Circulating oxygenation device in aquaculture pond

Abstract

The invention discloses an aquaculture pond internal circulation oxygenation device which comprises an oxygenation module which comprises an oxygenation pump and a micro-nano bubble generator, and the output end of the oxygenation pump is directly connected to the input end of the micro-nano bubble generator to form an oxygenation unit; the circulating pipeline comprises a water inlet pipeline and a water outlet pipeline, one end of the water inlet pipeline extends to the bottom of the pond and is connected with the submersible pump, and the water outlet pipeline is arranged along the edge of the pond and is provided with a plurality of angle-adjustable water spraying heads; the control system comprises a sensor network, a central controller, an actuator and a communication module, and the sensor network comprises a plurality of dissolved oxygen sensors, a temperature sensor, a pH sensor, a chlorophyll a sensor, an ammonia nitrogen sensor and a suspended matter sensor. Compared with a traditional oxygenation mode, the gas-liquid mixing efficiency is greatly improved, the oxygenation module can generate a large number of ultra-fine bubbles, oxygen is more evenly distributed in a water body, and dissolved oxygen in all areas is sufficient.

Description

Technical Field

[0001] The invention relates to the technical field of aquaculture, and in particular to a circulating oxygenation device in an aquaculture pond. Background Art

[0002] In today's booming aquaculture industry, pond oxygenation has always been a key factor in the success or failure of aquaculture. With the development of the times, traditional aquaculture pond oxygenation technology has gradually exposed many drawbacks that are difficult to overcome.

[0003] In the early days, farmers mostly used simple surface aeration equipment, such as impeller aerators. This type of equipment simply stirs the water surface quickly to promote air contact with the water surface and increase the dissolution of oxygen. However, this method of oxygenation has obvious limitations. Its oxygenation depth is extremely limited, and it can only increase the dissolved oxygen on the surface of the water body to a certain extent. It is difficult to penetrate the water layer, resulting in the bottom of the pond and the middle and lower layers of the water body being in a state of hypoxia for a long time. This is a harsh growth environment for those fish living in the middle and lower layers of the water, such as crucian carp, carp, etc., as well as benthic organisms. It is very easy to cause diseases and even mass deaths, which seriously restricts the increase in breeding density and makes it difficult to improve the economic benefits of farmers.

[0004] With the evolution of technology, some farmers have begun to introduce ordinary aeration pumps combined with coarse bubble generators. Although there has been some improvement in the oxygenation depth compared to impeller aerators, new problems have arisen. Ordinary aeration pumps usually operate at a fixed power and cannot be flexibly adjusted according to the actual dissolved oxygen demand of the pond. They continue to operate at high power during periods of sufficient dissolved oxygen, resulting in a huge waste of energy. Moreover, the bubbles produced by the coarse bubble generator are large, and the oxygen dissolution rate is slow. Most of the bubbles escape from the water surface before they are fully dissolved, which greatly reduces the oxygenation efficiency.

[0005] At the same time, traditional aquaculture also has serious deficiencies in water quality monitoring and regulation. In most cases, farmers judge the water quality of ponds based on experience, and can only roughly observe the turbidity of the water body and the phenomenon of fish floating heads. They lack accurate and real-time understanding of key parameters such as dissolved oxygen, temperature, pH value, chlorophyll a content, ammonia nitrogen content, and suspended solids content in the water body. This makes it impossible to predict the trend of water quality deterioration in advance. When the water quality problem has seriously affected the farmed organisms, remedial measures are hastily taken, which is often too late.

