CN212419083U - Contaminated soil remediation system - Google Patents
Contaminated soil remediation system Download PDFInfo
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- CN212419083U CN212419083U CN202021417933.8U CN202021417933U CN212419083U CN 212419083 U CN212419083 U CN 212419083U CN 202021417933 U CN202021417933 U CN 202021417933U CN 212419083 U CN212419083 U CN 212419083U
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Abstract
The utility model discloses a pollute soil repair system, this dye soil repair system includes: a leaching apparatus comprising a tank capable of storing at least one of the surfactant and the hydrogen peroxide, a leaching injection device capable of delivering a solution agent from the tank to the injection well, and the injection well extending into the contaminated soil; the extraction equipment comprises a suction device and an extraction well, wherein the extraction well extends into the polluted soil, the suction device is connected with the extraction well, and a leaching interval is formed between the injection well and the extraction well. The scheme can solve the problems of low pollutant extraction efficiency, high extraction cost and easy occurrence of secondary pollution in the existing polluted soil remediation process.
Description
Technical Field
The utility model relates to a pollute soil repair technical field, especially relate to a pollute soil repair system.
Background
As an important energy source, petroleum is widely used in industrial production. Leakage accidents are inevitable in the processes of exploitation, processing, transportation, storage and utilization of petroleum, and petroleum hydrocarbon pollution of soil is caused. The water solubility of petroleum substances is generally very low, soil particles are not easy to be soaked by water after adsorbing the petroleum substances, so that the water permeability of the soil is reduced, the water permeability is reduced, the air permeability is poor, the composition and the structure of soil organic matters are changed, the carbon-nitrogen ratio and the carbon-phosphorus ratio of the soil organic matters are changed, and underground water is polluted. Causing great harm to the natural environment and even causing harm to the drinking water safety and food safety of people.
At present, the polluted soil is usually repaired by the following two methods: first, in situ multiphase extraction technique: the extraction device is utilized to extract NAPL Phase (non aqueous Phase liquid) petroleum hydrocarbon pollutants in the soil to the bottom storage tank for separation and disposal, the extraction efficiency of the NAPL Phase petroleum hydrocarbon pollutants in the soil is low, only free pollutants in the soil can be extracted, adsorbed pollutants in the soil cannot be extracted, and a serious tailing phenomenon is formed. Second, heat strengthening technique: the contaminated soil is heated to a certain temperature by means of heat conduction (electric heating, steam heating and hot air heating), so that adsorbed pollutants in the soil are separated and changed into NAPL phase or gas phase, then the extraction device is used for extraction treatment, the extraction efficiency can be improved by temperature rise, but the heat strengthening technology is high in energy consumption and cost, and the risk of pollution source diffusion exists.
Accordingly, it would be desirable to have an extraction system for petroleum hydrocarbon contaminants in soil that overcomes or alleviates the above-mentioned deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a pollute soil repair system to solve the current problem that secondary pollution appears in extracting inefficiency, extraction with high costs and the easy appearance of polluting the in-process pollutant of polluting soil repair.
In order to solve the above problem, the utility model adopts the following technical scheme:
a contaminated soil remediation system comprising:
leaching equipment, comprising a medicament tank, a leaching injection device and an injection well, wherein the medicament tank can store at least one of surfactant and hydrogen peroxide, the injection well extends into polluted soil, and the leaching injection device can convey the medicament in the medicament tank to the injection well;
the extraction equipment comprises a suction device and an extraction well, wherein the extraction well extends into the polluted soil, the suction device is connected with the extraction well, and a leaching interval is formed between the injection well and the extraction well.
