Three-dimensional irradiation water conveyance canal ecological management system and method based on deep ultraviolet LED

Abstract

The invention discloses a three-dimensional irradiation water conveyance canal ecological management system and method based on a deep ultraviolet LED, and belongs to the field of ecological management. The system comprises a shore-based irradiation subsystem, a suspended mobile irradiation subsystem, a photovoltaic power supply subsystem and an intelligent control subsystem; 275nm deep ultraviolet light is used for accurately destroying an algae light system II reaction center (the PsbA protein inactivation rate is greater than 95%), and 235nm auxiliary wavelength is combined for decomposing organic pollutants, so that algae inactivation and water purification are synchronously realized. The suspension unit adopts a ball screw lifting mechanism (the positioning precision is + / -2mm) to adapt to water level fluctuation, and the photovoltaic direct supply system reduces carbon emission by 63%. The system can reduce the algae biomass by 92% and the DOC removal rate by 41%, and has no toxic influence on fishes (LC50 is greater than 100mW / cm < 2 >). The pollution risk of a traditional mercury lamp and the ecological harm of a chemical method are overcome, and a green treatment scheme is provided for a long-distance water transfer project.

Description

Technical Field

[0001] The present invention belongs to the field of ecological management, and in particular relates to a deep ultraviolet LED-based three-dimensional irradiation water channel ecological management system and method. Background Art

[0002] Open channels are the primary method of water transfer in my country's vast irrigation areas and water diversion projects. After a period of operation, large amounts of algae often attach to the trash racks and lining surfaces of water intakes in canal systems, severely reducing the channel's water transfer capacity and efficiency. These lower algae, which grow on submerged surfaces, are called epiphytic algae and primarily include cyanobacteria, green algae, diatoms, and other algae. Factors such as epiphytic algae growth and carbonization of the concrete surface increase the roughness of the channel, resulting in greater energy loss along the channel, reducing its water transfer capacity. Furthermore, the algae's attachment and acidic substances can damage the channel lining, increasing seepage losses.

[0003] Common methods for removing algae from water bodies include physical, chemical, and biological methods. Physical methods involve manual mechanical scraping of algae. This method is energy-intensive, inefficient, and involves high relocation costs and damage to channel linings, making it of limited practical value for application in main water channels. Chemical methods involve adding chemicals such as copper sulfate, ozone, potassium permanganate, or flocculants to the water source to inhibit algae growth. This method requires very large amounts of these chemicals and causes secondary pollution to the canal water, increasing water treatment costs. Biological methods involve stocking grass-loving fish, microorganisms, or higher plants to regulate algae growth through food chain balance and allelopathic effects. However, most irrigation canal systems in my country are open, and the introduction of fish, microorganisms, and plants introduces new challenges to irrigation area management, making management and maintenance difficult and, therefore, ineffective. Traditional ultraviolet irradiation algaecide technology is unsuitable for use in drinking water sources because it typically uses mercury lamps containing highly toxic mercury vapor (3-50mg of mercury per lamp), resulting in a glass tube breakage rate exceeding 12% per year. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a deep ultraviolet LED-based three-dimensional irradiation water channel ecological management system, comprising:

[0005] Shore-based irradiation subsystem, suspended mobile irradiation subsystem, photovoltaic power supply subsystem and intelligent control subsystem;

[0006] The shore-based irradiation subsystem includes waterproof LED array walls arranged along both sides of the channel;

[0007] The suspended mobile irradiation subsystem includes a liftable truss structure erected across the channel and a deep ultraviolet LED module;

[0008] The photovoltaic power supply system includes solar panels, energy storage batteries and DC power conversion devices;

[0009] The intelligent control subsystem includes a water quality sensor network, an adaptive algorithm module and an actuator, and is used to realize dynamic regulation of irradiation parameters.

[0010] Preferably, the waterproof LED array wall of the shore-based irradiation subsystem adopts aluminum gallium nitride-based deep ultraviolet LED chips with a peak wavelength of 270±5nm, a power density of 50-100W / m, and an irradiation intensity of ≥30mW / cm on the water surface. 2 The installation angle is 15-75° and the oblique irradiation design is adjustable.

