CN203235746U - In-situ remediation device for unsaturated zone soil with light oil pollution - Google Patents
In-situ remediation device for unsaturated zone soil with light oil pollution Download PDFInfo
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Abstract
The utility model discloses an in-situ remediation device for unsaturated zone soil with light oil pollution. The device comprises an underground well group system, a pipeline system and a ground processing system, wherein underground well group system comprises an extraction well, an injection well and a ventilation monitoring well; the ground processing system comprises an oil gas extraction and processing module, a microbial enhanced remediation module, and a chemical oxidation remediation module, wherein the oil gas extraction and processing module comprises a vacuum pump, an oil-gas separation tank and an oil-gas adsorption tank, the inlet of the oil-gas separation tank is connected with the extraction well, the outlet of the oil-gas separation tank is connected with the inlet of the oil-gas adsorption tank, and the outlet of the oil-gas adsorption tank is communicated with the atmosphere; the microbial enhanced remediation module comprises a microbe and nutrient solution preparation tank internally filled with first injection solution, the microbe and nutrient solution preparation tank is connected with the inlet of a first injection metering pump, and the outlet of the first injection metering pump is connected with the injection well; the chemical oxidation remediation module comprises a chemical oxidant preparation tank internally filled with second injection solution, the chemical oxidant preparation tank is connected with the inlet of a second injection metering pump, and the outlet of the second injection metering pump is connected with the injection well.
Description
Technical field
The utility model relates to field of environment protection, and particularly a kind of light oil for the gas station pollutes the in-situ repairing device of unsaturation band soil, and it combines " soil vapor extraction ", " microbial augmentation degraded " and functions such as " chemical oxidation degradeds ".
Background technology
Soil petroleum pollution often has that pollutant kind is many, incubation period is long, diffusion area is wide, harm is large, underground structure is complicated, difficulty of governance is large, the rehabilitation cost high.If can not control effectively to soil pollution now, may further worsen in the future, threaten ecological environment and the mankind's health.The exploitation oil-polluted soils field repairing method and equipment, become the present stage environmental protection work in the urgent need to.
Have statistical analysis to show, the leakage of buried tank (USTs) is the main reason that causes current Urban Soil Pollution.According to U.S. EPA calendar year 2001 statistics, gas station, the whole America has 35% in seepage, nearly 420,000 of the buried tank of affirmation seepage, and almost all there is Seepage in the gas station that built up in the past in 1970.China Service Station is mainly sold the light-end products take gasoline, diesel oil as representative, in case sunken tank generation Seepage can form rapidly soil pollution.If level of ground water is more shallow, can pollute in a short time underground water (saturated zone); If level of ground water is darker, light oil can exist and diffusion mobility behavior by the midium or long term aggravates to pollute in that unsaturation band soil is medium-term and long-term.
The level of ground water of region, most of China gas station is darker, and it is most probable that the light oil of unsaturation band soil pollutes, also be the most incident pollution type.Low-molecular-weight arene, olefines, alkanes, alkyl ether and a small amount of colloid class during the composition of light-end products mainly comprises,, be trapped in the soil porous media environment mainly with ADSORPTION STATE or gaseous form then take volatile organic matter (VOCs) and semi-volatile organic matter (SVOCs) as main in nature.
For the environment and health risk that the soil petroleum pollution case of being on the increase is brought, corresponding recovery technique is improved in constantly studying and putting into practice and innovates.Restorative procedure is divided from function and is mainly contained biology and physical chemistry method, and the materialization restorative procedure comprises gaseous phase of soil suction, thermal desorption, soil cleaning, Soil leaching, chemical oxidation etc.; Biological renovation method comprises biological compost, biological mud, biological ventilation, the biological expedient of tillage, phytoremediation etc.Whether shift out processing according to soil, can be divided into again original position and dystopy method.Consider the problems such as rehabilitation cost, on-the-spot disturbance, pollution transportation and subsequent treatment, based technique for in-situ remediation is more suitable in practical application.
In every based technique for in-situ remediation of oil-polluted soils: soil vapor extraction makes the Vapor Entrainment VOCs that flows migrate to ground installation and processes by strengthen the directed flow of air in unsaturated zone extracting gas phase.Its advantage is economical and effective, but not good to the suction effect of SVOCs, and long repairing efficiency also causes cost higher.The biological ventilation by improving original position to the microbial degradation ability to Polluted area air supply or O2, and the VOCs that enters in the atmosphere is minimized; Also can add nutriment to stimulate the growth metabolism of indigenous microorganism to Polluted area simultaneously.Biological ventilation is more thorough to the reparation that heavier petroleum hydrocarbon product (such as diesel oil) pollutes, but needs long biodegradation period.Soil leaching and oil field secondary oil recovery " water drive ", " poly-driving " principle commonly used is similar, and injector well makes the leacheate soil pollution district that flows through, petroleum pollution under the driving force effect, by drip washing to the zone that can be extracted out by underground water well.Its advantage is that repairing efficiency is short, repairs more thoroughly, but floor treatment technique and device complexity easily cause petroleum pollution to shift to saturated zone.
