CN210995782U - Contaminated site soil-groundwater integral type simulation prosthetic devices - Google Patents
Contaminated site soil-groundwater integral type simulation prosthetic devices Download PDFInfo
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- CN210995782U CN210995782U CN201921835424.4U CN201921835424U CN210995782U CN 210995782 U CN210995782 U CN 210995782U CN 201921835424 U CN201921835424 U CN 201921835424U CN 210995782 U CN210995782 U CN 210995782U
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Abstract
The utility model provides a contaminated site soil-groundwater integral type simulation prosthetic devices and method, wherein the device includes four parts of earth pillar analogue means, groundwater analogue means, rainfall analogue means, monitoring devices. The soil column simulation device mainly comprises a cylinder, permeable geotextile and a soil sampling port. The underground water simulator mainly comprises a box body, an underground water injection port, an underground water outlet, an underground water sampling port, a peristaltic pump, a water inlet pipe, a water outlet pipe and a liquid storage tank. The monitoring device comprises an integrated monitoring probe. The utility model discloses the device utilizes rainfall and seepage flow analogue means to realize the joint simulation to soil aeration zone rainfall osmosis and rivers osmosis, adopts integrated form monitor probe to realize the real-time supervision of soil horizon and groundwater layer temperature, pH, dissolved oxygen and groundwater velocity isoparametric, can accurate simulation aeration zone complex structure, realizes soil/groundwater integration restoration simulation and repair process monitoring and aassessment.
Description
Technical Field
The utility model belongs to the technical field of pollute place restoration research, concretely relates to pollute place soil-groundwater integral type simulation prosthetic devices.
Background
The polluted site is a site which is polluted by the actions of producing, managing, treating and storing toxic and harmful substances, stacking or treating dangerous wastes, mining and the like and is harmful to the health of a human body or the ecological environment. With the economic development, the upgrading of industrial structures and the acceleration of urbanization process in China, the soil left in the site of some heavily polluted enterprises is also polluted, and the hidden environmental hazards are increasingly prominent. Due to precipitation or infiltration of surface water, contaminants inevitably enter the groundwater through the soil, causing groundwater contamination.
The soil can be divided into an aeration zone (unsaturated zone) and a saturated zone (saturated zone), and the water in the saturated zone is collectively called groundwater. The shallow groundwater mainly circulates vertically, the replenishment mainly comprises atmospheric precipitation, surface water and field irrigation, and the replenishment characteristic change of the groundwater is directly influenced by the amount of atmospheric precipitation, the precipitation strength and the precipitation duration. The drainage is mainly evaporation transpiration, artificial mining and underground water mining. The soil aeration zone is a main channel for groundwater supply and drainage and is an important ring for the migration and transformation of pollutants in a soil-groundwater system.
The commonly used site pollution remediation technologies can be roughly divided into three types, namely physical, chemical, biological and the like. The microbial remediation technology is an emerging technology which is clean, efficient, convenient to apply and great in development potential. At present, both in-situ microbial remediation technology and heterotopic microbial remediation technologies such as prefabricated beds, composting treatment and bioreactors only serve a single medium (soil or underground water), and integrated remediation of the soil/underground water is not realized. In addition, at present, indoor soil columns or seepage grooves are mainly adopted for experimental research on migration and transformation of pollutants in a soil-underground water system, the combined action of rainwater leaching and seepage in a soil aeration zone is not simulated by the methods, and the monitoring and evaluation of parameters such as temperature, pH and dissolved oxygen in the soil-underground water system, particularly the soil aeration zone, are lacked, so that the requirements of site pollution remediation process monitoring and post-evaluation are not met.
Based on above problem, the utility model provides a pollute place soil-groundwater integral type simulation prosthetic devices can accurate simulation aeration zone complex structure, realizes soil/groundwater integration restoration simulation and repair process monitoring and aassessment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome that current device simulation mode is too simple, unsatisfied pollution repair process detects and the back aassessment requires not enough, provides a pollute place soil-groundwater integral type analog system and repair method, and accurate simulation package gas zone complex structure realizes the simulation of multi-media integration restoration, supports the repair process and detects and aassessment.