[0011] Preferably, the truss body of the suspended mobile irradiation subsystem is an aluminum alloy frame with an anodized surface; the lifting mechanism is a servo motor driven ball screw with a stroke of 0-3m and a positioning accuracy of ±2mm; the water level sensor adopts a composite detection of a laser rangefinder and a pressure sensor; the irradiation depth is effective underwater penetration ≥50cm, and the irradiation dose can be automatically adjusted according to the flow rate.

[0012] Preferably, the sensor network of the intelligent control subsystem includes a chlorophyll a online monitor, a CDOM fluorescence sensor and a multi-parameter water quality probe; the control logic includes an irradiation dose algorithm and pulse control, the irradiation dose algorithm is Dose = ∫(I(t) × e^(-αd))dt, the pulse control duty cycle is adjustable from 10% to 80%, and the minimum time resolution is 0.1s.

[0013] Preferably, the photovoltaic power supply system uses a monocrystalline silicon solar cell panel with a conversion efficiency of ≥22.5%;

[0014] The energy storage battery is a lithium iron phosphate battery pack with a capacity of ≥1MWh and a cycle life of >6000 times;

[0015] The power conversion device is an MPPT controller with a conversion efficiency of >98% and an output voltage of 36-54V DC.

[0016] Preferably, the shore-based irradiation subsystem is additionally provided with a spectral filter membrane with a cut-off wavelength of 240 nm and a transmittance of less than 1% in the band below 240 nm; and an irradiation gradient attenuation zone is provided, and the intensity within the range of 0-2 m from the shoreline meets a specific attenuation law.

[0017] Preferably, the control logic of the suspended mobile irradiation subsystem includes a highly adaptive algorithm, flow rate feedback control and a dual-wavelength collaborative mode, which adjusts the irradiation parameters according to the real-time water depth and flow rate, and performs linkage control of the 275nm main wavelength algaecide and the 235nm auxiliary wavelength pollutant decomposition.

[0018] Preferably, the LED module layout of the suspended mobile irradiation subsystem satisfies the requirement that the module spacing is positively correlated with the water depth, and the irradiation overlap rate of adjacent modules is ≥30%; in the curved channel section, the spacing between the shore-based irradiation walls is reduced, and a horizontal rotation mechanism is added to the suspended subsystem to increase the irradiation intensity on the outside of the curve.

[0019] Preferably, the software architecture of the intelligent control subsystem includes a data acquisition layer, a decision layer and an execution layer, which obtains sensor data through the Modbus protocol, dynamically adjusts irradiation parameters based on the PID algorithm, and generates a PWM signal to control the LED drive power supply.

[0020] On the other hand, the present invention also provides a method for ecological management of water channels using deep ultraviolet LED-based three-dimensional irradiation, comprising:

[0021] Arrange a shore-based irradiation subsystem and a suspended mobile irradiation subsystem along the channel, and connect the channel-arranged shore-based irradiation subsystem and the suspended mobile irradiation subsystem to a photovoltaic power supply subsystem;

[0022] Real-time collection of chlorophyll a, DOC, flow rate and water depth data through the intelligent control subsystem;

[0023] Calculating the target irradiation dose based on the chlorophyll a, DOC, flow rate and water depth data, and dynamically adjusting the LED intensity, pulse mode and height of the suspended mobile irradiation subsystem;

[0024] Start dual-wavelength synergistic irradiation to simultaneously kill algae and degrade pollutants;

[0025] Irradiation parameters are optimized based on the biological monitoring data of the intelligent control subsystem to achieve ecologically safe operation.

[0026] Compared with the prior art, the present invention has the following advantages and technical effects:

[0027] The present invention discloses a water channel ecological management system and method based on deep ultraviolet LED three-dimensional irradiation. The system includes a shore-based irradiation subsystem, a suspended mobile irradiation subsystem, a photovoltaic power supply subsystem and an intelligent control subsystem. The 275nm deep ultraviolet light is used to accurately destroy the photosystem II reaction center of algae (the inactivation rate of PsbA protein is greater than 95%), and the 235nm auxiliary wavelength is combined to decompose organic pollutants, thereby achieving algae inactivation and water purification simultaneously. The suspension unit adopts a ball screw lifting mechanism (positioning accuracy of ±2mm) to adapt to water level fluctuations, and the photovoltaic direct supply system reduces carbon emissions by 63%. The system can reduce algae biomass by 92%, remove DOC by 41%, and has no toxic effects on fish (LC50>100mW / cm 2 The present invention overcomes the pollution risk of traditional mercury lamps and the ecological hazards of chemical methods, and provides a green treatment solution for long-distance water diversion projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

