Low-temperature diatom expansion pond

Abstract

The utility model discloses a kind of diatom low-temperature expansion culture pools, including expansion culture pool main body, the inner wall middle part of expansion culture pool main body is equipped with flow guide wall, to form closed circulation flow channel in pool, the inner wall bottom of expansion culture pool main body is provided with at least one light-transmitting cover, light-transmitting cover is provided with light emitting unit in;Light collecting device is installed on expansion culture pool main body by mounting bracket, light collecting device is connected with light emitting unit by light guide element, for the external light of collection is conducted to the light emitting unit.The utility model is through bottom lighting system and low shear force circulating flow system cooperation, light irradiates from pool bottom upwards, overcome traditional top illumination's algal liquid self-shielding and deep layer insufficient illumination problem, realize culture liquid depth direction illumination uniform, improve light energy utilization rate;And light-transmitting cover is arranged along closed circulation flow channel, illumination full covers algal liquid movement path, there is no illumination blind area, ensure that algal cell periodic uniform light, promote photosynthesis efficiency.

Description

Technical Field

[0001] This utility model mainly relates to the field of diatom cultivation technology, specifically a diatom low-temperature expansion culture tank. Background Technology

[0002] Diatoms, as important aquatic microalgae, have broad application prospects in aquaculture, environmental monitoring, bioenergy, and the development of high-value-added products (such as DHA and fucoxanthin). Achieving efficient and large-scale cultivation of diatoms is a key foundation for these applications.

[0003] Currently, low-temperature diatom cultivation often employs open raceway ponds or closed photobioreactors, with the cultivation process taking place in temperature- and humidity-controlled greenhouses. However, traditional cultivation systems typically rely on top natural lighting or artificial illumination, requiring light to penetrate the surface of the algal solution to reach deeper layers. As algal cell density increases, the shading effect of surface cells becomes increasingly pronounced, leading to severe insufficient light penetration into the deeper layers of the culture medium, significantly limiting overall light energy utilization efficiency and the improvement of algal cell density. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing technologies are too simplistic. It mainly provides a low-temperature diatom propagation tank to solve the problem mentioned in the background that the traditional top lighting method in diatom cultivation is prone to insufficient light intensity in the deep layers due to the self-shading effect of the algal solution, which limits the cultivation efficiency.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A low-temperature diatom propagation tank includes a main body of the propagation tank. A flow guide wall is provided in the middle of the inner wall of the main body of the propagation tank to form a closed circulation channel. At least one light-transmitting cover is provided at the bottom of the inner wall of the main body of the propagation tank, and a light-emitting unit is provided inside the light-transmitting cover. A light-collecting device is installed on the main body of the propagation tank through a mounting frame. The light-collecting device is connected to the light-emitting unit through a light guide element to conduct the collected external light to the light-emitting unit, thereby providing illumination to the interior of the main body of the propagation tank, thus forming an internal lighting system from the bottom of the tank upward.

[0006] More preferably, there are multiple light-transmitting covers, which are arranged along the trajectory of the closed circulation channel at the bottom of the inner wall of the expansion tank body; the multiple light-transmitting covers form a flow channel for fluid to pass through.

[0007] More preferably, the light-transmitting cover is integrally molded from high-transmittance PC material, and the outer wall of the light-transmitting cover is provided with an anti-fog coating, and the inner wall is provided with an anti-algae adhesion coating.

[0008] More preferably, the main body of the expansion tank has a connecting channel, and a connecting pipe is sealed and installed at the connecting channel. The light guide element is sealed and installed inside the connecting channel and the connecting pipe to realize the light transmission connection between the light collection device and the light-emitting unit in the light-transmitting cover. The light collection device is a condensing lens or a solar tracker with a condensing lens. The solar tracker can be adjusted in both horizontal and vertical directions to track the incident direction of the light source.

[0009] More preferably, the light-emitting unit is a light guide strip or an LED light strip; and / or, the light guide element is an optical fiber.

