JP7213636B2 - Waste separation apparatus and separation method, and waste treatment system and treatment method - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a waste sorting apparatus and method, and a waste treatment system and method.

Carbon fiber reinforced plastics (CFRP) are used in various applications such as daily necessities, personal computers, home appliances, automobiles, aircraft, sporting goods, and construction and civil engineering fields, making use of the properties of carbon fibers such as light weight and high strength. Shredder dust from the disposal of these products may contain carbon fibers. As a method for disposing of such carbon fiber-containing waste, a technique of incinerating the waste using a cement kiln is known. In such a technique, the waste is pulverized to a particle size of, for example, 3 mm or less before incineration.

Patent Literature 1 proposes adding an aqueous solution of a surfactant in order to improve pulverizability while suppressing dust generation when pulverizing CFRP. Further, Patent Document 2 proposes a technique in which CFRP is heat-treated under predetermined conditions to improve pulverizability, and the pulverized material obtained by pulverizing after the heat treatment is used as fuel for a cement manufacturing apparatus.

Japanese Patent Application Laid-Open No. 2018-51988 JP 2017-66383 A

Carbon fibers contained in waste have high strength and are not easily combustible, while plastics and the like contained in the same waste have lower strength and are more combustible than carbon fibers. As described above, waste containing carbon fibers contains components with greatly different characteristics, and if these components can be sorted according to their different characteristics, waste disposal can be expected to be facilitated.

Accordingly, the present disclosure provides a waste sorting apparatus and a waste sorting method that enable smooth processing of waste containing carbon fibers. In addition, the present invention provides a waste disposal system and disposal method capable of smoothly disposing of waste containing carbon fibers.

A waste sorting apparatus according to one aspect of the present disclosure includes an information acquisition unit that acquires position information of waste from an image of a waste group that includes a plurality of wastes containing carbon fibers, and a conductivity measuring unit for measuring the conductivity of the collected waste; and based on the conductivity measurement result, the waste group is divided into at least a first waste and a second waste having a lower conductivity than the first waste. and a sorting unit that sorts into and.

The sorting apparatus includes a conductivity measuring section that measures the conductivity of the waste based on the positional information acquired by the information acquiring section. The sorting section sorts the waste group into at least a first waste and a second waste having a lower conductivity than the first waste based on the conductivity measurement result of the conductivity measuring section. Since carbon fibers generally have a higher conductivity than waste components such as plastics, rubber, and waste paper, the measurement results of conductivity can be used to extract carbon fibers from waste groups containing such waste components. Fiber-containing waste can be efficiently separated. After sorting, it becomes possible to perform appropriate treatment according to the components contained in the waste. For example, the carbon fibers may be recovered from the first waste containing carbon fibers and recycled. On the other hand, the second waste, which is less conductive than the first waste, may be subjected to heat treatment or pulverization treatment. The second waste can reduce the equipment load of the heat treatment or the pulverization treatment because the carbon fiber, which has high strength and does not burn easily, is reduced among the components contained in the waste.

In this way, it is possible to arbitrarily set the configuration of downstream devices for each sorted waste, and to perform treatment suitable for each waste. Further, since the separation of the first waste and the second waste portion is performed based on the measurement result of conductivity, the waste can be easily separated. Therefore, this sorting device makes it possible to smoothly dispose of waste containing carbon fibers.

The sorting unit may comprise a robotic arm configured to grip the waste. By providing the sorting unit with a robot arm, the waste group can be easily sorted without crushing the waste into smaller sizes. Electrodes of the conductivity measurement unit may be attached to the robot arm. This makes it possible to simplify the device structure and reduce the installation space of the device.

The information acquisition unit may acquire the shape information of the waste together with the position information of the waste from the image. Thereby, the sorting by the sorting section can be performed with higher accuracy.

The information acquisition unit may acquire image information derived from the carbon fibers from the image, and the conductivity measurement unit may measure the conductivity of the waste based on the position information and the image information. By using not only the position information but also the image information, the waste containing carbon fibers can be efficiently sorted. Therefore, sorting can be performed with higher accuracy.

A waste treatment system according to one aspect of the present disclosure includes the sorting device described above and a post-treatment section that acid-treats or heat-treats at least a portion of the first waste. Since this waste treatment system is equipped with the sorting device described above, it is possible to smoothly treat the waste containing carbon fibers.