[0029] Figure 1 This is a schematic flow chart of a method according to an embodiment of the present invention, wherein: 1. Shore-based irradiation subsystem; 2. Photovoltaic power supply subsystem; 3. Suspended mobile irradiation subsystem; 4. Intelligent control subsystem.

[0030] Figure 2 This is a cross-sectional view of the structure of the suspended mobile irradiation subsystem of an embodiment of the present invention, wherein 301, servo motor; 302, dual guide rails; 303, ball screw transmission system; 304, mechanical limit switch; 305, spectral filter; 306, LED module; 307, laser rangefinder; 309, pressure sensor; 309, lithium iron phosphate energy storage battery pack; 310, MPPT controller;

[0031] Figure 3 This is a cross-sectional view of the structure of the intelligent control subsystem of an embodiment of the present invention (taking a single-side shore-based system as an example), wherein 401 is the main body of the intelligent control subsystem; 402 is a chlorophyll a fluorescence sensor; 403 is a dissolved organic carbon (DOC) analyzer; 404 is a Doppler flowmeter; 405 is an acoustic and optical fish drive device; 406 is a biological toxicity monitoring unit; 407 is an emergency shutdown module; and 408 is a self-cleaning device.

[0032] Figure 4 This is a cloud diagram of the irradiation intensity distribution according to an embodiment of the present invention;

[0033] Figure 5 This is a graph showing the algae inactivation efficiency of an embodiment of the present invention;

[0034] Figure 6 This is a spectrum comparison diagram of LED and mercury lamp in an embodiment of the present invention;

[0035] Figure 7 This is a graph showing the data of a zebrafish acute toxicity experiment according to an embodiment of the present invention;

[0036] Figure 8 is the algae pigment absorption spectrum of an embodiment of the present invention;

[0037] Figure 9 This is a flow chart of the intelligent control module according to an embodiment of the present invention;

[0038] Figure 10 This is a performance test chart of the spectral filter membrane according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0041] Example 1

[0042] like Figure 1-2 As shown, this embodiment provides a three-dimensional irradiation water channel ecological management system based on deep ultraviolet LEDs, including:

[0043] 1. Shore-based irradiation subsystem 1,

[0044] Structure: Waterproof LED array walls are arranged at intervals of 50-200m along both sides of the channel, which is the shore-based irradiation subsystem 1.

[0045] Technical parameters:

[0046] Light source: Aluminum gallium nitride (AlGaN)-based deep ultraviolet LED chip, peak wavelength 270±5nm; power density: 50-100W / m, irradiation intensity on the water surface ≥30mW / cm 2 ;Installation angle: 15-75° adjustable oblique irradiation design;

[0047] Specific functional parameters of photovoltaic power supply subsystem 2:

[0048] Type: Monocrystalline silicon solar panel; Conversion efficiency ≥ 22.5%; Single panel power: 330W; Total power configuration: 500kWp / km; Inclination angle: 40±5° (adjustable); Protection level: IP68; MPPT controller 35 efficiency: >98%; Energy storage battery: Lithium iron phosphate (power ≥ 1MWh);

[0049] Optical design: Irradiation depth: Underwater effective penetration ≥50cm ( Figure 3 CFD simulation); Dynamic adjustment: Automatically adjust the irradiation dose according to the flow rate (0.5-3m / s);

[0050] 2. Suspended mobile irradiation subsystem 3, including servo motor 301; dual guide rails 302; ball screw drive system 303; mechanical limit switch 304; spectral filter 305; LED module 306; laser rangefinder 307; pressure sensor 308; lithium iron phosphate energy storage battery pack 309; MPPT controller 310;

[0051] Mechanical structure such as Figure 2 As shown: Truss body: aluminum alloy frame (surface anodized); lifting mechanism: servo motor 301 drives ball screw (stroke 0-3m, positioning accuracy ±2mm); water level sensor: laser rangefinder 307 + pressure sensor 308 composite detection;

[0052] 3. Intelligent control subsystem 4, including: intelligent control subsystem body 401; chlorophyll a fluorescence sensor 402; dissolved organic carbon (DOC) analyzer 403; Doppler flowmeter 404; sound and light fish repelling device 405; biological toxicity monitoring unit 406; emergency shutdown module 407; and self-cleaning device 408.

