A device and method for in-situ ex-situ crushing and mixing of contaminated soil

Abstract

The application discloses a kind of contaminated soil in situ heterotopic broken mixing equipment and construction method, including broken box, repair box and mixing box, the broken and screening work of contaminated soil is carried out in the contaminated soil collection place by broken box, and under the action of first conveying belt and second conveying belt, contaminated soil is sequentially conveyed to the repair box away from contaminated soil collection place to add repair agent and is conveyed to mixing box to carry out stirring mixing, realize heterotopic mixing repair;Wherein, in repair box, the contaminated soil after initial crushing can be scattered by vibration plate, to avoid the aggregation of contaminated soil, to facilitate the uniform distribution of repair agent on the contaminated soil, stirring comb and receiving comb are installed in mixing cylinder, with the rotation of stirring comb, the material is stirred, so that contaminated soil and repair agent are mixed more evenly, and through the cooperation of stirring comb and receiving comb, when stirring comb passes through receiving comb, it can be cut again Shear broken, improve the broken mixing effect.

Description

Technical Field

[0001] This invention relates to the field of soil remediation technology, specifically to an in-situ crushing and mixing device and construction method for contaminated soil. Background Technology

[0002] With increasingly stringent requirements for site environment, the importance of contaminated soil remediation has become increasingly significant. In existing technologies, the in-situ remediation process involves crushing and screening the excavated soil, using a loader to spread the screened soil in layers within the foundation pit, leveling it, and then evenly spreading the remediation agent on the soil surface while simultaneously rotary tilling and mixing it. This process requires a large amount of manpower, and the mixing effect between the remediation agent and the soil is poor when using a single crusher, making it difficult to achieve good mixing uniformity and thus reducing the remediation effect. Therefore, there is an urgent need for an in-situ crushing and mixing equipment and construction method for contaminated soil to solve the above problems. Summary of the Invention

[0003] This invention provides a simple-to-operate, in-situ crushing and mixing device and construction method for contaminated soil that can improve the mixing effect of remediation agents and soil, and further enhance the soil remediation effect. It solves the problems of time-consuming, labor-intensive, and difficult-to-achieve good mixing uniformity in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an in-situ ex-situ crushing and mixing device for contaminated soil, comprising a crushing box, a remediation box, and a mixing box, as well as a first conveyor belt connecting the crushing box and the remediation box and a second conveyor belt connecting the remediation box and the mixing box;

[0005] The crushing box includes a feed hopper, a crusher connected to the discharge port of the feed hopper, and a drum screen connected to the discharge port of the crusher. One end of the first conveyor belt is located below the drum screen.

[0006] The repair box includes a vibrating plate and a repair agent storage box. A driving mechanism is installed on the vibrating plate to control the vibrating plate to vibrate. The vibrating plate is located between the other end of the first conveyor belt and one end of the second conveyor belt. The contaminated soil is transported from the first conveyor belt to the vibrating plate and then falls onto the second conveyor belt after being dispersed by the vibrating plate. The repair agent storage box is located above the second conveyor belt. A material feeding mechanism is installed at the outlet of the repair agent storage box to control the repair agent in the repair agent storage box to fall onto the second conveyor belt.

[0007] The mixing chamber includes a mixing cylinder, the inlet of which is connected to the other end of the second conveyor belt to receive the material conveyed by the second conveyor belt. The mixing cylinder includes at least two stirring combs and one receiving comb. Each stirring comb moves in a circular motion around the axis of the mixing cylinder, wherein adjacent stirring combs are staggered. The receiving comb is slidably installed along the axis of the mixing cylinder, and a first linkage is installed on the receiving comb. As the stirring combs rotate, the receiving comb is driven to slide through the first linkage, allowing the corresponding stirring comb to pass through the receiving comb.

[0008] Preferably, the crusher includes a crushing cylinder and a pair of opposing rotating crushing rollers located inside the crushing cylinder. The feed inlet of the crushing cylinder is connected to the discharge outlet of the feed hopper. The drum screener includes a screening drum and a first drive motor. The feed inlet of the screening drum is connected to the discharge outlet of the crushing cylinder. The first drive motor controls the screening drum to rotate. The screened contaminated soil passes through the screening drum and falls onto the first conveyor belt.

