Method for recycling used tire, method for manufacturing pyrolyzed product, pyrolyzed product, method for manufacturing rubber product, rubber product, method for manufacturing tire, and tire

Abstract

The method for recovering used tires comprises: a collection step (S1) for collecting used tires; a data acquisition step (S2) for acquiring, on the basis of the information read from the used tire, data on the used tire relating to at least one of the specification and the composition of the used tire; a classification step (S3) for classifying the used tires into groups on the basis of the data for the used tires; and a recovery processing step (S4) in which the classified used tires are subjected to recovery processing under appropriate conditions for each group.

Description

Technical Field

[0001] The present disclosure relates to a method for recycling used tires, a method for producing pyrolyzate, pyrolyzate, a method for producing rubber products, rubber products, a method for producing tires, and tires. Background Art

[0002] In the past, recycling has been carried out by pyrolyzing organic waste and extracting pyrolyzate from the produced oil for reuse. For example, Patent Document 1 describes a pyrolysis oil treatment system that can separate primary oil by controlling the temperature directly above the liquefied component collection device to obtain high-quality recycled oil.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2014-240460 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] Used tires include compound materials and are therefore generally difficult to recycle. In addition, used tires are sometimes classified by size based on the maximum size that can be processed by a recycling facility, but in the past, used tires have rarely been classified in any other way. Therefore, used tires including various components are recycled together, resulting in variations in the quality of the obtained pyrolyzate. Therefore, it is difficult to maintain the quality of recycled products such as tires made from pyrolyzate obtained by recycling. In addition, in order to make the quality of the pyrolyzate uniform, treatment is required, resulting in poor recycling efficiency.

[0008] In view of this situation, it would be helpful to provide a method for recycling used tires, a method for producing pyrolyzate, pyrolyzate, a method for producing rubber products, rubber products, a method for producing tires, and tires that can improve the quality of recycled products and recycling efficiency.

[0009] Solutions to the Problems

[0010] (1) A method for recycling used tires according to an embodiment of the present disclosure includes:

[0011] a collection step of collecting used tires;

[0012] a data acquisition step of acquiring data on the used tires regarding at least one of the specifications or components of the used tires based on information read from the used tires;

[0013] a classification step of classifying the used tires into groups based on the data on the used tires; and

[0014] Recycling process steps, under appropriate conditions for each of the groups, the classified used tires are recycled.

[0015] (2) According to the method for recycling used tires described in (1), as an embodiment of the present disclosure, wherein,

[0016] In the data acquisition step, the information read from the used tire includes the identification number of the used tire, and the data of the used tire is obtained by accessing a database through a network, in which the identification number is associated with the data of the used tire.

[0017] (3) According to the method for recycling used tires described in (1) or (2), as an embodiment of the present disclosure, wherein,

[0018] The data of the used tire includes at least one of the data of the category, type, size, rubber properties, manufacturer or manufacturing date of the used tire;

[0019] The classification step classifies the used tires based on at least one of the category, type, size, rubber properties, manufacturer or manufacturing date of the used tire.

[0020] (4) According to the method for recycling used tires described in (1) or (2), as an embodiment of the present disclosure, wherein,

[0021] The data of the used tire includes data on at least one of the polymer, filler or sulfur component of the used tire, and

[0022] The classification step classifies the used tires based on the data on at least one of the polymer, filler or sulfur component of the used tire.

[0023] (5) According to the method for recycling used tires described in any one of (1) to (4), as an embodiment of the present disclosure, wherein,

[0024] The data of the used tire includes data on the structure of the components of the used tire.

[0025] (6) According to the method for recycling used tires described in any one of (1) to (5), as an embodiment of the present disclosure, wherein,

[0026] In the classification step, multiple stages of grouping are performed based on the rubber blend of the tread or the wear state of the used tire.

[0027] (7) The method for recycling used tires according to any one of (1) to (6), as an embodiment of the present disclosure, wherein,

[0028] In the classification step, grouping is performed based on the compound content or reduction degree of oil, antioxidant, wax, or adhesive material in the used tires.

[0029] (8) The method for recycling used tires according to any one of (1) to (7), as an embodiment of the present disclosure, wherein,

[0030] The data of the used tires includes material information indicating the fiber type of the organic fiber.

