Restoration device for heavy metal polluted soil body and use method thereof

Abstract

The invention relates to a remediation device for heavy metal contaminated soil, and discloses a remediation device for leading in contaminated soil by utilizing a soil crushing roller, overturning and stirring in cooperation with a scraper, mixing the soil and a remediation agent, and directly discharging the soil and the remediation agent to return to the ground, and a use method of the remediation device. And after being mixed with a repairing agent, the mixture is directly discharged to the ground, so that repairing continuity is guaranteed. The excavator is characterized in that the bucket is arranged at one end of the main body box, the bucket is formed by bending an iron sheet at one time, the thickness of the bucket is gradually reduced from one end to the other end, the two rotating shafts are arranged on the two sides of the bucket respectively, bearings are arranged between the rotating shafts and the bucket, and the two ends of the rotating shafts are located on the inner side and the outer side of the bucket respectively. The two soil crushing rollers are arranged at one ends of the two rotating shafts respectively and located in the bucket, the transmission wheels are arranged at the other ends of the rotating shafts and located on the outer side of the bucket, the two retainers are arranged in the bucket respectively and connected with the two soil crushing rollers through the multiple soil crushing shifting plates respectively, and the two retainers are connected through the multiple connecting rods.

Description

Technical Field

[0001] A soil remediation device for heavy metal contaminated soil and its use method according to the present invention relates to a soil remediation device that directly takes soil into a mixture with a remediation agent and returns it to the ground when remediating heavy metal contaminated soil, belonging to the field of soil remediation. In particular, it relates to a soil remediation device and its use method that uses a soil crushing roller to introduce contaminated soil, cooperates with a scraper to turn and stir, so that the soil and the remediation agent are mixed, and is directly discharged and returned to the ground. Background Art

[0002] At present, due to industrial production factors in some areas, the heavy metal content in the soil exceeds the standard, affecting soil safety, exceeding the self-purification ability of the soil, being seriously polluted, and even causing regional diseases. Therefore, soil remediation is required. Mainly, a remediation agent is mixed with the soil to remove heavy metal ions in the soil. However, when the existing equipment mixes the remediation agent, the effect is poor, the efficiency is low, and the soil cannot be directly introduced into the mixture and then directly discharged back to the ground. The soil treatment capacity is limited, and continuous operation for remediation treatment cannot be achieved.

[0003] Publication No. CN108672480A discloses a soil remediation device and its remediation method, including several groups of soil remediation box groups arranged in sequence along a vertical line; each soil remediation box group includes a soil remediation culture box and a soil crushing box, and the soil remediation culture box belonging to the same soil remediation box group is arranged directly above the soil crushing box; the soil remediation culture box can pour the soil inside it into the soil crushing box by flipping, and after being crushed by the soil crushing box, it is poured into the soil remediation culture box of the next soil remediation box group. This invention remediates the soil through a multi-layer structure and uses earthworms to purify the soil. It cannot operate continuously and cannot directly introduce the soil into the mixture and then discharge it. The treatment capacity is small.

[0004] Publication No. CN207723183U discloses a new type of soil remediation device, including a soil remediation device connecting plate and a main bearing of the soil remediation device. The surface of the soil remediation device connecting plate is provided with soil remediation device connection holes. One side of the soil remediation device connecting plate is provided with a support column, and a trapezoidal connection groove is arranged inside one side of the soil remediation device connecting plate. One side of the soil detector battery box is provided with a soil remediation box. When this device is processing, the processing continuity is poor and it cannot operate continuously online. Summary of the Invention

[0005] To improve the above situation, a remediation device for heavy metal contaminated soil provided by the present invention provides a remediation device and its usage method that uses a soil crushing roller to introduce the contaminated soil, and cooperates with a scraper to turn and stir, so that the soil and the remediation agent are mixed and directly discharged back to the ground. After being mixed with the remediation agent, it is directly discharged back to the ground to ensure the continuity of remediation.

