KR20110068466A - Device for capacitive deionization - Google Patents

Abstract

PURPOSE: A helix celebration deionizing apparatus including a singular flow path for flowing diluted liquid and condensed liquid is provided to simplify the structure of the apparatus for reducing the manufacturing cost. CONSTITUTION: A helix celebration deionizing apparatus comprises the following: a supporter(10) in a hollow cylindrical shape; a celebration deionizing unit(20) including a negative electrode(21), a first electrode separation film(22), a positive electrode(23), and a second electrode separation film(24), installed in the supporter; a first cover plate(30) with an inlet hole(31) for flowing processing water through the first and second electrode separation films; and a second cover plate(40) with an outlet hole(41) for sealing an opening of a supporter, discharging diluted liquid or condensed liquid.

Description

Spiral Capacitive Deionizer {DEVICE FOR CAPACITIVE DEIONIZATION}

The present invention relates to a capacitive deionization device, and more particularly, to a spiral capacitive deionization device which can simplify the configuration of the device to improve the assembly of the unit cell and improve the mobility by reducing the volume of the device. will be.

As is well known, a capacitive deionization (CDI) device is a water treatment device that removes ions contained in water by applying a voltage to an electrode, and one unit cell constituting the electrode is a separator, an electrode, a current supply plate, It consists of a gasket and a support, which makes the assembly difficult and increases the volume of the unit cell.

In particular, the conventional capacitive deionization device has a disadvantage in that the productivity is reduced because the unit cells required for the processing capacity need to be assembled in order to increase the processing capacity for commercialization, and the mobility of the device is reduced because it occupies a larger volume. Have.

In addition, the stack of the conventional capacitive deionization apparatus may have a channeling phenomenon on the surface of the electrode in the stack depending on the location of the inflow and outflow of the water, thereby reducing the ion removal efficiency.

Conventional deionization apparatuses include spiral reverse osmosis membrane (REVERSE OSMOSIS) and spiral electrodeionization (ELECTRODIALYSIS) devices.

Here, the conventional spiral reverse osmosis membrane device has a disadvantage in that productivity is lowered because a high pressure of approximately 1000 PSI must be maintained in order to obtain dilution water from which ions are removed.

In addition, in the conventional spiral electric deionization apparatus, the water introduced into the stack is divided into dilution water and concentrated water around the membrane, and the outer portion of the spiral Cathode (or Anode) and the spiral portion of Anode (or Cathode) are membranes. Since the flow path of the cathode electrode and the anode electrode must be additionally provided before meeting with, the structure is complicated, which makes it difficult to manufacture the module.

An object of the present invention for solving the above problems is to provide a spiral capacitive deionization device that can simplify the configuration of the device to improve the assembly of the stack and to improve the mobility by reducing the volume of the device.

According to one aspect of the present invention, there is provided a spiral capacitive deionization device including a hollow cylindrical support having an accommodation space therein; A capacitive deion unit, in which a cathode electrode, a first electrode separator, an anode electrode, and a second electrode separator are stacked in this order to form a sheet, which is rolled in a spiral form and installed inside a receiving space of the support; A first cover plate coupled to seal an opening of one side of the support and having an inlet formed therethrough so that water flows through the first electrode separator and the second electrode separator of the storage deionization unit; Coupled to seal the tile-side opening of the support, wherein ions are separated from the water from the first electrode separator and the second electrode separator by applying a voltage across the cathode electrode and the anode electrode of the storage deionization unit. It is configured to include a second cover plate through which the outlet port is formed so as to discharge the dilution water or to discharge the concentrated water separated from the ions separated in the water.

Here, the cathode electrode, the first electrode separator, the anode electrode and the second electrode separator is preferably made of a flexible material so that the spiral shape can be rolled up in a stacked state.

In addition, the thickness of the cathode electrode and the anode electrode is made in the range of 0.2mm to 0.4mm, preferably made of a carbon sheet or aluminum sheet.

In addition, the thickness of the first electrode separator and the second electrode separator is preferably in the range of 0.1mm to 0.2mm.

In addition, the first electrode separator and the second electrode separator may be made of a porous material having fine pores, and the diameter of the fine pores may include 1 μm to 60 μm or less.

In addition, the support may be made of a PVC material.

Compared with the conventional electric deionization apparatus, the helical storage deionization apparatus of the present invention integrates the current supply plate and the electrode into one electrode plate, and has a single flow path through which dilution water and concentrated water flow with a time difference. By simplifying the manufacturing cost can be lowered, and the pressure inside the device can be lowered to reduce the operating cost.

In addition, the spiral capacitive deionization apparatus of the present invention is laminated by stacking the negative electrode, the first electrode separation plate, the positive electrode and the second electrode separation plate in the form of a sheet, and then rolled in a spiral to form an integral storage deionization unit of the device. It is easy to manufacture and has the effect of reducing the volume of the device.

