CN102513347A - Method for treating contaminated soil by combining in-situ heat strengthening and soil vapor extraction technology - Google Patents
Method for treating contaminated soil by combining in-situ heat strengthening and soil vapor extraction technology Download PDFInfo
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- CN102513347A CN102513347A CN2011104341162A CN201110434116A CN102513347A CN 102513347 A CN102513347 A CN 102513347A CN 2011104341162 A CN2011104341162 A CN 2011104341162A CN 201110434116 A CN201110434116 A CN 201110434116A CN 102513347 A CN102513347 A CN 102513347A
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Abstract
The invention discloses a method for treating contaminated soil by combining in-situ heat strengthening and a soil vapor extraction technology, which is characterized in that a heating well with a certain form is formed in a contaminated area, a heater part is provided in the heating well, and a sleeve pipe is installed, a catalyst is filled in the sleeve pipe for accelerating the high temperature decomposition of the pollutant into simple micromolecular substances. At least one well bore is drilled at the central contaminated area of the heating well which is arranged in the certain form to form an extraction well, a vacuum system is provided for realizing the extraction of the contaminated tail gas. the heating well provides heat to contaminated soil of the heating well and the adjacent areas through the thermal conductivity of the heater part arranged in the heating well, soil is heated, the soil pollutant is subjected to processes of evaporation, in-situ pyrolysis, oxidation, combustion, distillation and the like to form tail gas like simple micromolecular gas, water and pollutant steam, then the tail gas is extracted by the vacuum system in the extraction well, and is connected to a tail gas collection pipeline of the extraction well to send to the ground surface, the pollutant in tail gas is treated through a pollutant treatment facility which is installed on the ground surface. The method also comprises an impervious sealing plate which is arranged on the contaminated soil area ground surface for minimizing the gas exchange of the heating well, the extraction well and atmosphere, and preventing the pollutant from entering in atmosphere to form secondary pollution, and a thermal insulation layer is arranged above or below the impervious sealing plate for avoiding the dissipation of heat.
Description
Technical field
The invention belongs to environmental protection technical field, particularly relate to the soil remediation technology, especially a kind of original position heat is strengthened the method that combination gaseous phase of soil extraction technique is administered contaminated soil.
Background technology
Since China's reform and opening-up; Because of a large amount of contaminated industrial places have been left in the chemical enterprise resettlement; Environmental pollution accident that contaminating enterprises' resettlement causes and the incident that health is injured also happen occasionally, and have become the urban land exploitation and have caused one of principal element of environment difficulties.Benzene series thing such as the pollutant benzene of chemical enterprise emission, toluene and agricultural go up the organic chlorine agriculture chemicals used the pollution of soil are also increased gradually.The development of petroleum industry then brought gasoline, by the oil spill accident that volatility such as diesel oil (VOCs) and semi-volatile organic matter (SVOCs) bring, break the soil environment pollution problem that oil storage tank seepage etc. cause like petroleum pipeline.If these polluters remain in the soil, will further get in water body, atmosphere and the food chain, can bring great harm to ecological environment and health.
At present, the removal of pollutant in soil there is several different methods, as excavates back burning, original position bricking, biological treatment, chemical addition agent or passivation etc.Although it is these methods successfully are used for some instance,, therefore unrealistic in large-scale soil pollution improvement owing to its expensive and the certain deficiency of existence.And the gaseous phase of soil extraction technique is a kind of physical method that utilizes; Utilize physical method to remove volatile organic matter in the unsaturated soil; Order about air with vacuum equipment generation negative pressure and flow through the soil aperture; Thereby carry volatile organic matter secretly and flow to extraction system, and a kind of technology that these volatile organic matter extractings are collected and handled behind the ground.Original position soil gas carry technology be applicable to handle Henry'S coefficient greater than 0.01 or vapour pressure greater than the VOC of 66.66Pa; Like volatility organic halogen or non-halides; Also can be used for removing pollutant gaseous phase of soil extraction techniques such as oils in the soil, heavy metal, polycyclic aromatic hydrocarbon Huo bioxin and can effectively remove the effumability organic pollution, but relatively poor for the higher half volatile organic contamination effect of boiling point.The heat treatment reinforcement technology generally is meant through direct or indirect heat exchange, and pollution medium and contained organic pollution thereof are heated to enough temperature, the process that makes organic pollution volatilize or separate from pollution medium.General situ heat treatment technology is all put forward technology with SOIL GAS and is combined to realize the reparation to the place.Utilize hot reinforcement technique that soil is heated, can improve soil characteristic, improve the permeability of soil and the mass transfer velocity of pollutant, heat treatment technics combines with the SVE technology, can strengthen the disposal ability of SVE system, accelerates the improvement speed in place.
