Mine microalgae carbon sequestration emission reduction and resource recycling system

Abstract

The invention discloses a mine microalgae carbon sequestration emission reduction and resource recycling system. The system comprises eight modules including a microalgae culture and closed pipeline photobioreactor microalgae culture module, a CO2 capturing and conveying module and a microalgae after-harvesting and processing module. The prepared culture medium and CO2 captured by an air return way are injected into a closed pipeline photobioreactor through a conveying pipeline, and the closed pipeline photobioreactor is provided with various sensors. Monitoring data are uploaded to the intelligent data analysis and optimization module for analysis and processing, and solution filling and environment parameters are intelligently adjusted through the intelligent monitoring and automatic control module; and collecting combustible gas generated by anaerobic fermentation of the microalgae, processing the primarily screened microalgae, and filtering the mine wastewater. According to the method, efficient culture of mine microalgae, efficient emission reduction and resource utilization of CO2 in a mine return airway and cyclic utilization of wastewater can be achieved, the green and low-carbon sustainable development concept is met, and a new solution is provided for the technical field of mine carbon dioxide emission reduction.

Description

Technical Field

[0001] The patent of this invention belongs to the field of carbon dioxide emission reduction technology, and specifically relates to a mine microalgae carbon fixation and emission reduction and resource recycling system. Background Art

[0002] Coal is an important part of China's energy structure. However, the coal industry has long relied on the traditional production model with high carbon emissions, facing the dual challenges of environmental protection and economic development. With the expansion of coal mining scale and the increase in mining depth, the return air lane of the mine, as an important part of the mine ventilation system, contains a large amount of carbon dioxide (CO2) in its exhaust air flow. These CO2 not only aggravates the greenhouse effect, but also causes waste of resources. Therefore, how to effectively reduce the emission of CO2 in the return air lane of the mine and realize its resource utilization is an urgent problem to be solved in the current field of mine ventilation and environmental protection.

[0003] Traditional mine ventilation focuses on air quality and production safety in mines, but pays little attention to the reduction and resource utilization of CO2 in mines. At present, although some technologies attempt to capture and store CO2 through chemical or physical methods, these methods often have problems such as high energy consumption, high cost, and secondary pollution, making them difficult to promote in practical applications.

[0004] In recent years, the microalgae biocarbon fixation technology in mines has attracted widespread attention due to its high efficiency, environmental protection and sustainability. Microalgae can absorb CO2 through photosynthesis and convert it into organic matter, thereby achieving CO2 emission reduction and resource utilization. However, there are still many challenges in applying microalgae biocarbon fixation technology to mine return airways, such as how to efficiently capture CO2 in mine return airways, how to optimize the growth conditions of microalgae to improve its carbon fixation efficiency, and how to achieve intelligent management of microalgae biocarbon fixation systems.

[0005] Therefore, the present invention aims to propose a mine microalgae carbon fixation, emission reduction and resource recycling system, which can achieve efficient emission reduction and resource utilization of CO2 in the mine return airway by integrating advanced CO2 capture technology, microalgae cultivation technology and intelligent management technology, and provide a new solution for the field of mine carbon dioxide emission reduction technology. Summary of the invention

[0006] In view of the shortcomings of existing mine carbon dioxide emission reduction technology, the present invention provides a mine microalgae carbon fixation and emission reduction and resource recycling system, which aims to achieve efficient carbon dioxide emission reduction and carbon fixation in mine air through intelligent cultivation of microalgae, effective capture and utilization of CO2 and filtration and recycling of coal mine wastewater. The specific contents are as follows:

[0007] The mine microalgae carbon fixation and emission reduction and resource recycling system includes a photobioreactor microalgae cultivation module, a CO2 capture and transportation module, a microalgae post-harvest and processing module, a wastewater treatment and recycling module, an energy recovery and utilization module, an intelligent data analysis and optimization module, and a microalgae cultivation intelligent monitoring and automatic control module;

[0008] The photobioreactor microalgae cultivation module and the high-efficiency photosynthesis promotion module include a closed pipeline photobioreactor, an OLED flat-panel light-emitting panel, a light intensity sensor, a temperature sensor, a CO2 concentration sensor, a constant temperature heater, a pH value monitor, a liquid level sensor, an X-shaped fan blade stirring rod, a bioreactor folding line, a bioreactor water outlet, a bioreactor gas outlet, a CO2 input port, a microalgae input port, an electromagnetic valve I, a culture solution input pipeline, a bioreactor pulley, a microalgae collection output pipeline, a bioreactor gas output pipeline, a microalgae filtering device, a stirring impeller, a stirring shaft, a filtering pore, a container cover and a microalgae cultivation device. Culture medium, safety valve I, safety valve II, safety valve III; this module is responsible for designing and optimizing the microalgae culture conditions and the closed pipeline photobioreactor structure to increase the growth rate of microalgae and CO2 fixation efficiency, and provide the best growth environment for microalgae by precisely controlling light, temperature, nutrient solution, pH and other conditions; two OLED flat-panel light-emitting panels are installed and placed in front and behind the top of the bioreactor to ensure uniform light in all parts of the culture container to avoid local excessive or weak light. The light intensity sensor, temperature sensor, CO2 concentration sensor, constant temperature heater, pH monitor and liquid level sensor are installed on the side walls of the bioreactor respectively.

