JP3311236B2 - Filtration membrane module - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a filtration membrane module provided with a tubular filtration membrane.

[0002]

2. Description of the Related Art For example, in an external pressure type filtration membrane module 1 as shown in FIG. 4, a plurality of ceramic tubular filtration membranes 2 are supported at both ends by a casing 3 so as to be spaced from each other. And are arranged in parallel.

[0003] One end 2a of the tubular filtration membrane 2 is disposed so as to be fitted into a recess 4a formed in a plate 4 constituting one side of the casing 3, and is closed. The portion 2 b is inserted into a through hole 6 a formed in the plate 6 constituting the filtrate collection chamber 5 on the other side of the casing 3, and opens inside the filtrate collection chamber 5.

A suction port 8 that can communicate with suction means (not shown) such as a pump is provided in a plate 7 constituting the filtrate collection chamber 5.
Are formed. Opposing surfaces 4b, 6 of the plate bodies 4, 6
b (at least around the tubular filtration membrane 2)
In order to hold the tubular filtration membrane 2 on the plates 4 and 6 and to seal between the tubular filtration membrane 2 and the plates 4 and 6, the tubular filtration membrane 2 is in contact with the plates 4 and 6. , Resin layer 9.1
0 is provided.

In such a configuration, in a state where the filtration membrane module 1 is immersed in the liquid to be treated, suction pressure is applied to the inside of the tubular filtration membrane 2 through the suction port 8 and the filtrate collection chamber 5 by the suction means. As a result, the liquid to be treated is filtered by the tubular filtration membrane 2, and the clear filtrate 11 permeating through the membrane surface of the tubular filtration membrane 2 and flowing into the inside is passed through the filtrate collection chamber 5 and the suction port 8. It has been taken out.

At an appropriate time, as shown in FIG. 5, the cleaning fluid 12 is fed in a direction opposite to the direction of the filtration operation, whereby the tubular filtration membrane 2 is backwashed and clogged. Etc. are prevented.

[0007]

However, in the conventional filtration membrane module 1 as described above, when the tubular filtration membrane 2 is subjected to back pressure washing, fluid pressure is applied in the longitudinal direction of the tubular filtration membrane 2, The fluid pressure acts as a bending force for bending the resin layer 10 around the tubular filtration membrane 2, and a crack K may be generated in the resin layer 10.

[0008] To prevent this, the present applicant firstly
Japanese Patent Application Laid-Open No. 5-269356 proposes a plate having a resin layer provided on the surface of the plate on the side of the filtrate collection chamber.
No. 269358, as shown in FIG.
Proposed that the resin layer 10 was continuously provided on one surface of the above and the through hole 6a. With these configurations, it is possible to prevent the fluid from flowing through the gap between the tubular filtration membrane and the through-hole, reduce the bending force acting on the resin layer around the tubular filtration membrane, and prevent cracks from occurring. However, cracks were sometimes formed when high-pressure back-pressure washing was performed.

An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a membrane module capable of preventing a resin layer from being cracked due to back pressure washing of a tubular filtration membrane.

[0010]

According to a first aspect of the present invention, there is provided a filtration membrane module, wherein an end of a tubular filtration membrane has a flow passage through which a filtrate or a liquid to be filtered flows. A resin layer that penetrates the plate constituting the liquid chamber, is opened inside the liquid passage chamber, holds the tubular filtration membrane on the plate, and seals between the tubular filtration membrane and the plate. In the filtration membrane module provided on the surface of the above, the resin layer is disposed on the liquid passage chamber side and provided so as to cover the end face of the tubular filtration membrane.

According to a second aspect of the present invention, there is provided a filtration membrane module comprising:
A resin layer continuous with the resin layer disposed on the liquid passage chamber side is provided.

According to the first aspect of the present invention, even when a fluid is fed at a high pressure from the liquid passage chamber side into the tubular filtration membrane, the resin layer remains on the tubular filtration membrane side of the plate body. The fluid pressure applied to the end face of the tubular filtration membrane in the longitudinal direction is also distributed to the resin layer in the surrounding area, and the load applied to the interface between the tubular filtration membrane and the resin layer. Is lower than before, and the occurrence of cracks is prevented.

According to the second aspect of the present invention, since the resin layer is provided continuously with the surface of the plate on the side of the liquid passage chamber and the through hole, the fluid pressure applied in the longitudinal direction of the tubular filtration membrane is increased. Is also received by the resin layer in the through-hole, and the load applied to the interface between the tubular filtration membrane and the resin layer is further reduced.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, an external pressure type filtration membrane module 1 has substantially the same configuration as the above-described conventional one, and a plurality of ceramic tubular filtration membranes 2 are formed by casings 3 at both ends. By supporting, they are arranged in parallel at an interval from each other.

One end 2a of the tubular filtration membrane 2 is closed by being fitted into a recess 4a formed in a plate 4 forming one side of the casing 3, and the other end of the tubular filtration membrane 2 is closed. The portion 2b is inserted through a through hole 6a formed in the plate 6 constituting the filtrate collection chamber 5 on the other side of the casing 3, and is opened near the surface of the plate 6 on the filtrate collection chamber 5 side. I have.

