Modularized micro-polluted water body in-situ remediation device based on gas-liquid pulse strengthening

Abstract

The invention discloses a modular micro-polluted water body in-situ remediation device based on gas-liquid pulse intensification, which comprises a floating body platform for providing main buoyancy, a pulse generation system is arranged in the floating body platform, the pulse generation system mixes gas and liquid and then sprays out the gas and the liquid, a photovoltaic module is fixedly arranged at the top of the floating body platform, and the photovoltaic module is connected with the floating body platform. A composite reaction unit is detachably arranged at the bottom of the floating body platform and is used for oxidizing and decontaminating a water body. According to the modularized micro-polluted water body in-situ remediation device based on gas-liquid pulse strengthening, the floating body platform adopts the modularized design of 1m * 1m * 1m, the scale can be freely combined according to the actual water body remediation requirement, and the applicability of the device in different water body environments is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of water remediation technology, specifically to a modular in-situ remediation device for micro-polluted water bodies based on gas-liquid pulse enhancement. Background Technology

[0002] With the rapid development of industrialization, urbanization, and agricultural modernization, large amounts of untreated industrial wastewater, domestic sewage, urban surface runoff, and agricultural non-point source pollution are discharged into water bodies, leading to increasingly severe water pollution problems worldwide. Micropolluted water bodies, as a special form of pollution, are gradually becoming a global focus. Micropolluted water bodies refer to water bodies where one or more indicators, such as chemical oxygen demand (COD), total phosphorus, ammonia nitrogen, turbidity, and toxic substances, exceed the standard values ​​stipulated in the "Surface Water Environmental Quality Standard" applicable to rivers and lakes. This type of pollution is not as severe and obvious as direct industrial wastewater discharge, but rather affects aquatic ecosystems and human lives in a relatively insidious and gradual manner. Although the concentration of pollutants is low, the types are diverse, encompassing organic pollutants, heavy metals, nutrients, and emerging pollutants, posing a serious threat to the ecological environment, human health, and sustainable socio-economic development.

[0003] When carrying out aquatic ecological restoration of slightly polluted water bodies, traditional fixed biofilm carriers can degrade pollutants to a large extent, but there are technical problems such as easy clogging of the carrier and the need for frequent backwashing; while common microporous aeration devices have disadvantages such as rapid bubble rise, short gas-liquid contact time and low dissolved oxygen efficiency.

[0004] To address the shortcomings of existing technologies, this invention provides a modular in-situ remediation device for micro-polluted water bodies based on gas-liquid pulse enhancement, which can solve the above-mentioned technical problems. This micro-polluted water body remediation device, through gas-liquid pulse disturbance, bio-photoelectric synergy and intelligent response, is particularly suitable for the daily maintenance of high-flow-rate, highly polluted water bodies and low-polluted water bodies. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a modular in-situ remediation device for micro-polluted water bodies based on gas-liquid pulse enhancement, aiming to solve the aforementioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A modular in-situ remediation device for micro-polluted water bodies based on gas-liquid pulse enhancement includes:

[0008] A floating platform that provides the main buoyancy has a built-in pulse generation system that mixes gas and liquid and then sprays it out. A photovoltaic module is fixedly installed on the top of the floating platform, and a composite reaction unit is detachably installed on the bottom of the floating platform to oxidize and decontaminate the water.

[0009] Preferably, each of the floating platforms has a size of 1m×1m×1m and is a modular design, allowing different floating platforms to be spliced ​​together. The floating platform also includes a pontoon, with a floating plate fixed to the top of the pontoon. The floating plate is made of high-density polyethylene (HDPE) material.

[0010] Preferably, the floating plate is provided with buckles and slots on all four sides. The buckles are T-shaped and the buckles and slots are compatible. Different floating platforms can be connected by buckles and slots. The buckles are made of aluminum alloy and are integrally formed with the floating plate.

[0011] Preferably, the pulse generating system further includes a control system installed inside the float box. A high-pressure gas tank is installed on one side of the float box near the control system. The high-pressure gas tank is fixedly installed inside the float box by a first annular steel frame. A Venturi tube is located inside the float box on the other side of the high-pressure gas tank. The Venturi tube is fixedly installed inside the float box by a second annular steel frame. A drain pipe is fixedly connected to the throat of the Venturi tube. The end of the drain pipe away from the Venturi tube extends to the outside of the float box and is provided with a guide pipe. A metal hose is connected to the outlet end of the high-pressure gas tank and the inlet end of the Venturi tube. A pressure reducing and stabilizing valve and a piezoelectric ceramic valve are installed on the metal hose. The outlet end of the Venturi tube is welded and connected to... It has a gas-liquid mixing chamber, which is wrapped with a heat insulation layer on the outside. A shearing disk is placed inside the gas-liquid mixing chamber. A pulse jet nozzle with a built-in solenoid valve is fixed at the outlet end of the gas-liquid mixing chamber. The pulse jet nozzle extends to the outside of the float box and penetrates the bottom of the composite reaction unit. A feedback sensor connected to the control system signal is installed on the outside of the float box. High-pressure gas is introduced into the Venturi tube through a metal hose. A local low-pressure zone is formed at the throat of the Venturi tube. Liquid is drawn into the Venturi tube through the drainage pipe. The Venturi tube discharges the gas-liquid mixture into the gas-liquid mixing chamber. After being dispersed by the shearing disk, the gas-liquid mixture is sprayed out through the pulse jet nozzle.

