A bipolar high-voltage electrode soil remediation device and method based on infrared imaging regulation
The bipolar high-voltage electrode system, which utilizes infrared imaging monitoring and dynamic control, solves the problems of uneven electric field and energy waste in soil remediation, achieving efficient and flexible soil remediation results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TONGLING UNIV
- Filing Date
- 2026-03-25
- Publication Date
- 2026-06-09
AI Technical Summary
Existing bipolar high-voltage electrode soil remediation technology lacks a real-time feedback adjustment mechanism, resulting in excessively strong or weak local electric fields, uneven remediation, and static voltage parameter adjustment that cannot adapt to soil conditions, leading to energy waste and incomplete remediation.
An infrared imaging monitoring module is used to capture the soil thermal distribution in real time. Combined with a thermal map analysis and control module, the electrode layout and voltage parameters are dynamically adjusted to form a closed-loop control system, which enables real-time correction of excessive discharge and electric field blind zone.
It improves the uniformity and efficiency of remediation, reduces energy consumption, extends electrode life, and can be flexibly adjusted to adapt to different soil and pollutant scenarios, thereby reducing remediation costs.
Smart Images
Figure CN122164740A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of soil pollution remediation technology, specifically to a bipolar high-voltage electrode soil remediation device and method based on infrared imaging control. Background Technology
[0002] Heavy metal and recalcitrant organic pollutant pollution in soil has become an urgent environmental problem. Electrochemical remediation technology has been widely studied and applied in this field due to its advantages such as in-situ remediation and adaptability to low-permeability soils. Bipolar high-voltage electrode technology can enhance the electromigration and oxidative degradation of pollutants by applying positive and negative electric fields. Compared with traditional unipolar electrodes, it can reduce electrode polarization and corrosion and improve the uniformity of remediation.
[0003] However, existing bipolar high-voltage electrode soil remediation technology has significant shortcomings: (1) The electrode layout is mostly based on experience and lacks a real-time feedback adjustment mechanism. Due to the heterogeneity of soil texture, porosity and pollutant distribution, it is easy to cause local electric fields to be too strong and form discharge hot spots, or local electric fields to be weak and create remediation blind spots, affecting the remediation effect and efficiency. (2) Voltage parameter adjustment is mostly static setting, which cannot be dynamically adapted according to the discharge state in the soil, which can easily lead to energy waste or incomplete repair. (3) Existing monitoring methods are mostly offline sampling and detection, which cannot capture the correlation between electrode discharge state and pollutant degradation process in real time, making it difficult to achieve precise control of the remediation process.
[0004] Infrared imaging technology can acquire the thermal distribution of objects in real time without contact, and has shown great application potential in the field of environmental monitoring. In existing technologies, infrared imaging is mostly used alone for post-remediation evaluation of remediation effects, and has not yet been combined with bipolar high-voltage electrode remediation technology to form a closed-loop system of "discharge monitoring - parameter control - layout optimization". Therefore, developing a bipolar high-voltage electrode soil remediation technology based on real-time control using infrared imaging to solve the problems of blind control and uneven remediation in existing technologies has significant engineering value and application prospects. Summary of the Invention
[0005] The purpose of this invention is to provide a bipolar high-voltage electrode soil remediation device and method based on infrared imaging control, so as to solve the problems existing in the prior art mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: A soil remediation device based on infrared imaging and controlled by a bipolar high-voltage electrode includes: A bidirectional high-voltage power supply, wherein the output end of the bidirectional high-voltage power supply is connected to a bipolar high-voltage electrode assembly via a high-voltage wiring harness, and is used to output positive and negative DC high-voltage pulses with an amplitude of ±10kV~±50kV and a frequency of 5Hz~20Hz. An infrared imaging monitoring module is mounted on a gimbal bracket. The gimbal bracket enables the infrared imaging monitoring module to perform real-time imaging of the soil in the pre-buried electrode area with full coverage. The thermal map analysis and control module establishes bidirectional signal connections with the infrared imaging monitoring module and the bidirectional high-voltage power supply via communication lines. The thermal map analysis and control module has built-in image processing algorithms and control logic, which are used to perform real-time feature extraction, hot spot identification and uniformity analysis of soil thermal maps, and automatically output electrode layout optimization instructions and voltage parameter adjustment signals based on the analysis results.
