CN115232706A - Device for improving mixing efficiency of photoautotrophic microorganism culture solution in runway pool - Google Patents

Abstract

The invention provides a device for improving the mixing efficiency of photoautotrophic microorganism culture solution in a raceway pond, which relates to the field of photoautotrophic microorganism culture equipment and comprises the raceway pond, wherein a plurality of turbulence components for destroying the flow state of the culture solution and enabling the laminar flow to form a turbulent flow state are arranged in the raceway pond; the assembly capable of forming turbulent flow comprises a fixing frame, the fixing frame is detachably connected with the runway pool, and the fixing frame is provided with a drainage piece. The invention aims to provide a device for destroying the laminar flow of photoautotrophic microorganism culture solution in a raceway pond and realizing the mixing of different laminar flows.

Description

Device for improving mixing efficiency of photoautotrophic microorganism culture solution in runway pool

Technical Field

The invention relates to the field of photoautotrophic microorganism culture equipment, in particular to a device for improving the mixing efficiency of photoautotrophic microorganism culture solution in a raceway pond.

Background

Microalgae are photoautotrophic microorganisms that grow and reproduce through photosynthesis. Photosynthesis involves two phases, light and dark reactions. In the light reaction stage, photoautotrophic microorganisms convert light energy into chemical energy to be stored, and in the dark reaction stage, the chemical energy is used for providing energy for the biosynthesis process of cell components. In the process of microalgae culture, because the cells are mutually hidden and the microalgae cells are positioned at different depths of culture solution, the problem of lack or insufficient illumination exists, and the growth and the propagation of microalgae are influenced. In the actual production process, in order to avoid the problem of lack or insufficient illumination, photoautotrophic microorganisms are switched between light and dark areas at high frequency in a mixing mode of aeration, stirring and the like, so that the utilization efficiency of microalgae to light energy is maximized, and the purpose of increasing yield is achieved.

The runway pool is the most common culture mode in the large-scale production of microalgae, and the mixing effect is realized by pushing microalgae culture liquid to continuously flow in a unidirectional circulation manner along a runway through a stirring paddle arranged at one end of the runway pool. In a traditional runway pool, in the vicinity of a stirring paddle, laminar flow of algae liquid is destroyed by the stirring effect of the stirring paddle, turbulent flow is formed, and different laminar algae liquids are well mixed. However, in a place far away from the stirring paddle, the flowing microalgae culture solution forms a laminar flow, the mixing effect in the illumination direction is poor, the microalgae cells in the laminar flow of the culture solution surface layer continuously receive natural strong light to generate light inhibition, and the microalgae cells in the laminar flow of the culture solution lower layer are continuously in a dark environment and cannot receive external natural illumination, so that insufficient light is caused. Both photoinhibition and insufficient light reduce the photosynthetic efficiency of microalgae, ultimately affecting the yield of microalgae.

The existing raceway pond is only provided with stirring paddles at one end or two ends of the raceway pond to push microalgae culture liquid in the raceway pond to continuously and circularly flow in a unidirectional way. This causes that the farther the distance from the stirring paddle, the more stable the laminar flow, the worse the mixing of the microalgae culture solution in the illumination direction, especially in a runway pool for large-scale culture, the longer the runway is, the more obvious the laminar flow phenomenon is, the worse the mixing effect between different laminar flows of the microalgae culture solution is, and the light energy utilization efficiency of the microalgae is seriously affected.

Aiming at the problem, an aeration device is additionally arranged at the bottom of the runway pool, and through aeration, the fluid is driven by bubbles in the area above the air holes to generate mutual disturbance, so that the microalgae culture liquid is mixed in the illumination direction. But the disturbance above the aeration device is not uniform, the disturbance below the aeration device is almost not generated, and the microalgae cells are settled and aggregated.

And a barrier plate is arranged in the flowing direction of the microalgae liquid in the runway pool to form turbulent flow, so that convection among different laminar flows of the microalgae culture liquid is promoted, but the disadvantage of low mixing efficiency among the different laminar flows in the illumination direction exists.

