JPH10235163A - Membrane module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To absorb the tensile stress acting on a ceramic membrane even when expansion and contraction difference is generated between a guide plate and the ceramic membrane by a change in the circumferential temp. SOLUTION: This membrane module is constituted so that a header 3 supporting the end parts of ceramic membranes 1 and the other end parts of the guide plates 10, 10 opposed to the side surface thereof are bonded by an elastic adhesive 11 and the other end parts of the guide plates 10, 10 and the header 3 are made freely displaceable each other along the longitudinal direction of the ceramic membranes 1 by the elastic deformation of the elastic adhesive 11. By this constitution, the guide plates 10 and the ceramic membranes 1 are mutually freely expanded and contracted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an external pressure type membrane module provided immersed in a liquid to be treated.

[0002]

2. Description of the Related Art In the treatment of night soil, domestic wastewater, industrial wastewater, seawater desalination, and the like, an external pressure type membrane module provided by immersion in a liquid to be treated, as shown in FIGS. There are a plurality of tubular ceramic films 1 supported by headers 2 and 3 and arranged in parallel at intervals.

The header 2 has a suction chamber 5 formed by a face plate 4 and a suction port 6 for communicating the suction chamber 5 with the outside. One end of the hole is formed with a hole 7
And is opened to the inside of the suction chamber 5, and is fixed to the face plate 4 by the adhesive 8. The other end of the ceramic film 1
It is abutted against the inner bottom surface of the header 3 having a U-shaped cross section, and is fixed by an adhesive 9.

A pair of plastic guide plates 10, 10 facing each other across the two headers 2, 3 are arranged outside the arranged ceramic films 1 for the purpose of protecting and rectifying the ceramic films 1. ing. Guide plate 10,
One end of 10 is fixed to the header 2 with an adhesive or the like,
The other ends of the guide plates 10, 10 are fixed to an outer frame 11 provided in the longitudinal direction of the ceramic film 1 at an appropriate distance from the header 3.

[0005] When filtration is performed by such a membrane module, while the membrane module is immersed in a liquid to be treated such as a mixture of sludge and sludge, the liquid to be treated is caused to flow and pass between the ceramic membranes 1. By applying a suction pressure to the inside of the ceramic membrane 1 through the suction port 6 (or by the natural head of the liquid to be treated), the liquid to be treated is filtered in the ceramic membrane 1 and the clear water permeating through the ceramic membrane 1 is sucked. It is taken out through the chamber 5 and the suction port 6.

At this time, depending on the liquid to be treated, the temperature may rise to, for example, about 60 ° C. during the treatment. Occurs, but the guide plate 10,
The outer frame 11 to which the ceramic film 1 is fixed and the header 3 to which the ceramic film 1 is fixed are slidable with respect to each other.
And the guide plate 10 will freely expand and contract with each other,
Tensile stress is hardly generated in the ceramic film 1 and breakage is hardly generated.

[0007]

However, in the above-mentioned conventional membrane module, sludge or the like enters the gap between the header 3 and the outer frame 11 and is closed, so that the header 3 and the outer frame 11 are closed.
May not slide with each other.

The present invention solves the above problem, and provides a membrane module that can absorb the tensile stress acting on the ceramic film even when a difference in expansion and contraction occurs between the guide plate and the ceramic film due to a change in ambient temperature. The purpose is to do so.

[0009]

In order to solve the above-mentioned problems, a membrane module according to the present invention comprises a pair of tubular ceramic membranes which are supported at both ends by a pair of ceramic membranes which are supported in parallel at a distance from each other. An external pressure type membrane module in which a header is provided, and a guide plate for protecting each ceramic membrane and guiding the flow of the liquid to be treated is provided between the two headers and opposed to each other outside the plurality of ceramic membranes. In, one end of the guide plate is fixed to one header,
The other end of the guide plate is adhered to the other header with an elastic adhesive, and the other end of the guide plate and the other header are moved along the longitudinal direction of the ceramic film by elastic deformation of the elastic adhesive. Are configured to be mutually displaceable.

Preferably, the other header has a concave portion on the inner surface and has a U-shaped cross section, one end of each ceramic film is disposed in the concave portion, and the elastic adhesive filled in the concave portion is provided. Supported by the agent.

More preferably, a predetermined gap is provided between the end face of each ceramic film and the bottom face in the recess of the other header. According to the above configuration, the other end of the guide plate and the other header supporting one end of the ceramic film can be displaced from each other along the longitudinal direction of the ceramic film due to the elastic deformation of the elastic adhesive. Even if there is a difference in the coefficient of thermal expansion between the plate and the ceramic film, the guide plate and the ceramic film can freely expand and contract with each other, preventing the ceramic film from being subjected to a large tensile stress that causes its destruction. Is done.

Since the gap between the other end of the guide plate and the other header is closed by an elastic adhesive, the guide plate and the other header are integrated, and the tubular film is sufficiently supported at both ends. Therefore, sufficient strength can be obtained even when the water flow passes in a direction orthogonal to the length direction.

