Ultrasonic piezoelectric catalysis-permeable reactive barrier underground water remediation device

Abstract

The invention discloses an ultrasonic piezoelectric catalysis-permeable reactive barrier underground water remediation device, and relates to the technical field of underground wastewater remediation, the ultrasonic piezoelectric catalysis-permeable reactive barrier underground water remediation device comprises a reaction wall body, a plurality of inner containing cavities are formed in the side face of the reaction wall body at equal intervals, the reaction wall body is provided with a containing cavity on one side of the inner containing cavities, and a butt joint frame is fixedly connected in the containing cavity; a mounting frame is contained in the inner containing cavity, an ultrasonic piezoelectric catalysis assembly is arranged in the mounting frame, and a large number of active oxygen species are generated in the mounting frame through excitation; according to the device, the ultrasonic generation terminal, the piezoelectric catalytic layer, the flow guide plate and the multi-stage filter screen are integrated in the replaceable mounting frame, and the piezoelectric catalytic layer is excited by ultrasonic vibration to generate a large number of active oxygen species, so that efficient oxidative degradation of pollutants in underground water is realized. The guide plates and the guide grooves can regulate and control the water flow state, so that the retention time of water in a catalytic area is prolonged, and the contact area with a catalytic material is increased.

Description

Technical Field

[0001] This invention relates to the field of underground wastewater remediation technology, and in particular to an ultrasonic piezoelectric catalytic-permeable reactive wall groundwater remediation device. Background Technology

[0002] Estrogen-like endocrine disruptors are a class of exogenous chemical substances that can mimic or block the effects of natural estrogens. These include phenols, steroid hormones, and synthetic estrogens. They are widely found in plastic additives, pesticides, livestock and poultry wastewater, and pharmaceutical industry emissions, and enter environmental water bodies through surface runoff, infiltration, and atmospheric deposition. Due to their structural similarity to natural hormones, even trace exposure can disrupt the endocrine system, leading to health risks such as reproductive abnormalities, developmental disorders, and hormone-related cancers. Groundwater, which is widely relied upon in rural my country, is also affected by these pollutants, and the potential hazards cannot be ignored.

[0003] Commonly used groundwater organic matter remediation technologies are mainly divided into in-situ chemical oxidation technology, bioremediation technology, and extraction treatment technology. In-situ chemical oxidation technology requires the addition of oxidants to groundwater, but the dosage of oxidants is difficult to determine and the oxidants are easily unevenly distributed in groundwater, which may cause secondary pollution. Bioremediation technology uses plants or microorganisms to degrade organic matter. In practical applications, the remediation cycle is long, the environmental conditions are high, and it is difficult to meet the requirements for efficient degradation of new pollutants. Extraction technology has high energy consumption and often suffers from problems such as pollutant rebound. Summary of the Invention

[0004] The purpose of this invention is to address the existing groundwater organic matter remediation technologies, which are mainly divided into in-situ chemical oxidation, bioremediation, and extraction technologies. In-situ chemical oxidation requires the addition of oxidants to groundwater, but the dosage of oxidants is difficult to determine and the oxidants are easily unevenly distributed in the groundwater, potentially causing secondary pollution. Bioremediation uses plants or microorganisms to degrade organic matter, but in practical applications, the remediation cycle is long, environmental conditions are demanding, and it is difficult to meet the requirements for efficient degradation of new pollutants. Extraction technologies have high energy consumption and often suffer from problems such as pollutant rebound. Therefore, the proposed ultrasonic piezoelectric catalytic-permeable reactive wall groundwater remediation device is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An ultrasonic piezoelectric catalytic-permeable reactive wall groundwater remediation device includes a reactive wall body. Multiple internal cavities are equidistantly arranged on the side of the reactive wall body. A receiving cavity is provided on one side of the internal cavity of the reactive wall body. A docking frame is fixedly connected in the receiving cavity. The internal cavity accommodates an installation frame. An ultrasonic piezoelectric catalytic component is arranged in the installation frame, and a large number of active oxygen species are excited and generated in the installation frame. The reaction wall has a bottom cavity at the bottom of the receiving cavity. A right-angle folding plate is fixedly connected to the bottom of the inner cavity of the docking frame. A bottom box is fixedly connected to one end of the right-angle folding plate. A quick-release assembly is provided in the bottom box. The quick-release assembly allows the docking frame and the installation frame to be quickly docked or separated. An interlocking closure component is provided below the right-angled folding plate, which forcibly closes the opening of the docking frame when the quick-release component allows the docking frame to separate from the mounting frame.

