Device for improving mixing efficiency of phototrophic microbial cultivation liquid in raceway pond

Abstract

The application provides a device for improving the mixing efficiency of a phototrophic microbial cultivation liquid in a raceway pond, and relates to the field of phototrophic microbial cultivation equipment. The device comprises a raceway pond, wherein a plurality of turbulence components for destroying the laminar flow state of the cultivation liquid and enabling the laminar flow to form a turbulent flow state are arranged in the raceway pond. The turbulence components comprise a fixing frame, the fixing frame is detachably connected to the raceway pond, and the fixing frame is provided with a flow guide. The device can destroy the laminar flow of the phototrophic microbial cultivation liquid in the raceway pond, realize the mixing of different laminar flows, and strengthen the mixing of the cultivation liquid in the light direction, thereby improving the conversion frequency of the phototrophic microbial cells in the light and dark areas, enabling the phototrophic microbial cells in different depths to realize light and dark cycles, improving the utilization efficiency of natural light by the phototrophic microorganisms, and increasing the yield of the large-scale production of the phototrophic microorganisms.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photoautotrophic microorganism culture equipment, in particular to a device for improving the mixing efficiency of photoautotrophic microorganism culture liquid in a raceway pond. BACKGROUND

[0002] Microalgae is a kind of photoautotrophic microorganism, which realizes growth and reproduction through photosynthesis. Photosynthesis includes two stages of light reaction and dark reaction. In the light reaction stage, photoautotrophic microorganisms convert light energy into chemical energy for storage, and in the dark reaction stage, chemical energy is used to provide energy for the biosynthesis process of cell components. In the process of microalgae cultivation, due to the mutual shading between cells and the fact that microalgae cells are at different depths of the culture liquid, there is a problem of lack or deficiency of light, which affects the growth and reproduction of microalgae. In actual production process, in order to avoid the problem of lack or deficiency of light, the photoautotrophic microorganisms are switched between light and dark areas at high frequency through mixing methods such as aeration and stirring, so as to maximize the utilization efficiency of light energy by microalgae and achieve the purpose of increasing production.

[0003] The raceway pond is the most commonly used cultivation method in large-scale production of microalgae. The microalgae culture liquid is continuously circulated in one direction along the raceway by the stirring paddle installed at one end of the raceway, so as to realize the mixing effect. In the traditional raceway pond, near the stirring paddle, the algae liquid is stirred by the stirring paddle, the laminar flow is destroyed, the turbulent flow is formed, and the different laminar algae liquids are well mixed. However, at a distance far away from the stirring paddle, the flowing microalgae culture liquid forms laminar flow, and the mixing effect in the direction of light is poor. The microalgae cells located in the laminar flow of the surface layer of the culture liquid continuously receive natural strong light, which causes photoinhibition. The microalgae cells located in the laminar flow of the lower layer of the culture liquid continuously stay in the dark environment and cannot receive external natural light, which causes light deficiency. Both photoinhibition and light deficiency will reduce the photosynthetic efficiency of microalgae, and ultimately affect the yield of microalgae.

[0004] The existing raceway pond generally only installs stirring paddles at one end or both ends of the raceway pond to push the microalgae culture liquid in the raceway pond to continuously circulate in one direction. This causes that the farther away from the stirring paddle, the more stable the laminar flow, and the poorer the mixing of the microalgae culture liquid in the direction of light. Especially for the raceway pond used for large-scale cultivation, the raceway is very long, and the laminar flow phenomenon is more obvious, so the mixing effect between different laminar flows of the microalgae culture liquid is poorer, which seriously affects the light energy utilization efficiency of microalgae.

[0005] In view of this problem, some people add an aeration device at the bottom of the raceway pond. Through aeration, the fluid above the aeration device is disturbed by the bubbles to realize the mixing of the microalgae culture liquid in the direction of light. However, there is uneven disturbance above the aeration device, and there is almost no disturbance below the aeration device, and the microalgae cells appear to be sinking and gathering.

