CN114570759B - Soil restoration control method and system for heat-assisted in-situ chemical oxidation - Google Patents
Soil restoration control method and system for heat-assisted in-situ chemical oxidation Download PDFInfo
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- CN114570759B CN114570759B CN202210221243.2A CN202210221243A CN114570759B CN 114570759 B CN114570759 B CN 114570759B CN 202210221243 A CN202210221243 A CN 202210221243A CN 114570759 B CN114570759 B CN 114570759B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses a soil restoration control method and system for heat-assisted in-situ chemical oxidation, comprising the following steps: acquiring soil characteristics and organic pollutant characteristics of an area to be repaired, and determining distribution information of a heat-assisted in-situ chemical oxidation heating well; obtaining the depth information of the polluted soil in the area to be repaired, and pumping quantitative magnetic oxidant into the polluted soil layer through hydraulic pressure according to the depth information of the polluted soil; generating a magnetic field at a target depth position through a high-frequency magnetic field generator, wherein the magnetic field generates an eddy current effect to heat a magnetic oxidant to perform chemical oxidation reaction with pollutants, so as to repair the polluted soil; temperature information and pollutant concentration information in the chemical oxidation reaction are obtained through a monitoring system, and the temperature information is controlled and the magnetic field generator is started and stopped according to the pollutant concentration information. The invention increases the reaction rate of the chemical oxidant in the soil by heating, is favorable for fully oxidizing the organic pollutants in the soil, and has obvious repairing effect.
Description
Technical Field
The invention relates to the technical field of soil remediation, in particular to a soil remediation control method and system for heat-assisted in-situ chemical oxidation.
Background
In recent years, with the adjustment of industrial structures, huge pressure is caused on environmental remediation by contaminated sites left after industrial enterprises move or shut down. The soil in the polluted site contains a large amount of organic pollutants such as Polycyclic Aromatic Hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and the like, the organic pollutants can also be transmitted through other environmental media, and the pollutants in the soil generally have concealment, hysteresis and accumulation, so that the repair of the organic polluted soil is urgent.
The organic pollution restoration of soil is mainly divided into three categories of physical restoration, biological restoration and chemical restoration. The chemical oxidation technology belongs to one of the soil chemical restoration technologies, and is to add chemical oxidant into the soil to oxidize and degrade macromolecular organic pollutants in the soil into inorganic small molecules with low toxicity or no toxicity so as to restore the soil. The manner in which the chemical oxidizing agent is applied to the subsurface soil and the effective contact reaction of the chemical oxidizing agent with the contaminated soil is a difficulty in chemical oxidation techniques.
The reaction rate of the chemical oxidation reaction in the heated soil can be increased, and the soil can promote the analysis of organic pollutants in the soil after being heated, so that the soil restoration efficiency and effect are improved. Therefore, the soil is heated to assist the chemical oxidation technology, so that the defects of the prior art can be overcome, the repair efficiency is improved, and the method has remarkable repair effect on organic pollutants which are difficult to volatilize and oxidize in underground soil and underground water in an industrial pollution site.
Disclosure of Invention
In order to solve the technical problems, the invention provides a soil restoration control method and a soil restoration control system for heat-assisted in-situ chemical oxidation.
The first aspect of the invention provides a soil remediation control method for thermally assisted in-situ chemical oxidation, comprising:
acquiring soil characteristics and organic pollutant characteristics of a region to be repaired, and generating heat-assisted in-situ chemical oxidation heating well distribution information according to the soil characteristics and the organic pollutant characteristics;
obtaining the depth information of the polluted soil of the area to be repaired, and pumping quantitative magnetic oxidant into the polluted soil layer through a hydraulic pressure pump according to the depth information of the polluted soil;
placing a high-frequency strong magnetic field generator at a corresponding position of the heating well according to the depth information of the polluted soil;
Generating a magnetic field at a target depth position through the high-frequency magnetic field generator, wherein the magnetic field generates an eddy current effect to heat a magnetic oxidant to perform chemical oxidation reaction with pollutants, so as to repair the polluted soil;
temperature information and pollutant concentration information in the chemical oxidation reaction are obtained through a monitoring system, and temperature information control and starting and stopping of a magnetic field generator are carried out according to the pollutant concentration information.
In this scheme, obtain soil characteristic and organic pollutant characteristic of waiting to repair regional, according to soil characteristic and organic pollutant characteristic generate heat auxiliary in situ chemical oxidation heating well distribution information, specifically do:
acquiring the water content and the heat conductivity of the soil of the area to be repaired according to the soil characteristics of the area to be repaired, and acquiring the chemical oxidation reaction rate of the organic pollutants according to the organic pollutant characteristics of the area to be repaired;
determining thermal-assisted in-situ chemical oxidation heating well spacing information through the water content, the thermal conductivity and the chemical oxidation reaction rate of the soil;
and acquiring distribution information of the heat-assisted in-situ chemical oxidation heating wells according to regular triangle or regular hexagon arrangement according to the interval information of the heating wells.
In this scheme, according to pollute soil depth information with quantitative magnetism oxidant pump through hydraulic pressure pump in the contaminated soil layer, specifically:
determining a target depth position according to the polluted soil depth information, and performing hydraulic fracturing on the target depth position by a hydraulic pressure pump to generate cracks;
and pressing a quantitative amount of magnetic oxidant into the fracture as fracture propping agent, so that the fracture is uniformly filled with the magnetic oxidant.
In this scheme, through high frequency magnetic field generator generates the magnetic field in target depth position, the magnetic field produce the electric vortex effect heat magnetic oxidant go on with the chemical oxidation reaction of pollutant, restore the contaminated soil, specifically do:
a high-frequency alternating magnetic field is generated by a high-frequency magnetic field generator, and a magnetic oxidant in polluted soil generates heat due to an eddy current effect;
obtaining the separation temperature of the organic pollutants and the soil according to the organic pollutant characteristics of the area to be repaired through big data analysis;
acquiring a change rule of a chemical oxidation reaction rate of the organic pollutants in the area to be repaired along with the temperature, and acquiring a target heating temperature based on the separation temperature through the change rule;
And heating the polluted soil according to the target heating temperature.
