CN208341357U - Contaminated soil in-situ radio-frequency heats gas phase and extracts prosthetic device - Google Patents
Contaminated soil in-situ radio-frequency heats gas phase and extracts prosthetic device Download PDFInfo
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- CN208341357U CN208341357U CN201820252533.2U CN201820252533U CN208341357U CN 208341357 U CN208341357 U CN 208341357U CN 201820252533 U CN201820252533 U CN 201820252533U CN 208341357 U CN208341357 U CN 208341357U
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Abstract
The utility model provides a kind of contaminated soil in-situ radio-frequency heating gas phase extracting prosthetic device, it is characterized in that, it include: in-situ radio-frequency heating device, polluted gas vacuum extraction device and gas cleaning plant, in-situ radio-frequency heating devices heat contaminated soil, the gas that polluted gas vacuum extraction device extraction stain soil generates, the gas extracted enters gas cleaning plant, wherein, in-situ radio-frequency heating device includes radiofrequency launcher and electrode, electrode includes anode, cathode and grid, four cathodes and two grids are distributed on six vertex of regular hexagon, anode distribution is in the inside of regular hexagon.The utility model uses radio frequency heating gas phase extraction technique, while with biological prosthetic and chemical oxidation remediation intensification radio frequency heating extraction technique, has many advantages, such as that remediation efficiency is high, compact-sized, saving energy consumption.
Description
Technical field
The utility model belongs to technical field of soil remediation more particularly to a kind of contaminated soil in-situ radio-frequency heating gas phase is taken out
Mention prosthetic device.
Background technique
Soil be the foundation of plant growth and the important component of ecological environment and it is for the survival of mankind it is important from
Right resource.With the quickening of urbanization speed, a large amount of industrial pollution enterprises removes, since " evaporating, emitting, dripping or leaking of liquid or gas " in production activity is existing
As the contaminated site left usually contains a large amount of volatile organic contaminant (VOCs) and half volatile organic contaminant
(SVOCs).For example, the polycyclic aromatic hydrocarbon of chemical enterprise emission, organohalogen compounds, Polychlorinated biphenyls and organic agricultural chemicals etc., petroleum industry
Enterprise forms the organic matters such as gasoline, diesel oil to soil due to petroleum pipeline rupture, oil storage tank leakage and gas station's resettlement etc.
Pollution.These pollutants have the characteristics that carcinogenic, teratogenesis, mutagenic more, can by directly contacting, the approach such as food chain jeopardize people
Class life and health safety.Therefore, organic pollution of soil problem has caused extensive concern both domestic and external and attention.
Currently, the recovery technique of organic polluted soil includes peripheral doses, chemical remediation, biological prosthetic etc., wherein soil
Gas phase extracting SVE (Soil Vapor Extraction) technology belongs to peripheral doses scope, which is generated using vacuum equipment
Negative pressure drives volatile organic matter and semi-volatile organic matter to enter extraction pipe by soil aperture, after final extracting to earth's surface
It is collected processing.Gas phase extraction technique is at low cost with its, strong operability, does not destroy soil texture and does not cause secondary pollution
The advantages that be widely used.But in actual application, traditional gas phase extraction technique by soil permeability, the soil moisture and
The influence of the factors such as stripping gas flow and flow velocity, causes remediation efficiency low, repairing effect not can guarantee.
For the repairing effect for improving SVE technology, a variety of SVE heat enhancing technologies have obtained research and development.Heat treatment technics
Including resistance heating, hot-air/steam heating, heat transfer heating, radio frequency heating etc..Radio frequency heating (Radio Frequency
Heating, RFH) technology using high frequency voltage generate electromagnetic wave to contaminated soil heat, the soil moisture usually can be improved extremely
250℃-400℃.On the one hand volatilization and the desorption rate of volatile organic matter can be improved in the technology, part on the other hand can be improved
Higher semi-volatile organic matter of boiling point etc. is difficult to extract the repairing effect of the organic pollutant of removal with normal-temperature vacuum.
