Microalgae particle incubator and system for carbon capture

Abstract

The invention provides a microalgae particle culture device and system for carbon capture, the microalgae particle culture device for carbon capture comprises a tank body, a first guide cylinder and a second guide cylinder, the tank body is provided with a bottom water inlet pipe and an upper overflow port, the first guide cylinder is coaxially arranged in the middle of the tank body, and the second guide cylinder is coaxially arranged in the middle of the tank body; the bottom of the water inlet pipe is opposite to the water inlet pipe and forms an overflow gap with the bottom of the tank body, and a flow guide component positioned below the overflow port is arranged above the top and forms an overflow gap with the top; the top of the second guide cylinder is fixed with the top wall of the tank body, the bottom of the second guide cylinder sleeves the periphery of the first guide cylinder, and overflowing gaps are formed among the second guide cylinder, the inner wall of the tank body and the first guide cylinder; and a lighting assembly is arranged in at least one of the tank body, the first guide cylinder or the second guide cylinder. According to the application, efficient particle culture, convenient harvesting and carbon sequestration are realized by constructing a stable backflow channel, inducing particle deposition, promoting microalgae suspension flow and particle aggregation, providing directional light supplement by the lighting assembly, improving the photosynthetic efficiency and enhancing CO2 absorption of a water body.

Description

Technical Field

[0001] The present application relates to the field of environmental engineering technology, and in particular to a microalgae particle culture device and system for carbon capture. Background Art

[0002] With the rapid development of marine aquaculture, large amounts of aquaculture wastewater, rich in nutrients such as nitrogen and phosphorus, are being discharged directly into the sea, causing severe eutrophication and ecological damage. To alleviate the pollution pressure caused by aquaculture tailwater, chemical precipitation and other methods are often used to purify the wastewater. However, these traditional methods generally suffer from high operating costs and limited treatment efficiency. Therefore, the use of microalgae for simultaneous purification and carbon fixation of aquaculture wastewater has become a research hotspot.

[0003] Marine microalgae carbon sequestration technology is a biotechnology that uses marine microalgae to fix carbon dioxide. Marine microalgae are tiny plants found throughout the ocean. They are capable of photosynthesis, using sunlight, water, and carbon dioxide to grow and reproduce. Through photosynthesis, marine microalgae convert carbon dioxide into organic matter, thereby achieving carbon sequestration.

[0004] Marine microalgae carbon sequestration technology offers numerous advantages. First, marine microalgae have high photosynthetic efficiency, rapidly absorbing and converting carbon dioxide, thereby achieving efficient carbon sequestration. Second, marine microalgae grow rapidly and reproduce vigorously, capable of rapidly generating large biomass, further improving carbon sequestration efficiency. Furthermore, marine microalgae are highly adaptable to their environment and can grow in diverse marine environments, offering broad application prospects.

[0005] Marine microalgae carbon sequestration technology has broad application prospects. First, it can be used to reduce atmospheric carbon dioxide concentrations, mitigating global warming. Second, it can be integrated with marine aquaculture to achieve sustainable utilization of marine resources. Furthermore, marine microalgae can be used to produce high-value-added bioproducts such as biofertilizers and biofeed, generating significant economic benefits.

[0006] In summary, marine microalgae carbon sequestration is a biotechnology with enormous potential. It can effectively reduce atmospheric carbon dioxide concentrations and alleviate global warming. With continued in-depth research and expanded applications, marine microalgae carbon sequestration technology will make a significant contribution to humanity's response to climate change and the achievement of sustainable development.

[0007] However, existing microalgae cultivation systems have problems such as difficulty in harvesting microalgae and easy loss with water flow, which means that they still face certain challenges in practical applications.

[0008] In view of this, how to efficiently harvest microalgae and reduce microalgae loss in microalgae cultivation for carbon capture has become an urgent problem that needs to be solved. Summary of the Invention

[0009] In view of this, the purpose of this application is to propose a microalgae particle culture device and system for carbon capture to solve or partially solve the above technical problems.

[0010] Based on the above objectives, the first aspect of the present application provides a microalgae particle culture device for carbon capture, comprising:

[0011] The tank body includes a water inlet pipe and an overflow port, wherein the water inlet pipe is located at the bottom of the tank body and the overflow port is located at the outer periphery of the upper portion of the tank body;

[0012] a first guide tube coaxially disposed in the middle of the tank body; a bottom of the first guide tube is disposed opposite to the water outlet of the water inlet pipe, and a flow gap is provided between the first guide tube and the bottom of the tank body;

[0013] a second flow guide tube coaxially disposed in the upper portion of the tank body, with its top fixedly connected to the top wall of the tank body, and its bottom sleeved around the top periphery of the first flow guide tube, with a flow gap between it and the inner wall of the tank body; at least a portion of the first flow guide tube is located in the fluid passage of the second flow guide tube, with a flow gap between it and the inner wall of the second flow guide tube;

[0014] Among them, at least one of the first guide tube, the second guide tube and the tank body is a double shell structure; the double shell structure includes an outer shell and an inner shell, which together form an annular chamber, and a plurality of lighting components are arranged in the annular chamber.

[0015] Optionally, a plurality of annular mounting grooves are arranged in the annular chamber along its axial direction, and a group of the lighting components is provided in each of the annular mounting grooves.

[0016] Optionally, a flow guiding member is further provided above the top of the first flow guiding tube, the flow guiding member is located below the overflow port, and a flow gap exists between the flow guiding member and the top of the first flow guiding tube;

[0017] The flow guide member includes an upper conical surface and a lower conical surface connected along the axial direction, wherein the upper conical surface is located above the lower conical surface;

[0018] The upper and lower conical surfaces are both conical structures. The inner diameter of the upper conical surface gradually shrinks from bottom to top along the axial direction of the tank body; the inner diameter of the lower conical surface gradually increases from bottom to top along the axial direction of the tank body; the lower cone angle of the lower cone surface is smaller than the upper cone angle of the upper cone surface.

[0019] Optionally, a third flow guide cover whose diameter gradually shrinks from bottom to top along the axial direction of the tank body is connected to the top of the first flow guide tube, and a flow gap exists between the outer wall of the third flow guide cover and the inner wall of the second flow guide tube.

