CN104655816B - A kind of method of the water-bearing zone redox environment simulated experiment based on groundwater dynamic simulation experiment platform - Google Patents
A kind of method of the water-bearing zone redox environment simulated experiment based on groundwater dynamic simulation experiment platform Download PDFInfo
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Abstract
The present invention relates to a kind of method of the water-bearing zone redox environment simulated experiment based on groundwater dynamic simulation experiment platform, specifically groundwater dynamic simulation experiment platform is first set, in described groundwater dynamic simulation experiment platform, be packed into the anaerobic condition of simulating typical hydrogeologic element again, finally on described groundwater dynamic simulation experiment platform, carry out water-bearing zone redox environment simulated experiment.Invention increases the fidelity of simulated experiment, reduce the cost of simulated experiment, research experiment for the recovery technique such as original position aeration process, in situ chemical oxidation technology, biology in situ recovery technique, permeable reaction wall technique of underground water provides a kind of experiment basis reliably, expands the universality of analogue means.
Description
Technical field
The present invention relates to a kind of environmental hydrogeology analogue means and analogy method, the method for specifically a kind of water-bearing zone redox environment simulated experiment based on groundwater dynamic simulation experiment platform.
Background technology
Groundwater resource occupy very important status in China's water resource, play irreplaceable effect safeguarding in ecological environment security and economic society sound development etc.But, along with socio-economic development, the sanitary wastewater refuse, industrial waste water refuse, agriculture pollutants etc. of a large amount of unreasonable discharge, and the unordered exploitation of underground water, a large amount of pollutant is caused to enter groundwater environment, cause aerated zone soil and groundwater contamination further serious, cause groundwater environment pollution problem day by day complicated.
Groundwater contamination is the Tough questions that China faces, and controlling and repairing groundwater contamination is one of important process of water conservation.Unsaturated soil structure is complicated, pollutant is by the effects such as current extremely slowly downward Transport And Transformation, therefore aeration zone is passage of contaminants, also be pollutant storage area, cause pollutant to enter water-bearing zone, and it is all relatively slower to move in water-bearing zone, pollutes and occurs gradually often, after finding groundwater contamination, determine that pollution source also can not show a candle to surface water so easy.Therefore, for many years, numerous researcher constantly carries out the scientific research of groundwater contamination control, and explore this type of problem in science and must rely on corresponding simulated groundwater environmental experiment device, groundwater dynamic analogue means therefore reasonable in design becomes is engaged in groundwater contamination repairing research hot issue.
Research finds, there is following shortcoming in current underground water physical simulating device: first, functionally see that existing analogue means is mostly unilateral for aeration zone or water-bearing zone, lack the organic assembling device of aeration zone and zone of saturation two aspect analog functuion, thus lack pollutant and enter zone of saturation by way of analog monitoring function from aeration zone, contaminant transportation conversion process can not be caught from whole circulation process, cause analogue means to lack globality; Next, field original position carries out experiment and data acquisition is often difficult to realize.
Summary of the invention
Object of the present invention is just to provide a kind of method of the water-bearing zone redox environment simulated experiment based on groundwater dynamic simulation experiment platform, with the problem that the simulated experiment fidelity solving existing analogue means is low and simulated experiment cost is high.
The present invention is achieved in that a kind of method of the water-bearing zone redox environment simulated experiment based on groundwater dynamic simulation experiment platform, groundwater dynamic simulation experiment platform is first set, in described groundwater dynamic simulation experiment platform, be packed into the anaerobic condition of simulating typical hydrogeologic element again, finally on described groundwater dynamic simulation experiment platform, carry out water-bearing zone redox environment simulated experiment.
Described groundwater dynamic simulation experiment platform comprises dynamic analog device, aerator, simulation drench with rain device and middle control computer.