In this scheme, acquire temperature information and pollutant concentration information in the chemical oxidation reaction through monitoring system, carry out temperature information's control and magnetic field generator's start-stop according to pollutant concentration information, specifically do:
acquiring temperature information and pollutant concentration information of a chemical oxidation reaction at a target depth position, presetting a pollutant concentration threshold value, and calculating deviation information of the pollutant concentration information and the pollutant concentration threshold value;
presetting a deviation threshold, judging whether the deviation information is larger than a deviation rate threshold, if so, adjusting the target heating temperature of the target depth position, and simultaneously acquiring the oxidant concentration information of the target depth position;
if the oxidant concentration information is smaller than a preset oxidant concentration threshold value, the monitoring system automatically cuts off the power of the magnetic field generator, and puts quantitative magnetic oxidant into soil, so that the oxidant concentration meets a preset oxidant concentration range, and then the magnetic field generator is started;
and when the deviation information is smaller than the deviation threshold value, the pollutant concentration reaches the safety standard, the monitoring system closes the magnetic field generator, stops the feeding of the oxidant, and completes the soil restoration of the area to be restored.
In the invention, the method further comprises the following steps:
the method comprises the steps of obtaining pollutant concentration information before restoration of an area to be restored through a monitoring system, and generating first estimated restoration time according to the area information of the area to be restored, the organic pollutant concentration information and the chemical oxidation reaction rate;
generating a pollutant concentration time sequence according to the pollutant concentration information in the repairing process according to the time sequence, and generating a pollutant concentration change curve through the pollutant concentration time sequence;
acquiring pollutant concentration information at a preset time point according to the pollutant concentration change curve, and generating a second estimated repair time according to the pollutant concentration information at the preset time point and the change trend of the concentration change curve;
comparing the first estimated repair time with the second estimated repair time to generate time deviation, and if the time deviation is larger than a preset deviation threshold value, generating correction information;
and heating the polluted soil according to the target heating temperature.
The second aspect of the present invention also provides a soil remediation control system for thermally assisted in situ chemical oxidation, the system comprising: the device comprises a memory and a processor, wherein the memory comprises a soil restoration control method program of heat-assisted in-situ chemical oxidation, and the method program of the soil restoration control of the heat-assisted in-situ chemical oxidation realizes the following steps when being executed by the processor:
Acquiring soil characteristics and organic pollutant characteristics of a region to be repaired, and generating heat-assisted in-situ chemical oxidation heating well distribution information according to the soil characteristics and the organic pollutant characteristics;
obtaining the depth information of the polluted soil of the area to be repaired, and pumping quantitative magnetic oxidant into the polluted soil layer through a hydraulic pressure pump according to the depth information of the polluted soil;
placing a high-frequency strong magnetic field generator at a corresponding position of the heating well according to the depth information of the polluted soil;
generating a magnetic field at a target depth position through the high-frequency magnetic field generator, wherein the magnetic field generates an eddy current effect to heat a magnetic oxidant to perform chemical oxidation reaction with pollutants, so as to repair the polluted soil;
temperature information and pollutant concentration information in the chemical oxidation reaction are obtained through a monitoring system, and temperature information control and starting and stopping of a magnetic field generator are carried out according to the pollutant concentration information.
In this scheme, obtain soil characteristic and organic pollutant characteristic of waiting to repair regional, according to soil characteristic and organic pollutant characteristic generate heat auxiliary in situ chemical oxidation heating well distribution information, specifically do:
acquiring the water content and the heat conductivity of the soil of the area to be repaired according to the soil characteristics of the area to be repaired, and acquiring the chemical oxidation reaction rate of the organic pollutants according to the organic pollutant characteristics of the area to be repaired;
Determining thermal-assisted in-situ chemical oxidation heating well spacing information through the water content, the thermal conductivity and the chemical oxidation reaction rate of the soil;
and acquiring distribution information of the heat-assisted in-situ chemical oxidation heating wells according to regular triangle or regular hexagon arrangement according to the interval information of the heating wells.
In this scheme, according to pollute soil depth information with quantitative magnetism oxidant pump through hydraulic pressure pump in the contaminated soil layer, specifically:
determining a target depth position according to the polluted soil depth information, and performing hydraulic fracturing on the target depth position by a hydraulic pressure pump to generate cracks;
and pressing a quantitative amount of magnetic oxidant into the fracture as fracture propping agent, so that the fracture is uniformly filled with the magnetic oxidant.
In this scheme, through high frequency magnetic field generator generates the magnetic field in target depth position, the magnetic field produce the electric vortex effect heat magnetic oxidant go on with the chemical oxidation reaction of pollutant, restore the contaminated soil, specifically do:
a high-frequency alternating magnetic field is generated by a high-frequency magnetic field generator, and a magnetic oxidant in polluted soil generates heat due to an eddy current effect;
Obtaining the separation temperature of the organic pollutants and the soil according to the organic pollutant characteristics of the area to be repaired through big data analysis;
acquiring a change rule of a chemical oxidation reaction rate of the organic pollutants in the area to be repaired along with the temperature, and acquiring a target heating temperature based on the separation temperature through the change rule;
and heating the polluted soil according to the target heating temperature.
In this scheme, acquire temperature information and pollutant concentration information in the chemical oxidation reaction through monitoring system, carry out temperature information's control and magnetic field generator's start-stop according to pollutant concentration information, specifically do:
acquiring temperature information and pollutant concentration information of a chemical oxidation reaction at a target depth position, presetting a pollutant concentration threshold value, and calculating deviation information of the pollutant concentration information and the pollutant concentration threshold value;
presetting a deviation threshold, judging whether the deviation information is larger than a deviation rate threshold, if so, adjusting the target heating temperature of the target depth position, and simultaneously acquiring the oxidant concentration information of the target depth position;
if the oxidant concentration information is smaller than a preset oxidant concentration threshold value, the monitoring system automatically cuts off the power of the magnetic field generator, and puts quantitative magnetic oxidant into soil, so that the oxidant concentration meets a preset oxidant concentration range, and then the magnetic field generator is started;
And when the deviation information is smaller than the deviation threshold value, the pollutant concentration reaches the safety standard, the monitoring system closes the magnetic field generator, stops the feeding of the oxidant, and completes the soil restoration of the area to be restored.
