Self-adjusting repairing system and repairing method for repairing soil and underground water

Abstract

The invention relates to the technical field of soil remediation, in particular to a self-adjusting remediation system and method for remediating soil and underground water, and the self-adjusting remediation system comprises a thermal desorption system, a self-adjusting system and a self-adjusting system, the negative pressure extraction system is used for realizing negative pressure extraction remediation on the soil; the aeration system is used for realizing gas injection repair on underground water; the energy supply system is used for providing electric energy for the thermal desorption system, the negative pressure extraction system and the aeration system; the energy supply system comprises wind power generation equipment, solar power generation equipment, a power supply module and a power storage module; and starting and stopping of the thermal desorption system and the negative pressure extraction system are adjusted according to the unit-time generating capacity of the wind power generation equipment, the unit-time generating capacity of the solar equipment and the electricity storage capacity of the electricity storage module. Soil and underground water can be repaired under the condition that no electric energy is used, high-power repairing equipment can be used, the repairing efficiency is improved, and the repairing time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of soil remediation, and particularly relates to a self-regulating remediation system and a remediation method for remediating soil and groundwater. Background Art

[0002] Soil is composed of minerals, organic matter, water, air, and biological organisms. With the development of the economy, as the ultimate receptor of most pollutants, the quality of soil is significantly affected. When the pollutants in the soil reach a certain level, it may cause adverse effects such as excessive pollutants in agricultural products for consumption, the health of local residents being affected, poor plant growth, and the decline in the quality of groundwater. Therefore, the remediation of contaminated soil and groundwater is extremely important.

[0003] The pollution sources of soil and groundwater are wide-ranging and diverse in types, and also have characteristics such as concealment, accumulation, long-term nature, and non-uniformity. Concealment means that soil pollution is usually not as easy to identify through the senses of vision and smell as air and water pollution, but requires methods such as soil sample analysis and crop detection for identification and judgment. Accumulation means that compared with the atmosphere and water bodies, pollutants are more difficult to migrate, diffuse, and dilute after entering the soil, and are prone to continuous accumulation. Long-term nature means that due to the slow degradation or difficulty in degrading some pollutants entering the soil (such as heavy metals), once soil pollution occurs, it is difficult to naturally eliminate in the short term. Non-uniformity means that the spatial distribution of pollutants in the soil is non-uniform and highly variable. In the same field, and even in samples collected from adjacent points of the polluted site, there will be differences in the pollutant content, posing challenges to the accurate monitoring of the degree of soil pollution.

[0004] The prior art CN206444998U discloses a device for remediating volatile organic compound contaminated soil, including an extraction well, an injection well, a dosing system, a gas collection hood, a purification pipeline, and an extraction air pipeline. It uses an extraction fan to extract the gas in the extraction well, creating a negative pressure in the extraction well. Under the action of the negative pressure, the medicament in the injection well penetrates from the injection well hole towards the extraction well hole due to the strong pressure, and chemically reacts with the pollutants in the soil to achieve the purpose of soil remediation. At the same time, the high-concentration toxic gas in the extraction well can be extracted, and then through the treatment of a water storage tank, an oil-water separator, a sewage treatment device, and a non-water-soluble pollutant treatment device, chemical agents are used to react and purify the toxic gas, and the extracted pollutants are purified to avoid secondary pollution.

[0005] The above-mentioned remediation device uses an extraction fan to extract gas. On the one hand, the power of the extraction fan is relatively low, resulting in a slow remediation process. On the other hand, the concentration of pollutants in the soil changes during the remediation process. If the same power of extraction is continuously used, it will cause waste of energy.

[0006] Therefore, it is necessary to provide a self-regulating remediation system and a remediation method for soil and groundwater. Summary of the Invention

[0007] To solve the above technical problems existing in the prior art, the present invention provides a self-regulating remediation system and a remediation method for soil and groundwater.