Bio- ventilation technology obtains pollutant by injecting air or oxygen into soil, by the aerobic activity of microorganism
To degradation, pollutant removal can be strengthened by the method for injection hot-air, nutrient solution, external source high-effect bacterial.It is former
Position chemical oxidation techniques refer to that injecting chemical agent into soil by original position makes it that chemical reaction occur to real with pollutant
The purpose of existing pollutant removal purification, the technology can handle multiple pollutant simultaneously, and treatment effeciency is high.
However, it still needs further improvement for the efficiency that the efficiency and gas of soil heating extract in existing technology.
Utility model content
The purpose of this utility model is that: overcome that existing gas phase extraction technique remediation efficiency is low, repairing effect not can guarantee
Deng defect.
To achieve the above object, the utility model adopts the technical scheme that
A kind of contaminated soil in-situ radio-frequency heating gas phase extracting prosthetic device characterized by comprising in-situ radio-frequency heating
Device, polluted gas vacuum extraction device and gas cleaning plant, in-situ radio-frequency heating devices heat contaminated soil, contamination gas
The gas that body vacuum extraction device extraction stain soil generates, the gas extracted enter gas cleaning plant, wherein in situ
Radio frequency heating apparatus includes radiofrequency launcher and electrode, and electrode includes anode, cathode and grid, four cathodes and two grids
It is distributed on six vertex of regular hexagon, anode distribution is in the inside of regular hexagon.
Further, the contaminated soil in-situ radio-frequency heating gas phase of the utility model extracts prosthetic device, also has such
Feature: where there are three anodes, is evenly distributed on the longest diagonal line of regular hexagon.
Further, the contaminated soil in-situ radio-frequency heating gas phase of the utility model extracts prosthetic device, also has such
Feature: anode separates coaxial cable by radio-frequency signal generator and is connected respectively with anode using being connected in parallel, and grid uses series system
It is connected to the circuit receiving end of radio-frequency signal generator.
Further, the contaminated soil in-situ radio-frequency heating gas phase of the utility model extracts prosthetic device, also has such
Feature: where polluted gas vacuum extraction device includes extraction well, extraction pipe, air pipeline and vacuum pump, in extraction well
Extraction pipe is connected by air pipeline with vacuum pump inlet, and vacuum pump outlet is connected with gas cleaning plant.
Further, the contaminated soil in-situ radio-frequency heating gas phase of the utility model extracts prosthetic device, also has such
Feature: where the quantity of extraction well is seven, one of them is located on the central point of regular hexagon, and remaining six are uniformly distributed
On first circumference concentric with the central point of regular hexagon, the first circumference is located at the inside of regular hexagon, and anode is located at first
The inside of circumference.
Further, the contaminated soil in-situ radio-frequency heating gas phase of the utility model extracts prosthetic device, also has such
Feature, further includes:
Injection well, quantity are six, are evenly distributed on the second circumference concentric with the central point of regular hexagon, the second circle
Radius of the radius in week less than the first circumference.
Further, the contaminated soil in-situ radio-frequency heating gas phase of the utility model extracts prosthetic device, also has such
Feature, further includes: reagent injection device；Reagent injection device include sequentially connected reagent storage box, flowmeter, force (forcing) pump with
And flow in pipes, flow in pipes are connected with injection well, reagent storage box stores nutrient solution or chemical agent.
Further, the contaminated soil in-situ radio-frequency heating gas phase of the utility model extracts prosthetic device, also has such
Feature: it is laid with sieve pore on extraction pipe and flow in pipes, permeability filler is furnished with around pipeline outer wall.
Further, the contaminated soil in-situ radio-frequency heating gas phase of the utility model extracts prosthetic device, also has such
Feature: where gas cleaning plant includes sequentially connected condenser, gas-liquid separator, alkali liquid washing tower, activated carbon adsorption bed
And exhaust blower.
Further, the contaminated soil in-situ radio-frequency heating gas phase of the utility model extracts prosthetic device, also has such
Feature, further includes: the top of contaminated soil is arranged in concrete isolation layer.
