A kind of experimental rig of simulation pyrolysis pollutant diffusion And Movement in underground water in situTechnical field
A kind of experimental rig of simulation of present invention pyrolysis pollutant diffusion And Movement in underground water in situ, is mainly used for oily pageThe pyrolysis exploiting field groundwater pollution simulation research in situ such as rock and low-disintegration coal, spreads fortune for research Pyrolysis Contamination object in underground waterIt moves rule and test data is provided.
Background technique
In-situ heat solution exploitation be that pyrolyzation fluid is directly injected into buried target ore bed by heat injection well, using injection fluid withThe physics chemical action occurred between ore bed useful constituent is pyrolyzed target ore bed useful constituent in situ, will finally haveIt is converted into fluid with component, a kind of mining methods on ground are then extracted by producing well.With traditional mining method phaseThan not needing mineral products digging to earth's surface can obtain resource, having process flow few, at low cost, coefficient of mining is high, and land occupation is fewThe advantages of, it is the important way of the development and utilization such as the following oil shale and low-disintegration coal.
Although the exploitation of in-situ heat solution has above-mentioned advantage, pyrolysis meeting is so that the permeability of oil shale and low-disintegration coal occursGreat variety becomes pervious bed from water barrier, and the heavy metal generated in pyrolytic process, organic pollutant etc. can enter adjacent containIn water layer, underground water pollution is caused.Pyrolysis in situ descends water pollution research seldom over the ground at present, and is based primarily upon stagnant water and impregnates examinationIt tests, this has crustal stress and hydraulic condition grave fault with exploiting field in situ, and obtained experimental result differs larger with truth.ExploitationThe pollutant diffusion And Movement experimental rig of energy simulated ground stress and hydraulic pressure reflects exploiting field underground water pollution in situ with heavy to trueWant meaning.
Summary of the invention
Pyrolysis pollutant purpose of the experimental rig of diffusion And Movement in underground water is a kind of simulation of the present invention in situ, gramThe defect and deficiency for taking traditional soak test method, providing a kind of can effectively simulate original ground temperature, crustal stress and hydraulic conditionUnder exploiting field underground water pollutant diffusion And Movement experimental rig, can be Transport of the research Pyrolysis Contamination object in underground waterReliable test data is provided.
A kind of experimental rig of simulation pyrolysis pollutant diffusion And Movement in underground water in situ, it is characterised in that including hydraulic pressureSimulation system, ground temperature crustal stress simulation system, pollutant diffusion And Movement simulation system, the hydraulic analogue system is by gas, gasBody booster pump, pressure regulator valve, pressure gauge, intake valve, the first water tank, the second water tank, water compensating valve, inlet valve composition, gas pass through increasingPress pump is pressurized, and adjusts required pressure by pressure regulator valve and pressure gauge, passes through intake valve, the first water tank, inlet valve and pressurePower table is by water cycle factors into the second water tank；Water body supplements the water in the first water tank by water compensating valve.
The hydraulic analogue system is transmitted, not to test specimen load by the way that high pressure gas to be injected into water tank by pressureSame hydraulic pressure, to simulate the true groundwater environment of the preservations such as oil shale and low-disintegration coal layer.Gas is increased by booster pumpPressure, pressure needed for being adjusted by pressure regulator valve and pressure gauge, is passed hydraulic pressure by intake valve, the first water tank, inlet valve and pressure gaugeIt is handed in the second water tank.Water body supplements the water in the first water tank by water compensating valve.
The ground temperature crustal stress simulation system passes through the mild crustal stress condition of insulating box and servo-pressing machine simulation ground.InstituteGround temperature crustal stress simulation system is stated to be made of insulating box, servo-pressing machine, pressure sensor.By servo-pressing machine to being placed in heatPyrolysis formation sample progress axis pressure and the confining pressure load in the microscope carrier of rock stratum are solved, is tried by pressure sensor pyrolysis rock stratum is applied toThe axis pressure and confining pressure of part are precisely monitored, by servo-pressing machine to the permeable stratum sample being placed in adjacent pervious bed microscope carrierAxis pressure and confining pressure load are carried out, the axis for being applied to permeable stratum sample is pressed by pressure sensor and confining pressure is precisely supervisedControl carries out heated at constant temperature to pyrolysis rock stratum test specimen and permeable stratum sample by insulating box.
