KR100787909B1 - A regeneration method of a well-water basin using chemicals - Google Patents

Abstract

The present invention is a vertical using a chemical that can effectively remove the cause of the slime generated in the well due to long-term use of the well, the accumulation of metallic substances such as iron, manganese, microbial growth, blockage of aquifer, etc. ㆍ This method relates to the well regeneration method of horizontal wells, and completely removes contaminants that cause degradation of wells such as slime generation, metal accumulation, microbial growth, and aquifer blockage due to long-term use of the wells. Therefore, the intake efficiency of the groundwater is increased, and also safe intake of the groundwater can be achieved.

Therefore, it is a very useful invention to improve the water quality of the groundwater, maintain clean water and sewage, and preserve the water environment, thereby preventing environmental pollution and creating a pleasant environment.

Sump, Well, Regeneration, Slime, Microbe, Chemistry, Chemicals

Description

A well regeneration method of vertical and horizontal collection wells using chemicals {A REGENERATION METHOD OF A WELL-WATER BASIN USING CHEMICALS}

1 is a cross-sectional view showing a part of the process of taking a picture of the inside of the vertical water collecting well through the imaging equipment.

Figure 2 is a cross-sectional view showing the process of discharge of the groundwater of the horizontal catchment well through the pump.

3 is a cross-sectional view showing a part of the work table is installed on the well surface of the horizontal collection well.

Figure 4 is a cross-sectional view showing a part of the process of taking a picture of the interior of the horizontal collecting pipe through the image pickup device.

Figure 5 is a cross-sectional view showing a part of the embodiment of the vertical cleaning device for cleaning the inside of the well of the vertical water collecting well.

Figure 6 is a cross-sectional view showing a part of the embodiment of a horizontal cleaning device for cleaning the interior of the horizontal collection pipe.

7 is a cross-sectional view showing a partially cut process of installing the air injector inside the well.

Figure 8 is a cross-sectional view showing a part of the process of the chemical is injected into the interior of the vertical sump through the induction pipe.

Figure 9 is a cross-sectional view showing a part of the process of the chemical is injected into the inside of the horizontal sump through the induction pipe.

Explanation of symbols on the main parts of the drawings

1-well 2-level catch

10-Shooting Equipment 12-Pump

13-Outlet 20-Workbench

30-connector 35-closing valve

40-vertical washer 44-horizontal washer

50-Air sprayer 60-Induction pipe

The present invention relates to a well regeneration method of vertical and horizontal collection fertilization using chemicals, and more particularly, the generation of slimes in the wells due to long-term use of the wells, accumulation of metallic substances such as iron and manganese, and microbial growth. It is invented to remove the cause of the efficiency degradation of wells such as bio-film and aquifer clogging with chemicals.

In general, groundwater has good water quality as an uncontaminated water resource, and has a number of advantages over surface water because it is economically odorable.

The groundwater can be appropriately developed to improve the lack of water, and the groundwater is used as a water resource.

The catchment for the intake of riverside filtration is installed to indirectly collect the groundwater using the aquifer. The wells are vertically buried on the ground and the catchment is installed horizontally. After installation, horizontal collection wells (radiation type) are used, which collect and use groundwater.

However, when the collection well is used for a long time, there is a problem that slime occurs in the well or metal materials such as iron and manganese accumulate to contaminate groundwater.

In addition, in addition to the growth of microorganisms, the aquifer can be blocked by various contaminants, there was a problem that the difficulty of efficient intake of groundwater through the well.

Accordingly, an object of the present invention is to solve the above problems by removing various contaminants due to the long-term use of the well with chemicals so that safe intake of groundwater can be achieved.

An object of the present invention is to remove the slime, metallic substances, microorganisms, etc. generated in the well due to the long-term use of the sump to increase the efficiency of supplying groundwater through the well, and also to take the sanitary safe ground water The present invention provides a method for regenerating wells of vertical and horizontal collection wells using a chemical.

Another object of the present invention is to increase the water quality of the groundwater and at the same time maintain a clean water supply and sewage, and to preserve the water environment, thereby preventing vertical pollution and creating a pleasant environment, vertical and horizontal collection The present invention provides a method of regenerating a well of crystal.