In the invention, the method further comprises the following steps:
the method comprises the steps of obtaining pollutant concentration information before restoration of an area to be restored through a monitoring system, and generating first estimated restoration time according to the area information of the area to be restored, the organic pollutant concentration information and the chemical oxidation reaction rate;
generating a pollutant concentration time sequence according to the pollutant concentration information in the repairing process according to the time sequence, and generating a pollutant concentration change curve through the pollutant concentration time sequence;
acquiring pollutant concentration information at a preset time point according to the pollutant concentration change curve, and generating a second estimated repair time according to the pollutant concentration information at the preset time point and the change trend of the concentration change curve;
comparing the first estimated repair time with the second estimated repair time to generate time deviation, and if the time deviation is larger than a preset deviation threshold value, generating correction information;
and heating the polluted soil according to the target heating temperature.
The invention discloses a soil restoration control method and system for heat-assisted in-situ chemical oxidation, comprising the following steps: acquiring soil characteristics and organic pollutant characteristics of a region to be repaired, and generating heat-assisted in-situ chemical oxidation heating well distribution information according to the soil characteristics and the organic pollutant characteristics; obtaining the depth information of the polluted soil of the area to be repaired, and pumping quantitative magnetic oxidant into the polluted soil layer through a hydraulic pressure pump according to the depth information of the polluted soil; placing a high-frequency strong magnetic field generator at a corresponding position of the heating well according to the depth information of the polluted soil; generating a magnetic field at a target depth position through the high-frequency magnetic field generator, wherein the magnetic field generates an eddy current effect to heat a magnetic oxidant to perform chemical oxidation reaction with pollutants, so as to repair the polluted soil; temperature information and pollutant concentration information in the chemical oxidation reaction are obtained through a monitoring system, and temperature information control and starting and stopping of a magnetic field generator are carried out according to the pollutant concentration information.
The invention combines the thought of high-efficiency utilization of heating technology in physical repair based on the advantages of chemical oxidation technology, and designs that magnetic oxidant particles generate an eddy current effect in an alternating electromagnetic field, and released heat is used as a heat source to heat polluted soil, thereby not only promoting the release of pollutants in the soil, but also improving the chemical oxidation reaction rate. Meanwhile, the magnetic oxidant particles are made of elements which are contained in a large amount in the soil, and secondary pollution to the soil can not be caused in the soil remediation process. The magnetic oxidizer particles have a particle size of less than 1mm and are conducive to adequate dispersion in the soil. In the invention, the starting and stopping of the magnetic field generator, the display and transmission of the monitoring data of the generator, and the monitoring of the temperature of soil, the concentration of oxidant and the concentration of pollutants in the whole reaction process are all completed by the monitoring system, thereby realizing the automatic control of the device and greatly saving the labor cost.
Drawings
FIG. 1 illustrates a flow chart of a soil remediation control method of the present invention for thermally assisted in situ chemical oxidation;
FIG. 2 is a flow chart of a method of the present invention for temperature information control and start-stop of a magnetic field generator based on contaminant concentration information;
FIG. 3 illustrates a block diagram of a soil remediation control system of the present invention that assists in the in situ chemical oxidation;
FIG. 4 shows a schematic of a soil remediation system of the present invention thermally assisted in situ chemical oxidation.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
FIG. 1 shows a flow chart of a soil remediation control method of the present invention for thermally assisted in situ chemical oxidation.
As shown in fig. 1, a first aspect of the present invention provides a soil remediation control method of heat-assisted in-situ chemical oxidation, comprising:
s102, acquiring soil characteristics and organic pollutant characteristics of a region to be repaired, and generating heat-assisted in-situ chemical oxidation heating well distribution information according to the soil characteristics and the organic pollutant characteristics;
s104, obtaining the depth information of the polluted soil in the area to be repaired, and pumping quantitative magnetic oxidant into the polluted soil layer through hydraulic pressure according to the depth information of the polluted soil;
s106, placing a high-frequency strong magnetic field generator at a corresponding position of the heating well according to the depth information of the polluted soil;
s108, generating a magnetic field at a target depth position through the high-frequency magnetic field generator, wherein the magnetic field generates an eddy current effect to heat a magnetic oxidant to perform chemical oxidation reaction with pollutants, so as to repair the polluted soil;
s110, acquiring temperature information and pollutant concentration information in the chemical oxidation reaction through a monitoring system, and controlling the temperature information and starting and stopping a magnetic field generator according to the pollutant concentration information.
The monitoring system comprises a monitoring well, a temperature sensor, a pollutant sampling monitoring borehole and a monitoring controller, the depth of the monitoring well is identical to that of the heating well, the monitoring system is used for acquiring the depth information of the polluted soil in the area to be repaired, the diameter of the monitoring well is suitable for being placed into the width of the temperature sensor and the width of the pollutant sampling monitoring borehole, and meanwhile, the monitoring system also comprises the display and transmission of monitoring data, and the temperature of the soil, the concentration information of the oxidant and the concentration information of the pollutant in the reaction process are displayed in a preset mode.
The method is characterized in that the soil characteristics and the organic pollutant characteristics of the to-be-repaired area are obtained, and the distribution information of the heat-assisted in-situ chemical oxidation heating well is generated according to the soil characteristics and the organic pollutant characteristics, specifically: acquiring the water content and the heat conductivity of the soil of the area to be repaired according to the soil characteristics of the area to be repaired, and acquiring the chemical oxidation reaction rate of the organic pollutants according to the organic pollutant characteristics of the area to be repaired; determining thermal-assisted in-situ chemical oxidation heating well spacing information through the water content, the thermal conductivity and the chemical oxidation reaction rate of the soil; and acquiring distribution information of the heat-assisted in-situ chemical oxidation heating wells according to the interval information of the heating wells, wherein the heat-assisted in-situ chemical oxidation heating wells are distributed in a regular triangle or regular hexagon mode, and meanwhile, the depth of the heating wells is 0.5m deeper than that of the pollutants, and the arrangement of the heating wells extends to the periphery of the to-be-repaired area by 0.5m-1m, so that the whole to-be-repaired area can be uniformly heated and oxidized by the oxidizing agent.
