KR20110032722A - Water treatment system by electrosorption - Google Patents

Abstract

PURPOSE: An electro-adsorption drinking water processing apparatus is provided to simply remove bubbles without disassembling an absorption unit, and to effectively control the generation of bio-fouling. CONSTITUTION: An electro-adsorption drinking water processing apparatus comprises the following: a flow path forming network(430) producing a first flow path(W1), installed in between a positive and negative ion exchanging film(413) located in between two absorption electrodes(412) of two current collectors(411); a second flow path(W2) formed by the absorption electrodes; and a hollow gasket(414) for inserting the absorption electrodes and the flow path forming network.

Description

Electric adsorption water treatment device {WATER TREATMENT SYSTEM BY ELECTROSORPTION}

The present invention relates to an electrosorption water treatment device, and more particularly, to an electrosorption water treatment device capable of easily removing bubbles generated during a water treatment process.

Electrosorption type water treatment device is to purify the water by installing the cells of the anode and cathode in the water to adsorb the anions and cations dissolved in the water, and then desorb and remove them. This is used to obtain various kinds of water used in the laboratory or domestic water used in the home.

The electroabsorption water treatment apparatus includes a reactor for accommodating water therein, an adsorption unit installed in the reactor to adsorb ions in the water, and a rectifier for applying a DC voltage to the adsorption unit.

1 is an exploded perspective view showing an adsorption portion of the electrosorption water treatment apparatus according to the prior art, and FIG. 2 is a cross-sectional view of the assembled state showing a flow path formed in the adsorption portion of the electrosorption water treatment apparatus according to the prior art.

The adsorption part of the electrosorption type water treatment device according to the prior art is composed of a flow path forming network 30 formed between the anode cell 10, the cathode cell 20, and the two cells 10, 20 to form a flow path.

The anode cell 10 and the cathode cell 20 are composed of current collectors 11 and 21, adsorption electrodes 12 and 22, and ion exchange membranes 13 and 23, respectively. At this time, the adsorption electrodes 12 and 22 are fitted to the hollow gaskets 14 and 24, and the flow path forming film 30 is also assembled to the hollow gasket 40.

The adsorption part configured as described above includes the gaskets 14 and 24 of the current collectors 11 and 21, the adsorption electrodes 12 and 22, the ion exchange membranes 13 and 23, and the gaskets of the flow path forming network 30. The flow path P is formed through the 40 and the flow path forming network 30.

According to the adsorption unit of the electrosorption water treatment device configured as described above, the water flowing through the flow path forming network 30, the anion of the hardness component or ionic components contained in the water passes through the anion exchange membrane 13 to the anode adsorption electrode 12 ), And the cation is passed through the cation exchange membrane 23 and adsorbed to the cathode adsorption electrode 22.

On the other hand, the electroadsorption water treatment apparatus exhibits maximum efficiency when the current collector, the adsorption electrode, and the ion exchange membrane are completely wet with water and are in close contact with each other without bubbles.

However, when the water treatment apparatus is operated for a long time, contaminants such as scale components such as calcium ions or magnesium ions are generated in the flow path and the ion exchange membrane, and the voltage applied to the apparatus is increased due to the contaminants.

As such, when the voltage is high, electrolysis occurs in the adsorption electrode, but bubbles are generated in the current collector or between the current collector and the adsorption electrode, the adsorption electrode, and the ion exchange membrane. Bubbles generated at this time rapidly reduce the adsorption efficiency of ions flowing along the flow path.

However, according to the conventional electroadsorption water treatment apparatus configured as described above, since the flow path is formed only through the flow path forming network and no flow path is formed at the portion where bubbles are generated as described above, the method of removing bubbles before disassembling the adsorption unit. There was no.

Therefore, it was not possible to prevent the phenomenon that the performance of the water treatment device is degraded as the operation time increases. In addition, since the current collector, the adsorption electrode, and the ion exchange membrane constituting the adsorption part have a weak physical strength, many parts are damaged due to stress generated during decomposition when decomposing to remove bubbles. Therefore, it is difficult to disassemble or reassemble arbitrarily.

