Lead cadmium soil extraction purification equipment

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By designing a lifting mechanism and a pushing structure, and using a filter screen and an air pump, the problem of the spraying agent's difficulty in penetrating the soil was solved, achieving efficient purification of lead-cadmium soil and rapid separation of the spraying liquid, thus improving the equipment's purification efficiency and reducing costs.

CN224359139UActive Publication Date: 2026-06-16JIANGSU HUASHUBIAO TESTING & CERTIFICATION TECH CO LTD

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2025-06-09
Publication Date: 2026-06-16

AI Technical Summary

Technical Problem

When treating lead-cadmium contaminated soil, existing soil extraction and purification equipment suffers from difficulties in penetrating the soil with the spraying agent, resulting in multiple rinsing processes, which reduces extraction and purification efficiency and increases costs.

Method used

Employing a lifting mechanism and a pushing structure, combined with a filter screen, adjusting gears, adjusting racks, and an air pump, the soil is lifted layer by layer through the lifting plate and pushed out of the purification box. The negative pressure separation of the leaching liquid achieves efficient penetration and rapid separation of the spraying agent.

Benefits of technology

It improves soil purification efficiency, reduces the need for multiple rinsing processes, lowers costs, and increases the separation efficiency of the spray solution.

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Abstract

The utility model discloses a kind of lead cadmium soil extraction purification equipment, relate to soil remediation technical field.This kind of lead cadmium soil extraction purification equipment, including: box;Purification tank, fixedly set in the inside of box, for placing soil;Lifting plate, slidingly set in the inside of purification tank, the lifting plate is set as when moving upwards, soil is pushed out of purification tank;Lifting structure, set in the inside of purification tank, for controlling lifting plate position.This kind of lead cadmium soil extraction purification equipment, by the setting of lifting mechanism and push material structure, when carrying out soil purification, spraying agent is sprayed on the surface of stacked soil, after surface soil is soaked, lifting mechanism lifts lifting plate, so that soaked soil is separated from purification tank, after push material structure pushes soil away from purification tank and is used again after reset spraying agent to lower layer soil, so that spraying agent is more easily penetrated soil, provide very high extraction purification efficiency and avoid multiple leaching.

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Description

Technical Field

[0001] This utility model relates to the field of soil remediation technology, specifically to a lead-cadmium soil extraction and purification device. Background Technology

[0002] Lead-cadmium soil refers to soil contaminated with heavy metals such as lead and cadmium. Both lead and cadmium are biotoxic heavy metals that are highly stable and difficult to degrade in soil, posing a serious threat to the ecological environment and human health. In order to reduce the harm of lead-cadmium soil to the human body, extraction and purification equipment is usually used to extract the lead and cadmium elements from the soil.

[0003] Currently, most soil extraction and purification equipment uses a spraying method for extraction and purification. This method involves spraying a spraying agent onto piled soil, allowing it to penetrate downwards through the contaminated soil and interact with the pollutants. Through physical and chemical processes such as desorption, chelation, dissolution, or complexation of the leachate, the pollutants are ultimately transferred into the leachate. The liquid containing the pollutants is then extracted from the soil medium for separation and wastewater treatment.

[0004] However, the piled soil is prone to internal compaction and clumping, making it difficult for the spraying agent to reach the soil interior. This requires the soil to be washed multiple times, which reduces the efficiency of extraction and purification and increases the washing cost. Utility Model Content

[0005] The purpose of this invention is to provide a lead-cadmium soil extraction and purification device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lead-cadmium soil extraction and purification device, comprising: a housing; a purification box, fixedly installed inside the housing for holding soil; a lifting plate, slidably installed inside the purification box, wherein when the lifting plate is moved upward, the soil is pushed out of the purification box; a lifting structure, installed inside the purification box for controlling the position of the lifting plate; a pushing structure, installed at the top of the purification box for pushing material; a chemical storage box, fixedly installed at the top of the housing for storing and conveying spraying agent; and a water distribution pipe, fixedly installed inside the housing, located directly above the purification box, and connected to the chemical storage box.

[0007] Preferably, it further includes: a liquid distribution tank, fixedly installed inside the tank body, the liquid distribution tank being attached to one side of the purification tank; a filter screen plate, rotatably installed at the top of the liquid distribution tank, the filter screen plate being used to hold soil moistened by the spray liquid; an adjusting gear, fixedly installed at the shaft end of the filter screen plate; a cylinder, fixedly installed on the side of the tank body; an adjusting rack, fixedly installed at the extension end of the cylinder, the outer surface of the adjusting rack meshing with the surface of the adjusting gear; the adjusting rack is configured such that when it is moved, the adjusting gear rotates accordingly, so that the filter screen plate flips.

