Bubble in-situ circulation remediation well for polluted soil and / or underground water and application thereof

Abstract

The invention relates to a bubble in-situ circulation repair well for polluted soil and / or underground water and application thereof. The circulation repair well comprises an in-well pipe, a gas inlet pipe and a gas outlet pipe, the well outer pipe is sleeved outside the well inner pipe; the well head is arranged at the front end of the circulating repair well; the porous structure is arranged between the well head and the well inner pipe; the bubble repairing liquid is injected into the polluted area by the well outer pipe through the circulating repairing well branch pipe; and the branch pipe is communicated with the circulating repair well branch pipe and the well outer pipe in a chaining manner so as to introduce the bubble repair liquid and adjust the position and angle of the circulating repair well branch pipe. Compared with the prior art, the circulating repair well is used for injecting the repair liquid in a dispersed mode to repair the polluted soil and / or underground water, the circulating repair well can continuously and circularly convey the repair liquid to a polluted area, and the circulating repair well and related design have dynamic performance, continuity, controllability, sealing performance and stability; it is ensured that the remediation liquid can be evenly distributed and continuously act on the polluted area, and meanwhile waste of the remediation liquid and secondary pollution to the surrounding environment are avoided.

Description

Technical Field

[0001] The present invention relates to the field of environmental technologies, and in particular, to a bubble in-situ circulation remediation well for contaminated soil and / or groundwater and its application. Background Art

[0002] In-situ remediation technologies have been widely applied to various contaminated sites, including heavy metal pollution, organic pollutants, etc. Advantages such as low treatment cost, few surface treatment facilities, low pollutant exposure rate, and small environmental disturbance have made it a promising groundwater pollution remediation technology. In-situ remediation technologies do not require soil excavation, causing less interference to the environment. They can reduce pollutant exposure and health and safety risks. Compared with traditional excavation and treatment methods, in-situ remediation technologies are usually less costly. Currently, existing technologies face challenges in effectively intercepting and treating pollutants, especially for those that are difficult to degrade. With the development of new materials and technologies, in-situ remediation technologies are also constantly evolving. For example, the application of nanotechnology can improve the remediation efficiency. In-situ remediation technology is an important research direction in the field of soil and groundwater pollution remediation. It has multiple technical paths and broad application prospects, but also faces some technical and implementation challenges.

[0003] Chinese Patent (CN102652956A) discloses a method for in-situ leaching treatment of chromium-contaminated soil. A plurality of groundwater extraction wells are installed around the soil area to be leached. The contaminated soil is leached by sprinkling water on the surface. The leaching water containing hexavalent chromium enters the groundwater, and the groundwater containing hexavalent chromium is pumped to the surface for water treatment and then reused for surface sprinkling leaching through the control of the groundwater flow field. This method has low leaching efficiency and can only treat free chromium in the soil. Chinese Patent (CN103736722A) discloses an in-situ leaching treatment system for contaminated soil, including a sewage treatment device and multiple horizontal wells connected to the sewage treatment device. Vertical extraction wells can be set as necessary according to the site conditions. This treatment system can improve the efficient leaching of heavy metals in the soil, but it can also only treat free metals in the soil, and during the leaching process, the leaching solution easily seeps into the groundwater, causing pollution to the groundwater. Chinese Patent (CN103785680A) discloses a step-by-step in-situ soil leaching and its stabilization / solidification method. This method combines in-situ leaching technology with stabilization / solidification technology to further reduce the dissolution risk of pollutants. However, during the leaching process, it mainly relies on water pressure to laterally leach the soil, with low leaching efficiency, and during the leaching process, the leaching solution easily penetrates and pollutes the groundwater.

[0004] Therefore, there is an urgent need for a circulation remediation well that uses in-situ remediation, has low input, high efficiency, small disturbance, little secondary pollution, and is safe and green, and its application in the remediation of contaminated soil and / or groundwater pollution. Summary of the Invention

[0005] The object of the present invention is to overcome the defects existing in the above-mentioned prior art and provide an in-situ bubble circulation repair well for contaminated soil and / or groundwater and its application. The circulation repair well is used to disperse and inject a repair liquid into the contaminated soil and / or groundwater. The circulation repair well can continuously circulate and transport the repair liquid to the contaminated area. The circulation repair well and related designs have dynamics, persistence, controllability, sealing and stability, ensuring that the repair liquid can be evenly distributed and continuously act on the contaminated area, while avoiding waste of the repair liquid and secondary pollution to the surrounding environment.

[0006] The object of the present invention can be achieved by the following technical solutions:

[0007] The first object of the present invention is to provide an in-situ bubble circulation repair well for contaminated soil and / or groundwater, and the circulation repair well includes:

[0008] An inner well pipe, which is arranged at the rear end of the circulation repair well;

[0009] An outer well pipe, which is sleeved outside the inner well pipe;

[0010] A well head, which is arranged at the front end of the circulation repair well;

[0011] A porous structure, which is arranged between the well head and the inner well pipe;

[0012] A circulation repair well branch pipe, which is connected to the outer well pipe. The outer well pipe injects the bubble repair liquid into the soil or groundwater contaminated area through the circulation repair well branch pipe;

[0013] A branch pipe connection, which connects the circulation repair well branch pipe and the outer well pipe. The branch pipe connection is used to communicate the circulation repair well branch pipe and the outer well pipe to introduce the bubble repair liquid, and adjust the position and angle of the circulation repair well branch pipe according to the change of the repair depth.

[0014] Furthermore, the well head is wedge-shaped and is used to insert into the contaminated soil and / or groundwater area.

[0015] Furthermore, the circulation repair well further includes:

[0016] A sedimentation pipe, which is arranged at the lower end of the well head;

[0017] A connecting rod, which is connected to the sedimentation pipe. The connecting rod is used to extract the sedimentation pipe to remove sediments.

[0018] Furthermore, the circulation repair well further includes:

[0019] A well partition, which is used to isolate the repair liquid injection area and the repair liquid recovery area;

[0020] A well partition is provided between the in-well pipe and the porous structure, and a well partition is provided between the well head and the porous structure.

[0021] Furthermore, the circulating remediation well further includes:

[0022] A branch well tip, which is connected to the circulating remediation well branch pipe. The branch well tip is provided at the end of the circulating remediation well branch pipe and is used to assist the circulating remediation well branch pipe to enter different remediation areas;

[0023] A well top port, which is provided at the rear ends of the outer well pipe and the in-well pipe. The well top port is used to assist in lifting the circulating remediation well.

[0024] Furthermore, the outer well pipe of the circulating remediation well is connected to the circulating remediation well branch pipe. When the circulating remediation well branch pipe is pressed into the remediation area, after the circulating remediation well branch pipe is joined and closely attached to the outer well pipe through the branch connection and inserted into the polluted area, the circulating remediation well drives the circulating remediation well branch pipe to horizontally insert into the remediation area during the upward movement process;

[0025] A well top port is provided at the upper end of the circulating remediation well. By lifting the well top port of the circulating remediation well, the whole circulating remediation well moves upward;

[0026] During the upward movement process of the circulating remediation well, the branch well tip of the circulating remediation well branch pipe drives the circulating remediation well branch pipe to horizontally unfold.

