KR102505035B1 - Apparatus for purifying water and method for purifying water using the same - Google Patents

Abstract

The water treatment device of the present invention includes a frame having a hole into which both ends of the guide bar can be fastened, a guide bar inserted into the hole and guiding coupling of the hollow fiber membrane module, and a hollow fiber membrane module slidably coupled to the guide bar, , The hollow fiber membrane module includes an upper header in which a plurality of guide bar couplers are formed to adjust the height of the hollow fiber membrane module.

Description

Water treatment device and water treatment method using the same

The present invention relates to a water treatment device and a water treatment method using the same.

With industrial development and population growth, interest in efficient water use and treatment technology is increasing. Recently, the application of membrane technology is gradually increasing in order to secure the stability of water quality in water treatment, wastewater treatment, seawater desalination, and the like. Among membrane technologies, in particular, hollow fiber membranes have a high membrane area per unit volume, can be automatically controlled, and are easy to clean, so many studies are being conducted.

In general, physical and chemical treatment is performed to control the contamination of the hollow fiber membrane, and this causes a problem in that the life of the hollow fiber membrane is shortened. Therefore, it is important for the hollow fiber membranes to have fluidity for efficient membrane cleaning, and methods for controlling the slack of the hollow fiber membranes by adjusting the spacing between headers are being applied.

However, the length of the hollow fiber membrane may gradually shrink over time, and the extent of the hollow fiber membrane may vary depending on the environment in which the hollow fiber membrane is applied, and this may vary even within a single water treatment device.

In general, since a water treatment device has a structure in which the slack of hollow fiber membranes is controlled by the entire cassette (unit), it is impossible to maintain appropriate slack for each hollow fiber membrane module.

On the other hand, the differential pressure at the upper part (eg, near the upper header) of the hollow fiber membrane module is higher than that at the lower part, so contamination is concentrated and thus the cleaning efficiency is low.

Therefore, there is a need for a water treatment device capable of maintaining appropriate slack for each hollow fiber membrane module and effectively preventing contamination of the upper portion of the hollow fiber membrane module.

Prior art related to this is disclosed in US Patent No. 8,038,882.

An object of the present invention is to provide a water treatment device capable of maintaining and controlling appropriate slack for each hollow fiber membrane module, preventing membrane damage due to membrane shrinkage, and improving physical cleaning efficiency, and a water treatment method using the same it is for

The above and other objects of the present invention can all be achieved by the present invention described below.

One aspect of the present invention relates to a water treatment device.

According to one embodiment, the water treatment device includes a frame having holes into which both ends of the guide bar can be fastened, a guide bar inserted into the hole and guiding coupling of the hollow fiber membrane module, and a hollow fiber membrane that is slidably coupled to the guide bar. module, and the hollow fiber membrane module includes an upper header on which a plurality of guide bar couplers are formed so as to adjust the height of the hollow fiber membrane module.

The hollow fiber membrane module includes a hollow fiber membrane sheet in which a plurality of hollow fiber membranes are stacked in a sheet shape, an upper header extending perpendicularly to the longitudinal direction of the hollow fiber membranes and disposed above the hollow fiber membrane sheet, and a lower portion of the hollow fiber membrane sheet. and a lower header for collecting treated water filtered by the hollow fiber membrane.

The upper header accommodates a plurality of hollow fiber membrane sheets, the first hollow fiber membrane sheet is spaced apart from the neighboring second hollow fiber membrane sheet in the thickness direction, and is formed in the longitudinal direction of the guide bar and faces each other. A first vertical wall portion and a second horizontal wall portion are connected to both ends of the first horizontal wall portion and the second horizontal wall portion and the first vertical wall portion and the second horizontal wall portion are formed with a plurality of guide bar couplers so as to adjust the height of the hollow fiber membrane module. A vertical wall portion is included, and the hollow fiber membrane module is slidably engaged with the guide bar through the guide bar coupler.

An upper portion of the upper header may be open.

In the water treatment device, during aeration, the first hollow fiber membrane sheet and the second hollow fiber membrane sheet may independently freely move in a thickness direction.

The first horizontal wall portion and the second horizontal wall portion may include a pin coupling portion, and the hollow fiber membrane sheet may be fixed to the upper header by a pin penetrating the pin coupling portion and the hollow fiber membrane sheet.

The frame may be formed with a plurality of holes to adjust the height of the guide bar.

A distance (HD) between the first and second horizontal wall portions may be 1.1 to 2 times the thickness (MD) of the hollow fiber membrane sheet.

A distance between the plurality of guide bar couplers may be 3 mm to 10 mm.

In the frame, an interval between the plurality of holes may be 3 mm to 10 mm.