[0007] Preferably, the bipolar high-voltage electrode assembly includes a high-voltage electrode one and a high-voltage electrode two, which are made of high-voltage corrosion resistant materials, and the electrode surfaces are covered with an insulating protective layer, with only the working end face exposed. Several of the aforementioned bipolar high-voltage electrode assemblies are arranged in an array using modular fasteners. The spacing between adjacent electrodes can be adjusted using the fasteners, with an adjustment range of 30cm to 150cm. The contact area between the working end face of the electrode and the soil is not less than 50cm².
[0008] Preferably, the infrared imaging monitoring module has a spectral range of 8μm to 14μm, a spatial resolution of not less than 0.5mm, and a sampling frequency of not less than 10Hz.
[0009] Preferably, the high-pressure corrosion resistant material of the bipolar high-voltage electrode assembly is a titanium-based ruthenium coating material or a carbon fiber composite material, the insulating protective layer is made of polytetrafluoroethylene with a thickness of 1~3mm; the working end face is provided with an annular conductive protrusion with a protrusion height of 5~8mm to enhance the local electric field strength, the electrode diameter is 40~60mm and the length is 600~1000mm. Preferably, the bipolar high-voltage electrode assembly is arranged in a modular plug-in manner, so that new electrodes can be quickly connected to a bidirectional high-voltage power supply.
[0010] A soil remediation method includes the following steps: S1: Electrode pre-embedding and system deployment: Based on the results of the contaminated soil survey, determine the boundary of the remediation area and the distribution of contamination concentration. Pre-embedding the bipolar high-voltage electrode assembly in the soil to be remediated in an array with an initial spacing of 50cm~100cm to ensure that the working end face of the electrode is in full contact with the contaminated soil. The infrared imaging monitoring module is deployed 1.5~2.5m above the repair area. The monitoring angle is adjusted by the gimbal bracket to ensure that the monitoring range completely covers the entire electrode working area. The electrical connection of each module and signal debugging are completed, and the temperature measurement accuracy is calibrated to ±0.5℃. S2: Initial voltage application: Start the bidirectional high voltage power supply, set the initial voltage amplitude to ±15kV~±25kV and the frequency to 8Hz~12Hz, apply positive and negative DC high voltage pulses between the electrodes, use the electric field to drive the migration of heavy metal ions, and at the same time generate free radicals through the electrical breakdown effect to degrade recalcitrant organic pollutants and start the soil remediation process. S3: Real-time acquisition of infrared thermal map: The infrared imaging monitoring module is activated to continuously acquire thermal map data of the soil electrode area at a sampling interval of 50~100ms, and transmit it synchronously to the thermal map analysis and control module to ensure real-time capture of the dynamic changes of discharge hot spots and electric field blind areas in the soil. S4: Thermal Map Analysis and Parameter Evaluation: The thermal map analysis and control module processes the thermal map using image processing algorithms, extracts the temperature values, temperature gradients, and hot spot distribution characteristics of each region, judges the uniformity of electrode discharge, and determines the situation of excessive discharge and electric field blind zone. S5: Electrode layout and voltage optimization control logic: Output targeted control commands based on analysis results. For areas with excessive discharge, reduce the voltage amplitude of the corresponding electrodes by 5kV~10kV, or increase the distance between adjacent electrodes by 20cm~30cm through modular fasteners. For areas with no electric field, new electrodes are added through modular plug-in or the voltage frequency of adjacent electrodes is increased by 3Hz to 5Hz. After adjustment, the repair process is maintained, and infrared monitoring and dynamic control are continuously performed to ensure discharge uniformity. S6: Repair Termination and Effect Detection: When the proportion of hot spots in the soil thermogram is less than 5% within 30 consecutive minutes, there are no obvious electric field blind spots, and the standard is met, stop applying voltage, remove the equipment, and the repair is completed.
