Water circulation purification and water-saving irrigation integrated equipment suitable for microalgae cultivation and operation method

Abstract

The present application relates to the technical field of microalgae cultivation, in particular to a water circulation purification and water-saving irrigation integrated equipment suitable for microalgae cultivation and an operation method thereof, comprising a cultivation pond, a partition wall is arranged in the middle of the cultivation pond, a push flow assembly is arranged on the outer wall of the partition wall, and a driving assembly is arranged in the partition wall; the push flow assembly comprises a mounting plate connected with the driving assembly, a push flow plate mounted on the mounting plate, a plurality of aeration heads staggered arranged on the bottom of the side wall of the mounting plate, and a plurality of groups of spoiler plates regularly arranged on the inner side wall of the cultivation pond. According to the technical scheme, the tail water is pushed to flow by the movement of the push flow plate driven by the driving assembly, a plurality of push flow devices are not needed to be arranged, the cost is reduced, the aeration heads are synchronously moved to change the position, the uniformity of the input carbon dioxide is improved, the local carbon dioxide concentration is prevented from being too high to cause the death of microalgae, the surface of the aeration head can be cleaned at the same time of aeration to prevent blockage.

Description

Technical Field

[0001] This invention belongs to the field of microalgae cultivation technology, specifically an integrated water circulation purification and water-saving irrigation device and its operation method suitable for microalgae cultivation. Background Technology

[0002] Microalgae cultivation is generally carried out in two ways: open raceway cultivation or closed pipe cultivation. In open raceway cultivation, because microalgae can absorb carbon dioxide and nitrogen and potassium, it is usually combined with agricultural or industrial wastewater treatment to achieve a closed-loop system of "cultivation-purification-reuse".

[0003] For example, patent application CN119776107A relates to the field of microalgae cultivation technology, and in particular to a high-efficiency microalgae cultivation device for a recirculating water system, including an electrocatalytic reactor for treating harmful substances in aquaculture wastewater, and an aquaculture raceway pool for expanding microalgae cultivation. A biological treatment unit for preliminary microalgae cultivation is provided on one side of the electrocatalytic reactor. The biological treatment unit includes a first bioreactor, a second bioreactor, and a third bioreactor arranged in sequence. The cross-section of the first bioreactor is set as a cone and is made of plastic.

[0004] Based on the above cases and actual situations, we have identified the following problems: When treating wastewater from microalgae cultivation, fixed flow promoters are typically used to propel the wastewater and microalgae. For large racetrack ponds, multiple flow promoters are required. In addition, during cultivation, aeration points are usually fixed, which can easily lead to excessively high local carbon dioxide concentrations, causing microalgae death and affecting cultivation. Furthermore, with fixed aeration points, microalgae can easily adhere to the surface of the aeration device, causing blockages and preventing aeration for extended periods. This not only affects microalgae cultivation but also poses a safety hazard. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated water circulation purification and water-saving irrigation device and operation method suitable for microalgae cultivation. It innovatively integrates aeration heads and propulsion plates together, drives the propulsion plates to move and promote the flow of tailwater, eliminating the need for multiple propulsion devices, reducing costs. At the same time, the aeration heads move synchronously to change position, improving the uniformity of carbon dioxide introduced. During aeration, the surface of the aeration heads can also be cleaned to prevent clogging, thus solving the above-mentioned problems of the prior art.

[0006] To achieve the above objectives, the present invention provides an integrated water circulation purification and water-saving irrigation device suitable for microalgae cultivation, including a racetrack-shaped cultivation pond, a proportionally scaled-down partition wall in the middle of the cultivation pond, a flow propulsion component for promoting the flow of liquid in the cultivation pond on the outer wall of the partition wall, and a drive component for driving the flow propulsion component to move along the outer wall of the partition wall inside the partition wall.