The utility model discloses a technical scheme can reach following beneficial effect:
the utility model discloses an among the contaminated soil repair system, utilize surfactant active and/or hydrogen peroxide solution solubilization to take out the mode of annotating, effectively improved the extraction efficiency of extraction equipment, and the cost is lower, does not have secondary pollution's risk. Specifically, the surfactant can reduce the surface tension of the solution, and can dissolve the pollutants in the polluted soil in an adsorption state in water, so that the pollutants in the polluted soil can be conveniently extracted, the extraction efficiency is improved, and the problem that the pollutants in the adsorption state in the multiphase extraction process are difficult to remove is solved; the hydrogen peroxide can be oxidized with pollutants in the polluted soil to generate carbon dioxide and water, and the generated carbon dioxide can dredge soil channels and improve the extraction efficiency of the extraction equipment.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
fig. 1 is a schematic view of a contaminated soil remediation system according to an embodiment of the present invention;
FIG. 2 is a process flow diagram of the contaminated soil remediation system of FIG. 1;
fig. 3 is a schematic view of the connection location of the extraction well and the suction device of the contaminated soil remediation system shown in fig. 1.
Description of reference numerals:
100-polluted soil, 200-agent tank, 210-surfactant agent tank, 220-hydrogen peroxide agent tank, 300-leaching injection device, 400-injection well, 410-input pipe section, 420-injection pipe section, 500-extraction well, 510-output pipe section, 520-suction pipe section, 600-gas-liquid separation device, 700-suction device, 710-liquid suction pipe, 711-liquid suction valve, 720-suction pipe, 721-suction valve, 730-sampling valve, 800-gas treatment device and 900-liquid storage device.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
The embodiment of the utility model discloses pollute soil repair system, see fig. 1 and fig. 2, this pollute soil repair system includes drip washing equipment and extraction equipment.
The leaching apparatus includes a reagent tank 200, a leaching injection device 300, and an injection well 400, the reagent tank 200 being capable of storing at least one of a surfactant and hydrogen peroxide, the injection well 400 extending into the contaminated soil 100, the leaching injection device 300 being capable of transferring the reagent in the reagent tank 200 to the injection well 400, and injecting the surfactant and/or hydrogen peroxide into the contaminated soil through the injection well 400. Specifically, the surfactant can reduce the surface tension of the solution, and can dissolve the pollutants (for example, petroleum hydrocarbon pollutants) in the polluted soil 100 in an adsorption state in water, thereby facilitating the extraction of the pollutants in the polluted soil 100, improving the extraction efficiency, and solving the problem that the pollutants in the adsorption state in the multiphase extraction process are difficult to remove; the hydrogen peroxide can generate oxidation reaction with pollutants in the polluted soil 100 to generate carbon dioxide and water, and the generated carbon dioxide can dredge soil channels and improve the extraction efficiency of the extraction equipment.
The extraction device comprises a suction device 700 and an extraction well 500, wherein the extraction well 500 extends into the contaminated soil 100, the suction device 700 is connected with the extraction well 500, and pollutants in the contaminated soil 100 are extracted through the suction device 700 and the extraction well 500. And, a leaching interval is provided between the injection well 400 and the extraction well 500 so that the contaminated soil 100 can be sufficiently leached by the surfactant and/or hydrogen peroxide injected through the injection well 400. The specific value of the leaching interval can be determined according to the extraction influence radius of the soil, namely the leaching interval is preferably not more than the extraction influence radius of the contaminated soil 100.
The utility model discloses an among the contaminated soil repair system, utilize surfactant active and/or hydrogen peroxide solution solubilization to take out the mode of annotating, effectively improved the extraction efficiency of extraction equipment, and the cost is lower, does not have secondary pollution's risk, reduces the pollutant among the contaminated soil 100, is particularly useful for getting rid of the petroleum hydrocarbon pollutant of NAPL looks (including DNAPL looks (density is more than water) looks and LNAPL looks (density is less than water)) among the contaminated soil.
The well diameters of the injection well 400 and the extraction well 500 may be appropriately selected according to the hydrogeological conditions in which the contaminated soil is located, for example, the well diameter of the injection well is 75 mm, and the well diameter of the extraction well 500 is 140 mm or 200 mm.
Referring to fig. 2, in an embodiment of the present invention, the injection well 400 has a depth less than that of the extraction well 500, which facilitates more complete washing of the contaminated soil 100. Wherein the difference between the depth of the injection well 400 and the depth of the extraction well 500 may be selected according to the permeability of the contaminated soil 100, for example, the depth of the injection well 400 is 1.5 meters less than the depth of the extraction well 500. During the use of the contaminated soil remediation system, both lateral and longitudinal circulation is established between the injection well 400 and the suction well 500 under the dual action of gravity and the suction force of the suction device 700.
