CN109127703A - A kind of contaminated soil in-situ remediation system and method - Google Patents
A kind of contaminated soil in-situ remediation system and method Download PDFInfo
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- CN109127703A CN109127703A CN201811278830.5A CN201811278830A CN109127703A CN 109127703 A CN109127703 A CN 109127703A CN 201811278830 A CN201811278830 A CN 201811278830A CN 109127703 A CN109127703 A CN 109127703A
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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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Abstract
The present invention relates to one kind to be directed to VOCs-contaminated Soils in-situ remediation system and method, belongs to contaminated soil Treatment process field；It solves in the prior art since the price repaired to contaminated soil using strange land is higher, and sometimes due to the technical issues of restriction effect of surrounding enviroment leads to not using strange land recovery technique.The in-situ remediation system includes assembled membrane structure, gas processing device, gas concentration detection apparatus and gas flow automatic control equipment；Heating equipment and first gas collection device are equipped in assembled membrane structure；Equipment for Heating Processing is successively connect with first gas collection device, gas processing device, gas concentration detection apparatus, gas flow automatic control equipment respectively；Gas concentration detection apparatus is used for the content of the volatile organic matter after detection processing；Gas flow automatic control equipment is connect with exhaust tube, and is equipped with the circulating line for leading to gas processing device.For repairing the contaminated soil on large- and-medium size cities periphery.
Description
Technical field
The present invention relates to contaminated soil Treatment process field more particularly to a kind of contaminated soil in-situ remediation system and sides
Method.
Background technique
Paces with fast development and the heavy industry reform of China's economic are accelerated, the contaminating enterprises in large- and-medium size cities suburb
It is numerous and confused to close, but the soil where it has been contaminated.Polluted Soil results in physics, mechanics, the chemical property hair of soil
Changing not only directly affects engineering activity, and human health, animal procreation, plant growth are also resulted in and seriously affected, therefore is right
The processing and reparation of contaminated soil just seem particularly significant.
Existing contaminated soil processing mode is broadly divided into in-situ treatment technology and showering technology.Common in-situ treatment
Technology includes the methods of physics, chemistry and biology, and showering technology includes excavating to handle disposal technology with dystopy.Due to city
Construction, the reasons such as population activity density is big, cause contaminated soil surrounding enviroment complicated, can only by the way of in-situ immobilization into
The processing of row Polluted Soil.But due to contaminated soil using strange land repair price it is higher, and sometimes due to surrounding enviroment limit
Production with lead to not apply strange land recovery technique.Therefore just seem very crucial using based technique for in-situ remediation.
Summary of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of system and method for in-situ immobilization contaminated soil, to solve
The technical issues of certainly factory on large- and-medium size cities periphery pollutes caused by soil in the prior art.
The purpose of the present invention is mainly achieved through the following technical solutions:
The present invention provides a kind of in-situ remediation systems for VOCs-contaminated Soils, including assembled film knot
Structure, gas processing device, gas concentration detection apparatus and gas flow automatic control equipment；It is equipped with and adds in assembled membrane structure
Hot equipment and first gas collection device；First gas collection device successively with gas processing device, gas concentration detection apparatus,
The connection of gas flow automatic control equipment；
Heating equipment is for heating contaminated soil, and gas processing device is for absorbing volatile organic matter；Gas concentration inspection
Content of the measurement equipment for volatile organic matter in mixed gas after detection processing；Gas flow automatic control equipment and exhaust tube
Connection, and it is equipped with the circulating line for leading to assembled membrane structure.
Further, assembled membrane structure is additionally provided with energy collection unit, energy collection unit be include being arranged in assembly
The piezoelectric energy collector of formula membrane structure inner surface, piezoelectric energy collector is for collecting the assembled film under wind load action
The energy that the film surface vibration of structure generates.
Further, heating equipment includes single head heating electrothermal tube, and contaminated soil 8 is inserted at the top that single head heats electrothermal tube
~12cm, heat treatment system accelerate volatile organic contaminant volatilization for heating contaminated soil.
Further, gas processing device includes deduster, adsorption plant and specific aim polluted gas processing equipment, absorption
Active carbon suction and/or sawdust are equipped in equipment, told specific aim gas processing device need to be purchased for different pollutants.
