An experimental device for simulating in-situ remediation of river sediment pollution

Abstract

The utility model discloses a kind of experimental devices for simulating river sediment pollution in-situ repair, belong to sediment experimental research technical field, including double-layer movable support, and side-by-side setting in double-layer movable support upper layer's sediment in-situ repair simulation experiment box and reagent tank that are equipped with sediment, and side-by-side setting in double-layer movable support lower layer's raw water tank and backwater tank that are equipped with river raw water and power box setting in backwater tank side, wherein, the two sides of sediment in-situ repair simulation experiment box upper portion side wall are communicated with raw water tank and backwater tank respectively through raw water delivery metering component and L type overflow pipe, and raw water tank and backwater tank are connected by communicating pipe, and reagent tank is communicated with the inside of sediment in-situ repair simulation experiment box by reagent delivery metering component and can deliver reagent to its sediment, the utility model can accurately simulate real river water environment, realize reagent diversification, accurate dosing, and can accurately obtain reliable experimental result.

Description

Technical Field

[0001] This invention belongs to the field of sediment experimental research technology, specifically relating to an experimental device for simulating in-situ remediation of river sediment pollution. Background Technology

[0002] River sediments are an important component of ecosystems, but also a source of pollutants. In-situ remediation technology, which treats pollutants on-site, is a crucial means of addressing river sediment pollution. Currently, in-situ remediation of river sediments mainly includes in-situ physical, in-situ chemical, and in-situ bioremediation. Laboratory simulations of in-situ remediation of river sediments can provide important reference data for engineering solutions to river sediment pollution.

[0003] Most existing in-situ sediment remediation experiments involve retrieving contaminated sediments from the site, treating them, placing them in an experimental apparatus, adding reagents, and simulating the removal of contaminants. Current shortcomings include: the lack of consideration of the influence of river water on the in-situ sediment remediation process, such as river water environmental factors like water temperature, pH, and dissolved oxygen; the use of reagents, mostly in single-use or batch additions, with the batch addition method being relatively simple and failing to consider the impact of continuous reagent addition on sediment remediation; and the small gradient and narrow range of reagent dosage settings in the experiments, lacking a clear quantitative relationship between reagent dosage and sediment remediation effect. These shortcomings limit the accuracy and reliability of the experimental results and cannot provide sufficient scientific basis for subsequent research and practical applications.

[0004] Therefore, there is a need for an experimental device that can accurately simulate the real river water environment, achieve reagent diversification, precise dosing, and accurately obtain experimental results for the in-situ remediation of river sediment pollution. Utility Model Content

[0005] The purpose of this invention is to provide an experimental device for simulating in-situ remediation of river sediment pollution, which can accurately simulate the real river water environment, achieve diversified and precise dosing of reagents, and accurately obtain reliable experimental results.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An experimental device for simulating in-situ remediation of river sediment pollution includes a double-layer movable support, a sediment in-situ remediation simulation experimental chamber containing sediment and a reagent tank arranged side-by-side on the upper layer of the double-layer movable support, a raw water tank and a return water tank containing river raw water arranged side-by-side on the lower layer of the double-layer movable support, and a power supply box located on one side of the return water tank. The upper and lower parts of the front wall of the sediment in-situ remediation simulation experimental chamber are respectively provided with overlying water sampling holes and sediment sampling holes. The two side walls of the upper part of the sediment in-situ remediation simulation experimental chamber are connected to the raw water tank and the return water tank through a raw water delivery metering component and an L-shaped overflow pipe, respectively. The raw water tank and the return water tank are connected by a connecting pipe. The reagent tank is connected to the interior of the sediment in-situ remediation simulation experimental chamber through a reagent delivery metering component and can deliver reagents to the sediment. The power supply box is connected to both the raw water delivery metering component and the reagent delivery metering component to provide them with power.

[0008] A further improvement of this utility model is that: the upper two side walls of the sediment in-situ remediation simulation test chamber are respectively provided with an inlet and an overflow outlet; the raw water tank is connected to the inlet of the sediment in-situ remediation simulation test chamber through a raw water delivery metering component; and the return water tank is connected to the overflow outlet of the sediment in-situ remediation simulation test chamber through an L-shaped overflow pipe.

