An in-situ remediation device for water body substrate soil

Abstract

The present application belongs to the technical field of water body foundation soil pollution remediation, and particularly relates to a water body foundation soil in-situ remediation device.The technical scheme is as follows: a water body foundation soil in-situ remediation device, comprising a pretreatment module for treating upper water body, and a plurality of stirring devices for crushing water body bottom foundation soil body are installed at the bottom of the pretreatment module; and a deep treatment module for treating water body after the soil body is crushed by the stirring devices is further included.The present application provides a water body foundation soil in-situ remediation device for complex pollution conditions and combining multiple remediation technologies.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of water body substrate soil pollution remediation, and particularly relates to a water body substrate soil in-situ remediation device. BACKGROUND

[0002] Water body substrate soil refers to the soil deposited at the bottom of a water body, which is influenced by both the water body and the land, and is seriously polluted. Water body substrate soil pollution mainly includes heavy metal pollution, organic pollutant pollution, and acid pollution, etc. Common water body substrate soil pollution includes: 1) heavy metal pollution, which is the main type of water body substrate soil pollution. Heavy metals mainly come from human activities, such as industrial wastewater discharge, pesticide and fertilizer use, mining, etc. Heavy metal pollution can cause serious damage to the water ecosystem and enter the human body through the food chain, endangering human health. 2) organic pollutant pollution, which includes petroleum, pesticides, fertilizers, and organic industrial waste, etc. Organic pollutants can destroy the ecological balance of the water body and harm human health.

[0003] Water body substrate soil pollution can cause serious harm to the water ecosystem, crop production, and human health. 1) Water body substrate soil pollution can destroy the water ecosystem, leading to the death of fish and other aquatic organisms. 2) Water body substrate soil pollution can contaminate crops, resulting in excessive heavy metals and organic pollutants in agricultural products. 3) Water body substrate soil pollution can enter the human body through the food chain, leading to heavy metal poisoning and cancer and other diseases in the human body.

[0004] At present, common methods for water body substrate soil pollution remediation include:

[0005] 1) Physical remediation technology:

[0006] Dredging: contaminated sediment is excavated by mechanical equipment and treated or disposed of. It is suitable for areas with serious pollution, but the cost is high and can easily cause secondary pollution.

[0007] Covering: a layer of clean soil, sand, or other materials is covered on the contaminated sediment to isolate pollutants. It is suitable for areas with low or stable pollution.

[0008] Solidification / stabilization: by adding solidification agents, pollutants are fixed in soil particles, reducing their migration and release. It is suitable for heavy metal contaminated soil.

[0009] 2) Chemical remediation technology:

[0010] Chemical oxidation-reduction: by adding oxidizing or reducing agents, toxic pollutants are converted into non-toxic or low-toxic substances. For example, hydrogen peroxide, ozone, etc. are used to treat organic pollutants.

[0011] Chemical precipitation: By adding chemical reagents, dissolved pollutants are converted into insoluble precipitates, reducing their bioavailability. For example, by adding lime, phosphate, etc., heavy metals form insoluble compounds.

[0012] Adsorption: Using activated carbon, zeolite, and other adsorbent materials, pollutants are removed from water. Suitable for a variety of organic pollutants and some heavy metals.

[0013] 3) Bioremediation technology:

[0014] Biodegradation: Using microorganisms to degrade organic pollutants. By introducing specific microbial strains or activating the original microbial community, the degradation of organic pollutants can be accelerated.

[0015] Phytoremediation: Using aquatic plants to absorb and accumulate pollutants. Suitable for slightly polluted water bodies, by planting water hyacinth, reed and other plants, part of the heavy metals and organic pollutants can be removed.

[0016] Bioaugmentation: By adding nutrients or electron acceptors, the metabolic activity of microorganisms is enhanced, promoting the degradation of pollutants.

[0017] However, the use of the above repair technology alone usually requires large investment in manpower, materials and machines, and is easy to produce waste with high toxicity, causing secondary pollution.

[0018] In recent years, integrated remediation technology has been increasingly applied to water body foundation improvement projects. For example:

[0019] 1) Ecological restoration: Combining various biological, physical and chemical methods to restore the balance of water ecosystem. For example, through dredging, covering, phytoremediation and other comprehensive measures, not only pollutants are removed, but also ecological environment is improved.

[0020] 2) In-situ remediation: Without excavating the bottom mud, by adding remediation materials (such as activated carbon, microbial inoculum, etc.) and using devices for mixing and stirring, pollutants are degraded or fixed in-situ.

[0021] Although the current water body foundation soil treatment method has achieved certain results in pollution control, there are still problems such as high cost, secondary pollution, low efficiency and difficult monitoring.

[0022] In summary, the current conventional water body foundation soil treatment method has the following problems:

[0023] 1) High cost:

[0024] Dredging: The cost of mechanical dredging and disposal of contaminated bottom mud is very high, especially for large areas of contaminated areas.

[0025] Chemical remediation: The use of chemical reagents is costly and requires precise control of dosage and reaction conditions.

[0026] 2) Secondary pollution:

[0027] Dredging: The dredging process may cause pollutants to be resuspended in the water, resulting in secondary pollution.

[0028] Chemical remediation: Improper use of chemical reagents may lead to the formation of new contaminants or the accumulation of byproducts.