The present invention for achieving the above object is a dismantling step of dismantling the water well covering the well;

A separation step of separating an underwater pump for taking ground water;

A photographing step of photographing the inside of the well of the vertical well and the wall surface with a photographing equipment;

A groundwater discharge step of discharging the groundwater inside the well to the outside through a water pump and a discharge pipe;

A work bench installation step of installing a work bench on the inner surface of the well where the groundwater is discharged;

A connection installation step of installing a connection pipe and a closing valve using the workbench;

A photographing step of photographing a state of the inner wall of the horizontal collection pipe by entering the photographing equipment into the connection pipe;

A cleaning step of cleaning the inside of the photographed well with a cleaning device to remove contaminants;

A first discharge step of discharging the groundwater containing contaminants to the outside through an air injector;

An induction pipe installation step of installing and inserting an induction pipe for chemical injection into the well of the groundwater discharged;

A reaction step of chemically injecting a chemical into the induction pipe;

A chemical injection step of spraying the chemically reacted drug into the well through the reaction step;

A second discharge step of discharging the groundwater containing the chemical to the outside through an air injector;

This is accomplished by a verification step that captures the interior wall of the well with the imaging equipment.

Therefore, through the regeneration method of the above configuration to remove the contaminants that cause the efficiency degradation of the well, such as slime generation, metal accumulation, microbial growth, aquifer blockage, etc. due to long-term use of the well to increase the water intake efficiency of groundwater In addition, safe groundwater can be withdrawn.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a partial cross-sectional view showing the process of photographing the interior of the vertical water collecting well through the imaging equipment.

Figure 2 shows a cross-sectional view of the process of discharge of the groundwater of the horizontal catchment well through the water pump to the outside.

3 is a cross-sectional view showing a part of the work table is installed on the well surface of the horizontal collection well.

4 is a cross-sectional view showing a part of the process of photographing the interior of the horizontal collection tube through the image pickup device.

FIG. 5 is a partial cross-sectional view of an embodiment of a vertical cleaning device for cleaning the inside of a well of a vertical water collecting well.

6 is a partial cross-sectional view showing an embodiment of a horizontal cleaning device for cleaning the interior of the horizontal collection pipe.

7 is a partial cross-sectional view showing the process of installing the air injector inside the well.

8 is a cross-sectional view showing a part of the process in which the chemical is injected into the vertical sump through the induction pipe.

9 is a cross-sectional view showing a part of the process in which the chemical is injected into the horizontal collection well through the induction pipe.

That is, in order to solve the accumulation of metallic substances such as slime, iron, manganese, accumulation of microorganisms, blockage of aquifers, etc., the dismantling step of dismantling the water well covering the well is performed through the present invention.

After dismantling the water well through this dismantling step, a separation step of separating the submersible pump for taking ground water from the well is performed, and the inside and the wall surface of the well where the submersible pump is separated through this separation step are photographed through photographing equipment. Done.

The photographing equipment 10 is a device for photographing the inside of the well 1 used for a long time to determine whether the slime is generated, the degree of accumulation of metallic substances, the growth of microorganisms, and whether the aquifer is blocked. It is shown that a known closed circuit television (CCTV) is used.

That is, after connecting the photographing equipment 10 to the photographing vehicle 11 using the wire 10a, the photographing equipment 10 enters the inside of the well 1 and photographs through the photographing equipment 10. The photographed image is transmitted to the monitor embedded in the photographing vehicle 11 to be displayed on the screen, thereby allowing the contractor to directly grasp the state of the inner wall of the well 1.

In this case, as shown in FIG. 1, the vertical sump is dismantled through the dismantling step and the separating step, and the photographing equipment is taken into the well in the state in which the underwater pump is separated.

In the case of the horizontal collection well (2), the groundwater discharge step of discharging the groundwater inside the well 1 to the water pump 12 and the worktable installation step of installing the work bench 20 inside the well from which the groundwater is discharged In the rough state, the inside and the wall of the well are photographed with the photographing equipment 10.

As shown in Figure 2, the water pump 12 is connected to the discharge pipe 13 installed in a known submersible pump and then exposed the tip of the discharge pipe 13 out of the well 1 to discharge the groundwater to the outside .

The reason for discharging the groundwater of the horizontal sump (2) to the outside through the water pump 12 and the discharge pipe 13 is for the installation of a work platform 20 for the worker to enter the work inside the well (1), FIG. As shown in 3, the work surface 20 is installed on the ground surface inside the well 1 in which the groundwater is completely discharged through the water pump 12 and the discharge pipe 13.

