Soil pretreatment device and pretreatment method for contaminated soil remediation

Abstract

The invention discloses a soil pretreatment device for contaminated soil remediation and a pretreatment method, and belongs to the technical field of contaminated soil remediation. The soil pretreatment device for contaminated soil remediation comprises a remediation tank, a driving walking assembly is installed on the remediation tank, and a supporting box assembly is arranged in the driving walking assembly; an automatic steering assembly is arranged between the supporting box assembly and the driving walking assembly. The supporting box assembly comprises a supporting frame, a partition frame is fixedly installed in the supporting frame, and the interior of the supporting box assembly is divided into a first installation cavity and a second installation cavity through the partition frame. By designing the synchronous mixing assembly, the number of harmful microorganisms in soil is effectively controlled, by designing the driving walking assembly and the automatic steering assembly, the automation degree of the whole process is high, continuous operation is achieved, and therefore the efficiency of mixing of the contaminated soil remediation traditional Chinese medicine and the soil is improved.

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 biological active substances of bacteria, thereby achieving the purpose of sterilization. In order to make the agent and the contaminated soil mix more evenly, a mixing device is generally used for auxiliary 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 rotation of the blades generates centrifugal force and shear force to fully mix the bactericidal agent with the soil. This method has a large stirring force, can quickly break up soil aggregates, increase 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, it will overly damage the aggregate structure of the soil, make the soil too fine, affect the porosity and air permeability of the soil, and is not conducive to the survival of soil microorganisms 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 table is fixedly installed at the upper end of the repair tank, limiting frames are 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 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 conducive to maintaining the porosity and air permeability of the soil, and protects the beneficial microbial community and soil ecological environment in the soil.

[0007] Further, the driving and walking component includes a walking support frame slidably connected to the repair groove. 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 device in the support box component to repeatedly perform pre-treatment operations on the contaminated soil, realizing the continuous operation of the device.

[0009] Further, 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, and 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] Further, 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 operation 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 improving the efficiency of mixing the medicament and the soil in the remediation of contaminated soil and accelerating the remediation process.

[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 bactericidal chemical.

[0014] Through the above technical solution, the water pump pumps the bactericidal 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 stirring area, avoid the stirring dead angle caused by the limited stirring range of ordinary stirring heads, and at the same time, the stirring 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 the 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 bactericidal chemical mix more evenly.

[0019] The usage method of the soil pretreatment device for contaminated soil remediation includes the following specific steps: Step 1: Start the water pump. The water pump pumps out the bactericidal 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 bactericidal agent mix more evenly, and the bactericidal agent fully contacting 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 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; 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 operations of spraying the agent in the front by the atomizing nozzles and stirring the soil by the mixing plates in the back are repeated.

[0020] 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. Moreover, through the synchronous mixing component, the multiple mixing plates are arranged in a row and swing synchronously, which can cover a larger soil stirring area, avoiding the stirring dead angle caused by the limited stirring range of ordinary stirring heads. At the same time, the stirring method of the synchronous swinging of the mixing plates is relatively gentle. It flips the soil by the swinging of multiple mixing plates, unlike ordinary stirring 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, and continuously repeats the operation of spraying the agent in front by the atomizing nozzle and stirring the soil behind by the mixing plate, without 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 remediation of contaminated soil and accelerating the remediation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional structure diagram of the present invention; Figure 2 is a three-dimensional structure diagram of the driving walking component of the present invention; Figure 3 is a first perspective structure diagram of the support box component of the present invention; Figure 4 is a first perspective structure diagram of the automatic steering component of the present invention; Figure 5 is a second perspective structure diagram of the automatic steering component of the present invention; Figure 6 is a second perspective structure diagram of the support box component of the present invention; Figure 7 is an internal structure diagram of the support frame of the present invention; Figure 8 is a three-dimensional structure diagram of the synchronous mixing component of the present invention; Figure 9 is the present invention Figure 8 Enlarged structure diagram of part A Reference numerals: 1, repair groove; 11, repair table; 12, discharge door; 13, limit frame; 2, drive walking assembly; 21, walking support frame; 22, electric walking wheel; 23, mounting plate; 3, support box assembly; 30, support frame; 31, partition frame; 32, first installation chamber; 33, second installation chamber; 4, automatic steering assembly; 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 mixing assembly; 50, central fixed shaft; 51, mixing plate; 52, synchronous rod; 53, moving rod; 54, drive frame; 55, connecting rod; 56, limit bottom plate; 57, positioning rod; 58, limit rack; 59, positioning groove; 510, fixed table; 511, servo motor; 512, drive gear; 6, chemical agent spraying assembly; 60, mounting baffle; 61, chemical agent tank; 62, medicine inlet pipe; 63, water pump; 64, medicine delivery pipe; 65, circulation pipe; 66, medicine distribution pipe; 67, atomizing nozzle. Detailed implementation manners

[0022] 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.