[0009] A further improvement of the present invention is that the raw water delivery metering component includes a raw water pump located inside the raw water tank and connected to the power supply box, an L-shaped inlet pipe with one end connected to the raw water pump and the other end connected to the inlet of the sediment in-situ remediation simulation experimental chamber, and a raw water flow meter installed on the vertical pipe section of the L-shaped inlet pipe.

[0010] A further improvement of the present invention is that the reagent delivery and metering assembly includes a dosing pump located inside the reagent tank and connected to the power supply box, an L-shaped inlet pipe with one end connected to the dosing pump and the other end having two vertical connecting pipes connected in parallel at the bottom, a flexible hose interface connected to the two vertical connecting pipes of the L-shaped inlet pipe and penetrating through the top wall of the sediment in-situ remediation simulation experimental chamber and extending into its inner cavity, a dosing rod connected to the lower end of the two flexible hose interfaces and extending into the sediment of the sediment in-situ remediation simulation experimental chamber, and a reagent flow meter installed on the vertical pipe section of the L-shaped inlet pipe.

[0011] A further improvement of this utility model is that the bottom of the sediment in-situ remediation simulation experimental chamber, the reagent tank, the raw water tank, and the return water tank are all equipped with drainage pipes.

[0012] A further improvement of this utility model is that: a shut-off valve is provided on the vertical pipe sections of the drain pipe, connecting pipe, L-shaped overflow pipe, L-shaped inlet pipe, L-shaped medicine inlet pipe, and their two vertical connecting pipes. The shut-off valve on the vertical pipe section of the L-shaped inlet pipe is located below the raw water flow meter, and the shut-off valve on the vertical pipe section of the L-shaped medicine inlet pipe is located below the medicine flow meter.

[0013] A further improvement of this utility model is that a raw water agitator and a chemical agitator are respectively installed on the raw water tank and the chemical tank.

[0014] A further improvement of the present invention is that the sediment sampling holes include several holes that are vertically and evenly spaced at the lower part of the front wall of the sediment in-situ remediation simulation test chamber.

[0015] A further improvement of this utility model is that a number of dosing holes are evenly spaced around the lower side wall of the dosing rod.

[0016] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows:

[0017] This invention relates to an experimental device for simulating in-situ remediation of river sediment pollution. It can be used to simulate the migration and transformation process of pollutants in river water in overlying water and sediments. Through a dosing device, remediation agents can be quantitatively and continuously added to the polluted sediments to simulate the in-situ remediation process of polluted sediments, thereby improving the accuracy and reliability of experimental results and providing important data references for subsequent engineering applications.

[0018] This invention employs a raw water tank, a sediment in-situ remediation simulation experimental chamber, and a return water tank, forming a circulating water circuit through a raw water delivery metering component, an L-shaped overflow pipe, and a connecting pipe. A raw water pump draws water from the raw water tank, and after the flow rate is controlled by a raw water flow meter, the water is injected into the experimental chamber. Excess water flows back to the return water tank through the overflow port and the L-shaped overflow pipe, and then back to the raw water tank through the connecting pipe. This system realistically simulates river flow and allows for adjustment of environmental factors such as water temperature, pH value, and dissolved oxygen according to the on-site environment, making the simulated water sample more closely resemble actual conditions and providing a realistic and reliable simulation environment for the experiment.

[0019] This invention employs a sediment in-situ remediation simulation test chamber with overlying water sampling holes on the upper and lower parts of the front wall, respectively. The sediment sampling holes contain multiple vertically spaced holes, enabling the collection of sediment samples from different depths. The overlying water sampling holes facilitate the accurate acquisition of overlying water samples at any time, providing researchers with accurate and diverse sample collection methods, which helps to comprehensively analyze the conditions of sediments and overlying water.

[0020] The reagent tank of this invention is connected to the interior of the sediment in-situ remediation simulation experimental chamber via a reagent delivery and metering component. The combination of a dosing pump, a reagent flow meter, an L-shaped inlet pipe, and a dosing rod enables quantitative and continuous dosing of reagents into the sediment. Multiple dosing holes are provided on the lower side wall of the dosing rod to ensure uniform delivery of reagents to the sediment, facilitating researchers' accurate assessment of the impact of reagent dosage on the in-situ remediation effect and providing precise experimental conditions for studying sediment contamination in-situ remediation.