[0031] (9) The method for manufacturing a pyrolyzate according to an embodiment of the present disclosure includes:

[0032] A collection step of collecting used tires;

[0033] A data acquisition step of acquiring data of the used tires regarding at least one of the specifications or components of the used tires based on the information read from the used tires;

[0034] A classification step of classifying the used tires into groups based on the data of the used tires;

[0035] A recycling treatment step of subjecting the classified used tires to a recycling treatment as pyrolysis under appropriate conditions for each group;

[0036] An extraction step of extracting the pyrolyzate produced by the pyrolysis.

[0037] (10) The pyrolyzate according to an embodiment of the present disclosure is manufactured by the method for manufacturing a pyrolyzate according to (9).

[0038] (11) The method for manufacturing a rubber product according to an embodiment of the present disclosure, wherein

[0039] The pyrolyzate manufactured by the method for manufacturing a pyrolyzate according to (9) is used as part of the raw material for manufacturing the rubber product.

[0040] (12) The rubber product according to an embodiment of the present disclosure is manufactured by the method for manufacturing a rubber product according to (11).

[0041] (13) The method for manufacturing a tire according to an embodiment of the present disclosure, wherein

[0042] The pyrolyzate manufactured by the method for manufacturing a pyrolyzate according to (9) is used as part of the raw material for manufacturing the tire.

[0043] (14) A tire according to an embodiment of the present disclosure is manufactured by the method of manufacturing a tire according to (13).

[0044] (15) A method for recycling used tires according to an embodiment of the present disclosure includes:

[0045] A collection step of collecting used tires;

[0046] A data acquisition step of acquiring data of the used tires regarding at least one of the specifications or components of the used tires based on information read from the used tires;

[0047] A step of decomposing the used tires into component members;

[0048] A classification step of classifying the component members of the used tires into groups based on the data of the used tires;

[0049] A recycling treatment step of performing a recycling treatment on the classified component members of the used tires under appropriate conditions for each group.

[0050] Effects of the Invention

[0051] According to the present disclosure, there can be provided a method for recycling used tires, a method for manufacturing pyrolyzates, pyrolyzates, a method for manufacturing rubber products, rubber products, a method for manufacturing tires, and tires that can improve the quality and recycling efficiency of recycled products. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In the drawings:

[0053] Figure 1 is a diagram showing an exemplary configuration of a recycling system for performing a method for recycling used tires according to an embodiment of the present disclosure;

[0054] Figure 2 is a diagram showing Figure 1 another diagram of an exemplary configuration of the recycling system shown in;

[0055] Figure 3 is a diagram showing data of a first used tire;

[0056] Figure 4 is a diagram showing data of a second used tire; and

[0057] Figure 5 is a flowchart showing the processing of a method for recycling used tires according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0058] In the following, with reference to the accompanying drawings, a method for recycling used tires, a method for producing pyrolyzates, pyrolyzates, a method for producing rubber products, rubber products, a method for producing tires, and tires according to embodiments of the present disclosure are described. In each figure, the same or equivalent parts are denoted by the same reference numerals. In the description of the present embodiments, the description of the same or equivalent parts is appropriately omitted or simplified.

[0059] Figure 1 and Figure 2 FIG. is a diagram showing an exemplary configuration of a recycling system 1 for performing a method for recycling used tires according to an embodiment of the present disclosure. The recycling system 1 includes an information processing device 10. The information processing device 10 is a device installed in a recycling facility, for example, for controlling the recycling facility. Figure 1 FIG. is a block diagram showing an exemplary internal configuration of the information processing device 10. Figure 2 FIG. shows the overall structure of the recycling system 1.

[0060] The recycling system 1 recycles tires 30. The tires 30 to be recycled are used tires and include, for example, scrapped tires brought about by tire replacement, scrapped vehicles, etc., and end-of-life tires (ELT) that have reached the end of the tire life. According to the present embodiment, the tires 30 are for passenger cars, trucks, buses, and other vehicles, but can be used, for example, for aircraft, mining, or agricultural purposes, and are not limited by the tire type. When the used tire 30 is pyrolyzed in a pyrolysis furnace, gas, oil, carbon black, wire, and ash are generated. According to the present embodiment, in particular, the oil is described as pyrolyzate 82. However, the pyrolyzate 82 is not limited to oil and can be, for example, carbon black and can be other products. The extracted pyrolyzate 82 is processed into a state that can be used as a raw material as needed and is recycled by being used as a part of the raw material of the tire 30 in the factory of the tire 30. Here, the extracted pyrolyzate 82 and its processed products can be used as a part of the raw material of rubber products other than the tire 30 in the factory of rubber products. The oil and the like extracted by the pyrolysis of used tires include components depending on the used tires (as an example, sulfur content [wt]). In order to maintain the quality of the tire 30 or rubber products using the pyrolyzate 82 as a raw material, it is important to reduce the quality change of the pyrolyzate 82.

