KR101889882B1 - Treatment Device for Radioactive Contaminated Water - Google Patents

Abstract

In accordance with one aspect of the present invention, there is provided an apparatus for treating a contaminated water of a radioactive substance in a river or a river, A pretreatment tank for forming a space for primary decontamination of the radioactive material by inputting a radioactive material adsorption medium, a radioactive material contamination containing the present treatment tank for purifying the contaminated water that has been firstly decontaminated in the pre- A water treatment apparatus is disclosed.

Description

[0001] The present invention relates to a treatment device for radioactive contaminated water,

The present invention relates to a radioactive material-contaminated water treatment apparatus, and more particularly, to a radioactive-material-contaminated water treatment apparatus for purifying water contaminated with radioactivity in a river,

Generally, various treatment methods and structures are installed in order to purify water flowing in rivers and streams.

Generally, the main pollutants contained in sewage etc. are particles and organic materials such as solid materials and nitrogen and phosphorus.

In order to treat these pollutants, it is generally necessary to first physically remove the suspended solids having good sedimentation property, then to secondarily treat the dissolved organic and organic solids by a biological method, and thirdly to perform physical, chemical and biological treatment Method is used to remove organic substances and nutrients that have not been removed in the secondary treatment.

On the other hand, the construction of nuclear power plants is increasing in Korea, as well as in neighboring countries such as Japan and China, for power generation.

Although these nuclear power plants are designed with safety in mind, they can not completely rule out the possibility of damage due to natural disasters that can not be considered by humans such as operational errors, earthquakes and tsunamis.

If the nuclear power plant is destroyed, the radioactive material is not restricted to the area but it can spread to the remote area such as the neighboring country by the monsoon wind. In the case of the country where the country is not wide, there is a risk that the whole country may be contaminated with the radioactive material .

When the radioactive material is spread, the radioactive material that has landed on the ground due to the rain can flow into the river or the reservoir through rainwater. In such a case, the radioactive material can not be efficiently removed There is a problem.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a radioactive material contaminated water treatment device capable of purifying radioactive material contaminated water when radioactive contamination occurs while performing a sewage treatment device function.

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

According to one aspect of the present invention, there is provided a method for forming a space for primary decontamination of a radioactive material by introducing a first radioactive material adsorption medium into a contaminated water of an incoming radioactive material, A pretreatment tank for treating a contaminated water containing radioactive materials, comprising: a pretreatment tank for treating the contaminated water;

In addition, according to another aspect of the present invention, there is provided an apparatus for treating a radioactive material, comprising: a main treatment tank for purifying contaminated water that is primarily decontaminated with a radioactive substance by a first radioactive substance adsorption medium; And a post-treatment tank for forming a space for secondary decontamination of the remaining radioactive material contained in the polluted water by injecting the second radioactive substance adsorption medium into the second radioactive material adsorption medium.

A first flow path for introducing the radioactive material contaminated water into the pretreatment tank, and a second flow path for guiding the contaminated water primarily decontaminated in the pretreatment tank to the treatment tank.

A third flow path for guiding the polluted water purified in the present treatment tank to the post treatment tank, and a fourth flow path for discharging the second decontaminated water in the post treatment tank.

The treatment tank is provided with a space filled with a filter medium for dewatering contaminants contained in the contaminated water, and a bottom surface of which is inclined upward toward a side from which water is introduced, And a main water channel installed at an upper side of the discharge side for discharging purified water to the outside.

The frame body includes a water collecting unit formed at an upper portion thereof and including a water gate for collecting the contaminated water flowing from the outside and flowing into the frame body, a collecting and collecting port formed at the lower part of the water gate, A first rectifying wall having a plurality of through holes formed therein for uniforming a passing flow rate of the sludge, a pocket for collecting the sludge that has been set up on the bottom surface of the point where the first rectifying wall is formed, And a drain valve for discharging the immersed sludge collected in the pockets installed in the drain pipe to the outside.

The first radioactive substance adsorption medium may be Illite.

