Soil pollution treatment equipment and treatment method

Abstract

The invention relates to the technical field of soil pollution treatment, and discloses soil pollution treatment equipment and a treatment method, the soil pollution treatment equipment comprises: a shell, the top of which is open; the main shaft is driven by a driving source installed on the shell to rotate intermittently, the main shaft is connected with the rotating assembly, and the output end of the rotating assembly is connected with the mesh bag; the extrusion assembly is arranged in the flowing cavity and is connected with the driving source through the transmission assembly; when the main shaft stops rotating, the driving source starts the transmission assembly to drive the extrusion assembly to contract so as to extrude the net bag, that is, soil particles in the net bag stop moving and are gathered and extruded after performing centrifugal motion for a period of time, and the soil particles are separated from the net bag. And the problem that soil particles are difficult to penetrate through meshes due to soil bonding and piling can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soil pollution treatment, in particular to a soil pollution treatment device and method. BACKGROUND

[0002] Contaminated soil refers to soil containing harmful chemical substances, which may come from industrial waste, chemical fertilizers and pesticide residues in agricultural production, municipal solid waste landfill and other sources. Long-term accumulation of these harmful substances in the soil not only affects the growth of crops, but also may affect human health through the food chain. Traditional soil pollution treatment methods include biological remediation, chemical remediation and physical remediation.

[0003] Currently, there are some technologies that can treat contaminated soil through chemical soaking. For example, the technical solution of patent publication No. CN119819700B, which mainly uses the method of placing contaminated soil in a metal mesh bag and soaking it in a leaching agent, and by arranging extrusion plates around the metal mesh bag that can move towards the metal mesh bag, it can make each pair of oppositely arranged extrusion plates cyclically extrude the contaminated soil in the metal mesh bag, realizing multi-directional crushing. After crushing, the soil falls to the bottom of the medicine tank through the mesh holes of the metal mesh bag under the action of gravity after being washed, and the soil is not easy to be crushed, so the impurities such as packaging bags, plastics and stones can be left in the metal mesh bag for subsequent collection.

[0004] However, the technical solution has the following disadvantages: when the soil in the mesh bag is washed and crushed, only the gravity of the soil itself is used to make it pass through the mesh holes of the mesh bag, and the soil is soaked in the medicine, which is easy to stick together, so the soil particles are difficult to pass through the mesh holes and are blocked by impurities in the mesh bag. This not only makes it difficult to discharge and collect the soil particles treated by chemical agents, but also causes the mesh bag to be blocked, making it impossible to treat the contaminated soil again. SUMMARY

[0005] The present application aims to solve the technical problem that the soil treated by chemical agents is too sticky to pass through the mesh holes of the mesh bag.

[0006] The purpose of the present application can be achieved by the following technical solutions: A soil pollution treatment device, comprising: a shell with an open top, a mesh bag rotatably installed inside the shell, a flow cavity between the mesh bag and the shell, and a discharge pipe connected to the bottom of the shell; a main shaft driven by a drive source installed on the shell to rotate intermittently, and the main shaft is connected with a rotating assembly, and the output end of the rotating assembly is connected with the mesh bag; and The extrusion assembly is located inside the flow chamber and is connected to the drive source via a transmission assembly. When the main shaft stops rotating, the drive source activates the transmission assembly to cause the extrusion assembly to contract and extrude the mesh bag.

[0007] As a further aspect of the present invention: the rotating assembly includes: A secondary shaft, connected to the main shaft via a differential module, and connected to a rotating shaft via a belt, the rotating shaft being rotatably mounted on the housing; and The gear is rotatably mounted on the housing and is fixedly connected to the rotating shaft on the same axis. The gear meshes with the gear ring. The top of the mesh bag is open and a mounting ring is fixed at the top edge. The mounting ring is rotatably connected to the housing. The gear ring is sleeved on the outside of the mounting ring and the two are fixedly connected on the same axis.

