KR101615364B1 - Apparatus For Detecting Soil Pollution In Subsurface - Google Patents

Apparatus For Detecting Soil Pollution In Subsurface Download PDF

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KR101615364B1
KR101615364B1 KR1020150191112A KR20150191112A KR101615364B1 KR 101615364 B1 KR101615364 B1 KR 101615364B1 KR 1020150191112 A KR1020150191112 A KR 1020150191112A KR 20150191112 A KR20150191112 A KR 20150191112A KR 101615364 B1 KR101615364 B1 KR 101615364B1
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South Korea
Prior art keywords
gas
tube
underground
porous
ground
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KR1020150191112A
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Korean (ko)
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김주영
한장희
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(주)동명엔터프라이즈
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G01M3/223—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for pipe joints or seals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

According to the present invention, there is provided a porous pipe embedded in the vicinity of an underground facility where leakage is expected; A tube connected to the porous tube and extending to the ground; A suction pump installed on the ground to suck the underground gas by applying negative pressure to the porous pipe through the tube; And a gas analyzer for analyzing the underground gas provided by the suction pump.

Figure R1020150191112

Description

[0001] The present invention relates to a soil contamination detecting device,

The present invention relates to an apparatus for detecting soil contamination in the ground, and more particularly, to a device capable of detecting a change in the ground body when a soil polluting material from an underground facility leaks.

Underground facilities and underground facilities that are buried or installed underground are potential soil pollutants that can disturb the underground environment. For example, oil leaks from oil storage tanks and piping in underground gas stations disturb the underground environment and directly pollute the soil.

In addition, soil and groundwater may be contaminated due to corrosion and aging of underground facilities, and the underground environment may be disturbed by breakage or aging of drainage pipes, sewage pipes, city gas pipes, electric wiring pipes, optical cable pipes, etc. extending underground .

Typically, when oil or hazardous materials begin to leak underground, leakage can be detected by measuring the flow rate reduced by leakage or only when the pollutant can be detected directly. For example, if oil is leaked from an underground storage tank or piping at a gas station, a decrease in the oil storage of the storage tank is measured, or leakage oil leaking into the soil is detected through a sensing device embedded in the ground.

However, there is a case where the oil leakage can not be accurately detected by the sensing method described above. For example, when a small amount of oil leakage from a storage tank is generated over a long period of time, the degree of soil contamination becomes serious by gradually accumulating, while the amount of oil reduction in the storage tank is relatively small, I do not.

On the other hand, if the oil leakage is intensively generated in a certain region of the ground, if the oil leakage sensor is not disposed in the corresponding region, soil contamination and groundwater contamination can not be detected.

As an alternative to solve the above problem, it is possible to measure the change of the gas contained in the soil. When oil or harmful substances causing soil pollution start to leak out from underground facilities, the pattern of underground gas changes, so that leakage of oil or harmful material can be deduced by detecting underground gas.

Various types of gas detectors or gas detectors are disclosed in the prior art. For example, Patent Document 10-2008-0009548 discloses a gas concentration sensor and a method of manufacturing the same.

FIG. 1 shows a schematic configuration of a gas concentration sensor disclosed in the above patent publication. Referring to the drawings, a gas concentration sensor according to the related art is constructed by integrally injecting a body 101 of a sensor and assembling each component therein. The reaction cell part 102 is formed by sealing the upper and lower openings of the cylindrical wall with gas permeable membranes 103 and 104. In the sealed space, a liquid electrolyte 105 for reacting with the measurement gas, 106 and 107 and electrodes 110 and 111, respectively.

Electrodes 110 and 111 extend to leads 108 and 109 and are connected to terminal 115. In order to prevent the electrolyte from leaking from the reaction cell part 102, the gas permeable membranes 103 and 104 and the holes 112 and 113 through which the lead wires pass are used to completely seal the upper and lower openings of the wall and the through holes 112 and 113. The microfibers are guided to the outside through the small holes 112 and 113 formed in the wall of the reaction cell portion and then connected to the terminals 115 provided on the terminal mounting plate 114 by welding or welding or the like do.

The gas concentration sensor shown in FIG. 1 has a problem in that it can not detect a gas that does not react with the liquid electrolyte, although it can sense a specific gas that reacts with the liquid electrolyte 105. In addition, since gas detection is transmitted as an electric signal, it is impossible to directly analyze the state of soil pollution by analyzing the gas itself.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an improved underground soil contamination detecting apparatus.

It is another object of the present invention to provide an apparatus for detecting soil contamination in the ground, which can directly monitor the gas state of the ground by directly collecting the underground gas.

It is another object of the present invention to provide an apparatus for detecting soil contamination in the ground which can prevent contamination of soil and ground water by underground facilities by detecting underground gas.

In order to achieve the above object, according to the present invention,

Porosities buried around underground facilities where leaks are expected;

A tube connected to the porous tube and extending to the ground;

A suction pump installed on the ground to suck the underground gas by applying negative pressure to the porous pipe through the tube; And

And a gas analyzer for analyzing the underground gas provided by the suction pump.

