JPH0563632U - Hollow fiber membrane filter - Google Patents

Abstract

(57) [Summary] [PROBLEMS] The present invention relates to a hollow fiber membrane filter, which secures the surface area of the hollow fiber membrane so that the function of the hollow fiber membrane is sufficiently exerted and the substance to be filtered between the hollow fiber membranes is The purpose is to prevent blockage. A hollow fiber membrane filtering member having a plurality of hollow fiber membranes having both ends or one end open in a row and having both ends supported and fixed by a mold and having a filtrate passage communicating with the plurality of hollow fiber membranes, The filtration liquid passages are connected at predetermined intervals and are connected to each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hollow fiber membrane filter.

[0002]

[Prior Art]

 Hollow fiber membranes are known as permeable membranes for, for example, microfiltration and ultrafiltration. Conventionally, as a filtration device using this hollow fiber membrane, for example, one disclosed in Japanese Utility Model Publication No. 3-50975 is known.

In this type of hollow fiber membrane filter, a large number of hollow fiber membranes having both ends fixed and sealed in an outer cylinder with an adhesive are used. When the undiluted solution is filtered through a permeable membrane such as microfiltration and ultrafiltration using this type of hollow fiber membrane filter, substances that do not permeate the membrane gather on the membrane surface (called concentration polarization), and eventually. It forms a gel-like substance which reduces the filtration rate of the membrane.

In a normal membrane separation operation, cross filtration (cross flow filtration) is carried out as a method of suppressing concentration polarization and formation of a gel layer and efficiently performing filtration. In this method, the undiluted solution is caused to flow over the surface of the membrane at a high speed to create a turbulent state to reduce the concentration gradient on the membrane surface and prevent the development of a gel layer.

Therefore, the conventional hollow fiber membrane filter enables long-term use by cross filtration.

[0006]

[Problems to be solved by the device]

 However, in the conventional hollow fiber membrane filter, since many hollow fiber membranes are bundled and fixed, the surface area per one is not used effectively.

Further, since many hollow fiber membranes are bundled and fixed, there is a problem that the substance to be filtered is easily clogged between the hollow fiber membranes. Further, since a large number of hollow fiber membranes are bundled and fixed, in the case of external pressure filtration, in order to permeate the cleaning air into the hollow fiber membranes, for example, Japanese Utility Model Publication No. 3-50975. As disclosed in 1), it is necessary to form an air introduction path, which results in a complicated structure.

Further, since a large number of hollow fiber membranes are bundled and fixed, it is difficult for the undiluted solution flowing at a high speed to sufficiently spread during filtration by cross-filtration, which prevents the development of a gel layer. Was incomplete.

The present invention has been made to solve such conventional problems, and an object thereof is to secure the surface area of the hollow fiber membrane to sufficiently exhibit the function of the hollow fiber membrane and to perform the function of the hollow fiber membrane. Another object of the present invention is to provide a hollow fiber membrane filter capable of preventing the substance to be filtered from clogging in the space.

[0010]

[Means for Solving the Problems]

 The hollow fiber membrane filter according to the present invention has a large number of hollow fiber membranes with both ends or one end open in a row, and both ends are supported and fixed by a formwork, and a filtrate passage communicating with the plurality of hollow fiber membranes is provided. The hollow fiber membrane filtering members provided are continuously provided at a predetermined interval, and each filtrate passage is connected.

[0011]

[Action]

 In the present invention, the undiluted solution permeates a large number of hollow fiber membranes, the filtered solution flows into the filtered solution passages of the hollow fiber membrane filtering member, and flows out to the collecting section via the respective filtered solution passages.

[0012]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a hollow fiber membrane filter according to an embodiment of the present invention. In the figure, 10 denotes a hollow fiber membrane filtering member.

In this hollow fiber membrane filtering member 10, a large number of hollow fiber membranes 11 having openings 111 and 112 are arranged in a line, and both ends 12 and 13 are sandwiched between molds 14 and 15 and fixed with an adhesive 20. Frame members 16 and 17 having a substantially U shape are attached to both ends of the mold frames 14 and 15, and filtrate passages 18 and 19 are formed in the frame members 16 and 17, respectively.

As shown in FIGS. 2 and 4, the molds 14 and 15 have a frame shape, and the horizontal frame members 141 and 152 have concave portions 141a for supporting and fixing the hollow fiber membranes 11 in a row. And 152a are formed.

