Organic contaminated soil in-situ leaching circulating remediation device and remediation method thereof

Abstract

The invention discloses an organic contaminated soil in-situ leaching circulating remediation device which is characterized in that a soil digging mechanism is matched with a conveying belt, to-be-remedied soil is collected and conveyed to a crushing and screening mechanism, the crushing and screening mechanism firstly crushes the fed soil, impurities such as large stones and plant roots in the soil are separated in a vibration screening mode, and the impurities are recycled. The crushed and screened soil enters the leaching and mixing mechanisms through the material receiving groove, the soil is leached, repaired and stirred through the leaching and mixing mechanisms, the number of the leaching and mixing mechanisms is multiple, any leaching and mixing mechanism can be stopped through the overhauling mechanism, the faulted leaching and mixing mechanism is overhauled and maintained, and the service life of the leaching and mixing mechanisms is prolonged. And normal work of other leaching and mixing mechanisms is not affected, soil enters the mixing box at the rear end after passing through the leaching and mixing mechanisms, reagents are evenly scattered into slurry mixed with leaching liquid through the mixing mechanisms, the slurry is stirred in different directions, and soil remediation work is completed.

Description

Technical Field

[0001] This invention belongs to the field of soil remediation technology, and specifically relates to an in-situ leaching and recycling remediation device and method for organically contaminated soil. Background Technology

[0002] In-situ leaching and recycling remediation devices for organically contaminated soil are mainly used to treat hydrophobic organic pollutants such as petroleum hydrocarbons and polycyclic aromatic hydrocarbons. Traditional ex-situ remediation requires excavation and transportation, which is costly and prone to secondary pollution. Moreover, it often uses water or chemical agents for one-way rinsing, which has problems such as high agent consumption, pollution plume diffusion, and incomplete remediation. In contrast, in-situ soil leaching technology has advantages such as high treatment efficiency, short remediation cycle, and the ability to treat high-concentration contaminated soil.

[0003] A search revealed that the existing technology patent publication number CN111112318A discloses an organic contaminated soil remediation device, which includes a microwave drying device, a microwave high-temperature device, and a discharge device. A first conveying component is installed through the microwave drying device; a second conveying component is installed through the microwave high-temperature device, with the inlet of the second conveying component connected to the outlet of the first conveying component; the inlet of the discharge device is connected to the outlet of the second conveying component. This device utilizes the microwave drying device to pre-dry the soil, avoiding the removal of organic pollutants and improving the efficiency of subsequent microwave high-temperature device remediation of the soil.

[0004] A search revealed a soil heavy metal remediation leaching device with prior art authorization announcement number CN223222180U, which includes an outer shell with first fixing plates fixedly connected to both sides of the shell. This device can vibrate and screen the soil while transporting it, causing the soil clods to break into smaller pieces. Finally, the soil falls onto the conveyor belt through the screen of the screening box for transport, thereby achieving thorough leaching of the soil with the washing solution. However, this device does not have a post-leaching stirring mechanism, making it difficult to ensure that all the soil is fully mixed with the leaching solution.

[0005] A search revealed a prior art patent publication number CN 223097610 U for a leaching remediation device for heavy metal contaminated soil. This device uses a swinging toothed fan and a drive rod to drive the spray plates on both sides to swing back and forth, directly spraying remediation liquid onto the soil for soil remediation. However, direct spraying without prior treatment results in uneven treatment and makes it difficult for the sprayed liquid to reach deep soil contaminants, leading to uneven and unpredictable treatment effects. Furthermore, the sprayed liquid is highly susceptible to infiltration with rainwater or groundwater, causing vertical migration of contaminants, polluting deep soil and groundwater, or horizontal runoff, polluting the surrounding environment and causing pollution diffusion. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide an in-situ leaching and circulating remediation device and method for organically contaminated soil. A soil-digging mechanism, in conjunction with a conveyor belt, collects and transports the soil to be remediated to a crushing and screening mechanism. The crushing and screening mechanism first breaks up the incoming soil, then separates large stones, plant roots, and other impurities through a vibrating screen. The crushed and screened soil then enters a leaching and mixing mechanism through a receiving trough. This mechanism leaches and mixes the soil, and multiple sets of leaching and mixing mechanisms are provided. A maintenance mechanism allows any set of leaching and mixing mechanisms to be stopped for repair and maintenance of any malfunctioning mechanism without affecting the normal operation of other leaching and mixing mechanisms. After passing through the leaching and mixing mechanism, the soil enters a mixing tank at the rear. The mixing mechanism evenly sprinkles reagents into the slurry of the mixed leaching solution and stirs it in different directions to complete the soil remediation work.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] An in-situ leaching and recycling remediation device for organically contaminated soil, the specific remediation method of which is as follows:

[0009] 1) Soil collection: Using a soil excavator and conveyor belt, the contaminated soil is transported to the crushing and screening mechanism above the device. The soil excavator and conveyor belt are controlled to send the contaminated soil into the device at a rate of 2-5 tons / hour.

[0010] 2) Crushing and Vibrating Screening: The crushing roller crushes large nodular soil particles. Impurities that cannot be crushed, such as stones, branches, and garbage, are separated from the soil through the crushing and screening mechanism. Under the vibration of the crushing and screening mechanism, the particles enter the gravel collection box on the side of the device. After crushing and screening, the soil particles passing through the screen plate are uniform in size to meet the requirements of subsequent leaching.

[0011] 3) Leaching Remediation: After passing through the crushing and screening mechanism, the soil enters the leaching and mixing mechanism. The hollow auger is controlled to rotate downwards at a speed of 5-10 rpm, ensuring that the soil residence time in the hollow auger is 2-4 minutes. The nozzles located at the top of the hollow auger spray the leaching agent at a pressure of 15-35 kPa. The leaching agent selected is 1% polysorbate-80 remediation solution, which can effectively treat most hydrophobic organic pollutants, such as petroleum hydrocarbons (TPH), polycyclic aromatic hydrocarbons (PAHs), chlorinated solvents (CE, TCE), pesticides, etc. At the same time, the multiple sets of stirring mechanisms I in the hollow auger are controlled to stir and mix the moist soil at a rate of 20-30 rpm, thus completing the triple operation of conveying, spraying and stirring in a continuous process, enhancing work efficiency.

