A water body substrate soil in-situ remediation device pretreatment module

Abstract

The present application belongs to the technical field of water body base soil pollution remediation, and particularly relates to a water body base soil in-situ remediation device pretreatment module. The technical scheme is as follows: a water body base soil in-situ remediation device pretreatment module, comprising a pretreatment box body, a lower layer liquid inlet mixing chamber and an upper layer ultraviolet reaction chamber are arranged in the pretreatment box body; a liquid inlet module is installed on the lower layer liquid inlet mixing chamber, an ozone aeration pipe, an oxidant solution diffusion pipe and an air aeration pipe are installed in the lower layer liquid inlet mixing chamber; a water distribution structure for conveying water in the lower layer liquid inlet mixing chamber to the upper layer ultraviolet reaction chamber is installed between the lower layer liquid inlet mixing chamber and the upper layer ultraviolet reaction chamber, an ultraviolet excitation device is installed in the upper layer ultraviolet reaction chamber, and a pretreatment water outlet hole is arranged on the upper layer ultraviolet reaction chamber. The present application provides a water body base soil in-situ remediation device pretreatment module.

Description

Technical Field

[0001] This invention belongs to the field of water body substrate soil pollution remediation technology, and specifically relates to a pretreatment module for an in-situ remediation device for water body substrate soil. Background Technology

[0002] Aquatic substrate soil refers to the soil deposited at the bottom of a water body. It is affected by both water and land, making it heavily polluted. Aquatic substrate soil pollution mainly includes heavy metal pollution, organic pollutant pollution, and acid pollution. Common types of aquatic substrate soil pollution include: 1) Heavy metal pollution: Heavy metals are the primary type of aquatic substrate soil pollution. Heavy metals mainly originate from human activities, such as industrial wastewater discharge, the use of pesticides and fertilizers, and mining. Heavy metal pollution can severely damage aquatic ecosystems and enter the human body through the food chain, harming human health. 2) Organic pollutant pollution: Organic pollutants include petroleum hydrocarbons, pesticides, fertilizers, and organic industrial waste. Organic pollutants can disrupt the ecological balance of aquatic bodies and harm human health.

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

[0004] Currently, common methods for remediating soil pollution at the base of water bodies include:

[0005] 1) Physical restoration techniques:

[0006] Dredging: Using mechanical equipment to excavate and treat or dispose of contaminated bottom sediment. Suitable for severely polluted areas, but costly and prone to causing secondary pollution.

[0007] Covering: Covering the contaminated sediment with a layer of clean soil, sand, or other material to isolate the contaminants. Suitable for areas with low or stable levels of contamination.

[0008] Solidification / stabilization: By adding a solidifying agent, pollutants are fixed within soil particles, reducing their migration and release. Suitable for soils contaminated with heavy metals.

[0009] 2) Chemical remediation technology:

[0010] Chemical oxidation-reduction: This involves converting toxic pollutants into non-toxic or less toxic substances by adding oxidizing or reducing agents. For example, oxidizing agents such as hydrogen peroxide and ozone are used to treat organic pollutants.

[0011] Chemical precipitation: This involves adding chemical reagents to convert dissolved pollutants into insoluble precipitates, thereby reducing their bioavailability. For example, adding lime or phosphates can cause heavy metals to form insoluble compounds.

[0012] Adsorption: This method uses adsorption materials such as activated carbon and zeolite to remove pollutants from water. It is suitable for various organic pollutants and some heavy metals.

[0013] 3) Bioremediation technology:

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

[0015] Phytoremediation: This method utilizes aquatic plants to absorb and accumulate pollutants. It is suitable for lightly polluted water bodies. By planting plants such as water hyacinth and reeds, some heavy metals and organic pollutants can be removed.

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

[0017] However, using the above-mentioned remediation technologies alone usually requires a large investment of manpower, materials, and machinery, and is prone to generating highly toxic waste, causing secondary pollution.

[0018] In recent years, integrated remediation technologies have 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 aquatic ecosystems. For example, through integrated measures such as dredging, covering, and phytoremediation, pollutants are removed while the ecological environment is improved.

[0020] 2) In-situ remediation: Without excavating the bottom sediment, remediation materials (such as activated carbon, microbial agents, etc.) are added and mixed using equipment to degrade or fix pollutants in situ.

[0021] Although current methods for treating water-based soil have achieved some success in pollution control, they still face problems such as high cost, secondary pollution, low efficiency, and difficulty in monitoring.

[0022] In summary, current conventional methods for treating soil at the base of water bodies have the following problems:

[0023] 1) High cost:

[0024] Dredging: Mechanical dredging and disposal of contaminated sediment are very costly, especially for large 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 effect 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 a pretreatment module for an in-situ remediation device for soil on water body substrates.

