Soil in-situ dynamic remediation device and method of modularized layered wedge-shaped filling body

Abstract

The invention discloses a soil in-situ dynamic remediation device and method of a modular layered wedge-shaped filling body, and belongs to the technical field of in-situ soil remediation. A soil excavation drilling machine module in the device body is arranged in a front bin of the device body, and the soil excavation drilling machine module is used for excavating a vertical groove pit with a preset depth; a plurality of wedge-shaped filling bodies are mounted in a storage bin in the walking chassis module; and the filling body putting module is located above the storage bin, grabs the wedge-shaped filling body and puts the wedge-shaped filling body into the vertical groove pit. According to the intelligent in-situ technical equipment, layered precise remediation is conducted on the soil profile, remediation units can be dynamically updated and managed for a long time, fixation / passivation / activity reduction of heavy metal is achieved through multiple mechanisms such as mineral precipitation, complexation, reduction and ion exchange, and therefore the key direction of the development bottleneck of the current soil remediation industry is broken through.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of in-situ soil remediation, and particularly relates to a soil in-situ dynamic remediation device and method of a modular layered wedge-shaped filling body. BACKGROUND

[0002] Currently, soil heavy metal pollution remediation is a major challenge in the global environmental field. Although existing technologies, such as soil replacement, leaching, solidification and stabilization, and permeable reactive barrier (PRB), have been applied to some extent, they all have significant limitations and cannot meet the urgent need for efficient, precise and sustainable remediation of contaminated soil. Specifically, ex-situ remediation technologies (such as soil replacement and leaching) usually require excavation and transportation of large amounts of soil, which not only has high cost and high energy consumption, but also severely damages soil structure and ecosystem integrity. The leaching process may also produce wastewater enriched with pollutants, posing a risk of secondary pollution. Widely studied in-situ remediation technologies, such as solidification and stabilization and PRB, avoid large-scale excavation, but their core defects are as follows: first, soil is generally treated as a homogeneous body using a single chemical agent or reactive material, ignoring the significant differences in physicochemical properties, pollutant types and enrichment levels among parent material layer, accumulation layer, leaching layer and organic matter layer in the soil profile, resulting in blind spots or over-repair in remediation, with low efficiency. Second, the remediation body is usually a permanent structure, and the active materials (such as adsorbents and passivators) therein cannot be updated after reaching adsorption saturation or failure, and the remediation effect decreases or even fails over time, making it impossible to achieve long-term monitoring and sustainable management of contaminated sites. Third, the entire remediation process is highly dependent on manual operation, and lacks automated and intelligent equipment support for material injection and effect evaluation, resulting in low efficiency and high risk of personnel exposure.

[0003] The four technical bottlenecks in the current soil remediation field are as follows: 1. Lack of layered pollution treatment Existing technologies (such as solidification and stabilization, and PRB) cannot match different adsorption materials to the pollution differences among the organic matter layer, leaching layer, accumulation layer and parent material layer in the soil profile, resulting in low remediation efficiency.

[0004] 2. Non-renewable remediation body Traditional in-situ remediation bodies are permanent structures that cannot be replaced after adsorption saturation, causing the remediation effect to decline over time (such as the re-precipitation of chromium after the failure of iron filings in PRB).

[0005] 3. Low automation level Current slotting, injection and replacement all rely on manual operation, which is low in efficiency and exposes personnel to contaminated environments (such as the health risks of manual excavation of cadmium-containing soil).

[0006] 4. Remediation-monitoring disconnection The prior art lacks a real-time monitoring mechanism for the performance of the prosthesis, and it is difficult to timely trigger maintenance actions (such as not integrating resistivity sensors to predict adsorption saturation). SUMMARY

[0007] The present application aims to solve the above problems in the prior art by providing a soil in-situ dynamic repair device and method of modular layered wedge-shaped filling body.

[0008] To achieve the above-mentioned purposes, the technical solutions adopted by the present application are as follows: In a first aspect, a soil in-situ dynamic repair device of modular layered wedge-shaped filling body comprises a device body; a traveling chassis module, a filling body launching module, a soil excavation drill module, and a plurality of wedge-shaped filling bodies are arranged in the device body; The soil excavation drill module is arranged in the front compartment of the device body, and the soil excavation drill module is used to excavate a vertical slot pit of a predetermined depth; the plurality of wedge-shaped filling bodies are installed in the storage compartment in the traveling chassis module; the filling body launching module is located above the storage compartment, and the filling body launching module grabs the wedge-shaped filling body and launches it into the vertical slot pit.

[0009] Further, the traveling chassis module comprises a mechanical top cover, a power-driven machine, a traveling chassis, and wheels; The mechanical top cover is located above the traveling chassis; four wheels are respectively arranged on both sides of the traveling chassis and are connected through a traveling track linkage between the two wheels on the same side; the wheels are connected with the power-driven machine through a rotating shaft, and a shock absorber is installed at the connection between the wheels and the traveling chassis.