[0012] 4) Chemical addition: After the soil is washed and mixed by the leaching and mixing mechanism, it enters the mixing tank. The spreading mechanism on the mixing mechanism spreads the chemicals evenly back and forth on the mud, and sprinkles in quicklime, hydrated lime or calcium carbonate and other neutralizing and drying agents to neutralize the acidic environment after leaching and adjust the soil pH to neutral or weakly alkaline. Then, stabilizing agents such as phosphate, sulfide or biochar are sprinkled in to further reduce the activity of residual organic matter or metals.

[0013] 5) Mixing: While applying the medicine, control motor III in the mixing mechanism to drive connecting rod I to rotate. Control the mixing mechanism II and the mixing claw to swing forward through the connecting frame, pushing the mixed material slowly and steadily towards the discharge port at a speed of 0.1-0.3 m / min. Ensure that the mixed material stays in the mixing box for 10-20 minutes. The mixing mechanism II in the mixing mechanism performs transverse mixing of the mixed material in the mixing box, controlling the mixing speed to 20-40 rpm. The mixing claw performs longitudinal mixing of the mixed material in the mixing box, controlling the mixing speed to 30-50 rpm.

[0014] A device and method for in-situ leaching and circulating remediation of organically contaminated soil includes a crushing and screening mechanism, a gravel collection box, a receiving trough, a leaching and mixing mechanism, a motor I, a maintenance mechanism, a water pump, a mixing mechanism, a mixing tank, an installation platform, a planer, and a conveyor belt. The installation platform is located below the overall device, the planer is located at the front end of the overall device, a conveyor belt is located behind the planer, a crushing and screening mechanism is located behind the conveyor belt, a gravel collection box is located on one side of the crushing and screening mechanism, a receiving trough is located below the crushing and screening mechanism, a connecting plate I is located below the receiving trough, the connecting plate I is fixed on a support platform I, the leaching and mixing mechanism is located below the connecting plate I, a cover plate is located at the front end of the support platform I, a maintenance plate is located on the cover plate, the motor I is fixed to the outside of the cover plate, the output end of the motor I is connected to a drive shaft I, multiple sets of helical gears I are located on the drive shaft I, the helical gears I are connected to the maintenance mechanism, the maintenance mechanism also cooperates with the leaching and mixing mechanism, the water pump is located outside the support platform I, a mixing tank is located at the rear end of the leaching and mixing mechanism, and the mixing mechanism is located inside the mixing tank.

[0015] The installation platform serves as the supporting base for the entire device, enabling modularity, portability, and rapid deployment. A soil-digging mechanism, in conjunction with a conveyor belt, collects and transports the soil to be remediated to a crushing and screening mechanism. This mechanism first breaks up the incoming soil, crushing clumps to a predetermined particle size to increase surface area and improve leaching efficiency. Then, a vibrating screen separates large stones, plant roots, and other impurities from the soil. The screened large impurities enter a gravel collection box. The leached soil then enters a leaching and mixing mechanism via a receiving trough. This mechanism leaches and mixes the soil, and multiple sets of leaching and mixing mechanisms are available. A maintenance mechanism allows any set to be stopped, enabling maintenance of any malfunctioning unit without affecting the normal operation of others. After passing through the leaching and mixing mechanism, the soil enters a mixing tank at the rear. The mixing mechanism evenly distributes dry powder agents into the water-soil mixture of the leaching solution and stirs it in different directions. During stirring, the water-soil mixture is pushed backward into the mixing tank, completing the soil remediation work.

[0016] The rinsing and mixing mechanism includes a helical gear VI, a base, a rotary connector, a motor II, a stirring mechanism I, a hollow auger, and an auger housing I. The helical gear VI is mounted on the base, and the rotary connector and motor II are located inside the base. A water pipe is connected to a water pump through the rotary connector, and a nozzle is mounted on the water pipe. Motor II is connected to a circuit through the rotary connector, and the output end of motor II is connected to a drive shaft IV. The stirring mechanism I is mounted on the drive shaft IV. The hollow auger is fixed on the base, and a top plate is provided on the upper part of the hollow auger. The water pipe and drive shaft IV are located inside the hollow auger, and the nozzle and stirring mechanism I are located outside the hollow auger. An auger housing I is located outside the hollow auger and is fixed inside a support platform I.

[0017] The stirring mechanism I includes a helical gear VII, a helical gear VIII, a drive shaft V, and a stirring rod; the helical gear VII is mounted on the drive shaft IV, the helical gear VII meshes with the helical gear VIII, the helical gear VIII is mounted on the drive shaft V, the drive shaft V passes through a hollow auger and is rotatably connected to the hollow auger, and the stirring rod is mounted on the drive shaft V.

[0018] The maintenance mechanism includes a helical gear II, a transmission shaft II, a clutch mechanism, an operating lever, a sealing cover, and a positioning plate III. The helical gear II meshes with helical gear I. Helical gear II is mounted on the transmission shaft II, which passes through the cover and is rotatably connected to it. A clutch mechanism is located at the rear end of the transmission shaft II, and a helical gear III is located at the rear end of the clutch mechanism. Helical gear III meshes with helical gear VI. The transmission shaft III is located above the clutch mechanism and is rotatably connected to the positioning plate III. Helical gear IV is mounted on the transmission shaft III and meshes with helical gear V. Helical gear V is mounted on the operating lever, which passes through the cover and is rotatably connected to it. Gear I is also mounted on the transmission shaft III and meshes with a rack. The rack is fixed to one end of the sealing cover. Gear I, the rack, and the sealing cover are also located inside the connecting plate I. The sealing cover and the connecting plate I are slidably connected by a keyway. The sealing cover is also located above the auger housing I, and the circular opening on the sealing cover matches the opening on the upper part of the auger housing I.

[0019] The clutch mechanism includes a swing plate, a lever, a sliding disk, an annular guide groove, a guide shaft, a coupling slider I, a connecting shaft, and a coupling slider II. The swing plate is located at the lower part of the transmission shaft III. One end of the swing plate is equipped with a lever, which is also located in a groove on the side of the sliding disk. An annular guide groove is fixed in the middle of the sliding disk. The annular guide groove is located on the guide shaft and is slidably connected to the guide shaft via a keyway. The guide shaft is fixed on the transmission shaft II. The rear end of the sliding disk is fixed with a coupling slider I. A connecting shaft is fixed on the coupling slider I. The connecting shaft is also located in a groove in the middle of the coupling slider II and is slidably connected to the coupling slider II. The teeth and grooves on the end faces of the coupling slider I and the coupling slider II mesh with each other, and the torque can be transmitted from one slider to the other through the contact of the tooth surfaces.