The utility model discloses the technical scheme who specifically adopts as follows:
a polluted site soil-underground water integrated simulation restoration device comprises a soil column simulation device, an underground water simulation device, an artificial rainfall device and a monitoring device; the soil column simulation device is attached to and arranged above the underground water simulation device; the soil column simulation device comprises a cylinder body, a seepage injection port and a soil sampling port, wherein a plurality of seepage injection ports and a plurality of soil sampling ports are respectively arranged at different heights on the side wall of the cylinder body, a gravel layer is filled at the bottom in the cylinder body, a permeable geotextile is laid above the gravel layer, the soil to be simulated is filled above the permeable geotextile, and the seepage injection port is externally connected with a simulated seepage liquid storage tank through a pipeline; the underground water simulation device comprises a box body, an underground water injection port, an underground water outlet and an underground water sampling port, wherein the top of the box body is communicated with the bottom of the cylinder body through a through hole, so that water flow between the box body and the cylinder body can vertically migrate through a gravel layer; one side of the side wall of the box body is provided with an underground water injection port, and the other side of the side wall of the box body is respectively provided with an underground water outlet and an underground water sampling port; the underground water inlet is externally connected with a first liquid storage tank through a water inlet pipe, the underground water outlet is externally connected with a second liquid storage tank through a water outlet pipe, and peristaltic pumps are arranged on the water inlet pipe and the water outlet pipe; the artificial rainfall device is positioned above soil to be simulated filled in the soil column simulation device, and an inlet of the artificial rainfall device is externally connected with a rainfall simulation liquid storage tank through a pipeline; the monitoring device comprises a plurality of integrated monitoring probes, and the integrated monitoring probes are respectively arranged at different heights of soil to be simulated in the cylinder body and inside the box body and are used for monitoring the temperature, pH, dissolved oxygen and groundwater flow velocity of each set position.
Preferably, each pipeline is provided with a valve for controlling the opening and closing of the pipeline.
Preferably, the height-diameter ratio of the cylinder is 1: 1-4: 1.
Preferably, the diameter of the through hole between the top of the box body and the bottom of the cylinder body is 1 mm-10 mm.
Preferably, the gravel particle size in the gravel layer is larger than the bottom perforation diameter.
Preferably, the integrated monitoring probes are uniformly arranged in the soil in the cylinder from top to bottom, and at least 1 monitoring probe is arranged inside the box body.
Preferably, the seepage injection ports and the soil sampling ports are arranged in plurality and are respectively and uniformly arranged along the side wall of the cylinder body in the vertical direction; the groundwater sampling mouth also sets up a plurality ofly, and evenly sets up along the box lateral wall is vertical.
Preferably, the box body is made of transparent organic glass, and a stainless steel support frame is arranged on the periphery of the box body.
Preferably, the integrated monitoring probe comprises a temperature monitoring probe, a pH monitoring probe and a dissolved oxygen monitoring probe, and a water flow velocity monitoring probe is further integrated in the integrated monitoring probe positioned in the box body.
Another object of the present invention is to provide a method for simulating and repairing contaminated site soil-groundwater integrated simulation repairing apparatus, which comprises the following steps:
1) collecting soil samples from a researched area in a layered mode, and respectively carrying out uniform thinning and drying treatment;
2) filling a gravel layer at the bottom of the cylinder body to simulate a full water layer, and paving a permeable geotextile at the top of the gravel layer; sequentially filling the soil samples treated in the step 1) above the permeable geotextile according to the layering sequence of the original soil, wherein the height of the filled soil is higher than that of the uppermost seepage injection port formed in the side wall of the cylinder body, and the filled soil is used for simulating a water-bearing layer;
3) acquiring an actual underground water sample from an in-situ drilling hole of a researched area, injecting the actual underground water sample into a first liquid storage tank, injecting a simulated rainfall solution into a simulated rainfall liquid storage tank, and injecting a simulated seepage solution into the simulated seepage liquid storage tank;
4) according to the rainfall intensity to be simulated, uniformly leaching the simulated rainfall solution in the simulated rainfall liquid storage tank into the soil filled in the barrel by controlling the artificial rainfall device; injecting simulated seepage liquid in the simulated seepage liquid storage tank into the soil layer through a seepage injection port at positive pressure, and injecting actual underground water into the box body through an underground water injection port by controlling a peristaltic pump;
5) along with the water injection, the water flow in the box body gradually flows out of the underground water simulation device and enters the second liquid storage tank to form underground water simulation; stabilizing the water level of underground water flowing through the interior of the box body at a set value by controlling the peristaltic pump, and simulating the migration and transformation of pollutants in a field soil-underground water system;
6) in the simulation process, the integrated monitoring probe is used for monitoring the temperature, pH, dissolved oxygen and groundwater flow velocity of soil and groundwater at different depths in real time; simultaneously, soil and underground water samples are respectively collected through a soil sampling port and an underground water sampling port.