[0008] To achieve the above object, the technical solution of the present invention is as follows:

[0009] In the first aspect, the present invention provides a self-regulating remediation system for soil and groundwater, including:

[0010] A thermal desorption system for heating the soil;

[0011] A negative pressure extraction system for realizing negative pressure extraction and remediation of the soil;

[0012] An aeration system for realizing air injection and remediation of the groundwater;

[0013] An energy supply system for supplying electric energy to the thermal desorption system, the negative pressure extraction system and the aeration system;

[0014] The energy supply system includes a wind power generation device, a solar power generation device, a power supply module and a power storage module; the wind power generation device is connected to the power supply module and also to the power storage module; the solar power generation device is connected to the power supply module and also to the power storage module;

[0015] The power supply module is connected to the thermal desorption system, the negative pressure extraction system and the aeration system;

[0016] According to the power generation amount per unit time of the wind power generation device, the power generation amount per unit time of the solar device and the power storage amount of the power storage module, the activation and deactivation of the thermal desorption system and the negative pressure extraction system are adjusted.

[0017] Furthermore, the thermal desorption system includes heating wells which are vertically inserted into the soil, and the power supply module supplies electric energy to the heating wells.

[0018] Furthermore, the negative pressure extraction system includes, connected in sequence: an extraction well, a condenser, a gas-liquid separation device, a vacuum pump, an exhaust gas treatment system, and a discharge pipeline;

[0019] The negative pressure extraction system further includes a wastewater treatment system which is connected to the liquid outlet of the gas-liquid separation device.

[0020] Furthermore, the wind power generation device includes a tower barrel,

[0021] The condenser, gas-liquid separation device, vacuum pump, waste gas treatment system, and waste water treatment system are arranged inside the tower barrel, and the discharge pipe is arranged at the upper part of the tower barrel; the power supply module and the electricity storage module are also arranged inside the tower barrel.

[0022] Secondly, the present invention also provides a self-regulating remediation method for repairing soil and groundwater, which is executed by using the above-mentioned self-regulating remediation system for repairing soil and groundwater. The self-regulating remediation method includes:

[0023] Obtain the power generation amount Q per unit time of the wind power generation device in real time 1 , and the power generation amount Q per unit time of the solar energy device 3 ; in addition, obtain the electricity storage amount Q of the electricity storage module in real time 3 ,

[0024] Set the power of the aeration system to Q 气 , calculate the difference between the electricity storage amount Q 3 and Q 气 , and denote it as Q 4 ;

[0025] Set the first determination value and the second determination value of the electricity storage amount, and the first determination value is less than the second determination value;

[0026] If Q 4 is greater than the second determination value, then start both the thermal desorption system and the negative pressure extraction system;

[0027] If Q 4 is between the first determination value and the second determination value, then judge the magnitudes of Q 1 and Q 2 ;

[0028] If Q 1 + Q 2 is less than the third determination value, then start the thermal desorption system and stop the negative pressure extraction system;

[0029] If Q 1 + Q 2 is greater than or equal to the third determination value, then start both the thermal desorption system and the negative pressure extraction system;

[0030] If Q 4 is less than the first determination value, then stop the thermal desorption system and start the negative pressure extraction system.

[0031] Furthermore, when both the thermal desorption system and the negative pressure extraction system are started, obtain the difference ΔQ between the current electricity storage amount and the electricity storage amount monitored last time. If the difference ΔQ > Q 1 + Q 2 , then increase the working power of the thermal desorption system and the negative pressure extraction system.

[0032] Furthermore, let the power increment of the thermal desorption system be ΔW 1 , then:

[0033]

[0034] where d is the diameter of the heating well; μ is the sum of the concentrations of volatile pollutants and semi-volatile pollutants obtained in real time in the soil; T i is the current soil temperature obtained in real time, and T i-1 is the previous soil temperature obtained in real time; A is a coefficient related to the installation of the heating well.

[0035] Furthermore, set the upper limit value of the soil temperature to T max , such as when the difference ΔT between T max and the current soil temperature T i exceeds the temperature difference threshold, the heating power of the thermal desorption system is constant; the calculation method of the temperature threshold is:

[0036] T 0 = a(T i - T i-1 )

[0037] where T 0 is the temperature threshold, and a is a constant, taking a value between 0.5 and 0.8.

[0038] Furthermore, let the power increment of the negative pressure extraction system be ΔW 2 , then:

[0039]

[0040] where P i is the current vacuum degree in the extraction well obtained in real time, and P i-1 is the previous vacuum degree in the extraction well obtained in real time; B is a coefficient related to the installation of the extraction well.

