JP7169116B2 - 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 device according to one aspect of the present disclosure includes a conductivity detection unit that detects the conductivity of a waste group including a plurality of wastes containing carbon fibers, and a waste based on the conductivity detection result. a sorting section for sorting the group of materials into at least a first waste and a second waste having a lower electrical conductivity than the first waste.

The sorting apparatus includes a conductivity detector that detects the conductivity of the waste group. Since the carbon fiber has conductivity, the conductivity detection unit can detect the carbon fiber. The sorting unit sorts the waste group into at least first waste with high conductivity and second waste with lower conductivity than the first waste, based on the conductivity detection result by the conductivity detection unit. do. Since carbon fibers generally have a higher electrical conductivity than waste components such as plastics, rubber, and waste paper, waste containing carbon fibers is efficiently separated from waste containing such waste components. be able to. 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. Since the first waste and the second waste portion are separated based on the result of detection 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 section may include at least one selected from a robot arm configured to grip the waste, and a gas ejector and a gas suction device configured to change the falling trajectory of the waste. Since the sorting section is provided with a robot arm, the first waste can be easily sorted without crushing the waste into smaller sizes. The first waste can be easily separated even if the size of the waste is small by providing the separation unit with the gas discharger or the gas suction device.

The sorting device has an image information acquisition unit that acquires an image of the waste group and acquires from the image position information and/or shape information of at least one of the first waste and the second waste that are sorted by the sorting unit. may be provided. By providing such an image information acquisition unit, it is possible to efficiently sort the waste group based on the detection result of the conductivity detection unit.

The image information acquiring unit may acquire image information derived from the carbon fibers based on the image, and the sorting unit may sort the waste group based on the conductivity detection result and the image information. Waste having a conductivity equal to or higher than carbon fiber can be separated from the first waste. Therefore, sorting can be performed with higher precision.

The conductivity detector may detect the conductivity of the waste group using electromagnetic induction. As a result, it is possible to efficiently sort the waste with a simple device configuration.

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 detecting the conductivity of a waste group including a plurality of wastes containing carbon fibers, and based on the conductivity detection result, the waste group into at least a first waste and a second waste having a lower electrical conductivity than the first waste.

In the sorting method described above, the conductivity of the waste group is detected. Since the carbon fiber has conductivity, the waste group is separated into at least the first waste and the second waste based on the conductivity detection result. Since carbon fibers generally have a higher electrical conductivity than waste components such as plastics, rubber, and waste paper, waste containing carbon fibers is efficiently separated from waste containing such waste components. be able to. 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 result of detection of conductivity, the waste can be easily separated. Therefore, this sorting method makes it possible to smoothly treat waste containing carbon fibers.

A waste disposal method according to one aspect of the present disclosure includes detecting conductivity of a waste group including a plurality of wastes containing carbon fibers, and determining the waste group at least based on the conductivity detection result. 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 separates a group of wastes into at least a first waste and a second waste having lower conductivity based on the result of detection of conductivity. Since carbon fibers are generally more conductive than waste components such as plastics, rubber, paper waste, etc., for waste groups containing these waste components, all or most of the carbon fibers are in primary waste. separated into objects. 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. FIG. 3 is a schematic diagram showing still another example of a waste sorting device; 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 a conductivity detection unit that detects the conductivity of a waste group including a plurality of wastes containing carbon fibers, and a waste group based on the conductivity detection result. into a first waste having electrical conductivity and a second waste having lower electrical conductivity than the first waste. 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 detector provided on or near the transport path of the waste group may or may not come into contact with the waste when detecting 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 sorting device acquires an image of the waste whose conductivity has been detected, and an image information acquisition unit that specifies the position or shape of at least one of the first waste and the second waste separated by the sorting unit from the image. may be provided. The image information acquisition unit may include a camera, and may capture a visible light image of the surface of each waste contained in the waste group with the camera. The image may be a moving image or a still 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, it is possible to detect the first waste containing carbon fiber contained in the waste group by using the characteristic shape, pattern, and color derived from the carbon fiber from the captured image. Therefore, by combining the conductivity detection result and the image information captured by the image information acquisition unit, the presence or absence, size, or content of carbon fiber contained in the waste can be determined, and the waste group can be separated. good. The image information acquisition unit may acquire an X-ray image of the interior of the waste, or may acquire an image using a nuclear magnetic resonance phenomenon. In this way, the surface structure and internal structure of the waste may be imaged and a plurality of types of images may be combined.