[0061] As Figure 1As shown, the information processing apparatus 10 includes a communication unit 11, a storage unit 12, and a control unit 13. The control unit 13 includes a data acquisition unit 131, a classification unit 132, and an output unit 133. As a hardware configuration, the information processing apparatus 10 may be, for example, a computer. Details of the components of the information processing apparatus 10 are described below. Here, the recycling facility in which the information processing apparatus 10 is installed is not limited to a facility that performs all processes up to pyrolysis at one location. For example, as described below, a facility that classifies used tires and a facility that performs pyrolysis may be located at different locations or operated by different commercial operators. When the recycling facility includes a plurality of facilities, the information processing apparatus 10 may not be configured as a single apparatus, but may be configured as a plurality of apparatuses that are located at each facility and can send and receive data therebetween via a network 40. As a hardware configuration, the information processing apparatus 10 may include a single computer or may include a plurality of computers connected via the network 40. When the system includes a plurality of computers, the storage unit 12 may be a shared memory or the like that can be accessed by each computer.

[0062] The information processing apparatus 10 and a server 60 connected via the network 40 may constitute a recycling system 1. The network 40 may be, for example, the Internet. In addition, the network 40 may include, for example, a local area network (LAN). Further, the recycling system 1 may include a reading unit 70 and a recycling facility apparatus connected to the information processing apparatus 10.

[0063] For example, the server 60 is a computer separate from the information processing apparatus 10. According to the present embodiment, the server 60 is a computer of a manufacturer of tires 30 that stores and manages information about the tires 30 to be manufactured in a database. The information processing apparatus 10 can access the database via the network 40. The information processing apparatus 10 retrieves data of used tires regarding at least one of the specifications or components of used tires 30 (used tires) from the database for proper recycling. Conventionally, information about the tires 30 has been used only at the manufacturing site (factory) and has been rarely used in recycling. According to the present embodiment, Figure 2 the system shown in can be configured such that the information processing apparatus 10 can utilize the data of used tires in subsequent recycling, classification, etc.

[0064] The reading unit 70 may be a general-purpose mobile terminal, such as a smartphone or a tablet device, but is not limited to such a mobile terminal as long as the reading unit 70 has a photographing function. As another example, the reading unit 70 may be a photographing device such as a camera. The reading unit 70 may be used by a manager, an operator, etc. of the recycling facility.

[0065] According to the present embodiment, each of the tires 30 is marked with an indication portion 31 including an identifier 32. The indication portion 31 can be provided by adhesion, printing, or kneading into the rubber of the tire 30. The reading portion 70 can capture an image of the identifier 32 marked on the tire 30 through a camera function and output the image of the identifier 32 to the information processing device 10. The control portion 13 of the information processing device 10 can identify the identification number, model, etc. independently marked on the tire 30 based on the identifier 32. The camera function can be implemented by, for example, a camera of the reading portion 70. The identifier 32 can be, for example, a two-dimensional code, but is not limited to this example. For example, a bar code, a mark indicating a specific color, a serial code, etc. can be used as the identifier 32. In addition, the identification number can include letters, reference marks, etc., and is not limited to just numbers. The identifier 32 is not limited to a dedicated identifier and can be, for example, a product name, a manufacturer name, various reference marks, etc. displayed on the sidewall portion, etc. The mark indicating a specific color is not limited to colors distinguishable by the human eye, but includes, for example, very small amounts of colors detectable by a device and colors in the invisible light range.

[0066] The recycling system 1 is not limited to a configuration including the indication portion 31 and the reading portion 70 having a camera function. As another example, the recycling system 1 can include an RFID tag and a reading portion 70 that reads radio waves from the RFID tag. In this case, the control portion 13 can obtain information such as the number and model of the tire 30 from the reading portion 70. As another example, the recycling system 1 can include a marking substance mixed into the rubber and a reading portion 70 that detects the marking substance. Here, the marking substance is an identifier that distinguishes a specific rubber from other rubbers.

