A soil pretreatment device and pretreatment method for contaminated soil remediation

Abstract

The present invention discloses a soil pretreatment device and a pretreatment method for contaminated soil remediation, belonging to the technical field of contaminated soil remediation. The soil pretreatment device for contaminated soil remediation includes a repair tank, a driving and walking component is installed on the repair tank, a support box component is arranged inside the driving and walking component, and an automatic steering component is arranged between the support box component and the driving and walking component; the support box component includes a support frame, a partition frame is fixedly installed inside the support frame, and the partition frame divides the inside of the support box component into a first installation chamber and a second installation chamber. By designing a synchronous mixing component, the present invention effectively controls the number of harmful microorganisms in the soil, and by designing a driving and walking component and an automatic steering component, the degree of automation is relatively high throughout the process, realizing continuous operation, thereby improving the mixing efficiency of the agent and the soil in the contaminated soil remediation.

Description

Technical Field

[0001] The present invention belongs to the technical field of contaminated soil remediation, and particularly relates to a soil pretreatment device and a pretreatment method for contaminated soil remediation. Background Art

[0002] Wastewater containing pollutants such as heavy metals, organic substances, acids and alkalis generated during industrial production, if directly discharged into the environment without effective treatment, will enter the soil through surface runoff or infiltration, etc., causing soil pollution. The commonly used method for pretreatment of existing contaminated soil remediation is the spraying method of bactericidal agents. Common disinfectants such as sodium hypochlorite and hydrogen peroxide have strong oxidizing properties and can destroy the cell structure and bioactive substances of bacteria, thereby achieving the purpose of sterilization. In order to make the agent mix more evenly with the contaminated soil, a mixing device is generally used to assist in mixing. The commonly used mixing method is to use a stirring head with specially designed blades, which is driven by a motor to rotate at a high speed. The stirring head penetrates into the contaminated soil, and the centrifugal force and shear force generated by the rotation of the blades are used to fully mix the bactericidal agent with the soil. This method has a large stirring force and can quickly break soil clumps, increasing the contact area between the agent and the soil, and is suitable for the treatment of large-scale contaminated soil.

[0003] However, the existing stirring heads often act on the soil with relatively large shear force and impact force. Although a certain stirring effect can be achieved, the aggregate structure of the soil will be overly damaged, making the soil too fine and affecting the porosity and air permeability of the soil, which is not conducive to the survival of microorganisms in the soil and the growth of plant roots. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a soil pretreatment device and a pretreatment method for contaminated soil remediation.

[0005] The technical solution adopted to solve the above technical problem is: A soil pretreatment device for contaminated soil remediation, including a repair tank, a repair platform is fixedly installed at the upper end of the repair tank, a limiting frame is symmetrically and fixedly installed in the repair tank, a discharge door is arranged on one side of the repair tank, and the discharge door is connected to the repair tank through a plurality of fixing bolts; a driving and walking component is installed on the repair tank, a support box component is arranged inside the driving and walking component, and an automatic steering component is arranged between the support box component and the driving and walking component; the support box component includes a support frame, a partition frame is fixedly installed inside the support frame, and the partition frame divides the inside of the support box component into a first installation chamber and a second installation chamber. A medicament spraying component is installed in the first installation chamber, and a synchronous mixing component is installed in the second installation chamber.

[0006] Through the above technical solution, the use of the synchronous mixing component does not forcibly cut into the soil in a high-speed rotation manner like an ordinary stirring head. This relatively gentle stirring method can, to a certain extent, maintain the original structure of the soil, reduce the damage to soil aggregates, be conducive to maintaining the porosity and air permeability of the soil, and protect the beneficial microbial community and soil ecological environment in the soil.

[0007] Furthermore, the driving and walking component includes a walking support frame slidably connected to the repair tank. Electric walking wheels are respectively installed on both sides of the walking support frame, and a mounting plate is fixedly installed inside the walking support frame.

[0008] Through the above technical solution, the driving and walking component can drive the devices in the support box component to repeatedly perform repair pretreatment operations on the contaminated soil, realizing the continuous operation of the device.

