Photobioreactor system applicable to pollutant treatment and carbon sequestration

Abstract

The invention discloses a photobioreactor system suitable for pollutant treatment and carbon sequestration, and relates to the technical field of pollutant treatment equipment.According to the photobioreactor system, microalgae is utilized for pollutant treatment and carbon sequestration, and a plurality of longitudinally-arranged cylindrical containers are connected in parallel; a plurality of lamp posts are arranged outside cylindrical containers, a disc-shaped scraper blade is arranged in each cylindrical container, and the disc-shaped scraper blades in all the cylindrical containers are driven by magnetic force to be tightly attached to the pipe wall and move up and down in a unified mode. In the moving process of the disc-shaped scraping plate, the effects of stirring algae liquid and dispersing gas are achieved at the same time; the technical effects that the interference of the external environment on the photobioreactor system is small, the cleaning of the adherent microalgae can be conveniently and efficiently completed, the carbon sequestration effect is good, the algae liquid stirring efficiency is high, the damage to the microalgae is small when the algae liquid is stirred, the structure is relatively simple, and the cost is relatively low are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of pollutant treatment equipment, and in particular to a photobioreactor system suitable for treating pollutants and fixing carbon. Background Art

[0002] With the rapid development of my country's economic level and the substantial increase in population, many difficult-to-treat pollutants have been generated, such as various types of slurries such as sludge and organic matter, which seriously endanger the ecological environment; in the prior art, the unique properties of supercritical water are used to efficiently decompose and transform waste; the main component of the waste gas generated by the supercritical water treatment system is carbon dioxide, the main component of the waste water generated is part of the difficult-to-degrade organic matter, and the main component of the waste residue generated is metal salts; and microalgae have many advantages such as fast growth rate, strong carbon fixation ability, high photosynthesis efficiency, and high energy product yield. In the prior art, in order to meet the demand for carbon fixation and the cultivation of microalgae, the supercritical water treatment system is generally connected in series with the microalgae cultivation system, and the waste gas and wastewater obtained by the supercritical water treatment system are used to cultivate microalgae (to achieve pollutant treatment and carbon fixation).

[0003] At present, the devices mainly used in the photobioreactor for cultivating microalgae are open devices and closed devices; the open devices are mainly runway-type shallow water devices, curtain-type devices, etc., although these devices have low investment costs, but because they are open, they occupy a large area, the conditions for cultivating microalgae are uncontrollable, and they are easily affected by weather, temperature, mosquitoes and debris, which is not conducive to large-scale production and processing; the closed devices are mainly columnar devices, cubic devices, spherical devices and pipeline devices; these devices can overcome the influence of external conditions, and are effectively controlled in scale, volume, specific surface area, and floor space, and can improve gas exchange and increase its utilization rate; but in the cultivation process, since microalgae is a photoautotrophic organism, it is very sensitive to parameters such as temperature, pH value, dissolved oxygen, culture medium concentration, and light intensity during growth. Due to competition for nutrients and light between cells, a serious wall adhesion phenomenon is formed. After wall adhesion, the light reaching the inside of the reactor is weakened, which in turn affects the growth and reproduction of internal algae cells; in order to ensure the growth and reproduction of algae cells, it is necessary to regularly clean the closed microalgae cultivation system, and the maintenance cost and complexity are both high.

[0004] The columnar photobioreactor is a vertical cylinder made of transparent material. This type of reactor is usually equipped with an aeration device at the bottom, so it can provide more effective mixing, higher gas-liquid mass transfer rate and better controllable conditions, and the strong mixing degree and gas-liquid mass transfer efficiency can make up for part of the lack of light. However, in large-scale cultivation, the surface area ratio becomes smaller and smaller with the increase of size, and the light attenuation inside the algae liquid is serious, and the photosynthetic efficiency is low. Due to the large volume of the large-capacity container, the amount of culture liquid is large, and the input carbon dioxide is relatively difficult to disperse quickly and evenly, and the generated oxygen is relatively difficult to output, which has a greater negative impact on the efficiency of microalgae cultivation. In the prior art, in order to cultivate microalgae efficiently and make full use of light energy, a mechanical stirring component is usually added to the culture container to increase the turbulence in the algae liquid and increase the flow rate of the algae liquid in the container. Although the mechanical stirring method can accelerate the flow of the algae liquid, the microalgae are greatly damaged during the stirring process.

[0005] If, in order to overcome the shortcomings of the above-mentioned columnar photobioreactor, a plurality of relatively small cylindrical containers are simply connected in parallel as reaction containers, although the above-mentioned defects of using large-capacity containers as reaction containers are overcome, in order to realize the automated cleaning of the adherent microalgae, a plurality of components for cleaning the adherent microalgae need to be provided in the microalgae cultivation system, and these components need to be equipped with independent power sources, and the manufacturing cost and maintenance cost are relatively high.