[0006] In summary, traditional aquaculture pond oxygenation technology has defects in oxygenation efficiency, intelligent regulation, equipment stability and water quality monitoring, and it is difficult to meet the growing demand for efficient, precise and stable production in the modern aquaculture industry. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a circulating oxygenation device in an aquaculture pond.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] The present invention provides an aquaculture pond internal circulation oxygenation device, comprising:

[0010] The oxygenation module comprises an oxygenation pump and a micro-nano bubble generator, wherein the output end of the oxygenation pump is directly connected to the input end of the micro-nano bubble generator to form an oxygenation unit;

[0011] A circulation pipeline, including an inlet pipeline and an outlet pipeline, one end of the inlet pipeline extends to the bottom of the pond and is connected to a submersible pump, and the outlet pipeline is arranged along the edge of the pond and is equipped with a plurality of spray heads with adjustable angles;

[0012] A control system includes a sensor network, a central controller, an actuator and a communication module. The sensor network includes a plurality of dissolved oxygen sensors, temperature sensors, pH sensors, chlorophyll a sensors, ammonia nitrogen sensors and suspended matter sensors, which are respectively installed at different depths and positions of the pond. At least one sensor is set at each of the depths of 0.4 meters, 1.2 meters and 2.2 meters of the pond water body. The sensors are evenly distributed along the diameter of the pond in the horizontal direction, and the distance between adjacent sensors does not exceed 4 meters. The sensors are used to monitor the corresponding parameters of the pond water body in real time and transmit the data to the central controller. The central controller automatically adjusts the working state of the aeration pump through the actuator according to the preset threshold value and the built-in intelligent algorithm. The communication module is used to remotely transmit the real-time monitored water quality parameters and the working state of the aeration pump to the monitoring center.

[0013] As a preferred technical solution of the present invention, the oxygen pump is an adaptive variable frequency centrifugal oxygen pump;

[0014] The micro-nano bubble generator includes a bubble refinement device and a bubble dispersion device. The bubble refinement device uses a multi-stage orifice plate, the first stage aperture is 2.5-3 mm, the final stage aperture is 0.08-0.2 mm, and the distance between two adjacent orifice plates is 6-8 cm;

[0015] The bubble dispersion device adopts a venturi tube structure, the throat diameter of the venturi tube is 6-7 cm, the diffusion angle is accurately controlled between 12-14 degrees, and the distance between adjacent aeration heads is 1-2 mm.

[0016] As a preferred technical solution of the present invention, the water inlet pipe 21 adopts a double-layer nested structure, the inner layer is made of silicone material, the outer layer is made of high-strength polyethylene, and the pipe wall thickness is 2.5-3 mm. The water inlet of the submersible pump 23 is provided with a self-cleaning protective filter screen, and the filter screen aperture is 0.4-0.8 mm;

[0017] The number of the water spray heads 24 is set one for every 2-2.5 meters of the pond circumference. The diameter of the nozzle of each water spray head 23 is 3.5-4.5 cm. A guide plate is provided at the nozzle, and the angle adjustment range of the guide plate is 0-90 degrees.

[0018] As a preferred technical solution of the present invention, the control system further comprises an alarm module. When the parameters of the pond water body exceed a preset range, the alarm module emits an audible and visual alarm signal and sends an alarm message through the communication module.

[0019] As a preferred technical solution of the present invention, the communication module adopts wireless communication technology to achieve remote communication with the monitoring center, and supports remote access and control via mobile phone APP or web page.

[0020] As a preferred technical solution of the present invention, when the pond area is between 800 and 4,000 square meters, the number of the oxygenation modules is 1 to 2 sets; when the pond area is between 4,000 and 8,000 square meters, the number of the oxygenation modules is 2 to 3 sets; when the pond area is greater than 8,000 square meters, the number of the oxygenation modules is increased proportionally according to actual conditions, and the distance between two adjacent sets of oxygenation modules is not less than 60 meters to ensure uniform oxygenation in each area.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] Compared with traditional oxygenation methods, the gas-liquid mixing efficiency of the present invention is greatly improved. The oxygenation module can produce a large number of ultra-fine bubbles, so that oxygen is more evenly distributed in the water body and dissolved oxygen is sufficient in each area. The sensor network monitors multi-dimensional water quality parameters in real time. The central controller is based on artificial intelligence deep learning algorithms. According to massive data and knowledge, it can accurately analyze water quality, predict changes, and automatically generate optimal control strategies for equipment. The remote communication module supports real-time control and operation via mobile phone APP or web page, reduces labor intensity, and prevents the risk of water quality deterioration in advance. The sprinkler head is dynamically adjusted according to the pond conditions to promote water circulation and uniform distribution of dissolved oxygen, temperature, etc., reduce fish stress, create a good ecology for them, comprehensively improve aquaculture output and quality, reduce cost risks, and promote industrial modernization. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the control system structure of the present invention;