Another aspect of the present invention, a water treatment method, may be a method of water treatment using the above water treatment device.

The present invention has the effect of providing a water treatment device and a water treatment method using the same that can prevent membrane damage due to membrane shrinkage and improve physical cleaning efficiency by maintaining and adjusting appropriate slack for each hollow fiber membrane module. have

1 is a simplified view of a water treatment device according to an embodiment of the present invention.
2 is a simple illustration of a frame of a water treatment device according to an embodiment of the present invention.
3 is a simplified view of a coupling structure of a water treatment device according to an embodiment of the present invention.
4 is a simplified view of an upper header of a water treatment device according to an embodiment of the present invention.
5 is a simplified view of a coupling structure of an upper header and a hollow fiber membrane sheet in a water treatment device according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, it will be described in more detail the specific examples of the present application. However, the technology disclosed in this application is not limited to the specific examples described herein and may be embodied in other forms.

However, the specific examples introduced herein are provided so that the disclosed content can be thorough and complete and the spirit of the present application can be sufficiently conveyed to those skilled in the art. In the drawing, in order to clearly express the components of each device, the size of the components, such as width or thickness, is shown somewhat enlarged. In addition, although only some of the components are shown for convenience of description, those skilled in the art will be able to easily grasp the remaining components of the components.

When describing the drawings as a whole, it has been described from an observer's point of view, and when an element is referred to as being located above or below another element, this means that the one element is located directly above or below another element, or an additional element between them. It includes all meanings that may be intervened. In addition, those skilled in the art will be able to implement the spirit of the present application in various other forms without departing from the technical spirit of the present application. Also, like reference numerals in a plurality of drawings denote substantially the same elements.

On the other hand, singular expressions described in this application should be understood to include plural expressions unless the context clearly indicates otherwise, and terms such as 'include' or 'having' refer to the described features, numbers, steps, It is intended to specify the presence of an operation, component, part, or combination thereof, but precludes the possibility of existence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof. It should be understood that it does not.

In addition, in the present specification, 'X to Y' representing a range means 'X or more and Y or less'.

water treatment Device

A water treatment device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3 . 1 is a simple illustration of a water treatment device according to one embodiment of the present invention, FIG. 2 is a simple illustration of a frame of a water treatment device according to one embodiment of the present invention, and FIG. It simply shows the coupling structure of the water treatment device according to the present invention. In FIG. 1 , z may indicate a longitudinal direction of the hollow fiber membrane, y may indicate a direction perpendicular to the longitudinal direction of the hollow fiber membrane, and x may indicate a thickness direction of the hollow fiber membrane sheet.

Referring to FIG. 1, the water treatment device according to one embodiment of the present invention is inserted into and fastened to a frame 100 having holes 110 into which both ends 200 of guide bars can be fastened, and the holes 110, It includes a guide bar 200 that guides the coupling of the hollow fiber membrane module 300 and a hollow fiber membrane module 300 slidably engaged with the guide bar 200, and the hollow fiber membrane module 300 includes the hollow fiber membrane module 300 ) includes an upper header 330 formed with a plurality of guide bar couplers 340 so as to be able to adjust the height.

The hollow fiber membrane module 300 of the present invention is slide-coupled with the guide bar 200 through the guide bar coupler 340 formed on the upper header 330, thereby adjusting the appropriate hollow fiber membrane slack for each hollow fiber membrane module. and maintenance, saving manpower, time, and cost for slack control, and flexible response is possible for each hollow fiber membrane module, thereby securing the flexibility of the hollow fiber membrane, thereby preventing contamination of the hollow fiber membrane more effectively. there is.

The frame 100 is only partially shown in the drawing, is provided with a hole 110 into which both ends of the guide bar 200 can be fastened, and supports the weight of the guide bar 200 to which the hollow fiber membrane module 300 is coupled. If possible, the structure, material, etc. are not particularly limited, and other forms may be implemented depending on the purpose, structure, and environment of the water treatment device.

The frame 100 may be formed with a plurality of holes to adjust the height of the guide bar 200 . A (height) interval between the holes of the plurality of holes may be 3 mm to 10 mm. In this case, together with the guide bar coupler 340 to be described later, appropriate slack can be maintained for each hollow fiber membrane module, thereby effectively preventing membrane contamination of the hollow fiber membranes.

The guide bar 200 may serve to couple and fix the frame 100 and the hollow fiber membrane module 300 .

Referring to FIG. 3 , both ends of the guide bar 200 may be fixed by being inserted into the hole 110 of the frame 100, and at the same time slide-coupled with the hollow fiber membrane module 300 (e.g., upper part). The hollow fiber membrane module 300 may be fixed and supported by sliding coupling with the guide bar coupling part 340 of the header 330.

