KR101270933B1 - SYSTEM AND THE METHOD FOR REDUCING Fe and Mn IN THE WATER BY INJECTING OXYGEN SATURATED WATER INTO THE UNDERGROUND RIVERBED - Google Patents

Abstract

The present invention installs a plurality of injection wells around the vertical well to be collected through the underground aquifer in the soil, and by pressurizing the oxygen saturated water to artificially change the soil layer including the river bed from the reduced state to the oxidation state, ground water or The present invention relates to an iron manganese reduction system and method using oxygen-saturated water to remove iron and manganese contained in the filtered water by adsorbing the oxidized soil layer.
In the present invention, a plurality of injection wells are installed around a vertical sump well, and each of the injection wells is pressurized with oxygen-saturated water saturated with oxygen in a pump to change an underground aquifer into an oxidized state. Provided is an iron manganese abatement system and method using oxygen saturated water to oxidize and remove iron and manganese from groundwater or filtrate collected through a vertical well.
According to the present invention, it is possible to easily obtain groundwater or filtrate having high quality water from which iron and manganese are removed from the oxidized underground aquifer, and to reduce the water treatment process for reducing the separate iron and manganese. In addition, according to the present invention, it is possible to economically, stably and effectively remove iron and manganese from groundwater or riverbed filtered water, and obtain an excellent effect of constructing a filtration method that is harmless to the natural environment.

Description

System and method for reducing iron manganese using oxygen saturated water {SYSTEM AND THE METHOD FOR REDUCING Fe and Mn IN THE WATER BY INJECTING OXYGEN SATURATED WATER INTO THE UNDERGROUND RIVERBED}

The present invention relates to a device for reducing the concentration of iron and manganese dissolved in the soil layer in a water collecting facility using aquifer such as river bed and riverside filtration, and more specifically around the vertical water collecting well collected through the underground aquifer in the soil By installing a plurality of injection wells, pressurized oxygen saturated water to artificially change the soil layer, including the riverbed from the reduced state to the oxidation state, by removing the iron and manganese contained in the groundwater or filtered water by adsorption to the oxidized soil layer The present invention relates to an iron manganese abatement system and method using oxygen-saturated water to obtain high quality groundwater or filtered water with low iron and manganese contents.

In general, the river bed filtration method is a method of collecting river water by embedding a perforated pipe beneath the river bed sedimentary layer (river bed). The riverbed filtration method as described above can obtain the effect of improving the water quality through physical and chemical filtration, adsorption, and biological decomposition as river water passes through the bed.

The river filtration method is to bury a large number of screen-type perforated pipes under the bed, and connect the perforated pipes to a vertical catchment well, which is a water collecting facility, to collect them and pump them to the ground to utilize groundwater and filtered water for various purposes.

In general, the soil and the riverbed contain a large amount of metals such as iron and manganese, so that these components can be eluted when collecting the riverbed filtered water, and in many cases, the inflow of groundwater containing iron and manganese due to the characteristics of the domestic river exclusion site As a result, iron and manganese concentrations in the bottoms of the filtered water are often increased than raw water (river water).

As a conventional method for removing excessive iron and manganese, a method of introducing oxidants such as industrial oxygen and ozone into the ground in a gaseous state has been proposed. Such a conventional method is very likely to cause a channeling phenomenon of the oxidant in the ground, so that the soil filtrate is not evenly distributed and collected.

In addition, injecting gases or liquids with strong oxidizing power other than oxygen is not environmentally friendly as it increases the possibility of destroying the soil ecosystem, and when injecting industrial oxygen or ozone, the maintenance cost is excessive and there is an economic problem. .

In addition, another conventional technique is to provide a single well-type injection tube around a vertical sump, and to inject filtrate or separate water into the ground through such an injection tube. However, such a conventional technology cannot provide stable water by supplying separate water to a river filtration facility that needs to continuously collect groundwater, and is simply to supply filtered water or water, so that the effectiveness of removing iron and manganese is weak. There was a problem.

The present invention is to solve the above problems, the object of the present invention is to pressurized oxygen saturated water in the riverbed underground environment of the river water flowing portion to convert the underground aquifer to the oxidation state from the reduced state, iron and manganese in the bed filtered water By reducing the concentration, it is an object of the present invention to provide a system and method for reducing iron manganese using oxygen-saturated water to obtain high quality groundwater or filtered water having a very low concentration of iron and manganese.

