Dual-tube haematococcus cultivation system utilizing thermoelectricity

Abstract

The application discloses a kind of dual-tube haematococcus pluvialis culture systems utilizing thermoelectricity, including dual-tube photosynthetic biological reactor, thermoelectricity tube, cooling water circulating device;Dual-tube photosynthetic biological reactor includes culture inner tube, culture outer tube, culture inner tube is located in culture outer tube, culture inner tube, culture outer tube is made of transparent material;Thermoelectricity tube includes power generation inner tube, power generation outer tube, power generation inner tube is located in power generation outer tube, and power generation inner tube outer tube wall is equipped with power generation module;Cooling water circulating device is communicated with power generation outer tube;Culture inner tube liquid outlet is communicated with culture outer tube liquid inlet, culture outer tube liquid outlet is communicated with power generation inner tube liquid inlet, and power generation inner tube liquid outlet is communicated with culture outer tube liquid inlet, and algae liquid can circulate and flow between culture outer tube and power generation inner tube.The green stage and red stage culture are unified in one light biological reactor in the application, and thermoelectricity is realized, water resource is better utilized, and the cascade utilization of light energy and CO2 is also realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of microalgae culture, and particularly relates to a double-tube Haematococcus pluvialis culture system utilizing thermoelectric power generation. BACKGROUND

[0002] In view of the characteristics of two different stages of "green" optimal growth and "red" astaxanthin accumulation of Haematococcus pluvialis in the growth process, the large-scale production of Haematococcus pluvialis mainly adopts a "two-step" culture method, and the culture conditions and reactor types of the two stages are different. In the green stage, a high growth rate of algal cells is obtained by providing sufficient nutrients, suitable temperature and light, and in this stage, indoor or outdoor shading conditions are usually adopted, and a flat plate reactor is usually used. In the red stage, the algal cells need high light intensity to synthesize and accumulate astaxanthin, and in this stage, outdoor direct light irradiation is usually adopted, and the light bioreactor mainly adopts a closed type, such as a pipeline type light bioreactor, a column type light bioreactor, a thin film type light bioreactor and a hemispherical type light bioreactor.

[0003] And no matter the green stage or the red stage, a large amount of cooling water is needed to cool the light bioreactor to ensure the suitable temperature for the growth of Haematococcus pluvialis, and the cooling water directly flows into the sewer after dripping on the outer wall of the reactor, which causes a large amount of waste of water resources and significantly increases the production cost of Haematococcus pluvialis.

[0004] Therefore, a new Haematococcus pluvialis culture system is needed to more effectively improve the utilization efficiency of energy and water resources required for Haematococcus pluvialis culture. SUMMARY

[0005] In view of the above problems existing in the prior art, the application provides a double-tube Haematococcus pluvialis culture system utilizing thermoelectric power generation, which unifies the green stage and the red stage of Haematococcus pluvialis in a light bioreactor through a double-tube photosynthetic bioreactor, and is equipped with a thermoelectric power generation tube and a cooling water circulating device, so that the water resources are better utilized, and the cascade utilization of light energy and CO2 is realized.

[0006] The application adopts the following technical scheme:

[0007] A double-tube Haematococcus pluvialis culture system utilizing thermoelectric power generation, comprising a double-tube photosynthetic bioreactor, a thermoelectric power generation tube and a cooling water circulating device.

[0008] The double-tube photosynthetic bioreactor comprises a culture inner tube and a culture outer tube, and the culture inner tube is arranged in the culture outer tube.

[0009] The thermoelectric power generation tube comprises a power generation inner tube and a power generation outer tube, the power generation inner tube is arranged in the power generation outer tube, and the power generation inner tube is provided with a power generation module.

[0010] The cooling water circulating device is in communication with the power generation outer tube;

[0011] The culture inner tube liquid outlet is in communication with the culture outer tube liquid inlet, the culture outer tube liquid outlet is in communication with the power generation inner tube liquid inlet, the power generation inner tube liquid outlet is in communication with the culture outer tube liquid inlet, and the algae liquid can flow circularly between the culture outer tube and the power generation inner tube.

[0012] As a preferred solution, the culture inner tube and the culture outer tube are made of transparent material.

[0013] As a preferred solution, an algae liquid outlet is arranged on the passage in which the culture outer tube liquid outlet is in communication with the power generation inner tube liquid inlet.