[0012] The pressure reducing and stabilizing valve and the piezoelectric ceramic valve are signal-connected to the solenoid valve;

[0013] The guide tube has a built-in solenoid valve, and a filter screen is provided on the side of the guide tube away from the drain tube;

[0014] The bottom of the high-pressure gas tank is equipped with an anti-slip rubber pad, which is fixed inside the float box and wraps around the bottom of the high-pressure gas tank while maintaining a contact state and a tight fit with the anti-slip rubber pad.

[0015] Preferably, the shearing disc further includes a bracket fixed in the gas-liquid mixing chamber near the Venturi tube. A driver is fixed on the side of the bracket near the Venturi tube, and a turntable is rotatably connected to the side of the bracket away from the Venturi tube. The turntable is driven by the driver. Several blades are evenly arranged on the outer end of the turntable. The blades are tilted at an angle of 45° with respect to the turntable. Activating the driver can drive the turntable to rotate the blades at a speed of 3000 rpm, thereby cutting the gas-liquid mixture and increasing the contact area between the gas and the liquid.

[0016] Preferably, the composite reaction unit further includes a frame that can be detachably installed at the bottom of the float box. The bottom of the frame is a grid through which water flows. A honeycomb-shaped PE carrier plate is laid inside the frame. The diameter of the holes in the honeycomb-shaped PE carrier plate is smaller than the diameter of the grid. A biofilm carrier is laid on the side of the honeycomb-shaped PE carrier plate near the float box. The biofilm carrier is fixed by the honeycomb-shaped PE carrier plate. A catalytic component that can decontaminate the water is arranged around the outside of the frame. Through the contact of water flow with the biofilm carrier, the biofilm carrier provides a substrate for microorganisms to attach and form a biofilm.

[0017] The biofilm carrier is an activated carbon fiber composite ball with a diameter of 50 mm, smaller than the pore size of the honeycomb PE carrier plate, and a specific surface area of ​​2100 m². 2 / m 3 .

[0018] Preferably, the bottom of the frame is connected to an anchoring device that provides resistance to tensile forces for the floating platform. An installation plate is fixed on the grid, and the installation plate has mooring points corresponding to the anchoring device. The anchoring device also includes an anchor chain and a gravity anchor. One end of the gravity anchor has a mooring point, one end of the anchor chain is connected to the mooring point of the gravity anchor, and the other end is connected to the mooring point of the installation plate. The gravity anchor is a concrete block or a cast iron block, and its self-weight is configured to resist the displacement tensile force of the floating platform.

[0019] Preferably, the catalytic component further includes a transparent sleeve fixed around the perimeter of the frame. An LED light strip is fixed around the inner wall of the transparent sleeve near the floating box. The transparent sleeve is filled with a flexible photocatalyst, which wraps around the LED light strip. The LED strip has LEDs spaced 30cm apart. The LED strip provides energy of 5000-8000 lux to activate the photocatalyst and oxidize organic pollutants.

[0020] Preferably, the pulse jet nozzle is a stainless steel nozzle, which is set at a 45° angle to the bottom of the float box and passes through the mesh of the grid. The distance between the opening of the pulse jet nozzle and the bottom of the composite reaction unit is 20cm. The pulse jet nozzle forms an impact flow field at the bottom of the composite reaction unit through the ejected gas-liquid mixture.

[0021] Preferably, the photovoltaic module further includes a waterproof double-glass solar panel located on top of the floating plate, the waterproof double-glass solar panel being fixed to the upper end of the floating plate by a support frame, and a battery pack installed inside the floating box on the side away from the pulse generation system, the charging end of the battery pack being electrically connected to the waterproof double-glass solar panel, and the discharging end of the battery pack being electrically connected to the LED light strip, the control system, the pressure reducing and stabilizing valve, and the piezoelectric ceramic valve.

[0022] Each of the solenoid valves is electrically connected to the control system.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The modular in-situ remediation device for micro-polluted water bodies based on gas-liquid pulse enhancement provided by this invention adopts a 1m×1m×1m modular design for the floating platform, which can be freely combined in scale according to actual water body remediation needs, significantly improving the applicability of the device in different water body environments (such as rivers, lakes, and reservoirs).

