Microalgae culture system utilizing photovoltaic green electricity

Abstract

The utility model discloses a microalgae culture system utilizing photovoltaic green electricity, which comprises a photovoltaic device and a culture device, the photovoltaic device comprises a photovoltaic panel, the photovoltaic panel is obliquely arranged relative to the ground, the culture device comprises a culture reaction mechanism and an illumination mechanism, the culture reaction mechanism is provided with a culture space for accommodating microalgae culture solution, and the illumination mechanism is arranged on the culture space. The cultivation reaction mechanism is arranged on the lower side of the photovoltaic panel, the cultivation reaction mechanism is arranged in a shadow area of the photovoltaic panel, the illumination mechanism is at least used for providing illumination for the cultivation space, and the photovoltaic panel is connected with the illumination mechanism so as to provide energy for the illumination mechanism. The cultivation reaction mechanism and the illumination mechanism are arranged on the lower side of the photovoltaic panel, the cultivation space can be completely covered by the photovoltaic panel, and illumination is provided for the cultivation space through the illumination mechanism, so that the illumination mechanism can greatly prolong the growth time of microalgae; on the premise that the structure and arrangement rule of an existing photovoltaic panel are not changed and the generating capacity is not reduced, microalgae culture through green electricity is achieved.

Description

Technical Field

[0001] The utility model relates to a microalgae cultivation system utilizing photovoltaic green electricity, belonging to the technical field of microalgae cultivation. Background Art

[0002] Microalgae convert solar energy into chemical energy through photosynthesis and store it in cells to form biomass, which can be used as food, nutritional supplements, aquatic bait, etc., and can be further processed into biofuel. However, the current light energy conversion rate of microalgae photosynthesis is about 1%, which is far lower than the theoretical conversion rate of 12%. In order to improve the light energy utilization rate of microalgae, the cultivation depth of microalgae is usually reduced. Currently, commercialized microalgae cultivation facilities include horizontal pipe reactors and open runway pools. Among them, closed pipe reactors have become the main form of high-value-added microalgae cultivation due to their advantages such as less water evaporation, short light path, less biological pollution, and high CO2 absorption rate.

[0003] Photovoltaics, as one of the main forms of new energy, is an industry that countries around the world are vigorously developing. At present, the maximum efficiency of large-scale monocrystalline silicon photovoltaic cells is 26.6%, which is much higher than other forms of light energy utilization. Photovoltaic settings can be determined according to the terrain and do not occupy arable land. Usually, photovoltaic panels are arranged in an east-west tilted manner and at a certain distance from the ground. According to the law of sunlight at the installation site, the gap between each row of photovoltaic panels is set so that the front and rear rows of photovoltaic panels do not block each other, and space is also reserved for cleaning and maintenance.

[0004] The time for microalgae to grow under natural light is less than 12 hours / day. Assuming that green electricity generated by photovoltaics is used for cell reproduction, it can be combined with energy storage to achieve all-weather cultivation. Among them, in the prior art, the patent with publication number CN115044475A discloses a method for cultivating microalgae in combination with photovoltaic panels, in which a photobioreactor for microalgae cultivation is set in the gap between each row of photovoltaic panels, and by raising the distance between the photovoltaic panels and the ground, the photovoltaic panels can achieve a 20-80% shading ratio for the microalgae cultivation pool. This design increases the height of the supporting material of the photovoltaic panel, thereby weakening the wind resistance of the photovoltaic panel. At the same time, in order to reduce shading, the spacing between each row of photovoltaic panels is increased, the number of photovoltaic panels arranged under the same floor area is reduced, and the green electricity production is reduced. In addition, the patent with publication number CN219507903U discloses a system for setting photovoltaic panels in a microalgae greenhouse to drive the circulation of algae liquid. This design increases the height of the greenhouse to increase power generation, changes the structure of the original photobioreactor, and is difficult to actually build. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a microalgae cultivation system utilizing photovoltaic green electricity.

[0006] In order to achieve the above-mentioned utility model purpose, the technical solution adopted by the utility model includes:

[0007] The utility model provides a microalgae cultivation system utilizing photovoltaic green electricity, which comprises a photovoltaic device and a cultivation device, wherein the photovoltaic device comprises a photovoltaic panel, and the photovoltaic panel is arranged obliquely relative to the ground; the cultivation device comprises a cultivation reaction mechanism and an illumination mechanism, the cultivation reaction mechanism is provided with a cultivation space for accommodating microalgae culture solution, the cultivation reaction mechanism is arranged at the lower side of the photovoltaic panel, and the cultivation reaction mechanism is arranged in a shadow area of ​​the photovoltaic panel, the illumination mechanism is at least used for providing illumination to the cultivation space, and the photovoltaic panel is connected to the illumination mechanism to provide energy to the illumination mechanism.

