Material recycling method and material recycling apparatus

Abstract

This invention provides a material recycling method that can regenerate various materials from heated raw materials, including synthetic resin materials and metal materials. [Solution] A thermal decomposition step in which the raw material to be heated, which is introduced into the thermal decomposition tank 12, A cooling process to cool the pyrolysis oil obtained by pyrolysis in a pyrolysis tank, A storage step involves storing the cooled pyrolysis oil in the pyrolysis oil tank 24, A condensation step in which volatile components obtained by thermal decomposition in the thermal decomposition tank 12 are condensed, It includes a discharge process for purifying and discharging condensed volatile components.

Description

Technical Field

[0001] The present invention relates to a material recycling method and a material recycling apparatus capable of recycling materials using waste as a heated raw material.

Background Art

[0002] The invention disclosed in Patent Document 1 below (paragraph 0010, etc.) discloses an invention related to a method for producing a coal-based material for liquefying coals.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The invention disclosed in Patent Document 1 liquefies coals and is not for recycling materials from waste including synthetic resin materials and metal materials.

[0005] An object of the present invention is to provide a material recycling method and a material recycling apparatus capable of recycling various materials from a heated raw material including a synthetic resin material and a metal material.

Means for Solving the Problems

[0006] The material recycling method according to the present invention includes a pyrolysis step of pyrolyzing the heated raw material introduced into a pyrolysis tank, a cooling step of cooling the pyrolysis oil obtained by the pyrolysis in the pyrolysis tank, a storage step of storing the cooled pyrolysis oil in a pyrolysis oil tank, a condensation step of condensing the volatile components obtained by the pyrolysis in the pyrolysis tank, and a discharge step of purifying and discharging the condensed volatile components. Furthermore, the material recycling apparatus according to the present invention is A pyrolysis tank for thermally decomposing the raw material to be heated, A cooler for cooling the pyrolysis oil obtained by pyrolysis in the pyrolysis tank, A pyrolysis oil tank for containing the cooled pyrolysis oil, The system includes a condenser for condensing volatile components obtained by thermal decomposition in the thermal decomposition tank, The condensed volatile components are purified by a purification section and then discharged. [Brief explanation of the drawing]

[0007] [Figure 1] This is an explanatory diagram illustrating the configuration of a material recycling apparatus according to the first embodiment of the present invention. [Figure 2] This is an explanatory diagram illustrating the configuration of a pyrolysis tank according to the first embodiment of the present invention. [Figure 3] This graph shows examples of thermal decomposition curves for various resins. [Figure 4] This is an explanatory diagram illustrating the configuration of a material recycling apparatus according to a second embodiment of the present invention. [Modes for carrying out the invention]

[0008] <Basic configuration of the material recycling apparatus 10 and material recycling method according to the first embodiment> The following describes material regeneration methods according to each embodiment of the present invention, and material regeneration apparatuses for performing said material regeneration methods. Figure 1 shows a material regeneration apparatus 10 according to the first embodiment. The material regeneration apparatus 10 is composed of a combination of multiple devices. The material regeneration apparatus 10 can also be understood as a material regeneration system.

[0009] The material recycling device 10 is capable of separating materials (material separation). When performing material separation, the material recycling device 10 can be understood as a material separation device that performs a specific material separation method.

[0010] The material regeneration apparatus 10 according to the first embodiment includes a pyrolysis tank 12, a pyrolysis receiving tank 14, a condenser 16, an absorption tower 18, a fuel gas receiving tank 19, a seal pot 20, and a chimney 22. The material regeneration apparatus 10 also includes a pyrolysis oil tank 24, a valve device 26, a circulating high-temperature pump 28, a three-way valve device (also called a valve device) 29, and a cooler 30. Of these, the pyrolysis tank 12 includes a receiving tray 32, a heating furnace 34, and a combustion burner 36.

[0011] The material regeneration method performed by the material regeneration apparatus 10 with this configuration comprises a pyrolysis step of introducing the raw material to be heated into a pyrolysis tank 12 and pyrolysis it; a cooling step of cooling the pyrolysis oil obtained by pyrolysis in the pyrolysis tank 12; a storage step of storing the cooled pyrolysis oil in a pyrolysis oil tank 24; a condensation step of condensing the volatile components obtained by pyrolysis in the pyrolysis tank 12; and a discharge step of purifying and discharging the condensed volatile components.