[0010] Further, the filling body launching module comprises a mechanical arm fixed rod, a telescopic mechanical arm, a mechanical clamp fixing device, and a mechanical clamp; The number of mechanical arm fixed rods is two, one end of the mechanical arm fixed rod is fixed to the device body, and the other end is connected with one end of the hydraulic mechanical arm; the other end of the hydraulic mechanical arm is connected with a mechanical arm rotating shaft; the mechanical arm rotating shaft is connected with one end of a mechanical connecting rod; both mechanical connecting rods are connected with a rotating mechanical rod; the rotating end of the rotating mechanical rod is connected with one end of the telescopic mechanical arm, and the fixed end of the rotating mechanical rod is connected with one end of the telescopic hydraulic mechanical arm; the other end of the telescopic mechanical arm is connected with the rotating end of the mechanical rotating shaft, and the other end of the telescopic hydraulic mechanical arm is connected with the fixed end of the mechanical rotating shaft, and the mechanical clamp fixing device is connected to the end of the telescopic hydraulic mechanical arm; a plurality of mechanical clamp arm rods are connected to the lower end of the mechanical clamp fixing device, and the free ends of the plurality of mechanical clamp arm rods are connected with the mechanical clamp.

[0011] Further, the center axis of the hydraulic mechanical arm and the center axis of the mechanical connecting rod are coplanar and perpendicular to each other.

[0012] Further, a groove is formed along the length direction of the telescopic mechanical arm, and the telescopic hydraulic mechanical arm is located in the groove.

[0013] Further, the soil excavation drill module comprises a threaded rotating rod, a drill fixing device, and a track platform fixing device. The threaded rotating rod is arranged in a vertical direction, the top of the threaded rotating rod is connected with a driving motor, the bottom of the threaded rotating rod passes through a rotating part, a drill fixing device, and a track platform fixing device in sequence, and the bottom of the threaded rotating rod is connected with a drill bit or another threaded rotating rod; the drill fixing device is located above the track platform fixing device and is connected with the rotating part. The two ends of the track platform fixing device are fixed on the inner wall of the front bin of the device body, a drill horizontal moving platform is arranged on the track platform fixing device, and a drill moving track is arranged on the drill horizontal moving platform.

[0014] Further, the rotating part is a cylindrical structure, the inside of the rotating part is hollow, a threaded bearing is fixed at the upper end opening and the lower end opening of the rotating part respectively, and an inner thread is designed on the inner ring of the threaded bearing; the threaded rotating rod is threadedly connected with the threaded bearing. The drill fixing device comprises two drill connecting rods, two drill telescopic mechanical arms, and a drill hydraulic telescopic arm; the two drill connecting rods are arranged at intervals on the two sides, the two drill connecting rods are connected with the two drill telescopic mechanical arms, the drill hydraulic telescopic arm is located between the two drill telescopic mechanical arms, and the two ends of the drill hydraulic telescopic arm are connected with the two drill connecting rods respectively; one of the two drill connecting rods is connected with the rotating part shell, and the other drill connecting rod is fixed on the inner wall of the front bin of the device body.

[0015] Further, the wedge-shaped filler has a wedge shape, and the inside of the wedge-shaped filler comprises a chamber A, a chamber B, a chamber C, and a chamber D from top to bottom, which are separated by partitions in sequence, and the four chambers correspond to the organic matter layer, the leaching layer, the deposition layer, and the parent material layer of the soil in sequence; the side surface and the top surface of each chamber are grids, and the pore size of the top grid of the chamber A, the chamber B, the chamber C, and the chamber D decreases in sequence; the chamber A is filled with an organic matter-zeolite composite material, the chamber B is filled with a zero-valent iron-bentonite composite material, the chamber C is filled with an apatite-zeolite composite material, and the chamber D is filled with a sodium sulfide slow-release bentonite composite material.

[0016] Further, the method further comprises a resistivity detection device; and the resistivity detection device is inserted into the wedge-shaped filler in a vertical direction.

[0017] In a second aspect, a soil in-situ dynamic remediation method of a replaceable modular layered wedge-shaped filler is provided, and the method comprises the following steps. S1, moving the soil in-situ dynamic remediation device to a predetermined working position. S2, control the soil excavation drill module to drive the drill bit to go down and excavate a vertical slot pit of a predetermined depth; S3, after excavation, control the drill bit to be lifted to the ground; S4, control the filling body throwing module, the mechanical arm grabs a wedge-shaped filling body with a preset filling formula from the storage bin, aligns the wedge-shaped filling body with the vertical slot pit, and then vertically presses the wedge-shaped filling body into the vertical slot pit, completing the installation; S5, real-time acquisition of soil resistivity data is performed by using a resistivity detection device; S6, when it is monitored that four layers of filling formulas in the layered wedge-shaped filling body are adsorbed and saturated or the element content in a layer needs to be improved, a prefabricated wedge-shaped filling body is replaced through a soil in-situ dynamic remediation device.

