Self-cleaning type in-situ leaching equipment for lightly and moderately polluted soil

Abstract

The utility model discloses self-cleaning type in-situ leaching equipment for lightly and moderately polluted soil. The self-cleaning type in-situ leaching equipment comprises a main body structure, the main body structure comprises a water injection well and a water pumping well, the water injection well is communicated with the water pumping well through a connecting pipeline, a leaching disc is arranged in the water injection well, and a plurality of groups of liquid injection pipes for injecting leaching liquid into soil are distributed at the bottom of the leaching disc; electric push rods are symmetrically installed at the top of the water injection well, the lower ends of telescopic rods of the electric push rods penetrate through the top of the water injection well and are fixedly connected to the top of the leaching disc, and a water injection pipe used for inputting leacheate through a pump body is arranged in the center of the top of the leaching disc and slidably inserted into the top of the water injection well; an annular scraping ring is arranged on the outer wall of the drip washing disc, and the outer wall of the scraping ring and the inner wall of the water injection well are arranged in a small clearance fit mode. Soil and residual pollutants attached to the inner wall of the water injection well can be effectively scraped, complex manual cleaning operation is not needed, and time and labor cost are saved.

Description

Technical Field

[0001] This utility model relates to the field of soil remediation equipment technology, specifically a self-cleaning in-situ rinsing equipment for lightly to moderately contaminated soil. Background Technology

[0002] In-situ soil leaching refers to the application of leachate to the soil through injection wells, allowing it to penetrate downwards, cross the contaminated zone, and combine with contaminants. Through desorption, dissolution, or complexation, it ultimately forms mobile compounds. The contaminated solution can be collected, stored, and further processed using extraction wells for reuse in treating contaminated soil. This technology requires the construction of in-situ remediation facilities, including a leaching solution dosing system, a subsoil leachate collection system, and a leachate treatment system. Simultaneously, it is necessary to contain the contaminated area, typically using physical barriers or containment techniques.

[0003] Soil pollution is becoming increasingly serious during industrial production and agricultural activities. For lightly to moderately polluted soil, in-situ leaching is an effective remediation method. However, existing in-situ soil leaching equipment lacks self-cleaning function. During use, soil easily adheres to the inner wall of the equipment. If it is not cleaned, the residual pollutants may interfere with subsequent leaching work. If complex cleaning operations are performed manually after use, it will consume a lot of time and manpower. Utility Model Content

[0004] The purpose of this invention is to provide a self-cleaning in-situ rinsing device for lightly to moderately contaminated soil. The driven scraper ring can effectively scrape off the soil and residual pollutants attached to the inner wall of the injection well without the need for complicated manual cleaning operations, saving time and labor costs. At the same time, it avoids the interference of residual pollutants on subsequent rinsing work, ensuring the continuity and effectiveness of the rinsing work, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A self-cleaning in-situ leaching device for lightly to moderately contaminated soil includes:

[0007] Main structure;

[0008] The main structure includes an injection well and a pumping well, which are connected by a connecting pipe. The injection well is equipped with a rinsing plate inside, and multiple sets of injection pipes for injecting rinsing liquid into the soil are distributed at the bottom of the rinsing plate.

[0009] The top of the water injection well is symmetrically provided with an electric push rod, the lower end of the telescopic rod of the electric push rod penetrates the top of the water injection well and is fixedly connected to the top of the leaching tray, the top center of the leaching tray is provided with a water injection pipe for inputting leaching liquid through a pump body, the water injection pipe is slidingly inserted into the top of the water injection well, and the outer wall of the leaching tray is provided with an annular scraping ring, and the outer wall of the scraping ring and the inner wall of the water injection well are arranged in small gap cooperation.

[0010] Preferably, the liquid injection pipe is distributed with multiple rings with the bottom center of the leaching tray as the center, and multiple groups of main water pipes in the multiple rings are arranged in different lengths to form a layered design, so that the liquid injection pipes in different layers have different depths in the soil.

[0011] Preferably, the connecting pipeline is arranged in an inclined manner, and the higher end of the connecting pipeline is communicated with the water injection well, and the lower end of the connecting pipeline is communicated with the water pumping well.

