JP2023155229A - Sorting and treating system, and sorting and treating method - Google Patents

Abstract

To effectively prevent breakage of a container due to foreign metals contaminating a stored object.SOLUTION: A system is assembled with a carrying-in part 11 for accommodating and carrying in a container 2 containing at least a bulk polluted soil as a stored object; a detection apparatus 14 for detecting whether or not the stored object is contaminated with foreign metals; a bag breaking apparatus 17 for breaking a container 2A where foreign metals are not detected and taking out the stored object; a bypass treatment part 40 for bypassing a container 2B where foreign metals are detected from the bag breaking apparatus 17 and taking out the stored object while removing foreign metals; and a primary sorting apparatus 22 for sorting the stored object taken out by the bag breaking apparatus 17 and/or the stored object which has been bypassed from the bag breaking apparatus 17 by the bypass treatment part 40 and from which foreign metals have been removed to a first bulk polluted soil of a desired first size or under and a block object larger than the first size.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a sorting system and a sorting method, and particularly relates to a technique suitable for sorting contaminated soil.

For example, Patent Document 1 discloses a method for separating and storing contaminated soil generated from decontamination work of radioactive substances. According to this document, contaminated soil is stored in, for example, a flexible container bag (hereinafter simply referred to as a container) and transported to an intermediate storage facility. The contaminated soil contained in the container is taken out by putting the container into a bag-breaking device, and after being subjected to sorting treatment, etc., it is transported to a transit stockyard.

Japanese Patent Application Publication No. 2016-128804

Here, in addition to contaminated soil, the contents of the containers carried into the intermediate storage facility may include hard foreign objects (hereinafter referred to as metal foreign objects) such as gas cylinders and reinforcing rods. In particular, when a large amount of contaminated soil is to be separated and processed, it becomes difficult to appropriately check the contents of the container, and the container may be directly thrown into the bag-breaking device without checking the contents. For this reason, if metal foreign matter is contained in the contents of the container, there is a problem that the bag-breaking device, the subsequent belt conveyor, etc. may be damaged, and the treatment of contaminated soil may be stopped.

The technology of the present disclosure has been made in view of the above circumstances, and aims to effectively prevent damage caused by foreign metal objects mixed into the contents of a container.

The sorting system of the present disclosure includes a carrying means that receives and carries in a container containing at least lumpy contaminated soil as a contained object, and a detection device that detects whether or not metallic foreign matter is mixed in the carried object in the container. means, a bag-breaking means for tearing a container in which a metal foreign object is not detected by the detection means and taking out the contents from the container, and a container in which a metal foreign object is detected by the detection means to bypass the bag-breaking means. a detour processing means for taking out the contents from the container and removing metal foreign objects from the taken out contents; and a first sorting means for separating the contained material from which metal foreign matter has been removed into first lumpy contaminated soil of a predetermined first size or less and lumps larger than the first size. shall be. Furthermore, it is preferable that the bag-breaking means tear open containers in which metal foreign matter has not been detected by the detection means, take out contents from the containers, and separate concrete lumps from the taken-out contents.

Further, the lumps separated by the first sorting means are sorted into combustibles, non-combustibles, and second lumps of contaminated soil of a predetermined second size or less smaller than the first size, and Preferably, the method further includes a sorting means for reinjecting the second lumpy contaminated soil into the first sorting means.

Further, an obtaining means for obtaining an index value of moisture contained in the first lumpy contaminated soil separated by the first sorting means, and reforming the soil into the first lumpy contaminated soil based on the obtained index value. a mixing means for generating treated soil by crushing the first lumpy contaminated soil to which the reforming material has been added and mixing it with the reforming material; a second sorting means for sorting the treated soil generated by the method into first treated soil of a predetermined third size or less, which is smaller than the first size, and second treated soil, which is larger than the third size. It is preferable to further provide.

Further, it is preferable that the mixing means includes a crushing and mixing means for mixing the contaminated soil with the modifying material while crushing it, and an agitating and mixing means for stirring and mixing the contaminated soil with the modifying material.

Further, a conveying means for conveying the first treated soil separated by the second sorting means; an intermediate storage means for receiving and temporarily storing the first treated soil conveyed by the conveying means; It is preferable to further include a reflux means for refluxing the first treated soil transported by the transport means to the transport means according to the amount of treated soil that can be received by the intermediate storage means.

The method further includes a landfill status acquisition unit that acquires the status of a landfill that can receive the first treated soil carried out from the intermediate storage unit, and the reflux unit is configured to collect the first treated soil transported by the conveyance unit. It is preferable that the treated soil is returned to the conveyance means according to the landfill status acquired by the landfill status acquisition unit.

The separation processing method of the present disclosure includes a carrying-in step of receiving and carrying in a container containing at least lumpy contaminated soil as a contained object, and a detection step of detecting whether or not metallic foreign matter is mixed in the carried-in contents in the container. a bag-breaking step of tearing a container in which no metallic foreign matter has been detected using a bag-breaking means and taking out the contents from the container; and diverting a container in which a metallic foreign matter has been detected from the bag-breaking means. a detour processing step for taking out the contents from the container and removing metal foreign objects from the taken out contents; The present invention is characterized by comprising a sorting step of separating the contained material from which metal foreign matter has been removed into first lumpy contaminated soil of a predetermined first size or less and lumps larger than the first size.

According to the technology of the present disclosure, it is possible to effectively prevent damage caused by foreign metal objects mixed into the contents of the container.

1 is a schematic overall configuration diagram showing a separation processing system according to the present embodiment. FIG. 2 is a schematic block diagram showing a primary sorting section according to the present embodiment. FIG. 2 is a schematic block diagram showing a secondary sorting section according to the present embodiment. FIG. 2 is a schematic block diagram showing a treated soil transport unit and a treated soil relay yard according to the present embodiment. It is a flowchart figure explaining the classification process of contaminated soil based on this embodiment.