[0008] In this embodiment,

[0009] Furthermore, the cultivation reaction mechanism includes a cultivation pipe assembly and a bracket assembly, the cultivation pipe is provided with a cultivation space, the bracket assembly is provided with a support space, the cultivation pipe assembly is arranged in the support space, the bracket assembly is inclined away from a side of the photovoltaic panel, and the inclination direction of the bracket assembly is opposite to the inclination direction of the photovoltaic panel.

[0010] Furthermore, the inclination angle of the bracket assembly is greater than the inclination angle of the photovoltaic panel.

[0011] Furthermore, the distance between the highest end of the bracket assembly and the horizontal ground is smaller than the distance between the highest end of the photovoltaic panel and the horizontal ground.

[0012] Furthermore, the length of the bracket assembly is consistent with the length of the photovoltaic panel.

[0013] Furthermore, a side of the bracket assembly away from the photovoltaic panel is a stepped structure.

[0014] Furthermore, the support assembly includes a plurality of support frames, and the plurality of support frames are combined and stacked to form the support assembly with a stepped structure.

[0015] Furthermore, the support frame includes a plurality of cross beams and a plurality of vertical beams, and the plurality of cross beams and the plurality of vertical beams are interconnected to form the support space.

[0016] Furthermore, the cultivation pipeline assembly includes a plurality of cultivation pipelines, and the plurality of cultivation pipelines are arranged in series.

[0017] Furthermore, the cultivation channel is a high borosilicate glass structure or an organic plastic structure or an organic glass structure.

[0018] Furthermore, the outer diameter of the cultivation pipe is 6-12 cm.

[0019] Furthermore, the cultivation device also includes a circulating carbon replenishment mechanism, which includes a circulating carbon replenishment barrel and a power pump. The circulating carbon replenishment barrel is connected to the cultivation pipeline assembly, and the power pump is connected to the circulating carbon replenishment barrel to drive the microalgae culture solution to circulate between the cultivation space and the circulating carbon replenishment barrel.

[0020] Furthermore, the photovoltaic panel is connected to the power pump to supply energy to the power pump.

[0021] Furthermore, one end of the circulating carbon replenishing barrel is connected to an aeration mechanism.

[0022] Furthermore, the illumination mechanism comprises a plurality of LED light sources, the plurality of LED light sources are evenly spaced and arranged on the bracket assembly, and the illumination directions of the plurality of LED light sources are arranged relative to the microalgae culture solution.

[0023] Furthermore, the distance between the LED light source and the liquid surface of the microalgae culture solution is less than 10 cm.

[0024] Furthermore, the light source coverage length of the LED light source is 20%-80% of the total length of the cultivation pipeline assembly.

[0025] Furthermore, the light intensity of the LED light source is 50-300 μmol / m 2 / s.

[0026] Furthermore, the photovoltaic device also includes a photovoltaic support frame, and the photovoltaic support frame is provided with a first end and a second end opposite to each other, the first end is fixedly connected to the horizontal ground, and the second end is connected to the central area of ​​the photovoltaic panel.

[0027] Furthermore, the distance between the lowest end of the photovoltaic panel and the horizontal ground is 30-50 cm.

[0028] Furthermore, the system includes a plurality of cultivation units arranged at intervals, each of the cultivation units includes a photovoltaic device and a cultivation device, and there is a maintenance gap between the photovoltaic panels of two adjacent cultivation units, and the maintenance gap is at least 1 m.

