KR101609975B1 - Electrokinetic apparatus with detachable lattice cell and decontamination method using the same - Google Patents

Abstract

The present invention relates to a copper electroconductive device and a decontamination method using the same. More particularly, the present invention relates to an electrodevice having a detachable grid cell and a decontamination method using the same, wherein the grid cells 300, 300, 300, 300, 300, 301) is charged into the reaction vessel 100 from the outside (S20); A step (S50) of injecting a washing solution into the reaction vessel (100); A step S70 of removing the washing solution from the reaction vessel 100 after the sample 320 is decontaminated by the washing solution in the reaction vessel 100; And a step (S90) of moving the grid cells (300, 301) from the reaction vessel (100) to the outside (S90).

Description

TECHNICAL FIELD [0001] The present invention relates to a coaxial electric device having a grid cell capable of being detached and detachable, and a decontamination method using the same. [0002]

The present invention relates to a copper electroconductive device and a decontamination method using the same. More particularly, the present invention relates to a copper electroconductive device having a removable grid cell and a decontamination method using the same.

Most domestic nuclear power plants were built with solid sandstone as their base, and landfills were used when reclaiming streams and valleys through the nuclear facilities. In addition, radioactive material handling facilities such as nuclear power plants are constructed by pouring walls or floors into concrete.

These underlying soils, reclaimed soils, concrete walls or floors may be exposed to radioactive or radioactive material and contaminated during the lifetime of the radioactive facility. In addition, radioactive soils and concrete can also occur when nuclear facilities are dismantled. Therefore, in order to reduce the amount of radioactive waste generated, radioactive concrete and decontamination techniques for lowering the radioactive concentration so that the soil can be disposed of are necessary.

Furthermore, considering that the cost of dismantling wastes contaminated with radioactive materials that can be generated by dismantling nuclear facilities exceeds 30% of total dismantling costs, efficient management of dismantled wastes is an important factor in the economics of dismantling operations. .

In conventional commercial copper electroconductors for soil or powder concrete decontamination, grid cells are fixed at the center of the reaction vessel, and electrodes are installed on the left and right sides thereof. Then, the filter cloth is put in this grid cell, and the sample is put into this filter cloth.

However, if dozens of electrical devices are used to decontaminate large amounts of contaminants, a device for transferring samples to each of the electrical devices is needed. In addition, when the filter bag is removed after removing a part of the sample to remove the sample from the electroconductive device after decontamination, the filter bag is likely to be damaged during the operation because the filter bag is exposed to a high temperature acidic solution for a long time. Therefore, the conventional type of the electroconductive device consumes a lot of manpower, and the waste increases.

Korean Patent Application Publication No. 2003-0072053

SUMMARY OF THE INVENTION It is an object of the present invention to provide a copper electroplating apparatus capable of preventing labor from being consumed due to the transfer of a sample to a grid cell disposed in a reaction vessel for decontaminating a large amount of contaminants and a decontamination method using the same .

It is another object of the present invention to provide a copper electroconductive device and a decontamination method using the copper electroconductive device, which can prevent an increase in waste due to damage of a filter cloth in the process of extracting a sample from a reaction vessel after decontamination.

In order to solve the above-described problems, the present invention provides a cathode active material comprising: a cathode electrode (210) disposed in a reaction vessel (100); An anode electrode 220 disposed in the reaction vessel 100 so as to face the cathode electrode 210; And a grating cell (300, 301) on which a filter fabric (310) including a sample (320) for decontamination is mounted and which is disposed between the cathode electrode (210) and the anode electrode (300, 301) is removably attachable to and detachable from the reaction vessel (100) in a vertical direction.

The present invention also includes a step S20 of loading grid cells 300 and 301 into the reaction vessel 100 from outside, which is equipped with a filter 310 containing a sample 320 for decontamination; A step (S50) of injecting a washing solution into the reaction vessel (100); A step S70 of removing the washing solution from the reaction vessel 100 after the sample 320 is decontaminated by the washing solution in the reaction vessel 100; And a step (S90) of moving the grid cells (300, 301) from the reaction vessel (100) to the outside (S90).

As described above, according to the present invention, it is possible to reduce the attraction force and the waste by the grid cell which can be detachably attached to the reaction vessel.

Specifically, according to the present invention, which is designed to be able to attach and detach a lattice cell containing a sample as a whole, there is an effect of reducing manpower, improving laboratory environment, and reducing waste.

