A cluster ultrasonic algal bloom inactivation device

Abstract

The present invention provides a cluster ultrasonic algae bloom inactivation device, comprising an algae removal boat, a cluster ultrasonic vibration plate group arranged on the algae removal boat, and a control module electrically connected to the cluster ultrasonic vibration plate group. The cluster ultrasonic vibration plate group comprises a plurality of cluster ultrasonic vibration plates, which are arranged on both sides of the hull of the algae removal boat. The cluster ultrasonic vibration plates are connected to the hull through a flip component so that the cluster ultrasonic vibration plates can rotate relative to the water surface. The control module controls the flip component to drive the cluster ultrasonic vibration plates to rotate to a corresponding angle according to the area and biomass of algae distribution, and controls the opening / closing of each cluster ultrasonic vibration plate, thereby achieving large-scale and rapid inactivation of algae substances, causing them to lose buoyancy and photosynthetic activity, and then die and sink to the bottom of the water.

Description

Technical Field

[0001] The present invention relates to the technical field of water environment restoration devices, and in particular to a cluster ultrasonic algae bloom inactivation device. Background Art

[0002] The rapid expansion of cities has resulted in excessively high concentrations of nutrients such as nitrogen and phosphorus (N, P) in water bodies, accelerating the process of primary production and eutrophication. Some autotrophic organisms, such as cyanobacteria and green algae, absorb these high-nutrient substances. As the degree of eutrophication in lakes, rivers and other water bodies deepens, these types of autotrophic organisms multiply in large numbers to form dominant groups, floating on the surface of the water to form visible accumulation groups, thus forming algal blooms. If these algal blooms are not effectively treated, they will lead to the death of a large number of aquatic plants and animals, and will also aggravate the odor, affecting residents' water use.

[0003] Existing algae removal technologies include biological, chemical and physical methods. Although the biological method can achieve the purpose of controlling algae growth, it has a long cycle and is not suitable for the treatment of sudden algal blooms; although the chemical method can kill algae quickly, it cannot guarantee that chemical reagents will not cause secondary pollution to the water body; the traditional physical method, namely the ultrasonic algae removal process, uses an ultrasonic algae inactivation device, which uses the mechanical energy of ultrasound to make the algae cells pulsate, thereby causing bubbles and organelles in the cell medium to rupture and be damaged, achieving the purpose of low-power ultrasonic control and killing of cyanobacteria.

[0004] This traditional ultrasonic algae inactivation device is not very targeted and only roughly inactivates algae in the water body. The distribution of algae in polluted water bodies is often diverse, so the traditional ultrasonic algae inactivation device is not suitable for efficient multi-scene operations. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a cluster ultrasonic algae bloom inactivation device, which can achieve large-scale and rapid inactivation of algae, causing them to lose buoyancy and photosynthetic activity, and then die and sink to the bottom of the water.

[0006] The present invention provides a cluster ultrasonic algae bloom inactivation device, comprising: an algae removal boat, a cluster ultrasonic vibration plate group arranged on the algae removal boat, and a control module electrically connected to the cluster ultrasonic vibration plate group. The cluster ultrasonic vibration plate group includes multiple cluster ultrasonic vibration plates, and the multiple cluster ultrasonic vibration plates are arranged on both sides of the hull of the algae removal boat. The cluster ultrasonic vibration plates are connected to the hull through a flip component so that the cluster ultrasonic vibration plates can rotate relative to the water surface. The control module controls the flip component to drive the cluster ultrasonic vibration plates to rotate to a corresponding angle according to the area and biomass of algae distribution, and controls the opening / closing of each cluster ultrasonic vibration plate.

[0007] Optionally, the cluster ultrasonic vibration plate includes a shell and a plurality of vibrators arrayed flatly in the shell. The shell is connected to the flip component, and the plurality of vibrators are connected in series. The number of vibrators in each cluster ultrasonic vibration plate is 30-50, and the directions of two adjacent vibrators are staggered.

[0008] Optionally, the vibrator is made of a ceramic chip.

[0009] Optionally, the frequency of a single vibrator is 15kHz-35kHz.

[0010] Optionally, the distance between two adjacent cluster ultrasonic vibration plates located on the same side of the hull is 0.5m-1m.

[0011] Optionally, the rotation angle of the cluster ultrasonic vibration plate is 90°.

[0012] Optionally, the flipping component includes a motor fixed on the hull of the algae removal boat, the output shaft of the motor is arranged horizontally, the output shaft of the motor is fixedly connected with a connecting rod, and the connecting rod is fixedly connected to the cluster ultrasonic vibration plate.

[0013] Optionally, the cluster ultrasonic algae bloom inactivation device also includes a drone and a multispectral water quality data acquisition module mounted on the drone, the multispectral water quality data acquisition module is used to acquire water surface data, the control module includes: an ultrasonic control system and a processor, the ultrasonic control system is electrically connected to the cluster ultrasonic vibration plate group and the processor, the processor is communicatively connected to the multispectral water quality data acquisition module, the processor is used to obtain the area and biomass of algae distribution based on water surface data analysis, thereby controlling the flipping component to drive the cluster ultrasonic vibration plate to rotate to a corresponding angle, and triggering the ultrasonic control system to start the corresponding working mode, and the ultrasonic control system is used to control the opening / closing of each cluster ultrasonic vibration plate according to the working mode.