[0006] The repair device for heavy metal contaminated soil of the present invention is realized as follows: The heavy metal contaminated soil repair device of the present invention is composed of a main body box, a bucket, a soil crushing roller, a screening cylinder, a scraper, a transmission cylinder, a driving motor, a belt, a transmission roller, a driving wheel, a fixing frame, a soil discharge groove, a support ring, a transmission wheel, a rotating shaft, a soil crushing deflector, a retaining frame, a connecting rod, a bearing, a support arm, a stirring plate and a transmission shaft. The bucket is placed at one end of the main body box. The bucket is formed by bending iron sheet once, and the thickness of the bucket gradually decreases from one end to the other end. Two rotating shafts are respectively placed on both sides of the bucket. Bearings are arranged between the rotating shafts and the bucket. The two ends of the rotating shafts are respectively located inside and outside the bucket. Two soil crushing rollers are respectively placed at one end of the two rotating shafts and are respectively located inside the bucket. Transmission wheels are arranged at the other end of the rotating shafts and are located outside the bucket. Two retaining frames are respectively placed inside the bucket and are respectively connected to the two soil crushing rollers through a plurality of soil crushing deflectors. The two retaining frames are connected through a plurality of connecting rods. The soil crushing deflector is a spiral plate. A forked groove is formed on the soil crushing deflector, and one end of the forked groove extends to one end of the soil crushing deflector. Teeth are arranged on the soil crushing deflector, and the teeth are triangular teeth. A plurality of support rings are respectively placed inside the main body box. A gap is arranged between the outer side of the support ring and the inner wall of the main body box. The driving motor is placed on the end face of the other end of the main body box. One end of the motor shaft of the driving motor passes through the other end of the main body box through a bearing and is placed inside the main body box. The driving wheel is arranged on the motor shaft and is located outside the main body box. The transmission shaft is placed inside the support ring, and one end of the transmission shaft is connected to one end of the motor shaft. The transmission cylinder is sleeved on the transmission shaft, and the transmission between the transmission cylinder and the transmission shaft is carried out through a planetary gear set. The support arm is placed on the other end of the transmission shaft through a bearing. One end of a plurality of stirring plates is equidistantly placed on the support arm. The stirring plate is an L-shaped plate, and a plurality of stirring protrusions are arranged on the surface. The screening cylinder is sleeved on the transmission shaft and one end of the screening cylinder is connected to the transmission shaft. The stirring plate is located inside the screening cylinder. A plurality of screening holes are formed on the cylinder wall of the screening cylinder, and the diameter of the screening holes gradually decreases from the outside to the inside. The diameter of the screening cylinder is larger than the diameter of the transmission cylinder and is twice the diameter of the transmission cylinder. A plurality of scrapers are respectively placed on the inner ring of the support ring. The scrapers are respectively connected to the inner ring of the plurality of support rings. One end of the scraper is connected to the outer wall of the transmission cylinder through a support rod. The scraper is located outside the screening cylinder. The scraper is a spiral structure. A plurality of scraping teeth are arranged on the surface of the scraper. Two groups of support frames are respectively placed on both sides of the other end of the main body box. Two transmission rollers are respectively rotatably placed on the two groups of support frames. Each group of support frames is composed of two support frames. An annular groove is formed on the transmission roller. The belt is sleeved on the driving wheel, and both ends of the belt respectively bypass the two transmission rollers and then are respectively sleeved on the transmission wheels on the two rotating shafts. The belt is located in the groove on the transmission roller. A soil discharge groove is formed at the other end of the main body box. A fixing frame is placed on the end face of the other end of the main body box; A spraying assembly is installed on the main body box. The spraying assembly includes a water storage tank which is installed on the end face of the main body box close to the soil discharge groove. A water pump is installed in the water storage tank. A drain pipe is installed at the bottom of the side wall of the water storage tank. A water valve is installed on the drain pipe. One end of the drain pipe away from the water storage tank is installed with a spray arm, and a plurality of spray heads are installed on the spray arm.

