Thermal decomposition device

Abstract

To remove a plastic material layer from a panel having a material layer safely.SOLUTION: A thermal decomposition apparatus includes: a thermal decomposition device mechanism part 4 including a thermal decomposition furnace 300 which decomposes a panel 2 having a plastic material layer; and a superheated steam generator 5 which generates superheated steam supplied to the thermal decomposition furnace 300. A furnace body 301 of the thermal decomposition furnace 300 includes: a metallic inner wall member 303 having a space for housing the panel 2; and a metallic outer wall member 302 enclosing the inner wall member 303. The furnace body 301 includes a heat insulation material layer 313, enclosing the inner wall member 302, and a heat storage material layer 312, provided between the inner wall member 302 and the heat insulation material layer 313, between the inner wall member 303 and the outer wall member 302.SELECTED DRAWING: Figure 13

Description

[Technical field]

[0001] The present invention relates to a pyrolysis device for decomposing panels having layers of plastic material. [Background technology]

[0002] One example of a panel having a plastic material layer is a solar cell panel. The solar cell panel includes solar cells held by a plastic material layer on one side of a cover glass, and wiring members connected to the solar cells. Since such solar cell panels contain various reusable metals and glass, it is preferable that used solar cell panels be disassembled and reused.

[0003] A known method for disassembling a solar cell panel involves heating the solar cell panel in a furnace in an atmospheric air environment to burn off the plastic materials and separate the cover glass from the solar cell and wiring members (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-165150 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the method disclosed in Patent Document 1, the solar cell panel is heat-treated at high temperatures in a furnace in an air atmosphere, which poses the risk of fires and the like in the furnace.

[0006] The present invention has been made to improve this current situation. [Means for solving the problem]

[0007] The pyrolysis device of the present invention comprises a pyrolysis device mechanism section including a pyrolysis furnace for decomposing a panel having a plastic material layer, and a superheated steam generator for generating superheated steam to be supplied to the pyrolysis furnace. The pyrolysis furnace includes a superheated steam inlet section for introducing superheated steam into the furnace body, and a gas outlet section for discharging gas in the furnace body to the outside of the furnace body, and the superheated steam inlet section includes an injection section for injecting superheated steam used for pyrolysis of the panel inside the furnace body, and an exhaust port-directed injection section for injecting superheated steam toward a gas exhaust port of the gas outlet section for injecting superheated steam. It is something that is prepared.

[0008] According to the pyrolysis apparatus of the present invention, since the panel is heated using superheated steam, the panel having the plastic material layer can be heated in a superheated steam atmosphere containing almost no oxygen, and fires and the like in the pyrolysis furnace can be prevented, and the treatment can be performed safely. do.

[0015] The pyrolysis apparatus of the present invention According to the present invention, by injecting superheated steam toward a gas exhaust port inside the furnace body, the gas discharged from within the furnace body can be heated within the furnace body immediately before it is sucked into the gas exhaust port, and the components contained in the gas discharged from within the furnace body can be thermally decomposed. Effect of the Invention

[0016] The pyrolysis device of the present invention can remove the plastic material layer of the panel without emitting gases that have a high environmental impact, and furthermore, when the panel is a solar panel, it can disassemble the solar panel into solar cells containing recyclable raw materials such as silicon, and recyclable metals and glass. [Brief description of the drawings]

[0017] [Figure 1] 1 is a schematic diagram showing a pyrolysis device according to an embodiment; [Diagram 2] FIG. 1 is a side view illustrating an example of a pyrolysis furnace. [Diagram 3] FIG. 1 is a side view illustrating an example of a gas cooling device. [Figure 4] FIG. 2 is a side view illustrating another example of a pyrolysis furnace. [Diagram 5] FIG. 11 is a side view illustrating a schematic diagram of another example of a gas cooling device. [Figure 6] FIG. 2 is a side view illustrating a schematic diagram of yet another example of a pyrolysis furnace. [Figure 7]FIG. 2 is a side view illustrating a schematic diagram of yet another example of a pyrolysis furnace. [Figure 8] FIG. 11 is a plan view illustrating a schematic diagram of yet another example of a pyrolysis furnace. [Figure 9] FIG. 2 is a side view showing the pyrolysis furnace according to the first embodiment; [Figure 10] FIG. 2 is a plan view showing the pyrolysis furnace and a tray moving cart. [Figure 11] FIG. 2 is a side view showing the pyrolysis furnace and the tray moving cart. [Figure 12] 11A and 11B are diagrams illustrating still another example of a gas cooling device, in which (A) is a plan view and (B) is a side view. [Figure 13] FIG. 2 is a plan view, partially in cross section, illustrating a further example of a pyrolysis furnace. [Figure 14] FIG. 2 is a side view showing the pyrolysis furnace in partial cross section. [Figure 15] 14 is a cross-sectional view taken along line AA in FIG. 13. [Figure 16] FIG. 2 is a cross-sectional view showing the pyrolysis furnace with its opening open. [Figure 17] FIG. 2 is a plan view, partially in cross section, illustrating a further example of a pyrolysis furnace. [Figure 18] FIG. 2 is a side view showing the pyrolysis furnace in partial cross section. [Figure 19] FIG. 2 is a side view, partially in cross section, illustrating a schematic diagram of yet another example of a pyrolysis furnace. [Figure 20] FIG. 2 is a plan view, partially in cross section, illustrating a further example of a pyrolysis furnace. [Figure 21] FIG. 2 is a side view showing the pyrolysis furnace in partial cross section. [Figure 22] FIG. 2 is a front cross-sectional view illustrating yet another example of a pyrolysis furnace. [Figure 23] FIG. 11 is a front cross-sectional view illustrating another example of the panel support base. [Figure 24] 1(A) and 1(B) are cross-sectional views each showing a schematic diagram of another example of a pyrolysis furnace. [Diagram 25] FIG. 2 is a side view, partially in cross section, illustrating a schematic diagram of yet another example of a pyrolysis furnace. [Figure 26] FIG. 2 is a side view showing the pyrolysis furnace in partial cross section. [Figure 27] FIG. 2 is a block diagram illustrating a cooling system of the gas cooling device. [Figure 28] FIG. 11 is a block diagram illustrating another example of a cooling system of a gas cooling device. [Figure 29] FIG. 2 is a side view, partially in cross section, illustrating another example of a pyrolysis furnace. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] An embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a schematic diagram showing one embodiment of a pyrolysis device. The pyrolysis device 1 is equipped with a pyrolysis device mechanism 4 including a pyrolysis furnace 3 for decomposing a panel 2 having a plastic material layer, and a superheated steam generator 5 for generating superheated steam to be supplied to the pyrolysis furnace 3. The pyrolysis device mechanism 4 is equipped with a gas cooler 6 for cooling and solidifying exhaust gas from the pyrolysis furnace 3, which contains components of the plastic material layer vaporized in the pyrolysis furnace 3.

[0019] The superheated steam generated in the superheated steam generator 5 is supplied to the pyrolysis furnace 3 via a superheated steam pipe 7. The exhaust gas from the pyrolysis furnace 3 is introduced into the gas cooler 6 via an exhaust gas pipe 8. The gas exhausted from the gas cooler 6 is exhausted to the outside of the pyrolysis device mechanism 4 via an exhaust fan 10 and a filter 11 provided in an exhaust pipe 9.

[0020] The panel 2 is, for example, a solar cell panel, and includes a cover glass, solar cells held by a plastic material layer on one side of the cover glass, metal wiring members electrically connected to the solar cells, and a back film covering the surface of the plastic material layer opposite the cover glass. Note that the metal frame attached to the periphery of the solar cell panel has been removed from the panel 2.

[0021] As shown in FIG. 2, the pyrolysis furnace 3 comprises a furnace body 31 having an internal space, a superheated steam inlet pipe 32 to which an end of the superheated steam piping 7 is connected and which is led from the outside of the furnace body 31 to the inside, a gas outlet pipe 33 which leads to the internal space of the furnace body 31 and is connected to the exhaust gas piping 8, and a conveying section 34 which conveys the panel 2 and passes through the furnace body 31.

[0022] The superheated steam introduction pipe 32 includes a main steam piping section (main piping section) 35 that extends in the vertical direction while penetrating the upper surface of the furnace body 31, an upper steam piping section (branch piping section) 36 that branches off from an upper portion of the main steam piping section 35 in the furnace body 31, and a lower steam piping section (branch piping section) 37 that connects to the lower end of the main steam piping section 35. The main steam piping section 35 is provided in an upstream portion of the furnace body 31 with respect to the conveying direction of the conveying section 34. The upper steam piping section 36 is provided above the conveying section 34 in a zigzag shape that is folded back multiple times in a substantially horizontal plane. The lower steam piping section 37 is provided below the conveying section 34 in a zigzag shape that is folded back multiple times in a substantially horizontal plane.

[0023] The upper steam piping section 36 is provided with a plurality of upper nozzles 38 which inject superheated steam downward. The lower steam piping section 37 is provided with a plurality of lower nozzles 39 which inject superheated steam upward. That is, the upper nozzles 38 and the lower nozzles 39 are arranged so as to sandwich the panel 2 in the pyrolysis furnace 3. The upper nozzles 38 and the lower nozzles 39 are arranged along the length and breadth of a horizontal plane parallel to the panel 2 in the pyrolysis furnace 3, and are arranged, for example, in a lattice or staggered pattern in plan view.

[0024] In the pyrolysis furnace 3, the gas outlet pipe 33 is provided on the upper surface of the furnace body 31, at a downstream portion in the conveying direction of the conveying section 34. One end of the exhaust gas piping 8 is connected to the gas outlet pipe 33. The conveying section 34 is configured so that the panel 2 can be placed thereon, and conveys the panel 2 so as to pass through the furnace body 31.