[0009] Furthermore, the automatic steering component includes a rotating shaft rotatably connected to the mounting plate. A mounting gear is fixedly installed on the rotating shaft. An incomplete gear is arranged on one side of the mounting gear. A mounting disk is fixedly installed on the incomplete gear. A steering rod is fixedly connected to one side of the mounting disk. A connecting convex frame is fixedly connected to the end of the mounting disk away from the steering rod. A mounting shaft is fixedly installed inside the connecting convex frame. A connecting rod is rotatably connected to the mounting shaft. A limiting block is rotatably connected to the mounting plate. A sliding groove is opened in the limiting block. The connecting rod is slidably connected in the sliding groove. Positioning columns are symmetrically arranged on one side of the repair table. The positioning columns are fixedly installed between the repair table.

[0010] Through the above technical solution, when the steering rod moves to the positioning column on one side of the repair table, due to the limitation of the positioning column, the steering rod rotates, thereby driving the mounting disk to rotate. The mounting disk transmits power to the incomplete gear. The incomplete gear drives the mounting gear to rotate through meshing transmission, and further enables the mounting gear to drive the support box component fixedly installed with the rotating shaft to rotate.

[0011] Furthermore, the mounting gear and the incomplete gear are in meshing transmission. The mounting disk is rotatably connected to the mounting plate. One end of the rotating shaft is fixedly connected to the support box component.

[0012] Through the above technical solution, the operations of the atomizing nozzle spraying the medicament in the front and the mixing plate stirring the soil in the rear can be continuously and repeatedly realized. It does not require manual adjustment by the staff, and the degree of automation is relatively high throughout the process, realizing continuous operation. Thereby, the efficiency of mixing the medicament and the soil in the contaminated soil repair is improved, and the repair process is accelerated.

[0013] Further, the chemical spraying assembly includes a chemical tank fixedly installed on the support tank assembly. A chemical inlet pipe is fixedly installed on the chemical tank. A water pump is fixedly connected to one side of the chemical tank. One end of the water pump away from the chemical tank is fixedly connected to a chemical delivery pipe. One end of the chemical delivery pipe is fixedly connected to the circulation pipe. The chemical delivery pipe and the circulation pipe are interconnected. A plurality of chemical distribution pipes are evenly arranged on the circulation pipe. The plurality of chemical distribution pipes are fixedly installed on the support frame. One end of the chemical distribution pipe away from the circulation pipe is fixedly connected to an atomizing nozzle. An installation baffle is fixedly installed on one side of the lower end of the support frame. The chemical tank is filled with a sterilizing chemical.

[0014] Through the above technical solution, the water pump pumps the sterilizing chemical out of the chemical tank, pumps it into the circulation pipe through the chemical delivery pipe, and then evenly sprays it out through the atomizing nozzles in the plurality of chemical distribution pipes.

[0015] Further, the synchronous mixing assembly includes a central fixed shaft rotatably connected to the support frame. A mixing plate is fixedly installed on the central fixed shaft. A synchronous rod is fixedly connected to the upper end of the central fixed shaft. A positioning groove is fixedly connected in the second installation chamber.

[0016] Through the above technical solution, the plurality of mixing plates are arranged in a row and swing synchronously, which can cover a larger soil mixing area, avoid the mixing dead corners caused by the limited mixing range of ordinary mixing heads, and at the same time, the mixing method of the synchronous swinging of the mixing plates is relatively gentle.

[0017] Further, a moving rod is arranged at one end of the synchronous rod away from the central fixed shaft. The moving rod is rotatably connected to the synchronous rod. A driving frame is fixedly installed on one side of the moving rod. A limiting rack is slidably connected in the positioning groove. A positioning rod is fixedly installed at one end of the limiting rack. The connecting rod is arranged in the positioning rod and is slidably connected to the positioning rod. The connecting rod is fixedly installed on one side of the driving frame. A driving gear is arranged at the upper end of the limiting rack. The driving gear is meshed with the limiting rack for transmission. The driving gear is fixedly connected to the output end of the servo motor. The servo motor is fixedly connected to the lower end of a fixed platform. A limiting bottom plate is fixedly installed at one end of the connecting rod.

