Heavy metal contaminated soil treatment device

Abstract

The invention relates to the technical field of soil treatment, and provides a heavy metal contaminated soil treatment device which comprises a mounting plate, a treatment barrel is fixedly welded to the top end face of the mounting plate, a fixing frame is fixedly welded to the top end face of the treatment barrel, and a soil sampling backfilling assembly is mounted in the treatment barrel. A multifunctional processing assembly is installed in the processing cylinder, the soil taking and backfilling assembly comprises a servo motor and a conveying cylinder, a first smashing blade and a drilling cylinder are welded and fixed to the conveying cylinder, a cutting blade is welded and fixed to the bottom end face of the drilling cylinder, and the multifunctional processing assembly comprises a rotating frame and a first connecting pipe; a first through hole is formed in the first connecting pipe, and a second connecting pipe is fixedly connected to the first connecting pipe. By means of the technical scheme, the problems that in the prior art, a heavy metal contaminated soil treatment device cannot conduct deep treatment on soil in a contaminated area, and chemicals cannot be evenly mixed with the soil are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of soil treatment, and specifically, to a device for treating heavy metal contaminated soil. Background Art

[0002] In recent years, with the accelerated advancement of industrialization and urbanization, heavy metal pollution has become a major threat to the global soil environment. Heavy metal pollutants such as lead, cadmium, mercury, and chromium continuously invade the soil system through industrial wastewater discharge, solid waste accumulation, and abuse of pesticides and fertilizers. The accumulation of these heavy metals in the soil not only destroys the soil structure and fertility but also poses a threat to human health through the food chain. Therefore, it is necessary to use treatment devices to repair heavy metal contaminated soil.

[0003] However, there are some problems in the actual use of existing heavy metal contaminated soil treatment devices. For example, a traction type rapid treatment device for heavy metal contaminated soil with the publication number CN108126979A extracts treatment agents and sprays them on the soil using a leaching tray to achieve rapid treatment of heavy metal contaminated soil. However, the agents can only be sprayed on the soil surface and cannot deeply treat the soil in the polluted area. Moreover, after the agents are sprayed on the soil surface, they cannot be evenly mixed with the soil. Therefore, the treatment and repair effect on heavy metal contaminated soil is poor. In addition, the method of repairing heavy metal pollution by spraying agents is prone to the problem that the agents remain in the soil and heavy metals cannot be discharged, resulting in heavy metals remaining in the soil and polluting groundwater. Therefore, it is necessary to provide a heavy metal contaminated soil treatment device to meet the needs of users. Summary of the Invention

[0004] The present invention provides a device for treating heavy metal contaminated soil, which solves the problems in the related art that the heavy metal contaminated soil treatment device cannot deeply treat the soil in the polluted area, cannot evenly mix the agents with the soil, and is prone to the problem that the agents remain in the soil and heavy metals cannot be discharged, resulting in heavy metals remaining in the soil.

[0005] The technical solution of the present invention is as follows:

[0006] A heavy metal contaminated soil treatment device, including a mounting plate, on the top surface of the mounting plate is welded and fixed a treatment cylinder, on the top surface of the treatment cylinder is welded and fixed a fixing frame, a soil extraction and backfilling component is installed inside the treatment cylinder, a multi-functional treatment component is installed inside the treatment cylinder, the soil extraction and backfilling component includes a servo motor and a conveying cylinder, on the conveying cylinder is welded and fixed a first crushing blade and a drilling cylinder, on the bottom surface of the drilling cylinder is welded and fixed a cutting blade, the multi-functional treatment component includes a rotating frame and a first connecting pipe, on the first connecting pipe is opened a first through hole, fixedly connected to the first connecting pipe is a second connecting pipe, on the second connecting pipe is opened a second through hole, rotatably connected to the first connecting pipe is a turntable, inside the treatment cylinder is welded and fixed a first material guiding plate and a second material guiding plate.

[0007] As a preferred solution of the present invention, wherein: fixedly welded on the inner bottom surface of the treatment cylinder is a second filter plate, the bottom surface of the treatment cylinder is inclined, the second filter plate is integrally circular, the cross-section of the second filter plate is an isosceles triangle, the treatment cylinder is integrally cylindrical, fixedly connected to the inner wall of the overall cylindrical shape of the treatment cylinder is a sealing cylinder, fixedly connected inside the treatment cylinder are a third material pipe and a fourth material pipe, the third material pipe and the fourth material pipe are evenly angularly distributed inside the treatment cylinder, fixedly welded on the top surface of the fixing frame are a storage box and a heat insulation box, fixedly connected to the bottom side end of the storage box is a liquid guiding pipe, and connected to the bottom side end of the heat insulation box is a gas guiding pipe.

[0008] As a preferred solution of the present invention, wherein: the servo motor is welded and fixed at the center of the top of the fixing frame, the output end of the servo motor is connected to a driving shaft, welded and fixed at the bottom end of the driving shaft is a spiral rod, on the spiral rod is opened a clamping groove, the top of the spiral rod is rotatably connected through a sealing bearing to a sleeve, welded and fixed inside the sleeve is a connecting spring, welded and fixed to the connecting spring is a clamping block, and the end of the clamping block is clamped and connected in the clamping groove.

[0009] As a preferred solution of the present invention, wherein: the clamping grooves are evenly angularly distributed on the spiral rod, the clamping grooves and the connecting spring are in one-to-one correspondence through the clamping blocks, the cross-section of the clamping groove and the cross-section of the end of the clamping block are both right trapezoids, the bottom of the sleeve is welded and fixed at the center of the top of the conveying cylinder, and the outer wall of the conveying cylinder is in fit with the inner wall of the sealing cylinder.