When one end of each ceramic film is supported by an elastic adhesive in the recess of the other header, a load is applied to the ceramic film due to the difference in expansion and contraction between the guide plate and the ceramic film due to the elastic deformation of the elastic adhesive. It can absorb tensile stress and bending stress caused by water flow. This effect is greater when a predetermined gap is provided between the end surface of each ceramic film and the bottom surface in the recess of the other header.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the membrane module according to one embodiment of the present invention has substantially the same configuration as the conventional one described with reference to FIGS. The same reference numerals are given and the detailed description is omitted.

In this membrane module, a plurality of tubular ceramic membranes 1 are provided with a header 2,
Guide plates 10, 10 are supported by 3, are arranged in parallel at a distance from each other, and face each other between both headers 2, 3.

One end of each of the guide plates 10, 10 is fixed to the header 2, and the other end of each of the guide plates 10, 10 is provided outside the header 3 at an appropriate interval along the longitudinal direction of the ceramic film 1. Fixed to the outer frame 11. One end of each ceramic film 1 is provided with a hole 7 formed through the face plate 4 of the header 2.
And is opened to the inside of the suction chamber 5, and is fixed to the face plate 4 by the adhesive 8.

The difference between this membrane module and the conventional one is that the outer frame 11 and the header 3 are bonded by an elastic adhesive 12 filled between them. Further, the other end of each ceramic film 1 is arranged at a predetermined gap between the inner bottom surface 3a and the concave portion of the header 3 having a U-shaped cross section, and the elastic adhesive 13 filled in the concave portion. It is the point where they adhered.

According to the above configuration, the other end of the guide plate 10 and the header 3 supporting the other end of the ceramic film 1 are mutually moved along the longitudinal direction of the ceramic film 1 by the elastic deformation of the elastic adhesive 12. Since the guide plate 10 and the ceramic film 1 can be freely displaced, the guide plate 10 and the ceramic film 1 can freely expand and contract with each other even when there is a difference in the coefficient of thermal expansion between the guide plate 10 and the ceramic film 1. It does not work and its destruction is prevented.

Since the gap between the other end of the guide plate 10 and the header 3 is closed by the elastic adhesive 12 and the guide plate 10 and the header 3 are integrated, the tubular ceramic film 1 has both ends. Is well supported by
It has sufficient strength against water flowing in a direction perpendicular to the length direction.

The other end of each ceramic film 1 is connected to a header 3
Of the elastic adhesive 13 with a predetermined gap between the inner surface 3a and the inner bottom surface 3a.
Elastic deformation of the guide plate 10 and the ceramic film 1 can absorb the tensile stress applied to the ceramic film 1 due to the expansion and contraction and the bending stress due to the water flow.

As the elastic adhesives 12, 13, for example, a silicon-based elastic adhesive can be used. Note that each ceramic film 1 may be arranged such that the end face of the other end abuts on the inner bottom face 3 a of the header 3. Although the outer frame 11 is not always necessary, the gap between the guide plate 10 and the header 3 can be adjusted by the outer frame 11, so that it is not necessary to form the header 3 with high accuracy, and the manufacture becomes easy.

[0022]

As described above, according to the present invention, the header supporting the end portion of the ceramic film and the end portion of the guide plate facing the side surface thereof are adhered to each other by an elastic adhesive so that the longitudinal direction of the ceramic film can be improved. The ceramic film and the guide plate can freely expand and contract with each other when the ambient temperature changes, thereby preventing the occurrence of a large tensile stress that causes the ceramic film to break.

Further, when the end of the ceramic film is supported by the header, the tensile stress applied to the ceramic film and the bending stress due to the water flow can be absorbed by bonding the elastic film in the recess of the header.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an overall configuration of a membrane module according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a bonding state between a header and a guide plate in the membrane module of FIG.

FIG. 3 is an enlarged cross-sectional view showing a bonding state between a header and a ceramic film in the film module of FIG. 1;

FIG. 4 is a longitudinal sectional view showing the entire configuration of a conventional membrane module.

FIG. 5 is a sectional view of the membrane module of FIG. 4 taken along the line II-II.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ceramic film 2, 3 Header 3a Inner bottom surface 10 Guide plate 12 Elastic adhesive 13 Elastic adhesive

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Toshiya Ozaki 2-1-1, Nishijima, Nishiyodogawa-ku, Osaka-shi, Osaka Inside Kubota Shin-Yodogawa Plant

Claims (3)

[Claims] A pair of headers are provided at both ends of a plurality of tubular ceramic films to support the respective ceramic films in parallel at a distance from each other, and the respective ceramic films are provided outside the plurality of ceramic films. In an external pressure type membrane module in which a guide plate for protecting and guiding the flow of the liquid to be treated is provided between two headers and opposed to each other, one end of the guide plate is fixed to one header, and the guide plate is The other end is bonded to the other header with an elastic adhesive,
A membrane module wherein the other end of the guide plate and the other header are configured to be mutually displaceable along the longitudinal direction of the ceramic film by elastic deformation of an elastic adhesive. 2. The other header has a concave portion on its inner surface and has a U-shaped cross section. One end of each ceramic film is disposed in the concave portion, and the elastic adhesive filled in the concave portion. The membrane module according to claim 1, wherein the membrane module is supported by: 3. The membrane module according to claim 2, wherein a predetermined gap is provided between the end face of each ceramic membrane and the bottom face in the recess of the other header.