[0008] Preferably, it further includes: a plurality of positioning frames, fixedly disposed on the side of the box, wherein the outer surface of the adjusting rack is slidably disposed with respect to the inside of the positioning frames; and an air pump, fixedly disposed on the side of the box, wherein the input end of the air pump is connected to the inside of the separating tank.

[0009] Preferably, the lifting structure includes: a bidirectional lead screw rotatably disposed inside the purification chamber; two driven plates threaded onto the bidirectional lead screw, wherein when the bidirectional lead screw is rotated, the driven plates move along the axial direction of the bidirectional lead screw; a plurality of lifting connecting rods rotatably disposed on the driven plates, the other end of the lifting connecting rods being rotatably disposed with the bottom end of the lifting plate; and a first drive motor fixedly disposed on the side of the chamber, the output end of the first drive motor being drively connected to one end of the bidirectional lead screw.

[0010] Preferably, the pushing structure includes: two mounting plates symmetrically arranged on the purification box; an adjusting screw rotatably mounted on the mounting plates; a pushing plate disposed between the two mounting plates, the inside of the pushing plate being threadedly connected to the outer surface of the adjusting screw, and the pushing plate moving axially along the adjusting screw; and a second drive motor fixedly mounted on the mounting plates, the output end of the second drive motor being drively connected to one end of the adjusting screw.

[0011] Preferably, it further includes: a feeding hopper, fixedly disposed on one side of the box body, the discharge port of the feeding hopper extending to the top of the purification box; two crushing rollers, rotatably disposed inside the feeding hopper, the two crushing rollers meshing with each other; a third drive motor, fixedly disposed on the feeding hopper, the output end of the third drive motor being connected to one of the crushing rollers; and two transmission gears, fixedly disposed on the same end of the crushing rollers, the two transmission gears meshing with each other.

[0012] Preferably, it further includes: a collection box, which is inserted into the box body, with one side of the collection box attached to one side of the dispensing box.

[0013] This utility model provides a lead-cadmium soil extraction and purification device, which has the following beneficial effects:

[0014] (1) By setting up a lifting mechanism and a pushing structure, the present invention sprays the spraying agent on the surface of the stacked soil during soil purification. After the surface soil is soaked, the lifting mechanism lifts the lifting plate so that the soaked soil is removed from the purification box. Then the pushing structure pushes the soil away from the purification box and sprays the spraying agent on the lower soil again after resetting. This makes it easier for the spraying agent to penetrate the soil, providing a high extraction and purification efficiency and avoiding multiple rinsing.

[0015] (2) This utility model uses a filter screen, adjusting gear, adjusting rack and air pump to separate and filter the soil pushed by the pushing structure on the filter screen. The air pump creates a negative pressure inside the liquid separation tank, which allows the leachate in the soil to be quickly separated from the soil under the action of negative pressure. Then, the filtered soil is turned into the collection box for collection by the cooperation of the adjusting rack and adjusting gear, which greatly improves the separation efficiency of the spray liquid in the soil. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the box in this utility model;

[0018] Figure 3 This is an exploded view of the internal structure of the purification box in this practical application;

[0019] Figure 4 This is an exploded view of the separatory tank structure in this practical application.

[0020] In the diagram: 1. Box body; 2. Purification box; 3. Lifting plate; 4. Two-way lead screw; 5. Driven plate; 6. Lifting connecting rod; 7. First drive motor; 8. Mounting plate; 9. Adjusting lead screw; 10. Second drive motor; 11. Pushing plate; 12. Medicine storage tank; 13. Water distribution pipe; 14. Liquid distribution tank; 15. Filter screen; 16. Adjusting gear; 17. Adjusting rack; 18. Cylinder; 19. Air pump; 20. Positioning frame; 21. Feeding hopper; 22. Crushing roller; 23. Third drive motor; 24. Transmission gear; 25. Collection box. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] This utility model provides a technical solution: Referring to 1-4, in this embodiment, a lead-cadmium soil extraction and purification device includes: a housing 1; a purification box 2, fixedly disposed inside the housing 1 for holding soil; a lifting plate 3, slidably disposed inside the purification box 2, wherein when the lifting plate 3 is moved upward, the soil is pushed out of the purification box 2; a lifting structure, disposed inside the purification box 2 for controlling the position of the lifting plate 3; a pushing structure, disposed at the top of the purification box 2 for pushing material; and a storage tank 12, fixedly disposed in the housing. 1. The top is used for storing and transporting the spraying agent; the water distribution pipe 13 is fixedly installed inside the box 1 and is located directly above the purification box 2. The water distribution pipe 13 is connected to the storage tank 12. The lifting plate 3 can be set to control the height of the soil under the action of the lifting structure, making it easier for the soil to be pushed out of the purification box 2 by the push plate 11. The storage tank 12 is used to store the spraying agent and is equipped with a water pump inside. By setting the water distribution pipe 13, the spraying agent can be evenly sprayed on the soil.