[0067] The components of the information processing device 10 are described in detail below. The communication portion 11 includes at least one communication module configured to connect to the network 40. The communication portion 11 can include, for example, a communication module compatible with a mobile communication standard such as 4G (fourth generation) or 5G (fifth generation). The communication portion 11 can include, for example, a communication module compatible with a wireless LAN standard (as an example, IEEE 802.11). In addition, the communication portion 11 can include, for example, a communication module compatible with a wired LAN standard.

[0068] The storage portion 12 includes at least one memory. The memory can be any memory, including but not limited to, for example, a semiconductor memory, a magnetic memory, or an optical memory. The storage portion 12 can be, for example, built into the information processing device 10 and can be configured to be accessed from outside the information processing device 10 via any interface.

[0069] The storage portion 12 stores various data used in various calculations executed by the control portion 13. In addition, the storage portion 12 can store the results and intermediate data of various calculations executed by the control portion 13.

[0070] In addition, the storage unit 12 can store data of used tires obtained via the communication unit 11. As described above, the data of used tires includes data on at least one of the specifications or components of the used tires. The tires 30 as used tires are classified and recycled with reference to the data of used tires. The data of used tires stored in the storage unit 12 can be updated, for example, periodically or when the recycling facility is started, based on the database of the manufacturer of the tires 30. Information on the components of used tires can be obtained from the product information in the new condition, or can be inferred based on the condition of used tires or corrected with respect to the product information in the new condition. For example, based on the identifier 32, the identification number, model, etc. of the tire 30 can be determined, and the product information managed according to the identification number, model, etc. can be obtained. In addition, for example, when the used tire is worn, correction can be made to subtract a part of the tread rubber mixture or compound from the product information in the new condition according to the wear state.

[0071] Figure 3 is a chart showing data of the first used tires. The data of the first used tires mainly includes data on the specifications of the used tires. In Figure 3 the example, the data of the first used tires is a table in which the identification number individually assigned to the used tire is associated with the model and other specifications of the used tire. In addition, the data of the first used tires can include at least one of data on the category, type, size, rubber properties, manufacturer, or manufacturing date of the used tires. The category of used tires can be classification according to vehicle type, such as passenger car radial (PSR), truck and bus radial (TBR), etc. The type of used tires can be classification according to function, such as non-studded snow, run-flat, summer, etc. The size of used tires can be numerical values of the specifications, such as width, aspect ratio, rim diameter, etc. The rubber properties of used tires can be numerical values representing performance, such as rolling resistance coefficient, modulus of elasticity, etc. The manufacturer of used tires can be, for example, the name of the manufacturer. The manufacturing date of used tires can be, for example, the year and month of manufacture. The data of the first used tires can be a part of the data managed and stored in the database by the manufacturer of the tires 30 that have become used tires. The information processing device 10 can access the database via the network 40 to obtain the data of the first used tires and store the data of the first used tires in the storage unit 12. Here, the data of the first used tires can also include data on the structure of the components of the used tires. The data on the structure of the components can be, for example, data on the arrangement, shape, size, hardness, etc. of each component, such as the tread, sidewall, etc. The data on the structure of the components can include, for example, diagrams showing cross-sections, images, etc.

[0072] In addition, Figure 4 is a graph showing data of the second used tire. The data of the second used tire mainly includes data on the composition of the used tire. In Figure 4 example, the data of the second used tire is a table in which a part of the specifications of the used tire (model and manufacturing date) is associated with the composition information of the components of the used tire, such as blend, polymer molecular weight, etc. The data of the second used tire may include data on at least one of the polymer, filler, or sulfur component of the used tire. The data on the polymer component of the used tire may be, for example, information on molecular weight, whether butyl rubber is included, etc. Here, the filler is blended to reinforce the rubber composition, for example, carbon black. In addition, in addition to carbon black, inorganic fillers such as silica, clay, talc, calcium carbonate, aluminum hydroxide, etc. are also examples. The data on the filler component of the used tire may be, for example, information on whether silica is included, carbon black grade, etc. The carbon black grade may have classifications, such as super abrasion furnace (SAF; super abrasion resistance), medium SAF (medium abrasion resistance), etc. The data on the sulfur component of the used tire may be, for example, a numerical value of the amount (content). The data of the second used tire may be a part of the data managed and stored in a database by the manufacturer of the tire 30 that has become the used tire. The information processing device 10 may access the database via the network 40 to obtain the data of the second used tire and store the data of the second used tire in the storage unit 12. Here, the data of the second used tire may also include data on polymers, fillers, sulfur, and different compounds and regulated substances.