[0020] The mixing mechanism includes a motor III, connecting rod I, a connecting frame, a sliding rod, a positioning plate IV, a stirring mechanism II, a dispensing mechanism, a motor IV, a positioning plate V, and stirring claws. The motor III is fixed to the outer wall of the mixing tank. The output end of the motor III is connected to connecting rod I. There are four sets of connecting rods I. Other connecting rods I are located inside the mixing tank and rotatably connected to it. The four sets of connecting rods I are arranged in a rectangular pattern. A connecting frame is provided between two adjacent sets of connecting rods I. A sliding rod is fixed on the connecting frame, and a connecting plate II is provided on the sliding rod. The connecting plate II is slidably connected to the sliding rod. A limit shaft III is fixed on one side of the connecting plate II. The limit shaft III is also located in a groove I on the mixing tank and slidably connected to it. A connecting rod II is provided at one end of the connecting plate II. A dispensing mechanism is provided between the connecting rods II. A driven shaft is provided at the lower end of the connecting rod I. Helical gears IX are provided at both ends of the driven shaft. Helical gears IX mesh with helical gear X. The drive shaft VI is positioned on the drive shaft VI, which is rotatably connected to the positioning plate IV. A protective cover II is also fixed on the positioning plate IV. Helical gear IX, driven shaft, and helical gear X are all housed inside the protective cover II. A drive belt I is located at the other end of the drive shaft VI, connecting the drive shaft VI to the stirring mechanism II via the drive belt I. The drive belts I on both sides are symmetrically arranged. Multiple stirring mechanisms are connected via the drive belts I. A connecting cover is fixed to one end of the positioning plate IV, with all drive belts I located inside the connecting cover. A positioning plate V is located at the other end of the connecting cover. A motor mounting plate is fixed to the positioning plate V, and motor IV is fixed to the motor mounting plate. The output end of motor V is connected to the stirring claw, which is also rotatably connected to the positioning plate V from below. Multiple stirring claws are interconnected via the drive belts II. The protective cover I is fixed to the positioning plate V, and all drive belts II are located inside the protective cover I.

[0021] The material spreading mechanism includes a motor V, an auger, and an auger housing II. The auger housing II is fixed on the connecting rod II. There are two sets of motor V and auger, both located inside the auger housing II. The output end of motor V is connected to the auger. Motor V controls the rotation of the auger, and the rotation of the auger spreads the desiccant and repair agent into the mixing box.

[0022] The mixing mechanism II includes a drive shaft VIII, a cross-shaped plate, and mixing blades. The drive shaft VIII is rotatably connected to the positioning plates IV. The cross-shaped plate is mounted on the drive shaft VIII, and the mixing blades are mounted between the cross-shaped plates. The rotation of the drive shaft VIII drives the cross-shaped plate to rotate, which in turn drives the mixing blades to rotate. The mixing blades then perform lateral mixing of the soil in the mixing tank.

[0023] The advantages of this invention compared to existing technologies are as follows:

[0024] 1) The crushing rollers of the crushing and screening mechanism crush large pieces of soil. The loose soil passes through the screen plate and enters the next process. After crushing and screening, the soil particles passing through the screen plate are uniform in size to meet the requirements of subsequent leaching. Then, the vibration of the screen plate separates large stones, plant roots and other impurities from the soil.

[0025] 2) The rinsing and mixing mechanism enables the simultaneous conveying, spraying and mixing of soil. The soil is then grouped and treated by multiple sets of rinsing and mixing mechanisms, thereby enhancing the contact efficiency and mixing uniformity between the rinsing liquid and soil particles.

[0026] 3) The maintenance mechanism allows other rinsing and mixing mechanisms to continue operating normally while a single unit is shut down for maintenance, ensuring that the overall production efficiency of the system is not affected. This maintenance mode effectively avoids production losses due to a complete shutdown and improves the availability and continuity of the system.

[0027] 4) The mixing mechanism swings forward as a whole, and the spreading mechanism inside the mixing mechanism spreads the desiccant and stabilizer into the mixing box more evenly. The stirring mechanism II and the stirring claw work together to significantly improve the processing efficiency and uniformity. It is especially suitable for viscous materials and solid-liquid mixing. It can achieve high uniformity that is difficult to achieve by single stirring while shortening the mixing time, and effectively avoids stirring dead corners and clumping problems. Attached Figure Description

[0028] Appendix Figure 1 This is a schematic diagram of the structure of an in-situ leaching and recycling remediation device for organically contaminated soil according to the present invention. Figure 1 ;

[0029] Appendix Figure 2 This is a schematic diagram of the structure of an in-situ leaching and recycling remediation device for organically contaminated soil according to the present invention. Figure 2 ;

[0030] Appendix Figure 3 This is a schematic diagram of the structure of an in-situ leaching and recycling remediation device for organically contaminated soil according to the present invention. Figure 3 ;

[0031] Appendix Figure 4 This is a schematic diagram of the structure of an in-situ leaching and recycling remediation device for organically contaminated soil according to the present invention. Figure 4 ;

[0032] Appendix Figure 5 This is a schematic diagram of the structure of an in-situ leaching and recycling remediation device for organically contaminated soil according to the present invention. Figure 5 ;

[0033] Appendix Figure 6 It is attached Figure 5 Schematic diagram of the intermediate maintenance mechanism Figure 1 ;

[0034] Appendix Figure 7 It is attached Figure 5 Schematic diagram of the intermediate maintenance mechanism Figure 2 ;

[0035] Appendix Figure 8 It is attached Figure 7 Schematic diagram of the clutch mechanism;

[0036] Appendix Figure 9 It is attached Figure 7 Schematic diagram of the intermediate rinsing mixing mechanism Figure 1 ;

[0037] Appendix Figure 10 It is attached Figure 7 Schematic diagram of the intermediate rinsing mixing mechanism Figure 2 ;

[0038] Appendix Figure 11 This is a schematic diagram of the structure of an in-situ leaching and recycling remediation device for organically contaminated soil according to the present invention. Figure 6 ;

[0039] Appendix Figure 12 It is attached Figure 11 Schematic diagram of the mixing mechanism Figure 1 ;

[0040] Appendix Figure 13 It is attached Figure 11 Schematic diagram of the mixing mechanism Figure 2 ;

[0041] Appendix Figure 14 It is attached Figure 11 Schematic diagram of the mixing mechanism Figure 3 ;

[0042] Appendix Figure 15 It is attached Figure 13 Schematic diagram of the stirring mechanism II;

