JP2020116564A - Fractionation treatment system and fractionation treatment method - Google Patents

Abstract

To effectively prevent breakage due to a metal foreign material mixed in a content of a container.SOLUTION: A fractionation treatment system includes: a receive and loading part 11 for receiving and loading a container 2 containing at least massive contaminated soil as a content; a detector 14 for detecting whether a metal foreign matter is mixed in the content; a bag breaking device 17 for taking out the content by bag breaking the container 2A in which the metal foreign matter is not detected; a bypass treatment part 40 that takes out the content by bypassing a container 2B in which the metal foreign matter is detected from the bag breaking device 17 and removing the metal foreign matter; and a primary fractionation device 22 for fractionating the content taken out by the bag breaking device 17, and/or a content from which the metal foreign matter is removed by the bypassing treatment part 40 to first massive contaminated soil having a size smaller than a predetermined size and a massive matter having a size larger than the first size.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a separation treatment system and a separation treatment method, and particularly to a technique suitable for the separation treatment of contaminated soil.

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

JP, 2016-128804, A

Here, the contents of the container carried into the intermediate storage facility may include hard foreign matter (hereinafter, metallic foreign matter) such as a gas cylinder and a reinforcing bar in addition to contaminated soil. In particular, when a large amount of contaminated soil is sorted, it is difficult to properly check the contents of the container, and the container may be directly put into the bag breaking device without checking the contents. For this reason, when the foreign matter contained in the container contains the bag breaking device, the belt conveyor in the subsequent stage, and the like, there is a problem that the processing of the contaminated soil is stopped.

The technique of the present disclosure has been made in view of the above circumstances, and an object thereof is to effectively prevent damage due to a metallic foreign substance mixed in the container contents.

The sorting system of the present disclosure has a carrying-in means for receiving and carrying in a container containing at least massive contaminated soil as a contained item, and a detection for detecting whether or not a metallic foreign matter is mixed in the contained item in the carried-in container. Means, bag-breaking means for bag-breaking a container in which no metallic foreign matter is detected by the detection means and taking out the contents from the container, and bypassing the container in which metal foreign matter is detected by the detecting means from the bag-breaking means By removing the contained matter from the container and removing the metallic foreign matter from the taken-out contained matter, the detouring treatment means, the contained matter taken out by the bag breaking means, and/or the metallic foreign matter removed by the detouring means It is characterized by comprising a first sorting means for sorting the contained material into a first lump contaminated soil having a predetermined size or less and a lump having a size larger than the first size.

In addition, the agglomerates separated by the first separating means are separated into combustibles, incombustibles, and second agglomerated contaminated soil having a predetermined second size smaller than the first size, and also selected. It is preferable to further include a sorting means for re-inputting the second massive contaminated soil into the first sorting means.

In addition, an acquisition unit that acquires an index value of water contained in the first lump contaminated soil separated by the first separation unit, and the first lump contaminated soil is modified based on the acquired index value. Modifying means for adding a modifying material, mixing means for generating treated soil by mixing with the modifying material while crushing the first massive contaminated soil to which the modifying material has been added, and the mixing means A second sorting means for sorting the treated soil generated by the method into a first treated soil of a predetermined third size or less smaller than the first size and a second treated soil larger than the third size. It is preferable to further provide.

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

A transport means for transporting the first treated soil sorted by the second sorting means, an intermediate storage means for receiving and temporarily storing the first treated soil transported by the transport means, It is preferable to further include a return means for returning the first treated soil conveyed by the conveying means to the conveying means according to the amount of the treated soil that can be received by the intermediate storage means.

Further, the method further comprises landfill status acquisition means for acquiring the landfill status of the landfill that can receive the first treated soil carried out from the intermediate storage means, and the return means is the first means carried by the carrying means. It is preferable that the treated soil is returned to the carrying means according to the landfill status acquired by the landfill status acquisition means.

The separation treatment method of the present disclosure includes a carrying-in step of receiving and carrying in a container containing at least massive contaminated soil as a contained item, and detection for detecting whether or not a metallic foreign matter is mixed in the contained item in the carried-in container. A step of breaking the container in which no metal foreign matter is detected by the bag breaking means to take out the contents from the container, and a container in which the foreign metal is detected is diverted from the bag breaking means. A detouring process step of removing the foreign matter from the container while removing the foreign matter from the container, a contained matter taken out by the bag breaking step, and/or an article having the metallic foreign matter removed by the detouring step. Is separated into a first lump contaminated soil of a predetermined first size or smaller and a lump larger than the first size.

According to the technique of the present disclosure, it is possible to effectively prevent damage due to metallic foreign matter mixed in the contents of the container.

It is a typical whole block diagram showing the classification processing system concerning this embodiment. It is a schematic block diagram which shows the primary classification part which concerns on this embodiment. It is a schematic block diagram which shows the secondary classification part which concerns on this embodiment. It is a schematic block diagram which shows the treated soil conveyance part which concerns on this embodiment, and a treated soil relay yard. It is a flow chart figure explaining classification processing of contaminated soil concerning this embodiment.