For example, the height of the guide bar 200 itself may be adjusted according to the plurality of holes 110 formed in the frame 100 . In this case, there is an advantage in maintaining appropriate slack for each hollow fiber membrane module.

As long as the guide bar 200 can support the hollow fiber membrane module 300, the material and shape thereof are not particularly limited.

Although the drawing shows a water treatment device with two guide bars 200, the number of guide bars 200 may be appropriately adjusted according to the purpose of the water treatment device, use environment, and the like. For example, when there is only one guide bar 200, the rotational fluidity of the upper header 330 of the hollow fiber membrane module is also generated, so that sludge accumulation on the upper part of the hollow fiber membrane can be more effectively prevented. In the case of abnormal formation, there is an advantage in that the hollow fiber membrane module 300 is stably fixed.

The hollow fiber membrane module 300 is a hollow fiber membrane sheet 310 in which a plurality of hollow fiber membranes are stacked in a sheet shape, and an upper header extending in a longitudinal direction and a vertical direction of the hollow fiber membranes and disposed on top of the hollow fiber membrane sheet 310 330 and a lower header 350 disposed under the hollow fiber membrane sheet 310 and collecting treated water filtered by the hollow fiber membrane.

The hollow fiber membrane sheet 310 may be a unit sheet in which a plurality of hollow fiber membranes are arranged in a sheet shape, or a plurality of unit sheets may be stacked. The hollow fiber membrane sheets may be arranged in plurality along the longitudinal and width (thickness) directions of the header. 1 shows that four hollow fiber membrane sheets are arranged in the longitudinal direction, but is not limited thereto, and the thickness direction may also properly adjust the number of arrangements according to the purpose and environment of the water treatment device.

The hollow fiber membrane sheet may be formed by heating and compressing a plurality of hollow fiber membranes using a thermoplastic resin. As the thermoplastic resin that can be applied in the present invention, any resin that can be compressed by heating can be applied. For example, ethylene vinyl acetate, polyolefin, polystyrene, polycarbonate, polyvinyl chloride, polyamide, etc. may be used, but is not necessarily limited thereto.

Since the top of the upper header 330 can be opened, the flow of the water to be treated can be formed into the upper header 330, and air bubbles can also move into the upper header 330. Thus, it is possible to effectively prevent sludge from accumulating on the upper portion of the hollow fiber membrane.

Hereinafter, the upper header 330 of the present invention will be described in more detail with reference to FIG. 4 . 4 is a simplified view of an upper header of a water treatment device according to an embodiment of the present invention.

Referring to FIG. 4 , the upper header 330 is formed in the longitudinal direction of the guide bar 200 and includes a first horizontal wall part 331 and a second horizontal wall part 333 facing each other and the first horizontal wall part ( 331) and both ends of the second horizontal wall portion 333 are respectively connected, and the first vertical wall portion 335 and the second vertical wall portion ( 337), and the hollow fiber membrane module 300 can be slidably engaged with the guide bar through the guide bar coupler 340. (See Fig. 3)

The upper header 330 may accommodate a plurality of hollow fiber membrane sheets 310, and a first hollow fiber membrane sheet may be spaced apart from an adjacent second hollow fiber membrane sheet. Specifically, a plurality of hollow fiber membrane sheets may be arranged along the length direction and the width direction of the header, and when the hollow fiber membrane sheets are arranged in the width direction of the header, a gap is formed between the hollow fiber membrane sheets to form a gap during aeration of the water treatment device. The first hollow fiber membrane sheet and the second hollow fiber membrane sheet may independently freely move in the thickness direction. For example, reciprocating motion is freely possible in the thickness direction. In this case, accumulation of sludge can be more effectively prevented by the reciprocating flow and impact.

In addition, the hollow fiber membrane module 300 of the present invention is slidably coupled to the guide bar 200 through the guide bar coupler 340 formed on the upper header 330, thereby forming appropriate hollow fiber membrane slack for each hollow fiber membrane module. can be controlled and maintained, saving manpower, time and cost for slack control, and flexible response is possible for each hollow fiber membrane module, thereby securing the flexibility of the hollow fiber membrane, thereby preventing contamination of the hollow fiber membrane more effectively. There are advantages.

Specifically, the guide bar coupler 340 may be formed in plurality so as to adjust the height of the hollow fiber membrane module 300. For example, the plurality of guide bar couplers have a (height) interval between the couplers of 3 mm. to 10 mm, specifically may be 3 mm to 10 mm.

Hereinafter, the combination of the upper header 330 and the hollow fiber membrane sheet 310 in the water treatment device of the present invention will be described in detail with reference to FIG. 5 . 5 is a simplified view of a coupling structure of an upper header and a hollow fiber membrane sheet in a water treatment device according to an embodiment of the present invention.