The main body of described dynamic analog device is rectangular box-type shell, and described box-type shell adopts poly (methyl methacrylate) plate to process, and peripheral employing stainless steel square tube is reinforced and supported; In the front panel of described box-type shell and the inner side of squab panel, the spacing of 100mm is provided with some upright spill draw-in grooves, the lower edge of described draw-in groove contacts with the base plate of described box-type shell, the upper edge of described draw-in groove and the suitable for reading concordant of described box-type shell; The porous water dispensing board of a grafting rectangle between two described draw-in grooves that the front panel of described box-type shell is relative with the position on squab panel, the plate face of described porous water dispensing board is densely covered with the overcurrent eyelet that aperture is 2mm, the lower edge of described porous water dispensing board contacts with the base plate of described box-type shell, the upper edge of described porous water dispensing board and the suitable for reading mutually concordant of described box-type shell;
The end side wallboard of described box-type shell is connected to some water inlets that layering is arranged, the sidewall paneling of the other end of described box-type shell is connected to some water delivering orifices that layering is arranged, described water inlet and described water delivering orifice are made by the plexi-glass tubular that aperture is 8mm, in matrix distribution on the sidewall paneling of described box-type shell;
What the front panel and squab panel of described box-type shell be respectively arranged with some layerings arrange is the thief hatch that 8mm plexi-glass tubular is made by aperture, described thief hatch is distributed on front panel corresponding to the separated each sample space of described porous water dispensing board or squab panel, each described thief hatch is provided with sampler or is sealed with sealing plug, the front panel of described box-type shell and the two ends of rear wall be respectively arranged with in longitudinal arrangement one to arrange by aperture be the overflow vent that 8mm plexi-glass tubular is made, at described overflow vent place, sampler is installed or is connected to the run-down pipe being with operation valve,
The base plate of described box-type shell has some draining mudholes, each draining mudhole is connected to a draining discharge pipeline, the pvc pipe of the effective diameter 40mm of described draining spoil disposal is made, stainless steel gauze is sealed with at the inner orifice place of described draining mudhole, described draining discharge pipeline is connected to draining spoil disposal operation valve, and the lower end of all described draining discharge pipelines is received on a draining spoil disposal house steward altogether;
Be provided with chassis in the bottom shelf of described box-type shell, described chassis is connected by some caster support; A collapsible rectangular hanger is respectively connected at the two ends on described chassis, adjustable for height water tank laid by described suspension bracket, a described water tank is connected on the described water inlet of described box-type shell by connecting pipeline, and water tank described in another is connected on the described water delivering orifice of described box-type shell by connecting pipeline; Described connecting pipeline is separately installed with solenoid valve and flowmeter, and the data line on described flowmeter is connected on described middle control computer;
In described box-type shell by the anaerobic condition be filled with in the separated each sample space of described porous water dispensing board for simulating typical hydrogeologic element, monitoring/medicine feeding hole pipe that some pvc pipes being 20mm by caliber are uprightly made is plugged with respectively in each sample space, the bottom of described monitoring/medicine feeding hole pipe contacts with the base plate of described box-type shell, the top of described monitoring/medicine feeding hole pipe and the suitable for reading mutually concordant of described box-type shell; On the tube wall of described monitoring/medicine feeding hole pipe, circumferentially symmetry has four row apertures is the eyelet of 2mm, and often the distance between the upper and lower of row eyelet is 10mm, is enclosed with stainless steel gauze in the outside of described monitoring/medicine feeding hole pipe; Described monitoring/medicine feeding hole pipe inserts wherein for the monitoring probe of on-Line Monitor Device, described monitoring probe is one or several in water quality monitoring probe, water level monitoring probe, pH monitoring probe, oxidation-reduction potential monitoring probe, monitored conductivity probe, temperature monitoring probe and dissolved oxygen DO monitoring probe, the data line of described monitoring probe is connected on described middle control computer, to transmit and to process gathered experiment detection signal.
The suitable for reading of described box-type shell is provided with the gland bonnet that can start or fasten.
Described aerator comprises air supply header, gas-distribution pipe and aeration tube; Described aeration tube has double pore vertically on the pvc pipe that caliber is 10mm, and the aperture of each pore is 1mm, and the pitch-row of every vent port is 5mm, and the center of circle angle of two vent ports is 45 °; Described aeration tube be horizontally set in described box-type shell by the bottom in the separated each sample space of described porous water dispensing board, one end of described aeration tube is connected on the described gas-distribution pipe that is plugged in described box-type shell in each sample space, the upper end of described gas-distribution pipe is connected on the described air supply header that is arranged at above described box-type shell, gas-distribution pipe described in every root is equipped with aeration control valve, described air supply header, by fan blower or high-pressure nitrogen bottle air feed, forms aeration by regulating and controlling described aeration control valve.
The described simulation device that drenches with rain comprises water main, sparge pipe, coiled pipe and the pipe that drenches with rain, the described pipe that drenches with rain comprises a distributive pipe and the some showers be vertically connected on described distributive pipe, the pvc pipe of described shower to be caliber be 10mm, shower has double draining hole vertically, the aperture in each water hole is 1mm, the pitch-row of every osculum is 5mm, and the center of circle angle of two osculums is 45 °; The described pipe that drenches with rain is divided into some groups, shower is wherein horizontally set on the top of described box-type shell, the pipe that often drenches with rain described in group is connected to the lower end of described sparge pipe by described coiled pipe, the upper end of the described sparge pipe of each group is received on described water main altogether, and sparge pipe described in every root is equipped with the operation valve that drenches with rain; Described water main is supplied water by water pump or running water pipe, forms rainfall simulation by the operation valve that drenches with rain described in regulating and controlling.
