A complete organic contaminated soil remediation and improvement equipment

Abstract

The present application belongs to the technical field of soil treatment, and particularly relates to a complete organic contaminated soil remediation and improvement equipment. The technical scheme is as follows: a complete organic contaminated soil remediation and improvement equipment, comprising a soil pollution pretreatment device, the soil pollution pretreatment device being connected with a soil pollution pyrolysis treatment device through a pipeline, the soil pollution pyrolysis treatment device being connected with a soil improvement treatment device, a tail gas treatment device and an eluent treatment device respectively, and the soil improvement treatment device being connected with a soil depth treatment device. The present application provides a complete organic contaminated soil remediation and improvement equipment which is high in efficiency, low in cost and capable of reducing secondary pollution.

Description

Technical Field

[0001] This invention belongs to the field of soil treatment technology, and specifically relates to a complete set of equipment for the remediation and improvement of organically polluted soil. Background Technology

[0002] Organic pollutants enter the soil through leakage, seepage, and other means, causing environmental pollution. These organic substances may be toxic, carcinogenic, or persistent, posing a threat to ecosystems and human health. The treatment of contaminated sludge is an important issue in the field of environmental protection, directly affecting water bodies, soil, and the surrounding ecological environment.

[0003] Currently, the main methods for remediating soil pollution include physical, chemical, and biological remediation technologies. However, these traditional remediation methods have the following major problems:

[0004] First, it is inefficient: traditional methods usually take a long time to significantly reduce the concentration of soil pollutants, which is difficult to meet the urgent needs in practical applications.

[0005] Second, high cost: Many repair methods require expensive equipment and reagents, resulting in high overall repair costs and limiting large-scale application.

[0006] Third, secondary pollution: Some methods may generate secondary pollution during the remediation process, such as chemical reagent residues or substandard discharge of treated wastewater, which further pollutes the environment.

[0007] Therefore, there is an urgent need for an efficient, environmentally friendly, and cost-effective method to remediate contaminated soil into high-quality planting soil, capable of addressing various types of organic and inorganic pollutants and reducing the risk of secondary pollution. Summary of the Invention

[0008] In order to solve the above-mentioned problems in the existing technology, the purpose of this invention is to provide a complete set of organic polluted soil remediation and improvement equipment that is highly efficient, low-cost and reduces secondary pollution.

[0009] The technical solution adopted in this invention is as follows:

[0010] A complete set of organic polluted soil remediation and improvement equipment includes a soil pollution pretreatment device, a soil pollution pyrolysis treatment device connected to the soil pollution pretreatment device via pipeline, a soil improvement treatment device, an exhaust gas treatment device and an eluent treatment device connected to the soil improvement treatment device, and a soil deep treatment device connected to the soil improvement treatment device.

[0011] Contaminated soil is sent to a soil pollution pretreatment unit for pretreatment. The pretreated soil is then sent to a soil pollution pyrolysis unit for pyrolysis. The pyrolyzed soil is then sent to a soil amendment unit for amendment treatment. The amended soil is then sent to a deep soil treatment unit for negative pressure deep treatment, after which the soil can be discharged. The eluent from pyrolysis is sent to an eluent treatment unit for further treatment, and then either stored or discharged. The exhaust gas from pyrolysis is sent to a tail gas treatment unit for further treatment, and the treated exhaust gas is then discharged.

[0012] The soil remediation and improvement equipment of this invention can perform soil pretreatment and pyrolysis treatment, and improve and deeply treat the pyrolyzed soil. It also separately treats the eluent and waste gas from pyrolysis, ensuring that the gas, liquid, and solid components after pyrolysis are fully treated. This complete set of organic polluted soil remediation and improvement equipment can improve soil treatment efficiency, reduce operating costs, and minimize secondary pollution, possessing significant application value and broad application prospects.

[0013] As a preferred embodiment of the present invention, the soil pollution pretreatment device includes, from top to bottom, a waste soil inlet, a waste downward extrusion chamber, a soil downward extrusion chamber, and a waste soil outlet. The outlet is connected to the soil pollution pyrolysis treatment device through a soil eccentric reducer. An arched waste grid is connected to the top of the soil downward extrusion chamber. An isolation cylinder is connected inside the soil downward extrusion chamber. A lifting and stirring device is installed in the isolation cylinder. A liquid pipeline for spraying washing liquid and mixing liquid extends into the lower part of the isolation cylinder. A microbubble liquid injection device is connected to the lower part of the lifting and stirring device.

[0014] The arched waste grid blocks waste in the soil, allowing only soil to pass through. The waste slides along the arched grid to the inner wall of the downward squeezing chamber. The waste is then squeezed downwards within the chamber and discharged from the device, preventing it from affecting subsequent soil treatment.

[0015] The soil compression chamber compresses the soil downwards, while a portion of the soil reaching the bottom of the compression chamber is lifted by a mixing device into an isolation cylinder, and then discharged back into the upper part of the compression chamber from the top of the isolation cylinder. The mixing device also agitates the soil during the lifting process, thus achieving partial soil circulation and agitation.

[0016] A liquid pipeline extending from the lower part of the isolation cylinder contains a spray pipe for adding leaching and mixing liquids to the soil. A microbubble liquid injection device is connected to the lower part of the lifting and stirring device to spray microbubble liquid into the soil. Because some soil circulates and is thoroughly agitated between the soil downward extrusion chamber and the isolation cylinder, the leaching and mixing liquids are fully mixed with the soil, as are the microbubble liquids. This ensures thorough pretreatment of the soil within the device, improving the treatment efficiency of the soil before it enters the next process.

[0017] In a preferred embodiment of the present invention, the leachate comprises a surfactant, a chelating agent, a pH adjuster, and a biosurfactant; the mass concentration of the surfactant is 0.5–1.5%, the mass concentration of the chelating agent is 0.3–0.8%, the pH of the pH adjuster is 7–8, and the mass concentration of the biosurfactant is 0.1–0.3%; the temperature of the leachate is 30–35°C. By rationally configuring the leachate and controlling its temperature, the soil is adequately and effectively pretreated.

