Soil remediation device and method for land space remediation

Abstract

The invention belongs to the technical field of soil remediation, and particularly relates to a soil remediation device and method for land space remediation, the soil remediation device comprises a base, a remediation bin body is fixedly mounted on the upper end face of the base, a remediation upper cover is fixedly mounted on the upper end face of the remediation bin body, and a pesticide spraying device is further fixedly mounted on the upper end face of the remediation upper cover; and an unrepaired soil feeding opening is further fixedly formed in one side of the upper end face of the repairing upper cover, and the unrepaired soil feeding opening penetrates through the repairing upper cover and communicates into the repairing bin body. Two functions of thermal desorption and chemical remediation are integrated, and remediation modes can be intelligently switched or used in a combined mode according to specific types (volatile / semi-volatile organic compounds, heavy metals or combined pollution) of soil pollutants; due to the integrated design, the investment of preparing special equipment for different pollution types is avoided, the universality and the operation efficiency of the equipment are remarkably improved, and the repair requirements of complex pollution sites can be met.

Description

Technical Field

[0001] This invention relates to the field of soil remediation technology, specifically to a soil remediation device and method for land and space remediation. Background Technology

[0003] The industry has developed various soil remediation technologies and equipment. Based on remediation principles, these can be mainly categorized into physical, chemical, and biological remediation methods, and are often implemented in engineering practice using specialized equipment. Recently disclosed technical solutions represent two mainstream ex-situ remediation equipment approaches: one is a treatment device centered on thermal desorption (such as CN119608750A), characterized by a preheating box containing crushing rollers and a vibrating frame to pre-crush, loosen, and preheat cohesive soil. The soil is then evenly spread onto an electrically heated remediation platform via sequentially rotating release plates, aiming to efficiently remove volatile organic compounds by optimizing the heat transfer process. The other is a treatment device centered on mechanochemical mixing (such as CN117000747A), characterized by multiple sets of soil-turning plates driven by a central shaft and side gear sets, rotating in opposite directions to forcibly crush and mix the soil. This, combined with an automatic feeding and screening system, aims to maximize and homogenize the contact and reaction between the soil remediation agent and soil particles, thereby stabilizing or degrading pollutants.

[0004] Despite significant advancements in existing technologies and equipment, numerous bottlenecks remain when facing large-scale, complex engineering scenarios such as land reclamation. Specifically, devices based on thermal desorption are severely limited in their treatment efficiency by the initial physical properties of the soil (e.g., high viscosity, high moisture). Although targeted preheating and crushing designs exist, maintaining a constant particle size during continuous large-scale treatment, preventing secondary agglomeration of preheated soil during transport, and managing the enormous energy costs and exhaust gas purification pressures resulting from high heat consumption remain challenging engineering practices. Devices based on mechanochemical mixing rely heavily on the uniformity of the agent-soil mixture for their remediation effectiveness. Existing mixing methods struggle to ensure sufficient and uniform contact between the agent and all soil particles under complex soil conditions, easily leading to remediation dead zones or agent waste, thus affecting the uniformity and reliability of the final remediation effect. More importantly, the two types of devices mentioned above are usually single-function devices, targeting organic or heavy metal pollution respectively, while actual contaminated sites often exhibit complex pollution characteristics. When faced with the need to use different technologies sequentially or in combination, multiple sets of equipment are often required to be connected in series or rotated, resulting in complex process flow, low site turnover rate, and a significant increase in equipment investment and operating costs, which greatly limits their applicability and economy in comprehensive remediation projects. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a soil remediation device and method for land space management, solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a soil remediation device and method for land and space remediation, comprising a base, a remediation chamber fixedly installed on the upper surface of the base, a remediation cover fixedly installed on the upper surface of the remediation chamber, a spraying device fixedly installed on the upper surface of the remediation cover, an unremediated soil inlet fixedly installed on one side of the upper surface of the remediation cover, the unremediated soil inlet penetrating the remediation cover and connecting to the remediation chamber, and an exhaust gas collection device fixedly installed on the upper surface of the remediation cover, the exhaust gas collection device having a channel for passing flue gas on its lower side, the channel penetrating the remediation cover and connecting to the internal space; The remediation chamber includes a driven device and an active power device fixedly connected to the two side walls. A soil remediation mixing and crushing structure is fixedly installed between the driven device and the active power device. A heat conduction plate is also fixedly installed between the two side walls, and a heating device is fixedly installed on the outside of the heat conduction plate.

[0008] As a preferred technical solution of the present invention, the soil remediation mixing and crushing structure includes an intermediate support cylinder fixedly connected to a driven device and an active power device. A plurality of cooling mixing plates A and cooling mixing plates B are fixedly installed on the outside of the intermediate support cylinder. A mixing structure bracket is fixedly installed on the outside of the plurality of cooling mixing plates A and cooling mixing plates B. A soil crushing device is fixedly installed on each of the plurality of cooling mixing plates A and cooling mixing plates B. The cooling stirring plate A and cooling stirring plate B are placed alternately.

[0009] As a preferred embodiment of the present invention, the intermediate support cylinder includes a support cylinder body, and a plurality of cooling water inlet connection ports and support pipe connection ports are provided on the periphery of the support cylinder body. An inlet / outlet partition plate and a spacer plate are fixedly installed at one end inside the support cylinder body. A cavity is provided between the inlet / outlet partition plate and the spacer plate. The cavity corresponds to a plurality of cooling water inlet connection ports. A cooling water receiving pipe is fixedly installed through the inlet / outlet partition plate.