[0014] Optionally, the ultrasonic control system includes three working modes. The first working mode corresponds to turning on / off the clustered ultrasonic vibration plates near the bow and stern, the second working mode corresponds to turning on / off multiple clustered ultrasonic vibration plates spaced apart on both sides of the algae removal boat, and the third working mode corresponds to turning on / off all clustered ultrasonic vibration plates.

[0015] Optionally, when the biomass is less than 20 mg / L, select the first working mode; when the biomass is between 20 mg / L-80 mg / L, select the second working mode; when the biomass is greater than 80 mg / L, select the third working mode; when the first working mode is selected, the cluster ultrasonic vibration plate is perpendicular to the water surface; when the second working mode or the third working mode is selected, if the algae distribution area is less than or equal to 1,000 square meters, the cluster ultrasonic vibration plate is parallel to the water surface; if the algae distribution area is greater than 1,000 square meters, the cluster ultrasonic vibration plate is perpendicular to the water surface; when the biomass is greater than 50 mg / L, the cluster ultrasonic vibration plate first operates parallel to the water surface and then perpendicular to the water surface.

[0016] The technical solution provided by the embodiment of the present invention has the following advantages compared with the existing technology:

[0017] The present invention provided by the embodiment of the present invention provides a cluster ultrasonic algae bloom inactivation device. According to the water environment, the number of cluster ultrasonic vibration plates to be used is selected through the control module, thereby adjusting the spacing of the cluster ultrasonic vibration plates. Multi-beam emission can process multiple target areas at the same time, and can optimize the sound field distribution, eliminating areas that are difficult to cover with a traditional single beam. At the same time, the angle of the cluster ultrasonic vibration plate is adjusted by flipping the component to match different numbers of cluster ultrasonic vibration plates, so that the plate surface of the cluster ultrasonic vibration plate and the water surface can be arranged at multiple angles. According to the area and biomass of algae distribution, the cluster ultrasonic vibration plate is adjusted to the angle with the water surface. Parallel, the sound waves will remove algae in the vertical direction. Adjusting the cluster ultrasonic vibration plate to be perpendicular to the water surface will cause the sound waves to remove algae in the horizontal direction. The movement of the hull can adjust the path in real time based on the fluidity of the water body and the distribution of algae, changing the range of action of the ultrasound wave and making it more targeted. The mobile operation mode can optimize resource utilization, avoid repeated action on the same location, reduce energy consumption, improve the efficiency of ultrasound use and algae control, and rationally utilize ultrasonic energy. The energy is improved to be mobile, which can achieve large-scale and rapid inactivation of algae, causing them to lose buoyancy and photosynthetic activity, and then die and sink to the bottom of the water. Through the cluster design and layout improvement of the cluster ultrasonic vibration plate, the traditional single ultrasonic beam is changed to multiple beams, the operation mode is changed from in-situ disposal to mobile disposal, and the orientation of the cluster ultrasonic vibration plate is changed from fixed to flexible adjustment. The operation surface is more free, making the ultrasonic energy more concentrated, which can significantly improve the efficiency of algae removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A front view of a cluster ultrasonic algal bloom inactivation device provided by an embodiment of the present invention;

[0019] Figure 2 A top view of a cluster ultrasonic algal bloom inactivation device provided in an embodiment of the present invention;

[0020] Figure 3 A side view of a cluster ultrasonic algal bloom inactivation device provided by an embodiment of the present invention;

[0021] Figure 4 A diagram showing the internal structure of a cluster ultrasonic vibration plate provided in an embodiment of the present invention;

[0022] Figure 5 This is a diagram showing the effect of breaking algae cells using a cluster ultrasonic algae bloom inactivation device provided by an embodiment of the present invention;

[0023] Figure 6 A line graph showing the change in the ratio of intracellular chlorophyll content to extracellular chlorophyll after algae cells are treated with a cluster ultrasonic algae bloom inactivation device provided in an embodiment of the present invention;

[0024] Figure 7 This is the result of MTT staining observed under an optical microscope;

[0025] Figure 8 The results of the change of algae particle size composition by a cluster ultrasonic algae bloom inactivation device provided by an embodiment of the present invention;

[0026] Figure 9 This is the on-site work evaluation result of a cluster ultrasonic algal bloom inactivation device provided in an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1. UAV; 2. Multispectral water quality data acquisition module; 3. Algae removal boat; 4. Cluster ultrasonic vibration plate group; 40. Cluster ultrasonic vibration plate; 400. Housing; 401. Vibrator; 5. Ultrasonic control system; 6. Processor; 7. Generator. DETAILED DESCRIPTION

[0029] A specific embodiment of the present invention is described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] Compared to the in-situ treatment of algal blooms in relatively static lakes, the rapid flow and short residence time of algae in rivers make in-situ treatment of river-imported algal blooms significantly more challenging. Ultrasonic algae removal technology is the primary method for treating algal blooms in lakes. It utilizes the mechanical energy, cavitation, and thermal effects of ultrasound to pulsate algal cells, rupturing and damaging bubbles and organelles within the cell medium. This allows for low-power ultrasonic control and killing of cyanobacteria. Furthermore, ultrasound generates a large number of reactive oxygen species (ROS) such as superoxide ions, hydroxyl ions, and hydrogen peroxide within the algal cells. Elevated ROS levels can lead to lipid peroxidation, protein denaturation, and nucleic acid mutations in algal cells, further inhibiting photosynthesis and preventing further algal growth. However, conventional ultrasonic algae inactivation devices only provide a crude inactivation of algae in the water. The distribution of algae in contaminated waters is often diverse, so these devices cannot completely kill algae, resulting in inefficient algal bloom control.