According to an aspect of the present invention, the porous pipe is formed by forming a plurality of fine holes in a cylindrical pipe.

According to another aspect of the present invention, the thickness of the perforated pipe decreases from the longitudinal direction toward the middle, or becomes thinner from one end to the other end.

According to another aspect of the present invention, all or part of the outer surface of the porous tube is surrounded by a gas permeable membrane.

According to another aspect of the present invention, the gas analyzer determines the leakage of the soil contaminant from the underground facility by analyzing the concentration change of the underground gas.

According to another aspect of the present invention, the diameter of the perforated pipe is larger than the diameter of the tube.

The apparatus for detecting soil contamination in the ground according to the present invention is advantageous in that the environmental change of the ground can be constantly or periodically monitored by collecting and analyzing the underground gas installed in the ground. Especially, it is possible to directly detect minute changes of the gas in the soil when the oil or harmful substance that can pollute the soil or the ground water is leaked. In addition, unlike existing gas detection devices, it can raise the ground to the ground, allowing quick and accurate determination of leaks.

Meanwhile, the apparatus for detecting soil contamination in the ground according to the present invention can be applied to all kinds of underground facilities such as storage tanks, gas and liquid delivery pipes, wastewater pipes, and the like, since it can detect the gases present in the soil layer in real time. The present invention has an advantage that the soil contamination state and leakage position can be accurately detected through gas analysis, and it can be realized at a lower cost than the conventional method of monitoring and monitoring the well.

1 is a schematic configuration diagram of a gas concentration sensor according to the prior art.
2 is a schematic overall configuration diagram of an apparatus for detecting soil contamination in the ground according to the present invention.
3 is an explanatory diagram illustrating the configuration of a porous pipe in an underground soil pollution detecting apparatus shown in FIG.
4 is a sectional view showing the cross-sectional structure of the porous tube.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail with reference to an embodiment shown in the accompanying drawings.

2 schematically shows an embodiment of an apparatus for detecting soil contamination in the ground according to the present invention.

Referring to the drawings, the apparatus for detecting soil contamination in the ground according to the present invention includes a pore tube 21 embedded in the vicinity of an underground facility where leakage is expected, a tube T connected to the pore tube 21, (P) for sucking gas from the tube (T), and a gas analyzer (23) for analyzing the gas collected by the suction pump (P).

In the embodiment shown in the drawings, the delivery tube 20 may be, for example, a pipe from a storage tank (not shown) of a gas station or a conduit through which wastewater flows, . The delivery tube 20 may pass through a manhole 28 that is buried underground or closed with a manhole cover 27.

The perforated pipe (21) may be disposed at any place where leakage of the oil or harmful substance is expected in the ground. In the embodiment shown in the figures, the perforated pipe 21 is buried adjacent to the connecting portion 25 of the delivery tube 20 because the leak is frequently generated at the connection of the delivery tube 20 in view of experience .

However, in another example, the perforated pipe 21 may be disposed at any place as well as the connecting portion 25. [ The pores 21 can also be disposed in the manhole 28.

The pores 21 can be connected in series and in parallel through the tube T. The tube T is preferably a urethane tube, for example. It can withstand earth pressure in the case of urethane tube. It is not corroded or damaged by change of underground environment, and it is easy to install and handle.

The pump P is disposed on the ground and provides a negative pressure to each of the pores 21 through the tube T. [ The underground gas sucked in the perforated pipe 21 is collected through the tube T by the negative pressure provided by the pump P. The collected gas is sent to the gas analyzer 23.

The capacity of the pump (P) is determined in consideration of the number of the perforated pipes (21). A plurality of fine holes are formed in the porous tube 21 and one or more porous tubes 21 are connected to the suction pump P in series or in parallel and the porous tube 21 is formed so that the gas is buried in a relatively thin ground The capacity of the pump P needs to be determined so as to provide a proper sound pressure to all of the porous pipes 21.

3 is an exploded perspective view showing a structure of a pore tube provided in the underground gas sensing apparatus shown in FIG.

Referring to the drawings, it is preferable that the porous tube 21 is configured to have a shape of a cylindrical pipe when viewed from the outside.

The perforated pipe 21 can be configured in various ways. In the illustrated embodiment, the porous tube 21 has a plurality of fine holes 21a formed in a pipe made of metal, synthetic resin, ceramics or ceramics. It is possible to form a pipe with urethane and form fine holes 21a. It is preferable that the size of the hole 21a is small enough to allow passage of the fluid but not allow passage of the soil particles having the smallest size. It is preferable to form the hole 21a having a diameter of 0.01 mm to 0.5 mm, for example.

If the pores of the pores 21 are large enough to pass through the soil in a fine particle state, when the pores 21 are installed in the ground, gravels or gravels larger than the pores 21a are formed around the pores 21 So that the inflow of the soil can be prevented. In practice, even if the soil flows into the interior of the porous tube 21, the soil can be removed by the suction pressure of the suction pump P.

 Even if the fine holes are not formed through a separate process, inflow of the underground gas and suppression of inflow of the soil and liquid can be realized by forming the porous tube 21 from a material having air permeability while enduring the earth pressure. For example, it is well known that when a jar is made using loess, it has peculiar breathability, and the pores 21 can be realized in the same manner.