[0029] 3) Inconsistent efficiency and effectiveness:

[0030] Bioremediation: It is greatly affected by environmental conditions, such as temperature, pH value and oxygen concentration, resulting in unstable remediation efficiency and effect.

[0031] Phytoremediation: Plants absorb pollutants slowly and have limited effectiveness in highly polluted areas.

[0032] 4) Monitoring and control are difficult:

[0033] Real-time monitoring and control of the remediation process is challenging, making it difficult to accurately assess the remediation effectiveness and the removal rate of pollutants.

[0034] 5) Limited scope of application:

[0035] Each method has its specific scope of application, and a single method is insufficient to cope with complex and diverse pollution situations. Summary of the Invention

[0036] In order to solve the above-mentioned problems in the existing technology, the purpose of this invention is to provide an in-situ remediation device for water body substrate soil that combines multiple remediation technologies for complex pollution situations.

[0037] The technical solution adopted in this invention is as follows:

[0038] An in-situ remediation device for water body substrate soil includes a pretreatment module for treating the upper water body, and a plurality of mixing devices for breaking the bottom substrate soil of the water body are installed at the bottom of the pretreatment module; it also includes a deep treatment module for treating the water body after the soil is broken by the mixing devices.

[0039] The pretreatment module of this invention can treat water containing low concentrations of aquatic substrate matrix through ozone aeration, air aeration, oxidation, and photocatalytic reactions, and the treated water is discharged in situ. The stirring device can break up the underlying substrate soil of the water body, and the deep treatment module separates the water containing high concentrations of aquatic substrate matrix produced after the breakup. The separated concentrated mud and water are then separately treated for remediation, and discharged in situ after treatment. This invention provides a comprehensive treatment plan for complex pollution situations, combining multiple remediation technologies and measures to ensure comprehensive and effective pollution control.

[0040] This invention develops a low-cost, high-efficiency combination of remediation technologies. It combines physical, chemical, and biological remediation methods, leveraging their respective advantages to reduce overall costs. This invention also develops environmentally friendly chemical reagents to reduce secondary pollution and byproducts. Furthermore, this invention addresses the solid-liquid-gas mixture generated during water body substrate remediation by introducing advanced oxidation technology to enhance overall removal efficiency. Finally, this invention incorporates automated control technology to precisely regulate various parameters throughout the remediation process.

[0041] As a preferred embodiment of the present invention, the pretreatment module includes a pretreatment chamber, which contains a lower inlet mixing chamber and an upper ultraviolet reaction chamber. An inlet module is installed on the lower inlet mixing chamber, which also contains an ozone aeration pipe, an oxidant solution diffusion pipe, and an air aeration pipe. A water distribution structure for transporting water from the lower inlet mixing chamber to the upper ultraviolet reaction chamber is installed between the lower inlet mixing chamber and the upper ultraviolet reaction chamber. An ultraviolet excitation device is installed in the upper ultraviolet reaction chamber, and a pretreatment outlet is provided on the upper ultraviolet reaction chamber.

[0042] After the inlet module pumps external water into the lower inlet mixing chamber, the ozone aeration pipe aerates the water with ozone, the oxidant solution diffusion pipe diffuses the oxidant to oxidize pollutants in the water, and the air aeration pipe aerates the water with air. The treated water is then pumped to the upper ultraviolet reaction chamber by the water distribution structure, where the ultraviolet excitation device irradiates the water with ultraviolet light for further treatment. The treated water is then discharged in situ.

[0043] As a preferred embodiment of the present invention, the number of pretreatment chambers is at least two, a flexible frame is connected between adjacent pretreatment chambers, a flexible cable is connected between the ultraviolet excitation devices of adjacent pretreatment chambers, an ozone flexible connecting pipe is connected between the ozone aeration pipes of adjacent pretreatment chambers, an oxidant solution flexible connecting pipe is connected between the oxidant solution diffusion pipes of adjacent pretreatment chambers, and an air aeration flexible connecting pipe is connected between the air aeration pipes of adjacent pretreatment chambers.

[0044] Depending on the topography of the water area, multiple pretreatment modules can be arranged in the water. Adjacent pretreatment boxes are connected by a flexible frame, adjacent ultraviolet excitation devices are connected by a flexible cable, adjacent ozone aeration pipes are connected by a flexible ozone connection pipe, adjacent oxidant solution diffusion pipes are connected by a flexible oxidant solution connection pipe, and adjacent air aeration pipes are connected by a flexible air aeration connection pipe. Thus, multiple pretreatment modules can be arranged in the water area in the required shape to improve the uniformity of water treatment.

[0045] In a preferred embodiment of the present invention, the liquid inlet module includes a liquid inlet suction pump installed on the lower liquid inlet mixing chamber. The outlet of the liquid inlet suction pump is connected to a liquid inlet distribution pipe, which is disposed within the lower liquid inlet mixing chamber. The inlet of the liquid inlet suction pump is connected to a hollow universal joint, and a liquid inlet suction port is connected to the universal joint. The liquid inlet suction pump draws external water from the liquid inlet through the universal joint into the liquid inlet distribution pipe, and the liquid inlet distribution pipe sprays the water evenly into the lower liquid inlet mixing chamber.