The pertinent literature retrieval shows that Chinese patent (ZL200410056888.7) discloses a kind of volatility and the semi-volatile organic matter contaminated soil is administered technology and device outside the venue.This patent is formed in imbedding in the soil tube by the pump-drainage well of air-circulating device and temperature-control senser and heater.This patent mainly uses the method for vacuum extraction to carry out the processing of the organic polluted soil of volatility/half volatile, and treating capacity is less, can not satisfy the practical applications needs of contaminated soil in a big way.
Chinese patent ZL98805738.7 discloses a kind of method of from contaminated soil, removing the volatile liquid pollutant; This method comprises that mainly step is: heating uncontamination layer is at least the boiling temperature of pollutant up to the temperature near most of uncontamination layer of pollution layer, moves under the soil pollution course with the pollutant after avoiding evaporating.But this method only is fit to the removal to the volatile liquid pollutant, and this method must be heated to the soil moisture more than the pollutant boiling point, and it is higher to consume energy.
Great majority have existed the method expense of removing pollutant than higher, only act near surface soil.For darker pollutant, particularly among a small circle zone is adopted these methods to remove pollutants and is all had the expense problem of higher.
Summary of the invention
To the weak point that exists in the problems referred to above; The invention provides a kind of original position heat and strengthen the method that combination gaseous phase of soil extraction technique is administered contaminated soil; Can under to all types of soil and various surface conditions, realize volatility and quick, the cheap reparation of semi-volatile organic matter contaminated soil original position, avoid excavating on a large scale the secondary pollution problem that soil brings again.
The technical solution adopted for the present invention to solve the technical problems is:
The soil layer opening that forms a definite form at Polluted area at heated well deployed heater block, at least forms a soil layer opening as extraction well at certain form of heating regime well center as heated well, disposes vacuum system therein and realizes the present invention.Mounting sleeve makes heater block be positioned at sleeve pipe central authorities in the heated well, and Heat Conduction Material such as catalyst filling or sandstone gravel therein.Heated well provides heat through the thermal conductance that is installed in heater block wherein under heat effect to the contaminated soil of heated well and adjacent domain, and soil pollutant forms tail gas such as simple micro-molecular gas, water and pollutant steam through evaporation, pyrolysis, oxidation, burning and distillation etc.These tail gas are extracted into ground by the vacuum system in the extraction well, and the vacuum tube that warp links to each other with extraction well is collected, and is transferred to the Pollutant Treatment facility that is installed in the face of land and handles and dispose.The sealing plate of non-infiltration is installed on the face of land,, is prevented that pollutant from getting into atmosphere, forms secondary pollution to reduce the Gas Exchange of heated well, extraction well and atmosphere.On the non-infiltration sealing plate or under thermal insulation layer is installed in order to avoid heat scatters and disappears.
Describe the invention details in detail:
Through the Polluted area in appointment bore at least two mouthfuls of wells respectively as heated well and extraction well, and make well penetration stain soil depth at least, until reaching the uncontamination soil layer.Heater block and vacuum system are installed respectively in heated well and extraction well, soil are heated through the heater block in the heated well, with the pollutant in the soil through pyrolysis, volatilization, evaporation and be distilled into tail gas such as simple micro-molecular gas and steam.These tail gas are collected through the vacuum system in the extraction well, again through connecting Pollutant Treatment disposal facility in-situ treatment or the dystopy disposal that vacuum pipe detaches the face of land and is transported to the face of land.On the heated well that Polluted area is arranged and the extraction well face of land, can select to install non-infiltration sealing plate, the sealing face of land and heated well, extraction well to reduce the Gas Exchange of restoring area atmosphere and soil, cause pollutant entering atmospheric environment.If needed also can be on this non-infiltration sealing plate the cover heating insulating barrier, in order to avoid heat scatters and disappears.If heater than the deep branch, under the not high situation of surface temperature, can not installed non-infiltration sealing plate and thermal insulation layer underground.Simultaneously, be that heater block, vavuum pump and face of land Pollutant Treatment and disposal facility provide power supply by face of land electric power system, and the circuit tube connector of heated well assembling power supply usefulness, be heater and vavuum pump conveying power supply.