Soilillatge excavates oil-polluted soils, stir, spread out, and supplies with or adds nutrients and increase the microbial degradation activity by increasing soil O2, is more suitable in thin solum and long-term repair than the pollution of heavy oils.Chemical oxidation is injected into oxidant in the soil, and pollutant is degraded by chemical reaction; Compare with other restorative procedures, chemical oxidation petroleum hydrocarbon contaminant capable of being fast degraded if the reaction time is enough, can be CO2 and H2O with the pollutant exhaustive oxidation, but also has the too high shortcoming of rehabilitation cost, for the degraded of low concentration pollutant economical and effective more.Phytoremediation is to utilize the mechanism such as the absorption of plant and rhizosphere circle microorganism system thereof, volatilization, conversion, degraded to remove pollutant in the soil environment; Rehabilitation cost is low, but the cycle is long, is subjected to seasonal effect, only is fit to the topsoil reparation.
Every kind of soil pollution restorative procedure has its applicability, any restorative procedure no matter, because the difference of soil property and pollution sources, the purpose of the removal all contaminants that single soil pollution restorative procedure all is difficult to reach quick, efficient, economic, the general mode that adopts several different methods to combine of present recovery technique and equipment.Utility model patent CN102228900A discloses a kind of original position comprehensive repair system and method for oil-polluted soils, mainly adopts the two-phase vacuum draw and stimulates the means of repairing that the underground environment (mainly being saturated zone soil) of free phases severe contamination is repaired in conjunction with microorganism; Comprise oil phase, water, gas phase owing to extract material out, cause the floor treatment complex process.Equipment investment cost is large, and operating cost is high, does not determine the explosive-proof grade of equipment; And be not suitable for the gas station and use.Utility model patent CN102580993A discloses a kind of organic polluted soil based technique for in-situ remediation, the main auxiliary soil vapor extraction technology of Steam Heating that adopts is repaired organic polluted soil, mainly is made of steam generation and injected system, soil vapor extraction system, ground waste gas Waste Water Treatment; The problems such as have equally the apparatus and process system complex, equipment investment cost is large, and operation energy consumption is large; Tail gas adopts the catalytic combustion mode to process, and more is not suitable for the on-the-spot use in gas station.
In the introducing mode above-mentioned technology contents is incorporated in the application.
The utility model content
The purpose of this utility model is, provide a kind of light oil to pollute the in-situ repairing device of unsaturation band soil, it is by the suction to VOCs in the soil and SVOCs, the microbial augmentation degraded degrades to reach the purpose that light oil is removed fast with chemical oxidation, reduces because the gas station that soil pollution causes and the environmental risk of near zone thereof.
Above-mentioned purpose of the present utility model can adopt following technical proposal to realize:
A kind of light oil pollutes the in-situ repairing device of unsaturation band soil, and described device comprises: underground wen system, and it comprises extraction well, injector well and ventilation monitoring well, and described extraction well has the extracting well head, and described injector well has the injection well head; Pipe-line system, it comprises extraction tube group, transportation pipe, the first imbibition pipeline, the first injection pipeline, the second imbibition pipeline and the second injection pipeline; Ground Processing System, it comprises: oil gas extracting and processing module, it includes vavuum pump, catch pot and oil gas adsorption tanks, the entrance of described catch pot is connected with described extracting well head by the extraction tube group, the outlet of described catch pot is connected by the entrance of transportation pipe with the oil gas adsorption tanks, be connected with vavuum pump on the described transportation pipe, the outlet of described oil gas adsorption tanks communicates with atmosphere; Microbial augmentation is repaired module, it comprises microorganism and nutrient solution tank, be equiped with the first injection liquid in described microorganism and the nutrient solution tank, described microorganism is connected with the entrance of the first injection measurement pump by the first imbibition pipeline with the nutrient solution tank, and described the first injection measurement delivery side of pump is connected with described injection well head by the first injection pipeline; Chemical oxidation is repaired module, it comprises the chemical oxidizing agent batch tank, be equiped with the second injection liquid in the described chemical oxidizing agent batch tank, described chemical oxidizing agent batch tank is connected with the entrance of described the second injection measurement pump by the second imbibition pipeline, and described the second injection measurement delivery side of pump is connected with described injection well head by the second injection pipeline.