Optionally, injection well 400 includes an input pipe segment 410 proximate to a surface of contaminated soil 100 and an injection pipe segment 420 distal from the surface of contaminated soil 100, injection pipe segment 420 being a slotted pipe. After the agent in the agent tank 200 is transferred into the injection well 400, the agent flows to the injection pipe section 420 through the input pipe section 410, and then is injected into the contaminated soil 100 through the outlet of the injection pipe section 420 and the slits on the pipe wall. The depth of the injection well 400 and the fraction of injection pipe segments 420 may be determined, among other things, based on the depth and extent of the area in the contaminated soil 100 where the contaminants are primarily present.
Optionally, the extraction well 500 comprises an output pipe section 510 close to the surface of the contaminated soil 100 and a suction pipe section 520 remote from the surface of the contaminated soil 100, the suction pipe section 520 being a slotted pipe. Contaminant fluid in contaminated soil 100 may enter the interior of suction pipe segment 520 through an inlet of suction pipe segment 520 and a slit in the pipe wall, then flow to output pipe segment 510 and be transported through output pipe segment 510 to subsequent processing and/or storage facilities. The depth of the extraction well 500 and the fraction of the pumping duct section 520 may be determined, among other things, according to the depth and extent of the area of the contaminated soil 100 where the contaminants are predominantly present.
Further, the outside of the injection pipe section 420 is wrapped by a nylon net, and the outside of the suction pipe section 520 is wrapped by a nylon net, so that the situation that soil particles in the polluted soil 100 block slots on the injection pipe section 420 and the suction pipe section 520 to influence the injection of the medicament and the suction of pollutants is avoided.
The number and arrangement of the injection wells 400 and the extraction wells 500 may be appropriately selected according to the actual contamination of the contaminated soil. Optionally, the leaching apparatus includes a plurality of injection wells 400, and the plurality of injection wells 400 are arranged at intervals along the circumferential direction of the extraction well 500, so that the contaminated soil 100 can be sufficiently leached, and the subsequent extraction efficiency can be improved. Furthermore, it was experimentally verified that the ratio between the number of extraction wells 500 and the number of injection wells 400 was 1: 4, a better extraction effect can be obtained.
Referring to fig. 1, in the embodiment of the present invention, the extraction apparatus includes a gas-liquid separation device 600, a gas processing device 800 and a liquid storage device 900, the gas-liquid separation device 600 is disposed between the pumping device 700 and the extraction well 500, the pumping device 700 pumps the fluid in the extraction well 500 out to the gas-liquid separation device 600 for gas-liquid separation, so as to perform a specific treatment on the pollutants of different types. Specifically, the gas-liquid separating device 600 includes a gas outlet and a liquid outlet.
The gas outlet is connected to the gas processing device 800, and the gas processed by the gas processing device 800 can be directly discharged to the external environment or delivered to a device requiring gas consumption. The type of the gas treatment device 800 may be appropriately selected according to the use requirement, for example, an activated carbon adsorption device, an RCO (Regenerative Catalytic oxidation) exhaust gas treatment device, an RTO (Regenerative Thermal Oxidizer) exhaust gas treatment device, and the like. The liquid outlet is connected with the liquid storage device 900, and the liquid separated by the gas-liquid separation device 600 can be stored and then conveyed to qualified hazardous waste disposal units for subsequent treatment.
In addition, if necessary, the contaminated soil remediation system may further include an oil-water separation device, a liquid treatment device, and the like, wherein the oil-water separation device may further separate the liquid separated by the gas-liquid separation device 600, and the liquid treatment device may directly perform subsequent treatment on the liquid separated by the gas-liquid separation device 600, or perform subsequent treatment on the oil or water separated by the oil-water separation device.
