CN106370804A - Three-dimensional visible simulation device for simulating migration and transformation of pollutants in porous media in underground environment - Google Patents
Three-dimensional visible simulation device for simulating migration and transformation of pollutants in porous media in underground environment Download PDFInfo
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- CN106370804A CN106370804A CN201610802188.0A CN201610802188A CN106370804A CN 106370804 A CN106370804 A CN 106370804A CN 201610802188 A CN201610802188 A CN 201610802188A CN 106370804 A CN106370804 A CN 106370804A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
Abstract
The invention discloses a three-dimensional visible simulation device for simulating migration and transformation of pollutants in porous media in an underground environment. The three-dimensional visible simulation device comprises a water supply device, a simulation device and a water storage device which are sequentially connected. The simulation device is a square tank with an upper cover. Two stainless steel screen devices in the tank divide the interior space of the tank into a water inlet pool, a water bearing layer and a water outlet pool. The water supply device is connected with the water inlet pool. The water storage device is connected with the water outlet pool. Sampling devices are arranged on the side wall, in the region of the water bearing layer, of the tank and the upper cover respectively. The three-dimensional visible simulation device has the advantages that through design of different types of filling media, underground heterogeneous water bearing layers are simulated, conditions, such as running water field, of underground water bearing layers are set, and a scientific and reasonable sampling method is designed; the concentration of pollutants, tracer agents and the like at different water levels are monitored continuously, and distribution and transformation of the target pollutants at different time in different space are analyzed; the three-dimensional visible simulation device is suitable for three-dimensional research on migration and transformation of the pollutants in the underground saturated heterogeneous water-bearing layer environment.
Description
Technical field
The present invention relates to soil and groundwater pollution amelioration field and in particular in a kind of simulation underground environment pollutant exist
The three-dimensional visible analog of Migration in Porous Media conversion.
Background technology
Soil and groundwater, as important natural resourcess, is safeguarding China's economic society sound development and ecological environment etc.
Aspect has played important function.However, with the fast development of economic society, soil and groundwater pollution is but on the rise.Right
Pollution amelioration in soil and groundwater be unable to do without transfer behavior in underground environment for the pollutant and transformation rule research, theoretical
On can obtain the spatial and temporal distributions of pollutant levels and hydrogeologic condition by setting up field large-scale experiment field, in conjunction with numerical model
Simulation and forecast contamination characteristics and reparation rule, but there is the features such as complex operation, high cost in the intensive sampling of field in-situ test,
It is difficult to carry out.Therefore, can be ground by the feasible groundwater environment assay device of the science of building come simulating pollution thing Transport
Lower water prevention and cure of pollution work provides technological guidance.
It is the system of a three-dimensional, hydrologic condition complexity for groundwater environment, interior is in groundwater environment at present
The transfer behavior research of pollutant is limited primarily to one-dimensional column test or two-dimensional flume analog, and for non-equal in underground environment
The research that matter water-bearing layer affects contaminant transportation rule is relatively fewer, so that it is difficult to truly reflect field hydrogeology situation.
The macroscopic heterogeneity in water-bearing layer have impact on the migration of pollutant, and macroscopic heterogeneity stratum is generally carried and low permeable by height is permeable
Band closely interlock so that pollutant in permeable band based on convection current, low permeable band with molecule diffusion based on, when high permeable band
When pollutant levels are less than low permeable band concentration, pollutant will return high permeable band by diffusion, therefore, in this kind of system
Depollution thing required time is more long.In such system of simulation study, the three dimension scale transfer behavior of pollutant is particularly urgent, and this will
There is provided parameter to instruct for soil and groundwater pollution amelioration in underground environment, can select for recovery technique and conceptual design provides
Theory support.Additionally, the sampling method (as sampling frequency, sample volume and sample rate) of target contaminant is right in analog
Very big in the flowing water field impact in water-bearing layer, rational sampling method is most important for the accuracy of simulation.And existing apparatus
It mostly is the material such as lucite and pvc, because of pollutant such as its composition lipids containing phthalandione, lead to not carry out grinding of partial organic substances
Study carefully, the type material may contain poisonous additive and plasticizer, aging after easily cause environmental pollution and harm experimenter's health.
It is thus desirable to select a kind of large scale analog in order to simulate subsurface three-dimensional hydrological environment, and by arranging pollutant input side
The conditions such as formula, Filled Dielectrics device, sampler, pollutant testing apparatus, the sample volume of appropriate design and sample rate etc.