[0009] The CO2 capture and transportation module includes a CO2 capture device, a ventilation impeller fan, a CO2 adsorption plate, a CO2 capture vent, a CO2 capture output pipeline, and a CO2 storage tank; the module is responsible for efficiently capturing CO2 from the return air lane of the mine and transporting it to the closed pipeline photobioreactor through a safety valve III. By adopting advanced CO2 capture technology, efficient separation and enrichment of CO2 is achieved, ensuring the stability and safety of CO2 during the transportation process.

[0010] The wastewater treatment and recycling module comprises a wastewater tank, a pressure gauge, a wastewater input pipeline I, a wastewater input pipeline II, a circulating water pump, a solenoid valve II, a filter inlet, a biological filter, a fine filter screen, a water-blocking plate, a porous biological filter material, a filter outlet, an output water pipeline, a solenoid valve III, a blower, a main air supply pipeline, a branch air supply pipeline and a filter outlet; the module is responsible for treating and recycling the wastewater generated during the microalgae cultivation process, removing harmful substances in the wastewater through the biological filter to make it meet the discharge standard, and at the same time, recycling the treated wastewater for microalgae cultivation to achieve water resource conservation and recycling.

[0011] The microalgae post-harvest and processing module and the energy recovery and utilization module include primary screening, drying, extraction, constant temperature oscillation in water area, high-speed centrifugation of the collected microalgae, and finally drying the upper organic phase after centrifugation to obtain surfactants, biofertilizers, microalgae oil or other biomass products; when the microalgae are photosynthetically autotrophically cultured and heterotrophically cultured, the module is responsible for the harvesting and subsequent processing of the microalgae, the synergistic part of the photosynthetic autotrophic culture enhances aerobic respiration, the heterotrophic culture enhances the Calvin cycle, and the microalgae cultured in the mixed nutrition mode has a higher yield.

[0012] The intelligent data analysis and optimization module includes communication cable I, OMEGA data acquisition instrument, communication cable II, network switch, uplink data transmission line, data processing analysis and optimization device, downlink data transmission line; the module collects and analyzes various data in the system, such as microalgae growth data, CO2 concentration data, culture liquid level height, etc., to monitor and evaluate the system operation status in real time, and then optimizes and adjusts the system operation parameters based on the data analysis results to improve the stability and operation efficiency of the system.

[0013] The microalgae cultivation intelligent monitoring and automatic control module includes an intelligent controller, a main circuit solenoid valve, a servo motor, a special cable, and a communication cable III; the module uses sensors and an automatic control system to monitor key parameters such as light intensity, temperature, pH value, etc. in the microalgae cultivation process in real time, and automatically adjusts the cultivation conditions according to a preset control strategy to ensure that the microalgae grows in the best state. Through remote monitoring and fault diagnosis functions, remote management and maintenance of the system are achieved.

[0014] The photobioreactor microalgae cultivation module and the high-efficiency photosynthesis promotion module transmit the data monitored by the light intensity sensor, temperature sensor, CO2 concentration sensor, pH value monitor, and liquid level sensor in the closed pipeline photobioreactor to the intelligent data analysis and optimization module through the communication cable I, and upload the processed and optimized monitoring data information to the microalgae cultivation intelligent monitoring and automatic control module through the downlink data transmission line.

[0015] The closed pipeline photobioreactor is foldable and movable, and is made of a transparent material such as reinforced glass or polymer plastic with a light transmittance of more than 85%, with a size of 3m×2m×3m; the light intensity of the OLED flat-panel light-emitting panel is controlled at 200-800 μmol photons m -2 s -1 Choose one or both of the blue or red light bands, set the light intensity sensor to 12 to 16 hours and the dark intensity sensor to 0 to 3000 μmol photons m -2 s -1, with an accuracy of ±2% and a resolution of 1 μmol photons m -2 s -1 ; The temperature sensor has a measuring range of 5-50℃, an accuracy of ±0.1℃, and a resolution of 0.01℃; the CO2 concentration sensor has a measuring range of 0-5000ppm, an accuracy of ±2% FS (Full Scale), and a response time of less than 90 seconds; the constant temperature heater has a temperature control range of 20-40℃, maintaining the temperature in the closed pipeline photobioreactor at 20-30℃, an accuracy of ±0.5℃, and a heating power of 1-10kW; the pH value monitor has a monitoring range of 6-8pH, an accuracy of ±0.01pH, and a resolution of 0.001pH, maintaining the pH in the closed pipeline photobioreactor at about 7; the liquid level sensor has a monitoring range of 0-2m. When the liquid level approaches 2m, the intelligent controller will control the solenoid valve to automatically close the culture medium input pipeline, with an accuracy of ±1mm and a resolution of 0. 1mm; the length of the X-blade stirring rod is 2m, the diameter of the stirring shaft is 40-50mm, the length of the fan is 50-60mm, the width is 90-100mm, and the fan-shaped arc is 20-30°; the diameter of the water outlet of the bioreactor is 70-80mm; the diameter of the gas outlet of the bioreactor is 10-20mm; the diameter of the CO2 input port is 20-30mm; the diameter of the microalgae input port is 70-80mm; the diameter of the culture medium input pipeline is 70-80mm; the diameter of the microalgae collection output pipeline is 70-80mm; the diameter of the bioreactor gas output pipeline is 10-20mm, and it is output along the top of the return air channel.