[0011] Preferably, the specific steps of the image processing algorithm in S4 are as follows: First, the heat map is converted to grayscale and noise is filtered. Then, temperature threshold segmentation is performed. Subsequently, hot spots are located and temperature gradients are calculated. Finally, the uniformity evaluation results are output.
[0012] Preferably, the specific steps for determining excessive discharge and electric field blind zone in S4 are as follows: If the temperature in the hot spot exceeds 80℃ or the temperature gradient is greater than 5℃ / cm, it is determined to be excessive discharge; if there is a continuous area with a size greater than 0.01m² and a temperature lower than 25℃, it is determined to be an electric field blind zone.
[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention captures the thermal characteristics of soil discharge in real time through infrared imaging, and combines this invention's remediation method to determine the situation of excessive discharge and electric field blind zone. Based on the determination, the parameters of the remediation device are adjusted, breaking through the limitations of traditional technology's "static setting and offline detection", forming a closed-loop control system, effectively avoiding the problems of excessive discharge and electric field blind zone, and improving the uniformity and effect of remediation.
[0014] 2. This invention dynamically adjusts voltage parameters and electrode layout to avoid ineffective energy consumption while ensuring remediation effectiveness. It also reduces electrode corrosion caused by excessive discharge, extends electrode lifespan, and lowers remediation costs. Furthermore, it allows for flexible adjustment of voltage amplitude, frequency, and electrode layout based on soil heterogeneity and pollution type. It is suitable for low-permeability soils such as clay and silt, as well as single or combined pollution scenarios involving heavy metals and recalcitrant organic pollutants, demonstrating good engineering applicability. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the soil remediation device of the present invention.
[0016] Figure 2 This is a flowchart of the soil remediation method of the present invention.
[0017] Figure 3 This is a schematic diagram of soil thermogram analysis in an embodiment of the present invention.
[0018] In the diagram: 1. Bidirectional high-voltage power supply; 2. High-voltage wiring harness; 3. High-voltage electrode one; 4. High-voltage electrode two; 5. Gimbal bracket; 6. Infrared imaging monitoring module; 7. Thermal map analysis and control module; 8. Communication line; 9. Soil. Detailed Implementation
[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.
[0020] Please see Figure 1-3 The present invention provides the following technical solutions: A soil remediation device based on infrared imaging control with bipolar high-voltage electrodes includes: a bidirectional high-voltage power supply 1, the output end of which is connected to a bipolar high-voltage electrode assembly via a high-voltage wiring harness 2, and is used to output positive and negative DC high-voltage pulses with an amplitude of ±10kV~±50kV and a frequency of 5Hz~20Hz.
[0021] The bidirectional high-voltage power supply 1 has real-time feedback and stepless adjustment functions for voltage amplitude and frequency, and the delay in responding to control commands does not exceed 100ms. The bidirectional high-voltage power supply 1 can quickly respond to parameter adjustments according to the instructions of the thermogram analysis and control module 7 to ensure the stability and adaptability of the applied electric field.
[0022] The bipolar high-voltage electrode assembly includes a first high-voltage electrode 3 and a second high-voltage electrode 4. The first high-voltage electrode 3 and the second high-voltage electrode 4 are made of high-pressure corrosion resistant materials, and the electrode surfaces are covered with an insulating protective layer, with only the working end face exposed.
[0023] Several of the aforementioned bipolar high-voltage electrode assemblies are arranged in an array using modular fasteners. The spacing between adjacent electrodes can be adjusted using the fasteners. The electrode spacing can be flexibly adjusted according to soil heterogeneity to adapt to different pollution ranges and scenarios. The adjustment range is 30cm to 150cm. The contact area between the working end face of the electrode and the soil is not less than 50cm², ensuring that the working end face of the electrode is in full contact with the polluted soil.
