A groundwater photocatalytic in-situ remediation device

Abstract

The application provides a groundwater photocatalytic in-situ remediation device, and belongs to the technical field of groundwater remediation. The device comprises an in-situ remediation tank, an in-situ mounting frame arranged in the in-situ remediation tank along the width direction, a photocatalytic assembly arranged on the in-situ mounting frame, and a power assembly connected with the photocatalytic assembly. The in-situ mounting frame is mounted in the in-situ remediation tank in a splicing manner, and the photocatalytic assembly is mounted on the upper end of the in-situ mounting frame. The groundwater is subjected to multi-point photocatalytic remediation. Meanwhile, the coverage area of the photocatalytic reaction can be adjusted by adjusting the splicing number of the sub-mounting frames, so that more contaminated water bodies can be treated, thereby improving the overall remediation efficiency. When it is necessary to adjust the depth at which the optical fiber load rod is inserted into the groundwater, the extension of the hydraulic drive member drives the light cover and the optical fiber load rod to move downward synchronously, so that each optical fiber load rod can reach the predetermined depth, which is crucial for the efficiency of the photocatalytic process.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of groundwater remediation, and specifically relates to a groundwater photocatalytic in-situ remediation device. BACKGROUND

[0002] Groundwater pollution is a phenomenon of deterioration of groundwater quality caused by human factors. Due to the complex structure of the stratum below the ground, the flow of groundwater is hindered, so groundwater pollution has the characteristics of slow process, strong concealment and difficult governance. Industrial, agricultural and domestic sewage is injected directly and penetrates into the aquifer medium and slowly releases into the surrounding water, so even if the pollution source is excluded, the pollutants that have entered the aquifer will still have a long-term adverse effect.

[0003] The existing in-situ remediation method for groundwater pollution includes physical shielding technology, aeration technology, electrokinetic remediation technology, biological technology and permeable reactive barrier technology. The existing technology needs a large amount of chemical reagents and expensive equipment investment when remedying groundwater pollution, which is easy to cause secondary pollution to groundwater. The excess treatment agent after the degradation of the target pollutants is difficult to recycle and will cause other pollution. Due to the complex structure of groundwater, many pollutants exist not only in the water environment but also in the surrounding aquifer medium, so only the treatment of the water body cannot eradicate groundwater pollution.

[0004] The photocatalytic in-situ remediation method does not need additional chemical reagent investment, only uses pollution-free semiconductor photocatalytic materials, and places photocatalytic optical fiber devices in different media to achieve the purpose of degrading pollutants in different media, which greatly avoids the tailing and rebound effect after remediation. There are few cases of applying photocatalytic technology to groundwater pollution treatment in the prior art, and therefore, there is an urgent need for a groundwater photocatalytic in-situ remediation technology. SUMMARY

[0005] In view of the above problems, the application provides a groundwater photocatalytic in-situ remediation device.

[0006] The technical scheme of the application is as follows: a groundwater photocatalytic in-situ remediation device, comprising an in-situ remediation tank, an in-situ mounting frame arranged in the in-situ remediation tank in a width direction, a photocatalytic assembly arranged on the in-situ mounting frame, and a power assembly connected with the photocatalytic assembly.

[0007] A water guide door assembly is arranged at the water inlet side of the in-situ remediation tank, the water guide door assembly is composed of two water guide doors symmetrically arranged at the water inlet side of the in-situ remediation tank, and each water guide door is connected with the in-situ remediation tank through an elastic rod. The water guide door comprises an inclined water guide section and a horizontal water guide section parallel to the length direction of the in-situ remediation tank, and the horizontal water guide section is connected with the inner wall of the in-situ remediation tank through an elastic rod.

[0008] The in-situ mounting frame is spliced by multiple sub-mounting frames, the photocatalytic assembly comprises multiple mounting plates connected with the sub-mounting frames one by one, an LED lamp row arranged at the bottom end of the mounting plate, a light collector arranged at the periphery of the LED lamp row and provided with multiple light emitting holes in a matrix distribution at the bottom end, multiple optical fiber load rods arranged at the light emitting holes, and an arc-shaped reflective film arranged at the bottom end of each optical fiber load rod, and an optical fiber light guide block is arranged at the upper end of each optical fiber load rod and inside the light collector.

[0009] The power supply assembly is electrically connected with the LED lamp row.

