KR20120011613A - Vertical Type Hollow Fiber Membrane Module and Filtering System Using The Same - Google Patents

Abstract

PURPOSE: A vertical hollow membrane module and a filtering system using the same are provided to increase the integrity of a filtering membrane and the module with respect to plants of various sizes by being vertically assembled with other vertical hollow membrane modules. CONSTITUTION: A vertical hollow membrane module includes an upper header, a lower header, and a hollow membrane. The upper header includes a first water collecting space. The lower header includes a second water collecting space. The hollow membrane is located between the upper header and the lower header. Both end parts of the hollow membrane are ported to the upper header and the lower header. An outlet is formed at the upper side of the upper header. An inlet is formed at the lower side of the lower header. A filtering system includes a first vertical hollow membrane module(100), a second vertical hollow membrane module(200), and a water collecting pipe(400). The water collecting pipe secures the transferring path of filtering water. Filtering water generated from the second vertical hollow membrane module is transferred to the water collecting pipe through the first vertical hollow membrane module.

Description

Vertical Hollow Fiber Membrane Module and Filtering System Using The Same}

The present invention relates to a vertical hollow fiber membrane module and a filtration system using the same, and more particularly, it can be assembled in a vertical direction with other vertical hollow fiber membrane module, so that the filtration membrane and the module for all the plants of various sizes (plant) The present invention relates to a vertical hollow fiber membrane module and a filtration system using the same that not only enable high-integration implementation but also eliminate the need to change the height of the module according to the size of the treatment plant.

The separation method using a filtration membrane has many advantages over the separation method using heating or phase change. One of them is that the desired water quality can be stably obtained by using a filtration membrane having an appropriate pore size, thereby increasing the reliability of the process. In addition, since the use of a filtration membrane does not require an operation such as heating, there is an advantage that it can be used in a separation process using microorganisms that may be affected by heating.

One of the filtration membranes is a hollow fiber membrane in the form of a tube. Hollow fiber membranes have been widely used in the field of precision filtration such as sterile water, drinking water and ultrapure water production.In recent years, hollow fiber membranes have been used for sewage treatment, solid-liquid separation in septic tanks, removal of suspended solids (SS) from industrial wastewater, filtration of river water, and industrial applications. Filtration of water, filtration of water in a receiving field, and the like are expanding their application ranges.

Immersion type hollow fiber membrane module that separates solid components such as impurities or sludge by immersing the hollow fiber membrane module directly in the water tank of the fluid to be treated and selectively permeating only the fluid into the hollow fiber membrane by applying negative pressure to the hollow of the hollow fiber membrane There is this.

Immersion hollow fiber membrane module includes a vertical type and a horizontal type. The vertical hollow fiber membrane module refers to a hollow fiber membrane module in which the length direction of the hollow fiber membrane is perpendicular to the water surface during the filtration operation. On the other hand, the horizontal hollow fiber membrane module refers to a hollow fiber membrane module in which the length direction of the hollow fiber membrane is parallel to the water surface during the filtration operation.

If the pores of the hollow fiber membranes are clogged, the membrane filtration efficiency is reduced. In the case of the horizontal hollow fiber membrane module, pores may be blocked by the accumulation of impurities on the hollow fiber membrane by gravity. Therefore, it can be said that the vertical hollow fiber membrane module has excellent pollution resistance compared to the horizontal hollow fiber membrane module. For this reason, horizontal hollow fiber membrane modules are mainly used to treat relatively low pollution water, such as water purification plants, and vertical hollow fiber membrane modules are mainly used to treat relatively high pollution water, such as sewage treatment plants.

Sewage treatment plants that require vertical hollow fiber membranes vary in size. Tanks in large treatment plants are quite deep, for example, 3 to 6 meters, whereas tanks in small and medium treatment plants have a low depth. When immersing vertical hollow fiber membranes of the same height in tanks of varying depths, the module / membrane density of the filtration system will depend on the depth of the tank. As a result, a satisfactory degree of integration cannot be achieved and the recovery rate of the filtration system is lowered.

