CN112958605A - Vapor extraction device with soil and groundwater remediation function - Google Patents

Vapor extraction device with soil and groundwater remediation function Download PDF

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Publication number
CN112958605A
CN112958605A CN202110373534.9A CN202110373534A CN112958605A CN 112958605 A CN112958605 A CN 112958605A CN 202110373534 A CN202110373534 A CN 202110373534A CN 112958605 A CN112958605 A CN 112958605A
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Prior art keywords
water
extraction
air
pipe
soil
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CN202110373534.9A
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Chinese (zh)
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郎洁
李冰
陈新
陈仁涛
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Shandong Fangjia Environmental Technology Co ltd
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Shandong Fangjia Environmental Technology Co ltd
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Publication of CN112958605A publication Critical patent/CN112958605A/en
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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
    • B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06—Contaminated groundwater or leachate

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Microbiology (AREA)
  • Biotechnology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Mycology (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Physical Water Treatments (AREA)

Abstract

The invention discloses a vapor extraction device with a soil and underground water remediation function, which comprises a biological ventilation system and a sewage treatment recharge system, wherein the biological ventilation system comprises a water storage tank, an air inlet fan, an infusion pump and an air injection pipe, the water inlet end of the infusion pump is connected with the water storage tank, the water outlet end of the infusion pump is connected into soil at the position where the air injection pipe is embedded through a pipeline, and the air inlet fan is connected to the air injection pipe through an air pipe; the sewage treatment recharge system comprises an extraction well, a sewage treatment system, an extraction pump and a water injection well; an extraction pipe is vertically arranged in the extraction well, the lower end of the extraction pipe extends into underground water, and adsorption filler for adsorbing organic pollutants and heavy metals is filled between the extraction pipe and the extraction well; the end of intaking of drawer pump is connected to the bottom of extraction pipe, goes out the water end and is connected to sewage treatment system, and the water purification after sewage treatment system handles leads to water piping connection to the water injection well. The invention has the advantages of good groundwater remediation effect, capability of avoiding secondary pollution and the like.

