CN109609342B - Utilize haematococcus pluvialis culture system of power plant's flue gas - Google Patents
Utilize haematococcus pluvialis culture system of power plant's flue gas Download PDFInfo
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- CN109609342B CN109609342B CN201811644769.1A CN201811644769A CN109609342B CN 109609342 B CN109609342 B CN 109609342B CN 201811644769 A CN201811644769 A CN 201811644769A CN 109609342 B CN109609342 B CN 109609342B
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Abstract
The application discloses utilize haematococcus pluvialis culture system of power plant's flue gas, include: a horizontal tubular photobioreactor; a circulating buffer tank; a conveying device; the aerator is arranged at one end of the horizontal tubular photobioreactor; the power plant flue gas pipeline is communicated with the aerator through a pipeline; and the first gas mass flowmeter is arranged on a pipeline which is connected to the aerator through the power plant flue gas pipeline and is used for adjusting the flow input by the power plant flue gas. This application can realize the continuous dispersion aeration through setting up the aerator, has both guaranteed that haematococcus pluvialis has sufficient carbon source utilizability all the time, can be with haematococcus pluvialis again to high concentration CO2The demand is reduced to below 15 percent, so that the CO in the flue gas is reduced while the carbon source is provided by the flue gas of a power plant2And (4) discharging, and realizing the effects of energy conservation and emission reduction. This application can guarantee the stability of haematococcus pluvialis culture acid-base environment through realizing real-time supervision and timely gas flow regulation, promotes the growth of haematococcus pluvialis and improves astaxanthin content.
Description
Technical Field
The invention relates to the field of microalgae culture, in particular to a haematococcus pluvialis culture system utilizing flue gas of a power plant.
Background
In the industrial culture process of haematococcus pluvialis, the haematococcus pluvialis is usually cultured in a horizontal tubular photobioreactor at a red stage, the aeration mode is centralized aeration and indirect aeration, namely, the haematococcus pluvialis liquid is aerated in a liquid storage tank, then is input into the horizontal tubular bioreactor without an aeration device, is subjected to light irradiation to induce astaxanthin synthesis, and then is circulated and refluxed to the liquid storage tank to supplement a carbon source. Haematococcus pluvialis in a horizontal tubular photobioreactor not only causes the problem of insufficient carbon source caused by consumption, but also can generate agglomeration and sedimentation or adherence. In addition, Haematococcus pluvialis cultured outdoors on a large scale is responsible for CO2The absorption of the astaxanthin is obviously influenced by illumination conditions, so that the fluctuation of the pH value of the algae liquid is large, and the growth of haematococcus pluvialis and the accumulation of astaxanthin are not facilitated.
Disclosure of Invention
Aiming at the problems, the invention overcomes at least one defect and provides a haematococcus pluvialis culture system utilizing flue gas of a power plant.
The technical scheme adopted by the invention is as follows:
a Haematococcus pluvialis culture system using power plant flue gas, comprising:
a horizontal tubular photobioreactor;
the outlet end of the circulating buffer tank is communicated with the inlet end of the horizontal tubular photobioreactor through a pipeline, and the inlet end of the circulating buffer tank is communicated with the outlet end of the horizontal tubular photobioreactor through a pipeline;
the conveying device is used for enabling the liquid in the circulating buffer tank to flow into the horizontal tubular photobioreactor and enabling the liquid in the horizontal tubular photobioreactor to flow into the circulating buffer tank;
the aerator is arranged at one end of the horizontal tubular photobioreactor;
the power plant flue gas pipeline is communicated with the aerator through a pipeline and is used for conveying power plant flue gas to the horizontal tubular photobioreactor;
and the first gas mass flowmeter is arranged on a pipeline which is connected to the aerator through the power plant flue gas pipeline and is used for adjusting the flow input by the power plant flue gas.
