KR100740048B1 - Hollow fiber membrane module and apparatus for water treatment with hollow fiber membrane module - Google Patents

Abstract

A hollow fiber membrane module and an apparatus for water treatment by using the same are provided to mount a plurality of hollow fiber membrane modules in a single pressure container for reducing an installation area and realizing a large-scaled water treatment apparatus easily to operate under high pressure, and improve removing of pollutants from surfaces of the modules by scouring caused by air bubbles by using fluid spraying nozzles. A water treatment apparatus has a pressure container(180) receiving a hollow fiber membrane module assembly formed of a plurality of hollow fiber membrane modules(110) disposed regularly with a uniform interval, wherein fixing parts are mounted at upper and lower ends of the module assembly in the container. The fixing part includes upper and lower fixing plates(122,124) fixed by a plurality of supporting rods(123) for fixing the hollow fiber membrane modules in contact, and a lower separation plate(127) fixed to a bottom surface of the lower fixing plate for forming a distribution space(125) for separating compressed air and water from each other. In each of the hollow fiber membrane modules, a plurality of hollow fiber membrane elements are mounted to the coupling holes of a sub header and an air header respectively through head caps and lower caps for filtering introduced water, and a plurality of water spraying nozzles are respectively mounted to the lower cap and the air header for spraying the introduced water to generate vibration of membranes and scouring of air bubble.

Description

Hollow fiber membrane module and water treatment device using same {Hollow fiber membrane module and Apparatus for water treatment with hollow fiber membrane module}

1 is a cross-sectional view showing a water treatment device according to the present invention.

2 is a cross-sectional view of the hollow fiber membrane module according to the present invention,

3 is a sectional view showing a header according to the present invention;

4 is a cross-sectional view showing an air header according to the present invention;

5 is a sectional view showing a header cap according to the present invention;

6 is a cross-sectional view showing a hollow fiber membrane element according to the present invention,

7 is a cross-sectional view showing a lower cap according to the present invention,

8 is a sectional view showing an upper cap according to the present invention;

9 is a cross-sectional view showing an application state of the hollow fiber membrane module according to the present invention.

Explanation of symbols on the main parts of the drawings

100: water treatment device 110: hollow fiber membrane module

111: support tube 112: hollow fiber membrane element

113: outer 114: the header

115: air header 116: header cap

118a: fluid spray nozzle 118b: fluid spray nozzle

120: treated water outlet 121: treated water space

122: upper fixing plate 123: support rod

124: lower fixing plate 125: distribution space

126: discharge space 127: lower separator

130: filtrate outlet 131: sludge discharge outlet

132: air outlet 140: fluid inlet

150: lower cap 160: head cap

151,161: projection 152,162: groove

163: cutting groove 180: pressure vessel

181: body 182: upper plate

183: lower dish 190: outer frame

The present invention relates to a water treatment apparatus using a hollow fiber membrane module, and in particular, the hollow fiber membrane module is embedded in a pressure vessel to maximize the filtration area as well as to maximize the removal efficiency of contaminants attached to the hollow fiber membrane module And a water treatment apparatus using the same.

In general, the hollow fiber membrane module is used as a filter medium of the hollow fiber membrane water treatment device in the process of purifying contaminated water, and the hollow fiber membrane module has a long packing density due to its high packing density and thus has thousands of hollow fiber membrane chambers. It consists of tens of thousands arranged in.

However, since the hollow fiber membrane water treatment apparatus using the hollow fiber membrane module, a module formed by bonding a single hollow fiber membrane module with an adhesive to one end in one housing is generally employed, the hollow fiber membrane module is a module for processing a large capacity. There was a difficult problem making.

For this reason, the area according to the installation of the hollow fiber membrane module is required a lot, the installation cost is also high, and the material of the housing has a disadvantage that the operating pressure is less than 5kg / ㎠.

In addition, since the hollow fiber membranes constituting the hollow fiber membrane module are irregularly focused, there is a problem in that the filtration rate is rather low, so that the application of a large capacity water treatment device has many problems.

In addition, bubbles are generated by the nozzle to remove contaminants attached to the outer surface of the hollow fiber membrane, and the bubbles thus formed do not have sufficient force to remove contaminants from the outer surface of the hollow fiber membrane and thus adhere to the hollow fiber membrane. There was a problem that the efficiency is reduced due to the removal of the pollutants.

Accordingly, the present invention has been made in order to solve the problems as described above, so as to maximize the filtration area as well as to maximize the filtration area by embedding the hollow fiber membrane module in the pressure vessel to maximize the removal efficiency of the contaminants attached to the hollow fiber membrane An object of the present invention is to provide a hollow fiber membrane module and a water treatment apparatus using the same.

Hollow fiber membrane module for achieving the above object, the header and the air header formed in each of the center hole and the fastening hole in the body while being respectively mounted on the upper end and the lower end of the outer cylinder; A support tube mounted to the center hole of the header and air header to support the module; A plurality of hollow fiber membrane elements mounted on the fastening holes of the header and the air header through respective head caps and lower caps to filter inflow water; A plurality of injection nozzles respectively mounted to the lower cap and the air header to inject the inflow fluid; And; The cover is formed on the upper side of the header and the header cap formed with a filtrate outlet at the center thereof.

The water treatment apparatus for achieving the above object comprises: a module assembly configured to arrange the hollow fiber membrane modules at regular intervals; A fixing part consisting of an upper fixing plate mounted on the upper end of the module assembly, and a lower fixing plate mounted on the lower end of the module assembly and connected to the upper fixing plate through a plurality of supporting rods, and a lower separating plate mounted on the lower fixing plate. And; While accommodating the module assembly, a lower plate having a fluid inlet and a drain is integrally formed at the lower end thereof, as well as a container portion having an upper dish having a treatment outlet at the upper end thereof.

Hereinafter, an embodiment according to the present invention will be described.

1 is a cross-sectional view showing a water treatment apparatus according to the present invention. 2 is a cross-sectional view of the hollow fiber membrane module according to the present invention, Figure 3 is a cross-sectional view showing a header according to the present invention, Figure 4 is a cross-sectional view showing an air header according to the present invention, Figure 5 is the present invention 6 is a cross-sectional view showing a header cap according to the present invention, Figure 6 is a cross-sectional view showing a hollow fiber membrane element according to the present invention, Figure 7 is a cross-sectional view showing a lower cap according to the present invention, Figure 8 is a top cap according to the present invention As shown in the cross-sectional view, the outer cylinder 113, the header 114, the air header 115, the support tube 111, the hollow fiber membrane element 112, the injection nozzles (118a, 118b) and the header cap 116 Hollow fiber membrane module 110 and; It is added that the hollow fiber membrane module 110 is composed of a water treatment apparatus 100.

First, the water treatment apparatus according to the present invention is configured by regularly arranging a plurality of hollow fiber membrane modules 110 in the container unit 180 as shown in FIG. 1, and the hollow fiber membrane elements 112 in the hollow fiber membrane module 110. It is noted that a plurality of injection nozzles 118a and 118b for injecting the cleaning air toward the air is embedded.

Here, the outer cylinder 113, as shown in Figure 2, as a pillar forming the appearance of the upper hollow fiber membrane module 110, the upper and lower surfaces are open to form an open portion, respectively, the air outlet on the upper side of the circumferential surface While the 132 is formed, a sludge discharge port 131 is formed at the lower side of the circumferential surface thereof to allow inflow of water and discharge of sludge.

At this time, the outer cylinder 113 is preferably formed as a cylindrical columnar body, but is not limited thereto.

And the header 114 is a disk-shaped member attached to the upper side of the outer cylinder 113, as shown in FIG. 3, The center hole 114a by which the upper end part of the said support pipe 111 is mounted in the center part. Is formed, and a plurality of fastening holes 114b on which the head cap 160 is mounted are formed on the circumferential surface of the center hole 114a.

And the air header 115 is a disk-shaped member mounted to the lower side of the outer cylinder 113, as shown in FIG. 4, The center hole 115a by which the lower end part of the said support pipe 111 is mounted in the center part. Is formed, a plurality of fastening holes (115b) is formed on the circumferential surface of the center hole (115a) is the lower cap 150 is mounted.

At this time, the upper surface of the header 114 and the air header 115 is preferably provided with an O-ring groove for preventing leakage.

And, the support tube 111, as shown in Figure 2, as a tubular member that is mounted in the vertical direction in the center of the outer cylinder 113, and performs the support function of the header 114 and the air header 115. The upper end is mounted to the center hole 115a of the air header 115 while the upper end thereof is mounted to the center hole 114a of the header 114.

And, the hollow fiber membrane element 112, as shown in Figure 6, is radially mounted in the inner space of the outer cylinder 113, preferably around the support tube 111, raw water flowing into the outer cylinder 113 The hollow fiber membrane (112a) of the bundle-shaped to filter the, the head cap 160 is inserted into the fastening hole (114a) of the feeder while being mounted on the upper end of the hollow fiber membrane (112a), and the hollow fiber membrane (112a) The lower cap 150 is inserted into the fastening hole 115a of the air header 115 while being mounted at the lower end.

In addition, the hollow fiber membrane element 112, it is obvious that the head cap 160 and the lower cap 150 is molded through an adhesive.

That is, the hollow fiber membrane element 112 inserts a plurality of hollow fiber membranes 112a into the head cap 160 and the lower cap 150, and then fixes the hollow fiber membranes by molding the adhesive into the caps 160 and 150. It is preferable to.

And, as shown in Figure 8, the head cap 160 is a cap-shaped member wrapped around the upper end of the hollow fiber membrane (112a), is inserted into the fastening hole (114b) of the header, not inserted in the bonded state The portion is molded with an adhesive, and a plurality of protrusions 161 and grooves 162 are formed on the inner wall and the outer wall to increase the adhesive force.

The lower cap 150 is a cap-shaped member wrapped around the lower end portion of the hollow fiber membrane 112a as shown in FIG. 7 and is not inserted into the fastening hole 115b of the air header. The part is molded with an adhesive, and a plurality of protrusions 151 and grooves 152 are formed on the inner wall and the outer wall to increase the adhesive force.

Of course, the positions of the protrusions and the grooves formed on the head / lower caps 160 and 150 may be changed to be formed.

And, the injection nozzles (118a, 118b), as shown in Figure 4, is mounted in the vertical direction in the center of the lower cap 150, or in the vertical direction in the air header 115, the operation of the water treatment apparatus When raw water is introduced and the air is cleaned, the cleaning air is sprayed toward the hollow fiber membrane element 112, and the upper part is narrow and the lower part is formed in a wide shape to reduce the differential pressure formed when the fluid passes.

In addition, it is preferable that one hole is formed in the fluid spray nozzles 118a and 118b to serve as a movement path of the inflow fluid and the inflow air to the hollow fiber membrane module.

And, the header cap 116 is a cap-shaped member attached to the upper end of the outer cylinder 113, as shown in Figure 5, the filtrate outlet 130 for discharging the filtered water collected in the center of the upper surface While being formed, a plurality of support pillars 116a are integrally formed on the ceiling surface to prevent separation of the header 114.

On the other hand, as shown in Figure 1, by constructing a module assembly using the hollow fiber membrane module 110 in the pressure vessel 180 can be produced a large-capacity water treatment device 100, in particular the module assembly is a plurality of hollow fiber membrane module ( 110 is disposed and the configuration is the same as above, so a detailed description thereof will be omitted.

That is, the water treatment apparatus 100 includes: a module assembly configured by regularly arranging the hollow fiber membrane modules 110 at regular intervals; A fixing part mounted on the upper end and the lower end of the module assembly to perform a fixing function; It consists of the container part 180 which accommodates the module assembly fixed by this fixing part.

Here, the fixing part is fixed to the upper end and the lower end of the hollow fiber membrane module 110, and regularly arranged, the plate-shaped upper fixing plate 122 in contact with the upper end of the module assembly, the lower contact with the lower end of the module assembly The fixing plate 124, a plurality of support rods 123 for fixing the upper fixing plate 122 and the lower fixing plate 124, and a distribution space 125 fixed to the lower surface of the lower fixing plate 124 for distributing compressed air and raw water It consists of a lower separator 127 to form a).

In addition, the container unit 180 accommodates the module assembly fixed by the fixing unit, and is formed integrally with the body 181 forming the exterior of the housing and the lower end of the body 181 and having a fluid inlet ( 140 and a lower dish 183 formed with a drain 141 and an upper dish 182 covered with an upper end of the body 181 and fixed with a bolt while having a treatment outlet 120 formed therein.

Therefore, when the water treatment apparatus 100 is to be configured, a plurality of hollow fiber membrane modules 110 are installed between the upper fixing plate 122 and the lower fixing plate 124 to which the lower separating plate 127 is connected, and the support rods 123. After fixing by connecting to, and then mounted in the body 181 bonded to the lower dish 183 and fastening the upper dish 182 with a bolt nut.

In this way, the raw water flowing through the fluid inlet 140 flows into the distribution space 125 and is distributed to the respective hollow fiber membrane modules 110 through the respective fluid spray nozzles 118a and 118b. Filtrated water filtered through the collected in the treated water space 121 is discharged through the treated water outlet 120.

Here, the discharge space 126 formed between the lower dish 183 and the lower separator plate 127 of the container portion 180 is generated by the suspended solids that are filtered through the hollow fiber membrane during the air washing, backwashing and operation. The sludge to be stored is temporarily stored, and the sludge which is stored during operation by the discharge space 126 is discharged through the drain 141.

In addition, the vent 142 located on the upper side of the container unit 180 is sprayed through the fluid discharge nozzles (118a, 118b) to the air introduced through the fluid inlet 140 during air cleaning to clean the membrane and then to the top Gathered and discharged.

In addition, the sludge outlet 131 is used as an outlet for discharging contaminants such as sludge generated from the filtered raw water during air cleaning or backwashing, and at the same time, some raw water flows in or out during operation.

In addition, the fluid inlet 140 serves to supply raw water during operation in the hollow fiber membrane module and to supply compressed air during air cleaning.

In addition, the fluid spray nozzle 118a inserted into the hollow in the lower cap 150 injects raw water during operation and compressed air into the hollow fiber membrane element 112 during air backwashing, thereby promoting vortex, thereby increasing the hollow fiber membrane. Vibration and scouring of bubbles are generated in the membrane of the element 112.

In addition, the fluid spray nozzle 118b mounted on the air header 115 injects raw water during operation, and pressurizes compressed air to the outside of the hollow fiber membrane element 112 during air backwashing to promote vortex to generate bubbles. Vibration and scouring of bubbles are generated outside the hollow fiber membrane element 112.

In addition, when the air outlet 132 is operated while the water treatment apparatus is contaminated in the hollow fiber membrane module 110, the air outlet 132 is cleaned to clean the contaminants attached to the module surface by back washing and air cleaning, at this time Drain the introduced air to the outside.

In addition, a distribution space 125 is formed between the lower fixing plate 124 and the lower separation plate 127 so that air and raw water are properly distributed to the hollow fiber membrane module 110, and the distribution space 125 is a lower fixing plate. When the hollow fiber membrane module 110 is combined by forming a space between the 124 and the lower separator plate 127, the fluid spray nozzles 118a and 118b are not blocked.

On the other hand, looking at the filtration process of the water treatment device 100, the raw water introduced through the fluid spray nozzles (118a, 118b) enters the hollow fiber membrane module 110 and is located radially along the outer circumferential surface of the support tube 111 It is filtered by the hollow fiber membrane element 112 forming one hollow fiber membrane module 110.

Subsequently, the raw water introduced into the hollow fiber membrane module 110 is filtered through the surface area of the hollow fiber membrane element 112 that is wider, and this filtered water is collected in the space of the header cap 116 and then the filtrate outlet 130 Gathered to the treatment water space 121 of the upper through the discharged to the outside through the treatment export port (120).

In addition, contaminants such as sludge separated in the raw water filtration process are discharged to the outside through the sludge outlet 131 through air washing and backwashing.

In addition, the air injected from the fluid spray nozzles 118a and 118b stirs the raw water therein, or promotes vortexing, and also generates bubbles to vibrate the hollow fiber membranes, and promotes the scrubbing action by the bubbles to blow the air. Remove contaminants attached to the outer surface of the desert module (112).

On the other hand, when a defect occurs during the manufacturing of the hollow fiber membrane module 110, even before molding the entire hollow fiber membrane module with an adhesive, there was a problem that the conventional hollow fiber membrane module itself must be discarded and newly manufactured, but in the present invention, In the case of using the same hollow fiber membrane module, it is possible to replace only the hollow fiber membrane element 112 in a defective state coupled with the header 116 and the air header 115, and mold the whole with an adhesive to manufacture a large-capacity hollow fiber membrane module. You can do it easily.

In addition, as shown in Figure 9, the hollow fiber membrane module 110 comprises a plurality of air pipes, raw water pipes, discharge lines, etc., in a state in which the built-in outer frame 190 having a rectangular box form another water treatment Naturally, it can be configured as a device.

The present invention as described above provides the following effects.

First, the hollow fiber membrane element 112 can be used to make a large-capacity hollow fiber membrane module cheap and easy.

Second, since the raw water is injected by the fluid spray nozzles 118a and 118b during operation, the vortex is promoted, and the vibration of the membrane is promoted so that the effect of suppressing the attachment of contaminants to the surface of the hollow fiber membrane module can be further improved.

Third, the air spraying vortex 118a, b during the air cleaning to promote the vortex of the air, and promotes the scuffing phenomenon by the air bubble can further improve the removal rate of contaminants attached to the surface area of the hollow fiber membrane module.

Fourth, by placing a plurality of hollow fiber membrane module 110 in one pressure vessel to reduce the installation area, easily configure a large-capacity water treatment device, it was possible to operate at high pressure.

It is to be understood that the invention is not limited to that described above and illustrated in the drawings and that many more modifications and variations are possible within the scope of the following claims.

Claims (11)

delete delete A header (114) and an air header (115) which are respectively mounted on the upper and lower ends of the outer cylinder (113), each of which has a center hole and a fastening hole formed therein; A support tube 111 mounted to the center hole of the header 114 and the air header 115 to support the module; A plurality of heads 160 and lower caps 150 attached to the fastening holes of the header 114 and the air header 115, respectively, and molded at the upper part of the upper header with the adhesive, are used to filter the incoming water. Hollow fiber membrane element 112; A plurality of injection nozzles 118a and 118b mounted to the lower cap 150 and the air header 115 to inject the inflow fluid; A header cap 116 which is covered with an upper side of the header 114 and has a filtrate outlet 130 formed at a center thereof; Hollow fiber membrane module, characterized in that consisting of. The method of claim 3, wherein the head cap 160, Hollow fiber membrane module, characterized in that a plurality of projections (161) or grooves (162) is formed to increase the adhesion to the inner wall and the outer wall. The method of claim 3, wherein the lower cap 150, Hollow fiber membrane module, characterized in that a plurality of protrusions (151) or grooves (152) for increasing the adhesive strength on the inner wall and the outer wall. The method of claim 3, wherein the air header 115, Hollow fiber membrane module, characterized in that a plurality of holes are formed so that a predetermined portion of the lower cap 150 is inserted into the body to be bonded. The method of claim 3, wherein the header 114, Hollow fiber membrane module, characterized in that a plurality of holes are formed so that a predetermined portion of the header cap 160 is inserted into the body to be bonded. A hollow fiber membrane module according to any one of claims 3 to 7; A module assembly configured by arranging a plurality of the hollow fiber membrane modules 110 at a predetermined interval; The upper fixing plate 122 and the lower fixing plate 124 which are respectively in contact with the upper end and the lower end of the module assembly are connected with a plurality of supporting rods 123, and the lower separating plate 127 is mounted on the lower surface of the lower fixing plate 124. One fixing part; A body 181 for receiving the module assembly, a lower plate 183 is formed integrally with the lower end of the body 181, and has a fluid inlet 140 and a drain 141, and the body 181 Covered by the upper end of the container portion 180 consisting of an upper dish 182 having a processing outlet 120; Water treatment device using a hollow fiber membrane module, characterized in that made. The water treatment apparatus using a hollow fiber membrane module according to claim 8, wherein a distribution space (125) for distributing air and raw water is formed between the lower fixing plate (124) and the lower separating plate (127). The water treatment apparatus using a hollow fiber membrane module according to claim 8, wherein a treated water space (121) for collecting filtered water is formed between the header (114) and the header cap (116). The method of claim 8, wherein the discharge space 126 is formed between the lower separator 127 and the lower dish 183 to temporarily store the sludge produced by the suspended solids filtered in the hollow fiber membrane. Water treatment device using a hollow fiber membrane module.

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