[0012] More specifically, first, in the pyrolysis process of the first embodiment, the sufficiently heated raw material to be heated (described later) is placed into the receiving tray 32 of the pyrolysis tank 12. As shown in Figure 2, the raw material to be heated (not shown) is placed into the receiving tray 32, which has been withdrawn from the pyrolysis tank 12, and the receiving tray 32 is placed back into the pyrolysis tank 12 as indicated by arrow B. A pyrolysis accelerator is also placed into the pyrolysis tank 12. In the pyrolysis tank 12, the receiving tray 32 is heated by a combustion burner 36 inside the heating furnace 34. The raw material to be heated is heated in the receiving tray 32.

[0013] Waste materials are used as the raw materials to be heated. Examples of waste materials include used tires, solar panels, circuit boards, silicone gaskets, air conditioning pipes, carbon fibers, reinforced glass fibers, and specific organic compositions (substances that combine multiple substances containing organic materials such as synthetic resins). At least one of these materials is put into the pyrolysis tank 12 after being washed (for example, by washing with water or steam).

[0014] Furthermore, in the case of waste tires, for example, the rubber and other components that make up the tire undergo thermal decomposition. Resin raw materials may be used in solar panels for sealants, sealing materials, backsheets, etc., and one or more of these may be thermally decomposed. Examples of wiring boards include phenolic resins, epoxy resins, polyimides, or polyesters, either alone or in combination with materials other than resins (such as metals forming wiring like copper or glass fibers), and the resin materials contained therein may be thermally decomposed. Examples of air conditioning pipes include materials where metal pipes are coated with resin-based heat insulating materials (such as polyethylene foam), and the resin-based heat insulating materials may be thermally decomposed. Carbon fibers and reinforced glass fibers may, for example, be combined with fibers and resins (such as epoxy resins, etc., also including precursors of such resins before curing), and these resins may be thermally decomposed. The specific-term composition is, for example, a composition formed by mixing organic substances and inorganic substances. Examples of the above-mentioned organic substances include resins (including precursors before curing) and oils. Examples of the above-mentioned resins include silicone resins (preferably thermosetting), epoxy resins, and urethane resins. The above-mentioned inorganic substances are preferably inorganic powders. Examples of the above-mentioned inorganic substances include carbon such as carbon fibers, metals (such as silver), metal oxides (such as alumina), metal nitrides, metal oxynitrides, and metal sulfides. Note that the metals mentioned here (including metals in metal oxides, etc.) may also be semi-metals (such as silicon, boron, etc.).

[0015] As the thermal decomposition accelerator, one suitable for the type of the heated raw material is used. For any of the above-mentioned waste tires, solar panels, wiring boards, silicon packings, air conditioning pipes, carbon fibers (carbon fiber-containing resins), and reinforced glass fibers (reinforced glass fiber-containing resins), as the thermal decomposition accelerator, PE (polyethylene) resin, PP (polypropylene) resin, and alkaline substances, etc. can be used. When adding PE resin and PP resin during the heating of the heated raw material, the PE resin and PP resin are used in combination.

[0016] The raw materials to be heated often include PE and PP. The PE and PP contained in the raw materials to be heated act as hydrogen-donating solvents. Therefore, the PE and PP contained in the raw materials to be heated are also used as pyrolysis accelerators. The insufficient pyrolysis accelerators are put into the pyrolysis tank 12 together with the raw materials to be heated (added to the raw materials to be heated).

[0017] Even when the raw material to be heated is a specific organic composition, PE, PP, etc. can be used as pyrolysis accelerators. Examples of the specific organic composition include compositions containing silicon (thermosetting), alumina, CF (carbon fiber), etc. Such specific organic compositions are also widely used in in-vehicle LIB (lithium-ion batteries), etc. Such specific organic compositions may be provided to users in the form of sheets or greases. The specific organic composition is supplied to the gap (including unevenness) between specific substances. The specific organic composition fills the gap between specific substances.

[0018] Slaked lime (calcium hydroxide) is also put into the pyrolysis tank 12 as an alkaline substance. The alkaline substance is used for neutralization when the raw material to be heated contains an acidic substance. Examples of the acidic substance include PVC (polyvinyl chloride) and nitrogen compounds. Slaked lime is used for neutralizing chlorine contained in the raw material to be heated. The addition of slaked lime can be carried out in the middle of the pipeline, but in order to prevent blockage of the pipeline, it is put into the pyrolysis tank 12 together with the raw material to be heated. As the alkaline substance, an inorganic base other than slaked lime may be used. For example, an alkaline earth metal hydroxide (such as magnesium hydroxide) or an alkali metal hydroxide may be used.