A waste sorting method according to one aspect of the present disclosure includes obtaining positional information of waste from an image of a waste group including a plurality of wastes containing carbon fibers, and conducting waste based on the positional information. and sorting the waste group into at least a first waste and a second waste having a lower conductivity than the first waste based on the conductivity measurement. .

In the above sorting method, the conductivity of the waste is measured based on the positional information obtained from the image of the waste group, and based on the measurement result, the waste group is divided into at least the first waste and the second waste. are separated into Carbon fibers usually have a higher conductivity than waste components such as plastics, rubber, and waste paper. Waste can be separated efficiently. After sorting, it becomes possible to perform appropriate treatment according to the components contained in the waste. For example, the carbon fibers may be recovered from the first waste containing carbon fibers and recycled. On the other hand, the second waste, which is less conductive than the first waste, may be subjected to heat treatment or pulverization treatment. The second waste can reduce the work load of heat treatment or pulverization treatment because the carbon fiber, which has high strength and does not burn easily, is reduced among the components contained in the waste.

In this way, it becomes possible to arbitrarily select a downstream process for each sorted waste, and it is possible to perform treatment suitable for each waste. Since the separation of the first waste and the second waste is performed based on the measurement result of the conductivity, the waste can be easily separated. Therefore, this sorting method makes it possible to smoothly treat waste containing carbon fibers.

A method for treating waste according to one aspect of the present disclosure includes measuring conductivity of a group of wastes including a plurality of wastes containing carbon fibers, and measuring the conductivity of the group of wastes based on the measurement result of at least Separating into a first waste and a second waste having a lower electrical conductivity than the first waste, and subjecting at least a portion of the first waste to acid treatment or heat treatment.

This waste disposal method measures the conductivity of the waste based on the positional information obtained from the image of the waste group, and classifies the waste group as at least a first waste and this waste based on the measurement result. It is sorted into secondary waste that has lower conductivity than waste. Since carbon fibers generally have a higher conductivity than waste components such as plastics, rubber, and waste paper, the measurement results of conductivity can be used to extract carbon fibers from a group of wastes containing these waste components. Waste containing can be separated efficiently. Since the first waste separated by such a simple method is subjected to acid treatment or heat treatment, waste containing carbon fibers can be smoothly treated.

Advantageous Effects of Invention According to the present disclosure, it is possible to provide a waste sorting apparatus and a waste sorting method that enable smooth processing of waste containing carbon fibers. In addition, it is possible to provide a waste disposal system and disposal method capable of smoothly disposing of carbon fiber-containing waste.

It is a schematic diagram which shows an example of the sorting apparatus of waste. It is a schematic diagram which shows another example of the sorting|sorting apparatus of waste. 1 is a schematic diagram showing an example of a waste disposal system; FIG.

An embodiment of the present invention will be described below with reference to the drawings as the case may be. However, the following embodiments are examples for explaining the present invention, and are not intended to limit the present invention to the following contents. In the description, the same reference numerals are used for the same elements or elements having the same function, and overlapping descriptions are omitted in some cases. In addition, unless otherwise specified, positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings. Furthermore, the dimensional ratio of each element is not limited to the illustrated ratio.

A waste sorting apparatus according to one embodiment includes an information acquisition unit that acquires positional information of waste from an image of a group of wastes containing a plurality of wastes containing carbon fibers; A conductivity measuring unit that measures conductivity, and a waste group is divided into first waste having conductivity and second waste having lower conductivity than the first waste based on the conductivity measurement result. and a sorting section for sorting. The sorting unit may sort the waste group into a first waste containing carbon fibers and a second waste not containing carbon fibers. Also, the sorting unit may sort the waste group into three or more groups, for example, according to the conductivity of the waste. For example, when sorting a group of wastes containing a considerable amount of metals, the sorting unit uses the wastes containing metals as the first waste and the wastes containing carbon fibers as the second waste according to the electrical conductivity. , and the third waste may be separated into waste mainly composed of components other than metal components and carbon fibers. The conductivity measuring part is in direct contact with the waste when measuring the conductivity of the waste.