[0024] The high-pressure corrosion resistant material of the bipolar high-voltage electrode assembly is a titanium-based ruthenium coating material or a carbon fiber composite material, and the insulating protective layer is made of polytetrafluoroethylene with a thickness of 1~3mm; the working end face is provided with an annular conductive protrusion with a protrusion height of 5~8mm, which is used to enhance the local electric field strength and promote the degradation of pollutants. The electrode diameter is 40~60mm and the length is 600~1000mm. The bipolar high-voltage electrode assembly adopts a modular plug-in layout, which allows for quick connection of new electrodes to the bidirectional high-voltage power supply 1 and facilitates electrode adjustment based on data feedback.
[0025] The infrared imaging monitoring module 6 is mounted on the gimbal bracket 5. The gimbal bracket 5 enables the infrared imaging monitoring module 6 to perform real-time imaging of the soil 9 in the pre-buried electrode area with full coverage. The infrared imaging monitoring module 6 has a spectral range of 8μm~14μm, which can penetrate the soil surface to obtain deep discharge thermal signals. The spatial resolution is not less than 0.5mm, and the sampling frequency is not less than 10Hz. The sampling frequency of 10Hz or higher can accurately capture the dynamic changes of the discharge state and provide real-time data support for control decisions.
[0026] The thermal map analysis and control module 7 establishes bidirectional signal connections with the infrared imaging monitoring module 6 and the bidirectional high-voltage power supply 1 via communication line 8. The module 7 incorporates image processing algorithms and control logic for real-time feature extraction, hotspot identification, and uniformity analysis of the soil thermal map. Based on the identification results, the control logic outputs step-by-step control commands to the bidirectional high-voltage power supply 1 and provides electrode layout optimization suggestions. A correlation model of "temperature distribution - discharge state - control parameters" is established, automatically outputting electrode layout optimization and voltage adjustment commands to achieve closed-loop control of the remediation process.
[0027] The present invention also provides a soil remediation method, comprising the following steps: S1: Electrode pre-embedding and system deployment: Based on the results of the contaminated soil survey, determine the boundary of the remediation area and the distribution of contamination concentration. Pre-embedding the bipolar high-voltage electrode assembly in the soil to be remediated in an array with an initial spacing of 50cm~100cm to ensure that the working end face of the electrode is in full contact with the contaminated soil. The infrared imaging monitoring module 6 is deployed 1.5~2.5m above the repair area. The monitoring angle is adjusted by the gimbal bracket 5 so that the monitoring range completely covers the entire electrode working area. The electrical connection of each module and signal debugging are completed, and the temperature measurement accuracy is calibrated to ±0.5℃. S2: Initial voltage application: Start the bidirectional high voltage power supply 1, set the initial voltage amplitude to ±15kV~±25kV and the frequency to 8Hz~12Hz, apply positive and negative DC high voltage pulses between the electrodes, use the electric field to drive the migration of heavy metal ions, and at the same time generate free radicals through the electrical breakdown effect to degrade recalcitrant organic pollutants and start the soil remediation process. S3: Real-time acquisition of infrared thermal map: The infrared imaging monitoring module 6 is activated to continuously acquire thermal map data of the soil electrode area at a sampling interval of 50~100ms, and transmit it synchronously to the thermal map analysis and control module 7 to ensure real-time capture of the dynamic changes of discharge hot spots and electric field blind areas in the soil. S4: Thermal Map Analysis and Parameter Evaluation: The thermal map analysis and control module 7 processes the thermal map using image processing algorithms, extracts the temperature values, temperature gradients and hot spot distribution characteristics of each region, judges the uniformity of electrode discharge, and determines the situation of excessive discharge and electric field blind zone. The image processing algorithm includes a perspective correction unit, a median filtering unit, and a feature recognition unit. The specific steps of the image processing algorithm are as follows: first, the heat map is converted to grayscale and noise is filtered; then, temperature threshold segmentation is performed; subsequently, hotspot areas are located and temperature gradients are calculated; finally, the uniformity evaluation result is output.