[0006] Therefore, there is a need for a photobioreactor system that is less affected by the external environment, can conveniently and efficiently complete the cleaning of adherent microalgae, has a high carbon dioxide utilization rate (good carbon fixation effect), has a high efficiency in stirring the algae liquid, causes less damage to the microalgae when stirring the algae liquid, has a relatively simple structure, and can use a power system to drive the scrapers in multiple culture tubes to move, which is suitable for treating pollutants and fixing carbon. Summary of the invention

[0007] The embodiments of the present application provide a photobioreactor system suitable for treating pollutants and fixing carbon, thereby solving the technical problems in the prior art that the photobioreactor system is greatly disturbed by the external environment, it is difficult to efficiently and conveniently complete the cleaning of adherent microalgae, the carbon dioxide utilization rate is low, the negative impact on the microalgae when the algae liquid is stirred is large, the structure is complex and the cost is high; the technical effects that the photobioreactor system is less disturbed by the external environment, can conveniently and efficiently complete the cleaning of adherent microalgae, has a good carbon fixation effect, has a high efficiency in stirring the algae liquid, causes less damage to the microalgae when the algae liquid is stirred, has a relatively simple structure and is relatively low in cost are achieved.

[0008] The embodiment of the present application provides a photobioreactor system suitable for treating pollutants and fixing carbon, including a bottom base, a top cover, a built-in columnar bin, a built-in lamp post for providing illumination and located between the built-in columnar bins, a lifting carrier plate, and a built-in cleaning plate;

[0009] The bottom base and the top cover are both cylindrical hollow blocks, which are arranged one above the other with a guide rail between them, and the side walls are respectively provided with a liquid discharge port, an air inlet and an air outlet, and a liquid inlet and an air outlet;

[0010] The built-in columnar bin is a transparent cylindrical container, with two ends respectively positioned on the bottom base and the top cover and connected to both; an air distributor is fixed near the bottom of the built-in columnar bin through a side bracket;

[0011] The lifting carrier is arranged horizontally and has a plurality of through holes, and is lifted and lowered along the guide rail under the drive of the plate lifting assembly; annular magnets are fixed on the through holes on the built-in columnar bin;

[0012] The built-in cleaning plate is located in the built-in columnar bin, with a scraper on the side wall and a through hole on the top. It moves up and down under the drive of magnetic force to scrape and clean the microalgae attached to the wall.

[0013] Further, the built-in cleaning plate includes a base carrier plate, a side annular bag and an annular scraper;

[0014] The base carrier plate is a hard circular plate with a plurality of channel holes provided thereon;

[0015] The side annular bag is an elastic rubber bag filled with iron powder, which is sleeved and fixed on the side wall of the base carrier plate and deforms under the attraction of magnetic force;

[0016] The annular scraper is a soft ring made of elastic rubber material, with a triangular longitudinal section, which is sleeved on the side wall of the base carrier plate and one surface is fixed on the outer ring of the side annular bag;

[0017] The side annular bag drives the annular scraper to cling to the inner wall of the built-in columnar bin under the influence of magnetic force.

[0018] Preferably, it also includes an outer cover tube;

[0019] The outer cover tube is a hard transparent round tube, which covers all the built-in columnar bins and built-in lamp posts, with the top fixed to the bottom of the top cover body near the edge, and the bottom fixed to the top of the bottom base near the edge.

[0020] Preferably, the through hole on the built-in cleaning plate is a channel hole;

[0021] The channel hole is a truncated cone-shaped hole, which is larger at the top and smaller at the bottom or smaller at the top and larger at the bottom. The algae liquid is stirred during the lifting process to increase the turbulence of the algae liquid and improve the fluidity of the algae liquid.

[0022] Preferably, the volume of the inner space of the bottom base is 0.2 to 0.35 times the total volume of the built-in columnar bin; the inner space of the bottom base has a built-in bottom capsule;

[0023] The bottom bladder is a pancake-shaped rubber elastic bladder, which is connected to the pump air assembly, expands and contracts under the control of the control unit, and the bottom is attached to and fixed to the inner bottom of the internal space of the bottom base;

[0024] When expanded, the bottom sac fills the internal space of the bottom base and squeezes the algae liquid in the bottom base to move it upward to the built-in columnar bin.

[0025] Preferably, a distribution valve is positioned on the exhaust port, and the distribution valve is controlled by the control unit to divide the exhausted gas into two paths, one of which directly discharges the gas to the outside, and the other is discharged into the air inlet and outlet through the connecting pipe, re-enters the air distributor and then is pumped into the built-in columnar bin; a delivery pump is positioned on the connecting pipe;

[0026] The delivery pump is an air pump, which plays the role of pumping gas; a top extrusion bag is fixed on the inner top of the top cover body; the top extrusion bag is a pancake-shaped elastic rubber bag, which is horizontally arranged, with the top surface tightly attached to and fixed on the inner top of the top cover body, connected with the pump gas component, and expands and contracts under the control of the control unit;

[0027] During the microalgae cultivation process, the top extrusion bag expands and contracts regularly to squeeze the gas out of the top cover body; the distribution valve regularly closes the direct exhaust gas path, regularly opens the gas path discharged into the inlet and outlet, and pumps the gas into the air distributor for secondary utilization to fully fix carbon.

