KR100999038B1 - Membrane module - Google Patents

Abstract

According to the present invention, the outer cylinder is formed inside the hollow; A plurality of separation membranes arranged in the longitudinal direction inside the outer cylinder; A lower fixing unit having a raw water inlet through which raw water flows and an air supply hole through which air is supplied, and fixed by inserting lower ends of the plurality of separators; An upper fixing unit formed with a filtered water discharge port through which the filtered water passing through the plurality of separators is discharged to the outside, and a raw water recovery hole through which the raw water that has not passed through the plurality of separators is discharged to the outside, and inserted with upper ends of the plurality of separators fixed; An upper adhesive portion formed by applying an adhesive to open the upper ends of the separators; And a lower adhesive part formed by applying an adhesive to close the lower end of each separator, wherein the plurality of separators adjacent to the upper adhesive part form a plurality of separator groups in a slit shape parallel to the raw water collecting port, and the separator group is a raw water recovery unit. The membrane module is spaced apart from each other to form a passage in a spherical direction, and is provided at a position facing the raw water recovery port, and further provided with a membrane module further provided with an air supply nozzle for selectively injecting air to a plurality of membrane groups.

Membranes, modules, capillaries,

Description

Membrane module

The present invention relates to a membrane module that can be applied as one component of a water treatment system, and more particularly, to a membrane module for filtering raw water using a plurality of membranes.

In general, a water treatment system refers to, for example, purifying domestic sewage or rainwater of a building and recycling it into heavy water of a building. In such a water treatment system, a membrane module incorporating a plurality of separators is applied to refilter the raw water purified first in an aeration tank (not shown).

As the membrane module, an external pressure type may be used to treat raw water having high turbidity. In such an external pressure membrane module, intermittent air is blown out from the bottom so that contaminants adhered to the membrane surface fall. However, the above air blowing method is very effective at high turbidity of raw water or at concentrations of mixed liquor suspended solids (MLSS) of several thousand mg / L level, such as Membrane Bio-Reactor (MBR). Can't exert

In addition, the upper portion of the membrane module, more specifically, the contaminants such as solids, sludge, etc. are stuck in a portion adjacent to the down portion from the membrane fixed by the adhesive. Because of this, the membrane is cut and broken, and the membrane contamination is increased, and the water flow rate is drastically reduced. Moreover, the contaminants do not fall well even after cleaning, making it difficult to recover the membrane module performance. Therefore, as the operation time gradually increases, the cleaning effect gradually decreases even when aeration is performed, which ultimately causes a shortening of the life of the membrane.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a membrane module having an improved structure to facilitate the removal of contaminants to facilitate performance recovery and ultimately to improve the durability of the separator. .

Membrane module for achieving the above object, the hollow formed inside the outer cylinder; A plurality of separation membranes arranged in the longitudinal direction in the outer cylinder; A lower fixing unit having a raw water inlet through which raw water is introduced and an air supply port through which air is supplied, and fixed by inserting lower ends of the plurality of separators; A filter water discharge port through which the filtered water passed through the plurality of separators is discharged to the outside, and a raw water recovery port through which the raw water that has not passed through the plurality of separators is discharged to the outside, and an upper end of the plurality of separators is inserted and fixed. A fixed unit; An upper adhesive part formed by applying an adhesive to open the upper ends of the separation membranes; And a lower adhesive part formed by applying an adhesive to close the lower ends of the separators, wherein the plurality of separators adjacent to the upper adhesive part forms a plurality of separator groups in a slit shape parallel to the raw water recovery port, and Separation membrane group is spaced apart from each other to form a passage in the direction of the raw water recovery port, and further provided with an air supply nozzle is installed in a position facing the raw water recovery port to selectively inject air to the plurality of membrane groups.

In addition, the membrane module is fixed so that the lower end is opened by the lower adhesive portion and is disposed in the longitudinal direction between the plurality of separation membranes, the air supply means for ejecting the air supplied through the air supply port toward the plurality of separation membranes further It can be provided.

Here, the air supply means may be one selected from a capillary, a hollow fiber membrane, and a braid in which a plurality of air blowing holes are formed.

