KR20240019564A - Intermittent pump and treatment system - Google Patents

Abstract

The intermittent pumping water treatment system according to the disclosed invention purifies contaminated water by pumping contaminated groundwater inside the ground, and includes a purification treatment unit that injects the purified groundwater into the ground, and a device that monitors the upstream water level based on the direction of groundwater flow. It includes a first monitoring unit, a second monitoring unit that monitors the downstream water level based on the direction of groundwater flow, and a purification processing unit, an operation unit connected to the first and second monitoring units to operate intermittent pumping and treatment of groundwater, and purification. The treatment unit includes a pumping unit that is connected to the inside of the ground and pumps contaminated water, an injection unit that is located downstream of the pumping unit based on the flow direction and injects purified groundwater into the ground, and is provided between the pumping unit and the injection unit to pollute the water. It includes a purification unit that purifies water, and the operation unit intermittently controls the pumping water treatment operation by adjusting the operation time, pumping time, and injection speed of the pumping unit and the injection unit. According to this configuration, active intermittent pumping operation is possible in response to the actual site, which is efficient in preventing the spread of pollutants.

Description

INTERMITTENT PUMP AND TREATMENT SYSTEM}

The present invention relates to an intermittent pumping water treatment system, and more specifically, to an intermittent pumping water treatment system capable of active intermittent pumping water treatment operation through adjustment of the arrangement of the pumping unit and injection unit, operating time, pumping speed, and injection speed.

In order to purify the contaminated site and prevent the spread of contamination, it is necessary to consider the hydrogeological conditions of the site and the resulting impact on groundwater flow. Purification reduces the level of contamination in the soil by removing contaminated groundwater from the underground environment. In addition, to prevent the spread of contamination, when there is groundwater flow in a specific direction, a certain width of the contaminated cloud is blocked to prevent leakage of contamination downstream of the baseline.

Pumped water treatment technology is a representative purification and contamination prevention technology, and its effectiveness varies depending on the installation and operation method of the pumped water treatment system. Meanwhile, pumping water treatment facilities require a manager to reside on site, so continuous operation is limited if the manager is unable to work 24 hours a day. In addition, in the case of intermittent amniotic fluid, there is a risk of leakage of contaminants during the resting period. Accordingly, in recent years, various studies have been continuously required to improve pumping water treatment efficiency by improving efficiency to prevent the spread of contamination.

Republic of Korea Patent Publication No. 10-2019-0028270 (Publication date: 2019.03.18) Republic of Korea Patent Publication No. 10-2014-0108759 (Publication date: 2014.09.15)

The purpose of the present invention is to improve the operation efficiency of active intermittent water treatment by adjusting the arrangement, operating time, pumping speed, and injection speed of the pumping unit that pumps contaminated water from the ground and the injection unit that purifies and injects it into the ground. It is intended to provide a pumping water treatment system.

The intermittent pumping water treatment system according to the present invention to achieve the above object purifies contaminated water by pumping contaminated groundwater inside the ground, and includes a purification treatment unit that injects the purified groundwater into the ground, and a flow direction of the groundwater. A first monitoring unit that monitors the upstream water level as a standard, a second monitoring unit that monitors the downstream water level based on the flow direction of the groundwater, and the purification treatment unit, connected to the first and second monitoring units, It includes an operation unit that operates intermittent pumping treatment, wherein the purification treatment unit is connected to the inside of the ground and pumps the contaminated water, and is located downstream of the pumping unit based on the flow direction, purified groundwater. An injection unit for injecting water into the ground, and a purification unit provided between the pumping unit and the injection unit to purify and process the contaminated water, wherein the operating unit controls the operation time, pumping speed, and injection speed of the pumping unit and the injection unit. and treat the amniotic fluid intermittently.

In addition, the pumping unit and the injection unit each include a pumping well and an injection well that extend to the aquifer of the ground and communicate with the inside and outside of the ground, and the pumping well is installed downstream from the contaminated area based on the direction of groundwater flow. , It is connected to a pump to pump the groundwater, and the injection well is provided at a location spaced apart from the pumping well to be paired with the pumping well, and may be installed downstream of the pumping well based on the flow direction of the groundwater.

In addition, the operating unit may operate and control the intermittent pumping amount and the continuous pumping amount of groundwater to be equal to each other.

In addition, the operating unit reflects the capture width (C _W ) of the pumping unit, the porosity (n) due to the depth (h) of the aquifer, and the hydraulic slope (Ki) between the first and second monitoring units, The operation is controlled using the following equation 1 so that the intermittent pumping amount (Qt) is equal to the continuous pumping amount (Q24),

[Equation 1]

Intermittent amniotic fluid volume (Qt) = Continuous amniotic fluid volume (Q24) = nhCwKi

The hydraulic slope is calculated by Ki=Δh/x, where h is the monitored water level difference between the first and second monitoring units and x may be the horizontal distance between the first and second monitoring units.

In addition, the operating unit operates and controls the continuous pumping speed (V24) and the intermittent pumping speed (V) according to the following equation 2,

[Equation 2]

V = V24 * r

Here, r may be 24 hours divided by the intermittent positive time (t).

In addition, the operating unit may arrange a plurality of injection units so that one of the pumping units faces each other in a radial direction, or may arrange a plurality of injection units so that the pumping unit and the injection unit face each other in one row or multiple rows.

