KR100459038B1 - Membrane module for water treatment - Google Patents

Abstract

PURPOSE: To provide a membrane module for water treatment, which is able to reduce a manufacturing cost by simplifying a manufacturing process and has an improved structure, thereby improving a manufacturing efficiency. CONSTITUTION: The membrane module comprising a membrane assembly (40) including a support body (10) to form a flow path (12), a pair of spacers (20), each of which is laminated on a front side or a rear side of the support, and a pair of solid-liquid separation membranes (30), each of which is laminated on the spacer to transmit liquid and solid having a size of not more than a predetermined size, and a frame (50) that is fixed to circumference of the membrane assembly and includes an outlet (51) to discharge a fluid in the flow path to the outside is characterized in that the frame includes many protrusions (11) that are protruded from a front side and a rear side perpendicular to the front and rear sides, the flow path is a space formed among each sides of the supporting body, the protrusions and the spacers and the frame further includes upper side supporting portions on both sides of an upper end and lower side supporting portions on both side of a lower end.

Description

Membrane module for water treatment

The present invention relates to a membrane module for water treatment used in a membrane separation type biological treatment device for removing suspended solids contained in contaminated water, such as livestock wastewater, industrial wastewater and domestic sewage, and more particularly, to reduce production costs. It relates to a flat membrane module for water treatment so that the structure is improved.

Household sewage discharged from homes, livestock wastes after industrial wastes and industrial wastes, etc. are emerging as environmental problems, especially water pollution. In particular, as environmental concerns are amplified in modern times, effective treatment of wastewater is becoming an important social concern. Accordingly, various methods of wastewater treatment are being developed.

In general, such waste water is purified through a certain treatment in a sewage treatment plant and discharged into a river. In the sewage treatment plant and the like, various methods are used as described above to purify the waste water, but the representative one is the so-called advanced water treatment system combining biological and physical and chemical methods. In this advanced treatment method, microorganisms are used to decompose organic matter and to purify contaminated water by removing nitrogen compounds and phosphorus compounds in contaminated water.

The flat membrane module for water treatment is used in one of such advanced treatment methods.

1 and 2 show a conventional water treatment flat membrane module.

As shown in Figure 1 and 2, the conventional water treatment flat membrane module (1) is a support (2), a spacer (3) laminated on the front and back of the support, a solid-liquid separation membrane (laminated on the outer surface of the spacer ( It is generally composed of a flat membrane assembly 7 composed of 4) and a frame 9 fixed to an edge of the flat membrane assembly. In addition, the frame 9 is provided with a discharge port 8 connected to the discharge pump.

The flat membrane module for water treatment is installed in a water tank (aeration tank) in which contaminated water is accommodated. As described above, since the solid-liquid separation membrane 4 is stacked on the outermost side of the flat membrane module for water treatment, a solid having a predetermined size or more in the contaminated water cannot penetrate the solid-liquid separation membrane 4 and is below a predetermined size. Only solids and liquids may pass through the solid-liquid separation membrane 4 to flow into the flat membrane module for water treatment. When the liquid in the contaminated water and a solid below a certain size pass through the solid-liquid separation membrane 4 and pass through the spacer 3, the liquid 2 comes into contact with the support 2. A plurality of tubular flow paths are formed in the support 2, and a plurality of holes 2b are drilled on both sides of the support 2 so that fluid can flow into the tubular flow path 2a. It is. Accordingly, the fluid passing through the solid-liquid separation membrane 4 and the spacer 3 flows into the flow path 2a in the support 2 through the hole 2b, and the fluid is moved along the flow path 2a. It is discharged to the outside through the outlet (8). Purification of contaminated water is carried out in the manner described above.

In order to manufacture such a conventional water treatment flat membrane module, in particular, the support 2, there is a problem in economic efficiency because many processes are required. That is, in order to manufacture the conventional support body 2, first, the support body in which the flow path 2a is formed by extrusion molding must be manufactured, and again, numerous holes 2b are formed on both sides of the support body. It must be drilled one by one. The manufacturing process is complicated, and in particular, a large number of perforations (2b) have to be drilled one by one, resulting in an increase in manufacturing cost and a decrease in production efficiency.

The present invention has been made to solve the above problems, and the object of the present invention is to provide a water treatment flat membrane module whose structure is improved to not only reduce the production cost but also improve the production efficiency by simplifying the manufacturing process.

1 is a schematic exploded perspective view of a flat membrane assembly of a conventional flat membrane module for water treatment.

2 is a schematic perspective view of a conventional membrane module for water treatment.

3 is a schematic exploded perspective view of the flat membrane assembly of the flat membrane module for water treatment according to the present invention.

4 is a schematic perspective view of the flat membrane module for water treatment according to the present invention.