[0025] As shown in FIG. 3, the gas cooling device 6 includes a sealed tank portion 61 that contains water 60, an exhaust gas inlet pipe 62 to which the other end of the exhaust gas piping 8 is connected and which leads from the outside to the inside of the sealed tank portion 61, and a gas outlet pipe 63 that leads to the internal space of the sealed tank portion 61 and is connected to the exhaust pipe 9.

[0026] The exhaust gas introduction pipe 62 is provided to extend in the vertical direction, penetrating the upper surface of the sealed tank portion 61. The upper end of the exhaust gas introduction pipe 62 is provided to protrude upward from the upper surface of the sealed tank portion 61, and is connected to the exhaust gas piping 8. The lower end of the exhaust gas introduction pipe 62 is located at the lower part inside the sealed tank portion 61, and is immersed in the water 60 contained in the sealed tank portion 61.

[0027] The gas outlet pipe 63 is provided to extend in the vertical direction, penetrating the upper surface of the sealed tank portion 61 at a position different from the exhaust gas introduction pipe 62. The lower end of the gas outlet pipe 63 is located at the upper portion within the sealed tank portion 61 and is not submerged in the water 60. The upper end of the gas outlet pipe 63 is provided to protrude upward from the upper surface of the sealed tank portion 61, and is connected to the exhaust pipe 9.

[0028] 3, exhaust pipe 9 is provided with an exhaust fan 10 and a filter 11 in this order from the downstream side in the gas flow direction. The exhaust fan 10 operates to move the gas in exhaust pipe 9 from the gas cooling device 6 to the filter 11 side.

[0029] Next, a method for decomposing the panel 2 by the pyrolysis device 1 will be described. As shown in Fig. 3, the panel 2 is placed on the conveying section 34 at a position upstream of the pyrolysis furnace 3 in the conveying direction, and is transferred into the furnace body 31 of the pyrolysis furnace 3 by driving the conveying section 34.

[0030] Superheated steam is supplied from a superheated steam generator 5 through a superheated steam pipe 7 into the furnace body 31. The superheated steam supplied to the pyrolysis furnace 3 is introduced into the superheated steam introduction pipe 32 of the pyrolysis furnace 3 and is sprayed into the furnace body 31 from the upper nozzle 38 and the lower nozzle 39. The inside of the furnace body 31 is filled with superheated steam and is in a superheated steam atmosphere containing almost no oxygen. The temperature inside the furnace body 31 is, for example, 400 to 1200 degrees, and preferably 600 degrees or higher.

[0031] The panel 2 having the plastic material layer transferred into the furnace body 31 is heated to 600°C or more in a superheated steam atmosphere, and the plastic resin constituting the plastic material layer sublimes and vaporizes. If the panel 2 is a solar panel, the plastic material layer of the panel 2, such as the filler, adhesive, and back film, is sublimated and removed, and the panel 2 is separated into the cover glass, solar cell, and metal wiring member.

[0032] Here, the multiple upper nozzles 38 and lower nozzles 39 that spray superheated steam are arranged to sandwich the panel 2, so that the panel 2 can be efficiently heated from both sides, accelerating the decomposition of the panel 2 and shortening the processing time.

[0033] By driving the exhaust fan 10, the pressure inside the gas cooler 6 becomes negative, and a gas flow from the pyrolysis furnace 3 to the gas cooler 6 is generated in the exhaust gas piping 8. The gas inside the furnace body 31 is exhausted to the outside of the pyrolysis furnace 3 through the gas outlet pipe 33. The exhaust gas containing the plastic resin components exhausted from the pyrolysis furnace 3 is sent to the gas cooler 6 through the exhaust gas piping 8 and introduced into the sealed tank section 61 through the exhaust gas introduction pipe 62.

[0034] The exhaust gas containing the vaporized plastic resin components is discharged from the lower end of the exhaust gas introduction pipe 62 into the sealed tank section 61 and passes through the water 60. At this time, the exhaust gas is cooled, and the vaporized plastic resin components are coagulated and solidified, and precipitate in the sealed tank section 61. This makes it possible to prevent most of the gases that have a high environmental load, such as carbon oxides and hydrocarbon gases, from being discharged to the outside of the gas cooling device 6.

[0035] The gas ejected from the exhaust gas introduction pipe 62 and passing through the water 60 is discharged from the sealed tank portion 61 through the gas outlet pipe 63 to the exhaust pipe 9 outside the gas cooling device 6. The discharged gas is released into the surrounding atmosphere (atmosphere) through the exhaust fan 10 and the filter 11 provided in the exhaust pipe 9. Note that a mesh member or a porous member may be provided at the lower end (tip) of the exhaust gas introduction pipe 62 to disperse and reduce the size of the air bubbles ejected from the exhaust gas introduction pipe 62, thereby increasing the contact area between the water and the exhaust gas.

[0036] In this embodiment, harmful gases in the exhaust gas from the pyrolysis furnace 3 are solidified in the gas cooler 6 and then removed through the filter 11 in the exhaust pipe 9, so that exhaust of harmful gases to the outside can be reliably prevented.

[0037] In the pyrolysis furnace 3, the panel 2 from which the plastic material layer has been removed is transported to the outside of the pyrolysis furnace 3 downstream in the transport direction by the drive of the transport unit 34, and is recovered. If the panel 2 is a solar panel, the recovered panel 2 is separated into a cover glass, solar cell, and metal wiring member, and is recycled.

[0038] In this manner, in this embodiment, by heating the panel 2 having a plastic material layer with high-temperature superheated steam in the pyrolysis furnace 3, the plastic material layer is sublimated and vaporized, and can be removed from the panel 2. Furthermore, by passing the gas containing the plastic material components sublimated in the pyrolysis furnace 3 through the water in the gas cooling device 6 to solidify, and precipitating the solid plastic material in the gas cooling device 6, it is possible to prevent most of the gases that have a high environmental load, such as carbon dioxide and hydrocarbon gases, from being exhausted outside the gas cooling device.

[0039] In addition, because the object of treatment in the pyrolysis device 1 is a panel 2 (plate-shaped object), the dimension of the internal space of the pyrolysis furnace 3 in the panel thickness direction can be reduced, and the energy required to heat the internal space to a high temperature (for example, 600 degrees or higher) can be reduced. In addition, by arranging multiple nozzles 38, 39 that spray superheated steam so as to face the main surfaces (upper and lower surfaces) of the panel 2, temperature variations during heating of the panel 2 can be reduced, and the panel decomposition treatment time can be shortened. In addition, because the pyrolysis device 1 uses superheated steam, the panel 2 having a plastic material layer can be heated in an atmosphere containing almost no oxygen, and fires and the like in the pyrolysis furnace 3 can be prevented, allowing safe treatment.

[0040] In addition, in the pyrolysis furnace 3, if it is desired to improve the airtightness of the furnace body 31, for example, in consideration of improving the energy efficiency of the pyrolysis furnace 3 or suppressing the inflow of air into the furnace body 31, openable and closable door sections may be provided at the panel inlet (upstream side of the transport) and the panel outlet (downstream side of the transport) in the furnace body 31.

[0041] 4(A), the introduction preparation chamber 12 and the exhaust preparation chamber 13 may be connected to the panel inlet and panel outlet of the furnace body 31. In this case, the introduction preparation chamber 12 and the exhaust preparation chamber 13 are connected to gas supply pipes for supplying, for example, nitrogen gas (inert gas) or low-temperature steam at 200°C or less, and filled with nitrogen gas or low-temperature steam, thereby suppressing the inflow of oxygen (air) into the furnace body 31.

[0042] 4(B), the introduction preparation chamber 12 and the discharge preparation chamber 13 may be connected to the furnace body 31, the transport section 34 may be divided into an introduction side transport section 34A, an in-furnace transport section 34B, and a discharge side transport section 34C, and openable and closable doors may be provided at the upstream end of the introduction preparation chamber 12 in the transport direction and the downstream end of the discharge preparation chamber 13 in the transport direction. In this case, the preparation chambers 12 and 13 may be filled with nitrogen gas or low-temperature steam, the door sections may be closed, and then the supply of nitrogen gas or low-temperature steam to the preparation chambers 12 and 13 may be stopped, thereby reducing the supply amount of nitrogen gas or low-temperature steam while suppressing the inflow of oxygen into the furnace body 31, thereby reducing the processing cost.

[0043] Also, the in-furnace transport section 34B may be provided separately for the introduction preparation chamber 12, the furnace body 31, and the discharge preparation chamber 13, and a door section may be provided for each of the panel inlet and the panel outlet of the furnace body 31. In this case, the panel 2 is introduced into the introduction preparation chamber 12 with the door section of the panel inlet of the furnace body 31 closed, the door section of the panel inlet of the introduction preparation chamber 12 is closed to fill the introduction preparation chamber 12 with nitrogen gas or low-temperature steam, and then the door section of the furnace body 31 is opened to introduce the panel 2 into the furnace body 31, thereby preventing the inflow of oxygen into the furnace body 31. Also, the panel 2 in the furnace body 31 is discharged to the discharge preparation chamber 13 by opening the door section of the panel outlet of the furnace body 31 with the door section of the panel outlet of the discharge preparation chamber 13 filled with nitrogen gas or low-temperature steam closed, and the door section of the furnace body 31 is closed and the door section of the discharge preparation chamber 13 is opened to discharge the panel 2, thereby preventing the inflow of oxygen into the furnace body 31.

[0044] Furthermore, exhaust pipes connected to a vacuum suction device may be connected to each of the introduction preparation chamber 12 and the exhaust preparation chamber 13. In this case, the preparation chambers 12 and 13 are first evacuated to create a low-oxygen state, and then filled with nitrogen gas or water vapor, thereby more reliably suppressing the inflow of oxygen into the furnace body 31.

