WO2022162011A1 - Hot soil sampling system - Google Patents
Hot soil sampling system Download PDFInfo
- Publication number
- WO2022162011A1 WO2022162011A1 PCT/EP2022/051773 EP2022051773W WO2022162011A1 WO 2022162011 A1 WO2022162011 A1 WO 2022162011A1 EP 2022051773 W EP2022051773 W EP 2022051773W WO 2022162011 A1 WO2022162011 A1 WO 2022162011A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- soil
- outer cylinder
- sample
- cylinder
- sampling system
- Prior art date
Links
- 238000005527 soil sampling Methods 0.000 title claims abstract description 21
- 239000002689 soil Substances 0.000 claims abstract description 65
- 238000005070 sampling Methods 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 17
- 239000000356 contaminant Substances 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 8
- 238000011065 in-situ storage Methods 0.000 description 6
- 238000003795 desorption Methods 0.000 description 5
- 238000000605 extraction Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000005202 decontamination Methods 0.000 description 3
- 230000003588 decontaminative effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000005180 public health Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 239000002680 soil gas Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 238000004017 vitrification Methods 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
- E02D1/04—Sampling of soil
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B11/00—Other drilling tools
- E21B11/005—Hand operated drilling tools
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B27/00—Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, baskets or buckets for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
Definitions
- the present invention relates to a system for sampling and monitoring in a process for the thermal remediation of contaminated soils.
- the invention relates to a method and devices for extracting a hot soil sample during or at the end of the treatment in order to subsequently analyse the chemical composition of this sample.
- a process frequently used to remove contaminants from subsurface soil is in situ thermal desorption, which is used to increase the efficiency of a soil vapour extraction process.
- In-situ thermal desorption involves heating the soil without excavation to raise the temperature of the soil while simultaneously removing soil gas.
- the heat added to the contaminated soil can raise the soil temperature above the vaporisation temperatures of the contaminants in the soil and cause the contaminants to vaporise.
- a vacuum applied to the soil removes the vaporised contaminant from the soil.
- Another method of heating a soil containing contaminants comprises injecting a heated fluid into the soil.
- Such a process is for example described in US Patent No. 6,000,882.
- the process described here consists of introducing a system of perforated pipes into the soil. A flow of hot air is sent through the pipes. The hot air is injected into the soil through perforations in the pipes at the pipe perforations.
- a contaminant vapour is formed in the soil, which can be removed from the soil through the pipe perforations and discharged to an
- Another way of heating a floor is to heat a floor by thermal conduction using electrical resistors or to heat the floor by injecting electrical current into the floor and dissipating it by Joule effect.
- the main difficulties associated with hot sampling are related to the texture and structure of the soil, which loses its cohesion due to drying, and to ensuring that changes in physical and chemical conditions do not influence the quality of the recovered sample, particularly due to the volatilisation of the most volatile elements during sampling.
- the present invention therefore aims to provide a solution to be implemented to extract several samples from this processing volume in order to be able to know the composition of the soil after a certain processing time and in this way define the progress of the processing.
- a hot sampling device as invented is that it can address all types of soils, heated at high temperature, while avoiding that the sample is exposed to different pressures and temperature while collected, and also guaranteeing the exact depth and location of the sample taken.
- CN 107462439 and JP402120524 are known as prior art and present systems for the extraction of samples in soils, consisting of two coaxial tubes.
- FIG. 1 Heat sampler - internal and external exploded view
- the present invention relates to a hot soil sampling system for extracting samples representative of the subsoil condition at different depths. It allows the extraction of hot soils that have lost their cohesion due to heating. Thus, during thermal decontamination, which consists of heating the soil, often above 100°C, control samples can be taken as the decontamination progresses, in order to give a representative view of the actual state of the decontamination.
- the hot sampling system is a system for extracting a representative sample of hot soil during or after heat treatment.
- the system consists of a hot sampler (1), an auger or equivalent system for drilling to the required depth for sampling and a set of rods for extending the borehole to the required depth and for handling the hot sampler.
