JPH01129200A - Tray type charcoal filter cutting device - Google Patents

Abstract

PURPOSE:To prevent chips from being mixed in charcoal and charcoal from firing or dispersing by fusing a casing of a charcoal filter by plasma cutter and supplying cooling air and inert gas in the neighborhood of cutting of the casing. CONSTITUTION:Opening of a charcoal filter 8 of a used welding structure is provided on the upper part 2 thereof on a frame, an air intake hood is detachably set in the opening and an exhaust hood also in the opening. Next, a moving mechanism 3, a plasma cutter 4, an air intake device 5 and an exhaust device 6 are manually or automatically actuated by an operation panel 7. Plasma is jetted toward a front casing of the charcoal filter 8 from a plasma cutting torch, and the front casing of the charcoal filter 8 is fused by high temperature plasma. Since at this time cooling air is supplied from the air intake device 5, high temperature metal fumes dispersed from a fusing part are quickly cooled.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention is a used tray-type charcoal filter with a welded structure used for ventilation and air conditioning equipment in nuclear facilities, etc., to discharge the charcoal contained in the casing. The present invention relates to a cutting device that cuts the casing when cutting the casing.

[Conventional technology]

Charcoal filters are installed in ventilation and air conditioning equipment at nuclear facilities and the like to remove radioactive gases from the gas. Tray-type charcoal filters, which are one type of charcoal filter, have a bolted structure in which the face plate is removably attached to the opening on one side of the casing with bolts, and a welded structure in which the casing is integrally welded. be.

Hereinafter, the tray-type charcoal filter having the above-mentioned welded structure will be explained with reference to FIGS. 6 to 8.

This welded tray type charcoal filter 8 has four punching plates (perforated plates) or wire meshes 81 fixed at intervals vertically inside a side bottom casing 80 forming a U-shaped frame shape. The inside of 80,
It is partitioned into an upper and lower charcoal filling chamber 82 and an air outflow passage (air slot section) 83 for filtering the middle chamber. A spacer 84 is interposed between two upper and lower punching plates or wire meshes 81 that partition this air slot portion 83. The charcoal filling chamber 82 is filled with charcoal having a diameter larger than the inner diameter of the hole in the punching plate or the mesh of the wire mesh.

A front casing 8 is attached to the open end of the side bottom casing 80.
5 is fixed by welding, the opening of the charcoal filling chamber 82 is closed, and the charcoal is enclosed and contained in the charcoal filling chamber 82. A rectangular opening 86 communicating with the air slot portion 83 is provided in the front casing 85, a handle 87 is provided on the front surface of the front casing 85, and a backing 88 is bonded to the back surface of the front casing 85.

When the above-mentioned charcoal filter is used, the front casing 85 of the bolted structure is removed, the charcoal contained therein is discharged and incinerated, the volume is reduced, and the filter is stored in a waste storage. Items with welded structures will be stored as is in the waste bin.

[Problems to be Solved by the Invention] However, the welded structure charcoal filter described above is stored as is in a waste bin without undergoing volume reduction treatment, so
The disadvantage is that it takes up a lot of storage space. Therefore, it is conceivable to cut the casing, discharge the charcoal contained therein, incinerate it, and compress the casing to reduce its volume and store it in a waste repository.

However, when cutting a casing containing charcoal, there are the following problems.

1. If non-flammable casing chips are mixed into charcoal, it will become an obstacle during volume reduction by incineration.

Since the charcoal containing λ is flammable with an ignition point of 340°C, there is a risk of ignition due to the heat generated during cutting.

3. Since the charcoal inside adsorbs radioactive gas, there is a risk that it will scatter and contaminate the surrounding area when the casing is cut.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tray-type charcoal filter cutting device that can cut a casing without chips getting mixed into the charcoal and without the risk of igniting or scattering the charcoal.

[Means for solving problems]

The present invention provides a plasma cutting machine for cutting a welded casing, and a cold air cutter in the vicinity of the cutting of the casing.

It is characterized by being equipped with an air supply device that supplies at least one of inert gases, etc., and an exhaust device that discharges and collects fine metal powder, charcoal powder, etc. generated near the melting of the casing.

[Effect]

According to the present invention, no chips are generated when the casing is cut by a plasma cutter. In addition, the air supply device can supply cold air, inert gas, etc. to the vicinity of the casing melt, thereby lowering the temperature of the metal fume or creating an atmosphere in which the charcoal contained therein does not burn. Further, the exhaust device can discharge and collect metal fumes, charcoal fine powder, etc. generated near the melting of the casing.

〔Example〕

Hereinafter, two of the embodiments of the tray-type charcoal filter cutting device of the present invention will be described with reference to FIGS. 1 to 5.