The second radioactive substance adsorption medium may be Prussian Blue.

The second radioactive substance adsorption medium may be a zeolite.

The second radioactive substance adsorption medium may be Prussian blue-supported fiber.

According to the apparatus for treating a contaminated water of a radioactive material of the present invention, it is possible to purify radioactive contaminated water contaminated with radioactivity, thereby reducing the risk of radioactive contamination of the surrounding residents.

In addition, while usually performing a function of purifying common polluted water, the radioactive material contaminated water can be purified and treated when radioactive contamination occurs, thus increasing utility.

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

The foregoing summary, as well as the detailed description of the preferred embodiments of the present application set forth below, may be better understood when read in conjunction with the appended drawings. For the purpose of illustrating the invention, there are shown preferred embodiments in the figures. It should be understood, however, that this application is not limited to the precise arrangements and instrumentalities shown.
1 is a perspective view illustrating an apparatus for treating a contaminated water of a radioactive material according to an embodiment of the present invention;
FIG. 2 is a plan view showing a state in which the apparatus for treating a contaminated water of the radioactive material shown in FIG. 1 is operated in an emergency;
FIG. 3 is a graph showing a state in which the apparatus for treating a contaminated water of the radioactive material of FIG. 1 operates normally;
FIG. 4 is a view showing a state in which a radioactive material-contaminated water treatment apparatus of FIG. 1 is installed in a river or a river.
Figure 5 is a cross-sectional view of the pretreatment vessel of Figure 1;
Figure 6 is a cross-sectional view of the present treatment vessel of Figure 1;
FIG. 7 is a cross-sectional view of the post-treatment tank of FIG. 1;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In describing the present embodiment, the same designations and the same reference numerals are used for the same components, and further description thereof will be omitted.

1, the apparatus 100 for treating radioactive material contaminated water according to the present embodiment may include a pretreatment tank 110, a treatment tank 120, and a post treatment tank 130 as shown in FIG.

The present invention will be described by taking as an example the treatment of cesium (137-Cs) which has the greatest influence on the human body among various radioactive materials.

Cesium (137-Cs) is a radioactive material obtained during the fission process of uranium, and is an element that causes the collapse of the beta-ray and the strong gamma ray. It is an element artificially generated by nuclear tests and nuclear power generation.

Cesium is used to treat cancer of the uterus because it kills cancer cells with a strong gamma ray, but it is a deadly radioactive substance that can cause cancer if normal cells are exposed to radioactive cesium. When it is absorbed into the human body, it can not be discharged properly. It is mainly concentrated in muscles. It is a very harmful radioactive substance that causes leukemia in human body including leukemia and various cancers such as bone cancer and lung cancer.

Therefore, when the radioactive material such as cesium is mixed with rainwater or soil and flows into the river, the contamination of the drinking water source becomes serious, which is not only fatal to the human body using it but also pollutes ecosystem itself such as river habitat and surrounding animals and plants, .

Of course, the present invention is not limited to cesium treatment, but can also be applied to the treatment of other radioactive materials such as strontium and uranium.

The pretreatment tank 110 may be provided with a space for firstly decontaminating the radioactive material by introducing the first radioactive material adsorption medium into the inflowed radioactive material contaminated water.

In the present treatment tank 120, the first decontaminated water is introduced into the pretreatment tank 110, and the pollutants such as radioactive substances, various suspended substances and organic substances contained in the contaminated water are introduced into the treatment tank 110, , A component that precipitates or cleanses through biological reactions to purify.

The post-treatment tank 130 receives the polluted water purified in the present treatment tank 120, introduces the second radioactive substance adsorption medium into the contaminated water, A space for decontamination can be formed.

That is, the pretreatment tank 110 is a component for agglomerating the radioactive contaminants and the cohesive contaminants. The present treatment tank 120 is used to physically, chemically, The post-treatment tank 130 adsorbs and cleans the dissolved radioactive material that has not been precipitated and filtered in the pretreatment tank 110 and the present treatment tank 120, Lt; / RTI >

Of course, only one of the pre-treatment tank 110 and the post-treatment tank 130 may be installed or both may be installed at the same time depending on the installation environment and purpose.

