JP2021109166A - Volume reduction system for broken bag piece, and volume reduction method - Google Patents

Abstract

To reduce a provisional placement space by improving a transport efficiency of broken bag pieces.SOLUTION: A volume reduction system for broken bag pieces generated by breaking containers 2 accommodating accommodation objects, includes compression means 54 which compresses broken bag pieces, and enclosure means 57, 60 which encloses, in a bag 75, compression bodies 71, 72 of the broken bag pieces which are compressed by the compression means 54.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a volume reduction system for bag fragments and a volume reduction method, and more particularly to a technique suitable for volume reduction of bag fragments caused by breaking a container containing contaminated soil. ..

In general, contaminated soil generated by decontamination work of radioactive substances is stored in a flexible container bag (hereinafter, simply referred to as a container), carried into an interim storage facility, taken out by breaking the container, and sorted. Is given. A bag breaking system for this type of container is disclosed in, for example, Patent Documents 1 and 2.

JP-A-2018-090315 Japanese Unexamined Patent Publication No. 2016-033485

By the way, combustible materials such as broken bag pieces generated by breaking a container are transported from an interim storage facility to an external incinerator or the like and incinerated. At this time, the broken bag pieces are enclosed in the bag body and transported, but from the viewpoint of securing a space for temporarily storing the broken bag pieces in the interim storage facility and improving the transportation efficiency, the broken bag pieces are used. It is desirable to reduce the volume of the pieces and increase the amount of encapsulation per bag. The techniques described in Documents 1 and 2 above mainly focus on breaking the bag of the container, and sufficient studies have not been made on reducing the volume of the broken bag.

The technique of the present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to reduce the temporary storage space by improving the transportation efficiency of the broken bag pieces.

The system of the present disclosure is a volume reduction system for bag pieces generated by breaking a container containing an object to be contained, and is compressed by a compression means for compressing the bag pieces and the compression means. It is characterized by comprising an encapsulation means for encapsulating the compressed body of the broken bag piece in the bag body.

Further, it is preferable to further provide a separating means for separating the object to be contained attached to the bag-breaking piece from the bag-breaking piece before the bag-breaking piece is compressed by the compression means.

Further, the encapsulation means includes an extrusion means for pushing the compressed body outward from the discharge port of the compression means and an attachment attached to the discharge port, and the attachment is continuous in the lateral direction from the discharge port. The outer peripheral surface of the frame is covered with at least the opening side peripheral surface of the bag, and the compressed body extruded from the discharge port by the extrusion means is formed inside the bag by the peripheral surface of the frame. It is preferable to provide a guide portion that leads to the guide portion and a notch portion that cuts out the upper end portion of the guide portion on the extrusion direction side.

Further, it is preferable to further provide a temporary holding means for temporarily holding at least a part of the opening side peripheral edge of the bag body to the guide portion.

Further, the guide portion is formed in a rectangular frame shape having an upper plate member and a lower plate member that are separated from each other and a pair of horizontal plate members that are separated from each other and opposed to each other, and the cutout portion is formed in a rectangular frame shape. It is preferable that the plate member is formed by diagonally cutting out the upper corner portion on the extrusion direction side.

Further, it is preferable that the peripheral surface of the guide portion inside the frame functions so as to suppress the restoration and expansion of the compressed body while guiding the compressed body into the bag body.

Further, it is preferable that the contained object is radioactively contaminated soil and the bag body has a double bag shape having an inner bag and an outer bag.

The method of the present disclosure is a method for reducing the volume of a bag fragment generated by breaking a container containing an object to be contained, and the contained object attached to the bag fragment is removed from the bag fragment. It is characterized by having a step of separating, a step of compressing the sack piece from which the contained object is separated, and a step of sealing the compressed body of the compressed sack piece in the bag body.

According to the technique of the present disclosure, it is possible to reduce the temporary storage space by improving the transportation efficiency of the broken bag pieces.

It is a schematic block diagram which shows the sorting processing system provided with the volume reduction system which concerns on this embodiment. It is a schematic partial cross-sectional view which shows a part of the compression packing apparatus which forms the main part of the volume reduction system which concerns on this embodiment by cutting out in the compression direction. It is a schematic partial cross-sectional view which shows a part of the compression packing apparatus which forms the main part of the volume reduction system which concerns on this embodiment cut out in the extrusion direction. It is a schematic perspective view which shows the attachment which concerns on this embodiment. It is a schematic diagram explaining the packing operation of the compressed body using the attachment which concerns on this embodiment. It is a schematic diagram explaining the packing operation of the compressed body using the attachment which concerns on this embodiment. It is a flowchart explaining the flow of the contaminated soil separation process and the volume reduction process of a broken bag piece according to this embodiment. It is a schematic perspective view which shows the attachment which concerns on other embodiment. It is a schematic perspective view which shows the attachment which concerns on other embodiment.