FIG. 5 is a schematic front view of the solid-liquid separation membrane and the spacer of the water treatment flat membrane module shown in FIG. 4.

FIG. 6 is a schematic cross-sectional view taken along line VI-VI of the flat membrane assembly shown in FIG. 4. FIG.

7 is a view for explaining the installation of the flat membrane module for water treatment shown in FIG.

8 is a view for explaining the use of the water treatment flat membrane module shown in FIG.

<Description of the symbols for the main parts of the drawings>

100 ... membrane module for water treatment 10 ... support

11 ... protrusion 12 ... space (euro)

14 ... Cap 16 ... First support element

17 ... second support element 18 ... third support element

19 ... fourth support element 20 ... a pair of spacers

30 ... one pair of solid-liquid separation membrane 40 ... flat membrane assembly

50 ... frame 51 ... outlet

54 ... reinforcement 210 ... discharge pump

300 ... aeration tank 310 ... bubble generator

320 ... upper support rod 330 ... lower support rod

W ... contaminated water 220 ... hose

The flat membrane module for water treatment according to the present invention for achieving the above object, a support for forming a flow path for the flow of fluid, a pair of spacers stacked on the front and back of the support and the outer surface of the spacer is laminated liquid And a flat membrane assembly composed of a pair of solid-liquid separation membranes for transmitting only a solid having a predetermined size or less, and a frame having an outlet formed at an upper end thereof for discharging the fluid in the flow path to the outside. In the flat membrane module for water treatment, a plurality of protrusions are formed on the front and back of the support and are projected vertically with respect to the front and back of the support, the flow path is each side and the plurality of projections of the support And a space formed between the spacer and the spacer.

According to the present invention, it is preferable that the projections have a cross shape in the overall shape of the cross section.

In addition, according to the present invention, the support has a plurality of support elements and connecting means for connecting each support element and other support elements adjacent to the support element, the connecting means is a projection of the support elements and the It is preferred to have a cap overlying the protrusions to receive the protrusions of adjacent support elements together.

In addition, according to the present invention, the spacer is preferably a nonwoven fabric.

In addition, according to the present invention, both sides of the upper end of the frame is provided with an upper support projecting upward, respectively, it is preferable that both sides of the lower end of the frame is provided with a lower support projecting downward.

In addition, according to the present invention, the support is preferably manufactured by injection molding.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a schematic exploded perspective view of the flat membrane assembly of the water treatment flat membrane module according to the present invention, Figure 4 is a schematic perspective view of the flat membrane module for water treatment according to the present invention, Figure 5 is a solid solution of the flat membrane module for water treatment shown in FIG. 6 is a schematic sectional view taken along the line VI-VI of the flat membrane assembly shown in FIG. 4, and FIG. 7 is a view for explaining the installation of the flat membrane module for water treatment shown in FIG. 8 is a view for explaining the use of the membrane module for water treatment shown in FIG.

3 to 8, the flat membrane module 100 for water treatment according to the present invention includes a flat membrane assembly 40 and a frame 50.

The flat membrane assembly 40 includes a support 10, a pair of spacers 20, and a pair of solid-liquid separation membranes 30.

The support 10 has a thin plate shape having front and back sides, and four support elements 16, 17, 18, 19 of the first to fourth support elements arranged in close contact with each other and the four support elements 16. It consists of connecting means for connecting the support elements 16, 17, 18, 19. On the other hand, on the front and back of the support 10, a plurality of projections 11 are formed to protrude perpendicularly to the front and back, respectively. The plurality of protrusions 11 are arranged to be spaced apart from each other, the overall shape of the cross section is a cross. The four support elements 16, 17, 18 and 19 are of the same shape and shape because they are produced by injection molding by the same mold. In the state where the lower end of one of the four support elements and the upper end of the other support element adjacent to the support element are in close contact with each other, the two support elements are joined to each other by a cap 14 as a connecting means. That is, the lower end of the first support element 16 is formed with a protrusion of the lower half of the symmetrical cross-shaped projection is formed, the upper end of the second support element 17, the upper portion of the symmetrical cross-shaped projection The protrusions are cut in half. When these protrusions come into contact with each other, they become a complete cross-shaped protrusion, and the corresponding cross-sectional protrusions of the half of the first support element 16 and the half of the second support element 17 are combined. The cap 14, which is made of a phosphorus cross, is press-fitted by pressing. That is, the cap 14 is covered on the protrusions so that the protrusions of the first support element 16 and the protrusions of the second support element 17 are accommodated together so that the first support element 16 and the second support element ( 17) are combined with each other. The cap 14 is covered by the pair of protrusions, respectively, so that the first support element 16 and the second support element 17 are more firmly coupled. In addition, the second support element 17 and the third support element 18 and the third support element 18 and the fourth support element 19 are also coupled to each other in the same manner.

