JP2718852B2 - Hollow fiber membrane filter device - 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 filter device useful as a fine filter, an ultrafilter or a reverse osmosis filter.

[0002]

2. Description of the Related Art Hollow fiber membranes are widely used in various types of membrane separation devices because they have a fine ring shape in cross section, can have a large membrane area per unit volume, and are excellent in pressure resistance. Have been.

[0003] A number of these hollow fiber membranes are assembled together and sealed at both ends, or a module is formed by sealing and fixing the open end side in a state of being folded in a U-shape to form a fine filter, ultrafiltration. It is widely applied to various fields such as electronics industry, medical treatment, and wastewater treatment as a filter, a reverse osmosis filter and the like.

That is, as shown in FIGS. 4 and 5 , a plurality of hollow fiber membranes 10 are supported on a hollow cylindrical support 11 to form a plurality of modules 12, and these modules 12 are connected to a connecting cylinder 13 and a connecting cylinder 13. It is continuous through the housing 14a.

[0005] When such a hollow fiber membrane filter is used for large-capacity water treatment in a nuclear power plant or the like,
It is necessary to increase the membrane area of the hollow fiber membrane filter in proportion to the amount of treated water. As described above, in order to increase the membrane area of the hollow fiber membrane filter, it is necessary to increase the number of modules of the hollow fiber membrane filter or to increase the capacity of one module.

However, in the former case, arranging a large number of modules on a limited floor area is not preferable because the occupied area increases. On the other hand, in order to increase the capacity of one module without increasing the occupied area, it is conceivable to increase the length of the module.

Therefore, as shown in FIG. 7 , a number of hollow fiber membranes 1 having substantially the same length are arranged along the support 2 and both ends thereof are fixed to the support 2 by molding with a casting resin such as an epoxy resin. The seal portions 3a and 3b are formed at both ends to form a hollow fiber membrane filter.

Incidentally, reference numeral 4 in the drawing denotes a liquid passage. In the conventional hollow fiber membrane filter, a performance to limit the length L is usually about 1m between the seal portions, no further connection tube 13, as shown the module 12 to the length in FIG. 4 It is necessary to be configured in multiple stages through.

A connecting portion of the module 12 constructed as shown in FIG. 4 is shown as a detent mechanism for preventing rotation of the module.
Using a metal folding washer 23 as shown in 6. With such a folded washer 23, the module 12 cannot be assembled with one touch at the time of assembling, and an operation of folding the folded washer 23 using a driver or the like occurs.

Further, when the module 12 is used, the module is cut off and incinerated because it is long. However, there is a metal washer 23 at the connection between the modules 12 and it is necessary to remove it.

[0011]

However, the used module has a high radiation dose, and a large-capacity hollow fiber membrane filter device uses hundreds to thousands of modules. The work of removing the folded washer 23 has a problem that a great deal of labor and a large radiation exposure are inevitable.

The present invention has been made in order to solve the above-mentioned problems, and the connection operation is easy when a multi-stage structure is used in accordance with the amount of filtered water, and when a used module is cut and discarded, it is made of metal. It is an object of the present invention to provide a hollow fiber membrane filter device which can be incinerated and discarded as it is without using a folded washer, and can easily replace only a failed portion even if a failure occurs in the hollow fiber membrane filter.

[0013]

SUMMARY OF THE INVENTION The present invention provides a hollow support for a shaft center.
Holding body, a number of hollow fiber membranes converged along the support, and both ends of the condensed number of hollow fiber membranes and
A seal for fixing the support and surrounding the seal
A plurality of modules constituted by a housing ;
And a insertable connecting tube from both ends in the housing
A first stage O-ring surface on the outer peripheral surface of the housing;
A second-stage male screw connected to the lower part of the first stage,
It has a third-stage projection and a concave groove continuously provided at a lower portion of the two stages,
On the inner surface of the connection tube, the corresponding to the first to third stages
O-ring groove to fit O-ring at each position, female thread
And providing a projection to be fitted into the concave groove,
Characterized by comprising a detent mechanism to prevent rotation of the Le.

[0014]

[Function] If a multi-stage structure is used according to the amount of filtered water, the connection work is easy, and when the used module is cut and disposed, it can be completely incinerated without disassembly. Only can be easily replaced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the hollow fiber membrane filter device according to the present invention will be described with reference to the drawings. The hollow fiber membrane filter device of this embodiment converges a number of hollow fiber membranes 10 having substantially the same length along the hollow support 11 at the axial center as shown in FIG.
Two modules 12, both ends of which are sealed and fixed by a seal portion 14, are connected in a liquid-tight manner by a connecting cylinder 13.

The seal portion 14 of each module 12 is formed by molding the outer periphery of the ends of a large number of hollow fiber membranes converged with a casting resin such as an epoxy resin while exposing the openings thereof . It is molded and fixed together with the support 11 to a housing 14 a surrounding the seal portion 14 . At the center of the connecting cylinder 13, an annular stepped portion A
A is formed on the annular stepped portions A, A.
Of the housing 14a is seated .

