Cluster ultrasonic algae bloom inactivation device

Abstract

The invention provides a cluster ultrasonic algae bloom inactivation device which comprises an algae removal ship, a cluster type ultrasonic vibration plate group arranged on the algae removal ship and a control module electrically connected with the cluster type ultrasonic vibration plate group, and the cluster type ultrasonic vibration plate group comprises a plurality of cluster ultrasonic vibration plates. The multiple cluster ultrasonic vibration plates are arranged on the two sides of a ship body of the algae removal ship, the cluster ultrasonic vibration plates are connected with the ship body through overturning parts so that the cluster ultrasonic vibration plates can rotate relative to the water surface, and the control module controls the overturning parts to drive the cluster ultrasonic vibration plates to rotate by corresponding angles according to the algae distribution area and biomass. And the opening / closing of each cluster ultrasonic vibration plate is controlled, so that large-area and rapid inactivation of algae substances can be achieved, the algae substances lose buoyancy and photosynthetic activity, and then the algae substances die and sink to the water bottom.

Description

Technical Field

[0001] The 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 caused excessive 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, will absorb these high-nutrient substances. As the degree of eutrophication of lakes, rivers and other water bodies deepens, these types of autotrophic organisms will 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 stench, 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 the growth of algae, 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 the bubbles and organelles in the cell medium to rupture and damage, thereby achieving the purpose of low-power ultrasonic control and killing of blue-green algae.

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

[0005] In order to solve the above technical problems, the present invention provides a cluster ultrasonic algal bloom inactivation device, which can achieve 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.

[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 comprises 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 flipping component so that the cluster ultrasonic vibration plates can rotate relative to the water surface, and the control module controls the flipping component to drive the cluster ultrasonic vibration plates to rotate to a corresponding angle according to the distribution area and biomass of the algae, 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 flat in the shell, the shell is connected to the flip component, 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 horizontally arranged, 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 algal 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 distribution area and biomass of algae 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 a corresponding working mode, 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 prior art:

[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, so as to adjust 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, eliminate the areas that are difficult to cover with a traditional single beam, and at the same time, the angle of the cluster ultrasonic vibration plate is adjusted by the flipping component to cooperate with 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 be close to the water surface. The sound waves will remove algae in the vertical direction, and the cluster ultrasonic vibration plate will be adjusted to be perpendicular to the water surface, and the sound waves will remove algae in the horizontal direction. The movement of the hull can adjust the path in real time in combination with the fluidity of the water body and the distribution of algae, change the range of action of the ultrasonic wave, and be more targeted. The mobile operation mode can optimize resource utilization, avoid repeated action on the same location, reduce energy consumption, improve the efficiency of ultrasonic use and algae control, and reasonably use 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 multi-beam, 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, so that the operation surface is freer, 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 algae bloom inactivation device provided by an embodiment of the present invention;

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

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

[0021] Figure 4 An internal structure diagram 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 by a cluster ultrasonic algae bloom inactivation device provided in 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 result of the change of algae particle size composition by a cluster ultrasonic algae bloom inactivation device provided in an embodiment of the present invention;

[0026] Fig. 9 This is a field 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. Multi-spectral water quality data acquisition module; 3. Algae removal boat; 4. Cluster ultrasonic vibration plate group; 40. Cluster ultrasonic vibration plate; 400. Shell; 401. Vibrator; 5. Ultrasonic control system; 6. Processor; 7. Generator. DETAILED DESCRIPTION