[0010] As a preferred embodiment of the present invention, the cooling stirring plate B includes two side support pipes fixedly connected to the support pipe connection port. Two side support pipes are provided, and the two side support pipes are respectively fixedly installed on the support pipe connection ports on both sides of the support cylinder body. A plurality of intermediate cooling stirring pipes are fixedly installed between the two side support pipes. An edge crushing tooth device and a stirring scraping device are fixedly installed on one side of the plurality of intermediate cooling stirring pipes. The two side support pipes are connected to the plurality of intermediate cooling stirring pipes. One of the intermediate cooling stirring pipes is also fixedly connected to a cooling water inlet pipe, and the cooling water inlet pipe is also fixedly connected to a cooling water inlet connection port.

[0011] As a preferred embodiment of the present invention, the edge crushing tooth device includes a mounting plate fixedly connected to the intermediate cooling stirring pipe. A plurality of rotating mounting seats are fixedly mounted on one side of the mounting plate, and a connecting rod is fixedly mounted on the upper surface of one of the rotating mounting seats. A crushing tooth rod is fixedly mounted on the other end of the connecting rod. The mixing and scraping device includes a scraping plate body fixedly connected to an intermediate cooling mixing pipe, and the scraping plate body is provided with a plurality of scraping teeth.

[0012] As a preferred embodiment of the present invention, the stirring structure support includes two circular fixing rings installed on the outer sides of the cooling stirring plate A and the cooling stirring plate B. A plurality of intermediate connecting rods are fixedly installed between the two circular fixing rings. Two intermediate stirring rod fixing points are fixedly installed inside the plurality of intermediate connecting rods. A guide plate is fixedly installed on the outer side of the plurality of intermediate stirring rod fixing points. A two-sided support pipe connecting fixing plate is fixedly installed at one side of the circular fixing ring. A plurality of intermediate connecting rod fixing devices are fixedly installed on the outer side of the circular fixing ring. The intermediate connecting rod fixing devices are fixedly connected to the intermediate connecting rods. The intermediate stirring rod fixing point includes an intermediate fixing ring sleeved on the outer side of the support cylinder body. Several stirring tube fixing plates are fixedly installed on the outer side of the intermediate fixing ring, and a connecting piece is fixedly installed on the end of each stirring tube fixing plate away from the intermediate fixing ring.

[0013] As a preferred embodiment of the present invention, the heat conduction plate includes a heat conduction plate body, and a discharge port is fixedly installed on one side of the heat conduction plate body; a heating tube is fixedly installed on the outer side of the heat conduction plate body, and the heating tube is fixedly connected to the power supply connection point of the heating tube.

[0014] As a preferred embodiment of the present invention, a rotatable sealing head is fixedly installed at one end of the cooling water receiving pipe, and a cooling water inlet pipe is connected to one end of the rotatable sealing head. A thin-walled structure is provided at one end of the cooling water inlet pipe, and a groove corresponding to the thin-walled structure is provided at one end of the rotatable sealing head. The thin-walled feature and the groove enable the device to be connected while rotating.

[0015] As a preferred embodiment of the present invention, the spraying device includes a pesticide tank, a pesticide pump connected to the pesticide tank via a pipeline, a connecting spraying structure connected to the spraying pump via a pipeline, and a spray bar fixedly installed on the lower end face of the connecting spraying structure.

[0016] A soil remediation method for land space management includes the following steps: S1. Pollution Identification and Mode Selection: Analyze the pollution type of the soil to be remediated; if the main pollutant is volatile or semi-volatile organic compounds, initiate the thermal desorption remediation mode; if the main pollutant is heavy metals, initiate the chemical remediation mode; if the pollutants contain both organic matter and heavy metals, initiate the combined remediation mode. S2, thermal desorption repair mode, specifically includes: S21. Feeding and sealing: The soil to be repaired is fed into the repair chamber through the unrepaired soil inlet, and the unrepaired soil inlet and outlet are closed to form a sealed space. S22, Heating and Stirring Desorption: The heating device is activated, and heat is transferred to the interior of the remediation chamber through the heat conduction plate; simultaneously, the active power device is driven to rotate the soil remediation stirring and crushing structure as a whole; the cooling stirring plate A and cooling stirring plate B stir, turn and mix the soil; during the stirring process, the soil clod crushing device installed on it mechanically crushes the adhering soil clods, wherein the edge crushing tooth device impacts and crushes large soil clods, and the scraping teeth of the stirring scraping device scrape and refine the soil adhering to the chamber wall and stirring components; S23. Exhaust gas treatment: Volatile pollutant gases released from the soil after heating are extracted through the channel of the exhaust gas collection device and sent to an external purification system for treatment. S24. Discharge: After desorption is completed, stop heating, open the discharge port on the heat conduction plate, and discharge the repaired soil under the action of stirring. S3, chemical remediation mode, specifically includes: S31. Feeding and mixing: The soil to be remediated is fed into the remediation chamber through the unremediated soil feed inlet; the active power device is activated to drive the soil remediation mixing and crushing structure to rotate, thereby mixing and crushing the soil; S32. Spraying the pesticide: Start the spraying device, and the pesticide is pumped out from the pesticide tank through the spraying pump and sprayed into the soil being stirred through the connecting spraying structure and the spray bar to achieve uniform mixing and reaction of the pesticide and the soil. S33. Discharge: After the reaction is complete, open the discharge port to discharge the soil; S4, Composite Repair Mode, specifically includes: S41. Perform steps S to S to complete the thermal desorption remediation of organic pollutants. S42. Cooling and Drainage: After thermal desorption is completed, the heating device is stopped; cooling water is introduced into the soil remediation mixing and crushing structure for rapid cooling; the cooling water enters the cooling water receiving pipe through the cooling water inlet pipe of the active power device and the rotatable sealing head, flows into the cavity formed by the water inlet / outlet separator and the partition plate in the intermediate support cylinder, and is then distributed to the cooling water inlet pipe of each cooling mixing plate B through the cooling water inlet connection port, enters and flows through the pipelines of the two side support pipes and the intermediate cooling mixing pipe, realizing indirect water cooling of the mixing components, thereby rapidly reducing the soil temperature in the chamber; after cooling is completed, the cooling water circulation is stopped and the cooling water in the pipeline is drained. S43. Chemical spraying and remediation: Keep the soil remediation mixing and breaking structure rotating and stirring, start the spraying device, and spray the heavy metal remediation agent into the cooled soil to carry out the mixing reaction; S44. Discharge: After the reaction is complete, open the discharge port to discharge the soil.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention integrates two functions, thermal desorption and chemical remediation, and can intelligently switch or combine remediation modes according to the specific type of soil pollutants (volatile / semi-volatile organic compounds, heavy metals or complex pollution). This integrated design avoids the investment in equipping different types of pollution with special equipment, significantly improves the versatility and operational efficiency of the equipment, and can meet the complex remediation needs of contaminated sites.

