910 into the recovery processing space 310. When it is determined based on the result of the liquid level sensor 72 that the molten salt 910 has reached a predetermined liquid level and the layered structure 900 is completely covered with the molten salt 910, the transport pipe 52 of the pump equipment 53 is closed. The predetermined melting temperature is in the range of 200 to 550°C.

[0056] The reason why the recovery device of the present invention first puts the layered structure 900 to be recovered into the empty tank 31 and then pours in the molten salt 910 is that if the layered structure 900 is placed in the tank 31 when there is already liquid molten salt in the tank 31, the entire holder 41 is very heavy, and surface tension and buoyancy act when entering the liquid molten salt. When the holder 41 and the bottom of the layered structure 900 come into contact with the surface of the molten salt and try to break through the buoyancy and surface tension, the gravity of the holder 41 and the layered structure 900 themselves and the surface tension and buoyancy of the molten salt affect each other in the process of entering the liquid molten salt, causing the holder 41 and the layered structure 900 inside it to move irregularly up and down or left and right, which brings risks to the manufacturing process. This phenomenon continues until the holder 41 and the layered structure 900 are almost completely submerged in the molten salt, and then stabilize. Therefore, in order to avoid unstable shaking caused by the surface tension and buoyancy of the molten salt, the recovery device of the present invention is provided with the molten salt container 51, the transport pipe 52, and the heating device 61, which are independent of the tank 31 and the heat retention device 62. In the recovery process step 83, the holder 41 and the layered structure 900 are first placed in the empty tank 31, and then the molten salt heated by the heating device 61 is injected into the tank 31 through the molten salt container 51 and the transport pipe 52 of the pump device 53, thereby eliminating the risk of unstable shaking.

[0057] In the molten salt thermal decomposition treatment step 833, the controller 74 closes the transport pipe 52 of the pump device 53, then closes the door 221 to seal the recovery treatment space 310, and measures the scheduled treatment time. At the same time, the controller 74 operates the heat retention device 62 to maintain the molten salt 910 in the tank 31 at a scheduled heat retention temperature. The heat retention temperature ranges from 200 to 550°C, and more preferably from 300 to 550°C.

[0058] During the timing of the scheduled processing time of the molten salt thermal decomposition processing step 833, the layered structure is completely immersed in the molten salt in the recovery processing space, and the solidified adhesive in the layered structure 900 contacts the molten salt 910. The molten salt 910 thermally decomposes each solidified adhesive in the layered structure 900, so that each layered object 901 fixed by the adhesive 902 is separated, and the recovery product to be recovered is obtained. The structure of the layered structure 900 can be seen in FIG. 2.

[0059] In the recovered material removal step 834, after the scheduled processing time ends, the control device 7 controls the pump device 53 to return the molten salt 910 in the recovery processing space 310 to the molten salt container 51. When the controller 74 determines that the molten salt 910 has reached a scheduled low water level based on the detection result of the liquid level sensor 72, that is, when the liquid level of the molten salt 910 in the recovery processing space 310 (in the tank 310) falls below the bottom of the layered structure 900, it controls the gate body 221 to open, controls the transfer device 42 to move the holder 41 upward from the recovery processing space 310, and performs the cooling step 84. At this point, the layered object 901 generated and peeled off by the recovery processing of the layered structure 900 can be obtained. For example, in the case of the recovery processing of the layered structure 900 such as a photovoltaic power generation module, the glass cover, back sheet, and photovoltaic panel that are independently separated are obtained.

[0060] The present invention uses molten salt to break down the adhesive in the layered structure, and first drains the molten salt to a predetermined low water level, then opens the lid and pulls the holder and layered object upward. The design suppresses the hot air from the molten salt, reduces the resistance when removing the holder and layered object, and greatly reduces the risk of the molten salt adhering to the holder and layered object. As a result, the molten salt adhering to the layered object is less likely to solidify when exposed to the outside air, which can improve the success rate and efficiency of the subsequent recovery process.

