KR20050106584A - Hollow fiber membrane module and method for making thereof - Google Patents

Abstract

It is an object of the present invention to provide a hollow fiber membrane module and a hollow fiber membrane module manufacturing method which is capable of localizing defects such as hollow fiber membranes and distributing weight by separating the enlarged hollow fiber membrane module into a plurality of small modules.

In the present invention, a plurality of inlets are formed along the circumferential direction at the lower end thereof, and the central collecting pipe through which the treated water is distributed, is installed in the longitudinal direction inside the central collecting pipe and extends through the bottom surface of the central collecting pipe, and at the lower end in the circumferential direction. A plurality of outlets are formed along the central air pipe to be supplied with air, the longitudinal direction is placed in the central collecting pipe is connected to the inlet and the outlet, the plurality of housings disposed along the outer peripheral surface of the central collecting pipe, provided in each housing And a hollow fiber membrane in which water treatment is performed by a pressure difference, a fixing part for fixing the lower portion of the hollow fiber membrane to the housing, and installed at the lower portion of the housing and communicating with an inner passage of the hollow fiber membrane to collect the treated water passing through the hollow fiber membrane. Collector for circulation, it is installed in the lower portion of the housing and communicate with the outlet to bubble It provides a hollow fiber membrane module comprising a plurality of small module including diffusers for ejecting the film, Ltd.

Description

Hollow fiber membrane module and method for making

[TECHNICAL FIELD OF THE INVENTION]

The present invention relates to a method for manufacturing a hollow fiber membrane module and a hollow fiber membrane module using hollow fiber, and in particular, a hollow fiber membrane module which can be applied to a large-sized module by improving the patent application No. 2003-30323 previously filed by the present inventors; It relates to a manufacturing method.

[Private Technology]

The inventors of the present invention can maximize the removal efficiency of pollutants such as scale generated during the water treatment using the hollow fiber membrane through the Korean Patent Application No. 2003-30323, which is pre- filed, and secondly, the hollow fiber membrane that is focused in one module By increasing the number, the filling density of the hollow fiber membrane module can be increased. Third, the rigidity of the hollow fiber membrane can be reinforced to prevent breakage of the hollow fiber membrane due to the movement of the entire hollow fiber membrane. The size of the module can be enlarged by preventing entanglement or collapse of each other.Fifth, the bubble discharged through the diffuser can be delivered to the hollow fiber membranes to increase the use of bubbles and maximize the removal rate of pollutants compared to the air consumption. Sixth, by improving the fixing structure of the hollow fiber membrane to reduce the generation of secondary waste and the internal diameter of the hollow fiber membrane It provided a hollow fiber membrane module and a hollow fiber membrane module manufacturing method to prevent clogging or contaminants from entering the treated water.

However, in the case of the hollow fiber membrane module, a large-capacity module is required for large-scale processing, but a large module has a problem in that manufacturing is not easy and operation and maintenance are difficult.

Therefore, in many cases where water treatment is carried out using separation membranes, in the case of a large flow rate of the object to be treated, a large number of small modules used in a smaller scale than the hollow fiber membrane module suitable for the scale are arranged, and each small module is connected by piping. In most cases it is used.

When the small modules are connected to the pipe according to the target capacity, the membrane is functioning properly, but the raw water is introduced into the treated water due to the insufficiency of the pipe connection state, thereby causing the quality of the treated water to deteriorate.

In addition, as each module uses a motorized valve and a pump suitable for the module size, the number of electric devices used from the viewpoint of the entire facility increases, and the probability of mechanical abnormality in each electric device and driving device becomes higher. Will be.

Therefore, the necessity of increasing the size of the hollow fiber membrane module has emerged, and the present inventors have developed a manufacturing method for increasing the size of the hollow fiber membrane module and the hollow fiber membrane module by improving the hollow fiber membrane module proposed in Patent Application No. 2003-30323. Tried.

In the development process, it was found that the following technical problems need to be solved in order to obtain a large-size hollow fiber membrane module that can be practically applied.

First, there is a need to enlarge the modules but distribute the whole into small numbers.

If a large module is composed of a single body, the sealing state of the free top of the hollow fiber membrane is not good after complete configuration, so even if one part of the problem occurs, the whole part must be moved for repair and repair. If you do so, it can lead to economic losses that have to be thrown away. Therefore, there is a need for a structure capable of blocking defects in advance by manufacturing the whole as a part rather than a single piece.

In addition, in the case of increasing the size of the hollow fiber membrane module (1000㎡ / module or more), it is possible to manufacture the module consisting of a single unit, but in this case, since the weight of the module reaches hundreds of kilograms, it becomes quite difficult to manufacture the module. Therefore, the module is required to be enlarged but the structure that can distribute the weight.

Second, the temporary fixing agent for temporarily fixing the hollow fiber membrane module should be able to be stably applied.

In manufacturing the module, when using the proposed temporary fixing agent, the temporary fixing agent should be applied in a thin layer of about 5mm. In the case of large modules, the temporary diameter of the temporary fixing agent should be applied to the wide floor. It becomes difficult to apply | coat uniformly.

Third, it is necessary to easily control the temperature and minimize the energy loss during curing of the temporary fixer or the complete fixer in the manufacturing process of the large module.

Temperature control is performed by using air or water at a certain temperature when curing the temporary fixing agent or curing the complete fixing agent. As the module becomes larger, it is necessary to control the entire area of the lower part of the module with a large area and a large volume. This makes it difficult to uniformly adjust the temperature and causes a lot of energy loss.

In addition, in order to reduce the recovery energy of the temporary fixing agent, it is necessary to minimize the amount of the temporary fixing agent used when fixing the hollow fiber membrane to the module.

Fourth, the operation should be easy in the operation process and easy repair in the event of single-shot phenomenon.