[0007] The propulsion assembly includes a mounting plate connected to the drive assembly, a propulsion plate mounted on the mounting plate, several aeration heads staggered at the bottom of the side wall of the mounting plate, and several sets of baffles regularly arranged on the inner side wall of the aquaculture tank. The surface of the propulsion plate is perpendicular to the water flow direction in the aquaculture tank. A horizontal second connecting pipe is provided at the bottom of the mounting plate. The second connecting pipe is rotatably connected to the mounting plate. Several air holes corresponding to the positions of the aeration heads are provided on the wall of the second connecting pipe. A connector is fixedly connected to the left end of the second connecting pipe. Several outward plates are vertically provided on the outer wall of the connector. Several baffles are regularly distributed in a racetrack pattern at the bottom of the aquaculture tank.

[0008] In this design, considering that fixed flow promoters are typically used to move the wastewater and algae during microalgae cultivation, large raceway tanks require multiple flow promoters. Furthermore, the fixed aeration points during cultivation can easily lead to excessively high local carbon dioxide concentrations, causing algae death and impacting cultivation. Additionally, fixed aeration points allow algae to easily adhere to the aeration device surface, causing blockages and prolonged periods without aeration, which not only affects algae cultivation but also poses a safety hazard. Therefore, this technical solution integrates the aeration head and the flow promoter. The flow promoter moves to move the wastewater, eliminating the need for multiple flow promoters and reducing costs. Simultaneously, the aeration head moves synchronously to change position, improving the uniformity of carbon dioxide injection and preventing excessively high local carbon dioxide concentrations that could kill algae. The solution also cleans the aeration head surface during aeration to prevent blockages.

[0009] In the technical solution of the present invention, the straight section and the arc section of the outer wall of the partition wall are respectively fixed with a first outward protrusion and a second outward protrusion. The first outward protrusion is located above the second outward protrusion. The mounting plate is L-shaped in general. The upper part and the lower part of the inner side of the vertical section of the mounting plate are respectively provided with a first slot and a second slot. The first outward protrusion is slidably connected with the first slot, and the second outward protrusion is slidably connected with the second slot.

[0010] In this configuration, by setting the first and second outward protrusions, the mounting plate becomes more stable as it moves with the drive assembly, preventing the water resistance on the mounting plate from being directly transmitted to the drive assembly and affecting its operation.

[0011] In the technical solution of the present invention, the drive assembly includes a servo motor, two rotating wheels, and a track sleeved between the two rotating wheels. The bottom of the servo motor is fixedly connected to the inner bottom surface of the partition wall, the output shaft of the servo motor is coaxially fixedly connected to the front rotating wheel, and the top of the vertical section of the mounting plate is fixedly connected to the outer surface of the track.

[0012] In this setup, by configuring the drive component, when in use, the servo motor is activated to drive the front wheel to rotate, which in turn causes the track to rotate, thereby moving the mounting plate along the outer wall of the partition wall.

[0013] In the technical solution of the present invention, an air pump is fixed in the middle of the bottom surface of the partition wall, and an air supply pipe is connected to the air outlet end of the air pump. A first connecting pipe is provided in the vertical section of the mounting plate, and the bottom end of the first connecting pipe is connected to the left end of the connector and the two are rotatably connected.

[0014] In this setup, an air pump is used to deliver carbon dioxide from the air supply pipe into the aeration head for aeration when carbon dioxide is introduced.

[0015] In the technical solution of the present invention, the vertical section of the mounting plate is provided with a dial plate groove near the bottom, the size of the dial plate groove is larger than the size of the dial plate, and the extension plate extends out of the dial plate groove.

[0016] In this configuration, a dial plate groove is provided so that the dial plate can contact the extension plate, thereby pushing the extension plate and causing the connector and the second connecting pipe to rotate synchronously.

