KR101746382B1 - System and method for gas injection-extraction in soil using hirizontal well - Google Patents
System and method for gas injection-extraction in soil using hirizontal well Download PDFInfo
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- KR101746382B1 KR101746382B1 KR1020160003825A KR20160003825A KR101746382B1 KR 101746382 B1 KR101746382 B1 KR 101746382B1 KR 1020160003825 A KR1020160003825 A KR 1020160003825A KR 20160003825 A KR20160003825 A KR 20160003825A KR 101746382 B1 KR101746382 B1 KR 101746382B1
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- gas
- soil
- extraction
- gas injection
- horizontal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/005—Extraction of vapours or gases using vacuum or venting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Abstract
Disclosed is a gas infusion-extraction system and a method for purifying contaminated soil using horizontal vessels capable of increasing the pollutant removal efficiency while reducing the number of perforations in the groundwater. In situ gas injection-extraction systems using horizontal gauges include gas injection devices, gas extraction devices and horizontal gauge assemblies to purify contaminated soil by injecting decontamination agents into the contaminated soil to extract contaminants. A gas injector forcibly injects gas into the soil. The gas extraction device extracts the gas of the soil. The horizontal gauge assembly comprises a plurality of unitary units connected in series and horizontally buried in the contaminated soil, injecting the gas provided by the gas injection regulator into the soil, or volatilized contamination which is vaporized between the pores of the soil and discharged with the gas And a horizontal tubular assembly that extracts material or sub-volatile contaminants under the control of a gas extraction device. Here, each of the well units independently performs the gas injection operation and the gas extraction operation.
Description
The present invention relates to a system for injecting and extracting a gas in a soil using a horizontal vessel, and more particularly, to a system for injecting and extracting a gas in a soil using a horizontal vessel capable of increasing pollutant removal efficiency while reducing the number of perforations in the vessel, Extraction system and method thereof.
As the industrialization accelerates and the oil consumption increases rapidly, the oil storage facilities and the transportation volume increase proportionally and the soil pollution by oil is becoming serious environmental problem.
Techniques for restoration of oil-contaminated soils are classified into physical, chemical and biological techniques according to the restoration method. It is classified into In-situ and Ex-situ technologies depending on the restoration location.
Among the technologies used in the underground treatment technology, the air between the soil is formed at a pressure gradient lower than the atmospheric pressure, and the soil is vacuumed. Thus, when the air is extracted outside, the volatile, quasi-volatile Soil Vapor Extraction (SVE), which utilizes the principle that pollutants are vaporized and discharged together with air, and a biological ventilation method (BV) which increases the activity of microorganisms by forcing the air into the soil to increase the oxygen concentration of the soil : Bio Ventiong).
However, the soil vapor extraction method is relatively easy to install, is inexpensive and is suitable for restoration of widely polluted soil, but can not purify polluted sources of saturated soil or ground water, and biological ventilation method requires a lot of purification time .
On the other hand, in the conventional contaminated soil purification system, when an area having a high pollution frequency due to oil is set in a site inspection of a petrochemical plant or a gas station where pollution areas are prone to occur, the contamination of the oil And the pollutants are extracted.
However, in order to extract the pollutants from the contaminated space using the above-mentioned vertical pipes, it is difficult to determine the location of the pollutants by the size of the equipment in order to make the vertical pipes in the facilities having a relatively narrow space, There is a problem in that it affects the production work to be carried out in the production line.
In addition, it is difficult to excavate in a contaminated space such as a lower part of a building using a vertical tunnel, and it is difficult to avoid the object of interference when there is a lot of underground interference objects such as underground buried objects in a contaminated space in the ground.
In addition, a large number of vertical tunnels are required to meet the contaminated range, but this may be due to the fact that extraction of waste oil through vertical tunnels is very difficult to install, and facilities may be damaged There was a problem.
In addition, when the groundwater layer is monitored using the vertical well, there is a problem that it is difficult to recover the free phase oil (floating state of the groundwater layer) due to the error of the groundwater layer due to the capillary phenomenon and the seasonal variation of the groundwater level .
SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a method and apparatus for reducing pollutant removal efficiency, To provide an in-situ gas injection-extraction system.
It is another object of the present invention to provide a method for injecting and extracting gas in soil using a gas injection-extraction system in a soil using the above-mentioned horizontal gauge.
In order to realize the object of the present invention described above, a gas injection-extraction system using a horizontal pipe according to an embodiment of the present invention purifies a contaminated soil by injecting a decontamination agent into the contaminated soil to extract pollutants. The system for injecting and extracting gas in soil using the horizontal gauge comprises: a gas injector for forcibly injecting gas into the soil; A gas extraction device for extracting the gas of the soil; And a plurality of volumetric units connected in series and horizontally buried in the contaminated soil, injecting the gas provided by the gas injection adjusting apparatus into the soil, or volatile pollutants which are vaporized between the pores of the soil and discharged together with the gas or And a horizontal tubular assembly for extracting semi-volatile contaminants under the control of the gas extraction device. Herein, each of the unitary units independently performs a gas injection operation and a gas extraction operation.
In one embodiment, an in-soil gas injection-extraction system using horizontal vessels further comprises a controller coupled to the gas injection device and the gas extraction device, wherein the controller is operable to independently perform the gas injection operation and the gas extraction operation of the gauge units .
In one embodiment, each of the coronary units may include a perforated shaft in which the slots are formed, and a non-interposed portion in which the slots are not formed.
In one embodiment, the horizontal tubular assembly includes: a connecting member disposed between the tubular units and connecting the tubular units to each other; And a zone separation barrier disposed adjacent to the connection member within the horizontal vessel to separate the polluted purification zone.
In one embodiment, the area partitioning barriers are disposed at each of both ends of one corrugated unit, the non-coplanar part corresponds to the area partition wall, and one perforated part is formed in one corrugated unit.
In one embodiment, the region partitioning barriers are disposed at both ends of one coronary unit, the non-coplanar portion corresponds to each of the middle regions of the region partitioning barriers and the horizontal channel, Can be formed.
In one embodiment, the connecting member can be fused in the horizontal vessel.
In one embodiment, the material of the region separation barrier may include at least one of urethane and epoxy.
In one embodiment, the horizontal tubular assembly further comprises pneumatic hoses connected to the gas injection device and disposed in the horizontal tubular, each of the pneumatic hoses passing through each of the holes formed in the zone dividing wall .
In one embodiment, the zone dividing wall may be formed with a hole to allow the pneumatic hose to pass therethrough.
In one embodiment, the number of pneumatic hoses may be equal to the number of pollution control areas separated by the zone dividing wall.
In one embodiment, the pneumatic hoses may have different lengths such that the ends of each of the pneumatic hoses are disposed in different pollution clean areas.
In one embodiment, the horizontal canal assembly is connected to an end of each of the pneumatic hoses, and is disposed adjacent to the perforated shaft to discharge gas to be supplied to the soil, or to remove vaporized volatile contaminants Or a plurality of nozzles for extracting semi-volatile contaminants.
According to an embodiment of the present invention, there is provided a horizontal tubular assembly including a plurality of tubular unit units connected in series for purifying contaminated soil by injecting a decontamination agent into the contaminated soil to extract contaminants, It is buried horizontally in contaminated soil. The decontamination agent is then fed to the horizontal tubular assembly to be injected into the contaminated soil. Volatile contaminants or quasi-volatile contaminants introduced with the decontamination agent into the horizontal clearance assembly are then removed to the ground.
In one embodiment, when a gas is injected into each of the polluted purification regions, a gas injection amount or injection amount per hour is set for each polluted purification region. Then, the amount of gas injected is measured in real time through a digital flow meter. If the measured gas injection amount is less than the set gas injection amount, the digital valve is opened. If the measured gas injection amount is larger than the set gas injection amount, the digital valve is closed. Then, information including flow rate, pressure and temperature is recorded.