Further, gas flow automatic control equipment is opened at gas according to the result that gas concentration detection apparatus detects
It manages equipment or opens the exhaust duct of exhaust tube: when volatile organic content is greater than gas concentration detection apparatus preset value
When, gas is reintroduced back in gas processing device by gas flow automatic control equipment；Be less than when volatile organic content or
When equal to gas concentration detection apparatus preset value, gas is discharged into atmosphere by gas flow automatic control equipment by inflator.
Further, first gas collection device is set in contaminated soil, and the volatility for collecting in contaminated soil has
Machine object.
Further, it is additionally provided with second gas collection device at the top of assembled membrane structure, second gas collection device is used for
Collect the volatile organic matter assembled at the top of assembled membrane structure.
Further, assembled membrane structure is closed structure；Assembled membrane structure and external atmospheric pressure difference are less than etc.
In 500Pa.
Further, the snow load of assembled membrane structure is more than or equal to 30kg/m2, the wind loading rating of assembled membrane structure is big
In equal to 300N/m2。
The present invention also provides a kind of in-situ remediation methods for VOCs-contaminated Soils, using above-mentioned dirt
Contaminate the in-situ remediation system of soil, comprising the following steps:
S1. assembled membrane structure is arranged in above the soil for needing to administer, and guarantees that its air-tightness is good；
S2. contaminated soil is pronged, and opens heating equipment；
S3. it collects volatile organic matter and is introduced into gas processing device；
S4. by treated, gas introduces gas concentration detection apparatus；If volatile organic matter contains in mixed gas
It measures up to standard, is then discharged into atmosphere；If volatile organic gases content is below standard, it is discharged into gas processing device again.
Compared with prior art, the invention has the benefit that
(1) present invention repairs contaminated soil using in-situ remediation system, simple relative to showering process, at
This is cheap, can be avoided contaminated soil and causes secondary pollution during transportation, and not by environmental restrictions.
(2) relative to existing based technique for in-situ remediation, the present invention uses the fast construction assembled film knot in contaminated soil
The mode of structure carries out in-situ immobilization to contaminated soil, achievees the purpose that reduce Volatile Organic Compounds in Soil content, and the present invention
Due to the restriction effect of assembled membrane structure during handling Polluted Soil, volatile organic gases directly passes through gas treatment
Equipment is processed.
It (3), can by the way that the gas collection pipeline inside assembled membrane structure is set as bottom pipe and top duct
Sufficiently and efficient collection is changed the volatile organic gases of journey by volatile organic matter, and is delivered to gas processing device in time
In the middle, the remediation efficiency of contaminated soil is greatly improved.
(4) prefabrication may be implemented relative to other structures in assembled membrane structure provided by the invention, and scene is quickly taken
It builds, structure safety and stability, service life is long, it is big to build span, and can move reuse；In addition, assembled membrane structure
Good airproof performance avoids volatile organic matter from causing secondary pollution to environment.
It in the present invention, can also be combined with each other between above-mentioned each technical solution, to realize more preferred assembled schemes.This
Other feature and advantage of invention will illustrate in the following description, also, certain advantages can become from specification it is aobvious and
It is clear to, or understand through the implementation of the invention.The objectives and other advantages of the invention can by specification, claims with
And it is achieved and obtained in specifically noted content in attached drawing.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not to be construed as limiting the invention, in entire attached drawing
In, identical reference symbol indicates identical component.
Fig. 1 is provided by the invention for VOCs-contaminated Soils in-situ immobilization processing system flow chart.
Specific embodiment
Specifically describing the preferred embodiment of the present invention with reference to the accompanying drawing, wherein attached drawing constitutes the application a part, and
Together with embodiments of the present invention for illustrating the principle of the present invention, it is not intended to limit the scope of the present invention.
The present invention provides a kind of in-situ remediation systems for VOCs-contaminated Soils, which is characterized in that packet
Include assembled membrane structure, gas processing device, gas concentration detection apparatus and gas flow automatic control equipment；Assembled film
Heating equipment and first gas collection device are equipped in structure；First gas collection device successively with gas processing device, gas
Concentration detection device, the connection of gas flow automatic control equipment；Heating equipment is used for heating contaminated soil, gas processing device
In absorption volatile organic matter；Gas concentration detection apparatus contains for the volatile organic matter in mixed gas after detection processing
Amount；Gas flow automatic control equipment is connect with exhaust tube, and is equipped with the circulating line for leading to gas processing device.