[0029] Compared with the prior art, the advantages of the utility model include:

[0030] The utility model arranges the cultivation reaction mechanism and the illumination mechanism on the lower side of the photovoltaic panel, so that the cultivation space can be completely covered by the photovoltaic panel, and is in the shadow of the photovoltaic panel except for a small amount of natural light in the early morning and evening. In addition, the illumination mechanism is powered by the photovoltaic panel, and the illumination mechanism replaces natural light to provide illumination to the cultivation space, so that the illumination mechanism can greatly prolong the growth time of the microalgae, and the cultivation of microalgae using green electricity is realized without changing the structure and layout rules of the existing photovoltaic panel and without reducing the power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, 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 recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 This is a schematic diagram of the structure of the microalgae cultivation system in one embodiment of the utility model;

[0033] Figure 2 It is a front view of a photovoltaic panel and a bracket assembly in one embodiment of the utility model;

[0034] Figure 3 This is a structural schematic diagram of a bracket assembly in one embodiment of the utility model;

[0035] Figure 4 This is a schematic diagram of the structure between multiple rows of photovoltaic panels in one embodiment of the utility model;

[0036] Figure 5 This is a flow diagram of carbon replenishment of microalgae culture solution in one embodiment of the utility model.

[0037] Description of reference numerals:

[0038] 100. Photovoltaic panel; 200. Cultivation pipeline assembly; 300. Bracket assembly; 310. Support frame; 311. Crossbeam; 312. Vertical beam; 400. Illumination mechanism; 510. Circulating carbon replenishment barrel; 520. Power pump; 600. Photovoltaic support frame. DETAILED DESCRIPTION

[0039] In view of the deficiencies in the prior art, the inventor of this case has proposed the technical solution of the utility model after long-term research and extensive practice. The technical solution, its implementation process and principle will be further explained as follows.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0041] In addition, in the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", "horizontal", "vertical", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 present invention.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "an embodiment", "the embodiment", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0043] The technical solution, its implementation process and principle will be further explained below in conjunction with the accompanying drawings.

[0044] See also Figure 1-Figure 5 A microalgae cultivation system using photovoltaic green electricity includes a photovoltaic device and a cultivation device. The photovoltaic device includes a photovoltaic panel 100, which is arranged obliquely relative to the ground. The cultivation device includes a cultivation reaction mechanism and an illumination mechanism 400. The cultivation reaction mechanism is provided with a cultivation space for accommodating microalgae culture solution. The cultivation reaction mechanism is arranged on the lower side of the photovoltaic panel 100, and the cultivation reaction mechanism is arranged in the shadow area of ​​the photovoltaic panel 100. The illumination mechanism 400 is at least used to provide light to the cultivation space. The photovoltaic panel 100 is connected to the illumination mechanism 400 to provide energy to the illumination mechanism 400.

[0045] In this embodiment, if Figure 1 , 2As shown, the photovoltaic panel 100 is a rectangular plate structure, and the photovoltaic panel 100 can absorb sunlight to generate electricity. When installed, the photovoltaic panel 100 can be oriented east-west and tilted at a certain angle relative to the horizontal ground. The tilt angle between the photovoltaic panel 100 and the horizontal ground can be recorded as α. In this embodiment, α is between 10-45°. In addition, the cultivation device includes a cultivation reaction mechanism and an illumination mechanism 400, wherein the illumination mechanism 400 is connected to the photovoltaic panel 100 so that the electricity generated by the photovoltaic panel 100 can be supplied to the illumination mechanism 400. A cultivation space is provided in the cultivation reaction mechanism, and the cultivation space can contain microalgae culture solution for cultivating microalgae, and the illumination mechanism 400 can provide light to the cultivation space. When in use, the cultivation reaction mechanism and the illumination mechanism 400 are installed on the lower side of the photovoltaic panel 100, and when the photovoltaic panel 100 is tilted toward the direction of sunlight to absorb sunlight, the sunlight directly irradiates the photovoltaic panel 100 and generates a shadow area of ​​the photovoltaic panel 100 on the lower side of the photovoltaic panel 100. The cultivation reaction mechanism and the illumination mechanism 400 are arranged in the shadow area so that the cultivation reaction mechanism is shielded by the photovoltaic panel 100 as much as possible to reduce the influence of natural light on it, and the illumination mechanism 400 is used to provide light for the microalgae in the cultivation space, thereby extending the growth time of the microalgae, and the energy supply of the illumination mechanism 400 is realized by the green electricity of the light panel, thereby improving energy utilization and further reducing carbon emissions.