[0012] Preferably, the cross section of the scraping ring is designed in a wedge shape.

[0013] Preferably, the water pumping well is provided with a water pumping pipe, the water pumping pipe is used for pumping out the leaching liquid discharged from the water injection well through the pump body, and the lower end of the water pumping pipe is located at the inner bottom of the water pumping well.

[0014] Preferably, the inner wall of the water pumping well is provided with a supporting ring, a filter screen plate for filtering soil and impurities in waste liquid is arranged on the supporting ring, a sleeve ring is arranged at the central position of the filter screen plate, and the sleeve ring is sleeved on the outside of the water pumping pipe.

[0015] Preferably, the outer wall of the sleeve ring is provided with a support, and the end of the support is connected to the inner wall of the frame of the filter screen plate.

[0016] Preferably, a surrounding edge is arranged on the frame of the filter screen plate, the height of the surrounding edge is 5-10 cm, and the included angle of the inner wall of the surrounding edge in the vertical direction is 10-15 degrees.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1、The electric push rod arranged at the top of the water injection well can drive the leaching tray to move up and down, the annular scraping ring of the outer wall of the leaching tray is matched with the inner wall of the water injection well in a small gap, and the cross section of the scraping ring is designed in a wedge shape. After the equipment is used, driving the scraping ring to move downward can effectively scrape off the soil and residual pollutants attached to the inner wall of the water injection well, without the need for manual complex cleaning operation, time and labor cost are saved, and the continuity and effect of the leaching work are guaranteed.

[0019] 2. The height position of the leaching tray can be flexibly controlled through the electric push rod, and then the depth of the liquid injection pipe in the water injection well is adjusted to adapt to the leaching requirements of the soil with different depths and pollution levels, so that the leaching liquid can be more accurately injected into the target soil layer, and the targeting and effectiveness of leaching are improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the utility model;

[0021] Figure 2 It is a structural schematic view of the leaching tray of the utility model;

[0022] Figure 3 It is a structural schematic view of the scraping ring of the utility model;

[0023] Figure 4 It is a structural schematic view of the water pumping well of the utility model.

[0024] In the drawing: 1, water injection well; 2, water pumping well; 3, connecting pipeline; 4, leaching tray; 5, water injection pipe; 6, electric push rod; 7, liquid injection pipe; 8, scraping ring; 9, water pumping pipe; 10, supporting ring; 11, filter screen; 12, surrounding edge; 13, support; 14, sleeve ring. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] Please refer to Figures 1-4 The utility model provides a technical scheme:

[0027] A self-cleaning type light and medium pollution soil in-situ leaching equipment, comprising:

[0028] The main body structure comprises a water injection well 1 and a water pumping well 2, the water injection well 1 and the water pumping well 2 are connected in communication through a connecting pipeline 3, the water injection well 1 is internally provided with a leaching tray 4, and the bottom of the leaching tray 4 is distributed with a plurality of groups of liquid injection pipes 7 for injecting leaching liquid into the soil; the water pumping well 2 is internally provided with a water pumping pipe 9, the water pumping pipe 9 is used for pumping out the leaching liquid discharged from the water injection well 1 through a pump body, and the lower end of the water pumping pipe 9 is located at the inner bottom of the water pumping well 2. The connecting pipeline 3 is obliquely arranged, one end of the connecting pipeline 3 higher in position is communicated with the water injection well 1, and the other end of the connecting pipeline 3 lower in position is communicated with the water pumping well 2.

[0029] In specific use, the device is hoisted, the contaminated soil is clamped into the inner cavity through the lower end of the injection well 1, the injection well 1 is used for injecting the leaching liquid, and the leaching tray 4 in the inner cavity delivers the leaching liquid to the soil through a plurality of groups of liquid injection pipes 7. The water pumping well 2 is responsible for pumping the leaching liquid containing the pollutants after leaching, and the pumping operation is realized through the pump body and the water pumping pipe 9. The connecting pipeline 3 is arranged in an inclined manner, the liquid level of the leaching liquid in the injection well 1 rises through the connecting pipeline 3 after the leaching liquid in the injection well 1 plays a leaching role, so that the leaching liquid in the injection well 1 can flow to the water pumping well 2 naturally.

