CN104973632B - A kind of soil and subsoil water Landfill Leachate Pollution in-situ immobilization analog - Google Patents
A kind of soil and subsoil water Landfill Leachate Pollution in-situ immobilization analog Download PDFInfo
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Abstract
The invention discloses a kind of soil and subsoil water Landfill Leachate Pollution in-situ immobilization analog, including intake pool, percolate seepage groove, multistage permeable reactive barrier, aquiclude, water-bearing layer and outlet pipe, wherein percolate seepage bottom land is provided with some apertures, Pollution Plume catching sheet, perforated wall, sieve plate and connecting tube are provided with multistage permeable reactive barrier, device end is connected with several outlet pipes, the series n of described multistage permeable reactive barrier according to percolate physicochemical characteristic and repairs target determination, and n is natural number.The present invention can reduce by the gap between Landfill Leachate Pollution soil and subsoil water in-situ immobilization laboratory simulation environment and actual place repairing environment, more relevantly reflection soil and subsoil water Landfill Leachate Pollution in-situ immobilization situation, the engineer applied for soil and subsoil water Landfill Leachate Pollution based technique for in-situ remediation provides objective theoretical reference.
Description
Technical field
The present invention relates to a kind of pollution processes analog, relate more specifically to a kind of soil and subsoil water percolate
Pollution in-situ immobilization analog.
Background technology
Soil and subsoil water are precious resources for the survival of mankind.Since entering industrialized society, just occur in that soil
Earth and the pollution problem of subsoil water, and start to aggravate last century 60, the seventies.In view of soil and underground water pollution is serious
Property, the developed country such as America and Europe has put into substantial amounts of manpower and materials and contaminated soil has been studied with groundwater remediation technology.Pollution
Soil is divided into showering and two kinds of in-situ immobilization from groundwater remediation technology according to the different of processing mode.
Contaminated soil is excavated, transports, stacks, purifies by conventional soil pollution showering technology, then recycles.This
Not only processing cost is high to plant showering, and is difficult to administer deep soil and soil and all contaminated place of subsoil water, no
Method repairs the contaminated soil below building or the contaminated site against important building.
The groundwater remediation of early stage adopts dystopy to process, such as pump-and-treat system method.This technology is passed through to catch in subsoil water
Pollution pinnule simultaneously draws it out ground, then using other treatment technologies by after Water warfare using or re-enter underground.Extract out
The Polluted area of subsoil water can be efficiently controlled in out well upstream by processing method, but processes the application of subsoil water at the scene
Result and research show, want thoroughly to repair the subsoil water of pollution, and pump-and-treat system system often will run several years or even decades,
The enormous costs such as its required power consumption, equipment operation and maintenance.Additionally, for preventing a large amount of extractions of subsoil water from causing
Ground settlement, also need, using pouring in down a chimney technology, to be more the increase in capital consumption.
Therefore, soil and underground water pollution based technique for in-situ remediation are current soil and underground water pollution control technical research
Focus, not only processing cost saving relatively, but also soil surface treatment facility can be reduced, reduce the disturbance to environment.
Permeable reactive barrier is a passive in-situ treatment area, fill in treatment region reaction material can degrade and
Retentate stream passes through the pollution components in the subsoil water of this body of wall, thus reaching reparation purpose.Compared with other based technique for in-situ remediation,
Its great advantage is not need any additionaling power device, ground processing facility, and Active reaction medium consumes very slowly, can grow
Phase plays reparation efficiency effectively, installs with long term monitoring so that in addition to observation repairing effect except the initial stage, appoints with little need for other
What expense.
At present, the soil of the developed country such as America and Europe and subsoil water Landfill Leachate Pollution based technique for in-situ remediation are more ripe
And put into operation, and the research of China, still in the experimental study stage, mainly includes place applied research and laboratory at present
Research.Before place is applied, laboratory research is the necessary stage evaluating certain recovery technique.Most of laboratory researches are led to
Cross column test to simulate Polluted Groundwater moving in water-bearing layer and analyze the removal efficiency of pollutant, but this mode mould
The soil intended still has larger gap with subsoil water in-situ immobilization environment and actual environment.