Aforesaid light oil pollutes the in-situ repairing device of unsaturation band soil, each pipeline in described extraction tube group, transportation pipe, the first imbibition pipeline, the first injection pipeline, the second imbibition pipeline and the second injection pipeline is respectively rubber hose, have liner in the described rubber hose, described liner is steel-wire carcass.
Aforesaid light oil pollutes the in-situ repairing device of unsaturation band soil, described microbial augmentation is repaired module and is further comprised the first agitator, the first liquid filter, the first control valve and the first fire-proof motor, described the first fire-proof motor is electrically connected on the upper end of the first agitator, described the first agitator is connected on described microorganism and the nutrient solution tank, and the lower end of the first agitator is positioned at described microorganism and nutrient solution tank, the upper end of described the first agitator is positioned at the outside of described microorganism and nutrient solution tank, connects successively described the first control valve and first liquid filter on described the first imbibition pipeline.
Aforesaid light oil pollutes the in-situ repairing device of unsaturation band soil, described chemical oxidation is repaired module and is further comprised the second agitator, the second liquid filter, the second control valve and the second fire-proof motor, described the second fire-proof motor is electrically connected on the upper end of the second agitator, described the second agitator is connected on the described chemical oxidizing agent batch tank, and the lower end of the second agitator is positioned at described chemical oxidizing agent batch tank, the upper end of described the second agitator is positioned at the outside of described chemical oxidizing agent batch tank, connects successively described the second control valve and second liquid filter on described the second imbibition pipeline.
Aforesaid light oil pollutes the in-situ repairing device of unsaturation band soil, described extraction tube group comprises horizontal extracting house steward, vertical extracting house steward, a plurality of horizontal extracting arms, a plurality of vertical extracting arms, described horizontal extracting house steward's a end connects the entrance of described oil gas adsorption tanks, horizontal extracting house steward's other end vertical connecting extracting house steward's upper end, described vertical extracting house steward's lower end connects the outlet of described catch pot, one end of described each horizontal extracting arm connects respectively each vertical extracting arm accordingly, the other end of each horizontal extracting arm connects described extracting well head, the other end of described each vertical extracting arm connects described horizontal extracting house steward, described horizontal extracting house steward or vertical extracting house steward are provided with described vavuum pump, carry and take out house steward's pneumatic filter, extracting house steward control valve and extracting house steward emptying valve are connected with respectively extracting arm control valve on each horizontal extracting arm or the vertical extracting arm and flowmeter for pipe is propped up in extracting; Described transportation pipe comprises transportation pipe, and described transportation pipe is provided with transportation pipe control valve, transportation pipe flowmeter and the emptying valve of transportation pipe, and described transportation pipe flowmeter is arranged on after the described vavuum pump; The outlet of described oil gas adsorption tanks connects the purified gas delivery pipe.
Aforesaid light oil pollutes the in-situ repairing device of unsaturation band soil, and the bottom of described catch pot and oil gas adsorption tanks is respectively equipped with sewage draining valve.
Characteristics of the present utility model and advantage are:
1, the unsaturation band soil that pollutes for light oil, its in-situ remediation method and device have reduced investment, rehabilitation expense is low, repairing efficiency is short, reparation rapidly and efficiently, the succinct advantage of technological process.
2, it can be implemented in the function of removing more thoroughly in the unsaturation band soil take gasoline (VOCs is as main), diesel oil (SVOCs is as main) pollutant.Utilize soil vapor extraction, remove fast the gaseous contaminant in the soil, the ADSORPTION STATE pollutant also can transfer gaseous state to and be sucked removing under negative pressure.Residual ADSORPTION STATE pollutant can be gaseous contaminant and be sucked again removal by the microbial augmentation Degradation and Transformation.Residual heavier contaminant component can be degraded to VOCs or mineralising by chemical oxidation, to finish the light oil contaminated soil is repaired fast, thoroughly.
But 3, its EM equipment module that can satisfy with limited function, the most succinct effective process combination, the quickest and repair mode is thoroughly realized the optimized reparation target of technical and economic performance.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is that the master of the Ground Processing System of the light oil of the present utility model in-situ repairing device that pollutes unsaturation band soil looks schematic diagram;
Fig. 2 is the schematic top plan view of the Ground Processing System of the light oil of the present utility model in-situ repairing device that pollutes unsaturation band soil;
Fig. 3 is that schematic diagram is looked on the right side of the W-W line of Fig. 1;
Fig. 4 is that the master of the F-F line of Fig. 2 looks schematic diagram;
Fig. 5 is the schematic diagram of the suction well decomposing state of the light oil of the present utility model in-situ repairing device that pollutes unsaturation band soil;
Fig. 6 is the schematic diagram that the suction well group of the in-situ repairing device of light oil pollution unsaturation band soil of the present utility model closes state;
Fig. 7 is the schematic diagram of the injector well decomposing state of the light oil of the present utility model in-situ repairing device that pollutes unsaturation band soil;
Fig. 8 is the schematic diagram of the injector well assembled state of the light oil of the present utility model in-situ repairing device that pollutes unsaturation band soil.