Parameter is so that this invention can simulate the migration of pollutant and Study on Transformation in saturation heterogeneous body water-bearing layer by three dimension scale.
Content of the invention
The technical problem solving: present invention aim at being directed to above-mentioned Shortcomings, provide in a kind of simulation underground environment
The three-dimensional visible analog that pollutant convert in Migration in Porous Media.This device passes through to design different types of filled media
To simulate underground heterogeneous body water-bearing layer, the condition such as different flowing water fields of setting underground reservoir, the design science reasonably side of sampling
Method, the continuous monitoring difference pollutant of water level and tracer isoconcentration simultaneously, analysis target contaminant is in different time, space
Distribution is with conversion it is adaptable to three dimension scale studies Transport And Transformation in underground porous medium for the pollutant.
A kind of technical scheme: the three-dimensional visible simulation dress that in simulation underground environment, pollutant convert in Migration in Porous Media
Put, including the water supply installation being sequentially connected, analog and water-storing device, described analog is one and carries the square of upper lid
Space in cell body is divided into into pond, water-bearing layer and discharge bay by two stainless steel cloth devices in cell body by cell body, described
Water supply installation is connected with entering pond, and described water-storing device is connected with discharge bay, and cell body be located at water-bearing layer region side wall on
And on cover and be equipped with one group of thieff hatch, sampling in the hole is provided with sampling apparatuses.
Described water supply installation is connected with entering pond pipeline by the peristaltic pump with effusion meter.
Described discharge bay is provided with three outlet pipes, described outlet pipe by four-way pipe import a total outlet pipe after with water-retention
Device connects, and described total outlet pipe is provided with two-port valve and sampling valve.
It is provided with dividing plate, described dividing plate is used for fix-head in described water-storing device.
Described sampling apparatuses are the 19-gauge rustless steel sampling probe with female Luer, and one end of sampling probe is by cell body side
Wall or upper lid are inserted perpendicularly into water-bearing layer, and the other end is connected with the check valve with female Luer, and the external tapping of check valve is provided with Shandong
That syringe.
Described stainless steel cloth device is constituted by wrapping up in outside rustless steel pipe support, stainless steel cloth and rustless steel pipe support, rustless steel
Wrap up in outside pipe support and be fixed on rustless steel pipe support, wrap outside described rustless steel pipe support and be provided with groove, in stainless steel cloth insertion groove,
And can slide in groove.
In go-cart, go-cart bottom is provided with deflecting roller to described analog, and each deflecting roller is equipped with brake unit.
The poly (methyl methacrylate) plate for thick 10mm is covered, glass plate is provided with the hole that aperture is 3mm, longitudinal pitch of holes is on described
10cm, horizontal pitch of holes is 15cm.
The a length of 120cm of described water-bearing layer analog, a width of 60cm, a height of 85cm.
Described sampling apparatuses depth interval is centrosymmetric distribution, wherein shallow sampling on two relative side walls, oneself
Upper and lower often row number 2-3-4-3-2 of pressing is arranged, deep sampling, on the wall of single side, presses often row number 4-5-4 cloth from top to bottom
Put.
Beneficial effect: 1. apparatus of the present invention at utmost can be opened in proportion according to the hydrological geological conditions in field study area
Physical simulating device in exhibition room, in view of the complex situations of groundwater environment, this three-dimensional simulation device more can accurately reflect field
Actual hydrogeologic condition, disclosure satisfy that the multidimensional migration demand of pollutant in underground water pollution reparation, makes research have more reality
Representativeness and specific aim.2. the side that in this experimental provision, water-bearing layer device is combined using the sampling of cell body top and the sampling of side wall
Formula, on the one hand avoids affecting the firm of device because Side wall drill hole is excessive, increased the safety of device, decrease side wall simultaneously
Boring and the cost installing sample cock, top sampling setting also improves the efficiency of sampling.3. pass through to lay certain pore size
Sampling probe, the suitable sample rate of setting and sampling frequency, more scientifically in simulated groundwater environment, the migration of pollutant is advised
Rule.4. in this experimental provision, the cell body material of water-bearing layer device is non-safety glass, and it has water-wetted surface, it is to avoid preferential stream
Produce, the adaptability expanded range to pollutant, can cover the simulation study of all categories organic pollution in addition.5. this is real
In experiment device, the bottom device of water-bearing layer cell body and dismountable bracing means of cell body surrounding are deposited by setting so that being somebody's turn to do
Experimental provision has more preferable mobility and steadiness.6. in this experimental provision, fixing stainless steel silk in the cell body of water-bearing layer
Net separation screen device, can according to simulation study difference filled media needs, carry out changing the stainless steel cloth in required aperture so that
The selection of packed layer is more flexible and convenient.7. present configuration flexible design, detection data accurately, can largely reduce
Contaminant transportation and the cost of conversion simulation, improve the work efficiency of simulation study, are with a wide range of applications.
