Algae-light complementary microalgae culture system and operation process thereof

Abstract

The invention provides an algae-light complementary microalgae culture system, which comprises a photovoltaic cell module, the photovoltaic cell module comprises an electric sunshade net, a storage battery and a plurality of groups of solar photovoltaic panels, and the electric sunshade net and the plurality of groups of solar photovoltaic panels are electrically connected with the storage battery; the sewage storage and transportation module is located under the electric sunshade net and electrically connected with the storage battery, and the sewage storage and transportation module is used for sewage storage, sterilization and temperature control; the microalgae culture module is located under the electric sunshade net and connected with the sewage storage and transportation module, and the microalgae culture module is used for culturing target microalgae; the remote control module is electrically connected with the electric sunshade net, the sewage storage and transportation module and the microalgae culture module. The problems that a photovoltaic power generation technology mentioned in the background technology is low in space utilization efficiency, and smoke CO2 and waste water generated by a biomass power plant are difficult to treat are solved.

Description

Technical Field

[0001] The present application belongs to the technical field of microalgae cultivation, and more specifically, to an algae-light complementary microalgae cultivation system and its operation process. Background Art

[0002] With the global climate change and the intensification of energy consumption, the search for clean and renewable energy has become a global focus. As a green energy, the widespread application of solar energy can not only alleviate the consumption of traditional fossil energy, but also has the potential to reduce greenhouse gas emissions. However, the existing solar energy utilization technology, especially photovoltaic power generation technology, still has problems such as low spatial utilization efficiency. How to optimize the spatial layout of photovoltaic cells and improve their comprehensive utilization efficiency has become an important challenge in technology research and development.

[0003] At the same time, water pollution, especially the discharge of high nitrogen and phosphorus wastewater, can easily cause eutrophication of water bodies and cause algal blooms, which has become an environmental problem that needs to be solved urgently. Although traditional wastewater treatment technologies can effectively reduce the concentration of pollutants, they are often accompanied by problems such as high energy consumption and complex equipment, and nutrients such as nitrogen and phosphorus in wastewater cannot be effectively utilized. At the same time, the flue gas emitted by power plants usually contains a high concentration of CO2, which is one of the main causes of global warming. As an efficient photosynthetic organism, microalgae can not only absorb nutrients such as nitrogen and phosphorus in water bodies, but also fix carbon dioxide in the flue gas of power plants through photosynthesis, achieving the dual purposes of environmental governance and resource utilization. At the same time, microalgae can also be used as fertilizers and feeds to generate economic benefits. Therefore, microalgae cultivation systems have gradually become a research hotspot in the field of wastewater treatment.

[0004] At present, the combination of microalgae cultivation system and photovoltaic technology has gradually attracted attention. By combining photovoltaic power generation with microalgae cultivation, not only can the photovoltaic space be fully utilized, but also solar energy can be effectively used to provide the required electricity for the microalgae cultivation system and optimize the growth environment of microalgae. However, the existing photovoltaic-microalgae systems are mostly single-structure designs, which fail to achieve efficient synergy between systems, have low space utilization, and fail to fully tap the potential of solar energy resources.

[0005] Therefore, the development of a microalgae cultivation system that can realize solar energy, photovoltaic technology, biomass power plant flue gas CO2 absorption and efficient utilization of sewage resources can not only improve the spatial utilization efficiency of photovoltaic power generation, but also achieve resource recycling by efficiently treating the flue gas CO2 and wastewater generated by biomass power plants. It has important practical application value and broad market prospects, and provides strong technical support for sustainable development. Summary of the invention

[0006] The purpose of the embodiments of the present application is to provide a microalgae cultivation system with algae-photovoltaic complementarity, so as to solve the problems of low space utilization efficiency of photovoltaic power generation technology mentioned in the background technology and difficulty in treating flue gas CO2 and wastewater generated by biomass power plants.