[0028] Preferably, the annular magnet is an electromagnet, which is controlled by a control unit to turn on and off power and adjust the magnetic force.

[0029] Preferably, one built-in columnar bin has three built-in cleaning plates built in, and the three built-in cleaning plates are stacked and fixed together;

[0030] The three built-in cleaning plates are the top plate, the middle plate, and the bottom plate;

[0031] The top plate and the bottom plate are not provided with annular scrapers and side annular bags, and both base carrier plates are provided with guide holes; the guide holes are through holes for guiding water flow to flush the annular scrapers on the middle plate;

[0032] The base carrier plates of the three built-in cleaning plates are densely covered with channel holes;

[0033] The annular magnet is an electromagnet;

[0034] When the built-in cleaning plate moves up and down to clean the pipe wall, the adsorption middle plate drives the three built-in cleaning plates to move up and down together.

[0035] Preferably, a top cover tank is fixed on the top of the top plate;

[0036] The top cover tank is a cylindrical tank with an opening facing downward and densely covered with fine holes on the top. The carbon dioxide from the air distributor partially flows into the top cover tank through the channel holes, and the top cover tank redistributes the gas during the lifting and lowering of the top plate.

[0037] Preferably, the annular magnet is a permanent magnet;

[0038] An electromagnet ring is fixed on the top of the side bracket;

[0039] The material of the base carrier is ferromagnetic;

[0040] The electromagnet ring is arranged transversely, and the bottom is fixed to the top of the side bracket, and is located directly below the base carrier plate;

[0041] When it is necessary to shake off the debris on the side annular bag and the annular scraper, the lifting carrier is controlled to move to the bottom; then the electromagnet ring is energized to adsorb the built-in cleaning plate; thereafter, the lifting carrier is controlled to move up and down and the electromagnet ring is controlled to change the magnetic force to achieve shaking cleaning of the side annular bag.

[0042] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0043] By providing a columnar photobioreactor for treating pollutants and fixing carbon using microalgae, a plurality of longitudinally arranged columnar containers are connected in parallel, a plurality of lamp posts are arranged outside the columnar containers, and a disc-shaped scraper is arranged inside each columnar container, and the disc-shaped scrapers in all columnar containers are driven by magnetic force to cling to the tube wall and move up and down in a unified manner; the disc-shaped scraper plays the role of stirring the algae liquid and dispersing the gas during the movement; the technical problems in the prior art that the photobioreactor system is greatly disturbed by the external environment, it is difficult to efficiently and conveniently complete the cleaning of the microalgae attached to the wall, the utilization rate of carbon dioxide is low, the negative impact on the microalgae when stirring the algae liquid is large, the structure is complex and the cost is high are effectively solved; thereby achieving the technical effects that the photobioreactor system is less disturbed by the external environment, can conveniently and efficiently complete the cleaning of the microalgae attached to the wall, has a good carbon fixation effect, has a high efficiency in stirring the algae liquid, causes less damage to the microalgae when stirring the algae liquid, has a relatively simple structure and is relatively low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic diagram of the structure of a photobioreactor system for treating pollutants and fixing carbon applicable to the present application;

[0045] Figure 2 It is a schematic diagram of the positional relationship between the built-in tubular bin and the lifting carrier plate;

[0046] Figure 3 This is a schematic diagram of the appearance and structure of a photobioreactor system suitable for treating pollutants and fixing carbon in this application;

[0047] Figure 4 It is a schematic diagram of the internal structure of the bottom base and the top cover;

[0048] Figure 5 It is a schematic diagram of the positional relationship between the built-in tubular bin and the bottom base;

[0049] Figure 6 It is a schematic diagram of the positional relationship between the built-in cleaning plate, the lifting carrier plate, the air distributor and the bottom base;

[0050] Figure 7 It is a simplified structural diagram of the bottom capsule;

[0051] Figure 8 is a schematic diagram of the structure of the bottom capsule;

[0052] Fig. 9 It is a schematic diagram of the structure of the built-in cleaning plate;

[0053] Fig.10 A schematic diagram of the positional relationship between multiple built-in cleaning plates;

[0054] Fig.11 A schematic diagram of the structure of the guide hole on the built-in cleaning plate;

[0055] Fig.12 It is a schematic diagram of the positional relationship between the top cover tank and the built-in cleaning plate;

[0056] Fig.13 It is a schematic diagram of the positional relationship among the air distributor, the side bracket and the electromagnet ring.

[0057] In the figure:

[0058] Bottom base 100, liquid discharge port 110, air inlet and outlet 120, bottom capsule body 130, air distributor 140, side bracket 141, electromagnet ring body 150, top cover body 200, liquid inlet 210, air outlet 220, top extrusion capsule 230, built-in columnar bin 300, built-in lamp column 400, outer cover tube 500, sliding guide rail 510, lifting carrier plate 600, through hole 610, annular magnet 620, built-in cleaning plate 700, base carrier plate 710, carrier tube 711, horizontal plate 712, channel hole 713, side annular capsule 720, annular scraper 730, top cover tank 740, guide hole 750, distribution valve 810, connecting pipe 820, delivery pump 830. DETAILED DESCRIPTION

[0059] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0060] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0062] Embodiment 1

[0063] like Figures 1 to 6 As shown, the photobioreactor system suitable for treating pollutants and fixing carbon in the present application includes a bottom base 100, a top cover body 200, a built-in columnar bin 300, a built-in lamp column 400, an outer cover tube 500, a lifting carrier plate 600, a built-in cleaning plate 700, a power assembly and a control unit.