Hereinafter, the volume reduction system for the broken bag and the volume reduction method according to the present embodiment will be described with reference to the attached drawings. The same parts have the same reference numerals, and their names and functions are also the same. Therefore, detailed explanations about them will not be repeated.

[overall structure]
FIG. 1 is a schematic block diagram showing a sorting processing system 10 including a volume reduction system according to the present embodiment.

The sorting treatment system 10 is used, for example, in an interim storage facility for temporarily storing radioactively contaminated soil generated by decontamination work of radioactive substances. Specifically, the sorting processing system 10 includes a receiving / carrying-in unit 11, a bag breaking processing unit 15, a sorting processing unit 20, a sorting volume reduction processing unit 30, and a bypass processing unit 40. The volume reduction system of the present disclosure is configured as a part of the sorting volume reduction processing unit 30.

The receiving / carrying-in unit 11 receives the flexible container bag 2 or the like (hereinafter, simply referred to as a container) containing contaminated soil (an example of the contained object of the present disclosure) into the sorting processing system 10. Specifically, the receiving / carrying-in unit 11 includes a plurality of receiving belt conveyors 12A, 12B, 12C, an alignment belt conveyor 13, and a metal detection device 14 in this order from the upstream side.

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

The number of the receiving belt conveyors 12A, 12B, and 12C is not limited to the three in the illustrated example, and may be one, two, or four or more. If a plurality of receiving belt conveyors 12A, 12B, and 12C are provided, the container 2 can be received from a plurality of trucks T at the same time, and the receiving efficiency can be improved. Further, the receiving method of the container 2 is not limited to the dump-up of the truck T, and the container 2 may be received by lifting and lowering the container 2 by a heavy machine (not shown) or the like.

The alignment belt conveyor 13 conveys the container 2 charged 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 capable of detecting the position information of the container 2 dropped on the upper surface of the alignment belt conveyor 13 and an alignment mechanism 13B for automatically aligning the containers 2. ing. The alignment mechanism 13B is 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. Are automatically aligned sequentially.

The metal detection device 14 is, for example, an electromagnetic induction type or a 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 metal foreign substances such as gas cylinders and reinforcing bars are 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 unit 15 on the downstream side, and the container 2B in which the metal foreign matter is detected by the metal detection device 14 is subjected to the bag breaking treatment. Instead of being sent to the unit 15, it is sent to the bypass processing unit 40, which will be described later.

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, damage to the bag breaking device 17, which will be described later, can be effectively done. 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, and may be provided on the receiving belt conveyors 12A, 12B, and 12C, respectively. 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 the equipment cost can be reduced.

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

The loading belt conveyor 16 loads the container 2A received from the alignment belt conveyor 13 into the bag breaking device 17 without metal foreign matter mixed in the contents. The bag breaking device 17 includes at least a pair of rotating drums 18 and 19 in a housing 17A provided with an input port on the upper side and a discharge port on the lower side. The rotary drums 18 and 19 are provided with rotary cutters and the like (not shown), and the rotary drums 18 and 19 rotate in opposite directions at different rotation speeds.

That is, the container 2A charged into the housing 17A from the charging port is guided between the rotating drums 18 and 19, and is torn by the rotary cutters of the rotating drums 18 and 19 that rotate in opposite directions to the container 2A. The contents are taken out from. The broken pieces of the container 2A and the contained items (mainly incombustible materials such as lumps of contaminated soil and small stones) taken out from the container 2A are discharged ports of the housing 17A as shown by arrows A1 in the figure. It is dropped from the bottom to the loading belt conveyor 21, which will be described later. On the other hand, when the contained material contains a foreign substance such as a large concrete block, the rotary cutter reverses due to a force acting on the rotary cutter by the foreign substance. When the rotary cutter is reversed, large foreign matter is discharged from the foreign matter discharge door as shown by arrow A2 in the figure, and is sorted out from broken bag fragments, lumps of contaminated soil, and the like.

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

The loading belt conveyor 21 receives the contents taken out from 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 throws them into the sorting device 22.

The 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 its rotation axis slanted so that the inlet 24 is located above the outlet 25. In the sorting device 22, among the lumps charged from the input port 24, the lumps smaller in size than the through hole of the rotary drum 23 fall downward from the rotary drum 23, while the lumps larger in size than the through holes. Is configured to be sent out to the discharge port 25.

