WO2019103479A1

WO2019103479A1 - Water treatment apparatus

Info

Publication number: WO2019103479A1
Application number: PCT/KR2018/014426
Authority: WO
Inventors: 차서은; 구영림; 민규홍
Original assignee: 롯데케미칼 주식회사
Priority date: 2017-11-23
Filing date: 2018-11-22
Publication date: 2019-05-31
Also published as: KR20190059596A

Abstract

A water treatment apparatus according to the present invention comprises: a module assembly in which a plurality of unit membrane modules are radially arranged; a plurality of air diffusing tubes formed at the lower end of the module assembly and radially arranged thereon; and an air supplying tube communicating with the center of the plurality of radially arranged air diffusing tubes so as to supply air thereto.

Description

Water treatment device

The present invention relates to a water treatment apparatus.

With the development of the industry and population growth, interest in efficient water use and treatment technologies is increasing. In recent years, membrane technology has been increasingly applied to ensure water quality stability in water treatment, under-wastewater treatment, and seawater desalination.

Conventional submerged separator cassettes / units are generally constructed such that the hollow fiber membranes or flat membranes are densely packed in a square bundle so that the modules are fixed to a rectangular parallelepiped frame arranged in a row or in multiple stages. When a rectangular parallelepiped-shaped module and a frame are applied to the submerged membrane device, there is a limitation in the method of collecting and aerating the corresponding type of cassette. Generally, the submerged membrane cassette generates air bubbles from air pipes arranged in a row along the bottom of the module to minimize contamination of the membrane. At this time, the piping for supplying gas to the air diffuser is usually positioned on one side of the cassette frame, The amount of gas supplied is not uniform depending on the position of the engine. As a result, some acid organs are clogged with sludge, and the membrane contamination in the module at the corresponding location rapidly proceeds.

This is not solved simply by adjusting the aeration flow rate, and there is a problem that manpower and time are considerably consumed for lifting the cassette periodically and cleaning the acid organs.

On the other hand, in the case of a cassette having a general rectangular parallelepiped shape, it is not easy to balance the weight for a stable structure. The phenomenon is deepened when the pipes for collecting and air cleaning are stuck to one side and the accumulation of sludge is accumulated in some modules due to the clogging of certain acid organs during operation due to the above mentioned problem. In fact, there are a lot of difficulties and risks for the workers due to the lifting work for installation and maintenance.

Accordingly, there is a need for a water treatment apparatus capable of uniformly supplying gas to an air diffuser and a separation membrane module of a water treatment apparatus, thereby minimizing film contamination and improving the service life by solving unbalanced accumulation of sludge.

Prior art relating to this is disclosed in U.S. Patent No. 8,038,882.

It is an object of the present invention to provide a water treatment apparatus which uniformly supplies air to the air diffusing pipe, prevents imbalance of sludge accumulation, and ultimately improves the life of the water treatment device.

Another object of the present invention is to provide a water treatment apparatus in which the water treatment efficiency is improved by preventing the sludge from being deposited in the filter substrate and the air diffuser.

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

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

1. According to one embodiment, the water treatment apparatus comprises a module assembly in which a plurality of unit membrane modules are radially arranged, a plurality of air diffusers arranged at the lower end of the module assembly, arranged radially, and a plurality of radially arranged mountains And an air supply pipe communicating with the center of the engine and supplying air.

2. The unit membrane module according to 1 above, wherein the unit membrane module comprises: a filtration substrate for filtering the WTBT; an upper and a lower header formed at upper and lower portions of the filtration substrate for collecting the filtrate; A first unit membrane module and a second unit membrane module adjacent to the first unit membrane module are radially arranged so that the water pipe is positioned at the center.

3. In above 2, the filter material may be a hollow fiber membrane.

4. In 2 above, the filter material may be a flat film.

5. In any one of 1 to 4 above, the plurality of air diffusers may be rotatable about the air supply pipe formed at the center.

6. The module assembly according to any one of 1 to 5, wherein the module assembly is rotatable about the air supply pipe formed at the center.

7. The air diffuser according to any one of 1 to 6, wherein the diffuser includes a plurality of diffuser holes formed along the longitudinal direction, and the plurality of diffuser holes may be larger in diameter as the diffuser is closer to the air supply pipe.

8. The module assembly according to any one of the above 1 to 7, wherein the module assembly comprises ≥ about 8 to about 24 unit membrane modules.

9. The water treatment apparatus according to any one of the above 1 to 8, wherein the water treatment apparatus may include about 4 to about 24 diffusers.

