JPH06319962A - Hollow fiber membrane module, production thereof and filtration apparatus - Google Patents

Abstract

PURPOSE:To improve the performance of a hollow fiberlike membrane module without lengthening its membranes by a method wherein the hollow fiber-like membranes are arranged in a radial manner and the end parts of the hollow fiber-like membrane are sealed and fixed with a filling adhesive agent in a circular manner while being opened. CONSTITUTION:In a hollow fiber membrane module 1, a large number of hollow fiber membranes 2 are arranged in a radial manner and the end part of each of the membranes 2 is attached and fixed with a filling adhesive 3. During this time, the end part of each of the membranes 2 thus attached and fixed with the adhesive 3 is kept open. Since in this way the hollow fiber membrane 2 is not stretched lengthwise, a small flow amount of penetrating liquid is required and, consequently, resistance to filtration becomes small and the membrane area can be made larger.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a domestic water purifier, an industrial or medical filtering device, a hollow fiber membrane module used in the filtering device, and a method for producing the same.

[0002]

2. Description of the Related Art As a conventional hollow fiber membrane module of this type, there is, for example, the following one (actual fair 4-
(See Japanese Patent No. 33945). This hollow fiber membrane module is
In a so-called cylindrical hollow fiber membrane module, a bundle of a large number of hollow fiber membranes is housed in a cylindrical case so that at least one end of each hollow fiber membrane is open, and the end of each hollow fiber membrane is Is sealed and fixed by filling a filling adhesive between the hollow fiber membranes and between the hollow fiber membranes and the case at the open end of the case.

The cylindrical hollow fiber membrane module is suspended from a partition plate provided above the inside of the filtration tower, with the openings of the hollow fiber membranes as the upper portion, to form a filtration device.

[0004]

However, in the above-mentioned cylindrical hollow fiber membrane module of the prior art, when it is lengthened in the longitudinal direction, the flow rate of the permeate increases, resulting in an increase in filtration resistance. The inner diameter of the hollow fiber membrane was increased. As a result, the film area could not be increased. In addition, the length of each hollow fiber membrane imposes a load on each hollow fiber membrane, and the hollow fiber membrane is likely to be damaged.

As a method of washing each hollow fiber membrane, there is a method of utilizing bubbles, but if the hollow fiber membrane is long, it is difficult to obtain a uniform effect on the entire hollow fiber membrane. On the other hand, when the inner diameter of the hollow fiber membrane is increased, the sealing and fixing portion of the filling adhesive becomes large, which causes manufacturing problems such as shrinkage of the filling adhesive and heat generation. Also, since the number of hollow fiber membranes increases,
There are many defects.

The present invention has been made to solve the above-mentioned problems of the prior art, and an object thereof is to provide a hollow fiber membrane module capable of improving the performance without increasing the length of the hollow fiber membrane, It is to provide a manufacturing method and a filtering device.

[0007]

In order to achieve the above object, according to the present invention, a hollow fiber membrane module is provided with a large number of radially arranged hollow fiber membranes, and the hollow fiber membrane modules are arranged radially. A filling adhesive for annularly sealing and fixing the end of each hollow fiber membrane,
And each hollow fiber membrane bonded and fixed by the filling adhesive is opened.

[0008] Then, the manufacturing method is such that the hollow fiber membranes are wound radially, and the radial ends of each of the radially wound hollow fiber membranes are annularly sealed and fixed with a filling adhesive, and the filling is performed. After the adhesive is cured, the ends of each hollow fiber membrane are cut together with the filling adhesive to open each hollow fiber membrane.

Further, the filtration device using the hollow fiber membrane module is provided with a case for accommodating the hollow fiber membrane module, and the module is surrounded by the annular sealing fixing portion of the hollow fiber membrane module. A blocking section for blocking the central part and the outer periphery of the sealing and fixing part where the end of each hollow fiber membrane is opened is provided, and further, the case has an inflow / outflow port communicating with the central part of the module, and the sealing and fixing part. And an inflow / outflow port communicating with the outer peripheral portion of the.