[0025] The pulse generation system creates an impact flow field at the bottom of the composite reaction unit through pulse jet nozzles. The pulse jets from the nozzles can disturb the pollutants deposited in the water, further promoting the contact between pollutants and biofilm carriers, thereby accelerating the removal of pollutants. At the same time, in conjunction with the catalytic components, after activation by photocatalysts, electron-hole pairs are generated on the surface of the components, which efficiently oxidize organic pollutants and generate harmless substances, thus improving the decontamination effect. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the floating platform structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the pulse generation system of the present invention;

[0029] Figure 4 This is a schematic cross-sectional view of the gas-liquid mixing chamber of the present invention;

[0030] Figure 5 This is a schematic diagram of the overall structure of the venturi tube of the present invention.

[0031] In the diagram: 10. Floating platform; 11. Floating box; 12. Floating plate; 111. Buckle; 112. Slot; 20. High-pressure gas tank; 21. Venturi tube; 22. Metal hose; 23. Pressure reducing and stabilizing valve; 24. Piezoelectric ceramic valve; 25. Gas-liquid mixing chamber; 26. Shearing disc; 27. Pulse jet nozzle; 201. First annular steel frame; 202. Anti-slip rubber pad; 211. Second annular steel frame; 212. Drainage pipe; 213. Guide pipe; 30. Composite reaction unit; 31. Frame; 32. Grid; 40. Photovoltaic module; 41. Waterproof double-glass solar panel; 42. Battery pack; 50. Anchoring device; 51. Anchor chain; 52. Gravity anchor. Detailed Implementation

[0032] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1-3 The embodiments proposed in this application are as follows: a modular micro-polluted water body in-situ remediation device based on gas-liquid pulse enhancement, including a floating platform 10 with a built-in pulse generation system, a photovoltaic module 40 fixedly installed on the top of the floating platform 10, and a composite reaction unit 30 detachably installed at the bottom of the floating platform 10. The floating platform 10 provides the main buoyancy for the in-situ remediation device, and the gas and liquid are mixed and sprayed out through the pulse generation system. The composite reaction unit 30 oxidizes and decontaminates the water body.

[0034] The floating platform 10 features a modular design, with each unit measuring 1m × 1m × 1m, facilitating on-site assembly and splicing. Several different floating platforms 10 can be combined into a single unit as needed. This design offers excellent flexibility and adaptability to various scenarios. Furthermore, splicing multiple floating platforms 10 further enhances the overall stability of the assembled system. The floating platform 10 includes a pontoon 11 and a floating plate 12. The floating plate 12 is fixed to the top of the pontoon 11, and each of its four sides is equipped with a buckle 111 and a slot 1. 12. The buckle 111 is T-shaped, and the slot 112 is adapted to the buckle 111 so that different floating platforms 10 can be connected by their respective buckles 111 and slots 112 to splice and install different floating platforms 10, while ensuring the firm connection between different floating platforms 10 and evenly distributing the load. The buckle 111 and the floating plate 12 are integrally formed to ensure the connection strength between the buckle 111 and the floating plate 12. The buckle 111 is made of aluminum alloy, which has a corrosion-resistant effect and is more adaptable to the environment.

[0035] The floating plate 12 is made of high-density polyethylene (HDPE). The density of HDPE is typically between 0.94 and 0.96 g / cm³, which is lower than the density of water (1 g / cm³). 3 While low-density polyethylene (LDPE) has better buoyancy in water, high-density polyethylene (HDPE) has higher strength and impact resistance, making it more suitable for long-term outdoor use. HDPE also has better weather resistance, UV resistance, corrosion resistance, and a longer lifespan. In contrast, HDPE has relatively lower strength and is prone to aging, resulting in a shorter lifespan and requiring additional protection.

[0036] The pulse generation system includes a control system installed inside the float 11, which is waterproofed. The control system is an existing PLC system. A high-pressure gas tank 20 is fixedly installed inside the float 11 via a first annular steel frame 201. The high-pressure gas tank 20 is located near the control system. The first annular steel frame 201 is fixedly fitted onto the outer end of the high-pressure gas tank 20, and the frame end of the first annular steel frame 201 is fixed to the inner top wall of the float 11. An anti-slip rubber pad 202 is provided at the bottom of the high-pressure gas tank 20. The anti-slip rubber pad 202 is fixed inside the float 11 and wraps around the bottom of the high-pressure gas tank 20. The anti-slip rubber pad 202 maintains a resistive state while wrapping the high-pressure gas tank 20. To maintain a tight fit between the high-pressure gas tank 20 and the anti-slip rubber pad 202, making the high-pressure gas tank 20 more stable in the float box 11. On the other side of the high-pressure gas tank 20, there is a Venturi tube 21 located in the float box 11. The Venturi tube 21 is fixedly installed inside the float box 11 by a second annular steel frame 211. The second annular steel frame 211 is fixedly sleeved on the outside of the converging section of the Venturi tube 21, and the frame end of the second annular steel frame 211 is fixed to the inner top wall of the float box 11. (Alternatively, clamps can be used to fix the Venturi tube 21. Two corresponding U-shaped clamps are put together and sleeved on the outside of the converging section of the Venturi tube 21, and then connected to the support beam pre-embedded in the float box 11 by bolts through the U-shaped clamps.)