[0028] Image processing algorithms are executed according to the following logic: (1) The perspective correction unit obtains the pixel coordinates (w, h) of the infrared reflection markers preset at the four vertices of the electrode array, constructs the homography matrix H, maps the original distorted thermal map into an orthophoto map with consistent physical units, and calibrates the temperature accuracy at the same time.
[0029] (2) The median filtering unit sorts all gray values in the neighborhood of the pixel and takes the median value as the median value of the pixel in the output extraction window to remove the pulse noise generated by instantaneous discharge, while ensuring the boundary features between the electrode and the soil.
[0030] (3) The feature recognition unit performs a two-dimensional judgment: Excessive discharge determination: Identify regions with temperature T > 80℃ in the orthographic projection image, and regions with temperature gradient G > 5℃ / cm calculated using the Sobel operator; Electric field blind zone determination: Identify continuous regions with temperature T < 25℃ and continuous physical area S > 0.01m².
[0031] S5: Electrode layout and voltage optimization control logic: Output targeted control commands based on analysis results. For areas with excessive discharge, reduce the voltage amplitude of the corresponding electrodes by 5kV~10kV, or increase the distance between adjacent electrodes by 20cm~30cm through modular fasteners to weaken the local electric field strength. For areas with no electric field, new electrodes are added through modular plug-in or the voltage frequency of adjacent electrodes is increased by 3Hz to 5Hz. After adjustment, the repair process is maintained, and infrared monitoring and dynamic control are continuously performed to ensure discharge uniformity. S6: Repair Termination and Effect Detection: When the proportion of hot spots in the soil thermogram is less than 5% within 30 consecutive minutes, there is no obvious electric field blind zone, and the concentration of the target pollutant in the soil is confirmed to have dropped below the relevant national standards through sampling and testing, the voltage application is stopped, the equipment is removed, and the repair is completed.
[0032] Example This embodiment uses Cr 6+ Taking the remediation of clay soil contaminated with polycyclic aromatic hydrocarbons as an example.
[0033] (1) Equipment deployment and parameter setting The soil area to be remediated is 10m × 10m × 0.8m (length × width × depth), Cr 6+ The concentration was 85 mg / kg, the polycyclic aromatic hydrocarbon concentration was 1200 mg / kg, the soil moisture content was 30%, and the porosity was 25%.
[0034] The bipolar high-voltage electrode assembly uses titanium-based ruthenium-coated electrodes with a diameter of 50 mm and a length of 800 mm. The working end face has an annular conductive protrusion and is covered with a polytetrafluoroethylene insulating layer, with only the bottom 200 mm of the working end face exposed. 169 bipolar electrodes are pre-embedded in the repair area at an initial spacing of 80 cm, arranged in a 13×13 array.
[0035] The bidirectional high-voltage power supply 1 is set with an initial voltage amplitude of ±20kV, a frequency of 10Hz, and an output voltage waveform of square wave pulse.
[0036] The infrared imaging monitoring module 6 uses a high-resolution infrared thermal imager with a spectral range of 8μm~14μm, a spatial resolution of 0.3mm, and a sampling frequency of 15Hz. It is deployed 2m above the repair area and the angle is adjusted by the gimbal bracket 5 to ensure that the monitoring range completely covers the electrode array area.
[0037] The thermal map analysis and control module 7 sets the temperature thresholds: the over-discharge judgment threshold is 80℃, the electric field blind zone judgment threshold is 25℃, and the temperature gradient judgment threshold is 5℃ / cm.
[0038] (2) Repair process and regulation After the system is started, a positive and negative DC high voltage of ±20kV and 10Hz is applied between the electrodes. The infrared thermal imager collects a soil thermal map every 80ms and transmits it to the control module.