The workbench 20 is formed in the form of a combination of the vertical, horizontal frame mutually installed on the ground surface inside the well, the shelf 21 located at the top of the workbench 20 is lower than the installation height of the horizontal collection pipe (2) It is desirable to have a.

After the workbench 20 having such a configuration is installed on the ground surface, the connection pipe 30 is installed in the horizontal collection pipe 2 through the connection installation step.

The connecting pipe 30 is connected to the groundwater discharge valve 3 of the horizontal collecting pipe 2 to discharge the groundwater discharged from the horizontal collecting pipe 2 to the outside and at the same time the inside of the horizontal collecting pipe 2. To enter the shooting equipment (10).

To this end, the connection pipe 30 has a connection portion 31 connected to the groundwater discharge valve 3 in a state in which a passage 30a is formed therein, and an outlet portion connected to the connection portion 31 through an internal passage on the opposite side of the connection portion 31. 32 is formed, and it is shown that the outlet 33 is formed in the upper part.

In addition, an opening part 34 for opening or closing the passage 30a is formed in the lower portion of the connecting pipe 30 to serve to discharge the groundwater contained in the passage 30a to the outside.

The discharge valve 32 of the configuration of the connection pipe 30 is coupled to the closing valve 35, the outlet 33 is coupled to the hydraulic pressure holding pipe 36, the upper end of the hydraulic pressure holding pipe 36 is ground water As shown in FIG. 2, it is revealed in advance that the outlet valve 3 is exposed to the outside of the well 1 so as to maintain water pressure by supplying water into the connection pipe 30.

Therefore, as shown in FIG. 4, when photographing the interior of the horizontal collection tube 2 while the photographing equipment 10 enters the inside of the well 1 through the hydraulic pressure holding tube 36, the photographing equipment 10. The image taken through) is transmitted to the monitor embedded in the photographing vehicle 11 to be displayed on the screen, so that the state of the inner wall surface of the horizontal collection tube 2 can be grasped directly.

To describe this in more detail, in order to perform the photographing step through the photographing equipment 10, first the photographing equipment 10 enters the interior of the connection pipe 30 through the pressure holding tube 36, and then the pressure holding tube ( Water is supplied to 36 to fill the inside of the connector (30).

After the water is filled in the connection pipe 30 by the water supplied through the hydraulic pressure holding pipe 36, the groundwater discharge valve 3 is opened to open the inside of the connection pipe 30 and the horizontal collection pipe 2. The water pressure will be kept horizontal.

In the state where the water pressure is kept horizontal, the photographing equipment 10 connected through the photographing vehicle 11 and the electric wire 10a enters the inside of the horizontal collecting pipe 2 and photographs the inner wall surface of the horizontal collecting pipe 2. Then, the photographed internal wall state is transmitted to the photographing vehicle 11 to appear on the screen.

After the shooting through the photographing equipment 10 is completed, the groundwater discharge valve 3 is closed in the state in which the photographing equipment 10 is retracted into the connection pipe 30, and the lower opening and closing portion of the connection pipe 30 is closed. Opening the 34 to discharge the groundwater inside the connection pipe 30 into the well 1.

When it is confirmed that contaminants are generated in the photographing process through the photographing step, the cleaning step is performed by cleaning.

This cleaning step is a vertical cleaning device (40) or horizontal cleaning if slime generation, accumulation of metallic substances, microbial growth, blockage of the aquifer is found on the inner wall of the well (1) identified through the photographing equipment (10) The device 44 is cleaned and cleaned.

As an example of the vertical cleaning device 40, as shown in FIG. 5, a vertical brush (3) is applied to the drive motor 41 in a state in which the drive motor 41 driven by an external power source is installed outside the well 1. 42 shows that the vertical axis 43 is coupled and rotated.

That is, when the driving motor 41 is driven by an external power source, the vertical brush 42 is rotated along this to clean the wall inside the well 1, and the vertical brush 42 is rotated along the vertical axis 43 during the rotation process. By reciprocating up and down, the inner wall surface of the well 1 is evenly cleaned every corner.

