JPH05209996A - Filter recovery device - Google Patents

Abstract

(57) [Abstract] [Purpose] Particulate radioactive materials, such as radioactive dust,
Collect the iodine trapped filter without polluting the surrounding air. [Structure] The collected filter 9B is thrown into the discharge pipe 1 by the rotary feed of the feed disc 15, dropped inside this and stored in the vinyl bag 6. When the specified number of filters 9B are accommodated, the sluice valve 2 operates to seal the passage of the discharge pipe 1, and then the vacuum pump 3 operates to open the sealed space of the discharge pipe 1 including the inside of the vinyl bag 6. Evacuate. Next, the sealing device 7
Thus, the mouth of the plastic bag 6 compressed by evacuation is sealed. Filter 9B sealed in a plastic bag 6
Is removed from the case 8 by opening a door (not shown).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of recovering a filter for collecting particulate matter, particularly a filter for collecting particulate radioactive material relating to dust / iodine sampler without polluting the surrounding air. To a possible filter recovery device.

[0002]

2. Description of the Related Art A conventional example will be described with reference to the sectional view showing the structure of FIG. In FIG. 2, the conventional example is
Along with the storage / transportation device, it is attached as a accessory to a dust / iodine sampler (not shown). This dust
Iodine samplers are used for nuclear facilities such as nuclear power plants,
Continuous measurement of radiation from radioactive dust and iodine in radioactive isotope facilities such as universities and research institutes.
For monitoring, this is a device that continuously samples the air discharged from the exhaust duct and collects radioactive dust and iodine on a filter. A feed disk 15 having a rotary shaft 16 at the center and rotatable by a motor 17 is provided in a closed space formed by the substrate 11 and the cover 12. The feed disc 15 has a plurality of circular holes formed on the same circumference, and a short cylinder filter is inserted into the circular holes and the feed disc 15 is fed with rotation. A storage cylinder 13 with a lid 14 is installed at a position above the cover 12, and a pre-collection filter 9A is stored inside the storage cylinder 13. In addition, a collected filter
A device for collecting 9B is attached. This recovery device
Discharge pipe 21 for filter 9B that is hermetically attached to substrate 11
And a storage case 22 connected to this. The case 22 includes a door (not shown) for taking out the filter 9B.

The pre-collection filters 9A pass through the circular holes of the cover 12 one by one from the storage cylinder 13, are dropped in the direction of the arrow, and are inserted into the corresponding circular holes of the feed disc 15. After the insertion, the pre-collection filter 9A is transferred together with the rotation of the feed disc 15 and mounted on the collector portion of a dust / iodine sampler (not shown). Therefore, after the radioactive dust and iodine are collected, the collected filter 9B is transferred together with the rotation of the feed disc 15, passes through the circular hole of the substrate 11 at the position shown, and is discharged in the arrow direction in the direction of the discharge pipe 21. Then, it is dropped and stored in the case 22. Collected filter 9B stored in this case 22
The door (not shown) is opened and taken out.

[0004]

In the conventional example, in order to prevent the surrounding air from being polluted by radioactive dust and iodine, each of the storage, transfer, and recovery of each filter before collection and after collection is performed. The process proceeds in an enclosed space. But,
Although the door will be opened when the collected filter 9B is finally taken out from the case 22, careful attention is paid, but some of the radioactive dust and iodine collected in the filter 9B scatter to the outside and There is a risk of contamination.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a filter for collecting particulate matter, for example, a filter for collecting particulate radioactive material related to dust / iodine sampler, to the surroundings. It is an object of the present invention to provide a filter recovery device capable of recovering the air of a filter without polluting it.

[0006]

According to a first aspect of the present invention, there is provided a filter recovery device including a passage through which a collected particulate matter trapping filter is discharged;
A bag for accommodating the filter; and a sealing means for sealing the bag in the vicinity of its mounting.

According to a second aspect of the present invention, there is provided a filter recovery device, which has a passage through which a trapped particulate matter collecting filter is discharged; and a bag which is attached to a discharge opening portion of the passage and accommodates the filter. A sealing means for sealing the bag in the vicinity of its mounting; a sluice valve for opening or sealing the passage; and a vacuum pump connected to the passage at an intermediate position between the sluice valve and the discharge opening. Prepare

According to a third aspect of the present invention, there is provided a filter recovery device according to the first or second aspect of the present invention, in which a bag for discharging a filter is attached with a discharge opening portion built in at an end thereof. Equipped with a case with a door. A filter recovery device according to a fourth aspect is the device according to any one of the first to third aspects, wherein the filter accommodation bag is made of a thermoplastic film, and the sealing means is a heat welding method.

A filter recovery device according to a fifth aspect is the device according to any one of the first to fourth aspects, wherein:
The filter is for the dust / iodine sampler collector.

[0010]

In the filter recovery device according to any one of claims 1 or 3 to 5, the collected filter is discharged through the passage and is accommodated in the bag attached to the discharge opening of the passage. At the same time, the bag is sealed by the sealing means in the vicinity of the mounting.

In the filter recovery device according to any one of claims 2 and 3 to 5, the collected filter is
The bag is discharged through the passage and is accommodated in a bag that is attached to the discharge opening of the passage, and after the passage is sealed by the sluice valve, the inside of the bag that accommodates the filter is evacuated by the vacuum pump. Then, the bag is sealed by the sealing means in the vicinity of the mounting.

