JPH05317657A - Hollow yarn membrane filter device - Google Patents

Abstract

PURPOSE:To enable the incineration and throw away of a used module after cutting and to enable easy exchange of only the defective part thereof with an easy connecting operation by boring plural small holes in the outer peripheral part of a connecting cylinder, contracting a toric ring consisting of an elastic material from the outside and freely attachably and detachably holding this ring. CONSTITUTION:The toric ring 21 is made into a shape notching a difference deltabetween the inner peripheral length D1 of a hollow groove 20 inscribed on the connecting cylinder 13 and the outer peripheral length D2 of a hollow groove 19 inscribed on a housing 14a. The end face on the inner side of the connecting cylinder 13 is so tapered that the toric ring 21 is easily assembled. On the other hand, the hollow groove 19 inscribed on the housing 14a is set at the groove size at which the toric ring 21 is housed therein by reducing the notch length deltaof the toric ring 21. Further, several pieces of the groove holes 22 are provided on the outer periphery of the hollow groove 20 of the connecting cylinder 13. The plural small holes 22 are used in the case of removal of the module 12 from the connecting cylinder 13.

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 microfilter, an ultrafilter or a reverse osmosis filter.

[0002]

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

A large number of these hollow fiber membranes are put together and sealed at both ends, or sealed at the open end side in a U-shaped folded state to form a module. It is widely used as a filter, reverse osmosis filter, etc. in various fields such as electronics industry, medical treatment, wastewater treatment, etc.

That is, as shown in FIGS. 7 and 8, a large number of hollow fiber membranes 10 are supported on a hollow tubular support 11 to form a plurality of modules 12, and these modules 12 are connected to a connecting tube 13 and It is continuous through the housing 14a.

By the way, when such a hollow fiber membrane filter is used for treating a large amount of water in a nuclear power plant, etc.,
It is necessary to increase the membrane area of the hollow fiber membrane filter in proportion to the amount of treated water. Thus, 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 increase the capacity of one module.

However, in the former case, it is not preferable to arrange a large number of modules on a limited floor area 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 possible to increase the module length.

Therefore, as shown in FIG. 10, a large number of hollow fiber membranes 1 having substantially the same length are arranged along a support 2, and both ends of the hollow fiber membrane 1 are fixed to the support 2 by molding with a casting resin such as epoxy resin. The seal portions 3a and 3b are formed on both ends to form a hollow fiber membrane filter.

Reference numeral 4 in the drawing is a liquid passage. In this conventional hollow fiber membrane filter, the length L between the seal portions is usually about 1 m as a performance limit, and in order to make the length longer than this, the module 12 is provided with the connecting tube 13 as shown in FIG. It is necessary to form a multi-stage via.

A metal folding washer 23 as shown in FIG. 9 is used as a detent mechanism for preventing the rotation of the module at the connecting portion of the module 12 constructed as shown in FIG. With such a folding washer 23, the module 12 cannot be assembled with one touch when assembling the module 12, and an operation of folding the folding washer 23 using a driver or the like occurs.

Further, when the module 12 is used, the module is long and is cut and discarded by incineration. However, there is a metal folding washer 23 at the connecting portion between the module 12 and the module 12, and it must be removed.

[0011]

However, the used module has a high radiation dose, and a large-capacity hollow fiber membrane filter device uses a large number of modules of hundreds to thousands. The work of removing the folding washer entails a great deal of labor and a great deal of radiation exposure.

The present invention has been made in order to solve the above-mentioned problems, and when a multi-stage assembly structure is used according to the amount of filtered water, connection work is easy, 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 that can be incinerated as it is without using the folding washer and can replace only the defective portion easily even if a failure occurs in the hollow fiber membrane filter.

[0013]

According to the present invention, there are provided a plurality of modules in which a large number of hollow fiber membranes are bundled and both ends thereof are sealed and fixed, and a connecting tube into which the seal portions of the modules can be inserted from both ends. A groove that is opposed to and matches the connecting portion of the module inserted into the connecting cylinder, and a difference (δ) between the groove inner peripheral length of the connecting cylinder and the module groove outer peripheral length that is an elastic body that can be incinerated in the groove. ) Is notched, and a rotation preventing mechanism for preventing the rotation of the module by inserting the annular ring is provided.

[0014]

A plurality of small holes are formed in the outer peripheral portion of the connecting cylinder which is opposed to the connecting portion of the connecting cylinder and the module, and the annular ring of the elastic body is contracted from the outside to be detachably held. To do.

Thus, when the multi-stage structure is adopted according to the amount of filtered water, the connecting work is easy, and when the used module is cut and discarded, it can be completely incinerated without disassembling, and even if a failure should occur. Only the defective part can be replaced easily.