[0010] As a preferred embodiment of the present invention, the following is provided: The conveying cylinder is rotatably connected to the mounting plate through bearings. A first material pipe and a second material pipe are fixedly connected to the conveying cylinder. The first material pipe and the second material pipe are evenly angularly distributed on the conveying cylinder. The first material pipe corresponds to the third material pipe one by one, and the second material pipe corresponds to the fourth material pipe one by one. The first material pipe, the second material pipe, the third material pipe, and the fourth material pipe have the same diameter. The cutting blades are evenly angularly distributed on the bottom end face of the drilling cylinder. There are six groups of first crushing blades, and the six groups of first crushing blades are evenly angularly distributed on the conveying cylinder. Each group of first crushing blades is evenly spaced on the conveying cylinder.

[0011] As a preferred embodiment of the present invention, the following is provided: The rotating frame is welded and fixed to the drive shaft. The rotating frame is rotatably connected to a first sealing plate through a sealing bearing. The end of the liquid guide pipe and the end of the air guide pipe are both fixedly connected to the first sealing plate. The rotating frame is rotatably connected to a first connecting pipe through a sealing bearing. The top end of the first connecting pipe is welded and fixed with a circular gear. An internal gear is meshed with the circular gear. The internal gear is welded and fixed to the inner top end face of the fixed frame. The first connecting pipes are evenly angularly distributed on the rotating frame. The first connecting pipe corresponds to the circular gear one by one. The second connecting pipes are evenly angularly distributed on the first connecting pipe. The second through holes are evenly spaced on the second connecting pipe.

[0012] As a preferred embodiment of the present invention, the following is provided: Second crushing blades are welded and fixed to the turntable. Third crushing blades are welded and fixed to the first material guiding plate. Fourth crushing blades are welded and fixed to the second material guiding plate. Fixed rods are welded and fixed to the bottom end face of the turntable. Push rods are welded and fixed to the bottom ends of the fixed rods. The fixed rods are evenly angularly distributed on the bottom end face of the turntable. The fixed rod corresponds to the push rod one by one. The push rod is in contact with the top end face of the second filter plate.

[0013] As a preferred embodiment of the present invention, the following is provided: The turntable, the first material guiding plate, and the second material guiding plate are all in an annular shape. The cross-section of the turntable, the cross-section of the first material guiding plate, and the cross-section of the second material guiding plate are in an isosceles trapezoid shape. The second crushing blades are evenly angularly distributed on the two inclined surfaces of the turntable. The third crushing blades are evenly angularly distributed on the bottom inclined surface of the first material guiding plate. The fourth crushing blades are evenly angularly distributed on the bottom inclined surface of the second material guiding plate. The second crushing blades are staggered with the third crushing blades and the fourth crushing blades respectively.

[0014] As a preferred embodiment of the present invention, wherein: a liquid inlet pipe is fixedly connected to the top of the storage box, an air inlet pipe is fixedly connected to the top of the heat insulation box, a water pump is flange-connected to the liquid guide pipe, an air pump is flange-connected to the air guide pipe, an electric heating plate is fixedly installed in the heat insulation box, drain pipes are fixedly connected to both sides of the bottom of the treatment cylinder, positioning grooves are formed through the front and rear sides of the mounting plate, and hand-holding grooves are formed through the left and right sides of the mounting plate.

[0015] As a preferred embodiment of the present invention, wherein: a magnetic frame is fixedly connected in the positioning groove, a collection box is magnetically adsorbed and connected in the magnetic frame, a slot is formed through the top side end of the collection box, the drain pipe is slidably connected through the slot, hydraulic rods are fixedly installed on the left and right sides of the mounting plate, a support frame is fixedly connected to the bottom end of the hydraulic rod, and a pressing wheel is rotatably connected in the support frame.

[0016] The working principle and beneficial effects of the present invention are as follows:

[0017] 1. In the present invention, a soil extraction and backfilling assembly is provided. The clamping block and the clamping groove in the sleeve form a ratchet mechanism. Under the counterclockwise driving action of the servo motor, the screw rod, the conveying cylinder and the drilling cylinder can be driven to rotate simultaneously through the sleeve. Combining each first crushing blade and each cutting blade, the soil in the heavy metal contaminated area can be efficiently drilled, and at the same time, the soil inside the drilling cylinder can be comprehensively and evenly crushed; and through the clockwise driving of the servo motor, the screw rod can be used to rotate alone to automatically convey the crushed soil into the device for subsequent repair treatment work; after the soil is repaired, it can be backfilled again through the screw rod and the conveying cylinder, combining the high repair effect of ex-situ repair and the high repair efficiency of in-situ repair, avoiding the problem of uneven distribution of agents caused by manual tillage in traditional in-situ repair, and at the same time avoiding the problems of high transportation cost and long transportation cycle in traditional ex-situ repair.

[0018] 2. The present invention is provided with a multi-functional processing component. During the operation of the servo motor, the soil in the processing cylinder can be continuously and stably circulated and transported through the screw rod. At the same time, in combination with the circular gear and the internal gear, each first connecting pipe can be driven to automatically rotate during the revolution process. In combination with the second crushing blades on the turntable, the third crushing blades on the first feeding plate, and the fourth crushing blades on the second feeding plate, the circulated and transported soil can be comprehensively and evenly crushed, avoiding problems such as a large amount of soil caking, resulting in uneven contact between the soil and the repair agent, poor repair effect, and low repair efficiency. And by using the second through holes on the second connecting pipe, the leaching agent can be evenly sprayed on the circulated and crushed soil, and then the heavy metal contaminated soil can be efficiently and evenly repaired. Moreover, by using the air pump on the air guide pipe and the electric heating plate in the heat insulation box, high-temperature air can also be transported through the second through holes on the second connecting pipe, and then the repaired soil can be efficiently and evenly dried, realizing deep treatment of heavy metal soil, improving the repair effect and reducing environmental risks.