[0017] In the technical solution of the present invention, the inner end of the aeration head is connected to the inner end of the mounting plate, the middle part of the aeration head is coaxially provided with a rotating shaft, the outer end of the rotating shaft passes through the air outlet surface of the aeration head and a cleaning plate is fixed at the end, the inner end of the cleaning plate is coaxially fixed with a fan blade, the fan blade is arranged perpendicularly to the inner end pipe of the aeration head, and the cleaning plate is in close contact with the air outlet surface of the aeration head.

[0018] In this setup, by installing a cleaning plate and fan blades, when the opening on the air supply pipe is connected to the aeration head, the carbon dioxide gas accumulated in the second connecting pipe will be quickly ejected, driving the fan blades to rotate and causing the cleaning plate to rotate to clean the outer surface of the aeration head, thus preventing the surface of the aeration head's air inlet from becoming blocked, which could affect microalgae cultivation and cause danger.

[0019] In the technical solution of the present invention, the left and right width of the pusher plate is equal to half the distance between the inner wall of the aquaculture pond and the outer wall of the partition wall, and a horizontal toothed plate is fixed in the middle of the left side wall of the pusher plate.

[0020] In this setting, the width of the pusher plate is equal to half the distance between the inner wall of the aquaculture tank and the outer wall of the partition wall, to avoid the pusher plate being too narrow and thus unable to fully propel the liquid flow in the aquaculture tank.

[0021] In the technical solution of the present invention, the surface of the baffle plate on the right side is bent clockwise from the inside to the outside, and the surface of the baffle plate on the left side is bent counterclockwise from the inside to the outside. The four baffle plates are arranged in a ring as a group. The outer end of each group of baffle plates is rotatably connected to the inner wall of the aquaculture pond. A gear is coaxially fixed at the inner end of each group of baffle plates, and the gear meshes with the toothed plate.

[0022] In this setup, the surface of the right-side spoiler is curved clockwise from the inside out, while the surface of the left-side spoiler is curved counterclockwise from the inside out. This ensures that when the spoilers rotate, the concave parts of the bends face the water surface, allowing the spoilers to cause the water to surge up and down.

[0023] In the technical solution of the present invention, the gas supply pipe is a retractable metal corrugated pipe, the gas supply pipe is connected to the gas pump outlet through a rotary joint, and the gas pump inlet is connected to an external carbon dioxide generator.

[0024] In this configuration, the gas supply pipe is made of a retractable metal corrugated pipe to ensure that the gas supply pipe does not obstruct the movement of the propulsion component during its movement. A rotary joint is also used to prevent the gas supply pipe from over-rotating and leaking.

[0025] On the other hand, the present invention also provides an operation method for an integrated water circulation purification and water-saving irrigation device suitable for microalgae cultivation, comprising the following steps:

[0026] S1. After pre-treating the aquaculture wastewater, it is introduced into the aquaculture pond, and then suitable microalgae are inoculated into the aquaculture pond.

[0027] S2. During the breeding process, the servo motor is started to drive the mounting plate to move counterclockwise along the outer wall of the partition wall, which in turn drives the pusher plate to move counterclockwise, thereby promoting the flow of liquid in the breeding pond and improving the breeding effect.

[0028] S3. While the pusher plate moves, the air pump is started, so that carbon dioxide enters the first connecting pipe and then the second connecting pipe from the gas supply pipe. When the mounting plate moves, the extended plate on the connector intermittently contacts the pusher plate and rotates. When the opening on the gas supply pipe is connected to the aeration head, the carbon dioxide gas accumulated in the second connecting pipe will be quickly sprayed out to improve the raw materials for microalgae photosynthesis.

[0029] S4. When the toothed plate on the push plate moves to contact the gear, it will drive the baffle to rotate, causing the liquid and microalgae in the aquaculture tank to surge up and down, and receive light evenly.

[0030] S5. After the microalgae have purified the effluent, the microalgae and purified water can be separated by a filtration device. The purified water can then be fed into a sedimentation tank for irrigation.