In order to achieve high recovery rate through high integration, vertical hollow fiber membrane modules having different heights should be provided for each tank depth, which has a problem of degrading production efficiency and process convenience.

Accordingly, the present invention relates to a filtration system and method which can avoid the problems caused by the above limitations and disadvantages of the related art.

One aspect of the present invention is a vertical hollow fiber membrane module and a filtration system using the same, which can be assembled in a vertical direction with other vertical hollow fiber membrane module to enable highly integrated implementation of the filtration membrane and the module for both plants of various sizes To provide.

Another aspect of the present invention is to provide a vertical hollow fiber membrane module and a filtration system using the same to eliminate the need to manufacture modules of different heights in accordance with the size of the treatment plant to improve production efficiency and manufacturing process convenience.

Further features and advantages of the invention will be described below, and in part will be apparent from such techniques. Alternatively, other features and advantages of the present invention may be learned from the practice of the present invention. Objects and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to achieve the above advantages, and in accordance with the object of the present invention, an upper header having a first catchment space therein; A lower header positioned below the upper header and having a second collecting space therein; And a hollow fiber membrane positioned between the upper header and the lower header, wherein both ends of the hollow fiber membrane are connected to the upper header and the lower header such that the hollow of the hollow fiber membrane communicates with the first and second collecting spaces. Ported to each, the upper surface of the upper header is formed with an outlet (outlet), the lower surface of the lower header is provided with a vertical hollow fiber membrane module, characterized in that the inlet (inlet) is formed.

As another aspect of the invention, the first vertical hollow fiber membrane module; A second vertical hollow fiber membrane module; And a collecting pipe for providing a movement path of the filtrate generated by the first and second vertical hollow fiber membrane modules, wherein the filtrate generated by the second vertical hollow fiber membrane module is A filtration system is provided which moves to the sump pipe through a first vertical hollow fiber membrane module.

It is to be understood that both the foregoing general description and the following detailed description are intended to illustrate or explain the invention, and to provide a more detailed description of the invention in the claims.

According to the present invention, the vertical hollow fiber membrane modules can be assembled in a direction perpendicular to the water surface, so that high integration of the filtration membrane and the module can be realized for all plants of various sizes, and as a result, regardless of the size of the treatment plant The high recovery rate of the filtration system can be ensured.

In addition, since it is not necessary to manufacture vertical hollow fiber membrane modules of different heights according to the size of the treatment plant, it is possible to improve the production efficiency and manufacturing process convenience of the vertical hollow fiber membrane module.

Other effects of the present invention, such as eliminating the need for a frame, can improve the convenience of repair / replacement of modules and achieve higher levels of integration, will be described in detail below in conjunction with the related technical configurations.

The accompanying drawings are included to assist in understanding the present invention and to form a part of the specification, to illustrate embodiments of the present invention, and to explain the principles of the present invention together with the detailed description of the invention.
1 shows a vertical hollow fiber membrane module according to an embodiment of the present invention,
2 is a cross-sectional view of a filtration system according to an embodiment of the present invention,
3 shows a filtration system according to another embodiment of the invention,
4 is a perspective view of a filtration system according to an embodiment of the present invention,
5 shows a coupling between a unit pipe and upper headers according to an embodiment of the present invention,
6 illustrates a coupling between upper headers according to an embodiment of the present invention,
7 is a cross-sectional view of a filtration system according to another embodiment of the present invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Therefore, the present invention encompasses all changes and modifications that come within the scope of the invention as defined in the appended claims and equivalents thereof.

As used herein, the term "vertical hollow fiber membrane module" means a hollow fiber membrane module in which the longitudinal direction of the hollow fiber membrane is perpendicular to the water surface during the filtration operation, and both ends of the hollow fiber membrane are respectively disposed on the upper header and the lower header. In addition to the ported collecting type of both ends collecting type (both ends collecting type), the module of the single end collecting type (one end of the hollow fiber membrane is ported to the upper header and the other end is free end).

Hereinafter, an embodiment of a vertical hollow fiber membrane module of the present invention and a filtration system using the same will be described in detail with reference to the accompanying drawings.

1 shows a vertical hollow fiber membrane module according to an embodiment of the present invention.