Hereinafter, a sorting system and a sorting method according to the present embodiment will be explained based on the accompanying drawings. Identical parts are given the same reference numerals, and their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

[overall structure]
FIG. 1 is a schematic overall configuration diagram showing a sorting system 1 according to this embodiment.

The separation processing system 1 is used, for example, in an intermediate storage facility for radioactively contaminated soil. Specifically, as shown in FIG. 1, the sorting system 1 includes a primary sorting section 10, a secondary sorting section 50, a treated soil transport section 90, and a treated soil relay yard 97. In addition, in the figure, the code|symbol 100 has shown the management side terminal device installed in the central monitoring room etc. which manage the sorting system 1. Further, reference numeral 200 indicates a landfill status acquisition unit (a landfill status acquisition unit) that acquires the landfill progress status (for example, the acceptable amount of treated soil) of a receiving side that receives treated soil, such as a landfill site. As the landfill status acquisition unit 200, for example, a camera capable of taking an image of the entire reclaimed land or an aerial photograph using a flying object such as a drone can be used. In addition, to determine the progress of the landfill, the acceptable capacity (initial capacity) of the landfill is memorized in advance, and the amount of treated soil carried out from the treated soil relay yard 97 to the landfill by dump trucks, etc. (accumulated value) is subtracted. It may also be obtained by The amount of treated soil carried out from the treated soil relay yard 97 may be calculated based on the number of dump trucks and weight data measured with a load meter or the like. In this case, the landfill status acquisition unit 200 may be provided not on the landfill side but on the sorting system 1 side. In addition, the progress of reclamation can be estimated by receiving location information (e.g., height information) of heavy equipment vehicles from GPS (Global Positioning System) devices installed on heavy equipment vehicles such as bulldozers working on the reclaimed land. You may.

The management terminal device 100 and the landfill status acquisition unit 200 are connected to each other so as to be able to communicate wirelessly via a network N such as a mobile phone line. The operating status of the separation processing system 1 (processing speed of contaminated soil and storage amount of treated soil) is appropriately controlled according to the landfill progress status transmitted in real time from the landfill status acquisition unit 200 to the management terminal device 100. It looks like this. Note that communication between the management terminal device 100 and the landfill status acquisition unit 200 may be wireless or wired.

[Primary sorting section]
FIG. 2 is a schematic block diagram showing the primary sorting section 10 according to this embodiment.

As shown in FIG. 2, the primary sorting section 10 includes a receiving and carrying section (carrying means) 11, a bag-breaking section (bag-breaking means) 15, a primary sorting section (first sorting means) 20, and a sorting section. A bypass processing section (selection means) 30 and a bypass processing section (detour processing means) 40 are provided.

The reception carry-in section 11 includes, in order from the upstream side, a plurality of reception belt conveyors 12A, 12B, 12C, an alignment belt conveyor 13, and a metal detection device (detection means) 14.

The receiving belt conveyors 12A, 12B, and 12C are arranged substantially parallel to each other, and receive containers 2 containing contaminated soil and the like from the truck T. Specifically, the receiving belt conveyors 12A, 12B, and 12C receive the containers 2 dropped from the loading platform by the dumping of the truck T, and convey the received containers 2 to the alignment belt conveyor 13 on the downstream side.

Note that the number of receiving belt conveyors 12A, 12B, and 12C is not limited to three as shown in the illustrated example, but may be one, two, or four or more. If a plurality of receiving belt conveyors 12A, 12B, and 12C are provided, containers 2 can be received from a plurality of trucks T at the same time, and the receiving efficiency can be improved. Further, the method of receiving the container 2 is not limited to dumping up the truck T, and the container 2 may be received by being lifted up and lowered by heavy equipment (not shown) or the like.

The alignment belt conveyor 13 conveys the containers 2 introduced from the receiving belt conveyors 12A, 12B, and 12C toward the bag breakage processing section 15 on the downstream side. In this embodiment, the alignment belt conveyor 13 is provided with a position sensor 13A capable of detecting position information of containers 2 that have fallen onto the upper surface of the alignment belt conveyor 13, and an alignment mechanism 13B that automatically aligns the containers 2. ing. The alignment mechanism 13B aligns each container 2 based on the position information transmitted from the position sensor 13A so that the containers 2 dropped from the receiving belt conveyors 12A, 12B, and 12C do not overlap each other on the alignment belt conveyor 13. Automatically arrange sequentially.

The metal detection device 14 is, for example, an electromagnetic induction type or magnetic induction type metal detection device, and is preferably provided on the alignment belt conveyor 13 downstream of the alignment mechanism 13B. The metal detection device 14 detects whether metal foreign matter such as a gas cylinder or a reinforcing rod is mixed in the contents of the container 2 flowing on the alignment belt conveyor 13. Containers 2A in which metal foreign matter has not been detected by the metal detection device 14 are sent to the downstream bag-breaking processing section 15, and containers 2B in which metal foreign matter has been detected by the metal detection device 14 are subjected to bag-breaking processing. The data is not sent to the section 15, but is sent to a bypass processing section 40, which will be described later.

In this way, by sorting the containers 2B in which metal foreign matter has been detected by the metal detection device 14 to the bypass processing section 40, which bypasses the bag-breaking processing section 15, damage to the bag-breaking device 17, which will be described later, can be effectively prevented. It becomes possible to prevent this. In addition, the arrangement position of the metal detection device 14 is not limited to the alignment belt conveyor 13 of the illustrated example, and it is also possible to provide it in each of the receiving belt conveyors 12A, 12B, and 12C. If the metal detection device 14 is provided on the alignment belt conveyor 13, the number of metal detection devices 14 can be reduced to one, and equipment costs can be reduced.