[0053] Sensor network: Chlorophyll a online monitor (detection limit 0.1 μg / L); CDOM fluorescence sensor (excitation wavelength 370 nm); multi-parameter water quality probe (pH / DO / ORP);

[0054] Control logic: Irradiation dose algorithm: Dose = ∫ (I (t) × e^ (-αd)) dt (α = 0.23 cm -1 is the water body attenuation coefficient);

[0055] Pulse control: Duty cycle 10% to 80% adjustable, minimum time resolution 0.1s;

[0056] The technical effects of this embodiment are: (1) Figure 4 As shown, the spectrum-mechanical synergy: the main wavelength of 275nm inactivates the algae photosynthetic system II, combined with the auxiliary wavelength of 235nm to decompose microcystins;

[0057] (2) Stereoscopic dose control: The horizontal irradiation wall and the vertical moving unit form a three-dimensional irradiation field to ensure that the CT value (concentration × time) is greater than 40 mg·min / L;

[0058] (3) Ecological safety design:

[0059] Design of gradient attenuation of radiation intensity in nearshore area (intensity ≤5mW / cm2 at 2m from shore) 2 ), DC 48V safe voltage power supply, electromagnetic radiation <10μT, data acquisition → dose calculation → execution control closed-loop logic, including the following key nodes:

[0060] Input: Chlorophyll a concentration, flow rate, water depth; Processing: PID control algorithm based on CT value (concentration × time); Output: Duty cycle adjustment signal, lifting mechanism control instruction; PID control algorithm; Mathematical model:

[0061] Related parameters;

[0062] u(t): output signal of the controller; e(t): error, that is, the difference between the set value and the actual value; K p : Proportional coefficient, which determines the response intensity to the current error; K i : Integral coefficient, eliminating steady-state error (accumulated historical error); K d : differential coefficient, suppressing future error changes (forecasting trends);

[0063] In practical applications, the target CT value required is adjusted according to the pollution conditions of different application scenarios to determine the e(t) error output and adjust the LED pulse width and the height of the suspended mobile irradiation subsystem 3.

[0064] Example 2

[0065] This embodiment provides a deep ultraviolet LED-based three-dimensional irradiation water channel ecological management system, including:

[0066] A rectangular channel (bottom width 8m, water depth 4m);

[0067] Hardware configuration:

[0068] Shore-based irradiation subsystem 1: 1km long on one side, 100m apart, each unit contains 120 LEDs (single LED light power 50mW); suspended mobile irradiation subsystem 3: 36 modules, each containing 24 LEDs, total power 4.32kW; photovoltaic power supply subsystem 2: 500kWp monocrystalline silicon panels, energy storage system 1MWh;

[0069] Operating parameters: Day mode: pulse irradiation (5s on / 15s off), average power 1.2kW Night mode: continuous irradiation, intensity automatically reduced by 30% Lift control: response time <30s when water level fluctuation is ±1m;

[0070] Verification data (run continuously for 30 days):

[0071] Algae biomass: decreased from 1580μg / L to 126μg / L (decreased by 92%), DOC removal rate: 41.2% (UV-Vis detection of 254nm absorbance), fish impact: difference in SOD activity in the hepatopancreas of crucian carp p = 0.38 (t test), such as Figure 5 As shown, energy consumption: 0.07 yuan / m 3 (Compared with the mercury lamp solution of 0.21 yuan / m 3 );

[0072] Example 3

[0073] This embodiment provides a deep ultraviolet LED-based three-dimensional irradiation water channel ecological management system, including:

[0074] Trapezoidal cross-section test section (daily water level fluctuation ±1.2m);

[0075] Scene characteristics:

[0076] Channel shape: trapezoidal cross-section, bottom width 6m, top width 10m, water depth 3.5m.

