KR20170119053A - Capacitive deionization apparatus using electrification electric charging phenomenon - Google Patents

Abstract

The present invention improves the arrangement and stacking structure of the electrodes so as to minimize contact points for applying power between electrodes, thereby facilitating assembly, improving work efficiency, securing simplicity and diversity of an external power supply device for supplying power to the electrodes The present invention relates to a CDI apparatus using a charging principle capable of increasing current efficiency, in which two or more unit storage deionization modules in which a plurality of electrodes are stacked in a vertical direction are arranged side by side, In the CDI device including the power supply unit, each outermost unit storage deionization module is composed of one electrode, and the first electrode part and the two electrodes, to which power is supplied from the power supply part, are separated by the graphite connection part So that one electrode is interposed between the electrodes of the adjacent other unit storage deionization modules The second electrode portions to be disposed are alternately stacked so that electric charges are alternately charged between the electrodes facing each other in the upper, lower, left, and right directions.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a CDI

The present invention improves the arrangement and stacking structure of the electrodes so as to minimize contact points for applying power between electrodes, thereby facilitating assembly, improving work efficiency, securing simplicity and diversity of an external power supply device for supplying power to the electrodes , And a CDI device using a charging principle capable of increasing current efficiency.

In Korea, the shortage of water is serious and the dependence of available water resources is reduced. Therefore, it is possible to reuse highly treated wastewater such as wastewater treated wastewater for various purposes, secure drinking water of high quality through desalination of underground brine and seawater, And efforts are being made to secure clean water resources through the treatment of groundwater contaminated with ionic pollutants. To do this, it is necessary to remove not only organics in the water, but also suspended solids, viruses, dissolved solids, refractory materials, odor, and color.

In particular, the desalination or deionization technique for removing various ionic substances present in the water has been emphasized as an essential technology for development of advanced water treatment technology. The conventional desalination techniques that are currently being developed and used include conventional distillation, reverse osmosis (RO), electrodialysis (ED), and ion exchange (IEX) The processes have been technically verified and applied to practical desalination facilities.

However, these processes are increasingly demanding for new desalination technologies that are effective and reduce energy costs due to problems such as high energy cost in desalting process and deterioration of efficiency due to membrane contamination.

Due to the problems of the conventional desalination techniques, a new de-ionization technique (CDI, Capacitive Deionization) is proposed. The dehydrogenation dehydrogenation device has a small amount of current 1.2 volts) is supplied to the surface of the electrode to adsorb and remove ions on the surface of the electrically charged electrode. In the above-described capacitor deionization reactor, the anion moves to the positive electrode, and the positive ion moves to the negative electrode and is adsorbed.

Korean Patent Registration No. 10-1022257 discloses a technique in which a carbon electrode integrated with a current collector is laminated so that an anode and a cathode are alternately formed in each current collector, And the like.

However, the single-pole connection in which all the electrodes are alternately connected in parallel to one another in a plurality of collectors is complicated due to the complicated grounding structure, and it is not easy to work, and it is possible to induce an equipment failure such as an assembly error, there is a problem.

Also, for example, when operating such a device, all the electrodes are electrically connected in a single-pole parallel connection so that a voltage of 1.2 volts (V) is applied to each current collector, It is not easy to constantly maintain a low voltage on the electrode continuously. As a result of high current generation due to the parallel connection of a large number of electrodes, the cause of the failure of the power supply device And there is a problem in the stability of the device, such as lowering device efficiency and current efficiency.

In addition, despite the low voltage of 1.2 V, due to the use of high current, the specification of the accessories such as various power cables and control devices must be enlarged. Due to the processing capacity, .

As a method for solving this conventional technique, there has been proposed a method in which electrodes disposed in each of the storage deionization modules are connected in parallel and a plurality of storage deionization modules are connected in series to each other and connected to a power supply.

However, in this case, as shown in FIG. 1, in the plurality of electrodes stacked on the capacitor deionization module, the same polarity, for example, the positive electrode, the positive electrode and the negative electrode are collectively connected to each other through the power connection rod. The polarities of the electrodes must be spaced apart from each other by a certain distance. In addition, even in the case of minute flow of the connecting rod or the electrode in the spaced space, contact failure occurs.