[0043] Appendix Figure 16 This is a schematic diagram of the structure of an in-situ leaching and recycling remediation device for organically contaminated soil according to the present invention. Figure 7 ;

[0044] In the diagram: 11. Crushing and screening mechanism; 12. Crushed stone collection box; 13. Receiving chute; 14. Connecting plate I; 15. Washing and mixing mechanism; 16. Support platform I; 17. Cover plate; 1701. Inspection plate; 18. Motor I; 19. Drive shaft I; 20. Helical gear I; 21. Inspection mechanism; 22. Water pump; 23. Mixing mechanism; 24. Mixing box; 2401. Sluice box I; 26. Installation platform; 27. Excavator; 28. Conveyor belt;

[0045] 201. Helical Gear II; 202. Drive Shaft II; 203. Clutch Mechanism; 204. Helical Gear III; 205. Drive Shaft III; 206. Helical Gear IV; 207. Helical Gear V; 208. Operating Lever; 209. Gear I; 210. Rack; 211. Sealing Cover; 212. Positioning Plate III;

[0046] 2101. Swing plate; 2102. Actuating lever; 2103. Sliding disk; 2104. Annular guide groove; 2105. Guide shaft; 2106. Coupling slider I; 2107. Connecting shaft; 2108. Coupling slider II;

[0047] 301. Helical gear VI; 302. Base; 303. Rotary connector; 304. Water pipe; 305. Nozzle; 306. Motor II; 307. Drive shaft IV; 308. Stirring mechanism I; 309. Hollow auger; 310. Top plate; 311. Auger housing I;

[0048] 3101, Helical gear VII; 3102, Helical gear VIII; 3103, Drive shaft V; 3104, Stirring rod;

[0049] 401. Motor III; 402. Connecting rod I; 403. Connecting frame; 404. Sliding rod; 405. Connecting plate II; 406. Limiting shaft III; 407. Helical gear IX; 408. Driven shaft; 409. Helical gear X; 410. Positioning plate IV; 411. Transmission shaft VI; 412. Transmission belt I; 413. Stirring mechanism II; 414. Connecting rod II; 415. Spreading mechanism; 416. Motor IV; 417. Motor mounting plate; 418. Positioning plate V; 419. Transmission belt II; 420. Stirring claw; 421. Protective cover I; 422. Connecting cover; 423. Protective cover II;

[0050] 4101. Motor V; 4102. Screwdriver; 4103. Screwdriver housing II;

[0051] 4301, Drive shaft VIII; 4302, Cross-shaped plate; 4303, Agitator blade. Detailed Implementation

[0052] To facilitate understanding by those skilled in the art, the following is a detailed explanation in conjunction with the appendix. Figure 1-16 The technical solution of the present invention will be further described in detail below.

[0053] An in-situ leaching and recycling remediation device for organically contaminated soil, the specific remediation method of which is as follows:

[0054] 1) Soil collection: Using a soil excavator 27 in conjunction with a conveyor belt 28, the contaminated soil is transported to the crushing and screening mechanism 11 above the device. The soil excavator 27 and the conveyor belt 28 are controlled to send the contaminated soil into the device at a rate of 2-5 tons / hour.

[0055] 2) Crushing and Vibrating Screening: The crushing roller crushes large pieces of soil. Impurities that cannot be crushed, such as stones, branches, and garbage, are separated from the soil by the crushing and screening mechanism 11. Under the vibration of the crushing and screening mechanism 11, the soil enters the gravel collection box 12 on the side of the device. The soil particles after crushing and screening are uniform in size to meet the requirements of subsequent leaching.

[0056] 3) Leaching Remediation: After passing through the crushing and screening mechanism 11, the soil enters the leaching and mixing mechanism 15. The hollow auger 309 is controlled to rotate downwards at a speed of 5-10 rpm, ensuring that the soil residence time in the hollow auger 309 is 2-4 minutes. The nozzle 305 located at the top of the hollow auger 309 sprays the leaching agent at a pressure of 15-35 kPa. The leaching agent is 1% polysorbate-80 remediation solution, which can effectively treat most hydrophobic organic pollutants, such as petroleum hydrocarbons TPH, polycyclic aromatic hydrocarbons PAHs, chlorinated solvents CE, TCE, pesticides, etc. At the same time, the multiple sets of stirring mechanisms I 308 in the hollow auger 309 are controlled to stir and mix the moist soil at a speed of 20-30 rpm, so as to complete the triple operation of conveying, spraying and stirring in a continuous process, thereby enhancing work efficiency.

[0057] 4) Chemical addition: After the soil is washed and mixed by the leaching and mixing mechanism 15, it enters the mixing tank 24. The spreading mechanism 415 on the mixing mechanism 23 spreads the chemical evenly back and forth on the mud, and sprinkles in quicklime, hydrated lime or calcium carbonate and other neutralizing and drying agents to neutralize the acidic environment after leaching and adjust the soil pH to neutral or weakly alkaline. Then, stabilizing agents such as phosphate, sulfide or biochar are sprinkled in to further reduce the activity of residual organic matter or metals.

[0058] 5) Mixing: While applying the medicine, the motor Ⅲ401 in the mixing mechanism 23 drives the connecting rod Ⅰ402 to rotate. The connecting frame 403 controls the mixing mechanism Ⅱ413 and the mixing claw 420 to swing forward, pushing the mixed material slowly and steadily towards the discharge port at a speed of 0.1-0.3 m / min. This ensures that the mixed material stays in the mixing box 24 for 10-20 minutes. The mixing mechanism Ⅱ413 in the mixing mechanism 23 performs transverse mixing of the mixed material in the mixing box 24, controlling the mixing speed to be 20-40 rpm. The mixing claw 420 performs longitudinal mixing of the mixed material in the mixing box 24, controlling the mixing speed to be 30-50 rpm.