[0061] 4, 6 and 12, in the cooling step 84, after completing the recovery processing step 83, the controller 74 starts the cooling process. The controller 74 controls the transfer device 42 to move the holder 41 upward and enter the second temperature control section 213. That is, the recovered product is moved upward from the recovery processing space 310 and stays in the second temperature control section 213 for a first cooling time, during which the molten salt 910 of the residual liquid adhering to the recovered product (layered object 901) drips down toward the recovery processing space 310, and the layered object 901 is gradually cooled to an ambient temperature of the second temperature control section 213.

[0062] 6, 13 and 14, the controller 74 then controls the conveying device 42 to move the holder 41 laterally to the third temperature adjustment section 214, where it is held for the second cooling time. At the same time, the controller 74 controls and activates the cooling device 69 to generate the cooling airflow 690 in the third temperature adjustment section 214. The cooling airflow 690 can be used to improve the cooling rate of the collected material in the holder 41.

[0063] Then, the controller 74 controls the gate unit 22 to switch to the third position, so that the second gate 222 isolates the recovery processing space 310 from the second temperature adjustment section 213, prevents the heat in the recovery processing space 310 from diffusing to the temperature adjustment space 211, and communicates the third temperature adjustment section 214 with the outside. The controller 74 controls the transfer device 42 to keep the holder 41 in the third temperature adjustment section 214, and continues to operate the cooling device 69 during the third cooling time to further increase the cooling rate of the recovered product in the holder 41. This makes the temperature of the recovered product closer to the external environmental temperature.

[0064] 4, 6 and 15, in a discharge step 85, after the cooling step 84 is completed, the controller 74 controls the conveying device 42 to move the holder 41 downward from the third temperature adjustment section 214, thereby completing the recovery treatment process. The recovered layered object 901 can then be removed from the holder 41.

[0065] In the recovery device and recovery method of the present invention, the conveying device 42 is controlled to hold the layered structure 900 for a predetermined time in the first temperature control section 212, the second temperature control section 213, and the third temperature control section 214 before the layered structure 900 is transferred to the recovery processing space 310 and the molten salt is injected therein, or before the layered structure 900 is transferred to the outside from the recovery processing space 310 where the layered structure 900 is decomposed. This reduces the temperature difference between the temperature of the layered structure 900 and the working temperature required for each recovery process, which not only improves the efficiency of the recovery process but also prevents the layered object 901 of the layered structure 900 from being damaged due to a sudden temperature difference, and improves the results of recovery and reuse.

[0066] In this embodiment, the conveying device 42 controls the holder 41 to move up and down between the outside and the first temperature adjustment section 212 and the third temperature adjustment section 214. However, in another embodiment, the first temperature adjustment section 212 and the third temperature adjustment section 214 can be connected laterally to the outside, and the conveying device 42 can be designed accordingly.

[0067] 16, the present invention relates to a third embodiment of a recovery device 200 for a layered structure 900 bonded by a solidified adhesive, and the difference between the second embodiment and the third embodiment lies in the structural design of the container facility 2, the cooling device 69, and the transport facility 4, and the step design of the recovery method. For the sake of explanation, only the differences between these embodiments will be described.

[0068] In the third embodiment, the temperature control space 211 only has the first temperature control section 212 and the second temperature control section 213, and the transport device 42 can be controlled to transport the holder 41 among the outside, the first temperature control section 212, the second temperature control section 213, and the recovery processing space 310. The cooling device 69 is installed in the first temperature control section 212.

[0069] The door unit 22 only has the first door 221, and the door unit 22 is controlled to change between the first position and the second position. When the door unit 22 is in the first position, the first temperature control section 212 is connected to the outside, and the first door 221 isolates the second temperature control section 213 from the collecting and processing space 310. When the door unit 22 is in the second position, the first door 221 closes the first temperature control section 212 from the outside, and connects the second temperature control section 213 to the collecting and processing space 310.