[0016] The microalgae filtering device has a diameter of 0.8m and a height of 1.5m; the stirring impeller is 100mm long, 50mm wide, and has an arc of 10-20°. The middle is hollowed out in a "R" shape to allow the microalgae to circulate better and have a better stirring effect; the stirring shaft is 1m long and has a diameter of 40-50mm; and the filtration pore diameter is 20mm.

[0017] The microalgae culture medium is prepared into BG11 culture medium by using the coal mine wastewater treated by the wastewater treatment and recycling module, inorganic salts, trace elements and other nutrients according to the BG11 culture medium preparation method. BG11 culture medium is a culture medium specially used for culturing freshwater cyanobacteria (blue-green algae) and protozoa.

[0018] The CO2 capture and delivery module captures CO2 in the return airway air by selectively adsorbing the CO2 through the adsorption material, then desorbing and collecting the CO2 through the high temperature and high pressure method, and storing the collected CO2 in the CO2 storage tank and injecting it into the closed pipeline photobioreactor through the CO2 input port; the CO2 capture device has a specification of 1.5m×0.5m×2m; the porous adsorption material arranged on the CO2 adsorption plate is usually MOF SOne of an adsorbent material, a porous carbon material or a fibrous adsorbent material.

[0019] The biological filter tank filters the wastewater in multiple stages and then discharges it to the microalgae culture medium through the filter tank drain port. The fine filter screen is one of polystyrene balls, microporous plastics or activated carbon. The porous biological filter material is one of biological ceramsite filter material, porous spherical suspended biological filter material, and mineral porous biological filter material. The porous biological filter material can effectively promote the attachment and growth of microorganisms and improve the sewage treatment efficiency due to its special physical and chemical properties. The blower sends the blown air into the fine filter screen pool and the biological filter material pool through the main air supply pipeline and the branch air supply pipeline in turn.

[0020] The microalgae post-harvest and processing module and the energy recovery and utilization module have a drying temperature of 35-45° C., an extractant selected from petroleum ether-ethanol, a solvent ratio of 2:1, a liquid-to-solid ratio of 1:5, constant temperature oscillation for 12-24 hours in the water area at a temperature of 40-45° C. and a rotation speed of 220 r / min, centrifugation for 10 minutes at 800-1000 rpm, and then preparation of surfactants, biofertilizers or microalgae oil according to the required biomass product preparation process.

[0021] The data monitored by various sensors in the closed pipeline photobioreactor are transmitted to the OMEGA data acquisition instrument through the communication cable I, the collected data are uploaded to the network switch through the communication cable II, and then the data are transmitted to the data processing, analysis and optimization device through the uplink data transmission line, and the processed data are transmitted to the microalgae cultivation intelligent monitoring and automatic control module through the downlink data transmission line; the data processing, analysis and optimization device includes a plurality of monitoring software models, each software model adopts a modular structure, and each module can independently execute different monitoring function modes to obtain the cultivation status of the entire microbial bioreactor.

[0022] The intelligent controller is connected to solenoid valve I, solenoid valve II, solenoid valve III and the main circuit solenoid valve respectively, and is powered by a servo motor. The intelligent controller is a modular structure, and operation instructions are pre-stored internally. The liquid delivery and the opening and closing degree of the pipeline solenoid valve are controlled through digital input and output.

[0023] Compared with the prior art, the present invention has the following innovative features:

[0024] 1. System integration and intelligent management. The present invention innovatively integrates multiple links such as microalgae cultivation, CO2 capture, wastewater treatment, and energy recovery into an intelligent system, realizing a closed-loop resource recycling from CO2 capture to microalgae cultivation, harvesting, wastewater treatment, and energy recovery. Through the intelligent data analysis and optimization module, the system can monitor the operating status in real time, automatically adjust the operating parameters, optimize the system performance, and improve the overall operating efficiency and stability.