In one embodiment, when the gas is extracted by the polluted purification region, a gas extraction amount per hour or a gas extraction pressure is set for each polluted purification region. If the amount of extracted gas is small, the rotation of the vacuum pump is increased. If the amount of extracted gas is large, the rotation of the vacuum pump is reduced. Even when the pressure is adjusted by the gas extraction pressure, the pressure is measured in real time through the digital pressure gauge. If the sound pressure is small, the number of revolutions of the vacuum pump is increased. If the sound pressure is large, the number of revolutions of the vacuum pump is decreased. Then, information including flow rate, pressure and temperature is recorded.
According to the gas injection-extraction system and the method using the horizontal gauge, it is possible to exert a better pollutant removal efficiency even by the perforation of less duct than the contaminated soil purification technology through the vertical gauge, Cost and time can be saved. In addition, it is possible to purify soil pollution by extracting pollutants through a tunnel even in areas where vertical tunneling is not possible, such as underground structures.
FIG. 1 is a schematic view for explaining a gas injection-extraction system in a soil using a horizontal pipe according to an embodiment of the present invention.
Fig. 2 is a schematic diagram for schematically explaining the region A shown in Fig.
FIG. 3 is a schematic diagram for schematically illustrating a pneumatic hose disposed in the horizontal pipe assembly shown in FIG. 1. FIG.
FIG. 4 is a perspective view schematically illustrating the region separation barrier shown in FIG. 3. FIG.
5 is a schematic view for explaining an example of the tubular unit shown in Fig.
6 is a plan view for schematically explaining the gas pressure distribution by the injection gas concentration distribution or the extraction by the injection unit made up of the tubular unit shown in FIG.
7 is a schematic view for explaining another example of the tubular unit shown in Fig.
FIG. 8 is a plan view schematically illustrating the gas pressure distribution by injection or the injection gas concentration distribution by injection performed by the tubular unit shown in FIG. 7. FIG.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in more detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.
The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. The singular expressions include plural expressions unless the context clearly dictates otherwise.
In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
Also, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.
FIG. 1 is a schematic view for explaining a gas injection-extraction system in a soil using a horizontal pipe according to an embodiment of the present invention. Fig. 2 is a schematic diagram for schematically explaining the region A shown in Fig. FIG. 3 is a schematic diagram for schematically illustrating a pneumatic hose disposed in the horizontal pipe assembly shown in FIG. 1. FIG. FIG. 4 is a perspective view schematically illustrating the region separation barrier shown in FIG. 3. FIG.
1 to 4, a gas injection and extraction system using a horizontal vessel according to an embodiment of the present invention includes a
The
To automatically regulate the gas injection per region, set the gas injection rate or mass per hour per region. In the case of the individual regions, it is possible to set the amount of injection to change with time. Next, the injection amount is measured in real time through a digital flow meter, and if the injection amount is small, the digital valve is opened, and if it is large, the valve is closed. At this time, all data such as flow rate, pressure and temperature are automatically recorded.
The
To automatically control the gas extraction by region, set the gas extraction volume per hour or extraction pressure for each zone. Preferably, it is adjusted within the performance of the vacuum pump. It is possible to set to change the extraction amount or the extraction pressure according to the time in the case of the individual area.
When adjusting the extraction amount, the extraction amount is measured in real time through the digital flow meter. If the extraction amount is small, the rotation of the vacuum pump is increased. When the extraction amount is large, the rotation of the vacuum pump is decreased.
On the other hand, even in the case of controlling by the extraction pressure, the pressure is measured in real time through the digital pressure gauge to increase the number of revolutions of the vacuum pump when the sound pressure is small, and decrease the number of revolutions of the vacuum pump when the sound pressure is large. At this time, all data such as flow rate, pressure and temperature are automatically recorded.
The horizontal
The
In this embodiment, the horizontal
The connecting
A plurality of pneumatic hoses (340) are disposed in the horizontal tubular assembly (300). The
The material of the
At least one hole is formed in the
Each of the
For example, as shown in FIGS. 5 and 6, a
As another example, as shown in FIGS. 7 and 8, a
In the following, a gas injection-extraction method using a horizontal gutter to purify contaminated soil by injecting a decontamination agent into a contaminated soil through a gas injection-extraction system using a horizontal gutter according to the present invention Will be briefly described.