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

[0030] In the description of the present invention, it is to 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”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] Compared with the in-situ treatment of algae blooms in relatively static lakes, the water flow in rivers is fast and the residence time of algae is short, so the in-situ treatment of river-imported algae blooms is very difficult. Ultrasonic algae removal technology is the main technology for the treatment of algae blooms in lakes. The principle of algae removal is to use the mechanical energy, cavitation and thermal effect of ultrasound to make algae cells pulsate, thereby causing the bubbles and organelles in the cell medium to rupture and damage, so as to achieve the purpose of low-power ultrasonic control and killing of cyanobacteria. At the same time, under the action of ultrasound, a large number of reactive oxygen (ROS) molecules such as superoxide ions, hydroxyl ions and hydrogen peroxide are produced in algae cells. The increase in the level of reactive oxygen will lead to lipid peroxidation of algae cell membranes, protein denaturation and nucleic acid mutation in the water body, further inhibiting the photosynthesis of algae and causing the algae to be unable to continue to proliferate. However, the traditional ultrasonic algae inactivation device only roughly inactivates the algae in the water body, and the distribution of algae in the polluted water body is often diverse. Therefore, the traditional ultrasonic algae inactivation device cannot completely kill the algae in the polluted water body, making the algae bloom treatment inefficient.

[0032] To this end, an embodiment of the present invention provides a cluster ultrasonic algal bloom inactivation device, which can achieve 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.

[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 flipping component so that the cluster ultrasonic vibration plates can rotate relative to the water surface, the control module controls the flipping component to drive the cluster ultrasonic vibration plates to rotate to a corresponding angle according to the distribution area and biomass of the algae, 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 several specific embodiments. In order to keep the following description of the embodiments of the present invention clear and concise, the detailed description of known functions and known components may be omitted. When any component of the embodiments of the present invention appears in more than one accompanying drawings, the component may be represented by the same reference numeral in each of the accompanying drawings.

[0036] refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 A front view of a cluster ultrasonic algae bloom inactivation device provided in an embodiment of the present invention, Figure 2 A top view of a cluster ultrasonic algae 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, such as 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 flipping component so that the cluster ultrasonic vibration plates 40 can rotate relative to the water surface, and the control module controls the flipping component to drive the cluster ultrasonic vibration plates 40 to rotate to a corresponding angle according to the distribution area and biomass of the algae, 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, so as to adjust 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, eliminate the areas that are difficult to cover with a traditional single beam, and at the same time, the angle of the cluster ultrasonic vibration plate is adjusted by the flipping component to cooperate with 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 be close to the water surface. The sound waves will remove algae in the vertical direction, and the cluster ultrasonic vibration plate will be adjusted to be perpendicular to the water surface, and the sound waves will remove algae in the horizontal direction. The movement of the hull can adjust the path in real time in combination with the fluidity of the water body and the distribution of algae, change the range of action of the ultrasonic wave, and be more targeted. The mobile operation mode can optimize resource utilization, avoid repeated action on the same location, reduce energy consumption, improve the efficiency of ultrasonic use and algae control, and reasonably use 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 multi-beam, 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, so that the operation surface is freer, making the ultrasonic energy more concentrated, which can significantly improve the efficiency of algae removal.