[0018] The soil in-situ dynamic remediation device and method of the modular layered wedge-shaped filling body provided by the application have the following beneficial effects: 1, the application first introduces the concept of a replaceable vertical passivation wall into in-situ soil remediation, changes the passivation material from a one-time consumable to a recyclable consumable, and breaks through the industry problem that PRB technology cannot be updated after adsorption saturation.

[0019] 2, the application develops an intelligent in-situ technology equipment that can perform layered accurate remediation on the soil profile and dynamically update and long-term manage the remediation unit, realizes the fixation / passivation / deactivation of heavy metals through multiple mechanisms such as mineral precipitation, complexation, reduction and ion exchange, and breaks through the key direction of the current soil remediation industry development bottleneck.

[0020] 3, accurate soil profile management is realized; the existing technology is mainly homogeneous injection, without considering the vertical distribution difference of pollutants in the soil profile, the application designs a four-layered wedge-shaped filling body (organic layer / leaching layer / deposited layer / parent material layer), each layer fills a non-metallic mineral composite material for specific pollutants, solves the problem of remediation blind area caused by the traditional technology of regarding soil as a homogeneous body, and the four-layered wedge-shaped module can be disassembled and replaced, can make the effective state of heavy metals in the soil decrease by more than 70%, the exchangeable state decrease by more than 80%, and supplement the beneficial elements in the soil.

[0021] 4, break through the long-term bottleneck of in-situ remediation; the replaceable layered wedge-shaped filling body design is created, the mechanical device realizes the automatic pulling out of the failed module and the implantation of the new module, overcomes the defect that the existing PRB technology cannot be updated after adsorption saturation, and solves the problem that the traditional passivation / stabilization technology cannot be replaced and the remediation effect decreases once the material fails.

[0022] 5, build an intelligent repair closed loop; integrate the whole process automation of soil excavation-module throwing-effect monitoring-dynamic replacement, reduce manual intervention, and reduce operation risk.

[0023] 6、The application realizes the "symptomatic treatment" of heavy metal pollution in different layers of soil profile by filling different functional materials in layers, and the repair efficiency and completeness are much higher than that of homogeneous repair method. The resistivity monitoring device in the middle of the wedge-shaped module samples the resistivity changes in the four layers of soil profile in real time, and the PH, EC and heavy metal content in the soil are inversed, which is convenient for monitoring the soil quality. The mineral component modular design in the wedge-shaped module makes the filling body convenient to replace, solves the industry problems of short effective period and difficulty in updating after failure of traditional in-situ repair technology, and realizes the "long-term management" of soil repair.

[0024] 7、The application integrates excavation and delivery in one, has high automation degree, reduces manual operation, and improves construction efficiency and quality consistency. And natural non-metallic minerals are used as main materials to avoid secondary pollution, and part of the materials (such as organic matter) can also supplement soil fertility. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structure schematic view of the soil in-situ dynamic repair device of the modular layered wedge-shaped filling body in the embodiment.

[0026] Figure 2 It is a structure schematic view of the filling body delivery module in the embodiment.

[0027] Figure 3 It is a structure schematic view of the soil excavation drill module in the embodiment.

[0028] Figure 4 It is a structure schematic view of the wedge-shaped filling body in the embodiment.

[0029] Figure 5 It is a soil four-layer profile repair work schematic view in the embodiment.

[0030] Figure 6 It is a structure schematic view of the resistivity detection device in the embodiment.

[0031] 1, mechanical top cover; 2, power drive machine; 3, walking chassis; 4, shock absorber; 5, wheel; 6, mobile track; 7, rotating shaft; 8, mechanical arm fixed rod; 9, hydraulic mechanical arm; 10, mechanical arm rotating shaft; 11, rotating mechanical rod; 12, mechanical connecting rod; 13, telescopic mechanical arm; 14, telescopic hydraulic mechanical arm; 15, mechanical rotating shaft; 16, mechanical tongs fixing device; 17, mechanical tongs arm rod; 18, mechanical tongs; 19, threaded rotating rod; 20, threaded bearing; 21, drilling machine fixing device; 22, drilling machine connecting rod; 23, drilling machine telescopic mechanical arm; 24, drilling machine hydraulic telescopic arm; 25, drilling machine fixer; 26, drilling machine horizontal moving platform; 27, drill bit; 28, drilling machine moving track; 29, circular pulley; 30, track platform fixing device; 31, hole; 32, wedge-shaped filler; 33, front safety cover. DETAILED DESCRIPTION

[0032] The specific embodiments of the present application are described below to facilitate the understanding of the present application for those skilled in the art, but it should be clear that the present application is not limited to the scope of the specific embodiments, and for those skilled in the art, it is obvious that various changes are within the spirit and scope of the present application defined and determined by the appended claims, and all the inventions utilizing the concept of the present application are within the scope of protection.