In addition, the spiral capacitive deionization apparatus of the present invention is configured such that the first electrode separator and the second electrode separator are spirally rolled unevenly between the cathode electrode and the anode electrode, so that water flowing therethrough is applied to the surface of the cathode electrode and the anode electrode. The distribution is evenly distributed, thereby preventing the ion removal effect from being lowered by the channeling phenomenon.

In addition, in the case of the spiral capacitive deionization device of the present invention, when the water treatment capacity needs to be increased for commercialization, the conventional electric deionization device needs to increase the number of unit cells to increase the water treatment capacity, whereas the spiral capacitive deionization device is wound in a spiral shape. Increasing the number of turns of the ion unit has the effect of increasing the water treatment capacity more simply.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

1 is a side cross-sectional view of a helical storage deionization device according to an embodiment of the present invention, Figure 2 is a cross-sectional view taken along the line II-II of FIG.

Referring to FIGS. 1 and 2, the helical storage deionization device 1 of the present embodiment includes a support 10, a storage deionization unit 20, a first cover plate 30, and a second cover plate ( 40).

The support 10 is made of a hollow cylindrical shape having an accommodation space therein. In particular, it is preferable that it is made into a cylindrical shape so that the shape may be maintained in the state which accommodated the electrical storage deion unit 20 rolled in the spiral form inside.

In this embodiment, the support 10 is electrically insulating and illustrates that the power storage deion unit 20 is made of a PVC material having a predetermined strength so as to maintain a curled shape in a spiral form.

The capacitive deionization unit 20 is formed by stacking the cathode electrode 21, the first electrode separator 22, the anode electrode 23, and the second electrode separator 24 in order to form a sheet. It is rolled up to have a spiral shape.

Herein, the cathode electrode 21, the first electrode separator 22, the anode electrode 23, and the second electrode separator 23 are preferably made of a flexible material so as to be rolled in a spiral form in a stacked state.

On the other hand, the cathode electrode 21 and the anode electrode 23 is thin, the electricity is well communicated, the adsorption and desorption of the ions is preferably made of a material having elasticity so as not to be easily broken.

In this embodiment, the cathode electrode 21 and the anode electrode 23 are exemplified as being made of a carbon sheet or an aluminum sheet.

Here, the thickness of the carbon sheet and aluminum sheet forming the cathode electrode 21 and anode electrode 23 is preferably within the range of 0.2mm to 0.4mm.

When the thickness of the negative electrode and the positive electrode is less than 0.2mm, the strength of the electrode may be lowered, so that deformation may easily occur, and when the thickness of the negative electrode and the positive electrode is greater than 0.4mm, the overall volume may be increased.

The first electrode separator 22 and the second electrode separator 24 serve to separate the negative electrode 21 having the negative electrode property from the positive electrode 23 having the positive electrode property by applying a voltage thereto, and thereby It may be made of a porous material having fine pores so that the movement of ions is free.

The sheet of the porous material constituting the first electrode separation membrane 22 and the second electrode separation membrane 24 has a thickness within the range of 0.1 mm to 0.2 mm, and the diameter of the fine through holes is preferably within the range of 1 μm to 60 μm. Do.

If the thickness is less than 0.1 mm, there is a possibility that a short circuit between the positive electrode and the negative electrode occurs, and when the thickness is greater than 0.2 mm, the distance between the positive electrode and the negative electrode is far, and thus the influence of the positive electrode and the negative electrode may be reduced, which may lower the removal efficiency. have.

In addition, when the diameter of the micro-pores is less than 1 μm, smooth flow may occur when water flows through the electrode separation membrane, and a high pressure may be applied in the stack, and if the diameter exceeds 60 μm, the polarity may be shorted due to a short circuit between the positive electrode and the negative electrode. Can lose.

In the present embodiment, the first electrode separation membrane 22 and the second electrode separation membrane 24 exemplify the use of filter cloth sheet products such as SEFA, SUNMAP LC-T, etc., which are commercially used.

The first cover plate 30 is coupled to seal the lower opening of the support 10, and water flows through the first electrode separator 22 and the second electrode separator 24 of the storage deionization unit 20. Inlet 31 is formed to pass through.

In addition, the second cover plate 40 is coupled to seal the upper opening of the support 10, and applies a voltage at a time difference to the cathode electrode 21 and the anode electrode 23 of the electricity storage deion unit 20. The outlet 41 is formed to discharge the dilution water from which the ions are separated from the first electrode separation membrane 22 and the second electrode separation membrane 24 or to discharge the concentrated water from which the separated ions are concentrated.

As described above, the spiral capacitive deionization device 1 of the present embodiment is manufactured by simplifying the configuration of the device by forming the device with one electrode 21 and 23 in which the electric supply plate and the electrode are integrated as compared with the conventional electric deionization device. The unit price can be reduced.