[0025] 2. Innovation in microalgae cultivation and closed-pipe photobioreactor design. In terms of microalgae cultivation and closed-pipe photobioreactor design, the present invention adopts an innovative closed-pipe photobioreactor structure and culture condition optimization strategy to improve the growth rate of microalgae and CO2 fixation efficiency. By precisely controlling conditions such as light, temperature, and nutrients, an optimal growth environment is provided for microalgae, thereby achieving efficient carbon fixation and resource utilization.

[0026] 3. Efficient CO2 capture and transportation technology. The present invention adopts CO2 capture technology, which can efficiently capture CO2 from the mine return airway and transport it to the closed pipeline photobioreactor. This technology not only improves the CO2 capture efficiency, but also ensures the stability and safety of CO2 during the transportation process, providing sufficient carbon source for microalgae cultivation.

[0027] 4. Innovation of wastewater treatment and recycling technology. The present invention adopts biological filter wastewater treatment and recycling technology for wastewater generated during the cultivation of microalgae. The fine mesh biological filter effectively removes harmful substances in the wastewater, achieves standard discharge and recycling of wastewater, saves water resources, and reduces environmental pollution.

[0028] 5. Breakthrough in energy recovery and utilization technology. The present invention has achieved a breakthrough in energy recovery and utilization technology. By recycling and utilizing the combustible gas produced by anaerobic fermentation of microalgae for power generation, for the system's own use or external supply, the system's energy consumption is reduced and energy utilization efficiency is improved. At the same time, anaerobic fermentation of microalgae will not destroy the algae oil in the microalgae cells, so the fermented microalgae can be used to extract algae oil or prepare the required surfactants and other biomass products. This innovation not only helps to reduce the system's operating costs, but also conforms to the concept of green, low-carbon sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the composition of the mine microalgae carbon fixation, emission reduction and resource recycling system;

[0030] Figure 2 It is a schematic diagram of microalgae cultivation and closed pipeline photobioreactor and efficient photosynthesis promotion module;

[0031] Figure 3 is a front cross-sectional schematic diagram of a microalgae cultivation and filtration device;

[0032] Figure 4 It is a schematic diagram of the CO2 capture and transportation module;

[0033] Figure 5 It is a schematic diagram of the wastewater treatment and recycling module;

[0034] Figure 6It is a schematic diagram of the microalgae harvesting, processing, energy recovery and utilization module;

[0035] Figure 7 It is a module for intelligent data analysis, optimization and automatic control of microalgae cultivation;

[0036] In the figure, A—microalgae cultivation module of photobioreactor, B—CO2 capture and transportation module, C—high-efficiency photosynthesis promotion module, D—microalgae post-harvest and processing module, E—wastewater treatment and recycling module, F—energy recovery and utilization module, G—intelligent data analysis and optimization module, H—microalgae cultivation intelligent monitoring and automatic control module, 1-1—closed pipeline photobioreactor, 1-2—OLED flat-panel light-emitting panel, 1-3—light intensity sensor, 1-4—temperature sensor, 1-5—CO2 concentration sensor, 1-6—constant temperature heater, 1-7—pH value monitor, 1-8— Liquid level sensor, 1-9—X-shaped fan blade stirring rod, 1-10—bioreactor folding line, 1-11—bioreactor water outlet, 1-12—bioreactor gas outlet, 1-13—CO2 input port, 1-14—microalgae input port, 1-15—solenoid valve I, 1-16—culture fluid input pipeline, 1-17—bioreactor pulley, 1-18—microalgae collection output pipeline, 1-19—bioreactor gas output pipeline, 1-20—safety valve I, 1-21—safety valve II, 1-22—safety valve III, 2-1—microalgae filtration device, 2-2—stirring impeller, 2-3—stirring axis, 2-4—filtration pores, 2-5—container cover, 3—microalgae culture medium, 4-1—CO2 capture device, 4-2—ventilation impeller fan, 4-3—CO2 adsorption plate, 4-4—CO2 capture box vent, 4-5—CO2 capture output pipeline, 4-6—CO2 storage tank, 5-1—wastewater tank, 5-2—pressure gauge, 5-3—wastewater input pipeline I, 5-4—wastewater input pipeline II, 5-5—circulating water pump, 5-6—solenoid valve II, 5-7—filter inlet, 5-8—biological filter, 5-9—fine filter, 5-10—water barrier, 5-11—porous biological filter material, 5- 12—filter tank water outlet, 5-13—water output pipeline, 5-14—solenoid valve III, 5-15—blower, 5-16—main air supply pipeline, 5-17—branch air supply pipeline, 5-18—filter tank drain outlet, 6-1—communication cable I, 6-2—OMEGA data acquisition instrument, 6-3—communication cable II, 6-4—network switch, 6-5—uplink data transmission line, 6-6—data processing, analysis and optimization device, 6-7—downlink data transmission line, 7-1—intelligent controller, 7-2—main circuit solenoid valve, 7-3—servo motor, 7-4—special cable, 7-5—communication cable III. DETAILED DESCRIPTION