[0032] To this end, an embodiment of the present invention provides a cluster ultrasonic algae bloom inactivation device, which can achieve large-scale and rapid inactivation of algae, causing them to lose buoyancy and photosynthetic activity, and then die and sink to the bottom of the water.

[0033] At least one embodiment of the present invention provides a cluster ultrasonic algae bloom inactivation device, comprising: an algae removal boat, a cluster ultrasonic vibration plate group arranged on the algae removal boat, and a control module electrically connected to the cluster ultrasonic vibration plate group, the cluster ultrasonic vibration plate group includes a plurality of cluster ultrasonic vibration plates, the plurality of cluster ultrasonic vibration plates are arranged on both sides of the hull of the algae removal boat, the cluster ultrasonic vibration plates are connected to the hull through a flip component so that the cluster ultrasonic vibration plates can rotate relative to the water surface, the control module controls the flip component to drive the cluster ultrasonic vibration plates to rotate to a corresponding angle according to the area and biomass of algae distribution, and controls the opening / closing of each cluster ultrasonic vibration plate.

[0034] In the cluster ultrasonic algae bloom inactivation device provided in the above-mentioned embodiment of the present invention, the algae removal intensity is selected according to the area and biomass of algae distribution, the number of cluster ultrasonic vibration plates to be used is selected through the control module, and the angle of the cluster ultrasonic vibration plates is adjusted by the flipping component. By rationally utilizing ultrasonic energy, large-scale and rapid inactivation of algae substances can be achieved, causing them to lose buoyancy and photosynthetic activity, and then die and sink to the bottom of the water.

[0035] The present invention is described below by means of several specific embodiments. To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and components may be omitted. When any component of an embodiment of the present invention appears in more than one drawing, the component may be represented by the same reference numeral in each drawing.

[0036] refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 This is a front view of a cluster ultrasonic algal bloom inactivation device provided by an embodiment of the present invention. Figure 2 A top view of a cluster ultrasonic algal bloom inactivation device provided in an embodiment of the present invention. Figure 3 A side view of a cluster ultrasonic algae bloom inactivation device provided in an embodiment of the present invention, as shown in FIG. Figure 1 、 Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a cluster ultrasonic algae bloom inactivation device, including: an algae removal boat 3, a cluster ultrasonic vibration plate group 4 arranged on the algae removal boat 3, and a control module electrically connected to the cluster ultrasonic vibration plate group 4, the cluster ultrasonic vibration plate group 4 includes a plurality of cluster ultrasonic vibration plates 40, and the plurality of cluster ultrasonic vibration plates 40 are arranged on both sides of the hull of the algae removal boat 3. The cluster ultrasonic vibration plates 40 are connected to the hull through a flip component so that the cluster ultrasonic vibration plates 40 can rotate relative to the water surface. The control module controls the flip component to drive the cluster ultrasonic vibration plates 40 to rotate to a corresponding angle according to the area and biomass of algae distribution, and controls the opening / closing of each cluster ultrasonic vibration plate 40.

[0037] The present invention provided by the embodiment of the present invention provides a cluster ultrasonic algae bloom inactivation device. According to the water environment, the number of cluster ultrasonic vibration plates to be used is selected through the control module, thereby adjusting the spacing of the cluster ultrasonic vibration plates. Multi-beam emission can process multiple target areas at the same time, and can optimize the sound field distribution, eliminating areas that are difficult to cover with a traditional single beam. At the same time, the angle of the cluster ultrasonic vibration plate is adjusted by flipping the component to match different numbers of cluster ultrasonic vibration plates, so that the plate surface of the cluster ultrasonic vibration plate and the water surface can be arranged at multiple angles. According to the area and biomass of algae distribution, the cluster ultrasonic vibration plate is adjusted to the angle with the water surface. Parallel, the sound waves will remove algae in the vertical direction. Adjusting the cluster ultrasonic vibration plate to be perpendicular to the water surface will cause the sound waves to remove algae in the horizontal direction. The movement of the hull can adjust the path in real time based on the fluidity of the water body and the distribution of algae, changing the range of action of the ultrasound wave and making it more targeted. The mobile operation mode can optimize resource utilization, avoid repeated action on the same location, reduce energy consumption, improve the efficiency of ultrasound use and algae control, and rationally utilize ultrasonic energy. The energy is improved to be mobile, which can achieve large-scale and rapid inactivation of algae, causing them to lose buoyancy and photosynthetic activity, and then die and sink to the bottom of the water. Through the cluster design and layout improvement of the cluster ultrasonic vibration plate, the traditional single ultrasonic beam is changed to multiple beams, the operation mode is changed from in-situ disposal to mobile disposal, and the orientation of the cluster ultrasonic vibration plate is changed from fixed to flexible adjustment. The operation surface is more free, making the ultrasonic energy more concentrated, which can significantly improve the efficiency of algae removal.

