JP3200190B2 - Hollow fiber membrane module - Google Patents

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 in a water purifier or the like. More specifically, the present invention relates to an industrial hollow fiber membrane module suitable for cleaning a hollow fiber membrane.

[0002]

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

In particular, in recent years, there has been a strong interest in purifying industrial water from the viewpoints of environmental protection and hygiene, and as an effective purification means for industrial water, such as removal of inorganic substances such as organic substances and heavy metals in sewage and wastewater. Use of water purifiers using porous hollow fiber membranes is increasing.

In such an industrial water purifier, unlike the case of purifying tap water such as tap water, the clogging of the hollow fiber membrane at the time of the filtration process is large. The membrane surface is washed repeatedly by vibrating the hollow fiber membrane to wash the membrane surface or passing treated water in the opposite direction to the filtration process.

[0005]

In the case of a conventional industrial water purifier, the number of hollow fibers per unit area is increased and the hollow fibers are densely arranged in a bundle in order to make the filtration module compact and increase the filtration efficiency. Because the membrane area is large, air and water are difficult to pass when cleaning the membrane surface, washing is not performed sufficiently, the filtration efficiency gradually decreases,
This is a cause of shortening the life of the module.

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

It is also conceivable that the hollow fiber membrane is restrained only by the potting part and the intermediate part is made open. However, the industrial module is difficult to handle due to its large size, and the hollow fiber membrane is easily damaged. Is not preferred.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a hollow fiber membrane module which is easy to clean the surface of the hollow fiber membrane and is excellent in handling and suitable for industrial use. Is what you do.

[0009]

SUMMARY OF THE INVENTION The gist of the present invention is to provide a rod-shaped support which is located at the center of a hollow fiber membrane module and is integrally fixed to a potting case at both end potting portions, It is formed of a hollow fiber membrane disposed around and potted at both ends, and a divisional restraint portion of the hollow fiber membrane provided at two intermediate positions between the potting portions at both ends. The bundled hollow fiber membranes are potted in a divided state around the support, and in the division restraining portion of the hollow fiber membrane provided in the middle, the focused hollow fiber membranes are potted around the support. Divided into integer multiples of the number of divisions and wider than the potting area
A hollow fiber membrane module characterized by being restrained by being held. It is.

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

[0011]

[Function] The hollow fiber membrane of the potting section is bundled in a divided shape, so that even in the case of a large capacity and a large number of bundles such as those for industrial use, the end of the potting section does not become a dense bundle section.
When cleaning the membrane, it is possible to efficiently clean the potting end.

Also, the module has a multi-divided restraining portion in the middle of the module, so that 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.

[0013] Further, the support and the division restricting portion structurally protect the whole module, and handling in storage, carrying and the like becomes extremely easy.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an example of the hollow fiber membrane module of the present invention. FIG. 1 is a longitudinal sectional view of FIG.
Is a cross-sectional view of the potting portion, and FIG. 3 is a cross-sectional view of the split restricting portion, where 1 is a hollow fiber membrane, 2 'is a potting portion, 3 is a support, 4 is a split restricting portion, and 5 is a split restricting portion. Board, 6
Denotes a restraining hole provided in the split restraint plate, 7, 7 'denote a potting case, 8 denotes a hollow portion of the support, and 9 denotes 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 has potting portions 2 formed at both ends of a bundled hollow fiber membrane 1.
It is fixed to and integrally formed with the 2 'potting cases 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 is premised on purifying a liquid containing an acid or an alkali component.
From that viewpoint, it is preferable to be formed of a plastic having chemical resistance and no rust or the like, and the cross-sectional shape may be a rod shape such as a circle, a square, or a rectangle.

The rod-shaped support 3 may be formed in a tubular shape such as a cylindrical shape, and the hollow portion 8 may be used as a flow path for purified water.