The specific embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figures 1 to 4, the utility model embodiment has proposed the in-situ repairing device that a kind of light oil pollutes unsaturation band soil, and it comprises underground wen system, pipe-line system and Ground Processing System.Described underground wen system comprises extraction well 17, injector well 18 and ventilation monitoring well, and described extraction well 17 has the extracting well head, and described injector well 18 has the injection well head.Described pipe-line system comprises extraction tube group 1, transportation pipe 2a, the first imbibition pipeline 3, the first injection pipeline 4, the second imbibition pipeline 5 and the second injection pipeline 6.Described Ground Processing System comprises that oil gas extracting and processing module 7, microbial augmentation are repaired module 8, chemical oxidation is repaired module 9.Described oil gas extracting and processing module 7 include vavuum pump 7a, catch pot 7b and oil gas adsorption tanks 7c, the entrance of described catch pot 7b is connected with described extracting well head by extraction tube group 1, the outlet of described catch pot 7b is connected with the entrance of oil gas adsorption tanks 7c by transportation pipe 2a, be connected with vavuum pump 7a on the described transportation pipe 2a, the outlet of described oil gas adsorption tanks 7c communicates with atmosphere.Described microbial augmentation is repaired module 8 and is comprised microorganism and nutrient solution tank 8a, be equiped with the first injection liquid in described microorganism and the nutrient solution tank 8a, described microorganism is connected by the entrance of the first imbibition pipeline 3 with the first injection measurement pump 8b with nutrient solution tank 8a, the outlet of described the first injection measurement pump 8b is connected with described injection well head by the first injection pipeline 4, the first injection liquid being injected unsaturation band soil, in the unsaturation band soil after suction residual SVOCs carry out the microbial augmentation degraded.Described chemical oxidation is repaired module 9 and is comprised chemical oxidizing agent batch tank 9a, be equiped with the second injection liquid in the described chemical oxidizing agent batch tank 9a, described chemical oxidizing agent batch tank 9a is connected with the entrance of described the second injection measurement pump 9b by the second imbibition pipeline 5, the outlet of described the second injection measurement pump 9b is connected with described injection well head by the second injection pipeline 6, the second injection liquid being injected unsaturation band soil, carry out oxidative degradation to residual after the microbial augmentation degraded in the unsaturation band soil than heavy contaminant.
Present embodiment can aspirate near VOCs (the volatile organic compounds in the soil extraction well by oil gas extracting and processing module 7, VOC), SVOCs (semivolatile-organic-chemicals, semi-volatile organic matter) and a small amount of moisture and Soil fine particles, by microbial augmentation repair module 8 can in the soil after suction residual SVOCs carry out the microbial augmentation degraded, repair module 9 by chemical oxidation and can carry out oxidative degradation than heavy contaminant to residual after the microbial augmentation degraded in the soil.That is to say, present embodiment combines the in-situ remediation methods such as gaseous phase of soil suction, microbial augmentation degraded and chemical oxidation degraded, can realize the rapidly and efficiently thoroughly reparation to the light oil contaminated soil, reduce because the gas station that soil pollution causes and the environmental risk of near zone thereof.
Wherein, described vavuum pump 7a can be explosion-proof vortex vavuum pump, and described catch pot 7b can be the cyclone-type catch pot, and described oil gas adsorption tanks 7c can be packing type oil gas adsorption tanks.In the oil gas adsorption tanks 7c active carbon bed 7d is housed.
According to an embodiment of the present utility model, each pipeline in described extraction tube group 1, transportation pipe 2a, the first imbibition pipeline 3, the first injection pipeline 4, the second imbibition pipeline 5 and the second injection pipeline 6 is respectively rubber hose, have liner in the described rubber hose, described liner is steel-wire carcass.
According to an embodiment of the present utility model, described the first injection liquid is oil degradation bacteria and nutritive salt mixed liquor, the composition quality percentage of described oil degradation bacteria and nutritive salt mixed liquor is: urea 2.1-3.0%, potassium dihydrogen phosphate 0.7-1.0%, metabolism matrix alpha-lactose 0.3-0.5% altogether, biosurfactant production oil degradation bacteria liquid 1.0-1.5%, all the other are fresh water.