[0046] In the above structure, by setting the cultivation reaction mechanism and the illumination mechanism 400 on the lower side of the photovoltaic panel 100, the cultivation space can be completely covered by the photovoltaic panel 100. Except for a small amount of natural light that may be received in the early morning and evening, the rest of the time is in the shadow range of the photovoltaic panel 100. In addition, the photovoltaic panel 100 supplies power to the illumination mechanism 400, and the illumination mechanism 400 replaces natural light to provide illumination to the cultivation space, effectively avoiding the uneven lack of natural light at night or in rain, fog, wind and sand weather, thereby affecting the cultivation of microalgae, so that the illumination mechanism 400 can greatly extend the growth time of microalgae, and realize the cultivation of microalgae using green electricity without changing the structure and layout rules of the existing photovoltaic panel 100 and without reducing the power generation. In addition, the cultivation reaction mechanism is set on the lower side of the photovoltaic panel 100, so that the photovoltaic panel 100 can realize the barrier protection effect of the cultivation space, effectively avoiding the influence of wind, sand, rain, fog and other weather on the environment for cultivating microalgae.

[0047] In the specific structure of the cultivation reaction mechanism, the cultivation reaction mechanism includes a cultivation pipe assembly 200 and a bracket assembly 300, a cultivation space is provided in the cultivation pipe, the bracket assembly 300 is provided with a support space, the cultivation pipe assembly 200 is arranged in the support space, the bracket assembly 300 is inclined away from a side of the photovoltaic panel 100, and the inclination direction of the bracket assembly 300 is opposite to the inclination direction of the photovoltaic panel 100. The inclination angle of the bracket assembly 300 is greater than the inclination angle of the photovoltaic panel 100. The distance between the highest end of the bracket assembly 300 and the horizontal ground is less than the distance between the highest end of the photovoltaic panel 100 and the horizontal ground. The length of the bracket assembly 300 is consistent with the length of the photovoltaic panel 100.

[0048] In this embodiment, the cultivation reaction mechanism includes a cultivation pipe assembly 200 and a bracket assembly 300. The interior of the cultivation pipe assembly 200 is a hollow structure to form a cultivation space. During installation, the bracket assembly 300 is installed on the lower side of the photovoltaic panel 100. Specifically, the bracket assembly 300 can be fixed on the horizontal ground by cement piles, and then the cultivation pipe assembly 200 is placed on the bracket assembly 300, wherein the side of the bracket assembly 300 away from the photovoltaic panel 100 is an inclined structure, and the inclination direction is opposite to the inclination direction of the photovoltaic panel 100. The inclination angle of the bracket assembly 300 can be recorded as β, so as to ensure that the cultivation pipe assembly 200 is completely blocked by the photovoltaic panel 100. The placement area of ​​the cultivation pipe assembly 200 is increased to increase the volume of the cultivation space. In addition, in another embodiment, the photovoltaic panel 100 can be set as a multi-row mechanism. Therefore, in order to prevent the installed cultivation pipe assembly 200 and the bracket assembly 300 from producing a shading effect on the photovoltaic panel 100 in the rear row, the inclination angle β on one side of the bracket assembly 300 is greater than the inclination angle α of the photovoltaic panel 100. At the same time, the distance between the highest end of the bracket assembly 300 and the horizontal ground in the vertical direction can be recorded as h, and the distance between the highest end of the photovoltaic panel 100 and the horizontal ground in the vertical direction can be recorded as b. In order to prevent the bracket assembly 300 from affecting the placement of the photovoltaic panel 100, h should be less than b. In this embodiment, the width of the photovoltaic panel 100 is 3-10m, the length of the photovoltaic panel 100 can be 30m, and the length of the bracket assembly 300 is consistent with the length of the photovoltaic panel 100, so that the cultivation pipe assembly 200 can be completely blocked by the photovoltaic panel 100.

[0049] Specifically, the side of the support assembly 300 away from the photovoltaic panel 100 is a stepped structure. In this embodiment, the inclined structure of one side of the support assembly 300 can be achieved by setting a stepped structure, wherein the width of the support assembly 300 gradually decreases from bottom to top along the vertical direction, so that the outermost connection surface of each layer of the support assembly 300 is an inclined surface structure, that is, the inclination angle of the inclined surface is β.

[0050] More specifically, the support assembly 300 includes a plurality of support frames 310, which are stacked to form a stepped support assembly 300. The support frame 310 includes a plurality of cross beams 311 and a plurality of vertical beams 312, which are interconnected to form a support space.