Disclosure of Invention

The invention aims to provide a device for improving the mixing efficiency of photoautotrophic microorganism culture solution in a raceway pond, which can destroy the laminar flow state of the photoautotrophic microorganism culture solution in the raceway pond, generate turbulent flow, and realize the effect of mixing different laminar flows, so that the mixture of the culture solution in the illumination direction can be enhanced, the conversion frequency of photoautotrophic microorganism cells in a light dark area can be improved, and the photoautotrophic microorganism cells in laminar flows of different depths can realize light dark circulation, thereby improving the utilization efficiency of the photoautotrophic microorganisms on natural light, and increasing the yield of scale production of the photoautotrophic microorganisms.

The embodiment of the invention is realized by the following steps:

the embodiment of the application provides a device for improving the mixing efficiency of photoautotrophic microorganism culture solution in a raceway pond, which comprises the raceway pond, wherein a plurality of turbulence components for destroying the flow state of the culture solution and generating turbulence are arranged in the raceway pond; the turbulence assembly comprises a fixing frame, the fixing frame is detachably connected with the runway pool, and the fixing frame is provided with a drainage piece.

In some embodiments of the present invention, the drainage member includes a plurality of drainage blades, two ends of the drainage blades are respectively rotatably disposed on two sidewalls of the fixing frame, and the plurality of drainage blades are uniformly disposed on the fixing frame and upper and lower surfaces of the drainage blades are inclined planes with respect to a laminar flow plane.

In some embodiments of the present invention, mounting shafts are disposed at two ends of the flow guiding vane, the fixing frame is provided with mounting holes corresponding to the mounting shafts, the mounting shafts are rotatably matched with the mounting holes, and a fastening knob is sleeved at the end of each mounting shaft and abuts against a side wall of the fixing frame.

In some embodiments of the invention, the angle of inclination of the guide vanes is 30 ° to 60 °.

In some embodiments of the present invention, the fixing frame is provided with sliding blocks at both side ends thereof, and sliding grooves corresponding to the sliding blocks are formed on the inner walls of both sides of the raceway pond, and the sliding blocks are in sliding fit with the sliding grooves.

In some embodiments of the present invention, the flow guiding member includes a connecting column, the connecting column is disposed on the fixing frame, and a plurality of flow guiding ribbons are disposed on the connecting column.

In some embodiments of the present invention, the drainage ribbons are transparent ribbons, the width of the drainage ribbons is smaller than the width of the raceway pond, and a plurality of the connecting columns are distributed in the raceway pond in a staggered manner along the flowing direction of the aquaculture liquid.

In some embodiments of the present invention, a connecting block is disposed at a lower end of the fixing frame, a connecting groove corresponding to the connecting block is disposed at a lower wall of the raceway pond, and the connecting block is movably engaged with the connecting groove.

In some embodiments of the present invention, a fastening bolt is disposed at an end of the connecting column, where the drainage ribbon is connected to the connecting column, a connecting groove is formed in the connecting column in a vertical direction, the fastening bolt is disposed in the connecting groove, a fastening nut is sleeved at an end of the fastening bolt, which is away from the connecting column, and the fastening nut abuts against the connecting column, and a plurality of drainage ribbons are disposed on the connecting column in the vertical direction.

In some embodiments of the present invention, the drainage member includes a support rod, a lower end of the support rod is connected to the fixing frame, and an upper end of the support rod is connected to the drainage tube.

Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:

when the culture solution in the laminar flow state passes through the turbulence component, the laminar flow state is destroyed to generate turbulence, so that the culture solution in different laminar flows is fully mixed, cells of photoautotrophic microorganisms such as microalgae and the like in the culture solution circularly move in a light dark area vertical to the illumination direction, the illumination receiving frequency is improved, the light energy utilization efficiency of the photoautotrophic microorganisms is improved, the growth rate of the photoautotrophic microorganisms is improved, and meanwhile, the fixing frame is connected with the drainage piece and is detachably fixed in the runway pool, so that the disassembly, assembly, cleaning and maintenance work of the device can be facilitated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

Fig. 3 is a side view structural diagram of embodiment 1 of the present invention.

Fig. 4 is a top view structural diagram of embodiment 2 of the present invention.

