KR20190073332A - Water treating apparatus for saving energy and water treating method using the same - Google Patents

Abstract

The present invention relates to a water treatment apparatus for saving energy and a water treatment method using the same. More particularly, the present invention relates to a water treatment apparatus and a water treatment method capable of recovering and reusing energy generated by desorbing salts adsorbed on a storage desalination electrode module using an energy recovery device. To this end, the water treatment apparatus comprises: a power supply unit for applying voltage to a storage desalination electrode module; a storage desalination electrode module for adsorbing ions in influent water; and an energy recovery device for recovering energy generated upon desorption of ions adsorbed on the storage desalination electrode module.

Description

TECHNICAL FIELD [0001] The present invention relates to a water treatment apparatus for saving energy and a water treatment method using the same. BACKGROUND ART [0002]

The present invention relates to a water treatment apparatus for saving energy and a water treatment method using the water treatment apparatus. More particularly, the present invention relates to an energy recovery apparatus for recovering energy generated by desorbing a salt adsorbed on a storage type desalination electrode module using an energy recovery apparatus, And a water treatment method.

The capacitive deionization (CDI) electrode module is a technology for removing ionic materials in raw water by using ion adsorption and desorption reactions in an electric double layer (EDL) formed at the charged electrode interface. Specifically, when a voltage is applied within a potential range in which electrolysis of water does not occur, a certain amount of charge is charged to the electrode, and when the brine water containing ions is passed through the charged electrode, The charged ions move to each electrode by electrostatic force and are adsorbed on the electrode surface, and water passing through the electrode becomes desalinated water.

At this time, since the amount of ions adsorbed on the electrode is determined according to the capacitance of the used electrode, a porous carbon electrode (Carbon Electrode) having a large specific surface area is generally used as an electrode used for CDI.

On the other hand, when the adsorption capacity of the electrode is saturated, no more ions can be adsorbed, and the ions of the influent water are directly discharged into the effluent. At this time, in order to desorb the ions adsorbed to the electrode, if the electrodes are short-circuited or the opposite potential to the adsorption potential is applied to the electrode, the electrode loses charge or has an opposite charge, and the adsorbed ions are desorbed quickly, Reproduction is performed.

As described above, the CDI technology is known as an environmentally friendly desalination process because the operation is very simple because the adsorption and desorption are performed by changing only the potential of the electrode and the environment pollutants are not discharged during the desalination process.

The MCDI (Membrane Capacitive Deionization Device), which is an improved embodiment of the CDI, is characterized in that the ion exchange membrane is formed on the electrode surface to increase the selectivity of the adsorbed ions. However, the MCDI has a problem of increasing the overall cost of the CAPEX due to the use of expensive ion exchange membranes.

Also, in the conventional CDI or MCDI, in order to increase the removal efficiency of the salt, the flow path is generally designed to be as narrow as about 100 mu m, so that the fouling phenomenon is likely to occur due to the narrow flow path, There was a problem. In addition, it is difficult to manufacture a CDI module having a large-area serial structure due to the narrow flow path, and there is also a limit to increase the productivity.

In addition, the conventional desalination electrode module is manufactured by using a rectangular electrode. However, the quadrangular electrode does not desalinate at the corners, and corrosion is deteriorated, thereby deteriorating desalination efficiency.

In addition, the conventional storage type desalination electrode module consumes a large amount of energy costs because there is no way to recover the energy consumed in the adsorption and desorption processes.

Thus, a technology capable of recovering and reusing the energy consumed in the operation of the electrochemical desalination electrode module and the electrochemical desalination electrode module which can improve the removal efficiency of the ionic substance while minimizing the fouling phenomenon and increasing the throughput .

Korean Patent Publication No. 10-2015-0065300

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to develop a charge storage type desalination electrode module capable of improving the durability, minimizing the fouling phenomenon, And a water treatment apparatus for saving energy that can be recovered by reusing energy generated in the process of desorbing water during operation, and a water treatment method using the water treatment apparatus.

These and other objects and advantages of the present invention will become apparent from the following description of a preferred embodiment.