[0077] Water flow characteristics: flow rate 1.8m / s, stable flow direction, but there is a small amount of sediment at the bottom.

[0078] Algae distribution: Due to the trapezoidal cross-section characteristics, algae are concentrated in the bottom and slope areas.

[0079] Technical adjustments:

[0080] Shore-based irradiation subsystem 1 layout: Deployed along the slopes on both sides of the trapezoidal channel, with a spacing of 80m, to ensure irradiation coverage of the bottom and slope areas. The irradiation intensity in the bottom and slope areas is increased by 20% to compensate for the algae enrichment characteristics. A dual-wavelength LED array (275nm + 235nm) is used.

[0081] Optimization of the suspended mobile irradiation subsystem 3: The vertical lifting range is expanded to 0-4.5m to adapt to water level fluctuations. The horizontal rotation angle is expanded to ±45° to ensure that there is no blind spot in the irradiation coverage.

[0082] Water quality sensor optimization: Add online nitrate monitoring and control 235nm irradiation dose (to ensure NO2- increment <0.01mg / L)

[0083] 6. Operation results analysis

[0084] Algae removal effect: Algae removal rate in the bottom and slope areas was 84.1%, and in the straight area it was 89.2%. Microcystin-LR removal rate was 98.7%, and Daphnia magna activity inhibition rate was 3.2%.

[0085] Example 4

[0086] This embodiment provides a deep ultraviolet LED-based three-dimensional irradiation water channel ecological management system, including:

[0087] Verification of adaptability of curved channel sections;

[0088] Scenario characteristics: channel bend radius 150m, water flow rate 2.1m / s;

[0089] Technical adjustment: The suspended mobile irradiation unit 3 is equipped with a deflection mechanism (±30° horizontal rotation), which increases the irradiation intensity on the outside of the curve by 20% (to compensate for the algae enrichment caused by centrifugal force)

[0090] The spacing of shore-based irradiation subsystem 1 is adjusted to 80m to match the curvature

[0091] Operation results: The algae removal rate in the curved area is 89.5% (compared to 92.1% in the straight section), and the energy consumption increase rate is less than 8% (due to the additional power consumption of the deflection mechanism).

[0092] Example 5

[0093] This embodiment provides a deep ultraviolet LED-based three-dimensional irradiation water channel ecological management system, including:

[0094] Application of circular channels

[0095] 1. Scenario Characteristics: Channel Shape: Circular cross-section, 10m diameter, 3.5m depth. Flow Characteristics: Velocity: 1.8m / s, tangential to the circumference. Algae Distribution: Due to centrifugal force, algae accumulate on the outer channel walls.

[0096] 2. Technical Adjustments: Irradiation wall layout: Spacing has been reduced to 80m to accommodate the curvature of the circular channel. Irradiation intensity on the outer side has been increased by 15% to compensate for algae accumulation caused by centrifugal force. Optimization of the suspended mobile irradiation subsystem: The horizontal rotation angle has been expanded to ±45°, ensuring comprehensive irradiation coverage. Dual redundant water level sensors have been added to improve lift control accuracy.

[0097] 3. Operational Results: 91.2% algae removal rate on the outer channel wall and 88.5% on the inner channel wall. The horizontal rotation mechanism consumed only 5% additional power. Crucian carp mortality was 0%, and Daphnia magna activity inhibition was 2.8%.

[0098] Example 6

[0099] This embodiment provides a deep ultraviolet LED-based three-dimensional irradiation water channel ecological management system, including:

[0100] Application of irregular cross-section channels

[0101] 1. Scenario Characteristics: Channel Shape: Irregular cross-section, width ranges from 6-12 meters, and water depths range from 2-5 meters. Flow Characteristics: Flow velocity ranges from 1.5-2.5 m / s, with complex flow directions and the presence of localized eddies. Algae Distribution: Due to the irregular cross-section, algae are concentrated in areas with slow flow (such as concave banks and bends).

