KR102058553B1 - Series structure type capacitive deionization device for preventing electrode reaction and scale generation - Google Patents

Abstract

The present invention relates to a capacitive deionization device with a serial structure for preventing electrode reaction and scale occurrence. To be more specifically, the capacitive deionization device comprises: a main body including an internal space and having an opening unit at one side and the other side thereof, respectively; a first electrode unit combined with the opening unit at the one side of the main body, and giving either positive (+) power or negative (-) power; a second electrode unit combined with the opening unit at the other side of the main body and giving power having the opposite polarity to the first electrode unit; a plurality of internal electrodes placed in the direction at right angles to the longitudinal direction of the main body in the internal space in a state of being mutually separated from one another, charged to have a polarity in which charge is mutually alternated according to power supply of the first electrode unit and the second electrode unit and thus, selectively adsorbing or desorbing ions to or from influent flowing into the internal space; and a power supply unit supplying DC power to the first electrode unit and the second electrode unit.

Description

Capacitive deionization device for preventing electrode reaction and scale generation

In the present invention, when electrically connecting a plurality of electrodes in series, separate electrode chambers for applying direct current power to one side and the other side spaced apart from the plurality of electrodes, respectively, so that each electrode chamber has a structure in which electrolyte can circulate. The present invention relates to a capacitive deionization device having a series structure capable of preventing electrode reaction and scale generation due to supply.

In Korea, water shortages are severe, reducing dependence on available water resources, and reusing highly-treated effluents such as sewage and wastewater for various purposes, and securing high-quality drinking water through desalination of underground and seawater, including various heavy metals. Efforts are being made to secure clean water resources through the treatment of groundwater contaminated with ionic contaminants.

To this end, it is necessary to remove not only organic matter in water, but also suspended solids, viruses, dissolved solids, hardly decomposable substances, odors, and colors. In particular, the desalination or deionization technology that removes various ionic substances present in water is an essential element for developing advanced water treatment technology.

The desalination technologies currently being developed and used commercially include conventional distillation, reverse osmosis (RO), electrodialysis (ED), and ion exchange (IEX). Processes have been technically proven and applied in many desalination plants.

However, these processes are increasingly effective due to high energy costs and deterioration of efficiency due to membrane contamination in the desalination process, and there is an increasing demand for new desalination technologies that can reduce energy costs.

Capacitive Deionization (CDI) is proposed as a new desalting technique based on the problems of the conventional desalination techniques, and the capacitive deionization apparatus has a small amount of current (0.1 to 0) that does not cause a water decomposition reaction to the porous carbon electrode. 1.2 volts) to adsorb and remove ions on the electrically charged electrode surface.

In the capacitive deionization reactor, anions move to the positive electrode and cations move to the negative electrode and are adsorbed. In the prior art, Korean Patent Registration No. 10-1022257 discloses that carbon electrodes integrated with current collectors are laminated, but the power supply is connected in parallel so that positive and negative electrodes are alternately formed on each current collector. It suggests techniques to perform.

However, the unipolar connection that connects all the electrodes in parallel with multiple current collectors in parallel is not easy to work due to the complicated grounding structure and can lead to equipment failure such as assembly error and improper grounding due to the excessive contact. there is a problem. In addition, for example, in operating such a device, all the electrodes are electrically connected in parallel with each other so that a voltage of 1.2 volts (V) is applied to each current collector, thereby connecting to an external power supply. As the number of stacks increases, the external power supply capacity must be brought to the low voltage-high current specification. Therefore, it is not easy to keep the low voltage constant at the electrode continuously, and the cause of the power supply failure is caused by the high current generated by the parallel connection of multiple electrodes. There is a problem in the stability of the device, such as lowering the device efficiency and current efficiency.

Accordingly, in recent years, a technique for electrically connecting electrodes used in a capacitive deionization reactor has been proposed, but in a capacitive deionization reactor having a series structure, an electrolysis reaction is performed at an outermost electrode to receive external power. In this case, hydrogen ions are generated at the anode and hydroxide ions are generated at the cathode, so that the pH of the treated water can be changed, especially in the presence of bivalent hardness ions such as Ca 2+ or Mg 2+ in the water. As the scale is formed, there is a problem of degrading the life and function of the electrode.