Since the hollow fiber membrane does not have a special support, there is a difference in material but it is difficult to say that the strength is strong. Therefore, when a large and hard foreign matter is included in the object of processing, the hollow fiber membrane may be indispensably cut by the foreign matter, and when the hollow fiber membrane is cut, contaminants not passed through the pores of the hollow fiber membrane may have internal diameters of the hollow fiber membrane. Since it is included in the treated water through can deteriorate the water quality of the entire treated water.

Therefore, when the hollow fiber membrane single yarn phenomenon occurs, the hollow fiber membrane module should be taken out of the reactor and maintained.If the large module consists of a single body, the weight of the module itself, the hollow fiber membrane pores, the inner diameter, the collector, and the aerator are included. The weight of water adds up to several hundred kilograms, which makes it difficult for the operator to operate, and it is difficult to find an abnormal hollow fiber membrane among tens of thousands of hollow fiber membranes. In addition, since the single yarn phenomenon is severely generated, the remaining tens of thousands of hollow fiber membranes that normally function are caused, resulting in economic losses.

In addition, even in the case of the diffuser included in the module, when the diffuser pores of the diffuser are blocked by sludge or other foreign matters, the entire diffuser and the diffuser pores are difficult to be cleaned and severely impossible.

Therefore, when the module is enlarged, there is a need for easy management and maintenance.

Fifth, the free top of the hollow fiber membrane should not fall when manufacturing, transporting, or repairing the module.

When the module has to be taken out and repaired due to problems such as manufacturing of the module or single yarn, the end-free hollow fiber membrane module is free from the top of the hollow fiber membrane due to its structural characteristics and freely collapses. Sit down and break the hollow fiber membranes, causing damage to the surface or single yarn phenomena. Therefore, it is necessary to fix the hollow fiber membranes so as not to fall down when the module is taken out of the reactor and transported as necessary.

Sixth, it should be possible to block backflow of pollutants through the diffuser.

Since the hollow fiber membrane module is always immersed in the treated water containing various pollutants, the diffuser is likely to be contaminated by the pollutants. Acid pores are less likely to be contaminated while air is continuously supplied from the diffuser, but if the air supply is stopped as necessary, the subject material can flow back to the acid pores to block the acid pores. If air is supplied, it will not recover naturally.

When the acid pores are blocked in this way, the hollow fiber membrane in the part where the acid pores are blocked is not affected by scrubbing, scouring, or vibration by air, and contaminants accumulate on the membrane surface. This can lead to the loss of the function, and the contamination thus started can adversely affect the less contaminated areas, resulting in shorter membrane life.

Therefore, when the air supply to the diffuser is stopped during operation, the target material flows back to the acid pores so that the acid pores need to be blocked.

Seventh, when a large module is composed of a plurality of small modules, it is necessary to control the functions of each small module individually.

The hollow fiber membrane module may be indispensably single yarn while performing the function by being immersed in the material to be treated. If this single-shot phenomenon occurs in one of the small modules, stopping the entire module for a partial repair will stop the production of the treated water during the repair and adversely affect the entire process.

Therefore, when single yarn phenomenon occurs in some of the large modules, a means for individually stopping the function of the small module corresponding to the single yarn occurrence part without stopping the whole process is required.

Accordingly, the present invention has been made in order to meet the above requirements, firstly to provide a hollow fiber membrane module and a hollow fiber membrane module manufacturing method that can be divided into a plurality of small modules while distributing the whole in large numbers while increasing the size of the equipment; Has its purpose.

Second, another object of the present invention is to provide a hollow fiber membrane module and a hollow fiber membrane module manufacturing method capable of uniformly applying a temporary fixing agent.

Third, another object of the present invention is to provide a method for manufacturing a hollow fiber membrane module and a hollow fiber membrane module that can easily control the temperature during curing of the temporary fixer or the complete fixer, reduce the amount of use thereof, and minimize energy loss. have.

Fourth, the present invention has another object to provide a hollow fiber membrane module and a hollow fiber membrane module manufacturing method that is easy to operate in the operation process of the facility and easy to repair in the event of single yarn phenomenon.

Fifth, another object of the present invention is to provide a hollow fiber membrane module and a hollow fiber membrane module manufacturing method for fixing the top of the hollow fiber membrane during the manufacture, transportation, and repair of equipment.

Sixth, another object of the present invention is to provide a hollow fiber membrane module and a hollow fiber membrane module manufacturing method capable of preventing the backflow of contaminants through the diffuser.

Seventh, another object of the present invention is to provide a hollow fiber membrane module and a hollow fiber membrane module manufacturing method capable of individually controlling the water treatment function of each small module in the configuration of a large module with a plurality of small modules.

In order to achieve the above object, the present invention, the main unit is a plurality of small-unit modules produced separately to form a large hollow fiber membrane module.

To this end, the hollow fiber membrane module of the present invention,

A housing forming an outer shape, a hollow fiber membrane provided inside the housing and undergoing water treatment due to a pressure difference, a fixing part for fixing the lower end of the hollow fiber membrane to the housing, and installed at a lower end of the housing and communicating with an inner passage of the hollow fiber membrane A plurality of small modules including a collector for collecting the treated water passing through the hollow fiber membrane, a diffuser installed at the lower portion of the housing, for discharging bubbles into the hollow fiber membrane;

A central collecting pipe through which the collectors of each of the small modules are connected and circulated with the collected water;

The diffuser of each of the small modules is connected to include a central air pipe for supplying air to each diffuser.

Wherein the central collecting pipe and the central air pipe is located in the center in a double pipe structure, each small module is preferably arranged in a circle along the outer circumferential surface of the double pipe to maximize space utilization by connecting individually.

In addition, the diffuser of the small module is installed on the inner wall of the housing and the side acid substrate for ejecting air to install a separate central acid substrate extending from the inner wall of the housing to the center, and on the front and rear surfaces of the central acid substrate It has a structure in which a blowing hole for blowing air is formed.

This structure allows air to penetrate to the center of the hollow fiber membrane in the housing to achieve even overall contaminant removal efficiency.

