Biological carbon sequestration reaction system

Abstract

The utility model relates to the technical field of biological carbon sequestration, in particular to a biological carbon sequestration reaction system, which comprises a micro-nano bubble aeration device used for generating a micro-nano bubble solution and conveying the micro-nano bubble solution into a mixing tank; the mixing tank is used for mixing the micro-nano bubble solution and the microalgae solution entering the mixing tank and then conveying the mixed solution into the buffer column; and the buffer column comprises circulating equipment which is used for circularly conveying the mixed liquid at the bottom of the buffer column into the buffer column through a reactor pipeline. By applying the biological carbon sequestration reaction system, a micro-nano bubble solution can be generated through the micro-nano bubble aeration device, a microalgae solution of the micro-nano bubble solution entering the mixing tank can be mixed through the mixing tank, and the mixed solution is conveyed into the buffer column; the mixed liquid at the bottom of the buffer column can be circularly conveyed through a reactor pipeline by virtue of circulating equipment, so that in practical application, the photosynthesis and respiration of microalgae can be effectively promoted, and the activity and growth speed of the microalgae are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of biological carbon fixation, in particular to a biological carbon fixation reaction system. Background Art

[0002] Biological carbon sequestration refers to the conversion of carbon dioxide into carbohydrates through plant photosynthesis, which is then fixed in the plant body or soil in the form of organic carbon, thereby reducing carbon dioxide in the atmosphere. Biological carbon sequestration mainly includes plant carbon sequestration, soil carbon sequestration, and ocean carbon sequestration. Taking plant carbon sequestration as an example, aquatic plants occupy an important position among various carbon-fixing plants. Aquatic plant carbon sequestration has the advantages of simplicity and high efficiency, which is conducive to the rapid recovery and reconstruction of the aquatic ecological environment. For aquatic plant microalgae, carbon dioxide is efficiently dissolved in water in the form of micro-nano bubbles, and as the carbon dioxide concentration in the water increases, it also promotes their growth. Current research is mostly based on the premise of simply enriching plants with carbon dioxide to promote the increase in plant and algae production, while there is less research and application of the synergistic research on carbon dioxide micro-nano aeration technology and biological carbon sequestration photoreaction technology.

[0003] Therefore, there is an urgent need for a biological carbon fixation reaction system to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the prior art lacks a biological carbon fixation system or the existing biological carbon fixation system has a poor carbon fixation effect, and to provide a biological carbon fixation reaction system.

[0005] The technical solution of the utility model is as follows:

[0006] A biological carbon fixation reaction system includes a micro-nano bubble aeration device for generating a micro-nano bubble solution and delivering it to a mixing tank;

[0007] A mixing tank is used to mix the micro-nano bubble solution and the microalgae solution entering the mixing tank and then transport them into the buffer column;

[0008] The buffer column comprises a circulation device for circulating the mixed liquid at the bottom of the buffer column to the interior thereof through a reactor pipeline.

[0009] Preferably, the micro-nano bubble aeration device includes a ceramic membrane bubble reactor, a carbon dioxide gas cylinder for supplying gas to the ceramic membrane bubble reactor, and a water storage tank for supplying water, and the ceramic membrane bubble reactor is connected to the mixing tank.

[0010] Preferably, a regulating valve and a gas flow meter are sequentially provided on the connecting pipeline between the carbon dioxide cylinder and the ceramic membrane bubble reactor; a water pump and a liquid flow meter are sequentially provided on the connecting pipeline between the water storage tank and the ceramic membrane bubble reactor.

[0011] Preferably, a temperature sensor and a pH sensor are provided on the reactor pipe, and both the temperature sensor and the pH sensor are electrically connected to a PLC control system.

[0012] Preferably, an air pump is provided on the reactor pipeline for blowing air into the mixed liquid; the air pump is electrically connected to the PLC control system.

[0013] Preferably, a reserved opening is provided on the reactor pipe for cleaning the pipe.