Another object of the present invention is to improve the oxygen and saturated water to lower the iron and manganese content of groundwater or riverbed filtered water, economically and stably and effectively lower the iron and manganese content to obtain groundwater or riverbed filtered water of good quality. It is to provide a system and method for reducing iron manganese used.

In order to achieve the above object, the present invention, in the system for reducing the concentration of iron and manganese dissolved in the soil layer in the water collecting facility using the underground aquifer, a plurality of injection wells are installed around the vertical well Each of the injection wells is pressurized with oxygen-saturated water saturated with oxygen in water by a pump to change the underground aquifer into an oxidized state, and the iron from groundwater or filtrate collected through a vertical sump through the underground aquifer. Provided is an iron manganese reduction system using saturated oxygen water to oxidize and remove manganese.

In another aspect, the present invention preferably comprises a PSA device for producing oxygen saturated water by injecting oxygen separated from the air into the water, the PSA device comprises an air compressor for sucking and compressing the air, It is provided with a primary cooler for primary cooling, having a water separator for removing water from the primary cooled air, and having a plurality of adsorption towers for adsorbing and removing nitrogen through the adsorbent from the air from which the water is removed, A low pressure oxygen tank for storing oxygen discharged from the adsorption tower, a high pressure compressor for compressing the low pressure oxygen to a high pressure, a secondary cooler for cooling high pressure oxygen, and a high pressure cooled oxygen for storing While having a high pressure oxygen tank, the pipe drawn out from the high pressure oxygen tank is collected through the vertical sump Oxygen saturated water is generated by being connected to a water pipe for drawing water from the tank for storing the groundwater or filtered water, and further comprising a pump for pressurizing and supplying the oxygen saturated water provided from the PSA device to the injection well. It provides a system for reducing iron manganese.

And the present invention preferably the injection well is made of a vertical perforated tube arranged in a plurality of vertically around the vertical collection well, or made of a horizontal perforated tube arranged in a plurality of horizontally around the vertical collection well The vertical perforated pipe and the horizontal perforated pipe each provide a manganese reduction system using oxygen saturated water in which a screen is formed to inject oxygen saturated water from the inside to the outside.

In addition, the present invention is preferably the injection well is installed at any point 5 to 10m spaced apart from the vertical collection well, the screen depth of the injection well is formed at 20 to 30% or 60-70% of the depth of the vertical catch well Provide a system for reducing iron manganese using saturated water.

And the present invention preferably provides a system for reducing iron manganese using oxygen-saturated water further comprises a water quality measuring system for measuring the concentration of iron and manganese in the ground water or filtered water in the pipe for sending out ground water or filtered water from the vertical sump. do.

In order to achieve the above object, the present invention provides a method for reducing the concentration of iron and manganese dissolved in the soil layer of the water collecting facility using the underground aquifer, to install a plurality of injection wells around the vertical well step; Pressurizing and injecting oxygen saturated water in which oxygen is saturated in water to the injection well by a pump to change the underground aquifer into an oxidized state; Oxidizing and removing iron and manganese from the groundwater or filtrate collected through the vertical catchment through the underground aquifer; Measuring the concentration of iron and manganese in the groundwater or filtrate obtained from the vertical sump through a water quality meter; And terminating the oxygen saturated water injection operation if the concentration of iron and manganese is lower than the reference value, and restarting the oxygen saturated water injection operation if the concentration is higher than the reference value. It provides a method for reducing iron manganese in the ground using oxygen-saturated water that can be produced.

In addition, the present invention is preferably the step of installing a plurality of injection wells around the vertical well, the injection wells are installed at any point 5 to 10m away from the vertical well, and the screen depth of the injection well is the vertical well Provided is a method for reducing iron manganese in the ground using oxygen saturated water formed at 20 to 30% or 60 to 70% of the depth.

And the present invention preferably pressure-injecting the saturated oxygen water is a plurality of suction the air through the PSA device, compresses the air, then removes the moisture from the air, the adsorption and removal of nitrogen through the adsorbent It passes through any one of the adsorption tower to remove nitrogen from the air and passes oxygen, compresses the oxygen at high pressure and stores it in a high pressure oxygen tank, supplies oxygen from the high pressure oxygen tank to the water pipe to produce oxygen saturated water, pump It provides a method for reducing iron manganese in the ground using oxygen saturated water made through the process of pressurizing and supplying to the injection well.