[0030] The basic framework of the soil in-situ leaching equipment is constructed, the injection and recovery of the leaching liquid are realized, necessary channels and operation spaces are provided for the soil leaching work, and the continuity of the entire leaching process is ensured. The inclined connecting pipeline 3 optimizes the flow path of the leaching liquid, reduces the consumption of additional power, and improves the work efficiency.

[0031] Please refer to Figures 1-3 :

[0032] The top of the injection well 1 is symmetrically provided with an electric push rod 6, the lower end of the telescopic rod of the electric push rod 6 penetrates the top of the injection well 1 and is fixedly connected to the top of the leaching tray 4, the top center of the leaching tray 4 is provided with a water injection pipe 5 for inputting the leaching liquid through the pump body, the water injection pipe 5 is slidingly inserted into the top of the injection well 1, and the outer wall of the leaching tray 4 is provided with an annular scraping ring 8, and the outer wall of the scraping ring 8 and the inner wall of the injection well 1 are arranged in a small gap. The cross section of the scraping ring 8 is designed in a wedge shape.

[0033] The telescopic rod of the electric push rod 6 symmetrically installed at the top of the injection well 1 can drive the leaching tray 4 to move up and down. The water injection pipe 5 at the top center of the leaching tray 4 is used for inputting the leaching liquid and can slide at the top of the injection well 1. The annular scraping ring 8 on the outer wall of the leaching tray 4 is in small gap cooperation with the inner wall of the injection well 1, and the wedge-shaped cross section design of the scraping ring 8 can effectively scrape off the soil and pollutants attached to the inner wall of the injection well 1 when the leaching tray 4 moves up and down.

[0034] Such a design solves the problem that the existing equipment lacks a self-cleaning function. After the use of the device is completed, the injection well 1 is hoisted, the scraping ring 8 is automatically cleaned by the electric push rod 6 to scrape off the attached soil and pollutants on the inner wall of the injection well 1, and then the soil and pollutants are pushed out through the lower end of the injection well 1, thereby avoiding the disadvantages of consuming a large amount of time and labor for manual cleaning, preventing residual pollutants from interfering with subsequent leaching work, and ensuring the cleanliness of the device and the stability of the leaching effect.

[0035] Please refer to Figures 2-3 :

[0036] The liquid injection pipes 7 are distributed in multiple circles with the bottom center of the leaching tray 4 as the center, a plurality of groups of main water pipes in the multiple circles are arranged in different lengths to form a layered design, so that the depths of the liquid injection pipes 7 in different layers in the soil are different.

[0037] The injection pipe 7 is distributed in multiple circles with the center of the bottom of the leaching tray 4 as the center, and the main water pipes in the multiple circles are of different lengths, forming a layered design. During the injection of the leaching liquid into the soil, the injection pipe 7 connected by the main water pipes of different lengths can reach different depths of the soil, realizing the leaching of the soil layers at different depths.

[0038] Such a design improves the pertinence and comprehensiveness of the leaching. The pollution degree and pollution type of the soil at different depths may be different, and the layered injection design enables the leaching liquid to accurately act on the soil at each depth, effectively improving the leaching efficiency and repair effect of the soil with light and moderate pollution.

[0039] Please refer to Figure 1 and Figure 4 :

[0040] The inner wall of the water pumping well 2 is provided with a support ring 10, and the support ring 10 is placed with a filter screen plate 11 for filtering soil and impurities in the waste liquid. The center position of the filter screen plate 11 is provided with a sleeve ring 14, and the sleeve ring 14 is sleeved outside the water pumping pipe 9. The outer wall of the sleeve ring 14 is provided with a support 13, and the support 13 is connected to the inner wall of the frame of the filter screen plate 11. The frame of the filter screen plate 11 is provided with a surrounding edge 12, the height of the surrounding edge 12 is 5-10 cm, and the inner wall of the surrounding edge 12 is provided with an angle of 10-15 degrees in the vertical direction.

