An integrated device for in-situ heating, extraction, and monitoring of soil under obstacles

Abstract

This invention discloses an integrated in-situ heating, extraction, and monitoring device for soil under obstacles, belonging to the field of soil remediation technology. It comprises a double-layer structure from the inside out: an extraction device layer and a heating device layer. The extraction device layer, from the outside in, consists of an outer wall, a support plate, and a monitoring device. The heating device layer, from the outside in, consists of an outer wall and a heating device. This invention features flexibility, allowing the heating and extraction areas to effectively cover the contaminated site, ensuring effective soil remediation. Furthermore, this invention integrates the heating device, extraction device, and soil monitoring device, enabling a single installation of all three components, significantly reducing the number of installations and lowering construction costs.

Description

Technical Field

[0001] This invention belongs to the field of soil remediation technology, and in particular relates to an integrated device for in-situ heating, extraction and monitoring of soil under obstacles. Background Technology

[0002] With increasing environmental awareness, soil pollution has become a major concern. Especially in industrialized areas and during urbanization, the accumulation of pollutants in the soil can reach levels that threaten ecosystems and human health. Therefore, effective monitoring and remediation of soil pollution has become a crucial task in the field of environmental protection.

[0003] Heat transfer technology is one of the most commonly used techniques for in-situ remediation of contaminated soil, especially soil containing volatile and semi-volatile pollutants. Its basic principle is to use heating to volatilize the pollutants in the soil, thereby achieving soil remediation. To heat the soil, the heat transfer system must use a heating device.

[0004] Currently, there are two main types of heating devices for heat conduction systems:

[0005] One type is the resistance heating rod, such as CN109702004A and CN111215440A. This heating device has two main structures: the heating rod shell and the internal resistance wire heating section. The shell structure must be rigid, sealed, and possess the mechanical properties required at high temperatures to prevent deformation under soil pressure, which could cause the deformed shell to compress the internal resistance wire heating section and damage the heating rod.

[0006] Secondly, there are gas-heated well types, such as CN115365285A and CN116460124A. These heating devices have two main structures: a heating rod shell and a high-temperature medium supply device, such as a gas burner or high-temperature flue gas supply facility. The shell structure must be rigid, sealed, and possess the mechanical properties required for high temperatures. This is to prevent the loss of the high-temperature pressure medium inside the shell and to prevent deformation of the shell due to soil pressure, which could lead to blockage of the medium channels, leakage of the high-temperature medium, or explosion of the heating device.

[0007] The working principle of the two heating devices described above dictates that the casing material must be metal, and the structural shape must be linear, without any bending. Therefore, these two heating devices are unsuitable for contaminated areas under obstacles or in designs that require the heating rod to be bent, as they create blind spots in the repair area and affect the repair effect.

[0008] Similarly, current in-situ heat conduction extraction wells and soil gas monitoring wells, such as CN107626730A, CN112916598A, CN114778802A, and CN112523678A, are all made of rigid well pipes. In sites with obstacles, there are dead zones in the soil gas extraction and soil gas monitoring areas, which affects the remediation and monitoring results.

[0009] Therefore, there is a need to provide an integrated device for in-situ heating, extraction, and monitoring of soil under obstacles. Summary of the Invention

[0010] This invention provides an integrated device for in-situ heating, extraction, and monitoring of soil under obstacles, in order to solve the problems in the prior art.

[0011] The present invention adopts the following technical solution: an integrated device for in-situ heating, extraction and monitoring of soil under obstacles, comprising a double-layer structure from the inside out, namely an extraction device layer and a heating device layer;

[0012] The extraction device layer consists of, from the outside to the inside, the outer wall of the device, the support plate, and the monitoring device;

[0013] The heating device layer consists of the outer wall of the heating device and the heating device itself, from the outside to the inside.

[0014] In a further technical solution, the outer side of the outer wall of the device is a smooth structure, and the inner side of the outer wall of the device is a corrugated groove structure; the outer wall of the device has slits or holes.

[0015] A further technical solution is that a fine mesh is installed on the inner side of the outer wall of the device.