The packing method of simulating the anaerobic condition of typical hydrogeologic element is, from aeration zone and the anaerobic condition layering collection pedotheque of the studied basin geologic section determined, again 50-200 object refinement drying process are carried out respectively to pedotheque, finally by the geologic structure relation of the pedotheque on the corresponding geographic position that processed according to studied basin, successively evenly insert in all samples space in described box-type shell, the laying depth of the pedotheque of the same anaerobic condition layer inserted in each sample space is substantially identical, and be positioned on the sustained height of described box-type shell, the apical side height of pedotheque is than the suitable for reading low 50mm of described box-type shell.
The method of described water-bearing zone redox environment simulation comprises following operation steps:
The requirement of a, experimentally code is determined to detect position, and insert dissolved oxygen DO monitoring probe in relevant monitoring/medicine feeding hole pipe in described box-type shell, insertion depth according to Experimental Procedures need determine, the data line of each dissolved oxygen DO monitoring probe is all connected on middle control computer; The experimentally position of the requirement determination sample collection of code, the thief hatch that described box-type shell is determined and overflow vent takes off sealing plug respectively and installs sampler;
B, the air supply header on fan blower and described groundwater dynamic simulation experiment platform to be tightly connected, and the requirement of experimentally code, open all or part of aeration control valve;
The parameter request of the aeration intensity of c, experimentally code setting and aeration time etc., start fan blower to be pressurizeed by the anaerobic condition air blast of the described aeration tube in described aerator to filling in described box-type shell, described aeration tube according to set pressure ejection gas, thus has formed oxygen condition or double oxygen condition in anaerobic condition in described box-type shell in described box-type shell;
D, monitored the dissolved oxygen conditions of anaerobic condition in described box-type shell in real time by dissolved oxygen monitor, according to the change of dissolved oxygen conditions, the parameters such as corresponding adjustment aeration intensity, aeration time, thus aerobic condition required by guarantee Experimental Procedures or double oxygen condition, in groundwater dynamic simulation experiment platform, form the process simulation of aerobic experimental situation or double oxygen experimental situation thus.
Fan blower in step b being changed into nitrogen cylinder receives on described air supply header, and gland bonnet is laid on described box-type shell, cover the suitable for reading of described box-type shell, then repeat step c, d, the process simulation of experimental anaerobic environment can be formed in groundwater dynamic simulation experiment platform.
The present invention can realize the simulation reconstruction of comprehensive Hydrodynamic field, hydrochemical field, can be used for the discussion of water quality evolution mechanism, also can be used for Transport And Transformation simulated experiment in water-bearing zone of pollutant under different redox environment condition and research rainfall to the dripping simulated experiment of pollutant in aeration zone, the migration process of medicine in aerated zone soil and water-bearing zone can be observed clearly by on-Line Monitor Device, be convenient to analyse in depth solute transfer in aerated zone soil and water-bearing zone of medicine under different redox environment condition and transportion and transformation.
Invention increases the fidelity of simulated experiment, reduce the cost of simulated experiment, research experiment for the recovery technique such as original position aeration process, in situ chemical oxidation technology, biology in situ recovery technique, permeable reaction wall technique of underground water provides a kind of experiment basis reliably, expands the universality of analogue means.
Accompanying drawing explanation
The structural representation of Fig. 1 groundwater dynamic simulation experiment platform.
Fig. 2 is the plan structure schematic diagram of box-type shell.
Fig. 3 is the floor plan of pipe of drenching with rain.
Fig. 4 is the floor plan of aeration tube.
In figure: 1, box-type shell, 2, water inlet, 3, overflow vent, 4, aeration control valve, 5, drench with rain pipe, 6, drench with rain operation valve, 7, coiled pipe, 8, gas-distribution pipe, 9, thief hatch, 10, water delivering orifice, 11, draw-in groove, 12, chassis, 13, draining discharge pipeline, 14, draining spoil disposal operation valve, 15, castor, 16, suspension bracket, 17, water main, 18, sparge pipe, 19, air supply header, 20, draining spoil disposal house steward, 21, monitoring/medicine feeding hole pipe, 22, draining mudhole, 23, porous water dispensing board, 24, aeration tube, 25, the dosing mouth of pipe.
Embodiment
The water-bearing zone redox environment analogue experiment method that the present invention is based on groundwater dynamic simulation experiment platform is, groundwater dynamic simulation experiment platform is first set, in described groundwater dynamic simulation experiment platform, be packed into the anaerobic condition of simulating typical hydrogeologic element, described groundwater dynamic simulation experiment platform carries out water-bearing zone redox environment simulated experiment.