The bag breakage processing unit 15 includes, in order from the upstream side, an input belt conveyor 16 and a bag breakage device 17.

The input belt conveyor 16 inputs the container 2A received from the alignment belt conveyor 13 and containing no metal foreign matter into the bag breaking device 17. The bag tearing device 17 includes at least a pair of rotating drums 18 and 19 in a casing 17A that has an input port on the top and a discharge port on the bottom. The rotating drums 18 and 19 are provided with a rotary cutter (not shown) and the like, and these rotating drums 18 and 19 rotate in opposite directions at different rotational speeds.

That is, the container 2A introduced into the casing 17A from the input port is guided between the rotating drums 18 and 19, and is torn by the rotary cutters or the like of the rotating drums 18 and 19 that rotate in opposite directions to form the container 2A. The contents are taken out from the container. The torn bag pieces of the container 2A and the contents taken out from the container 2A (mainly non-combustible materials such as lumps of contaminated soil and small stones) are removed from the discharge port of the casing 17A, as shown by arrow A1 in the figure. From there, they are dropped downward onto an input belt conveyor 21, which will be described later. On the other hand, if a foreign object such as a large concrete block is included in the stored object, the rotary cutter is rotated in reverse as a force of a certain level or more is applied to the rotary cutter by the foreign object. When the rotary cutter reverses, large foreign matter is discharged from the foreign matter discharge gate as shown by arrow A2 in the figure, and is separated from torn bag pieces, lumps of contaminated soil, and the like.

The primary sorting unit 20 includes an input belt conveyor 21 and a primary sorting device 22 .

The input belt conveyor 21 receives the contents taken out from the container 2A by the bag tearing device 17 and the torn bag pieces of the container 2A torn by the bag tearing device 17, and throws them into the primary sorting device 22.

The primary sorting device 22 is, for example, a cylindrical rotary sorting machine (trommel type sorting machine), and includes a cylindrical rotating drum 23 with a large number of through holes bored in its circumferential surface. An input port 24 is provided at one end of the rotating drum 23, and a discharge port 25 is provided at the other end of the rotating drum 23. The rotating drum 23 is arranged with its axis of rotation obliquely such that the input port 24 is located above the discharge port 25. The primary sorting device 22 is configured such that among the lumps input from the input port 24, the lumps smaller in size than the through holes of the rotating drum 23 fall downward from the rotating drum 23, while the lumps larger in size than the through holes fall downward from the rotating drum 23. The material is configured to be delivered to the outlet 25.

In this embodiment, the diameter of the through hole of the rotating drum 23 is set to about 100 mm (an example of the first size of the present disclosure). That is, small-sized lumps with an outer diameter of 100 mm or less (mainly lumps of contaminated soil) fall downward from the rotating drum 23, as shown by arrow B1 in the figure, and are transferred to the secondary sorting section 50, which will be described later. sent to. On the other hand, lumps with an outer diameter larger than 100 mm (mainly combustible materials such as broken bag pieces of container 2A, and non-flammable objects such as contaminated soil and stones attached to the broken bag pieces) are indicated by arrow B2 in the figure. As shown, the particles fall from the discharge port 25 toward a sorting belt conveyor 31 of a sorting processing section 30, which will be described later.

The sorting processing section 30 includes a sorting belt conveyor 31, a sorting device 32, a compression packing device 33, a transport belt conveyor 34, and an input belt conveyor 35.

The sorting belt conveyor 31 receives the lumps that are larger than 100 mm and is sorted by the primary sorting device 22 and conveys them to the sorting device 32 .

The sorting device 32 sorts the input lumps into non-flammable materials S1 which are relatively heavy in weight, lumps S2 which are small in size (mainly lumps of contaminated soil), and combustible materials S3 which are relatively light in weight. . Specifically, the sorting device 32 includes a housing-like main body 32A having an input port at the top and a discharge port at the bottom, a blower 32B, and a swing plate 32C having a large number of through holes. We are prepared.

The main body 32A and the swing plate 32C housed in the main body 32A are arranged diagonally so that one end is located lower than the other end. The blower 32B is provided in the main body 32A adjacent to the input port, and is provided so as to forcefully send air from one end to the other end in the main body 32A.

The sorting device 32 discharges heavy non-combustible materials S1 (mainly stones, etc.) from one end of the main body 32A (see arrow C1) among the lumps input into the main body 32A from the input port, and Light combustible materials S3 (mainly broken bag pieces of the container 2A, etc.) are discharged from the other end of the main body 32A by the blower 32B (see arrow C2). The sorted combustibles S3 are put into the compression packaging device 33 as shown by arrow C3 in the figure, compressed and packed, and then discharged.

In addition, the sorting device 32 selects relatively small-sized lumps S2 (mainly lumps of contaminated soil separated from broken bag pieces of the container 2A, etc.) among the lumps thrown into the main body 32A from the input port. , by passing through the through-hole of the swing plate 32C. In this embodiment, the diameter of the through hole of the swing plate 32C is set to about 50 mm (an example of the second size of the present disclosure).

That is, the lump S2 having an outer diameter smaller than 50 mm falls downward from the through hole of the swing plate 32C, as shown by the arrow C3 in the figure. The fallen lumps S2 are received by the transport belt conveyor 34, are returned to the input belt conveyor 21 of the primary sorting unit 20 via the input belt conveyor 35, and are then re-injected into the primary sorting device 22. . In this way, by re-feeding the lumpy contaminated soil that has been separated and sorted from heavy and light items by the sorting device 32 into the primary separation processing section 20, the contaminated soil that has adhered to the broken bag pieces of the container 2A can be effectively removed. It becomes possible to process

The bypass processing unit 40 includes a crane device 41, a bypass yard 42, and heavy machinery 43, 44 such as a backhoe or a hydraulic excavator. Note that the number of heavy machines 43 and 44 is not limited to a plurality of machines, and may be one machine.