Hereinafter, a classification processing system and a classification processing method according to the present embodiment will be described with reference to the accompanying drawings. The same parts are designated by 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 separation processing system 1 according to the present embodiment.

The separation treatment 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 unit 10, a secondary sorting unit 50, a treated soil transporting unit 90, and a treated soil relay yard 97. In the figure, reference numeral 100 indicates a management side terminal device installed in a central monitoring room or the like that manages the separation processing system 1. Further, reference numeral 200 indicates a landfill status acquisition unit (landfill status acquisition means) that acquires the landfill progress status (for example, the acceptable amount of the treated soil) on the receiving side that receives the treated soil, such as a landfill. As the landfill status acquisition unit 200, for example, a camera or the like that can take an aerial image of an aircraft such as a drone or an image of the entire landfill can be used. As for the landfill progress status, an acceptable capacity (initial capacity) of the landfill is stored in advance, and the treated soil carry-out amount (integrated value) carried out from the treated soil relay yard 97 to the landfill by a dump truck or the like is subtracted. It may be acquired 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 by a load cell or the like. In this case, the landfill status acquisition unit 200 may be provided not on the landfill site side but on the separation processing system 1 side. In addition, the landfill progress status is estimated by receiving position information (for example, height information) of the heavy equipment vehicle from a GPS (Global Positioning System) device mounted on the heavy equipment vehicle such as a bulldozer working in the landfill. You may.

The management-side terminal device 100 and the landfill status acquisition unit 200 are connected to each other via a network N such as a mobile phone line so as to be capable of wireless communication with each other. The operating state 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 from the landfill status acquisition unit 200 to the management-side terminal device 100 in real time. It is like this. The communication between the management-side 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 unit 10 according to the present embodiment.

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

The receiving/carrying-in unit 11 includes a plurality of receiving belt conveyors 12A, 12B, 12C, an alignment belt conveyor 13, and a metal detecting device (detecting means) 14 in order from the upstream side.

The receiving belt conveyors 12A, 12B, 12C are arranged substantially in parallel with each other, and receive the container 2 containing the contaminated soil or the like from the truck T. Specifically, the receiving belt conveyors 12A, 12B, and 12C receive the container 2 that is loaded and dropped from the loading platform due to the dump-up of the truck T, and convey the received container 2 to the alignment belt conveyor 13 on the downstream side.

The number of receiving belt conveyors 12A, 12B, 12C is not limited to three in the illustrated example, and may be one, two, or four or more. If a plurality of receiving belt conveyors 12A, 12B, 12C are provided, the containers 2 can be received simultaneously from a plurality of trucks T, and the receiving efficiency can be improved. The method of receiving the container 2 is not limited to dumping up the truck T, and the container 2 may be received by hoisting the container 2 with a heavy machine (not shown).

The alignment belt conveyor 13 conveys the containers 2 loaded from the receiving belt conveyors 12A, 12B, 12C toward the bag-breaking processing unit 15 on the downstream side. In the present embodiment, the alignment belt conveyor 13 is provided with a position sensor 13A that can detect the position information of the container 2 that has dropped 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 uses 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 based on the position information transmitted from the position sensor 13A. Are automatically aligned in sequence.

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 on the downstream side of the alignment mechanism 13B. The metal detection device 14 detects whether or not a metal foreign matter such as a gas cylinder or a reinforcing bar is mixed in the contents of the container 2 flowing through the alignment belt conveyor 13. The container 2A in which the metal foreign matter is not detected by the metal detection device 14 is sent to the bag-breaking processing section 15 on the downstream side, and the container 2B in which the metal foreign matter is detected by the metal detection device 14 is processed by the bag-breaking treatment. It is sent to the bypass processing unit 40 described later without being sent to the unit 15.

In this way, by sorting the container 2B in which the metal foreign matter is detected by the metal detection device 14 into the bypass processing unit 40 that bypasses the bag-breaking processing unit 15, it is possible to effectively prevent damage to the bag-breaking device 17 described later. It becomes possible to prevent. The arrangement position of the metal detection device 14 is not limited to the alignment belt conveyor 13 in the illustrated example, but may be provided on each of the receiving belt conveyors 12A, 12B, 12C. If the metal detection device 14 is provided on the alignment belt conveyor 13, the number of the metal detection devices 14 can be one, and the facility cost can be reduced.

The bag-breaking processing unit 15 includes a loading belt conveyor 16 and a bag-breaking device 17 in order from the upstream side.

The loading belt conveyor 16 loads the container 2A, which is received from the alignment belt conveyor 13 and contains no foreign metal, into the bag breaking device 17. The bag-breaking device 17 includes at least a pair of rotating drums 18 and 19 in a housing 17A having an input port on the upper side and a discharge port on the lower side. The rotary drums 18 and 19 are provided with a rotary cutter (not shown) or the like, and the rotary drums 18 and 19 rotate in opposite directions to each other at different rotational speeds.