Korea Patent Registration No. 2011-1022257

Accordingly, an object of the present invention is to provide a structure in which the electrolyte solution can be circulated in each electrode chamber while separately configuring an electrode chamber for applying direct current power to one side and the other side separated from the plurality of electrodes in electrically connecting the plurality of electrodes in series. It is intended to provide a capacitive deionization device having a series structure that can prevent electrode reaction and scale generation due to power supply.

In accordance with a preferred embodiment of the present invention for achieving the above object, a series of capacitive deionization apparatuses for preventing electrode reaction and scale generation may include: a main body having an inner space and openings formed at one side and the other side; A first electrode unit coupled to one opening of the main body and configured to supply one of + power and -power; A second electrode unit coupled to the other opening of the main body and configured to supply power having a polarity opposite to that of the first electrode unit; With respect to the inflow water which is arranged to be spaced apart from each other in a direction perpendicular to the longitudinal direction of the main body in the inner space and charged so as to have a polarity in which charges alternate with each other when power is supplied to the first electrode portion and the second electrode portion. A plurality of internal electrodes that selectively adsorb or desorb ions; And a power supply unit supplying DC power to the first electrode unit and the second electrode unit.

As one example, the first electrode portion is coupled to one opening of the main body and a first support net made of a porous material is mounted at a central portion facing the inner space of one side of the main body, and faces toward the outside at the center of the first support net. While the discharge pipe is in communication with the one side inner space is mounted, the first separation plate is formed in any one portion outside the central portion is formed with a first through-hole communicating with the one inner space; The central portion of one surface coupled to the outer side of the first separating plate and facing the first support network is formed with a circulation space exposed in a groove shape, and the other surface has a pair of circulation holes and the discharge pipe communicating with the circulation space. A first side plate having a through hole configured to pass through and exposed to the outside, and having a first inlet hole communicating with an inner space of one side of the main body at a position facing the first through hole; A first electrode disposed in the circulation space of the first side plate and extending to expose at least one power input projection to the outside; And an electrolyte solution circulating through the circulation space through the pair of circulation holes.

As one example, the second electrode portion is coupled to the other opening of the main body and a second support network of a porous material is mounted on the central portion facing the other inner space of the main body, and the first through hole of the first separation plate and A second separation plate having a second through hole communicating with the other inner space at a point symmetric part; The central portion of one surface coupled to the outer side of the second separating plate and facing the second support network is configured with a circulation space exposed in a groove shape, and the other surface is configured with a pair of circulation holes communicating with the circulation space. A second side plate configured to have a second inflow hole communicating with the other inner space of the main body at a position facing the two holes; A second electrode disposed in the circulation space of the second side plate and extending to expose at least one power input projection to the outside; And an electrolyte solution circulating through the circulation space through the pair of circulation holes.

As an example, the inner electrode of the inner electrode except for the outermost inner electrode adjacent to the second electrode portion is characterized in that the flow hole is formed in the central portion.

As an example, one outermost inner electrode adjacent to the first separator plate and the other outermost inner electrode adjacent to the second separator plate may be disposed in close contact with the first support network and the second support network, respectively. It is characterized by being.

As an example, the internal electrode may be composed of graphite and a pair of carbon electrodes in contact with both surfaces of the graphite.

As an example, a mesh spacer and an anion exchange membrane and a cation exchange membrane attached to one side and the other side of the mesh spacer may be disposed between the inner electrode and the inner electrode in the inner space.

As described above, according to the capacitive deionization device having a series structure for preventing electrode reaction and scale generation, the DC power is applied to one side and the other side separated from the plurality of electrodes in electrically connecting the plurality of electrodes in series. The electrode chamber is separated and configured to have a structure in which the electrolyte can circulate. As a result, the electrode reaction of the electrode and the electrolysis reaction in the water do not occur, so that the pH of the treated water changes or scale is generated. There is an effect that can be prevented.

1 is a side cross-sectional view showing the configuration of a power storage deionizer according to an embodiment of the present invention.
Figure 2 is a side cross-sectional view showing a first separator plate of the first electrode portion according to an embodiment of the present invention.
Figure 3 is a side cross-sectional view showing a first side plate of the first electrode unit according to an embodiment of the present invention.
Figure 4 is a side cross-sectional view showing a second separator plate of the second electrode portion according to an embodiment of the present invention.
Figure 5 is a side cross-sectional view showing a second side plate of the second electrode unit according to an embodiment of the present invention.
6 is a perspective view illustrating a first electrode or a second electrode according to an embodiment of the present invention.
Figure 7 is a side cross-sectional view for explaining the operating state of the electrical storage deionization device according to an embodiment of the present invention.