Described groundwater dynamic simulation experiment platform includes dynamic analog device, aerator, simulation drench with rain device and middle control computer etc. four part.
As shown in Figure 1, the main body of described dynamic analog device is rectangular box-type shell 1, and it is that poly (methyl methacrylate) plate processes that box-type shell 1 adopts 10mm thick, reinforces and support in the periphery of poly (methyl methacrylate) plate by stainless steel square tube.In the front panel of box-type shell 1 and the inner side of squab panel, the spacing of 100mm is provided with some upright spill draw-in grooves (Fig. 2), the lower edge of draw-in groove 11 contacts with the base plate of box-type shell 1, the upper edge of draw-in groove 11 and the suitable for reading concordant of box-type shell 1.The porous water dispensing board 23 of a grafting rectangle between two draw-in grooves 11 that the front panel of box-type shell 1 is relative with the position on squab panel, the plate face of porous water dispensing board 23 is densely covered with overcurrent eyelet, the aperture of overcurrent eyelet is 2mm, and pitch-row is 4mm, distributes in plum blossom battle array.The lower edge of porous water dispensing board 23 contacts with the base plate of box-type shell 1, the upper edge of porous water dispensing board 23 and the suitable for reading mutually concordant of box-type shell 1.
The right end sidewalls plate of box-type shell 1 is connected to point five layers of water inlet 2 arranged, and every layer of water inlet has at least two, forms matrix form distribution.The left end side wallboard of box-type shell 1 is connected to point five layers of water delivering orifice 10 arranged, and every layer of water delivering orifice has at least two, forms matrix form distribution.Water inlet 2 and water delivering orifice 10 are made by the plexi-glass tubular that aperture is 8mm.Dynamic analog device is so just made to form the region of intake of underground water, runoff district and discharge area from right to left successively.
In Fig. 1, the front panel and squab panel of box-type shell 1 are respectively arranged with point five layers of thief hatch arranged 9, the plexi-glass tubular that thief hatch 9 is 8mm by aperture is made, and is distributed on front panel corresponding to the separated each sample space of porous water dispensing board 23 or squab panel.Each thief hatch 9 is provided with sampler or is sealed with sealing plug.Be respectively arranged with the row overflow vent 3 in longitudinal arrangement in the front panel of box-type shell 1 and the two ends, left and right of rear wall, overflow vent is that 8mm plexi-glass tubular is made by aperture.At overflow vent 3 place, sampler is installed or is connected to the run-down pipe being with operation valve.
In Fig. 1, the base plate of box-type shell 1 has eight draining mudhole 22(Fig. 2), each draining mudhole 22 is connected to a draining discharge pipeline 13, draining discharge pipeline 13 pvc pipe of diameter 40mm is made, stainless steel gauze is sealed with at the inner orifice place of draining mudhole, draining discharge pipeline 13 is connected to draining spoil disposal operation valve 14, and the lower end of all draining discharge pipelines 13 is received on a horizontal draining spoil disposal house steward 20 altogether.
Be provided with chassis 12 in the bottom shelf of box-type shell 1, chassis 12 is by 6-8 castors 15 support and connection.A collapsible rectangular hanger 16 is respectively connected at the two ends on chassis 12, suspension bracket 16 is laid adjustable for height water tank (not shown), the water tank of right-hand member is connected to by connecting pipeline on the water inlet 2 of box-type shell 1 right-hand member, and the water tank of left end is connected on the water delivering orifice 10 of box-type shell 1 left end by connecting pipeline.Connecting pipeline is separately installed with solenoid valve and flowmeter, and the data line on flowmeter is connected on middle control computer.
In box-type shell 1 by the anaerobic condition be filled with in the separated each sample space of porous water dispensing board 23 for simulating typical hydrogeologic element, in each sample space, be plugged with some monitoring/medicine feeding hole pipes 21 uprightly respectively, the pvc pipe that monitoring/medicine feeding hole pipe 21 is 20mm by caliber is made.The bottom of monitoring/medicine feeding hole pipe 21 contacts with the base plate of box-type shell 1, the top of monitoring/medicine feeding hole pipe 21 and the suitable for reading mutually concordant of box-type shell 1.On the tube wall of monitoring/medicine feeding hole pipe 21, circumferentially symmetry has four row apertures is the eyelet of 2mm, and often the distance between the upper and lower of row eyelet is 10mm.Stainless steel gauze is enclosed with, to prevent silt shutoff eyelet in the outside of monitoring/medicine feeding hole pipe 21.Each monitoring/medicine feeding hole pipe 21 inserts wherein for the monitoring probe in the various on-Line Monitor Device of simulated experiment, described monitoring probe is one or several in the multiple professional monitoring probes such as water quality monitoring probe, water level monitoring probe, pH monitoring probe, oxidation-reduction potential monitoring probe, monitored conductivity probe, temperature monitoring probe and dissolved oxygen DO monitoring probe, can one or several monitoring probes of grafting in a monitoring/medicine feeding hole pipe 21.The data line of monitoring probe is connected on middle control computer, to transmit and to process gathered experiment detection signal.