[0031] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0032] 1. In this invention, by setting up a drive component, a mounting plate and a flow-pushing plate, when cultivating microalgae, the servo motor is started to drive the mounting plate to move counterclockwise along the outer wall of the partition wall, which in turn drives the flow-pushing plate to move counterclockwise, thereby promoting the flow of liquid in the cultivation tank and improving the cultivation effect.

[0033] 2. In this invention, by setting a connector, an extension plate, and a deflector, the air pump is started while the pusher plate moves, so that carbon dioxide enters the first connecting pipe from the gas supply pipe and then enters the second connecting pipe. At the same time, the extension plate on the connector intermittently contacts the deflector and rotates. When the opening on the gas supply pipe is connected to the aeration head, the carbon dioxide gas accumulated in the second connecting pipe will be quickly sprayed out to improve the raw materials for microalgae photosynthesis, improve the uniformity of aeration, and avoid excessive local carbon dioxide concentration that could lead to the death of microalgae.

[0034] 3. In this invention, by setting a cleaning plate and fan blades, when the opening on the air supply pipe is connected to the aeration head, the carbon dioxide gas accumulated in the second connecting pipe will be quickly sprayed out, driving the fan blades to rotate and causing the cleaning plate to rotate to clean the outer surface of the aeration head, thus avoiding blockage of the air outlet surface of the aeration head, which would affect microalgae cultivation and cause danger.

[0035] 4. In this invention, by setting a baffle, when the toothed plate on the push plate moves to contact the gear on the baffle, it will drive the baffle to rotate, causing the liquid and microalgae in the aquaculture pond to surge up and down, and receive light evenly. Attached Figure Description

[0036] Figure 1 This is a simplified schematic diagram of the overall structure of the present invention;

[0037] Figure 2 This is a cross-sectional view of the aquaculture pond of the present invention;

[0038] Figure 3 This is a schematic diagram of the jetting plate in this invention;

[0039] Figure 4 This is a cross-sectional view of the thrust plate in this invention;

[0040] Figure 5 This is another cross-sectional view of the thruster plate in this invention;

[0041] Figure 6 This is a schematic diagram of the connector in this invention;

[0042] Figure 7 This is an exploded view of the aeration head in this invention;

[0043] Figure 8 This is a schematic diagram of the disturbance plate in this invention;

[0044] Figure 9 This is a schematic diagram of the aquaculture pond in this invention;

[0045] Explanation of reference numerals in the attached figures:

[0046] 100. Aquaculture pond; 101. Dividing wall; 102. First outward protrusion; 103. Second outward protrusion; 104. Pulley;

[0047] 200. Drive assembly; 201. Servo motor; 202. Rotary wheel; 203. Track;

[0048] 300. Flow propulsion assembly; 301. Mounting plate; 3011. First slot; 3012. Second slot; 3013. Dial plate slot; 302. Flow propulsion plate; 3021. Toothed plate; 303. Aeration head; 304. Baffle plate; 3041. Gear; 305. Air pump; 3051. Air supply pipe; 306. First connecting pipe; 307. Second connecting pipe; 3071. Connector; 3072. Outer plate; 308. Cleaning plate; 3081. Rotating shaft; 309. Fan blade. Detailed Implementation

[0049] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0050] Unless otherwise expressly stated, throughout this specification, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0051] Reference Figures 1-9 As shown, this embodiment provides a technical solution:

[0052] An integrated water circulation purification and water-saving irrigation device suitable for microalgae cultivation includes a racetrack-shaped cultivation pond 100. A proportionally scaled-down partition wall 101 is provided in the middle of the cultivation pond 100. A flow propulsion component 300 is provided on the outer wall of the partition wall 101. A drive component 200 is provided inside the partition wall 101 to drive the flow propulsion component 300 to move along the outer wall of the partition wall 101. By setting the flow propulsion component 300, the liquid in the cultivation pond 100 is propelled to flow, so that the microalgae are evenly illuminated, while avoiding the sedimentation of microalgae and sediment, which would cause pollution and affect water purification.