[0041] Furthermore, if the difference ΔQ < Q 1 + Q 2 , then reduce the working power of the thermal desorption system, and when the current pollutant concentration μ in the soil is less than the concentration threshold, stop the thermal desorption system.

[0042] Further, when the thermal desorption system is started and the negative pressure extraction system is stopped, obtain the current pollutant concentration μ in the soil. If μ exceeds the concentration threshold, then start the negative pressure extraction system.

[0043] Further, when the thermal desorption system is stopped and the negative pressure extraction system is started, obtain the current soil temperature T i and the current pollutant concentration μ in the soil. If the soil temperature Ti When the temperature is lower than the lower limit and μ is lower than the concentration lower limit, the thermal desorption system is started.

[0044] Furthermore, an exhaust gas monitoring sensor is provided on the connecting pipeline between the vacuum pump and the exhaust gas treatment system for monitoring the pollutant concentration in the exhaust gas, denoted as μ. f In addition, a judgment value μ of the pollutant concentration in the exhaust gas is set. 1 and μ 2 and μ 1 < μ 2 ;

[0045] When μ f > μ 2 , the working power of the negative pressure extraction system is increased, and the working power of the thermal desorption system remains unchanged;

[0046] When μ 2 ≥ μ f > μ 1 , the working powers of both the negative pressure extraction system and the thermal desorption system remain unchanged;

[0047] When μ f ≤ μ 1 , the working power of the negative pressure extraction system remains unchanged, and the working power of the thermal desorption system is increased.

[0048] Furthermore, the determination methods of the judgment values μ 1 and μ 2 are as follows:

[0049] Obtain the types of volatile organic compounds and semi-volatile organic compounds in the soil. According to the obtained pollutant types, obtain the discharge standard concentration value θ corresponding to each pollutant. i ,

[0050]

[0051] μ 2 = bμ 1

[0052] where N represents the total number of types of volatile organic compounds and semi-volatile organic compounds in the obtained soil, δ is the soil moisture content; b is a constant, taking any number between 1.1 and 1.3.

[0053] Compared with the prior art, the present invention has the following beneficial effects:

[0054] The self-regulating remediation system and remediation method for soil and groundwater provided by the present invention use wind power generation equipment and solar power generation equipment to provide energy, can remediate soil and groundwater without using electric energy, and save energy. In addition, by using two energy supply methods, high-power remediation equipment can be used to improve the remediation efficiency. Moreover, according to the electricity storage situation and power generation situation, the remediation method is automatically adjusted to avoid energy waste and further improve the remediation efficiency and shorten the remediation time.

[0055] The present invention also adjusts the working power of the thermal desorption system and the negative pressure extraction system by real-time monitoring of the parameters in the soil, so as to avoid energy waste caused by the constant power of the remediation equipment during the continuous change of the parameters in the soil; in addition, according to the real-time monitored soil parameters, the remediation method and remediation intensity are timely adjusted to improve the remediation efficiency and speed up the completion of the remediation. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a schematic structural diagram of the remediation system provided by the present invention.

[0057] Figure 2 It is a connection block diagram of the negative pressure extraction system provided by the present invention.

[0058] Description of the reference numerals:

[0059] 1. Heating well, 2. Extraction well, 3. Wind power generation equipment, 4. Solar power generation equipment, 5. Injection well. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0060] The technical solutions of the present invention will be clearly described below in conjunction with the description of the drawings. Obviously, the described embodiments are not all embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0061] It should be noted that unless otherwise specifically stated, the relative arrangements of the components and steps described in these embodiments and the numerical expressions should not be construed as limiting the scope of the present invention.

[0062] The following description of the exemplary embodiments is merely illustrative and in no way limits the present invention and its application or use. Technologies, methods, and devices known to those of ordinary skill in the relevant fields may not be discussed in detail here, but when applicable, these technologies, methods, and devices should be regarded as part of this specification.