[0070] 4, 6 and 16, the differences between the method of recovering and treating the layered structure 900 by the recovery device 200 and the second embodiment will be described.

[0071] In the heating step 812 of the heat treatment medium preparation step 81, the controller 74 executes a medium heating program, controls the door unit 22 to the second position, and controls the heat preservation devices 61, 62 to heat and preserve the molten salt 910 in the molten salt container 51 and the recovery treatment space 310.

[0072] In the pre-heating step 82, the controller 74 executes a pre-heating program, changes the door unit 22 to the first position, controls the conveying device 42 to move the holder 41 to the first temperature adjustment section 212, and then changes the door unit 22 to the second position again. The controller 74 controls the conveying device 42 to hold the holder 41 in the first temperature adjustment section 212, where it remains for an initial pre-heating time. Thereafter, the controller 74 controls the conveying device 42 to move the holder 41 to the second temperature adjustment section 213, where it remains for a high-temperature pre-heating time.

[0073] In the recovery processing step 83, the controller 74 executes the recovery processing program and controls the conveying device 42 to move the holder 41 to the empty recovery processing space 310, and starts to inject molten salt until the liquid level of the molten salt completely covers the top of the layered structure 900. After that, the holder 41 stays in the recovery processing space 310 for a processing time, during which the molten salt 910 comes into contact with the solidified adhesive of the layered structure 900 in the holder 41 and gradually decomposes.

[0074] In the cooling step 84, the controller 74 executes a cooling program. The controller 74 pumps the molten salt 910 in the recovery processing space 310 back to the molten salt container 51, so that the molten salt 910 remaining in the recovery processing space 310 does not soak into the bottom of the layered structure 900. After that, the controller 74 controls the conveying device 42 to move the holder 41 from the recovery processing space 310 where the molten salt is discharged to the second temperature adjustment section 213, and stays in the second temperature adjustment section 213 for a first cooling time, thereby initially cooling the layered object (not shown) in the holder 41. Next, the controller 74 controls the conveying device 42 to move the holder 41 to the first temperature adjustment section 212, and stays in the first temperature adjustment section 212 for a second cooling time, and starts the cooling device 69 to use the heat dissipation airflow 690 to accelerate the cooling of the layered object in the holder 41. Next, the controller 74 changes the door unit 22 to the first position, connects the first temperature-controlling section 212 to the outside, keeps the holder 41 in the first temperature-controlling section 212 for a third cooling time, and continues to operate the cooling device 69 to accelerate the cooling of the layered object.

[0075] In the discharge step 85, the controller 74 controls the transport device 42 to move the holder 41 out of the first temperature control section 212, and then completes the recovery processing program.

[0076] In the third embodiment, by using the structural design of the chamber equipment 2, the cooling device 69, and the conveying equipment 4, and the control function design of the control equipment, the molten salt 910 can be used to perform the recovery process of the layered structure 900, and the volume of the recovery equipment can be reduced.

[0077] 17 is a structural diagram of a fourth embodiment of the recovery device for a layered structure of solidified adhesive according to the present invention. In the fourth embodiment, the platform structure of the recovery device is designed to be horizontal, and the transfer device only moves horizontally and does not need to move up and down. The recovery device also includes a bucket device with one tank 31, a molten salt supply device 5 with molten salt 910 in the connected tank 31, a heating device 61 (installed in the molten salt supply device 5), a heat retention device 62 in contact with the tank 31, a cooling device 69, a transfer device 4, and a control device 7.

[0078] The control equipment 7 is signal-connected to the chamber equipment 2, the bucket equipment, the molten salt supply equipment 5, the heating equipment 61, the heat retention equipment 62, the cooling equipment 69, and the transfer equipment 4. The molten salt supply equipment 5 includes the molten salt container 51 and the pump equipment 53 (including the transport pipe 52). The control equipment 7 includes the first temperature sensor 71, the liquid level sensor 72, the second temperature sensor 73, and the controller 74. The structures, connections, and functions of these components in the fourth embodiment of the recovery device are the same as those in the first embodiment, so details will be omitted. In the fourth embodiment shown in Figure 17, the chamber facility 2 of the recovery device has five spaces arranged horizontally, which are, in order, an input area 241, a preheating area 242, a recovery tank area 243, a cooling area 244, and an output area 245. Each area is equipped with openable and closable gates 225, 226, 227, and 228. In particular, the recovery tank area 243 is equipped with sealed gates 226 and 227 to prevent liquid leakage.