[0038] Specifically, multiple cluster ultrasonic vibration panels 40 are symmetrically arranged on both sides of the hull of the algae removal vessel 3. This symmetrical arrangement of the cluster ultrasonic vibration panels 40 prevents the installation and operation of the cluster ultrasonic vibration panels 40 from causing weight imbalance or dynamic offset in the hull, which could affect the stability and operability of the hull. It also ensures uniform distribution of the ultrasonic sound field on both sides, avoiding low algae removal efficiency or uneven operation on one side. It also allows the opposing ultrasonic vibrations to cancel each other out, reducing mechanical vibrations in the hull structure. The distribution of the cluster ultrasonic vibration panels 40 on both sides of the hull is the primary area of ​​water flow and the hull's intervention in algae. Concentrating the cluster ultrasonic vibration panels 40 on both sides can maximize removal efficiency. Due to physical installation limitations, the front and rear locations may involve the hull tip or propulsion equipment installation area, which are generally unsuitable for installation of cluster ultrasonic vibration panels 40. In addition, the cluster ultrasonic vibration panels 40 generate overlapping sound fields when in operation. Installing them on all four sides may cause interference or cancellation between the sound fields, thereby reducing efficiency and increasing the complexity of installation and operation.

[0039] In this embodiment, the number of clustered ultrasonic vibration plates 40 on a single side is an even number. The number of clustered ultrasonic vibration plates 40 is determined according to the size of the hull. Generally, 6 to 12 plates are installed. If the number is too small, the algae removal efficiency is too low. If the number is too large, the carrying capacity of the hull is affected. The even number is chosen for stability.

[0040] refer to Figure 4 , Figure 4 The internal structure diagram of the cluster ultrasonic vibration plate provided in the embodiment of the present invention is as follows: Figure 4As shown, the cluster ultrasonic vibration plate 40 includes a shell 400 and a plurality of vibrators 401 arrayed flatly in the shell 400. The shell 400 is connected to the flip component, and the plurality of vibrators 401 are connected in series. The number of vibrators 401 of each cluster ultrasonic vibration plate 40 is 30-50, and the directions of two adjacent vibrators 401 are staggered in reverse. The plurality of vibrators 401 are arrayed flatly in the shell 400, which can make the sound field distribution of the ultrasonic wave more uniform and the coverage range larger, avoid the algaecide efficiency drop or local over-focusing due to uneven sound field, and reduce interference and attenuation. The single-layer arrangement can reduce the interference between the vibrators, make the sound wave propagation more efficient, and avoid the waveform attenuation or mutual cancellation caused by the multi-layer arrangement. The single-layer design has a simple structure, which is beneficial to the improvement of the heat dissipation performance of the equipment and is more convenient for maintenance. Compared with the multi-layer arrangement, the design and production cost of the single-layer arrangement is lower and the structure is more compact. The number of vibrators 401 is 30-50, which has the following advantages: 1. Power density optimization. The more vibrators there are, the larger the sound field coverage is, but too many may lead to insufficient power density; too few vibrators will limit the sound field coverage, so 30-50 vibrators can achieve a balance between coverage and power density; 2. Adaptation to target volume. Algal bloom inactivation devices are usually designed for specific water areas and depths. The number of 30-50 vibrators can meet the algae control needs of medium-sized water bodies while avoiding unnecessary energy waste; 3. Portability and cost considerations. Too many vibrators will significantly increase the size and weight of the equipment, and the design of 30-50 vibrators can achieve algae control effects while maintaining the portability and economy of the device. The multiple vibrators 401 in series in the embodiment of the present invention are not a completely conventional design. The significance includes: 1. Phase optimization. The design of the staggered positive and negative vibrators makes the phase difference of the sound waves emitted by adjacent vibrators more reasonable, which can avoid the mutual cancellation of sound waves, thereby enhancing the stability and energy density of the sound field; 2. Improving power output. The series arrangement can improve the overall output power of the vibrators, making the intensity of the sound waves higher, which is beneficial to the inactivation of algal blooms; 3. Circuit simplification. The vibrators arranged in series are simpler in electrical connection, which is convenient for unified regulation and drive. If a parallel arrangement is adopted, the vibrators may affect each other, resulting in uneven power distribution, and even causing instability of the equipment. The vibrators in the embodiment of the present invention are arranged in a staggered positive and negative direction. The vibrators of the traditional cluster ultrasonic vibration plate 40 are usually arranged in the same direction. This arrangement is simple in structure and easy to manufacture, but has the following limitations:

[0041] 1. Insufficient vibration uniformity: Vibrators in the same direction may cause uneven distribution of the sound field, with strong ultrasonic intensity in some areas and weaker in other areas, affecting the overall effect; 2. Mutual interference problem: The ultrasonic beams of vibrators in the same direction may produce strong superposition or interference, resulting in local hot spots or blind spots, reducing the efficiency of applications such as cleaning and algae removal. By adopting the design of positive and negative staggered arrangement in the embodiment of the present invention, the above problems can be effectively solved, and the following improvements can be brought about: 1. Improved sound field uniformity, the staggered vibrators can emit ultrasonic waves in different directions, making the sound field distribution more uniform; 2. Reduced mutual interference, the ultrasonic beams in staggered directions reduce the wave superposition or interference between adjacent vibrators, optimize the propagation and distribution of energy, and enhance overall performance; 3. Improved vibration balance, the positive and negative staggered arrangement is more balanced in physical vibration, which helps to reduce the mechanical stress of the vibration plate, extend the service life of the equipment, and reduce operating noise and vibration; 4. Increased coverage, the positive and negative staggered vibrators can better cover the surface of complex structures, improve algae removal efficiency, and avoid local dead corners.