[0021] This invention employs a double-layer movable support structure, placing the sediment in-situ remediation simulation experimental chamber and reagent tank on the upper layer, and the raw water tank and return water tank on the lower layer. The power supply box is rationally located on one side of the return water tank. This layout ensures that the components of the device are compactly and orderly distributed, facilitating experimental operation. Furthermore, the lower support plate is equipped with casters at its bottom, allowing for flexible movement of the experimental device as needed and rapid transfer to different experimental sites, thus improving the device's applicability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the experimental device for simulating in-situ remediation of river sediment pollution according to this utility model;

[0023] Figure 2 This is a schematic diagram of the dosing rod in the experimental device for simulating in-situ remediation of river sediment pollution according to this utility model;

[0024] The components include: 1. Double-layer movable support; 2. Raw water agitator; 3. Raw water tank; 4. Raw water pump; 5. Drain pipe; 6. Connecting pipe; 7. Return water tank; 8. Power supply box; 9. Shut-off valve; 10. Raw water flow meter; 11. Sediment in-situ remediation simulation experimental chamber; 12. Overlying water sampling port; 13. Sediment sampling port; 14. Hose interface; 15. Dosing rod; 16. L-shaped overflow pipe; 17. Chemical flow meter; 18. Chemical agitator; 19. Chemical tank; 20. Dosing pump; 21. Dosing port. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to embodiments:

[0026] like Figure 1As shown, this utility model provides an experimental device for simulating in-situ remediation of river sediment pollution. It mainly includes a double-layer movable support 1, a sediment in-situ remediation simulation experimental chamber 11 containing sediment, a reagent tank 19, a raw water tank 3 containing river water, a return water tank 7, and a power supply box 8 for power generation. The double-layer movable support 1 has an upper and lower double-layer structure, including two corresponding support plates and two corresponding moving wheels at the bottom of the lower support plate. The sediment in-situ remediation simulation experimental chamber 11 and the reagent tank 19 are arranged side-by-side on the upper support plate of the double-layer movable support 1. The raw water tank 3 and the return water tank 7 are arranged side-by-side on the lower support plate of the double-layer movable support 1. The power supply box 8 is located on one side of the return water tank 7, i.e., the return water tank 7 is located between the raw water tank 3 and the power supply box 8.

[0027] Specifically, the upper and lower parts of the front wall of the sediment in-situ remediation simulation test chamber 11 are respectively provided with overlying water sampling holes 12 and sediment sampling holes 13. That is, the overlying water sampling holes 12 are located on the upper part of the front wall of the sediment in-situ remediation simulation test chamber 11, and the sediment sampling holes 13 are located on the lower part of the front wall of the sediment in-situ remediation simulation test chamber 11, so as to sample the overlying water and sediment. The sediment sampling holes 13 include several holes that are vertically and evenly spaced on the lower part of the front wall of the sediment in-situ remediation simulation test chamber 11. The overlying water sampling holes 12 are equipped with water outlet interfaces for convenient sampling at any time.

[0028] Furthermore, the two side walls of the upper part of the sediment in-situ remediation simulation test chamber 11 are connected to the raw water tank 3 and the return water tank 7 respectively through the raw water delivery metering component and the L-shaped overflow pipe 16, and the power supply box 8 is connected to the raw water delivery metering component to provide it with power. Specifically, the upper two side walls of the sediment in-situ remediation simulation test chamber 11 are respectively provided with an inlet and an overflow. The raw water tank 3 is connected to the inlet of the sediment in-situ remediation simulation test chamber 11 through the raw water delivery metering component, so that the raw water tank 3 can inject river raw water into the sediment in-situ remediation simulation test chamber 11 containing sediment through the raw water delivery metering component and the inlet. The return water tank 7 is connected to the overflow of the sediment in-situ remediation simulation test chamber 11 through the L-shaped overflow pipe 16. The raw water tank 3 and the return water tank 7 are connected by a connecting pipe 6, so that the excess raw water in the sediment in-situ remediation simulation test chamber 11 overflows from the overflow port and flows back to the return water tank 7 through the L-shaped overflow pipe 16, and then flows back to the raw water tank 3 through the connecting pipe 6, thus forming a circulating water path.