[0023] It also includes: a liquid separator 14, fixedly installed inside the housing 1, with the liquid separator 14 attached to one side of the purification tank 2; a filter screen 15, rotatably installed at the top of the liquid separator 14, used to hold soil moistened by the spray liquid; an adjusting gear 16, fixedly installed at the shaft end of the filter screen 15; a cylinder 18, fixedly installed on the side of the housing 1; and an adjusting rack 17, fixedly installed at the extension end of the cylinder 18, with the outer surface of the adjusting rack 17 meshing with the surface of the adjusting gear 16. When the adjusting rack 17 is moved, the adjusting gear 16 rotates accordingly, causing the filter screen 15 to flip. By setting the filter screen 15, the spray liquid in the soil can be separated. By setting the cylinder 18, the adjusting rack 17 can be moved, allowing the filter screen 15 to flip for easy material discharge.

[0024] It also includes: several positioning frames 20, fixedly set on the side of the box body 1, with the outer surface of the adjusting rack 17 slidingly set inside the positioning frame 20; and an air pump 19, fixedly set on the side of the box body 1, with the input end of the air pump 19 connected to the inside of the liquid distribution tank 14. The positioning frames 20 limit the adjustment rack 17 to ensure the meshing force between it and the adjusting gear 16 and prevent dislodging. The air pump 19 draws air from the inside of the liquid distribution tank 14, creating a negative pressure inside the liquid distribution tank 14, which allows the spraying agent to quickly separate from the soil.

[0025] The lifting structure includes: a bidirectional lead screw 4, rotatably mounted inside the purification chamber 2; two driven plates 5 threaded onto the bidirectional lead screw 4, wherein when the bidirectional lead screw 4 is rotated, the driven plates 5 move axially along the bidirectional lead screw 4; several lifting connecting rods 6, rotatably mounted on the driven plates 5, with the other end of the lifting connecting rods 6 rotatably mounted to the bottom end of the lifting plate 3; and a first drive motor 7, fixedly mounted on the side of the chamber 1, with the output end of the first drive motor 7 being drively connected to one end of the bidirectional lead screw 4.

[0026] The material pushing structure includes: two mounting plates 8, symmetrically arranged on the purification box 2; an adjusting screw 9, rotatably mounted on the mounting plates 8; a pushing plate 11, disposed between the two mounting plates 8, with the inside of the pushing plate 11 threadedly connected to the outer surface of the adjusting screw 9, and the pushing plate 11 moving axially along the adjusting screw 9; and a second drive motor 10, fixedly mounted on the mounting plates 8, with the output end of the second drive motor 10 being drively connected to one end of the adjusting screw 9.

[0027] It also includes: a feeding hopper 21, which is fixedly installed on one side of the housing 1, with the discharge port of the feeding hopper 21 extending to the top of the purification tank 2; two crushing rollers 22, which are rotatably installed inside the feeding hopper 21 and mesh with each other; a third drive motor 23, which is fixedly installed on the feeding hopper 21 and whose output end is connected to one of the crushing rollers 22; and two transmission gears 24, which are fixedly installed on the same end of the crushing rollers 22 and mesh with each other.

[0028] It also includes: a collection box 25, which is inserted into the box body 1, with one side of the collection box 25 attached to one side of the dispensing box 14.

[0029] This utility model provides a lead-cadmium soil extraction and purification device, the specific working principle of which is as follows:

[0030] During soil purification, workers pour the soil to be purified into the feeding hopper 21 and start the third drive motor 23. The third drive motor 23 drives the crushing roller 22 to rotate, breaking up the clumps in the soil and making it loose. The loosened soil falls into the purification tank 2 under gravity. After the purification tank 2 is full, the storage tank 12 delivers the spraying liquid to the water distribution pipe 13. The spraying liquid falls onto the soil under gravity. After the spraying liquid has soaked the surface soil, the first drive motor 7 drives the bidirectional lead screw 4 to rotate. Driven by the bidirectional lead screw 4, the driven plate 5 moves and the lifting connecting rod 6 rotates, thereby lifting the lifting plate 3. The lifting plate 3 raises the soil, and after the soaked soil is completely lifted out of the purification box 2, the second drive motor 10 is started. The adjusting screw 9 rotates under its drive and pushes the pusher plate 11 to move along the axis of the adjusting screw 9. During the movement, the pusher plate 11 pushes the soil soaked by the spraying agent onto the filter screen plate 15. The soil is separated and filtered on the filter screen plate 15. The vacuum pump 19 is started, so that a negative pressure is formed inside the liquid separation box 14, so that the leachate in the soil can be quickly separated from the soil under the action of negative pressure. Then, the filtered soil is turned into the collection box 25 for collection by adjusting the gear rack 17 and the adjusting gear 16.