[0006] Some people set a baffle in the direction of the algae liquid flow in the raceway pond to form a turbulent flow, promote the formation of convection between different layers of microalgae cultivation liquid, but there is a low mixing efficiency between different layers in the direction of light. SUMMARY

[0007] The purpose of the present application is to provide a device for improving the mixing efficiency of phototrophic microorganism cultivation liquid in a raceway pond. The device can destroy the laminar flow state of the phototrophic microorganism cultivation liquid in the raceway pond, generate turbulent flow, achieve the mixing effect between different layers, thereby strengthening the mixing of the cultivation liquid in the direction of light, increasing the conversion frequency of phototrophic microorganism cells in light and dark areas, and making the phototrophic microorganism cells in different depths achieve light and dark cycles, thereby improving the utilization efficiency of natural light by phototrophic microorganisms and increasing the yield of large-scale production of phototrophic microorganisms.

[0008] Embodiments of the present application are implemented as follows:

[0009] The device for improving the mixing efficiency of phototrophic microorganism cultivation liquid in a raceway pond provided by the embodiments of the present application comprises a raceway pond, and a plurality of turbulence components for destroying the laminar flow state of the cultivation liquid and generating turbulent flow are arranged in the raceway pond.

[0010] In some embodiments of the present application, the flow guide piece comprises a plurality of flow guide blades, both ends of the flow guide blades are rotatably arranged on both side walls of the fixed frame, and the plurality of flow guide blades are uniformly arranged on the fixed frame, and the upper and lower surfaces of the flow guide blades are inclined surfaces relative to the laminar flow surface.

[0011] In some embodiments of the present application, both ends of the flow guide blades are provided with mounting shafts, the fixed frame is provided with mounting holes corresponding to the mounting shafts, the mounting shafts are rotatably connected with the mounting holes, and the distal end of the mounting shaft is sleeved with a fastening knob abutting against the side wall of the fixed frame.

[0012] In some embodiments of the present application, the inclination angle of the flow guide blades is 30°-60°.

[0013] In some embodiments of the present application, both sides of the fixed frame are provided with sliding blocks, and both sides of the raceway pond are provided with sliding grooves corresponding to the sliding blocks, and the sliding blocks are slidably connected with the sliding grooves.

[0014] In some embodiments of the present application, the flow guide piece comprises a connecting column arranged on the fixed frame, and a plurality of flow guide ribbons are arranged on the connecting column.

[0015] In some embodiments of the present application, the above-mentioned drainage ribbon is transparent and has a width less than the width of the runway pool, and the plurality of connecting columns are staggered along the flow direction of the culture solution in the runway pool.

[0016] In some embodiments of the present application, the lower end of the fixed frame is provided with a connecting block, the lower wall of the runway pool is provided with a connecting groove corresponding to the connecting block, and the connecting block and the connecting groove are movably matched.

[0017] In some embodiments of the present application, one end of the drainage ribbon connected to the connecting column is provided with a fastening bolt, a connecting groove is formed in the vertical direction of the connecting column, the fastening bolt is located in the connecting groove, one end of the fastening bolt away from the connecting column is sleeved with a fastening nut, the fastening nut abuts against the connecting column, and a plurality of drainage ribbons are arranged on the connecting column in the vertical direction.

[0018] In some embodiments of the present application, the drainage member comprises a support rod, the lower end of the support rod is connected to the fixed frame, and the upper end of the support rod is connected with a drainage cylinder.

[0019] Compared with the prior art, the embodiments of the present application have at least the following advantages or beneficial effects:

[0020] When the culture solution in the laminar flow state passes through the turbulence assembly, the laminar flow state is destroyed, and turbulence is generated, so that the culture solutions in different laminar flows are fully mixed, and then the cells of the microalgae and other photoautotrophic microorganisms in the culture solution circulate in the light-dark area in the vertical light direction, the light illumination frequency is improved, and then the light energy utilization efficiency of the photoautotrophic microorganisms is improved, and the growth rate of the photoautotrophic microorganisms is improved. The fixed frame connected with the drainage member can be detachably fixed in the runway pool, which facilitates the disassembly, cleaning and maintenance of the device. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 It is a structural schematic view of embodiment 1 of the present application.

[0023] Figure 2 It is a structural schematic view of embodiment 2 of the present application.

[0024] Figure 3 It is a side view of embodiment 1 of the present application.

[0025] Figure 4 is a top view structural diagram of embodiment 2 of the present application.

[0026] Figure 5 is a side view structural diagram of embodiment 2 of the present application.

[0027] Figure 6 is another embodiment of embodiment 2 of the present application Figure 4 is a detail enlargement of A in the above figure.