[0008] As a further aspect of the present invention: the extrusion assembly includes four extrusion plates that are slidably mounted on the four side walls of the flow chamber, and all four extrusion plates are connected to the output end of the transmission assembly. The mesh bag is located between the four extrusion plates, and a corner plate is provided between two adjacent extrusion plates. The corner plate is connected to the extrusion plates by a telescopic plate, and the telescopic plate is a telescopic structure.

[0009] As a further aspect of the present invention: the extrusion plate is connected to the side wall of the housing via an elastic element.

[0010] As a further aspect of the present invention: the transmission assembly includes: A lifting ring, connected to an output source, which in turn is connected to a drive source, which is connected to an encoder. The lifting ring is sleeved around the outside of the main shaft, and the two are coaxially arranged. The sliders are respectively associated with the four extrusion plates. Each slider is hinged to one end of a connecting rod, and the other end of the connecting rod is hinged to the lifting ring. The four connecting rods are arranged in a circle, and the four sliders are slidably installed on four horizontally arranged slide rails. The slide rails are fixedly installed on the housing. The four sliders are fixedly connected to the four extrusion plates through four push rods.

[0011] As a further embodiment of the present invention: a guide rod is fixedly installed on the slide rail, and a limit block is fixed at the end of the guide rod near the main shaft. A limit groove is opened at the end of the slider near the main shaft, and the limit block and the limit groove are slidably engaged.

[0012] As a further aspect of the present invention: a stirring element is mounted on the main shaft, and the two rotate synchronously.

[0013] As a further aspect of the present invention: the stirring component includes a stirring shaft and several partition rods arranged circumferentially and fixed on the stirring shaft. A cross-shaped rod is coaxially fixedly connected to the bottom of the main shaft. A cross-shaped groove is opened through the central axis of the stirring shaft, and the cross-shaped groove engages with the cross-shaped rod.

[0014] As a further embodiment of the present invention: the cross-shaped groove and the cross-shaped rod are slidably engaged; a fixing rod is fixedly installed on the lifting ring; the fixing rod is fixedly connected to a positioning ring sleeved on the outside of the cross-shaped rod; the positioning ring is slidably engaged with an annular groove opened on the stirring shaft; and the annular groove and the stirring shaft are coaxially arranged.

[0015] A method for remediating soil pollution, wherein the method is applied to the soil pollution remediation equipment as described above, the method comprising the following steps: Step S1: Put the contaminated soil into the mesh bag and pour chemical agents into the mesh bag; Step S2: Start the drive source to drive the main shaft to rotate intermittently, then the rotating component drives the mesh bag to rotate, so that the soil inside the mesh bag undergoes centrifugal motion, and the soil particles can pass through the mesh of the mesh bag and enter the flow chamber; Step S3: When the main shaft stops rotating, the drive source starts the transmission assembly to drive the extrusion assembly to contract and extrude the mesh bag; Step S4: After repeating steps S2 to S3 multiple times, open the valve on the discharge pipe to discharge the soil particles in the flow chamber.

[0016] The beneficial effects of this invention are: (1) In this invention, it is possible to clean and screen the contaminated soil in the mesh bag, and impurities can be retained in the mesh bag. When the main shaft stops rotating, the drive source starts the transmission component to drive the extrusion component to shrink and extrude the mesh bag. That is, after the soil particles in the mesh bag undergo centrifugal motion for a period of time, they stop moving and are gathered and extruded, which can effectively prevent the soil from sticking together and causing the soil particles to be difficult to pass through the mesh. (2) In this invention, when the main shaft stops rotating, the drive source starts the transmission assembly. Then the output end of the transmission assembly drives the four extrusion plates to move towards the main shaft. The extrusion assembly is in a contracted state and can extrude the mesh bag so that the soil in the mesh bag can be gathered and extruded, effectively preventing the soil from sticking together. It can realize the alternation of centrifugal motion and extrusion motion to treat the contaminated soil and improve the treatment efficiency of contaminated soil. (3) In this invention, when the main shaft rotates, it drives the mesh bag to rotate through the rotating component. At the same time, the cross-shaped rod can drive the stirring shaft to rotate synchronously through its engagement with the cross-shaped groove. Then, the rotation of several partition rods can divide and disperse the soil pile. When the main shaft stops rotating, the output source drives the lifting ring to rise. Then, the lifting ring drives the positioning ring to rise synchronously through the fixing rod. Due to the engagement of the positioning ring with the ring groove, the stirring shaft rises synchronously. During this process, the cross-shaped rod and the cross-shaped groove slide relative to each other. In this way, the stirring component can rise synchronously to be misaligned with the squeezing component during the process of the squeezing component shrinking to squeeze the mesh bag, so as to avoid the stirring component affecting the squeezing path and causing the squeezing path to be too short and unable to fully squeeze the soil. Attached Figure Description