Specifically, the in-situ remediation system provided by the invention for VOCs-contaminated Soils, including assembled
Membrane structure, gas processing device, gas concentration detection apparatus and gas flow automatic control equipment, wherein in assembled film
Inside configuration is equipped with heating equipment and first gas collection device, and heating equipment is set in contaminated soil, for accelerating Polluted Soil
Volatile organic matter in earth is evaporate into the confined space of assembled membrane structure formation, and first gas collection device is for collecting
Volatile organic matter still in contaminated soil, the gas containing volatile organic matter are exported after being collected by gas
Pipeline is introduced in gas processing device, and it is dense that treated gas by exhaust equipment (such as exhaust blower) is introduced in gas
Detection device is spent, gas concentration detection unit is connect with gas flow automatic control equipment, gas flow automatic control equipment
One of outlet conduit is connected to gas outlet, another gas outlet pipeline is connected to the inlet pipeline of assembled membrane structure.Gas
Body is after gas concentration detection apparatus detectable concentration, into gas flow automatic control equipment, gas flow automatic control equipment
The portion gas is discharged into atmosphere by gas outlet or introduces gas processing device through its outlet conduit, again to the part gas
Body carries out repair process.
It should be noted that the basis for the assembled membrane structure that the present invention uses uses steel pipe pile foundation, scene is according to peace
It fills in Standard piercing soil；Assembled membrane structure uses quadrangle wimble structure, including steel pipe skeleton, membrane material and stretching rope.Dress
Steel skeleton with formula membrane structure is built using round steel pipe, membrane material is fixed on steel skeleton by stretching rope, by assembled
Membrane structure is built above contaminated soil to be treated；The area of single assembled membrane structure covering is 100m2.For big face
, can be in parallel by multiple assembled membrane structures when product contaminated soil is repaired, pass through company between each assembled membrane structure
Road is connected to connect each other.
The present invention repairs contaminated soil using in-situ remediation system, cost simple relative to showering process
It is cheap, it can be avoided contaminated soil and cause secondary pollution during transportation, and not by environmental restrictions.And relative to existing original
Position recovery technique, the present invention carry out contaminated soil former by the way of the fast construction assembled membrane structure on contaminated soil
Position repair, achieve the purpose that reduce Volatile Organic Compounds in Soil content, and the present invention during handling Polluted Soil due to
The restriction effect of assembled membrane structure, it is processed that volatile organic gases directly passes through gas processing device；In addition, with traditional work
It is compared as workshop, assembled membrane structure provided by the invention may be implemented prefabrication, live fast construction, and structure is steady safely
Fixed, service life is long, it is big to build span, and can move reuse；In addition, assembled membrane structure good airproof performance, avoids
Volatile organic matter causes secondary pollution, assembled membrane structure provided by the invention and conventional operation workshop control case to environment
It is as shown in table 1:
The assembled membrane structure provided by the invention of table 1 and conventional operation workshop control case table
Meanwhile novel energy collector unit is used in this programme.Collection of energy is highly effective and environmentally friendly energy
Method of supplying is measured, in order to reduce the energy consumption of contaminated soil processing, assembled membrane structure provided by the invention is additionally provided with collection of energy
Unit, energy collection unit be include the piezoelectric energy collector for being arranged in assembled membrane structure inner surface, piezoelectric energy is received
Storage is used to collect the energy that the film surface vibration of the assembled membrane structure under wind load action generates.
Specifically, it by arranging piezoelectric energy collector in assembled membrane structure, can effectively collect in wind load
Act on the energy that lower membrane material surface vibration generates.The core of piezoelectric energy collector is piezoelectric material, basic functional principle are as follows:
The vibrational energy that membrane structure generates is passed to piezoelectric energy collection structure after on membrane material surface by wind action, causes this
The deformation of structure, then deformation is passed to piezoelectric material by structure, causes the variation of electric dipole moment inside piezoelectric material, to produce
Raw charge inducing, is at this moment come out charge-extraction by external circuits, is directly utilized or is first stored (such as battery) again
It utilizes.In addition, solar panel can also be arranged at the top of assembled membrane structure in the present invention, received using solar panel
Collection solar energy is simultaneously converted into electric energy, can be used to illuminate using the part electric energy to can be used for heating equipment electricity consumption.