[0018] As a preferred embodiment of the present invention, the soil pollution pyrolysis treatment device includes a pyrolysis tank, a soil conveying pump connected to the bottom of the pyrolysis tank, the soil conveying pump being connected to the soil pollution pretreatment device via a soil eccentric reducer, a spiral stirrer and a heating rod installed inside the pyrolysis tank, a liquid collection section connected to the top of the pyrolysis tank, the top of the liquid collection section being connected to a tail gas treatment device via an exhaust pipe, a feeding conveyor belt connected to the upper part of the pyrolysis tank, the other end of the feeding conveyor belt being connected to the soil improvement treatment device, and the eluent discharge pipe of the liquid collection section being connected to the eluent treatment device.

[0019] Pretreated soil is pumped from the bottom into a pyrolysis tank by a soil conveying pump. Heating rods in the pyrolysis tank heat the soil, and a spiral agitator thoroughly mixes it, ensuring complete separation of waste gas and eluent from the contaminated soil. The settled soil in the pyrolysis tank is output via a conveyor belt, the filtered eluent is discharged through an eluent discharge pipe, and the rising waste gas is discharged through an waste gas discharge pipe. This invention effectively and thoroughly separates waste gas and eluent from pretreated contaminated soil, facilitating subsequent separate treatment of the soil, waste gas, and eluent.

[0020] As a preferred embodiment of the present invention, the spiral stirrer is connected to the positive terminal of an external power supply, and the spiral stirrer is coated with an anode material; the anode material is one of ruthenium oxide or iridium oxide layer made of titanium-based material, boron-doped diamond, lead dioxide, SnO2 and Ti / SnO2.

[0021] As a preferred embodiment of the present invention, the soil improvement treatment device includes a soil improvement processor, which is equipped with an improvement and stirring mechanism. The soil improvement processor is connected to a soil pollution pyrolysis treatment device via a feeding conveyor belt. The deep soil treatment device includes a negative pressure reactor, which is equipped with a reaction and stirring mechanism. The soil improvement processor is connected to an improved soil discharge pipe for feeding the improved soil into the negative pressure reactor. The negative pressure reactor is connected to a negative pressure tank via a pipe, and the negative pressure tank is connected to a negative pressure machine via a pipe. Organic matter, inorganic materials, regulators, nitrogen, phosphorus, and potassium fertilizers and trace element fertilizers are added to the feeding conveyor belt.

[0022] Various soil amendments can be added to the soil amendment processor, and the mixture is thoroughly stirred by an amendment mixing mechanism to ensure complete soil amendment. The amended soil is then discharged into a negative pressure reactor through an amended soil discharge pipe for negative pressure reaction. After the negative pressure reaction, beneficial microbial agents are added to the negative pressure reactor, resulting in deep soil treatment. The soil after amendment and deep negative pressure treatment meets discharge standards.

[0023] As a preferred embodiment of the present invention, the deep soil treatment device further includes a cover-opening mechanism for opening and closing the cover of the negative pressure reactor; the cover-opening mechanism includes a lifting frame, on which a lifting motor is mounted, and a U-shaped clamp for connecting the cover of the negative pressure reactor is connected to the lifting motor; one side of the cover of the negative pressure reactor is hinged to the main body of the negative pressure reactor, and the other side of the cover of the negative pressure reactor is fixed with a lifting handle that cooperates with the U-shaped clamp and a fixed connector that is detachably connected to the main body of the negative pressure reactor. After the lifting motor pulls the cover of the negative pressure reactor, the cover flips and opens, at which time soil can be added to the negative pressure reactor. After the soil is added, the cover is reliably sealed to the main body of the negative pressure reactor through the fixed connector, ensuring a negative pressure environment.

[0024] As a preferred embodiment of the present invention, the eluent treatment device includes a mixer, a spiral contact reactor, and a water storage tank. The mixer is connected to the soil pollution pyrolysis treatment device through an eluent discharge pipe. The mixer is connected to the lower part of the spiral contact reactor through a pipe. The inner surface of the spiral contact reactor is loaded with active material. The upper part of the spiral contact reactor is connected to the water storage tank.

[0025] The inner surface of the spiral contact reactor is loaded with active material. After entering the reactor, the eluent rises slowly along the internal spiral, ensuring thorough contact between the active material and the eluent, thus achieving complete treatment of the eluent. The treated eluent is then discharged from the top of the spiral contact reactor into a storage tank.

[0026] As a preferred embodiment of the present invention, the present invention further includes a synthesis apparatus; the synthesis apparatus includes a synthesis support, a reactor body is fixed inside the synthesis support, a spiral contact reactor is placed inside the reactor body, a synthesis power motor is installed on the synthesis support, the output end of the synthesis power motor is connected to the central column of the spiral contact reactor, and an active material slurry is added inside the reactor body.

[0027] During the process of the synthetic power motor driving the spiral contact reactor to rotate, the active material slurry comes into full contact with the spiral contact reactor, so that the active material can adhere to the surface of the spiral contact reactor.

[0028] As a preferred embodiment of the present invention, the exhaust gas treatment device includes an exhaust gas treatment tank, and a plurality of contactors are arranged inside the exhaust gas treatment tank. The plurality of contactors divide the interior of the exhaust gas treatment tank into a plurality of waste gas reaction chambers, which are filled with water. The surfaces of the contactors are coated with photocatalytic materials and contact catalytic materials. An exhaust gas discharge pipe is connected to the bottom of the exhaust gas treatment tank, and the soil pollution pyrolysis treatment device is connected to the exhaust gas discharge pipe through the exhaust gas discharge pipe.