[0017] The invention will now be further described with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the mesh bag in this invention; Figure 3 This is a schematic diagram of the main shaft in this invention; Figure 4 This is a schematic diagram of the extrusion assembly in its contracted state in this invention; Figure 5 This is a schematic diagram of the transmission component in this invention; Figure 6 In this invention Figure 5 A magnified schematic diagram of the structure at point A; Figure 7 This is a schematic diagram of the structure of the stirring component in this invention; Figure 8 This is a schematic diagram of the slider structure in this invention; Figure 9 This is a schematic diagram of the limiting block in this invention.

[0019] In the diagram: 1. Shell; 2. Mesh bag; 3. Discharge pipe; 4. Main shaft; 5. Rotating assembly; 501. Sub-shaft; 502. Belt; 503. Rotating shaft; 504. Gear; 505. Gear ring; 6. Extrusion assembly; 601. Extrusion plate; 602. Angle plate; 603. Telescopic plate; 604. Elastic element; 7. Transmission assembly; 701. Lifting ring; 702. Output source; 703. Connecting rod; 704. Slider; 705. Push rod; 706. Slide rail; 707. Guide rod; 708. Limiting block; 709. Limiting groove; 8. Agitator; 801. Agitating shaft; 802. Partitioning rod; 9. Fixing rod; 10. Positioning ring; 11. Ring groove; 12. Cross-shaped rod; 13. Cross-shaped groove. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-4 As shown, the present invention is a soil pollution remediation device, comprising: The shell 1 has an open top and a mesh bag 2 is rotatably installed inside it. The mesh bag 2 and the shell 1 form a flow cavity. The bottom of the shell 1 is connected to the discharge pipe 3. The main shaft 4 is driven intermittently by a drive source mounted on the housing 1, and the main shaft 4 is connected to a rotating assembly 5, the output end of which is connected to the mesh bag 2; and The extrusion assembly 6 is located inside the flow chamber and is connected to the drive source via the transmission assembly 7. When the main shaft 4 stops rotating, the drive source activates the transmission assembly 7 to drive the extrusion assembly 6 to contract and extrude the mesh bag 2.

[0022] In one embodiment, the top of the flow cavity is sealed by the housing 1, and its bottom is connected to the discharge pipe 3, which is equipped with a solenoid valve. The drive source can be a motor assembly, a gear assembly driven by a motor, or a pulley assembly, as long as it can make the main shaft 4 rotate. This embodiment does not impose specific limitations. The solenoid valve, drive source, and other electrical components are all connected to an external controller. The aforementioned electrical components and external controller are all prior art, and this application does not improve them. Therefore, it is not necessary to disclose their specific mechanical and circuit structures, and this does not affect the completeness of this application.

[0023] In practical application, contaminated soil is placed into mesh bag 2, and chemical agents are poured into mesh bag 2. Then, the drive source is started to drive the main shaft 4 to rotate intermittently. The rotating component 5 drives the mesh bag 2 to rotate, causing the soil inside the mesh bag 2 to undergo centrifugal motion. Soil particles can pass through the mesh of mesh bag 2 and enter the flow chamber. This can achieve the washing and screening of contaminated soil inside mesh bag 2, and impurities can be retained inside mesh bag 2. When the main shaft 4 stops rotating, the drive source starts the transmission component 7 to drive the extrusion component 6 to contract and extrude the mesh bag 2. That is to say, after a period of centrifugal motion, the soil particles inside mesh bag 2 stop moving and are gathered and extruded, which can effectively prevent the soil from sticking together and causing the soil particles to be difficult to pass through the mesh. After repeating the above steps several times, the opening and closing valve on the discharge pipe 3 can be opened to discharge and collect the treated soil particles in the flow chamber.