[0046] In a preferred embodiment of the present invention, the mixing device includes a mixing head rotating device installed at the bottom of the pretreatment module. The output end of the mixing head rotating device is connected to a mixing head lifting device, and the output end of the mixing head lifting device is connected to a plurality of mixing head crushing blades. The mixing head rotating device can drive the plurality of mixing head crushing blades to rotate, thereby crushing the underlying soil of the water body. The mixing head lifting device can adjust the height of the plurality of mixing head crushing blades to crush the soil at different locations.

[0047] In a preferred embodiment of the present invention, the deep processing module includes a deep processing box, within which are respectively installed a water substrate preliminary treatment and separation device, a concentrated mud treatment device, and a water treatment device. A water substrate suction device is connected to the water substrate preliminary treatment and separation device, with its inlet extending to the bottom water layer. The concentrated mud treatment device and the water treatment device are respectively connected to the water substrate preliminary treatment and separation device via pipes. The water substrate suction device draws the bottom water layer into the water substrate preliminary treatment and separation device, which then performs rotational separation of the water. The clearer outer layer of water is sent to the water treatment device for processing, while the inner layer of concentrated mud is sent to the concentrated mud treatment device for processing.

[0048] In a preferred embodiment of the present invention, the preliminary treatment and separation device for water substrate includes a water substrate separation tank, a water substrate suction device connected to the top of the water substrate separation tank, a water substrate separation drive mechanism installed inside the water substrate separation tank, and a water substrate separation conical barrel connected to the output end of the water substrate separation drive mechanism. The water substrate separation conical barrel is disposed within the water substrate separation tank. A water treatment device is connected to the water substrate separation tank via a pipeline, and a concentrated sludge treatment device is rotatably connected to the water substrate separation conical barrel via a pipeline. The water substrate suction device pumps the bottom water into the water substrate separation tank, and the water substrate separation drive mechanism drives the water substrate separation conical barrel to rotate. The clearer water enters the water substrate separation liquid storage chamber between the water substrate separation conical barrel and the water substrate separation tank, and is then sent to the water treatment device for treatment. The concentrated sludge in the water substrate separation conical barrel is sent to the concentrated sludge treatment device for further treatment.

[0049] As a preferred embodiment of the present invention, the water treatment device includes a water treatment tank. The bottom of the water treatment tank is connected to a preliminary water treatment and separation device via a pipe. A magnetic flocculation catalytic particle dosing device is connected to the pipe between the water treatment tank and the preliminary water treatment and separation device. A heating device, a UV lamp device, and a reaction accelerator for suspending the magnetic flocculation catalytic particles are installed inside the water treatment tank. Several magnetic sedimentation plates are provided on the upper part of the water treatment tank. A tailwater outlet is provided on the top of the water treatment tank.

[0050] The heating device is spirally installed on the inner wall of the water treatment tank to heat the water. A UV lamp irradiates the water with UV light, selecting UVA, UVB, or UVC depending on the level of pollution. The reaction accelerator can be a high-frequency electromagnetic field generator or a microwave generator. The technical constraints of the high-frequency electromagnetic field generator comply with GB / T 26962-2011, "Technical Conditions for High-Frequency Electromagnetic Field Integrated Water Processor." The magnetic field direction changes at a specific frequency to ensure the magnetic reactive materials added to the water are fully suspended, improving the water treatment reaction efficiency. The magnetic flocculation catalytic particles added by the magnetic flocculation catalytic particle dosing device are FeS, magnetic fly ash, etc. One side of the sedimentation plate has a gap with the inner wall of the water treatment tank, and the gap sides of adjacent sedimentation plates are opposite. The surface of the sedimentation plate has magnetic force to adsorb magnetic flocculants in the subsequent effluent.

[0051] In a preferred embodiment of the present invention, the concentrated mud treatment device includes a concentrated mud treatment tank, which is connected to a preliminary water treatment and separation device via a pipeline. The concentrated mud treatment tank is equipped with a mud treatment heating pipe, a main stirring device, and several auxiliary stirring devices. A mud discharge device is connected to the top of the concentrated mud treatment tank. The main stirring device and several auxiliary stirring devices in the concentrated mud treatment tank thoroughly stir the concentrated mud, the mud treatment heating pipe heats the concentrated mud, and the treated mud is discharged in situ via the mud discharge device.

[0052] As a preferred embodiment of the present invention, a backflushing fluid storage device is also installed inside the deep treatment tank; the backflushing fluid storage device includes a pre-backflushing fluid storage chamber and a post-backflushing fluid storage chamber, a filter screen is provided between the pre-backflushing fluid storage chamber and the post-backflushing fluid storage chamber, an oxidant dosing device is installed in the post-backflushing fluid storage chamber, and the post-backflushing fluid storage chamber is connected to the lower part of the concentrated mud treatment device through a pipeline.

[0053] The treated water is sent to the pre-backflushing fluid storage tank. After being filtered through a filter screen, the water overflows into the post-backflushing fluid storage tank, from which it is then sent to the concentrated mud treatment unit. During the concentrated mud treatment process, water is sent to the concentrated mud treatment tank to dilute the mud, ensuring it is thoroughly agitated before being discharged. During backflushing of the concentrated mud treatment tank, a larger flow rate of water is sent to ensure thorough flushing.