Pollutant diffusion And Movement simulation system, by by with hydraulic pressure water body note be implanted sequentially pyrolysis rock stratum test specimen and thoroughlyIn water formation sample, to simulate diffusion And Movement of the Pyrolysis Contamination object in underground water.Pollutant diffusion And Movement simulation system is by waterCase, pyrolysis rock stratum microscope carrier, infiltration liquid case, adjacent pervious bed microscope carrier, infiltration liquid case, tapping valve, liquid trap, water compensating valve, fastening spiral shellBolt composition, pyrolysis rock stratum test specimen are placed in pyrolysis rock stratum microscope carrier, and pyrolysis rock stratum microscope carrier is using flange arrangement and close with fastening boltEnvelope, permeable stratum test specimen is placed in adjacent pervious bed microscope carrier, and adjacent pervious bed microscope carrier is using flange arrangement and close with fastening boltEnvelope, under the action of water pressure, water body enter pyrolysis rock stratum microscope carrier from water tank and form contaminated liquid, and contaminated liquid enters infiltration liquid case, passes throughTapping valve acquires penetrating fluid at different height position into liquid trap, under hydraulic pressure effect, is permeated the contaminated liquid of liquid case through phaseAdjacent pervious bed microscope carrier enters in infiltration liquid case, is acquired penetrating fluid at different height position into liquid trap by tapping valve,Penetrating fluid is collected into liquid trap by tapping valve.Drain threshold velocity is identical as groundwater velocity, and main function is simulation groundThe flowing running water characteristic being lauched, the main function of water compensating valve be to supplement the water body isometric through the taken contaminated liquid of tapping valve, withReduce liquid volume in infiltration liquid case and changes bring error.
The present invention can press under the conditions of ground temperature test specimen loading axis and confining pressure, while simulated groundwater hydraulic condition, examinationPart is having a size of 400 × 50mm of Φ, test specimen axis pressure and confining pressure 0-20MPa, hydraulic pressure 0-10MPa, 0-80 DEG C of test specimen environment temperature, simulationBuried depth reaches the geological environment of 800m.
A kind of above-mentioned simulation is pyrolyzed the experimental rig of pollutant diffusion And Movement in underground water in situ, which is characterized in thatThe pyrolysis rock stratum microscope carrier and adjacent pervious bed microscope carrier can load pyrolysis rock stratum test specimen and permeable stratum test specimen, sample dimensions respectivelyIt is 400 × 50mm of Φ.
A kind of above-mentioned simulation is pyrolyzed the experimental rig of pollutant diffusion And Movement in underground water in situ, which is characterized in thatThe axis pressure loaded to test specimen and confining pressure are 0-20MPa, and hydraulic pressure 0-10MPa, temperature is 0-80 DEG C.
A kind of above-mentioned simulation is pyrolyzed the experimental rig of pollutant diffusion And Movement in underground water in situ, which is characterized in thatGas 1 in the hydraulic analogue system is using nitrogen.
A kind of above-mentioned simulation is pyrolyzed the test method of pollutant experimental rig of diffusion And Movement in underground water in situ,Device used by being characterized in that can constant-temperature high-pressure encapsulation test specimen, analog mineral products buried depth reaches the ground temperature crustal stress of 800mPyrolysis rock stratum test specimen and permeable stratum test specimen are respectively placed in pyrolysis rock stratum microscope carrier and phase first by the device of hydraulic condition, this methodIn adjacent pervious bed microscope carrier, and it is sealed with fastening bolt；Water compensating valve, inlet valve are opened, water tank, infiltration liquid case is made to be full of water,Close water compensating valve；Servo-pressing machine is opened after temperature reaches setting value and stablizes 30min to incubator set point target temperatureAxis pressure and confining pressure are applied to test specimen, pressure is controlled to setting value by pressure sensor；Hydraulic analogue system is opened to apply test specimenAdd hydraulic pressure, so that hydraulic pressure is increased to setup pressure value by gas booster pump, pressure regulator valve, pressure gauge, intake valve；Tapping valve is opened, is madeDrain threshold velocity is identical as groundwater velocity, and penetrating fluid is collected into liquid trap, on-test；Sampling time point is being set,Tapping valve is opened to collect contaminated liquid, when taking liquid, the old liquid that should first be vented in tapping valve and rinse, it is later, fast from each tapping valveSpeed continuously takes sample three times, using the average value of three parallel contaminated liquid sample concentrations as the position contaminated liquid concentration value.EachAfter picking up contaminated liquid, changes bring error to reduce liquor capacity, imported and the bodies such as the amount of picking up by water compensating valve at onceLong-pending water.Different location contaminated liquid ingredient and concentration is determined by analysis, the diffusion And Movement to Pyrolysis Contamination object in underground water is advisedRule is studied.