Described the second injection liquid is oxidizing agent solution, and described oxidizing agent solution composition quality percentage is: potassium peroxydisulfate 3-5%, or the hydrogen peroxide 5-10% of 30% concentration, all the other are fresh water.
According to an embodiment of the present utility model, described microbial augmentation is repaired module 8 and is further comprised the first agitator 8c, first liquid filter 8d, the first control valve 8e and the first fire-proof motor 8f, described the first fire-proof motor 8f is electrically connected on the upper end of the first agitator 8c, described the first agitator 8c is connected on described microorganism and the nutrient solution tank 8a, and the lower end of the first agitator 8c is positioned at described microorganism and nutrient solution tank 8a, so that described the first injection liquid is stirred, the upper end of described the first agitator 8c is positioned at the outside of described microorganism and nutrient solution tank 8a, connects successively described the first control valve 8e and first liquid filter 8d on described the first imbibition pipeline 3.
The first fire-proof motor 8f drives the first agitator 8c rotation in the present embodiment, the first agitator 8c stirs the first injection liquid, the first injection liquid that configures is after first liquid filter 8d removes solid impurity, after the first injection measurement pump 8b pressurization, inject injector well by the injection well head again, and infiltrate through near the unsaturation band soil of injector well, carry out the microbial augmentation degraded to aspirating rear residual SVOCs.
Described chemical oxidation is repaired module 9 and is further comprised the second agitator 9c, second liquid filter 9d, the second control valve 9e and the second fire-proof motor 9f, described the second fire-proof motor 9f is electrically connected on the upper end of the second agitator 9c, described the second agitator 9c is connected on the described chemical oxidizing agent batch tank 9a, and the lower end of the second agitator 9c is positioned at described chemical oxidizing agent batch tank 9a, so that the second injection liquid is stirred, the upper end of described the second agitator 9c is positioned at the outside of described chemical oxidizing agent batch tank 9a, connects successively described the second control valve 9e and second liquid filter 9d on described the second imbibition pipeline 5.
The second fire-proof motor 9f drives the second agitator 9c rotation in the present embodiment, the second agitator 9c stirs the second injection liquid, the second injection liquid that configures is after second liquid filter 9d removes solid impurity, after the second injection measurement pump 9b pressurization, inject injector well by the injection well head again, and infiltrate through near the injector well unsaturation band soil, carry out oxidative degradation to residual after the microbial augmentation degraded than heavy contaminant.
Described first liquid filter 8d and second liquid filter 9d can be respectively y-type filter.
According to an embodiment of the present utility model, described extraction tube group 1 comprises horizontal extracting house steward 1a, vertical extracting house steward 1b, a plurality of horizontal extracting arm 1c, a plurality of vertical extracting arm 1d, the end of described horizontal extracting house steward 1a connects the entrance of described oil gas adsorption tanks 7c, the upper end of the other end vertical connecting extracting house steward 1b of horizontal extracting house steward 1a, the lower end of described vertical extracting house steward 1b connects the outlet of described catch pot 7b, the end of described each horizontal extracting arm 1c connects respectively each vertical extracting arm 1d accordingly, the other end of each horizontal extracting arm 1c connects described extracting well head, the other end of described each vertical extracting arm 1d connects described horizontal extracting house steward 1a, described horizontal extracting house steward 1a or vertical extracting house steward 1b are provided with extracting house steward pneumatic filter 1e, extracting house steward control valve 1f and extracting house steward emptying valve 1g are connected with respectively extracting arm control valve 1h on each horizontal extracting arm 1c or the vertical extracting arm 1d and flowmeter for pipe 1i is propped up in extracting.Described transportation pipe 2a is provided with transportation pipe control valve 2b, transportation pipe flowmeter 2c and the emptying valve 2d of transportation pipe, and described transportation pipe flowmeter 2c is arranged on after the vavuum pump 7a.The outlet of described oil gas adsorption tanks 7c connects purified gas delivery pipe 2f.
The operation of oil gas extracting and processing module specifically can be in the present embodiment: after vortex vavuum pump 7a starts, in each extraction well, produce negative pressure, near the extraction well in the soil VOCs, SVOCs and a small amount of moisture and Soil fine particles enter horizontal extracting arm 1c and vertical extracting arm 1d at first successively through the suction well head, prop up to compile behind the flowmeter for pipe 1i through extracting to enter horizontal extracting house steward 1a and vertical extracting house steward 1b; Then enter cyclone-type catch pot 7b and separate moisture and Soil fine particles, remove remaining Soil fine particles through extracting house steward pneumatic filter 1e again, transfer malleation to behind the residual gas suction vortex vavuum pump 7a, after entering packing type oil gas adsorption tanks 7c purification again after transportation pipe 2a is through transportation pipe flowmeter 2c, 2f enters atmospheric environment by the purified gas delivery pipe.