The heated well of Polluted area and extraction well layout and mode of construction can be confirmed according to the geometric properties and the soil pollution situation of Polluted area to be repaired.Heated well is by a definite form layout, the form of layout help heater in the long time period with uniform mode with the contiguous contaminated soil of heat transferred remove pollutant required repair time so that reduce.Specifically can adopt triangle, quadrangle, six distortion, polygon etc. should cover whole Polluted area, and the about 0.9-6 rice in the interval of heated well can be confirmed according to concrete Polluted area area.Central point at the heated well of a definite form layout is built extraction well through drilling well, makes in the heated well and tail gas that contiguous contaminated soil produces moves in extraction well through vacuum system.The mode of construction of heated well can adopt vertical construction, only exists near surface formation also can the employing level to build like pollutant, perhaps is level and vertical combination.If Polluted area has building or hardened ground, the then alternative certain angle of inclination of heated well mode is built.In this case, be more suitable in adopting vertical and horizontal cross-section drilling well from the edge of building or with an angle drilling well of tilting, in order to avoid surface buildings is produced disturbance.The area of heated well and extraction well and quantity depend primarily on intends time and the economic condition of accomplishing recovery project.
Before adopting heated well that contaminated soil is heated, can implement to vacuumize to extraction well earlier, so that volatile gaseous contaminant in the contaminated soil is directly detached out contaminated soil.And for half volatile and other pollutant, then through heated well contaminated soil is heated earlier, promote the weak pollutant of volatility to improve its volatility, pyrolysis under heated condition, volatilization and other act on the removal that realizes pollutant.
Mounting sleeve between heated well and heater block makes heater block be positioned at sleeve pipe central authorities.The heated well sleeve pipe just conducts heat to contaminated soil for not with the sleeve pipe of punching, reduces gas and gets into heated well, in case the too much tail gas of accumulation in the heated well is convenient to from extraction well and contiguous contaminated soil thereof, tail gas extracted.Heat polluting soil layer through heater block; Make the temperature of soil layer reach pollutant pyrolysis initial temperature; Rising along with temperature; Pollutant in the soil layer is carried out pyrolysis, and the pore water in the soil layer is vaporized, and pollutant is along with vaporize water is separated out in the soil layer arrival extraction well by the vacuum system effect.The heated well sleeve pipe is installed in the soil of opening, below Polluted area.Sleeve pipe and soil layer open bottom have certain remaining space gap, so that the heat of heater block bottom extends.Use sleeve pipe can make heater block and catalyst or Heat Conduction Material realize recycling, reduce rehabilitation cost.Heater block also can directly be installed in the uncased soil, and fills the high osmosis sand grains to improve the soil capacity of heat transmission, the set-up time and the expense of practicing thrift heated well.
In extraction well, dispose many conduits different in size; Be fixed on the metallic conduit and connection with it; Metallic conduit and face of land vacuum pipe are connected on the vavuum pump, in extraction well, keep negative pressure, and the tail gas in extraction well and the adjacent soil is arranged in the conduit of diverse location and unifies extracting in metallic conduit in extraction well; And be connected being installed in face of land Pollutant Treatment disposal facility, to realize removal to pollutant in the tail gas.Pollutant Treatment and disposal facility comprise condenser, gas-liquid separator, vavuum pump, sewage storage bin, alkali liquid washing tower, active-carbon bed and monitoring port, through this facility tail gas are handled and are disposed, and make the tail gas qualified discharge.Vavuum pump and Pollutant Treatment facility are connected with power supply by cable and realize its power supply.
If also have pollutant near surface formation, heater block should be installed in the near surface formation position so.When removing the pollutant of surface layer, need non-infiltration soft seal plate sealing upper soll layer to be installed, in order to avoid produce Gas Exchange between contaminated soil and the atmosphere at surface layer.Can be on non-infiltration sealing plate or below the cover heating insulating barrier, like hot blanket.Thermal insulation layer can reduce the heat loss that causes through the face of land, produces more effective energy.The sealing of non-infiltration soft seal plate and surface layer can be through constructing cement layer at surface layer, sealing plate and cement layer waited through welded flange realize.According to the present invention surface layer under vacuum pipe and the non-infiltration sealing plate is connected, makes sealing plate tightly be pumped in surface layer to get into soil so that under sealing plate, produce vacuum, and lower the risk of pollutant to face of land diffusion to reduce atmosphere.