Pyrolysis pollutant experimental rig advantage of diffusion And Movement in underground water is a kind of simulation of the present invention in situ: with showThere are device and method to compare, which has fully considered the ground temperature, crustal stress, ground water pressure condition of mineral products preservation, can be to examinationPart loads the axis pressure and confining pressure of 0-20MPa respectively, applies the hydraulic pressure of 0-10MPa, 0-80 DEG C of test specimen environment temperature, analog 800mGeological conditions.The present invention is not only oil shale and low-disintegration coal, and pyrolysis pollutant diffusion And Movement in underground water tries in situThe significant innovation of proved recipe method and experimental rig, more other buried mineral products in-situ heat solution exploitation bring groundwater environment effects mentionFeasible experimental study method is supplied.
Detailed description of the invention
Fig. 1 is the simulation test device structural schematic diagram of pyrolysis pollutant diffusion And Movement in underground water in situ.
Label in figure: 1 --- gas；2 --- gas booster pump；3 --- pressure regulator valve；4-1 --- first pressure gauge；4-2 --- first pressure gauge；5 --- intake valve；6-1 --- the first water tank；6-2 --- the second water tank；7-1 --- the first moisturizingValve；7-2 --- the second water compensating valve；7-3 --- third water compensating valve: 8 --- inlet valve；9 --- insulating box；10-1 --- first watchesTake press machine；10-2 --- the second servo-pressing machine；11-1 --- first pressure sensor；11-2 --- second pressure sensingDevice；12 --- pyrolysis rock stratum microscope carrier；13-1 --- the first infiltration liquid case；13-2 --- the second infiltration liquid case；14 --- it is adjacentWater layer microscope carrier；15 --- tapping valve；16 --- liquid trap；17 --- fastening bolt.
Specific embodiment
This experimental rig can be with the diffusion And Movement of oil shale in-situ Pyrolysis Contamination object in simulated groundwater, also analog undergroundLignite is pyrolyzed the diffusion And Movement of pollutant in situ in water.
Shown in Fig. 1, a kind of experimental rig of simulation pyrolysis pollutant diffusion And Movement in underground water in situ, it is characterised in thatIncluding hydraulic analogue system, ground temperature crustal stress simulation system, pollutant diffusion And Movement simulation system, the hydraulic analogue system byGas 1, gas booster pump 2, pressure regulator valve 3, first pressure gauge 4-1, intake valve 5, the first water tank 6-1, the first water compensating valve 7-1, intoWater valve 8 forms；
Gas is pressurized by booster pump, and pressure needed for being adjusted by pressure regulator valve and pressure gauge, passes through intake valve, theOne water tank, inlet valve and pressure gauge are by water cycle factors into the second water tank 6-2；Water body carries out the water in water tank by water compensating valveSupplement.
The ground temperature crustal stress simulation system, is made of insulating box 9, pressure sensor, servo-pressing machine.It is watched by firstIt takes press machine 10-1 and axis pressure and confining pressure load is carried out to the pyrolysis formation sample being placed in pyrolysis rock stratum microscope carrier 12, pass through the first pressureForce snesor 11-1 precisely monitors the axis pressure and confining pressure that are applied to pyrolysis rock stratum test specimen, passes through the second servo-pressing machine10-2 carries out axis pressure to the permeable stratum sample being placed in adjacent pervious bed microscope carrier 14 and confining pressure loads, and is sensed by second pressureDevice 11-2 to be applied to permeable stratum sample axis press and confining pressure precisely monitored, by insulating box to pyrolysis rock stratum test specimen withPermeable stratum sample carries out heated at constant temperature.