[0029] The contactor surface is coated with photocatalytic material and contact catalytic material. After the exhaust gas enters the tail gas treatment tank through the exhaust gas inlet pipe, it comes into full contact with the photocatalytic material and contact catalytic material, so that the tail gas can undergo a full catalytic reaction and the treated tail gas meets the emission standards.

[0030] The beneficial effects of this invention are as follows:

[0031] The soil remediation and improvement equipment of this invention can perform soil pretreatment and pyrolysis treatment, and improve and deeply treat the pyrolyzed soil. It also separately treats the eluent and waste gas from pyrolysis, ensuring that the gas, liquid, and solid components after pyrolysis are fully treated. This complete set of organic polluted soil remediation and improvement equipment can improve soil treatment efficiency, reduce operating costs, and minimize secondary pollution, possessing significant application value and broad application prospects. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure in the first direction of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure in the second direction of the present invention;

[0034] Figure 3 This is a schematic diagram of a soil pollution pretreatment device;

[0035] Figure 4 This is a cross-sectional view of the soil pollution pretreatment device in the first direction;

[0036] Figure 5 This is a cross-sectional view of the soil pollution pretreatment device in the second direction;

[0037] Figure 6 This is a schematic diagram of a soil pollution pyrolysis treatment device;

[0038] Figure 7 This is a cross-sectional view of a soil pollution pyrolysis treatment device;

[0039] Figure 8 This is a schematic diagram of the soil treatment device;

[0040] Figure 9 This is a schematic diagram of the soil improvement and treatment device;

[0041] Figure 10 This is a schematic diagram of the soil deep treatment device in the first direction.

[0042] Figure 11 This is a schematic diagram of the second direction of the soil deep treatment device;

[0043] Figure 12 This is a cross-sectional view of a negative pressure reactor;

[0044] Figure 13 This is a schematic diagram of the eluent treatment device;

[0045] Figure 14 This is a schematic diagram of the structure of a spiral contact reactor;

[0046] Figure 15 It is an assembly diagram of the synthesis unit and the spiral contact reactor;

[0047] Figure 16 This is a schematic diagram of the exhaust gas treatment device;

[0048] Figure 17 This is a cross-sectional structural diagram of the exhaust gas treatment device.

[0049] In the diagram: 1-Soil pollution pretreatment device; 2-Soil pollution pyrolysis treatment device; 3-Soil treatment device; 4-Effect gas treatment device; 5-Eluent treatment device;

[0050] 11-Inlet for waste soil; 12-Downward extrusion chamber for waste; 13-Downward extrusion chamber for soil; 14-Outlet for waste soil; 15-Waste grid; 16-Isolation cylinder; 17-Lifting and mixing device; 18-Liquid pipeline; 19-Microbubble liquid injection device; 111-Feed hopper; 112-Neck section; 121-Waste step plate; 122-Waste discharge pipeline; 123-Upper spiral for downward extrusion of waste; 124-Lower spiral for downward extrusion of waste; 131-Downward extrusion spiral for soil; 151-Vibrator; 152-Flexible connection device; 161-French-shaped circulation opening; 162-Slurry outlet; 163-Fixed frame; 171-Drive wheel; 172-Lifting and mixing power device; 191-Divider plate; 192-Microbubble liquid inlet pipeline; 193-Microbubble liquid nozzle;

[0051] 21-Pyrolysis tank; 22-Soil transfer pump; 23-Spiral agitator; 24-Heating rod; 25-Liquid collection section; 26-Waste gas discharge pipe; 27-Feeding conveyor belt; 28-Eluent discharge pipe; 29-Soil eccentric reducer; 211-Filter interceptor; 261-Downward bend section; 262-Tightening section; 263-Waste gas condensate collector;

[0052] 31-Soil amendment processor; 32-Amended mixing mechanism; 33-Negative pressure reactor; 34-Reaction mixing mechanism; 35-Negative pressure tank; 36-Negative pressure machine; 37-Opening mechanism; 311-Amended soil discharge pipe; 321-Amended power motor; 322-Amended mixing paddle; 331-Lifting handle; 332-Fixed connector; 333-Negative pressure gauge; 341-Reaction mixing motor; 342-Reaction mixing paddle; 361-Exhaust pipe; 371-Lifting frame; 372-Lifting motor; 383-U-shaped clamp;

[0053] 41-Exhaust gas treatment tank; 42-Contaminator; 43-Waste gas reaction chamber; 44-Waste gas inlet pipe; 45-Microbubble tube; 46-Photocatalytic lamp column; 411-Microbubble aerator head; 412-Exhaust gas outlet;

[0054] 51-Mixer; 52-Spiral contact reactor; 53-Water storage tank; 54-Microbubble generator; 55-Synthesis device; 511-Condensate pipe; 521-Outer cylinder; 522-Central column; 523-Contact spiral; 551-Synthesis support; 552-Reactor body; 553-Synthesis power motor. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0056] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the invention can be combined with each other.

[0057] like Figure 1 and Figure 2 As shown, the complete set of organic polluted soil remediation and improvement equipment in this embodiment includes a soil pollution pretreatment device 1, a soil pollution pyrolysis treatment device 2 connected to the soil pollution pretreatment device 1 via a pipeline, a soil improvement treatment device, an exhaust gas treatment device 4 and an eluent treatment device 5 connected to the soil improvement treatment device, and a soil deep treatment device connected to the soil improvement treatment device. The soil improvement treatment device and the soil deep treatment device together constitute a soil treatment device 3.

[0058] Contaminated soil is sent to soil pollution pretreatment unit 1 for pretreatment. The pretreated soil is then sent to soil pollution pyrolysis treatment unit 2 for pyrolysis. The pyrolyzed soil is sent to soil improvement treatment unit for improvement treatment. The improved soil is then sent to soil deep treatment unit for negative pressure deep treatment. The deeply treated soil can be discharged. The eluent from pyrolysis is sent to eluent treatment unit 5 for treatment, and then stored or discharged. The exhaust gas from pyrolysis is sent to tail gas treatment unit 4 for treatment, and the treated tail gas is discharged.