[0037] like Figure 3-5As shown, a metal hose 22 (a three-section pipe structure) connects the outlet of the high-pressure gas tank 20 and the inlet of the venturi tube 21. The first section connects the outlet of the high-pressure gas tank 20 to one side of the pressure reducing valve 23; the second section connects the other side of the pressure reducing valve 23 to one side of the piezoelectric ceramic valve 24; and the third section connects the other side of the piezoelectric ceramic valve 24 to the inlet of the venturi tube 21) is connected. The high-pressure gas in the high-pressure gas tank 20 is transported to the venturi tube 21 through the metal hose 22. The throat of the inner tube 21 is fixedly connected to a drain pipe 212. The end of the drain pipe 212 away from the venturi tube 21 extends to the outside of the float box 11 and is equipped with a guide pipe 213. The connection between the guide pipe 213 and the float box 11 is closed. The guide pipe 213 has a built-in solenoid valve, and a filter screen is provided on the side of the guide pipe 213 away from the drain pipe 212 to filter impurities in the water and prevent impurities from flowing into the venturi tube 21. When the solenoid valve is opened, the high-pressure gas tank 20 introduces high-pressure gas into the venturi tube 21 through the metal hose 22. Inside, the flow passes through the throat of the Venturi tube 21, where the flow velocity increases. According to Bernoulli's equation (an increase in kinetic energy leads to a decrease in static pressure), a local low-pressure zone forms at the throat of the Venturi tube 21. The pressure difference forces liquid from the external water body into the guide pipe 213. The liquid is drawn into the Venturi tube 21 from the drain pipe 212. The liquid drawn into the Venturi tube 21 is entrained in the high-speed airflow, forming a gas-liquid mixture, which is then discharged from the outlet end of the Venturi tube 21 with the airflow. The metal hose 22 is connected to the high-pressure gas tank 20 and the Venturi tube 21 by a flange connection. The flange uses a graphite sealing ring to prevent leakage. The metal hose 22 is equipped with a pressure reducing and stabilizing valve 23 and a piezoelectric ceramic valve 24. The pressure reducing and stabilizing valve 23 can ensure that the gas pressure is within the specified range. No matter how the external conditions change, the pressure in the gas tank is maintained at a safe value. The piezoelectric ceramic valve 24 can control the pressure change of the fluid, adjust the flow rate, thereby stabilizing the system pressure and achieving precise pressure adjustment, ensuring the normal operation of the system and the safety of the equipment. At the same time, the piezoelectric ceramic valve 24 can also be used as a switch valve to control whether the fluid can be delivered.

[0038] The outlet end of the Venturi tube 21 is welded and connected to a gas-liquid mixing chamber 25. The gas-liquid mixture discharged from the Venturi tube 21 enters the gas-liquid mixing chamber 25. The outside of the gas-liquid mixing chamber 25 is wrapped with a heat insulation layer to prevent condensation on the outside of the gas-liquid mixing chamber 25 from affecting the structure of the float box 11. The gas-liquid mixing chamber 25 has a shear plate 26 inside, which disperses the liquid into tiny droplets to increase the contact area between the gas and the liquid. The outlet end of the gas-liquid mixing chamber 25 is fixed with a pulse jet nozzle 27, which extends to the outside of the float box 11 and penetrates the bottom of the composite reaction unit 30. The connection between the pulse jet nozzle 27 and the float box 11 is closed. The pulse jet nozzle 27 has a built-in solenoid valve. When gas-liquid injection is required, the corresponding solenoid valve in the pulse jet nozzle 27 opens, and otherwise closes. The mixed gas-liquid mixture is ejected at high speed through the pulse jet nozzle 27 to generate a high-energy pulse to perform gas-liquid pulse on the water body.