[0059] An in-situ leaching and recycling remediation device for organically contaminated soil includes a crushing and screening mechanism 11, a gravel collection box 12, a receiving trough 13, a leaching and mixing mechanism 15, a motor 18, a maintenance mechanism 21, a water pump 22, a mixing mechanism 23, a mixing box 24, an installation platform 26, a planer 27, and a conveyor belt 28. The installation platform 26 is located below the entire device, the planer 27 is located at the front end of the entire device, the conveyor belt 28 is located behind the planer 27, the crushing and screening mechanism 11 is located behind the conveyor belt 28, the gravel collection box 12 is located on one side of the crushing and screening mechanism 11, and the receiving trough 13 is located below the crushing and screening mechanism 11. A connecting plate I14 is provided below, which is fixed on the support platform I16. A rinsing and mixing mechanism 15 is provided below the connecting plate I14. A cover plate 17 is provided at the front end of the support platform I16. A maintenance plate 1701 is provided on the cover plate 17. A motor I18 is fixed on the outside of the cover plate 17. The output end of the motor I18 is connected to the transmission shaft I19. Multiple sets of helical gears I20 are provided on the transmission shaft I19. The helical gears I20 are connected to the maintenance mechanism 21. The maintenance mechanism 21 also cooperates with the rinsing and mixing mechanism 15. A water pump 22 is provided on the outside of the support platform I16. A mixing box 24 is provided at the rear end of the rinsing and mixing mechanism 15. A mixing mechanism 23 is provided in the mixing box 24.

[0060] The installation platform 26 serves as the supporting base for the entire device, enabling modularity, portability, and rapid deployment. The excavator 27, in conjunction with the conveyor belt 28, collects and transports the soil to be remediated to the crushing and screening mechanism 11. The crushing and screening mechanism 11 first breaks up the incoming soil, crushing clumps to a predetermined particle size to increase surface area and improve leaching efficiency. Then, it separates large stones, plant roots, and other impurities from the soil through vibrating screening. The screened large impurities enter the gravel collection box 12, and the screened soil enters the leaching and mixing mechanism 15 through the receiving trough 13. The soil is then leached and mixed... The unit 15 performs leaching and mixing of the soil. The leaching and mixing unit 15 is equipped with multiple sets. The maintenance unit 21 can control any set of leaching and mixing units 15 to stop working, and perform maintenance on the malfunctioning leaching and mixing units 15 without affecting the normal operation of other leaching and mixing units 15. After passing through the leaching and mixing unit 15, the soil enters the mixing tank 24 at the rear end. The mixing unit 23 evenly sprinkles the dry powder agent into the water-soil mixture of the leaching solution and stirs it in different directions. During the stirring process, the water-soil mixture is pushed backward out of the mixing tank 24 to complete the soil remediation work.

[0061] The rinsing and mixing mechanism 15 includes a helical gear VI 301, a base 302, a rotary connector 303, a motor II 306, a stirring mechanism I 308, a hollow auger 309, and an auger housing I 311. The helical gear VI 301 is mounted on the base 302. The rotary connector 303 and motor II 306 are located inside the base 302. A water pipe 304 is connected to a water pump 22 via the rotary connector 303. A nozzle 305 is mounted on the water pipe 304. The motor II 306 is connected to a circuit via the rotary connector 303. The output end of the motor II 306 is connected to a drive shaft IV 307. The stirring mechanism I 308 is mounted on the drive shaft IV 307. The hollow auger 309 is fixed on the base 302. A top plate 310 is located on the upper part of the hollow auger 309. The water pipe 304 and drive shaft IV 307 are located inside the hollow auger 309, while the nozzle 305 and stirring mechanism I 308 are located outside the hollow auger 309. The hollow auger 309 is externally equipped with an auger housing I 311, which is fixed inside the support platform I 16. When the helical gear VI 301 rotates, it drives the base 302 to rotate, which in turn drives the hollow auger 309 to rotate. When the soil enters the auger housing I 311, the rotation of the auger 4102 pushes the soil spiral downwards. At the same time, the nozzle 305 above the hollow auger 309 continuously sprays leaching liquid onto the soil. The motor II 306 drives the drive shaft IV 307 to rotate, which in turn drives the mixing mechanism I 308 to mix the soil with the leaching liquid. During the downward movement of the soil, the mixing mechanism I 308 mixes and stirs the moist soil, achieving simultaneous conveying, spraying, and mixing. The incoming soil is then grouped and processed by multiple sets of leaching and mixing mechanisms 15, thereby significantly enhancing the contact efficiency and mixing uniformity between the leaching liquid and soil particles.

[0062] The stirring mechanism I 308 includes a helical gear VII 3101, a helical gear VIII 3102, a drive shaft V 3103, and a stirring rod 3104. The helical gear VII 3101 is mounted on the drive shaft IV 307, and meshes with the helical gear VIII 3102. The helical gear VIII 3102 is mounted on the drive shaft V 3103, which passes through the hollow auger 309 and rotates with it. The stirring rod 3104 is mounted on the drive shaft V 3103. The rotation of the drive shaft V 307 drives the helical gear VII 3101 to rotate. The helical gear VII 3101 meshes with the helical gear VIII 3102, which drives the drive shaft V 3103 to rotate. The drive shaft V 3103 drives the stirring rod 3104 to rotate, and the stirring rod 3104 mixes the sprayed soil inside the auger 4102.

[0063] The maintenance mechanism 21 includes a helical gear II 201, a drive shaft II 202, a clutch mechanism 203, an operating lever 208, a sealing cover plate 211, and a positioning plate III 212. The helical gear II 201 meshes with the helical gear I 20. The helical gear II 201 is mounted on the drive shaft II 202, which passes through and is rotatably connected to the cover plate 17. The clutch mechanism 203 is located at the rear end of the drive shaft II 202, and a helical gear III 204 is located at the rear end of the clutch mechanism 203. The helical gear III 204 meshes with the helical gear VI 301. A drive shaft III 205 is located above the clutch mechanism 203 and is rotatably connected to the positioning plate III 212. A helical gear IV 206 is also present. Placed on the drive shaft Ⅲ205, helical gear Ⅳ206 meshes with helical gear ⅩV207. Helical gear ⅩV207 is set on the operating rod 208. The operating rod 208 passes through the cover plate 17 and is rotatably connected to the cover plate 17. The drive shaft Ⅲ205 is also provided with gear Ⅰ209, which meshes with rack 210. Rack 210 is fixed to one end of sealing cover plate 211. Gear Ⅰ209, rack 210, and sealing cover plate 211 are also set inside the connecting plate Ⅰ14. Sealing cover plate 211 and connecting plate Ⅰ14 are slidably connected by a keyway. Sealing cover plate 211 is also set above the auger housing Ⅰ311. The circular opening on sealing cover plate 211 matches the opening on the upper part of auger housing Ⅰ311.