- the hot sampler (1) consists of two coaxial cylinders ( land2 ), each of which has an opening window (5 and 8) of comparable size at the top of the cylinder and of a height corresponding to the required depth window for sampling; the inner cylinder (2) is connected to the operator through the rod (10) which allows the operator to rotate the inner cylinder when it is positioned at the correct depth. The rod also allows the operator to establish the correct sampling depth.
- the system consists of inserting a hot sampler (1) into the soil at the chosen depth for representative sampling.
- the rod (10) is rotated until the inner (8) and outer (5) windows are facing each other.
- the sampling element inserted at the determined depth consists of two cylindrical elements sliding in each other around a radial axis.
- the said sampling technique is made possible by placing reservation tubes (RT) of diameter between 30 and 70mm, preferably between 40 and 60mm at the same time as the placement of the heating elements of the in situ thermal desorption treatment, in the treatment area.
- RT reservation tubes
- the position and length of these tubes depends on the location of points equidistant from the heating elements.
- said sampling technique comprises the following steps:
- the two tubes (1)(2) are pushed together into the soil or material to be sampled through the reservation tubes (TR) by arm force or with a sledgehammer. They are expandable by screwing one length of 0.7 to 2m, preferably 0.9 to 1.2m, onto the other to achieve the desired depth.
- this device Depending on the type of soil, the introduction of this device into the soil can be complicated, it is necessary to first introduce a tube with a screw thread into the soil or the material to be sampled.
- crank (3) must be turned half a turn to open the window (8) and sample the soil in the inner tube window (5 and 8).
- both tubes are rotated about 5 turns.
- the window should be closed by turning the inner tube half a turn (8).
- the inner tube (2) is extracted with a digger or pulling device or by arm power.
- the 1 m lengths are unscrewed gradually one by one to obtain the soil sample.
- the soil is immediately collected in a suitable container.
- the outer window (5) is provided with a scraper (6) to force the soil to be sampled into the sampler (1) when it has been heated significantly and has become too hard to flow naturally into the sampler.
- the collected soil sample is then sent to an accredited laboratory to analyse the targeted pollutants.
- the said sampling technique consists of introducing the tube (1) into the ground through the TR tubes with a hammer. Again, in some cases the use of a tube with a screw thread is required before the sampling tube (1 and 9) is inserted.
- the rod connected to the sampler (10) is provided with depth indications corresponding to the exact depth of the sample.
- the rod consists of 2 coaxial rods. The outer one is connected to the sampler (1) and the inner one to the inner sliding element (9).
- the hot sampler is placed on a conical tip (4), which may or may not be attached to the sampler;
- one or more windows of different sizes depending on the type of material to be sampled (variable inner window - large and fixed outer window).
- the crank handle (3) comprises an insulation layer of at least 1 cm, preferably 2 cm.
- the handles comprise an insulation layer of at least 1 cm, preferably 2 cm.
- the insulation layer is resistant to temperatures up to at least 600°C.
- the inner and outer cylinders are made of heat resistant metal, suitable to withstand temperatures up to 600°C.
- the soil sampling system is made of heat resistant materials, suitable to withstand temperatures up to 600°C.
- the soil sampling system does not comprise any materials not resistant to temperatures up to 600°C, by preference, the soil sampling system does not comprise any plastic parts.
- the temperature at which polymers deform is in general low. Under a pressure of 0.46 MPa, polypropylene (PP) and polyethylene (PE) deform at, respectively, 100 and 85°C. Even when comprising 30% glass fibres, PE and PP are not suitable to be used in a hot soil sampling system because it is not stable at temperatures higher than 250°C.
- the outer cylinder is provided with spiral or fractional spiral shaped fins to improve the introduction of the tool into the soil.
- the fins are defined as an additional part to the tube, which may be in the form of a spiral or a fraction of a spiral, composed, in a preferred embodiment, of the same material as the outer cylinder, which is intended to improve the introduction of the tool into the soil.
- the outer shaft is provided with metric indications to determine the exact location of the sample.
