WO2015080372A1

WO2015080372A1 - Electro-absorptive water treatment apparatus

Info

Publication number: WO2015080372A1
Application number: PCT/KR2014/009075
Authority: WO
Inventors: 윤석원; 이재봉; 김동화; 박필양; 김기형; 김규일
Original assignee: 한국전력공사
Priority date: 2013-11-28
Filing date: 2014-09-29
Publication date: 2015-06-04
Also published as: KR20150062052A

Abstract

An electro-absorptive water treatment apparatus of the present invention comprises: an outer plate having one or more first introduction holes formed therein through which inflow water is introduced; an inner plate having one or more second introduction holes formed at an edge portion thereof through which the inflow water is introduced; a porous member disposed between the outer and inner plates to form a fluid channel of the introduced inflow water; one or more absorptive cells stacked on the inner plate; and a discharge plate that is placed above the absorptive cells and has one or more discharge holes formed therein through which treated water is discharged.

Description

Electro-Adsorption Water Treatment Equipment

The present invention relates to an electrosorption water treatment device. More specifically, it is possible to optimize the distribution of influent water using a porous member, and to cope with the increase and decrease of the flow rate and the contamination of the water treatment device, and to prevent the contamination of the desalination device and to improve the adsorption efficiency. It is about.

In general, there are various methods for removing inorganic ions in water, such as agglomeration, ion exchange resin, reverse osmosis membrane, electrodialysis, evaporative condensation and electrophoresis. However, these methods are difficult in operation and maintenance, such as the complexity of the processing apparatus and energy consumption, and the problem of the generation of secondary pollutant water quality.

In order to solve this problem, a water treatment method using the electrochemical adsorption / desorption principle has been developed and used. Electrosorption type water treatment device is to install the positive and negative cells in the water to adsorb the anions and cations dissolved in the water, respectively, and purify the water by desorption.

Figure 1 shows an electrosorption water treatment apparatus conventionally used. Referring to FIG. 1, the conventional water treatment apparatus has a method of maintaining a constant space between the inlet side of the influent and the cell 40 for even distribution of the influent so that the influent flows through the space. However, in such a method, if the amount of influent is changed or the flow rate of the influent is increased, channeling of the influent inevitably occurs, thus making it difficult to distribute the influent, thereby causing a partial distribution of the fluid through only a part of the cell. And flow to greatly reduce the efficiency of the device. In addition, the conventional water treatment apparatus, as described above, requires a large space between the inlet and the cell for even distribution of the inflow water, and thus the size of the water treatment apparatus is also inefficient.

Figure 2 shows another type of electrosorption water treatment device conventionally used. Referring to FIG. 2, the water treatment device is equipped with a porous plate 22 in which numerous pores of a relatively large diameter having a diameter of about 5 mm are present, and then the cell 40 and the porous plate 22 as in the water treatment device of FIG. 1. There may be some space between) to make the distribution of influent more active. However, even in such a water treatment device, a constant space is required for even distribution of influent, and it was difficult to prevent inflow channeling.

In addition, in the conventional water treatment apparatus, one or more water treatment apparatuses are connected in series for the purpose of improving the water quality of the treated water. As the operating period of the water treatment apparatus passes, some of the components of the cells in the apparatus deteriorate and fall off. As a result, large particles grown from microparticles deposited on the cell surface for a long time inevitably occur. When these particles move to the next device and block a part of the cell, the flow of the fluid is blocked and thus the adsorption efficiency of the cell is greatly reduced. .

However, since the number of devices included in the general water treatment apparatus is used in the hundreds to thousands or more, it is impossible to install all the filters between the apparatus and the apparatus in order to prevent such a phenomenon. Since it is almost impossible to find the cells installed in each device one by one, there is a problem in that the maintenance and maintenance of the water treatment device is very difficult.

In addition, due to the characteristics of the cells stacked in multiple layers as described above, even when a defect of a specific cell occurs, initial detection is impossible, and a defect of a specific cell is propagated to neighboring cells so that only a large loss occurs, so that it is impossible to recover. This often occurred. In addition, due to the characteristics of the electrosorption device, the variable voltage applied to the device is small, so that it is difficult to respond quickly to changes in the influent concentration flowing into the device.

