JPH08271691A - Adsorption tower and its carrying in/out method - Google Patents

Abstract

PURPOSE: To provide a carrying in/out method for an adsorption tower capable of easily logging and introducing an adsorption tower as sealed air-tightly from a glove box and the adsorption tower. CONSTITUTION: One opening of a cylindrical plastic bag 14 is attached in sealed state to a bag holder part 12 provided surrounding a hanging piece placed on the upper surface of an adsorption tower 1 and the other opening is attached in sealed state to a bag holder part of a glove box 3. By hanging down the adsorption tower with a hanging piece, the adsorption tower is introduced in the glove box and after its operation, the adsorption tower is hung up with the hanging piece to log out of the glove box. The plastic bag 14 is squeezed at two locations to seal below the adsorption tower and the seal part is cut in the middle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for airtightly loading and unloading an adsorption tower for adsorbing a radioactive substance, and the adsorption tower.

[0002]

2. Description of the Related Art An adsorbent for adsorbing a radioactive substance is incorporated in an adsorption tower, and the adsorbent reaches a saturated amount after a certain period of operation, and it is necessary to replace it with a new adsorption tower.
Therefore, particularly when replacing the adsorption tower that adsorbs uranium or plutonium that emits α rays, the methods shown in FIGS. 8 to 11 are used.

FIG. 8 is a side view showing the concept of loading a conventional adsorption tower into a glove box. Reference numeral 3 is a glove box for housing the adsorption tower, and the adsorption tower that has been in operation has already been unloaded. The new adsorption tower is being loaded, and the old vinyl bag 9 is used to hold the glove box 3
Is sealed. A bag holding portion 5 is provided at the adsorption tower inlet / outlet port 4 of the glove box 3.

FIG. 9 is an enlarged view of the bag holding portion 5 of the glove box 3. The bag holding portion 5 has an O ring groove 7a provided on the outer peripheral surface of the annular projection 6 and an O ring 7b.
It is constituted by being fitted. One end of the vinyl bag 8 is open, and the opening is the O-ring groove 7
It is put on the annular projection 6 having a and the vinyl bag 8 is fixed in a sealed state by the O-ring 7b.

FIG. 10 is a side view when the conventional adsorption tower 1 is loaded into the glove box 3, and when the adsorption tower 1 is loaded into the glove box 3, the adsorption tower 1 is suspended via the hanging piece 2. Hanging with the wire 10 of the lifting machine 18,
Remove the old vinyl bag 9 from the glove port 11 by removing it inside the glove box 3
Then, the adsorption tower 1 is loaded into the glove box 3, and the adsorption tower 1 is lowered onto the floor of the glove box 3 as shown in the figure.

Subsequently, the wire 10 of the lifting machine 18 is removed,
As shown by the broken line in FIG. 10, the vinyl bag 8 is squeezed through the globe port 11 and welded with a sealer or the like.
The welding section is cut to seal the adsorption tower inlet / outlet 4 of the glove box 3 in a hermetically sealed state. Glove box 3
After sealing the opening of the adsorption tower 1, the vinyl bag 8 enclosing the adsorption tower 1 is unsealed from the glove port 11 by a human hand, and moved to a predetermined adsorption tower attachment place (not shown) to fix the adsorption tower 1 and pipes. Make a connection.

FIG. 11 is a side view when the conventional adsorption tower 1 is carried out. After the operation is completed, the adsorption tower 1 is moved below the adsorption tower inlet / outlet 4, and a new vinyl bag 8 is placed in the glove box 3. The vinyl bag 8 which is fixed to the bag holding portion 5 in a sealed state and is cut when the adsorption tower 1 is carried in and seals the adsorption tower inlet / outlet 4 in a sealed state is taken out, and the adsorption tower 1 is inserted through the globe port 11 It is lifted by a human hand, wrapped in a new vinyl bag 8 and hermetically sealed, and then carried out from the glove box 3.

[0008]

However, in the above-mentioned method, there is no problem if the adsorption tower 1 is of a weight (usually several tens of kilograms) that can be lifted by a human hand, but on the order of tons. In some cases it is not possible to lift it by human hands. Therefore, it is necessary to provide the lifting machine 19 (see FIG. 11) in the glove box 3, which causes a problem that the glove box 3 becomes large.

A lifting machine 19 is installed in the glove box 3.
In the case where the above is provided, the hanging piece 2 cannot be hung by the wire 10 because it is wrapped in the vinyl bag 8 in the conventional method, and the adsorption tower 1 can be taken in and out from the glove box 3 while being hermetically sealed. There was also the problem that it was difficult. The present invention was created to solve these problems. That is, it is not necessary to provide a lifting machine in the glove box, the glove box can be downsized, and the adsorption tower can be easily put in and taken out from the glove box while hermetically sealing the adsorption tower and its adsorption method. The purpose is to provide a tower.