[0026] In the figure: 11, oxygen pump; 12, micro-nano bubble generator; 21, water inlet pipe; 22, water outlet pipe; 23, submersible pump; 24, sprinkler head; 31, sensor network; 32, central controller; 33, actuator; 34, communication module; 35, alarm module. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0028] Example 1

[0029] like Figure 1 As shown in FIG. 2 , the present invention provides a circulating oxygenation device in an aquaculture pond, comprising:

[0030] The oxygenation module comprises an oxygenation pump 11 and a micro-nano bubble generator 12, wherein the output end of the oxygenation pump 11 is directly connected to the input end of the micro-nano bubble generator 12 to form an oxygenation unit;

[0031] The circulation pipeline includes an inlet pipeline 21 and an outlet pipeline 22. One end of the inlet pipeline 21 extends to the bottom of the pond and is connected to a submersible pump 23. The outlet pipeline 22 is arranged along the edge of the pond and is equipped with a plurality of spray heads 24 with adjustable angles to spray water rich in micro-nano bubbles to the surface of the pond, forming a dynamic water flow circulation, promoting the exchange between the upper and lower layers of the water body, and further increasing oxygen by using the water flow rich in micro-nano bubbles released by the outlet pipeline 22;

[0032] The control system includes a sensor network 31, a central controller 32, an actuator 33 and a communication module 34. The sensor network 31 includes a plurality of dissolved oxygen sensors (using the principle of fluorescence quenching, with a measurement accuracy of ±0.05 mg / L), a temperature sensor (using a platinum resistance sensor with an accuracy of ±0.3°C), a pH sensor (using an ion selective electrode sensor with an accuracy of ±0.03 pH), a chlorophyll a sensor (using fluorescence detection technology with an accuracy of ±0.2 μg / L), an ammonia nitrogen sensor (using an ion electrode method with an accuracy of ±0.1 mg / L) and a suspended solids sensor (using a light scattering method). The sensors are based on the radiation principle and have an accuracy of ±0.3mg / L. They are installed at different depths and positions in the pond, with at least one sensor set at 0.4m, 1.2m and 2.2m depths. They are evenly distributed horizontally along the diameter of the pond, with a distance between adjacent sensors not exceeding 4m. They are used to monitor the corresponding parameters of the pond water in real time and transmit the data to the central controller 32. The central controller 32 automatically adjusts the working status of the aeration pump 11 through the actuator 33 according to the preset threshold and the built-in intelligent algorithm. The communication module 34 is used to remotely transmit the real-time monitored water quality parameters and the working status of the aeration pump 11 to the monitoring center.

[0033] Furthermore, the oxygen pump 11 is an adaptive variable frequency centrifugal oxygen pump;

[0034] The micro-nano bubble generator 12 includes a bubble refinement device and a bubble dispersion device. The bubble refinement device uses a multi-stage orifice plate, the first stage aperture is 2.5-3 mm, the final stage aperture is 0.08-0.2 mm, and the distance between adjacent two stages of orifice plates is 6-8 cm;

[0035] The bubble dispersion device adopts a Venturi tube structure. The throat diameter of the Venturi tube is 6-7 cm, the diffusion angle is precisely controlled between 12-14 degrees, and the distance between adjacent aeration heads is 1-2 mm. It can release the refined bubbles into the water body in a highly uniform and ultra-fine state.

