JPH08117566A - Filter module - Google Patents

Abstract

PURPOSE: To provide a filter module capable of keeping filtering capacity by enabling air venting by a simple structure without involving complicated manufacturing work. CONSTITUTION: In a filter module 10 wherein the interior of a cylindrical case is partitioned by a partition wall 3 and hollow yarn bundles 2 composed of a semipermeable membrane are housed in the partitioned space 4 on a raw water supply side and both end parts of the hollow yarn bundles 2 are respectively embedded in the partition wall 3 so that the hollow interiors thereof are opened to the opposite wall surface of the case, at least one fine hole 5 piercing the wall of the partition wall 3 or the cylindrical case 1 is provided to the partition wall 3 or the wall of the cylindrical case 1 on the raw water supply side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter module using a water-permeable hollow fiber, and more particularly to a filter module capable of preventing deterioration of filtration performance due to air inclusion.

[0002]

2. Description of the Related Art A filter module using a hollow fiber having water permeability constitutes a filter by assembling a plurality of these, and is used for purification of drinking water, for pool circulation filtration system,
Widely used for filtering and purifying water in ponds. FIG. 6 shows an example of such a filter module. Tubular case 7
The inside of 1 is partitioned by a partition wall 73, and a hollow fiber bundle 72 made of a semipermeable membrane is folded and stored in a U shape in a partition space 74 on the raw water supply side, and both ends of the hollow fiber bundle 72 are separated from the partition wall 73. The hollow interior is embedded so as to open to the opposite side wall surface.

In the filter module having such a structure, when air enters the partition space 74 on the raw water supply side,
The air is not filtered by the hollow fiber bundle 72 and gradually accumulates in the partition space 74. Such air may be contained in the raw water from the beginning, or may be mixed during replacement of the old and new modules or during backwashing for regeneration of the filtration performance of the hollow fibers. However, when a large amount of air is accumulated in the partition space 74, the hollow fiber bundles 7 in the air accumulating portion S are
Since No. 2 does not come into contact with raw water, the filtration performance such as the amount of filtered water is reduced accordingly.

Conventionally, as a measure for preventing the deterioration of the filtration performance due to such a phenomenon, a hydrophobic hollow fiber is mixed into the semipermeable membrane hollow fiber bundle for removing air, or a hydrophobic fiber having a closed tip is used. It has been practiced to mix microporous tubes. However, the work of mixing other hollow fibers or tubes of different types and storing them in the cylindrical case is extremely complicated, which causes an increase in the manufacturing cost of the filtration module.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a filter module which can maintain its filtering performance by enabling air venting with a simple structure without any complicated work in manufacturing. It is in.

[0006]

Means for Solving the Problems The present invention which achieves the above object, comprises partitioning the inside of a cylindrical case with a partition wall, and housing a hollow fiber bundle made of a semipermeable membrane in the partition space on the side of raw water supply, Both ends of the hollow fiber bundle are embedded in the partition wall so that the hollow inside opens to the opposite side wall surface, or one end of the hollow fiber bundle is opened to the partition wall and the hollow inside opens to the opposite side wall surface. In the filter module that is embedded so that the other end is closed, at least one partition wall or the cylindrical case wall on the raw water supply side is penetrated through the partition wall or the cylindrical case wall. This is characterized in that the fine pores are provided.

Since the pores provided in the partition wall or the cylindrical case wall discharge the air mixed in the partition space to the outside of the system as described above, the filtration performance of the hollow fiber bundle due to the accumulation of air in the partition space is improved. No decrease occurs. Moreover, the pores can be easily processed by drilling or the like after manufacturing the filtration module, and there is no manufacturing complexity such as bundling different kinds of hollow fibers or tubes in the related art.

[0008]

FIG. 1 shows an example of a filter module according to an embodiment of the present invention. Filter module 10 shown in FIG.
In the figure, 1 is a cylindrical or rectangular tubular case made of metal, resin, ceramic or the like, 2 is a hollow fiber bundle made of polysulfone semipermeable membrane, and 3 is made of thermosetting resin such as epoxy resin. It is a partition wall. The semipermeable membrane that constitutes the hollow fiber bundle 2 has a diameter of 0.3 μm or less, and more preferably has a fine membrane surface hole with a diameter of 0.1 to 0.2 μm. The tubular case 1 is partitioned by a partition wall 3 inside. A partition space 4 for supplying raw water is formed on one side. The hollow fiber bundle 2 is bent and housed in a U-shape in the partition space 4, and both ends of the hollow fiber bundle 2 are embedded in the partition wall 3 such that the hollow portion opens on the opposite side wall surface. The partition wall 3 is provided with pores 5 penetrating vertically, and the inside of the partition space 4 and the partition wall 3
Communicates with the upper surface side of.

The pores 5 can be formed by drilling or embedding a tube. This pore 5
May be configured to simply pass through the partition wall 3, but if necessary, a pipe line 6 is connected to the outlet side of the pore 5 as shown by a chain line, and an opening / closing valve 7 is provided in a portion extended outside the system. You may do it. Filter module 10 having the above configuration
In the filtration operation in, the raw water is supplied to the partition space 4 of the cylindrical case 1 as indicated by arrow A, and the raw water is fed into the hollow fiber bundle 2 of the semipermeable membrane.
It is filtered so as to flow out to the upper surface side of the partition wall 3 as indicated by arrow B.

The filter unit MODIMOL 10 is shown in FIG.
As shown in (1), a plurality of filters are combined to form the filter 40. In the filter 40 of FIG. 5, a plurality of filter modules 10 are arranged in parallel, and the upper and lower ends thereof are connected to the connector 2
It is configured by connecting with 0 and 30. This filter 40
Then, raw water is supplied to the connector 20 on the lower side as shown by an arrow A, dispersed and filtered in the plurality of filter modules 10, and then the filtered water flows out to the connector 30 on the upper side.