The plate 7 constituting the filtrate collection chamber 5 has a suction port 8 which can communicate with suction means (not shown) such as a pump.
Are formed. Each of the plate members 4 and 6 holds the tubular filtration membrane 2 on the plate members 4 and 6, respectively.
And resin layers 9 and 10 for sealing between the first and second plates 4 and 6.

Specifically, the resin layer 9 is formed on the inner surface 4 of the plate 4.
b is provided in contact with the tubular filtration membrane 2 and the plate body 4. The resin layer 10 includes front and back surfaces 6b and 6c (at least the periphery of the tubular filtration membrane 2) of the plate body 6 and the through holes 6a.
And in contact with the tubular filtration membrane 2 and the plate body 6 continuously,
Further, it is provided so as to cover the end face 2 c of the tubular filtration membrane 2.

According to such a configuration, even when the cleaning fluid 12 is fed at a high pressure from the filtrate collection chamber 5 side to the inside of the tubular filtration membrane 2 in order to wash the tubular filtration membrane 2 under the reverse pressure. The fluid pressure applied to the end face 2c of the tubular filtration membrane 2 in the longitudinal direction is dispersed in the end face 2c and the resin layer 10 around the end face 2c.
The load applied to the interface with zero is greatly reduced, and the occurrence of cracks is prevented. Moreover, the resin layer 10 is formed on the front and back surfaces 6 of the plate body 6.
b, 6c and the through-hole 6a, the fluid pressure applied in the longitudinal direction of the tubular filtration membrane 2 causes the resin layer 10 located in the through-hole 6a and on the surface 6b side of the plate body 6 to pass through. , The tubular filtration membrane 2 and the resin layer 1
The load applied to the interface with zero further decreases. In such a filtration membrane module 1, no cracks were generated even after 100,000 times of back pressure washing at ² kgf / cm ² for 10 seconds.

Also, as shown in FIG. 3, an inner pressure type filtration membrane module 21, that is, liquid passage chambers 23 and 24 are formed at both ends of a casing 22, and one end 25 a of a tubular filtration membrane 25 is connected to a liquid passage chamber 25. It opens inside the chamber 23 and the other end 25
In the case where b is open inside the liquid passage chamber 24,
If the resin layers 28 and 29 as described above are provided on the plates 26 and 27 constituting the liquid passage chambers 23 and 24, respectively, even when the liquid to be treated flows in the direction shown by the arrow A, When flowing the cleaning fluid in the opposite direction, the resin layer 28,
29 cracks can be prevented.

[0020]

As described above, according to the present invention, the resin layer is provided so as to cover the end surface of the tubular filtration membrane opened inside the liquid passage chamber, so that the inside of the tubular filtration membrane is arranged from the liquid passage chamber side. When the fluid is pumped to the surface, the load applied to the interface between the tubular filtration membrane and the resin layer can be greatly reduced,
The generation of cracks can be prevented.

At this time, by continuously providing the resin layer also in the through hole through which the end of the tubular filtration membrane penetrates, the load applied to the interface between the tubular filtration membrane and the resin layer can be further reduced. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an overall configuration of an external pressure type membrane module according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a main configuration of the external pressure type membrane module shown in FIG.

FIG. 3 is a cross-sectional view showing the overall configuration of an internal pressure type membrane module according to another embodiment of the present invention.

FIG. 4 is a cross-sectional view showing the overall configuration of a conventional external pressure type membrane module.

FIG. 5 is an enlarged cross-sectional view showing a main configuration of the external pressure type membrane module shown in FIG.

FIG. 6 is an enlarged sectional view showing a configuration of a main part of another conventional external pressure type membrane module.

[Explanation of symbols]

 Reference Signs List 1 membrane module 2 tubular filtration membrane 2b end 2c end face 5 filtrate collection chamber 6 plate 6a through hole 6b, 6c face 10 resin layer 21 membrane module 23,24 liquid passing chamber 25 tubular filtration membrane 25a, 25b end 26,27 Plate 28,29 Resin layer

──────────────────────────────────────────────────続 き Continued on the front page (72) Ken Yoshizaki, Inventor 2-1-1, Nishijima, Nishiyodogawa-ku, Osaka-shi, Osaka Inside Kubota Shin-Yodogawa Plant (72) Inventor Mikiharu Tokushima 2-Chome, Nishijima, Nishiyodogawa-ku, Osaka-shi, Osaka No. 1, No. 6, Kubota Corporation New Yodogawa Plant (56) References JP-A-3-137922 (JP, A) JP-A-5-269358 (JP, A) JP-A 5-269357 (JP, A) Kaihei 5-269356 (JP, A) JP-A 4-70128 (JP, U) (58) Fields studied (Int. Cl. ⁷ , DB name) B01D 61/00-65/10 C02F 1/44

Claims (2)

(57) [Claims] 1. An end portion of a tubular filtration membrane penetrates a plate constituting a passage chamber through which a filtrate or a liquid to be filtered flows and opens inside the passage chamber to open the tubular filtration membrane. In a filtration membrane module in which a resin layer that holds the plate and seals between the tubular filtration membrane and the plate is provided on the surface of the plate, the resin layer is disposed on the liquid passage chamber side, and a tube is provided. A filtration membrane module provided so as to cover an end face of the filtration membrane. 2. The filter according to claim 1, wherein a resin layer continuous with the resin layer disposed on the liquid passage chamber side is provided in a through hole of the plate body through which the end of the tubular filtration membrane penetrates. Membrane module.