In addition, there is a problem that there is no water flow inside the current collector or between the current collector and the adsorption electrode, the adsorption electrode, and the ion exchange membrane, and water that has accumulated for a long time causes biofouling or the like, thereby decreasing the efficiency of the water treatment apparatus.

In addition, the current collector, the adsorption electrode, and the ion exchange membrane must be assembled in a state of completely wetted with water so that no bubbles are generated. However, when the assembly of the small capacity is possible, the process is difficult. have.

An object of the present invention is to devise to solve the above-described problems, it is possible to easily remove the bubbles caused by the electrolysis of the adsorption electrode without disassembling the adsorption unit, and to prevent the occurrence of contamination, such as bio fouling It is to provide an electrosorption water treatment device that can be.

In order to achieve the above object, the present invention is provided between two or more current collectors, the adsorption electrode of the positive and negative electrodes positioned between two neighboring current collectors, anion and cation exchange membrane, ion exchange membrane positioned between the two adsorption electrodes In the electrosorption water treatment apparatus including a flow path forming network forming a first flow path, a second flow path is formed through the adsorption electrode.

In order to achieve the above object, the present invention, two or more current collectors, the adsorption electrode of the positive electrode and the negative electrode positioned between the two neighboring current collector, the anion and cation exchange membrane located between the two adsorption electrodes, between the ion exchange membrane In the electrosorption type water treatment apparatus including a flow path forming network to be formed in the first flow path, the second flow path may be formed between the current collector and the adsorption electrode, and between the adsorption electrode and the ion exchange membrane.

According to the electro-adsorption water treatment device according to the present invention, by allowing water to flow in the bubble generation portion, it is possible to easily remove the bubbles generated without disassembling the adsorption portion, and also effective pollution generation such as bio fouling It can be suppressed. Therefore, the efficiency of the water treatment apparatus can be maintained, and since the decomposition of the adsorption unit is not necessary, the apparatus can be manufactured and used in a large capacity.

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

Figure 3 is a block diagram showing an electrosorption water treatment apparatus according to the present invention.

Electrosorption type water treatment apparatus according to the present invention, the reactor 100 for receiving water therein, the inlet pipe 200 for supplying water to the reactor 100, the discharge pipe 300 for discharging water from the reactor 100 ), The adsorption unit 400 installed in the reactor 100 to adsorb ions in the water, a rectifier 500 for applying a DC voltage to the adsorption unit 400, and a positive voltage to the adsorption unit 400. A positive voltage applying line 600, a negative voltage applying line 700 for applying a negative voltage to the adsorption unit 400, and a series connection line 800 for connecting the positive and negative sides of the adsorption unit 400 in series Include.

At this time, the adsorption unit 400 is composed of a positive electrode cell 410 that adsorbs negative ions in the water, and a negative electrode cell 420 that adsorbs the cations in the water. The anode cell 410 and the cathode cell 420 are alternately installed. In addition, a positive voltage applying line 600 is connected to the positive cell 410 to apply a positive voltage, and a negative voltage applying line 700 is connected to the negative cell 420 to apply a negative voltage.

Therefore, when a voltage is applied to the adsorption unit 400 through the rectifier 500, the positive or negative ions in the hardness and / or ionic components dissolved in the water are in an anion and a cation state. Respectively). By desorbing and removing the components adsorbed to each of the cells 410 and 420, water from which the hardness or ionic components are removed can be obtained.

4 is an exploded perspective view showing an adsorption unit of the electrosorption water treatment apparatus according to an embodiment of the present invention, and FIG. 5 is a view illustrating a second flow path formed through the adsorption unit of the electrosorption water treatment apparatus according to an embodiment of the present invention. It is sectional drawing of the assembled state. At this time, the sectional drawing of FIG. 5 is sectional drawing of the adsorption | suction part cut | disconnected diagonally.