In addition, the present invention is preferably a plurality of adsorption tower for removing nitrogen from the air and passing oxygen to pass nitrogen through any one of them to remove nitrogen from the air, the other to remove nitrogen contained in the adsorbent The adsorbent regeneration process is performed, and such an adsorbent regeneration process is performed by discharging nitrogen from the adsorbent to the outside using oxygen previously separated under normal atmospheric pressure, and the adsorption tower alternately operates to separate nitrogen from the air. In addition, the present invention provides a method for reducing iron manganese in the ground using oxygen-saturated water to produce oxygen.

According to the present invention, since most soils in the underground environment have a high water permeability, a large number of injection wells are installed around the collection basin by using a property of greater permeability, and oxygen saturated water is injected to artificially excite the soil layer including the river bed. It is possible to oxidize the groundwater, and it is possible to adsorb iron and manganese of groundwater or riverbed filtered water eluted through it to the oxidized soil layer, so it is easy to obtain groundwater or filtered water having high quality water in a vertical catchment. An excellent effect of reducing the water treatment process for reducing and manganese can be obtained.

In addition, according to the present invention, the oxygen is saturated to the maximum and periodically injected into the injection well, but if the concentration of iron and manganese is lower than the reference value, the operation of injecting saturated oxygen water is terminated, and if the concentration is higher than the reference value, the restart operation is performed. This intermittent operation cycle gives sufficient reaction time to oxidize the environment of the soil layer, and it is possible to change the intermittent operation cycle in various ways according to the water quality and environmental conditions. It can also be effectively removed.

According to the present invention, the oxygen saturated water injection well is installed separately from the perforated pipe of the existing river filtration intake system so that it does not affect the operation of the river filtration facility (intake of river water). In addition to using the PSA (Pressure Swing Absorption) method, pure oxygen can be separated from the air, and saturated with water as much as possible to inject into the ground. The result is an excellent effect of establishing a harmless way to the natural environment.

1 is a block diagram showing the overall configuration of the iron manganese reduction system using the oxygen saturated water according to the present invention having an injection well of the vertical hole pipe.
Figure 2 is a block diagram showing the overall configuration of the iron manganese reduction system using the oxygen saturated water according to the present invention having an injection well of the horizontal hole pipe.
Figure 3 is a block diagram showing the configuration of the PSA device provided in the iron manganese reduction system using oxygen saturated water according to the present invention.
FIG. 4 is a plan view illustrating a configuration in which an injection well of a vertical perforated tube is disposed around a vertical sump well in an iron manganese reduction system using oxygen saturated water according to the present invention illustrated in FIG. 1.
Figure 5a is an explanatory view showing a distance spaced apart from the vertical collection well of the vertical well pipe in the iron manganese reduction system using oxygen saturated water according to the present invention.
Figure 5b is a longitudinal sectional view showing the injection well of the vertical hole tube in the iron manganese reduction system using oxygen saturated water according to the present invention.
6 is a flowchart illustrating a method for reducing iron manganese in the ground using oxygen saturated water according to the present invention step by step.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

Iron manganese abatement system 100 using oxygen saturated water according to the present invention, as shown in Figure 1, iron and manganese dissolved in the soil layer in the water collecting facility using the underground aquifer, such as river filtration and river filtration As a system for reducing the concentration of water, is installed adjacent to the stream 102, a plurality of perforated pipes 104 are installed at the bottom of the river 102, around the vertical sump (106) for collecting ground or filtered water A plurality of injection wells 110 are installed.

Such injection well 110 is composed of a vertical perforated pipe 112a arranged in a plurality of vertically around the vertical sump 106, or as shown in Figure 2, the vertical sump 106 Consisting of a horizontal perforated tube 112b disposed horizontally around the center.

The vertical perforated pipe (112a) is used when iron, manganese is eluted in the exclusion zone is likely to flow into the bottom filtration water, the horizontal perforated pipe (112b) is iron and manganese is eluted from the bottom bed stack flows into the bottom filter It is used when there is a high possibility, respectively, in consideration of the flow direction of the groundwater is installed to economically prevent the inflow of iron and manganese into the vertical water collecting well 106 of the bottom filter.