Description

Vapor extraction device with soil and groundwater remediation function
Technical Field
The invention relates to the technical field of groundwater remediation, in particular to a vapor extraction device with a soil and groundwater remediation function.
Background
Underground water is an indispensable material foundation for sustainable development of the economic society of China. The national water resource amount is 27940 hundred million m3Wherein the water resource amount of surface water is 19100 hundred million m 32/3 of total water resource, 8840 hundred million m of groundwater resource31/3 for the total water resource. In the current water structure in China, one end of a groundwater sink occupies 20% of the total water supply of the whole country, 70% of the water supply of drinking water, 40% of farmland irrigation water and 38% of industrial water, and the water structure cannot be changed in a short period. With the dramatic increase of population and the rapid development of economy and society, the problem of groundwater pollution in China is increasingly prominent, and the influence of groundwater pollution on the development of environment and economy is increasingly revealed.
The existing groundwater remediation device is mainly used for treating common organic pollutants in groundwater and remedying the common organic pollutants by injecting medicaments, so that secondary pollution is easily caused although the effect is obvious, and meanwhile, the influence of other pollutants in groundwater is difficult to eliminate.
Generally, however, both groundwater and soil are important components of the subsurface environment, and both are closely related. However, the prior art focuses on only repairing soil or only repairing groundwater, and few technologies perform both repairs simultaneously.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a multiple-effect vapor extraction device with groundwater restoration function, the treatment effect is good, can avoid secondary pollution.
In order to solve the technical problems, the invention adopts the following technical scheme:
a gas phase extraction device with soil and underground water restoration function comprises a biological ventilation system and a sewage treatment recharge system, wherein the biological ventilation system comprises a water storage tank for storing nutrient solution, an air inlet fan for conveying air, an infusion pump for pumping the nutrient solution and an air injection pipe buried in soil, the water inlet end of the infusion pump is connected with the water storage tank, the water outlet end of the infusion pump is connected into the soil at the position where the air injection pipe is buried through a pipeline, the air inlet fan is connected to the air injection pipe through an air pipe, the air pipe is provided with an air injection system, and a heat exchanger is arranged between the air injection system and the air inlet fan; the sewage treatment recharge system comprises an extraction well communicated with underground water, a sewage treatment system for treating sewage, an extraction pump for pumping sewage and a water injection well communicated with the underground water; an extraction pipe is vertically arranged in the extraction well, the lower end of the extraction pipe extends into underground water, and an adsorption filler for adsorbing organic pollutants and heavy metals is filled between the extraction pipe and the extraction well; the water inlet end of the drawer pump is connected to the bottom of the extraction pipe, the water outlet end of the drawer pump is connected to the sewage treatment system, and purified water treated by the sewage treatment system is connected to the water injection well through a water pipe.
By adopting the system, the nutrient solution in the water storage tank is conveyed into the soil at the position where the gas injection pipe is embedded through the infusion pump to supply indigenous microorganisms, and meanwhile, the air inlet fan conveys air to the gas injection pipe through a pipeline to supply oxygen for the indigenous microorganisms in the soil at the position where the gas injection pipe is embedded, so that organic pollutants are removed by the microorganisms in the soil at an accelerated speed. In addition, after the underground water passes through the adsorption filler filled between the extraction pipe and the extraction well, most of organic pollutants and heavy metals can be removed, then the underground water is pumped to a sewage treatment system through an extraction pump, and the underground water is reinjected to the underground water through a water injection well after the underground water is treated to reach the standard. The device can restore soil and groundwater, and repair effect is good, and can avoid secondary pollution.
Further, the gas-phase extraction device also comprises an air extraction system, a gas-liquid separator and a concrete layer, wherein the air extraction system comprises an air extraction pipe and an air extraction pump which are buried in the soil, the air inlet end of the air extraction pump is connected to the air extraction pipe through an air pipe, and the air outlet end of the air extraction pump is connected to the air inlet end of the gas-liquid separator through an air pipe; the outlet pipe of the gas-liquid separator is connected to the sewage treatment system, the concrete layer covers the top of the soil, and the whole surface/part of the concrete layer is covered with a sealing film.
Therefore, the air in the soil is pumped out through the air pumping system, so that fresh air can be better injected into the air injection pipe, and the removal of organic pollutants by soil microorganisms can be further accelerated.
Further, the gas phase extraction device further comprises a tail gas treatment system, the tail gas treatment system comprises an air exhaust fan connected to the air outlet end of the gas-liquid separator, and the air outlet end of the air exhaust fan is connected with a tail gas treatment device chimney through a pipeline.
Therefore, the gas pumped out by the air pumping system is treated by the tail gas treatment system, and secondary pollution can be avoided.