[0010] Further, the elastic rod comprises a fixed cylinder with one end connected with the inner wall of the in-situ repair groove and the other end in an open structure, a moving adjusting cylinder with one end extending into the inside of the open structure and the other end connected with the side wall of the water guide door, and a compression spring arranged in the open structure and connected with the moving adjusting cylinder, and multiple sliding blocks are uniformly arranged on the outer wall of the moving adjusting cylinder in the circumferential direction, and the inner wall of the fixed cylinder is provided with sliding grooves in one-to-one correspondence with the sliding blocks.

[0011] When the underground water in the aquifer flows through the water guide door and compresses the elastic rod, the water guide door moves towards the side close to the inner wall of the in-situ repair groove, at this time, the moving adjusting cylinder compresses the compression spring, and the sliding blocks slide in the corresponding sliding grooves, limiting the direction of the force exerted by the moving adjusting cylinder on the compression spring, on the one hand, ensuring stable transmission of the force and reducing the probability of damage or performance degradation of the water guide door caused by unstable force, and effectively dispersing and absorbing the pressure of the aquifer medium, on the other hand, being limited in the inner wall of the fixed cylinder by the compression spring, avoiding long-term erosion of the water flow and reducing the service life.

[0012] Further, the in-situ repair groove is provided with two horizontal sliding installation strips parallel to each other at the front and rear sides, the horizontal sliding installation strips are provided with horizontal sliding grooves, two opposite distribution side walls of the sub-mounting frame are provided with sliding strips, and the remaining two opposite distribution side walls are provided with sliding connection grooves, the sliding strips on each sub-mounting frame close to the horizontal sliding installation strips are in sliding connection with the horizontal sliding grooves, the horizontal sliding grooves are provided with limiting sliding blocks, and the limiting sliding blocks are fixedly connected with the horizontal sliding grooves through bolts at the upper and lower ends.

[0013] Illustration: when splicing the sub-mounting racks in the in-situ repair groove, first, slide one of the sliding bars on the first sub-mounting rack with the horizontal sliding groove, then take the second sub-mounting rack and slide the sliding bar on the side wall thereof with the sliding connection groove on the side wall of the first sub-mounting rack, then take the third sub-mounting rack and slide the sliding bar on the side wall thereof with the horizontal sliding groove, and slide the sliding connection groove on the side wall thereof with the sliding bar on the side wall of the second sub-mounting rack, complete the connection of the sub-mounting racks in the first horizontal sliding groove according to the above steps, and limit and fix the sub-mounting racks at the opposite end positions by the sliding limit block, increase the installation compactness of each sub-mounting rack, repeat the above steps to complete the connection of the sub-mounting racks in the second horizontal sliding groove, and connect the corresponding sub-mounting racks on the first horizontal sliding groove with the corresponding sub-mounting racks on the second horizontal sliding groove at the opposite sides during installation, that is, complete the installation of the entire in-situ mounting rack, and connect the photocatalytic components on each sub-mounting rack to perform multi-point photocatalytic repair on the groundwater, and at the same time, the coverage area of the photocatalytic reaction can be adjusted by adjusting the splicing quantity of the sub-mounting racks, so that more contaminated water bodies can be treated, thereby improving the overall repair efficiency.

[0014] Further, the upper and lower ends of the intersection of each sub-mounting rack are provided with reinforcing connection plates, and the two reinforcing connection plates at the upper and lower ends are fixedly connected through threaded rods.

[0015] Illustration: when the installation of the entire in-situ mounting rack is completed, the reinforcing connection plates are installed at the upper and lower ends of the intersection of each sub-mounting rack, which greatly increases the connection compactness between adjacent sub-mounting racks and improves the use reliability of the in-situ mounting rack.

[0016] Further, the upper end of the mounting plate and the corresponding sub-mounting rack is connected through an extension rod, the upper end of the mounting plate is movably connected with a connecting main plate through a hydraulic driving member, and the bottom end of the connecting main plate is movably connected with each mounting plate.

[0017] Illustration: when the depth of each optical fiber load rod inserted into the groundwater needs to be adjusted, the connecting main plate is driven to move downward by the extension of the hydraulic driving member, at this time, the mounting plate, the light cover and the optical fiber load rod are synchronously moved downward by the movable connection of the connecting main plate, and the extension rod is connected with the upper end of the sub-mounting rack during the movement of the mounting plate, which is to limit the movement direction of each mounting plate and improve the stability of the mounting plate, the light cover and the optical fiber load rod during movement, so as to ensure that each optical fiber load rod can reach the predetermined depth, which is crucial for the efficiency of the photocatalytic process.