The bottom of described catch pot 7b and oil gas adsorption tanks 7b is respectively equipped with sewage draining valve 7e.The sewage draining valve 7e that dirt in catch pot 7b and the oil gas adsorption tanks 7b passes through respectively separately discharges.
In addition, described oil gas extracting and processing module 7, microbial augmentation are repaired module 8, chemical oxidation is repaired module 9 and supporting electrical control cabinet 11, gang of wells assembly and storage cabinet 12 thereof, all can be arranged in the container 13, but so quick transition of implement device, assembling and startup.Furthermore, electrical control cabinet 11, vortex vavuum pump 7a, first and second injection measurement pump 8b, 9b, the electrical equipment such as first and second agitator 8c, 9c and parts are all explosion-proof, and explosive-proof grade can be Exde IIBT4, to satisfy gas station's site safety needs.
Described the first injection measurement pump 8b and the lower of the second injection measurement pump 9b can arrange respectively yielding rubber pad 10.In container 13, also explosion-proof axial flow fan 14 can be set.Respectively form 15 can be set on described catch pot 7b and the oil gas adsorption tanks 7c, to observe the situation in the tank.Near described microorganism and nutrient solution tank 8a and the chemical oxidizing agent batch tank 9a explosion-proof lamp 16 can be set.
According to an embodiment of the present utility model, such as Fig. 5-shown in Figure 8, described extraction well 17, injector well 18 and ventilation monitoring well consist of by well screen assembly 19a and wellbore assembly 19b, aboveground is a wellbore assembly 19a, the bottom is several well screen assemblies 19b, and the length of well is by the control of increase and decrease well screen assembly 19b quantity.Between pit shaft and the well sieve, the well sieve with between well sieves to be threaded.The top of extraction well 17 is extraction tube 17a, and the top of injector well 18 is injection-tube 18a.
Characteristics and the advantage of the utility model embodiment are as follows:
1, it is applicable to the reparation that gas station's light oil pollutes unsaturation band soil, and specifically, being applicable to VOCs, the SVOCs such as gasoline, diesel oil is the light-end products of representative, and the unsaturation band soil darker apart from level of ground water.
2, on application prospect, as integration apparatus, be suitable as very much the auxiliary facility of gas station, the light oil contaminated soil that has occured is repaired fast; Also can be used as the supporting emergency service of gas station, in case oil leak occurs, can carry out fast emergency processing.
3, combine the in-situ remediation methods such as gaseous phase of soil suction, microbial augmentation degraded and chemical oxidation degraded, can realize rapidly and efficiently repairing thoroughly the light oil contaminated soil.
4, device characteristic: integrated, modularization starts rapidly, and transition is convenient.Explosive-proof grade is high, and repairing does not affect gas station's business.
Embodiment 2
Present embodiment has proposed the in-situ remediation method that a kind of light oil pollutes unsaturation band soil, and described method comprises step:
A, soil pollution scene, gas station is explored and sampling analysis, arrange quantity, distribution and the degree of depth of extraction well, injector well and ventilation monitoring well according to soil property and pollutant distribution situation;
The operation of B, oil gas extracting and processing module 7: vavuum pump 7a produces negative pressure after starting in each extraction well, and near VOCs, the SVOCs the extraction well in the soil and a small amount of moisture and Soil fine particles enter described extraction tube group 1 through described extracting well head; Enter described catch pot 7b via described extraction tube group 1 and separate moisture and Soil fine particles, transfer malleation to after sucking described vavuum pump 7a, enter through described transportation pipe 2a again and enter atmospheric environment after described oil gas adsorption tanks 7b purifies;
C, microbial augmentation are repaired the operation of module 8: the first injection liquid is prepared in described microorganism and compounding tank 8a, the first injection liquid injects unsaturation band soil by described injection well head and described injector well again after described the first injection measurement pump 8b pressurization, carry out the microbial augmentation degraded to aspirating rear residual SVOCs;
D, chemical oxidation are repaired the operation of module 9: the second injection liquid is prepared in chemical oxidizing agent preparing tank 9a, after described the second injection measurement pump 9b pressurization, inject unsaturation band soil by described injection well head and described injector well again, carry out oxidative degradation to the microbial augmentation degraded is residual afterwards than heavy contaminant.
According to an embodiment of the present utility model, when the described microbial augmentation among the described step C was repaired the module operation, described oil gas extracting and processing module be simultaneously operation also, thought that the underground oxygen supply promotes microbial degradation.
When the described chemical oxidation among the described step D was repaired the module operation, described oil gas extracting and processing module be simultaneously operation also, thought the degraded of underground oxygen supply accelerating oxidation.