FIG. 1 is a schematic diagram showing an example of the waste sorting apparatus of the present embodiment. The sorting apparatus 100 includes a conductivity detection unit 10 that detects the conductivity of each of a plurality of wastes contained in a waste group, and image information that acquires an image of the waste group 50 based on the conductivity detection results. It comprises an acquisition unit 20 and a separation unit 30 for separating a group of wastes 50 into a first waste 51 and a second waste 52 having a lower conductivity than the first waste 51 .

A waste group 50 containing a plurality of wastes is fed onto the conveyor 36 (left side in FIG. 1) of the sorting section 30 of the sorting apparatus 100 . A waste group 50 supplied onto the conveyor 36 is conveyed by the conveyor 36 from left to right in FIG.

Inside the conveyor 36, a conductivity detector 10 for detecting the conductivity of the waste flowing on the conveyor 36 is provided. A method of detecting conductivity by the conductivity detection unit 10 may use electromagnetic induction. The conductivity detector 10 detects the first waste 51 whose conductivity is higher than a predetermined value. When the first waste 51 is detected by the conductivity detection unit 10 , a detection signal is output to the image information acquisition unit 20 .

The image information acquisition unit 20 has a camera that captures an image of the waste group 50 . When the detection signal from the conductivity detection unit 10 is input, the image information acquisition unit 20 captures an image of the first waste 51 and acquires the position information and shape information of the first waste 51 . The image information acquisition section 20 outputs the position information and shape information of the first waste 51 to the control section 32 of the sorting section 30 .

The image information acquisition unit 20 may be configured to detect 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. Waste containing patterns, shapes, or colors derived from carbon fibers is detected as the first waste 51 . The image information acquisition unit 20 may determine only the waste containing image information derived from carbon fibers among the wastes to which the detection signal is input from the conductivity detection unit 10 as the first waste 51 . Then, the image information acquisition unit 20 outputs the position information and shape information of the first waste 51 determined to contain information derived from carbon fibers to the control unit 32 of the sorting unit 30 . As a result, it is possible to prevent the first waste 51 from being mixed with waste that does not contain carbon fibers and that contains metal. Among the first wastes 51 , wastes determined not to contain information derived from carbon fibers may be sorted as third wastes by the sorting unit 30 .

The position information and shape information of the first waste 51 are input from the image information acquisition unit 20 to the control unit 32 that controls the robot arm 34 of the sorting unit 30 . The control unit 32 controls the robot arm 34 based on the position information and shape information of the first waste 51 from the image information acquisition unit 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 that was not detected by the conductivity detection unit 10 (the conductivity was less than the predetermined value) was transported by the conveyor 36 and are housed in 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 based on the detection result of the conductive detection unit 10 and the robot arm 34 is used, the waste group can be easily sorted without crushing the waste into smaller sizes. can be done. 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 grasps and lifts the first waste 51 from the waste group 50, but in the modified example, the first waste 51 is picked up from the waste group 50 placed on the conveyor 36. 2 Waste 52 may be grasped and removed by robotic arm 34 . In this case, the first waste 51, which has higher conductivity than the second waste 52 and is not picked up by the robot arm 34, falls and is stored in the storage unit installed downstream of the conveyor 36. . 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 detection unit 10 detects the first waste 51 whose conductivity is equal to or higher than a predetermined value, and based on this detection result, the image information acquisition unit 20 detects the second waste other than the first waste. The position information and shape information of the object 52 are acquired, and these information are input to the control section 32 . In yet another modification, without providing the image information acquisition unit 20, the operator grasps the detection result of the conductivity detection unit 10, and based on the detection result, the first waste 51 or the second waste 52 The waste mass 50 may be separated by gripping with the robot arm 34 .

FIG. 2 is a schematic diagram showing another example of a waste sorting apparatus. The sorting device 101 includes a conductivity detection unit 10 that detects the conductivity of a waste group 50 including a plurality of wastes containing carbon fibers, and a first waste 51 having a conductivity greater than or equal to a predetermined value. and a sorting unit 30 for sorting second waste 52 that is less than a predetermined value.