[0037] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings:

[0038] First, if Figures 2 to 4 As shown, the microalgae culture medium is prepared and CO2 is captured and collected. 2 / 3 of the volume of the culture medium container is added to the microalgae culture medium 3, and the coal mine wastewater treated by the wastewater treatment and recycling module E is added, and then appropriate amounts of NaNO3 1500 mg / L, K2HPO4 40 mg / L, Mg 2+ and Ca 2+ A high concentration solution is prepared using powder. After dissolution, the pH of the culture medium needs to be adjusted to about 7.1 with a 1M HCl solution. The medium is filtered and sterilized with a 0.2μm filter membrane to prepare a BG11 culture medium. The BG11 culture medium is a culture medium specifically used for Microcystis aeruginosa, Microcystis aquaeum, and Chlorella (green algae). The prepared culture medium is injected into the closed pipeline photobioreactor 1-1 through the culture liquid input pipeline 1-16; the CO2 in the return airway air is selectively adsorbed by the adsorption material. The porous adsorption material arranged on the CO2 adsorption plate is usually selected from MOF S One of the adsorption materials, porous carbon materials or fiber adsorption materials, the ventilation impeller fan 4-2 discharges the CO2-free air out of the CO2 capture device 4-1, the CO2 capture device has a specification of 1.5m×0.5m×2m, and CO2 is desorbed and collected by high temperature and high pressure method, and the collected CO2 is stored in the CO2 storage tank 4-6, and finally injected into the closed pipeline photobioreactor through the CO2 input port 1-13.

[0039] Secondly, if Figure 1 and Figure 5 As shown, the microalgae are cultured and the microalgae products are processed. In the present invention, the microalgae selected is Chlorella, which is shade-tolerant, temperature-tolerant, fast-growing, and highly adaptable to the environment, and is suitable for growing in the underground environment of a coal mine. The selected Chlorella is injected into the closed pipeline photobioreactor 1-1 through the microalgae input port 1-14. The closed pipeline photobioreactor 1-1 uses reinforced glass with a light transmittance of 90%, and has a specification of 3m×2m×3m. The light intensity of the OLED flat-panel light-emitting panel 1-2 is controlled at 600μmol photons m -2 s -1 , select the blue light band, set 16 h light and 12 h dark, and light sensors 1-3 measure 1000 μmol photons m -2 s -1 , with an accuracy of ±2% and a resolution of 1 μmol photons m -2 s -1The temperature sensor 1-4 has a monitoring range of 25-35°C, an accuracy of ±0.1°C, and a resolution of 0.01°C; the CO2 concentration sensor 1-5 has a monitoring range of 1000-2000ppm, an accuracy of ±2% FS (Full Scale), the response time is 40 seconds, the constant temperature heater 1-6 has a temperature control range of 20-40℃, maintains the temperature in the closed pipeline photobioreactor 1-1 at about 25℃, and the accuracy is ±0.5℃. The heating power is 5kW, the pH monitor 1-7 has a monitoring range of 6-8pH, an accuracy of ±0.01pH, and a resolution of 0.001pH, and maintains the pH in the closed pipeline photobioreactor 1-1 at about 7. The liquid level sensor 1-8 monitors the liquid level upper limit of 2m. When the liquid level approaches 2m, the intelligent controller 7-1 will control the solenoid valve to automatically close the culture medium input pipeline. The X-shaped fan stirring rod 1-9 has a length of 2m, a stirring shaft diameter of 45mm, a fan length of 55mm, a width of 90mm, and a fan arc of 25°. The diameter of the bioreactor outlet 1-11 is 75mm, the diameter of the bioreactor outlet 1-12 is 15mm, and the CO2 input port 1-13 and the microalgae input port 1-14 are arranged in the closed pipeline photobioreactor. The diameters of the reactor 1-1 and the top are on the same side, respectively, 25 mm and 70 mm, the diameter of the culture solution input pipe 1-16 is 70-80 mm, the diameter of the microalgae collection output pipe 1-18 is 75 mm, and the diameter of the bioreactor gas output pipe 1-19 is 15 mm. The combustible gas produced by the anaerobic fermentation of the microalgae is output along the top of the return air tunnel to the outside of the mine for use. After the anaerobic fermentation of the microalgae, the microalgae are recovered through the filtering device 2-1, and the recovered microalgae are screened for advancedness, dried at a temperature of 40°C for 12 hours, and after drying, an extractant is added to the algae powder after enzymolysis, and the extractant is selected as petroleum ether-ethanol, the solvent ratio is 2:1, and the liquid-to-solid ratio is 1:5. The extractant is shaken in a constant temperature water area at a temperature of 45°C and a speed of 220r / min for 24 hours, and then centrifuged at 1000rpm for 10 minutes. Finally, the upper organic phase after centrifugation is dried at a temperature of 40°C for 12 hours, and then surfactants, biofertilizers or microalgae oil are prepared according to the required biomass product process.