[0019] 3. The present invention is provided with a second filter plate and a collection box. During the soil repair process, the used leaching solution can be automatically collected in the collection box through the second filter plate and the drain pipe, avoiding the problem that the used leaching solution remains in the soil and the heavy metals in the leaching solution re-pollute the soil. And by using the magnetic frame in the positioning groove, the collection box can be conveniently disassembled and assembled, and then the used leaching solution can be conveniently and stably transported, increasing the convenience of use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0021] Figure 1 is the overall structural schematic diagram of the present invention;

[0022] Figure 2 is the connection structure schematic diagram of the support frame and the pressure wheel of the present invention;

[0023] Figure 3 is the main sectional structural schematic diagram of the processing cylinder of the present invention;

[0024] Figure 4 is the present invention Figure 3 the enlarged structural schematic diagram at position A in;

[0025] Figure 5 is the present invention Figure 3 the enlarged structural schematic diagram at position B in;

[0026] Figure 6 is the present invention Figure 3 the enlarged structural schematic diagram at position C in;

[0027] Figure 7 is the schematic diagram of the main sectional structure of the drill pipe of the present invention;

[0028] Figure 8 is the present invention Figure 7 the enlarged structure schematic diagram at position D in;

[0029] Figure 9 is the schematic diagram of the connection structure between the drill pipe and the cutting blade of the present invention;

[0030] Figure 10 is the schematic diagram of the connection structure between the conveying cylinder and the first crushing blade of the present invention;

[0031] Figure 11 is the schematic diagram of the connection structure between the treatment cylinder and the sealing cylinder of the present invention;

[0032] Figure 12 is the schematic diagram of the connection structure between the circular gear and the internal gear of the present invention;

[0033] Figure 13 is the schematic diagram of the connection structure between the first material guiding plate and the third crushing blade of the present invention;

[0034] Figure 14 is the schematic diagram of the connection structure between the second material guiding plate and the fourth crushing blade of the present invention;

[0035] Figure 15 is the schematic diagram of the connection structure between the turntable and the second crushing blade of the present invention;

[0036] Figure 16 is the schematic diagram of the side sectional structure of the collection box of the present invention;

[0037] Figure 17 is the schematic diagram of the connection structure between the screw rod and the conveying cylinder of the present invention;

[0038] Figure 18 is the schematic diagram of the top sectional structure of the sleeve of the present invention.

[0039] In the figure: 1, mounting plate; 2, processing cylinder; 3, fixed frame; 4, soil-taking and backfilling component; 401, servo motor; 402, drive shaft; 403, screw rod; 404, card slot; 405, sleeve; 406, connecting spring; 407, clamping block; 408, conveying cylinder; 409, first material pipe; 410, second material pipe; 411, first crushing blade; 412, drilling cylinder; 413, cutting blade; 414, threaded hole; 415, fixing plate; 416, threaded rod; 5, multi-functional processing component; 501, rotating frame; 502, first sealing plate; 503, first connecting pipe; 504, circular gear; 505, internal gear; 506, second sealing plate; 507, first through hole; 508, second connecting pipe; 509, second through hole; 510, first filter screen plate; 511, turntable; 512, second crushing blade; 513, first material guiding plate; 514, third crushing blade; 515, second material guiding plate; 516, fourth crushing blade; 517, fixing rod; 518, push rod; 6, second filter screen plate; 7, sealing cylinder; 8, third material pipe; 9, fourth material pipe; 10, storage box; 11, liquid inlet pipe; 12, liquid guiding pipe; 13, water pump; 14, heat insulation box; 15, air inlet pipe; 16, air guiding pipe; 17, air pump; 18, electric heating plate; 19, liquid discharge pipe; 20, positioning groove; 21, magnetic frame; 22, collection box; 23, slot; 24, sealing ring; 25, hand-holding groove; 26, hydraulic rod; 27, support frame; 28, pressing wheel; 29, ventilation cylinder; 30, third filter screen plate; 31, activated carbon mesh plate. Specific implementation manner

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the scope of protection of the present invention.