[0009] Preferably, the other end of the first conveyor belt, the vibrating plate, and one end of the second conveyor belt are distributed from top to bottom, and the driving mechanism includes a second drive motor, which controls the vibrating plate to generate vibration.

[0010] Preferably, a receiving plate is installed between the vibrating plate and the first transmission end to guide the contaminated soil to slide onto the vibrating plate, and a plurality of vibration springs are evenly installed at the bottom of the receiving plate. As the contaminated soil falls onto the receiving plate, it causes the receiving plate to compress the vibration springs and move.

[0011] The material feeding mechanism includes a material feeding roller located at the outlet of the repair agent storage tank. The material feeding roller has at least one material feeding groove. As the material feeding roller rotates, the repair agent is obtained from the repair agent storage tank through the material feeding groove and sprinkled onto the second conveyor belt.

[0012] A second linkage component is installed on the receiving plate. As the receiving plate moves, the material feeding roller is driven to rotate through the second linkage component.

[0013] Preferably, the second linkage includes a guide rod arranged along the moving direction of the receiving plate; a movable block sleeved on the guide rod, wherein the movable block is connected to the receiving plate and moves with the receiving plate, thereby driving the movable block to move along the guide rod; a rotating wheel, wherein a connecting rod is eccentrically arranged on one side of the rotating wheel, wherein both ends of the connecting rod are hinged to the rotating wheel and the movable block respectively, and moves with the movable block, thereby driving the rotating wheel to rotate; and a first rotating shaft coaxially arranged with the rotating wheel, wherein a first pulley is mounted on the first rotating shaft;

[0014] A second rotating shaft is coaxially mounted on the feeding roller, and a second pulley is mounted on the second rotating shaft. A linkage belt is sleeved between the first pulley and the second pulley.

[0015] Preferably, a guide plate is provided between the receiving plate and the vibrating plate, and both ends of the guide plate are hinged to the receiving plate and the vibrating plate, respectively.

[0016] Preferably, a slide rail is installed inside the mixing cylinder along its axial direction, and a slider is installed on the receiving comb tooth at a position corresponding to the slide rail, and the slider is slidably installed on the slide rail;

[0017] The first linkage component includes a protrusion located at one end of the slide rail, a linkage gear connected to the center of the protrusion, and a plurality of return springs installed between the other end of the slide rail and the receiving comb teeth. As the linkage gear rotates, the protrusion rotates, moves closer to the receiving comb teeth, and pushes the receiving comb teeth to move along the slide rail to compress the return springs, or move away from the receiving comb teeth. Under the action of the return springs, the receiving comb teeth are reset.

[0018] Each of the agitator comb teeth has an arc-shaped rack installed on one side of its rotation direction. As the agitator comb teeth rotate, the arc-shaped rack meshes with the linkage gear and drives the linkage gear to rotate.

[0019] Preferably, elastic strips are installed at both ends of the receiving comb teeth to cover the gaps generated when the receiving comb teeth slide.

[0020] Preferably, the mixing cylinder is inclined, and an inclined plate is installed at the inlet of the mixing cylinder to receive the material conveyed by the second conveyor belt. A third conveyor belt is installed at the outlet of the mixing cylinder to convey the mixed material.

[0021] A construction method for an in-situ crushing and mixing device for contaminated soil includes the following steps:

[0022] S1. Set the crushing box at the contaminated soil collection point, and the collected contaminated soil enters the feed hopper;

[0023] S2. Start the crusher and drum screener to crush and screen the contaminated soil. The discharged contaminated soil is conveyed to the remediation box by the first conveyor belt.

[0024] S3. Start the drive mechanism to control the vibrating plate to vibrate, disperse the contaminated soil, and guide it to the second conveyor belt. At the same time, start the material feeding mechanism to control the remediation agent in the remediation agent storage tank to be sprayed onto the dispersed contaminated soil and conveyed to the mixing tank by the second conveyor belt.

[0025] S4. The mixing drum operates by controlling the rotation of the stirring comb to stir and mix the materials inside the mixing drum. At the same time, the stirring comb and the receiving comb act to perform secondary crushing of the materials. The mixed and crushed materials slide out from the discharge port of the mixing drum, and samples are taken from the discharge port of the mixing drum. Among them, unqualified materials are transported to the first conveyor belt.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. In this invention, the contaminated soil is crushed and screened at the collection point using a crushing box, and then conveyed sequentially to a remediation box far from the collection point by a first conveyor belt and a second conveyor belt for adding remediation agent and to a mixing box for stirring and mixing, thereby achieving ex-situ mixing remediation.