[0063] Embodiment 1

[0064] This embodiment provides a self-regulating remediation system for soil and groundwater, asFigure 1 and Figure 2 as shown in, including:

[0065] A thermal desorption system for heating the soil;

[0066] A negative pressure extraction system for realizing negative pressure extraction and remediation of the soil;

[0067] An aeration system for realizing air injection and remediation of the groundwater;

[0068] An energy supply system for supplying electric energy to the thermal desorption system, the negative pressure extraction system and the aeration system;

[0069] The energy supply system includes a wind power generation device 3, a solar power generation device 4, a power supply module and a power storage module; the wind power generation device 3 is connected to the power supply module and also to the power storage module; the solar power generation device 4 is connected to the power supply module and also to the power storage module;

[0070] The power supply module is connected to the thermal desorption system, the negative pressure extraction system and the aeration system;

[0071] According to the power generation amount per unit time of the wind power generation device, the power generation amount per unit time of the solar device and the power storage amount of the power storage module, the activation and deactivation of the thermal desorption system and the negative pressure extraction system are adjusted.

[0072] The thermal desorption system inputs heat energy into the ground, heats the soil and the groundwater, increases the vapor pressure and solubility of the target pollutants, promotes the volatilization or dissolution of the pollutants, and realizes the removal of the target pollutants through the negative pressure extraction system.

[0073] The negative pressure extraction technology applies a vacuum to the soil, forcing the contaminated gas in the unsaturated soil to flow in a controlled manner, thereby removing the volatile and semi-volatile organic pollutants therein. Since the groundwater layer is below the soil layer, the groundwater is also heated during the process of heating the soil, and the pollutants in the groundwater can also be volatilized, and the volatile pollutants and semi-volatile pollutants in the groundwater can also be removed through the extraction system, thereby remediating the groundwater.

[0074] The aeration system injects a certain volume of compressed air into the aquifer, and removes the pollutants through stripping, volatilization, dissolution and other effects.

[0075] Among them, as Figure 1 shown, the thermal desorption system includes a heating well 1, the heating well 1 is vertically inserted into the soil, and the power supply module supplies electric energy to the heating well 1. The heating well 1 is an electric heating well, and the electric heating well includes a metal pipe sealed at the bottom, and an electric heating element is arranged inside the metal pipe.

[0076] As Figure 2As shown, the negative pressure extraction system includes, connected in sequence: an extraction well 2, a condenser, a gas-liquid separation device, a vacuum pump, an exhaust gas treatment system, and an exhaust pipe; the negative pressure extraction system further includes a wastewater treatment system, and the wastewater treatment system is connected to the liquid outlet of the gas-liquid separation device.

[0077] Among them, the positions of the extraction well 2 and the heating well 1 in the figure are only for illustration. In fact, the extraction well 2 and the heating well 1 can be set to multiple, and the heating well 1 and the extraction well 2 can also be arranged at intervals alternately, or the heating wells can be arranged in a circular array, and the extraction well 2 is arranged at the center of the circular array of the heating well 1, etc.

[0078] In addition, the aeration system includes an air injection well 5. The air injection well 5 is vertically inserted into the aquifer below the soil, and compressed air is introduced into the water layer. The compressed air promotes the volatilization of volatile organic compounds in the water and is extracted through the extraction.

[0079] The wind power generation device includes a tower barrel. The top of the tower barrel has blades. The wind pushes the blades to rotate to achieve the conversion and collection of wind energy and electrical energy. The condenser, the gas-liquid separation device, the vacuum pump, the exhaust gas treatment system, and the wastewater treatment system are arranged inside the tower barrel, and the exhaust pipe is arranged at the upper part of the tower barrel; the power supply module and the electricity storage module are also arranged inside the tower barrel.

[0080] Embodiment 2

[0081] This embodiment provides a self-regulating repair method for soil and groundwater, which is executed by a self-regulating repair system for soil and groundwater provided in Embodiment 1. The self-regulating repair method includes:

[0082] Obtain the power generation amount Q per unit time of the wind power generation device in real time 1 , and the power generation amount Q per unit time of the solar energy device 2 ; in addition, obtain the stored electricity amount Q of the electricity storage module in real time 3 ,

[0083] Set the power of the aeration system to Q 气 , calculate the difference between the stored electricity amount Q 3 and Q 气 , and denote it as Q 4 ; the power of the aeration system remains unchanged during the repair process.