[0018] Further, the optical fiber loading rod comprises a polymer optical fiber carrier, a silica film arranged on the outer wall of the polymer optical fiber carrier, and a loading material layer loaded outside the silica film.

[0019] Description: The light emitted by the LED lamp row is guided by the polymer optical fiber carrier, and the guided light energy is emitted from the side, and the photocatalytic effect is enhanced through the synergistic effect of the silica film and the loading material layer, thereby improving the photocatalytic repair effect on the underground polluted water source.

[0020] Further, the material of the loading material layer is a BiOBr catalyst.

[0021] Description: The polymer optical fiber carrier has strong absorption to ultraviolet light but weak absorption to visible light, and therefore the BiOBr catalyst can make good use of the visible light guiding performance of the polymer optical fiber, the BiOBr catalyst can decompose organic pollutants into harmless substances by using light energy, the BiOBr catalyst is responsible for absorbing light energy and generating electron-hole pairs, and these electron-hole pairs and their active species derivatives can participate in redox reactions to mineralize or degrade organic pollutants in underground water into small molecular substances or inorganic ions, thereby improving the photocatalytic repair effect on the underground polluted water source.

[0022] Further, the bottom end of the optical fiber loading rod is connected with an arc-shaped reflecting plate through a connecting rod, the upper end of the arc-shaped reflecting plate is provided with a micro-prism film, and the arc-shaped reflecting plate is movably connected with the connecting rod.

[0023] Description: The remaining light after being reflected by the arc-shaped reflecting plate is reflected again, so that the light is fully emitted from the side of the loading material layer, the loss of light is reduced, the utilization effect of light energy is improved, the reflected light is concentrated on the surface of the loading material layer, the light intensity is increased, and the photocatalytic reaction is accelerated, and meanwhile, the micro-prism film is composed of micro prisms, which can effectively refract and reflect light, so as to change the propagation path of the light.

[0024] Further, the power supply assembly comprises a solar cell panel, a battery pack connected with the solar cell panel, an inverter connected with the battery pack, and the battery pack is electrically connected with the LED lamp row.

[0025] Description: The solar cell panel converts solar energy into electric energy, the battery pack stores the electric energy generated by the solar cell panel, and the inverter converts the direct current of the battery pack into alternating current for use of various electrical equipment, thereby avoiding the consumption of additional electric energy and avoiding the dependence on external power grid, which is particularly important for underground water repair in remote areas.

[0026] Compared with the prior art, the present application has the following advantages:

[0027] The groundwater photocatalytic in-situ remediation device of the application uses a polymer optical fiber carrier as a light guide device to transmit light energy to the surface of the catalyst material for photocatalytic degradation of pollutants under dark groundwater environmental conditions, and before this, there are few cases of applying photocatalytic technology to groundwater pollution treatment; the in-situ mounting frame is mounted in the in-situ remediation tank in a splicing manner, and the photocatalytic assembly is mounted on the upper end of the in-situ mounting frame, so that the groundwater is subjected to multi-point photocatalytic remediation, and at the same time, the coverage area of the photocatalytic reaction can be adjusted by adjusting the splicing number of the sub-mounting frame, so that more contaminated water bodies are treated, thereby improving the overall remediation efficiency; when it is necessary to adjust the depth of the optical fiber load rod inserted into the groundwater, the extension of the hydraulic drive member drives the connecting main plate to move downward, at this time, each mounting plate movably connected with the connecting main plate also drives the light cover and the optical fiber load rod to move downward synchronously, so that each optical fiber load rod can reach the predetermined depth, which is crucial for the efficiency of the photocatalytic process; the use of solar cells as a power supply device avoids the consumption of additional electric energy, and at the same time, the problem that sunlight cannot directly irradiate the groundwater environment is solved;

[0028] The groundwater photocatalytic in-situ remediation device of the application only needs inexpensive polymer optical fibers and low-power LED light sources when in use, does not need to use expensive instruments and equipment, can use solar cells for power supply, normally operates in areas without power grid coverage, does not need to invest additional chemical reagents, only uses pollution-free and environmentally friendly catalyst materials, is completely harmless to the groundwater environment, places the photocatalytic assembly in different media to achieve the purpose of degrading pollutants in different media, greatly avoids the tailing and rebound effect after remediation, and can degrade most organic pollutants in the groundwater environment. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a top view of the in-situ remediation tank of the application;