[0039] The float 11 is equipped with a feedback sensor on its exterior. The feedback sensor is connected to the control system signal and transmits water quality data to the control system through the feedback sensor. The feedback sensor adopts an existing multi-parameter integrated water quality sensor (such as the YSIEXO series), which can simultaneously monitor multiple indicators such as COD, ammonia nitrogen, total phosphorus, turbidity, pH, and dissolved oxygen (DO). The feedback sensor monitors water quality changes online, and the control system adjusts the fluid pressure (the pressure intensity generated by the impact of high-pressure gas) according to the water quality changes to achieve the effect of automatically adjusting the pulse intensity.

[0040] Specifically, such as Figure 4 As shown, the shearing disk 26 includes a bracket 261 fixed inside the gas-liquid mixing chamber 25 near the Venturi tube 21. The bracket 261 is a support disk, which is fixed to the inner wall of the gas-liquid mixing chamber 25 by several rods. There is space between the rods for the gas-liquid mixture to pass through. An actuator is fixed on the side of the bracket 261 near the Venturi tube 21. The actuator is protected by a waterproof structure. The actuator is a device such as a drive motor. A turntable is rotatably connected to the side of the bracket 261 away from the Venturi tube 21. The turntable is connected to the output shaft of the actuator. The specific connection method can use existing technology, and the connection is waterproof. Several blades 262 are evenly provided on the outer end of the turntable. The blades 262 are tilted at an angle of 45° with respect to the turntable. Starting the actuator can drive the turntable to drive the blades 262 to rotate at a speed of 3000 rpm, cutting the gas-liquid mixture. The blades 262 disperse the liquid into tiny droplets (micro-nano bubbles), thereby increasing the contact area between the gas and the liquid, improving the mixing efficiency, and ensuring the uniformity of the gas-liquid mixture.

[0041] The aforementioned solenoid valves are all electrically connected to the control system. The pressure reducing and stabilizing valve 23 and the piezoelectric ceramic valve 24 are signal connected to the solenoid valves and are controlled by the control system to control their corresponding switching states. The pressure reducing and stabilizing valve 23 and the piezoelectric ceramic valve 24 are coordinated and regulated by the control system. For example, when the control system controls the piezoelectric ceramic valve 24 to increase the flow rate, it simultaneously dynamically adjusts the pressure reducing and stabilizing valve 23 to stabilize the pressure.

[0042] The photovoltaic module 40 includes a waterproof double-glass solar panel 41 located on top of the floating plate 12. The waterproof double-glass solar panel 41 is fixed to the upper end of the floating plate 12 by a support frame. It also includes a battery pack 42 installed inside the floating box 11 on the side away from the pulse generation system. The charging terminal of the battery pack 42 is electrically connected to the waterproof double-glass solar panel 41. The battery pack 42 requires waterproof protection, and the waterproof double-glass solar panel 41 is not directly connected to the battery pack 42. A charge / discharge controller is installed in the connection line to regulate current and voltage, prevent overcharging and over-discharging that could damage the battery pack 42, and improve charging efficiency. The discharging terminal of the battery pack 42 is connected to the control system. The pressure reducing and regulating valve 23 and the piezoelectric ceramic valve 24 are electrically connected. The connection line between the battery pack 42 and the control system is equipped with a voltage stabilizing module, protection circuit and isolation device to avoid damage to the PLC or cause safety hazards. The connection line between the pressure reducing and regulating valve 23 and the battery pack 42 is equipped with a voltage stabilizing module to prevent voltage drop, which could cause abnormal operation of the pressure reducing and regulating valve 23. The connection line between the piezoelectric ceramic valve 24 and the battery pack 42 is equipped with a boost module box and a piezoelectric drive circuit. The voltage is boosted to high voltage by the boost module and then driven by high voltage pulse to ensure the operation of the piezoelectric ceramic valve 24 (the piezoelectric drive circuit needs to be isolated from the PLC control system signal, such as by optocoupler isolation, to ensure control safety).

[0043] like Figure 1-2 As shown, the composite reaction unit 30 includes a frame 31 installed at the bottom of the float 11. The frame 31 can be installed and connected to the float 11 with bolts for easy assembly and disassembly. The bottom of the frame 31 is a grid 32 with a pore size of 15cm, through which water flows. A honeycomb-shaped PE carrier plate is laid inside the frame 31. The pore diameter of the honeycomb-shaped PE carrier plate is smaller than that of the grid 32. A biofilm carrier is laid on the side of the honeycomb-shaped PE carrier plate near the float 11, and the biofilm carrier is fixed by the honeycomb-shaped PE carrier plate. The biofilm carrier is an activated carbon fiber composite ball with a diameter of 50mm, which is smaller than the pore size of the honeycomb-shaped PE carrier plate, and has a specific surface area of ​​2100m². 2 / m 3The water at the bottom of the frame 31 can also come into contact with the biofilm carrier through the honeycomb PE carrier plate. The biofilm carrier can provide a substrate for microorganisms to attach to, forming a stable biofilm, and ultimately removing pollutants. The outer side of the frame 31 is surrounded by catalytic components to decontaminate the water and oxidize the organic pollutants in the water.