- the outer cylinder is provided with metric indications, suitable to determine the exact location of the sampler.
- the inner and outer cylinders are threaded.
- the outer cylinder is provided with fins in the form of a full or partial spiral and allowing better penetration into the ground.
- the inner and outer cylinders allow a sampling window to be opened and closed.
- the soil samples inside the soil sampling system are stored airtight when the window is closed.
- temperatures higher than 500°C are applied.
- Soil sampling systems according to the prior art are not able to prevent loss of volatile organic compounds after sampling. This reduces the accuracy of the soil sampling and the analysis. Being able to follow-up the concentration of the contaminants at different depths, allows a good prediction of the required remaining treatment time.
- the invention relates to a soil sampling system for extracting a hot soil sample, comprising at least one cylindrical element inserted in another cylindrical element of larger diameter allowing rotation of the inner element in the outer element, and wherein the inner element comprises at least one opening allowing entry of the solid to be sampled when positioned such that the openings in the inner and outer cylinder are aligned and allow the solid to be sampled to flow into the inner cylinder and such that the outer cylinder is provided with a scraper to force the entry of soils into the sampler upon rotation thereof.
- the invention relates to a soil sampling system for extracting a hot soil sample up to 600°C, comprising (a) at least one inner cylinder comprising a sampler and (b) an outer cylinder of larger diameter allowing rotation of the inner cylinder in the outer cylinder, and wherein the inner cylinder and the outer cylinder comprise at least one opening suitable for entry of the hot soil sample when positioned such that the openings in the inner and outer cylinder are aligned and allow the sample to flow into the inner cylinder and such that the outer cylinder can rotate to seal the inner cylinder containing the sample airtight from the outside, and where the outer cylinder is provided with a scraper to force the entry of soil into the sampler upon rotation thereof and where the outer cylinder is provided with spiral or fractional spiral shaped fins to improve the introduction of the soil sampling system into the soil.
- the window is capable to prevent air from entering if the pressure inside remains higher than 0.5 atm., and preferably 0.2 atm. In an embodiment, the window is capable to prevent loss of volatiles if the pressure inside remains lower than 2.0 atm. and preferably 4 atm.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Soil Sciences (AREA)
- Mechanical Engineering (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention relates to a soil sampling system for extracting a hot soil sample up to 600°C, comprising (a) at least one inner cylinder comprising a sampler and (b) an outer cylinder of larger diameter allowing rotation of the inner cylinder in the outer cylinder, and wherein the inner cylinder and the outer cylinder comprise at least one opening suitable for entry of the hot soil sample when positioned such that the openings in the inner and outer cylinder are aligned and allow the sample to flow into the inner cylinder and such that the outer cylinder can rotate to seal the inner cylinder containing the sample airtight from the outside, and where the outer cylinder is provided with a scraper to force the entry of soil into the sampler upon rotation thereof and where the outer cylinder is provided with spiral or fractional spiral shaped fins to improve the introduction of the soil sampling system into the soil.
Description
HOT SOIL SAMPLING SYSTEM
DESCRIPTION
FIELD OF THE INVENTION
The present invention relates to a system for sampling and monitoring in a process for the thermal remediation of contaminated soils. In particular, the invention relates to a method and devices for extracting a hot soil sample during or at the end of the treatment in order to subsequently analyse the chemical composition of this sample.
CONTEXT OF THE INVENTION
Soil contamination has become a major concern in many places. Soil can become contaminated with chemical, biological and/or radioactive contaminants. Material spills, leaking storage tanks and seepage from material dumps are just a few examples of the many ways that soil can become contaminated. If left in place, many of these contaminants will find their way into aquifers, the air or the food supply and could pose risks to public health.
There are many proposed methods for removing surface contaminants, such as excavation followed by incineration, in-situ vitrification, biological treatment, chemical additives for deactivation, radio frequency heating, etc. Although these methods work in some applications, they can be very expensive and are not practical if many tonnes of soil have to be treated. Although working in some applications, these methods can be very expensive and are not practical if many tonnes of soil need to be treated.