[0059] The soil remediation and improvement equipment of this invention can perform soil pretreatment and pyrolysis treatment, and improve and deeply treat the pyrolyzed soil. It also separately treats the eluent and waste gas from pyrolysis, ensuring that the gas, liquid, and solid components after pyrolysis are fully treated. This complete set of organic polluted soil remediation and improvement equipment can improve soil treatment efficiency, reduce operating costs, and minimize secondary pollution, possessing significant application value and broad application prospects.

[0060] like Figures 3-5As shown, the soil pollution pretreatment device 1 includes, from top to bottom, a waste soil inlet 11, a waste downward extrusion chamber 12, a soil downward extrusion chamber 13, and a waste soil outlet 14. The outlet is connected to the soil pollution pyrolysis treatment device 2 through a soil eccentric reducer 29. An arched waste grid 15 is connected to the top of the soil downward extrusion chamber 13. An isolation cylinder 16 is connected inside the soil downward extrusion chamber 13. A lifting and stirring device 17 is installed in the isolation cylinder 16. A liquid pipeline 18 for spraying washing liquid and mixing liquid is inserted into the lower part of the isolation cylinder 16. A microbubble liquid injection device 19 is connected to the lower part of the lifting and stirring device 17.

[0061] The arched waste grid 15 blocks waste in the soil, allowing only soil to pass through. The waste slides along the arched waste grid 15 to the inner wall of the waste downward compression chamber 12. The waste is squeezed downwards on the inner wall of the waste downward compression chamber 12 and then discharged from the device, preventing the waste from affecting the subsequent soil treatment effect.

[0062] The soil downward squeezing chamber 13 squeezes the soil downward, and the soil that reaches the bottom of the soil downward squeezing chamber 13 is lifted by the lifting and mixing device 17 into the isolation cylinder 16, and then discharged back into the upper part of the soil downward squeezing chamber 13 from the top of the isolation cylinder 16. The lifting and mixing device 17 also mixes the soil while lifting it, so that part of the soil is circulated and agitated.

[0063] A liquid pipeline 18, for injecting leachate and mixing liquid, extends into the lower part of the isolation cylinder 16 to add the leachate and mixing liquid to the soil. A microbubble liquid injection device 19 is connected to the lower part of the lifting and stirring device 17 to inject microbubble liquid into the soil. Because some soil circulates and is thoroughly agitated between the soil downward squeezing chamber 13 and the isolation cylinder 16, the leachate and mixing liquid are fully mixed with the soil, and the microbubble liquid is also fully mixed with the soil. This ensures that the soil is adequately pretreated within the device, improving the treatment effect of the soil entering the next process.

[0064] A waste step plate 121 is provided between the waste downward compression chamber 12 and the soil downward compression chamber 13, and several waste discharge pipes 122 are connected to the waste step plate 121. A waste grid 15 extends into the waste downward compression chamber 12 to discharge the waste onto the inner wall of the waste downward compression chamber 12. Under the obstruction and guidance of the arched waste grid 15, the waste in the soil is compressed along the waste downward compression chamber 12 onto the waste step plate 121, and then discharged by the several waste discharge pipes 122, realizing reliable separation of waste from the soil and avoiding the waste from affecting the subsequent soil treatment effect.

[0065] Furthermore, a vibrator 151 is installed on the waste grid 15. The vibrator 151 allows the waste on the waste grid 15 to slide towards the inner wall of the waste downward compression chamber 12, preventing the waste from clogging the waste grid 15. The waste grid 15 is connected to the top of the soil downward compression chamber 13 via a flexible connecting device 152.

[0066] The waste downward compression chamber 12 has an upper waste downward compression spiral 123 and a lower waste downward compression spiral 124 on its inner wall. The spiral teeth of the upper waste downward compression spiral 123 and the lower waste downward compression spiral 124 are of different heights. The upper waste downward compression spiral 123 has smaller spiral teeth, making it easier for waste to enter its compression space, thus allowing waste sliding off the waste grid 15 to be smoothly compressed onto the lower waste downward compression spiral 124. The lower waste downward compression spiral 124 has larger spiral teeth, resulting in a better compression effect, ensuring that waste is reliably compressed onto the waste step plate 121 and then discharged from the waste discharge pipe 122, preventing situations where waste cannot enter the waste discharge pipe 122.

[0067] Specifically, a transmission wheel 171 is installed on the lifting and mixing device 17, and a lifting and mixing power device 172 for driving the transmission wheel 171 to rotate is connected to the transmission wheel 171. The lifting and mixing power device 172 drives the transmission wheel 171 to rotate, and the transmission wheel 171 drives the lifting and mixing device 17 to rotate, thereby lifting and mixing the soil in the isolation cylinder 16 in a spiral manner, realizing that part of the soil circulates and mixes between the soil downward extrusion chamber 13 and the isolation cylinder 16. The isolation cylinder 16 is fixed in the soil downward extrusion chamber 13 by a fixing frame 163.

[0068] The lifting and stirring power device 172 may include a motor, the output end of which is connected to a reducer, and the output end of the reducer is connected to a drive pulley. The drive pulley and the transmission pulley 171 are connected by belt drive. Furthermore, the transmission pulley 171 may be provided at both the upper and lower parts of the lifting and stirring device 17 to improve the stability of the lifting and stirring device 17 during rotation.

[0069] The soil downward squeezing chamber 13 is provided with a soil downward squeezing spiral 131 on its inner wall. During the process of soil circulation between the soil downward squeezing chamber 13 and the isolation cylinder 16, the soil between the outer walls of the soil downward squeezing chamber 13 and the isolation cylinder 16 can move downward along the soil downward squeezing spiral 131 to avoid soil blockage of the channel.