[0044] Specifically, the catalytic component includes a transparent casing fixed around the perimeter of the frame 31. An LED light strip is fixed around the inner wall of the transparent casing near the float box 11, and the transparent casing is filled with a flexible photocatalyst (TiO2). The flexible photocatalyst wraps around the LED light strip. The LED strips are spaced 30cm apart and sealed with waterproof glue. The LED light strip is electrically connected to the battery pack 42. The connection line between the LED light strip and the battery pack 42 is designed with a magnetic ring to prevent interference. The LED light strip can provide energy of 5000-8000 lux to activate the photocatalyst, causing electron-hole pairs to be generated on its surface, which efficiently oxidizes organic pollutants and generates harmless substances.

[0045] Furthermore, the pulse jet nozzle 27 is made of stainless steel and is set at a 45° angle to the bottom of the float box 11. It passes through the mesh of the grid 32 at the bottom of the frame 31. The distance between the opening of the pulse jet nozzle 27 and the bottom of the composite reaction unit 30 is 20cm. The gas-liquid mixture is ejected through the pulse jet nozzle 27 to form an impact flow field in the water at the bottom of the composite reaction unit 30.

[0046] Furthermore, threaded holes are provided on the buckle 111 and the slot 112 respectively. When different floating platforms 10 are spliced ​​together, bolts are installed on the buckle 111 and the slot 112 through the threaded holes to further improve the stability of the different floating platforms 10 after installation and splicing.

[0047] In further embodiments, please refer to Figure 1-2The bottom of the composite reaction unit 30 is equipped with an anchoring device 50. Since the floating platform 10 generates horizontal tension when pushed by water flow, wind, and waves, the weight of the anchoring device 50 provides resistance to this tension. The bottom of the frame 31 is connected to the anchoring device 50. A mounting plate is fixed to the grid 32 of the frame 31, and the mounting plate has mooring points corresponding to the anchoring device 50. The anchoring device 50 includes an anchor chain 51 and a gravity anchor 52, with a mooring point at one end of the gravity anchor 52. One end of the anchor chain 51 is connected to the mooring point of the gravity anchor 52, and the other end is connected to the mooring point of the mounting plate. The gravity anchor 52 is a concrete block or a cast iron block, and its own weight is configured to resist the displacement tension of the floating platform 10 and resist the external loads (such as wind, waves, water flow, etc.) on the floating platform 10, thereby maintaining the overall stability of the device. At the same time, the gravity anchor 52 can also further offset the tension brought by the external load through the friction between its own weight and the water, preventing the device from drifting.

[0048] The aforementioned high-pressure gas tank 20 is also equipped with an air inlet pipe to facilitate the filling of gas into the interior of the high-pressure gas tank 20. The air inlet pipe is equipped with a valve to control the intake and exhaust. When gas needs to be filled into the high-pressure gas tank 20, the valve is opened; otherwise, the valve remains closed.

[0049] The workflow of this modular in-situ remediation device for micro-polluted water bodies based on gas-liquid pulse enhancement is specifically divided into three stages:

[0050] Step 1: Pulse Drive Stage

[0051] (The piezoelectric ceramic valve 24 opens the high-pressure gas tank 20 to release gas → the venturi tube 21 draws in water through the guide tube 213 → the shear plate 26 disperses the gas-liquid mixture to form micro-nano bubbles → the pulse nozzle sprays the gas-liquid mixture to disturb the sediment at the bottom of the water body.)

[0052] Step Two: Reaction Enhancement Stage

[0053] (The gas-liquid mixture ejected by the pulse nozzle forms an impact flow field that agitates the water, allowing pollutants in the water to come into contact with the biofilm carrier → LED lights activate the flexible photocatalyst → solar power sustains continuous operation day and night.)

[0054] Step 3: Intelligent Control Closed Loop

[0055] Feedback sensor monitors dissolved oxygen → control system dynamically adjusts valve body (pressure reducing and stabilizing valve 23 and piezoelectric ceramic valve 24 opening) → maintains optimal reaction conditions.

[0056] Table 1 shows the experimental data, illustrating the differences in treatment effects on slightly polluted water bodies under different parameter combinations. This data is based on an experimental scenario with typical pollutant concentrations (COD: 120-150 mg / L, ammonia nitrogen: 8-12 mg / L, total phosphorus: 1.5-2.5 mg / L).

[0057]

[0058] Treatment results and conclusions:

[0059] Pulse frequency (experimental groups 1-3): High-frequency pulse (30Hz) significantly improves pollutant removal rate, but energy consumption increases simultaneously, requiring a trade-off between efficiency and cost.