[0054] The beneficial effects of this invention are as follows:

[0055] 1. The pretreatment module of this invention can treat water containing low concentrations of aquatic substrate matrix through ozone aeration, air aeration, oxidation, and photocatalytic reaction, and the treated water is discharged in situ. The stirring device can break up the underlying substrate soil of the water body, and the deep treatment module separates the water containing high concentrations of aquatic substrate matrix after the breakup. The separated concentrated mud and water are then separately remediated and discharged in situ. This invention provides a comprehensive treatment plan for complex pollution situations, combining multiple remediation technologies and measures to ensure comprehensive and effective pollution control.

[0056] 2. This invention develops a low-cost, high-efficiency combination of remediation technologies. It combines physical, chemical, and biological remediation methods, leveraging their respective advantages to reduce overall costs. This invention also develops environmentally friendly chemical reagents to reduce secondary pollution and byproducts. Furthermore, this invention addresses the solid-liquid-gas mixture generated during water body substrate remediation by introducing advanced oxidation technology to enhance overall removal efficiency. Finally, this invention incorporates automated control technology to precisely regulate various parameters throughout the remediation process. Attached Figure Description

[0057] Figure 1 This is a schematic diagram of the structure of the present invention;

[0058] Figure 2 This is a schematic diagram of the stirring device;

[0059] Figure 3 This is a schematic diagram of the preprocessing module;

[0060] Figure 4 This is a partial structural diagram of the pre-processing module when the sealing plate is removed;

[0061] Figure 5 This is a partial structural diagram of the preprocessing module;

[0062] Figure 6 This is a schematic diagram of the flexible frame structure;

[0063] Figure 7 This is a schematic diagram of the deep processing module;

[0064] Figure 8 This is a structural diagram of the depth processing module when the depth processing housing is opened;

[0065] Figure 9 This is a cross-sectional view of the depth processing module;

[0066] Figure 10 This is a cross-sectional structural diagram of a water treatment device;

[0067] Figure 11 This is a cross-sectional view of the preliminary treatment and separation device for water body substrate;

[0068] Figure 12 This is a cross-sectional view of the concentrated mud treatment unit;

[0069] Figure 13 This is a schematic diagram of the backflush fluid storage device;

[0070] Figure 14 This is a cross-sectional view of the backflush fluid storage device.

[0071] In the diagram: 1-Pretreatment module; 2-Stirring device; 3-Deep treatment module; 4-Walking device; 11-Pretreatment box; 12-Flexible frame; 21-Stirring head rotation device; 22-Stirring head lifting device; 23-Stirring head crushing blade; 31-Deep treatment box; 32-Preliminary treatment and separation device for water substrate; 33-Concentrated mud treatment device; 34-Water treatment device; 35-Water substrate suction device; 36-Backwash fluid storage device; 111-Liquid inlet module; 112-Ozone aeration pipe; 11 3-Oxidant solution diffuser; 114-Air aeration pipe; 115-Water distribution structure; 116-Ultraviolet excitation device; 117-Sealing plate; 118-Water quality detection sensor; 119-Structural suspension module; 121-Flexible cable; 122-Ozone flexible connection pipe; 123-Oxidant solution flexible connection pipe; 124-Air aeration flexible connection pipe; 125-Connecting sealing plate; 321-Water substrate separation tank; 322-Water substrate separation drive mechanism; 323-Water substrate separation conical barrel; 3 24-Mulch pump; 325-Separator impeller; 331-Concentrated sludge treatment tank; 332-Mulch treatment heating pipe; 333-Main agitator; 334-Secondary agitator; 335-Mulch discharge device; 336-Waste gas collection device; 337-Gas transmission pipe; 341-Water treatment tank; 342-Magnetic flocculation catalytic particle dosing device; 343-Heating device; 344-UV lamp device; 345-Reaction accelerator; 346-Sedimentation plate; 347-Tailwater outlet; 348-UV lamp Light support; 349-Return pipe; 351-Water base suction pipe; 352-Water base suction pump; 361-Backflush fluid pre-storage chamber; 362-Backflush fluid post-storage chamber; 363-Filter screen; 364-Oxidant dosing device; 365-Backflush fluid inlet pipe; 366-Backflush fluid inlet pump; 1111-Inlet suction pump; 1112-Inlet distribution pipe; 1113-Universal head; 1114-Inlet suction port; 1191-Universal steering mechanism; 1192-Suspension power unit; 1193-Propulsion device. Detailed Implementation

[0072] 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.

[0073] 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.

[0074] like Figures 1-13 As shown, the in-situ remediation device for water body base soil in this embodiment includes a pretreatment module 1 for treating the upper water body, and a plurality of mixing devices 2 for breaking the bottom soil of the water body base are installed at the bottom of the pretreatment module 1; a deep treatment module 3 for treating the water body after the soil is broken by the mixing devices 2 is connected to the pretreatment module 1.

[0075] The pretreatment module 1 of this invention can treat water containing low-concentration water-based substrate through ozone aeration, air aeration, oxidation, and photocatalytic reactions, and the treated water is discharged in situ. The stirring device 2 can break up the underlying substrate soil of the water body, and the deep treatment module 3 separates the water containing high-concentration water-based substrate produced after the breakup. The separated concentrated mud and water are then separately treated for remediation, and discharged in situ after treatment. This invention addresses complex pollution situations by developing a comprehensive treatment plan that combines multiple remediation technologies and measures to ensure comprehensive and effective pollution control.