[0038] Specifically, multiple cluster ultrasonic vibration plates 40 are symmetrically arranged on both sides of the hull of the algae removal boat 3. The symmetrical arrangement of the cluster ultrasonic vibration plates 40 can prevent the installation and operation of the cluster ultrasonic vibration plates 40 from causing weight imbalance or power deviation of the hull, affecting the stability and operability of the hull, and can also ensure that the ultrasonic sound field on both sides is evenly distributed, avoiding low algae removal efficiency or uneven operation on one side, and at the same time, relative ultrasonic vibrations can offset each other, reducing mechanical vibrations on the hull structure. The distribution on both sides of the hull is the main area of ​​action of water fluidity and hull intervention on algae. Concentrating the cluster ultrasonic vibration plates 40 on both sides can maximize the removal efficiency. Due to the limitation of physical installation, the front and rear positions may involve the installation area of ​​the hull tip or propulsion equipment, which are usually not suitable for installing cluster ultrasonic vibration plates 40. In addition, when the cluster ultrasonic vibration plates 40 are working, overlapping sound fields will be generated. Installation on all four sides may cause interference or cancellation between sound fields, which will reduce efficiency and increase 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, and 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 in the shell 400, the shell 400 is connected to the flip component, the plurality of vibrators 401 are connected in series, the number of vibrators 401 of each cluster ultrasonic vibration plate 40 is 30-50, the directions of two adjacent vibrators 401 are staggered, and the plurality of vibrators 401 are arrayed in the shell 400, which can make the sound field distribution of the ultrasonic wave more uniform and cover a larger range, avoid the decrease of algaecide efficiency or local over-focusing due to uneven sound field, and reduce interference and attenuation at the same time. 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 also more convenient for maintenance. Compared with the multi-layer arrangement, the single-layer arrangement has lower design and production costs and a more compact structure. The number of 30-50 vibrators 401 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 strike 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 removal 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 removal effects while maintaining the portability and economy of the device. The multiple vibrators 401 in the embodiment of the present invention are not a completely conventional design. The significance includes: 1. The design of phase optimization and staggered positive and negative vibrators makes the phase difference of 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 sound waves higher, which is beneficial to the inactivation of algal blooms; 3. The circuit is simplified. 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 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 it 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, staggered vibrators can emit ultrasonic waves in different directions, making the sound field distribution more uniform; 2. Reduced mutual interference, staggered ultrasonic beams reduce the wave superposition or interference phenomenon 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, 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-level diameter after being abraded. Therefore, the sintered piezoelectric ceramic chip has more rhombus structure cells than irregular trapezoidal structure cells. Since the rhombus structure cells have 90° and 180° electric domains, the electric domains inside the irregular trapezoidal structure cells are disordered. Therefore, the piezoelectric coefficient value of the piezoelectric ceramic is higher than that of 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, so that the cluster ultrasonic vibration plate 40 can maintain a good load bandwidth width.

[0043] Specifically, the frequency of a single vibrator 401 is 15kHz-35kHz, the frequency of a single vibrator is 15kHz-35kHz, and the total energy is 40-60W×30-50W=1.2-3.0kw. The frequency is in this range for the following reasons: 1. The 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, which can easily form a strong cavitation effect in water. Low-frequency ultrasonic cavitation has high intensity, and bubbles release a high-temperature and high-pressure microenvironment when they burst, which can effectively destroy the cell walls and cell membranes of algae. If the frequency is too high, the cavitation effect will be weakened, which may lead to poor inactivation effect. 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 farther, which is conducive to covering wider and deeper algae killing areas; 3. From the perspective of biosafety, this frequency has relatively little impact on fish and other non-target organisms.

[0044] Specifically, the distance between two adjacent cluster ultrasonic vibration plates 40 on the same side of the hull is 0.5m-1m. The propagation range of ultrasonic waves in water is limited. If the distance between adjacent cluster ultrasonic vibration plates 40 is too large, an ultrasonic gap area will be formed between the two adjacent cluster ultrasonic vibration plates 40, 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, thereby reducing the inactivation effect. Controlling within the range of 0.5m-1m can ensure that the ultrasonic waves form a sufficient coverage bandwidth on both sides of the hull, ensuring that each cluster ultrasonic vibration plate 40 can work independently and efficiently, and effectively inactivate 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 operating 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, 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, one motor is preferably set.

[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 according to the water surface data analysis, thereby controlling the flipping component to drive the cluster ultrasonic vibration plate 40 to rotate the 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 of the water surface, thereby collecting spectral data, the video capture module is used to capture water surface video image data, and 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 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 in the figure, 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 purpose of designing three algae removal modules is to adjust the number and distribution spacing of the cluster ultrasonic vibration plates 40 according to the degree of pollution in the water area, improve the use efficiency of ultrasonic waves and the efficiency of algae control, and also greatly save energy consumption.