It should be noted that energy collection technology be by energy widely distributed in natural environment (including thermal energy, wind energy,
Sound energy, water energy, solar energy, electromagnetic wave, light, mechanical vibrational energy etc.) one or more collect and be converted into electric energy, then
Directly to electronics or it is stored in capacitor, supercapacitor, rechargeable battery etc. in energy storage devices.From various
In energy source collect energy method there are many kinds of, such as using piezoelectric material, electromagnetic induction, electrostatic, solar energy, radio-frequency radiation,
Thermal gradient energy etc..Every kind of method can provide the energy of different modes, and respectively have its advantage and disadvantage.Wherein mechanical vibrational energy has wide
General distribution does not change with the factor of weather and time, sufficiently stable；Especially in some embedded or enclosed sky
Between in, mechanical vibrational energy have uniqueness and irreplaceability.Since piezoelectric energy collector and solar panel are conventional
Energy gathering devices, detailed principle and use process details repeat no more.
In order to improve the temperature of contaminated soil, accelerate the volatilization of the volatile organic matter in contaminated soil, the present invention uses
Heating equipment include single head heating electrothermal tube, single head heat electrothermal tube top be inserted into 8~12cm of contaminated soil, heat treatment system
System accelerates volatile organic contaminant volatilization for heating contaminated soil.
Specifically, heating equipment is composed using single head heating electrothermal tube, and single head heating electrothermal tube, which uses, to be arranged vertically
Mode, layout density is average, and in every square meter 4 or so, (quantity of specific arrangement heating electrothermal tube should be according to volatility in soil
Organic pollutant content and the type of soil determine), the depth of burying is apart from soil surface about 10cm at the top of electrothermal tube.Each heating
Heating equipment is connected and composed with total control switch by the way of in parallel between pipe.
In order to guarantee that assembled membrane structure air pressure inside in stability range, is additionally provided with air blower in assembled membrane structure,
The air outlet of air blower is connect with by pipeline with assembled membrane structure, and air blower is used for the soil covered to assembled membrane structure
Air is sent into inside；When opening exhaust blower, the air output of exhaust blower and the intake of air blower are consistent；I.e. when from assembly
The amount that a certain amount of gas containing volatile organic matter and air-introduced machine extraction gas are discharged in formula membrane structure should be roughly equal.
In order to preferably be detected to organic gas, automatic control is equipped in assembled membrane structure and gas detection cell includes
Pressure sensor, gas-detecting device, PLC control equipment；The internal pressure of pressure sensor detection assembled membrane structure；Gas
Detection device detects assembled membrane structure internal gas pollution level；The assembly that PLC control equipment is verified according to gas detection
Volatile organic content inside formula membrane structure controls the opening and closing of air blower.
Specifically, when gas detection equipment detects that the pernicious gas content inside assembled membrane structure is controlled higher than PLC
When the default pernicious gas content lower limit of equipment, PLC controls equipment and assigns open command to air blower, air blower open and to
Soil inner blower under assembled membrane structure, declines concentration of toxic gases；When pressure sensor detects inside membrane structure
When pressure is greater than PLC control equipment default upper pressure limit, PLC controls equipment and assigns shutdown command, air blower to air blower
It closes and stops blowing into the soil that assembled membrane structure covers, the internal pressure of assembled membrane structure is made to maintain PLC control
In the preset upper pressure limit of control equipment.
In order to fully absorb removing and harmful gas, gas processing device includes deduster, adsorption module and specific aim processing
Equipment；Adsorption module includes active carbon and/or sawdust absorber.It should be noted that active carbon in gas processing device and
When the adsorbent materials such as sawdust reach saturation state, systemic contamination soil energy automatic prompt needs to replace it, living after saturation
Property charcoal and sawdust will do it other chemical treatments, and which is not described herein again.Specific aim processing equipment is needed according to different pollutants,
Using different equipment, to guarantee the quality and efficiency of pollutant process.