[0028] Figure 7 is a structural diagram of another embodiment of embodiment 2 of the present application.

[0029] Figure 8 is a back view of another embodiment of embodiment 2 of the present application.

[0030] Figure 9 is a structural diagram of embodiment 3 of the present application.

[0031] Figure: 1 - runway pool, 2 - turbulence component, 3 - fixed frame, 4 - flow guide, 5 - flow guide blade, 6 - fastening knob, 7 - sliding block, 8 - sliding groove, 9 - connecting column, 10 - flow guide ribbon, 11 - connecting groove, 12 - fastening bolt, 13 - fastening nut, 14 - connecting block, 15 - mounting groove, 16 - connecting frame, 17 - sliding groove, 18 - fixed rod, 19 - support rod, 20 - flow guide cylinder. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0034] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0035] In the description of the embodiments of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product of the present application when it is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, if the terms "first", "second", "third" and the like appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] In addition, if the terms "horizontal", "vertical", "overhanging" and the like appear, they do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0037] In the description of the embodiments of the present application, "a plurality of" means at least two.

[0038] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection", "connection" appear, they should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected. It can be mechanically connected, or it can be electrically connected. It can be directly connected, or it can be indirectly connected through an intermediate medium. It can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] Embodiment 1

[0040] According to Figure 1 、 Figure 2 It is shown that the present application proposes a device for improving the light autotrophic microbial breeding liquid mixing efficiency of a runway pool 1, which comprises a runway pool 1, and a plurality of turbulence components 2 for destroying the laminar flow state of the breeding liquid in the runway pool 1 to form turbulent flow. The above-mentioned turbulence component 2 comprises a fixing frame 3, the fixing frame 3 is detachably connected with the above-mentioned runway pool 1, and the fixing frame 3 is provided with a flow guide piece 4.

[0041] The above runway pool 1 is a conventional photoautotrophic microorganism cultivation runway pool 1, mainly composed of a runway pool 1 connected at its head and tail, a speed reducer and a stirring paddle arranged in the runway pool 1. The speed reducer drives the stirring paddle to rotate, driving the photoautotrophic microorganism cultivation liquid to continuously flow in one direction along the runway pool 1. Due to the long length of the runway pool 1, the cultivation liquid at a position far from the stirring paddle forms a stable laminar flow, causing the photoautotrophic microorganisms in different laminar flows of the cultivation liquid to be unevenly irradiated, which in turn reduces the photosynthetic efficiency of the photoautotrophic microorganisms, and further affects the growth and reproduction of the photoautotrophic microorganisms.

[0042] The above turbulence assembly 2 is arranged in multiple numbers and can be uniformly arranged in the above runway pool 1. When the cultivation liquid passes through the turbulence assembly 2, the laminar flow state is destroyed, a turbulent flow is generated, and the cultivation liquid in different laminar flows is mixed with each other, so that the photoautotrophic microorganisms in the lower laminar flow of the cultivation liquid can move upward into the light zone to receive light and obtain the light energy required for growth and reproduction. The photoautotrophic microorganisms in the upper laminar flow can move downward into the dark zone to avoid photoinhibition caused by continuous light irradiation.

[0043] According to Figure 1 , Figure 3 and Figure 4 , in particular, the above flow guide 4 includes a plurality of flow guide vanes 5, both ends of the flow guide vane 5 are rotatably arranged on the two side walls of the fixed frame 3, and a plurality of the flow guide vanes 5 are uniformly arranged on the fixed frame 3, and the upper and lower surfaces of the flow guide vane 5 are inclined surfaces relative to the laminar flow surface

[0044] It is worth noting that a predetermined gap is arranged between the flow guide vanes 5. When the cultivation liquid passes through the gap, the cultivation liquid is guided by the inclined surface to destroy the laminar flow state, generate a turbulent flow, and realize the mixing between different laminar flows of the cultivation liquid.

[0045] In terms of the flow direction of the cultivation liquid in the above runway pool 1, the direction of the inclined surface of the flow guide vane 5 is low at the front end and high at the rear end. In this way, when the cultivation liquid passes through the gap, the lower laminar flow in the cultivation liquid changes its direction to flow upward and mixes with the upper laminar flow. The cultivation liquid continuously passes through a plurality of the above turbulence assemblies 2 to achieve the effect of continuously mixing the cultivation liquid in the vertical light irradiation direction.

