Spirulina culture liquid carbon source supplementing device

Abstract

The utility model belongs to the technical field of spirulina cultivation equipment, and particularly discloses a spirulina cultivation liquid carbon source supplementing device which comprises a supplementing cover, a first ventilation pipe and a second ventilation pipe are connected to the lower portion in the supplementing cover, a plurality of air outlet holes are formed in the first ventilation pipe and the second ventilation pipe, and the first ventilation pipe is connected with an air supply pipe. The second breather pipe is connected with a circulating pipe, the other end of the circulating pipe is connected with a fan, the fan is connected with an exhaust pipe, the exhaust pipe is communicated with the top of the supplementing cover, a carbon dioxide sensor is installed on the exhaust pipe, an electromagnetic gas valve is installed on the gas supply pipe, the carbon dioxide sensor is in communication connection with the controller, and the electromagnetic gas valve is controlled by the controller. The first ventilation pipe and the second ventilation pipe are arranged below the liquid level of the breeding liquid and provided with the air outlet holes, carbon dioxide is introduced into the breeding liquid, the contact time and the contact area of carbon dioxide gas and the breeding liquid can be increased in the floating process of the carbon dioxide, and the carbon dioxide absorption efficiency of the breeding liquid is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of spirulina cultivation equipment, specifically a carbon source replenishment device for spirulina cultivation liquid. Background Technology

[0002] Spirulina is a type of lower organism, a prokaryote, and a strictly photoautotrophic algae. It relies on sunlight and the absorption of CO2 from the water for photosynthesis. Its filamentous structure, composed of multiple cells, is loosely or tightly coiled in a regular spiral shape, resembling a clockwork spring, hence its name. Spirulina has been shown to reduce the toxic side effects of cancer radiotherapy and chemotherapy, improve immune function, and lower blood lipids. During large-scale spirulina cultivation, ensuring the optimal parameters for spirulina growth (temperature, light, carbon source, pH, etc.) is crucial for stable and high yields.

[0003] Spirulina cultivation in large ponds requires regular carbon source replenishment of the culture medium. Conventional methods use sodium bicarbonate, but this causes a rapid increase in pH, necessitating frequent medium changes and generating significant amounts of wastewater. A newer method uses carbon dioxide instead of sodium bicarbonate, introducing a high concentration of carbon dioxide into the culture medium, allowing it to dissolve and replenish the carbon source. However, current methods using high-concentration carbon dioxide in large-scale spirulina cultivation suffer from slow carbon dioxide absorption, resulting in low carbon source replenishment efficiency. Therefore, a carbon source replenishment device for spirulina culture medium needs to be designed to improve carbon dioxide absorption efficiency and increase carbon source replenishment efficiency. Utility Model Content

[0004] To address the above technical problems, this utility model provides a spirulina culture medium carbon source replenishment device that can improve the carbon dioxide absorption efficiency of the culture medium and increase the carbon source replenishment efficiency of carbon dioxide, so as to solve the problem that the low absorption efficiency of carbon dioxide when using carbon dioxide as a carbon source replenishment leads to the overall low efficiency of carbon source replenishment.

[0005] To solve the above technical problems, the technical solution of this utility model is as follows: a carbon source replenishment device for spirulina culture liquid, including a replenishment cover, which is a bottomless cylindrical structure. A mounting bracket is fixedly connected to the side of the replenishment cover. A first vent pipe and a second vent pipe are fixedly connected to the lower part of the replenishment cover. Both the first vent pipe and the second vent pipe have several air outlets. An air supply pipe is fixedly connected to the input end of the first vent pipe, and the other end of the air supply pipe is connected to a carbon dioxide storage cylinder. A circulation pipe is fixedly connected to the input end of the second vent pipe, and a fan is fixedly connected to the other end of the circulation pipe. An exhaust pipe is fixedly connected to the input end of the fan, and the other end of the exhaust pipe is connected to the top of the replenishment cover. A carbon dioxide sensor is installed on the exhaust pipe, and an electromagnetic valve is installed on the air supply pipe. The carbon dioxide sensor is communicatively connected to a controller, and the electromagnetic valve is controlled by the controller.

[0006] Furthermore, one-way valves are installed on both the gas supply pipe and the circulation pipe.

[0007] Furthermore, a water level indicator line is provided on the outside of the supplementary cover, and the first vent pipe and the second vent pipe are located below the water level indicator line.

[0008] Furthermore, the side wall of the replenishment cover is provided with several through holes below the water level indicator line. A stirring motor is fixedly connected to the top of the replenishment cover. A vertically arranged stirring shaft is fixedly connected to the output end of the stirring motor. Several stirring paddles are fixedly connected to the stirring shaft. The lower end of the stirring shaft is located above the first vent pipe and the second vent pipe. The stirring paddles are all installed below the water level indicator line.