As shown in FIG. 1, the vertical hollow fiber membrane module according to an embodiment of the present invention includes an upper header 10, a lower header 20 positioned below the upper header 10, and the upper header ( 10) and a hollow fiber membrane 30 positioned between the lower header 20.

The upper header 10 has a first collecting space 11 therein. Similarly, the lower header 20 also has a second collecting space 21 therein. Both ends of the hollow fiber membrane 30 are potted through the potting agent 23 on the upper header 10 and the lower header 20, respectively. The hollow of the hollow fiber membrane 30 is in communication with the first and second collecting spaces 11 and 21, respectively. Therefore, the filtered water that has passed through the hollow fiber membrane 30 flows into the first collecting space 11 and / or the second collecting space through the hollow of the hollow fiber membrane 30. The direction of the filtered water flow in the hollow of the hollow fiber membrane 30 is determined according to the direction in which a negative pressure for filtration is applied.

According to one embodiment of the invention, since the negative pressure for filtration is applied only through the outlet 12 formed on the upper header 10, more specifically, the upper header 10, the hollow fiber membrane 30 The filtered water flows to the first collecting space 11 of the upper header 10, and is discharged from the first collecting space 11 through the outlet 12. The filtered water discharged through the outlet 12 may flow into a collecting pipe (not shown) or the lower header (not shown) of another vertical hollow fiber membrane module.

On the other hand, an inlet 22 is formed on the lower surface of the lower header 20.

If another vertical hollow fiber membrane module is coupled to the bottom of the vertical hollow fiber membrane module according to an embodiment of the present invention, the negative pressure for filtration through the inlet 22 can be transmitted to the other vertical hollow fiber membrane module. have. In this case, the filtered water generated by the other vertical hollow fiber membrane module is introduced into the second collecting space 22 through the injection hole 22 and then through the hollow fiber membrane 30 and the first collecting space 11. It is discharged through the outlet 12 of the upper header 10.

According to an embodiment of the present invention, the injection port 22 of the lower header 20 can be opened and closed. Thus, when no other module is coupled under the lower header 20, in order to prevent the raw water to be treated from entering the second catchment space 21 through the inlet 22, for example, a cap ( The injection hole 22 may be closed using a cap 50.

On the other hand, a conventional vertical hollow fiber membrane module is immersed in a tank while inserted in a frame referred to as a cassette or skid. That is, each of the upper header 10 and the lower header 20 of the module is immersed into the tank in a state in which it is mounted on the frame. However, the use of such frames limits the integration of membranes / modules in tanks. In order to solve this problem, the vertical hollow fiber membrane module according to an embodiment of the present invention further includes a support bar 40 for maintaining a gap between the upper header 10 and the lower header 20. This avoids the need for a frame, which makes it possible to achieve high integration of the filtration system.

In general, the hollow fiber membrane module may cause damage to the hollow fiber membrane 30 during the filtration operation. The module in which the hollow fiber membrane 30 is damaged must be taken out of the tank once. Subsequently, if the damaged part is repaired or cannot be repaired, the module itself must be replaced. If filtration is performed while multiple hollow fiber membrane modules are inserted into the frame, the frame must be removed from the tank once a particular hollow fiber membrane module needs to be repaired or replaced, and then the module must be removed from the frame. That is, the efficiency of the filtration operation is significantly reduced since damaged modules as well as normal modules have to be removed from the tank.

Since the vertical hollow fiber membrane module according to an embodiment of the present invention does not require the use of a frame, only the module can be taken out of the tank when a specific module is damaged. As a result, it is possible to ensure superior filtration efficiency as compared to a normal vertical hollow fiber membrane module requiring the use of a frame.

For convenience of removing only the damaged module from the tank, the vertical hollow fiber membrane module according to an embodiment of the present invention may be formed with a handle 13 on the upper surface of the upper header (10).

2 is a cross-sectional view of a filtration system according to one embodiment of the invention.

Filtration system according to an embodiment of the present invention is the first and second vertical hollow fiber membrane modules (100, 200) coupled to each other in the vertical direction, and the water collecting to provide a movement path of the filtrate generated by them And a collecting pipe 400.