Content of the invention
For above-mentioned technical problem, present invention is primarily targeted at providing a kind of soil dirty with subsoil water percolate
Dye in-situ immobilization analog, to reduce the difference between polluted soil and subsoil water in-situ immobilization simulated environment and actual environment
Away from more relevantly reflection soil and subsoil water Landfill Leachate Pollution in-situ immobilization situation, can be soil and subsoil water rubbish
The engineer applied of rubbish leachate contamination based technique for in-situ remediation provides objective theoretical reference.
To achieve these goals, present invention employs following technical scheme：
The invention provides a kind of soil and subsoil water Landfill Leachate Pollution in-situ immobilization analog, described simulation dress
Put including intake pool, percolate seepage groove, monitoring well, multistage permeable reactive barrier, aquiclude, water-bearing layer and water outlet
Pipe it is characterised in that
Described intake pool is separated using sieve plate with the other parts of described analog, and described floor lever of sieve tray is stained with high density
Nylon screen；
Described aquiclude and water-bearing layer, are formed in the described analog in addition to intake pool；
Described percolate seepage groove is located at the front end of the described analog in addition to intake pool, if its bottom is provided with
Dry aperture, penetrates through for percolate；
Multiple monitoring wells, are distributed across in the described analog in addition to intake pool, for described analog
It is monitored；
Some multistage permeable reactive barriers, are arranged on the water (flow) direction in the described analog in addition to intake pool
On, described multistage permeable reactive barrier is by Pollution Plume catching sheet, first order permeable reactive barrier, the permeable reaction in the second level
Grid, until n-th grade of permeable reactive barrier composition, the series n of wherein said multistage permeable reactive barrier oozes according to rubbish
Filtrate physicochemical characteristic and reparation target determine, n is natural number；
Some outlet pipes, positioned at the end of described analog.
Wherein, it is marked with the percolate at the scene of taking from described percolate seepage groove or according to percolate composition
The artificial percolate prepared.
Wherein, it is provided with on-line monitoring equipment, dynamic monitoring water level, flow velocity, temperature, pH, dissolved oxygen, electricity in described monitoring well
Conductance and oxidation-reduction potential, are provided with probe tube at described monitoring well different depth.
Wherein, other regions of the described analog in addition to intake pool are followed successively by upper, middle and lower-ranking from top,
Upper and lower two-layer loads the clay formation aquiclude that particle diameter is less than 0.25mm, and it is 0.5～2.0mm's that intermediate layer is filled with particle diameter
The grains of sand form water-bearing layer.
The head height of wherein said outlet pipe is adjusted according to actual needs.
Wherein, described Pollution Plume catching sheet is made up of the stable water proof material of physicochemical properties, and described Pollution Plume intercepts
Plate is tightly connected with described first order permeable reactive barrier outer wall, and is inserted perpendicularly into the described aquiclude of water-bearing layer bottom
In.
Wherein, the arc less than 180 ° between described Pollution Plume catching sheet for the described first order permeable reactive barrier
Wall area is provided with some apertures, and described arc wall area surface is stained with high density nylon screen；The described first order is permeable
Remaining region of reaction grid wall is the stable water proof material of physicochemical properties；
Described first order permeable reactive barrier internal vertical inserts two pieces of sieve plates, is reaction filler between described sieve plate；
And
Front end sieve plate is integrally provided with some apertures, and rear end sieve plate bottom 1/3rd region is provided with some apertures, described sieve
Plate surface is stained with high density nylon screen.