[0020] Optionally, a second flow guide cover with an outwardly expanded diameter is connected to the bottom of the second flow guide cylinder, and the second flow guide cover includes an extension section and an expansion section connected in sequence from bottom to top along the axial direction of the tank body;

[0021] The inner diameter of the expansion section gradually increases from top to bottom along the axial direction of the tank body, one end of the upper portion is connected to the bottom of the second guide tube, and one end of the bottom portion is connected to the extension section;

[0022] At least part of the extension section is sleeved between the first flow guide tube and the tank body, and a flow gap exists between the first flow guide tube and the tank body.

[0023] Optionally, a first flow guide cover with an outwardly expanded diameter is connected to the bottom of the first flow guide cylinder, and there are flow gaps between the edge of the bottom of the first flow guide cover and the inner wall and side wall of the bottom of the tank body.

[0024] Optionally, the tank body includes a culture section and an overflow section connected sequentially from bottom to top, and the inner diameter of the culture section is less than or equal to the inner diameter of the overflow section; the first guide tube is located in the culture section, the bottom of the second guide tube is located in the culture section, and the top thereof is located in the overflow section.

[0025] Optionally, at least part of the top of the culture section is inserted into the overflow section to form an overflow weir; the overflow weir, the bottom wall of the overflow section and the inner side wall of the overflow section together form an overflow trough, and the overflow trough is connected to the overflow port.

[0026] Optionally, an aeration plate is further provided at the bottom of the tank body, and the aeration plate is connected to the air inlet pipe.

[0027] Based on the same inventive concept, the second aspect of the present application further provides a microalgae particle cultivation system, comprising any of the microalgae particle culture devices for carbon capture described above.

[0028] From the above description, it can be seen that the microalgae particle culture device and system for carbon capture provided by the present application. Among them, the microalgae particle culture device for carbon capture includes a tank body, a first guide tube and a second guide tube, wherein the tank body is provided with a bottom water inlet pipe and an upper peripheral overflow port, the first guide tube is arranged in the middle of the tank body, its bottom is opposite to the water outlet of the water inlet pipe, and there is a flow gap between it and the bottom of the tank body; the second guide tube is fixedly connected to the top wall of the tank body, and extends downward to be arranged to be sleeved on the top periphery of the first guide tube, and a flow gap is formed between it and the inner wall of the tank body and the outer wall of the first guide tube; wherein, at least one of the tank body, the first guide tube or the second guide tube adopts a double shell structure, and the double shell is composed of an inner and outer shell, and a number of lighting components are arranged in the annular chamber therebetween. In this application, a second guide tube extends downward from the top wall of the tank body, and its bottom is arranged around the outer periphery of the top of the first guide tube. A flow gap is provided between the outer wall of the second guide tube and the inner wall of the tank body, and between the inner wall and the first guide tube, forming a surrounding recirculation channel. This can stabilize the growth environment of microalgae, suppress turbulent interference, and further promote particle formation. The construction of the fluid path from the bottom of the tank body to the center of the first guide tube causes the microalgae to be in a suspended flow state and easily granulated. At the same time, the flow gap can also effectively induce the fluid to form a low-speed recirculation zone in a specific area, which is conducive to the aggregation and deposition of particles and facilitates centralized harvesting. In addition, the annular lighting assembly in the double-shell structure can provide internal directional supplementary lighting, enhance light penetration and distribution uniformity, significantly improve the photosynthesis efficiency of microalgae, enhance the absorption and utilization rate of CO2 in the water body, thereby achieving efficient carbon capture and fixation, and further promote particle formation and stable growth. Ultimately, it realizes the efficiency of microalgae granular cultivation, the convenience of harvesting, and the restoration of carbon capture to the ocean. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 This is a schematic cross-sectional view of a microalgae particle culture device according to an embodiment of the present application;

[0031] Figure 2 This is a partially enlarged schematic diagram of the cross-sectional structure of the microalgae particle culture device according to an embodiment of the present application;

[0032] Figure 3 A top view of a microalgae particle culture device according to an embodiment of the present application;

[0033] Figure 4Schematic diagram of the microalgae circulation path in the microalgae particle culture device according to an embodiment of the present application;

[0034] Figure 5 This is a cross-sectional schematic diagram of a microalgae particle culture device according to an embodiment of the present application having a third flow guide cover installed therein;

[0035] Figure 6 Schematic diagram of the microalgae circulation path of the microalgae particle culture device equipped with a third flow guide cover according to an embodiment of the present application.

[0036] Description of reference numerals:

[0037] 1. Tank body; 1a. Cultivation section; 1b. Overflow section; 11. Water inlet pipe; 12. Overflow port; 13. Overflow weir; 14. Overflow trough; 2. First guide tube; 21. First guide cover; 22. Third guide cover; 3. Second guide tube; 31. Second guide cover; 311. Expansion section; 312. Extension section; 4. Guide member; 41. Upper cone surface; 412. Upper cone angle; 42. Lower cone surface; 421. Lower cone angle; 5. Annular chamber; 5a. Inner shell; 5b. Outer shell; 51. Annular mounting groove; 52. Lighting assembly; 6. Aeration plate; 61. Inlet pipe; 7. Inspection hole; 8. Mounting seat. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0039] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] As described in the background technology, with the large-scale expansion of marine aquaculture, the large amount of wastewater discharged during the aquaculture process has become an important source of marine ecological pollution. These aquaculture tailwaters are generally rich in nutrients such as nitrogen and phosphorus. Direct discharge into the sea easily leads to eutrophication of water bodies and causes ecological disasters. In order to deal with pollution, traditional water treatment methods such as chemical precipitation, artificial wetlands, and biofilters are often used to purify them. Pollutants in aquaculture tailwater are removed by sedimentation, adsorption, or microbial degradation, and the initial effect is relatively obvious. However, such methods generally have problems such as high operating costs and reduced treatment efficiency over time, making it difficult to meet the long-term and stable discharge requirements of large-scale aquaculture wastewater.