[0027] Furthermore, multiple circulating remediation wells are combined or used separately according to the scope of the polluted area. The multi-functional main pipe of the circulating remediation well (including the outer well pipe and the in-well pipe) and its branch pipes (circulating remediation well branch pipes) horizontally unfold to form a longitudinal and transverse spatial three-dimensional remediation area network.

[0028] Furthermore, the end of the circulating remediation well branch pipe is rotatably connected to the outer well pipe through a branch connection;

[0029] Multiple groups of circulating remediation well branch pipes are provided along the axial direction of the outer well pipe;

[0030] Multiple circulating remediation well branch pipes in each group of circulating remediation well branch pipes are evenly distributed along the circumferential direction of the outer well pipe;

[0031] The branch connection includes a connecting hose. The two ends of the connecting hose are respectively connected to the circulating remediation well branch pipe and the outer well pipe. The connecting hose connects the circulating remediation well branch pipe and the outer well pipe to introduce the bubble remediation liquid in the outer well pipe into the circulating remediation well branch pipe.

[0032] Furthermore, the outlets of the outer well pipe of the circulating remediation well, the outlets of the circulating remediation well branch pipes, and the top of the circulating remediation well are of a porous structure. The outer well pipe and the circulating remediation well branch pipes disperse the remediation liquid into the remediation area. The porous filtration at the top of the circulating remediation well is used to prevent solid impurities in the extracted remediation liquid from entering the circulation system.

[0033] Furthermore, the cyclic remediation well is divided into an inner well pipe and an outer well pipe. The outer well pipe is used to inject the remediation liquid into the contaminated area, and the inner well pipe extracts the remediation liquid through suction filtration at the bottom of the wellhead. After the remediation liquid remediates the contaminated soil and / or groundwater, the remediation liquid is recycled through extraction treatment. The branch pipe of the cyclic remediation well is hinged to the outer pipe. When the remediation well drills downward into the soil, the branch pipe drills into the soil in the same direction as the drilling. When the well is lifted, the branch pipe unfolds horizontally to inject the remediation liquid horizontally, and the outer well pipe injects the remediation liquid longitudinally. The branch pipe of the cyclic remediation well is connected to the outer well pipe through a branch pipe (hinge). When the cyclic remediation well drills downward into the soil, the branch pipe of the cyclic remediation well drills into the soil in the same direction as the drilling. When the branch pipe of the cyclic remediation well is lifted, the branch pipe of the cyclic remediation well unfolds horizontally to inject the remediation liquid horizontally, and the outer well pipe injects the remediation liquid longitudinally. The porous filtration of the cyclic remediation well is used to prevent solid impurities in the extracted remediation liquid from entering the cycle.

[0034] Furthermore, when the cyclic remediation well drills to the remediation depth, the main pipe (including the outer well pipe and the inner well pipe) is vertically inserted into the remediation area for longitudinal remediation, and the branch pipe (the branch pipe of the cyclic remediation well) unfolds horizontally for horizontal remediation. The bottom extraction of the remediation well forms a three-dimensional cyclic remediation system. The cyclic remediation well is divided into an outer well pipe and an inner well pipe. The outer well pipe is used to inject the remediation liquid into the contaminated area, and the inner well pipe extracts the remediation liquid through suction filtration at the bottom of the wellhead (the well head). After the remediation liquid remediates the soil and groundwater, the remediation liquid is recycled through bubble generation after extraction treatment.

[0035] Furthermore, the remediation liquid enters the contaminated area through the main pipe (including the outer well pipe and the inner well pipe) and the branch pipe (the branch pipe of the cyclic remediation well) of the cyclic remediation well, and the remediation liquid repairs from top to bottom under the action of gravity;

[0036] A porous structure is arranged at the upper end of the well head for the extraction device to extract and recycle the remediation liquid, and the porous structure is used to filter large particle impurities;

[0037] A sedimentation pipe is arranged at the bottom end of the cyclic remediation well for collecting accumulated fine particle impurities, and the sedimentation pipe is connected through a connecting rod to remove the sediment in the well;

[0038] A partition (well partition) is arranged in the remediation well to isolate the remediation liquid injection area and the remediation liquid recovery area to prevent the mixing of the remediation liquid.

[0039] Furthermore, the cyclic remediation well and the application method can simultaneously or separately repair heavy metals, organic substances or heavy metal-organic comprehensive pollutants, reduce the use amount of the remediation liquid while reducing the remediation cost, and each unit can be independently applied to a small-scale contaminated area, or each unit can be combined for the remediation of a large-scale area.

[0040] The second object of the present invention is to provide an application of an in-situ cyclic remediation well for contaminated soil and / or groundwater, and use the in-situ cyclic remediation well for contaminated soil and / or groundwater to remediate the pollution in the soil and / or groundwater pollution area.

[0041] Further, the in-situ cyclic remediation well for contaminated soil and / or groundwater is used in an in-situ remediation system for a contaminated area to achieve the remediation of soil and / or groundwater pollution in the contaminated area.

[0042] Further, apply the in-situ cyclic remediation of nano- and / or micro-nano bubbles for contaminated soil and / or groundwater and the in-situ remediation system for the contaminated area to the remediation of contaminated soil, separate groundwater pollution or combined soil and groundwater pollution. During the in-situ remediation process of the contaminated area, heavy metals, organic substances or combined heavy metal and organic pollutants can be remediated simultaneously or separately.

[0043] Further, the cyclic remediation well is connected to nano- and / or micro-nano bubble remediation liquid purification materials and gas purification materials, and the purification materials are regenerated and reused in a cycle;

[0044] The cyclic remediation well is connected to a detection and circulation loop for nano- and / or micro-nano bubble remediation liquid and remediation gas. After the detection meets the standards, the remediation liquid and remediation gas enter the cyclic remediation well for recycling. If they do not meet the standards, they are re-purified with purification materials until they meet the standards and then recycled;

[0045] The cyclic remediation well is connected to a nano- and / or micro-nano remediation liquid disposal and reuse subsystem (collectively referred to as the remediation liquid circulation subsystem) for filtering impurities in the remediation liquid, adsorbing pollutants, separating solid and liquid, compressing, and dehydrating. The purified remediation liquid enters the cyclic remediation well for recycling;

[0046] The cyclic remediation well is connected to a foam barrier subsystem for preparing a barrier foam to form a flexible barrier in the remediation space of the cyclic remediation well to block the migration of pollutants in the soil and groundwater and the overflow and diffusion of the bubble remediation liquid.

[0047] The cyclic remediation well is connected to a monitoring subsystem for monitoring the soil and groundwater parameters in the remediation area of the cyclic remediation well, which serves as the basis for optimizing and adjusting the entire remediation system;

[0048] The cyclic remediation well is connected to an intelligent control device to adjust the injection amount of nano- and micro-nano bubbles according to the monitoring data, realizing the intelligent management of the remediation process.

[0049] Further, the in-situ remediation system for the contaminated area includes a bubble remediation liquid generation subsystem, a remediation liquid circulation subsystem, and a foam barrier subsystem;

[0050] The remediation liquid circulation subsystem includes a cyclic remediation well;

[0051] The cyclic remediation well is connected to the contaminated area;

[0052] The bubble repair liquid generation subsystem is connected to the repair liquid circulation subsystem;

[0053] The bubble repair liquid generation subsystem is used to generate nano- and / or micro-nano bubbles through the repair liquid and gas to adsorb and degrade pollutants in the soil and / or groundwater pollution area;

[0054] The repair liquid circulation subsystem is used to continuously circulate and transport the repair liquid to the soil and / or groundwater pollution area;

[0055] The foam barrier subsystem is connected to the pollution area, and the foam barrier subsystem is used to generate foam on the surface layer, longitudinally and at the bottom of the soil and / or groundwater pollution area to form an all-round pollution foam barrier layer.