In order to improve the unstable connection structure of the electrode, a conductor separating means for stable support and connection between the electrodes is provided in the spaced apart space. However, this also causes deterioration in durability due to repetitive ion adsorption / There is a problem that it is difficult to solve the problem.

Korean Patent Registration No. 10-1022257

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to improve the arrangement and lamination structure of electrodes to minimize the contact points for power supply in series connection of a plurality of capacitor deionization modules, So as to provide a CDI device using the principle of competition which can be economically advantageous.

A CDI apparatus using a charging principle according to the present invention is characterized in that two or more unit storage deionization modules in which a plurality of electrodes are stacked in a vertical direction are arranged side by side, In the CDI device including the power supply unit, each outermost unit storage deionization module is composed of one electrode, and the first electrode part and the two electrodes, to which power is supplied from the power supply part, are separated by the graphite connection part One of the electrodes is alternately stacked with the second electrode portion disposed between the adjacent electrodes of the other unit storage deionization module so that the charges are alternately charged between the electrodes facing each other to be.

As an example, when one or more inner unit storage deionization modules are disposed between the outermost unit storage deionization modules, the inner unit storage deionization module may be configured such that two electrodes are separated by a graphite connection and electrically connected One electrode is interposed between the electrodes of one adjacent unit storage deionization module and the other electrode is alternately stacked with a third electrode portion disposed to be interposed between the electrodes of the adjacent unit storage deionization module adjacent to each other to be.

As an example, the first electrode portion may be configured to extend outwardly from the graphite contact portion and be connected to the power source portion.

As an example, the second electrode unit and the third electrode unit may be configured such that the distance between the two electrodes connected to each other is longer than the distance between the two electrodes facing up and down.

As described above, the CDI device using the charging principle of the present invention can achieve stable power supply while minimizing the contact points between the electrodes, which are stacked with the capacitor deionization module, thereby simplifying the structure and facilitating the assembly As a result, there are economic advantages.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a stacked structure of a conventional capacitor electrodeionization module; FIG.
FIG. 2 is a schematic view showing an embodiment of a CDI apparatus using the charging principle of the present invention. FIG.
5A and 5B are perspective views illustrating a first electrode unit according to an embodiment of the present invention;
FIG. 5C is a perspective view illustrating a second electrode unit or a third electrode unit according to an embodiment of the present invention; FIG.
6 is a perspective view illustrating a distance between electrodes according to an embodiment of the present invention;

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

2 to 4 are schematic views showing an embodiment of a CDI apparatus using the charging principle of the present invention. 5A and 5B are perspective views illustrating a first electrode unit according to an embodiment of the present invention, and FIG. 5C is a perspective view illustrating a second electrode unit or a third electrode unit according to an embodiment of the present invention.

The CDI device using the charging principle of the present invention (hereinafter, referred to as a CDI device) is used for electrically connecting unit storage deionization modules 110 and 120 having a plurality of stacked electrodes, This paper presents the inter-electrode connection structure that can be solved.

Specifically, the CDI apparatus of the present invention can be applied to a structure in which two or more unit storage deionization modules 110 and 120 having a plurality of electrodes stacked in a vertical direction are arranged side by side, and the unit storage deionization modules 110, And a power supply unit 500 for applying power to the plurality of power supply units 120.

Each outermost unit storage deionization module (hereinafter, referred to as 'the outermost unit storage deionization module') 110 includes a first electrode unit 110 composed of one electrode as shown in FIG. 2, The first electrode unit 200 and the second electrode unit are electrically separated from each other by the graphite connection unit 310 and one electrode is electrically connected to the other electrode unit 110, (300) are alternately laminated.

The electrodes may be various electrodes according to the prior art, for example, a pair of carbon electrodes and a current collector made of a graphite material disposed between the carbon electrodes may be integrally formed. More preferably, The whole may be constituted by attaching carbon electrodes to both surfaces of the mesh net in a state in which the graphite slurry is immersed or applied.