In the present embodiment, the diameter of the through hole of the rotating drum 23 is set to, for example, about 100 mm. That is, small-sized lumps having 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 none of them are secondary (not shown). It is sent to the sorting processing unit or the stockyard. On the other hand, lumps having an outer diameter larger than 100 mm (mainly combustible materials such as broken bag pieces of container 2A, contaminated soil adhering to broken bag pieces, and incombustible materials such as small stones) are shown in the figure. As shown by the arrow B2, the container falls from the discharge port 25 toward the sorting belt conveyor 31 of the sorting processing unit 30, which will be described later.

The sorting and volume reducing processing unit 30 includes a sorting belt conveyor 31, a sorting device 32 (an example of the separating means of the present disclosure), a compression packing device 50 (an example of the compression means and the encapsulation means of the present disclosure), and a transport belt. A conveyor 34 and a loading belt conveyor 35 are provided. The sorting device 32 and the compression packing device 50 constitute the volume reduction system of the present disclosure.

The sorting belt conveyor 31 receives the lumps and broken bag pieces having a size larger than 100 mm, which have been sorted by the sorting device 22, and conveys them to the sorting device 32.

The sorting device 32 separates the charged lumps and sack pieces into a relatively heavy incombustible material S1, a small lump (mainly a lump of contaminated soil) S2, and a relatively light sack piece. Etc. are sorted into combustible materials S3. Specifically, the sorting device 32 includes a housing-shaped main body 32A, a blower 32B provided in the main body 32A, and a swing plate 32C provided in the main body 32A. A large number of through holes (not shown) are bored in the swing plate 32C.

The main body 32A has an inlet 32D at the upper part, a first discharge port 32E at one end, a second discharge port 32F at the lower part, and a third discharge port 32G at the other end. The main body 32A and the swing plate 32C housed in the main body 32A are arranged so that one end side (first discharge port 32E side) is vertically lower than the other end side (third discharge port 32G side). It is arranged diagonally. The blower 32B is provided adjacent to the inlet 32D on the first discharge port 32E side of the inlet 32D in the main body 32A, and blows air from one end side to the other end side in the main body 32A. It is provided to be pumped.

In the sorting device 32, among the lumps and broken bag pieces thrown into the main body 32A from the input port 32D, the heavy incombustible material S1 (mainly stone or the like) is placed on one end side (first) of the main body 32A due to its own weight. 1 Discharge port 32E) (see arrow C1), and the light combustible material S3 (mainly the broken bag piece of the container 2A) is blown by the blower 32B to the other end side of the main body 32A (third discharge port 32G). (See arrow C2). The sorted combustibles S3 (mainly broken bag pieces) are put into the compression packing device 50 as shown by the arrow C3 in the figure, compressed and sealed in the bag body to be packed, and then an external incinerator or the like. It is transported to and incinerated. In this way, by compressing the combustible material S3 such as a broken bag piece with the compression packing device 50 to reduce the volume, it is possible to surely increase the amount enclosed in the bag body, and the transportation efficiency to the incinerator facility becomes possible. Will be able to improve. Further, by improving the transportation efficiency, the site area of the space for temporarily storing the combustible material S3 before compression packaging can be effectively reduced.

In addition, the sorting device 32 uses a relatively small-sized lump (mainly lump-contaminated soil or granular contaminated material separated from a broken bag piece of the container 2A) among the lumps thrown into the main body 32A from the input port 32D. Soil, etc.) S2 is sorted by passing through the through hole of the swing plate 32C. In the present embodiment, the diameter of the through hole of the swing plate 32C is set to, for example, about 50 mm.

That is, the lump S2 (including granules) having an outer diameter smaller than 50 mm is moved downward from the through hole of the swing plate 32C through the second discharge port 32F, as shown by the arrow C3 in the figure. Fall. The dropped lump S2 is received by the transport belt conveyor 34 and returned to the loading belt conveyor 21 of the sorting processing unit 20 via the loading belt conveyor 35, so that the dropped mass S2 is reloaded into the sorting device 22. In this way, the massive contaminated soil and the granular contaminated soil separated and sorted from the heavy and light objects by the sorting device 32 are re-injected into the sorting treatment unit 20, thereby leaving the contaminated soil adhering to the broken bag pieces of the container 2A. It becomes possible to process effectively without any need. Further, by separating the adhering soil from the broken bag pieces by the sorting device 32 before the compression packing by the compression packing device 50, the volume reduction rate of the broken bag pieces is higher than that in the case where the separation treatment is not performed. It will be possible to surely increase it, and it will be possible to effectively improve the encapsulation efficiency in the bag body.