[0041] The support ring 10 of the inner wall of the water pumping well 2 is used for placing the filter screen plate 11, the sleeve ring 14 at the center of the filter screen plate 11 is sleeved outside the water pumping pipe 9, and the support 13 is connected to the inner wall of the frame of the filter screen plate 11, so that it is fixed around the water pumping pipe 9. The surrounding edge 12 with a certain height and inclination angle is arranged on the frame of the filter screen plate 11. When the water pumping pipe 9 pumps the leaching liquid, the filter screen plate 11 can filter the soil and impurities in the waste liquid, and the surrounding edge 12 can prevent larger impurities from directly sliding from the edge of the filter screen plate 11 to the water pumping pipe 9, so as to ensure that only the filtered leaching liquid is pumped away.

[0042] Such a design can filter the leaching liquid pumped out of the water pumping well 2, effectively removing the soil and impurities therein, avoiding the entry of these impurities into the subsequent treatment system, protecting the related equipment from being damaged, and improving the purity of the leaching liquid, which is conducive to the subsequent treatment and recycling of the leaching liquid, and improves the working quality and resource utilization rate of the entire soil in-situ leaching equipment.

[0043] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and those skilled in the art can change, modify, replace and transform the above embodiments within the scope of the utility model.

Claims

1. A self-cleaning light to medium contaminated soil in-situ leaching apparatus, characterized in that, The utility model relates to a soil washing device, including: Main body structure; The main body structure includes injection well (1) and pumping well (2), and the injection well (1) and pumping well (2) are communicated by connecting pipeline (3), the inside of injection well (1) is provided with leaching tray (4), and the bottom of leaching tray (4) is distributed with multiple groups of injection liquid pipe (7) for injecting leaching liquid to soil; The top of injection well (1) is symmetrically installed with electric push rod (6), and the lower end of the telescopic rod of electric push rod (6) penetrates the top of injection well (1) and is fixedly connected to the top of leaching tray (4), the top center of leaching tray (4) is provided with injection pipe (5) for inputting leaching liquid by pump body, injection pipe (5) is slidingly inserted into the top of injection well (1), and the outer wall of leaching tray (4) is provided with annular scraping ring (8), and the outer wall of scraping ring (8) and the inner wall of injection well (1) are arranged in small gap cooperation.

2. The self-cleaning type of light to medium contaminated soil in-situ leaching equipment according to claim 1, characterized in that: The injection liquid pipe (7) is distributed with multiple circles with the bottom center of leaching tray (4) as the center, and multiple groups of main water pipes in multiple circles are arranged in different lengths to form a layered design, so that the depths of injection liquid pipes (7) in different layers in soil are different.

3. The self-cleaning type of light to medium contaminated soil in-situ leaching equipment according to claim 1, characterized in that: The connecting pipeline (3) is inclinedly arranged, one end of the connecting pipeline (3) is communicated with the injection well (1), and the other end of the connecting pipeline (3) is communicated with the pumping well (2).

4. The self-cleaning type of light to medium contaminated soil in-situ leaching equipment according to claim 1, characterized in that: The cross section of the scraping ring (8) is designed in a wedge shape.

5. The self-cleaning type of light to medium contaminated soil in-situ leaching equipment according to claim 1, characterized in that: The pumping well (2) is provided with a pumping pipe (9) for pumping out the leaching liquid discharged from the injection well (1) by the pump body, and the lower end of the pumping pipe (9) is located at the inner bottom of the pumping well (2).

6. The self-cleaning type of light to medium contaminated soil in-situ leaching equipment according to claim 5, characterized in that: The inner wall of the pumping well (2) is provided with a support ring (10), and a filter screen plate (11) for filtering soil and impurities in waste liquid is placed on the support ring (10), a sleeve ring (14) is arranged at the center position of the filter screen plate (11), and the sleeve ring (14) is sleeved on the outside of the pumping pipe (9).

7. The self-cleaning type of light to medium contaminated soil in-situ leaching equipment according to claim 6, characterized in that: The outer wall of the sleeve ring (14) is provided with a support (13) connected to the inner wall of the frame of the filter screen plate (11).

8. The self-cleaning type of light to medium contaminated soil in-situ leaching equipment according to claim 6, characterized in that: The frame of the filter screen plate (11) is provided with a surrounding edge (12), the height of the surrounding edge (12) is 5-10cm, and the included angle of the inner wall of the surrounding edge (12) in the vertical direction is 10-15 degrees.

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