The present invention is also shaped with a capping box-type shell 1 gland bonnet (not shown) suitable for reading, and gland bonnet can be by gemel connection on box-type shell 1, also can be independent setting, in use suitable for reading to box-type shell 1 of buckle closure.
As Figure 1 and Figure 4, described aerator comprises the parts such as air supply header 19, gas-distribution pipe 8 and aeration tube 24.Aeration tube 24 has double pore vertically on the pvc pipe that caliber is 10mm, and the aperture of each pore is 1mm, and the pitch-row of every vent port is 5mm, and the center of circle angle of two vent ports is 45 °.Aeration tube 24 be horizontally set in box-type shell 1 by the bottom (Fig. 4) in the separated each sample space of porous water dispensing board 23, one end of aeration tube 24 is connected on gas-distribution pipe 8, gas-distribution pipe 8 is plugged on the edge (Fig. 4) of each sample space in box-type shell 1, and the upper end of gas-distribution pipe 8 is connected on the air supply header 19 that is arranged at above box-type shell 1 (Fig. 1).Every root gas-distribution pipe 8 is equipped with aeration control valve 4, and air supply header 19 is connected with fan blower or high-pressure nitrogen bottle, to provide air or nitrogen, under the regulation and control of aeration control valve 4, passes into the air in the water-bearing media in box-type shell 1 or nitrogen formation aeration.
As shown in Figure 1, Figure 3, the described simulation device that drenches with rain is arranged on the top of described dynamic analog device, includes water main 17, sparge pipe 18, coiled pipe 7 and the parts such as pipe 5 that drench with rain.The pipe 5 that drenches with rain comprises a distributive pipe and some showers, and some showers be arranged in parallel, and end is connected with distributive pipe is vertical, forms one group of affixed pipe that drenches with rain.Shower is that the pvc pipe being 10mm by caliber is made, shower has double draining hole vertically, and the aperture in each water hole is 1mm, and the pitch-row of every osculum is 5mm, the center of circle angle of two osculums is 45 °, and the symcenter face of two osculums is arranged vertically downward.The Guan Yousan group that drenches with rain in Fig. 3, is horizontally set on the top of box-type shell 1, and often the group pipe 5 that drenches with rain is connected to the lower end of sparge pipe 18 by a coiled pipe 7, to drench with rain the rational height of pipe suitably to adjust often group; The upper end of sparge pipe 18 is received on a horizontal water main 17 altogether, and every root sparge pipe 18 is equipped with the operation valve 6 that drenches with rain, and the operation valve 6 that drenches with rain is for solenoid valve.Water main 17 connects with water pump or tap water pipe network, is supplied water by water pump or running water pipe, and by regulating and controlling to drench with rain, operation valve 6 forms rainfall simulation.Water main 17 has a dosing mouth of pipe 25(Fig. 1), the mouth of pipe is provided with shutoff, can dosing inwards after opening, by the dripping effect of rainfall, medicine is brought in box-type shell 1, thus the pollution of area source diffusion simulations of continuation can be formed in box-type shell 1.Simulate the device that drenches with rain is lifted on box-type shell 1 top by crane, by the adjustment of crane, make the height of shower distance box-type shell 1 end face between 100 ~ 500mm, also can experimentally require to carry out left and right translation, translation distance can at about 400mm simultaneously.The drench with rain effect of device of simulation is rainfall in simulating natural environment, can simulate the rainfall state occurred in the various physical environments such as light rain, moderate rain, heavy rain, heavy rain.
Middle control computer is a part for whole simulation experiment platform, and its function is real-time, automatic online acquisition and the water cycle process data processing various Sensor monitoring; By the regulation and control to dynamic analog device flow of inlet water and hydraulic pressure, realize the flow of underground water in the anaerobic condition to typical hydrogeologic element, the isoparametric simulation of flow velocity and regulation and control.
Middle control computer, by being arranged at the information acquisition of the monitoring probe of various monitoring device in dynamic analog device, realizes the simulation of hydrodynamic field, Groundwater chemical fields in the anaerobic condition to typical hydrogeologic element in dynamic analog device.