Wherein, described first order permeable reactive barrier and follow-up second level permeable reactive barrier are connected by several
Adapter connects；
Described second level permeable reactive barrier internal vertical inserts two pieces of sieve plates, is reaction filler between described sieve plate；
Sieve plate described in two pieces is integrally equipped with some apertures, and described floor lever of sieve tray is stained with high density nylon screen；And
In the permeable reactive barrier of the described second level rear end sieve plate corresponding be less than 180 ° of arc wall area be provided with some
Aperture, described arc wall area surface is stained with high density nylon screen, described second level permeable reactive barrier wall remaining
Region is the stable water proof material of physicochemical properties.
Wherein, when multistage permeable reactive barrier series n is more than 2, second level permeable reactive barrier is used as
Rear stage grid；Adjacent two-stage permeable reactive barrier is connected by several connecting tubes；Between the first order and afterbody
Permeable reactive barrier wall is impermeable material, and described permeable reactive barrier internal vertical inserts two pieces of sieve plates, described sieve
It is reaction filler between plate；Front end sieve plate is integrally provided with some apertures, and rear end sieve plate bottom 1/3rd region is provided with some little
Hole, described floor lever of sieve tray is stained with high density nylon screen.
Wherein, the mesh of described high density nylon screen is between 200-800 mesh.
Understood based on technique scheme, the invention has the advantages that and beneficial effect：(1) assembly of the invention structure
Simply ingenious, making is simple and convenient to operate, with low cost；(2) react the sum of series reaction medium of grid in assembly of the invention
Can be adjusted flexibly it is adaptable to be studied by the subsoil water based technique for in-situ remediation of heterogeneity Landfill Leachate Pollution；(3) present invention dress
Put and simulate soil and subsoil water Landfill Leachate Pollution in-situ immobilization environment, including aeration zone water-bearing layer hydrogeological characteristics,
The action mode of seepage action of ground water situation, percolate leakage pollution process and permeable reactive barrier, can for soil with
The engineer applied of subsoil water Landfill Leachate Pollution based technique for in-situ remediation provides theoretical reference.
Brief description
Fig. 1 is the plane graph of the pollution in-situ immobilization analog of the present invention；
Fig. 2 is the A-A profile of the pollution in-situ immobilization analog of the present invention；
Fig. 3 is 7, the 8- node diagram of the pollution in-situ immobilization analog of the present invention；
Fig. 4 is the 9- node diagram of the pollution in-situ immobilization analog of the present invention.
Specific embodiment
For making the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in further detail.
The present invention pollution in-situ immobilization analog operation principle be：Subsoil water is pressed certain flow injection water inlet
Pond, simulates artesian water or phreatic aquifer by controlling intake pool height of water level.With certain flow, percolate is injected
Percolate seepage groove, percolate is to seepage in aeration zone and water-bearing layer.Subsoil water is entered from intake pool in the way of seepage flow
Aeration zone and water-bearing layer, are mixed to form Pollution Plume with the percolate of seepage, are intercepted by reaction grid afterwards, finally from water outlet
Pipe flow goes out, and thus completes the simulation process of whole soil and subsoil water Landfill Leachate Pollution in-situ immobilization.
More specifically, the invention discloses a kind of soil and subsoil water Landfill Leachate Pollution in-situ immobilization analog,
As shown in the plane graph of Fig. 1 and the A-A profile of Fig. 2, described analog include intake pool 1, percolate seepage groove 3,
Monitoring well 2, Pollution Plume catching sheet 4, multistage permeable reactive barrier 5,6, aquiclude 12, water-bearing layer 13 and outlet pipe 11.Its
In, permeable reactive barrier is provided with perforated wall 7, sieve plate 8,9 and connecting tube 10.
Intake pool 1 is separated using sieve plate with device other parts, and sieve plate 8-9 surface is stained with high density nylon screen.
Percolate seepage groove 3 bottom sets some apertures, is wherein marked with the percolate at the scene of taking from, or according to oozing
The artificial percolate prepared of filtrate component.
Be provided with on-line monitoring equipment in monitoring well 2, dynamic monitoring water level, flow velocity, temperature, pH, dissolved oxygen, electrical conductivity and
Oxidation-reduction potential.Probe tube is set at monitoring well different depth.