[0006] Optionally, the ultrasonic piezoelectric catalytic assembly includes an ultrasonic generating terminal, a piezoelectric catalytic layer, a flow guide plate, and a common bolt. The ultrasonic generating terminal is fixedly connected to the top of the mounting frame, and docking nuts are symmetrically fixedly connected to the bottom of the inner cavity of the mounting frame. A first filter screen and a piezoelectric catalytic layer are sequentially sleeved on the outer wall of the common bolt.

[0007] Optionally, the tail of the common bolt is screwed into the mating nut, a positioning groove is provided on the side of the piezoelectric catalyst layer, multiple sets of guide plates are inserted into the positioning groove, a guide groove is provided on the side of the guide plate, a positioning sleeve is fitted on one side of the common bolt and a second filter screen is fitted on one side of the positioning sleeve.

[0008] Optionally, the quick-release assembly includes a drive plate, a horizontal column, and a docking block. The docking block is vertically inserted into the top of the bottom container. The inner cavity of the mounting frame has an insertion slot at a corresponding position. The horizontal column is fixedly connected to the bottom side of the docking block.

[0009] Optionally, the drive plate has a folded groove on its side, and the horizontal column extends into the folded groove, the diameter of the horizontal column being the same as the width of the folded groove.

[0010] Compared with the prior art, the present invention has the following advantages: 1. This device integrates ultrasonic generator terminals, a piezoelectric catalytic layer, a flow guide plate, and multi-stage filters within a replaceable mounting frame. Ultrasonic vibration excites the piezoelectric catalytic layer to generate a large number of active oxygen species, achieving highly efficient oxidative degradation of pollutants in groundwater. The flow guide plate and its channels regulate water flow, increasing the residence time of water in the catalytic zone and enhancing the contact area with the catalytic material. The first and second filters prevent particulate matter from entering the catalytic layer, ensuring a stable reaction environment. The overall structure forms a multi-stage synergistic catalytic system, significantly improving the treatment efficiency of the reaction wall for recalcitrant pollutants such as EDCs.

[0011] 2. This device utilizes a quick-release assembly formed by a bottom chamber, docking block, horizontal column, and drive plate. This allows for rapid insertion and removal of the mounting frame within a limited space, eliminating the need to disassemble the reaction wall when replacing the catalyst assembly, significantly reducing maintenance difficulty. The folded groove and horizontal column, along with other structural elements, ensure a smooth and reliable assembly and disassembly process, preventing component jamming. The right-angled folding plate and bottom chamber accommodate the quick-release mechanism, ensuring a clear insertion and removal path and high docking accuracy. The overall modular design not only reduces on-site operation time but also facilitates adjustments or upgrades to the catalyst module based on pollution load, improving the long-term operational stability and maintainability of the system.

[0012] 3. This device consists of an interlocking sealing assembly formed by a sealing plate, a drive rod, a common plate, and an adjusting screw. After the quick-release assembly releases the fixing relationship between the mounting frame and the docking frame, and after the piezoelectric catalytic component inside the mounting frame is to be replaced, the interlocking sealing assembly forcibly closes the opening of the docking frame to prevent untreated wastewater from passing through the reaction wall and disrupting the continuity and effectiveness of the entire remediation system. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 This is a schematic diagram of the connection structure between the mounting frame and the docking frame.