Inside the horizontal frame members 142 and 151, mounting portions 142a and 151a for supporting and fixing the hollow fiber membranes 11 in a row are formed. As shown in FIGS. 4 and 8, the molds 14 and 15 are provided with protrusions 143a, 144a and 153a, 154a on the vertical frame members 143, 144 and 153, 154, respectively.

Further, as shown in FIGS. 3 to 7, the frame members 16 and 17 include cutouts 141 b, 142 b and 151 b, which are provided in the horizontal frame members 141, 142 and 151, 152 of the form frames 14, 15, respectively. It is adapted to be fitted to 152b.

The frame member 16 is provided with a filtrate communication passage 21 that communicates with the filtrate passages 18 and 19. Next, in the present embodiment thus constituted, first, as shown in FIG. 4, a large number of hollow fiber membranes 11 are aligned in a line and arranged on the concave portion 141a and the mounting portion 142a of the form 14.

After that, the mold 15 is overlaid on the mold 14. At this time, the large number of hollow fiber membranes 11 have such a length as to project from the lateral frame members 141, 142 and 151, 152 of the molds 14, 15.

The hollow fiber membranes 11 sandwiched by the horizontal frame members 141, 142 and 151, 152 of the molds 14, 15 are attached to the horizontal frame members 141, 142 of the molds 14, 15 and After bonding and fixing with 151 and 152 by the adhesive agent 20, the upper and lower ends of the hollow fiber membranes 11 are cut to open the terminals 111 and 112.

Thereafter, as shown in FIG. 4, frame members 16 and 17 are attached to the positions of the upper and lower terminals 111 and 112 of the large number of hollow fiber membranes 11. As shown in FIG. 5, these are also fixed to the horizontal frame members 141, 142 and 151, 152 of the molds 14, 15 and the vertical frame members 143, 144 and 153, 154 by the adhesive 20.

As shown in FIG. 6, on the lower side of the frame member 16, the hollow fiber membrane 11 is supported and fixed by being sandwiched between the recessed portion 141a and the mounting surface 151a. Although not shown, the hollow fiber membrane 11 is also supported and fixed above the frame member 17 by being sandwiched between the recess 152a and the mounting surface 142a.

According to the above procedure, the hollow fiber membrane filtering member 10 is sequentially formed. Then, as shown in FIG. 1, the hollow fiber membrane filtering members 10 are connected to each other through spacers 2 having a predetermined length for keeping an unsupported space for the undiluted solution to pass through, and the respective filtering devices are also connected. The hollow fiber membrane filter 1 can be obtained by connecting the liquid communication passages 21.

According to the hollow fiber membrane filter 1 thus configured, when this is immersed in the container containing the stock solution and the path communicating with the filtrate communication passage 21 is sucked, a large number of the stock solution becomes hollow. The filtered liquid permeates the fiber membrane 11, flows into the filtered liquid passages 18 and 19 of the hollow fiber membrane filtering member 10, and flows out to the collecting portion via the filtered liquid communication passage 21.

According to the hollow fiber membrane filter 1 according to the present embodiment configured as described above, each hollow fiber membrane filtering member 10 arranges a large number of hollow fiber membranes 11 in a row to form a set of molds. Since the hollow fiber membranes 11 and 14 are sandwiched and fixed by the adhesive 20, the entire circumference of each hollow fiber membrane 11 is immersed in the undiluted solution, and the surface area of the hollow fiber membranes 11 can be sufficiently secured.

Further, according to this hollow fiber membrane filter 1, since the hollow fiber membranes 11 are not bundled as in a conventional hollow fiber membrane filter using a hollow fiber membrane, a liquid containing a suspended substance is formed. On the other hand, it becomes possible to obtain an external pressure type hollow fiber membrane module with less clogging.

Furthermore, since both ends of the hollow fiber membrane 11 are cut after being fixed by an adhesive, there is no problem that the hollow fiber membrane 11 is blocked during assembly. Further, the hollow fiber membrane filtering member 10 is formed by assembling a pair of molds 14 and 15 having the same shape and mounting the frame members 16 and 17 on the upper and lower sides, so that the structure is simple and the manufacturing is easy. Is.

Further, in this embodiment, since the frame member 17 is also provided with the filtrate passage 19, the pressure in the system becomes uniform when the hollow fiber membrane 11 is backwashed and regenerated, and the regeneration treatment is performed efficiently. You can

Furthermore, in this embodiment, since the hollow fiber membranes 11 are not bundled as in the conventional hollow fiber membrane filter using the hollow fiber membranes, the gel-like substance removed during regeneration is adjacent to the hollow fiber membrane. There is no risk of reattachment to the fiber membrane or blockage between adjacent hollow fiber membranes, and the regeneration process is performed efficiently.