The pair of spacers 20 are stacked on both sides of the support 10. The spacer 20 is positioned between the support 10 and the solid-liquid separation membrane 30 to be described later to separate the support 10 and the solid-liquid separation membrane 30 from each other. In this embodiment, the spacer 20 is made of a nonwoven fabric.

When the spacer 20 is stacked on the support 10, a space 12 is formed between the outer surface of the support 10, the plurality of protrusions 11, and the inner surface of the spacer, and the space 12 forms a flow path through which the fluid flows.

The pair of solid-liquid separation membranes 30 are stacked on each outer surface of the pair of spacers 20. The pair of solid-liquid separation membranes 30 allows only liquid and solids of a predetermined size or less to pass therethrough. Fine holes are formed evenly throughout. In the present embodiment, the solid-liquid separation membrane 30 is formed with a hole through which only a liquid and a solid having a size of 0.2 micrometer or less can pass therethrough.

The frame 50 is fixed to the edge of the flat membrane assembly 40. An outlet 51 is formed at an upper end of the frame 50. The discharge port 51 is for discharging the fluid in the flow path to the outside and is through the flow path. In addition, the discharge port 51 is fitted with a hose 220 which is connected to the discharge pump 210. On the other hand, both sides of the upper end of the frame 50 is provided with an upper support portion 52 protruding upwards, respectively, and a lower support portion 53 protruding downwardly is provided on both sides of the lower end of the frame 50, respectively. When the plurality of water treatment flat membrane modules 100 are arranged in a line and installed in the aeration tank 300 in which the bubble generator 310 is provided, two upper support rods 320 provided above the aeration tank 300. ) Is placed on the upper end of the frame 50 in close contact with each inner side of the upper support 52. The distance between each outer side of the two upper support rods 320 is slightly larger than the distance between the inner side of each upper support portion 52 of the flat membrane module 100 for water treatment. On the other hand, when the lower support portion 53 is installed in the aeration tank 300 in which the plurality of water treatment flat membrane modules 100 are arranged in a line and the bubble generator 310 is provided, the lower side of the aeration tank 300 Two lower support rods 330 provided in the state are in close contact with each inner side of the lower support portion 53, the water treatment flat membrane module 100 is supported on the lower support rods 330. The frame 50 is supported. The distance between each outer side of the two lower support rods 330 is slightly larger than the distance between the inner side of each of the upper and lower support portions 53 of the flat membrane module 100 for water treatment. On the other hand, the upper end of the frame 50 is formed with a reinforcing portion 54 extending in the longitudinal direction of the flat membrane module to prevent the left and right ends of the flat membrane module in contact with each other. The reinforcement 54 is formed to extend in the longitudinal direction at the longest part of the center of the upper end of the frame 50, and the length of the reinforcement is gradually reduced compared to the central part while going to both sides of the upper end of the frame 50. . In addition, a hole 55 is formed in the center of the reinforcement part 54 so that a user can easily grasp the flat membrane module 100 for water treatment.

Hereinafter, an example of using the flat membrane module 100 for water treatment according to the present embodiment will be described.

In order to manufacture the flat membrane module 100 for water treatment, first, the plurality of first support elements 16 to fourth support elements 19 are sequentially arranged adjacent to each other. These plurality of support elements are produced in a very simple batch by injection molding by the same mold. Thereafter, the projection 11 located at the lower end of the first support element 16 and the projection 11 located at the upper end of the second support element 17 adjacent to the first support element 16 are housed together. Press the cap 14 to the protrusions 11. When the cap 14 is inserted into the pair of protrusions on both sides of the support elements, the first support element 16 and the second support element 17 are mutually coupled to each other, and the second support element 17 in the same manner. And the third support element 18 and the third support element 18 and the fourth support element 19. In this way, the assembly of the support 10 can be completed very simply, and the size of the flat membrane module 100 for water treatment can be freely adjusted as necessary by adjusting the number of support elements.

When the assembly of the support 10 is completed as described above, as shown in FIG. 3, a pair of spacers 20 made of the nonwoven fabric are stacked on the front and back surfaces of the support 10, and the pair A pair of solid-liquid separation membranes 30 are laminated on each outer surface of the spacer 20 to form the flat membrane assembly 40, and then the frame 50 is fixed to the edge of the flat membrane assembly 40. .

