Multi-scale underground water aquifer medium pollutant migration path simulation experiment box

Abstract

The utility model discloses a multi-scale underground water aquifer medium pollutant migration path simulation experiment box, belongs to the technical field of pollutant migration simulation experiments, and solves the problem that an existing experiment box is small in underground water sampling range. The device comprises a transparent box body, the interior of the transparent box body is sequentially divided into a water injection cavity, a soil cavity and a water outlet cavity from left to right through two water permeable plates, a pollution box is placed in the soil cavity, a plurality of underground well pipes are arranged in the soil cavity, a plurality of sampling openings are formed in the outer wall of one side of the soil cavity, and a plug is detachably arranged in each sampling opening. Water can be sampled through a plurality of underground well casings, the migration condition of pollutants in water along with water flow and the concentration change trend of the pollutants can be known, meanwhile, sampling can be carried out through the sampling ports by detaching the plugs, the sampling positions are increased by arranging the sampling ports, the sampling range is expanded, and the sampling efficiency is improved. And the migration rate and migration direction of the pollutants can be analyzed more comprehensively.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pollutant migration simulation experiment, specifically relates to a kind of multi-scale groundwater aquifer medium pollutant migration path simulation experiment box. BACKGROUND

[0002] Soil and groundwater system is a complex environment, and the migration of pollutants is significantly affected by the actual hydrogeological conditions. In studying these complex migration rules, comparative simulation experiments in the laboratory become an important tool.

[0003] As a simulation experiment tool, the simulation experiment box can provide a more three-dimensional model of pollutant movement in one, two and three dimensions. Compared with vertical soil column experiments, the simulation experiment box can better simulate the migration of pollutants in multi-dimensional space.

[0004] For example, the Chinese patent with the authorization announcement number CN218629406U discloses a multi-aquifer medium groundwater pollutant ecosystem simulation box, which includes a transparent simulation box. The outer wall left and right sides of the transparent simulation box are fixedly connected with water injection / drainage pipes, which are in communication with the inside of the transparent simulation box. The inside of the transparent simulation box is provided with quartz sand and silt medium particles from bottom to top. This simulation box can compare the migration of pollutants under hydrogeological conditions, eliminate and degrade pollutants, and evaluate the repair effect. However, this ecosystem simulation box can only take samples through the water injection / withdrawal well pipe, lacks sampling means for areas outside the well, resulting in a small sampling range and certain limitations. UTILITY MODEL CONTENT

[0005] To solve the problem of small sampling range of existing experimental boxes, the utility model provides a multi-scale groundwater aquifer medium pollutant migration path simulation experiment box.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A multi-scale groundwater aquifer medium pollutant migration path simulation experiment box is provided, which includes a transparent box body. The inside of the transparent box body is divided into a water injection cavity, a soil cavity and a water outlet cavity in order from left to right by two water permeable plates. A pollution box for placing pollutants is placed in the soil cavity, and multiple underground well pipes are provided. Multiple water outlet holes are formed on the outer wall of each underground well pipe. Multiple sampling ports are formed on the outer wall of one side of the soil cavity. A plug can be detachably arranged in each sampling port.

[0008] In the scheme, water is injected into the water injection cavity, and the water flows out of the water outlet cavity after passing through the soil cavity. In the process of water flow, the pollutants in the pollution box migrate with the water flow in the soil cavity, simulating the migration path of pollutants in the actual groundwater environment. The scheme not only can sample water through multiple underground well pipes to understand the migration of pollutants in water and the concentration change trend, but also can be taken out through the sampling port by removing the plug, and the setting of multiple sampling ports increases the sampling position and expands the sampling range, which is beneficial to more comprehensive analysis of the migration rate and direction of pollutants.

[0009] Further, the top of the transparent box body is provided with a rainfall simulator, and the rainfall simulator includes a cuboid-shaped liquid storage tank, a plurality of spray heads are arranged on the bottom surface of the liquid storage tank, and an adjusting valve is arranged on each spray head. The setting of the rainfall simulator makes the experiment more close to the precipitation process in the natural environment, thereby improving the accuracy and reliability of the experimental results. The rainfall simulator can be communicated with the pump or directly discharge water from the spray head through the gravity of the internal water to realize the effect of simulating rainfall.

[0010] Further, the plurality of spray heads are uniformly distributed on the bottom surface of the liquid storage tank. The uniform distribution of the plurality of spray heads ensures the uniformity of the simulated rainfall, avoiding the problem of local excess or deficiency.

[0011] Further, a limiting flange in a rectangular shape is arranged on the bottom surface of the liquid storage tank, and the limiting flange is nested on the outer wall of the transparent box body. The design of the limiting flange increases the stability of the equipment, prevents displacement of the liquid storage tank during the experiment, and also helps to keep the alignment between the rainfall simulator and the transparent box body, ensuring the consistency of the experimental conditions.