It is an object of the present invention to provide an electrosorption type water treatment device having excellent inflow blocking efficiency of contaminants contained in influent.

Another object of the present invention is to provide an electrosorption type water treatment apparatus capable of uniform distribution of influent, thereby preventing channeling.

Still another object of the present invention is to provide an electrosorption water treatment device capable of easily increasing or decreasing the flow rate and easily coping with influent.

Still another object of the present invention is to provide an electrosorption water treatment device capable of minimizing the installation space and size of the device.

Still another object of the present invention is to provide an electrosorption type water treatment device that is easy to maintain and maintain.

One aspect of the invention relates to an electrosorption water treatment device. In one embodiment, the electrosorption water treatment device includes: an outer plate on which one or more first inlets are formed so that the inflow water is introduced; An inner plate on which one or more second inlets are formed at an edge to introduce the influent; A porous member formed between the outer plate and the inner plate to form a flow path of the introduced inflow water; One or more adsorption cells stacked on the inner plate; And an outlet plate positioned above the adsorption cell and having one or more outlets formed therein to allow the treated water to flow out.

In one embodiment, the outer plate is characterized in that it comprises at least one of acrylic resin, polyester resin, polycarbonate resin, epoxy resin and cyclo olefin resin.

In one embodiment, the porous member is characterized in that the form selected from mesh and nonwoven fabric.

In one embodiment, the pore size formed in the mesh-shaped porous member is about 0.01 mm to about 2 mm, and the pore size formed in the nonwoven fabric-shaped porous member is about 5 μm to about 100 μm.

In one embodiment, the porous member is characterized in that laminated more than one layer.

In one embodiment, the porous member is characterized in that it comprises at least one of urethane resin, silicone resin, epoxy resin, polyurethane, polyethylene, polyester, polyacrylate, polystyrene and polyamide.

In one embodiment the diameter of the first inlet is characterized in that about 1/3 to about 1/20 of the outer plate length (R1).

In one embodiment the diameter of the second inlet is characterized in that formed in the size of about 2mm to about 30mm.

The electrosorption water treatment device according to the present invention is excellent in the adsorption efficiency of the treated water, uniform distribution of the influent can prevent the channeling phenomenon, easy to cope with the increase and decrease of the flow rate and device contamination by the influent, Since unnecessary space for forming a flow path required for the existing water treatment apparatus can be reduced, the installation space and size of the water treatment apparatus can be minimized, and the maintenance and maintenance of the apparatus can be easily performed.

Figure 1 shows an electrosorption water treatment apparatus used in the prior art.

Figure 2 shows another type of electrosorption water treatment apparatus used conventionally.

Figure 3 shows the outer plate, porous member, inner plate and discharge plate of the electrosorption water treatment apparatus according to the present invention.

Figure 4 shows an electrosorption water treatment apparatus according to an embodiment of the present invention.

Figure 5 shows the flow path formation direction of the electrosorption water treatment apparatus according to an embodiment of the present invention.

Figure 6 (a) shows the series connection structure and the flow path forming direction of the electrosorption water treatment apparatus according to an embodiment of the present invention, (b) is a series connection structure and the flow path forming direction of the conventional electrosorption water treatment apparatus used It is shown.

7 is a graph showing an increase in the differential pressure with respect to the operating time of the embodiment and the comparative example for the present invention.

In the following description of the present invention, when it is determined that detailed descriptions of related well-known technologies or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

The terms to be described below are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators, and the definitions should be made based on the contents throughout the present specification for describing the present invention.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

One aspect of the invention relates to an electrosorption water treatment device. 3 shows the outer plate 10, the porous member 20, the inner plate 30 and the discharge plate 50 of the water treatment device 100 of the present invention. Figure 4 also shows an electrosorption water treatment apparatus 100 according to an embodiment of the present invention. 3 and 4, in one embodiment of the present invention, the electrosuction water treatment apparatus 100 includes an outer plate 10; An inner plate 30; A porous member 20 formed between the outer plate 10 and the inner plate 30; One or more adsorption cells 40 stacked on the inner plate 30; And an outlet plate 50 positioned above the adsorption cell 40.