[0018] 2. This invention integrates soil mixing, mechanical crushing of soil clods, and internal cooling circulating water circuit into one unit through a mixing and crushing structure. It achieves powerful mixing, clod crushing, and inner wall scraping during rotation. Its built-in water circuit simultaneously completes efficient heat exchange or rapid cooling, thereby greatly improving the uniformity of heat conduction or agent mixing and shortening the repair cycle.

[0019] 3. In dealing with complex pollution, the device can quickly reduce the soil temperature in the chamber after thermal desorption through its built-in cooling system, creating conditions for subsequent chemical remediation and achieving seamless and rapid switching between different remediation processes, avoiding the long wait for natural cooling. At the same time, its cooling system adopts a specially designed rotatable sealing connection. Through a precise fit structure and high-performance sealing ring, a reliable leak-free dynamic seal is achieved between the stationary pipeline and the rotating parts, ensuring the stable delivery of cooling water and the reliability of thermal management functions during continuous operation of the equipment. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 A schematic diagram showing the interior of the repaired compartment; Figure 3 A schematic diagram of the repaired warehouse structure; Figure 4 Figure 3 AA section view; Figure 5 A schematic diagram of the repaired warehouse structure; Figure 6 This is a schematic diagram of the structure of the present invention; Figure 7 This is a schematic diagram of the intermediate support cylinder; Figure 8 for Figure 7 BB section view; Figure 9 Schematic diagram of the edge crushing tooth device; Figure 10 This is a schematic diagram of a soil mixing and scraping device; Figure 11 This is a schematic diagram of the stirring structure support; Figure 12 for Figure 11 Enlarged view of point A; Figure 13 This is a schematic diagram of the fixing point of the intermediate stirring rod; Figure 14 This is a schematic diagram of the heating element and heat conduction plate. Figure 15 This is a schematic diagram of an active power unit; Figure 16 This is a schematic cross-sectional view of the active power unit; Figure 17 This is a schematic diagram of a spraying device.

[0021] In the picture: 1. Repair the top cover; 2. The soil inlet was not repaired; 3. Exhaust gas collection device; 4. Spraying device; 41. Spraying pump; 42. Chemical tank; 43. Connecting structure for spraying; 44. Spray boom; 5. Base; 6. Repair the cargo compartment; 61. Soil remediation mixing and crushing structure; 611. Cooling mixing plate A; 612. Cooling stirring plate B; 6121. Support pipes on both sides; 6122. Central cooling stirring pipe; 6123. Cooling water inlet pipe; 613. Soil clod crushing device; 6131, Edge crushing tooth device; 61312, Mounting plate; 61313, Rotary mounting base; 61314, Crushing tooth rod; 61315, Connecting rod; 6132, Mixing and scraping device; 61321, Scraper body; 61322, Scraper teeth; 614. Stirring structure support; 6141. Circular fixing ring; 6142. Intermediate connecting rod; 6143, intermediate stirring rod fixing point; 61431, connecting piece; 61432, stirring tube fixing plate; 61433, intermediate fixing ring; 6144. Guide vane; 6145. Connecting and fixing plates for the two side support pipes; 6146. Fixing device for the middle connecting rod; 615. Intermediate support cylinder; 6151. Support pipe connection port; 6152. Cooling water inlet connection port; 6153. Support cylinder body; 6154. Inlet and outlet water separator plate; 6155. Partition plate; 62. Heating device; 621. Heating element; 622. Power connection of heating element; 63. Heat transfer plate; 631. Heat transfer plate body; 632. Discharge port; 64. Driven device; 65. Active power unit; 651. Cooling water inlet pipe; 652. Cooling water receiving pipe; 653. Rotatable sealing head. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example: Please see Figure 1-17The present invention provides the following technical solution: a soil remediation device and method for land space remediation, including a base 5, a remediation chamber 6 fixedly installed on the upper surface of the base 5, a remediation cover 1 fixedly installed on the upper surface of the remediation chamber 6, a spraying device 4 fixedly installed on the upper surface of the remediation cover 1, an unremediated soil inlet 2 fixedly installed on one side of the upper surface of the remediation cover 1, the unremediated soil inlet 2 penetrating the remediation cover 1 and connecting to the remediation chamber 6, and an exhaust gas collection device 3 fixedly installed on the upper surface of the remediation cover 1, the exhaust gas collection device 3 having a channel for passing flue gas on its lower side, the channel penetrating the remediation cover 1 and connecting to the internal space; The repair chamber 6 includes a driven device 64 and an active power device 65 fixedly connected to the two side walls. A soil remediation mixing and crushing structure 61 is fixedly installed between the driven device 64 and the active power device 65. A heat conduction plate 63 is also fixedly installed between the two side walls. A heating device 62 is fixedly installed on the outside of the heat conduction plate 63.