Fig. 5 is a side view structural diagram of embodiment 2 of the present invention.

FIG. 6 is an enlarged view of detail A in FIG. 4 according to embodiment 2 of the present invention.

Fig. 7 is a schematic structural diagram of another embodiment of example 2 of the present invention.

FIG. 8 is a rear view of another embodiment of example 2 of the present invention.

Fig. 9 is a schematic structural diagram of embodiment 3 of the present invention.

An icon: 1-a raceway pond, 2-a turbulence component, 3-a fixing frame, 4-a drainage component, 5-a drainage blade, 6-a fastening knob, 7-a sliding block, 8-a sliding groove, 9-a connecting column, 10-a drainage ribbon, 11-a connecting groove, 12-a fastening bolt, 13-a fastening nut, 14-a connecting block, 15-a mounting groove, 16-a connecting frame, 17-a sliding groove, 18-a fixing rod, 19-a supporting rod and 20-a drainage cylinder.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and therefore, should not be construed as limiting the present invention. Furthermore, the appearances of the terms "first," "second," "third," and the like, if any, are only used to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, the presence of "a plurality" means at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. They may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Example 1

According to the drawings 1 and 2, the invention provides a device for improving the mixing efficiency of photoautotrophic microorganism culture solution in a raceway pond 1, which comprises the raceway pond 1, wherein a plurality of turbulence components 2 for destroying the flow state of the culture solution and forming turbulence are arranged in the raceway pond 1; above-mentioned vortex subassembly 2 includes mount 3, and above-mentioned runway pond 1 can be dismantled and connect to above-mentioned mount 3, and above-mentioned mount 3 is provided with drainage piece 4.

The runway pool 1 is an existing photoautotrophic microorganism culture runway pool 1, and mainly comprises an end-to-end runway pool 1 and a speed reducer and a stirring paddle arranged in the runway pool 1, wherein the speed reducer drives the stirring paddle to rotate to drive photoautotrophic microorganism culture liquid to continuously and unidirectionally circularly flow along the runway pool 1, and the runway pool 1 is longer, so that the culture liquid at a position far away from the stirring paddle forms a stable laminar flow, light receiving of photoautotrophic microorganisms in different laminar flows of the culture liquid is not uniform, photosynthetic efficiency of the photoautotrophic microorganisms is reduced, and growth and propagation of the photoautotrophic microorganisms are influenced.

Above-mentioned vortex subassembly 2 sets up to a plurality ofly, can evenly set up in above-mentioned runway pond 1, when breeding liquid and passing through above-mentioned vortex subassembly 2, can be so that the laminar flow state is destroyed, produces the turbulent flow, breeds the different laminar intercorrelations of liquid to the photoautotrophic microorganism that makes to be in the laminar flow of breed liquid lower floor can the upward movement, enters into the light zone, accepts illumination, obtains the light energy that the growth was bred and needs. And photoautotrophic microorganisms in the upper laminar flow can move downwards and enter the dark space, so that photoinhibition caused by continuous illumination is avoided.

As shown in fig. 1, 3 and 4, specifically, the drainage member 4 includes a plurality of drainage blades 5, two ends of the drainage blades 5 are respectively rotatably disposed on two side walls of the fixing frame 3, the plurality of drainage blades 5 are uniformly disposed on the fixing frame 3, and upper and lower surfaces of the drainage blades 5 are inclined planes with respect to a laminar flow plane

It is worth noting that the preset gaps are formed among the drainage blades 5, when the culture solution passes through the gaps, the laminar flow state of the culture solution is destroyed under the guiding effect of the inclined surface, turbulent flow is generated, and mixing of different laminar flows of the culture solution is achieved.

In the above-mentioned runway pond 1 in the flow direction of breeding the liquid stream, the direction of above-mentioned 5 inclined planes of guide vane is the front end low rear end height, can make when breeding the liquid through above-mentioned clearance like this, and the laminar flow direction of lower floor changes to the upper strata in breeding the liquid and flows, takes place to mix with upper strata laminar flow, and its breeding liquid is constantly through a plurality of above-mentioned vortex subassemblies 2, reaches the effect that breeding liquid lasts to mix in vertical light direction.