In the case of the horizontal water collecting well 2, the horizontal cleaning device 44 is used for cleaning. As an example of the horizontal cleaning device 44, a movable motor driven by an external power source as shown in FIG. 45 is installed on the upper shelf 21 of the work table 20, the horizontal shaft 46 of the movable motor 45 passes through the closing valve 35 to enter the inside of the horizontal collecting pipe 2, At the tip, it is shown that the horizontal brush 47 is coupled to the horizontal shaft 46 to be rotated.

Accordingly, when the movable motor 45 is driven by an external power source, the horizontal brush 47 is rotated along this to clean the wall inside the horizontal collection pipe 2, and the horizontal brush 47 is rotated along the horizontal axis 46 in the rotation process. ) To move forward and backward to evenly clean the inner wall surface of the horizontal collection pipe (2).

Here, an elastic rubber that is a sealing element 48 is coupled between the horizontal shaft 46 of the movable motor 45 and the closing valve 35 to form a gap that may occur between the horizontal shaft 46 and the closing valve 35. Will be removed.

In the case of the ground water discharged from the horizontal collection pipe (2), it is discharged at a high pressure when the groundwater discharge valve (3) is opened, and a gap is generated between the horizontal shaft (46) of the movable motor (45) and the closing valve (35). This is because if the groundwater is discharged at high pressure through this gap, the worker may be exposed to danger.

That is, as the sealing element 48 made of the elastic rubber is coupled between the horizontal shaft 46 of the movable motor 45 and the closing valve 35, it is possible to prevent a worker's safety threat due to groundwater. .

The elastic rubber is used as an example of the sealing element 48 because the gap between the closing valve 35 and the horizontal shaft 46 does not occur when the horizontal shaft 46 rotates.

Here, in order to clean the inner wall surface of the horizontal collection pipe 2 through the horizontal cleaning device 44, the closing valve 35 is first opened to enter the horizontal brush 47, and then the closing valve 35 is closed. Done.

Then, water is supplied to the hydraulic pressure holding tube 36 to maintain the internal water pressure of the connecting pipe 30 to fill the water inside the connecting pipe 30.

After the water is filled in the connection pipe 30 by the water supplied through the hydraulic pressure holding pipe 36, the groundwater discharge valve 3 is opened to open the inside of the connection pipe 30 and the horizontal collection pipe 2. The water pressure will be kept horizontal.

In the state where the water pressure is kept horizontal, the horizontal brush 47 enters the inside of the horizontal collection well to perform the cleaning operation.

After the cleaning operation through the horizontal cleaning device 44 is completed, the groundwater discharge valve 3 is closed in a state in which the horizontal brush 47 is reversed into the connection pipe 30, and the connection pipe 30 is closed. Opening the lower opening and closing portion 34 to discharge the groundwater inside the connection pipe 30 into the well 1.

In the case of the vertical sump, which has been cleaned through the vertical cleaning device 40, the groundwater containing the pollutant is discharged to the outside through the first discharge step. It is shown that an air injector 50 is used.

As shown in FIG. 7, the air injector 50 discharges groundwater containing contaminants cleaned through the vertical cleaning device 40 to the outside. It is shown that the gas is installed outside the well 1 and the air compressor 52 is connected to the air compressor 51 so as to inject high pressure air into the well 1.

An additional air tank 53 is connected and installed in the air compressor 51, and an air opening and closing valve 54 is coupled between the air tank 53 and the air compressor 51 to improve the efficiency of the air compressor 51. It may be raised.

Accordingly, as the high pressure air is injected into the well 1 through the air compressor 51 and the air line 52, groundwater containing contaminants is discharged to the outside by the high pressure air, and the repeated ground water By the discharge of the groundwater inside the well (1) is to be purified.

In the case of the horizontal collection pipe (2), the ground water cleaned through the cleaning step is discharged into the well (1) by opening the lower opening and closing portion 34 of the ground water discharge valve (3) and the connection pipe 30, the discharged ground water Is finally discharged to the outside through the water pump 12 and the discharge pipe (13).

On the other hand, the induction pipe 60 for chemical injection for the introduction of chemicals is inserted into the wells and horizontal collection wells in which the groundwater containing pollutants discharged to the outside as described above.

The induction pipe 60 is a tube in which a myriad of holes are injected to inject chemicals, and in the case of vertical water collection, as shown in FIG. 8, the tip of the induction pipe connected to the chemical supply unit 61 directly inside the well. Will be inserted.