Brief description
Fig. 1 is the structural representation of this analog；
Fig. 2 is separation screen device schematic diagram in this analog；
Fig. 3 is cell body stabilizing bracket structure schematic diagram in this analog；
Fig. 4 is this mobile analog bracket groove body sidewall sampler schematic diagram (vertical view).
Water supply installation 1, analog 2, water-storing device 3, stainless steel cloth device 4, enter pond 5, water-bearing layer 6, discharge bay
7th, upper lid thieff hatch 8, peristaltic pump 9, outlet pipe 10, four-way pipe 11, two-port valve 12, sampling valve 13, dividing plate 14, side wall thieff hatch
15th, rustless steel pipe support 16, stainless steel cloth 17, wrap up in 18, go-cart 19, deflecting roller 20, brake unit 21, screw outside rustless steel pipe support
22nd, screw rod 23, stainless steel framework 24, the 19-gauge rustless steel sampling probe 25 with female Luer, check valve 26, jacketed syringe
27.
Specific embodiment
Following examples only technology design to illustrate the invention and feature, its object is to allow person skilled in the art
It is to will appreciate that present disclosure and implement according to this, can not be limited the scope of the invention with this.All according to the present invention
Equivalent transformation or modification that spirit is done, all should be included within the scope of the present invention.
Embodiment 1
The three-dimensional visible analog that in a kind of simulation underground environment, pollutant convert in Migration in Porous Media, including according to
The water supply installation 1 of secondary connection, analog 2 and water-storing device 3, described analog 2 is a square cell body carrying upper lid,
By two stainless steel cloth devices 4, space in cell body is divided into into pond 5, water-bearing layer 6 and discharge bay 7 in cell body, described
Water supply installation 1 is connected with entering pond 5, and described water-storing device 3 is connected with discharge bay 7, and cell body is located at the side wall in water-bearing layer region
Upper and on cover and be equipped with one group of thieff hatch, sampling in the hole is provided with sampling apparatuses.
Described water supply installation is connected with entering pond pipeline by the peristaltic pump 9 with effusion meter.
Described discharge bay is provided with three outlet pipes 10, described outlet pipe by four-way pipe 11 import a total outlet pipe after with
Water-storing device 3 connects, and described total outlet pipe is provided with two-port valve 12 and sampling valve 13.
It is provided with dividing plate 14, described dividing plate is used for fix-head in described water-storing device.
Described sampling apparatuses are the 19-gauge rustless steel sampling probe 25 with female Luer, and one end of sampling probe is by cell body
Side wall or upper lid are inserted perpendicularly into water-bearing layer, and the other end is connected with the check valve 26 with female Luer, and the external tapping of check valve sets
There is jacketed syringe 27.
Described stainless steel cloth device 4 is constituted by wrapping up in 18 outside rustless steel pipe support 16, stainless steel cloth 17 and rustless steel pipe support,
Wrap up in 18 outside rustless steel pipe support to be fixed on rustless steel pipe support 16, wrap up in 18 outside described rustless steel pipe support and be provided with groove, stainless steel silk
In net 17 insertion groove, and can slide in groove.
In go-cart 19, go-cart bottom is provided with deflecting roller 20 to described analog, and each deflecting roller is equipped with braking dress
Put 21.
The poly (methyl methacrylate) plate for thick 10mm is covered, glass plate is provided with the hole that aperture is 3mm, longitudinal pitch of holes is on described
10cm, horizontal pitch of holes is 15cm.
The a length of 120cm of described water-bearing layer analog, a width of 60cm, a height of 85cm.
Described sampling apparatuses depth interval is centrosymmetric distribution, wherein shallow sampling on two relative side walls, oneself
Upper and lower often row number 2-3-4-3-2 of pressing is arranged, deep sampling, on the wall of single side, presses often row number 4-5-4 cloth from top to bottom
Put.