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

The crane device 41 lifts the container 2B in which the metal foreign matter is detected by the metal detection device 14 and conveys the container 2B 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) or the like. The heavy machine 43 takes out the contained object S4 from the container 2B by breaking the container 2B carried into the bypass yard 42 by the crane device 41. As shown by the arrow D1 in the figure, the broken bag piece of the container 2B is put into the compression packing device 50 to reduce its volume, and after being compressed and packed, it is transported to an external incinerator or the like for incineration.

Metallic foreign matter S5 such as a gas cylinder and a reinforcing bar is removed from the contained object S4 taken out to the bypass yard 42. The metal foreign matter S5 may be removed by 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 to the loading belt conveyor 35 by the heavy machine 44, and is loaded into the sorting device 22 via the loading belt conveyor 21 of the sorting processing unit 20. ing.

In this way, the container 2B in which the metal foreign matter is mixed in the contained material is processed by the bypass processing unit 40 that bypasses the bag breaking device 17, so that the bag breaking device 17 and the loading belt conveyor 21 caused by the metal foreign matter are treated. It is possible to prevent damage before it happens. Further, by preventing the bag breaking device 17 from being damaged, it is possible to effectively prevent the treatment of contaminated soil from being stopped due to the damage.

[Compression packing device]
Next, the details of the compression packing device 50 and the attachment 60, which form the main parts of the volume reduction system according to the present embodiment, will be described with reference to FIGS. 2 to 6.

FIG. 2 is a schematic partial cross-sectional view showing a part of the compression packing device 50 according to the present embodiment cut out in the compression direction, and FIG. 3 shows a part of the compression packing device 50 according to the present embodiment. It is a schematic partial cross-sectional view which is cut out in the extrusion direction.

The compression packing device 50 can move forward and backward in the hopper 51 into which the broken bag piece 70 (see FIG. 2) is inserted by a heavy machine (not shown), the compression chamber 52 provided below the hopper 51, and the compression chamber 52. A compression hydraulic cylinder 54 (see FIG. 2) having a pressing block 53 (see FIG. 2), a discharge chamber 55 extending in a direction substantially orthogonal to the compression chamber 52, and an extrusion block 56 (see FIG. 2) that can move forward and backward in the discharge chamber 55. It includes an extrusion hydraulic cylinder 57 (see FIG. 3) having (see FIG. 3) and an attachment 60 (see FIG. 3) attached to a discharge port 55A (see FIG. 3) that communicates with the discharge chamber 55. The compression hydraulic cylinder 54 is preferable as an example of the compression means of the present disclosure, and the extrusion hydraulic cylinder 57 is preferable as an example of the extrusion means of the present disclosure. Further, the extrusion hydraulic cylinder 57 and the attachment 60 are preferable as an example of the sealing means of the present disclosure.

In the following description, the lateral direction in which the broken bag piece 70 is compressed by the compression hydraulic cylinder 54 is simply the X direction, and the lateral direction (extrusion direction) orthogonal to the X direction is simply orthogonal to the Y direction, the X and the Y direction. The vertical direction is simply referred to as the Z direction.

The hopper 51 is formed in a substantially pyramidal trapezoidal shape in which the upper end opening is expanded from the lower end opening. A mirror 51A for projecting the inside of the hopper 51 is provided above the hopper 51 so that the operator of the heavy equipment can efficiently pack the broken bag piece 70 while visually observing the mirror 51A. The mechanism for projecting the inside of the hopper 51 is not limited to the mirror 51A, and may be a camera or the like that transmits an captured image to a monitor arranged in the cabin of a heavy machine in real time.

The compression chamber 52 is formed in a hollow shape having a substantially rectangular cross section, and communicates with the lower end opening of the hopper 51 via the inlet 52A (see FIG. 2). An input door 52B (see FIG. 2) that closes or opens the input port 52A is provided on the upper surface of the main body 50A of the compression packing device 50 so as to be slidable in the X direction. The charging door 52B opens the charging port 52A when the bag breaking piece 70 is charged from the hopper 51 into the compression chamber 52, and closes the charging port 52A when the compression hydraulic cylinder 54 operates.

The pressing block 53 is preferably formed in a rectangular block shape having substantially the same cross-sectional shape as the compression chamber 52, and a rod 54A of the compression hydraulic cylinder 54 is fixed to the back surface thereof. When oil is supplied to a pressure chamber (not shown) of the compression hydraulic cylinder 54 with the input port 52A closed, the rod 54A strokes accordingly, and the pressing block 53 pushes the bag piece 70 in the compression chamber 52. By pressing, the compressed body 71 _{_1} of the broken bag piece 70 is generated.