[0051] In this embodiment, if Figure 3 As shown, the support frame 310 is a rectangular parallelepiped frame, and a plurality of support frames 310 can be assembled and installed to form a staircase-shaped support assembly 300, wherein the support frame 310 may include a plurality of cross beams 311 and a plurality of vertical beams 312, wherein the support frame 310 includes four vertical beams 312, four long cross beams 311 and four short cross beams 311, the four vertical beams 312 are arranged along the height direction of the support frame 310, the four long cross beams 311 are arranged along the length direction of the support frame 310, and the four short cross beams 311 are arranged along the length direction of the support frame 310. The four vertical beams 312, four long horizontal beams 311 and four short horizontal beams 311 are arranged in the width direction, and are connected to form a support frame 310. When assembled, they are placed layer by layer in the vertical direction, and the number of support frames 310 gradually decreases from bottom to top to form a stepped structure. In this embodiment, in the width direction of the support frame 310, from bottom to top, the number of support frames 310 in each layer is four, three, two and one respectively, and a total of four layers are arranged, and support columns and cement piles are arranged on the lower side of the support frame 310 at the bottom layer to be fixed on the horizontal ground. When placing the cultivation pipe assembly 200, the cultivation pipe assembly 200 can be placed at the bottom of the support frame 310, so that the short horizontal beams 311 of the support frame 310 support the cultivation pipe assembly 200, the length direction of the cultivation pipe assembly 200 is consistent with the length direction of the photovoltaic panel 100, and the cultivation pipe assembly 200 is also arranged on the support frame 310 in the vertical direction. A plurality of support frames 310 are arranged in combination to form a stepped structure, thereby facilitating installation and disassembly of the bracket assembly 300 . Meanwhile, the shape of the bracket assembly 300 can be changed as needed to improve the applicability of the bracket assembly 300 .

[0052] In the specific structure of the cultivation pipeline component 200, the cultivation pipeline component 200 includes a plurality of cultivation pipelines, and the plurality of cultivation pipelines are arranged in series. The cultivation pipeline is a high borosilicate glass structure or an organic plastic structure or an organic glass structure. The outer diameter of the cultivation pipeline is 6-12 cm.

[0053] In this embodiment, the cultivation pipe assembly 200 includes a plurality of cultivation pipes, and the plurality of cultivation pipes are respectively placed on the support frame 310, and the plurality of cultivation pipes are connected in series, so that the plurality of cultivation pipes are interconnected, which is convenient for installation and disassembly, and can effectively adapt to the shape structure of the support assembly 300, wherein the cultivation pipe can be made of high borosilicate glass or organic plastic materials such as PVC, PET, or plexiglass. In addition, the outer diameter of the cultivation pipe is 6-12 cm.

[0054] In addition, the cultivation device also includes a circulating carbon replenishment mechanism, which includes a circulating carbon replenishment barrel 510 and a power pump 520. The circulating carbon replenishment barrel 510 is connected to the cultivation pipeline assembly 200, and the power pump 520 is connected to the circulating carbon replenishment barrel 510 to drive the microalgae culture solution to circulate between the cultivation space and the circulating carbon replenishment barrel 510. The photovoltaic panel 100 is connected to the power pump 520 to supply energy to the power pump 520. The microalgae culture solution circulates between the cultivation space and the circulating carbon replenishment barrel 510 at a speed of 20-50 cm / s.

[0055] In this embodiment, if Figure 1 , 5 As shown, since microalgae are photosynthetic autotrophic microorganisms, photosynthesis is carried out during the reproduction process, and CO2 is the substrate of photosynthesis, a circulating carbon replenishment mechanism is set to provide CO2 for the entire system. The circulating carbon replenishment mechanism includes a circulating carbon replenishment barrel 510 and a power pump 520, wherein the circulating carbon replenishment barrel 510 is connected to one end of the cultivation pipeline, and the power pump 520 is connected to the circulating carbon replenishment barrel 510 or the cultivation pipeline to drive the microalgae culture solution to circulate between the cultivation space and the circulating carbon replenishment barrel 510. Specifically, the microalgae culture solution is driven from a flow channel in the cultivation space into the circulating carbon replenishment barrel 510 for carbon replenishment, and returns to another flow channel after carbon replenishment, thereby completing the cycle, wherein the circulation speed during carbon replenishment is controlled between 20-50cm / s, wherein the power pump 520 can be connected to the photovoltaic panel 100, so that the photovoltaic panel 100 provides electrical energy for the power pump 520, thereby improving energy utilization and further realizing energy saving.