In addition, the fabrication of the lattice cell usable in an acidic solution and at a high temperature by the above-described construction can be applied to the production of other experimental vessels.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a coaxial device having removable grid cells according to an embodiment of the invention; FIG.
FIG. 2 is a plan view of a variant of a coaxial device having removable grid cells according to an embodiment of the invention shown in FIG. 1;
FIG. 3 is a plan view of a copper electroconductive device having removable grid cells according to another embodiment of the present invention.
4 is a side cross-sectional view of a coaxial electrical device having a removable grid cell according to another embodiment of the present invention shown in FIG.
5 is a flowchart showing the decontamination method using decontamination apparatus having a detachable grid cell according to an embodiment of the present invention.
6 is a flow chart after decontamination of a decontamination method using a copper electrochemical device having a detachable grid cell according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a copper electroconductive device and a decontamination method using the same according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a coaxial device having removable grid cells according to an embodiment of the invention; FIG.

As shown in FIG. 1, the apparatus for electrodeposition according to an embodiment of the present invention includes electrodes 210 and 220 and a grid cell 300 in a reaction vessel 100.

The reaction vessel 100 receives the lattice cell 300 and the electrodes 210 and 220. Although not shown, the washing liquid flows from the washing liquid reservoir through the washing agent supplying valve. After the radioactive material is removed from the contaminated soil or the sample of the powdered concrete, the influent washing liquid is discharged through the waste liquid discharge valve to the waste liquid storage tank (not shown). The reaction vessel 100 may further have a vertical tube for discharging the polluted gas generated therein.

The electrodes 210 and 220 are installed in the reaction vessel 100 so that the cathode electrode 210 and the anode electrode 220 face each other with the lattice cell 300 interposed therebetween. Specifically, the electrodes 210 and 220 are inserted into the groove of the electrode fixing portion 230 protruding from the inner surface of the reaction vessel 100.

The cathode electrode 210 and the anode electrode 220 are connected to a power source (not shown) via a wire to receive power. The voltage applied to the power supply unit may be 10 to 100 V DC, and the current density may be 1 to 200 mA / cm 2, preferably 4 to 200 mA / cm 2. When a voltage is applied to the electrodes 210 and 220, electrochemical cleaning processes such as electroosmosis, electromigration, and electrophoresis are performed to remove cationic The radioactive contaminant moves to the cathode electrode 210.

The materials of the electrodes 210 and 220 are determined according to the applied voltage and current density. The anode electrode 220 may be formed of a Dimensional Stable Anode (DSA), and the cathode electrode 210 may be formed of a Ti (Titanium) electrode. Particularly, the use of the insoluble electrode as the anode electrode 220 is because the titanium electrode or the stainless steel electrode melts when the voltage is applied by 50 V or more.

The lattice cell 300 is disposed between the cathode electrode 210 and the anode electrode 220. The filter cloth 310 is mounted inside the grid cell 300. The filter cloth 310 is filled with a specimen 320 for decontamination. The sample 320 is formed of soil or powder concrete contaminated with a heavy metal or a radioactive metal nuclide.

Particularly, the plastered concrete placed on the bottom of radioactive facilities is mostly covered with a polymer such as epoxy or urethane on the surface of the concrete. The radioactive concrete on the bottom of the facility with such polymer attached to the surface of the concrete, Not only is it more radioactive than concrete, but it is also difficult to decontaminate the entire concrete waste without separating / treating the polymer. Accordingly, it is preferable to heat and crush the radioactive concrete waste to which the polymer is adhered, and then sequentially wash it with water and a nitric acid solution to prepare the powdered concrete with the polymer from the radioactive concrete surface removed.

According to the embodiment of the present invention, the lattice cell 300 is formed in the reaction vessel 100 so as to be vertically detachable. Before the decontamination, the filter 300 is preliminarily charged in the grid cell 300, the sample 300 is placed in the filter cloth 310, To the reaction vessel (100). After the decontamination, the grid cell 300 can be lifted out of the reaction vessel 100 by using the hoist as a whole and can be transported to the outside, so that the filter cloth 310, which is generated in the process of removing the filter cloth 310 from the grid cell 300, It is possible to prevent damage to the battery 310.

FIG. 2 is a plan view of a variant of a coaxial device having removable grid cells according to an embodiment of the invention shown in FIG. 1; 2 is similar to the coaxial device shown in FIG. 1 except for the grid cell 301 and the support table 400, and thus a detailed description of the same parts will be omitted.