The packing method of the anaerobic condition of the simulation typical case hydrogeologic element in the present invention comprises the following steps:
One, in the box-type shell 1 of dynamic analog device, installation fixes gas-distribution pipe 18, aeration tube 24, monitoring/medicine feeding hole pipe 21, with stainless steel gauze, each monitoring/the suitable for reading of medicine feeding hole pipe is encased, block on the draining mudhole 22 bottom box-type shell with stainless steel gauze again, then each porous water dispensing board 23 is inserted into successively in draw-in groove 11 corresponding in box-type shell 1, box-type shell 1 is divided into some sample spaces.
Two, from aeration zone and the anaerobic condition layering collection pedotheque of the studied basin geologic section determined, the acquisition mode of pedotheque is, according to studied basin geologic section, pedotheque is gathered successively for unsaturated soil structure and anaerobic condition layering, S shape cloth point sampling is generally taked during sampling,, soil fertility little at topography variation comparatively evenly, sampling unit area less, plum blossom also can be adopted to layout sampling; The fetch earth degree of depth and the sampling quantity maintenance uniformity of each sampled point, the upper strata of pedotheque is identical with the ratio of lower floor; The pedotheque gathered puts into sample sack respectively, writes two same labels, each tool one inside and outside sample sack, indicates the information such as sampling position, date, sampling depth, soil name, numbering, carries out sample record simultaneously.
Three, after the pedotheque of layering collection being taken back, refinement drying process is carried out respectively to pedotheque, concrete processing mode is, Homogeneous phase mixing is carried out to the same layer pedotheque of all collections, the all same layer pedotheque being about to gather is placed on Polypropylence Sheet, crush, mixing, pave into square, pedotheque is drawn the diagonal line of two right-angled intersections, pedotheque is divided into four parts, two of diagonal position parts of pedotheques are merged into portion, form two parts of soil samples merged, get a copy of it and continue to employ; The pedotheque of continuing to employ of each layer carries out thinning processing respectively, specifically that pedotheque is fine ground, choose stone foreign material wherein, again pedotheque is placed in drying oven, continuous drying 12 hours at the temperature of 60 DEG C, after drying process, take out in stove, with soil bobbing machine and 50-200 object soil sieves, pedotheque is sieved process.
Four, by the geologic structure relation of the pedotheque on corresponding geographic position dried for refinement according to studied basin, successively evenly insert in all samples space in described box-type shell, the laying depth of the pedotheque of the same anaerobic condition layer inserted in each sample space is substantially identical, and being positioned on the sustained height of described box-type shell, the apical side height of pedotheque is than the suitable for reading low 50mm of described box-type shell.
Five, from water inlet 2 water filling continuously of box-type shell 1, first from undermost water inlet 2 slowly injected clear water, every 24 hours positions to a up conversion water inlet, until transform to the superiors' water inlet and after water filling, make the pedotheque in box-type shell 1 fully moistening to saturated, by slowly intaking from lower to upper, segmentation improves the head of water supply installation, filling material in guard box sandwich type element 1 is full water slowly, whole full water process fully ensures that the gas in porous medium is discharged, and so far groundwater dynamic simulation experiment platform builds complete.
The method of water-bearing zone of the present invention redox environment simulation comprises the following steps:
One, experimentally the requirement of code is determined to detect position, and insert dissolved oxygen DO monitoring probe in relevant monitoring/medicine feeding hole pipe 21 in box-type shell 1, insertion depth according to Experimental Procedures need determine, the data line of each dissolved oxygen DO monitoring probe is all connected on middle control computer.The experimentally position of the requirement determination sample collection of code, the thief hatch that box-type shell 1 is determined and overflow vent takes off sealing plug respectively and installs sampler.
Two, the air supply header 19 on fan blower and groundwater dynamic simulation experiment platform is tightly connected, and the requirement of experimentally code, open all or part of aeration control valve 4;
Three, the experimentally aeration intensity of code setting and the parameter request of aeration time etc., start fan blower to be pressurizeed by the anaerobic condition air blast of the aeration tube 24 in described aerator to filling in box-type shell, aeration tube 24 according to set pressure ejection gas, thus has formed oxygen condition or double oxygen condition in anaerobic condition in box-type shell in box-type shell 1.From the difference of double oxygen condition, good oxygen condition is just that the oxygen level of two states is different, good oxygen condition General Requirements oxygen level remains on more than 2mg/L, and oxygen condition General Requirements oxygen level of holding concurrently remains on 0.2-0.5mg/L.