The crane device 41 lifts up the container 2B in which metal foreign matter has been detected by the metal detection device 14, and transports it to the bypass yard 42. Note that the transportation to the bypass yard 42 is not limited to a crane, and may be carried out by a heavy machine (not shown) or the like. The heavy machinery 43 takes out the contents S4 from the container 2B by tearing the container 2B carried into the bypass yard 42 by the crane device 41. The broken bag pieces of the container 2B are put into the compression packaging device 33 as shown by the arrow D1 in the figure, compressed and packed, and then discharged.

Metal foreign objects S5 such as gas cylinders and reinforcing rods are removed from the stored objects S4 taken out to the bypass yard 42. The metal foreign matter S5 may be removed using heavy machinery 43, 44, or the like. The contained material S4 (mainly contaminated soil) from which the metal foreign matter S5 has been removed is carried by the heavy machinery 44 to the input belt conveyor 35, and is then input to the primary sorting device 22 via the input belt conveyor 21 of the primary separation processing section 20. It has become.

In this way, by processing the container 2B containing metal foreign matter in the bypass processing unit 40 that detours from the bag breaking device 17, damage to the bag breaking device 17 and the input belt conveyor 21 caused by the metal foreign matter can be avoided. It becomes possible to prevent damage. Moreover, by preventing damage to the bag-breaking device 17, it becomes possible to effectively prevent the processing of contaminated soil from being stopped due to the damage.

In this embodiment, the separation processing speed of the primary sorting device 22 and the conveyance speed of each belt conveyor 12, 13, 16, 21 are determined by the amount of treated soil stored in the treated soil relay yard 97 (see FIG. 4), which will be described later. Depending on the landfill progress status transmitted from the landfill status acquisition unit 200 (FIG. 1), the amount stored in the treated soil relay yard 97 is appropriately controlled so as not to exceed the upper limit amount.

[Secondary sorting section]
FIG. 3 is a schematic block diagram showing the secondary sorting section 50 according to this embodiment.

As shown in FIG. 3, the secondary sorting section 50 includes a soil measurement processing section (obtaining means) 51, a first-stage distribution processing section 56, a modifier addition section (modification material addition means) 60, and a second-stage distribution processing section 51. 64, a mixing section (mixing means) 70, and a secondary sorting section (second sorting means) 80.

The soil measurement processing unit 51 includes a quantitative feeder 52, a conveyor belt 53, and a soil measurement device 54.

The quantitative feeder 52 receives small-sized lumps (mainly lumps of contaminated soil) with an outer diameter of 100 mm or less separated by the primary sorting section 10 and sends them to the conveyor belt 53. The transport belt conveyor 53 transports the lumpy contaminated soil received from the quantitative feeder 52 toward the former stage distribution processing section 56 at the subsequent stage.

The soil quality measuring device 54 measures in real time the water content ratio, which is an index value of the amount of water contained in the lumpy contaminated soil transported on the transport belt conveyor 53. Specifically, the soil measuring device 54 includes a moisture meter 54A disposed on the bottom side of the conveyor belt 53. The moisture meter 54A, for example, evaluates the amount of hydrogen atoms in the contaminated soil by irradiating the contaminated soil with fast neutrons generated from radioactive isotopes and measuring the thermal neutrons generated from the contaminated soil, and determines the water content ratio. Measure. The moisture content ratio obtained in real time by the soil measuring device 54 is transmitted to the control unit 55. Note that the configuration of the soil measurement device 54 is not limited to one that irradiates with fast neutrons, and other known measurement devices can also be applied. Further, the index value of the amount of water contained in the lumpy contaminated soil is not limited to the water content ratio, and may be other index values such as water content.

The pre-stage distribution processing section 56 includes a pre-stage branch chute 57, a first branch conveyor belt conveyor 58, and a second branch conveyor belt conveyor 59.

The pre-stage branching chute 57 distributes the lumpy contaminated soil introduced from the conveyor belt 53. Specifically, the pre-stage branching chute 57 includes a chute main body 57A having a substantially inverted Y-shape having an input port 57B at the top and two discharge ports 57C and 57D at the bottom; It is provided with a plate member 57E that can adjust the distribution amount of the lump contaminated soil to be sorted into 57D. The plate member 57E is rotatably provided within the chute main body 57A, and by appropriately adjusting the inclination angle of the plate member 57E, the amount of lumpy contaminated soil distributed to each discharge port 57C, 57D can be adjusted. Alternatively, either one of the passages leading to each of the discharge ports 57C and 57D can be closed.

In this embodiment, the plate member 57E is oriented substantially vertically, and divides the flow of the lumpy contaminated soil input from the input port 57B into two approximately equally and distributes it to each of the discharge ports 57C and 57D. The lumpy contaminated soil discharged from each of the discharge ports 57C and 57D falls onto the first branch conveyor belt 58 and the second branch conveyor belt 59, respectively, and is conveyed toward the modifier addition section 60.

The modifier addition unit 60 includes a first modifier addition device 61 and a second modifier addition device 62.

The first modifier adding device 61 is provided above the first branch conveyor belt conveyor 58, and adds a soil conditioner (hereinafter simply a modifier) to the lumpy contaminated soil conveyed by the first branch conveyor belt 58. ) is added. The second modifier adding device 62 is provided above the second branch conveyor belt 59 and adds a modifier to the lumpy contaminated soil conveyed by the second branch conveyor belt 59. The modifier contains at least one of a water-absorbing polymer and a water-absorbing clay, and absorbs water between soil particles to make the contaminated soil smooth (low viscosity state). As the modifying material, for example, Sarasa Clean (registered trademark) can be used.