[0073] Here, as described above, the data of the second used tire is a table in which a part of the specifications of the used tire is associated with the composition information of the used tire. Therefore, the data of the first used tire can be associated with the data of the second used tire through the specifications of the used tire included in the two sets of data. According to the present embodiment, the data of the used tire is managed as two tables, but the data of the used tire may be integrated and managed as a single table. In addition, according to the present embodiment, the data of the used tire is stored in the storage unit 12 by the information processing device 10. As another example of management, decentralized management may be performed on the data of the used tire. For example, blockchain technology may be used to store and manage the data of the used tire.

[0074] The control unit 13 is at least one processor. The processor may be, but is not limited to, a general-purpose processor or a dedicated processor for specific processing, and may be any processor. The control unit 13 controls the overall operation of the information processing device 10. In addition, the control unit 13 controls the recycling process at the recycling facility where the information processing device 10 is installed.

[0075] Referring again to Figure 2 , the recycling facility includes a collection unit 80 for collecting used tires. The collection unit 80 is a device different from the information processing device 10 and is controlled by the information processing device 10, and may include, for example, a robot arm. Further, according to the present embodiment, the recycling facility includes a sorting unit 81 for sorting used tires into groups. The sorting unit 81 is a device different from the information processing device 10 and is controlled by the information processing device 10, and may include, for example, a belt conveyor. In the Figure 2 example, three groups are shown as G1 to G3, but the number of groups is not limited to three. Further, according to the present embodiment, the recycling facility includes a recycling processing unit for performing a recycling process according to the conditions of each group. The recycling processing unit is a device different from the information processing device 10 and is controlled by the information processing device 10, and may be, for example, a pyrolysis processing device. According to the present embodiment, the information processing device 10 controls the recycling process in the recycling facility by controlling the collection unit 80, the sorting unit 81, and the recycling processing unit.

[0076] The information processing device 10 may have the following software configuration. At least one program for controlling the operation of the information processing device 10 is stored in the storage unit 12. The program stored in the storage unit 12 causes the processor of the control unit 13 to function as a data acquisition unit 131, a classification unit 132, and an output unit 133 when read by the processor.

[0077] The data acquisition unit 131 acquires data of used tires regarding at least one of the specifications or components of the used tires based on the information read from the used tires. According to the present embodiment, the information read from the used tires includes the identification number of the used tires. When the data of the used tires stored in the storage unit 12 includes the identification number of the used tires being processed, the data acquisition unit 131 may acquire the data of the used tires from the storage unit 12. When the data of the used tires in the storage unit 12 does not include the identification number of the used tires being processed, the data acquisition unit 131 may acquire the data of the used tires by accessing a database in which the identification number is associated with the data of the used tires via the network 40. That is, the recycling facility does not need to have all the data of used tires, and can use the database managed by the manufacturer of the tire 30 to accurately classify the used tires and perform appropriate recycling, as described below.

[0078] The classification unit 132 classifies used tires into groups based on the data of the used tires acquired by the data acquisition unit 131. A group is a collection of used tires that are similar in terms of the components included. The used tires are grouped in order to suppress quality variations in the products (pyrolyzates 82 according to the present embodiment) produced by the recycling process (pyrolysis according to the present embodiment) and to achieve a desired quality.

[0079] The classification unit 132 may classify the used tires based on the specification data included in the data of the used tires. For example, using the data of the first used tire, the classification unit 132 may classify the used tires based on at least one of the category, type, size, rubber properties, manufacturer, or manufacturing date of the used tire. In this case, by classifying as tire 30, the used tires can be indirectly classified by components. For example, a specific type of tire 30 from the same manufacturer may include similar components. Therefore, by grouping the used tires according to the manufacturer and type, quality variations in the pyrolyzate 82 can be suppressed. In addition, the same or nearly the same manufacturing date is not expected to cause significant changes in the components of the tire 30. Therefore, by grouping the used tires according to the manufacturer, type, and manufacturing time, quality variations in the pyrolyzate 82 can be further suppressed. Even when, for example, the manufacturer of the tire 30 does not provide data on the components (corresponding to the data of the second used tire), the classification unit 132 may classify the used tires based on the specification data included in the data of the used tires.