The beneficial effects of the utility model are as follows:
The utility model provides a kind of contaminated soil in-situ radio-frequency heating gas phase extracting prosthetic device, overcomes existing gas phase
The defect that extraction technique remediation efficiency is low, repairing effect not can guarantee etc., can be engineered suitable for middle-size and small-size contaminated site.The skill
Art is influenced smaller by the permeability and heat conductivity of soil, can effectively improve the migration of organic pollutant to realize pollutant
Quickly removal, meanwhile, which will not inhibit the activity of edaphon, and the underground condition after radio frequency heating is conducive to remain
The biodegrade of pollutant is realized that contaminated soil is quickly repaired, is had by providing suitable survival temperature for indigenous microorganism
Remediation efficiency is high, it is compact-sized, save the advantages that energy consumption.
Further the utility model by improve the arrangement and injection well of cathode, anode and grid and extract into
Distribution mode, further improve soil heating and gas extracting efficiency.
Detailed description of the invention
Fig. 1 be the utility model in-situ radio-frequency heating gas phase extraction device overlooking structure diagram, that is, heat electrode,
The arranged distribution figure of extraction well and injection well.
Fig. 2 is the structural schematic diagram of the utility model in-situ radio-frequency heating gas phase extraction device.
Specific embodiment
Illustrate specific embodiment of the present utility model below in conjunction with attached drawing.
As depicted in figs. 1 and 2, contaminated soil in-situ radio-frequency heating gas phase extracts prosthetic device, comprising: in-situ radio-frequency heating
Device, polluted gas vacuum extraction device, gas cleaning plant and reagent injection device.
In-situ radio-frequency heating device: contaminated soil is heated.
Polluted gas vacuum extraction device: vacuum extraction is carried out to polluted gas, the polluted gas extracted enters gas
Body purification device.
Gas cleaning plant: discharge after the polluted gas processing that extracting is obtained is up to standard.
Reagent injection device: can choose injection nutrient solution, reinforce microbial degradation efficiency, strengthens in-situ radio-frequency heating and repairs
Multiple effect, improves remediation efficiency.Also chemical agent can be injected, degradation radio frequency heating gas phase extracting handles incomplete organic dirt
Object is contaminated, while the content of polar molecule in contaminated soil can be increased, to improve the efficiency of radio frequency heating, the final soil that improves is repaired
Multiple efficiency.
As depicted in figs. 1 and 2, the specific structure of each section is as follows:
In-situ radio-frequency heating device: including radio-frequency signal generator 110 and electrode.Electrode is respectively as follows: anode 120,130 and of cathode
Grid 131.Between electrode between electrode and radio-frequency signal generator connection coaxial cable 140, radio-frequency signal generator 110 is by penetrating
Frequency wave direction contaminated soil radiations heat energy.
Wherein, anode 120 is using being connected in parallel, by radio-frequency signal generator 110 separate coaxial cable 140 respectively with anode 120
It is connected, cathode 130 and grid 131 are connected to the circuit receiving end of radio-frequency signal generator 110 using series system.
Polluted gas vacuum extraction device: including extraction well 210, air pipeline 220 and vacuum pump 240.Wherein, ventilation duct
Road is equipped with valve 230, and the extraction pipe in extraction well 210 is connected by air pipeline 220 with 240 entrance of vacuum pump, vacuum
240 outlet of pump is connected with gas cleaning plant.
Gas cleaning plant: including sequentially connected condenser 310, gas-liquid separator 320, alkali liquid washing tower 330, activity
Charcoal adsorbent bed 340 and exhaust blower 350, polluted gas sequentially enter purification device eventually by 350 qualified discharge of exhaust blower.Gas-liquid
Liquid in separator 320 enters in storage tank 322 via liquid pump 321.
Reagent injection device: including sequentially connected reagent storage box 410, flowmeter 420, force (forcing) pump 430, flow in pipes
450 and injection well 460, wherein flow in pipes 450 is equipped with valve 440, and reagent flow meter 420 measures, and passes through force (forcing) pump 430
Pressurization, and be injected into contaminated soil by flow in pipes 450 and injection well 460.