It is preferable that the porous tube 21 is connected to the tube T via the coupling tube 31. One end of the coupling pipe 31 is connected to the end of the relatively large diameter pore 21 and the other end of the coupling pipe 31 is connected to the tube T. The coupling pipe 31 is made of urethane, Lt; / RTI >

As the diameter of the porous tube 21 is larger, the area of contact with the soil is widened, which is advantageous for gas suction. On the other hand, the diameter of the tube T is preferably small so as to maintain the suction pressure. Therefore, it is preferable to connect the tube T having the small diameter and the tube 21 having the large diameter by using the coupling tube 31.

The gas permeable membrane 42 can be covered entirely or partially on the outer surface or the inner surface of the porous tube 21. [ Since the gas permeable membrane 42 passes the gas but does not pass the liquid or the solid, it is possible to prevent the liquid such as rainwater from flowing into the inside of the porous tube 21. [

When the gas permeable membrane 21 is covered, the size of the hole 21a formed in the porous tube 21 is relatively increased, so that the area in which the gas can enter the inside of the porous tube 21 can be extended . The gas permeable membrane (not shown) surrounding the surface of the porous tube 21 is supported by the circumferential surface of the porous tube 21 in which the hole 21a is not formed, so that it can withstand a certain earth pressure.

4 shows a cross-sectional view of the perforated tube shown in Fig.

Referring to the drawings, a plurality of holes 21a are formed in the porous tube 21, and an inner surface of the porous tube 21 is formed as an inclined surface 41 which tapers toward the middle in the longitudinal direction. That is, the inclined surface 41 forms two abutting conical shapes in the interior of the pore tube 21. [

The inclined surface 41 formed on the inner surface of the porous tube 21 accumulates the liquid flowing into the interior of the porous tube 21 as an intermediate portion so as to be easily discharged to the outside. That is, even if a liquid such as rainwater enters through the hole 21a of the porous tube 21, the liquid tends to aggregate along the inclined surface 41 due to gravity, It is easy to be discharged to the outside. For this purpose, it is preferable to form the hole in the intermediate portion of the porous tube 21 relatively larger than the hole in the other portion.

In another example not shown in the drawings, the inclined surface 41 is formed so that one truncated cone is formed inside the perforated pipe 21. [ That is, the thickness of one end of the porous tube 21 is made thick and the inside of the porous tube 21 is tapered so that the thickness becomes thinner toward the other end of the porous tube 21.

Changes in the underground environment can be monitored at any time or periodically by means of an underground soil pollution detection device as described above. The underground gas is supplied to the gas analyzer 23 through the porous pipe 21 by the operation of the pump P and the gas analyzer 23 analyzes the change of the underground gas to detect the leakage of the oil or the harmful substance can do.

For example, leaking oil, such as gasoline, will increase the amount of volatilized vapor in the soil and leakage of sewage due to rupture of the sewer pipe will increase the amount of methane in the soil. The gas analyzer 23 can determine the leakage by analyzing the concentration change of the specific gas component.

20. Shipping
23. Gas analyzer 25. Connection
P. Pumps T. Tubes

Claims (6)

Porosities buried around underground facilities where leaks are expected;
A tube connected to the porous tube and extending to the ground;
A suction pump installed on the ground to suck the underground gas by applying negative pressure to the porous pipe through the tube; And
A gas analyzer for analyzing the underground gas provided by the suction pump;
, ≪ / RTI &
And the thickness of the porous pipe decreases from the longitudinal direction toward the middle. The method according to claim 1,
Wherein the porous pipe is formed by forming a plurality of fine holes in a cylindrical pipe. delete The method according to claim 1,
Wherein the gas permeable membrane covers all or part of the outer surface of the porous pipe. The method according to claim 1,
Wherein the gas analyzer determines the leakage of the soil pollutants from the underground facility by analyzing the concentration change of the underground gas. The method according to claim 1,
Wherein the diameter of the porous pipe is larger than the diameter of the tube.
KR1020150191112A 2015-12-31 2015-12-31 Apparatus For Detecting Soil Pollution In Subsurface KR101615364B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101802734B1 (en) * 2017-04-03 2017-11-30 (주)동명엔터프라이즈 Soil and Groundwater Pollutant Detection System and Method for Detecting Pollutants Using the Detection System
KR20190097891A (en) * 2018-02-13 2019-08-21 (주)동명엔터프라이즈 Oil leakage detection apparatus for detecting soil ground water contaminating

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101802734B1 (en) * 2017-04-03 2017-11-30 (주)동명엔터프라이즈 Soil and Groundwater Pollutant Detection System and Method for Detecting Pollutants Using the Detection System
KR20190097891A (en) * 2018-02-13 2019-08-21 (주)동명엔터프라이즈 Oil leakage detection apparatus for detecting soil ground water contaminating
KR102118587B1 (en) 2018-02-13 2020-06-04 (주)동명엔터프라이즈 Oil leakage detection apparatus for detecting soil ground water contaminating

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