A circulating type heavy metal soil pollution in-situ remediation device

Abstract

The application discloses a circulating heavy metal soil pollution in-situ remediation equipment and relates to the technical field of soil remediation equipment. The equipment comprises a mobile body, a suction pump and a liquid medicine tank. A fixing frame is arranged on the left side of the upper end of the mobile body. An adjusting frame is rotatably connected to the round hole of the fixing frame through a motor. A connecting arm is rotatably connected to the oil pressure rod two through the oil pressure rod one in the front and rear rod wall sliding grooves on the upper end of the adjusting frame. The output end of the oil pressure rod two is rotatably connected to the lower end protruding block of the connecting arm. The mobile body, the conveying mechanism, the digging bucket and the screen frame are cooperatively arranged, so that the digging, crushing and screening of the contaminated soil can be quickly completed before soil leaching and remediation. The adjusting screw rod, the sleeve assembly and the rotating assembly are cooperatively arranged, so that the contaminated soil can be fully mixed with the liquid medicine and the solid-liquid separation of the remediated soil can be quickly completed.

Description

Technical Field

[0001] This invention relates to the field of soil remediation equipment technology, specifically a circulating in-situ remediation equipment for heavy metal soil pollution. Background Technology

[0002] In heavy metal contaminated soil remediation, various methods are used depending on different geological conditions, soil environment, and degree of contamination, including redox remediation, vegetation remediation, soil leaching remediation, and thermal treatment remediation. These methods can be broadly classified into two categories: in-situ remediation and ex-situ remediation. Among them, soil leaching remediation is widely used because the chemical solution is thoroughly stirred and penetrates, allowing heavy metals to desorb from soil particles and transfer to the chemical solution.

[0003] However, most existing soil washing remediation methods are ex-situ remediation, requiring the coordinated operation of excavation equipment, crushing and screening equipment, mixing and dewatering equipment, and wastewater treatment. This results in traditional in-situ remediation methods having a long onset time and poor effectiveness in soil remediation operations where the contact time between the soil contaminant and the soil is short and the penetration is shallow. Furthermore, when using washing remediation, the equipment scheduling, installation, and site setup time are lengthy, which can easily lead to further penetration of the contaminant, affecting remediation efficiency. Therefore, it is necessary to solve the problem of how to optimize the combination of equipment used in soil washing remediation according to the operational process to quickly complete in-situ soil washing remediation. Summary of the Invention

[0004] The purpose of this invention is to provide a circulating heavy metal soil pollution in-situ remediation device to solve the problems mentioned in the background. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a circulating heavy metal soil pollution in-situ remediation device, comprising a mobile body, a suction pump, and a chemical tank. A fixed frame is installed on the upper left side of the mobile body. An adjusting frame is rotatably connected to the fixed frame through a motor in the circular hole of the fixed frame. A connecting arm is rotatably connected to the adjusting frame through a hydraulic rod in the sliding groove of the upper front and rear rod walls. A hydraulic rod is rotatably connected to the adjusting frame through a central protrusion. The lower protrusion of the connecting arm is rotatably connected to the output end of the hydraulic rod. A conveying mechanism is installed between the connecting arms. A digging bucket is fixed on the left side of the connecting arm. A digging roller is rotatably connected horizontally below the left side of the digging bucket. A crushing roller is rotatably connected vertically inside the digging bucket. A screen frame is fixed on the upper right side of the fixed frame. A vibrator is fixed on the top of the screen frame. A feeding hopper is installed on the screen frame. Two sliding grooves are opened on the upper surface of the mobile body. Two adjusting threaded rods are rotatably connected to the rear sliding grooves through motors on the left and right sides, respectively. A sleeve assembly and a rotating assembly are slidably connected to the sliding grooves through the two adjusting threaded rods, respectively.

[0006] Preferably, a suction pump and a medicine tank are installed sequentially from front to back on the right side of the front operating room of the mobile body. The suction pump is connected to the medicine tank through a pipe, and the upper end of the suction pump is connected to the sleeve assembly through a flexible hose.

[0007] Preferably, a drive mechanism is provided inside the top of the excavator bucket, and both the tunneling roller and the crushing roller are connected to the drive mechanism inside the excavator bucket.

[0008] Preferably, the screen inside the screen frame is tilted backward, and the position of the discharge port at the lower end of the feed hopper corresponds to the initial position of the sleeve assembly and the rotating assembly.