The utility model provides a haematococcus pluvialis culture system sets up the aerator through the one end at horizontal tubular photobioreactor, can realize the continuous dispersion aeration, and the aerator can cause the spiral turbulence in horizontal tubular reactor to improve haematococcus pluvialis and culture solution and CO2The mixing degree of the culture solution improves the utilization efficiency of the culture solution, and simultaneously can prevent haematococcus pluvialis from agglomerating and settling; this application allows Haematococcus pluvialis to contact CO while growing and accumulating astaxanthin under light conditions2After the arrangement, not only can the haematococcus pluvialis be ensured to have sufficient carbon source availability all the time, but also the haematococcus pluvialis can be used for high-concentration CO2The demand is reduced to below 15%, so that the carbon source is provided by using the flue gas of the power plant (CO in the flue gas of the power plant)2Concentration is about 15% generally), and the CO in the flue gas is reduced2And (4) discharging, and realizing the effects of energy conservation and emission reduction.
In one embodiment of the invention, the reactor further comprises a controller and a pH monitoring probe, the pH monitoring probe is installed at one end of the horizontal tubular reactor far away from the aerator, the pH monitoring probe is used for detecting the pH value of the liquid, and the controller is electrically connected with the pH monitoring probe and the first gas mass flowmeter respectively.
The aerator and the pH detection probe are respectively arranged at two ends of the horizontal tubular reactor, so that the data measured by the pH detection probe is accurate.
The controller of this application is used for the work of the first gas mass flowmeter of pH signal control that the probe surveyed according to pH monitoring. CO 22The input amount is difficult to control, and if the input amount is too large, the algae liquid is acidified to generate growth inhibition. Therefore, through the cooperation of the controller, the pH detection probe and the first gas mass flow meter, the flow of the flue gas of the power plant can be adjusted in real time, so that the pH value in the horizontal tubular reactor is in a set range, and the growth inhibition caused by the acidification of the algae liquid can be prevented under the condition of ensuring the sufficiency of the carbon source.
In one embodiment of the present invention, the method further includes:
the air pump is communicated with the aerator through a pipeline and is used for conveying air to the horizontal tubular photobioreactor;
and the second gas mass flow meter is arranged on a pipeline of the air pump connected to the aerator and used for adjusting the input air flow, and the second gas mass flow meter is electrically connected with the controller.
In order to ensure the flow of the algae liquid in the horizontal tubular reactor and prevent the aggregation, sedimentation and adherence of the haematococcus pluvialis, enough aeration is needed to maintain the suspension state of the algae liquid. But when the light intensity is low and the photosynthesis is weak, the concentration of CO in the flue gas of the power plant is about 15 percent2Already in an excess state, the application is carried out by introducing air (CO)2About 0.03%) of the total amount of CO, and can reduce the CO entering the horizontal tubular photobioreactor on the premise of not reducing the aeration amount2And (4) concentration.
During the actual application, the controller can guarantee aeration rate and the stable acid-base environment of algae liquid simultaneously through the work of controlling first gaseous mass flowmeter and second gaseous mass flowmeter. Specifically, when the pH value is smaller, the first gas mass flowmeter reduces the flow of the flue gas of the power plant, and the second gas mass flowmeter increases the flow of the air; however, when the pH value is larger, the first gas mass flowmeter increases the flow of the flue gas of the power plant, and the second gas mass flowmeter reduces the flow and even directly closes the flow.
This application is probed by pH monitoringThe pH value which is an intuitive representation of the carbon source utilization condition of haematococcus pluvialis is monitored on line in real time, and the smoke flow and the air flow are controlled according to the pH value to provide proper amount of CO for the haematococcus pluvialis2And the growth environment of haematococcus pluvialis is stabilized.
In one embodiment of the present invention, the gas input by the air pump and the gas input by the flue gas pipeline of the power plant are merged into the same pipeline.
In one embodiment of the present invention, the aerator is a spiral aerator.
The spiral aerator can better generate spiral turbulence and improve haematococcus pluvialis, culture solution and CO2The degree of mixing of (a).
In one embodiment of the present invention, the outlet end of the horizontal tubular photobioreactor further has a gas outlet, and the haematococcus pluvialis culture system further includes a tail gas filter, wherein the tail gas filter is communicated with the gas outlet through a pipeline, and is configured to filter tail gas discharged after the reaction.