Four, by the dissolved oxygen conditions of anaerobic condition in the real-time monitoring box sandwich type element of dissolved oxygen monitor, according to the change of dissolved oxygen conditions, the parameters such as corresponding adjustment aeration intensity, aeration time, thus aerobic condition required by guarantee Experimental Procedures or double oxygen condition, the process simulation of aerobic experimental situation or double oxygen experimental situation can be formed thus in groundwater dynamic simulation experiment platform.
Fan blower in step 2 being changed into nitrogen cylinder receives on described air supply header 19, and gland bonnet is laid on box-type shell 1, cover the suitable for reading of box-type shell, then repeat step 3, four, the process simulation of experimental anaerobic environment can be formed in groundwater dynamic simulation experiment platform.Anaerobic state General Requirements dissolved oxygen content is lower than 0.2mg/L.Gland bonnet can be installed gas outlet to ensure the air pressure balance of inside and outside and to stablize.
Claims (1)
1. the method based on the water-bearing zone redox environment simulated experiment of groundwater dynamic simulation experiment platform, it is characterized in that, groundwater dynamic simulation experiment platform is first set, in described groundwater dynamic simulation experiment platform, be packed into the anaerobic condition of simulating typical hydrogeologic element again, finally on described groundwater dynamic simulation experiment platform, carry out water-bearing zone redox environment simulated experiment;
Described groundwater dynamic simulation experiment platform comprises dynamic analog device, aerator, simulation drench with rain device and middle control computer;
The main body of described dynamic analog device is rectangular box-type shell, and described box-type shell adopts poly (methyl methacrylate) plate to process, and peripheral employing stainless steel square tube is reinforced and supported; In the front panel of described box-type shell and the inner side of squab panel, the spacing of 100mm is provided with some upright spill draw-in grooves, the lower edge of described draw-in groove contacts with the base plate of described box-type shell, the upper edge of described draw-in groove and the suitable for reading concordant of described box-type shell; The porous water dispensing board of a grafting rectangle between two described draw-in grooves that the front panel of described box-type shell is relative with the position on squab panel, the plate face of described porous water dispensing board is densely covered with the overcurrent eyelet that aperture is 2mm, the lower edge of described porous water dispensing board contacts with the base plate of described box-type shell, the upper edge of described porous water dispensing board and the suitable for reading mutually concordant of described box-type shell;
The end side wallboard of described box-type shell is connected to some water inlets that layering is arranged, the sidewall paneling of the other end of described box-type shell is connected to some water delivering orifices that layering is arranged, described water inlet and described water delivering orifice are made by the plexi-glass tubular that aperture is 8mm, in matrix distribution on the sidewall paneling of described box-type shell;
What the front panel and squab panel of described box-type shell be respectively arranged with some layerings arrange is the thief hatch that 8mm plexi-glass tubular is made by aperture, described thief hatch is distributed on front panel corresponding to the separated each sample space of described porous water dispensing board or squab panel, each described thief hatch is provided with sampler or is sealed with sealing plug, the front panel of described box-type shell and the two ends of squab panel be respectively arranged with in longitudinal arrangement one to arrange by aperture be the overflow vent that 8mm plexi-glass tubular is made, at described overflow vent place, sampler is installed or is connected to the run-down pipe being with operation valve,
The base plate of described box-type shell has some draining mudholes, each draining mudhole is connected to a draining discharge pipeline, the pvc pipe of the effective diameter 40mm of described draining spoil disposal is made, stainless steel gauze is sealed with at the inner orifice place of described draining mudhole, described draining discharge pipeline is connected to draining spoil disposal operation valve, and the lower end of all described draining discharge pipelines is received on a draining spoil disposal house steward altogether;
Be provided with chassis in the bottom shelf of described box-type shell, described chassis is connected by some caster support; A collapsible rectangular hanger is respectively connected at the two ends on described chassis, adjustable for height water tank laid by described suspension bracket, a described water tank is connected on the described water inlet of described box-type shell by connecting pipeline, and water tank described in another is connected on the described water delivering orifice of described box-type shell by connecting pipeline; Described connecting pipeline is separately installed with solenoid valve and flowmeter, and the data line on described flowmeter is connected on described middle control computer;