[0084] Set the first determination value and the second determination value of the stored electricity amount, where the first determination value is less than the second determination value;

[0085] If Q 4 is greater than the second determination value, then both the thermal desorption system and the negative pressure extraction system are started;

[0086] If Q 4If it is between the first determination value and the second determination value, then judge Q 1 and Q 2 for their magnitudes;

[0087] If Q 1 +Q 2 is less than the third determination value, then start the thermal desorption system and stop the negative pressure extraction system;

[0088] If Q 1 +Q 2 is greater than or equal to the third determination value, then start both the thermal desorption system and the negative pressure extraction system;

[0089] If Q 4 is less than the first determination value, then stop the thermal desorption system and start the negative pressure extraction system.

[0090] Among them, the first determination value and the second determination value are determined according to the working power of the thermal desorption system and the negative pressure extraction system. The working power of the thermal desorption system is determined according to the target temperature of the soil, and the working power of the negative pressure extraction system is determined according to the pollutant concentration and soil parameters; Usually, the working power of the thermal desorption system and the negative pressure extraction system can be adjusted within a certain range to continuously adapt to the changes in the pollutant concentration and other parameters in the soil. After the initial working power of the thermal desorption system and the negative pressure extraction system is set, the first determination value and the second determination value are determined according to the initial working power of the thermal desorption system and the negative pressure extraction system. Set the required electricity for meeting the initial working power of the thermal desorption system and the negative pressure extraction system as the critical electricity. Usually, the first determination value can be set to 0.7 - 0.8 times of the critical electricity, and the second determination value can be set to 1.2 - 1.4 times of the critical electricity. The third determination value can be set to 0.2 - 0.3 times.

[0091] When both the thermal desorption system and the negative pressure extraction system are started, obtain the difference ΔQ between the current stored electricity and the previously monitored stored electricity. If the difference ΔQ > Q 1 +Q 2 , then increase the working power of the thermal desorption system and the negative pressure extraction system.

[0092] Let the power increase value of the thermal desorption system be ΔW 1 , with the unit of W, then:

[0093]

[0094] Among them, d is the diameter of the heating well, with the unit of cm; μ is the sum of the concentrations of volatile pollutants and semi-volatile pollutants obtained in real time in the soil, with the unit of mg / kg; T i is the current soil temperature obtained in real time, with the unit of °C, T i-1 is the previous soil temperature obtained in real time; A is the coefficient related to the installation of the heating well.

[0095] A is related to the installation depth and spacing of the heating wells. If the installation depth is less than 10 m and the spacing is less than 5 m, the value of A is 0.5 - 0.8;

[0096] If the installation depth is greater than 15 m and the spacing is greater than 10 m, the value of A is 1.5 - 2;

[0097] In other cases, the value of A is 1 - 1.2.

[0098] Set the upper limit value of the soil temperature as T max , such as T max When the difference ΔT between the current soil temperature T i exceeds the temperature difference threshold, the heating power of the thermal desorption system is constant; the calculation method of the temperature threshold is:

[0099] T 0 = a(T i - T i-1 )

[0100] Among them, T 0 is the temperature threshold, a is a constant, and the value is a number between 0.5 - 0.8.

[0101] Let the power increase value of the negative pressure extraction system be ΔW 2 , then:

[0102]

[0103] Among them, P i is the current vacuum degree in the extraction well obtained in real time, P i-1 is the previous vacuum degree in the extraction well obtained in real time; B is a coefficient related to the installation of the extraction well.

[0104] B is related to the installation depth and spacing of the extraction well. If the installation depth is less than 10 m and the spacing is less than 10 m, the value of B is 0.25 - 0.4;

[0105] If the installation depth is greater than 20 m and the spacing is greater than 15 m, the value of B is 0.8 - 0.9;

[0106] In other cases, the value of B is 0.5 - 0.6.

[0107] If the difference ΔQ < Q 1 + Q 2 , then reduce the working power of the thermal desorption system. When the current pollutant concentration μ in the soil is less than the concentration threshold, stop the thermal desorption system. The concentration threshold is determined according to the soil compliance requirements, for example, set as 0.9 - 0.95 times of the remediation target value.

[0108] When the thermal desorption system is started and the negative pressure extraction system is stopped, obtain the current pollutant concentration μ in the soil. If μ exceeds the concentration threshold, start the negative pressure extraction system.