In the use of some reality, probably there is the situation of breeding the liquid level change in runway pond 1, when the liquid level changes, fixed drainage blade 5's inclination can influence the mixed effect of breed liquid, therefore, in order to solve this situation, as shown in fig. 3, above-mentioned drainage blade 5 both ends all are provided with the installation axle, above-mentioned mount 3 has seted up the mounting hole corresponding with above-mentioned installation axle, above-mentioned installation axle and above-mentioned mounting hole normal running fit, and above-mentioned installation axle end has cup jointed fastening knob 6, the 3 lateral walls of above-mentioned mount of 6 butt of above-mentioned fastening knob. By loosening and tightening the tightening knob 6, the inclination angle of the guide vane 5 can be adjusted.

It is worth noting that the inclination angle of the above-mentioned drainage blade 5 can be adjusted correspondingly according to the depth of the cultivation liquid level, and the deeper the cultivation liquid level is, the larger the inclination angle of the drainage blade 5 is. Can reduce drainage blade 5 to a certain extent and flow retardation to the culture solution like this, promote the disturbance degree, can promote the mixing efficiency to the lower laminar flow of culture solution. Meanwhile, the inclination angle of the guide vanes 5 is optimally controlled to be 30-60 degrees, and the inclination angle of the guide vanes 5 can be changed according to the flow velocity of the culture solution, so that the mixing characteristic of the turbulence component 2 can be better ensured.

When the device is used for a long time, dirt can be accumulated or damaged, so that the device can be required to be frequently disassembled and assembled for maintenance and cleaning, and therefore, as shown in fig. 4, the two side ends of the fixed frame 3 are both provided with the sliding blocks 7, the inner walls of the two sides of the runway pool 1 are provided with the sliding grooves 8 corresponding to the sliding blocks 7, and the sliding blocks 7 are in sliding fit with the sliding grooves 8. The installation and the disassembly of the device are completed through the movable matching of the sliding block 7 and the sliding groove 8, and the corresponding labor intensity of maintenance and cleaning is reduced.

The working principle of the embodiment is as follows: when photoautotrophic microorganism culture solution passes through the gaps of the drainage blades 5, the drainage blades 5 are obliquely arranged to guide the flow of the culture solution, so that the photoautotrophic microorganism culture solution passes through the gaps of the drainage blades 5 from bottom to top under the pushing of self kinetic energy, the flow direction of lower laminar flow in the culture solution is changed and is mixed with upper laminar flow, photoautotrophic microorganisms also move mutually among different laminar flows along with the culture solution, the phenomenon of light deficiency or light deficiency caused by that the photoautotrophic microorganisms in deeper culture solution receive no light for a long time is avoided, photoautotrophic microorganism cells in different laminar flows of the culture solution can receive light energy at the same probability, the light energy utilization efficiency of the photoautotrophic microorganisms is improved, the photoautotrophic microorganism culture solution can be continuously mixed due to the arrangement of the plurality of turbulence components 2, and the flow guide effect is achieved due to the existence of the gaps of the drainage blades 5, the flow direction of the laminar flow is better controlled, the directional mixing among different laminar flows is achieved, and the residence time of the photoautotrophic microorganisms in a dark area of the culture solution is optimized.

Example 2

Another embodiment of the present invention adopts a structure of the flow guide 4 different from that of the above embodiment 1.

It should be noted that the fixing frame 3 may be a plate, a frame, or a block, and the specific shape is adapted to the structure to be fixed by the fixing frame 3, in this case, the fixing frame 3 is a mounting block structure.

Specifically, as shown in fig. 2, 5 and 6, the drainage member 4 includes a connection post 9, the connection post 9 is disposed on the fixing frame 3, and the drainage ribbon 10 is disposed on the connection post 9. One end of the flow guiding ribbons 10 is directly fixed to the connecting column 9 and is always perpendicular to the connecting column 9, and the flow guiding ribbons 10 do not rotate relative to the connecting column 9. Meanwhile, the drainage ribbon 10 is made of a polymer transparent thin belt and has the flexible characteristic, so that the drainage ribbon 10 can generate wavy shaking tracks in flowing liquid.