The hollow fiber membrane 1 is arranged around the support 3, the both ends of the hollow fiber membrane 1 are focused, and the focused end is divided around the support 3 and potted. The division in this case can be easily made by forming the potting case 7 with the division holes 9 as shown in FIG. The number of divisions is shown in FIG. 2 in a four-part state, but may be set as needed. Further, as the hollow fiber membrane 1 used in the hollow fiber membrane module of the present invention, an arbitrary film type such as a polyethylene type, a polypropylene type, and a polysulfone type generally used for water purification or the like is 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 a generally used hollow fiber membrane module.

In the hollow fiber membrane module of the present invention,
As shown in FIG. 1, a split restraining portion 4 is provided between the potting portions 2 and 2 'at both ends, and the split and potted hollow fiber membrane 1 is further restrained individually in a further split state. ing. FIG. 3 shows an example of the division restricting portion 4.
Twelve restraining holes 6 which are three times as large as the dividing holes 9 of the support 3
The hollow fiber membrane 1 divided into four at the potting portion 4 is divided into three equal parts, and is restrained by the restraining holes 6 in a state of being equally divided into twelve as a whole.

The number of the constraining holes 6 may be set as necessary within an integral multiple of the number of the division holes 9, and the number of holes of the division constraining plate 5 is not necessarily limited to the number of divisions of the hollow fiber membrane 1. It is not necessary to match, and it is also possible to provide a large number of restriction holes 6 in advance in the division restriction plate 5 and use the required number of division restriction holes 6.

As the shape of the dividing constraint plate 5, any shape such as a circle as shown in FIG. 3, a circle, a triangle, an ellipse, and a polygon can be used. 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 tightly bonded and integrated with the support 3.

In the present invention, the entire outer periphery of the hollow fiber membrane 1 forming the hollow fiber membrane module is covered with a net-like material, so that the disturbance of the hollow fiber membrane 1 can be more effectively prevented. Can be prevented.

[0024]

According to the hollow fiber membrane module of the present invention, since the hollow fiber membrane bundled at the end is divided and potted, and the middle part is divided into a large number and restrained, the hollow fiber membrane module is used for industrial applications. When the module is used as a module requiring repeated washing, the membrane washing efficiency is large, and even if the module is a large module, the disturbance of the hollow fiber membrane is small and the module is less damaged.

[Brief description of the drawings]

FIG. 1 is a longitudinal 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 division restricting portion of the hollow fiber membrane module of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 hollow fiber membrane 2, 2 ′ potting part 3 support 4 divided restraint part 5 divided restraint plate 6 restraint holes provided in divided restraint plate 7, 7 ′ potting case 8 hollow part of support 9 provided in potting case Division hole

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akira Hoshide 2-3-1-19 Kyobashi, Chuo-ku, Tokyo Inside Mitsubishi Rayon Co., Ltd. (72) Inventor Yoshiro Sakata 2-3-19 Kyobashi, Chuo-ku, Tokyo Mitsubishi Examiner in Rayon Co., Ltd. Koichi Nakano (56) References JP-A-1-307408 (JP, A) JP-A-1-168305 (JP, A) JP-A-3-242230 (JP, A) JP-A-3 −254821 (JP, A) Actually open 1987-6-1705 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B01D 53/22 B01D 61/00-65/10 C02F 1/44

Claims (2)

(57) [Claims] 1. A rod-shaped support which is fixed at the center of a hollow fiber membrane module and integrally with a potting case of a potting portion at both ends, and a hollow member arranged around the support and potted at both ends. The hollow fiber membrane is formed of a fiber membrane and two hollow fiber membrane splitting and restraining portions provided at intermediate positions between the potting portions at both ends. In the potting portions at both ends, the focused hollow fiber membrane is divided around the support. In the hollow fiber membrane division constraint portion provided in the middle, the bundled hollow fiber membrane is divided around the support by an integral multiple of the number of divisions of the potting portion , and
A hollow fiber membrane module, wherein the hollow fiber membrane module is wider and constrained than the wing portion . 2. The rod-shaped support body is formed in a tubular shape with an open end at an end of the potting portion.
The hollow fiber membrane module according to the above.