A water treatment apparatus according to an embodiment of the present invention includes: a power supply device for applying a voltage to a storage desalination electrode module; At least two or more of a plurality of ion exchange desalination electrode modules for adsorbing ions in influent water; And an energy recovery device that recovers the energy generated upon desorption of ions adsorbed on the charge storage type desalination electrode module.

The storage type desalination electrode module includes: a cylindrical housing having a hole formed at a central portion thereof; A pair of circular electrodes provided in the interior of the cylindrical housing and having holes in the center thereof; And a circular intermediate electrode spaced apart from the pair of circular electrodes and having a hole formed at the center thereof, wherein an active carbon layer is formed on both surfaces of the pair of circular electrodes and on both surfaces of the intermediate electrode, It is preferable that a cation exchange resin and an anion exchange resin are mixed and filled in the flow path between adjacent electrodes.

In addition, the power supply device may be connected to only one pair of circular electrodes of the storage type desalination electrode module to form an anode or a cathode, respectively, and the energy recovery device may include: a breaker for changing a direction of a current flowing in the storage desalination electrode module; A converter for recovering energy generated by desorption of salts adsorbed on the storage type desalination electrode module; And a capacitor for storing the recovered energy.

The plurality of the storage type desalination electrode modules are constituted by one set, and one set of the storage type desalination electrode modules can share one energy recovery device (30), and the intermediate electrode has an anode And a negative electrode is formed on the other surface.

It is preferable that the intermediate electrode has a plurality of electrodes, and the plurality of the electrolytic desalination electrode modules may be connected in series or in parallel.

Each of the storage type desalination electrode modules may be provided with an energy recovery device separately or two storage type desalination electrode modules may share one energy recovery device. When the total dissolved solid (TDS) of the influent water is 3000 ppm or more, And the plurality of the storage desalination electrode modules may be connected in parallel and operated when the total dissolved solid (TDS) of the influent water is less than 3000 ppm.

It is preferable that each of the storage type desalination electrode modules is disposed at 0.5 degree with respect to the horizontal direction, and the width of the flow path formed between adjacent electrodes is preferably 0.2 to 10 mm.

In another embodiment of the present invention, there is a water treatment method using at least two or more plural types of deaerated desalination electrode modules, including: a power supply step of applying a voltage to a storage desalination electrode module; An adsorption step in which the storage-type desalination electrode module adsorbs ions in the inflow water; And an energy recovering step of recovering energy generated upon desorption of the ions adsorbed on the storage type desalination electrode module.

Wherein the energy recovery step includes: a braking step of changing a direction of a current flowing to the charge storage type desalination electrode module; A transferring step of recovering the energy generated by desorption of the salts adsorbed on the storage type desalination electrode module and transferring the energy to the capacitor; And a storing step of storing the recovered energy in a capacitor.

At this time, the storage type desalination electrode module includes: a cylindrical housing having a hole at a central portion thereof; A pair of circular electrodes provided in the inside of the cylindrical housing and having holes in the center thereof; And a circular intermediate electrode spaced apart from the pair of circular electrodes and having a hole formed in the center thereof, and the cation exchange resin and the anion exchange resin are mixed and filled in the flow path between the adjacent electrodes.

The power supply device used in the power supply step may be connected to only a pair of circular electrodes of the charge storage type desalination electrode module to form an anode or a cathode.

The cation exchange resin and the anion exchange resin filled in the flow path between the electrodes may have a diametrically opposite concentration gradient and the plurality of storage desalination electrode modules are connected in series or in parallel.

In the case where the total dissolved solid (TDS) of the influent water is 3000 ppm or more, the plurality of the electrolytic desalination electrode modules are connected in series, and when the TDS (total dissolved solid) of the influent water is less than 3000 ppm, Are preferably connected in parallel and operated.

According to the present invention, it is possible to recover the energy generated during desorption of the adsorbed salt using the energy recovery device, and to reuse the energy generated in the adsorption process, thereby saving the energy consumed in operating the water treatment device I have.

In addition, the storage-type desalination electrode module has the effect of improving the durability of the storage-type desalination electrode module by preventing corrosion (oxidation of the electrode) using a circular electrode.

Further, by applying a potential only to a pair of circular electrodes located at the outermost inside of the housing of the storage type desalination electrode module, it is possible to operate without using a separate transformer as in the case of applying a potential to each electrode .