[0045] 5, the gas cooling device 6 may have a plurality of sealed tank sections 61 connected in series. In this embodiment, three sealed tank sections 61 are provided, and the exhaust gas piping 8 is connected to an exhaust gas inlet pipe 62 provided in the first-stage sealed tank section 61 (the most upstream side in the gas flow direction). The gas outlet pipe 63 provided in the first-stage sealed tank section 61 is connected to an exhaust gas inlet pipe 62 provided in the second-stage sealed tank section 61 (the second in the gas flow direction) via a connecting pipe 14. The gas outlet pipe 63 provided in the second-stage sealed tank section 61 is connected to an exhaust gas inlet pipe 62 provided in the third-stage sealed tank section 61 (the most upstream side in the gas flow direction) via a connecting pipe 14. The third stage sealed tank portion 61 is connected to an exhaust gas introduction pipe 62 provided in the third stage sealed tank portion 61 (on the downstream side) via a connecting pipe 15. The exhaust pipe 9 is connected to a gas outlet pipe 63 of the third stage sealed tank portion 61.

[0046] In this embodiment, the exhaust gas discharged from the pyrolysis furnace 3 is more reliably cooled by the water 60 in the three sealed tank sections 61, so that the plastic material components contained in the exhaust gas can be precipitated in each sealed tank section 61 of the gas cooling device 6, and gases that have a high environmental impact, such as carbon dioxide and hydrocarbon gases, can be more reliably prevented from being discharged outside the gas cooling device 6.

[0047] In addition, by connecting multiple sealed tank sections 61 in parallel between the exhaust gas piping 8 and the exhaust pipe 9 and reducing the amount of exhaust gas introduced into each sealed tank section 61, the temperature rise of the water 60 in each sealed tank section 61 can be suppressed, thereby ensuring that the plastic material components contained in the exhaust gas are precipitated in each sealed tank section 61 of the gas cooling device 6.

[0048] In addition, in the above embodiment, the pyrolysis apparatus 1 is equipped with a continuous pyrolysis furnace 3 having a conveying section 34 that transports the panel 2 and passes it through the furnace body 31, but a batch-type pyrolysis furnace may also be used.

[0049] 6, for example, a batch-type pyrolysis furnace 3A has a plurality of rail members 40 spaced apart from one another in a substantially horizontal plane inside a furnace body 31, located between an upper nozzle 38 and a lower nozzle 39 in a side view. A tray member 41 on which a panel 2 is placed is inserted into the furnace body 31 via an openable / closable door portion 42 provided on the side of the furnace body 31, and the panel 2 can be placed on the rail members 40 via the tray member 41.

[0050] In addition, in the above embodiment, an upper nozzle 38 and a lower nozzle 39 are provided on either side of the panel 2 placed in the furnace body 31, but the arrangement of the nozzles for injecting superheated steam is not limited to this and can be changed as appropriate.

[0051] For example, as in the pyrolysis furnace 3B shown in Fig. 7, the lower steam pipe section 37 and the lower nozzle 39 may be removed from the configuration shown in Fig. 6 to reduce the height of the internal space of the furnace body 31 (the dimension of the internal space of the pyrolysis furnace 3 in the panel thickness direction). This reduces the energy required to heat the internal space of the furnace body 31 to a high temperature. Such a configuration can also be applied to the pyrolysis furnaces 3 shown in Figs. 2 and 4.

[0052] Also, an exhaust pipe connected to a vacuum suction device may be connected to the furnace body 31. In this case, the inside of the furnace body 31 is evacuated to create a low-oxygen state, and then superheated steam is supplied into the furnace body 31, whereby the panel 2 can be heated in an atmosphere with a low oxygen concentration.

[0053] Next, an example of a pyrolysis furnace will be described with reference to Figs. 8 and 9. Fig. 8 is a plan view that shows a schematic diagram of yet another example of a pyrolysis furnace. Fig. 9 is a side view that shows the same pyrolysis furnace. In Fig. 8, the furnace body 31 is shown in a cross section passing through the opening 31a. In Fig. 9, the furnace body 31 is shown in a vertical section passing through the gas outlet pipe 33.

[0054] The pyrolysis furnace 3C of this embodiment is configured such that an opening 31a through which a tray member 41 can be inserted and removed is provided on one side of a furnace body 31 that is substantially a rectangular parallelepiped box, and the opening 31a can be sealed with an openable and closable door portion 42. Note that in Figures 8 and 9 and the like, the furnace body 31 is shown in cross section and integrally, but the furnace body 31 may be configured by assembling a plurality of members.

[0055] The pyrolysis furnace 3C includes a main steam piping section (main piping section) 35 for introducing superheated steam into the furnace body 31 and an upper The furnace body 31 is provided with a superheated steam introduction pipe 32 having a steam piping section (branch piping section) 36. The upper steam piping section 36 is provided inside the furnace body 31. As shown in Fig. 8, the upper steam piping section 36 is provided in a zigzag shape folded back multiple times in a substantially horizontal plane. The lower end of the main steam piping section 35, which penetrates the upper surface of the furnace body 31 and extends in the vertical direction, is connected to the upper surface of the middle part of the upper steam piping section 36.

[0056] As shown in Fig. 8 and Fig. 9, the main steam pipe section 35 is provided in a portion (portion closer to the opening 31a) of the upper surface of the furnace body 31 closer to the door section 42. The upper steam pipe section 36 includes a bifurcated branch section 36a provided at a connection point with the main steam pipe section 35, a pair of inner portions 36b, 36b extending from the branch section 36a to the inner side of the furnace body 31 (the side opposite to the side where the opening 31a is provided), a pair of folded back portions 36c, 36c folded back toward the door section 42 side so as to bend in a direction away from each other from the inner portions 36b, 36b, and a pair of frontward portions 36d, 36d extending from the folded back portions 36c, 36c toward the vicinity of the door section 42. In this embodiment, the upper steam pipe section 36 is provided in a substantially M-shape in a plan view.

[0057] A plurality of upper nozzles 38 are provided on the lower surface of the upper steam pipe section 36, facing the panel 2 arranged in the furnace body 31. In this embodiment, four upper nozzles 38 are provided at intervals from each other on each of the rear-facing parts 36b, 36b and the front-facing part 36d of the upper steam pipe section 36. In this embodiment, these upper nozzles 38 are arranged along the length and width of a horizontal plane parallel to the panel 2 in the pyrolysis furnace 3 (for example, the direction in which the tray member 41 is inserted and removed, and a direction perpendicular to the inserting and removing direction in the horizontal plane). In this way, by providing a plurality of upper nozzles 38 at intervals from each other facing the panel 2 arranged in the furnace body 31, it is possible to reduce temperature variations in each area of ​​the panel 2, and shorten the panel decomposition processing time.

[0058] In the pyrolysis furnace 3C, the upper nozzles 38 are arranged in a lattice shape in a plan view, but the arrangement of the upper nozzles 38 is not limited to this, and may be arranged in a staggered shape or irregularly. In the pyrolysis furnace 3C, a lower steam piping section 37 and a plurality of lower nozzles 39 may be provided below the panel 2, similar to the pyrolysis furnace 3A shown in FIG. 6. In this case, the lower nozzles 39 are arranged at intervals from each other, facing the lower surface of the panel 2 arranged in the furnace body 31. The shape of the lower steam piping section 37 in which the upper nozzles 38 are provided and the arrangement of the lower nozzles 39 are the same as, for example, the upper steam piping section 36, but the shape and the arrangement of the nozzles may be different between the upper steam piping section 36 and the lower steam piping section 37.

[0059] 8 and 9, in the pyrolysis furnace 3C, the gas outlet pipe 33 provided on the upper surface of the furnace body 31 is provided near one of two corners on the inner side of the furnace body 31 in a plan view. This allows a gas flow to be formed in the furnace body 31 toward the corner where the gas outlet pipe 33 is provided, and gas retention in the furnace body 31 can be suppressed.

[0060] The pyrolysis furnace 3C is provided with a pair of in-furnace roller conveyors 43, 43 extending from the front side to the back side inside the furnace body 31. Each in-furnace roller conveyor 43 is provided with a plurality of in-furnace rollers 44 rotatably arranged around a roller axis extending in a direction perpendicular to the horizontal plane to the direction in which the tray member 41 is inserted and removed. The in-furnace roller conveyors 43, 43 are provided at intervals from each other in a direction perpendicular to the horizontal plane to the direction in which the tray member 41 is inserted and removed, and are provided to be able to support the tray member 41 inside the furnace body 31. By providing the in-furnace roller conveyors 43, 43, the tray member 41 carrying the panel 2 can be smoothly inserted and removed from the furnace body 31.

[0061] As shown in Figs. 10 and 11, when the tray members 41 and the panels 2 are put into and taken out of the pyrolysis furnace 3C, a tray moving cart 51 equipped with a roller conveyor can be used to easily carry out the put-in and take-out. This makes it easy to carry out the work. The tray moving cart 51 is composed of two carts 52, 52 of the same structure. Each cart 52 is equipped with a roller conveyor 53 having a plurality of rollers 54 at a position roughly the same height as the in-furnace roller conveyor 43 of the pyrolysis furnace 3C. A plurality of wheels 55 are attached to the bottom of the cart 52, and the cart 52 is configured to be movable by the rolling of the wheels 55. The two carts 52, 52 are configured to be connectable and separable in the direction in which the roller conveyor 53 can transport goods.

[0062] The tray member 41 is placed on the roller conveyor 53 of the tray moving cart 51, which is made by connecting two carts 52, and the tray moving cart 51 is disposed near the door portion 42 of the pyrolysis furnace 3C, so that the tray member 41 carrying the panel 2 can be easily taken in and out of the furnace body 31 by utilizing the rolling of the rollers 44, 54 of the roller conveyor 53 and the roller conveyor 43 inside the furnace. In addition, the tray moving cart 51 is provided with wheels 55, so that the tray moving cart 51 can be easily moved and can be easily moved between the installation position of the tray moving cart 51 (see Figs. 10 and 11) and the storage space. In addition, the tray moving cart 51 is composed of two separable carts 52, 52, so that the carts 52, 52 can be separated and stored at positions away from each other, and the empty space around the installation site of the pyrolysis device can be effectively used as a storage space for the cart 52. The tray moving cart 51 is not limited to a configuration separable into two carts 52, 52, but may be composed of one cart or three or more carts.