In particular, in the spiral capacitive deionization device 1 of the present embodiment, the cathode electrode 21, the first electrode separator 22, the anode electrode 23, and the second electrode separator 24 are stacked in a sheet form. The volume of the device can be reduced by rolling in a spiral to form the integral capacitive deionization unit 20.

In addition, the first electrode separator 22 and the second electrode separator 24 are configured to be spirally wound in a spiral manner between the cathode electrode 21 and the anode electrode, so that water flowing therethrough may flow through the cathode electrode 21 and Since it is evenly distributed on the surface of the anode electrode 23, it is possible to prevent the ion removal effect from being lowered by the channeling phenomenon.

In addition, the spiral storage deionization apparatus 1 of the present embodiment has to increase the water treatment capacity by increasing the number of unit cells in the case of the conventional electric deionization apparatus when it is necessary to increase the water treatment capacity for commercialization. By increasing the number of turns of the electrical storage deion unit 20 can be more easily increased the water treatment capacity.

Hereinafter, the water treatment process using the spiral capacitive deionization apparatus of the present embodiment described above in more detail.

In the spiral capacitive deionization apparatus 1 according to the present embodiment, the first electrode separator in which water supplied into the support 10 through the inlet 31 is curled in a spiral form between the cathode electrode 21 and the anode electrode 23. The predetermined voltage is applied to the cathode electrode 21 and the anode electrode 23 repeatedly with a time difference in a state where the flow through the 22 and the second electrode separation membrane 24 is directed toward the outlet 41.

Therefore, in a state where voltage is applied to the cathode electrode 21 and the anode electrode 23, the cathode electrode 21 and the anode electrode 23 are interposed between the first electrode separation membrane 22 and the second electrode separation membrane 24. ) Becomes polarized, and the ions contained in the water flowing through the first electrode separator 22 and the second electrode separator 24 are adsorbed on the surface of the cathode electrode and the anode electrode, and the dilution water in which the ions are diluted is relatively discharged. Discharged to (41).

Meanwhile, in the state where the voltage applied to the cathode electrode 21 and the anode electrode 23 is released, the ions adsorbed on the surfaces of the cathode electrode 21 and the anode electrode 23 are separated from the first electrode separation membrane 22 and the first electrode. The concentrated water, which has been dropped into the water flowing through the two-electrode separator 24 and has relatively concentrated ions, is discharged toward the outlet 41.

Here, the helical power storage deionization apparatus 1 of the present embodiment can simplify the flow path structure by allowing the dilution water and the concentrated water to be discharged through the same flow path at a time difference, and the pressure inside the device for water treatment is less than about 1 PSI. Because it is operated, it can increase stability and reduce operating expenses.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but many variations and modifications may be made without departing from the spirit and scope of the invention. And it goes without saying that they belong to the scope of the present invention.

1 is a side cross-sectional view of a spiral capacitive deionization device according to an embodiment of the present invention.

FIG. 2 is a cross sectional view taken along the line II-II of FIG. 1. FIG.

<Description of Main Reference Signs>

1: helical power storage deionizer 10: support

20: power storage deion unit 21: cathode electrode

22: first electrode separation membrane 23: anode electrode

24: second electrode separator 30: first cover plate

31: inlet 40: second cover plate

41: outlet

Claims (7)

A hollow cylindrical support having an accommodation space therein; A capacitive deion unit, in which a cathode electrode, a first electrode separator, an anode electrode, and a second electrode separator are stacked in this order to form a sheet, which is rolled in a spiral form and installed inside a receiving space of the support; A first cover plate coupled to seal an opening of one side of the support and having an inlet formed therethrough so that water flows through the first electrode separator and the second electrode separator of the storage deionization unit; And The dilution is performed to seal the tile side opening of the support and separate the ions from the water from the first electrode separator and the second electrode separator by applying a voltage across the cathode and anode electrodes of the storage deionization unit. And a second cover plate through which an outlet port is formed so as to discharge the water or discharge the concentrated water in which the separated ions are concentrated in the water. In claim 1, The cathode electrode, the first electrode separator, the anode electrode and the second electrode separator, the storage deionization device made of a flexible material so that the spiral shape can be rolled up in a stacked state. In claim 1, The thickness of the cathode electrode and the anode electrode, Spiral power storage deionization device made in the range of 0.2mm to 0.4mm. 4. The method of claim 3, And said cathode electrode and said anode electrode are made of carbon sheet or aluminum sheet. In claim 1, The first electrode separator and the second electrode separator has a thickness of 0.1mm to 0.2mm spiral storage capacitive deionization device. The method of claim 5, The first electrode separator and the second electrode separator is made of a porous material having fine pores, The diameter of the micro-perforated spiral storage deionization device consisting of 1㎛ to 60㎛ range. In claim 1, The support is a spiral capacitive deionization device made of PVC material.

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