One or more central mount boards may be installed depending on the size of the small module.

In addition, the present invention may further include a fixing means for fixing the top of the hollow fiber membrane of the free end shape.

For example, when the small module is pulled out of the facility, the upper end of the hollow fiber membrane, which is a free end, may swell due to the empty space between the hollow fiber membranes. The top can be fixed selectively.

The fixing means may include an inflatable body installed on the housing of the small module and extending therein, and pneumatic application means for introducing the air into the inflatable body to expand the inflatable body.

In addition, the present invention further includes a space securing means that secures the collector space and can be supported by a temporary fixing agent for fixing the hollow fiber membrane as the hollow fiber membrane fixing portion is located directly on the collector installed at the bottom of the small module. The means comprises a bag that is loaded into the collector of the housing and a water supply for filling water into the bag.

The water-filled bag is in close contact with the inner wall of the housing to create a collector forming space, and the temporary fixing agent can be formed by using the top of the bag as a bottom.

In this case, the water supply unit may supply cold water or hot water so as to maintain or cure the temporary fixative in the liquid state.

In addition, the present invention may further include a backflow prevention means installed between the central air pipe and the diffuser of each small module to distribute air only to the diffuser.

The reverse flow prevention means may be applied to various structures, for example, the structure using the elastic restoring force of the spring, the structure using the restoring force by its own weight, or the structure using the drive motor. Is not particularly limited as long as it blocks the pipeline.

Here, the non-return means may be installed in the central air pipe, which is the main line of air supply, in addition to the structure installed separately for each small module as described above, and thus may cause a reverse flow from the diffuser throughout the hollow fiber membrane module. To block.

In addition, the present invention may further include an opening and closing means installed on the connection path between the central collection pipe and the collector of each small module to block the pipeline through which the treated water flows as needed.

On the other hand, the present invention is a method for fixing the hollow fiber membrane in the manufacturing process of the small module consisting of the diffuser, the collector and the hollow fiber membrane fixing unit integrally

Inserting a bag into the collector of the housing to secure space;

Fixing the hollow fiber membrane to the housing with a temporary fixative on the secured space;

Shaping the complete fixative on the temporary fixative; recovering the temporary fixative.

In addition, the present invention in order to fix the hollow fiber membrane to the fixing portion of the housing through a liquid temporary fixing agent,

Supplying hot water into the bag;

Raising the temporary fixative to a melting point and dissolving it in a liquid state and pouring it onto the bag;

Forming a hollow fiber membrane bundle in the liquid temporary fixative;

Supplying cold water into the bag to further cure the temporary fixative.

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

1 is a schematic perspective view showing the overall configuration of a hollow fiber membrane module according to an embodiment of the present invention, Figure 2 is a schematic side cross-sectional view showing a coupling structure of the hollow fiber membrane module according to an embodiment of the present invention, 3 is a perspective view showing a part of the configuration of the hollow fiber membrane module according to an embodiment of the present invention.

According to the above drawings, the hollow fiber membrane module 10 is installed vertically and the inlet 13 is formed at regular intervals along the circumferential direction at the bottom thereof so that the treated water flows through the central collecting pipe 12 and the central collecting pipe. (12) the central air pipe 14 is installed in the longitudinal direction and extends through the bottom surface of the central collecting pipe 12 and the outlet 15 is formed at the bottom in the circumferential direction to supply air to the bottom, the vertical center installed It includes a plurality of hollow fiber membrane small module 11 is placed in the longitudinal direction in the collecting pipe 12 and connected to the inlet 13 and the outlet 15 and disposed along the outer circumferential surface of the central collecting pipe 12.

The small module 11 is a place where water treatment is substantially performed. The small module 11 is disposed in a longitudinal direction in the housing 20, which forms an external shape, and a lower end thereof is fixed to the fixing part 22 of the housing 20. The hollow fiber membrane 21 is fixedly installed and is positioned at the lower end of the fixing part 22 of the housing 20 to communicate with the inlet 13 of the central collecting pipe 12. Collector 23, which is in communication with the inner passage of the hollow fiber membrane 21 is collected, the lower portion of the housing 20 is installed in the housing 20 and communicates with the outlet 15 of the central air pipe 14 to blow bubbles And a fixing means for fixing an upper end of the hollow fiber membrane 21 in the form of a free end and a diffuser tube 24 for ejecting to (21).

Here, the central collecting pipe 12 and the central air pipe 14 are installed in the form of a double pipe, and the central air pipe 14 is in charge of the inner pipe role, and the central collection pipe 12 is in charge of the exterior role. Therefore, the central air pipe 14, which is an inner tube, extends to the bottom of the central collecting pipe 12 to communicate with an outlet 15 formed at the bottom of the central collecting pipe 12, and the inlet 13 formed above the outlet 15 has an appearance. It will be in communication with the central collecting pipe (12).

The spacing between the outlet 15 and the inlet 13 may vary depending on the size and number of the small modules 11 disposed along the circumferential surface of the central collection pipe 12, preferably 12 according to the size. The outlet 15 and the inlet 13 are installed at intervals of 30 to 15 degrees along the circumferential surface of the central collecting pipe 12 so that 24 small modules 11 can be installed in the present invention. .

The housing 20 is made of a material such as acrylic or PVC to maintain the outer shape of the small module 11, and as shown in Figure 1 in the trapezoidal form of the angle between the sides of 15 to 30 degrees It is made in the radial direction of the central collection pipe 12 has a plurality of housings 20 is arranged along the outer peripheral surface of the central collection pipe 12 in a state where the side surfaces are in contact with each other.

The inside of the plurality of hollow fiber membranes 21 are arranged in the longitudinal direction, and the collector 23 and the diffuser tube 24 communicating with the inner passages of the hollow fiber membrane 21 fixing part 22 and the hollow fiber membrane 21 at the lower end thereof. The collector 23 and the diffuser 24 are respectively installed at the inlet 13 and the outlet 15 of the central collecting pipe 12 through the connector 27 formed in the housing 20, respectively. Communicating.