In the case of the horizontal collecting well (2), as shown in Figure 9, through the connecting pipe 30 is installed by inserting the induction pipe (60) into the interior of the horizontal collecting well (2), the chemical supply unit 61 and A control valve 62 is coupled between the induction pipes so as to control the amount of chemicals introduced.

After the induction pipe installation step, the chemical reaction is performed by injecting a chemical into the induction pipe 60, and a chemical injection step of spraying the chemically reacted chemicals is performed.

The chemical injected into the induction pipe 60 selects and uses different kinds of chemicals according to contaminants generated in the wells.

That is, as the type of chemical in the present invention (Acids), caustic (Caustics), chlorine (Chlorine compounds), oxidizing agent (Oxidizing agent) may be used alone, or may be used in combination if necessary.

Here, the removal of contaminants generated in the well through this kind of chemicals will be described in more detail as follows.

The acid is preferably used for removing metallic slime. The metallic slime is a salt of carbonate (Carvonates) and sulfuric acid in which hydrogen of carbonic acid is replaced with metal, but is naturally contained in igneous rock. It refers to silicates, which are generic terms of neutral salts, in which sulfates, oxides, hydroxides, and hydrogen salts of silicic acid are substituted with metal atoms and weathering products of gypsum, barite and lead sulfate.

This is because acid reacts with metals (zinc, magnesium, iron, etc.) to produce hydrogen gas, decompose iron into iron chloride, and react quickly with calcium to modify the precipitates and produce carbon dioxide. .

Thus, due to the properties of these acids, the loess deposits in the wells are partially loosened.

In addition, the wells are washed and disinfected at the same time by killing microbes (bacteria) while destroying biofilms formed in the wells and decomposing iron and manganese crusts.

Examples of acids that play such a role include sulfamic acid (HSO ₃ NH ₂ ), hydrochloric acid (HCl), phosphoric acid (Phosphoric Acid, H ₃ PO ₄ ), hydroxyacetic acid (Hydroxyacetic Acid, CH ₂ OHCOOH) and oxalic acid (Oxalic Acid, COOH) ₂ ). Other types of acids may be used depending on the construction site and the condition of the well.

Among them, the reaction formula of sulfamic acid, which is typically used, is as follows.

2Fe (HCO ₃ ) ₂ + Ca (HCO ₃ ) ₂ + 2HSO ₃ NH ₂ → 2Fe (OH) ₃ + Ca (SO ₃ NH ₂ ) ₂ + 6CO ₂ + 2H ⁺

Mn (HCO ₃ ) ₂ + Ca (HCO ₃ ) ₂ + 2HSO ₃ NH ₂ → MnO ₂ + Ca (SO ₃ NH ₂ ) ₂ + 4CO ₂ + 2H ₂ O + 2H ⁺

When treated with acid, the pH of the injection concentration is kept below 3.0.

The wells with severe slime are mixed with 8 to 15% by weight of acid and 85 to 92% by weight of water, so the slime is not severe and the wells with high concentration of manganese and iron are 6 to 8% by weight of acid and 92 to 94% by weight of water. Slightly slime is formed and the well below pH 7.0 is used by mixing 97% by weight of water with 3% by weight of acid.

In addition, the alkalinity (Alkalinity) is less than pH 6.0 wells are used by mixing 2% by weight of acid and 98% by weight of water, the reaction time is suitable for a minimum of 24 hours to a maximum of 72 hours.

Meanwhile, among chemicals used to regenerate wells, caustic is used to remove oil pollution and remove attached bio-fouling, and to neutralize wells and to allow mineral precipitation from solution. .

Examples of such caustics include sodium hydroxide (Caustic Soda, NaOH), potassium hydroxide (Kaustic Potash, KOH), sodium carbonate (Soda Ash, Na ₂ CO ₃ ), calcium hydroxide (Lime, CaO or Ca (OH) ₂ ), magnesium hydroxide (Hydro Magma, Mg (OH) ₂ ) is suitable.

The reaction of oil removal and mineral removal through the caustic is as follows.