First, the horizontal
The
The
Here, when the
On the other hand, when the
5 is a schematic view for explaining an example of the tubular unit shown in Fig. 6 is a plan view for schematically explaining the gas pressure distribution by the injection gas concentration distribution or the extraction by the injection unit made up of the tubular unit shown in FIG.
5 and 6, a
A connection member 320 (shown in Fig. 2) and a zone separation barrier 330 (shown in Fig. 2) are disposed corresponding to the
When the gas injection operation or the gas extraction operation is performed, the gas concentration distributions due to the injection are defined as one unit or the gas pressure distributions according to the extraction are defined separately. That is, since the non-hollow portion is formed in both end regions of one
7 is a schematic view for explaining another example of the tubular unit shown in Fig. FIG. 8 is a plan view schematically illustrating the gas pressure distribution by injection or the injection gas concentration distribution by injection performed by the tubular unit shown in FIG. 7. FIG.
7 and 8, a
A connecting member 320 (shown in Fig. 2) and a zone dividing barrier 330 (shown in Fig. 2) are disposed corresponding to the
When the gas injection operation or the gas extraction operation is performed, the gas concentration distributions due to the injection are defined as one unit or the gas pressure distributions according to the extraction are defined separately. In other words, the
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 or scope of the invention as defined in the appended claims. You will understand.
As described above, according to the present invention, the horizontal tubular assembly includes a plurality of unitary units connected in series and horizontally buried in the contaminated soil to inject the gas provided by the gas injection adjusting apparatus into the soil, Volatile contaminants or quasi-volatile contaminants that are vaporized in the vaporization apparatus and discharged together with the gas are extracted under the control of the gas extraction apparatus. Thus, it is possible to reduce the cost and time required for perforation drilling by allowing the pollutant removal efficiency to be improved even by drilling less holes than the contaminated soil purification technology through the vertical tunnel. In addition, it is possible to purify soil pollution by extracting pollutants through a tunnel even in areas where vertical tunneling is not possible, such as underground structures.
100: gas injection device 200: gas extraction device
300: horizontal tubular assembly 310:
312: Perforation executive 314: Non-executive officer
320: connecting member 330: zone separating barrier
340: Air pressure hoses 400: Controller
450: Switching valve
Claims (16)
The gas injector forcibly injects the gaseous decontamination agent into the contaminated soil through the horizontal tubular assembly, automatically regulates and records the amount of gas injected into each zone,
The gas extracting apparatus extracts the contaminated soil gas through the horizontal tubular assembly, automatically regulates and records the gas extraction amount for each region,
The horizontal tubular assembly includes a plurality of unitary units connected in series and horizontally buried in the contaminated soil and disposed in an unsaturated zone on the aquifer, the gas provided from the gas injector being injected into the contaminated soil, Extracting volatile pollutants or quasi-volatile pollutants that are vaporized between the pores of the contaminated soil and discharged together with the gas under the control of the gas extraction apparatus,
Wherein each of the rectangular unit includes a hollow shaft portion in which slots are formed and a non-hollow portion in which slots are not formed, wherein the hollow unit is formed in the both end regions and the central region and the hollow shaft portion is formed in the remaining region,
Wherein the horizontal tubular assembly further comprises a connecting member for connecting the tubular units to each other and a zone dividing wall for separating the polluted cleaning zone,
Wherein the connection member is disposed between the connection units and connects the connection units to each other, the connection members being fused to permanently or semi-permanently connect adjacent fitting unit units, Wherein the connection member is disposed adjacent to the connection member and separates the polluted cleaning area and includes a urethane epoxy material,
The horizontal tubular assembly is provided with a plurality of pneumatic hoses connected to each of the gas injector and the gas extracting device via a switching valve, the switching valve being responsive to the control of the controller, A passage between the assemblies or a passage between the horizontal conduit assembly and the gas extraction device,
Wherein the pneumatic hoses are made of a urethane material and have a diameter of 10 mm to 12 mm and are connected to the gas injection device and disposed in the hall element units,