Each of the injection wells 110 is pressurized with oxygen-saturated water saturated with oxygen in water by means of a pump 148. Each of the vertical well pipes 112a and the horizontal hole pipes constituting the injection well 110 is formed. 112b are each configured such that a screen 114 is formed to inject oxygen saturated water from the inside to the outside.

As described above, the present invention supplies oxygen saturated water to the injection well 110. For this purpose, the present invention includes a pressure swing absorption device (PSA) 120.

As shown in FIG. 3, the PSA device 120 includes an air compressor 122 that sucks and compresses air, and primary air is compressed in the rear end pipe 122a of the air compressor 122. A primary cooler 124 for cooling is provided, and a water separator 126 for removing moisture from air cooled primary in the rear end pipe 124a of the primary cooler 124 is provided.

The rear end of the water separator 126 is provided with a plurality of adsorption towers 128a and 128b for adsorbing and removing nitrogen from the air from which water is removed through the adsorbent 130. Such a plurality of adsorption towers 128a ( 128b) each includes an adsorbent 130 such as zeolite.

When air passes through the adsorption towers 128a and 128b, nitrogen having good adsorption power is adsorbed by the zeolite adsorbent 130, and oxygen having lower adsorption power than the nitrogen passes through the adsorbent 130 as a production gas. Discharged.

Such adsorption towers 128a and 128b are operated in plural alternations, and when the air is passed through one of the plurality of adsorption towers 128a and 128b to remove nitrogen from the air and produce oxygen, the other is an adsorbent. An adsorbent regeneration process is performed to remove nitrogen contained in the 130, and such an adsorbent regeneration process is performed by discharging nitrogen from the adsorbent 130 to the outside using oxygen previously separated under general atmospheric pressure conditions.

Therefore, when the adsorbent regeneration process is completed, the air moving paths of the adsorption towers 128a and 128b are automatically changed so that air is introduced through the adsorption towers 128a and 128b where the regeneration is completed, and the adsorption tower 128a is producing oxygen. (128b) is the air supply is stopped, the adsorbent regeneration process is made so that the adsorption tower (128a) (128b) alternately operates to separate nitrogen from the air and produce oxygen.

The rear end pipe 132 of the plurality of adsorption towers 128a and 128b includes a low pressure oxygen tank 134 for storing oxygen produced by the adsorption towers 128a and 128b, and the rear end pipe 134a includes And a high pressure compressor 136 for compressing low pressure oxygen to high pressure.

In addition, the rear end pipe 136a of the high pressure compressor 136 is provided with a secondary cooler 138 for cooling the high pressure oxygen, and the high pressure oxygen tank 140 for storing the high pressure cooled oxygen in the rear end pipe 138a. Is provided, the pipe 142 withdrawal from the high-pressure oxygen tank 140, the water pipe 146 for withdrawing water from the tank 144 for storing the groundwater or filtered water collected through the vertical water collecting tank 106 Oxygen is dissolved by being injected at a high pressure into the ground water or the filtered water to be connected thereto, and oxygen saturated water is generated. Such oxygen saturated water is pressurized and supplied to the injection well 110 through the pump 148.

In addition, the injection well 110 is to install a plurality of injection well 110 around the vertical collecting well 106, such injection well 110 is a vertical perforated pipe (112a) or horizontal perforated pipe (112b) 4 and 5a from the vertical sump 106, 5 to 10m distance (L) is installed at any point spaced apart, as shown in Figures 1, 2 and 5b The screen depth h of the injection well 110 is formed at 20-30% or 60-70% of the depth of the vertical sump 106.

This injection well 110 is 5m to 10m around one vertical well 106 in consideration of the range of the radius of influence of the vertical well (106) in which water is collected and the economic range (interval) in which oxygen-saturated water is injected. Is placed.

Such injection well 110 may be used to install the observation well (not shown) for observing the surrounding ground water level after completion of the bottom filter facility, it may be recycled for use of the injection well (110). If the observation well is not installed, the injection well 110 of the vertical hole hole 112a or the horizontal hole hole 112b is installed.

In addition, the Korean river (102) can be divided into a case where the aquifer of the river (102) is well developed and a weak case according to the natural aquifer results, and the river filtration facility structure in the river (102) of the two conditions Considering the minimum physically required depth of the aquifer and the catchment range of the filtrate, the result is a vertical perforated pipe 112a at 20-30% or 60-70% of the depth of the vertical sump 106. Or the screen depth h provided in the injection well 110 of the horizontal hole tube 112b is most preferable to inject oxygen saturated water.

