KR101829041B1 - Radon reducing system for groundwater using physical impact and aeration - Google Patents

Abstract

The present invention relates to a physical impact and acid radical type radon reducing apparatus of underground water, which comprises: a water supply means (10) for pumping and injecting underground water; a radon reduction housing (20) for mixing radon and air; and an acid radical means (30) for removing the radon. According to the present invention, the reduction efficiency of radon is maximized by allowing air and radon to be effectively in contact with each other in a limited space.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a radon reduction system for groundwater,

The present invention relates to a radon reduction device for groundwater, and more particularly, to a physical impact and a radon reduction device for acidic groundwater, which maximize efficiency of radon reduction by allowing effective contact between air and radon in a limited space.

Groundwater (groundwater) refers to water that fills or flows through gaps between rocks and underground strata.

The strata usually consist of a soil layer composed of general soil and sand, a weathered rock layer with a high permeability of groundwater, a soft rock layer with low permeability, and an ordinary rock and a rock layer. The rock aquifer underground water formed in the lower part of the soft rock layer is not influenced by contaminated groundwater from the soil layer or the weathered rock layer above the stratum bed, and maintains a clean water quality.

As the industrialization progresses in modern times, environmental pollution becomes more serious and soil pollution becomes serious, so that the groundwater that is formed by permeating the soil layer naturally also increases its contamination rate.

Moreover, in recent years, interest in clean drinking water has been rising due to the improvement of income level and the increase of outdoor leisure and travel, and the absolute amount of the disturbance is being supplied through rock groundwater.

However, the soil layer and the weathered rock layer can function as a part of the filtration from various anthropogenic pollutants flowing from the surface of the ground. However, when the time of natural purification is short and the soil layer or weathered layer is contaminated, There is a situation that does not exist.

In addition to the anthropogenic pollution, the amount of natural radioactive material in groundwater is likely to be high because more than half of Korea's geology is composed of crystalline rocks. Recent investigations have reported a number of groundwater levels exceeding 4,000 pCi / L, an alternative maximum contaminant level (AMCL) in the United States, for groundwater in the granite area of domestic rock groundwater.

Recent increases in interest in radon (Radon, Rn-222), increase in national income, and the increase in the number of people who enjoy affordable living, The frequency of groundwater contamination by radon is increasing.

Radon is a carcinogen that causes lung cancer and stomach cancer. When it enters the respiratory tract, it causes lung cancer and when it enters the digestive tract, it causes stomach cancer. If contaminated groundwater is used as drinking water, And even if the contaminated ground water is used as drinking water without using drinking water, the possibility of lung cancer due to secondary pollution of the indoor air can be increased.

Radon is a colorless, odorless, tasteless inert gas, one of the natural decay products of uranium (U-238). Radon is one of the radioactive isotopes with a half-life of about 3.8 days. It releases alpha particles during radioactive decay and is known to be harmful to human body. As mentioned above, the risk of human radon is known to be caused by inhalation of radon in the gaseous state, which is the largest cause of lung cancer. According to US EPA data, it is known that lung cancer is the next cause of smoking. Major regulatory trends for radon are 4,000 pCi / L in the United States, 8,100 pCi / L in Finland, and 13,500 pCi / L in Norway.

According to a press release reporting radon measurements, about 10% of domestic groundwater is contaminated by radon, and several thousands of picocurves of radon are detected per liter of groundwater not suitable for drinking water .

Since groundwater with a certain level of radon concentration is highly likely to cause lung cancer when it is drunk for a long time, it should be reduced to a certain concentration or lower. Therefore, pollutants including radon should be reduced to a certain concentration or less, including a method using a filter medium and a filter method.

As a conventional radon reduction technique, an injector or a ventilator is installed to induce contact between groundwater and air sprayed in a water tank or inside a housing, so that the radon is contained in the air and discharged. There is a problem that the reduction efficiency is low.