10. The unit membrane module according to any one of 1 to 9, wherein a width of the unit membrane module increases as the distance from the air supply pipe increases, and a distance (R) at the center of the air supply pipe (O) May range from about 1: 0.15 to about 1: 0.80.

It is an object of the present invention to provide a process for producing a sludge which is uniform in the air supply of the aeration column and prevents the imbalance of the sludge accumulation to ultimately improve the life of the water treatment apparatus and prevents the sludge from being deposited in the filter base and the acid furnace, And has an effect of providing a water treatment apparatus.

1 is a perspective view of a water treatment apparatus according to an embodiment of the present invention.

2 is a simplified vertical cross-sectional view of a water treatment apparatus according to an embodiment of the present invention.

3 is a simplified horizontal cross-sectional view of a water treatment apparatus according to one embodiment of the present invention.

4 is a more detailed illustration of portion A in a vertical section according to one embodiment of the present invention.

5 is a simplified horizontal cross-sectional view of a water treatment apparatus according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings. However, the techniques disclosed in this application are not limited to the embodiments described herein but may be embodied in other forms.

Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the width, thickness, and the like of the components are enlarged in order to clearly illustrate the components of each device. Also, while only a portion of the components is shown for convenience of explanation, those skilled in the art will readily recognize the remaining portions of the components.

When an element is described at the point of view of the general description of the drawings and an element is referred to as being located above or below another element, it is to be understood that the element may be located immediately above or below another element, Quot; can be intervened. Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. In the drawings, the same reference numerals denote substantially the same elements.

It should be understood, however, that the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise, and the terms "comprise" Acts, components, parts, or combinations thereof, but does not preclude the presence 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 the present specification, 'X to Y' representing the range means 'X to Y or less' or 'X to Y'.

Herein, the unit membrane module may include a filter substrate, upper and lower headers, and a water pipe, and may also refer to including a support.

수처리 장치Water treatment device

1 to 3, a water treatment apparatus according to an embodiment of the present invention will be described. FIG. 1 is a perspective view of a water treatment apparatus according to an embodiment of the present invention. FIG. 2 is a schematic vertical sectional view of a water treatment apparatus according to an embodiment of the present invention. 1 is a horizontal sectional view of a water treatment apparatus according to a specific embodiment.

According to one embodiment of the present invention, the water treatment apparatus 1000 includes a module assembly 300 in which a plurality of unit membrane modules 310 are arranged in a radial fashion, a plurality of unit membrane modules 310 formed in the lower end of the module assembly 300, And a plurality of air diffusers 150 and an air supply pipe 100 communicating with the centers of the plurality of air diffusers 150 radially arranged to supply air.

Uniform air supply can not be achieved, resulting in unstable unit membrane modules due to uneven cleaning efficiency, and the water treatment efficiency is remarkably deteriorated by such unit membrane modules, and time and cost such as recovery or replacement are increased there is a problem. The water treatment apparatus 1000 according to the present invention includes the air diffuser 100 disposed at the center and radially disposed in the center of the water treatment apparatus 1000 so that air can be uniformly supplied to the unit membrane modules 310, And ultimately improve the efficiency and life span of the water treatment apparatus 1000. [0064]

The unit membrane module 310 includes a filtration substrate 315 for filtrating water to be treated, upper and

lower headers

311 and 313 formed at upper and lower portions of the filtration substrate 315 to collect filtrate, And a water pipe (319) vertically formed at one end of the lower header (311, 313) and connecting between the upper and lower headers (311, 313), wherein the first unit membrane module And may be radially arranged so that the module and the water pipe are centrally located.

The filter base 315 may be arranged in a predetermined direction at a predetermined interval to form a bundle shape. The material and form of the filtration substrate 315 are not limited insofar as the filter substrate 315 is capable of filtering the water to be treated. As an example, the filtration substrate 315 may be formed of a material selected from the group consisting of polysulfone, polyethersulfone, polyimide, polyether imide, cellulose, cellulose acetate, polyvinyl alcohol, polyamide, polyethylene, polyfluorinated ethylene, polyvinylidene fluoride, Nitrile, polypropylene, polymethyl methacrylate, polytetrafluoroethylene, or polyether ketone. Specifically, it may include at least one of polyvinylidene fluoride (PVDF), polypropylene (PP), and polytetrafluoroethylene (PTFE). The form may be a hollow fiber membrane or a flat membrane.