Outer plate

The outer plate 10 may be included for the purpose of introducing the influent water to be treated. Referring to FIG. 3, the outer plate 10 has one or more first inlets 12 formed therein so that the inflow water may be introduced into the water treatment apparatus 100 according to the present invention through the first inlets 12. Can be.

In one embodiment, the first inlet 12 may be formed at the central portion of the outer plate 10. When formed as above, an even flow rate distribution may be easier.

In one embodiment, the outer plate 10 may have a circular or polygonal shape. For example, it may have a circular shape.

In the present invention, the diameter of the first inlet 12 may be changed according to the properties and flow rate of the influent. Referring to FIG. 3, in one embodiment, the diameter of the first inlet 12 may be about 1/3 to about 1/20 of the length R1 of the outer plate 10. Inflow water in the above range can be easily introduced into the porous member. For example, the diameter of the first inlet 12 may be formed in a size of about 1/4 to about 1/15 of the length R1 of the outer plate 10. In embodiments it may be formed in a size of about 1/5 to about 1/12.

As shown in FIG. 3, when the outer plate 10 is circular, the length R1 means the diameter of the outer plate 10, and in the case of a polygon, the length R1 means the longest width.

In an embodiment, the material of the outer plate 10 may be formed of metal, ceramic, glass, rubber, plastic, or the like, but is not necessarily limited thereto. In one embodiment, the outer plate 10 may be formed of a plastic material. For example, acrylic resin, polyester resin, polycarbonate resin, epoxy resin, cycloolefin resin, etc. can be used. These can be used individually or in mixture of 2 or more types.

Existing water treatment device was very difficult to find the device that the adsorption efficiency is lowered by the external pollutants, and unlike the existing water treatment device that needs to disassemble the inner cell for maintenance, the outer plate (10) In the case of forming a), the contamination state of the porous member 20 can be easily grasped from the outside to be replaced or repaired, so that the water treatment apparatus 100 can be more easily repaired and maintained.

Porous Member

The porous member 20 may be included for the purpose of forming a flow path of the inflow water introduced through the first inlet 12 of the outer plate 10, even distribution of the flow rate and removal of contaminants contained in the inflow water.

In one embodiment, the porous member 20 may have a circular or polygonal shape. For example, it may have a circular shape.

In the present invention, the mesh and the non-woven porous member 20 may be formed of a polymer material. In one embodiment the polymer material is characterized in that it comprises at least one of urethane resin, silicone resin, epoxy resin, polyurethane, polyethylene, polyester, polyacrylate, polystyrene and polyamide. When applying the material may be excellent in flexibility, durability.

In one embodiment, the porous member 20 may be formed in the form of one or more selected from mesh (mesh) and non-woven fabric (non-woven fabric). The pollutants contained in the inflow water flowing in the form can be removed first.

In one embodiment, the pore size formed in the mesh-type porous member 20 may be about 0.01 mm to about 2 mm, and the pore size formed in the nonwoven fabric-type porous member 20 is about 5 μm to about 100 μm. In the pore size range, contaminants included in the inflow water introduced with the formation of the flow path and the uniform flow distribution can be easily removed. For example, the size of the pore formed in the mesh-shaped porous member 20 may be about 0.5mm to about 1.5mm, the size of the pore formed in the non-woven porous member 20 is about 10㎛ To about 90 μm.

Therefore, the mesh type porous member 20 and the nonwoven fabric type porous member 20 may be appropriately selected and used according to the properties of the influent according to the particle size of the contaminant in the influent. Can be.

In another embodiment, the pores formed in the mesh member and the non-woven porous member 20 may be formed in the same size, or may be formed in a different size.

In addition, the porous member 20 may be used by laminating one or more. In one embodiment, the stacking may stack the porous members 20 having the same shape or stack the porous members 20 having different shapes.