A plurality of nozzles for gas outflow are connected to the ends of the pneumatic hoses, respectively. The gas is injected toward the contaminated soil through the nozzles, and the vaporized contaminants existing between the pores of the contaminated soil Is extracted,
Wherein at least one of the pneumatic hoses is formed in the region partition wall so as to allow the pneumatic hose to pass therethrough, and the number of the pneumatic hoses is equal to the number of the pollution clean areas divided by the region partition wall, The number of the holes formed in the zone dividing wall arranged to separate the polluted and purified area from the gas injection device or the gas extraction device, A smaller number of holes are formed in the region separation barrier,
Each of the unitary units independently performs a gas injection operation and a gas extraction operation,
Wherein the controller is connected to the gas injection device and the gas extraction device so as to independently control the gas injection operation and the gas extraction operation of the nozzle units so that each of the nozzle units is activated independently of each other, A gas injection operation can be performed and deactivated, and each of the unitary units can be activated independently of each other to perform the gas extraction operation through the gas extraction unit and can be deactivated,
Wherein the decontamination agent comprises compressed liquefied nitrogen, oxygen, carbon dioxide or compressed air,
The gas injection device includes a flow rate regulating valve and a digital flow meter, a pressure gauge, and a thermometer located at a rear end of the injection amount regulating valve,
The gas extracting apparatus includes a vacuum pump for each region, a digital pressure gauge installed in front of the suction portion of the vacuum pump for each region, and a digital flow meter and a thermometer located at a portion where the gas is discharged from the vacuum pump for each region Lt; RTI ID = 0.0 > injection-extraction < / RTI &
A method for injecting and extracting gas into a soil using the horizontal conduit for purifying the contaminated soil by injecting the decontamination agent into the contaminated soil to extract the contaminant,
Burying the horizontal tubular assembly including the plurality of tubular units linked in a row horizontally in the contaminated soil in a region where the vertical tubular tubular structure such as the lower part of the building is not drilled;
Supplying the gas containing the decontamination agent to the horizontal pipe assembly and injecting the gas into the contaminated soil; And
And removing the gas containing the volatile pollutants or the quasi-volatile pollutants introduced into the horizontal pipe assembly together with the decontamination agent to the ground,
Setting a gas injection amount or an injection mass per unit time for each of the polluted cleaning areas;
Measuring the gas injection amount in real time through the digital flow meter;
Opening the digital valve when the measured gas injection amount is less than the set gas injection amount and closing the digital valve when the measured gas injection amount is larger than the set gas injection amount; And
Further comprising the step of recording information including flow rate, pressure and temperature,
The soil member units are made of PE material and the diameter of the soil canning units is 100 mm to 150 mm so that the contaminants are extracted through the tunneling units even in the case where the vertical can not be perforated, Which is characterized in that the gas is injected into the soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160003825A KR101746382B1 (en) | 2016-01-12 | 2016-01-12 | System and method for gas injection-extraction in soil using hirizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160003825A KR101746382B1 (en) | 2016-01-12 | 2016-01-12 | System and method for gas injection-extraction in soil using hirizontal well |
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| KR101746382B1 true KR101746382B1 (en) | 2017-06-27 |
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| KR1020160003825A KR101746382B1 (en) | 2016-01-12 | 2016-01-12 | System and method for gas injection-extraction in soil using hirizontal well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101994335B1 (en) | 2018-10-25 | 2019-06-28 | 주식회사 지오그린21 | Inclined pipe and install method thereof |
| CN109985897A (en) * | 2019-03-27 | 2019-07-09 | 南京贻润环境科技有限公司 | It is a kind of for underground water and the horizontal reverse Ying Jing of soil remediation |
-
2016
- 2016-01-12 KR KR1020160003825A patent/KR101746382B1/en active IP Right Grant
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101994335B1 (en) | 2018-10-25 | 2019-06-28 | 주식회사 지오그린21 | Inclined pipe and install method thereof |
| CN109985897A (en) * | 2019-03-27 | 2019-07-09 | 南京贻润环境科技有限公司 | It is a kind of for underground water and the horizontal reverse Ying Jing of soil remediation |
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