In addition, although not shown in the drawing, an ion exchange membrane may be provided on the laminated electrode in order to prevent re-adsorption of the electrode, which may occur when the power source 500 is supplied with the reverse power according to the ion desorption process.

Meanwhile, in the CDI device of the present invention, the outermost unit storage deionization module 110 may be configured such that the power supplied from the power source unit 500 is supplied to the first electrode unit 200 located at the lowermost part or the uppermost part, So that charges can be alternately charged between the electrodes.

At this time, the first electrode unit 200 of the outermost unit storage deionization module 100 to which the power of the power unit 500 is supplied may be composed of at least one or more, preferably all of the first electrode unit 200, So that the power can be supplied.

That is, the outermost unit storage deionization module 110 located on one side and the outermost unit storage deionization module 110 located on the other side are disposed so that a potential due to the bipolar phenomenon can be formed between the electrodes facing each other in the upper, lower, The first electrode unit 200 of the second electrode 110 is constructed to have a bi-polar connection structure in which a power having opposite polarity is applied.

FIG. 2 shows an example in which two unit storage deionization modules are installed side by side in a CDI device. In this case, all of the two unit storage deionization modules correspond to the outermost unit storage deionization module 110.

In this embodiment, the positive and negative potentials applied by the power supply unit 500 are respectively connected to the outermost unit storage deionization module 110 located at one side and the first electrode unit 110 of the outermost unit storage deionization module 110 located at the other side, (200). ≪ / RTI >

5A and 5B, the first electrode unit 200 of the outermost unit storage deionization module 110 to which power is supplied from the power source unit 500 is connected to the outside of the graphite contact unit 210 So that the power connection line of the power source unit 500 can be connected or the connection hole 211 can be formed in the graphite contact unit 210 so that the power connection rod 600 can be fastened.

Each of the unit storage deionization modules including the outermost unit storage deionization module 110 forms a potential difference between the electrodes facing each other up or down or right and left from the electrode to which the positive or negative potential is applied so that the negative and positive potentials alternate So that ions can be adsorbed in the respective flow paths formed between the electrodes.

In the present invention, the electrodes constituting the third electrode unit 400 as well as the first electrode unit 200 and the second electrode unit 300, which will be described below, The holes 220, 320, and 420 allow the process water discharged from the flow path after the ion adsorption process to flow easily through the flow path holes 220, 320, and 420.

As a result, according to the present embodiment, if only the first electrode unit 200 disposed in the outermost unit storage deionization module 110 is electrically connected to the power source unit 500, all the unit storage deionization modules constituting the CDI unit The connection points can be drastically reduced as compared with the prior art in which all the positive electrodes are connected to the positive electrodes and the negative electrodes are connected to the negative electrodes, so that the module configuration can be simplified and the assembly can be facilitated .

By simplifying the module and facilitating assembly, it is possible not only to reduce the number of failures due to the assembly of the device and the connection failure of the electrode, but also to increase the productivity, and the manufacturing efficiency as well as the economical advantage can be obtained.

FIGS. 3 and 4 illustrate an arrangement in which three and four unit storage deionization modules are connected in parallel, wherein one or more inner unit storage deionization modules 120 ) Are arranged in a matrix.

In this case, a unit storage deionization module (hereinafter referred to as 'inner unit storage deionization module') 120 disposed between the outermost unit storage deionization modules 110 has two electrodes connected to the graphite connection part 410 And one electrode is interposed between the adjacent electrodes of the one unit storage deionization module and the other electrode is disposed between the adjacent electrodes of the other unit storage deionization module, (400) may be alternately stacked.

3, one electrode of the third electrode unit 400 is connected to the adjacent one of the outermost unit storage deionization modules 110 adjacent to each other, And the other electrode of the third electrode unit 400 is disposed between the adjacent electrodes of the outermost unit storage electrode deionization unit 110 on the other side.