After the compressed body 71 _{_1} is generated, the pressing block 53 is returned to the initial position S to open the charging port 52A, and the next broken bag piece 70 is charged from the hopper 51 into the compression chamber 52 to open the charging port 52A. By closing and operating the compression hydraulic cylinder 54, the next compressed body 71 _{_2} is generated. By repeating this an appropriate number of times, a substantially cubic compressed aggregate 72 formed by pressure _{contacting a plurality of compressed bodies 71_n is generated.}

The discharge chamber 55 is formed in a hollow shape having a substantially rectangular cross section, and communicates with the compression chamber 52. At one end of the discharge chamber 55, a substantially rectangular discharge port 55A (see FIG. 3) that opens on the side surface of the main body 50A is provided. The discharge port 55A is closed or opened by a discharge door 55B (see FIG. 3) provided in the main body 50A so as to be slidable in the Z direction. In the illustrated example, the discharge chamber 55 extends in the Y direction orthogonal to the compression chamber 52, but may extend in the same X direction as the compression chamber 52. In this case, a door that separates the compression chamber 52 and the discharge chamber 55 may be provided when the compression hydraulic cylinder 54 is operated (when the bag breaking piece 70 is compressed).

The extrusion block 56 is preferably formed in a block shape smaller than the cross-sectional shape of the discharge chamber 55, and the rod 57A of the extrusion hydraulic cylinder 57 is fixed to the back surface opposite to the discharge port 55A. When flood control is supplied to a pressure chamber (not shown) of the extrusion hydraulic cylinder 57 with the discharge port 55A open, the rod 57A strokes accordingly, and the extrusion block 56 pushes out the compression assembly 72. The compression assembly 72 is sent out from the discharge port 55A to the attachment 60.

[attachment]
FIG. 4 is a schematic perspective view showing the attachment 60 according to the present embodiment.

As shown in FIG. 4, the attachment 60 includes a guide portion 61, a notch portion 66, and a band member 68 (an example of the temporary holding means of the present disclosure).

The guide portion 61 is formed in a rectangular frame shape having substantially the same shape as the discharge port 55A, and is continuous from the discharge port 55A in the Y direction. Specifically, the guide portion 61 includes an upper plate member 62 and a lower plate member 63 that are separated and opposed to each other in the Z direction, and a pair of horizontal plate members 64 and 65 that are separated and opposed to each other in the X direction. Each of these plate members 62, 63, 64, 65 is fixed by joining adjacent edges to each other by welding or the like, or by fastening with bolts and nuts.

A compression assembly 72 extruded in the Y direction by the extrusion hydraulic cylinder 57 (see FIG. 3) is sent into the rectangular hollow space E defined by the plate members 62, 63, 64, 65 of the guide portion 61. Is done. The guide portion 61 is attached to the main body portion 50A so that a predetermined height H is secured in the Z direction between the lower plate member 63 and the ground G. The predetermined height H is preferably about half the length of the compressed assembly 72 in the Y direction. The predetermined height H can be appropriately set within a range in which the height required for the compression assembly 72 to reverse due to its own weight can be secured during the reversing operation described later.

The upper plate member 62 and the lower plate member 63 are formed to have the same length in the X direction. Further, the length of the upper plate member 62 in the Y direction is formed to be shorter by a predetermined amount L than the length of the lower plate member 63 in the Y direction by providing the notch portion 66 described later. In the present embodiment, the predetermined amount L is preferably about half the length of the compressed aggregate 72 in the Y direction. The inner peripheral surfaces of the upper plate member 62 and the lower plate member 63 function as guides for smoothly sliding and moving the compression assembly 72 in the Y direction while suppressing the restoration and expansion of the compression assembly 72 in the Z direction.

The pair of horizontal plate members 64, 65 are formed to have the same length in the Y direction. The upper end edges of the horizontal plate members 64 and 65 have a length equivalent to the length of the upper plate member 62 in the Y direction, and the lower end edges of the horizontal plate members 64 and 65 have the same length as the length of the lower plate member 63 in the Y direction. It is formed by length. The inner peripheral surfaces of the horizontal plate members 64 and 65 function as guides for smoothly sliding and moving the compression assembly 72 in the Y direction while suppressing the restoration and expansion of the compression assembly 72 in the X direction.

The outer peripheral surfaces of the plate members 62, 63, 64, and 65 are covered with the opening-side peripheral edges of the bag body 75. The band member 68 temporarily holds the bag body 75 to the guide portion 61 by pressing the opening side peripheral edge of the bag body 75 against the rectangular outer peripheral surface of the guide portion 61 with a predetermined tightening force.