In order to guarantee that the gas being discharged into atmosphere is gas up to standard, gas flow automatic control equipment is dense according to gas
The content of the volatile organic gases of degree detection device detection and open the exhaust duct of gas processing device or exhaust tube；When
Volatile organic gases content be greater than gas concentration detection apparatus preset value when, gas flow automatic control equipment by gas again
It is introduced into gas processing device；When volatile organic gases content is less than or equal to gas concentration detection apparatus preset value, gas
Gas is discharged into atmosphere by body flow automatic control equipment by exhaust tube.
Specifically, it defines in national regulation " volatile organic matter uncontrollable discharge controls standard " in exhaust tube
VOCs is monitored, and the method that main VOCs species are carried out with quantitative adduction may be selected to measure total organic compound (with TOC table
Show), or select and demarcated by primary standard substance, detector has the method for the comprehensive response of VOCs in mixing sample introduction to measure non-methane
Machine compound (indicates, in terms of carbon) with NMOC, TOC and NMOC concentration of emission content 120mg/m3, with reference to national standard, to gas
Concentration detection device carries out setting preset value, and after exhaust blower introduces gas concentration detection apparatus, gas concentration detection is set gas
Standby to detect to it, when volatile organic gases content is greater than gas concentration detection apparatus preset value, gas flow is automatic
Gas is reintroduced back in gas processing device by control equipment；When volatile organic gases content is examined less than or equal to gas concentration
When measurement equipment preset value, gas is discharged into atmosphere by gas flow automatic control equipment by exhaust tube.By giving gas concentration
Detection unit sets preset value, and gas up to standard is reintroduced back to gas processing device, air pollution is avoided and improves gas
Treatment effeciency.
In order to sufficiently collect the volatility in contaminated soil, gas collection pipeline is divided into bottom collection pipeline and collected overhead
Pipeline, bottom collection pipeline are set in contaminated soil, and collected overhead pipeline is set at the top of assembled membrane structure, bottom collection pipeline
It is used to collect volatile organic gases with collected overhead pipeline；Specifically, bottom collection pipeline is directly embedded in contaminated soil
In, away from about 30 centimeters of earth's surface, bottom collection pipeline can be carried out according to the actual situation bottom collection pipeline with parallel laid, quantity
Adjustment, is provided with hole on bottom collection pipeline, hole diameter and opens up density and can be adjusted according to the actual situation, and bottom is received
The outlet end for collecting pipeline is connected to external gas collection pipeline is set to, and bottom collection pipeline can have the volatility being collected into
Machine gas is delivered to gas processing device；In addition, the collected overhead pipeline being set at the top of assembled membrane structure is for collecting assembly
The volatile organic gases in space that formula membrane structure is formed, since to be generally less than air close for the density of volatile organic gases
It spends, after the volatile organic matter in contaminated soil becomes volatile organic gases, enters the closing of assembled membrane structure formation
In formula space, and upper space is gathered, therefore, setting collected overhead pipeline is just necessary at the top of assembled membrane structure,
The setting of collected overhead pipeline can be uniformly arranged or carry out individual character setting according to actual needs, and collected overhead pipeline is collected into
Volatile organic gases enter in subsequent gases processing equipment and handled.
By the way that the gas collection pipeline in assembled membrane structure is set as bottom pipe and top duct, can sufficiently and
The volatile organic gases being transformed by volatile organic matter is efficiently collected, and is delivered in gas processing device in time,
Greatly improve the remediation efficiency of contaminated soil.
In order to guarantee the closure of assembled membrane structure, volatile organic gases evolution pollution environment, assembled film are avoided
Structure is closed structure；Assembled membrane structure is equipped with vehicles while passing gas-tight door, personnel pass in and out gas-tight door and safe escape door.Tool
Body, after assembled membrane structure is built up, needs to prong machine using electric drive and contaminated soil is carried out to prong processing, electric drive is small
Type prongs machine and enters and leaves assembled membrane structure by vehicles while passing gas-tight door；Staff then passes in and out gas-tight door disengaging dress by personnel
With formula membrane structure, for the sake of security, assembled membrane structure is additionally provided with safe escape door, and safe escape door is for occurring urgent feelings
When condition, the escape truck of staff's emergency escape.