Adsorption unit of the electrosorption water treatment apparatus according to an embodiment of the present invention, the positive electrode cell 410 to adsorb negative ions, the negative electrode cell 420 to adsorb the cations, and the flow path is installed between the two cells (410, 420) It is composed of a forming network (430).

The anode cell 410 is composed of a current collector 411, the adsorption electrode 412 and the anion exchange membrane 413, they are tightly assembled so as not to create a gap.

The current collector 411 of the positive electrode cell 410 receives an anode voltage from the rectifier 500 to apply an anode voltage to the adsorption electrode 412. The adsorption electrode 412 is entirely in surface contact with the adsorption electrode 412. Apply voltage evenly throughout. The current collector 411 is made of a conductive carbon plate.

At the edges of the current collector 411, first flow path formation holes 411a for forming the first flow path W1 and second flow path formation holes 411b for forming the second flow path W2 are formed, respectively. The target water to be treated is introduced through the first passage forming hole 411a, and water for removing bubbles is introduced through the second passage forming hole 411b.

The adsorption electrode 412 of the positive electrode cell 410 has a positive electrode by a voltage applied through the current collector 411, and the negative ions passing through the anion exchange membrane 413 are adsorbed.

The adsorption electrode 412 is made of a sheet woven from activated carbon fibers or activated carbon fiber non-woven sheet material can absorb the water and the communication of the absorbed water is possible.

The adsorption electrode 412 is assembled while being fitted to the hollow gasket 414. Therefore, the gasket 414 prevents the direct entry of water between the outside of the adsorption unit 400 and the adsorption electrode 412.

At the edge of the gasket 414, first flow path forming holes 414a for forming the first flow path and two second flow path forming holes 414b and 414c for forming the second flow path are formed, respectively. The first flow path formation hole 414a is formed at the same position as the first flow path formation hole 411a of the current collector 411.

One of the second channel forming holes 414b and 414c is formed at the same position as the second channel forming hole 411b of the current collector 411 and the other is formed at the opposite side thereof. The second flow path forming holes 414b and 414c are formed to be open toward the adsorption electrode 412 such that the adsorption electrode 412 and water communicate with each other. Accordingly, water passing through the second flow path forming hole 411b of the current collector 411 flows into the adsorption electrode 412 through one of the second flow path forming holes 414b and 414c of the gasket 414. It is discharged to the second flow path formation hole 413b formed in the anion exchange membrane 413 through the second flow path formation hole 414c formed on the opposite side.

The anion exchange membrane 413 passes the anions contained in the water flowing through the flow path forming network 430. That is, the anion exchange membrane 413 passes anions in water, ie, chlorine, sulfuric acid, nitrate, and the like.

The first channel forming hole 413a is formed at the same position as the first channel forming hole 414a of the gasket 414 in the anion exchange membrane 413, and the second channel forming hole 414c of the discharge side of the gasket 414 is formed. The second flow path forming hole 413b is formed at the same position as the above.

The cathode cell 420 is composed of a current collector 421, the adsorption electrode 422 and the cation exchange membrane 423, they are tightly assembled so as not to create a gap.

Here, the current collector 421, the gasket 424 provided on the outside of the adsorption electrode 422, and the cation exchange membrane 423 may include the first flow path forming holes 411a and 414a of the anode cell 410 described above. First flow path formation holes 421a, 424a, 423a and second flow path formation holes 421b, 424b and 424c which are the same as 413a and the second flow path formation holes 411b, 414b, 414c and 413b. Are respectively formed.

At this time, the first flow path formation holes 411a, 414a and 413a of the anode cell 410 and the first flow path formation holes 421a, 424a and 423a of the cathode cell 420 are located opposite to each other. . The second flow path forming holes 411b, 414b, 414c and 413b of the anode cell 410 and the second flow path forming holes 421b, 424b, 424c and 423b of the cathode cell 420 are formed. The flow path forming network 430 is positioned symmetrically.

The cation exchange membrane 423 of the cathode cell 420 passes through cations in the water, namely calcium, magnesium, sodium ions, and the like.