In this embodiment, particularly, FIG.
As generally shown, the outer peripheral surface of the housing 14a of the seal portion 14 of the module 12 has a seal surface sealed by a first-stage O-ring 18 and a second continuous lower portion of the first stage. Step Male Thread
Thread 15 and a third-stage projection connected to the lower portion of the second stage.
A raised portion C is formed.

As shown in FIG. 3 , the projection C has a width W (0.5 to 1.0 mm) and a height H on the outer periphery of the housing 14a.
Has a projection 31 in the range of each of (0.14~0.27mm), the butt
A groove 33 is provided at a lower portion of the protrusion 31. On the other hand, in connection tube 13
Each position corresponding to the first to third steps on the surface
The O-ring groove 17 for fitting the O-ring 18 into the
The thread groove 16 of the internal thread screwed into the thread 15 and the protrusion C
The projection 32 to be fitted into the concave groove 33 is formed.

The projection 32 has a height of about 0.5 mm,
End inner diameter D ₂ of the connection tube 13 housing 14a outer peripheral protruding portion diameter D
Make it smaller than ₁ and seal the connection tube 13 and module 12
At the time of connection of 14, the protrusion 14 of the housing 14a gets over and engaged.

This engagement is achieved by connecting tube 13 and housing 14a.
The projection 32 at the end of the connection tube 13 temporarily expands and goes over the projection 31 of the housing 14a to form a concave groove of the housing 14a. It fits into the 33.

The width of the projections 31 and 32 is 0.5 to 1.0 mm and the height is 0.14 to
0.27 mm is a dimension that does not loosen the connection due to the flow pressure and vibration of the processing liquid in order to obtain a torque value that can be operated manually. The module connecting portion engaged and connected with the projections 31 and 32 does not come off unless a strong rotational force is applied from the outside. Such assembled method reverse the above operations as required in this embodiment, the module 12 can be easily attached and detached.

[0022] In the above embodiment has been described as being connected two by connecting tube 13 to the module 12, the present invention is not limited to such an embodiment, FIG. 4
It is also possible to connect three or more modules 12 in series as shown in FIG.

Also, a projection of about 0.5 mm is provided inside the connection cylinder 13.
32, the outer periphery of the housing 14a is formed to be larger than the inner diameter of the projection 32 , and the housing 14a is engaged using the elastic force of the connection tube 13.
Thus , rotation of the module 12 can be prevented .

[0024]

According to the present invention, it is possible to connect a plurality of modules easily, its processing capacity can be easily changed depending on some filtering processes handled have weight. Therefore, it is very effective when used in a field where a flat space is limited, such as a nuclear power plant.

In addition, since a metal material is not used for the rotation preventing structural material of the module connecting portion and a plastic resin is used, when a used module is cut and discarded, a disassembling operation for removing a metal folded washer as in the related art is performed. Without this, it is possible to cut and incinerate and discard with a module cutting device.

For this reason, a large capacity of several hundreds to several thousand modules is used in a large-capacity hollow fiber membrane filter device. Radiation exposure can be reduced.

Furthermore, since the connection and disassembly of the module can be easily performed with one touch, only the faulty portion can be replaced in a state where a plurality of modules are connected vertically, so that the maintenance cost can be reduced and the structure is simple. Therefore, there is an advantage that the exchange time is short.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of one embodiment of a hollow fiber membrane filter device according to the present invention.

FIG. 2 is a cross-sectional view showing a main part of a connection portion of the embodiment in FIG .
FIG.

FIG. 3 is a sectional view showing a combination of connection portions in FIG . 2;

FIG. 4 shows a hollow fiber membrane having a multi-stage structure of a conventional module .
Sectional drawing which shows a filter apparatus.

FIG. 5 is a longitudinal section showing a main part of the module in FIG . 4;
FIG.

FIG. 6 is an enlarged cross-sectional view showing a connecting portion in FIG . 5;

FIG. 7 is a longitudinal section schematically showing a conventional hollow fiber membrane module.
Area view.

[Explanation of symbols]

10: hollow fiber membrane, 11: support, 12: module, 13: connecting cylinder, 14: seal, 14a: housing, 15: screw thread, 16
... screw groove, 17 ... O-ring groove, 18 ... O-ring, 19, 20 ... concave groove, 23 ... folding washer.

Claims (1)

(57) [Claims] 1. A hollow support at an axial center and a support along the support.
Multiple number and the hollow fiber membrane focused Te Align, that this focused
Seals for fixing both ends of the hollow fiber membrane of the book and the support
And a housing surrounding the seal
A plurality of modules, comprising a insertable connecting tube from both ends in the housing, the outer periphery of the housing
O-ring surface of the first step and the lower part of the first step
And a third male thread connected to the lower part of the second gear.
A step projection and a concave groove;
O-rings at each position corresponding to the first to third stages
O-ring groove to be fitted, female screw and fit into the concave groove
Anti-rotation device for preventing rotation of the module by providing projections
The hollow fiber membrane filter device, characterized by comprising a structure.