In one embodiment of the present invention, a check valve is installed on the pipeline between the outlet end of the circulation buffer tank and the inlet end of the horizontal tubular photobioreactor; a check valve is arranged on a pipeline between the inlet end of the circulating buffer tank and the outlet end of the horizontal tubular photobioreactor; a check valve is arranged on a pipeline connected with the aerator.
In one embodiment of the present invention, the conveying device is a diaphragm pump.
In one embodiment of the present invention, the conveying device is installed on the pipeline between the outlet end of the circulation buffer tank and the inlet end of the horizontal tubular photobioreactor.
The invention has the beneficial effects that: the utility model provides a haematococcus pluvialis culture system sets up the aerator through the one end at horizontal tubular photobioreactor, can realize the continuous dispersion aeration, and the aerator can cause the spiral turbulence in horizontal tubular reactor to improve haematococcus pluvialis and culture solution and CO2The mixing degree of the culture solution improves the utilization efficiency of the culture solution, and simultaneously can prevent haematococcus pluvialis from agglomerating and settling; this application lets haematococcus pluvialis under light conditionsCO exposure while growing and accumulating astaxanthin2After the arrangement, not only can the haematococcus pluvialis be ensured to have sufficient carbon source availability all the time, but also the haematococcus pluvialis can be used for high-concentration CO2The demand is reduced to below 15%, so that the carbon source is provided by using the flue gas of the power plant (CO in the flue gas of the power plant)2Concentration is about 15% generally), and the CO in the flue gas is reduced2And (4) discharging, and realizing the effects of energy conservation and emission reduction.
Description of the drawings:
FIG. 1 is a schematic diagram of a Haematococcus pluvialis cultivation system using power plant flue gas according to the present invention.
The figures are numbered:
1. a horizontal tubular photobioreactor; 2. a power plant flue gas pipeline; 3. a controller; 4. a first gas mass flow meter; 5. an aerator; 6. a pH monitoring probe; 7. a check valve; 8. a circulating buffer tank; 9. a conveying device; 10. an exhaust gas filter; 11. an air pump; 12. a second gas mass flow meter; 13. and a gas outlet.
The specific implementation mode is as follows:
the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a haematococcus pluvialis culture system using power plant flue gas includes:
a horizontal tubular photobioreactor 1;
the outlet end of the circulating buffer tank 8 is communicated with the inlet end of the horizontal tubular photobioreactor 1 through a pipeline, and the inlet end of the circulating buffer tank 8 is communicated with the outlet end of the horizontal tubular photobioreactor 1 through a pipeline;
a conveying device 9, which is used for making the liquid in the circulating buffer tank 8 flow into the horizontal tubular photobioreactor 1 and making the liquid in the horizontal tubular photobioreactor 1 flow into the circulating buffer tank 8;
the aerator 5 is arranged at one end of the horizontal tubular photobioreactor 1;
the power plant flue gas pipeline 2 is communicated with the aerator 5 through a pipeline and is used for conveying power plant flue gas to the horizontal tubular photobioreactor 1;
and the first gas mass flow meter 4 is arranged on a pipeline, connected to the aerator 5, of the power plant flue gas pipeline 2 and used for regulating the flow input by the power plant flue gas.
The utility model provides a haematococcus pluvialis culture system sets up aerator 5 through the one end at horizontal tubular photobioreactor 1, can realize the continuous dispersion aeration, and aerator 5 can cause the spiral turbulence in horizontal tubular reactor to improve haematococcus pluvialis and culture solution and CO2The mixing degree of the culture solution improves the utilization efficiency of the culture solution, and simultaneously can prevent haematococcus pluvialis from agglomerating and settling; this application allows Haematococcus pluvialis to contact CO while growing and accumulating astaxanthin under light conditions2After the arrangement, not only can the haematococcus pluvialis be ensured to have sufficient carbon source availability all the time, but also the haematococcus pluvialis can be used for high-concentration CO2The demand is reduced to below 15%, so that the carbon source is provided by using the flue gas of the power plant (CO in the flue gas of the power plant)2Concentration is about 15% generally), and the CO in the flue gas is reduced2And (4) discharging, and realizing the effects of energy conservation and emission reduction.