Examples of carbon fibers contained in the waste include those produced by carbonizing acrylic fibers or pitch as a raw material at a high temperature. The waste may or may not contain carbon fiber reinforced composites (CFRP). Examples of carbon fiber composite materials include those in which carbon fibers are combined with thermoplastic resins such as polyethylene, polypropylene and polystyrene, or thermosetting resins such as phenol resins and epoxy resins.

The waste may originate from daily necessities, personal computers, home appliances, automobiles, aircraft, sporting goods, construction and civil engineering fields, and the like. These wastes may be shredder dust resulting from the disposal of automobiles, household appliances and the like. The waste may contain not only carbon fibers but also resin components such as plastics. The waste may contain foreign matter such as metal and rubber in addition to the carbon fiber and resin components.

The information acquisition unit acquires position information and shape information of each waste from, for example, an image of a group of wastes circulating on the transport path. The information acquisition unit may include a camera and an information processing unit, and may use the camera to capture a visible light image of the surface of each waste contained in the waste group. The image may be a moving image or a still image. The information processing section obtains position information and shape information of the waste from the image.

Carbon fibers have characteristic shapes, patterns, and colors compared to other wastes, such as a mesh pattern or a shape in which fibers protrude from the surface. Therefore, the information processing unit of the information acquisition unit is highly likely to contain carbon fiber-containing waste or carbon fiber based on the characteristic shape, pattern, and color derived from the carbon fiber from the image. Waste may be detected. If the waste group is sorted based on the combination of the positional information and the image information acquired by the information acquiring section, the waste containing carbon fiber can be sorted with higher accuracy. The information acquisition unit may acquire an X-ray image of the inside of the waste, or may acquire an image using a nuclear magnetic resonance phenomenon. By imaging the surface structure and internal structure of the waste in this manner and combining a plurality of types of images, it is possible to increase the accuracy of detecting carbon fibers.

FIG. 1 is a schematic diagram showing an example of the waste sorting apparatus of the present embodiment. The sorting apparatus 100 includes an information acquisition unit 10 that acquires positional information of waste from an image of a waste group 50 including a plurality of wastes, and a conductivity measurement unit 20 that measures the conductivity of the waste based on the positional information. and a sorting unit 30 that sorts the waste group 50 into a first waste 51 and a second waste 52 having a lower conductivity than the first waste 51 based on the conductivity measurement result.

A waste group 50 containing a plurality of wastes is fed onto conveyor 36 (left side of FIG. 1) in sorting apparatus 100 . A waste group 50 supplied onto the conveyor 36 is conveyed by the conveyor 36 from left to right in FIG.

The information acquisition unit 10 is equipped with a camera that captures still images or moving images of the waste group 50 . An image captured by a camera is processed by, for example, an information processing section to obtain positional information of the waste. The obtained position information is output to the conductivity measuring section 20 . The information acquisition unit 10 may output the shape information of the waste obtained from the image to the conductivity measurement unit 20 together with the position information.

The information acquisition unit 10 may be configured to detect image information (pattern, shape, color, etc.) derived from the carbon fiber in the image. Image information derived from carbon fibers includes a mesh pattern derived from fibers, a fuzzy shape and a burly shape, black or a color close to black, and the like.

The control unit 22 of the conductivity measuring unit 20 receives the positional information of the waste and optionally the shape information (hereinafter collectively referred to as “positional information, etc.”) from the information acquisition unit 10 . The control unit 22 controls the position of the electrode 24 based on the positional information of the waste and brings the electrode 24 into contact with the waste. Electrode 24 has a positive electrode and a negative electrode. When the electrical conductivity of the waste measured using the electrode 24 is equal to or higher than a predetermined value, the control unit 22 determines that the waste corresponds to the first waste 51, and controls the sorting unit 30 to include position information and the like. Output a signal. On the other hand, when the conductivity of the waste measured using the electrode 24 is less than the predetermined value, the waste is determined to correspond to the second waste 52, and the control unit 22 does not output the control signal to the separation unit 30. . Thus, the control signal is output to the sorting section 30 only when the conductivity is equal to or higher than the predetermined value.

A control signal including position information of the first waste 51 and the like is input from the conductivity measuring section 20 to the control section 32 that controls the robot arm 34 of the sorting section 30 . The control section 32 controls the robot arm 34 based on the control signal from the conductivity measurement section 20 . The robot arm 34 grabs the first waste 51 and lifts it off the conveyor 36 . Thus, the robotic arm 34 retrieves the first waste 51 from the waste group 50 . The robot arm 34 moves to the right in FIG. As a result, the first waste 51 is stored in the first storage portion 61 .