Accordingly, each small module 11 is individually connected to the central collection pipe 12 so that only the small module 11 can be detached from the central collection pipe 12 when necessary.

Here, each of the connector 27 formed in the housing 20 or the inlet 13 and the outlet 15 formed in the central collection pipe 12, the airtight holding means such as a packing member for maintaining the airtightness of the connecting portion ( (Not shown) is further installed to prevent leakage of treated water or air at the connection.

In FIG. 1, reference numeral 25 is a band for tying a plurality of small modules 11 arranged along the central collecting pipe 12, and reference numeral 26 denotes a raw water into each housing 20. It is a raw water inlet for inflow, and reference numeral 34 is a module lower support for supporting and fixing the weight of the small module.

In addition, the collector 23 is provided below the hollow fiber membrane 21 fixing part 22 and the hollow fiber membrane fixed to the fixing part 22 in a predetermined space in communication with the connector 27 of the housing 20 ( The end of 21 is extended to the collector 23 so that the inner passage of the hollow fiber membrane 21 communicates with the collector 23.

That is, the fixing part 22 fixing the hollow fiber membrane 21 is attached to the inner wall of the housing 20 directly on the collector 23, and the fixing part 22 is formed on the collector 23 which is an empty space. The procedure to be described later.

In addition, looking at the diffuser 24 as shown in Figure 3 and 4 is provided at the lower end of the housing 20 and communicated with the central air engine 14 through the connector 27 and the outlet 15 The side passage substrate 29 which communicates with the central passage 28 and extends upwardly through the fixing portion 22 along the inner wall while maintaining a gap between the inner passage of the housing 20 and the inner wall of the housing 20. It is formed at a predetermined interval on the side acid substrate 29, a plurality of blowing holes 31 for blowing air to the hollow fiber membrane 21, the communication with the side acid substrate 29 and extends to the center of the housing 20 The central acid substrate 30, which is formed at regular intervals on the central acid substrate 30, includes a plurality of ejection holes 31 for ejecting air to the hollow fiber membrane 21.

Therefore, the air introduced into the diffuser 24 is injected from the outside of the bundle of the hollow fiber membrane 21 to the inside through the blowing hole 31 of the side acid substrate 29 and the blowing hole 31 of the central acid substrate 30. Through) is injected from the inside of the bundle of hollow fiber membrane 21 to the outside, the air can be evenly sprayed to the entire hollow fiber membrane (21).

The side diffusion substrate 29 extends up and down along the side of the housing 20 while maintaining a predetermined clearance with the inner wall of the housing 20. The lower end of the side diffusion substrate 29 has a central passage of the diffuser 24. It is connected to the 28 and the upper end is exposed above the fixing portion 22 in a closed state. Accordingly, the air introduced into the central passage 28 enters the fixing part 22 upward through the gap between the inner wall of the housing 20 and the side acid substrate 29, and blows air 31 formed in the side acid substrate 29. It is ejected to the hollow fiber membrane 21 through.

In addition, the central acid substrate 30 has a structure in which a gap is formed therein, and is connected to the central passage 28 of the diffuser 24 in a state in which the lower end is open, similar to the side acid substrate 29, and the upper end is closed. Air exposed to the fixing part 22 in the state and introduced into the internal gap of the central acid substrate 30 is blown into the hollow fiber membrane 21 through the blowing holes 31 formed on both sides of the central acid substrate 30. do.

Here, the housing 20 has a trapezoidal shape in which the inner end and the outer end are different in length along the radial direction of the central collecting pipe 12, and thus the central acid substrate 30 is formed based on the central collecting pipe. It is preferable to extend toward the center from the outer end of 20), the length of the central acid substrate 30, that is, the length from the outer end of the housing 20 to the end of the central acid substrate 30 is not particularly limited. Do not.

In addition, another embodiment of the central acid substrate is illustrated in Figure 4b, according to the above drawing, the central acid substrate 30, 32, 33 is provided with three are arranged parallel to each other at a predetermined interval In each of the central acid substrates 30, 32, and 33, blow holes 31 are formed at both sides of the central acid substrates 30, 32, 33 so as to blow air into the hollow fiber membranes.

In this case, the central acid substrate 30 located in the middle of the three central acid substrates has the longest length, and the other two central acid substrates 32 and 33 positioned on both sides thereof have a relatively short structure. Since the housing 20 is formed in a trapezoidal shape, the lengths of the two central acid substrates 32 and 33 are preferably adjusted according to the distance from the side of the housing.

In addition, in the case of the structure, the hollow fiber membrane 21 located at the outer leading edge portion of the trapezoidal housing 20 is far from the central acid substrates 30, 32, and 33, and accordingly shown in FIG. As such, the central substrate may be tilted at an angle.

That is, three central mount boards 30.32.33 are provided in the housing 20 of each small module, and the central mount board 30 located in the middle of the three central mount boards is perpendicular to the outer end of the housing 20. The other two central acid substrates 32 and 33 which are installed in both directions and are located along the radial direction with respect to the central collecting pipe 12 are disposed on both sides of the central acid substrates 30, 32 and 33. Thus, the ejection hole 31 is formed at a predetermined interval.

Therefore, the two center mount boards 32 and 33 are inclined with respect to the center mount board 30 so that the ends of the center mount boards 32 and 33 are more biased toward the outer edges of the housing. It is possible to blow air evenly to the whole hollow fiber membrane 21 in 20). In the above embodiment, three central acid substrates are provided, but the number thereof is not particularly limited.