4, one electrode of the third electrode unit 400 is connected to the adjacent one of the outermost unit storage deionization modules 110 adjacent to each other, Or between the electrodes of the adjacent one inner unit storage deionization module 120, and the other electrode of the third electrode unit 400 may be disposed between the adjacent outermost unit storage deionization module 110 or the other inner unit And is disposed between the electrodes of the capacitor deionization module 120.

The power supply by the power supply unit 500 may be performed by applying a power having a polarity opposite to that of the first electrode unit 200 of both outermost unit storage deionization modules 110, So that a charging action of positive or negative potential can be performed between the facing electrodes.

As described above, in the CDI apparatus according to the present invention, the two or more unit storage deionization modules are electrically connected in series, thereby minimizing the contact points for power supply. This is because, as described above, The power supply unit 500 may be provided with a medium voltage, a medium voltage, a high voltage, or a low voltage as needed, thereby ensuring diversity of selection of the power supply unit 500.

Also, it is easy to solve the electric load problem between the modules and the power connection part due to the high current and to apply the constant voltage to the electrodes as in the related art, so that the efficiency of the device can be improved.

When a power source is electrically connected to all the electrodes stacked in the prior art, for example, when a laminate structure (module) is formed by laminating 10 electrodes, a current of 1.5 V is supplied to each electrode, 20A is required, the power supply unit requires 1.5V and 200A specifications, whereas in the present invention, the 15V and 20A specifications are required in series connection of the unit storage deionization modules 110 and 120.

That is, when a conventional technology is applied, a power unit having specifications of a low voltage and a high current (1.5 V and 200 A) is required, so that the capacity of all the components increases according to the amount of high current and a constant voltage (1.5 V) is applied to each electrode in a low voltage high current specification There is a problem that efficiency is lowered due to difficulty in applying a constant voltage to each electrode in a conventional unit storage deionization module composed of several tens to several hundreds of electrodes.

In order to solve this problem, the lamination and connection structure of the CDI device of the present invention can use the middle-voltage and medium-current or high-voltage and low-current power supplies, It is possible to easily apply a constant voltage to each electrode, thereby improving the efficiency of the device.

6 is a perspective view illustrating a distance between electrodes according to an embodiment of the present invention.

According to a preferred embodiment of the present invention, the second electrode unit 300 and the third electrode unit 400 are arranged such that the separation distance a between two electrodes connected to each other as shown in FIG. It is possible to prevent the charging process acting between the electrodes disposed in the adjacent other unit deionization modules during the charging process between the electrodes facing up and down so as to be relatively longer than the separation distance (b) from the electrodes have.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the 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.

110: outermost unit storage deionization module
120: inner unit storage deionization module
200: first electrode portion
210: graphite contact portion
300: second electrode portion
310: Graphite connection
400: third electrode part
410: graphite connection
500:

Claims (4)

A CDI apparatus including two or more unit storage deionization modules in which a plurality of electrodes are stacked in a vertical direction, and a power unit for applying power to the unit storage deionization module,
Each unit cell deionization module located at the outermost side,
A first electrode unit including one electrode and being supplied with power from the power unit, and two electrodes electrically separated from each other by the graphite connection unit, wherein one electrode is interposed between the electrodes of the other unit storage deionization module And the second electrode portions to be arranged are alternately stacked so that charges are alternately charged between the electrodes facing each other vertically or horizontally.
The method according to claim 1,
When one or more inner unit storage deionization modules are disposed between the outermost unit storage deionization modules,
The inner unit storage deionization module comprises:
Two electrodes are electrically separated from each other by the graphite connecting portion, one electrode is interposed between the electrodes of the adjacent unit storage deionization module and the other electrode is interposed between the electrodes of the adjacent unit storage deionization module adjacent thereto And a third electrode portion arranged so as to be alternately stacked.
3. The method according to claim 1 or 2,
Wherein the first electrode unit comprises:
Wherein the graphite contact portion is configured to extend outwardly and connected to the power source portion.
3. The method of claim 2,
Wherein the second electrode portion and the third electrode portion are formed on the substrate,
And the distance between the two electrodes connected to each other is longer than the distance from the other electrode facing the upper and lower electrodes.

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