[0007] To achieve the above purpose, the technical solution adopted in this application is: a microalgae cultivation system with algae-light complementation, comprising: A photovoltaic cell module, wherein the photovoltaic cell module comprises an electric sunshade net, a storage battery and a plurality of solar photovoltaic panels, and the electric sunshade net and the plurality of solar photovoltaic panels are electrically connected to the storage battery; A sewage storage and transportation module is located directly below the electric sunshade net and is electrically connected to the battery. The sewage storage and transportation module is used for storing, sterilizing and controlling the temperature of sewage. A microalgae cultivation module is located directly below the electric sunshade net and is connected to the sewage storage and transportation module. The microalgae cultivation module is used to cultivate target microalgae; The remote control module is electrically connected to the electric sunshade net, the sewage storage and transportation module, and the microalgae cultivation module.

[0008] Preferably, the sewage storage and transportation module comprises: A sewage storage tank is connected to the leachate treatment equipment of the biomass power plant, and the sewage storage tank is used to store sewage from the leachate treatment equipment to provide nitrogen and phosphorus elements required for the growth of target microalgae; An ultraviolet sterilizer is connected to the sewage storage tank, and is used to sterilize the sewage coming out of the sewage storage tank; A temperature control unit is connected to the ultraviolet sterilizer, and the temperature control unit is electrically connected to the remote control module to ensure that the temperature of the sewage is suitable for the growth of target microalgae.

[0009] Preferably, the ultraviolet sterilizer comprises: case; An ultraviolet lamp tube passes through the shell, and two ends are connected to the shell; The quartz tube is wound around the ultraviolet lamp tube so that the sewage is exposed to more ultraviolet radiation when passing through the quartz tube, and the quartz tube has a water inlet and a water outlet.

[0010] Preferably, a reflective layer is provided on the inner wall of the shell to reflect the ultraviolet radiation onto the quartz tube, thereby further improving the utilization rate of the ultraviolet rays and the sterilization effect.

[0011] Preferably, the temperature control unit comprises: A cabinet body, wherein an inlet and an outlet are arranged on the cabinet body, and the inlet is connected to the water outlet; A variable frequency pump is installed in the cabinet and is electrically connected to the remote control module; An electric heating tank is installed in the cabinet and connected to the variable frequency pump; The variable frequency pump and the electric heating tank are both electrically connected to the battery; The variable frequency pump adjusts the operating frequency of the variable frequency pump according to the variable frequency command signal issued by the remote control module to achieve the purpose of sewage temperature control.

[0012] Preferably, the microalgae cultivation module comprises: A microalgae cultivation reactor is connected to the outlet of the cabinet, and an aerator is installed in the microalgae cultivation reactor; A carbon dioxide storage tank is connected to the aerator through a pipeline, and is used to store carbon dioxide and inject the carbon dioxide into the microalgae culture reactor through the aerator to provide a necessary carbon source for the target microalgae culture; The temperature and light sensor is arranged on the microalgae cultivation reactor, and is used to detect the temperature of the water in the microalgae cultivation reactor and the light intensity irradiated on the target microalgae, and send the temperature signal and the light intensity signal to the remote control module.

[0013] Preferably, the microalgae cultivation module also includes a carbon dioxide separation device, which is arranged between the carbon dioxide storage tank and the biomass power plant. The carbon dioxide separation device is used to filter and cool the flue gas CO2 generated by the biomass power plant and then transport it to the carbon dioxide storage tank for use in the target microalgae cultivation, while reducing the emission of flue gas CO2 from the biomass power plant.

[0014] Preferably, the carbon dioxide separation device comprises: The main body is provided with a water cooling sleeve and a filter cavity, and a coolant is passed into the water cooling sleeve to cool the smoke in the filter cavity; An activated carbon filler layer is arranged in the filter cavity near the carbon dioxide outlet; A primary filter fiber membrane is disposed in the filter cavity; A secondary filter fiber membrane connected to the activated carbon filler layer; An airflow channel is formed between the primary filter fiber membrane and the secondary filter fiber membrane, and is communicated with an outlet of the airflow channel arranged on the body; The flue gas is first filtered through the primary filter fiber membrane and then separated from the carbon dioxide through the secondary filter fiber membrane, and then enters the activated carbon filler layer through the isolation fiber membrane for adsorption and drying, and then discharged through the carbon dioxide outlet; the remaining flue gas mixed gas is discharged through the air flow channel outlet.