And the fixing means to fix the upper end of the hollow fiber membrane 21 when the small module 11 should be lifted out of the reaction tank during the inspection or maintenance process that is indispensable during manufacturing or operation of the water treatment hollow fiber membrane module 10 If the top of the hollow fiber membrane is not properly fixed by the fixing means, the bottom of the hollow fiber membrane is fixed and the top of the hollow fiber membrane is free to move out of the reaction tank when the hollow fiber membrane itself, the inside diameter of the hollow fiber membrane and the weight of the water contained in the pores This causes the hollow fiber membrane to slump.

This phenomenon occurs more rapidly when the small module 11 is rapidly lifted from the reaction tank in this case. In this case, the hollow fiber membrane 21 is bent and the membrane is broken, or the surface of the membrane is damaged or a fatal defect in the membrane pore, which functions as a separator. Will be lost.

The fixing means for fixing the upper end of the free end of the hollow fiber membrane 21 is located in the upper inside of the housing 20, as shown in FIG. A fixed frame 42 having an air injection passage 41 for fixing the inflatable body 40 to the housing 20 and being connected to the inflatable body 40 to inject air into the inflatable body 40, It is connected to the air injection path 41 includes an air supply pump (not shown) for supplying air.

According to this embodiment, the inflatable body 40 is a balloon is used, preferably a balloon of latex (latex) material.

In addition, the expansion body 40 is preferably installed on the outer end of the housing 20, that is, the outer end relative to the central collection pipe 12 to swell toward the central collection pipe 12, more preferably Preferably it is installed vertically along the longitudinal direction of the housing 20.

Therefore, if the air is supplied to the air inlet 41 by operating the air supply pump before the small module 11 is drawn out of the reactor, the inflatable body 40, which is a balloon, swells inside the housing 20 and expands. The balloon pushes the upper end of the hollow fiber membrane 21 to the inner wall of the housing 20. The hollow fiber membrane 21 is in close contact with the hollow fiber membrane 21 while being driven into the housing 20.

In this state, the hollow fiber membrane 21 is pressed between the inner walls of the housing 20 by the elastic force of the balloon itself so that the hollow fiber membrane 21 can be fixed without physical damage such as crushing or deformation of the membrane surface and membrane pore.

On the other hand, the module 10 distributes the air circulated through the central air pipe 14 at the lower end of the central collection pipe 12 through the outlet 15 only toward the central passage 28 of the diffuser. A backflow prevention means for blocking the flow of air from the central passage of the diffuser to the outlet is further provided.

As shown in FIG. 6, the backflow prevention means includes an air check valve installed at each outlet 15 of the central collection pipe 12.

The air check valve is a spring using an elastic force, the valve seat 50 is installed on the inlet side of the outlet 15, the valve 51 to selectively open and close the valve seat in contact with the valve seat 50, the And a spring seat 52 provided at the outlet side of the outlet 15 and having a hole 53 at the center thereof, and a spring 54 elastically installed between the spring seat 52 and the valve 51. .

Therefore, the air introduced into the central air pipe 14 pressurizes the valve 51 while passing through the outlet 15, and the valve 51 is spaced apart from the valve seat 50 so that the valve seat 50 and the valve 51 are separated. Air escapes through the gaps between the air flows into the central passage 28 of the diffuser through the central hole 53 of the spring seat 52.

And when the air is not supplied to the central air pipe 14, the valve 51 is in close contact with the valve seat 50 by the elastic restoring force of the spring 54, the pipeline is closed and the center in the central passage 28 of the diffuser The backflow phenomenon to the air pipe 14 will not occur.

7A and 7B also illustrate another embodiment of the non-return means.

According to the above drawings, the backflow preventing means is installed inside the central passage 28 and has a passage 55 formed therein in communication with the connector 27 at the center thereof so that the air flows through the valve block 56 and the valve block ( And a blocking plate 58 installed rotatably on the inclined surface 57 formed at the inner end of the 56 to selectively open and close the passage 55.

The blocking plate 58 is axially coupled above the passage 55 to be rotated by its own weight.

Accordingly, the air introduced into the central air pipe 14 is introduced into the passage 55 of the valve block 56 through the outlet 15 and the connector 27, and the blocking plate 58 is moved upward by the inflow air pressure. As it is lifted, air can be freely introduced into the central passage 28 of the diffuser.

When the air is not supplied to the central air pipe, the blocking plate 58 is rotated downward with respect to the valve block 56 by its own weight to block the passage 55 formed in the valve block 56, and the central pipe of the diffuser pipe. It will block backflow from the furnace 28 to the central air engine 14.

In addition, according to another embodiment of the present apparatus, the backflow preventing means is installed in the central air engine in addition to the structure installed in each small module to block the air flow back the entire module at a time.

The backflow preventing means according to another embodiment is well illustrated in FIGS. 8A to 8C, in which the backflow preventing means is installed at the bottom of the central air pipe 14 and communicates with the central air pipe 14 at the center. An inlet hole 71 is installed downward and a check valve block 70 having a plurality of outlet holes 72 for communicating the inlet hole 71 and the outlet 15 with an outer circumferential surface thereof, and in the inlet hole 71. It is installed to be movable up and down and includes a ball (73) which is suspended by the air entering through the inlet hole 71 to communicate the inlet hole 71 and the outlet hole (72).

Herein, the material of the ball 73 is not particularly limited, and when the ball descends to the bottom of the inlet hole 71 by gravity, a portion of the ball in contact with the bottom of the inlet hole to maintain the airtightness with the bottom of the inlet hole is rubber Alternatively, it is preferable that the sealing material 74 made of silicon is further installed.

In addition, as shown in Figure 8b it can be seen that all four discharge holes 72 are provided and connected to the inlet hole 71 of the center is connected to the outer peripheral surface of the check valve block 70.

Accordingly, as shown in FIG. 8A, the air supplied to each of the small modules through the central air pipe 14 normally flows into the check valve block 70 and passes through the inlet hole 71. The ball 73 is lifted by the air pressure flowing through the inlet, and thus the inlet hole 71 and the outlet hole 72 are connected to one pipe line, and the air exits through the inlet hole to the outlet hole. It is supplied to the small module connected to 15).