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to the accompanying drawings. In describing the present invention, the term or word used in the present specification and claims is based on the principle that the inventor can appropriately define the concept of the term in order to best describe the invention of his or her own. It should be interpreted as meanings and concepts corresponding to the technical idea of

1 is a side cross-sectional view showing the configuration of a power storage deionization device according to an embodiment of the present invention, Figure 2 is a side cross-sectional view showing a first separator plate of the first electrode unit according to an embodiment of the present invention, Figure 3 Is a side cross-sectional view showing a first side plate of the first electrode unit according to an embodiment of the present invention. 4 is a side cross-sectional view illustrating a second separator of a second electrode unit according to an embodiment of the present invention, and FIG. 5 is a side cross-sectional view illustrating a second side plate of a second electrode unit according to an embodiment of the present invention. 6 is a perspective view illustrating a first electrode or a second electrode according to an embodiment of the present invention.

In order to prevent the electrode reaction and scale generation of the present invention, a series storage capacitor deionizer (hereinafter, referred to as a capacitive deionizer) is an electrode chamber for applying power so that power of different polarities is applied to one side and the other side, respectively. To prepare.

The plurality of internal electrodes 40 are arranged side by side between the electrode chambers of the two sides to form potentials due to the bipolar phenomenon in the internal electrodes 40 such that ions may be adsorbed or desorbed from the respective internal electrodes 40.

Accordingly, since the internal electrode 40 substantially performing the water treatment on the influent is separated without physical connection with each electrode chamber, the electrode reaction and the electrolysis reaction in the water do not occur. It can be solved.

In particular, since the electrolyte chamber has a structure in which the electrolyte can be circulated, there is no scale-inducing material such as Ca2 + or Mg2 +, thereby preventing scale formation problems.

Referring to FIG. 1, the power storage deionization apparatus of the present invention includes a main body 10 and electrode chambers coupled to both sides of the main body 10 (hereinafter, 'first electrode portion 20' and 'second electrode'). And a plurality of internal electrodes 40 and the first electrode part 20 and the second electrode part 30 which are arranged and accommodated at predetermined intervals in the main body 10. It is configured to include a power supply (not shown) for supplying.

The main body 10 is provided with an inner space 100, and openings are formed at one side and the other side, respectively, and the inflow water to be treated may be introduced into the inner space 100, or the treated water from which ions are removed may be discharged.

In this case, the influent may be treated water that has undergone a pretreatment process.

For example, the pretreatment process is based on the floating principle through the injection of ultra-micro-foams, including oil (Fat, Oils, Grease, etc.) and particulate SS (Suspended solid) DAF (Dissolved Air) contained in the effluent from the wastewater treatment plant. Dissolved Air Flotation (DAF) process that removes Flotation, Organics, etc., and ACF (Adsorption) that removes TOC (Soluble Organic), Color Organic Contaminants by using porous activated carbon with high specific surface area. Combination of one or two or more of the MF (Micro Filtration) process, which filters and separates the particulate solid material remaining in the treated water after the DAF process and the ACF process using a separator having an activated carbon filter) process and a membrane having a pore diameter of 1 μm or less Process may be included.

The first electrode unit 20 is coupled to one side opening of the main body 10 and may be supplied with any one of + power or -power according to the selective power supply of the power supply unit.

The second electrode part 30 may be coupled to the other opening of the main body 10 and may supply power having a polarity opposite to that of the first electrode part 20.

The first electrode portion 20 and the second electrode portion 30 are configured to be separated from the internal space 100 of the main body 10, and the + power or-power supplied through the electrolyte circulating inside It can be delivered to the inner space (100).

First, the first electrode unit 20 according to an embodiment of the present invention may include a first separator 200, a first side plate 210, a first electrode 220, and an electrolyte.

As shown in FIGS. 1 and 2, the first separating plate 200 is coupled to an opening of one side of the main body 10 and a first support network 201 is mounted at a central portion facing the inner space 100. It is.

In this case, the first support network 201 is made of a porous material so that charge movement according to the power supplied from the first electrode unit 20 is performed on the outermost inner electrode 40 on one side adjacent to the first support network 201. To be possible.