In described box-type shell by the anaerobic condition be filled with in the separated each sample space of described porous water dispensing board for simulating typical hydrogeologic element, monitoring/medicine feeding hole pipe that some pvc pipes being 20mm by caliber are uprightly made is plugged with respectively in each sample space, the bottom of described monitoring/medicine feeding hole pipe contacts with the base plate of described box-type shell, the top of described monitoring/medicine feeding hole pipe and the suitable for reading mutually concordant of described box-type shell; On the tube wall of described monitoring/medicine feeding hole pipe, circumferentially symmetry has four row apertures is the eyelet of 2mm, and often the distance between the upper and lower of row eyelet is 10mm, is enclosed with stainless steel gauze in the outside of described monitoring/medicine feeding hole pipe; Described monitoring/medicine feeding hole pipe inserts wherein for the monitoring probe of on-Line Monitor Device, described monitoring probe is water quality monitoring probe and water level monitoring probe, the data line of described monitoring probe is connected on described middle control computer, to transmit and to process gathered experiment detection signal;
The suitable for reading of described box-type shell is provided with the gland bonnet that can start or fasten;
Described aerator comprises air supply header, gas-distribution pipe and aeration tube; Described aeration tube has double pore vertically on the pvc pipe that caliber is 10mm, and the aperture of each pore is 1mm, and the pitch-row of every vent port is 5mm, and the center of circle angle of two vent ports is 45 °; Described aeration tube be horizontally set in described box-type shell by the bottom in the separated each sample space of described porous water dispensing board, one end of described aeration tube is connected on the described gas-distribution pipe that is plugged in described box-type shell in each sample space, the upper end of described gas-distribution pipe is connected on the described air supply header that is arranged at above described box-type shell, gas-distribution pipe described in every root is equipped with aeration control valve, described air supply header, by fan blower or high-pressure nitrogen bottle air feed, forms aeration by regulating and controlling described aeration control valve;
The described simulation device that drenches with rain comprises water main, sparge pipe, coiled pipe and the pipe that drenches with rain, the described pipe that drenches with rain comprises a distributive pipe and the some showers be vertically connected on described distributive pipe, the pvc pipe of described shower to be caliber be 10mm, shower has double draining hole vertically, the aperture in each water hole is 1mm, the pitch-row of every osculum is 5mm, and the center of circle angle of two osculums is 45 °; The described pipe that drenches with rain is divided into some groups, shower is wherein horizontally set on the top of described box-type shell, the pipe that often drenches with rain described in group is connected to the lower end of described sparge pipe by described coiled pipe, the upper end of the described sparge pipe of each group is received on described water main altogether, and sparge pipe described in every root is equipped with the operation valve that drenches with rain; Described water main is supplied water by water pump or running water pipe, forms rainfall simulation by the operation valve that drenches with rain described in regulating and controlling;
The packing method of simulating the anaerobic condition of typical hydrogeologic element is, from aeration zone and the anaerobic condition layering collection pedotheque of the studied basin geologic section determined, again 50-200 object refinement drying process are carried out respectively to pedotheque, finally by the geologic structure relation of the pedotheque on the corresponding geographic position that processed according to studied basin, successively evenly insert in all samples space in described box-type shell, the laying depth of the pedotheque of the same anaerobic condition layer inserted in each sample space is substantially identical, and be positioned on the sustained height of described box-type shell, the apical side height of pedotheque is than the suitable for reading low 50mm of described box-type shell,
Described water-bearing zone redox environment analogue experiment method comprises following operation steps:
The requirement of a, experimentally code is determined to detect position, and insert dissolved oxygen DO monitoring probe in relevant monitoring/medicine feeding hole pipe in described box-type shell, insertion depth according to Experimental Procedures need determine, the data line of each dissolved oxygen DO monitoring probe is all connected on middle control computer; The experimentally position of the requirement determination sample collection of code, the thief hatch that described box-type shell is determined and overflow vent takes off sealing plug respectively and installs sampler;
B, the air supply header on fan blower and described groundwater dynamic simulation experiment platform to be tightly connected, and the requirement of experimentally code, open all or part of aeration control valve;
The aeration intensity of c, experimentally code setting and the parameter request of aeration time, start fan blower to be pressurizeed by the anaerobic condition air blast of the described aeration tube in described aerator to filling in described box-type shell, described aeration tube according to set pressure ejection gas, thus has formed oxygen condition or double oxygen condition in anaerobic condition in described box-type shell in described box-type shell;
D, monitored the dissolved oxygen conditions of anaerobic condition in described box-type shell in real time by dissolved oxygen monitor, according to the change of dissolved oxygen conditions, corresponding adjustment aeration intensity, aeration time parameter, thus aerobic condition required by guarantee Experimental Procedures or double oxygen condition, in groundwater dynamic simulation experiment platform, form the process simulation of aerobic experimental situation or double oxygen experimental situation thus.
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| CN202041444U (en) * | 2011-04-14 | 2011-11-16 | 中国地质大学（武汉） | Underground pollution simulation device for detecting three-dimensional hydrodynamic diffusion coefficient |
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