Further, the tail gas treatment system still includes active carbon adsorption jar and draught fan, the end of giving vent to anger of air exhaust fan is connected to through the pipe connection active carbon adsorption jar, the end of giving vent to anger of active carbon adsorption jar is connected to the inlet end of draught fan, the end of giving vent to anger of draught fan is connected to the tail gas treatment chimney.
Further, sewage treatment recharge system still includes that the water injection of transversely burying underground in soil is violently managed and the working shaft, the water injection is violently managed and is had the water injection hole that sets up along length direction equipartition, the water purification after sewage treatment system handles leads to pipe and is connected to the working shaft, the play water end of working shaft is connected to respectively through the pipeline violently managing and the water injection well of water injection.
Furthermore, the gas phase extraction device also comprises a monitoring and control system, which comprises a settlement observation system for observing ground settlement, an automatic gas monitoring system for monitoring the gas concentration in the soil and the temperature and humidity of the soil, and a control system for controlling the operation of the biological ventilation system and the sewage treatment recharging system; the automatic gas monitoring system comprises a gas sensor and a temperature and humidity sensor which are buried in soil.
Furthermore, the extraction pipe comprises a main pipe body vertically arranged in the extraction well, the lower end of the main pipe body is a water permeable section provided with water passing holes, and the water passing holes are densely distributed on the water passing section; the bottom of the water passing section is hermetically provided with a sealing plate, and the upper end of the water passing section is lower than the liquid level of underground water.
Like this, because the bottom of crossing the water section is provided with the shrouding for groundwater can only get into from crossing the water hole and be responsible for internally through adsorbing the filler, can enough guarantee the water yield, can fully filter the groundwater that gets into and be responsible for the body again.
Furthermore, the adsorption filler is filled between the water passing section and the well wall of the extraction well, and tamped clay is filled between the main pipe body and the well wall of the extraction well.
Furthermore, the outside of the water passing section is coated with a geotechnical filter screen.
Further, the adsorption filler comprises one or two of biochar or nano zero-valent iron, and one or two of quartz sand or zeolite; the extraction pipe is an HDPE pipe, and the pipe diameter is 150-200 mm; the diameter of crossing the water hole is 6 ~ 10mm, and adjacent two in circumference cross the central angle that the water hole corresponds and be 45 ~ 60.
In conclusion, the invention has the advantages of good groundwater remediation effect, capability of avoiding secondary pollution and the like.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of the structure of the extraction well portion of fig. 1.
Fig. 3 is a schematic cross-sectional view of a-a in fig. 2.
Detailed Description
The present invention will be described in further detail with reference to examples.
In the specific implementation: as shown in fig. 1 to 3, a gas phase extraction apparatus with soil and groundwater remediation function comprises a biological ventilation system 1 and a sewage treatment recharge system 2, wherein the biological ventilation system 1 comprises a water storage tank 11 for storing nutrient solution, an air inlet fan 12 for delivering air, an infusion pump 13 for pumping nutrient solution (C: N: P mass ratio is preferably 100:5:1), and an air injection pipe 14 buried in soil S1, the infusion pump 13 has a water inlet connected to the water storage tank 11, a water outlet connected to the soil S2 where the air injection pipe 14 is buried by a pipeline, the air inlet fan 12 is connected to the air injection pipe 14 by an air pipe 121, an air injection system 122 is provided on the air pipe 121, a heat exchanger (not shown) is provided between the air injection system 122 and the air inlet fan 12, so that the temperature of the air output from the air inlet fan 12 can be adjusted by the heat exchanger, for example, the air output from the air inlet fan 12 is heated and then flows into the air injection pipe 14 to enhance the repairing effect; the sewage treatment recharge system 2 comprises an extraction well 21 communicated with underground water, a sewage treatment system 22 for treating sewage, an extraction pump 23 for pumping sewage and a water injection well 26 communicated with the underground water; an extraction pipe 24 is vertically arranged in the extraction well 21, the lower end of the extraction pipe 22 extends into underground water S1, and an adsorption filler 25 for adsorbing organic pollutants and heavy metals is filled between the extraction pipe 24 and the extraction well 21; the water inlet end of the drawer pump 23 is connected to the bottom of the extraction pipe 24, the water outlet end of the drawer pump is connected to the sewage treatment system 22, and purified water treated by the sewage treatment system 22 is connected to the water injection well 26 through a water pipe.
By adopting the system, the nutrient solution in the water storage tank is conveyed into the soil at the position where the gas injection pipe is embedded through the infusion pump to supply indigenous microorganisms, and meanwhile, the air inlet fan conveys air to the gas injection pipe through a pipeline to supply oxygen for the indigenous microorganisms in the soil at the position where the gas injection pipe is embedded, so that organic pollutants are removed by the microorganisms in the soil at an accelerated speed. In addition, after the underground water passes through the adsorption filler filled between the extraction pipe and the extraction well, most of organic pollutants and heavy metals can be removed, then the underground water is pumped to a sewage treatment system through an extraction pump, and the underground water is reinjected to the underground water through a water injection well after the underground water is treated to reach the standard. The device can restore soil and groundwater, and repair effect is good, and can avoid secondary pollution.