[0028] In addition, the vibrating plate inside the remediation chamber can disperse the contaminated soil after the initial crushing, preventing the soil from accumulating and facilitating the even distribution of the remediation agent on the soil. The mixing drum is equipped with stirring combs and receiving combs. As the stirring combs rotate, they agitate the material, resulting in a more uniform mixture of contaminated soil and remediation agent. Through the cooperation of the stirring and receiving combs, the material is further sheared and crushed as the stirring combs pass through the receiving combs, improving the crushing and mixing effect. Adjacent stirring combs are staggered, and as the stirring combs rotate, the receiving combs move, crushing the material along multiple paths, further enhancing the crushing and mixing effect.

[0029] 2. In this invention, a receiving plate is installed inside the repair box between the first conveyor belt and the vibrating plate. Under the action of the second linkage, the receiving plate can be linked with the feeding roller. As the contaminated soil falls onto the receiving plate, it drives the receiving plate to compress the vibration spring. Under the action of the second linkage, the feeding roller is driven to rotate to perform feeding work. The system automatically detects whether there is material on the first conveyor belt, thus avoiding waste of the repair agent. Attached Figure Description

[0030] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0031] In the attached diagram:

[0032] Figure 1 This is a schematic diagram of the structure of the off-site crushing and mixing equipment of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of the vibration plate and the receiving plate of the present invention;

[0034] Figure 3 This is a side view of the vibrating plate and the receiving plate of the present invention;

[0035] Figure 4 This is a schematic diagram of the mixing cylinder of the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of the stirring comb teeth and the receiving comb teeth of the present invention;

[0037] Figure 6 This is a schematic diagram of the structure of the comb tooth receiving device of the present invention;

[0038] Labels in the diagram: 1. Crushing box; 2. Repair box; 3. Mixing box; 4. First conveyor belt; 5. Second conveyor belt; 6. Feed hopper; 7. Crushing cylinder; 8. Crushing roller; 9. Screening roller; 10. First drive motor; 11. Vibrating plate; 12. Repair agent storage box; 13. Receiving plate; 14. Vibration spring; 15. Feeding roller; 16. Feeding groove; 17. Guide rod; 18. Movable block; 19. Rotary wheel; 20. Connecting rod; 21. First rotating shaft; 22. First belt 23. Wheel; 24. Second shaft; 25. Second pulley; 26. Linkage belt; 27. Guide plate; 28. Mixing cylinder; 29. ​​Stirring comb; 30. Receiving comb; 31. Slide rail; 32. Slider; 33. Protrusion; 34. Linkage gear; 35. Return spring; 36. Arc rack; 37. Elastic strip; 38. Inclined plate; 39. Third transmission belt; 40. Second drive motor; 41. Rotating ring; 42. Driven gear; 43. Mixing motor; 44. Drive gear. Detailed Implementation

[0039] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0040] Example: Figure 1As shown, an in-situ ex-situ crushing and mixing device for contaminated soil includes a crushing box 1, a remediation box 2, and a mixing box 3, as well as a first conveyor belt 4 connecting the crushing box 1 and the remediation box 2 and a second conveyor belt 5 connecting the remediation box 2 and the mixing box 3. The crushing box 1 includes a feed hopper 6, a crusher connected to the discharge port of the feed hopper 6, and a drum screen connected to the discharge port of the crusher. One end of the first conveyor belt 4 is located below the drum screen. The remediation box 2 includes a vibrating plate 11 and a remediation agent storage tank 12. A drive mechanism is installed on the vibrating plate 11 to control its vibration. The vibrating plate 11 is located between the other end of the first conveyor belt 4 and one end of the second conveyor belt 5. The contaminated soil is conveyed from the first conveyor belt 4 to the vibrating plate 11 and, after being shaken by the vibrating plate 11, falls onto the second conveyor belt 5. The remediation agent storage tank 1... 2 is located above the second conveyor belt 5, and a feeding mechanism is installed at the discharge port of the repair agent storage tank 12 to control the repair agent in the repair agent storage tank 12 to fall onto the second conveyor belt 5; the mixing tank 3 includes a mixing cylinder 27, the inlet of the mixing cylinder 27 is connected to the other end of the second conveyor belt 5, and is used to receive the material conveyed by the second conveyor belt 5. The mixing cylinder 27 includes at least two stirring combs 28 and one receiving comb 29. Each stirring comb 28 moves in a circular motion around the axis of the mixing cylinder 27, wherein two adjacent stirring combs 28 are staggered. The receiving comb 29 is slidably installed along the axis of the mixing cylinder 27, and a first linkage is installed on the receiving comb 29. As the stirring comb 28 rotates, the first linkage drives the receiving comb 29 to slide, so that the corresponding stirring comb 28 passes through the receiving comb 29.