[0014] As a preferred solution, the system further comprises a CO2 supplementing device, and the CO2 supplementing device comprises a CO2 providing end, a gas flow controller and a PH detector connected in sequence.

[0015] The PH detector is arranged on the passage in which the culture outer tube liquid outlet is in communication with the power generation inner tube liquid inlet.

[0016] The culture inner tube is further provided with a culture inner tube gas inlet and a culture inner tube gas outlet, and the culture outer tube is further provided with a culture outer tube gas inlet and a culture outer tube gas outlet.

[0017] The gas flow controller is in communication with the culture outer tube gas inlet, and the culture outer tube gas outlet is in communication with the culture inner tube gas inlet.

[0018] As a preferred solution, an outer tube aerator is arranged at the culture outer tube gas inlet, and the gas flow controller is in communication with the outer tube aerator.

[0019] As a preferred solution, an inner tube aerator is arranged at the culture inner tube gas inlet, and the culture outer tube gas outlet is in communication with the inner tube aerator.

[0020] As a preferred solution, a first three-way valve is arranged at the culture outer tube liquid inlet, a first port of the first three-way valve is in communication with the culture outer tube liquid inlet, the culture inner tube liquid outlet is in communication with a second port of the first three-way valve, and a first circulating pump is arranged on the passage in which the culture inner tube liquid outlet is in communication with the first three-way valve.

[0021] As a preferred solution, the power generation inner tube liquid outlet is in communication with a third port of the first three-way valve, and a second circulating pump is arranged on the passage in which the power generation inner tube liquid outlet is in communication with the first three-way valve.

[0022] As a preferred solution, the power generation module comprises a heat transfer plate and a plurality of series-connected thermoelectric generation sheets, the hot ends of the plurality of thermoelectric generation sheets are attached to the outer tube wall of the power generation inner tube, and the heat transfer plate is sleeved outside the plurality of series-connected thermoelectric generation sheets.

[0023] As a preferred solution, a tail gas filter is arranged at the culture inner tube gas outlet.

[0024] The beneficial effects of the present application are:

[0025] The algae liquid can flow between the culture outer tube and the power generation inner tube, so that the algae liquid can be cooled and thermoelectric power generation can be realized by using the temperature difference between the algae liquid and the cooling water, and the cooling water can be recycled, thereby better utilizing water resources.

[0026] The culture inner tube is arranged in the culture outer tube, the culture inner tube is used for the green culture stage of Haematococcus pluvialis, the culture outer tube is used for the red culture stage of Haematococcus pluvialis, and the algae liquid in the culture outer tube can also indirectly cool the algae liquid in the culture inner tube after being cooled, thereby improving the cooling efficiency.

[0027] The culture inner tube is used for the green culture stage of Haematococcus pluvialis, and only suitable light is needed, the culture outer tube is used for the red culture stage of Haematococcus pluvialis, and strong light is needed, the culture inner tube and the culture outer tube are made of transparent materials, so that light can pass through the culture outer tube and irradiate into the culture inner tube, and one light can meet the culture of the two stages, thereby realizing the step-by-step utilization of light energy.

[0028] The CO2 enters the culture outer tube to provide a carbon source for the red culture stage of Haematococcus pluvialis, and part of the unused CO2 can be introduced into the culture inner tube to provide a carbon source for the green culture stage of Haematococcus pluvialis, thereby realizing the step-by-step utilization of CO2. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 is a structural schematic diagram of a double-tube Haematococcus pluvialis culture system utilizing thermoelectric power generation according to the present application;

[0031] Figure 2 is a structural schematic diagram of a thermoelectric power generation tube according to the present application;

[0032] Figure: 1, culture outer tube, 11, culture outer tube liquid inlet, 12, culture outer tube gas inlet, 13, outer tube aerator, 14, culture outer tube gas outlet, 15, culture outer tube liquid outlet, 16, first check valve, 17, second three-way valve, 18, first valve, 2, culture inner tube, 21, culture inner tube gas inlet, 22, inner tube aerator, 23, culture inner tube gas outlet, 24, culture inner tube liquid outlet, 25, second valve, 26, first circulating pump, 27, third valve, 28, first three-way valve, 31, CO2 supply end, 32, gas flow controller, 33, PH detector, 34, second check valve, 4, power generation outer tube, 41, power generation outer tube liquid inlet, 42, power generation outer tube liquid outlet, 5, power generation inner tube, 51, power generation inner tube liquid inlet, 52, power generation inner tube liquid outlet, 53, second circulating pump, 54, fourth valve, 61, cooling water supply end, 62, cooling water recovery end, 63, cooling water, 7, red algae liquid, 10, green algae liquid, 81, thermoelectric power generation sheet, 82, heat transfer plate, 9, cover. DETAILED DESCRIPTION

[0033] The advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure of the present specification. The present application can also be implemented or applied by different specific embodiments, and the details in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0034] REFERENCE Figure 1 The present embodiment provides a double-tube Haematococcus pluvialis culture system using thermoelectric power generation, which comprises a double-tube photosynthetic organism reactor, a thermoelectric power generation tube, and a cooling water circulation device.

