JPH05137974A - Filter membrane element - Google Patents

Abstract

PURPOSE:To maintain sufficient adhesive strength between an organic filter membrane and a filter plate by inserting a felt-like spacer between the organic filter membrane and the filter plate. CONSTITUTION:A support body 11 is formed by nonwoven fabric and is coated with a membrane parts 12 on both the faces to form an organic filter membrane 13. The organic filter membranes 13 are arranged on both sides of a filter plate 14 so that the filter plate 14 may be put between the filter membranes 13. Between the organic filter membrane 13 and the filter plate 14 is interposed a felt-like spacer 15 in the same shape as that of the organic filter membrane 13. And the organic filter membrane 13 and the spacer 15, and the filter plate 14 and the spacer 15 each are bonded and fixed by an adhesive 16 at the same margin A to paste up. Therefore the adhesive permeates the spacer to give large adhesive strength.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, a membrane separation device used in a water treatment device has a plurality of filtration membrane elements. For example, in a filtration membrane element as shown in FIG. 2, an organic filtration membrane 2 such as an ultrafiltration membrane or a microfiltration membrane is bonded to the front and back of a filtration plate 1 made of vinyl chloride or the like,
The organic filtration membrane 2 was formed by coating the membrane portions 4 on both sides with a nonwoven fabric as the support 3.

[0003]

However, in the above-mentioned conventional structure, the support material 3 and the membrane portion 4 are separated even if the adhesive strength between the filter plate 1 and the membrane portion 4 can be sufficiently secured. As a result, sufficient adhesive strength could not be secured.

There is also a method of directly bonding the nonwoven fabric of the support 3 and the filter plate 1 after dissolving the membrane portion 4 with a solvent or the like, but it is possible to secure sufficient strength by causing unevenness in strength. could not.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a filtration membrane element capable of ensuring a sufficient adhesive strength between an organic filtration membrane and a filtration plate.

[0006]

In order to solve the above problems, the filtration membrane element of the present invention comprises an organic filtration membrane obtained by coating the surface of a support made of a non-woven fabric with a membrane portion.
The filter plate is arranged on the surface of the filter plate through a felt-like spacer, and the organic filter membrane and the spacer, and the filter plate and the spacer are bonded and fixed with an adhesive.

[0007]

With the above structure, a large adhesive strength can be obtained by interposing a felt-like spacer between the organic filter membrane and the filter plate. In addition, since the adhesive easily penetrates into the spacer at the margin portion and the adhesive that has soaked solidifies to provide water stopping property, the liquid to be treated does not enter from the spacer portion. Further, the spacer forms a passage for the filtrate that has permeated the organic filtration membrane.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the support 11 is formed of a non-woven fabric, and the surface of the support 11 is coated with a membrane portion 12 to form an organic filtration membrane 13 such as an ultrafiltration membrane or a microfiltration membrane. The organic filtration membrane 13 is arranged on both sides of the filtration plate 14 so as to sandwich the filtration plate 14, and the organic filtration membrane 1
A felt-like spacer 15 having the same shape as the organic filtration membrane 13 is interposed between the filter 3 and the filter plate 14. The organic filter membrane 13 can be provided only on one side surface of the filter plate 14.

The organic filter membrane 13 and the spacer 15,
The filter plate 14 and the spacer 15 are bonded and fixed with an adhesive 16 at the same size margin A. Further, an opening 18 of the filtrate flow path 17 is formed on the surface of the filter plate 14,
The side of the filter plate 14 has a suction port 19 communicating with the filtrate channel 17.
Are formed.

The operation of the above structure will be described below.
In the membrane element, since the felt-like spacer 15 is interposed between the organic filtration membrane 13 and the filter plate 14 made of vinyl chloride or the like into which the adhesive does not soak, the adhesive can easily soak into the spacer 15. It is possible to obtain very high adhesive strength.

Then, the membrane element is immersed in the liquid to be treated, and the negative pressure applied from the suction port 19 is applied to the organic filtration membrane 13.
The liquid to be treated is filtered through. The filtrate that has permeated the organic filtration membrane 13 collects in the opening 18 through the spacer 15 and is sent from the suction port 19 to the next system through the filtrate channel 17. At this time, the adhesive 16 is applied to the spacer 15 in the margin portion.
The liquid soaks easily, and the adhesive that has soaked solidifies to provide waterproofness, so that the liquid to be treated does not enter from the spacer portion.

[0012]

As described above, according to the present invention, by interposing a felt-like spacer between the organic filtration membrane and the filter plate, the adhesive easily penetrates into the spacer to obtain a large adhesive strength. As a result, the adhesive that has penetrated into the spacer at the paste margin portion solidifies to provide water stopping properties, so that it is possible to prevent the liquid to be treated from entering from the spacer portion.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a membrane element according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a conventional membrane element.

[Explanation of symbols]

 11 Support 12 Membrane 13 Organic Filtration Membrane 14 Filter Plate 15 Spacer 16 Adhesive

Claims (1)

[Claims] 1. An organic filtration membrane obtained by coating a surface of a support made of non-woven fabric with a membrane portion is arranged on the surface of a filter plate via a felt-like spacer, and the organic filtration membrane, the spacer, and the filter plate are provided. A filtration membrane element characterized in that a spacer and an adhesive are adhered and fixed.