(1) When oil is removed

(R-COO) ₃ C ₃ H ₅ (holding) + ₃ NaOH → 3RCOONa (soap) + C ₃ H ₅ (OH) ₃

(2) removing minerals

Fe (HCO ₃ ) ₂ + 3NaOH → Fe (OH) ₃ + 2NaHCO ₃ + Na ⁺

Fe (HCO ₃ ) ₂ + 3KOH → Fe (OH) ₃ + 2KHCO ₃ + K ⁺

2Fe (HCO ₃ ) ₂ + ₃ Na ₂ CO ₃ → Fe ₂ (CO ₃ ) ₃ + 2NaHCO ₃ + Na ⁺

2Fe (HCO ₃ ) ₂ + 3Ca (OH) ₂ → 2Fe (OH) ₃ + 2Ca (HCO ₃ ) ₂ + Ca ^{2 +}

2Fe (HCO ₃ ) ₂ + 3Mg (OH) ₂ → 2Fe (OH) ₃ + 2Mg (HCO ₃ ) 2 + Mg ^{2 +}

The addition of Fe ^{3 +} in caustic and reacted with the hydroxide alkalinity one attempts to lower the pH, if sufficient alkalinity is present to pH reduction by a buffer action does not occur rapidly.

In addition, the injection concentration and the reaction time of the caustic are shown in Table 1.

Table 1.

Well pH Concentration required to neutralize the well Reaction time 6 0.5 lbs Na ₂ CO ₃ or 0.3 lbs Ca (OH) ₂ 2.0hr 5 1.0 lbs Na ₂ CO ₃ or 0.6 lbs Ca (OH) ₂ 3.0hr 4 1.5 lbs Na ₂ CO ₃ or 0.9 lbs Ca (OH) ₂ 4.0hr 3 2.0 lbs Na ₂ CO ₃ or 1.2 lbs Ca (OH) ₂ 5.0hr 2 2.5 lbs Na ₂ CO ₃ or 1.5 lbs Ca (OH) ₂ 6.0hr

As described above, the reaction time required for oil removal is suitable for at least 24 hours up to 72 hours, and the reaction time for mineral removal is suitable for at least 24 hours up to 72 hours. And the reaction time required for neutralization is suitable for 2 hours to 6 hours.

Chlorine compounds, a chemical used in the present invention, are used to remove attached microorganisms and metallic slimes and to disinfect wells.

This is because, in the case of chlorine, it is characterized by generating hypochlorous acid (HOCl) to exert sterilizing power. When disinfecting and disinfecting a well inside with chlorine having such characteristics, the sterilizing power is increased as acid, and the sterilizing power is decreased in alkaline. .

Here, the bactericidal action of chlorine is effective for both Gram-positive and Gram-negative bacteria.

Examples of chlorine that performs this role include chlorine gas (Chlorine Gas, Cl ₂ ), sodium hypochlorite (NaOCl), calcium hypochlorite (Calcium Hypochlorite, Ca (OCl) ₂ ), and chlorine dioxide (Chlorine Dioxide). ClO ₂ ) is used, and the scheme is shown below.

(1) Chlorine gas (Cl ₂ ) (HOCl is about 80 times stronger than OCl form)

When gaseous chlorine enters water, two reactions occur: hydrolysis and ionization.

Therefore, hydrolysis is defined as follows.

(pH 7.0 or _{less) Cl 2 + H 2 O →} HOCl + H + + Cl -

(pH 8.0 or higher) HOCl → H ^{+ +} OCl ^-

2Fe (HCO ₃ ) ₂ + Ca (HCO ₃ ) ₂ + Cl ₂ → 2Fe (OH) ₃ + CaCl ₂ + 6CO ₂

Mn (HCO ₃ ) ₂ + Ca (HCO ₃ ) ₂ + Cl ₂ → MnO ₂ + CaCl ₂ + 4CO ₂ + 2H ₂ O

(2) sodium hypochlorite (NaOCl)

2Fe (HCO ₃ ) ₂ + Ca (HCO ₃ ) ₂ + 2NaOCl → 2Fe (OH) ₃ + Ca (OCl) ₂ + 6CO ₂ + 2Na ⁺

Mn (HCO ₃ ) ₂ + Ca (HCO ₃ ) ₂ + 2NaOCl → MnO ₂ + Ca (OCl) ₂ + 4CO ₂ + 2H ₂ O + 2Na ⁺

(3) calcium hypochlorite (Ca (OCl) ₂ )