According to the present invention, the filtered water generated by the second vertical hollow fiber membrane module 200 moves to the collecting pipe 400 only through the first vertical hollow fiber membrane module 100. This will be described in more detail below.

As shown in FIG. 2, the first vertical hollow fiber membrane module 100 may include a first upper header 110, a first lower header 120, and the first upper header 110 and the first lower header. The first hollow fiber membrane 130 is arranged vertically between the (120). In general, a bundle of the first hollow fiber membranes 130 is present between the first upper header 110 and the first lower header 120.

The first upper header 110 having a water collecting space 111 therein has a first outlet 112 on an upper surface thereof and communicates with the water collecting pipe 400 therethrough.

A first injection hole is formed on a lower surface of the first lower header 120 having a collecting space 121 therein.

The second vertical hollow fiber membrane module 200 is vertically arranged between the second upper header 210, the second lower header 220, and the second upper header 210 and the second lower header 220. The second hollow fiber membrane 230 is included. In general, a bundle of the second hollow fiber membranes 230 is present between the second upper header 210 and the second lower header 220.

The second upper header 210 having a collecting space 211 therein has a second outlet 212 on its upper surface. The second outlet 212 is inserted into and coupled to the first inlet of the first lower header 120. As a result, the first lower header 120 and the second upper header 210 communicate with each other through the first inlet and the second outlet 212.

A second injection hole is formed on a lower surface of the second lower header 220 having a collecting space 221 therein. The second inlet is closed by the cap 250 to prevent raw water to be treated from entering the water collecting space 221 of the second lower header 220 through the second inlet.

The negative pressure for filtration of the first vertical hollow fiber membrane module 100 is transmitted to the first hollow fiber membrane 130 through the collecting pipe 400 and the first upper header 110, and the second vertical hollow fiber membrane module ( The negative pressure for filtration of the 200 is carried out through the collecting pipe 400, the first upper header 110, the first hollow fiber membrane 130, the first lower header 120, and the second upper header 210. The hollow fiber membrane 230 is delivered. Accordingly, the filtrate that has passed through the second hollow fiber membrane 230 may filter the second upper header 210, the first lower header 120, the first hollow fiber membrane 130, and the first upper header 110. Go through the water collecting pipe 400 sequentially.

Through the above configuration, it is possible to assemble the vertical hollow fiber membrane modules in the direction perpendicular to the water surface, so that it is possible to implement high integration of the filtration membrane and the module for all treatment plants of various sizes, and as a result, the filtration system regardless of the size of the treatment plant High recovery rate can be secured. In addition, since it is not necessary to manufacture vertical hollow fiber membrane modules of different heights according to the size of the treatment plant, it is possible to improve the production efficiency and manufacturing process convenience of the vertical hollow fiber membrane module.

Although not shown, the second vertical hollow fiber membrane module according to another embodiment of the present invention includes a second upper header and a second hollow fiber membrane, and one end of the second hollow fiber membrane is ported to the second upper header. And the other end of the second hollow fiber membrane may be a single end catchment type module that is a free end. Even in this case, the filtered water passing through the second hollow fiber membrane is sequentially passed through the second upper header, the first lower header 120, the first hollow fiber membrane 130, and the first upper header 110. Go to 400).

Meanwhile, the filtration system shown in FIG. 3 may also be considered in order to combine two or more vertical hollow fiber membrane modules in a vertical direction. According to the filtration system shown in FIG. 3, both the upper and lower headers 510, 520, 610, and 620 of the vertical hollow fiber membrane modules 500, 600 have outlets 512, 522, 612, and 622, respectively. Have

The outlets 512, 522, 612, and 622 are individually communicated with the common pipe 700 disposed in a direction perpendicular to the water surface. Accordingly, the filtered water passing through the hollow fiber membranes 530 and 630 moves to the common pipe 700 through these outlets 512, 522, 612, and 622, respectively.

Since the filtration system of the above structure requires a lot of pipe installation, there is a problem that the material and labor costs are higher and the installation process is complicated. Moreover, it is also disadvantageous for high integration of the filtration system since such pipes must be installed in the tank.