A process frequently used to remove contaminants from subsurface soil is in situ thermal desorption, which is used to increase the efficiency of a soil vapour extraction process. In-situ thermal desorption involves heating the soil without excavation to raise the temperature of the soil while simultaneously removing soil gas. The heat added to the contaminated soil can raise the soil temperature above the vaporisation temperatures of the contaminants in the soil and cause the contaminants to vaporise. A vacuum applied to the soil removes the vaporised contaminant from the soil.
Another method of heating a soil containing contaminants comprises injecting a heated fluid into the soil. Such a process is for example described in US Patent No. 6,000,882. The process described here consists of introducing a system of perforated pipes into the soil. A flow of hot air is sent through the pipes. The hot air is injected into the soil through perforations in the pipes at the pipe perforations. A contaminant vapour is formed in the soil, which can be removed from the soil through the pipe perforations and discharged to an off-gas treatment unit.
Another way of heating a floor is to heat a floor by thermal conduction using electrical resistors or to heat the floor by injecting electrical current into the floor and dissipating it by Joule effect.
Thermal conductive heating of contaminated soil in combination with removal of contaminating gases from the soil by means of a vapour extraction system is old in the art.
During in-situ thermal desorption, all surfaces in contact with the atmosphere are usually covered with concrete and an insulation layer after the concrete layer.
There are therefore many soil treatment systems that involve, in one way or another, heating the soil to mobilise the contaminants and then extracting them.
All these systems face a common difficulty in measuring the progress of clearance on the one hand and in checking that it is complete on the other. Indeed, conventional sampling techniques are not designed to sample hot soils, in particular soils with temperatures above 100°C.
The main difficulties associated with hot sampling are related to the texture and structure of the soil, which loses its cohesion due to drying, and to ensuring that changes in physical and chemical conditions do not influence the quality of the recovered sample, particularly due to the volatilisation of the most volatile elements during sampling.
At the same time, it is important, when sampling said soil which not only is very hot but has lost all structure, to make sure that the sampling method itself does not affect the sample by for example releasing volatile components as it is exposed to colder atmosphere and different pressures when extracted;
Additionally, it is also essential to make sure that the exact depth/location of the sample is known and secured.
However, knowledge of the composition of the soil being processed is an asset that will allow the performance of the process to be evaluated and its operation to be improved. Conventional sampling techniques (augers, gouges, liners, etc.) are
ineffective in such a process because the treated material literally "flows" through them. In addition, the high temperature (>>120°C) prevents the use of formed plastics such as check valves, advancing casing parts, etc.
The present invention therefore aims to provide a solution to be implemented to extract several samples from this processing volume in order to be able to know the composition of the soil after a certain processing time and in this way define the progress of the processing.
It also allows a hot sample of equivalent quality to a cold sample to be taken, enabling the objectives of thermal depollution to be validated.
The particulars of a hot sampling device as invented is that it can address all types of soils, heated at high temperature, while avoiding that the sample is exposed to different pressures and temperature while collected, and also guaranteeing the exact depth and location of the sample taken.
CN 107462439 and JP402120524 are known as prior art and present systems for the extraction of samples in soils, consisting of two coaxial tubes.
BRIEF DESCRIPTION OF THE DRAWINGS
The attached drawings illustrate the invention:
Figure 1 : Heat sampler - internal and external exploded view
Figure 2: Sampler - external appearance
Figure 3: Detail of the internal and external sampler
Figure 4: Sampling sequence with lost tip
Figure 5: External and internal sampler exploded
Figure 6: Perspective view lost point sampling
The legend of the figures is as follows:
1. Heat sampler: external tube
2. Internal coaxial cylinder
3. Crank handle
4. Tapered tip (lost or not)
5. External opening window
6. Scraper
7. Internal sampler cap
8. Internal opening window
9. Internal sampler
10. Internal sampler rod
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a hot soil sampling system for extracting samples representative of the subsoil condition at different depths. It allows the extraction of hot soils that have lost their cohesion due to heating. Thus, during thermal decontamination, which consists of heating the soil, often above 100°C, control samples can be taken as the decontamination progresses, in order to give a representative view of the actual state of the decontamination.