[0012] Further, the outer wall bottom of the water injection cavity and the water outlet cavity is respectively provided with a water inlet pipe and a water outlet pipe. The setting of the water inlet pipe and the water outlet pipe facilitates water inlet and drainage.

[0013] Further, the plurality of underground well pipes are uniformly distributed on the lengthwise central axis of the soil cavity, and the plurality of sampling ports are arranged in a rectangular array on the outer wall of the soil cavity. The linear arrangement of the plurality of underground well pipes can sample sequentially, which is convenient for determining the concentration change trend of the pollutants. The rectangular array of the sampling ports expands the sampling range, so that water samples can be collected from different positions, which is helpful to more comprehensively understand the distribution of the pollutants in the soil and the migration characteristics thereof.

[0014] Further, the pollution box is a transparent cuboid container with an open top, and the pollution box is arranged perpendicularly to the outer wall of the soil cavity.

[0015] Further, the length of the pollution box is the same as the width inside the soil cavity, and the length of the pollution box is arranged to ensure the consistency of the distribution of the pollutants before migration.

[0016] Further, the multi-scale groundwater aquifer medium pollutant migration path simulation experiment box further comprises a soil sampler for sampling soil in the soil cavity.

[0017] Further, the soil in the soil cavity is provided with sand or rock particles. The sand or rock particles can better simulate the geological structure in the actual groundwater system, increasing the complexity and authenticity of the experimental model.

[0018] The utility model discloses a multi-scale groundwater aquifer medium pollutant migration path simulation experiment box, and its beneficial effects are:

[0019] 1. The utility model discloses a multi-scale groundwater aquifer medium pollutant migration path simulation experiment box, and its beneficial effects are:

[0020] 2. The utility model discloses a multi-scale groundwater aquifer medium pollutant migration path simulation experiment box, and its beneficial effects are: BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is an explosion view of a multi-scale groundwater aquifer medium pollutant migration path simulation experiment box.

[0022] Figure 2 It is an explosion view of a multi-scale groundwater aquifer medium pollutant migration path simulation experiment box.

[0023] 1, transparent box body, 11, water injection cavity, 12, soil cavity, 121, sampling port, 122, plug, 13, water outlet cavity, 2, rainfall simulator, 3, soil sampler, 4, water permeable plate, 5, underground well pipe, 6, pollution box. DETAILED DESCRIPTION

[0024] The specific embodiments of the utility model are described below, so that the person skilled in the art can understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific embodiments, and for the person skilled in the ordinary skill in the art, as long as various changes are within the spirit and scope of the utility model defined and determined by the appended claims, these changes are obvious, and all the utility model creations using the utility model concept are protected.

[0025] REFERENCEFigure 1 and Figure 2 The embodiment provides a multi-scale groundwater aquifer medium pollutant migration path simulation experiment box, which comprises a transparent box body 1, a rainfall simulator 2 and a soil sampler 3.

[0026] The transparent box body 1 is a long rectangular container with an open top, and the inside of the transparent box body 1 is sequentially divided into a water injection cavity 11, a soil cavity 12 and a water outlet cavity 13 from left to right by two water-permeable plates 4. The soil in the soil cavity 12 is provided with sand or rock particles. The sand or rock particles can better simulate the geological structure in the actual groundwater system, and increase the complexity and authenticity of the experimental model.

[0027] The soil cavity 12 is provided with a plurality of underground well pipes 5 and a pollution box 6 for placing pollutants. A plurality of water outlet holes are formed in the outer wall of each underground well pipe 5. The plurality of underground well pipes 5 are uniformly distributed on the lengthwise central axis of the soil cavity 12, and the linear arrangement of the plurality of underground well pipes 5 can sequentially sample the soil, thereby facilitating the determination of the concentration variation trend of the pollutants.

[0028] A plurality of sampling ports 121 are formed in the outer wall of the soil cavity 12, and a plug 122 is detachably arranged in each sampling port 121. The plurality of sampling ports 121 are arranged in a rectangular array on the outer wall of the soil cavity 12.

[0029] A water inlet pipe and a water outlet pipe are arranged on the outer wall bottom of the water injection cavity 11 and the water outlet cavity 13, respectively. The arrangement of the water inlet pipe and the water outlet pipe facilitates water inlet and drainage.

[0030] The rainfall simulator 2 is arranged on the top of the transparent box body 1. The rainfall simulator 2 comprises a liquid storage tank in the shape of a rectangular parallelepiped. A plurality of spray heads are arranged on the bottom surface of the liquid storage tank, and the plurality of spray heads are uniformly distributed on the bottom surface of the liquid storage tank. The arrangement of the rainfall simulator 2 makes the experiment more close to the precipitation process in the natural environment, thereby improving the accuracy and reliability of the experimental results. The uniform distribution of the plurality of spray heads ensures the uniformity of the simulated rainfall, avoiding the problems of local excess or deficiency.