The amount of modifier added by each addition device 61, 62 is automatically controlled by the control unit 55. Specifically, a memory (not shown) of the control unit 55 stores a data table that is created in advance and defines the relationship between the water content ratio of contaminated soil and the amount of modifier added. In this data table, the amount of modifier added increases as the water content increases. The control unit 55 sets the target addition amount of the modifier by referring to the data table based on the water content ratio of the contaminated soil transmitted from the soil measuring device 54, and also sets the target addition amount of the modifier. Each addition device 61, 62 is automatically controlled so that .

In this way, by automatically controlling the amount of the modifier added based on the water content ratio acquired by the soil quality measuring device 54, the amount of the modifier added can be appropriately adjusted according to the water content ratio of the contaminated soil. This makes it possible to optimize the amount added. In addition, by branching the conveyance of the clumpy contaminated soil into two systems and adding the modifying material to the clumpy contaminated soil in these two systems from the respective addition devices 61 and 62, compared to the case where the conveyance is carried out in one system. , it becomes possible to suppress the amount of addition from each addition device 61, 62 to a small amount. By suppressing the amount of modifier added in each system to a small amount, it becomes possible to effectively promote mixing of the lumpy contaminated soil and the modifier in the mixing processing section 70 described below. In addition, in the mixing processing section 70 and the secondary separation processing section 80, which will be described later, if one system is stopped due to maintenance or failure, operation can be continued using the remaining two systems; Even if the system stops due to maintenance or failure, it is possible to continue operation using the remaining system.

The rear stage distribution processing section 64 includes a rear stage first branching chute 65 and a rear stage second branching chute 67.

The second-stage first branching chute 65 distributes the lumpy contaminated soil (first lumpy contaminated soil) to which the modifying material has been added, which is introduced from the first branching conveyor belt 58 . Specifically, the second-stage first branching chute 65 includes a chute main body 65A having a substantially inverted Y-shape having an input port 65B at the top and two discharge ports 65C and 65D at the bottom, and a chute main body 65A having a substantially inverted Y-shape having an input port 65B at the top and two discharge ports 65C and 65D at the bottom, and a chute body portion 65A having an input port 65B at the top and two discharge ports 65C and 65D at the bottom. It also includes a plate member 66 that can adjust the amount of first lumpy contaminated soil distributed to 65C and 65D. The plate member 66 is rotatably provided within the chute main body 65A, and by appropriately adjusting the inclination angle of the plate member 66, the amount of the first lumpy contaminated soil distributed to each discharge port 65C, 65D can be adjusted. or can close either one of the passages leading to the respective discharge ports 65C and 65D.

The latter-stage second branch chute 67 distributes the lump-like contaminated soil (second lump-like contaminated soil) to which the modifying material is added and which is input from the second branch conveyor belt conveyor 59 . Specifically, the rear second branching chute 67 includes a chute main body 67A having a substantially inverted Y shape having an input port 67B at the top and two discharge ports 67C and 67D at the bottom, and a chute main body 67A having a substantially inverted Y-shape having an input port 67B at the top and two discharge ports 67C and 67D at the bottom, and a chute main body portion 67A having an input port 67B at the top and two discharge ports 67C and 67D at the bottom. It also includes a plate member 68 that can adjust the amount of second lump contaminated soil distributed to 67C and 67D. The plate member 68 is rotatably provided within the chute main body 67A, and by appropriately adjusting the inclination angle of the plate member 68, the amount of second lumpy contaminated soil distributed to each discharge port 67C, 67D can be adjusted. or can close either one of the passages leading to the respective discharge ports 67C and 67D.

In this embodiment, the inclination angle of the plate member 66 of the second-stage first branching chute 65 is such that approximately 2/3 of the first lumpy contaminated soil input from the input port 65B is distributed to the discharge port 65C, and the remaining approximately 1/3 is distributed to the discharge port 65C. 3 is set at an angle that distributes the discharge port 65D to the discharge port 65D. Further, the inclination angle of the plate member 68 of the second branching chute 67 in the latter stage is such that approximately 1/3 of the second lumpy contaminated soil input from the input port 67B is distributed to the discharge port 67C, and the remaining approximately 2/3 is discharged. It is set at an angle to be distributed to the exit 67D.

The first lumpy contaminated soil (2/3) discharged from the discharge port 65C of the second branching chute 65 is fed into the first crushing and mixing device 71 of the mixing section 70, which will be described later. The second lumpy contaminated soil (2/3) discharged from the discharge port 67D is input into a third crushing and mixing device 73 of the mixing processing section 70, which will be described later. In addition, the first lumpy contaminated soil (1/3) is discharged from the outlet 65D of the first branching chute 65 at the rear stage, and the second lumpy contaminated soil (1/3) is discharged from the outlet 67C of the second branching chute 67 at the rear stage. 3) is fed into a second crushing and mixing device 72 of the mixing processing section 70, which will be described later. That is, the first lumpy contaminated soil and the second lumpy contaminated soil are distributed approximately equally to the three systems of crushing and mixing devices 71, 72, and 73, respectively.

The mixing processing unit 70 includes a first crushing mixer 71, a second crushing mixer 72, a third crushing mixer 73, a first input belt conveyor 74, a second input belt conveyor 75, and a third input belt. It includes a conveyor 76, a first stirring and mixing device 77, a second stirring and mixing device 78, and a third stirring and mixing device 79.

The first to third crushing and mixing devices (crushing and mixing means) 71, 72, and 73 are, for example, impact-type or rotary-type crushing and mixing devices, and while crushing the contaminated soil, mix the contaminated soil with the reforming material. Mix. In this embodiment, the blocky contaminated soil to which the reforming material has been added is distributed into three systems by the latter-stage distribution processing section 64, and is configured to be input into the first to third crushing and mixing devices 71, 72, and 73, respectively. has been done.