[0024] In this embodiment, the base 5 provides stable support for the entire device; the repair cover 1 and the repair chamber 6 are fixedly connected by flange bolts to form a sealed repair space; the unrepaired soil inlet 2 is used to add the soil to be treated, and it is welded and fixed to the repair cover 1 and passes through it; the exhaust gas collection device 3 is fixed to the repair cover 1 by bolts, and its channel is connected to the inside of the repair chamber 6, which is used to efficiently export pollutant vapor to the external treatment system during the thermal desorption process; the heating device 62 is fixed to the outside of the heat conduction plate 63 by clamps or brackets, and the heat is evenly and efficiently transferred to the inside space of the repair chamber 6 through the heat conduction plate 63 to provide a heat source for thermal desorption repair; the active power device 65 (such as a motor reducer) and the driven device 64 (such as a bearing seat) are respectively fixed to the two side walls of the repair chamber 6 by bolts, which together support and drive the soil remediation mixing and crushing structure 61 to rotate, so as to realize the mixing and crushing functions.

[0025] Specifically, the soil remediation mixing and crushing structure 61 includes an intermediate support cylinder 615 fixedly connected to the driven device 64 and the active power device 65. Several cooling mixing plates A611 and B612 are fixedly installed on the outside of the intermediate support cylinder 615. A mixing structure bracket 614 is fixedly installed on the outside of the several cooling mixing plates A611 and B612. Soil clod crushing devices 613 are fixedly installed on the several cooling mixing plates A611 and B612 respectively. Cooling stirring plate A611 and cooling stirring plate B612 are placed alternately.

[0026] In this embodiment, the intermediate support cylinder 615 serves as the core drive shaft, with its two ends connected by keys to the output shafts of the driven device 64 and the active power device 65, respectively, transmitting power to the entire mixing and crushing structure. The cooling mixing blades A611 and B612 are radially fixed to the outside of the intermediate support cylinder 615 by high-strength bolts. They are arranged alternately, forming a complex flow field during rotation, which generates a strong cutting, scattering, and mixing effect on the soil, breaking the stratification of temperature and material uniformity. The mixing structure bracket 614 is fixed to the outer edge of the cooling mixing blades A611 and B612 by bolts, which strengthens the overall rigidity, prevents deformation, and connects the mixing blades into one unit. The soil clod crushing device 613 is fixed to the mixing blades by bolts and rotates with them, specifically forcibly crushing large or sticky soil clods that may appear during the mixing process.

[0027] Specifically, the intermediate support cylinder 615 includes a support cylinder body 6153. The support cylinder body 6153 has several cooling water inlet connection ports 6152 and support pipe connection ports 6151 on its periphery. An inlet / outlet water separator plate 6154 and a partition plate 6155 are fixedly installed at one end inside the support cylinder body 6153. A cavity is provided between the inlet / outlet water separator plate 6154 and the partition plate 6155. The cavity corresponds to several cooling water inlet connection ports 6152. A cooling water receiving pipe 652 is fixedly installed through the inlet / outlet water separator plate 6154.

[0028] In this embodiment, the support cylinder body 6153 serves as the main load-bearing and force-transmitting component; the support pipe connection port 6151 is connected to the two side support pipes 6121 of the cooling stirring plate B612 through a flange seal, thereby achieving structural fixation and internal water circuit connection; the cooling water inlet connection port 6152 is connected to the cooling water inlet pipe 6123 through a quick connector; the inlet and outlet water separator plate 6154 and the partition plate 6155 are welded to the inner wall of the support cylinder body 6153, forming an annular distribution cavity between them; the cooling water receiving pipe 652 is welded to the center of the inlet and outlet water separator plate 6154; the cooling water flows in from the cooling water receiving pipe 652, first enters this distribution cavity, and then flows out evenly through each corresponding cooling water inlet connection port 6152, entering the pipeline system of each cooling stirring plate B612.

[0029] Specifically, the cooling mixing plate B612 includes two side support pipes 6121 fixedly connected to the support pipe connection port 6151. There are two side support pipes 6121, which are respectively fixedly installed on the support pipe connection ports 6151 on both sides of the support cylinder body 6153. Several intermediate cooling mixing pipes 6122 are fixedly installed between the two side support pipes 6121. An edge crushing tooth device 6131 and a mixing and scraping device 6132 are fixedly installed on one side of the several intermediate cooling mixing pipes 6122. The two side support pipes 6121 are connected to the several intermediate cooling mixing pipes 6122. One of the intermediate cooling mixing pipes 6122 is also fixedly connected to a cooling water inlet pipe 6123. The cooling water inlet pipe 6123 is also fixedly connected to the cooling water inlet connection port 6152.