Referring to FIG. 5 , the first horizontal wall portion 331 and the second horizontal wall portion 333 are provided with a pin coupling portion 345, and the hollow fiber membrane sheet 310 has a pin 347 at the pin coupling portion. 345 and the hollow fiber membrane sheet may be passed through and fixed to the upper header 330 .

Since the hollow fiber membrane sheet of the present invention can freely move in the thickness direction of the hollow fiber membrane sheet by being coupled to the upper header by pins (eg, free reciprocating motion), fluidity of the membrane is generated according to the flow of air bubbles and the water to be treated. Accumulation of sludge on the upper part of the hollow fiber membrane can be more effectively prevented.

For example, the distance (HD) between the first and second horizontal wall portions may be 1.1 to 2 times the thickness (MD) of the hollow fiber membrane sheet. Within the above thickness ratio range, appropriate fluidity is imparted to the hollow fiber membrane, and stable operation of the water treatment device is possible.

The lower header 350 may collect treated water filtered by the hollow fiber membrane, and the collected treated water may be discharged to the outside of the water treatment device through a treated water discharge pipe (not shown) through one or both ends of the lower header 350. can The water treatment device of the present invention minimizes sludge accumulation in the hollow fiber membrane instead of collecting treated water in the upper header 330 and collects treated water only in the lower header 350, so that the sludge accumulates less and has a longer lifespan. An improved water treatment device can be provided.

Another aspect of the present invention, a water treatment method, may be a method of water treatment using the above water treatment device.

Although the specific examples of the present invention have been described above, the present invention is not limited to the above specific examples and can be manufactured in various different forms, and those skilled in the art to which the present invention belongs can understand the technical spirit of the present invention. However, it will be understood that it may be embodied in other specific forms without changing its essential features. Therefore, it should be understood that the specific examples described above are illustrative in all respects and not limiting.

100: frame 110: hole
200: guide bar 300: hollow fiber membrane module
310: hollow fiber membrane sheet 330: upper header
331: first horizontal wall portion 333: second horizontal wall portion
335: first vertical wall portion 337: second vertical wall portion
340: guide bar coupler 345: pin coupler
347: pin 350: lower header

Claims (11)

A frame having holes through which both ends of the guide bar can be fastened;
a guide bar inserted into the hole and guiding coupling of the hollow fiber membrane modules; and
A hollow fiber membrane module slidably engaged with the guide bar,
The hollow fiber membrane module includes an upper header in which a plurality of guide bar couplers are formed to adjust the height of the hollow fiber membrane module,
The hollow fiber membrane module may include a hollow fiber membrane sheet in which a plurality of hollow fiber membranes are stacked in a sheet shape; an upper header extending perpendicular to the longitudinal direction of the hollow fiber membrane and disposed above the hollow fiber membrane sheet; And a lower header disposed under the hollow fiber membrane sheet and collecting treated water filtered by the hollow fiber membrane;
The upper header accommodates a plurality of hollow fiber membrane sheets, the first hollow fiber membrane sheet is spaced apart from the neighboring second hollow fiber membrane sheet in the thickness direction, and is formed in the longitudinal direction of the guide bar and faces each other. 1 horizontal wall part and a second horizontal wall part; and a first vertical wall part and a second vertical wall part connecting both ends of the first horizontal wall part and the second horizontal wall part, and having a plurality of guide bar couplers formed so as to adjust the height of the hollow fiber membrane module. The hollow fiber membrane module is slidably engaged with the guide bar through the guide bar coupler,
Wherein the first horizontal wall portion and the second horizontal wall portion are provided with a pin coupling portion, and the hollow fiber membrane sheet is fixed to the upper header by a pin penetrating the pin coupling portion and the hollow fiber membrane sheet.
delete delete According to claim 1,
The upper header is a water treatment device in which an upper portion of the header is open.
According to claim 1,
The water treatment device is a water treatment device in which the first hollow fiber membrane sheet and the second hollow fiber membrane sheet can independently freely move in the thickness direction during aeration.
delete According to claim 1,
The frame is a water treatment device in which a plurality of holes are formed to adjust the height of the guide bar.
According to claim 1,
The distance between the first horizontal wall portion and the second horizontal wall portion is 1.1 to 2 times the total thickness of the plurality of hollow fiber membrane sheets.
According to claim 1,
Water treatment device wherein the distance between the plurality of guide bar couplers is 3 mm to 10 mm.
According to claim 7,
The frame is a water treatment device in which the interval between the plurality of holes is 3 mm to 10 mm.
A method of treating water using the water treatment device according to any one of claims 1, 4, 5, and 7 to 10.

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