[0015] Preferably, a spiral guide plate is provided inside the water-cooling jacket to increase the heat exchange efficiency between the coolant and the flue gas.

[0016] Preferably, the operation process of an algae-photocomplementary microalgae cultivation system is as follows: Ⅰ. The sewage containing inorganic nutrients in the leachate treatment equipment of the biomass power plant first goes to the sewage storage tank under the action of the pump, and then passes through the ultraviolet sterilizer through the pipeline for disinfection treatment, and after the temperature is adjusted by the temperature control unit, it enters the microalgae culture reactor to continuously and stably provide the necessary nitrogen and phosphorus nutrients for the photosynthesis of microalgae cells; Ⅱ. The aerator in the microalgae cultivation module injects the carbon dioxide from the flue gas of the biomass power plant treated by the carbon dioxide separation device into the microalgae suspension in the form of bubbles, providing sufficient carbon source for the photosynthesis of the microalgae cells; III. The temperature and light sensor is used to monitor the light intensity parameters and water temperature parameters in the microalgae cultivation reactor, and feeds back the data to the remote control module through the control terminal; when the light intensity exceeds the set threshold, the remote control module will issue an automatic deployment command to the electric sunshade system installed above the microalgae cultivation reactor, and the sunshade system will automatically deploy with the support of the battery, moderately reducing the entry of direct sunlight to prevent excessive light from affecting the normal growth of microalgae; conversely, when the light intensity is lower than the threshold, the remote control module will issue an automatic retraction command to the electric sunshade system installed above the microalgae cultivation reactor, and the sunshade system will automatically retract with the support of the battery, increasing the system's reception of natural light, providing more sufficient light for the microalgae, so as to improve its photosynthesis efficiency; IV. When the water temperature in the microalgae culture reactor is higher than the preset temperature, the remote control module converts the electrical signal received from the temperature and light sensor into a command signal to the frequency conversion pump to increase the travel frequency, so that the sewage in the system flows faster and mixes quickly with the sewage in the electric heating tank to achieve the purpose of cooling; when the water temperature in the microalgae culture reactor is lower than the preset temperature, the remote control module converts the electrical signal received from the temperature and light sensor into a command signal to the frequency conversion pump to reduce the travel frequency, so as to maintain the optimal temperature range required for the growth of microalgae.

[0017] The beneficial effects of the algae-light complementary microalgae cultivation system provided in this application are: Compared with the prior art, the present invention has the following advantages: (1) Make full use of the photovoltaic space between photovoltaic panels for microalgae cultivation and sewage treatment, reducing the waste of land resources; (2) Through photovoltaic cell modules, the system can convert solar energy into electrical energy to supply the operation of various units in the system, such as water pumps, UV sterilizers, aerators and temperature control units, reducing the consumption of traditional energy and achieving energy self-sufficiency; (3) The electric sunshade net cooperates with the sensor to automatically adjust the sunshade status according to the actual light intensity, avoiding the damage of strong light to microalgae or the problem of insufficient weak light, providing the most suitable light conditions for microalgae and maximizing the photosynthesis efficiency; (4) The temperature control unit in the system can automatically heat or cool according to the water temperature changes fed back by the sensor, ensuring that the water temperature for microalgae cultivation is always within the optimal range, thereby improving the growth rate and biomass output of the microalgae; (5) Using wastewater rich in nutrients such as nitrogen and phosphorus as a culture medium for microalgae effectively treats wastewater problems and provides the necessary nutrient sources for microalgae, thus achieving environmentally friendly wastewater resource utilization; (6) Using the wastewater and CO2 in the flue gas generated by biomass power plants as nitrogen, phosphorus and carbon sources for microalgae cultivation can not only purify the high-nitrogen and phosphorus wastewater generated by biomass power plants, but also effectively fix the CO2 in the flue gas of biomass power plants. This is an effective measure to mitigate climate change. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A schematic diagram of the structure of a microalgae cultivation system with algae-light complementation provided in an embodiment of the present application; Figure 2 A schematic diagram of the three-dimensional structure of the ultraviolet sterilizer provided in an embodiment of the present application; Figure 3 A schematic diagram of the internal structure of the ultraviolet sterilizer provided in the embodiment of the present application; Figure 4 A schematic diagram of the structure of a temperature control unit provided in an embodiment of the present application; Figure 5 This is a schematic cross-sectional structural diagram of a carbon dioxide separation device provided in an embodiment of the present application.