[0016] In a further technical solution, the support plate is located inside the extraction device layer, the support plate is connected to the inner side wall of the outer wall of the device, and the support plate is connected to the outer side of the outer wall of the heating device.

[0017] In a further technical solution, the support plate is a circular ring structure, and the support plate is provided with a heating device mounting hole located at the center of the support plate. The support plate is also provided with a monitoring device mounting hole, which is an internally threaded structure, and a ventilation and weight reduction hole.

[0018] In a further technical solution, the number of the monitoring device mounting holes and the ventilation weight reduction holes are both four, and the four monitoring device mounting holes and ventilation weight reduction holes are symmetrically distributed, with intervals between them.

[0019] In a further technical solution, the monitoring device includes a probe located at the foremost end, a stud connected to the rear end of the probe, the stud having external threads, a limiting plate connected to the rear end of the stud, the limiting plate having a diameter larger than the stud, a signal line connected to the rear end of the limiting plate, and a protective cover connected to the outer wall of the stud.

[0020] In a further technical solution, the upper section of the protective cover is a breathable structure, and the lower section of the protective cover is provided with a lower section internal thread. The breathable structure is a mesh, a slit, or a drilled hole.

[0021] In a further technical solution, the outer side of the outer wall of the heating device is corrugated and grooved, the outer wall of the heating device provides a fixing point for the installation of the support plate, the inner side of the outer wall of the heating device is smooth, and the inner wall of the heating device is fitted and connected to the heating device.

[0022] In a further technical solution, the heating device is a heating resistor.

[0023] The above-described at least one technical solution adopted in the embodiments of the present invention can achieve the following beneficial effects:

[0024] This invention features flexibility and eliminates blind spots in the repair process, enabling the heating and extraction areas to effectively cover contaminated sites and ensure soil remediation effectiveness. Furthermore, this invention integrates the heating device, extraction device, and soil monitoring device, allowing for a single installation of all three components, significantly reducing the number of installations and lowering construction costs. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 for Figure 1 Sectional view along line AA;

[0028] Figure 3 This is a schematic diagram showing the dimensions of the slit structure on the outer wall of the device in this invention;

[0029] Figure 4 This is a schematic diagram showing the structural dimensions of the outer wall of the device in this invention;

[0030] Figure 5 This is a schematic diagram showing the structural dimensions of the outer wall of the heating device in this invention;

[0031] Figure 6 This is a schematic diagram of the support plate structure dimensions in this invention;

[0032] Figure 7 for Figure 6 Sectional view along line BB;

[0033] Figure 8 This is a schematic diagram of the monitoring device structure in this invention;

[0034] Figure 9 for Figure 8 Sectional view along line CC;

[0035] Figure 10 This is a right view of the protective cover in this invention;

[0036] Figure 11 This is a schematic diagram of the structural dimensions of the monitoring device in this invention;

[0037] Figure 12 This is an example diagram illustrating its application in this invention;

[0038] Figure Labels

[0039] Extraction device layer 1, device outer wall 11, smooth structure 111, corrugated groove structure 112, support plate 12, heating device mounting hole 121, monitoring device mounting hole 122, ventilation and weight reduction hole 123, probe 14, stud 15, external thread 15, limit plate 16, signal line 17, protective cover 18, lower section internal thread 19, monitoring device 13, heating device layer 2, heating device outer wall 21, corrugated groove structure 211, smooth structure 212, heating device 22. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0041] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] Reference Figures 1 to 12 As shown, this embodiment of the invention provides an integrated device for in-situ heating, extraction and monitoring of soil under obstacles, comprising a double-layer structure from the inside out, namely an extraction device layer 1 and a heating device layer 2.

[0043] The extraction device layer 1 consists of, from the outside to the inside, the outer wall of the device 11, the support plate 12, and the monitoring device 13;

[0044] The heating device layer 2, from the outside to the inside, consists of an outer wall 21 and a heating device 22, respectively. (Refer to...) Figure 1 and Figure 2 As shown.

