JP2013250079A - Packaging system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently perform packaging processing of products generated when treating contaminants including radioactive substances without allowing an operator to take health risks.SOLUTION: A packaging system constituted of a filter press 1 for accepting products generated when contaminants including radioactive substances are treated and mechanically performing dehydration, a crusher 2 for accepting dehydrated cakes obtained from the filter press 1 and crushing the dehydrated cakes, a granulator 3 for accepting crushed pieces crushed by the crusher 2 and granulating the crushed pieces, and a packaging machine 4 for storing and packaging the granulated objects granulated by the granulator 3 in a flexible container bag 5 is provided.

Description

  The present invention relates to a packing system, and more particularly to a system that can efficiently pack a concentrate produced when a contaminant such as soil contaminated with radiation is purified.

Conventionally, as a method for separating and removing toxic substances from soil contaminated with toxic substances such as organic compounds and oils, for example, as shown in Patent Document 1, water is added to contaminated soil to form a slurry, and this slurry is interfaced. There is known a purification treatment method in which an activator and an alkali agent are added, and harmful substances are levitated and separated by a flotation separator to be purified.
In addition, as a purification method for contaminated soil containing radioactive substances such as cesium, which is a harmful substance adhering to and adsorbing on the surface of soil particles, a flotation treatment method for floating and separating radioactive substances is known. The present applicant has previously proposed a method for cleaning contaminated soil containing radioactive materials using a flotation process.

  In the method for purifying contaminated soil containing radioactive substances according to the above proposal, the first classification step of adding water to the contaminated soil, separating the coarse particles by wet sieving classification to form slurry-like soil, A second classification step in which hydrocyclone treatment is performed to classify the sand and fine particles containing contaminants; a cleaning step in which the sand is recovered by floss generated by flotation; and the cleaning sand in this cleaning step Extracting the radioactive substance contained in the extract with a solution of the extraction drug, and further using the radioactive substance extraction step of obtaining low-concentration low-concentration washed sand by dehydration, and the fine particles obtained in the second classification step as an adsorbent The fine particles are used to remove radioactive materials from the floss in the washing process and the treatment solution from the radioactive substance extraction process, and to coagulate and precipitate to separate into precipitated sludge and water. It is characterized by comprising the adsorption step of separating into a treated water and the concentrated residue was. In the method for purifying contaminated soil according to this proposal, a chemical such as a potassium compound is added to the washed sand obtained in the washing step, so that the extraction efficiency can be increased and the amount of the chemical added can be reduced. And the fine particles obtained in the second classification step can be reused as an adsorbent.

JP 2006-132280 A

  The method for purifying contaminated soil according to the above proposal can achieve excellent effects such as reducing the amount of chemicals used, but a concentrate is generated in the purification process, and this concentrate is generally It is processed as a dehydrated cake produced by a dehydrator such as a filter press. In the case of this concentrated dehydrated cake, there is a problem that dust is generated during handling in addition to being a radioactive substance. For this reason, it has been desired that the processing of the concentrate (dehydrated cake) can be efficiently packaged by workers without taking health risks.

  Therefore, the present invention has been made to meet the above-mentioned demands, and its purpose is to provide a concentrate produced when processing a pollutant containing a radioactive substance without an operator taking a health risk. It is another object of the present invention to provide a packing system that can efficiently perform packing processing.

  In order to achieve the above object, a packaging system according to the present invention includes a dehydrating unit that mechanically dehydrates a product generated when a pollutant containing a radioactive substance is processed, and a dehydration obtained from the dehydrating unit. A crushing means for receiving and crushing the cake, a granulating means for receiving and granulating the crushed material crushed by the crushing means, and storing the granulated material granulated by the granulating means in a container and packing it And packing means.

  In the packing system having the above-described configuration, the product generated when the pollutant is processed is mechanically dehydrated by the dehydrating means to form a dehydrated cake, and the dehydrated cake is crushed by the crushing means, and then granulated means. The granulated product is stored in a container and packed. Therefore, the product generated when the pollutant is processed is finally in the form of a granular material, so that it can be efficiently stored and processed in a container.

  Moreover, in the packing system which concerns on this invention, it is preferable to perform from the receipt of the product to a dehydrating means to the packing in a packing means fully automatically.

  Since the packaging system having the above configuration is automatically performed without the hand of the worker, the external exposure and the internal exposure of the worker can be effectively prevented in the process.

  In the packaging system according to the present invention, the dehydrating means is a filter press.

  In this case, the product generated when the contaminant is treated is mechanically dehydrated with a filter press, so that a dehydrated cake having a low water content can be obtained.