In one embodiment, the mesh-shaped porous member 20 is disposed on one surface of the outer plate 10, and then a plurality of non-woven porous members 20 may be stacked. When applying the laminated structure of the porous member 20 as described above, it is possible to easily form the flow path and equal distribution, and at the same time can easily remove contaminants of various sizes contained in the influent, the adsorption cell 40 Adsorption efficiency of the influent can be further improved.

3 and 4, the inflow water introduced through the first inlet 12 formed in the outer plate 10 is distributed at an equal flow rate along the flow path formed according to the thickness of the porous member 20. It may be introduced into the water treatment apparatus 100 through the second inlet 32 of the inner plate 30 formed on the inner plate 30 to be described later.

Inner plate

The inner plate 30 may be included to introduce the inflow water moved by the flow path formed in the porous member 20 into the water treatment apparatus 100.

3 and 4, at least one second inlet 32 is formed at an edge of the inner plate 30 to allow the inflow of the porous member 20 to flow into the water treatment apparatus 100. . As described above, when the second inlet 32 is formed at the edge, an even inflow of water may be distributed, thereby further improving water treatment efficiency.

In the present specification, the “edge” may refer to an end portion around the inner plate 30, as shown in FIG. 3. For example, the second inlet 32 may be positioned at a distance of about 5% to about 30% of the radius of the inner plate 30 from the outer circumference of the inner plate 30. For example, the second inlet 32 may be located at a distance of about 8% to about 25% of the radius of the inner plate 30 from the outer circumference of the inner plate 30. In embodiments, the second inlet 32 may be positioned at a distance of about 0.1 mm to about 100 mm from the outer circumference of the inner plate 30. For example, it may be located at a distance of about 0.5mm to about 70mm.

In addition, the second inlets 32 may be disposed at edges of the inner plate at uniform intervals. In embodiments the spacing between the plurality of second inlets 32 may be about 1 mm to about 100 mm. For example, it may be about 5mm to about 80mm.

The number of the second inlets 32 is not particularly limited, but may be one or more, for example, 2 to 150. For example, 4 to 120 may be formed. For example, it may be 10 to 100. Distribution of the influent can be easily made in the above range.

In one embodiment, the inner plate 30 may be formed of a plastic material. In one embodiment, the inner plate 30 may be acrylic resin, polyester resin, polycarbonate resin, epoxy resin and cyclo olefin resin. These can be used individually or in mixture of 2 or more types. When the material is formed of the material, it is possible to easily grasp the contamination state inside the water treatment apparatus 100 can be easy to maintain and repair.

In addition, in another embodiment, the inner plate 30 may be formed of a metal material. In one embodiment, the inner plate 30 may be used alone or in combination of nickel, titanium, copper, aluminum, iron, stainless steel and alloys thereof.

The diameter of the second inlet 32 may be appropriately selected according to the properties and flow rate of the influent. In one embodiment, the diameter of the second inlet 32 formed in the inner plate 30 may be formed to a size of about 0.2mm to about 30mm. In this range, the adsorption efficiency of the device may be excellent. For example, the diameter of the second inlet 32 may be formed to a size of about 2mm to about 30mm. For example, about 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 It may be formed in the size of 25, 26, 27, 28, 29 or 30mm.

In embodiments, the ratio of the diameters of the first inlet 12 and the second inlet 32 may be about 1: 1 to about 50: 1. There is an advantage in the distribution of influent water evenly in the above range. For example, about 2: 1 to about 30: 1 can be. For example, about 3: 1 to about 15: 1.

Referring to FIG. 4, in the present invention, the outer plate 10, the porous member 20, and the inner plate 30 may be in close contact with each other. When the structure is formed as described above, unnecessary space for forming a flow path required for the existing water treatment apparatus as shown in FIGS. 1 and 2 can be reduced, thereby minimizing the installation space and size of the water treatment apparatus 100.

Adsorption Cell

The adsorption cell 40 may be included for the purpose of removing contaminants such as inorganic ions in the water contained in the inflow water moved through the second inlet 32.

In the present invention, the adsorption cell 40 may be a conventional one. For example, the adsorption cell 40 may include a current collector, an adsorption electrode, and an ion exchange membrane.