Specifically, the band member 68 guides the opening side peripheral edge of the bag body 75 while the compression assembly 72 is pushed into the bag body 75 by the operation of the extrusion hydraulic cylinder 57 (see FIG. 3). Hold on. This makes it possible to reliably inflate the bag body 75 without using a blowing means or the like that sends air into the bag body 75. Further, the work of pushing and sealing the compression assembly 72 into the bag body 75 can be effectively performed by the stroke force of the extrusion hydraulic cylinder 57 without using heavy machinery or human power.

Further, when the compression assembly 72 reaches the bottom of the bag body 75 by the operation of the extrusion hydraulic cylinder 57 (see FIG. 3) and the bag body 75 starts to move in the Y direction, the band member 68 is bagged. It is attached with a tightening force that allows it to move integrally with the body 75 (or move relative to the guide portion 61). This makes it possible to effectively prevent the inversion operation of the compression assembly 72, which will be described later, from being hindered by the band member 68.

The cutout portion 66 is provided by diagonally cutting out the upper end corner portion of each of the horizontal plate members 64 and 65 on the Y direction side. Specifically, the cutout portion 66 includes a pair of inclined edges 64A and 65A in which the corner portions of the horizontal plate members 64 and 65 are cut out linearly and diagonally, respectively, and the end of the upper plate member 62 on the Y direction side. It is formed by the edge 62A, and is configured to open the upper part of the lower plate member 63 over a predetermined amount L.

That is, when the compression assembly 72 was sent out from the upper plate member 62 in the Y direction and about half of the compression assembly 72 protruded from the edge 63A of the lower plate member 63 in the Y direction, the upper part was opened. The compression assembly 72 rotates around the edge 63A of the lower plate member 63 as a fulcrum due to its own weight. As a result, the compression assembly 72 can be integrally inverted with the bag body 75 by its own weight without using a rotating device that separately requires an actuator or the like. Further, by forming the notch 66 diagonally, it becomes possible to continuously apply lateral pressure to the compression assembly 72 during the reversing operation by the pair of horizontal plate members 64 and 65, and the compression assembly 72 can be continuously applied. It becomes possible to effectively prevent the lateral restoration of.

[Packing operation]
Next, the packing operation of the compression assembly 72 using the attachment 60 according to the present embodiment will be described with reference to FIGS. 5 and 6.

FIG. 5A is a schematic view illustrating the first step. In the first step, the outer periphery of the guide portion 61 of the attachment 60 is covered with at least the opening side peripheral edge of the bag body 75. In the present embodiment, the bag body 75 has a double bag shape having an inner bag and an outer bag, and diffuses the radioactively contaminated soil remaining in the compression aggregate 72 (residually adhering to the broken bag pieces) during transportation. It can be effectively prevented. The bag body 75 may cover the guide portion 61 in the order of the inner bag to the outer bag, or the inner bag and the outer bag may be covered on the guide portion 61 at the same time. When the bag body 75 is put on the guide portion 61, the process proceeds to the second step.

FIG. 5B is a schematic view illustrating the second step. In the second step, the band member 68 is wound around the guide portion 61 to temporarily hold the opening side peripheral edge of the bag body 75 on the guide portion 61. When the bag body 75 is temporarily held by the band member 68, the discharge port 55A is opened and the extrusion hydraulic cylinder 57 is operated to shift to the third step.

FIG. 5C is a schematic view illustrating the third step. In the third step, the compression assembly 72 extruded by the extrusion hydraulic cylinder 57 is guided into the bag body 75 while being slid by the guide portion 61, so that the compression assembly 72 is pushed and sealed in the bag body 75. Start. At this time, the bag body 75 is sequentially expanded by the compression assembly 72 without sliding in the Y direction while the peripheral edge on the opening side is held by the band member 68 by the guide portion 61.

That is, the bag body 75 can be easily inflated by the operation of the extrusion hydraulic cylinder 57 without using a blowing means or the like. Further, since the compression assembly 72 is directly pushed into the bag body 75 from the guide portion 61 and sealed, the restoration of the compression assembly 72 is surely suppressed without binding the PP band, and the encapsulation work is performed. It will also be possible to simplify. Further, since the PP band and the binding device are not required, it is possible to eliminate the increase in size and cost of the device, and the malfunction of the device due to the biting of foreign matter. When the compression assembly 72 reaches the bottom of the bag body 75, the process proceeds to the fourth step.