[0009] Preferably, the sleeve assembly includes a sliding seat, which is slidably installed in a slide groove through a left-side adjusting threaded rod. A barrel body is fixed to the upper end of the sliding seat, and a rotating sleeve is rotatably connected to the left inner wall of the barrel body. Multiple connecting pipes are arranged in a circumferential array on the outer side of the rotating sleeve.

[0010] Preferably, the connecting tube has multiple drainage micro-holes arranged circumferentially on its outer side, which are used for injecting and drawing out the medicine.

[0011] Preferably, the slide frame one includes a slide frame one, the inner discharge cylinder is slidably installed in the slide groove one via the right-side adjusting threaded rod, the left side of the slide frame one disc is rotatably connected to the inner discharge cylinder, the inner discharge cylinder is movably disposed inside the barrel one, the left end of the outer side of the inner discharge cylinder is fixed with a toothed ring, the toothed ring is meshed with a toothed disc, the toothed disc is rotatably installed on the top rear side of the slide frame one via a motor, the slide frame one is rotatably connected to a transmission rod via a right-side motor, the transmission rod is rotatably disposed inside the inner discharge cylinder.

[0012] Preferably, the transmission rod is slidably disposed inside the rotating sleeve, and the openings at the left end of the transmission rod and the right end of the rotating sleeve are both hexagonal in design. The transmission rod is used to rotate the rotating sleeve synchronously.

[0013] Preferably, the outer side of the inner discharge cylinder is designed with a notch for feeding material. The left end of the inner discharge cylinder is designed with a slope for sliding against the inner wall of the barrel. The maximum material holding volume of the inner discharge cylinder is proportional to the maximum liquid volume in the liquid tank. The top and front of the liquid tank are respectively provided with an injection port and a discharge port.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention integrates the excavation bucket and conveying mechanism on a mobile body. When rapidly purifying shallow surface soil contamination, the mobile body slides in conjunction with the drive mechanism inside the excavation bucket, driving the excavation roller and crushing roller to quickly excavate and crush the soil. Then, the connecting arm and the conveying mechanism in the excavation bucket quickly send the crushed contaminated soil into the screen frame, where a vibrator performs rapid screening. This allows the equipment to quickly complete the excavation, crushing, conveying, and screening of contaminated soil. For soil with a short contamination period or shallow contamination source, this invention can quickly complete the preparatory steps before leaching and remediation operations.

[0015] This invention utilizes the sliding fit between the barrel body and the inner discharge cylinder to allow for rapid filling of the inner discharge cylinder. Through the coordination of a rotating sleeve, connecting pipe, suction pump, and chemical tank, chemical solution can be injected or drawn into the inner discharge cylinder. The rotation of the inner discharge cylinder within the barrel body, along with the rotation of the rotating sleeve driven by the transmission rod within the inner discharge cylinder, ensures thorough mixing of the contaminated soil and chemical solution. The rapid rotation of the inner discharge cylinder, combined with the suction pump drawing out the chemical solution adsorbing the contaminant through the connecting pipe, rapidly separates the soil from the chemical solution. This chemical solution process is then repeated with clean water, quickly completing the cleaning and purification of the contaminated soil. This allows a single device to rapidly complete multiple steps in the contaminated soil rinsing process, significantly improving work efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall front view of the present invention; Figure 2 This is a schematic diagram of the overall rear view structure of the present invention; Figure 3 This is a schematic diagram of the structure of the fixing frame, adjusting frame, connecting arm, conveying mechanism and digging bucket of the present invention; Figure 4 This is a schematic diagram of the structure of the screen frame, vibrator, and feed hopper of the present invention; Figure 5 This is a rear view structural diagram of the movable body, adjusting threaded rod, sleeve assembly, rotating assembly, suction pump, and medicine tank of the present invention; Figure 6 This is a front view structural diagram of the movable body, adjusting threaded rod, sleeve assembly, rotating assembly, suction pump, and medicine tank of the present invention; Figure 7 This is a schematic diagram of the separate structure of the sleeve assembly and the rotating assembly of the present invention; Figure 8 for Figure 7 Enlarged view of point A in the middle; Figure 9 This is a cross-sectional view of the sleeve assembly of the present invention; Figure 10 This is a schematic diagram of the disassembled inner cylinder structure of the present invention.