In addition, the capacitor-type desalination electrode module uses an electrode having a large diameter and can increase the size of the flow path, thereby minimizing the fouling phenomenon and increasing the throughput of the influent water.

In addition, it can operate in a large-size serial structure or a parallel structure, and it is possible to reduce CAPEX cost by not using a separate ion exchange membrane.

However, the effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a schematic view of a water treatment apparatus according to an embodiment of the present invention.
2 is a schematic view of an energy recovery apparatus used in a water treatment apparatus according to an embodiment of the present invention.
FIG. 3 is a schematic view of a water treatment apparatus according to an embodiment of the present invention, which operates two sets of CDI modules.
4 is a schematic view of a water treatment apparatus according to an embodiment of the present invention in which a plurality of CDI modules are connected in series.
5 is a schematic view of a water treatment apparatus according to an embodiment of the present invention in which a plurality of CDI modules are connected in parallel.
6 is a schematic view illustrating the interior of a CDI module used in a water treatment apparatus according to an embodiment of the present invention.
7 is a schematic view illustrating an operation of a CDI module used in a water treatment apparatus according to an embodiment of the present invention.
8 is a schematic view illustrating an operation of a CDI module used in a water treatment apparatus according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to embodiments and drawings of the present invention. It will be apparent to those skilled in the art that these embodiments are provided by way of illustration only for the purpose of more particularly illustrating the present invention and that the scope of the present invention is not limited by these embodiments .

Also, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains and, where contradictory, Will be given priority.

In order to clearly illustrate the claimed invention, parts not related to the description are omitted, and like reference numerals are used for like parts throughout the specification. And, when a section is referred to as "including " an element, it does not exclude other elements unless specifically stated to the contrary. In addition, "part" described in the specification means one unit or block performing a specific function.

In each step, the identification code (first, second, etc.) is used for convenience of explanation, the identification code does not describe the order of each step, and each step does not explicitly list a specific order in the context May be performed differently from the above-described sequence. That is, each of the steps may be performed in the same order as described, or may be performed substantially concurrently or in the reverse order.

1 is a schematic view of a water treatment apparatus 100 according to an embodiment of the present invention. Referring to FIG. 1, a water treatment apparatus 100 according to an embodiment of the present invention includes a power supply unit 10 for applying a voltage to a chargeable desalination electrode module 20; A condensate desalination electrode module (20) for adsorbing ions in the influent water; And an energy recovery device (30) for recovering the energy generated upon desorption of the ions adsorbed on the storage type desalination electrode module (20). The present invention provides an energy recovery device (30) capable of recovering and storing energy generated when desorbed ions are desorbed during operation of the storage type desalination electrode module (20), thereby reducing energy consumption by reusing stored energy Effect. Specifically, up to 80% of the energy generated in the desorption process of the storage type desalination electrode module 20 can be recovered and reused, thereby achieving a great energy saving effect.

In one embodiment, the energy recovery device (ERD) 30 may include a breaker 31 for changing the direction of the current flowing through the charge and discharge electrode module 20. (Hereinafter also referred to as CDI module) 20 will be briefly described. When the influent water flows into the electrolytic desalination electrode module 20, the positive ions contained in the influent water are discharged to the negative electrode and the negative ions are discharged to the positive electrode And is adsorbed. Once sufficiently adsorbed, the adsorbed ions are removed through a desorption process. In this case, if the direction of the current flowing through the battery module 20 is changed by using a breaker 31, that is, if the anode is changed to the cathode and the cathode is changed to the anode, So that the adsorbed ions are desorbed.

In one embodiment, the energy recovery device (ERD) 30 includes a converter 32 for recovering energy generated by desorption of salts adsorbed on the storage type desalination electrode module 20 . Specifically, the converter 32 is connected to an energy storage means such as a capacitor 33 described later, and serves to transfer energy between the capacitive desalination electrode module 20 and the capacitor 33 Can be performed. That is, the energy generated in the desorption process (discharging) of the storage type desalination electrode module 20 is recovered and transferred to the storage 33 so that the energy can be stored in the capacitor 33, To the storage desalination electrode module 20 for use in the adsorption process (charging) of the battery.