[0020] Among them, the reference numerals in the figure are: 1. Solar photovoltaic panel; 2. Sewage storage tank; 3. Valve; 4. UV sterilizer; 401. Shell; 402. UV lamp; 403. Quartz tube; 404. Water inlet; 405. Water outlet; 5. Temperature control unit; 501. Cabinet; 502. Frequency conversion pump; 503. Electric heating tank; 504. Inlet; 505. Outlet; 6. Battery; 7. Electric sunshade net; 8. Carbon dioxide separation device; 801. Body; 802. Flue gas inlet; 803, carbon dioxide outlet; 804, water-cooling sleeve; 805, filter chamber; 806, coolant inlet; 807, coolant outlet; 808, activated carbon filler layer; 809, primary filter fiber membrane; 810, secondary filter fiber membrane; 811, isolation fiber membrane; 812, air flow channel outlet; 813, spiral guide plate; 9, microalgae culture reactor; 10, temperature and light sensor; 11, carbon dioxide storage tank; 12, column. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and 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 should not be understood as a limitation on the present application.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] Please also read Figures 1 to 5 Now, a microalgae cultivation system with algae-light complementation provided in an embodiment of the present application is described.

[0026] The algae-photovoltaic complementary microalgae cultivation system is built on an open area near a biomass power plant; the algae-photovoltaic complementary microalgae cultivation system consists of four modules: a photovoltaic cell module, a sewage storage and transportation module, and a microalgae cultivation module.

[0027] The specific photovoltaic cell module consists of an electric sunshade net 7, a battery 6 and multiple groups of solar photovoltaic panels 1, and the electric sunshade net 7 and the multiple groups of solar photovoltaic panels 1 are electrically connected to the battery 6. The electric sunshade net 7 is a prior art. Please refer to CN220173953U for the specific structure, which will not be elaborated here. Multiple groups of solar photovoltaic panels 1 are laid parallel and obliquely on the photovoltaic ground. Multiple groups of solar photovoltaic panels 1 are supported by columns 12, and the angle between the solar photovoltaic panel 1 and the ground is not more than 50°. The photovoltaic panel is connected to the battery 6 through wires, converts solar energy into electrical energy and stores it in the battery 6 for use by the system's electrical equipment. Multiple groups of solar photovoltaic panels 1 are distributed around the electric sunshade net 7.