[0018] Through the above technical solution, the output end of the servo motor drives the driving gear to rotate. The driving gear drives the limiting rack to move through meshing, so that the limiting rack drives the positioning rod to move. The positioning rod drives the connecting rod to move. The connecting rod drives the moving rod to move through the driving frame. The moving rod transmits the power to the synchronous rod, so that the synchronous rod drives the central fixed shaft to rotate. Further, the central fixed shaft drives the mixing plates to rotate back and forth, so that the plurality of mixing plates swing simultaneously, and then the soil is stirred, making the contaminated soil and the sterilizing chemical mix more evenly.

[0019] The using method of the soil pretreatment device for contaminated soil remediation includes the following specific steps:

[0020] Step 1: Start the water pump. The water pump pumps out the sterilizing agent from the agent tank, pumps it into the circulation pipe through the medicine delivery pipe, and then evenly sprays it out through the atomizing nozzles in multiple medicine distribution pipes. Start the power supply of the servo motor. The output end of the servo motor drives the driving gear to rotate. The driving gear drives the limit rack to move through meshing, so that the limit rack drives the positioning rod to move. The positioning rod drives the connecting rod to move. The connecting rod drives the moving rod to move through the driving frame. The moving rod transmits the power to the synchronizing rod, so that the synchronizing rod drives the central fixed shaft to rotate. Further, the central fixed shaft drives the mixing plate to rotate back and forth, causing multiple mixing plates to swing simultaneously, thereby stirring the soil, making the contaminated soil and the sterilizing agent mix more evenly, and the sterilizing agent fully contacts various microorganisms in the soil, including pathogenic bacteria and fungi, so as to more comprehensively inhibit or kill them and effectively control the number of harmful microorganisms in the soil;

[0021] Step 2: Start the power supply on the driving and walking assembly, so that the electric walking wheels on both sides of the walking support frame start to drive the driving and walking assembly and the support box assembly inside the driving and walking assembly to move synchronously along the direction of the repair groove. The atomizing nozzles spray in the front, and multiple mixing plates are behind the atomizing nozzles to stir the sprayed soil;

[0022] Step 3: When the steering rod moves to the positioning column on one side of the repair table, due to the limitation of the positioning column, the steering rod rotates, thereby driving the mounting plate to rotate. The mounting plate transmits the power to the incomplete gear. The incomplete gear drives the mounting gear to rotate through meshing transmission. Further, the mounting gear drives the support box assembly fixedly installed with the rotating shaft to rotate. Further, the support box assembly flips, and the positions of the atomizing nozzles and the mixing plates flip. At this time, the driving and walking assembly moves back, and the operation of spraying the agent in the front by the atomizing nozzles and stirring the soil by the mixing plates behind is repeated.

[0023] The beneficial effects of the present invention are as follows: (1) By designing a synchronous mixing component and driven by a servo motor, the power is transmitted to multiple mixing plates through a linkage mechanism, and the multiple mixing plates swing synchronously, thereby stirring the soil, making the contaminated soil and the bactericidal agent mix more evenly. The bactericidal agent fully contacts various microorganisms in the soil, including pathogenic bacteria and fungi, so as to more comprehensively inhibit or kill them, effectively controlling the number of harmful microorganisms in the soil. And through the synchronous mixing component, the multiple mixing plates are arranged in a whole row and swing synchronously, which can cover a larger soil stirring area, avoiding the mixing dead corners caused by the limited mixing range of ordinary mixing heads. At the same time, the stirring method of the synchronous swinging of the mixing plates is relatively gentle. It is to turn the soil by the swinging of multiple mixing plates, unlike ordinary mixing heads that forcibly cut into the soil in a high-speed rotation manner. This relatively gentle stirring method can maintain the original structure of the soil to a certain extent, reduce the damage to soil aggregates, and is beneficial to maintaining the porosity and air permeability of the soil, protecting the beneficial microbial community and soil ecological environment in the soil; (2) By designing a driving walking component and an automatic steering component, the driving walking component can drive the device in the support box component to repeatedly perform pre-treatment operations on the contaminated soil. At the same time, the setting of the automatic steering component enables the device to flip the support box component when moving to one side of the repair tank, and the positions of the atomizing nozzle and the mixing plate are flipped. At this time, the driving walking component moves back, continuously and repeatedly realizing the operation of spraying the agent in front by the atomizing nozzle and stirring the soil at the back by the mixing plate, without the need for manual adjustment by the staff, with a high degree of automation throughout the process, realizing continuous operation, thereby improving the efficiency of mixing the agent and the soil in the contaminated soil repair and accelerating the repair process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional structure diagram of the present invention;