[0064] The clutch mechanism 203 includes a swing plate 2101, a lever 2102, a sliding disk 2103, an annular guide groove 2104, a guide shaft 2105, a coupling slider I 2106, a connecting shaft 2107, and a coupling slider II 2108. The swing plate 2101 is located below the drive shaft III 205. One end of the swing plate 2101 is provided with a lever 2102, which is also located in a groove on the side of the sliding disk 2103. An annular guide groove 2104 is fixed in the middle of the sliding disk 2103 and is located on the guide shaft. The guide shaft 2105 is slidably connected to the guide shaft 2105 via a keyway. The guide shaft 2105 is fixed on the transmission shaft II 202. The rear end of the sliding disk 2103 is fixed with a coupling slider I 2106. A connecting shaft 2107 is fixed on the coupling slider I 2106. The connecting shaft 2107 is also set in the groove in the middle of the coupling slider II 2108 and is slidably connected to the coupling slider II 2108. The protruding teeth and grooves on the end faces of the coupling slider I 2106 and the coupling slider II 2108 mesh with each other. Through the contact of the tooth surfaces, the torque can be transmitted from one slider to another.

[0065] When the crushed soil enters the washing and mixing mechanism 15 through the receiving trough 13, the motor I 18 drives the transmission shaft I 19 to rotate, which in turn drives the helical gear I 20 to rotate. The helical gear I 20 meshes with the helical gear II 201 of the maintenance mechanism 21, which in turn drives the transmission shaft II 202 to rotate. The transmission shaft II 202 then drives the clutch mechanism 203 to rotate. The clutch mechanism 203 meshes with the coupling slider I 2106 and the coupling slider II 2108, which in turn drives the helical gear III 204 to rotate. The helical gear III 204 meshes with the helical gear VI 301, which in turn drives the hollow auger 309 to transport the soil downwards. The washing and mixing mechanism 15 operates normally. When a certain set of washing and mixing mechanisms 15 malfunctions, the operating lever 208 is manually rotated counterclockwise. The operating lever 208 drives the helical gear V 207 to rotate. Rotation causes helical gear V207 to mesh with helical gear IV206, which in turn drives transmission shaft III205 to rotate. Transmission shaft III205 then drives gear I209 to rotate, which meshes with rack 210. Rack 210 causes sealing cover 211 to move backward, closing the opening on the leaching mixing mechanism 15 and stopping soil from entering. Simultaneously, transmission shaft III205 rotates, causing swing plate 2101 to swing. Swing plate 2101 causes sliding disk 2103 to move towards transmission shaft II202, which in turn causes coupling slider I2106 to move towards transmission shaft II202. Coupling slider I2106 and coupling slider II2108 disengage and stop meshing, and coupling slider II2108 stops moving. Helical gears III204 and VI301 also stop moving. When the rinsing and mixing mechanism 15 loses power and stops working, the inspection plate 1701 on the cover plate 17 is opened to carry out inspection and maintenance work on the malfunctioning rinsing and mixing mechanism 15. Through the inspection mechanism 21, while a single mechanism is shut down for maintenance, other rinsing and mixing mechanisms 15 continue to operate normally, and the overall production efficiency of the system is not affected. This maintenance mode effectively avoids the production loss of a complete shutdown and improves the availability and continuity of the system.

[0066] The mixing mechanism 23 includes a motor III 401, connecting rod I 402, connecting frame 403, sliding rod 404, positioning plate IV 410, stirring mechanism II 413, dispensing mechanism 415, motor IV 416, positioning plate V 418, and stirring claw 420. The motor III 401 is fixed to the outer wall of the mixing box 24. The output end of the motor III 401 is connected to connecting rod I 402. There are four sets of connecting rod I 402. The other connecting rods I 402 are rotatably connected to the mixing box 24 inside the mixing box 24. The four sets of connecting rods I 402 are rectangularly distributed. A connecting frame 403 is provided between two adjacent sets of connecting rods I 402. A sliding rod 404 is fixed on 403, and a connecting plate II 405 is provided on the sliding rod 404. The connecting plate II 405 is slidably connected to the sliding rod 404. A limiting shaft III 406 is fixed on one side of the connecting plate II 405. The limiting shaft III 406 is also set in the groove I 2401 on the mixing box 24 and is slidably connected to the mixing box 24. At the same time, a connecting rod II 414 is provided at one end of the connecting plate II 405. A material spreading mechanism 415 is provided between the connecting rods II 414. A driven shaft 408 is provided at the lower end of the connecting rod I 402. Helical gears IX 407 are provided at both ends of the driven shaft 408. Helical gears IX 407 mesh with helical gears X 409. Helical gear X409 is mounted on drive shaft VI411, which is rotatably connected to positioning plate IV410. A protective cover II423 is also fixed to positioning plate IV410. Helical gear IX407, driven shaft 408, and helical gear X409 are all housed inside protective cover II423. A drive belt I412 is located at the other end of drive shaft VI411, connecting drive shaft VI411 to stirring mechanism II413 via drive belt I412. The drive belts I412 on both sides are symmetrically arranged. Multiple stirring mechanisms are connected via drive belts I412. A connecting cover 422 is fixed to the positioning plate. At one end of plate IV 410, transmission belt I 412 is located inside the connecting cover 422. At the other end of the connecting cover 422, there is a positioning plate V 418. Motor mounting plate 417 is fixed on the positioning plate V 418. Motor IV 416 is fixed on the motor mounting plate 417. The output end of motor IV 416 is connected to stirring claw 420. Stirring claw 420 is also located below the positioning plate V 418 and rotatably connected to the positioning plate V 418. Multiple sets of stirring claws 420 are connected to each other through transmission belt II 419. Protective cover I 421 is fixed on the positioning plate V 418. All transmission belts II 419 are located inside the protective cover I 421.Motor III 401 drives connecting rod I 402 to rotate, connecting rod I 402 drives connecting frame 403 to swing, connecting frame 403 drives positioning plate IV 410 and driven shaft 408 to swing, helical gear X 409 meshes with helical gear IX 407, when connecting frame 403 swings, helical gear IX 407 rotates in a circle around helical gear X 409, helical gear IX 407 drives transmission shaft VI 411 to rotate, transmission shaft VI 411 drives multiple sets of stirring mechanisms II 413 to rotate through transmission belt I 412, the transmission shaft VI 411 and transmission belt I 412 on both sides are symmetrically distributed to ensure that the stirring mechanisms II 413 on both sides rotate in opposite directions, enhancing the lateral stirring effect, when connecting frame 403 swings, it also drives sliding rod 404 to swing. The connecting plate II 405 is driven, and simultaneously limited by the limiting shaft III 406. The sliding rod 404 drives the connecting plate II 405 to reciprocate linearly along the sliding groove I 2401. The connecting plate II 405 drives the connecting rod II 414 and the spreading mechanism 415 to reciprocate linearly. While the spreading mechanism 415 is reciprocating linearly, it spreads the desiccant and remediation agent into the mixing box 24. At the same time, the motor IV 416 drives the stirring claw 420 to rotate through the transmission belt II 419. The stirring mechanism II 413 and the stirring claw 420 cooperate to mix and stir the soil in the mixing box 24. When the connecting frame 403 swings forward, it drives the soil forward and pushes the soil out of the mixing box 24, completing the soil remediation operation.