Alternatively, the air supply means may be a plurality of braids having an open top and having different lengths.

The membrane module may further include a plurality of air supply pipes fixed in such a manner that the lower end is opened by the lower end adhesive part and disposed in the longitudinal direction between the plurality of separation membranes.

According to the membrane module according to the present invention, by selectively injecting air using an air spray nozzle, the contaminants attached to the separation membrane of the upper portion that is relatively contaminant can be easily discharged toward the water recovery port. . In particular, the effect of removing the contaminants may be further improved by passing the air injected from the air spray nozzles between the passages formed between the membrane groups.

In addition, the air supply means made of a capillary, hollow fiber membrane or braid, by blowing the air through the air blowing hole between the separation membrane and the separation membrane, it is possible to more efficiently remove the contaminants attached to the separation membrane.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be water and variations.

Hereinafter, with reference to the accompanying drawings to describe the membrane module according to an embodiment of the present invention.

1 is a conceptual view showing an example of a water treatment system to which a membrane module according to an embodiment of the present invention is applied, FIG. 2 is a vertical cross-sectional view of the membrane module shown in FIG. 1, FIG. 3 is a cross-sectional view taken along line III-III of FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 2, and FIG. 5 is a view for explaining the operation of the air supply means shown in FIG.

First, as shown in FIG. 1, the water treatment system includes an aeration tank 1 for purifying introduced living sewage, a membrane module 100 for filtering raw water passing through the aeration tank 1, and a membrane module ( Membrane blower 2 for supplying air to the 100, and the treated water storage tank (3) for storing the filtered water passed through the membrane module (100). However, here, for the convenience of description, the membrane module 100 according to the embodiment of the present invention is shown as being applied as one component of the external circulation water treatment system, but the membrane module 100 of the present invention is used for water treatment. It is not limited to the system, and it can be applied to a variety of uses, including not only all kinds of water purification systems for filtering and filtering raw water introduced, but also for concentrating and separating fractions of food, bio and chemicals.

2 to 5, the membrane module according to an embodiment of the present invention, the outer cylinder 10, a plurality of separation membrane 20, the lower fixing unit 30, the upper fixing unit 40, The upper adhesive part 50 and the lower adhesive part 60 are provided.

The outer cylinder 10 has a hollow formed therein, and is provided to surround a plurality of separation membranes 20 to be described later. The outer cylinder 10 may be in various forms such as a cylindrical shape or a polygonal shape including a square.

The separation membrane 20 is inserted into a plurality of long in the longitudinal direction inside the outer cylinder (10). The separator 20 may be a plurality of fine holes are formed therein to remove the contaminants contained in the raw water to filter the raw water.

The lower fixing unit 30 has a shape in which one end is opened, and lower ends of the plurality of separation membranes 20 are inserted and fixed. The lower fixing unit 30 has a raw water inlet 31 through which raw water is introduced, and an air supply port 32 through which air is supplied. Here, the raw water inlet 31 is formed on the side of the lower fixing unit 30, as shown in Figure 2, the air supply port 32 is preferably formed in the lower portion of the lower fixing unit 30, The formation position is not limited. In addition, the lower fixing unit 30 is screwed with the first lower fixing portion 33 surrounding the side of the separation membrane 20, the first lower fixing portion 33 and surrounds the lower end of the separation membrane 20 It may be composed of a second sub-government 34, but this is an illustrative example, the first sub-government 33 and the second sub-government 34 may be integrally formed. In addition, the first lower fixing part 33 and the second lower fixing part 34 may be combined by various coupling methods in addition to screwing. Therefore, the shape or coupling method of the lower fixing unit 30 should not be interpreted as limiting the scope of the present invention.

The upper fixing unit 40 also has an open shape at one end, and the upper ends of the plurality of separation membranes 20 are inserted and fixed. The upper fixing unit 40 is formed with a filtered water discharge port 41 through which the filtered water passed through the separation membrane 20 is discharged to the outside, and a raw water recovery port 42 through which raw water that has not passed through the separation membrane 20 is discharged to the outside. It is. Here, the filtered water outlet 41 is formed on the upper portion of the upper fixing unit 40, the raw water recovery port 42 is preferably formed on the side of the upper fixing unit 40. In addition, the upper fixing unit 40, the first upper fixing portion 43 surrounding the side of the separation membrane 20, the first upper fixing portion 43 is screwed with the surrounding the upper end of the separation membrane 20 It may be composed of the second upper fixing section 44, but this is to be interpreted that the shape or coupling manner does not limit the scope of the present invention as an example.