[0056] In addition, an aeration mechanism is connected to one end of the circulating carbon replenishment barrel 510. In this embodiment, an aeration mechanism is provided at the bottom of the circulating carbon replenishment barrel 510, and the aeration mechanism can contact the gaseous CO2 with the liquid through uniform small bubbles, and the aeration mechanism dissolves the CO2 in the microalgae culture liquid, further ensuring the cultivation environment of the microalgae.

[0057] In the specific structure of the illumination mechanism 400, the illumination mechanism 400 includes a plurality of LED light sources, which are evenly spaced on the support assembly 300, and the illumination directions of the plurality of LED light sources are arranged relative to the microalgae culture solution. The distance between the LED light source and the liquid surface of the microalgae culture solution is less than 10 cm. The light source coverage length of the LED light source is 20%-80% of the total length of the cultivation pipeline assembly 200. The light intensity of the LED light source is 50-300 μmol / m 2 / s.

[0058] In this embodiment, the lighting mechanism 400 includes a plurality of LED light sources, which are installed on the crossbeam 311 at the top of each support frame 310, wherein the LED light source is arranged relative to the cultivation space so that the LED light source can irradiate the microalgae culture solution to provide light for microalgae cultivation, wherein the distance between the LED light source and the microalgae culture solution is less than 10 cm, and the closer the distance between the LED and the cultivation pipe, the higher the utilization rate of the light. The farther away from the cultivation pipe, the easier it is for the light to be scattered and thus not fully utilized by the microalgae. The light intensity of the LED light source is 50-300 μmol / m 2 / s, the stronger the light, the faster the algae grow. In addition, the number of LED light sources must meet the requirement that the length covered by the LED light source is 20-80% of the total length of the cultivation pipeline. The greater the proportion of the light source covering the cultivation pipeline, the faster the algae grow.

[0059] In addition, the photovoltaic device also includes a photovoltaic support frame 600, which has a first end and a second end opposite to each other, wherein the first end is fixedly connected to the horizontal ground, and the second end is connected to the central area of ​​the photovoltaic panel 100. The lowest end of the photovoltaic panel 100 is 30-50 cm away from the horizontal ground.

[0060] In this embodiment, in the specific structure of installing the photovoltaic panel 100, a photovoltaic support frame 600 is used to support the photovoltaic panel 100, wherein the photovoltaic support frame 600 can be a columnar structure, and the two ends of the photovoltaic support frame 600 respectively form a first end and a second end, wherein the first end can be fixedly connected to the horizontal ground through a cement pile, and the second end is connected to the center position of the back of the photovoltaic panel 100. In one embodiment, the second end and the photovoltaic panel 100 can be hinged to each other to facilitate the adjustment of the inclination angle of the photovoltaic panel 100 to better absorb sunlight. In addition, the distance between the lowest end of the photovoltaic panel 100 and the horizontal ground is 30-50cm, which is convenient for the installation of the photovoltaic panel on the one hand, and can also prevent ground dust from falling on the photovoltaic panel on the other hand.

[0061] It is particularly important to explain that the system includes a plurality of cultivation units arranged at intervals, each cultivation unit includes a photovoltaic device and a cultivation device, and there is a maintenance gap between the photovoltaic panels 100 of two adjacent cultivation units, and the maintenance gap is at least 1 m.

[0062] In this embodiment, if Figure 4 As shown, in order to increase the yield of microalgae and the amount of photovoltaic power generation, multiple rows of cultivation units can be arranged in a predetermined area, wherein each row of cultivation units includes a photovoltaic device and a cultivation device. Specifically, the length direction of the photovoltaic panel 100 is the extension direction of a row, and a photovoltaic panel 100 can be arranged in each row. A maintenance gap is provided between two photovoltaic panels 100 in two adjacent rows of cultivation units, wherein the minimum gap of the maintenance gap can be the gap between the bracket assembly 300 in one row of cultivation units and the photovoltaic panel 100 in another row after the bracket assembly 300 is installed. The maintenance gap is denoted as c, wherein c is at least 1m, for daily maintenance of the photovoltaic panel 100 and the cultivation reaction mechanism.

[0063] The technical scheme of the utility model is further described in detail below in conjunction with several preferred embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model. The test methods in the following embodiments that do not specify specific conditions are usually based on conventional conditions.