[0060] Gas flow rate (Experimental groups 4-5: Increasing the gas flow rate can enhance the gas-liquid mass transfer effect, but the increase in removal rate slows down after the flow rate exceeds 20 L / min.

[0061] Liquid pressure (experimental group 6-7: 0.4MPa) allows for a more complete reaction, but the pressure resistance safety of the equipment and energy consumption must be considered.

[0062] Processing time (Experimental group 8-9: extended to 3 hours to achieve deep purification, suitable for high pollution scenarios).

[0063] Number of modules (experimental group 10-11: parallel connection of multiple modules significantly improves processing capacity, but energy consumption needs to be considered;

[0064] High-efficiency mode (experimental group 10: 5 modules + 20Hz + 0.3MPa, suitable for high-flow, highly polluted water bodies);

[0065] Energy-saving mode (Experimental group 1: 10Hz + low energy consumption combination, suitable for low-pollution daily maintenance);

[0066] Balanced mode experimental group 2 / 5: 20Hz + 15-20L / min parameters, balancing efficiency and economy.

[0067] Based on the treatment results, in actual use, the high-efficiency mode (suitable for large flow and highly polluted water bodies), the energy-saving mode (suitable for low-pollution daily maintenance), and the balanced mode (balancing efficiency and economy as the main usage mode) can be adopted according to the specific situation.

[0068] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular in-situ remediation device for micro-polluted water bodies based on gas-liquid pulse enhancement, characterized in that, include: A floating platform (10) provides the main buoyancy. The floating platform (10) has a built-in pulse generation system. The pulse generation system sprays out the gas-liquid mixture. A photovoltaic module (40) is fixedly installed on the top of the floating platform (10). A composite reaction unit (30) is detachably installed on the bottom of the floating platform (10) to oxidize and decontaminate the water.

2. The modular in-situ remediation device for micro-polluted water bodies based on gas-liquid pulse enhancement according to claim 1, characterized in that, Each of the floating platforms (10) has a size of 1m×1m×1m and is a modular design. Different floating platforms (10) can be spliced ​​together. The floating platform (10) also includes a pontoon (11). The top of the pontoon (11) is fixed with a floating plate (12), which is made of high-density polyethylene (HDPE) material.

3. The modular in-situ remediation device for micro-polluted water bodies based on gas-liquid pulse enhancement according to claim 2, characterized in that, The four sides of the floating plate (12) are provided with buckles (111) and slots (112). The buckles (111) are T-shaped and the buckles (111) and slots (112) are compatible. Different floating platforms (10) can be connected by buckles (111) and slots (112). The buckles (111) are made of aluminum alloy and are integrally formed with the floating plate (12).

4. The modular in-situ remediation device for micro-polluted water bodies based on gas-liquid pulse enhancement according to claim 1, characterized in that, The pulse generation system also includes a control system installed inside the float box (11). A high-pressure gas tank (20) is installed on one side of the float box (11) near the control system. The high-pressure gas tank (20) is fixedly installed inside the float box (11) by a first annular steel frame (201). A Venturi tube (21) is located inside the float box (11) on the other side of the high-pressure gas tank (20). The Venturi tube (21) is fixedly installed inside the float box (11) by a second annular steel frame (211). A drain pipe (212) is fixedly connected to the throat of the Venturi tube (21). The end of the drain pipe (212) away from the Venturi tube (21) extends to the outside of the float box (11) and is provided with a guide pipe (213). A metal hose (22) is connected to the outlet end of the high-pressure gas tank (20) and the inlet end of the Venturi tube (21). A pressure reducing and stabilizing valve (23) and a piezoelectric ceramic valve (24) are installed on the metal hose (22). 1) The outlet end is welded and connected to a gas-liquid mixing chamber (25). The gas-liquid mixing chamber (25) is wrapped with a heat insulation layer. The gas-liquid mixing chamber (25) has a shear plate (26) inside. The outlet end of the gas-liquid mixing chamber (25) is fixed with a pulse jet nozzle (27) with a built-in solenoid valve. The pulse jet nozzle (27) extends to the outside of the float box (11) and penetrates the bottom of the composite reaction unit (30). The float box (11) is equipped with a feedback sensor connected to the control system signal. The high-pressure gas tank (20) inputs high-pressure gas into the venturi tube (21) through the metal hose (22). The throat of the venturi tube (21) will form a local low-pressure area. The liquid is drawn into the venturi tube (21) through the drainage pipe (212). The venturi tube (21) discharges the gas-liquid mixture into the gas-liquid mixing chamber (25). After being dispersed by the shear plate (26), the gas-liquid mixture is sprayed out through the pulse jet nozzle (27). The pressure reducing and regulating valve (23) and the piezoelectric ceramic valve (24) are connected to the solenoid valve via signal connection; The guide tube (213) is equipped with a solenoid valve, and a filter screen is provided on the side of the guide tube (213) away from the drain tube (212); The bottom of the high-pressure gas tank (20) is provided with an anti-slip rubber pad (202). The anti-slip rubber pad (202) is fixed inside the float box (11) and wraps the bottom of the high-pressure gas tank (20) while maintaining a contact state and a tight fit with the anti-slip rubber pad (202).