[0029] Furthermore, the raw water delivery and metering components include a raw water pump 4, an L-shaped inlet pipe, and a raw water flow meter 10. The raw water pump 4 is located inside the raw water tank 3 and connected to the power supply box 8. One end of the L-shaped inlet pipe is connected to the raw water pump 4, and the other end is connected to the inlet of the sediment in-situ remediation simulation experimental chamber 11. The raw water flow meter 10 is installed on the vertical section of the L-shaped inlet pipe. The river raw water in the raw water tank 3 can be pumped by the raw water pump 4 and injected into the sediment in-situ remediation simulation experimental chamber 11 through the L-shaped inlet pipe. The raw water flow rate can be controlled by the raw water pump 4 and the raw water flow meter 10 to realistically simulate the river flow state. The water temperature, pH value, and dissolved oxygen of the raw water can be adjusted appropriately according to the site environment to ensure that the simulated water sample is consistent with the site water sample. Environmental factors of the water sample can also be adjusted at any time according to the experiment. Reagents will be added to the raw water as needed. A raw water stirrer 2 is installed on the raw water tank 3 to stir the water sample and make it uniform.

[0030] In order to quantitatively and continuously add chemicals to the sediment in the lower part of the sediment in-situ remediation simulation test chamber 11 and accurately evaluate the effect of chemical dosage on the in-situ remediation effect, the chemical tank 19 is connected to the interior of the sediment in-situ remediation simulation test chamber 11 through the chemical delivery metering component and can deliver chemicals to its sediment. The power supply box 8 is connected to the chemical delivery metering component to provide it with power.

[0031] Specifically, the reagent delivery and metering assembly includes a dosing pump 20, an L-shaped inlet pipe, two hose interfaces 14, and two dosing rods 15. The dosing pump 20 is located inside the reagent tank 19 and connected to the power supply box 8. One end of the L-shaped inlet pipe is connected to the dosing pump 20, and two vertical connecting pipes are connected in parallel at the bottom of the other end. The two hose interfaces 14 are respectively connected to the two vertical connecting pipes of the L-shaped inlet pipe and extend through the top wall of the sediment in-situ remediation simulation experimental chamber 11 into its inner cavity. The two dosing rods 15 are respectively connected to the lower ends of the two hose interfaces 14 and extend into the sediment in the sediment in-situ remediation simulation experimental chamber 11. The reagent flow meter 17 is installed on the vertical section of the L-shaped inlet pipe, and a reagent stirrer 18 is installed on the reagent tank 19. The in-situ remediation agent can be prepared in the agent tank 19 and stirred evenly by the agent stirrer 18. Then, it is quantitatively and continuously delivered into the sediment interior of the sediment in the in-situ remediation simulation experimental chamber 11 through the dosing pump 20 and agent flow meter 17 via an L-shaped inlet pipe and two dosing rods 15. To ensure uniform delivery of the agent to the sediment, such as... Figure 2 As shown, a number of dosing holes 21 are evenly spaced around the lower side wall of the dosing rod 15.

[0032] To facilitate control of the flow direction of raw water or chemicals, shut-off valves 9 are installed on the vertical sections of the drain pipe 5, connecting pipe 6, L-shaped overflow pipe 16, L-shaped inlet pipe, L-shaped chemical inlet pipe, and their two vertical connecting pipes. The shut-off valve 9 on the vertical section of the L-shaped inlet pipe is located below the raw water flow meter 10, and the shut-off valve 9 on the vertical section of the L-shaped chemical inlet pipe is located below the chemical flow meter 17.

[0033] In addition, the bottom of the sediment in-situ remediation simulation test chamber 11, the reagent tank 19, the raw water tank 3, and the return water tank 7 are all equipped with drain pipes 5 to facilitate drainage and cleaning devices.

