CN208542735U - Electric current for organic contamination place heats thermal desorption electrode wells in situ - Google Patents
Electric current for organic contamination place heats thermal desorption electrode wells in situ Download PDFInfo
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- CN208542735U CN208542735U CN201821000774.4U CN201821000774U CN208542735U CN 208542735 U CN208542735 U CN 208542735U CN 201821000774 U CN201821000774 U CN 201821000774U CN 208542735 U CN208542735 U CN 208542735U
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Abstract
The utility model discloses a kind of electric currents for organic contamination place to heat thermal desorption electrode wells in situ, and electrode wells are opened in organic contamination place, and electrode wells include heating zone and unheated zone, and heating zone is set to below unheated zone；Electrode is provided in heating zone, heating zone filler of the surrounding them filled with conductive energy, unheated zone are filled with the unheated zone filler with insulation performance in heating zone.Pass through the technical solution of the utility model, realize the heating that precision is carried out to organic contamination place, to realize the thermal desorption in situ to volatile organic contaminant, simultaneously because the precision of heating, reduce the waste of energy, the thermal desorption effect to organic pollutant is improved, to improve the repairing effect to organic contamination place.
Description
Technical field
The utility model relates to pollution remediation technology field more particularly to a kind of electric current heating for organic contamination place
Thermal desorption electrode wells in situ.
Background technique
China has carried out contaminated site repairing and treating engineering in succession in recent years, and by taking Jiangsu as an example, nearly 10 are completed at present
Contaminated site recovery project, and as the resettlement of contaminating enterprises is renovated, multiple contaminated site recovery projects are also being implemented successively.
However, the contaminated site reparation in China is at the early-stage at present, existing recovery project mostly uses greatly dystopy landfill and cement kiln total
The based technique for in-situ remediation disposed isotonic processing mode (at high cost, secondary pollution is serious), and used by it is a large amount of eager for instant success and quick profitsly
(the excessive use of warm parsing as usual, in a short time excessive injection oxidating chemicals) are used, many rehablitation projects is caused to be given up halfway.
Therefore, China needs to carry out effective soil and groundwater pollution based technique for in-situ remediation research at this stage.
Thermal desorption technology in situ is an important means in organic polluted soil based technique for in-situ remediation, mainly for the treatment of one
The more difficult region for carrying out dystopy environment remediation a bit, for example, the pollution amelioration below deep soil and building.In-situ heat is de-
Attached technology is that contaminated soil is heated to target temperature, selectively promotes dirt by control system temperature and residence time of material
Object gasification volatilization is contaminated, target contaminant is made to separate, remove with soil particle.Thermal desorption process can make the organic compound in soil
The physicochemical changes such as object volatilization and cracking.After pollutant is converted into gaseous state, mobility will be greatly improved, and be evaporated
Gaseous products by collect and capture after carry out purified treatment.
The advantages that thermal desorption in situ has regulation effect good, and secondary pollution is small, small to place disturbance.But in-situ heat is de-
Attached, especially the thermal desorption in situ of gas heating cannot heat merely designated depth section, need place from lowest part to most
The problems such as eminence entire body heats, and causes the waste of energy.
Utility model content
At least one of regarding to the issue above, the utility model provides a kind of electric current for organic contamination place and adds
Hot in-place thermal desorption electrode wells, by the heating zone filler conductive in the filling of the heating zone of electrode wells lower layer, in heating zone filler
Middle setting electrode, in the unheated zone filler of heating zone upper layer filling insulation, thus according to the featured configuration in organic contamination place
The depth and position of electrode and heating zone realize the heating that precision is carried out to organic contamination place, realize organic to volatility
The thermal desorption reparation in situ of pollutant, simultaneously because the precision of heating, reduces the waste of energy, improve to organic contamination
The thermal desorption effect of object.
To achieve the above object, it is de- to provide a kind of electric current heating in-situ heat for organic contamination place for the utility model
Attached electrode wells, the electrode wells are opened in organic contamination place, and the electrode wells include heating zone and unheated zone, the heating
Area is set to below the unheated zone；Electrode, the filling of surrounding them described in the heating zone are provided in the heating zone
There is the heating zone filler of conductive energy, the unheated zone is filled with the unheated zone filler with insulation performance.
In the above-mentioned technical solutions, it is preferable that the heating zone and the unheated zone in the electrode wells are set as
Multistage, the heating zone and unheated zone interval setting.