[0017] In the diagram: 1. Moving body; 2. Fixed frame; 3. Adjusting frame; 31. Hydraulic rod one; 32. Hydraulic rod two; 4. Connecting arm; 5. Conveying mechanism; 6. Digging bucket; 7. Digging roller; 8. Crushing roller; 9. Screen frame; 10. Vibrator; 11. Feed hopper; 12. Slide chute one; 13. Adjusting threaded rod; 14. Sleeve assembly; 141. Sliding seat; 142. Barrel one; 143. Rotating sleeve; 144. Connecting pipe; 15. Rotating assembly; 151. Slide one; 152. Discharge inner cylinder; 153. Gear ring; 154. Gear disc; 155. Transmission rod; 16. Suction pump; 17. Liquid tank. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0019] Please see Figures 1 to 7 This invention provides a technical solution: a circulating heavy metal soil pollution in-situ remediation device, comprising a mobile body 1, a suction pump 16, and a chemical tank 17. A fixed frame 2 is installed on the upper left side of the mobile body 1. An adjusting frame 3 is rotatably connected to the circular hole of the fixed frame 2 via a motor. A connecting arm 4 is rotatably connected to the sliding groove of the front and rear rod walls of the upper end of the adjusting frame 3 via a hydraulic rod 31. A hydraulic rod 32 is rotatably connected to the central protrusion at the upper end of the adjusting frame 3. The lower protrusion of the connecting arm 4 is rotatably connected to the output end of the hydraulic rod 32. A conveying mechanism 5 is installed between the connecting arms 4. A digging bucket 6 is fixed to the left side of the connecting arm 4. A digging roller 7 is rotatably connected horizontally to the lower left side of the digging bucket 6. A crushing roller 8 is rotatably connected vertically inside the digging bucket 6. A driving mechanism is provided in the top of the digging bucket 6. Both the digging roller 7 and the crushing roller 8 are connected to the inside of the digging bucket 6. The drive mechanism is connected, and a screen frame 9 is fixed on the upper right side of the fixed frame 2. A vibrator 10 is fixed on the top of the screen frame 9. A feed hopper 11 is installed on the screen frame 9. Two slide grooves 12 are opened on the upper surface of the mobile body 1. Two adjusting threaded rods 13 are connected to the rear slide groove 12 by the left and right motors respectively. A sleeve assembly 14 and a rotating assembly 15 are slidably connected to the slide groove 12 by the two adjusting threaded rods 13 respectively. The screen in the screen frame 9 is tilted backward. The position of the discharge port at the lower end of the feed hopper 11 corresponds to the initial position of the sleeve assembly 14 and the rotating assembly 15. A suction pump 16 and a medicine tank 17 are installed from front to back on the right side of the front operating room of the mobile body 1. The suction pump 16 is connected to the medicine tank 17 through a pipe. The upper end of the suction pump 16 is connected to the sleeve assembly 14 through a hose. Before in-situ leaching remediation of contaminated soil, the drive mechanism and conveying mechanism 5 inside the excavator bucket 6 are activated, driving the excavator bucket 6 and the tunneling roller 7 to rotate. The controller in the operating room adjusts the vertical position of the connecting arms 4 in the sliding grooves on both sides of the fixed frame 2 via hydraulic rod 31, and adjusts the tilt angle of the excavator bucket 6 via hydraulic rod 32, allowing the tunneling roller 7 to advance to the corresponding depth of the contaminated soil in the contaminated area. Simultaneously, the slow movement of the moving body 1 and the rotation adjustment of the adjusting frame 3 by the motor, combined with the rotation of the tunneling roller 7, push the soil upwards. The soil at the excavation location is crushed by the turning and the rotation of the crushing roller 8, and the crushed contaminated soil falls onto the conveyor belt in the conveying mechanism 5 and is sent into the screen frame 9. Then, the vibrator 10 is turned on to vibrate the screen frame 9. When the screen frame 9 vibrates and screens the crushed contaminated soil that enters the screen, larger solid blocks fall from the back of the screen frame 9 through the inclined screen. The screened contaminated soil falls directly into the feed hopper 11 and then into the rotating component 15 below through the discharge port of the feed hopper 11, quickly completing the excavation crushing and screening of the contaminated soil. Example 2

