JP2982842B2 - Membrane module - Google Patents

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, a membrane separation unit of this type is shown in FIG.
As shown in FIG. 1, a plurality of membrane modules 2 are arranged in parallel at appropriate intervals in a casing 1 provided inside a processing tank.

[0003] An aerator 7 for supplying oxygen or air to the liquid to be treated in the tank is provided below the membrane module 2, and oxygen or air is taken in from the outside of the tank as shown by an arrow B by the aerator 7. By supplying the bubble flow indicated by arrow C to the gap between the membrane modules 2, a gas-liquid mixed stirring flow indicated by arrows C and D is generated in the tank, and the cake layer adhering to the surface of the filtration membrane is separated. Has been washed.

[0004] In the membrane module 2, as shown in FIG. 3, an organic filtration membrane 4 is provided on the surface of a rectangular plate-shaped membrane support 3.
Has been arranged. In addition, a felt-like spacer 5 having the same size as 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 sticking to each other. A membrane permeate flow path 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 portion of the film 4 to fix the spacer 5 to the film support 3 and hold the adhesive on the spacer 5. Then, by sufficiently dissolving the filtration membrane 4, the filtration membrane 4 is welded to the spacer 5 at the periphery.

[0006] A permeated liquid suction pipe is provided inside the filtration membrane 4, and a negative pressure is applied to the membrane module 2 through the permeated liquid suction pipe so that the liquid to be treated in the tank passes through the filtration membrane 4. Suction filtration.

[0007]

However, in the conventional membrane module 2 described above, the filter membrane 4 and the felt-like spacer 5 are usually formed in the same size as shown in the drawing, and the adhesive is made of felt-like. If the liquid does not permeate uniformly in the thickness direction of the spacer 5, there is a problem that the liquid to be treated including sludge enters from the side surface 6 of the spacer 5.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a membrane module capable of preventing intrusion of a liquid to be treated and capable of suitably performing solid-liquid separation.

[0009]

In order to solve the above problems, a membrane module according to the present invention is provided with a casing provided inside a processing tank.
In parallel at appropriate intervals and below.
-Liquid mixing caused by air supplied from aerated aerators
A membrane module that cleans the membrane surface with agitated flow, supporting the membrane
Around the felt spacer interposed between the body and the filtration membrane
Adhere to the membrane support at the part and cover the periphery of the spacer
At the periphery where the filter membrane to be formed is larger than the spacer
The adhesive was fixed to the membrane support .

[0010]

According to the above construction, the filtration membrane is formed larger than the spacer, is disposed so as to cover the spacer, and is directly adhered and fixed to the membrane support without the spacer at the peripheral portion of the filtration membrane. Because it is covered with a membrane
Intrusion of the liquid to be treated from the side surface of the spacer can be prevented.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a membrane module according to the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a main part of a membrane module according to one embodiment of the present invention. In the membrane module 8, reference numeral 9 denotes a rectangular plate-like membrane support, and a felt-like spacer 10 forming a membrane permeate flow path is adhered and fixed to the surface of the membrane support 9 at a peripheral portion 12. Filter membrane 11
Is arranged. The filtration membrane 11 is formed larger than the spacer 10, and is fixed to the membrane support 9 at the periphery 13 of the membrane 11 without the spacer 10 interposed therebetween.

With the above configuration, the spacer 10 is entirely covered with the filtration membrane 11 and does not directly contact the liquid to be treated.
Intrusion of the liquid to be treated from the side surface of the spacer 10 is prevented, and solid-liquid separation can be suitably performed by the membrane module.

In this embodiment, a filter membrane 11 and a spacer
An adhesive is applied to both of the substrates 10 and fixed to the membrane support 9. However, when an adhesive is applied only to the peripheral portion 13 of the membrane 11 and sufficient adhesive strength can be obtained, the adhesive is applied to the spacer 10. It is not necessary to apply.

The membrane support 9 may be textured to reduce the resistance of the membrane permeate flow path.

[0015]

As described above, according to the present invention, by covering the entire spacer with a filtration membrane formed larger than the spacer, a sufficient amount of adhesive enough to close the side surface of the spacer as in the prior art is provided. Without infiltrating
Intrusion of the liquid to be treated from the side surface of the spacer can be avoided, and membrane separation can be suitably performed by the membrane module.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a main part of a membrane module according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of a membrane separation unit using the present invention and a conventional membrane module.

FIG. 3 is a cross-sectional view illustrating a main part of a conventional membrane module.

[Explanation of symbols]

 8 Membrane module 9 Membrane support 10 Felt-like spacer 11 Filtration membrane 13 Perimeter

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B01D 63/08 B01D 63/00 510

Claims (1)

(57) [Claims] (1) a casing provided inside a processing tank;
Arranged in parallel at appropriate intervals, from the aeration device located below
The membrane surface is stirred by a gas-liquid mixed stirring flow generated by the supplied air.
A membrane module for washing, comprising a membrane support and a filtration membrane.
Felt spacers interposed between the membrane support at the periphery
Glue and filter the filtration membrane placed over the periphery of the spacer.
Contact the membrane support at the periphery formed larger than the pacer
A membrane module that is fixedly attached.