[0010]

According to the hollow fiber membrane module and the method of manufacturing the same having the above-described structure, since the hollow fiber membranes are radially arranged,
The membrane area can be increased without increasing the length of the hollow fiber membrane. Further, by using the hollow fiber membrane module, it is possible to obtain a filtration device with good volume efficiency.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments. FIG. 1 shows a hollow fiber membrane module according to an embodiment of the present invention. In this hollow fiber membrane module 1, the hollow fiber membranes 2 are radially arranged to form a large number of hollow fiber membranes 2, and the ends of each of the radially arranged hollow fiber membranes 2 are annularly filled with a filling adhesive 3. The hollow fiber membranes 2 are sealed and fixed to the hollow fiber membranes 2 and the end portions of the hollow fiber membranes 2 bonded and fixed by the filling adhesive 3 are opened.
The hollow fiber membrane module 1 of FIG. 1 (a) is one in which the hollow fiber membranes 2 are arranged so as to radiate from substantially the center of the hollow fiber membrane module 1, and the hollow fiber of FIG. 1 (b), (c) The membrane module 1 has a hole 4 at approximately the center of the hollow fiber membrane module 1A.
And the hollow fiber membranes 2 are arranged radially through the holes 4.

In the hollow fiber membrane module having the above structure, since the hollow fiber membranes 2 are arranged radially, the hollow fiber membranes 2 are not elongated in the lengthwise direction, so that the flow rate of the permeate is small. I'm sorry. As a result, the filtration resistance is reduced, so that the inner diameter of the hollow fiber membrane 2 is not increased. As a result, the film area can be increased. In addition, since the hollow fiber membrane 2 does not become long in the length direction, the hollow fiber membrane 2
Since the burden on the hollow fiber membrane 2 is less likely to occur, the hollow fiber membrane 2 is less likely to be damaged. Furthermore, the hollow fiber membrane 2 is formed by utilizing bubbles or the like.
Since the length of the hollow fiber membrane 2 is not too long when washing, the uniform effect can be exerted on the entire hollow fiber membrane 2 in such a washing method.

Since the inner diameter of the hollow fiber membrane 2 does not increase, the sealing and fixing portion 5 of the filling adhesive 3 does not increase, so that the filling adhesive 3 shrinks and heat is generated during manufacturing. No problems will occur.

Next, a method of manufacturing the hollow fiber membrane module 1 having the above-mentioned structure according to an embodiment of the present invention will be described with reference to FIGS. 2 and 3.

First, the hollow fiber membrane 2 is wound around the core 6 shown in FIG. 2 radially as shown in FIG. The core 6 is a mesh-shaped annular member. The material may be vinyl chloride, polyethylene, polypropylene, etc. In particular, it is desirable to have the same quality as the hollow fiber membrane 2. Further, the member around which the hollow fiber membrane 2 is wound is not limited to the mesh-shaped annular member of the present embodiment, and in short, any shape that allows the hollow fiber membrane 2 to be wound radially can be used.

Next, the core 6 on which the hollow fiber membrane 2 is radially wound is mounted in the recess 71 formed in the potting cup 7 which is shown in FIG. To do. Then, in this state, it is rotated in the direction of the arrow in the figure.
Then, the filling adhesive 3 is poured into the potting cup 7. The filling adhesive 3 is filled in the circumferential portion of the core 6, that is, the radial end portion of each hollow fiber membrane 2 by centrifugal force. Therefore, the end of each hollow fiber membrane 2 is annularly sealed and fixed.

Finally, after the filling adhesive 3 is cured, the ends of the hollow fiber membranes 2 are cut together with the filling adhesive 3 to cut the hollow fiber membranes 2.
Is opened to complete a hollow fiber membrane module as shown in FIG.