[0045] The specific structure of the outer wall 11 of the device is referred to Figure 4 As shown:

[0046] In this embodiment, the outer side of the outer wall 11 of the device is a smooth structure 111, which is in contact with the borehole wall. The smooth outer wall reduces the coefficient of friction, making it easier for the device to be installed into the borehole. The outer wall 11 is smooth and has slits or holes, with the slit width or hole diameter being 0.02–2 mm. The smaller the soil particle size, the smaller the width or diameter. For example, when the soil is silt, clay, or fine sand, the slit width or hole diameter is 0.02–0.5 mm; when the soil is coarse sand or gravel, the slit width or hole diameter is 1–2 mm.

[0047] like Figure 3 In the example shown, the soil stratum is medium sand, and the outer wall 11 of the device is cut with a width of 0.6 mm.

[0048] The inner side of the outer wall 11 of the device has a corrugated groove structure 112, which ensures that the outer wall has a certain strength and a certain axial bending performance.

[0049] The material of the outer wall 11 of the device should be determined according to the usage conditions. Generally, ordinary carbon steel or alloy steel can be selected as the material of the outer wall 11 of the device; when the soil and / or groundwater of the contaminated site contains corrosive pollutants, it is advisable to select materials with strong corrosion resistance, such as 304 stainless steel, 316 stainless steel, or other types of steel coated with corrosion-resistant paint; when the device requires greater axial bending performance, it is advisable to select materials with better elasticity, such as spring steel, and coat them with paint.

[0050] The corrugated groove structure 112 on the inner side of the outer wall 11 of the device has an overall thickness of 2-4 mm, a groove width of 1-2 mm, a groove spacing of 1-2 mm, and a height of 1-2 mm from the bottom to the top of the groove.

[0051] The thickness of the outer wall 11 of the device is affected by the length of the device and the axial bending angle of the device. The longer the device and the more perpendicular it is to the ground, the more material is used for its outer wall 11 and the heavier it is. In this case, a thicker outer wall is required to ensure its strength and prevent the outer wall 11 from breaking under its own weight. Conversely, a thinner outer wall 11 can be used.

[0052] The trench width, trench spacing, and trench height together constitute the trench's shape, primarily affecting the bending performance of the outer wall 11 of the device and its heat dissipation efficiency to the surrounding soil and groundwater. Closer trench spacing results in higher trench density and higher heat dissipation efficiency, but it also affects the pipe wall strength, reducing its bending resistance; therefore, the trench spacing should not be too close. Conversely, excessively large trench spacing indicates lower trench density, which increases the weight of the outer wall 11, requires more material, and reduces surface area, thus lowering heat dissipation efficiency. Therefore, the trench spacing should also not be too large.

[0053] After taking into account various factors, the corrugated groove structure on the inner side of the outer wall 11 of the device of the present invention adopts the above parameters.

[0054] Preferably, the outer wall 11 of this device with a corrugated groove structure on the inner side is processed by a tube rolling process. First, corrugated grooves are processed on the plate, and then the grooves are rolled inward and the rolled plate is welded to form a tube.

[0055] like Figure 4 In the example shown, the overall thickness is 2mm, the groove width is 1mm, the groove spacing is 1mm, and the height from the bottom to the top of the groove is 1mm.

[0056] The outer wall 11 of the device has slits or holes 110, which are used to ensure that soil gas passes through the outer wall 11 of the device and enters the extraction device layer 1. The width of the slits or the diameter of the holes are designed according to the soil particle size.

[0057] In this embodiment, a fine mesh screen is installed on the inner side of the outer wall 11 of the device to further prevent soil particles from entering the extraction device layer.

[0058] In this embodiment, the support plate 12 is located inside the extraction device layer 1, the support plate 12 is connected to the inner side wall of the outer wall 11 of the device, and the support plate 12 is connected to the outer side of the outer wall 21 of the heating device.

[0059] For the specific structure of support plate 12, please refer to Figure 6 and Figure 7 As shown:

[0060] In this embodiment, the support plate 12 has a circular ring structure and a heating device mounting hole 121 located at the center of the support plate 12. The heating device mounting hole 121 is used to install the heating device 22. The support plate 12 also has a monitoring device mounting hole 122 with an internal thread structure, which is used to install the monitoring device 13. The support plate 12 also has ventilation and weight reduction holes 123, which ensure smooth airflow through the support plate 12 while maintaining its strength, and reduce its weight.