[0040] Then, if Figure 6As shown, the wastewater in the culture process and the coal mine wastewater are transported to the wastewater tank 5-1 through the wastewater input pipe Ⅰ5-3, the pressure gauge 5-2 monitors the water pressure of the wastewater tank 5-1 to prevent the water pressure from being too high, and the water in the wastewater tank 5-1 is transported to the fine filter 5-9 pool through the wastewater input pipe Ⅱ5-4, the circulating water pump 5-5 and the filter tank inlet 5-7. The solenoid valve Ⅱ5-6 is connected to the circulating water pump 5-5 on the wastewater input pipe Ⅱ5-4. After the primary filtration in the fine filter 5-9 pool, the primary filtered water automatically flows into the biological filter 5-8 and passes through The three-time porous biological filter material 5-11 filters and removes impurities and harmful substances in the water. Part of the filtered water is transported to the microalgae culture medium 3 for use through the filter tank drain port 5-18, and part of the water is transported to the wastewater tank 5-1 through the output water pipeline 5-13 under the control of the solenoid valve III 5-14. The blower 5-15 introduces air into the biological filter 5-8 through the main air supply pipeline 5-16 and the branch air supply pipeline 5-17. The solenoid valve II 5-6 and the solenoid valve III 5-14 are connected with the main solenoid valve 7-2 to control the pipeline water flow and the total water volume of the biological filter.

[0041] Finally, if Figure 7 As shown, the data monitored by various sensors in the closed pipeline photobioreactor 1-1 are transmitted to the OMEGA data acquisition instrument 6-2 through the communication cable I 6-1, and the collected data are uploaded to the network switch 6-4 through the communication cable II 6-2, and then the data are transmitted to the data processing analysis and optimization device 6-6 through the uplink data transmission line 6-5, and the processed data are transmitted to the intelligent controller 7-1 through the downlink data transmission line 6-7. The intelligent controller 7-1 is respectively connected to the solenoid valve I 1-15, the solenoid valve II 5-6, the solenoid valve III 5-14 and the main circuit solenoid valve 7-2 The servo motor 7-3 supplies power. The data processing, analysis and optimization device 6-6 includes multiple monitoring software models. Each software model adopts a modular structure. Each module independently executes a different monitoring function mode to obtain the cultivation status of the entire closed pipeline photobioreactor 1-1. The intelligent controller 7-1 is a modular structure with pre-stored operation instructions. It controls the liquid delivery and the opening and closing degree of the pipeline solenoid valve through digital input and output. The data processing, analysis and optimization device 6-6 is arranged in a return air channel with a larger spatial position to ensure that the decision-making analysis process is not affected by external electromagnetic interference.

[0042] In the description of the invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “top”, “bottom”, “inside”, “outside”, “axial”, “radial” and “circumferential” are based on the orientations or positional relationships shown in the drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0043] In the invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0044] It should be further noted that the specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described, or replace them in a similar manner, without departing from the spirit of the present invention or the scope defined in the claims.