[0025] Figure 2 is a three-dimensional structure diagram of the driving walking component of the present invention;

[0026] Figure 3 is a first perspective structure diagram of the support box component of the present invention;

[0027] Figure 4 is a first perspective structure diagram of the automatic steering component of the present invention;

[0028] Figure 5 is a second perspective structure diagram of the automatic steering component of the present invention;

[0029] Figure 6 is a second perspective structure diagram of the support box component of the present invention;

[0030] Figure 7 is an internal structure diagram of the support frame of the present invention;

[0031] Figure 8 is the three-dimensional structure diagram of the synchronous hybrid component of the present invention;

[0032] Figure 9 is the present invention Figure 8 magnified view of the structure at location A

[0033] Reference numerals: 1, repair groove; 11, repair table; 12, discharge door; 13, limit frame; 2, driving and walking component; 21, walking support frame; 22, electric walking wheel; 23, mounting plate; 3, support box component; 30, support frame; 31, partition frame; 32, first installation chamber; 33, second installation chamber; 4, automatic steering component; 40, limit block; 41, chute; 42, connecting rod; 43, mounting shaft; 44, connecting convex frame; 45, mounting disc; 46, incomplete gear; 47, steering rod; 48, positioning column; 49, mounting gear; 410, rotating shaft; 5, synchronous hybrid component; 50, central fixed shaft; 51, mixing plate; 52, synchronous rod; 53, moving rod; 54, driving frame; 55, connecting rod; 56, limit bottom plate; 57, positioning rod; 58, limit rack; 59, positioning groove; 510, fixed table; 511, servo motor; 512, driving gear; 6, medicament spraying component; 60, mounting baffle; 61, medicament box; 62, medicine inlet pipe; 63, water pump; 64, medicine delivery pipe; 65, circulation pipe; 66, medicine dividing pipe; 67, atomizing nozzle. Detailed implementation manners

[0034] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] As Figures 1 - 6As shown in the figure, a soil pretreatment device for contaminated soil remediation in this embodiment includes a remediation tank 1. A remediation platform 11 is fixedly installed at the upper end of the remediation tank 1. Limiting frames 13 are symmetrically and fixedly installed in the remediation tank 1. A discharge door 12 is arranged on one side of the remediation tank 1, and the discharge door 12 is connected to the remediation tank 1 through a plurality of fixing bolts. A driving and walking component 2 is installed on the remediation tank 1. A support box component 3 is arranged inside the driving and walking component 2, and an automatic steering component 4 is arranged between the support box component 3 and the driving and walking component 2. The support box component 3 includes a support frame 30. A partition frame 31 is fixedly installed inside the support frame 30. The partition frame 31 divides the inside of the support box component 3 into a first installation chamber 32 and a second installation chamber 33. A chemical spraying component 6 is installed in the first installation chamber 32, and a synchronous mixing component 5 is installed in the second installation chamber 33. The use of the synchronous mixing component 5 does not forcibly cut into the soil in the way of high-speed rotation like an ordinary mixing head. This relatively gentle mixing method can, to a certain extent, maintain the original structure of the soil, reduce the damage to soil aggregates, is beneficial to maintaining the porosity and air permeability of the soil, and protects the beneficial microbial community and soil ecological environment in the soil.