Insulating layer is laid outside air pipeline 220；Air/oxygen injection shares the same injection with medicament/nutrient solution injection
Well 460, and 460 interior conduit of injection well is porous fabrics pipeline, permeability filler is furnished with around tube wall, by air/oxygen or medicine
Agent/nutrient solution is reasonably and uniformly deployed in contaminated soil.
Anode 120, cathode 130 and grid 131 are all made of copper pipe, and electrode is directly contacted with contaminated soil, coaxial cable 140
Insulating layer is wrapped up outside, and is shielded with aluminium case.
Four cathodes 130 and two grids 131 are arranged using regular hexagon, are arranged in six points of regular hexagon
On.Three anodes 120, are equably distributed parallelly on the longest diagonal line of above-mentioned regular hexagon.Four cathodes and two grids
Distribution mode be four adjacent cathodes in the present embodiment, then two adjacent grids, in other embodiments
In, it may be set to be other neighbouring relations.
The quantity of extraction well 210 is seven, one of them is located on the central point of regular hexagon, and remaining six are uniformly distributed
On first circumference 101 concentric with the central point of regular hexagon, the first circumference 101 is located at the inside of regular hexagon.Three sun
Pole 120 is located at the inside of the first circumference 101.
The quantity of injection well 460 is six, is evenly distributed on second circumference 102 concentric with the central point of regular hexagon
On, the second circumference 102 is located at the inside of the first circumference 101.
It is laid with sieve pore on extraction pipe and flow in pipes, the permeabilities filler such as sandstone is furnished with around pipeline outer wall.
The part of flow in pipes and extraction pipe and ground face contact is sealed design.
Concrete isolation layer 10 is set above contaminated soil, and isolation layer can reduce distributing for Heat in Soil amount, prevent dirt
Dye gas is dispersed into atmosphere, while extraction well being avoided to be extracted into extraneous air.
The working principle that contaminated soil in-situ radio-frequency heats gas phase extraction device is as follows: in-situ radio-frequency heating device is to pollution
Soil is heated；Polluted gas vacuum extraction device is stripped polluted gas, and the polluted gas extracted passes through true
Sky pump enters gas cleaning plant；The polluted gas that gas cleaning plant first obtains extracting condenses, gas after condensation
Liquid mixture enters gas-liquid separator and is separated, and isolated liquid phase enters liquid handling device and handled, and separates
To gas phase enter alkali liquid washing tower, using alkali liquid washing tower to the SO in vapor phase contaminants2, the harmful exhausts such as HCl are washed
Processing is washed, subsequently into qualified discharge after active carbon adsorber processing；Reagent injection device reinforces micro- life by injection nutrient solution
Object degradation efficiency strengthens in-situ radio-frequency and heats repair, improves remediation efficiency, and by injecting chemical agent, degradation is in situ to be penetrated
Frequency heats incomplete organic pollutant, while promoting radiothermics heating efficiency, to further increase reparation
Efficiency.Wherein, the nutrient solution in reagent injection device can provide the battalion lacked during Soil Microorganism degradation of organic substances
Substance, microelement etc. are supported, while the activity of microorganism can be excited, promotes the degradation efficiency of microorganism；Chemical agent is peroxide
Change the oxidants such as hydrogen, permanganate, it is incomplete organic by the degradable radio frequency heating gas phase extracting processing of injection chemical agent
Pollutant can increase simultaneously the content of polar molecule in contaminated soil, to improve the efficiency of radio frequency heating, finally improve soil
Remediation efficiency.The utility model by improve the arrangement and injection well of cathode, anode and grid and extract into distribution
Mode further improves the efficiency of soil heating and gas extracting.
Claims (10)
1. a kind of contaminated soil in-situ radio-frequency heating gas phase extracts prosthetic device characterized by comprising
In-situ radio-frequency heating device, polluted gas vacuum extraction device and gas cleaning plant,
In-situ radio-frequency heating devices heat contaminated soil, the gas that polluted gas vacuum extraction device extraction stain soil generates,
The gas extracted enters gas cleaning plant,
Wherein, the in-situ radio-frequency heating device includes radiofrequency launcher and electrode, and electrode includes anode, cathode and grid,
Four cathodes and two grids are distributed on six vertex of regular hexagon, and anode distribution is in the inside of regular hexagon.