  Moreover, in the packing system which concerns on this invention, it is preferable that a granulation means adds a binder and granulates.

  In this case, since the granulated material is granulated with the addition of a binder, scattering of dust is suppressed, so that internal exposure can be prevented.

  Moreover, in the packaging system which concerns on this invention, it is preferable that the granulated material granulated by the granulation means is accommodated in a container after measurement.

  With such a configuration, a certain amount of granulated material that has been measured can be stored in the container.

  In the packaging system according to the present invention, the container is preferably a flexible container bag.

  In the packing system having the above-described configuration, the granulated material is stored in the flexible container bag, so that the granulated material can be stored in a strong and long-lasting container.

  According to the packaging system of the present invention, the product generated when the pollutant is processed is mechanically dehydrated by the dehydrating means, and the dehydrated cake obtained by the dehydration is crushed by the crushing means, and then granulated. Since the product is granulated and stored in a container and packed, the product generated when the pollutant is processed can be efficiently stored and packed in the container in the form of granular material. it can.

It is a figure which shows the flowchart of the packaging system by one embodiment of this invention.

  Hereinafter, embodiments of the packaging system of the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment, and constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same. .

  The flow chart of the packing system shown in FIG. 1 includes a filter press 1 responsible for the dehydrating means of the present invention, a crusher 2 responsible for the crushing means of the present invention, a granulator 3 responsible for the granulating means of the present invention, and the present invention. A packing machine 4 that carries packing means is included.

  The filter press 1 is configured by a known filter press that inserts a material to be dehydrated between filter cloths and performs compression dehydration. And the to-be-dehydrated substance supplied to this filter press 1 is a product produced | generated when the pollutant containing a radioactive substance is purified. An example of the product is coagulation sedimentation sludge of the coagulation sedimentation treatment apparatus in the washing treatment process of the contaminated soil containing the radioactive substance previously proposed by the present applicant (Patent Document 1 described above). Hereinafter, the to-be-dehydrated substance supplied to the filter press 1 is demonstrated by agglomeration precipitation sludge.

  The coagulated sediment sludge supplied to the filter press 1 is separated into a dehydrated cake P1 and a dehydrated liquid (that is, water) by a pressurizing operation by the filter press 1, and the water is returned to a coagulation sedimentation processing apparatus (not shown). The dewatered cake P1 is received by the hopper H1 when the filter press 1 is opened. The shape of the dewatered cake P1 varies depending on the size of the filter press 1, but usually has a plate shape of length × width × thickness of 1500 × 1500 × 40 (mm).

  The operations of receiving, pressurizing and releasing the precipitated sludge to the filter press 1 described above are automatically performed under the control of a controller such as a programmable controller (PC) without direct operation by an operator. Therefore, external exposure of workers can be effectively prevented. Here, the filter press 1 is used as the dewatering means, but other mechanical dewatering machines such as a belt press filter may be used. However, the filter press 1 can obtain an advantage that a dehydrated cake P1 having a low water content can be easily obtained by dehydration at high pressure.

  The crusher 2 is composed of a known crusher having a rotating cutter in a drum. And this crusher 2 is comprised so that the dewatering cake P1 in the hopper H1 may be received via conveyance machines C1, such as a belt conveyor. Accordingly, the dewatered cake P1 received by the crusher 2 is crushed and crushed by the rotary cutter. The crushed and crushed crushed material P2 is configured to be discharged into the hopper H2. The discharge of the crushed material P2 to the hopper H2 is performed by opening the bottom surface of the drum, but can also be performed by tilting the drum.

  Control of the controller without the operator directly operating the above-described crushing machine 2 for receiving the dewatered cake P1, crushing and crushing the dewatered cake P1 with a rotating cutter, and discharging the crushed material P2 into the hopper H2. Done automatically. Therefore, external exposure of workers can be effectively prevented.

  The granulator 3 is composed of a well-known agitation granulator having a rotating blade in a drum. And this granulator 3 is comprised so that the crushed material P2 in the hopper H2 may be received via the conveyance machine C2, and the binder which consists of quick lime etc. may be added. Therefore, the crushed material P2 received by the granulator 3 is granulated by adding rotational motion by the rotary blades. And the granulated product P3 that has been granulated is configured to be discharged into the hopper H3. The granulated product P3 is discharged to the hopper H3 by opening the bottom surface of the drum, but can also be tilted. The granulator 3 is a stirring granulator here, but may be another type of granulator such as a fluid granulator that rotates and granulates the drum itself.