On the other hand, the second waste 52 is conveyed by the conveyor 36 without being taken out by the sorting section 30 and is stored in the second storage section 62 installed downstream of the conveyor 36 . In this manner, the wastes contained in the waste group 50 are separated into the first wastes 51 whose electrical conductivity is equal to or higher than the predetermined value and the second wastes 52 whose electrical conductivity is less than the predetermined value. Carbon fiber has a higher electrical conductivity than waste components such as plastic, rubber, and waste paper. The material 51 has a higher carbon fiber content.

The second waste 52 may contain carbon fibers. By comparing the entire first waste 51 accommodated in the first accommodating portion 61 and the entire second waste 52 accommodated in the second accommodating portion 62, the entire first waste 51 is second discarded. If the carbon fiber content is higher than the entire object 52, the sorting device 100 contributes to the smooth disposal of the waste containing carbon fiber.

By sorting the waste group 50, the sorting device 100 can facilitate disposal of waste containing carbon fibers. For this reason, it is possible to perform appropriate treatment according to the components contained in the waste after sorting. Since the waste group 50 is sorted by using the conveyor 36 and the robot arm 34 based on the measurement result of the conductivity of the waste, the waste group can be easily sorted without crushing the waste into smaller sizes. can do. In this manner, the sorting device 100 enables smooth disposal of waste containing carbon fibers.

In this example, the robot arm 34 of the sorting section 30 grips and lifts the first waste 51 from the waste group 50, but in a modified example, the conductive The robot arm 34 may grasp and remove the second waste 52 whose rate is less than a predetermined value. In this case, the information acquisition unit 10 allows the first waste 51 having a higher conductivity than the second waste 52, which is not picked up by the robot arm 34, to drop into the container installed downstream of the conveyor 36. will be accommodated. Thus, the robotic arm 34 may sort the waste group 50 by removing the second waste 52 from the waste group 50 . In this modification, the conductivity measuring unit 20 outputs to the sorting unit 30 a control signal including position information and the like of the second waste 52 whose conductivity is less than a predetermined value. The robot arm 34 picks up the second waste 52 from the waste group 50 based on this control signal.

FIG. 2 is a schematic diagram showing another example of a waste sorting apparatus. The sorting apparatus 101 includes an information acquisition unit 10 that acquires positional information of waste from an image of a waste group 50 including a plurality of wastes, and a conductivity measurement unit 20A that measures the conductivity of the waste based on the positional information. and a sorting unit 30A that sorts the waste group 50 into a first waste 51 and a second waste 52 having a lower conductivity than the first waste 51 based on the conductivity measurement result. The sorting device 101 differs from the sorting device 100 in that the conductivity measuring section 20A and the sorting section 30A are integrated. The parts different from the sorting apparatus 100 will be mainly described below.

The conductivity measuring section 20A and the sorting section 30A share the control section 40 . The control unit 40 also has the functions of the control unit 22 and the control unit 33 of the sorting device 100 . The control unit 40 receives the positional information of the waste and the like from the information acquisition unit 10 . The controller 40 is configured to be able to control the positions of the electrodes 24 and the robot arm 34 based on the positional information of the waste.

The electrode 24 of the conductivity measuring section 20A is attached to the tip of the robot arm 34 . The robot arm 34 descends based on a control signal from the control unit 40 to which the positional information of the waste and the like is input, and the electrode 24 comes into contact with the waste. Electrodes 24 measure the conductivity of the waste while in contact with the waste. When the measured value of the electrical conductivity of the waste is equal to or greater than a predetermined value, the control unit 40 determines that the waste corresponds to the first waste 51, and the robot arm 34 continues to descend to the first waste. 51 is grasped and lifted from the conveyor 36 . In this manner, the robotic arm 34 can retrieve the first waste 51 from the waste group 50 .

On the other hand, when the measured value of the electrical conductivity of the waste measured by the electrode 24 is less than the predetermined value, the control unit 40 determines that the waste corresponds to the second waste 52, and grips the second waste 52. The robot arm 34 is raised without moving. Thus, the sorting device 101 can sort the waste group 50 into the first waste 51 and the second waste 52 . In the sorting apparatus 101, since the electrode 24 is attached to the tip of the robot arm 34, the structure of the apparatus can be simplified, and the sorting operation can be simplified. The shape of the electrode 24 is not limited to the illustrated one, and the conductivity of the waste may be measured by using the grasping portion of the robot arm 34 itself as an electrode.