On the contrary, when the air flows back from the outlet 15 toward the central air engine 14, the air flows into the check valve block 70 through the discharge hole 72, as shown in FIG. 8C. 73 is lowered to the bottom of the inlet hole 71 by its own weight, and the ball 73 is further sealed by the air pressure introduced into the outlet hole 72 while being in close contact with the sealing member 74 installed at the bottom of the inlet hole. ) To be in close contact with the inlet hole (71). Accordingly, the pipes of the discharge hole 72 and the inlet hole 71 are blocked so that the air introduced into the discharge hole cannot be flowed back to the central air pipe 14 through the inlet hole.

8D and 8E illustrate another embodiment of the backflow prevention means installed in the central air engine.

According to the above drawings, the backflow prevention means is installed on the seat 75, which is installed on the inner peripheral surface of the lower end of the central air pipe 14, and the central air pipe 14 via the bracket 76 and the seat 75 It is elastically in close contact with the blocking membrane 77 to selectively open and close the central air engine.

The blocking film 77 has a dome-shaped hemispherical structure and is convexly placed toward the upper part of the central air pipe 14, and the convexly protruding center part is fixed to the bracket 76 installed across the central air pipe.

Accordingly, when the air proceeds from the central air pipe 14 toward the outlet 15, the barrier membrane 77 is pushed in and retracts inward to open between the sheet 75 and the barrier membrane 77, and the air flows therethrough. On the contrary, when air flows back from the outlet 15 to the central air engine 14, the dome-shaped blocking film 77 is brought into close contact with the sheet 75 while being unfolded by air pressure.

Therefore, as the central air pipe 14 is blocked by the blocking film 77 in close contact with the sheet 75, the air cannot be reversed.

On the other hand, the module 10 further includes an opening and closing means that is installed on the connection path between the central collection pipe and the collector of each small module 11 to block the pipeline through which the treated water flows as needed.

9A and 9B illustrate an example of the opening and closing means, and according to the drawing, the opening and closing means is rotatably installed at the lower end of each inlet 13 formed in the central collection pipe 12 and the inlet 13 Stopper 60 to open and close, and the wire 61 is connected to the top of the stopper 60 is installed on the top, the central collection pipe 12 is slidably installed on the lower end is connected to the wire 61 And an actuation bar 62 for pulling the wire 61.

Accordingly, when the operation bar 62 is pulled, the plug 61 connected to the wire 61 is rotated while the wire 61 is pulled to block the inlet 13 connected to the corresponding small module 11, and the inlet 13 The pressure difference applied to the hollow fiber membrane of the small module 11 as a driving power source is not generated, and thus the water treatment function of the small module 11 is stopped.

Here, the O-ring 63 is further installed between the central collecting pipe 12 and the operation bar 62 for airtightness.

In addition, reference numeral 64, which is not described in the drawing, is a guide member to which the wire 61 is guided, and guides the wire 61 toward the inlet 13 forming wall surface of the central collecting pipe 12 to the inlet 13. To maximize the pressing force of the stopper (60).

The stopper 60 is a material having ductility and elasticity, preferably made of rubber, polyurethane, or silicone.

10 is a plan view of the module 10, it can be seen that the structure in which the operation bar 62 for stopping the water treatment function of the small module 11 is installed at a position corresponding to each small module 11 is illustrated. .

Accordingly, during normal use of the small module 11, the operation bar 62 is pushed down to release the wire 61 to rotate the stopper 60 connected to the wire 61 to open the inlet 13, When the hollow fiber membrane in one side of the small module 11 is single threaded, the inlet for connecting the corresponding small module 11 and the central collection pipe 12 by pulling up the operation bar 62 corresponding to the corresponding small module 11. By closing (13), it is possible to stop the function of the small module (11).

When the function of the small module 11 is stopped through the above structure, the area occupied by the small module 11 in the entire module 10 is 1/12 to 1/24, so the effect on the total throughput is about 10%. Will correspond to Therefore, only the small module 11 can be separated from the module 10 without performing a great effect on the total amount of water to be able to perform maintenance and the like.

Here, in order to find the small module 11 in which the single yarn phenomenon occurs in the module 10 including the plurality of small modules 11, it may be easily confirmed through air injection.

That is, when some of the hollow fiber membranes in the entire module 10 are single yarns, turbidity of the treated water is increased, and the color and smell of the treated water are intensified. When this phenomenon occurs, if the process is paused and a constant pressure is injected into the treated water line in the direction opposite to the passage of the treated water, air bubbles rise from the single hollow fiber membrane.

Therefore, it is possible to easily find the small module 11 in which single-shot phenomenon occurs by checking the air bubble rising position.

On the other hand, the fixing portion 22 of the lower portion of the housing 20 is a portion for fixing the lower end of the hollow fiber membrane 21 to the housing 20 through the temporary fixing agent and the complete fixing agent to some extent above the diffuser 24. Since the space (this space becomes the collector communicating with the bottom of the hollow fiber membrane) is to be located, it is necessary to secure a space for securing the space of the collector 23 and to support the temporary fixing agent for fixing the hollow fiber membrane 21. .

To this end, the present embodiment uses a bag of vinyl material as a space securing means.

That is, the space securing means is a vinyl bag which is inserted into the collector 23 forming position in the housing 20 through the connector 27 formed in the housing 20, and is installed in communication with the inside of the plastic bag into the bag It includes a water supply for filling the water.

The water supply unit is preferably to be able to supply cold water or hot water, the reason for this will be described later.

The bag is not particularly limited except that the bag is not deformed by cold water and hot water and must be sufficiently larger than the collector 23 formed in the housing 20.

Looking at the process of fixing the hollow fiber membrane 21 by using the space securing means as follows.

First, the bag is inserted into the diffuser 24 through the connector 27 formed in the housing 20, and the hot water is supplied into the bag to inflate the bag to a predetermined size.