[0041] To address these issues, reduce aquaculture wastewater treatment and purification costs, and improve treatment efficiency, the use of microalgae for simultaneous purification and carbon fixation of aquaculture wastewater has become a growing research hotspot. As typical photosynthetic autotrophs, microalgae efficiently absorb nutrients such as nitrogen and phosphorus from water bodies, while simultaneously fixing carbon dioxide through photosynthesis. This not only improves water quality but also has the added benefit of ecological carbon reduction. Compared to traditional methods, microalgae treatment is greener and more sustainable, and has the potential to transform "pollutants" into "resources."

[0042] However, the applicant discovered that while the simultaneous purification and carbon fixation of aquaculture wastewater using microalgae has, to some extent, addressed the high operating costs and time-dependent degradation of treatment efficiency common in traditional methods, current microalgae cultivation, which mostly utilizes microalgae suspension culture systems, presents challenges such as small algae particle size, high dispersion, and easy loss with water flow. This results in a complex microalgae harvesting process, high energy consumption, and low biomass recovery rates, restricting the economic efficiency and stable operation of the system. Furthermore, these microalgae cultivation systems are highly sensitive to light intensity conditions, further hindering the widespread application of microalgae treatment in practical projects.

[0043] In response to the above problems, the applicant proposed a microalgae particle culture device and system with microalgae granulation and built-in light source, such as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a microalgae particle culture device for carbon capture comprises:

[0044] The tank body 1 includes a water inlet pipe 11 and an overflow port 12. The water inlet pipe 11 is located at the bottom of the tank body 1, and the overflow port 12 is located at the upper periphery of the tank body 1;

[0045] A first flow guide tube 2 is coaxially arranged in the middle of the tank body 1; the bottom of the first flow guide tube 2 is arranged opposite to the water outlet of the water inlet pipe 11, and a flow gap is formed between the first flow guide tube 2 and the bottom of the tank body 1; a second flow guide tube 3 is coaxially arranged in the upper part of the tank body 1, the top of the first flow guide tube 3 is fixedly connected to the inner top wall of the tank body 1, and the bottom of the first flow guide tube 3 is sleeved on the outer periphery of the top of the first flow guide tube 2, and a flow gap is formed between the first flow guide tube 2 and the inner wall of the tank body 1; at least a portion of the first flow guide tube 2 is located in the fluid channel of the second flow guide tube 3, and a flow gap is formed between the first flow guide tube 2 and the inner wall of the second flow guide tube 3;

[0046] Among them, at least one of the first guide tube 2, the second guide tube 3 and the tank body 1 is a double-shell structure; the double-shell structure includes an outer shell 5b and an inner shell 5a, which together form an annular chamber 5, and a plurality of lighting components 52 are arranged in the annular chamber 5.

[0047] For example, the tank body 1 serves as the main culture chamber, responsible for containing aquaculture wastewater and microalgae, while also accommodating and supporting the internal structure. A water inlet pipe 11 is provided at the bottom to guide the water to flow from bottom to top, while an overflow port 12 is provided at the top to discharge the treated water. A first guide tube 2 and a second guide tube 3 are arranged inside the tank body 1. At least part of the first guide tube 2 is inserted into the second guide tube 3, and there is a flow gap, so that the two form a coaxial surround structure, respectively assuming the functions of main upflow and peripheral reflux. The first guide tube 2 is the internal mainstream channel, and its bottom is arranged opposite to the water inlet pipe 11, without being directly connected, thereby forming fluid suction at the entrance to drive the water up; at least one of the first guide tube 2, the second guide tube 3, and the tank body 1 is a double-shell structure, forming an annular chamber 5 where the lighting component 52 is arranged to ensure uniform illumination of the microalgae throughout the water column.

[0048] For example, the tank body 1 can be made of corrosion-resistant, light-transmitting or high-strength materials; the illuminated annular cavity needs to be waterproof and sealed, and the material is light-transmitting material; in addition, the spacing of the flow gap can be adjusted according to the size of the microalgae particles to ensure the accuracy of the selective separation of the particles.

[0049] Exemplarily, the tank body 1 is further provided with a matching mounting seat 8 .

[0050] For example, the lighting assembly 52 is arranged in the double-shell structure through the annular chamber 5, and a high-protection-level LED or fiber optic lighting module can be used to evenly distribute the light source along the water column, solving the problem of traditional lighting "low illumination in the central area and strong but wasteful outer layer", improving the photosynthetic efficiency of algae, further promoting particle formation, and enhancing the absorption and utilization rate of CO2 in water bodies, thereby achieving efficient carbon capture and fixation.

[0051] This embodiment is explained using the formation of microalgae particles as an example. It should be noted that the formation of microalgae particles primarily relies on physical mechanisms such as fluid shear, collision aggregation, and backflow screening. Structurally, the first guide tube 2 is vertically arranged in the center of the tank body 1. The flow gap between the bottom and outer wall of the first guide tube 2 and the inner wall of the tank body 1 creates a stable upwelling when water is input from the water inlet pipe 11. The microalgae rise with the water flow within the first guide tube 2 and continuously collide and shear along the flow path, promoting the secretion of extracellular polymers (EPS) and cell aggregation of the microalgae to form preliminary particles. At the same time, an annular lighting assembly 52 is embedded in the double-shell structure to provide uniform illumination, enhance photosynthesis efficiency, improve the absorption and utilization rate of CO2 in the water body, further promote EPS formation, and stabilize microalgae aggregation.

[0052] After the water reaches the top of the first guide tube 2, it splits and flows to either side. The water then overflows from the first guide tube 2 and is collected by the second guide tube 3, which guides it along the inner wall of the tank 1, forming an axial, downward outer ring return flow. This, combined with the main upward flow in the first guide tube 2, forms an inner and outer ring water circuit. Smaller particles and unagglomerated algae in the return flow are redirected to the main circulation area, while larger particles, due to inertial sedimentation or controlled by flow velocity, remain at the bottom and re-enter the ascending channel of the first guide tube 2, completing the "collision-screening-enrichment" cycle.