[0010]

According to the present invention, there is provided a method of moving an adsorption tower up and down by a hanging piece provided on an upper surface of the adsorption tower to carry the adsorption tower in and out of the glove box. One opening of the bag is hermetically fixed to a bag holder provided on the upper surface of the adsorption tower so as to surround the hanging piece, and the other opening is provided at the entrance and exit of the adsorption tower of the glove box. The adsorption tower is suspended from the adsorption tower inlet / outlet of the glove box by a hanging piece and carried into the glove box.After the operation of the adsorption tower is completed, the adsorption tower is suspended from the adsorption tower inlet / outlet of the glove box. The feature is that it is lifted up and taken out from the glove box, and the plastic bag is squeezed under the adsorption tower and is carried out in a sealed state. Loading and unloading method of the adsorption tower for is provided.

The plastic bag may be a vinyl bag. Further, according to the present invention, there is provided an adsorption tower having a bag holding portion so as to surround a hanging piece provided on the upper surface of the adsorption tower. Further, the bag holding portion may be a short cylindrical protrusion, and an O-ring groove may be provided on the outer surface thereof.

[0012]

According to the above-described method and adsorption tower of the present invention, one opening of the cylindrical plastic bag is hermetically sealed in the bag holding portion provided so as to surround the hanging piece provided on the upper surface of the adsorption tower. The other opening is hermetically fixed to the bag holding part provided at the inlet / outlet of the adsorption tower of the glove box, and the adsorption tower is hung from the inlet / outlet opening / closing of the glove box with a hanging piece. Bring the adsorption tower into the glove box, and after the operation of the adsorption tower is completed, lift the adsorption tower from the adsorption tower inlet / outlet of the glove box by hanging the wire of the lifting machine on the hanging piece and take it out to the adsorption tower inlet / outlet of the glove box. The adsorption tower can be carried out in a state where the plastic bag is squeezed under the adsorption tower and hermetically sealed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. In each figure, the same parts as those in the related art are designated by the same reference numerals, and a duplicate description will be omitted. FIG.
7 to 7 are diagrams showing a series of procedures for carrying in and out the adsorption tower 1 to and from the glove box 3.

First, the configuration of the present invention will be described with reference to FIGS.
This will be described below. Figure 1 shows adsorption tower 1 with glove box 3
It is a side view which shows the concept at the time of carrying in, and FIG. 2 is a top view of the adsorption tower 1. In the figure, 12 is a bag holding portion provided on the upper surface of the adsorption tower 1 so as to surround the hanging piece 2.

The bag holder 12 is similar to the bag holder 5 of the glove box 3 shown in FIG. Thirteen
Is an arm for fixing the adsorption tower 1 in the glove box 3, and 14 is a cylindrical vinyl bag. The vinyl bag 14 has one opening covered with a bag holding portion 12 (protrusion having an O-ring groove) of the adsorption tower 1 to be fixed in a sealed state by an O-ring, and the other opening is attached to the adsorption tower of the glove box 3. Similarly, the bag holding portion 5 provided at the doorway 4 is fixed in a sealed state.

Therefore, the adsorption tower 1 can be sealed with the vinyl bag 14 with the hanging piece 2 open.
The adsorption tower 1 can be hoisted or hung by the wire 10 of the lifting machine 18 provided outside the glove box 3. FIG. 3 is a side view when the adsorption tower 1 is loaded into the glove box 3. In the figure, 15 is an arm holder for fixing the arm 13 of the adsorption tower 1 carried into the glove box 3, and 16 is an adsorption tower fixing base for stably fixing the adsorption tower 1.

The adsorption tower 1 is carried into the glove box 3 and fixed therein, and a pipe (not shown) is connected through the glove port 11. 4 is a side view showing the operating state of the adsorption tower 1, and FIG. 5 is a side view from the direction A in FIG. Note that pipes and the like are omitted as in FIG. In the figure, 17 is a lid of the adsorption tower entrance / exit 4 of the glove box 3.

