KR101799966B1 - In-situ washing system of groundwater wells and its control method considering the rehabilitation effect of well efficiency - Google Patents

Abstract

The present invention provides a system for washing a tube well of underground water at an initial position by considering improving effect of well efficiency and a washing method for the same. According to the present invention, a washing member having the length corresponding to the length of the tube well of the underground water and injecting washing gas in even pressure and an even flow rate in the whole inner part of the tube well of the underground water is installed by being fixed. Therefore, a contaminant which causes clogging generated in the tube well of the underground water neglected for long time as well as an aquifer around the tube well of the underground water and a redundant member on the outer side of a screen (inlet hole) installed in the tube well of the underground water, is efficiently removed. Also, inconvenience of lifting an underground water motor pump from the tube well of the underground water to wash the tube well of the underground water is removed. The system for washing a tube well of underground water at an initial position can improve work efficiency when the tube well of the underground water is washed and can automatically discharge the removed contaminant to the upper part of the ground by the underground water motor pump. The system for washing a tube well of underground water at an initial position can simplify washing work on the tube well of the underground water by performing only connection work of a washing gas supply unit on the ground.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-situ groundwater cleaning system and a cleaning method thereof,

More particularly, the present invention relates to a cleaning method of a groundwater well, and more particularly, to a method of cleaning a groundwater well with a length corresponding to the length of the groundwater, (A filtering medium) of the screen (inflow hole) provided in the underground water well, and an occlusion occurring in the aquifer around the underground water well, as well as the inside of the groundwater well that is left for a long time without lifting the underwater motor pump from the underground water well. the present invention relates to an in-situ groundwater flushing cleaning system and a flushing method thereof, which effectively removes clogging-induced contaminants and allows the removed contaminants to be discharged directly to the ground through an underwater motor pump .

In general, groundwater is less expensive than surface water and can produce much water in a small area, unlike reservoir, and has a merit that water pollution is small and stable water quantity can be obtained by short term construction.

In other words, the ground water temperature is about 15 ℃ and bacteria pollution such as Escherichia coli is small and not only the minerals such as a large amount of minerals are contained but also the water volume does not fluctuate rapidly and the temperature is also constant and is used as drinking water. Cooling water, tourism water, etc., and the production unit cost is lower than that of the general waterworks, so that a certain amount of groundwater development is indispensable for industrial activities.

Accordingly, in order to clean the groundwater well, a groundwater well having a multistage inflow screen has been installed in response to the water level of the groundwater, and in order to clean the groundwater well, the registered patent publication No. 10-0651052 1 ") and in the groundwater channel with the inlet of the groundwater channel located on the ground open as disclosed in Laid-Open Patent Publication No. 10-2012-0094192 (hereinafter referred to as " Prior Art 2 " After the device has been inserted, compressed clean gas (eg nitrogen, oxygen, hydrogen or argon compressed gas) is injected to cause groundwater and contaminants to rise through the inlet of the well So that the cleaning was performed.

That is, the above-described prior arts 1 and 2 require a process as described below.

First, prepare a crane on the ground.

Second, connect the underground motor pump in the underground water well to the ground crane.

Third, the submersible motor pump in the underground water tank is lifted to the ground through the crane.

Fourth, the gas injector is injected into the groundwater tank, and the cleaning device is sequentially sprayed from the ground to the ground along the groundwater well, or sprayed with compressed cleaning gas to raise the inside of the groundwater well The process of removing the foreign matter adsorbed on the screen (inflow hole) provided in the groundwater well as well as the washing room is performed.

Fifth, after completion of washing of the groundwater well, the washing device is separated from the groundwater well, and then the underwater motor pump is reinstalled in the groundwater well through the crane.

Sixth, it is removed through the re-installed submersible motor pump, and the pollutant accumulated in the bottom of the underground water well is discharged to the ground along with the ground water to finish the washing work.

However, the cleaning operation of the groundwater well in accordance with the above-mentioned operation sequence has a construction disadvantage that the installation cost of the equipment and the operation time are too much.

Also, in the above-described prior arts 1 and 2, the groundwater tank cleaning is divided into a plurality of working blocks having a predetermined length, Since the washing of the entire length of the groundwater well is not performed at the same time, the foreign matter existing in the un-cleaned work block invades the cleaned work block, thereby deteriorating the cleaning efficiency of the cleaned work block .