2Fe (HCO ₃ ) ₂ + Mg (HCO ₃ ) ₂ + 2Ca (OCl) ₂ → 2Fe (OH) ₃ + 2Mg (OCl) ₂ + 6CO ₂ + 2Ca ⁺

Mn (HCO ₃ ) ₂ + Mg (HCO ₃ ) ₂ + Ca (OCl) ₂ → MnO ₂ + 2Mg (OCl) ₂ + 4CO ₂ + 2H ₂ O + Ca ⁺

(4) Chlorine Dioxide (ClO ₂ )

Fe (HCO ₃ ) ₂ + NaHCO ₃ + ClO ₂ → Fe (OH) ₃ + NaClO ₂ + 3CO ₂

Mn (HCO ₃ ) ₂ + ₂ NaHCO ₃ + 2ClO ₂ → MnO ₂ + 2NaClO ₂ + 4CO ₂ + 2H ₂ O

In this case, the injection concentration of chlorine is suitable to maintain 200 ~ 500mg / ℓ in the case of simple well disinfection, it is suitable to maintain 500 ~ 1000mg / ℓ in the general case well disinfection.

The maximum injection limit of chlorine is 1000 mg / l or less, and the reaction time is suitable for a minimum of 24 hours and a maximum of 72 hours.

Oxidizing agent, one of the chemicals described above, is used to remove adherent microorganisms and metallic slime, and is used to disinfect wells.

It has an excellent effect on the decomposition, sterilization, decolorization and deodorization of organic substances having strong oxidizing power and double bonds, and has no secondary pollution, and because of these characteristics, it functions to kill, remove and disinfect bacteria in the wells.

Types of oxidants that play such roles include phosphoric acid (Phosphates), hydrogen peroxide (Hydrogen Peroxide, H ₂ O ₂ ), potassium permanganate (Potassium Permanganate, KMnO ₄ ), ozone (Ozone, O ₃ ) and the like.

The reaction formula of ozone in the oxidant is as follows.

O ₃ + H ₂ O → HO ₃ ⁺ + OH

_{^{HO 3 + + OH - → 2HO}} 2

O ₃ + HO ₂ → HO + ₂ O ₂

HO + 2O ₂ → H ₂ O + O ₂

At this time, the free groups such as HO ₂ and HO have a strong oxidizing power, and the free groups such as HO ₂ and HO also has an oxidizing power and reacts with other impurities in the aqueous solution.

The injection concentration of oxidant is appropriate to maintain 200 ~ 500mg / l for simple well disinfection, but it is appropriate to maintain 500 ~ 1000mg / l for normal well disinfection. A minimum of 24 hours and a maximum of 72 hours are appropriate.

On the other hand, by adding an additional polymer dispersants to the chemical as described above it is possible to recycle the well more efficiently. Examples of such polymer dispersants are flocculants.

The coagulant includes an organic coagulant and an inorganic coagulant, among which a polymer coagulant is included in the organic coagulant, which is a water-soluble linear polymer having a molecular weight of tens of thousands to millions.

In addition, the inorganic flocculant causes agglomeration by neutralizing the surface charge of the suspended solids present in water, and the polymer coagulant has the effect of adsorbing and crosslinking the suspended solids at the active point on the polymer in addition to these effects. This makes it possible to use less than the inorganic flocculant.

Therefore, when the polymer dispersing agent is to form a block having a chemical attraction that causes crystallization, granulation, slime, colloidation, etc. of the chemical during the well washing by the chemical to combine the dissolved cations with the polymer to precipitate Optionally use

The polymer adsorbs cations such as _{Aln (OH) mCl 3 nm (} PAC) is Mg ^{2 +} that dissolved in ^{water, Mn 3 +, Fe 2 +} , Ca 2+ , and reaction.

The type and chemical formula of this polymer are shown in Table 2.