[0036] As Figures 1 - 2 shown, the driving and walking component 2 includes a walking support frame 21 slidably connected to the remediation tank 1. Electric walking wheels 22 are respectively installed on both sides of the walking support frame 21. An installation plate 23 is fixedly installed inside the walking support frame 21. The driving and walking component 2 can drive the devices inside the support box component 3 to repeatedly perform remediation pretreatment operations on the contaminated soil, realizing the continuous operation of the device.

[0037] As Figures 1 - 5As shown in the figure, the automatic steering assembly 4 includes a rotating shaft 410 rotatably connected to the mounting plate 23. An installation gear 49 is fixedly installed on the rotating shaft 410. An incomplete gear 46 is arranged on one side of the installation gear 49. An installation disk 45 is fixedly installed on the incomplete gear 46. A steering rod 47 is fixedly connected to one side of the installation disk 45. A connecting convex frame 44 is fixedly connected to the end of the installation disk 45 away from the steering rod 47. An installation shaft 43 is fixedly installed inside the connecting convex frame 44. A connecting rod 42 is rotatably connected to the installation shaft 43. A limiting block 40 is rotatably connected to the mounting plate 23. A chute 41 is opened inside the limiting block 40. The connecting rod 42 is slidably connected inside the chute 41. Positioning columns 48 are symmetrically arranged on one side of the repair table 11. The positioning columns 48 are fixedly installed between the repair table 11. When the steering rod 47 moves to the positioning column 48 on one side of the repair table 11, due to the limitation of the positioning column 48, the steering rod 47 rotates, thereby driving the installation disk 45 to rotate. The installation disk 45 transmits the power to the incomplete gear 46. The incomplete gear 46 drives the installation gear 49 to rotate through meshing transmission. Furthermore, the installation gear 49 drives the support box assembly 3 fixedly installed with the rotating shaft 410 to rotate; the installation gear 49 and the incomplete gear 46 are in meshing transmission. The installation disk 45 is rotatably connected to the mounting plate 23. One end of the rotating shaft 410 is fixedly connected to the support box assembly 3. It can continuously and repeatedly realize the operation of spraying the medicament in front by the atomizing nozzle 67 and stirring the soil by the mixing plate 51 at the rear. It does not require manual adjustment by the staff, and the degree of automation is relatively high, realizing continuous operation. Thus, the efficiency of mixing the medicament and the soil in the contaminated soil remediation is improved, and the remediation process is accelerated.

[0038] As Figures 1 - 7 shown in the figure, the medicament spraying assembly 6 includes a medicament tank 61 fixedly installed with the support box assembly 3. A medicine inlet pipe 62 is fixedly installed on the medicament tank 61. A water pump 63 is fixedly connected to one side of the medicament tank 61. A medicine delivery pipe 64 is fixedly connected to the end of the water pump 63 away from the medicament tank 61. One end of the medicine delivery pipe 64 is fixedly connected to a circulation pipe 65. The medicine delivery pipe 64 and the circulation pipe 65 are interconnected. A plurality of medicine distribution pipes 66 are evenly arranged on the circulation pipe 65. The plurality of medicine distribution pipes 66 are fixedly installed with the support frame 30. The end of the medicine distribution pipe 66 away from the circulation pipe 65 is fixedly connected to an atomizing nozzle 67. An installation baffle 60 is fixedly installed on one side of the lower end of the support frame 30. The medicament tank 61 is filled with a bactericidal medicament. The water pump 63 pumps the bactericidal medicament out of the medicament tank 61 and pumps it into the circulation pipe 65 through the medicine delivery pipe 64, and then evenly sprays it out through the atomizing nozzles 67 in the plurality of medicine distribution pipes 66.