A kind of realization other method of the present invention comprises circulating pump in the Pollutant Treatment disposal facility, so that with all gases and liquid pumps into heated well or other injector well is injected into into soil again.For example, the oxygen that the pollutant pyrolysis produces, hydrogen peroxide or other reactant, chemical reaction takes place and makes pollutant removal or decomposition with pollutant under higher temperature in these gases and liquid again.Or regulate soil pH value improving reaction speed, or make the pollutant accelerated decomposition with the heating acting in conjunction through the gas that refills and liquid.
Description of drawings
Below in conjunction with the present invention being further specified with reference to accompanying drawing and embodiment.
Fig. 1 is expression heated well and the multi-form layout view of extraction well;
Fig. 2 is the view of expression heated well and extraction well layout and the outside embodiment of connection;
Fig. 3 is the view of the vertical section constructed embodiment of expression heated well and extraction well;
Fig. 4 is the view of expression Pollutant Treatment disposal facility embodiment.
The specific embodiment
Fig. 1 is the multi-form layout view of expression heated well; Heated well is by a definite form layout; The form of layout help heater in the long time period with uniform mode with the contiguous contaminated soil of heat transferred remove pollutant required repair time so that reduce.Specifically can adopt triangle, quadrangle, six distortion, polygon etc. should cover whole Polluted area, and the about 0.9-6 rice in the interval of heated well can be confirmed according to concrete Polluted area area.Fig. 1-a to Fig. 1-c is respectively heated well and adopts triangle, quadrangle and hexagon form layout.
Fig. 2 has represented the view of heated well and extraction well layout and the outside embodiment of connection, adopts the quadrangle distribution form in the present embodiment.Heated well connects with conductive cable 59 each other, can be series, parallel or both combinations.Adopt vacuum collecting pipeline 65 ' to link to each other between the extraction well of the face of land.This pipeline can be metal, haloflex (CPVC) and plastics (PVC) material, specifically confirms pipe material according to the pollutant kind of Polluted area to be repaired and the heating-up temperature of contaminated soil.In a specific embodiment, this pipeline is the metal material pipeline.Non-infiltration sealing plate 42 is installed on the Polluted area face of land of arranging heated well and extraction well,, is prevented that too much air from getting into soil, also avoid pollutant in soil to get into atmosphere to reduce the Gas Exchange of air and soil.Heated well and the required power supply of extraction well vacuum system are provided by electric power system 62.Exhaust system is sent to Pollutant Treatment disposal facility 61 by pipeline gathering system 65 '.
Fig. 3 has represented to be arranged in an exemplary embodiments of the heated well and the extraction well profile of Polluted area to be repaired.Heated well 31 is placed in the soil layer opening 30; Diverse location installation centralizer 54 on heater block 53, sleeve pipe 51, the heater block 53 is installed in the heated well; It between sleeve pipe and the heater block packed bed 52; Packed bed can be catalyst or Heat Conduction Material, passes well head fixture 56 by conduction connection 21 with cable 59 at heated well 31 tops.The well head fixture is fixing with welded flange 64 realizations and the face of land.Heater block 53 can for electric heater, combustion furnace, with the stratum in the burner that reacts of material or product and/or the combining form of these heaters, but be not limited only to these.Utilize well head fixture 56 to be fixed on suspension heater block in the sleeve pipe, centralizer is installed,,, produce and be heated inequality or cause the sleeve pipe high temperature corrosion in case heater block tilts or contacts with sleeve pipe with fixed heater at heater block 1/2 or 1/3 place.Centralizer can be roller type, slide block type, automatic reverse formula.Heater block 53 is connected in the ground watch circuit by the lead-in cable 59 on top, links to each other with ground power supply system 62, for heater is carried power supply again.Be arranged in flexible conduit 58 in the vacuum well and be fastened on the diverse location of shaft bottom conduit 65, realize extracting tail gas by vavuum pump 60.These a plurality of soft conduits are different in size, and some flexible conduit will have enough length to guarantee that it extends to the shaft bottom, and some flexible conduit also can enough be lacked and only is installed near the well head, so that the gas of whole extraction well is detached.This flexible conduit can be formed by high-temperature resistant rubber, it is advantageous that to install simply, can conveniently block into random length, and significantly reduces purchase and cost of transportation.By