Round microalgae reactor

Abstract

The utility model discloses a circular microalgae reactor, which belongs to the technical field of microalgae biology and comprises a transparent cylindrical reaction tank, a feed port and a discharge port are respectively arranged at the upper end and the lower end of the cylindrical reaction tank, a stirring mechanism is arranged in the cylindrical reaction tank, and an annular illumination mechanism is arranged on the cylindrical reaction tank. The annular illumination mechanism comprises an annular flexible light guide plate and an LED lamp arranged on the annular flexible light guide plate. Microalgae culture solution and microalgae are added into the cylindrical reaction tank through the feed port, the annular flexible light guide plate and the LED lamp which are arranged on the cylindrical reaction tank provide enough light sources for the circular microalgae reactor, and the flexible light guide plate has the advantages of high luminous efficiency and low power consumption under the condition of equal area luminance; the circular microalgae reactor provided by the utility model can fully utilize light, and the specific surface area of the circular microalgae reactor is higher than that of other microalgae reactors.

Description

Technical Field

[0001] The utility model belongs to the technical field of microalgae biotechnology, and in particular relates to a circular microalgae reactor. Background Art

[0002] Microalgae is a type of unicellular algae widely distributed in freshwater or saltwater. It has strong photosynthesis ability and rapid reproduction ability. During the growth process, it absorbs carbon dioxide, nitrogen and phosphorus in the water body, and accumulates useful substances such as oil, pigment, protein in the cell. Therefore, microalgae has the value of carbon fixation, wastewater treatment, preparation of bioenergy, and production of high value-added products. With the increasing shortage of fossil fuels and the increasing demand for low carbon, the research on large-scale cultivation of microalgae as bioenergy raw materials will have huge social benefits. At present, large-scale photoautotrophic cultivation of microalgae at home and abroad is limited to runway pools, and only Chlorella, Spirulina, Haematococcus pluvialis and Dunaliella salina have been industrialized. The production cost of algae is high, the yield is low, and the product price is expensive, which is far from meeting social needs. According to statistics, microalgae are currently mainly used for health products and animal feed, with a global demand of about 20,000 tons / year, but the production capacity is only 9,000 tons / year, and the production cost is about 20 to 200 US dollars / kg. In order to realize the large-scale production of microalgae-related products, in addition to selecting suitable algae species, it is more important to develop a large-scale, high-efficiency, and low-cost microalgae cultivation device - photobioreactor. Microalgae is a type of unicellular algae widely distributed in freshwater or saltwater bodies. It has a strong photosynthesis ability and rapid reproduction ability. During the growth process, it absorbs carbon dioxide, nitrogen and phosphorus in the water body, and accumulates useful substances such as oil, pigment, protein, etc. in the cell. Therefore, microalgae has the value of carbon fixation, wastewater treatment, preparation of bioenergy, and production of high value-added products. In the context of increasingly tight fossil fuels and increasing low-carbon requirements, the research on large-scale cultivation of microalgae using algae as bioenergy raw materials will produce huge social benefits. At present, large-scale photoautotrophic cultivation of microalgae at home and abroad is limited to runway pools, and only Chlorella, Spirulina, Haematococcus pluvialis and Dunaliella salina have been industrialized. The production cost of algae is high, the yield is low, and the product price is expensive, which is far from meeting social needs. According to statistics, microalgae are currently mainly used in health products and animal feed, with a global demand of about 20,000 tons per year, but the production capacity is only 9,000 tons per year, and the production cost is about 20 to 200 US dollars per kilogram. In order to achieve large-scale production of microalgae-related products, in addition to selecting suitable algae species, it is more important to develop a large-scale, high-efficiency, and low-cost microalgae cultivation device - photobioreactor.