When the hot water is filled into the bag, the bag gradually spreads to the side and is in close contact with the inner wall of the housing 20. When the hot water is continuously supplied, the bag is gradually inflated upward in close contact with the inner wall of the housing 20. It reaches a certain height.

In this way, by filling the bag with hot water, if the space for making the collector 23 inside the housing 20 is secured, a temporary fixing agent is applied to the upper surface of the bag. In this case, the temporary fixing agent may be applied to a predetermined height by pouring it onto the bag through the upper portion of the housing 20 in a state of being dissolved in a liquid state in advance to a melting point.

Then, the hollow fiber membrane 21 is formed of a temporary fixing agent in advance on the liquid temporary fixing agent, and the cold water is supplied into the bag to undergo a step of curing the temporary fixing agent.

As the cold water is supplied into the bag, the temperature of the bag is lowered, thereby solidifying the liquid temporary fixing agent applied thereon.

When the temporary fixing agent is cured, the hollow fiber membrane 21 is completely fixed by injecting a complete fixing agent thereon. In this process, the curing agent generates heat as the perfect fixing agent is cured. The complete fixer, which can dissolve the agent and is formed by rapid heating, has a risk of shrinking itself and forming a crack.

Therefore, after injecting the complete fixer on top of the temporary fixer as described above, the temporary fixer maintains the solid state by continuously circulating low-temperature water into the bag during the time when the complete fixer is formed from the liquid state to the solid state. It is possible to prevent the contraction phenomenon of the complete fixing agent by suppressing the heating of the complete fixing agent.

When the complete fixing agent is completely molded, the temporary fixing agent is recovered and finally, the bag is removed, and the hollow fiber membrane 21 is formed through the fixing part 22 formed on the collector 23 and the upper part of the collector 23. 20) can be fixed in.

Referring to the operation of the present invention, the waste water is introduced into the housing 20 of each small module 11 through the raw water inlet 26 of the housing 20, the hollow of each small module 11 The filtered and filtered water through the desert 21 is collected by the collector 23 of each of the small modules 11 communicated with the inner passage of the hollow fiber membrane 21, and then the connector 27 and the central collection of the housing 20 Through the inlet 13 of the water pipe 12 is introduced into the central collecting pipe 12 is discharged in a batch through the central collecting pipe (12).

And the air supplied through the central air pipe 14 is supplied to the diffuser 24 of each small module 11 through the outlet 15 installed at the bottom of the central collecting pipe 12 and the central tube of each diffuser 24 The air flowing into the furnace 28 passes through the side acid substrate 29 and the central acid substrate 30 connected to the central passage 28 and blows through the blow holes 31 formed in each acid substrate. ) Is ejected inside.

The bubbles thus ejected vibrate the hollow fiber membrane 21 while going up inside the housing 20 and shake off the contaminants stuck to the hollow fiber membrane 21 in this process.

In this case, the bubbles may be ejected evenly on the entire hollow fiber membrane 21 in the housing 20 by simultaneously ejecting from the side and center of the housing 20 through the side acid substrate 29 and the central acid substrate 30. .

As described above, it can be seen that the present invention provides a significantly advanced hollow fiber membrane module. While exemplary embodiments of the present invention have been shown and described, various modifications and other embodiments may be made by those skilled in the art. Such modifications and other embodiments are all considered and included in the appended claims, without departing from the true spirit and scope of the invention.

According to the hollow fiber membrane module and the hollow fiber membrane module manufacturing method according to the present invention as described above, it is possible to easily manufacture a large-capacity hollow fiber membrane.

In addition, it is possible to uniformly apply the temporary fixing agent in the manufacturing process, it is easy to control the temperature during curing of the temporary fixing agent or complete fixation, it is possible to reduce the amount of use, it is possible to minimize the energy loss.

In addition, the operation is simple in the operation process and easy to repair in the event of single death.

1 is a schematic perspective view showing the overall configuration of a hollow fiber membrane module according to an embodiment of the present invention,

Figure 2 is a schematic side cross-sectional view showing a coupling structure of the hollow fiber membrane module according to an embodiment of the present invention,

3 is a perspective view showing a part of the configuration of the hollow fiber membrane module according to an embodiment of the present invention,

4A is a cross-sectional view of FIG. 3 for illustrating a diffuser structure according to an embodiment of the present invention;

4B and 4C are cross-sectional views of FIG. 3 for illustrating a diffuser structure according to another embodiment of the present invention;

Figure 5 is a schematic side cross-sectional view showing the upper structure of the hollow fiber membrane module according to an embodiment of the present invention,

6 is a schematic side cross-sectional view showing a structure for preventing backflow of air according to an embodiment of the present invention;

7a and 7b is a schematic side cross-sectional view showing an air backflow prevention structure according to another embodiment of the present invention;

8a to 8e is a schematic view showing an air backflow prevention structure according to another embodiment of the present invention,

9A is a partial cross-sectional view showing a small module function blocking structure according to an embodiment of the present invention;

9B is an operating state diagram of a small module function blocking structure according to an embodiment of the present invention;

10 is a plan view illustrating a small module function blocking structure according to an embodiment of the present invention.

