JP2897799B2 - Filtration 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 for a membrane separation device used in a water treatment device or the like.

[0002]

2. Description of the Related Art Conventionally, a membrane separation apparatus used in a water treatment apparatus has a plurality of filtration membrane modules. For example, in a filtration membrane module 1 as shown in FIG. 3, a rectangular plate-like membrane support 2 made of vinyl chloride or the like is used.
On the front and back, an organic filtration membrane 3 such as an ultrafiltration membrane or a microfiltration membrane was adhered and fixed at the peripheral portion, and a permeated liquid suction pipe 4 was provided inside the filtration membrane 3. A plurality of filtration membrane modules 1 are arranged in parallel at appropriate intervals to constitute a membrane separation device, immersed in the liquid to be treated in the tank, and applied with a negative pressure through the permeate suction pipe 4. The liquid to be treated was filtered by the organic filtration membrane 3.

At this time, between the organic filtration membrane 3 and the membrane support 2, as shown in FIGS. 4 (a) and 4 (b) which are AA 'sectional view and BB' sectional view of FIG. In addition, a spacer 5 is interposed therebetween to prevent the filtration membrane 3 from adhering to the membrane support 2 to form a membrane permeate flow path.

[0004]

However, since the above-described conventional filtration membrane module 1 has a configuration in which a net or felt is inserted as the spacer 5, the manufacturing process of the filtration membrane module 1 is complicated, and the cost is reduced. There was a problem of getting high.

An object of the present invention is to solve the above problems and to provide a filtration membrane module which can be manufactured easily and at low cost.

[0006]

Means for Solving the Problems The present invention to solve the above problems, it covers the surface of the membrane support in the filtration membrane, the
In the filtration membrane module which is parallel to dip arranged at appropriate intervals in the processing solution, to form a width less than 1mm recess to serve as a channel for membrane permeate the surface of the membrane support multiple, communicating with the recess is provided with a permeate suction pipe leading to the outside by sucking the film permeate was. In addition,
Here, a plurality of recesses are communicated with each other. Ma
In any of the above configurations, the width of the recess and the recess
The distance between the portion and the concave portion is set to 5 mm or less.

[0007]

As described above, the width of the recess is set to 1 mm or less.
As a result, the negative pressure during suction causes the filtration membrane to support the membrane between the recesses.
Even if it is in close contact with the surface of the carrier, the concave part will cause
Can be secured, and the membrane permeated liquid can be collected and taken out .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a filtration membrane module according to one embodiment of the present invention will be described with reference to FIG. The overall configuration of the filtration membrane module 6 is the same as the conventional filtration membrane module shown in FIG. 3, and FIG. 1A shows a cross section corresponding to the AA ′ cross section in FIG. b) shows a cross section corresponding to the BB 'cross section. The filtration membrane module 6 has a rectangular plate-like membrane support 7 formed of vinyl chloride or the like, and an organic filtration membrane 8 which is an ultrafiltration membrane or a microfiltration membrane is disposed so as to cover both surfaces thereof. ing. A plurality of recesses 9 are formed on both sides of the membrane support 7 so as to communicate with each other. The recess 9 can be formed by a method such as etching.
As shown in FIGS. 2 (a) and 2 (b), they may be parallel or oblique to the vertical and horizontal sides of the rectangular membrane support 7 and communicate with each other by intersecting the concave portions 9 or the like. I just need. The size of the recess 9 can be, for example, 1 mm or less in depth, 1 mm or less in width, and 5 mm or less between recesses.

In the vicinity of one side of the membrane support 7, recesses 9 on both sides of the membrane support 7 penetrate the membrane support 7 in the thickness direction.
A communication passage 11 communicating with the communication path is formed. This communication passage 11
At the substantially central position in the longitudinal direction, extends outside the membrane support 7 in a direction parallel to the surface of the membrane support 7 and communicates with the suction tube 10.

The operation of the above configuration will be described below.
The filtration membrane module 6 is immersed in the liquid to be treated, a negative pressure is applied to the filtration membrane module 6 through the permeated liquid suction pipe 10 by a suction pump or the like, and the liquid to be treated is sucked. As a result, the liquid to be treated is solid-liquid separated by the organic filtration membrane 8 and the organic filtration membrane 8
Through the recess 9 of the membrane support 7
It flows into 11 and the permeate suction pipe 10 and is taken out of this pipe 10 as treated water. At this time, even if the organic filtration membrane 8 adheres to the membrane support 7 due to the suction negative pressure, the concave portion 9 secures a flow path for the permeated liquid on the surface of the membrane support 7.

[0011]

According to the present invention as described above, according to the present invention, provided the following recess width 1mm by etching or the like to the membrane support Rutoi
Simple structure allows membrane permeation even when suction pressure is applied
The liquid flow path can be secured, and the
Since it is not necessary to provide the filter, the production of the filtration membrane module is facilitated and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a filtration membrane module according to one embodiment of the present invention.

FIG. 2 is a plan view showing an arrangement of concave portions formed in a membrane support in the filtration membrane module of FIG.

FIG. 3 is a perspective view showing the overall configuration of a conventional filtration membrane module.

FIG. 4 is a cross-sectional view of a conventional filtration membrane module.

[Explanation of symbols]

 6 Filtration membrane module 7 Membrane support 8 Organic filtration membrane 9 Recess 10 Permeate suction tube

(56) References JP-A-1-266816 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B01D 63/08 B01D 63/00 510

Claims (3)

(57) [Claims] 1. A method comprising: covering a surface of a membrane support with a filtration membrane ;
In the filtration membrane module which is parallel to dip arranged at appropriate intervals in the liquid to be treated, to form a width less than 1mm recess to serve as a channel for membrane permeate the surface of the membrane support multiple, in the recess filtration membrane module, characterized in that a permeate suction pipe for guiding the communication with membrane permeate to the outside by suction. 2. The filtration membrane module according to claim 1, wherein the plurality of recesses communicate with each other . 3. The width of the recess and the interval between the recesses are 5
3. The filtration membrane module according to claim 1, wherein the size is not more than mm. 4.