In the present invention can be prepared by adjusting the number of the adsorption cells 40 according to the properties of the influent and the concentration of the desired treated water. In one embodiment, one or more adsorption cells 40 may be stacked. For example, it can laminate and use 2-50 pieces. The plurality of adsorption cells are stacked in such a manner that the first adsorption cell is positioned above the second adsorption cell in the same direction in which the outer plate 10, the porous member 20, and the inner plate 30 are stacked.

In addition, when one or more adsorption cells 40 are stacked, the adsorption cells 40 may be closely connected to each other by elastic means (not shown). In one embodiment, the elastic means may be a spring or an elastic metal, but is not limited thereto. In one embodiment, power may be applied to each of the current-carrying plates of the plurality of stacked adsorption cells to adsorb ions of the water to be treated.

Discharge plate

The discharge plate 50 may flow into the water treatment device 100 to discharge the discharged water from which the pollutant is removed by the adsorption cell 40. One or more outlets 52 are formed in the discharge plate 50 to discharge the discharged water from which the contaminants are removed by the adsorption cell 40.

In one embodiment, the discharge plate 50 may have a circular or polygonal shape. For example, it may have a circular shape.

In one embodiment, the discharge plate 50 may be formed of a plastic material. In one embodiment, the discharge plate 50 may use acrylic resin, polyester resin, polycarbonate resin, epoxy resin, cycloolefin resin, and the like. These can be used individually or in mixture of 2 or more types.

In addition, in another embodiment, the discharge plate 50 may be formed of a metal material. In one embodiment, the discharge plate 50 may be used alone or in combination of nickel, titanium, copper, aluminum, iron, stainless steel and alloys thereof.

In one embodiment the outlet 52 may be formed in the central portion of the discharge plate (50).

The diameter of the outlet 52 may be changed according to the flow rate of the discharge water.

In the present invention, the length R2 of the discharge plate 50 and the length R1 of the outer plate 10 may be the same or different.

Referring to FIG. 3, in one embodiment of the present invention, the diameter of the outlet 52 may be about 1/10 to about 1/20 of the length R2 of the outlet plate 50. Ejection of the discharged water in the size range is easy, and may be easily coupled to the first inlet 12 of the outer plate 10 in series connection of the water treatment device 100 to be described later. For example, the diameter of the discharge port 52 may be formed in a size of about 1/10 to about 1/15 of the length R2 of the discharge plate 50.

When the discharge plate 50 is circular as shown in FIG. 3, the length R2 may mean the diameter of the discharge plate 50.

5 briefly illustrates a direction in which a flow path is formed in the electrosuction water treatment apparatus 100 according to an embodiment of the present invention. 4 and 5, the inflow water distributed and transferred at an equal flow rate through the second inlet 32 is passed through the adsorption cell 40 stacked inside the apparatus 100, and the outlet 52. Can be discharged through). In this case, since the inflow water discharged from the second inlet 32 is introduced into the side of the adsorption cell 40, uniform inflow into the plurality of adsorption cells is possible.

In another embodiment of the present invention, the water treatment device 100 may be operated by connecting one or more in series. Figure 6 (a) shows a series connection structure of the electrosorption water treatment apparatus 100 according to an embodiment of the present invention, (b) shows a series connection structure of the conventional electrosorption water treatment apparatus used. Referring to FIG. 6, the outlet 52 and the first inlet 12 of the water treatment apparatus 100 may be fastened through the fastening means 60 to be connected in series. The fastening means 60 may be a conventional one, for example, can be fastened using an o-ring (o-ring) or the like. When using the fastening means 60 can prevent the outflow of the introduced influent water.

In addition, the water treatment apparatus 100 (FIG. 6 (a)) of the present invention connected in series does not need a space for forming a flow path, so that the installation space and the water treatment apparatus 100 of FIG. The size can be minimized.

Hereinafter, the configuration and operation of the present invention through the preferred embodiment of the present invention will be described in more detail. However, the following examples are provided to help the understanding of the present invention, and the scope of the present invention is not limited to the following examples. Details that are not described herein will be omitted since those skilled in the art can sufficiently infer technically.