[0039] As Figures 1 - 9As shown in the figure, the synchronous mixing component 5 includes a central fixed shaft 50 rotatably connected to the support frame 30. A mixing plate 51 is fixedly installed on the central fixed shaft 50. The upper end of the central fixed shaft 50 is fixedly connected to a synchronous rod 52. A positioning groove 59 is fixedly connected inside the second installation chamber 33. Multiple mixing plates 51 are arranged in a row and swing synchronously, which can cover a larger soil mixing area, avoiding the mixing dead angle caused by the limited mixing range of ordinary mixing heads. At the same time, the mixing method of the synchronous swing of the mixing plates 51 is relatively gentle. One end of the synchronous rod 52 away from the central fixed shaft 50 is provided with a moving rod 53. The moving rod 53 is rotatably connected to the synchronous rod 52. A driving frame 54 is fixedly installed on one side of the moving rod 53. A limiting rack 58 is slidably connected in the positioning groove 59. One end of the limiting rack 58 is fixedly installed with a positioning rod 57. A connecting rod 55 is arranged inside the positioning rod 57 and is slidably connected to the positioning rod 57. The connecting rod 55 is fixedly installed on one side of the driving frame 54. A driving gear 512 is arranged at the upper end of the limiting rack 58. The driving gear 512 is in meshing transmission with the limiting rack 58. The driving gear 512 is fixedly connected to the output end of the servo motor 511. The lower end of the servo motor 511 is fixedly connected to a fixed platform 510. One end of the connecting rod 55 is fixedly installed with a limiting bottom plate 56. The output end of the servo motor 511 drives the driving gear 512 to rotate. The driving gear 512 drives the limiting rack 58 to move through meshing, so that the limiting rack 58 drives the positioning rod 57 to move. The positioning rod 57 drives the connecting rod 55 to move. The connecting rod 55 drives the moving rod 53 to move through the driving frame 54. The moving rod 53 transmits the power to the synchronous rod 52, so that the synchronous rod 52 drives the central fixed shaft 50 to rotate. Further, the central fixed shaft 50 drives the mixing plates 51 to rotate back and forth, so that multiple mixing plates 51 swing simultaneously, and then the soil is stirred, making the contaminated soil and the bactericidal agent mix more evenly.

[0040] The usage method of the soil pretreatment device for contaminated soil remediation includes the following specific steps:

[0041] Step 1: Start the water pump 63. The water pump 63 pumps out the bactericidal agent from the agent tank 61, pumps it into the circulation pipe 65 through the medicine delivery pipe 64, and then evenly sprays it out through the atomizing nozzles 67 in the multiple medicine distribution pipes 66. Start the power supply of the servo motor 511. The output end of the servo motor 511 drives the driving gear 512 to rotate. The driving gear 512 drives the limit rack 58 to move through meshing, so that the limit rack 58 drives the positioning rod 57 to move. The positioning rod 57 drives the connecting rod 55 to move. The connecting rod 55 drives the moving rod 53 to move through the driving frame 54. The moving rod 53 transmits the power to the synchronizing rod 52, so that the synchronizing rod 52 drives the central fixed shaft 50 to rotate. Further, the central fixed shaft 50 drives the mixing plate 51 to rotate back and forth, causing multiple mixing plates 51 to swing simultaneously, thereby stirring the soil, making the contaminated soil and the bactericidal agent mix more evenly, and the bactericidal agent fully contact various microorganisms in the soil, including pathogenic bacteria and fungi, so as to more comprehensively inhibit or kill them and effectively control the number of harmful microorganisms in the soil;

[0042] Step 2: Start the power supply on the driving and walking assembly 2, so that the electric walking wheels 22 on both sides of the walking support frame 21 start to drive the driving and walking assembly 2 and the support box assembly 3 inside the driving and walking assembly 2 to move synchronously along the direction of the repair groove 1. The atomizing nozzles 67 spray in the front, and multiple mixing plates 51 are behind the atomizing nozzles 67 to stir the sprayed soil;