[0015] Figure 3 for Figure 2 Another perspective structural diagram.

[0016] Figure 4 This is a schematic diagram of a half-section of the mounting frame.

[0017] Figure 5 for Figure 4 A schematic diagram of the structure after removing the ultrasonic pressure electrocatalytic component.

[0018] Figure 6 This is a structural diagram of the interlocking enclosure assembly and its connecting parts.

[0019] Figure 7 This is a schematic diagram of the interlocking and sealing assembly.

[0020] Figure 8 for Figure 7 A schematic diagram of the structure after removing the right-angled folding plate.

[0021] In the diagram: 1. Docking frame; 2. Receiving cavity; 3. Bottom cavity; 4. Reaction wall; 5. Inner cavity; 6. Mounting frame; 61. Insertion slot; 62. Ultrasonic generator terminal; 7. Bottom box; 8. Right-angle folded plate; 9. First filter screen; 10. Common bolt; 100. Positioning sleeve; 11. Guide plate; 110. Guide groove; 12. Piezoelectric catalyst layer; 121. Positioning groove; 13. Second filter screen; 14. Docking nut; 15. Docking block; 16. Sealing plate; 17. Drive plate; 171. Folded groove; 18. Horizontal column; 19. Limiting ring; 20. Adjusting screw; 21. Docking rod; 22. Rectangular guide post; 231. Horizontal movement groove; 23. Common plate; 24. Vertical column; 25. Drive rod; 26. Clearance groove. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] Reference Figures 1-8 The ultrasonic piezoelectric catalytic-permeable reactive wall groundwater remediation device includes a reactive wall 4. The preparation process of the reactive wall 4 is to mix PDMS matrix and piezoelectric nanomaterials at a mass ratio of 7:3, add curing agent and stir evenly, pour into a mold and cure at 60°C for 2 hours to make a porous PDMS piezoelectric composite sponge. Quartz sand filter layer and activated carbon adsorption layer are respectively pasted on both sides to form the reactive wall 4.

[0025] The reaction wall 4 has multiple internal cavities 5 evenly spaced on its side. A receiving cavity 2 is located on one side of each internal cavity 5. A docking frame 1 is glued to the receiving cavity 2. The internal cavity 5 accommodates an installation frame 6. Both the docking frame 1 and the installation frame 6 are made of corrosion-resistant plastic. (Reference) Figure 1 as well as Figure 2 It is easy to obtain that the cross-sectional dimension of the docking frame 1 is larger than that of the mounting frame 6. An ultrasonic piezoelectric catalytic component is installed inside the mounting frame 6, which generates a large number of active oxygen species.

[0026] The ultrasonic piezoelectric catalytic assembly includes an ultrasonic generating terminal 62, a piezoelectric catalytic layer 12, a flow guide plate 11, and a common bolt 10. The ultrasonic generating terminal 62 is fixedly connected to the top of the mounting frame 6 with screws. (See reference) Figure 2 as well as Figure 3 The connecting wire of the ultrasonic generating terminal 62 finally passes through the top side of the docking frame 1. Since there are multiple ultrasonic generating terminals 62, the multiple ultrasonic generating terminals 62 need to be connected in parallel to the same ultrasonic driving power supply in the prior art to ensure synchronous and stable output of ultrasonic excitation.

[0027] The bottom of the inner cavity of the mounting frame 6 is symmetrically and integrally injection molded with docking nuts 14. The outer wall of the common bolt 10 is sequentially fitted with a first filter screen 9 and a piezoelectric catalyst layer 12. The tail thread of the common bolt 10 is screwed into the docking nut 14. The piezoelectric catalyst layer 12 has a positioning groove 121 on its side. Multiple sets of guide plates 11 are inserted into the positioning groove 121. The guide plate 11 has a guide channel 110 on its side. The cross-sectional shape of the guide channel 110 is S-shaped, so that the groundwater stays in the guide plate 11 as much as possible.