[0109] When the thermal desorption system is stopped and the negative pressure extraction system is started, obtain the current soil temperature T i and the current pollutant concentration μ in the soil. If the soil temperature T i is lower than the lower temperature limit and μ is less than the lower concentration limit, start the thermal desorption system. The lower temperature limit is the lower limit of the temperature required for soil remediation, and the lower concentration limit is the soil remediation target value.

[0110] Install an exhaust gas monitoring sensor on the connecting pipeline between the vacuum pump and the exhaust gas treatment system to monitor the pollutant concentration in the exhaust gas, denoted as μ f , and additionally set a judgment value μ 1 and μ 2 , and μ 1 < μ 2 ;

[0111] When μ f > μ 2 , increase the working power of the negative pressure extraction system, and keep the working power of the thermal desorption system unchanged;

[0112] When μ 2 ≥ μ f > μ 1 , both the working power of the negative pressure extraction system and the working power of the thermal desorption system remain unchanged;

[0113] When μ f ≤ μ 1 , keep the working power of the negative pressure extraction system unchanged and increase the working power of the thermal desorption system.

[0114] Among them, the determination method of the judgment values μ 1 and μ 2 is as follows:

[0115] Obtain the types of volatile organic compounds and semi-volatile organic compounds in the soil. According to the obtained pollutant types, obtain the discharge standard concentration value θ corresponding to each pollutant i ,

[0116]

[0117] μ 2 = bμ 1

[0118] Among them, N represents the total number of types of volatile organic compounds and semi-volatile organic compounds in the obtained soil, δ is the soil moisture content; b is a constant, taking any number between 1.1 and 1.3.

[0119] By collecting parameters such as the concentration of pollutants in the soil and the vacuum degree of the negative pressure extraction system in real time, the present invention adjusts the remediation plan and remediation parameters in real time, avoiding unnecessary over-remediation that causes energy waste, and also avoiding excessive remediation time caused by untimely remediation, shortening the remediation cycle and saving the remediation cost.

[0120] The above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A self-regulating remediation system for soil and groundwater remediation, characterized in that: include: Thermal desorption system, used to heat the soil; Negative pressure extraction system, used to achieve negative pressure extraction and repair of soil; Aeration system, used to achieve gas injection remediation of groundwater; An energy supply system, used to provide electrical energy for the thermal desorption system, the negative pressure extraction system and the aeration system; The energy supply system includes a wind power generation device, a solar power generation device, a power supply module and a power storage module; the wind power generation device is connected to the power supply module and also to the power storage module; the solar power generation device is connected to the power supply module and also to the power storage module; The power supply module is connected to the thermal desorption system, the negative pressure extraction system and the aeration system; The activation and deactivation of the thermal desorption system and the negative pressure extraction system are adjusted according to the power generation per unit time of the wind power generation equipment, the power generation per unit time of the solar power equipment and the storage capacity of the power storage module.

2. The self-adjusting repair system according to claim 1, characterized in that: The thermal desorption system comprises a heating well, which is vertically inserted into the soil, and the power supply module provides electrical energy to the heating well.

3. The self-adjusting repair system according to claim 1, characterized in that: The negative pressure extraction system includes: an extraction well, a condenser, a gas-liquid separation device, a vacuum pump, an exhaust gas treatment system, and a discharge pipeline connected in sequence; The negative pressure extraction system also includes a wastewater treatment system, which is connected to the liquid outlet of the gas-liquid separation device.

4. The self-adjusting repair system according to claim 3, characterized in that: The wind power generation equipment comprises a tower, The condenser, gas-liquid separation equipment, vacuum pump, exhaust gas treatment system, and wastewater treatment system are arranged inside the tower, and the exhaust pipe is arranged on the upper part of the tower; the power supply module and the power storage module are also arranged inside the tower.