In this application, the concentration refers to the volume concentration.
As shown in fig. 1, in this embodiment, the apparatus further includes a controller 3 and a pH monitoring probe 6, the pH monitoring probe 6 is installed at one end of the horizontal tube reactor far from the aerator 5, the pH monitoring probe 6 is used for detecting the pH value of the liquid, and the controller 3 is electrically connected to the pH monitoring probe 6 and the first gas mass flowmeter 4, respectively.
The aerator 5 and the pH detection probe are respectively arranged at two ends of the horizontal tubular reactor, so that the data measured by the pH detection probe is accurate.
The controller 3 of the present application is used for controlling the operation of the first gas mass flowmeter 4 according to the pH signal measured by the pH monitoring probe 6. CO 22The input amount is difficult to control, and if the input amount is too large, the algae liquid is acidified to generate growth inhibition. Therefore, through the cooperation of the controller 3, the pH detection probe and the first gas mass flow meter 4, the flow of the flue gas of the power plant can be adjusted in real time, so that the pH value in the horizontal tubular reactor is in a set range, and the growth inhibition caused by the acidification of the algae liquid can be prevented under the condition of ensuring the sufficiency of the carbon source.
As shown in fig. 1, in the present embodiment, the method further includes:
an air pump 11 which is communicated with the aerator 5 through a pipeline and is used for conveying air to the horizontal tubular photobioreactor 1;
and a second gas mass flow meter 12 which is arranged on a pipeline of the air pump 11 connected to the aerator 5 and is used for adjusting the input air flow, wherein the second gas mass flow meter 12 is electrically connected with the controller 3.
In order to ensure the flow of the algae liquid in the horizontal tubular reactor and prevent the aggregation, sedimentation and adherence of the haematococcus pluvialis, enough aeration is needed to maintain the suspension state of the algae liquid. But when the light intensity is low and the photosynthesis is weak, the concentration of CO in the flue gas of the power plant is about 15 percent2Already in an excess state, the application is carried out by introducing air (CO)2About 0.03%) of the total amount of CO entering the horizontal tubular photobioreactor 1 can be reduced without reducing the aeration amount2And (4) concentration.
During practical use, the controller 3 can ensure the aeration quantity and the stability of the acid-base environment of the algae liquid simultaneously by controlling the work of the first gas mass flowmeter 4 and the second gas mass flowmeter 12. Specifically, when the pH value is small, the first gas mass flow meter 4 reduces the flow rate of the flue gas of the power plant, and the second gas mass flow meter 12 increases the flow rate of the air; however, when the pH value is too high, the first gas mass flow meter 4 increases the flow rate of the flue gas of the power plant, and the second gas mass flow meter 12 decreases the flow rate and even closes directly.
The application monitors the intuitive representation of the carbon source utilization condition of haematococcus pluvialis on line in real time through the pH monitoring probe 6, namely the pH value, and accordingly controls the flow rate of smoke and air flow and provides a proper amount of CO for the haematococcus pluvialis2And the growth environment of haematococcus pluvialis is stabilized.
As shown in FIG. 1, in this embodiment, the gas from the air pump 11 and the gas from the flue gas duct 2 of the power plant are merged into the same duct for adjusting the CO in the horizontal tubular reactor2The aeration concentration of (2).
In the present embodiment, the aerator 5 is a spiral aerator 5. The spiral aerator 5 can better generate spiral turbulence and improve the red color of rainAlgae, culture solution and CO2The degree of mixing of (a).
As shown in fig. 1, in this embodiment, the outlet end of the horizontal tubular photobioreactor 1 further has a gas outlet 13, and the haematococcus pluvialis culture system further includes a tail gas filter 10, wherein the tail gas filter 10 is communicated with the gas outlet 13 through a pipeline for filtering tail gas discharged after the reaction.
