CN112496018A - Self-sustaining oxidation extraction system and method for in-situ thermal desorption tail gas in soil remediation field - Google Patents
Self-sustaining oxidation extraction system and method for in-situ thermal desorption tail gas in soil remediation field Download PDFInfo
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- CN112496018A CN112496018A CN202011258814.7A CN202011258814A CN112496018A CN 112496018 A CN112496018 A CN 112496018A CN 202011258814 A CN202011258814 A CN 202011258814A CN 112496018 A CN112496018 A CN 112496018A
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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
- B09C1/06—Reclamation of contaminated soil thermally
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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
- B09C1/005—Extraction of vapours or gases using vacuum or venting
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The invention discloses a self-sustaining oxidation extraction system of in-situ thermal desorption tail gas in the field of soil remediation, which comprises: the device comprises an underground extraction pipe, a heat storage filler, a heating rod, a ground surface covering layer, an air supply pipe and a temperature measurement sensor; one part of the underground extraction pipe is buried in the repaired soil, one end of the underground extraction pipe buried in the repaired soil is an air inlet end, and the air inlet end is open; the invention also discloses a self-sustaining oxidation extraction method of the in-situ thermal desorption tail gas in the field of soil remediation, which comprises the following steps: step S1, installing a self-sustaining oxidation extraction system; step S2, extracting tail gas, and heating the heat storage filler; step S3, monitoring the temperature change condition of the heat storage filler; step S4, when the temperature rise caused by the oxidation reaction is enough to carry out self-sustaining oxidation, stopping heating, and opening an air supply pipe; the invention changes the extraction structure of the extraction system, the oxidation treatment is carried out before the extraction gas leaves the ground, and the oxidation heat can continuously heat the soil to be repaired.
Description
Technical Field
The invention relates to the technical field of soil remediation, in particular to a self-sustaining oxidation extraction system and a self-sustaining oxidation extraction method for in-situ thermal desorption tail gas in the field of soil remediation.
Background
Persistent Organic Pollutants (POPs) have attracted wide attention in international society because they have the characteristics of long-term residue, biological accumulation, semi-volatility, high toxicity and the like, can migrate in long distances in the environment such as atmosphere, water, soil and the like, and finally enter human bodies through food chains. Researches find that long-term chronic exposure of POPs can cause cancers, damage central nervous system and peripheral nervous system, destroy immune system, destroy fecundity and influence normal development of infants; the influence of certain persistent organic pollutants on human beings lasts for several generations, and the persistent organic pollutants form a great threat to the survival and the multiplication and the sustainable development of the human beings.
With the rapid advance of industrialization and urbanization, some production enterprises related to POPs close or switch production. As the production equipment is old, the process is laggard, the factory building is simple and crude, and the discharge of 'three wastes' and the like in the production process inevitably cause the production factory sites of the POPs chemicals, the stacking sites of the toxic and harmful POPs wastes and the peripheral sites to become POPs pollution sites. The soil in POPs polluted fields loses the original physicochemical and biological characteristics, and obvious adverse effects are caused to the surrounding environment and human bodies, and the soil can be reused only by being treated.
The thermal desorption technology is a repair means which is verified and widely adopted aiming at the POPs site pollution repair technology. Thermal desorption techniques remove volatile or semi-volatile organic contaminants by heating the contaminated soil. The POPs site pollution remediation technology can be divided into an in-situ remediation technology and an ex-situ remediation technology according to the position of a remediation project. The in-situ remediation refers to the in-situ treatment of pollutants in a polluted site; ectopic remediation refers to the soil being excavated and then treated.
The extracted tail gas of the traditional in-situ thermal desorption technology needs to be conveyed to a professional tail gas treatment unit for treatment. At the in-process of carrying, the temperature of tail gas can reduce, follow-up intensification processing that still needs, and the heat of tail gas can't be used for the soil intensification moreover, has caused the heat waste to partial organic pollutant can condense in transmission pipeline, finally gets into waste liquid treatment system, has increased the waste liquid treatment volume.