[0034] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. An experimental apparatus for simulating in-situ remediation of river sediment pollution, characterized in that: The system includes a double-layer movable support (1), a sediment in-situ remediation simulation test chamber (11) containing sediment and a reagent tank (19) arranged side by side on the upper layer of the double-layer movable support (1), a raw water tank (3) containing river raw water and a return water tank (7) arranged side by side on the lower layer of the double-layer movable support (1), and a power supply box (8) arranged on one side of the return water tank (7). The upper and lower parts of the front wall of the sediment in-situ remediation simulation test chamber (11) are respectively provided with an overlying water sampling hole (12) and a sediment sampling hole (13). Furthermore, the two side walls of the upper part of the sediment in-situ remediation simulation test chamber (11) are connected to the raw water tank (3) and the return water tank (7) through the raw water delivery metering component and the L-shaped overflow pipe (16), respectively. The raw water tank (3) and the return water tank (7) are connected by the connecting pipe (6). The reagent tank (19) is connected to the interior of the sediment in-situ remediation simulation test chamber (11) through the reagent delivery metering component and can deliver reagents to its sediments. The power supply box (8) is connected to the raw water delivery metering component and the reagent delivery metering component respectively to provide them with power.

2. The experimental apparatus for simulating in-situ remediation of river sediment pollution according to claim 1, characterized in that: The upper two side walls of the sediment in-situ remediation simulation test chamber (11) are respectively provided with an inlet and an overflow. The raw water tank (3) is connected to the inlet of the sediment in-situ remediation simulation test chamber (11) through the raw water delivery metering component, and the return water tank (7) is connected to the overflow of the sediment in-situ remediation simulation test chamber (11) through the L-shaped overflow pipe (16).

3. The experimental apparatus for simulating in-situ remediation of river sediment pollution according to claim 2, characterized in that: The raw water delivery metering assembly includes a raw water pump (4) located inside the raw water tank (3) and connected to the power supply box (8), an L-shaped water inlet pipe with one end connected to the raw water pump (4) and the other end connected to the inlet of the sediment in-situ remediation simulation experimental box (11), and a raw water flow meter (10) installed on the vertical pipe section of the L-shaped water inlet pipe.

4. The experimental apparatus for simulating in-situ remediation of river sediment pollution according to claim 3, characterized in that: The drug delivery and metering assembly includes a dosing pump (20) located inside the drug tank (19) and connected to the power supply box (8), an L-shaped drug inlet pipe with two vertical connecting pipes connected at one end to the dosing pump (20) and the bottom of the other end, a flexible hose interface (14) connected to the two vertical connecting pipes of the L-shaped drug inlet pipe and extending through the top wall of the sediment in-situ remediation simulation experimental box (11) into its inner cavity, a dosing rod (15) connected to the lower end of the two flexible hose interfaces (14) and extending into the sediment of the sediment in-situ remediation simulation experimental box (11), and a drug flow meter (17) set on the vertical pipe section of the L-shaped drug inlet pipe.

5. The experimental apparatus for simulating in-situ remediation of river sediment pollution according to claim 4, characterized in that: The bottom of the sediment in-situ remediation simulation experimental box (11), the reagent box (19), the raw water box (3) and the return water box (7) are all equipped with drainage pipes (5).

6. The experimental apparatus for simulating in-situ remediation of river sediment pollution according to claim 5, characterized in that: The vertical sections of the drain pipe (5), connecting pipe (6), L-shaped overflow pipe (16), L-shaped inlet pipe, L-shaped inlet pipe, and L-shaped inlet pipe, as well as their two vertical connecting pipes, are all equipped with shut-off valves (9). The shut-off valve (9) on the vertical section of the L-shaped inlet pipe is located below the raw water flow meter (10), and the shut-off valve (9) on the vertical section of the L-shaped inlet pipe is located below the drug flow meter (17).

7. An experimental apparatus for simulating in-situ remediation of river sediment pollution according to any one of claims 1-6, characterized in that: The raw water tank (3) and the medicine tank (19) are respectively equipped with a raw water agitator (2) and a medicine agitator (18).

8. The experimental apparatus for simulating in-situ remediation of river sediment pollution according to claim 7, characterized in that: The sediment sampling holes (13) include several holes that are vertically and evenly spaced at the lower part of the front wall of the sediment in-situ remediation simulation test chamber (11).

9. An experimental apparatus for simulating in-situ remediation of river sediment pollution according to claim 4, characterized in that: The dosing rod (15) has a number of dosing holes (21) evenly spaced around its lower sidewall.

Images