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

[0038] A pretreatment module for an in-situ remediation device for water-based soil includes a pretreatment chamber containing a lower inlet mixing chamber and an upper ultraviolet reaction chamber. An inlet module is installed in the lower inlet mixing chamber, which also houses 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 two chambers. An ultraviolet excitation device is installed in the upper ultraviolet reaction chamber, which also has a pretreatment outlet.

[0039] 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.

[0040] This invention enables the treatment of water bodies containing low concentrations of substrate matrix through ozone aeration, air aeration, oxidation, and photocatalytic reactions, with the treated water being discharged in situ. This invention addresses complex pollution situations by developing comprehensive treatment solutions that combine multiple remediation technologies and measures to ensure thorough and effective pollution control.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] As a preferred embodiment of the present invention, the end of the flexible frame is connected to a connecting sealing plate, the connecting sealing plate is provided with a connecting water outlet hole, and the flexible frame is also provided with a number of pipe connection ports and power connection ports. The ozone flexible connection pipe, the oxidant solution flexible connection pipe and the air aeration flexible connection pipe pass through the corresponding pipe connection ports, and the flexible cable passes through the power connection port.

[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] As a preferred embodiment of the present invention, a water quality detection sensor is also installed on the pretreatment tank. The water quality detection sensor is used to detect ammonia nitrogen, conductivity, total phosphorus, pH, DO, temperature, etc.

[0047] In a preferred embodiment of the present invention, a plurality of structural suspension modules are connected to the side wall of the pretreatment tank. The structural suspension modules can lift the pretreatment modules to a certain height for treating water at a specific location.

[0048] As a preferred embodiment of the present invention, the structural suspension module includes a universal steering mechanism with two degrees of freedom connected to the side wall of the pretreatment box, the output end of the universal steering mechanism is connected to a suspension power device, and the output end of the suspension power device is connected to a propulsion device.

[0049] In a preferred embodiment of the present invention, the water distribution structure includes a water distribution pipe connected to a partition between the lower inlet mixing chamber and the upper ultraviolet reaction chamber, and a water distribution pump is installed on the water distribution pipe. The water distribution pump can pump the lower inlet mixing chamber into the upper ultraviolet reaction chamber.

[0050] As a preferred embodiment of the present invention, a plurality of lower support frames are fixed in the lower liquid inlet mixing chamber, and the ozone aeration pipe, the oxidant solution diffusion pipe, and the air aeration pipe are installed in the lower liquid inlet mixing chamber through the lower support frames.

[0051] As a preferred embodiment of the present invention, a plurality of upper support frames are fixed in the upper ultraviolet reaction chamber, and the ultraviolet excitation device is installed in the upper ultraviolet reaction chamber through the upper support frames.

[0052] The beneficial effects of this invention are as follows:

[0053] 1. This invention can treat water containing low concentrations of substrate matrix using ozone aeration, air aeration, oxidation, and photocatalytic reactions, with the treated water discharged in situ. This invention addresses complex pollution situations by developing comprehensive treatment plans that combine multiple remediation technologies and measures to ensure thorough and effective pollution control.

[0054] 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 develops environmentally friendly chemical reagents to reduce secondary pollution and byproducts. This invention targets the solid-liquid-gas mixture generated during water body substrate improvement, enhancing comprehensive removal efficiency through the introduction of advanced oxidation technology. This invention incorporates automated control technology to precisely regulate various parameters during the remediation process. Attached Figure Description

[0055] Figure 1 This is a schematic diagram of the structure of the present invention;

[0056] Figure 2 This is a partial structural diagram of the invention when the sealing plate is removed;

[0057] Figure 3 This is a partial structural diagram of the present invention;

[0058] Figure 4 This is a schematic diagram of the flexible frame structure.

[0059] In the diagram: 1-Pretreatment chamber; 2-Flexible frame; 11-Liquid inlet module; 12-Ozone aeration pipe; 13-Oxidant solution diffusion pipe; 14-Air aeration pipe; 15-Water distribution structure; 16-Ultraviolet excitation device; 17-Sealing plate; 18-Water quality detection sensor; 19-Structural suspension module; 21-Flexible cable; 22-Ozone flexible connection pipe; 23-Oxidant solution flexible connection pipe; 24-Air aeration flexible connection pipe; 25-Connecting sealing plate; 111-Liquid inlet suction pump; 112-Liquid inlet distribution pipe; 113-Universal head; 114-Liquid inlet suction port; 191-Universal steering mechanism; 192-Suspension power unit; 193-Propulsion device. Detailed Implementation

[0060] 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.

[0061] 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.

