JPH02131899A - Cutting device for module - Google Patents

Abstract

PURPOSE:To rationalize cutting work by mutually interlocking a cutting part executing the cutting of a module, a vertically operating part moving vertically by gripping this module and packaging part packing the module pieces cut by the cutting part in a small bag. CONSTITUTION:A used module 12a is gripped by the gripper 51 of a vertically operating part 50, lifted by a winch 52 and hung down to the cutting edge of a cutting part 40. The upper edge 41 and lower edge 42 of a cutting edge are then moved mutually along the center direction of the module 12a by driving a hydraulic cylinder 43, the lower face of the upper edge 42 and upper face of the lower edge 43 are mutually slided and the module is cut. This cut module piece is moved to the sealing sheet device of a packaging part 60 after packing it into a small bag 62 and sealed by welding the opening end of the small bag 62. Thus the cutting work of the module can be executed by interlocking the vertically operating part 50, cutting part 40 and packaging part 60.

Description

[Detailed Description of the Invention] [Objective of the Invention] [Field of Industrial Application] The present invention relates to a hollow fiber membrane filter module (hereinafter referred to as a module) used, for example, in a condensate filtering device of a boiling water nuclear power plant. Regarding the cutting position of the module that is to be cut after use.

<Prior art> In 81m water type nuclear power plants, etc., a reactor filtration device is installed in the reactor condensate water supply system or waste liquid system to separate and remove corrosion products, and radiation reduction measures are taken with this. There is. In recent years, it has been known to use modules as a filtering material for such a filtering device.

This module is made of polyethylene (PE), for example. It is constructed by bundling a large number of fibrous hollow fiber membranes made of polymeric materials such as polycarbonate (PC), polyurethane (PU), and polyvinyl alcohol (PVA). A plurality of these modules are housed in a closed tank whose internal space is partitioned into upper and lower parts by a tube plate, and are suspended from the tube plate, thereby forming a filtering device.

Such a filter is attached to the piping of the condensate water supply system or the piping of the waste liquid system, and the condensate and waste liquid are continuously passed through to filter radioactive corrosion products and the like.

The configuration of a filtration apparatus using the above module will be explained with reference to FIG.

This reactor sieve [11] is installed in the reactor condensate water supply system or waste liquid system of a boiling water nuclear power plant, and is used to separate and remove radioactive corrosion products generated within the plant.

This furnace filtration device 1 has a vertically long cylindrical container body 2 with an open top end.
and a lid 3 attached to the upper opening of the container body 2 constitute a closed container 4. A supply liquid inlet nozzle 5 is provided near the lower end of the container body 2, and a processing liquid outlet nozzle 6 is provided at the upper end of the lid 3. Container Honkyu 2
A tube plate 7 is arranged horizontally between the lid body 3 and the tube plate 7.
7 lunge 8 and lid rest 3 provided on the outer periphery of the upper end of the container body 2
7 langes 9 provided on the outer periphery of the lower end thereof, and these are removably tightened with bolt and nut fasteners (not shown).

As a result, the inside of the airtight container 4 is partitioned into upper and lower parts by the tube plate 7, with the lower space being the overflow chamber 10 and the upper space being the processing liquid chamber 11.
It becomes.

When the module 12 is suspended from the tube plate 7,
There are several inside. That is, this module 12 bundles a large number of linear hollow fiber membranes 13 and connects them to the housing 14.
It has a linear structure in which the upper and lower ends are connected in three stages, and both the upper and lower ends are also solidified by a housing 14, and the upper end housing 14 is removably attached to the tube plate 7 with a fastener such as a nut. Note that a water collection pipe 15 made of resin is inserted through the center of the module 12. Further, a protection II 16 is suspended from the outer periphery of the module 12.

Thus, the internal hole of the hollow fiber membrane 13 communicates with the processing liquid chamber 11 via the housing 14 at the upper end, and also communicates with the east water pipe 15 via another housing 14. Also,
The water collection pipe 15 also communicates with the processing liquid chamber 11 via the housing 14 at the upper end. As a result, when a treated liquid such as condensate or waste liquid is supplied from the feed water inlet nozzle 5 to the furnace passage 10, it is subjected to overtreatment as it passes through the peripheral wall of each hollow fiber membrane 13, and the treated liquid is overtreated. The liquid is transferred outward from the process liquid outlet nozzle 6 via the process liquid chamber 11 .