Patent Document 1 (JP-A-10-0496441) described below has a housing in which a drain hole is formed at a lower portion, an air inlet is formed at an upper side of the drain hole, and an air outlet is formed at the other side of the upper portion; A bellows pipe installed at a lower end of the filter support and vertically installed in the housing and connected to an air outlet; A rod connected to the filter support through the center of the bellows tube; A cylinder for raising / lowering the rod; And a timer for controlling the operation of the cylinder so that the cylinder moves up and down the rod at a predetermined time interval. This is not a filtration method using a filter material, and there is no backwash means and vibrator for prevention of clogging of the filter medium and washing.

Patent Document 2 (Japanese Patent Application Laid-Open No. 10-0911416) discloses a fuel cell system comprising: a housing in which groundwater falls from the inside; A rotating member installed in the housing and rotated by a dropping force of the groundwater to make groundwater into a droplet shape; A plurality of power transmitting members connected to both ends of the rotating member so as to transmit power, And a plurality of ventilating means coupled to one end of the power transmitting member in the housing to discharge the radon gas discharged from the water droplet together with the power transmitting member by the rotational force of the rotating member, However, since the groundwater drops, the radon drops together, which causes a problem of low efficiency.

Patent Registration No. 10-0496441 Patent Registration No. 10-0911416

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a physical impact and a radon abatement apparatus for acidic groundwater, which maximize the efficiency of abatement of radon by making effective contact between air and radon in a limited space. have.

The apparatus for reducing radon in a physical impact and an acidic groundwater according to the present invention comprises water supply means for pumping and discharging groundwater underground water; The groundwater is sprayed by the water supply means and the groundwater is stored, while the radon-containing gas is discharged to the outside, and the groundwater sprayed by the water supply means is dispersed by the physical impact, A radon reduction housing for allowing air to mix; A radon reducing housing for spraying air in the form of air bubbles below the water surface of the groundwater stored in the radon reducing housing to collide with the radon reducing housing, Wherein the radon reduction housing includes an exhaust pipe having an exhaust port formed at an upper end thereof and a reflector extending at a bottom portion of the exhaust pipe to a larger area than the exhaust pipe, And a spray nozzle installed below the reflector in the radon reduction housing for receiving groundwater pumped from the underground water and spraying the water toward the reflector to cause the groundwater to collide against the reflector to induce the separation of the radon contained in the groundwater, The air diffuser blows air A supply pipe for supplying air blown by the blower, a distribution pipe installed to be submerged in the groundwater in the radon reduction housing and connected to the supply pipe to distribute the air, And a ventilating nozzle arranged to radiate bubbles to the falling groundwater after colliding with the reflector of the radon reducing housing to recover radon and exhaust the radon.

According to the physical impact and the radon reduction apparatus of the acid type groundwater according to the present invention, groundwater is collided with the radon reduction housing to atomize the radon, thereby activating the contact between the radon and the air and also providing air in the form of bubbles, By maximizing it, it is possible to secure pure groundwaters from which radon has been removed, thus providing groundwater resources for various purposes.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing the overall structure of a radon reduction device for physical impact and acid-type groundwater according to the present invention; FIG.
FIG. 2 is a view showing an application of an exhaust fan to a radon reduction device of physical impact and acid-type groundwater according to the present invention. FIG.
FIG. 3 is a diagram showing an example in which the physical impact and the radon reduction apparatus of the acid type groundwater are applied in two stages according to the present invention. FIG.
FIG. 4 is a general view showing a physical impact according to the present invention and a radon reduction device of acid-type groundwater, applied together with a tank.
5 shows an example of applying an ultrasonic atomizer to a radon reduction device of a physical impact and an acidic groundwater according to the present invention.
6 is a view showing an example in which a physical impact according to the present invention and a radon reduction device of acid-type groundwater are used for small households.

As shown in FIG. 1, the physical impact and the acidic groundwater radon reduction apparatus 100 according to the present invention include a water supply means 10 for supplying groundwater containing radon, a groundwater (20) for inducing the separation of radon contained in the groundwater and discharging the radon-containing gas separated from the groundwater, an air diffuser (20) for generating air bubbles by blowing air into the groundwater, ) Means (30).