[0019] The pyrolysis conditions in the pyrolysis tank 12 satisfy, for example, the following content. Temperature: 350 - 550 °C Pressure: Atmospheric pressure Time: 1 - 3 hours Accelerator: The amount after mixing PE and PP (total input amount) is 20 - 100 wt% (more preferably 20 - 40 wt%) based on the weight of the raw material to be heated Slaked lime: The amount added is 1-3 wt% of the total amount of raw materials to be heated.

[0020] PE and PP are materials with a high hydrogen content. Therefore, in the material recycling device 10, as mentioned above, the PE and PP contained in the various raw materials to be heated function as thermal decomposition accelerators. It is thought that other materials besides PE and PP, as long as they have a high hydrogen content, can also function as thermal decomposition accelerators. The hydrogen content of various resins will be discussed later.

[0021] In the pyrolysis tank 12, the water in the raw material to be heated evaporates. When the raw material is heated further, the resin (waste plastic) in the raw material melts and liquefies. The melting of the waste plastic generates pyrolysis oil gas and other volatile components, and pyrolysis oil is obtained by cooling the pyrolysis oil gas (cooling process).

[0022] The pyrolysis fuel oil is transferred to the pyrolysis receiving tank 14, as indicated by arrow A, using, for example, transfer equipment (not shown), and stored (storage process). Volatile components generated by pyrolysis are condensed in the condenser 16. Unreacted acidic gases are absorbed by the absorption tower 18 (purification treatment), the fuel gas is stored in the fuel gas receiving tank 19, and the remaining gas is released into the outside air from the chimney 22, with backflow prevented by the seal pot 20 (safety device) (discharge process). Certain gases not absorbed by the absorption tower 18 (hydrogen, methane, ethane, propane gas, etc.) are used in the combustion burner 36 after passing through the fuel gas receiving tank 19.

[0023] A valve device 26, a circulating high-temperature pump 28, a three-way valve device 29, etc., are installed along the piping 40 (indicated by an arrow in Figure 1) connected to the pyrolysis receiving tank 14. The pyrolysis fuel oil in the pyrolysis receiving tank 14 is sent to the pyrolysis tank 12 and the pyrolysis oil tank 24 via the valve device 26, the circulating high-temperature pump 28, and the three-way valve device 29, etc. The pyrolysis fuel oil sent to the pyrolysis tank 12 is reused as a pyrolysis accelerator. The pyrolysis fuel oil transferred to the pyrolysis oil tank 24 is passed through a cooler 30. The pyrolysis fuel oil in the pyrolysis oil tank 24 is transferred to the combustion burner 36 via the circulating pump 42 and used in the combustion burner 36.

[0024] <Hydrogen content of various resins> Various resins (thermoplastic resins, thermosetting resins, etc.) contain hydrogen, as listed below. The higher the hydrogen content, the easier it is to convert to oil, and the better the quality of the resulting pyrolytic fuel oil. For thermoplastic resins, for example, the hydrogen content of PE (molecular weight 28 per unit) and PP (molecular weight 42 per unit) is 14.3 [wt%] in both the case of "per unit" and "carbon and hydrogen only". "Carbon and hydrogen only" refers to the hydrogen content among carbon and hydrogen only in "per unit".

[0025] The hydrogen content of PET (polyethylene terephthalate, molecular weight 192 per unit) is 4.2 wt% per unit and 6.3 wt% for carbon-hydrogen only. In the case of polymethyl methacrylate, the hydrogen content of acrylic resin (poly(meth)acrylic acid ester) is 8.0 [wt%] per unit (molecular weight 100) and 11.8 [wt%] for carbon-hydrogen only.

[0026] The hydrogen content of nylon 66 (molecular weight 226 per unit) is 9.74 [wt%] "per unit" and 13.3 [wt%] "carbon-hydrogen only". The hydrogen content of nylon 6 (molecular weight 113 per unit) is 9.82 [wt%] "per unit" and 13.4 [wt%] "carbon-hydrogen only".