[0064] The bottom base 100 is a cylindrical hollow block, positioned on the ground, and has a side wall provided with a liquid discharge port 110 for discharging algae liquid and an air inlet and outlet port 120 for conveying gas.

[0065] The pump air assembly comprises a pump, a control valve and a delivery pipe, and is controlled by a control unit.

[0066] The top cover body 200 is a cylindrical hollow block, which is located directly above the bottom base 100; the side wall of the top cover body 200 is provided with a liquid inlet 210 for pumping in culture fluid and an exhaust port 220 for exhausting gas.

[0067] Furthermore, the liquid discharge port 110 and the liquid inlet 210 are both provided with valve bodies for controlling the on-off of the liquid circuit.

[0068] The built-in columnar bin 300 is a columnar tubular container made of a transparent material, arranged longitudinally, and there are multiple (5 or more) of them, with the bottom fixed to the top of the bottom base 100 and connected to the internal space of the bottom base 100, and the top fixed to the bottom of the top cover 200 and connected to the internal space of the top cover 200, playing the role of a container;

[0069] An air distributor 140 is fixed to the inner wall of the built-in columnar bin 300 near the bottom through a side bracket 141; the air distributor 140 is in the shape of a circular plate as a whole, hollow inside, and densely covered with fine holes on the top, and the internal space is connected to the air inlet and outlet 120 through a hose; the side bracket 141 is rod-shaped, block-shaped or plate-shaped, and is located around the side bracket 141, supporting the air distributor 140 while not affecting the algae liquid (culture solution containing microalgae) entering and exiting the built-in columnar bin 300 at the bottom of the built-in columnar bin 300.

[0070] Preferably, the height of the built-in columnar warehouse 300 is greater than 5 meters and the diameter is less than 0.5 meters.

[0071] Furthermore, the bottom base 100 is cylindrical, wherein one built-in columnar bin 300 is coaxial with the bottom base 100 , and the other built-in columnar bins 300 are evenly distributed around the built-in columnar bin 300 (arranged in a radial pattern).

[0072] The built-in lamp column 400 is a transparent column with a lamp tube arranged inside. It is cylindrical as a whole, with the top fixed to the bottom of the top cover body 200, and the bottom fixed to the top of the bottom base 100. It is arranged longitudinally and there are multiple of them. They are located between the built-in columnar bins 300 and arranged in a ring shape, and are used to supplement the light for the algae liquid in the built-in columnar bins 300.

[0073] The outer cover tube 500 is a hard transparent round tube, which covers all the built-in columnar bins 300 and the built-in lamp posts 400. The top is fixed to the bottom of the top cover body 200 near the edge, and the bottom is fixed to the top of the bottom base 100 near the edge. After the outer cover tube 500 is set, the dirt and wear of the outer wall of the built-in columnar bin 300 can be effectively reduced, and it is easy to clean and maintain.

[0074] Preferably, a transparent film is attached to the outer surface of the outer cover tube 500, and the transparent film is removed and replaced after being used for a period of time.

[0075] A plurality of sliding guide rails 510 for guiding the movement of the lifting carrier plate 600 are disposed on the inner wall of the outer cover tube 500; the sliding guide rails 510 are longitudinally arranged, are straight guide rails and are at the same height as the outer cover tube 500; and the spacing between the sliding guide rails 510 is equal.

[0076] The lifting carrier 600 is a hard circular plate, which is arranged horizontally, and plays the role of carrying the annular magnet 620 and driving the annular magnet 620 to rise and fall; the lifting carrier 600 is slidably positioned on the sliding guide rail 510, and is lifted and lowered under the drive of the plate lifting component; a plurality of through holes 610 for avoiding the built-in columnar bin 300 and the built-in lamp post 400 are fixed on the lifting carrier 600; the through holes 610 are through holes, and the number of the through holes 610 is the sum of the number of the built-in columnar bin 300 and the built-in lamp post 400, and the built-in columnar bin 300 and the built-in lamp post 400 pass through the through holes 610; the plate lifting component is a gear rack structure or a winch structure driven by a motor, which is used to drive the lifting carrier 600 to lift vertically; annular magnets 620 are fixed on the inner side walls of the through holes 610 on the built-in columnar bin 300; the annular magnets 620 are annular permanent magnets, which are used to drive the built-in cleaning plate 700 to rise and fall by magnetic force.

[0077] Furthermore, the distance between the inner wall of the annular magnet 620 and the outer wall of the built-in cylindrical bin 300 is less than 0.5 cm.