[0020] Based on Example 1, please refer to Figures 1 to 10Inside the chute 12, a sleeve assembly 14 and a rotating assembly 15 are slidably connected via two adjusting threaded rods 13. The screen in the screen frame 9 is tilted backward. The discharge port at the lower end of the feed hopper 11 corresponds to the initial positions of the sleeve assembly 14 and the rotating assembly 15. The sleeve assembly 14 includes a sliding seat 141, which is slidably installed inside the chute 12 via the left adjusting threaded rod 13. A barrel 142 is fixed to the upper end of the sliding seat 141. A rotating sleeve 143 is rotatably connected to the left inner side wall of the barrel 142. 3. Multiple connecting pipes 144 are arranged in a circumferential array on the outer side. Multiple drainage micro-holes are arranged circumferentially on the outer side of the connecting pipes 144 for the injection and extraction of the medicine. The slide frame 151 includes the slide frame 151. The inner discharge cylinder 152 is slidably installed in the slide groove 12 via the right-side adjusting threaded rod 13. The left side of the disc of the slide frame 151 is rotatably connected to the inner discharge cylinder 152. The inner discharge cylinder 152 is movably set inside the barrel body 142. A toothed ring 153 is fixed to the left side of the outer side of the inner discharge cylinder 152. The toothed ring 153 meshes with the inner discharge cylinder 152. A geared disc 154 is connected to the slide 151 via a motor. The geared disc 154 is mounted on the top rear side of the slide 151 via a right-side motor. The slide 151 is connected to a transmission rod 155 via a right-side motor. The transmission rod 155 is rotatably positioned inside the discharge inner cylinder 152 and slidably positioned inside the rotating sleeve 143. The left end of the transmission rod 155 and the right end opening of the rotating sleeve 143 are both hexagonal. The transmission rod 155 is used to synchronously rotate the rotating sleeve 143. A suction pump 16 and a... are installed sequentially from front to back on the right side of the front operating chamber of the moving machine body 1. The medicine tank 17 is connected to the suction pump 16 via a pipe. The outer side of the inner discharge cylinder 152 has a notch for feeding. The left end of the inner discharge cylinder 152 is sloped to allow it to slide against the inner wall of the barrel 142. The maximum capacity of the inner discharge cylinder 152 is proportional to the maximum capacity of the medicine in the medicine tank 17. The top and front of the medicine tank 17 are respectively equipped with an injection port and a discharge port. The upper end of the suction pump 16 is connected to the sleeve assembly 14 via a flexible hose. When performing soil leaching remediation, the stepper motor drives the adjusting threaded rod 13 to rotate in the opposite direction. At this time, the sliding seat 141 drives the barrel 142 to slide to the right in the chute 12, so that the barrel 142 and the inner discharge cylinder 152 are aligned and reset. Then, the operator starts the suction pump 16 through the controller to draw the liquid from the liquid tank 17 into the rotating sleeve 143 through the hose, and injects it into the contaminated soil through the connecting pipe 144 on the rotating sleeve 143. When the liquid in the liquid tank 17 is completely injected into the inner discharge cylinder 152, the motor connected to the gear plate 154 and the transmission rod 155 is turned on to rotate in the same direction. This makes the gear plate 154 drive the gear ring 153 and the inner discharge cylinder 152 to rotate in the opposite direction to the rotation direction of the rotating sleeve 143 driven by the transmission rod 155 in the barrel 142. The controller adjusts the rotation of the motor to fully stir the contaminated soil and liquid in the inner discharge cylinder 152. After the chemical solution has fully adsorbed the heavy metals in the contaminated soil, the motor connected to the transmission rod 155 is turned off, the speed of the motor connected to the gear plate 154 is increased, the dewatering mode of the inner discharge cylinder 152 is turned on, and the suction pump 16 is turned on to suction in reverse, so that the chemical solution in the inner discharge cylinder 152 is sucked into the chemical solution tank 17 through the rotating sleeve 143 and the hose by the connecting pipe 144. Then, the chemical solution that has adsorbed heavy metals is discharged into the sewage collection area through the hose by opening the discharge port on the front side of the chemical solution tank 17. After the contaminated soil has completed the chemical adsorption and dewatering, clean water is injected through the top of the chemical solution tank 17, and the above chemical solution injection, stirring and dewatering operations are repeated to perform a second cleaning and dewatering of the contaminated soil.