[0079] The charge input area 241 communicates with the outside, and the temperature of the charge input area 241 is approximately close to the outside temperature, generally between 10-50°C. The carrier 41 carrying the layered structure 900 is moved in parallel to the charge input area 241 by the transfer device 42 on the track unit 40 at the outside temperature. Then, the first gate 225 located between the charge input area 241 and the preheating area 242 is opened, and the transfer device 42 moves the carrier 41 and the layered structure 900 in parallel to the preheating area 242, and then closes the first gate 225. Since the preheating area 242 is adjacent to the recovery tank area 245, the temperature of the preheating area 242 is heated to 100-200°C by the high temperature of the tank body 31 in the recovery tank area 245. The holder 41 and the layered structure 900 stay in the preheating area 242 for 10 minutes to 1 hour, and the temperature of the holder 41 and the layered structure 900 is also preheated to 100 to 200°C. At this time, the tank 31 in the recovery tank area 243 is empty, molten salt has not yet been poured into it, and a high temperature of 200 to 550°C is maintained by the heat retention device 62. After that, the second gate 226 located between the preheating area 242 and the recovery tank area 243 opens, and the transfer device 42 moves the holder 41 and the layered structure 900 in parallel to the empty tank 31 in the recovery tank area 243, and closes the second gate 226. At this time, the third gate 227 located between the recovery tank area 243 and the cooling area 244 is also closed. Next, the high-temperature liquid molten salt 910 at 200-550°C in the molten salt container 51 is poured into the tank 31 in the recovery tank area 243 until the molten salt 910 completely covers the top of the layered structure 900. The holder 41 and the layered structure 900 are immersed in the molten salt 910 in the tank 31 in the recovery tank area 243 for 10 minutes to 1 hour, and the temperature of the molten salt 910 in the tank 31 is kept at 300-550°C by the heat retention device 62, so that the adhesive of the layered structure 900 is cracked and the layered object is separated. After that, the molten salt 910 in the tank 31 is pumped back to the molten salt container 51 until the tank 31 is emptied, and then the third gate 227 is opened, and the transfer device 42 moves the holder 41 and the layered structure 900 in parallel to the cooling area 244.Then, the third gate 227 is closed, the cooling device 69 is started, and the temperature of the holder 41 and the layered structure 900 in the cooling area 244 is cooled for 10 minutes to 1 hour. After the temperature of the holder 41 and the layered structure 900 drops to below 200°C, the fourth gate 228 between the cooling area 244 and the outside 245 is opened, and the holder 41 and the layered structure 900 are moved in parallel to the outside by the transfer device 42.

[0080] In the fourth embodiment, the track unit 40 is a circular track, on which a number of transfer devices 42 are installed, and each transfer device 42 is connected to move a set of the holder 41 and the layered structure 900 in parallel. The recovery process adopts a continuous batch processing mode, for example, while a set of the holder 41 and the layered structure 900 is performing the cracking operation in the recovery tank section 243, the previous set has already completed the cracking operation and is performing the cooling operation in the cooling section 244, and at the same time, the next set is performing the preheating operation in the preheating section 242. This not only greatly improves the recovery efficiency of the recovery method of the present invention, but also makes it unnecessary for the transfer device 42 to lift the holder 41 up and down, so that the mechanism is simple and the maintenance is easy.