Explanation of symbols on main parts of drawing

10: hollow fiber membrane module 11: small module

12: central collection pipe 13: inlet

14: central public institution 15: exit

20 housing 21 hollow fiber membrane

22: fixing part 23: collector

24: diffuser 25: band

26: raw water inlet 27: connector

28: central passage 29: side mount substrate

30, 32, 33: central substrate 31: ejection hole

40: inflatable 41: injection furnace

42: fixed frame 50: valve seat

51: valve 52: spring seat

53: hole 54: spring

55: passage 56: valve block

57: slope 58: blocking plate

60: plug 61: wire

62: operating bar 63: O-ring

64: guide member

Claims (20)

At the bottom, a plurality of inlets are formed along the circumferential direction and the central collection pipe through which the treated water is distributed. A central air pipe installed in the longitudinal direction inside the central collecting pipe and extending through the bottom surface of the central collecting pipe and having a plurality of outlets formed at a lower end thereof in a circumferential direction thereof; A plurality of housings disposed in the longitudinal direction of the central collecting pipe and connected to the inlet and the outlet and disposed along the outer circumferential surface of the central collecting pipe; a hollow fiber membrane provided in each housing and undergoing water treatment due to a pressure difference; and a bottom of the hollow fiber membrane Fixed to secure the housing to the housing, is installed at the bottom of the housing and in communication with the inner passage of the hollow fiber membrane to collect the treated water passed through the hollow fiber membrane and to distribute it to the inlet, installed in the lower portion of the housing and in communication with the outlet Multiple small modules with diffuser to blow bubbles into the hollow fiber membrane Hollow fiber membrane module comprising a. The apparatus of claim 1, further comprising: an inflatable body positioned inside the upper portion of the housing and swelling therein; The fixed frame is formed, comprising an air supply pump for supplying air is connected to the air inlet, hollow fiber membrane module further comprises a fixing means for selectively fixing the top of the hollow fiber membrane. The hollow fiber membrane module according to claim 2, wherein the hollow fiber membrane module is a balloon made of the inflatable elastic material. The collector space according to claim 1, further comprising a bag charged into a collector forming position inside the housing through a connector formed in the housing, and a water supply part installed to communicate with the inside of the bag to fill water into the bag. Hollow fiber membrane module, characterized in that it further comprises a space securing means for securing and the temporary fixing agent for the fixing part. The hollow fiber membrane module of claim 4, wherein the water supply unit is configured to supply cold water or hot water. 5. The housing of claim 1, 2 or 4, wherein the housing is disposed in the radial direction of the central collecting pipe in the form of a trapezoidal cross section and is disposed along the outer circumferential surface of the central collecting pipe with a plurality of housings in contact with each other. Hollow fiber membrane module, characterized in that. According to claim 6, The diffuser is provided in the lower end of the housing and the central passage communicating with the central air engine, and the communication with the central passage and the upper portion of the fixing portion along the inner wall while maintaining a gap between the inner wall of the housing An extended side acid substrate, a plurality of ejection holes formed at predetermined intervals on the side acid substrate, for ejecting air to the hollow fiber membrane, a central acid substrate communicating with the side acid substrate and extending toward the center of the housing, the central acid substrate The hollow fiber membrane module, characterized in that it is formed at a predetermined interval to include a plurality of blowing holes for blowing air to the hollow fiber membrane. 8. The hollow fiber membrane module according to claim 7, wherein the central acid substrate is provided with one or more than two central acid substrates and arranged in parallel with each other. 8. The hollow fiber membrane module according to claim 7, wherein the central acid substrate is provided with one or more than two central acid substrates, and each of the central acid substrates is disposed along the central collecting pipe in a radial direction. The hollow fiber membrane according to claim 1 or 2 or 4, further comprising a backflow preventing means provided between the central air pipe and the diffuser of each of the small modules to distribute air only to the diffuser. module. The valve according to claim 10, wherein the non-return means includes a valve seat installed at the outlet inlet of the central air engine, a valve selectively contacting the valve seat to open and close the valve seat, and an air outlet at the outlet of the outlet. Hollow fiber membrane module comprising a spring seat is formed, the spring is elastically installed between the spring seat and the valve. The valve block of claim 10, wherein the backflow preventing means is provided inside the central passage of the diffuser and has a passage communicating with the connector at the center thereof so that air flows, and an inclined surface formed at the inner end of the valve block. A hollow fiber membrane module, characterized in that it comprises a blocking plate which is installed to be rotatable to selectively open and close the passage. The check valve block according to claim 10, wherein the backflow prevention means includes a check valve block installed at a lower end of the central air pipe and having an inflow hole communicating with the central air pipe downwardly and having a plurality of discharge holes communicating with the inflow hole and the outlet at the outer circumferential surface thereof. And a ball installed in the inflow hole so as to be movable up and down and floating by air entering through the inflow hole to communicate the inflow hole and the outflow hole. The hollow fiber membrane module according to claim 13, wherein the inlet hole further includes a sealing material at a bottom thereof. 11. The method of claim 10, wherein the backflow prevention means comprises a seat installed on the inner peripheral surface of the lower end of the central air pipe, and the barrier is installed in the central air pipe via a bracket and elastically close to the seat to selectively open and close the central air pipe Hollow fiber membrane module, characterized in that. According to claim 1, 2 or 4, characterized in that it further comprises an opening and closing means is installed on the connection path between the central collection pipe and the collector of each small module to block the pipeline through which the treated water flows as needed. Hollow fiber membrane module. 17. The method of claim 16, wherein the opening and closing means is rotatably installed at the lower end of each inlet formed in the central collecting pipe and the plug for opening and closing the inlet, the wire connected to the top of the plug, sliding on the top of the central collecting pipe The hollow fiber membrane module, which is installed to be possible and has a lower end connected to the wire and including an operation bar for pulling the wire. 18. The hollow fiber membrane module according to claim 17, wherein the stopper is made of rubber, polyurethane or silicone. In the method of fixing the hollow fiber membrane in the housing in the manufacturing process of the small module composed of the diffuser, the collector and the hollow fiber membrane fixing unit integrally in the housing, Inserting a bag into the collector of the housing and injecting water to secure a space; Pouring the temporary fixative over the secured space and forming the bundle of hollow fiber membranes into the temporary fixative; Curing the temporary fixative and molding the complete fixative thereon, Curing the complete fixative, Recovering the temporary fixative Hollow fiber membrane module manufacturing method comprising a 20. The method of claim 19, further comprising the step of supplying hot water into the bag before pouring the temporary fixer, and forming a bundle of hollow fiber membranes into the liquid temporary fixer and then supplying cold water into the bag. Hollow fiber membrane module manufacturing method.