Heavy metal contaminated soil leaching equipment capable of recycling leacheate

Abstract

The utility model discloses heavy metal contaminated soil leaching equipment capable of recycling leacheate, which belongs to the technical field of soil remediation and comprises a leaching box, a discharge port is arranged at the bottom of one side of the leaching box, a top cover is fixedly mounted at the top of the leaching box, and a feed port is arranged on one side of the top cover; the device further comprises a leaching assembly, the leaching assembly comprises a first spraying pipe, the first spraying pipe communicates with the output end of a first water pump through a first solution pipe, and a water inlet pipe of the first water pump communicates to the bottom of the solution box; the device further comprises a circulation assembly. By arranging the circulating assembly, the device is simple in structure, convenient and practical, used leacheate can be precipitated and collected, the leacheate can be reused conveniently, the utilization rate of the leacheate is increased, the use amount is reduced, compared with the prior art, less waste water is generated, the use cost is reduced, and the device is suitable for popularization and application. And after the treatment is completed, the wastewater can be intensively collected into the settling tank, so that the centralized treatment by operators is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of soil remediation technology, specifically to a heavy metal contaminated soil leaching equipment that recycles leaching solution. Background Technology

[0002] Heavy metal contaminated soil refers to the phenomenon where heavy metals such as mercury, cadmium, lead, and chromium enter the soil due to human activities, such as the discharge of wastewater, waste gas, and waste residue from industrial activities, the use of pesticides and fertilizers in agricultural activities, and the emission of traffic exhaust, exceeding the soil's self-purification capacity and accumulating in large quantities. This not only alters the soil's physicochemical properties, inhibits soil microbial activity, and disrupts the soil's ecological balance, but it can also be absorbed by crops, affecting crop growth and quality, and harming human health through the food chain, causing various diseases. Soil leaching is an important method for remediating heavy metal contaminated soil. It mainly relies on the leaching agent to undergo a series of physicochemical reactions with the heavy metals in the soil, such as dissolution, complexation, and ion exchange, transferring heavy metal ions from the surface of soil particles and pores to the leaching solution. Then, the leaching solution containing heavy metals is extracted from the soil using leaching equipment, and further treatment is carried out on the leaching solution.

[0003] A search revealed that Chinese Patent Publication No. CN222198289U discloses a soil leaching device, comprising a treatment box, a hopper mounted on the upper end of the treatment box, a mounting bracket fixedly connected to the inner side of the treatment box, a filter screen mounted on the upper end of the mounting bracket, a pushing mechanism mounted on one side of the treatment box, a locking tooth on one side of the treatment box, a receiving box slidably connected to the inner side of the treatment box, a push plate mounted on the inner side of the treatment box, a waste box mounted on the outer side of the treatment box, a first opening on one side of the treatment box, and a second opening below the first opening on one side of the treatment box. The device has a simple overall structure, is very easy to operate, greatly saves manpower, and is convenient for subsequent maintenance.

[0004] However, this device also has the following drawbacks:

[0005] Existing technologies for soil leaching typically require the use of excessive amounts of leaching solution, resulting in high treatment costs. Furthermore, the large amounts of wastewater generated further increase these costs, and this device does not address this issue. Utility Model Content

[0006] The purpose of this invention is to provide a heavy metal contaminated soil leaching equipment that recycles leaching solution. By setting up a circulation component, the leaching solution can be reused, improving the utilization rate of the leaching solution and thus reducing the amount used. Compared with the prior art, it produces less wastewater and reduces the cost of use, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A heavy metal contaminated soil leaching equipment that recycles leaching solution includes a leaching tank, a discharge port at the bottom of one side of the leaching tank, a top cover fixedly installed on the top of the leaching tank, and a feeding port on one side of the top cover.

[0009] It also includes a rinsing assembly, which includes a first spray pipe connected to the output end of a first water pump via a first solution pipe, and the inlet pipe of the first water pump connected to the bottom of the solution tank.

[0010] It also includes a circulation component, which includes a sedimentation tank and a second spray pipe. One side of the sedimentation tank is connected to the bottom of the water inlet channel via a connecting pipe. The second spray pipe is connected to the output end of the second water pump via a second solution pipe. The second spray pipe and the first spray pipe are fixedly installed at the bottom of the top cover. The inlet pipe of the second water pump is connected to the inside of the sedimentation tank.

[0011] Preferably, a discharge auger is rotatably installed at the bottom of the washing tank, one end of which is connected to the output end of a motor, and the motor is fixedly installed on the other side of the outer wall of the washing tank.

[0012] Preferably, a water outlet trough is provided below the discharge auger, the water outlet trough is located at the bottom of the washing tank, and a metal filter plate is fixedly installed inside the water outlet trough.