In addition, the operating unit recovers the contaminated water by moving toward the injection unit based on the flow direction when the pumping water treatment operation is stopped, and then moving toward the pumping unit based on the flow direction when the pumping water treatment operation is restarted. The recovery area may be operated to provide a recovery area, but the recovery area may be operated to be located upstream of the injection unit with respect to the injection unit.

In addition, the operation unit operates the purification treatment unit to completely maintain the contaminated water in the first stage of intermittent pumping, and intermittent pumping to stop operation of the pumping unit to completely advance the contaminated water in the downstream direction based on the flow direction. The purification treatment unit may be operated and controlled, including a second pumping stage and an intermittent pumping third stage in which the pumping unit is re-operated to move the contaminated water upstream and recover it to the front.

In addition, the operating unit may operate and control the distance between the pumping unit and the injection unit so that the recovery area is provided in proportion to the pumping speed of the groundwater pumped from the pumping unit.

In addition, the operating unit may control the pumping speed of the contaminated water by monitoring changes in water levels within the pumping unit and the injection unit in conjunction with operation and suspension of pumping treatment of the purification treatment unit.

In addition, the operating unit calculates the hydraulic slope according to Equation 3 below based on the flow direction,

[Equation 3]

Hydraulic slope = {(upstream groundwater level) - (downstream groundwater level)} / (distance between the first and second monitoring units)

By comparing the hydraulic slope with a preset hydraulic slope, the pumping amount of the pumping unit and the injection speed of the injection unit can be adjusted.

In addition, the operation unit presets a first reference water level corresponding to the maximum water level of the aquifer in the ground and a second reference water level corresponding to the lowest water level of the aquifer, and the water levels measured by the first and second monitoring units. As the water level approaches the first reference level, the pumping speed and operating time of the pumping unit are increased and the injection speed of the injection unit is reduced, and the water level measured in the first and second monitoring units is at the second reference level. As it gets closer, the pumping speed and operating time of the pumping unit can be controlled to decrease and the injection speed of the injection unit can be increased.

An intermittent pumping treatment system according to another preferred aspect of the present invention purifies contaminated water by pumping contaminated groundwater inside the ground, and includes a purification treatment unit for injecting the purified groundwater into the ground, based on the flow direction of the groundwater. It includes a monitoring unit that monitors the upstream and downstream water levels, and an operating unit connected to the purification treatment unit and the monitoring unit to operate intermittent pumping and treatment of the contaminated water, wherein the purification treatment unit is connected to the inside of the ground and operates the contaminated water. A pumping unit for pumping water, an injection unit located downstream of the pumping unit based on the flow direction and injecting purified groundwater into the ground, and provided between the pumping unit and the injection unit to purify the contaminated water. and a purification unit, wherein the operating unit adjusts the operation time, pumping speed, and injection speed of the pumping unit and the injection unit to be the same as the pumped water amount during continuous purification treatment.

In addition, the pumping unit and the injection unit each include a pumping well and an injection well that extend to the aquifer of the ground and communicate with the inside and outside of the ground, and the pumping well is installed downstream from the contaminated area based on the direction of groundwater flow. , It is connected to a pump to pump the groundwater, and the injection well is provided to be spaced apart from the pumping well and face it, but may be installed downstream of the pumping well based on the direction of flow of the groundwater.

also, The monitoring unit may include a first monitoring unit that monitors a water level upstream of the pumping unit based on the flow direction, and a second monitoring unit that monitors a water level downstream of the injection unit based on the flow direction. .

In addition, the operating unit reflects the capture width (C _W ) of the pumping unit, the porosity (n) due to the depth (h) of the aquifer, and the hydraulic slope (Ki) between the first and second monitoring units, The operation is controlled using the following equation 1 so that the intermittent pumping amount (Qt) is equal to the continuous pumping amount (Q24),

[Equation 1]

Intermittent amniotic fluid volume (Qt) = Continuous amniotic fluid volume (Q24) = nhCwKi

The hydraulic slope is calculated by Ki=Δh/x, where h is the monitored water level difference between the first and second monitoring units and x may be the horizontal distance between the first and second monitoring units.

In addition, the operating unit operates and controls the continuous pumping speed (V24) and the intermittent pumping speed (V) according to the following equation 2,

[Equation 2]

V = V24 * r

Here, r may be 24 hours divided by the intermittent positive time (t).

In addition, the operating unit may arrange a plurality of injection units so that one of the pumping units faces each other in a radial direction, or may arrange a plurality of injection units so that the pumping unit and the injection unit face each other in one row or multiple rows.

In addition, the operating unit recovers the contaminated water by moving toward the injection unit based on the flow direction when the pumping water treatment operation is stopped, and then moving toward the pumping unit based on the flow direction when the pumping water treatment operation is restarted. It is operated to provide a recovery area, and the recovery area can be operated and designed to be located upstream of the injection unit with respect to the injection unit.

In addition, the operation unit operates the purification treatment unit to completely maintain the contaminated water in the first stage of intermittent pumping, and intermittent pumping to stop operation of the pumping unit to completely advance the contaminated water in the downstream direction based on the flow direction. The purification treatment unit may be operated and controlled, including a second pumping stage and an intermittent pumping third stage in which the pumping unit is re-operated to move the contaminated water upstream and recover it to the front.

In addition, the operating unit may operate and control the distance between the pumping unit and the injection unit so that the recovery area is provided in proportion to the pumping speed of the groundwater pumped from the pumping unit.