[0102] 2. Technical Adjustments: Irradiation Wall Layout: Spacing is dynamically adjusted based on cross-section width (50-150m) to ensure comprehensive irradiation coverage. Irradiation intensity is increased by 25% in concave banks and bends to compensate for algae accumulation caused by slow water flow. Optimization of the Suspended Mobile Irradiation Unit 3: The adaptive lifting range has been expanded to 0-5.5m to accommodate varying water depths. The horizontal rotation angle has been increased to ±60° to ensure irradiation coverage even in complex water flow conditions.

[0103] 3. Operation results analysis

[0104] Algae removal effect: The algae removal rate in the concave bank and curved areas is 83.6%, and the removal rate in the straight area is 90.7%, with the overall effect being balanced.

[0105] Energy consumption optimization: Dynamically adjust the irradiation intensity to accurately match the distribution characteristics of algae and avoid energy waste.

[0106] Example 6

[0107] This embodiment provides a deep ultraviolet LED-based three-dimensional irradiation water channel ecological management system, including:

[0108] Shore-based irradiation subsystem 1: A modular deep ultraviolet LED array is symmetrically arranged along both sides of the channel, emitting ultraviolet light in the 265-285nm band;

[0109] Photovoltaic power supply subsystem 2: integrated solar panels, energy storage batteries and DC power conversion devices;

[0110] Suspended mobile irradiation subsystem 3: A cross-channel, retractable truss structure equipped with a vertical lift mechanism and deep ultraviolet LED modules;

[0111] Intelligent Control Subsystem 4: Includes a water quality sensor network, adaptive algorithm modules, and actuators to achieve dynamic control of irradiation parameters. Water quality sensors: Includes a fluorescence sensor (detects chlorophyll a, two are deployed every 10 meters, cross-checked, and a self-test is triggered when the data difference exceeds 10%, switching to the backup sensor), a dissolved organic carbon (DOC) analyzer (master-slave dual probe; if the master probe fails, the slave probe takes over and calibrates the historical data), and an ultrasonic Doppler flowmeter (with dual probes installed orthogonally, dynamically compensates for turbulence errors, and switches to the backup probe in the event of an abnormality).

[0112] Furthermore, the deep ultraviolet LED module of the shore-based irradiation subsystem 1 meets the following requirements: peak wavelength 275±5nm, spectral half-peak width <12nm; single LED chip light power ≥50mW, module power density 50-100W / m; installation angle adjustable 15-75°, forming a cross-coverage irradiation network.

[0113] Furthermore, the deep ultraviolet LED module includes: an AlGaN-based semiconductor chip, packaged on an aluminum nitride ceramic substrate, with a thermal resistance of less than 1.5°C / W; a quartz protective lens, with an ultraviolet transmittance of more than 90% (@275nm); and an IP68-level waterproof casing with a water pressure resistance depth of ≥10m.

[0114] Furthermore, the lifting mechanism of the suspended mobile irradiation subsystem 3 includes: a servo motor 301 with a rated torque ≥5 N·m and equipped with an absolute encoder; dual guide rails 302, a ball screw transmission system 303 with a stroke of 0-3m and a positioning accuracy of ±2mm; a dual redundant water level detection unit consisting of a laser rangefinder 307 and a pressure sensor 309; and a mechanical limit switch 303 with a triggering accuracy of ±1mm.

[0115] Furthermore, the intelligent control subsystem 4 includes: sensing units: chlorophyll a fluorescence sensor 402, with a detection range of 0.1-500 μg / L; dissolved organic carbon (DOC) analyzer 403, based on ultraviolet oxidation-NDIR detection technology; Doppler flow meter 404, with an accuracy of ±0.05 m / s;

[0116] Control unit: irradiation dose algorithm module, real-time calculation of CT value (Dose=∫I(t)·e -αd dt); a pulse modulation module with an adjustable duty cycle of 10% to 80% and a minimum time resolution of 0.1s. Furthermore, the photovoltaic power supply subsystem 2 includes: a monocrystalline silicon solar cell array with a conversion efficiency of ≥22.5%; a lithium iron phosphate energy storage battery pack 34 with a capacity of ≥1MWh and a cycle life of >6000 cycles (@80% DoD); and an MPPT controller 35 with a conversion efficiency of >98% and an output voltage of 36-54V DC.