Embodiment 2
Three-dimensional visible analog that in a kind of simulation underground environment, pollutant convert in Migration in Porous Media and its take
Quadrat method, including water supply installation 1, analog 2 and water-storing device 3.As shown in figure 1, the main body of described mobile analog is
Top carries the square cell body of lid, the water supply installation 1 of storage artificial ground water is placed on platform, by peristaltic pump 9 by fluid
Pump into into pond 5, and wriggling flow rate pump is corrected using effusion meter.Politef BULKHEAD UNION is passed through by outlet pipe in discharge bay end
Connect with discharge bay 7, three outlet pipes 10 import a water pipe by four-way pipe 11, and outlet pipe is connected to two-port valve 12 and sampling valve
13.Water-storing device 3 is finally accessed in water side, is separated for use in fix-head by dividing plate 14, water-storing device 3 is placed in water-storing device
In draw-in groove support with freely-adjustable height.Cell body is formed using the thick non-tempering glass processing of 12mm, in non-armorplate glass
Outside is reinforced by stainless angle steel, and is fixed in bottom removable carts 19, and reinforcing mode is specifically shown in Fig. 3, cell body four
Week is wrapped by stainless steel framework 24 frame, and the stainless steel frame of cell body both sides is made up of the stainless angle steel of thickness 3mm, wide 40mm,
The following of cell body two body side frame is drilled with 3 diameter 10mm holes respectively, is fixed on go-cart 19 bottom by screw 22, in this framework
Corner location has diameter 20mm hole respectively, and in cell body and frame rack filling 5mm thickness cushion, then passing through 4 screw rods 23 will
The framework banding of cell body both sides.Equally, fill 5mm cushion respectively between angle steel and glass at cell body bottom two ends, then
By screw 22, angle steel is fixed in the go-cart 19 of cell body bottom.The go-cart material of slot device bottom is rustless steel, bottom
Equipped with can load-bearing deflecting roller 20, each wheel is equipped with brake unit 21.Wherein stainless steel cloth device such as Fig. 2, by stainless
18 compositions are wrapped up in, rustless steel pipe support nearly water-bearing layer side is equidistantly drilled with 24 outside steel pipe frame 16, stainless steel cloth 17 and stainless steel frame
Individual hole, stainless steel cloth is covered in rustless steel pipe support, is then stuck in wrapping up in outside rustless steel pipe support on rustless steel pipe support, by spiral shell
Fixation combined by silk, finally loads this device in tank, and will wrap up in the place glass cement with glass contact outside rustless steel pipe support
Bind and fix, wrap end outside rustless steel pipe support and leave open slot, being easy to water-bearing layer filling different medium needs to carry out changing difference
The stainless steel cloth in aperture.For the anisotropism of simulation underground saturated aqueous layer, macroscopic heterogeneity common schema is low permeable
The location of band is mutually closely interlocked with high permeable band location.Point two-layer can fill low osmotic medium and grooves respectively, often
The thickness of layer medium is 40cm, and the sampling probe simultaneously passing through to install different length analyzes pollutant in the concentration of different spaces, grinds
Study carefully mass transport coefficient between different infiltration coefficient media for the pollutant, final research pollutant are in saturation heterogeneous body water-bearing layer
Transport.For the sample collecting mode of the present invention, if only with Side wall drill hole sampling mode, need to be in Side wall drill hole 41
Individual, wherein need 13 pieces of 30cm sampling probe, 28 pieces of 15cm sampling probe are installed.If only with top vertical sampling, cannot meet and adopt
Collect the sample of same vertical different depth.For this reason, water-bearing layer sampling apparatuses are divided into side wall setting sampling and top setting sampling, side
Fig. 4 (top view) is shown in by wall sampling apparatuses, and the 19-gauge rustless steel sampling probe 25 with female Luer is inserted perpendicularly into by side wall
Water-bearing layer, and being fixed by glass cement, the outer end of stainless pin and the politef check valve 26 with female Luer
Connect, usually keep valve to be closed.When carrying out intervals collection sample, rotation check valve is to opening shape
State, then carries out sample collecting by the interface that jacketed syringe 27 inserts check valve, primary sample about 2～4ml, and according to filling out
Fill anaerobic condition and certain sample rate is set.It is covered with thick 10mm poly (methyl methacrylate) plate at cell body top, glass plate is drilled with aperture and is
The hole of 3mm, longitudinal pitch of holes is 10cm, and horizontal pitch of holes is 15cm.In this embodiment, a length of 120cm of water-bearing layer analog,
A width of 60cm, a height of 85cm.The described sampling apparatuses depth is spaced the distribution that is centrosymmetric, and wherein shallow sampling is located at relative two
On the wall of side, press often row number 2-3-4-3-2 arrangement from top to bottom, deep sampling, on the wall of single side, presses often row from top to bottom
Number 4-5-4 arrangement.