[0067] The spreading mechanism 415 includes a motor V4101, an auger 4102, and an auger housing II4103. The auger housing II4103 is fixed on the connecting rod II414. There are two sets of motor V4101 and auger 4102, both of which are located inside the auger housing II4103. The output end of motor V4101 is connected to auger 4102. Motor V4101 controls the rotation of auger 4102, and the rotation of auger 4102 spreads the desiccant and repair agent into the mixing box 24.

[0068] The mixing mechanism II 413 includes a drive shaft VIII 4301, a cross-shaped plate 4302, and mixing blades 4303. The drive shaft VIII 4301 is rotatably connected to the positioning plate IV 410 between the two plates. The cross-shaped plate 4302 is mounted on the drive shaft VIII 4301, and the mixing blades 4303 are positioned between the cross-shaped plates 4302. The rotation of the drive shaft VIII 4301 drives the cross-shaped plate 4302 to rotate, which in turn drives the mixing blades 4303 to rotate. The mixing blades 4303 then perform transverse mixing of the soil in the mixing bin 24.

[0069] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0070] In the description of this invention, the connection methods are divided into fixed connection and movable connection. Fixed connection methods include, but are not limited to, welding and bolting; movable connection methods include, but are not limited to, sliding connection, rotating connection and threaded connection. The connection method to achieve the desired effect should be selected according to the application of the solution.

[0071] In summary, the power systems, including but not limited to motors, electric actuators, and their respective transmission systems, are equipped with protective covers adapted to the actual installation location, and sealing rings are adapted to the relative rotational connections to prevent wear or damage to the power and transmission systems caused by the external environment, thereby further ensuring the normal operation of the power and transmission systems.

[0072] In summary, the electronic or electrical components, including but not limited to motors and electric actuators, are existing components that are custom-made or purchased. The electrical connections between these components are conventional circuit or electrical connections in the prior art and are not within the scope of protection of this invention. Furthermore, each component operates through an external power supply.

[0073] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. A device for in-situ leaching and recycling remediation of organically contaminated soil, characterized in that... The specific repair methods are as follows: 1) Soil collection: Using a soil excavator and conveyor belt, the contaminated soil is transported to the crushing and screening mechanism above the device. The soil excavator and conveyor belt are controlled to send the contaminated soil into the device at a rate of 2-5 tons / hour. 2) Crushing and Vibrating Screening: The crushing roller crushes large nodular soil particles. Impurities that cannot be crushed, such as stones, branches, and garbage, are separated from the soil through the crushing and screening mechanism. Under the vibration of the crushing and screening mechanism, the particles enter the gravel collection box on the side of the device. After crushing and screening, the soil particles passing through the screen plate are uniform in size to meet the requirements of subsequent leaching. 3) Leaching Remediation: After passing through the crushing and screening mechanism, the soil enters the leaching and mixing mechanism. The hollow auger is controlled to rotate downwards at a speed of 5-10 rpm, ensuring that the soil residence time in the hollow auger is 2-4 minutes. The nozzles located at the top of the hollow auger spray the leaching agent at a pressure of 15-35 kPa. The leaching agent selected is 1% polysorbate-80 remediation solution, which can effectively treat most hydrophobic organic pollutants, such as petroleum hydrocarbons (TPH), polycyclic aromatic hydrocarbons (PAHs), chlorinated solvents (CE, TCE), pesticides, etc. At the same time, the multiple sets of stirring mechanisms I in the hollow auger are controlled to stir and mix the moist soil at a rate of 20-30 rpm, thus completing the three operations of conveying, spraying and stirring simultaneously in a continuous process, enhancing work efficiency. 4) Chemical addition: After the soil is washed and mixed by the leaching and mixing mechanism, it enters the mixing tank. The spreading mechanism on the mixing mechanism spreads the chemicals evenly back and forth on the mud. Quicklime, hydrated lime or calcium carbonate and other neutralizing and drying agents are added to neutralize the acidic environment after leaching and adjust the soil pH to neutral or slightly alkaline. Then, stabilizing agents such as phosphate, sulfide or biochar are added to further reduce the activity of residual organic matter or metals. 5) Mixing: While applying the medicine, control motor III in the mixing mechanism to drive connecting rod I to rotate. Control the mixing mechanism II and the mixing claw to swing forward through the connecting frame, pushing the mixed material slowly and steadily towards the discharge port at a speed of 0.1-0.3 m / min. Ensure that the mixed material stays in the mixing box for 10-20 minutes. The mixing mechanism II in the mixing mechanism performs transverse mixing of the mixed material in the mixing box, controlling the mixing speed to 20-40 rpm. The mixing claw performs longitudinal mixing of the mixed material in the mixing box, controlling the mixing speed to 30-50 rpm.

2. An in-situ leaching and recycling remediation device for organically contaminated soil, comprising a crushing and screening mechanism, a crushed stone collection box, a receiving trough, a leaching and mixing mechanism, a motor I, a maintenance mechanism, a water pump, a mixing mechanism, a mixing tank, an installation platform, a planer, and a conveyor belt; characterized in that... The installation platform is located below the overall device, and the excavator is located at the front end of the overall device. A conveyor belt is located behind the excavator, and a crushing and screening mechanism is located behind the conveyor belt. A crushed stone collection box is located on one side of the crushing and screening mechanism, and a receiving trough is located below the crushing and screening mechanism. A connecting plate I is located below the receiving trough and is fixed to the support platform I. A washing and mixing mechanism is located below the connecting plate I. A cover plate is located at the front end of the support platform I, and a maintenance plate is located on the cover plate. A motor I is fixed to the outside of the cover plate, and the output end of the motor I is connected to a drive shaft I. Multiple sets of helical gears I are located on the drive shaft I. The helical gears I are connected to the maintenance mechanism, which also cooperates with the washing and mixing mechanism. A water pump is located outside the support platform I, and a mixing box is located at the rear end of the washing and mixing mechanism. The mixing mechanism is located inside the mixing box.