[0003] Photobioreactor is an important device for large-scale cultivation of microalgae. It provides suitable temperature, light, pH, nutrients and mixing for microalgae. Photobioreactors are generally divided into two categories: closed and open pools. Closed photobioreactors mainly include pipeline, column and flat plate types. In open pools, there are mainly runway pools and round pools. At present, large-scale photoautotrophic cultivation of microalgae at home and abroad mainly adopts runway pools. The most typical is the runway pool reactor system, which has the outstanding features of simple structure, convenient operation and low cost, but its culture conditions are difficult to control, easy to be polluted, and low yield. The shortcomings are increasingly valued by people. Although the research on closed reactors such as flat plate, pipeline, and cylindrical types is more expensive, it has advantages in mixed light and easy control of culture conditions. It is the focus of research and development of large-scale photobioreactors at home and abroad. The general photobioreactor has a small specific surface area and low photosynthesis efficiency. It is very difficult to obtain microalgae with a high yield.

[0004] A Chinese patent with publication number CN209456466U and publication date 2019.10.01 discloses a toroidal photobioreactor for microalgae cultivation, comprising an uncovered container and a bottom plate, wherein the uncovered container and the bottom plate are connected by a vertical mirror shell, and a cavity is formed between the lower bottom of the uncovered container, the upper part of the bottom plate and the inner side of the mirror shell; in the cavity, a gas pipeline is provided along the upper inner side of the mirror shell, the gas pipeline is supported by a bracket, and an inflation port is provided on the gas pipeline; columnar photobioreactors are evenly provided along the inner ring of the gas pipeline, the columnar photobioreactors are connected to the gas pipeline, and the columnar photobioreactors are connected by a liquid pipeline provided at the lower part of the columnar photobioreactor to form a liquid flow channel, and a microporous filter membrane is provided on the liquid pipeline connecting adjacent columnar photobioreactors; a drain port is provided on the liquid pipeline; the liquid pipeline is connected to the bottom plate by a vertical pillar to support the liquid pipeline; a lamp post is provided at the center of the cavity. The reactor uses a lamp post as a light source, which has the disadvantage of low light utilization rate. Utility Model Content

[0005] The purpose of the utility model is to solve the problem of low light utilization in the prior art and provide a circular microalgae reactor. Microalgae culture solution and microalgae are added into a cylindrical reaction tank through a feed port. An annular flexible light guide plate and an LED lamp arranged on the cylindrical reaction tank provide sufficient light sources for the circular microalgae reactor. The flexible light guide plate has the advantages of high luminous efficiency and low power consumption under the condition of equal luminous brightness of area. The circular microalgae reactor provided by the utility model can make full use of light, and the specific surface area of ​​the circular microalgae reactor is higher than that of other microalgae reactors.

[0006] The utility model is realized by the following technical solutions:

[0007] A circular microalgae reactor comprises a cylindrical reaction tank, which is transparent, has a feed port and a discharge port respectively arranged at the upper and lower ends of the cylindrical reaction tank, a stirring mechanism arranged inside the cylindrical reaction tank, and an annular lighting mechanism arranged on the cylindrical reaction tank, wherein the annular lighting mechanism comprises an annular flexible light guide plate and an LED lamp arranged on the annular flexible light guide plate.

[0008] Preferably, the LED lamp comprises an LED light bar and a plurality of lamp beads arranged on the LED light bar.

[0009] Preferably, the stirring mechanism includes a stirring motor, a stirring shaft and a stirring paddle, the stirring motor is arranged on a cylindrical reaction tank, the output end of the stirring motor is connected to the stirring shaft, the stirring shaft extends into the interior of the cylindrical reaction tank, and the stirring paddle is arranged on the stirring shaft of the stirring paddle.

[0010] Preferably, a heat dissipation aluminum strip is provided above the LED lamp.

[0011] Preferably, a clamping sleeve is arranged below the LED lamp, and the clamping sleeve is clamped on the annular flexible light guide plate.

[0012] Preferably, the annular illumination mechanism is sleeved on a cylindrical reaction tank.

[0013] Preferably, valves are provided on both the feed port and the discharge port.

[0014] Preferably, the annular lighting mechanism further comprises a light-guiding film, and the light-guiding film is arranged on a side of the annular flexible light-guiding plate close to the cylindrical reaction tank.

[0015] Preferably, the annular lighting mechanism further comprises a reflective coating, and the reflective coating is arranged on a side of the annular flexible light guide plate away from the cylindrical reaction tank.