[0009] This utility model has the following advantages compared with the prior art:

[0010] 1. This utility model, by setting up an air supply pipe, a fan, and a circulation pipe, places the first and second air pipes below the level of the aquaculture liquid and opens air outlets to introduce carbon dioxide into the aquaculture liquid. The process of carbon dioxide rising increases the contact time and contact area between the carbon dioxide gas and the aquaculture liquid, improving the efficiency of carbon dioxide absorption in the aquaculture liquid. The fan continuously draws the rising carbon dioxide into the circulation pipe, and then into the second air pipe to introduce carbon dioxide back into the aquaculture liquid for absorption, further improving the absorption efficiency of carbon dioxide, thereby improving the overall efficiency of carbon source replenishment.

[0011] 2. This utility model, by installing one-way valves on the air supply pipe and circulation pipe, can prevent the aquaculture liquid from flowing back into the air supply pipe and circulation pipe and damaging the device, thus avoiding affecting the normal use of the device; by installing a stirring motor, stirring shaft, and stirring paddle inside the replenishment hood, and opening a through hole on the side wall of the replenishment hood for water to flow through, the flow and exchange of aquaculture liquid inside and outside the replenishment hood can be accelerated by stirring. This allows the aquaculture liquid that has absorbed carbon dioxide to flow out of the replenishment hood, while the aquaculture liquid outside the replenishment hood that has not yet absorbed carbon dioxide can flow into the replenishment hood to absorb carbon dioxide. Since the concentration of dissolved carbon dioxide in the aquaculture liquid flowing in from outside the replenishment hood is relatively lower, the continuous exchange of aquaculture liquid inside and outside can also improve the efficiency of carbon dioxide dissolving into the aquaculture liquid, further improving the carbon dioxide absorption efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the external structure of this utility model.

[0014] In the diagram: 1. Supplement cover, 2. Mounting bracket, 3. First vent pipe, 4. Second vent pipe, 5. Vent hole, 6. Air supply pipe, 7. Circulation pipe, 8. Fan, 9. Extraction pipe, 10. Carbon dioxide sensor, 11. Solenoid valve, 12. Water level indicator line, 13. Through hole, 14. Stirring motor, 15. Stirring shaft, 16. Stirring paddle, 17. Check valve. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] like Figures 1 to 2The device shown is a carbon source replenishment device for spirulina culture liquid, including a replenishment cover 1, which is a bottomless cylindrical structure. A mounting bracket 2 is fixedly connected to the side of the replenishment cover 1, used to fix the replenishment cover 1 to the edge of the culture pond. A breathing valve is installed on the top of the replenishment cover 1 to prevent the upper gas space inside the replenishment cover 1 from being under negative or high pressure. A first vent pipe 3 and a second vent pipe 4 are fixedly connected to the lower part of the replenishment cover 1. Both the first vent pipe 3 and the second vent pipe 4 are fixedly connected to the inner wall of the replenishment cover 1 by clamps. Both the first vent pipe 3 and the second vent pipe 4 are planar spirals. Each part is provided with several air outlets 5. The first air pipe 3 is fixedly connected to the air supply pipe 6 at its input end. The other end of the air supply pipe 6 is fixedly connected to the air valve of the carbon dioxide storage cylinder. The second air pipe 4 is fixedly connected to the circulation pipe 7 at its input end. The other end of the circulation pipe 7 is fixedly connected to the fan 8. The input end of the fan 8 is fixedly connected to the suction pipe 9. The fan 8 sends the gas in the suction pipe 9 into the circulation pipe 7. The other end of the suction pipe 9 is connected to the top of the replenishment cover 1. A carbon dioxide sensor 10 is installed on the suction pipe 9. An electromagnetic valve 11 is installed on the air supply pipe 6. The carbon dioxide sensor 10 is connected to the controller. The electromagnetic valve 11 is controlled by the controller.

[0017] To prevent the aquaculture liquid in the pond from flowing back into the air supply pipe 6 and circulation pipe 7 through the first air pipe 3 and the second air pipe 4, one-way valves 17 are installed on both the air supply pipe 6 and the circulation pipe 7.

[0018] To facilitate determining the installation height of this device, a water level indicator line 12 is provided on the outside of the supplementary cover 1. When installing this device, the installation height can be determined by aligning the water level indicator line 12 with the liquid level in the pool. In order to introduce carbon dioxide gas into the water, the first vent pipe 3 and the second vent pipe 4 are located below the horizontal plane corresponding to the water level indicator line 12, that is, below the liquid level of the water surface in the pool.

[0019] To accelerate the flow between the culture medium inside and outside the supplementary cover 1 and increase the carbon dioxide dissolution rate of the culture medium inside the supplementary cover 1, several through holes 13 are provided on the side wall of the supplementary cover 1 below the water level indicator line 12. A stirring motor 14 is fixedly connected to the top inside the supplementary cover 1, and a vertically arranged stirring shaft 15 is fixedly connected to the output end of the stirring motor 14. Several stirring paddles 16 are fixedly connected to the stirring shaft 15. The lower end of the stirring shaft 15 is located above the first vent pipe 3 and the second vent pipe 4. The stirring paddles 16 are all installed below the horizontal plane corresponding to the water level indicator line 13. Under the stirring of the stirring paddles 16, a portion of the culture medium inside the supplementary cover 1 that has absorbed carbon dioxide flows out of the supplementary cover 1 through the through holes 13 on the side wall of the supplementary cover 1, while the culture medium outside the supplementary cover 1 enters the supplementary cover 1 from the bottom of the supplementary cover 1 to absorb carbon dioxide again, continuously circulating, thereby improving the carbon dioxide absorption efficiency and utilization efficiency.

