JPH11216341A - Planar membrane module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a planar membrane module capable of increasing filtration capacity by a simple structure. SOLUTION: A plurality of pieces of planar membrane elements 4 of providing a filtration membrane 2 to a membrane substrate 1 wherein two sheets of flat plates 11 having respectively a plurality of throughholes 12 and a partition 10 disposed in an array between the flat plates 11 are integrated, are laminated at specific intervals. Besides, a part of a periphery of each planar membrane element 4 is held with a substrate 5 having a water collecting channel to be integrated, and a filtrate passage in a space surrounded by the partition 10 and the flat plate 11 is so constituted as to be communicated with the water collecting channel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat membrane module, and more particularly, to a simple structure used for a filtration device for water and sewage water or a device for producing soft drinks, and has an increased filtration capacity. The present invention relates to a flat-plate membrane module capable of achieving the following.

[0002]

2. Description of the Related Art A flat membrane module is often used for applications requiring a large filtration capacity, such as a water and tap water filtration device and a soft drink production device, and has conventionally been used on the surface of a flat membrane support. A plate-like membrane element to which a filtration membrane such as an ultrafiltration membrane or a microfiltration membrane is adhered is held at a predetermined interval by a plurality of supports.

As the above-mentioned flat membrane module, there is one described in Japanese Patent Application Laid-Open No. 4-281828.

The flat membrane module described in the above publication has a plurality of flat membrane elements arranged and fixed along a frame on which a guide groove is formed with a predetermined gap. is there.

[0005]

In the flat membrane module described in the above-mentioned publication, since the flat membrane elements must be arranged and fixed one by one along the guide groove of the frame, the installation work is required. However, there is a problem that the structure becomes complicated because the function of collecting the filtrate must be provided for each flat membrane element.

[0006]

In order to solve the above-mentioned problems, according to the present invention, there is provided a flat-plate type membrane module comprising two flat plates each having a plurality of through holes, and a partition wall provided between the flat plates. A flat plate type in which a filtration membrane is provided on a membrane support obtained by integrating the above, a stock solution supplied to the surface of the filtration membrane is filtered, and the filtrate is obtained in a filtrate flow path in a space surrounded by the partition walls and the flat plate. A plurality of membrane elements are stacked at a predetermined interval, and a part of the periphery of each flat membrane element is held and integrated by a support having a water collecting channel,
In addition, the filtrate flow path and the water collection path are communicated with each other, so that the work of fixing the flat membrane elements one by one can be omitted.

According to a second aspect of the present invention, in the flat membrane module according to the first aspect, the flat membrane element has at least one of a filtrate collecting portion and a filtrate collecting through hole communicating with the filtrate flow path. The filtrate collecting portion or the filtrate collecting through-hole is characterized by being connected to a collecting channel, thereby providing a function of collecting the filtrate for each flat membrane element. There can be no structure.

According to a third aspect of the present invention, there is provided the flat-type membrane module according to the first or second aspect, wherein the support is made of a synthetic resin. Can be collectively fixed to the support, and the operation can be easily performed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on its embodiments.

FIG. 1 is a perspective view of a flat membrane module according to an embodiment of the present invention, and FIG. 2 is a perspective view of a flat membrane element used in the flat membrane module.

A feature of the flat membrane module according to the embodiment of the present invention shown in FIG. 1 is that a plurality of the flat membrane elements shown in FIG. A part is held by the support 5 and integrated.

That is, the flat plate type membrane element is a membrane support 1 in which two flat plates 11 each having a plurality of through holes 12 and a partition wall 10 arranged in parallel between the flat plates 11 are integrated.
Is provided with a filtration membrane 2, and its periphery is held by a frame 4. Then, the undiluted solution supplied to the surface of the filtration membrane 2 is filtered, and the filtrate is obtained in the filtrate flow path 3 in a space surrounded by the partition walls 10 and the flat plate 11.

The membrane support 1 is preferably made of a synthetic resin such as polypropylene, polyethylene, or polycarbonate. Each of the membrane supports 1 is a lightweight and inexpensive material that can be continuously manufactured by extrusion molding. Therefore, the filtration membrane 2 can be easily attached to the surface by an adhesive such as an epoxy resin or a urethane resin, heat sealing, or ultrasonic waves.