[0081] In another embodiment not shown in the figure, the tank 31 has a double-layer design, and the inner layer of the tank 31 is a recovery treatment space, which accommodates the holder 41 and the layered structure 900. A layered space for injecting molten salt is provided in the tank wall, and liquid molten salt is injected into the layered space after the temperature of the inner layer recovery treatment space reaches about 150-200°C. At this time, the holder 41 and the layered structure 900 do not directly contact with the molten salt, and the high temperature of the molten salt causes the temperature of the layered space and the tank wall of the tank 31 to rise to 200-550°C, and the layered structure 900 in the inner layer recovery treatment space is cracked at high temperature.

[0082] In another embodiment not shown in the figures, the holder 41 has a sealed design, and the layered structure 900 is completely covered by the holder 41 and is directly immersed in the high-temperature molten salt, so that the layered structure and the molten salt do not come into direct contact with each other, and only the high temperature of 200-550°C is required for the layered structure 900 in the inner layer recovery treatment space to be cracked at high temperature.

[0083] As described above, the present invention uses the structural design of the tank device 3 and the molten salt supplying device 5, the structural design of the recovery processing space 310 and the temperature control space 211 of the chamber 21, the structural design of the gate unit 22, and the structural design of the transfer equipment 4 and the control equipment 7 to heat and split the solidified adhesive 902 of the structure 900, and the adhesive 902 is used to bond and separate the layered object 901, thereby obtaining a layered object 901 with a complete structure. When used in the recovery processing of solar cell modules, a glass cover, back plate, and photoelectric plate with a complete structure can be obtained, which can certainly improve the shortcomings of the existing recovery methods such as direct heating and splitting, mechanical peeling, or scraping. Therefore, the recovery device 200 and recovery method of the layered object 900 using the solidified adhesive of the present invention are indeed a very innovative, convenient, and practical invention, and can certainly achieve the object of the present invention.

[0084] However, the above content is merely an embodiment of the present invention and does not limit the scope of the present invention. Simple equivalent changes and modifications based on the content described in the claims and patent specification of the present invention are also included in the patent scope of the present invention. [Explanation of symbols]

[0085] 200: Recycling equipment 2: Chamber equipment 21: Chamber 211: Temperature control space 212, 213, 214: Temperature control section 22: Door unit 221, 222: Door 225, 226, 227, 228: Gate 223: Driver" 241: Input area 242: Preheating area 243: Recycling tank area 244: Cooling area 245: Discharge Area 3: Tank device 31: Tank 310: Recycling processing space 32: Cover body 4:Transportation equipment 40: Rail unit 41: Holder 410: Compartment Space 411: Rod 42:Transportation device 5: Molten salt supply device 51: Molten salt container 52: Transport pipe 53: Pump equipment 61:Heating device 62: Heat retention device 69: Cooling device 690: Cooling airflow 7: Control device 71, 73: Temperature sensor 72: Liquid level sensor 74: Controller 81~85, 811, 812, 831~834: Procedure 900: Layered structure 901: Layered object 901a: Glass cover 901b: Photoelectric board 901c: Backplate 902: Glue 910: Molten salt