According to the above manufacturing method, the hollow fiber membrane module can be easily manufactured only by using the core 6, the potting cup 7, and the like.

Then, a filtering device according to an embodiment of the present invention shown in FIG. 4 will be described.

The filtration device 11 is a cross-flow type filter, and is surrounded by a case 12 for accommodating the hollow fiber membrane module 1 and an annular sealing fixing portion 5 of the hollow fiber membrane module 1 provided in the case 12. Sealing and fixing part 5 in which the central part 13 of the module and the end of each hollow fiber membrane 2 open
The flange 14 and the plate 15 as a shutoff portion for shutting off the outer peripheral portion, the stock solution inlet 16 as an inflow / outflow port communicating with the module central portion 13 provided in the flange 14, and the sealing fixing portion 5 provided in the case 12. And a permeate outlet 17 communicating with the openings of the hollow fiber membranes 2 at the outer peripheral portion of.

The case 12 is a thin cylindrical member, both ends of which are closed, and a hole 12B having a diameter larger than that of the hollow fiber membrane module 1 mounted in the case 12 is formed substantially at the center of the bottom 12A. A hole 12C into which a stock solution outlet 18 for letting the stock solution flow out of the case 12 is formed is formed in the closed portion on the opposite side of the bottom part 12A.

The hole 12 in the bottom 12A of the case 12
The convex portion 14A of the flange 14 is fitted in B and the flange 14 is fixed to the case 12.
The hollow fiber membrane module 1 is placed on the end surface of the convex portion 14A. Further, a plurality of hollow fiber membrane modules 1 are coaxially provided on the hollow fiber membrane module 1 through a circular pressing member 19 having a hole 19A having substantially the same diameter as the central portion 13 of the module. A plate 15 for closing the entire hollow fiber membrane module 1 is provided on the end surface of the uppermost hollow fiber membrane module 1. Holes 19A and 15A are formed coaxially on both sides in the drawing on the outer side in the radial direction of the outer peripheral portion of the hollow fiber membrane module 1 of the pressing member 19 and the plate 15.

Further, a hole 14B is formed in the convex portion 14A of the flange 14 coaxially with the holes 19A and 15A, and a holding bolt 20 extending to the plate 15 is fitted and fixed in the hole 14B. .

Then, the holding member 20 is attached to the holding bolt 20,
The holes 19A, 15A of the plate 15 are inserted and tightened by the holding nuts 21 so that the hollow fiber membranes are inserted through the O-rings 22 provided between the sealing and fixing portion 5 of each hollow fiber membrane module 1 and the holding member 19. The modules 1 are laminated in a liquid-tight manner.

The flange 14 is provided with an undiluted solution inlet 16 for inflowing the undiluted solution opening toward the module central portion 13, while the plate 15 is provided with a undiluted solution opening toward the module central portion 13. An undiluted solution outlet 18 for flowing out to the outside of the case 12 is provided through a hole 12C of the case 12. Further, a permeate outlet 17 communicating with the inside of the case 12 is provided on the upper flange 23 provided on the upper part of the case 12.

In the filtration device 11 thus constructed, the stock solution flows to the central portion 13 of the module through the stock solution inlet 16, passes through the outside thereof, and passes through the stock solution outlet 18 to the case 12.
It is leaked to the outside. On the other hand, the permeated liquid is the central part 13
The permeated liquid flows out from the openings of the hollow fiber membranes 2 through the inside of the hollow fiber membranes 2, and the permeated liquid flows out through the permeated liquid outlet 17 through the inside of the case 12.

Since the hollow fiber membrane module 1 is used in the filtration device having the above structure, the volume efficiency is good. Further, since it is of the laminated type, the hollow fiber membrane 2 can be upsized without lengthening it as in the prior art, and the hollow fiber membrane module 1 can be separated from the filtration device 11. Since it can be divided in this way, it becomes easy to fix the sealing and fixing portion 5 with the filling adhesive 3, and even if a defect occurs, it is only necessary to replace a part. Further, bubble cleaning for blowing bubbles from the stock solution inlet 16 can be efficiently performed. In addition, the disposable filtering device is lost.