[0042] Optionally, the material of the vibrator 401 is a high-power piezoelectric ceramic chip. The diameter of the raw material compound of the ceramic chip can reach a nanometer-scale diameter after being abraded. Therefore, the rhombus structure unit cells inside the sintered piezoelectric ceramic chip are more than the irregular trapezoidal structure unit cells. Since the rhombus structure unit cells have 90° and 180° electric domains, the electric domains inside the irregular trapezoidal structure unit cells are disordered, so the piezoelectric ceramic has a higher piezoelectric coefficient value than conventional ceramics, which makes the electroacoustic conversion efficiency higher, the ultrasonic amplitude larger, and the mechanical loss smaller. In this way, the temperature generated when processing algae substances is lower, the thermal stability is better, and the dynamic capacitance change range is smaller, which allows the cluster ultrasonic vibration plate 40 to maintain a good load bandwidth width.

[0043] Specifically, the frequency of a single oscillator 401 is 15kHz-35kHz, and the total energy is 40-60W × 30-50W = 1.2-3.0kw. This frequency range is due to the following reasons: 1. Ultrasonic frequency is directly related to the cavitation effect, which is one of the key mechanisms for inactivating algal blooms. 15-35kHz belongs to the low-frequency ultrasonic range and easily forms a strong cavitation effect in water. Low-frequency ultrasonic cavitation has high cavitation intensity. When bubbles collapse, they release a high-temperature and high-pressure microenvironment, which can effectively destroy the cell walls and membranes of algae. If the frequency is too high, the cavitation effect is weakened, which may lead to poor inactivation results. At the same time, this frequency range is also adapted to the characteristics of algae cells. The algae cell walls are relatively tough, and the strong cavitation effect can more efficiently destroy the algae cell walls and cell membranes, thereby achieving the purpose of inactivation; 2. Low-frequency ultrasound attenuates slowly in water and propagates over a longer distance, which is conducive to covering a wider and deeper algae killing area; 3. From the perspective of biosafety, this frequency has relatively little impact on fish and other non-target organisms.

[0044] Specifically, the spacing between two adjacent cluster ultrasonic vibration plates 40 on the same side of the hull is 0.5m-1m. Ultrasonic waves have a limited propagation range in water. If the distance between adjacent cluster ultrasonic vibration plates 40 is too large, ultrasonic gaps will form between them, affecting the continuity and efficiency of algae inactivation. If the distance between adjacent cluster ultrasonic vibration plates 40 is too small, the generated ultrasonic waves may interfere with each other, causing ultrasonic frequency distortion and reducing the inactivation effect. Keeping the spacing within the 0.5m-1m range ensures sufficient ultrasonic coverage bandwidth on both sides of the hull, ensuring that each cluster ultrasonic vibration plate 40 can operate independently and efficiently, effectively inactivating algae.

[0045] Furthermore, the rotation angle of the cluster ultrasonic vibration plate 40 is 90°, so that the plate surface of the cluster ultrasonic vibration plate 40 and the water surface can be arranged at multiple angles, limiting the cluster ultrasonic vibration plate 40 to flip within 90°, avoiding excessive degrees of freedom causing structural instability or control difficulties. At the same time, 90° has met the needs of the cluster ultrasonic vibration plate 40 from vertical to horizontal. Exceeding the range will increase complexity and have no practical significance. When the algae biomass is high, the vibration plate is adjusted to be parallel to the water surface. At this time, the sound waves penetrate the water in a vertical direction, reducing lateral interference, and the energy is more concentrated, effectively destroying deep or local high-biomass algae, and improving the removal efficiency. When the operation scene is a shallow water area or the algae distribution area is large, the vibration plate is adjusted to be perpendicular to the water surface. At this time, the sound waves spread in the horizontal direction, which helps to cover a wider area.

[0046] Specifically, the flipping component includes a motor fixed on the hull of the algae removal boat 3, the output shaft of the motor is arranged horizontally, the output shaft of the motor is fixedly connected with a connecting rod 41, and the connecting rod 41 is fixedly connected to the cluster ultrasonic vibration plate 40. In this embodiment, a plurality of cluster ultrasonic vibration plates 40 can be driven to rotate simultaneously by one motor, or each cluster ultrasonic vibration plate 40 can be connected to a motor. Considering the consistency and timeliness of the rotation angle, it is preferred to set one motor.

[0047] In this embodiment, the cluster ultrasonic algae bloom inactivation device also includes a drone 1 and a multispectral water quality data acquisition module 2 mounted on the drone 1. The multispectral water quality data acquisition module 2 is used to acquire water surface data. The control module includes: an ultrasonic control system 5 and a processor 6. The ultrasonic control system 5 is electrically connected to the cluster ultrasonic vibration plate group 4 and the processor 6. The processor 6 is communicatively connected to the multispectral water quality data acquisition module 2. The processor 6 is used to obtain the area and biomass of algae distribution based on water surface data analysis, thereby controlling the flipping component to drive the cluster ultrasonic vibration plate 40 to rotate to a corresponding angle, and triggering the ultrasonic control system 5 to start the corresponding working mode. The ultrasonic control system 5 is used to control the opening / closing of each cluster ultrasonic vibration plate 40 according to the working mode. The multispectral water quality data acquisition module 2 includes: a multispectral sensor, a video capture module and a light measurement module. The multispectral sensor is used to measure the reflected light on the water surface, thereby collecting spectral data. The video capture module is used to capture water surface video image data. The light measurement module is used to collect light intensity data.

[0048] Optionally, the ultrasonic control system 5 includes three working modes. The first working mode corresponds to turning on / off the clustered ultrasonic vibration plates 40 near the bow and stern, the second working mode corresponds to turning on / off the multiple clustered ultrasonic vibration plates 40 spaced apart on both sides of the algae removal boat 3, and the third working mode corresponds to turning on / off all the clustered ultrasonic vibration plates 40.