[0046] In some actual use process, there may be a situation that the liquid level of the cultivation liquid in the runway pool 1 changes. When the liquid level changes, the inclination angle of the fixed flow guide vane 5 will affect the mixing effect of the cultivation liquid. Therefore, in order to solve this situation, according to Figure 3As shown, the drainage vane 5 is provided with a mounting shaft at both ends, the fixed frame 3 is provided with a mounting hole corresponding to the mounting shaft, the mounting shaft is rotationally connected with the mounting hole, and the mounting shaft is sleeved with a fastening knob 6 at the end, and the fastening knob 6 abuts against the side wall of the fixed frame 3. By loosening and fastening the fastening knob 6, the inclination angle of the drainage vane 5 can be adjusted.

[0047] It is worth noting that the inclination angle of the drainage vane 5 can be adjusted according to the depth of the cultivation liquid level. The deeper the cultivation liquid level, the larger the inclination angle of the drainage vane 5. In this way, the flow resistance of the drainage vane 5 to the cultivation liquid can be reduced to a certain extent, and the disturbance degree can be improved, so that the mixing efficiency of the cultivation liquid in the lower layer can be improved. At the same time, the inclination angle of the drainage vane 5 is optimally controlled within 30°-60°, and the inclination angle of the drainage vane 5 can be changed according to the flow rate of the cultivation liquid, so that the mixing characteristics of the turbulence assembly 2 can be better guaranteed.

[0048] In the long-term use of the device, the device itself may be dirty or damaged, so it may be necessary to frequently disassemble and install the device for maintenance and cleaning, so according to Figure 4 As shown, the fixed frame 3 is provided with a sliding block 7 at both sides, and the inner wall of the runway pool 1 is provided with a sliding groove 8 corresponding to the sliding block 7, and the sliding block 7 is slidably connected with the sliding groove 8. The installation and disassembly of the device are completed by the sliding cooperation of the sliding block 7 and the sliding groove 8, which reduces the labor intensity of maintenance and cleaning.

[0049] The working principle of the embodiment is: when the photoautotrophic microbial cultivation liquid passes through the gap between the drainage vanes 5, the drainage vanes 5 are inclined to guide the flow of the cultivation liquid, so that the photoautotrophic microbial cultivation liquid passes through the gap between the drainage vanes 5 from bottom to top under the driving of its own kinetic energy. The flow direction of the lower layer flow in the cultivation liquid is changed, and the upper layer flow is mixed, so that the photoautotrophic microorganisms also move in different layers of the cultivation liquid, avoiding the phenomenon of light deficiency or light shortage of the photoautotrophic microorganisms in the deeper cultivation liquid for a long time. The photoautotrophic microbial cells in different layers of the cultivation liquid can have equal probability of receiving light energy, so that the light energy utilization efficiency of the photoautotrophic microorganisms is improved, and the arrangement of multiple turbulence assemblies 2 can continuously mix the photoautotrophic microbial cultivation liquid. Due to the existence of the gap between the drainage vanes 5, the flow direction of the layer flow is better controlled, the directional mixing between different layers is realized, and the residence time of the photoautotrophic microorganisms in the light-dark area of the cultivation liquid is optimized.

[0050] Embodiment 2

[0051] Another embodiment of the present application adopts a different drainage member 4 structure from the above-mentioned embodiment 1.

[0052] It is worth noting that the above-mentioned fixing frame 3 can be plate-shaped or frame-shaped, or block-shaped, and the specific shape is adapted to the structure to be fixed by the fixing frame 3. In the present embodiment, the fixing frame 3 is a block-shaped structure.

[0053] Specifically, according to Figure 2 , Figure 5 , Figure 6 As shown in the figure, the above-mentioned drainage member 4 includes a connecting column 9, which is provided on the above-mentioned fixing frame 3, and a drainage ribbon 10 is provided on the above-mentioned connecting column 9. One end of the above-mentioned drainage ribbon 10 is directly fixed to the above-mentioned connecting column 9 and always maintains a vertical state with the connecting column 9, and the drainage ribbon 10 will not rotate relative to the connecting column 9. At the same time, the material of the above-mentioned drainage ribbon 10 is a high-molecular transparent thin strip, and it has a flexible characteristic, which can ensure that the drainage ribbon 10 can produce a wavy shaking track in the flowing liquid.