Disclosure of Invention
In view of the above, the present invention aims to provide a self-sustaining oxidation extraction system and a method thereof for in-situ thermal desorption tail gas in the field of soil remediation, and mainly solves the problems that: for the traditional in-situ thermal desorption process, the temperature of the extracted tail gas can be reduced in the transportation process, the subsequent heating treatment is still needed, the heat of the tail gas cannot be used for heating the soil, the heat waste is caused, part of organic pollutants can be condensed in a transmission pipeline and finally enter a waste liquid treatment system, and the waste liquid treatment capacity is increased.
The invention changes the extraction structure of the tail gas extraction system, the oxidation treatment is carried out before the extraction gas leaves the ground, and the oxidation heat can continuously heat the soil to be repaired. In order to achieve the above purpose, the invention provides the following technical scheme:
a self-sustaining oxidation extraction system of normal position thermal desorption tail gas for soil restoration field includes:
the device comprises an underground extraction pipe, a heat storage filler, a heating rod, a ground surface covering layer, an air supply pipe and a temperature measurement sensor;
one part of the underground extraction pipe is buried in the repaired soil, one end of the underground extraction pipe buried in the repaired soil is an air inlet end, the air inlet end is open, a first closed cover plate is arranged at the port of one end of the underground extraction pipe exposed out of the repaired soil, and the underground extraction pipe is provided with an extraction device;
the underground part of the underground extraction pipe is filled with heat storage filler, and the heating end of the heating rod, the temperature measuring end of the temperature measuring sensor and the gas injection port of the gas supplementing pipe are arranged in the heat storage filler;
the heating rod and the electric connection end of the temperature measurement sensor both penetrate through the first closed cover plate to be connected with an external power supply, and the air supplement port of the air supplement pipe penetrates through the first closed cover plate to be communicated with external air;
the surface covering layer is laid on the surface layer of the soil to be repaired.
Furthermore, one part of the underground extraction pipe is buried in the repaired soil at an angle vertical or parallel to the ground surface; and the pipe wall of the air inlet end of the underground extraction pipe is provided with an opening or a cutting seam.
Furthermore, when one part of the underground extraction pipe is buried in the restored soil at an angle vertical to the ground surface, the extraction device is structurally characterized in that an opening is formed in the side wall of the overground part of the underground extraction pipe, an extraction interface is arranged on the opening, and the extraction interface is connected with an extraction fan;
furthermore, when one part of the underground extraction pipe is buried in the restored soil at an angle parallel to the ground surface, a second closed cover plate is arranged inside the underground part of the underground extraction pipe, and heat storage filler is filled between the second closed cover plate and the air inlet end of the underground extraction pipe;
the heating rod and the electric connection end of the temperature measurement sensor penetrate through the second closed cover plate;
an air supplementing port of the air supplementing pipe penetrates through the second closed cover plate;
the extraction device is structurally characterized in that an extraction inner pipe is arranged in the heat storage filler, the air inlet end of the extraction inner pipe is arranged in the heat storage filler, and the extraction end of the extraction inner pipe sequentially penetrates through the second closed cover plate and the first closed cover plate to be connected with an extraction fan.
Further, the heat storage filler is made of mineral materials, silicate materials, metal materials or metal oxide materials; the mineral material is cobblestone, yellow sand or broken stone; the silicate material is quartz sand, glass particles, asbestos fiber material, porous ceramic material or granular ceramic material; the metal material is a metal wire mesh or metal particles; the metal oxide material is magnesium oxide or magnesia.
Further, the heating rod is an electric heating rod, a hot gas heating rod, a heat conduction oil pipe heating rod, a circulating air pipe heating rod or a heat pipe heating rod; the heating rod is arranged in the heat storage filler in a U shape.