[0024] likeFigures 1-5 As shown, in a preferred embodiment of the present invention, the rotating component 5 includes: A secondary shaft 501 is connected to the main shaft 4 via a differential module and to a rotating shaft 503 via a belt 502. The rotating shaft 503 is rotatably mounted on the housing 1. Gear 504 is rotatably mounted on housing 1 and coaxially fixedly connected to rotating shaft 503. Gear 504 meshes with gear ring 505. The top of the mesh bag 2 is open and a mounting ring is fixed at the top edge. The mounting ring is rotatably connected to housing 1. Gear ring 505 is sleeved on the outside of mounting ring and the two are coaxially fixedly connected.

[0025] In one embodiment, the gear ring 505 is the output end of the rotating component 5; the differential module includes a gear set and a bevel gear set, which can realize differential rotation between two linkage shafts. This is prior art, and this application has not improved it. Therefore, it is not necessary to disclose its specific mechanical structure and circuit structure, and it does not affect the integrity of this application.

[0026] In practical application, when the main shaft 4 rotates, the differential module enables the secondary shaft 501 to rotate synchronously and differentially. The secondary shaft 501 drives the rotating shaft 503 to rotate via the belt 502, which in turn causes the gear 504 to rotate synchronously. Then, the meshing transmission lower gear ring 505 can rotate, thereby driving the mesh bag 2 to rotate. In actual use, the parameters of the differential module are adjusted so that the soil particles in the mesh bag 2 can undergo centrifugal motion, which can accelerate the soil particles to pass through the mesh and enter the flow chamber.

[0027] like Figures 1-5 As shown, in a preferred embodiment of the present invention, the extrusion assembly 6 includes four extrusion plates 601 that are slidably mounted on the four sides of the flow chamber, and all four extrusion plates 601 are connected to the output end of the transmission assembly 7. The mesh bag 2 is located between the four extrusion plates 601, and a corner plate 602 is provided between two adjacent extrusion plates 601. The corner plate 602 is connected to the extrusion plate 601 through a telescopic plate 603, and the telescopic plate 603 is a telescopic structure.

[0028] In one embodiment, the telescopic structure is composed of nested multi-level plates. In practical applications, it can also adopt a gear and rack structure or an electric telescopic rod structure. This embodiment does not impose specific limitations on it.

[0029] In practical applications, the initial state of this embodiment is as follows: Figure 2As shown, the distance between the extrusion plates 601 is at its maximum at this time, and the mesh bag 2 rotates. When the main shaft 4 stops rotating, the drive source starts the transmission component 7. The output end of the transmission component 7 drives the four extrusion plates 601 to move towards the main shaft 4. The extrusion component 6 is in a contracted state and can extrude the mesh bag 2, so that the soil in the mesh bag 2 can be gathered and extruded, effectively preventing the soil from sticking together. It can realize the alternation of centrifugal motion and extrusion motion to treat the contaminated soil and improve the treatment efficiency of contaminated soil. During the extrusion process, when the four extrusion plates 601 move towards each other, the four corner plates 602 move synchronously towards the main shaft 4, and the telescopic plate 603 contracts.

[0030] like Figures 2-4 As shown, in a preferred embodiment of the present invention, the extrusion plate 601 is connected to the side wall of the housing 1 via an elastic member 604.

[0031] In one embodiment, the elastic element 604 can be a spring, or other elastic components such as silicone pillars or spring sheets, etc., which are not specifically limited in this embodiment.

[0032] In practical applications, after the extrusion is completed, the four extrusion plates 601 can move in opposite directions to reset, so as to facilitate extrusion again.

