JPH057326U - Hollow fiber membrane module - Google Patents

Abstract

(57) [Summary] [Purpose] The hydrophilic hollow fiber membrane for filtration and the hydrophobic porous body for degassing are prevented from being crushed even when a high pressure is applied to improve pressure resistance. A hollow structure in which a large number of hydrophilic porous hollow fiber membranes 4 for filtering an aqueous liquid and a hydrophobic microporous body 5 for removing gas accumulated in the module case 3 are housed in a module case 3. In the fiber membrane module, the hydrophilic hollow fiber membrane 4 is provided in the hollow portion 42 of the hydrophilic hollow fiber membrane 4 with a porous node portion 4
3 is provided, and the hydrophobic microporous body 5 is formed into a solid structure or has a hollow section provided with a porous node portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention is a hollow fiber membrane module for aqueous liquid filtration used in, for example, a water purifier. Concerning the structure of Le.

[0002]

[Prior art]

  As a conventional full-volume filtration type hollow fiber membrane module for this type of aqueous liquid filtration, For example, there are those shown in FIGS. 4 (a) and 4 (b). That is, this hollow fiber membrane module In the module case 100, at least a part of the film surface is covered with the hydrophobic part 10. 5, the hydrophobic porous hollow fiber membrane 102 and the hydrophilic porous hollow fiber membrane 101 are collected. It is stored and its end is fixed by the same potting material 104, as shown in FIG. 6 (a). It has a U-shape as shown, or a structure to seal the other end as shown in Fig. 6 (b). ing. A hydrophilic porous hollow fiber membrane 101 is provided inside the module case 100. Only the hydrophobic hollow fiber membrane 102 is provided.

[0003]   When gas is mixed in from the inflow side of the aqueous liquid, it is placed all around the outer circumference. The gas inside the module case 100 is prevented by the hydrophobic porous hollow fiber membrane 102 that is formed. I'm supposed to pull out.

[0004]

[Problems to be solved by the device]

  However, in the case of the above-mentioned conventional technique, the hydrophilic porous hollow fiber membrane 101 and And the hydrophobic porous hollow fiber membrane 102 is a hollow fiber, which is a kind of plastic tube. Therefore, when the water pressure is high, the hydrophilic porous hollow fiber membrane 101 is crushed and There is a problem that the filtration efficiency of the aqueous porous hollow fiber membrane 101 is reduced.

[0005]   Further, the hydrophobic porous hollow fiber membrane 102 is also crushed in the same manner to obtain the hydrophobic porous hollow fiber membrane 1. There was also a problem that the efficiency of venting air from 02 deteriorates. Therefore, a relatively large number The hydrophobic porous hollow fiber membrane 102 must be placed in the case, and for example, In order to cope with the increase in force, the outer periphery and the inside of the bundle of hydrophilic porous hollow fiber membranes 101 are In addition, 0.2% to 10% of the number of the hydrophilic porous hollow fiber membranes 101 has many hydrophobic pores. A bundle of quality hollow fiber membranes 102 was required.

[0006]   The present invention was made in order to solve the above-mentioned problems of the prior art. As a result, even if a high pressure is applied, the filtering member and the gas removing member are crushed. It is to provide a hollow fiber membrane module having high pressure resistance by preventing such a phenomenon.

[0007]

[Means for Solving the Problems]

  In order to achieve the above object, according to the present invention, a large number of The hydrophilic microporous body for filtering the aqueous liquid of the book and the gas accumulated in the module case are removed. A hollow fiber membrane module containing a hydrophobic microporous body for protecting the hydrophilic A hollow part is formed in the microporous body, and a porous node part is provided in the hollow part. It is characterized in that the porous body has a solid structure.

[0008]   In addition, a structure in which a hollow part is formed in the hydrophobic microporous body and a porous node part is provided in the hollow part It may be done.

[0009]

[Action]

  In the hollow fiber membrane module having the above structure, the hollow portion of the hydrophilic porous hollow fiber membrane is Since the node is provided, it can be supported and crushed by this node even when high pressure is applied. Absent. Therefore, the amount of aqueous liquid passing through the hydrophilic porous hollow fiber membrane is high even at high pressure. The filtration efficiency can be increased without decreasing.

[0010]   In addition, the hydrophobic porous body has a solid or hollow portion having a knot portion. As a result, there is no risk of crushing even at high pressure and air etc. Filtration efficiency can be improved by reducing the number of aqueous porous bodies.

[0011]

【Example】   The present invention will be described below based on the illustrated embodiment. According to an embodiment of the present invention 1 to 3 showing the empty fiber membrane module, 1 is the entire hollow fiber membrane module Shows. This hollow fiber membrane module 1 is a total filtration type and has a cylindrical shape with a bottom Is a case 3 in which a plurality of ports 2 are formed, and A few bundles of hydrophilic microporous material 4 for filtration, and a solid type hydrophobic microporous material for removing air. It is composed of a porous body 5.

[0012]   The hydrophilic microporous body 4 has a bamboo-shaped cross section as shown in FIG. The outer peripheral portion 41 of the hydrophilic microporous body 4 has 0.1 to 0 leading from the outer peripheral wall to the inner peripheral wall. ． A large number of 04 micron pores are formed over the entire length.