In the above-mentioned technical solutions, it is preferable that water supply pipe, the upper orifice of the water supply pipe are additionally provided in the electrode wells
It is connected with water supply device, the lower nozzle of the water supply pipe extends into the electrode wells.
In the above-mentioned technical solutions, it is preferable that the electrode is conductive plate or conductive rod, and the electrode passes through cable and ground
Power supply system on face is connected.
In the above-mentioned technical solutions, it is preferable that the electrode material is iron or graphite.
In the above-mentioned technical solutions, it is preferable that the heating zone filler is steel ball, metal powder or graphite particle.
In the above-mentioned technical solutions, it is preferable that the unheated zone filler includes quartz sand, bentonite or cement.
In the above-mentioned technical solutions, it is preferable that the electrode wells further include sealant, and the sealant is covered in well head,
The sealant is heatproof waterproof layer.
Compared with prior art, the utility model has the following beneficial effects: being led by the filling in the heating zone of electrode wells lower layer
The heating zone filler of electricity, is arranged electrode in the filler of heating zone, in the unheated zone filler of heating zone upper layer filling insulation, thus
According to depth and the position of the featured configuration electrode in organic contamination place and heating zone, realizes and organic contamination place is carried out precisely
The thermal desorption reparation in situ to volatile organic contaminant is realized in the heating of change, simultaneously because the precision of heating, reduces energy
The waste of amount improves the thermal desorption effect to organic pollutant.
Detailed description of the invention
Fig. 1 is that a kind of disclosed electric current for organic contamination place of embodiment of the utility model heats thermal desorption electricity in situ
The structural schematic diagram of pole well；
Fig. 2 is that the disclosed electric current for organic contamination place of another embodiment of the utility model heats thermal desorption in situ
The structural schematic diagram of electrode wells；
Fig. 3 is that the disclosed electric current for organic contamination place of the utility model another embodiment heats thermal desorption in situ
The structural schematic diagram of electrode wells.
Corresponding relationship in figure, between each component and appended drawing reference are as follows:
1. heating zone, 11. heating zone fillers, 2. unheated zones, 21. unheated zone fillers, 3. electrodes, 4. cables, 5. is close
Sealing, 6. water supply pipes.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is a part of the embodiment of the utility model, instead of all the embodiments.Based on the reality in the utility model
Apply example, those of ordinary skill in the art's every other embodiment obtained without making creative work, all
Belong to the range of the utility model protection.
The utility model is further described in detail with reference to the accompanying drawing:
As shown in Figure 1, de- according to a kind of electric current heating in-situ heat for organic contamination place provided by the utility model
Attached electrode wells, electrode wells are opened in organic contamination place, and electrode wells include heating zone 1 and unheated zone 2, and heating zone 1 is set to
2 lower section of unheated zone；Electrode 3 is provided in heating zone 1, the heating in heating zone 1 filled with conductive energy around electrode 3
Area's filler 11, unheated zone 2 are filled with the unheated zone filler 21 with insulation performance.
Specifically, electrode wells are divided into heating zone 1 and unheated zone 2 from bottom to top, the position and depth root that heating zone 1 is arranged
It is determined according to the position in organic contamination place and pollutant depth.Electrode 3 is in the heating zone 1 filled with heating zone filler 11,
Due to the electric conductivity of heating zone filler 11, electric current is by heating zone filler 11 when being powered for electrode 3, to filled with heating zone filler
11 entire heating zone 1 is heated, and due to the characteristic that the heat of volatile organic matter is volatilized, organic pollutant is by liquid or admittedly
State is converted into gaseous state, thus under the action of further soil vapor extraction technology, organic pollutant is clear from contaminated site
It removes, completes the reparation to organic contamination place.
In the above embodiment, it is preferable that electrode 3 is conductive plate or conductive rod, electrode 3 passes through on cable 4 and ground
Power supply system is connected, and electrode 3 should have certain current-carrying capacity, such as iron plate or graphite rod etc., preferably iron plate.Cable 4
It is preferred that there is high temperature resistant, the material of corrosion resistance characteristic, to improve the tolerance that cable 4 corrodes pollutant in contaminated site,
Extend the service life of cable 4.
In the above embodiment, it is preferable that heating zone filler 11 is steel ball, iron sand, metal powder or graphite particle etc., have
Chemical stability and nontoxicity, it is not soluble in water, it is not lost, it is corrosion-resistant.Unheated zone filler 21 includes quartz sand, bentonite or water
Mud.Specifically, heating zone filler 11 and unheated zone filler 21 all have certain partial size, so that converting by organic pollutant
After gaseous state, gaseous pollutant can flow under the action of gas phase extraction technique, so that the gaseous pollutant that will volatilize out is received
Purified treatment is carried out after collection or capture, soil is discharged.