[0028] The sewage storage and transportation module is located directly below the electric sunshade net 7 and is electrically connected to the battery 6. The sewage storage and transportation module is used to store, sterilize and control the temperature of sewage; the sewage storage and transportation module includes: a sewage storage and transportation tank 2, which is connected to the leachate treatment equipment of the biomass power plant. The sewage storage and transportation tank 2 is used to store sewage from the leachate treatment equipment to provide nitrogen, phosphorus and other nutrients required for the growth of target microalgae, and the outlet pipe of the sewage storage and transportation tank 2 is the secondary anaerobic membrane outlet; an ultraviolet sterilizer 4, which is connected to the ultraviolet sterilizer 4. Connected to the sewage storage tank 2, the ultraviolet sterilizer 4 is used to sterilize the sewage from the sewage storage tank 2. Specifically, the ultraviolet sterilizer 4 includes: a housing 401; an ultraviolet lamp 402, the ultraviolet lamp 402 passes through the housing 401, and the two ends are connected to the housing 401; a quartz tube 403, the quartz tube 403 is wound on the ultraviolet lamp 402, so that the sewage is exposed to more ultraviolet radiation in the process of passing through the quartz tube 403, and the quartz tube 403 has a water inlet 404 and a water outlet 405. To further improve the utilization rate of ultraviolet rays and the sterilization effect, a reflective layer is provided on the inner wall of the housing 401 to reflect the ultraviolet radiation onto the quartz tube 403. A temperature control unit 5 is connected to the ultraviolet sterilizer 4, and the temperature control unit 5 is electrically connected to the remote control module to ensure that the temperature of the sewage is suitable for the growth of the target microalgae. The temperature control unit 5 includes: a cabinet 501, on which an inlet 504 and an outlet 505 are provided, and the inlet 504 is connected to the water outlet 405; a variable frequency pump 502, which is installed in the cabinet 501 and is electrically connected to the remote control module; an electric heating tank 503, which is installed in the cabinet 501 and is connected to the variable frequency pump 502; the variable frequency pump 502 and the electric heating tank 503 are both electrically connected to the battery 6; the remote control module sends a variable frequency command signal to the variable frequency pump 502 according to the temperature signal transmitted by the temperature and light sensor 10, to The operating frequency of the variable frequency pump 502 is adjusted to achieve the purpose of sewage temperature control. For example, when the water temperature in the microalgae cultivation reactor 9 is higher than the preset temperature, the remote control module sends a command to the variable frequency pump 502 to increase the long-distance frequency, so that the sewage in the system accelerates the flow speed and quickly mixes with the sewage in the electric heating tank 503 to achieve the purpose of cooling; if the optimal temperature for microalgae growth is about 20°C, when the water temperature in the microalgae cultivation reactor 9 is lower than the preset temperature, the remote control module sends a command to reduce the long-distance frequency to the variable frequency pump 502, so that the sewage in the system slows down the flow speed and mixes with the sewage in the electric heating tank 503 to achieve the purpose of heating.

[0029] The microalgae cultivation module is located directly below the electric sunshade net 7 and is connected to the sewage storage and transportation module. The microalgae cultivation module is used to cultivate target microalgae. Specifically, the microalgae cultivation module includes: A microalgae culture reactor 9, which is connected to the outlet 505 of the cabinet 501, and an aerator is installed in the microalgae culture reactor 9; a carbon dioxide storage tank 11, which is connected to the aerator through a pipeline, and is used to store carbon dioxide, and inject carbon dioxide into the microalgae suspension in the microalgae culture reactor 9 in the form of bubbles through the aerator, so as to provide sufficient carbon source for the photosynthesis of microalgae cells; a temperature and light sensor 10, which is arranged on the microalgae culture reactor 9, and is used to detect the temperature of the water in the microalgae culture reactor 9 and the light intensity irradiated on the target microalgae, and send the temperature signal and the light intensity signal to the remote control module. According to the light intensity signal transmitted by the temperature and light sensor 10, the remote control module sends a command to the electric sunshade net 7 to unfold the sunshade net or retract the sunshade net. For example, the optimal light intensity range for the growth of Chlorella is 5500~7000 lux. When the light intensity exceeds the set threshold, the remote control module will issue an automatic deployment command to the electric shading system installed above the microalgae cultivation reactor 9, and the shading system will automatically deploy with the support of the battery 6, moderately reducing the entry of direct sunlight and preventing excessive light from affecting the normal growth of microalgae; conversely, when the light intensity is lower than the threshold, the remote control module will issue an automatic folding command to the electric shading system installed above the microalgae cultivation reactor 9, and the shading system will automatically fold with the support of the battery 6, increasing the system's reception of natural light, providing more sufficient light for the microalgae, and improving its photosynthesis efficiency.

