JPH10300891A - Method of recovering solid waste and equipment therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the working efficiency of granulation and recovery of a stored solid waste by lifting down and operating a crusher to crush the solid waste, and recovering the crushed Waste after temporarily storing it in a position above the crusher. SOLUTION: A crusher 3 is suspended by a lifting means 2, a shielding vessel S is mounted on the crusher 3 with an intake port 31 downward, and lifted down into a dry storage box B, and the intake port 31 is set over a solid waste D. The crusher 3 is operated, and the solid waste D near the inner part of the intake port 31 is bitten and finely crushed by the rotation of a crushing cutter 32. A crushed waste F is stored in the shielding vessel S in a prescribed quantity, the crusher 3 and the shielding vessel, S are rotated about 180 deg., and the crushed waste F is housed in the shielding vessel S. The crusher 3 is separated from the shielding vessel S, lifted up by the lifting means 2, removed from the dry storage box B, and housed in a cask 1. According to this method, the solid waste can be surely recovered, and the efficiency of its granulating and recovering works can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for collecting solid waste.

[0002]

2. Description of the Related Art Solid waste generated in facilities related to nuclear power plants is sequestered and stored according to radiation levels. For miscellaneous solid waste and spent fuel rod cladding, etc.
If necessary, shear by shearing or cutting cutters, sort useful metals and store them in storage containers (for example, hull cans), etc., and immerse them in pool water in a storage room isolated from the living environment to release radiation. While reducing
The decay heat of radioactive materials is removed.

[0003] Among the above-mentioned solid wastes, there are relatively solid wastes as compared with other solid wastes. Solid waste is mainly a jug used as an instrument for physics and chemistry experiments and a jug storage container for storing the jugs in units of several hundreds, and the bottom major axis and the height are several cm to several tens c.
m. After the experiment, these are temporarily stored in a dry storage (storage) as a waste jug and a waste jug storage container. Since the jug is mainly formed of polyethylene or neoprene rubber, and the jug container is mainly formed of high-density polyethylene, it is considered that incineration is possible.

[0004]

However, when taking out the waste jug and the waste jug storage container from the dry storage to the outside, for example, it is preferable to refill the container in a shielding container and seal it, but there are technical difficulties. In addition to ensuring the safety against radiation leakage during the taking-out work, the working area is limited, so that it is necessary to consider simplification of the working process, simplification of equipment, and efficiency of the work.

[0005] The present invention has been made in view of such problems, and achieves the following objects. Ensure recovery of stored solid waste. To improve the efficiency of storage solid waste fragmentation and recovery. Suppress the addition and expansion of new equipment when implementing the subdivision work of stored solid waste. Ensure safety against radiation leakage during collection and fragmentation of stored solid waste. To reduce the processing cost of stored solid waste.

[0006]

In order to recover solid waste stored in a dry storage, a crusher is suspended from a cask by a lifting means, and the crusher is operated to add solid waste. This is crushed into crushed waste. A technique of temporarily storing the crushed waste at a position above the crusher and collecting the crushed waste as crushed waste is employed. In this case, the crushing machine is turned over, the shielding container is placed downward on the crushing machine, and the crushing waste is temporarily stored in the shielding container. The technique of storing in a shielding container is applied. Alternatively, crushed waste is temporarily stored in the upper storage section of the crusher, and the upper opening of the storage section is closed with a damper. The technique of storing an object in a shielding container is also applied. The crushing machine is provided with a hanging frame for lifting the whole, and the storage section supported by the tilting shaft on the hanging frame is turned 180 ° by the operation of the turning means to take out the crushed waste. Is performed.
The shielding container storing the crushed waste is separated from the crusher, temporarily placed in a dry storage, and the shielding container is covered with an upper lid by lid fastening means and hermetically sealed. In the event that a hollow is created by the collection of solid waste, a self-propelled robot is suspended by the lifting means, and the solid waste around the hollow is collected in the hollow by the self-propelled robot. Is done. Subsequently, the solid waste in the dry storage is sequentially collected by the method described above.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a solid waste recovery method and equipment according to the present invention will be described below with reference to FIGS. In each of these figures, reference symbol A denotes a wet storage (storage), B denotes a dry storage (storage), C denotes an overhead crane, D denotes solid waste, F denotes crushing waste, H denotes a transport room, L denotes a track, and S denotes a track. A shielding container (standard drum), T is a working room, 1 is a cask, 2 is a lifting means, 3 is a crusher, 4 is a manipulator, 5 is a lid fastening means, and 6 is a self-propelled robot.