[0027] The hydrogen content of PVC (polyvinyl chloride, molecular weight 62.5 per unit) is 4.8 wt% per unit and 11.1 wt% for carbon-hydrogen only.

[0028] For thermosetting resins, the hydrogen content of UPE (unsaturated polyester, molecular weight 158 ​​per unit in one example) is 8.9 [wt%] in both the case of "per unit" and "carbon-hydrogen only" in one example. The hydrogen content of PR (phenol resin, molecular weight 198 per unit in one example) is 5.1 wt% per unit and 6.0 wt% per unit (carbon and hydrogen only) in one example.

[0029] <Example of a thermal decomposition curve for resin> Figure 3 shows the thermal decomposition curves for PE, PP, PET, acrylic resin (PMMA (methacrylic resin)), ABS (acrylonitrile-butadiene-styrene resin), and PVC, among the various resins mentioned above. In addition to these resins, Figure 3 also shows the thermal decomposition curves for UF (urea resin), UR (polyurethane), PF (phenol resin), and PS (polystyrene).

[0030] According to Figure 3, for example, with PE, a weight decrease is observed from around 375°C, and the weight loss reaches 100% (0% weight) above 500°C. With PP, a weight decrease is observed from around 340°C, and the weight loss reaches 100% around 500°C.

[0031] Furthermore, for PVC, a two-stage weight reduction was observed, with the weight reduction temporarily stopping at approximately 60% (weight at approximately 40%) around 300-450°C. For PS, a weight reduction was observed from around 290°C, and the weight reduction reached 100% (weight at 0%) around 450°C.

[0032] <Material Recycling Device 10 and Advantages of the Material Recycling Device> According to the material regeneration apparatus 10 and material regeneration method of the first embodiment, the differences in melting points and hydrogen content of various resins are utilized. Then, the thermal decomposition characteristics illustrated in Figure 3 are utilized, and the resin to be regenerated contained in the raw material to be heated is selectively thermally decomposed. Then, unwanted volatile components evaporate at the target temperature, and the liquefied various resins are recovered and regenerated. For many raw materials to be heated, the residue remaining after thermal decomposition mainly consists of high-value metals, fillers, and carbon.

[0033] For example, if the heated raw material is waste tires, fuel oil, metal, and filler are recycled. In the case of solar panels, glass, metal, and fuel oil are recycled. In the case of circuit boards, copper, glass fiber, and fuel oil are recycled. In the case of silicone gaskets, filler, fuel oil, etc. are recycled. In the case of glass fiber reinforced plastic (GFRP), glass, filler, and fuel oil (including unsaturated polyester) are recycled. In the case of carbon fiber reinforced plastic (CFRP), rCF (recycled carbon fiber) and fuel oil (including epoxy) are recycled.

[0034] Furthermore, high-speed pyrolysis is performed in the pyrolysis tank 12, making it possible to separate the heated raw material in a short time. For example, conventionally, it took 15 hours to decompose a solar panel in the pyrolysis tank 12. However, with the material recycling apparatus 10 and material recycling method of the first embodiment, the time required for decomposition of a solar panel in the pyrolysis tank 12 has been reduced to 2 hours. Thus, the material recycling apparatus 10 and material recycling method, which are capable of high-speed pyrolysis, are suitable for small, regionally distributed recycling facilities. In addition, the material recycling apparatus 10 and material recycling method of the first embodiment contribute to CO2 reduction through the thermal circulation of PE and PP, as they reuse a portion of the pyrolysis fuel oil.

[0035] <Basic configuration of the material recycling apparatus 50 and material recycling method according to the second embodiment> Next, a material recycling apparatus 50 according to the second embodiment will be described. Note that the same configuration and decomposition conditions (thermal decomposition conditions) as in the first embodiment will be omitted from the explanation as appropriate.

[0036] Figure 4 shows a material regeneration apparatus 50 according to the second embodiment. The material regeneration apparatus 50 is a continuous type version of the material regeneration apparatus 10 according to the first embodiment and is equipped with two pyrolysis tanks 12A and 12B. Hereinafter, the pyrolysis tanks 12A and 12B will be referred to as the first pyrolysis tank 12A and the second pyrolysis tank 12B.

[0037] In Figure 4, the rotary kiln is indicated by the symbol 52. The rotary kiln 52 is located before the first pyrolysis tank 12A and the second pyrolysis tank 12B. The raw material to be heated is fed into the inlet 54 of the rotary kiln 52, as indicated by the arrow C.