[0053] The propulsion assembly 300 includes a mounting plate 301 connected to the drive assembly 200, a propulsion plate 302 mounted on the mounting plate 301, several aeration heads 303 staggered on the side wall near the bottom of the mounting plate 301, and several sets of baffles 304 regularly arranged on the inner side wall of the aquaculture tank 100. The surface of the propulsion plate 302 is perpendicular to the water flow direction in the aquaculture tank 100. A horizontal second connecting pipe 307 is provided in the bottom of the mounting plate 301. The second connecting pipe 307 is rotatably connected to the mounting plate 301. Several air holes corresponding to the positions of the aeration heads 303 are provided on the pipe wall of the second connecting pipe 307. A connector 3071 is fixedly connected to the left end of the second connecting pipe 307. Several extension plates 3072 are vertically provided on the outer wall of the connector 3071. Several baffles 104 are regularly distributed in a racetrack pattern at the bottom of the aquaculture tank 100.

[0054] Considering that when treating wastewater from microalgae cultivation, fixed flow promoters are typically used to propel the wastewater and microalgae, large raceway tanks require multiple flow promoters. Furthermore, during cultivation, aeration points are usually fixed, which can easily lead to excessively high local carbon dioxide concentrations, causing microalgae death and affecting cultivation. Additionally, fixed aeration points allow microalgae to easily adhere to the surface of the aeration device, causing blockages and prolonged periods without aeration, which not only affects microalgae cultivation but also poses a safety hazard. Therefore, this technical solution integrates the aeration head 303 and the flow promoter 302 together. The drive component 200 moves the mounting plate 301, causing the flow promoter 302 to move and propel the wastewater. This eliminates the need for multiple flow promoters, reducing costs. Simultaneously, the aeration head 303 moves synchronously to change position, improving the uniformity of carbon dioxide injection and preventing excessively high local carbon dioxide concentrations that could kill microalgae. Furthermore, the surface of the aeration head 303 is cleaned during aeration to prevent blockages.

[0055] Please refer to the following: Figures 1-2 As shown, the straight and curved sections of the outer wall of the partition wall 101 are respectively fixed with a first protrusion 102 and a second protrusion 103. The first protrusion 102 is located above the second protrusion 103. The mounting plate 301 is L-shaped in general. The upper and lower parts of the inner side of the vertical section of the mounting plate 301 are respectively provided with a first slot 3011 and a second slot 3012. The first protrusion 102 is slidably connected to the first slot 3011, and the second protrusion 103 is slidably connected to the second slot 3012. By setting the first protrusion 102 and the second protrusion 103, the mounting plate 301 is more stable when it moves with the drive assembly 200, and the water resistance on the mounting plate 301 is prevented from being directly transmitted to the drive assembly 200 and affecting the operation of the drive assembly 200.

[0056] Furthermore, the drive assembly 200 includes a servo motor 201, two rotating wheels 202, and a track 203 sleeved between the two rotating wheels 202. The bottom of the servo motor 201 is fixedly connected to the inner bottom surface of the partition wall 101, and the output shaft of the servo motor 201 is coaxially fixedly connected to the front rotating wheel 202. The top of the vertical section of the mounting plate 301 is fixedly connected to the outer surface of the track 203. By setting the drive assembly 200, when in use, the servo motor 201 is started to drive the front rotating wheel 202 to rotate, thereby causing the track 203 to rotate, which in turn drives the mounting plate 301 to move along the outer wall of the partition wall 101.