[0021] Working Principle: When using this circulating heavy metal soil pollution in-situ remediation equipment, the operator first moves the mobile body 1 to the polluted area through the control room. Then, according to the infiltration depth of the pollution source in the soil of the polluted area, the drive mechanism and conveying mechanism 5 in the excavation bucket 6 are activated, driving the excavation bucket 6 and the tunneling roller 7 to rotate. Through the controller device in the control room, the upper and lower positions of the connecting arms 4 in the sliding grooves of the two side walls of the fixed frame 2 are adjusted accordingly through the hydraulic rod 31. Then, the tilt angle of the excavation bucket 6 is adjusted accordingly through the hydraulic rod 32, so that the tunneling roller 7 tunnels to the corresponding depth of the polluted soil in the polluted area. At the same time, the slow movement of the mobile body 1 and the rotation adjustment of the adjustment frame 3 by the motor, together with the rotation of the tunneling roller 7, throw the soil upwards, and the rotation of the crushing roller 8 crushes the soil at the excavation position. The crushed polluted soil falls onto the conveyor belt in the conveying mechanism 5 and is sent into the screen frame 9 by the conveyor belt, completing the soil crushing and conveying operation.

[0022] Next, the vibrator 10 is turned on to vibrate the screen frame 9, and at the same time, the stepper motor is turned on to drive the adjusting screw rod 13 to rotate, so that the sliding seat 141 drives the barrel 142 to slide to the left in the slide groove 12, and the discharge inner cylinder 152 is exposed. When the screen frame 9 vibrates and screens the crushed contaminated soil that enters the screen, the larger solid blocks fall from the back of the screen frame 9 through the inclined screen. The screened contaminated soil falls directly into the feed hopper 11 and falls into the discharge inner cylinder 152 below through the discharge port of the feed hopper 11. When the contaminated soil in the discharge barrel is gradually filled, the movement of the moving body 1 is stopped, and the drive mechanism and conveying mechanism 5 in the digging bucket 6 are turned off, completing the screening of contaminated soil and the loading operation of the discharge inner cylinder 152.

[0023] Then, by turning on the stepper motor to drive the adjusting threaded rod 13 to rotate in the opposite direction, the sliding seat 141 drives the barrel 142 to slide to the right in the slide groove 12, so that the barrel 142 and the inner discharge cylinder 152 are aligned and reset. Then, the operator turns on the suction pump 16 through the controller to draw the liquid medicine in the liquid medicine tank 17 into the rotating sleeve 143 through the hose, and injects it into the contaminated soil through the connecting pipe 144 on the rotating sleeve 143. After the liquid medicine in the liquid medicine tank 17 is completely injected into the inner discharge cylinder 152, the motor connected to the gear plate 154 and the transmission rod 155 is turned on to rotate in the same direction. This makes the gear plate 154 drive the gear ring 153 and the inner discharge cylinder 152 to rotate in the opposite direction to the rotation direction of the rotating sleeve 143 driven by the transmission rod 155 in the barrel 142. The device adjusts the motor rotation to fully stir the contaminated soil and chemical solution in the inner discharge cylinder 152. After the chemical solution has fully adsorbed the heavy metals in the contaminated soil, the motor connected to the transmission rod 155 is turned off, and the speed of the motor connected to the gear plate 154 is increased to start the dewatering mode of the inner discharge cylinder 152. Then, the suction pump 16 is turned on to suck in reverse, so that the chemical solution in the inner discharge cylinder 152 is sucked into the chemical solution tank 17 through the rotating sleeve 143 and the hose by the connecting pipe 144. Then, the chemical solution that has adsorbed heavy metals is discharged into the sewage collection area through the hose by opening the discharge port on the front side of the chemical solution tank 17. After the contaminated soil has completed the chemical adsorption and dehydration, clean water is injected through the top of the chemical solution tank 17. The above chemical solution injection, stirring and dewatering operations are repeated to perform secondary cleaning and dehydration of the contaminated soil.

[0024] Then, the stepper motor drives the adjusting screw rod 13 to rotate, causing the slide 151 to drive the discharge inner cylinder 152 to slide to the right in the slide groove 12. With the help of the toothed disc 154 motor, the toothed ring 153 and the discharge inner cylinder 152 rotate in the slide 151, so that the notch of the discharge inner cylinder 152 is inverted and facing downwards, and the purified soil is poured out. Then, the inlet motor drives the adjusting screw rod 13 to rotate in the opposite direction, causing the slide 151 and the discharge inner cylinder 152 to reset, and the drive mechanism and conveying mechanism 5 in the excavation bucket 6 are restarted. The above operation is repeated to continuously purify the soil in the polluted area.