Kinds Chemical formula Solubility% (10 ~ 30 ℃) Solid aluminum sulfate Al ₂ (SO ₄ ) _{3 ·} 18H ₂ O 65.3-78.8 Liquid aluminum sulfate Al ₂ (SO ₄ ) ₃ solution - Poly aluminum chloride [Al ₂ (OH) _m Cl ₆ ] _n m = 2 ~ 4 - Ammonium alum _{Al 2 (SO 4) 3 (} NH 4) 2 · SO 4 · 24H 2 O 9.5 to 20.0 Potassium alum _{Al 2 (SO 4) 3 ·} K 2 SO 4 · 24H 2 O 7.6 to 16.6 Ferrous sulfate FeSO _{4 ·} 7H ₂ O 37.5 to 60.2 Ferric sulfate Fe ₂ (SO ₄ ) ₃ versus

The injection concentration of the polymer is 15.0 ~ 30.0 mg / L is suitable, the reaction time is suitable for a minimum of 2 hours to a maximum of 6 hours. It is also noted in advance that the injection concentration can be changed depending on the contamination state of the well.

As described above, the chemicals used in the present invention not only facilitate the well regeneration treatment of vertical and horizontal water collection wells, but also adjust the pH when necessary, and are effective against iron, manganese, bacteria, and other protozoa and fungi. Excellent resistance effect.

On the other hand, after the regeneration of the well through the chemical is completed, the induction pipe 60 is removed and then discharged the groundwater containing the chemical through the secondary discharge step.

In the case of the vertical water collecting well, the pollutants contained in the groundwater are discharged to the outside by using the air injector 50 in the second discharge stage, and the groundwater discharged to the outside becomes an appropriate state for intake. Until it is discharged.

And, in the case of horizontal collection wells, the lower opening / closing portion 34 of the groundwater discharge valve 3 and the connection pipe 30 is opened to be discharged into the well 1, and the discharged groundwater is pumped into the water pump 12 and the discharge pipe 13. ) Is finally discharged to the outside.

After the discharge of the groundwater is completed as described above, enter the photographing equipment (10) as a check step to take a picture of the interior wall state of the horizontal collection pipe (2) to confirm, and if it is determined that the removal of contaminants is completed After the removal of the photographing equipment (10), the submersible pump and the water well are assembled.

According to the configuration of the present invention as described above, by completely removing the contaminants generated by the long-term use of the well through the chemical, it is possible to increase the water intake efficiency of the well, and also to take the safe and sanitary ground water. .

Therefore, it is a very useful invention to improve the water quality of the groundwater, maintain clean water and sewage, and preserve the water environment, thereby preventing environmental pollution and creating a pleasant environment.

Claims (3)

A dismantling step of dismantling the well which covers the well; A separation step of separating an underwater pump for taking ground water; A photographing step of photographing the inside and the wall of the well of the vertical water collecting well by the photographing equipment 10; A groundwater discharge step of discharging the groundwater inside the well to the outside through the water pump 12 and the discharge pipe 13; A work bench installation step of installing the work bench 20 on the inner ground surface of the well where the groundwater is discharged; A connection installation step of installing the connection pipe 30 and the closing valve 35 by using the work table 20; A photographing step of photographing a state of an inner wall of the horizontal collection pipe 2 by entering the photographing equipment 10 into the connection pipe 30; A cleaning step of cleaning the inside of the photographed well with a vertical cleaning device 40 and a horizontal cleaning device 44 to remove contaminants; A first discharge step of discharging the groundwater containing contaminants to the outside through the air injector 50; An induction pipe installation step of installing and inserting an induction pipe 60 for chemical injection into the well of the groundwater discharged; A reaction step of chemically injecting a chemical into the induction pipe (60); A chemical injection step of spraying the chemically reacted chemicals through the reaction step into the well 1 and the horizontal collection well 2; A second discharge step of discharging the groundwater containing the chemical to the outside through the air injector 50; A method for regenerating a well of vertical and horizontal collection crystals using chemicals, characterized in that it consists of a checking step of photographing the inner wall of the well with the photographing equipment (10). The method of claim 1, The chemicals include acids containing at least one of sulfamic acid, hydrochloric acid, phosphoric acid, hydroxyacetic acid and oxalic acid; A caustic agent containing at least one of sodium hydroxide, potassium hydroxide, sodium carbonate, calcium hydroxide, and magnesium hydroxide; Chlorine containing at least one or more of chlorine gas, sodium hypochlorite, calcium hypochlorite, and chlorine dioxide; A method for regenerating wells of vertical and horizontal wells using chemicals, characterized by selecting and using an oxidant containing at least one of phosphoric acid, hydrogen peroxide, potassium permanganate, and ozone. The method of claim 1, And a chemical dispersant added to the chemicals.

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