That is, the container 2A introduced into the housing 17A from the introduction port is guided between the rotary drums 18 and 19 and is torn by the rotary cutters of the rotary drums 18 and 19 which rotate in opposite directions to each other, so that the container 2A The contents are to be taken out from. The broken pieces of the container 2A and the stored items (mainly, lumps of contaminated soil and incombustibles such as small stones) taken out of the container 2A are discharged from the housing 17A as shown by an arrow A1 in the figure. From the above to the downward direction to the charging belt conveyor 21 described later. On the other hand, when the contained material contains a foreign matter such as a large concrete block, the foreign matter exerts a certain force or more on the rotary cutter, so that the rotary cutter reverses. When the rotary cutter rotates in the reverse direction, large foreign matter is discharged from the foreign matter discharge gate as shown by an arrow A2 in the figure, so that the foreign matter is separated from the broken bag pieces and the lumps of contaminated soil.

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

The loading belt conveyor 21 receives the contained items taken out of the container 2A by the bag breaking device 17 and the broken bag pieces of the container 2A torn by the bag breaking device 17 and loads 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 having a large number of through holes formed in its peripheral surface. An input port 24 is provided on one end side of the rotary drum 23, and a discharge port 25 is provided on the other end side of the rotary drum 23. The rotary drum 23 is arranged with the axis of rotation inclined so that the inlet 24 is located above the outlet 25. In the primary sorting device 22, a lump having a size smaller than the through hole of the rotary drum 23 among the lumps charged from the charging port 24 drops downward from the rotary drum 23, and a lump having a size larger than the through hole. The object is configured to be discharged to the discharge port 25.

In the present embodiment, the diameter of the through hole of the rotary drum 23 is set to about 100 mm (an example of the first size of the present disclosure). That is, a small size lump (mainly a lump of contaminated soil) having an outer diameter of 100 mm or less falls downward from the rotary drum 23 as indicated by an arrow B1 in the figure, and the secondary sorting unit 50 described later is used. Sent to. On the other hand, an agglomerate having an outer diameter larger than 100 mm (mainly a combustible material such as a broken bag piece of the container 2A, contaminated soil attached to the broken bag piece, an incombustible material such as stone) is indicated by an arrow B2 in the figure. As shown in the drawing, it is designed to drop from the discharge port 25 toward the sorting belt conveyor 31 of the sorting processing unit 30 described later.

The selection processing unit 30 includes a selection belt conveyor 31, a selection device 32, a compression packing device 33, a conveyor belt conveyor 34, and a loading belt conveyor 35.

The sorting belt conveyor 31 receives the lumps having a size larger than 100 mm sorted by the primary sorting device 22 and conveys them to the sorting device 32.

The sorting device 32 sorts the put-in lumps into a non-combustible substance S1 having a relatively large weight, a lump substance having a small size (mainly a lump of contaminated soil) S2, and a combustible substance S3 having a relatively small weight. .. Specifically, the sorting device 32 includes a housing-shaped main body portion 32A having an opening at the top and an outlet at the bottom, a blower 32B, and a swing plate 32C having a large number of through holes. I have it.

The main body 32A and the swing plate 32C housed in the main body 32A are obliquely arranged so that one end side is lower than the other end side. The blower 32B is provided in the main body 32A adjacent to the inlet, and is provided so as to send the wind from one end side to the other end side in the main body 32A.

The sorting device 32 discharges the heavy incombustibles S1 (mainly stones etc.) from the one end side of the main body 32A (see the arrow C1) among the lumps charged into the main body 32A from the charging port (see arrow C1). The light combustible material S3 (mainly the broken pieces of the container 2A and the like) is discharged from the other end side of the main body portion 32A by the blower 32B (see arrow C2). The combustible material S3 thus selected is put into the compression packing device 33 as shown by an arrow C3 in the figure, compressed and packed, and then discharged.

In addition, the sorting device 32, regarding the lumps having a relatively small size (mainly the lumpy contaminated soil separated from the broken bag pieces of the container 2A) S2 among the lumps that have been loaded into the main body 32A from the loading port. , The oscillating plate 32C is passed through a through hole for selection. In the present 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 oscillating plate 32C as indicated by an arrow C3 in the figure. The lump S2 that has fallen is received by the conveyor belt conveyor 34 and is returned to the input belt conveyor 21 of the primary separation processing unit 20 via the input belt conveyor 35, and is re-input to the primary sorting device 22. .. In this way, by reintroducing the lumped contaminated soil that has been separated and sorted from the heavy or light weight by the sorting device 32 into the primary separation processing unit 20, the contaminated soil adhering to the broken pieces of the container 2A can be effectively used. It becomes possible to process it.

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

The crane device 41 lifts the container 2</b>B in which the metal foreign matter is detected by the metal detection device 14 and conveys it to the bypass yard 42. The transportation to the bypass yard 42 is not limited to the crane, and may be performed by a heavy machine (not shown). The heavy equipment 43 takes out the stored item S4 from the container 2B by breaking the container 2B carried into the bypass yard 42 by the crane device 41. The broken pieces of the container 2B are put into the compression packing device 33 as shown by an arrow D1 in the figure, compressed and packed, and then discharged.