[0038] Hot gas is introduced into the rotary kiln 52 as indicated by arrow N-1. In the second embodiment, the diameter of the hot gas flow path indicated by arrow N-1 is 600 mm (φ600), and the temperature is 550°C.

[0039] The arrows C, N-1, N-3, and N-4 in the diagram for the rotary kiln 52 indicate the direction of transport of the material to be heated. The material to be heated is transported continuously from the left side (upstream) to the right side (downstream) in the diagram.

[0040] Downstream of the rotary kiln 52 (the interrupted section downstream of arrow C), hot gas is introduced as indicated by arrow N-3. In the second embodiment, the diameter of the hot gas flow path related to arrow N-3 is 600 mm (φ600), and the temperature is 550°C.

[0041] Arrow N-4 in the figure indicates the flow of hot gas (Hot Gas Out) discharged on the upstream side of the rotary kiln 52 (in the example in Figure 4, downstream of the input point indicated by arrow C and upstream of arrow N-3). The diameter of the hot gas flow path related to arrow N-4 is 600 mm (φ600), and the temperature is 240°C.

[0042] The raw material heated in the rotary kiln 52 is discharged from the rotary kiln 52 downstream. The heated raw material discharged from the rotary kiln 52 is either a molten liquid (fluid molten material) or a solid such as metal (solid such as metal).

[0043] The heated raw material discharged from the rotary kiln 52 is transferred to either the first pyrolysis tank 12A or the second pyrolysis tank 12B via the open discharge rotary valve device 56. The transfer of the heated raw material from the rotary kiln 52 to either the first pyrolysis tank 12A or the second pyrolysis tank 12B is performed alternately by intermittently switching the opening and closing of valve devices 58 and 60.

[0044] The pyrolysis fuel oil obtained in the first pyrolysis tank 12A and the second pyrolysis tank 12B is alternately transferred to the pyrolysis receiving tank 14 by intermittently switching the opening and closing of valve devices 62 and 64 (arrow A).

[0045] The high-temperature gas generated in the first pyrolysis tank 12A and the second pyrolysis tank 12B is introduced into the rotary kiln 52 as the high-temperature gas (Hot Gas In) indicated by arrow N-3 as described above. In the example in Figure 4, a valve device 66 is provided in the flow path of the high-temperature gas (Hot Gas In) connecting the first pyrolysis tank 12A to the rotary kiln 52 (and from the second pyrolysis tank 12B to the rotary kiln 52). Combustion waste gas is transported through the flow path N-3 from the first pyrolysis tank 12A and the second pyrolysis tank 12B.

[0046] The pyrolysis fuel oil in the pyrolysis receiving tank 14 is sent to the first pyrolysis tank 12A, the second pyrolysis tank 12B, and the pyrolysis oil tank 24 via the valve device 26, the circulating high-temperature pump 28, and the three-way valve device 29, etc. The pyrolysis fuel oil in the pyrolysis oil tank 24 is sent by the pump 68 to the respective combustion burners 36 of the first pyrolysis tank 12A and the second pyrolysis tank 12B.

[0047] In the material regeneration apparatus 50 according to this second embodiment, intermittent switching (processing by intermittent switching) is performed in the first pyrolysis tank 12A and the second pyrolysis tank 12B, while continuous processing is performed in the other rotary kiln 52, the condensing system including the condenser 16, and the chimney 22, etc. The fluid in the rotary kiln 52 is molten plastic or a solid such as metal. The amount of decomposition gas generated in the rotary kiln 52 is small, and the moisture is vaporized.

[0048] Furthermore, according to the material regeneration apparatus 50 and material regeneration method of the second embodiment, it is possible to regenerate various materials from heated raw materials, including synthetic resin materials and metal materials, similar to the first embodiment. In addition, since a rotary kiln 52, a first pyrolysis tank 12A, and a second pyrolysis tank 12B are used, it is possible to regenerate materials more effectively. Moreover, when pyrolysis residue is discharged outside the system, there is a risk of fire due to blockage of pipes, etc., but this issue is resolved.

[0049] In the second embodiment, the first pyrolysis tank 12A and the second pyrolysis tank 12B may be intermittently switched without providing the rotary kiln 52. In this case, the raw material to be heated is fed into the first pyrolysis tank 12A and the second pyrolysis tank 12B, respectively.