FIG. 6A is a schematic view illustrating the fourth step. In the fourth step, the compression assembly 72 pushed into the bag body 75 by the extrusion hydraulic cylinder 57 is sent out from the upper plate member 62 of the guide portion 61 in the Y direction to open the upper part of the compression assembly 72. Further, about half of the compression assembly 72 is projected in the Y direction from the lower plate member 63 of the guide portion 61. Then, as shown in FIG. 6B, the compression assembly 72 is integrally rotated with the bag body 75 by its own weight, so that the compression assembly 72 is inverted so that the opening of the bag body 75 faces upward and the ground. It will land on G.

That is, the bag body 75 in which the compression assembly 72 is enclosed can be reliably inverted by its own weight without using a rotating device operated by a heavy machine, human power, an actuator, or the like. As a result, even if earth and sand or the like remain attached to the compressed body 71, the packing operation can be reliably performed. In addition, it is possible to simplify the packing work and to improve the work efficiency. Further, since a heavy machine and a rotating device are not required, it is possible to effectively suppress an increase in size and cost of the device. In addition, since no human power is required, it is possible to ensure the safety of the packing work.

[Separation processing and volume reduction method]
Next, the flow of the contaminated soil separation treatment and the volume reduction treatment of the broken bag pieces according to the present embodiment will be described with reference to the flowchart of FIG. 7.

In step S100, the receiving / carrying-in unit 11 receives the container 2 that is thrown in and dropped by the dump-up of the truck T and conveys it to the alignment belt conveyor 13.

In step S110, the metal detection device 14 detects whether or not metal foreign matter is mixed in the contents in the container 2. If no metal foreign matter is mixed in the contained material (No), the process proceeds to the bag breaking process in step S120. On the other hand, if a metallic foreign substance is mixed in the contained material (Yes), the process proceeds to the bypass process in step S130 and subsequent steps.

In step S120, the container 2A containing no metal foreign matter is put into the bag breaking device 17, and the container 2A is taken out. Next, in step S150, the contained material (including the broken bag piece of the container 2) is charged into the sorting device 22.

On the other hand, in step S130, the container 2B containing a metallic foreign substance in the contained object is carried into the bypass yard 42, and in step S132, the container 2B is taken out by breaking the bag with a heavy machine or the like. Metallic foreign substances such as gas cylinders and reinforcing bars selected by a heavy machine or the like in step S140 (Yes) are transported to an external processing facility by being loaded on a truck or the like in step S142. In step S145, the broken pieces of the container 2B sorted by a heavy machine or the like (Yes) are sent to the temporary storage space of step S230, which will be described later. On the other hand, in step S145, the contained material (mainly, massive contaminated soil) other than the broken bag pieces is sent to the sorting device 22 in step S150 (No).

In step S150, the contents taken out from the containers 2A and 2B are put into the sorting device 22, and in step S160, a small-sized massive contaminated soil having an outer diameter of 100 mm or less and a massive contaminated soil having an outer diameter larger than 100 mm. Separate items (including broken bag pieces). Small-sized massive contaminated soil with an outer diameter of 100 mm or less is sent to a secondary sorting process or a stockyard. On the other hand, lumps having an outer diameter larger than 100 mm, broken bag pieces, and the like are sent to the sorting and volume reducing treatment in step S200 and subsequent steps.

In step S200, lumps and sack pieces having an outer diameter larger than 100 mm are put into the sorting device 32, and a heavy incombustible material, a combustible material such as a light sack piece, and an outer diameter of 50 mm are used. Sort into the following small-sized lumps (mainly contaminated soil separated from broken bag pieces, etc.). In step S210, the small-sized contaminated soil (Yes) having an outer diameter of 50 mm or less returns to step S150 and is re-injected into the sorting device 22. By re-injecting the contaminated soil separated and sorted from the heavy and light objects by the sorting device 32 into the sorting device 22 in this way, the contaminated soil adhering to the broken bag pieces of the container 2A is effectively removed. You will be able to collect it. Further, by removing the contaminated soil adhering from the broken bag piece, the volume reduction in step S240, which will be described later, can be improved.

On the other hand, the lumps having an outer diameter larger than 50 mm selected in step S210 are (No), and in step S220, combustibles such as broken bag pieces (Yes) and incombustibles such as stones (No). Is sorted into. The incombustible material is transported to an external processing facility by loading it on a truck or the like in step S260. On the other hand, combustible materials such as broken bag pieces are temporarily temporarily placed in the temporary storage space in the interim storage facility in step S230.

Next, in step S240, the broken bag pieces are put into the compression packing device 50, the volume is reduced, and the bag pieces are sealed in the bag body 75 for compression packing. In step S250, the compressed bag pieces are transported to an external incinerator by loading them on a truck or the like. In this way, by reducing the volume of the broken bag pieces of the containers 2A and 2B by the compression packing device 50 and enclosing them in the bag body 75, the encapsulation amount per bag body 75 is not reduced. It is possible to increase the number from 10 containers / bag to about 20 to 30 containers / bag. As a result, the transportation efficiency to the incineration facility can be surely improved, and the site area of the temporary storage space in the interim storage facility can be effectively reduced.