FIG. 5 shows another embodiment of the filtering device of the present invention. In the present embodiment, in order to prevent the concentrated liquid from depositing on the membrane surface of the hollow fiber membrane 2 in the central portion 13 of the module, the portion of the central portion 13 of the module between the hollow fiber membrane modules 1 is efficiently subjected to stirring and washing. The stirring blade 24 is provided in the above. Since other configurations and operations are the same as those in the first embodiment, the same reference numerals are given to the same components and the description thereof will be omitted.

Although the filtration device according to the present invention has been described in each embodiment by taking the laminated type hollow fiber membrane module according to the present invention as an example, a single layer type is also applicable.

[0030]

According to the present invention, according to the above hollow fiber membrane module and the method for manufacturing the same, since the hollow fiber membranes are radially arranged, the membrane area can be increased without lengthening the hollow fiber membranes in the longitudinal direction. Can be made bigger. In addition, since the hollow fiber membrane does not become longer in the length direction, the problem caused by making it longer does not occur, so that the performance can be improved. Furthermore, by using the hollow fiber membrane module, it is possible to obtain a filtration device with good volume efficiency.

[Brief description of drawings]

FIG. 1 shows a hollow fiber membrane module according to an embodiment of the present invention, and FIG. 1 (a) is a plan view of a hollow fiber membrane module in which hollow fiber membranes are radially arranged from substantially the center of the module. FIG. 2B is a plan view of a hollow fiber membrane module in which hollow fiber membranes are radially arranged through holes provided in a substantially central portion of the module, and FIG. ) Is a perspective view of FIG.

FIG. 2 is a plan view of a core.

FIG. 3 is a longitudinal sectional view of a main part showing a filling step.

FIG. 4 is a vertical cross-sectional view of a filter device according to an embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view of a filtering device according to another embodiment of the present invention.

[Explanation of symbols]

 1 Hollow Fiber Membrane Module 2 Hollow Fiber Membrane 3 Filling Adhesive 4 Hole 5 Sealing Fixing Part 6 Core 7 Potting Cup 71 Recess 11 Filtering Device 12 Case 12A Bottom 12B, 12C Hole 13 Module Central Part 14 Flange (Blocking Part) 14A Convex Portion 14B Hole 15 Plate (blocking portion) 15A Hole 16 Raw solution inlet 17 Permeate 18 Raw solution outlet 19 Holding member 19A Hole 20 Holding bolt 21 Holding nut 22 O-ring 23 Upper flange 24 Stirring blade

Claims (3)

[Claims] 1. A large number of hollow fiber membranes radially arranged,
A filling adhesive for sealing and fixing the end portions of the radially arranged hollow fiber membranes in a ring shape, and opening the end portions of the hollow fiber membranes adhered and fixed by the filling adhesive agent. Hollow fiber membrane module. 2. A hollow fiber membrane is wound radially, and radial ends of each of the radially wound hollow fiber membranes are annularly sealed and fixed with a filling adhesive, and after the filling adhesive is cured. A method for producing a hollow fiber membrane module, wherein each hollow fiber membrane is opened by cutting an end of each hollow fiber membrane together with a filling adhesive. 3. A case for accommodating the hollow fiber membrane module according to claim 1 is provided, and in the case, a module central portion surrounded by an annular sealing and fixing portion of the hollow fiber membrane module and each hollow fiber. A blocking part is provided to block the outer periphery of the sealing and fixing part where the end of the membrane opens, and further, the case has an inflow / outflow port communicating with the central part of the module and an outflow communicating with the outer peripheral part of the sealing and fixing part. A filtering device having an inlet port and an inlet port, respectively.