[0076] This invention develops a low-cost, high-efficiency combination of remediation technologies. It combines physical, chemical, and biological remediation methods, leveraging their respective advantages to reduce overall costs. This invention also develops environmentally friendly chemical reagents to reduce secondary pollution and byproducts. Furthermore, this invention addresses the solid-liquid-gas mixture generated during water body substrate remediation by introducing advanced oxidation technology to enhance overall removal efficiency. Finally, this invention incorporates automated control technology to precisely regulate various parameters throughout the remediation process.

[0077] Specifically, the pretreatment module 1 includes a pretreatment box 11, which contains a lower inlet mixing chamber and an upper ultraviolet reaction chamber. An inlet module 111 is installed on the lower inlet mixing chamber, and an ozone aeration pipe 112, an oxidant solution diffusion pipe 113, and an air aeration pipe 114 are installed inside the lower inlet mixing chamber. A water distribution structure 115 is installed between the lower inlet mixing chamber and the upper ultraviolet reaction chamber to transport water from the lower inlet mixing chamber to the upper ultraviolet reaction chamber. An ultraviolet excitation device 116 is installed in the upper ultraviolet reaction chamber, and a pretreatment outlet is provided on the upper ultraviolet reaction chamber.

[0078] After the inlet module 111 pumps external water into the lower inlet mixing chamber, the ozone aeration pipe 112 aerates the water with ozone, the oxidant solution diffusion pipe 113 diffuses the oxidant to oxidize pollutants in the water, and the air aeration pipe 114 aerates the water with air. The treated water is then pumped to the upper ultraviolet reaction chamber by the water distribution structure 115, where the ultraviolet excitation device 116 irradiates the water with ultraviolet light for further treatment. The treated water is then discharged in situ.

[0079] It should be noted that a sealing plate 117 is also provided at the end of the pretreatment tank 11, which can be removed to inspect the pretreatment module 1. A water quality sensor 118 is also installed on the pretreatment tank 11, used to detect ammonia nitrogen, conductivity, total phosphorus, pH, DO, temperature, etc. Aeration holes are evenly distributed on the surface of the ozone aeration pipe 112 and the air aeration pipe 114. The oxidant solution diffuser pipe 113 is made of oxidation-resistant material, with a dedicated diffuser head on its surface. The oxidant can be hydrogen peroxide, persulfate, peracetic acid, periodate, etc., and the concentration is determined according to the COD concentration of the water body at the site. The ultraviolet excitation device 116 is an ultraviolet lamp or an LED ultraviolet device. The ozone aeration pipe 112, oxidant solution diffuser pipe 113, air aeration pipe 114, and ultraviolet excitation device 116 are all installed inside the pretreatment tank 11 via a support frame.

[0080] To facilitate movement in water, a walking device 4 is also installed at the bottom of the pretreatment module 1. The walking device 4 is a tracked mechanism.

[0081] Furthermore, the number of pretreatment chambers 11 is at least two, with a flexible frame 12 connecting adjacent pretreatment chambers 11, a flexible cable 121 connecting the ultraviolet excitation devices 116 of adjacent pretreatment chambers 11, an ozone flexible connecting pipe 122 connecting the ozone aeration pipes 112 of adjacent pretreatment chambers 11, an oxidant solution flexible connecting pipe 123 connecting the oxidant solution diffusion pipes 113 of adjacent pretreatment chambers 11, and an air aeration flexible connecting pipe 124 connecting the air aeration pipes 114 of adjacent pretreatment chambers 11.

[0082] It should be noted that: the end of the flexible frame 12 is connected to a connecting sealing plate 125, the connecting sealing plate 125 is provided with a water outlet hole, and the flexible frame 12 is also provided with several pipe connection ports and power connection ports. The ozone flexible connection pipe 122, the oxidant solution flexible connection pipe 123 and the air aeration flexible connection pipe 124 pass through the corresponding pipe connection ports respectively, and the flexible cable 121 passes through the power connection port.

[0083] Depending on the topography of the water area, multiple pretreatment modules 1 can be arranged in the water area. Adjacent pretreatment boxes 11 are connected by a flexible frame 12, adjacent ultraviolet excitation devices 116 are connected by a flexible cable 121, adjacent ozone aeration pipes 112 are connected by an ozone flexible connecting pipe 122, adjacent oxidant solution diffusion pipes 113 are connected by an oxidant solution flexible connecting pipe 123, and adjacent air aeration pipes 114 are connected by an air aeration flexible connecting pipe 124. Thus, multiple pretreatment modules 1 can be arranged in the water area according to the required shape to improve the uniformity of water treatment.

[0084] The liquid inlet module 111 includes a liquid inlet suction pump 1111 installed on the lower liquid inlet mixing chamber. The outlet of the liquid inlet suction pump 1111 is connected to a liquid inlet distribution pipe 1112, which is located within the lower liquid inlet mixing chamber. The inlet of the liquid inlet suction pump 1111 is connected to a hollow universal joint 1113, and a liquid inlet suction port 1114 is connected to the universal joint 1113. The liquid inlet suction pump 1111 draws external water from the liquid inlet suction port 1114 through the universal joint 1113 into the liquid inlet distribution pipe 1112. The liquid inlet distribution pipe 1112 then evenly sprays the water into the lower liquid inlet mixing chamber.

[0085] The mixing device 2 includes a mixing head rotating device 21 installed at the bottom of the pretreatment module 1. The output end of the mixing head rotating device is connected to a mixing head lifting device 22, and the output end of the mixing head lifting device 22 is connected to several mixing head crushing blades 23. The mixing head rotating device 21 can drive the several mixing head crushing blades 23 to rotate, thereby crushing the underlying soil of the water body. The mixing head lifting device 22 can adjust the height of the several mixing head crushing blades 23 to crush the soil at different locations.

[0086] Specifically, the deep processing module 3 includes a deep processing box 31, within which are installed a water substrate preliminary treatment and separation device 32, a concentrated mud treatment device 33, and a water treatment device 34. A water substrate suction device 35 is connected to the water substrate preliminary treatment and separation device 32, with its inlet extending into the bottom water layer. The concentrated mud treatment device 33 and the water treatment device 34 are connected to the water substrate preliminary treatment and separation device 32 via pipes. The water substrate suction device 35 draws the bottom water into the water substrate preliminary treatment and separation device 32, which then performs rotational separation. The clearer outer layer of water is sent to the water treatment device 34 for treatment, while the inner layer of concentrated mud is sent to the concentrated mud treatment device 33 for treatment.

[0087] The water substrate preliminary treatment and separation device 32 includes a water substrate separation tank 321, a water substrate suction device 35 connected to the top of the water substrate separation tank 321, a water substrate separation drive mechanism 322 installed inside the water substrate separation tank 321, and a water substrate separation conical barrel 323 connected to the output end of the water substrate separation drive mechanism 322. The water substrate separation conical barrel 323 is located in the water substrate separation tank 321. A water treatment device 34 is connected to the water substrate separation tank 321 via a pipe, and a concentrated mud treatment device 33 is rotatably connected to the water substrate separation conical barrel 323 via a pipe. A mud pump 324 is installed on the pipe between the water substrate separation tank 321 and the concentrated mud treatment device 33. The water substrate suction device 35 pumps the bottom water into the water substrate separation tank 321, and the water substrate separation drive mechanism 322 drives the water substrate separation conical barrel 323 to rotate. The clearer water enters the water base separation liquid storage chamber between the water base separation conical tank 323 and the water base separation tank 321, and is then sent to the water treatment device 34 for processing. The concentrated sludge in the water base separation conical tank 323 is sent to the concentrated sludge treatment device 33 for processing.

[0088] The water-based substrate separation conical barrel 323 is equipped with a separation wheel 325, and a heating device 343 is installed on the separation wheel 325. The bottom conical structure of the water-based substrate separation conical barrel 323 adopts a dense mesh structure to facilitate the separation of water from the water-based substrate.

[0089] The water substrate separation drive mechanism 322 includes a water substrate separation drive motor mounted on the water substrate separation tank 321. A drive gear is connected to the output end of the water substrate separation drive motor, and a driven gear is connected to the water substrate separation conical barrel 323. The drive gear meshes with the driven gear. The water substrate separation drive mechanism 322 drives the water substrate separation conical barrel 323 to rotate. The rotation direction is set to clockwise or counterclockwise according to the arrangement of the separation wheel plates 325, and the rotation speed is determined according to the hydraulic residence time required by the subsequent water treatment device 34.

[0090] The water treatment device 34 includes a water treatment tank 341. The bottom of the water treatment tank 341 is connected to a water substrate preliminary treatment and separation device 32 via a pipe. A magnetic flocculation catalytic particle dosing device 342 is connected to the pipe between the water treatment tank 341 and the water substrate preliminary treatment and separation device 32. A heating device 343, a UV lamp device 344, and a reaction accelerator 345 for suspending the magnetic flocculation catalytic particles are installed inside the water treatment tank 341. Several magnetic sedimentation plates 346 are provided on the upper part of the water treatment tank 341. A tailwater outlet 347 is provided on the top of the water treatment tank 341.

[0091] It should be noted that the heating device 343 is spirally arranged on the inner wall of the water treatment tank 341 to heat the water. A UV lamp support 348 is installed inside the water treatment tank 341, and the UV lamp device 344 is mounted on the UV lamp support 348. The reaction heater has a ring-shaped structure, connected to the outer ring between the UV lamps, and is located inside the heating device 343. The UV lamp device 344 irradiates the water with UV light, selecting UVA, UVB, UVC, etc., depending on the degree of pollution in the separated water. The reaction accelerator 345 can be a high-frequency electromagnetic field generator or a microwave generator. The relevant technical constraints of the high-frequency electromagnetic field generator comply with the "Technical Conditions for High-Frequency Electromagnetic Field Integrated Water Processor" GB / T 26962-2011. Simultaneously, the magnetic field direction changes according to a certain frequency to ensure that the added magnetic reactive materials in the water are fully suspended, improving the water treatment reaction efficiency. The magnetic flocculation catalytic particles added by the magnetic flocculation catalytic particle dosing device 342 are FeS, magnetic fly ash, etc. One side of the sedimentation plate 346 has a gap with the inner wall of the water treatment tank 341, and the gap sides of adjacent sedimentation plates 346 are opposite. The surface of the sedimentation plate 346 has magnetic force to adsorb magnetic flocculent particles in the subsequent effluent.