[0030] Figure 2 is a schematic view of the overall structure of the application;

[0031] Figure 3 is a schematic view of the structure of the mounting plate when two adjacent sub-mounting frames are connected;

[0032] Figure 4 is a schematic view of the Figure 3 enlarged view of A of the application;

[0033] Figure 5 is a schematic view of the connection structure of the mounting plate and the sub-mounting frame of the application;

[0034] Figure 6 is a schematic view of the structure of the elastic rod of the application;

[0035] Figure 7is a schematic view of a connecting structure of two adjacent sub-mounts of the present application;

[0036] Figure 8 is a schematic view of a structure of the optical fiber loading rod of the present application;

[0037] Wherein, 1 is an in-situ repair groove, 10 is a water guide door assembly, 11 is a water guide door, 110 is an elastic rod, 111 is a fixed cylinder, 112 is a movable adjusting cylinder, 113 is a compression spring, 114 is a sliding block, 115 is a sliding groove, 116 is a sealing ring, 12 is an inclined water guide section, 13 is a horizontal water guide section, 130 is a reinforcing connecting rod, 14 is a horizontal sliding mounting strip, 140 is a horizontal sliding groove, 141 is a limiting sliding block, 15 is a mounting rack, 150 is a hydraulic drive part, 151 is a connecting main plate, 2 is an in-situ mounting rack, 20 is a sub-mount, 200 is a sliding strip, 201 is a sliding connecting groove, 21 is a reinforcing connecting plate, 23 is a threaded rod, 3 is a photocatalytic assembly, 30 is a mounting plate, 31 is an LED light row, 32 is a light collector, 320 is a light emitting hole, 33 is an optical fiber loading rod, 330 is a polymer optical fiber carrier, 331 is a silica film, 332 is a loading material layer, 333 is a connecting rod, 334 is an arc-shaped reflecting plate, 335 is a micro-prism film, 34 is an arc-shaped reflecting film, 35 is an optical fiber light guide block, 36 is an extension rod, 4 is a power supply assembly, 40 is a solar cell panel, 41 is a battery pack, and 42 is an inverter. DETAILED DESCRIPTION

[0038] In order to further understand the content of the present application, the present application is described in detail through the following examples.

[0039] Example 1

[0040] As shown in Figure 1 , 2 , an underground water photocatalytic in-situ repair device includes an in-situ repair groove 1, an in-situ mounting rack 2 arranged in the in-situ repair groove 1 along the width direction, a photocatalytic assembly 3 arranged on the in-situ mounting rack 2, and a power supply assembly 4 connected with the photocatalytic assembly 3.

[0041] A water guide gate assembly 10 is provided on the water inlet side of the in-situ repair tank 1. The water guide gate assembly 10 is composed of two water guide gates 11 symmetrically distributed on the water inlet side of the in-situ repair tank 1. Each water guide gate 11 is connected to the in-situ repair tank 1 via an elastic rod 110. The water guide gate 11 includes an inclined water guide section 12 and a horizontal water guide section 13 parallel to the length direction of the in-situ repair tank 1. The horizontal water guide section 13 is connected to the inner wall of the in-situ repair tank 1 via the elastic rod 110. A reinforcement connecting rod 130 is provided between the inclined water guide section 12 and the horizontal water guide section 13 to increase the connection reliability between the inclined water guide section 12 and the horizontal water guide section 13 and avoid damage caused by excessive pressure of the aquifer medium. The outer walls of the inclined water guide section 12, the horizontal water guide section 13 and the reinforcement connecting rod 130 are sprayed with epoxy resin material.

[0042] like Figure 6 As shown, the elastic rod 110 includes a fixed cylinder 111 with one end connected to the inner wall of the in-situ repair groove 1 and the other end of the opening structure, a movable adjustment cylinder 112 with one end extending into the interior of the opening structure and the other end connected to the side wall of the water guide gate 11, and a compression spring 113 arranged in the opening structure and connected to the movable adjustment cylinder 112. The outer wall of the movable adjustment cylinder 112 is evenly provided with four sliding blocks 114 along the circumferential direction. The inner wall of the fixed cylinder 111 is provided with a sliding groove 115 which is slidably connected with the sliding blocks 114 in a one-to-one correspondence. A sealing ring 116 is provided between the fixed cylinder 111 and the movable adjustment cylinder 112, and the material of the sealing ring 116 is butyl rubber. When the underground water in the aquifer is When water flows through the water guide gate 11 and compresses the elastic rod 110, the water guide gate 11 moves toward the inner wall side of the in-situ repair groove 1. At this time, the movable adjustment cylinder 112 compresses the compression spring 113 and slides in the corresponding sliding groove 115 through the sliding block 114, thereby limiting the direction of the force applied by the movable adjustment cylinder 112 to the compression spring 113. On the one hand, this ensures stable transmission of force and reduces the probability of damage or performance degradation of the water guide gate 11 due to unstable force, thereby effectively dispersing and absorbing the pressure of the aquifer medium. On the other hand, the compression spring 113 is limited to the inner wall of the fixed cylinder 111 to prevent long-term erosion by water flow and reduce its service life.