The above-described prior arts 1 and 2 of cleaning the groundwater tank are limited to the removal of foreign matter adsorbed on the screen (inflow hole) provided at a certain interval in the groundwater tank and in the groundwater tank, And the clogging-induced contaminants generated in the aquifer around the outer surface of the groundwater canals were not effectively removed from the outer side of the screen (inflow hole) provided in the groundwater well.

On the other hand, since the agricultural groundwater is used for 3 months in the spring, which is the farming season, it is left during the year, and the clogging phenomenon progresses in the interval between the underwater motor pump and the screen (inflow hole) due to the minerals dissolved in the groundwater in the reservoir, And has a characteristic that the lifetime of the housing is shortened.

This shortened lifetime can be quantified by using the well efficiency (E). Using the relationship between the water head loss factor (C), which is the mathematical characteristic of the groundwater aquifer, and the aquifer loss coefficient (B) Lt; RTI ID = 0.0 > 1. ≪ / RTI >

At this time, the two loss coefficients (C, B) can be expressed by the following equation (2).

Here, Sw is the water level drop amount (m), and Q is the water amount (m ³ / day).

For example, in the case of a ground water well (ID, SD) installed at two places in a rural area, a stepwise transfer of water from the well water washing to the ground water well (ID, SD) After the test, the results of the calculation of the well head loss coefficient (C) and the aquifer loss coefficient (B) of the aquifer around the well were obtained from the experimental data saw.

As a result of the above tests, the aquifer head loss coefficient (B) in both groundwater wells (ID, SD) installed at two places did not show a large difference before and after the well washing, but in one groundwater well (IP) As shown in the experimental graph, the loss coefficient of the well head (C) decreased from 0.00005 before washing to 0.0000007 after washing, which is about 1/100 times lower than that of the well.

However, as shown in the experimental graph of FIG. 2, the difference in the loss coefficient (C) of the well head before and after the well washing is not substantially different in other groundwater wells (SD) there was.

The above results indicate that the well washing does not show a similar effect on all groundwater wells. In particular, in the case of the groundwater wells where the aquae loss coefficient (B) hardly decreases, It was confirmed that it is difficult to improve the well efficiency by the intermittent well washing method which proceeds through the apparatus.

Therefore, in order to improve the efficiency of the well, it is necessary to apply a technique that can cause a long-term continuous cleaning action.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a cleaning device for a washing machine, which has a length corresponding to a length of a groundwater in a groundwater well, , Effective removal of clogging-induced pollutants in the aquifer around the outer surface of the screen (inflow hole) provided in the groundwater well as well as the inside of the long-term groundwater well On the other hand, it eliminates the inconvenience of lifting the underwater motor pump from the underground water well to clean the underground water well, and allows the removed pollutant to be discharged directly to the ground through the underwater motor pump, In-situ groundwater flushing system considering well-efficiency improvement effect And a cleaning method thereof.

In order to achieve the above object, the in-situ groundwater flushing system considering the effect of improving the well efficiency of the present invention includes: a groundwater flushing system in which an underwater motor pump connected with a discharge line extending to the ground is installed; A cleaning member having a length corresponding to the length of the groundwater well and fixedly installed in the groundwater well; Wherein the cleaning member comprises: a multi-stage connection pipe arranged at a predetermined interval in the ground water pipe and guiding the flow of the cleaning gas supplied from the cleaning gas supply part on the ground surface in a compressed state; And a cleaning system connected between the connecting tubes constituting the multistage, wherein the washing gas is injected into the underground water well at the same pressure and flow rate through the injection hole while controlling the pressure and the flow rate of the compressed washing gas guided from the connecting tubes A multistage injection tube; .

In addition, the injection tube has a spiral first connection portion formed on the outer circumferential surface thereof while the injection hole is formed, and when the flow of the cleaning gas is guided from the connection tube body, the cleaning gas guided by the cleaning gas is received and then introduced into the injection hole A first extender for ejecting the water into the interior of the groundwater well; A compression unit for controlling the flow of the washing water in the first expansion unit so as to maintain a predetermined pressure and a flow rate without flowing through the injection hole; A second expanding part having a spiral second connection part formed on an outer circumferential surface thereof and spraying a cleaning gas whose pressure and flow rate are kept constant while the flow is controlled through the compression part to another injection tube at the lower end; .

The diameter of the first and second expanding portions may be the same, and the diameter of the compressed portion may be smaller than the diameter of the first and second expanding portions.

In addition, the inner circumferential surfaces of both ends of the connection tube constitute connection portions of the spiral corresponding to the first and second connection portions.

In addition, the cleaning gas supply unit may be fixedly installed in the groundwater well and connected to the connection pipe located on the ground surface through a direct connection or a hose.