In addition, the operating unit may control the pumping speed of the contaminated water by monitoring changes in water levels within the pumping unit and the injection unit in conjunction with operation and suspension of pumping treatment of the purification treatment unit.

In addition, the operating unit calculates the hydraulic slope according to Equation 3 below based on the flow direction,

[Equation 3]

Hydraulic slope = {(upstream groundwater level) - (downstream groundwater level)} / (distance between the first and second monitoring units)

By comparing the hydraulic slope with a preset hydraulic slope, the pumping speed of the pumping unit and the injection speed of the injection unit can be adjusted.

In addition, the operation unit presets a first reference water level corresponding to the maximum water level of the aquifer in the ground and a second reference water level corresponding to the lowest water level of the aquifer, and the water levels measured by the first and second monitoring units. As the water level approaches the first reference level, the pumping speed and operating time of the pumping unit are increased and the injection speed of the injection unit is reduced, and the water level measured in the first and second monitoring units is at the second reference level. As it gets closer, the pumping speed and operating time of the pumping unit can be controlled to decrease and the injection speed of the injection unit can be increased.

According to the present invention having the above configuration, even if continuous pumping treatment is not possible for 24 hours on site, active intermittent pumping treatment control is possible. In particular, intermittent pumping treatment is possible with the same pumping amount as the continuous pumping amount, and the efficiency of preventing the spread of pollutants is excellent.

In addition, intermittent pumping treatment conditions can be adjusted in response to environmental conditions such as ground or climate, allowing flexibly responding to the pumping treatment site environment.

In addition, operating time and pumping amount can be minimized, thereby increasing the efficiency of preventing the spread of contamination in groundwater.

Figure 1 is a diagram schematically showing an intermittent pumping water treatment system according to a preferred embodiment of the present invention.
FIG. 2 is a schematic enlarged cross-sectional view and plan view of the pumping unit shown in FIG. 1.
FIG. 3 is an image schematically showing the pumping operation according to various intermittent pumping speeds of the intermittent pumping treatment system shown in FIG. 1.
Figure 4 is a graph schematically showing the decontamination rate of contaminated water according to the pumping time and the amount of contaminated water pumped during continuous and intermittent water treatment.
FIG. 5 is a side view schematically illustrating the pumping and injection operations of the purification processing unit shown in FIG. 1.
FIG. 6 is a graph schematically showing various embodiments of the operation time and operation interruption time of the intermittent pumping water treatment system shown in FIG. 1.
FIG. 7 is a schematic image showing the pumping performance evaluation index of the pumping unit shown in FIG. 1.
FIG. 8 is a diagram schematically illustrating the calculation of pumping volume based on the capture width and aquifer depth of the pumping well shown in FIG. 1.
FIG. 9 is a diagram schematically showing the state in which the pumping well and the injection well shown in FIG. 1 face each other within the capture width.
Figure 10 is a schematic diagram to explain the hydraulic slope of the aquifer.
Figure 11 is a graph schematically shown to compare the amount of pumping water during continuous and intermittent pumping.
Figure 12 is a diagram schematically showing various embodiments of arrangement of pumping wells and injection wells to prevent the spread of contamination.
Figure 13 is an image schematically showing the capture state of groundwater in pumping wells and injection wells arranged in rows 1 and 2.
FIG. 14 is a schematic diagram to explain the overall change in contaminated water according to the operating time of the intermittent pumping water treatment system shown in FIG. 1.
FIG. 15 is a diagram schematically showing the recovery area when the pumping speed of the intermittent pumping treatment system shown in FIG. 1 is low.
FIG. 16 is a diagram schematically showing the recovery area when the pumping speed of the intermittent pumping treatment system shown in FIG. 1 is high.
FIG. 17 is a graph schematically showing water level changes during operation and discontinuation of the intermittent pumping water treatment system shown in FIG. 1.
Figure 18 is a diagram schematically illustrating the first standard water level during heavy rain and the second standard water level during drought. and,
Figure 19 is a graph schematically showing the difference in monitored water levels between the first and second monitoring units measured according to seasonal changes.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the attached drawings. However, the spirit of the present invention is not limited to such embodiments, and the spirit of the present invention may be proposed differently by adding, changing, or deleting components constituting the embodiments, but this is also included in the spirit of the invention. It will happen.

Figure 1 shows that the intermittent pumping water treatment system 1 according to a preferred embodiment of the present invention includes a purification treatment unit 10, a first monitoring unit 20, a second monitoring unit 30, and an operating unit 40.

For reference, the intermittent pumping treatment system (1) described in the present invention is designed to prevent the spread of contamination by pumping groundwater contaminated by pollutants in an area with sufficient groundwater flow and then injecting it into purified groundwater. It's a system. In particular, the intermittent pumping water treatment system (1) described in the present invention is exemplified as being applied to intermittent pumping treatment in which polluted water is pumped and purified intermittently and then injected only at a certain time depending on field conditions.

The purification processing unit 10 pumps and purifies the contaminated water (W) contaminated by the contaminants (C) inside the ground (G), and injects the purified groundwater (W) into the ground. This purification processing unit 10 includes a pumping unit 11, an injection unit 12, and a purification unit 13.