The method is characterized in that a quantitative magnetic oxidant is pumped into the polluted soil layer through a hydraulic pressure pump according to the depth information of the polluted soil, and specifically comprises the following steps: determining a target depth position according to the polluted soil depth information, and performing hydraulic fracturing on the target depth position by a hydraulic pressure pump to generate cracks; and pressing a quantitative amount of magnetic oxidant into the fracture as fracture propping agent, so that the fracture is uniformly filled with the magnetic oxidant. The magnetic oxidant adopts conductive oxidant particles, such as iron carbide particles, the particle size of the particles is less than 1mm, a magnetic closed conductor pressed into soil is in an alternating magnetic field, induced electromotive force can be generated in the conductor due to electromagnetic induction, the conductor has resistance, induced current can be generated in the conductor, the current is in a vortex shape, and the vortex can generate different heat according to the resistivity in the conductor. Meanwhile, the oxidation rate of the chemical oxidation reaction is increased along with the temperature rise in a certain range, and the heat generated by the electric vortex can assist the chemical oxidation reaction, so that the repair effect is improved.
The method is characterized in that a magnetic field is generated at a target depth position through the high-frequency magnetic field generator, the magnetic field generates an eddy current effect to heat a magnetic oxidant to perform chemical oxidation reaction with pollutants, and the polluted soil is restored, specifically: a high-frequency alternating magnetic field is generated by a high-frequency magnetic field generator, and a magnetic oxidant in polluted soil generates heat due to an eddy current effect; obtaining the separation temperature of the organic pollutants and the soil according to the organic pollutant characteristics of the area to be repaired through big data analysis; acquiring a change rule of a chemical oxidation reaction rate of the organic pollutants in the area to be repaired along with the temperature, and acquiring a target heating temperature based on the separation temperature through the change rule; and heating the polluted soil according to the target heating temperature.
Placing a high-frequency strong magnetic field generator at a target depth position in an injection well, and generating a high-frequency alternating strong magnetic field by the device after alternating current is introduced; at the moment, the magnetic oxidant in the polluted soil is heated due to the eddy current effect, so that the polluted soil is directly heated, the organic pollutants and the soil can be separated and exposed, and the contact area with the chemical oxidant is enlarged; meanwhile, the oxidation property of the magnetic oxidant is activated due to the fact that the soil is heated, the chemical oxidation reaction rate is improved, the repairing effect on organic pollutants which are difficult to volatilize and oxidize is enhanced, and the organic pollutants in the soil are degraded into inorganic small molecules with low toxicity or no toxicity.
According to the embodiment of the invention, the monitoring system acquires temperature information and pollutant concentration information in the chemical oxidation reaction, and controls the temperature information and starts and stops the magnetic field generator according to the pollutant concentration information, specifically:
s202, acquiring temperature information and pollutant concentration information of chemical oxidation reaction at a target depth position, presetting a pollutant concentration threshold value, and calculating deviation information of the pollutant concentration information and the pollutant concentration threshold value;
s204, presetting a deviation threshold, judging whether the deviation information is larger than a deviation rate threshold, if so, adjusting the target heating temperature of the target depth position, and simultaneously acquiring the oxidant concentration information of the target depth position;
s206, if the oxidant concentration information is smaller than a preset oxidant concentration threshold value, the monitoring system automatically cuts off the power of the magnetic field generator, and puts quantitative magnetic oxidant into soil, so that the oxidant concentration meets a preset oxidant concentration range, and then the magnetic field generator is started;
and S208, when the deviation information is smaller than a deviation threshold value, the pollutant concentration reaches a safety standard, the monitoring system closes the magnetic field generator, stops the feeding of the oxidant, and completes the soil restoration of the area to be restored.
When the concentration of the magnetic oxidant is reduced below a specified value and the concentration of the pollutant does not reach a safety standard, the monitoring system can automatically power off the magnetic field generator, the reaction device is suspended, the hydraulic pressure pump is controlled to put a quantitative oxidant into soil, the magnetic field generator is started, and the reaction process is continued; when the concentration of the pollutant reaches the safety standard, the monitoring system can automatically power off the generator and stop the feeding of the oxidant, and the reaction process is finished.
It should be noted that the present invention further includes correcting the chemical reaction oxidation process by estimating the repair time, specifically:
the method comprises the steps of obtaining pollutant concentration information before restoration of an area to be restored through a monitoring system, and generating first estimated restoration time according to the area information of the area to be restored, the organic pollutant concentration information and the chemical oxidation reaction rate;
generating a pollutant concentration time sequence according to the pollutant concentration information in the repairing process according to the time sequence, and generating a pollutant concentration change curve through the pollutant concentration time sequence;
acquiring pollutant concentration information at a preset time point according to the pollutant concentration change curve, and generating a second estimated repair time according to the pollutant concentration information at the preset time point and the change trend of the concentration change curve;
Comparing the first estimated repair time with the second estimated repair time to generate time deviation, and if the time deviation is larger than a preset deviation threshold value, generating correction information;
and heating the polluted soil according to the target heating temperature.
According to an embodiment of the present invention, the method for obtaining the organic pollutant concentration of the area to be repaired further includes:
dividing a region to be repaired into a plurality of sub-regions, acquiring soil characteristics and organic pollutant characteristics in each sub-region, and generating characteristic values of each sub-region according to the soil characteristics and the organic pollutant characteristics in each sub-region;
comparing the characteristic value deviation rate of each sub-region, and classifying the sub-region smaller than the characteristic value deviation rate as the similar region;
according to the arrangement interval and the arrangement mode of the heat-assisted in-situ chemical oxidation heating wells in the specific subarea, carrying out the arrangement of the heating wells in the similar areas in the area to be repaired;
meanwhile, the organic pollutant concentration information of the specific subarea is obtained according to the monitoring system, the organic pollutant concentration information of the same type of area is generated through the organic pollutant concentration information of the specific subarea, and the organic pollutant concentration of the area to be repaired is generated according to the organic pollutant concentration information of each subarea.