The utility model discloses beneficial effect who has: 1) the soil-underground water medium is served, and integrated restoration simulation is realized; 2) the rainfall and seepage simulation device is utilized to realize the combined simulation of rainfall infiltration and water infiltration of the soil aeration zone, and the migration and transformation of pollutants in a field soil-underground water system can be effectively simulated; 3) the integrated monitoring probe is utilized to realize real-time monitoring of parameters such as temperature, pH, dissolved oxygen and flow velocity of underground water of the soil layer and the underground water layer, can accurately monitor the environmental conditions of a polluted site soil-underground water system, and supports site pollution remediation process monitoring and post-evaluation.
Drawings
FIG. 1 is a schematic view of the soil-groundwater integrated simulation restoration device for a contaminated site of the present invention;
in the figure: the device comprises a cylinder body 1, an artificial rainfall device 2, a seepage filling port 3, a soil sampling port 4, a permeable geotextile 5, a box body 6, a peristaltic pump 7, an integrated monitoring probe 8, an underground water filling port 9, an underground water outflow port 10, an underground water sampling port 11, a first liquid storage tank 12, a second liquid storage tank 13, a simulated rainwater storage tank 14, a simulated seepage liquid storage tank 15 and a data acquisition device 16.
Detailed Description
For a further understanding of the present invention, reference should be made to the following further description and specific examples, taken in conjunction with the accompanying drawings, and it is to be understood that the description is intended to further illustrate the features and advantages of the present invention, and not to limit the scope of the invention.
As shown in figure 1, the soil-underground water integrated simulation restoration device for the polluted site comprises a soil column simulation device, an underground water simulation device, an artificial rainfall device 2 and a monitoring device, wherein the soil column simulation device is attached to and arranged above the underground water simulation device, and the lower end of the soil column simulation device is fixedly connected with the upper end of the underground water simulation device. The top of the underground water simulation device can completely support the bottom of the soil column simulation device, so that water flowing down from the soil column simulation device can completely enter the underground water simulation device.
The earth pillar simulation device comprises a cylinder body 1, a seepage filling opening 3 and a soil sampling opening 4. Barrel 1 is whole earth pillar analogue means's main part, and seepage flow filling opening 3 and soil sampling mouth 4 all locate on 1 lateral wall of barrel, and seepage flow filling opening 3 and soil sampling mouth 4 all can vertically evenly set up a plurality ofly along 1 lateral wall of barrel respectively as required to simulate actual seepage flow and gather the soil of the different degree of depth. The bottom in the barrel 1 is filled with a gravel layer, a layer of permeable geotextile 5 is laid above the gravel layer, and soil to be simulated is filled above the permeable geotextile 5. After the soil is filled, the soil layer can simulate a water-bearing layer, the gravel layer can simulate a water-saturated layer, and the water-permeable geotextile 5 between the soil layer and the gravel layer can ensure that water flows vertically but can prevent the soil from falling. A plurality of through holes are arranged between the bottom of the cylinder body 1 and the top of the underground water simulation device, the diameter of each through hole is 1-10 mm, so that seepage liquid can flow downwards into the underground water simulation device, and the particle size of gravel is larger than the diameter of the through holes so as not to fall from the holes. The seepage injection port 3 is externally connected with a simulated seepage liquid storage tank 15 through a pipeline, and a control valve can be arranged on the pipeline.