[others]
The present disclosure is not limited to the above-described embodiment, and can be appropriately modified and implemented without departing from the spirit of the present disclosure.

For example, in the flowchart shown in FIG. 7, the broken bag piece of the container 2B broken in the bypass yard 42 has been described as being sent from step S145 to the temporary storage space of step S230, but the broken bag piece of the container 2B is described. May be configured to be charged into the sorting device 32 in step S200 from step S145. By doing so, the contaminated soil adhering to the broken bag piece of the container 2B can be effectively separated and treated, and the volume reduction can be further improved.

Further, the cutout portion 66 of the attachment 60 is formed diagonally in a straight line, but as shown in FIG. 8, the cutout portions 66 of the horizontal plate members 64 and 65 are formed by cutting out in a semicircular shape. You may. Further, the temporary holding means is not limited to the band member 68, and may be a jig such as a clamp attached to the guide portion 61 or the main body portion 50A.

Further, the shape of the guide portion 61 is not limited to the rectangular frame shape, and depending on the shape of the compressed assembly 72 and the compressed body 71 and the opening shape of the discharge port 55A, for example, a cylindrical shape as shown in FIG. , Can be changed as appropriate.

Further, the application of the present disclosure is not limited to the volume reduction of the broken bag pieces of the container 2 containing the radioactively contaminated soil, but also the volume reduction of industrial waste generated at the site of civil engineering and construction work, or the disposal thereof. It can be widely applied to the volume reduction of broken bag pieces of containers containing things.

2 Container 30 Sorting volume reduction processing unit 32 Sorting device (volume reduction system)
50 Compression packing device (volume reduction system)
51 Hopper 52 Compression chamber 53 Pressing block 54 Hydraulic cylinder for compression (compression means)
55 Discharge chamber 55A Discharge port 56 Extrusion block 57 Extrusion hydraulic cylinder (filling means, extrusion means)
60 attachment (encapsulation means)
61 Guide part 62 Upper plate member 63 Lower plate member 64, 65 Horizontal plate member 66 Notch part 68 Band member (temporary holding means)
70 Fragmented bag piece 71 Compressed body 72 Compressed aggregate 75 Bag body

Claims (8)

It is a volume reduction system for broken bag pieces caused by breaking the container containing the items to be contained.
A compression means for compressing the broken bag pieces and
A volume reduction system comprising: an encapsulation means for enclosing a compressed body of the sack-breaking piece compressed by the compression means in the bag body. The volume reduction according to claim 1, further comprising a separating means for separating the contained object attached to the bag piece from the bag piece before the bag piece is compressed by the compression means. System. The encapsulation means
Includes an extrusion means that pushes the compressed body outward from the discharge port of the compression means, and an attachment attached to the discharge port.
The attachment is
The cover is formed in a frame shape continuous from the discharge port to the outside of the compression means, the outer peripheral surface of the frame is covered with at least the opening side peripheral surface of the bag body, and is extruded from the discharge port by the extrusion means. A guide portion that guides the compressed body into the bag body by the peripheral surface inside the frame, and
The volume reduction system according to claim 1 or 2, further comprising a notch portion having an upper end portion on the extrusion direction side of the guide portion notched. The volume reduction system according to claim 3, further comprising a temporary holding means for temporarily holding at least a part of the opening side peripheral edge of the bag body to the guide portion. The guide portion is formed in a rectangular frame shape having an upper plate member and a lower plate member that are separated from each other and opposed to each other, and a pair of horizontal plate members that are separated from each other and opposed to each other.
The volume reduction system according to claim 3 or 4, wherein the cutout portion is formed by obliquely cutting out an upper corner portion on the extrusion direction side of the horizontal plate member. The aspect according to any one of claims 3 to 5, wherein the peripheral surface of the frame body of the guide portion functions to suppress the restoration and expansion of the compressed body while guiding the compressed body into the bag body. Volume reduction system. The volume reduction system according to any one of claims 1 to 6, wherein the contained material is radioactively contaminated soil, and the bag body has a double bag shape having an inner bag and an outer bag. It is a method of reducing the volume of broken bag pieces caused by breaking the container containing the contents.
A step of separating the contained object attached to the bag piece from the bag piece,
The step of compressing the sack pieces from which the contents are separated, and
A volume reduction method comprising a step of enclosing a compressed body of the compressed bag piece in the bag body.

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