The method is characterized in that the area to be repaired is divided into different subareas, each subarea is operated independently, the operation speed is high, the independent operation results of each subarea are integrated to obtain an integral operation structure, the concentration of the organic pollutants in the area to be repaired and the concentration of the organic pollutants after repair are measured and calculated, and the measuring and calculating efficiency is improved.
According to the embodiment of the invention, the method further comprises the steps of constructing a database to obtain the data reference of the target area to be repaired, specifically:
constructing a database, and storing pollutant concentration and temperature change curves generated by an organic pollutant concentration time sequence in the history repairing process and heat-assisted in-situ chemical oxidation heating well distribution information into the database;
generating a characteristic tag according to the soil characteristics and the organic pollutant characteristics of the target to-be-repaired area, and establishing an index task in the database according to the characteristic tag;
judging the similarity comparison between the characteristic tag and the data in the database, and obtaining historical repair data, wherein the similarity between the soil characteristics of the target area to be repaired and the characteristics of the organic pollutants in the database meets the requirement of a preset value;
and extracting heat auxiliary target heating temperature information and magnetic oxidant feeding amount information according to the historical repair data to serve as data references of the target area to be repaired.
It should be noted that, for faster obtaining the repair parameters of the target to-be-repaired area, a database is established, which includes a pollutant concentration and temperature change curve generated by the organic pollutant concentration time sequence of each to-be-repaired area in the historical repair process and the distribution information of the thermal-assisted in-situ chemical oxidation heating well, and the similarity comparison is performed in the database according to the feature label of the target to-be-repaired area, wherein the similarity comparison can be Euclidean distance or cosine comparison, and historical repair data meeting the requirement of a preset value is searched in the database and is used as the data reference of the target to-be-repaired area, so that the efficiency of the whole repair process is improved.
The second aspect of the present invention also provides a soil remediation control system 3 for thermally assisted in situ chemical oxidation, the system comprising: a memory 31, a processor 32, wherein the memory includes a soil remediation control method program of heat-assisted in-situ chemical oxidation, and the soil remediation control method program of heat-assisted in-situ chemical oxidation realizes the following steps when executed by the processor:
acquiring soil characteristics and organic pollutant characteristics of a region to be repaired, and generating heat-assisted in-situ chemical oxidation heating well distribution information according to the soil characteristics and the organic pollutant characteristics;
Obtaining the depth information of the polluted soil of the area to be repaired, and pumping quantitative magnetic oxidant into the polluted soil layer through a hydraulic pressure pump according to the depth information of the polluted soil;
placing a high-frequency strong magnetic field generator at a corresponding position of the heating well according to the depth information of the polluted soil;
generating a magnetic field at a target depth position through the high-frequency magnetic field generator, wherein the magnetic field generates an eddy current effect to heat a magnetic oxidant to perform chemical oxidation reaction with pollutants, so as to repair the polluted soil;
temperature information and pollutant concentration information in the chemical oxidation reaction are obtained through a monitoring system, and temperature information control and starting and stopping of a magnetic field generator are carried out according to the pollutant concentration information.
The monitoring system comprises a monitoring well, a temperature sensor, a pollutant sampling monitoring borehole and a monitoring controller, the depth of the monitoring well is identical to that of the heating well, the monitoring system is used for acquiring the depth information of the polluted soil in the area to be repaired, the diameter of the monitoring well is suitable for being placed into the width of the temperature sensor and the width of the pollutant sampling monitoring borehole, and meanwhile, the monitoring system also comprises the display and transmission of monitoring data, and the temperature of the soil, the concentration information of the oxidant and the concentration information of the pollutant in the reaction process are displayed in a preset mode.
The method is characterized in that the soil characteristics and the organic pollutant characteristics of the to-be-repaired area are obtained, and the distribution information of the heat-assisted in-situ chemical oxidation heating well is generated according to the soil characteristics and the organic pollutant characteristics, specifically: acquiring the water content and the heat conductivity of the soil of the area to be repaired according to the soil characteristics of the area to be repaired, and acquiring the chemical oxidation reaction rate of the organic pollutants according to the organic pollutant characteristics of the area to be repaired; determining thermal-assisted in-situ chemical oxidation heating well spacing information through the water content, the thermal conductivity and the chemical oxidation reaction rate of the soil; and acquiring distribution information of the heat-assisted in-situ chemical oxidation heating wells according to the interval information of the heating wells, wherein the heat-assisted in-situ chemical oxidation heating wells are distributed in a regular triangle or regular hexagon mode, and meanwhile, the depth of the heating wells is 0.5m deeper than that of the pollutants, and the arrangement of the heating wells extends to the periphery of the to-be-repaired area by 0.5m-1m, so that the whole to-be-repaired area can be uniformly heated and oxidized by the oxidizing agent.
The method is characterized in that a quantitative magnetic oxidant is pumped into the polluted soil layer through a hydraulic pressure pump according to the depth information of the polluted soil, and specifically comprises the following steps: determining a target depth position according to the polluted soil depth information, and performing hydraulic fracturing on the target depth position by a hydraulic pressure pump to generate cracks; and pressing a quantitative amount of magnetic oxidant into the fracture as fracture propping agent, so that the fracture is uniformly filled with the magnetic oxidant. The magnetic oxidant adopts conductive oxidant particles, such as iron carbide particles, and the like, a magnetic closed conductor pressed into soil is in an alternating magnetic field, induced electromotive force can be generated in the conductor due to electromagnetic induction, the conductor has resistance, induced current can be generated in the conductor, the current is in a vortex shape, namely vortex flow, and the vortex flow can generate different heat according to the resistivity in the conductor. Meanwhile, the oxidation rate of the chemical oxidation reaction is increased along with the temperature rise in a certain range, and the heat generated by the electric vortex can assist the chemical oxidation reaction, so that the repair effect is improved.