As shown in FIG. 1, in the present embodiment, a check valve 7 is installed on the pipeline between the outlet end of the circulation buffer tank 8 and the inlet end of the horizontal tubular photobioreactor 1; a check valve 7 is arranged on a pipeline between the inlet end of the circulating buffer tank 8 and the outlet end of the horizontal tubular photobioreactor 1; a check valve 7 is arranged on a pipeline connected with the aerator 5.
In this embodiment, the conveying device 9 is a diaphragm pump, and the conveying device 9 is installed on the pipeline between the outlet end of the circulation buffer tank 8 and the inlet end of the horizontal tubular photobioreactor 1.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields and are included in the scope of the present invention.
Claims (5)
1. The utility model provides an utilize haematococcus pluvialis culture system of power plant's flue gas which characterized in that includes:
a horizontal tubular photobioreactor;
the outlet end of the circulating buffer tank is communicated with the inlet end of the horizontal tubular photobioreactor through a pipeline, and the inlet end of the circulating buffer tank is communicated with the outlet end of the horizontal tubular photobioreactor through a pipeline;
the conveying device is used for enabling the liquid in the circulating buffer tank to flow into the horizontal tubular photobioreactor and enabling the liquid in the horizontal tubular photobioreactor to flow into the circulating buffer tank;
the aerator is arranged at one end of the horizontal tubular photobioreactor;
the power plant flue gas pipeline is communicated with the aerator through a pipeline and is used for conveying power plant flue gas to the horizontal tubular photobioreactor;
the first gas mass flowmeter is arranged on a pipeline of a flue gas pipeline of the power plant, which is connected to the aerator and used for regulating the flow input by the flue gas of the power plant;
the pH monitoring probe is arranged at one end of the horizontal tube type photobioreactor far away from the aerator and used for detecting the pH value of liquid, and the controller is electrically connected with the pH monitoring probe and the first gas mass flowmeter respectively;
the aerator is a spiral aerator;
the air pump is communicated with the aerator through a pipeline and is used for conveying air to the horizontal tubular photobioreactor;
the second gas mass flow meter is arranged on a pipeline of the air pump connected to the aerator and used for adjusting the input air flow, and the second gas mass flow meter is electrically connected with the controller; the gas input by the air pump and the gas input by the power plant flue gas pipeline are converged on the same pipeline and used for adjusting the CO of the horizontal tubular photobioreactor2The aeration concentration of (2).
2. The power plant flue gas-utilizing haematococcus pluvialis cultivation system of claim 1, wherein an outlet end of the horizontal tubular photobioreactor is further provided with a gas outlet, and the haematococcus pluvialis cultivation system further comprises a tail gas filter, wherein the tail gas filter is communicated with the gas outlet through a pipeline and is used for filtering tail gas exhausted after the reaction.
3. The power plant flue gas-utilizing haematococcus pluvialis cultivation system of claim 1, wherein a check valve is installed on a pipeline between an outlet end of the circulation buffer tank and an inlet end of the horizontal tubular photobioreactor; a check valve is arranged on a pipeline between the inlet end of the circulating buffer tank and the outlet end of the horizontal tubular photobioreactor; a check valve is arranged on a pipeline connected with the aerator.
4. The power plant flue gas-utilizing haematococcus pluvialis cultivation system of claim 1, wherein the conveying device is a diaphragm pump.
5. The power plant flue gas-utilizing Haematococcus pluvialis cultivation system of claim 4, wherein the transportation device is installed on a pipeline between an outlet end of the circulation buffer tank and an inlet end of the horizontal tubular photobioreactor.
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| CN110699252A (en) * | 2019-11-08 | 2020-01-17 | 安徽德宝生物科技有限公司 | Algae continuous culture reaction system |
| CN110684644B (en) * | 2019-11-08 | 2020-11-24 | 安徽德宝生物科技有限公司 | Photobioreactor for algae cultivation |
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