JPH06226063A - Membrane module - Google Patents

Abstract

PURPOSE:To prevent immersion of liquid to be treated from a side face of a spacer in a membrane module holding a felt-like spacer between a filtration membrane and a membrane supporting body. CONSTITUTION:The filtration membrane 11 is made larger than tha spacer 10, is arranged as covering the spacer 10 and is fixed with an adhesive to the membrane supporting body 9 at the peripheral part 13 of the filtration membrane 11. In this way, as the whole spacer is covered with the filtration membrane, immersion of liquid to be treated from the side face is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a membrane module of a membrane separation unit used in a water treatment device or the like.

[0002]

2. Description of the Related Art Conventionally, this type of membrane separation unit has been shown in FIG.
As shown in the overall configuration in FIG. 1, a plurality of membrane modules 2 are arranged in parallel at appropriate intervals in a casing 1 provided inside the processing tank.

An aeration device 7 for supplying oxygen or air to the liquid to be treated in the tank is provided below the membrane module 2, and the aeration device 7 takes in oxygen or air from the outside of the tank as indicated by an arrow B. By supplying the bubble flow indicated by the arrow C to the gap between the membrane modules 2, a gas-liquid mixed stirring flow indicated by the arrows C and D is generated in the tank, and the cake layer adhering to the surface of the filtration membrane is separated. Washing.

In the membrane module 2, as shown in FIG. 3, the organic filtration membrane 4 is formed on the surface of the rectangular flat membrane support 3.
Are arranged. Further, a felt-like spacer 5 having the same size as that of the membrane 4 is interposed between the organic filtration membrane 4 and the membrane support 3 to prevent the filtration membrane 4 and the membrane support 3 from adhering to each other. A membrane permeate flow channel is formed inside.

At this time, an adhesive is applied to both sides of the peripheral edge of the felt-like spacer 5 corresponding to the peripheral edge of the film 4 so that the spacer 5 is adhesively fixed to the film support 3 and the spacer 5 holds the adhesive. Then, the filter membrane 4 is sufficiently melted, so that the filter membrane 4 is welded on the spacer 5 at the peripheral portion.

Then, a permeate suction pipe communicating inside the filtration membrane 4 is provided, and a negative pressure is applied to the membrane module 2 through the permeation liquid suction pipe so that the liquid to be treated in the tank is passed through the filtration membrane 4. Suction filtered.

[0007]

However, in the above-mentioned conventional membrane module 2, the filtration membrane 4 and the felt spacer 5 are usually formed in the same size as shown in the figure, and the adhesive is made of felt. If the spacer 5 does not evenly penetrate in the thickness direction of the spacer 5, there is a problem that the liquid to be treated containing sludge or the like enters from the side surface 6 of the spacer 5.

The present invention solves the above problems, and an object of the present invention is to provide a membrane module which can prevent the infiltration of a liquid to be treated and can preferably perform solid-liquid separation.

[0009]

In order to solve the above problems, in the membrane module of the present invention, a filtration membrane is arranged on the surface of the membrane support, and a felt-like spacer is provided between the filtration membrane and the membrane support. In the membrane module in which the filter is interposed, the filtration membrane is formed larger than the spacer, the spacer is disposed so as to cover the spacer, and the periphery of the filtration membrane is adhesively fixed to the membrane support.

[0010]

With the above construction, the filtration membrane is formed larger than the spacer, and the filtration membrane is arranged so as to cover the spacer, and the peripheral portion of the filtration membrane is directly adhered and fixed to the membrane support without using the spacer. Because it is covered with a film,
It is possible to prevent the liquid to be treated from entering from the side surface of the spacer.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A membrane module of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an essential part of a membrane module according to an embodiment of the present invention. In the membrane module 8, 9 is a rectangular flat plate-shaped membrane support, and a felt-like spacer 10 forming a membrane permeate flow channel is adhered and fixed at the peripheral edge 12 on the surface of the membrane support 9 and the spacer 10 Filtration membrane 11
Are arranged. The filtration membrane 11 is formed to be larger than the spacer 10, and is bonded and fixed to the membrane support 9 at the peripheral portion 13 of the membrane 11 without the spacer 10.

With the above structure, the entire spacer 10 is covered with the filtration membrane 11 and does not come into direct contact with the liquid to be treated.
The liquid to be treated is prevented from entering from the side surface of the spacer 10, and solid-liquid separation can be suitably performed by the membrane module.

In this embodiment, the filtration membrane 11 and the spacer
Adhesives were applied to both of 10 to adhere and fix them to the membrane support 9. However, if sufficient adhesive strength can be obtained by applying the adhesive only to the peripheral portion 13 of the membrane 11, apply the adhesive to the spacers 10. It may not be applied.

Further, in order to reduce the resistance of the membrane-permeated liquid flow path, the membrane support 9 may be textured.

[0015]

As described above, according to the present invention, by covering the entire spacer with the filtration membrane formed larger than the spacer, a sufficient amount of the adhesive agent that closes the side surface of the spacer as in the conventional case is used. Without penetrating into
The infiltration of the liquid to be treated from the side surface of the spacer can be avoided, and the membrane can be suitably separated by the membrane module.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts for explaining a membrane module according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a configuration of a membrane separation unit in which the membrane module of the present invention and the conventional example are used.

FIG. 3 is a cross-sectional view of essential parts for explaining a conventional membrane module.

[Explanation of symbols]

 8 Membrane Module 9 Membrane Support 10 Felt Spacer 11 Filtration Membrane 13 Periphery

Claims (1)

[Claims] 1. In a membrane module in which a filtration membrane is arranged on the surface of a membrane support and a felt-like spacer is interposed between the filtration membrane and the membrane support, the filtration membrane is formed larger than the spacer. The membrane module is characterized in that the membrane module is disposed so as to cover the membrane and is adhesively fixed to the membrane support at the peripheral portion of the filtration membrane.