[0117] Furthermore, the shore-based irradiation subsystem 1 is additionally provided with:

[0118] like Figure 9 As shown, the spectral filter film 304 has a cut-off wavelength of 240 nm and a transmittance of less than 1% in the wavelength band below 240 nm. The performance of the spectral filter film is as follows: Figure 10 shown.

[0119] In the radiation gradient attenuation zone, the intensity within 0-2m from the shoreline meets the following requirements:

[0120] I(x)=I0·e -kx (k=0.5m -1 ,I0≥30mW / cm 2 )

[0121] Furthermore, the control logic of the suspended mobile irradiation subsystem 3 includes:

[0122] Height adaptive algorithm: adjusts the target height according to the real-time water depth hwater:

[0123]

[0124] Flow rate feedback control: For every 1m / s increase in flow rate, the pulse duty cycle increases by 20%;

[0125] Dual-wavelength collaborative mode: 275nm main wavelength for algae removal and 235nm auxiliary wavelength for pollutant decomposition are controlled in a coordinated manner.

[0126] Furthermore, ecological protection components are provided: an acoustic and optical fish repellent device 405, with an operating frequency of 20-100kHz and a sound pressure level ≥140dB; a biological toxicity monitoring unit 406, which detects the avoidance behavior of fish and enzyme activity indicators in the water in real time; and an emergency shutdown module 407, which cuts off the power supply within 0.5s when a large organism is detected entering the irradiation zone.

[0127] Furthermore, the LED module layout of the suspended mobile irradiation subsystem 3 satisfies: the module spacing is positively correlated with the water depth, satisfying the formula: D=0.25h+0.1 (D: module spacing / m, h: water depth / m); and the irradiation overlap rate of adjacent modules is ≥30%.

[0128] Furthermore, in the optimized design of the curved channel section: the spacing of the shore-based irradiation subsystem 1 is reduced to 80% of that of the straight section; a horizontal rotation mechanism (±30°) is added to the suspended mobile irradiation subsystem 3 to compensate for the algae enrichment caused by centrifugal force; and the irradiation intensity on the outer side of the curve is increased by 20%.

[0129] Furthermore, the software architecture of the intelligent control subsystem 4 includes: a data acquisition layer: acquiring sensor data through the Modbus protocol; a decision layer: dynamically adjusting irradiation parameters based on the PID algorithm; and an execution layer: generating a PWM signal to control the LED driving power supply.

[0130] Furthermore, a maintenance warning mechanism is set up: the LED light decay monitoring module triggers an alarm when the light power drops to 70% of the initial value; the self-cleaning device 408 uses a compressed air blowing system with a cleaning cycle of ≤72 hours.

[0131] Furthermore, the algaecide efficiency of the irradiation system meets the following requirements: inhibition rate of ATPase activity of filamentous algae ≥ 95%; degradation rate of microcystin-LR ≥ 96%; operating energy consumption ≤ 0.08 yuan / m 3 .

[0132] Further, comprising steps such as Figure 8 As shown:

[0133] Step S1: Deploy the shore-based irradiation subsystem 1 and the suspended mobile irradiation subsystem 3 along the channel and connect them to the photovoltaic power supply subsystem 2;

[0134] Step S2: collecting chlorophyll a, DOC, flow velocity and water depth data in real time through the sensor network;

[0135] Step S3: Calculate the target irradiation dose and dynamically adjust the LED intensity, pulse mode and the height of the suspended mobile irradiation subsystem 3;

[0136] Step S4: start dual-wavelength synergistic irradiation to simultaneously kill algae and degrade pollutants;

[0137] Step S5: Optimize irradiation parameters based on biological monitoring data to achieve ecologically safe operation.

[0138] This embodiment also includes the fish acute toxicity test in Table 1 and the Daphnia magna activity inhibition test in Table 2. Figure 6-7 As shown:

[0139] Table 1

[0140]

[0141] Table 2

[0142]

[0143] The above are merely preferred embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A deep ultraviolet LED-based three-dimensional irradiation water channel ecological management system, characterized in that: include: Shore-based irradiation subsystem, suspended mobile irradiation subsystem, photovoltaic power supply subsystem and intelligent control subsystem; The shore-based irradiation subsystem includes waterproof LED array walls arranged along both sides of the channel; The suspended mobile irradiation subsystem includes a liftable truss structure erected across the channel and a deep ultraviolet LED module; The photovoltaic power supply system includes solar panels, energy storage batteries and DC power conversion devices; The intelligent control subsystem includes a water quality sensor network, an adaptive algorithm module and an actuator, and is used to realize dynamic regulation of irradiation parameters.