[0070] Specifically, the microbubble liquid injection device 19 includes a distribution plate 191, which is fixed to the bottom of the lifting and stirring device 17. A microbubble liquid inlet pipe 192 is connected to the bottom of the distribution plate 191, and several microbubble liquid nozzles 193 connected to the microbubble liquid inlet pipe 192 are arranged along the edge of the distribution plate 191. The microbubble liquid inlet pipe 192 introduces microbubble liquid into the distribution plate 191, and the several microbubble nozzles on the distribution plate 191 spray the microbubble liquid evenly, thereby ensuring thorough mixing of the microbubble liquid with the soil.

[0071] Microbubble liquid is sprayed from microbubble liquid nozzle 193. The specific method is determined according to the soil pollution status of the waste soil inlet 11: if COD < 1000 mg / L, oxygen is used as microbubble gas; if COD > 1000 mg / L, ozone is used as microbubble gas.

[0072] To facilitate soil entry into the isolation cylinder 16, a funnel-shaped circulation opening 161 is provided at the bottom of the isolation cylinder 16, and a liquid pipeline 18 extends into the funnel-shaped circulation opening 161. Several mud outlets 162 are provided at the top of the isolation cylinder 16. The funnel-shaped circulation opening 161 at the bottom of the isolation cylinder 16 facilitates soil entry into the isolation cylinder 16, forming a circulation from the soil, and the leachate, mixing liquid, and microbubble liquid can be more fully mixed with the soil at the funnel-shaped circulation opening 161.

[0073] Specifically, the waste soil inlet 11 includes a funnel-shaped feed hopper 111 and a constricted section 112, the diameter of which is smaller than the diameter of the waste downward extrusion chamber 12. The step between the constricted section and the waste downward extrusion chamber 12 serves as a barrier to prevent waste-containing soil from entering from the waste soil inlet 11.

[0074] The leachate comprises a surfactant, a chelating agent, a pH adjuster, and a biosurfactant; the surfactant has a mass concentration of 0.5–1.5%, the chelating agent has a mass concentration of 0.3–0.8%, the pH adjuster has a pH of 7–8, and the biosurfactant has a mass concentration of 0.1–0.3%; the leachate temperature is 30–35°C. By rationally configuring the leachate and controlling its temperature, the soil undergoes thorough and effective pretreatment.

[0075] like Figure 6 and Figure 7As shown, the soil pollution pyrolysis treatment device 2 includes a pyrolysis tank 21. A soil conveying pump 22 is connected to the bottom of the pyrolysis tank 21. The soil conveying pump 22 is connected to the soil pollution pretreatment device 1 through a soil eccentric reducer 29. A spiral stirrer 23 and a heating rod 24 are installed inside the pyrolysis tank 21. A liquid collection section 25 is connected to the top of the pyrolysis tank 21. The top of the liquid collection section 25 is connected to the exhaust gas treatment device 4 through an exhaust gas discharge pipe 26. A feeding conveyor belt 27 is connected to the upper part of the pyrolysis tank 21. The other end of the feeding conveyor belt 27 is connected to the soil improvement treatment device. The eluent discharge pipe 28 of the liquid collection section 25 is connected to the eluent treatment device 5.

[0076] Pretreated soil is pumped from the bottom into pyrolysis tank 21 by soil pump 22. Heating rods 24 in pyrolysis tank 21 heat the soil, and spiral agitator 23 thoroughly agitates it, ensuring complete separation of waste gas and eluent from the contaminated soil. The settled soil in pyrolysis tank 21 is output via conveyor belt 27, the filtered eluent is discharged through eluent discharge pipe 28, and the rising waste gas is discharged through waste gas discharge pipe 26. This invention effectively and thoroughly separates waste gas and eluent from pretreated contaminated soil, facilitating subsequent separate treatment of the soil, waste gas, and eluent.

[0077] Furthermore, a filter interceptor 211 is installed at the upper part of the pyrolysis tank 21, and the feed conveyor is located below the filter interceptor 211. The filter interceptor 211 can block soil and prevent large pieces of soil from entering the collection section 25, thereby achieving reliable separation of soil and eluent.

[0078] The lower part of the pyrolysis tank 21 is conical, and the outlet of the soil transport pump 22 is connected to the conical bottom of the pyrolysis tank 21.

[0079] The liquid collecting section 25 gradually narrows from bottom to top, with its lower end smoothly transitioning to the pyrolysis tank 21 and its upper end smoothly transitioning to the exhaust gas discharge pipe 26. The narrowing diameter of the liquid collecting section 25 facilitates the full discharge of the eluent within it.

[0080] Specifically, there are several spiral agitators 23, and the heating rod 24 is located in the middle of the pyrolysis tank 21, with the spiral agitators 23 arranged around the heating rod 24. The spiral agitators 23 thoroughly mix the soil, ensuring more uniform soil treatment.

[0081] Furthermore, the spiral stirrer 23 is connected to the positive terminal of an external power supply, and an anode material is coated on the spiral stirrer 23. The power supply voltage is 1–100V, and the current density is 1–800mA / cm². 2 The anode material is coated on the stirring blades of the spiral agitator 23, which can enhance the electrocatalytic effect on the soil and fully degrade pollutants in the soil.

[0082] The anode material is a conventional anode material such as ruthenium oxide or iridium oxide layer made of titanium-based material, boron-doped diamond, lead dioxide, SnO2 and Ti / SnO2.

[0083] Furthermore, the exhaust pipe 26 has a downward bend section 261, and the end of the downward bend section 261 is connected to a constriction section 262. As the exhaust gas passes through the downward bend section 261, the liquid in the waste gas can be fully condensed. A waste gas condensate collector 263 is connected to the bottom of the downward bend section 261. The condensate can be collected by the waste gas condensate collector 263, reducing the liquid content in the exhaust gas and facilitating its treatment.