In implementation, the vapor extraction device further comprises an air extraction system 3 and a gas-liquid separator 4, the air extraction system 3 comprises an air extraction pipe 31 and an air extraction pump 32 buried in soil, an air inlet end of the air extraction pump 32 is connected to the air extraction pipe 31 through an air pipe, and an air outlet end of the air extraction pump is connected to an air inlet end of the gas-liquid separator 4 through an air pipe; the water outlet pipe of the gas-liquid separator 4 is connected to the sewage treatment system 22.
Therefore, the air in the soil is pumped out through the air pumping system, so that fresh air can be better injected into the air injection pipe, and the removal of organic pollutants by soil microorganisms can be further accelerated.
In practice, the vapor extraction device further comprises a concrete layer 100 covering the top of the soil S2, and the surface of the concrete layer 100 is completely/partially covered with a sealing film 200, preferably, the sealing film 200 is a HDPE film, so that the concrete layer 100 can play a role in heat insulation and sealing to further improve the repairing effect and efficiency, and the sealing film can play a role in seepage prevention.
In implementation, the vapor phase extraction device further comprises a tail gas treatment system 5, wherein the tail gas treatment system 5 comprises an air exhaust fan 51 connected to the air outlet end of the gas-liquid separator 4, and the air outlet end of the air exhaust fan 51 is connected with a tail gas treatment device chimney 52 through a pipeline.
Therefore, the gas pumped out by the air pumping system is treated by the tail gas treatment system, and secondary pollution can be avoided.
During the implementation, tail gas processing system 5 still includes activated carbon adsorption tank 53 and draught fan 54, the end of giving vent to anger of air exhaust fan 51 is connected to through the pipeline activated carbon adsorption tank 53, activated carbon adsorption tank 53's the end of giving vent to anger is connected to the inlet end of draught fan 54, the end of giving vent to anger of draught fan 54 is connected to tail gas treatment chimney 52.
When in implementation, the sewage treatment recharge system 2 further comprises a horizontal water injection pipe 27 and a water supply pump 28 which are transversely buried in soil, the horizontal water injection pipe 27 is provided with water injection holes uniformly distributed along the length direction, the purified water treated by the sewage treatment system 22 is connected to the water supply pump 28 through a water pipe, and the water outlet end of the water supply pump 28 is respectively connected to the horizontal water injection pipe 27 and the water injection well 26 through a pipeline.
During implementation, the gas phase extraction device further comprises a monitoring and control system 6, which comprises a settlement observation system 61 for observing ground settlement, an automatic gas monitoring system 62 for monitoring the gas concentration in the soil and the temperature and humidity of the soil, and a control system 63 for controlling the operation of the biological ventilation system 1 and the sewage treatment recharging system 2; the automatic gas monitoring system 62 includes a gas sensor and a temperature and humidity sensor buried in the soil.
In implementation, the extraction pipe 24 includes a main pipe 241 vertically disposed in the extraction well 21, the lower end of the main pipe 241 is a water permeable section 242 with water passing holes densely disposed on the water passing section 242; the bottom of the water passing section 242 is hermetically provided with a sealing plate, and the upper end of the water passing section is lower than the liquid level of underground water.
Like this, because the bottom of crossing the water section is provided with the shrouding for groundwater can only get into from crossing the water hole and be responsible for internally through adsorbing the filler, can enough guarantee the water yield, can fully filter the groundwater that gets into and be responsible for the body again.
In practice, the adsorption filler 25 is filled between the water passing section 242 and the wall of the extraction well 21, and the tamped clay is filled between the main pipe 241 and the wall of the extraction well 21.
In practice, the water passing section 242 is covered with a geotechnical filter screen 29 with a specification of 200g/m2。
In practice, the adsorption filler 25 comprises one or two of biochar or nano zero-valent iron and comprises one or two of quartz sand or zeolite, so that when the repair function is performed through the biochar or the nano zero-valent iron, the water through holes of the extraction pipe 24 can be prevented from being blocked by the biochar or the nano zero-valent iron through the quartz sand or the zeolite; the extraction pipe 24 is an HDPE pipe, and the pipe diameter is 150-200 mm; the diameter of crossing the water hole is 6 ~ 10mm, and adjacent two in circumference cross the central angle that the water hole corresponds and be 45 ~ 60.
The above description is only exemplary of the present invention and should not be taken as limiting, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The gas phase extraction device with the soil and underground water remediation function is characterized by comprising a biological ventilation system (1) and a sewage treatment recharging system (2), wherein the biological ventilation system (1) comprises a water storage tank (11) for storing nutrient solution, an air inlet fan (12) for conveying air, an infusion pump (13) for pumping the nutrient solution and an air injection pipe (14) buried in soil, the water inlet end of the infusion pump (13) is connected with the water storage tank (11), the water outlet end of the infusion pump is connected into the soil at the position where the air injection pipe (14) is buried through a pipeline, the air inlet fan (12) is connected to the air injection pipe (14) through an air pipe (121), the air pipe (121) is provided with an air injection system (122), and a heat exchanger is arranged between the air injection system (122) and the air inlet fan (12); the sewage treatment recharge system (2) comprises an extraction well (21) communicated with underground water, a sewage treatment system (22) for treating sewage, an extraction pump (23) for pumping sewage and a water injection well (26) communicated with the underground water; an extraction pipe (24) is vertically arranged in the extraction well (21), the lower end of the extraction pipe (22) extends into underground water, and an adsorption filler (25) for adsorbing organic pollutants and heavy metals is filled between the extraction pipe (24) and the extraction well (21); the water inlet end of the drawer pump (23) is connected to the bottom of the extraction pipe (24), the water outlet end of the drawer pump is connected to the sewage treatment system (22), and purified water treated by the sewage treatment system (22) is connected to the water injection well (26) through a water pipe.