[0078] The built-in cleaning plate 700 is located in the built-in columnar bin 300, corresponding to the built-in columnar bin 300 one by one, and is disc-shaped as a whole and is always in a horizontal state;

[0079] The built-in cleaning plate 700 includes a base carrier plate 710, a side annular bag 720 and an annular scraper 730;

[0080] The base carrier plate 710 is a hard circular plate, and is provided with a plurality of channel holes 713 for algae liquid to flow through;

[0081] The side annular bag 720 is an elastic rubber bag filled with iron powder, which is sleeved and (inner ring) fixed on the side wall of the base carrier plate 710 and deforms under the attraction of magnetic force;

[0082] like Fig. 9 As shown, the annular scraper 730 is a soft ring body made of elastic rubber material, with a triangular longitudinal section, which is sleeved on the side wall of the base carrier 710 and one surface is fixed on the outer ring of the side annular capsule 720; the side annular capsule 720 drives the annular scraper 730 to cling to the inner wall of the built-in columnar bin 300 under the influence of magnetic force (to ensure that the annular scraper 730 clings to the inner wall of the built-in columnar bin 300 when scraping off the adherent microalgae).

[0083] Furthermore, the side annular capsule 720 is a circular annular capsule body.

[0084] Furthermore, the side annular bag 720 is formed by fixing the edge of an annular band-shaped rubber sheet on the side wall of the base carrier plate 710 and then combining with the side wall of the base carrier plate 710 .

[0085] Furthermore, the basic carrier plate 710 includes a carrier tube 711 and a transverse plate 712; the carrier tube 711 is a longitudinally arranged hard tube body with a length less than 5 cm and greater than 3 cm; the side annular bag 720 is fixed on the outer wall of the carrier tube 711; the transverse plate 712 is a hard circular plate with its edge fixed on the inner wall of the carrier tube 711; the thickness of the transverse plate 712 is less than the length (height) of the carrier tube 711; and the channel hole 713 is arranged on the transverse plate 712.

[0086] Preferably, the channel hole 713 is a truncated cone-shaped hole, which is larger at the top and smaller at the bottom or smaller at the top and larger at the bottom. The algae liquid is stirred during the lifting process to increase the turbulence of the algae liquid and improve the fluidity of the algae liquid.

[0087] The power assembly is used to provide power for the operation of various components of the photobioreactor system suitable for treating pollutants and fixing carbon in this application, and the control unit plays a role in controlling the coordinated operation of various components of the photobioreactor system suitable for treating pollutants and fixing carbon. Both are prior arts and will not be described in detail here.

[0088] Preferably, the control unit is a combination of a programmable logic controller and control buttons.

[0089] When the photobioreactor system for treating pollutants and fixing carbon according to the embodiment of the present application is used:

[0090] First, the nutrients required for cultivating microalgae are added to the waste liquid output from the supercritical water treatment system (the nutrients are existing technologies, and the components vary according to the different microalgae), and a proper amount of water is added to prepare a culture solution; after the algae are planted in the prepared culture solution, it is pumped into the built-in columnar bin 300 through the liquid inlet 210; and the liquid level is ensured not to exceed the top of the built-in columnar bin 300;

[0091] The air distributor 140 is controlled to continuously output carbon dioxide; the light in the built-in lamp post 400 is controlled to turn on; the algae liquid (culture liquid containing microalgae) undergoes photosynthesis; the generated oxygen is discharged from the exhaust port 220;

[0092] During this period, the lifting plate 600 is controlled to move up and down in a timely manner to scrape off the attached microalgae while stirring the algae liquid and assisting the dispersion of carbon dioxide to improve the microalgae cultivation efficiency; after the microalgae cultivation is completed, it is discharged through the drain port 110.

[0093] Preferably, in order to improve the adequacy of wastewater treatment; Figure 7As shown, the volume of the internal space of the bottom base 100 is 0.2 to 0.35 times the total volume of the built-in columnar bin 300; a bottom bladder 130 is built-in the internal space of the bottom base 100; the bottom bladder 130 is a pancake-shaped rubber elastic bladder, which is connected to the pump air component, expands and contracts under the control of the control unit, and the bottom is attached to and fixed to the inner bottom of the internal space of the bottom base 100; when expanded, the bottom bladder 130 fills the internal space of the bottom base 100 and then squeezes the algae liquid in the bottom base 100 to move it up to the built-in columnar bin 300; when culturing microalgae, the bottom bladder 130 is controlled to expand so that the algae liquid in the bottom base 100 enters the built-in columnar bin 300 to react with carbon dioxide and light.

[0094] Preferably, during the microalgae cultivation process, the bottom bladder 130 is controlled to expand and contract frequently so that the algae liquid can flow faster, thereby improving the microalgae cultivation efficiency and ensuring the uniformity of the microalgae cultivation in each built-in columnar bin 300 .

[0095] Preferably, Figure 8 As shown, the bottom capsule 130 is composed of a plurality of cylindrical elastic capsules, the bottoms of all the cylindrical elastic capsules are positioned on the same plane, and each cylindrical elastic capsule expands and contracts independently; during the microalgae cultivation process, the cylindrical elastic capsules expand and contract alternately to promote the flow of algae liquid.