[0084] like Figures 8-12 As shown, the soil improvement treatment device includes a soil improvement processor 31, which is equipped with an improvement mixing mechanism 32. The soil improvement processor 31 is connected to the soil pollution pyrolysis treatment device 2 via a feeding conveyor belt 27. The deep soil treatment device includes a negative pressure reactor 33, which is equipped with a reaction mixing mechanism 34. The soil improvement processor 31 is connected to an improved soil discharge pipe 311 for feeding the improved soil into the negative pressure reactor 33. The negative pressure reactor 33 is connected to a negative pressure tank 35 via a pipe, and the negative pressure tank 35 is connected to a negative pressure machine 36 via a pipe. Organic matter, inorganic materials, regulators, nitrogen, phosphorus, and potassium fertilizers and trace element fertilizers are added to the feeding conveyor belt 27.

[0085] The soil amendment processor 31 of this invention allows the addition of various amendment substances, which are then thoroughly stirred by the amendment mixing mechanism 32 to achieve complete soil amendment. The amended soil is then introduced into a negative pressure reactor 33 through an amended soil discharge pipe 311 for a negative pressure reaction. After the negative pressure reaction, beneficial microbial agents are added to the negative pressure reactor 33, resulting in deep soil treatment. The soil after amendment and deep negative pressure treatment meets discharge standards.

[0086] The soil improvement device is connected to a feeding conveyor belt 27, on which organic matter, inorganic materials, regulators, nitrogen, phosphorus, and potassium fertilizers, and micronutrient fertilizers are added. Depending on the properties of the incoming soil, the mixture is stirred within the soil improver 311, and the organic matter, inorganic materials, regulators, nitrogen, phosphorus, and potassium fertilizers, and micronutrient fertilizers are added. The organic matter consists of humus, compost, etc., in a mass ratio of 1:0.5 to 1:2. The inorganic materials consist of sand, vermiculite, etc., in a mass ratio of 1:0.2 to 1:0.5; these are used to improve the physical structure of the soil and enhance its permeability and water retention. The regulators consist of lime, sulfur, etc., used to adjust the soil pH to a suitable range of 6.5–7.5. Based on crop requirements, basic fertilizers such as nitrogen, phosphorus, and potassium, and micronutrient fertilizers (0.2–0.5 kg / m³) are added. 3 This is used to increase the nutrient content of the soil.

[0087] Specifically, the improved mixing mechanism 32 includes an improved power motor 321, which is mounted on the soil improvement processor 31. The output end of the improved power motor 321 is connected to an improved mixing paddle 322, which extends into the soil improvement processor 31.

[0088] Furthermore, the deep soil treatment device also includes a cover-opening mechanism 37 for opening and closing the cover of the negative pressure reactor 33. To ensure the airtightness of the negative pressure reactor 33 during the negative pressure reaction, the modified soil discharge pipe 311 is not directly connected to the negative pressure reactor 33. After the cover-opening mechanism 37 opens the cover of the negative pressure reactor 33, the modified soil discharge pipe 311 adds soil into the negative pressure reactor 33. After the cover is tightly closed, the negative pressure reaction is carried out to ensure the negative pressure effect.

[0089] Specifically, the opening mechanism 37 includes a lifting frame 371, on which a lifting motor 372 is mounted. A U-shaped clip 383 for connecting the cover of the negative pressure reactor 33 is connected to the lifting motor 372. One side of the cover of the negative pressure reactor 33 is hinged to the main body of the negative pressure reactor 33, and the other side of the cover is fixed with a lifting handle 331 that cooperates with the U-shaped clip 383 and a fixed connector 332 that is detachably connected to the main body of the negative pressure reactor 33. After the lifting motor 372 pulls the cover of the negative pressure reactor 33, the cover flips and opens, allowing soil to be added into the negative pressure reactor 33. After the soil is added, the cover is reliably sealed to the main body of the negative pressure reactor 33 through the fixed connector 332, ensuring a negative pressure environment.

[0090] Specifically, the reaction stirring mechanism 34 includes a reaction stirring motor 341, which is mounted on the negative pressure reactor 33. The output end of the reaction stirring motor 341 is connected to a reaction stirring paddle 342, which extends into the negative pressure reactor 33.

[0091] A negative pressure gauge 333 is installed on the cover of the negative pressure reactor 33. An exhaust pipe 361 is connected to the negative pressure unit 36. The exhaust pipe 361 can send the discharged gas to the waste gas treatment device.

[0092] After the negative pressure reaction, a beneficial microbial agent is added to the negative pressure reactor 33. The beneficial microbial agent is one of nitrogen-fixing bacteria, phosphorus-solubilizing bacteria, and organic matter-decomposing bacteria. The beneficial microbial agent is used to enhance the biological activity of the soil, and the addition amount is 10⁶–10⁸ cells / m³.

[0093] like Figure 13 and Figure 14As shown, the eluent treatment device 5 includes a mixer 51, a spiral contact reactor 52, and a water storage tank 53. The mixer 51 is connected to the soil pollution pyrolysis treatment device 2 through the eluent discharge pipe 28. The mixer 51 is connected to the lower part of the spiral contact reactor 52 through a pipe. The inner surface of the spiral contact reactor 52 is loaded with active material. The upper part of the spiral contact reactor 52 is connected to the water storage tank 53.

[0094] The inner surface of the spiral contact reactor 52 of this invention is loaded with active material. After the eluent enters the spiral contact reactor 52, it slowly rises along the internal spiral, allowing the active material to fully contact the eluent, thus ensuring that the eluent is fully treated. The treated eluent is discharged from the top of the spiral contact reactor 52 into a water storage tank 53 for storage.

[0095] Furthermore, the mixer 51 is connected via a pipe to a microbubble generator 54 for generating microbubble liquid. The microbubble liquid generated by the microbubble generator 54 is delivered to the mixer 51, and the microbubble liquid also enters the spiral contact reactor 52 along with the elution.