[0064] Example 1

[0065] like Figure 3 , 4 As shown, a microalgae cultivation system using photovoltaic green electricity includes a photovoltaic device and a cultivation device, wherein the distance a between the lowest end of the photovoltaic panel 100 and the horizontal ground is 50 cm, and the photovoltaic panel 100 is arranged in an east-west tilted manner, with an inclination angle α of 30°; the width d of the photovoltaic panel 100 is 6 m, and the distance between the photovoltaic panel 100 and the highest end of the ground is related to the width d of the photovoltaic panel 100, that is, b = d × sinα, so the distance b between the highest point of the photovoltaic panel 100 and the horizontal ground is 3 m; the total length of the photovoltaic panel 100 array is 30 m. The photovoltaic panel 100 support assembly is installed vertically, with the upper end being the middle position of the photovoltaic panel 100, and the lower end being fixed to the ground by cement piles;

[0066] The cultivation device includes a support assembly 300 formed by a combination of multiple support frames 310, a cultivation pipeline and a circulating carbon replenishment mechanism. The inclination angle β between the support frame 310 and the ground is 45°; the maximum height h of the support assembly 300 is 2.5m, the width is 2.5m, and the length e is 30m; wherein, the horizontal and vertical beams 311 of the support frame 310 are 0.5m away from h1 and e1; the cultivation pipeline is made of glass with a diameter of 6cm. The total length installed on the support frame 310 is 620m, and the cultivation volume is 1.75 tons; the total volume of the circulating carbon replenishment barrel 510 is 0.5 tons, and the effective volume is 0.25 tons, so the total cultivation volume of each group of reactors is 2 tons.

[0067] Among them, multiple LED light sources are arranged above each cultivation tube, with a distance of 10 cm, the proportion of light coverage of the total length is 20%, and the light intensity is 100 μmol / m 2 / s; the carbon replenishment process supplements CO2 according to the feedback of the pH value of the culture solution. Under the action of the power pump 520, the flow rate of the microalgae culture solution in the cultivation pipeline is 30cm / s; the LED light source and the power pump 520 are both powered by photovoltaic green electricity.

[0068] Chlorella was inoculated in the cultivation pipeline with an inoculation density of 0.2 g / L and a total culture volume of 2 tons. The most suitable pH range for cultivation was set to 7.5, that is, when the pH value was higher than 7.5, the circulating carbon supplement barrel 510 started to supplement CO2, and when it was lower than 7.5, the supplement of CO2 was stopped. The continuous circulation culture was carried out for 10 days, and evaporated water was supplemented every day. At the end of the culture, the cell density of Chlorella was 1.6 g / L; the average growth rate was calculated to be 0.14 g / L / d.

[0069] Comparative Example 1

[0070] The same size of cultivation pipes, arranged in an open-air environment, use natural light for cell growth, and the average growth rate after the same cultivation time is only 0.10 g / L / d. This result shows that the green electricity generated by the photovoltaic panel 100 provides a 24-hour uninterrupted light source for the growth of microalgae, which improves the growth efficiency of microalgae to a certain extent.

[0071] Example 2

[0072] The size of the cultivation pipeline and the arrangement of the photovoltaic panels 100 are the same as those in Example 1, except that the proportion of the total length covered by the LED light source is 80%, and the light intensity is 300 μmol / m 2 / s; inoculate Chlorella in the cultivation pipeline, the inoculation density is 0.2g / L, the total culture volume is 2 tons, and the most suitable pH range for cultivation is set to 7.5, that is, when the pH value is higher than 7.5, the circulating carbon replenishment barrel 510 starts to replenish CO2, and when it is lower than 7.5, the replenishment of CO2 is stopped. The continuous circulation culture is carried out for 10 days, and the evaporated water is replenished every day. At the end of the culture, the cell density of Chlorella is 3.0g / L; the average growth rate is calculated to be 0.28g / m 2 / d.

[0073] Comparative Example 2

[0074] The same size of culture tubes, placed in an open-air environment, using natural light for cell growth, the average growth rate after the same culture time was only 0.09 g / m 2 This result shows that the green electricity generated by the photovoltaic panel 100 provides a 24-hour uninterrupted light source for the growth of microalgae, greatly improving the growth efficiency of the microalgae.

[0075] It should be understood that the above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the utility model.