[0033] like Figures 1-9 As shown, in a preferred embodiment of the present invention, the transmission assembly 7 includes: A lifting ring 701 is connected to an output source 702, which in turn is connected to a drive source connected to an encoder. The lifting ring 701 is sleeved on the outside of the main shaft 4, and the two are coaxially arranged. The four sliders 704 correspond one-to-one with the four extrusion plates 601. Each slider 704 is hinged to one end of a connecting rod 703, and the other end of the connecting rod 703 is hinged to the lifting ring 701. The four connecting rods 703 are arranged in a circle, and the four sliders 704 are slidably installed on four horizontally arranged slide rails 706. The slide rails 706 are fixedly installed on the housing 1. The four sliders 704 are fixedly connected to the four extrusion plates 601 through four push rods 705.

[0034] In one embodiment, the push rod 705 is the output end of the transmission assembly 7; the output source 702 can be a hydraulic cylinder, a pneumatic cylinder, or other mechanisms capable of linear motion, which are not specifically limited in this embodiment; the drive source is connected to the encoder, which controls the output of the drive source to stop rotating after reaching a threshold number of rotations, and then restarts to rotate again after a period of time. The output source 702, the encoder, and other electrical components are all connected to an external controller. The output source 702 and the encoder are existing technologies, and this application does not improve them. Therefore, it is not necessary to disclose their specific mechanical and circuit structures, and this does not affect the completeness of this application.

[0035] In practical application, when the output end of the drive source stops rotating, the encoder sends a signal to the external controller. The external controller controls the output source 702 to start, and the output end of the output source 702 shortens to drive the lifting ring 701 to rise. Then, the four connecting rods 703 flip, thereby driving the four sliders 704 to move on the slide rail 706 towards the direction closer to the main shaft 4. In turn, the push rod 705 can drive the extrusion plate 601 to move towards the direction closer to the main shaft 4, thereby realizing the extrusion of the mesh bag 2.

[0036] like Figures 1-9 As shown, in a preferred embodiment of the present invention, a guide rod 707 is fixedly installed on the slide rail 706, and a limit block 708 is fixed at the end of the guide rod 707 near the main shaft 4. A limit groove 709 is opened at the end of the slider 704 near the main shaft 4, and the limit block 708 slides and engages with the limit groove 709.

[0037] In practical application, the guide rod 707 is arranged through the slider 704 and the push rod 705, which can guide and limit the movement direction of the slider 704 and the push rod 705, preventing them from deviating from the preset path. One end of the limiting groove 709 is opened through the slider 704, and the other end is located inside the slider 704. When the slider 704 slides, the limiting block 708 slides into the limiting groove 709. When it reaches the blocking end of the limiting groove 709, it is locked, limiting the slider 704 so that it can not continue to slide and can only slide in the opposite direction.

[0038] like Figures 3-9 As shown, in a preferred embodiment of the present invention, a stirring element 8 is mounted on the main shaft 4, and the two rotate synchronously.

[0039] In one embodiment, the stirring component 8 includes a stirring shaft 801 and several circumferentially arranged and fixedly mounted partition rods 802 on the stirring shaft 801. A cross-shaped rod 12 is coaxially fixedly connected to the bottom of the main shaft 4. A cross-shaped groove 13 is provided through the central axis of the stirring shaft 801, and the cross-shaped groove 13 engages with the cross-shaped rod 12. The partition rod 802 has a rhomboid cross section, which can split the soil particle pile when it rotates, thereby dividing and breaking up the soil pile and preventing the soil from sticking together.

[0040] The cross-shaped groove 13 engages and slides with the cross-shaped rod 12. A fixing rod 9 is fixedly installed on the lifting ring 701, and the fixing rod 9 is fixedly connected to the positioning ring 10 sleeved on the outside of the cross-shaped rod 12. The positioning ring 10 slides with the annular groove 11 opened on the stirring shaft 801, and the annular groove 11 is coaxially arranged with the stirring shaft 801. The positioning ring 10 and the annular groove 11 are slidably engaged.