The groundwater simulation apparatus includes a tank 6, a groundwater inlet 9, a groundwater outflow port 10, and a groundwater sampling port 11. Wherein the box 6 is the main part of whole groundwater analogue means, and box 6 is transparent organic glass material, and the periphery is equipped with the stainless steel support frame. The top of the box body 6 is communicated with the bottom of the cylinder body 1 through the through holes, so that water flow between the box body and the cylinder body can vertically migrate through the gravel layer, and the combined simulation of rainfall osmosis and water flow osmosis of the soil aeration zone is realized. 6 lateral wall one side of box is equipped with groundwater filling opening 9, and the opposite side is equipped with groundwater egress opening 10 and groundwater sample connection 11 respectively, and wherein groundwater sample connection 11 can be as required along 6 lateral walls of box vertical evenly set up a plurality ofly to gather the groundwater sample of the different degree of depth. The underground water inlet 9 is connected with a first liquid storage tank 12 through a water inlet pipe, the underground water outlet 10 is connected with a second liquid storage tank 13 through a water outlet pipe, peristaltic pumps 7 are arranged on the water inlet pipe and the water outlet pipe, and meanwhile, a control valve can be arranged on a pipeline. The water in the first tank 12 can be driven by the peristaltic pump 7 into the tank 6 and then discharged into the second tank 13 to simulate the flow of groundwater. The inlet tube and the outlet tube are preferably silicone tubes, and are respectively clamped in different peristaltic pumps 7, so that the flow velocity of water flow can be conveniently and respectively controlled, and the liquid level in the underground water simulation device can be adjusted.
The artificial rainfall device 2 is positioned above soil to be simulated filled in the soil column simulation device, an inlet of the artificial rainfall device is externally connected with a rainfall simulation liquid storage tank 14 through a pipeline, and a control valve can be arranged on the pipeline to control rainfall on-off or intensity. The monitoring device comprises a plurality of integrated monitoring probes 8 which are respectively arranged at different heights of the soil to be simulated in the cylinder body 1 and inside the box body 6 and are used for monitoring the temperature, pH, dissolved oxygen and groundwater flow velocity of each setting position. The integrated monitoring probe 8 can integrate a temperature monitoring probe, a pH monitoring probe, a dissolved oxygen monitoring probe and a water flow velocity monitoring probe according to monitoring requirements, and is used for monitoring the conditions of temperature, pH, dissolved oxygen and water flow velocity. A plurality of integrated monitoring probes 8 are uniformly arranged in the soil in the barrel body 1 from top to bottom, at least 1 monitoring probe is arranged in the box body 6, and the specific arrangement number is determined according to the size of the whole device and the monitoring requirement. In this embodiment, arrange 3 integrated form monitor probe 8 in the soil in barrel 1, all integrate in these 3 integrated form monitor probe 8 and have temperature monitoring probe, pH monitor probe and dissolved oxygen monitor probe for temperature, pH, the dissolved oxygen of the different degree of depth in the real-time supervision soil aquifer. And 1 integrated form monitor probe 8 has been arranged to box 6 inside, and except integrated temperature monitor probe, pH monitor probe, dissolved oxygen monitor probe among the integrated form monitor probe 8 of box 6 inside, it has rivers velocity of flow monitor probe still to integrate for temperature, pH, dissolved oxygen and the rivers velocity of flow in the real-time supervision groundwater. The probes can accurately monitor the environmental conditions of a polluted site soil-underground water system so as to support site pollution remediation process monitoring and post-evaluation. Of course, the specific integrated probe type of each integrated monitoring probe 8 can also be adjusted according to the detection requirements. Each integrated monitoring probe 8 may be connected by wires to a data acquisition device 16 external to the apparatus. The data acquisition device 16 may be a central control computer to facilitate visual display, storage and analysis of the data.
In addition, for convenient control, the utility model discloses a all be equipped with the valve of control duct switching on each pipeline in the device. The barrel 1 in the utility model can be cylindrical, the height-diameter ratio can be adjusted according to the needs, the range can be 1: 1-4: 1, and other shapes can be certainly realized.