[0030] In this embodiment, the two side support pipes 6121 are fixed to the support pipe connection port 6151 of the middle support cylinder 615 through flanges, forming the main load-bearing frame of the cooling mixing plate B612 and the main cooling water circuit pipeline; several intermediate cooling mixing pipes 6122 are welded between the two support pipes. They are both mixing components and branch pipelines for cooling water circulation, increasing the heat exchange area; cooling water is injected from the distribution cavity of the middle support cylinder 615 through a cooling water inlet connection port 6152 and the cooling water inlet pipe 6123 connected thereto into a designated intermediate cooling mixing pipe 6122, and then diverted to circulate in the entire pipeline network connected by the two side support pipes 6121 and all intermediate cooling mixing pipes 6122, and finally flows back from the other side; this structure can quickly cool the internal soil when needed (such as when switching the composite remediation mode); the edge crushing tooth device 6131 and the mixing scraping device 6132 installed on the pipeline can crush clumps and scrape off the materials adhering to the wall.

[0031] Specifically, the edge crushing tooth device 6131 includes a mounting plate 61311 fixedly connected to the intermediate cooling stirring pipe 6122. A plurality of rotating mounting seats 61312 are fixedly mounted on one side of the mounting plate 61311. A connecting rod 61314 is fixedly mounted on the upper end face of one of the rotating mounting seats 61312. A crushing tooth rod 61313 is fixedly mounted on the other end of the connecting rod 61314. The mixing and scraping device 6132 includes a scraping blade body 61321 fixedly connected to the intermediate cooling mixing pipe 6122, and a plurality of scraping teeth 61322 are provided on the scraping blade body 61321.

[0032] In this embodiment, the mounting plate 61311 of the edge crushing tooth device 6131 is bolted to the intermediate cooling mixing pipe 6122; the rotating mounting base 61312 is fixed to the mounting plate 61311 by welding, so that the crushing tooth rod 61313 connected to it by bolts can swing within a certain range; when the mixing structure rotates, the crushing tooth rod 61313 can adaptively adjust its angle under the action of centrifugal force and resistance with the soil, hammering and tearing large pieces or hard soil at the edges, with strong crushing effect and buffering impact force to protect the main structure; the scraper plate body 61321 of the mixing scraper device 6132 is also bolted to the intermediate cooling mixing pipe 6122; the scraper teeth 61322 on it are usually wear-resistant alloy steel strips; during the rotation process, the scraper teeth 61322 can effectively scrape off the soil adhering to the inner wall of the repair chamber 6, the surface of the heat conduction plate 63 and other mixing components.

[0033] Specifically, the stirring structure support 614 includes two circular fixing rings 6141 installed on the outside of the cooling stirring plate A611 and the cooling stirring plate B612. A plurality of intermediate connecting rods 6142 are fixedly installed between the two circular fixing rings 6141. Two intermediate stirring rod fixing points 6143 are fixedly installed inside the plurality of intermediate connecting rods 6142. A guide plate 6144 is fixedly installed on the outside of the plurality of intermediate stirring rod fixing points 6143. A two-sided support pipe connecting fixing plate 6145 is fixedly installed at one side of the circular fixing ring 6141. A plurality of intermediate connecting rod fixing devices 6146 are fixedly installed on the outer side of the circular fixing ring 6141. The intermediate connecting rod fixing devices 6146 are fixedly connected to the intermediate connecting rods 6142. The intermediate stirring rod fixing point 6143 includes an intermediate fixing ring 61433 sleeved on the outer side of the support cylinder body 6153. Several stirring tube fixing plates 61432 are fixedly installed on the outer side of the intermediate fixing ring 61433. A connecting piece 61431 is fixedly installed on the end of any stirring tube fixing plate 61432 away from the intermediate fixing ring 61433.

[0034] In this embodiment, two circular fixing rings 6141 are bolted around the cooling stirring plates A611 and B612, tightly connecting them into one unit. This greatly enhances the radial rigidity and stability of the entire rotating assembly, preventing deformation due to centrifugal force during high-speed rotation. The two ends of the intermediate connecting rod 6142 are fixed between the two circular fixing rings 6141, forming a truss support. The intermediate connecting rod fixing device 6146 is welded to the circular fixing rings 6141, fixing the intermediate connecting rod 6142. Side supports... The pipe connection fixing plate 6145 is welded to the circular fixing ring 6141 on one side and is connected to the two side support pipes 6121 of the cooling stirring plate B612 by bolts, providing additional reinforcement; the middle stirring rod fixing point 6143 is sleeved on the middle support cylinder 615 through its middle fixing ring 61433, and is connected to the radially extending stirring pipe fixing plate 61432 and the end connecting piece 61431; the guide plate 6144 is welded to the outside of the middle stirring rod fixing point 6143, which can guide the material flow direction and optimize the mixing efficiency.

[0035] Specifically, the heat conduction plate 63 includes a heat conduction plate body 631, and a discharge port 632 is fixedly installed on one side of the heat conduction plate body 631; a heating tube 621 is fixedly installed on the outer side of the heat conduction plate body 631, and the heating tube 621 is fixedly connected to the power supply connection point 622 of the heating tube.

[0036] In this embodiment, the heat conduction plate body 631 is made of stainless steel plate with good thermal conductivity. It is fixed between the two side walls of the repair chamber 6 by bolts, forming the lower half of the inner wall and bottom of the repair chamber. Heating tubes 621 are closely arranged and fixed on its outer side. The power connection 622 of the heating tube is a waterproof electrical connector, fixed on the outer wall of the repair chamber 6, and used to supply power to all heating tubes 621. This design allows the heat of the heating tubes 621 to be efficiently and evenly conducted to the heat conduction plate body 631, and then radiated and convected to the soil in the chamber by its inner surface. The discharge port 632 is welded to the lower side of the heat conduction plate body 631 and is equipped with a manual gate. After the repair is completed, the gate can be opened to discharge the repaired soil with the help of the stirring component.