[0049] In this embodiment, the hull carries 12 cluster ultrasonic vibration plates 40, which are arranged on both sides of the hull, 6 on each side. Figure 2 As shown, the algae removal boat is designed with three algae removal modes: A (first working mode), B (second working mode), and C (third working mode). Mode A can control 4 vibration plates, corresponding to Figure 2 1#, 6#, 7#, 12# vibration plates; B mode can control 8 vibration plates, corresponding to Figure 2 1#, 3#, 4#, 6#, 7#, 9#, 10#, 12# vibration plates; C mode can control 12 vibration plates, corresponding to Figure 2 The three algae removal modules are designed to adjust the number and spacing of the clustered ultrasonic vibration plates 40 according to the degree of water pollution, thereby improving the efficiency of ultrasonic use and algae control, while also significantly saving energy.

[0050] Specifically, when the biomass is less than 20 mg / L, the first working mode is selected; when the biomass is between 20 mg / L and 80 mg / L, the second working mode is selected; when the biomass is greater than 80 mg / L, the third working mode is selected; when the first working mode is selected, the cluster ultrasonic vibration plate 40 is perpendicular to the water surface; when the second working mode or the third working mode is selected, if the algae distribution area is less than or equal to 1,000 square meters, the cluster ultrasonic vibration plate 40 is parallel to the water surface; if the algae distribution area is greater than 1,000 square meters, the cluster ultrasonic vibration plate 40 is perpendicular to the water surface; when the biomass is greater than 50 mg / L, regardless of the size of the algae distribution area, the cluster ultrasonic vibration plate 40 first operates parallel to the water surface and then perpendicular to the water surface. Due to the uneven distribution of local algae, the principle of "high biomass (>50 mg / L) gives priority to the parallel direction" is adopted, and the parallel direction is used first, and then the vertical direction is switched to uniform cleaning.

[0051] A vibration plate perpendicular to the water surface is suitable for covering large, low-density algae distributions. While its energy spreads over a wider area, its penetration is less than that of a horizontal direction, making it less effective in dense or deep algae. Therefore, horizontal operation is used in areas with high algal biomass to maximize acoustic energy utilization and precisely remove algae, especially in deep and dense areas. Secondly, in water bodies with uneven algae distribution, areas with high biomass are more susceptible to issues such as dissolved oxygen, odor, and algal bloom risk than other areas. Biomass is a key indicator of cleaning efficiency and directly determines the difficulty of cleaning. Therefore, prioritizing high-biomass areas with a parallel direction can quickly reduce the overall load and curb the spread of algae. Furthermore, given limited resources, priority should be given to areas that pose a greater threat to aquatic ecosystems, rather than simply considering coverage area. Low-biomass areas have stronger self-purification capabilities. Large, low-biomass areas may gradually improve under natural conditions, while high-biomass areas, if not promptly addressed, may deteriorate further and spread to surrounding areas.

[0052] The threshold for determining algae distribution area is 1,000 square meters, determined based on various scenarios, including small lakes, ponds, medium-sized lakes, rivers, large lakes, and reservoirs. If a more refined area division or threshold adjustment is required, the area condition can be modified based on the specific scenario.

[0053] In the embodiment of the present invention, the UAV 1 issues the flight mission to the execution module through the main processing module for surface flight. The UAV 1 is equipped with a multispectral sensor, a video capture module and a light measurement module. The multispectral sensor, the video capture module and the light measurement module obtain the spectral data of the water surface, the water surface video image data and the light intensity data, and send them to the processor 6. The processor 6 obtains the area and biomass of the algae distribution, and dispatches the algae removal ship to the designated water area according to the analysis results, and selects the cluster ultrasonic vibration plate 40 of the corresponding working mode for algae removal. The cluster ultrasonic vibration plate 40 is a cubic plate structure with 30-50 ultrasonic vibrators installed inside. A single vibrator The sub-frequency is 15kHz-35kHz, with a total energy of 40-60W×30-50W=1.2-3.0kw. The vibrators are arranged in series in the vibration plate housing, and the vibrator directions are staggered from positive to negative, so that the ultrasonic energy is evenly distributed on both sides of the vibration plate. The ultrasonic control system 5 is connected to the cluster ultrasonic vibration plate 40 and the generator 7, and is used to control the working mode of the cluster ultrasonic vibration plate 40. It includes a power switch, a frequency display window, a current display window, a time display window, a high-frequency output terminal +, a high-frequency output terminal -, an alarm output terminal, a heat fan, buttons ①, ②, ③, ④, ⑤, ⑥, ⑦, ⑧, and ⑨. The power switch is used to turn the input power on or off. ON means turning on, and OFF means turning off. If the switch is in the ON position and the built-in light of the switch is on, it indicates that the input power is normal. The frequency display window displays the current working frequency, the current display window displays the current actual working current, the time display window displays the remaining time when in timing mode, and the working time counts down in seconds. If it is not in timing mode, the mode name is displayed. ON is the normally open mode, and the power is turned on when the power is turned on. The high-frequency output terminal + and the high-frequency output terminal - are connected to the cluster ultrasonic vibration plate 40 to provide high-frequency variable voltage. The alarm output terminal will be in a short-circuit state when a system failure occurs, and an error code will be sent according to different faults. The fan provides air cooling to the internal components of the ultrasonic control system 5 to ensure that the components have a stable working environment.