[0041] Among them, reference Figure 1 As shown, in the crushing box 1, the crusher includes a crushing cylinder 7 and a pair of opposing rotating crushing rollers 8 located inside the crushing cylinder 7. The feed inlet of the crushing cylinder 7 is connected to the discharge outlet of the feed hopper 6. The drum screener includes a screening drum 9 and a first drive motor 10. The feed inlet of the screening drum 9 is connected to the discharge outlet of the crushing cylinder 7. The first drive motor 10 can control the rotation of the screening drum 9 through gear transmission or belt transmission. The screened contaminated soil passes through the screening drum 9 and falls onto the first conveyor belt 4, and is transported to the remediation box 2 along with the first conveyor belt 4.

[0042] In the crushing process, contaminated soil enters the crushing cylinder 7 through the feed hopper 6, is sheared and crushed by two crushing rollers 8, and falls into the screening drum 9. The screening drum 9 rotates to screen the soil, and large particles of contaminated soil slide out along the discharge port of the screening drum 9. Qualified contaminated soil passes through the screening drum 9 and falls onto the first conveyor belt 4.

[0043] refer to Figure 1As shown, the other end of the first conveyor belt 4, the vibrating plate 11, and one end of the second conveyor belt 5 are distributed from top to bottom. Contaminated soil falls onto the vibrating plate 11 from the end of the first conveyor belt 4. The driving mechanism includes a second drive motor 39, which is a vibration motor. Based on its excitation principle, it controls the vibrating plate 11 to vibrate. (The reference is missing from the original text.) Figure 2-3 As shown, a receiving plate 13 is installed between the vibrating plate 11 and the first transmission end to guide the contaminated soil to slide onto the vibrating plate 11. Several vibration springs 14 are evenly installed at the bottom of the receiving plate 13. As the contaminated soil falls onto the receiving plate 13, it causes the receiving plate 13 to compress the vibration springs 14 and move. The material feeding mechanism includes a feeding roller 15 located at the outlet of the repair agent storage tank 12. The feeding roller 15 has at least one feeding groove 16. As the feeding roller 15 rotates, it obtains repair agent from the repair agent storage tank 12 through the feeding groove 16 and sprinkles it onto the second transmission belt 5. A second linkage is installed on the receiving plate 13. As the receiving plate 13 moves, the second linkage drives the feeding roller 15 to rotate.

[0044] refer to Figure 2 As shown, in this embodiment, the second linkage includes a guide rod 17 arranged along the moving direction of the receiving plate 13, the guide rod 17 being fixed inside the repair box 2; a movable block 18 sleeved on the guide rod 17, wherein the movable block 18 is connected to the receiving plate 13 and moves with the receiving plate 13, thereby driving the movable block 18 to move along the guide rod 17; a rotating wheel 19, wherein a connecting rod 20 is eccentrically arranged on one side of the rotating wheel 19, wherein both ends of the connecting rod 20 are hinged to the rotating wheel 19 and the movable block 18 respectively, and moves with the movable block 18, thereby driving the rotating wheel 19 to rotate; a first rotating shaft 21 coaxially arranged with the rotating wheel 19, wherein a first pulley 22 is mounted on the first rotating shaft 21; a second rotating shaft 23 coaxially mounted on the feeding roller 15, wherein a second pulley 24 is mounted on the second rotating shaft 23, and a linkage belt 25 is sleeved between the first pulley 22 and the second pulley 24.