[0014] In the flat type membrane element,
Between the membrane support 1 and the filtration membrane 2, a porous plate or corrugated porous plate of synthetic resin or a spacer 6 made of a woven or non-woven fabric made of synthetic resin fibers may be interposed.
The problem that the filtration membrane 2 adheres to the membrane support 1 and the flow of the filtrate is hindered does not occur.

The flat membrane element has a filtrate collecting part 30 communicating with the filtrate channel 3 and a filtrate collecting through-hole 3.
1 is provided. It should be noted that the filtrate water collecting through-hole 3
1 may be provided at a plurality of locations according to the filtration capacity.

A plurality of the above-mentioned flat membrane elements are laminated at predetermined intervals, and a part of the periphery thereof is
Are integrated by being held by the support 5 provided with
The filtrate collecting part 30 and the water collecting passage 50 communicate with each other through the filtrate collecting through-hole 31 to form a flat membrane module as shown in FIG.

That is, when a synthetic resin such as vinyl chloride, polypropylene, polyethylene, polycarbonate, epoxy, urethane, or the like is used as the support 5, the material is similar to the membrane support 1. As in the case of bonding to the membrane support 1, a part of the periphery of the plurality of flat membrane elements can be easily bonded to the support 5 and integrated by an adhesive, heat sealing, or ultrasonic waves.

In addition, a plurality of flat membrane elements are laminated in advance at predetermined intervals, and each of the through holes 3 for collecting filtrate is formed.
One columnar body is inserted into 1 and a resin that cures over time such as an epoxy resin or a polyurethane resin or a thermoplastic resin is poured into this portion and cured to form a support 5, and then the columnar body is formed. If the body is removed, the filtrate collecting part 30
And the filtrate collecting water through-hole 31 can be easily formed, and a part of the periphery of the plurality of flat membrane elements can be easily adhered to the support 5 for integration. be able to.

Incidentally, the number of flat membrane elements to be adhered to the support 5 can be appropriately determined according to the required filtration capacity.

The flat-plate type membrane module thus obtained is immersed in a stock solution storage tank, and when the water collecting passage 50 is set to a negative pressure, the filtrate flow path 3, the filtrate collecting part 30, and the filtrate collecting opening are formed. 31. A filtrate can be obtained through the water collecting channel 50.

In the above embodiment, both the filtrate collecting section 30 and the filtrate collecting through-hole 31 are provided.
These may be at least one. That is, when only the filtrate water collecting part 30 is provided, the filtrate water collecting part 30 may be directly connected to the water collecting passage 50 of the support 5. When only the filtrate water collecting through-hole 31 is provided, the filtrate water collecting part 30 may be used. What is necessary is just to comprise so that the channel | path 3 may communicate with the water collecting channel 50 of the support body 5 directly.

[0022]

As described above, according to the first aspect of the present invention, it is not necessary to fix the flat membrane elements to the support one by one, so that the assembly of the flat membrane module can be facilitated. In the invention described in the item (2), since it is not necessary to provide a function of collecting the filtrate for each plate-type membrane element, the configuration of the plate-type membrane module can be simplified. Since it is easy to fix the membrane elements to the support at one time, it is possible to contribute to a reduction in manufacturing cost of the flat membrane module.

[Brief description of the drawings]

FIG. 1 is a perspective view of a flat membrane module according to an embodiment of the present invention.

FIG. 2 is a perspective view of a flat membrane element used in the flat membrane module.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Membrane support 2 Filtration membrane 3 Filtrate flow path 4 Frame 5 Support 6 Spacer 30 Filtrate water collecting part 31 Filtrate water collecting through-hole 50 Water collecting channel

Claims (3)

[Claims] 1. A filtration membrane is provided on a membrane support in which two flat plates each having a plurality of through-holes and a partition arranged in parallel between the flat plates are provided, and the filtration membrane is supplied to the surface of the filtration membrane. The undiluted solution is filtered, and a plurality of flat membrane elements are arranged at predetermined intervals so that the filtrate is obtained in a filtrate flow path in a space surrounded by the partition walls and the flat plate. A flat membrane module, wherein a part of the periphery is held and integrated by a support having a water collecting channel, and the filtrate flow path and the water collecting channel communicate with each other. 2. The flat membrane module according to claim 1, wherein the flat membrane element has at least one of a filtrate collecting part and a filtrate collecting through-hole communicating with the filtrate flow path,
A flat membrane module, wherein the filtrate collecting part or the filtrate collecting through-hole communicates with a collecting channel. 3. The flat membrane module according to claim 1, wherein the support is made of a synthetic resin.