Claims

1. A recovery device for layered structures solidified with an adhesive, comprising at least one holder, each of which accommodates a plurality of layered structures; at least one tank, each of which has a recovery processing space and accommodates the holder; and one molten salt container, which accommodates molten salt; a heating device connected to the molten salt container for heating the molten salt in the container; at least one pumping device connected to the molten salt container and the tank for delivering the molten salt to a recovery and processing space of the tank and returning the molten salt in the recovery and processing space to the molten salt container; a heat retention device connected to the tank for heating the molten salt contained in the recovery and treatment space in the tank; a transfer device capable of feeding or removing the tool together with the plurality of layered structures contained within the tool into or from the collection and processing space of the tank; A control device is connected to the heating device, the pump device, the heat retention device, and the transport device by signals; Controlling a heating device to heat the molten salt contained in the molten salt container to bring it into a molten state; Controlling the transfer device and operating the transfer device, when the liquid level of the molten salt in the recovery and processing space of the tank falls below a predetermined low water level, sending the holder and the plurality of layered structures contained in the holder into the recovery and processing space of the tank; Controlling the pump device and operating the pump device to accommodate the holder and the plurality of layered structures in the recovery and processing space of the tank, transporting the molten salt accommodated in the molten salt container to the recovery and processing space of the tank, and continuing this process until the liquid level of the molten salt in the recovery and processing space reaches a predetermined high water level; Controlling the heat retention device to heat the molten salt in the recovery and treatment space of the tank and maintain the molten salt in the recovery and treatment space at a predetermined heat retention temperature; When the liquid level of the molten salt transported into the recovery and processing space reaches a scheduled high water level, the control device starts timing a scheduled processing time, and when the timing ends, controls the pump device to return the molten salt in the recovery and processing space to a molten salt container while the holder and the multiple layered structures are in the recovery and processing space, and continues this process until the liquid level of the molten salt in the recovery and processing space falls below the scheduled low water level; When the timing of the scheduled processing time ends and the liquid level of the molten salt in the recovery processing space falls below the scheduled low water level, the control device controls the transfer device, which transfers the holder and the multiple layered structures contained in the device from the recovery processing space of the tank, the scheduled low water level being lower than the bottom of the multiple layered structures in the device, and the scheduled high water level being higher than the top of the multiple layered structures in the device.

2. a cavity device and a cooling device, the cavity device including a cavity and a door unit attached to the cavity; A temperature-adjusting space is defined within the cavity, the temperature-adjusting space being in communication with the recovery and treatment space; the door unit is controlled by the control device and changes between a first position in which the temperature control space communicates with the outside and the collecting and processing space is closed, and a second position in which the temperature control space is isolated from the outside and the temperature control space communicates with the collecting and processing space; The temperature control space includes a first temperature control section communicating with the outside, and a second temperature control section communicating the first temperature control section with the collection and treatment space, the door unit includes a first door, the door unit is in a first position, the first door seals the second temperature control section and the collection and treatment space, the first temperature control section communicates with the outside, the door unit is in a second position, the first door is sealed, the first temperature control section is isolated from the outside, and the second temperature control section communicates with the collection and treatment space, The control device activates a recovery function, executes a preheating process, executes a recovery treatment process, and executes a cooling process. When the control device executes the preheating process, the control device controls the transfer device to transfer the holder from the outside to the first temperature adjustment section; Then, the door unit is changed to the second position, and after an initial pre-heating time has elapsed, the transfer device is controlled to transfer the holder to the second temperature control section, where it remains for a high temperature pre-heating time, and the control device executes the recovery treatment process, controls the transfer device, and transfers the holder to the recovery treatment space; the control device executes a cooling process, controls the transfer device to transfer the tool from the recovery processing space to the second temperature adjustment section, where the tool stays for the first cooling time, controls the transfer device to transfer the tool to the first temperature adjustment section, where the tool stays for a second cooling time, changes the door unit to the first position, and controls the transfer device to transfer the tool from the first temperature adjustment section; The recycling apparatus and method for solidified bonded layered structures according to claim 1, characterized in that the cooling device is installed in the chamber, a signal is connected to the control device, the cooling device is controlled by the control device, a heat dissipation air flow is generated in the first temperature control section, the control device executes the cooling process, controls the transport device, transports the holder to the first temperature control section, and starts and controls the cooling device during the second cooling time.