Next, a method of carrying in and out the adsorption tower of the present invention will be described with reference to FIGS. 6 is a side view when the adsorption tower according to the present invention is carried out from the glove box, and FIG. 7 is a side view when the adsorption tower according to the present invention is carried out from the glove box. (1) As shown in FIGS. 1 and 2, the adsorption tower 1 is hoisted by a wire 10 of a lifting machine 18 provided on an upper part of a glove box 3 through a hoisting piece 2, and a cylindrical vinyl bag 14 is adsorbed. The bag holder 12 of No. 1 and the bag holder 5 of the glove box 3 are fixed in a sealed state. (2) The old vinyl bag 9 in which the glove box 3 is sealed is torn from the bag holding portion 5 via the glove port 11 (or the vinyl bag 14). (3) As shown in FIG. 3, the adsorption tower 1 is loaded into the glove box 3, inserted and fixed in the arm receiver 15 and the adsorption tower fixing base 16, and connected by piping. (4) Remove the wire 10 of the lifting machine 18, and as shown in FIG. 4 and FIG.
To drive. (5) Certain time (time when the adsorbent reaches the saturated amount)
After the operation is completed, the pipe is removed from the globe port 11, the lid 17 is removed, and the adsorption tower 1 is lifted by the lifting machine 18 as shown in FIG.
The wire 10 is used to hang it up slightly above the glove box 3 via the hanging piece 2. (6) As shown by the broken line in FIG. 6, the vinyl bag 14 is squeezed under the adsorption tower 1 and welded at two places with a sealer or the like to hermetically seal. (7) As shown in FIG. 7, a vinyl bag 14a that seals the adsorption tower 1 with a vinyl bag 14 and a vinyl bag 14b that seals the glove box 3 (this is an old vinyl bag at an intermediate portion where two places are hermetically sealed). Become)
Then, the adsorption tower 1 is taken out from the glove box 3 in a hermetically sealed state. At this time, the glove box 3 is also sealed.

As described above, according to the present invention, the adsorption tower 1 can be carried in and out of the glove box 3 without exposing the adsorption tower 1 to the atmosphere. The present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0020]

As described above, according to the method and the adsorption tower of the present invention, even if the adsorption tower is too heavy for a human to lift, it can be easily carried in and out from the glove box while hermetically sealing the adsorption tower. It has an excellent effect such as being able to.

[Brief description of drawings]

FIG. 1 is a diagram showing the concept of loading an adsorption tower according to the present invention into a glove box.

FIG. 2 is a plan view of an adsorption tower according to the present invention.

FIG. 3 is a side view when the adsorption tower according to the present invention is carried into a glove box.

FIG. 4 is a side view showing an operating state of the adsorption tower according to the present invention.

5 is a side view from the direction A in FIG.

FIG. 6 is a side view when the adsorption tower according to the present invention is carried out from the glove box.

FIG. 7 is a side view when the adsorption tower according to the present invention is carried out from the glove box.

FIG. 8 is a side view showing the concept of loading a conventional adsorption tower into a glove box.

FIG. 9 is an enlarged view of a bag holding portion of the glove box.

FIG. 10 is a side view when a conventional adsorption tower is loaded into a glove box.

FIG. 11 is a side view when carrying out a conventional adsorption tower.

[Explanation of symbols]

1 adsorption tower 2 hanging piece 3 glove box 4 adsorption tower entrance / exit 5 bag holding part of glove box 6 protrusion 7a O-ring groove 7b O-ring 8 vinyl bag 9 old vinyl bag 10 wire 11 glove port 12 bag holding part of adsorption tower 13 arm 14 Cylindrical vinyl bag (plastic bag) 15 Arm holder 16 Adsorption tower fixing stand 17 Lid 18 Lifting machine

Claims (4)

[Claims] 1. In a method of moving an adsorption tower up and down by a hanging piece provided on the upper surface of the adsorption tower to carry the adsorption tower in and out of the glove box, one opening of a cylindrical plastic bag is attached to the adsorption tower. The bag holding part provided on the upper surface so as to surround the hanging piece is hermetically fixed, and the other opening is hermetically fixed to the bag holding part provided at the inlet and outlet of the adsorption tower of the glove box. Is hung from the adsorption tower inlet / outlet of the glove box with a hanging piece and loaded into the glove box.After the operation of the adsorption tower is completed, the adsorption tower is lifted from the adsorption tower inlet / outlet of the glove box with a hanging piece and taken out from the glove box. A method for carrying in and out an adsorption tower, characterized in that a plastic bag is squeezed under the tower and is carried out in a hermetically sealed state. 2. The method of loading / unloading an adsorption tower according to claim 1, wherein the plastic bag is a vinyl bag. 3. An adsorption tower having a bag holding portion so as to surround a hanging piece provided on the upper surface of the adsorption tower. 4. The bag holding portion is a projection having a short tubular shape, and an O-ring groove is provided on the outer surface thereof.
Adsorption tower described.