[0096] Preferably, when the microalgae are discharged, part of the algae liquid is retained on the bottom base 100, and the culture liquid can be directly introduced into the reactor system later without repeatedly planting the algae.

[0097] Preferably, an elastic rubber bag is sleeved on the bottom bag body 130 , and the elastic rubber bag plays a role in protecting the bottom bag body 130 .

[0098] Preferably, a distribution valve 810 is positioned on the exhaust port 220, and the distribution valve 810 is controlled by a control unit to divide the exhausted gas into two paths, one of which discharges the gas directly to the outside, and the other is discharged into the air inlet and outlet 120 through a connecting pipe 820, re-enters the air distributor 140 and then is pumped into the built-in columnar bin 300; a delivery pump 830 is positioned on the connecting pipe 820; the delivery pump 830 is an air pump, which plays the role of pumping gas; a top extrusion bag 230 is fixed on the inner top of the top cover body 200; the top extrusion bag 230 is a pancake-shaped elastic rubber bag, which is horizontally arranged, and the top surface is tightly attached to and fixed on the inner top of the top cover body 200, and is connected to the pump air component, and expands and contracts under the control of the control unit. During the microalgae cultivation process, the top extrusion bag 230 expands and contracts regularly to squeeze the gas in the top cover body 200 out of the top cover body 200; the distribution valve 810 regularly closes the direct discharge gas path and regularly opens the gas path discharged into the inlet and outlet 120, pumping the gas into the air distributor 140 for secondary use to fully fix carbon.

[0099] Preferably, the annular magnet 620 is an electromagnet, which is controlled by a control unit to turn on and off power and adjust the magnetic force.

[0100] Furthermore, when the built-in cleaning plate 700 scrapes and cleans the inner wall of the built-in columnar bin 300, the scraping and cleaning can be performed multiple times with different intensities, thereby obtaining a better cleaning effect.

[0101] Preferably, after the annular scraper 730 is worn, the wear can be compensated by adjusting the magnetic force of the annular magnet 620, thereby extending the service life of the annular scraper 730 and ensuring the stability of the cleaning effect.

[0102] Preferably, during the up and down movement of the annular scraper 730, the annular scraper 730 can be controlled to shake and move up and down by controlling the magnetic force change and lifting of the annular magnet 620, so as to shake off the debris stuck on it, thereby achieving self-cleaning and obtaining a more stable cleaning effect.

[0103] Preferably, Fig.10 As shown, a built-in columnar bin 300 has multiple built-in cleaning plates 700 built in, and the multiple built-in cleaning plates 700 are stacked together. The hardness of the annular scrapers 730 of different built-in cleaning plates 700 is different; different built-in cleaning plates 700 are selected as needed during cleaning.

[0104] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0105] The present invention solves the technical problems in the prior art that the photobioreactor system is greatly disturbed by the external environment, it is difficult to efficiently and conveniently complete the cleaning of the microalgae attached to the wall, the carbon dioxide utilization rate is low, the negative impact on the microalgae when the algae liquid is stirred is large, the structure is complex and the cost is high; the technical effects that the photobioreactor system is less disturbed by the external environment, can conveniently and efficiently complete the cleaning of the microalgae attached to the wall, has a good carbon fixation effect, a high efficiency in stirring the algae liquid, less damage to the microalgae when stirring the algae liquid, a relatively simple structure and a relatively low cost are achieved.

[0106] Embodiment 2

[0107] In order to keep the annular scraper 730 clean and have a strong self-cleaning ability, thereby obtaining a more stable scraping effect; the embodiment of the present application increases the number of built-in cleaning plates 700 in the built-in columnar bin 300 on the basis of the above embodiment, and optimizes and improves the structure of the built-in cleaning plates 700; specifically:

[0108] like Fig.11 As shown, a built-in columnar bin 300 has three built-in cleaning plates 700 built in, and the three built-in cleaning plates 700 are stacked and fixed together;

[0109] For the convenience of description, the three built-in cleaning plates 700 are defined as a top plate, a middle plate, and a bottom plate respectively;

[0110] The top plate and the bottom plate are not provided with annular scrapers 730 and side annular bags 720, and the base carrier plates 710 of the two plates are provided with guide holes 750; the guide holes 750 are through holes for guiding water flow to flush the annular scrapers 730 on the middle plate;

[0111] The base carrier plates 710 of the three built-in cleaning plates 700 are densely covered with channel holes 713;

[0112] The guide holes 750 on the top plate are arranged obliquely and close to the edge of the base carrier plate 710. There are 10 or more guide holes 750 on the top plate, which are larger at the top and smaller at the bottom. When the top plate moves up, the water flow is guided to flush the annular scraper 730 on the middle plate.

[0113] The guide holes 750 on the bottom plate are arranged obliquely and close to the edge of the base carrier plate 710. There are 10 or more guide holes 750 on the bottom plate, which are small at the top and large at the bottom. When the bottom plate moves downward, the water flow is guided to flush the annular scraper 730 on the middle plate.