[0054] It is worth noting that the above-mentioned drainage ribbon 10 is a transparent strip, and the width of the above-mentioned drainage ribbon 10 is less than the width of the above-mentioned runway pool 1, and multiple above-mentioned connecting columns 9 are staggered distributed in the above-mentioned runway pool 1 along the direction of the cultivation liquid flow. In this way, to a certain extent, it can prevent the drainage ribbon 10 from blocking the light and hindering the photosynthesis of the phototrophic microorganism in the runway pool 1. And the width of the above-mentioned drainage ribbon 10 is set to be less than the width of the above-mentioned runway pool 1, which can ensure that the drainage ribbon 10 will not cause a large hindering effect on the cultivation liquid flow, and at the same time, the staggered distribution of the drainage ribbon 10 in the runway pool 1 can improve the mixing effect of the drainage ribbon 10 on the cultivation liquid.

[0055] In normal operation, when the phototrophic microorganism cultivation liquid passes through the above-mentioned drainage ribbon 10, the flowing cultivation liquid exerts a force on the drainage ribbon 10, causing the drainage ribbon 10 to locally produce a vertical deviation, and the deviations produced at different positions of the drainage ribbon 10 in the length direction are not the same, causing the drainage ribbon 10 to produce a wavy deviation track as a whole in the direction of the water flow. This makes the cultivation liquid produce mutual mixing between different layers under the continuous deviation of the drainage ribbon 10, promoting the mixing effect of the phototrophic microorganism.

[0056] It is worth noting that the effect of a single drainage ribbon 10 on the whole cultivation liquid is relatively small, and therefore, according to Figure 5 As shown in the figure, multiple drainage ribbons 10 are vertically arranged on the above-mentioned connecting column 9, which can ensure that multiple drainage ribbons 10 produce more effective mixing effect on different flow layers of the cultivation liquid in the same vertical direction, further improving the mixing degree of the phototrophic microorganism.

[0057] In actual use, the liquid level in the cultivation liquid can change, and thus the height of the drainage ribbon 10 needs to be adjusted sometimes, and thus one end of the drainage ribbon 10 connected to the connecting column 9 is provided with a fastening bolt 12, the connecting column 9 is provided with a connecting groove 11 in the vertical direction, the fastening bolt 12 is in the connecting groove 11, and one end of the fastening bolt 12 away from the connecting column 9 is sleeved with a fastening nut 13, and the fastening nut 13 abuts against the connecting column 9. The drainage ribbon 10 can be moved along the connecting groove 11 by fastening and loosening the fastening nut 13, and the effect of the drainage ribbon 10 can be ensured.

[0058] In order to facilitate the maintenance and replacement of the whole device, the lower end of the fixed frame 3 is provided with a connecting block 14, the lower wall of the runway pool 1 is provided with a mounting groove 15 corresponding to the connecting block 14, and the connecting block 14 is movably matched with the mounting groove 15. The device can be disassembled and assembled through the movable matching of the connecting block 14 and the mounting groove 15, and the convenience of using the device is improved.

[0059] The embodiment has another implementation, which is specifically as follows:

[0060] According to Figure 6 , Figure 7 and Figure 8 , the drainage member 4 comprises a connecting frame 16 and the drainage ribbon 10, and the bottom end of the connecting frame 16 is connected to the fixed frame 3.

[0061] Specifically, the connecting frame 16 is provided with a sliding groove 17 through which the cultivation liquid can pass, the drainage ribbon 10 is arranged in the sliding groove 17, and one end of the drainage ribbon 10 close to the connecting frame 16 is connected to a fixed rod 18 movably connected to the connecting frame 16.

[0062] It should be noted that the connecting part of the fixed rod 18 and the connecting frame 16 can be provided with a fixing device, which can be a bolt or a limiting pin matched with a pin hole arranged at a corresponding position on the connecting frame 16, so that the fixed rod 18 is relatively fixedly arranged on the connecting frame 16 and supports one end of the drainage ribbon 10 to be fixedly connected to the connecting frame 16, and the drainage ribbon 10 is at a reasonable height.

[0063] Embodiment 3

[0064] Another embodiment of the present application is different from the above-mentioned embodiments in that:

[0065] According to Figure 9 , the drainage member 4 comprises a supporting rod 19, the lower end of the supporting rod 19 is connected to the fixed frame 3, and the upper end of the supporting rod 19 is connected to a drainage cylinder 20.