[0053] The microalgae particle culture device for carbon capture in this embodiment includes a tank body 1, a first flow guide tube 2 and a second flow guide tube 3, wherein the tank body 1 is provided with a bottom water inlet pipe 11 and an upper peripheral overflow port 12, the first flow guide tube 2 is arranged in the middle of the tank body 1, and its bottom is opposite to the water outlet of the water inlet pipe 11, and a flow gap is left between it and the bottom of the tank body 1; the second flow guide tube 3 is fixedly connected to the top wall of the tank body 1, and extends downward to be arranged to be sleeved on the top periphery of the first flow guide tube 2, and a flow gap is formed between it and the inner wall of the tank body 1 and the outer wall of the first flow guide tube 2; wherein, at least one of the tank body 1, the first flow guide tube 2 or the second flow guide tube 3 adopts a double shell structure, and the double shell is composed of an inner and outer shell, and a number of lighting components 52 are arranged in the annular chamber 5 therebetween. In this embodiment, the second guide tube 3 extends downward from the top wall of the tank body 1, and its bottom surrounds the outer periphery of the top of the first guide tube 2. A flow gap is provided between the outer wall of the second guide tube 3 and the inner wall of the tank body 1, and between the inner wall and the first guide tube 2, forming a surrounding recirculation channel. This stabilizes the microalgae growth environment, suppresses turbulent interference, and further promotes particle formation. The construction of the fluid path from the bottom of the tank body 1 to the center of the first guide tube 2 keeps the microalgae in a suspended flow state and facilitates particle formation. At the same time, the flow gap effectively induces the fluid to form a low-speed recirculation zone in a specific area, which is conducive to particle aggregation and deposition, facilitating centralized harvesting. Furthermore, the annular lighting assembly 52 in the double-shell structure provides internal directional supplemental lighting, enhancing light penetration and distribution uniformity, significantly improving the photosynthesis efficiency of the microalgae, and enhancing the absorption and utilization rate of CO2 in the water, thereby achieving efficient carbon capture and fixation. It also further promotes particle formation and stable growth, ultimately achieving efficient microalgae pellet cultivation, convenient harvesting, and the carbon capture and restoration effects on the ocean.

[0054] In some embodiments, as Figure 1 and Figure 2 As shown, a plurality of annular mounting grooves 51 are arranged along the axial direction in the annular chamber 5 , and a group of the lighting components 52 is disposed in each of the annular mounting grooves 51 .

[0055] For example, each annular mounting groove 51 may have a U-shaped, semicircular, or rectangular groove structure to ensure that the lighting unit can be securely inserted. The lighting assembly 52 may be fixedly connected to the annular mounting groove 51 using an elastic snap-fit structure to facilitate future maintenance and replacement. In addition, to enhance the sealing and long-term stability of the device, a threaded engagement with an O-ring seal may be used to securely install the lighting assembly 52 in the annular mounting groove 51.

[0056] For example, the power supply line for the lighting assembly 52 can be routed along the outer shell 5b of the first guide tube 2 and led out through the side wall of the tank 1. Furthermore, to ensure the watertightness and durability of the device, all cabling should adopt a fully sealed and waterproof design, or directly use passive fiber optic lighting technology instead of traditional cable solutions to effectively avoid safety hazards caused by connector aging and wire corrosion.

[0057] For example, the lighting assembly 52 can be arranged in groups at regular intervals based on the total height of the tank 1 and the required light intensity. Each lighting assembly 52 can use a 360° ring-shaped LED module to provide uniform circumferential lighting. Alternatively, an inward-facing directional light source strip combined with a diffuser design can be used to achieve a combination of concentrated lighting and anti-glare diffusion.

[0058] Furthermore, to enhance system stability and heat dissipation capability, thermally conductive silicone or encapsulated optical colloid may be injected between the lighting assembly 52 and the annular mounting groove 51 to allow heat to be transferred to the exterior of the outer shell 5 b more quickly.

[0059] In this embodiment, the annular chamber 5 is provided with a plurality of annular mounting grooves 51 arranged along its axial direction. Each annular mounting groove 51 houses a set of lighting assemblies 52, each securely embedded within its corresponding mounting groove. This embodiment utilizes the annular mounting grooves 51 to arrange the lighting assemblies 52 in a layered, multi-level, and regular manner along the axial direction of the annular chamber 5. This effectively achieves uniform distribution and directional positioning of the lighting assemblies 52, preventing displacement or dislodging of the lighting assemblies 52 due to fluid disturbances or prolonged operation. Furthermore, it facilitates the placement of the light source closer to the primary microalgae growth area, thereby improving light utilization.

[0060] In some embodiments, as Figure 1 、 Figure 2 and Figure 4 As shown, a flow guiding member 4 is further provided above the top of the first flow guiding tube 2. The flow guiding member 4 is located below the overflow port 12 and has a flow gap with the top of the first flow guiding tube 2.

[0061] The flow guide member 4 includes an upper conical surface 41 and a lower conical surface 42 connected along the axial direction, and the upper conical surface 41 is located above the lower conical surface 42;

[0062] The upper conical surface 41 and the lower conical surface 42 are both conical structures. The inner diameter of the upper conical surface 41 gradually shrinks from bottom to top along the axial direction of the tank body 1; the inner diameter of the lower conical surface 42 gradually increases from bottom to top along the axial direction of the tank body 1; the lower conical angle 421 of the lower conical surface 42 is smaller than the upper conical angle 412 of the upper conical surface 41.

[0063] For example, a flow guide member 4 is provided at the top of the first flow guide tube 2, below the overflow port 12, to adjust the speed and direction of water entering the peripheral channel, enhancing the flow shear and particle screening functions at the top. The flow guide member 4 can be designed as a conical structure, which can both guide the water flow to slowly rise along the wall of the second flow guide tube 3 and prevent particles from gathering at the top or being disturbed by bubbles and reeling back. The second flow guide tube 3 is mounted on the periphery of the first flow guide tube 2, with an annular flow gap maintained between the bottom and the tank body 1. This serves to guide overflow and screen backflow, creating an outer loop return path for the system, which facilitates the re-entry of unparticled algae into the main circulation area.

[0064] In the aforementioned water circulation, once the water reaches the top of the first guide tube 2, it is blocked and diverted by the top-mounted guide member 4, where it then flows to either side. This slows the flow rate, prolonging the residence time of the microalgae at the top and preventing immature particles from escaping directly with the water flow. Furthermore, the tapered angle of the guide member 4, which blocks and diverts the water, also induces localized rotational flow, enhancing the shear effect at the top, causing the microalgae particles to reaggregate and be filtered at the top.