[0114] The annular magnet 620 is an electromagnet;

[0115] When the built-in cleaning plates 700 move up and down to clean the pipe wall, the adsorption middle plate drives the three built-in cleaning plates 700 to move up and down together.

[0116] Preferably, a side annular capsule 720 is provided on the top plate, and the top plate is stacked on the middle plate but not fixed; the height (thickness) of the annular magnet 620 is smaller than the thickness of the middle plate and the top plate; when only stirring is required (no scraping and cleaning is required), the top plate can be moved up and down by single adsorption.

[0117] Preferably, the bottom plate is also provided with a side annular bag 720, and when stirring is only required (no scraping and cleaning is required), different stirring effects can be obtained by adsorbing different numbers of built-in cleaning plates 700.

[0118] When the annular magnet 620 is attracted to move up and down the bottom plate, the annular scraper 730 on the middle plate does not contact the pipe wall, and the water flow guided by the guide hole 750 has a better flushing effect on the annular scraper 730.

[0119] Preferably, Fig.12 As shown, a top cover tank 740 is fixed on the top of the top plate; the top cover tank 740 is a cylindrical tank body with an opening facing downward and densely covered with fine holes on the top; carbon dioxide from the air distributor 140 passes through the channel hole 713 and is partially poured into the top cover tank 740, and the top cover tank 740 redistributes the gas during the lifting and lowering movement of the top plate.

[0120] Preferably, after the top plate carries the top cover tank 740 to a position above the liquid level, gas will be injected into it, and the downward movement will gradually distribute the carried gas (the gas flow has a certain stirring effect).

[0121] Embodiment 3

[0122] Considering that the annular magnet 620 needs to be continuously powered during the up and down movement of the built-in cleaning plate 700; in order to achieve further energy saving, the embodiment of the present application changes the annular magnet 620 into a permanent magnet on the basis of the above embodiment, and adds an electromagnet ring 150 on the top of the side bracket 141; the material of the base carrier plate 710 is changed to a ferromagnetic material; under the premise that the annular magnet 620 does not need to be continuously powered, it is ensured that the side annular capsule 720 still has the function of shaking off debris; specifically:

[0123] like Fig.13 As shown, the electromagnet ring 150 is disposed transversely, and the bottom is fixed to the top of the side bracket 141, and is located directly below the base carrier plate 710;

[0124] When it is necessary to shake off the debris on the side annular bag 720 and the annular scraper 730, the lifting plate 600 can be controlled to move to the bottom; then the electromagnet ring body 150 is energized to adsorb the built-in cleaning plate 700; thereafter, the lifting plate 600 is controlled to move up and down and the electromagnet ring body 150 is controlled to change the magnetic force to achieve shaking cleaning of the side annular bag 720.

[0125] If a built-in columnar bin 300 contains multiple built-in cleaning plates 700, but one or two need to be sucked up and moved at the same time, the adsorption force for the multiple built-in cleaning plates 700 can be adjusted by controlling the magnetic force of the electromagnet ring 150, and then the annular magnet 620 can be used to selectively suck up and move one or more built-in cleaning plates 700.

[0126] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A photobioreactor system suitable for treating pollutants and fixing carbon, characterized in that: It comprises a bottom base (100), a top cover (200), a built-in columnar bin (300), a built-in lamp post (400) for providing illumination and located between the built-in columnar bins (300), a lifting plate (600), and a built-in cleaning plate (700); The bottom base (100) and the top cover (200) are both cylindrical hollow blocks, which are arranged one above the other with a guide rail arranged between them. The side walls are respectively provided with a liquid discharge port (110), an air inlet and outlet port (120), a liquid inlet port (210), and an air outlet port (220); The built-in columnar bin (300) is a transparent cylindrical container, with two ends respectively positioned on the bottom base (100) and the top cover (200) and connected to both; an air distributor (140) is fixed to the built-in columnar bin (300) near the bottom through a side bracket (141); a lifting plate (600) is arranged horizontally, and is provided with a plurality of through holes (610), which is lifted and lowered along the guide rail under the drive of the plate lifting assembly; annular magnets (620) are fixed to the through holes (610) on the built-in columnar bin (300); The built-in cleaning plate (700) is located in the built-in columnar bin (300), has a scraper plate on the side wall and a through hole on the top, and moves up and down under the drive of magnetic force to scrape and clean the microalgae attached to the wall.

2. The photobioreactor system for treating pollutants and fixing carbon according to claim 1, characterized in that: The built-in cleaning plate (700) comprises a base carrier plate (710), a side annular bag (720) and an annular scraper (730); The base carrier plate (710) is a hard circular plate, and is provided with a plurality of channel holes (713); The side annular bag (720) is an elastic rubber bag filled with iron powder, which is sleeved and fixed on the side wall of the base carrier plate (710) and deforms under magnetic attraction; The annular scraper (730) is a soft ring made of elastic rubber material, with a triangular longitudinal section, which is sleeved on the side wall of the base carrier plate (710) and has one surface fixed on the outer ring of the side annular bag (720); Under the influence of magnetic force, the side annular bag (720) drives the annular scraper (730) to closely adhere to the inner wall of the built-in columnar bin (300).