Continue the liquid flow treatment operation, and if a large amount of crud adheres to the surface of the hollow fiber [l13], backwash the treatment liquid or supply air from the bubbling nozzle 17 provided below the module 12 to clean the hollow fiber membrane. Clean the surface of 13 and reuse it. After a predetermined period of time, the hollow fiber membrane 13
When the life of the module 12 has expired, it is replaced with a new module, and the used module 12 is cut and incinerated.

By the way, as the liquid flow treatment operation continues, the separated crud adheres to the surface of the hollow fiber membrane, and the amount thereof gradually increases. Therefore, regeneration actions such as backwashing are carried out periodically or when necessary, but as mentioned above, hollow fiber membranes have a certain useful life because they are not formed of resin, and after a certain period of operation, a new module is installed. It will be necessary to replace it with

After being stored in a storage tank, the used modules will be transported to an incineration facility and disposed of by incineration.

Since the module is relatively long (for example, 3 m) and cannot be stored as is in a container for transporting used modules, such as a drum can, it is necessary to cut the module into a predetermined length when storing it in the container. Furthermore, when the cut modules are taken out of the drum or the like and placed in an incinerator, it is desirable to prevent the cut hollow fibers from scattering and to ensure safe handling.

FIG. 5 shows the state in which the used module 12 is taken out from the furnace and stored in the storage tank. That is, the container body 2
After removing the lid body 3 from the pipe plate 7, the tube plate 7 is lifted up by an overhead crane 18. Next, from the tube plate 7 to the module 12
is removed, and the removed module 12 is stored in a storage tank 20 for a predetermined period of time. Due to its invasion, module 1 during the cutting process
2 by the zip crane 19, module 1
2 into a module cutting device (not shown).

(Problem to be solved by the invention) However, since used modules are radioactive due to the cladding attached to their surfaces, manual work is not only undesirable from the standpoint of preventing workers from being exposed to radiation, but also reduces flexibility. It is not easy to safely and reliably hold and mechanically cut long modules.

Furthermore, when the mist containing the cladding is scattered during cutting, there is a problem in that the radiation dose in the surrounding area increases.

There is currently no known device that can efficiently pack cut modules, making this task difficult.If the cut lengths of the modules are uneven, the efficiency of filling drums, etc. will be reduced. This causes problems such as an increase in the number of drums and a decrease in the operating efficiency of incineration equipment.

The present invention has been made to solve these problems, and an object of the present invention is to provide a module cutting device that can automatically, safely, efficiently, and rationally perform the cutting operation of used modules. .

[Structure of the Invention] <Means for Solving the Problems> The present invention provides a module cutting device for cutting used modules taken out from a furnace for disposal when disposing of them, and a cutting section for cutting the modules. and,
The present invention is characterized by comprising a vertical movement section for grasping the module attached to the cutting section and moving it up and down, and a packaging section for packing the module pieces cut at the cutting section into a pouch.

《Operation》 Grasp the used module with the grip of the vertical movement part, lift it up with a winch, and suspend it from the cutting blade of the cutting part.

When a hydraulic cylinder is driven to move the upper and lower blades of the cutting blade toward the center of the module, the lower surface of the upper blade and the upper surface of the lower blade come into contact with each other and are moved to cut the module. . After the cut module pieces are stuffed into a pouch, they are moved to a sealing device in the packaging section, and the open end of the pouch is welded and hermetically sealed. By interlocking the vertical movement section, the cutting section, and the packaging section in this way, it is possible to streamline the module cutting operation.

<<Example>> An example of a module cutting device according to the present invention will be described with reference to FIGS. 1 to 3. In addition, Fig. 1 is a configuration diagram showing a partial cross section of the module cutting device, Fig. 2 is a configuration diagram seen from a direction perpendicular to Fig. 1, and Fig. 3 is a top view of Fig. 1. be.

In each figure, the cutting device [30
It is roughly divided into a cutting section 40 for cutting the module 12 into small pieces, a vertical movement section 50 for grasping the module 12 and moving it up and down, and a small bag 62 containing the module pieces cut by the cutting section 40. It consists of a packaging section 60 for sealing.

The cutting section 40 consists of a combination of an upper blade 41 and a blade 42 for cutting the vertically long module 12 in the horizontal direction, and the lower blade 42 is cut horizontally by hydraulic pressure from a hydraulic cylinder 43 through a hydraulic circuit 44. It contacts the surface of the upper blade 41 and is driven. The hydraulic cylinder 43 is held by support legs 45.