The below provides a specific embodiment and further specifies implementation step of the present utility model:
Present embodiment is to finish at scene, gas station, Pulandian City, Dalian.Through reconnoitring and detecting analysis, pollution type is gasoline, diesel oil combined pollution, and soil property is dauk.
(1) underground wen system is installed.Totally 13 mouthfuls of on-the-spot well spacing, well depth is about 4.5m on average.Wherein extraction well is 4 mouthfuls, 4 mouthfuls of injector wells, ventilation monitoring Jing6Kou; And at extraction well installation extracting well head, at injector well the injection well head is installed.
(2) aspiration line and the fluid injection pipeline between the underground wen system of connection and the Ground Processing System, specifically extraction tube group 1, transportation pipe 2a, the first imbibition pipeline 3, the first injection pipeline 4, the second imbibition pipeline 5 and the second injection pipeline 6.
(3) oil gas extracting repairing phase: oil gas extracting and processing module 7 isolated operations, aspiration vacuum level-0.02MPa, individual well aspiration rate 30-50m3/h.Module adopts the automated manner operation, behind every operation 30min, and standby 120min, so circulation is carried out repeatedly.Oil gas extracting reparation totally 45 days.
(4) microbial augmentation repairing phase: divide 3 batches, inject altogether about 360L of oil degradation bacteria and nutritive salt mixed liquor, its composition quality percentage is: urea 2.4%, potassium dihydrogen phosphate 0.8%, metabolism matrix alpha-lactose 0.4% altogether, biosurfactant production degradation bacteria liquid 1.5%, all the other are fresh water.Oil gas extracting and processing module 7 operate to subsequently the underground oxygen supply and promote microbial degradation, aspiration vacuum level-0.025MPa, individual well aspiration rate 10-15m3/h; The operation of employing automated manner, behind every operation 60min, standby 60min, so circulation is carried out repeatedly.Microbial augmentation reparation totally 90 days.
(5) chemical enhanced repairing phase: divide 5 batches, inject altogether about 250L of oxidizing agent solution, its composition quality percentage is: potassium peroxydisulfate 5%, all the other are fresh water.The oil gas suction cooperates operation suction degraded to produce with processing module 7 VOCs, aspiration vacuum level-0.02MPa, individual well aspiration rate 30-50m3/h; The operation of employing automated manner, behind every operation 30min, standby 150min, so circulation is carried out repeatedly.Chemical enhanced repairing phase totally 15 days.
In cycle, the soil oil content was down in the average 3000mg/kg by initial average 25000mg/kg 150 days field repair.Illustrate that the in-situ remediation method of functions such as being compounded with the degraded of soil vapor extraction, microbial augmentation and chemical oxidation degraded and device can be rapidly and efficiently, and repair more thoroughly the unsaturation band soil that light oil pollutes.
Other structures, operation principle and the beneficial effect of present embodiment is identical with embodiment 1, does not repeat them here.
The above only is several embodiment of the present utility model, and those skilled in the art can carry out various changes to the utility model embodiment according to application documents are disclosed, modification or combination and do not break away from spirit and scope of the present utility model.
Claims (6)
1. a light oil pollutes the in-situ repairing device of unsaturation band soil, it is characterized in that described device comprises: underground wen system, it comprises extraction well, injector well and ventilation monitoring well, described extraction well has the extracting well head, and described injector well has the injection well head;
Pipe-line system, it comprises extraction tube group, transportation pipe, the first imbibition pipeline, the first injection pipeline, the second imbibition pipeline and the second injection pipeline;
Ground Processing System, it comprises:
Oil gas extracting and processing module, it includes vavuum pump, catch pot and oil gas adsorption tanks, the entrance of described catch pot is connected with described extracting well head by the extraction tube group, the outlet of described catch pot is connected by the entrance of transportation pipe with the oil gas adsorption tanks, be connected with vavuum pump on the described transportation pipe, the outlet of described oil gas adsorption tanks communicates with atmosphere;
Microbial augmentation is repaired module, it comprises microorganism and nutrient solution tank, be equiped with the first injection liquid in described microorganism and the nutrient solution tank, described microorganism is connected with the entrance of the first injection measurement pump by the first imbibition pipeline with the nutrient solution tank, and described the first injection measurement delivery side of pump is connected with described injection well head by the first injection pipeline;
Chemical oxidation is repaired module, it comprises the chemical oxidizing agent batch tank, be equiped with the second injection liquid in the described chemical oxidizing agent batch tank, described chemical oxidizing agent batch tank is connected with the entrance of described the second injection measurement pump by the second imbibition pipeline, and described the second injection measurement delivery side of pump is connected with described injection well head by the second injection pipeline.