[0007] The present invention also relates to a method for using a remediation device for heavy metal contaminated soil, and the specific steps are as follows:

[0008] (1) First, fix the present invention on a vehicle through a fixing frame, with the bucket located in the forward direction of the vehicle, and put the remediation agent into the screening cylinder.

[0009] (2) The present invention moves along the road surface following the vehicle. The bucket shovels the soil into the bucket. At the same time, the driving motor works, driving the driving shaft and the driving wheel to rotate. The driving wheel drives the soil crushing roller to rotate through a belt, and the soil crushing roller drives a plurality of soil crushing plates to rotate, crushing the soil in the bucket.

[0010] (3) The crushed soil gradually moves into the main body box. The transmission cylinder and the driving shaft are driven by a planetary gear set, and then the driving shaft drives the transmission cylinder to rotate, the driving shaft drives the screening cylinder to rotate, and the screening cylinder and the plurality of stirring plates inside rotate relative to each other, thereby stirring and mixing the remediation agent in the screening cylinder.

[0011] (4) The remediation agent is extruded from the sieve holes on the wall of the screening cylinder and mixed with the soil in the main body box. At the same time, the transmission cylinder drives a plurality of scraping plates to rotate, stirring and mixing the soil and the remediation agent, thereby remediating the soil.

[0012] (5) When the soil moves to the other end of the main body box, it is discharged from the soil discharge groove at the other end of the main body box and returns to the ground.

[0013] Beneficial effects.

[0014] First, it can directly introduce the contaminated soil body and perform crushing and mixing.

[0015] Second, after being mixed with the remediation agent, it is directly discharged back to the ground to ensure the continuity of remediation.

[0016] Third, it can continuously and massively perform the mixing treatment of the soil body.

[0017] Fourth, the structure is simple, it can be installed on different driving devices for operation, and the discharged soil body can be irrigated and watered through the spraying assembly, improving the soil remediation effect. Description of the drawings

[0018] Figure 1This is a three-dimensional structure diagram of a remediation device for heavy metal contaminated soil according to the present invention;

[0019] Figure 2 This is a three-dimensional structure diagram of a remediation device for heavy metal contaminated soil according to the present invention, which only shows the structure at the connection position and the position of the motor;

[0020] Figure 3 This is a three-dimensional structure diagram of a remediation device for heavy metal contaminated soil according to the present invention, which only shows the three-dimensional structure diagram of the soil crushing roller removed;

[0021] Figure 4 This is a three-dimensional structure diagram of the soil crushing roller of a remediation device for heavy metal contaminated soil according to the present invention;

[0022] Figure 5 This is a three-dimensional structure diagram of the mixing structure of a remediation device for heavy metal contaminated soil according to the present invention, which only shows the structural relationship on the transmission cylinder; Figure 6 This is a schematic diagram of the structure of the spraying assembly of the soil crushing roller of a remediation device for heavy metal contaminated soil according to the present invention Figure Ⅰ ; Figure 7 This is a schematic diagram of the structure of the spraying assembly of the soil crushing roller of a remediation device for heavy metal contaminated soil according to the present invention Figure Ⅱ .

[0023] In the attached drawings

[0024] Among them, the parts are: main body box (1), bucket (2), soil crushing roller (3), screening cylinder (4), scraper (5), transmission cylinder (6), drive motor (7), belt (8), transmission roller (9), drive wheel (10), fixing frame (11), soil discharge groove (12), support ring (13), transmission wheel (14), rotating shaft (15), soil crushing paddle (16), cage (17), connecting rod (18), bearing (19), support arm (20), stirring plate (21), transmission shaft (22), water storage tank (23), drain pipe (24), water valve (25), spray arm (26), nozzle (27). Detailed implementation manners