The cleaning gas supply unit is a compressor for compressing and supplying the gas.

According to another aspect of the present invention, there is provided a method of cleaning a groundwater well by using an in-situ groundwater irrigation system considering the effect of improving the well efficiency, comprising the steps of: (a) connecting a cleaning gas supply unit to a connection body of a cleaning member fixedly installed inside a groundwater well; ; (b) controlling the flow of the cleaning gas in the connection tube and the spray tube included in the cleaning member when the gas is compressed in the cleaning gas supply unit and supplied to the cleaning member from the step (a) A step of keeping the flow rate constant; (c) a cleaning gas having a constant pressure and flow rate is ejected from the step (b) to the entire inside of the groundwater well, and the inside of the groundwater well as well as the outer side of the screen A process of removing pollutants generated in the aquifer around the filter media and the groundwater well; And (d) operating a submersible motor pump when the pollutants removed from the step (c) are accumulated on the lower side of the groundwater well, thereby discharging the pollutant to the ground through the discharge line; .

As described above, according to the present invention, a cleaning member, which has a length corresponding to the length of the groundwater in the groundwater well and simultaneously injects the cleaning gas at the same pressure and flow rate throughout the groundwater well, is fixedly installed. In addition to the inside of the tunnel, it is also possible to efficiently remove clogging-causing pollutants in the aquifer around the screen (inflow hole) and the aquifer near the groundwater well, It is possible to eliminate the inconvenience of lifting the underwater motor pump from the groundwater well and to discharge the removed pollutant directly to the ground through the underwater motor pump to improve the working efficiency in the groundwater tank cleaning, It is easier to clean the groundwater well by connecting only the supply part. While allowing it to be expected that the effect of improving the ease of maintenance.

1 is a graph of the relationship between the well head loss factor (C) for IP groundwater wells and the aquifer head loss factor (B) around the wells, calculated from the conventional step-wise test.
Figure 2 is a graph of the relationship between the well head loss factor (C) for the SD groundwater well and the aquifer head loss factor (B) around the well calculated from the conventional step waters test.
FIG. 3 is a general schematic view showing the structure of an in-situ groundwater well cleaning system considering the effect of improving the efficiency of wells according to an embodiment of the present invention. FIG.
4 is a schematic cross-sectional view showing the structure of a cleaning member according to an embodiment of the present invention.
5 is an enlarged cross-sectional view showing the structure of a jetting tube according to an embodiment of the present invention.
FIG. 6 is a flow chart of an in-situ groundwater well cleaning method considering the effect of improving the well efficiency according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings. However, it should be understood that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It will be understood by those of ordinary skill in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification.

In this specification, the terms "comprises" or "having ", and the like, specify that the presence of stated features, integers, steps, operations, elements, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

In addition, the embodiments described herein will be described with reference to cross-sectional views and / or plan views, which are ideal illustrations of the present invention. In the drawings, the thicknesses of the films and regions are exaggerated for an effective description of the technical content. Thus, the shape of the illustrations may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but may include variations in shapes that are created or required according to the manufacturing process. For example, the area shown at right angles may be rounded or may have a shape with a certain curvature. Thus, the regions illustrated in the figures have schematic attributes, and the shapes of the regions illustrated in the figures are intended to illustrate specific forms of regions of the apparatus and are not intended to limit the scope of the invention.

Like reference numerals refer to like elements throughout the specification. Accordingly, although the same reference numerals or similar reference numerals are not mentioned or described in the drawings, they may be described with reference to other drawings. Further, even if the reference numerals are not shown, they can be described with reference to other drawings.

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

FIG. 4 is a schematic cross-sectional view showing the structure of a cleaning member according to an embodiment of the present invention. FIG. 4 is a schematic cross-sectional view showing the structure of a cleaning member according to an embodiment of the present invention. 5 is an enlarged cross-sectional view showing the structure of a spray tube according to an embodiment of the present invention.

3 to 5, an in-situ groundwater cleaning system according to an embodiment of the present invention includes an underwater motor pump 10 connected to a discharge line 11 extending to the ground The cleaning member 30 is installed in the groundwater well 20 in parallel with the discharge line 11 so that the cleaning member 30 has a length corresponding to the length of the groundwater well 20 (31) and a spray tube (32).

The connection pipe 31 is arranged in a multi-stage manner at a predetermined interval in the groundwater pipe 20 and is connected to a cleaning gas supplied from the cleaning gas supply unit 100 on the ground surface in a compressed state such as nitrogen, Argon compressed gas, or the like).