[0045] refer to Figure 2-3 As shown, a guide plate 26 is provided between the receiving plate 13 and the vibrating plate 11. Both ends of the guide plate 26 are hinged to the receiving plate 13 and the vibrating plate 11 respectively. As the receiving plate 13 moves, the guide plate 26 swings around the hinge, ensuring that the receiving plate 13 and the vibrating plate 11 are seamlessly connected, and ensuring that the contaminated soil can move onto the vibrating plate 11.

[0046] In the remediation process, the crushed contaminated soil is conveyed by the first conveyor belt 4 and falls onto the receiving plate 13, causing the receiving plate 13 to compress the vibration spring 14 and move. The contaminated soil slides along the receiving plate 13, passes the guide plate 26, and falls onto the vibrating plate 11. As the vibrating plate 11 vibrates, the contaminated soil is dispersed. At the same time, due to the movement of the receiving plate 13, the rotating wheel 19 rotates, which in turn drives the first rotating shaft 21 and the second rotating shaft 23 to rotate, thereby driving the feeding roller 15 to rotate. As the feeding roller 15 rotates, the feeding trough 16 is controlled to enter the remediation agent storage box 12 to retrieve the material. After the feeding trough 16 rotates out of the remediation agent storage box 12, the remediation agent is evenly scattered on the contaminated soil on the second conveyor belt 5 and transported synchronously with the contaminated soil. When there is no contaminated soil on the first conveyor belt 4, that is, when no contaminated soil falls onto the receiving plate 13, the receiving plate 13 resets and stops moving, and the feeding operation of the feeding roller 15 stops to avoid waste of remediation agent.

[0047] refer to Figure 1 and 4 As shown, the mixing cylinder 27 is inclined. In this embodiment, rotating rings 40 are installed on both sides of the mixing cylinder 27. The stirring comb 28 is connected to the rotating rings 40. A driven gear 41 is installed on the outer side of the rotating ring 40. A mixing motor 42 is installed on one side of the driven gear 41. A driving gear 43 is installed on the output shaft of the mixing motor 42. The driving gear 43 meshes with the driven gear 41. As the mixing motor 42 works, it drives the rotating ring 40 to rotate, thereby driving the stirring comb 28 to rotate. An inclined plate 37 is installed at the feed inlet of the mixing cylinder 27 to receive the material conveyed by the second conveyor belt 5. A third conveyor belt 38 is installed at the discharge outlet of the mixing cylinder 27 to convey the mixed material.

[0048] refer to Figure 5-6 As shown, a slide rail 30 is installed inside the mixing cylinder 27 along its axial direction. A slider 31 is installed on the receiving comb 29 at a position corresponding to the slide rail 30, and the slider 31 is slidably mounted on the slide rail 30. The first linkage includes a protrusion 32 located at one end of the slide rail 30, and a linkage gear 33 is connected to the center of the protrusion 32. Several return springs 34 are installed between the other end of the slide rail 30 and the receiving comb 29. As the linkage gear 33 rotates, it drives the protrusion 32 to rotate and move closer to the receiving comb 29. The receiving comb 29 is pushed to move along the slide rail 30 to compress the return spring 34, or move away from the receiving comb 29. Under the action of the return spring 34, the receiving comb 29 is driven to return to its original position. Each stirring comb 28 has an arc-shaped rack 35 installed on one side of its rotation direction. As the stirring comb 28 rotates, the arc-shaped rack 35 meshes with the linkage gear 33 and drives the linkage gear 33 to rotate. Elastic strips 36 are installed at both ends of the receiving comb 29 to block the gaps generated when the receiving comb 29 slides.