[0023] As Figures 1 - 6 shown, a soil pretreatment device for contaminated soil remediation in this embodiment includes a repair groove 1. A repair table 11 is fixedly installed at the upper end of the repair groove 1. Limit frames 13 are symmetrically and fixedly installed in the repair groove 1. A discharge door 12 is arranged on one side of the repair groove 1. The discharge door 12 and the repair groove 1 are connected by a plurality of fixing bolts; a drive walking assembly 2 is installed on the repair groove 1. A support box assembly 3 is arranged inside the drive walking assembly 2. An automatic steering assembly 4 is arranged between the support box assembly 3 and the drive walking assembly 2; the support box assembly 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 assembly 3 into a first installation chamber 32 and a second installation chamber 33. A chemical agent spraying assembly 6 is installed in the first installation chamber 32. A synchronous mixing assembly 5 is installed in the second installation chamber 33. The use of the synchronous mixing assembly 5 does not cut into the soil forcefully in a high-speed rotation manner 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.

[0024] As Figures 1 - 2As shown in the figure, the driving and walking assembly 2 includes a walking support frame 21 that is slidably connected to the repair groove 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 assembly 2 can drive the device inside the support box assembly 3 to repeatedly perform repair pretreatment operations on contaminated soil, realizing the continuous operation of the device.

[0025] As Figures 1 - 5 shown in the figure, the automatic steering assembly 4 includes a rotating shaft 410 that is rotatably connected to the installation 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 installation plate 23. A sliding groove 41 is opened inside the limiting block 40. The connecting rod 42 is slidably connected inside the sliding groove 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 upper part 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 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 installation 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 the front by the atomizing nozzle 67 and stirring the soil by the mixing plate 51 at the back. It does not require manual adjustment by the staff. The whole process has a high degree of automation and realizes continuous operation, thereby improving the efficiency of mixing the medicament and the soil in the repair of contaminated soil and accelerating the repair process.

[0026] As Figures 1 - 7As shown in the figure, 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 away 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 between the support frames 30. One 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 agent. The water pump 63 pumps the bactericidal agent out of the medicament 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 plurality of medicine distribution pipes 66.

[0027] As Figures 1 - 9 shown in the figure, the synchronous mixing assembly 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 in the second installation chamber 33. The plurality of mixing plates 51 are arranged in a row and swing synchronously, which can cover a larger soil stirring area, avoiding the stirring dead angle caused by the limited stirring range of ordinary stirring heads. At the same time, the stirring method of the synchronous swinging 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. A positioning rod 57 is fixedly installed at one end of the limiting 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 limiting rack 58. The driving gear 512 is meshed with the limiting 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 the lower end of a fixed table 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. Furthermore, the central fixed shaft 50 drives the mixing plates 51 to rotate back and forth, so that the plurality of mixing plates 51 swing simultaneously, thereby stirring the soil and making the contaminated soil and the bactericidal agent mix more evenly.

[0028] The usage method of the soil pretreatment device for contaminated soil remediation includes the following specific steps: 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 plurality of 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 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 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 the plurality of 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 contacting 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 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 the plurality of 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 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 operation of spraying the medicine by the atomizing nozzles 67 in the front and stirring the soil by the mixing plates 51 in the back is repeated.

[0029] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A soil pretreatment device for contaminated soil remediation, comprising a remediation tank (1), characterized in that: A repair platform (11) is fixedly mounted on the upper end of the repair groove (1), a limiting frame (13) is symmetrically fixedly mounted inside the repair groove (1), a discharge door (12) is arranged on one side of the repair groove (1), and the discharge door (12) is connected to the repair groove (1) via a plurality of fixing bolts; A driving travel component (2) is installed on the repair groove (1), a support box component (3) is arranged inside the driving travel component (2), and an automatic steering component (4) is arranged between the support box component (3) and the driving travel component (2); The support box assembly (3) comprises a support frame (30), a partition frame (31) being fixedly mounted inside the support frame (30), the partition frame (31) dividing the support box assembly (3) into a first installation chamber (32) and a second installation chamber (33), a medicine spraying assembly (6) being mounted inside the first installation chamber (32), and a synchronous mixing assembly (5) being mounted inside the second installation chamber (33).

2. The soil pretreatment device for contaminated soil remediation according to claim 1, characterized in that: The driving walking assembly (2) comprises a walking support frame (21) slidably connected to the repair groove (1), electric walking wheels (22) are respectively installed on both sides of the walking support frame (21), and a mounting plate (23) is fixedly installed inside the walking support frame (21).