As shown in Fig. 2, in the above embodiment, it is preferable that be additionally provided with water supply pipe 6 in electrode wells, the upper tube of water supply pipe 6
Mouth is connected with water supply device, and the lower nozzle of water supply pipe 6 extends into electrode wells, and lower nozzle extends to heating zone filler 11 or non-
In heating zone filler 21, preferably extend into heating zone filler 11.Due to heating zone filler 11 and unheated zone filler
21 all have certain partial size, the infiltration for the electrolyte that water supply pipe 6 will not be hindered to supplement.Electric current is being carried out to organic contamination place
During organic pollutant original position thermal desorption is realized in heating, heating evaporation causes electrode wells periphery dry, influences the biography of electric current
It is defeated, cause heating process to be affected, therefore, water supply pipe 6 is set to mend when moisture content is too low in electrode wells into electrode wells
Fill electrolyte (containing ionized water).Water supply pipe 6 preferably has high temperature resistant, the material of corrosion resistance characteristic, is being polluted with improving water supply pipe 6
The tolerance for corroding and heating high temperature in place to pollutant, extends the service life of water supply pipe.
As shown in figure 3, in the above-described embodiments, heating zone and unheated zone in electrode wells are set as multistage, heating zone
It is arranged with unheated zone interval.In this way, if the soil in electrode wells position different depth has in the presence of what needs heated
Machine pollutant then fills heating zone filler in the depth areas for needing to heat, and fills non-add in the depth areas for not needing heating
Hot-zone filler.Namely in the position where electrode wells, it is divided into first segment heating zone, first segment unheated zone, from bottom to top
Two sections of heating zones, second segment unheated zone etc., and so on.In this embodiment, multiple water supply pipes can also be set, it is multiple
The lower nozzle of water supply pipe extends respectively to the heating zone filler that first segment heating zone and second segment heating zone etc. need heating region
In, for supplementing electrolyte for different depth region.
In the above embodiment, it is preferable that electrode wells further include sealant 5, sealant 5 is covered in well head, and sealant 5 is
Heatproof waterproof layer, prevent the water of upper soll layer largely penetrate into electrode wells and inside and outside upper soll layer heat exchange, influence
Heating in-situ heat desorption process in electrode wells guarantees the repairing effect to organic contamination place.
It is exemplified below the two of them embodiment for carrying out concrete practice to the utility model according to above-described embodiment, to this
The electrode wells and its in-situ heat desorption effect that utility model proposes are further described:
Embodiment 1:
Before reparation, to organic contamination place testing result are as follows: the content of 1,2- dichloroethanes is 15~4100mg/ in soil
kg。
Repairing step includes:
1) electrode wells of 4 meters of depths are opened up in organic contamination place, electrode wells are divided into heating zone 1 and unheated zone from bottom to top
2；
2) 2 meters long of electrode 3 is protruded into the heating zone 1 in electrode wells；
3) heating zone filler 11 is filled to heating zone 1, such as steel ball；Then quartz sand material is filled to unheated zone 2；
4) it is powered to electrode 3, electric current is passed through into electrode 3 and heating zone filler 11, thus heating soil and underground water, and tie
Gas phase extracting effect is closed, pollutant is removed from contaminated site；
5) into 3 galvanization of electrode, when moisture content is too low in heating zone filler 11, by water supply pipe 6 to electrode
Electrolyte (containing ionized water) is supplemented in well, continuous repair is handled 125 days.
After repair process, detect that 1, the 2- dichloroethane content in soil is 1~3mg/kg.
Embodiment 2:
Before reparation, to organic contamination place testing result are as follows: the content of carbon tetrachloride is 7~126mg/kg in soil.
Repairing step includes:
1) electrode wells of 4 meters of depths are opened up in organic contamination place, electrode wells are divided into heating zone 1 and unheated zone from bottom to top
2；
2) 2 meters of long electrodes 3 are protruded into the heating zone 1 in electrode wells；
3) heating zone filler 11 is filled to heating zone 1, wherein heating zone filler 11 is metal powder；Then to unheated zone 2
Fill quartz sand material；
4) it is powered to electrode 3, by electric current by electrode 3 and heating zone filler 11, heating soil and underground water, and combines gas
Phase extracting effect removes pollutant from contaminated site；
5) into 3 galvanization of electrode, when moisture content is too low in heating zone filler 11, by water supply pipe 6 to electrode
Electrolyte (containing ionized water) is supplemented in well, continuous repair is handled 74 days.