The injection tube 32 is connected between the connection tubes 31 constituting the multi-stage tube. The injection tube P is connected to the injection tube P while adjusting the pressure and the flow rate of the compressed washing gas guided from the connection tubes 31, And the first and second expansion units 321 and 323 and the compression unit 322. The first and second expansion units 321 and 322 are disposed at the same pressure and flow rate as the first and second expansion units 321 and 322,

The first extension 321 has a spiral first connection part 321a formed on the outer circumferential surface thereof for connection with the connection tube 31 while the injection hole P is formed. The cleaning gas is guided when the flow of the cleaning gas is guided from the spray hole P to the inside of the groundwater tube 20 through the spray hole P.

The compression unit 322 is configured to control the flow of the washing gas so that the washing machine body flowing without being sprayed through the injection hole P from the first expansion unit 321 maintains a predetermined pressure and flow rate.

The second expansion portion 323 has a spiral second connection portion 323a formed on the outer circumferential surface thereof for connection with the connection tube 31. The flow of the second expansion portion 323 is controlled through the compression portion 322, So that the cleaning gas kept constantly is ejected to the other injection tube at the lower end.

The diameter d2 of the compression part 322 is smaller than the diameter d2 of the first and second expansion parts 321 and 323 When the washing machine body is introduced into the inside of the compression section 322 from the first expansion section 321, the cleaning gas flowing into the first expansion section 321 flows into the compression section 322 322 and the pressure and flow rate of the cleaning gas ejected from the second expansion portion 323 is diffused from the delayed action and the washing gas diffused from the second expansion portion 323 is diffused, The pressure and the flow rate of the cleaning gas guided from the pressure and the flow rate of the cleaning gas to the other injection tube 32 through the connection tube 31 at the lower end are equal to the pressure and flow rate of the spray tube 32 located at the tip thereof So that, with respect to the entire length of the groundwater well 20, (32), the cleaning of the entire inner wall in the groundwater tube (20) from the jetted cleaning gas has a slight parallax with the same pressure and flow rate, It can be done at the same time.

That is, the cleaning of the groundwater well 20 according to the embodiment of the present invention is performed by moving the cleaning member 30 along the groundwater well 20 at substantially the same time, The cleaning gas can be washed through the cleaning gas.

The inner circumferential surfaces of the opposite ends of the connection tube 31 constitute a connecting portion 31a of the spiral corresponding to the first and second connection portions 321a and 323a and the cleaning gas supplying unit 100 Is connected to the connection tube 31 located on the ground surface through a direct connection or a hose (not shown) while being fixed in the groundwater tube 20 as a compressor.

3 to 6, in the first step (a), the worker is fixedly installed in the groundwater well 20 by installing the groundwater well 21 in the groundwater well 20 in consideration of the effect of improving the well efficiency according to the embodiment of the present invention. The cleaning gas supply unit 100 on the ground is connected to the connection tube 31 of the cleaning member 30 directly or through a hose.

The connection pipe 31 is connected to the injection pipe 32 in a multistage manner and the connection pipe 31 connected to the purge gas supply unit 100 is connected to the injection pipe 32. [ And is located at the inlet side of the groundwater well 20.

In the next step (b), when the gas is compressed in the cleaning gas supplying unit 100 and then supplied to the cleaning member 30 from the step (a), the connection tube 31 included in the cleaning member 30, And the jetting tube 32 to maintain the pressure and the flow rate of the cleaning gas constant.

That is, when the cleaning gas compressed by the connection tube 31 located at the inlet side of the groundwater tube 20 is introduced, the cleaning gas flows along the connection tube 31 to the first expansion part 32 of the injection tube 32, The washing water is sprayed into the groundwater well 20 through the spray hole P formed in the first expansion part 321 while being guided by the spray hole 321, The pressure and the flow rate are adjusted while the flow is delayed in the compression unit 322, and then the second expansion unit 323 is guided.

Then, in the second expansion part 323, the washing machine body whose pressure and flow rate are controlled is diffused from the area in the second expansion part 323, and then is guided to the connection tube body 31 which is the next connection structure, The cleaning gas flowing along the inside of the first expansion portion 321 'flows into the first expansion portion 321' of the spray tube 32 which is the next connection structure, The washing gas which has not been sprayed through the injection hole P 'is delayed in the flow of the compressed gas by the compression unit 322' 2 expansion unit 323 'and by repeating the above description, the cleaning gas can maintain a certain pressure and flow rate to the injection tube 32 located at the lowermost end of the groundwater tube 20 .