[0031] In the embodiment, an adjusting valve is arranged on each spray head, so as to facilitate the adjustment of the simulated rainfall amount. The rainfall simulator 2 can be communicated with a pump or directly discharge water from the spray heads through the gravity of the internal water, so as to realize the effect of simulating precipitation.

[0032] The soil sampler 3 is used for sampling the soil in the soil cavity 12. The arrangement of the soil sampler 3 enables the experimenters to obtain the soil sample at a specific position without damaging the overall experimental structure, which is crucial for analyzing the processes such as immobilization and degradation of the pollutants in the soil. In the embodiment, the soil sampler can be a capillary cylindrical pipe with an open end, or a straight insertion type soil sampler in the prior art. Both of them have the advantages of convenient and fast sampling.

[0033] As a further scheme of the embodiment, a limiting flange in a rectangular shape is arranged on the bottom surface of the liquid reservoir, and the limiting flange is nested on the outer wall of the transparent box 1. The design of the limiting flange increases the stability of the device, prevents displacement of the liquid reservoir during the experiment, and also helps to maintain the alignment between the rainfall simulator 2 and the transparent box 1, ensuring the consistency of the experimental conditions.

[0034] As a specific structure of the pollution box 6, the pollution box 6 is a transparent cuboid container with an open top, and the pollution box 6 is arranged vertically to the outer wall of the soil cavity 12.

[0035] In the embodiment, the length of the pollution box 6 is the same as the width inside the soil cavity 12, and the length of the pollution box 6 is arranged to ensure the consistency of the distribution of the pollutants before migration.

[0036] In summary, the beneficial effects of the scheme are:

[0037] By injecting water into the water injection cavity 11, the water flows out of the water outlet cavity 13 after passing through the soil cavity 12. During the flow of the water, the pollutants in the pollution box 6 migrate in the soil cavity 12 along with the water flow, simulating the migration path of the pollutants in the actual groundwater environment. The scheme not only allows water sampling through multiple underground well pipes 5 to understand the migration of pollutants in water along with the water flow and the concentration change trend, but also allows sampling through the sampling port 121 by removing the plug 122. The arrangement of multiple sampling ports 121 increases the sampling position and improves the sampling range, which is conducive to more comprehensive analysis of the migration rate and migration direction of the pollutants.

[0038] Although the specific embodiments of the utility model are described in detail in combination with the drawings, it should not be understood as limiting the protection scope of the patent. Various modifications and variations made by those skilled in the art within the scope described in the claims are still within the protection scope of the patent.

Claims

1. A multi-scale groundwater aquifer media pollutant migration path simulation experimental chamber, characterized in that, The transparent box (1) is divided into a water injection chamber (11), a soil chamber (12) and a water outlet chamber (13) by two permeable plates (4) from left to right. The soil chamber (12) contains a pollution box (6) for placing pollutants and is equipped with multiple underground well pipes (5). Each underground well pipe (5) has multiple water outlet holes on its outer wall. The soil chamber (12) has multiple sampling ports (121) on one side of its outer wall. Each sampling port (121) can be detachably equipped with a plug (122).

2. The experimental chamber according to claim 1, characterized in that, The top of the transparent box (1) is provided with a rainfall simulator (2), which includes a rectangular liquid reservoir. Multiple nozzles are provided on the bottom surface of the liquid reservoir, and each nozzle is provided with a regulating valve.

3. The experimental chamber according to claim 2, characterized in that, Multiple nozzles are evenly distributed on the bottom surface of the liquid reservoir.

4. The experimental chamber according to claim 2, characterized in that, A rectangular limiting flange is provided on the bottom surface of the liquid reservoir, and the limiting flange is nested on the outer wall of the transparent box (1).

5. The experimental chamber according to claim 1, characterized in that, The bottom of the outer walls of the water injection chamber (11) and the water outlet chamber (13) are respectively provided with an inlet pipe and an outlet pipe.

6. The experimental chamber according to claim 1, characterized in that, Multiple underground well pipes (5) are evenly distributed along the length of the soil cavity (12), and multiple sampling ports (121) are arranged in a rectangular array on the outer wall of the soil cavity (12).

7. The experimental chamber according to claim 1, characterized in that, The contamination box (6) is a transparent cuboid container with an opening at the top, and the contamination box (6) is perpendicular to the outer wall of the soil cavity (12).

8. The experimental chamber according to claim 7, characterized in that, The length of the contamination box (6) is the same as the width of the soil cavity (12).

9. The experimental chamber according to claim 1, characterized in that, It also includes a soil sampler (3) for sampling the soil in the soil cavity (12).

10. The experimental chamber according to claim 1, characterized in that, The soil in the soil cavity (12) contains sand or rock particles.

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