As shown in (a) of FIG. 2, the pumping unit 11 pumps contaminated groundwater (W), that is, contaminated water (W), within an aquifer through which groundwater (W) of the ground (G) flows, at a constant flow rate. This pumping unit 11 is connected to a pumping well 11a that extends to the aquifer of the ground G and communicates with the inside and outside of the ground G, and a pumping pump 11b that is connected to the pumping well 11a and provides pumping force for pumping water. ) may include. At this time, the pumping well (11a) and the pumping pump (11b) are connected through the pumping line (11c), and the pumping pump (11b) is connected to the purification unit 13 shown in FIG. 1, thereby pumping through the pumping well (11a). The contaminated water (W) is provided to the purification unit (13) through the pumping line (11c).

As shown in (b) of Figure 2, the pumping unit 11 controls the flow of groundwater in the ground (G) through the formation of a capture section (Cz) of the contaminated water (W), and the flow path of the contaminated water (W) Efficient contamination removal is possible even within a limited area. As shown in FIG. 1, this pumping unit 11 is basically installed downstream of the area contaminated by the contaminants (C) based on the flow direction (F) of the groundwater (W).

Meanwhile, if continuous pumping is not possible at the site, intermittent pumping time can be adjusted for operation. Referring to FIG. 3, in order to explain intermittent pumping, a pumping treatment state is schematically shown in a state in which the pumping well 11a and the injection well 12a are arranged to face each other in the ground G.

Figure 3 (a) schematically shows the state of continuous pumping of contaminated water (W) in the ground (G). The contamination removal rate at this time can be calculated as 1-(Mass out)/(Mass in). V is the pumping speed, and the contamination removal rate during continuous pumping is 1. That is, Figure 3 (A) is a diagram schematically showing the case of continuous pumping. There is almost no contaminated groundwater (W) flowing downstream, so the contamination removal rate is close to 1.

On the other hand, Figures 3 (b) to (d) schematically show the state of intermittent pumping of contaminated water (W) in the ground (G). Figures 3 (b) to (d) schematically show the state of intermittent pumping treatment for 12 hours at pumping speeds of V, 1.8V, and 2V, respectively. Referring to Figures 3 (b) to (d), in intermittent pumping, contaminated groundwater (W) flows downstream and the contamination removal rate has a value lower than 1. In addition, as the pumping amount increases from Q to 2Q, the amount of contaminated groundwater (W) that escapes decreases, showing a tendency to increase the decontamination rate.

Figure 4 is a graph showing the contamination removal rate of the intermittent pumping treatment system (1) according to the pumping speed of contaminated groundwater (W). In the case of continuous pumping, the contamination removal rate gradually increased as the pumping speed increased, and the pumping speed when the contamination removal rate was 1 was defined as V. During intermittent pumping for 12 hours, the contamination removal rate reached 1 through a pumping speed of 1.8V, even though the pumping time was reduced by half compared to continuous pumping. In other words, if the intermittent pumping treatment system (1) is operated for a short operating time at a low pumping rate, a contamination removal rate similar to that of continuous pumping can be obtained.

The injection unit 12 is pumped from the pumping unit 11 and injects purified groundwater (W) into the ground (G). That is, the injection unit 12 purifies the contaminated water (W) pumped from the pumping unit 11 and then re-injects it into the ground (G), thereby allowing the groundwater (W) contaminated with the contaminants (C) to be pumped through the pumping unit (11). Prevents spread downstream of (11). This injection unit 12 forms a hydraulic boundary where the contaminated water (W) no longer spreads within the ground (G), thereby preventing the spread of the pollutants (C) and preventing the reduction of groundwater (W) resources.

Meanwhile, the injection unit 12 is provided so that the injection well 12a paired with the pumping well 11a of the pumping unit 11 enters the aquifer of the ground G, as shown in FIG. 5, so that the injection well 12a enters the ground G. The purified groundwater (W) is injected into the ground (G) from the purification unit (13) provided outside. The injection well 12a of the injection unit 12 is installed downstream of the pumping well 11a based on the flow direction (F) of groundwater (W). At this time, it is natural that the installation location and number of injection wells 12a may be changed in various ways depending on the conditions of the contaminated site.

For reference, a plurality of pumping wells 11a and injection wells 12a may be provided in parallel with each other and spaced apart from each other, as shown in FIG. 3, and the spacing, number, etc. of the pumping wells 11a and injection wells 12a, etc. is not limited to the example shown.

The purification unit 13 is provided on the ground surface between the pumping unit 11 and the injection unit 12, and purifies the contaminated water W. The purification technology of the purification unit 13 may be adopted as any one of various known purification technologies, and since it is not the subject matter of the present invention, detailed description will be omitted.

The first monitoring unit 20 measures the upstream water level based on the flow direction (F) of groundwater (W), and the second monitoring unit 30 measures the downstream water level based on the flow direction (F) of groundwater (W). is measured to monitor the level of contaminated water (W) for purification operation of the purification treatment unit 10. More specifically, based on the flow direction (F) of groundwater (W), the first monitoring unit 20 is located upstream of the pumping unit 11, and the second monitoring unit 30 is located higher than the injection unit 12. It is located downstream.

For reference, the first and second monitoring units 20 and 30 are determined so that the groundwater level of the first monitoring unit 20 is set to the second level with respect to the horizontal distance between the first and second monitoring units 20 and 30. By being located at a position higher than the groundwater level of the monitoring unit 30, a hydraulic slope is provided between the first and second monitoring units 20 and 30.