2. contaminated soil in-situ radio-frequency heating gas phase as described in claim 1 extracts prosthetic device, it is characterised in that:
Wherein, it there are three the anodes, is evenly distributed on the longest diagonal line of regular hexagon.
3. contaminated soil in-situ radio-frequency heating gas phase as described in claim 1 extracts prosthetic device, it is characterised in that:
Anode separates coaxial cable by radio-frequency signal generator and is connected respectively with anode using being connected in parallel, and grid uses series system
It is connected to the circuit receiving end of radio-frequency signal generator.
4. contaminated soil in-situ radio-frequency heating gas phase as described in claim 1 extracts prosthetic device, it is characterised in that:
Wherein, the polluted gas vacuum extraction device includes extraction well, extraction pipe, air pipeline and vacuum pump, extraction well
Interior extraction pipe is connected by air pipeline with vacuum pump inlet, and vacuum pump outlet is connected with gas cleaning plant.
5. contaminated soil in-situ radio-frequency heating gas phase as claimed in claim 4 extracts prosthetic device, it is characterised in that:
Wherein, the quantity of extraction well is seven, one of them is located on the central point of regular hexagon, and remaining six are evenly distributed on
On the first circumference concentric with the central point of regular hexagon, first circumference is located at the inside of regular hexagon, the anode position
In the inside of first circumference.
6. contaminated soil in-situ radio-frequency heating gas phase as claimed in claim 5 extracts prosthetic device, which is characterized in that also wrap
It includes:
Injection well, quantity are six, are evenly distributed on the second circumference concentric with the central point of regular hexagon, second circle
The radius in week is less than the radius of first circumference.
7. contaminated soil in-situ radio-frequency heating gas phase as claimed in claim 6 extracts prosthetic device, which is characterized in that also wrap
It includes: reagent injection device；
The reagent injection device includes sequentially connected reagent storage box, flowmeter, force (forcing) pump and flow in pipes, injection pipe
Road is connected with injection well, and reagent storage box stores nutrient solution or chemical agent.
8. contaminated soil in-situ radio-frequency heating gas phase as claimed in claim 7 extracts prosthetic device, it is characterised in that:
It is laid with sieve pore on extraction pipe and flow in pipes, permeability filler is furnished with around pipeline outer wall.
9. contaminated soil in-situ radio-frequency heating gas phase as described in claim 1 extracts prosthetic device, it is characterised in that:
Wherein, the gas cleaning plant includes sequentially connected condenser, gas-liquid separator, alkali liquid washing tower, active carbon suction
Attached bed and exhaust blower.
10. contaminated soil in-situ radio-frequency heating gas phase as in one of claimed in any of claims 1 to 9 extracts prosthetic device,
It is characterized in that, further includes:
The top of contaminated soil is arranged in concrete isolation layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820252533.2U CN208341357U (en) | 2018-02-12 | 2018-02-12 | Contaminated soil in-situ radio-frequency heats gas phase and extracts prosthetic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820252533.2U CN208341357U (en) | 2018-02-12 | 2018-02-12 | Contaminated soil in-situ radio-frequency heats gas phase and extracts prosthetic device |
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| CN208341357U true CN208341357U (en) | 2019-01-08 |
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| CN201820252533.2U Active CN208341357U (en) | 2018-02-12 | 2018-02-12 | Contaminated soil in-situ radio-frequency heats gas phase and extracts prosthetic device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110773558A (en) * | 2019-10-31 | 2020-02-11 | 生态环境部南京环境科学研究所 | Device and method for soil remediation and preventing pollutant diffusion |
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2018
- 2018-02-12 CN CN201820252533.2U patent/CN208341357U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110773558A (en) * | 2019-10-31 | 2020-02-11 | 生态环境部南京环境科学研究所 | Device and method for soil remediation and preventing pollutant diffusion |
| CN110773558B (en) * | 2019-10-31 | 2020-09-15 | 生态环境部南京环境科学研究所 | Device and method for soil remediation and preventing pollutant diffusion |
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