On the other hand, the flow of water may be started from either the positive electrode 410 or the negative electrode cell 420. 4 and 5 illustrate the flow of water from the anode cell 410 to the cathode cell 420.

The flow path forming network 430 is formed in a mesh shape to allow the flow of water to form a first flow path by itself.

The flow path forming network 430 is assembled in a state fitted to the hollow gasket 440. Therefore, the gasket 440 blocks direct entry of water between the outside of the adsorption unit 400 and the flow path forming network 430.

In the gasket 440, first flow path formation holes 440a and 440b through which water passing through the first flow path formation hole 413a of the anion exchange membrane 413 pass are formed at both edges. The first flow path forming holes 440a and 440b are formed to be open toward the flow path forming network 430 so as to communicate with the flow path forming network 430.

Hereinafter, the operation of the electrosorption water treatment apparatus according to an embodiment of the present invention will be described in detail with reference to FIGS. 3 to 6. 6 is a cross-sectional view showing a state in which bubbles generated in the adsorption electrode of the electrosorption water treatment apparatus according to an embodiment of the present invention is removed.

The water to be treated by the operation of the water pump is first introduced into the reactor 100 through the inlet pipe 200 formed at the bottom of the reactor 100 and then through the adsorption unit 400 installed in the reactor 100. The hardness component or ionic component contained therein is adsorbed and then discharged through the discharge pipe 300 formed on the upper portion of the reactor 100.

When the water to be treated is introduced into the reactor 100, the rectifier 500 operates to apply a DC voltage to the current collectors 411 and 421 of the adsorption unit 400. In this case, a positive voltage is applied to the current collector 411 of the positive electrode cell 410, and a negative voltage is applied to the current collector 421 of the negative electrode cell 420, respectively.

When voltage is applied to each of the current collectors 411 and 421 as described above, voltage is evenly applied to each of the adsorption electrodes 412 and 422 which are in surface contact with the current collectors 411 and 421.

In addition, the treated water introduced into the reactor 100 is introduced through the first and second flow path forming holes 411a and 411b formed in the current collector 411 of the positive electrode cell 410, respectively, and then the first flow path ( It flows along W1) and the second flow path W2 and is then discharged through the first and second flow path forming holes 421a and 421b formed in the current collector 421 of the negative electrode cell 420.

That is, the water flowing through the first flow path through hole 411a formed in the current collector 411 of the positive electrode cell 410 is connected to the gasket 414 of the adsorption electrode 411, the anion exchange membrane 413, and the flow path forming network ( The first flow path through holes 414a, 413a and 440a respectively formed in the gasket 440 of the 430 is supplied to the flow path forming network 430. Water supplied to the flow path forming network 430 flows across the flow path forming network 430, and subsequently forms the gasket 440, the cation exchange membrane 423, and the cathode cell 420 of the flow path forming network 430. It is sent to the current collector 421 of the cathode cell 420 through the first flow path through holes 440b, 423a and 424a respectively formed in the gasket 424 of the adsorption electrode 422, and then the first flow path through hole ( It is discharged into the reactor 100 through 421a.

At this time, the water to be treated includes a hardness component such as calcium carbonate and an ion component such as magnesium ion or calcium ion, and these components pass through the ion exchange membranes 413 and 423 during the flow through the flow path forming network 430. Adsorbed by the adsorption electrodes 412 and 422, respectively.

That is, anions in the water, ie chlorine, sulfuric acid, nitrate ions, etc. pass through the anion exchange membrane 413 and are adsorbed to the adsorption electrode 412 of the anode cell 410, the cations in the water, namely calcium, magnesium, sodium ions Etc., after passing through the cation exchange membrane 423, is adsorbed to the adsorption electrode 422 of the cathode cell 420.