The sorting apparatus 101 differs from the sorting apparatus 100 in that it has a gas discharger 35 instead of the control unit 32 and the robot arm 34 and does not include the image information acquisition unit 20 . The parts different from the sorting apparatus 100 will be mainly described below. The gas ejector 35 is arranged below the conveyor 36 on the downstream side, and is configured to be capable of ejecting the gas G to the waste that is transported by the conveyor 36 and dropped from the outlet of the conveyor 36 . The discharge amount and wind speed of the gas G are not particularly limited as long as the falling trajectory of the waste can be changed.

The conductivity detector 10 detects the first waste 51 contained in the waste group 50 based on the conductivity value. When the conductivity detector 10 detects the first waste 51 , it outputs a detection signal to the gas discharger 35 . Upon receiving the detection signal, the gas ejector 35 ejects the gas G toward the first waste 51 dropping from the exit of the conveyor 36 . As a result, the falling trajectory of the first waste 51 changes to a trajectory along the arrow A direction. In this way, the first waste 51 falls into the first container 61 which is located away from the outlet of the conveyor 36 . The time lag between the detection of the first waste 51 by the conductivity detection unit 10 and the discharge of the gas G by the gas discharger 35 depends on the conveying speed of the conveyor 36 and the speed of the conductivity detection unit 10 and the gas discharger 35 . It is appropriately adjusted depending on the positional relationship.

On the other hand, the second waste 52 falls downward from the outlet of the conveyor 36 without being sprayed with the gas G from the gas discharger 35 . The second wastes 52 fall into the second container 62 arranged closer to the conveyor 36 than the first container 61 . In this way, the wastes contained in the waste group 50 are sorted into the first waste 51 and the second waste 52 having different electrical conductivity.

The sorting by the sorting device 101 is based on the result of detection of electrical conductivity, and the gas discharger 35 is used. Therefore, even if the waste is crushed to a small size, the waste can be easily sorted. Therefore, the sorting device 101 enables smooth disposal of waste containing carbon fibers.

FIG. 3 is a schematic diagram showing still another example of the waste sorting device. The sorting device 102 includes a conductivity detection unit 10 that detects the conductivity of a waste group 50 that includes a plurality of wastes containing carbon fibers, and a first waste 51 that has a conductivity greater than or equal to a predetermined value. and a sorting unit 30 for sorting second waste 52 that is less than a predetermined value.

The sorting device 102 differs from the sorting device 101 in that the conductivity detection unit 10 detects the conductivity of the waste group 50 falling downward. The parts different from the sorting apparatus 101 will be mainly described below. The gas discharger 35 is arranged below the conductivity detection unit 10 and near the path along which the waste group 50 falls, and the conductivity is detected by the conductivity detection unit 10 by discharging the gas G. It is configured so that the falling trajectory of waste can be changed. The discharge amount and wind speed of the gas G from the gas discharger 35 are not particularly limited as long as the falling trajectory of the waste can be changed.

The conductivity detector 10 outputs a detection signal to the gas discharger 35 when it detects the passage of the first waste 51 whose conductivity is equal to or higher than a predetermined value. Upon receiving the detection signal, the gas ejector 35 ejects the gas G toward the first waste 51 falling vertically downward. As a result, the falling trajectory of the first waste 51 changes to a trajectory along the arrow A direction. In this way, the first waste 51 falls into the first container 61 which is located away from the gas ejector 35 .

On the other hand, the second waste 52 falls vertically downward without being blown by the gas from the gas discharger 35 . The second waste 52 falls into the second storage portion 62 arranged closer to the gas discharger 35 than the first storage portion 61 . In this way, the waste contained in the waste group 50 is separated into first waste 51 and second waste 52 .

The sorting by the sorting device 102 is based on the conductivity detected by the conductivity detector 10, and the gas discharger 35 is used, so that the waste can be easily sorted even if the waste is crushed to a small size. be able to. Thus, the sorting device 102 facilitates the disposal of waste containing carbon fibers.

A variant of the sorting devices 101 and 102 may comprise a gas aspirator instead of the gas dispenser 35 . A gas aspirator can be used to change the falling trajectory of the first waste 51 . Also, in another modification, the gas ejector 35 may eject gas only to the second waste 52 . As a result, the falling trajectory of the second waste 52 is changed, and the first waste 51 and the second waste 52 can be separated. In yet another modification, the gas dispenser 35 and the gas aspirator may be combined. For example, the gas is discharged from the gas discharger 35 toward the first waste 51, the gas is sucked with the gas suction device for the second waste 52, and both the first waste 51 and the second waste 52 are discharged. You can change the falling trajectory of As a result, it is possible to greatly change the falling trajectory of both, so that the first waste 51 and the second waste 52 can be separated with higher accuracy.