[0080] The classification unit 132 may classify the used tires based on the component data included in the data of the used tires. For example, using the data of the second used tire, the classification unit 132 may classify the used tires based on data on at least one of the polymer, filler, or sulfur component of the used tire. In this case, the used tires can be directly classified by components. Therefore, compared with indirect classification, the suppression of quality variations in the pyrolyzate 82 can be more effective.

[0081] In addition, when the data of the used tires includes data on the structure of the components of the used tires, the classification unit 132 may also group the used tires based on the components of the used tires. In this case, based on the data on the structure of the components of the used tires, the used tires including composite components can be easily disassembled component by component. Grouping after disassembling into multiple components can increase the effectiveness of suppressing quality variations in the pyrolyzate 82. According to the present embodiment, grouping includes not only grouping the used tires themselves but also disassembling the used tires into component parts and grouping by the component parts.

[0082] The output unit 133 can output information such as groups (the classification unit 132 classifies used tires into groups) to a display device or other devices, so that the manager or operator of the recycling facility can be notified. The display device can be, for example, a display included in the reading unit 70. In addition, the display device can include a display or the like connected to the information processing device 10.

[0083] Figure 5 is a flowchart showing the processing of the method for recycling used tires according to the present embodiment performed by the recycling system 1.

[0084] Used tires are collected by the collection unit 80 (step S1, collection step). The identifier 32 of the collected used tires is read by the reading unit 70. According to the present embodiment, the information read from the used tires includes the identification number of the collected used tires (i.e., the used tires being processed).

[0085] Based on the information read from the used tires, the data acquisition unit 131 obtains data of the used tires from the storage unit 12 or the manufacturer's database via the network 40 as described above (step S2, data acquisition step).

[0086] The classification unit 132 classifies the used tires into groups based on the data of the used tires (step S3, classification step). In addition, the control unit 13 can control the classification unit 81 so that the used tires are transported to the recycling processing unit of the group to which the used tires are assigned. In addition, the classified used tires or components can be cut, crushed or otherwise processed as needed before being transported to the recycling processing unit.

[0087] The recycling processing unit performs recycling processing on the classified used tires or components under appropriate conditions for each group (step S4, recycling processing step). Here, the conditions for recycling processing are, for example, the operating conditions of the pyrolysis processing device. For example, according to the group, the temperature setting, processing time, etc. of the pyrolysis processing device change. In this way, the used tires or component members are grouped, and in each group, recycling processing is performed on each group under appropriate conditions to obtain the pyrolyzate 82 of each group. The pyrolyzate 82 of each group is made from used tires including similar components, and products with desired qualities with little variation are produced. Here, the appropriate conditions are defined for each group and include temperature setting, processing time, and other operating conditions adjusted to improve the efficiency of recycling processing. Therefore, although the appropriate conditions usually vary between different groups, different groups may finally have the same conditions.

[0088] Here, Figure 5The method of recycling used tires in [the method] constitutes a method of manufacturing pyrolyzate by setting the recycling process as pyrolysis and further including an extraction step to extract the pyrolyzate 82 produced by pyrolysis. The method of manufacturing pyrolyzate manufactures high-quality pyrolyzate. In addition, the pyrolyzate 82 or its processed products manufactured by the method of manufacturing pyrolyzate can be used as part of the raw materials to manufacture tires 30 or rubber products with high quality. That is to say, the method of manufacturing pyrolyzate and the steps of manufacturing tires 30 or rubber products can constitute a method of manufacturing tires 30 or rubber products. Here, the tire 30 can be newly manufactured or can be a retread tire. That is to say, the method of manufacturing tires 30 includes the method of manufacturing retread tires.

[0089] As described above, the method of recycling used tires according to the present embodiment can improve the quality and recycling efficiency of the recycled products through appropriate classification of components. In addition, using the recycling method, there are provided a method of manufacturing pyrolyzate, a method of manufacturing rubber products, and a method of manufacturing tires that can manufacture high-quality raw materials (pyrolyzate 82) or products. The pyrolyzate, rubber products, and tires manufactured by these manufacturing methods have higher quality than previous products.