[0054] Button ① is the start button in time mode, button ② is the stop button in time mode, button ③ is the power reduction button, button ④ is the power increase button, button ⑤ is A mode, button ⑥ is B mode, button ⑦ is C mode, button ⑧ is the horizontal operation direction button of the cluster ultrasonic vibration plate, and button ⑨ is the vertical operation direction button of the cluster ultrasonic vibration plate.

[0055] Example 1: Evaluation of the effect of a cluster ultrasonic algal bloom inactivation device on algal cell disruption

[0056] Indoor simulations were conducted using the same ultrasonic equipment used in the field installation. The experimental equipment had a power of 1 kW to 1.5 kW and a frequency of 20 kHz to 40 kHz. Fresh algae-rich water samples were collected from a heavily polluted river channel with cyanobacteria accumulation as the treatment water samples. After the ultrasonic treatment began, samples were taken every 30 seconds for determination of intracellular chlorophyll a content to evaluate the effectiveness of the cluster ultrasonic algal bloom inactivation device on the disruption of naturally occurring algal cells.

[0057] refer to Figure 5 and Figure 6 , Figure 5 This is a diagram showing the effect of breaking algae cells using a cluster ultrasonic algae bloom inactivation device provided by an embodiment of the present invention. Figure 6 A line graph showing the change in the ratio of intracellular chlorophyll content to extracellular chlorophyll after algae cells are treated with a cluster ultrasonic algae bloom inactivation device provided in an embodiment of the present invention, as shown in FIG. Figure 5 and Figure 6 As shown in the figure, with the increase of treatment time, the proportion of extracellular chlorophyll showed an upward trend, and the concentration of intracellular chlorophyll showed a downward trend. The cell disruption efficiency was the highest in the first 0.5 min, and the cell disruption effect tended to be stable after 2.5 min of ultrasonic treatment.

[0058] Example 2: Inactivation effect of a cluster ultrasonic algae bloom inactivation device on algae

[0059] The MTT method is used to detect algal cell activity. The staining principle is that water-soluble colorless or light-colored tetrazolium compounds are reduced to water-insoluble blue-purple formazan compounds in living cells, while dead cells cannot produce formazan.

[0060] MTT was dissolved in 0.05 mol / PBS (pH 6.8) to a concentration of 0.5 mol / L. 0.1 mol / L sodium succinate was also added and stored at 0.4°C. 250 μL of water sample, after treatment with the cluster ultrasonic algal bloom inactivation device for 10 seconds, was mixed with 1000 μL of MTT stock solution. Staining was performed in a light-incubator at 35 ± 1°C for 1.5 hours. The sample was centrifuged at 8000 rpm for 3 minutes, the staining solution was removed, and the algal cells were suspended in 250 μL of distilled water. 8 μL of the sample was transferred to a hemocytometer, and the algal cell morphology was observed under a light microscope.

[0061] refer to Figure 7 , Figure 7 This is the result of MTT staining observed under an optical microscope. Figure 7 As shown, the lighter-stained areas of algae cells are dead cells. Compared to live cells, dead cells are more discrete and widely distributed, demonstrating that the device of the present invention significantly inactivates algal cell populations. The coexistence of live and dead cells can be observed in the same field of view, indicating that the inactivation effect of ultrasound is related to the duration of exposure and energy distribution.

[0062] Example 3: Experimental evaluation of the effect of destroying cyanobacteria particles (particle size > 20 μm)

[0063] refer to Figure 8 , Figure 8 The results of the change of algae particle size composition by a cluster ultrasonic algae bloom inactivation device provided by the embodiment of the present invention are as follows: during the process of treating river algae blooms with the device of the present invention, samples are taken every 30 seconds to calculate the particle size of the algae bloom particles, such as Figure 8 As shown, the particle size of algal bloom particles tends to become smaller, changing from being mainly medium-sized (100μm-250μm (56.33%)) to being mainly small-sized (20μm-100μm (80%)); the proportion of cyanobacteria particles with a large particle size (250μm) and above has dropped sharply: from 25% to 2.5%; particles larger than 500μm have basically disappeared. It appears that the device of the present invention exerts a strong physical destructive force on algal bloom particles through cavitation effect and mechanical vibration. In the early stage of treatment, ultrasonic energy is concentrated on larger algal bloom particles, causing large-sized particles to break first and decompose into medium-sized and small-sized particles. As the ultrasonic treatment time increases, the medium-sized particles are further broken down and eventually transformed into small-sized particles. In addition, the aggregation state between algal cells is destroyed, and the originally larger algal bloom clumps disintegrate into smaller particles.

[0064] Example 4: Field evaluation of the effectiveness of a cluster ultrasonic algal bloom inactivation device

[0065] refer to Figure 9 , Figure 9 This is the field work evaluation result of a cluster ultrasonic algal bloom inactivation device provided in an embodiment of the present invention. The device of the present invention was used for operation on the river site. According to the data fed back by the multispectral water quality data acquisition module 2 on the drone 1 and the results of analysis by the processor 6, it was found that the algal biomass in the water body was less than 20 mg / L. The ultrasonic control system was started, mode A was turned on, and button ⑤ was pressed. Water samples from the surface, middle and bottom of the river were collected at 0 minutes, 15 minutes, and 30 minutes respectively. After the water samples were brought back to the laboratory, 100 mL of water samples were measured and allowed to stand for about 30 minutes. The upper layer of algal water was carefully aspirated and transferred to a new container. The upper and lower layer water samples were filtered using GF / C glass cellulose membranes, and the chlorophyll a content was measured. The chlorophyll a content of the upper layer water sample was used to characterize the planktonic algal biomass in the water sample, and the chlorophyll a content of the lower layer water sample was used to characterize the bottom algal biomass in the water sample.