[0033] The soil in-situ dynamic remediation device and method of the modular layered wedge-shaped filler 32 of the present embodiment injects wedge-shaped fillers 32 matching the pollution type into the groove, regularly monitors the concentration of pollutants, and if the concentration rebounds, replaces the old module and injects a new module to realize cyclic remediation; and the system can be automatically excavated, placed and replaced; at the same time, the layered precise strategy is adopted, and the function layer by layer progresses according to the principle of targetedness from top to bottom, and the function from improving ecology to controlling migration to core fixation to final barrier, forming a complete, efficient and multiple defense and remediation system, as shown in Figure 1 , which specifically comprises: The device body is provided with a traveling chassis 3 module, a filler placing module, a soil excavation drilling machine module and a plurality of wedge-shaped fillers 32.

[0034] In some embodiments, the soil excavation drilling machine module is arranged in the front compartment of the device body, and the soil excavation drilling machine module is used to excavate a vertical groove pit of a predetermined depth; the plurality of wedge-shaped fillers 32 are installed in the storage compartment in the traveling chassis 3 module; the filler placing module is located above the storage compartment, and the filler placing module grabs the wedge-shaped filler 32 and places it into the vertical groove pit.

[0035] Among them, the bottom compartment door (not shown in the figure) is opened at the bottom of the front compartment of the device body, and the bottom compartment door can be opened when excavating the groove and placing the wedge-shaped filler 32; a front safety cover 33 is arranged above the front compartment.

[0036] In a specific embodiment, referring to Figure 1 , the traveling chassis 3 module includes a mechanical top cover 1, a power drive machine 2, a traveling chassis 3, a shock absorber 4, a wheel 5, a mobile track 6, and a rotating shaft 7. The mechanical top cover 1 is located above the walking chassis 3, four wheels 5 are arranged on both sides of the walking chassis 3, two wheels 5 on the same side are connected through the action track 6, the wheel 5 is connected with the electric power driving machine 2 through the rotating shaft 7, and the shock absorber 4 is arranged at the connection position of the wheel 5 and the walking chassis 3.

[0037] In a specific embodiment, referring to Figure 2 , the filling body throwing module comprises a mechanical arm fixing rod 8, a hydraulic mechanical arm 9, a mechanical arm rotating shaft 10, a rotating mechanical rod 11, a mechanical connecting rod 12, a telescopic mechanical arm 13, a telescopic hydraulic mechanical arm 14, a mechanical rotating shaft 15, a mechanical clamp fixing device 16, a mechanical clamp arm rod 17, and a mechanical clamp 18. The two mechanical arm fixing rods 8 are fixed on the device body, one end of the mechanical arm fixing rod 8 is connected with one end of the hydraulic mechanical arm 9, the other end of the hydraulic mechanical arm 9 is connected with the mechanical arm rotating shaft 10, the mechanical arm rotating shaft 10 is connected with one end of the mechanical connecting rod 12, the two mechanical connecting rods 12 are connected with the rotating mechanical rod 11, one end of the rotating mechanical rod 11 is connected with the telescopic mechanical arm 13, the fixed end of the rotating mechanical rod 11 is connected with one end of the telescopic hydraulic mechanical arm 14, the other end of the telescopic mechanical arm 13 is connected with the rotating end of the mechanical rotating shaft 15, the other end of the telescopic hydraulic mechanical arm 14 is connected with the fixed end of the mechanical rotating shaft 15, and the mechanical clamp fixing device 16 is connected with the telescopic hydraulic mechanical arm 14, a plurality of mechanical clamp arm rods 17 are connected with the lower end of the mechanical clamp fixing device 16, and the free ends of the plurality of mechanical clamp arm rods 17 are connected with the mechanical clamps 18. The central axis of the hydraulic mechanical arm 9 and the central axis of the mechanical connecting rod 12 are coplanar and perpendicular to each other. The telescopic mechanical arm 13 is provided with a groove along the length direction, and the telescopic hydraulic mechanical arm 14 is located in the groove.

[0038] In the specific operation, the two hydraulic mechanical arms 9 work simultaneously, can drive the whole filling body throwing module to move forward and backward, so as to move the mechanical clamps 18 to the upper side of the wedge-shaped filling body 32, and then the mechanical clamps 18 are hung in the handle of the wedge-shaped filling body 32 through manual operation, so as to realize the grabbing of the wedge-shaped filling body 32.