[0030] As a preferred embodiment, the microalgae cultivation module also includes a carbon dioxide separation device 8, which is arranged between the carbon dioxide storage tank 11 and the biomass power plant. The carbon dioxide separation device 8 is used to filter and cool the flue gas CO2 generated by the biomass power plant and then transport it to the carbon dioxide storage tank 11 for use in the target microalgae cultivation, while reducing the emission of flue gas CO2 from the biomass power plant. Specifically, the carbon dioxide separation device 8 comprises: a body 801, a flue gas inlet 802 and a carbon dioxide outlet 803 are respectively arranged at both ends of the body 801, the flue gas inlet 802 is connected to the flue gas purification process outlet 505 of the biomass power plant, and the carbon dioxide outlet 803 is connected to the carbon dioxide storage tank 11, a water cooling sleeve 804 and a filter cavity 805 are also arranged on the body 801, a coolant inlet 806 and a coolant outlet 807 are arranged on the body 801, and a coolant is introduced into the water cooling sleeve 804 to cool the flue gas entering the filter cavity 805; an activated carbon filler layer 808 is arranged in the filter cavity 805 near the carbon dioxide outlet 803, and in the activated carbon filler An isolation fiber membrane 811 is arranged on one side of layer 808 close to the filter cavity 805; a primary filter fiber membrane 809 is arranged in the filter cavity 805; a secondary filter fiber membrane 810 is connected to the activated carbon filler layer 808; an air flow channel is formed between the primary filter fiber membrane 809 and the secondary filter fiber membrane 810, and is connected to an air flow channel outlet 812 arranged on the main body 801; the primary filter fiber membrane 809, the secondary filter fiber membrane 810, and the isolation fiber membrane 811 in this article all adopt modified polyimide hollow fiber membranes, and the pore size of the secondary fiber membrane is smaller than that of the isolation fiber membrane 811, and the pore size of the isolation fiber membrane 811 is smaller than that of the primary fiber membrane. After the flue gas of the biomass power plant enters from the flue gas inlet 802, it is first filtered by the primary filter fiber membrane 809 and then separated from the carbon dioxide by the secondary filter fiber membrane 810. The carbon dioxide passes through the isolation fiber membrane 811 and enters the activated carbon filler layer for adsorption and drying, and then is discharged through the carbon dioxide outlet 803; the remaining flue gas mixture is discharged through the air flow channel outlet 812. In order to further improve the heat exchange efficiency of the water cooling jacket 804, a spiral guide plate 813 is arranged in the water cooling jacket 804.

[0031] The remote control module is a prior art, consisting of a circuit board, a microprocessor, etc., and the sewage storage tank 2 is electrically connected to the drive motor of the electric sunshade net 7, the variable frequency pump 502 of the sewage storage module, and the temperature and light sensor 10 of the microalgae cultivation module.

[0032] In this system, the pipeline between the sewage storage tank 2 and the ultraviolet sterilizer 4, the pipeline between the ultraviolet sterilizer 4 and the temperature control unit 5, and the pipeline between the temperature control unit 5 and the microalgae cultivation reactor 9 are all installed with valves 3 so that the pipeline passage can be closed in time when a certain equipment in the system needs maintenance.

[0033] The operation process of the algae light complementary microalgae cultivation system is as follows: Ⅰ. The sewage containing inorganic nutrients in the leachate treatment equipment of the biomass power plant first goes to the sewage storage tank 2 under the action of the pump, and then passes through the ultraviolet sterilizer 4 through the pipeline for disinfection treatment, and after the temperature is adjusted by the temperature control unit 5, it enters the microalgae culture reactor 9 to continuously and stably provide the necessary nitrogen and phosphorus nutrients for the photosynthesis of the microalgae cells; Ⅱ. The aerator in the microalgae cultivation module injects the carbon dioxide from the flue gas of the biomass power plant treated by the carbon dioxide separation device 8 into the microalgae suspension in the form of bubbles, providing sufficient carbon source for the photosynthesis of the microalgae cells; III. The temperature and light sensor 10 is used to monitor the light intensity parameters and water temperature parameters in the microalgae cultivation reactor 9, and feeds back the data to the remote control module through the control terminal; when the light intensity exceeds the set threshold, the remote control module will issue an automatic deployment command to the electric sunshade system installed above the microalgae cultivation reactor 9 and will automatically deploy with the support of the battery 6, appropriately reducing the entry of direct sunlight to prevent excessive light from affecting the normal growth of microalgae; conversely, when the light intensity is lower than the threshold, the remote control module will issue an automatic retraction command to the electric sunshade system installed above the microalgae cultivation reactor 9 and will automatically retract the sunshade system with the support of the battery 6, increasing the system's reception of natural light and providing more sufficient light for the microalgae to improve its photosynthesis efficiency; IV. When the water temperature in the microalgae culture reactor 9 is higher than the preset temperature, the remote control module converts the electrical signal received from the temperature and light sensor 10 into a command signal to the variable frequency pump 502 to increase the travel frequency, so that the sewage in the system flows faster and is quickly mixed with the sewage in the electric heating tank 503 to achieve the purpose of cooling; when the water temperature in the microalgae culture reactor 9 is lower than the preset temperature, the remote control module converts the electrical signal received from the temperature and light sensor 10 into a command signal to the variable frequency pump 502 to reduce the travel frequency, so as to maintain the optimal temperature range required for the growth of microalgae.