After repair process, detect that the carbon tetrachloride content in soil is 0.1~0.2mg/kg.
The above is the embodiments of the present invention, according to the utility model proposes for organic contamination place
Electric current heats thermal desorption electrode wells in situ, by the heating zone filler conductive in the filling of the heating zone of electrode wells lower layer, is heating
Electrode is set in area's filler, in the unheated zone filler of heating zone upper layer filling insulation, thus according to the spy in organic contamination place
Property setting electrode and heating zone depth and position, realize to organic contamination place carry out precision heating, realize to volatilization
Property organic pollutant thermal desorption reparation in situ improve simultaneously because the precision of heating, reduces the waste of energy to having
The thermal desorption effect of machine pollutant.
The above is only the preferred embodiments of the utility model, are not intended to limit the utility model, for this field
Technical staff for, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model,
Any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of electric current for organic contamination place heats thermal desorption electrode wells in situ, it is characterised in that:
The electrode wells are opened in organic contamination place, and the electrode wells include heating zone and unheated zone, and the heating zone is set
It is placed in below the unheated zone；
Electrode, heating zone of the surrounding them described in the heating zone filled with conductive energy are provided in the heating zone
Filler, the unheated zone are filled with the unheated zone filler with insulation performance.
2. the electric current according to claim 1 for organic contamination place heats thermal desorption electrode wells in situ, feature exists
In the heating zone and the unheated zone in the electrode wells are set as multistage, the heating zone and the unheated zone
Interval setting.
3. the electric current according to claim 1 or 2 for organic contamination place heats thermal desorption electrode wells in situ, feature
It is, water supply pipe is additionally provided in the electrode wells, and the upper orifice of the water supply pipe is connected with water supply device, the water supply pipe
Lower nozzle extend into the electrode wells.
4. the electric current according to claim 1 for organic contamination place heats thermal desorption electrode wells in situ, feature exists
In the electrode is conductive plate or conductive rod, and the electrode is connected by cable with the power supply system on ground.
5. the electric current according to claim 4 for organic contamination place heats thermal desorption electrode wells in situ, feature exists
In the electrode material is iron or graphite.
6. the electric current according to claim 1 for organic contamination place heats thermal desorption electrode wells in situ, feature exists
In the heating zone filler is steel ball, metal powder or graphite particle.
7. the electric current according to claim 1 for organic contamination place heats thermal desorption electrode wells in situ, feature exists
In the unheated zone filler includes quartz sand, bentonite or cement.
8. the electric current according to claim 1 for organic contamination place heats thermal desorption electrode wells in situ, feature exists
In the electrode wells further include sealant, and the sealant is covered in well head.
9. the electric current according to claim 8 for organic contamination place heats thermal desorption electrode wells in situ, feature exists
In the sealant is heatproof waterproof layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821000774.4U CN208542735U (en) | 2018-06-27 | 2018-06-27 | Electric current for organic contamination place heats thermal desorption electrode wells in situ |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821000774.4U CN208542735U (en) | 2018-06-27 | 2018-06-27 | Electric current for organic contamination place heats thermal desorption electrode wells in situ |
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| CN208542735U true CN208542735U (en) | 2019-02-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108435778A (en) * | 2018-06-27 | 2018-08-24 | 北京高能时代环境技术股份有限公司 | Electric current heating thermal desorption electrode wells in situ for organic contamination place |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108435778A (en) * | 2018-06-27 | 2018-08-24 | 北京高能时代环境技术股份有限公司 | Electric current heating thermal desorption electrode wells in situ for organic contamination place |
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Effective date of registration: 20190227 Address after: 100095 Beijing Haidian District Dijin Road 9 Courtyard 13 Building-1-4 Floor 101 Inner Floor Co-patentee after: BEIJING GEOENVIRON ENGINEERING TECHNOLOGY, INC. Patentee after: Beijing GeoEnviron Engineering & Technology, Inc. Address before: 100095 Beijing Haidian District Dijin Road 9 Courtyard 13 Building-1-4 Floor 101 Inner Floor Patentee before: Beijing GeoEnviron Engineering & Technology, Inc. |