JPH0634905B2 - Filter device module - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a filter module of a filtering device, which is a constituent element of the filtering device and is composed of a large number of filters.

[Technical background of the invention and its problems]

In nuclear power plants, the suppression of the generation of corrosion products and their removal are performed as a radiation reduction measure. To remove the corrosion product, for example, a radioactive waste liquid generated in a nuclear power plant or a suspension present in the condensate of the primary cooling system is separated and removed using a filtration device.

Conventionally, there is a filter device that uses a pre-coated filter such as a powder ion exchange resin, but in this case a large amount of resin waste is generated, the filtration efficiency is low, and the installation space of the filter device is low. Also, there is a problem that equipment costs increase.

Therefore, recently, there has been a tendency to employ a hollow fiber membrane filtering device using a hollow fiber membrane filter. The structure of the hollow fiber membrane filter module in the conventional initial hollow fiber membrane filtration device is
Shown in the figure. A plurality of hollow fiber membrane filter modules 1 are provided in the container body of the filtration device, and each is attached and fixed to the partition plate 3 in the container body. In this hollow fiber membrane filter module 1, the hollow fiber membrane filter 5 has a substantially U shape,
Both ends of this hollow fiber membrane filter 5 are adhered and fixed by end members 7. The waste liquid is supplied from the outside of the hollow fiber membrane filter 5 and is filtered by the hollow fiber membrane filter 5. The filtered filtered water rises in the hollow part of the hollow fiber membrane filter 5, and the partition plate 3 is fed from both ends of the hollow fiber membrane filter 5.
Is led to the upper part of.

However, in the hollow fiber membrane filter module 1 in such a conventional initial hollow fiber membrane filtration apparatus, the hollow fiber membrane filter 5 having a small inner diameter is used in order to increase the filtration area.
Since the inner diameter is 0.1 to 0.5 mmφ, it is considered that the length of the hollow fiber membrane filter 5 is limited to about 1 m, considering the pressure loss of the filtered water flowing through the hollow fiber membrane filter 5. . Therefore, in order to obtain the required filtration treatment capacity, it is necessary to attach a large number of hollow fiber membrane filter modules 1 composed of hollow fiber membrane filters 5 having a length of 1 m or less. As a result, the size of the filter is increased in the horizontal direction, and the installation space for the filter is increased. Further, it is known that the vertically long structure of the container body itself of the filtering device is structurally advantageous over the horizontally long structure.

FIG. 7 is a sectional view showing a hollow fiber membrane filter module in another conventional hollow fiber membrane filtering device.

In this hollow fiber membrane filtering device, one or a plurality (for example, two) of hollow fiber membrane filter modules 9 are connected in series and connected, and the connected body of the hollow fiber membrane filter modules 9 connected in series is the container body. A large number of partition plates 11 are attached and fixed. Each hollow fiber membrane filter module 9
Arranges a large number of hollow fiber membrane filters 15 around the water intake pipe 13, and these water intake pipes 13 and the hollow fiber membrane filter 15
Both ends of the are adhered and fixed to the end member 17 in an open state. The hollow fiber membrane filter module 9 is connected in series by the intermediate fixing metal fitting 19, and the tip fixing metal fitting 21 is provided at the lowermost end of the combined body of the hollow fiber membrane filter module 9. In such a hollow fiber membrane filter module 9, the filtered water filtered by the hollow fiber membrane filter 15 is
It flows from the hollow part of the hollow fiber membrane filter 15 into the space formed by the intermediate and tip fixing fittings 19 and 21, rises in the water intake pipe 13 and is guided to the upper part of the partition plate 11.

However, in the hollow fiber membrane filter module 9 in such another conventional hollow fiber membrane filtering device, the end member 17 is
Is composed of a fixing agent 23 for fixing the water intake pipe 13 and the hollow fiber membrane filter 15 and a ring 25. Therefore, the water intake pipe 13 is fixed to the ring 25 only by the fixing agent 23. As a result, the fixing strength between the water intake pipe 13 and the end member 17 may not be sufficient, and in this case, it may be difficult to connect the plurality of hollow fiber membrane filter modules 9 in series.