[0028] A positioning sleeve 100 is fitted onto one side of the piezoelectric catalytic layer 12 on the common bolt 10, and a second filter screen 13 is fitted onto one side of the positioning sleeve 100 on the common bolt 10. The cross-sectional dimensions of the first filter screen 9 and the second filter screen 13 match the cross-sectional dimensions of the inner cavity of the mounting frame 6, intercepting large particles in the sewage entering the mounting frame 6. The positioning sleeve 100 ensures that when the piezoelectric catalytic layer 12 and the second filter screen 13 are installed on the outer wall of the common bolt 10, a gap is naturally formed between the piezoelectric catalytic layer 12 and the second filter screen 13, preventing them from being tightly fitted together. The natural gap formed by this structure helps the water flow to fully enter the outer side of the catalytic layer, improving fluid permeability and interface contact area, making it easier for active oxygen species to diffuse to the outside of the filter screen.

[0029] The piezoelectric catalyst layer 12 is prepared by solution casting of PVDF piezoelectric film. PVDF powder is dissolved in N,N-dimethylformamide (DMF) to prepare a 15% mass fraction solution. The solution is stirred at 60°C until completely dissolved. The solution is then uniformly coated on a polyester substrate and dried at 80°C for 4 hours to form a film.

[0030] The reaction wall 4 has a bottom cavity 3 at the bottom of the receiving cavity 2. The bottom of the inner cavity of the docking frame 1 is integrally injection molded with a right-angle folding plate 8. One end of the right-angle folding plate 8 is fixedly connected to the bottom container 7 with screws. The bottom container 7 is equipped with a quick-release assembly. The quick-release assembly allows the docking frame 1 and the mounting frame 6 to be quickly docked or separated. The quick-release assembly includes a drive plate 17, a horizontal column 18, and a docking block 15. The docking block 15 moves vertically into the top of the bottom container 7. Therefore, the docking block 15 can only move vertically. The inner cavity of the mounting frame 6 has an insertion slot 61 at the corresponding position. When the docking block 15 is inserted into the insertion slot 61, it will lock the mounting frame 6 and the docking frame 1 together.

[0031] A horizontal column 18 is fixedly connected to the bottom side of the docking block 15. A folded groove 171 is opened on the side of the drive plate 17. The horizontal column 18 extends into the folded groove 171. The diameter of the horizontal column 18 is the same as the width of the folded groove 171. (Reference) Figure 7 The folded groove 171 includes two horizontal sections and an inclined section connecting the two horizontal sections. The height of one horizontal section is greater than the height of the other horizontal section. When the horizontal column 18 moves from the higher horizontal section to the lower horizontal section, the mating block 15 will be pulled out from the insertion groove 61.

[0032] An interlocking sealing assembly is provided below the right-angle folding plate 8. When the quick-release assembly allows the docking frame 1 to separate from the mounting frame 6, it forcibly closes the opening of the docking frame 1. The interlocking sealing assembly includes a sealing plate 16, a drive rod 25, a common plate 23, and an adjusting screw 20. The sealing plates 16 are equidistantly connected to the docking frame 1 by pins. The rotation shaft of the sealing plate 16 is located below the sealing plate 16. When multiple sealing plates 16 are fully rotated to the parallel state of the docking frame 1, multiple sealing plates 16 will close the docking frame 1.

[0033] A drive rod 25 is fixedly welded to the bottom pivot end of the enclosed plate 16. A clearance groove 26 is provided on the drive rod 25. A vertical column 24 is movably inserted into the clearance groove 26. The vertical columns 24 are fixedly connected to the top of the common plate 23 at equal intervals. A transverse groove 231 is symmetrically provided on the common plate 23. A rectangular guide post 22 is movably inserted into the transverse groove 231. The rectangular guide post 22 is fixedly connected to the upper and lower surfaces of the common plate 23 with a limit plate 19. The rectangular guide post 22 is fixedly welded to the bottom of the right-angle folded plate 8. The rectangular guide post 22 and the transverse groove 231 are the same width, which restricts the common plate 23 to move only along the horizontal axis. When the common plate 23 moves laterally, it will push the drive rod 25 to rotate around the bottom pivot of the enclosed plate 16 through the vertical column 24, thereby driving multiple enclosed plates 16 to move synchronously.