It consists of two coaxial cylinders that slide into each other and allow a sampling window to be opened and closed at a defined depth, thus ensuring a representative sample in warm soil.
The hot sampling system is a system for extracting a representative sample of hot soil during or after heat treatment.
The system consists of a hot sampler (1), an auger or equivalent system for drilling to the required depth for sampling and a set of rods for extending the borehole to the required depth and for handling the hot sampler.
The hot sampler (1) consists of two coaxial cylinders ( land2 ), each of which has an opening window (5 and 8) of comparable size at the top of the cylinder and of a height corresponding to the required depth window for sampling; the inner cylinder (2) is connected to the operator through the rod (10) which allows the operator to rotate the inner cylinder when it is positioned at the correct depth. The rod also allows the operator to establish the correct sampling depth.
The system consists of inserting a hot sampler (1) into the soil at the chosen depth for representative sampling. When the hot sampler (1) is placed at the correct depth, the rod (10) is rotated until the inner (8) and outer (5) windows are facing each other.
The sampling element inserted at the determined depth consists of two cylindrical elements sliding in each other around a radial axis.
In a preferred embodiment, the said sampling technique is made possible by placing reservation tubes (RT) of diameter between 30 and 70mm, preferably between 40 and 60mm at the same time as the placement of the heating elements of the in situ thermal desorption treatment, in the treatment area. The position and length of these tubes depends on the location of points equidistant from the heating elements.
In a preferred embodiment, said sampling technique comprises the following steps:
1. The two tubes (1)(2) are pushed together into the soil or material to be sampled through the reservation tubes (TR) by arm force or with a sledgehammer. They are expandable by screwing one length of 0.7 to 2m, preferably 0.9 to 1.2m, onto the other to achieve the desired depth.
Depending on the type of soil, the introduction of this device into the soil can be complicated, it is necessary to first introduce a tube with a screw thread into the soil or the material to be sampled.
2. Once the sampling depth has been reached, the crank (3) must be turned half a turn to open the window (8) and sample the soil in the inner tube window (5 and 8).
3. To complete the filling of the window, both tubes are rotated about 5 turns.
4. Once filled, the window should be closed by turning the inner tube half a turn (8).
5. The inner tube (2) is extracted with a digger or pulling device or by arm power. The 1 m lengths are unscrewed gradually one by one to obtain the soil sample. The soil is immediately collected in a suitable container.
In another preferred embodiment, the outer window (5) is provided with a scraper (6) to force the soil to be sampled into the sampler (1) when it has been heated significantly and has become too hard to flow naturally into the sampler.
The collected soil sample is then sent to an accredited laboratory to analyse the targeted pollutants.
In another preferred embodiment, the said sampling technique consists of introducing the tube (1) into the ground through the TR tubes with a hammer. Again, in some cases the use of a tube with a screw thread is required before the sampling tube (1 and 9) is inserted.
In a preferred embodiment, the rod connected to the sampler (10) is provided with depth indications corresponding to the exact depth of the sample.
In a preferred embodiment, the rod consists of 2 coaxial rods. The outer one is connected to the sampler (1) and the inner one to the inner sliding element (9).
In a preferred embodiment, the hot sampler is placed on a conical tip (4), which may or may not be attached to the sampler;
In a preferred embodiment, one or more windows of different sizes depending on the type of material to be sampled (variable inner window - large and fixed outer window).
In an embodiment, the crank handle (3) comprises an insulation layer of at least 1 cm, preferably 2 cm. To protect the hands of the operator, the handles comprise an insulation layer of at least 1 cm, preferably 2 cm. The insulation layer is resistant to temperatures up to at least 600°C.
In a preferred embodiment, the inner and outer cylinders are made of heat resistant metal, suitable to withstand temperatures up to 600°C. In an embodiment, the soil sampling system is made of heat resistant materials, suitable to withstand temperatures up to 600°C.