[0035] The double-tube photosynthetic organism reactor comprises a culture inner tube 2 and a culture outer tube 1. The culture inner tube 2 is arranged in the culture outer tube 1. The culture inner tube 2 and the culture outer tube 1 are made of transparent material, which is ordinary glass, tempered glass, quartz glass, organic glass, or plastic with a light transmittance of more than 80%.

[0036] The thermoelectric power generation tube comprises a power generation inner tube 5 and a power generation outer tube 4. The power generation inner tube 5 is arranged in the power generation outer tube 4. The power generation inner tube 5 is provided with a power generation module on the outer tube wall. The power generation inner tube 5 and the power generation outer tube 4 are different in diameter and material, and are nested and not connected to each other. The power generation inner tube 5 is a metal tube, which is a red algae liquid 7 flow channel. The power generation outer tube 4 is a heat insulation material tube, which is a cooling water 63 flow channel.

[0037] The cooling water circulation device is connected to the power generation outer tube 4.

[0038] The culture inner tube outlet 24 is communicated with the culture outer tube inlet 11, the culture outer tube outlet 15 is communicated with the power generation inner tube inlet 51, the power generation inner tube outlet 52 is communicated with the culture outer tube inlet 11, and the red algae liquid 7 can flow between the culture outer tube 1 and the power generation inner tube 5.

[0039] It can be seen that the red algae liquid 7 can flow between the culture outer tube 1 and the power generation inner tube 5, so that the temperature difference between the red algae liquid 7 and the cooling water 63 can be utilized to cool the red algae liquid 7 and realize thermoelectric generation, and the cooling water 63 can be recycled, thereby better utilizing water resources.

[0040] The culture inner tube 2 is arranged in the culture outer tube 1, the culture inner tube 2 is used for the green culture stage of the Haematococcus pluvialis, the culture outer tube 1 is used for the red culture stage of the Haematococcus pluvialis, and the red algae liquid 7 in the culture outer tube 1 can also indirectly cool the green algae liquid 10 in the culture inner tube 2 after being cooled, thereby improving the cooling efficiency.

[0041] The culture inner tube 2 is used for the green culture stage of the Haematococcus pluvialis, and only appropriate illumination is needed, the culture outer tube 1 is used for the red culture stage of the Haematococcus pluvialis, and strong illumination is needed, the culture inner tube 2 and the culture outer tube 1 are made of transparent materials, so that the illumination can pass through the culture outer tube 1 and irradiate into the culture inner tube 2, and one illumination can meet the illumination needs of the two culture stages, thereby realizing the step-by-step utilization of light energy.

[0042] Specifically,

[0043] The culture inner tube 2 and the culture outer tube 1 are both cylindrical vertical pipe reactors, and the diameter ratio of the culture inner tube 2 to the culture outer tube 1 is between 2:5 and 4:5.

[0044] A cover 9 is arranged at the upper end of the reactor, and the cover 9 is detachable and used for injecting the green algae liquid 10 into the culture inner tube 2; the upper end of the cover 9 is provided with a culture inner tube gas outlet 23; the bottom of the culture inner tube 2 is provided with a culture inner tube gas inlet 21 and a culture inner tube liquid outlet 24; and the culture inner tube gas inlet 21 is provided with a culture inner tube aerator 22.

[0045] The side wall of the culture outer tube 1 is provided with a culture outer tube gas inlet 12, a culture outer tube gas outlet 14, a culture outer tube liquid inlet 11 and a culture outer tube liquid outlet 15; the culture outer tube gas inlet 12 is arranged on the right side wall at a distance of 2-5 cm from the bottom of the culture outer tube 1, the direction of the culture outer tube gas inlet 12 is the tangent direction of the culture inner tube 2, and the culture outer tube gas inlet 12 is provided with an outer tube aerator 13; the culture outer tube gas outlet 14 is arranged on the left side wall of the culture outer tube 1 at a distance of 5-10 cm from the cover 9, the direction of the culture outer tube gas outlet 14 is the tangent direction of the culture inner tube 2; the culture outer tube liquid inlet 11 is arranged on the upper part of the right side wall of the culture outer tube 1; and the culture outer tube liquid outlet 15 is arranged on the lower part of the left side wall of the culture outer tube 1.