[0062] like Figures 1-4 As shown, the pretreatment module of the in-situ remediation device for water-based soil in this embodiment includes a pretreatment box 1, which contains a lower inlet mixing chamber and an upper ultraviolet reaction chamber. An inlet module 11 is installed on the lower inlet mixing chamber, which also contains an ozone aeration pipe 12, an oxidant solution diffusion pipe 13, and an air aeration pipe 14. A water distribution structure 15 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 16 is installed in the upper ultraviolet reaction chamber, and a pretreatment outlet is provided on the upper ultraviolet reaction chamber.

[0063] After the inlet module 11 pumps external water into the lower inlet mixing chamber, the ozone aeration pipe 12 aerates the water with ozone, the oxidant solution diffusion pipe 13 diffuses the oxidant to oxidize pollutants in the water, and the air aeration pipe 14 aerates the water with air. The treated water is then pumped to the upper ultraviolet reaction chamber by the water distribution structure 15, where the ultraviolet excitation device 16 irradiates the water with ultraviolet light for further treatment. The treated water is then discharged in situ.

[0064] This invention enables the treatment of water bodies containing low concentrations of substrate matrix through ozone aeration, air aeration, oxidation, and photocatalytic reactions, with the treated water being discharged in situ. This invention addresses complex pollution situations by developing comprehensive treatment solutions that combine multiple remediation technologies and measures to ensure thorough and effective pollution control.

[0065] 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.

[0066] It should be noted that a sealing plate 17 is also provided at the end of the pretreatment tank 1. The pretreatment module can be inspected by removing the sealing plate 17. Aeration holes are evenly distributed on the surfaces of the ozone aeration pipe 12 and the air aeration pipe 14. The oxidant solution diffuser pipe 13 is made of oxidation-resistant material and has 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 16 is an ultraviolet lamp or an LED ultraviolet device.

[0067] Furthermore, the number of pretreatment chambers 1 is at least two, with a flexible frame 2 connecting adjacent pretreatment chambers 1, a flexible cable 21 connecting the ultraviolet excitation devices 16 of adjacent pretreatment chambers 1, an ozone flexible connecting pipe 22 connecting the ozone aeration pipes 12 of adjacent pretreatment chambers 1, an oxidant solution flexible connecting pipe 23 connecting the oxidant solution diffusion pipes 13 of adjacent pretreatment chambers 1, and an air aeration flexible connecting pipe 24 connecting the air aeration pipes 14 of adjacent pretreatment chambers 1.

[0068] It should be noted that: the end of the flexible frame 2 is connected to a connecting sealing plate 25, the connecting sealing plate 25 is provided with a water outlet hole, and the flexible frame 2 is also provided with several pipe connection ports and power connection ports. The ozone flexible connection pipe 22, the oxidant solution flexible connection pipe 23 and the air aeration flexible connection pipe 24 pass through the corresponding pipe connection ports respectively, and the flexible cable 21 passes through the power connection port.

[0069] Depending on the topography of the water area, multiple pretreatment modules can be arranged in the water. Adjacent pretreatment boxes 1 are connected by a flexible frame 2, adjacent ultraviolet excitation devices 16 are connected by a flexible cable 21, adjacent ozone aeration pipes 12 are connected by an ozone flexible connecting pipe 22, adjacent oxidant solution diffusion pipes 13 are connected by an oxidant solution flexible connecting pipe 23, and adjacent air aeration pipes 14 are connected by an air aeration flexible connecting pipe 24. Thus, multiple pretreatment modules can be arranged in the water area according to the required shape to improve the uniformity of water treatment.

[0070] Furthermore, the end of the flexible frame 2 is connected to a connecting sealing plate 25, which is provided with a water outlet hole. The flexible frame 2 is also provided with several pipe connection ports and power connection ports. The ozone flexible connection pipe 22, the oxidant solution flexible connection pipe 23 and the air aeration flexible connection pipe 24 pass through the corresponding pipe connection ports, and the flexible cable 21 passes through the power connection port.

[0071] Specifically, the liquid inlet module 11 includes a liquid inlet suction pump 111 installed on the lower liquid inlet mixing chamber. The outlet of the liquid inlet suction pump 111 is connected to a liquid inlet distribution pipe 112, which is located within the lower liquid inlet mixing chamber. The inlet of the liquid inlet suction pump 111 is connected to a hollow universal joint 113, and a liquid inlet suction port 114 is connected to the universal joint 113. The liquid inlet suction pump 111 draws external water from the liquid inlet suction port 114 through the universal joint 113 into the liquid inlet distribution pipe 112, and the liquid inlet distribution pipe 112 sprays the water evenly into the lower liquid inlet mixing chamber.

[0072] Furthermore, a water quality sensor 18 is also installed on the pretreatment chamber 1. The water quality sensor 18 is used to detect ammonia nitrogen, conductivity, total phosphorus, pH, DO, temperature, etc.