[0050] <Inventions that can be extracted from each embodiment> From the embodiments described above, it is possible to extract, for example, the following inventions regarding the material regeneration method and material regeneration apparatus 10. (1) A pyrolysis process in which the raw material to be heated, which has been introduced into a pyrolysis tank (pyrolysis tank 12, first pyrolysis tank 12A, second pyrolysis tank 12B, etc.), A cooling step for cooling the pyrolysis oil obtained by pyrolysis in the pyrolysis tank, A storage step involves storing the cooled pyrolysis oil in a pyrolysis oil tank (such as pyrolysis oil tank 24), A condensation step is performed to condense the volatile components obtained by thermal decomposition in the aforementioned thermal decomposition tank, A material regeneration method comprising a discharge step of purifying and discharging the condensed volatile components. (2) In the thermal decomposition step, A thermal decomposition accelerator (PE, PP, etc.) can be added to the thermal decomposition tank. The material regeneration method according to (1) above, wherein if the raw material to be heated contains a material that acts as a thermal decomposition accelerator (such as PE or PP), the thermal decomposition is carried out using the material that acts as a thermal decomposition accelerator for the raw material to be heated. (3) The raw material to be heated is waste, The material recycling method according to (1) or (2) above, wherein the waste is at least one of the following: waste tires, solar panels, circuit boards, silicone gaskets, air conditioning pipes, carbon fibers, reinforced glass fibers, and specific organic compositions. (4) The material regeneration method described in (1) or (2) above, wherein the conditions for thermal decomposition satisfy the following: Temperature: 350~550℃ Pressure: Normal pressure Duration: 1-3 hours Pyrolysis accelerator: PE (polyethylene), PP (polypropylene) alone or in mixture (used in an amount of 20-100 wt% (more preferably 20-40 wt%) relative to the raw material to be heated (100%)) (5) The material regeneration method described in (4) above, wherein 1 to 3 wt% of slaked lime relative to the heated raw material (100%) is added to the pyrolysis tank. (6) A pyrolysis tank (pyrolysis tank 12, first pyrolysis tank 12A, second pyrolysis tank 12B, etc.) for pyrolyzing the raw material to be heated that has been introduced, A cooler (such as cooler 30) for cooling the pyrolysis oil obtained by pyrolysis in the pyrolysis tank, A pyrolysis oil tank (such as pyrolysis oil tank 24) for containing the cooled pyrolysis oil, The system includes a condenser (such as a condenser 16) for condensing the volatile components obtained by thermal decomposition in the thermal decomposition tank, A material regeneration device that purifies the condensed volatile components by a purification section (including an absorption tower 18, a fuel gas receiving tank 19, a seal pot 20, and a chimney 22) and discharges them. (7) A pyrolysis accelerator (PE, PP, etc.) can be added to the pyrolysis tank. The material regeneration apparatus according to (6) above, wherein the raw material to be heated contains a material that acts as a thermal decomposition accelerator (such as PE or PP), and in the case thereof, the thermal decomposition is performed using the material that acts as a thermal decomposition accelerator for the raw material to be heated. (8) The raw material to be heated is waste, The material recycling apparatus according to (6) or (7) above, wherein the waste is at least one of the following: waste tires, solar panels, circuit boards, silicone gaskets, air conditioning pipes, carbon fibers, reinforced glass fibers, and specific organic compositions. (9) The material regeneration apparatus described in (6) or (7) above, wherein the conditions for the thermal decomposition satisfy the following: Temperature: 350~550℃ Pressure: Normal pressure Duration: 1-3 hours Pyrolysis accelerator: PE (polyethylene), PP (polypropylene) alone or in mixture (used in an amount of 20-100 wt% (more preferably 20-40 wt%) relative to the raw material to be heated (100%)) (10) The material regeneration apparatus according to (9) above, wherein 1 to 3 wt% of slaked lime relative to the heated raw material (100%) is added to the pyrolysis tank.

[0051] <Other> The embodiments described above are merely examples of how the present invention can be implemented, and the technical scope of the present invention should not be interpreted as being limited by them. In other words, the present invention can be implemented in various forms without departing from its gist or its main features.