[0065] For example, the flow guide member 4 utilizes a diamond-shaped structure composed of upper and lower conical surfaces 42, forming a streamlined, symmetrical body with a central axis, resembling a spindle or hourglass. It combines multiple functions, including flow concentration, flow diversion, flow stabilization, and particle screening. Within the microalgae particle cultivation system, it is positioned between the top of the first flow guide tube 2 and the overflow port 12, located at the axis of the flow, and serves as a key node connecting the main upflow and the outer loop return flow.

[0066] For example, when the water gradually rises and enters the interior of the second guide tube 3, the upper conical surface 41 can guide and stabilize its rising flow to prevent fluid diffusion instability; and when part of the water forms a downward trend in the second guide tube 3, the upper cone angle 412 structure of the upper conical surface 41 can block and disperse the downward water flow, guiding it to slide along the surface of the upper conical surface 41, and through the flow gap between the upper conical surface 41 and the inner wall of the second guide tube 3, divert it into the flow gap area between the first guide tube 2 and the second guide tube 3, thereby realizing the backflow and recirculation of part of the water and microalgae particles.

[0067] For example, the lower edge of the lower conical surface 42 is not connected to any structure. Instead, there is a flow gap between the first guide tube 2 and the second guide tube 3, resulting in a suspended arrangement. This "suspended" arrangement allows water or particles to bypass the edge of the lower conical surface 42, flow underneath it, or fall back to the bottom area, thereby forming a slow-speed transition zone below the guide member 4. This not only reduces disturbances during the top backflow process, but also provides a buffer space for particle settling and backflow.

[0068] Exemplarily, the flow-guiding member 4 has a diamond-shaped structure, consisting of an upper conical surface 41 with a larger cone angle and a lower conical surface 42 with a smaller cone angle, with a naturally transitional waist region formed between the upper conical surface 41 and the lower conical surface 42. Optionally, the upper conical surface 41 has an upper cone angle 412 ranging from 135° to 180°, with a height-to-diameter ratio of approximately 1:2; the lower conical surface 42 has a lower cone angle 421 ranging from 90° to 135°, with a height-to-diameter ratio of approximately 1:3.

[0069] For example, the upper cone 41 has a larger upper angle 412 and a more open shape, while the lower cone 42 has a smaller lower angle 421 and a more pointed shape, forming an asymmetrical cone combination. Specifically, the upper cone 41 features a larger angle. Its open profile forces the water below to converge toward the center when it overflows and rises, then flows back into the flow gap between the second guide tube 3 and the first guide tube 2. The lower cone 42, with its smaller angle and pointed shape, guides the water flow, allowing the diverted water to diffuse smoothly to both sides, avoiding disturbances and thus maintaining the stability of the water circulation.

[0070] For example, the flow-guiding member 4 can be secured to the top of the tank 1 or the inner wall of the second flow-guiding tube 3 via a three-point top suspension, radial arms, or central axis anchoring, maintaining vertical coaxial stability. It should be noted that during installation, reasonable flow clearances must be maintained between the flow-guiding member 4 and the top of the first flow-guiding tube 2 and the inner wall of the second flow-guiding tube 3, respectively, to ensure a continuous and smooth flow transition and avoid turbulent dead zones.

[0071] In addition, the guide member 4 can be made by one-piece injection molding or upper and lower splicing and welding. The material can be transparent polycarbonate, acrylic or polypropylene, etc., which have the characteristics of corrosion resistance, high strength, and strong visibility. It is recommended to make its surface into a mirror or matte treatment to prevent algae adhesion and light interference.

[0072] In this embodiment, the flow-guiding member 4 comprises an upper conical surface 41 and a lower conical surface 42, connected in sequence along the axial direction of the tank body 1. The upper conical surface 41 is located above the lower conical surface 42, forming an overall diamond-shaped flow-guiding structure. Through the combination of the upper conical surface 41 and the lower conical surface 42, this embodiment enables smooth diversion and centralized guidance of water flow around the flow-guiding member 4, avoiding fluid turbulence, effectively preventing unformed particles from being prematurely swept away, and improving particle return efficiency, thereby optimizing particle settling performance.

[0073] In some embodiments, as Figure 5 and Figure 6 As shown, the top of the first guide tube 2 is connected to a third guide cover 22 whose diameter gradually shrinks from bottom to top along the axial direction of the tank body 1, and there is a flow gap between the outer wall of the third guide cover 22 and the inner wall of the second guide tube 3.

[0074] For example, the third flow guide 22 is installed on the top of the first flow guide tube 2, and is in the shape of an inverted funnel with a reduced diameter. It has the dual functions of rectification and gas-liquid separation. In terms of rectification, the third flow guide 22 can change the flow direction of the top fluid, guide the rising water flow in the center and evenly distribute it to the outer flow gap, thereby forming a stable annular outflow channel. In terms of gas-liquid separation, the third flow guide 22 can prevent tiny bubbles from escaping directly with the fluid, and promote the collision and aggregation of tiny bubbles to form large bubbles. Under the action of buoyancy, they are easily discharged from the exhaust device at the top of the tank body 1, preventing the loss of microalgae particles entrained by microbubbles.

[0075] Compared to the aforementioned installation of the third flow guide 22, without the third flow guide 22, the top of the first flow guide tube 2 will be directly connected to the fluid channel within the second flow guide tube 3. After the fluid rises to the top of the first flow guide tube 2, it will lack an effective contraction and rectification structure, resulting in disordered water diffusion and turbulence, making it difficult to evenly distribute the water flow to the flow gap between the second flow guide tube 3 and the first flow guide tube 2. At the same time, due to the lack of contraction and diversion, the tiny bubbles generated by the aeration disk 6 will directly escape with the fluid flow and cannot aggregate into large bubbles for discharge. Furthermore, a large number of tiny bubbles will carry microalgae particles with them, flowing through the flow gap with the fluid, first through the flow gap between the first flow guide tube 2 and the second flow guide tube 3, and then through the flow gap between the second flow guide tube 3 and the tank body 1, and finally to the outside world, resulting in the loss of microalgae particles and reducing the retention rate and granulation efficiency of the microalgae particles.