In addition, the first support network 201 supports the outermost inner electrode 40 on one side adjacent to each other while separating between the inner space 100 of one side of the main body 10 and the first side plate 210 described below. It plays a role.

Meanwhile, at the center of the first support network 201, a discharge pipe 202 communicating with the inner space 100 while facing in an outward direction opposite to the direction of the one side inner space 100 of the main body 10 is provided. Mounted to allow the treated water to be discharged to the outside from the inner space 100 through the discharge pipe 202 in a state in which the first separation plate 200 is coupled to one side opening of the main body 10, and the central portion In other words, the first through hole 203 is formed in any one portion outside the portion where the first support network 201 is mounted to communicate with the internal space 100 of the main body 10.

The first through hole 203 shows an example formed in one corner portion in FIG. 2, but is not limited thereto.

The first side plate 210 is coupled to the outer surface of the first separating plate 20 and the central portion of one surface facing the first support network 201 is formed with a circulation space 211 exposed in the groove shape, On the other side of the through-hole through the pair of circulation holes (212-1, 212-2) and the discharge pipe 202 exposed to the outside through the circulation space 211 and communicate with the circulation space 211 ( 213 is configured.

In addition, the first side plate 210 has a first inlet hole 214 communicating with one side inner space 100 of the main body 10 at a position facing the first through hole 203, and has a first inlet. Through the ball 214 to allow the inflow of water to be treated into the one inner space 100 of the main body 10 from the outside.

The first electrode 220 is disposed in the circulation space 211 of the first side plate 210, and extends to expose the power input protrusion 221 to the outside through the first side plate 210. .

In this case, at least one power input protrusion 221 may be configured as a terminal for receiving power from the power supply unit, and FIG. 6 illustrates an example in which two power input protrusions 221 are configured.

In addition, in the case of the first electrode 220 configured in the first electrode unit 20, as shown in FIG. 6, the discharge pipe 202 has a structure passing through the center of the first side plate 210. A through hole having a diameter larger than the diameter of the discharge pipe 202 is configured at the center so that interference with the discharge pipe 202 does not occur.

The electrolyte may circulate through the circulation space 211 through the pair of circulation holes 212-1 and 212-2.

The electrolyte may be used as an electrolyte for transferring the charge of the first electrode 220 by selecting a suitable one of a variety of electrolytes according to the known art, for example, may be used NaCl solution.

That is, the electrolyte is introduced into the circulation space 211 through one circulation hole 212-1 and is discharged into another circulation hole 212-2 to perform continuous circulation, which is a circulation space 211. This is to prevent adsorption of ions, which may be generated by the electrolysis reaction, into the first electrode 220.

In this case, as the first electrode 220 is disposed in the circulation space 211 as described above, it is reasonable to use an insoluble electrode that does not dissolve in the electrolyte as a material.

In addition, although not shown in the drawings, the electricity storage deionizer of the present invention further includes a circulation means including a circulation line and a circulation pump connected to the pair of circulation holes 212-1 and 212-2 to circulate the electrolyte solution. can do.

The second electrode part 30 is similar to the first electrode part 20 to form one electrode chamber, and may have a structure similar to that of the detailed structure of the first electrode part 20.

That is, the second electrode part 30 also includes a detailed configuration of the second separator 300, the second side plate 310, the second electrode 320, and the electrolyte, but with the first electrode part 20. Otherwise, the configuration of the discharge pipe 202 or the through-hole 213 for the discharge of the treated or concentrated water is not included.

Specifically, as shown in FIGS. 1 and 4, the second separation plate 300 is coupled to the other opening of the main body 10, and the center portion facing the other inner space 100 of the main body 10 is above. The second support network 301 having the same structure and function as the first support network 201 described above is mounted, and the other inner space is located at the point symmetrical with the first through hole 203 of the first separation plate 200. A second through hole 302 is formed in communication with the 100.

The second side plate 310 is coupled to the outer surface of the second separating plate 300 and the central portion of one surface facing the second support network 301 is formed with a circulation space 311 exposed in the groove shape and the other surface The pair of circulation holes 312-1 and 312-2 communicating with the circulation space 311 is formed.

The second side plate 310 has a second inflow hole 313 communicating with the other inner space 100 of the main body 10 at a position facing the second through hole 302, and the first Together with the first inlet hole 214 of the electrode unit 20 allows the inflow water to be treated from the outside into the main body 10 in the inflow path in both directions.