[0037] Specifically, a rotatable sealing head 653 is fixedly installed at one end of the cooling water receiving pipe 652, and a cooling water inlet pipe 651 is connected to one end of the rotatable sealing head 653. A thin-walled structure is provided at one end of the cooling water inlet pipe 651, and a groove corresponding to the thin-walled structure is provided at one end of the rotatable sealing head 653. The thin-walled feature and the groove allow the device to be connected while rotating.

[0038] In this embodiment, the cooling water receiving pipe 652 rotates together with the intermediate support cylinder 615; the rotatable sealing head 653 is fixed to the stationary end of the cooling water receiving pipe 652; its core function is to establish a sealed, relatively rotatable connection channel between the stationary external cooling water inlet pipe 651 and the rotating internal cooling water receiving pipe 652; the thin-walled structure (which can be regarded as a journal) at the end of the cooling water inlet pipe 651 is inserted into the corresponding groove (equivalent to a bushing) of the rotatable sealing head 653, and a high-performance sealing ring is installed between the two; this connection method allows the cooling water inlet pipe 651 to remain stationary, while the cooling water receiving pipe 652 rotates with the equipment, and the cooling water can flow continuously and leak-free from the external pipeline.

[0039] Specifically, the spraying device 4 includes a pesticide tank 42, a pesticide pump 41 connected to the pesticide tank 42 by a pipe, a connecting spraying structure 43 connected to the pesticide pump 41 by a pipe, and a spray bar 44 fixedly installed on the lower end face of the connecting spraying structure 43.

[0040] In this embodiment, the agent tank 42 is used to store liquid remediation agent and is fixed to the remediation cover 1 by a bracket; the spray pump 41 is a metering pump and is fixed to the bracket of the remediation cover 1 by bolts. Its inlet is connected to the bottom of the agent tank 42 through a pipe, and its outlet is connected to the connecting spray structure 43 that extends into the remediation chamber through a pipe; the connecting spray structure 43 is made of corrosion-resistant material and is fixed to the inner side of the remediation cover 1 by bolts; the spray bar 44 is connected to the bottom of the connecting spray structure 43 by bolts, and nineteen atomizing nozzles are arranged in its length and direction; when the chemical remediation or composite remediation agent spraying step is performed, the spray pump 41 is started, the agent is accurately metered and pumped to the connecting spray structure 43, and after being atomized by the nozzles on the spray bar 44, it is evenly sprayed into the soil that is being stirred and rolled, ensuring that the agent and soil particles fully contact and react.

[0041] A soil remediation method for land space management includes the following steps: S1. Pollution Identification and Mode Selection: Analyze the pollution type of the soil to be remediated; if the main pollutant is volatile or semi-volatile organic compounds, initiate the thermal desorption remediation mode; if the main pollutant is heavy metals, initiate the chemical remediation mode; if the pollutants contain both organic matter and heavy metals, initiate the combined remediation mode. S2, thermal desorption repair mode, specifically includes: S21. Feeding and sealing: The soil to be repaired is fed into the repair chamber 6 through the unrepaired soil inlet 2, and the unrepaired soil inlet 2 and outlet 632 are closed to form a sealed space. S22, Heating and Stirring Desorption: The heating device 62 is activated, and heat is transferred to the interior of the remediation chamber 6 through the heat conduction plate 63; at the same time, the active power device 65 is driven to rotate the soil remediation stirring and crushing structure 61 as a whole; the cooling stirring plate A611 and the cooling stirring plate B612 stir, turn and mix the soil; during the stirring process, the soil clod crushing device 613 installed on it mechanically crushes the adhering soil clods, of which the edge crushing tooth device 6131 impacts and crushes large soil clods, and the scraping teeth 61322 of the stirring scraping device 6132 scrapes and refines the soil adhering to the chamber wall and stirring components; S23. Exhaust gas treatment: Volatile pollutant gases released from the soil after heating are extracted through the channel of exhaust gas collection device 3 and sent to an external purification system for treatment. S24. Discharge: After desorption is completed, stop heating, open the discharge port 632 on the heat conduction plate 63, and discharge the repaired soil under the action of stirring. S3, chemical remediation mode, specifically includes: S31. Feeding and mixing: The soil to be remediated is fed into the remediation chamber 6 through the unremediated soil feed inlet 2; the active power unit 65 is started to drive the soil remediation mixing and crushing structure 61 to rotate, so as to mix and crush the soil. S32, pesticide spraying: Start the spraying device 4, the pesticide is pumped out from the pesticide tank 42 through the spraying pump 41, and sprayed into the soil being stirred through the spraying structure 43 and the spraying rod 44 to achieve uniform mixing and reaction of the pesticide and the soil. S33, Discharge: After the reaction is complete, open the discharge port 632 to discharge the soil; S4, Composite Repair Mode, specifically includes: S41. Perform steps S21 to S23 to complete the thermal desorption remediation of organic pollutants; S42. Cooling and Drainage: After thermal desorption is completed, the heating device 62 is stopped; cooling water is introduced into the soil remediation mixing and crushing structure 61 for rapid cooling; the cooling water enters the cooling water receiving pipe 652 through the cooling water inlet pipe 651 of the active power device 65 and the rotatable sealing head 653, flows into the cavity formed by the water inlet / outlet separator plate 6154 and the partition plate 6155 in the intermediate support cylinder 615, and then is distributed to the cooling water inlet pipe 6123 of each cooling mixing plate B612 through the cooling water inlet connection port 6152, enters and flows through the pipelines of the two side support pipes 6121 and the intermediate cooling mixing pipe 6122, realizing indirect water cooling of the mixing components, thereby rapidly reducing the soil temperature in the chamber; after cooling is completed, the cooling water circulation is stopped and the cooling water in the pipeline is drained. S43, Chemical spraying and remediation: Keep the soil remediation mixing and breaking structure 61 rotating and stirring, start the spraying device 4, and spray the remediation agent targeting heavy metals into the cooled soil to carry out the mixing reaction; S44. Discharge: After the reaction is complete, open the discharge port 632 to discharge the soil.