[0039] After 15 minutes of repair, the thermal analysis and control module 7 found that hot spots with a temperature of 88℃ appeared between three adjacent electrodes in the center of the array, with a temperature gradient of 6.2℃ / cm, which was determined to be excessive discharge; there was a continuous area of 0.015m² with a temperature of 22℃ between four electrodes at the edge of the array, which was determined to be an electric field blind zone.
[0040] The thermal map analysis and control module 7 automatically outputs instructions: reduce the electrode voltage amplitude corresponding to the three hot spots in the center to ±15kV; add four bipolar electrodes in the edge electric field blind zone, adjust the spacing between adjacent electrodes to 60cm, and increase the electrode voltage frequency in this area to 14Hz.
[0041] During the continuous repair process, the system performs a comprehensive thermal analysis every 10 minutes and dynamically fine-tunes the voltage parameters to ensure that the proportion of hot spots is always less than 5% and there are no obvious electric field blind spots.
[0042] (3) Testing of repair effect After 72 hours of remediation, the soil thermogram remained stable for 30 consecutive minutes, with hotspot areas accounting for 3.2% and no electric field blind spots. Nine sampling points were randomly selected within the remediation area, and the test results showed that Cr... 6+ The concentration of polycyclic aromatic hydrocarbons (PAHs) was reduced to 0.8 mg / kg, and the concentration of PAHs was reduced to 85 mg / kg, both meeting the Class II land use standard of the "Soil Environmental Quality Standard for Construction Land Soil Pollution Risk Control" (GB 36600-2018). The remediation efficiency was improved by 35% compared to traditional bipolar electrode remediation technology, and energy consumption was reduced by 28%. The target pollutants of this invention include heavy metal ions (Pb). 2+ Cd 2+ Cr 6+ It contains one or more of polycyclic aromatic hydrocarbons and halogenated hydrocarbons, and is suitable for low-permeability contaminated soils such as clay and silt.
[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A soil remediation device based on infrared imaging control using a bipolar high-voltage electrode, characterized in that, include: A bidirectional high-voltage power supply (1) is provided with a bipolar high-voltage electrode assembly connected to its output end via a high-voltage wire harness (2), and is used to output positive and negative DC high-voltage pulses with an amplitude of ±10kV~±50kV and a frequency of 5Hz~20Hz. Infrared imaging monitoring module (6), the infrared imaging monitoring module (6) is installed on the gimbal bracket (5), and the gimbal bracket (5) can drive the infrared imaging monitoring module (6) to perform full-coverage real-time imaging of the soil (9) in the pre-buried electrode area; The thermal map analysis and control module (7) establishes a bidirectional signal connection with the infrared imaging monitoring module (6) and the bidirectional high voltage power supply (1) through the communication line (8). The thermal map analysis and control module (7) has built-in image processing algorithms and control logic, which are used to extract features, identify hot spots and analyze uniformity of soil thermal maps in real time. Based on the analysis results, it automatically outputs electrode layout optimization instructions and voltage parameter adjustment signals.
2. The bipolar high-voltage electrode soil remediation device based on infrared imaging control according to claim 1, characterized in that: The bipolar high-voltage electrode assembly includes a high-voltage electrode one (3) and a high-voltage electrode two (4). The high-voltage electrode one (3) and the high-voltage electrode two (4) are made of high-pressure corrosion resistant materials, and the electrode surfaces are covered with an insulating protective layer, with only the working end face exposed. Several of the aforementioned bipolar high-voltage electrode assemblies are arranged in an array using modular fasteners. The spacing between adjacent electrodes can be adjusted using the fasteners, with an adjustment range of 30cm to 150cm. The contact area between the working end face of the electrode and the soil is not less than 50cm².
3. The bipolar high-voltage electrode soil remediation device based on infrared imaging control according to claim 1, characterized in that: The infrared imaging monitoring module (6) has a spectral range of 8μm~14μm, a spatial resolution of not less than 0.5mm, and a sampling frequency of not less than 10Hz.