[0036] The water body is introduced into the bubble refinement device through the water inlet pipe 21 and mixed with the gas. In the bubble refinement device, the gas and water undergo physical movements such as extremely fast rotation, cutting, and collision in the resonance cavity to achieve full mixing of gas and liquid and refinement of bubbles. The refined bubbles are transported to the micro-nano aeration head in the bubble dispersion device through a pipeline and are evenly released into the water body through the tiny holes or gaps of the aeration head. Finally, stable micro-nano bubble water is formed and transported to the water area that needs oxygenation or treatment through the water outlet pipe 22.

[0037] Furthermore, the water inlet pipe 21 adopts a double-layer nested structure, the inner layer is made of silicone material, the outer layer is made of high-strength polyethylene, the pipe wall thickness is 2.5-3 mm, and the water inlet of the submersible pump 23 is provided with a self-cleaning protective filter. The micro-rotating brush of the self-cleaning protective filter automatically cleans the debris on the surface of the filter regularly and rotates for 10 minutes every hour to effectively prevent debris from entering, ensure the normal operation of the submersible pump, and reduce the maintenance frequency. Compared with the problem of easy blockage of the traditional water inlet pipe, the maintenance cycle is extended by 2-3 times, and the filter aperture is 0.4-0.8 mm;

[0038] The outlet pipe 22 is 22-28 cm away from the bank of the pond edge;

[0039] The number of sprinkler heads 24 is set at one for every 2-2.5 meters of the circumference of the pond. The nozzle diameter of each sprinkler head 23 is 3.5-4.5 cm. A guide plate is provided at the nozzle. The guide plate has an adjustable angle range of 0-90 degrees, which can accurately control the spraying direction and intensity, spraying water rich in micro-nano bubbles to the surface of the pond, forming a dynamic water flow circulation and promoting the exchange of upper and lower layers of the water.

[0040] Furthermore, the control system also includes an alarm module 35. When parameters such as dissolved oxygen, temperature, pH value, chlorophyll a content, ammonia nitrogen content, and suspended matter content of the pond water exceed a preset range, the alarm module 35 sends out an audible and visual alarm signal and sends an alarm message through the communication module 44. The alarm threshold can be flexibly set by the central controller 32 according to factors such as the breeding species, season, and growth stage. The adjustable range of the dissolved oxygen alarm threshold is 4-7 mg / L, and the adjustable range of the temperature alarm threshold is 18-32°C.

[0041] Furthermore, the communication module 34 adopts wireless communication technologies such as 4G / 5G, Wi-Fi or LoRa to achieve remote communication with the monitoring center, and also supports remote access and control via mobile phone APP or web page.

[0042] Furthermore, when the pond area is between 800 and 4,000 square meters, the number of oxygenation modules is 1 to 2 sets; when the pond area is between 4,000 and 8,000 square meters, the number of oxygenation modules is 2 to 3 sets; when the pond area is greater than 8,000 square meters, the number of oxygenation modules is increased proportionally according to actual conditions, and the distance between two adjacent sets of oxygenation modules is not less than 60 meters to ensure uniform oxygenation in each area.

[0043] Specifically, the oxygenation module, the circulation pipeline and the control system are assembled in sequence according to the shape of the pond.

[0044] The intelligent algorithm adopted by the central controller 32 is an adaptive control algorithm based on artificial intelligence deep learning, and its working principle is as follows:

[0045] First, the multi-dimensional water quality data transmitted in real time by the sensor network 31 are collected, including dissolved oxygen, temperature, pH value, chlorophyll a content, ammonia nitrogen content, suspended solids content, etc.; then, these data are input into the pre-trained deep learning model. The model quickly analyzes and judges the current water quality status based on massive historical data and aquaculture knowledge, and predicts the future trend of water quality changes; finally, based on the prediction results, the optimal control strategy of the aeration pump 11, the sprinkler head 23 and other equipment is automatically generated, such as adjusting the speed of the aeration pump 11, adjusting the angle and flow rate of the sprinkler head 23, etc., and the central controller 32 can continuously optimize the model parameters according to real-time feedback. In the initial state, the accuracy of the model is not less than 80%. As the system runs, the model is optimized and adjusted every 0.5 hours to increase the accuracy by at least 5%, so as to achieve precise oxygenation control and dynamic management of water quality.