[0063] Moreover, one side of the tray member 41 is provided with a handle portion 41a that can be held by an operator, and the operator can hold the handle portion 41a to easily slide the tray member 41 on the in-furnace roller conveyor 43 and the roller conveyor 53. The structure of the portion of the tray member 41 on which the panel 2 is placed is not particularly limited, and may be, for example, a plate-like shape or a mesh-like shape.

[0064] Next, an example of a gas cooling device will be described with reference to Fig. 12. Fig. 12 is a diagram showing a schematic diagram of still another example of a gas cooling device, where (A) is a plan view and (B) is a side view.

[0065] The gas cooling device 6A of this embodiment includes a sealed tank portion 61, an exhaust gas introduction pipe 62, and a gas discharge pipe 63. The sealed tank portion 61 includes a tank main body portion 61a having a generally rectangular box shape with an open top, and a tank lid portion 61b that seals the top opening of the tank main body portion 61a. The tank lid portion 61b is detachably attached to the top of the tank main body portion 61a with bolts or the like.

[0066] An upper communication hole 61c and a lower communication hole 61d are provided on one side of the tank main body 61a, which communicate the inside of the tank main body 61a with the outside. The upper communication hole 61c is provided at a position slightly above the center position of the height of the one side of the tank main body 61a. The lower communication hole 61d is provided at the lower part of the one side of the tank main body 61a. For example, water can be stored in the tank main body 61a by injecting water into the tank main body 61a from the upper communication hole 61c while prohibiting the discharge of liquid from the lower communication hole 61d.

[0067] The tank lid 61b has two corners far from the communication holes 61c and 61d in a plan view, and an exhaust gas inlet pipe 62 is inserted vertically near one of the two corners, and a gas outlet pipe 63 is inserted vertically near the other corner. The upper parts of the exhaust gas inlet pipe 62 and the gas outlet pipe 63 are provided so as to protrude upward from the upper surface of the tank lid 61b. The lower end of the exhaust gas inlet pipe 62 is disposed near the lower part of the tank main body 61a so as to be immersed in the water contained in the sealed tank 61. The lower end of the gas outlet pipe 63 is disposed at the upper part of the sealed tank 61 so as not to be immersed in the water contained in the sealed tank 61. Note that a gap between the pipes 62 and 63 and an opening provided in the tank lid 61b for inserting the pipes 62 and 63 is is sealed, for example by a welding process.

[0068] Furthermore, on the upper surface of tank lid 61b, a space capable of installing exhaust fan 10 and filter 11 (not shown in (B)) is provided between communication holes 61c, 61d and pipes 62, 63 in a plan view. By installing exhaust fan 10 on tank lid 61b, exhaust pipe 9 (see Figures 1, 3, etc.) connecting gas outlet pipe 63 and exhaust fan 10 can be shortened, and the entire pyrolysis apparatus can be made compact.

[0069] Next, other examples of pyrolysis furnaces will be described with reference to Figs. 13 to 16. Fig. 13 is a plan view that shows a schematic diagram of yet another example of a pyrolysis furnace. Fig. 14 is a side view that shows the same pyrolysis furnace. Fig. 15 is a cross-sectional view taken along the line AA in Fig. 13. Fig. 16 is a cross-sectional view showing the state in which the opening of the pyrolysis furnace is opened. In Figs. 13 and 16, the furnace body 301 of the pyrolysis furnace 300 is shown in a cross section passing through the opening 301a. In Fig. 14, the furnace body 301 is shown in a central vertical section passing through the opening 301a.

[0070] <Overall composition> The pyrolysis furnace 300 of this embodiment has an opening 301a (see Figure 16) through which the tray member 41 can be inserted and removed, on one side of a furnace body 301 that is approximately a rectangular parallelepiped box and supported by a support stand 309, and is configured so that the opening 301a can be closed by an openable and closable door portion 342.

[0071] <Internal structure> The furnace body 301 includes a box-shaped outer wall member 302 having an opening at the opening portion 301a, and a box-shaped inner wall member 303 disposed within the outer wall member 302. The inner wall member 303 has an opening at the opening portion 301a. The outer wall member 302 and the inner wall member 303 are formed of steel plates. The panel 2 placed on the tray member 41 is accommodated together with the tray member 41 inside the inner wall member 303.

[0072] Formed between the exterior wall member 302 and the interior wall member 303 are a heat insulating sheet layer 311, a heat storage material layer 312, a heat insulating material layer 313, and an ordinary brick layer 314. The exterior wall bottom surface portion 302a, the exterior wall back surface portion 302b, and the left and right exterior wall side surface portions 302c of the exterior wall member 302 are lined with red bricks to form the ordinary brick layer 314. The ordinary brick layer 314 functions as a heat insulating material.

[0073] A heat storage material layer 312 formed by arranging heat storage bricks (fireproof bricks) is formed inside the normal brick layer 314 so as to surround the upper, lower, left and right surface portions (the inner wall bottom surface portion 303a, the left and right inner wall side surface portions 303c, and the inner wall top surface portion 303d) of the inner wall member 303. Between the left and right inner wall side surface portions 303c of the inner wall member 303 and the heat storage material layer 312, a heat insulating sheet layer 311 made of a flexible sheet-like heat insulating material such as insulating felt is formed.

[0074] A heat insulating layer 313 made of heat insulating bricks (heat insulating firebricks) arranged so as to surround the periphery of the heat storage material layer 312 is formed inside the ordinary brick layer 314. The heat insulating layer 313 also covers the inner wall back surface portion 303b of the inner wall member 303.

[0075] An insulating sheet layer 311 is formed between the ordinary brick layer 314 lining the exterior wall back surface portion 302b and the insulating material layer 313. An insulating sheet layer 311 is also formed between the exterior wall upper surface portion 302d and the insulating material layer 313. As shown in Figures 13 to 16, the insulating sheet layer 311 is provided between the inner wall back surface portion 303b and the exterior wall back surface portion 302b, between the inner wall side surface portion 303c and the exterior wall side surface portion 302c, and between the inner wall upper surface portion 303d and the exterior wall upper surface portion 302d.

[0076] As shown in FIGS. 13 to 15, the opening of the inner wall member 303 is larger than the opening of the outer wall member 302. The heat insulating layer 313 also includes a portion formed by arranging heat insulating bricks in a U-shape with an upward opening in the opening of the outer wall member 302 so as not to block the opening of the inner wall member 303.

[0077] A lid heat storage material layer 322 made of a plurality of removably installed heat storage bricks is formed in a position near the opening inside the inner wall member 303. The opening of the inner wall member 303 is closed by a removable inner lid member 304. The inner lid member 304 is formed of a steel plate. The inner lid member 304 may be provided with a handle (not shown) that can be held by an operator.

[0078] A lid insulation layer 323 made of a plurality of insulating bricks is formed on the outside of the inner lid member 304 so as to fill the inside of the upwardly opening U-shaped insulation layer 313. In this way, the opening of the outer wall member 302 is blocked by the ordinary brick layer 314 formed in the upwardly opening U-shape, the insulation layer 313 made of insulating bricks, and the lid insulation layer 323.

[0079] The door section 342 closing the opening 301a (opening of the outer wall member 302) of the furnace body 301 is formed of a steel plate. One of the left and right edges of the door section 342 is rotatably connected to the opening side end (front end) of one of the left and right outer wall side sections 302c of the outer wall member 302 via a hinge 343.

[0080] A lid insulation sheet layer 321 is attached to the door portion 342. When the door portion 342 is closed, the lid insulation sheet layer 321 faces the ordinary brick layer 314, the insulation material layer 313, and the lid insulation material layer 323 which close the opening of the exterior wall member 302, and closes the opening of the exterior wall member 302.

[0081] As shown in Figure 16, when the panel 2 and the tray member 41 are inserted or removed into the inner wall member 303 of the furnace body 301, the door portion 342 holding the lid insulation sheet layer 321 is opened, and the lid insulation material layer 323, the inner lid member 304, and the lid heat storage material layer 322 are removed to expose the opening of the inner wall member 303.

[0082] When performing the disassembly process of the panel 2, first, the panel 2 and the tray member 41 are placed in the inner wall member 303. Next, the lid heat storage material layer 322 is placed so as to close the opening of the inner wall member 303, and then the inner lid member 304 is placed to close the opening of the inner wall member 303. Furthermore, the lid insulation material layer 323 is placed on the front side of the inner lid member 304, and then the door part 342 is closed to close the opening 301a of the furnace body 301 (the opening of the outer wall member 302) with the lid insulation sheet layer 321 and the door part 342. Then, the door part 342 is fixed to the outer wall member 302 with a fixing device (not shown).

[0083] 13 to 15, in the furnace body 301, the upper surface, lower surface and left and right side surfaces of the inner wall member 303 are surrounded by a heat storage material layer 312, and the opening of the inner wall member 303 is blocked by a lid heat storage material layer 322. As a result, when superheated steam is introduced into the inner wall member 303 from a superheated steam inlet portion 350 (described later) to raise the temperature inside the inner wall member 303, heat can be stored in the heat storage material layer 312 and the lid heat storage material layer 322. Therefore, when the thermal decomposition process of the panel 2 is repeated by opening and closing the door portion 342, the time until the temperature inside the inner wall member 303 reaches a desired temperature can be shortened, and the process efficiency is improved.

[0084] 17 and 18, a heat storage material layer 312 may be provided between the outer wall back surface portion 302b and the inner wall back surface portion 303b. This can further enhance the heat storage effect of the furnace body 301.