Further, when the water intake pipe 13 is fixed to the ring 25 with the adhesive 23, both the water intake pipe 13 and the ring 25 may relatively move in the diametrical direction, and the water intake pipe 13 is diametrically centered in the end member 17. It is difficult to set and install. Therefore, it is difficult to manufacture the hollow fiber membrane filter module 9.

[Object of the Invention]

The present invention has been made in consideration of the above facts,
It is an object of the present invention to provide a filter module of a filtration device that has sufficient strength to connect and connect a plurality of units in series in the longitudinal direction and is easy to manufacture.

[Outline of Invention]

In order to achieve the above-mentioned object, the filter module of the filtration device according to the present invention is provided in a plurality in the container body of the filtration device, each filter module being disposed around the intake pipe and around the intake pipe. A large number of the filters are integrally fixed by an end member arranged at the end of the water intake pipe, and the water intake pipe and the end member are fixed via a support member, The fixing strength between the water intake pipe and the end member is increased.

Further, a filtered water reservoir is formed between the end members of the filter module connected in the longitudinal direction.

Example of Invention

 Embodiments of the present invention will be described below with reference to the drawings.

A cartridge type vertical hollow fiber membrane filtration device used in a nuclear power plant is one in which a plurality of hollow fiber membrane filter modules are arranged in the container body of the filtration device and the waste liquid is filtered by this hollow fiber membrane filter module. is there. The partition plate 31 shown in FIG. 1 is disposed in the container body, and the hollow fiber membrane filter module 33 is vertically installed on the partition plate 31, and the partition plate 31 causes the inside of the container body to serve as a filtered water chamber 35. It is partitioned into a filtration processing chamber 37. The filtration processing chamber 37 is filled with the waste liquid, and the filtration water chamber 35
The filtered filtered water is introduced into.

The hollow fiber membrane filter module 33, as shown in the figure,
Two or more (two in the figure) hollow fiber membrane filter modules 33 are connected in series and coupled, and hung down on the partition plate 31 as a hollow fiber membrane filter module assembly 39. Each hollow fiber membrane filter module 33 includes an intake pipe 4
1, a large number of hollow fiber membrane filters 43 arranged around the water intake pipe 41, and end portions which are arranged at both ends of the water intake pipe 41 and integrally fix the water intake pipe 41 and the hollow fiber membrane filter 43. The water intake pipe 41 is fixed to the end member 45 via the support member 47.

The end member 45 is obtained by filling the inside of a substantially cylindrical ring 49 with a fixing agent 51 in a molten state and solidifying it, and the fixing agent 51 causes both ends of the intake pipe 41 and a large number of hollow fiber membrane filters. Both ends of 43 are bundled. Further, as shown in FIG. 2 and FIG. 3, the end member 45 is such that a small-diameter short cylinder 53 and a large-diameter ring plate 55 are arranged concentrically and are integrally formed by an arm 57. Is.
The arms 57 are arranged at equal intervals in the circumferential direction of the ring plate 55.
Book placement. In addition, the short cylinder 53 has a water intake pipe 41 inside.
It is formed so that it can be fitted. Ring plate 55
Are formed to have substantially the same diameter as the abutting portion of the ring 49 on the end member 45.

In molding the end member 45, the support material 47 is first fixed to the ring 49, and the intake pipe 41 is fitted and fixed to the short cylinder 53 of the support material 47 fixed to the ring 49. Next, a large number of hollow fiber membrane filters 43 in the gap between the short cylinder 53 of the support material 47 and the ring plate 55 are arranged so as to penetrate therethrough. Finally, in this state, the molten adhesive 5
Pour 1 to solidify. At this time, the water intake pipe 41 and the hollow fiber membrane filter 43 are maintained in the open state.