[0046] The operation process of the device is as follows: the sensor network 31 collects multi-dimensional water quality data such as dissolved oxygen, temperature, pH value, chlorophyll a content, ammonia nitrogen content, and suspended solids content of the pond water in real time. For example, in the high temperature of summer, the dissolved oxygen sensor can quickly capture the downward trend of dissolved oxygen in the water body and transmit the latest data to the central controller 32 every 5 seconds. The central controller 32 uses an adaptive control algorithm based on artificial intelligence deep learning to input the data into a pre-trained deep learning model. The model quickly analyzes and judges the current water quality based on massive historical data and aquaculture knowledge, such as judging that the dissolved oxygen is about to fall below the suitable range for farmed fish.

[0047] When water quality parameters exceed the preset range, such as the dissolved oxygen alarm threshold (which can be flexibly set at 4-7 mg / L according to factors such as the breeding species, season, and growth stage), the central controller 32 immediately controls the alarm module 35 to send out an audible and visual alarm signal. The power of the audible and visual alarm is 6-8W, and the sound decibel can reach 85-95dB. At the same time, an alarm message is sent to the farmer's mobile phone APP and the monitoring center through the communication module 34 to inform the farmer of the insufficient dissolved oxygen and remind the farmer to pay attention.

[0048] The central controller 32 automatically generates the optimal control strategy for the aeration pump 11, the sprinkler head 23 and other equipment according to the prediction results of the deep learning model. If it is judged that the dissolved oxygen is insufficient, the speed of the aeration pump 11 is immediately adjusted to increase. Since the aeration pump is an adaptive variable frequency centrifugal type, it can efficiently increase the oxygen supply. Compared with the traditional fixed power aeration pump, it saves more than 20% energy and increases the oxygenation efficiency by more than 30%. At the same time, adjust the angle and flow rate of the sprinkler head 23, and accurately adjust the direction of the nozzle to the area with low dissolved oxygen, such as adjusting the angle of some sprinkler heads from 45 degrees to 70 degrees, increase the water disturbance in the area, promote the exchange of upper and lower water bodies, and accelerate the dissolution and diffusion of oxygen. When the micro-nano bubble generator 12 is running, it produces a large number of ultra-fine bubbles with a diameter of 0.03-0.2 microns. These bubbles rise very slowly and suspend in the water for a long time, greatly improving the oxygen dissolution efficiency. Provide sufficient and uniform oxygen for the pond water.

[0049] The submersible pump 23 is started to extract water with low dissolved oxygen from the bottom of the pond through the water inlet pipe 21. After the extracted water enters the oxygenation module for oxygenation, it is sprayed to the surface of the pond through the water outlet pipe 22 by the water spray head 24, forming a dynamic water flow cycle, promoting the exchange of the upper and lower layers of the water body, and enhancing the uniformity of dissolved oxygen in the overall water body. The water spray head 24, which can intelligently adjust the angle and flow rate, can dynamically adjust the spraying direction and intensity according to the real-time changes of the pond water flow, wind direction, etc., to ensure a stable circulation effect and create a good water environment for fish growth.