[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-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] The vibration plate is perpendicular to the water surface and is suitable for low-density algae distribution scenarios with a large coverage area. Its energy diffusion range is wide, but its penetration is not as good as the horizontal direction, and it may not be able to effectively act on dense or deep algae. Therefore, the use of horizontal operation in high algae biomass areas is to maximize the utilization of sound wave energy and accurately clean algae, especially in deep and high-density areas. Secondly, in water bodies with uneven algae distribution, high biomass areas have more serious problems such as dissolved oxygen, odor, and algal bloom risks than other areas. Biomass becomes the core indicator of cleaning efficiency and directly determines the difficulty of cleaning. Therefore, using parallel directions to prioritize high biomass areas can quickly reduce the total load and curb the spread of algae. At the same time, when resources are limited, priority should be given to areas that are more harmful to water ecology, rather than simply considering the coverage area. Low biomass areas have strong self-purification capabilities, and large low biomass areas may gradually improve under natural conditions, while high biomass areas may further deteriorate and spread to the surrounding areas if not treated in time.

[0052] 1,000 square meters is used as the threshold for determining the distribution area of ​​algae, which is determined based on multiple scenarios such as small lakes, ponds, medium-sized lakes, rivers, large lakes, reservoirs, etc. If the actual situation requires a more detailed area division or adjustment of the threshold, the area condition can be modified according to 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 multi-spectral sensor, a video capture module and a light measurement module. The spectral data, the water surface video image data and the light intensity data of the water surface are obtained through the multi-spectral sensor, the video capture module and the light measurement module, and sent to the processor 6. The processor 6 obtains the area and biomass of algae distribution, dispatches the algae removal ship to the designated waters 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 Sub-frequency: 15kHz-35kHz, total energy is 40-60W×30-50W=1.2-3.0kw, the vibrators are arranged in series in the vibration plate box, and the vibrator directions are arranged in a staggered manner 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, which 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 fan, a button ①, a button ②, a button ③, a button ④, a button ⑤, a button ⑥, a button ⑦, a button ⑧, and a button ⑨. The power switch is used to turn on or off the input power, ON means turning on, 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, the working time counts down in seconds, and the mode name is displayed when it is not in timing mode. ON is the normally open mode, and the machine is turned on when powered 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 error codes will be sent according to different failures. 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 the disruption of algal cells

[0056] The same type of ultrasonic equipment as the equipment installed on site was used for indoor simulation. The power of the experimental equipment was 1kw-1.5kw and the frequency was 20kHZ-40kHZ. Fresh algae-rich water samples from the cyanobacteria accumulation area of ​​the river with more serious pollution were collected as the water samples to be treated. After the ultrasonic treatment started, samples were taken every 30s, and the samples were used to determine the intracellular chlorophyll a content to evaluate the effect of the cluster ultrasonic algae bloom inactivation device on the fragmentation of algae cells in the natural state.

[0057] refer to Figure 5 and Figure 6 , Figure 5 This is a diagram showing the effect of breaking algae cells in a cluster ultrasonic algae bloom inactivation device provided in 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, such as Figure 5 and Figure 6 As shown in the figure, with the increase of treatment time, the proportion of extracellular chlorophyll increased, the concentration of intracellular chlorophyll decreased, and 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 ultrasound.

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

[0059] The MTT method is used to detect the activity of algae cells. The staining principle is that water-soluble colorless or light-colored tetrazole 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, and 0.1 mol / L sodium succinate was added and stored at 0.4°C. 250 μL of water sample treated with the cluster ultrasonic algae bloom inactivation device for 10 seconds was measured and mixed with 1000 μL of MTT stock solution. The staining was carried out in a light incubator at 35±1°C. After staining for 1.5 hours, the sample was centrifuged at 8000 rpm for 3 minutes, the staining solution was removed, and the algae cells were suspended in 250 μL of distilled water. 8 μL was taken in a hemocytometer and the algae cell morphology was observed under an optical 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 with living cells, dead cells are in a discrete state and are widely distributed, which shows that the device of the present invention has a significant inactivation effect on algae cell groups. In the same field of view, the coexistence of living cells and dead cells can be observed, indicating that the inactivation effect of ultrasound is related to the action time and energy distribution.