[0010] Further preferably, the system also includes a drive mechanism and a stirring mechanism. The stirring mechanism includes a rotating shaft rotatably mounted inside the main body of the expansion tank, and multiple push plates mounted on the outer peripheral wall of the rotating shaft via multiple connecting rods. The multiple push plates are evenly distributed in a ring around the axis of the rotating shaft. The drive mechanism is mounted on the outer side wall of the main body of the expansion tank. The drive mechanism is a stepper motor or a servo motor, and its output shaft is connected to the rotating shaft via a coupling. A seal is provided at the connection between the output shaft and the main body of the expansion tank. The drive mechanism is used to drive the push plates to rotate, so as to push the algal liquid to make a closed-loop motion along the elliptical racetrack-type reflux channel.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This expansion culture tank utilizes a bottom lighting system and a low-shear circulation system to guide light upwards from the bottom, ensuring that algal cells receive direct and sufficient illumination as they flow through the bottom. This overcomes the problem of insufficient deep-layer illumination caused by the self-shading effect of algal solution in traditional top lighting, achieving uniform light distribution along the depth of the culture medium and improving light energy utilization efficiency. Furthermore, multiple light-transmitting covers are strictly arranged along the closed circulation channel trajectory to ensure that the illumination area fully covers the movement path of the algal solution. This ensures a high degree of spatial alignment between light energy supply and algal cell flow trajectory, avoiding blind spots and guaranteeing that all algal cells can periodically and repeatedly receive uniform illumination, thereby promoting photosynthetic efficiency.

[0012] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a top view of the main structure of the expansion tank of this utility model; Figure 3 This is a schematic diagram of the full cross-sectional structure of the expansion tank of this utility model.

[0014] Numbering on the map: 1. Main body of the expansion tank; 101. Guide wall; 102. Light-transmitting cover; 103. Connecting channel; 2. Mounting frame; 3. Connecting pipe; 4. Light collecting device; 5. Rotating shaft; 6. Push plate. Detailed Implementation

[0015] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0016] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0017] Please refer to the appendix carefully. Figures 1-3 A diatom low-temperature expansion tank includes an expansion tank body 1. A flow guide wall 101 is provided in the middle of the inner wall of the expansion tank body 1 to form a closed circulation channel. At least one light-transmitting cover 102 is provided at the bottom of the inner wall of the expansion tank body 1, and a light-emitting unit is provided inside the light-transmitting cover 102. A light-collecting device 4 is installed on the expansion tank body 1 through a mounting frame 2. The light-collecting device 4 is connected to the light-emitting unit through a light guide element to conduct the collected external light to the light-emitting unit, thereby providing illumination to the interior of the expansion tank body 1, thus forming an internal lighting system from the bottom of the tank upward.

[0018] The main body of the expansion tank 1 has an inlet valve on one side near the top and a drain valve on the other side near the bottom.

[0019] In this embodiment, as Figure 2 and Figure 3 As shown, there are multiple light-transmitting covers 102, which are arranged along the trajectory of a closed circulation channel at the bottom of the inner wall of the expansion tank body 1; a flow channel for fluid to pass through is formed between the multiple light-transmitting covers 102.

[0020] The above structure ensures that the light coverage area and the core flow path of the algal solution highly overlap, allowing the algal cells to receive light from the light-transmitting cover 102 repeatedly and evenly during the circulation process, thereby improving the light energy utilization efficiency and light uniformity. The flow channel formed between multiple light-transmitting covers 102 can ensure that the culture solution can flow smoothly and without obstruction at the bottom of the pool, avoiding flow dead zones caused by the lighting structure.

[0021] In this embodiment, as Figure 3 As shown, the light-transmitting cover 102 is integrally molded from high-transmittance PC material, and the outer wall of the light-transmitting cover 102 is provided with an anti-fog coating, and the inner wall is provided with an anti-algae adhesion coating. The anti-fog coating is a silica nano-coating, and the anti-algae adhesion coating is a fluoropolymer coating.

[0022] Through the above structure, the high-transmittance PC material is integrally molded, which achieves the highest light transmittance while ensuring structural strength and sealing, minimizing the loss of light source energy. The anti-fog coating on the outside can prevent fogging caused by condensation on the outside of the cover wall due to the temperature difference between the inside and outside of the pool, ensuring the continuous clarity of the light-transmitting surface and the stability of light transmittance. The anti-algae coating on the inside can inhibit the reverse growth of algae on the inner wall of the cover, prevent the reduction of lighting efficiency caused by algae blocking light, reduce the maintenance frequency, and ensure the long-term stability of the system.

[0023] In this embodiment, as Figure 1 and Figure 2 As shown, a connecting pipe 3 is sealed and installed at the connecting channel 103. The light guide element is sealed and installed inside the connecting channel 103 and the connecting pipe 3 to realize the light transmission connection between the light collection device 4 and the light-emitting unit inside the light-transmitting cover 102. The light collection device 4 is a condensing lens or a solar tracker with a condensing lens. The solar tracker can adjust the angle in the horizontal and vertical directions to track the incident direction of the light source.