[0043] like Figure 2 、 3 As shown, the in-situ mounting frame 2 is composed of eight sub-mounting frames 20, and the photocatalytic assembly 3 includes eight mounting plates 30 connected to each sub-mounting frame 20 in a one-to-one correspondence, an LED light row 31 provided at the bottom end of the mounting plate 30, a light collecting cover 32 provided at the periphery of the LED light row 31 and having 16 light-emitting holes 320 distributed in a matrix at the bottom end, 16 optical fiber load rods 33 provided at each light-emitting hole 320, and an arc-shaped reflective film 34 provided at the bottom end of each optical fiber load rod 33. An optical fiber light guide block 35 is provided at the upper end of each optical fiber load rod 33 and located inside the light collecting cover 32. The LED light row 31 and the optical fiber light guide block 35 adopt existing technology.

[0044] As shown in Figure 8 , the optical fiber load rod 33 includes a polymer optical fiber carrier 330, a silica film 331 arranged on the outer wall of the polymer optical fiber carrier 330, and a load material layer 332 loaded on the outside of the silica film 331, and the material of the load material layer 332 is a BiOBr catalyst. The silica film 331 is loaded on the outer wall of the polymer optical fiber carrier 330 by chemical vapor deposition, and the surface of the polymer optical fiber carrier 330 is polished before processing to ensure that the silica film can be uniformly and firmly loaded on the outer wall of the polymer optical fiber carrier, thereby improving the performance and reliability of the polymer optical fiber carrier 330. The load material layer 332 loads the BiOBr photocatalytic material on the silica film 331 by impregnation. The light emitted by the LED lamp row 31 is guided by the polymer optical fiber carrier 330 and is diverged from the side. Through the synergistic effect of the silica film 331 and the load material layer 332, the photocatalytic effect is enhanced, and the photocatalytic repair effect on the underground polluted water source is improved. The BiOBr catalyst can use light energy to decompose organic pollutants into harmless substances. The BiOBr catalyst is responsible for absorbing light energy and generating electron-hole pairs and active species derivatives. These electron-hole pairs and active species derivatives can participate in redox reactions to mineralize or degrade organic pollutants in underground water into small molecular substances or inorganic ions, thereby improving the photocatalytic repair effect on the underground polluted water source.

[0045] As shown in Figure 2 , the power supply assembly 4 includes a solar cell panel 40, a battery pack 41 connected to the solar cell panel 40, and an inverter 42 connected to the battery pack 41. The battery pack 41 is electrically connected to the LED lamp row 31. The solar cell panel 40 converts solar energy into electrical energy. The battery pack 41 stores the electrical energy generated by the solar cell panel 40. The inverter 42 converts the direct current of the battery pack 41 into alternating current for use by various electrical devices, avoiding the consumption of additional electrical energy and not relying on external power grids, which is particularly important for underground water repair in remote areas. Among them, the solar cell panel 40, the battery pack 41 and the inverter 42 all adopt the prior art;

[0046] Among them, the embodiment also discloses a synthesis method of the BiOBr photocatalytic material, which comprises the following steps:

[0047] (1) Take 4mmol Bi(NO3)3·5H2O, add to 6mL ultrapure water, then add 4mL 4M nitric acid solution, ultrasonic for 20min, and mix uniformly to obtain A liquid;

[0048] (2) Take 4mmol KBr, add to 50mL ultrapure water, then add 0.4g Brij35, stir for about 1h, and mix uniformly to obtain B liquid;