[0085] As shown in FIGS. 13 to 15, the upper surface, rear surface, and left and right side surfaces of the inner wall member 303 are surrounded by a heat insulating material layer 313, and a lid heat insulating material layer 323 is disposed in front of the opening of the inner wall member 303. This makes it possible to prevent heat inside the furnace body 301 (heat inside the inner wall member 303) from being released to the outside during the thermal decomposition treatment of the panel 2, thereby improving the treatment efficiency.

[0086] 19, the heat insulating layer 313 may not be disposed below the inner wall member 303. This can reduce the manufacturing cost of the furnace body 301 and can reduce the height dimension of the furnace body 301.

[0087] 13 to 15, the heat insulating sheet layer 311 made of a flexible sheet-like heat insulating material is provided between the inner wall back surface portion 303b and the outer wall back surface portion 302b, between the inner wall side surface portion 303c and the outer wall side surface portion 302c, between the inner wall upper surface portion 303d and the outer wall upper surface portion 302d, and between the inner cover member 304 and the door portion 342. This allows the heat insulating sheet layer 311 to absorb the thermal expansion of the steel plate inner wall member 303, thereby preventing damage to the heat storage material layer 312 and the heat insulating material layer 313 (bricks in this embodiment) caused by the thermal expansion of the inner wall member 303.

[0088] The position where the heat insulating sheet layer 311 is arranged is not limited to the above embodiment, and as long as it is arranged between the outer wall member 302 and the inner wall member 303 so as to surround the back surface, left and right side surfaces, and top surface of the inner wall member 303, it can absorb the thermal expansion of the inner wall member 303. For example, as shown in Figures 20 and 21, the heat insulating sheet layer 311 may be provided adjacent to the inner wall back surface portion 303b, the left and right inner wall side surface portions 303c, and the inner wall top surface portion 303d of the inner wall member 303.

[0089] In addition, since a plurality of bricks are placed on the inner wall member 303, a reinforcing member for suppressing deflection of the inner wall upper surface portion 303d may be provided. This reinforcing member can be formed, for example, by fixing a steel plate rib extending along the diagonal line of the inner wall upper surface portion 303d to the upper surface of the inner wall upper surface portion 303d. In this case, a steel plate facing the inner wall upper surface portion 303d is placed on the reinforcing member, and a brick is placed on the steel plate, making it easy to arrange the brick above the inner wall member 303. In such a configuration, it is preferable to fill the gap between the inner wall upper surface portion 303d and the steel plate thereon with a heat insulating material such as heat insulating felt, to reduce the space through which gas flows between the outer wall member 302 and the inner wall member 303.

[0090] 13 to 15, the space in which the panel 2 to be disassembled is installed is surrounded by a steel plate inner wall member 303 and an inner lid member 304. This makes it possible to prevent or suppress the gas and superheated steam in the inner wall member 303 from coming into contact with the insulating sheet layer 311, the heat storage material layer 312, the insulating material layer 313, and the ordinary brick layer 314, thereby reducing deterioration of the bricks and flexible insulating material.

[0091] 22, the inner wall upper surface portion 303d of the outer wall member 302 may be provided so as to be openable and closable. This allows the internal structure of the furnace body 301 to be assembled and disassembled with the inner wall upper surface portion 303d removed, improving the ease of assembly and maintenance of the furnace body 301.

[0092] In the furnace body 301, the heat insulating sheet layer 311 may be of any type as long as it is a flexible sheet-like heat insulating material. The heat storage material layer 312 is not limited to being made of heat storage bricks arranged in a row, but may be made of any material with high heat storage properties. The heat insulating material layer 313 is not limited to being made of heat insulating bricks arranged in a row, but may be made of any material with high heat insulating properties. The heat insulating material layer 313 may be arranged in place of the ordinary brick layer 314, or the ordinary brick layer 314 may be removed.

[0093] <Piping configuration> Next, a piping configuration of the furnace body 301 will be described. As shown in Fig. 13 to Fig. 15, the pyrolysis furnace 300 includes a superheated steam inlet section 350 for introducing superheated steam into the inner wall member 303 of the furnace body 301, and a gas outlet section 352 for discharging the gas in the inner wall member 303 to the outside of the furnace body 301. 390 (see FIG. 15).

[0094] The gas outlet section 390 is provided from a front portion of the left-right center of the inner wall upper surface section 303d of the inner wall member 303 to vertically penetrate the inner wall upper surface section 303d and the outer wall upper surface section 302d. The gas outlet section 390 includes a gas outlet pipe 391 provided to penetrate the inner wall upper surface section 303d and the outer wall upper surface section 302d, a tee joint 392 screwed and connected to the upper end of the gas outlet pipe 391, a tubular connecting member 393 screwed and connected to the tee joint 392, and an outlet pipe flange 394 screwed and connected to the connecting member 393. A hot air supply pipe 395 is connected to one of the sockets of the tee joint 392.

[0095] The exhaust pipe flange 394 is connected to an exhaust pipe flange 8a provided at one end of an exhaust gas pipe 8 connected to the gas cooler 6. The gas exhaust pipe 391 is a metal round pipe. The tee joint 392, the connecting member 393, the exhaust pipe flange 394, and the hot air supply pipe 395 are all made of metal.

[0096] The superheated steam introduction section 350 includes a main piping section 360 extending through the outer wall back section 302b and the inner wall back section 303b of the furnace body 301, and a branch piping section 370 branching off from the main piping section 360 inside the inner wall member 303.

[0097] The main piping section 360 includes a main piping 361 consisting of a metal round pipe extending in the front-to-rear direction and penetrating the upper part of the center of the left and right sides of the outer wall back portion 302b and the inner wall back portion 303b, a metal main piping flange 362 screwed and connected to the end of the main piping 361 on the outside of the furnace, and a metal cross joint 363 screwed and connected to the end of the main piping 361 on the inside of the furnace.

[0098] A main pipe insertion hole 306 for inserting a main pipe 361 is provided in the rear part of the furnace body 301, penetrating the outer wall rear part 302b, the ordinary brick layer 314, the heat insulating sheet layer 311, the heat insulating material layer 313, and the inner wall rear part 303b. A main pipe flange 362 connected to the end of the main pipe 361 on the outer side of the furnace is connected to a steam pipe flange 7a provided at the end of a superheated steam pipe 7 to which superheated steam generated in the superheated steam generator 5 is supplied.

[0099] The branch pipe section 370 disposed inside the inner wall member 303 includes a central branch pipe section 371 and left and right side branch pipe sections 375. The central branch pipe section 371 includes a central branch pipe 372 having one end section screwed and connected to the cross joint 363 and extending in the front-rear direction, and a blocking member 373 such as a cap screwed and connected to the front end section (the end section opposite the cross joint 363) of the central branch pipe 372.

[0100] The horizontal branch pipe section 375 is formed in an L-shape in a plan view, and includes a horizontal connecting pipe 376 that is screwed and connected to the cross joint 363 and extends outward to the left and right, an elbow joint 377 that is screwed and connected to the left and right outer ends of the horizontal connecting pipe 376, a horizontal branch pipe 378 that is screwed and connected to the elbow joint 377 and extends in the front-rear direction, and a blocking member 373 that is screwed and connected to the front end of the horizontal branch pipe 378 (the end opposite to the elbow joint 377). The central branch pipe 372, the horizontal connecting pipe 376, and the left and right horizontal branch pipes 378 are formed of metal round pipes. The blocking member 373 and the elbow joint 377 are made of metal.

[0101] The central branch pipe 372, the horizontal connecting pipe 376, and the left and right side branch pipes 378 are disposed at upper positions in the internal space of the inner wall member 303. The central branch pipe 372 and the left and right side branch pipes 378 each include a plurality of ejection units 380 for ejecting superheated steam. In this embodiment, the ejection units 380 are formed of through holes formed in the central branch pipe 372 and the side branch pipe 378, and are configured to eject superheated steam downward. However, the ejection units 380 are not limited to nozzles. may be also possible.

[0102] The central branch pipe 372 is disposed below the lower end of the gas outlet pipe 391. The central branch pipe 372 is provided with an exhaust port-directed jet unit 381 for jetting superheated steam upward toward the gas exhaust port 305 defined by the lower end of the gas outlet pipe 391. In this embodiment, the exhaust port-directed jet unit 381 is formed as a through hole formed in the central branch pipe 372. However, the exhaust port-directed jet unit 381 may be a nozzle.

[0103] By injecting superheated steam into the gas exhaust port 305 inside the furnace body 301, the gas exhausted from within the furnace body 301 can be heated within the furnace body 301 (inside the inner wall member 303) immediately before being sucked into the gas exhaust port 305, and the components contained in the gas exhausted from within the furnace body 301 can be thermally decomposed. Note that, as long as the configuration allows superheated steam to be injected from the exhaust port-directed jet part 381 of the branch piping part 370 toward the gas exhaust port 305, the configurations of the piping path of the branch piping part 370, the position and direction of the exhaust port-directed jet part 381, the position of the gas exhaust port 305, and the like are not particularly limited.

[0104] 15, high-temperature air of, for example, about 500 to 800 degrees is mixed into the gas flowing through gas outlet portion 390 from inside inner wall member 303 toward exhaust gas piping 8 from hot air supply pipe 395 connected to tee joint 392. This makes it possible to decompose components contained in the gas exhausted from inner wall member 303, and to reduce the burnt odor of the gas exhausted from exhaust pipe 9.

[0105] The furnace body 301 may be configured such that the hot air supply pipe 395 is not connected to the gas outlet part 390. In this case, a plug or other blocking member is attached to the socket of the tee joint 392 instead of the hot air supply pipe 395. Also, an elbow joint can be used instead of the tee joint 392.