[0039] More specifically, by controlling the hydraulic mechanical arms 9 separately or at different times, the steering of the whole filling body throwing module can be realized.

[0040] More specifically, by controlling the telescopic hydraulic mechanical arm 14, the height of the whole filling body throwing module can be adjusted, so as to realize the rising and falling of the filling body throwing module, and then realize the grabbing and throwing process of the wedge-shaped filling body 32; that is, by controlling the two hydraulic mechanical arms 9 and the telescopic hydraulic mechanical arm 14, the grabbing, conveying and throwing operation of the wedge-shaped filling body 32 can be realized.

[0041] In a specific embodiment, referring to Figure 3 , referring to Figure 3 , the soil excavation drill module comprises a threaded rotating rod 19, a threaded rotating barrel 20, a drill fixing device 21, a drill fixing bearing 22, a drill telescopic mechanical arm 23, a drill hydraulic telescopic arm 24, a drill fixer 25, a drill horizontal moving platform 26, a drill bit 27, a drill moving track 28, a circular pulley 29, and a track platform fixing device 30. The threaded rotating rod 19 is arranged in a vertical direction, and the top of the threaded rotating rod 19 is connected with a driving motor for driving the threaded rotating rod 19 to rotate. When the entire device is moving (not reaching the target position), the driving motor is not connected with the threaded rotating rod 19, and is installed on site when pit digging is needed.

[0042] The bottom of the threaded rotating rod 19 passes through a rotating part, the drill fixer 25, and the track platform fixing device 30 in sequence, and the bottom free end is connected with another threaded rotating rod 19 or directly connected with the drill bit 27. The drill fixing device 21 is located above the track platform fixing device 30 and is connected with the rotating part. The rotating part itself does not rotate and is connected with the drill fixing device 21. The rotating part is a cylindrical structure with an inner hole 31. The upper and lower openings of the rotating part are respectively fixed with threaded bearings 20, and the inner ring of the threaded bearing 20 is designed as an internal thread. The threaded rotating rod 19 is threadedly connected with the threaded bearing 20. In this way, when the threaded rotating rod 19 rotates, the rotating part does not move due to the action of the threaded bearing 20, and thus the displacement of the drill fixing device 21 is not affected.

[0043] It should be noted that, in order not to affect the horizontal movement of the threaded rotating rod 19, during specific operation, the drill hydraulic telescopic arm 24 controls the telescopic length of the drill telescopic mechanical arm 23, thereby controlling the movement of the threaded rotating rod 19 along the drill moving track 28, and finally moving the threaded rotating rod 19 to a specified position. At this time, according to the required pit digging depth, the second threaded rotating rod 19 (the length of the second threaded rotating rod can be determined according to requirements) is connected with the current first threaded rotating rod 19 through a shaft coupling, and then the drill bit 27 is connected at the free end of the second threaded rotating rod 19. At the same time, the driving motor is connected at the top of the first threaded rotating rod 19, and the driving motor can be temporarily fixed on the mechanical top cover 1 for operation. The entire operation process needs to be completed with the assistance of manual operation.

[0044] The two ends of the track platform fixing device 30 are fixed on the inner wall of the front compartment of the device body, and the drill horizontal moving platform 26 is arranged on the track platform fixing device 30. The drill moving track 28 is arranged on the drill horizontal moving platform 26.

[0045] The drilling rig fixing device 21 comprises two drilling rig connecting rods 22, two drilling rig telescopic mechanical arms 23, and a drilling rig hydraulic telescopic arm 24. The two drilling rig connecting rods 22 are arranged at intervals on the two sides, and are connected with the two drilling rig telescopic mechanical arms 23. The drilling rig hydraulic telescopic arm 24 is located between the two drilling rig telescopic mechanical arms 23, and the two ends of the drilling rig hydraulic telescopic arm 24 are connected with the two drilling rig connecting rods 22 respectively. One of the two drilling rig connecting rods 22 is connected with the rotating part shell, and the connection mode can be bolted. The other drilling rig connecting rod 22 is fixed on the inner wall of the front compartment of the device body, and the connection mode can be through bolts or hinges. The drilling rig telescopic mechanical arm 23 telescopes with the drilling rig hydraulic telescopic arm 24.

[0046] In the specific operation, the telescopic length of the drilling rig telescopic mechanical arm 23 can be controlled through the drilling rig hydraulic telescopic arm 24, and then the movement of the threaded rotating rod 19 along the drilling rig movement track 28 is controlled, and finally the drill bit 27 is moved to the designated position.

[0047] It should be noted that the grabbing, transporting, and dropping of the wedge-shaped filler 32 and the vertical groove digging operation can be assisted and positioned in cooperation with the movement of the walking chassis 3 module.