In the above filtering operation, when a small amount of air is mixed in the raw water itself, the mixed air is gradually accumulated in the upper part of the partition space 4 in the case of the conventional filter module, and the retention space S Are formed (see FIG. 6). However, in the case of the filter module 10 of the present invention, since the pores 5 are provided in the partition wall 3 so as to penetrate vertically, the air escapes upward through the pores 5, so that the retention space S Does not form.

The pores 5 that perform such an air venting action are
After manufacturing the filter module, it can be easily processed by a drill. Alternatively, when the partition wall 3 is molded with resin in the tubular case 1 when manufacturing the filter module, a tube may be embedded in the portion where the pores 5 are provided for processing. In the present invention, the pores 5 provided for venting air
The size is preferably in the range of 0.2 to 0.7 mm in diameter. The number of pores is not particularly limited as long as at least one is provided. However, if the number of pores is too large, the ratio of the raw water mixed in the filtered water without filtering increases, so that the practical filtering pressure (0.2
The total outflow amount of the raw water that passes through the pores at ˜3.0 kgf / cm ² ) should be within 0.5% of the total amount of the filtered water filtered by the hollow fiber bundle, and more preferably within 0.3%. It is desirable to set to.

As described above, when the pores 5 are simply processed, the raw water that has not been filtered from the pores 5 is mixed into the filtered water filtered by the hollow fiber bundle 2. . However, if the amount is extremely small, such as the above-mentioned setting, there is no particular problem. In order to avoid such a small amount of raw water from entering, as shown by the chain line in FIG. 1, a pipe line 6 extending outside the system is connected to the outlet side of the pore 5 and this is opened / closed by an opening / closing valve 7. It is better to let it flow out of the system.

In the present invention, the position where the pore 5 is provided in the partition wall 3 is not limited to the center as shown in FIG. 1, and any position can be selected as long as it is a position that penetrates the partition wall 3. You can Further, the position of the pores 5 is not necessarily limited to the partition wall 3 as long as it is a position where the air bleeding action can be performed, and as in the embodiment shown in FIG.
It may be provided on the wall surface of. In FIG. 2, it is provided at a position adjacent to the partition wall 3 located at the top of the partition space 4 with respect to the wall surface of the tubular case 1. Also in this case, the same effect as the embodiment of FIG. 1 can be obtained. Further, also in the case of the embodiment of FIG. 2, the conduit 6 and the on-off valve 7 can be provided on the outlet side of the pore 5.

In the embodiment of FIGS. 1 and 2, the hollow fiber bundle 2 is bent in a U shape and housed in the partition space 4. However, as in the embodiment of FIGS. 3 and 4, You may make it accommodate the hollow fiber bundle 2 in a substantially linear form. That is, FIG.
In the embodiment of FIG. 4, only one end of the hollow fiber bundle 2 is connected to the partition wall 3 and the other end is suspended so that the hollow end of the free end is closed with resin or adhesive. It is the one. Also in this case, the pores 4 are provided on the partition wall 3 in the example of FIG. 3 and on the wall surface of the cylindrical case 1 in the example of FIG. Further, also in the embodiments of FIGS. 3 and 4, the conduit 6 and the opening / closing valve 7 can be provided on the outlet side of the pores 5.

The filter module according to the present invention described above can be used in pool circulation filtration systems,
It can be used for various purposes such as a filtration system for water storage facilities in condominiums or a water purification system for ponds and lakes.

[0017]

As described above, according to the filter module of the present invention, the partition wall or the cylindrical case wall penetrates the partition wall for partitioning the inside of the cylindrical case or the cylindrical case wall of the raw water supply side partition space. Since at least one fine hole is provided as described above, the air mixed in the partition space can be discharged to the outside of the system through the fine hole, and the deterioration of the filtration performance can be prevented. Moreover, the pores can be processed by a simple operation such as drilling after processing the filtration module.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a filter module according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a filter module according to another embodiment of the present invention.

FIG. 3 is a vertical sectional view of a filter module according to still another embodiment of the present invention.

FIG. 4 is a vertical sectional view of a filter module according to still another embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view showing an example of a filter using the filter module of the present invention.

FIG. 6 is a vertical sectional view showing a conventional filter module.

[Explanation of symbols]

1 Cylindrical case 2 Hollow fiber bundle 3 Partition wall 4 Partition space 5 Pore 6 Pipe line 7 Open / close valve 10 Filter module

Claims (5)

[Claims] 1. A cylindrical case is partitioned by a partition wall, and a hollow fiber bundle made of a semipermeable membrane is housed in a partition space on the side of the raw water supply, and both ends of the hollow fiber bundle are hollowed in the partition wall. The inside of the hollow fiber bundle is embedded so as to open to the opposite side wall surface, or one end of the hollow fiber bundle is embedded in the partition wall so that the hollow inside is opened to the opposite side wall surface and the other end is closed. The filter module as described above, wherein the partition wall or the cylindrical case wall on the raw water supply side is provided with at least one fine hole penetrating the partition wall or the cylindrical case wall. 2. The filter module according to claim 1, wherein the diameter of the pores is 0.2 to 0.7 mm. 3. The filter module according to claim 1, wherein the total raw water amount passing through the pores is set within 0.5% of the total filtered water amount filtered by the hollow fiber bundle. 4. The filter module according to claim 1, wherein a conduit extending to the outside of the system is connected to the outlet side of the pore, and an opening / closing valve is provided in the conduit. 5. A filter comprising the filter module according to any one of claims 1 to 4.