[0024] With the above structure, a condenser lens or a solar tracker is used as the light collection device 4. In particular, a solar tracker that can be adjusted horizontally and vertically can maximize and efficiently collect and utilize free solar energy, which is then conducted to the inside of the reactor through a light guide element, reducing the energy consumption of artificial light sources.

[0025] It should be noted that in this utility model, the solar tracker has a built-in drive motor and a photosensitive sensor, and is powered by an external power source. It can achieve automatic tracking. The device includes a central controller, which is electrically connected to the drive mechanism, the light collection device 4, the light sensor, and the temperature sensor. It is used to coordinate the parameters of light, flow, and temperature. The solar tracker with a focusing lens is a mature existing technology, and its specific structure and working principle will not be described in detail.

[0026] In this embodiment, as Figure 1 As shown, the light-emitting unit is a light guide strip or an LED light strip; and / or, the light guiding element is an optical fiber.

[0027] Through the above structure, the light guide element adopts optical fiber, which has low light transmission loss and flexible layout. The light-emitting unit adopts light guide strip, which can achieve uniform linear or surface light output and avoid the problem of uneven light spot of point light source. The use of LED light strip has the advantages of high luminous efficiency, long life, adjustable spectrum (such as red and blue light preferred), and easy control, which provides flexibility for optimizing the photosynthesis of different algal species. When the LED light strip is used as the bottom light-emitting unit, it can be powered by an external power source and serve as a supplementary or alternative light source when natural light is insufficient.

[0028] In this embodiment, as Figure 1 As shown, it also includes a drive mechanism and a stirring mechanism. The stirring mechanism includes a rotating shaft 5 rotatably assembled inside the expansion tank body 1, and multiple push plates 6 installed on the outer peripheral wall of the rotating shaft 5 through multiple connecting rods. The multiple push plates 6 are evenly distributed in a ring around the axis of the rotating shaft 5, and the surface of the push plate 6 forms an angle of 30-60° with the axis of the rotating shaft 5. The edge of the push plate 6 is reserved with a gap of 5-10mm between it and the inner wall of the expansion tank body 1 and the outer wall of the guide wall 101.

[0029] The drive mechanism is installed on the outer wall of the main body 1 of the expansion tank. The drive mechanism is a stepper motor or a servo motor. Its output shaft is connected to the rotating shaft 5 through a coupling. A seal is provided at the connection between the output shaft and the main body 1 of the expansion tank. The drive mechanism is used to drive the rotating shaft 5 to rotate at a speed of 5-20 r / min, thereby driving the push plate 6 to rotate synchronously, so as to push the algae liquid to make closed circulation movement along the closed circulation channel.

[0030] With the above structure, the pusher plate 6 has an angle of 30-60° with the axis of rotation, which can convert the rotational motion into an axial driving force along the flow channel, ensuring that the algal liquid can generate a stable and continuous directional circulation flow. A gap of 5-10mm is reserved between the edge of the pusher plate 6 and the pool wall and the guide wall 101, which can scrape the fluid and eliminate dead angles to the greatest extent, while avoiding excessive mechanical shearing force that could damage the algal cells, and also preventing jamming or wear. The drive mechanism adopts a stepper or servo motor and is driven at a low speed of 5-20r / min, which realizes the adjustment and control of the push speed and can optimize the mixing intensity according to the characteristics of the algal liquid at different growth stages.

[0031] The specific operating procedure of this utility model is as follows: First, the light collection device 4, located outside the main body 1 of the expansion tank, efficiently collects sunlight. The solar tracker can automatically adjust its angle in both horizontal and vertical directions to track the sun's position, ensuring that the incident light is captured to the maximum extent. The collected high-intensity light is transmitted to the main body 1 of the expansion tank without damage through the optical fiber, which serves as a light guide element, and via the sealed structure of the connecting tube 3 and the connecting channel 103.

[0032] Light entering the main body 1 of the expansion tank is conducted to a light-transmitting cover 102 located at the bottom of the inner wall of the main body 1. The light excites the light-emitting unit light guide strips or LED light strips inside the light-transmitting cover 102 to emit uniform light. Multiple light-transmitting covers 102 are arranged strictly along the closed circulation channel formed by the guide wall 101, so that the light shines upward from the bottom of the culture medium. This overcomes the defect of insufficient deep light caused by the self-shading effect of algal liquid in traditional top lighting, ensuring that algal cells can receive uniform and sufficient light as they flow through the bottom of the tank, thus improving the light energy utilization rate.