Figures 1 to 3 show a first embodiment of the tray-type charcoal filter cutting device of the present invention, where Figure 1 is a side view, Figure 2 is a plan view, and Figure 3 is an enlarged view of Figure 1. It is a diagram.

In the figure, 1 is a framework of the cutting device of the present invention, and on this framework 1, a pedestal 2 on which a tray-type charcoal filter 8 of a welded structure is placed, a moving mechanism 3 for moving the pedestal 2,
A plasma cutting machine 4 that melts the casing of the charcoal filter 8, an air supply device 5 that supplies cold air, inert gas, etc. to the vicinity of the melted casing, and metal fume and charcoal fine powder generated near the melted casing. It is equipped with an exhaust device 6 for discharging gas, and an operation panel 7 for operating the moving machine 3, plasma cutting machine 4, air supply device 5, and exhaust device 6.

The pedestal 2 is mounted on the frame 1 so as to be movable in the X direction and the Y direction, as shown in FIG.

The moving mechanism 3 includes a servo motor 30 for moving in the X direction, a servo motor 31 for moving in the Y direction, and a servo motor 30 for moving in the X direction and a servo motor 31 for moving in the Y direction.
and a feed shaft 32 for moving in the X direction and a feed shaft 33 for moving in the Y direction, which are respectively linked to the frame 2. Said X
By driving the direction movement servo motor 3° and the Y direction movement servo motor 31, the pedestal 2 can be moved in the X direction and the Y direction.

The plasma cutting machine 4 includes a power supply box 40 installed in the framework 1.
and a plasma cutting torch 41 fixed to the framework 1 within the movement range of the pedestal 2 in the X direction and the Y direction,
This plasma cutting torch 41 and power supply box 40 are connected,
Plasma is ejected downward from the plasma cutting torch 41.

The air supply device 5 includes an air supply hood 50 that can be detachably set in an opening 86 that communicates with the air slot portion 83 of the charcoal filter 8 placed on the pedestal 2, and a connection between the air supply hood 50 and the air supply device main body. It consists of an air supply pipe 51 interposed in between. Air supply pipe 51. Cold air or inert gas, or cold air and inert gas, etc. can be supplied into the air slot portion 83 through the opening 86 of the air supply hood 50° charcoal filter 8.

The exhaust device 6 includes a pre-filter, a hepa filter, and a charcoal filter (not shown) built into the exhaust device main body.
, an exhaust hood 60 that can be detachably set around the upper end of the charcoal filter 8 placed on the pedestal 2, and an exhaust pipe connected to the exhaust hood 60 and the pre-filter, hepa filter, and charcoal filter of the exhaust device main body. 6
Consists of 1.

The exhaust hood 60 has a planar mouth shape, has a hollow structure inside, and has an open inner peripheral surface facing the charcoal filter 8. Thus, the gas containing metal fumes, charcoal fine powder, etc. generated at the upper end of the charcoal filter 8 can be discharged from the upper end of the charcoal filter 8 through the exhaust hood 60° exhaust pipe 61, and the metal fume, charcoal fine powder, etc. mentioned above can be discharged from the upper end of the charcoal filter 8. can be collected by a group of filters.

The operation panel 7 includes the moving mechanism 3, the plasma cutting gas 4,
The charcoal filter 8 is connected to the air supply device 5 and the exhaust device 6, and the cutting device of the present invention is operated manually or automatically.
Cut the casing.

If the servo motors 30 and 31 of the moving mechanism 3 are electrically connected to a controller (not shown) built in the operation panel 7, the position of the frame 2, that is, the cutting position of the charcoal filter 8 can be accurately positioned. can be carried out, and reproducibility can also be ensured.

The cutting machine of the present invention in this embodiment has the above configuration, and the cutting operation of the charcoal filter 8 will be explained below.

First, a used welded charcoal filter 8 is placed on the pedestal 2 with the opening 86 facing upward.

Next, the air supply hood 50 is removably set in the opening 86 of the charcoal filter 8, and the exhaust hood 60 is removably set in the upper end of the charcoal filter 8.

Then, the moving mechanism 3, plasma cutting machine 4, air supply device 5, and exhaust device 6 are operated manually or automatically using the operation panel 7. Then, plasma is injected from the plasma cutting torch 41 toward the front casing 85 of the charcoal filter 8, and the front casing 85 of the charcoal filter 8 is fused due to the high heat of the plasma. At this time, cold air or inert gas flows from the air supply device 5 through the air supply pipe 50, the air supply hood 51, the opening 86 of the charcoal filter 8, and the air slot portion 83 to the vicinity of the melted front casing 85.
Alternatively, since cold air, inert gas, etc. are supplied, the high-temperature metal fume that scatters from the fused portion of the front casing 85 is rapidly cooled by the cold air. Also, use an inert gas to create an atmosphere in which the charcoal does not burn. As a result, even if the plasma cutter 4, which generates high heat, is used, there is no risk of the contained charcoal igniting.
Fine charcoal powder and the like scattered by the compressed air of the plasma are discharged from the vicinity of the fusing of the front casing 85 through the exhaust hood 60 and the exhaust pipe 61, and are collected by the filter group.