The water supply means 10 includes a water supply pump 11 for pumping groundwater in the underground water well 1, a water supply pipe 12 connected to the water supply pump 11 for supplying groundwater pumped by the water supply pump 11, And a plurality of spray nozzles 13 for spraying the ground water supplied through the radon 12 in the radon reduction housing 20.

The water supply pipe 12 is piped from the inside of the heart 1 to the inside of the radon reduction housing 20 and is preferably installed so that its center is coincident with the center of the radon reduction housing 20, Thereby making uniform radon reduction possible.

The injection nozzle 13 is connected to the end of the water supply pipe 12 and is configured to inject groundwater supplied through the water supply pipe 12 toward the inner wall surface of the reflection shade 11 of the radon reduction housing 20, For example, a radial type in which the injection angle is inclined upwards so as to maintain a right angle with the reflector 22, and a plurality of the radial types are arranged at regular intervals along the circumferential direction. Of course, the spraying nozzle 13 is capable of all the structures under the premise that the groundwater is made to collide with the reflector 22 without being injected through the exhaust pipe 21 of the radon reduction housing 20. [

The radon reduction housing 20 has a tubular structure having a space for separating and discharging the radon contained in the groundwater, and has an exhaust pipe 21 having an exhaust port for exhausting the radon-containing gas at the upper end thereof, And a reflector 22 extending in a larger area than the exhaust pipe 21. The radon reduction housing 20 can be both open and closed at the bottom in this structure, and the bottom of the radon reduction housing 20 is open at the bottom so that it operates with a separate tank, which will be described in detail below.

Further, a separate exhaust fan 25 (shown in Fig. 2) may be configured for smooth exhausting of the radon-containing gas.

The exhaust pipe 21 is formed with an exhaust port communicating with the atmosphere at an upper end thereof. The rainwater pipe 23 is configured to prevent foreign substances and rainwater from penetrating through the exhaust port. Further, one or more insect control net 24 is provided to prevent infiltration of insects, .

The reflector 22 may be extended in a downwardly inclined manner with respect to the exhaust pipe 21 while the bottom portion thereof may extend in a cylindrical structure having the same cross section.

The reflector 22 disperses (destroys) the groundwater injected through the injection nozzle 13 into fine particles by physical impact to actively induce contact between the air and the radon, thereby separating the radon from the groundwater.

The air diffusing means 30 injects outside air into the inside of the radon reducing housing 20 in the form of air bubbles to collide with the reflector 22 and then collects the dropped or scattered radon to be exhausted and blows air A supply pipe 32 for supplying the air blown by the blower 31, a distribution pipe 33 installed to be submerged in the groundwater in the radon reduction housing 20 and connected to the supply pipe 32 to distribute the air, The air bubbles are formed in the piping 33 and disposed below the groundwater surface in the radon reduction housing 20. The air bubbles collide with the reflection grate 22 of the radon reduction housing 20 and are sprayed onto the radon And an air sending nozzle 34 for exhausting the air.

The blower 31 is preferably a pressurized blower for securing an adequate amount of air necessary for radon reduction by sucking and blowing air in the air, and a filter 38 of, for example, a network structure for filtering foreign matters is applied to the suction end.

One side of the supply pipe 32 is connected to the outlet end of the blower 31 and connected to the distribution pipe 33 while being piped into the radon reduction housing 20. [

The distribution pipe 33 is connected to the supply pipe 32 to receive air and distribute the air to the plurality of air supply nozzles 34. For example, the air supply nozzles 34 may be ring- It is possible to adopt a plate shape in which a plurality of air sending nozzles 34 are arranged in a grid shape.

The distribution pipe 33 is disposed so as to be submerged in the groundwater so that the air sending nozzle 34 is disposed below the water surface of the ground water.

The air sending nozzle 34 injects air to generate air bubbles, so that air bubbles are adsorbed and exhausted in the course of ascending to the exhaust port of the exhaust pipe 21 by the upward flow.