[0076] For example, the lower end of the third shroud 22 can be securely connected to the top of the first shroud 2 via flanges, threads, or welding to ensure airtightness and structural stability. An annular flow gap is formed between its outer wall and the inner wall of the second shroud 3. The gap width must be precisely designed based on system flow, bubble size, and anti-clogging requirements. Furthermore, reinforcing ribs or an inner lining ring can be installed at the bottom connection area of the third shroud 22 to enhance structural strength and prevent fatigue damage at the connection due to long-term fluid impact.

[0077] For example, the curvature radius of the constricted inner diameter portion of the third shroud 22 should adopt a continuous, smooth transition design to prevent fluid separation and turbulence, thereby improving rectification efficiency. Materials can include PVC-U, PP, FRP (fiberglass reinforced plastic), or, in high-salt corrosive environments, SUS316L stainless steel. The inner surface can be coated with an anti-adhesion coating to reduce the adhesion of microalgae or bubbles. Furthermore, if the third shroud 22 is made of a non-transparent material, a detection port or transparent observation window can be reserved to facilitate operational status monitoring and maintenance.

[0078] In this embodiment, a third flow guide hood 22 is provided to connect with the first flow guide tube 2 to form a top contraction area, guiding the fluid to rise and rectify it; at the same time, it cooperates with the second flow guide tube 3 to form a stable annular flow gap between its outer wall and inner wall to achieve uniform outflow; in addition, the third flow guide hood 22 can also promote small bubbles to aggregate into large bubbles, effectively avoiding the entrainment and loss of particles.

[0079] In some embodiments, as Figure 1 、 Figure 2 and Figure 5 As shown, the bottom of the second guide tube 3 is connected to a second guide cover 31 with an outwardly expanded diameter. The second guide cover 31 includes an extension section 312 and an expansion section 311 that are sequentially connected from bottom to top along the axial direction of the tank body 1.

[0080] The inner diameter of the expansion section 311 gradually increases from top to bottom along the axial direction of the tank body 1, and one end of its upper portion is connected to the bottom of the second guide tube 3, and one end of its bottom portion is connected to the extension section 312;

[0081] At least a portion of the extension section 312 is sleeved between the first flow guide tube 2 and the tank body 1 , and a flow gap exists between the first flow guide tube 2 and the tank body 1 .

[0082] For example, the second flow guide hood 31 is mounted at the bottom of the second flow guide tube 3. It primarily consists of an upper expansion section 311 and a lower extension section 312. It is a key flow guide component in the microalgae reactor, connecting the main reaction zone with the bottom circulation channel. The expansion section 311 is a trumpet-shaped structure, with a gradually increasing inner diameter from top to bottom. It is circumferentially connected to the bottom of the second flow guide tube 3, and a stable connection can be achieved through sealing welding, snap fastening, or screw fastening. This structure effectively diffuses the backflow from top to bottom, slowing its flow rate and buffering turbulence, preventing the fluid from rushing directly to the bottom, and helping larger particles settle and remain in the system.

[0083] For example, the expansion section 311 is connected to an extension section 312 below. This cylindrical extension section 312 is positioned from top to bottom within the annular space between the outer side of the first guide tube 2 and the inner wall of the tank body 1, forming a channel for the water to converge toward the bottom. It does not directly contact the surrounding structure, but maintains a certain annular gap between the inner wall of the tank body 1 and the first guide tube 2. This allows the water to continue flowing downward after slow diffusion and rejoin the main ascending channel at the bottom, thus forming a complete hydraulic closed loop of "diffusion-return-bottom recovery-ascent cycle."

[0084] For example, the expansion section 311 and the extension section 312 can be connected by plug-in connection or step-lap connection, or can be blow-molded as a whole. The material can be transparent polycarbonate, polypropylene or acrylic plastic to ensure good salt corrosion resistance, mechanical strength and visual observation capability.

[0085] In this embodiment, a second flow guide cover 31 consisting of an expansion section 311 and an extension section 312 is provided at the bottom of the second flow guide tube 3, which not only effectively expands the lower flow guide area and enhances the fluid guidance coverage, but also the trumpet-shaped structure of the expansion section 311 is conducive to slowing down the outflow speed, smoothly transitioning the flow state, and suppressing the generation of eddies and turbulence; the extension section 312 partially covers the first flow guide tube 2 to form an annular buffer flow channel, so that the upper and lower circulating water bodies can return more smoothly around the periphery of the second flow guide cover 31, thereby improving the particle suspension and sedimentation control capabilities and enhancing the overall flow field stability and reaction efficiency of the system.

[0086] In some embodiments, as Figure 1 、 Figure 2 and Figure 5 As shown, a first flow guide cover 21 with an outwardly expanded diameter is connected to the bottom of the first flow guide tube 2 , and there are flow gaps between the edge of the bottom of the first flow guide cover 21 and the inner wall and side wall of the bottom of the tank body 1 .

[0087] Among them, the first flow guide cover 21 is a trumpet shape with a gradually expanding diameter, and there is a flow gap between the bottom edge of the first flow guide cover 21 and the inner wall and side wall of the tank body 1. The setting of the first flow guide cover 21 reduces the flow gap between the first flow guide tube 2 and the inner wall and side wall of the tank body 1, which is more conducive to the water entering the first flow guide tube 2 through the first flow guide cover 21, that is, it is more conducive to circulation.

[0088] This embodiment effectively expands the diversion range through the outward expansion structure of the first guide cover 21, promoting the uniform distribution of the fluid in the bottom area; at the same time, the flow gap between the bottom edge and the inner wall and side wall of the tank body 1 provides a smooth reflux channel for the water flow, reducing the formation of dead corners and stagnant areas, thereby optimizing the flow field circulation and improving the particle suspension and sedimentation effects.

[0089] In some embodiments, as Figure 1 、 Figure 2 and Figure 5 As shown, the tank body 1 includes a culture section 1a and an overflow section 1b connected sequentially from bottom to top, and the inner diameter of the culture section 1a is less than or equal to the inner diameter of the overflow section 1b; the first guide tube 2 is located in the culture section 1a, and the bottom of the second guide tube 3 is located in the culture section 1a, and the top thereof is located in the overflow section 1b.