The second electrode 320 is disposed in the circulation space 311 of the second side plate 310 and extends to expose at least one power input protrusion 312 to the outside.

At this time, the treated water or the concentrated water treated in the main body 10 is discharged to the outside through one discharge path, and in the present invention, the discharge water may be discharged through the first electrode part 10.

In the case of the second electrode 320, unlike the first electrode 220, the discharge pipe does not have to pass, but may have a general disc structure. However, the second electrode 320 is not limited thereto. Similarly, the center portion may have a ring shape having a through hole.

The electrolyte solution circulates through the circulation space 311 through the pair of circulation holes 312-1 and 312-2. Here, the electrolyte of the second electrode part 30 is also the same as that of the electrolyte used in the first electrode part 20, and thus the detailed description and the functional mechanism thereof will be omitted.

Meanwhile, the capacitive deionization device of the present invention, as shown in FIG. 1, is a coupling part of the first separation plate 200 and the first side plate 210 and coupling of the second separation plate 300 and the second side plate 310. The electrolyte may include an airtight packing 50 attached to the site so that the electrolyte does not leak to the outside.

The coupling structure between the first separator plate 200 and the first side plate 210 and the coupling structure between the second separator plate 300 and the second side plate 310 may be variously implemented through known techniques. For convenience of the first separation plate 200 and the first side plate 210, the second separation plate 300 and the first through the body 10 as shown in FIG. It is preferable to have a structure that can be coupled to each other by having a plurality of coupling bolts 110 for connecting the two side plate 310 at a time and fastening both ends of the coupling bolt 110 through the coupling nut 120. Do.

On the other hand, the internal electrodes 40 are arranged at regular intervals in the direction perpendicular to the longitudinal direction of the main body 10 in the internal space 100 of the main body 10 and the first electrode portion 20 and the second electrode As the power is supplied from the unit 30, charges are charged to have alternating polarities to selectively adsorb or desorb ions with respect to the influent water introduced into the internal space 100.

That is, the capacitive deionization device of the present invention has a series structure in which a power source is connected to only the first electrode chamber 20 and the second electrode chamber 30 such that a potential due to a bipolar phenomenon is formed in the internal electrode 40. It has a bipolar connection structure of.

For example, when + power is supplied to the first electrode chamber 20 and-power is supplied to the second electrode chamber 30, each of the first electrode chamber 20 and the second electrode chamber 30 may be formed. Charge may be transferred to each of one side and the other internal space 100 of the main body 10 through the first support network 200 and the second support network 300, and the internal electrodes 40 arranged side by side in the internal space 100. Are alternately charged with negative and positive potentials so that positive and negative ions are adsorbed on the respective internal electrodes 40.

As described above, according to the capacitive deionization device of the present invention, since only electrical connection is required to the electrode chambers on both sides, that is, the first electrode part 20 and the second electrode part 30, all the positive electrodes are positive electrodes and the negative electrodes are negative electrodes. Compared with the prior art for connecting, the connection location can be significantly reduced, so that the module configuration can be simplified and the assembly can be easily performed. It will not increase productivity.

The internal electrode 40 is preferably composed of a graphite 400 and a pair of carbon electrodes 410 and 420 in contact with both surfaces of the graphite 400, as shown in FIG. As a result, it is possible to adsorb positive and negative ions, respectively, on both sides of one internal electrode 40.

Wherein the internal electrode 40 according to a preferred embodiment of the present invention in the graphite 400 between the pair of carbon electrodes 410, 420, the graphite slurry is immersed or applied to the porous mesh network Can be. That is, by attaching the carbon electrodes 410 and 420 to both surfaces in the state where the graphite slurry is immersed or applied to the mesh network, the carbon electrodes 410 and 420 and the graphite 400 are integrally formed to reduce the thickness of the electrodes. It is possible to increase the number of stacking of electrodes in the configuration of the unit module as compared to the conventional electrode.

In addition, the mesh network may be used as a reinforcing material to increase the mechanical strength by being disposed in the center of the internal electrode 40, and by immersing or applying a graphite slurry having excellent conductivity to such a mesh network, the current collector made of a conventional graphite material and Compared with the same conductivity, the mechanical strength and workability are improved, and the carbon electrodes 410 and 420 are attached to both surfaces in a slurry state to facilitate the formation of an integrated body.