extraction well inner exhaust gas conduit 65 tail gas is sent to the exhaust collection pipeline 65 ' on ground from extraction well, the exhaust collection pipeline can be processed for metal tube.Non-infiltration sealant 42 and thermal insulation layer 55 can be arranged to cover whole pollution restoring area.Heater block 53 can be made up of resistance alloys for the commercialization heater, like nickel alloy for the conduction mode of heating; Can tolerate very high temperature (1250 ℃), can be for the electric heater heating rod, like carborundum tube; Can be warmed up to 1500 ℃; Or other semi-conducting material such as chromic acid lanthanum, its temperature can reach more than 1500 ℃, also can be other electric heater as filling the halogen quartz ampoule of halogen gas.Can fill packed bed 52 between this heater block and the sleeve pipe; The packed bed filler can be filler thermal conducting materials such as sand, grit; Also can be the high-temperature catalytic powder, like alumina, tripoli, iron or zinc oxidant, noncrystal aluminosilicate; Or specific oxidation reduction catalyst etc., can resolve into simple small-molecule substance by the catalysis pollutant.Alumina and ferroxidant have performance thermal conductance ability preferably, can the heat that heater block 53 distributes be polluted in the soil layer 24 with minimum thermal loss conduction.Also can adopt other catalyst according to pollutant kind, or alumina, tripoli or ferroxidant are used in combination.Heater block can conduct heat to through filler when heating and close on soil, prevents that heating element heater from directly contacting with sleeve pipe, and heater also can outwards expand when heating.Sleeve pipe 51 is the high-temperature corrosion resistance material, can be made up of stainless steel tube, and like stainless steel 310,304, alloy 35-19,80-20CB, Inconel 601, Incoloy 800HT etc., sleeve pipe 51 also can adopt cement such as carborundum, silicon nitride or alumina etc.Another embodiment of heated well does not use sleeve pipe 51.Drilling well obtains soil layer opening 30, and the direct vertical hanging of heater block in open centre, and is fixed on the face of land, between heater block and soil layer opening tube wall, directly fills filler 52.Sleeve pipe be can avoid the use of like this, set-up time and expense reduced.But its defective is heating element 53 and filler 52 directly to be contacted with contaminated soil, the comparison difficulty that makes both recovery and change.Stratum opening 31 should extend to uncontamination soil from contaminated soil, and heated well then is expanded to whole or the part contaminated soil.Connect heater block 53 and electric power system 62 through conductive cable 59.Conductive cable 59 should be insulation and be made up of high temperature conductor such as nickel or copper, and is comparatively suitable like mineral insulated cable.Conductive cable 59 and vacuum pipe 65 can pass welded flange 64.
Before being fit into soil layer opening 30, can heated well be built up, to reduce the set-up time of heater.For need the soil layer opening of heated well is installed vertically, according to the geological conditions and the degree of depth of soil region to be repaired, can be adopted auger or mud to bore and accomplish, heated well 31 is also selectively simple to be inserted underground and not to adopt drilling well in advance.
The sealing plate 42 of impermeability can be used for sealing the Polluted area face of land, to reduce the Gas Exchange of air and soil, prevents that too much air from getting into soil, also avoids pollutant in soil to get into atmosphere.Non-infiltration sealing plate can be processed the impermeable again gas of existing plasticity by other exotic materials such as fluorocarbon, fluorubber and tempered glass fiber fluorubber of metal, resin rubber, glass fiber-reinforced resin rubber, impregnated glass fiber.The impermeability sealing plate is a metallic plate in a typical embodiment.The impermeability sealing plate can seal through welding or alternate manner and heated well and extraction well.On the sealing plate of impermeability or below can arrange thermal insulation layer 55, to reduce the exchange heat of area to be repaired soil and atmosphere, prevent the heat loss from soil, and guarantee that pollution steam can not get back in the soil again in condensation under the sealing plate.Thermal insulation layer can be a mineral material, absorbent cotton, mineral wool or glass fibre, polystyrene foam and aluminized mylar etc. or other insulating materials.This thermal insulation layer is hot blanket in a typical embodiment, and is arranged in below the sealing plate of impermeability.
If pollutant is not the contiguous face of land, and heater is installed in apart from the face of land certain distance arranged, and can prevent that then the high temperature on the face of land scatters and disappears.In this case, can adopt low temperature seal material such as PVC, polyethylene etc., or direct blow-by soil layer are to practice thrift rehabilitation expense.