[0034] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A microalgae cultivation system with algae-light complementation, characterized in that: include: A photovoltaic cell module, wherein the photovoltaic cell module comprises an electric sunshade net, a storage battery and a plurality of solar photovoltaic panels, and the electric sunshade net and the plurality of solar photovoltaic panels are electrically connected to the storage battery; A sewage storage and transportation module is located directly below the electric sunshade net and is electrically connected to the battery. The sewage storage and transportation module is used for storing, sterilizing and controlling the temperature of sewage. A microalgae cultivation module is located directly below the electric sunshade net and is connected to the sewage storage and transportation module. The microalgae cultivation module is used to cultivate target microalgae; The remote control module is electrically connected to the electric sunshade net, the sewage storage and transportation module, and the microalgae cultivation module.

2. The algae-photocomplementary microalgae cultivation system according to claim 1, characterized in that: The sewage storage and transportation module comprises: A sewage storage tank is connected to the leachate treatment equipment of the biomass power plant, and the sewage storage tank is used to store sewage from the leachate treatment equipment to provide nitrogen and phosphorus elements required for the growth of target microalgae; An ultraviolet sterilizer is connected to the sewage storage tank, and is used to sterilize the sewage coming out of the sewage storage tank; A temperature control unit is connected to the ultraviolet sterilizer, and the temperature control unit is electrically connected to the remote control module to ensure that the temperature of the sewage is suitable for the growth of target microalgae.

3. The algae-photocomplementary microalgae cultivation system according to claim 2, characterized in that: The ultraviolet sterilizer comprises: case; An ultraviolet lamp tube passes through the shell, and two ends are connected to the shell; The quartz tube is wound around the ultraviolet lamp tube so that the sewage is exposed to more ultraviolet radiation when passing through the quartz tube, and the quartz tube has a water inlet and a water outlet.

4. The algae-photocomplementary microalgae cultivation system according to claim 3, characterized in that: A reflective layer is arranged on the inner wall of the shell to reflect the ultraviolet radiation onto the quartz tube, thereby further improving the utilization rate of the ultraviolet rays and the sterilization effect.

5. The algae-photocombination microalgae cultivation system according to claim 4, characterized in that: The temperature control unit comprises: A cabinet body, wherein an inlet and an outlet are arranged on the cabinet body, and the inlet is connected to the water outlet; A variable frequency pump is installed in the cabinet and is electrically connected to the remote control module; An electric heating tank is installed in the cabinet and connected to the variable frequency pump; The variable frequency pump and the electric heating tank are both electrically connected to the battery; The variable frequency pump adjusts the operating frequency of the variable frequency pump according to the variable frequency command signal issued by the remote control module to achieve the purpose of sewage temperature control.

6. The algae-photocomplementary microalgae cultivation system according to claim 1 or 5, characterized in that: The microalgae cultivation module comprises: A microalgae cultivation reactor is connected to the outlet of the cabinet, and an aerator is installed in the microalgae cultivation reactor; A carbon dioxide storage tank is connected to the aerator through a pipeline, and is used to store carbon dioxide and inject the carbon dioxide into the microalgae culture reactor through the aerator to provide a necessary carbon source for the target microalgae culture; The temperature and light sensor is arranged on the microalgae cultivation reactor, and is used to detect the temperature of the water in the microalgae cultivation reactor and the light intensity irradiated on the target microalgae, and send the temperature signal and the light intensity signal to the remote control module.