From the container S4 taken out to the bypass yard 42, the foreign metal S5 such as a gas cylinder or a reinforcing bar is removed. The removal of the metallic foreign matter S5 may be performed by the heavy equipment 43, 44 or the like. The container S4 (mainly contaminated soil) from which the metallic foreign matter S5 has been removed is carried to the feeding belt conveyor 35 by the heavy machine 44 and is fed to the primary sorting device 22 via the feeding belt conveyor 21 of the primary sorting processing unit 20. It has become.

In this way, by processing the container 2B in which the metal foreign matter is mixed into the contained object in the bypass processing unit 40 that bypasses the bag destroying apparatus 17, the bag destroying apparatus 17 and the loading belt conveyor 21 caused by the metal foreign matter are processed. It is possible to prevent damage in advance. Further, since the damage of the bag breaking device 17 is prevented, it is possible to effectively prevent the processing stop of the contaminated soil due to the damage.

In the present embodiment, the sorting processing speed of the primary sorting device 22 and the transport speed of each belt conveyor 12, 13, 16, 21 are the storage amount of the treated soil in the treated soil relay yard 97 (see FIG. 4) described later, Depending on the landfill progress status transmitted from the landfill status acquisition unit 200 (FIG. 1), the storage amount of 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 unit 50 according to the present embodiment.

As shown in FIG. 3, the secondary sorting unit 50 includes a soil measurement processing unit (acquisition unit) 51, a pre-stage distribution processing unit 56, a modifier addition unit (modifier addition unit) 60, and a post-stage distribution process. It is provided with a section 64, a mixing processing section (mixing means) 70, and a secondary classification processing section (second classification means) 80.

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

The quantitative feeder 52 receives the small-sized lumps (mainly lumped contaminated soil) having an outer diameter of 100 mm or less sorted by the primary sorting unit 10 and sends them to the conveyor belt conveyor 53. The conveyor belt conveyor 53 conveys the lumped contaminated soil received from the fixed quantity feeder 52 toward the pre-stage distribution processing unit 56 in 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 massive contaminated soil transported on the transport belt conveyor 53. Specifically, the soil quality measuring device 54 includes a moisture meter 54A arranged on the bottom surface side of the conveyor belt conveyor 53. The moisture meter 54A, for example, irradiates fast neutrons generated from a radioisotope to the massive contaminated soil, and measures thermal neutrons generated from the massive contaminated soil to evaluate the amount of hydrogen atoms in the contaminated soil and evaluate the water content ratio. To measure. The water content ratio acquired in real time by the soil quality measuring device 54 is transmitted to the control unit 55. The structure of the soil quality measuring device 54 is not limited to the one that irradiates fast neutrons, and other known measuring devices can be applied. Further, the index value of the water content contained in the massive contaminated soil is not limited to the water content ratio, and may be another index value such as the water content.

The pre-stage distribution processing unit 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 branch chute 57 distributes the lumped contaminated soil fed from the conveyor belt conveyor 53. Specifically, the front-stage branch chute 57 is a chute main body 57A having a substantially inverted Y-shape having a charging port 57B in the upper part and two discharging ports 57C, 57D in the lower part, and each discharging port 57C from the charging port 57B. 57D and a plate member 57E capable of adjusting the distribution amount of the lumped contaminated soil. The plate member 57E is rotatably provided in the chute main body 57A, and the distribution amount of the massive contaminated soil to the respective discharge ports 57C and 57D is adjusted by appropriately adjusting the inclination angle of the plate member 57E. Alternatively, either of the passages leading to the discharge ports 57C and 57D can be closed.

In the present embodiment, the plate member 57E is oriented in a substantially vertical direction and divides the flow of the massive contaminated soil that is input from the input port 57B into two substantially evenly and distributes them to the respective discharge ports 57C and 57D. The massive contaminated soil discharged from each of the discharge ports 57C and 57D falls on the first branch conveyor belt conveyor 58 and the second branch conveyor belt conveyor 59, respectively, and is conveyed toward the modifying agent adding section 60.

The modifying material adding unit 60 is configured to include a first modifying material adding device 61 and a second modifying material adding device 62.

The first modifier addition device 61 is provided above the first branch conveyor belt conveyor 58, and the soil contaminated soil conveyed by the first branch conveyor belt conveyor 58 can be used as a soil conditioner (hereinafter referred to simply as a modifier). ) Is added. The second modifying material adding device 62 is provided above the second branching conveyor belt conveyor 59, and adds the modifying material to the lumped contaminated soil carried by the second branching conveyor belt conveyor 59. The modifier contains at least one of a water-absorbent polymer and a water-absorbent clay, and absorbs water between soil particles to make the contaminated soil into a dry state (low-viscosity state). As the modifier, for example, Sarasaclean (registered trademark) can be used.

The addition amount of the modifier in each of the addition devices 61 and 62 is automatically controlled by the control unit 55. Specifically, a memory table (not shown) of the control unit 55 stores a data table that defines the relationship between the water content ratio of the contaminated soil and the addition amount of the modifier, which is created in advance. In this data table, the higher the water content ratio, the larger the amount of the modifier added. 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 at the same time, sets the target addition amount of the modifier. Each of the adding devices 61 and 62 is automatically controlled so that is added.