The embodiment of the present invention provides a suction device 700 is disposed between the gas outlet and the gas processing device 800, and the gas separated by the gas-liquid separation device 600 is conveyed to the gas processing device 800 through the suction device 700 without additionally disposing an air extractor, so that the contaminated soil remediation system is more compact in structure.
Optionally, the medicament tank 200 includes a surfactant medicament tank 210 and a hydrogen peroxide medicament tank 220, wherein a stirring device is disposed in the surfactant medicament tank 210 and/or the hydrogen peroxide medicament tank 220. The stirring device can uniformly stir the surfactant solution in the surfactant agent tank 210 and the hydrogen peroxide in the hydrogen peroxide agent tank 220, so that the utilization rate of the agent is improved. Wherein, the concrete type of agitating unit has carried out suitable selection according to actual need, for example, agitating unit includes stirring rake, driving motor and converter, can adjust the stirring speed of stirring rake in a flexible way through the converter to make the medicament stirring in medicament jar 200 abundant. In addition, the medicine tank 200 further includes a medicine injection pump for facilitating injection of the medicine and water required for the medicine tank 200.
The specific type of the suction device 700 may be appropriately selected according to actual needs. Referring to fig. 1 and 3, in the embodiment of the present invention, the suction device 700 includes a vacuum pump and a vacuum tank, the extraction equipment includes a suction pipe, the suction pipe connects the suction device 700 and the extraction well 500, and the suction pipe includes a suction pipe 710 and a suction pipe 720.
The vacuum pump can adjust the pressure in the vacuum tank to make the extraction pressure of the suction device 700 can be adjusted between the liquid phase extraction pressure and the gas phase extraction pressure, only one vacuum pump is needed to perform the liquid phase extraction and the gas phase extraction, the structure of the suction device 700 is simplified, and the use cost of the suction device 700 is reduced. The design pressure of the vacuum tank can be selected appropriately according to the actual use requirement, for example, the design pressure of the vacuum tank is 0MPa to-0.01 MPa. The specific type of vacuum pump can be suitably selected according to actual needs, for example, a water ring vacuum pump.
The extraction device further comprises a sampling valve 730, and during the process of sucking the pollutants by the suction device 700, the sampling valve 730 can extract the fluid sample and check the content of the pollutants in the fluid sample, so as to judge whether the remediation of the polluted soil 100 is completed.
In extracting the contaminants from the contaminated soil 100 with the extraction device 700, the field crew may determine the characteristics of the extracted fluid in the extraction well 500 in any suitable manner, such as providing a visual tubing section on the suction tubing. The extraction pressure of the suction device 700 is made to be the liquid phase extraction pressure when the fluid in the suction duct is liquid or mainly liquid, and the extraction pressure of the suction device 700 is made to be the vapor phase extraction pressure when the fluid in the suction duct is gas or mainly gas. Further, when the extraction pressure is a liquid-phase extraction pressure, the suction pipe 710 is connected, and the suction pipe 720 is disconnected; when the extraction pressure is vapor phase extraction pressure, the extraction pipe 720 is connected and the extraction pipe 710 is disconnected. Wherein, the liquid extracting pipe 710 is provided with a liquid extracting valve 711, the air extracting pipe 720 is provided with an air extracting valve 721, and the states of the liquid extracting pipe 710 and the air extracting pipe 720 are adjusted by adjusting the states of the liquid extracting valve 711 and the air extracting valve 721. According to different requirements of operation conditions, the suction pipeline can be changed by switching the liquid suction valve 711 and the air suction valve 721, so that the purposes of reducing the abrasion of the suction device 700, saving energy and reducing consumption are achieved.
In the suction process of the suction device 700, liquid phase suction is performed first and then gas phase suction is performed, and when it is determined whether the remediation of the contaminated soil 100 is completed, the determination is performed by using a gas sample. Therefore, the sampling valve 730 is preferably disposed on the exhaust tube 720, so as to facilitate obtaining a gas sample from the exhaust tube 720, and determining whether the remediation of the contaminated soil 100 is completed by checking the content of the contaminants in the gas sample.