[0052] For example, in the material regeneration devices 10 and 50 shown in Figures 1 and 4, and in the material regeneration method performed by the material regeneration devices 10 and 50, tasks such as feeding the raw material to be heated into the pyrolysis receiving tank 14, managing conditions such as temperature and time, opening and closing various valve devices (valve devices 26, 29, 58, 60, 62, 64, 66, etc.), and removing residue can be performed manually or automatically. If these tasks are automated, continuous processing can be used to reduce labor or increase efficiency.

[0053] In this case, for example, temperature sensors are installed in the pyrolysis receiving tank 14, and a computer monitors the output of these sensors to determine whether the conditions for transferring the pyrolysis fuel oil have been met. A valve device (not shown) provided at the outlet of the pyrolysis receiving tank 14 is opened and closed according to the determination result of the computer and automatic control, thereby managing the discharge of the pyrolysis fuel oil. [Explanation of symbols]

[0054] 10,50: Material recycling equipment 12:Pyrolysis tank 12A: 1st pyrolysis tank 12B:Second pyrolysis tank 14:Pyrolysis tank 16: Condenser 18: Absorption Tower 19: Fuel gas receiving tank 20: Seal Pot 22: Chimney 24: Pyrolysis oil tank 26: Valve device 28: Circulating high-temperature pump 30: Cooler 32: Saucer 34:Heating furnace 36: Combustion burner 40: Piping

Claims

1. A pyrolysis process in which the raw material to be heated is thermally decomposed in a pyrolysis tank, A cooling step for cooling the pyrolysis oil obtained by pyrolysis in the pyrolysis tank, A storage step of storing the cooled pyrolysis oil in a pyrolysis oil tank, A condensation step is performed to condense the volatile components obtained by thermal decomposition in the aforementioned thermal decomposition tank, A material regeneration method comprising a discharge step of purifying and discharging the condensed volatile components.

2. In the aforementioned thermal decomposition step, A thermal decomposition accelerator can be added to the thermal decomposition tank. The material regeneration method according to claim 1, wherein, if the raw material to be heated contains a material that acts as a thermal decomposition accelerator, thermal decomposition is performed using the material that acts as a thermal decomposition accelerator for the raw material to be heated.

3. The aforementioned raw material to be heated is waste, The material recycling method according to claim 1 or 2, wherein the waste is at least one of the following: waste tires, solar panels, circuit boards, silicone gaskets, air conditioning pipes, carbon fibers, reinforced glass fibers, and specific organic compositions.

4. The material regeneration method according to claim 1 or 2, wherein the thermal decomposition conditions satisfy the following: Temperature: 350-550℃ Pressure: Normal pressure Duration: 1-3 hours Pyrolysis accelerator: PE (polyethylene), PP (polypropylene) alone or in mixture (used at an amount of 20 to 100 wt% relative to the raw material to be heated)

5. The material regeneration method according to claim 4, wherein 1 to 3 wt% of slaked lime is added to the raw material to be heated.

6. A pyrolysis tank for thermally decomposing the raw material to be heated, A cooler for cooling the pyrolysis oil obtained by pyrolysis in the pyrolysis tank, A pyrolysis oil tank for containing the cooled pyrolysis oil, The system includes a condenser for condensing volatile components obtained by thermal decomposition in the thermal decomposition tank, A material regeneration device that purifies the condensed volatile components using a purification treatment unit and then discharges them.

7. A thermal decomposition accelerator can be added to the thermal decomposition tank. The material regeneration apparatus according to claim 6, wherein, if the raw material to be heated contains a material that acts as a thermal decomposition accelerator, thermal decomposition is performed using the material that acts as a thermal decomposition accelerator for the raw material to be heated.

8. The aforementioned raw material to be heated is waste, The material recycling apparatus according to claim 6 or 7, wherein the waste is at least one of the following: waste tires, solar panels, circuit boards, silicone gaskets, air conditioning pipes, carbon fibers, reinforced glass fibers, and specific organic compositions.

9. The material regeneration apparatus according to claim 6 or 7, wherein the thermal decomposition conditions satisfy the following: Temperature: 350-550℃ Pressure: Normal pressure Duration: 1-3 hours Pyrolysis accelerator: PE (polyethylene), PP (polypropylene) alone or in mixture (used at an amount of 20 to 100 wt% relative to the raw material to be heated)

10. The material regeneration apparatus according to claim 9, wherein 1 to 3 wt% of slaked lime is added to the raw material to be heated.

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