The operation unit 40 is connected to the purification treatment unit 10 and the first and second monitoring units 20 and 30, and operates intermittent pumping and treatment of groundwater (W). Here, the operation unit 40 operates and controls the operation time, pumping speed, injection speed, pumping water volume, and injection amount to enable active intermittent pumping water treatment of the pumping unit 11 and the injection unit 12. The purification operation control of the operation unit 40 will be described in more detail as follows.

The operation unit 40 operates intermittently by adjusting the pumping time when continuous pumping is not possible at a site where groundwater purification treatment is performed or for economical operation. Additionally, the operation department 40 may adopt an operation cycle that takes into account the working hours of the manager who manages the intermittent pumping water treatment system 1.

Referring to Figure 6, embodiments of operating hours and down times are schematically depicted. Figures 6 (a), (b), and (c) schematically show cases where groundwater (W) is pumped, purified, and injected for 1/2, 1/3, and 1/n of the day. That is, the operating hours of the purification processing unit 10 may be operated intermittently by the operation unit 40, such as 1/2, 1/3, or 1/n of the day, and the purification processing unit 10 may be operated intermittently during times other than the operating hours. operation is suspended.

Referring to FIG. 7, in order to explain the pumping performance evaluation index of the pumping unit 11, the pumping well 11a is schematically shown. In Figure 7, C _W is the width of the contaminated water (W) captured by the pumping well (11a), and d is the distance between the pumping wells (11a). Meanwhile, the distance between the pumping well 11a and the injection well 12a, which are adjacent to each other and face each other, may also be included in the pumping performance evaluation index.

The operation unit 40 calculates the pumping amount by reflecting the aquifer conditions of the ground (G) during the intermittent pumping treatment operation.

Referring to Figure 8, the calculation of pumping quantity using the capture width (C _W ) of the pumping well (11a) in the ground (G), depth of aquifer (h), porosity (n) and permeability coefficient is schematically shown, and Figure 9 shows The state in which the pumping well (11a) and the injection well (12a) face each other within the capture width (C _W ) is schematically shown. Figure 10 schematically shows the hydraulic slope between the first and second monitoring units 20 and 30. In FIG. 10, with respect to the horizontal distance (x) between the first and second monitoring units 20 and 30, the groundwater level of the first monitoring unit 20 is monitored more than the groundwater level of the second monitoring unit 30. It is located at a location as high as the difference in water level (Δh), and the resulting hydraulic slope (Ki) is approximately Ki=/x. Here, x is the distance between the first and second monitoring units 20 and 30.

Referring to Figure 11, the amniotic fluid amount during continuous pumping and the amniotic fluid amount during intermittent pumping are compared in graphs (a) and (b). As shown in (a) of FIG. 11, the amount of pumped water during continuous pumping is Q24, and as shown in (b) of FIG. 11, the amount of pumped water during intermittent pumping is Qt. At this time, the intermittent pumping amount can be calculated by reflecting the aquifer conditions of the site ground (G), and considering the porosity (n), capture width (C _W ), aquifer depth (h), and hydraulic slope (Ki), the operation department (40 ) operates and controls the pumping amount as shown in Equation 1 below.

[Equation 1]

Intermittent amniotic fluid volume (Qt) = Continuous amniotic fluid volume (Q24) = nhCwKi

That is, as shown in Equation 1, the operating unit 40 controls the continuous pumping amount and the intermittent pumping amount (Qt) to be equal to each other.

In addition, the operating unit 40 operates and controls the continuous pumping speed (V24) and the intermittent pumping speed (V) using Equation 2 below.

[Equation 2]

V = V24*r

Here, r is 24 hours divided by the intermittent positive time (t).

The purification treatment unit 10 can be designed as shown in FIG. 12 by taking into account the change in the overall surface area of contaminants according to the operation time during which the purification treatment is intermittently operated by the purification processing unit 10 and the formation of a recovery area due to the change in the overall surface of the pollutant. there is.

For example, a plurality of injection wells 12a are arranged to face each other in the radial direction with respect to one pumping well 11a as shown in (a) of FIG. 12, or a pumping well 11a is placed as shown in (b) of FIG. 12. The injection wells 12a can be arranged in one or two rows. Here, as shown in (b) of FIG. 12, a pair of injection wells 12a are arranged in one row with the pair of positive crystals 11a in between, or a plurality of injection wells are placed in one row. It can be arranged so that the pumping well (11a) is located and a plurality of injection wells (12a) are located in the second row. At this time, the plurality of pumping wells 11a and injection wells 12a arranged in the first and second rows face each other. For reference, the operating unit 40 may be designed so that the plurality of pumping wells 11a and the injection wells 12a are arranged in two or more rows, that is, in a plurality of rows, with the plurality of pumping wells 11a and the injection wells 12a facing each other.

Figure 13 (a) is an image showing the capture state of groundwater (W) of the pumping wells 11a and injection wells 12a arranged in one row, and Figure 13 (b) is an image showing the pumping wells 11a and injection wells 12a arranged in two rows. This is an image showing the state of groundwater capture in the injection well (12a). As shown in Figures 13 (a) and (b), it can be confirmed that the contaminated groundwater (W) does not spread downstream even if it is arranged in one or two or more rows. That is, even if a plurality of pumping wells 11a are arranged in one or two rows, leakage of contaminants, that is, contaminated water (W), does not occur between the pumping wells 11a. Meanwhile, the separation distance (d) between the plurality of pumping wells 11a can be designed so that the contaminated water (W) does not leak.