7. The algae-photocomplementary microalgae cultivation system according to claim 6, characterized in that: The microalgae cultivation module also includes a carbon dioxide separation device, which is arranged between the carbon dioxide storage tank and the biomass power plant. The carbon dioxide separation device is used to filter and cool the flue gas CO2 generated by the biomass power plant and then transport it to the carbon dioxide storage tank for target microalgae cultivation, while reducing the emission of flue gas CO2 from the biomass power plant.

8. The algae-photocomplementary microalgae cultivation system according to claim 7, characterized in that: The carbon dioxide separation device comprises: The main body is provided with a water cooling sleeve and a filter cavity, and a coolant is passed into the water cooling sleeve to cool the smoke in the filter cavity; An activated carbon filler layer is arranged in the filter cavity near the carbon dioxide outlet; A primary filter fiber membrane is disposed in the filter cavity; A secondary filter fiber membrane connected to the activated carbon filler layer; An air flow channel is formed between the primary filter fiber membrane and the secondary filter fiber membrane, and is communicated with an outlet of the air flow channel arranged on the body; The flue gas is first filtered through the primary filter fiber membrane and then separated from the carbon dioxide through the secondary filter fiber membrane, and then enters the activated carbon filler layer through the isolation fiber membrane for adsorption and drying, and then discharged through the carbon dioxide outlet; the remaining flue gas mixed gas is discharged through the air flow channel outlet.

9. The algae-photocombination microalgae cultivation system according to claim 8, characterized in that: A spiral guide plate is arranged inside the water cooling jacket to increase the heat exchange efficiency between the coolant and the flue gas.

10. An operation process of an algae-light complementary microalgae cultivation system, characterized in that: Ⅰ. The sewage containing inorganic nutrients in the leachate treatment equipment of the biomass power plant first goes to the sewage storage tank under the action of the pump, and then passes through the ultraviolet sterilizer through the pipeline for disinfection treatment, and after the temperature is adjusted by the temperature control unit, it enters the microalgae culture reactor to continuously and stably provide the necessary nitrogen and phosphorus nutrients for the photosynthesis of microalgae cells; Ⅱ. The aerator in the microalgae cultivation module injects the carbon dioxide from the flue gas of the biomass power plant treated by the carbon dioxide separation device into the microalgae suspension in the form of bubbles, providing sufficient carbon source for the photosynthesis of the microalgae cells; III. The temperature and light sensor is used to monitor the light intensity parameters and water temperature parameters in the microalgae cultivation reactor, and feeds back the data to the remote control module through the control terminal; when the light intensity exceeds the set threshold, the remote control module will issue an automatic deployment command to the electric sunshade system installed above the microalgae cultivation reactor, and the sunshade system will automatically deploy with the support of the battery, moderately reducing the entry of direct sunlight to prevent excessive light from affecting the normal growth of microalgae; conversely, when the light intensity is lower than the threshold, the remote control module will issue an automatic retraction command to the electric sunshade system installed above the microalgae cultivation reactor, and the sunshade system will automatically retract with the support of the battery, increasing the system's reception of natural light, providing more sufficient light for the microalgae, so as to improve its photosynthesis efficiency; IV. When the water temperature in the microalgae culture reactor is higher than the preset temperature, the remote control module converts the electrical signal received from the temperature and light sensor into a command signal to the frequency conversion pump to increase the travel frequency, so that the sewage in the system flows faster and mixes quickly with the sewage in the electric heating tank to achieve the purpose of cooling; when the water temperature in the microalgae culture reactor is lower than the preset temperature, the remote control module converts the electrical signal received from the temperature and light sensor into a command signal to the frequency conversion pump to reduce the travel frequency, so as to maintain the optimal temperature range required for the growth of microalgae.

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