Polluted land in-situ remediation system

Abstract

The utility model relates to the technical field of pollution treatment, in particular to a polluted land in-situ remediation system which comprises a supporting frame and a tank body located on the supporting frame, and further comprises a plurality of guide pipes arranged at the output end of the tank body, and one end of each guide pipe extends outwards from the output end of the tank body and is connected with an injection pipe; the injection pipe is connected to the cover plate; and the conveying piece conveys the repairing agent output by the output end of the tank body into the guide pipe in a pressurized mode. The injection pipes connected through the guide pipes are arranged on the peripheral side of the tank body, the repairing agent is conveyed into the injection pipes through the guide pipes and input into the injection wells through the output ends of the injection pipes, the repairing agent permeates and diffuses towards the periphery in the injection wells, and in the process, only the injection pipes need to be inserted into the injection wells, and the repairing agent can be injected into the injection wells. And therefore, the workload of workers is greatly reduced, and the overall treatment efficiency of the in-situ remediation system for the polluted land is improved.

Description

Technical Field

[0001] This utility model relates to a pollution remediation system, and more particularly to an in-situ remediation system for polluted sites, belonging to the field of pollution control technology. Background Technology

[0002] A contaminated site is a location where soil and / or groundwater have been polluted due to the production, operation, use, or storage of toxic or hazardous substances, the treatment or disposal of toxic or hazardous waste, or the migration of toxic or hazardous substances or sudden accidents, resulting in health and ecological risks and / or hazards. In-situ remediation of contaminated sites refers to the technology of remediating directly at the original contaminated site without moving the contaminated soil or groundwater. In-situ remediation technology aims to transform or remediate pollutants into harmless substances on-site, or reduce their toxicity and mobility, thereby restoring the environmental quality of soil and groundwater through a series of physical, chemical, and biological methods.

[0003] Currently, most contaminated sites are located deep in the soil. In-situ remediation of contaminated sites mainly involves using chemical remediation methods or a combination of chemical and biological remediation methods. When systematically remediating contaminated sites in situ using these methods, drilling rigs are typically used to excavate injection wells to a certain depth. To achieve efficient improvement of soil pollution and save time, workers are usually arranged to inject relevant remediation agents such as oxidants, reducing agents, and microbial agents into the injection wells immediately after the wells are completed, based on the remediation strategy formulated according to the type of pollutant. These remediation agents will permeate and diffuse from the center of the injection well to the surrounding areas. Subsequently, a monitoring system is set up around the wells to monitor changes in the soil.

[0004] However, in practice, some contaminated areas are large and require drilling more injection wells. When injecting remediation agents into each well manually, it is easy to get confused about the number of times the remediation agent is injected into the well. In addition, each injection well needs to be injected with remediation agents every once in a while to ensure continuous improvement of soil pollution, resulting in a large workload for workers and low efficiency of in-situ remediation of contaminated sites. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides an in-situ remediation system for contaminated sites that allows for simultaneous control of remediation agent injection.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0007] A contaminated site in-situ remediation system includes a support frame and a tank located on the support frame, and further includes: a plurality of conduits disposed on the output end of the tank, one end of each conduit extending outward from the output end of the tank and connected to an injection pipe; a cover plate, the injection pipe being connected to the cover plate; and a conveying component that pressurizes and delivers the remediation agent output from the output end of the tank into the conduits.

[0008] Furthermore, the conveying component includes a pump connected to the output end of the tank and a housing connected to the output end of the pump. The housing has several output ends and is connected to the input end of the conduit.

[0009] Furthermore, it also includes a controller, and a solenoid valve is provided on the output end of the housing, and the controller is electrically connected to the solenoid valve.

[0010] Furthermore, the tank is equipped with a stirrer, and the tank is equipped with a drive motor for driving the stirrer to rotate.

[0011] Furthermore, the injection pipe is composed of several outlet pipes with water outlet holes on their walls connected end to end, one end of the outlet pipe is provided with a threaded part one, and the other end of the outlet pipe is provided with a threaded part two.

[0012] Furthermore, the cover plate is provided with ground nails.