[0041] Embodiment 1

[0042] As Figures 1 to 18As shown in the figure, this embodiment proposes a device for treating heavy metal contaminated soil, which includes a mounting plate 1. A treatment cylinder 2 is welded and fixed on the top surface of the mounting plate 1. A fixing frame 3 is welded and fixed on the top surface of the treatment cylinder 2. A soil extraction and backfilling component 4 is installed in the treatment cylinder 2. A multi-functional treatment component 5 is installed in the treatment cylinder 2. The soil extraction and backfilling component 4 includes a servo motor 401 and a conveying cylinder 408. A first crushing blade 411 and a drilling cylinder 412 are welded and fixed on the conveying cylinder 408. The first crushing blade 411 and the drilling cylinder 412 are welded together. A cutting blade 413 is welded and fixed on the bottom surface of the drilling cylinder 412. The multi-functional treatment component 5 includes a rotating frame 501 and a first connecting pipe 503. A first through hole 507 is opened on the first connecting pipe 503. A second connecting pipe 508 is fixedly connected to the first connecting pipe 503. A second through hole 509 is opened on the second connecting pipe 508. A turntable 511 is rotatably connected to the first connecting pipe 503. A first material guiding plate 513 and a second material guiding plate 515 are welded and fixed in the treatment cylinder 2. The soil extraction and backfilling component 4 can efficiently drill and crush the soil in the heavy metal contaminated area, and at the same time can automatically transport the crushed soil into the device. Combined with the multi-functional treatment component 5, it can perform integrated treatment such as cyclic crushing, leaching and drying of the soil, and complete the efficient soil repair work. After the soil is repaired, it can be backfilled through the soil extraction and backfilling component 4 again. It combines the high repair effect of ex-situ repair and the high repair efficiency of in-situ repair, avoids the problem of uneven distribution of agents caused by manual tillage in traditional in-situ repair, and at the same time avoids the problems of high transportation cost and long transportation cycle in traditional ex-situ repair.

[0043] Embodiment 2

[0044] As Figures 1 to 18 shown, based on the same concept as the above Embodiment 1, this embodiment also proposes a device for treating heavy metal contaminated soil.

[0045] In this embodiment, a second filter plate 6 is welded and fixed to the inner bottom end surface of the treatment cylinder 2. The bottom end surface of the treatment cylinder 2 is inclined. The second filter plate 6 is integrally annular, and the cross-section of the second filter plate 6 is an isosceles triangle. The treatment cylinder 2 is integrally cylindrical. A sealing cylinder 7 is fixedly connected to the inner wall of the overall cylindrical shape of the treatment cylinder 2. A third material pipe 8 and a fourth material pipe 9 are fixedly connected in the treatment cylinder 2. The third material pipe 8 and the fourth material pipe 9 are evenly distributed at equal angles in the treatment cylinder 2. A storage box 10 and a heat insulation box 14 are welded and fixed to the top end surface of the fixed frame 3. A liquid guide pipe 12 is fixedly connected to the bottom side end of the storage box 10. A gas guide pipe 16 is connected to the bottom side end of the heat insulation box 14. A liquid inlet pipe 11 is fixedly connected to the top of the storage box 10. An air inlet pipe 15 is fixedly connected to the top of the heat insulation box 14. A water pump 13 is flange-connected to the liquid guide pipe 12. An air pump 17 is flange-connected to the gas guide pipe 16. Solenoid valves are installed on the liquid inlet pipe 11, the air inlet pipe 15, the liquid guide pipe 12 and the gas guide pipe 16. An electric heating plate 18 is fixedly installed in the heat insulation box 14. After all the soil in the soil drilling area is transported into the treatment cylinder 2, under the guiding action of the inclined surface at the top of the second filter plate 6, the stable subsequent cyclic transportation of the soil can be ensured.

[0046] In this embodiment, the servo motor 401 is welded and fixed to the central part of the top end of the fixed frame 3. The output end of the servo motor 401 is connected to a driving shaft 402. A spiral rod 403 is welded and fixed to the bottom end of the driving shaft 402. A clamping groove 404 is formed on the spiral rod 403. The top of the spiral rod 403 is rotationally connected to a sleeve 405 through a sealing bearing. A connecting spring 406 is welded and fixed inside the sleeve 405. A clamping block 407 is welded and fixed to the connecting spring 406. The clamping block 407 is slidably connected in the sleeve 405 in a limited manner. The end of the clamping block 407 is clamped and connected in the clamping groove 404. The clamping grooves 404 are evenly distributed at equal angles on the spiral rod 403. The clamping grooves 404 correspond to the connecting spring 406 through the clamping block 407 one by one. The cross-section of the clamping groove 404 and the cross-section of the end of the clamping block 407 are both right-angled trapezoids. The bottom of the sleeve 405 is welded and fixed to the central part of the top of the conveying cylinder 408. The spiral rod 403 is rotationally connected inside the conveying cylinder 408. The outer wall of the conveying cylinder 408 is in contact with the inner wall of the sealing cylinder 7. The clamping block 407 and the clamping groove 404 inside the sleeve 405 form a ratchet mechanism. Under the counterclockwise driving action of the servo motor 401, the spiral rod 403, the conveying cylinder 408 and the drilling cylinder 412 can be driven to rotate simultaneously through the sleeve 405, and thus the stability and convenience of the subsequent soil drilling and soil crushing operations can be ensured.

[0047] In this embodiment, the conveying cylinder 408 is rotatably connected to the mounting plate 1 through a bearing. A first material pipe 409 and a second material pipe 410 are fixedly connected to the conveying cylinder 408. The first material pipe 409 and the second material pipe 410 are evenly angularly distributed on the conveying cylinder 408. The first material pipe 409 corresponds to the third material pipe 8 one by one, and the second material pipe 410 corresponds to the fourth material pipe 9 one by one. The first material pipe 409, the second material pipe 410, the third material pipe 8, and the fourth material pipe 9 have the same diameter. Threaded holes 414 are formed on both sides of the top of the drill cylinder 412. A fixing plate 415 is welded and fixed to the bottom end surface of the mounting plate 1. A threaded rod 416 is threadedly connected to the fixing plate 415. The end of the threaded rod 416 is threadedly connected to the threaded hole 414. The threaded holes 414 correspond to the fixing plate 415 one by one through the threaded rods 416. The cutting blades 413 are evenly angularly distributed on the bottom end surface of the drill cylinder 412. There are six groups of first crushing blades 411. The six groups of first crushing blades 411 are evenly angularly distributed on the conveying cylinder 408. Each group of first crushing blades 411 is evenly spaced on the conveying cylinder 408. Under the combined action of each first crushing blade 411 and each cutting blade 413, the soil in the heavy metal contaminated area can be efficiently drilled, and at the same time, the soil inside the drill cylinder 412 can be comprehensively and evenly crushed; and through the clockwise drive of the servo motor 401, the crushed soil can be automatically conveyed into the device for subsequent repair treatment work by the single rotation of the screw rod 403.