The water body sample rate (taking hydraulic gradient i=0.005 as a example) of different filled medias in this invention of table 1
This analog, can be by setting in order to meet the demand of the pollutant such as Organic substance transfer behavior in groundwater environment
The different filled medias of the meter and thickness Transport in heterogeneous body water-bearing layer with simulating pollution thing.
The operation principle of the present invention:
This device can be according to the actual hydrogeology on field stratum, and scaled down is to simulate field Different Strata.When grinding
Study carefully target contaminant pollution of area source when transfer behavior, can by by pollutant dilution in subsoil water by the continuous pump of peristaltic pump
Enter cell body, also target contaminant can be positioned in water-bearing layer and study as point-source pollution.Institute is changed according to filled media particle diameter
Need the stainless steel cloth in aperture, pollutant sampling volume is determined according to the analysis method of pollutant, according to the infiltration of filled media
Coefficient and hydraulic gradient setting sample rate.By pollutant and the tracer isoconcentration of the difference water level of continuous monitoring simultaneously, point
Analysis target contaminant is in different time, the distribution in space and conversion it is adaptable to three dimension scale research pollutant are in underground environment
Transport And Transformation.
This analog concrete operation step includes herein below:
(1) seal of analog and steadiness test
The seal of analog and steadiness test are carried out in three steps, and are 1. installing sampling probe and separation screen device first
Before, by the boring of silicone glass cement seal glass cell body, after the solidification of 24h colloid, cell body storage full water test glass plate connects
Place and the sealing effectiveness of boring, and guarantee no to permeate and borehole sealing is functional；2. secondly sampling probe and BULKHEAD UNION are divided
It is not arranged on groove body sidewall and cell body two ends, and fixation is binded by glass cement, then tank water filling test sampling probe and threading
Whether street corner has leakage scenarios；3. guaranteeing above two steps no phenomenon of osmosis, two ends are respectively mounted separation screen device inside tank,
And store the sealing effectiveness of full water check device.
(2) fill heterogeneous body anaerobic condition
In this device, water-bearing layer can be by filling quartz sand or field soil, the medium mould of the different infiltration coefficient of layering filling
Intend the anisotropism of underground reservoir, wherein quartz sand need to be some respectively through the immersion such as certain density nitric acid and sodium hydroxide
Time, then deionized water is clean, and final high temperature is dried；And field soil then needs through drying, pulverizing and sieve
Step is so that the particle diameter of anaerobic condition is about 0.1～0.8mm.Underground is simulated by the medium of the different infiltration coefficient of filling non-
Homogeneous aquifer environment, the infiltration coefficient of anaerobic condition is between 2 × 10-5～6 × 10-1Cm/s, the infiltration in Thief zone water-bearing layer
Coefficient is higher than 10 times of low-permeability water-bearing layer.Filling anaerobic condition selects wet method filling mode, to ensure that water-bearing layer is in all the time
Water-saturated state, it is to avoid the air residual in water-bearing layer.Concrete filling process is the Free water remaining higher than water-bearing layer 5cm
Face, then uniformly lays water-bearing layer by beaker, for keeping the firm of filter, fills diameter in entering pond and discharge bay simultaneously
The cobblestone of 2～4cm, and the packed height of cobblestone is consistent with the packed height in water-bearing layer.
(3) target contaminant and tracer are added
Prepare manual simulation subsoil water mineral nutrition saline solution, a great number of elements (feso in simulated groundwater4、mgso4、
nh4cl、na2hpo4) and trace element (mncl2、cocl2、caso4、znso4Deng), pollutant and tracer can be dissolved in ground
In lower aqueous solution, then groundwater velocity is set according to mensure AQUIFER HYDRAULIC value, and target will be contained by peristaltic pump
The underground aqueous solution of pollutant and tracer is continuously pumped into cell body and enters pond.
(4) pollutant sampling method
After the operating of device normal table, for obtaining time, the space distribution situation of target contaminant and tracer, need to press
It is configured sample volume and sampling frequency according to target contaminant analysis method and groundwater velocity size etc., right for reducing sampling
The impact of aqueous lamellar field, sample rate must not exceed the 5% of cell body water velocity, and the sample rate of this device is in 1～2ml/
Min, on the premise of ensureing that enough samples are used for quantitative chemical analysis, the single sample volume of each thief hole is in 2～4ml.