[0014] Preferably, the reactor pipe is a spiral pipe.

[0015] Preferably, a drain pipe is connected to the connection port between the reactor pipe and the bottom of the buffer column, for draining the mixed liquid in the buffer column into a liquid storage tank.

[0016] Preferably, the ceramic membrane bubble reactor is made of alumina; the reactor pipe is made of quartz; and the buffer column is made of organic glass.

[0017] Preferably, the circulation device is a circulation pump, and the circulation pump is electrically connected to a PLC control system.

[0018] Compared with the prior art, the present invention has the following technical effects:

[0019] 1. The micro-nano bubble aeration device can dissolve carbon dioxide in water in the form of micro-nano bubbles. The small size effect enables carbon dioxide to dissolve in water faster and more fully, avoiding the waste of resources caused by carbon dioxide escape in traditional methods.

[0020] 2. Due to the extremely small size of the bubbles, their rising speed is greatly slowed down, which prolongs their residence time in the water body, thereby ensuring the continuous dissolution of carbon dioxide.

[0021] 3. It can realize online control of important parameters such as pH value and temperature of the mixed liquid. Coupled with the micro-nano bubble aeration device, the carbon dioxide micro-nano bubbles generated can penetrate the biological cell membrane, directly provide carbon dioxide for aquatic organisms, promote photosynthesis and respiration, and enhance the activity and growth rate of plants such as microalgae. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the biological carbon fixation reaction system.

[0023] Description of Reference Numerals

[0024] 1. Carbon dioxide cylinder; 2. Regulating valve; 3. Gas flowmeter; 4. Ceramic membrane bubble reactor; 5. Buffer column; 6. Water storage tank; 7. Water transfer pump; 8. Liquid flowmeter; 9. Air pump; 10. Reactor pipeline; 111. First valve; 112. Second valve; 113. Third valve; 12. Circulation pump; 13. Gas valve; 14. Temperature sensor; 15. pH sensor; 16. Reserved port; 17. PLC control system; 18. Bracket; 19. Drain pipe; 20. Liquid storage tank; 21. Mixing tank. DETAILED DESCRIPTION

[0025] The following describes the specific implementation of the embodiment of the present invention in detail. It should be understood that the specific implementation described herein is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0026] The utility model provides a biological carbon fixation reaction system, such as Figure 1 As shown, the biological carbon fixation reaction system includes:

[0027] A micro-nano bubble aeration device, used to generate a micro-nano bubble solution and transport it to the mixing tank 21;

[0028] The mixing tank 21 is used to mix the micro-nano bubble solution and the microalgae solution entering the mixing tank and then transport them to the buffer column 5;

[0029] The buffer column 5 includes a circulation device for circulating the mixed liquid at the bottom of the buffer column 5 to the interior thereof through the reactor pipe 10 .

[0030] Specifically, the circulation device is a circulation pump 12, which is electrically connected to a PLC control system 17. In actual use, under the control of the PLC control system 17, the circulation flow rate of the mixed liquid can be adjusted in real time by the circulation pump 12, thereby promoting the mixing of the algae liquid and the micro-nano bubble solution, improving mass transfer efficiency, and better achieving the cultivation of microalgae. More specifically, the circulation pump 12 is disposed on the reactor pipe 10, and a first valve 111 and a third valve 113 are respectively provided at its ends for regulating the liquid flow in the reactor pipe 10. The first valve 111 and the third valve 113 can be manual valves or electric valves. The reactor pipe 10 is mounted on a bracket 18 to ensure stability.

[0031] According to the above technical solution, based on the biological carbon fixation reaction system, a micro-nano bubble solution can be generated by a micro-nano bubble aeration device, the micro-nano bubble solution and the microalgae solution entering the mixing tank can be mixed by a mixing tank, and the mixed solution can be transported to a buffer column. The mixed solution at the bottom of the buffer column can be circulated through the reactor pipeline by a circulation device. Therefore, in actual application, based on the circulation culture, the photosynthesis and respiration of microalgae can be promoted, their activity and growth rate can be enhanced, and the carbon fixation efficiency can be improved.