[0020] The specific working process of this utility model is as follows:

[0021] Align the water level indicator line 12 on the replenishment cover 1 with the liquid level in the spirulina culture pond, and then fix the replenishment cover 1 to the edge of the culture pond using the mounting bracket 2. Whenever carbon source replenishment is needed, open the gas supply valve of the carbon dioxide storage cylinder to fill the gas supply pipe 6 with carbon dioxide gas, start the stirring motor 14 and the blower 8, and open the solenoid valve 11 through the controller to fill the carbon dioxide in the gas supply pipe 6 into the first vent pipe 3 through the one-way valve 17 on the gas supply pipe 6. The carbon dioxide enters the replenishment cover 1 through the vent hole 5 on the first vent pipe 3, and comes into contact with the culture liquid during its ascent, and is continuously absorbed and dissolved by the culture liquid. The stirring motor 14 rotates, driving the stirring shaft 15 and the stirring paddle 16 to rotate, thereby stirring the culture liquid in the replenishment cover 1 and accelerating the flow and exchange of the culture liquid inside and outside the replenishment cover 1. The blower 8 draws the carbon dioxide that floats out of the culture liquid back into the exhaust pipe 9 and sends it into the circulation pipe 7, and then into the second vent pipe 4 through the one-way valve 17 on the circulation pipe 7, and then through the vent hole again. 5. The carbon source in the spirulina culture tank is replenished after the blower 8 is turned off and the spirulina enters the replenishment hood 1 and is continuously absorbed by the aquaculture liquid during the floating process. During this process, the carbon dioxide sensor 10 located on the exhaust pipe 9 detects the carbon dioxide content in the gas flowing in the exhaust pipe 9 in real time and continuously transmits the monitoring result signal to the controller. The controller is set with an upper limit and a lower limit for the carbon dioxide content. When the signal received by the controller is greater than the upper limit, the controller controls the solenoid valve 11 to close and the carbon dioxide storage cylinder stops supplying carbon dioxide to the replenishment hood 1. When the signal received by the controller is less than the lower limit, the controller controls the solenoid valve 11 to reopen and the carbon dioxide storage cylinder supplies carbon dioxide to the replenishment hood 1 again. By dynamically adjusting the concentration of carbon dioxide in the gas in the replenishment hood 1 in this way, it is possible to avoid the formation of high pressure in the upper gas space of the replenishment hood 1 when carbon dioxide is continuously introduced, which would cause the breathing valve to open and discharge carbon dioxide, resulting in carbon dioxide waste.

Claims

1. A spirulina cultivation liquid carbon source supplementing device, comprising a supplementing cover (1), the supplementing cover (1) is a bottomless cylindrical structure, a mounting rack (2) is fixedly connected to the side of the supplementing cover (1), characterized in that: The first air pipe (3) and the second air pipe (4) are fixedly connected to the lower part of the supplement cover (1), a plurality of air outlets (5) are formed in the first air pipe (3) and the second air pipe (4), the input end of the first air pipe (3) is fixedly connected with a gas supply pipe (6), the other end of the gas supply pipe (6) is communicated with a carbon dioxide storage cylinder, the input end of the second air pipe (4) is fixedly connected with a circulation pipe (7), the other end of the circulation pipe (7) is fixedly connected with a fan (8), the input end of the fan (8) is fixedly connected with an air exhaust pipe (9), the other end of the air exhaust pipe (9) is communicated with the top of the supplement cover (1), a carbon dioxide sensor (10) is installed on the air exhaust pipe (9), an electromagnetic valve (11) is installed on the gas supply pipe (6), the carbon dioxide sensor (10) is in communication connection with a controller, and the electromagnetic valve (11) is controlled by the controller. A water level indicating line (12) is arranged outside the supplement cover (1), the first air pipe (3) and the second air pipe (4) are located below the water level indicating line (12), a plurality of through holes (13) are formed in the side wall of the supplement cover (1) below the water level indicating line (12), a stirring motor (14) is fixedly connected to the top of the supplement cover (1), a vertical stirring shaft (15) is fixedly connected to the output end of the stirring motor (14), a plurality of stirring paddles (16) are fixedly connected to the stirring shaft (15), and the lower end of the stirring shaft (15) is located above the first air pipe (3) and the second air pipe (4).

2. The spirulina cultivation liquid carbon source supplementing device according to claim 1, characterized in that: A one-way valve (17) is installed on the gas supply pipe (6) and the circulation pipe (7).

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