4 to 6 are views for showing the coupling of the module and the collection pipe and the coupling between the modules according to an embodiment of the present invention.

In general, as the water treatment proceeds, a decrease in filtration performance due to contamination of the hollow fiber membrane occurs. Therefore, in order to minimize contamination of the hollow fiber membranes, aeration cleaning is required to be performed during the water treatment. For such an acid cleaning, air bubbles blown out from the diffuser rise to remove contaminants attached to the hollow fiber membranes. Air bubbles ejected from the diffuser and the resulting turbulence can cause collisions between the modules and thereby damage to the modules.

According to one embodiment of the present invention, it is possible to prevent collisions between the vertical hollow fiber membrane modules and thereby damage to the modules during the air cleaning without the use of a frame. Hereinafter, this will be described in detail with reference to FIGS. 4 to 6.

The collecting pipe 400 according to the embodiment of the present invention may include a plurality of unit pipes 410, 420, 430, and 440.

The unit pipe 410 has at least one first fastening hole 411 formed along the length direction of the header of the vertical hollow fiber membrane module. The first upper header 110 of the first vertical hollow fiber membrane module 100 which is directly coupled to the unit pipe 410 also has at least one first fastening hole 114 formed along its length direction at least at one end thereof. Have As the first fastening member 800a is inserted into the first fastening holes 411 and 114 of the unit pipe 410 and the first upper header 110, the unit pipe 410 and the first vertical hollow fiber membrane module 100 are inserted. ) Can further enhance the bond between.

In order to strengthen the coupling between the first and second vertical hollow fiber membrane modules 100 and 200 vertically coupled to each other, the lower header of the first vertical hollow fiber membrane module 100 and the second vertical hollow fiber membrane module ( Each of the upper headers of the 200 has at least one second fastening hole 124, 214 formed along at least its longitudinal direction, and a second fastening member 800b is inserted into the second fastening holes 124, 214. do.

The filtration system according to an embodiment of the present invention may further include a third vertical hollow fiber membrane module 300 including a third upper header 310, a third lower header, and a third hollow fiber membrane. The third vertical hollow fiber membrane module 300 is parallel to the first vertical hollow fiber membrane module 100 in a direction perpendicular to the longitudinal direction of the first upper header 110 and the longitudinal direction of the first hollow fiber membrane 130, respectively. Located. That is, the first and third upper headers 110 and 310 are parallel to each other, and a longitudinal side of the first upper header 110 and a long side surface of the third upper header 310 are mutually opposite. To face.

The unit pipe 410 is commonly coupled to the first and third upper headers 110 and 310.

Each of the first and third upper headers 110 and 310 has third fastening holes 115 and 315 formed along at least one end of the first and third hollow fiber membranes along the length direction of the first and third hollow fiber membranes. The third fastening member 900 is inserted into the fastening holes 115 and 315.

7 is a cross-sectional view of a filtration system according to another embodiment of the present invention.

The coupling scheme between the modules 100a and 200a and 100b and 200b vertically coupled to each other in the filtration system of FIG. 7 is the same as the embodiment described above.

However, as shown in FIG. 7, in the filtration system according to another embodiment of the present invention, four vertical hollow fiber membrane modules 100a, 100b, 200a, and 200b are coupled to each other vertically and horizontally in one plane. It has that feature. That is, the modules 100a, 100b located at the top are arranged side by side along the longitudinal direction of the upper headers 110a, 110b such that the upper headers 110a, 110b are arranged in a line along their respective longitudinal directions. do.

Modules 200a and 200b located below are also arranged side by side along the length direction of the headers. Modules 100a and 100b located at the top are commonly coupled to the collecting pipe 400 and communicate with the collecting pipe 400 through respective outlets 112a and 112b. This configuration can further improve the integration of the filtration system.