[0092] A return pipe 349 connects the pipeline between the water base separation tank 321 and the water treatment tank 341 to the upper part of the water treatment tank 341. The return ratio is adjusted appropriately according to the treatment effect: 20%–200%.

[0093] The concentrated mud treatment device 33 includes a concentrated mud treatment tank 331, which is connected to a preliminary water treatment and separation device 32 via a pipeline. The concentrated mud treatment tank 331 is equipped with a mud treatment heating pipe 332, a main stirring device 333, and several auxiliary stirring devices 334. A mud discharge device 335 is connected to the top of the concentrated mud treatment tank 331. The main stirring device 333 and the several auxiliary stirring devices 334 in the concentrated mud treatment tank 331 thoroughly stir the concentrated mud, the mud treatment heating pipe 332 heats the concentrated mud, and the treated mud is discharged in situ via the mud discharge device 335.

[0094] The top of the concentrated sludge treatment tank 331 is a waste gas collection device 336, which is connected to a gas transmission pipe 337. The other end of the gas transmission pipe 337 is connected to the pipeline between the water base separation tank 321 and the water treatment tank 341, thereby sending the gas generated in the concentrated sludge treatment tank 331 into the water treatment tank 341 for treatment. Furthermore, the gas transmission pipe 337 can extend to the lower part of the waste gas collection device 336 to pump away the upper layer of liquid in the concentrated sludge treatment tank 331.

[0095] The water base suction device 35 includes a water base suction pipe 351, one end of which extends into the bottom water, and the other end of which is connected to a water base suction pump 352. The other end of the water base suction pump 352 is connected to a water base preliminary treatment and separation device 32.

[0096] To ensure the mud discharge device 335 remains above the water surface for smooth mud discharge, it needs to be suspended. This invention includes several structural suspension modules 119 connected to the side wall of the pretreatment tank 11. Each structural suspension module 119 includes a two-degree-of-freedom omnidirectional steering mechanism 1191 connected to the side wall of the pretreatment tank 11. The output end of the omnidirectional steering mechanism 1191 is connected to a suspension power device 1192, and the output end of the suspension power device 1192 is connected to a propulsion device 1193.

[0097] The water base suction pipe 351 is a telescopic pipe. After the device is suspended, the water base suction pipe 351 extends so that its inlet extends to the bottom water.

[0098] Furthermore, a backflushing fluid storage device 36 is also installed inside the deep processing tank 31; the backflushing fluid storage device 36 includes a pre-backflushing fluid storage chamber 361 and a post-backflushing fluid storage chamber 362, a filter screen 363 is provided between the pre-backflushing fluid storage chamber 361 and the post-backflushing fluid storage chamber 362, an oxidant dosing device 364 is installed inside the post-backflushing fluid storage chamber 362, and the post-backflushing fluid storage chamber 362 is connected to the lower part of the concentrated mud treatment device 33 through a pipe.

[0099] It should be noted that the pipe between the backflushing fluid storage tank 362 and the concentrated mud treatment tank 331 has a flap valve connected to one end of its extension into the concentrated mud treatment tank 331. The upper side of the flap valve is hinged to the pipe, and a pressure pump is installed on the pipe. When the pressure pump is turned on, water in the backflushing fluid storage tank 362 is pumped into the concentrated mud treatment tank 331, and the flap valve is pushed open by the pressurized water. When the pressure pump is turned off, the flap valve closes under the pressure of the mud in the concentrated mud treatment tank 331 and the flap valve's own weight, preventing mud from clogging the pipe.

[0100] The treated water is sent to the pre-backflushing fluid storage tank. After being filtered by filter screen 363, the water overflows into the post-backflushing fluid storage tank 362. The water in the post-backflushing fluid storage tank 362 is then sent to the concentrated mud treatment device 33. During the treatment of the concentrated mud, water is sent to the concentrated mud treatment tank 331 to dilute the mud, ensuring that the mud is fully agitated and discharged. When backflushing the concentrated mud treatment tank 331, a larger flow rate of water is sent to the concentrated mud treatment tank 331 to ensure that the concentrated mud treatment tank 331 is thoroughly flushed.

[0101] It should be noted that the oxidant added by the oxidant dosing device 364 is mixed with the solution in the backflushing liquid storage tank 362, and then pumped into the lower part of the concentrated mud treatment device 33 for mud treatment. Commonly used oxidants can be hydrogen peroxide, persulfate, peracetic acid, periodate, etc.

[0102] A backflushing fluid inlet pipe 365 connects the lower part of the backflushing fluid pre-storage chamber 361 to the upper ultraviolet reaction chamber, and a backflushing fluid inlet pump 366 is installed on the backflushing fluid inlet pipe 365. The tailwater outlet 347 on the water treatment tank 341 is also connected to the backflushing fluid pre-storage chamber 361. The water in the backflushing fluid pre-storage chamber 361 can come from the water in the upper ultraviolet reaction chamber or from the water treatment tank 341.