[0048] In this embodiment, the rotating frame 501 is welded and fixed on the driving shaft 402. The rotating frame 501 is rotatably connected with a first sealing plate 502 through a sealing bearing. The ends of the liquid guide pipe 12 and the air guide pipe 16 are both fixedly connected to the first sealing plate 502. The rotating frame 501 is rotatably connected with a first connecting pipe 503 through a sealing bearing. The top end of the first connecting pipe 503 is welded and fixed with a circular gear 504. The circular gear 504 is meshed and connected with an internal gear 505. The internal gear 505 is welded and fixed on the inner top surface of the fixed frame 3. A second sealing plate 506 is rotatably connected to the first connecting pipe 503. The second sealing plate 506 is rotatably connected to the bottom of the fixed frame 3 through a bearing. Both the first sealing plate 502 and the second sealing plate 506 are annular. The first connecting pipes 503 are equiangularly distributed on the rotating frame 501. The first connecting pipes 503 correspond to the circular gears 504 one by one. The second connecting pipes 508 are equiangularly distributed on the first connecting pipes 503. The second through holes 509 are equidistantly distributed on the second connecting pipes 508. Under the meshing action of the circular gear 504 and the internal gear 505, each first connecting pipe 503 can be driven to automatically rotate during the revolution process, and by using each second through hole 509 on the second connecting pipe 508, the soil for cyclic transportation and pulverization can be evenly sprayed with the eluent, so that the heavy metal contaminated soil can be efficiently and evenly repaired; moreover, by using the air pump 17 on the air guide pipe 16 and the electric heating plate 18 in the heat insulation box 14, high-temperature air can also be transported through each second through hole 509 on the second connecting pipe 508, so that the repaired soil can be efficiently and evenly dried.

[0049] In this embodiment, a first filter plate 510 is welded and fixed inside the second through hole 509, a second crushing blade 512 is welded and fixed on the turntable 511, a third crushing blade 514 is welded and fixed on the first material guiding plate 513, a fourth crushing blade 516 is welded and fixed on the second material guiding plate 515, a fixing rod 517 is welded and fixed on the bottom end surface of the turntable 511, a push rod 518 is welded and fixed at the bottom end of the fixing rod 517. The fixing rods 517 are distributed at equal angles on the bottom end surface of the turntable 511, and the fixing rods 517 correspond to the push rods 518 one by one. The push rod 518 is inclined and is in contact with the top end surface of the second filter plate 6. The turntable 511, the first material guiding plate 513, and the second material guiding plate 515 are all annular. The cross-sections of the turntable 511, the first material guiding plate 513, and the second material guiding plate 515 are isosceles trapezoids. The second crushing blades 512 are distributed at equal angles on the two inclined surfaces of the turntable 511, the third crushing blades 514 are distributed at equal angles on the bottom inclined surface of the first material guiding plate 513, and the fourth crushing blades 516 are distributed at equal angles on the bottom inclined surface of the second material guiding plate 515. The second crushing blades 512 are staggered with the third crushing blades 514 and the fourth crushing blades 516 respectively. During the operation of the servo motor 401, the soil in the treatment cylinder 2 can be continuously and stably circulated and conveyed through the screw rod 403. Combining the second crushing blades 512 on the turntable 511, the third crushing blades 514 on the first material guiding plate 513, and the fourth crushing blades 516 on the second material guiding plate 515, the circulated and conveyed soil can be comprehensively and evenly crushed to avoid problems such as a large amount of soil caking, resulting in uneven contact between the soil and the repair agent, poor repair effect, and low repair efficiency.

[0050] In this embodiment, a drain pipe 19 is fixedly connected to the bottom side end of the treatment cylinder 2. Positioning grooves 20 are formed through the front and rear sides of the mounting plate 1, and hand-holding grooves 25 are formed through the left and right sides of the mounting plate 1. Ventilation cylinders 29 are bolted to the two sides of the top of the treatment cylinder 2. A third filter plate 30 and an activated carbon mesh plate 31 are bolted inside the ventilation cylinders 29. A magnetic frame 21 is fixedly connected inside the positioning grooves 20. A collection box 22 is magnetically adsorbed and connected inside the magnetic frame 21. A slot 23 is formed through the top side end of the collection box 22. A sealing ring 24 is fixedly connected inside the slot 23. The drain pipe 19 is slidably connected through the slot 23 and is in contact with the inner wall of the sealing ring 24. Hydraulic rods 26 are installed and fixed on the left and right sides of the mounting plate 1. The bottom ends of the hydraulic rods 26 are fixedly connected to a support frame 27. A pressing wheel 28 is rotatably connected inside the support frame 27. During the soil repair process, the used leaching solution can be automatically collected in the collection box 22 through the second filter plate 6 and the drain pipe 19, avoiding the problem that the used leaching solution remains in the soil and the heavy metals in the leaching solution pollute the soil again.