[0013] Furthermore, a frustum-shaped sealing block is connected to the side of the cover plate near the injection pipe, and the diameter of the sealing block gradually decreases as it extends outward from the cover plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This application involves installing several injection pipes connected by conduits around the perimeter of the tank. The remediation agent is delivered into the injection pipes through the conduits and then fed into the injection wells from the output end of the injection pipes. The remediation agent diffuses and seeps into the surrounding area within the injection wells. During this process, the remediation agent can be introduced into the injection wells at regular intervals and in measured quantities simply by inserting the injection pipes into the injection wells. Compared to manual injection, this method can inject the remediation agent into multiple injection wells simultaneously, ensuring that the remediation agent in multiple injection wells diffuses outwards at the same time, improving the remediation effect of contaminated soil, greatly reducing the workload of workers, and improving the overall treatment efficiency of the in-situ remediation system for contaminated sites. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the isometric three-dimensional structure provided by this utility model;

[0017] Figure 2 This is a schematic diagram of the exploded structure of the agitator and tank provided by this utility model;

[0018] Figure 3 A schematic diagram of the closed block planar structure provided by this utility model;

[0019] Figure 4 This is a schematic diagram of the explosion structure of the injection tube provided by this utility model.

[0020] In the diagram, 1. Support frame; 2. Tank body; 3. Conduit; 4. Injection pipe; 5. Cover plate; 6. Pump; 7. Box body; 8. Solenoid valve; 9. Controller; 10. Drive motor; 11. Agitator; 12. Water outlet pipe; 13. Water outlet hole; 14. Threaded part one; 15. Threaded part two; 16. Ground nail; 17. Sealing block; 18. Injection port; 19. Pipe cover. Detailed Implementation

[0021] The technical solution of this utility model will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1-4 As shown, the in-situ remediation system for contaminated sites provided in this embodiment includes a support frame 1 and a tank 2 located on the support frame 1. The tank 2 is provided with an injection port 18, through which the remediation agent for pollution control is delivered into the tank 2. An appropriate amount of remediation agent is selected according to the actual usage. The remediation agent is a common remediation agent in in-situ remediation systems for contaminated sites, such as oxidants, reducing agents, and microbial remediation agents. Common oxidants include permanganate, hydrogen peroxide, Fenton's reagent, persulfate, and ozone. Common reducing agents include hydrogen sulfide, sodium dithionite, sodium bisulfite, ferrous sulfate, calcium polysulfide, ferrous iron, and ferrous iron. Common microbial remediation agents (with oxygen supply depending on the situation) are usually degrading bacteria to decompose organic pollutants such as petroleum hydrocarbons and pesticides. When using it, it is only necessary to select an appropriate remediation agent according to the type and degree of contamination of the contaminated site.

[0023] The device also includes several conduits 3, a cover plate 5, and conveying components installed at the output end of the tank 2;

[0024] One end of the conduit 3 extends outward from the output end of the tank 2 and is connected to the injection pipe 4. The conduit 3 is used to transport the repair agent. The output end of the tank 2 is located at its bottom. When the tank 2 contains the repair agent, the repair agent will flow in through the input end of the conduit 3 and flow out through the output end of the conduit 3. Finally, the repair agent is transported to the injection pipe 4. The injection pipe 4 is mainly used to inject the repair agent introduced into the conduit 3 into the pre-dug injection well.

[0025] When using the injection pipe 4, it is first placed into the pre-dug injection well. The diameter of the injection pipe 4 is not limited in this application, but the specific size depends on the diameter of the injection well. When the injection pipe 4 is inserted into the injection well, a cover plate 5 is provided to ensure the stability of the injection pipe 4. The injection pipe 4 is connected to the cover plate 5. When the injection pipe 4 is placed in the injection well, the cover plate 5 is in contact with the ground at the well opening. With the support of the cover plate 5, the injection pipe 4 is stable in the injection well. In order to maintain the stability of the injection pipe 4 during use, ground nails 16 are provided on the cover plate 5. When the cover plate 5 contacts the ground, the ground nails 16 are used to fix the cover plate 5 to the ground.

[0026] The conveying component pressurizes and delivers the repair agent output from the output end of tank 2 into the conduit 3, accelerating the flow rate of the repair agent, and outputting it at the output end of injection pipe 4. As the repair agent is continuously injected into the injection well, it will continuously squeeze the repair agent in the injection well, causing the repair agent to seep into and diffuse into the soil.

[0027] To facilitate the opening and closing of the conduit 3, the device also includes a controller 9. A solenoid valve 8 is provided on the output end of the housing 7, and the solenoid valve 8 is also located at the input end of the conduit 3. The controller 9 is electrically connected to the solenoid valve 8. The opening and closing of the corresponding solenoid valve 8 can be controlled by manipulating the controller 9 or by setting the control parameters, thereby controlling whether the corresponding conduit 3 is connected to the housing 7. The method by which the controller 9 controls the opening and closing of the solenoid valve 8 is conventional technology in the field and will not be described in detail in this application.