In this way, by automatically controlling the addition amount of the modifying material based on the water content ratio acquired by the soil measuring device 54, the addition amount of the modifying material is appropriately adjusted according to the water content ratio of the contaminated soil. As a result, the addition amount can be optimized. In addition, by branching the transportation of lumpy contaminated soil into two systems and adding modifiers to these two systems of lumped contaminated soil from each of the adding devices 61 and 62, respectively It is possible to suppress the addition amount from each of the addition devices 61 and 62 to be small. By suppressing the addition amount of the modifier in each system to be small, it becomes possible to effectively promote the mixing of the massive contaminated soil and the modifier in the mixing processing unit 70 described later. Further, in the mixing processing unit 70 and the secondary sorting processing unit 80, which will be described later, when one system is stopped due to maintenance or failure, the remaining two systems can be used to continue the operation, and further two systems can be used. Even when is stopped due to maintenance or failure, it is possible to continue operation using the remaining one system.

The post-stage distribution processing unit 64 includes a post-stage first branch chute 65 and a post-stage second branch chute 67.

The post-stage first branch chute 65 distributes the block-like contaminated soil (first block-like contaminated soil) to which the modifying material added from the first branch conveyance belt conveyor 58 is added. Specifically, the rear-stage first branch chute 65 includes a chute main body 65A having a substantially inverted Y shape having a charging port 65B in the upper part and two discharging ports 65C and 65D in the lower part, and each discharging port from the charging port 65B. And a plate member 66 capable of adjusting the distribution amount of the first massive contaminated soil to 65C and 65D. The plate member 66 is rotatably provided in the chute main body portion 65A, and by appropriately adjusting the inclination angle of the plate member 66, the distribution amount of the first massive contaminated soil to the respective discharge ports 65C and 65D. Is adjusted, or one of the passages reaching the respective discharge ports 65C and 65D can be closed.

The second-stage second branch chute 67 distributes the lumped contaminated soil (second lumped contaminated soil) to which the modifying material added from the second branch conveyance belt conveyor 59 is added. Specifically, the rear-stage second branch chute 67 includes a chute main body 67A having a substantially inverted Y shape having a charging port 67B in the upper part and two discharging ports 67C and 67D in the lower part, and each discharging port from the charging port 67B. And a plate member 68 capable of adjusting the distribution amount of the second massive contaminated soil to 67C and 67D. The plate member 68 is rotatably provided in the chute body 67A, and the amount of distribution of the second massive contaminated soil to the discharge ports 67C and 67D is adjusted by appropriately adjusting the inclination angle of the plate member 68. Is adjusted or one of the passages leading to the respective discharge ports 67C and 67D can be closed.

In the present embodiment, the inclination angle of the plate member 66 of the rear-stage first branch chute 65 is such that about 2/3 of the first massive contaminated soil charged from the charging port 65B is distributed to the discharging port 65C, and the remaining about 1/3. 3 is set to an angle for distributing 3 to the discharge port 65D. Further, the inclination angle of the plate member 68 of the rear-stage second branch chute 67 is such that about 1/3 of the second massive contaminated soil charged from the charging port 67B is distributed to the discharging port 67C, and the remaining about 2/3 is discharged. The angle is set so as to distribute to the outlet 67D.

The first massive contaminated soil (2/3) discharged from the discharge port 65C of the rear-stage first branch chute 65 is put into the first crushing and mixing apparatus 71 of the mixing processing unit 70 described later, and the second-stage second branch chute 67 of the rear-stage second branch chute 67 is discharged. The second massive contaminated soil (2/3) discharged from the discharge port 67D is put into the third crushing and mixing device 73 of the mixing processing unit 70 described later. Further, the first massive contaminated soil (1/3) discharged from the discharge port 65D of the second downstream branch chute 65 and the second massive contaminated soil (1/3) discharged from the discharge port 67C of the second downstream branch chute 67. 3) is put into the second crushing and mixing device 72 of the mixing processing unit 70 described later. That is, the first blocky contaminated soil and the second blocky contaminated soil are substantially evenly distributed to the three systems of crushing and mixing devices 71, 72, 73, respectively.

The mixing processing unit 70 includes a first crushing/mixing device 71, a second crushing/mixing device 72, a third crushing/mixing device 73, a first charging belt conveyor 74, a second charging belt conveyor 75, and a third charging belt. The conveyor 76, the 1st stirring-mixing apparatus 77, the 2nd stirring-mixing apparatus 78, and the 3rd stirring-mixing apparatus 79 are provided.

The first to third crushing/mixing devices (crushing/mixing means) 71, 72, 73 are, for example, impact-type or rotary-type crushing/mixing devices, and while crushing the contaminated soil, the contaminated soil and the modifying material are used. To mix. In the present embodiment, the block-like contaminated soil to which the modifier has been added is distributed to three systems by the post-stage distribution processing unit 64 and is introduced into the first to third crushing/mixing devices 71, 72, 73, respectively. Has been done.