In an embodiment, the soil sampling system does not comprise any materials not resistant to temperatures up to 600°C, by preference, the soil sampling system does not comprise any plastic parts. The temperature at which polymers deform is in general low. Under a pressure of 0.46 MPa, polypropylene (PP) and polyethylene (PE) deform at, respectively, 100 and 85°C. Even when comprising 30% glass fibres, PE and PP are not suitable to be used in a hot soil sampling system because it is not stable at temperatures higher than 250°C.
In a preferred embodiment, the outer cylinder is provided with spiral or fractional spiral shaped fins to improve the introduction of the tool into the soil. The fins are defined as an additional part to the tube, which may be in the form of a spiral or a fraction of a spiral, composed, in a preferred embodiment, of the same material as the outer cylinder, which is intended to improve the introduction of the tool into the soil.
In a preferred embodiment, the outer shaft is provided with metric indications to determine the exact location of the sample. In a preferred embodiment, the outer
cylinder is provided with metric indications, suitable to determine the exact location of the sampler.
In a preferred embodiment, the inner and outer cylinders are threaded.
In another preferred embodiment, the outer cylinder is provided with fins in the form of a full or partial spiral and allowing better penetration into the ground.
In an embodiment, the inner and outer cylinders allow a sampling window to be opened and closed.
In an embodiment, the soil samples inside the soil sampling system are stored airtight when the window is closed. During treatment to remove contaminants using in situ thermal desorption, temperatures higher than 500°C are applied. Soil sampling systems according to the prior art are not able to prevent loss of volatile organic compounds after sampling. This reduces the accuracy of the soil sampling and the analysis. Being able to follow-up the concentration of the contaminants at different depths, allows a good prediction of the required remaining treatment time.
The invention relates to a soil sampling system for extracting a hot soil sample, comprising at least one cylindrical element inserted in another cylindrical element of larger diameter allowing rotation of the inner element in the outer element, and wherein the inner element comprises at least one opening allowing entry of the solid to be sampled when positioned such that the openings in the inner and outer cylinder are aligned and allow the solid to be sampled to flow into the inner cylinder and such that the outer cylinder is provided with a scraper to force the entry of soils into the sampler upon rotation thereof.
The invention relates to a soil sampling system for extracting a hot soil sample up to 600°C, comprising (a) at least one inner cylinder comprising a sampler and (b) an outer cylinder of larger diameter allowing rotation of the inner cylinder in the outer cylinder, and wherein the inner cylinder and the outer cylinder comprise at least one opening suitable for entry of the hot soil sample when positioned such that the openings in the inner and outer cylinder are aligned and allow the sample to flow into the inner cylinder and such that the outer cylinder can rotate to seal the inner cylinder containing the sample airtight from the outside, and where the outer cylinder is provided with a scraper to force the entry of soil into the sampler upon
rotation thereof and where the outer cylinder is provided with spiral or fractional spiral shaped fins to improve the introduction of the soil sampling system into the soil. In order to seal two sides from each other airtight, it means that no air can escape or pass through when the pressure on both sides is 1 atm. In an embodiment, the window is capable to prevent air from entering if the pressure inside remains higher than 0.5 atm., and preferably 0.2 atm. In an embodiment, the window is capable to prevent loss of volatiles if the pressure inside remains lower than 2.0 atm. and preferably 4 atm.
Claims
1. A soil sampling system for extracting a hot soil sample up to 600°C, comprising (a) at least one inner cylinder comprising a sampler and (b) an outer cylinder of larger diameter allowing rotation of the inner cylinder in the outer cylinder, and wherein the inner cylinder and the outer cylinder comprise at least one opening suitable for entry of the hot soil sample when positioned such that the openings in the inner and outer cylinder are aligned and allow the sample to flow into the inner cylinder and such that the outer cylinder can rotate to seal the inner cylinder containing the sample airtight from the outside, and where the outer cylinder is provided with a scraper to force the entry of soil into the sampler upon rotation thereof and where the outer cylinder is provided with spiral or fractional spiral shaped fins to improve the introduction of the soil sampling system into the soil.