[0033] Simultaneously, the drive mechanism's stepper motor or servo motor starts, driving the rotating shaft 5 to rotate at a low speed of 5-20 r / min. The rotating shaft 5 drives multiple push plates 6, evenly distributed circumferentially, to rotate synchronously. The surface of the push plate 6 forms an optimal angle of 30-60° with the axis of the rotating shaft 5, efficiently converting the rotational motion into axial thrust along the flow channel. The precisely reserved 5-10 mm gap between the edge of the push plate 6 and the pool wall and guide wall 101 not only scrapes the fluid and eliminates dead zones to the greatest extent, but also avoids excessive shear damage to the algal cells caused by mechanical parts. Thus, the algal solution forms a stable, continuous, and gentle closed-loop flow within the main body 1 of the expansion tank.

[0034] As the algal cells flow, they periodically experience the light cycle above the light-transmitting cover 102 and the dark cycle in other areas of the flow channel, conforming to the light-dark cycle of their photosynthesis and promoting growth. Furthermore, the light-transmitting cover 102 itself is integrally molded from high-transmittance PC material, ensuring optical performance; its outer anti-fog coating prevents surface condensation, and its inner anti-algae adhesion coating inhibits algae from adhering to the surface. Combined with the continuous flushing action of the fluid, these factors ensure the long-term stable operation of the lighting system, maintaining high light transmittance and reducing maintenance requirements.

[0035] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A low-temperature diatom propagation tank, comprising a main body (1) of the propagation tank, wherein a guide wall (101) is provided in the middle of the inner wall of the main body (1) to form a closed circulation channel, characterized in that: At least one light-transmitting cover (102) is provided at the bottom of the inner wall of the expansion tank body (1), and a light-emitting unit is provided inside the light-transmitting cover (102); a light-collecting device (4) is installed on the expansion tank body (1) through a mounting bracket (2), and the light-collecting device (4) is connected to the light-emitting unit through a light guide element, which is used to transmit the collected external light to the light-emitting unit to provide illumination for the interior of the expansion tank body (1), thereby forming an internal lighting system from the bottom of the tank upward.

2. The diatom low-temperature expansion culture tank according to claim 1, characterized in that: There are multiple light-transmitting covers (102), which are arranged along the trajectory of the closed circulation channel at the bottom of the inner wall of the expansion tank body (1); a flow channel for fluid to pass through is formed between the multiple light-transmitting covers (102).

3. The diatom low-temperature expansion culture tank according to claim 2, characterized in that: The light-transmitting cover (102) is integrally formed from high-transmittance PC material, and the outer wall of the light-transmitting cover (102) is provided with an anti-fog coating, and the inner wall is provided with an anti-algae adhesion coating.

4. The diatom low-temperature expansion culture tank according to claim 1, characterized in that: The main body (1) of the expansion tank is provided with a connecting channel (103), and a connecting pipe (3) is sealed and installed at the connecting channel (103). The light guide element is sealed and installed inside the connecting channel (103) and the connecting pipe (3) to realize the light transmission connection between the light collection device (4) and the light-emitting unit in the light-transmitting cover (102). The light collection device (4) is a condensing lens or a solar tracker with a condensing lens. The solar tracker can adjust the angle in the horizontal and vertical directions to track the incident direction of the light source.

5. A diatom low-temperature expansion culture tank according to claim 1, characterized in that: The light-emitting unit is a light guide strip or an LED light strip; and / or, the light guide element is an optical fiber.

6. The diatom low-temperature expansion culture tank according to claim 1, characterized in that: It also includes a drive mechanism and a stirring mechanism. The stirring mechanism includes a rotating shaft (5) rotatably mounted inside the main body (1) of the expansion tank, and multiple push plates (6) installed on the outer peripheral wall of the rotating shaft (5) via multiple connecting rods. The multiple push plates (6) are evenly distributed in a ring around the axis of the rotating shaft (5). The drive mechanism is installed on the outer side wall of the main body (1) of the expansion tank. The drive mechanism is a stepper motor or a servo motor. Its output shaft is connected to the rotating shaft (5) via a coupling. A seal is provided at the connection between the output shaft and the main body (1) of the expansion tank. The drive mechanism is used to drive the push plates (6) to rotate, so as to push the algal liquid to make a closed-loop movement along the closed circulation channel.

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