[0056] Further, the bubble repair liquid generation subsystem includes a gas generation device, a bubble repair liquid generation device, and a pressurization device;

[0057] The gas generation device is connected to the bubble repair liquid generation device;

[0058] The pressurization device is connected to the bubble repair liquid generation device, and the pressurization device is connected to the circulation repair well. The pressurization device is used to enter the pollution area through the circulation repair well the bubble repair liquid prepared by the bubble repair liquid generation device.

[0059] Further, the repair gas includes but is not limited to ozone, oxygen, carbon dioxide, air, etc. for preparing nano- and / or micro-nano bubble repair liquid.

[0060] Further, the circulation repair well horizontally and vertically transports the bubble repair liquid to the repair range, and the inside of the circulation repair well is hollow for extracting and recycling the repaired bubble repair liquid.

[0061] Further, the bubble repair liquid generation device includes but is not limited to one or more of the following methods: pressure dissolution and decompression gas release type, pressure dissolution and impeller gas dispersion type, swirling liquid flow type, micro pore type, static mixer type, mixed steam direct contact condensation type, ultrasonic cavitation type, spiral cavitation type.

[0062] Further, the particle size range of nano-bubbles is between 20 - 500 nm, and the particle size range of micro-nano bubbles is between 100 nm - 100 μm.

[0063] Furthermore, the gas generation device is used for generating gases (such as ozone, oxygen, carbon dioxide, air, etc.) for soil, groundwater, or combined soil and groundwater pollution. The remediation liquid is injected into the contaminated soil and groundwater area through a circulation remediation well by means of a pressurization device (high-pressure pump), a flowmeter, and a diversion valve. The generation device generates remediation nano- and / or micro-nano bubbles, which are transported through pipelines to the circulation remediation well and injected into the contaminated area as a remediation liquid for pollution remediation. The remediation and extraction are carried out simultaneously and recycled after treatment. The nano- and / or micro-nano bubbles can adsorb the pollutants in the contaminated area on their surface or decompose the pollutants through redox reactions, and then the treated water and pollutants are taken out together with the pumping process to achieve the purpose of remediation. The remediation gas is generated by the bubble generation device as a nano- and / or micro-nano bubble remediation liquid, longitudinally injected into the contaminated depth of the soil or groundwater to be remediated through the drilling well of the circulation remediation well (including the outer pipe and the inner pipe of the well), and laterally injected into the contaminated range of the soil or groundwater to be remediated through the drilling branch pipe (the branch pipe of the circulation remediation well).

[0064] Furthermore, during the pressurization and extraction of nano- and / or micro-nano bubbles, parameters such as pressure and temperature need to be precisely controlled. Minor changes in the parameters may affect the generation quantity, size, and stability of nano-bubbles. The pressurization process can also change the internal pressure and gas concentration of nano- and / or micro-nano bubbles. Appropriate pressurization can make the size of nano-bubbles more uniform, increase the stability of nano- and / or micro-nano bubbles in the liquid, enable gas molecules to be more closely packed inside the bubbles, and at the same time make the charge distribution on the bubble surface more stable.

[0065] Furthermore, the foam barrier subsystem includes a foam barrier device and barrier foam;

[0066] The foam barrier device is connected to the contaminated soil. The foam barrier device is used for generating barrier foam and injecting the barrier foam into the pores of the contaminated soil in the contaminated area.

[0067] Furthermore, the foam barrier device is used for generating barrier foam. The barrier foam can fill the voids in the soil pores and block the migration of soil and groundwater pollutants. Adsorbents and reactive materials are added to the foam. The adsorbents include, but are not limited to, activated carbon, bentonite, etc., which can adsorb heavy metal ions and organic pollutants in soil and groundwater. The reactive substances in the foam can undergo chemical reactions with pollutants. For example, foams containing oxidation reagents can undergo redox reactions with reducing pollutants such as sulfides in groundwater, converting harmful pollutants into relatively harmless substances. For some organic pollutants, microorganisms or enzymes in the foam can catalyze the degradation reaction to decompose pollutants. Chelating agents are added to the foam material, and this chelating agent can form stable complexes with heavy metal ions, thereby fixing the heavy metals and preventing their migration.

[0068] Furthermore, the foam barrier subsystem connected to the cyclic remediation well prepares barrier foam and injects it into the voids in the subsurface filled soil pores. The barrier foam is sprayed on the ground surface and longitudinally and bottom-injected into the flexible barrier layer to form a three-dimensional spatial barrier. Adsorbents, reactive materials, microorganisms, or enzymes are added to the foam material to repair heavy metal ions and organic pollutants in the contaminated area. Adsorbents such as activated carbon and bentonite can adsorb heavy metal ions and organic pollutants in soil and groundwater. Reactive materials can undergo chemical reactions with pollutants to complete the chemical remediation process. Foam containing oxidation reagents can undergo redox reactions with reducing pollutants such as sulfides in groundwater, converting harmful pollutants into relatively harmless substances. Adding microorganisms or enzymes can catalyze degradation reactions and decompose pollutants.

[0069] Furthermore, the foam barrier subsystem is used to generate barrier foam that can fill voids in soil pores, forming a flexible physical barrier to block the migration of pollutants in soil and groundwater. The foam barrier device, i.e., the foam generator, generates foam barriers that can be used for surface barrier, longitudinal barrier, and bottom barrier of the pollution area, and the range of barrier and spraying thickness can be selected according to needs to comprehensively block pollution and prevent the overflow of the remediation liquid. Adsorbents and reactive materials are added to the foam. Adsorbents such as activated carbon and bentonite can adsorb heavy metal ions and organic pollutants in soil and groundwater, and the reactive substances in the foam can undergo chemical reactions with pollutants to complete the chemical remediation process. Foam containing oxidation reagents can undergo redox reactions with reducing pollutants such as sulfides in groundwater, converting harmful pollutants into relatively harmless substances. Microorganisms or enzymes in the foam can catalyze degradation reactions and decompose organic pollutants. The foam barrier confines the remediation liquid within the remediation range area, reducing the remediation cost and preventing secondary pollution.