[0103] 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 device for in-situ remediation of soil at the base of a water body, characterized in that: It includes a pretreatment module (1) for treating the upper water body, and a number of mixing devices (2) for breaking the bottom soil of the water body are installed at the bottom of the pretreatment module (1); it also includes a deep treatment module (3) for treating the water body after the soil is broken by the mixing device (2). The pretreatment module (1) includes a pretreatment box (11), which is provided with a lower liquid inlet mixing chamber and an upper ultraviolet reaction chamber. A liquid inlet module (111) is installed on the lower liquid inlet mixing chamber, and an ozone aeration pipe (112), an oxidant solution diffusion pipe (113), and an air aeration pipe (114) are installed inside the lower liquid inlet mixing chamber. A water distribution structure (115) for transporting water from the lower liquid inlet mixing chamber to the upper ultraviolet reaction chamber is installed between the lower liquid inlet mixing chamber and the upper ultraviolet reaction chamber. An ultraviolet excitation device (116) is installed in the upper ultraviolet reaction chamber, and a pretreatment outlet is provided on the upper ultraviolet reaction chamber. The number of pretreatment chambers (11) is at least two. A flexible frame (12) is connected between adjacent pretreatment chambers (11). A flexible cable (121) is connected between the ultraviolet excitation devices (116) of adjacent pretreatment chambers (11). An ozone flexible connecting pipe (122) is connected between the ozone aeration pipes (112) of adjacent pretreatment chambers (11). An oxidant solution flexible connecting pipe (123) is connected between the oxidant solution diffusion pipes (113) of adjacent pretreatment chambers (11). An air aeration flexible connecting pipe (124) is connected between the air aeration pipes (114) of adjacent pretreatment chambers (11). The deep processing module (3) includes a deep processing box (31), in which a water body substrate preliminary treatment separation device (32), a concentrated mud treatment device (33) and a water body treatment device (34) are respectively installed. A water body substrate suction device (35) is connected to the water body substrate preliminary treatment separation device (32). The inlet of the water body substrate suction device (35) extends to the bottom water body. The concentrated mud treatment device (33) and the water body treatment device (34) are respectively connected to the water body substrate preliminary treatment separation device (32) through pipes. The water substrate preliminary treatment and separation device (32) includes a water substrate separation tank (321), a water substrate suction device (35) connected to the top of the water substrate separation tank (321), a water substrate separation drive mechanism (322) installed inside the water substrate separation tank (321), a water substrate separation conical barrel (323) connected to the output end of the water substrate separation drive mechanism (322), the water substrate separation conical barrel (323) set in the water substrate separation tank (321), a water treatment device (34) connected to the water substrate separation tank (321) through a pipe, and a concentrated mud treatment device (33) rotatably connected to the water substrate separation conical barrel (323) through a pipe.

2. The in-situ remediation device for water body foundation soil according to claim 1, characterized in that: The liquid inlet module (111) includes a liquid inlet suction pump (1111) installed on the lower liquid inlet mixing chamber. The outlet of the liquid inlet suction pump (1111) is connected to a liquid inlet distribution pipe (1112). The liquid inlet distribution pipe (1112) is located in the lower liquid inlet mixing chamber. The inlet of the liquid inlet suction pump (1111) is connected to a hollow universal joint (1113). The universal joint (1113) is connected to a liquid inlet suction port (1114).

3. The in-situ remediation device for water body substrate soil according to claim 1, characterized in that: The stirring device (2) includes a stirring head rotating device (21) installed at the bottom of the pretreatment module (1), the output end of the stirring head rotating device is connected to a stirring head lifting device (22), and the output end of the stirring head lifting device (22) is connected to a number of stirring head crushing blades (23).

4. The in-situ remediation device for water body substrate soil according to claim 1, characterized in that: The water treatment device (34) includes a water treatment tank (341). The bottom of the water treatment tank (341) is connected to the water substrate preliminary treatment and separation device (32) through a pipe. A magnetic flocculation catalytic particle dosing device (342) is connected to the pipe between the water treatment tank (341) and the water substrate preliminary treatment and separation device (32). A heating device (343), a UV lamp device (344), and a reaction accelerator (345) for suspending the magnetic flocculation catalytic particles are installed inside the water treatment tank (341). Several magnetic sedimentation plates (346) are provided on the upper part of the water treatment tank (341). A tailwater outlet (347) is provided on the top of the water treatment tank (341).

5. The in-situ remediation device for water body foundation soil according to claim 1, characterized in that: The concentrated mud treatment device (33) includes a concentrated mud treatment tank (331), which is connected to a water body substrate preliminary treatment and separation device (32) via a pipeline. The concentrated mud treatment tank (331) is equipped with a mud treatment heating pipe (332), a main stirring device (333) and several auxiliary stirring devices (334). The top of the concentrated mud treatment tank (331) is connected to a mud discharge device (335).

6. The in-situ remediation device for water body foundation soil according to claim 5, characterized in that: The deep processing tank (31) is also equipped with a backflushing fluid storage device (36); the backflushing fluid storage device (36) includes a backflushing fluid pre-storage chamber (361) and a backflushing fluid post-storage chamber (362), a filter screen (363) is provided between the backflushing fluid pre-storage chamber (361) and the backflushing fluid post-storage chamber (362), an oxidant dosing device (364) is installed in the backflushing fluid post-storage chamber (362), and the backflushing fluid post-storage chamber (362) is connected to the lower part of the concentrated mud treatment device (33) through a pipe.

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