[0026] The repair device for heavy metal contaminated soil of the present invention is realized as follows. It is composed of a main body box (1), a bucket (2), soil crushing rollers (3), a screening cylinder (4), a scraper (5), a transmission cylinder (6), a driving motor (7), a belt (8), a transmission roller (9), a driving wheel (10), a fixing frame (11), a soil discharge chute (12), a support ring (13), a transmission wheel (14), a rotating shaft (15), soil crushing paddles (16), a retaining frame (17), a connecting rod (18), a bearing (19), a support arm (20), a stirring plate (21) and a transmission shaft (22). The bucket (2) is placed at one end of the main body box (1). The bucket (2) is formed by bending iron sheet once, and the thickness of the bucket (2) gradually decreases from one end to the other end. Two rotating shafts (15) are respectively placed on both sides of the bucket (2), and bearings (19) are arranged between the rotating shafts (15) and the bucket (2). The two ends of the rotating shaft (15) are respectively located inside and outside the bucket (2). Two soil crushing rollers (3) are respectively placed at one end of the two rotating shafts (15) and are respectively located inside the bucket (2). A transmission wheel (14) is placed at the other end of the rotating shaft (15) and is located outside the bucket (2). Two retaining frames (17) are respectively placed inside the bucket (2) and are respectively connected to the two soil crushing rollers (3) through a plurality of soil crushing paddles (16). The two retaining frames (17) are connected through a plurality of connecting rods (18). The soil crushing paddle (16) is a spiral plate, and a forked groove is opened on the soil crushing paddle (16), and one end of the forked groove extends to one end of the soil crushing paddle (16). Teeth are arranged on the soil crushing paddle (16), and the teeth are triangular teeth. A plurality of support rings (13) are respectively placed inside the main body box (1), and a gap is arranged between the outer side of the support ring (13) and the inner wall of the main body box (1). The driving motor (7) is placed on the end face of the other end of the main body box (1). One end of the motor shaft of the driving motor (7) passes through the other end of the main body box (1) through a bearing (19) and is placed inside the main body box (1). The driving wheel (10) is placed on the motor shaft and is located outside the main body box (1). The transmission shaft (22) is placed inside the support ring (13), and one end of the transmission shaft is connected to one end of the motor shaft. The transmission cylinder (6) is sleeved on the transmission shaft (22), and the transmission between the transmission cylinder (6) and the transmission shaft (22) is carried out through a planetary gear set. The support arm (20) is placed on the other end of the transmission shaft (22) through a bearing (19). One end of a plurality of stirring plates (21) is placed on the support arm (20) at equal intervals. The stirring plate (21) is an L-shaped plate, and a plurality of stirring protrusions are arranged on the surface. The screening cylinder (4) is sleeved on the transmission shaft (22), and one end of the screening cylinder is connected to the transmission shaft (22). The stirring plate (21) is located inside the screening cylinder (4). A plurality of screening holes are opened on the cylinder wall of the screening cylinder (4), and the diameter of the screening holes gradually decreases from the outside to the inside. The diameter of the screening cylinder (4) is larger than the diameter of the transmission cylinder (6) and is twice the diameter of the transmission cylinder (6). A plurality of scrapers (5) are respectively placed on the inner ring of the support ring (13), and the scrapers (5) are respectively connected to the inner ring of the plurality of support rings (13).One end of the scraping plate (5) is connected to the outer wall of the transmission cylinder (6) through a support rod. The scraping plate (5) is located outside the sieve cylinder (4). The scraping plate (5) is of a spiral structure, and a plurality of scraping teeth are arranged on the surface of the scraping plate (5). Two sets of support frames are respectively arranged on both sides at the other end of the main body box (1). Two transmission rollers (9) are respectively rotatably arranged on the two sets of support frames. Each set of support frames is composed of two support frames. An annular groove is formed in the transmission roller (9). The belt (8) is sleeved on the driving wheel (10), and both ends respectively bypass the two transmission rollers (9) and then are respectively sleeved on the transmission wheels (14) on the two rotating shafts (15). The belt (8) is located in the groove on the transmission roller (9). A soil discharge groove (12) is formed at the other end of the main body box (1), and a fixing frame (11) is arranged on the end surface at the other end of the main body box (1); A spraying assembly is installed on the main body box (1). The spraying assembly includes a water storage tank (23). The water storage tank (23) is installed on the end surface of the main body box (1) close to the soil discharge groove (12). A water pump is installed in the water storage tank (23). A drain pipe (24) is installed at the bottom of the side wall of the water storage tank (23). A water valve (25) is installed on the drain pipe (24). One end of the drain pipe (24) far from the water storage tank (23) is installed with a spray arm (26), and a plurality of spray heads (27) are installed on the spray arm (26).