[0057] Please see Figures 2-6 As shown, an air pump 305 is fixed in the middle of the bottom surface of the partition wall 101. The air outlet of the air pump 305 is connected to an air supply pipe 3051. The air supply pipe 3051 is a retractable metal corrugated pipe to ensure that the air supply pipe 3051 will not obstruct the movement of the propulsion assembly 300 during its movement. The air supply pipe 3051 and the air outlet of the air pump 305 are connected through a rotary joint. During the propulsion of the propulsion assembly 300, the air supply pipe 3051 will rotate synchronously. The rotary joint is set to prevent the air supply pipe 3051 from over-rotating and leaking air. The air inlet of the air pump 305 is connected to an external carbon dioxide generator. When carbon dioxide is introduced, the air pump 305 sends the carbon dioxide from the air supply pipe 3051 into the aeration head 303 for aeration.

[0058] In addition, a first connecting pipe 306 is provided in the vertical section of the mounting plate 301. The bottom end of the first connecting pipe 306 is connected to the left end of the connector 3071 and the two are rotatably connected. The connector 3071 is a rotary joint. By setting the connector 3071 to connect the first connecting pipe 306, air leakage is avoided when the first connecting pipe 306 and the second connecting pipe 307 rotate relative to each other.

[0059] Please see Figure 3 and Figure 9 As shown, the vertical section of the mounting plate 301 has a push plate groove 3013 near the bottom. The size of the push plate groove 3013 is larger than the size of the push plate 104. The extension plate 3072 extends out of the push plate groove 3013. By setting the push plate groove 3013, the push plate 104 can contact the extension plate 3072, so that the push plate 104 can push the extension plate 3072, thereby driving the connector 3071 and the second connecting pipe 307 to rotate synchronously.

[0060] Please see Figure 5 and Figure 7As shown, the inner end of the aeration head 303 is connected to the mounting plate 301. A rotating shaft 3081 is coaxially provided in the middle of the aeration head 303. The outer end of the rotating shaft 3081 passes through the air outlet surface of the aeration head 303 and a cleaning plate 308 is fixed to the end. A fan blade 309 is coaxially fixed to the inner end of the cleaning plate 308. The fan blade 309 is perpendicular to the inner end pipe of the aeration head 303. The cleaning plate 308 is in close contact with the air outlet surface of the aeration head 303. By setting the cleaning plate 308 and the fan blade 309, when the opening on the air supply pipe 3051 is connected to the aeration head 303, the carbon dioxide gas accumulated in the second connecting pipe 307 will be quickly sprayed out, pushing the fan blade 309 to rotate and causing the cleaning plate 308 to rotate to clean the outer surface of the aeration head 303, so as to avoid the blockage of the air outlet surface of the aeration head 303, which would affect the microalgae cultivation and cause danger.

[0061] Please see Figure 1 , Figure 3 and Figure 8 As shown, the width of the pusher plate 302 is equal to half the distance between the inner wall of the aquaculture tank 100 and the outer wall of the partition wall 101, so as to avoid the pusher plate 302 being too small and thus unable to fully push the liquid flow in the aquaculture tank 100.

[0062] Specifically, a horizontal toothed plate 3021 is fixed in the middle of the left side wall of the propeller plate 302. The plate surface of the right-side baffle plate 304 is bent clockwise from the inside to the outside, and the plate surface of the left-side baffle plate 304 is bent counterclockwise from the inside to the outside. This ensures that when the baffle plate 304 rotates, the concave part of the bend of the baffle plate 304 faces the water surface, so that the baffle plate 304 can drive the water flow to surge up and down.

[0063] In addition, four baffles 304 are arranged in a ring as a group. The outer end of each group of baffles 304 is rotatably connected to the inner wall of the aquaculture tank 100. The inner end of each group of baffles 304 is coaxially fixed with a gear 3041. The gear 3041 meshes with the toothed plate 3021. When the toothed plate 3021 on the pusher plate 302 moves to contact the gear 3041, it will drive the baffles 304 to rotate, causing the liquid and microalgae in the aquaculture tank 100 to surge up and down, and receive light evenly.

[0064] The operation method of the integrated water circulation purification and water-saving irrigation equipment for microalgae cultivation in this invention includes the following steps:

[0065] S1. After pre-treating the aquaculture wastewater, it is introduced into the aquaculture pond 100, and then suitable microalgae are inoculated into the aquaculture pond 100.