[0048] In a specific embodiment, referring to Figure 4 The wedge-shaped filler 32 is wedge-shaped, and from top to bottom, it comprises a chamber A, a chamber B, a chamber C, and a chamber D separated by partitions in sequence. The four chambers correspond to the organic matter layer, the leaching layer, the accumulation layer, and the parent material layer of the soil in sequence. The side and top surfaces of each chamber are grid-shaped, and the pore size of the top grid of the chamber A, the chamber B, the chamber C, and the chamber D decreases in sequence. The chamber A is filled with organic matter-zeolite composite material, the chamber B is filled with zero-valent iron-bentonite composite material, the chamber C is filled with apatite-zeolite composite material, and the chamber D is filled with sodium sulfide slow-release bentonite composite material.

[0049] Referring to Figure 5 More specifically: The chamber A (upper part, corresponding to the organic matter layer) can be filled with organic matter-zeolite composite material rich in humic acid, which is used to adsorb heavy metals and improve soil fertility. The chamber B (corresponding to the leaching layer) can be filled with zero-valent iron-bentonite composite material, which is mainly used to reduce and adsorb Cr(VI), As, and other strong migratory heavy metals. The chamber C (corresponding to the accumulation layer) can be filled with apatite-zeolite composite material, which is used to strongly fix heavy metals such as Pb and Cd. The chamber D (lower part, corresponding to the parent material layer) can be filled with sodium sulfide slow-release bentonite composite material, which serves as the final barrier to form metal sulfide precipitates and prevent the downward infiltration of pollutants.

[0050] Four-layered wedge-shaped filler 32 simulation. This embodiment is designed for a typical soil scenario suffering from multiple heavy metal complex pollution. The wedge-shaped filler 32 is inserted into the soil from top to bottom, and each layer corresponds to a different layer of soil and bears a specific remediation and improvement function. For example: the four-layered wedge-shaped filler 32 injection system has four wedge-shaped modules (A / B / C / D), each composed of different non-metallic mineral composite materials: for example: chamber A (organic surface layer): biochar + zeolite, adsorbing PAHs and pesticides in the organic matter layer; chamber B (leaching layer): apatite + bentonite, fixing Cd, Pb, and Zn; chamber C (sedimentation layer): hydroxyapatite + ferrite, fixing As, Cr, and Cu; chamber D (parent material layer): calcium carbonate + montmorillonite, buffering pH and fixing Ni and Co; the outer shell of the layered wedge-shaped filler 32 is biodegradable PLA + basalt fiber, which naturally degrades in 6-12 months, releasing and absorbing beneficial and harmful metal ions in the soil.

[0051] The specific design method is as follows: ① Organic layer (the uppermost part of the wedge-shaped module, layer A); mainly to intercept surface pollutants, supplement organic matter, and improve soil ecology. It is greatly affected by organic pollution and acid rain, and is the gateway to the soil ecosystem. The main non-metallic mineral material combination: high-quality biochar, with added components 1: humic acid particles, added components; 2: a small amount of limestone particles, added components; 3: limestone, biochar: with a large specific surface area and abundant pores, it can adsorb a wide range of heavy metals (Cd, Pb, Cu, Zn, Ni), and at the same time, it is an excellent soil conditioner that can retain water and fertilizer, promote microbial reproduction. Humic acid: strong complexing ability, can fix heavy metals, and more importantly, as organic matter directly supplements the fertility of the surface soil. Limestone: slowly neutralizes acid rain or acid produced by the decomposition of organic matter, preventing heavy metals from being activated and leached in an acidic environment.

[0052] ② Leaching layer (the second layer from the top of the wedge-shaped module, layer B); mainly to control the vertical migration of pollutants and target treatment of easily soluble heavy metals. Pollutants migrate downward with the water flow, and Cr(VI) and As have the strongest migration in this layer. The main non-metallic mineral material combination: added component 1: modified bentonite, added component; 2: zero-valent iron (ZVI) powder, added component; 3: quartz sand. Zero-valent iron (ZVI): is a king material for treating Cr(VI) and As. Through redox reaction, it reduces Cr(VI) to Cr(III) and adsorbs and co-precipitates As, effectively fixing these two most difficult-to-treat heavy metals. Modified bentonite: good swelling, high cation exchange capacity (CEC), as a substrate it can assist in adsorbing other cationic heavy metals (Cd, Pb, etc.), and ensure uniform dispersion of ZVI. Quartz sand: adjusts the permeability of the filler, prevents the swelling of bentonite from causing blockage, and ensures smooth water flow and reaction.