3. The in-situ leaching and recycling remediation device for organically contaminated soil according to claim 2, characterized in that... The rinsing and mixing mechanism includes a helical gear VI, a base, a rotary connector, a motor II, a stirring mechanism I, a hollow auger, and an auger housing I. The helical gear VI is mounted on the base, and the rotary connector and motor II are located inside the base. A water pipe is connected to a water pump through the rotary connector, and a nozzle is mounted on the water pipe. The motor II is connected to a circuit through the rotary connector, and the output end of the motor II is connected to a drive shaft IV. The stirring mechanism I is mounted on the drive shaft IV. The hollow auger is fixed on the base, and a top plate is provided on the upper part of the hollow auger. The water pipe and drive shaft IV are located inside the hollow auger, and the nozzle and stirring mechanism I are located outside the hollow auger. An auger housing I is located outside the hollow auger and is fixed inside a support platform I. The stirring mechanism I includes a helical gear VII, a helical gear VIII, a drive shaft V, and a stirring rod; the helical gear VII is mounted on the drive shaft IV, the helical gear VII meshes with the helical gear VIII, the helical gear VIII is mounted on the drive shaft V, the drive shaft V passes through a hollow auger and is rotatably connected to the hollow auger, and the stirring rod is mounted on the drive shaft V.

4. The in-situ leaching and recycling remediation device for organically contaminated soil according to claim 2, characterized in that... The mixing mechanism includes a motor III, connecting rod I, a connecting frame, a sliding rod, a positioning plate IV, a stirring mechanism II, a dispensing mechanism, a motor IV, a positioning plate V, and stirring claws. The motor III is fixed to the outer wall of the mixing tank. The output end of the motor III is connected to connecting rod I. There are four sets of connecting rods I. Other connecting rods I are located inside the mixing tank and rotatably connected to it. The four sets of connecting rods I are arranged in a rectangular pattern. A connecting frame is provided between two adjacent sets of connecting rods I. A sliding rod is fixed on the connecting frame, and a connecting plate II is provided on the sliding rod. The connecting plate II is slidably connected to the sliding rod. A limit shaft III is fixed on one side of the connecting plate II. The limit shaft III is also located in a groove I on the mixing tank and slidably connected to it. A connecting rod II is provided at one end of the connecting plate II. A dispensing mechanism is provided between the connecting rods II. A driven shaft is provided at the lower end of the connecting rod I. Helical gears IX are provided at both ends of the driven shaft. Helical gears IX mesh with helical gear X. The drive shaft VI is positioned on the drive shaft VI, which is rotatably connected to the positioning plate IV. A protective cover II is also fixed on the positioning plate IV. Helical gear IX, driven shaft, and helical gear X are all housed inside the protective cover II. A drive belt I is located at the other end of the drive shaft VI, connecting the drive shaft VI to the stirring mechanism II via the drive belt I. The drive belts I on both sides are symmetrically arranged. Multiple stirring mechanisms are connected via the drive belts I. A connecting cover is fixed to one end of the positioning plate IV, with all drive belts I located inside the connecting cover. A positioning plate V is located at the other end of the connecting cover. A motor mounting plate is fixed to the positioning plate V, and motor IV is fixed to the motor mounting plate. The output end of motor V is connected to the stirring claw, which is also rotatably connected to the positioning plate V from below. Multiple stirring claws are interconnected via the drive belts II. The protective cover I is fixed to the positioning plate V, and all drive belts II are located inside the protective cover I.

5. The in-situ leaching and recycling remediation device for organically contaminated soil according to claim 4, characterized in that... The material spreading mechanism includes a motor V, an auger, and an auger housing II; the auger housing II is fixed on the connecting rod II, and there are two sets of motor V and auger, both of which are located inside the auger housing II, with the output end of motor V connected to the auger.

6. The in-situ leaching and recycling remediation device for organically contaminated soil according to claim 4, characterized in that... The stirring mechanism II includes a drive shaft VIII, a cross-shaped plate, and stirring blades; the drive shaft VIII is rotatably connected to the positioning plates IV between them, the cross-shaped plate is mounted on the drive shaft VIII, and the stirring blades are mounted between the cross-shaped plates.

7. The in-situ leaching and recycling remediation device for organically contaminated soil according to claim 2, characterized in that... The maintenance mechanism includes a helical gear II, a transmission shaft II, a clutch mechanism, an operating lever, a sealing cover, and a positioning plate III. The helical gear II meshes with helical gear I. Helical gear II is mounted on the transmission shaft II, which passes through the cover and is rotatably connected to it. A clutch mechanism is located at the rear end of the transmission shaft II, and a helical gear III is located at the rear end of the clutch mechanism. Helical gear III meshes with helical gear VI. The transmission shaft III is located above the clutch mechanism and is rotatably connected to the positioning plate III. Helical gear IV is mounted on the transmission shaft III and meshes with helical gear V. Helical gear V is mounted on the operating lever, which passes through the cover and is rotatably connected to it. Gear I is also mounted on the transmission shaft III and meshes with a rack. The rack is fixed to one end of the sealing cover. Gear I, the rack, and the sealing cover are also located inside the connecting plate I. The sealing cover and the connecting plate I are slidably connected by a keyway. The sealing cover is also located above the auger housing I, and the circular opening on the sealing cover matches the opening on the upper part of the auger housing I.

8. The in-situ leaching and recycling remediation device and method for organically contaminated soil according to claim 7, characterized in that... The clutch mechanism includes a swing plate, a lever, a sliding disk, an annular guide groove, a guide shaft, a coupling slider I, a connecting shaft, and a coupling slider II. The swing plate is located at the lower part of the transmission shaft III. One end of the swing plate is equipped with a lever, which is also located in a groove on the side of the sliding disk. An annular guide groove is fixed in the middle of the sliding disk. The annular guide groove is located on the guide shaft and is slidably connected to the guide shaft via a keyway. The guide shaft is fixed on the transmission shaft II. The rear end of the sliding disk is fixed with a coupling slider I. A connecting shaft is fixed on the coupling slider I. The connecting shaft is also located in a groove in the middle of the coupling slider II and is slidably connected to the coupling slider II. The teeth and grooves on the end faces of the coupling slider I and the coupling slider II mesh with each other, and the torque can be transmitted from one slider to the other through the contact of the tooth surfaces.

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