[0043] Step 3: When the steering rod 47 moves to the positioning column 48 on one side of the repair table 11, due to the limitation of the positioning column 48, the steering rod 47 rotates, thereby driving the mounting plate 45 to rotate. The mounting plate 45 transmits the power to the incomplete gear 46. The incomplete gear 46 drives the mounting gear 49 to rotate through meshing transmission. Further, the mounting gear 49 drives the support box assembly 3 fixedly installed with the rotating shaft 410 to rotate. Further, the support box assembly 3 flips, and the positions of the atomizing nozzles 67 and the mixing plates 51 flip. At this time, the driving and walking assembly 2 moves back, and the operations of the atomizing nozzles 67 spraying the agent in the front and the mixing plates 51 stirring the soil in the back are repeated.

[0044] The above is only a preferred embodiment of the present invention and is not used to limit the protection scope of the present invention.

Claims

1. A soil pretreatment device for contaminated soil remediation, comprising a remediation tank (1). A remediation platform (11) is fixedly installed at the upper end of the remediation tank (1). Limiting frames (13) are symmetrically and fixedly installed in the remediation tank (1). A discharge door (12) is arranged on one side of the remediation tank (1), and the discharge door (12) is connected to the remediation tank (1) through a plurality of fixing bolts; A driving and walking component (2) is installed on the remediation tank (1). A support box component (3) is arranged inside the driving and walking component (2). An automatic steering component (4) is arranged between the support box component (3) and the driving and walking component (2); The support box component (3) includes a support frame (30). A partition frame (31) is fixedly installed inside the support frame (30). The partition frame (31) divides the inside of the support box component (3) into a first installation chamber (32) and a second installation chamber (33). A chemical spraying component (6) is installed in the first installation chamber (32), and a synchronous mixing component (5) is installed in the second installation chamber (33); The driving and walking component (2) includes a walking support frame (21) slidably connected to the remediation tank (1). Electric walking wheels (22) are respectively installed on both sides of the walking support frame (21). A mounting plate (23) is fixedly installed inside the walking support frame (21); The automatic steering component (4) includes a rotating shaft (410) rotatably connected to the mounting plate (23). A mounting gear (49) is fixedly installed on the rotating shaft (410). An incomplete gear (46) is arranged on one side of the mounting gear (49). A mounting disc (45) is fixedly installed on the incomplete gear (46). A steering rod (47) is fixedly connected to one side of the mounting disc (45). A connecting convex frame (44) is fixedly connected to the end of the mounting disc (45) away from the steering rod (47). A mounting shaft (43) is fixedly installed inside the connecting convex frame (44). A connecting rod (42) is rotatably connected to the mounting shaft (43). A limiting block (40) is rotatably connected to the mounting plate (23). A chute (41) is formed inside the limiting block (40). The connecting rod (42) is slidably connected to the chute (41). Positioning columns (48) are symmetrically arranged on one side of the remediation platform (11), and the positioning columns (48) are fixedly installed between the positioning columns (48) and the remediation platform (11). One end of the rotating shaft (410) is fixedly connected to the support box component (3); The synchronous mixing component (5) includes a central fixed shaft (50) rotatably connected to the support frame (30). A mixing plate (51) is fixedly installed on the central fixed shaft (50). A synchronous rod (52) is fixedly connected to the upper end of the central fixed shaft (50). A positioning groove (59) is fixedly connected inside the second installation chamber (33); 2. The soil pretreatment device for contaminated soil remediation according to claim 1, characterized in that, The mounting gear (49) and the incomplete gear (46) are meshed and driven, and the mounting disc (45) is rotatably connected to the mounting plate (23).

3. The soil pretreatment device for contaminated soil remediation according to claim 2, wherein, The medicament spraying assembly (6) includes a medicament tank (61) fixedly installed on the support tank assembly (3). A medicine inlet pipe (62) is fixedly installed on the medicament tank (61). A water pump (63) is fixedly connected to one side of the medicament tank (61). One end of the water pump (63) far from the medicament tank (61) is fixedly connected to a medicine delivery pipe (64). One end of the medicine delivery pipe (64) is fixedly connected to a circulation pipe (65). The medicine delivery pipe (64) and the circulation pipe (65) are interconnected. A plurality of medicine distribution pipes (66) are evenly arranged on the circulation pipe (65). The plurality of medicine distribution pipes (66) are fixedly installed on the support frame (30). One end of the medicine distribution pipe (66) far from the circulation pipe (65) is fixedly connected to an atomizing nozzle (67). An installation baffle (60) is fixedly installed on one side of the lower end of the support frame (30). The medicament tank (61) is filled with a bactericidal medicament.