The method is characterized in that a magnetic field is generated at a target depth position through the high-frequency magnetic field generator, the magnetic field generates an eddy current effect to heat a magnetic oxidant to perform chemical oxidation reaction with pollutants, and the polluted soil is restored, specifically: a high-frequency alternating magnetic field is generated by a high-frequency magnetic field generator, and a magnetic oxidant in polluted soil generates heat due to an eddy current effect; obtaining the separation temperature of the organic pollutants and the soil according to the organic pollutant characteristics of the area to be repaired through big data analysis; acquiring a change rule of a chemical oxidation reaction rate of the organic pollutants in the area to be repaired along with the temperature, and acquiring a target heating temperature based on the separation temperature through the change rule; and heating the polluted soil according to the target heating temperature.
Placing a high-frequency strong magnetic field generator at a target depth position in an injection well, and generating a high-frequency alternating strong magnetic field by the device after alternating current is introduced; at the moment, the magnetic oxidant in the polluted soil is heated due to the eddy current effect, so that the polluted soil is directly heated, the organic pollutants and the soil can be separated and exposed, and the contact area with the chemical oxidant is enlarged; meanwhile, the oxidation property of the magnetic oxidant is activated due to the fact that the soil is heated, the chemical oxidation reaction rate is improved, the repairing effect on organic pollutants which are difficult to volatilize and oxidize is enhanced, and the organic pollutants in the soil are degraded into inorganic small molecules with low toxicity or no toxicity.
According to the embodiment of the invention, the monitoring system acquires temperature information and pollutant concentration information in the chemical oxidation reaction, and controls the temperature information and starts and stops the magnetic field generator according to the pollutant concentration information, specifically:
acquiring temperature information and pollutant concentration information of a chemical oxidation reaction at a target depth position, presetting a pollutant concentration threshold value, and calculating deviation information of the pollutant concentration information and the pollutant concentration threshold value;
presetting a deviation threshold, judging whether the deviation information is larger than a deviation rate threshold, if so, adjusting the target heating temperature of the target depth position, and simultaneously acquiring the oxidant concentration information of the target depth position;
if the oxidant concentration information is smaller than a preset oxidant concentration threshold value, the monitoring system automatically cuts off the power of the magnetic field generator, and puts quantitative magnetic oxidant into soil, so that the oxidant concentration meets a preset oxidant concentration range, and then the magnetic field generator is started;
and when the deviation information is smaller than the deviation threshold value, the pollutant concentration reaches the safety standard, the monitoring system closes the magnetic field generator, stops the feeding of the oxidant, and completes the soil restoration of the area to be restored.
When the concentration of the magnetic oxidant is reduced below a specified value and the concentration of the pollutant does not reach a safety standard, the monitoring system can automatically power off the magnetic field generator, the reaction device is suspended, the hydraulic pressure pump is controlled to put a quantitative oxidant into soil, the magnetic field generator is started, and the reaction process is continued; when the concentration of the pollutant reaches the safety standard, the monitoring system can automatically power off the generator and stop the feeding of the oxidant, and the reaction process is finished.
It should be noted that the present invention further includes correcting the chemical reaction oxidation process by estimating the repair time, specifically:
the method comprises the steps of obtaining pollutant concentration information before restoration of an area to be restored through a monitoring system, and generating first estimated restoration time according to the area information of the area to be restored, the organic pollutant concentration information and the chemical oxidation reaction rate;
generating a pollutant concentration time sequence according to the pollutant concentration information in the repairing process according to the time sequence, and generating a pollutant concentration change curve through the pollutant concentration time sequence;
acquiring pollutant concentration information at a preset time point according to the pollutant concentration change curve, and generating a second estimated repair time according to the pollutant concentration information at the preset time point and the change trend of the concentration change curve;
Comparing the first estimated repair time with the second estimated repair time to generate time deviation, and if the time deviation is larger than a preset deviation threshold value, generating correction information;
and heating the polluted soil according to the target heating temperature.
According to an embodiment of the present invention, the method for obtaining the organic pollutant concentration of the area to be repaired further includes:
dividing a region to be repaired into a plurality of sub-regions, acquiring soil characteristics and organic pollutant characteristics in each sub-region, and generating characteristic values of each sub-region according to the soil characteristics and the organic pollutant characteristics in each sub-region;
comparing the characteristic value deviation rate of each sub-region, and classifying the sub-region smaller than the characteristic value deviation rate as the similar region;
according to the arrangement interval and the arrangement mode of the heat-assisted in-situ chemical oxidation heating wells in the specific subarea, carrying out the arrangement of the heating wells in the similar areas in the area to be repaired;
meanwhile, the organic pollutant concentration information of the specific subarea is obtained according to the monitoring system, the organic pollutant concentration information of the same type of area is generated through the organic pollutant concentration information of the specific subarea, and the organic pollutant concentration of the area to be repaired is generated according to the organic pollutant concentration information of each subarea.
The method is characterized in that the area to be repaired is divided into different subareas, each subarea is operated independently, the operation speed is high, the independent operation results of each subarea are integrated to obtain an integral operation structure, the concentration of the organic pollutants in the area to be repaired and the concentration of the organic pollutants after repair are measured and calculated, and the measuring and calculating efficiency is improved.
According to the embodiment of the invention, the method further comprises the steps of constructing a database to obtain the data reference of the target area to be repaired, specifically:
constructing a database, and storing pollutant concentration and temperature change curves generated by an organic pollutant concentration time sequence in the history repairing process and heat-assisted in-situ chemical oxidation heating well distribution information into the database;
generating a characteristic tag according to the soil characteristics and the organic pollutant characteristics of the target to-be-repaired area, and establishing an index task in the database according to the characteristic tag;
judging the similarity comparison between the characteristic tag and the data in the database, and obtaining historical repair data, wherein the similarity between the soil characteristics of the target area to be repaired and the characteristics of the organic pollutants in the database meets the requirement of a preset value;
and extracting heat auxiliary target heating temperature information and magnetic oxidant feeding amount information according to the historical repair data to serve as data references of the target area to be repaired.