As a result, there is no risk of the charcoal fine powder adsorbing radioactive gas scattering and contaminating the surrounding area.

Moreover, no metal fume is mixed into the charcoal.

Thus, the moving mechanism 3 moves the charcoal filter 8 in the X and Y directions via the mount 2, and the front casing 85 of the charcoal filter 8 is cut by the plasma cutter 4. At this time, plasma cutting machine 4
is used, so no chips are generated when cutting the front casing 85.

As a result, by cutting the front casing 85 of the charcoal filter 8 as described above, there is no risk of causing any trouble when the charcoal is incinerated to reduce its volume. Can be reduced in volume.

FIG. 4 is a side view of a plasma cutting torch portion showing a second embodiment of the tray-type charcoal filter cutting device of the present invention, and FIG. 5 is a view taken in the direction of arrow V in FIG. 4.

In the figure, the same reference numerals as in FIGS. 1 to 3 indicate the same parts.

In this embodiment, the cutting device of the present invention fixes a pedestal (not shown) on which a used charcoal filter 8 is placed, and in FIG. A plasma cutting torch of a plasma cutting machine 4 is fixed to this movable suspension frame 9. A feed shaft 32 for moving in the X direction and a feed shaft 33 for moving in the Y direction, which are linked to a servo motor 30 for moving in the X direction and a servo motor 31 for moving in the Y direction, are linked to this movable suspension frame 9.

The cutting device of the present invention in this embodiment cuts the casing of the charcoal filter 8 by fixing the charcoal filter 8 and moving the plasma cutting torch 41, and is similar to that of the first embodiment described above. can achieve the following effects.

In addition, in the above-mentioned embodiment, the charcoal filter 8
However, it is also possible to move both the charcoal filter 8 and the plasma cutting torch 41.

〔Effect of the invention〕

As is clear from the above, the tray-type charcoal filter cutting device of the present invention uses a plasma cutter to melt and cut the casing of the charcoal filter, so no chips are generated. In addition, since cold air and inert gas are supplied near the cutting part of the casing, the high-temperature metal beam generated at the cutting part of the casing can be rapidly cooled, or the inert gas can be cooled down. The gas can create an atmosphere in which charcoal does not burn. Therefore,
Even if a plasma cutting machine that generates high heat is used, there is no risk of the contained charcoal igniting.Furthermore, it is possible to discharge and collect metal particles and charcoal fine powder generated near the melting of the casing. There is no risk of contamination.

[Brief explanation of the drawing]

Figures 1 to 3 show a first embodiment of the tray-type charcoal filter cutting device of the present invention, where Figure 1 is a side view, Figure 2 is a plan view, and Figure 3 is an enlarged view of Figure 1. It is a diagram. FIG. 4 is a side view of the plasma cutting torch portion showing the second cooling operation of the tray-type charcoal filter cutting device of the present invention, and FIG. 5 is a view taken in the direction of the arrow ■ in FIG. 6 is a perspective view showing a tray-type charcoal filter having a welded structure, FIG. 7 is a sectional view taken along the line ■--■ in FIG. 6, and FIG. 8 is a sectional view taken along the line ■--■ in FIG. 6. 1... Frame, 2... Frame, 3... Moving mechanism, 4...
...Plasma cutting machine, 41...Plasma cutting torch,
5...Air supply device, 6...Exhaust device, 7...Operation panel, 8...Charcoal filter, 80.85...Casing, 9...Movable hanging frame. Patent applicant: Shinryo Corporation Representative Patent attorney: Tadashi Akimoto 1 other person No. 30 No. 4 Garden No. 7 Figure TS 8 Figure

Claims (1)

[Claims] 1. Moving a stand on which a used tray-type charcoal filter with a welded structure is mounted, a plasma cutting machine for fusing the casing of the tray-type charcoal filter, and at least one of the torch of the plasma cutting machine and the stand. an air supply device that supplies cold air, inert gas, etc. to the vicinity of the melting of the casing, and an exhaust device that discharges gas containing metal fume, charcoal fine powder, etc. generated near the melting of the casing. A tray-type charcoal filter cutting device characterized by: