KR101867354B1 - Water treatment apparatus - Google Patents

Abstract

The present invention provides a membrane module including a housing, a hollow fiber membrane bundle, and a potting part for bundling the bundle of hollow fiber membranes and fixing the hollow fiber membrane bundle to the inside of the housing; A chamber connected to the membrane module such that raw water supplied to the membrane module and backwash water discharged from the membrane module pass through; And a membrane module accommodated in the chamber, moved to the membrane module by raw water supplied to the membrane module, collided with the hollow fiber membrane bundle and the potting part, and returned to the chamber by the backwash water discharged from the membrane module A water treatment apparatus including an impact bead is provided.

Description

[0001] WATER TREATMENT APPARATUS [0002]

The present invention relates to a water treatment apparatus for producing purified water by filtering raw water.

A water treatment device refers to a device that treats raw water to suit its intended purpose. The water treatment apparatus is divided into a water treatment apparatus and a wastewater treatment apparatus. The water treatment apparatus is intended for drinking water or industrial water, and the wastewater treatment apparatus is for municipal sewage or industrial wastewater.

Such a water treatment system treats raw water to an intended level by utilizing physical, chemical and biological treatment methods such as coagulation, sedimentation, filtration, adsorption, and disinfection. The method used for water treatment depends on the use of the treated water.

The water treatment apparatus includes a pressurized hollow fiber membrane, and the pressurized hollow fiber membrane is used to remove contaminants in water by sieving method. However, when the pressurized hollow fiber membranes continuously remove the contaminants, the filtered contaminants accumulate in the pressurized hollow fiber membranes, resulting in the continuous contamination of the pressurized hollow fiber membranes.

Conventionally, backwash (or backwash) or chemical cleaning has been used to solve the contamination of such a pressurized hollow fiber membrane.

Back wash refers to the operation of passing the fluid in the opposite direction of the filtration process to recover the filtration performance of the contaminated pressurized hollow fiber membrane and discharging the contaminant from the pressurized hollow fiber membrane together with the fluid. To improve the effectiveness of backwashing, a small amount of medicament is added to the fluid, and air is injected with the fluid.

Clean In Place (CIP) refers to the operation of circulating and setting the chemicals repeatedly while passing the chemicals such as hydrochloric acid and sulfuric acid through the filtration process of the pressurized hollow fiber membrane.

The backwashing or chemical cleaning operation can remove accumulated contaminants in the pressurized hollow fiber membrane and also restore the filtration performance of the pressurized hollow fiber membrane. However, there still exist contaminants that can not be removed by backwashing or chemical cleaning operations, and thus there is a limitation in recovering the filtration performance of the pressurized hollow fiber membrane.

It is an object of the present invention to provide a water treatment apparatus capable of removing contaminants of a membrane that is not removed even by backwashing or chemical cleaning operations and capable of improving the degree of recovery of filtration performance of the membrane.

Another object of the present invention is to provide a water treatment apparatus having a structure capable of removing contaminants from the membrane without causing deterioration in the filtration process of the water treatment apparatus.

Another object of the present invention is to provide a water treatment apparatus which is configured to remove accumulated contaminants in the membrane by physical impact.

Another object of the present invention is to provide a water treatment apparatus for removing pollutants accumulated in a membrane by transmission of vibration.

According to another aspect of the present invention, there is provided a water treatment apparatus including a housing, a hollow fiber membrane bundle, and a potting unit for bundling the bundle of hollow fiber membranes and fixing the hollow fiber membrane bundle to the inside of the housing. ; A chamber connected to the membrane module such that raw water supplied to the membrane module and backwash water discharged from the membrane module pass through; And a membrane module accommodated in the chamber, moved to the membrane module by raw water supplied to the membrane module, collided with the hollow fiber membrane bundle and the potting part, and returned to the chamber by the backwash water discharged from the membrane module Collision bead.

According to an embodiment of the present invention, the potting portion includes: a first potting portion coupled to an upper end of the hollow fiber membrane bundle; And a second potting portion coupled to a lower end of the hollow fiber membrane bundle, wherein the impact bead comprises: a first longitudinal impact bead floating on the raw water to impinge on the first potting portion; And a second type impact bead that sinks into the raw water to impinge on the second potting part.

According to another embodiment of the present invention, the surface roughness of the impact bead is determined according to the durability of the hollow fiber membrane bundle.

According to another example of the present invention, the impact bead has a plurality of projections on its surface.

According to another embodiment of the present invention, the water treatment apparatus includes: a filtration step of supplying purified water to the membrane module to generate purified water; A pure washing step of supplying raw water to the chamber to move the impact beads to the membrane module and colliding the impact beads with the hollow fiber membrane bundle and the potting part to remove accumulated contaminants in the membrane module ; And a backwash process in which backwash water flows in the membrane module in a direction opposite to the filtration process to wash the inside of the membrane module.

According to another embodiment of the present invention, the water treatment apparatus includes a screen installed inside the chamber, and the screen is provided with a screen for preventing the impact bead from being discharged to the discharge line by the backwash water Small holes are formed.

According to another embodiment of the present invention, the water treatment apparatus includes:

A raw water supply line connected to the membrane module by bypassing the chamber and forming a flow path for supplying raw water to the membrane module; A first supply line branched from the raw water supply line and connected to the chamber to form a flow path for supplying raw water to the chamber; A second supply line connected to the chamber and the membrane module to form a flow path for supplying raw water passing through the chamber and a collision bead received in the chamber to the membrane module; And a discharge line connected to the chamber to form a flow path for discharging backwash water discharged from the membrane module to the chamber through the second supply line to the outside of the water treatment apparatus.

The water treatment apparatus includes a raw water pump configured to supply raw water to the membrane module or the chamber, and the pump is installed on an upstream side of a branch point where the first supply line branches from the raw water supply line.

The discharge line comprising: a first discharge line connected to the membrane module and the chamber; And a second discharge line extending from the chamber to the outside of the water treatment apparatus, the chamber being doubly connected to the membrane module by the second supply line and the first discharge line.

The second supply line is adapted to join the raw water supply line before being connected to the membrane module, and the discharge line is branched from the first supply line.

The water treatment apparatus includes a raw water supply valve installed in the raw water supply line; A first valve installed in the first supply line; A second valve installed in the second supply line; And a discharge valve installed in the discharge line.

The water treatment apparatus includes: a filtration step of supplying raw water to the membrane module to generate purified water; A pure washing step of supplying raw water to the chamber to move the impact beads to the membrane module and colliding the impact beads with the hollow fiber membrane bundle and the potting part to remove accumulated contaminants in the membrane module ; And a backwashing process of washing the inside of the membrane module by flowing backwash water in a direction opposite to the filtration process inside the membrane module, and the raw water supply line is connected to the raw water supply valve And wherein the first supply line is opened by the first valve in the net cleaning step and the filtration step and the backwashing step are opened by the first valve in the net washing step and the backwashing step, Wherein the first valve is closed by the first valve and the second supply line is opened by the second valve in the net washing process and the back washing process and is closed by the second valve in the filtration process, The discharge line is opened by the discharge valve in the backwash process, It is closed by the discharge valve.

According to another embodiment of the present invention, the water treatment apparatus includes a vibration device installed on an outer circumferential surface of the housing, the vibration device is installed at a height corresponding to the potting part, So as to generate transmitted vibration.

The vibration device includes: a belt formed to surround an outer circumferential surface of the housing; And a vibrator disposed between the housing and the belt, the vibrator being brought into close contact with the outer circumferential surface of the housing by the belt.

The vibrators are provided in plural and are disposed apart from each other along the circumferential direction of the housing.

The belt includes a vibrator receiving groove formed in a portion facing the outer circumferential surface of the housing and adapted to receive the vibrator; And a cable receiving groove formed in a portion facing the outer circumferential surface of the housing to communicate with the vibrator receiving groove and adapted to receive a cable for transmitting electric power to the vibrator.

The belt comprising: a first portion surrounding an outer circumferential surface of the housing; And two second portions extending in parallel from the first portion toward the outside of the housing and having screw holes corresponding to each other, and the vibrating device further comprises a second vibrating portion which vibrates to a degree that the vibrator is in close contact with the outer peripheral surface of the housing And a fastening member fastened to the screw hole to adjust the screw hole.

According to the present invention, the collision beads received in the chamber move to the membrane module along the raw water flowing into the membrane module through the chamber, collide with the bundle of hollow fiber membranes of the membrane module and the potting part, Contaminants that can not be removed by chemical cleaning alone can be removed.

In addition, according to the present invention, the structure for removing contaminants from the membrane module does not adversely affect the filtration performance of the water treatment apparatus. This is because the flow path used in the filtration process is separated from the flow path used in the pure cleaning process, so that there is no element that causes resistance to the flow rate of the filtration process. Also, since the collision bead is introduced into the membrane module only in the pure washing process and then returned to the chamber by the backwash water discharged from the membrane module, no resistance is generated by the collision bead in the filtration process. Finally, since the collision bead is accommodated in the chamber and moves to the membrane module only when the pollutant removal is required, damage of the membrane module due to the collision bead can be prevented.

In addition, since the present invention has a structure capable of applying an external force for removing contaminants from the inside and the outside of the membrane using the vibration device as well as the collision bead, synergistic effects can be obtained by the two configurations.

1 is a perspective view showing the appearance of a membrane module according to the present invention.
2 is a perspective view showing the internal structure of a membrane module according to the present invention.
FIG. 3 is a cross-sectional view showing the accumulation of contaminants in the membrane module according to the present invention. FIG.
4A to 4C are conceptual diagrams of a water treatment apparatus according to an embodiment of the present invention.
5A to 5C are conceptual diagrams of a water treatment apparatus according to another embodiment of the present invention.
6 is a front view showing a membrane module and a vibration device according to the present invention.
7 is a perspective view of a vibrating device according to the present invention.

Hereinafter, a water treatment apparatus according to the present invention will be described in detail with reference to the drawings. In the present specification, the same reference numerals are given to the same components in different embodiments, and the description thereof is replaced with the first explanation. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, although other elements may also be present in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between.

1 is a perspective view showing the appearance of a membrane module 10 according to the present invention.

The membrane module 10 comprises a housing 11 and the housing 11 forms the appearance of the membrane module 10.

The housing 11 includes a body 11a and caps 11b and 11c. The body 11a has a hollow cylindrical shape and the caps 11b and 11c are respectively coupled to the upper and lower ends of the body 11a.

The membrane module 10 includes a plurality of nozzles 12a and 12b. The nozzles 12a and 12b are connected to lines (piping, pipes, etc.) for introducing raw water, which is a subject of water treatment, into the interior of the membrane module 10 or for discharging the water purified water to the outside of the membrane module 10. The nozzles 12a and 12b may be formed on the body 11a or the caps 11b and 11c and may be formed on the outer circumferential surface or the upper or lower end of the housing 11.

2 is a perspective view showing the internal structure of a membrane module according to the present invention.

The membrane module includes a hollow fiber membrane bundle 13 and potting sections 14a and 14b.

The hollow fiber membrane bundle 13 is composed of a plurality of hollow fiber membranes. Fine pores are formed in each hollow fiber membrane. The raw water passes through the pores, and the contaminants contained in the raw water are filtered by a sieving method which is caught by the pores.

The potting portions 14a and 14b bind the hollow fiber membrane bundles 13 and are fixed to the inside of the housing described in Fig. The potting portions 14a and 14b may be formed at both ends of the hollow fiber membrane bundle 13, respectively. The first port 14a is coupled to the upper end of the hollow fiber membrane bundle 13 and the second port 14b is connected to the lower end of the hollow fiber membrane bundle 13 to separate the two ports 14a and 14b. 2 port portion 14b.

The raw water flowing into the membrane module can be discharged only through the hollow fiber membrane bundle 13 bound to the potting parts 14a and 14b so that the potting parts 14a and 14b form the boundary of the flow path.

FIG. 3 is a cross-sectional view showing the contaminant accumulation state of the membrane module 10 according to the present invention.

When the raw water continuously flows into the membrane module 10 and the raw water is filtered, the contaminants accumulate inside the membrane module 10. The inside of the membrane module 10 optionally corresponds to an intermediate portion A corresponding to the hollow fiber membrane bundle 13, an upper portion B corresponding to the first potting portion 14a, and a second potting portion 14b corresponding to the first potting portion 14a. (C).

When the raw water or the backwash water flows into the membrane module 10, the raw water is moved by the backwash water in the hollow fiber membrane bundle 13, and the fluidity of the hollow fiber membrane bundle 13 is ensured. Therefore, if the backwashing process is performed by flowing purified water in the reverse direction of the filtration process in the membrane module 10 for backwashing, the contaminant a of the intermediate portion A can be removed.

 However, unlike the hollow fiber membrane bundle 13, the potting portions 14a and 14b are fixed to the inside of the membrane module 10. Therefore, even if the raw water or the backwash water flows into the interior of the membrane module 10, the potting portions 14a and 14b move only in a limited manner even if they do not move or even move, and the fluidity of the potting portions 14a and 14b It is difficult to secure. Therefore, even if the backwashing process is performed, the contaminants b and c of the upper portion B and the lower portion C corresponding to the first potting portion 14a are hardly removed.

As the operating time of the membrane module 10 accumulates, the contaminants accumulated in the membrane module 10 continue to accumulate. Even if the backwashing process is carried out, the contaminants to be removed from the membrane module 10 are mostly the contaminant (a) of the intermediate portion (A). As a result, if the operation time of the membrane module 10 is accumulated, even if the backwashing process is periodically performed, the accumulation amount of the contaminants b and c in the upper part B and the lower part C, respectively, .

In particular, in the case of the membrane module 10 shown in FIG. 3, the raw water is introduced through the lower nozzle 12d and the purified water is discharged through the upper nozzle 12b or 12d. The amount of the contaminant (c) accumulated in the upper part (B) is relatively larger than the amount of the contaminant (a) (b) in the middle part (A)

Hereinafter, the water treatment apparatus 100 of the present invention for solving the problem of the pollutant accumulated in the potting unit will be described.

4A to 4C are conceptual diagrams of a water treatment apparatus 100 according to an embodiment of the present invention. 4A shows the filtration process of the water treatment apparatus 100, FIG. 4B shows the net cleaning process of the water treatment apparatus 100, and FIG. 4C shows the back wash process of the water treatment apparatus 100.

First, the configuration of the water treatment apparatus 100 will be described, and then the operation of the water treatment apparatus 100 will be described.

1-1. The configuration of the water treatment apparatus 100

The water treatment apparatus 100 includes a membrane module 110, a chamber 140 and an impact bead 150, and a plurality of lines (pipes or pipes) are connected to the membrane module 110. The description of the membrane module 110 will be omitted from the description of FIGS. 1 to 3 above.

The chamber 140 is connected to the membrane module 110 such that raw water supplied to the membrane module 110 and backwash water discharged from the membrane module 110 pass therethrough. 4A and 4B, the chamber 140 and the membrane module 110 are connected to each other by a second supply line 141b to be described later.

The chamber 140 is for receiving the collision bead 150. Accordingly, the chamber 140 is formed to receive the collision bead 150, and the specific shape of the chamber 140 in the present invention is not particularly limited.

The collision bead 150 is accommodated in the chamber 140. The collision bead 150 may enter and exit the interior of the chamber 140 through lines connected to the chamber 140. Since the chamber 140 and the membrane module 110 are connected to each other by the second supply line 141b, the impact bead 150 is moved to the membrane module 110 by the raw water supplied to the membrane module 110 It is possible. Similarly, the collision bead 150 can return to the chamber 140 by the backwash water discharged from the membrane module 110.

The collision beads 150 may be of different kinds. Since the potting portions 14a and 14b include the first potting portion 14a and the second potting portion 14b, in order to desorb the contaminants from the respective potting portions 14a and 14b, The impact bead 150 may be configured differently depending on the specific gravity. The first type impact bead may be configured to float the raw water so as to be collided with the first potting portion 14a and the second type impact bead may be configured to sink to the raw water to collide with the second potting portion 14b.

Also, the surface roughness of the impact bead 150 and the presence or absence of the projection can be determined according to the durability of the hollow fiber membrane bundle 13 (see FIGS. 2 and 3). For example, if the hollow fiber membrane bundle 13 (see FIG. 3) has a high durability, the impact bead 150 may have multiple projections with a rougher surface. In contrast, if the hollow fiber membrane bundle has weak durability, the impact bead 150 may have a smooth surface, and protrusions may not be formed on the impact bead 150. The projections maximize the surface roughness.

A screen 160 is installed inside the chamber 140. The screen 160 is formed with holes that are smaller than the impact bead 150 to prevent the impact bead 150 from being discharged by the backwash water to the discharge line 170 described below.

The raw water supply line 121 is connected to the membrane module 110 to form a flow path for supplying raw water to the membrane module 110. The raw water supply line 121 bypasses the chamber 140. The raw water supply line 121 is provided with a raw water supply valve 122 for opening and closing the raw water supply line 121.

The first supply line 141a is connected to the chamber 140 to form a flow path for supplying raw water to the chamber 140. [ The first supply line 141a may be branched from the raw water supply line 121 and connected to the chamber 140 as shown in Figs. 4A to 4C. 4A to 4C show a branching point 191. In FIG. The first supply line 141a is provided with a first valve 142a for opening and closing the first supply line 141a.

The second supply line 141b is connected to the chamber 140 and the membrane module 110. The second supply line 141b forms a flow path for supplying the raw water that has passed through the chamber 140 and the collision beads 150 accommodated in the chamber 140 to the membrane module 110. The raw water may be supplied to the membrane module 110 through the first supply line 141a, the chamber 140, and the second supply line 141b. The second supply line 141b may be joined to the raw water supply line 121 before being connected to the membrane module 110 as shown in Figs. 4A to 4C. 4A to 4C show a confluence point 192. The second supply line 141b is provided with a second valve 142b for opening and closing the second supply line 141b.

The discharge line 170 is connected to the chamber 140. The channel for discharging the backwash water discharged from the membrane module 110 to the chamber 140 through the second supply line 141b to the outside of the water treatment apparatus 100 is formed. The discharge line 170 may be branched from the first supply line 141a as shown in Figs. 4A to 4C. 4A to 4C show a turning point 193. The discharge line 170 is provided with a discharge valve 171 for opening and closing the discharge line 170.

The raw water supply pump 120 is configured to supply raw water to the membrane module 110 or the chamber 140. The raw water supply pump 120 is installed on the upstream side of the branch point 191 at which the first supply line 141a branches from the raw water supply line 121. [ Therefore, when the raw water supply valve 122 is opened and the first valve 142a is closed, the raw water is supplied to the membrane module 110 by the raw water supply pump 120. [ On the contrary, when the raw water supply valve 122 is closed and the first valve 142a is opened, the raw water is supplied to the chamber 140 by the raw water supply pump 120.

The purified water tank 125 is formed to receive the purified water in the membrane module 110. In the present invention, the concrete shape of the purified water tank 125 is not particularly limited.

The purified water tank 125 and the membrane module 110 may be doubly connected by the purified water line 126 and the backwashing line 130. The integral line 126 forms a flow path for supplying purified water filtered by the membrane module 110 to the purified water tank 125. The backwash line 130 forms a flow path for supplying purified water (called backwash water in this specification) to the membrane module 110 for backwashing in the purified water tank 125. A backwash pump (131) is installed in the backwash line (130). In the backwash process, the backwash water is supplied from the purified water tank 125 to the membrane module 110 by the backwash pump 131.

A discharge line 127 is connected to the purified water tank 125. The discharge line 127 extends to the outside of the water treatment apparatus 100 and forms a flow path for supplying purified water to the outside of the water treatment apparatus 100.

1-2. The operation of the water treatment apparatus 100

(1) Filtration process

First, the filtration process will be described with reference to FIG.

The filtration process refers to a process in which raw water is supplied to the membrane module 110 to generate purified water.

In the filtration process, the raw water supply line 121 is opened by the raw water supply valve 122, and the first supply line 141a, the second supply line 141b and the discharge line 170 are connected to the first valve 142a, The second valve 142b, and the discharge valve 171, respectively. Therefore, when the raw water supply pump 120 operates, raw water is supplied to the membrane module 110 through the raw water supply line 121. The first supply line 141a, the second supply line 141b and the discharge line 170 do not flow theoretically.

The membrane module 110 filters the supplied raw water by sieving. The raw water is filtered to be purified by the membrane module 110, and the purified water is supplied to the purified water tank 125 through the purified water line 126. The purified water stored in the purified water tank 125 is supplied to the outside through the discharge line 127 as needed.

If the filtration process time is accumulated, contaminants accumulate in the membrane module 110, and the contaminants may be removed through the net cleaning or back washing described below.

(2) The net cleaning process

Next, the net cleaning process will be described with reference to FIG. 4B.

In the net cleaning process, raw water is supplied to the chamber 140 to move the collision bead 150 to the membrane module 110, and the collision bead 150 is collided with the bundle of hollow fiber membranes inside the membrane module 110 and the potting part. Thereby removing the accumulated contaminants in the interior of the membrane module 110. The name of net cleaning was named for the same direction of flow of water as the filtration process or reverse flow direction to the backwash process.

In the net cleaning process, the raw water supply line 121 is closed by the raw water supply valve 122. And the first supply line 141a and the second supply line 141b are opened by the first valve 142a and the second valve 142b, respectively. The discharge line 170 is closed by the discharge valve 171. Therefore, when the raw water supply pump 120 is operated, raw water is supplied to the chamber 140 through the first supply line 141a and then supplied to the membrane module 110 through the second supply line 141b. The collision bead 150 received in the chamber 140 is moved to the membrane module 110 by being swept by the raw water.

The impact beads 150 moved to the membrane module 110 through the second supply line 141b collide against the bundle of hollow fiber membranes and the potting portion due to the flow of raw water passing through the membrane module 110. [ As the impact beads 150 collide with the hollow fiber membrane bundle and the potting part, the accumulated contaminants in the hollow fiber membrane bundle and the potting part are separated from the hollow fiber membrane bundle and the potting part.

Particularly, in the pure cleaning mode, it is possible to remove the contaminants in the potting portion that can not be removed in the back washing mode described later.

(3) Backwash process

Finally, the backwashing process will be described with reference to FIG.

The backwashing process is a process of washing the inside of the membrane module 110 by flowing backwash water in the opposite direction of the filtration process to the inside of the membrane module 110.

In the backwash process, the raw water supply line 121 and the first supply line 141a are closed by the raw water supply valve 122 and the first valve 142a, respectively. And the second supply line 141b and the discharge line 170 are opened by the second valve 142b and the discharge valve 171, respectively. The backwash pump 131 installed in the backwashing line 130 operates to supply the purified water stored in the purified water tank 125 to the membrane module 110.

The backwash water supplied to the membrane module 110 passes through the membrane module 110 and is discharged to the second supply line 141b together with contaminants. At this time, contaminants desorbed from the bundle of hollow fiber membranes and the potting portion in the net cleaning process, and the collision beads 150 that have been moved from the chamber 140 to the membrane module 110 in the net cleaning process are also discharged to the second supply line 141b do. The second supply line 141b is connected to the chamber 140 so that the impact bead 150 returns to the chamber 140 and the backwash water and contaminants are discharged through the discharge line 170 to the outside of the water treatment apparatus 100 .

The chamber 140 is provided with a screen 160 having holes smaller than the impact bead 150 so that the impact bead 150 is not discharged to the discharge line 170 but only the backwash water and contaminants And discharged to the discharge line 170.

The net washing step and the backwashing step need not necessarily be performed sequentially but only the backwashing step may be performed after the filtration step. However, after the pure washing process, the collision bead 150 is left in the membrane module 110, and the collision bead 150 can form a resistance to the raw water passing through the membrane module 110 in the filtration process. Accordingly, it is preferable to return the collision bead 150 to the chamber 140 through the backwash process after the net cleaning process.

If the net cleaning process and the back washing process are sequentially performed in this manner, the impact beads 150 may not remain in the membrane module 110, so that the performance of the filtration process may not be deteriorated, It is possible to prevent the bundle of hollow fiber membranes from being damaged.

5A to 5C are conceptual diagrams of a water treatment apparatus 200 according to another embodiment of the present invention. FIG. 5A shows a filtering process of the water treatment apparatus 200, FIG. 5B shows a net cleaning process of the water treatment apparatus 200, and FIG. 5C shows a back washing process of the water treatment apparatus 200.

2-1. The configuration of the water treatment apparatus 200

The water treatment apparatus 200 shown in Figs. 5A to 5C is essentially the same as the water treatment apparatus 200 shown in Figs. 4A to 4C except for the flow path configuration. Therefore, the overlapping explanation is replaced with the above explanation.

The water treatment apparatus 200 includes a membrane module 210, a chamber 240 and an impact bead 250, and a plurality of lines (pipes or pipes) are connected to the membrane module 210. The chamber 240 is connected to the membrane module 210 to allow the raw water supplied to the membrane module 210 and the backwash water discharged from the membrane module 210 to pass therethrough. 5A-5B, the chamber 240 is connected to the membrane module 210 in a duplex manner by a supply line and a discharge line, which will be described later. More specifically, the chamber 240 is doubly connected to the membrane module 210 by a second supply line 241b and a first discharge line 270a, which will be described later.

The discharge lines 270a and 270b include a first discharge line 270a and a second discharge line 270b.

The first discharge line 270a is connected to the membrane module 210 and the chamber 240. The first discharge line 270a forms a flow path for supplying the backwash water discharged from the membrane module 210 to the chamber 240. The second discharge line 270b extends from the chamber 240 to the outside of the water treatment apparatus 200. The second discharge line 270b forms a flow path for discharging the backwash water discharged from the chamber 240 to the outside of the water treatment apparatus 200. The second discharge line 270b is provided with a discharge valve 271 for opening and closing the second discharge line 270b.

2-2. The operation of the water treatment apparatus 200

(2) Filtration process

First, the filtration process will be described with reference to FIG.

The filtration process refers to a process of generating purified water by supplying raw water to the membrane module 210.

The raw water supply line 221 is opened by the raw water supply valve 222 in the filtration process and the first supply line 241a, the second supply line 241b and the second discharge line 270b are opened by the first valve 242a, the second valve 242b, and the discharge valve 271, respectively. Therefore, when the raw water supply pump 220 is operated, raw water is supplied to the membrane module 210 through the raw water supply line 221. The first supply line 241a, the second supply line 241b, the first discharge line 270a and the second discharge line 270b do not flow theoretically.

The membrane module 210 filters the supplied raw water by sieving. The raw water is filtered to be purified by the membrane module 210, and the purified water is supplied to the purified water tank 225 through the purified water line 226. The purified water stored in the purified water tank 225 is supplied to the outside through the discharge line 227 as necessary.

(2) The net cleaning process

Next, the net cleaning process will be described with reference to FIG. 5B.

In the net cleaning process, raw water is supplied to the chamber 240 to move the collision beads 250 to the membrane module 210, and the collision beads 250 collide with the bundle of hollow fiber membranes inside the membrane module 210 and the potting part Thereby removing the accumulated contaminants in the interior of the membrane module 210. The name of net cleaning was named as reverse to the flow direction of water during backwash.

In the net cleaning process, the raw water supply line 221 is closed by the raw water supply valve 222. And the first supply line 241a and the second supply line 241b are opened by the first valve 242a and the second valve 242b, respectively. The second discharge line 270a is closed by the discharge valve 271 and the first discharge line 270a is connected to the second discharge line 270b through the chamber 240, Lt; / RTI > When the raw water supply pump 220 is operated, the raw water is supplied to the chamber 240 through the first supply line 241a and then supplied to the membrane module 210 through the second supply line 241b. The impact beads 250 received in the chamber 240 are moved to the membrane module 210 while being swept by the raw water.

The impact beads 250 moved to the membrane module 210 through the second supply line 241b collide against the bundle of hollow fiber membranes and the potting portion by the flow of the raw water passing through the membrane module 210. [ As the impact beads 250 collide with the bundle of hollow fiber membranes and the potting portion, the contaminants accumulated in the hollow fiber membrane bundle and the potting portion are separated from the hollow fiber membrane bundle and the potting portion.

Particularly, in the pure cleaning mode, it is possible to remove the contaminants in the potting portion that can not be removed in the back washing mode described later.

(3) Backwash process

Finally, the backwash process will be described with reference to FIG.

The backwashing process is a process of washing the inside of the membrane module 210 by flowing backwash water in a direction opposite to the filtration process inside the membrane module 210.

In the backwash process, the raw water supply line 221, the first supply line 241a and the second supply line 241b are connected by a raw water supply valve 222, a first valve 242a and a second valve 242b Lt; / RTI > The second discharge line 270b is opened by the discharge valve 271. Since the first discharge line 270a is connected to the second discharge line 270b through the chamber 240, the first discharge line 270a is also opened. The backwash pump 231 installed in the backwashing line 230 operates to supply the purified water (backwash water) stored in the purified water tank 225 to the membrane module 210.

The backwash water supplied to the membrane module 210 passes through the membrane module 210 and is discharged to the first discharge line 270a together with the contaminants. At this time, contaminants desorbed from the bundle of hollow fiber membranes and the potting portion in the net cleaning process, and the collision beads 250 that have been moved from the chamber 240 to the membrane module 210 in the net cleaning process are also discharged to the first discharge line 270a do. The first discharge line 270a is connected to the chamber 240 so that the impact bead 250 returns to the chamber 240 and the backwash water and pollutants continue to flow through the second discharge line 270b to the water treatment apparatus 200, respectively.

The chamber 240 is provided with the screen 260 having holes smaller than the impact bead 250 so that the impact bead 250 is not discharged to the second discharge line 270b but only the backwash water and the contaminant And is discharged to the second discharge line 270b.

The net washing step and the backwashing step need not necessarily be performed sequentially but only the backwashing step may be performed after the filtration step. However, after the net cleaning process, the impact beads 250 remain on the membrane module 210, and the impact beads 250 can form a resistance to the raw water passing through the membrane module 210 in the filtration process. Thus, after the net cleaning process, it is desirable to return the impingement bead 250 to the chamber 240 through a backwash process.

If the net cleaning process and the back washing process are sequentially performed in this way, the collision bead 250 may not be left in the membrane module 210, so that the performance of the filtration process may not be deteriorated, It is possible to prevent the bundle of hollow fiber membranes from being damaged.

6 is a front view showing the membrane module 310 and the vibration device 380 according to the present invention.

The water treatment apparatus of the present invention may include a vibration device 380 coupled to the membrane module 310. The vibration device 380 is installed on the outer circumferential surface of the housing 311. The vibrating device 380 is for removing contaminants that are not removed by backwashing as well as impact beads.

As shown in Fig. 6, the vibration device 380 is installed at a height corresponding to the potting portion. The potting portion may be located at the boundary between the body 311a and the caps 311b and 311c and the vibrating device 380 may be located at the boundary between the body 311a and the caps 311b and 311c.

The vibrating device 380 includes belts 384a and 384b that are configured to enclose the housing 311. As the fastening members 385a and 385b are fastened to the belts 384a and 384b, the vibration device can be coupled to the membrane module 310. [ The detailed structure of the vibration device 380 will be described later with reference to Fig.

The vibrating device 380 is configured to generate vibration transmitted to the potting part through the housing 311. [ The vibration generated in the vibration device 380 is transmitted to the potting part through the housing 311, and the contaminants accumulated in the potting part are removed from the potting part. The contaminants desorbed from the potting portion can be discharged from the membrane module 310 by backwashing.

According to the present invention, the collision beads collide with the hollow fiber membrane bundle inside the membrane module 310, and the vibration device 380 vibrates outside the membrane module. Accordingly, external force is applied to the inside and the outside of the membrane module 310, so that contaminants accumulated in the potting part can be removed. Therefore, the collision bead and the vibration device 380 of the present invention generate a synergy effect, thereby effectively removing contaminants accumulated in the potting part.

The vibrating device 380 can also be used in backwashing or chemical cleaning processes as well as in the net cleaning process.

Reference numerals 321a and 312b, which are not described in Fig. 6, are nozzles.

7 is a perspective view of a vibration device 380 according to the present invention.

Belt 384 includes a first portion 384 'and a second portion 383 ".

The first portion 384 'surrounds the outer peripheral surface of the housing 311 (see FIG. 6). The first portion 384 'has a shape corresponding to the outer circumferential surface of the housing. For example, if the housing has a cylindrical shape, the first portion 384 'may also be formed in a circular shape.

The two second portions 384 "extend side by side from the first portion 384 ' towards the outside of the housing. The two second portions 384" The two second portions 384 "also have screw holes 386 corresponding to one another.

The belt includes a vibrator receiving groove 389a and a cable receiving groove 389b.

The vibrator receiving groove 389a is formed at a portion facing the outer circumferential surface of the housing. For example, as shown in FIG. 7, the vibrator receiving groove 389a may be formed on the inner surface of the first portion 384 '. The oscillator receiving groove 389a is recessed into the first portion 384 'to accommodate the oscillator 388. The vibrator receiving groove 389a is formed to have a size corresponding to the vibrator 388, and the vibrator 388 is inserted into the vibrator receiving groove 389a.

The cable receiving groove 389b is also formed in a portion facing the outer circumferential surface of the housing. Like the vibrator receiving groove 389a, the cable receiving groove 389b can also be formed on the inner surface of the first portion 384 '. The cable receiving groove 389b is recessed inside the first portion 384 'to receive a cable that transmits power to the vibrator 388. The cable receiving groove 389b may be connected to the vibrator receiving groove 389a to form one groove with the vibrator receiving groove 389a.

The vibrator 388 is disposed between the housing and the belt. The vibrator 388 is brought into close contact with the outer circumferential surface of the housing by a belt and is caused to generate vibration to be transmitted to the potting portion through the housing. The vibrators 388 are provided in plural and can be disposed apart from each other along the circumferential direction of the housing. Vibrations can be uniformly transmitted to the respective regions of the potting portion by the plurality of vibrators 388 arranged at uniform intervals. If the vibration is concentrated on only a part of the potting part, the pollutant may be desorbed only in the area, and may not be desorbed in the remaining area. However, such a phenomenon can be prevented if a plurality of vibrators 388 are arranged at a uniform interval as shown in Fig.

A fastening member 385 (see FIG. 6) is fastened to the screw hole 386. The fastening member adjusts the degree to which the vibrator 388 is brought into close contact with the outer peripheral surface of the housing. When the fastening member is fastened to the screw hole 386 to keep the two second portions 384 "very close to each other, the first portion 384 'is closer to the outer circumferential surface of the housing and accordingly the first portion 384' The degree of close contact between the vibrator 388 and the vibrator 388 can be determined by the fastening member.

The water treatment apparatus described above is not limited to the configuration and the method of the embodiments described above, but the embodiments may be configured by selectively combining all or a part of each embodiment so that various modifications can be made.

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Claims (17)

delete delete delete delete delete delete A membrane module comprising: a housing; a hollow fiber membrane bundle; and a potting portion for bundling the bundle of hollow fiber membranes and fixing the hollow fiber membrane bundle to the inside of the housing;
A chamber connected to the membrane module such that raw water supplied to the membrane module and backwash water discharged from the membrane module pass through; And
The membrane module is housed in the chamber and is moved to the membrane module by the raw water supplied to the membrane module, collides with the hollow fiber membrane bundle and the potting part, and is returned to the chamber by the backwash water discharged from the membrane module. Including beads,
A raw water supply line connected to the membrane module by bypassing the chamber and forming a flow path for supplying raw water to the membrane module;
A first supply line branched from the raw water supply line and connected to the chamber to form a flow path for supplying raw water to the chamber;
A second supply line connected to the chamber and the membrane module to form a flow path for supplying raw water passing through the chamber and a collision bead received in the chamber to the membrane module; And
And a discharge line connected to the chamber to form a flow path for discharging backwash water discharged from the membrane module to the chamber through the second supply line. 8. The method of claim 7,
Wherein the water treatment apparatus includes a raw water pump configured to supply raw water to the membrane module or the chamber,
Wherein the pump is installed on an upstream side of a branch point where the first supply line branches from the raw water supply line. 8. The method of claim 7,
The discharge line
A first discharge line connected to the membrane module and the chamber; And
And a second discharge line extending from the chamber to the outside of the water treatment apparatus,
Wherein the chamber is doubly connected to the membrane module by the second supply line and the first discharge line. 8. The method of claim 7,
Said second supply line being adapted to join said raw water supply line before being connected to said membrane module,
Wherein the discharge line is branched from the first supply line. 8. The method of claim 7,
The water treatment apparatus includes:
A raw water supply valve installed in the raw water supply line;
A first valve installed in the first supply line;
A second valve installed in the second supply line; And
And a discharge valve installed in the discharge line. 12. The method of claim 11,
The water treatment apparatus includes:
A filtration step of supplying raw water to the membrane module to generate purified water;
A pure washing step of supplying raw water to the chamber to move the impact beads to the membrane module and colliding the impact beads with the hollow fiber membrane bundle and the potting part to remove accumulated contaminants in the membrane module ; And
Washing the inside of the membrane module by flowing backwash water into the membrane module in a direction opposite to the filtration step,
The raw water supply line is opened by the raw water supply valve in the filtration process and is closed by the raw water supply valve in the net cleaning process and the backwash process,
Wherein the first supply line is opened by the first valve in the net cleaning process and closed by the first valve in the filtration process and the backwash process,
Wherein the second supply line is opened by the second valve in the net cleaning step and the backwashing process and is closed by the second valve in the filtration step,
Wherein the discharge line is opened by the discharge valve in the backwash process and is closed by the discharge valve in the filtration process and the net wash process. 8. The method of claim 7,
The water treatment apparatus further includes a vibration device installed on an outer circumferential surface of the housing,
The vibrating device is installed at a height corresponding to the potting part and generates vibrations to be transmitted to the potting part through the housing,
The vibrating device includes:
A belt formed to surround an outer peripheral surface of the housing; And
And a vibrator disposed between the housing and the belt and closely contacting the outer circumferential surface of the housing by the belt. delete 14. The method of claim 13,
Wherein the plurality of vibrators are arranged in a circumferential direction of the housing so as to be spaced apart from each other. 14. The method of claim 13,
The belt
A resonator receiving groove formed in a portion of the housing facing the outer circumferential surface thereof and adapted to receive the vibrator; And
And a cable receiving groove formed in a portion facing the outer circumferential surface of the housing and connected to the vibrator receiving groove to receive a cable for transmitting electric power to the vibrator. 14. The method of claim 13,
The belt
A first portion surrounding an outer circumferential surface of the housing; And
And two second portions extending parallel to the outside of the housing from the first portion and having screw holes corresponding to each other,
The vibrating device includes:
And a fastening member fastened to the screw hole to adjust the degree to which the vibrator is brought into close contact with the outer circumferential surface of the housing.

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