[0073] Furthermore, several structural levitation modules 19 are connected to the side wall of the pretreatment tank 1. The structural levitation modules 19 can lift the pretreatment modules to a predetermined height for treating water at a specific location. Each structural levitation module 19 includes a two-degree-of-freedom omnidirectional steering mechanism 191 connected to the side wall of the pretreatment tank 1. The output end of the omnidirectional steering mechanism 191 is connected to a levitation power device 192, and the output end of the levitation power device 192 is connected to a propulsion device 193.

[0074] The water distribution structure 15 includes a water distribution pipe connected to a partition between the lower liquid inlet mixing chamber and the upper ultraviolet reaction chamber. A water distribution pump is installed on the water distribution pipe. The water distribution pump can pump the liquid inlet mixing chamber from the lower chamber into the upper ultraviolet reaction chamber.

[0075] The lower liquid inlet mixing chamber is equipped with several lower support frames, and the ozone aeration pipe 12, oxidant solution diffusion pipe 13, and air aeration pipe 14 are installed in the lower liquid inlet mixing chamber through the lower support frames. The upper ultraviolet reaction chamber is equipped with several upper support frames, and the ultraviolet excitation device 16 is installed in the upper ultraviolet reaction chamber through the upper support frames.

[0076] 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 pretreatment module for an in-situ remediation device for soil on a water body substrate, characterized in that: The system includes a pretreatment chamber (1), which contains a lower liquid inlet mixing chamber and an upper ultraviolet reaction chamber. A liquid inlet module (11) is installed on the lower liquid inlet mixing chamber, and an ozone aeration pipe (12), an oxidant solution diffusion pipe (13), and an air aeration pipe (14) are installed inside the lower liquid inlet mixing chamber. A water distribution structure (15) 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 (16) is installed in the upper ultraviolet reaction chamber, and a pretreatment outlet is provided on the upper ultraviolet reaction chamber. The liquid inlet module (11) includes a liquid inlet suction pump (111) installed on the lower liquid inlet mixing chamber. The outlet of the liquid inlet suction pump (111) is connected to a liquid inlet distribution pipe (112). The liquid inlet distribution pipe (112) is located in the lower liquid inlet mixing chamber. The inlet of the liquid inlet suction pump (111) is connected to a hollow universal joint (113). The universal joint (113) is connected to a liquid inlet suction port (114). The pretreatment tank (1) is also equipped with a water quality detection sensor (18); Several structural suspension modules (19) are connected to the side wall of the pretreatment box (1). The structural suspension module (19) includes a universal steering mechanism (191) with two degrees of freedom connected to the side wall of the pretreatment box (1). The output end of the universal steering mechanism (191) is connected to a suspension power device (192), and the output end of the suspension power device (192) is connected to a propulsion device (193).

2. The pretreatment module of the in-situ remediation device for water body substrate soil according to claim 1, characterized in that: The number of pretreatment chambers (1) is at least two. A flexible frame (2) is connected between adjacent pretreatment chambers (1). A flexible cable (21) is connected between the ultraviolet excitation devices (16) of adjacent pretreatment chambers (1). An ozone flexible connecting pipe (22) is connected between the ozone aeration pipes (12) of adjacent pretreatment chambers (1). An oxidant solution flexible connecting pipe (23) is connected between the oxidant solution diffusion pipes (13) of adjacent pretreatment chambers (1). An air aeration flexible connecting pipe (24) is connected between the air aeration pipes (14) of adjacent pretreatment chambers (1).

3. The pretreatment module of the in-situ remediation device for water body substrate soil according to claim 2, characterized in that: The flexible frame (2) is connected to a connecting sealing plate (25) at its end. The connecting sealing plate (25) is provided with a water outlet. The flexible frame (2) is also provided with several pipe connection ports and power connection ports. The ozone flexible connection pipe (22), the oxidant solution flexible connection pipe (23) and the air aeration flexible connection pipe (24) pass through the corresponding pipe connection ports respectively. The flexible cable (21) passes through the power connection port.

4. The pretreatment module of the in-situ remediation device for water body substrate soil according to claim 1, characterized in that: The water distribution structure (15) includes a water distribution pipe, which is connected to the partition between the lower liquid mixing chamber and the upper ultraviolet reaction chamber, and a water distribution pump is installed on the water distribution pipe.

5. The pretreatment module of the in-situ remediation device for water body substrate soil according to claim 1, characterized in that: The lower liquid inlet mixing chamber is fixed with several lower support frames. The ozone aeration pipe (12), the oxidant solution diffusion pipe (13), and the air aeration pipe (14) are installed in the lower liquid inlet mixing chamber through the lower support frames.

6. The pretreatment module of the in-situ remediation device for water body substrate soil according to claim 1, characterized in that: Several upper support frames are fixed in the upper ultraviolet reaction chamber, and the ultraviolet excitation device (16) is installed in the upper ultraviolet reaction chamber through the upper support frames.

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