3. There is one cavity device and one cooling device, the one cavity device including a cavity and a door unit attached to the cavity; The interior of the cavity defines a temperature-controlled space, the temperature-controlled space communicates with the recovery processing space, and the door unit is controlled by the control device to change between a first position in which the temperature-controlled space communicates with the outside and closes the recovery processing space, and a second position in which the temperature-controlled space is isolated from the outside and communicates with the recovery processing space, The temperature control space includes a first temperature control section communicating with the outside, a third temperature control section, and a second temperature control section communicating between the first temperature control section and the second temperature control section and communicating with the upper part of the recovery processing space; the door unit is controlled to change between the first position, the second position, and a third position; when the door unit is in the first position, the first temperature control section communicates with the outside, the recovery processing space and the second temperature control section are separated, and the third temperature control section is also separated from the outside; When the door unit is in the second position, the collecting and processing space communicates with the second temperature control section, and the first temperature control section is isolated from the outside, and the third temperature control section is isolated from the outside; the door unit is in the third position, the third temperature control section is connected to the outside, the recovery processing space is isolated from the second temperature control section, and the first temperature control section is isolated from the outside; the control device starts the recovery function, and a preheating process, one recovery processing process, and one cooling process are performed; The control device executes a pre-heating process, controls the transfer device to move the holder from outside to the first temperature adjustment section, changes the door unit to the second position, and after an initial pre-heating time, controls the transfer device to move the holder to the second temperature adjustment section and stay there during a high temperature pre-heating time; the control device executes the recovery treatment process, controls the transfer device, and moves the holder to the recovery treatment space; the control device executes the cooling process, controls the transfer device, and moves the holder from the recovery treatment space to a second temperature adjustment section, where it stays for a first cooling time; controls the transfer device to move the holder to a third temperature adjustment section, where it stays for a second cooling time; changes the door unit to a third position, and controls the transfer device to move the holder from the third temperature adjustment section to the outside; 2. The recycling apparatus and method for a solidified and bonded layered structure according to claim 1, wherein the cooling device is installed in the cavity and is signal-connected with the control device, the cooling device is controlled by the control device to generate a cooling airflow in the third temperature-adjusting section, the control device executes the cooling process, controls the transport device, moves the holder during the second cooling time period of the third temperature-adjusting section, and operates the cooling device, so that the temperature of the first temperature-adjusting section is maintained between 100 and 200°C, the temperature of the second temperature-adjusting section is maintained at 200 and 350°C, the temperature of the third temperature-adjusting section is lower than 200°C, and the temperature of the molten salt in the tank is maintained at a high temperature of 300 and 550°C by a heat-insulating device.

4. The control device includes a liquid level sensor installed in the tank and a first temperature sensor installed in the molten salt vessel; The liquid level sensor can detect the liquid level of the molten salt in the recovery and treatment space, and inject the molten salt into the recovery and treatment space. When the control device determines that the liquid level has reached a predetermined high water level based on the measurement by the liquid level sensor, it stops injecting the molten salt. The control device controls the pump device to return the molten salt in the recovery processing space to the molten salt container, and when the liquid level sensor measures the liquid level and determines that the liquid level has fallen below a scheduled low water level, stops the operation of the pump device. The recycling device and method for solidified and bonded layered structures as described in claim 3, characterized in that the first temperature sensor detects the temperature of the molten salt in the molten salt container, and the control device starts the recovery processing program, measures the first temperature sensor, and when the temperature of the molten salt reaches a predetermined melting temperature, controls the pump device to start transporting the molten salt contained in the molten salt container to the recovery processing space of the tank.

5. The recycling device and method for a solidified-bonded layered structure according to claim 4, characterized in that the molten salt is prepared by adding one pure potassium element to one potassium nitrate molten salt, so that the weight ratio of potassium in the prepared molten salt is higher than the weight ratio of potassium in the pure potassium nitrate molten salt, the weight of the pure potassium element added to the potassium nitrate molten salt is in the range of 5% to 15% by weight of the potassium nitrate molten salt, and the proportion of potassium in the molten salt is in the range of 41.6% to 46.68%.