[0096] The water tank 53 is connected to the microbubble generator 54 via a pipe. The microbubble generator 54 requires clean water to generate microbubble liquid, and the treated water in the water tank 53 can provide the water source for the microbubble generator 54.

[0097] The mixer 51 is connected to a condensate pipe 511 for feeding condensate. The condensate in the exhaust gas after soil treatment is collected and discharged into the mixer 51, so that it can be treated together with the spiral contact reactor 52.

[0098] Specifically, the spiral contact reactor 52 includes an outer cylinder 521, a central column 522 fixed inside the outer cylinder 521, and a contact spiral 523 connecting the central column 522 and the inner wall of the outer cylinder 521. Active material is loaded on the surface of the contact spiral 523. The contact spiral 523 between the central column 522 and the outer cylinder 521 forms a channel for the eluent. As the eluent slowly rises along the contact spiral 523, it fully contacts and reacts with the active material on the contact spiral 523, ensuring thorough treatment of the eluent.

[0099] Furthermore, the surface of the contact spiral 523 is rough before the active material is loaded. The original rough surface of the contact spiral 523 facilitates the loading of the base material. The active material is either iron-based or carbon-based. The active material is primarily a material capable of catalytically reacting with ozone microbubbles, mainly iron-based (FeS2, ZVI) and carbon-based materials (CNT, biochar).

[0100] like Figure 15As shown, the synthesis device 55 of the eluent treatment apparatus 5 includes a synthesis support 551, within which a reactor body 552 is fixed. A spiral contact reactor 52 is placed inside the reactor body 552. A synthesis power motor 553 is mounted on the synthesis support 551, and the output end of the synthesis power motor 553 is connected to the central column 522 of the spiral contact reactor 52. An active material slurry is added inside the reactor body 552. A heating device is installed on the inner wall of the reactor body 552. A reactor cover is connected to the top of the reactor body 552, and the output shaft of the synthesis power motor 553 passes through the reactor cover. During the rotation of the spiral contact reactor 52 driven by the synthesis power motor 553, the active material slurry comes into full contact with the spiral contact reactor 52, thereby allowing the active material to adhere to the surface of the spiral contact reactor 52.

[0101] like Figure 16 and Figure 17 As shown, the exhaust gas treatment device 4 includes an exhaust gas treatment tank 41, and several layers of contactors 42 are installed inside the exhaust gas treatment tank 41. The several layers of contactors 42 divide the interior of the exhaust gas treatment tank 41 into several waste gas reaction chambers 43. The waste gas reaction chambers 43 are filled with water. The surfaces of the contactors 42 are coated with photocatalytic materials and contact catalytic materials. The bottom of the exhaust gas treatment tank 41 is connected to a waste gas discharge pipe 44. The soil pollution pyrolysis treatment device 2 is connected to the waste gas discharge pipe 44 through a waste gas discharge pipe 26.

[0102] The surface of the contactor 42 is coated with photocatalytic material and contact catalytic material. After the exhaust gas enters the tail gas treatment tank 41 through the exhaust gas discharge pipe 44, it comes into full contact with the photocatalytic material and contact catalytic material, so that the tail gas can be fully catalyzed and the treated tail gas meets the emission standards.

[0103] The end of the exhaust gas inlet pipe 44 furthest from the tail gas treatment tank 41 is connected to an exhaust gas outlet pipe 26 for introducing exhaust gas. Exhaust gas generated after the soil pyrolysis treatment is discharged into the exhaust gas outlet pipe 26, and then sent into the tail gas treatment tank 41 via the exhaust gas inlet pipe 44. The section of the exhaust gas outlet pipe 26 connecting to the exhaust gas inlet pipe 44 is a narrowing section to prevent backflow of liquid within the tail gas treatment tank 41.

[0104] The exhaust gas treatment tank 41 is connected to a microbubble tube 45. The microbubble tube 45 delivers microbubble liquid into the exhaust gas treatment tank 41, where the microbubbles react with the photocatalytic material and the contact catalytic material on the surface of the contactor 42. The exhaust gas treatment tank 41 is equipped with several microbubble aerators 411, which are connected to the microbubble tube 45. These aerators spray the microbubble liquid from different positions, resulting in a more uniform distribution of the microbubble liquid within the exhaust gas treatment tank 41. The microbubble aerators 411 are arranged in a ring within the exhaust gas treatment tank 41.

[0105] The exhaust gas treatment tank 41 is equipped with several photocatalytic lamp columns 46, which penetrate several contactors 42. The photocatalytic lamp columns 46 promote the catalytic reaction on the contactors 42. The top of the exhaust gas treatment tank 41 is provided with an exhaust gas outlet 412. The treated gas is discharged from the exhaust gas outlet 412. The bottom of the exhaust gas treatment tank 41 is conical, and the exhaust gas inlet pipe 44 is connected to the conical bottom of the exhaust gas treatment tank 41.

[0106] This invention is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this invention. However, regardless of any changes made in their shape or structure, any technical solution that falls within the scope of the claims of this invention shall be protected by this invention.

