KR100766569B1 - Membrane module for treating water - Google Patents

Abstract

A membrane module for water treatment is provided to improve the cleaning efficiency, by constituting a support for supporting membranes of a flexible fiber sheet, and to reduce a size of a plant for water treatment by lowering the width. A membrane module comprises a flexible support(10) and membranes(20) deposited on both surfaces of the flexible support. The flexible support is prepared by coating a fiber sheet(12) with resin. The fiber sheet is selected from a woven fabric and a non-woven fabric. Flow grooves(15) are formed on the flexible support. The flexible support and edges of the membranes are fixed by adhesive agent or frames.

Description

Membrane Modules for Water Treatment {MEMBRANE MODULE FOR TREATING WATER}

1 is an exploded perspective view showing a flat membrane module for water treatment according to the prior art.

FIG. 2 is a combined perspective view of FIG. 1.

3 is an exploded perspective view of the membrane module according to the first aspect of the present invention.

4 is a perspective view of the combination of FIG.

5 is a cross-sectional view taken along the line A-A of FIG.

6 is an exploded perspective view of a membrane module according to a second aspect of the present invention.

<Description of Symbols for Major Parts of Drawings>

10 support 12 fiber sheet

15 euro groove 20 membrane

30: adhesive 40: frame

50: outlet

The present invention relates to a membrane module for water treatment, and more particularly, by configuring a support for supporting a membrane with a flexible fiber sheet, the membrane module is easy to be washed and the washing efficiency is excellent, and the thickness is reduced, thereby treating the membrane. It relates to a membrane module for water treatment that can reduce the site of the plant.

Large-scale water treatment plants are used to purify sewage, wastewater, and leachate generated at homes, industrial sites, and agricultural and livestock sites. Currently, water treatment is mainly dominated by advanced treatment methods that combine both biological and physical and chemical methods. In general, a water treatment plant includes a membrane filtration device for solid-liquid separation, and the membrane filtration device is provided with a plurality of membrane modules arranged for substantial solid-liquid separation. As the membrane module, a module made of hollow fiber membrane or flat membrane is used.

1 and 2 show a flat membrane module for water treatment according to the prior art, Figure 1 is a schematic exploded perspective view, Figure 2 is a combined perspective view.

1 and 2, the flat membrane module 1 for water treatment according to the prior art includes a plate-shaped support plate 2, a spacer 3 laminated on both sides of the support plate 2, and the spacer 3. It has a membrane 4 laminated on the outer side of the. And the frame (9) for fixing the components are coupled to the rim, the upper frame (9) has a discharge port (8) connected to the pump (pump). At this time, the spacer 3 has a pore p, and the support plate 2 has a flow path 2a formed in the vertical direction.

The flat membrane module 1 is immersed in a state in which a plurality of squarely arranged in the tank in which the contaminated water is accommodated to separate the solid liquid. Specifically, the suction force of the pump prevents the solids larger than a certain size contained in the contaminated water from passing through the membrane 4, and the solids and the liquids smaller than the predetermined size pass through the membrane 4 and then through the spacer 3. It is finally discharged to the outside through the discharge port 8 along the flow path 2a of the support plate 2.

The flat membrane module 1 shown in FIGS. 1 and 2 has been pointed out a problem such as a fabrication process for drilling the flow path 2a and the pores p formed in the support plate 2. In order to improve this, Korean Patent No. 0459038 proposes a flat membrane module configured to protrude and form a plurality of protrusions on the support plate 2 so that the space provided by the protrusions is a flow path 2a.

However, the conventional flat membrane module 1 including the prior patent document has the following problems.

The flat membrane module 1 needs to be washed (backwashed) at a certain point in time, but the conventional flat membrane module 1 is made of a hard plastic material of the support plate 2 and the frame 9, so that the washing is difficult and the efficiency is low. In addition, in the manufacturing process, a process for forming a passage for fluid flow, that is, a flow path 2a and a pore p, in the support plate 2 and the spacer 3 must be accompanied. It is heavy and thick. That is, the components except for the membrane 4 are made of hard plastic material, and at the same time, the supporting plate 2, the spacer 3 and the frame 9 must be included as components. In addition, there is a problem that the site of the water treatment plant takes a lot by taking up a large volume by the thickness.

The present invention is to solve the conventional problems as described above, easy to clean the membrane module, excellent washing efficiency, easy to manufacture, the thickness is reduced for the water treatment membrane that can reduce the site of the water treatment plant The purpose is to provide a module.

In order to achieve the above object, the present invention provides a membrane module for water treatment comprising a flexible support coated with a resin on a fiber sheet, and a membrane laminated on both sides of the flexible support.

In this case, the flexible support may be selected from a woven or nonwoven fabric, preferably a woven fabric is used. In addition, it is preferable to have a structure in which the flexible support is bent or provided with a channel groove provided in the weaving process of the fabric.

Hereinafter, with reference to the accompanying drawings will be described the present invention in more detail. The accompanying drawings show preferred embodiments of the present invention, which are provided to explain the present invention in more detail, and thus the technical scope of the present invention is not limited thereto.

3 is an exploded perspective view of the membrane module according to the first aspect of the present invention, FIG. 4 is a combined perspective view of the FIG. 3, and FIG. 5 is a cross-sectional view taken along the line A-A of FIG. 4.

3 to 5, the membrane module according to the present invention includes a flexible support 10 and at least two membranes 20. The membrane 20 is used as usual, which is laminated on both sides of the support (10).