[0070] Furthermore, the remediation liquid circulation subsystem further includes a circulation extraction device, a first remediation liquid detection device, a remediation liquid treatment device, a second remediation liquid detection device, a purification material reuse device, a solid waste resource utilization device, and a gas purification device;

[0071] The circulation extraction device is connected to the cyclic remediation well. The circulation extraction device extracts the bubble remediation liquid through the porous structure of the cyclic remediation well, and the circulation extraction device is used to extract the remediated bubble remediation liquid from the inner pipe of the cyclic remediation well and send it to the first remediation liquid detection device;

[0072] The first remediation liquid detection device is connected to the circulation extraction device, and the first remediation liquid detection device is connected to the remediation liquid treatment device;

[0073] The repair liquid treatment device is connected to the second repair liquid detection device, the repair liquid treatment device is connected to the purification material recycling device, the repair liquid treatment device is connected to the solid waste resource utilization device, and the repair liquid treatment device is connected to the gas purification device;

[0074] The gas purification device is connected to the bubble repair liquid generating device, and the gas purification device is connected to the solid waste resource utilization device;

[0075] The repair liquid treatment device is used to separate the repair liquid, pollutants, and solid impurities, and obtain the first separated solid, separated gas, and purification material. The first separated solid enters the solid waste resource utilization device for recycling, the purification material is recycled through the purification material recycling device, and the recycled purification material returns to the repair liquid treatment device. After being filtered in the purification material recycling device, the solid impurities are dehydrated and dried and enter the solid waste resource utilization device for centralized resource utilization. The separated gas enters the gas purification device for gas purification, the obtained purified gas enters the bubble repair liquid generating device for gas cycle recycling, the obtained second separated solid enters the solid waste resource utilization device for recycling, and the obtained separated liquid enters the repair liquid treatment device for recycling.

[0076] Further, the cyclic repair well repairs settlement. The outer pipe of the cyclic repair well injects the repair liquid into the repair area, and the repair liquid naturally settles. The cyclic repair well is hollow and connected to the cyclic extraction device, enters the repair liquid treatment device for separation and recovery, then is connected to the bubble repair liquid generating device, and then is connected to the cyclic repair well, and the repair is in a closed cycle.

[0077] Further, nano and / or micro-nano bubbles are used in the field of soil, groundwater, or comprehensive soil and groundwater pollution remediation for efficient, fast, and non-secondary pollution in-situ remediation. During the remediation process, the repair liquid is detected and treated, and the repair materials are recycled and continuously used. Pipeline circulation is used to recover, separate, and recycle the repair liquid; the adsorption material adsorbs the dissolved pollutants in the repair liquid; the filter material separates the solid and liquid, and the repair liquid is recycled after passing the detection; the cycle consists of repair liquid preparation, pressurization, injection, repair, extraction, treatment, detection, separation, reuse, and is cycled in sequence; the detection device (including the first repair liquid detection device and the second repair liquid detection device) is used to detect whether the pollution concentration, bubble content, and particle size in the repair liquid meet the standards for reuse. If the requirements are met, it is reused; if not, supplementary bubbles are used for cyclic use; the repair liquid disposal and reuse subsystem is used to filter and adsorb pollutants in the repair liquid, and the filtration system is used to separate the solid and liquid and compress and dehydrate the solid waste. The bubble repair liquid is connected to the pressurization device and the cyclic repair well in sequence and enters the polluted area for repair. The adsorption device is used to adsorb the pollutants in the repair liquid, and the adsorption material regeneration device (except for the relevant devices in the repair liquid circulation subsystem of the cyclic repair well) is used to remove and desorb the pollutants in the adsorption material.

[0078] Further, a detection device (including a first repair liquid detection device and a second repair liquid detection device) detects the content of pollutants and bubbles in the repair liquid. After the repair liquid enters the separation and treatment device, it meets the reuse standard and re-enters the bubble generation device for recycling.

[0079] Further, the repair liquid treatment device includes, but is not limited to, a filtering device, such as filtering with a filter screen, a filter membrane, etc.; using the centrifugal force generated by a centrifuge to separate components with different densities in the repair liquid; adding a precipitant to the repair liquid to precipitate some of the pollutants; for heavy metal leaching solutions, such as adding sodium sulfide (Na2S), heavy metal ions (such as mercury, cadmium, lead, etc.) can form sulfide precipitates. Using an adsorbent to adsorb pollutants in the repair liquid; using chemical treatment methods such as redox reactions and neutralization reactions to remove pollution; dehydrating and drying the solid impurities after filtration for centralized resource utilization.

[0080] Further, the polluted area includes polluted soil and / or polluted groundwater, and the polluted soil is distributed above the polluted groundwater.

[0081] Compared with the prior art, the present invention has the following beneficial effects:

[0082] 1) An in-situ bubble cyclic repair well for polluted soil and / or groundwater provided by the present technical solution. The cyclic repair well has flexibility, convenience, and controllability, and can adjust the repair strategy and resource allocation according to the actual pollution situation and repair requirements, improving the repair efficiency and effect. In the field of soil, groundwater, or soil and groundwater repair, traditional repair methods often require the demolition of buildings, which not only increases the difficulty and cost of repair but also may cause greater damage to the surrounding environment. However, the present invention can repair the polluted area without demolishing the building, greatly simplifying the repair process, reducing the repair cost, and having high economic efficiency and practicality. The characteristics of controllability, flexibility, low cost, and low pollution enable the present invention to adapt to different types of polluted areas and repair scenarios and have a wide application prospect.

[0083] 2) The application of an in-situ bubble cyclic repair well for polluted soil and / or groundwater provided by the present technical solution. The cyclic repair well repairs settlement. The outer pipe of the cyclic repair well injects the repair liquid into the repair area, and the repair liquid naturally settles. The inside of the cyclic repair well is empty and connected to a cyclic extraction device, enters the separation and recovery repair liquid treatment device, then is connected to the bubble repair liquid generation device, and then is connected to the cyclic repair well, and the repair is in a closed cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] Figure 1 It is a side schematic view of the in-situ bubble cyclic repair well for polluted soil and / or groundwater in the embodiment of the present invention.

[0085] Figure 2 A top view schematic diagram of the in-situ cyclic remediation well for contaminated soil and / or groundwater in the embodiments of the present invention.

[0086] Figure 3 An application schematic diagram of the in-situ cyclic remediation well for contaminated soil and / or groundwater in the embodiments of the present invention (a structural schematic diagram of the in-situ remediation system for the contaminated area).

[0087] Reference numerals in the figure:

[0088] 1. Gas generation device; 2. Bubble remediation liquid generation device; 3. Pressurization device; 4. Foam barrier device; 5. Barrier foam; 6. Cyclic remediation well; 601. Well head; 602. Sedimentation pipe; 603. Porous structure; 604. Branch pipe connection; 605. Cyclic remediation well branch pipe; 606. Link rod; 607. Outer well pipe; 608. Inner well pipe; 609. Well partition; 610. Branch well tip; 611. Well top port; 7. Cyclic extraction device; 8. First remediation liquid detection device; 9. Remediation liquid treatment device; 10. Second remediation liquid detection device; 11. Purification material recycling device; 12. Solid waste resource utilization device; 13. First separated solid; 14. Separated gas; 15. Gas purification device; 16. Gas cyclic recycling; 17. Second separated solid; 18. Separated liquid; 19. Contaminated soil; 20. Contaminated groundwater. Detailed implementation manners

[0089] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Features such as component models, material names, connection structures, control methods, algorithms, etc. that are not clearly described in the present technical solution are regarded as common technical features disclosed in the prior art.

[0090] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0091] It should be noted that in the present invention, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0092] The following further elaborates on the content of the present invention in conjunction with specific embodiments.

[0093] Embodiment 1

[0094] As Figures 1-2 shown, this embodiment provides an in-situ cyclic remediation well with bubbles for contaminated soil and / or groundwater. The cyclic remediation well 6 includes a well head 601, a sedimentation pipe 602, a porous structure 603, a branch pipe connection 604, a cyclic remediation well branch pipe 605, a connecting rod 606, an outer well pipe 607, an inner well pipe 608, a well partition 609, a branch pipe well tip 610, and a well top port 611.