As described above, the flat membrane module 100 for water treatment, as shown in FIG. 7, is installed in a plurality in a row. At this time, the flat membrane module 100 for water treatment is supported by being fitted to the two lower support rods 330 provided in the aeration tank (300). However, since the distance between each inner side of the lower support portion 53 of the flat membrane module 100 for water treatment is smaller than the distance between each outer side of the lower support rod 330. In order to insert the flat membrane module 100 for water treatment into the lower support rod 330, the flat membrane module 100 for water treatment must be pressed downward. When the water treatment flat membrane module 100 is pressed in such a manner that the water treatment flat membrane module 100 is fitted to the lower support rod 330, each inner side of the lower support portion 53 is an outer side of the lower support rod 330. Close to. After inserting the plurality of water treatment flat membrane module 10 into the lower support rod 330, the upper support rod 320 is placed on the top of the frame 50 of the water treatment flat membrane module 100. In this case, similarly, the distance between the respective inner sides of the upper support portion 52 of the flat membrane module 100 for water treatment is the upper support rod at a position where the upper support rod 320 is to be installed in the aeration tank 300 ( Because it is narrower than the distance between each outside of 320). Pressing the upper support rod 320 in the downward direction, should be inserted in close contact with the upper support portion 52 of the flat membrane module 100 for water treatment. Thereafter, the upper support rod 320 is fixed to the aeration tank (300). When the flat membrane module 100 for water treatment is disposed in the aeration tank 300, the flat membrane module 100 for water treatment is located vertically between the upper support rod 320 and the lower support rod 330. Even when bubbles generated in the bubble generating device 310 rise in the aeration tank 300, the flow in the vertical direction is prevented. In addition, since each inner side of the upper support portion 52 and each inner side of the lower support portion 53 are in close contact with each outer side of the upper support rod 320 and each outer side of the lower support rod 330, Warping is also prevented and is reliably supported.

On the other hand, there is a reinforcement portion 54 at the upper end of the flat membrane module 100 for water treatment, even if bubbles are generated in the aeration tank 300, the left and right ends of the flat membrane module 100 for water treatment are bent in a direction in contact with each other Is prevented.

When the arrangement is completed, when the hose 220 connected to the discharge pump 210 is connected to the outlet 51 of the flat membrane module 100 for water treatment, all installations of the flat membrane module 100 for water treatment are performed. Will be completed.

After the installation is completed like this, as shown in FIG. 8, after the contaminated water W is filled in the aeration tank 300 through the inlet pipe 400, when the bubble generator 310 is operated, the aeration tank 300 is operated. Bubbles are generated at the bottom of the) to rise to the top of the aeration tank (300). When the discharge pump 210 is operated in this process, only the fluid of 0.2 micrometer or less of the contaminated water (W) passes through the solid-liquid separation membrane 30 of the flat membrane module 100 for water treatment by the pressure. After passing through the spacer 20, the space 12 is introduced into the space 12 forming the flow path. The fluid introduced in this way moves to the upper portion of the flat membrane module 100 for water treatment along the flow path, and is eventually discharged to the outside through the outlet 51.

In this embodiment, the shape of the cross section of the protrusion 11 is described and illustrated as a cross shape as a whole, but is not necessarily limited thereto, and may be modified into various shapes such as a rectangle, a circle, and an oval.

In the present exemplary embodiment, the support elements 16, 17, 18, and 19 are described and illustrated as being made up of four, but are not necessarily limited thereto. The number of the support elements 16, 17, 18, and 19 may vary depending on the size of the flat membrane module for water treatment. Of course, it can also be made of one support element without the connecting means.

In the present embodiment, the cap 14 covered by the protrusion 11 preferably corresponds to the shape of the protrusion, but is not necessarily limited thereto and may be formed in various other shapes.

As described above, the water treatment flat membrane module according to the present invention, unlike the conventional water treatment flat membrane module in its production, is economical, can be easily assembled, and there is an advantage that the size can be freely adjusted as necessary.

Claims (6)

It consists of a support for forming a flow path for the fluid flow, a pair of spacers stacked on the front and back of the support, and a pair of solid-liquid separation membranes laminated on the outer surface of the spacer and transmitting only a liquid and a solid below a certain size. In the membrane module for water treatment comprising a flat membrane assembly; and a frame is fixed to the rim of the flat membrane assembly, the upper end is formed with a discharge port for discharging the fluid in the flow path to the outside, The front and rear surfaces of the support are arranged to be spaced apart from each other and are formed with a plurality of protrusions protruding perpendicular to the front and back of the support, the flow path is between each side of the support and a plurality of projections and the spacer Formed space, Both sides of the upper end of the frame is provided with an upper support projecting upward, respectively, the lower surface of each of the lower surface of the frame is provided with a lower support protruding downward, respectively. The method of claim 1, The projection is a flat membrane module for water treatment, characterized in that the overall shape of the cross-section cross. The method of claim 1, The support has a plurality of support elements and connecting means for connecting each support element with another support element adjacent to the support element, The connecting means is a flat membrane module for water treatment, characterized in that the cap is covered with the projections to accommodate together the projections of the support element and the support element adjacent to each support element. The method of claim 1, The spacer membrane module for water treatment, characterized in that the nonwoven fabric. delete The method of claim 1, The support is a flat membrane module for water treatment, characterized in that produced by injection molding.