[0066] Specifically, the diameter of the inlet and the outlet of the flow guide cylinder 20 is different, and the diameter of the inlet is larger than that of the outlet, and the height of the inlet is lower than that of the outlet. And the flow guide cylinder 20 can also be provided with multiple, multiple flow guide cylinders 20 staggered distribution in the runway pool 1, can better destroy the cultivation liquid laminar flow state and make the laminar flow form turbulent flow state.

[0067] It should be noted that the cylinder body of the flow guide cylinder 20 can be an arc-shaped cylinder extending upward, which can ensure that the cultivation liquid flows upward along the arc-shaped cylinder body through the inlet, thereby mixing the lower layer flow with the upper layer flow through the guidance of the flow guide cylinder 20, forming a turbulent flow, and promoting the light-dark cycle of the photoautotrophic microorganism.

[0068] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A device for improving the mixing efficiency of a phototrophic microbial cultivation liquid, characterized in that, The runway pool is provided with a plurality of turbulence components for destroying the laminar flow state of the aquaculture liquid and making the laminar flow form a turbulent state; the turbulence component comprises a fixing frame which is detachably connected to the runway pool, and the fixing frame is provided with a flow guide piece; the flow guide piece comprises a plurality of flow guide vanes which are rotatably arranged at both sides of the fixing frame, and the flow guide vanes are uniformly arranged on the fixing frame, and the upper and lower surfaces of the flow guide vanes are inclined surfaces relative to the laminar flow surface; or, the flow guide piece comprises a connecting column which is arranged on the fixing frame, and the connecting column is provided with a flow guide ribbon; or, the flow guide piece comprises a support rod which is connected to the fixing frame at the lower end, and the upper end of the support rod is connected with a flow guide cylinder; the flow guide cylinder is an upwardly extending arc-shaped cylinder, the diameters of the liquid inlet and the liquid outlet are different, the diameter of the liquid inlet is larger than that of the liquid outlet, and the height position of the liquid inlet is lower than that of the liquid outlet.

2. The device for improving the mixing efficiency of the raceway pond photoautotrophic microorganism cultivation liquid according to claim 1, characterized in that, Both ends of the flow guide vane are provided with mounting shafts, the fixing frame is provided with mounting holes corresponding to the mounting shafts, the mounting shafts are rotatably connected with the mounting holes, and the mounting shafts are sleeved with fastening knobs at the ends, and the fastening knobs abut against the side walls of the fixing frame.

3. The device for improving the mixing efficiency of the raceway pond photoautotrophic microorganism cultivation liquid according to claim 2, characterized in that, The inclination angle of the flow guide vane is 30°-60°.

4. The device for improving the mixing efficiency of the raceway pond photoautotrophic microorganism cultivation liquid according to claim 3, characterized in that, Both sides of the fixing frame are provided with sliding blocks, and both sides of the runway pool are provided with sliding grooves corresponding to the sliding blocks, and the sliding blocks are slidably connected with the sliding grooves.

5. The device for improving the mixing efficiency of the raceway pond photoautotrophic microorganism cultivation liquid according to claim 1, characterized in that, The flow guide ribbon is a transparent flexible ribbon, and the width of the flow guide ribbon is smaller than the width of the runway pool, and a plurality of connecting columns are staggered distributed in the runway pool along the flow direction of the aquaculture liquid.

6. The device for improving the mixing efficiency of the raceway pond photoautotrophic microorganism cultivation liquid according to claim 5, characterized in that, The lower end of the fixing frame is provided with a connecting block, and the lower wall of the runway pool is provided with a connecting groove corresponding to the connecting block, and the connecting block is movably connected with the connecting groove.

7. The device for improving the mixing efficiency of the raceway pond photoautotrophic microorganism cultivation liquid according to claim 6, characterized in that, One end of the flow guide ribbon connected with the connecting column is provided with a fastening bolt, the connecting column is provided with a connecting groove in the vertical direction, the fastening bolt is in the connecting groove, and the end of the fastening bolt away from the connecting column is sleeved with a fastening nut, the fastening nut abuts against the connecting column, and a plurality of flow guide ribbons are arranged on the connecting column in the vertical direction.

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