And the iron manganese reduction system 100 using the oxygen saturated water according to the present invention is to measure the concentration of iron and manganese in the ground water or filtered water to the pipe 150 for sending ground water or filtered water from the vertical catchment 106 And further includes a water quality meter 152.

The water quality measuring system 152 measures the concentration of iron and manganese in the groundwater or filtered water obtained from the vertical sump 106. If the concentration of iron and manganese detected from the groundwater or filtered water is a reference value, for example, 0.3 If it is lower than mg / L, the operation of injecting saturated oxygen water is terminated. If the concentration is higher than the reference value, the operation of injecting oxygen saturated water is restarted.

That is, in the operation method, for example, the injection of oxygen saturated water is performed for three days to change the underground aquifer to the oxidation state, and from the ground or filtrate collected through the vertical sump 106 through the underground aquifer. After measuring the concentration of iron and manganese, if it is recorded for more than 15 days under the set detection limit, the operation stops automatically and stops for 3 days.

After stopping the operation for 3 days, the concentration of iron and manganese is measured again from the groundwater or the filtered water, and if it is higher than the set detection limit, the operation of 3 days and 3 days of stoppage is repeated. By repeating the cycle, the operation cycle can be varied according to the water quality and environmental conditions. As a result, it is possible to economically, stably and effectively remove iron and manganese from the groundwater or the riverbed filtered water.

Reference numeral 162 is a pressure gauge, and 164 is a flow meter.

Hereinafter, the method 200 for reducing the iron manganese concentration in the ground water or the filtered water using the iron manganese reduction system 100 using the oxygen saturated water according to the present invention will be described in more detail.

A method for reducing iron manganese in the ground using oxygen saturated water according to the present invention 200 is shown in stages in FIG. 6.

First, the method for reducing iron manganese in the ground using oxygen saturated water according to the present invention 200 includes a step S1 of installing a plurality of injection wells 110 around the vertical collecting well 106.

As such, the step S1 of installing the plurality of injection wells 110 around the vertical sump 106 may be performed by vertically collecting the injection wells 110 formed of the vertical hole holes 112a or the horizontal hole holes 112b. Installed at an arbitrary distance 5-10 m from the crystal 106, and the screen depth h of the injection well 110 is 20-30% or 60-70% of the depth H of the vertical well. To form.

In addition, the injection well 110 is pressurized with oxygen-saturated water saturated with oxygen in water by means of a pump 148 to change the underground aquifer to an oxidation state (S2).

In this step (S2) to separate the oxygen from the air through the PSA device 120 and dissolved oxygen saturated water in the ground water or filtered water, the PSA device 120 to suck the air through the air compressor 122 The air is compressed to high pressure and then water is removed from the air through the water separator 126.

In addition, the air from which moisture is removed is passed through any one of the plurality of adsorption towers 128a and 128b that adsorbs and removes nitrogen through the adsorbent 130, thereby adsorbing and removing nitrogen from the air and passing oxygen, and compressing the oxygen under high pressure. To be stored in the high-pressure oxygen tank (140).

Meanwhile, the plurality of adsorption towers 128a and 128b which remove nitrogen from the air and allow oxygen to pass through are alternately operated to separate nitrogen from the air and produce oxygen, and the plurality of adsorption towers 128a ( 128b) passes through oxygen to remove nitrogen from the air to produce oxygen, and the other is an adsorbent regeneration process for removing nitrogen contained in the adsorbent 130.

This adsorbent regeneration process is to discharge nitrogen from the adsorbent 130 to the outside by recycling in a reverse direction using a portion of the oxygen previously separated under the normal atmospheric pressure conditions, the adsorption tower (128a) (128b) is completed The adsorption towers 128a and 128b, which are reactivated and currently produce oxygen, are again interrupted in the air flow, and the adsorbent regeneration process is performed in turn, and the adsorption towers 128a and 128b are alternately operated.

Oxygen saturated water is injected by injecting oxygen discharged from the high pressure oxygen tank 140 into the water pipe 146 which draws water from the tank storing the groundwater or the filtered water collected through the vertical sump 106. It is generated and supplied to the injection well 110 by the pump 148.