[0025] 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 cyclic heavy metal soil pollution in-situ remediation device, characterized in that: The device includes a mobile body (1), a suction pump (16), and a liquid tank (17). A fixed frame (2) is installed on the upper left side of the mobile body (1). An adjusting frame (3) is rotatably connected to the round hole of the fixed frame (2) via a motor. A connecting arm (4) is rotatably connected to the sliding groove of the front and rear rod walls of the upper end of the adjusting frame (3) via a hydraulic rod (31). A hydraulic rod (32) is rotatably connected to the central protrusion at the upper end of the adjusting frame (3). The lower protrusion of the connecting arm (4) is rotatably connected to the output end of the hydraulic rod (32). A conveying mechanism (5) is installed between the connecting arms (4). A digging bucket (6) is fixed to the left side of the connecting arm (4). A digging roller (7) is horizontally rotatably connected to the lower left side of the bucket (6). A crushing roller (8) is vertically rotatably connected inside the digging bucket (6). A screen frame (9) is fixed to the upper right side of the fixed frame (2). A vibrator (10) is fixed to the top of the screen frame (9). A feed hopper (11) is installed on the screen frame (9). Two sliding grooves (12) are opened on the upper surface of the mobile body (1). Two adjusting threaded rods (13) are rotatably connected to the sliding groove (12) on the rear side through the left and right motors respectively. A sleeve assembly (14) and a rotating assembly (15) are slidably connected to the sliding groove (12) through the two adjusting threaded rods (13) respectively. The sleeve assembly (14) includes a sliding seat (141), which is slidably installed in the slide groove (12) via the left adjusting threaded rod (13). A barrel body (142) is fixed at the upper end of the sliding seat (141). A rotating sleeve (143) is rotatably connected to the left side wall of the inner side of the barrel body (142). Multiple connecting pipes (144) are arranged in a circumferential array on the outer side of the rotating sleeve (143). The connecting tube (144) has multiple drainage micro-holes arranged circumferentially on its outer side, which are used for injecting and drawing out the medicine. It also includes a slide frame (151) and a discharge inner cylinder (152). The discharge inner cylinder (152) is slidably installed in the slide groove (12) via the right-side adjusting threaded rod (13). The discharge inner cylinder (152) is rotatably connected to the left side of the disc of the slide frame (151). The discharge inner cylinder (152) is movably arranged inside the barrel body (142). A toothed ring (153) is fixed to the left side of the outer side of the discharge inner cylinder (152). The toothed ring (153) is meshed with a toothed disc (154). The toothed disc (154) is rotatably installed on the top rear side of the slide frame (151) via a motor. The slide frame (151) is rotatably connected to a transmission rod (155) via the right-side motor. The transmission rod (155) is rotatably arranged inside the discharge inner cylinder (152). The transmission rod (155) is slidably disposed inside the rotating sleeve (143). The left end of the transmission rod (155) and the right end of the rotating sleeve (143) are both hexagonal in design. The transmission rod (155) is used to rotate the rotating sleeve (143) synchronously. The outer side of the inner discharge cylinder (152) is designed with a notch for feeding material. The left end of the inner discharge cylinder (152) is designed with a slope. The slope of the left end of the inner discharge cylinder (152) is used to slide against the inner wall of the barrel (142). The maximum material holding volume of the inner discharge cylinder (152) is proportional to the maximum liquid volume in the liquid tank (17). The top and front of the liquid tank (17) are respectively provided with an injection port and a discharge port.

2. A cyclic heavy metal soil pollution in-situ remediation device according to claim 1, characterized in that: The mobile body (1) has a suction pump (16) and a medicine tank (17) installed sequentially from front to back on the right side of the front operating room. The suction pump (16) is connected to the medicine tank (17) through a pipe, and the upper end of the suction pump (16) is connected to the sleeve assembly (14) through a hose.

3. A cyclic heavy metal soil pollution in-situ remediation device according to claim 2, characterized in that: A drive mechanism is provided inside the top of the excavating bucket (6), and the tunneling roller (7) and the crushing roller (8) are both connected to the drive mechanism inside the excavating bucket (6).

4. The circulating heavy metal soil pollution in-situ remediation equipment according to claim 3, characterized in that: The screen inside the screen frame (9) is tilted backward, and the position of the discharge port at the lower end of the feed hopper (11) corresponds to the initial position of the sleeve assembly (14) and the rotating assembly (15).

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