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0017] 1. The utility model provides a circular microalgae reactor, in which microalgae culture solution and microalgae are added into a cylindrical reaction tank through a feed port, and an annular flexible light guide plate and an LED lamp arranged on the cylindrical reaction tank provide sufficient light sources for the circular microalgae reactor. The flexible light guide plate has the advantages of high luminous efficiency and low power consumption under the condition of equal luminous brightness of area; the circular microalgae reactor provided by the utility model can make full use of light, and the specific surface area of ​​the circular microalgae reactor is higher than that of other microalgae reactors.

[0018] 2. The utility model provides a circular microalgae reactor, LED light strips and lamp beads, which are flexible and can be bent to be conveniently placed on a ring-shaped flexible light guide plate.

[0019] 3. The utility model provides a circular microalgae reactor, in which the heat dissipation aluminum strip can dissipate the heat generated by the LED lamp, thereby avoiding the introduction of heat not required for microalgae cultivation into the circular microalgae reactor, which would cause unnecessary impact on microalgae cultivation.

[0020] 4. The utility model provides a circular microalgae reactor, in which the setting of the sleeve can fix the LED lamp on one side of the annular flexible light guide plate to form side lighting.

[0021] 5. The utility model provides a circular microalgae reactor, which obtains different lights by replacing different light-guiding films to meet the needs of different algae growth or different growth stages of the same algae.

[0022] 6. The circular microalgae reactor provided by the utility model has a reflective film coated on a ring-shaped flexible light guide plate, which has higher processing efficiency than the traditional method of sticking the reflective film on the light guide plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the development of the annular illumination mechanism in the utility model;

[0025] Figure 3 It is a schematic diagram of the light guide film, the reflective coating film and the annular flexible light guide plate in Example 2 of the utility model;

[0026] Among them: 1. Cylindrical reaction tank; 2. Feed inlet; 3. Discharge outlet; 4. Stirring mechanism; 41. Stirring motor; 42. Stirring shaft; 43. Stirring paddle; 5. Annular lighting mechanism; 51. Annular flexible light guide plate; 52. LED lamp; 521. LED light bar; 522. Lamp beads; 53. Light guide film; 54. Reflective coating; 6. Heat dissipation aluminum strip; 7. Card sleeve. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the embodiments, but the implementation manner of the present invention is not limited thereto.

[0028] Example 1

[0029] like Figure 1 and Figure 2As shown, the present embodiment provides a circular microalgae reactor, including a cylindrical reaction tank 1, wherein the cylindrical reaction tank 1 is transparent, and a feed port 2 and a discharge port 3 are respectively provided at the upper and lower ends of the cylindrical reaction tank 1, a stirring mechanism 4 is provided inside the cylindrical reaction tank 1, and an annular lighting mechanism 5 is provided on the cylindrical reaction tank 1, and the annular lighting mechanism 5 includes an annular flexible light guide plate 51 and an LED lamp 52 provided on the annular flexible light guide plate 51.

[0030] The microalgae culture solution and microalgae are added into the cylindrical reaction tank 1 through the feed port 2. The annular flexible light guide plate 51 and the LED lamp 52 arranged on the cylindrical reaction tank 1 provide sufficient light source for the circular microalgae reactor. The flexible light guide plate has the advantages of high luminous efficiency and low power consumption under the condition of equal luminous brightness of area. The circular microalgae reactor provided by the utility model can make full use of light, and the specific surface area of ​​the circular microalgae reactor is higher than that of other microalgae reactors.

[0031] Example 2

[0032] The difference between this embodiment and the first embodiment is that: the LED lamp 52 includes an LED light bar 521 and a plurality of lamp beads 522 arranged on the LED light bar 521. The LED light bar 521 and the lamp beads 522 are flexible and can be bent to be conveniently placed on the annular flexible light guide plate 51.

[0033] Among them, the stirring mechanism 4 includes a stirring motor 41, a stirring shaft 42 and a stirring paddle 43. The stirring motor 41 is arranged on the cylindrical reaction tank 1, and the output end of the stirring motor 41 is connected to the stirring shaft 42. The stirring shaft 42 extends into the interior of the cylindrical reaction tank 1, and the stirring paddle 43 is arranged on the stirring shaft 42 of the stirring paddle 43.