[0046] In the embodiment, the inner tube aerator 22 and the outer tube aerator 13 are both micro-porous bubble aerators.

[0047] The first three-way valve 28 is arranged at the culture outer tube liquid inlet 11, the first port of the first three-way valve 28 is communicated with the culture outer tube liquid inlet 11, and the culture inner tube liquid outlet 24 is communicated with the second port of the first three-way valve 28 in sequence through the second valve 25, the first circulating pump 26 and the third valve 27. That is, when the green algae liquid 10 in the culture inner tube 2 completes the green stage culture (the green stage culture usually lasts for 5-10 days), the second valve 25, the first circulating pump 26 and the third valve 27 can be opened to input the green algae liquid 10 in the culture inner tube 2 into the culture outer tube 1.

[0048] The second three-way valve 17 is communicated with the power generation inner tube liquid inlet 51 through the culture outer tube liquid outlet 15, one port of the second three-way valve 17 is also connected with the first valve 18, and the power generation inner tube liquid outlet 52 is communicated with the third port of the first three-way valve 28 in sequence through the second circulating pump 53 and the fourth valve 54. That is, when the algae liquid 7 exists in the culture outer tube 1, the second circulating pump 53 and the fourth valve 54 can be opened to make the red algae liquid 7 flow circularly between the culture outer tube 1 and the power generation inner tube 5. It should be noted that, if the red algae liquid 7 which completes the red stage culture (the red stage culture usually lasts for 7-15 days) is needed, the first valve 18 can be opened, and the first valve 18 is the outlet of the red algae liquid 7.

[0049] Further, the cooling water circulating device includes a cooling water supply end 61 and a cooling water recovery end 62, the power generation outer tube 4 includes a power generation outer tube liquid inlet 41 and a power generation outer tube liquid outlet 42, the cooling water supply end 61 is communicated with the power generation outer tube liquid inlet 41, and the cooling water recovery end 62 is communicated with the power generation outer tube liquid outlet 42, so that the cooling water 63 exists in the power generation outer tube 4 and circulates. In the embodiment, the cooling water supply end 61 sends tap water or night low-temperature natural cooling recovery cooling water into the power generation outer tube 4 through the cooling water pump.

[0050] Further, the cooling water 63 circulating in the power generation outer tube 4 and the red algae liquid 7 circulating in the power generation inner tube 5 form a temperature difference, the temperature of the red algae liquid 7 is between 35-20℃, and the temperature of the cooling water 63 is not higher than 20℃. So that the power generation module generates electricity. Referring to Figure 2 , the power generation module includes a heat transfer plate 82 and a plurality of series-connected thermoelectric generation sheets 81, the hot end of the plurality of series-connected thermoelectric generation sheets 81 is attached to the outer tube wall of the power generation inner tube 5, and the heat transfer plate 82 is sleeved outside the plurality of series-connected thermoelectric generation sheets 81. In the embodiment, the thermoelectric generation sheet 81 is a ceramic thermoelectric generation sheet, and the material of the power generation inner tube 5 and the heat transfer plate 82 is a heat-conducting metal material, including copper, aluminum and the like.

[0051] More specifically:

[0052] In the embodiment, the system further comprises a CO2 supplementing device, which comprises a CO2 providing end 31, a gas flow controller 32 and a PH detector 33 connected in sequence. In the embodiment, the CO2 providing end 31 can provide compressed CO2 cylinder gas, coal-fired power plant flue gas and coal chemical plant flue gas.

[0053] The PH detector 33 is arranged on a passage communicated between the culture outer pipe liquid outlet 15 and the power generation inner pipe liquid inlet 51, and the gas flow controller 32 is communicated with the outer pipe aerator 13 arranged at the culture outer pipe gas inlet 12 through a second check valve 34. In the embodiment, the PH detector 33 is used to monitor the PH value, which is a direct representation of the carbon source utilization of the Haematococcus pluvialis, so as to control the CO2 flow and provide appropriate CO2 for the Haematococcus pluvialis, and stabilize the growth environment of the Haematococcus pluvialis.