[0049] (3) A liquid is added to B liquid at a speed of 1-2 drops / s, stirred evenly, and in the process of adding A liquid, 2M NaOH is used to adjust the pH to 11, and after the addition of A liquid is completed, the pH is adjusted to 10.2, then continue to stir for 1h, obtain the mixed liquid, then pour the mixed liquid into a 100mL polytetrafluoroethylene liner, and package in a reaction kettle, under the condition of temperature 160℃, hydrothermal treatment for 12h, obtain the solid product, then use ultrapure water and anhydrous ethanol to clean the solid product for 3 times respectively, finally, put the solid product into a vacuum oven, under the condition of temperature 60℃, dry and grind, obtain the BiOBr photocatalytic material, wherein, the main reaction product of A liquid and B liquid after mixing is BiOBr, the reaction process is completed by chemical transmission, the critical temperature of water is 374K, at this time, gaseous and liquid water coexist, gaseous or liquid water under high temperature and high pressure as a transmission pressure medium makes BiOBr in the reaction liquid can carry out crystallization reaction under the critical state of water, the surfactant Brij35 can effectively regulate the crystal form of the obtained BiOBr product, the BiOBr photocatalytic material obtained by the hydrothermal method generally has good crystallinity, without further sintering process, can effectively prevent grain growth, avoid impurities in the mixing and sintering process, the above process is prepared under alkaline conditions, the synthesized BiOBr photocatalytic material has darker color and stronger visible light absorption.

[0050] Example 2

[0051] The difference between this embodiment and example 1 is:

[0052] As shown in Figure 1 , 3 , 7, the front and back sides of the in-situ repair groove 1 are provided with two horizontal sliding installation strips 14 parallel to each other, the horizontal sliding installation strip 14 is provided with a horizontal sliding groove 140, the two opposite distributed side walls of the sub-mounting frame 20 are provided with sliding strips 200 and the remaining two opposite distributed side walls are provided with sliding connection grooves 201, the corresponding sliding strips 200 on each sub-mounting frame 20 close to the horizontal sliding installation strip 14 are slidingly connected with the horizontal sliding groove 140, the horizontal sliding groove 140 is provided with a limiting sliding block 141, and the upper and lower ends of the limiting sliding block 141 are fixedly connected with the horizontal sliding groove 140 through bolts;

[0053] The upper and lower ends of the intersection of each sub-mounting frame 20 are provided with reinforcing connection plates 21, and the two reinforcing connection plates 21 between the upper and lower ends are fixedly connected through threaded rods 23;

[0054] In situ repair groove 1 splicing sub-mount 20, first, the first sub-mount 20 on one of the sliding bar 200 and horizontal sliding groove 140 sliding connection, then, take the second sub-mount 20 and its side wall sliding bar 200 and the first sub-mount 20 side wall sliding connection groove 201 sliding connection, then, take the third sub-mount 20 and its side wall sliding bar 200 and horizontal sliding groove 140 sliding connection, its side wall sliding connection groove 201 and the second sub-mount 20 side wall sliding bar 200 connection, according to the above steps, the first horizontal sliding groove 140 in several sub-mount 20 connection, sliding limit sliding block 141 makes its end position of the sub-mount 20 limit fixed, increase the installation of each sub-mount 20 compactness, repeat the above steps, the second horizontal sliding groove 140 in several sub-mount 20 connection, in the installation of the same time, the first horizontal sliding groove 140 on the corresponding each sub-mount 20 and the second horizontal sliding groove 140 on the corresponding each sub-mount 20 opposite side connection, that is, the whole in situ installation rack 2 installation is completed;

[0055] Through the connection of each sub-mount 20 on the photocatalytic assembly 3, the groundwater is treated by multi-point photocatalytic repair, at the same time, by adjusting the splicing quantity of the sub-mount 20, the coverage area of the photocatalytic reaction can be adjusted, so that more contaminated water bodies can be treated, thereby improving the overall repair efficiency.

[0056] Example 3

[0057] The difference between this embodiment and example 2 is:

[0058] As shown in Figure 2 , 5 , the mounting plate 30 is connected with the upper end of the corresponding sub-mount 20 through the telescopic rod 36, the in situ repair groove 1 is provided with a mounting rack 15 at the upper end, the mounting rack 15 is connected with a connecting main plate 151 at the bottom end through a hydraulic driving part 150, and the bottom end of the connecting main plate 151 is movably connected with the upper end of each mounting plate 30. Among them, the hydraulic driving part 150 adopts the existing hydraulic cylinder or hydraulic motor. When it is necessary to adjust the depth of the insertion of each optical fiber load rod 33 into the groundwater, the connecting main plate 151 is driven to move downward by the extension of the hydraulic driving part 150. At this time, each mounting plate 30 movably connected with the connecting main plate 151 also drives the light collector 32 and the optical fiber load rod 33 to move synchronously. In the process of moving the mounting plate 30, the mounting plate 30 is connected with the upper end of the sub-mount 20 through the telescopic rod 36. The purpose is to limit the movement direction of each mounting plate 30, improve the stability of the mounting plate 30, the light collector 32 and the optical fiber load rod 33 during movement, and ensure that each optical fiber load rod 33 can reach the predetermined depth, which is crucial to the efficiency of the photocatalytic process.