In order to more remove volatile organic matter completely and thoroughly, it is ensured that the stability of assembled membrane structure, assembled film
Structure and external atmospheric pressure difference are less than or equal to 500Pa；Specifically, when the pressure in assembled membrane structure is greater than ambient pressure
When 500Pa, the air pressure that membrane material is subject to is excessive, and the beauty and stress performance to assembled membrane structure will all generate unfavorable shadow
It rings；Its specific influence embodies in the following areas: on the one hand, when membrane material is acted on by excessive pressure for a long time, membrane material can
Inhomogeneous deformation can be will appear, due to membrane material deformation may unevenly make occur weak spot on membrane material；It is serious when occurring
When deformation, certain point in assembled membrane structure can be made the phenomenon that stress concentration occur, it is easy to appear breakages for this point, finally result in
It is damaged that tearing occurs for membrane material.On the other hand, when the pressure in membrane structure is excessive, excessive climbing power can be generated, this is easy
The foundation of assembled membrane structure is caused tensile failure occur；In addition, when the pressure in membrane structure is less than ambient pressure 500Pa
When, since the self weight of membrane material and the collective effect of pressure difference will lead to the phenomenon that membrane material occurs to membrane structure inner recess,
But the inside of assembled membrane structure is since with the rigid object such as steel skeleton, equipment part, membrane material touches these rigid objects
When to be easy to happen tearing damaged.
It similarly, is the implementation reliability for guaranteeing contaminated soil in-situ remediation system provided by the invention, the present invention uses
Assembled membrane structure snow load be more than or equal to 30kg/m2, wind loading rating is more than or equal to 300N/m2；Specifically, evil is being encountered
Under bad weather condition, such as severe snow and strong wind weather, the anti-snow load and wind loading rating of the assembled membrane structure that the present invention uses
It can ensure that contaminated soil in-situ remediation system can continue to carry out repair process.
The present invention also provides a kind of in-situ remediation methods of contaminated soil, as shown in Figure 1, being polluted using any of the above item
Soil in-situ repair system, comprising the following steps:
S1. assembled membrane structure and its related corollary equipment are arranged in above the soil for needing to administer, and guarantee its gas
Close property is good；Wherein, for the area of different contaminated soils, the assembled membrane structure of different number is selected.
S2. contaminated soil is pronged, opens heating equipment, heat contaminated soil, and then accelerate in contaminated soil
Volatile organic matter is evaporate into the confined space of assembled membrane structure formation.
S3. volatile organic matter is collected by first gas collecting device and second gas collecting device, and will be collected into
Volatile organic matter introduce gas processing device and handled, gas processing device utilizes the active carbon and/or sawdust in it
Absorber carries out absorption volatile organic matter.
S4. by treated, gas introduces gas concentration detection apparatus；If detecting content in volatile organic gases
It is up to standard, then it is discharged into atmosphere by exhaust tube；If detecting that volatile organic gases content is below standard, certainly by gas flow
The dynamic control equipment property of will volatilize organic gas is discharged into gas processing device again.
More than, it is merely preferred embodiments of the present invention, but scope of protection of the present invention is not limited thereto, it is any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.
Claims (10)
1. a kind of in-situ remediation system for VOCs-contaminated Soils, which is characterized in that including assembled membrane structure,
Gas processing device, gas concentration detection apparatus and gas flow automatic control equipment；It is equipped in the assembled membrane structure
Heating equipment and first gas collection device；The first gas collection device is successively examined with gas processing device, gas concentration
Measurement equipment, the connection of gas flow automatic control equipment；
The heating equipment is for heating contaminated soil, and the gas processing device is for absorbing volatile organic matter；The gas
Content of the bulk concentration detection device for volatile organic matter in mixed gas after detection processing；The gas flow automatically controls
Equipment is connect with exhaust tube, and is equipped with the circulating line for leading to assembled membrane structure.