[0034] The drive plate 17 is fixedly welded to the side of the common plate 23. A connecting rod 21 is fixedly welded to the side of the common plate 23. An adjusting screw 20 is screwed into the connecting rod 21. The two ends of the adjusting screw 20 are rotatably connected to the connecting frame 1. A dial is fixedly connected to the end of the adjusting screw 20. When the dial at one end of the adjusting screw 20 is rotated by an external force, the adjusting screw 20 will rotate, thereby driving the common plate 23 to move laterally. On the one hand, the common plate 23 will push the drive rod 25 to rotate around the bottom pivot of the closed plate 16 through the vertical column 24, thereby driving multiple closed plates 16 to move synchronously. On the other hand, it will drive multiple drive plates 17 to move laterally.

[0035] The specific implementation steps and principles of this invention are as follows: refer to Figure 5 as well as Figure 6 When the mounting frame 6 and the docking frame 1 are docked, the horizontal column 18 is at the extreme position of one end of the folded groove 171. At this time, multiple closed plates 16 are in the open state, and the docking block 15 is inserted into the insertion groove 61. When sewage containing new pollutants enters the mounting frame 6 through the inlet, the water flows in an "S" shaped path under the guidance of the guide plate 11, which prolongs the residence time of the sewage in the mounting frame 6. The ultrasonic generating terminal 62 generates ultrasonic waves. The ultrasonic waves act on the sewage and the piezoelectric catalyst layer in the reaction chamber. The piezoelectric catalyst layer 12 generates a piezoelectric potential under the action of ultrasonic waves, which promotes the separation of electron-hole pairs on the surface of the catalyst layer and generates a large number of active oxygen species. These active oxygen species have strong oxidizing properties and can oxidize and decompose new pollutants.

[0036] When maintenance or replacement of the ultrasonic piezoelectric catalytic component in the mounting frame 6 is required, the adjusting screw 20 is manually rotated. The adjusting screw 20 drives the common plate 23 to move laterally to its limit position. The common plate 23 drives the drive plate 17 to move laterally. At this time, the horizontal column 18 moves from one end of the folded groove 171 to the other limit position, driving the docking block 15 to be pulled out from the insertion groove 61. At the same time, the common plate 23 drives multiple sealing plates 16 to rotate through the vertical column 24 and the drive rod 25. The docking frame 1 is closed, and finally the docking frame 1 is separated from the mounting frame 6.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An ultrasonic piezocatalytic-permeable reactive wall groundwater remediation device comprising a reactive wall body (4), characterized in that, The reaction wall (4) is provided with a plurality of content cavities (5) equidistantly on the side, the reaction wall (4) is provided with a containing cavity (2) on one side of the content cavity (5), the containing cavity (2) is fixedly connected with a docking frame (1), the content cavity (5) contains a mounting frame (6), the mounting frame (6) is provided with an ultrasonic piezoelectric catalytic assembly, a large amount of active oxygen species is generated in the mounting frame (6); the reaction wall (4) is provided with a bottom containing cavity (3) at the bottom of the containing cavity (2), the bottom of the inner cavity of the docking frame (1) is fixedly connected with a right-angle folding plate (8), one end of the right-angle folding plate (8) is fixedly connected with a bottom containing box (7), the bottom containing box (7) is provided with a quick release assembly, the quick release assembly allows the docking frame (1) and the mounting frame (6) to be quickly docked or separated; the interlocking sealing assembly is arranged below the right-angle folding plate (8), when the quick release assembly allows the docking frame (1) and the mounting frame (6) to be separated, the opening of the docking frame (1) is forcedly sealed.