Device other region in addition to intake pool is followed successively by upper, middle and lower-ranking from top, and upper and lower two-layer loads grain
Footpath is less than the clay of 0.25mm, and intermediate layer is filled with the coarse sand that particle diameter is 0.5～2.0mm.
Device end connects 3 outlet pipes 11, and outlet pipeline outlet water at tail end open height can be adjusted.
Multistage permeable reactive barrier is by Pollution Plume catching sheet 4,5, the two grades of permeable reactions of one-level permeable reactive barrier
Grid 6 and n-th grade of permeable reactive barrier composition.The series of multistage permeable reactive barrier is according to percolate physics
Chemical feature and reparation target determine.
Pollution Plume catching sheet 4 is made up of the stable water proof material of physicochemical properties, and catching sheet is permeable with the first order anti-
Answer grid outer wall to be tightly connected, and be inserted perpendicularly into water-bearing layer bottom aquiclude.
One-level permeable reactive barrier 5 setting less than 180 ° of arc wall area between Pollution Plume catching sheet is some little
Hole, this region surface is stained with high density nylon screen；Remaining region of grid wall is the stable water proof material of physicochemical properties.
One-level permeable reactive barrier internal vertical inserts two pieces of sieve plate 8-9, is reaction filler between sieve plate；7,8- node as Fig. 3
Shown in the 9- node diagram of figure and Fig. 4, front end sieve plate 8 is overall to set some apertures, and rear end sieve plate 9 bottom 1/3rd region sets some
Aperture, floor lever of sieve tray is stained with high density nylon screen.
One-level permeable reactive barrier 5 is connected by 3 connecting tubes 10 with follow-up two grades of permeable reactive barriers 6.Two
Level permeable reactive barrier internal vertical inserts two pieces of sieve plates 9, is reaction filler between sieve plate；Two pieces of sieve plates are integrally all provided with some
Aperture, floor lever of sieve tray is stained with high density nylon screen.In two grades of permeable reactive barriers, rear end sieve plate is corresponding is less than 180 ° of arcs
Shape wall area sets some apertures, and this region surface is stained with high density nylon screen；Remaining region of grid wall is physical chemistry
The water proof material of stable in properties.
When multistage permeable reactive barrier series is more than 2, two grades of permeable reactive barriers 6 are as afterbody grid.
Adjacent two-stage permeable reactive barrier is connected by 3 connecting tubes 10.Grid wall between the first order and afterbody is
Impermeable material, grid internal vertical inserts two pieces of sieve plate 8-9, is reaction filler between sieve plate；Front end sieve plate 8 entirety sets some
Aperture, rear end sieve plate 9 bottom 1/3rd region sets some apertures, and floor lever of sieve tray is stained with high density nylon screen.
In the present invention, the device other region in addition to intake pool is followed successively by upper, middle and lower-ranking from top, and upper and lower two
Layer filling particle diameter is less than the clay of 0.25mm, simulates the less aquiclude of infiltration coefficient 12 (aeration zone and water proof bottom respectively
Plate)；Intermediate layer is filled with the coarse sand that particle diameter is 0.5～2.0mm, the larger water-bearing layer 13 of simulation infiltration coefficient, and water-bearing layer is pressed suitable
The uneven arrangement of gradient, thus be more nearly actual place characteristics on Aquifer.
Uniform cloth hole on perforate wall and sieve plate, aperture is 3-5mm, and pitch of holes is 5-10mm；Perforate wall and sieve plate table
Face is stained with the nylon screen that aperture is 200-800 mesh.Being stained with the perforate wall of nylon screen and the Main Function of sieve plate is to prevent
Clay and coarse sand enter tank and reaction grid, prevent from reacting the reaction mediums such as the filler in grid and enter aeration zone and aqueous
Layer.