[0053] ③Deposition layer (wedge-shaped module third layer, C layer, core repair layer); mainly for balancing high-strength fixed heavy metals, this layer is the most important heavy metal enrichment layer, with the highest concentration, mainly Pb, Cd, Zn, Cu, etc. The main non-metallic mineral material combination: additive component 1: apatite, additive component; 2: zeolite powder, additive component; 3: a small amount of sepiolite. Apatite: is a special medicine for fixing Pb and Cd. It can form a phosphate mineral with them (such as chlorophosphate lead), which has extremely low solubility, achieving permanent stabilization, far exceeding simple adsorption. Zeolite: has high ion exchange capacity, as a broad-spectrum adsorbent, cooperates with Cu, Zn, Ni and other cationic heavy metals. Sepiolite: excellent adsorption and catalytic performance, supplement and strengthen the overall adsorption capacity.

[0054] ④Parent layer (wedge-shaped module fourth layer, D layer, safety barrier layer); is the ultimate barrier of the soil layer, blocking deep infiltration and protecting groundwater safety. Therefore, it needs very low permeability and the strongest fixation ability. The main non-metallic mineral material combination: additive component 1: the main substrate is a bentonite-sand mixed substrate core, additive component; 2: slow-release sulfide agent (such as calcium sulfide). Bentonite-sand substrate: forms a low-permeability physical barrier, significantly slowing down the water flow rate. Slow-release sulfide agent: the S² - ion slowly released by it can react with most heavy metal ions such as Hg, Cd, Pb, Cu, etc. to form extremely insoluble metal sulfide precipitates. This is the most stable and most complete fixation method known so far, providing the ultimate protection for groundwater.

[0055] In a specific embodiment, the specific over-standard heavy metal species in different layers of the soil profile can be used to customize the filling of the corresponding adsorption minerals, as shown in Table 21; Reference Figure 6 In a specific embodiment, it also includes a resistivity detection device; the resistivity detection device is inserted in the vertical direction in the wedge-shaped filling body 32.

[0056] The resistivity data in the four-layer soil profile corresponding to the chambers A, B, C, and D can be monitored in real time, and the geochemical conditions in the soil can be inverted. The resistivity detection device uses existing technology to realize the linkage analysis of pH, EC (electrical conductivity), and heavy metal over-standard early warning.

[0057] In some embodiments, a replaceable modular layered wedge-shaped filling body 32 is provided for a soil in-situ dynamic repair method, which includes the following steps: S1, moving the soil in-situ dynamic repair device to a predetermined work station; S2, controlling the soil excavation drill module to drive the drill bit 27 downward to excavate a vertical slot pit with a predetermined depth; S3, after the excavation is completed, the drill bit 27 is controlled to be lifted to the ground; S4, the filling body throwing module is controlled, the mechanical arm grabs a wedge-shaped filling body 32 with a preset filling formula from the storage bin, and the wedge-shaped filling body 32 is aligned with the vertical groove, and then the wedge-shaped filling body 32 is vertically pressed into the vertical groove, and the installation is completed; S5, the soil resistivity detection device is used to collect soil resistivity data in real time; S6, when it is monitored that four layers of filling formulas in the layered wedge-shaped filling body 32 are adsorbed and saturated or the element content in a layer needs to be improved, the prefabricated wedge-shaped filling body 32 is replaced through the soil in-situ dynamic remediation device.

[0058] Although the specific embodiments of the application are described in detail with reference to the accompanying drawings, it should not be understood as limiting the protection scope of the patent. Various modifications and variations made by those skilled in the art within the scope described in the claims are still within the protection scope of the patent.

Claims

1. A soil in-situ dynamic remediation device with replaceable modular layered wedge-shaped filler, characterized in that, The device includes a main body; the main body is equipped with a walking chassis module, a filler delivery module, a soil excavation drilling rig module, and several wedge-shaped fillers. The soil excavation drilling module is located in the front compartment of the device body and is used to excavate vertical trenches of a preset depth. Several wedge-shaped fillers are installed in the storage compartment of the walking chassis module. The filler delivery module is located above the storage compartment and grabs the wedge-shaped fillers and delivers them into the vertical trenches.

2. The soil in-situ dynamic remediation device with replaceable modular layered wedge-shaped filler according to claim 1, characterized in that, The walking chassis module includes a mechanical top cover, an electric drive unit, a walking chassis, and wheels; The mechanical top cover is located above the walking chassis; four wheels are respectively located on both sides of the walking chassis, and the two wheels on the same side are linked by the moving track; the wheels are connected to the electric drive motor through the rotating shaft, and shock absorbers are installed at the connection between the wheels and the walking chassis.