[0061] The support plate 12 has a diameter of 50–100 mm and a thickness of 2–5 mm. The central hole of the support plate 12 has a diameter of 10–18 mm. The monitoring device mounting hole 122 has a diameter of 7–12 mm and is equipped with an internal thread structure. Each support plate 122 has six monitoring device mounting holes 122, arranged symmetrically. Ventilation and weight reduction holes 123 are located in positions other than the central hole and the monitoring device mounting holes 122, at least 3 mm away from other holes, and are arranged symmetrically. The area of ​​the perforated parts of the support plate 12 is more than 50% of the area of ​​the non-perforated parts.

[0062] Among the above parameters, "the ventilation and weight reduction hole 123 is located in a position other than the center hole and the monitoring device mounting hole 122, and the distance between it and other holes is at least 3mm". The distance of 3mm is designed here as a result of comprehensive consideration of structural strength and ease of machining.

[0063] Among the above parameters, "the area of ​​the perforated part of the support plate 12 is more than 50% of the area of ​​the non-perforated part" mainly constrains the area of ​​the ventilation and weight reduction holes 123. The important function of the ventilation and weight reduction holes 123 is to allow extracted gas to pass through them. Too small a hole area will lead to a large pressure loss, which is not conducive to gas extraction; too large a hole area will lead to a significant decrease in the structural strength of the support plate 12, making it unable to play a supporting role. After comprehensive consideration, this invention has constrained this parameter.

[0064] In this embodiment, there are four monitoring device mounting holes 122 and four ventilation weight reduction holes 123, and the four monitoring device mounting holes 122 and four ventilation weight reduction holes 123 are symmetrically distributed, with intervals between them.

[0065] like Figure 6 and Figure 7 In the example shown, the support plate 12 has a diameter of 70 mm. The central hole of the support plate 12 has a diameter of 14 mm. The monitoring device mounting hole 122 has a diameter of 10 mm, and the internal thread specification is not required. There are four monitoring device mounting holes 122 on each support plate 12, symmetrically distributed. There are four ventilation and weight reduction holes 123, symmetrically distributed, and the distance between them and the other holes is 5 mm. The area of ​​the support plate 12 with holes is 60.18% of the area without holes.

[0066] The specific structure of monitoring device 13 can be referred to Figure 8 , Figure 9 and Figure 10 As shown

[0067] In this embodiment, the monitoring device 13 includes a probe 14 located at the foremost end. A stud 15 is connected to the rear end of the probe 14. The stud 15 has an external thread 15. A limiting plate 16 is connected to the rear end of the stud 15. The diameter of the limiting plate 16 is larger than that of the stud 15. A signal line 17 is connected to the rear end of the limiting plate 16. The signal line 17 is used to transmit electrical signals. A protective cover 18 is connected to the outer wall of the stud 15 to protect the probe 14 from damage.

[0068] The monitoring device 13 monitors the soil temperature by converting temperature signals into electrical signals using thermocouples. This invention constrains the structure of the thermocouple temperature measurement section to make it suitable for the application environment of this invention; the probe 14, located at the very front of the monitoring device 13, is the thermocouple structure for temperature monitoring.

[0069] The structure of a thermocouple mainly consists of thermoelectrodes, insulating tubes, protective sleeves, junction boxes, and terminals.

[0070] 1. Thermocouple: This is the core component of a thermocouple, composed of two different conductors or semiconductors. When the temperatures at the two junctions of the thermocouple are different, a thermoelectric electromotive force is generated.

[0071] 2. Insulating tube: Used to prevent short circuit between the two thermoelectrodes; its material depends on the temperature measurement range.

[0072] 3. Protective sheath: Used to protect thermocouples from mechanical damage and chemical corrosion, while also preventing heat loss. The selection of the protective sheath should take into account its material, temperature resistance, and installation environment.