Further, the outer wall of the underground extraction pipe is wrapped with an insulating layer; the heat-insulating layer is made of glass fiber cotton, rock wool, aluminum silicate felt, aerogel felt, expanded perlite, micro-nano heat-insulating material, foamed cement or heat-insulating coating.
The invention also provides a self-sustaining oxidation extraction method of the in-situ thermal desorption tail gas in the field of soil remediation, which comprises the following steps:
step S1, installing a self-sustaining oxidation extraction system according to the concrete condition of the soil to be repaired, wherein the depth of the underground water level needs to be ensured to be deeper than the embedding depth of the underground extraction pipe;
step S2, turning on an extraction fan, extracting tail gas through an extraction device, and turning on a heating rod to heat the heat storage filler;
step S3, in the process that the heating rod heats the heat storage filler, the temperature sensor monitors the temperature change condition of the heat storage filler;
and step S4, before the tail gas is subjected to self-sustaining oxidation, the temperature rise of the heat storage filler is gradually stabilized until the temperature is constant, and when the temperature measurement sensor monitors that the temperature rise of the heat storage filler is increased or the temperature is further increased after the temperature reaches the constant temperature, the temperature rise of pollutants in the tail gas caused by oxidation reaction in the heat storage filler is enough for self-sustaining oxidation, the heating of the heating rod is stopped, and the air supplement pipe is opened.
The invention has the beneficial effects that:
the invention provides a self-sustaining oxidation extraction system and a self-sustaining oxidation extraction method for in-situ thermal desorption tail gas, which have the advantages of low energy consumption, compact structure and convenient construction and are used in the field of soil remediation. The invention changes the extraction structure of the extraction system, the oxidation treatment is carried out before the extraction gas leaves the ground, and the oxidation heat can continuously heat the soil to be repaired; the invention reasonably utilizes the heat generated by the oxidation of the waste gas and saves a large amount of energy.
Drawings
FIG. 1 is a schematic diagram of a sustained oxidation extraction system according to the present invention;
FIG. 2 is a schematic diagram of another sustained oxidation extraction system according to the present invention.
Description of the drawings:
1-underground extraction pipe, 2-heat storage filler, 3-heating rod, 4-surface covering layer, 5-air supplement pipe, 6-temperature measurement sensor, 7-heat preservation layer, 81-first sealing cover plate, 82-second sealing cover plate, 91-extraction interface and 92-extraction inner pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, the embodiment provides a self-sustained oxidation extraction system for in-situ thermal desorption tail gas in the field of soil remediation, wherein a part of an underground extraction pipe 1 of the system is arranged in the soil to be remediated in a manner of being vertical to the ground plane; the system specifically comprises:
the system comprises an underground extraction pipe 1, a heat storage filler 2, a heating rod 3, a ground surface covering layer 4, an air supply pipe 5 and a temperature measurement sensor 6; in the embodiment, in order to increase the influence radius of the underground extraction pipe 1, the pipe wall of the air inlet end of the underground extraction pipe 1 is provided with an opening or a cutting seam; a first closed cover plate 81 is arranged at the port of one end of the underground extraction pipe 1 exposed out of the repaired soil, and an extraction device is arranged on the underground extraction pipe 1; specifically, in this embodiment, the extraction device is structured such that an opening is formed in a side wall of an overground portion of the underground extraction pipe 1, an extraction port 91 is formed in the opening, and the extraction port 91 is connected to an extraction fan;
the underground part of the underground extraction pipe 1 is filled with heat storage filler 2, and the heating end of the heating rod 3, the temperature measuring end of the temperature measuring sensor 6 and the gas injection port of the gas supplementing pipe 5 are arranged in the heat storage filler 2; specifically, the heating rod 3 is arranged in the heat storage filler 2 in a U shape;
the electric connection ends of the heating rod 3 and the temperature measuring sensor 6 are connected with an external power supply through the first closed cover plate 81, and the air supplement port of the air supplement pipe 5 is communicated with external air through the first closed cover plate 81; the surface covering layer 4 is laid on the surface layer of the soil to be restored.