3. The soil in-situ dynamic remediation device with replaceable modular layered wedge-shaped filler according to claim 1, characterized in that, The filler delivery module includes a robotic arm fixing rod, a telescopic robotic arm, a mechanical clamp fixing device, and a mechanical gripper. The robotic arm has two fixed rods. One end of each fixed rod is fixed to the main body of the device, and the other end is connected to one end of a hydraulic robotic arm. The other end of the hydraulic robotic arm is connected to the rotating shaft of the robotic arm. The rotating shaft of the robotic arm is connected to one end of a mechanical link. Both mechanical links are connected to a rotating mechanical rod. The rotating end of the rotating mechanical rod is connected to one end of a telescopic robotic arm, and the fixed end of the rotating mechanical rod is connected to one end of a telescopic hydraulic robotic arm. The other end of the telescopic robotic arm is connected to the rotating end of the mechanical rotating shaft, and the other end of the telescopic hydraulic robotic arm is connected to the fixed end of the mechanical rotating shaft. A mechanical clamp fixing device is connected to this end of the telescopic hydraulic robotic arm. The lower end of the mechanical clamp fixing device is connected to multiple mechanical clamp arms, and the free ends of the multiple mechanical clamp arms are all connected to mechanical grippers.

4. The soil in-situ dynamic remediation device with replaceable modular layered wedge-shaped filler according to claim 3, characterized in that, The central axis of the hydraulic robotic arm is coplanar with and perpendicular to the central axis of the mechanical link.

5. The soil in-situ dynamic remediation device with replaceable modular layered wedge-shaped filler according to claim 3, characterized in that, The telescopic robotic arm has a groove along its length, and the telescopic hydraulic robotic arm is located in the groove.

6. The soil in-situ dynamic remediation device with replaceable modular layered wedge-shaped filler according to claim 1, characterized in that, The soil excavation drilling rig module includes a threaded rotating rod, a drilling rig fixing device, and a track platform fixing device; The threaded rotating rod is arranged vertically, with its top connected to the drive motor, and its bottom passing through the rotating component, the drilling rig fixing device, and the track platform fixing device in sequence. Its bottom is connected to the drill bit or other threaded rotating rods. The drilling rig fixing device is located above the track platform fixing device and is connected to the rotating component. The two ends of the track platform fixing device are fixed to the inner wall of the front compartment of the device body, and the track platform fixing device is equipped with a drilling rig horizontal moving platform; the drilling rig horizontal moving platform is equipped with a drilling rig moving track.

7. The soil in-situ dynamic remediation device with replaceable modular layered wedge-shaped filler according to claim 6, characterized in that, The rotating part has a cylindrical structure with a hollow interior. Threaded bearings are fixed at the upper and lower openings, and the inner ring of the threaded bearings is designed with internal threads. The threaded rotating rod is threadedly connected to the threaded bearings. The drilling rig fixing device includes two drilling rig connecting rods, two drilling rig telescopic mechanical arms, and one drilling rig hydraulic telescopic arm; the two drilling rig connecting rods are spaced apart on both sides, and the two drilling rig connecting rods are connected to the two drilling rig telescopic mechanical arms. The drilling rig hydraulic telescopic arm is located between the two drilling rig telescopic mechanical arms, and both ends of the drilling rig hydraulic telescopic arm are connected to the two drilling rig connecting rods respectively. One of the drilling rig connecting rods is connected to the outer casing of the rotating component, and the other drilling rig connecting rod is fixed to the inner wall of the front chamber of the device body.

8. The soil in-situ dynamic remediation device with replaceable modular layered wedge-shaped filler according to claim 1, characterized in that, The wedge-shaped filler is wedge-shaped and includes, from top to bottom, four chambers: A, B, C, and D, which are sequentially separated by partitions. These four chambers correspond to the organic matter layer, leaching layer, sedimentary layer, and parent material layer of the soil, respectively. The sides and top of each chamber are grids, and the pore size of the top grids in chambers A, B, C, and D decreases sequentially. Chamber A is filled with an organic matter-zeolite composite material, chamber B is filled with a zero-valent iron-bentonite composite material, chamber C is filled with an apatite-zeolite composite material, and chamber D is filled with a sodium sulfide slow-release bentonite composite material.

9. The soil in-situ dynamic remediation device with replaceable modular layered wedge-shaped filler according to claim 8, characterized in that, It also includes a resistivity detection device; the resistivity detection device is inserted vertically into the wedge-shaped filler body.

10. A method for in-situ dynamic remediation of soil using a replaceable modular layered wedge-shaped filler according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Move the in-situ dynamic soil remediation device to the designated work site; S2. Control the soil excavation drilling rig module to drive the drill bit downward and excavate a vertical trench of a predetermined depth; S3. After excavation is completed, control the drill bit to be raised to the ground; S4. Control the filler delivery module. The robotic arm grabs a wedge-shaped filler with a preset filling formula from the storage bin, aligns the wedge-shaped filler with the vertical groove, and then presses the wedge-shaped filler vertically into the vertical groove to complete the installation. S5. Use a resistivity detection device to collect soil resistivity data in real time; S6. When it is detected that the adsorption of the four layers of filling formula in the layered wedge filler is saturated or the element content in a certain layer needs to be improved, the prefabricated wedge filler is replaced by the soil in-situ dynamic remediation device.

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