At this time, in the description of the present invention, the radioactive material contaminated water means water contaminated with radioactive material or water in a situation where contamination of radioactive material is not known, although it is not known whether or not radioactive material is contaminated. The radioactive material contaminated water may include not only radioactive contaminants but also general particles and organic substances and common pollutants such as nitrogen and phosphorus.

1, a first flow path 140 for introducing the radioactive material contaminated water into the pre-treatment tank 110 and a second flow path 140 for introducing the first decontaminated water from the pre- The second flow path 150 may be provided.

The first bypass passage 160 may have a first end connected to the first flow path 140 and a second end connected to the second flow path 150 to bypass the pre-treatment tank 110.

A first valve 162 for opening and closing the first bypass passage 160 may be provided. When the first valve (162) is opened, the first bypass passage (160) is opened and the first flow passage (140) is closed so that all the water flowing into the first flow passage (140) And can flow to the bypass flow path 160. When the first valve (162) is closed, the first bypass flow path (160) is closed and the first flow path (140) is opened so that all the water flowing into the first flow path (140) And can be directed toward the bath 110.

At this time, the first flow path 140 may be connected to a water storage facility such as a river, a reservoir, or a reservoir, or to a water supply facility to receive polluted water.

2 and 3, when the first valve (162) is opened or closed, the contaminated radioactive material flowing into the first flow path (140) flows through the pretreatment tank (110) 120 or may be directly introduced into the treatment tank 120 by bypassing the pretreatment tank 110.

1, a third flow path 170 for guiding the polluted water purified in the present treatment tank 120 to the post treatment tank 130, And a fourth flow path 180 for discharging the water.

The second bypass passage 190 is connected to the third passage 170 at one end and is connected to the fourth passage 180 to bypass the post-treatment tank 130. The second bypass passage 190 bypasses the post- And a second valve 192 for opening and closing the path passage 190 may be provided.

When the second valve 192 is opened, the second bypass passage 190 is opened and the third flow passage 170 is closed so that all the water flowing into the third flow passage 170 flows into the second So that it can flow to the bypass flow path 190. When the second valve 192 is closed, the second bypass passage 190 is closed, the third passage 170 is opened, and the water flowing into the third passage 170 is exhausted And can be directed to the treatment tank 130.

At this time, the fourth flow path 180 may be connected to a water storage facility such as a river, a foundation, a reservoir, or water supply facilities to return the purified water back to the water supply source.

2 and 3, when the second valve 192 is opened or closed, the contaminated water of the radioactive material flows into the post-treatment tank 130 through the treatment tank 120, 130 by bypassing it.

3, the first valve 162 and the second valve 192 are opened at regular intervals so that the inflow water flows directly through the pre-treatment bath 110 and the post-treatment bath 130, 2, when the radioactive contaminated state occurs or there is a concern that radioactive contamination may occur, the contaminated water of the incoming radioactive material is introduced into the pretreatment tank 110, So that the flow can be adjusted to pass through the post-treatment tank 130.

As shown in FIG. 4, the apparatus 100 for treating radioactive-material-contaminated water includes a point where water flows into a water storage facility where water such as a reservoir or a water tank is stored, And may be installed in various places such as the point where the water is leaked from the facility and the water supply facility to supply water and water.

The pretreatment tank 110 is configured to perform a function of adsorbing and coagulating the radioactive material. A separate facility for introducing the first radioactive material adsorption medium may be further provided in the vicinity of the pretreatment tank 110. Of course, a separate facility for inputting the flocculant may be further provided. The coagulant may be added together with the first adsorbent for the first radioactive material, or may be introduced into the pretreatment tank 110 separately from the first adsorbent for the first radioactive material.

In the present embodiment, the first radioactive substance adsorption medium may be Illite.