As a result, it is possible to effectively reduce the amount of crushing and mixing to be borne by each crushing and mixing device 71, 72, 73, and to reliably promote the crushing of contaminated soil and the mixing of the modifying material and the contaminated soil. Will be possible. Further, by distributing the crushing/mixing devices 71, 72, 73 to three systems, the crushing/mixing devices 71, 72, 73 can be downsized to a size capable of being transported by land, and the facility cost can be suppressed. In addition, even when a failure occurs in any of the first to third crushing/mixing devices 71, 72, 73, the outlets 65C, 65D, 67C, 67D of the branch chutes 65, 67 of the failed system are closed, By continuing the crushing and mixing process using the remaining system, it is possible to effectively prevent the stoppage of the contaminated soil process.

The first to third input belt conveyors 74, 75, 76 receive the contaminated soil crushed and mixed by the respective crushing/mixing devices 71, 72, 73, and are respectively transferred to the first to third stirring/mixing devices 77, 78, 79. throw into. The first to third stirring and mixing devices (stirring and mixing means) 77, 78, 79 are, for example, biaxial parallel type paddle mixers, and stir and mix the modifier and the contaminated soil. That is, the block-like contaminated soil to which the modifier is added is crushed and mixed by the first to third crushing and mixing devices 71, 72, 73 in the former stage, and further, the first to third stirring and mixing devices 77, 78, 79 in the latter stage. It is configured to be mixed by stirring. By thus crushing and mixing the contaminated soil and the modifying material in two stages, the contaminated soil and the modifying material can be effectively mixed, and the efficiency of separating the contaminated soil is surely improved. It will be possible.

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

The first feeding belt conveyor 81 receives the treated soil that has been agitated and mixed with the modifying material by the first agitating and mixing device 77, and feeds it to the first separating device 84. The second feeding belt conveyor 82 receives the treated soil that has been agitated and mixed with the modifying material by the second agitating and mixing device 78, and inputs it into the second separating device 85. The third feeding belt conveyor 83 receives the treated soil that has been agitated and mixed with the modifying material by the third agitating and mixing device 79, and feeds it to the third sorting device 86.

The first to third sorting devices 84, 85, 86 are, for example, cylindrical rotary sorting machines (Trommel type sorting machines), and have a cylindrical rotating drum 84A having a large number of through holes formed in the peripheral surface thereof. Equipped with 85A and 86A. The rotary drums 84A, 85A, 86A are provided with an inlet on one end side, and the rotary drums 84A, 85A, 86A are provided with an outlet on the other end side. The rotary drums 84A, 85A, and 86A are arranged with their rotation axes inclined so that the input port is located above the discharge port.

In the first to third sorting devices 84, 85, 86, among the lumps of the treated soil charged from the charging port, the lumped treated soil having a smaller size than the through holes of the rotary drums 84A, 85A, 86A is the rotary drum 84A. , 85A, 86A, the lump processing having a size larger than the through hole is sent to the discharge port.

In the present embodiment, the diameter of the through holes of the rotary drums 84A, 85A, 86A is set to about 20 mm (an example of the third size of the present disclosure). That is, the small-sized lumped soil having an outer diameter of 20 mm or less falls downward from the rotary drums 84A, 85A, 86A as indicated by arrows E1, E2, E3 in the figure, and the outer diameter of the large-sized soil is larger than 20 mm. As shown by arrows F1, F2, and F3 in the figure, the lumped treated soil is discharged from the outlets of the rotary drums 84A, 85A, and 86A, so that these are separated. Each of the discriminated aggregated treated soils is carried out to the treated soil carrying section 90 described later.

In the present embodiment, the rotation speeds of the crushing/mixing devices 71, 72, 73 and the stirring/mixing devices 77, 78, 79, the separation processing speeds of the separating devices 84, 85, 86, the respective belt conveyors 53, 58, 59, 74, 75. , 76, 81, 82, 83, the transport speed of the treated soil in the treated soil relay yard 97 (see FIG. 4), which will be described later, and the landfill progress status transmitted from the landfill status acquisition unit 200 (FIG. 1). Accordingly, the storage amount of the treated soil relay yard 97 is appropriately controlled so as not to exceed the upper limit amount.

[Treatment of treated soil and relay yard for treated soil]
FIG. 4 is a schematic block diagram showing the treated soil transporting section 90 and the treated soil relay yard 97 according to the present embodiment.

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

The final sorting unit 91 includes a feeding belt conveyor 92 and a final sorting device 93. The loading belt conveyor 92 receives the lumped treated soil having an outer diameter larger than 20 mm sorted by the secondary sorting unit 50, and loads it into the final sorting device 93. The final sorting device 93 sorts the put-in lumps into lightweight and heavy ones. The lightweight material sorted by the final sorting device 93 is processed as a combustible material S3, and the heavy material sorted by the final sorting device 93 is processed as an incombustible material S1.

The transportation processing unit 94 includes a sorting belt conveyor (carrying out means) 95, a reflux yard (a part of the refluxing means) 96A, a fixed quantity feeder (a part of the refluxing means) 96B, and a refluxing belt conveyor (a part of the refluxing means). It is equipped with 96C.