The embodiment of the utility model provides an in, pollute soil repair system includes controlling means to realize polluting repair system's automatic control. Alternatively, the control means are able to control the extraction flow of the extraction device. Alternatively, the control means can control the extraction pressure of the suction device 700. Alternatively, the control means can control the flow of the rinsing device. Optionally, the washing device has a first state for washing the surfactant and a second state for washing the hydrogen peroxide, and the control device can control the washing device to switch between the first state and the second state. The control device can also control other devices and equipment needing to be controlled of the polluted soil remediation device under the condition of need. The type of the control device can be properly selected according to actual needs, for example, a single chip microcomputer or a PLC.
The utility model also discloses a method of restoring contaminated soil, this method includes following step:
a first step of rinsing at least one of a surfactant and hydrogen peroxide to the contaminated soil 100; the surfactant can lower the surface tension of the solution and dissolve adsorbed petroleum hydrocarbon contaminants in the contaminated soil 100 in water. The hydrogen peroxide can be oxidized with the pollutants in the polluted soil 100 to generate carbon dioxide and water, and the generated carbon dioxide can dredge the soil channel and improve the extraction efficiency of the pollutant fluid. In addition, the surfactant and/or hydrogen peroxide are/is utilized for solubilization and injection, the cost is low, and the risk of secondary pollution is avoided.
In the second step, the fluid in the contaminated soil 100 is pumped out. The fluid includes a gas and a liquid, and the fluid carries contaminants (e.g., heavy metal contaminants, petroleum hydrocarbon contaminants, etc.) in the contaminated soil 100 such that the contaminants in the contaminated soil 100 are drawn by the suction device, thereby removing the contaminants in the contaminated soil 100. By leaching the surfactant and/or hydrogen peroxide into the contaminated soil 100, the extraction efficiency of the pollutants in the contaminated soil 100 is remarkably improved, and the problems of low extraction efficiency and difficulty in removing the pollutants in an adsorption state in a multiphase extraction process are solved.
In the first step, the surfactant or the hydrogen peroxide solution may be separately washed into the contaminated soil 100, or both may be used. Optionally, the contaminated soil 100 is washed with a surfactant and hydrogen peroxide to further improve the extraction efficiency of extracting the contaminants in the contaminated soil 100.
Further, the first step includes:
a first substep of rinsing the contaminated soil 100 with a surfactant capable of dissolving petroleum hydrocarbon contaminants in the contaminated soil 100 in water;
and in the second substep, the polluted soil 100 is rinsed with hydrogen peroxide, and the hydrogen peroxide can chemically react with petroleum hydrocarbon pollutants in the polluted soil 100 to generate carbon dioxide and water.
The alternate leaching of the surfactant and the hydrogen peroxide to the contaminated soil 100 can further improve the removal efficiency of the contaminants.
The type and concentration of the surfactant may be appropriately selected depending on the type of contaminant to be removed actually. Optionally, the surfactant is an anionic surfactant, the surfactant is formulated as a surfactant solution having a concentration of 0.5% to 2.5%, and the surfactant solution is rinsed into the contaminated soil 100. The surfactant is fully contacted with the pollutants, and the dissolved pollutants are dissolved in water, so that the extraction efficiency of the extraction device is improved.
The concentration of the hydrogen peroxide can be properly selected according to the use requirement. However, the hydrogen peroxide is oxidized to generate a large amount of bubbles after contacting with the pollutants, and may change the soil properties and affect the permeability of the agent in the soil. Optionally, the concentration of the hydrogen peroxide is 25% to 35%, so that the influence of overhigh concentration of the hydrogen peroxide on the permeability of the hydrogen peroxide in the soil is avoided.
The dosage proportion of the surfactant solution and the hydrogen peroxide can be properly selected according to actual conditions. Optionally, the ratio of the leaching amount of the surfactant solution to the leaching amount of the hydrogen peroxide is less than or equal to 10 and greater than or equal to 3, so that the influence of excessive consumption of the hydrogen peroxide on the permeability of the medicament is avoided.