[0059] Example 4

[0060] The difference between this embodiment and embodiment 3 is that:

[0061] As shown in Figure 4 , 8 , the bottom end of the optical fiber load rod 33 is connected with an arc-shaped reflecting plate 334 through a connecting rod 333, the upper end of the arc-shaped reflecting plate 334 is provided with a micro-prism film 335, and the arc-shaped reflecting plate 334 is movably connected with the connecting rod 333. The shape of the arc-shaped reflecting plate 334 is a free curved surface shape, which is not limited to an arc shape. The arc-shaped reflecting film 34 is reflected by the arc-shaped reflecting plate 334, and the remaining light is reflected again, so that the light is fully emitted from the side of the load material layer 332, reducing the loss of light and improving the utilization effect of light energy. The reflected light is concentrated on the surface of the load material layer 332, increasing the light intensity, which helps to accelerate the photocatalytic reaction. At the same time, the micro-prism film 335 is composed of micro-prisms, which can effectively refract and reflect light, thereby changing the propagation path of the light. The arc-shaped reflecting plate 334 and the micro-prism film 335 are both existing technologies.

[0062] The use method of the groundwater photocatalytic in-situ remediation device of the embodiment includes the following steps:

[0063] S1, drilling at the site where groundwater remediation is needed, placing the in-situ remediation tank 1 in the well, and splicing the sub-mounting frame 20 in the in-situ remediation tank 1. First, one of the sliding bars 200 on the first sub-mounting frame 20 is slidably connected with the horizontal sliding groove 140, then the second sub-mounting frame 20 is taken and the sliding bar 200 on the side wall thereof is slidably connected with the sliding connection groove 201 on the side wall of the first sub-mounting frame 20, then the third sub-mounting frame 20 is taken and the sliding bar 200 on the side wall thereof is slidably connected with the horizontal sliding groove 140, and the sliding connection groove 201 on the side wall thereof is connected with the sliding bar 200 on the side wall of the second sub-mounting frame 20. According to the above steps, the connection of the several sub-mounting frames 20 in the first horizontal sliding groove 140 is completed, the sliding limiting sliding block 141 limits and fixes the sub-mounting frame 20 at the opposite end position, and the above steps are repeated to complete the connection of the several sub-mounting frames 20 in the second horizontal sliding groove 140. While installing, the opposite sides of each sub-mounting frame 20 on the first horizontal sliding groove 140 are connected with each sub-mounting frame 20 on the second horizontal sliding groove 140, that is, the installation of the entire in-situ mounting frame 2 is completed.

[0064] S2, install the mounting plate 30 on each sub-mount 20 through the telescopic rod 36, and drive the connecting plate 151 to move downward through the extension of the hydraulic drive 150. At this time, each mounting plate 30 connected with the connecting plate 151 also drives the light cover 32 and the optical fiber load rod 33 to move downward synchronously. When the bottom end of the optical fiber load rod 33 is immersed in the underground aquifer, the hydraulic drive 150 is closed;

[0065] S3, turn on the LED light row 31. The light emitted by the LED light row 31 enters the corresponding optical fiber load rod 33 through the optical fiber light guide block 35, and is emitted from the side. Through the synergistic effect of the silica film 331 and the load material layer 332, the pollutants in the groundwater are subjected to photocatalytic reaction. At the same time, the light emitted from the bottom end of the polymer optical fiber carrier 330 is reflected to the silica film 331 and the load material layer 332 on the side wall through the arc-shaped reflecting film 34. The remaining light after being reflected by the arc-shaped reflecting film 34 is reflected again through the arc-shaped reflecting plate 334, so that the light is fully emitted from the side of the load material layer 332, reducing the loss of light.