As can be seen in FIG. 2, a modification of the present invention includes electrodes 210 and 220, a grid cell 301, and a support 400 in a reaction vessel 100.

The reaction vessel 100 receives the lattice cell 301 and the electrodes 210 and 220, and the washing liquid is introduced. The influent washing liquid removes the radioactive material from the contaminated soil or the sample of the powder concrete, and then flows out to the waste liquid storage tank through the waste liquid discharge valve.

The electrodes 210 and 220 are installed in the reaction vessel 100 so that the cathode electrode 210 and the anode electrode 220 face each other with the lattice cell 301 interposed therebetween.

The cathode electrode 210 and the anode electrode 220 are connected to a power source (not shown) via a wire to receive power.

The grid cell 301 shown in FIG. 2 is formed so that the cathode electrode 210 of the grid cell can be widened in a wedge shape unlike the grid cell 300 in FIG. 1, To be removed from the grid cell 301. FIG. That is, although not shown in FIG. 2, the width of the lower end of the lattice cell 301 in the direction of the cathode electrode 210 is constant, but the width of the upper end is made larger.

The grid cell 301 is also disposed between the cathode electrode 210 and the anode electrode 220, like the grid cell 300 of FIG. A filter cloth 310 is mounted inside the grid cell 301. The filter cloth 310 is filled with a specimen 320 for decontamination. The sample 320 is formed of soil or powder concrete contaminated with a heavy metal or a radioactive metal nuclide.

The support 400 serves to support one side of the grid cell 301 in the direction of the cathode electrode 210 during the decontamination period. 2, the support table 400 is disposed between one side of the grid cell 301 and the support table fixing part 410 projecting from the reaction vessel 100. As shown in FIG.

FIG. 3 is a plan view of a coaxial electric machine having removable grid cells according to another embodiment of the present invention, and FIG. 4 is a plan view of a coaxial electric machine having removable grid cells according to another embodiment of the present invention shown in FIG. Fig.

3 and 4, the electro-mechanical apparatus according to another embodiment of the present invention includes the side member 500 and the bottom member 600 described above. Which is the same as the embodiment. Therefore, a detailed description of the same constitution will be omitted, and both side members 500 and the bottom member 600 will be mainly described.

Both side members 500 are disposed between the side of the grid cells 300 and 301 and the reaction vessel 100. Specifically, it is provided between both sides of the lattice cells 300 and 301 and the inner surface of the reaction container 100 facing the lattice cells 300 and 301. Both side members 500 are formed to seal between the lattice cells 300 and 301 and the reaction vessel 100. With this structure, the both side members 500 can block the flow of the solution between the cathode electrode 210 and the anode electrode 220.

Both side members 500 may be made of an acid-resistant material. Specifically, the solution used for soil or concrete decontamination contaminated with heavy metals or radionuclides has a temperature of about 70 ° C and a pH of about 0.5. Since the decontamination period takes about one month, it is preferable that the both side members 500 are made of a material which can withstand such an environment.

In addition, both side members 500 may be formed of a stretchable material. In addition, the shapes of both side members 500 may be formed in a tube shape. That is, in order to seal between the lattice cells 300 and 301 and the reaction vessel 100, the sealing effect can be improved by using a material and shape that shrinks when pushed between the lattice cells 300 and 301 and self- have. For example, a Teflon tube (manufactured by DuPont) or the like may be used for both side members 500.

The bottom member 600 is disposed between the lattice cells 300 and 301 and the reaction vessel 100. Specifically, the bottom member 600 is installed on the bottom of the reaction vessel 100, and is installed inside the reaction vessel 100 with the grid cells 300 and 301 being seated on the bottom member 600. Referring to FIG. 4, the receiving unit 800 may be directly fixed to the bottom surface of the reaction container 100, and the bottom member 600 may be disposed thereon. With this structure, the bottom member 600 can prevent the solution from flowing between the lattice cells 300 and 301 and the reaction vessel 100. On the other hand, the height of the lower surface member 600 can be about 1 cm, but it can be appropriately selected in consideration of the material and the support load.

The bottom member 600 may be made of an acid resistant material as described above with respect to the side members 500. In addition, the lower surface member 600 is preferably formed of a stretchable material because it receives a load of the grid cells 300 and 301 at the upper portion thereof. For example, the lower surface member 600 is preferably made of EPDM rubber (M-class rubber), perfluoro (perfluoro rubber), Kalrez rubber (manufactured by DuPont), or the like.