Referring to FIG. 14, after pumping groundwater (W) from the pumping well (11a), the overall progress of the contaminated water (W) generated during the operation interruption time (down period) when pumping water is not generated is schematically shown. As shown in (a) of FIG. 14, the contaminated water W moves in the downstream direction F1 during the idle period when purification treatment is not operated. At this time, as the front movement direction (F1) of the contaminated water (W) is toward the injection well (12a), leakage of the contaminated water (W) to the downstream where the injection well (12a) is provided may occur. Accordingly, as shown in (b) of FIG. 14, the operation unit 40 moves the recovery area (R) upstream of the injection well (12a) based on the injection well (12a) to prevent leakage of contaminated water (W) downstream. Designed and operated to be located in.

Referring to (b) of FIG. 14, the operation unit 40 controls the pumping operation of the pumping unit 11 to be performed in three stages. Specifically, the operation unit 40 completely maintains the contaminated water (W) by operating the intermittent pumping unit 11 in the intermittent pumping first stage (S1). In the second stage of intermittent pumping (S2), pumping operation by the pumping unit 11 is stopped. Contaminated water (W) moves entirely within the recovery area (R) in the downstream direction, and in the third intermittent pumping stage (S3), pumping operation is started again, so contaminated water (W) moves in the upstream direction and recovers to the front. do.

Referring to Figures 15 and 16, images comparing the width of the recovery area (R) according to the pumping speed are shown. As shown in (a) and (b) of Figure 15, the width of the recovery area (R) when the pumping speed is low (V), and as shown in (a) and (b) of Figure 16, the pumping speed is Comparing the width of the recovery area (R) in the case of 2 times higher (2V) compared to (a) and (b), the recovery area (R) in Figure 16 where the pumping speed is high is relatively wide. Accordingly, the separation distance is designed so that a recovery area (R) can be provided between the pumping unit 11 and the injection unit 12 according to the pumping speed.

As shown in FIG. 17, when operating intermittent pumping treatment, the geological medium can be characterized by monitoring the water level in the pumping well 11a during the operation interruption time and monitoring the water level recovery process. More specifically, the operation unit 40 monitors the water level in the aquifer when the intermittent pumping operation is stopped, as shown in (a) of FIG. 17, by comparing the water level when the operation is resumed. For reference, although not shown in detail, the water level monitoring of the operating unit 40 is performed by installing a sensor (not shown) capable of detecting the water level in the pumping well 11a and the injection well 12a, and measuring the water level through this. .

The results of this water level monitoring are shown in the graph in Figure 17 (b). That is, as shown in (b) of FIG. 17, during the pumping water purification operation, the water level of the pumping well (11a) gradually decreases and the water level of the injection well (12a) gradually increases, and when the pumping water purification treatment operation is stopped, the pumping well (11a) and the injection well (11a) gradually increase. The water level in well 12a becomes the same. The operation department 40 controls the pumping speed to form a target capture section by adjusting the operating conditions to reflect the characteristics of the geological medium for each section of the ground (G) calculated by monitoring the water level change during operation and interruption of pumping water purification treatment. It is done.

In addition, the operation unit 40 derives a hydraulic slope using the results of measuring the water level of groundwater (W) according to seasonal fluctuations, and adjusts the pumping amount of the pumping unit 11 and the operating time of the purification treatment unit 10 by considering this. Here, as shown in FIG. 18, a first monitoring unit 20 that measures the water level upstream based on the flow direction (F) of groundwater (W) and a second monitoring unit 30 that measures the water level downstream When installing, the first monitoring unit 20 is located at a distance greater than the water level influence range (A) of the groundwater (W) of the pumping unit (11), and the second monitoring unit (30) is located at a distance from the injection unit (12). ) is placed at a greater distance than the water level influence range (A) of the groundwater (W) (see Figure 1). In this way, the first and second monitoring units (20) (30) located at a distance greater than the water level influence range (A) of the groundwater (W) for each of the pumping unit (11) and the injection unit (12) are connected to the upstream and downstream groundwater The water level data of (W) is measured, and the operation unit 40 uses this to calculate the water slope in real time.

Here, the hydraulic slope is calculated by the following equation 3.

[Equation 3]

Hydraulic slope (Ki) = {(upstream groundwater level) - (downstream groundwater level)} / (distance between the first and second monitoring units)

In addition, the operation unit 40 actively controls the pumped water purification operation in response to the variable flow of groundwater (W) due to seasonal fluctuations. For example, during heavy rains such as during the summer rainy season, as the hydraulic slope increases and the flow rate of groundwater (W) in the aquifer increases, the operation unit 40 controls to increase the pumping speed and operating time through the purification treatment unit 10. At this time, if the level of the groundwater (W) increases and it is impossible to re-inject the purified groundwater (W) into the aquifer, the purified groundwater (W) can be drained into the river.

That is, the operation unit 40 preset the water level during heavy rain and the water level during drought as the first and second reference water levels (P1) (P2), respectively, as shown in FIG. 18, and then set the first and second reference water levels (P1). )(P2) is compared with the water level of the aquifer to control pumped water purification treatment operation. Therefore, the operation unit 40 can determine the pumping speed to maintain the capture width of the groundwater (W) captured by the pumping unit (11) uniformly even under variable water level conditions of the groundwater (W). For reference, as shown in FIG. 19, the monitored water level difference Δh between the first and second monitoring units 20 and 30 may continuously change larger or smaller depending on seasonal fluctuations.