In the modified examples of the sorting devices 100 and 101, the information acquisition unit 10 may determine whether or not image information derived from carbon fibers is present in the image. Image information derived from carbon fibers includes, for example, patterns, shapes, colors, and the like unique to carbon fibers. The position information and the like are output from the information acquisition unit 10 to the conductivity measurement unit 20 (20A) only for the wastes determined by the information acquisition unit 10 to contain or likely to contain carbon fibers.

The conductivity measuring unit 20 (20A) may measure the conductivity of the waste based on this positional information. This allows the conductivity measuring unit 20 (20A) to identify waste containing carbon fibers with a high probability. Then, when the conductivity measured by the conductivity measuring unit 20 (20A) is equal to or higher than a predetermined value, the waste may be determined to correspond to the first waste 51, and the robot arm 34 may take out the waste. Such a method is particularly effective, for example, when sorting the waste group 50 having a low proportion of carbon fiber-containing waste, since the frequency of conductivity measurement can be reduced.

Another modification of the sorting apparatus 100, 101 may comprise a drying section for drying a waste group 50 containing a plurality of wastes containing carbon fibers. By providing the drying section, even if the waste group to be sorted is wet, the accuracy of measuring the conductivity of the waste can be improved. A drying section is provided so that the waste can be dried before the conductivity is measured. For example, it may be provided on the upstream side of a conveying section such as a conveyor. If a portion of the waste group 50 is wet, only a portion of the waste group 50 may be dried in the dryer while the other portion of the waste group bypasses the dryer. The drying temperature of the waste group 50 in the drying section is, for example, 45°C to 95°C.

The heat source of the drying section is not particularly limited, and waste heat generated from various kilns or power generation facilities in cement clinker manufacturing equipment may be used. By utilizing waste heat, the fuel cost required for drying the waste group 50 can be reduced.

A waste treatment system according to one embodiment includes a sorting device and a post-treatment section for acid-treating or heat-treating at least a portion of a first waste. The post-treatment section may include an acid treatment section that treats the first waste with an acid and a heat treatment section that heat-treats the second waste. The sorting device provided in the waste treatment system may be one of the sorting devices 100 and 101 described above, or may be a modification thereof. The acid treatment section may be a tank that dissolves the resin component contained in the waste with acid. The treatment system may comprise a filtration section for separating solids containing carbon fibers from the slurry obtained in the acid treatment section. The heat treatment unit may be a heating furnace that consumes waste as fuel, a kiln that processes waste, or a carbonization furnace that carbonizes waste.

FIG. 3 is a schematic diagram showing an example of a waste disposal system. The treatment system 200 includes a waste crushing device 80, a separation device 100, an acid treatment section 71 for acid-treating the first waste 51, a filtration section 75 for filtering the slurry obtained by the acid treatment, and a second and a heat treatment unit 72 that heats the waste 52 .

The crushing device 80 crushes the waste containing carbon fibers to a predetermined size or less. Since the processing system 200 includes the sorting device 100, the waste can be processed smoothly. Although the crushing device 80 is provided in this example, the crushing device may not be provided in another example.

The waste crushed by the crushing device 80 is introduced into the sorting device 100 . In the sorting device 100, the waste introduced into the sorting device 100 is sorted into a first waste containing carbon fibers and a second waste containing a lower carbon fiber content than the first carbon substances. The first waste stored in the first storage section 61 is introduced into the acid treatment section 71 . The acid treatment unit 71 has a tank, and brings the first waste into contact with the acid to dissolve the resin component and the like contained in the first waste. Sulfuric acid or the like can be used as the acid. At the time of acid treatment, electrolysis treatment may be performed as necessary to promote decomposition of the resin.