[0013]   In addition, the inner diameter of the outer peripheral portion 41 is hollow, and the hollow portion 42 A node 43 is provided which separates the hollow portion 42 with a space. This node 43 is It is integrally formed with the peripheral portion 41, and the central portion is formed to have the smallest wall thickness. Mo In addition, the knot 43 need not have the thinnest center as described above, and various shapes can be selected. You can

[0014]   The inside of the node 43 is provided with a large number of fine holes 45 of 1 micron or more. It is a porous body and is configured so that the hollow portions 42 communicate with each other through the fine holes 45. Has been done.

[0015]   In addition, the hydrophilic microporous body 4 uses the entire surface including the inner peripheral wall and the node portion 43 as a surfactant. More hydrophilic treatment is applied.

[0016]   On the other hand, as shown in FIG. 3, the hydrophobic microporous body 5 has a solid interior and a large number of micropores 51. The thread-like microporous body provided has the micropores 51 connected to each other, and allows the flow of gas such as air. It is structured to allow communication.

[0017]   And, the bundle of the bamboo-shaped hydrophilic microporous body 4 having the node portion 43 is U-shaped. The hydrophobic microporous body 5 is bent into a U-shaped hydrophilic microporous body 4 Of the module case 3 is arranged outside the bundle of Then, both ends 44 and 52 of the bundle of hydrophilic microporous body 4 and the hydrophobic microporous body 5 are modulated. It is fixed to one opening end of the casing 3 by a potting material 7.

[0018]   The hydrophilic microporous body 4 and the hydrophobic microporous thread 5 are attached to the end face of the potting portion 7. The terminals 44 and 52 are configured to be opened. In addition, 8 in the figure indicates It is a sealing member such as an O-ring for sealing with the other mating mounting member.

[0019]   In the hollow fiber membrane module having the above-mentioned configuration, the plug provided at the bottom of the module case If air enters the case 3 at the same time as raw water through the port 2, the air will It easily collects near the inner wall of the module case 3 and its air is attached to the inner wall of the module case 3. The hydrophobic microporous body 5 provided near the terminal 52 is pulled out of the module case 3.

[0020]   Even if the module case 2 is used under high pressure, the hydrophilic Since the porous body 4 is provided with the node portion 43 inside, it is less likely to be crushed by external pressure. As a result, water-based liquids such as water are more likely to pass through and flow rate reduction is reduced compared to conventional technology. To be done.

[0021]   Further, since the hydrophobic microporous body 5 has a solid inside, it is also crushed by pressure. The gas such as air smoothly escapes and functions normally.

[0022]   The hydrophobic microporous body 5 has the same internal structure as the hydrophilic microporous body 4 described above. A hollow part is formed and a porous node part is provided in the hollow part so as to face the external pressure. It may be a boom shape.

[0023]   Although the above embodiment has been described by taking the U-shaped hollow fiber membrane module as an example. A hollow fiber membrane module with one end potted as shown in FIG. 4 (b) of the prior art. The same applies to hollow fiber membrane modules that pot on both sides. Can be applied to.

[0024]

[Effect of device]

  The present invention has the above-described configuration and operation, and has a hydrophilic microporous body inside. The structure has a node in the empty space, and the hydrophobic microporous body has a node in the solid or hollow part. Since it has been configured, there is no risk of crushing even when high pressure is applied as in the past. In addition, it can be used for pressure resistance.

[0025]   In addition, even if used in a general water pressure state, the hydrophilic microporous body may be affected by pressure during abnormal conditions. Also, there is no fear that the hydrophobic microporous body will be deformed and crushed and will not be reproduced. And reliability is improved.

[Brief description of drawings]

FIG. 1 shows a hollow fiber membrane module according to an embodiment of the present invention. FIG. 1 (a) is a top view and FIG. 1 (b) is a longitudinal sectional view.

FIG. 2 is a longitudinal sectional view of an essential part of the hydrophilic microporous body of FIG.

3 is a cross-sectional view of the hydrophobic microporous body of FIG.

FIG. 4 shows a conventional hollow fiber membrane module. FIG. 4 (a) is a vertical cross-sectional view showing a U-shaped hollow fiber membrane module, and FIG. 4 (b) is a type in which one end is potted. It is a longitudinal cross-sectional view of the hollow fiber membrane module.

[Explanation of symbols]

1 Hollow fiber membrane module 2 ports 3 cases 4 Hydrophilic microporous body 41 Outer periphery 42 hollow 43 nodes 44 terminals 45 fine holes 5 Hydrophobic microporous body 51 Micropore 52 terminals 6 potting section 7 potting material 8 Seal member

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Creator Toshihisa Hirai             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Creator Toru Watanabe             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company

Claims (2)

[Scope of utility model registration request] 1. A hollow fiber membrane module having a module case containing a large number of hydrophilic microporous bodies for filtering an aqueous liquid and a hydrophobic microporous body for removing gas accumulated in the module case. A hollow fiber membrane module, characterized in that a hollow portion is formed in the hydrophilic microporous body, a porous node portion is provided in the hollow portion, and the hydrophobic microporous body has a solid structure. 2. The hollow fiber membrane module according to claim 1, wherein the hydrophobic microporous body is replaced with a solid structure to form a hollow portion and a porous node portion is provided in the hollow portion.