[0073] 4. Junction Box: Primarily used for connecting the thermocouple reference terminal to the compensating conductor. The junction box should be designed for easy installation and disassembly, and should also have good sealing performance to prevent moisture and dust from entering.

[0074] 5. Terminal blocks: Used to connect thermocouples and compensating wires, and should have good conductivity and stability.

[0075] In addition, depending on the usage environment and requirements, there are various types of thermocouples, such as armored thermocouples, multi-point thermocouples, explosion-proof thermocouples, and surface thermocouples. These types of thermocouples may differ slightly in structure, but they all follow the basic principles and structural requirements of thermocouples.

[0076] In summary, the structural design of thermocouples should take into account factors such as the operating environment, temperature measurement range, accuracy requirements, and stability to ensure that they can measure temperature accurately and reliably.

[0077] Monitoring device 13 Figure 8 , Figure 9 and Figure 10As shown. The monitoring device 13 consists of a signal line 17, a limiting plate 16, a stud 15 structure, a probe 14, and a protective cover 18. The sheathing material of the signal line 17 should be a high-temperature resistant material, such as fiberglass, stainless steel braided layer, polyimide, etc.

[0078] The diameter of the limit plate 16 should be 4 to 10 mm larger than the diameter of the mounting hole 122 of the monitoring device.

[0079] The stud 15 should be longer than the lower internal thread 19 of the protective cover 18. The length of the stud 15 can be 6 to 10 mm.

[0080] The protective cover 18 is connected to the stud 15 via the lower internal thread 19. The thread specification is not limited, but the length of the lower internal thread 19 of the protective cover 18 should be shorter than the thread length of the stud 15. The length of the lower internal thread 19 of the protective cover 18 can be 4 to 10 mm.

[0081] The protective cover 18 is connected to the internal thread of the monitoring device mounting hole 122 through the lower external thread 15. The thread specification is not limited, but the length of the lower external thread 15 of the protective cover 18 should be greater than the thickness of the support plate 12. The length of the lower external thread 15 of the protective cover 18 can be 4 to 10 mm.

[0082] The core principle for setting the dimensions and specifications of the monitoring device 13 is to design it around the dimensions of the probe 14. The reason why the present invention does not specify the specifications of the probe 14 is that the probe 14 is a mature product, and various manufacturers have mature solutions for its specifications and dimensions, which are generally less than 5mm in diameter.

[0083] The stud 15 is designed to fit the diameter of the probe 14. It is hollow inside, and the signal line 17 passes through it and is connected to the probe 14.

[0084] The outer diameter and thread length of the stud 15 structure are designed for ease of construction, and are set to 6-10mm.

[0085] Similarly, the length of the lower section of the internal thread 19 of the protective cover 18 is also for ease of construction. In addition, the length of the lower section of the internal thread 19 of the protective cover 18 also takes into account that the upper part of the protective cover 18 can be completely covered by the probe 14, so the length of this thread section is designed to be less than the length of the thread of the stud 15.

[0086] To ensure that the limiting plate 16 can function as a limiting device, its diameter is designed to be larger than the diameter of the monitoring device mounting hole 122. Considering factors such as ease of installation, machining tolerances, material strength, and cost, its diameter is designed to be 4–10 mm larger than the diameter of the mounting hole.

[0087] like Figure 11The dimensions of the monitoring device 13 are shown. The thickness of the limiting plate 16 is 2 mm. The length of the stud 15 is 10 mm. The overall length of the protective cover 18 is 20 mm; the length of the lower section internal thread 19 of the protective cover 18 is 6 mm; the length of the lower section external thread 15 of the protective cover 18 is 6 mm; the diameter of the protective cover 18 is 10 mm; and the diameter of the limiting plate 16 is 14 mm. The upper section of the protective cover 18 is mesh.

[0088] In this embodiment, the upper section of the protective cover 18 is a breathable structure, and the lower section of the protective cover 18 is provided with a lower section internal thread 9. The breathable structure is mesh, slit, or drilled, so that soil air can make good contact with the probe 14. It can be mesh, slit, or drilled. The width of the mesh, slit, or drilled part of the protective cover 18 is designed according to the soil particle size.