The groundwater dropped by the reflector 22 falls into the radon reduction housing 20. The water level slightly lower than the blowing pressure of the blower 31 just below the water surface, that is, about 50 mm deep when the blower blowing pressure is 70 mmAq, So that the air supplied from the blower 31 is blown out from the water surface through the air supply nozzle 34 and is dripped with the groundwater falling down and is similarly aerated (abandoned) So that the contact between the electrodes can be greatly enlarged. Of course, the installation depth of the air sending nozzle 34 can be freely set for various reasons such as the radon content and the size of the radon reduction housing 20. [

Thus, when the air sending nozzle 34 is operated at a certain level of the ground water, a change in the level of the ground water may occur, and the position of the air sending nozzle 34 may be changed in accordance with the change in the water level of the ground water. The supply pipe 32 should be adjustable in height, and may be constructed of, for example, a flexible pipe that can be expanded or contracted, or a separate height-adjustable pipe 35 may be connected or a pipe of different diameters may be stretched. .

In addition, the distribution pipe 34 is installed through the buoyancy body 36 so as to be able to move up and down according to the ground water level.

The buoyant body 36 is preferably a detachably connected tubular structure that can be filled and replenished with a buoyant material (air or the like) therein. The buoyant body 36 is lifted and lowered according to the level of the groundwater through buoyancy, ) Are arranged at a certain depth.

Air blowing at a predetermined depth below the water surface by using the buoyant body 26 is also capable of lowering the static pressure of the blower 31 so that the effect of reducing the capacity of the blower 31 is large.

The power source of the blower 31 can be a commercial power source. However, the energy generated by the renewable energy generating means 40 (shown in FIG. 4) Power generation energy, wind power generation energy, etc.) as the driving source.

It is also possible to connect two or more radon abatement devices in series so as to reduce the radon over a multistage.

As shown in FIG. 3, the primary radon abatement apparatus 100-1 and the secondary radon abatement apparatus 100-2 are connected through a secondary water supply means 10-2.

The primary radon abatement apparatus 100-1 feeds groundwater of the underground corridor 1 through the primary water feed means 10-1 and injects it into the primary radon return housing 20-1, And the water in the primary radon recovery housing 20-1 is supplied to the secondary radon recovery housing 20-2 through the secondary water supply means 10-2 Bubbles are generated through the secondary generation means 30-2 while water is being supplied, and the radon is secondarily reduced in the secondary radon recovery housing 20-2.

Thus, according to the second-order radon reduction, the radon reduction efficiency is higher than that of the first-order radon reduction.

The present invention can be further applied to an ultrasonic spray method in order to improve the efficiency of recovery of radon by bubbles.

As shown in FIG. 5, the diffuser 30 is applied with an ultrasonic sprayer 37 for spraying groundwater by ultrasonic vibration.

The ultrasonic atomizer 37 is operated by receiving power from the outside, and the groundwater in the radon return housing 20 is vaporized by the ultrasonic wave to increase the bubble generation rate and thus to increase the recovery rate of the radon by the bubble.

The ultrasonic atomizer 37 is mounted on the upper portion or the lower portion of the buoyancy body 36 in a form of a plate having a plurality of minute holes, for example, by being detachably mounted through a clamp or the like.

The radon return housing 20 has been described as an example of a tank structure. However, as shown in FIG. 4, it is also possible for the present invention to operate the radon return housing 20 together with a separate tank 50.

The tank (50) has a structure in which ground water is contained therein, and existing ground water tanks as well as new tanks are possible, and stored ground water is discharged through a water outlet.

The radon return housing 20 is installed so that the reflector 22 is inserted into the tank 50 and the exhaust port of the exhaust pipe 21 communicates with the atmosphere.

The radon return housing 20 should have a bottom open structure and be fixed to one or more of the ceiling, wall, and floor of the tank 50.

At this time, the lower side of the radon return housing 20 is installed below the water surface of the ground water stored in the tank 50. This limits the mixing space inside the radon return housing 20, And the mixing efficiency can be increased in the radon return housing 20 while reducing the static pressure and the air volume of the radiant return tube 31. [

The groundwater radon reduction method using the physical impact and the radon reduction apparatus of the acid type groundwater according to the present invention is as follows.

1. Groundwater supply.

The water supply pump 11 of the water supply means 10 pumped and pumped the ground water in the heart 1 and the ground water is injected through the water supply pipe 11 and then through the injection nozzle 12.