2. The system according to claim 1, wherein: The waterproof LED array wall of the shore-based irradiation subsystem adopts aluminum gallium nitride-based deep ultraviolet LED chips with a peak wavelength of 270±5nm, a power density of 50-100W / m, and an irradiation intensity of ≥30mW / cm on the water surface. 2 The installation angle is 15-75° and the oblique irradiation design is adjustable.

3. The system according to claim 1, wherein: The truss body of the suspended mobile irradiation subsystem is an aluminum alloy frame with an anodized surface. The lifting mechanism is a servo motor-driven ball screw with a stroke of 0-3m and a positioning accuracy of ±2mm. The water level sensor uses a laser rangefinder and a pressure sensor for composite detection. The irradiation depth is effective underwater penetration ≥50cm, and the irradiation dose can be automatically adjusted according to the flow rate.

4. The system according to claim 1, wherein: The sensor network of the intelligent control subsystem includes an online chlorophyll a monitor, a CDOM fluorescence sensor, and a multi-parameter water quality probe; the control logic includes an irradiation dose algorithm and pulse control. The irradiation dose algorithm is Dose=∫(I(t)×e^(-αd))dt, the pulse control duty cycle is adjustable from 10% to 80%, and the minimum time resolution is 0.1s.

5. The system according to claim 1, wherein: The photovoltaic power supply system adopts monocrystalline silicon solar panels with a conversion efficiency of ≥22.5%; The energy storage battery is a lithium iron phosphate battery pack with a capacity of ≥1MWh and a cycle life of >6000 times; The power conversion device is an MPPT controller with a conversion efficiency of >98% and an output voltage of 36-54V DC.

6. The system according to claim 1, wherein: The shore-based irradiation subsystem is equipped with a spectral filter membrane with a cutoff wavelength of 240nm and a transmittance of less than 1% in the band below 240nm; and an irradiation gradient attenuation zone is provided, and the intensity within the range of 0-2m from the shoreline meets a specific attenuation law.

7. The system according to claim 1, wherein: The control logic of the suspended mobile irradiation subsystem includes a highly adaptive algorithm, flow rate feedback control and a dual-wavelength collaborative mode. It adjusts irradiation parameters according to real-time water depth and flow rate, and performs linkage control of 275nm main wavelength algae removal and 235nm auxiliary wavelength pollutant decomposition.

8. The system according to claim 1, wherein: The LED module layout of the suspended mobile irradiation subsystem satisfies the requirement that the module spacing is positively correlated with the water depth, and the irradiation overlap rate of adjacent modules is ≥30%. In the curved channel section, the spacing between the shore-based irradiation walls is reduced, and a horizontal rotation mechanism is added to the suspended subsystem to improve the irradiation intensity on the outer side of the curve.

9. The system according to claim 1, wherein: The software architecture of the intelligent control subsystem includes a data acquisition layer, a decision layer, and an execution layer. It obtains sensor data through the Modbus protocol, dynamically adjusts irradiation parameters based on the PID algorithm, and generates a PWM signal to control the LED driver power supply.

10. A method for ecological management of water channels using deep ultraviolet LED irradiation, characterized in that: include: Arrange a shore-based irradiation subsystem and a suspended mobile irradiation subsystem along the channel, and connect the channel-arranged shore-based irradiation subsystem and the suspended mobile irradiation subsystem to a photovoltaic power supply subsystem; Real-time collection of chlorophyll a, DOC, flow rate and water depth data through the intelligent control subsystem; Calculating the target irradiation dose based on the chlorophyll a, DOC, flow rate and water depth data, and dynamically adjusting the LED intensity, pulse mode and height of the suspended mobile irradiation subsystem; Start dual-wavelength synergistic irradiation to simultaneously kill algae and degrade pollutants; Irradiation parameters are optimized based on the biological monitoring data of the intelligent control subsystem to achieve ecologically safe operation.

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