10: upper header 20: lower header 30: hollow fiber membrane
40: support rod 50: cap
100, 200, 300, 500, 600: vertical hollow fiber membrane module
400: water collecting pipe 700: common piping
800a, 800b, 900: fastening member

Claims (15)

An upper header having a first collecting space therein;
A lower header positioned below the upper header and having a second collecting space therein; And
It includes a hollow fiber membrane located between the upper header and the lower header,
Both ends of the hollow fiber membrane are ported to the upper header and the lower header, respectively, so that the hollow of the hollow fiber membrane communicates with the first and second collecting spaces.
The outlet is formed on the upper surface of the upper header,
Vertical hollow fiber membrane module, characterized in that the inlet is formed on the lower surface of the lower header. The method of claim 1,
The injection hole is a vertical hollow fiber membrane module, characterized in that the opening and closing. The method of claim 2,
The injection hole is a vertical hollow fiber membrane module, characterized in that opening and closing by a cap (cap). The method of claim 1,
Vertical hollow fiber membrane module further comprises a support bar for maintaining a gap between the upper header and the lower header. The method of claim 1,
Vertical hollow fiber membrane module, characterized in that the handle is formed on the upper surface of the upper header. A first vertical hollow fiber membrane module;
A second vertical hollow fiber membrane module; And
A collecting pipe for providing a flow path of the filtrate generated by the first and second vertical hollow fiber membrane modules,
Filtration water generated by the second vertical hollow fiber membrane module is moved to the collecting pipe through the first vertical hollow fiber membrane module. The method according to claim 6,
The first vertical hollow fiber membrane module includes a first upper header, a first lower header, and a first hollow fiber membrane vertically arranged between the first upper header and the first lower header,
The second vertical hollow fiber membrane module includes a second upper header, a second lower header, and a second hollow fiber membrane vertically arranged between the second upper header and the second lower header,
Filtration system passing through the second hollow fiber membrane is moved to the collecting pipe through the second upper header, the first lower header, the first hollow fiber membrane, and the first upper header sequentially. . The method of claim 7, wherein
The first upper header communicates with the sump pipe through a first outlet at an upper surface thereof;
The first injection hole is formed on the lower surface of the first lower header,
A second outlet is formed on the upper surface of the second upper header,
And the first lower header and the second upper header communicate with each other through the first inlet and the second outlet. The method of claim 7, wherein
Each of the first upper header and the collecting pipe has at least one first coupling hole formed along a length direction of the first upper header,
And the filtration system further comprises a first coupling member inserted into the first fastening holes. The method of claim 7, wherein
Each of the first lower header and the second upper header has at least one second fastening hole formed along a length direction thereof.
The filtration system further comprises a second fastening member inserted into the second fastening holes. The method of claim 7, wherein
And a third vertical hollow fiber membrane module including a third upper header, a third lower header, and a third hollow fiber membrane vertically arranged between the third upper header and the third lower header,
And said catchment pipe comprises a unit pipe commonly coupled to said first upper header and said third upper header. The method of claim 11,
The first and third vertical hollow fiber membrane modules are arranged such that the first and third upper headers are parallel to each other and the longitudinal side of the first upper header and the long side of the third upper header face each other. And side by side along a direction perpendicular to both the longitudinal direction of the first and third upper headers and the longitudinal direction of the first and third hollow fiber membranes. The method of claim 11,
Each of the first upper header and the third upper header has a third fastening hole formed along at least one end portion along a length direction of the first and third hollow fiber membranes,
And a third fastening member inserted into the third fastening holes. The method of claim 11,
The first and third vertical hollow fiber membrane modules are arranged side by side along the length direction of the first and third upper headers such that the first and third upper headers are arranged in a line along their respective longitudinal directions. Characterized by a filtration system. The method according to claim 6,
The first vertical hollow fiber membrane module includes a first upper header, a first lower header, and a first hollow fiber membrane vertically arranged between the first upper header and the first lower header,
The second vertical hollow fiber membrane module includes a second upper header and a second hollow fiber membrane, one end of the second hollow fiber membrane is ported to the second upper header, and the other end of the second hollow fiber membrane is a free end. Is,
Filtration system passing through the second hollow fiber membrane is moved to the collecting pipe through the second upper header, the first lower header, the first hollow fiber membrane, and the first upper header sequentially. .

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