A method for simulating and repairing by using the polluted site soil-underground water integrated simulating and repairing device comprises the following steps:
1) collecting soil samples from soil in a to-be-researched area in a layered mode, and carrying out pretreatment such as uniform refining and drying on the samples;
2) filling gravel at the bottom of the cylinder body 1 so as to simulate a water saturation layer of actual soil; laying a permeable geotextile 5 on the top of the gravel layer, sequentially filling the layered soil sample pretreated in the step 1) above the permeable geotextile 5, sequentially filling the sample in the layered sequence of the original soil during filling, keeping the thickness of the soil filled in each layer the same as that of the actual soil in the layer, and adjusting the filling mode of the soil according to the test requirement. In addition, in order to ensure the stability of seepage, the total height of the filled soil is higher than the uppermost seepage injection port 3 formed on the side wall of the cylinder 1 so as to enable water flow to seep into the soil, and the filled soil is used for simulating an actual soil aquifer;
3) acquiring an actual underground water sample from an in-situ drilling hole of a researched area, injecting the actual underground water sample into a first liquid storage tank 12, injecting a pre-prepared rainfall simulation solution into a rainfall simulation liquid storage tank 14, and injecting a pre-prepared seepage simulation solution into a seepage simulation liquid storage tank 15;
4) the rainfall amount per unit time is converted into the required rainfall intensity according to the test requirements, the rainfall simulation solution in the rainfall simulation liquid storage tank 14 is uniformly leached to the upper surface of the soil according to the rainfall intensity by controlling the artificial rainfall device 2, and then the rainfall simulation solution vertically permeates into the soil layer. Then, a valve on a communication pipeline corresponding to the seepage injection port 3 on the cylinder 1 is opened, the simulated seepage liquid in the simulated seepage liquid storage tank 15 is injected into the soil layer through the seepage injection port (3), and the simulated seepage liquid is kept at a certain positive pressure during injection so as to form seepage smoothly. In addition, a valve on a communication pipeline corresponding to the underground water injection port 9 on the box body 6 is opened, and actual underground water collected in situ in advance is pumped into the box body 6 by controlling the peristaltic pump 7;
5) along with the water injection, a valve on a pipeline communicated with the underground water outlet (10) of the box body (6) is opened, so that water flows out of the underground water simulation device gradually and enters the second liquid storage tank (13), and the flow simulation of the underground water is formed. Meanwhile, the flow rate of the peristaltic pumps (7) on the water inlet pipe and the water outlet pipe is controlled, so that the water level of underground water flowing through the interior of the box body (6) can be stabilized at a set value of a test, and migration and conversion of pollutants in a field soil-underground water system under different conditions can be simulated;
6) in the simulation process, the temperature, pH, dissolved oxygen and groundwater flow speed of soil and groundwater at different depths are monitored in real time by using an integrated monitoring probe (8); simultaneously, soil and underground water samples are respectively collected through the soil sampling port (4) and the underground water sampling port (11).
Therefore, the soil-underground water integrated simulation restoration device for the polluted site can accurately simulate the complicated structure of the aeration zone, and simultaneously, the samples collected from the sampling ports are analyzed by combining the parameters collected by different probes, so that the soil/underground water integrated restoration simulation and restoration process monitoring and evaluation can be realized.
The above is only the utility model discloses a preferred scheme of implementation to not be used for restricting the utility model discloses. For those skilled in the art, any modification, equivalent replacement, etc. within the spirit and scope of the present invention are included in the protection scope of the present invention.
Claims (9)
1. A polluted site soil-underground water integrated simulation restoration device is characterized by comprising a soil column simulation device, an underground water simulation device, an artificial rainfall device (2) and a monitoring device; the soil column simulation device is attached to and arranged above the underground water simulation device; the soil column simulation device comprises a cylinder body (1), a seepage injection port (3) and a soil sampling port (4), wherein a plurality of seepage injection ports (3) and a plurality of soil sampling ports (4) are respectively arranged at different heights on the side wall of the cylinder body (1), a gravel layer is filled at the bottom in the cylinder body (1), a permeable geotextile (5) is laid above the gravel layer, soil to be simulated is filled above the permeable geotextile (5), and the seepage injection port (3) is externally connected with a simulation seepage liquid storage tank (15) through a pipeline; the underground water simulation device comprises a box body (6), an underground water injection port (9), an underground water outflow port (10) and an underground water sampling port (11), wherein the top of the box body (6) is communicated with the bottom of the cylinder body (1) through a perforation, so that water flow between the box body and the cylinder body can vertically migrate through a gravel layer; one side of the side wall of the box body (6) is provided with an underground water inlet (9), and the other side is respectively provided with an underground water outlet (10) and an underground water sampling port (11); the underground water injection port (9) is externally connected with a first liquid storage tank (12) through a water inlet pipe, the underground water outlet (10) is externally connected with a second liquid storage tank (13) through a water outlet pipe, and peristaltic pumps (7) are arranged on the water inlet pipe and the water outlet pipe; the artificial rainfall device (2) is positioned above soil to be simulated filled in the soil column simulation device, and an inlet of the artificial rainfall device is externally connected with a simulated rainfall liquid storage tank (14) through a pipeline; the monitoring device comprises a plurality of integrated monitoring probes (8) which are respectively arranged at different heights of soil to be simulated in the cylinder body (1) and inside the box body (6) and are used for monitoring the temperature, pH, dissolved oxygen and groundwater flow speed of each setting position.