Therefore, the oxygen saturated water introduced into the injection well 110 forms an underground aquifer in an oxidized state, that is, an oxidizing atmosphere, through the screen 114 provided in the vertical hole hole 112a or the horizontal hole hole 112b. Step S3 is performed to oxidize and remove iron and manganese from groundwater or filtrate collected through the aquifer to the vertical sump 106.

In addition, the step (S4) of measuring the concentration of iron and manganese in groundwater or filtrate obtained from the vertical sump 106 through a water quality measurement system 152 is performed, and if the concentration of iron and manganese is greater than the reference value, If the concentration is low, for example, when the concentration of iron and manganese in the groundwater or the filtered water is 0.3 mg / L or less, the oxygen saturated water injection operation is terminated, and when the concentration is higher than 0.3 mg / L, restarting the oxygen saturated water injection operation ( Including the S5) is to produce a good quality ground water or filtered water of the iron and manganese oxide oxidized in the vertical sump (106).

As described above, the present invention installs a plurality of injection wells 110 around the vertical sump 106 and injects oxygen saturated water so that the soil layer including the bed phase can be artificially converted from the reduced state to the oxidation state. In this case, iron and manganese of groundwater or riverbed filtered water eluted through this can be adsorbed to the oxidized soil layer. Thus, in the vertical sump 106, the groundwater or filtrate having high quality water with a significantly lower concentration of iron and manganese is obtained. And it can be obtained an excellent effect of reducing the water treatment process for reducing the separate iron and manganese.

In addition, the present invention is to saturate the oxygen in water as much as possible to periodically inject the inside of the injection well 110, if the concentration of iron and manganese is lower than the reference value, the oxygen saturated water injection operation is terminated, if the concentration is higher than the reference value restart operation Through this intermittent operation cycle, it is possible to give enough reaction time to oxidize the environment of the soil layer, and it is possible to vary the intermittent operation cycle according to the water quality and environmental conditions. This makes it possible to remove stably and effectively.

In addition, the present invention is to install the oxygen saturation water injection well (110) separately from the perforated pipe of the existing bed filter intake system, or to use the conventional observation hole to affect the operation of the bed filter facility (water intake) Since it is not given, it is possible to stably produce high quality groundwater and filtered water.

In addition, the present invention uses a PSA (Pressure Swing Absorption) method to separate pure oxygen from the air, and saturate it with water as much as possible to take a pressurized injection into the ground, so that the natural aquifer can be used as a reaction tank. You get an excellent effect to build a way that is harmless to the environment.

As described above, optimal embodiments have been disclosed in the drawings and the specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100 ...... Iron Manganese Reduction System Using Oxygen Saturated Water
102 ...... River 104 ......
106 ...... vertical sump 110 ......
112a ..... vertical perforated pipe 112b ...... horizontal perforated pipe
114 ...... Screen 120 ...... Pressure Swing Absorption (PSA) Device
122 ...... Air compressor 122a, 124a, 134a, 136a, 138a ...... Plumbing
124 ...... Primary cooler 126 ...... Moisture separator
128a, 128b ..... adsorption tower 130 ...... adsorbent
134 ...... low pressure oxygen tank 136 ......... high pressure compressor
138 ...... Secondary cooler 140 ...... High pressure oxygen tank
144 ...... Tank 146 ...... Water Piping
148 ...... Pump 152 ..... Water Quality Meter
162 ..... Pressure gauge 164 ...... Flowmeter
200 ..... Reduction Method of Iron Manganese in Ground Using Oxygen Saturated Water
h ...... screen depth H ....... vertical catch depth L ....... distance
S1... Installing a plurality of injection wells around the vertical sump
S2 ...... Pressure injection of saturated oxygen water to the injection well by pump to change the underground aquifer to oxidation state
S3 ...... Oxidizing and removing iron and manganese from groundwater or filtrate collected by vertical wells
S4 ...... Measuring the concentration of iron and manganese in groundwater or filtered water through a water quality meter
S5 ...... If the concentration of iron and manganese is lower than the reference value, the step of terminating the oxygen saturated water injection operation; if it is high, restarting the oxygen saturated water injection operation.