[0013] Preferably, the water receiving channel is located below the metal filter plate and is fixedly installed at the bottom of the rinsing tank.

[0014] Preferably, the sedimentation tank includes a sedimentation chamber and a clear liquid chamber, which are separated by a partition plate, and an overflow hole is provided above the partition plate.

[0015] Preferably, the upper side of the sedimentation chamber is connected to a connecting pipe, and the top side of the clear liquid chamber is fixedly connected to the second water pump via a mounting plate, with the inlet pipe of the second water pump connected to the clear liquid chamber.

[0016] Preferably, the sedimentation tank is located on one side of the rinsing tank, and the solution tank is fixedly connected to one side of the sedimentation tank.

[0017] Preferably, the first water pump is fixedly installed on one side of the top of the solution tank, and a filling port is installed on the other side of the top of the solution tank.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This utility model features a simple and convenient structure with a circulation component. It allows for the sedimentation and collection of the used rinsing solution, facilitating its reuse and improving its utilization rate. This reduces the amount of rinsing solution used, generates less wastewater compared to existing technologies, and lowers operating costs. Furthermore, the wastewater can be collected in a sedimentation tank after treatment, making it convenient for operators to handle centrally. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the bottom structure of the rinsing tank;

[0022] Figure 3 This is a schematic diagram of the top cover structure;

[0023] Figure 4 This is a schematic diagram of the internal structure of the shower tank.

[0024] In the diagram: 1. Washing tank; 2. Discharge port; 3. Top cover; 4. Feed port; 5. First spray pipe; 6. First solution pipe; 7. First water pump; 8. Sedimentation tank; 9. Second spray pipe; 10. Connecting pipe; 11. Water inlet channel; 12. Second solution pipe; 13. Second water pump; 14. Discharge auger; 15. Motor; 16. Water outlet tank; 17. Metal filter plate; 18. Sedimentation chamber; 19. Clear liquid chamber; 20. Divider plate; 21. Overflow hole; 22. Mounting plate; 23. Filling port; 24. Solution tank. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-4 This utility model provides a technical solution:

[0027] A heavy metal contaminated soil leaching equipment that recycles leaching solution includes a leaching tank 1, a discharge port 2 at the bottom of one side of the leaching tank 1, a top cover 3 fixedly installed on the top of the leaching tank 1, a feeding port 4 on one side of the top cover 3, and a discharge auger 14 rotatably installed at the bottom of the leaching tank 1. One end of the discharge auger 14 is connected to the output end of a motor 15, and the motor 15 is fixedly installed on the outer wall of the other side of the leaching tank 1.

[0028] By setting the top cover 3, the rinsing liquid is prevented from splashing out of the rinsing tank 1 during the rinsing operation. The feeding port 4 facilitates the feeding of materials into the rinsing tank 1. The discharge auger 14 and discharge port 2 facilitate the discharge of materials.

[0029] It also includes a rinsing assembly, which includes a first spray pipe 5. The first spray pipe 5 is connected to the output end of the first water pump 7 through a first solution pipe 6. The inlet pipe of the first water pump 7 is connected to the bottom of the solution tank 24. The first water pump 7 is fixedly installed on one side of the top of the solution tank 24. A filling port 23 is installed on the other side of the top of the solution tank 24.

[0030] By setting the first water pump 7, the leaching solution inside the solution tank 24 can be extracted and pumped into the first spray pipe 5 through the first solution pipe 6, thereby leaching the soil inside the leaching tank 1. The leaching agent will undergo a series of physicochemical reactions with the heavy metals in the soil, transferring the heavy metal ions on the surface and pores of the soil particles to the leaching solution.

[0031] A water outlet trough 16 is provided below the discharge auger 14. The water outlet trough 16 is located at the bottom of the washing tank 1. A metal filter plate 17 is fixedly installed inside the water outlet trough 16. A water receiving channel 11 is located below the metal filter plate 17 and is fixedly installed at the bottom of the washing tank 1.

[0032] By setting up the water outlet 16, the leachate inside the leachate tank 1 flows downward under the influence of gravity and flows out from the water outlet 16. At the same time, the metal filter plate 17 filters the leachate, reducing the amount of soil flowing out with the leachate.