It should be noted that the drainage ribbons 10 are transparent ribbons, the width of the drainage ribbons 10 is smaller than the width of the raceway pond 1, and the connecting columns 9 are distributed in the raceway pond 1 in a staggered manner along the flowing direction of the culture liquid. This prevents, to some extent, the drainage streamers 10 from blocking light from interfering with the photosynthesis of photoautotrophic microorganisms in the raceway pond 1. And above-mentioned drainage ribbon 10 width sets up the width that is less than above-mentioned runway pond 1, can guarantee that drainage ribbon 10 can not lead to the fact great hindrance effect to breeding liquid flow, and drainage ribbon 10 staggered arrangement simultaneously can promote the mixed effect of drainage ribbon 10 to breeding liquid in runway pond 1.

At normal during operation, when photoautotrophic microorganism culture solution passes through above-mentioned drainage banderol 10, mobile culture solution exerts effort to drainage banderol 10 and makes the local skew that produces vertical direction of drainage banderol 10, and the skew that drainage banderol 10 produced in different positions on length direction is inequality, make drainage banderol 10 produce wavy skew orbit along the whole skew track that produces of rivers direction, this makes culture solution produce the intermixing between the different laminar flows under the continuous skew effect of drainage banderol 10, photoautotrophic microorganism's mixed effect has been promoted.

It is worth noting that the effect of a single drainage ribbon 10 is less on the whole culture solution, so that according to fig. 5, a plurality of drainage ribbons 10 are arranged on the connecting column 9 in the vertical direction, so that the drainage ribbons 10 can be ensured to produce more effective mixing effect on different flow layers of the culture solution in the same vertical direction, and the mixing degree of photoautotrophic microorganisms is further improved.

In practical use, the level of the culture fluid may change, and therefore it is sometimes necessary to adjust the height position of the drainage ribbons 10, so that the end of the drainage ribbons 10 connected to the connecting column 9 is provided with a fastening bolt 12, the connecting column 9 is vertically provided with a connecting groove 11, the fastening bolt 12 is located in the connecting groove 11, and the 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 effect of the leading ribbons 10 is ensured by tightening and loosening the fastening nuts 13 to move the leading ribbons 10 in the direction of the connecting grooves 11.

In order to facilitate the maintenance and replacement of the whole device, the lower end of the fixing frame 3 is provided with a connecting block 14, the lower wall of the raceway pond 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. Can come dismouting device through above-mentioned connecting block 14 and above-mentioned mounting groove 15 clearance fit, promote the convenience that this device used.

The embodiment has another implementation manner, which is as follows:

as shown in fig. 6, 7 and 8, the flow guiding member 4 includes a connecting frame 16 and the flow guiding ribbons 10, and the bottom end of the connecting frame 16 is connected to the fixing frame 3.

Specifically, the connecting frame 16 is provided with a sliding groove 17 through which the culture solution can pass, the drainage ribbon 10 is disposed in the sliding groove 17, and one end of the drainage ribbon 10 close to the connecting frame 16 is connected with a fixing rod 18, and the fixing rod 18 is movably connected to the connecting frame 16.

It should be noted that, a fixing device may be disposed at a connection portion of the fixing rod 18 and the connection frame 16, and the fixing device may be a bolt, or may be a limiting pin cooperating with a corresponding position on the connection frame 16 to form a pin hole, so that the fixing rod 18 is relatively fixedly disposed on the connection frame 16, and supports one end of the drainage ribbon 10 to be fixedly connected to the connection frame 16, and the drainage ribbon 10 is at a reasonable height.

Example 3

Another embodiment of the present invention takes on the difference from the above embodiment in that:

as shown in fig. 9, the drainage member 4 includes a support rod 19, the lower end of the support rod 19 is connected to the fixing frame 3, and the upper end of the support rod 19 is connected to a drainage tube 20.