[0089] The specific structure of the outer wall 21 of the heating device can be referred to Figure 5 As shown:

[0090] In this embodiment, the outer side of the heating device outer wall 21 is corrugated groove 211 to ensure that the heating device outer wall 21 has a certain strength and a certain axial bending performance. The heating device outer wall 21 provides a fixing point for the installation of the support plate 12. The inner side of the heating device outer wall 21 is smooth 212 to avoid axial displacement of the support plate 12. The inner wall of the heating device 22 is closely connected to the heating device 22, which can effectively improve the heat conduction efficiency.

[0091] The material of the outer wall 21 of the heating device should be determined according to the usage conditions. Compared with the outer wall 11, the outer wall 21 of the heating device should have higher high-temperature resistance. Generally, ordinary carbon steel or alloy steel can be selected as the material of the outer wall 21 of the heating device. When the soil and / or groundwater of the contaminated site contain corrosive pollutants, it is advisable to select materials with strong corrosion resistance, such as 304 stainless steel, 316 stainless steel, or other types of steel coated with corrosion-resistant and high-temperature resistant paint. When the device requires greater axial bending performance, it is advisable to select materials with better elasticity, such as spring steel, and coat them with paint.

[0092] The corrugated groove structure 112 on the outer side of the outer wall 21 of the heating device is the same as the structure on the inner side of the outer wall 11 of the device, that is: the overall thickness is 2 to 4 mm, the groove width is 1 to 2 mm, the groove spacing is 1 to 2 mm, and the height from the bottom of the groove to the top of the groove is 1 to 2 mm.

[0093] like Figure 5 In the example shown, the overall thickness is 2mm, the groove width is 1mm, the groove spacing is 1mm, and the height from the bottom to the top of the groove is 1mm.

[0094] In this embodiment, the heating device 22 is a heating resistor; the heating resistor can be a single-core, dual-core heating or other heating forms. The heating device 22 is a mature heating device and belongs to the prior art. The present invention does not limit the structure of the heating device 22.

[0095] The length of this device can be adjusted according to the site conditions. This is achieved by shortening the outer wall 11 and heating device 22 accordingly when the device length is longer than the required length (e.g., drilling length); and by extending the outer wall 11 and heating device 22 accordingly when the device length is shorter than the required length (e.g., drilling length). The extension of the outer wall 11 can be achieved through welding, riveting, or other methods; these are mature technologies and are not limited in this patent. The extension of the heating device 22 can be achieved through junction box connection or direct extension; these are also mature technologies and are not limited in this patent.

[0096] Examples of application scenarios for the device of the present invention are as follows: Figure 12 As shown, the device of the present invention can be applied in curved soil boreholes, and is particularly suitable for construction under obstacles.

[0097] First, the device integrates soil heating, soil gas extraction, and soil gas temperature monitoring functions; second, the device is flexible and can extend under or around obstacles; third, the length of the device can be adjusted according to the site conditions.

[0098] It should be noted that the equipment required for in-situ heating and extraction monitoring of soil under obstacles can be used in the following steps and methods:

[0099] 1. Safety Considerations: There may be unknown underground structures or facilities beneath the obstacle, such as cables, pipes, etc. A detailed underground structure survey should be conducted before heating and extraction to ensure that the heating and extraction process will not damage these facilities. At the same time, relevant safety regulations and operating procedures should be followed to ensure the safety of personnel and the site.

[0100] 2. Environmental Impact Assessment: The soil beneath the obstruction may be contaminated to varying degrees, and the thermal extraction process may release pollutants. Therefore, an environmental impact assessment is necessary to determine the environmental impact of the thermal extraction process and to take appropriate measures to control and reduce environmental pollution.

[0101] 3. Monitoring Equipment Selection: Based on the soil characteristics under the obstacle and the extraction requirements, select suitable monitoring equipment. The monitoring equipment should have high precision, high stability, and high reliability, and be able to accurately monitor changes in parameters such as soil temperature, humidity, and pollutant concentration.