[0028] In use, the remediation agent is first placed in the tank 2, and the injection pipe 4 is inserted into the corresponding injection well. The controller 9 controls the corresponding solenoid valve 8 to open, and the conveying component delivers the remediation agent inside the tank 2 to the conduit 3. The remediation agent is then delivered to the injection pipe 4 through the conduit 3, and input into the injection well from the output end of the injection pipe 4. The remediation agent seeps and diffuses in all directions within the injection well. During this process, the remediation agent can be introduced into the injection well at regular intervals and in measured quantities simply by inserting the injection pipe 4 into the injection well. Compared with manual injection, this method can inject the remediation agent into multiple injection wells at the same time, ensuring that the remediation agent in multiple injection wells diffuses to the surrounding area simultaneously, improving the treatment effect of contaminated soil, greatly reducing the workload of workers, and improving the overall treatment efficiency of the in-situ remediation system for contaminated sites.

[0029] Among them, such as Figure 1 as well as Figure 2 As shown, the conveying component includes a pump 6 connected to the output end of the tank 2 and a housing 7 connected to the output end of the pump 6. The housing 7 has several output ends and is connected to the input end of the conduit 3. The pump 6 pumps the repair agent located inside the tank 2 out and introduces it into the housing 7. The repair agent is then introduced into the dispersed conduit 3 through the housing 7.

[0030] A stirrer 11 is installed inside the tank 2 to prevent the repair agent inside from settling due to prolonged storage. The tank 2 is equipped with a drive motor 10 to drive the stirrer 11 to rotate. The output interface of the controller 9 is also electrically connected to the drive motor 10 to control the start and stop of the drive motor 10. It can be set to start and stop at specific times to achieve the purpose of stirring the repair agent inside the tank 2.

[0031] The injection pipe 4 is composed of several outlet pipes 12 with outlet holes 13 on their walls, connected end to end. One end of the outlet pipe 12 is provided with a threaded part 14, and the other end of the outlet pipe 12 is provided with a threaded part 15. A pipe cap 19 is connected to the bottom outlet pipe 12 to seal one end of the injection pipe 4. In use, the threaded part 14 of one outlet pipe 12 is threaded to the threaded part 15 of another outlet pipe 12, thereby changing the overall length of the injection pipe 4 to adapt to the depth of the injection well and improve the practicality of the injection pipe 4.

[0032] To enhance the sealing effect of the cover plate 5 on the injection well, a frustum-shaped sealing block 17 is connected to the side of the cover plate 5 near the injection pipe 4. The diameter of the sealing block 17 gradually decreases as it extends outward from the cover plate 5. When the cover plate 5 is placed over the inlet of the injection well, the sealing block 17 will be inserted into the injection well, thereby sealing the wellhead, increasing the sealing of the wellhead, and preventing the repair agent from overflowing from the wellhead.

[0033] The foregoing description illustrates and describes preferred embodiments of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein. Any modifications and variations made by those skilled in the art without departing from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A system for in-situ remediation of contaminated ground comprising a support frame (1) and a tank (2) located on the support frame (1), characterised in that: Also include: A plurality of pipes (3) arranged on the output end of the tank body (2), one end of the pipe (3) extends outward from the output end of the tank body (2) and is connected with an injection pipe (4); A cover plate (5), the injection pipe (4) is connected on the cover plate (5); A conveying member, which pressurizes the repair agent output from the output end of the tank body (2) and conveys it into the pipe (3).

2. The system for in-situ remediation of contaminated sites according to claim 1, characterized in that: The conveying member includes a pump (6) connected on the output end of the tank body (2) and a box (7) connected on the output end of the pump (6), the box (7) is provided with a plurality of output ends and is connected with the input ends of the pipes (3).

3. The system for in-situ remediation of contaminated sites according to claim 2, characterized in that: Also include a controller (9), the output end of the box (7) is provided with a solenoid valve (8), the controller (9) is electrically connected with the solenoid valve (8).

4. The system for in-situ remediation of contaminated sites according to claim 1, characterized in that: The tank body (2) is provided with an agitator (11), the tank body (2) is provided with a driving motor (10) for driving the agitator (11) to rotate.

5. The system for in-situ remediation of contaminated sites according to claim 1, characterized in that: The injection pipe (4) is composed of a plurality of water outlet pipes (12) with water outlet holes (13) on the pipe wall connected end to end, one end of the water outlet pipe (12) is provided with a threaded part one (14), the other end of the water outlet pipe (12) is provided with a threaded part two (15).

6. The system for in-situ remediation of contaminated sites according to claim 1, characterized in that: The cover plate (5) is provided with a ground nail (16).

7. The system for in-situ remediation of contaminated sites according to claim 6, characterized in that: The cover plate (5) is connected with a circular truncated cone shaped sealing block (17) on the side close to the injection pipe (4), the diameter of the sealing block (17) gradually decreases when extending outward from the cover plate (5).

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