Claims

1. A complete set of equipment for remediating and improving organically polluted soil, characterized in that: It includes a soil pollution pretreatment device (1), which is connected to a soil pollution pyrolysis treatment device (2) via a pipeline. The soil pollution pyrolysis treatment device (2) is connected to a soil improvement treatment device, a tail gas treatment device (4), and a washing liquid treatment device (5). The soil improvement treatment device is connected to a soil deep treatment device. The soil pollution pretreatment device (1) includes, from top to bottom, a waste soil inlet (11), a waste downward extrusion chamber (12), a soil downward extrusion chamber (13), and a waste soil outlet (14). The outlet is connected to the soil pollution pyrolysis treatment device (2) through a soil eccentric reducer (29). An arched waste grid (15) is connected to the top of the soil downward extrusion chamber (13). An isolation cylinder (16) is connected inside the soil downward extrusion chamber (13). A lifting and stirring device (17) is installed in the isolation cylinder (16). A liquid pipeline (18) for spraying in washing liquid and mixing liquid extends into the lower part of the isolation cylinder (16). A microbubble liquid injection device (19) is connected to the lower part of the lifting and stirring device (17). A waste step plate (121) is provided between the waste downward compression chamber (12) and the soil downward compression chamber (13), and a number of waste discharge pipes (122) are connected to the waste step plate (121); an upper waste downward compression spiral (123) and a lower waste downward compression spiral (124) are provided on the inner wall of the waste downward compression chamber (12), and the height of the spiral teeth of the upper waste downward compression spiral (123) and the height of the spiral teeth of the lower waste downward compression spiral (124) are respectively; a vibrator (151) is installed on the waste grid (15), and the waste grid (15) is connected to the top of the soil downward compression chamber (13) through a flexible connecting device (152); The eluent treatment device (5) includes a mixer (51), a spiral contact reactor (52) and a water storage tank (53). The mixer (51) is connected to the soil pollution pyrolysis treatment device (2) through the eluent discharge pipe (28). The mixer (51) is connected to the lower part of the spiral contact reactor (52) through a pipe. The inner surface of the spiral contact reactor (52) is loaded with active materials. The upper part of the spiral contact reactor (52) is connected to the water storage tank (53). It also includes a synthesis device (55); the synthesis device (55) includes a synthesis support (551), a reactor body (552) is fixed inside the synthesis support (551), a spiral contact reactor (52) is placed inside the reactor body (552), a synthesis power motor (553) is installed on the synthesis support (551), the output end of the synthesis power motor (553) is connected to the central column (522) of the spiral contact reactor (52), and an active material slurry is added inside the reactor body (552).

2. The complete set of organic polluted soil remediation and improvement equipment according to claim 1, characterized in that: The rinsing solution includes surfactants, chelating agents, pH adjusters, and biosurfactants; the mass concentration of the surfactants is 0.5-1.5%, the mass concentration of the chelating agents is 0.3-0.8%, the pH of the pH adjuster is 7-8, and the mass concentration of the biosurfactants is 0.1-0.3%; the temperature of the rinsing solution is 30-35℃.

3. The complete set of organic polluted soil remediation and improvement equipment according to claim 1, characterized in that: The soil pollution pyrolysis treatment device (2) includes a pyrolysis tank (21), a soil conveying pump (22) is connected to the bottom of the pyrolysis tank (21), the soil conveying pump (22) is connected to the soil pollution pretreatment device (1) through a soil eccentric reducer (29), a spiral stirrer (23) and a heating rod (24) are installed inside the pyrolysis tank (21), a liquid collection section (25) is connected to the top of the pyrolysis tank (21), the top of the liquid collection section (25) is connected to the tail gas treatment device (4) through a waste gas discharge pipe (26), a feeding conveyor (27) is connected to the upper part of the pyrolysis tank (21), the other end of the feeding conveyor (27) is connected to the soil improvement treatment device, and the eluent discharge pipe (28) of the liquid collection section (25) is connected to the eluent treatment device (5).

4. A complete set of organic polluted soil remediation and improvement equipment according to claim 3, characterized in that: The spiral stirrer (23) is connected to the positive terminal of an external power supply, and the spiral stirrer (23) is coated with an anode material; the anode material is one of ruthenium oxide or iridium oxide layer made of titanium-based material, boron-doped diamond, lead dioxide, SnO2 and Ti / SnO2.

5. A complete set of organic polluted soil remediation and improvement equipment according to claim 1, characterized in that: The soil improvement treatment device includes a soil improvement processor (31), which is equipped with an improvement stirring mechanism (32). The soil improvement processor (31) is connected to the soil pollution pyrolysis treatment device (2) via a feeding conveyor (27). The soil deep treatment device includes a negative pressure reactor (33), which is equipped with a reaction stirring mechanism (34). The soil improvement processor (31) is connected to an improved soil discharge pipe (311) for feeding the improved soil into the negative pressure reactor (33). The negative pressure reactor (33) is connected to a negative pressure tank (35) via a pipe. The negative pressure tank (35) is connected to a negative pressure machine (36) via a pipe. Organic matter, inorganic materials, regulators, nitrogen, phosphorus and potassium fertilizers and trace element fertilizers are added to the feeding conveyor (27).

6. A complete set of organic polluted soil remediation and improvement equipment according to claim 5, characterized in that: The soil deep treatment device also includes a cover opening mechanism (37) for opening and closing the cover of the negative pressure reactor (33); the cover opening mechanism (37) includes a lifting frame (371), a lifting motor (372) is installed on the lifting frame (371), and a U-shaped clip (383) for connecting the cover of the negative pressure reactor (33) is connected to the lifting motor (372); one side of the cover of the negative pressure reactor (33) is hinged to the main body of the negative pressure reactor (33), and the other side of the cover of the negative pressure reactor (33) is fixed with a lifting handle (331) that cooperates with the U-shaped clip (383) and a fixed connector (332) that is detachably connected to the main body of the negative pressure reactor (33).

7. A complete set of organic polluted soil remediation and improvement equipment according to claim 1, characterized in that: The exhaust gas treatment device (4) includes an exhaust gas treatment tank (41), which is equipped with several layers of contactors (42). The several layers of contactors (42) divide the interior of the exhaust gas treatment tank (41) into several waste gas reaction chambers (43). The waste gas reaction chambers (43) are filled with water. The surface of the contactors (42) is coated with photocatalytic material and contact catalytic material. The bottom of the exhaust gas treatment tank (41) is connected to a waste gas discharge pipe (44). The soil pollution pyrolysis treatment device (2) is connected to the waste gas discharge pipe (44) through a waste gas discharge pipe (26).

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