2. The soil-underground water integrated simulation restoration device for the polluted site as claimed in claim 1, wherein each pipeline is provided with a valve for controlling the opening and closing of the pipeline.
3. The polluted site soil-underground water integrated simulation restoration device according to claim 1, wherein the height-diameter ratio of the cylinder (1) is 1: 1-4: 1.
4. The soil-underground water integrated simulation restoration device for the polluted site as claimed in claim 1, wherein the diameter of the perforation between the top of the box body (6) and the bottom of the cylinder body (1) is 1 mm-10 mm.
5. The integrated simulated restoration device for soil-groundwater of a contaminated site as claimed in claim 1, wherein the diameter of the gravel in the gravel layer is larger than the diameter of the bottom perforation.
6. A polluted site soil-groundwater integrated simulation restoration device according to claim 1, wherein a plurality of the integrated monitoring probes (8) are uniformly arranged in the soil in the cylinder body (1) from top to bottom, and at least 1 monitoring probe is arranged inside the box body (6).
7. The soil-underground water integrated simulation restoration device for the polluted site according to claim 1, wherein a plurality of seepage injection ports (3) and soil sampling ports (4) are arranged and vertically and uniformly arranged along the side wall of the cylinder (1); the underground water sampling ports (11) are also arranged in a plurality of numbers and are vertically and uniformly arranged along the side wall of the box body (6).
8. The polluted site soil-underground water integrated simulation restoration device according to claim 1, wherein the box body (6) is made of transparent organic glass, and a stainless steel support frame is arranged on the periphery of the box body.
9. The soil-underground water integrated simulation restoration device for the polluted site as claimed in claim 1, wherein the integrated monitoring probe (8) comprises a temperature monitoring probe, a pH monitoring probe and a dissolved oxygen monitoring probe, and a water flow rate monitoring probe is further integrated in the integrated monitoring probe (8) positioned inside the box body (6).
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| CN201921835424.4U CN210995782U (en) | 2019-10-29 | 2019-10-29 | Contaminated site soil-groundwater integral type simulation prosthetic devices |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110681685A (en) * | 2019-10-29 | 2020-01-14 | 浙江大学 | Polluted site soil-underground water integrated simulation restoration device and method |
| CN113916724A (en) * | 2021-08-30 | 2022-01-11 | 中国农业科学院烟草研究所(中国烟草总公司青州烟草研究所) | Device and method for simulating diffusion of pathogenic bacteria in soil |
| CN114994245A (en) * | 2022-05-19 | 2022-09-02 | 浙江大学 | Microuniverse test device and method for simulating migration and transformation of pollutants in multi-media |
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2019
- 2019-10-29 CN CN201921835424.4U patent/CN210995782U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110681685A (en) * | 2019-10-29 | 2020-01-14 | 浙江大学 | Polluted site soil-underground water integrated simulation restoration device and method |
| CN113916724A (en) * | 2021-08-30 | 2022-01-11 | 中国农业科学院烟草研究所(中国烟草总公司青州烟草研究所) | Device and method for simulating diffusion of pathogenic bacteria in soil |
| CN114994245A (en) * | 2022-05-19 | 2022-09-02 | 浙江大学 | Microuniverse test device and method for simulating migration and transformation of pollutants in multi-media |
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