[0095] The inner well pipe 608 is arranged at the rear end of the cyclic remediation well 6;

[0096] The outer well pipe 607 is sleeved outside the inner well pipe 608;

[0097] The well head 601 is arranged at the front end (bottom) of the cyclic remediation well 6; the well head 601 is wedge-shaped and is used to insert into the contaminated soil and / or groundwater area;

[0098] The porous structure 603 is arranged between the well head 601 and the inner well pipe 608;

[0099] The cyclic remediation well branch pipe 605 is connected to the outer well pipe 607, and the outer well pipe 607 injects the bubble remediation liquid into the soil or groundwater contamination area through the cyclic remediation well branch pipe 605;

[0100] The branch pipe connection 604 connects the cyclic remediation well branch pipe 605 and the outer well pipe 607. The branch pipe connection 604 is used to connect the cyclic remediation well branch pipe 605 and the outer well pipe 607 to allow the bubble remediation liquid to pass through, and to adjust the position and angle of the cyclic remediation well branch pipe 605 as the remediation depth changes;

[0101] The sedimentation pipe 602 is arranged at the lower end of the well head 601;

[0102] The link rod 606 is connected to the sedimentation pipe 602, and the link rod 606 is used to extract the sedimentation pipe 602 for removing sediments;

[0103] The well partition 609 is used to isolate the injection area and the recovery area of the repair fluid. The outer well pipe 607 is similar to an intermediate casing. The inside of the casing is the bubble repair fluid, and the inner pipe is for extracting groundwater. The well partition 609 is a partition layer that physically separates the bottom of the casing from the porous structure 603. Above the partition layer is the bubble repair fluid, and below the partition layer is the porous structure 603, which is used to extract groundwater and the used repair fluid;

[0104] A well partition 609 is provided between the inner well pipe 608 and the porous structure 603, and a well partition 609 is provided between the well head 601 and the porous structure 603;

[0105] The branch well tip 610 is connected to the branch pipe of the circulating repair well 605. The branch well tip 610 is provided at the end of the branch pipe of the circulating repair well 605 and is used to assist the branch pipe of the circulating repair well 605 to enter different repair areas;

[0106] The well top port 611 is provided at the rear ends of the outer well pipe 607 and the inner well pipe 608. The well top port 611 is used to assist in lifting the circulating repair well 6. The outer well pipe 607 of the circulating repair well 6 is connected to the branch pipe of the circulating repair well 605. When the branch pipe of the circulating repair well 605 is pressed into the repair area, the branch pipe of the circulating repair well 605 is joined and closely attached to the outer well pipe 607 through the branch link 604 and inserted into the polluted area. During the upward movement of the circulating repair well, the branch pipe of the circulating repair well 605 is driven to horizontally insert into the repair area;

[0107] The well top port 611 is provided at the upper end of the circulating repair well. By lifting the well top port 611 of the circulating repair well, the whole circulating repair well moves upward;

[0108] During the upward movement of the circulating repair well, the branch well tip 610 of the branch pipe of the circulating repair well 605 drives the branch pipe of the circulating repair well 605 to horizontally expand.

[0109] Multiple circulating repair wells are combined or used separately according to the scope of the polluted area. The multi-functional main pipe of the circulating repair well (including the outer well pipe 607 and the inner well pipe 608) and its branch pipes (the branch pipes of the circulating repair well 605) horizontally expand to form a longitudinal and transverse spatial three-dimensional repair area network.

[0110] The end of the branch pipe of the circulating repair well 605 is rotatably connected to the outer well pipe 607 through the branch link 604;

[0111] Multiple groups of branch pipes of the circulating repair well 605 are provided along the axial direction of the outer well pipe 607;

[0112] A plurality of the looped repair well branch pipes 605 in each group of looped repair well branch pipes 605 are arranged circumferentially and uniformly around the outer well pipe 607.

[0113] The branch pipe connection 604 includes a connecting hose. The two ends of the connecting hose are respectively connected to the looped repair well branch pipe 605 and the outer well pipe 607. The connecting hose connects the looped repair well branch pipe 605 and the outer well pipe 607 to introduce the bubble repair liquid in the outer well pipe 607 into the looped repair well branch pipe 605.

[0114] Both the looped repair well branch pipe 605 and the outer well pipe 607 include an inner hose and an outer rigid pipe (the outer part is a rigid connection for support, and the inner part is a hose connection for the liquid passage). The branch pipe connection 604 includes a connecting hose and a hinge seat. The inner hose is connected and communicated with the connecting hose in the branch pipe connection 604. The outer rigid pipe of the looped repair well branch pipe 605 is hinged to the hinge seat, and the hinge seat is fixedly connected to the outer well pipe 607.

[0115] The outlet of the outer well pipe 607 of the looped repair well 6, the outlet of the looped repair well branch pipe 605, and the top of the looped repair well are of a porous structure. Figure 1 、 2 The slanted shaded part is a porous channel for liquid flow. The porous structure is basically the same as the porous structure 603 for the flow of the repair liquid and groundwater. The outer well pipe 607 and the looped repair well branch pipe 605 disperse the repair liquid into the repair area. The porous filter at the top of the looped repair well is used to prevent solid impurities in the extracted repair liquid from entering the circulation system.

[0116] The looped repair well 6 is drilled to the repair depth. The main pipes (including the outer well pipe 607 and the inner well pipe 608) are vertically inserted into the repair area for longitudinal repair, and the branch pipes (looped repair well branch pipes 605) are horizontally extended for horizontal repair. A three-dimensional looped repair system is formed by extraction at the bottom of the repair well. The looped repair well is divided into an outer well pipe 607 and an inner well pipe 608. The outer well pipe 607 is used to inject the repair liquid into the polluted area, and the inner well pipe 608 extracts and filters the repair liquid through the bottom of the wellhead (wellhead 601). After the repair liquid repairs the soil and groundwater, the repair liquid is recycled through bubble generation after extraction treatment.

[0117] The repair liquid enters the polluted area through the main pipes (including the outer well pipe 607 and the inner well pipe 608) and branch pipes (looped repair well branch pipes 605) of the looped repair well, and the repair liquid repairs from top to bottom under the action of gravity.

[0118] A porous structure 603 is provided at the upper end of the wellhead 601 for the extraction device to extract and recycle the repair liquid. The porous structure 603 is used to filter large particle impurities.

[0119] A sedimentation pipe 602 is provided at the bottom end of the cyclic repair well to collect accumulated fine particle impurities. The sedimentation pipe 602 is connected by a connecting rod 606 to remove sediment in the well.

[0120] A partition (well partition 609) is provided in the repair well to isolate the repair fluid injection area and the repair fluid recovery area, preventing the mixing of repair fluids.

[0121] Embodiment 2

[0122] As Figures 1-3 shown, this embodiment provides an application of an in-situ cyclic repair well for contaminated soil and / or groundwater with bubbles. The in-situ cyclic repair well for contaminated soil and / or groundwater in Embodiment 1 is used in an in-situ repair system for contaminated areas to achieve the pollution repair of contaminated soil and / or groundwater areas.

[0123] The in-situ cyclic repair well for contaminated soil and / or groundwater with bubbles is used in an in-situ repair system for contaminated areas to achieve the pollution repair of contaminated soil and / or groundwater areas.