The vertical movement unit 50 includes a winch 52 that grips the horizontally placed module 12a with a grip 51 and moves the grip 51 up and down, and a pivot post 53 that can rotate the suspended module 12. There is. In the figure, 54 is a rope, 55 is a pulley, 56 is a mounting plate for the pulley 55, 57 is a guide plate, and 58 is a module 12.
It shows a bag surrounding the. The packaging section 60 is the cutting section 4
A guide 61 for guiding the module pieces cut at 0 to be stuffed into a pouch 62, a moving mechanism 63 that can move the pouch 62 from side to side, and a fixture 64 for attaching the pouch 62 to this moving mechanism 63. It's happening. The moving mechanism 63 includes a bag supply l1ij 65 and a sealing device 66 that moves the bag supply device 65 to a position where cut module pieces are stuffed into the pouch 62 and heat-bonds the upper end of the pouch 12b after the cut module pieces are stuffed. It has become. In the figure, 67 is a shaft, 68 is a moving belt, and 69 is a shaft.
is a bearing.

In the above-mentioned cutting device, first, as shown in FIG.
A is rotated to the outside of the pivot post 53, grabbed by the gripper 51, and lifted up via the row 154 by the winch 52. Thereafter, the pivot post 53 is pivoted to the inside and loaded into the cutting section 40. Activation of winch 52 suspends module 12. The lower end of the suspended module 12 is moved by the hydraulic cylinder 43, and the upper blade 4
1 together with module 12. The cut module pieces are packed into a pouch 62 via a guide 61. The filled pouch 62b is moved to the outside by a moving mechanism 63, the upper part of the bag is welded and sealed by a sealing device 66, and the bag is incinerated (carried out). It has become.

A small bag 62 filled with module pieces as shown in FIG.
If a is on the outside, the small bag 6 waiting in the bag supply device H65
2C, the empty pouch 62b is placed on the moving belt 68 and reaches just below the cutting section 40. Therefore, the module can be disconnected without waiting time.

According to this embodiment, by attaching the vertical movement section 50 to the cutting section 40, the cutting and lowering movements of the module 12 can be linked, so that the module can be cut efficiently.

Further, since a plurality of pouches 62 can be attached to the packaging section 60, the module 12 can be cut while the pouches 62 are being handled. Therefore, the bag can be cut without waiting for the time required for bag handling.

In this way, the hollow fiber membrane filter can be cut efficiently, and the working time can be shortened, resulting in a significant reduction in radiation exposure to workers.

In the above embodiment, a vertical cutting device that cuts the module in a suspended state has been described, but it is also possible to use a horizontal cutting device that cuts the module while it is placed horizontally. In this case, a lifting device is replaced by a transporting device that can transport the module in a horizontal position.

Also, dust from the module. In order to prevent water droplets from scattering, it is also effective to transport the module in a bag 62 and cut it.

[Effects of the Invention] According to the present invention, the module cutting operation by the cutting section,
Links the vertical movement of the module with the vertical movement part,
Furthermore, the cutting operation can be streamlined by interlocking the opening end sealing operation of the pouch by the packaging section. Therefore, the cutting process of the radioactive module can be performed safely and efficiently.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG.
FIG. 3 is a top view of FIG. 1, and FIG. 4 is a cross-sectional view of a filtration device using a hollow fiber membrane filter module for supplying to the cutting device of the present invention. FIG. 5 is a schematic view showing the suspended state of the hollow fiber membrane filter module in FIG. 4 when cut. DESCRIPTION OF SYMBOLS 1... Furnace filtration device, 30... Cutting device, 21... Upper blade, 43... Hydraulic cylinder 44... Hydraulic circuit, 50... Vertical operation part, 52... Winch, 54 ... rope, 56 ... mounting plate, 58 ... bag. 61...Guide, 63...Movement tllL 65...Bag supply device 12...Module 40...Cutting section 42...Lower blade 45...Support leg 51...Gripper 53. ... Swivel boss 55 ... Pulley 57 ... Guide plate 60 ... Packaging section 62 ... Small bag 64 ... Attachment 66 ... Sealing device 67 ... Shaft 68 ... Moving belt 69...Bearing (8733) Agent Patent Attorney Yoshiaki Inomata (and 1 other person)

Claims (1)

[Claims] In a module cutting device for cutting a used hollow fiber membrane filter module taken out from a filtration device and disposed of, a cutting section for cutting the module and the module attached to this cutting section are grasped. A module cutting device comprising: a vertical movement section for moving the module up and down; and a packaging section for packing the module pieces cut by the cutting section into a pouch.