The sorting belt conveyor 95 receives the small-sized blocky contaminated soil (including fine particles) sorted by the secondary sorting unit 50 and having an outer diameter of 20 mm or less, and the treated soil relay yard 97 (storage means) described later. Alternatively, it is selectively sorted into the reflux yard 96A.

Specifically, when the treated soil relay yard 97 has a sufficient capacity, the sorting belt conveyor 95 conveys the treated soil in the direction of arrow A in the figure and sends the treated soil to the treated soil relay yard 97. On the other hand, when there is not enough capacity in the treated soil relay yard 97, the sorting belt conveyor 95 conveys the treated soil in the direction of the arrow B in the figure and sends the treated soil to the return yard 96A. Whether or not there is a sufficient capacity for receiving treated soil may be determined by measuring the amount of treated soil stored in the treated soil relay yard 97 with a camera or a laser measuring instrument.

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

That is, the treated soil can be recirculated through the sorting belt conveyor 95, the recirculation yard 96A, the fixed quantity feeder 96B, and the recirculation belt conveyor 96C until the capacity of the treated soil relay yard 97 becomes large. .. As a result, it becomes possible to continuously perform the separation/reformation process of the contaminated soil without stopping the acceptance of the contaminated soil carried by the 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 the belt conveyors 98, 99 and the like. The treated soil stored in the treated soil relay yard 97 is appropriately carried to the landfill according to the landfill progress status transmitted from the landfill status acquisition unit 200 (see FIG. 1 ).

Next, the flow of the contaminated soil separation processing according to the present embodiment will be described based on the flowchart of FIG.

In step S100, the receiving and loading unit 11 receives the container 2 that is dropped and dropped by the dump up of the truck T, and conveys it to the alignment belt conveyor 13 (the loading step of the present disclosure).

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

In step S120, the container 2A containing no metallic foreign matter is loaded into the bag breaking device 17, and the contained product is taken out from the container 2A (bag breaking step of the present disclosure). Next, in step S150, the contained items (including the broken pieces of the container 2 and the like) are put into the primary sorting device 22.

On the other hand, in step S130, the container 2B in which the foreign matter is contained is carried into the bypass yard 42, and the container 2B is crushed by a heavy machine or the like to take out the contained matter. Next, in step S140, the metallic foreign matter is removed from the contained object (the detouring processing step of the present disclosure). After that, the contained matter from which the metallic foreign matter is removed is put into the primary sorting device 22 (see step S150). In this way, when the metal foreign matter is mixed in the contained items, the bypassing process of bypassing the bag breaking device 17 is performed, so that the bag breaking device 17 can be effectively prevented from being damaged.

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, a small-sized blocky contaminated soil having an outer diameter of 100 mm or less and an outer diameter of 100 mm or more. The agglomerates are separated (sorting step of the present disclosure). The small-sized lumpy contaminated soil having an outer diameter of 100 mm or less is sent to the secondary sorting process after step S200. On the other hand, lumps having an outer diameter larger than 100 mm are sent to the sorting process in step S170.

In step S170, a lump having a size larger than 100 mm is put into the sorting device 32, and a heavy incombustible, a light combustible, and a lump having a small outer diameter of 50 mm or less (mainly in the container 2A). And the contaminated soil separated from the broken pieces (see step S175). The small size contaminated soil having an outer diameter of 50 mm or less is re-input to the primary sorting device 22 in step S150. In this way, by reintroducing the lumped contaminated soil that has been separated and sorted from the heavy object or the lighter object by the sorting device 32 into the primary sorting device 22, the contaminated soil adhering to the broken bag pieces of the container 2A can be effectively used. Will be able to be collected. On the other hand, the broken pieces of the container 2A selected 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 primary contaminated massive contaminated soil is measured in real time. Next, in step S210, the massive contaminated soil is distributed to two systems.

In step S220, the modifier is added to each of the massive contaminated soils distributed in the two systems. At this time, the addition amount of the modifier is automatically controlled based on the water content ratio measured in step S200. As a result, the addition amount of the modifier can be optimized.

In step S230, the massive contaminated soil to which the modifier is 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 stirred and mixed by devices 77 and 78. , 79 and mix with stirring. As described above, the contaminated soil and the modifying material can be effectively mixed by breaking and mixing the contaminated soil and the modifying material in two steps.

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, the aggregated treated soil having a small outer diameter of 20 mm or less and the outer diameter of 20 mm or less. Separation with large-sized lumped soil (secondary sorting).

The agglomerates having an outer diameter larger than 20 mm sorted in step S270 are put into the final sorting device 93 in step S380 and sorted into lightweight (combustible) and heavy (incombustible). It

On the other hand, the small-sized aggregated treated soil having an outer diameter of 20 mm or less, which is sorted in step S270, is carried out to the treated soil relay yard 97. Specifically, in step S300, it is determined whether or not there is a sufficient capacity for the treated soil relay yard 97, and if there is a sufficient capacity, it is transported to the treated soil relay yard 97 and stored (step S300). See S310).