In order to reduce the preheating time, the outer wall of the underground extraction pipe 1 is wrapped with an insulating layer 7, and in the embodiment, the material of the insulating layer 7 can be selected as follows: glass fiber cotton, rock wool, aluminum silicate felt, aerogel felt, expanded perlite, micro-nano heat insulation material, foamed cement or heat insulation coating; the arrangement position of the heat insulation layer 7 can be selected in various ways, and the heat insulation layer 7 can only wrap the section of the pipe body filled with the heat storage filler 2 and can also wrap all the pipe bodies of the underground extraction pipe 1.
Specifically, in this embodiment, the heat storage filler 2 may be selected from: a mineral material, a silicate material, a metal material or a metal oxide material, more specifically, the mineral material is cobblestone, yellow sand or crushed stone; the silicate material is quartz sand, glass particles, asbestos fiber material, porous ceramic material or granular ceramic material; the metal material is a metal wire mesh or metal particles; the metal oxide material is magnesium oxide or magnesia; specifically, in this embodiment, the heating rod 3 has multiple options, and may be an electric heating rod 3, a hot gas heating rod 3, a heat conduction oil pipe heating rod 3, a circulating air pipe heating rod 3, or a heat pipe heating rod 3.
The specific choice of material for the heat accumulating filler 2 and the specific choice of type of the heating rod 3 will depend on the specific situation at the site where the system is to be implemented.
Example 2
Referring to fig. 2, the present embodiment provides another self-sustained oxidation extraction system for in-situ thermal desorption tail gas in the field of soil remediation, which is different from embodiment 1 in that a part of an underground extraction pipe 1 of the system is arranged in the soil to be remediated in a horizontal manner with respect to the ground plane; a second closed cover plate 82 is arranged inside the underground part of the underground extraction pipe 1, and a heat storage filler 2 is filled between the second closed cover plate 82 and the air inlet end of the underground extraction pipe 1;
compared with the embodiment 1, in the embodiment, the heating end of the heating rod 3, the temperature measuring end of the temperature measuring sensor 6 and the gas injection port of the gas supplementing pipe 5 are also arranged in the heat storage filler 2; however, the electrical connection ends of the heating rod 3 and the temperature measuring sensor 6 sequentially pass through the second sealing cover plate 82 and the first sealing cover plate 81 and then are connected with an external power supply, and the air supplement opening of the air supplement pipe 5 also sequentially passes through the second sealing cover plate 82 and the first sealing cover plate 81 to be communicated with the outside air.
In this embodiment, the specific structural form of the extraction device provided on the underground extraction pipe 1 is as follows: an extraction inner pipe 92 is arranged in the heat storage filler 2, the air inlet end of the extraction inner pipe 92 is arranged in the heat storage filler 2, and the extraction end of the extraction inner pipe 92 sequentially penetrates through the second closed cover plate 82 and the first closed cover plate 81 to be connected with an extraction fan.
Example 3
Referring to fig. 1 or fig. 2, this embodiment provides a self-sustaining oxidation extraction method of in-situ thermal desorption tail gas for the field of soil remediation, which specifically includes:
step S1, installing a self-sustaining oxidation extraction system according to the concrete condition of the soil to be repaired, and ensuring that the depth of the underground water level is deeper than the embedding depth of the underground extraction pipe 1; the specific situation according to the soil to be repaired means that the self-sustaining oxidation extraction system is installed in consideration of the area and depth of the soil to be repaired, whether underground water exists, the depth of the underground water and the like.
And step S2, turning on an extraction fan, extracting tail gas through an extraction device, and turning on a heating rod 3 to heat the heat storage filler 2. In this step, the extracted tail gas is subjected to oxidation reaction in the heated heat storage filler 2 for the early stage of extraction, and the concentration of the pollutants in the extracted tail gas is low, and the oxygen in the extracted gas can generally maintain the oxidation oxygen demand in this stage. For the site with the volatile organic pollutants as the main pollutants, the air supplementing pipe 5 is partially opened at the stage to supplement air in the heat storage filler 2 so as to support the oxidation reaction of the tail gas.