Claims (9)

In a system for reducing the concentration of iron and manganese dissolved in the soil layer in a water collecting facility using an underground aquifer, a plurality of injection wells are installed around a vertical well well, each of which saturates oxygen in water. Pressurized oxygen saturated water was pumped to change the underground aquifer to an oxidized state, and the iron and manganese were oxidized and removed from groundwater or filtrate collected through a vertical sump through the underground aquifer.
A PSA device for producing oxygen saturated water by injecting oxygen separated from air into water, the PSA device having an air compressor for sucking and compressing air, and a primary cooler for primary cooling of the compressed air. And a moisture separator for removing moisture from the primary cooled air, and having a plurality of adsorption towers for adsorbing and removing nitrogen from the air from which the moisture has been removed through an adsorbent. A low pressure oxygen tank for storing, a high pressure compressor for compressing the low pressure oxygen to a high pressure, a secondary cooler for cooling the high pressure oxygen, a high pressure oxygen tank for storing the high pressure cooled oxygen, , The pipe drawn out from the high pressure oxygen tank stores the ground water or the filtered water collected through the vertical sump. Oxygen saturated water is produced by being connected to a water pipe for taking out water from the tank, and further comprising a pump for pressurizing and supplying the oxygen saturated water provided from the PSA device to the injection well. Iron Manganese Reduction System Using Saturated Water. delete The method of claim 1, wherein the injection well is made of a vertical perforated tube arranged around the vertical collection wells vertically or a plurality of horizontal perforated pipes arranged around the vertical collection wells The iron manganese reduction system using oxygen saturation water, characterized in that the vertical perforated pipe and the horizontal perforated pipe are each formed of a screen and the injection of oxygen saturated water from the inside to the outside. According to claim 3, wherein the injection well is installed at any point 5 to 10m away from the vertical catchment, the screen depth of the injection well is formed at 20 to 30% or 60-70% of the depth of the vertical catchment Iron manganese reduction system using oxygen saturated water to make. The method of claim 1, wherein the pipe for sending ground water or filtered water from the vertical water collection well further includes a water quality measuring system for measuring the concentration of iron and manganese in the ground water or filtered water, iron manganese reduction using saturated oxygen water system. In the method for reducing the concentration of iron and manganese dissolved in the soil layer in the water collecting facility using the underground aquifer,
Installing a plurality of injection wells around the vertical sump;
Pressurizing and injecting oxygen saturated water in which oxygen is saturated in water to the injection well by a pump to change the underground aquifer into an oxidized state;
Oxidizing and removing iron and manganese from the groundwater or filtrate collected through the vertical catchment through the underground aquifer;
Measuring the concentration of iron and manganese in the groundwater or filtrate obtained from the vertical sump through a water quality meter; And
When the concentration of iron and manganese is lower than the reference value, the oxygen saturation water injection operation is terminated, and if the concentration is higher than the reference value; and restarting the operation of oxygen saturation water injection; including; Method for reducing iron manganese in the ground using oxygen saturated water, characterized in that configured to be. 7. The method of claim 6, wherein the step of installing a plurality of injection wells around the vertical wells is to install the injection wells at any point 5 to 10 meters away from the vertical wells, the screen depth of the injection wells depth Method for reducing iron manganese in the ground using oxygen saturated water, characterized in that formed at 20 to 30% or 60-70% of the point. The method of claim 6, wherein the pressurized injection of saturated oxygen water includes a plurality of adsorption towers that suck air through a PSA device, compress air, remove moisture from the air, and adsorb and remove nitrogen through the adsorbent. Removes nitrogen from the air by passing through oxygen and passes oxygen, compresses the oxygen under high pressure to store it in a high pressure oxygen tank, supplies oxygen from the high pressure oxygen tank to the water pipe to generate oxygen saturated water, and The method of reducing iron manganese in the ground using oxygen saturated water, characterized in that through the process of supplying pressure to the injection well. The adsorbent of claim 8, wherein the plurality of adsorption towers for removing nitrogen from the air and passing oxygen pass an oxygen through one of them to remove nitrogen from the air, and the other adsorbent for removing nitrogen contained in the adsorbent. The regeneration process is performed, and this regeneration process is performed by discharging nitrogen from the adsorbent to the outside using oxygen previously separated under normal atmospheric pressure conditions, and the adsorption tower alternately operates to separate nitrogen from the air. Method for reducing iron manganese in the ground using oxygen saturated water, characterized in that to produce oxygen.

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