It is the most abundant clay mineral with shale or sandstone, with kaolinite and ilite-smectite mixed layered minerals.

In recent years, various ceramic products using ilite have been developed and used like the loess or the elbow stones, and the field of use thereof has been expanding as a soil improving agent, a feed aid, a building material and a beauty material.

One of these clay minerals, Illyite, is very friendly to cesium (173-Cs), one of the radioactive elements. In particular, it is known that the adsorption capacity of cesium is stronger than other alkali ions having a small atomic radius at a low concentration.

It is anticipated that adsorption sites that selectively adsorb cesium at low concentrations in the adsorption sites of ilites (Sawhney, 1970, 1972; Wendling et al., 2004)

The main sites in which cesium can be adsorbed in Illight are planar sites, broken edges, and frayed edges at the top and bottom of the Il light crystal structure (Bolt et al., 1963; Brouwer et al., 1983; Evans et al., 1983).

Therefore, in the present invention, as an example of the first adsorbing material for the radioactive substance, an example is described in which one is used.

However, the present invention is not necessarily limited to this, and it is also possible to use another kind of adsorbent as the first radioactive substance adsorption medium.

As shown in FIG. 5, the pretreatment tank 110 is installed on the current side of the treatment tank 120, which will be described later, and can form a space for receiving the contaminated water of the radioactive material therein.

The first radioactive adsorbent may be injected into the inner space of the pretreatment tank 110. As described above, in this embodiment, the use of ilite as the first radioactive adsorbent will be described as an example.

The raw water is injected into the contaminated water of the radioactive material flowing into the pretreatment tank (110), and the radioactive material contained in the contaminated water of the radioactive material is adsorbed on the first light and is firstly decontaminated.

The light irradiated with the radioactive material may be precipitated under the water, or may be aggregated with each other.

In this embodiment, the coagulant for flocculation of ilite is administered as an example. However, the present invention is not necessarily limited thereto, and the coagulant may not be administered if necessary.

At this time, at least one of aluminum sulfate, iron sulfate, and ferric chloride may be applied as the coagulant to be administered. Of course, other types of coagulants may also be administered.

As described above, the contaminated water that is first decontaminated in the pretreatment tank 110 can be introduced into the treatment tank 120 through the second flow path 150. At this time, some of the first light inputted to the pretreatment tank 110 may be deposited on the bottom surface of the pretreatment tank 110, and a part of the first light may be introduced into the present treatment tank 120.

The present treatment tank 120 is a part for carrying out general purification. In this case, general purification refers to a purification operation performed in a normal time in which no radioactive contamination has occurred.

The treatment tank 120 may include a frame body 120a and a weir 128 as shown in FIG.

The frame 120a may have a structure in which two reaction vessels are symmetrically disposed on both sides of one center.

In this embodiment, only one of the two reaction vessels formed symmetrically will be described. However, the present invention is not limited to the one in which the reaction tank is symmetrically formed with respect to the center, and a single reaction tank can also be constructed.

The frame body 120a is formed with a space filled with a filter medium for immersing and removing the contaminants contained in the contaminated water by biological reaction and physical and chemical reactions, It can be formed so as to be inclined upward. At this time, the filter material to be filled may be a porous filter material.

The collecting passage 121 may be provided. The collecting passage 121 is formed at one side of the frame 120a to form a central passage to collect the polluted water flowing from the outside or the pretreatment vessel and form an outlet opening 127 at the bottom .

A water gate 122 may be provided on a side surface of the water collecting passage 121 to open and close the contaminated water flowing into the water collecting passage 121 to flow into the frame 120a.

The first rectifying wall 123a may be installed upright in the frame 120a at a predetermined distance from the water gate 122. A plurality of through holes may be formed in the first rectifying wall 123a so as to uniformly flow the passing water of the polluted water flowing through the collecting passage 121.

A pocket 125 may be formed on the bottom surface of the frame 120a at the lower end of the first rectifying wall 123a. The pockets 125 are for collecting and discharging the deposited sludge.