[0008] In the solid waste D recovery facility in the first embodiment, as shown in FIGS. 6 to 8, two wet storages (storage) A and one dry storage (storage) B
And a work room T are connected by a transfer room H. In the transfer room H, an overhead crane C is arranged at an upper portion thereof, and a cask 1 is arranged at a lower portion so as to be able to travel by a track L.

The cask 1 has a track L in a transfer chamber H.
And has a hollow portion 12 surrounded by a radiation shielding wall 11, as shown in FIG.
A manipulator 4, a lid fastening means 5, and a self-propelled robot 6 are arranged on the lifting means 2 provided in the hollow portion 12 according to the purpose of work, and these are lowered from the lower opening 13 to perform a desired work. I am trying to implement it.

The lifting means 2 has a function of hoisting or the like, is disposed in the hollow portion 12 of the cask 1, and has a rotator 21 for permitting horizontal rotation of the manipulator 4, the lid fastening means 5 and the like. have.

As shown in FIG. 1, the crushing machine 3 includes a pair or a plurality of pairs of crushing cutters 32 disposed in the vicinity of an inlet 31 and a solid waste D disposed above the crushing cutters 32. Container (standard drum) S for temporarily storing
Shaft 33 for reversibly supporting 180 ° and the entire shaft 34 and the crusher 3 are supported for 180 ° reversal, and the lifting means 2 is detachably hung by the lifting means 2. And a suspension frame 34.

The manipulator 4 employs, for example, a beam manipulator, is attached to the lifting means 2 in a suspended state, and has a hoist 41 provided below.

The lid tightening means 5 is replaced with the crusher 3
As shown in FIG. 4, it is attached to the lifting means 2 in a suspended state, has a function of covering the shielding container S with the upper lid 5a, and sealing the container with bolts or the like. And a function having a function of lifting the shielding container S with the upper lid 5a covered and holding the shielding container S as it is to the transfer chamber H, and a function of releasing the portion gripped by the upper lid 5a and releasing the shielding container S after lifting. .

As shown in FIG. 5, the self-propelled robot 6 is suspended in the dry storage B by the lifting means 2 and travels on the stacked solid waste D by remote control. And a robot function for grasping and moving the position of the solid waste D.

Hereinafter, the operation of collecting solid waste will be described with reference to FIGS.

[Installation of crusher] As shown in FIG. 1, the crusher 3 is hung by the lifting means 2, and the shielding container S with the intake port 31 facing downward and the crusher 3 facing downward. It is attached, suspended in the dry storage B, and installed so that the intake 31 covers the solid waste D.

[Crushing and Storage of Solid Waste] Crusher 3
Is operated to solidify the solid waste D near the inside of the intake port 31 with the rotation of the crushing cutter 32 and crush finely. The crushed waste F formed by the crushing is sent to the shielding container S and temporarily stored. After storing a predetermined amount of the crushed waste F in the shielding container S as shown by the arrow in FIG. 2, the crusher 3 and the shielding container S are rotated by 180 ° as shown by the arrow in FIG. It is stored in the shielding container S.

[Separation of Crusher and Shielding Container] FIG. 3
As shown in, the crusher 3 is separated from the shielding container S,
It is lifted by the lifting means 2, removed from the dry storage B, and stored in the cask 1. Separated shielding container S
Is left on the solid waste D.

[Replacement of crusher with lid fastening means] Crusher 3
Is transported to the work room T by the cask 1 and the lid fastening means 5 is stored in the cask 1 instead of the crusher 3, and the lid fastening means 5 is moved by the lifting means 2 into the dry storage B as shown in FIG. Hang it down.

[Sealing of the Shielding Container] By the operation of the lid fastening means 5, the shielding container S is put in a sealed state by, for example, covering the upper lid 5a and tightening bolts.