[0066] S2. During the breeding process, the servo motor 201 is started to drive the mounting plate 301 to move counterclockwise along the outer wall of the partition wall 101, which in turn drives the pusher plate 302 to move counterclockwise, thereby promoting the flow of liquid in the breeding pond 100 and improving the breeding effect.

[0067] S3. While the push plate 302 moves, the air pump 305 is started, so that carbon dioxide enters the first connecting pipe 306 from the gas supply pipe 3051 and then enters the second connecting pipe 307. When the mounting plate 301 moves, the extended plate 3072 on the connector 3071 intermittently contacts the lever plate 104 and rotates. When the opening on the gas supply pipe 3051 is connected to the aeration head 303, the carbon dioxide gas accumulated in the second connecting pipe 307 will be quickly sprayed out to improve the raw materials for microalgae photosynthesis. At the same time, the carbon dioxide airflow will also drive the fan blade 309 to rotate, which will drive the cleaning plate 308 to rotate and clean the outer surface of the aeration head 303.

[0068] S4. When the toothed plate 3021 on the pusher plate 302 moves to contact the gear 3041, it will drive the baffle plate 304 to rotate, causing the liquid and microalgae in the aquaculture pond 100 to surge up and down and receive light evenly.

[0069] S5. After the microalgae purifies the effluent, the microalgae and purified water can be separated by a filtration device. The purified water can be passed into a sedimentation tank and used for irrigation. Meanwhile, the filtered microalgae can be used for bioenergy, feed, or further processed to obtain high-value-added products.

[0070] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the specification and its equivalents.

Claims

1. An integrated water circulation, purification, and water-saving irrigation system suitable for microalgae cultivation, comprising a racetrack-shaped cultivation pond, characterized in that: The aquaculture pond has a proportionally scaled-down partition wall in the middle. The outer wall of the partition wall is equipped with a flow propulsion component for promoting the flow of liquid in the aquaculture pond. The partition wall is equipped with a drive component for driving the flow propulsion component to move along the outer wall of the partition wall. The propulsion assembly includes a mounting plate connected to the drive assembly, a propulsion plate mounted on the mounting plate, several aeration heads staggered at the bottom of the side wall of the mounting plate, and several sets of baffles regularly arranged on the inner side wall of the aquaculture tank. The surface of the propulsion plate is perpendicular to the water flow direction in the aquaculture tank. A horizontal second connecting pipe is provided at the bottom of the mounting plate. The second connecting pipe is rotatably connected to the mounting plate. Several air holes corresponding to the positions of the aeration heads are provided on the wall of the second connecting pipe. A connector is fixedly connected to the left end of the second connecting pipe. Several outward plates are vertically provided on the outer wall of the connector. Several baffles are regularly distributed in a racetrack pattern at the bottom of the aquaculture tank.

2. The integrated water circulation purification and water-saving irrigation equipment for microalgae cultivation as described in claim 1, characterized in that: The straight and curved sections of the outer wall of the partition wall are respectively fixed with a first outward protrusion and a second outward protrusion. The first outward protrusion is located above the second outward protrusion. The mounting plate is L-shaped in general. The upper and lower parts of the inner side of the vertical section of the mounting plate are respectively provided with a first slot and a second slot. The first outward protrusion is slidably connected to the first slot, and the second outward protrusion is slidably connected to the second slot.

3. The integrated water circulation purification and water-saving irrigation equipment for microalgae cultivation as described in claim 2, characterized in that: The drive assembly includes a servo motor, two wheels, and a track fitted between the two wheels. The bottom of the servo motor is fixedly connected to the inner bottom surface of the partition wall, and the output shaft of the servo motor is coaxially fixedly connected to the front wheel. The top of the vertical section of the mounting plate is fixedly connected to the outer surface of the track.