[0016]

An embodiment of the hollow fiber membrane filter device according to the present invention will be described with reference to the drawings. In the hollow fiber membrane filter device of this embodiment, as shown in FIG. 1, a large number of hollow fiber membranes 10 having substantially the same length are bundled along a hollow support 11 and both ends thereof are fixed by sealing. Connect the two modules 12 to the connecting tube
It is configured to be liquid-tightly connected at 13.

The seal portion 14 of each module 12 is formed by molding the outer peripheries of the ends of a large number of hollow fiber membranes, which are bundled with a casting resin such as epoxy resin, with their openings exposed. It is fixed to the mold 14a by a mold together with the support 11, and a thread 15 is formed on the outer periphery thereof.

Housings 14a are provided on the inner surfaces of both ends of the connecting tube 13.
A thread groove 16 to be screwed into the screw thread 15 is engraved, and annular step portions A, A are formed in the central portion of the connecting cylinder 13 so as to face both opening sides, and the seal portion is formed in the annular step portion. Part 14 housing
The tip of 14a is seated, and a concave groove 17 is formed in the inner circumference of the connecting cylinder 13 so as to face the outer circumference of the housing 14a, and an O-ring 18 is fitted in the concave groove 17.

Further, concave grooves B, B are formed in the housing 14a and the connecting cylinder 13 at a position corresponding to the distance between the end of the housing 14a of the seal portion 14 and the step portion A of the connecting cylinder 13. As shown in FIG. 2, the groove B has a groove 19 on the outer peripheral cylindrical surface of the housing 14a, and the groove 20 on the inner peripheral surface of both ends of the connecting cylinder 13 has the same width as the groove 19 and has a groove width of 20. Is engraved.

An annular ring 21 made of an incinerable elastic body (plastic resin or the like) as shown in FIG. 3 is inserted in the concave grooves 19 and 20 facing each other.
As shown in FIG. 2, the annular ring 21 has an inner peripheral length (D ₁ ) of a groove 20 formed in the connecting cylinder 13 and a housing 14a.
The difference (δ) from the outer peripheral length (D ₂ ) of the concave groove 19 engraved in is cut out.

Further, the inner end surface of the connecting cylinder 13 is provided with a taper so that the annular ring 21 can be easily assembled. on the other hand,
The recessed groove 19 formed in the housing 14a has a groove dimension in which the notch length (δ) of the annular ring 21 is shortened so that the annular ring 21 can be accommodated.

Further, as shown in FIG. 4, the concave groove of the connecting cylinder 13
Several small holes 22 are evenly provided on the outer periphery of 20. The plurality of small holes 22 are used when the module 12 is detached from the connecting cylinder 13.

This hollow fiber membrane filter device is a module 12
The annular ring 21 is previously attached to the concave groove 19 on the outer periphery of the housing 14a of the seal portion 14 of, and the module 12 is rotated in accordance with the thread groove 16 of the connection tube 13 screwed into the thread 15 of the housing 14a. When the screwing is advanced, the annular ring 21 comes into contact with the taper portion of the end face of the connecting cylinder 13, and the notch length (δ) of the annular ring 21 is gradually reduced, and the annular ring 21 is completely contracted to form the concave groove 19. Fit in.

Further advance the screwing of the screw thread 15 and the screw groove 16,
When the ring-shaped ring 21 is made of an elastic material, the ring-shaped ring 21 spreads in the recessed groove 20 when the recessed portion 20 of the connection tube 13 is covered. When the tip of the housing 14a of the module 12 is seated on the step portion A of the connecting tube 13, the outer peripheral groove 19 of the housing 14a and the inner peripheral groove 20 of the connecting tube 13 are opposed to each other, and the annular ring 21 is located in this groove. It spreads to the maximum inner circumference of the concave groove 20 and becomes the engaged state as shown in FIG.

At this time, the O-ring 18 is tightened on the outer peripheral surface of the housing 14a to obtain sufficient liquid tightness. Further, since the annular ring 21 is engaged with the concave groove 19 of the housing 14a of the seal portion 14 and the concave groove 20 of the connecting cylinder 13, the connection may be loosened due to the flow pressure of the processing liquid, vibration, or the like. Absent.

Further, even if one of the connected modules 12 fails, a pin for shrinking the annular ring 21 from the outside is provided in the small hole 22 provided on the outer periphery of the connecting cylinder 13 shown in FIG. It can be easily classified by rotating it using a jig provided, and only this defective product can be replaced.

FIGS. 5 and 6 are partial cross-sectional views showing the essential parts of another embodiment of the present invention. 5 and 6, the same parts as those in FIG. 1 are designated by the same reference numerals, and a duplicate description will be omitted.

In this embodiment, the sealing portion 14 of the module 12 is
The outer periphery of the first stage of the housing 14a is the sealing surface of the O-ring 18, the outer periphery of the second stage is engraved with threads 15, and the protrusion C is provided on the outer periphery of the third stage.