Claims

1. A mine microalgae carbon fixation, emission reduction and resource recycling system, characterized in that: It includes a photobioreactor microalgae cultivation module (A), a CO2 capture and transportation module (B), a microalgae post-harvest and processing module (D), a wastewater treatment and recycling module (E), an energy recovery and utilization module (F), an intelligent data analysis and optimization module (G), and a microalgae cultivation intelligent monitoring and automatic control module (H); The photobioreactor microalgae cultivation module (A) and the high-efficiency photosynthesis promotion module (C) include a closed pipeline photobioreactor (1-1), a microalgae filtration device (2-1), and a microalgae culture medium (3); The closed pipeline photobioreactor (1-1) has OLED flat-plate light-emitting panels (1-2) installed at the front and rear of the top, a CO2 input port (1-13) and a microalgae input port (1-14) arranged on the left side of the top, and safety valves III (1-22) and II (1-21) respectively installed near the tail ends of the CO2 input port (1-13) and the microalgae input port (1-14); a light intensity sensor (1-3) and a temperature sensor (1-4) are installed at the rear side, and a bioreactor gas outlet (1-12) is arranged, and the bioreactor gas outlet (1-12) is provided. The gas port (1-12) is connected to the bioreactor gas output pipeline (1-19) and is installed with a safety valve I (1-20); a CO2 concentration sensor (1-5) is installed on the upper right side, and a constant temperature heater (1-6) and a pH value monitor (1-7) are installed on the lower side; a liquid level sensor (1-8) is installed on the front side; X-shaped fan blade stirring rods (1-9) are arranged at both ends of the interior; a bioreactor folding line (1-10) is arranged on the bottom symmetry axis, two bioreactor water outlets (1-11) are arranged on the front right side of the bottom, and bioreactor pulleys (1-17) are installed at the four corners of the bottom; The microalgae filtering device (2-1) is located inside the closed pipeline photobioreactor (1-1), a container cover (2-5) is arranged on the top and connected to the microalgae collection and output pipeline (1-18), a stirring shaft (2-3) is arranged inside and connected to the X-shaped fan blade stirring impeller (2-2), and a filtering pore (2-4) is arranged on the outside; The microalgae culture medium (3) is input into the closed pipeline photobioreactor (1-1) from the left side through the culture liquid input pipeline (1-16), and a solenoid valve I (1-15) is installed; The CO2 capture and transport module (B) comprises a CO2 capture device (4-1); a ventilation impeller fan (4-2) is installed at the rear side of the CO2 capture device (4-1), a CO2 adsorption plate (4-3) is installed inside, a CO2 capture vent (4-4) is arranged at the front side, and the right side is connected to a CO2 storage tank (4-6) via a CO2 capture output pipeline (4-5); The wastewater treatment and recycling module (E) comprises a wastewater tank (5-1), a biological filter (5-8), and a blower (5-15); The wastewater tank (5-1) is provided with a pressure gauge (5-2) on the top thereof and connected to the wastewater input pipe I (5-3); the right side is connected to the biological filter (5-8) through the wastewater input pipe II (5-4) and the filter inlet (5-7), and is provided with a circulating water pump (5-5) and a solenoid valve II (5-6); The left side of the biological filter (5-8) is connected to the output water pipeline (5-13) through the filter outlet (5-12) to output to the wastewater tank (5-1), and a solenoid valve III (5-14) is installed; the interior is divided into four stages of filtration by a water-blocking plate (5-10), the first stage of filtration is provided with a fine filter (5-9), and the second, third and fourth stages are provided with porous biological filter materials (5-11); the top is provided with a filter drain (5-18), which is connected to the blower (5-15) through an air supply branch pipeline (5-17) and an air supply main pipeline (5-16); The microalgae post-harvest and processing module (D) and the energy recovery and utilization module (F) include primary screening, drying, extraction, constant temperature oscillation in water area, high-speed centrifugation of the collected microalgae, and drying the upper organic phase after centrifugation to obtain surfactants, biofertilizers, microalgae oil or other biomass products; The intelligent data analysis and optimization module (G) comprises a communication cable I (6-1), an OMEGA data acquisition instrument (6-2), a communication cable II (6-3), a network switch (6-4), an uplink data transmission line (6-5), a data processing analysis and optimization device (6-6), and a downlink data transmission line (6-7); The microalgae cultivation intelligent monitoring and automatic control module (H) comprises an intelligent controller (7-1), a main circuit electromagnetic valve (7-2), a servo motor (7-3), a special cable (7-4), and a communication cable III (7-5).

2. The mine microalgae carbon fixation, emission reduction and resource recycling system according to claim 1 is characterized in that: The photobioreactor microalgae cultivation module (A) and the high-efficiency photosynthesis promotion module (C) transmit the data monitored by the light intensity sensor (1-3), the temperature sensor (1-4), the CO2 concentration sensor (1-5), the pH value monitor (1-7), and the liquid level sensor (1-8) in the closed pipeline photobioreactor (1-1) to the intelligent data analysis and optimization module (G) through the communication cable I (6-1), and upload the processed and optimized monitoring data information to the microalgae cultivation intelligent monitoring and automatic control module (H) through the downlink data transmission line (6-7).

3. The mine microalgae carbon fixation, emission reduction and resource recycling system according to claim 1 is characterized in that: The closed pipeline photobioreactor (1-1) is foldable and movable, and is made of glass fiber reinforced plastic (FRP) transparent material with a light transmittance of more than 85%, with a specification of 3m×2m×3m; the light intensity of the OLED flat-panel light-emitting panel (1-2) is controlled at 200-800 μmol photons m -2 s -1 A combination of blue light and red light is selected, and 12 to 16 hours of light and 8 to 12 hours of darkness are set; the measurement range of the light intensity sensor (1-3) is 0 to 3000 μmol photons m -2 s -1 , with an accuracy of ±2% and a resolution of 1 μmol photons m -2 s -1 The temperature sensor (1-4) has a measuring range of 5 to 50°C, an accuracy of ±0.1°C, and a resolution of 0.01°C; the CO2 concentration sensor (1-5) has a measuring range of 0 to 5000ppm, an accuracy of ±2% FS (Full Scale), the response time is less than 90 seconds; the constant temperature heater (1-6) has a temperature control range of 20 to 40°C, maintains the temperature in the closed pipeline photobioreactor (1-1) at 20 to 30°C, has an accuracy of ±0.5°C, and a heating power of 1 to 10kW; the pH value monitor (1-7) has a monitoring range of 6 to 8pH, an accuracy of ±0.01pH, and a resolution of 0.001pH, and maintains the pH in the closed pipeline photobioreactor (1-1) at about 7; the liquid level sensor (1-8) has a monitoring range of 0 to 2m, an accuracy of ±1mm, and a resolution of 0.1mm. When the liquid level approaches 2m, the intelligent controller (7-1) controls the solenoid valve (1-15) to automatically close the culture medium input pipeline (1-16); the X-shaped fan blade stirring rod (1-9) has a length of 2m and a stirring shaft diameter of 40 ~50mm, the length of the X-shaped fan blade is 50~60mm, the width is 90~100mm, and the fan-shaped curvature is 20~30°; the diameter of the water outlet (1-11) of the bioreactor is 70~80mm; the diameter of the gas outlet (1-12) of the bioreactor is 10~20mm; the diameter of the CO2 input port (1-13) is 20~30mm, connected to the safety valve III (1-22); the diameter of the microalgae input port (1-14) is 70~80mm, connected to the safety valve II (1-21); the diameter of the culture liquid input pipeline (1-16) is 70~80mm; the diameter of the microalgae collection output pipeline (1-18) is 70~80mm; the diameter of the bioreactor gas output pipeline (1-19) is 10~20mm, connected to the safety valve I (1-20), and output along the top of the return air channel.