Different types of reaction filler has been dosed, the sum of series reaction wire feeding of reaction grid is by rubbish in reaction grid
Percolate physicochemical characteristic and reparation target determine.The Main Function of reaction grid is to percolate using active medium
Polluted underground water is repaired.
In the present invention, outlet pipe water outlet height is adjustable, thus adjusts water inlet pool water level.When water inlet pool water level is higher than aqueous
During layer top, thus simulate artesian water water level 14；When pool water level of intaking is less than water-bearing layer top, by this simulated diving water level
15.
Particular embodiments described above, has carried out detailed further to the purpose of the present invention, technical scheme and beneficial effect
Describing in detail bright it should be understood that the foregoing is only the specific embodiment of the present invention, being not limited to the present invention, all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement done etc., should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of soil and subsoil water Landfill Leachate Pollution in-situ immobilization analog, described analog include intake pool,
Percolate seepage groove, monitoring well, multistage permeable reactive barrier, aquiclude, water-bearing layer and outlet pipe, its feature exists
In,
Described intake pool is separated using sieve plate with the other parts of described analog, and described floor lever of sieve tray is stained with high density nylon
Screen cloth；
Described aquiclude and water-bearing layer, are formed in the described analog in addition to intake pool；
Described percolate seepage groove is located at the front end of the described analog in addition to intake pool, and its bottom is provided with some little
Hole, penetrates through for percolate；
Multiple monitoring wells, are distributed across in the described analog in addition to intake pool, for carrying out to described analog
Monitoring；
Some multistage permeable reactive barriers, are arranged in the water (flow) direction in the described analog in addition to intake pool, institute
State multistage permeable reactive barrier by Pollution Plume catching sheet, first order permeable reactive barrier, second level permeable reactive barrier,
Until n-th grade of permeable reactive barrier composition, the series n of wherein said multistage permeable reactive barrier is according to percolate thing
Physicochemical feature and reparation target determine, n is natural number；
Some outlet pipes, positioned at the end of described analog.
2. soil as claimed in claim 1 and subsoil water Landfill Leachate Pollution in-situ immobilization analog, wherein said rubbish
It is marked with the percolate at the scene of taking from or according to the artificial garbage filter prepared of percolate composition in rubbish leakage of leachate groove
Liquid.
3. soil as claimed in claim 1 and subsoil water Landfill Leachate Pollution in-situ immobilization analog, wherein said prison
It is provided with on-line monitoring equipment in well logging, dynamic monitoring water level, flow velocity, temperature, pH, dissolved oxygen, electrical conductivity and oxidation-reduction potential,
It is provided with probe tube at described monitoring well different depth.
4. soil as claimed in claim 1 and subsoil water Landfill Leachate Pollution in-situ immobilization analog, wherein removes water inlet
Other regions of the described analog outside pond are followed successively by upper, middle and lower-ranking from top, and upper and lower two-layer filling particle diameter is little
Clay in 0.25mm forms aquiclude, and intermediate layer is filled with the grains of sand that particle diameter is 0.5～2.0mm and forms water-bearing layer.
5. soil as claimed in claim 1 and subsoil water Landfill Leachate Pollution in-situ immobilization analog, wherein said go out
The head height of water pipe is adjusted according to actual needs.
6. soil as claimed in claim 1 and subsoil water Landfill Leachate Pollution in-situ immobilization analog, wherein said dirt
Dye plumage catching sheet is made up of the stable water proof material of physicochemical properties, and described Pollution Plume catching sheet is permeable with the described first order
Reaction grid outer wall is tightly connected, and is inserted perpendicularly in the described aquiclude of water-bearing layer bottom.
7. soil as claimed in claim 6 and subsoil water Landfill Leachate Pollution in-situ immobilization analog, wherein said the
Arc wall area less than 180 ° between described Pollution Plume catching sheet for the one-level permeable reactive barrier is provided with some little
Hole, described arc wall area surface is stained with high density nylon screen；Remaining area of described first order permeable reactive barrier wall
Domain is the stable water proof material of physicochemical properties；
Described first order permeable reactive barrier internal vertical inserts two pieces of sieve plates, is reaction filler between described sieve plate；And
Front end sieve plate is integrally provided with some apertures, and rear end sieve plate bottom 1/3rd region is provided with some apertures, described sieve plate table
Face is stained with high density nylon screen.