As a result, in step (c), the cleaning gas having a constant pressure and flow rate from the step (b) is supplied to the first expansion parts 321, 321 ', ..., and 321 " (Not shown) provided in the underground water well 20, as well as the inside of the underground water well 20, while being blown into the entire inside of the underground water well 20 through the injection holes P, P ',. It is possible to remove contaminants caused by clogging occurring in the aquifer around the outer side filter material (filter medium) and the groundwater tube 20 through the inflow hole 21.

In the next step (d), the pollutants to be removed from the step (c) are accumulated on the bottom side of the groundwater well 20, and the accumulated pollutants are accumulated in the underwater motor pump 10 installed in the groundwater well 20, So that the pollutants are discharged to the ground through the discharge line 11 so that the outer side of the screen (inflow hole) provided in the groundwater tank 20 as well as the inside of the groundwater tube 20 ) And the aquifer around the groundwater well 20 can be quickly terminated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It does not.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It is to be understood that such changes and modifications are within the scope of the claims.

10; Submersible motor pump 11; Discharge line
20; Groundwater observation 21; screen
30; A cleaning member 31; Connection tube
31a; A connecting portion 32; Injection tube
321, 321 ', 321'
321a; The first connection portion
322, 322 ', 322 ", compression sections 323, 323', 323"; The second expanding portion
323a; A second connection portion 100; The cleaning gas supply portion
P, P ', P "; injection hole

Claims (6)

An underground water pump with an underwater motor pump connected to a discharge line extending to the ground; A cleaning member having a length corresponding to the length of the groundwater well and fixedly installed in the groundwater well; , ≪ / RTI >
Wherein the cleaning member comprises: a multi-stage connection pipe arranged at a predetermined interval in the groundwater pipe and guiding the flow of the cleaning gas supplied from the cleaning gas supply part on the ground surface in a compressed state; And a cleaning system connected between the connecting tubes constituting the multistage, wherein the washing gas is injected into the underground water well at the same pressure and flow rate through the injection hole while controlling the pressure and the flow rate of the compressed washing gas guided from the connecting tubes A multistage injection tube; And,
The injection tube has a first connection part formed on the outer circumferential surface of the injection tube while a spiral first connection part is formed, and a cleaning gas guided from the connection tube is received and then injected into the groundwater tube through the injection hole. A first extension having a first end; A compression unit having a second diameter smaller than the first diameter and delaying the flow so that the washing machine body flowing through the first expansion part without being sprayed through the injection hole maintains a constant pressure and flow rate; A second connecting portion formed on the outer circumferential surface with a diameter equal to the first diameter and having a second connecting portion formed on the outer circumferential surface thereof and having a pressure and a flow rate maintained constant while the flow is delayed through the compressed portion having the second diameter, A second expanding part for injecting the fuel into the injection tube; Wherein the at least one of the atmospheric water and the atmospheric air is introduced into the atmospheric air. delete delete The method according to claim 1,
Wherein the inner circumferential surfaces of both side ends of the connection tube constitute connection portions of spirals corresponding to the first and second connection portions. The method according to claim 1,
Wherein the cleaning gas supply unit is fixedly installed in the groundwater well and connected to the connection pipe located on the ground surface through a direct connection or a hose. (a) a first expansion portion having a multi-stage connection pipe body and a plurality of injection holes each having a first diameter between the connection pipes constituting the multi-stage, so as to extend from the inside of the groundwater pipe to the underwater motor pump, A cleaning unit to which a spray tube that is divided into a first expanding unit, a second expanding unit, and a compression unit having a second diameter smaller than the first diameter is fixed, and then connecting the cleaning gas supply unit to the connection tube near the ground;
(b) after the gas is compressed in the purge gas supply unit from the step (a), the flow of the purge gas, which is supplied when the purge gas is supplied to the connection pipe unit constituting the multistage, is delayed by the compression unit of the injection pipe, A step of keeping the pressure and the flow rate of the cleaning gas supplied to the connection tubes respectively constant;
(c) spraying a cleaning gas, which maintains a constant pressure and flow rate, to the entire interior of the groundwater well through the injection hole of the first expansion part, the flow rate of which is kept constant by the compression unit from the step (b) A process of removing pollutants generated in the aquifer around the outside of the screen (inflow hole) and the aquifer around the groundwater well, as well as the inside of the groundwater well; And
(d) activating an underwater motor pump when pollutants removed from the step (c) are accumulated on the lower side of the underground water well to discharge the pollutants to the ground through the discharge line; The method of claim 1, further comprising:

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