5. The modular in-situ remediation device for micro-polluted water bodies based on gas-liquid pulse enhancement according to claim 4, characterized in that, The shearing disc (26) also includes a bracket (261) fixed in the gas-liquid mixing chamber (25) near the Venturi tube (21). A driver is fixed on the side of the bracket (261) near the Venturi tube (21), and a turntable is rotatably connected on the side of the bracket (261) away from the Venturi tube (21). The turntable is driven by the driver. Several blades (262) are evenly provided on the outer end of the turntable. The blades (262) are tilted at an angle of 45° with respect to the turntable. When the driver is activated, the turntable can drive the blades (262) to rotate at a speed of 3000 rpm, thereby cutting the gas-liquid mixture and increasing the contact area between the gas and the liquid.

6. The modular in-situ remediation device for micro-polluted water bodies based on gas-liquid pulse enhancement according to claim 1, characterized in that, The composite reaction unit (30) also includes a frame (31) that can be detachably installed at the bottom of the float (11). The bottom of the frame (31) is a grid (32) through which water flows. A honeycomb PE carrier plate is laid inside the frame (31). The diameter of the holes in the honeycomb PE carrier plate is smaller than the diameter of the grid (32). A biofilm carrier is laid on the side of the honeycomb PE carrier plate that is close to the float (11). The biofilm carrier is fixed by the honeycomb PE carrier plate. A catalytic component that can decontaminate water is arranged around the outside of the frame (31). The biofilm carrier provides a substrate for microorganisms to attach to and form a biofilm. The biofilm carrier is an activated carbon fiber composite ball with a diameter of 50 mm, smaller than the pore size of the honeycomb PE carrier plate, and a specific surface area of ​​2100 m². 2 / m 3 .

7. The modular in-situ remediation device for micro-polluted water bodies based on gas-liquid pulse enhancement according to claim 6, characterized in that, The bottom of the frame (31) is connected to an anchoring device (50) that provides resistance to tension for the floating platform (10). An installation plate is fixed on the grid (32). The installation plate has mooring points corresponding to the anchoring device (50). The anchoring device (50) also includes an anchor chain (51) and a gravity anchor (52). One end of the gravity anchor (52) has a mooring point. One end of the anchor chain (51) is connected to the mooring point of the gravity anchor (52), and the other end is connected to the mooring point of the installation plate. The gravity anchor (52) is a concrete block or a cast iron block, and its self-weight is configured to resist the displacement tension of the floating platform (10).

8. The modular in-situ remediation device for micro-polluted water bodies based on gas-liquid pulse enhancement according to claim 7, characterized in that, The catalytic assembly also includes a transparent box that is fixed around the periphery of the frame (31). An LED light strip is fixed around the inner wall of the transparent box near the floating box (11). The transparent box is filled with a flexible photocatalyst that wraps around the LED light strip. The LED strip is set with LEDs spaced 30cm apart. The LED strip provides energy of 5000-8000 lux to activate the photocatalyst and oxidize organic pollutants.

9. The modular in-situ remediation device for micro-polluted water bodies based on gas-liquid pulse enhancement according to claim 7, characterized in that, The pulse jet nozzle (27) is made of stainless steel. The pulse jet nozzle (27) is set at a 45° angle to the bottom of the float box (11) and passes through the mesh of the grid (32). The distance between the opening of the pulse jet nozzle (27) and the bottom of the composite reaction unit (30) is 20cm. The pulse jet nozzle (27) forms an impact flow field at the bottom of the composite reaction unit (30) through the ejected gas-liquid mixture.

10. The modular in-situ remediation device for micro-polluted water bodies based on gas-liquid pulse enhancement according to any one of claims 1 or 4, characterized in that, The photovoltaic module (40) also includes a waterproof double-glass solar panel (41) located on top of the floating plate (12). The waterproof double-glass solar panel (41) is fixed to the upper end of the floating plate (12) by a support frame, and a battery pack (42) installed inside the floating box (11) on the side away from the pulse generation system. The charging end of the battery pack (42) is electrically connected to the waterproof double-glass solar panel (41), and the discharging end of the battery pack (42) is electrically connected to the LED light strip, the control system, the pressure reducing and stabilizing valve (23), and the piezoelectric ceramic valve (24). Each of the solenoid valves is electrically connected to the control system.

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