2. Soil sampling system according to claim 1, wherein the inner and outer cylinders are made of heat resistant metal, suitable to withstand temperatures up to 600°C.
3. Soil sampling system according to claim 1 or 2, wherein the outer cylinder is provided with metric indications, suitable to determine the exact location of the sampler.
4. Soil sampling system according to any of the previous claims 1-3, wherein the inner and outer cylinders are threaded.
5. Soil sampling system according to any of the previous claims 1-4, wherein the inner and outer cylinders allow a sampling window to be opened and closed.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE20210009A BE1029046B1 (en) | 2021-01-27 | 2021-01-27 | Hot sampling system |
BEBE2021/0009 | 2021-01-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022162011A1 true WO2022162011A1 (en) | 2022-08-04 |
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PCT/EP2022/051773 WO2022162011A1 (en) | 2021-01-27 | 2022-01-26 | Hot soil sampling system |
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BE (1) | BE1029046B1 (en) |
WO (1) | WO2022162011A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN115508134A (en) * | 2022-10-17 | 2022-12-23 | 西藏积晟环保科技有限公司 | Sampler for soil treatment |
CN115931436A (en) * | 2023-02-09 | 2023-04-07 | 安徽农业大学 | Soil sampling ware is administered to soil |
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JPH02120524A (en) | 1988-10-31 | 1990-05-08 | Tochigi Fuji Ind Co Ltd | Housing |
US6000882A (en) | 1997-12-03 | 1999-12-14 | United Soil Recycling | Methods and systems for remediating contaminated soil |
JP2011052466A (en) * | 2009-09-02 | 2011-03-17 | Kajima Corp | Sampling device |
CN205808756U (en) * | 2016-07-01 | 2016-12-14 | 北京润丰园林绿化工程有限公司 | Plant root soil humidity prospecting apparatus |
CN107462439A (en) | 2017-08-09 | 2017-12-12 | 重庆辰央农业科技有限公司 | Suitable for the two-tube sampler of large volume agricultural product |
CN210638929U (en) * | 2019-09-10 | 2020-05-29 | 北京岩土工程勘察院有限公司 | Portable soil sampler |
Family Cites Families (1)
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JPH02120524U (en) * | 1989-03-15 | 1990-09-28 |
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2022
- 2022-01-26 WO PCT/EP2022/051773 patent/WO2022162011A1/en active Application Filing
Patent Citations (6)
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JPH02120524A (en) | 1988-10-31 | 1990-05-08 | Tochigi Fuji Ind Co Ltd | Housing |
US6000882A (en) | 1997-12-03 | 1999-12-14 | United Soil Recycling | Methods and systems for remediating contaminated soil |
JP2011052466A (en) * | 2009-09-02 | 2011-03-17 | Kajima Corp | Sampling device |
CN205808756U (en) * | 2016-07-01 | 2016-12-14 | 北京润丰园林绿化工程有限公司 | Plant root soil humidity prospecting apparatus |
CN107462439A (en) | 2017-08-09 | 2017-12-12 | 重庆辰央农业科技有限公司 | Suitable for the two-tube sampler of large volume agricultural product |
CN210638929U (en) * | 2019-09-10 | 2020-05-29 | 北京岩土工程勘察院有限公司 | Portable soil sampler |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115508134A (en) * | 2022-10-17 | 2022-12-23 | 西藏积晟环保科技有限公司 | Sampler for soil treatment |
CN115931436A (en) * | 2023-02-09 | 2023-04-07 | 安徽农业大学 | Soil sampling ware is administered to soil |
CN115931436B (en) * | 2023-02-09 | 2023-05-30 | 安徽农业大学 | Soil sampler for soil treatment |
Also Published As
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BE1029046A1 (en) | 2022-08-19 |
BE1029046B1 (en) | 2022-08-23 |
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