[0032] In the biological carbon fixation reaction system described in the present invention, preferably, the micro-nano bubble aeration device includes a ceramic membrane bubble reactor 4 and a carbon dioxide gas cylinder 1 for supplying gas to the ceramic membrane bubble reactor 4 and a water storage tank 6 for supplying water, and the ceramic membrane bubble reactor 4 is connected to the mixing tank 21.

[0033] Further preferably, a regulating valve 2 and a gas flow meter 3 are sequentially provided on the connecting pipeline between the carbon dioxide cylinder 1 and the ceramic membrane bubble reactor 4; a water pump 7 and a liquid flow meter 8 are sequentially provided on the connecting pipeline between the water storage tank 6 and the ceramic membrane bubble reactor 4.

[0034] In actual application, the carbon dioxide from the carbon dioxide cylinder 1 is pressure-regulated by the regulating valve 2, and after the flow is measured by the gas flowmeter 3, it enters the ceramic membrane bubble reactor 4; at the same time, the water stored in the water storage tank 6 is controlled by the liquid flowmeter 8 through the water pump 7, enters the ceramic membrane bubble reactor 4 and bubbles with carbon dioxide to form a micro-nano bubble solution, and finally the formed micro-nano bubble solution is transported to the mixing tank 21 to be mixed with the microalgae solution. Specifically, under a specific flow rate and pressure, the carbon dioxide gas becomes a dispersed phase through the pores of the ceramic membrane and enters the continuous water phase. Under a specific water flow rate, it is highly mixed and sheared with water to form a micro-nano bubble solution. In a specific embodiment, the material of the ceramic membrane bubble reactor 4 is mainly alumina, with a pore size of 30-60nm, an outer diameter of 10mm, an inner diameter of 8mm, and an effective length of 9cm, so as to better form a micro-nano bubble solution.

[0035] In the biological carbon fixation reaction system described in the present invention, the reactor pipe 10 is preferably provided with a temperature sensor 14 and a pH sensor 15, both of which are electrically connected to a PLC control system 17. In practical applications, under the control of the PLC control system 17, the temperature and pH of the mixed liquid can be obtained in real time, thereby stabilizing the temperature and pH of the mixed liquid within a range suitable for microalgae growth. Specifically, for example, if the pH of the mixed liquid exceeds the normal range, it can be adjusted by adding an appropriate amount of alkali or acid (dilute sodium hydroxide or dilute acetic acid).

[0036] In another preferred embodiment, the reactor pipe 10 is provided with an air pump 9 for blowing air into the mixed liquid; more preferably, the air pump 9 is electrically connected to the PLC control system 17. In actual application, under the control of the PLC control system 17, the amount of air blown into the mixed liquid can be adjusted as needed, thereby further promoting the absorption of carbon dioxide by the algae plants. Specifically, the reactor pipe 10 is also provided with a gas valve 13 for adjusting the air flow in the reactor pipe 10. In a specific embodiment, the air blown into the reactor pipe 10 realizes gas exchange in the buffer column 5. In another specific embodiment, nutrient solution can also be added to the buffer column 5 as needed. Among them, the gas valve 13 is preferably an electric valve.

[0037] In another preferred embodiment, the reactor pipe 10 is provided with a reserved opening 16 for cleaning the pipe. Specifically, a cleaning ball can be placed in the reserved opening 16 to clean the pipe. Sensors can also be added as needed to obtain other indicators that are beneficial to microalgae growth, such as light intensity.

[0038] In another preferred embodiment, the reactor pipe 10 is a spiral tube, thereby further promoting the mixing of the algae solution and the micro-nano bubble solution based on the spiral circulation flow, thereby improving the mass transfer effect.