[0041] In practical application, when the main shaft 4 rotates, it drives the mesh bag 2 to rotate via the rotating component 5. Simultaneously, the cross-shaped rod 12, through its engagement with the cross-shaped groove 13, drives the mixing shaft 801 to rotate synchronously. The rotation of several partition rods 802 can then divide and disperse the soil pile into sections. When the main shaft 4 stops rotating, the output source 702 drives the lifting ring 701 to rise. The lifting ring 701, through the fixing rod 9, drives the positioning ring 10 to rise synchronously. Due to the engagement of the positioning ring 10 with the ring groove 11, the mixing shaft 801 rises synchronously. During this process, relative sliding occurs between the cross-shaped rod 12 and the cross-shaped groove 13. This allows the mixing component 8 to rise synchronously to offset from the extrusion component 6 during the compression of the extrusion component 6 to compress the mesh bag 2, avoiding the mixing component 8 affecting the extrusion path and causing a short extrusion path that cannot fully compress the soil.

[0042] Please see Figures 1-9 As shown, the present invention is a method for soil pollution remediation, which is applied to the soil pollution remediation equipment described in the above embodiments. The method includes the following steps: Step S1: Put the contaminated soil into the mesh bag 2 and pour chemical agents into the mesh bag 2; Step S2: Start the drive source to drive the main shaft 4 to rotate intermittently, then the rotating component 5 drives the mesh bag 2 to rotate, so that the soil in the mesh bag 2 undergoes centrifugal motion, and the soil particles can pass through the mesh of the mesh bag 2 and enter the flow chamber. Step S3: When the main shaft 4 stops rotating, the drive source starts the transmission assembly 7 to drive the extrusion assembly 6 to contract and extrude the mesh bag 2; Step S4: After repeating steps S2 to S3 multiple times, open the valve on the discharge pipe 3 to discharge the soil particles in the flow chamber.

[0043] The working principle of this invention: The above embodiments of this invention provide a soil pollution treatment device and method. Polluted soil is placed into a mesh bag 2, and chemical agents are poured into the mesh bag 2. Then, the drive source is activated to drive the main shaft 4 to rotate intermittently. The rotating component 5 drives the mesh bag 2 to rotate, causing the soil inside the mesh bag 2 to undergo centrifugal motion. Soil particles can pass through the mesh openings of the mesh bag 2 and enter the flow chamber. This achieves the cleaning and screening of the polluted soil inside the mesh bag 2, allowing impurities to remain inside the mesh bag 2. When the main shaft 4 stops rotating, the drive source activates the transmission component 7 to drive the extrusion component 6 to contract and extrude the mesh bag 2. In other words, after a period of centrifugal motion, the soil particles inside the mesh bag 2 stop moving and are gathered and extruded, effectively preventing soil from clumping together and making it difficult for soil particles to pass through the mesh. After repeating the above steps multiple times, the valve on the discharge pipe 3 is opened to discharge the soil particles from the flow chamber, thus achieving the collection of treated polluted soil.

[0044] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A soil pollution remediation device, characterized in that, include: The shell (1) has an open top and a mesh bag (2) is rotatably installed inside it. The mesh bag (2) and the shell (1) form a flow cavity. The bottom of the shell (1) is connected to the discharge pipe (3). The main shaft (4) is driven to rotate intermittently by a drive source mounted on the housing (1), and the main shaft (4) is connected to the rotating assembly (5), the output end of which is connected to the mesh bag (2); as well as The extrusion assembly (6) is located in the flow chamber and is connected to the drive source through the transmission assembly (7). When the main shaft (4) stops rotating, the drive source starts the transmission assembly (7) to drive the extrusion assembly (6) to contract and extrude the mesh bag (2).

2. The soil pollution remediation equipment according to claim 1, characterized in that, The rotating component (5) includes: A secondary shaft (501), which is connected to the main shaft (4) via a differential module, and which is connected to a rotating shaft (503) via a belt (502), the rotating shaft (503) being rotatably mounted on the housing (1); and Gear (504) is rotatably mounted on housing (1) and coaxially fixedly connected to shaft (503). Gear (504) meshes with gear ring (505). The top of the mesh bag (2) is open and a mounting ring is fixed at the top edge. The mounting ring is rotatably connected to housing (1). The gear ring (505) is sleeved on the outside of the mounting ring and the two are coaxially fixedly connected.