[0102] 4. Monitoring Process Control: During the heating and extraction process, strict monitoring procedures should be followed to ensure the accuracy and reliability of the monitoring data. Data should be recorded regularly during monitoring, and the data should be analyzed and processed to promptly identify any abnormalities and take appropriate measures.

[0103] 5. Data Analysis and Processing: After monitoring is completed, the data should be analyzed and processed in detail to extract useful information. Through data analysis and processing, the pollution status of the soil under the obstacle and the effect of heat extraction can be understood, providing a scientific basis for subsequent soil remediation work.

[0104] 6. Recording and Reporting: Throughout the monitoring process, detailed records should be kept of monitoring data, operational procedures, and any abnormal situations, and a monitoring report should be prepared. The report should clearly describe the monitoring process, results, and recommendations to provide a reference for relevant decision-making.

[0105] In summary, when conducting in-situ heating and extraction monitoring of soil under obstacles, attention should be paid to safety, environment, equipment, process control, data analysis and processing, as well as recording and reporting, to ensure the accuracy and reliability of the monitoring.

[0106] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. An integrated device for in-situ heating, extraction, and monitoring of soil under obstacles, characterized in that, It includes a double-layer structure from the outside to the inside, namely an extraction device layer (1) and a heating device layer (2); The extraction device layer (1) consists of, from the outside to the inside, the outer wall of the device (11), the support plate (12), and the monitoring device (13). The heating device layer (2) consists of the outer wall (21) of the heating device and the heating device (22) from the outside to the inside. The outer side of the outer wall (11) of the device is a smooth structure (111), and the inner side of the outer wall (11) of the device is a corrugated groove structure (112); there are slits or holes (110) on the outer wall (11). The support plate (12) is located inside the extraction device layer (1). The support plate (12) is connected to the inner side wall of the outer wall (11) of the device and to the outer side of the outer wall (21) of the heating device. The support plate (12) is a ring structure. The support plate (12) is provided with a heating device mounting hole (121), and the heating device mounting hole (121) is located at the center of the support plate (12); The support plate (12) has a monitoring device mounting hole (122), and the monitoring device mounting hole (122) has an internal thread structure; The support plate (12) is provided with ventilation and weight reduction holes (123); The outer side of the outer wall (21) of the heating device is corrugated groove (211), and the outer wall (21) of the heating device provides a fixing point for the installation of the support plate (12); The inner side of the outer wall (21) of the heating device is smooth (212), and the inner side of the outer wall (21) of the heating device is in close contact with the heating device (22).

2. The integrated device for in-situ heating, extraction, and monitoring of soil under obstacles as described in claim 1, characterized in that: A fine mesh screen is installed on the inner side of the outer wall (11) of the device.

3. The integrated device for in-situ heating, extraction, and monitoring of soil under obstacles as described in claim 1, characterized in that: The number of the monitoring device mounting holes (122) and the ventilation and weight reduction holes (123) are both four; Furthermore, the four monitoring device mounting holes (122) and the ventilation weight reduction holes (123) are symmetrically distributed, and the monitoring device mounting holes (122) and the ventilation weight reduction holes (123) are spaced apart.

4. The integrated device for in-situ heating, extraction, and monitoring of soil under obstacles as described in claim 1, characterized in that: The monitoring device (13) includes a probe (14) located at the foremost end; The probe (14) is connected to a stud (15) at its rear end. The stud (15) has an external thread (15) and a limit plate (16) is connected to the rear end of the stud (15). The diameter of the limiting plate (16) is larger than that of the stud (15). The rear end of the limiting plate (16) is connected to a signal line (17), and the outer wall of the stud (15) is connected to a protective cover (18).

5. The integrated device for in-situ heating, extraction, and monitoring of soil under obstacles according to claim 4, characterized in that: The upper section of the protective cover (18) is a breathable structure, and the lower section of the protective cover (18) is provided with a lower section internal thread (19). The breathable structure is mesh, slit, or drilled.

6. The integrated device for in-situ heating, extraction, and monitoring of soil under obstacles according to claim 1, characterized in that: The heating device (22) is a heating resistor.

Images