Here, the first reference water level (P1) may be set to the maximum water level of the aquifer due to heavy rain, and the second reference water level (P2) may be set to the lowest water level of the aquifer due to drought. Therefore, the operation unit 40 compares the hydraulic slope with the preset hydraulic slope, that is, the first and second reference water levels (P1) (P2), and the pumping speed of the pumping unit 11 and the injection speed of the injection unit 12. control.

As described above, although the present invention has been described with reference to preferred embodiments, those skilled in the art may make various modifications and changes to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can do it.

1: Intermittent pumping water treatment system
10: Purification processing unit
11: amniotic fluid
11a: Yang Sujeong
12: injection part
12a: injection well
13: Purification Department
20: 1st monitoring department
30: Second monitoring department
40: Operations Department
G: ground
W: groundwater, contaminated water

Claims (24)

A purification processing unit that pumps and purifies contaminated groundwater inside the ground and injects the purified groundwater into the ground;
A first monitoring unit that monitors the upstream water level based on the direction of the groundwater flow;
a second monitoring unit that monitors the downstream water level based on the direction of groundwater flow; and
an operation unit connected to the purification treatment unit and the first and second monitoring units to operate intermittent pumping and treatment of the contaminated water;
Includes,
The purification processing unit,
A pumping unit connected to the inside of the ground to pump the contaminated water;
An injection unit located downstream of the pumping unit based on the flow direction and injecting purified groundwater into the ground; and
a purification unit provided between the pumping unit and the injection unit to purify the contaminated water;
Including,
An intermittent pumping water treatment system in which the operating unit intermittently treats pumping water by controlling the operation time, pumping speed, and injection speed of the pumping unit and the injection unit. According to paragraph 1,
The pumping unit and the injection unit each include a pumping well and an injection well that extend to the aquifer of the ground and communicate with the inside and outside of the ground,
The pumping well is installed downstream of the contaminated area based on the direction of groundwater flow, and is connected to a pump to pump the groundwater,
The injection well is provided at a location spaced apart from the pumping well to be paired with the pumping well, and is installed downstream of the pumping well based on the direction of flow of groundwater. According to paragraph 1,
An intermittent pumping treatment system in which the operating unit operates and controls the intermittent pumping amount and the continuous pumping amount of groundwater to be equal to each other. According to paragraph 3,
The operating department,
Reflecting the capture width (C _W ) of the pumping unit, the porosity (n) due to the depth (h) of the aquifer, and the hydraulic slope (Ki) between the first and second monitoring units, the intermittent pumping quantity (Qt) The operation is controlled using the following equation 1 to be equal to the continuous pumping quantity (Q24),
[Equation 1]
Intermittent amniotic fluid volume (Qt) = Continuous amniotic fluid volume (Q24) = nhCwKi
The hydraulic slope is calculated by Ki=Δh/x, where h is the monitored water level difference between the first and second monitoring units and x is the horizontal distance between the first and second monitoring units. system. According to paragraph 1,
The operating unit operates and controls the continuous pumping speed (V24) and the intermittent pumping speed (V) according to the following equation 2,
[Equation 2]
V = V24 * r
Here, r is an intermittent pumping system that is 24 hours divided by the intermittent pumping time (t). According to paragraph 1,
An intermittent pumping water treatment system in which the operating unit arranges a plurality of injection units so that one of the pumping units faces each other in a radial direction, or arranges a plurality of pumping units and injection units to face each other in one row or a plurality of rows. According to paragraph 1,
The operating department,
After the contaminated water moves toward the injection unit based on the flow direction when the pumping water treatment operation is stopped, it moves toward the pumping unit based on the flow direction when the pumping water treatment operation is restarted to provide a recovery area where it is recovered. Operate,
An intermittent pumping water treatment system in which the recovery area is operated to be located upstream of the injection unit with respect to the injection unit. According to paragraph 1,
The operating department,
A first step of intermittent pumping in which the purification treatment unit is operated to completely maintain the contaminated water;
A second step of intermittent pumping in which the operation of the pumping unit is stopped and the contaminated water is fully advanced in the downstream direction based on the flow direction; and
A third step of intermittent pumping in which the pumping unit is re-operated to move the contaminated water upstream and restore it to the front;
Including, an intermittent pumping water treatment system for operating and controlling the purification treatment unit. In clause 7,
The operating department,
An intermittent pumping treatment system that operates and controls the distance between the pumping unit and the injection unit so that the recovery area is provided in proportion to the pumping speed of the groundwater pumped from the pumping unit. According to paragraph 1,
The operating department,
An intermittent water pumping treatment system that controls the pumping speed of the contaminated water by monitoring changes in water levels in the pumping unit and injection unit in conjunction with the operation and suspension of pumping treatment of the purification treatment unit. According to paragraph 1,
The operating unit calculates the hydraulic slope according to Equation 3 below based on the flow direction,
[Equation 3]
Hydraulic slope = {(upstream groundwater level) - (downstream groundwater level)} / (distance between the first and second monitoring units)
An intermittent pumping system for controlling the pumping speed of the pumping unit and the injection speed of the injection unit by comparing the hydraulic slope with a preset hydraulic slope. According to clause 11,
The operating department,
Preset a first reference water level corresponding to the maximum water level of the aquifer of the ground and a second reference water level corresponding to the lowest water level of the aquifer,