[0042] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A soil remediation device and method for land space remediation, comprising a base (5), wherein a remediation chamber (6) is fixedly installed on the upper surface of the base (5), and a remediation cover (1) is fixedly installed on the upper surface of the remediation chamber (6), characterized in that: A spraying device (4) is also fixedly installed on the upper surface of the repair cover (1). An unrepaired soil inlet (2) is also fixedly installed on one side of the upper surface of the repair cover (1). The unrepaired soil inlet (2) passes through the repair cover (1) and connects to the repair chamber (6). A tail gas collection device (3) is also fixedly installed on the upper surface of the repair cover (1). A channel for passing flue gas is provided on the lower side of the tail gas collection device (3). The channel passes through the repair cover (1) and connects to the internal space. The repair chamber (6) includes a driven device (64) and an active power device (65) fixedly connected to the two side walls. A soil remediation mixing and crushing structure (61) is fixedly installed between the driven device (64) and the active power device (65). A heat conduction plate (63) is also fixedly installed between the two side walls. A heating device (62) is fixedly installed on the outside of the heat conduction plate (63).

2. The soil remediation device and method for land space management according to claim 1, characterized in that: The soil remediation mixing and crushing structure (61) includes an intermediate support cylinder (615) fixedly connected to a driven device (64) and an active power device (65). A plurality of cooling mixing plates A (611) and cooling mixing plates B (612) are fixedly installed on the outside of the intermediate support cylinder (615). A mixing structure bracket (614) is fixedly installed on the outside of the plurality of cooling mixing plates A (611) and cooling mixing plates B (612). A soil clod crushing device (613) is fixedly installed on the plurality of cooling mixing plates A (611) and cooling mixing plates B (612). The cooling stirring plate A (611) and the cooling stirring plate B (612) are placed alternately.

3. The soil remediation device and method for land space management according to claim 2, characterized in that: The intermediate support cylinder (615) includes a support cylinder body (6153). The support cylinder body (6153) has a plurality of cooling water inlet connection ports (6152) and support pipe connection ports (6151) arranged around its periphery. An inlet and outlet water separator plate (6154) and a partition plate (6155) are fixedly installed at one end inside the support cylinder body (6153). A cavity is provided between the inlet and outlet water separator plate (6154) and the partition plate (6155). The cavity corresponds to a plurality of cooling water inlet connection ports (6152). A cooling water receiving pipe (652) is fixedly installed through the inlet and outlet water separator plate (6154).

4. The soil remediation device and method for land space management according to claim 2, characterized in that: The cooling stirring plate B (612) includes two side support pipes (6121) fixedly connected to the support pipe connection port (6151). There are two side support pipes (6121). The two side support pipes (6121) are respectively fixedly installed on the support pipe connection ports (6151) on both sides of the support cylinder body (6153). A plurality of intermediate cooling stirring pipes (6122) are fixedly installed between the two side support pipes (6121). An edge crushing tooth device (6131) and a stirring scraper device (6132) are fixedly installed on one side of the plurality of intermediate cooling stirring pipes (6122). The two side support pipes (6121) are connected to the plurality of intermediate cooling stirring pipes (6122). One of the intermediate cooling stirring pipes (6122) is also fixedly connected to a cooling water inlet pipe (6123). The cooling water inlet pipe (6123) is also fixedly connected to the cooling water inlet connection port (6152).

5. The soil remediation device and method for land and space remediation according to claim 4, characterized in that: The edge crushing tooth device (6131) includes a mounting plate (61311) fixedly connected to the intermediate cooling stirring tube (6122). A plurality of rotating mounting seats (61312) are fixedly mounted on one side of the mounting plate (61311). A connecting rod (61314) is fixedly mounted on the upper end face of one of the rotating mounting seats (61312). A crushing tooth rod (61313) is fixedly mounted on the other end of the connecting rod (61314). The mixing and scraping device (6132) includes a scraping blade body (61321) fixedly connected to the intermediate cooling mixing pipe (6122), and the scraping blade body (61321) is provided with a plurality of scraping teeth (61322).