[0066] like Figure 9As shown, after the ultrasonic control system operated stably for more than 15 minutes, over 50% of the cyanobacteria in the river lost their ability to float; in the stable operating mode, over 30% of the cyanobacteria in the river lost their ability to float. As the operating time increased, the effect of the ultrasound gradually stabilized, and the percentage of algae losing their ability to float approached saturation. This further demonstrates that the device, through physical vibration and cavitation, disrupted the structure of the algae cells, particularly the air sacs, making it impossible for them to maintain a floating state, causing the algae to sink from the surface water to the bottom layer.

[0067] The above inventions are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A cluster ultrasonic algal bloom inactivation device, characterized in that: include: An algae removal boat (3), a clustered ultrasonic vibration plate group (4) arranged on the algae removal boat (3), and a control module electrically connected to the clustered ultrasonic vibration plate group (4); The clustered ultrasonic vibration plate group (4) comprises a plurality of clustered ultrasonic vibration plates (40), wherein the plurality of clustered ultrasonic vibration plates (40) are arranged on both sides of the hull of the algae removal boat (3), and the clustered ultrasonic vibration plates (40) are connected to the hull via a flip component so that the clustered ultrasonic vibration plates (40) can rotate relative to the water surface; The control module is used to control the flipping component to drive the cluster ultrasonic vibration plates (40) to rotate to a corresponding angle, and to control the opening / closing of each cluster ultrasonic vibration plate (40); The cluster ultrasonic vibration plate (40) comprises a shell (400) and a plurality of vibrators (401) arrayed and arranged in the shell (400), wherein the shell (400) is connected to a flip component, and the plurality of vibrators (401) are connected in series. The number of vibrators (401) in each cluster ultrasonic vibration plate (40) is 30-50, and the directions of two adjacent vibrators (401) are staggered in positive and negative directions.

2. The cluster ultrasonic algae bloom inactivation device according to claim 1, characterized in that: The material of the vibrator (401) is a ceramic chip.

3. The cluster ultrasonic algae bloom inactivation device according to claim 1, characterized in that: The frequency of the vibrator (401) is 15kHz-35kHz.

4. The cluster ultrasonic algae bloom inactivation device according to claim 1, characterized in that: The distance between two adjacent cluster ultrasonic vibration plates (40) located on the same side of the hull is 0.5m-1m.

5. The cluster ultrasonic algae bloom inactivation device according to claim 1, characterized in that: The rotation angle of the cluster ultrasonic vibration plate (40) is 90°.

6. The cluster ultrasonic algal bloom inactivation device according to claim 5, characterized in that: The turning component comprises a motor fixed on the hull of the algae removal boat (3), the output shaft of the motor is arranged horizontally, the output shaft of the motor is fixedly connected to a connecting rod (41), and the connecting rod (41) is fixedly connected to the middle part of the cluster ultrasonic vibration plate (40).

7. The cluster ultrasonic algae bloom inactivation device according to claim 1, characterized in that: The cluster ultrasonic algal bloom inactivation device further comprises a drone (1) and a multispectral water quality data acquisition module (2) carried on the drone (1), wherein the multispectral water quality data acquisition module (2) is used to acquire water surface data; The control module comprises: an ultrasonic control system (5) and a processor (6), wherein the ultrasonic control system (5) is electrically connected to the clustered ultrasonic vibration plate group (4) and the processor (6), and the processor (6) is communicatively connected to the multi-spectral water quality data acquisition module (2); The processor (6) is used to obtain the distribution area and biomass of algae based on water surface data analysis, thereby controlling the flipping component to drive the cluster ultrasonic vibration plate (40) to rotate to a corresponding angle, and triggering the ultrasonic control system (5) to start a corresponding working mode; The ultrasonic control system (5) is used to control the opening / closing of each cluster ultrasonic vibration plate (40) according to the working mode.

8. The cluster ultrasonic algal bloom inactivation device according to claim 7, characterized in that: The ultrasonic control system (5) includes three working modes. The first working mode corresponds to opening / closing the clustered ultrasonic vibration plates (40) near the bow and stern of the ship. The second working mode corresponds to opening / closing a plurality of clustered ultrasonic vibration plates (40) spaced apart on both sides of the algae removal boat (3). The third working mode corresponds to opening / closing all the clustered ultrasonic vibration plates (40).

9. The cluster ultrasonic algal bloom inactivation device according to claim 8, characterized in that: When the biomass is less than 20 mg / L, the first operating mode is selected; when the biomass is between 20 mg / L and 80 mg / L, the second operating mode is selected; and when the biomass is greater than 80 mg / L, the third operating mode is selected; When the first working mode is selected, the cluster ultrasonic vibration plate (40) is perpendicular to the water surface direction. When the second working mode or the third working mode is selected, if the algae distribution area is less than or equal to 1,000 square meters, the cluster ultrasonic vibration plate (40) is parallel to the water surface direction. If the algae distribution area is greater than 1,000 square meters, the cluster ultrasonic vibration plate (40) is perpendicular to the water surface direction. When the biomass is greater than 50 mg / L, the cluster ultrasonic vibration plate (40) first operates in the direction parallel to the water surface and then operates in the direction perpendicular to the water surface.

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