Referring to FIG. 4, the electrode fixing unit 230 serves to separate the cathode electrode 210 from the bottom of the reaction vessel 100. Generally, the metals dissolved from the soil and the concrete tend to precipitate as the pH of the cathode electrode 210 increases. The conventional electroconductive device has no space for accommodating the precipitate, so that the metals are deposited on the surface portion of the cathode electrode 210. As a result, the oxide was adsorbed on the surface of the cathode electrode 210 to interfere with the flow of electric current, thereby increasing the electric resistance and raising the temperature of the solution. However, according to the present invention, by providing the electrode fixing part 230 and positioning the cathode electrode 210 at a height of 20 cm or more from the bottom of the reaction vessel 100, a sufficient space is formed for accumulating the precipitate, Wear and damage of the electric parts can be prevented.

5 is a flowchart showing the decontamination method using decontamination apparatus having a detachable grid cell according to an embodiment of the present invention.

5, the decontamination method according to an embodiment of the present invention includes a lower member placement step S10, a grid cell charging step S20, a side member placement step S30, an electrode installation step S40, An injection step S50, and a decontamination step S60. Although not shown in FIG. 5, the step of installing the accumulator 700 may be further performed at any stage if it is before the decontamination step S60.

First, in the bottom member arranging step S10, the bottom member 600 is provided on the bottom of the reaction container 100. [

Next, in the lattice cell charging step S20, the grid cells 300 and 301 equipped with the filter cloth 310 containing the sample 320 for decontamination are charged from the outside into the reaction vessel 100. More specifically, the filter cloth 310 is placed in the grid cells 300 and 301 located outside the reaction vessel 100, and the contaminated soil or concrete powder is introduced into the filter cloth 310. Then, the entire grid cells 300 and 301 are moved and charged into the reaction vessel 100.

Next, both side members 500 are provided between the side surfaces of the grid cells 300 and 301 and the corresponding surface of the reaction container 100, in the both side member arranging step S30. In one embodiment of the present invention, both side members 500 of tubular shape are inserted into both side surfaces of the lattice cells 300 and 301, respectively. Accordingly, the flow of the solution between the cathode electrode 210 and the anode electrode 220 disposed in a later step can be blocked.

Next, in the electrode mounting step S40, the cathode electrode 210 and the anode electrode 220 are placed in the reaction vessel 100 with the grid cells 300 and 301 interposed therebetween.

Next, in the washing liquid injecting step (S50), the washing liquid capable of decontaminating the sample 320 is introduced into the reaction vessel 100 from the washing liquid reservoir through the washing liquid supply valve.

Finally, in the decontamination step S60, power is applied between the electrodes 210 and 220 so that current flows through the sample 320 in the grid cells 300 and 301. Thereby, the sample 320 is decontaminated by an electrokinetic purification process.

6 is a flow chart after decontamination of a decontamination method using a copper electrochemical device having a detachable grid cell according to an embodiment of the present invention.

6, the decontamination method according to an embodiment of the present invention includes a washing solution removing step S70, both side member removing steps S80, a grid cell moving step S90, and a sample separation step S100 do.

First, in the washing liquid removing step (S70), the power is turned off after the decontamination, and the washing liquid is taken out from the reaction vessel (100) to the waste liquid storage tank via the waste liquid discharge valve.

Next, in the both side member removing step S80, both side members 500 installed on the sides of the reaction vessel 100 and the grid cells 300 and 301 are removed.

Next, in the lattice cell moving step S90, the lattice cells 300 and 301 are moved out of the reaction vessel 100 to the outside. Specifically, the grid cells 300 and 301 are lifted from the reaction vessel 100 by means of a hoist or the like, and then moved to the outside. However, according to the embodiment, the order of the side member removing step S80 and the grid cell moving step S90 may be changed.

Finally, in the sample separation step (S100), the grid cells (300, 301) moved from the reaction vessel (100) are inverted and the sample (320) is poured out into a groundwater tank (not shown).

