JPH0699038A - Hollow fiber membrane module - Google Patents

Abstract

PURPOSE:To provide a hollow fiber membrane module easy in cleaning of the hollow fiber membrane, free from the disorder or damage of the hollow fiber membrane at the time of cleaning and suitable for industrial applications. CONSTITUTION:This hollow fiber membrane module is formed from a rod like supporting body 3 which is set at the center part of the hollow fiber membrane module and is integrally fixed to potting cases 7, 7' of the potting parts on both sides of the module, a hollow fiber membrane 1 which is arranged around the supporting body 3 and is potted at both sides and a dividing and binding part 4 of the hollow fiber membrane 1 provided at an intermediate part between the potting parts 7 and 7' on both ends. In the potting parts on both sides, the bundled hollow fiber membrane 1 is potted around the supporting body 3 in divided state and in the dividing and binding part 4 provided at the middle, the bundled hollow fiber membrane 1 is divided into the number of bundles of integral multiple of the divided number of the potting parts and is bound around the supporting body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow fiber membrane module used by incorporating it into a water purifier or the like. More specifically, the present invention relates to an industrial hollow fiber membrane module suitable for cleaning hollow fiber membranes.

[0002]

2. Description of the Related Art Generally, a liquid filter such as a water purifier using a hollow fiber membrane focuses one end or both ends of the hollow fiber membrane and fixes the focused end with a resin while maintaining the opening of the hollow fiber membrane. It is formed in an airtight manner integrally with the inner wall of the container, and the raw water is filtered through the hollow fiber membrane wall. As the filtration direction, there are an external pressure type that allows raw water to pass from the outside to the inside of the hollow fiber membrane, and an internal pressure type that allows the raw water to pass from the inside to the outside of the hollow fiber membrane, and tap water such as tap water from a household water purifier. It is used in a wide range of areas including purification of domestic wastewater such as sewage and industrial wastewater.

In recent years, in particular, strong attention has been paid to the purification of industrial water from the viewpoint of environmental protection and hygiene, and it has been used as an effective purification means for industrial water such as removal of organic substances in sewage and wastewater, and inorganic substances such as heavy metals. The use of water purifiers using porous hollow fiber membranes is increasing.

Unlike the case of purifying tap water such as tap water, such a water purifier for industrial use has a large clogging of the hollow fiber membrane during the filtration process, and therefore air is sent after the filtration process for a certain period of time. The membrane surface is repeatedly washed by vibrating the hollow fiber membrane to wash the membrane surface, or by passing treated water in the direction opposite to the filtration treatment.

[0005]

In the case of an ordinary industrial water purifier, the number of hollow fibers per unit area is increased and the hollow fibers are densely bundled in an attempt to make the filtration module compact and increase the filtration efficiency. Since the membrane area is increased, it becomes difficult for air and water to pass through when cleaning the membrane surface, so the washing is not performed sufficiently and the filtration efficiency gradually decreases.
This is the cause of shortening the module life.

As a solution to this problem, attempts have been made to facilitate cleaning of the membrane surface by making the module case into a basket shape. However, since the hollow fiber membranes are densely bundled during cleaning,
It is difficult to clean the inner membrane surface, and the effect is small in the case of filtration treatment with large dirt such as in the case of wastewater treatment.

It is also conceivable that the hollow fiber membrane is restrained only by the potting portion and the intermediate portion is opened, but the industrial module is large in shape and is difficult to handle, and the hollow fiber membrane is easily damaged. It is not preferable.

The present invention has solved the above problems, and an object of the present invention is to provide a hollow fiber membrane module suitable for industrial use, in which the hollow fiber membrane surface can be easily washed and which is excellent in handling. To do.

[0009]

SUMMARY OF THE INVENTION The gist of the present invention is a rod-shaped support body that is integrally fixed to the potting cases of the potting portions at both ends of the hollow fiber membrane module, and the support body of the support body. Hollow fiber membranes arranged around the periphery and potted at both ends, and split restriction portions of the hollow fiber membranes provided in the middle of the potting portions at both ends are formed. It is potted in a divided state around the support, and in the split restraint portion provided in the middle, the converged hollow fiber membrane is restrained around the support by being divided into an integral multiple of the number of divisions of the potting portion. Is a hollow fiber membrane module.

As the filtration method in the present invention, all known filtration methods such as total volume filtration, cross-flow filtration, suction filtration and the like are adopted.

[0011]

[Function] The hollow fiber membrane of the potting portion is converged in a divided form, and even if the volume is large and the number of bundles is large as in industrial use, the end portion of the potting portion does not become a dense converging portion,
When cleaning the membrane, the potting edge can be efficiently cleaned.

Further, since the module has a multi-divided restraint in the middle of the module, even a large module can be washed without disturbing the hollow fiber membrane in the middle when washing the membrane. The action extends to the inside.

Further, the support and the split restraint structurally protect the entire module, which makes it extremely easy to handle during storage and carrying.

[0014]

The present invention will be described in detail below with reference to the drawings.