[0124] The cyclic repair well 6 and the application method thereof can repair heavy metals, organic substances or comprehensive heavy metal-organic pollutants simultaneously or separately, reducing the amount of repair fluid used while reducing the repair cost. Each unit can be independently applied to small-scale contaminated areas, or multiple units can be combined for the repair of large-scale areas.

[0125] The in-situ cyclic repair of nano- and / or micro-nano bubbles for contaminated soil and / or groundwater and the in-situ repair system for contaminated areas are applied to the repair of contaminated soil, groundwater alone or comprehensive soil and groundwater pollution. During the in-situ repair process of contaminated areas, heavy metals, organic substances or comprehensive heavy metal-organic pollutants can be repaired simultaneously or separately.

[0126] The in-situ repair system for contaminated areas includes a bubble repair fluid generation subsystem, a repair fluid circulation subsystem, and a foam barrier subsystem;

[0127] The repair fluid circulation subsystem includes a cyclic repair well 6;

[0128] The cyclic repair well 6 is connected to the contaminated area;

[0129] The bubble repair fluid generation subsystem is connected to the repair fluid circulation subsystem;

[0130] The bubble repair fluid generation subsystem is used to generate nano- and / or micro-nano bubbles through repair fluid and gas to adsorb and degrade pollutants in the contaminated soil and / or groundwater area;

[0131] The repair fluid circulation subsystem is used to continuously circulate and transport the repair fluid to the contaminated soil and / or groundwater area;

[0132] The foam barrier subsystem is connected to the contaminated area and is used to generate foam on the surface, longitudinally, and at the bottom of the soil and / or groundwater contaminated area to form an all-round contaminated foam barrier layer.

[0133] The bubble remediation liquid generation subsystem includes a gas generation device 1, a bubble remediation liquid generation device 2, and a pressurization device 3;

[0134] The gas generation device 1 is connected to the bubble remediation liquid generation device 2;

[0135] The pressurization device 3 is connected to the bubble remediation liquid generation device 2, and the pressurization device 3 is connected to the circulation remediation well 6. The pressurization device 3 is used to introduce the formulated bubble remediation liquid generated by the bubble remediation liquid generation device 2 into the contaminated area through the circulation remediation well 6.

[0136] The remediation gas includes, but is not limited to, ozone, oxygen, carbon dioxide, air, etc. for preparing nano- and / or micro-nano bubble remediation liquid.

[0137] The circulation remediation well 6 transports the bubble remediation liquid horizontally and vertically to the remediation range. The inside of the circulation remediation well 6 is hollow for extracting the remediated bubble remediation liquid for recycling.

[0138] The bubble remediation liquid generation device 2 includes, but is not limited to, one or more of the following methods: pressure dissolution gas decompression gas release type, pressure dissolution gas impeller gas dispersion type, swirling liquid flow type, fine pore type, static mixer type, mixed steam direct contact condensation type, ultrasonic cavitation type, spiral cavitation type.

[0139] The particle size range of nano-bubbles is between 20 - 500 nm, and the particle size range of micro-nano bubbles is between 100 nm - 100 μm.

[0140] The gas generation device 1 is used to generate gases (such as ozone, oxygen, carbon dioxide, air, etc.) for the remediation of soil, groundwater, or combined soil and groundwater pollution. The remediation liquid is injected into the contaminated soil and groundwater area through the circulation remediation well 6 by means of a pressurization device 3 (high-pressure pump), a flow meter, and a diverter valve. The generation device generates remediation nano- and / or micro-nano bubbles, which are transported through pipelines to the circulation remediation well and injected into the contaminated area as the remediation liquid for pollution remediation. The remediation and extraction are carried out simultaneously and recycled after treatment. The nano- and / or micro-nano bubbles can adsorb the pollutants in the contaminated area on their surface or decompose the pollutants through redox reactions, and then the treated water and pollutants are carried out together with the pumping process to achieve the purpose of remediation. The remediation gas is generated by the bubble generation device as nano- and / or micro-nano bubble remediation liquid, longitudinally injected into the contaminated depth of the contaminated soil or groundwater to be remediated through the drilling well of the circulation remediation well (including the outer pipe 607 and the inner pipe 608 of the well), and laterally injected into the contaminated range of the soil or groundwater to be remediated through the drilling branch pipe (the branch pipe 605 of the circulation remediation well).

[0141] During the pressurization and extraction of nano- and / or micro-nano bubbles, parameters such as pressure and temperature need to be precisely controlled. Minor changes in the parameters may affect the generation quantity, size, and stability of nano-bubbles. The pressurization process can also change the internal pressure and gas concentration of nano- and / or micro-nano bubbles. Appropriate pressurization can make the size of nano-bubbles more uniform, increase the stability of nano- and / or micro-nano bubbles in the liquid, enable gas molecules to be more tightly packed inside the bubbles, and also make the charge distribution on the bubble surface more stable.

[0142] The foam barrier subsystem includes a foam barrier device 4 and a barrier foam 5;

[0143] The foam barrier device 4 is connected to the contaminated soil 19. The foam barrier device 4 is used to generate the barrier foam 5 and inject the barrier foam 5 into the pores of the contaminated soil 19 in the contaminated area.

[0144] The foam barrier device 4 is used to generate the barrier foam 5. The barrier foam 5 can fill the voids in the soil pores to block the migration of soil and groundwater pollutants. Adsorbents and reactive materials are added to the foam. The adsorbents include, but are not limited to, activated carbon, bentonite, etc., which can adsorb heavy metal ions and organic pollutants in soil and groundwater. The reactive substances in the foam can chemically react with the pollutants. For example, the foam containing oxidation reagents can undergo redox reactions with reducing pollutants such as sulfides in groundwater to convert harmful pollutants into relatively harmless substances. For some organic pollutants, microorganisms or enzymes in the foam can catalyze the degradation reaction to decompose the pollutants. Chelating agents are added to the foam material, and this chelating agent can form stable complexes with heavy metal ions to fix the heavy metals and prevent their migration.

[0145] The foam barrier subsystem connected to the cyclic repair well 6 prepares barrier foam and injects it into the voids in the underground filled soil pores. The barrier foam is sprayed on the ground surface and longitudinally and bottom-injected into the flexible barrier layer to form a three-dimensional spatial barrier. Adsorbents, reactive materials, microorganisms, or enzymes are added to the foam material to repair heavy metal ions and organic pollutants in the polluted area. Adsorbents such as activated carbon and bentonite can adsorb heavy metal ions and organic pollutants in soil and groundwater. Reactive materials can undergo chemical reactions with pollutants to complete the chemical repair process. Foam containing oxidation reagents can undergo redox reactions with reducing pollutants such as sulfides in groundwater to convert harmful pollutants into relatively harmless substances. Adding microorganisms or enzymes can catalyze degradation reactions to decompose pollutants. Chelating agents are added to the foam material, and these chelating agents can form stable complexes with heavy metal ions, thereby fixing the heavy metals and preventing their migration.