Specifically, the diameters of the liquid inlet and the liquid outlet of the drainage tube 20 are different, and the diameter of the liquid inlet is larger than that of the liquid outlet, and the height of the liquid inlet is lower than that of the liquid outlet. And a plurality of drainage cylinders 20 also can be provided, and a plurality of drainage cylinders 20 crisscross distribution can destroy the breed liquid laminar flow state and make the laminar flow form turbulent flow state better in runway pond 1.

It should be noted that, the cylinder body of the drainage cylinder 20 can be an arc cylinder which gradually extends upwards, so that the culture solution can flow along with the upward arc cylinder body in the drainage cylinder 20 through the liquid inlet, and further, the lower laminar flow is mixed with the upper laminar flow through the guiding of the drainage cylinder 20 to form a turbulent flow, and the light-dark circulation of the photoautotrophic microorganisms is promoted.

The present invention has been described in terms of the preferred embodiment, and it is not intended to be limited to the embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A device for improving the mixing efficiency of photoautotrophic microorganism culture solution in a raceway pond is characterized by comprising the raceway pond, wherein a plurality of turbulence components for destroying the flow state of the culture solution and enabling the laminar flow to form a turbulent flow state are arranged in the raceway pond; the turbulent flow component comprises a fixing frame, the fixing frame is detachably connected with the runway pool, and the fixing frame is provided with a drainage piece.

2. The device for improving the mixing efficiency of the photoautotrophic microorganism culture solution in the raceway pond according to claim 1, wherein the drainage member comprises a plurality of drainage blades, two ends of each drainage blade are respectively and rotatably arranged on two side walls of the fixing frame, the plurality of drainage blades are uniformly arranged on the fixing frame, and the upper surface and the lower surface of each drainage blade are inclined planes relative to a laminar flow plane.

3. The device of claim 2, wherein mounting shafts are disposed at both ends of the flow-guiding blade, the fixing frame is provided with mounting holes corresponding to the mounting shafts, the mounting shafts are rotatably matched with the mounting holes, and a fastening knob is sleeved at the tail end of each mounting shaft and abuts against the side wall of the fixing frame.

4. The device for improving the mixing efficiency of photoautotrophic microorganism culture solution in runway pool according to claim 3, characterized in that the inclination angle of the drainage blade is 30-60 °.

5. The device for improving the mixing efficiency of photoautotrophic microorganism culture solution in the raceway pond according to claim 4, wherein sliding blocks are arranged at both side ends of the fixing frame, sliding grooves corresponding to the sliding blocks are arranged on the inner walls of both sides of the raceway pond, and the sliding blocks are in sliding fit with the sliding grooves.

6. The device for improving the mixing efficiency of photoautotrophic microorganism culture solution in runway pool according to claim 1, characterized in that the drainage member comprises a connecting column, the connecting column is arranged on the fixing frame, and a drainage ribbon is arranged on the connecting column.

7. The device for improving the mixing efficiency of photoautotrophic microorganism culture solutions in runway ponds according to claim 6, characterized in that the drainage ribbons are transparent flexible ribbons, the width of the drainage ribbons is smaller than the width of the runway pond, and the connecting columns are distributed in the runway pond in a staggered way along the culture solution flow direction.

8. The device for improving the mixing efficiency of photoautotrophic microorganism culture solution in the runway pool of claim 7, wherein a connecting block is arranged at the lower end of the fixing frame, a connecting groove corresponding to the connecting block is arranged on the lower wall of the runway pool, and the connecting block is movably matched with the connecting groove.

9. The device for improving the mixing efficiency of the photoautotrophic microorganism culture solution in the runway pool according to claim 8, characterized in that a fastening bolt is arranged at one end of the drainage streamer connected with the connecting column, a connecting groove is formed in the vertical direction of the connecting column, the fastening bolt is arranged in the connecting groove, a fastening nut is sleeved at one end of the fastening bolt far away from the connecting column, the fastening nut abuts against the connecting column, and a plurality of drainage streamers are arranged on the connecting column in the vertical direction.

10. The device for improving the mixing efficiency of photoautotrophic microorganism culture solution in runway pool according to claim 1, characterized in that the drainage piece comprises a support rod, the lower end of the support rod is connected with the fixing frame, and the upper end of the support rod is connected with a drainage tube.

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