[0031] 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 lead-cadmium soil extraction and purification device, characterized in that: include: Box (1); Purification box (2), fixedly installed inside the box (1), used to hold soil; A lifting plate (3) is slidably disposed inside the purification box (2). When the lifting plate (3) is moved upward, the soil is pushed out of the purification box (2). A lifting structure is disposed inside the purification box (2) to control the position of the lifting plate (3). A pushing structure is disposed at the top of the purification box (2) to push the material. A medicine storage box (12) is fixedly disposed at the top of the box body (1) to store and transport the spraying agent. A water distribution pipe (13) is fixedly disposed inside the box body (1). The water distribution pipe (13) is located directly above the purification box (2) and is connected to the medicine storage box (12).

2. The lead-cadmium soil extraction and purification equipment according to claim 1, characterized in that: Also includes: The liquid separator (14) is fixedly installed inside the box body (1), and the liquid separator (14) is attached to one side of the purification box (2); the filter screen (15) is rotatably installed at the top of the liquid separator (14), and the filter screen (15) is used to pile up the soil moistened by the spray liquid; the adjusting gear (16) is fixedly installed at the shaft end of the filter screen (15); the cylinder (18) is fixedly installed on the side of the box body (1); the adjusting rack (17) is fixedly installed at the extension end of the cylinder (18), and the outer surface of the adjusting rack (17) meshes with the surface of the adjusting gear (16); when the adjusting rack (17) is moved, the adjusting gear (16) rotates accordingly, so that the filter screen (15) is flipped.

3. The lead-cadmium soil extraction and purification equipment according to claim 2, characterized in that: Also includes: Several positioning frames (20) are fixedly set on the side of the box body (1), and the outer surface of the adjusting rack (17) is slidably set with the inside of the positioning frame (20); the air pump (19) is fixedly set on the side of the box body (1), and the input end of the air pump (19) is connected to the inside of the liquid separator (14).

4. The lead-cadmium soil extraction and purification equipment according to claim 1, characterized in that: The lifting structure includes: a bidirectional lead screw (4), which is rotatably disposed inside the purification box (2); two driven plates (5) are threaded onto the bidirectional lead screw (4), and the driven plates (5) move axially along the bidirectional lead screw (4) when the bidirectional lead screw (4) is rotated; a plurality of lifting connecting rods (6), which are rotatably disposed on the driven plates (5), and the other end of the lifting connecting rods (6) is rotatably disposed with the bottom end of the lifting plate (3); a first drive motor (7), which is fixedly disposed on the side of the box body (1), and the output end of the first drive motor (7) is connected to one end of the bidirectional lead screw (4) for transmission.

5. The lead-cadmium soil extraction and purification equipment according to claim 1, characterized in that: The material pushing structure includes: two mounting plates (8) symmetrically arranged on the purification box (2); an adjusting screw (9) rotatably arranged on the mounting plate (8); a pushing plate (11) arranged between the two mounting plates (8), the inside of the pushing plate (11) being threadedly connected to the outer surface of the adjusting screw (9), and the pushing plate (11) moving axially along the adjusting screw (9); and a second drive motor (10) fixedly arranged on the mounting plate (8), the output end of the second drive motor (10) being connected to one end of the adjusting screw (9).

6. The lead-cadmium soil extraction and purification equipment according to claim 1, characterized in that: Also includes: A feeding hopper (21) is fixedly installed on one side of the box body (1), and the discharge port of the feeding hopper (21) extends to the top of the purification box (2); two crushing rollers (22) are rotatably installed inside the feeding hopper (21), and the two crushing rollers (22) mesh with each other; a third drive motor (23) is fixedly installed on the feeding hopper (21), and the output end of the third drive motor (23) is connected to one of the crushing rollers (22); two transmission gears (24) are fixedly installed at the same end of the crushing rollers (22), and the two transmission gears (24) mesh with each other.

7. The lead-cadmium soil extraction and purification equipment according to claim 1, characterized in that: Also includes: The collection box (25) is inserted into the box body (1), and one side of the collection box (25) is attached to one side of the liquid separator (14).