The upper header 311 and the lower header 313 can collect the filtered water treated by the filter substrate 315. The upper header 311 and the lower header 313 may have flow passages therein and the lower header 313 may be connected to the upper header 311 or the collecting part 350 through the water pipe 319 The filtrate can be supplied. That is, the lower header 313 may communicate with the upper header 311 through the water pipe 319 or may communicate with the water collecting unit 350 through the water pipe 319. The upper header 311 and the lower header 313 are not limited as long as they have predetermined mechanical strength and durability. As an example, the upper header 311 and lower header 313 include polyvinyl chloride, polyolefin, polycarbonate, polysulfone, acrylic resin, ABS (acrylonitrile butadiene styrene) resin, modified PPE can do.

The water pipe 319 can function to communicate the lower header 313 with the upper header 311 and can function as a frame for maintaining the structure of the unit membrane module 310. The shape of the water pipe 319 is not particularly limited.

The water treatment apparatus 1000 may include, for example, ≥ about 8 to about 24, such as 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, or 24 unit membrane modules 310. In this case, the water treatment apparatus 1000 is excellent in the balance of washing efficiency due to dense and acidic groups.

The unit membrane module 310 may further include a support member 317 disposed between the upper header 311 and the lower header 313 and supporting the unit membrane module 310.

The support member 317 may function to fix the upper header 311, the lower header 313, and the plurality of filter substrates 315. The support member 317 may be in the form of a rod and may be in the form of being fitted to the upper header 311 and the lower header 313 respectively but not necessarily limited thereto, Various other variations are possible as long as the functions are performed. The coupling between the support member 317 and the upper header 311 and the lower header 313 can be modified in various ways.

The module assembly 300 may further include a support member 330 for supporting the unit membrane module 310.

The support base 330 serves to maintain the module assembly 300 at a certain distance from the air diffusing pipe 150. For example, the distance may be from about 1 cm to about 50 cm, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 , 18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42 , 43, 44, 45, 46, 47, 48, 49 or 50 cm, specifically ≥ about 1 cm to ≤ about 15 cm. 4, the supporter 330 may be spaced from the air diffusing pipe 150 by the engagement protrusion 110 formed on the air supply pipe 100, and may be rotatable.

The support member 330 may be formed of a material having a strength enough to support the unit membrane module 310 of the module assembly 300 and may be formed in a shape corresponding to the unit membrane module 310 . The supporting member 330 may further include a fixing member (not shown) for fixing the unit membrane module 310. The unit membrane module 310 may be configured to fix the unit membrane module 310 to the supporting member 330 And is not particularly limited.

The water treatment apparatus 1000 according to the present invention is connected to the upper header 311 of each unit membrane module 310 and is formed in the shape of a tube surrounding the air supply pipe 100, And a water collecting unit 350 for collecting the filtered treated water. In this case, since the pressure applied to each unit membrane module 310 is uniform, it is also possible to prevent uneven contamination of the separation membrane, and ultimately improve the efficiency and lifetime of the water treatment apparatus 1000. Depending on the environment, purpose and circumstances of the water treatment apparatus 1000, air may be supplied from the upper portion of the air supply pipe 100 or from the lower portion thereof. For example, when air is supplied from the top of the air supply pipe 100 (though not limited to the form of FIG. 2), the air passing through the center of the module assembly 300 and vertically communicating with the air diffusing pipe 150 .

The air diffusing pipe 150 is radially communicated with the lower portion of the air supply pipe 100 and is formed in the unit membrane module 310 to physically clean the filter medium 315.

Although not shown in the drawing, the air diffuser 150 may include a plurality of air diffusing holes formed along the length direction, and the diameter of the plurality of air diffusing holes may be larger toward the air supplying tube 100. In this case, there is an advantage that the membrane contamination of the filtration substrate near the air supply pipe 100 having a relatively small space can be more effectively removed. For example, the air diffusers 150 may be installed in the water treatment apparatus 1000 in a range of about 4 to about 16, such as 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, or 16 may be provided. In this case, the balance between the acid efficiency and the energy consumption of the water treatment apparatus 1000 is excellent.

The air supply pipe 100 may supply air to the air diffusing pipe 150 for aeration. The air supply pipe 100 may be formed in a cylindrical shape.

In the water treatment apparatus 1000 of the present invention, the plurality of air diffusers 150 may be rotatable about the air supply pipe 100 formed at the center. In addition, the module assembly 300 may be rotatable about the air supply pipe 100 formed at the center. This has the advantage that the sludge is prevented from being deposited in the filtration substrate and the organs, and the flow and movement of the air generated in the organs are formed and the sludge removal efficiency of the filtration substrate can be further improved.