[Unloading of the Shielding Container] The shielding container S in a sealed state is lifted by the lifting means 2 and transported to the work room T by the traveling of the cask 1.

[Conveyance of Self-Propelled Robot] When the solid waste D immediately below the lifting means 2 is continuously collected, a hollow K is formed at the center of the solid waste D or the like. Therefore, as shown in FIG. 5, the manipulator 4 and the self-propelled robot 6 are suspended and carried by the lifting means 2. In this case,
Self-propelled robot 6 by hoist 41 of manipulator 4
And hang it down to the concave portion K. The manipulator 4 is also used when the self-propelled robot 6 is attached to and detached from the hoist 41.

[Accumulation of solid waste] The manipulator 4 and the self-propelled robot 6 are operated in parallel by lowering the self-propelled robot 6 into the recess K and performing remote control. The waste D is accumulated in the depression K.

[Repetition of Collection Operation] The crushing or accumulation and collection operation of the solid waste D shown in FIGS.
The process is repeated until the solid waste D is no longer present in the dry storage B. However, the self-propelled robot 6 temporarily suspends the dry waste B in a corner or the like of the dry storage B so that the crushed waste F and the shielding container S can be removed. Interference with work such as unloading can be avoided.

Next, based on FIG. 9 and FIG. 10, the second embodiment of the solid waste recovery method and its equipment according to the present invention will be described.
An embodiment will be described. In the second embodiment, a crusher 3 having a storage unit 35 and a damper 36 is applied instead of the shielding container S.

As shown in FIGS. 9 and 10, the crushing machine 3 includes a storage section 35 for temporarily storing the crushed waste F on the crushing cutter 32, and a damper 36 for opening and closing an opening 35a of the storage section 35. And a reversing means 37 for reversing the positions of the intake port 31, the storage section 35 and the damper 36 by 180 ° about the tilt axis 33 as the center of rotation.

In the crushing machine 3, the intake 31 is covered with the solid waste D, and the crushing cutter 32 is rotated by the rotating shaft 32a to add the solid waste D and crush it to obtain the crushed waste F. , The opening 35a by the damper 36
Is closed and the crushed waste F is temporarily stored in the storage section 35, and when the storage amount reaches a predetermined storage amount, the crushed waste F is lifted by the lifting means 2 and discharged from the dry storage B.

After being transferred to the work room T by the above-described cask 1, the reversing motor 37a in the reversing means 37 is used.
Is transmitted to the worm mechanism 37c via the reversing speed reducer 37b, and the storage portion 3 supported by the tilt shaft 33 is rotated.
5 is turned 180 °, the opening 35a is turned downward, the opening 35a is positioned in the shielded container that has been put on standby, and the storage unit is moved via the damper drive shaft 36b by the operation of the damper drive motor 36a. By opening and closing 35, the crushed waste F is paid out and stored in the shielding container S.

Thereafter, the sealing with the upper lid 5a of the shielding container S, the loading of the crusher 3 into the dry storage B, the addition of the solid waste D in the 180 ° inverted state, and the crushing operation are repeated.

[0030]

According to the method and equipment for collecting solid waste according to the present invention, the following effects can be obtained. (1) The crusher is placed over the solid waste in the storage, and the crushed waste is stored at a position above the crusher, and the crushed waste is stored in a shielded container by inverting 180 °. As a result, the stored solid waste can be reliably collected. (2) The solid waste is crushed while being added thereto, and is continuously fragmented, so that the efficiency of the fragmentation and recovery of the stored solid waste can be improved. (3) By adding a crusher or a self-propelled robot directly to the storage to collect the stored solid waste, it is possible to suppress the addition or expansion of new equipment. (4) The collection of solid waste is performed in the storage, and the crushed waste is transported in a state where the opening is closed with the cover closed and the safety against radiation leakage can be ensured. . (5) By dividing and collecting the solid waste in the storage, costs at the time of collection can be reduced.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a crushing state in a first embodiment of a solid waste recovery method and equipment according to the present invention.

FIG. 2 is a front sectional view showing a reversing state of the crusher in the first embodiment of the solid waste recovery method and the equipment according to the present invention.