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: Reaction vessel 210: Cathode electrode
220: anode electrode 230: electrode fixing portion
300, 301: grid cell 310: filter cloth
320: sample 400: support
410: Support stand fixing part 500: Both side members
600: lower member 800:

Claims (19)

A cathode electrode 210 disposed in the reaction vessel 100;
An anode electrode 220 disposed in the reaction vessel 100 so as to face the cathode electrode 210; And
And a grid cell (300, 301) mounted with a filter cloth (310) including a sample (320) for decontamination and disposed between the cathode electrode (210) and the anode electrode (220)
The lattice cells 300 and 301 may be vertically attached to and detached from the reaction vessel 100,
Further comprising both side members (500) sealing between side surfaces of the grid cells (300, 301) and corresponding surfaces of the reaction vessel (100)
Wherein the side members (500) are made of a material having acid-resistance or stretchability. The method according to claim 1,
Further comprising a support (400) disposed on one side of the grid cell (301) so as to face the cathode electrode (210). delete delete delete A cathode electrode 210 disposed in the reaction vessel 100;
An anode electrode 220 disposed in the reaction vessel 100 so as to face the cathode electrode 210; And
And a grid cell (300, 301) mounted with a filter cloth (310) including a sample (320) for decontamination and disposed between the cathode electrode (210) and the anode electrode (220)
The lattice cells 300 and 301 may be vertically attached to and detached from the reaction vessel 100,
Further comprising a bottom member (600) for sealing between the bottom surface of the grid cells (300, 301) and the bottom of the reaction vessel (100)
Wherein the lower member (600) is made of a material having acid resistance or stretchability. delete delete A cathode electrode 210 disposed in the reaction vessel 100;
An anode electrode 220 disposed in the reaction vessel 100 so as to face the cathode electrode 210; And
And a grid cell (300, 301) mounted with a filter cloth (310) including a sample (320) for decontamination and disposed between the cathode electrode (210) and the anode electrode (220)
The lattice cells 300 and 301 may be vertically attached to and detached from the reaction vessel 100,
And an electrode fixing unit 230 for separating the bottom of the reaction vessel 100 from the cathode electrode 210 so that a precipitate of metals dissolved from the sample 320 is not adhered to the surface of the cathode electrode 210 Wherein the lattice cell has a removable lattice cell. (S20) in which the grid cells (300, 301) equipped with the filter cloth (310) containing the sample (320) for decontamination are charged from the outside into the reaction vessel (100);
(S30) of arranging both side members (500) sealing between side surfaces of the grid cells (300, 301) and corresponding surfaces of the reaction vessel (100);
The cathode electrode 210 and the anode electrode 220 are installed with the grid cells 300 and 301 interposed therebetween (S40);
A step (S50) of injecting a washing solution into the reaction vessel (100);
A step S70 of removing the washing solution from the reaction vessel 100 after the sample 320 is decontaminated by the washing solution in the reaction vessel 100; And
And a step (S90) of moving the grid cells (300, 301) from the reaction vessel (100) to the outside,
Wherein the both side members (500) are made of a material having acid resistance or stretchability. delete delete 11. The method of claim 10,
Further comprising a step (S80) of removing both side members (500) after the washing solution removing step (S70) and before or after the lattice cell moving step (S90) Decontamination method using electrokinetic device. Disposing the lower member 600 on the bottom of the reaction vessel 100 (S10);
(S20) in which the grid cells (300, 301) equipped with the filter cloth (310) containing the sample (320) for decontamination are charged from the outside into the reaction vessel (100);
A step (S50) of injecting a washing solution into the reaction vessel (100);
A step S70 of removing the washing solution from the reaction vessel 100 after the sample 320 is decontaminated by the washing solution in the reaction vessel 100; And
And a step (S90) of moving the grid cells (300, 301) from the reaction vessel (100) to the outside,
Wherein the lower member (600) is made of a material having acid resistance or stretchability. delete delete delete delete (S20) in which the grid cells (300, 301) equipped with the filter cloth (310) containing the sample (320) for decontamination are charged from the outside into the reaction vessel (100);
A step (S50) of injecting a washing solution into the reaction vessel (100);
A step S70 of removing the washing solution from the reaction vessel 100 after the sample 320 is decontaminated by the washing solution in the reaction vessel 100; And
And a step (S90) of moving the grid cells (300, 301) from the reaction vessel (100) to the outside,
Further comprising the step of disposing the electrode fixing part (230) so that the precipitates do not adhere to the cathode electrode (210) when the metals dissolved from the sample (320) form a precipitate Decontamination method using a copper electrochemical device having a lattice cell.

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