It should be noted that, for quickly acquiring the repair parameters of the target to-be-repaired area, a database is established, wherein the database comprises pollutant concentration and temperature change curves generated by the organic pollutant concentration time sequence of each to-be-repaired area in the historical repair process and thermal-assisted in-situ chemical oxidation heating well distribution information, and the similarity comparison is performed in the database according to the characteristic labels of the target to-be-repaired area, and can be Euclidean distance or cosine comparison, and historical repair data meeting the requirement of a preset value is searched in the database and used as a data reference of the target to-be-repaired area, so that the efficiency of the whole repair process is improved.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above described device embodiments are only illustrative, e.g. the division of the units is only one logical function division, and there may be other divisions in practice, such as: multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. In addition, the various components shown or discussed may be coupled or directly coupled or communicatively coupled to each other via some interface, whether indirectly coupled or communicatively coupled to devices or units, whether electrically, mechanically, or otherwise.
The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units; can be located in one place or distributed to a plurality of network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present invention may be integrated in one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated in one unit; the integrated units may be implemented in hardware or in hardware plus software functional units.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, where the program, when executed, performs steps including the above method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk or an optical disk, or the like, which can store program codes.
Alternatively, the above-described integrated units of the present invention may be stored in a computer-readable storage medium if implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solutions of the embodiments of the present invention may be embodied in essence or a part contributing to the prior art in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a removable storage device, ROM, RAM, magnetic or optical disk, or other medium capable of storing program code.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. The soil remediation control method of the heat-assisted in-situ chemical oxidation is characterized by comprising the following steps of:
acquiring soil characteristics and organic pollutant characteristics of a region to be repaired, and generating heat-assisted in-situ chemical oxidation heating well distribution information according to the soil characteristics and the organic pollutant characteristics;
obtaining the depth information of the polluted soil of the area to be repaired, and pumping quantitative magnetic oxidant into the polluted soil layer through a hydraulic pressure pump according to the depth information of the polluted soil;
placing a high-frequency strong magnetic field generator at a corresponding position of the heating well according to the depth information of the polluted soil;
generating a magnetic field at a target depth position through the high-frequency strong magnetic field generator, wherein the magnetic field generates an eddy current effect to heat a magnetic oxidant to perform chemical oxidation reaction with pollutants, so as to repair the polluted soil;
acquiring temperature information and pollutant concentration information in a chemical oxidation reaction through a monitoring system, and controlling the temperature information and starting and stopping a magnetic field generator according to the pollutant concentration information;
the method comprises the steps of obtaining soil characteristics and organic pollutant characteristics of a region to be repaired, and generating heat-assisted in-situ chemical oxidation heating well distribution information according to the soil characteristics and the organic pollutant characteristics, wherein the distribution information comprises the following specific steps:
Acquiring the water content and the heat conductivity of the soil of the area to be repaired according to the soil characteristics of the area to be repaired, and acquiring the chemical oxidation reaction rate of the organic pollutants according to the organic pollutant characteristics of the area to be repaired;
determining thermal-assisted in-situ chemical oxidation heating well spacing information through the water content, the thermal conductivity and the chemical oxidation reaction rate of the soil;
acquiring distribution information of heat-assisted in-situ chemical oxidation heating wells according to regular triangle or regular hexagon arrangement according to the interval information of the heating wells;
the high-frequency strong magnetic field generator is used for generating a magnetic field at a target depth position, the magnetic field generates an eddy current effect to heat a magnetic oxidant to perform chemical oxidation reaction with pollutants, and the polluted soil is restored, specifically:
a high-frequency alternating magnetic field is generated by a high-frequency strong magnetic field generator, and a magnetic oxidant in polluted soil generates heat due to an eddy current effect;
obtaining the separation temperature of the organic pollutants and the soil according to the organic pollutant characteristics of the area to be repaired through big data analysis;
acquiring a change rule of a chemical oxidation reaction rate of the organic pollutants in the area to be repaired along with the temperature, and acquiring a target heating temperature based on the separation temperature through the change rule;
Heating the contaminated soil according to the target heating temperature;
the monitoring system is used for acquiring temperature information and pollutant concentration information in the chemical oxidation reaction, controlling the temperature information and starting and stopping the magnetic field generator according to the pollutant concentration information, and specifically comprises the following steps:
acquiring temperature information and pollutant concentration information of a chemical oxidation reaction at a target depth position, presetting a pollutant concentration threshold value, and calculating deviation information of the pollutant concentration information and the pollutant concentration threshold value;
presetting a deviation threshold, judging whether the deviation information is larger than a deviation rate threshold, if so, adjusting the target heating temperature of the target depth position, and simultaneously acquiring the oxidant concentration information of the target depth position;
if the oxidant concentration information is smaller than a preset oxidant concentration threshold value, the monitoring system automatically cuts off the power of the magnetic field generator, and puts quantitative magnetic oxidant into soil, so that the oxidant concentration meets a preset oxidant concentration range, and then the magnetic field generator is started;
when the deviation information is smaller than a deviation threshold value, the pollutant concentration reaches a safety standard, the monitoring system closes the magnetic field generator, stops the feeding of the oxidant, and completes the soil restoration of the area to be restored;
The method comprises the steps of obtaining pollutant concentration information before repairing a region to be repaired through a monitoring system, and generating first estimated repairing time according to the region area information to be repaired, the organic pollutant concentration information and the chemical oxidation reaction rate;
generating a pollutant concentration time sequence according to the pollutant concentration information in the repairing process according to the time sequence, and generating a pollutant concentration change curve through the pollutant concentration time sequence;
acquiring pollutant concentration information at a preset time point according to the pollutant concentration change curve, and generating a second estimated repair time according to the pollutant concentration information at the preset time point and the change trend of the concentration change curve;
comparing the first estimated repair time with the second estimated repair time to generate time deviation, and if the time deviation is larger than a preset deviation threshold value, generating correction information;
and adjusting the target heating temperature and the magnetic oxidant feeding amount according to the correction information.