[0039] In another preferred embodiment, a drain pipe 19 is connected to the connection between the reactor pipe 10 and the bottom of the buffer column 5 to drain the mixed liquid in the buffer column 5 into the liquid storage tank 20. Specifically, a second valve 112 is provided on the drain pipe 19. In actual use, when the mixed liquid does not need to be drained, the second valve 112 is closed by default and is opened only when the mixed liquid needs to be drained. The second valve 112 can be a manual valve or an electric valve.

[0040] In the biological carbon fixation reaction system of the present invention, in one embodiment, the reactor pipe 10 is made of quartz with an outer diameter of 50-80 mm, thereby facilitating the photosynthesis of the microalgae. In another embodiment, the buffer column 5 is made of organic glass with an outer diameter of 150-300 mm, thereby facilitating the photosynthesis of the microalgae.

[0041] The present invention will be described in detail below through embodiments, but the protection scope of the present invention is not limited thereto.

[0042] Example 1

[0043] Use Figure 1The biological carbon fixation reaction system shown is implemented, specifically, the biological carbon fixation reaction system includes:

[0044] A micro-nano bubble aeration device, used to generate a micro-nano bubble solution and transport it to the mixing tank 21;

[0045] The mixing tank 21 is used to mix the micro-nano bubble solution and the microalgae solution entering the mixing tank and then transport them to the buffer column 5;

[0046] The buffer column 5 includes a circulation device for circulating the mixed liquid at the bottom of the buffer column 5 to the interior thereof through the reactor pipe 10; the circulation device is a circulation pump 12, and the circulation pump 12 is electrically connected to the PLC control system 17;

[0047] The micro-nano bubble aeration device includes a ceramic membrane bubble reactor 4 and a carbon dioxide gas cylinder 1 for supplying gas to the ceramic membrane bubble reactor 4 and a water storage tank 6 for supplying water. The ceramic membrane bubble reactor 4 is connected to the mixing tank 21. A regulating valve 2 and a gas flow meter 3 are sequentially provided on the connecting pipeline between the carbon dioxide gas cylinder 1 and the ceramic membrane bubble reactor 4. A water delivery pump 7 and a liquid flow meter 8 are sequentially provided on the connecting pipeline between the water storage tank 6 and the ceramic membrane bubble reactor 4. A temperature sensor 14 and a pH sensor 15 are provided on the reactor pipe 10. and the pH sensor 15 are electrically connected to the PLC control system 17; an air pump 9 is provided on the reactor pipe 10 for blowing air into the mixed liquid; the air pump 9 is electrically connected to the PLC control system 17; a reserved port 16 is provided on the reactor pipe 10 for cleaning the pipe; the connection port between the reactor pipe 10 and the bottom of the buffer column 5 is also connected to a drain pipe 19 for draining the mixed liquid in the buffer column 5 into the liquid storage tank 20; the material of the ceramic membrane bubble reactor 4 is alumina; the material of the reactor pipe 10 is quartz; the material of the buffer column 5 is organic glass.

[0048] In actual use, first, open the first valve 111 and the third valve 113, and close the second valve 112. Next, the micro-nano bubble solution generated by the micro-nano bubble aeration device is mixed with the microalgae solution in the mixing tank 21 and then pumped into the buffer column 5. Then, under the control of the PLC control system 17, a circulation pump repeatedly circulates the mixed solution through the reactor pipe 10 and into the buffer column 5. Simultaneously, the temperature sensor 14 and the pH sensor are controlled to obtain the temperature and pH of the mixed solution in the reactor pipe 10 in real time, controlling the external air flow rate of the aeration pump 9 and the gas valve 13. When the mixed solution needs to be drained, the second valve 112 is opened, and the algae solution is discharged through the drain pipe 19 and collected into the liquid storage tank 20. A reserved opening 16 is provided for inserting a cleaning ball to clean the pipe.

[0049] After testing, it was found that the biological carbon fixation reaction system provided by the utility model can effectively improve the carbon fixation efficiency of microalgae by promoting the photosynthesis of microalgae under the action of micro-nano bubbles, compared with the existing technical solutions.