[0146] The foam barrier subsystem is used to generate barrier foam that can fill the voids in soil pores, forming a flexible physical barrier to block the migration of pollutants in soil and groundwater. The foam barrier device 4, namely the foam generator, can be used for surface barrier, longitudinal barrier, and bottom barrier of the pollution range. The barrier foam is sprayed on the polluted area using the foam barrier process. The range and spraying thickness of the barrier are selected according to needs to comprehensively block the pollution and the overflow of the repair liquid. Adsorbents and reactive materials are added to the foam. Adsorbents such as activated carbon and bentonite can adsorb heavy metal ions and organic pollutants in soil and groundwater, and the reactive substances in the foam can undergo chemical reactions with pollutants to complete the chemical repair process. Foam containing oxidation reagents can undergo redox reactions with reducing pollutants such as sulfides in groundwater to convert harmful pollutants into relatively harmless substances. Microorganisms or enzymes in the foam can catalyze degradation reactions to decompose organic pollutants. The foam barrier confines the repair liquid within the repair range area, reducing the repair cost and preventing secondary pollution.

[0147] The repair liquid circulation subsystem further includes a cyclic extraction device 7, a first repair liquid detection device 8, a repair liquid treatment device 9, a second repair liquid detection device 10, a purification material recycling device 11, a solid waste resource utilization device 12, and a gas purification device 15;

[0148] The cyclic extraction device 7 is connected to the cyclic repair well 6. The cyclic extraction device 7 extracts the bubble repair liquid through the porous structure 603 of the cyclic repair well 6 and is used to extract the repaired bubble repair liquid from the inner pipe 608 of the cyclic repair well 6 and then send it to the first repair liquid detection device 8;

[0149] The first repair fluid detection device 8 is connected to the circulating extraction device 7, and the first repair fluid detection device 8 is connected to the repair fluid treatment device 9;

[0150] The repair fluid treatment device 9 is connected to the second repair fluid detection device 10, the repair fluid treatment device 9 is connected to the purification material reuse device 11, the repair fluid treatment device 9 is connected to the solid waste resource utilization device 12, and the repair fluid treatment device 9 is connected to the gas purification device 15;

[0151] The gas purification device 15 is connected to the bubble repair fluid generating device 2, and the gas purification device 15 is connected to the solid waste resource utilization device 12;

[0152] The repair fluid treatment device 9 is used to separate the repair fluid, pollutants, and solid impurities, and obtain the first separated solid 13, separated gas 14, and purification material. The first separated solid 13 enters the solid waste resource utilization device 12 for recycling. The purification material is reused through the purification material reuse device 11, and the reused purification material returns to the repair fluid treatment device 9. The solid impurities are dehydrated and dried in the purification material reuse device 11 and then enter the solid waste resource utilization device 12 for centralized resource utilization. The separated gas 14 enters the gas purification device 15 for gas purification, and the obtained purified gas enters the bubble repair fluid generating device 2 for gas recycling and reuse 16. The obtained second separated solid 17 enters the solid waste resource utilization device 12 for recycling, and the obtained separated liquid 18 enters the repair fluid treatment device 9 for recycling and reuse.

[0153] The circulating repair well 6 repairs settlement. The outer pipe 607 of the circulating repair well 6 injects the repair fluid into the repair area, and the repair fluid naturally settles. The circulating repair well 6 is hollow and connected to the circulating extraction device 7, enters the separated and recycled repair fluid treatment device 9, then is connected to the bubble repair fluid generating device 2, and then is connected to the circulating repair well 6, and the repair is in a closed cycle.

[0154] Nano- and / or micro-nano bubbles are used in the field of soil, groundwater or comprehensive soil and groundwater pollution remediation for efficient, rapid and non-secondary-pollution in-situ remediation. During the remediation process, the remediation liquid is detected and treated, and the remediation materials are recycled and continuously used. Pipeline circulation is used to recover, separate and recycle the remediation liquid; the adsorption material adsorbs the dissolved pollutants in the remediation liquid; the filtering material separates solids from liquids, and the remediation liquid is recycled after passing the detection; the circulation includes the preparation, pressurization, injection, remediation, extraction, treatment, detection, separation and reuse of the remediation liquid, and the cycle is repeated in sequence; the detection device (including the first remediation liquid detection device 8 and the second remediation liquid detection device 10) is used to detect whether the pollution concentration, bubble content and particle size in the remediation liquid meet the standards for reuse. If the requirements are met, it is reused; if not, bubbles are supplemented and recycled; the remediation liquid disposal and reuse subsystem is used to filter and adsorb pollutants in the remediation liquid, and the filtering system is used to separate solids from liquids and compress and dehydrate solid waste. The bubble remediation liquid is connected to the pressurization device and the circulating workover well in sequence and enters the polluted area for remediation. The adsorption device is used to adsorb pollutants in the remediation liquid, and the adsorption material regeneration device (except for the relevant devices in the remediation liquid circulation subsystem of the circulating workover well 6) is used to remove and desorb the pollutants in the adsorption material.

[0155] The detection device (including the first remediation liquid detection device 8 and the second remediation liquid detection device 10) detects the pollutants and bubble content in the remediation liquid. After the remediation liquid enters the separation and treatment device, it meets the reuse standard and re-enters the bubble generation device for recycling.

[0156] The remediation liquid treatment device 9 includes but is not limited to filtering devices such as filter screens and filter membranes for filtering; using the centrifugal force generated by a centrifuge to separate components of different densities in the remediation liquid; adding a precipitant to the remediation liquid to precipitate some of the pollutants; for heavy metal leaching solutions, such as adding sodium sulfide (Na2S), heavy metal ions (such as mercury, cadmium, lead, etc.) can form sulfide precipitates. Using adsorbents to adsorb pollutants in the remediation liquid; using chemical treatment methods such as redox reactions and neutralization reactions to remove pollution; dehydrating and drying the solid impurities after filtering for centralized resource utilization. The remediation liquid treatment device includes a centrifuge, which uses the centrifugal force generated by the centrifuge to separate components of different densities in the remediation liquid; adding a precipitant to the remediation liquid to precipitate the pollutants; for heavy metal leaching solutions, such as adding sodium sulfide (Na2S), heavy metal ions (such as mercury, cadmium, lead, etc.) can form sulfide precipitates. Using adsorbents to adsorb pollutants in the remediation liquid; using chemical treatment methods such as redox reactions and neutralization reactions to remove pollution; the first separated solid 13 in the remediation liquid enters the solid waste resource utilization device 12 for recycling, the purified remediation liquid material is reused through the purified material reuse device 11, and the solid impurities after filtering are dehydrated and dried and centrally enter the solid waste resource utilization device 12 for resource utilization.

[0157] The separated gas 14 in the repair liquid enters the gas purification device 15, the separated liquid 18 returns to the repair liquid treatment device 9, the second separated solid 17 enters the solid waste resource utilization device 12 for recycling, and the gas purified by the gas purification device 15 enters the bubble repair liquid generating device 2 for gas recycling and reuse 16.

[0158] In this embodiment, the polluted area includes polluted soil 19 and polluted groundwater 20. The polluted soil 19 is distributed above the polluted groundwater 20, and the circulation repair well 6 is inserted into the polluted soil 19 and the polluted groundwater 20.