[0051] It should be noted that the present invention is a device for treating heavy metal contaminated soil. First, the staff can hold the hand on the hand-held groove 25 of the mounting plate 1, and use the pressing wheel 28 to push the whole device to move. After the whole device is moved to the heavy metal contaminated soil area, the servo motor 401 can be driven. Under the driving action of the servo motor 401, the driving shaft 402 is driven to rotate counterclockwise. The driving shaft 402 can drive the screw rod 403 to rotate synchronously. At this time, the screw conveying direction of the screw rod 403 is downward; at the same time, the sleeve 405 on the clamping block 407 can be driven to rotate synchronously through the clamping groove 404 on the screw rod 403, and then the conveying cylinder 408 and the drilling cylinder 412 can be driven to rotate synchronously through the sleeve 405.

[0052] During the rotation of the drilling cylinder 412 and the conveying cylinder 408, by driving the hydraulic rod 26, the mounting plate 1 can be used to drive the drilling cylinder 412 and the conveying cylinder 408 to move downward at a constant speed. At this time, the cutting blades 413 at the bottom of the drilling cylinder 412 can contact the soil and perform cutting and drilling work. At the same time, under the combined action of the constant downward movement and rotation of the drilling cylinder 412 and the conveying cylinder 408, and the first crushing blades 411, the soil in the drilling area can be comprehensively and efficiently crushed; after the soil in the drilling cylinder 412 is crushed, the staff can rotate the threaded rod 416 on the fixing plate 415 to make its thread rotate into the threaded hole 414 on the drilling cylinder 412 to complete the positioning and fixing of the drilling cylinder 412. After the drilling cylinder 412 is positioned and fixed, the first material pipe 409 on the conveying cylinder 408 can be driven to align with the third material pipe 8 on the treatment cylinder 2, and the second material pipe 410 on the conveying cylinder 408 can be aligned with the fourth material pipe 9 on the treatment cylinder 2.

[0053] Subsequently, the servo motor 401 can be driven to drive the driving shaft 402 to rotate clockwise. During the clockwise rotation of the driving shaft 402, under the guiding action of the inclined surface of the clamping groove 404 and the inclined surface of the clamping block 407, the driving shaft 402 can push the clamping block 407 on the connecting spring 406 to automatically move out of the clamping groove 404. At this time, the driving shaft 402 will not drive the sleeve 405 to rotate synchronously. Therefore, under the fixing action of the threaded rod 416, the stable fixing state of the conveying cylinder 408 and the drilling cylinder 412 can be ensured. Under the clockwise rotation action of the driving shaft 402, the screw rod 403 can be driven to rotate synchronously. At this time, the screw conveying direction of the screw rod 403 is upward, and then the crushed soil can be conveyed upward through the conveying cylinder 408. Since the end face of the second filter plate 6 is inclined, during the upward conveying process of the soil, first, a small amount of soil will be conveyed to the bottom end inside the treatment cylinder 2 through the second material pipe 410 and the fourth material pipe 9. When the soil accumulates at the fourth material pipe 9 and blocks the fourth material pipe 9, the soil in the conveying cylinder 408 can continue to be conveyed upward and be conveyed into the treatment cylinder 2 through the first material pipe 409 and the third material pipe 8.

[0054] After the soil is transported into the treatment cylinder 2 through the first material pipe 409 and the third material pipe 8, under the guiding action of the inclined surfaces at the tops of the first guide plate 513 and the second guide plate 515, the soil can be transported downward through the gap between the first guide plate 513 and the second guide plate 515, and is guided and transported through the inclined surface at the top of the turntable 511. At the same time, during the rotation of the drive shaft 402, the rotating frame 501 can drive the first connecting pipes 503 on the second sealing plate 506 to move in a circular motion. At this time, the first connecting pipes 503 can drive the turntable 511 to perform circular motion. During the continuous rotation of the turntable 511, combined with the second crushing blades 512 on the turntable 511, the third crushing blades 514 on the first guide plate 513, and the fourth crushing blades 516 on the second guide plate 515, the soil can be comprehensively and evenly crushed.

[0055] And during the rotation of the turntable 511, it can drive the push rods 518 on the fixed rods 517 to move synchronously. Therefore, after all the soil in the soil drilling area is transported into the treatment cylinder 2, under the guiding of the inclined surface at the top of the second filter plate 6 and the pushing action of the push rods 518, the soil falling on the second filter plate 6 can be transported into the conveying cylinder 408 again through the second material pipe 410 and the fourth material pipe 9. Combined with the continuous rotation of the screw rod 403, the soil can be continuously transported upward, and is transported to the tops of the first guide plate 513 and the second guide plate 515 through the first material pipe 409 and the third material pipe 8. In this way, the soil sampling and cyclic conveying work can be automatically completed, and the continuously conveyed soil can be continuously crushed to avoid problems such as a large amount of soil caking, resulting in uneven contact between the soil and the remediation agent, poor remediation effect, and low remediation efficiency.