[0050] Example 2

[0051] The process is carried out with reference to Example 1, except that the reactor pipe 10 is a spiral tube.

[0052] After testing, it was found that the biological carbon fixation reaction system provided by the present invention, compared with the solution in Example 1, can further promote the mixing of algae liquid and micro-nano bubble solution based on spiral circulation flow, thereby improving the mass transfer effect.

[0053] The biological carbon fixation reaction system provided by the utility model can generate a micro-nano bubble solution through a micro-nano bubble aeration device, mix the micro-nano bubble solution and the microalgae solution entering the mixing tank through a mixing tank, and transport the mixed solution to a buffer column. The mixed solution at the bottom of the buffer column can be circulated through the reactor pipeline by a circulation device. Therefore, in actual application, the photosynthesis and respiration of microalgae can be promoted based on the circulation culture, thereby enhancing their activity and growth rate, and thus improving the carbon fixation efficiency.

[0054] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the technical scope of the present invention, various simple variations of the present invention's technical solution are possible. To avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple variations and combinations should also be considered as disclosed herein and fall within the scope of protection of the present invention.

Claims

1. A biological carbon fixation reaction system, characterized in that: The biological carbon fixation reaction system includes: A micro-nano bubble aeration device, used to generate a micro-nano bubble solution and transport it to a mixing tank (21); A mixing tank (21) is used to mix the micro-nano bubble solution and the microalgae solution entering the mixing tank and then transport the mixed solution to the buffer column (5); The buffer column (5) comprises a circulation device for circulating the mixed liquid at the bottom of the buffer column (5) to the interior thereof through a reactor pipe (10).

2. The biological carbon fixation reaction system according to claim 1, characterized in that: The micro-nano bubble aeration device comprises a ceramic membrane bubble reactor (4), a carbon dioxide gas cylinder (1) for supplying gas to the ceramic membrane bubble reactor (4), and a water storage tank (6) for supplying water. The ceramic membrane bubble reactor (4) is connected to the mixing tank (21).

3. The biological carbon fixation reaction system according to claim 2, characterized in that: A regulating valve (2) and a gas flow meter (3) are sequentially provided on the connecting pipeline between the carbon dioxide cylinder (1) and the ceramic membrane bubble reactor (4); a water delivery pump (7) and a liquid flow meter (8) are sequentially provided on the connecting pipeline between the water storage tank (6) and the ceramic membrane bubble reactor (4).

4. The biological carbon fixation reaction system according to any one of claims 1 to 3, characterized in that: The reactor pipe (10) is provided with a temperature sensor (14) and a pH sensor (15), and both the temperature sensor (14) and the pH sensor (15) are electrically connected to a PLC control system (17).

5. The biological carbon fixation reaction system according to claim 4, characterized in that: The reactor pipe (10) is provided with an air pump (9) for blowing air into the mixed liquid; the air pump (9) is electrically connected to the PLC control system (17).

6. The biological carbon fixation reaction system according to claim 4, characterized in that: The reactor pipe (10) is provided with a reserved opening (16) for cleaning the pipe.

7. The biological carbon fixation reaction system according to claim 4, characterized in that: The reactor pipe (10) is a spiral tube.

8. The biological carbon fixation reaction system according to claim 4, characterized in that: The connection between the reactor pipe (10) and the bottom of the buffer column (5) is also connected to a drain pipe (19) for draining the mixed liquid in the buffer column (5) into a liquid storage tank (20).

9. The biological carbon fixation reaction system according to claim 2, characterized in that: The material of the ceramic membrane bubble reactor (4) is alumina; the material of the reactor pipe (10) is quartz; and the material of the buffer column (5) is organic glass.

10. The biological carbon fixation reaction system according to claim 1, characterized in that: The circulation device is a circulation pump (12), and the circulation pump (12) is electrically connected to a PLC control system (17).

Images