FIG. 3 is a front cross-sectional view showing a state in which a crusher is separated in the first embodiment of the solid waste recovery method and the equipment according to the present invention.

FIG. 4 is a front sectional view showing a state of closing a cover of a shielding container in the first embodiment of the solid waste collection method and the equipment according to the present invention.

FIG. 5 is a front cross-sectional view showing the state of accumulation of solid waste in a depression in the first embodiment of the solid waste recovery method and the equipment according to the present invention.

FIG. 6 is a plan sectional view showing a first embodiment of a solid waste recovery method and equipment according to the present invention.

FIG. 7 is a front sectional view showing a first embodiment of a solid waste recovery method and equipment according to the present invention.

FIG. 8 is a side sectional view of a cask portion in the first embodiment of the solid waste recovery method and the equipment according to the present invention.

FIG. 9 is a front sectional view showing a crusher in a second embodiment of the solid waste recovery method and the equipment according to the present invention.

FIG. 10 is a side sectional view showing a crusher according to a second embodiment of the solid waste recovery method and its equipment according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cask 2 Lifting means 3 Crusher 4 Manipulator 5 Lid fastening means 5a Upper lid 6 Self-propelled robot 11 Radiation shielding wall 12 Hollow part 13 Lower opening 21 Rotator 31 Intake port 32 Crushing cutter 32a Rotating axis 33 Tilt axis 34 Suspension frame 34a Hanging tool 35 Storage unit 35a Opening 36 Damper 36a Damper drive motor 36b Damper drive shaft 37 Reversing means 37a Reversing motor 37b Reversing reducer 37c Worm mechanism 38 Crusher motor 41 Hoist A Wet storage (storage) B Dry storage ( Storage) C Overhead crane D Solid waste F Crushed waste H Transfer room J Connection port K Depression L Track S Shielding container (standard drum) T Work room

Claims (9)

[Claims] 1. A method for recovering solid waste (D) stored in a storage (B), comprising: a step of suspending a crusher (3); and a step of operating the crusher to remove the solid waste. A step of forming a crushed waste (F) by crushing while holding it, a step of temporarily storing the crushed waste above the crusher, and a step of collecting the temporarily stored crushed waste. To collect solid waste. 2. The crushing machine (3) is turned over, the shielding container (S) is placed on the crushing machine in a downward position, and the crushing waste (F) is temporarily stored in the shielding container. Item 6. The method for collecting solid waste according to Item 1. 3. The crushing machine (3) and the shielding container (S) each have one unit.
3. The method for collecting solid waste according to claim 2, wherein the crushed waste (F) is stored in a shielded container after being turned over by 80 °. 4. The shielding container (S) containing the crushed waste (F) is separated from the crusher (3), and the shielding container is covered with an upper lid (5a) and sealed. 4. The method for collecting solid waste according to 3. 5. A self-propelled robot (6) is suspended from a hollow (K) generated by collecting solid waste (D), and solid waste around the hollow is accumulated in the hollow. The method for recovering solid waste according to claim 1, 2, 3, or 4. 6. A facility for collecting solid waste (D) stored in a storage (B), wherein the solid waste is suspended by lifting means (2) into the storage and crushed while the solid waste is being held. A waste crusher (3) and a shielding container (S) mounted on the crusher and temporarily storing the crushed waste (F) at an upper position. 7. A facility for recovering solid waste (D) stored in a storage (B), wherein the solid waste is suspended by lifting means (2) in the storage and crushed while the solid waste is being held. And a storage unit (3) provided above the crusher and temporarily storing the crushed waste (F).
5), an opening (35a) formed in the storage section for taking out crushed waste, and a damper (36) provided in the opening and capable of being opened and closed, wherein the solid waste recovery equipment is provided. . 8. A suspension frame (34) for a crusher (3).
And the storage unit (3) is attached to the suspension frame by the tilt shaft (33).
8. The solid waste recovery facility according to claim 7, further comprising a reversing means (37) for reversibly supporting (5). 9. A self-propelled robot (6) for accumulating surrounding solid waste in a depression (K) generated by collecting solid waste (D) is provided in the lifting means (2). 9. The solid waste recovery facility according to claim 6, 7, or 8.