Step S3, in the process that the heating rod 3 heats the heat storage filler 2, the temperature sensor 6 monitors the temperature change condition of the heat storage filler 2; in this step, the oxidation reaction of the off-gas gives off heat, which also heats the heat storage filler 2.
Step S4, before the self-sustaining oxidation of the tail gas occurs, the temperature rise of the heat storage filler 2 will gradually stabilize until the temperature is constant, and when the temperature sensor 6 monitors that the temperature rise of the heat storage filler 2 increases or the temperature further increases after reaching the constant temperature, the temperature rise of the tail gas in the heat storage filler 2 due to the oxidation reaction is enough for the self-sustaining oxidation, the heating of the heating rod 3 is stopped, and the air supplement pipe 5 is opened.
In this step, the pollutants in the extracted exhaust gas are oxidized in the heated heat storage filler 2, and at the same time, the air is supplied to the heat storage filler 2 through the air supply pipe 5, thereby supporting the oxidation of the exhaust gas.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (8)
1. A self-sustaining oxidation extraction system of normal position thermal desorption tail gas for soil remediation field, which is characterized by comprising:
the device comprises an underground extraction pipe, a heat storage filler, a heating rod, a ground surface covering layer, an air supply pipe and a temperature measurement sensor;
one part of the underground extraction pipe is buried in the repaired soil, one end of the underground extraction pipe buried in the repaired soil is an air inlet end, the air inlet end is open, a first closed cover plate is arranged at the port of one end of the underground extraction pipe exposed out of the repaired soil, and the underground extraction pipe is provided with an extraction device;
the underground part of the underground extraction pipe is filled with heat storage filler, and the heating end of the heating rod, the temperature measuring end of the temperature measuring sensor and the gas injection port of the gas supplementing pipe are arranged in the heat storage filler;
the heating rod and the electric connection end of the temperature measurement sensor both penetrate through the first closed cover plate to be connected with an external power supply, and the air supplement port of the air supplement pipe penetrates through the first closed cover plate to be communicated with external air;
the surface covering layer is laid on the surface layer of the soil to be repaired.
2. The self-sustaining oxidation extraction system of in-situ thermal desorption tail gas for soil remediation field of claim 1, wherein: one part of the underground extraction pipe is buried in the repaired soil at an angle vertical or parallel to the ground surface; and the pipe wall of the air inlet end of the underground extraction pipe is provided with an opening or a cutting seam.
3. The self-sustaining oxidation extraction system of in-situ thermal desorption tail gas for soil remediation field of claim 2, wherein: when one part of the underground extraction pipe is buried in the restored soil at an angle vertical to the ground surface, the extraction device is structurally characterized in that an opening is formed in the side wall of the overground part of the underground extraction pipe, an extraction interface is arranged on the opening, and the extraction interface is connected with an extraction fan.
4. The self-sustaining oxidation extraction system of in-situ thermal desorption tail gas for soil remediation field of claim 2, wherein: when one part of the underground extraction pipe is buried in the restored soil in an angle parallel to the ground surface, a second closed cover plate is arranged inside the underground part of the underground extraction pipe, and heat storage filler is filled between the second closed cover plate and the air inlet end of the underground extraction pipe;
the heating rod and the electric connection end of the temperature measurement sensor penetrate through the second closed cover plate;
an air supplementing port of the air supplementing pipe penetrates through the second closed cover plate;
the extraction device is structurally characterized in that an extraction inner pipe is arranged in the heat storage filler, the air inlet end of the extraction inner pipe is arranged in the heat storage filler, and the extraction end of the extraction inner pipe sequentially penetrates through the second closed cover plate and the first closed cover plate to be connected with an extraction fan.