In one embodiment, the Energy Recovery Device (ERD) 30 may include a capacitor 33 for storing the recovered energy. Specifically, the capacitor 33 stores the energy generated in the desorption process of the storage type desalination electrode module 20 through the converter 32, and then stores it in the storage desalination electrode module 20, Can be used as an auxiliary power supply to re-supply the stored energy for the process to proceed. As the capacitor 33, various well-known storage means can be used, but it is preferable to use a large capacity electrochemical capacitor.

FIG. 3 is a schematic view of a water treatment apparatus 100 according to an embodiment of the present invention in which two CDI modules 20 are operated as one set. 3, the water treatment apparatus 100 according to an embodiment of the present invention includes two sets of the electrolytic desalination electrode modules 20, one set of the electrolytic desalination electrode module 20, The energy generated in one of the desorbing processes (discharging) is recovered and stored, and the stored energy can be used for the other adsorption process (charging).

4 is a schematic view of a water treatment apparatus 100 according to an embodiment of the present invention in which a plurality of CDI modules 20 are connected in series, and FIG. 5 is a schematic view of a water treatment apparatus 100 in which a plurality of CDI modules 20 are connected in parallel The present invention can connect a plurality of CDI modules 20 in series or in parallel according to an object to be achieved, wherein each CDI module The energy recovery device 30 may be provided in the power recovery unit 20 or the two CDI modules 20 may be designed to share one energy recovery device 30. [ In other words, if the total dissolved solid (TDS) of the influent water is large (3000 ppm or more), it can be connected in series, and if the TDS is small (less than 3000 ppm), it can be operated in parallel. At this time, in order to reduce the pressure loss of the feed flow, it is preferable that each CDI module 20 is disposed at 0.5 degree below the horizontal direction.

Hereinafter, the charge / discharge electrode module 20 of the present invention will be described in more detail with reference to FIGS. 6 to 8. FIG.

In one embodiment, the storage type desalination electrode module 20 includes: a cylindrical housing 21 having a hole at its center; A pair of circular electrodes (22) provided inside the cylindrical housing (21) and having holes at the center thereof; And a circular intermediate electrode 23 disposed at a predetermined distance between the pair of circular electrodes 22 and having a hole at the center thereof. In order to improve the processing capacity of the inflow water, the diameter of the intermediate electrode 23 disposed between the circular electrode 22 and the circular electrode 22 provided in the housing 21 is preferably 30 to 40 cm.

Most of the conventional CDI modules use rectangular electrodes and the size thereof is generally 10 x 10 cm. In this case, the throughput of the influent water is about 2.5 ton / day. In addition, the quadrangular electrode does not cause desalination reaction near the edge, but rather causes corrosion (oxidation of the electrode), which lowers desalination efficiency. However, it is easy to stack electrodes by using electrodes having a circular shape with a diameter of 30 to 40 cm, desalting action can be uniformly performed in the entire electrode, and the desalination efficiency per unit area can be improved. As a result, Lt; / RTI > In addition, the durability of the CDI module 20 can be improved by preventing the oxidation phenomenon occurring at the corners.

In one embodiment, the cylindrical housing 21 may be formed of a material such as unplasticized polyvinyl chloride (uPVC) in which a hole is formed in a central portion, but the present invention is not limited thereto. The holes formed in the central portion of the housing 21 are flow paths through which the influent water passes and the inflow water flows into one side of the housing 21 and flows out to the other side so that the ions in the inflow water are adsorbed to or detached from the circular electrode 22 and the intermediate electrode 23 This happens.

In one embodiment, the pair of circular electrodes 22 are formed in the central portion of the housing 21, and the intermediate electrode 23, which will be described later, An electrode disposed at an outermost position among a plurality of electrodes provided in the housing 21 so as to be disposed between the electrodes 22. The holes formed in the central portion are connected to the holes of the housing 21 to form the flow paths of the inflow water. The pair of circular electrodes 22 may use a porous carbon electrode having a large specific surface area, and an active carbon layer may be formed on the surfaces facing each other. In addition, an electrode unit may be formed on one side of the electrode unit so as to be connected to a power supply.