As the water level measured by the first and second monitoring units approaches the first reference level, the pumping speed and operating time of the pumping unit are increased and the injection speed of the injection unit is reduced,
An intermittent pumping treatment system that controls to reduce the pumping speed and operating time of the pumping unit and increase the injection speed of the injection unit as the water level measured in the first and second monitoring units approaches the second reference level. A purification processing unit that pumps and purifies contaminated groundwater inside the ground and injects the purified groundwater into the ground;
a monitoring unit that monitors upstream and downstream water levels based on the direction of groundwater flow; and
An operation unit connected to the purification treatment unit and the monitoring unit to operate intermittent pumping and treatment of the contaminated water;
Includes,
The purification processing unit,
A pumping unit connected to the inside of the ground to pump the contaminated water;
An injection unit located downstream of the pumping unit based on the flow direction and injecting purified groundwater into the ground; and
a purification unit provided between the pumping unit and the injection unit to purify the contaminated water;
Including,
An intermittent pumping water treatment system in which the operating unit adjusts the operation time, pumping speed, and injection speed of the pumping unit and the injection unit to be the same as the pumped water amount during continuous purification treatment. According to clause 13,
The pumping unit and the injection unit each include a pumping well and an injection well that extend to the aquifer of the ground and communicate with the inside and outside of the ground,
The pumping well is installed downstream of the contaminated area based on the direction of groundwater flow, and is connected to a pump to pump the groundwater,
The injection well is provided to be spaced apart from the pumping well and is installed downstream of the pumping well based on the flow direction of the groundwater. According to clause 13,
The monitoring unit,
a first monitoring unit that monitors a water level upstream of the pumping unit based on the flow direction; and
a second monitoring unit that monitors the water level downstream of the injection unit based on the flow direction;
An intermittent pumping water treatment system including. According to clause 13,
The operating department,
Reflecting the capture width (C _W ) of the pumping unit, the porosity (n) due to the depth (h) of the aquifer, and the hydraulic slope (Ki) between the first and second monitoring units, the intermittent pumping quantity (Qt) The operation is controlled using the following equation 1 to be equal to the continuous pumping quantity (Q24),
[Equation 1]
Intermittent amniotic fluid volume (Qt) = Continuous amniotic fluid volume (Q24) = nhCwKi
The hydraulic slope is calculated by Ki=Δh/x, where h is the monitored water level difference between the first and second monitoring units and x is the horizontal distance between the first and second monitoring units. system. According to clause 13,
The operating unit operates and controls the continuous pumping speed (V24) and the intermittent pumping speed (V) according to the following equation 2,
[Equation 2]
V = V24 * r
Here, r is an intermittent pumping system that is 24 hours divided by the intermittent pumping time (t). According to clause 13,
An intermittent pumping water treatment system in which the operating unit arranges a plurality of injection units so that one of the pumping units faces each other in a radial direction, or arranges a plurality of pumping units and injection units to face each other in one row or a plurality of rows. According to clause 13,
The operating department,
After the contaminated water moves toward the injection unit based on the flow direction when the pumping water treatment operation is stopped, it moves toward the pumping unit based on the flow direction when the pumping water treatment operation is restarted to provide a recovery area where it is recovered. Operate,
An intermittent pumping water treatment system in which the recovery area is operated to be located upstream of the injection unit with respect to the injection unit. According to clause 13,
The operating department,
A first step of intermittent pumping in which the purification treatment unit is operated to completely maintain the contaminated water;
A second step of intermittent pumping in which the operation of the pumping unit is stopped and the contaminated water is fully advanced in the downstream direction based on the flow direction; and
A third step of intermittent pumping in which the pumping unit is re-operated to move the contaminated water upstream and restore it to the front;
Including, an intermittent pumping water treatment system for operating and controlling the purification treatment unit. According to clause 19,
The operating department,
An intermittent pumping treatment system that operates and controls the distance between the pumping unit and the injection unit so that the recovery area is provided in proportion to the pumping speed of the groundwater pumped from the pumping unit. According to clause 13,
The operating department,
An intermittent water pumping treatment system that controls the pumping speed of the contaminated water by monitoring changes in water levels in the pumping unit and injection unit in conjunction with the operation and suspension of pumping treatment of the purification treatment unit. According to clause 13,
The operating unit calculates the hydraulic slope according to Equation 3 below based on the flow direction,
[Equation 3]
Hydraulic slope = {(upstream groundwater level) - (downstream groundwater level)} / (distance between the first and second monitoring units)
An intermittent pumping system for controlling the pumping speed of the pumping unit and the injection speed of the injection unit by comparing the hydraulic slope with a preset hydraulic slope. According to clause 23,
The operating department,
Preset a first reference water level corresponding to the maximum water level of the aquifer of the ground and a second reference water level corresponding to the lowest water level of the aquifer,
As the water level measured by the first and second monitoring units approaches the first reference level, the pumping speed and operating time of the pumping unit are increased and the injection speed of the injection unit is reduced,
An intermittent pumping treatment system that controls to reduce the pumping speed and operating time of the pumping unit and increase the injection speed of the injection unit as the water level measured in the first and second monitoring units approaches the second reference level.

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