[0106] In addition, in the superheated steam introduction section 350, a main pipe flange 362 is screwed and connected to the end portion outside the furnace of a main pipe 361 penetrating the wall portion (back portion in this embodiment) of the furnace body 301. In this configuration, after assembling the main pipe portion 360 and the branch pipe portion 370 of the superheated steam introduction section 350 excluding the main pipe flange 362, the main pipe 361 is inserted from inside the furnace body 301 into a main pipe insertion hole 306 provided in the wall portion of the furnace body 301 to be exposed to the outside of the furnace body 301, so that the assembled branch pipe portion 370 can be disposed inside the furnace body 301. Then, the main pipe flange 362 is screwed and connected to the end portion of the main pipe 361 exposed to the outside of the furnace body 301, so that the branch pipe portion 370 can be connected to the steam pipe flange 7a.

[0107] In this way, by configuring the main pipe flange 362 to be screwed and connected to the end of the main pipe 361 of the superheated steam introduction part 350 on the outer side of the furnace, the assembly of the superheated steam introduction part 350 to the furnace body 301 is facilitated, and the superheated steam introduction part 350 can be easily removed from the furnace body 301, improving maintainability. In addition, since an operator can perform the installation and removal of the superheated steam introduction part 350 to the furnace body 301 without getting inside the furnace body 301, the burden on the operator is reduced. Furthermore, the hole diameter of the main pipe insertion hole 306 provided in the wall of the furnace body 301 for inserting the main pipe 361 of the superheated steam introduction part 350 can be kept to a size that allows the main pipe 361 to be inserted (for example, a size slightly larger than the outer diameter of the main pipe 361 and smaller than the outer diameter of the main pipe flange 362), heat inside the furnace body 301 can be suppressed from being dissipated through the main pipe insertion hole 306.

[0108] The main pipe insertion hole 306 may be formed in any of the walls (top, side, bottom, or back) of the furnace body 301. In this embodiment, the superheated steam inlet 350 and the gas outlet 390 are constructed by connecting straight metal pipes to which connecting members such as joints and flanges are screwed, but the connecting members may be fixed to the straight pipes by welding, or a bent pipe may be used. However, as described above, the main pipe of the superheated steam inlet 350 The piping 361 and the main piping flange 362 are preferably connected by a threaded connection.

[0109] <Panel support stand> 14 and 15, a panel 2 to be treated is placed on a panel support stand 400 provided on a tray member 41 and housed inside the furnace body 301 (inside the inner wall member 303). The panel support stand 400 includes a panel mounting portion 401 on which the panel 2 is placed, and a plurality of legs 402 that support the panel mounting portion 401.

[0110] The tray member 41 has side walls that rise from the peripheral portion of the rectangular plate-shaped bottom. The panel mounting portion 401 has a number of openings on the surface on which the panel 2 is placed, and is formed of, for example, a net or a perforated plate. The legs 402 are provided so as to hang down from the peripheral portion of the panel mounting portion 401, and their lower ends are placed on the tray member 41.

[0111] By providing a large number of openings in the panel mounting portion 401, high-temperature superheated steam can easily come into contact with the underside of the panel 2, enabling the panel 2 to be heated evenly, thereby reducing temperature variations between regions of the panel 2 and shortening the panel disassembly processing time.

[0112] After the decomposition process, the panel residue of the panel 2 remains on the panel mounting portion 401, or drops from an opening of the panel mounting portion 401 and is stored on the tray member 41. In this embodiment, the tray member 41 and the panel support base 400 are provided so as to be separable. As a result, after the decomposition process of the panel 2, the panel residue is removed from the furnace body 301 together with the tray member 41 and the panel support base 400, and then the tray member 41 and the panel support base 400 are separated, whereby the panel residue can be easily collected.

[0113] 23, a panel support stand 400 may include multiple panel mounting sections 401 spaced apart in the vertical direction. According to this embodiment, by mounting a panel 2 on each of the panel mounting sections 401, the number of panels 2 that can be treated in one pyrolysis treatment step can be increased, improving the treatment efficiency.

[0114] <Other examples of furnace bodies> Fig. 24 is a cross-sectional view for explaining another example of the furnace body. As shown in Fig. 24(A), the door part 342 has a frame-shaped insulating brick holding part 344 that holds the lid insulating material layer 323 on an inward surface 342a that faces the inner wall member 303 when closed. A lid insulating sheet layer 321 is attached to the inside and periphery of the insulating brick holding part 344 on the inward surface 342a of the door part 342. A plurality of insulating bricks are fixed inside the insulating brick holding part 344 to form the lid insulating material layer 323.

[0115] The inner lid member 304 also includes a frame-shaped heat storage brick holding portion 345 that holds the lid heat storage material layer 322. A plurality of heat storage bricks are fixed inside the heat storage brick holding portion 345 to form the lid heat storage material layer 322.

[0116] In this modification, since the lid insulation layer 323 is supported by the door portion 342, it is possible to remove and install the lid insulation layer 323 by opening and closing the door portion 342, improving convenience. Also, since the lid heat storage material layer 322 is supported by the inner lid member 304, it is possible to remove and install the inner lid member 304 and the lid heat storage material layer 322 together, improving convenience.

[0117] 24(B), an inner lid member 304 having a heat storage brick holding part 345 may be fixed to an insulating brick holding part 344 provided on a door part 342. This makes it possible to simultaneously remove and install the lid insulation layer 323, the inner lid member 304, and the heat storage brick holding part 345 by opening and closing the door part 342, further improving convenience.

[0118] In the above embodiment and modified examples, the lid insulation sheet layer 321, the lid heat storage material layer 322, the inner lid member 304, and the lid insulation material layer 323 are arranged in that order from the door portion 342 side, but the positions of the inner lid member 304 and the lid insulation material layer 323 may be swapped front to back so that the lid insulation material layer 323 is arranged on the outside of the inner lid member 304.

[0119] <Other examples of piping configuration> Next, another example of the piping configuration will be described with reference to Fig. 25 and Fig. 26. Fig. 25 is a schematic side view showing a modified example of the pyrolysis furnace, partly in cross section. Fig. 26 is a schematic front view showing the same pyrolysis furnace, partly in cross section.

[0120] In another example of this piping configuration, the left and right horizontal branch piping sections 375 of the branch piping section 370 are provided extending in the front-rear direction at a position lower than the panel mounting section 401 of the panel support base 400. One end (rear end) of the horizontal branch piping section 375 is connected to the cross joint 363 via a horizontal connecting pipe 376, a first elbow joint 377a, an upper and lower connecting pipes 376a, and a second elbow joint 377b. These pipes and connectors are connected, for example, by a screw connection.

[0121] The jetting section 380 of the horizontal branch pipe section 375 is configured to jet superheated steam inwardly to the left and right. This allows the superheated steam to be supplied toward the lower part of the panel 2, so that the superheated steam can be brought into even contact with the panel 2, and gas stagnation below the panel 2 can be prevented.

[0122] Moreover, the injection section 380 of the horizontal branch pipe 378 (the horizontal branch pipe section 375) is configured to inject superheated steam obliquely upward toward the lower surface of the panel 2. This allows the superheated steam to reliably come into contact with the lower surface of the panel 2.

[0123] The angle θ between the direction of the jetting portion 380 of the horizontal branch pipe 378 (direction in which superheated steam is jetted) and the vertical direction is 0 to 180 degrees, preferably 0 to 90 degrees, and more preferably 45 to 90 degrees. However, the direction of the jetting portion 380 of the horizontal branch pipe 378 is not limited to this, and may be, for example, facing outward to the left or right. Moreover, the direction of the jetting portion of the central branch pipe 372 is not limited to downward, and may be in any direction.

[0124] In the above-described embodiment (including the modified examples), the piping configuration of the superheated steam introduction section 350 may be any configuration capable of introducing superheated steam into the inside of the furnace body 301 (inside the inner wall member 303). For example, in the branch piping section 370, a plurality of central branch piping sections 371 may be provided, or a plurality of lateral branch piping sections 375 may be provided on each of the left and right sides.

[0125] <Cooling system> Next, cooling of the gas cooling device will be described. Fig. 27 is a block diagram showing a schematic cooling system of the gas cooling device. A cooling system 500 for cooling the gas cooling device 6 immerses the gas cooling device 6 in cooling water stored in a cooling tank 501, and cools the gas cooling device 6 with the cooling water while circulating the cooling water in the cooling tank 501 through a cooling water circulation path 502. The number of gas cooling devices 6 arranged in the cooling tank 501 is two in this cooling system 500, but it may be one, or three or more.

[0126] A cooling water pump 503 and a heat exchanger 504 are provided in the cooling water circulation path 502. The cooling water flowing through the cooling water circulation path 502 is cooled by heat exchange with a cooling medium flowing through a cooling medium circulation path 505 connected to the heat exchanger 504. The cooling medium is, for example, water, but is not particularly limited. A cooling medium tank 506 that stores and cools the cooling medium, and a cooling medium pump 507 that circulates the cooling medium are connected to the cooling medium circulation path 505.

[0127] The cooling system 500 can cool the sealed tank portion 61 and the water 60 therein by bringing cooling water into contact with the outer periphery of the sealed tank portion 61 of the gas cooling device 6, thereby preventing a deterioration in the gas cooling function of the gas cooling device 6 caused by the water 60 becoming hot.

[0128] 27, the cooling tank 501 is supplied with overflowing pure water from a pure water production machine 510 that supplies pure water to the superheated steam generator 5. Connected to the pure water production machine 510 are a raw water channel 511 that supplies raw water such as tap water, groundwater, and industrial water, a pure water supply channel 512 that supplies pure water to the superheated steam generator 5, a spare tank 513 that stores pure water, and a pure water discharge channel 514 that discharges the overflowing pure water.