2. The method for controlling soil remediation by thermal-assisted in-situ chemical oxidation according to claim 1, wherein the quantitative magnetic oxidizer is pumped into the contaminated soil layer by hydraulic pressure according to the depth information of the contaminated soil, specifically:
Determining a target depth position according to the polluted soil depth information, and performing hydraulic fracturing on the target depth position by a hydraulic pressure pump to generate cracks;
and pressing a quantitative amount of magnetic oxidant into the fracture as fracture propping agent, so that the fracture is uniformly filled with the magnetic oxidant.
3. A soil remediation control system for thermally assisted in situ chemical oxidation, the system comprising: a memory, a processor, said memory including the control method program of claim 1, said control method program when executed by said processor implementing the steps of:
acquiring soil characteristics and organic pollutant characteristics of a region to be repaired, and generating heat-assisted in-situ chemical oxidation heating well distribution information according to the soil characteristics and the organic pollutant characteristics;
obtaining the depth information of the polluted soil of the area to be repaired, and pumping quantitative magnetic oxidant into the polluted soil layer through a hydraulic pressure pump according to the depth information of the polluted soil;
placing a high-frequency strong magnetic field generator at a corresponding position of the heating well according to the depth information of the polluted soil;
generating a magnetic field at a target depth position through the high-frequency strong magnetic field generator, wherein the magnetic field generates an eddy current effect to heat a magnetic oxidant to perform chemical oxidation reaction with pollutants, so as to repair the polluted soil;
Acquiring temperature information and pollutant concentration information in a chemical oxidation reaction through a monitoring system, and controlling the temperature information and starting and stopping a magnetic field generator according to the pollutant concentration information;
the method comprises the steps of obtaining soil characteristics and organic pollutant characteristics of a region to be repaired, and generating heat-assisted in-situ chemical oxidation heating well distribution information according to the soil characteristics and the organic pollutant characteristics, wherein the distribution information comprises the following specific steps:
acquiring the water content and the heat conductivity of the soil of the area to be repaired according to the soil characteristics of the area to be repaired, and acquiring the chemical oxidation reaction rate of the organic pollutants according to the organic pollutant characteristics of the area to be repaired;
determining thermal-assisted in-situ chemical oxidation heating well spacing information through the water content, the thermal conductivity and the chemical oxidation reaction rate of the soil;
acquiring distribution information of heat-assisted in-situ chemical oxidation heating wells according to regular triangle or regular hexagon arrangement according to the interval information of the heating wells;
the high-frequency strong magnetic field generator is used for generating a magnetic field at a target depth position, the magnetic field generates an eddy current effect to heat a magnetic oxidant to perform chemical oxidation reaction with pollutants, and the polluted soil is restored, specifically:
A high-frequency alternating magnetic field is generated by a high-frequency strong magnetic field generator, and a magnetic oxidant in polluted soil generates heat due to an eddy current effect;
obtaining the separation temperature of the organic pollutants and the soil according to the organic pollutant characteristics of the area to be repaired through big data analysis;
acquiring a change rule of a chemical oxidation reaction rate of the organic pollutants in the area to be repaired along with the temperature, and acquiring a target heating temperature based on the separation temperature through the change rule;
heating the contaminated soil according to the target heating temperature;
the monitoring system is used for acquiring temperature information and pollutant concentration information in the chemical oxidation reaction, controlling the temperature information and starting and stopping the magnetic field generator according to the pollutant concentration information, and specifically comprises the following steps:
acquiring temperature information and pollutant concentration information of a chemical oxidation reaction at a target depth position, presetting a pollutant concentration threshold value, and calculating deviation information of the pollutant concentration information and the pollutant concentration threshold value;
presetting a deviation threshold, judging whether the deviation information is larger than a deviation rate threshold, if so, adjusting the target heating temperature of the target depth position, and simultaneously acquiring the oxidant concentration information of the target depth position;
If the oxidant concentration information is smaller than a preset oxidant concentration threshold value, the monitoring system automatically cuts off the power of the magnetic field generator, and puts quantitative magnetic oxidant into soil, so that the oxidant concentration meets a preset oxidant concentration range, and then the magnetic field generator is started;
when the deviation information is smaller than a deviation threshold value, the pollutant concentration reaches a safety standard, the monitoring system closes the magnetic field generator, stops the feeding of the oxidant, and completes the soil restoration of the area to be restored;
the method comprises the steps of obtaining pollutant concentration information before repairing a region to be repaired through a monitoring system, and generating first estimated repairing time according to the region area information to be repaired, the organic pollutant concentration information and the chemical oxidation reaction rate;
generating a pollutant concentration time sequence according to the pollutant concentration information in the repairing process according to the time sequence, and generating a pollutant concentration change curve through the pollutant concentration time sequence;
acquiring pollutant concentration information at a preset time point according to the pollutant concentration change curve, and generating a second estimated repair time according to the pollutant concentration information at the preset time point and the change trend of the concentration change curve;
Comparing the first estimated repair time with the second estimated repair time to generate time deviation, and if the time deviation is larger than a preset deviation threshold value, generating correction information;
and adjusting the target heating temperature and the magnetic oxidant feeding amount according to the correction information.
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| CN105964677B (en) * | 2016-06-23 | 2022-03-01 | 北京建工环境修复股份有限公司 | In-situ chemical oxidation high-pressure injection optimization restoration method for soil and underground water |
| CN111659723A (en) * | 2020-07-19 | 2020-09-15 | 上海康恒环境修复有限公司 | In-situ thermal desorption remediation system and method for organic contaminated soil |
| CN111960484A (en) * | 2020-08-07 | 2020-11-20 | 宝航环境修复有限公司 | Multidirectional three-dimensional circulation in-situ remediation system |
| CN213591395U (en) * | 2020-11-02 | 2021-07-02 | 中建八局环保科技有限公司 | Chemical oxidation soil prosthetic devices based on thermal strengthening |
| CN113477687B (en) * | 2021-06-14 | 2022-10-28 | 中节能大地（杭州）环境修复有限公司 | Method for restoring low-permeability stratum contaminated soil through chemical oxidation in cooperation with hydraulic fracturing |
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