Meanwhile, the water flowing through the second flow path forming hole 411b formed in the current collector 411 of the positive electrode cell 410 opens the second flow path forming hole 414b formed in the gasket 414 of the adsorption electrode 412. It is introduced into the adsorption electrode 412 through. Water flowing into the adsorption electrode 412 of the anode cell 410 flows through the interior of the adsorption electrode 412, and then flows through the second flow path forming hole 414c formed on the opposite side of the gasket 414. A second flow path formed in the gasket 440 of the flow path forming network 430, the cation exchange membrane 423, and the gasket 424 of the adsorption electrode 422, respectively. It is sent to the adsorption electrode 422 through the holes 440c, 423b and 424b. Water sent to the adsorption electrode 422 of the cathode cell 420 flows inside the adsorption electrode 422 similarly to the adsorption electrode 412 of the anode cell 410, and then is formed on the opposite edge of the gasket 424. It is sent to the current collector 421 of the cathode cell 420 through the flow path forming hole 424c, and then discharged into the reactor 100 through the second flow path forming hole 421b.

At this time, the water supplied to each of the adsorption electrodes 412 and 422 flows while discharging bubbles generated in the adsorption electrodes 412 and 422 to the outside, as shown in FIG. 6.

Since bubbles generated in the adsorption electrodes 412 and 422 are easily removed, the adhesion performance of the current collectors 411 and 421, the adsorption electrodes 412 and 422, and the ion exchange membranes 413 and 423 is maintained. Therefore, even if the water treatment apparatus according to the present invention is operated for a long time, not only the electrochemical performance is lowered, but also the physical strength can be maintained.

7 is a cross-sectional view showing a state in which bubbles generated between the current collector and the adsorption electrode, between the adsorption electrode and the ion exchange membrane of the electrosorption water treatment device according to another embodiment of the present invention is removed.

According to another exemplary embodiment of the present invention, the adsorption electrodes 412 and 422 are formed of an electrode formed of activated carbon powder in the form of a sheet or a conductive carbon composite electrode, so that water does not flow therethrough. Since the adsorption electrodes 412 and 422 are in close contact with the current collectors 411 and 421 and the ion exchange membranes 413 and 423, the adsorption electrodes 412 and 422 may be disposed between the current collectors 411 and 421 and the ion exchange membranes 413 and 423. There is no gap between them.

However, when the water treatment apparatus is operated for a long time, contaminants such as scale ions such as calcium ions and magnesium ions are generated in the flow path forming network 430 and the ion exchange membranes 413 and 423, and the contaminants are applied to the apparatus. The voltage becomes high.

When the voltage is high, the electrolysis occurs in the adsorption electrodes 412 and 422, but between the current collectors 411 and 421 and the adsorption electrodes 412 and 422, the adsorption electrodes 412 and 422. Bubbles are generated between and the ion exchange membranes 413 and 423. Bubbles generated at this time drastically reduce the adsorption efficiency of ions.

When bubbles are generated between the current collectors 411 and 421 and the adsorption electrodes 412 and 422 and between the adsorption electrodes 412 and 422 and the ion exchange membranes 413 and 423, the bubbles are generated. A gap is formed in the second flow path naturally. Accordingly, the water flowing along the second flow path of the adsorption unit 400 is disposed between the current collectors 411 and 421 and the adsorption electrodes 412 and 422, and the adsorption electrodes 412 and 422 and the ion exchange membrane 413. 423) it pushes the bubbles through.

Hereinafter, since the rest of the configuration and operation of the electrosorption water treatment apparatus according to another embodiment of the present invention is the same, a description thereof will be omitted.

8 is a graph showing the duration of water purification of the present invention electrosorption water treatment apparatus. The dotted line in the graph shows the constant duration of the electrosorption water treatment device according to the prior art (holding conductivity 770), and the solid line shows the constant duration of the electrosorption water treatment device according to the present invention. will be.

As shown in the graph of Figure 8, in the case of the electrosorption water treatment apparatus according to the present invention is located on the right side than the conventional water treatment apparatus, it can be seen that the purified water duration is longer.