Now, the hollow fiber membrane filter module 33 composed of the water intake pipe 41, the hollow fiber membrane filter 43, etc. is connected in the longitudinal direction, and the hollow fiber membrane filter module 33 in the upper and lower two stages is connected.
The hollow fiber membrane filter module assembly 39 is composed of The hollow fiber membrane filter module 39 is connected by connecting the ring 49 of the corresponding end member 45 of the hollow fiber membrane filter module 33 arranged in series with the cylindrical intermediate fixing metal fitting 56. As a result, a filtered water reservoir 57A is formed by being surrounded by the fixing bracket 56 and both end members 45.

Further, the bottom end end member 45 of the hollow fiber membrane filter module 39 is also attached to the ring 49 of the end member 45 with a bottomed cylindrical bottom end fixing member 59. Also in this case, the filtered water reservoir 57B is formed by being surrounded by the lower end fixing member 59 and the end member 45 at the lowermost end.

The partition plate 31 also has a flanged upper end fixing member 6
1 is provided. Hollow fiber membrane filter module assembly 3
9 is vertically attached to the partition plate 31 by attaching the ring 49 of the uppermost end member 45 to the fixing fitting 61. These middle, lower end and upper end fixing brackets 56, 59,
The attachment between 61 and the end member 45 is made by a connecting means such as screwing, inserting, or adhering. Also, the fixing bracket 5
A seal 63 is provided at a mounting portion between 6, 59, 61 and the ring 49 of the end member 45. The seal 63 allows the water to enter the filtered water reservoirs 57A and 57B and the filtered water chamber 35, and the filtering treatment chamber 37. It is provided so that the waste liquid of is not mixed.

Next, the operation of the hollow fiber membrane filter module 33 or the hollow fiber membrane filter module assembly 39 during the filtration process of the hollow fiber membrane filter filtration device will be described.

The waste liquid introduced into the filtration processing chamber 37 is introduced into the hollow fiber membrane filter module 33 of the hollow fiber membrane filter module assembly 39, and the hollow fiber membrane filter module 3
It is filtered when passing through the hollow fiber membrane filter 43 of No. 3.
The filtration is performed by permeating the water in the waste liquid into the hollow portion of the hollow fiber membrane filter 43 and trapping the clad in the waste liquid on the outer surface of the hollow fiber membrane filter 43. By this filtration, the water and the clad are separated. To do.

The separated filtered water passes through the hollow portion of the hollow fiber membrane filter 43, and passes through the filtered water chamber 35 and the filtered water reservoirs 57A, 57.
You will be guided to B. The filtered water guided to the filtered water reservoir 57A is the hollow fiber membrane filter module 33 arranged in the upper stage.
The water is introduced into the filtered water chamber 35 through the water intake pipe 41.
Further, the filtered water guided to the filtered water reservoir 57B is taken in by the intake pipe 4 of the hollow fiber membrane filter module 33 arranged in the lower stage.
1. The water is introduced into the filtered water chamber 35 through the filtered water reservoir 57A and the water intake pipe 41 of the hollow fiber membrane filter module 33 arranged in the upper stage in sequence. On the other hand, the clads captured by the large number of hollow fiber membrane filters 43 temporarily adhere to these hollow fiber membrane filters, but most of them fall after that.

The filtering action of each hollow fiber membrane filter module 33 is
It is continuously performed until the filtration differential pressure between the filtered water chamber 35 and the filtration processing chamber 37 reaches a predetermined maximum value.