2. The vapor extraction apparatus according to claim 1, further comprising an air extraction system (3), a gas-liquid separator (4) and a concrete layer (100), wherein the air extraction system (3) comprises an air extraction pipe (31) and an air extraction pump (32) buried in soil, an air inlet end of the air extraction pump (32) is connected to the air extraction pipe (31) through an air pipe, and an air outlet end of the air extraction pump is connected to an air inlet end of the gas-liquid separator (4) through an air pipe; the outlet pipe of vapour and liquid separator (4) is connected to sewage treatment system (22), concrete layer (100) cover at soil top, just concrete layer (100) surface is whole/partial to be covered with seal membrane (200).
3. The vapor extraction apparatus according to claim 2, further comprising a tail gas treatment system (5), wherein the tail gas treatment system (5) comprises an air exhaust fan (51) connected to the air outlet end of the gas-liquid separator (4), and the air outlet end of the air exhaust fan (51) is connected to a tail gas treatment apparatus chimney (52) through a pipeline.
4. The vapor phase extraction apparatus according to claim 3, wherein the tail gas treatment system (5) further comprises an activated carbon adsorption tank (53) and an induced draft fan (54), the air outlet end of the induced draft fan (51) is connected to the activated carbon adsorption tank (53) through a pipeline, the air outlet end of the activated carbon adsorption tank (53) is connected to the air inlet end of the induced draft fan (54), and the air outlet end of the induced draft fan (54) is connected to the tail gas treatment chimney (52).
5. The vapor phase extraction device according to claim 1, wherein the sewage treatment recharge system (2) further comprises a horizontal water injection pipe (27) and a water supply pump (28) which are transversely buried in the soil, the horizontal water injection pipe (27) is provided with water injection holes which are uniformly distributed along the length direction, the purified water treated by the sewage treatment system (22) is connected to the water supply pump (28) through a water pipe, and the water outlet end of the water supply pump (28) is respectively connected to the horizontal water injection pipe (27) and the water injection well (26) through pipelines.
6. The vapor extraction apparatus according to claim 1, further comprising a monitoring and control system (6) including a settlement observation system (61) for observing ground settlement, an automatic gas monitoring system (62) for monitoring gas concentration in soil and temperature and humidity of soil, and a control system (63) for controlling the operation of the biological ventilation system (1) and the sewage treatment recharge system (2); the automatic gas monitoring system (62) comprises a gas sensor and a temperature and humidity sensor which are buried in soil.
7. The vapor phase extraction apparatus according to claim 1, wherein the extraction pipe (24) comprises a main pipe body (241) vertically arranged in the extraction well (21), the lower end of the main pipe body (241) is a water passing section (242) provided with water passing holes, and the water passing holes are densely arranged on the water passing section (242); the bottom of the water passing section (242) is hermetically provided with a sealing plate, and the upper end of the water passing section is lower than the liquid level of underground water.
8. The vapor extraction apparatus according to claim 7, wherein the adsorptive filler (25) is filled between the water passing section (242) and the wall of the extraction well (21), and the tamped clay is filled between the main pipe body (241) and the wall of the extraction well (21).
9. The vapor extraction apparatus of claim 7, wherein the water passage section (242) is externally covered with a geotextile screen (29).
10. The vapor extraction apparatus of claim 9, wherein the adsorbent packing (25) comprises one or both of biochar or nano zero valent iron, and one or both of quartz sand or zeolite; the extraction pipe (24) is an HDPE pipe, and the pipe diameter is 150-200 mm; the diameter of crossing the water hole is 6 ~ 10mm, and adjacent two in circumference cross the central angle that the water hole corresponds and be 45 ~ 60.
CN202110373534.9A 2021-04-07 2021-04-07 Vapor extraction device with soil and groundwater remediation function Withdrawn CN112958605A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110373534.9A CN112958605A (en) 2021-04-07 2021-04-07 Vapor extraction device with soil and groundwater remediation function

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Application Number Priority Date Filing Date Title
CN202110373534.9A CN112958605A (en) 2021-04-07 2021-04-07 Vapor extraction device with soil and groundwater remediation function

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CN112958605A true CN112958605A (en) 2021-06-15

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CN202110373534.9A Withdrawn CN112958605A (en) 2021-04-07 2021-04-07 Vapor extraction device with soil and groundwater remediation function

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3137853A1 (en) * 2022-07-13 2024-01-19 Eiffage Gc Infra Lineaires Mobile soil decontamination device.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3137853A1 (en) * 2022-07-13 2024-01-19 Eiffage Gc Infra Lineaires Mobile soil decontamination device.

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