As shown in FIG. 6, the protrusion C has a width W (0.5 to 1.0 mm) and a height H on the outer peripheral portion of the housing 14a.
Protrusions 31 are provided in each range (0.14 to 0.27 mm). Also, on the inner surface of the end of the connecting tube 13, a protrusion 32 with a height of about 0.5 mm is provided.
The inner diameter D ₂ of the end portion of the connecting tube 13 is smaller than the diameter D _{1 of the} outer peripheral projection of the housing 14a.
When the seal portion 14 is connected, the projection 31 of the housing 14a is passed over and engaged.

This engagement is due to the connecting cylinder 13 and the housing 14a.
The material of the above is made of plastic or the like, and the plastic is made of an elastic material. The projection 32 at the end of the connecting tube 13 temporarily expands, gets over the projection 31 of the housing 14a, and is recessed in the housing 14a. Climb to 33.

The protrusions 31 and 32 have a width of 0.5 to 1.0 mm and a height of 0.14 to
0.27 mm is a size that does not cause loosening of the connection in order to obtain a torque value that can be manually operated and the flow pressure and vibration of the processing liquid. In this way, the module connecting portion engaged and connected with the protrusions 31 and 32 does not come off unless a strong rotational force is applied from the outside.

In this embodiment assembled in this manner, the module 12 can be easily attached and detached by the reverse operation of the above-mentioned method, if necessary, similarly to the above-mentioned embodiment.

In the above embodiment, an example in which two modules 12 are connected by the connecting tube 13 has been described, but the present invention is not limited to such an embodiment, and FIG.
It is also possible to connect three or more modules 12 in series as shown in FIG.

In the above embodiment of the present invention, the holding means for holding the annular ring 21 is provided with a plurality of small holes 22 in the outer peripheral portion of the connecting tube 13 which is opposed to and matches the connecting portions of the connecting tube 13 and the module 12.
Is provided, and the annular ring 21 formed of an elastic body is contracted from the outside to be detachably held.

Further, instead of the annular ring 21, the connecting tube 13
Providing protrusions 31 and 32 of about 0.5 mm inside the module,
A detent mechanism is provided on the outer periphery of the housing 14a of the seal portion 14 to prevent rotation of the module 12 by making the inner diameter of the inner protrusion of the connecting tube 13 larger and engaging by utilizing the elastic force of the connecting tube. ..

[0036]

According to the present invention, it is possible to easily connect a plurality of modules, and it is possible to easily change the processing capacity according to the amount of suction of filtration processing.
Therefore, it is very effective when used in a field such as a nuclear power plant that has a limited flat space.

Further, since the metal material is not used for the rotation preventing structural material of the module connecting portion and the plastic resin is used, the disassembling work for removing the metal folding washer is conventionally performed when the used module is cut and discarded. It is possible to cut it with a module cutting device and incinerate it without it.

For this reason, a large number of modules of hundreds to thousands are used in a large-capacity hollow fiber membrane filter device. However, in the disposal of used modules, the labor is greatly reduced and the number of workers is greatly reduced. The radiation exposure can be reduced.

Further, since the modules can be easily connected and disassembled with one touch, it is possible to replace only the defective part in a state in which a plurality of modules are connected vertically, and it is possible to reduce the maintenance cost, and the structure is simple. Therefore, there is an advantage that the exchange time can be short.

[Brief description of drawings]

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

FIG. 2 is an enlarged vertical cross-sectional view showing a main part of a connection part in FIG.

FIG. 3 is a perspective view showing a rotation stopping member in FIG.

FIG. 4 is a perspective view showing a partial cross section of the connecting portion in FIG.

FIG. 5 is a sectional view showing a main part of a connecting portion according to another embodiment of the present invention.

6 is a cross-sectional view showing a combination of connecting portions in FIG.

FIG. 7 is a cross-sectional view showing a hollow fiber membrane filter device in which a conventional module has a multi-stage structure.

8 is a vertical cross-sectional view showing the main parts of the module in FIG.

9 is an enlarged cross-sectional view showing a connection portion in FIG.

FIG. 10 is a vertical sectional view schematically showing a conventional hollow fiber membrane module.

[Explanation of symbols]

10 ... Hollow fiber membrane, 11 ... Support, 12 ... Module, 13 ... Connection tube, 14 ... Seal part, 14a ... Housing, 15 ... Thread, 16
… Screw groove, 17… Recessed groove, 18… O-ring, 19,20… Recessed groove, 21
… Annular ring, 22… Small hole, 23… Folding washer.

Claims (1)

[Claims] 1. A plurality of modules in which a large number of hollow fiber membranes are bundled and both ends of which are sealed and fixed, a connecting tube into which the sealing parts of this module can be inserted from both ends, and a connecting tube which is inserted into this connecting tube. A groove corresponding to the connecting portion of the module, and an annular ring made of an elastic body that can be incinerated in the groove and having a difference (δ) between the inner peripheral length of the connecting cylinder and the outer peripheral length of the module groove. And a whirl-stop mechanism for preventing rotation of the module by inserting the annular ring.