5. A self-regulating repair method for repairing soil and groundwater, which is performed by using a self-regulating repair system for repairing soil and groundwater according to any one of claims 3 or 4, characterized in that: The self-adjusting repair method comprises: The power generation per unit time Q1 of the wind power generation equipment and the power generation per unit time Q2 of the solar power equipment are obtained in real time; in addition, the storage capacity Q3 of the power storage module is obtained in real time. Set the aeration system power to Q 气 , calculate the storage capacity Q3 and Q 气 The difference is recorded as Q4; Setting a first determination value and a second determination value of the amount of power stored, the first determination value being smaller than the second determination value; If Q4 is greater than the second judgment value, both the thermal desorption system and the negative pressure extraction system are started; If Q4 is between the first determination value and the second determination value, the size of Q1 and Q2 is determined; If Q1+Q2 is less than the third judgment value, the thermal desorption system is started and the negative pressure extraction system is stopped; If Q1+Q2 is greater than or equal to the third judgment value, both the thermal desorption system and the negative pressure extraction system are started; If Q4 is less than the first judgment value, the thermal desorption system is stopped and the negative pressure extraction system is started.

6. The self-adjusting repair method according to claim 5, characterized in that: When both the thermal desorption system and the negative pressure extraction system are started, the difference ΔQ between the current storage capacity and the storage capacity monitored last time is obtained. If the difference ΔQ>Q1+Q2, the working power of the thermal desorption system and the negative pressure extraction system is increased.

7. The self-adjusting repair method according to claim 6, characterized in that: Assuming the power increase of the thermal desorption system is ΔW1, then: Where d is the diameter of the heating well; μ is the sum of the volatile pollutant concentration and semi-volatile pollutant concentration obtained in real time in the soil; T i is the current soil temperature obtained in real time, T i-1 is the previous soil temperature obtained in real time; A is the coefficient related to the heating well installation.

8. The self-adjusting repair method according to claim 7, characterized in that: Set the soil temperature upper limit to T max , such as T max With the current soil temperature T i When the difference ΔT exceeds the temperature difference threshold, the heating power of the thermal desorption system is constant; the temperature threshold is calculated as follows: T0=a(T i -T i-1 ) Wherein, T0 is the temperature threshold, and a is a constant, which takes a value between 0.5 and 0.

8.

9. The self-adjusting repair method according to claim 8, characterized in that The power increase of the negative pressure extraction system is ΔW2, then: Among them, P i is the current vacuum degree in the extraction well obtained in real time, P i-1 is the previous vacuum degree in the extraction well obtained in real time; B is the coefficient related to the installation of the extraction well.

10. The self-adjusting repair method according to claim 9, characterized in that: If the difference ΔQ<Q1+Q2, the working power of the thermal desorption system is reduced. When the current pollutant concentration μ in the soil is less than the concentration threshold, the thermal desorption system is disabled.

11. The self-adjusting repair method according to claim 5, characterized in that: When the thermal desorption system is started and the negative pressure extraction system is stopped, the current pollutant concentration μ in the soil is obtained. If μ exceeds the concentration threshold, the negative pressure extraction system is started.

12. The self-adjusting repair method according to claim 5, characterized in that: When the thermal desorption system is disabled and the negative pressure extraction system is activated, the current soil temperature T i And the current pollutant concentration μ in the soil, if the soil temperature T i When the temperature is lower than the lower limit and μ is less than the lower limit of concentration, the thermal desorption system is started.

13. The self-adjusting repair method according to claim 5, characterized in that: An exhaust gas monitoring sensor is installed on the connecting pipeline between the vacuum pump and the exhaust gas treatment system to monitor the pollutant concentration in the exhaust gas, which is set as μ f , and set the judgment values ​​μ1 and μ2 of the pollutant concentration in the exhaust gas, and μ1<μ2; When μ f When >μ2, the working power of the negative pressure extraction system is increased, and the working power of the thermal desorption system remains unchanged; When μ2 ≥ μ f When >μ1, the working power of the negative pressure extraction system and the working power of the thermal desorption system remain unchanged; When μ f When ≤μ1, the working power of the negative pressure extraction system remains unchanged, and the working power of the thermal desorption system is increased.

14. The self-adjusting repair method according to claim 13, characterized in that: The determination method of the judgment values ​​μ1 and μ2 is: Obtain the types of volatile organic compounds and semi-volatile organic compounds in the soil, and obtain the emission standard concentration value θ corresponding to each pollutant according to the obtained pollutant types i , μ2=bμ1 Where N represents the total number of volatile organic compounds and semi-volatile organic compounds in the soil, δ is the soil moisture content, and b is a constant, which can be any number between 1.1 and 1.3.

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