In the acid treatment section 71, the resin component is dissolved to obtain a slurry containing carbon fibers as a solid content. This slurry is introduced into a filtering section 75 comprising a filter, for example. Filtration section 75 may be a filter press. The slurry is separated into a carbon fiber residue and a resin-rich portion as a liquid portion in the filtering section 75 . The carbon fiber residue may be reused as carbon fiber, or may be introduced into a carbonization furnace and steamed in a reducing atmosphere to be carbonized fuel. The carbonized fuel may be used as raw fuel for cement, or may be used as fuel for burner combustion or calcining furnace. The resin-rich portion may be burned, for example, in front of a calcining furnace or a kiln of a cement clinker manufacturing apparatus.

The second waste stored in the second storage section 62 is introduced into the heat processing section 72 . The heat processing section 72 may include, for example, at least one of a heating furnace, a carbonization furnace, and a kiln. In the heating furnace, the second waste may be burned under an oxidizing atmosphere into a carbonized residue. In the carbonization furnace, the second waste may be steamed in a reducing atmosphere to obtain carbonized fuel. The carbonized residue and carbonized fuel thus obtained may be used as raw fuel for cement, or as fuel for burner combustion or calcining furnace. Exhaust heat from the heating furnace may be recovered in the kiln of the cement clinker manufacturing apparatus. The second waste may be burned in front of the kiln.

The processing system 200 can facilitate disposal of waste by sorting waste containing carbon fibers with the sorting device 100 . Moreover, effective utilization of waste can be achieved. The processing system 200 may include a sorting device 101 instead of the sorting device 100 in a modified example. These modifications can also facilitate waste disposal.

An example of a waste sorting method can be implemented using the sorting apparatus 100 of FIG. The sorting method of this example includes an information acquisition step of acquiring position information and the like of waste from an image of a waste group 50 including a plurality of wastes containing carbon fibers, and A conductivity measurement step of measuring the conductivity, and the waste group 50 is divided into a first waste 51 and a second waste 52 having a lower conductivity than the first waste 51 based on the conductivity measurement result. and a sorting step.

In the information acquisition step, positional information and the like are acquired from the image of the waste group 50 conveyed on the conveyor 36 from the left side to the right side in FIG. In the conductivity measurement step, the conductivity of the waste is measured by the conductivity measuring unit 20 based on the positional information and the like. If the waste whose conductivity is equal to or higher than a predetermined value is detected in the conductivity measurement process, it is determined to correspond to the first waste 51 .

In the sorting process, the first waste 51 identified based on the position information and shape information is gripped by the robot arm 34 and lifted from the conveyor 36 . Robotic arm 34 thus removes first waste 51 from waste group 50 . The first waste 51 is stored in the first storage section 61 by the robot arm 34 .

On the other hand, the waste whose conductivity is equal to or less than the predetermined value in the conductivity measuring unit 20 is conveyed by the conveyor 36 and is stored as the second waste 52 in the second storage unit 62 installed on the downstream side of the conveyor 36. be. Thus, the waste contained in the waste group 50 is separated into at least the first waste 51 and the second waste 52 .

In a modification of the classification method described above, the information acquisition unit 10 may determine whether or not there is image information derived from carbon fibers in the image. Image information derived from carbon fibers includes, for example, patterns, shapes, colors, and the like unique to carbon fibers. The position information and shape information are output only for the waste that contains or is likely to contain carbon fiber. Then, the electrical conductivity of the waste may be measured based on this information. As a result, the conductivity measuring unit 20 can identify waste containing carbon fibers with a high probability. Then, when the conductivity measured by the conductivity measuring unit 20 is equal to or higher than a predetermined value, the waste may be determined to correspond to the first waste 51 and may be taken out by the robot arm 34 . Such a method is particularly effective, for example, when sorting the waste group 50 having a low proportion of carbon fiber-containing waste, since the frequency of conductivity measurement can be reduced.

In a modification of the sorting method described above, sorting device 101 may be used instead of sorting device 100 . According to the separation methods of the above examples and modifications, the waste containing carbon fiber specified based on the positional information is separated into the first waste 51 and the second waste 52 according to the conductivity, and then The processing procedures can be different from each other. Thereby, it becomes possible to perform a treatment suitable for each contained component. Therefore, it is possible to smoothly dispose of waste containing carbon fibers and to effectively utilize resources.

In another modification of the above sorting method, a drying step of heating the waste group to reduce the moisture contained in the waste group is added before the information acquisition step or between the information acquisition step and the conductivity measurement step. you can go As a result, variations in conductivity due to moisture can be suppressed, and wastes can be separated with higher accuracy. The heating temperature of the waste group is, for example, 45-95°C.