[0090] Although the embodiments of the present disclosure have been described based on the drawings and examples, it should be noted that those skilled in the art can make variations and modifications based on the present disclosure. Therefore, it should be noted that such variations and modifications are included within the scope of the present disclosure. For example, the functions, etc. included in each component, etc. can be rearranged, and multiple components, etc. can be combined into one or separated, as long as there are no logically inconsistent results. The embodiments according to the present disclosure can be implemented as a method, a program executed by a processor provided to a device, or a storage medium storing the program. The scope of the present disclosure should be understood to include these examples.

[0091] For example, to further improve quality, grouping of used tires at a recycling facility can be performed based on the compound content or degree of reduction of oil, anti-aging agent, wax, or adhesive material in the used tires. Such classification can, for example, appropriately exclude impurities (such as Co) contained in the carbon black, oil (such as terpene oil), anti-aging agent, etc. obtained by pyrolysis. Here, the compound content and degree of reduction can be estimated based on information at the time of manufacturing a new product from the product (hereinafter also referred to as the "original product") before the used tire was discarded. Information at the time of manufacturing a new product can be obtained from a computer, etc. of the manufacturer of the original product of the used tire. Information at the time of manufacturing a new product can include, for example, compound content, mixing ratio, manufacturing date, recycled raw material information, etc. In addition, the compound content and degree of reduction can be estimated by further obtaining information at the time of use of the original product, and can be based on information at the time of manufacturing a new product and information at the time of use of the original product. The compound content and degree of reduction can be estimated by preparing a degradation model in advance based on past performance data and inputting information at the time of manufacturing a new product into the degradation model. The degradation model can be generated by, for example, machine learning.

[0092] Here, to obtain information on the original product at the time of use, the original product needs to be managed separately. For example, when the original product is tire 30, information such as an identification number, model number, etc. is specified by an indicating unit 31. The recycling system 1 can also include a management device (such as a computer connected via a network 40) for managing such information for tire 30. By associating information in a table, etc., the management device for tire 30 can also manage information at the time of use other than the identification number, model number, etc. The information processing device 10 can also access the table managed by the management device for tire 30. Information at the time of use, such as a driving history, the wear state of tire 30, and other measured values, may have been input by a worker at a maintenance and inspection work site of a vehicle equipped with tire 30, the original product, and sent to the management device for tire 30 as information at the time of use. In addition, when tread retreading, etc. is performed on tire 30, information such as the number of times tread retreading has been performed can be input by the worker and sent to the management device for tire 30 as information at the time of use. In the above processing of grouping and classifying used tires, correction (such as increasing the degree of reduction) of the estimation of the compound content and degree of reduction can be performed according to the usage of the original product (for example, having undergone multiple tread retreads, high wear, etc.). Here, the wear state can be a measured value or a predicted value based on a known prediction method based on a driving history or manufacturing date.

[0093] For further quality improvement, multiple stages of grouping can be performed when classifying used tires into groups, especially based on the rubber blend of the tread or the wear state of the used tires. Considering the rubber blend of the tread to control the influence of substances such as silica in the tread on the pyrolyzate. In addition, as described above, the wear state of the used tires is used to correct product information. Therefore, the corrected component information of the used tires can be considered for grouping.

[0094] In addition, the data of used tires is described as including data on components such as polymers, fillers, sulfur, etc., but can also include information on the materials of the used tires (material information). Then, the material information can be used for the group classification of used tires. The material information can indicate, for example, how many times (if any) some of the materials constituting the used tires have been recycled. The material information can indicate, for example, what organic fibers are included. For example, the material information can indicate the fiber type of the organic fibers, such as PET, nylon, aramid, etc. For example, based on the material information, sorting aramid, etc., or sorting by including or not including nitrogen atoms is preferred in terms of the stable quality of the oil obtained by recycling. In addition, based on the material information, it is preferred to separate carbon black with and without silica, for example, in order to stabilize the quality of the carbon black obtained in the recycling process. In addition, the material information can include information on the inner liner. In this case, based on the material information in the set of inner liners, according to whether the inner liner is halogenated butyl rubber (Cl, Br), the amount of halogen in the butyl rubber obtained by recycling can be reduced by sorting the inner liners.