[0049] During mixing, as the material enters the mixing cylinder 27 along the inclined plate 37, the mixing motor 42 is started, driving the stirring comb 28 to rotate and stir the material inside the mixing cylinder 27. When a stirring comb 28 rotates towards the receiving comb 29, the arc-shaped rack 35 on one side first meshes with the linkage gear 33, driving the linkage gear 33 to rotate, controlling the convex block 32 to rotate, contacting the receiving comb 29, and pushing the receiving comb 29 to move along the slide rail 30 under the action of the slider 31, compressing the return spring 34. At this time, the receiving comb 29 deviates from the corresponding stirring comb 28, allowing the stirring comb 28 to pass smoothly through the receiving comb. The comb teeth 29 perform shearing and crushing work on this route. As the stirring comb teeth 28 continue to rotate, the next stirring comb tooth 28 moves toward the receiving comb tooth 29. The arc-shaped rack 35 corresponding to the stirring comb tooth 28 meshes with the linkage gear 33 and drives the linkage gear 33 to rotate, controlling the convex block 32 to rotate and separate from the receiving comb tooth 29. Under the action of the return spring 34, the receiving comb tooth 29 is pushed to return to its original position. At this time, the receiving comb tooth 29 is offset from the corresponding stirring comb tooth 28, so that the stirring comb tooth 28 can pass smoothly through the receiving comb tooth 29 and perform shearing and crushing work on this route, realizing multi-route shearing and crushing and improving the crushing and mixing effect.

[0050] A construction method for an in-situ crushing and mixing device for contaminated soil includes the following steps:

[0051] S1. Set the crushing box 1 at the contaminated soil collection point, and the collected contaminated soil enters the feed hopper 6;

[0052] S2. Start the crusher and drum screener to crush and screen the contaminated soil. The discharged contaminated soil is conveyed to the remediation box 2 by the first conveyor belt 4.

[0053] S3. Start the drive mechanism to control the vibrating plate 11 to vibrate, disperse the contaminated soil and guide it to the second conveyor belt 5. At the same time, start the material feeding mechanism to control the remediation agent in the remediation agent storage box 12 to be sprinkled onto the dispersed contaminated soil and conveyed to the mixing box 3 with the second conveyor belt 5.

[0054] S4. When the mixing drum 27 is working, the stirring comb 28 is controlled to rotate to stir and mix the material in the mixing drum 27. At the same time, the stirring comb 28 and the receiving comb 29 work to perform secondary crushing of the material. The mixed and crushed material slides out from the discharge port of the mixing drum 27, and the material is sampled at the discharge port of the mixing drum 27. Among them, the unqualified material is transported to the first conveyor belt 4.

[0055] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A contaminated soil in-situ crushing and mixing device, characterized in that: It includes a crushing box, a repair box, and a mixing box, as well as a first conveyor belt connecting the crushing box and the repair box and a second conveyor belt connecting the repair box and the mixing box; The crushing box includes a feed hopper, a crusher connected to the discharge port of the feed hopper, and a drum screen connected to the discharge port of the crusher. One end of the first conveyor belt is located below the drum screen. The repair box includes a vibrating plate and a repair agent storage box. A drive mechanism is installed on the vibrating plate to control the vibrating plate to generate vibration. The vibrating plate is located between the other end of the first conveyor belt and one end of the second conveyor belt. The contaminated soil is transported from the first conveyor belt to the vibrating plate and then falls onto the second conveyor belt after being shaken apart by the vibrating plate. The remediation agent storage tank is located above the second conveyor belt. A material feeding mechanism is installed at the outlet of the remediation agent storage tank to control the remediation agent in the storage tank to fall onto the second conveyor belt. The mixing chamber includes a mixing cylinder, the inlet of which is connected to the other end of the second conveyor belt to receive the material conveyed by the second conveyor belt. The mixing cylinder includes at least two stirring combs and one receiving comb. Each stirring comb moves in a circular motion around the axis of the mixing cylinder, wherein adjacent stirring combs are staggered. The receiving comb is slidably installed along the axis of the mixing cylinder, and a first linkage is installed on the receiving comb. As the stirring combs rotate, the receiving comb is driven to slide through the first linkage, allowing the corresponding stirring comb to pass through the receiving comb. A receiving plate is installed between the vibrating plate and the end of the first conveyor belt to guide the contaminated soil to slide onto the vibrating plate. Several vibration springs are evenly installed at the bottom of the receiving plate. As the contaminated soil falls onto the receiving plate, it causes the receiving plate to compress the vibration springs and move. The material feeding mechanism includes a material feeding roller located at the outlet of the repair agent storage tank. The material feeding roller has at least one material feeding groove. As the material feeding roller rotates, the repair agent is obtained from the repair agent storage tank through the material feeding groove and sprinkled onto the second conveyor belt. The receiving plate is equipped with a second linkage component, which moves with the receiving plate and drives the feeding roller to rotate. The second linkage includes a guide rod arranged along the moving direction of the receiving plate; a movable block sleeved on the guide rod, wherein the movable block is connected to the receiving plate and moves with the receiving plate, thereby driving the movable block to move along the guide rod; a rotating wheel, wherein a connecting rod is eccentrically arranged on one side of the rotating wheel, wherein the two ends of the connecting rod are respectively hinged to the rotating wheel and the movable block, and moves with the movable block, thereby driving the rotating wheel to rotate; and a first rotating shaft coaxial with the rotating wheel, wherein a first pulley is mounted on the first rotating shaft; A second rotating shaft is coaxially mounted on the feeding roller, and a second pulley is mounted on the second rotating shaft. A linkage belt is sleeved between the first pulley and the second pulley. A slide rail is installed inside the mixing cylinder along its axial direction, and a slider is installed on the receiving comb tooth at a position corresponding to the slide rail. The slider is slidably installed on the slide rail. The first linkage component includes a protrusion located at one end of the slide rail, a linkage gear connected to the center of the protrusion, and a plurality of return springs installed between the other end of the slide rail and the receiving comb teeth. As the linkage gear rotates, the protrusion rotates, moves closer to the receiving comb teeth, and pushes the receiving comb teeth to move along the slide rail to compress the return springs, or move away from the receiving comb teeth. Under the action of the return springs, the receiving comb teeth are reset. Each of the agitator comb teeth has an arc-shaped rack installed on one side of its rotation direction. As the agitator comb teeth rotate, the arc-shaped rack meshes with the linkage gear and drives the linkage gear to rotate.