4. The bipolar high-voltage electrode soil remediation device based on infrared imaging control according to claim 1, characterized in that: The high-pressure corrosion resistant material of the bipolar high-voltage electrode assembly is a titanium-based ruthenium coating material or a carbon fiber composite material, and the insulating protective layer is made of polytetrafluoroethylene with a thickness of 1~3mm; the working end face is provided with an annular conductive protrusion with a protrusion height of 5~8mm to enhance the local electric field strength, and the electrode diameter is 40~60mm and the length is 600~1000mm.
5. The bipolar high-voltage electrode soil remediation device based on infrared imaging control according to claim 4, characterized in that: The bipolar high-voltage electrode assembly is laid out in a modular plug-in manner, so that new electrodes can be quickly connected to a bidirectional high-voltage power supply (1).
6. A soil remediation method based on the soil remediation device according to any one of claims 1-5, characterized in that, Includes the following steps: S1: Electrode pre-embedding and system deployment: Based on the results of the contaminated soil survey, determine the boundary of the remediation area and the distribution of contamination concentration. Pre-embedding the bipolar high-voltage electrode assembly in the soil to be remediated in an array with an initial spacing of 50cm~100cm to ensure that the working end face of the electrode is in full contact with the contaminated soil. The infrared imaging monitoring module (6) is deployed 1.5~2.5m above the repair area. The monitoring angle is adjusted by the gimbal bracket (5) so that the monitoring range completely covers the entire electrode working area. The electrical connection and signal debugging of each module are completed, and the temperature measurement accuracy is calibrated to ±0.5℃. S2: Initial voltage application: Start the bidirectional high voltage power supply (1), set the initial voltage amplitude to ±15kV~±25kV and the frequency to 8Hz~12Hz, apply positive and negative DC high voltage pulses between the electrodes, use the electric field to drive the migration of heavy metal ions, and at the same time generate free radicals through the electrical breakdown effect to degrade the recalcitrant organic pollutants and start the soil remediation process. S3: Real-time acquisition of infrared thermal map: Start the infrared imaging monitoring module (6) to continuously acquire thermal map data of the soil (9) electrode area at a sampling interval of 50~100ms, and transmit it synchronously to the thermal map analysis and control module (7) to ensure real-time capture of the dynamic changes of discharge hot spots and electric field blind areas in the soil; S4: Thermal map analysis and parameter evaluation: The thermal map analysis and control module (7) processes the thermal map according to the image processing algorithm, extracts the temperature value, temperature gradient and hot spot distribution characteristics of each region, judges the uniformity of electrode discharge, and determines the situation of excessive discharge and electric field blind zone. S5: Electrode layout and voltage optimization control logic: Output targeted control commands based on analysis results. For areas with excessive discharge, reduce the voltage amplitude of the corresponding electrodes by 5kV~10kV, or increase the distance between adjacent electrodes by 20cm~30cm through modular fasteners. For areas with no electric field, new electrodes are added through modular plug-in or the voltage frequency of adjacent electrodes is increased by 3Hz to 5Hz. After adjustment, the repair process is maintained, and infrared monitoring and dynamic control are continuously carried out. S6: Repair Termination and Effect Detection: When the proportion of hot spots in the soil thermogram is less than 5% within 30 consecutive minutes, there are no obvious electric field blind spots, and the standard is met, stop applying voltage, remove the equipment, and the repair is completed.
7. A soil remediation method according to claim 6, characterized in that, The specific steps of the image processing algorithm in S4 are as follows: First, the heat map is converted to grayscale and noise is filtered. Then, temperature threshold segmentation is performed. Subsequently, hot spots are located and temperature gradients are calculated. Finally, the uniformity evaluation results are output.
8. A soil remediation method according to claim 6, characterized in that, The specific steps for determining excessive discharge and electric field dead zone in S4 are as follows: If the temperature in the hot spot area exceeds 80℃ or the temperature gradient is greater than 5℃ / cm, it is determined to be excessive discharge. If there is a continuous area with a size greater than 0.01 m² and a temperature lower than 25 °C, it is determined to be an electric field blind zone.