[0159] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present invention is not limited to the above embodiments, and all improvements and modifications made by those skilled in the art without departing from the scope of the present invention according to the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. An in-situ cyclic remediation well with bubbles for contaminated soil and / or groundwater, characterized in that, The described circulation repair well (6) includes: An inner well pipe (608), which is arranged at the rear end of the circulation repair well (6); An outer well pipe (607), which is sleeved outside the inner well pipe (608); A well head (601), which is arranged at the front end of the circulation repair well (6); A porous structure (603), which is arranged between the well head (601) and the inner well pipe (608); A circulation repair well branch pipe (605), which is connected to the outer well pipe (607). The outer well pipe (607) injects the bubble repair liquid into the soil or groundwater pollution area through the circulation repair well branch pipe (605); A branch pipe connection (604), which connects the circulation repair well branch pipe (605) and the outer well pipe (607). The branch pipe connection (604) is used to connect the circulation repair well branch pipe (605) and the outer well pipe (607) to allow the passage of the bubble repair liquid, and to adjust the position and angle of the circulation repair well branch pipe (605) as the repair depth changes.

2. The in-situ bubble cyclic remediation well for contaminated soil and / or groundwater according to claim 1, wherein The circulation repair well (6) further includes: A sedimentation pipe (602), which is arranged at the lower end of the well head (601); A connecting rod (606), which is connected to the sedimentation pipe (602). The connecting rod (606) is used to extract the sedimentation pipe (602) to remove sediments.

3. The in-situ cyclic remediation well for contaminated soil and / or groundwater according to claim 1, wherein The circulation repair well (6) further includes: A well partition (609), which is used to isolate the repair liquid injection area and the repair liquid recovery area; A well partition (609) is arranged between the inner well pipe (608) and the porous structure (603), and a well partition (609) is arranged between the well head (601) and the porous structure (603).

4. A bubble in-situ cyclic remediation well for contaminated soil and / or groundwater according to claim 1, characterized in that, The circulation repair well (6) further includes: A branch pipe well tip (610), which is connected to the circulation repair well branch pipe (605). The branch pipe well tip (610) is arranged at the end of the circulation repair well branch pipe (605) and is used to assist the circulation repair well branch pipe (605) to enter different repair areas; A well top port (611), which is arranged at the rear ends of the outer well pipe (607) and the inner well pipe (608). The well top port (611) is used to assist in lifting the circulation repair well (6).

5. A bubble in-situ circulation remediation well for contaminated soil and / or groundwater according to claim 1, characterized in that, The end of the circulation repair well branch pipe (605) is rotatably connected to the outer well pipe (607) through the branch pipe connection (604); Multiple groups of circulation repair well branch pipes (605) are arranged along the axial direction of the outer well pipe (607); Multiple circulation repair well branch pipes (605) in each group of circulation repair well branch pipes (605) are evenly distributed along the circumferential direction of the outer well pipe (607); The branch pipe connection (604) includes a connecting hose. The two ends of the connecting hose are respectively connected to the circulation repair well branch pipe (605) and the outer well pipe (607). The connecting hose connects the circulation repair well branch pipe (605) and the outer well pipe (607) to allow the bubble repair liquid in the outer well pipe (607) to pass into the circulation repair well branch pipe (605).

6. Use of a bubble in-situ cyclic remediation well for contaminated soil and / or groundwater as described in any one of claims 1-5, characterized in that, The in-situ cyclic remediation well for polluted soil and / or groundwater is used for the remediation of polluted areas of soil and / or groundwater.

7. Use of an in-situ cyclic remediation well with bubbles for contaminated soil and / or groundwater according to claim 6, characterized in that The in-situ cyclic remediation well for polluted soil and / or groundwater is used in an in-situ remediation system for a polluted area to achieve the remediation of polluted areas of soil and / or groundwater; The in-situ remediation system for the polluted area includes a bubble remediation liquid generation subsystem, a remediation liquid circulation subsystem, and a foam barrier subsystem; The remediation liquid circulation subsystem includes a circulation remediation well (6); The circulation remediation well (6) is connected to the polluted area; The bubble remediation liquid generation subsystem is connected to the remediation liquid circulation subsystem; The bubble remediation liquid generation subsystem is used to generate nano- and / or micro-nano bubbles through the remediation liquid and gas to adsorb and degrade pollutants in the polluted area of soil and / or groundwater; The remediation liquid circulation subsystem is used to continuously circulate and transport the remediation liquid to the polluted area of soil and / or groundwater; The foam barrier subsystem is connected to the polluted area, and the foam barrier subsystem is used to generate foam in the polluted area of soil and / or groundwater to form a polluted foam barrier layer.

8. Use of an in-situ cyclic remediation well with bubbles for contaminated soil and / or groundwater, characterized in that, The bubble remediation liquid generation subsystem includes a gas generation device (1), a bubble remediation liquid generation device (2), and a pressurization device (3); The gas generation device (1) is connected to the bubble remediation liquid generation device (2); The pressurization device (3) is connected to the bubble remediation liquid generation device (2), the pressurization device (3) is connected to the circulation remediation well (6), and the pressurization device (3) is used to send the bubble remediation liquid generated by the bubble remediation liquid generation device (2) into the polluted area through the circulation remediation well (6).

9. Use of an in-situ cyclic remediation well with bubbles for contaminated soil and / or groundwater, characterized in that, The foam barrier subsystem includes a foam barrier device (4) and a barrier foam (5); The foam barrier device (4) is connected to the polluted soil (19), and the foam barrier device (4) is used to generate the barrier foam (5) and inject the barrier foam (5) into the polluted area.

10. Application of a bubble in-situ cyclic remediation well for contaminated soil and / or groundwater according to claim 7, characterized in that, The remediation liquid circulation subsystem further includes a circulation extraction device (7), a first remediation liquid detection device (8), a remediation liquid treatment device (9), a second remediation liquid detection device (10), a purification material reuse device (11), a solid waste resource utilization device (12), and a gas purification device (15); The circulation extraction device (7) is connected to the circulation remediation well (6), and the circulation extraction device (7) extracts the bubble remediation liquid through the porous structure (603) of the circulation remediation well (6). The circulation extraction device (7) is used to extract the remediated bubble remediation liquid from the well inner pipe (608) of the circulation remediation well (6) and send it to the first remediation liquid detection device (8); The first remediation liquid detection device (8) is connected to the circulation extraction device (7), and the first remediation liquid detection device (8) is connected to the remediation liquid treatment device (9); The remediation liquid treatment device (9) is connected to the second remediation liquid detection device (10), the remediation liquid treatment device (9) is connected to the purification material reuse device (11), the remediation liquid treatment device (9) is connected to the solid waste resource utilization device (12), and the remediation liquid treatment device (9) is connected to the gas purification device (15); The gas purification device (15) is connected to the bubble repair liquid generating device (2), and the gas purification device (15) is connected to the solid waste resource utilization device (12); The repair liquid treatment device (9) is used to separate the repair liquid, pollutants, and solid impurities, and obtain the first separated solid (13), separated gas (14), and purification material. The first separated solid (13) enters the solid waste resource utilization device (12) for recycling. The purification material is reused through the purification material reuse device (11), and the reused purification material returns to the repair liquid treatment device (9). After filtration in the purification material reuse device (11), the solid impurities are dehydrated and dried and enter the solid waste resource utilization device (12) for centralized resource utilization. The separated gas (14) enters the gas purification device (15) for gas purification, and the obtained purified gas enters the bubble repair liquid generating device (2) for gas cycle reuse (16). The obtained second separated solid (17) enters the solid waste resource utilization device (12) for recycling, and the obtained separated liquid (18) enters the repair liquid treatment device (9) for recycling and reuse.

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