Meanwhile, in the internal electrode 40, except for the other outermost internal electrode 40 adjacent to the second electrode part 30, the remaining internal electrode 40 has a flow hole 460 formed at the center thereof, and thus flows in both directions. Inflow water flowing into the path to be guided to the flow hole 460 formed in the center in the state where the ions are adsorbed from each of the internal electrode 40, and the treated water guided to the flow hole 460 is one It may be discharged to the outside of the main body 10 through the discharge pipe 202 along the discharge path of the.

In addition, in the case of one outermost inner electrode 40 adjacent to the first separator 200 in the inner electrode 40 and the other outermost inner electrode 40 adjacent to the second separator 300, respectively. It is arranged in close contact with the first support network 201 and the second support network 202 has a tight structure, from the circulation space (211, 311) of the first electrode portion 20 or the second electrode portion 30 The electrolyte may be prevented from flowing into the internal space 100 of the main body 10.

Although not shown in the drawing, the power supply unit includes a power supply line electrically connected to the first electrode 220 of the first electrode unit 20 and the second electrode 320 of the second electrode unit 30. It can be driven by an external operation signal to supply a power having a predetermined voltage and current.

In this case, the power supply is a DC power source, and the power supply unit may supply power having different polarities to the first electrode unit 20 and the second electrode unit 30, and supply power selectively supplied by an external control signal. You can reverse it. This is to selectively perform the ion adsorption process of the influent water and the regeneration process to desorb the adsorbed ions through one internal electrode (40).

7 is a view for explaining the operating state of the electrical storage deionizer of the present invention.

First, the power storage deionizer of the present invention has different polarities in the first electrode part 20 and the second electrode part 30 respectively configured on both sides of the main body 10 according to the supply of DC power from the power supply part. Power is applied, and power of the first electrode part 20 and the second electrode part 30 is transferred to the internal space 100 of the main body 10 through the first support network 201 and the second support network 301, respectively. Can be delivered.

Accordingly, when the internal spaces 100 have a predetermined interval, the internal electrodes 40 arranged side by side are electrically connected to each other in alternating polarity by a bipolar phenomenon, thereby being electrically connected in series, and having a positive charge. 40 is capable of adsorbing negative ions as a positive electrode, and on the contrary, the capacitive deionizer is operated so that the negatively charged internal electrode 40 can adsorb positive ions as a negative electrode.

On the other hand, the first electrode portion 20 and the second electrode portion 30 respectively coupled to both sides of the main body 10 are introduced in both directions to introduce the inflow water to be processed into the inner space 100 of the main body 10. In other words, the first through hole 203 and the first inlet hole 214 of the first electrode unit 20 and the second through hole 302 and the second inlet hole 313 of the second electrode unit 30 are constituted. It is.

In the capacitive deionization apparatus of the present invention, when the inflow water is introduced into the inner space 100 of the main body 10 through the aforementioned bidirectional inflow line in the symmetrical position, the bipolar inflow line is introduced into the bidirectional inflow line. The inflow water moves along the respective directions and moves to the space formed between the internal electrode 40 and the internal electrode 40 to face the adsorption surface of the internal electrode 40. Depending on the charge polarity, cations or anions present in the influent are adsorbed.

The treated water that has undergone the adsorption of ions is moved toward the first electrode portion 20 in which the discharge pipe 202 is formed along the flow hole 460 formed at the center of the internal electrode 40. Water is discharged to the outside through the discharge pipe 202 of the first electrode unit 20.

In addition, the capacitive deionization device of the present invention may selectively perform a regeneration process of desorption of ions adsorbed on the internal electrode 40. In the regeneration process, the polarity of the DC power supplied from the power supply unit is reversed. The first electrode unit 20 and the second electrode unit 30 respectively have a polarity opposite to the polarity in the adsorption process while the regeneration water is blocked inside the main body 10 while blocking the inflow of the influent into the bidirectional inlet line. To (100).

The regenerated water moves in the same manner as the inflow path described above. In this process, as the polarities of the charges are reversed, the positive and negative ions adsorbed in the adsorption process are desorbed together with the regenerated water. It is discharged as concentrated water through the discharge pipe 202.

Here, between the inner electrode 40 and the inner electrode 40, as the polarity of the charge is changed during the regeneration process, the ions desorbed to the adjacent inner electrode 40 may be resorbed. It may further include a resorption prevention means for preventing.