In particular, in the filter recovery device according to the third aspect, the filter accommodating bag is protected by being built in the case with the door for taking in and out. Particularly, in the filter recovery device according to the fourth aspect, the filter-accommodating bag of the thermoplastic film is heat-welded and sealed by the heat-welding type sealing means.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the filter recovery device according to the present invention will be described below with reference to the sectional view showing the structure of FIG. This embodiment, together with the storage and transfer device,
It is attached as a accessory to a dust / iodine sampler (not shown). Since the storage / transportation device is the same as that in the conventional example, the same members are designated by the same reference numerals and the description thereof is omitted. The recovery device 10 of the embodiment is mainly composed of the discharge pipe 1 for discharging through the collected filter 9B.
A sluice valve 2 provided in the middle portion of the discharge pipe 1, a vacuum pump 3 connected to the middle portion between the sluice valve 2 and the lower opening of the discharge pipe 1, and a vinyl containing the collected filter 9B. The bag 6 and the case 8 that protects the plastic bag 6 by embedding the plastic bag 6 are provided on the side wall of the case 8.
And a heat-welding type sealing device 7 for sealing the mouth of the.
The discharge pipe 1 is hermetically attached to the lower surface of the substrate 11 with the axis line vertical. Attach it near the opening at the bottom of the exhaust pipe 1.
4 is provided in a convex shape, in which a plastic bag 6 and a belt 5
Is bound by.

The collected filter 9B is thrown into the discharge pipe 1 by the rotary feed of the feed disc 15 and falls through the discharge pipe 1 to be housed inside the vinyl bag 6. Specified number of filters 9B
, The sluice valve 2 operates to seal the passage of the exhaust pipe 1 as shown by the broken line, and then the vacuum pump 3 operates to evacuate the closed space of the exhaust pipe 1 including the inside of the vinyl bag 6. Pull. Next, the sealing device 7 seals the mouth of the vinyl bag 6 compressed by evacuation. Filter 9B that collects radioactive dust and iodine is a plastic bag
While not sealed, the door (not shown) is opened and the case is closed.
Taken out from 8. Even if the sluice valve 2 and the vacuum pump 3 do not necessarily evacuate, the filter 9B
Since it is taken out in a sealed state in the plastic bag 6, there is no possibility that some of the radioactive dust and iodine will be scattered outside. However, the vacuumed embodiment is more convenient because the volume of the vinyl bag 6 is compressed and the subsequent transportation process, measurement of the amount of radioactive material, and further disposal process become easier. The method that does not evacuate corresponds to claim 1, and the method of the embodiment that evacuates corresponds to claim 2.

[0015]

In the filter recovery device according to the first aspect or the third to fifth aspects, the collected filter is discharged through the passage and is attached to the bag attached to the discharge opening of the passage. While being accommodated, this bag is sealed by the sealing means in the vicinity of the mounting. Therefore, the collected filter can be collected in a sealed state in the bag without polluting the surrounding air, and the environment can be kept clean.

In the filter recovery device according to any one of claims 2 and 3 to 5, the collected filter is
The bag is discharged through the passage and is accommodated in a bag that is attached to the discharge opening of the passage, and after the passage is sealed by the sluice valve, the inside of the bag that accommodates the filter is evacuated by the vacuum pump. Then, the bag is sealed by the sealing means in the vicinity of the mounting. Therefore, the collected filter is hermetically sealed in a bag in a vacuum state and can be collected without contaminating the surrounding air, the environment can be maintained clean, and the volume of the bag containing the filter is compressed,
It facilitates subsequent transportation processing, measurement of the amount of radioactive substances, and further disposal processing.

Particularly, in the filter recovery device according to the third aspect, since the bag for storing the filter is protected by being built in the case with the door for taking in and out, the risk of damage to the bag is avoided, and the environment is cleaned. The reliability of maintenance is improved. Particularly, in the filter recovery device according to claim 4, since the bag for accommodating the filter of the thermoplastic film is heat-welded and sealed by the heat-welding type sealing means,
It can be implemented easily and at low cost.

Particularly, in the filter recovery device according to claim 5, since the filter for the collector of the dust / iodine sampler is recovered, the handling of radioactive isotopes such as nuclear facilities such as nuclear power plants and universities and laboratories. When measuring and monitoring radioactive dust and radioactive iodine in the facility, it is possible to completely prevent environmental pollution that may occur especially when collecting filters.

[Brief description of drawings]

FIG. 1 is a sectional view showing the configuration of an embodiment according to the present invention.

FIG. 2 is a sectional view showing a configuration of a conventional example.

[Explanation of symbols]

 1 Discharge Pipe 2 Gate Valve 3 Vacuum Pump 4 Mounting Part 5 Belt 6 Vinyl Bag 7 Sealing Device 8 Case 9A Filter (Before Collection) 9B Filter (Collected) 10 Recovery Device 11 Substrate 12 Cover 13 Storage Tube 14 Cover 15 Feed Disc 16 Rotation axis 17 Motor

Claims (5)

[Claims] 1. A passage through which a trapped particulate matter trapping filter is discharged; a bag which is attached to a discharge opening of the passage and contains the filter; and the bag is hermetically sealed in the vicinity of the attachment. And a sealing means for controlling the filter. 2. A passage through which a trapped particulate matter trapping filter is discharged; a bag which is attached to a discharge opening of the passage and accommodates the filter; and the bag is hermetically sealed in the vicinity of the mounting. A filter for opening or closing the passage; a vacuum pump connected to the passage at an intermediate position between the valve and the discharge opening; apparatus. 3. The device according to claim 1, wherein
A filter recovery device comprising a case with a door for loading and unloading a bag, which is attached to the end of the filter discharge passage so as to have a discharge opening therein. 4. The apparatus according to any one of claims 1 to 3, wherein the filter containing bag is made of a thermoplastic film, and the sealing means is a heat-welding system. Recovery device. 5. The filter recovery device according to claim 1, wherein the filter is for a dust / iodine sampler collector.