In one embodiment, the intermediate electrode 23 is arranged in a spaced-apart relationship between a pair of circular electrodes 22, and has a circular shape in which a hole is formed in the central portion, and basically has a pair of circular electrodes 22 The same electrode can be used. Unlike the pair of circular electrodes 22 located at the outermost position in the housing 21, the active carbon layer can be formed on both sides of the electrode, and the operation mode of the CDI module 20 (bipolar or mono The electrode unit may be formed so as to be connected to the power supply unit at one side according to the polarity method.

In one embodiment, the storage desalination electrode module 20 may be operated in a bipolar manner. The bipolar method is different from the monopolar method in which each electrode in the housing 21 is connected to a power supply unit so as to act as an anode or a cathode, Only one pair of circular electrodes 22 is connected to the power source device so that one side is applied with a positive potential (positive electrode) and the other side is applied with a negative potential (negative electrode) (Positive polarity), and the other surface is charged (negative polarity) at a negative potential. When the adsorption process and the desorption process are performed in the bipolar system, the circular electrode 22 disposed at the outermost inside of the housing 21 is charged to the opposite potential. That is, when the cathode acts as an anode in the adsorption process, it acts as a cathode in the desorption process, and acts as a cathode in the adsorption process and acts as an anode in the desorption process.

In one embodiment, the number of the intermediate electrodes 23 may be plural, and the number of the intermediate electrodes 23 may be adjusted according to the total voltage applied by the power source device. That is, the CDI module 20 preferably applies a voltage of 1.5 V or less so that each electrode is not oxidized. By adjusting the number of the intermediate electrodes 23 according to the total voltage applied to the CDI module 20, A voltage of 1.5 V or less may be applied so that the electrode is not oxidized. When operating in a bipolar manner, only the pair of circular electrodes 22 disposed at the outermost inside of the housing 21 may be provided with an electrode portion connected to the power source device, and a transformer for applying voltage to each electrode may not be used Which can save the overall equipment cost.

Meanwhile, the storage type desalination electrode module according to an embodiment of the present invention may be operated in a monopolar manner. In this case, it is preferable that the intermediate electrode 23 is also formed to be connected to the power supply unit.

FIGS. 7 and 8 are views schematically illustrating the operation of the CDI module 20 used in the water treatment apparatus 100 according to an embodiment of the present invention. 7 and 8, a cation exchange resin 24 and an anion exchange resin 25 may be mixed and filled in the flow path between the electrodes of the storage desalination electrode module 20.

Conventionally, the CDI module or the MCDI module is designed to have a narrow flow path of about 100 mu m in order to increase the salt removal efficiency. However, such a conventional CDI module or MCDI module is liable to cause a fouling phenomenon due to a narrow flow path, and the throughput is reduced. Also, since the entire system is stopped when one flow path is blocked due to the narrow flow path, it is difficult to manufacture a large-scale serial structure CDI module, and there is a limit to increase productivity such as large-capacity desalination.

Accordingly, in order to solve the fouling phenomenon and the decrease in the throughput while maintaining the salt removal efficiency, the present invention expands the flow path and replaces the cation exchange resin 24 and the anion exchange resin 25 in the flow path to serve as a bridge The electric resistance in the flow path can be reduced. That is, according to the present invention, as the flow path is enlarged, the fouling phenomenon is reduced and the amount of water to be treated is increased. At the same time, the cation exchange resin 24 and the anion exchange resin 25 filled in the flow path not only increase the salt removal efficiency, But also improves the salt removal rate.

The present invention uses an expensive ion exchange membrane (about 100,000 W / m ² ), which has been used to increase the salt removal efficiency in existing condensate desalination apparatus, by using a relatively low-cost ion exchange resin There is no need to use it, so CAPEX cost can be drastically reduced.

At this time, the width of the flow path formed between the electrodes may be variously designed as needed, but it is preferably designed to be 0.2 mm to 10 mm in order to reduce the fouling phenomenon and increase the number of treatments. If the width of the channel is less than 0.2 mm, fouling problems may occur as in the case of conventional capacitive desalination electrode modules. If the channel width exceeds 10 mm, the salt removal efficiency may be lowered.