The fluid extracted from the contaminated soil 100 includes a liquid phase fluid and a vapor phase fluid, wherein the extraction pressures required for the vapor phase fluid and the liquid phase fluid are different. Optionally, the second step comprises: the method comprises a liquid phase extraction step and a gas phase extraction step, wherein the extraction pressure of the liquid phase extraction step is lower than that of the gas phase extraction step, and corresponding extraction pressure is used for different extraction steps, so that energy is saved, and the service life of extraction equipment can be prolonged.
The extraction pressure in the liquid phase extraction step and the extraction pressure in the gas pressure extraction step can be appropriately selected according to actual conditions. Optionally, the extraction pressure in the liquid phase extraction step is from-0.05 MPa to-0.09 MPa, and the extraction pressure in the vapor phase extraction step is from-0.02 MPa to-0.04 MPa. For example, the extraction pressure in the liquid phase extraction step is-0.07 MPa, and the extraction pressure in the vapor phase extraction step is-0.035 MPa.
Further, the method includes a third step of repeating the first and second steps to extract as much contaminants as possible from the contaminated soil 100 by washing and extracting for a plurality of times. Wherein, the times of repeating the first step and the second step can be properly selected according to the actual extraction condition.
Optionally, the first step is preceded by a pre-extraction step in which the fluid in the contaminated soil 100 is pumped out. Firstly extracting the free pollutants which are easy to extract in the polluted soil 100, then dissolving the residual free pollutants which are difficult to extract and the adsorbed pollutants into water by using a surfactant and/or hydrogen peroxide, and extracting the residual free pollutants and the adsorbed pollutants by using an extraction device. The utilization rate of the surfactant and/or the hydrogen peroxide is improved, and the extraction efficiency of the pollutants is further improved. Wherein the pre-extraction step may comprise: a liquid phase pre-extraction step and a gas phase pre-extraction step.
In the embodiment of the present invention, the preferred extraction steps for extracting the contaminants in the contaminated soil 100 are: a liquid phase pre-extraction step, a gas phase pre-extraction step, leaching surfactant solution, leaching hydrogen peroxide, a liquid phase extraction step and a gas phase extraction step. And (3) repeatedly leaching the surfactant solution, leaching hydrogen peroxide, the liquid phase extraction step and the gas phase extraction step under the condition of need.
Compared with the traditional multiphase extraction technology, the extraction efficiency of NAPL phase pollutants by adopting the method for restoring the polluted soil disclosed by the utility model can be improved by more than 51%. For example, when two identical contaminated soils were extracted at a liquid extraction pressure of 60KPa and a vapor extraction pressure of 32KPa, among them,
extracting the pollutants by adopting a traditional multiphase extraction technology until the proportion of the oil-containing pollutants in a suction pipe is lower than a first preset value, wherein the volume of the extracted oil-water mixture is 24.8 liters, and the volume of the oil is 2.3 liters;
and secondly, the method for restoring the polluted soil is adopted, until the proportion of the oil-containing pollutants in the suction pipe is lower than a first preset value, wherein 200 kg of surfactant and 2.2 tons of hydrogen peroxide (27.5%) are consumed, the volume of the pumped oil-water mixture is 6300 liters, and the volume of the oil is 900 liters.
The specific value of the first predetermined value may be suitably selected according to actual needs, mainly for comparing the extraction efficiency of the NAPL phase contaminants from the first soil and the second soil under similar conditions. Compared with the first portion of the polluted soil, the extraction efficiency of NAPL phase pollutants in the extracted oil-water mixture of the second portion of the polluted soil is improved by about 54 percent.
The utility model discloses what the key description in the above embodiment is different between each embodiment, and different optimization characteristics are as long as not contradictory between each embodiment, all can make up and form more preferred embodiment, consider that the literary composition is succinct, then no longer describe here.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (9)
1. A contaminated soil remediation system, comprising:
leaching equipment comprising a tank (200) for a chemical, a leaching injection device (300) and an injection well (400), the tank (200) being capable of storing at least one of a surfactant and hydrogen peroxide, the injection well (400) extending into contaminated soil (100), the leaching injection device (300) being capable of delivering the chemical in the tank (200) to the injection well (400);
extraction equipment comprises a suction device (700) and an extraction well (500), wherein the extraction well (500) extends into the contaminated soil (100), the suction device (700) is connected with the extraction well (500), and a leaching interval is arranged between the injection well (400) and the extraction well (500).