Claims

1. A groundwater photocatalytic in-situ remediation device, characterized by, The utility model relates to a kind of in-situ repair groove (1), in-situ mounting frame (2) is provided in the in-situ repair groove (1) along width direction, photocatalysis assembly (3) is provided on the in-situ mounting frame (2), power supply assembly (4) is connected with the photocatalysis assembly (3); Water inlet side of in-situ repair groove (1) is equipped with water guide door assembly (10), the water guide door assembly (10) is by two water guide doors (11) symmetrically distributed in the water inlet side of in-situ repair groove (1), and each water guide door (11) is connected with in-situ repair groove (1) by elastic rod (110); The in-situ mounting frame (2) is spliced by multiple sub-mounting frames (20), the photocatalysis assembly (3) includes multiple mounting plates (30) connected one by one with each sub-mounting frame (20), LED lamp row (31) provided at the bottom end of the mounting plate (30), light shield (32) provided at the periphery of the LED lamp row (31) and provided with multiple light emitting holes (320) in matrix distribution at the bottom end, multiple optical fiber load rods (33) provided at each light emitting hole (320), and arc-shaped reflective film (34) provided at the bottom end of each optical fiber load rod (33), each optical fiber load rod (33) is provided with optical fiber light guide block (35) at the upper end and inside the light shield (32); The power supply assembly (4) is electrically connected with the LED lamp row (31); The optical fiber load rod (33) includes a polymer optical fiber carrier (330), a silicon dioxide film (331) provided on the outer wall of the polymer optical fiber carrier (330), and a load material layer (332) loaded outside the silicon dioxide film (331). The load material layer (332) is made of BiOBr catalyst.

2. The groundwater photocatalytic in-situ remediation device according to claim 1, characterized in that, The elastic rod (110) includes a fixed cylinder (111) connected with the inner wall of the in-situ repair groove (1) at one end and having an open structure at the other end, a moving adjustment cylinder (112) extending into the open structure at one end and connected with the side wall of the water guide door (11) at the other end, a compression spring (113) provided in the open structure and connected with the moving adjustment cylinder (112), multiple sliding blocks (114) uniformly provided on the outer wall of the moving adjustment cylinder (112) in the circumferential direction, and a sliding groove (115) provided on the inner wall of the fixed cylinder (111) and slidably connected with the sliding blocks (114) one by one.

3. The groundwater photocatalytic in-situ remediation device of claim 1, wherein, The in-situ repair groove (1) is provided with two horizontal sliding mounting strips (14) parallel to each other at the front and rear sides, the horizontal sliding mounting strip (14) is provided with a horizontal sliding groove (140) inside, two opposite side walls of the sub-mounting frame (20) are provided with a sliding strip (200), and the remaining two opposite side walls are provided with a sliding connection groove (201), the sliding strip (200) on each sub-mounting frame (20) near the horizontal sliding mounting strip (14) is slidably connected with the horizontal sliding groove (140), a limiting sliding block (141) is provided inside the horizontal sliding groove (140), and the limiting sliding block (141) is fixedly connected with the horizontal sliding groove (140) by bolts at the upper and lower ends.

4. The groundwater photocatalytic in-situ remediation device of claim 2, wherein, The upper and lower ends of the intersection of each of the sub-mounting frames (20) are provided with reinforcing connecting plates (21), and two reinforcing connecting plates (21) at the upper and lower ends are fixedly connected through threaded rods (23).

5. The groundwater photocatalytic in-situ remediation device of claim 1, wherein, The mounting plate (30) is connected with the upper end of the corresponding sub-mounting frame (20) through an expansion rod (36), the in-situ repair groove (1) is provided with a mounting frame (15) at the upper end, the mounting frame (15) is connected with a connecting main plate (151) at the bottom through a hydraulic drive (150), and the connecting main plate (151) is movably connected with the upper end of each mounting plate (30).

6. The groundwater photocatalytic in-situ remediation device of claim 1, wherein, The bottom end of the optical fiber load rod (33) is connected with an arc-shaped reflecting plate (334) through a connecting rod (333), the arc-shaped reflecting plate (334) is provided with a micro-prism film (335) at the upper end, and the arc-shaped reflecting plate (334) is movably connected with the connecting rod (333).

7. The groundwater photocatalytic in-situ remediation device of claim 1, wherein, The power supply assembly (4) comprises a solar cell panel (40), a battery pack (41) connected with the solar cell panel (40), an inverter (42) connected with the battery pack (41), and the battery pack (41) is electrically connected with the LED lamp row (31).

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