6. 1. A method for recovering a layered structure for a solidified adhesive, comprising the steps of: A heat treatment medium preparation step includes preparing a molten salt composition containing potassium nitrate as a main component, placing the prepared molten salt in a molten salt container, and using a heating device to heat the molten salt in the molten salt container to a predetermined heat treatment temperature to make the molten salt liquid; In one preheating step, one control device controls one transfer device to move one holder containing a plurality of layered structures to one temperature-controlled space, and a preheating process is performed to reduce the temperature difference between the layered structures and the molten salt. The recovery process step includes the following steps: In the step of arranging one layered structure, the control device controls the transfer device to arrange the holder containing the layered structure having completed the preheating treatment in a recovery treatment space of one tank, and the height of the liquid level of the molten salt in the tank is insufficient to immerse the bottom of the layered structure; In one molten salt filling step, the control device heats to a predetermined heat treatment temperature, and injects the molten salt from the molten salt container into the recovery and treatment space of the tank until the liquid level of the molten salt completely covers the top of the layered structure, and the control device uses a heat preservation device to heat and maintain the molten salt in the recovery and treatment space of the tank at a predetermined heat preservation temperature; In one molten salt thermal decomposition treatment step, the layered structure is immersed in the molten salt in the recovery treatment space, and the adhesive of the layered structure is kept in contact with the molten salt for a treatment time, and the treatment The adhesive is used to fix the layered objects, and the layered objects are separated to obtain a recovered product. In the removal step of one recovered product, after the processing time is over, the control device controls one pump equipment to pump the molten salt in the recovery processing space back to the molten salt container until the liquid level of the molten salt in the recovery processing space becomes lower than the bottom of the layered structure; In one cooling step, the control device controls a transfer device, and after the treatment time ends and the liquid level of the molten salt in the recovery treatment space becomes lower than the bottom of the layered structure, the holder and the recovered product are moved to a temperature-controlled space for cooling treatment, and in one discharge step, the control device controls a transfer device, and after the recovered product has completed the cooling treatment, the recovered product is moved from the temperature-controlled space.

7. The recycling apparatus and method for solidified and bonded layered structures as described in claim 6, characterized in that the temperature-control space has a first temperature-control section and a second temperature-control section connecting the recovery processing space and the first temperature-control section, and in the preheating step, the transfer device is used to first transfer the layered structure to the first temperature-control section, where it remains for an initial preheating time, and then the transfer device is used again to transfer the layered structure to the second temperature-control section, where it remains for a high-temperature preheating time, and the recovery processing step is then continuously performed.

8. In the cooling step, the transfer device is used to transfer the recovered product to the second temperature control section, and the recovered product is retained for a first cooling time; the transfer device is controlled to transfer the recovered product to the first temperature control section; The recycling device and method for solidified bonded layered structures as claimed in claim 7, characterized in that the material is retained for a second cooling time, and during the second cooling time, a cooling device is controlled to generate a heat dissipation air flow that flows through the recovered product in the first temperature control section, and a material discharge step is performed.

9. The temperature control space further includes a third temperature control section, and the second temperature control section communicates with the first temperature control section, the third temperature control section, and the recovery processing space; In the cooling step, the transfer device moves the recovered product to the second temperature adjustment section, and after the first cooling time, the recovered product is moved to the third temperature adjustment section, where the recovered product is retained for the second cooling time. The second cooling time is controlled, and the cooling device blows a cooling air current on the recovered product in the third temperature adjustment section to dissipate heat. Then, a discharge step is performed. The recycling apparatus and method for solidified and bonded layered structures according to claim 7, wherein the temperature of the first temperature-regulating section is maintained at 100-200°C, the temperature of the second temperature-regulating section is maintained at 200-350°C, the temperature of the third temperature-regulating section is less than 200°C, and the temperature of the molten salt in the tank is maintained at a high temperature of 300-550°C by a heat-insulating device.

10. The recycling device and method for solidified and bonded layered structures according to claim 9, characterized in that in the heat treatment medium preparation step, the composition of the prepared molten salt is such that an additional pure potassium element is added to one potassium nitrate molten salt, the weight percentage of potassium in the prepared molten salt is higher than the potassium content in pure potassium nitrate molten salt, the weight ratio of the pure potassium element added to the potassium nitrate molten salt is in the range of 5% to 15% of the total potassium nitrate molten salt, and the proportion of potassium component in the molten salt is in the range of 41.6% to 46.68%.

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