The top adhesive part 50 is coated with an adhesive so that the top of the plurality of separators 20 is fixed. At this time, the top of the separation membrane 20 is coated with an adhesive so as to be open so that the filtered water flowing through the inside of the separation membrane toward the filtered water outlet 41.

The lower adhesive part 60 is coated with an adhesive so that the lower ends of the plurality of separators 20 are fixed. At this time, the lower end of the separation membrane 20 is coated with an adhesive to be closed (공기 口) in order to prevent air from entering.

In the embodiment of the present invention as described above, as shown in Figure 4, the plurality of separators 20 adjacent to the top adhesive portion 50 is a plurality of separators in a slit (Slit) side by side with the raw water recovery port 42 Groups 20a, 20b, 20c, 20d, and 20e are formed. The separation membrane groups 20a, 20b, 20c, 20d, and 20e are spaced apart from each other to form a passage S in the direction of the raw water recovery port 42. However, the plurality of separation membranes 20 adjacent to the lower adhesive portion 60 may form a separation membrane group in a slit shape, but may be arranged radially as shown in FIG. 3.

And the air supply nozzle 70 for selectively injecting air to the plurality of membrane groups (20a, 20b, 20c, 20d, 20e) is installed at a position facing the raw water recovery port 42. By spraying air toward the membrane groups 20a, 20b, 20c, 20d, and 20e using the air spray nozzles 70, contaminants may fall from the upper separation membrane to which relatively contaminants such as solids and sludge are attached. So that it can be easily discharged toward the water recovery port (42). In particular, as the air injected from the air spray nozzle 70 passes between the passages S formed between the separation membrane groups 20a, 20b, 20c, 20d and 20e, the effect of removing contaminants may be further improved. Here, in order to allow the compressed air injected from the air spray nozzle 70 to be uniformly delivered to each of the separation membrane groups 20a, 20b, 20c, 20d, and 20e having a slit shape, the front of the air spray nozzle 70 is illustrated. However, air distributors can be installed.

The air injection nozzle 70 may always eject air, but may have a high cost of air injection, and thus may be backwashed during operation, or may be selectively blown out at rest to scale at the top of the separation membrane 20. It is preferable to discharge the sludge and particles to the raw water recovery port 42. In some cases, the cleaning effect may be enhanced by allowing water or a cleaning agent to be injected through the air injection nozzle 70.

The membrane module 100 may further include a plurality of air supply pipes 90 fixed to open the lower end by the lower adhesive part 60 and disposed in the longitudinal direction between the plurality of separation membranes 20. The air supply pipe 90 is to be discharged toward the raw water recovery port 42 to drop the contaminants attached to the membrane surface.

In addition, the membrane module 100 according to an embodiment of the present invention, as shown in Figures 2, 3 and 5 are disposed in the longitudinal direction between the plurality of membranes 20 through the air supply port (32) Air supply means (80: 80a, 80b, 80c) for ejecting the supplied air toward the plurality of separation membrane 20 may be further provided.

The air supply means 80 may be a capillary (80a), a braid (Braid; 80b) or a hollow fiber membrane formed with a plurality of air blowing holes (81). The capillary 80a may be a hollow fiber membrane in the form of a capillary. The capillary 80a, the braid 80b, and the hollow fiber membrane are formed so that their lower ends are opened by the lower adhesive part 60 so that the air supplied through the air supply port 32 can be introduced therein. It is fixed. The air supply means (80; 80a, 80b) made of a capillary, braid or hollow fiber membrane in which a plurality of fine air ejection holes 81 are formed in this way, ejects air between the separation membrane 20 and the separation membrane 20. By supplying air through the hole 81, contaminants attached to the separator 20 can be removed more efficiently. Here, regarding the manufacturing method and shape of the capillary 80a or the braid 80b in which the air blowing holes 81 are formed, the prior art filed by the applicant of the present application (Patent No. 2006-00445570, Patent Since it is known by Korean Patent Publication No. 2007-0010666, detailed description thereof will be omitted here.