[0090] For example, the connection between the culture section 1a and the overflow section 1b must not only ensure a tight seal but also be designed with a streamlined transition structure to prevent water separation and turbulence, thereby maintaining a stable and smooth water flow. The first flow guide 2 is tightly mounted within the culture section 1a, coaxially arranged with the tank body 1 along its axis. A reasonable flow clearance is maintained between the first flow guide 2 and the inner wall of the tank body 1 to prevent the formation of localized dead water zones and ensure uniform water flow throughout the culture area, promoting the stable suspension and growth of the microalgae particles.

[0091] For example, the bottom portion of the second guide tube 3 is positioned in the upper middle portion of the culture section 1a, with its top extending beyond the culture section 1a into the overflow section 1b. It is securely attached to the top wall of the overflow section 1b using a rigid connection or elastic fixing structure to ensure accurate positioning and prevent structural shifting. It is important to note that the first guide tube 2 and the second guide tube remain substantially coaxial along their axes to ensure a smooth transition of water flow from the culture section 1a to the overflow section 1b, forming an efficient and stable water circulation channel.

[0092] For example, the inner diameter of the culture section 1a can be designed based on the maximum size of the microalgae particles and the expected water flow rate, typically maintaining a relatively compact structure. The inner diameter of the overflow section 1b can be 20% to 50% larger than that of the culture section 1a, creating a buffer zone to effectively reduce turbulence and disturbance during drainage.

[0093] In this embodiment, the tank body 1 comprises a cultivation section 1a and an overflow section 1b, connected sequentially from bottom to top. The inner diameter of the cultivation section 1a is equal to or smaller than that of the overflow section 1b. In this embodiment, the smaller inner diameter of the cultivation section 1a restricts the fluid space, enhancing the flow rate and shear force within the cultivation area, thus facilitating the suspension and uniform cultivation of microalgae particles. The larger inner diameter of the overflow section 1b provides ample diffusion space for the upper water column, effectively slowing the flow rate and preventing particles from overflowing with the water flow, thereby improving the cultivation efficiency and stability of the system.

[0094] In some embodiments, as Figure 1 、 Figure 2 and Figure 5 As shown, at least part of the top of the culture section 1a is inserted into the overflow section 1b to form an overflow weir 13; the overflow weir 13, the inner bottom wall of the overflow section 1b and the inner side wall of the overflow section 1b are combined to form an overflow trough 14, and the overflow trough 14 is connected to the overflow port 12.

[0095] For example, the insertion portion between the top of the culture section 1a and the inner wall of the overflow section 1b needs to be seamlessly connected or have a sealed structure to effectively prevent water leakage.

[0096] The overflow weir 13 forms a fixed and dimensionally stable annular drainage weir relative to the inner wall of the overflow section 1b. When water flows up from the flow gap between the second guide tube 3 and the inner wall of the tank body 1, the water can flow evenly into the overflow trough 14, avoiding uneven or chaotic overflow caused by excessive local water flow.

[0097] The bottom wall of the overflow trough 14 should be flush with or slightly raised from the bottom wall of the overflow section 1b to ensure smooth water flow and low flow resistance. The overflow trough 14 and the overflow port 12 are connected by a seal or flange to further ensure the airtightness and safety of the drainage system.

[0098] For example, the overflow trough 14 can be designed with a trapezoidal or arc-shaped cross-section, which facilitates smooth water discharge while reducing flow resistance and eddy currents. Furthermore, the walls of the overflow trough 14 can be coated with anti-corrosion and anti-adhesion coatings to effectively reduce microalgae adhesion and the risk of clogging. The size of the overflow port 12 should be determined based on the system's maximum design flow rate to ensure smooth and efficient wastewater discharge. Furthermore, a protective net can be installed at the overflow port 12 to prevent debris from entering and causing clogging.

[0099] In this embodiment, the overflow weir 13 and the overflow trough 14 cooperate with each other to achieve effective liquid level separation and control between the culture section 1a and the overflow section 1b; at the same time, the overflow trough 14 serves as a buffer zone to guide excess liquid to flow in an orderly manner to the overflow port 12, ensuring a smooth and uniform overflow process, reducing liquid disturbance and particle loss, and improving the system's liquid management efficiency and the stability of the culture environment.

[0100] In some embodiments, as Figure 1 、 Figure 2 and Figure 5 As shown, an aeration plate 6 is further provided at the bottom of the tank body 1 , and the aeration plate 6 is connected to the air inlet pipe 61 .

[0101] For example, aeration disc 6 can be fixedly mounted in the center of the bottom of tank 1 or evenly spaced on brackets at the bottom of tank 1 to ensure a secure position and even distribution of bubbles throughout the water. Aeration disc 6 is connected to inlet pipe 61 via a sealed interface. This connection must be airtight to prevent gas leakage. Possible connection methods include flanges, snap-fit connections, or welding to facilitate later disassembly and maintenance.

[0102] For example, the material of the air inlet pipe 61 needs to be corrosion-resistant and suitable for long-term underwater use. Common materials include PVC and stainless steel.

[0103] In addition, the air inlet pipe 61 may be equipped with a flow regulating valve and a filtering device to prevent impurities from entering and affecting the aeration effect.

[0104] In this embodiment, an aeration plate 6 is provided to allow the gas to diffuse evenly throughout the entire internal space of the tank body 1, which not only significantly increases the dissolved oxygen content in the reactor and promotes the photosynthesis and growth of microalgae, but also maintains the suspended state of the microalgae particles and prevents the particles from settling and accumulating.

[0105] In some embodiments, as Figure 1 、 Figure 2 、 Figure 3 and Figure 5 As shown, the bottom and / or top of the tank body 1 is provided with an inspection hole 7.

[0106] For example, the inspection hole 7 can be provided with a structure having a removable cover, which can be fixed with bolts, quick-open buckles or screw-on locking methods, thereby ensuring good sealing and facilitating quick opening by maintenance personnel.