[0033] It also includes a circulation component, which includes a sedimentation tank 8 and a second spray pipe 9. One side of the sedimentation tank 8 is connected to the bottom of the water inlet channel 11 via a connecting pipe 10. The second spray pipe 9 is connected to the output end of the second water pump 13 via a second solution pipe 12. The second spray pipe 9 and the first spray pipe 5 are fixedly installed at the bottom of the top cover 3. The inlet pipe of the second water pump 13 is connected to the inside of the sedimentation tank 8. The sedimentation tank 8 includes a sedimentation chamber 18 and a clear liquid chamber 19. The sedimentation chamber 18 and the clear liquid chamber 19 are separated by a partition plate 20. An overflow hole 21 is provided above the partition plate 20. The top of one side of the sedimentation chamber 18 is connected to a connecting pipe. The top side of the clear liquid chamber 19 is fixedly connected to the second water pump 13 via a mounting plate 22. The inlet pipe of the second water pump 13 is connected to the clear liquid chamber 19. The sedimentation tank 8 is located on one side of the rinsing tank 1. The solution tank 24 is fixedly connected to one side of the sedimentation tank 8.

[0034] By setting up the water inlet channel 11 and the connecting pipe 10, the leachate flowing out of the rinsing tank 1 can be directed into the sedimentation chamber 18. After sedimentation, the supernatant in the sedimentation chamber 18 will enter the clear liquid chamber 19 through the overflow hole 21. By setting up the second water pump 13, the leachate inside the clear liquid chamber 19 can be extracted and sprayed back into the rinsing tank 1 through the second solution pipe 12 and the second spray pipe 9 to react with the soil, thereby improving the utilization rate of the leachate, reducing the amount of leachate used, and after the treatment is completed, the wastewater can be collected in the sedimentation tank 8 for convenient centralized treatment by the operators.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heavy metal contaminated soil leaching apparatus for recycling leachate, characterized by: Including the elution tank (1), the bottom of one side of the elution tank (1) is provided with a discharge port (2), the top of the elution tank (1) is fixedly installed with a top cover (3), one side of the top cover (3) is provided with a feeding port (4); It also includes a washing assembly, the washing assembly includes a first spray pipe (5), the first spray pipe (5) is communicated with the output end of the first water pump (7) through the first solution pipe (6), the water inlet pipe of the first water pump (7) is communicated to the bottom of the solution tank (24); It also includes a circulating assembly, the circulating assembly includes a sedimentation tank (8) and a second spray pipe (9), one side of the sedimentation tank (8) is communicated with one side bottom of the water receiving channel (11) through the connecting pipe (10), the second spray pipe (9) is communicated with the output end of the second water pump (13) through the second solution pipe (12), the second spray pipe (9) and the first spray pipe (5) are fixedly installed on the bottom of the top cover (3), the water inlet pipe of the second water pump (13) is communicated to the inside of the sedimentation tank (8).

2. The heavy metal contaminated soil leaching equipment capable of recycling leaching solution according to claim 1, characterized in that: The bottom of the elution tank (1) is rotatably installed with a discharge auger (14), one end of the discharge auger (14) is drivingly connected with the output end of the motor (15), the motor (15) is fixedly installed on the other side outer wall of the elution tank (1).

3. The heavy metal contaminated soil leaching equipment capable of recycling leaching solution according to claim 2, characterized in that: The discharge auger (14) is provided below the water outlet groove (16), the water outlet groove (16) is provided on the bottom of the elution tank (1), and the metal filter plate (17) is fixedly installed in the water outlet groove (16).

4. The heavy metal contaminated soil leaching equipment recycling leaching solution according to claim 1, characterized in that: The water receiving channel (11) is arranged below the metal filter plate (17), and the water receiving channel (11) is fixedly installed on the bottom of the elution tank (1).

5. The heavy metal contaminated soil leaching equipment recycling leaching solution according to claim 1, characterized in that: The sedimentation tank (8) includes a sedimentation chamber (18) and a clear liquid chamber (19), the sedimentation chamber (18) and the clear liquid chamber (19) are separated by a partition plate (20), and a water overflow hole (21) is formed in the upper portion of the partition plate (20).

6. The heavy metal contaminated soil leaching equipment capable of recycling leaching solution according to claim 5, characterized in that: The upper portion of one side of the sedimentation chamber (18) is communicated with the communicating pipe, the top side of the clear liquid chamber (19) is fixedly connected with the second water pump (13) through the mounting plate (22), and the water inlet pipe of the second water pump (13) is communicated into the clear liquid chamber (19).

7. The heavy metal contaminated soil leaching equipment recycling leaching solution according to claim 1, characterized in that: The sedimentation tank (8) is arranged on one side of the elution tank (1), and the solution tank (24) is fixedly connected with one side of the sedimentation tank (8).

8. The heavy metal contaminated soil leaching equipment recycling leaching solution according to claim 1, characterized in that: The first water pump (7) is fixedly installed on the top side of the solution tank (24), and the top of the other side of the solution tank (24) is provided with a filling port (23).

Images