For example, the resorption prevention means may be composed of a mesh spacer 430 and an anion exchange membrane 440 and a cation exchange membrane 450 attached to one surface and the other surface of the mesh spacer 430, respectively. As shown in FIG. 1, the inner electrode 40 is disposed between the inner electrode 40 and the inner electrode 40, so that one inner electrode 40 adsorbs only one ion selected from anion or cation. On the other hand, it is possible to prevent the adsorption of ions detached from the other adjacent inner electrode 40 to prevent resorption.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

10 main body 20 first electrode portion
30: second electrode portion 40: internal electrode
100: internal space 200: first separator
201: first support network 202: discharge pipe
203: first through hole 210: first side plate
211: circulation space 212-1, 212-2: circulation hole
213: through hole 214: first inflow hole
220: first electrode 221: power input projection
300: second separation plate 301: second support network
302: second through hole 310: second side plate
311: circulation space 312-1, 312-2: circulation hole
313: second inlet hole 320: second electrode
321: power input projection

Claims (7)

A main body having an inner space and having openings formed at one side and the other side thereof;
A first electrode unit coupled to one opening of the main body and configured to supply one of + power and -power;
A second electrode unit coupled to the other opening of the main body and configured to supply power having a polarity opposite to that of the first electrode unit;
With respect to the inflow water which is arranged to be spaced apart from each other in a direction perpendicular to the longitudinal direction of the main body in the inner space and charged so as to have a polarity in which charges alternate with each other when power is supplied to the first and second electrode units. A plurality of internal electrodes that selectively adsorb or desorb ions; And
And a power supply unit supplying direct current power to the first electrode portion and the second electrode portion.
The first electrode unit,
A first support network made of a porous material is mounted at a central portion coupled to one side opening of the main body and facing one inner space of the main body, and a discharge pipe communicating with the one inner space while facing outward is mounted at the center of the first support net. A first separation plate having a first through hole communicating with the one inner space at one portion outside the central portion;
The central portion of one surface coupled to the outer side of the first separating plate and facing the first support network is formed with a circulation space exposed in a groove shape, and the other surface has a pair of circulation holes and the discharge pipe communicating with the circulation space. A first side plate having a through hole configured to pass through and exposed to the outside, and having a first inlet hole communicating with an inner space of one side of the main body at a position facing the first through hole;
A first electrode disposed in the circulation space of the first side plate and extending to expose at least one power input projection to the outside; And
Electrolytic solution for circulating the circulation space through the pair of circulation holes; Capacitive deionization device having a series structure to prevent the electrode reaction and scale generation.
delete The method of claim 1,
The second electrode unit,
A second support network made of a porous material is mounted at a central portion that is coupled to the other opening of the main body and faces the other inner space of the main body, and a portion that is point-symmetrical with the first through hole of the first separation plate communicates with the other inner space. A second separation plate having a second through hole formed therein;
The central portion of one surface coupled to the outer side of the second separation plate and facing the second support network is configured with a circulation space exposed in a groove shape, and the other surface is configured with a pair of circulation holes communicating with the circulation space. A second side plate configured to have a second inflow hole communicating with the other inner space of the main body at a position facing the two holes;
A second electrode disposed in the circulation space of the second side plate and extending to expose at least one power input projection to the outside; And
Electrolytic solution for circulating the circulation space through the pair of circulation holes; Capacitive deionization device having a series structure to prevent the electrode reaction and scale generation.
The method of claim 3, wherein
Capacitive deionization in series to prevent electrode reaction and scale generation in the inner electrode, except for the outermost inner electrode adjacent to the second electrode part, a flow hole is formed at the center portion. Device.
The method of claim 3, wherein
One outermost inner electrode adjacent to the first separator and the other outermost inner electrode adjacent to the second separator in the inner electrode are disposed in close contact with the first support network and the second support network, respectively. Capacitive deionizer with series structure to prevent electrode reaction and scale generation.
The method of claim 1,
The internal electrode,
Capacitive deionization device having a series structure for preventing electrode reaction and scale generation, characterized in that the graphite and a pair of carbon electrodes in contact with both surfaces of the graphite.
The method of claim 6,
In the internal space between the internal electrode and the internal electrode between the mesh spacer and the anion exchange membrane and the cation exchange membrane attached to the one and the other surface of the mesh spacer, respectively, characterized in that the storage of the series structure to prevent electrode reaction and scale generation Deionizer.

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