In one embodiment, the cation exchange resin 24 and the anion exchange resin 25, which are filled in the flow path between the electrodes, may have a opposite concentration gradient. That is, a large number of the cation exchange resins 24 are distributed on the cathode side, and a large number of the anion exchange resins 25 are distributed on the anode side (see FIG. 8). This makes it possible to maximize the adsorption efficiency at each electrode and to allow the desorbed ions to be rapidly discharged by the ion exchange resin and the flow rate when the adsorbed ions are desorbed. Further, the cation exchange resin 24 and the anion exchange resin 25 may be evenly distributed in the central portion of the flow path.

Next, the water treatment method that can save energy is explained. For the sake of convenience of explanation, the water treatment apparatus 100 will be described, but the present invention is not limited thereto, and duplicate description will be omitted.

A water treatment method (S100) according to an embodiment of the present invention includes: a power supply step (S10) of applying voltage to a battery deaeration electrode module (20); An adsorption step (S20) in which the storage-type desalination electrode module (20) adsorbs ions in inflow water; And an energy recovering step (S30) for recovering the energy generated upon desorption of the ions adsorbed on the storage desalination electrode module (20). The present invention provides an energy recovery step (S30) for recovering and storing energy generated when desorbed ions are desorbed during operation of the storage type desalination electrode module (20), thereby reducing energy consumption by reusing stored energy . Specifically, up to 80% of the energy generated in the desorption process of the storage type desalination electrode module 20 can be recovered and reused, thereby achieving a great energy saving effect.

In one embodiment, the power supply step S10 is a step of applying a voltage to the storage desalination electrode module 20, and a known power supply device may be used. When a voltage is applied in the power supply step S10, both the bipolar method and the monopolar method can be applied. That is, a voltage may be applied only to the outermost electrode in the storage-type desalination electrode module 20, or a voltage may be applied to each electrode.

In one embodiment, the adsorption step (S20) is the step of the ion exchange adsorbing electrode module (20) adsorbing ions in the influent water, and applies the known CDI module adsorption principle. That is, when the CDI module 20 receives a voltage and each electrode functions as an anode or a cathode, the positive ions in the influent water are adsorbed to the negative electrode, and the negative ions are adsorbed to the positive electrode.

In one embodiment, the energy recovery step S30 may include a braking step S31 for changing the direction of the current flowing through the storage desalination electrode module 20. Specifically, when anions and cations are adsorbed to the positive and negative electrodes of the CDI module 20 through the adsorption step S20, and the adsorbed ions are sufficiently adsorbed, the adsorbed ions are subjected to a desorption step. In order to desorb the adsorbed ions, (20). That is, the anode is changed to the cathode and the cathode is changed to the anode.

In one embodiment, the energy recovery step S30 may include a transfer step S32 for recovering the energy generated by the desorption of the salts adsorbed on the storage desalination electrode module 20 and transferring the energy to the capacitor 33 have. To this end, a capacitor 32 may be connected to the energy storage means, such as a capacitor 33, to transfer energy between the capacitive desalination electrode module 20 and the capacitor 33. That is, the energy generated during the discharge (desorption process) of the CDI module 20 through the converter 32 is recovered and transferred to the capacitor 33 to be stored in the capacitor 33, The energy stored in the capacitor 33 can be transferred to the CDI module 20 for use.

In one embodiment, the energy recovery step S30 may include a storage step S33 of storing the recovered energy in the capacitor 33. [ For this purpose, a variety of well-known storage means can be provided, and preferably a large-capacity electrochemical capacitor can be provided. Also, after the storing step S33, it may include a reusing step S34 in which the stored energy is transferred to the CDI module 20 and used for charging the CDI module 20.

It is to be understood that the present invention is not limited to the above embodiments and various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention.