4. The integrated water circulation purification and water-saving irrigation equipment for microalgae cultivation as described in claim 3, characterized in that: An air pump is fixed in the middle of the bottom surface of the partition wall. The air pump outlet is connected to an air supply pipe. A first connecting pipe is provided in the vertical section of the mounting plate. The bottom end of the first connecting pipe is connected to the left end of the connector and the two are rotatably connected.

5. The integrated water circulation purification and water-saving irrigation equipment for microalgae cultivation as described in claim 4, characterized in that: The vertical section of the mounting plate has a sliding plate groove near the bottom, the size of the sliding plate groove is larger than the size of the sliding plate, and the extension plate extends out of the sliding plate groove.

6. The integrated water circulation purification and water-saving irrigation equipment for microalgae cultivation as described in claim 5, characterized in that: The inner end of the aeration head is connected to the mounting plate. A rotating shaft is coaxially provided in the middle of the aeration head. The outer end of the rotating shaft passes through the air outlet surface of the aeration head and a cleaning plate is fixed at the end. A fan blade is coaxially fixed at the inner end of the cleaning plate. The fan blade is perpendicular to the inner end pipe of the aeration head. The cleaning plate is in close contact with the air outlet surface of the aeration head.

7. The integrated water circulation purification and water-saving irrigation equipment for microalgae cultivation as described in claim 6, characterized in that: The width of the pusher plate is equal to half the distance between the inner wall of the aquaculture tank and the outer wall of the partition wall, and a horizontal toothed plate is fixed in the middle of the left side wall of the pusher plate.

8. The integrated water circulation purification and water-saving irrigation equipment for microalgae cultivation as described in claim 7, characterized in that: The surface of the baffle on the right side is curved clockwise from the inside to the outside, and the surface of the baffle on the left side is curved counterclockwise from the inside to the outside. The four baffles are arranged in a ring as a group. The outer end of each group of baffles is rotatably connected to the inner wall of the aquaculture pond. A gear is coaxially fixed at the inner end of each group of baffles, and the gear meshes with the toothed plate.

9. The integrated water circulation purification and water-saving irrigation equipment for microalgae cultivation as described in claim 8, characterized in that: The gas supply pipe is a retractable metal corrugated pipe. The gas supply pipe is connected to the gas pump outlet through a rotary joint, and the gas pump inlet is connected to an external carbon dioxide generator.

10. An operating method for an integrated water circulation purification and water-saving irrigation system suitable for microalgae cultivation, employing the integrated water circulation purification and water-saving irrigation system for microalgae cultivation as described in claim 9, characterized in that... Includes the following steps: S1. After pre-treating the aquaculture wastewater, it is introduced into the aquaculture pond, and then suitable microalgae are inoculated into the aquaculture pond. S2. During the breeding process, the servo motor is started to drive the mounting plate to move counterclockwise along the outer wall of the partition wall, which in turn drives the pusher plate to move counterclockwise, thereby promoting the flow of liquid in the breeding pond and improving the breeding effect. S3. While the pusher plate moves, the air pump is started, so that carbon dioxide enters the first connecting pipe and then the second connecting pipe from the gas supply pipe. When the mounting plate moves, the extended plate on the connector intermittently contacts the pusher plate and rotates. When the opening on the gas supply pipe is connected to the aeration head, the carbon dioxide gas accumulated in the second connecting pipe will be quickly sprayed out to improve the raw materials for microalgae photosynthesis. At the same time, the carbon dioxide airflow will also drive the fan blade to rotate and drive the cleaning plate to rotate to clean the outer surface of the aeration head. S4. When the toothed plate on the push plate moves to contact the gear, it will drive the baffle to rotate, causing the liquid and microalgae in the aquaculture tank to surge up and down, and receive light evenly. S5. After the microalgae have purified the effluent, the microalgae and purified water can be separated by a filtration device. The purified water can then be fed into a sedimentation tank for irrigation.

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