As a result, the amount of crushing and mixing required by each crushing and mixing device 71, 72, and 73 can be effectively suppressed, and crushing of contaminated soil and furthermore, mixing of the reforming material and contaminated soil can be reliably promoted. becomes possible. Furthermore, by distributing the crushing and mixing devices into three systems, it becomes possible to downsize each of the crushing and mixing devices 71, 72, and 73 to a size that can be transported by land, and it also becomes possible to suppress equipment costs. Furthermore, even if a failure occurs in any of the first to third crushing and mixing devices 71, 72, 73, the outlet ports 65C, 65D, 67C, 67D of the branch chutes 65, 67 of the failed system are blocked, By continuing the crushing and mixing process using the remaining systems, it is also possible to effectively prevent the processing of contaminated soil from stopping.

The first to third input belt conveyors 74, 75, and 76 receive the contaminated soil crushed and mixed by the respective crushing and mixing devices 71, 72, and 73, and transfer it to the first to third stirring and mixing devices 77, 78, and 79, respectively. throw into. The first to third stirring and mixing devices (stirring and mixing means) 77, 78, and 79 are, for example, biaxially parallel paddle mixers, and stir and mix the modifier and the contaminated soil. That is, the lumpy contaminated soil to which the reforming material has been added is crushed and mixed in the first to third crushing and mixing devices 71, 72, 73 in the former stage, and then crushed and mixed in the first to third stirring and mixing devices 77, 78, 79 in the latter stage. It is designed to be mixed by stirring. In this way, by crushing and mixing contaminated soil and reforming material in two stages, it becomes possible to mix these contaminated soil and reforming material effectively, and the efficiency of separating contaminated soil is surely improved. becomes possible.

The secondary sorting unit 80 includes a first input belt conveyor 81, a second input belt conveyor 82, a third input belt conveyor 83, a first sorting device 84, a second sorting device 85, and a third sorting device. 86.

The first input belt conveyor 81 receives the treated soil that has been stirred and mixed with the reforming material in the first stirring and mixing device 77 and inputs it into the first sorting device 84 . The second input belt conveyor 82 receives the treated soil that has been stirred and mixed with the reforming material in the second stirring and mixing device 78 and inputs it into the second sorting device 85 . The third input belt conveyor 83 receives the treated soil that has been stirred and mixed with the modifying material in the third stirring and mixing device 79 and inputs it into the third sorting device 86 .

The first to third sorting devices 84, 85, 86 are, for example, cylindrical rotary sorters (trommel type sorters), and include a cylindrical rotating drum 84A with a large number of through holes bored on the circumferential surface; It is equipped with 85A and 86A. An input port is provided at one end of the rotating drums 84A, 85A, 86A, and a discharge port is provided at the other end of the rotating drums 84A, 85A, 86A. The rotating drums 84A, 85A, and 86A are arranged with their rotation axes obliquely so that the input port is located above the discharge port.

The first to third sorting devices 84, 85, 86 are arranged so that among the lumps of treated soil input from the input port, the lumps of treated soil that are smaller in size than the through holes of the rotating drums 84A, 85A, 86A are separated from the rotating drum 84A, 85A, 86A. , 85A, and 86A, while lumps larger than the through holes are sent out to the discharge port.

In this embodiment, the diameter of the through holes of the rotating drums 84A, 85A, 86A is set to about 20 mm (an example of the third size of the present disclosure). That is, small-sized lumps of treated soil with an outer diameter of 20 mm or less fall downward from the rotating drums 84A, 85A, and 86A, as shown by arrows E1, E2, and E3 in the figure, and large-sized lumps of soil with an outer diameter of 20 mm or less fall downward from the rotating drums 84A, 85A, and 86A, as shown by arrows E1, E2, and E3 in the figure. The treated soil lumps are discharged from the discharge ports of the rotary drums 84A, 85A, 86A, as indicated by arrows F1, F2, and F3 in the figure, so that they are separated. Each lumped treated soil that has been discriminated is transported to a treated soil transport section 90, which will be described later.

In this embodiment, the rotational speeds of the crushing and mixing devices 71, 72, 73 and the stirring and mixing devices 77, 78, 79, the sorting speeds of the sorting devices 84, 85, 86, the belt conveyors 53, 58, 59, 74, 75, , 76, 81, 82, and 83 depend on the amount of treated soil stored in the treated soil relay yard 97 (see FIG. 4), which will be described later, and the landfill progress status sent from the landfill status acquisition unit 200 (FIG. 1). Accordingly, the amount stored in the treated soil relay yard 97 is appropriately controlled so as not to exceed the upper limit amount.

[Treated soil transportation department and treated soil relay yard]
FIG. 4 is a schematic block diagram showing the treated soil transport section 90 and the treated soil relay yard 97 according to this embodiment.

As shown in FIG. 4, the treated soil transport section 90 includes a final separation processing section 91 and a transportation processing section 94.

The final sorting section 91 includes an input belt conveyor 92 and a final sorting device 93. The input belt conveyor 92 receives the lump treated soil having an outer diameter larger than 20 mm, which has been sorted by the secondary sorting section 50, and inputs it into the final sorting device 93. The final sorting device 93 sorts the input lumps into light items and heavy items. Light objects sorted by the final sorting device 93 are treated as combustible materials S3, and heavy objects sorted by the final sorting device 93 are treated as non-combustible materials S1.

The transportation processing section 94 includes a sorting belt conveyor (export means) 95, a return yard (part of the return means) 96A, a quantitative feeder (part of the return means) 96B, and a return belt conveyor (part of the return means). 96C.

The sorting belt conveyor 95 receives the small-sized contaminated contaminated soil (including fine particles) with an outer diameter of 20 mm or less that has been sorted by the secondary sorting section 50, and transfers it to a treated soil relay yard 97 (storage means), which will be described later. Or selectively sorted to the return yard 96A.