[0050] It can be seen that during the operation of the entire device, the various components work together to continuously optimize the pond water environment. The outlet pipe 22 continues to spray the oxygenated water evenly to enhance the water circulation effect, so that the distribution of dissolved oxygen, temperature, nutrients, etc. in different areas of the pond tends to be balanced, reducing the stress response of fish caused by water quality differences. At the same time, the sensor network 31 in the control system continuously monitors. Once abnormal fluctuations in water quality parameters are found, the central controller 32 can adjust oxygenation, water change and other strategies in a timely manner to ensure that the pond water quality is always suitable for breeding.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A circulating oxygenation device in an aquaculture pond, characterized in that: include: An oxygenation module comprises an oxygenation pump (11) and a micro-nano bubble generator (12), wherein the output end of the oxygenation pump (11) is directly connected to the input end of the micro-nano bubble generator (12) to form an oxygenation unit; A circulation pipeline, comprising an inlet pipeline (21) and an outlet pipeline (22), wherein one end of the inlet pipeline (21) extends to the bottom of the pond and is connected to a submersible pump (23), and the outlet pipeline (22) is arranged along the edge of the pond and is equipped with a plurality of spray heads (24) with adjustable angles; A control system comprises a sensor network (31), a central controller (32), an actuator (33) and a communication module (34). The sensor network (31) comprises a plurality of dissolved oxygen sensors, temperature sensors, pH sensors, chlorophyll a sensors, ammonia nitrogen sensors and suspended solids sensors, which are respectively installed at different depths and positions of a pond. At least one sensor is arranged at each of the depths of 0.4 m, 1.2 m and 2.2 m of the pond water body. The sensors are evenly distributed along the diameter of the pond in the horizontal direction, and the distance between adjacent sensors does not exceed 4 m. The sensors are used to monitor the corresponding parameters of the pond water body in real time and transmit the data to the central controller (32). The central controller (32) automatically adjusts the working state of the aeration pump (11) through the actuator (33) according to a preset threshold value and a built-in intelligent algorithm. The communication module (34) is used to remotely transmit the water quality parameters and the working state of the aeration pump (11) monitored in real time to a monitoring center.

2. The aquaculture pond internal circulation oxygenation device according to claim 1, characterized in that: The oxygen pump (11) is an adaptive variable frequency centrifugal oxygen pump; The micro-nano bubble generator (12) comprises a bubble refinement device and a bubble dispersion device, wherein the bubble refinement device adopts a multi-stage orifice plate, the first stage orifice diameter is 2.5-3 mm, the final stage orifice diameter is 0.08-0.2 mm, and the distance between two adjacent orifice plates is 6-8 cm; The bubble dispersion device adopts a venturi tube structure, the throat diameter of the venturi tube is 6-7 cm, the diffusion angle is accurately controlled between 12-14 degrees, and the distance between adjacent aeration heads is 1-2 mm.

3. The aquaculture pond internal circulation oxygenation device according to claim 1, characterized in that: The water inlet pipe (21) adopts a double-layer nested structure, the inner layer is made of silica gel, the outer layer is made of high-strength polyethylene, and the pipe wall thickness is 2.5-3 mm. The water inlet of the submersible pump (23) is provided with a self-cleaning protective filter screen, and the filter screen aperture is 0.4-0.8 mm; The number of the water spray heads (24) is set at one for every 2-2.5 meters of the pond circumference. The diameter of the nozzle of each water spray head (23) is 3.5-4.5 centimeters. A guide plate is provided at the nozzle. The angle adjustment range of the guide plate is 0-90 degrees.

4. The aquaculture pond internal circulation oxygenation device according to claim 1, characterized in that: The control system further comprises an alarm module (35). When the parameters of the pond water body exceed a preset range, the alarm module (35) emits an audible and visual alarm signal and sends an alarm message via a communication module (44).

5. The aquaculture pond internal circulation oxygenation device according to claim 1, characterized in that: The communication module (34) uses wireless communication technology to achieve remote communication with the monitoring center, and supports remote access and control via a mobile phone APP or a web page.

6. The aquaculture pond internal circulation oxygenation device according to any one of claims 1 to 5, characterized in that: When the pond area is between 800 and 4,000 square meters, the number of oxygenation modules is 1 to 2 sets; when the pond area is between 4,000 and 8,000 square meters, the number of oxygenation modules is 2 to 3 sets; when the pond area is greater than 8,000 square meters, the number of oxygenation modules is increased proportionally according to actual conditions, and the distance between two adjacent sets of oxygenation modules is not less than 60 meters to ensure uniform oxygenation in each area.

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