2. The in-situ crushing and mixing equipment for contaminated soil according to claim 1, characterized in that: The crusher includes a crushing cylinder and a pair of opposing rotating crushing rollers located inside the crushing cylinder. The feed inlet of the crushing cylinder is connected to the discharge outlet of the feed hopper. The drum screener includes a screening drum and a first drive motor. The feed inlet of the screening drum is connected to the discharge outlet of the crushing cylinder. The first drive motor controls the screening drum to rotate. The screened contaminated soil passes through the screening drum and falls onto the first conveyor belt.

3. The in-situ crushing and mixing equipment for contaminated soil according to claim 2, characterized in that: The other end of the first conveyor belt, the vibrating plate, and one end of the second conveyor belt are distributed from top to bottom. The driving mechanism includes a second drive motor, which controls the vibrating plate to generate vibration.

4. The in-situ crushing and mixing equipment for contaminated soil according to claim 3, characterized in that: A guide plate is provided between the receiving plate and the vibrating plate, and the two ends of the guide plate are respectively hinged to the receiving plate and the vibrating plate.

5. The in-situ crushing and mixing equipment for contaminated soil according to claim 4, characterized in that: Both ends of the receiving comb teeth are equipped with elastic strips to cover the gaps generated when the receiving comb teeth slide.

6. The in-situ crushing and mixing equipment for contaminated soil according to claim 5, characterized in that: The mixing cylinder is inclined, and an inclined plate is installed at the inlet of the mixing cylinder to receive the material conveyed by the second conveyor belt. A third conveyor belt is installed at the outlet of the mixing cylinder to convey the mixed material.

7. A construction method for an in-situ ex-situ crushing and mixing device for contaminated soil according to claim 6, characterized in that, Includes the following steps: S1. Set the crushing box at the contaminated soil collection point, and the collected contaminated soil enters the feed hopper; S2. Start the crusher and drum screener to crush and screen the contaminated soil. The discharged contaminated soil is conveyed to the remediation box by the first conveyor belt. S3. Start the drive mechanism to control the vibrating plate to vibrate, disperse the contaminated soil, and guide it to the second conveyor belt. At the same time, start the material feeding mechanism to control the remediation agent in the remediation agent storage tank to be sprayed onto the dispersed contaminated soil and conveyed to the mixing tank by the second conveyor belt. S4. The mixing drum operates by controlling the rotation of the stirring comb to stir and mix the materials inside the mixing drum. At the same time, the stirring comb and the receiving comb act to perform secondary crushing of the materials. The mixed and crushed materials slide out from the discharge port of the mixing drum, and samples are taken from the discharge port of the mixing drum. Among them, unqualified materials are transported to the first conveyor belt.

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