2. Radon recovery.

The groundwater is sprayed toward the reflector 22 of the radon reduction housing 20 through the injection nozzle 12. In this process, the radon contained in the groundwater firstly contacts the air and the groundwater is hit by the reflector 22 The radon is secondarily contacted with air by fracture dispersion into fine particles.

The inside of the radon reduction housing 20 is provided with an atmosphere in which the gas is exhausted through the exhaust pipe 21 and the radon-containing gas is exhausted to the atmosphere through the exhaust port of the exhaust pipe 21.

On the other hand, after colliding with the reflector 22, the groundwater drops downward. At this time, air is injected into the groundwater through the diffusion means 30, and air bubbles are generated from the water surface side to rise toward the exhaust pipe 21 .

The air bubbles rise toward the exhaust port of the exhaust pipe 21, collide with the reflector 22, recover the radon of the falling groundwater, and then exhaust the air to the atmosphere through the exhaust pipe 21.

The groundwater in the heart 1 is pumped through, for example, a water supply pump 11 on the ground, and then is supplied to a small tank (not shown) When the water pump 51 and the pressure tank 52 (the feed pump 51 and the valve 53) are directly connected to each other, the water pump 51 is turned on / off when the valve 53 is opened and closed And the radon return housing 20 is installed in the tank 50 so that the bottom of the tank 50 is submerged in the ground water and operated .

The tank 50 may include a tank body having an opened upper portion and a lid for opening and closing an opening portion of the tank body, and an exhaust pipe 21 of the radon return housing 20 protrudes from the lid.

1: heartbeat, 10: watering means
20: Radon recovery housing, 21: Exhaust pipe
22: reflection shade, 30:
31: blower, 32: supply pipe
33: distribution pipe, 34: transmission nozzle
35: height adjusting pipe, 36: buoyant body
40: Renewable energy generation device, 50: tank

Claims (5)

A water supply means (10) for pumping and spraying groundwater of the underground water well (1);
The groundwater is sprayed by the water supply means and the groundwater is stored, while the radon-containing gas is discharged to the outside, and the groundwater sprayed by the water supply means is dispersed by the physical impact, A radon reduction housing (20) for mixing air;
The radon reducing housing is configured to inject air in the lower part of the groundwater below the water surface stored in the radon reducing housing to collide with the radon reducing housing, (30) for removing radon by inducing mixing of groundwater bubbles,
The radon reduction housing includes an exhaust pipe (21) having an exhaust port formed at an upper end thereof, and a reflector (22) extended at a bottom portion of the exhaust pipe to a larger area than the exhaust pipe,
The water supply means is installed below the reflection glow in the radon reduction housing, receives groundwater pumped from the underground water, and injects the water toward the reflection grate to collide with the reflection water to induce the separation of the radon contained in the ground water ),
The diffusing means includes a blower (31) for blowing air, a supply pipe (32) for supplying air blown by the blower, a distribution pipe (40) installed to be submerged in groundwater in the radon reduction housing (34) which is disposed in the distribution pipe and below the ground water surface in the radon reduction housing, blows air bubbles to collide with the reflection hatch of the radon reduction housing, and recovers the radon from the ground water And a buoyant body mounted on the distribution pipe such that a spraying end of the air sending nozzle is disposed below the water surface of the groundwater in the radon reduction housing, wherein the supply pipe is a structure capable of adjusting the height to correspond to a height change of the distribution pipe Characterized in that the physical impact and the radon reduction device of the acidic groundwater. delete [2] The apparatus according to claim 1, further comprising a tank having a space for storing groundwater therein, wherein the radon reduction housing is installed at the bottom so that an exhaust pipe is disposed in the atmospheric air, Radon abatement device. The apparatus of claim 1, wherein at least two of the radon reduction housings are arranged and connected through a feed pump to reduce radon over multiple stages.

[2] The apparatus of claim 1, wherein the diffuser includes an ultrasonic atomizer for spraying groundwater around the air sending nozzle by ultrasonic vibration.

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