[0129] The pure water discharged from the pure water discharge path 514 cools the gas aspirator 10A provided in the exhaust pipe 9, and is then supplied to the cooling tank 501. By cooling the gas aspirator 10A that exhausts the gas in the gas cooling device 6, it is possible to prevent a decrease in the suction function (blowing function) of the gas aspirator 10A even when the gas flowing in the exhaust pipe 9 is at a high temperature, while eliminating waste by using the overflow pure water.

[0130] Moreover, by supplying overflowing pure water from the pure water production machine 510 to the cooling tank 501 and using it as cooling water, the work of replenishing cooling water caused by evaporation can be eliminated or reduced.

[0131] When there is no need to cool the gas suction machine 10A or the exhaust fan 10 (see FIG. 1), the overflow pure water from the pure water production machine 510 may be directly supplied to the pure water production machine 510. When the cooling medium flowing through the cooling medium circulation path 505 is water, the overflow pure water may be supplied to the cooling medium tank 506. In this case, the work of replenishing the cooling medium tank 506 with water as the cooling medium can be eliminated or reduced.

[0132] <Other examples of cooling systems> Fig. 28 is a block diagram showing a schematic diagram of another example of the cooling system of the gas cooling device. In this cooling system 500A, a cooling water tank 508 for storing cooling water is provided in a cooling water circulation path 502. Since the cooling system 500A does not include the heat exchanger 504, the cooling medium circulation path 505, the cooling medium tank 506, and the cooling medium pump 507 shown in Fig. 28, the gas cooling device 6 can be cooled with a simple configuration.

[0133] In the cooling system 500A, overflow pure water discharged from the pure water production machine 510 through the pure water discharge channel 514 is supplied to the cooling water tank 508. This makes it possible to eliminate or reduce the work of replenishing cooling water caused by evaporation while eliminating waste by utilizing the overflow pure water. Note that the overflow pure water may be supplied to the cooling water tank 508 or the cooling tank 501 through the exhaust fan 10 (or the gas suction machine 10A), or may be supplied directly to the cooling tank 501 from the pure water discharge channel 514.

[0134] <Other examples of pyrolysis furnaces> Next, another example of the pyrolysis furnace will be described with reference to Fig. 29. Fig. 29 is a side view showing a schematic diagram of another example of the pyrolysis furnace. In Fig. 29, the furnace body 31A, the introduction preparation chamber 12A, and the discharge preparation chamber 13A are shown in vertical cross section.

[0135] The pyrolysis furnace 3 includes a furnace body 31A, an introduction preparation chamber 12A, and a discharge preparation chamber 13A, which are connected to the front and rear of the furnace body 31A. A superheated steam introduction pipe 32, a gas discharge pipe 33, and an in-furnace transfer section 34B are provided in each of the furnace body 31A, the introduction preparation chamber 12A, and the discharge preparation chamber 13A.

[0136] The superheated steam introduction pipe 32 includes a main steam pipe section 35, an upper steam pipe section 36, and an upper nozzle 38. The upper steam pipe section 36 in the furnace body 31A is provided with an exhaust port-directed injection section 381, which is, for example, a nozzle. The piping configuration of the superheated steam introduction pipe 32 and the gas discharge pipe 33 may be configured to introduce and discharge superheated steam into the furnace body 31A, the introduction preparation chamber 12A, or the exhaust preparation chamber 13A. For example, the main steam pipe section 35 may penetrate the side part of the housing, or may have the same configuration as the superheated steam introduction section 350 shown in Figures 13 to 16. The piping configurations of the superheated steam introduction pipe 32 and the gas discharge pipe 33 may be different from each other between the furnace body 31A, the introduction preparation chamber 12A, and the exhaust preparation chamber 13A.

[0137] The furnace body 31A has a front opening 31Aa formed in the front wall to which the introduction preparation chamber 12A is connected, and a rear opening 31Ab formed in the rear wall to which the discharge preparation chamber 13A is connected. The introduction preparation chamber 12A has a carry-in opening 12Aa on the front side surface facing the furnace body 31A. The discharge preparation chamber 13A has a discharge opening 13Aa on the rear side surface facing the furnace body 31A.

[0138] An introduction side conveying section 34A is disposed in front of the introduction preparation chamber 12A. An ejection side conveying section 34C is disposed in the rear of the introduction preparation chamber 12A. The introduction side conveying section 34A and the three divided in-furnace conveying sections 34B and ejection side conveying section 34C intermittently convey the panel 2 placed on the tray member 41 through the openings 12Aa, 31Aa, 31Ab, and 13Aa so as to stop it in the introduction preparation chamber 12A, the furnace body 31A, and the ejection preparation chamber 13A.

[0139] Each of the openings 12Aa, 31Aa, 31Ab, 13Aa is configured to be openable and closable by a door section 42A. The door section 42A that opens and closes the loading opening 12Aa is provided outside the introduction preparation chamber 12A. The door section 42A that opens and closes the front opening 31Aa is provided inside the introduction preparation chamber 12A. The door section 42A that opens and closes the rear opening 31Ab is provided inside the discharge preparation chamber 13A. The door section 42A that opens and closes the discharge opening 13Aa is provided outside the discharge preparation chamber 13A.

[0140] The door 42A is displaced by a door opening / closing mechanism (not shown) to open or close the opening 12Aa, 31Aa, 31Ab, or 13Aa. When the door 42A is closed, it is pressed against the periphery of the opening 12Aa, 31Aa, 31Ab, or 13Aa to enhance adhesion. When the door 42A is opened, the pressing force toward the opening 12Aa, 31Aa, 31Ab, or 13Aa is weakened, and then the door 42A is retracted, for example, upward so that the opening 12Aa, 31Aa, 31Ab, or 13Aa opens.

[0141] The inside of the furnace body 31, the introduction preparation chamber 12A, and the discharge preparation chamber 13A are filled with superheated steam supplied from the superheated steam introduction pipe 32, and are in a state containing almost no oxygen. The temperature inside the furnace body 31 is raised to a temperature at which the plastic resin contained in the panel 2 is vaporized, for example, 400 to 1200 degrees, preferably 600 degrees or more. The temperature inside the introduction preparation chamber 12A is a temperature at which the water vapor does not become liquid water and the plastic resin contained in the panel 2 is not vaporized, for example, a lower limit temperature of 100 degrees or more and an upper limit temperature of 250 degrees or less, preferably 200 degrees or less. The temperature inside the discharge preparation chamber 13A is a temperature at which the water vapor does not become liquid water, that is, 100 degrees or more.

[0142] The tray member 41 on which the panel 2 to be decomposed is placed is placed on the introduction side transport section 34A, which is upstream of the introduction preparation chamber 12A in the transport direction. In the decomposition process, first, the carry-in opening 12Aa is opened, and the introduction side transport section 34A and the in-furnace transport section 34B are driven to transport the panel 2 and tray member 41 into the introduction preparation chamber 12A. By temporarily opening the carry-in opening 12Aa, ambient air enters the introduction preparation chamber 12A, dissolving water vapor in the introduction preparation chamber 12A. On the other hand, since the front opening 31Aa of the furnace body 31A is closed by the door portion 42A, the amount and temperature of steam inside the furnace body 31A do not change.

[0143] Thereafter, the carry-in opening 12Aa is closed. The introduction preparation chamber 12A is filled with superheated steam supplied from the superheated steam introduction pipe 32, the air is discharged, and the temperature is raised to a level at which the plastic resin contained in the panel 2 does not vaporize.

[0144] Next, the front opening 31Aa of the furnace body 31A is opened, and the panel 2 and the tray member 41 are transferred into the furnace body 31A by driving the furnace body 31A and the in-furnace transport part 34B in the introduction preparation chamber 12A. At this time, the rear opening 31Ab of the furnace body 31A and the carry-in opening 12Aa of the introduction preparation chamber 12A are closed by the door part 42A. By temporarily opening the front opening 31Aa, the furnace body 31A and the introduction preparation chamber 12A communicate with each other, but since both the furnace body 31A and the introduction preparation chamber 12A are filled with superheated steam and have almost no oxygen, it is possible to prevent oxygen from flowing into these spaces. In addition, the superheated steam in the introduction preparation chamber 12A enters the furnace body 31A and the temperature in the furnace body 31A drops, but since the temperature in the introduction preparation chamber 12A is raised to a predetermined temperature (for example, about 200 degrees), the temperature drop in the furnace body 31A can be reduced.

[0145] Thereafter, the front opening 31Aa is closed. The inside of the furnace body 31A is heated to a temperature (e.g., 600°C or higher) at which the plastic resin contained in the panel 2 vaporizes by superheated steam supplied from the superheated steam introduction pipe 32. The panel 2 having a plastic material layer is heated, for example, to 600°C or higher in the superheated steam atmosphere, and the plastic resin sublimes or decomposes and vaporizes, and is discharged from the gas outlet pipe 33. If the panel 2 is a solar panel, the plastic material layers of the panel 2, such as the filler, adhesive, and back film, are vaporized and removed, and the panel 2 is separated into a cover glass, a solar cell, and a metal wiring member.

[0146] After the plastic material layer of the panel 2 is removed in the furnace body 31A, the rear opening 31Ab of the furnace body 31A is opened, and the treated panel 2 (panel residue) and the tray member 41 are transferred into the discharge preparation chamber 13A by driving the in-furnace transport section 34B in the furnace body 31A and the discharge preparation chamber 13A. At this time, the front opening 31Aa of the furnace body 31A and the discharge opening 13Aa of the discharge preparation chamber 13A are closed. By temporarily opening the rear opening 31Ab, the furnace body 31A and the discharge preparation chamber 13A are connected, but since the inside of the furnace body 31A and the inside of the discharge preparation chamber 13A are both filled with superheated steam and have almost no oxygen, the inflow of oxygen into these spaces can be prevented.