3. The photobioreactor system for treating pollutants and fixing carbon according to claim 1, characterized in that: Also includes an outer cover tube (500); The outer cover tube (500) is a hard transparent round tube, which covers all the built-in columnar bins (300) and the built-in lamp posts (400), with the top fixed to the bottom of the top cover body (200) near the edge, and the bottom fixed to the top of the bottom base (100) near the edge.

4. The photobioreactor system for treating pollutants and fixing carbon according to claim 1, characterized in that: The through hole on the built-in cleaning plate (700) is a channel hole (713); The channel hole (713) is a truncated cone-shaped hole, which is larger at the top and smaller at the bottom or smaller at the top and larger at the bottom. The algae liquid is stirred during the lifting process to increase the turbulence of the algae liquid and improve the fluidity of the algae liquid.

5. The photobioreactor system for treating pollutants and fixing carbon according to claim 1, characterized in that: The volume of the internal space of the bottom base (100) is 0.2 to 0.35 times the total volume of the built-in columnar bin (300); the bottom bladder (130) is built-in the internal space of the bottom base (100); The bottom bladder (130) is a pancake-shaped rubber elastic bladder, which is connected to the pump air assembly and expands and contracts under the control of the control unit, and the bottom is attached to and fixed to the inner bottom of the internal space of the bottom base (100); When expanded, the bottom bladder (130) fills the internal space of the bottom base (100) and squeezes the algae liquid in the bottom base (100) to move it upward to the built-in columnar bin (300).

6. The photobioreactor system for treating pollutants and fixing carbon according to claim 1, characterized in that: A distribution valve (810) is positioned on the exhaust port (220). The distribution valve (810) is controlled by a control unit to divide the exhausted gas into two paths, one of which directly discharges the gas to the outside, and the other of which is discharged into the air inlet and outlet (120) through a connecting pipe (820), re-enters the air distributor (140) and is then pumped into the built-in columnar bin (300); a delivery pump (830) is positioned on the connecting pipe (820); The delivery pump (830) is an air pump, which plays the role of pumping gas; a top extrusion bag (230) is fixed on the inner top of the top cover body (200); the top extrusion bag (230) is a pancake-shaped elastic rubber bag, which is horizontally arranged, with the top surface tightly attached to and fixed on the inner top of the top cover body (200), connected to the pump air component, and expands and contracts under the control of the control unit; During the microalgae cultivation process, the top extrusion bag (230) expands and contracts regularly to squeeze the gas in the top cover body (200) out of the top cover body (200); the distribution valve (810) regularly closes the direct exhaust gas path and regularly opens the gas path discharged into the inlet and outlet ports (120), pumping the gas into the air distributor (140) for secondary use to fully fix carbon.

7. The photobioreactor system for treating pollutants and fixing carbon according to any one of claims 1 to 6, characterized in that: The annular magnet (620) is an electromagnet, which is controlled by a control unit to turn on and off power and adjust the magnitude of the magnetic force.

8. The photobioreactor system for treating pollutants and fixing carbon according to claim 7, characterized in that: A built-in columnar bin (300) has three built-in cleaning plates (700) built in, and the three built-in cleaning plates (700) are stacked and fixed together; The three built-in cleaning plates (700) are respectively a top plate, a middle plate and a bottom plate; The top plate and the bottom plate are not provided with an annular scraper (730) and a side annular bag (720), and both base carrier plates (710) are provided with a guide hole (750); the guide hole (750) is a through hole, and is used to guide water flow to flush the annular scraper (730) on the middle plate; The base carrier plates (710) of the three built-in cleaning plates (700) are densely covered with channel holes (713); The annular magnet (620) is an electromagnet; When the built-in cleaning plates (700) move up and down to clean the pipe wall, the adsorption middle plate drives the three built-in cleaning plates (700) to move up and down together.

9. The photobioreactor system for treating pollutants and fixing carbon according to claim 8, characterized in that: A top cover tank (740) is fixed on the top of the top plate; The top cover tank (740) is a cylindrical tank body with an opening facing downward and a top densely covered with fine holes; carbon dioxide from the air distributor (140) passes through the channel hole (713) and then partially flows into the top cover tank (740), and the top cover tank (740) redistributes the gas during the lifting and lowering movement of the top plate.

10. The photobioreactor system suitable for treating pollutants and fixing carbon according to any one of claims 1 to 6, characterized in that: The annular magnet (620) is a permanent magnet; An electromagnet ring (150) is fixed on the top of the side bracket (141); The material of the base carrier plate (710) is ferromagnetic material; The electromagnet ring (150) is arranged transversely, with its bottom fixed to the top of the side bracket (141) and located directly below the base carrier plate (710); When it is necessary to shake off the debris on the side annular bag (720) and the annular scraper (730), the lifting plate (600) is controlled to move to the bottom; then the electromagnet ring (150) is controlled to be energized to adsorb the built-in cleaning plate (700); thereafter, the lifting plate (600) is controlled to move up and down and the electromagnet ring (150) is controlled to change the magnetic force to achieve shaking cleaning of the side annular bag (720).

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