5. The self-sustaining oxidation extraction system of in-situ thermal desorption tail gas for the soil remediation field according to any one of claims 1 to 4, wherein: the heat storage filler is made of mineral materials, silicate materials, metal materials or metal oxide materials; the mineral material is cobblestone, yellow sand or broken stone; the silicate material is quartz sand, glass particles, asbestos fiber material, porous ceramic material or granular ceramic material; the metal material is a metal wire mesh or metal particles; the metal oxide material is magnesium oxide or magnesia.
6. The self-sustaining oxidation extraction system of in-situ thermal desorption tail gas for the soil remediation field according to any one of claims 1 to 4, wherein: the heating rod is an electric heating rod, a hot gas heating rod, a heat conducting oil pipe heating rod, a circulating air pipe heating rod or a heat pipe heating rod; the heating rod is arranged in the heat storage filler in a U shape.
7. The self-sustaining oxidation extraction system of in-situ thermal desorption tail gas for the soil remediation field according to any one of claims 1 to 4, wherein: the outer wall of the underground extraction pipe is wrapped with an insulating layer; the heat-insulating layer is made of glass fiber cotton, rock wool, aluminum silicate felt, aerogel felt, expanded perlite, micro-nano heat-insulating material, foamed cement or heat-insulating coating.
8. A self-sustaining oxidation extraction method of in-situ thermal desorption tail gas for the soil remediation field by using the self-sustaining oxidation extraction system of any one of claims 1 to 4, which is characterized by comprising the following steps:
step S1, installing a self-sustaining oxidation extraction system according to the concrete condition of the soil to be repaired, wherein the depth of the underground water level needs to be ensured to be deeper than the embedding depth of the underground extraction pipe;
step S2, turning on an extraction fan, extracting tail gas through an extraction device, and turning on a heating rod to heat the heat storage filler;
step S3, in the process that the heating rod heats the heat storage filler, the temperature sensor monitors the temperature change condition of the heat storage filler;
and step S4, when the temperature sensor detects that the temperature of the heat storage filler increases or the temperature further increases after the temperature reaches a constant temperature, the temperature of pollutants in the tail gas in the heat storage filler is increased enough for self-sustaining oxidation due to oxidation reaction, the heating of the heating rod is stopped, and the air supply pipe is opened.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114345916A (en) * | 2022-01-06 | 2022-04-15 | 中国科学院武汉岩土力学研究所 | Novel in-situ thermal evaporation displacement restoration test system for organic contaminated soil |
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| CN107952789A (en) * | 2017-11-14 | 2018-04-24 | 中国环境科学研究院 | Thermal desorption system, thermal desorption-oxidation repair system in situ and restorative procedure in situ |
| CN110523759A (en) * | 2019-08-01 | 2019-12-03 | 湖南恒凯环保科技投资有限公司 | Equipment for the thermal desorption reparation of organic polluted soil original position |
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| US20050111917A1 (en) * | 2000-04-14 | 2005-05-26 | Board Of Regents, The University Of Texas System | Vapor collection and treatment of off-gas from an in-situ thermal desorption soil remediation system |
| CN101021520A (en) * | 2007-03-23 | 2007-08-22 | 天津大学 | Soilgas phase extracting monitoring system device and monitoring method |
| CN107952789A (en) * | 2017-11-14 | 2018-04-24 | 中国环境科学研究院 | Thermal desorption system, thermal desorption-oxidation repair system in situ and restorative procedure in situ |
| CN110523759A (en) * | 2019-08-01 | 2019-12-03 | 湖南恒凯环保科技投资有限公司 | Equipment for the thermal desorption reparation of organic polluted soil original position |
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| CN114345916A (en) * | 2022-01-06 | 2022-04-15 | 中国科学院武汉岩土力学研究所 | Novel in-situ thermal evaporation displacement restoration test system for organic contaminated soil |
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