3. The soil pretreatment device for contaminated soil remediation according to claim 2, characterized in that: The automatic steering assembly (4) comprises a rotating shaft (410) rotatably connected to the mounting plate (23); a mounting gear (49) is fixedly mounted on the rotating shaft (410); an incomplete gear (46) is arranged on one side of the mounting gear (49); a mounting plate (45) is fixedly mounted on the incomplete gear (46); a steering rod (47) is fixedly connected to one side of the mounting plate (45); a connecting cam (44) is fixedly connected to one end of the mounting plate (45) away from the steering rod (47); a mounting shaft (43) is fixedly mounted in the connecting cam (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 sliding groove (41) is arranged in the limiting block (40); a connecting rod (42) is slidably connected in the sliding groove (41); and a positioning column (48) is symmetrically arranged on one side of the repair platform (11); the positioning column (48) is fixedly mounted between the repair platform (11).

4. The soil pretreatment device for contaminated soil remediation according to claim 3, characterized in that: The mounting gear (49) is meshed with the incomplete gear (46) for transmission, the mounting disc (45) is rotationally connected to the mounting plate (23), and one end of the rotating shaft (410) is fixedly connected to the support box assembly (3).

5. The soil pretreatment device for contaminated soil remediation according to claim 1, characterized in that: The medicine spraying assembly (6) comprises a medicine box (61) fixedly mounted on the support box assembly (3); a medicine inlet pipe (62) is fixedly mounted on the medicine box (61); a water pump (63) is fixedly connected to one side of the medicine box (61); a medicine delivery pipe (64) is fixedly connected to one end of the water pump (63) away from the medicine box (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 mounted on the support frame (30); an atomizing nozzle (67) is fixedly connected to one end of the medicine distribution pipe (66) away from the circulation pipe (65); a mounting baffle (60) is fixedly mounted on one side of the lower end of the support frame (30); and the medicine box (61) is filled with a sterilizing agent.

6. The soil pretreatment device for contaminated soil remediation according to claim 1, characterized in that: The synchronous mixing assembly (5) comprises a central fixed shaft (50) rotatably connected to the support frame (30), a mixing plate (51) is fixedly mounted on the central fixed shaft (50), a synchronous rod (52) is fixedly connected to the upper end of the central fixed shaft (50), and a positioning groove (59) is fixedly connected in the second mounting chamber (33).

7. The soil pretreatment device for contaminated soil remediation according to claim 6, characterized in that: A moving rod (53) is provided at one end of the synchronization rod (52) away from the central fixed shaft (50), and the moving rod (53) is rotationally connected to the synchronization 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), and a positioning rod (57) is fixedly installed on one end of the limit rack (58). A connecting rod (55) is provided 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 provided at the upper end of the limit rack (58), and the driving gear (512) and the limit rack (58) are meshed for transmission. The driving gear (512) is fixedly connected to the output end of the servo motor (511), and a fixed platform (510) is fixedly connected to the lower end of the servo motor (511). A limit bottom plate (56) is fixedly installed on one end of the connecting rod (55).

8. The method for using the soil pretreatment device for contaminated soil remediation according to claims 1-7, characterized in that: The specific steps include: Step 1: Start the water pump (63), the water pump (63) pumps the bactericidal agent out of the agent box (61) through the drug delivery pipe (64) and into the circulation pipe (65), and then evenly sprays it out through the atomizing nozzles (67) in the multiple drug distribution pipes (66), start the servo motor (511) power supply, 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, and the connecting rod (55) The driving frame (54) drives the moving rod (53) to move, and the moving rod (53) transmits power to the synchronization rod (52), so that the synchronization rod (52) drives the central fixed shaft (50) to rotate, and then the central fixed shaft (50) drives the mixing plate (51) to rotate back and forth, so that the plurality of mixing plates (51) swing simultaneously, and the soil is stirred, so that the contaminated soil and the bactericidal agent are mixed more evenly, and the bactericidal 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; Step 2: Start the power supply on the driving walking component (2), so that the electric walking wheels (22) on both sides of the walking support frame (21) start to drive the driving walking component (2) and the support box component (3) in the driving walking component (2) to move synchronously along the direction of the repair groove (1), the atomizing nozzle (67) sprays in the front, and the plurality of mixing plates (51) are located behind the atomizing nozzle (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 platform (11), due to the limitation of the positioning column (48), the steering rod (47) rotates, thereby driving the mounting plate (45) to rotate, and the mounting plate (45) transmits power to the incomplete gear (46). The incomplete gear (46) drives the mounting gear (49) to rotate through meshing transmission, and then 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) is turned over, and the positions of the atomizing nozzle (67) and the mixing plate (51) are turned over. At this time, the driving walking assembly (2) moves back and repeats the operation of the atomizing nozzle (67) spraying the agent in the front and the mixing plate (51) stirring the soil in the back.

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