Examples and Comparative Examples

Example

A round outer plate of transparent acrylic material is prepared, and a first inlet having a size of 1/10 of the outer plate length is formed at the center of the outer plate, a round inner plate of transparent acrylic material is prepared, and the first inlet at the edge. Eighty inlets having a size 1/10 of the diameter were formed.

The outer plate is disposed between the outer plate and the inner plate, and a mesh-shaped porous member having a pore size of 1 mm of polyester material is formed thereon, and then laminated five sheets of porous members having a nonwoven fabric having a pore size of 80 μm. The porous member and the inner plate were formed to have a stacked structure.

10 sheets of adsorption cells connected by using an elastic metal on top of the inner plate were stacked, and then a circular acrylic discharge plate was prepared, and a discharge port was formed at the center of the discharge plate so as to be 1/10 of the diameter of the discharge plate. By arranging the stacked adsorption cells on the top to prepare five water treatment devices.

An electrosorption type water treatment device was manufactured in the form as shown in FIG. 6 (a) by connecting in series using an o-ring as a fastening means for fastening the first inlet and the outlet of the water treatment device.

Comparative example

Inlets and outlets for inflow and outflow are formed, and the same adsorption cells as in the embodiment are arranged in parallel in the vertical direction, and then a space is formed between the inlets and the cells for forming a flow path and equal flow distribution. Five formed water treatment apparatuses were manufactured, and an inlet and an outlet of the water treatment apparatus were connected in series using the same o-ring as in the above embodiment to prepare an electrosorption type water treatment apparatus as shown in FIG.

Test Example

For the water treatment apparatuses according to the above examples and comparative examples, the increase in the device differential pressure over the operation time was compared. In this case, in order to increase the speed of the differential pressure increase during the operation of the apparatus of the Examples and Comparative Examples, the inlet water containing particulate contaminants and the turbidity of 5 NTU inflow is shown in FIG. Referring to FIG. 7, it can be seen that although the differential pressure phenomenon occurs as the operating time increases due to the particulate matter, the width of the differential pressure increase is smaller than that of the comparative example.

6 (a) and 6 (b), in the apparatus of the comparative example, a partial phenomenon occurs in the flow path in the apparatus due to clogging of some cells by the particulate contaminants contained in the influent, but the apparatus of the example It was found that the particulate contaminants are adsorbed on the porous member and have a stable flow without abnormal distribution of the flow path.

In addition, in the water treatment apparatus of the embodiment, the outer plate 10, the porous member 20 and the inner plate 30 are formed in close contact with each other, as shown in FIG. 6 (a), between the adsorption cell 40 and the discharge plate 50. Since the space for forming the flow path is unnecessary, the volume and the installation space can be minimized as compared to the water treatment apparatus of the comparative example as shown in FIG.

Claims

An outer plate on which one or more first inlets are formed to introduce the inflow water;

An inner plate on which one or more second inlets are formed at an edge to introduce the influent;

A porous member formed between the outer plate and the inner plate to form a flow path of the introduced inflow water;

One or more adsorption cells stacked on the inner plate; And

And an outlet plate disposed above the adsorption cell and having at least one outlet formed therein for discharge of the treated water.
The apparatus of claim 1, wherein the outer plate comprises at least one of acrylic resins, polyester resins, polycarbonate resins, epoxy resins and cycloolefin resins.
The apparatus of claim 1, wherein the porous member is selected from at least one of a mesh and a non-woven fabric.
According to claim 3, The pore size formed in the mesh-like porous member is about 0.01mm to about 2mm,

The pore size formed on the porous member of the nonwoven fabric is characterized in that about 5㎛ to about 100㎛ electrosorption water treatment apparatus.
The apparatus of claim 1, wherein the porous member is laminated in one or more layers.
The apparatus of claim 1, wherein the porous member comprises at least one of urethane resin, silicone resin, epoxy resin, polyurethane, polyethylene, polyester, polyacrylate, polystyrene, and polyamide.
The apparatus of claim 1, wherein the diameter of the first inlet is about 1/3 to about 1/20 of the outer plate length (R1).
The apparatus of claim 1, wherein the diameter of the second inlet is about 2 mm to about 30 mm in size.