As described above, according to the above-described embodiment, since the water intake pipe 41 of the hollow fiber membrane filter module 33 is directly fixed to and supported by the ring 49 of the end member 45 via the support member 47, the water intake pipe 41 and the end thereof are not supported. The fixing strength with the member 45 can be increased. As a result, it becomes possible to connect a large number of hollow fiber membrane filter modules 33 in series, so that the filtration efficiency of the hollow fiber membrane filtration device can be improved and the installation space of the filtration device can be reduced. Even when a large number of the hollow fiber membrane filter modules 33 are connected, since the filtered water reservoir 57A exists between the hollow fiber membrane filter modules 33, the filtration that flows in the hollow fiber membrane filter 43 of each hollow fiber membrane filter module 33. The pressure loss of water is maintained at the optimum value.

Further, when the intake pipe 41 is attached to the center of the end member 45 in the diametrical direction at the time of manufacturing the hollow fiber membrane filter module, the support member 47 functions as a guide for positioning the intake pipe 41, so that the intake pipe can be attached quickly. The hollow fiber membrane filter module can be easily manufactured.

In the above embodiment, one end of the short cylinder 53 of the support member 47 is formed flush with the ring plate 55, and the arm 5
Although the case where the number 7 is three has been described, as shown in FIG. 4, the upper and lower ends of the short cylinder 53A project from the ring plate 55, and the support member 47 composed of four arms 57A.
It may be A. Further, as shown in FIG. 5, the support 47 and the ring 49 of the end member 45 may be integrally formed in advance.

Further, as the filter module in this embodiment, the hollow fiber membrane filter module 39 in which a large number of hollow fiber membrane filters 43 are arranged has been described.
It may be a filter module composed of a cylindrical filter other than 3.

Further, in this embodiment, the case where two or more hollow fiber membrane filter modules 33 are vertically installed as the hollow fiber membrane filter module assembly 39 on the support plate 31 is explained, but a single hollow fiber membrane filter is used. The module 33 may be vertically installed on the partition plate 31.

Further, in this embodiment, the filtration of waste liquid or the like in the nuclear power plant has been described, but the present invention can also be applied to filtration of waste liquid or suspension in other plants.

〔The invention's effect〕

As described above, according to the filter module of the filtration device of the present invention, since the intake pipe and the end member are fixed via the support member, the fixing strength between the intake pipe and the short member is increased. However, the strength of the filter module in the longitudinal direction can be set to a strength that is sufficient for connecting and hanging the filter module in series, and the filter module can be easily manufactured.

Furthermore, since the pressure loss of the filtered water flowing through the hollow fiber membrane filter is maintained at an optimum value, it is possible to connect the hollow fiber membrane modules as appropriate in the longitudinal direction, and to significantly reduce the installation space of the filtration device. it can.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a filter module of a filtration device according to the present invention, FIG. 2 is an enlarged sectional view showing an essential part of FIG. 1, and FIG. 3 is a supporting material of this embodiment. FIG. 4A is a sectional side view, FIG. 4B is a plan view, FIG. 4 is a first modification of the support member, and FIG.
(B) is a plan view, FIG. 5 shows a second modification of the support member,
(A) is a sectional side view, (B) is a plan view, FIG. 6 is a sectional view showing a hollow fiber membrane filter module in a conventional initial hollow fiber membrane filtration device, and FIG. 7 is another conventional hollow fiber membrane filtration. It is sectional drawing which shows the hollow fiber membrane filter module in an apparatus. 33 ... Hollow fiber membrane filter module, 41 ... Intake pipe, 43 ... Hollow fiber membrane filter, 45 ... End member, 4
7 ... Supporting material, 49 ... Ring.

Claims (2)

[Claims] 1. A filter module of a filter device, wherein a plurality of filter modules are provided in a container body of a filter device, wherein each filter module comprises an intake pipe and a plurality of filters arranged around the intake pipe. The end member of the filter module is integrally fixed by an end member arranged at the end, the intake pipe and the end member are fixed via a support member, and is further connected in the longitudinal direction. A filter module for a filtering device, characterized in that a filtered water reservoir is formed between the two. 2. A filter module for a filter device according to claim 1, wherein a support member is previously integrally formed on the end member.