[0027] The present invention also relates to a use method of a repair device for heavy metal contaminated soil, and the specific steps are as follows:

[0028] (1) First, fix the present invention on a vehicle through the fixing frame (11). The bucket (2) is located in the advancing direction of the vehicle, and a repair agent is placed in the sieve cylinder (4);

[0029] (2) The present invention moves along the road surface following the vehicle. The bucket (2) shovels the soil into the bucket (2). At the same time, the driving motor (7) works. The driving motor (7) drives the transmission shaft (22) and the driving wheel (10) to rotate. The driving wheel (10) drives the soil crushing roller (3) to rotate through the belt (8). The soil crushing roller (3) drives a plurality of soil crushing plates (16) to rotate to crush the soil in the bucket (2);

[0030] (3) The crushed soil gradually moves into the main body box (1). The transmission between the transmission cylinder (6) and the transmission shaft (22) is carried out through a planetary gear set. Further, the transmission shaft (22) drives the transmission cylinder (6) to rotate, and the transmission shaft (22) drives the sieve cylinder (4) to rotate. The sieve cylinder (4) rotates relative to a plurality of stirring plates (21) inside, and further stirs and mixes the repair agent in the sieve cylinder (4);

[0031] (4) The repair agent is extruded from the sieve holes on the wall of the sieve cylinder (4) and mixed with the soil in the main body box (1). At the same time, the transmission cylinder (6) drives a plurality of scraping plates (5) to rotate, stirring and mixing the soil and the repair agent, thereby repairing the soil.

[0032] (5) When the soil moves to the other end of the main body box (1), it is discharged from the soil discharge groove (12) at the other end of the main body box (1) and returns to the ground.

[0033] The bucket (2) is designed to be formed by one-time bending of iron sheet, which can improve the strength of the bucket (2) and avoid damage.

[0034] The bucket (2) is designed with a gradually decreasing thickness from one end to the other end, making the front end of the bucket (2) relatively sharp. Thus, it is convenient to shovel up the soil.

[0035] The soil breaking deflector (16) is provided with forked grooves, and the design that one end of the forked groove extends to one end of the soil breaking deflector (16) can enable the soil to pass through the soil breaking deflector (16) through the forked grooves during rotation, thereby making the moving path of the soil more complex and improving the soil breaking effect.

[0036] The design that the soil breaking deflector (16) is provided with teeth can assist the soil breaking deflector (16) to break the soil and further improve the soil breaking efficiency.

[0037] The teeth are designed as triangular teeth with tips, so as to have a better soil breaking effect.

[0038] The design that there is a gap between the outer side of the support ring (13) and the inner wall of the main body box (1) can prevent the support ring (13) from being hindered by friction with the inner wall of the main body box (1) during rotation.

[0039] The stirring plate (21) is an L-shaped plate, and the design that the surface is provided with a plurality of stirring protrusions can increase the contact area with the repair agent and further improve the stirring efficiency of the repair agent.

[0040] The design that the diameter of the sieve holes gradually decreases from the outside to the inside is convenient for the repair agent in the sieve holes to flow out.

[0041] The design that the surface of the scraping plate (5) is provided with a plurality of scraping teeth can scrape the soil adhered to the wall of the main body box (1) during rotation to avoid blockage in the main body box (1).