[0107] The diameter of the inspection hole 7 is usually not less than the inner diameter of the second guide tube 3 to meet the requirements of safe inspection.

[0108] A rubber seal should be installed at the interface between the cover and the tank 1 to ensure airtightness and watertightness during operation, effectively preventing leakage. In addition, the location of the inspection hole 7 should be selected appropriately, avoiding the main fluid path and key structures to avoid adverse effects on water circulation and the microalgae cultivation environment.

[0109] For example, the material of the cover of the inspection hole 7 should match the tank body 1, and can be made of stainless steel or corrosion-resistant plastic; in addition, the cover can also be equipped with a safety locking device and waterproof and dustproof measures to ensure safe operation and sealing effect.

[0110] In this embodiment, the inspection hole 7 is provided to facilitate regular inspection, maintenance and cleaning of the internal structure and equipment of the tank body 1, thereby improving the maintainability and operational reliability of the system and ensuring long-term stable operation.

[0111] Based on the same inventive concept, the present application also provides a microalgae particle cultivation system, comprising any of the above-described microalgae particle culture devices for carbon capture.

[0112] The beneficial effects of the microalgae particle cultivation system are the same as those of the microalgae particle cultivation device for carbon capture in the above embodiment, and will not be described in detail.

[0113] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. Within the scope of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0114] In addition, for simplicity of description and discussion, and in order not to make the embodiment of the application difficult to understand, the known power supply / ground connection with integrated circuit (IC) chip and other components may or may not be shown in the accompanying drawings provided. In addition, the device can be shown in the form of a block diagram to avoid making the embodiment of the application difficult to understand, and this also takes into account the following fact, that is, the details of the embodiment of these block diagram devices are highly dependent on the platform to be implemented in the embodiment of the application (that is, these details should be fully within the scope of understanding of those skilled in the art). When specific details (for example, circuit) are set forth to describe exemplary embodiments of the application, it will be apparent to those skilled in the art that the embodiment of the application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0115] Although the present invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those skilled in the art based on the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may utilize the embodiments discussed.

[0116] The embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of this application.

Claims

1. A microalgae particle culture device for carbon capture, characterized in that: include: The tank body includes a water inlet pipe and an overflow port, wherein the water inlet pipe is located at the bottom of the tank body and the overflow port is located at the outer periphery of the upper portion of the tank body; a first guide tube coaxially disposed in the middle of the tank body; a bottom of the first guide tube is disposed opposite to the water outlet of the water inlet pipe, and a flow gap is provided between the first guide tube and the bottom of the tank body; a second flow guide tube coaxially disposed in the upper portion of the tank body, with its top fixedly connected to the top wall of the tank body, and its bottom sleeved around the top periphery of the first flow guide tube, with a flow gap between it and the inner wall of the tank body; at least a portion of the first flow guide tube is located in the fluid passage of the second flow guide tube, with a flow gap between it and the inner wall of the second flow guide tube; Among them, at least one of the first guide tube, the second guide tube and the tank body is a double shell structure; the double shell structure includes an outer shell and an inner shell, which together form an annular chamber, and a plurality of lighting components are arranged in the annular chamber.

2. The microalgae particle culture device for carbon capture according to claim 1, characterized in that: A plurality of annular mounting grooves are arranged in the annular chamber along its axial direction, and a group of the lighting components is arranged in each of the annular mounting grooves.

3. The microalgae particle culture device for carbon capture according to claim 1, characterized in that: A flow guide member is further provided above the top of the first flow guide tube. The flow guide member is located below the overflow port and has a flow gap with the top of the first flow guide tube. The flow guide member comprises an upper conical surface and a lower conical surface connected along the axial direction, wherein the upper conical surface is located above the lower conical surface; The upper and lower conical surfaces are both conical structures. The inner diameter of the upper conical surface gradually shrinks from bottom to top along the axial direction of the tank body; the inner diameter of the lower conical surface gradually increases from bottom to top along the axial direction of the tank body; the lower cone angle of the lower cone surface is smaller than the upper cone angle of the upper cone surface.

4. The microalgae particle culture device for carbon capture according to claim 1, characterized in that: The top of the first flow guide tube is connected to a third flow guide cover whose diameter gradually shrinks from bottom to top along the axial direction of the tank body. A flow gap exists between the outer wall of the third flow guide cover and the inner wall of the second flow guide tube.

5. The microalgae particle culture device for carbon capture according to any one of claims 1 to 4, characterized in that: The bottom of the second guide tube is connected to a second guide cover with an outwardly expanded diameter, and the second guide cover includes an extension section and an expansion section connected in sequence from bottom to top along the axial direction of the tank body; The inner diameter of the expansion section gradually increases from top to bottom along the axial direction of the tank body, one end of the upper portion is connected to the bottom of the second guide tube, and one end of the bottom portion is connected to the extension section; At least part of the extension section is sleeved between the first flow guide tube and the tank body, and a flow gap exists between the first flow guide tube and the tank body.

6. The microalgae particle culture device for carbon capture according to claim 5, characterized in that: The bottom of the first flow guide tube is connected to a first flow guide cover with an outwardly expanded diameter, and there are flow gaps between the edge of the bottom of the first flow guide cover and the inner wall and side wall of the bottom of the tank body.

7. The microalgae particle culture device for carbon capture according to claim 1, characterized in that: The tank body includes a culture section and an overflow section connected sequentially from bottom to top, and the inner diameter of the culture section is less than or equal to the inner diameter of the overflow section; the first guide tube is located in the culture section, and the bottom of the second guide tube is located in the culture section, and the top thereof is located in the overflow section.

8. The microalgae particle culture device for carbon capture according to claim 7, characterized in that: At least part of the top of the culture section is inserted into the overflow section to form an overflow weir; the overflow weir, the bottom wall of the overflow section and the inner side wall of the overflow section together form an overflow trough, and the overflow trough is connected to the overflow port.

9. The microalgae particle culture device for carbon capture according to claim 1, characterized in that: An aeration plate is also provided at the bottom of the tank body, and the aeration plate is communicated with the air inlet pipe.

10. A microalgae particle cultivation system, characterized in that: A microalgae particle culture device for carbon capture comprising any one of claims 1 to 9.

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