JPH0788337A - Filter module - Google Patents

Abstract

PURPOSE:To prevent an increase in filtration resistance without narrowing a passage even if the passage of a filtrate inside the filter membrane is pressed by the filtration differential pressure by opposing the recessed part of an embossment to the projecting part on the inside. CONSTITUTION:An embossed filter membrane 1 is folded in two so that the recessed part of the embossment is opposed to the projecting part and both sides are sealed, or two membranes are put on each other and the three sides are sealed. Further, the upper opening is adhesively bonded to the through-hole 2A of a first supporting member 2-1 to hang the membrane, the supporting member 2-1 is joined to a second supporting member 2-2, and the inside of the membrane 1 is separated from the outside by the members 2-1 and 2-2. A raw liq. is supplied outside the membrane 1, and the filtrate is drawn off from the inside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtration module, and more particularly to a filtration module capable of increasing filtration capacity.

[0002]

2. Description of the Related Art In recent years, a large membrane bag type filtration module has been attracting attention as a filtration module capable of increasing the filtration capacity.

In such a membrane bag type filtration module, the opening of the bag-shaped filtration membrane is attached to the through hole of the plate-shaped support member, and the inside and outside of the bag-shaped filtration membrane are supported by this support member. The separated solution is supplied to the outside of the filtration membrane and the filtrate is obtained from the inside.

The above-mentioned membrane bag type filtration module can increase its filtration capacity, but as time passes, clogging progresses and the filtration differential pressure increases.

[0005]

In the conventional membrane bag type filtration module described above, when the filtration differential pressure increases, the flow path of the filtrate inside the bag-shaped filtration membrane is compressed and narrowed, and the filtration resistance is increased. There is a problem that the filtrate performance increases due to the increase.

In order to solve such a problem, it has been attempted to insert a spacer such as a net made of synthetic resin into the inside of the bag-shaped filter membrane, but it has not been possible to obtain a sufficient effect. Instead, the problem arises that the cost increases due to the use of spacers.

[0007]

In order to solve the above problems, the present invention folds an embossed filtration membrane in two so that the concave and convex portions of the embossing face each other inside and seal both sides. Or, the two filtration membranes are superposed so that the concave and convex portions of the embossing face each other on the inner side, and the three sides are sealed to form a bag having an opening at the upper end, and the opening is supported by a plate. It is characterized in that it is attached to a through hole of a member, and the inside and outside of the bag-shaped filter membrane are separated by the support member, the stock solution is supplied to the outside of the filter membrane, and the filtrate is taken out from the inside. It is a thing.

[0008]

[Operation] Therefore, according to the present invention, since the concave portion and the convex portion of the embossing can be opposed to each other on the inside, even if the flow path of the filtrate inside the filtration membrane is compressed by the filtration differential pressure, the flow path is narrowed. Therefore, the filtration resistance can be prevented from increasing.

[0009]

EXAMPLES Examples will be described below.

FIG. 1 is a cross-sectional view of a filtration module of the present invention, in which an embossed filtration membrane is folded in two so that concave and convex portions of the emboss are opposed to each other and both sides are sealed. Alternatively, two sheets are superposed on each other and sealed on three sides, and the opening at the upper end thereof is adhered to the through hole 2A of the first supporting member 2-1 so as to be suspended, and the supporting member 2-1 is provided with the second supporting member 2-1. It is joined to the supporting member 2-2, and the inside and outside of the filtration membrane 1 are separated by the supporting members 2-1 and 2-2.

The outside of the filtration membrane 1 is surrounded by a rectangular housing 3-1 having a stock solution supply port 6.
The inside is surrounded by a rectangular housing 3-2 having a filtrate discharge port 7, and flanges 3-1A and 3-2A are formed at the open ends of the housings 3-1 and 3-2. The second support member 2- between 3-1A and 3-2A.
The housings 3-1 and 3-2 are integrated by bolts 4-1 and nuts 4-2 with 2 and packing 5 interposed.

As shown in FIG. 2, the filtration membrane of the above-mentioned embodiment has a convex portion 1A and a concave portion 1 formed by embossing.
The filtration membrane 1 having B is bent at a folding line 1C to seal both sides, or as shown in FIG. 3, two filtration membranes 1 having a convex portion 1A and a concave portion 1B formed by embossing are superposed on each other. Obtained by sealing the three sides.

As shown in FIG. 4, the filtration membrane obtained in this way can have X-shaped convex portions opposed to the diamond-shaped concave portions on the inner side, and the convex portions only make point contact in 1D. Therefore, even if the flow path of the filtrate inside the filtration membrane is pressed by the filtration differential pressure, the flow path is not narrowed.

Although the above-mentioned filtration module is formed by adhering the opening of the filtration membrane 1 to the through hole 2A of the first supporting member 2-1, the concave and convex portions of the emboss are opposed to each other inside. As described above, a resin that hardens with time, such as an epoxy resin or a polyurethane resin, or a thermosetting resin is poured into a place where the filtration membrane 1 having the closed opening is placed upside down and cured, and then the closed opening is closed. Even if the resin is cut and opened together with the resin, the filtration membrane 1 has a through hole 2A similar to that in the above embodiment.
What is hung on the first supporting member 2-1 having the above can be manufactured at the same time.

[0015]

As described above, in the filtration module of the present invention, even if the clogging progresses and the filtration pressure difference increases, the filtration resistance does not increase and the filtration performance can be prevented from lowering.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a filtration module of the present invention.

FIG. 2 is a side view of a filtration membrane used in the filtration module of the present invention.

FIG. 3 is a side view of a filtration membrane used in the filtration module of the present invention.

FIG. 4 shows two filtration membranes used in the filtration module of the present invention.
It is the side view which piled up the sheet.

[Explanation of symbols]

 1 Filtration Membrane 2-1 First Support Member 2-2 Second Support Member 3-1 Housing 3-2 Housing 6 Undiluted Solution Supply Port 7 Filtrate Discharge Port

Claims (1)

[Claims] 1. An embossed filter membrane is folded in two so that the embossed concave portion and the convex portion face each other on the inner side to seal both sides, or the filter membrane is internally embossed concave portion and the convex portion. And two sheets are overlapped so that and are opposed to each other and sealed on three sides to form a bag having an opening at the upper end, the opening is attached to a through hole of a plate-shaped support member, and the bag is filtered by the support member. The inside and outside of the membrane are separated,
A filtration module characterized in that the stock solution is supplied to the outside of the filtration membrane and the filtrate is taken out from the inside.