6 is a view showing another embodiment of the air supply means 80.

As shown, the air supply means 80 uses a plurality of braids (80c) having an upper end and different lengths. The braid 80c is fixed to the lower end by the lower adhesive part 60 so that the air supplied through the air supply port 32 is introduced therein. As the air is blown out through the upper ends of the braids 80c opened at different positions as described above, the air injection may be evenly performed at all positions of the separator 200. In FIG. 6, the length of the braid 80c is shown to be sequentially lengthened or shortened. However, this is merely illustrative, and there is no constant correlation between the length and the arrangement of the braid 80c. In this case, since the manufacturing method and shape of the braid 80c having only the upper end is already known, a detailed description thereof will be omitted.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

1 is a conceptual diagram illustrating an example of a water treatment system to which a membrane module according to an embodiment of the present invention is applied;

2 is a vertical cross-sectional view of the membrane module shown in FIG.

3 is a cross-sectional view taken along line III-III of FIG. 2;

4 is a cross-sectional view taken along the line IV-IV of FIG. 2;

5 is a view for explaining the operation of the air supply means shown in FIG.

6 is a view showing another embodiment of the air supply means shown in FIG.

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

10.External 20.Separation membrane

20a, 20b, 20c, 20d, 20e ... membrane group

30 ... Lower fixing unit 31 ... Raw water inlet

32 Air supply port 40 Upper fixing unit

41 Filtration outlet 42 ...

50 ... top adhesive 60 ... bottom adhesive

70 air supply nozzle 80 air supply means

90 Air supply line 100 Membrane module

S ... passage

Claims (5)

An outer cylinder 10 in which a hollow is formed; A plurality of separation membranes 20 arranged in the longitudinal direction inside the outer cylinder 10; A raw water inlet 31 through which raw water is introduced, an air supply port 32 through which air is supplied, and a lower fixing unit 30 to which lower ends of the plurality of separators 20 are inserted and fixed; A filtered water outlet 41 through which the filtered water passed through the plurality of separation membranes 20 is discharged to the outside, and a raw water recovery port 42 through which raw water not passed through the plurality of separation membranes 20 is discharged to the outside, An upper fixing unit 40 to which upper ends of the plurality of separators 20 are inserted and fixed; An upper adhesive part 50 formed by applying an adhesive to open the upper ends of the separation membranes 20; And a lower adhesive part 60 formed by applying an adhesive so that the lower ends of the separators 20 are closed. The plurality of separation membranes 20 adjacent to the upper adhesive part 50 form a plurality of separation membrane groups 20a, 20b, 20c, 20d, and 20e in a slit shape in parallel with the raw water recovery port 42. Separation membrane group (20a, 20b, 20c, 20d, 20e) are spaced apart from each other to form a passage (S) in the direction of the raw water recovery port 42, Membrane module further comprises an air supply nozzle (70) installed in a position facing the raw water recovery port (42) for selectively injecting air to the plurality of separation membrane groups (20a, 20b, 20c, 20d, 20e). The method of claim 1, A lower end is fixed by the lower adhesive part 60 and is disposed in the longitudinal direction between the plurality of separators 20 to direct air supplied through the air supply holes 32 toward the plurality of separators 20. Membrane module, characterized in that it further comprises air supply means (80: 80a, 80b, 80c) for ejecting. The method of claim 2, The air supply means (80) is a membrane module, characterized in that the selected one of the capillary (Capillary) hollow fiber membrane (80a) and the braid (Braid; 80b) formed with a plurality of air ejection holes (81). The method according to claim 2 or 3, Membrane module, characterized in that it further comprises a plurality of air supply pipe (90) is fixed so that the lower end is opened by the lower adhesive portion 60 is disposed in the longitudinal direction between the plurality of separation membrane (20). The method of claim 2, The air supply means (80), the membrane module, characterized in that a plurality of braid (Braid; 80c) having an open upper end and having a different length.

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