4. The mine microalgae carbon fixation, emission reduction and resource recycling system according to claim 1 is characterized in that: The microalgae filtering device (2-1) has a diameter of 0.8m and a height of 1.5m; the stirring impeller (2-2) has a length of 100mm, a width of 50mm, an arc of 10-20°, and a hollow "X" shape in the middle; the stirring shaft (2-3) has a length of 1m and a diameter of 40-50mm; and the filtering pore (2-4) has a diameter of 20mm.

5. The mine microalgae carbon fixation, emission reduction and resource recycling system according to claim 1 is characterized in that: The microalgae culture medium (3) is prepared into a BG11 culture medium by using the coal mine wastewater treated by the wastewater treatment and recycling module (E), inorganic salts, trace elements and other nutrients according to the BG11 culture medium preparation method.

6. The mine microalgae carbon fixation, emission reduction and resource recycling system according to claim 1 is characterized in that: The CO2 capture and transport module (B) captures CO2 in the return airway air by selectively adsorbing the CO2 through an adsorption material, and then desorbing and collecting the CO2 through a high temperature and high pressure method; the CO2 capture device (4-1) has a specification of 1.5m×0.5m×2m; the porous adsorption material arranged on the CO2 adsorption plate (4-3) is usually selected from MOF S Adsorbent material MIL-53.

7. The mine microalgae carbon fixation, emission reduction and resource recycling system according to claim 1 is characterized in that: The biological filter (5-8) filters the coal mine wastewater in multiple stages and then discharges it to the microalgae culture medium (3) through the filter outlet (5-18); the fine filter (5-9) is a polystyrene ball; and the porous biological filter material (5-11) is a mineral porous biological filter material.

8. The mine microalgae carbon fixation, emission reduction and resource recycling system according to claim 1 is characterized in that: After the microalgae is harvested, it is subjected to a processing module (D) and an energy recovery and utilization module (F), the drying temperature is 35-45°C, petroleum ether-ethanol is selected as the extractant, the solvent ratio is 2:1, the liquid-to-solid ratio is 1:5, the water area is constant temperature shaken for 12-24 hours at a temperature of 40-45°C and a rotation speed of 220r / min, and centrifuged for 10 minutes at 800-1000rpm.

9. The mine microalgae carbon fixation, emission reduction and resource recycling system according to claim 1, characterized in that: The data monitored by various sensors in the closed pipeline photobioreactor (1-1) are transmitted to the OMEGA data acquisition instrument (6-2) through the communication cable I (6-1), and the collected data are uploaded to the network switch (6-4) through the communication cable II (6-2), and then transmitted to the data processing, analysis and optimization device (6-6) through the uplink data transmission line (6-5), and the processed data are transmitted to the microalgae cultivation intelligent monitoring and automatic control module (H) through the downlink data transmission line (6-7); the data processing, analysis and optimization device (6-6) includes a plurality of monitoring software models, each of which adopts a modular structure, and each module can independently execute different monitoring function modes to obtain the cultivation status of the entire microbial bioreactor.

10. The mine microalgae carbon fixation, emission reduction and resource recycling system according to claim 1, characterized in that: The intelligent controller (7-1) is respectively connected to the electromagnetic valve I (1-15), the electromagnetic valve II (5-6), the electromagnetic valve III (5-14) and the main circuit electromagnetic valve (7-2), and is supplied with power by the servo motor (7-3); the intelligent controller (7-1) is a modular structure, and operation instructions are pre-stored inside, and the liquid delivery and the opening and closing degree of the pipeline electromagnetic valve are controlled through digital input and output.

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