Specifically, if the treated soil relay yard 97 has an acceptable capacity, the sorting belt conveyor 95 transports the treated soil in the direction of arrow A in the figure, and sends out the treated soil to the treated soil relay yard 97. On the other hand, if the treated soil relay yard 97 does not have enough capacity to accept it, the sorting belt conveyor 95 transports the treated soil in the direction of arrow B in the figure and sends the treated soil to the return yard 96A. Whether or not there is enough capacity to receive treated soil can be determined by measuring the amount of treated soil stored in the treated soil relay yard 97 using a camera or a laser measuring device.

The return yard 96A receives treated soil conveyed from the sorting belt conveyor 95. The treated soil received in the recirculation yard 96A is fed into a quantitative feeder 96B by a heavy machine 96D such as a wheel loader, and is recirculated to the sorting belt conveyor 95 via a recirculation belt conveyor 96C.

In other words, the treated soil is configured so that it can be recirculated through the sorting belt conveyor 95 → return yard 96A → quantitative feeder 96B → return belt conveyor 96C until the capacity of the treated soil relay yard 97 becomes available. . This makes it possible to continuously carry out the separation and reforming of contaminated soil without stopping the reception of contaminated soil brought in by truck T (see FIG. 1).

The treated soil relay yard (intermediate storage means) 97 includes belt conveyors 98, 99, and the like. The treated soil relay yard 97 stores the treated soil received via these belt conveyors 98, 99, etc. The treated soil stored in the treated soil relay yard 97 is carried out to a landfill site as appropriate, depending on the landfill progress status transmitted from the landfill status acquisition unit 200 (see FIG. 1).

Next, the flow of the contaminated soil separation process according to this embodiment will be explained based on the flowchart of FIG. 5.

In step S100, the receiving/carrying section 11 receives the containers 2 dropped by the dumping of the truck T, and conveys them to the alignment belt conveyor 13 (carrying step of the present disclosure).

In step S110, the metal detection device 14 detects whether or not metal foreign matter is mixed in the contents in the container 2 (detection step of the present disclosure). If no metal foreign matter is mixed in the stored item (No), the process proceeds to the bag tearing process of step S120. On the other hand, if metal foreign matter is mixed in the stored object (Yes), the process proceeds to bypass processing in step S130.

In step S120, the container 2A containing no metal foreign matter is put into the bag-breaking device 17, and the contents are taken out from the container 2A (bag-breaking step of the present disclosure). Next, in step S150, the contents (including torn bag pieces of the container 2, etc.) are put into the primary sorting device 22.

On the other hand, in step S130, the container 2B containing metal foreign matter is carried into the bypass yard 42, and the container 2B is broken with heavy machinery or the like to take out the container 2B. Next, in step S140, metal foreign matter is removed from the stored object (detour processing step of the present disclosure). Thereafter, the contained material from which metal foreign matter has been removed is placed into the primary sorting device 22 (see step S150). In this manner, when metal foreign matter is mixed into the stored items, by performing bypass processing to bypass the bag tearing device 17, damage to the bag tearing device 17 can be effectively prevented.

In step S150, the contents taken out from the containers 2A and 2B are put into the primary sorting device 22, and in step S160, small-sized lumpy contaminated soil with an outer diameter of 100 mm or less and large-sized contaminated soil with an outer diameter of 100 mm or less are separated. The lumps are separated (separation step of the present disclosure). Small-sized contaminated contaminated soil having an outer diameter of 100 mm or less is sent to secondary separation processing from step S200 onwards. On the other hand, lumps with an outer diameter larger than 100 mm are sent to the sorting process in step S170.

In step S170, lumps larger than 100 mm are put into the sorting device 32, and heavy noncombustibles, light combustibles, and small lumps with an outer diameter of 50 mm or less (mainly in the container 2A) are separated. Contaminated soil, etc. separated from broken bag pieces) are sorted (see step S175). The small-sized contaminated contaminated soil having an outer diameter of 50 mm or less is re-injected into the primary sorting device 22 in step S150. In this way, by re-feeding the lumpy contaminated soil that has been separated from heavy items and light items by the sorting device 32 into the primary sorting device 22, the contaminated soil that has adhered to the broken bag pieces of the container 2A can be effectively removed. It will be possible to collect it. On the other hand, the broken bag pieces of the containers 2A sorted in step S175 are put into the compression packing device 33 in step S176, compressed and packed, and then discharged.

In step S200, the water content ratio of the primarily separated lumpy contaminated soil is measured in real time. Next, in step S210, the lumpy contaminated soil is distributed into two systems.

In step S220, a modifying material is added to each of the two systems of lumpy contaminated soil. At this time, the amount of the modifier added is automatically controlled based on the water content ratio measured in step S200. This makes it possible to optimize the amount of modifier added.

In step S230, the blocky contaminated soil to which the modifying material has been added is distributed to three systems. Next, in step S240, the lump-added contaminated soil distributed to the three systems is crushed and mixed by crushing and mixing devices 71, 72, and 73, respectively, and further, in step S250, the crushed and mixed contaminated soil is crushed and mixed by stirring and mixing devices 77, 78. , 79 for stirring and mixing. In this way, by dissolving and mixing the contaminated soil and the modification material in two stages, the contaminated soil and the modification material can be effectively mixed.

In step S260, the treated soil that has been subjected to the reforming treatment is put into the sorting devices 84, 85, and 86, respectively, and in step S270, small lump treated soil with an outer diameter of 20 mm or less and lumpy treated soil with an outer diameter of more than 20 mm are separated. Separate the treated soil from large lumps (secondary separation).

The lumps that are separated in step S270 and have an outer diameter larger than 20 mm are fed into the final sorting device 93 in step S380, where they are separated into light items (combustible items) and heavy items (non-combustible items). Ru.