What Fig. 4 represented is an embodiment sketch map of pollutant soil surface treatment disposal facility, and this facility can comprise pump 611, condenser 612, gas-liquid separator 613, sewage storage bin 614, alkali liquid washing tower 615, active-carbon bed 616 etc.This treatment and disposal facility can realize that the tail gas (comprising gas and pollutant steam) that extracting is gone out handles and dispose, and makes it qualified discharge.Tail gas to the Pollutant Treatment disposal facility, gets into condenser 612 by the vacuum collecting pipeline transmission after pump 611 extractings, temperature is after 90-120 ℃ high-temperature tail gas passes through condenser condenses, to be reduced to 25-40 ℃.Condensed tail gas is connected to gas-liquid separator 613, and tail gas is separated into liquid phase and gas mutually, through gas-liquid separator with steam, fluid contaminants is separated from the gas opens.Water can separate according to its density feature again with fluid contaminants, and gas further carries out the original place processing.Isolated liquid can be collected and is transported to sewage treatment plant and handle by face of land sewage storage box 614.Isolated gas phase partly feeds alkali liquid washing tower 615, utilizes in the scrubbing tower NaOH solution to the SO in the tail gas
2, harmful exhausts such as HCl, oxynitrides wash, the wash solution recycle, the pH value through solution after the monitor wash is control NaOH solution concentration automatically, guarantees that effectively washing and cleaning exhaust gas discharge.Remainder tail gas is connected with active-carbon bed 616, so that the pollutant in the tail gas is absorbed by active carbon, makes pollutant reduce to acceptable level, realizes the tail gas qualified discharge.Typical tail gas activated carbon adsorption bed 616 embodiment can process for the lucite post that is filled with granular activated carbon.Alternative is provided with circulating pump, so that the pyrogenous origin little molecular oxidation agent of the gas of extensive stockization and liquid and pollutant can be expelled in the heated well like water, oxygen, hydrogen peroxide, acid & alkali liquid etc., to remove more multi-pollutant again.
Claims (12)
1. an original position heat is strengthened the method that combination gaseous phase of soil extraction technique is administered contaminated soil, and this method comprises:
The soil layer opening that in the contaminated soil zone, forms a definite form is as heated well, extraction well; The heater block of laying in the heated well provides required power supply by face of land electric power system, makes heater block heating and with its heat transferred adjacent soil; Heating soil reduces pollutant level; Extracting is used for realizing that the tail gas after the collection is transferred to pollutant face of land Collecting and dealing facility, qualified discharge after treatment the tail gas that heating produces to extraction well by vacuum system.
2. heated well according to claim 1 is characterized in that, can be vertical, level, inclination or three's compound mode.
3. heated well according to claim 1 and extraction well is characterized in that, its layout can be triangle, multiple shapes such as quadrangle, six distortion, polygon.
4. according to the heater block described in the claim 1, it is characterized in that, directly in the mounting sleeve, and directly be arranged in the contaminated soil.
5. according to the heater block described in the claim 1, it is characterized in that this heater block is to soil, sleeve pipe and soil conduction heating.
6. according to the heated well described in the claim 1; It is characterized in that, between sleeve pipe and heater block, fill packed bed, this packed bed filler can be heat fillings such as sand, grit; Also can be the high-temperature catalytic powder; Like alumina, tripoli, iron or zinc oxidant, noncrystal aluminosilicate, or specific oxidation reduction catalyst.
7. extraction well according to claim 1 is characterized in that, a plurality of soft conduits are installed therein, and this soft conduit is different in size, has enough length to guarantee that it extends to shaft bottom and well head, and this soft conduit can be formed by high-temperature resistant rubber.
8. according to the said contaminated soil of claim 1 zone, it is characterized in that installing non-infiltration sealing plate and thermal insulation layer above that.
9. according to the said electric power system of claim 1, it is characterized in that this electric power system adopts cable to link to each other with heater block, vavuum pump etc., constitutes a circuit.
10. according to the said vacuum system of claim 1, it is characterized in that and to form vacuum layer to the non-infiltration sealing plate of the extraction well and the face of land.
11. according to the said pollutant of claim 1 face of land Collecting and dealing facility, it is characterized in that, comprise pump, condenser, gas-liquid separator, sewage storage bin, alkali liquid washing tower, active-carbon bed etc.
12. the described pollutant of claim 9 face of land Collecting and dealing facility; It is characterized in that; Circulating pump is set; So that the pyrogenous origin little molecular oxidation agent of the gas of extensive stockization and liquid and pollutant can be expelled in the heated well like water, oxygen, hydrogen peroxide, acid & alkali liquid etc., to remove more multi-pollutant again.
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