[0095] In addition, the method of recycling used tires can also include the step of decomposing the used tires into component parts, and in the recycling treatment step, the component parts of the classified used tires can be subjected to recycling treatment under appropriate conditions for each group. By dividing the used tires into component parts, such as the tread, sidewall, and inner liner, and grouping by component parts, more efficient recycling can be achieved. In addition, the quality of the carbon black or oil obtained by recycling can be improved. Here, decomposing into component parts is not limited to decomposing into the smallest units. For example, the tread can be decomposed to include crown rubber, base rubber, and belts (as tread parts). In addition, as needed, decomposing into component parts can be, for example, steel parts that become the smallest units.

[0096] List of Reference Numerals

[0097] 1 Recycling system

[0098] 10 Information processing device

[0099] 11 Communication unit

[0100] 12 Storage unit

[0101] 13 Control Unit

[0102] 30 Tire

[0103] 31 Indicator

[0104] 32 Identifier

[0105] 40 Network

[0106] 60 Server

[0107] 70 Reading Unit

[0108] 80 Collection Unit

[0109] 81 Classification Unit

[0110] 82 Pyrolyzate

[0111] 131 Data Acquisition Unit

[0112] 132 Classification Unit

[0113] 133 Output Unit

Claims

1. A method for recycling used tires, the method comprising: A collection step of collecting used tires; A data acquisition step of acquiring data of the used tires regarding at least one of the specifications or components of the used tires based on information read from the used tires; A classification step of classifying the used tires into groups based on the data of the used tires; And A recycling treatment step of performing a recycling treatment on the classified used tires under appropriate conditions for each group.

2. The method for recycling used tires according to claim 1, wherein, In the data acquisition step, the information read from the used tires includes the identification number of the used tires, and the data of the used tires is acquired by accessing a database via a network, in which the identification number is associated with the data of the used tires.

3. The method for recycling used tires according to claim 1 or 2, wherein, The data of the used tires includes at least one of the data of the category, type, size, rubber properties, manufacturer or manufacturing date of the used tires, and The classification step classifies the used tires based on at least one of the category, type, size, rubber properties, manufacturer or manufacturing date of the used tires.

4. The method for recycling used tires according to claim 1 or 2, wherein, The data of the used tires includes data regarding at least one of the polymer, filler or sulfur component of the used tires, and The classification step classifies the used tires based on the data regarding at least one of the polymer, the filler or the sulfur component of the used tires.

5. The method for recycling used tires according to any one of claims 1 to 4, wherein, The data of the used tires includes data regarding the structure of the components of the used tires.

6. The method for recycling used tires according to any one of claims 1 to 5, wherein, In the classification step, grouping in multiple stages is performed based on the rubber blend of the tread or the wear state of the used tires.

7. The method for recycling used tires according to any one of claims 1 to 6, wherein, In the classification step, grouping is performed based on the compound content or reduction degree of oil, antioxidant, wax or adhesive material in the used tires.

8. The method for recycling used tires according to any one of claims 1 to 7, wherein the data of the used tires includes material information indicating the fiber type of the organic fiber.

9. A method for manufacturing a pyrolyzate, the method comprising: A collection step of collecting used tires; A data acquisition step of acquiring data of the used tires regarding at least one of the specifications or components of the used tires based on information read from the used tires; A classification step of classifying the used tires into groups based on the data of the used tires; And A recycling treatment step of performing a recycling treatment as pyrolysis on the classified used tires under appropriate conditions for each group; An extraction step of extracting the pyrolyzate produced by the pyrolysis.

10. A pyrolyzate manufactured by the method for manufacturing a pyrolyzate according to claim 9.

11. A method for manufacturing a rubber product, wherein, The pyrolyzate produced by the method for producing a pyrolyzate according to claim 9 is used as part of the raw material for producing the rubber product.

12. A rubber product produced by the method for producing a rubber product according to claim 11.

13. A method for manufacturing a tire, wherein the pyrolyzate produced by the method for producing a pyrolyzate according to claim 9 is used as part of the raw material for manufacturing the tire.

14. A tire produced by the method for manufacturing a tire according to claim 13.

15. A method for recycling used tires, the method comprising: a collection step of collecting used tires; a data acquisition step of acquiring data of the used tires regarding at least one of the specifications or components of the used tires based on information read from the used tires; a step of disassembling the used tires into component members; a classification step of classifying the component members of the used tires into groups based on the data of the used tires; a recycling treatment step of subjecting the classified component members of the used tires to recycling treatment under appropriate conditions for each group.

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