On the other hand, the small-sized treated soil lumps with an outer diameter of 20 mm or less that have been sorted in step S270 are transported to the treated soil relay yard 97. Specifically, in step S300, it is determined whether the treated soil relay yard 97 has a capacity that can be accepted, and if there is a capacity, the treated soil is transported to the treated soil relay yard 97 and stored (step S300). (See S310).

On the other hand, if the treated soil relay yard 97 does not have enough capacity to accept it, the treated soil is transported to the recirculation yard 96A, and the treated soil is recycled until there is sufficient capacity to accept it (see steps S300→S320). . This makes it possible to continue sorting and processing contaminated soil without stopping the acceptance of contaminated soil brought in by truck T, making it possible to effectively increase the amount of treated and landfilled soil. become.

[others]
Note that the present disclosure is not limited to the above-described embodiments, and can be modified and implemented as appropriate without departing from the spirit of the present disclosure.

For example, the application of the present disclosure is not limited to intermediate storage facilities for radioactively contaminated soil, but can also be widely applied to the sorting and processing of contaminated soil generated during civil engineering and construction work.

1 Separation processing system 10 Primary separation section 11 Receiving and carrying section (carrying means)
14 Metal detection device (detection means)
15 Bag breaking processing section (bag breaking means)
17 Bag-breaking device 20 Primary sorting processing section 22 Primary sorting device 30 Sorting processing section 32 Sorting device 35 Input belt conveyor 40 Bypass processing section (detour processing means)
41 Crane device 42 Bypass yard 50 Secondary separation section 51 Soil measurement processing section (acquisition means)
54 Soil quality measuring device 56 Pre-distribution processing section 60 Modifying material addition section (modifying material addition means)
61 First modifier addition device 62 Second modifier addition device 64 Post-distribution processing section 70 Mixing processing section (mixing means)
71, 72, 73 Crushing and mixing device (crushing and mixing means)
77, 78, 79 Stirring and mixing device (stirring and mixing means)
80 Secondary separation processing section (second separation means)
84, 85, 86 Sorting device 90 Treated soil transport section 95 Sorting belt conveyor (export means)
96A Return yard (return means)
96B Quantitative feeder (reflux means)
96C Reflux belt conveyor (reflux means)
97 Treated soil relay yard (intermediate storage means)
100 Management side terminal device 200 Landfill status acquisition unit (landfill status acquisition means)

Claims (8)

A transport means for receiving and transporting a container containing at least clumped contaminated soil as a container;
a detection means for detecting whether or not metal foreign matter is mixed in the contents carried into the container;
bag breaking means for breaking a container in which no metal foreign matter is detected by the detection means and taking out the contents from the container;
bypass processing means for detouring the container in which a metal foreign object has been detected by the detection means from the bag breaking means to take out the contained object from the container, and removing the metal foreign object from the taken out contained object;
The contained material taken out by the bag breaking means and/or the contained material from which metal foreign matter has been removed by being bypassed from the bag breaking means by the detour processing means is treated as a first lumpy contaminated soil having a predetermined first size or less; and a first sorting means for sorting into lumps larger than the first size. The sorting according to claim 1, wherein the bag-breaking means breaks the container in which no metal foreign matter is detected by the detection means, takes out the contents from the container, and separates concrete lumps from the taken-out contents. processing system. The lumps sorted by the first sorting means are sorted into combustibles, non-combustibles, and second lumps of contaminated soil of a predetermined second size or less, which is smaller than the first size. The separation processing system according to claim 1 or 2, further comprising a sorting means for reinjecting the second lumpy contaminated soil into the first sorting means. acquisition means for acquiring an index value of moisture contained in the first lumpy contaminated soil separated by the first classification means;
Modifying material addition means for adding a modifying material to the first lumpy contaminated soil based on the obtained index value;
Mixing means for generating treated soil by mixing the first lumpy contaminated soil to which the modifying material has been added with the modifying material while crushing it;
a second sorting means for separating the treated soil produced by the mixing means into first treated soil of a predetermined third size or less smaller than the first size and second treated soil larger than the third size; The separation processing system according to any one of claims 1 to 3, further comprising: The separation processing system according to claim 4, wherein the mixing means includes a crushing and mixing means that mixes the contaminated soil with the modifying material while crushing it, and an agitating and mixing means that stirs and mixes the contaminated soil with the modifying material. Conveying means for conveying the first treated soil separated by the second sorting means;
intermediate storage means for receiving and temporarily storing the first treated soil transported by the transporting means;
The sorting process according to claim 4 or 5, further comprising a reflux means for refluxing the first treated soil transported by the transporting means to the transporting means according to the amount of treated soil that can be received by the intermediate storage means. system. Further comprising a landfill status acquisition means for acquiring the landfill status of a landfill site capable of receiving the first treated soil carried out from the intermediate storage means,
The separation processing system according to claim 6, wherein the reflux means returns the first treated soil transported by the transport means to the transport means according to the landfill status acquired by the landfill status acquisition unit. a carrying-in step of receiving and carrying in a container containing at least lumpy contaminated soil as a container;
a detection step of detecting whether or not metal foreign matter is mixed in the contents carried into the container;
a bag-breaking step of breaking a container in which no metal foreign matter has been detected using a bag-breaking means and taking out the contents from the container;
a detouring step in which a container in which metal foreign matter has been detected is detoured from the bag breaking means to take out the contents from the container, and the metal foreign matter is removed from the taken out container;
The contained material taken out in the bag-breaking step and/or the contained material from which metal foreign matter has been removed by being bypassed from the bag-breaking means in the detour processing step, as a first lumpy contaminated soil having a predetermined first size or less; A sorting method comprising: a sorting step of sorting into lumps larger than the first size.

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