[0056] And during the soil circulating and transporting process, driven by the water pump 13, the leaching solution in the storage tank 10 can be sucked through the liquid guide pipe 12 and transported to the rotating frame 501 on the first sealing plate 502. Since the rotating frame 501 is connected to the first sealing plate 502 by bearings, during the rotation of the rotating frame 501, the first sealing plate 502 can remain stationary, which will not affect the connection with the liquid guide pipe 12 and the gas guide pipe 16. Therefore, the leaching solution can be stably transported into the rotating frame 501. At this time, the leaching solution can be transported into the first connecting pipe 503 through the first through hole 507 and sprayed out through the second through holes 509 on each second connecting pipe 508. Under the action of the first filter plate 510, soil can be prevented from entering the second connecting pipe 508. Moreover, during the circular motion of each first connecting pipe 503, the corresponding circular gear 504 can be driven to move synchronously within the internal gear 505. At this time, under the meshing action of the circular gear 504 and the internal gear 505, each first connecting pipe 503 during revolution can be driven to rotate automatically. Combined with the second through holes 509 on each second connecting pipe 508, the leaching agent can be evenly sprayed onto the soil during the circulating transportation and pulverization process. By using the reactions such as dissolution, complexation, and ion exchange between the leaching agent and heavy metals in the soil, the heavy metals can be transferred from the soil to the leaching agent, and thus the heavy metal contaminated soil can be efficiently and evenly repaired.

[0057] The used leaching agent is filtered by the second filter plate 6 and guided by the inclined surface at the bottom of the treatment cylinder 2 to be transported to the drain pipe 19. Subsequently, the leaching agent can be transported to the collection tank 22 through the drain pipe 19 for automatic collection. And by using the positioning and magnetic attraction of the magnetic frame 21 in the positioning groove 20 on the collection tank 22, the collection tank 22 can be conveniently disassembled and assembled, and thus the used leaching solution can be conveniently and stably transported and processed. When installing the collection tank 22, only need to insert the slot 23 on the collection tank 22 onto the drain pipe 19, and combine with the sealing ring 24 to achieve the sealing of the connection. And combined with the positioning and magnetic attraction of the magnetic frame 21, the installation and fixation of the collection tank 22 can be conveniently completed, ensuring the stability of the subsequent working state of the collection tank 22.

[0058] After the soil is leached by the leaching agent, the water pump 13 can be turned off and the air pump 17 can be turned on. At this time, air enters the heat insulation box 14 through the air inlet pipe 15. Under the heating and guiding action of each electric heating plate 18, it can be transported to the rotating frame 501 on the first sealing plate 502 through the air guide pipe 16. Similarly, the high-temperature air can be transported into the first connecting pipe 503 through the first through hole 507 and sprayed out through each second through hole 509 on each second connecting pipe 508. Thus, the soil in the circulating transportation process can be efficiently and evenly dried. Moreover, the excess air is discharged through the ventilation cylinder 29, and under the combined action of the third filter plate 30 and the activated carbon mesh plate 31, the air can be filtered and purified.

[0059] After the soil is crushed, leached and dried, the threaded rod 416 on the fixed plate 415 can be rotated again to move it out of the threaded hole 414 on the drill cylinder 412. And by rotating the drive shaft 402 counterclockwise again, the sleeve 405 is driven to rotate synchronously by the clamping groove 404 and the clamping block 407, and the screw rod 403 and the conveying cylinder 408 are driven to rotate synchronously. At this time, the treated soil can be automatically transported into the conveying cylinder 408 through the intermittently aligned second material pipe 410 and the fourth material pipe 9. And under the guiding and conveying action of the screw rod 403, the backfilling of the soil is completed. Moreover, during the backfilling process, the hydraulic rod 26 can be used to push the mounting plate 1 to move upward and reset evenly until the drill cylinder 412 moves out of the soil. Subsequently, the staff can perform the same operations as above to repair the soil in the next area.

[0060] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for treating heavy metal contaminated soil, characterized in that, It includes an installation plate (1), on the top surface of the installation plate (1), a treatment cylinder (2) is welded and fixed. On the top surface of the treatment cylinder (2), a fixed frame (3) is welded and fixed. Inside the treatment cylinder (2), a soil extraction and backfilling component (4) is installed, and a multi-functional treatment component (5) is installed. The soil extraction and backfilling component (4) includes a servo motor (401) and a conveying cylinder (408). On the conveying cylinder (408), a first crushing blade (411) and a drilling cylinder (412) are welded and fixed. On the bottom surface of the drilling cylinder (412), a cutting blade (413) is welded and fixed. The multi-functional treatment component (5) includes a rotating frame (501) and a first connecting pipe (503). On the first connecting pipe (503), a first through hole (507) is opened. A second connecting pipe (508) is fixedly connected to the first connecting pipe (503). On the second connecting pipe (508), a second through hole (509) is opened. A turntable (511) is rotatably connected to the first connecting pipe (503). Inside the treatment cylinder (2), a first material guiding plate (513) and a second material guiding plate (515) are welded and fixed.

2. The heavy metal contaminated soil treatment device according to claim 1, characterized in that: On the inner bottom surface of the treatment cylinder (2), a second filter plate (6) is welded and fixed. The bottom surface of the treatment cylinder (2) is inclined. The second filter plate (6) is integrally circular ring-shaped. The cross-section of the second filter plate (6) is isosceles triangular. The treatment cylinder (2) is integrally cylindrical. On the overall cylindrical inner wall of the treatment cylinder (2), a sealing cylinder (7) is fixedly connected. Inside the treatment cylinder (2), a third material pipe (8) and a fourth material pipe (9) are fixedly connected. The third material pipe (8) and the fourth material pipe (9) are evenly angularly distributed inside the treatment cylinder (2). On the top surface of the fixed frame (3), a storage box (10) and a heat insulation box (14) are welded and fixed. On the bottom side end of the storage box (10), a liquid guiding pipe (12) is fixedly connected. On the bottom side end of the heat insulation box (14), an air guiding pipe (16) is connected.