[0042] The design of driving the transmission cylinder (6) through the planetary gear set between the transmission shaft (22) can make the rotating speed of the sieve cylinder (4) greater than that of the scraper (5). As a result, the discharge efficiency of the repair agent from the sieve holes is high, and the rotating speed of the scraper (5) is low, which can better mix the repair agent and the soil.

[0043] The cooperation between the soil crushing roller (3) and the bucket (2) can pre-crush the shoveled soil, which is convenient for the subsequent mixing of the repair agent and the soil and improves the repair effect.

[0044] The cooperation between the sieve cylinder (4) and the scraper (5) can directly introduce the soil and mix it with the repair agent, improving the repair efficiency.

[0045] The cooperation between the stirring plate (21) and the sieve cylinder (4) can gradually extrude the repair agent from the sieve cylinder (4), and then continuously repair the soil.

[0046] After the soil is crushed by the soil crushing roller (3), it enters the main body box (1) to be mixed with the repair agent, and finally is discharged from the soil discharge groove (12). This design can continuously operate on the soil, and the treated soil is directly discharged, improving the operation efficiency.

[0047] During the repair, the sieve cylinder (4) rotates, and the sieve cylinder (4) and the stirring plate (21) rotate relative to each other. The design of extruding the repair agent from the sieve holes can continuously discharge the repair agent, and then continuously operate on the soil, improving the repair efficiency.

[0048] The purpose is to use the soil crushing roller (3) to introduce the contaminated soil mass, cooperate with the scraper (5) to turn and stir, so that the soil mass and the repair agent are mixed, and then directly discharged back to the ground.

[0049] The above embodiments are the preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Any ordinary technician in the art can make some improvements without departing from the scope of the present invention. That is, any equivalent improvements made in accordance with the present invention should be covered by the scope of the present invention.

Claims

1. A remediation device for heavy metal contaminated soil, characterized in that: The bucket is placed at one end of the main body box. Two rotating shafts are respectively placed on both sides of the bucket. Bearings are arranged between the rotating shafts and the bucket. The two ends of the rotating shafts are respectively located inside and outside the bucket. Two soil-breaking rollers are respectively placed on one end of the two rotating shafts and are located inside the bucket. Transmission wheels are arranged on the other ends of the rotating shafts and are located outside the bucket. Two cages are respectively placed inside the bucket and are respectively connected to the two soil-breaking rollers through a plurality of soil-breaking paddles. The two cages are connected through a plurality of connecting rods. A plurality of support rings are respectively placed inside the main body box. The driving motor is placed on the end face of the other end of the main body box. One end of the motor shaft of the driving motor passes through the other end of the main body box through a bearing and is placed inside the main body box. The driving wheel is placed on the motor shaft and is located outside the main body box. The transmission shaft is placed inside the support ring and one end of it is connected to one end of the motor shaft. The transmission cylinder is sleeved on the transmission shaft, and the transmission between the transmission cylinder and the transmission shaft is carried out through a planetary gear set. The support arm is placed on the other end of the transmission shaft through a bearing. One end of a plurality of stirring plates is placed on the support arm at equal intervals. The sieve cylinder is sleeved on the transmission shaft and one end of it is connected to the transmission shaft. The stirring plates are located inside the sieve cylinder. A plurality of scraping plates are respectively placed on the inner ring of the support ring. The scraping plates are respectively connected to the inner ring of a plurality of support rings. One end of the scraping plate is connected to the outer wall of the transmission cylinder through a support rod. The scraping plates are located outside the sieve cylinder. The scraping plates are of a spiral structure, and a plurality of scraping teeth are arranged on the surface of the scraping plates. Two groups of support frames are respectively placed on both sides of the other end of the main body box. Two transmission rollers are respectively rotatably placed on the two groups of support frames. Each group of support frames is composed of two support frames. Annular grooves are formed on the transmission rollers. The belt is sleeved on the driving wheel, and both ends of the belt respectively bypass the two transmission rollers and then are respectively sleeved on the transmission wheels on the two rotating shafts. The belt is located in the grooves on the transmission rollers. A soil discharge groove is formed at the other end of the main body box. A fixing frame is placed on the end face of the other end of the main body box; A spraying assembly is installed on the main body box. The spraying assembly includes a water storage tank. The water storage tank is installed on the end face of the main body box close to the soil discharge groove. A water pump is installed inside the water storage tank. A drain pipe is installed at the bottom of the side wall of the water storage tank. A water valve is installed on the drain pipe. One end of the drain pipe away from the water storage tank is installed with a spray arm, and a plurality of spray heads are installed on the spray arm.