Claims

1. A microalgae cultivation system using photovoltaic green electricity, characterized in that: include: A photovoltaic device and a cultivation device, wherein the photovoltaic device includes a photovoltaic panel, and the photovoltaic panel is arranged obliquely relative to the ground. The cultivation device includes a cultivation reaction mechanism and a lighting mechanism. The cultivation reaction mechanism is provided with a cultivation space for accommodating microalgae culture solution. The cultivation reaction mechanism is arranged on the lower side of the photovoltaic panel, and the cultivation reaction mechanism is arranged in the shadow area of ​​the photovoltaic panel. The lighting mechanism is at least used to provide light to the cultivation space. The photovoltaic panel is connected to the lighting mechanism to provide energy to the lighting mechanism.

2. A microalgae cultivation system using photovoltaic green electricity according to claim 1, characterized in that: The cultivation reaction mechanism comprises a cultivation pipeline component and a support component, wherein the cultivation pipeline is provided with a cultivation space, the support component is provided with a support space, the cultivation pipeline component is arranged in the support space, the support component is arranged obliquely away from a side of the photovoltaic panel, and the inclination direction of the support component is opposite to the inclination direction of the photovoltaic panel; And / or, the inclination angle of the support assembly is greater than the inclination angle of the photovoltaic panel; And / or, the distance between the highest end of the bracket assembly and the horizontal ground is smaller than the distance between the highest end of the photovoltaic panel and the horizontal ground; And / or, the length of the bracket assembly is consistent with the length of the photovoltaic panel.

3. A microalgae cultivation system using photovoltaic green electricity according to claim 2, characterized in that: The side of the support assembly away from the photovoltaic panel is a stepped structure.

4. A microalgae cultivation system using photovoltaic green electricity according to claim 3, characterized in that: The support assembly comprises a plurality of support frames, and the plurality of support frames are stacked together to form the support assembly with a stepped structure; And / or, the support frame includes a plurality of cross beams and a plurality of vertical beams, and the plurality of cross beams and the plurality of vertical beams are interconnected to form the support space.

5. The microalgae cultivation system using photovoltaic green electricity according to claim 2, characterized in that: The cultivation pipeline assembly includes a plurality of cultivation pipelines, and the plurality of cultivation pipelines are arranged in series; And / or, the culture pipe is a borosilicate glass structure or an organic plastic structure or an organic glass structure; And / or, the outer diameter of the culture channel is 6-12 cm.

6. The microalgae cultivation system using photovoltaic green electricity according to claim 2, characterized in that: The cultivation device further includes a circulating carbon replenishment mechanism, which includes a circulating carbon replenishment barrel and a power pump, wherein the circulating carbon replenishment barrel is connected to the cultivation pipeline assembly, and the power pump is connected to the circulating carbon replenishment barrel to drive the microalgae culture solution to circulate between the cultivation space and the circulating carbon replenishment barrel; and / or, the photovoltaic panel is connected to the power pump to supply energy to the power pump; And / or, one end of the circulating carbon replenishing barrel is connected to an aeration mechanism.

7. The microalgae cultivation system using photovoltaic green electricity according to claim 2, characterized in that: The illumination mechanism comprises a plurality of LED light sources, the plurality of LED light sources are evenly spaced and arranged on the support assembly, and the illumination directions of the plurality of LED light sources are arranged relative to the microalgae culture solution.

8. A microalgae cultivation system using photovoltaic green electricity according to claim 7, characterized in that: The distance between the LED light source and the liquid surface of the microalgae culture solution is less than 10 cm; And / or, the light source coverage length of the LED light source is 20%-80% of the total length of the cultivation pipeline assembly; And / or, the light intensity of the LED light source is 50-300 μmol / m 2 / s.

9. The microalgae cultivation system using photovoltaic green electricity according to claim 1, characterized in that: The photovoltaic device further comprises a photovoltaic support frame, wherein the photovoltaic support frame is provided with a first end and a second end opposite to each other, wherein the first end is fixedly connected to the horizontal ground, and the second end is connected to the central area of ​​the photovoltaic panel; And / or, the distance between the lowest end of the photovoltaic panel and the horizontal ground is 30-50 cm.

10. The microalgae cultivation system using photovoltaic green electricity according to claim 1, characterized in that: include: A plurality of cultivation units are arranged at intervals, each of the cultivation units comprises a photovoltaic device and a cultivation device, and a maintenance gap exists between the photovoltaic panels of two adjacent cultivation units, and the maintenance gap is at least 1m.

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