[0034] A heat dissipation aluminum strip 6 is arranged above the LED lamp 52. The heat dissipation aluminum strip 6 can dissipate the heat generated by the LED lamp 52, thereby avoiding the unnecessary heat for microalgae cultivation from being introduced into the circular microalgae reactor, thereby causing unnecessary influence on microalgae cultivation.

[0035] A clamping sleeve 7 is arranged below the LED lamp 52, and the clamping sleeve 7 is clamped on the annular flexible light guide plate 51. The arrangement of the clamping sleeve 7 can fix the LED lamp 52 on one side of the annular flexible light guide plate 51 to form side illumination.

[0036] The annular illumination mechanism 5 is sleeved on the cylindrical reaction tank 1. The annular illumination mechanism 5 is arranged outside the cylindrical reaction tank 1, which can provide sufficient illumination for the cylindrical reaction tank 1 and prevent microalgae from adhering to the annular illumination mechanism 5.

[0037] Wherein, valves are provided on the feed port 2 and the discharge port 3.

[0038] like Figure 3 As shown, the annular illumination mechanism 5 further includes a light guide film 53, which is arranged on one side of the annular flexible light guide plate 51 close to the cylindrical reaction tank 1. By replacing different light guide films 53, different lights can be obtained to meet the needs of different algae growth or different growth stages of the same algae.

[0039] The annular lighting mechanism 5 further includes a reflective coating 54, which is disposed on a side of the annular flexible light guide plate 51 away from the cylindrical reaction tank 1. Plating the reflective film on the annular flexible light guide plate 51 has higher processing efficiency than the conventional method of attaching the reflective film to the light guide plate.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A circular microalgae reactor, characterized in that: The invention comprises a cylindrical reaction tank (1), wherein the cylindrical reaction tank (1) is transparent, and a feed port (2) and a discharge port (3) are respectively arranged at the upper and lower ends of the cylindrical reaction tank (1), a stirring mechanism (4) is arranged inside the cylindrical reaction tank (1), and an annular lighting mechanism (5) is arranged on the cylindrical reaction tank (1), and the annular lighting mechanism (5) comprises an annular flexible light guide plate (51) and an LED lamp (52) arranged on the annular flexible light guide plate (51).

2. A circular microalgae reactor according to claim 1, characterized in that: The LED lamp (52) comprises an LED light bar (521) and a plurality of lamp beads (522) arranged on the LED light bar (521).

3. A circular microalgae reactor according to claim 1, characterized in that: The stirring mechanism (4) comprises a stirring motor (41), a stirring shaft (42) and a stirring paddle (43); the stirring motor (41) is arranged on the cylindrical reaction tank (1); the output end of the stirring motor (41) is connected to the stirring shaft (42); the stirring shaft (42) extends into the interior of the cylindrical reaction tank (1); and the stirring paddle (43) is arranged on the stirring shaft (42) of the stirring paddle (43).

4. The circular microalgae reactor according to claim 1, characterized in that: A heat dissipation aluminum strip (6) is arranged above the LED lamp (52).

5. The circular microalgae reactor according to claim 1, characterized in that: A clamping sleeve (7) is arranged below the LED lamp (52), and the clamping sleeve (7) is clamped on the annular flexible light guide plate (51).

6. The circular microalgae reactor according to claim 1, characterized in that: The annular illumination mechanism (5) is sleeved on the cylindrical reaction tank (1).

7. The circular microalgae reactor according to claim 1, characterized in that: The feed port (2) and the discharge port (3) are both provided with valves.

8. The circular microalgae reactor according to claim 1, characterized in that: The annular lighting mechanism (5) further comprises a light guide film (53), wherein the light guide film (53) is arranged on a side of the annular flexible light guide plate (51) close to the cylindrical reaction tank (1).

9. The circular microalgae reactor according to claim 1, characterized in that: The annular lighting mechanism (5) further comprises a reflective coating (54), wherein the reflective coating (54) is arranged on a side of the annular flexible light guide plate (51) away from the cylindrical reaction tank (1).

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