100: water treatment apparatus 10: power supply apparatus
20: Capacitive desalination electrode module 21: Housing
22: circular electrode 23: intermediate electrode
24: cation exchange resin 25: anion exchange resin
30: Energy recovery device 31: Breaker
32: converter 33: capacitor
S100: Water treatment method S10: Power supply step
S20: Adsorption step S30: Energy recovery step
S31: Breaking step S32: Delivery step
S33: Save step S34: Reuse step

Claims (13)

In the water treatment apparatus,
A power supply device for applying a voltage to the storage desalination electrode module;
At least two or more of a plurality of ion exchange desalination electrode modules for adsorbing ions in influent water; And
And an energy recovery device that recovers energy generated upon desorption of ions adsorbed to the storage type desalination electrode module,
The storage type desalination electrode module includes: a cylindrical housing having a hole formed at a central portion thereof; A pair of circular electrodes provided in the interior of the cylindrical housing and having holes in the center thereof; And a circular intermediate electrode spaced apart from the pair of circular electrodes and having a hole formed at the center thereof, wherein an active carbon layer is formed on both surfaces of the pair of circular electrodes and on both surfaces of the intermediate electrode, A cation exchange resin and an anion exchange resin are mixed and filled in the flow path between adjacent electrodes,
Wherein the power supply device is connected to only one pair of circular electrodes of the charge storage type desalination electrode module to form an anode or a cathode,
The energy recovery device includes: a breaker for changing a direction of a current flowing in the charge and discharge electrode module; A converter for recovering energy generated by desorption of salts adsorbed on the storage type desalination electrode module; And a capacitor for storing the recovered energy. The method according to claim 1,
Wherein the plurality of the electrolytic desalination electrode modules are constituted by one set of two,
Characterized in that a set of the charge and discharge electrode modules share one energy recovery device (30). The method according to claim 1,
Wherein the intermediate electrode has an anode formed on one surface thereof and a cathode formed on the other surface thereof. The method according to claim 1,
Wherein the intermediate electrode has a plurality of intermediate electrodes. The method according to claim 1,
Wherein the plurality of the electrolytic desalination electrode modules are connected in series or in parallel. 6. The method of claim 5,
Characterized in that each of the storage type desalination electrode modules is provided with an energy recovery device individually or the two storage type desalination electrode modules share one energy recovery device 6. The method of claim 5,
When the total dissolved solid (TDS) of the influent water is 3000 ppm or more, the plurality of the electrolytic desalination electrode modules are connected and operated in series,
A total dissolved solid (TDS) of the influent water is less than 3000 ppm, and the plurality of the electrolytic desalination electrode modules are connected and operated in parallel, The method according to claim 1,
Characterized in that each of the storage type desalination electrode modules is arranged at 0.5 degree below the horizontal direction, The method according to claim 1,
Characterized in that the width of the flow path formed between the adjacent electrodes is 0.2 to 10 mm, In the water treatment method using at least two or more plural types of storage type desalination electrode modules,
A power supplying step of applying a voltage to the storage desalination electrode module;
An adsorption step in which the storage-type desalination electrode module adsorbs ions in the inflow water; And
And an energy recovering step of recovering energy generated upon desorption of ions adsorbed to the storage type desalination electrode module,
Wherein the energy recovery step includes: a braking step of changing a direction of a current flowing to the charge storage type desalination electrode module; A transferring step of recovering the energy generated by desorption of the salts adsorbed on the storage type desalination electrode module and transferring the energy to the capacitor; And a storage step of storing the recovered energy in a capacitor,
The storage type desalination electrode module includes: a cylindrical housing having a hole formed at a central portion thereof; A pair of circular electrodes provided in the inside of the cylindrical housing and having holes in the center thereof; And a circular intermediate electrode spaced apart from the pair of circular electrodes and having a hole at the center thereof, wherein a cation exchange resin and an anion exchange resin are mixed and filled in a flow path between adjacent electrodes,
Wherein the power supply device used in the power supply step is connected only to a pair of circular electrodes of the storage desalination electrode module to form an anode or a cathode respectively. 11. The method of claim 10,
Wherein the cation exchange resin and the anion exchange resin which are filled in the flow path between the electrodes have a diametrically opposite concentration gradient. 11. The method of claim 10,
Wherein the plurality of the electrolytic desalination electrode modules are connected in series or in parallel. 13. The method of claim 12,
When the total dissolved solid (TDS) of the influent water is 3000 ppm or more, the plurality of the electrolytic desalination electrode modules are connected and operated in series,
Wherein when the total dissolved solid (TDS) of the influent water is less than 3000 ppm, the plurality of the electrolytic desalination electrode modules are connected in parallel and operated.

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