  Acceptance of the crushed material P2 to the granulator 3 described above, granulation treatment by stirring of the rotor blades, and discharge of the granulated material P3 into the hopper H3 are performed by the control of the controller without direct operation by an operator. Done automatically. Therefore, external exposure of workers can be effectively prevented.

  The size of the granulated product P3 granulated by the granulator 3 is formed to have a diameter of several millimeters in consideration of the convenience of subsequent handling, and the granulated product P3 having such a size is efficiently produced. The type of binder is selected so that it is formed. In the case of the crushed material P2 resulting from the coagulation sedimentation sludge of the coagulation sedimentation processing apparatus in the cleaning of the contaminated soil containing the radioactive substance, quick lime is selected. Thereby, even if the granulated material P3 dries, generation | occurrence | production of dust can be prevented. Therefore, internal exposure due to suction of dust can be effectively prevented.

  The packing machine 4 includes a load cell L, a flexible container bag 5 formed of a sheet woven with a strong chemical fiber such as polyethylene or polypropylene, which is placed on the load cell L, and corresponds to the container of the present invention. It consists of and. The flexible container bag 5 is a flexible container bag (Flexible Containers), and is usually referred to as a “flexible container bag”, which is adopted in the present invention.

  The flexible container bag 5 is configured to receive the granulated material P3 in the hopper H3 via the transporter C3. The flexible container bag 5 is configured to store a certain amount of the granulated product P3 measured by the load cell L, and the flexible container bag 5 containing the fixed amount of granulated product P3 is stored in a predetermined storage location. It is comprised so that it may be conveyed. Moreover, after the flexible container bag 5 in which the granulated material P3 is stored is carried out from the load cell L, an empty flexible container bag 5 is set.

  The above-described packing machine 4 receives the granulated product P3, the granulated product P3 is stored in the flexible container bag 5, the flexible container bag 5 containing the granulated product P3 is carried out, and the empty flexible container bag 5 is set. It is automatically performed by the control of the controller without direct operation by the operator. Therefore, external exposure of workers can be effectively prevented.

  In the packing system having the above-described configuration, the coagulated sediment sludge of the coagulation sedimentation processing apparatus in the cleaning process of the contaminated soil containing radioactive substances is received by the filter press 1 and dehydrated, separated into the dehydrated cake P1 and water, Is returned to the coagulation sedimentation processing apparatus, and the dehydrated cake P1 is sent to the crusher 2 to be crushed and crushed. The crushed and crushed crushed material P2 is sent to the granulator 3 and granulated with the addition of a binder, and the granulated product P3 is weighed by the packing machine 4 and the flexible container bag. 5 is stored. The flexible container bag 5 storing the granulated material P3 is carried out to a storage place, and the empty flexible container bag 5 is set in the packing machine 4.

  Since the series of operations described above are performed fully automatically by the control of the controller, the worker is not exposed to external exposure, and the granulated product P3 is granulated with the addition of a binder, so that dust The internal exposure can be prevented since the scattering of water is suppressed. In addition, since the granulated material P3 stored in the flexible container bag 5 has a granular shape, it can be stored without generating a useless space in the flexible container bag 5, and is excellent in fluidity. It has the feature that it can be stored smoothly.

  In the above example, the pollutant is a radioactive substance, but it may contain other pollutants in addition to the radioactive substance, or may contain other pollutants without containing the radioactive substance. Also good. Therefore, in the present invention, the term “pollutant containing a radioactive substance” includes the case of other pollutants that do not contain a radioactive substance.

1 Filter press (dehydration means)
2 Crusher (crushing means)
3 Granulator (granulating means)
4 Packing machine (packing means)
5 Flexible container back (container)
L Load cell H1 to H3 Hopper C1 to C3 Conveyor P1 Dehydrated cake P2 Crushed material P3 Granulated material

Claims (6)

A dehydration means for receiving and mechanically dehydrating products generated when processing pollutants including radioactive materials;
Crushing means for receiving and crushing the dehydrated cake obtained from the dehydration means;
A granulating means for receiving and granulating the crushed material crushed by the crushing means;
Packing means for storing and packing the granulated material granulated by the granulating means in a container;
A packaging system comprising:   The packaging system according to claim 1, wherein the process from reception of the product to the dehydrating unit to packaging in the packaging unit is performed automatically.   The packing system according to claim 1, wherein the dehydrating unit is a filter press.   The packing system according to any one of claims 1 to 3, wherein the granulating means performs granulation by adding a binder.   The packing system according to any one of claims 1 to 4, wherein the granulated product granulated by the granulating means is stored in the container after measurement.   The packing system according to claim 1, wherein the container is a flexible container bag.

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