Embodiment 1: the diffusion And Movement of oil shale in-situ Pyrolysis Contamination object in simulated groundwater
The experimental rig of present embodiment is pyrolyzed the examination of pollutant diffusion And Movement in underground water using above-mentioned simulation in situExperiment device.
It is as follows that operating procedure is embodied:
1, by having a size of 400 × 50mm of Φ pyrolysis oil shale test specimen and permeable stratum test specimen be respectively put into pyrolysis rock stratum carryIt in platform 12 and adjacent pervious bed microscope carrier 14, is sealed with 17 pairs of pyrolysis rock stratum microscope carriers 12 of fastening bolt, adjacent permeable stratum carriesPlatform 14 is sealed.
2, first open water compensating valve 7-1, second open water compensating valve 7-2, third opens water compensating valve 7-3, inlet valve 8, make theOne water tank 6-1, the second water tank 6-2, the first infiltration liquid case 13-1, the second infiltration liquid case 13-2 are full of water, close the first water compensating valve7-1, the second water compensating valve 7-2, third water compensating valve 7-3.
3, according to required simulation oil shale layer buried depth and hydrogeologic condition, temperature ring where oil shale is calculatedBorder, ground stress environment and ground water pressure force environment set target temperature to insulating box 9, when temperature reaches setting value and stabilizationIt after 30min, opens servo-pressing machine and axis pressure and confining pressure is applied to test specimen, pressure is controlled to setting value by pressure sensor；It opensIt opens hydraulic analogue system and hydraulic pressure is applied to test specimen, made by gas booster pump 2, pressure regulator valve 3, first pressure gauge 4-1, intake valve 5Hydraulic pressure increases to setup pressure value.
4, according to practical hydrogeologic condition, groundwater velocity is selected, opens tapping valve 15, makes 15 flow velocity of tapping valve and groundLower water flow velocity is identical, on-test.
5, sample time and sampling amount are set according to actual tests demand, when sampling, tapping valve 15 is opened and collects contaminated liquidInto liquid trap 16.
6, after picking up contaminated liquid every time, change bring error to reduce liquor capacity, pass through water compensating valve at onceIt imports and water that the amount of picking up is isometric.
7, different location contaminated liquid ingredient and concentration is determined by analysis, studies oil shale pyrolysis pollutant in underground waterDiffusive migration rule.
Embodiment 2: lignite is pyrolyzed the diffusion And Movement of pollutant in situ in simulated groundwater
The experimental rig of present embodiment is pyrolyzed the examination of pollutant diffusion And Movement in underground water using above-mentioned simulation in situExperiment device, it can satisfy the diffusion And Movement that lignite in simulated groundwater is pyrolyzed pollutant in situ, by that will be pyrolyzed lignite test specimenIt is placed in microscope carrier, seals with permeable stratum test specimen, make equipment full of water, reach setting value to calorstat temperature and stablize 30minAfterwards, axis pressure, confining pressure and hydraulic pressure are applied to test specimen, opens bottom tapping valve 15, keeps its flow velocity identical as groundwater velocity.Hereafter,Tapping valve picks up contaminated liquid at different location on the right side of time opening, analyzes contaminated liquid ingredient and concentration, studies lignite Pyrolysis ContaminationDiffusive migration rule of the object in underground water.
In conclusion present invention is mainly used for oil shale in underground water and low-disintegration coal etc., the diffusion of pyrolysis pollutant is transported in situMove research.
The experimental rig can simulate the underground water under the conditions of different crustal stress conditions, temperature condition, groundwater pressureMiddle Pyrolysis Contamination object diffusion And Movement problem, but embodiment of above is only used to illustrate the technical scheme of the present invention and not to limit it,Although by referring to embodiments of the present invention, invention has been described, and the scientific research technical staff of this field shouldUnderstand, various changes can be made to it in the form and details.