A drain valve 126 may be provided between the outlet port 127 and the pocket 125. The sludge collected in the pockets 125 can be discharged to the outlet opening 127 by opening and closing the drain valve 126.

The weir 128 may be installed at an upper side of the frame 120a on which water is discharged and may be installed to discharge purified water from the frame 120a to the outside of the frame 120a .

The second rectifying wall 123b may be installed upright on the lower side of the weir 128. The second rectifying wall 123b may be spaced apart from the bottom surface of the frame 120a by a predetermined distance so that water inside the frame 120a may pass therethrough.

Therefore, the contaminated water flowing into the collection channel 121 can be introduced into the space inside the frame 120a through the water gate 122 and the first rectifying wall 123a.

The polluted water flowing into the mold body 120a flows toward the weir 128. At this time, the polluted water flows to the weir 128 while passing through the filter material. In this process, the pollutants contained in the contaminated water pass through the filter material While being immersed or decomposed by physical, chemical, and biological reactions. In this process, after the radioactive contaminants such as illite are adsorbed, the agglomerated particles and the ordinary particles are deposited on the bottom surface of the frame body, and then the body is piled up in the pocket 125 on the inclination of the bottom surface of the frame body 120a , The sludge accumulated in the pocket 125 may be discharged through the outlet opening 127 through the drain valve 126.

On the other hand, the water passing through the filter material flows to the side of the weir 128. At this time, the water on the upper side of the frame 120a flows into one side of the weir 128 and flows into the main water channel 129, Is raised through the space at the lower end of the second rectifying wall 123b and flows to the other side of the weir 128 and flows into the main water passage 129 to be discharged to the outside of the main treatment tank 120 .

At this time, when the water below the frame 120a passes through the space at the lower end of the second rectifying wall 123b, the remaining sludge may be deposited.

The water introduced into the main water channel 129 may be introduced into the post-treatment tank 130 through the third flow path 170. The water may be supplied to the primary treatment tank 110 120), a small amount of soluble residual radioactive material may remain.

As shown in FIG. 7, the post-treatment tank 130 is configured to introduce the second radioactive material adsorption medium into the contaminated water subjected to the primary decontamination treatment and purification treatment from the present treatment tank 120, 2 < / RTI > radioactive material adsorption medium.

Therefore, a separate facility for introducing the second radioactive substance adsorption medium may be provided near the post-treatment tank 130, or a second radioactive substance adsorption medium or a second radioactive substance adsorption medium may be adsorbed in the post treatment tank 130 A component provided with a medium can be located.

The post-treatment tank 130 forms a space for receiving the water and the second radioactive-material adsorption medium from the main treatment tank 120. At this time, the second radioactive- The material adsorption medium may be at least one of zeolite, Prussian blue, and Prussian blue-bearing fibers.

Of course, in the present invention, other types of radioactive substance adsorption media other than those described above may be applied to the kind applied to the second radioactive substance adsorption medium.

Prussian blue (PB) is a commercially available blue dyeing sample, which is a material capable of selective adsorption to alkali cations and is known to be particularly effective in adsorbing and removing radioactive cesium.

Prussian blue has a uniform face-centered cubic lattice structure, of which there is a lattice space capable of adsorbing cations. In addition, among the alkali metal ions, ions having an ion radius suited to the size of the lattice structure of prussian blue show a large adsorption power. Among them, the ion radius of cesium is well suited to the lattice structure of prussian blue, Can be physically adsorbed.

In addition, the Prussian blue lattice structure has a hydrophilic property due to the water molecules being coordinated to each other. The hydrated cesium ions are easily adsorbed in the hydrophilic space inside the Prussian blue, and cesium ions are adsorbed in the inner space of Prussian blue When trapped, cesium can be removed by chemical adsorption by proton exchange of coordinated water molecule of Fe ^Ⅲ ion.