The flexible support 10 is formed by coating a resin (resin) on the fiber sheet 12. The fiber sheet 12 may be selected from fabrics made by weaving fiber strands or yarns, and non-woven fabrics made by opening fibers onto a web using a carding machine. It is a fabric. The fibers constituting the fibrous sheet 12 include synthetic fibers and natural fibers, for example polyester, polyamide, polyacryl, polyurethane, polyvinyl chloride, polyvinylidene chloride, polyethylene, polypropylene, rayon , Synthetic fibers such as nylon, or one or two or more selected from natural fibers such as cotton, wool, linen, silk, and the like. More preferably, the fibrous sheet 12 may be a nylon woven fabric having a small strain or a woven fabric mixed with a polyurethane / polyester yarn.

In the membrane module according to the present invention, the fiber sheet 12 as described above is used as the support 10, to secure the pores through which the fluid can pass through the fiber sheet 12 itself, so that conventional drilling operations are excluded. Easy to manufacture and saves cost In addition, the fiber sheet 12 has a flexible (flexible), it is easy to wash in the back washing (back washing) process of the membrane module and high cleaning efficiency by air bubbles. In addition, it is light and can reduce thickness.

In constructing the support 10, in the case of only the fiber sheet 12, the flexibility is so strong that the bearing capacity is lowered. Accordingly, the fiber sheet 12 is coated with a resin for securing a bearing force. By the resin coating, the fiber sheet 12 maintains the shape and rigidity which can be used as the support 10. Resin coatings include spray coating, impregnation coating, and the like.

The resin is preferably used in a diluted state in a solvent, and the diluting solvent includes an organic solvent and water. At this time, it is preferable to use water as a solvent in consideration of working conditions such as coating operation, smell, and environmental problems, and the resin is preferably a hydrophilic resin (or a composition containing an additive in the hydrophilic resin). As the resin used for the coating, for example, one or more mixtures selected from the group consisting of acrylic resins, epoxy resins, polyvinyl alcohols, polyethylene oxides, and the like may be used, and polymers thereof may be used. As a commercialized product, EM-101-50 (Korea, Kukdo Chemical Co., Ltd.) may be usefully used as an epoxy resin.

The flexible support 10 and the membrane 20 as described above in the stacked state their edges are fixed to each other. The edges of the support 10 and the membrane 20 may be fixed by the adhesive 30 or the frame 40, preferably four directions (up, down, left and right) are fixed by the adhesive 30, and then four directions. At least an upper portion of the upper, lower, left, and right sides may further be coupled to the frame 40. In this case, the frame 40 coupled to the upper portion has a structure in which an outlet 50 connected to the pump is formed.

In addition, it is preferable that a flow path groove 15 is formed in the flexible support 10 in the vertical direction so that the fluid passing through the membrane 20 can easily flow upward. The flow path groove 15 may be bent in the process of curing after the resin coating, or may be provided in the manufacturing process of the fiber sheet 12. More specifically, the flow path groove 15 is formed by the concave-convex structure of the forming mold in the process of pressing and curing the fiber sheet 12 coated with a resin into a forming mold having a concave-convex structure on the inner surface. Can be. At this time, the inner surface of the molding die is a product, that is, the release agent is preferably coated so that the separation of the support 10 is easy. In addition, the flow path groove 15 is preferably formed during the weaving of the fiber sheet 12, that is, the weaving of the fabric.

6 is an exploded perspective view of a membrane module according to a second aspect of the present invention.

Referring to FIG. 6, the flexible support 10 is preferably formed with a flow path groove 15 in its vertical direction. In this case, the flexible support 10 is bent in a waveform to form the flow path groove 15. May be formed to be round (R). And the edge of the support 10 and the membrane 20 may be fixed by the adhesive 30, and then have a structure in which the frame 40 is coupled in four directions (up, down, left, right).

In addition, as illustrated in FIG. 6, at least one or more holes 18 may be punctured in at least the lower edge of the four directions (up, down, left, and right) edges of the flexible support 10. 6 illustrates the two holes 18 perforated on both sides of the lower rim. Holes 28 may also be drilled in the membrane 20 at positions corresponding to the holes 18. As such, a plurality of membrane modules may be connected by using a device such as a rivet through the perforated hole.

Membrane module according to the present invention described above is installed in the immersion type filtration device of the water treatment plant, a plurality of squarely arranged in the form of flat membrane as usual. In addition, the membrane module according to the present invention can be installed in the form of a cartridge as it has flexibility.

According to the present invention, since the support 10 supporting the membrane 20 has flexibility, it is easy to clean and has a large amount of air bubbles (air vortex generation amount), thereby having an excellent washing efficiency. In addition, in contrast to the conventional structure consisting of the support plate 2 and the spacer 3, the support 10 is composed of a fiber sheet 12 secured rigidity by resin coating, and is light and porous per se in the fiber sheet 12 itself. There is no need to have a separate spacer (3). As a result, the thickness is reduced, and the thickness decreases the area (volume) occupied by the membrane module in the water treatment plant, thereby reducing the site of the water treatment plant.

Claims (7)

Membrane module for water treatment comprising a flexible support coated with a resin on a fiber sheet, and a membrane laminated on both sides of the flexible support. The method of claim 1, Membrane module for water treatment, characterized in that the fiber sheet is a woven or non-woven fabric. The method of claim 1, The flexible support is a membrane module for water treatment, characterized in that the flow path groove is formed. The method of claim 1, Membrane module for water treatment, characterized in that the edge of the flexible support and the membrane is fixed by an adhesive or a frame. The method of claim 1, The membrane module for water treatment is a membrane module for water treatment, characterized in that the support of the flexible support and the edge of the membrane is fixed by an adhesive, the frame is coupled to the top. The method of claim 1, Membrane module for water treatment, characterized in that the resin coated on the fiber sheet is one or two or more selected from the group consisting of acrylic resin, epoxy resin and polyvinyl alcohol. The method of claim 1, The flexible support is a membrane module for water treatment, characterized in that the perforated hole in the lower edge.

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