2. light oil according to claim 1 pollutes the in-situ repairing device of unsaturation band soil, it is characterized in that, each pipeline in described extraction tube group, transportation pipe, the first imbibition pipeline, the first injection pipeline, the second imbibition pipeline and the second injection pipeline is respectively rubber hose, have liner in the described rubber hose, described liner is steel-wire carcass.
3. light oil according to claim 1 pollutes the in-situ repairing device of unsaturation band soil, it is characterized in that, described microbial augmentation is repaired module and is further comprised the first agitator, the first liquid filter, the first control valve and the first fire-proof motor, described the first fire-proof motor is electrically connected on the upper end of the first agitator, described the first agitator is connected on described microorganism and the nutrient solution tank, and the lower end of the first agitator is positioned at described microorganism and nutrient solution tank, the upper end of described the first agitator is positioned at the outside of described microorganism and nutrient solution tank, connects successively described the first control valve and first liquid filter on described the first imbibition pipeline.
4. light oil according to claim 1 pollutes the in-situ repairing device of unsaturation band soil, it is characterized in that, described chemical oxidation is repaired module and is further comprised the second agitator, the second liquid filter, the second control valve and the second fire-proof motor, described the second fire-proof motor is electrically connected on the upper end of the second agitator, described the second agitator is connected on the described chemical oxidizing agent batch tank, and the lower end of the second agitator is positioned at described chemical oxidizing agent batch tank, the upper end of described the second agitator is positioned at the outside of described chemical oxidizing agent batch tank, connects successively described the second control valve and second liquid filter on described the second imbibition pipeline.
5. light oil according to claim 1 pollutes the in-situ repairing device of unsaturation band soil, it is characterized in that, described extraction tube group comprises horizontal extracting house steward, vertical extracting house steward, a plurality of horizontal extracting arms, a plurality of vertical extracting arms, described horizontal extracting house steward's a end connects the entrance of described oil gas adsorption tanks, horizontal extracting house steward's other end vertical connecting extracting house steward's upper end, described vertical extracting house steward's lower end connects the outlet of described catch pot, one end of described each horizontal extracting arm connects respectively each vertical extracting arm accordingly, the other end of each horizontal extracting arm connects described extracting well head, the other end of described each vertical extracting arm connects described horizontal extracting house steward, described horizontal extracting house steward or vertical extracting house steward are provided with described vavuum pump, carry and take out house steward's pneumatic filter, extracting house steward control valve and extracting house steward emptying valve are connected with respectively extracting arm control valve on each horizontal extracting arm or the vertical extracting arm and flowmeter for pipe is propped up in extracting;
Described transportation pipe is provided with transportation pipe control valve, transportation pipe flowmeter and the emptying valve of transportation pipe, and described transportation pipe flowmeter is arranged on after the described vavuum pump;
The outlet of described oil gas adsorption tanks connects the purified gas delivery pipe.
6. light oil according to claim 1 pollutes the in-situ repairing device of unsaturation band soil, it is characterized in that the bottom of described catch pot and oil gas adsorption tanks is respectively equipped with sewage draining valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320104512 CN203235746U (en) | 2013-03-07 | 2013-03-07 | In-situ remediation device for unsaturated zone soil with light oil pollution |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320104512 CN203235746U (en) | 2013-03-07 | 2013-03-07 | In-situ remediation device for unsaturated zone soil with light oil pollution |
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| CN203235746U true CN203235746U (en) | 2013-10-16 |
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| CN 201320104512 Expired - Fee Related CN203235746U (en) | 2013-03-07 | 2013-03-07 | In-situ remediation device for unsaturated zone soil with light oil pollution |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103170497A (en) * | 2013-03-07 | 2013-06-26 | 中国石油天然气集团公司 | Light oil polluted unsaturated zone soil in-situ remediation apparatus and method thereof |
| CN104874592A (en) * | 2015-03-18 | 2015-09-02 | 江苏盖亚环境工程有限公司 | In situ multi-phase extraction system for contaminated soil |
-
2013
- 2013-03-07 CN CN 201320104512 patent/CN203235746U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103170497A (en) * | 2013-03-07 | 2013-06-26 | 中国石油天然气集团公司 | Light oil polluted unsaturated zone soil in-situ remediation apparatus and method thereof |
| CN104874592A (en) * | 2015-03-18 | 2015-09-02 | 江苏盖亚环境工程有限公司 | In situ multi-phase extraction system for contaminated soil |
| CN104874592B (en) * | 2015-03-18 | 2018-05-08 | 江苏盖亚环境科技股份有限公司 | A kind of contaminated soil original position multiphase extraction system |
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