Further, in the present embodiment, the hollow fiber membrane filtering member 10 is formed by assembling a pair of molds 14 and 15 having the same shape and mounting the frame members 16 and 17 on the upper and lower sides. Therefore, it is possible to endure even when the hollow fiber membrane filter 1 is vibrated and used.

In the above embodiment, the length is about 15 to 20 cm and the width is about 30 to 60 cm. However, when the horizontal width is increased, it is preferable to additionally provide a presser in the horizontal direction in order to enhance the stability of the hollow fiber membrane 11.

In the above embodiment, the case where the filtrate communication passage 21 is attached to the frame member 16 in advance has been described. However, the frame member 16 is provided with a hole for attaching the filtrate communication passage 21, After the hollow fiber membrane filtration member 10 is assembled, the filtrate communication passage 21 may be attached.

Further, in the above embodiment, the case where the filtrate communication passage 21 is attached to the frame member 16 has been described, but the filtrate communication passage 21 may be attached to the frame member 17, or alternatively, the frame members 16 and 17 may be attached. It can also be attached to.

Further, in the above embodiment, the case where both ends 111 and 112 of the hollow fiber membrane 11 are opened has been described, but only the end 111 or 112 may be opened. Further, in the above-described embodiment, a large number of hollow fiber membranes 11 are aligned in a row and arranged in the recesses 141a and 142a of the mold 14, and then the mold 15 is overlapped, and then the horizontal frame members 141 of the molds 14 and 15 are formed. Although it was adhered together with 142 and 151, 152 by the adhesive 20, after preliminarily aligning a large number of the hollow fiber membranes 11 in a line, both ends are temporarily fixed with the adhesive, and this is fixed by the molds 14, 15. It may be sandwiched.

FIG. 9 shows a modified example of the molds 14 and 15, in which the mold 14 having the protrusions 143a and 144a is provided with the protrusions 145a and the molds having the protrusions 153a and 154a. Protrusions 155a are provided on the frame 15, and both sides of the hollow fiber membrane filtration member 10 are closed by abutting the opposing surfaces of the protrusions 145a and 155a.

In this case, since the undiluted solution does not flow in from both sides, the hollow fiber membranes 11 on both sides are not subjected to an excessive force.

[0036]

[Effect of the device]

 As described above, according to the present invention, since a hollow fiber membrane filtering member in which a large number of hollow fiber membranes are arranged in a row and both ends are supported and fixed by a frame is used, a filtration formed by bundling conventional hollow fiber membranes is used. The surface area of the hollow fiber membranes can be effectively used as compared with a container, and the substance to be filtered can be prevented from being blocked between the hollow fiber membranes.

Further, since a hollow fiber membrane filtering member in which a large number of hollow fiber membranes are arranged in a row and both ends thereof are supported and fixed by a mold is used, compared to a conventional filter formed by bundling hollow fiber membranes. , It can be regenerated properly and can be used stably for a long time.

[Brief description of drawings]

FIG. 1 is a perspective view showing a hollow fiber membrane filter according to an embodiment of the present invention.

FIG. 2 is a perspective view of a hollow fiber membrane filtering member in FIG.

3 is a vertical cross-sectional view taken along line 3-3 of FIG.

4 is an exploded perspective view of the hollow fiber membrane filtering member in FIG.

5 is a cross-sectional view taken along line 5-5 of FIG.

6 is a cross-sectional view taken along line 6-6 of FIG.

7 is a cross-sectional view taken along line 7-7 of FIG.

FIG. 8 is a side view of FIG.

9 is a side view showing a modified example of the mold of FIG. 2. FIG.

[Explanation of symbols]

 1 Hollow Fiber Membrane Filter 10 Hollow Fiber Membrane Filtration Member 11 Hollow Fiber Membrane 111, 112 Ends 12, 13 Ends of Hollow Fiber Membrane 14, 15 Form Frame 18, 19 Filtrate Passage

Claims (1)

[Scope of utility model registration request] 1. A hollow fiber membrane filtering member having a large number of hollow fiber membranes having both ends or one end open in a row, both ends being supported and fixed by a formwork, and having a filtrate passage communicating with the many hollow fiber membranes. The hollow fiber membrane filter is characterized in that the filter liquids are continuously connected at a predetermined interval, and each filtrate passage is connected.