Hereinafter, a water treatment apparatus according to another embodiment of the present invention will be described with reference to FIG. 5 is a simplified horizontal cross-sectional view of a water treatment apparatus according to another embodiment of the present invention.

In another embodiment of the present invention, the width of the unit membrane module 310 may increase as the distance from the air supply pipe 100 increases. 5, when the width of the unit membrane module 310 is increased as the distance from the air supply pipe 100 located at the center O increases, the degree of integration of the unit membrane module 310 is high and the water treatment efficiency is improved There are advantages.

The width increasing rate of the unit membrane module 310 may be appropriately varied according to the number of the unit membrane modules 310 included in the module assembly 300. For example, the width of the unit membrane module 310 may be proportional to the distance from the center O of the water treatment apparatus 1000 to a specific ratio. For example, the ratio of the distance R of the center of gravity O of the water treatment apparatus 1000 to the width MD may be about 1: 0.15 to about 1: 0.80, for example, 1: 0.16, 1: 0.29, 1: 0.28, 1: 0.23, 1: 0.24, 1: 0.25, 1: 0.26, 1: 0.27, 1: 0.28, 1: 0.29, 1: 0.31, 1: 0.31, 1: 0.32, 1: 0.33,1: 0.34,1: 0.35,1: 0.36,1: 0.37,1: 0.38,1: 0.39,1: 0.40,1: 0.41,1: 1: 0.54, 1: 0.52, 1: 0.53, 1: 0.54, 1: 0.45, 1: 0.61, 1: 0.62, 1: 0.63, 1: 0.64, 1: 0.65, 1: 0.66, 1: 0.66, 1: 0.55, 1: 0.56, 1: 0.57, 1: 0.67, 1: 0.78, 1: 0.77, 1: 0.78, 1: 0.79, 1: 1: 0.80, specifically ≤ about 1: 0.20 to ≥ about 1: 0.67, more specifically ≤ about 1: 0.31 to ≥ about 1: 0.53. In this case, not only is the water treatment apparatus 1000 well balanced in cleaning efficiency due to the density and the acidity, but also the interval between the unit membrane modules 310 is constant and the degree of integration is optimized.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is to be understood, therefore, that the embodiments described above are intended to be illustrative in all respects and not restrictive.

[Description of Symbols]

100: air supply unit 110:

150: diffusing tube 300: module assembly

310: unit membrane module 311: upper header

313: Lower header 315: Filtration substrate

317: support member 319: water pipe

330: support member 350:

1000: Water treatment device

Claims

A module assembly in which a plurality of unit membrane modules are radially arranged;

A plurality of air diffusers formed at the lower end of the module assembly and arranged radially; And

An air supply pipe communicating with the center of the plurality of radially arranged air diffusers to supply air;

.
The module according to claim 1 or 2,

A filtration substrate for filtering the water to be treated;

Upper and lower headers formed at upper and lower portions of the filtration substrate to collect filtrate; And

And a water pipe formed vertically at one end of the upper and lower headers and connecting the upper and lower headers,

And the second unit membrane module adjacent to the first unit membrane module is radially arranged so that the water pipe is positioned at the center.
3. The method of claim 2,

Wherein the filter material is a hollow fiber membrane or a flat membrane.
4. The method according to any one of claims 1 to 3,

Wherein the plurality of air diffusers are rotatable about the air supply pipe formed at the center.
5. The method according to any one of claims 1 to 4,

Wherein the module assembly is rotatable about the air supply pipe formed at the center.
6. The method according to any one of claims 1 to 5,

Wherein the diffuser comprises a plurality of diffuser holes formed along the longitudinal direction,

Wherein the plurality of air diffusing holes are larger in diameter than the air diffusing pipe.
7. The method according to any one of claims 1 to 6,

Wherein the module assembly comprises ≥ about 8 to about 24 unit membrane modules.
8. The method according to any one of claims 1 to 7,

The water treatment apparatus comprises a water treatment apparatus comprising < RTI ID = 0.0 > about < / RTI &
9. The method according to any one of claims 1 to 8,

The width of the unit membrane module increases with distance from the air supply pipe,

Wherein the ratio of the distance R at the air supply pipe center O to the width MD of the unit membrane module is about 1: 0.15 to about 1: 0.80.