[0062] Example 3: Experimental evaluation of the effect of destroying the colony of blue algae 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 in an 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 count the particle sizes of algae bloom particles, such as Figure 8 As shown, the particle size of algal bloom particles tends to become smaller, changing from medium-sized particles (100μm-250μm (56.33%)) to small-sized particles (20μm-100μm (80%)); the proportion of blue-green algae particles with large particle sizes (250μm) or larger has dropped sharply: from 25% to 2.5%; particles larger than 500μm have basically disappeared. The surface of the device of the present invention exerts a strong physical destructive force on the algal bloom particles through the cavitation effect and mechanical vibration. In the early stage of treatment, the ultrasonic energy is concentrated on the larger algal bloom particles, causing the 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 and eventually transformed into small-sized particles. In addition, the aggregation state between the algal cells is destroyed, and the originally larger algal bloom clumps disintegrate into smaller particles.

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

[0065] refer to Fig. 9 , Fig. 9 The present invention provides a cluster ultrasonic algae bloom inactivation device for an embodiment of the present invention. The device of the present invention is 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 result of the analysis by the processor 6, it is known that the algae biomass in the water body is less than 20 mg / L. The ultrasonic control system is started, the A mode is turned on, and the button ⑤ is pressed to collect surface, middle and bottom water samples of the river at 0 min, 15 min and 30 min respectively. After the water samples are brought back to the laboratory, 100 mL of the water samples are measured and allowed to stand for about 30 min. The upper algae water is carefully transferred to a new container. The upper and lower water samples are respectively filtered using a GF / C glass cellulose membrane to determine the chlorophyll a content. The chlorophyll a content of the upper water sample is used to characterize the planktonic algae biomass in the water sample, and the chlorophyll a content of the lower water sample is used to characterize the bottom algae biomass in the water sample.

[0066] like Fig. 9As shown, when the ultrasonic control system runs stably for more than 15 minutes, more than 50% of the blue algae in the river lose their ability to float; in the stable operation mode, more than 30% of the blue algae in the river lose their ability to float. As the running time increases, the effect of the ultrasound gradually stabilizes, and the proportion of algae that lose their ability to float tends to saturation. This further shows that the device of the present invention destroys the structure of the algae cells, especially the air sac structure, through physical vibration and cavitation effects, making it impossible for them to maintain a floating state, causing the algae to sink from the surface water to the bottom.

[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 protection scope of the present invention.

Claims

1. A cluster ultrasonic algae 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 flipping 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).

2. The cluster ultrasonic algae bloom inactivation device according to claim 1, characterized in that: The clustered ultrasonic vibration plate (40) comprises a shell (400) and a plurality of vibrators (401) arranged in an array and arranged in parallel in the shell (400); the shell (400) is connected to a flip component; the plurality of vibrators (401) are connected in series; the number of vibrators (401) in each clustered ultrasonic vibration plate (40) is 30-50, and the directions of two adjacent vibrators (401) are staggered in positive and negative directions.

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

4. The cluster ultrasonic algae bloom inactivation device as claimed in claim 2, characterized in that: The frequency of the vibrator (401) is 15kHz-35kHz.

5. The cluster ultrasonic algae bloom inactivation device as claimed in 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.

6. The cluster ultrasonic algae bloom inactivation device as claimed in claim 1, characterized in that: The rotation angle of the clustered ultrasonic vibration plate (40) is 90°.

7. The cluster ultrasonic algae bloom inactivation device as claimed in claim 6, 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).

8. The cluster ultrasonic algae bloom inactivation device as claimed in claim 1, characterized in that: The cluster ultrasonic algal bloom inactivation device further comprises an unmanned aerial vehicle (1) and a multi-spectral water quality data acquisition module (2) mounted on the unmanned aerial vehicle (1), wherein the multi-spectral 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 according to the 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.

9. The cluster ultrasonic algae bloom inactivation device as claimed in claim 8, 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, 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), and the third working mode corresponds to opening / closing all the clustered ultrasonic vibration plates (40).

10. The cluster ultrasonic algae bloom inactivation device according to claim 9, characterized in that: 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, the cluster ultrasonic vibration plate (40) first operates parallel to the water surface and then operates perpendicular to the water surface.

Images