2. the in-situ remediation system according to claim 1 for VOCs-contaminated Soils, which is characterized in that institute
State assembled membrane structure and be additionally provided with energy collection unit, the energy collection unit be include being arranged on the inside of assembled membrane structure
The piezoelectric energy collector on surface, the piezoelectric energy collector are used to collect the film of the assembled membrane structure under wind load action
The energy that surface vibration generates.
3. the in-situ remediation system according to claim 2 for VOCs-contaminated Soils, which is characterized in that institute
Stating heating equipment includes single head heating electrothermal tube, and 8~12cm of contaminated soil is inserted at the top of the single head heating electrothermal tube, described
Heat treatment system accelerates volatile organic contaminant volatilization for heating contaminated soil.
4. the in-situ remediation system according to claim 3 for VOCs-contaminated Soils, which is characterized in that institute
Stating gas processing device includes deduster, adsorption plant and specific aim polluted gas processing equipment, is equipped in the adsorption plant
Active carbon is inhaled and/or sawdust, and told specific aim gas processing device need to be purchased for different pollutants.
5. the in-situ remediation system according to claim 4 for VOCs-contaminated Soils, which is characterized in that institute
It states gas flow automatic control equipment and gas processing device or unlatching is opened according to the result that gas concentration detection apparatus detects
The exhaust duct of exhaust tube:
When volatile organic content is greater than gas concentration detection apparatus preset value, gas flow automatic control equipment is by gas
It is reintroduced back in gas processing device；
When volatile organic content is less than or equal to gas concentration detection apparatus preset value, gas flow automatic control equipment
Gas is discharged into atmosphere by inflator.
6. being directed to the in-situ remediation system of VOCs-contaminated Soils according to claim 1 or 5, feature exists
In the first gas collection device is set in contaminated soil, for collecting the volatile organic matter in contaminated soil.
7. the in-situ remediation system according to claim 6 for VOCs-contaminated Soils, which is characterized in that institute
It states and is additionally provided with second gas collection device at the top of assembled membrane structure, the second gas collection device is for collecting assembled film
The volatile organic matter of structural top aggregation.
8. the in-situ remediation system of contaminated soil according to claim 7, which is characterized in that the assembled membrane structure is
Closed structure；The assembled membrane structure and external atmospheric pressure difference are less than or equal to 500Pa.
9. the in-situ remediation system according to claim 8 for VOCs-contaminated Soils, which is characterized in that institute
The snow load for stating assembled membrane structure is more than or equal to 30kg/m2, the wind loading rating of the assembled membrane structure is more than or equal to 300N/
m2。
10. a kind of in-situ remediation method for VOCs-contaminated Soils, which is characterized in that use claim 1 to 9
The in-situ remediation system of the contaminated soil, comprising the following steps:
S1. assembled membrane structure is arranged in above the soil for needing to administer, and guarantees that its air-tightness is good；
S2. contaminated soil is pronged, and opens heating equipment；
S3. it collects volatile organic matter and is introduced into gas processing device；
S4. by treated, gas introduces gas concentration detection apparatus；If the content of volatile organic matter reaches in mixed gas
Mark, then be discharged into atmosphere；If volatile organic gases content is below standard, it is discharged into gas processing device again.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208074A (en) * | 2019-05-21 | 2019-09-06 | 上海市环境科学研究院 | A kind of Volatile Organic Compounds in Soil device for fast detecting and its detection method |
| CN110479749A (en) * | 2019-08-23 | 2019-11-22 | 长沙凯泽工程设计有限公司 | A kind of landfill leachate organic pollution soil restorative procedure and system |
| CN110653250A (en) * | 2019-07-19 | 2020-01-07 | 山东省环境保护科学研究设计院有限公司 | In-situ high-pressure rotary spraying injection repairing device for organic pollution site |
| CN113333447A (en) * | 2021-05-27 | 2021-09-03 | 中国科学院沈阳应用生态研究所 | In-situ application matching device and method for soil vapor extraction degradation restoration technology |
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| CN113333447A (en) * | 2021-05-27 | 2021-09-03 | 中国科学院沈阳应用生态研究所 | In-situ application matching device and method for soil vapor extraction degradation restoration technology |
| CN113333447B (en) * | 2021-05-27 | 2022-04-12 | 中国科学院沈阳应用生态研究所 | In-situ application matching device and method for soil vapor extraction degradation restoration technology |
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