That is, the electroabsorption water treatment device according to the present invention is formed to form a flow path to the bubble generation portion to remove the bubbles, water purification efficiency, that is, water treatment efficiency is superior to the conventional electrosorption water treatment device that the generated bubbles remain intact It can be seen.

As described above, preferred embodiments according to the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the specific embodiments, and the scope of the present invention is within the scope of the appended claims. You can change it within.

Figure 1 is an exploded perspective view showing the adsorption portion of the electrosorption water treatment apparatus according to the prior art.

Figure 2 is a cross-sectional view showing the state in which the flow path is formed in the adsorption portion of the electrosorption water treatment apparatus according to the prior art.

Figure 3 is a block diagram showing an electrosorption water treatment apparatus according to the present invention.

Figure 4 is an exploded perspective view showing the adsorption portion of the electrosorption water treatment apparatus according to an embodiment of the present invention.

Figure 5 is a cross-sectional view showing the state in which the second flow path is formed through the adsorption portion of the electrosuction water treatment apparatus according to an embodiment of the present invention.

6 is a cross-sectional view showing a state in which bubbles generated in the adsorption electrode of the electrosorption water treatment apparatus according to an embodiment of the present invention is removed.

7 is a cross-sectional view showing a state in which bubbles generated between the current collector and the adsorption electrode, between the adsorption electrode and the ion exchange membrane of the electrosorption water treatment apparatus according to another embodiment of the present invention is removed.

8 is a graph showing the water purification duration of the electrosorption water treatment apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100 reactor 200 inlet pipe

300: discharge pipe 400: adsorption portion

410: positive electrode cell 411: current collector

412: adsorption electrode 413: anion exchange membrane

414: gasket 420: cathode cell

421: current collector 422: adsorption electrode

423 cation exchange membrane 424 gasket

430: euro formation network 440: gasket

500: rectifier 600: positive voltage

700: negative voltage supply line 800: series connection line

Claims (8)

Two or more current collectors, adsorption electrodes of positive and negative electrodes positioned between two neighboring current collectors, anion and cation exchange membranes positioned between the two adsorption electrodes, and a flow path formed between the ion exchange membranes to form a first flow path In the electrosorption water treatment device comprising a network, An electrosorption type water treatment apparatus, characterized in that the second flow path is formed through the adsorption electrode. The method of claim 1, The adsorption electrode is electrosorption type water treatment apparatus, characterized in that the sheet woven from activated carbon fibers or activated carbon fiber nonwoven sheet. The method according to claim 1 or 2, The adsorption electrode and the flow path forming network is electrosorption type water treatment apparatus, characterized in that assembled to each fitted in a hollow gasket. The method of claim 3, wherein Second flow path forming holes are formed in the current collector, the gasket of the adsorption electrode, the ion exchange membrane, and the flow path forming network, respectively, and the second flow path formation holes are formed in the gasket of the adsorption electrode. Is formed on both sides of the gasket and is opened to the adsorption electrode, characterized in that the electrosuction water treatment apparatus. Two or more current collectors, adsorption electrodes of positive and negative electrodes positioned between two neighboring current collectors, anion and cation exchange membranes positioned between the two adsorption electrodes, and a flow path formed between the ion exchange membranes to form a first flow path In the electrosorption water treatment device comprising a network, And a second flow path is formed between the current collector and the adsorption electrode, and between the adsorption electrode and the ion exchange membrane. The method of claim 5, The adsorption electrode is an electrosorption type water treatment apparatus, characterized in that the electrode or a conductive carbon composite electrode formed of a sheet of activated carbon powder. The method according to claim 5 or 6, The adsorption electrode and the flow path forming network is electrosorption type water treatment apparatus, characterized in that assembled to each fitted in a hollow gasket. The method of claim 7, wherein In the current collector, the gasket of the adsorption electrode, the ion exchange membrane, and the gasket of the flow path forming network, a second flow path forming hole for forming the second flow path is formed, respectively, and a second flow path formation hole formed in the gasket of the adsorption electrode. Are respectively formed on both sides of the gasket and formed to open toward the adsorption electrode.

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