2. The remediation device for heavy metal contaminated soil according to claim 1, characterized in that The transmission between the transmission cylinder and the transmission shaft is carried out through a planetary gear set, which can make the rotation speed of the sieve cylinder greater than that of the scraping plates. Furthermore, the discharge efficiency of the repair agent from the sieve holes of the sieve cylinder is high, and the rotation speed of the scraping plates is low, which can better mix the repair agent and the soil.

3. The remediation device for heavy metal contaminated soil according to claim 1, characterized in that The stirring plates are L-shaped plates, and a plurality of stirring protrusions are arranged on the surface.

4. The remediation device for heavy metal contaminated soil according to claim 1, wherein The thickness of the bucket gradually decreases from one end to the other end, making the front end of the bucket relatively sharp, thus facilitating the shoveling of soil.

5. The remediation device for heavy metal contaminated soil according to claim 1, characterized in that The soil-breaking paddles are spiral plates, and forked grooves are formed on the soil-breaking paddles, and one end of the forked grooves extends to one end of the soil-breaking paddles.

6. The remediation device for heavy metal contaminated soil according to claim 1 or 5, characterized in that Teeth are arranged on the soil-breaking paddles, and the teeth are triangular teeth.

7. The remediation device for heavy metal contaminated soil according to claim 1, characterized in that A plurality of sieve holes are formed on the wall of the sieve cylinder, and the diameter of the sieve holes gradually decreases from the outside to the inside.

8. The remediation device for heavy metal contaminated soil according to claim 7, characterized in that The diameter of the sieve cylinder is larger than that of the transmission cylinder and is twice the diameter of the transmission cylinder.

9. The remediation device for heavy metal contaminated soil according to claim 1, characterized in that A gap is arranged between the outer side of the support ring and the inner wall of the main body box, which can prevent the support ring from rubbing against the inner wall of the main body box during rotation and causing obstruction.

10. The method for using a remediation device for heavy metal contaminated soil according to claim 1, characterized in that Including the following steps: 1) First, install and fix the repair device for heavy metal contaminated soil on the vehicle through a fixing frame. The bucket is located in the forward direction of the vehicle, and put the repair agent into the sieve barrel. 2) The repair device for heavy metal contaminated soil moves along the road surface following the vehicle. The bucket shovels the soil into the bucket. At the same time, the drive motor works, driving the drive shaft and the drive wheel to rotate. The drive wheel drives the soil crushing roller to rotate through a belt, and the soil crushing roller drives a plurality of soil crushing paddles to rotate, crushing the soil in the bucket. 3) The crushed soil gradually moves into the main box. The transmission cylinder and the drive shaft are driven by a planetary gear set, and then the drive shaft drives the transmission cylinder to rotate. The drive shaft drives the sieve barrel to rotate, and the sieve barrel and the plurality of stirring plates inside rotate relative to each other, thereby stirring and mixing the repair agent in the sieve barrel. 4) The repair agent is extruded from the sieve holes on the wall of the sieve barrel and mixed with the soil in the main box. At the same time, the transmission cylinder drives a plurality of scraping plates to rotate, stirring and mixing the soil and the repair agent, thereby repairing the soil. 5) When the soil moves to the other end of the main box, it is discharged from the soil discharge groove at the other end of the main box and returns to the ground.

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