On the other hand, when the treated soil relay yard 97 does not have an acceptable capacity, the treated soil is carried out to the recirculation yard 96A, and the treated soil is recirculated until the acceptable capacity becomes available (see steps S300 to S320). .. As a result, it is possible to continuously perform the separation treatment of the contaminated soil without stopping the acceptance of the contaminated soil carried by the truck T, and it is possible to effectively increase the treatment amount and the landfill amount. become.

[Other]
It should be noted that the present disclosure is not limited to the above-described embodiment, and may be appropriately modified and implemented without departing from the spirit of the present disclosure.

For example, the application of the present disclosure is not limited to an intermediate storage facility for radioactively contaminated soil, but can be widely applied to separation treatment of contaminated soil generated in civil engineering and construction work.

1 Sorting processing system 10 Primary sorting section 11 Receiving and loading section (loading means)
14 Metal detection device (detection means)
15 Bag breaking processing section (bag breaking means)
17 Bag Breaking Device 20 Primary Sorting Processing Unit 22 Primary Sorting Device 30 Sorting Processing Unit 32 Sorting Device 35 Input Belt Conveyor 40 Bypass Processing Unit (Detour Processing Unit)
41 Crane device 42 Bypass yard 50 Secondary sorting part 51 Soil measurement processing part (acquisition means)
54 Soil Measuring Device 56 Pre-Distribution Processing Section 60 Reformer Addition Section (Reformer Addition Means)
61 First Modification Material Addition Device 62 Second Modification Material Addition Device 64 Later Distribution Processing Section 70 Mixing Processing Section (Mixing Means)
71, 72, 73 Crushing mixing device (crushing mixing means)
77, 78, 79 Stirrer/mixer (stirrer/mixer)
80 Secondary sorting unit (second sorting means)
84, 85, 86 Sorting device 90 Treated soil transport section 95 Sorting belt conveyor (delivery means)
96A return yard (reflux 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 (7)

A carrying-in means for receiving and carrying in a container containing at least lumped contaminated soil as a contained item;
A detection means for detecting whether or not a metallic foreign matter is mixed in the contents in the carried-in container,
Bag breaking means for breaking the container in which the metallic foreign matter is not detected by the detecting means and taking out the contents from the container,
Detour processing means for bypassing the container in which the metallic foreign matter is detected by the detection means from the bag breaking means and taking out the contained matter from the container, and for removing the metallic foreign matter from the taken-out contained matter,
The contained matter taken out by the bag breaking means and/or the contained matter in which the metallic foreign matter is removed by the bypass processing means are a first lump contaminated soil of a predetermined first size or smaller and a lump larger than the first size. A first sorting means for sorting into a product and a sorting processing system. The agglomerates separated by the first separating means are sorted into a combustible material, an incombustible material, and a second agglomerated contaminated soil of a predetermined second size or less smaller than the first size, and the sorted The separation processing system according to claim 1, further comprising a selection unit that re-inputs the second massive contaminated soil into the first separation unit. Acquisition means for acquiring an index value of water contained in the first massive contaminated soil separated by the first separation means;
Modifying means for adding a modifying material to the first massive contaminated soil based on the obtained index value;
Mixing means for generating treated soil by crushing the first massive contaminated soil to which the modifier is added and mixing with the modifier.
Second separating means for separating the treated soil generated by the mixing means into a first treated soil having a predetermined third size or less smaller than the first size and a second treated soil larger than the third size. The separation processing system according to claim 1, further comprising: The separation processing system according to claim 3, wherein the mixing unit includes a crushing/mixing unit that mixes the contaminated soil with the modifier while crushing the contaminated soil, and an agitation/mixing unit that agitates and mixes the contaminated soil with the modifier. A carrying means for carrying the first treated soil separated by the second separating means,
Intermediate storage means for receiving and temporarily storing the first treated soil transported by the transport means;
The sorting process according to claim 3 or 4, further comprising: a recirculation unit configured to recirculate the first treated soil conveyed by the conveying unit to the conveying unit according to an amount of the treated soil that can be received by the intermediate storage unit. system. Further comprising landfill status acquisition means for acquiring the landfill status of the landfill that can receive the first treated soil carried out from the intermediate storage means,
The separation processing system according to claim 5, wherein the return means returns the first treated soil conveyed by the conveying means to the conveying means according to the landfill status acquired by the landfill status acquiring means. A carry-in step of receiving and carrying in a container containing at least lumpy contaminated soil as a contained item;
A detection step of detecting whether or not a metal foreign matter is mixed in the contents in the carried-in container,
A crushing step of crushing the container in which no metal foreign matter is detected by the crushing means and taking out the contents from the container,
A bypass processing step of removing the metal foreign matter from the taken-out container while bypassing the container in which the mixing of the metal foreign matter is detected from the bag breaking means and taking out the contained object from the container;
The contents taken out in the bag breaking step and/or the contents in which the metallic foreign matters are removed in the bypass processing step are treated as a first lump contaminated soil of a predetermined first size or smaller and a lump larger than the first size. And a sorting step of sorting into a product.

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