The figure shows an example of the hollow fiber membrane module of the present invention. FIG. 1 is a longitudinal sectional view thereof, and FIG.
Is a cross-sectional view of the potting portion, FIG. 3 is a cross-sectional view of the split restraint portion, 1 is a hollow fiber membrane, 2 is a potting portion, 2 is a support, 4 is a split restraint portion, 5 is a split restraint portion. Board, 6
Is a restraint hole provided in the split restraint plate, 7, 7'is a potting case, 8 is a hollow portion of the support, and 9 is a split hole provided in the potting case.

In FIG. 1, a rod-shaped support 3 is located at the center of the hollow fiber membrane module, and potting portions 2 are formed at both ends of the bundled hollow fiber membrane 1.
It is fixed and integrally formed with the 2'potting case 7, 7 '. The support 3 may be made of any material as long as it has a strength capable of maintaining the shape of the hollow fiber membrane module, but it is premised on purification of a liquid containing an acid or alkali component,
From this point of view, it is preferably formed of a plastic that is chemically resistant and does not cause rust and the like, and the cross-sectional shape may be a rod shape such as a circle, a square, or a rectangle.

It is also possible to make the rod-shaped support 3 into a tubular shape such as a cylindrical shape and use the hollow portion 8 as a flow path for purified water.

The hollow fiber membrane 1 is arranged around the support body 3, both ends thereof are converged, and the converging ends are potted in a state of being divided around the support body 3. The division in this case can be easily performed by providing the potting case 7 with the division hole 9 as shown in FIG. Although the number of divisions is shown in FIG. 2 in the state of four divisions, it may be set appropriately as necessary. Further, as the hollow fiber membrane 1 used in the hollow fiber membrane module of the present invention, those having any film quality such as polyethylene type, polypropylene type and polysulfone type used for general water purification are used.

The material of the potting case 7, the resin used as the potting material, the potting method, and the like are not particularly limited as long as they are in accordance with the potting of the generally used hollow fiber membrane module.

In the hollow fiber membrane module of the present invention,
As shown in FIG. 1, a split restraint portion 4 is provided in the middle of the potting portions 2 and 2 ′ at both ends, and the hollow fiber membrane 1 that is split and potted is restrained individually in a further split state. ing. FIG. 3 shows an example of the split constraining portion 4, and the split constraining plate 5 has a potting portion 4
The 12 constraining holes 6 which are three times as large as the dividing holes 9 of
The hollow fiber membranes 1 that are provided so as to surround each of them are divided into four equal parts in the potting portion 4, and each of the hollow fiber membranes 1 is divided into 12 equal parts as a whole and is restricted by the restriction holes 6.

The number of the constraining holes 6 may be set as necessary within the range of an integral multiple of the number of the dividing holes 9, and the number of the dividing constraining plates 5 is not necessarily the number of dividing the hollow fiber membrane 1. It is not necessary to match them, and it is also possible to provide a large number of restraint holes 6 in the divided restraint plate 5 in advance and use the necessary number of divided restraint holes 6.

As the shape of the divided constraining plate 5, any shape such as a circle, a triangle, an ellipse, and a polygon can be used in addition to the quadrangle as shown in FIG. The material is preferably made of plastic for the same reason as the support 3 and the potting case 7 described above, and is preferably firmly joined and integrated with the support 3.

Further, in the present invention, by covering the entire outer periphery of the hollow fiber membrane 1 portion forming the hollow fiber membrane module with a net-like material, the disturbance of the hollow fiber membrane 1 can be more effectively performed. Can be prevented.

[0024]

INDUSTRIAL APPLICABILITY The hollow fiber membrane module of the present invention is industrially used because the hollow fiber membranes bundled at the ends are potted in a divided shape, and the middle portion is divided into a plurality of pieces and constrained. When it is used as a module requiring repeated washing, the membrane cleaning efficiency is high, and even a large module, the disorder of the hollow fiber membrane is small and the membrane is less damaged.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an example of a hollow fiber membrane module of the present invention.

FIG. 2 is a cross-sectional view of a potting portion of the hollow fiber membrane module of the present invention.

FIG. 3 is a cross-sectional view of a split restraint portion of the hollow fiber membrane module of the present invention.

[Explanation of symbols]

 1 hollow fiber membrane 2 2'potting part 3 support 4 split restraint part 5 split restraint plate 6 restraint hole provided in split restraint plate 7, 7'potting case 8 hollow part of support 9 provided in potting case Dividing hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Akira Hoshide Akira Hoshide 2-3-19 Kyobashi, Chuo-ku, Tokyo Mitsubishi Rayon Co., Ltd. (72) Inventor Yoshiro Sakata 2-3-3 Kyobashi, Chuo-ku, Tokyo Within Mitsubishi Rayon Co., Ltd.

Claims (2)

[Claims] 1. A rod-shaped support body which is integrally fixed to potting cases of potting portions at both ends of a hollow fiber membrane module, and a hollow which is arranged around the support body and potted at both ends. It is formed of a fiber membrane and a split restraint portion of the hollow fiber membrane provided in the middle of the potting portions at both ends. At the potting portions at both ends, the bundled hollow fiber membranes are potted in a divided state around the support. In the split restraint portion provided in the middle, the bundled hollow fiber membrane is restrained around the support by being divided into an integral multiple of the number of divisions of the potting portion. module. 2. The rod-shaped support body is formed in a tubular shape with an open end at the end of the potting portion.
Hollow fiber membrane module described