(5) water-bearing layer is periodically disinfected
For the growth of microorganism in suppression water-bearing layer, a certain amount of formaldehyde is mixed in buffer solution, and passes through peristaltic pump
Periodically carry out washing away water-bearing layer, it is to avoid microbial reproduction metabolism causes to permeability of aquifer and contaminant transportation and conversion behavior
Interference.
Claims (10)
1. the three-dimensional visible analog that in a kind of simulation underground environment, pollutant convert in Migration in Porous Media, its feature exists
Water supply installation (1), analog (2) and the water-storing device (3) being sequentially connected in inclusion, described analog (2) is a band
Have the square cell body of upper lid, in cell body by two stainless steel cloth devices (4) by space in cell body be divided into into pond (5),
Water-bearing layer (6) and discharge bay (7), described water supply installation (1) is connected with entering pond (5), described water-storing device (3) and discharge bay
(7) be connected, and cell body be located on the side wall in water-bearing layer region and on cover and be equipped with one group of thieff hatch, sampling in the hole is provided with adopts
Sampling device.
2. the three-dimensional visible that in simulation underground environment, pollutant convert in Migration in Porous Media according to claim 1 is simulated
Device is it is characterised in that described water supply installation is connected with entering pond pipeline by the peristaltic pump (9) with effusion meter.
3. the three-dimensional visible that in simulation underground environment, pollutant convert in Migration in Porous Media according to claim 1 is simulated
It is characterised in that described discharge bay is provided with three outlet pipes (10), described outlet pipe imports one by four-way pipe (11) to device
It is connected with water-storing device (3) after total outlet pipe, described total outlet pipe is provided with two-port valve (12) and sampling valve (13).
4. the three-dimensional visible that in simulation underground environment, pollutant convert in Migration in Porous Media according to claim 1 is simulated
It is characterised in that being provided with dividing plate (14) in described water-storing device, described dividing plate is used for fix-head to device.
5. the three-dimensional visible that in simulation underground environment, pollutant convert in Migration in Porous Media according to claim 1 is simulated
Device it is characterised in that described sampling apparatuses are 19-gauge rustless steel sampling probe (25) with female Luer, sampling probe
One end is inserted perpendicularly into water-bearing layer by groove body sidewall or upper lid, and the other end is connected with the check valve (26) with female Luer, only leads to
The external tapping of valve is provided with jacketed syringe (27).
6. the three-dimensional visible that in simulation underground environment, pollutant convert in Migration in Porous Media according to claim 1 is simulated
Device is it is characterised in that described stainless steel cloth device (4) is by rustless steel pipe support (16), stainless steel cloth (17) and stainless steel tube
Frame is wrapped up in outward (18) and is constituted, and wraps up in (18) and is fixed on rustless steel pipe support (16), wrap up in outside described rustless steel pipe support outside rustless steel pipe support
(18) it is provided with groove, in stainless steel cloth (17) insertion groove, and can slide in groove.
7. the three-dimensional visible that in simulation underground environment, pollutant convert in Migration in Porous Media according to claim 1 is simulated
It is characterised in that described analog is in go-cart (19), go-cart bottom is provided with deflecting roller (20) to device, and each deflecting roller is equal
It is provided with brake unit (21).
8. the three-dimensional visible that in simulation underground environment, pollutant convert in Migration in Porous Media according to claim 1 is simulated
It is characterised in that covering the poly (methyl methacrylate) plate for thick 10mm on described, glass plate is provided with the hole that aperture is 3mm, longitudinal hole to device
Spacing is 10cm, and horizontal pitch of holes is 15cm.
9. the three-dimensional visible that in simulation underground environment, pollutant convert in Migration in Porous Media according to claim 1 is simulated
Device is it is characterised in that a length of 120cm of described water-bearing layer analog, a width of 60cm, a height of 85cm.
10. the three-dimensional visible mould that in simulation underground environment, pollutant convert in Migration in Porous Media according to claim 1
Intend device it is characterised in that the described sampling apparatuses depth is spaced the distribution that is centrosymmetric, wherein shallow sampling is located at relative two
On the wall of side, press often row number 2-3-4-3-2 arrangement from top to bottom, deep sampling, on the wall of single side, presses often row from top to bottom
Number 4-5-4 arrangement.
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