2. The contaminated soil remediation system of claim 1, wherein the depth of said injection well (400) is less than the depth of said extraction well (500).
3. The contaminated soil remediation system of claim 1,
the injection well (400) comprising an input tubing section (410) proximal to a surface of the contaminated soil (100) and an injection tubing section (420) distal to the surface of the contaminated soil (100), the injection tubing section (420) being a slotted tubing;
the extraction well (500) comprises an output pipe section (510) close to the surface of the contaminated soil (100) and a suction pipe section (520) far away from the surface of the contaminated soil (100), the suction pipe section (520) being a slotted pipe.
4. Contaminated soil remediation system according to claim 1, wherein said washing apparatus comprises a plurality of said injection wells (400), said plurality of injection wells (400) being spaced apart along a circumference of said extraction wells (500), wherein a ratio of the number of said extraction wells (500) to the number of said injection wells (400) is 1: 4.
5. contaminated soil remediation system according to claim 1, wherein the extraction apparatus comprises a gas-liquid separation device (600), a gas treatment device (800) and a liquid storage device (900), the gas-liquid separation device (600) being arranged between the suction device (700) and the extraction well (500), the gas-liquid separation device (600) comprising a gas outlet and a liquid outlet, wherein the gas outlet is connected to the gas treatment device (800) and the liquid outlet is connected to the liquid storage device (900).
6. Contaminated soil remediation system according to claim 5, wherein the suction device (700) is arranged between the gas outlet and the gas treatment device (800), the suction device (700) being capable of conveying gas separated by the gas-liquid separation device (600) to the gas treatment device (800).
7. The contaminated soil remediation system of claim 1, wherein the tank (200) comprises a surfactant tank (210) and a hydrogen peroxide solution tank (220), wherein a stirring device is disposed in the surfactant tank (210) and/or the hydrogen peroxide solution tank (220).
8. Contaminated soil remediation system according to claim 1, wherein the suction device (700) comprises a vacuum pump, a vacuum tank, the extraction apparatus further comprising a suction pipe connecting the suction device (700) and the extraction well (500), the suction pipe comprising a suction pipe (710) and a suction pipe (720), the vacuum pump being capable of adjusting the pressure within the vacuum tank such that the extraction pressure of the suction device (700) is capable of being adjusted between a liquid phase extraction pressure and a gas phase extraction pressure, wherein,
under the condition that the extraction pressure is the liquid phase extraction pressure, the liquid extraction pipe (710) is communicated, and the air extraction pipe (720) is disconnected;
and when the extraction pressure is the vapor extraction pressure, the extraction pipe (720) is connected, and the liquid extraction pipe (710) is disconnected.
9. The contaminated soil remediation system of any one of claims 1 to 8, wherein the contaminated soil remediation system includes a control means, wherein,
the control device can control the extraction flow of the extraction equipment; and/or
The control means being able to control the extraction pressure of the suction means (700); and/or
The control device can control the leaching flow of the leaching equipment; and/or
The washing equipment has a first state for washing the surfactant and a second state for washing the hydrogen peroxide, and the control device can control the washing equipment to be switched between the first state and the second state.
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|---|---|---|---|
| CN202021417933.8U CN212419083U (en) | 2020-07-17 | 2020-07-17 | Contaminated soil remediation system |
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| CN202021417933.8U CN212419083U (en) | 2020-07-17 | 2020-07-17 | Contaminated soil remediation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113695369A (en) * | 2021-11-01 | 2021-11-26 | 北京高能时代环境技术股份有限公司 | Method for in-situ remediation of petroleum hydrocarbon contaminated soil through multi-technology coupling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113695369A (en) * | 2021-11-01 | 2021-11-26 | 北京高能时代环境技术股份有限公司 | Method for in-situ remediation of petroleum hydrocarbon contaminated soil through multi-technology coupling |
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