6. The soil remediation device and method for land space management according to claim 2, characterized in that: The stirring structure support (614) includes two circular fixing rings (6141) installed on the outside of the cooling stirring plate A (611) and the cooling stirring plate B (612). A plurality of intermediate connecting rods (6142) are fixedly installed between the two circular fixing rings (6141). Two intermediate stirring rod fixing points (6143) are fixedly installed inside the plurality of intermediate connecting rods (6142). A guide plate (6144) is fixedly installed on the outside of the plurality of intermediate stirring rod fixing points (6143). A two-sided support pipe connecting fixing plate (6145) is fixedly installed at one side of the circular fixing ring (6141). A plurality of intermediate connecting rod fixing devices (6146) are fixedly installed on the outer side of the circular fixing ring (6141). The intermediate connecting rod fixing devices (6146) are fixedly connected to the intermediate connecting rods (6142). The intermediate stirring rod fixing point (6143) includes an intermediate fixing ring (61433) sleeved on the outer side of the support cylinder body (6153). A plurality of stirring tube fixing plates (61432) are fixedly installed on the outer side of the intermediate fixing ring (61433). A connecting piece (61431) is fixedly installed on the end of any stirring tube fixing plate (61432) away from the intermediate fixing ring (61433).

7. The soil remediation device and method for land space management according to claim 1, characterized in that: The heat conduction plate (63) includes a heat conduction plate body (631), and a discharge port (632) is fixedly installed on one side of the heat conduction plate body (631); a heating tube (621) is fixedly installed on the outer side of the heat conduction plate body (631), and the heating tube (621) is fixedly connected to the power supply connection point (622).

8. The soil remediation device and method for land space management according to claim 3, characterized in that: One end of the cooling water receiving pipe (652) is fixedly installed with a rotatable sealing head (653), and one end of the rotatable sealing head (653) is connected to a cooling water inlet pipe (651). One end of the cooling water inlet pipe (651) is provided with a thin-walled structure, and one end of the rotatable sealing head (653) is provided with a groove corresponding to the thin-walled structure. The thin-walled feature and the groove allow the device to be connected while rotating.

9. The soil remediation device and method for land space management according to claim 1, characterized in that: The spraying device (4) includes a medicine tank (42), the medicine tank (42) is connected to a spraying pump (41) by a pipe, the spraying pump (41) is connected to a connecting spraying structure (43) by a pipe, and a spray bar (44) is fixedly installed on the lower end face of the connecting spraying structure (43).

10. A soil remediation method for land and space remediation, based on the soil remediation device according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Pollution Identification and Mode Selection: Analyze the pollution type of the soil to be remediated; if the main pollutant is volatile or semi-volatile organic compounds, initiate the thermal desorption remediation mode; if the main pollutant is heavy metals, initiate the chemical remediation mode. If the pollutants contain both organic matter and heavy metals, then a combined remediation mode will be activated. S2, thermal desorption repair mode, specifically includes: S21, Feeding and Sealing: The soil to be repaired is fed into the repair chamber (6) through the unrepaired soil inlet (2), and the unrepaired soil inlet (2) and outlet (632) are closed to form a sealed space; S22, Heating and Stirring Desorption: The heating device (62) is activated, and heat is transferred to the interior of the repair chamber (6) through the heat conduction plate (63); at the same time, the active power device (65) is driven to rotate the soil repair stirring and crushing structure (61) as a whole; the cooling stirring plate A (611) and the cooling stirring plate B (612) stir, turn and mix the soil; during the stirring process, the soil clod crushing device (613) installed on it mechanically crushes the adhering soil clods, wherein the edge crushing tooth device (6131) impacts and crushes large soil clods, and the scraping teeth (61322) of the stirring scraping device (6132) scrapes and refines the soil adhering to the chamber wall and stirring components; S23, exhaust gas treatment: The volatile pollutant gases released after the soil is heated are extracted through the channel of the exhaust gas collection device (3) and sent to the external purification system for treatment. S24. Discharge: After desorption is completed, stop heating and open the discharge port (632) on the heat conduction plate (63) to discharge the repaired soil under the action of stirring. S3, chemical remediation mode, specifically includes: S31. Feeding and mixing: The soil to be repaired is fed into the repair chamber (6) through the unrepaired soil feed port (2); the active power device (65) is started to drive the soil repair mixing and crushing structure (61) to rotate, and the soil is mixed and crushed. S32, spraying of pesticide: start the spraying device (4), the pesticide is pumped out from the pesticide tank (42) through the spraying pump (41), and sprayed into the soil being stirred through the connecting spraying structure (43) and the spray bar (44) to achieve uniform mixing and reaction of pesticide and soil; S33, Discharge: After the reaction is complete, open the discharge port (632) to discharge the soil; S4, Composite Repair Mode, specifically includes: S41. Perform steps S21 to S23 to complete the thermal desorption remediation of organic pollutants; S42, Cooling and Drainage: After thermal desorption is completed, the heating device (62) is stopped; cooling water is introduced into the soil remediation mixing and crushing structure (61) for rapid cooling; the cooling water enters the cooling water receiving pipe (652) through the cooling water inlet pipe (651) and the rotatable sealing head (653) of the active power device (65), flows into the cavity formed by the water inlet and outlet partition plate (6154) and the partition plate (6155) in the intermediate support cylinder (615), and then is distributed to the cooling water inlet pipe (6123) of each cooling mixing plate B (612) through the cooling water inlet connection port (6152), enters and flows through the pipelines of the two side support pipes (6121) and the middle cooling mixing pipe (6122), realizes indirect water cooling of the mixing components, thereby rapidly reducing the soil temperature in the chamber; after cooling is completed, the cooling water circulation is stopped and the cooling water in the pipeline is drained; S43, Chemical spraying and remediation: Keep the soil remediation mixing and breaking structure (61) rotating and stirring, start the spraying device (4), spray the remediation agent for heavy metals into the cooled soil, and carry out the mixing reaction; S44. Discharge: After the reaction is complete, open the discharge port (632) to discharge the soil.

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