4. The soil pretreatment device for contaminated soil remediation according to claim 3, wherein, One end of the synchronous rod (52) far from the central fixed shaft (50) is provided with a moving rod (53). The moving rod (53) is rotatably connected to the synchronous rod (52). A driving frame (54) is fixedly installed on one side of the moving rod (53). A limit rack (58) is slidably connected in the positioning groove (59). A positioning rod (57) is fixedly installed at one end of the limit rack (58). A connecting rod (55) is arranged in the positioning rod (57) and is slidably connected to the positioning rod (57). The connecting rod (55) is fixedly installed on one side of the driving frame (54). A driving gear (512) is arranged at the upper end of the limit rack (58). The driving gear (512) is meshed with the limit rack (58) for transmission. The driving gear (512) is fixedly connected to the output end of the servo motor (511). The servo motor (511) is fixedly connected to a fixed platform (510) at the lower end. A limit bottom plate (56) is fixedly installed at one end of the connecting rod (55).

5. The method for using the soil pretreatment device for contaminated soil remediation according to claim 4, characterized in that, It includes the following specific steps: Step 1: Start the water pump (63). The water pump (63) pumps out the sterilizing agent from the agent tank (61), pumps it into the circulation pipe (65) through the medicine delivery pipe (64), and then evenly sprays it out through the atomizing nozzles (67) in the multiple medicine distribution pipes (66). Start the power supply of the servo motor (511). The output end of the servo motor (511) drives the driving gear (512) to rotate. The driving gear (512) drives the limit rack (58) to move through meshing, so that the limit rack (58) drives the positioning rod (57) to move. The positioning rod (57) drives the connecting rod (55) to move. The connecting rod (55) drives the moving rod (53) to move through the driving frame (54). The moving rod (53) transmits the power to the synchronizing rod (52), so that the synchronizing rod (52) drives the central fixed shaft (50) to rotate. Furthermore, the central fixed shaft (50) drives the mixing plate (51) to rotate back and forth, causing multiple mixing plates (51) to swing simultaneously, thereby stirring the soil, making the contaminated soil and the sterilizing agent mix more evenly, and enabling the sterilizing agent to fully contact various microorganisms in the soil, including pathogenic bacteria and fungi, so as to more comprehensively inhibit or kill them and effectively control the number of harmful microorganisms in the soil; Step 2: Start the power supply of the driving and walking assembly (2), so that the electric walking wheels (22) on both sides of the walking support frame (21) start to drive the driving and walking assembly (2) and the support box assembly (3) inside the driving and walking assembly (2) to move synchronously along the direction of the repair groove (1). The atomizing nozzles (67) spray in the front, and multiple mixing plates (51) are behind the atomizing nozzles (67) to stir the sprayed soil; Step 3: When the steering rod (47) moves to the positioning column (48) on one side of the repair table (11), due to the limitation of the positioning column (48), the steering rod (47) rotates, thereby driving the mounting disc (45) to rotate. The mounting disc (45) transmits the power to the incomplete gear (46). The incomplete gear (46) drives the mounting gear (49) to rotate through meshing transmission. Furthermore, the mounting gear (49) drives the support box assembly (3) fixedly installed with the rotating shaft (410) to rotate. Further, the support box assembly (3) flips, and the positions of the atomizing nozzles (67) and the mixing plates (51) flip. At this time, the driving and walking assembly (2) moves back, and the operations of the atomizing nozzles (67) spraying the agent in the front and the mixing plates (51) stirring the soil in the back are repeated.

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