[0147] In addition, the superheated steam in the discharge preparation chamber 13A enters the furnace body 31A, causing the temperature in the furnace body 31A to drop, but since the temperature in the discharge preparation chamber 13A is raised to a predetermined temperature (e.g., 200°C or higher), the temperature drop in the furnace body 31A can be reduced. Here, by raising the temperature in the discharge preparation chamber 13A to a higher temperature (e.g., 300°C or higher) before the rear opening 31Ab is opened, the temperature drop in the furnace body 31A when the rear opening 31Ab is opened can be further reduced.

[0148] After the rear opening 31Ab is closed, the discharge opening 13Aa of the discharge preparation chamber 13A is opened, and the panel 2 (panel residue) and tray member 41 are removed from the discharge preparation chamber 13A by driving the in-furnace transport section 34B and the discharge side transport section 34C in the discharge preparation chamber 13A. At this time, since the rear opening 31Ab of the furnace body 31A is closed, a decrease in temperature and an inflow of air within the furnace body 31A are prevented. Note that, before opening the discharge opening 13Aa, a cooling time may be provided to decrease the temperature of the panel 2 and tray member 41 within the discharge preparation chamber 13A.

[0149] In this way, the pyrolysis furnace 3 of this embodiment can sequentially and continuously decompose the panels 2. In addition, the pyrolysis furnace 3 of this embodiment prevents oxygen from flowing into the furnace body 31A, which becomes hot. This allows panel 2 to be disassembled safely.

[0150] During the decomposition treatment of the panel 2 in the furnace main body 31A, the next panel 2 to be treated can be carried into the introduction preparation chamber 12A and the introduction preparation chamber 12A can be filled with superheated steam, thereby shortening the waiting time when moving to the treatment of the next panel 2. Furthermore, after the decomposition treatment of the panel 2 in the furnace main body 31A is completed with the introduction preparation chamber 12A and the discharge preparation chamber 13A filled with superheated steam, the front opening 31Aa and the rear opening 31Ab can be opened, and the treated panel 2 in the furnace main body 31A can be transferred into the discharge preparation chamber 13A while the untreated panel 2 in the introduction preparation chamber 12A can be transferred into the furnace main body 31A, thereby further shortening the treatment time.

[0151] Moreover, by filling the preparation chambers 12A, 13A with superheated steam and closing the doors, the supply of superheated steam to the preparation chambers 12, 13 is stopped, thereby reducing the supply amount of superheated steam and reducing the processing cost while suppressing the inflow of oxygen into the furnace body 31. The gas supplied to the preparation chambers 12A, 13A may be nitrogen gas.

[0152] The furnace body 31A and the preparation chambers 12A, 13A may have the same structure as the furnace body 301 described with reference to Figs. 13 to 22. That is, the furnace body 31A and the preparation chambers 12A, 13A may be provided with a metal inner wall member having a space for accommodating a panel, a metal outer wall member surrounding the inner wall member, and a heat insulating material layer surrounding the inner wall member between the inner wall member and the outer wall member, and a heat storage material layer provided between the inner wall member and the heat insulating material layer. Furthermore, in the furnace body 31A and the preparation chambers 12A, 13A, a heat insulating sheet layer made of a flexible sheet-like heat insulating material may be provided between the inner wall member and the outer wall member so as to surround the inner wall member.

[0153] Moreover, the superheated steam introduction section for introducing superheated steam into the furnace main body 31A and the preparation chambers 12A and 13A may have a structure similar to that of the superheated steam introduction section 350 described with reference to Fig. 13 to Fig. 22. That is, the superheated steam introduction section for introducing superheated steam into the furnace main body 31A and the preparation chambers 12A and 13A may include a main piping section provided penetrating the outer wall member and the inner wall member of the furnace main body, and a branch piping section branching from the main piping section inside the inner wall member, and the main piping section may include a main piping provided penetrating the outer wall member and the inner wall member, and a main piping flange screwed and connected to the end of the main piping on the outer side of the furnace.

[0154] The pyrolysis apparatus of the above embodiment comprises a pyrolysis apparatus mechanism including a pyrolysis furnace for decomposing a panel having a plastic material layer, and a superheated steam generator for generating superheated steam to be supplied to the pyrolysis furnace, the pyrolysis apparatus mechanism comprises a plurality of gas cooling devices for cooling and solidifying exhaust gas from the pyrolysis furnace, the exhaust gas containing components of the plastic material layer vaporized in the pyrolysis furnace, the pyrolysis furnace comprises a plurality of nozzles for spraying the superheated steam, the gas cooling device comprises a sealed tank section for storing water, an exhaust gas inlet pipe for directing the exhaust gas into the inside of the sealed tank section, and a gas outlet pipe for directing the exhaust gas to the outside of the sealed tank section, and inside the sealed tank section, an end of the exhaust gas inlet pipe is immersed in water while an end of the gas outlet pipe is not immersed in water, and a mesh member or a porous member is provided at the end of the exhaust gas inlet pipe.

[0155] According to the pyrolysis apparatus of the above embodiment, the panel is heated using superheated steam, so that the panel having the plastic material layer can be heated in a superheated steam atmosphere containing almost no oxygen, and fires and the like in the pyrolysis furnace can be prevented, allowing safe processing. Also, in the pyrolysis apparatus of the present invention, the panel having the plastic material layer is heated in the pyrolysis furnace with high-temperature superheated steam, so that the plastic material layer can be sublimated and vaporized, and the plastic material layer can be removed from the panel. Furthermore, gas containing the plastic material components sublimated in the pyrolysis furnace passes through water in a gas cooling device and solidifies, and the solid plastic material is precipitated in the gas cooling device, thereby reducing the amount of carbon dioxide. This prevents most of the gases that have a high environmental impact, such as hydrocarbon gases and the like, from being exhausted to the outside of the gas cooling device. In addition, since the object of treatment in the pyrolysis device of the present invention is a panel (a plate-shaped object), the dimensions of the internal space of the pyrolysis furnace in the panel thickness direction can be reduced, and the energy required to heat the internal space to a high temperature can be reduced. In addition, by arranging multiple nozzles that spray superheated steam so as to face the main surface of the panel, the temperature variation of the panel can be reduced, and the panel decomposition treatment time can be shortened.

[0156] In the pyrolysis device of the above embodiment, when the panel is, for example, a solar cell panel, the solar cell panel is heated with high-temperature superheated steam, whereby the filler covering the solar cell and the plastic material layers such as adhesive and back film are sublimated and vaporized, and the panel can be decomposed into metals such as cover glass, solar cell, copper wire, etc. This allows the used solar cell panel to be decomposed into solar cell containing recyclable raw materials such as silicon, and recyclable metal and glass, without emitting gases that have a high environmental impact.

[0157] In the pyrolysis apparatus of the above embodiment, the pyrolysis furnace may include a plurality of nozzles for injecting the superheated steam, and the plurality of nozzles may be arranged so as to sandwich the panel.

[0158] According to this embodiment, the panel can be efficiently heated from both sides, facilitating decomposition of the panel and shortening the processing time.

[0159] In addition, in the pyrolysis apparatus of the above embodiment, the pyrolysis furnace may be provided with a plurality of nozzles for injecting the superheated steam, and the plurality of nozzles may be arranged along both the vertical and horizontal sides of a horizontal plane parallel to the panel within the pyrolysis furnace and disposed opposite the panel.

[0160] Furthermore, in the pyrolysis apparatus of the above embodiment, the pyrolysis furnace is provided with a superheated steam inlet pipe for introducing superheated steam into the pyrolysis furnace, and the superheated steam inlet pipe has a main piping section that penetrates the pyrolysis furnace to introduce superheated steam from the outside, and a branch piping section that is connected to the main piping section within the pyrolysis furnace and is provided with the nozzle, and the branch piping section may be configured in a zigzag shape by being folded back multiple times on a horizontal plane parallel to the panel.

[0161] In the pyrolysis device of the above embodiment, the pyrolysis device mechanism may be configured to include a filter in an exhaust pipe of the gas cooling device.

[0162] According to this embodiment, harmful gases in the exhaust gas from the pyrolysis furnace are solidified in the gas cooler and then removed through a filter in the exhaust pipe, thereby reliably preventing the exhaust of harmful gases to the outside.

[0163] Although the target of decomposition processing by the pyrolysis apparatus of the present invention is a panel having a plastic material layer, it is also possible to use the pyrolysis apparatus of the present invention to decompose plastic materials such as PET bottles, and waste materials containing plastic materials.

[0164] Although the embodiment has been described above, the present invention is not limited to the above-described embodiment, but can be embodied in various forms. The configuration of each part is not limited to the illustrated embodiment, and various modifications are possible without departing from the spirit of the present invention. [Explanation of symbols]

[0165] 1 Pyrolysis equipment 2 Panel 3 Pyrolysis furnace 4 Pyrolysis equipment mechanism section 5. Superheated steam generator 6 Gas Cooling Device 300 Pyrolysis Furnace 301 Furnace body 302 Exterior wall materials 303 Inner wall material 305 Gas exhaust port 306 Main pipe insertion hole 311 Insulation sheet layer 312 Heat storage material layer 313 Insulation Layer 350 Superheated steam inlet 360 Main piping section 361 Main Pipe 362 Main pipe flange 370 Branch piping section 381 Exhaust port facing jet 390 Gas outlet section

Claims

[Claim 1] A pyrolysis device including a pyrolysis device mechanism including a pyrolysis furnace for decomposing a panel having a plastic material layer, and a superheated steam generator for generating superheated steam to be supplied to the pyrolysis furnace, The pyrolysis furnace includes a superheated steam inlet portion for introducing superheated steam into the furnace body, and a gas outlet portion for discharging gas in the furnace body to the outside of the furnace body, The superheated steam introduction section of the pyrolysis apparatus is provided with an injection section that injects superheated steam used for the thermal decomposition of the panel inside the furnace body, and an exhaust port-directed injection section that injects superheated steam toward the gas exhaust port of the gas outlet section.

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