An example of a waste disposal method can be implemented using the disposal system 200 of FIG. The waste disposal method of this example has an acid treatment step of acid-treating the first waste and a heat treatment step of heat-treating the second waste after the separation step described above.

In the acid treatment step, the first waste 51 is brought into contact with an acid to dissolve the resin component and the like contained in the first waste 51 . Sulfuric acid or the like can be used as the acid. If necessary, electrolysis treatment may be performed to promote decomposition of the resin. In the acid treatment step, the resin component is dissolved, and a slurry containing mainly carbon fibers as a solid content is obtained. A filtration step may be performed to separate this slurry. In the filtration step, the slurry is separated into a carbon fiber residue and a resin-rich portion. The carbon fiber residue and resin-rich portion can be treated in a manner similar to that described for treatment system 200 .

In the heat treatment step, the second waste may be heated and burned in a heating furnace or kiln, or may be carbonized in a carbonization furnace. In the heating furnace, the second waste may be burned under an oxidizing atmosphere into a carbonized residue. In the carbonization furnace, the second waste may be steamed in a reducing atmosphere to obtain carbonized fuel. The carbonized residue and carbonized fuel thus obtained can be treated in a manner similar to that described for treatment system 200 .

In the waste disposal method of this example, the waste group 50 is separated into the first waste 51 and the second waste 52 based on the conductivity measurement result. Different post-treatments are then applied to the separated first waste and second waste. In this way, the first waste and the second waste are separated by a simple method and subjected to separate post-treatments, so that the waste containing carbon fibers can be smoothly treated.

Although several embodiments have been described above, the present invention is not limited to the above embodiments. For example, the conductivity measurement unit may measure electrical resistivity instead of conductivity.

According to the present disclosure, a waste sorting apparatus and a sorting method are provided that enable smooth processing of waste containing carbon fibers. Also provided is a waste disposal system and disposal method capable of smoothly disposing of carbon fiber-containing waste.

DESCRIPTION OF SYMBOLS 10... Information acquisition part, 20,20A... Conductive measurement part, 30,30A... Sorting part, 22,32,40... Control part, 34... Robot arm, 36... Conveyor, 50... Waste group, 51... First Waste 52 Second waste 61 First storage unit 62 Second storage unit 71 Acid treatment unit 72 Heat treatment unit 75 Filtration unit 80 Crushing device 100, 101 Sorting device, 200 ... processing system.

Claims (8)

an information acquisition unit that acquires position information of the waste from an image of a waste group containing a plurality of wastes containing carbon fibers;
a conductivity measuring unit that directly contacts the waste based on the position information and measures the conductivity of the waste;
a waste sorting unit that sorts the waste group into at least a first waste and a second waste having a lower conductivity than the first waste based on the conductivity measurement result. sorting equipment. 2. The waste sorting apparatus according to claim 1, wherein the sorting unit comprises a robot arm configured to be able to grip the waste. 3. The waste sorting apparatus according to claim 2, wherein the robot arm is attached with the electrodes of the conductivity measuring unit. The sorting apparatus according to any one of claims 1 to 3, wherein the information acquisition unit acquires the shape information of the waste together with the position information of the waste from the image. The information acquisition unit acquires image information derived from the carbon fiber from the image,
The sorting apparatus according to any one of claims 1 to 4, wherein the conductivity measuring unit measures the conductivity of the waste based on the position information and the image information. A waste treatment system, comprising: the sorting apparatus according to any one of claims 1 to 5; and a post-treatment section that acid-treats or heat-treats at least part of the first waste. Acquiring location information of the waste from an image of a waste group including a plurality of wastes containing carbon fibers;
measuring the conductivity of the waste by directly contacting the waste with an electrode based on the position information;
sorting the waste group into at least a first waste and a second waste having a lower conductivity than the first waste based on the conductivity measurement. Method. Acquiring location information of the waste from an image of a waste group including a plurality of wastes containing carbon fibers;
measuring the conductivity of the waste by directly contacting the waste with an electrode based on the position information;
sorting the waste group into at least a first waste and a second waste having a lower conductivity than the first waste based on the result of the conductivity measurement; and
A method of treating waste, comprising subjecting at least part of the first waste to acid treatment or heat treatment.

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