3. The heavy metal contaminated soil treatment device according to claim 2, characterized in that: The servo motor (401) is welded and fixed at the center of the top of the fixed frame (3). The output end of the servo motor (401) is connected to a driving shaft (402). At the bottom of the driving shaft (402), a screw rod (403) is welded and fixed. On the screw rod (403), a clamping groove (404) is opened. The top of the screw rod (403) is rotatably connected to a sleeve (405) through a sealing bearing. Inside the sleeve (405), a connecting spring (406) is welded and fixed. On the connecting spring (406), a clamping block (407) is welded and fixed. The end of the clamping block (407) is clamped and connected in the clamping groove (404).

4. A heavy metal contaminated soil treatment device according to claim 3, characterized in that: The card slots (404) are distributed on the spiral rod (403) at equal angles. The card slots (404) correspond to the connecting springs (406) one by one through the clamping blocks (407). The cross-sections of the card slots (404) and the end cross-sections of the clamping blocks (407) are both right trapezoids. The bottom of the sleeve (405) is welded and fixed at the central part of the top of the conveying cylinder (408). The outer wall of the conveying cylinder (408) is in fit with the inner wall of the sealing cylinder (7).

5. The heavy metal contaminated soil treatment device according to claim 4, characterized in that: The conveying cylinder (408) is rotatably connected to the mounting plate (1) through a bearing. The first material pipe (409) and the second material pipe (410) are fixedly connected to the conveying cylinder (408). The first material pipe (409) and the second material pipe (410) are distributed on the conveying cylinder (408) at equal angles. The first material pipe (409) corresponds to the third material pipe (8) one by one. The second material pipe (410) corresponds to the fourth material pipe (9) one by one. The first material pipe (409), the second material pipe (410), the third material pipe (8), and the fourth material pipe (9) have the same diameter. The cutting blades (413) are distributed on the bottom end face of the drill cylinder (412) at equal angles. Six groups of first crushing blades (411) are provided. The six groups of first crushing blades (411) are distributed on the conveying cylinder (408) at equal angles. Each group of first crushing blades (411) is equidistantly distributed on the conveying cylinder (408).

6. The heavy metal contaminated soil treatment device according to claim 5, characterized in that: The rotating frame (501) is welded and fixed to the driving shaft (402). The rotating frame (501) is rotatably connected to the first sealing plate (502) through a sealing bearing. The ends of the liquid guide pipe (12) and the gas guide pipe (16) are both fixedly connected to the first sealing plate (502). The rotating frame (501) is rotatably connected to the first connecting pipe (503) through a sealing bearing. The top end of the first connecting pipe (503) is welded and fixed with a circular gear (504). The circular gear (504) is meshed and connected with an internal gear (505). The internal gear (505) is welded and fixed to the inner top end face of the fixed frame (3). The first connecting pipes (503) are distributed on the rotating frame (501) at equal angles. The first connecting pipes (503) correspond to the circular gears (504) one by one. The second connecting pipes (508) are distributed on the first connecting pipes (503) at equal angles. The second through holes (509) are equidistantly distributed on the second connecting pipes (508).

7. A heavy metal contaminated soil treatment device according to claim 6, characterized in that: The second crushing blades (512) are welded and fixed to the turntable (511). The third crushing blades (514) are welded and fixed to the first material guiding plate (513). The fourth crushing blades (516) are welded and fixed to the second material guiding plate (515). The fixed rods (517) are welded and fixed to the bottom end face of the turntable (511). The bottom ends of the fixed rods (517) are welded and fixed with push rods (518). The fixed rods (517) are distributed on the bottom end face of the turntable (511) at equal angles. The fixed rods (517) correspond to the push rods (518) one by one. The push rods (518) are in fit with the top end face of the second filter plate (6).

8. A heavy metal contaminated soil treatment device according to claim 7, characterized in that: The turntable (511), the first material guiding plate (513) and the second material guiding plate (515) are all annular. The cross-sections of the turntable (511), the first material guiding plate (513) and the second material guiding plate (515) are isosceles trapezoids. The second crushing blades (512) are equally angularly distributed on the inclined surfaces on both sides of the turntable (511). The third crushing blades (514) are equally angularly distributed on the bottom inclined surface of the first material guiding plate (513). The fourth crushing blades (516) are equally angularly distributed on the bottom inclined surface of the second material guiding plate (515). The second crushing blades (512) are staggeredly distributed with the third crushing blades (514) and the fourth crushing blades (516) respectively.

9. The heavy metal contaminated soil treatment device according to claim 2, wherein: A liquid inlet pipe (11) is fixedly connected to the top of the storage tank (10). An air inlet pipe (15) is fixedly connected to the top of the heat insulation box (14). A water pump (13) is flange-connected to the liquid guide pipe (12). An air pump (17) is flange-connected to the air guide pipe (16). An electric heating plate (18) is fixedly installed in the heat insulation box (14). Drain pipes (19) are fixedly connected to both sides of the bottom of the treatment cylinder (2). Positioning grooves (20) are formed through the front and rear sides of the mounting plate (1). Hand-holding grooves (25) are formed through the left and right sides of the mounting plate (1).

10. A heavy metal contaminated soil treatment device according to claim 9, characterized in that: A magnetic frame (21) is fixedly connected in the positioning groove (20). A collection box (22) is magnetically adsorbed and connected in the magnetic frame (21). A slot (23) is formed through the top side end of the collection box (22). The drain pipe (19) is slidably connected through the slot (23). Hydraulic rods (26) are fixedly installed on the left and right sides of the mounting plate (1). The bottom ends of the hydraulic rods (26) are fixedly connected to a support frame (27). A pressing wheel (28) is rotatably connected in the support frame (27).

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