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 any of the sorting devices 100, 101, and 102 described above, or any of their modifications. 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. 4 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 modification may not be provided with the crushing device.

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 first waste containing carbon fibers and second waste having a lower volume ratio of carbon fibers 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. In a modification, the processing system 200 may be provided with the sorting device 101 or the sorting device 102 instead of the sorting device 100 . 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 separation method of this example includes a conductivity detection step of detecting the conductivity of a waste group including a plurality of wastes containing carbon fibers, and image information acquisition of acquiring image information of the waste whose conductivity is detected. and a sorting step for sorting the waste group into first waste and second waste 52 having a lower conductivity than the first waste.

In the conductivity detection step, the conductivity detection unit 10 detects the conductivity of the waste group 50 conveyed on the conveyor 36 from the left side to the right side in FIG. A detection signal is output to the image information acquisition unit 20 when waste having a conductivity equal to or higher than a predetermined value is detected in the conductivity detection step. The image information acquisition unit 20 outputs position information and shape information of the waste whose conductivity is detected in the conductivity detection step. At this time, based on the image obtained by the image information acquisition unit 20, it may be determined whether or not the information (pattern, shape or color) derived from the carbon fiber is included. In this case, positional information and shape information are output for the waste whose conductivity is equal to or higher than a predetermined value in the conductivity detection step and which includes a pattern, shape, or color derived from carbon fiber.

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 not detected by the conductivity detection unit 10 is conveyed by the conveyor 36 and stored as the second waste 52 in the second storage unit 62 installed on the downstream side of the conveyor 36 . Thus, the waste contained in the waste group 50 is separated into at least the first waste 51 and the second waste 52 . It should be noted that, based on the image of the image information acquisition unit 20, the waste determined not to contain information derived from carbon fiber may be sorted into the second storage unit 62 together with the second waste 52. , may be sorted as the third waste in a separately provided third container.

In a modification of the above sorting method, sorting device 101 or 102 may be used instead of sorting device 100 . According to the separation methods of the above examples and modifications, the waste containing carbon fibers is separated into the first waste 51 and the second waste 52 according to their electrical conductivity, and the subsequent treatment procedures are made different from each other. be able to. 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.

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 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 detection 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.

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... Conductive detection part, 20... Image information acquisition part, 30... Sorting part, 32... Control part, 34... Robot arm, 35... Gas discharger, 36... Conveyor, 50... Waste group, 51... First disposal Material 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, 102 ... sorting device, 200 ... treatment system.

Claims (7)

a conductivity detection unit that detects the conductivity of a waste group containing a plurality of wastes containing carbon fibers;
an image information acquisition unit that acquires an image of the waste group and acquires image information derived from the carbon fiber based on the image;
Based on the conductivity detection result and the image information , the waste group is divided into at least a first waste and a second waste having a lower carbon fiber content and lower conductivity than the first waste. A waste sorting device, comprising: a sorting unit that sorts. The sorting unit comprises at least one selected from a robot arm configured to be able to grip the waste, and a gas ejector and a gas suction device configured to be able to change the falling trajectory of the waste. Item 1. The waste sorting apparatus according to item 1. 3. The image information acquisition unit acquires position information and/or shape information of at least one of the first waste and the second waste separated by the separation unit from the image. The waste sorting device according to . The waste sorting apparatus according to any one of claims 1 to 3 , wherein the conductivity detection unit uses electromagnetic induction to detect the conductivity of the waste group. A waste treatment system, comprising: the sorting device according to any one of claims 1 to 4 ; and a post-treatment section that acid-treats or heat-treats at least part of the first waste. sensing the electrical conductivity of a waste mass comprising a plurality of wastes containing carbon fibers ;
obtaining an image of the waste group, and obtaining image information derived from the carbon fiber based on the image; and
Based on the conductivity detection result and the image information , the waste group is divided into at least a first waste and a second waste having a lower carbon fiber content and lower conductivity than the first waste. A method for sorting waste, comprising sorting. sensing the electrical conductivity of a waste mass comprising a plurality of wastes containing carbon fibers;
Acquiring an image of the waste group, and acquiring image information derived from the carbon fiber based on the image;
Based on the conductivity detection result and the image information , the waste group is divided into at least a first waste and a second waste having a lower carbon fiber content and lower conductivity than the first waste. sorting; 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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