2. The ultrasonic piezocatalytic-permeable reactive barrier groundwater remediation apparatus of claim 1, wherein, The ultrasonic piezoelectric catalytic assembly comprises an ultrasonic generating terminal (62), a piezoelectric catalytic layer (12), a flow guide plate (11) and a common bolt (10), the top of the mounting frame (6) is fixedly connected with the ultrasonic generating terminal (62), the bottom of the inner cavity of the mounting frame (6) is fixedly connected with a docking nut (14) symmetrically, and the outer wall of the common bolt (10) is sequentially sleeved with a first filter screen (9) and the piezoelectric catalytic layer (12).

3. The ultrasonic piezocatalytic-permeable reactive barrier groundwater remediation apparatus of claim 2, wherein, The tail of the common bolt (10) is screwed into the docking nut (14), the piezoelectric catalytic layer (12) is provided with a positioning groove (121) on the side, a plurality of groups of flow guide plates (11) are inserted into the positioning groove (121), the flow guide plate (11) is provided with a flow guide groove (110) on the side, the common bolt (10) is sleeved with a positioning sleeve (100) on one side of the piezoelectric catalytic layer (12), and the common bolt (10) is sleeved with a second filter screen (13) on one side of the positioning sleeve (100).

4. The ultrasonic piezocatalytic-permeable reactive barrier groundwater remediation apparatus of claim 1, wherein, The quick release assembly comprises a driving plate (17), a horizontal column (18) and a docking block (15), the docking block (15) is movably inserted into the top of the bottom containing box (7) in the vertical direction, the inner cavity of the mounting frame (6) is provided with an insertion groove (61) at the corresponding position, and the bottom of the side of the docking block (15) is fixedly connected with the horizontal column (18).

5. The ultrasonic piezocatalytic-permeable reactive barrier groundwater remediation apparatus of claim 4, wherein, The side of the driving plate (17) is provided with a folding groove (171), the horizontal column (18) extends into the folding groove (171), and the diameter of the horizontal column (18) is the same as the width of the folding groove (171).

6. The ultrasonic piezocatalytic-permeable reactive barrier groundwater remediation apparatus of claim 4, wherein, The interlocking sealing assembly comprises a sealing plate (16), a driving rod (25), a common plate (23) and an adjusting screw rod (20), the sealing plate (16) is rotatably connected to the docking frame (1) equidistantly, and the bottom of the sealing plate (16) is fixedly connected with the driving rod (25) at the end of the rotating shaft.

7. The ultrasonic piezocatalytic-permeable reactive barrier groundwater remediation apparatus of claim 6, wherein, The horizontal moving groove (231) is symmetrically arranged on the common plate (23), a rectangular guide column (22) is movably inserted into the horizontal moving groove (231), the rectangular guide column (22) is fixedly connected with a limiting disc (19) on the upper and lower surfaces of the common plate (23), and the rectangular guide column (22) is fixedly connected to the bottom of the right-angle folding plate (8).

8. The ultrasonic piezocatalytic-permeable reactive barrier groundwater remediation apparatus of claim 6, wherein, The driving plate (17) is fixedly connected to the side surface of the common plate (23), the side surface of the common plate (23) is fixedly connected with a butt joint rod (21), and the butt joint rod (21) is screwed with an adjusting screw rod (20).

9. The ultrasonic piezocatalytic-permeable reactive barrier groundwater remediation apparatus of claim 8, wherein, The two ends of the adjusting screw rod (20) are rotatably connected to the butt joint frame (1), and the tail end of the adjusting screw rod (20) is fixedly connected with a handle.

10. The ultrasonic piezocatalytic-permeable reactive barrier groundwater remediation apparatus of claim 6, wherein, The driving rod (25) is provided with an avoiding groove (26), a vertical column (24) is movably inserted into the avoiding groove (26), and the vertical column (24) is fixedly connected to the top of the common plate (23) at equal intervals.

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