_{^{Fe Ⅲ -OH 2 + Cs + A}} - -> {Fe Ⅲ -OH} - Cs + + H + A -

Of course, a similar effect can be expected by using Prussian blue-supported fibers as the second radioactive substance adsorption medium.

Moreover, by using zeolite as the second radioactive substance adsorption medium, it is possible to adsorb the cesium in the contaminated water of the radioactive substance contained in the post-treatment tank 130.

In this manner, the radioactive contaminants in the contaminated radioactive material may be removed and discharged to the outside through the fourth channel 180.

At this time, the discharge point through the fourth flow path 180 may be a water supply source for receiving the radioactive material contaminated water.

It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. It is obvious to them. Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and the present invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.

100: Radioactive material contaminated water treatment apparatus 110: Pretreatment tank
120: main processing tank 120a:
121: By house collection 122: Water gate
123a: first rectifying wall 124: filter material filling space
125: Pocket 126: Drain valve
127: Outlet joint 128: Wear
129: main waterway 130: post-treatment tank
140: first flow path 150: second flow path
160: first bypass passage 170: third bypass passage
180: fourth passage 190: second bypass passage

Claims (10)

A pretreatment tank for introducing the first radioactive material adsorption medium into the inflowed radioactive material contaminated water to form a space for primary decontamination of the radioactive material;
The present invention includes a treatment tank for introducing firstly decontaminated water in the pretreatment tank and purifying the contaminated water,
In this treatment tank,
A space filled with a filter medium for precipitating and removing contaminants contained in the polluted water, the bottom surface of which is inclined upward toward a side from which the water is introduced;
A main water channel installed at an upper side of a side of the frame for discharging water and having a main water channel for discharging purified water to the outside of the frame body;
Wherein the radioactive-material-contaminated water treatment apparatus comprises: The present treatment tank for purifying the contaminated water in which the radioactive material is primarily decontaminated by the first radioactive substance adsorption medium;
And a post-treatment tank for introducing the polluted water purified in the treatment tank into the inflowing polluted water to form a space for secondary decontamination of the residual radioactive material contained in the polluted water by inputting the second radioactive material adsorption medium into the inflowed polluted water,
In this treatment tank,
A space filled with a filter medium for precipitating and removing contaminants contained in the polluted water, the bottom surface of which is inclined upward toward a side from which the water is introduced;
A main water channel installed at an upper side of a side of the frame for discharging water and having a main water channel for discharging purified water to the outside of the frame body;
Wherein the radioactive-material-contaminated water treatment apparatus comprises: The method according to claim 1,
A first flow path for introducing the radioactive material contaminated water into the pretreatment tank;
A second flow path for leading the first decontaminated water from the pre-treatment tank to the treatment tank;
Wherein the radioactive-material-contaminated water treatment apparatus comprises: 3. The method of claim 2,
A third flow path for guiding the polluted water purified in the present treatment tank to the post treatment tank;
A fourth flow path for discharging secondary decontaminated water from the post-treatment tank;
Wherein the radioactive-material-contaminated water treatment apparatus comprises: delete 3. The method according to claim 1 or 2,
The frame body,
A water collecting passage formed on the upper part of the water collecting part and having a water gate for collecting the contaminated water flowing from the outside and flowing the water into the frame,
A first rectifying wall having a plurality of through holes formed therein for uniforming the passing flow rate of the polluted water flowing through the collection and collection channel;
A pocket disposed at a bottom surface of the point where the first rectifying wall is formed, the pumped sludge collecting;
A drain valve for discharging immersed sludge collected in a pocket provided in the access opening so as to communicate with the pocket;
Wherein the radioactive-material-contaminated water treatment apparatus comprises: The method according to claim 1,
Wherein the first radioactive substance adsorption medium comprises Illite. 3. The method of claim 2,
Wherein the second radioactive substance adsorption medium comprises prussian blue. 3. The method of claim 2,
Wherein the second radioactive substance adsorption medium comprises zeolite. 3. The method of claim 2,
Wherein the second radioactive substance adsorption medium comprises Prussian blue-impregnated fibers.

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