8. soil as claimed in claim 7 and subsoil water Landfill Leachate Pollution in-situ immobilization analog, wherein when multistage
When permeable reactive barrier series n is equal to 2, described first order permeable reactive barrier and the permeable reaction in follow-up second level lattice
Grid are connected by several connecting tubes；
Described second level permeable reactive barrier internal vertical inserts two pieces of sieve plates, is reaction filler between described sieve plate；
Sieve plate described in two pieces is integrally equipped with some apertures, and described floor lever of sieve tray is stained with high density nylon screen；And
In the permeable reactive barrier of the described second level, rear end sieve plate is corresponding is less than 180 ° of arc wall area and is provided with some apertures,
Described arc wall area surface is stained with high density nylon screen, and remaining region of described second level permeable reactive barrier wall is
The stable water proof material of physicochemical properties.
9. soil as claimed in claim 7 and subsoil water Landfill Leachate Pollution in-situ immobilization analog, wherein when multistage
When permeable reactive barrier series n is more than 2, adjacent two-stage permeable reactive barrier is connected by several connecting tubes, and uses
Second level permeable reactive barrier is as afterbody grid；
Described second level permeable reactive barrier internal vertical inserts two pieces of sieve plates, is reaction filler between described sieve plate；Two pieces
Sieve plate is integrally equipped with some apertures, and described floor lever of sieve tray is stained with high density nylon screen；The permeable reaction lattice in the described second level
In grid, rear end sieve plate is corresponding is less than 180 ° of arc wall area and is provided with some apertures, and described arc wall area surface is stained with height
Density nylon screen cloth, remaining region of described second level permeable reactive barrier wall is the stable water proof material of physicochemical properties
Material；And
Permeable reactive barrier wall in addition to the first order and afterbody is impermeable material, described permeable reaction lattice
Grid internal vertical inserts two pieces of sieve plates, is reaction filler between described sieve plate；Front end sieve plate is integrally provided with some apertures, and rear end is sieved
Plate bottom 1/3rd region is provided with some apertures, and described floor lever of sieve tray is stained with high density nylon screen.
10. soil as claimed in claim 9 and subsoil water Landfill Leachate Pollution in-situ immobilization analog, wherein said height
The mesh of density nylon screen cloth is between 200-800 mesh.
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| CN106517407B (en) * | 2016-12-06 | 2019-07-12 | 成都理工大学 | A kind of method that activity diafiltration wall technology repairs groundwater pollution of refuse landfill |
| CN110409405B (en) * | 2019-07-05 | 2020-06-16 | 中国科学院南京土壤研究所 | Well construction method for underground water monitoring well in PRB wall |
| CN110947752A (en) * | 2019-12-25 | 2020-04-03 | 中国电建集团中南勘测设计研究院有限公司 | In-situ chemical oxidation remediation device for simulating polluted underground water and using method |
| CN112718830B (en) * | 2020-12-09 | 2023-03-21 | 森特士兴集团股份有限公司 | Soil and groundwater restoration simulation system based on in-situ steam injection |
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| CA2024869C (en) * | 1990-09-07 | 1996-12-31 | John Davis | Landfill site with leachate collection |
| CN1785536B (en) * | 2005-10-21 | 2010-05-12 | 同济大学 | On site environment restoring method of demestic garbage loading embedding field |
| CN203033844U (en) * | 2012-12-26 | 2013-07-03 | 中国地质大学（北京） | Groundwater pollution in-situ remediation simulator |
| CN103613236B (en) * | 2013-12-04 | 2014-12-10 | 中国环境科学研究院 | Meandering steam type groundwater pollution repairing device |
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