3. The soil pollution remediation equipment according to claim 1, characterized in that, The extrusion assembly (6) includes four extrusion plates (601) that are slidably installed on the four sides of the flow chamber, and all four extrusion plates (601) are connected to the output end of the transmission assembly (7). The mesh bag (2) is located between the four extrusion plates (601), and a corner plate (602) is provided between two adjacent extrusion plates (601). The corner plate (602) is connected to the extrusion plate (601) through a telescopic plate (603), and the telescopic plate (603) is a telescopic structure.

4. The soil pollution remediation equipment according to claim 3, characterized in that, The extrusion plate (601) is connected to the side wall of the housing (1) via an elastic element (604).

5. The soil pollution remediation equipment according to claim 3, characterized in that, The transmission assembly (7) includes: A lifting ring (701) is connected to an output source (702), which is connected to a drive source, which is connected to an encoder. The lifting ring (701) is sleeved on the outside of the main shaft (4), and the two are coaxially arranged. The four sliders (704) correspond one-to-one with the four extrusion plates (601). Each slider (704) is hinged to one end of a connecting rod (703), and the other end of the connecting rod (703) is hinged to the lifting ring (701). The four connecting rods (703) are arranged in a circle, and the four sliders (704) are slidably installed on four horizontally arranged slide rails (706). The slide rails (706) are fixedly installed on the housing (1). The four sliders (704) are fixedly connected to the four extrusion plates (601) through four push rods (705).

6. The soil pollution remediation equipment according to claim 5, characterized in that, A guide rod (707) is fixedly installed on the slide rail (706), and a limit block (708) is fixed at the end of the guide rod (707) near the main shaft (4). A limit groove (709) is opened at the end of the slider (704) near the main shaft (4), and the limit block (708) and the limit groove (709) are slidably engaged.

7. The soil pollution remediation equipment according to claim 5, characterized in that, The main shaft (4) is equipped with a stirring component (8), and the two rotate synchronously.

8. The soil pollution remediation equipment according to claim 7, characterized in that, The stirring component (8) includes a stirring shaft (801) and several partition rods (802) arranged in a circle and fixed on the stirring shaft (801). A cross-shaped rod (12) is coaxially fixedly connected to the bottom of the main shaft (4). A cross-shaped groove (13) is opened through the central axis of the stirring shaft (801), and the cross-shaped groove (13) engages with the cross-shaped rod (12).

9. A soil pollution remediation device according to claim 8, characterized in that, The cross-shaped groove (13) is engaged and slidably fitted with the cross-shaped rod (12). A fixing rod (9) is fixedly installed on the lifting ring (701), and the fixing rod (9) is fixedly connected with the positioning ring (10) sleeved on the outside of the cross-shaped rod (12). The positioning ring (10) is slidably fitted with the ring groove (11) opened on the stirring shaft (801), and the ring groove (11) is coaxially arranged with the stirring shaft (801).

10. A method for remediating soil pollution, characterized in that, The method is applied to the soil pollution remediation equipment as described in any one of claims 1-9 above, and the method includes the following steps: Step S1: Put the contaminated soil into the mesh bag (2) and pour chemical agents into the mesh bag (2); Step S2: Start the drive source to drive the main shaft (4) to rotate intermittently, then the rotating component (5) drives the mesh bag (2) to rotate, so that the soil in the mesh bag (2) undergoes centrifugal motion, and the soil particles can pass through the mesh of the mesh bag (2) and enter the flow chamber; Step S3: When the main shaft (4) stops rotating, the drive source starts the transmission assembly (7) to drive the extrusion assembly (6) to contract and extrude the mesh bag (2). Step S4: After repeating steps S2 to S3 multiple times, open the valve on the discharge pipe (3) to discharge the soil particles in the flow chamber.

Images