[0054] Further, the culture outer pipe gas outlet 14 is communicated with the inner pipe aerator 22 arranged at the culture inner pipe gas inlet 21 through a first check valve 16. It should be noted that the green algae liquid 10 completing the green stage culture in the culture inner pipe 2 can be input into the culture outer pipe 1 again to perform the green stage culture, and therefore the remaining CO2 gas after the red algae liquid 7 in the culture outer pipe 1 is utilized can be input into the culture inner pipe 2 again to be utilized, so as to realize the cascade utilization of the CO2 gas.

[0055] Further, the remaining gas in the culture inner pipe 2 can be discharged through the culture inner pipe gas outlet 23. In the embodiment, a tail gas filter is arranged at the culture inner pipe gas outlet 23 to avoid air pollution.

[0056] It should be noted that the communication pipeline in the system adopts a PVC pipe or a hose, which is not limited here.

[0057] The above-described embodiments are merely used to describe the preferred embodiments of the present application, and are not used to limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements of the technical solutions of the present application made by those skilled in the art shall fall into the protection scope of the present application.

Claims

1. A dual-tube Haematococcus pluvialis cultivation system utilizing thermoelectric power generation, characterized in that, Includes a dual-tube photosynthetic bioreactor, a thermoelectric generator tube, and a cooling water circulation device; The dual-tube photosynthetic bioreactor includes an inner culture tube and an outer culture tube, with the inner culture tube located inside the outer culture tube. The thermoelectric generator tube includes an inner power generation tube and an outer power generation tube. The inner power generation tube is located inside the outer power generation tube, and a power generation module is provided on the outer wall of the inner power generation tube. The cooling water circulation device is connected to the generator external pipe; The liquid outlet of the inner culture tube is connected to the liquid inlet of the outer culture tube, the liquid outlet of the outer culture tube is connected to the liquid inlet of the inner power generation tube, and the liquid outlet of the inner power generation tube is connected to the liquid inlet of the outer culture tube. The algal solution can circulate between the outer culture tube and the inner power generation tube. A first three-way valve is provided at the inlet of the culture outer tube. The first port of the first three-way valve is connected to the inlet of the culture outer tube, and the outlet of the culture inner tube is connected to the second port of the first three-way valve. A first circulation pump is provided on the path connecting the outlet of the culture inner tube and the first three-way valve. The liquid outlet of the generator inner tube is connected to the third port of the first three-way valve, and a second circulation pump is provided on the connection path between the liquid outlet of the generator inner tube and the first three-way valve; The system also includes a CO2 replenishment device, which consists of a CO2 supply terminal, a gas flow controller, and a pH detector connected in sequence. The pH detector is located in the passage connecting the liquid outlet of the outer culture tube and the liquid inlet of the inner power generation tube; The inner culture tube is also equipped with an inner culture tube air inlet and an inner culture tube air outlet, and the outer culture tube is also equipped with an outer culture tube air inlet and an outer culture tube air outlet. The gas flow controller is connected to the inlet of the outer culture tube, and the outlet of the outer culture tube is connected to the inlet of the inner culture tube. An external tube aerator is installed at the air inlet of the culture tube, and the gas flow controller is connected to the external tube aerator. An inner tube aerator is installed at the air inlet of the culture inner tube, and the air outlet of the culture outer tube is connected to the inner tube aerator.

2. The dual-tube Haematococcus pluvialis cultivation system utilizing thermoelectric power generation according to claim 1, characterized in that, The inner and outer culture tubes are made of transparent material.

3. The dual-tube Haematococcus pluvialis cultivation system utilizing thermoelectric power generation according to claim 1, characterized in that, An algal liquid outlet is provided on the passage connecting the liquid outlet of the outer culture tube and the liquid inlet of the inner power generation tube.

4. The dual-tube Haematococcus pluvialis cultivation system utilizing thermoelectric power generation according to claim 1, characterized in that, The power generation module includes a heat transfer plate and multiple thermoelectric generators connected in series. The hot ends of the multiple thermoelectric generators are attached to the outer wall of the inner tube of the power generation module, and the heat transfer plate is sleeved on the outside of the multiple thermoelectric generators connected in series.

5. A dual-tube Haematococcus pluvialis cultivation system utilizing thermoelectric power generation according to claim 1, characterized in that, An exhaust gas filter is installed at the outlet of the culture tube.

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